PLANETARY GEAR DEVICE

The present invention relates to a planetary gear device having four or more shafts. The planetary gear device according to the present invention may be expanded by adding another planetary gear device to the planetary gear device in the related art, all shafts of the planetary gear device are exposed to the outside such that a brake may be easily installed, and the shafts may be divided into two groups and separated. The planetary gear device according to the present invention may be used for an apparatus for connecting, braking, and separating an automatic transmission, a plurality of power supplying shafts, and a plurality of power receiving shafts and used to integrate two apparatuses.

BACKGROUND

Technical Field

A planetary gear device refers to a gear device including one gear, and another gear disposed around one gear and configured to rotate while engaging with another gear. The planetary gear device is used in various fields such as a differential gear device and an automatic transmission of a vehicle. There are many different uses of the planetary gear device, and thus the planetary gear device has various detailed functions and various shapes.

The planetary gear device, which is often used for the automatic transmission, is configured such that planet gears, which are each provided in the form of a spur gear, rotate around a sun gear while engaging with the sun gear, a ring gear rotates while engaging with outer portions of the planet gears, and the planet gears are installed on a carrier.

The planetary gear device, which is often used for a differential gear device, is configured such that planet gears, which are differential pinions each provided in the form of a bevel gear, rotate around two sun gears, which are differential side gears each provided in the form of a bevel gear, while engaging with the two sun gears. The differential pinion is installed on a carrier called a differential casing. Hereinafter, the differential casing will be referred to as a ‘differential carrier’ or ‘carrier’.

The planet gear of the planetary gear device, which is used for the automatic transmission, and the differential pinion of the planetary gear device, which is used for the differential gear device, are planet gears that may simultaneously rotate and revolve.

Background Art

The planetary gear device in the related art has three shafts capable of being connected to one another. The three shafts are a sun gear shaft, a ring gear shaft, and a carrier shaft in the case of the planetary gear device used for the automatic transmission. The three shafts are shafts of the two differential side gears and a driving shaft for rotating the differential pinion in the case of the planetary gear device used for the differential gear device.

In the case of the automatic transmission, there is a tendency to slowly perform a shift operation by dividing a shift stage into several steps. To satisfy the tendency, there is a tendency to use an increasingly large number of planetary gear devices for the single automatic transmission. Therefore, it is possible to reduce a required number of planetary gear devices when the planetary gear device, in which four or more shafts may be connected to one another and used, is provided.

Recently, in a vehicle, an internal combustion engine, an electric generator, an electric motor, a regenerative braking generator, and a driving shaft may be connected together. Therefore, it is necessary to freely add a rotational force generated by the internal combustion engine, the electric motor, and the driving shaft and freely transmit the added rotational force to the electric generator, the regenerative braking generator, and the driving shaft or brake the electric generator, the regenerative braking generator, and the driving shaft. In addition, it is necessary to divide the connected shafts into two groups and separate the connected shafts. The planetary gear device may be integrated with the transmission depending on the number of shafts.

Therefore, it will be convenient in case that the planetary gear device, in which four or more shafts may be connected to one another and used, power may be applied to the shafts, and the shafts may be braked and separated.

SUMMARY OF THE INVENTION

An object to be achieved by the present invention is to provide a planetary gear device in which four or more shafts may be connected to one another and used.

The planetary gear device may use concentric hollow shafts, the shaft, a gear connected to the shaft, or a part connected to the gear may be exposed to the outside to install a brake, and the shafts may be divided into two groups so that the power and the rotation may be separated.

A plurality of planetary gear devices in the related art and a plurality of differential gear devices in the related art are interchangeably used, and a concentric hollow shaft, a disc, a cylinder, a wheel, and a ring are used to ensure a space in which a brake may be installed.

The planetary gear device according to the present invention, in which the four or more shafts may be connected to each other and used, is applied to the automatic transmission, such that the single planetary gear device may implement a combination of a plurality of rotational forces, which makes it possible to implement a large number of shift stages even though a small number of planetary gear devices is adopted.

In addition, in the case of a hybrid vehicle, it is necessary to connect a plurality of power supplying devices and a plurality of power receiving devices, brake some of the connected devices, or divide the connected devices into two groups and separate the connected devices. This problem may be simply solved by using the planetary gear device according to the present invention in which the four or more shafts may be connected to one another, and the devices and the transmission may be integrated into a single configuration.

DETAILED DESCRIPTION

FIG.1briefly illustrates a cross-section of a four-axis planetary gear device configured to be assembling a first sun double-sided gear1, a first ring double-sided gear2, a first planet gear3, a sun carrier shaft4, a first carrier5, a ring6, a sun pinion7, a sun protrusion shaft8, a ring pinion9, a ring protrusion shaft10, a second sun double-sided gear11, a second ring double-sided gear12, a second planet gear13, and a second carrier15. The two carriers5and15are respectively illustrated as having hollow shafts, but the ring6is not illustrated as having a hollow shaft in the same way. The ring6has a gear formed on an outer portion thereof and implements gear connection. The ring6is omitted because a brake is often installed, but the ring6is not a component that needs to be eliminated. As necessary, the ring6may be configured to have a hollow shaft.

FIG.2illustrates a cross-sectional view of one part of the disassembled four-axis planetary gear device illustrated inFIG.1and illustrates a perspective view of another part of the disassembled four-axis planetary gear device.

The sun protrusion shaft8is provided in the form of a protrusion at a periphery of the sun carrier shaft4, and the sun pinion7is installed on the sun protrusion shaft8. The number of sun protrusion shafts8and the number of sun pinions7are not limited. The first sun double-sided gear1and the second sun double-sided gear11, which engage with two opposite sides of the sun pinion7, are installed on the sun carrier shaft4so as to idle.

The ring protrusion shaft10is provided in the form of a protrusion at an inner periphery of the ring6, and the ring pinion9is installed on the ring protrusion shaft10. The number of ring protrusion shafts10and the number of ring pinions9are not limited. The first ring double-sided gear2and the second ring double-sided gear12engage with two opposite sides of the ring pinion9.

The first planet gear3is installed on the first carrier5, and the second planet gear13is installed on the second carrier15. The number of planet gears3and13respectively installed on the carriers5and15is not limited. One side of the first planet gear3engages with the first sun double-sided gear1, and the other side of the first planet gear3engages with the first ring double-sided gear2. One side of the second planet gear13engages with the second sun double-sided gear11, and the other side of the second planet gear13engages with the second ring double-sided gear12.

Gear teeth are omitted without being illustrated. The gear teeth, which are omitted from the drawings, are gear teeth provided on outer portions of the first planet gear3, the second planet gear13, the sun pinion7, and the ring pinion9, gear teeth provided on a portion17of an outer portion of the first sun double-sided gear1engaging with the first planet gear3, gear teeth provided on a portion18of the outer portion of the first sun double-sided gear1engaging with the sun pinion7, gear teeth provided on a portion of an outer portion of the second sun double-sided gear11engaging with the second planet gear13, gear teeth provided on a portion of the outer portion of the second sun double-sided gear11engaging with the sun pinion7, gear teeth provided on a portion of an inner portion of the first ring double-sided gear2engaging with the first planet gear3, gear teeth provided on a portion20of an outer portion of the first ring double-sided gear2engaging with the ring pinion9, gear teeth provided on a portion19of an inner portion of the second ring double-sided gear12engaging with the second planet gear13, and gear teeth provided on a portion of an outer portion of the second ring double-sided gear12engaging with the ring pinion9.

A relationship between the components, which are in contact with each other but idle, is implemented between the first sun double-sided gear1and the sun carrier shaft4, between the second sun double-sided gear11and the sun carrier shaft4, between the shaft of the first carrier5and the sun carrier shaft4, and between the shaft of the second carrier15and the sun carrier shaft4.

FIG.3briefly illustrates a cross-section of a five-axis planetary gear device configured by assembling a first sun gear31, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, a first sun gear shaft34, a second sun gear41, the second ring double-sided gear12, the second planet gear13, the second carrier15, and a second sun gear shaft44. The two carriers5and15are respectively illustrated as having hollow shafts, but the ring6is not illustrated as having a hollow shaft in the same way. The ring6has a gear formed on an outer portion thereof and implements gear connection. The ring6is omitted because a brake is often installed, but the ring6is not a component that needs to be eliminated. As necessary, the ring6may be configured to have a hollow shaft.

FIG.4illustrates a cross-sectional view of one part of the disassembled five-axis planetary gear device illustrated inFIG.3and illustrates a perspective view of another part of the disassembled five-axis planetary gear device.

The first sun gear31is installed on the first sun gear shaft34so as not to idle, and the second sun gear41is installed on the second sun gear shaft44so as not to idle.

The ring protrusion shaft10is provided in the form of a protrusion at an inner periphery of the ring6, and the ring pinion9is installed on the ring protrusion shaft10. The number of ring protrusion shafts10and the number of ring pinions9are not limited. The first ring double-sided gear2and the second ring double-sided gear12engage with two opposite sides of the ring pinion9.

The first planet gear3is installed on the first carrier5, and the second planet gear13is installed on the second carrier15. The number of planet gears3and13respectively installed on the carriers5and15is not limited. One side of the first planet gear3engages with the first sun gear31, and the other side of the first planet gear3engages with the first ring double-sided gear2. One side of the second planet gear13engages with the second sun gear41, and the other side of the second planet gear13engages with the second ring double-sided gear12.

Gear teeth are omitted without being illustrated. The gear teeth, which are omitted from the drawings, are gear teeth provided on the outer portions of the first planet gear3, the second planet gear13, and the ring pinion9, gear teeth provided on the portion of the outer portion of the first sun gear31engaging with the first planet gear3, gear teeth provided on the portion of the outer portion of the second sun gear41engaging with the second planet gear13, gear teeth provided on the portion of the inner portion of the first ring double-sided gear2engaging with the first planet gear3, gear teeth provided on the portion20of the outer portion of the first ring double-sided gear2engaging with the ring pinion9, gear teeth provided on the portion19of the inner portion of the second ring double-sided gear12engaging with the second planet gear13, and gear teeth provided on the portion of the outer portion of the second ring double-sided gear12engaging with the ring pinion9.

A relationship between the components, which are in contact with each other but idle, is implemented between the shaft of the first carrier5and the first sun gear shaft34and between the shaft of the second carrier15and the second sun gear shaft44. The first sun gear31and the first sun gear shaft34do not idle relative to each other, and the second sun gear41and the second sun gear shaft44do not idle relative to each other.

FIG.5briefly illustrates a cross-section of a five-axis planetary gear device configured by assembling the first sun double-sided gear1, the first planet gear3, the sun carrier shaft4, the first carrier5, the sun pinion7, the sun protrusion shaft8, the second sun double-sided gear11, the second planet gear13, the second carrier15, a first ring gear52, and a second ring gear62. The two carriers5and15are respectively illustrated as having hollow shafts, but the two ring gears52and62are not illustrated as having hollow shafts in the same way. The two ring gears52and62each have a gear formed on an outer portion thereof and implements gear connection. The two ring gears52and62are omitted because a brake is often installed, but the two ring gears52and62are not components that need to be eliminated. As necessary, the two ring gears52and62may each be configured as a shaft.

FIG.6illustrates a cross-sectional view of one part of the disassembled five-axis planetary gear device illustrated inFIG.5and illustrates a perspective view of another part of the disassembled five-axis planetary gear device.

The sun protrusion shaft8is provided in the form of a protrusion at a periphery of the sun carrier shaft4, and the sun pinion7is installed on the sun protrusion shaft8. The number of sun protrusion shafts8and the number of sun pinions7are not limited. The first sun double-sided gear1and the second sun double-sided gear11, which engage with two opposite sides of the sun pinion7, are installed on the sun carrier shaft4so as to idle.

The first planet gear3is installed on the first carrier5, and the second planet gear13is installed on the second carrier15. The number of planet gears3and13respectively installed on the carriers5and15is not limited. One side of the first planet gear3engages with the first sun double-sided gear1, and the other side of the first planet gear3engages with the first ring gear52. One side of the second planet gear13engages with the second sun double-sided gear11, and the other side of the second planet gear13engages with the second ring gear62.

Gear teeth are omitted without being illustrated. The gear teeth, which are omitted from the drawings, are gear teeth provided on the outer portions of the first planet gear3, the second planet gear13, and the sun pinion7, gear teeth provided on the portion17of the outer portion of the first sun double-sided gear1engaging with the first planet gear3, gear teeth provided on the portion18of the outer portion of the first sun double-sided gear1engaging with the sun pinion7, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the second planet gear13, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the sun pinion7, gear teeth provided on the portion of the inner portion of the first ring gear52engaging with the first planet gear3, and gear teeth provided on the portion of the inner portion of the second ring gear62engaging with the second planet gear13.

A relationship between the components, which are in contact with each other but idle, is implemented between the first sun double-sided gear1and the sun carrier shaft4, between the second sun double-sided gear11and the sun carrier shaft4, between the shaft of the first carrier5and the sun carrier shaft4, and between the shaft of the second carrier15and the sun carrier shaft4.

FIG.7briefly illustrates a cross-section of a seven-axis planetary gear device configured by assembling the first sun double-sided gear1, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, a third sun carrier shaft74, a third sun pinion77, a third sun protrusion shaft78, a third differential side bevel gear79, a third differential side bevel gear shaft94, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, a fourth sun carrier shaft84, a fourth sun pinion87, a fourth sun protrusion shaft88, a fourth differential side bevel gear89, and a fourth differential side bevel gear shaft104. The two carriers5and15are respectively illustrated as having hollow shafts, but the ring6is not illustrated as having a hollow shaft in the same way. The ring6has a gear formed on an outer portion thereof and implements gear connection. The ring6is omitted because a brake is often installed, but the ring6is not a component that needs to be eliminated. As necessary, the ring6may be configured to have a hollow shaft.

FIG.8illustrates a cross-sectional view of one part of the disassembled seven-axis planetary gear device illustrated inFIG.7and illustrates a perspective view of another part of the disassembled seven-axis planetary gear device.

The third sun protrusion shaft78is provided in the form of a protrusion at a periphery of the third sun carrier shaft74, and the third sun pinion77is installed on the third sun protrusion shaft78. The number of third sun protrusion shafts78and the number of third sun pinions77are not limited. The first sun double-sided gear1and the third differential side bevel gear79engage with two opposite sides of the third sun pinion77. The first sun double-sided gear1is installed on the third sun carrier shaft74so as to idle. The third sun carrier shaft74is installed on the third differential side bevel gear shaft94so as to idle. The third differential side bevel gear79is installed on the third differential side bevel gear shaft94so as not to idle.

The fourth sun protrusion shaft88is provided in the form of a protrusion at a periphery of the fourth sun carrier shaft84, and the fourth sun pinion87is installed on the fourth sun protrusion shaft88. The number of fourth sun protrusion shafts88and the number of fourth sun pinions87are not limited. The second sun double-sided gear11and the fourth differential side bevel gear89engage with two opposite sides of the fourth sun pinion87. The second sun double-sided gear11is installed on the fourth sun carrier shaft84so as to idle. The fourth sun carrier shaft84is installed on the fourth differential side bevel gear shaft104so as to idle. The fourth differential side bevel gear89is installed on the fourth differential side bevel gear shaft104so as not to idle.

The ring protrusion shaft10is provided in the form of a protrusion at an inner periphery of the ring6, and the ring pinion9is installed on the ring protrusion shaft10. The number of ring protrusion shafts10and the number of ring pinions9are not limited. The first ring double-sided gear2and the second ring double-sided gear12engage with two opposite sides of the ring pinion9.

The first planet gear3is installed on the first carrier5, and the second planet gear13is installed on the second carrier15. The number of planet gears3and13respectively installed on the carriers5and15is not limited. One side of the first planet gear3engages with the first sun double-sided gear1, and the other side of the first planet gear3engages with the first ring double-sided gear2. One side of the second planet gear13engages with the second sun double-sided gear11, and the other side of the second planet gear13engages with the second ring double-sided gear12.

Gear teeth are omitted without being illustrated. The gear teeth, which are omitted from the drawings, are gear teeth provided on outer portions of the first planet gear3, the second planet gear13, the ring pinion9, the sun bevel gears77and87, and the differential side bevel gears79and89, gear teeth provided on the portion17of the outer portion of the first sun double-sided gear1engaging with the first planet gear3, gear teeth provided on the portion18of the outer portion of the first sun double-sided gear1engaging with the third sun pinion77, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the second planet gear13, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the fourth sun pinion87, gear teeth provided on the portion of the inner portion of the first ring double-sided gear2engaging with the first planet gear3, gear teeth provided on the portion20of the outer portion of the first ring double-sided gear2engaging with the ring pinion9, gear teeth provided on the portion19of the inner portion of the second ring double-sided gear12engaging with the second planet gear13, and gear teeth provided on the portion of the outer portion of the second ring double-sided gear12engaging with the ring pinion9.

A relationship between the components, which idle, is implemented between the first sun double-sided gear1and the third sun carrier shaft74, between the second sun double-sided gear11and the fourth sun carrier shaft84, between the shaft of the first carrier5and the third sun carrier shaft74, between the shaft of the second carrier15and the fourth sun carrier shaft84, between the third sun carrier shaft74and the third differential side bevel gear shaft94, and between the fourth sun carrier shaft84and the fourth differential side bevel gear shaft104. A relationship between the components, which do not idle, is implemented between the third differential side bevel gear79and the third differential side bevel gear shaft94and between the fourth differential side bevel gear89and the fourth differential side bevel gear shaft104.

FIG.9briefly illustrates a cross-section of a six-axis planetary gear device configured by assembling the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the first sun gear shaft34, the first sun gear31, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the fourth sun carrier shaft84, the fourth sun pinion87, the fourth sun protrusion shaft88, the fourth differential side bevel gear89, and the fourth differential side bevel gear shaft104. The two carriers5and15are respectively illustrated as having hollow shafts, but the ring6is not illustrated as having a hollow shaft in the same way. The ring6has a gear formed on an outer portion thereof and implements gear connection. The ring6is omitted because a brake is often installed, but the ring6is not a component that needs to be eliminated. As necessary, the ring6may be configured to have a hollow shaft.

FIG.10illustrates a cross-sectional view of one part of the disassembled six-axis planetary gear device illustrated inFIG.9and illustrates a perspective view of another part of the disassembled six-axis planetary gear device.

The first sun gear31is installed on the first sun gear shaft34so as not to idle, the fourth sun protrusion shaft88is provided in the form of a protrusion at a periphery of the fourth sun carrier shaft84, and the fourth sun pinion87is installed on the fourth sun protrusion shaft88. The number of fourth sun protrusion shafts88and the number of fourth sun pinions87are not limited. The second sun double-sided gear11and the fourth differential side bevel gear89engage with two opposite sides of the fourth sun pinion87. The second sun double-sided gear11is installed on the fourth sun carrier shaft84so as to idle. The fourth sun carrier shaft84is installed on the fourth differential side bevel gear shaft104so as to idle. The fourth differential side bevel gear89is installed on the fourth differential side bevel gear shaft104so as not to idle.

The ring protrusion shaft10is provided in the form of a protrusion at an inner periphery of the ring6, and the ring pinion9is installed on the ring protrusion shaft10. The number of ring protrusion shafts10and the number of ring pinions9are not limited. The first ring double-sided gear2and the second ring double-sided gear12engage with two opposite sides of the ring pinion9.

The first planet gear3is installed on the first carrier5, and the second planet gear13is installed on the second carrier15. The number of planet gears3and13respectively installed on the carriers5and15is not limited. One side of the first planet gear3engages with the first sun gear31, and the other side of the first planet gear3engages with the first ring double-sided gear2. One side of the second planet gear13engages with the second sun double-sided gear11, and the other side of the second planet gear13engages with the second ring double-sided gear12.

Gear teeth are omitted without being illustrated. The gear teeth, which are omitted from the drawings, are gear teeth provided on outer portions of the first planet gear3, the second planet gear13, the ring pinion9, the fourth sun pinion87, and the fourth differential side bevel gear89, gear teeth provided on the portion of the outer portion of the first sun gear31engaging with the first planet gear3, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the second planet gear13, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the fourth sun pinion87, gear teeth provided on the portion of the inner portion of the first ring double-sided gear2engaging with the first planet gear3, gear teeth provided on the portion20of the outer portion of the first ring double-sided gear2engaging with the ring pinion9, gear teeth provided on the portion19of the inner portion of the second ring double-sided gear12engaging with the second planet gear13, and gear teeth provided on the portion of the outer portion of the second ring double-sided gear12engaging with the ring pinion9.

A relationship between the components, which idle, is implemented between the second sun double-sided gear11and the fourth sun carrier shaft84, between the shaft of the first carrier5and the first sun gear shaft34, between the shaft of the second carrier15and the fourth sun carrier shaft84, and between the fourth sun carrier shaft84and the fourth differential side bevel gear shaft104. A relationship between the components, which do not idle, is implemented between the first sun gear31and the first sun gear shaft34and between the fourth differential side bevel gear89and the fourth differential side bevel gear shaft104.

FIG.11briefly illustrates a cross-section of a nine-axis planetary gear device configured by assembling the first sun double-sided gear1, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the third sun carrier shaft74, the third sun pinion77, the third sun protrusion shaft78, a third differential side double-sided bevel gear80, the fourth sun carrier shaft84, the fourth sun pinion87, the fourth sun protrusion shaft88, a fourth differential side double-sided bevel gear90, a fifth sun carrier shaft114, a fifth sun pinion117, a fifth sun protrusion shaft118, a fifth differential side bevel gear119, a sixth sun carrier shaft124, a sixth sun pinion127, a sixth sun protrusion shaft128, a sixth differential side bevel gear129, a fifth differential side bevel gear shaft134, and a sixth differential side bevel gear shaft144.

The two carriers5and15are respectively illustrated as having hollow shafts, but the ring6is not illustrated as having a hollow shaft in the same way. The ring6has a gear formed on an outer portion thereof and implements gear connection. The ring6is omitted because a brake often operates together with a band, but the ring6is not a component that needs to be eliminated. As necessary, the ring6may be configured to have a hollow shaft.

FIG.12illustrates a cross-sectional view of one part of the disassembled nine-axis planetary gear device illustrated inFIG.11and illustrates a perspective view of another part of the disassembled nine-axis planetary gear device.

Two or more types of magnifications are used to illustrate the cross-sectional view inFIG.12. The third differential side double-sided bevel gear80and the fourth differential side double-sided bevel gear90are illustrated twice with different magnifications to easily recognize the third differential side double-sided bevel gear80and the fourth differential side double-sided bevel gear90from surrounding objects.

Based on the fifth sun carrier shaft114, the fifth sun pinion117, the fifth sun protrusion shaft118, the fifth differential side bevel gear119, the sixth sun carrier shaft124, the sixth sun pinion127, the sixth sun protrusion shaft128, the sixth differential side bevel gear129, the fifth differential side bevel gear shaft134, and the sixth differential side bevel gear shaft144, the first sun double-sided gear1, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring pinion9, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the third sun pinion77, and the fourth sun pinion87are to correspond to the same magnification when being expanded by 25%, and the ring6, the ring protrusion shaft10, the third sun carrier shaft74, the third sun protrusion shaft78, the fourth sun carrier shaft84, and the fourth sun protrusion shaft88are to correspond to the same magnification when being expanded by 13%.

The third differential side double-sided bevel gear80and the fourth differential side double-sided bevel gear90, which are illustrated twice, need to be shown with different magnifications, the third differential side double-sided bevel gear80adjacent to the fifth sun pinion117is to correspond to a reference magnification, the third differential side double-sided bevel gear80adjacent to the third sun pinion77needs to be expanded by 25%, the fourth differential side double-sided bevel gear90adjacent to the sixth sun pinion127is to correspond to the reference magnification, and the fourth differential side double-sided bevel gear90adjacent to the fourth sun pinion87needs to be expanded by 25%.

The fifth sun protrusion shaft118is provided in the form of a protrusion at a periphery of the fifth sun carrier shaft114, and the fifth sun pinion117is installed on the fifth sun protrusion shaft118. The number of fifth sun protrusion shafts118and the number of fifth sun pinions117are not limited.

The third sun protrusion shaft78is provided in the form of a protrusion at a periphery of the third sun carrier shaft74, and the third sun pinion77is installed on the third sun protrusion shaft78. The number of third sun protrusion shafts78and the number of third sun pinions77are not limited.

The first sun double-sided gear1and the third differential side double-sided bevel gear80engage with two opposite sides of the third sun pinion77. The third differential side double-sided bevel gear80and the fifth differential side bevel gear119engage with two opposite sides of the fifth sun pinion117. The first sun double-sided gear1is installed on the third sun carrier shaft74so as to idle. The third differential side double-sided bevel gear80and the third sun carrier shaft74are installed on the fifth sun carrier shaft114so as to idle. The fifth sun carrier shaft114is installed on the fifth differential side bevel gear shaft134so as to idle. The fifth differential side bevel gear119is installed on the fifth differential side bevel gear shaft134so as not to idle.

The sixth sun protrusion shaft128is provided in the form of a protrusion at a periphery of the sixth sun carrier shaft124, and the sixth sun pinion127is installed on the sixth sun protrusion shaft128. The number of sixth sun protrusion shafts128and the number of sixth sun pinions127are not limited.

The fourth sun protrusion shaft88is provided in the form of a protrusion at a periphery of the fourth sun carrier shaft84, and the fourth sun pinion87is installed on the fourth sun protrusion shaft88. The number of fourth sun protrusion shafts88and the number of fourth sun pinions87are not limited.

The second sun double-sided gear11and the fourth differential side double-sided bevel gear90engage with two opposite sides of the fourth sun pinion87. The fourth differential side double-sided bevel gear90and the sixth differential side bevel gear129engage with two opposite sides of the sixth sun pinion127. The second sun double-sided gear11is installed on the fourth sun carrier shaft84so as to idle. The fourth differential side double-sided bevel gear90and the fourth sun carrier shaft84are installed on the sixth sun carrier shaft124so as to idle. The sixth sun carrier shaft124is installed on the sixth differential side bevel gear shaft144so as to idle. The sixth differential side bevel gear129is installed on the sixth differential side bevel gear shaft144so as not to idle.

The ring protrusion shaft10is provided in the form of a protrusion at an inner periphery of the ring6, and the ring pinion9is installed on the ring protrusion shaft10. The number of ring protrusion shafts10and the number of ring pinions9are not limited. The first ring double-sided gear2and the second ring double-sided gear12engage with two opposite sides of the ring pinion9.

The first planet gear3is installed on the first carrier5, and the second planet gear13is installed on the second carrier15. The number of planet gears3and13respectively installed on the carriers5and15is not limited. One side of the first planet gear3engages with the first sun double-sided gear1, and the other side of the first planet gear3engages with the first ring double-sided gear2. One side of the second planet gear13engages with the second sun double-sided gear11, and the other side of the second planet gear13engages with the second ring double-sided gear12.

Gear teeth are omitted without being illustrated. The gear teeth, which are omitted from the drawings, are gear teeth provided on the outer portions of the first planet gear3, the second planet gear13, the ring pinion9, and the sun bevel gears77,87,117, and127, and the differential side bevel gears119and129, gear teeth provided on the portion of the third differential side double-sided bevel gear80engaging with the fifth sun pinion117, gear teeth provided on the portion of the third differential side double-sided bevel gear80engaging with the third sun pinion77, gear teeth provided on the portion of the fourth differential side double-sided bevel gear90engaging with the sixth sun pinion127, gear teeth provided on the portion of the fourth differential side double-sided bevel gear90engaging with the fourth sun pinion87, gear teeth provided on the portion of the fifth differential side bevel gear119engaging with the fifth sun pinion117, gear teeth provided on the portion of the sixth differential side bevel gear129engaging with the sixth sun pinion127, gear teeth provided on the portion17of the outer portion of the first sun double-sided gear1engaging with the first planet gear3, gear teeth provided on the portion18of the outer portion of the first sun double-sided gear1engaging with the fifth sun pinion117, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the second planet gear13, gear teeth provided on the portion of the outer portion of the second sun double-sided gear11engaging with the sixth sun pinion127, gear teeth provided on the portion of the inner portion of the first ring double-sided gear2engaging with the first planet gear3, gear teeth provided on the portion20of the outer portion of the first ring double-sided gear2engaging with the ring pinion9, gear teeth provided on the portion19of the inner portion of the second ring double-sided gear12engaging with the second planet gear13, and gear teeth provided on the portion of the outer portion of the second ring double-sided gear12engaging with the ring pinion9.

A relationship between the components, which idle, is implemented between the first sun double-sided gear1and the third sun carrier shaft74, between the second sun double-sided gear11and the fourth sun carrier shaft84, between the shaft of the first carrier5and the third sun carrier shaft74, between the shaft of the second carrier15and the fourth sun carrier shaft84, between the third differential side double-sided bevel gear80and the fifth sun carrier shaft114, between the fifth sun carrier shaft114and the fifth differential side bevel gear shaft134, between the fifth sun carrier shaft114and the third sun carrier shaft74, between the fourth differential side double-sided bevel gear90and the sixth sun carrier shaft124, between the sixth sun carrier shaft124and the sixth differential side bevel gear shaft144, and between the sixth sun carrier shaft124and the fourth sun carrier shaft84. A relationship between the components, which do not idle, is implemented between the fifth differential side bevel gear119and the fifth differential side bevel gear shaft134and between the sixth differential side bevel gear129and the sixth differential side bevel gear shaft144.

FIG.13briefly illustrates a cross-section of a five-axis planetary gear device that is a modified example ofFIG.3and configured by assembling the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second ring double-sided gear12, the second planet gear13, the second carrier15, the first sun gear31, the first sun gear shaft34, the second sun gear41, the second sun gear shaft44, a first carrier disc5d, a first carrier ring5r, a first carrier shaft5s, a first carrier wheel5w, a ring disc6d, a ring carrier shaft6s, a second carrier disc15d, a second carrier ring15r, a second carrier shaft15s, a second carrier wheel15w, a first sun gear ring31r, a first sun gear wheel31w, a second sun gear ring41r, and a second sun gear wheel41w.

The first carrier shaft5s, the ring carrier shaft6s, the second carrier shaft15s, the first sun gear shaft34, and the second sun gear shaft44are concentric hollow shafts. However, the first carrier shaft5sand the first sun gear shaft34are not limited to the hollow shaft.

The first carrier disc5d, the ring disc6d, and the second carrier disc15deach have a circular plate shape and serve to transmit power between the first carrier5, the ring6, and the second carrier15and the first carrier shaft5s, the ring carrier shaft6s, and the second carrier shaft15s.

The first carrier ring5r, the second carrier ring15r, the first sun gear ring31r, the second sun gear ring41r, and the ring6provide a space exposed to the outside and used to install the brake and are respectively connected to the first carrier5, the second carrier15, the first sun gear shaft34, the second sun gear shaft44, and the ring carrier shaft6sthrough the first carrier wheel5w, the second carrier wheel15w, the first sun gear wheel31w, the second sun gear wheel41w, and the ring disc6d.

FIG.14briefly illustrates a cross-section of a four-axis planetary gear device that is a modified example ofFIG.13and configured by assembling the first planet gear3, the first carrier5, the second planet gear13, the second carrier15, the first sun gear31, the first sun gear shaft34, the second sun gear41, the second sun gear shaft44, the first carrier disc5d, the first carrier ring5r, the first carrier shaft5s, the first carrier wheel5w, the second carrier disc15d, the second carrier ring15r, the second carrier shaft15s, the second carrier wheel15w, the first sun gear ring31r, the first sun gear wheel31w, the second sun gear ring41r, the second sun gear wheel41w, and a ring double-sided gear152.

The ring double-sided gear152has a configuration identical to a configuration in which ring gears of two planetary gear devices are integrated. The ring double-sided gear152has gear teeth so that the planet gears3and13engage with two opposite sides of the ring double-sided gear152. However, the gear teeth are omitted without being illustrated in the drawings.

FIG.15illustrates a modified example ofFIG.14in which two shafts are disposed at two opposite sides.

FIG.16briefly illustrates a cross-section of a seven-axis planetary gear device that is a modified example ofFIG.7and configured by assembling the first sun double-sided gear1, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the third sun carrier shaft74, the third sun pinion77, the third sun protrusion shaft78, the third differential side bevel gear79, the fourth sun carrier shaft84, the fourth sun pinion87, the fourth sun protrusion shaft88, the fourth differential side bevel gear89, the third differential side bevel gear shaft94, the fourth differential side bevel gear shaft104, a first carrier cylinder5c, the first carrier disc5d, the first carrier ring5r, the first carrier shaft5s, the first carrier wheel5w, a second carrier cylinder15c, the second carrier disc15d, the second carrier ring15r, the second carrier shaft15s, the second carrier wheel15w, a third sun carrier shaft cylinder74c, a third sun carrier shaft disc74d, a third sun carrier shaft ring74r, a third sun carrier shaft driving shaft74s, a third sun carrier shaft wheel74w, a fourth sun carrier shaft cylinder84c, a fourth sun carrier shaft disc84d, a fourth sun carrier shaft ring84r, a fourth sun carrier shaft driving shaft84s, a fourth sun carrier shaft wheel84w, a third differential side bevel gear shaft ring94r, a third differential side bevel gear shaft wheel94w, a fourth differential side bevel gear shaft ring104r, and a fourth differential side bevel gear shaft wheel104w.

The first carrier shaft5s, the ring carrier shaft6s, the second carrier shaft15s, the third sun carrier shaft74, the fourth sun carrier shaft84, the fourth sun carrier shaft driving shaft84s, and the fourth differential side bevel gear shaft104are concentric hollow shafts.

The first carrier disc5d, the ring disc6d, the second carrier disc15d, the third sun carrier shaft disc74d, and the fourth sun carrier shaft disc84deach have a circular plate shape, and the first carrier cylinder5c, the second carrier cylinder15c, the third sun carrier shaft cylinder74c, and the fourth sun carrier shaft cylinder84ceach have a cylindrical shape. Power is transmitted to the ring6from the first carrier shaft5sthrough the first carrier disc5dand the first carrier cylinder5c, from the first carrier5and the second carrier shaft15sthrough the second carrier disc15dand the second carrier cylinder15c, from the second carrier15and the third sun carrier shaft driving shaft74sthrough the third sun carrier shaft disc74d, the third sun carrier shaft cylinder74c, and the third sun protrusion shaft78, from the third sun carrier shaft74and the fourth sun carrier shaft driving shaft84sthrough the fourth sun carrier shaft disc84d, the fourth sun carrier shaft cylinder84c, and the fourth sun protrusion shaft88, from the fourth sun carrier shaft84and the third differential side bevel gear shaft94, from the third differential side bevel gear79and the fourth differential side bevel gear shaft104, and from the fourth differential side bevel gear89and the ring carrier shaft6sthrough the ring disc6dand the ring protrusion shaft10.

The first carrier wheel5w, the second carrier wheel15w, the third sun carrier shaft wheel74w, the fourth sun carrier shaft wheel84w, the third differential side bevel gear shaft wheel94w, and the fourth differential side bevel gear shaft wheel104weach have a circular plate shape. The first carrier ring5r, the second carrier ring15r, the third sun carrier shaft ring74r, the fourth sun carrier shaft ring84r, the third differential side bevel gear shaft ring94r, the fourth differential side bevel gear shaft ring104r, and the ring6are exposed to the outside and provide the space in which the brake may be installed. The first carrier ring5ris connected to the ring carrier shaft6sthrough the first carrier wheel5w. The first carrier5and the second carrier ring15rare connected to the ring carrier shaft6sthrough the second carrier wheel15w. The second carrier15and the third sun carrier shaft ring74rare connected to the ring carrier shaft6sthrough the third sun carrier shaft wheel74w. The third sun carrier shaft74and the fourth sun carrier shaft ring84rare connected to the ring carrier shaft6sthrough the fourth sun carrier shaft wheel84w. The fourth sun carrier shaft84and the third differential side bevel gear shaft ring94rare connected to the ring carrier shaft6sthrough the third differential side bevel gear shaft wheel94w. The third differential side bevel gear shaft94and the fourth differential side bevel gear shaft ring104rare connected to the ring carrier shaft6sthrough the fourth differential side bevel gear shaft wheel104w. The fourth differential side bevel gear shaft104and the ring6are connected to the ring carrier shaft6sthrough the ring protrusion shaft10and the ring disc6d.

FIG.17briefly illustrates a cross-section of a six-axis planetary gear device that is a modified example ofFIG.9and configured by assembling the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the first sun gear31, the first sun gear shaft34, the fourth sun carrier shaft84, the fourth sun pinion87, the fourth sun protrusion shaft88, the fourth differential side bevel gear89, the fourth differential side bevel gear shaft104, the first carrier cylinder5c, the first carrier disc5d, the first carrier ring5r, the first carrier shaft5s, the first carrier wheel5w, the ring disc6d, the ring carrier shaft6s, the second carrier cylinder15c, the second carrier disc15d, the second carrier ring15r, the second carrier shaft15s, the second carrier wheel15w, the first sun gear ring31r, the first sun gear wheel31w, the fourth sun carrier shaft cylinder84c, the fourth sun carrier shaft disc84d, the fourth sun carrier shaft ring84r, the fourth sun carrier shaft driving shaft84s, the fourth sun carrier shaft wheel84w, the fourth differential side bevel gear shaft ring104r, and the fourth differential side bevel gear shaft wheel104w.

The ring carrier shaft6s, the second carrier shaft15s, the fourth sun carrier shaft driving shaft84s, and the fourth differential side bevel gear shaft104are concentric hollow shafts. However, if necessary, the first carrier shaft5sand the first sun gear shaft34may also be hollow shafts, or the arrangements of the shafts in a leftward/rightward direction may be changed.

The first carrier disc5d, the ring disc6d, the second carrier disc15d, and the fourth sun carrier shaft disc84deach have a circular plate shape, and the first carrier cylinder5c, the second carrier cylinder15c, and the fourth sun carrier shaft cylinder84ceach have a cylindrical shape. Power is transmitted to the ring6from the first carrier shaft5sthrough the first carrier disc5dand the first carrier cylinder5c, from the first carrier5and the second carrier shaft15sthrough the second carrier disc15dand the second carrier cylinder15c, from the second carrier15and the fourth sun carrier shaft driving shaft84sthrough the fourth sun carrier shaft disc84d, the fourth sun carrier shaft cylinder84c, and the fourth sun protrusion shaft88, from the fourth sun carrier shaft84and the fourth differential side bevel gear shaft104, from the fourth differential side bevel gear89and the first sun gear shaft34, and from the first sun gear31and the ring carrier shaft6sthrough the ring disc6dand the ring protrusion shaft10.

The first carrier wheel5w, the second carrier wheel15w, the first sun gear wheel31w, the fourth sun carrier shaft wheel84w, and the fourth differential side bevel gear shaft wheel104weach have a circular plate shape. The first carrier ring5r, the second carrier ring15r, the first sun gear ring31r, the fourth sun carrier shaft ring84r, the fourth differential side bevel gear shaft ring104r, and the ring6are exposed to the outside and provide the space in which the brake may be installed. The first carrier ring5ris connected to the ring carrier shaft6sthrough the first carrier wheel5w. The first carrier5and the second carrier ring15rare connected to the ring carrier shaft6sthrough the second carrier wheel15w. The second carrier15and the fourth sun carrier shaft ring84rare connected to the ring carrier shaft6sthrough the fourth sun carrier shaft wheel84w. The fourth sun carrier shaft84and the fourth differential side bevel gear shaft ring104rare connected to the ring carrier shaft6sthrough the fourth differential side bevel gear shaft wheel104w. The fourth differential side bevel gear shaft104and the first sun gear ring31rare connected to the ring carrier shaft6sthrough the first sun gear wheel31w. The first sun gear shaft34and the ring6are connected to the ring carrier shaft6sthrough the ring protrusion shaft and the ring disc6d.

FIG.18briefly illustrates a cross-section of an eight-axis planetary gear device configured by assembling the first sun double-sided gear1, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the third sun carrier shaft74, the third sun pinion77, the third sun protrusion shaft78, the third differential side double-sided bevel gear79, the fourth sun carrier shaft84, the fourth sun pinion87, the fourth sun protrusion shaft88, the fourth differential side double-sided bevel gear90, the sixth sun carrier shaft124, the sixth sun pinion127, the sixth sun protrusion shaft128, the sixth differential side bevel gear129, the third differential side bevel gear shaft94, and the sixth differential side bevel gear shaft144.

As necessary, the ring6may be configured to have a hollow shaft.

The structure inFIG.18may be recognized with reference to the descriptions inFIGS.11,12, and7. Therefore, the repeated detailed description will be omitted.

FIG.19briefly illustrates a cross-section of a nine-axis planetary gear device that is a modified example ofFIG.11and configured by assembling the first sun double-sided gear1, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the third sun carrier shaft74, the third sun pinion77, the third sun protrusion shaft78, the third differential side double-sided bevel gear80, the fourth sun carrier shaft84, the fourth sun pinion87, the fourth sun protrusion shaft88, the fourth differential side double-sided bevel gear90, the fifth sun carrier shaft114, the fifth sun pinion117, the fifth sun protrusion shaft118, the fifth differential side bevel gear119, the sixth sun carrier shaft124, the sixth sun pinion127, the sixth sun protrusion shaft128, the sixth differential side bevel gear129, the fifth differential side bevel gear shaft134, the sixth differential side bevel gear shaft144, the first carrier cylinder5c, the first carrier disc5d, the first carrier ring5r, the first carrier shaft5s, the first carrier wheel5w, the second carrier cylinder15c, the second carrier disc15d, the second carrier ring15r, the second carrier shaft15s, the second carrier wheel15w, the ring disc6d, the ring carrier shaft6s, the third sun carrier shaft cylinder74c, the third sun carrier shaft disc74d, the third sun carrier shaft ring74r, the third sun carrier shaft driving shaft74s, the third sun carrier shaft wheel74w, the fourth sun carrier shaft cylinder84c, the fourth sun carrier shaft disc84d, the fourth sun carrier shaft ring84r, the fourth sun carrier shaft driving shaft84s, the fourth sun carrier shaft wheel84w, a fifth sun carrier shaft cylinder114c, a fifth sun carrier shaft disc114d, a fifth sun carrier shaft ring114r, a fifth sun carrier shaft driving shaft114s, a fifth sun carrier shaft wheel114w, a sixth sun carrier shaft cylinder124c, a sixth sun carrier shaft disc124d, a sixth sun carrier shaft ring124r, a sixth sun carrier shaft driving shaft124s, a sixth sun carrier shaft wheel124w, a fifth differential side bevel gear shaft ring134r, a fifth differential side bevel gear shaft wheel134w, a sixth differential side bevel gear shaft ring144r, and a sixth differential side bevel gear shaft wheel144w.

The second carrier shaft15s, the third sun carrier shaft74, the third sun carrier shaft driving shaft74s, the fifth sun carrier shaft114, the fifth sun carrier shaft driving shaft114s, the fifth differential side bevel gear shaft134, the fourth sun carrier shaft84, the fourth sun carrier shaft driving shaft84s, the sixth sun carrier shaft124, the sixth sun carrier shaft driving shaft124s, and the sixth differential side bevel gear shaft144are concentric hollow shafts.

The first carrier disc5d, the ring disc6d, the second carrier disc15d, the third sun carrier shaft disc74d, the fourth sun carrier shaft disc84d, the fifth sun carrier shaft disc114d, and the sixth sun carrier shaft disc124deach have a circular plate shape, and the first carrier cylinder5c, the second carrier cylinder15c, the third sun carrier shaft cylinder74c, the fourth sun carrier shaft cylinder84c, the fifth sun carrier shaft cylinder114c, and the sixth sun carrier shaft cylinder124ceach have a cylindrical shape.

Power is transmitted to the ring6from the first carrier shaft5sthrough the first carrier disc5dand the first carrier cylinder5c, from the first carrier5and the second carrier shaft15sthrough the second carrier disc15dand the second carrier cylinder15c, from the second carrier15and the third sun carrier shaft driving shaft74sthrough the third sun carrier shaft disc74d, the third sun carrier shaft cylinder74c, and the third sun protrusion shaft78, from the third sun carrier shaft74and the fourth sun carrier shaft driving shaft84sthrough the fourth sun carrier shaft disc84d, the fourth sun carrier shaft cylinder84c, and the fourth sun protrusion shaft88, from the fourth sun carrier shaft84and the fifth sun carrier shaft driving shaft114sthrough the fifth sun carrier shaft disc114d, the fifth sun carrier shaft cylinder114c, and the fifth sun protrusion shaft118, from the fifth sun carrier shaft114and the sixth sun carrier shaft driving shaft124sthrough the sixth sun carrier shaft disc124d, the sixth sun carrier shaft cylinder124c, and the sixth sun protrusion shaft128, from the sixth sun carrier shaft124and the fifth differential side bevel gear shaft134, from the fifth differential side bevel gear119and the sixth differential side bevel gear shaft144, and from the sixth differential side bevel gear129and the ring carrier shaft6sthrough the ring disc6dand the ring protrusion shaft10.

The first carrier wheel5w, the second carrier wheel15w, the third sun carrier shaft wheel74w, the fourth sun carrier shaft wheel84w, the fifth sun carrier shaft wheel114w, the sixth sun carrier shaft wheel124w, the fifth differential side bevel gear shaft wheel134w, and the sixth differential side bevel gear shaft wheel144weach have a circular plate shape. The first carrier ring5r, the second carrier ring15r, the third sun carrier shaft ring74r, the fourth sun carrier shaft ring84r, the fifth sun carrier shaft ring114r, the sixth sun carrier shaft ring124r, the fifth differential side bevel gear shaft ring134r, the sixth differential side bevel gear shaft ring144r, and the ring6are exposed to the outside and provide the space in which the brake may be installed. The first carrier ring5ris connected to the ring carrier shaft6sthrough the first carrier wheel5w. The first carrier5and the second carrier ring15rare connected to the ring carrier shaft6sthrough the second carrier wheel15w. The second carrier15and the third sun carrier shaft ring74rare connected to the ring carrier shaft6sthrough the third sun carrier shaft wheel74w. The third sun carrier shaft74and the fourth sun carrier shaft ring84rare connected to the ring carrier shaft6sthrough the fourth sun carrier shaft wheel84w. The fourth sun carrier shaft84and the fifth sun carrier shaft ring114rare connected to the ring carrier shaft6sthrough the fifth sun carrier shaft wheel114w. The fifth sun carrier shaft114and the sixth sun carrier shaft ring124rare connected to the ring carrier shaft6sthrough the sixth sun carrier shaft wheel124w. The sixth sun carrier shaft124and the fifth differential side bevel gear shaft ring134rare connected to the ring carrier shaft6sthrough the fifth differential side bevel gear shaft wheel134w. The fifth differential side bevel gear shaft134and the sixth differential side bevel gear shaft ring144rare connected to the ring carrier shaft6sthrough the sixth differential side bevel gear shaft wheel144w. The sixth differential side bevel gear shaft144and the ring6are connected to the ring carrier shaft6sthrough the ring protrusion shaft10and the ring disc6d.

FIG.20briefly illustrates a cross-section of an eight-axis planetary gear device that is a modified example ofFIG.18and configured by assembling the first sun double-sided gear1, the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second sun double-sided gear11, the second ring double-sided gear12, the second planet gear13, the second carrier15, the third sun carrier shaft74, the third sun pinion77, the third sun protrusion shaft78, the third differential side bevel gear79, the fourth sun carrier shaft84, the fourth sun pinion87, the fourth sun protrusion shaft88, the fourth differential side double-sided bevel gear90, the third differential side bevel gear shaft94, the sixth sun carrier shaft124, the sixth sun pinion127, the sixth sun protrusion shaft128, the sixth differential side bevel gear129, the sixth differential side bevel gear shaft144, the first carrier cylinder5c, the first carrier disc5d, the first carrier ring5r, the first carrier shaft5s, the first carrier wheel5w, the second carrier cylinder15c, the second carrier disc15d, the second carrier ring15r, the second carrier shaft15s, the second carrier wheel15w, the ring disc6d, the ring carrier shaft6s, the third sun carrier shaft cylinder74c, the third sun carrier shaft disc74d, the third sun carrier shaft ring74r, the third sun carrier shaft driving shaft74s, the third sun carrier shaft wheel74w, the fourth sun carrier shaft cylinder84c, the fourth sun carrier shaft disc84d, the fourth sun carrier shaft ring84r, the fourth sun carrier shaft driving shaft84s, the fourth sun carrier shaft wheel84w, the third differential side bevel gear shaft ring94r, the third differential side bevel gear shaft wheel94w, the sixth sun carrier shaft cylinder124c, the sixth sun carrier shaft disc124d, the sixth sun carrier shaft ring124r, the sixth sun carrier shaft driving shaft124s, the sixth sun carrier shaft wheel124w, the sixth differential side bevel gear shaft ring144r, and the sixth differential side bevel gear shaft wheel144w.

The second carrier shaft15s, the third sun carrier shaft74, the third sun carrier shaft driving shaft74s, the fourth sun carrier shaft84, the fourth sun carrier shaft driving shaft84s, the third differential side bevel gear shaft94, the sixth sun carrier shaft124, the sixth sun carrier shaft driving shaft124s, and the sixth differential side bevel gear shaft144are concentric hollow shaft.

The first carrier disc5d, the ring disc6d, the second carrier disc15d, the third sun carrier shaft disc74d, the fourth sun carrier shaft disc84d, and the sixth sun carrier shaft disc124deach have a circular plate shape, and the first carrier cylinder5c, the second carrier cylinder15c, the third sun carrier shaft cylinder74c, the fourth sun carrier shaft cylinder84c, and the sixth sun carrier shaft cylinder124ceach have a cylindrical shape.

Power is transmitted to the ring6from the first carrier shaft5sthrough the first carrier disc5dand the first carrier cylinder5c, from the first carrier5and the second carrier shaft15sthrough the second carrier disc15dand the second carrier cylinder15c, from the second carrier15and the third sun carrier shaft driving shaft74sthrough the third sun carrier shaft disc74d, the third sun carrier shaft cylinder74c, and the third sun protrusion shaft78, from the third sun carrier shaft74and the fourth sun carrier shaft driving shaft84sthrough the fourth sun carrier shaft disc84d, the fourth sun carrier shaft cylinder84c, and the fourth sun protrusion shaft88, from the fourth sun carrier shaft84and the third differential side bevel gear shaft94, from the third differential side bevel gear79and the sixth sun carrier shaft driving shaft124sthrough the sixth sun carrier shaft disc124d, the sixth sun carrier shaft cylinder124c, and the sixth sun protrusion shaft128, from the sixth sun carrier shaft124and the sixth differential side bevel gear shaft144, and from the sixth differential side bevel gear129and the ring carrier shaft6sthrough the ring disc6dand the ring protrusion shaft10.

The first carrier wheel5w, the second carrier wheel15w, the third sun carrier shaft wheel74w, the fourth sun carrier shaft wheel84w, the third differential side bevel gear shaft wheel94w, the sixth sun carrier shaft wheel124w, and the sixth differential side bevel gear shaft wheel144weach have a circular plate shape. The first carrier ring5r, the second carrier ring15r, the third sun carrier shaft ring74r, the fourth sun carrier shaft ring84r, the third differential side bevel gear shaft ring94r, the sixth sun carrier shaft ring124r, the sixth differential side bevel gear shaft ring144r, and the ring6are exposed to the outside and provide the space in which the brake may be installed. The first carrier ring5ris connected to the ring carrier shaft6sthrough the first carrier wheel5w. The first carrier5and the second carrier ring15rare connected to the ring carrier shaft6sthrough the second carrier wheel15w. The second carrier15and the third sun carrier shaft ring74rare connected to the ring carrier shaft6sthrough the third sun carrier shaft wheel74w. The third sun carrier shaft74and the fourth sun carrier shaft ring84rare connected to the ring carrier shaft6sthrough the fourth sun carrier shaft wheel84w. The fourth sun carrier shaft84and the third differential side bevel gear shaft ring94rare connected to the ring carrier shaft6sthrough the third differential side bevel gear shaft wheel94w. The third differential side bevel gear shaft94and the sixth sun carrier shaft ring124rare connected to the ring carrier shaft6sthrough the sixth sun carrier shaft wheel124w. The sixth sun carrier shaft124and the sixth differential side bevel gear shaft ring144rare connected to the ring carrier shaft6sthrough the sixth differential side bevel gear shaft wheel144w. The sixth differential side bevel gear shaft144and the ring6are connected to the ring carrier shaft6sthrough the ring protrusion shaft10and the ring disc6d.

The specific contents of the present invention will be described in detail with reference to the embodiment of the present invention illustrated in the accompanying drawings. However, the present invention is not limited to the contents illustrated in the drawings.

FIGS.1and2are views illustrating a four-axis planetary gear device according to the present invention. The first planet gear3and the second planet gear13respectively rotate about the first carrier5and the second carrier15and revolve around the sun carrier shaft4. The sun pinion7and the ring pinion9respectively rotate about the sun protrusion shaft8and the ring protrusion shaft10and revolve around the sun carrier shaft4.

Four shafts, which are connected to one another and operated in an apparatus, are provided as the shaft of the first carrier5, the shaft of the second carrier15, the sun carrier shaft4, and the shaft of the ring6. A hollow shaft may be made and used for the ring6, or the ring6may be used through external direct contact without a hollow shaft. Therefore, the shaft is not illustrated.

It can be seen that the apparatus inFIGS.1and2includes four planetary gear devices.

Two planetary gear devices are provided which include a planetary gear device in which the first sun double-sided gear1, the first planet gear3, and the first ring double-sided gear2are respectively used as a sun gear, a planet gear, and a ring gear, and a planetary gear device in which the second sun double-sided gear11, the second planet gear13, and the second ring double-sided gear12are respectively used as a sun gear, a planet gear, and a ring gear. Further, two differential gear devices are provided which include a differential gear device in which the first sun double-sided gear1and the second sun double-sided gear11are used as differential side gears, the sun pinion7is used as a differential pinion, and the sun carrier shaft4is used as a differential carrier, and a differential gear device in which the first ring double-sided gear2and the second ring double-sided gear12are used as differential side gears, the ring pinion9is used as a differential pinion, and the ring6is used as a differential carrier. In this case, the former differential gear device having the differential carrier provided at the rotation center will be referred to as a ‘sun differential gear device’, and the later differential gear device having the differential carrier provided at the rotation circumference will be referred to as a ‘ring differential gear device’.

The first sun double-sided gear1, the second sun double-sided gear11, the first ring double-sided gear2, and the second ring double-sided gear12respectively have the gears used for the two planetary gear devices and the gears used for the two differential gear devices and are integrated into a single configuration to implement connection between the two planetary gear devices and the two differential gear devices. In other words, the two sun gears of the two planetary gear devices and the two differential side gears of the sun differential gear device are integrated into a single configuration, and the two ring gears of the two planetary gear devices and the two differential side gears of the ring differential gear device are integrated into a single configuration.

It can be seen that in case that any one of the four shafts is configured as an output shaft, and the remaining shafts are configured as input shafts, very various gear shift ratios may be obtained from the four-axis planetary gear device by selecting an operation of transmitting a rotational force to the input shafts or braking the input shafts. However, the number of output shafts is not limited to one. Further, one shaft may be configured as an output shaft or an input shaft. The rotational forces may be merged or distributed between the plurality of shafts.

FIGS.3and4are views illustrating a five-axis planetary gear device according to the present invention. In comparison with the apparatus illustrated inFIGS.1and2, the sun pinion7and the sun protrusion shaft8are excluded, and the sun carrier shaft4is divided into two shafts, i.e., the first sun gear shaft34and the second sun gear shaft44. The shapes of the first sun double-sided gear1and the second sun double-sided gear11illustrated inFIGS.1and2are simplified, like the shapes of the first sun gear31and the second sun gear41. As a result, the first sun gear shaft34and the second sun gear shaft44may rotate independently of each other.

Five shafts, which are connected to one another and operated in the apparatus, are provided as the shaft of the first carrier5, the shaft of the second carrier15, the shaft of the ring6, the first sun gear shaft34, and the second sun gear shaft44. A hollow shaft may be made and used for the ring6, or the ring6may be used through external direct contact without a hollow shaft. Therefore, the shaft is not illustrated.

It can be seen that the apparatus inFIGS.3and4includes three planetary gear devices.

Two planetary gear devices are provided which include a planetary gear device in which the first sun gear31, the first planet gear3, and the first ring double-sided gear2are respectively used as a sun gear, a planet gear, and a ring gear, and a planetary gear device in which the second sun gear41, the second planet gear13, and the second ring double-sided gear12are respectively used as a sun gear, a planet gear, and a ring gear. Further, there is a ring differential gear device in which the first ring double-sided gear2and the second ring double-sided gear12are used as differential side gears, the ring pinion9is used as a differential pinion, and the ring6is used as a differential carrier.

The first ring double-sided gear2and the second ring double-sided gear12respectively have the gears used for the two planetary gear devices and the gears used for the ring differential gear device and are integrated into a single configuration to implement connection between the two planetary gear devices and the ring differential gear device. In other words, the two ring gears of the two planetary gear devices and the two differential side gears of the ring differential gear device are integrated into a single configuration.

It can be seen that in case that any one of the five shafts is configured as an output shaft, and the remaining shafts are configured as input shafts, very various gear shift ratios may be obtained from the five-axis planetary gear device by selecting an operation of transmitting a rotational force to the input shafts or braking the input shafts. However, the number of output shafts is not limited to one. Further, one shaft may be configured as an output shaft or an input shaft. The rotational forces may be merged or distributed between the plurality of shafts. In addition, any one of or both the first ring double-sided gear2and the second ring double-sided gear12are braked, the planetary gear device including the first sun gear shaft34and the planetary gear device including the second sun gear shaft44are separated from each other and operated independently. For example, when the first ring double-sided gear2is braked, the shaft of the first carrier5and the first sun gear shaft34may each be a kind of reduction gear, and the second sun gear shaft44, the shaft of the second carrier15, and the shaft of the ring6constitute the single three-axis planetary gear device. When both the first ring double-sided gear2and the second ring double-sided gear12are braked, the two reduction gears may be implemented.

A modified example ofFIGS.3and4is illustrated inFIGS.13to15. The modification ensures the space in which the brake may be installed.

FIGS.5and6are views illustrating another five-axis planetary gear device according to the present invention. The ring pinion9, the ring protrusion shaft10, and the ring6illustrated inFIGS.1and2are excluded. The shapes of the first ring double-sided gear2and the second ring double-sided gear12are simplified, like the first ring gear52and the second ring gear62illustrated inFIGS.5and6. As a result, the first ring gear52and the second ring gear62may rotate independently of each other.

Five shafts, which are connected to one another and operated in the apparatus, are provided as the shaft of the first carrier5, the shaft of the second carrier15, the sun carrier shaft4, the shaft of the first ring gear52, and the shaft of the second ring gear62. Hollow shafts may be made and used for the first ring gear52and the second ring gear62, or the ring gears52and62may be used through external direct contact without a hollow shaft. Therefore, the shaft is not illustrated.

It can be seen that the apparatus inFIGS.5and6includes three planetary gear devices.

Two planetary gear devices are provided which include a planetary gear device in which the first sun double-sided gear1, the first planet gear3, and the first ring gear52are respectively used as a sun gear, a planet gear, and a ring gear, and a planetary gear device in which the second sun double-sided gear11, the second planet gear13, and the second ring gear62are respectively used as a sun gear, a planet gear, and a ring gear. Further, there is a sun differential gear device in which the first sun double-sided gear1and the second sun double-sided gear11are used as differential side gears, the sun pinion7is used as a differential pinion, and the sun carrier shaft4is used as a differential carrier.

The first sun double-sided gear1and the second sun double-sided gear11respectively have the gears used for the two planetary gear devices and the gears used for the sun differential gear device and are integrated into a single configuration to implement connection the two planetary gear devices and the sun differential gear device. In other words, the two sun gears of the two planetary gear devices and the two differential side gears of the sun differential gear device are integrated into a single configuration.

It can be seen that in case that any one of the five shafts is configured as an output shaft, and the remaining shafts are configured as input shafts, very various gear shift ratios may be obtained from the five-axis planetary gear device by selecting an operation of transmitting a rotational force to the input shafts or braking the input shafts. However, the number of output shafts is not limited to one. Further, one shaft may be configured as an output shaft or an input shaft. The rotational forces may be merged or distributed between the plurality of shafts.

FIGS.7and8are views illustrating a seven-axis planetary gear device according to the present invention. The third sun carrier shaft74, the third sun protrusion shaft78, the third sun pinion77, the third differential side bevel gear79, the third differential side bevel gear shaft94, the fourth sun carrier shaft84, the fourth sun protrusion shaft88, the fourth sun pinion87, the fourth differential side bevel gear89, and the fourth differential side bevel gear shaft104are used in a state in which the sun carrier shaft4, the sun protrusion shaft8, and the sun pinion7, which are provided in the apparatus illustrated inFIGS.1and2, are respectively disposed at left and right sides.

Seven shafts, which are connected to one another and operated in the apparatus, are provided as the shaft of the first carrier5, the shaft of the second carrier15, the shaft of the ring6, the third sun carrier shaft74, the fourth sun carrier shaft84, the third differential side bevel gear shaft94, and the fourth differential side bevel gear shaft104. A hollow shaft may be made and used for the ring6, or the ring6may be used through external direct contact without a hollow shaft. Therefore, the shaft is not illustrated.

It can be seen that the apparatus inFIGS.7and8includes five planetary gear devices.

Two planetary gear devices are provided which include a planetary gear device in which the first sun double-sided gear1, the first planet gear3, and the first ring double-sided gear2are respectively used as a sun gear, a planet gear, and a ring gear, and a planetary gear device in which the second sun double-sided gear11, the second planet gear13, and the second ring double-sided gear12are respectively used as a sun gear, a planet gear, and a ring gear. Further, three differential gear devices are provided which include a sun differential gear device in which the first sun double-sided gear1and the third differential side bevel gear79are used as differential side gears, the third sun pinion77is used as a differential pinion, and the third sun carrier shaft74is used as a differential carrier, a sun differential gear device in which the second sun double-sided gear11and the fourth differential side bevel gear89are used as differential side gears, the fourth sun pinion87is used as a differential pinion, and the fourth sun carrier shaft84is used as a differential carrier, and a ring differential gear device in which the first ring double-sided gear2and the second ring double-sided gear12are used as differential side gears, the ring pinion9is used as a differential pinion, and the ring6is used as a differential carrier.

The first sun double-sided gear1, the second sun double-sided gear11, the first ring double-sided gear2, and the second ring double-sided gear12respectively have the gears used for the two planetary gear devices and the gears used for the three differential gear devices and are integrated with a single configuration to implement connection between the two planetary gear devices and the three differential gear devices. In other words, the two ring gears of the two planetary gear devices and the two differential side gears of the ring differential gear device are integrated into a single configuration, and the two sun gears of the two planetary gear devices and any one of the two differential side gears of each of the two sun differential gear devices are integrated into a single configuration.

In other words, it can be seen that the apparatus illustrated inFIGS.3and4further includes the two sun differential gear devices, such that the two sun gears of the two planetary gear devices and any one of the two differential side gears of each of the further included two sun differential gear devices are integrated into a single configuration.

It can be seen that in case that any one of the seven shafts is configured as an output shaft, and the remaining shafts are configured as input shafts, very various gear shift ratios may be obtained from the seven-axis planetary gear device by selecting an operation of transmitting a rotational force to the input shafts or braking the input shafts. However, the number of output shafts is not limited to one. Further, one shaft may be configured as an output shaft or an input shaft. The rotational forces may be merged or distributed between the plurality of shafts. In addition, when any one of or both the first ring double-sided gear2and the second ring double-sided gear12are braked, the planetary gear device including the third differential side bevel gear shaft94and the planetary gear device including the fourth differential side bevel gear shaft104are separated from each other and operated independently. For example, when the first ring double-sided gear2is braked, the third differential side bevel gear shaft94, the third sun carrier shaft74, and the shaft of the first carrier5constitute the single three-axis planetary gear device, and the fourth differential side bevel gear shaft104, the fourth sun carrier shaft84, the shaft of the second carrier15, and the shaft of the ring6constitute the single four-axis planetary gear device. When the first ring double-sided gear2and the second ring double-sided gear12are simultaneously braked, the two three-axis planetary gear devices are implemented.

A modified example ofFIGS.7and8is illustrated inFIGS.13to16. The modification ensures the space in which the brake may be installed.

FIGS.9and10are views illustrating a six-axis planetary gear device according to the present invention that is a modification made by applying half of eccentric configurations inFIGS.3and7. The common components inFIGS.3and7, i.e., the first ring double-sided gear2, the first planet gear3, the first carrier5, the ring6, the ring pinion9, the ring protrusion shaft10, the second ring double-sided gear12, the second planet gear13, and the second carrier15are adopted and used. The first sun gear31and the first sun gear shaft34inFIG.3are adopted and used. The second sun double-sided gear11, the fourth sun carrier shaft84, the fourth sun protrusion shaft88, the fourth sun pinion87, the fourth differential side bevel gear89, and the fourth differential side bevel gear shaft104inFIG.7are adopted and used.

Six shafts, which are connected to one another and operated in the apparatus, are provided as the shaft of the first carrier5, the shaft of the second carrier15, the shaft of the ring6, the first sun gear shaft34, the fourth sun carrier shaft84, and the fourth differential side bevel gear shaft104. A hollow shaft may be made and used for the ring6, or the ring6may be used through external direct contact without a hollow shaft. Therefore, the shaft is not illustrated.

It can be seen that the apparatus inFIGS.9and10includes four planetary gear devices.

Two planetary gear devices are provided which include a planetary gear device in which the first sun gear31, the first planet gear3, and the first ring double-sided gear2are respectively used as a sun gear, a planet gear, and a ring gear, and a planetary gear device in which the second sun double-sided gear11, the second planet gear13, and the second ring double-sided gear12are respectively used as a sun gear, a planet gear, and a ring gear. Two differential gear devices are provided which include a sun differential gear device in which the second sun double-sided gear11and the fourth differential side bevel gear89are used as differential side gears, the fourth sun pinion87is used as a differential pinion, and the fourth sun carrier shaft84is used as a differential carrier, and a ring differential gear device in which the first ring double-sided gear2and the second ring double-sided gear12are used as differential side gears, the ring pinion9is used as a differential pinion, and the ring6is used as a differential carrier.

The second sun double-sided gear11, the first ring double-sided gear2, and the second ring double-sided gear12respectively have the gears used for the two planetary gear devices and the gears used for the two differential gear devices and are integrated into a single configuration to implement connection between the two planetary gear devices and the two differential gear devices. In other words, the two ring gears of the two planetary gear devices and the two differential side gears of the ring differential gear device are integrated into a single configuration, and any one of the two sun gears of the two planetary gear devices and any one of the two differential side gears of the sun differential gear device are integrated into a single configuration. In other words, it can be seen that the apparatus illustrated inFIGS.3and4further includes the sun differential gear device, such that any one of the two sun gears of the two planetary gear devices and any one of the two differential side gears of the further included sun differential gear device are integrated into a single configuration.

It can be seen that in case that any one of the six shafts is configured as an output shaft, and the remaining shafts are configured as input shafts, very various gear shift ratios may be obtained from the six-axis planetary gear device by selecting an operation of transmitting a rotational force to the input shafts or braking the input shafts. However, the number of output shafts is not limited to one. Further, one shaft may be configured as an output shaft or an input shaft. The rotational forces may be merged or distributed between the plurality of shafts. In addition, any one of or both the first ring double-sided gear2and the second ring double-sided gear12are braked, the planetary gear device including the first sun gear shaft34and the planetary gear device including the fourth differential side bevel gear shaft104are separated from each other and operated independently. For example, when the first ring double-sided gear2is braked, the first sun gear shaft34and the shaft of the first carrier5are each a kind of reduction gear, and the fourth differential side bevel gear shaft104, the fourth sun carrier shaft84, the shaft of the second carrier15, and the shaft of the ring6constitute the single four-axis planetary gear device.

When the second ring double-sided gear12is braked, the first sun gear shaft34, the shaft of the first carrier5, and the shaft of the ring6constitute the single three-axis planetary gear device, and the fourth differential side bevel gear shaft104, the fourth sun carrier shaft84, and the shaft of the second carrier15constitute the single three-axis planetary gear device.

When the first ring double-sided gear2and the second ring double-sided gear12are simultaneously braked, the first sun gear shaft34and the shaft of the first carrier5are each a kind of reduction gear, and the fourth differential side bevel gear shaft104, the fourth sun carrier shaft84, and the shaft of the second carrier15constitute the single three-axis planetary gear device.

FIGS.11and12are views illustrating a nine-axis planetary gear device according to the present invention that is a modification by applying the configurations inFIGS.7and8.

The nine-axis planetary gear device illustrated inFIGS.11and12is made by additionally installing the fifth sun carrier shaft114, the fifth sun pinion117, the fifth sun protrusion shaft118, the fifth differential side bevel gear119, the third differential side double-sided bevel gear80, the sixth sun carrier shaft124, the sixth sun pinion127, the sixth sun protrusion shaft128, the sixth differential side bevel gear129, and the fourth differential side double-sided bevel gear90, which are illustrated inFIGS.11and12, in the apparatus illustrated inFIGS.7and8. Theoretically, it is possible to continuously increase the number of shafts by repeating this method.

Nine shafts, which are connected to one another and operated in the apparatus, are provided as the shaft of the first carrier5, the shaft of the second carrier15, the shaft of the ring6, the third sun carrier shaft74, the fourth sun carrier shaft84, the fifth sun carrier shaft114, the sixth sun carrier shaft124, the fifth differential side bevel gear shaft134, and the sixth differential side bevel gear shaft144. A hollow shaft may be made and used for the ring6, or the ring6may be used through external direct contact without a hollow shaft. Therefore, the shaft is not illustrated.

It can be seen that the apparatus inFIGS.11and12includes seven planetary gear devices.

Two planetary gear devices are provided which include a planetary gear device in which the first sun double-sided gear1, the first planet gear3, and the first ring double-sided gear2are respectively used as a sun gear, a planet gear, and a ring gear, and a planetary gear device in which the second sun double-sided gear11, the second planet gear13, and the second ring double-sided gear12are respectively used as a sun gear, a planet gear, and a ring gear. Further, five differential gear devices are provided which include a sun differential gear device in which the first sun double-sided gear1and the third differential side double-sided bevel gear80are used as differential side gears, the third sun pinion77is used as a differential pinion, and the third sun carrier shaft74is used as a differential carrier, a sun differential gear device in which the second sun double-sided gear11and the fourth differential side double-sided bevel gear90are used as differential side gears, the fourth sun pinion87is used as a differential pinion, and the fourth sun carrier shaft84is used as a differential carrier, a sun differential gear device in which the third differential side double-sided bevel gear80and the fifth differential side bevel gear119are used as differential side gears, the fifth sun pinion117is used as a differential pinion, and the fifth sun carrier shaft114is used as a differential carrier, a sun differential gear device in which the fourth differential side double-sided bevel gear90and the sixth differential side bevel gear129are used as differential side gears, the sixth sun pinion127is used as a differential pinion, and the sixth sun carrier shaft124is used as a differential carrier, and a ring differential gear device in which the first ring double-sided gear2and the second ring double-sided gear12are used as differential side gears, the ring pinion9is used as a differential pinion, and the ring6is used as a differential carrier.

This configuration is identical to the configuration in which the sun differential gear device, in which the fifth sun pinion117is used as the differential pinion, and the sun differential gear device, in which the sixth sun pinion127is used as the differential pinion, are further included in the seven-axis planetary gear device illustrated inFIGS.7and8, any one differential side gear of the sun differential gear device, in which the fifth sun pinion117is used as the differential pinion, and any one differential side gear of the sun differential gear device, in which the third sun pinion77is used as the differential pinion, are integrated and constitute the third differential side double-sided bevel gear80, and any one differential side gear of the sun differential gear device, in which the sixth sun pinion127is used as the differential pinion, and any one differential side gear of the sun differential gear device, in which the fourth sun pinion87is used as the differential pinion, are integrated and constitute the fourth differential side double-sided bevel gear90.

It can be seen that in case that any one of the nine shafts is configured as an output shaft, and the remaining shafts are configured as input shafts, very various gear shift ratios may be obtained from the nine-axis planetary gear device by selecting an operation of transmitting a rotational force to the input shafts or braking the input shafts. However, the number of output shafts is not limited to one. Further, one shaft may be configured as an output shaft or an input shaft. The rotational forces may be merged or distributed between the plurality of shafts. In addition, any one of or both the first ring double-sided gear2and the second ring double-sided gear12are braked, the planetary gear device including the fifth differential side bevel gear shaft134and the planetary gear device including the sixth differential side bevel gear shaft144are separated from each other and operated independently.

For example, when the first ring double-sided gear2is braked, the shaft of the first carrier5, the third sun carrier shaft74, the fifth sun carrier shaft114, and the fifth differential side bevel gear shaft134constitute the single four-axis planetary gear device, and the shaft of the ring6, the shaft of the second carrier15, the fourth sun carrier shaft84, the sixth sun carrier shaft124, and the sixth differential side bevel gear shaft144constitute the single five-axis planetary gear device. When the first ring double-sided gear2and the second ring double-sided gear12are simultaneously braked, the two four-axis planetary gear devices are implemented.

FIG.13illustrates a modification ofFIGS.3and4. A five-axis planetary gear device illustrated inFIG.13further uses the rings41r,15r,5r, and31rand the circular plate-shaped wheels41w,15w,5w, and31wto install the brake on the shaft, the gear connected to the shaft, or the part connected to the gear. The brake may be easily installed by means of a ring or a part exposed to the outside, and thus the braking may be easily performed when the parts need not be rotated.

The hollow shafts6s,15s, and44and the circular plate-shaped discs5d,6d, and15dare further used to install the wheels and the rings. Among the five shafts5s,6s,15s,34, and44, the four shafts5s,6s,15s, and44are disposed at the left side, and one shaft34is disposed at the right side. The discs5d,6d, and15dare respectively attached to some of the shafts5s,6s, and15s, and the carriers5and15or the ring protrusion shaft10attached to the discs5d,6d, and15d. With reference toFIG.15, it can be seen that the arrangements of the shafts at the left and right sides may vary, as necessary, without being limited to the arrangement inFIG.13.

The component, which is required to be braked, is not limited to the shaft. The brake may be easily installed because the first ring double-sided gear2and the second ring double-sided gear12are exposed to the outside. The planetary gear device including the first sun gear shaft34and the planetary gear device including the second sun gear shaft44may be separated from each other and operated independently by braking the first ring double-sided gear2and the second ring double-sided gear12.

The number and installation of the discs, wheels, and rings are not limited, and the discs, wheels, and rings may be installed, as necessary.

In the five-axis planetary gear device illustrated inFIG.13, the first carrier shaft5sand the first sun gear shaft34need not be configured as hollow shafts. However, the hollow shaft may be required in case that the separate planetary gear device is present at the right side of the apparatus, and the shafts need to be connected from the left side of the apparatus. In case that the first carrier shaft5sextends toward the right side, only the first sun gear shaft34may be configured as a hollow shaft.

Five shafts, which are connected to one another and operated in the apparatus, are provided as the first carrier shaft5s, the second carrier shaft15s, the ring carrier shaft6s, the first sun gear shaft34, and the second sun gear shaft44.

It can be seen that the apparatus inFIG.13includes three planetary gear devices, like the apparatus inFIGS.3and4. The descriptions inFIGS.3and4show the configurations and integration of the planetary gear devices.

FIG.14illustrates a modification ofFIG.13. The four-axis planetary gear device is implemented by removing some components6,10,9,6d,6s,2, and12inFIG.13and additionally installing the ring double-sided gear152.

The brake may be easily installed because the ring double-sided gear152is exposed to the outside. The planetary gear device including the first sun gear shaft34and the planetary gear device including the second sun gear shaft44may be separated from each other and operated independently by braking the ring double-sided gear152.

The number and installation of the discs, wheels, and rings are not limited, and the discs, wheels, and rings may be installed, as necessary.

Four shafts, which are connected to one another and operated in the apparatus, are provided as the first carrier shaft5s, the second carrier shaft15s, the first sun gear shaft34, and the second sun gear shaft44.

FIG.15illustrates a modification ofFIG.14. InFIG.14, some shafts5sare moved and disposed at the right side. This illustrates that the shaft may be moved and disposed, as necessary.

The number and installation of the discs, wheels, and rings are not limited, and the discs, wheels, and rings may be installed, as necessary.

Four shafts, which are connected to one another and operated in the apparatus, are provided as the first carrier shaft5s, the second carrier shaft15s, the first sun gear shaft34, and the second sun gear shaft44.

It can be seen that the apparatus inFIGS.14and15includes two planetary gear devices.

Two planetary gear devices are provided which include a planetary gear device in which the first sun gear31, the first planet gear3, the ring double-sided gear152, and the first carrier5are respectively used as a sun gear, a planet gear, a ring gear, and a carrier, and a planetary gear device in which the second sun gear41, the second planet gear13, the ring double-sided gear152, and the second carrier15are respectively used as a sun gear, a planet gear, a ring gear, and a carrier. Further, there are the disc, the wheel, and the ring.

The ring double-sided gear152is configured by integrating the ring gears used for the two planetary gear devices and constitutes connection the two planetary gear devices. In other words, the two ring gears of the two planetary gear devices are integrated into a single configuration. Further, the disc is installed between the carrier shaft and the two carriers of the two planetary gear devices, and the wheel and the ring are installed with respect to the two carriers and the shafts of the two sun gears.

FIG.16illustrates a modification ofFIGS.7and8. A seven-axis planetary gear device illustrated inFIG.16further uses the rings5r,15r,74r,84r,94r, and104rand the circular plate-shaped wheels5w,15w,74w,84w,94w, and104wto install the brake on the shaft, the gear connected to the shaft, or the part connected to the gear. The brake may be easily installed by means of a part exposed to the outside, and thus the braking may be easily performed when the parts need not be rotated.

The hollow shafts5s,6s,15s,84s, and104, the circular plate-shaped discs5d,6d,15d,74d, and84d, and the cylindrical cylinders5c,15c,74c, and84care further used to install the wheels and the rings. Among the seven shafts5s,6s,15s,74s,84s,94, and104, the six shafts5s,6s,15s,74s,84s, and104are disposed at the left side, and one shaft94is disposed at the right side. The discs5d,6d,15d,74d, and84dare respectively attached to some of the shafts5s,6s,15s,74s, and84s, the cylinders5c,15c,74c, and84cor the ring protrusion shaft10is attached to the discs5d,6d,15d,74d, and84d, and the carriers5and15or the sun protrusion shafts78and88are attached to the cylinders5c,15c,74c, and84c. The arrangements of the shafts at the left and right sides may vary, as necessary, without being limited to the arrangement inFIG.16.

The component, which is required to be braked, is not limited to the shaft. The brake may be easily installed because the first ring double-sided gear2and the second ring double-sided gear12are exposed to the outside. The planetary gear device including the first carrier shaft5sand the planetary gear device including the second carrier shaft15smay be separated from each other and operated independently by braking the first ring double-sided gear2and the second ring double-sided gear12.

The number and installation of the discs, wheels, and rings are not limited, and the discs, wheels, and rings may be installed, as necessary.

Seven shafts, which are connected to one another and operated in the apparatus, are provided as the first carrier shaft5s, the second carrier shaft15s, the ring carrier shaft6s, the third sun carrier shaft driving shaft74s, the fourth sun carrier shaft driving shaft84s, the third differential side bevel gear shaft94, and the fourth differential side bevel gear shaft104.

It can be seen that the apparatus inFIG.16includes five planetary gear devices, like the apparatus inFIGS.7and8. The descriptions inFIGS.7and8show the configurations and integration of the planetary gear devices.

FIG.17illustrates a modification ofFIGS.9and10. A six-axis planetary gear device illustrated inFIG.17further uses the rings5r,15r,31r,84r, and104r) the circular plate-shaped wheels5w,15w,31w,84w, and104wto install the brake on the shaft, the gear connected to the shaft, or the part connected to the gear. The brake may be easily installed by means of a part exposed to the outside, and thus the braking may be easily performed when the parts need not be rotated.

The hollow shafts6s,15s,84s, and104, the circular plate-shaped discs5d,6d,15d, and84d, and the cylindrical cylinders5c,15c, and84care further used to install the wheels and the rings. Among the six shafts5s,6s,15s,84s,34, and104, the five shafts5s,6s,15s,84s, and104are disposed at the left side, and one shaft34is disposed at the right side. The discs5d,6d,15d, and84dare respectively attached to some of the shafts5s,6s,15s, and84s, the cylinders5c,15c, and84cor the ring protrusion shaft10is attached to the discs5d,6d,15d, and84d, and the carriers5and15or the sun protrusion shaft88is attached to the cylinders5c,15c, and84c. The arrangements of the shafts at the left and right sides may vary, as necessary, without being limited to the arrangement inFIG.17.

The component, which is required to be braked, is not limited to the shaft. The brake may be easily installed because the first ring double-sided gear2and the second ring double-sided gear12are exposed to the outside. The planetary gear device including the first carrier shaft5sand the planetary gear device including the second carrier shaft15smay be separated from each other and operated independently by braking the first ring double-sided gear2and the second ring double-sided gear12.

The number and installation of the discs, wheels, and rings are not limited, and the discs, wheels, and rings may be installed, as necessary.

Six shafts, which are connected to one another and operated in the apparatus, are provided as the first carrier shaft5s, the second carrier shaft15s, the ring carrier shaft6s, the first sun gear shaft34, the fourth sun carrier shaft driving shaft84s, and the fourth differential side bevel gear shaft104.

It can be seen that the apparatus inFIG.17includes four planetary gear devices, like the apparatus inFIGS.9and10. The descriptions inFIGS.9and10show the configurations and integration of the planetary gear devices.

FIG.18is a view illustrating an eight-axis planetary gear device according to the present invention that is a modification by applying the configurations inFIGS.7and8.

The eight-axis planetary gear device inFIG.18is configured by additionally installing the sixth sun carrier shaft124, the sixth sun pinion127, the sixth sun protrusion shaft128, the fourth differential side double-sided bevel gear90, the sixth differential side bevel gear129, and the sixth differential side bevel gear shaft144, which are illustrated inFIGS.11and12, in the apparatus illustrated inFIGS.7and8. The apparatus is configured by additionally installing the fifth sun carrier shaft114, the fifth sun pinion117, the fifth sun protrusion shaft118, the third differential side double-sided bevel gear80, the fifth differential side bevel gear119, and the fifth differential side bevel gear shaft134, which are illustrated inFIGS.11and12, in the apparatus illustrated inFIGS.7and8. Because the apparatus illustrated inFIGS.7and8is vertically symmetric, the result is the same even though any one of the two methods is selected.

Eight shafts, which are connected to one another and operated in the apparatus, are provided as the shaft of the first carrier5, the shaft of the second carrier15, the shaft of the ring6, the third sun carrier shaft74, the fourth sun carrier shaft84, the third differential side bevel gear shaft94, the sixth sun carrier shaft124, and the sixth differential side bevel gear shaft144. A hollow shaft may be made and used for the ring6.

This configuration is identical to the configuration in which the sun differential gear device, in which the fourth differential side double-sided bevel gear90and the sixth differential side bevel gear129are used for the differential side gear, the sixth sun pinion127is used for the differential pinion, and the sixth sun carrier shaft124is used for the differential carrier, is further included in the seven-axis planetary gear device illustrated inFIGS.7and8, and any one differential side gear90of the two differential side gears90and129of the sun differential gear device, in which the sixth sun pinion127is used as the differential pinion, and any one differential side gear89of the two differential side gears11and89of the sun differential gear device, in which the fourth sun pinion87is used as the differential pinion, are integrated and constitute the fourth differential side double-sided bevel gear90.

FIG.19illustrates a modification ofFIGS.11and12. A nine-axis planetary gear device illustrated inFIG.19further uses the rings5r,15r,74r,84r,114r,124r,134r, and144rand the circular plate-shaped wheels5w,15w,74w,84w,114w,124w,134w, and144wto install the brake on the shaft, the gear connected to the shaft, or the part connected to the gear. The brake may be easily installed by means of a part exposed to the outside, and thus the braking may be easily performed when the parts need not be rotated.

The hollow shafts15s,74s,84s,114s,124s,134, and144, the circular plate-shaped discs5d,6d,15d,74d,84d,114d, and124d, and the cylindrical cylinders5c,15c,74c,84c,114c, and124care further used to install the wheels and the rings. Among the nine shafts5s,6s,15s,74s,84s,114s,124s,134, and144, the five shafts6s,15s,84s,124s, and144are disposed at the left side, and the four shafts5s,74s,114s, and134are disposed at the right side. The discs5d,6d,74d,84d,114d, and124dare respectively attached to some of the shafts5s,6s,15s,74s,84s,114s, and124s, the cylinders5c,15c,74c,84c,114c, and124cor the ring protrusion shaft10is attached to the discs5d,6d,15d,74d,84d,114d, and124d, and the carriers5and15or the sun protrusion shafts78,88,118, and128are attached to the cylinders5c,15c,74c,84c,114c, and124c. The arrangements of the shafts at the left and right sides may vary, as necessary, without being limited to the arrangement inFIG.19.

The component, which is required to be braked, is not limited to the shaft. The brake may be easily installed because the first ring double-sided gear2and the second ring double-sided gear12are exposed to the outside. The planetary gear device including the first carrier shaft5sand the planetary gear device including the second carrier shaft15smay be separated from each other and operated independently by braking the first ring double-sided gear2and the second ring double-sided gear12.

The number and installation of the discs, wheels, and rings are not limited, and the discs, wheels, and rings may be installed, as necessary.

Nine shafts, which are connected to one another and operated in the apparatus, are provided as the first carrier shaft5s, the second carrier shaft15s, the ring carrier shaft6s, the third sun carrier shaft driving shaft74s, the fourth sun carrier shaft driving shaft84s, the fifth sun carrier shaft driving shaft114s, the sixth sun carrier shaft driving shaft124s, the fifth differential side bevel gear shaft134, and the sixth differential side bevel gear shaft144.

FIG.20illustrates a modification ofFIG.18. An eight-axis planetary gear device illustrated inFIG.20further uses the rings5r,15r,74r,84r,94r,124r, and144rand the circular plate-shaped wheels5w,15w,74w,84w,94w,124w, and144wto install the brake on the shaft, the gear connected to the shaft, or the part connected to the gear. The brake may be easily installed by means of a part exposed to the outside, and thus the braking may be easily performed when the parts need not be rotated.

The hollow shafts15s,74s,84s,94,124s, and144, the circular plate-shaped discs5d,6d,15d,74d,84d, and124d, and the cylindrical cylinders5c,15c,74c,84c, and124care further used to install the wheels and the rings. Among the eight shafts5s,6s,15s,74s,84s,94,124s, and144, the five shafts6s,15s,84s,124s, and144are disposed at the left side, and the three shafts5s,74s, and94are disposed at the right side. The discs5d,6d,15d,74d,84d, and124dare respectively attached to some of the shafts5s,6s,15s,74s,84s, and124s, the cylinders5c,15c,74c,84c, and124cor the ring protrusion shaft10is attached to the discs5d,6d,15d,74d,84d, and124d, and the carriers5and15or the sun protrusion shafts78,88, and128are attached to the cylinders5c,15c,74c,84c, and124c. The arrangements of the shafts at the left and right sides may vary, as necessary, without being limited to the arrangement inFIG.20.

The component, which is required to be braked, is not limited to the shaft. The brake may be easily installed because the first ring double-sided gear2and the second ring double-sided gear12are exposed to the outside. The planetary gear device including the first carrier shaft5sand the planetary gear device including the second carrier shaft15smay be separated from each other and operated independently by braking the first ring double-sided gear2and the second ring double-sided gear12.

The number and installation of the discs, wheels, and rings are not limited, and the discs, wheels, and rings may be installed, as necessary.

Eight shafts, which are connected to one another and operated in the apparatus, are provided as the first carrier shaft5s, the second carrier shaft15s, the ring carrier shaft6s, the third sun carrier shaft driving shaft74s, the fourth sun carrier shaft driving shaft84s, the third differential side bevel gear shaft94, the sixth sun carrier shaft driving shaft124s, and the sixth differential side bevel gear shaft144.

The planetary gear device according to the present invention may be applied to an automatic transmission. In addition, in the hybrid vehicle or the like, the planetary gear device may be used to connect the plurality of power supplying devices and the plurality of power receiving devices, brake some of the connected devices, or divide the connected devices into two groups and separate the connected devices. Further, the planetary gear device may be used to integrate the devices and the transmission into a single configuration.

The planetary gear device may be used for the apparatus that merges, distributes, or separates the rotational forces by connecting the plurality of shafts.