Source: http://www.google.com/patents/US7886633?ie=ISO-8859-1
Timestamp: 2014-07-26 02:30:29
Document Index: 700404751

Matched Legal Cases: ['art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 35', 'art 35', 'art 35', 'art 52', 'art 52', 'art 52', 'art 53', 'art 53', 'art 59', 'arts 67', 'arts 67', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'art 5', 'Application No. 200680028020']

Patent US7886633 - Swing type working vehicle - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign in<nobr>Advanced Patent Search</nobr>PatentsA swing type working vehicle, wherein a space at the foot portion of an operator can be increased when pedal operation is not required. A step is installed on the front part of a swing table frame, and pedals for operating hydraulic actuators are disposed on the step. The base parts of the pedals are...http://www.google.com/patents/US7886633?utm_source=gb-gplus-sharePatent US7886633 - Swing type working vehicleAdvanced Patent SearchPublication numberUS7886633 B2Publication typeGrantApplication numberUS 11/994,735Publication dateFeb 15, 2011Filing dateJan 19, 2006Priority dateJul 5, 2005Also published asCN101233280A, CN101233280B, EP1903153A1, EP1903153A4, EP1903153B1, US20090049718, WO2007004331A1Publication number11994735, 994735, US 7886633 B2, US 7886633B2, US-B2-7886633, US7886633 B2, US7886633B2InventorsKatashi TanakaOriginal AssigneeYanmar Co., LtdExport CitationBiBTeX, EndNote, RefManPatent Citations (10), Non-Patent Citations (2), Referenced by (1), Classifications (17), Legal Events (2) External Links: USPTO, USPTO Assignment, EspacenetSwing type working vehicleUS 7886633 B2Abstract A swing type working vehicle, wherein a space at the foot portion of an operator can be increased when pedal operation is not required. A step is installed on the front part of a swing table frame, and pedals for operating hydraulic actuators are disposed on the step. The base parts of the pedals are supported so that these pedals can be swung forward and backward. When the pedals are swung backward, they are brought into contact with the operating members of the hydraulic actuators to disable the operation, and when the pedals are swung forward, they are held in the state of being brought into contact with the step.
a swing table frame;
front and rear steps arranged on a front part of the swing table frame wherein the front step is higher than the rear step so that the front step has a rising rear end portion which rises from a front end portion of the rear step; and
a pedal for operating a hydraulic actuator, wherein the pedal is formed at one end portion thereof with a base part, and is formed at the other end portion thereof with a foot-contact part whose opposite surfaces serve as foot-contact surfaces,
wherein the pedal is pivotally supported at the base part thereof so as to be able to swing the foot-contact part forward and backward,
wherein, when the pedal is swung so as to swing the foot-contact part backward, one of the foot-contact surfaces faces upward so as to have an operator's foot thereon for pedaling, and the foot-contact part is placed over the rear step and is brought into contact with an operating member of the hydraulic actuator to enable the operation of the hydraulic actuator, and
wherein, when the pedal is swung so as to swing the foot-contact part forward, the other of the foot-contact surfaces faces upward to serve as a footrest, and the pedal is held so that the foot-contact part is not in contact with the operation member and is in contact with the step, so as to disable the operation of the hydraulic actuator.
2. The working vehicle according to claim 1, wherein the pedal is to entirely formed in an L-shape in side view by bending a portion thereof between the base part and the foot-contact part so that the L-shape of the pedal conforms to the shape of the rising rear end portion of the front step.
3. The working vehicle according to claim 1, wherein an option switch is arranged on the front step so as to be covered with the foot-contact part arranged thereabove when the foot-contact part of the pedal is swung forward. Description
The present invention relates to a structure of a swing type working vehicle including a step on a front part of a swing table frame and arranging an operation pedal for hydraulic actuator operation on the step.
Conventionally, in a swing type working vehicle such as a power shovel, a swing table frame is generally arranged on a traveling device, a working vehicle including a boom, an arm, and an attachment such as a bucket is attached to the front part of the swing table frame, and an engine, a counter weight, and the like are arranged on the rear part of the swing table frame. A step is arranged at the front part of a drive operation unit on the swing table frame, and a boom swing operation pedal, a PTO operation pedal, and the like are arranged on the step. The pedals include a cover at the vicinity thereof, and are made non-operable by being covered by such cover (see e.g., Patent Document 1).
In the swing type working vehicle of the prior art, the operation pedal and the cover thereof occupy a certain space on the step even if operation of the operation pedal is unnecessary, and thus become a hindrance when ensuring the foot space. Since the operation pedal is made non-operable using the cover, the number of components is large.
[Patent Document 1] Japanese Laid-Open Patent Publication No. 2004-36343
BRIEF SUMMARY OF THE INVENTION Problem to be Solved by the Invention The problem to be solved is to enlarge the space of the foot portion of the operator when the pedal operation is unnecessary.
Means for Solving the Problem A swing type working vehicle of the present invention relates to a swing type working vehicle in which a step is arranged on a front part of a swing table frame and pedals for operating hydraulic actuators are disposed on the step; wherein base parts of the pedals are supported so as to be swung forward and backward, where when the pedals are swung backward, the pedals are brought into contact with operating member of the hydraulic actuators to disable the operation and when swung forward, the pedals are held in a state of being brought into contact with the step.
In the swing type working vehicle, the pedal is configured to an L-shape in side view and has one side pivotally supported and the other side formed with foot placing parts on both upper and lower surfaces.
In the swing type working vehicle, an option switch is arranged below the pedals when the pedals are swung forward, and is configured to cover the switch when the pedals are swung forward.
EFFECTS OF THE INVENTION In the swing type working vehicle, since base parts of the pedals are supported so as to be swung forward and backward, where when the pedals are swung backward, the pedals are brought into contact with an operating member of the hydraulic actuators to disable the operation and when swung forward, the pedals are held in a state of being brought into contact with the step in the swing type working vehicle in which a step is arranged on a front part of a swing table frame and pedals for operating hydraulic actuators are disposed on the step, the pedals can be swung and accommodated at the front part of the step when the pedals are not necessary, wherein the space for the foot portion of the operation can be enlarged. Since the operation of the hydraulic actuator cannot be performed when the pedals are swung forward, a cover for disabling the operation of the pedals becomes unnecessary, and the number of components can be reduced. The inadvertent operation of the pedals is thus reliably prevented.
In the swing type working vehicle of the present invention, since the pedal is configured to an L-shape in side view and has one side pivotally supported and the other side formed with foot placing parts on both upper and lower surfaces, the back surface serves as a foot placement when the pedals are swung forward, and a foot resting area for the operator can be ensured.
In the swing type working vehicle, since an option switch is arranged below the pedals when the pedals are swung forward, and is configured to cover the switch when the pedals are swung forward, the pedals are accommodated when the option working vehicle is not used to cover the switch exposed on the step, thereby preventing false operation of the switch.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a left side view of a rear ultraminiature swing type working vehicle according to one example of the present invention;
FIG. 2 is a perspective view of a main equipment of the swing type working vehicle;
FIG. 3 is a plan view showing an arrangement structure of a swing table frame;
FIG. 4 is a rear view showing an arrangement structure of the swing table frame;
FIG. 5 is a plan view of the swing table frame;
FIG. 10 is a right side view showing an arrangement structure of the swing table frame;
FIG. 13 is a front view showing an arrangement structure of the right side of a front part of the swing table frame;
FIG. 14 is a left side view showing the arrangement structure of the swing table frame;
FIG. 15 is a perspective view showing the arrangement structure of the left side of the front part of the swing table frame;
FIG. 22 is a left side view of an ultraminiature swing type working vehicle according to one example of the present invention;
FIG. 23 is a right side view of an upper part of the ultraminiature swing type working vehicle;
FIG. 24 is a plan view of the swing table frame;
FIG. 25 is a rear view of the offset type working vehicle; and
FIG. 26 is a rear view of a second boom.
DETAILED DESCRIPTION OF THE INVENTION As shown in FIG. 1, FIG. 2, and FIG. 3, in a rear ultraminiature swing type power shovel in which a swing type working vehicle such as working vehicle 1 is attached at the middle in the left and right direction of the front part of a main equipment 2, a swing table frame 5 is supported in a left and right rotatable manner by way of a rotary base bearing at the middle of the upper part of a crawler traveling device 3, and a rotary motor 6 is arranged on the swing table frame 5. A blade 7 is arranged in a freely up and down turning manner on either the front or the rear side of the crawler traveling device 3. A bonnet 10 for covering an engine 8 etc. is arranged on the upper part of the swing table frame 5, and a driver's seat 11 is arranged on the bonnet 10 or on the front side of the bonnet 10. An operation lever, a lock lever, and the like are arranged near the driver's seat 11, and a travel lever and a pedal are arranged on a step 12 on the front side of the driver's seat 11 thereby configuring a drive operation unit 13. A canopy 14 or a cabin is arranged above the drive operation unit 13.
A boom bracket 15 is attached in a left and right turning manner at the middle in the left and right direction of the front end of the swing table frame 5, and a lower end of a boom 16 is supported in the up and down (front and back) turning manner by the boom bracket 15. The boom 16 is bent towards the front side at the middle to be formed to a substantially dogleg shape in side view. A rear end of an arm 17 is supported so as to swing forward and backward at the upper end of the boom 16, and a bucket 18 which is a work attachment, is supported so as to swing forward and backward at the front end of the arm 17. A boom turning boom cylinder 20 is interposed between the front part of the boom bracket 15 and the front part of the middle part of the boom 16, an arm turning arm cylinder 21 is interposed between a rear surface of the middle part of the boom 16 and a stay arranged at the rear end of the arm 17, and a bucket turning bucket cylinder 22 is interposed between the stay at the rear part of the arm 17 and the bucket 18. The boom 16, the arm 17, the bucket 18, and each cylinder 21, 22, 23 configure the working vehicle 1.
In the working vehicle 1, the boom 16 can be turned by an extension drive of the boom cylinder 20, the arm 17 can be turned by an extension drive of the arm cylinder 21, and the bucket 18 can be turned by an extension drive of the bucket cylinder 22. In the main equipment 2, the swing table frame 5 on the crawler traveling device 3 is rotatable by the rotation drive of the rotary motor 6. The cylinders 21, 22, 23, which are hydraulic actuators, and the rotary motor 6 are configured so as to be driven by a pressurized supply of oil through a hydraulic hose from a hydraulic pump 26 arranged on the swing table frame 5 when a control valve 25 is switched through a turning operation of the operation lever, pedal, or the like arranged on the drive operation unit 13.
As shown in FIG. 2 to FIG. 5, an opening 5 a for arranging a rotary base bearing is formed at the middle in the front and back, and left and right directions of the swing table frame 5, where the center serves as the center of rotation of the main equipment 2. The rear part of the swing table frame 5 is formed so that an outer peripheral shape has a semicircular (substantially ⅗ circle) shape with the center of rotation as the center in plan view, where the radius of the semicircular portion is substantially the same as the radius of the rotation trajectory of the rear end of the swing table frame 5. In other words, the distance from the center of rotation to the circular arc portion is assumed as the radius of the rotation trajectory of the substantially circular shape drawn by the rear part of the swing table frame 5. The swing table frame 5 has left and right width substantially matching the left and right width of the crawler traveling device 3, and is configured to be rotatable by the rotary motor 6 arranged in the vicinity of the opening 5 a on the crawler traveling device 3.
The front part of the swing table frame 5 is cut to a straight line in the left and the right direction so that the outer peripheral shape has a linear shape. A boom bracket attachment part 5 b for attaching the boom bracket 15 configured to a substantially triangular shape in plan view is arranged so as to project towards the front side at the middle in the left and the right direction of the linear part, and is arranged so that the boom bracket 15 for attaching the working vehicle 1 is positioned within the rotation radius at the front part of the boom bracket attachment part 5 b. The drive operation unit 13 is arranged on the left side of the swing table frame 5, the bonnet 10 is arranged on the right side and the rear part so as to lie along the outer peripheral shape of the swing table frame 5, and the engine 8, the hydraulic pump 26, the fuel tank, the hydraulic fluid tank, the radiator and the like are accommodated in the bonnet.
Furthermore, a step difference part 5 c depressed towards the rear side is arranged on either the left or the right side at the front part of the swing table frame 5, or in the present example, the right side which is on the symmetrically opposite side with respect to the drive operation unit 13. The front surface of the step difference part 5 c extends in the left and right direction. An opening 10 a is formed on the upper side of the front surface of the step difference part 5 c, and a swing cylinder 28 is arranged so as to project towards the boom bracket 15 from the opening 10 a. The swing cylinder 28 has the rear end pivotally supported in a freely turning manner by a pivot supporting part 5 d arranged on the swing table frame 5 and the front end connected to the boom bracket 15, so that the boom bracket 15 can turn to the left and the right with respect to the swing table frame 5 by the extension drive.
Furthermore, a second step 29 is arranged on the upper side of the step difference part 5 c of the swing table frame 5 so as to hide the step difference part 5 c and the opening 10 a and cover the upper front part of a cylinder tube of the swing cylinder 28, and to be positioned within the rotation radius. The second step 29 having a substantially triangular shape in plan view is detachably fixed to the front part of the bonnet 10, and is arranged so that the height of the upper surface coincides continuously in the left and right direction with the step 12 arranged at the front part of the drive operation unit 13. A walk through space opening in the left and right direction is thereby formed on the upper side of the step 12 and the second step 29, whereby a workable range in the main equipment 2 is enlarged by the walk through space and workability is improved. The hydraulic hose is collectively extended towards each cylinder 20, 21, 22 arranged in the working vehicle 1 from the opening 10 a on the lower side of the second step 29, whereby maintenance is easily carried out by removing the second step 29.
On the swing table frame 5 covered with the bonnet 10, a supporting body integrally configured with an engine support member 31 for supporting the engine 8 arranged in the left and right direction on the swing table frame 5 and a canopy installation member 32 for installing the canopy 14 is fixedly arranged on the swing table frame 5, as shown in FIG. 6 to FIG. 9. The supporting body is configured to a substantially L-shape in plan view.
As shown in FIG. 9, the engine support member 31 includes a back frame 31 a and a front frame 31 b arranged parallel on the front and the back in the left and right direction, and frames 31 c, 31 d arranged parallel on the left and the right in the front and back direction, where the frames 31 a, 31 b, 31 c, 31 d are arranged in a horizontal direction and configure a frame shape. The back frame 31 a is directly fixed and arranged on the swing table frame 5, and the front frame 31 b is fixedly arranged on the swing table frame 5 by way of a bracket 33 folded to a reverse U-shape in side view. The left and right frames 31 c and 31 d configured to a ship bottom shape in side view are transversely arranged at an appropriate spacing between the back frame 31 a and the front frame 31 b. The engine 8 is supported on the back frame 31 a and the front frame 31 b of the engine support member 31 by way of a vibration absorption member 34, and the canopy installation member 32 is raised at the back frame 31 a. The canopy installation member 32 includes column shaped left and right frames 32 a, 32 b and a plate shaped canopy installation plate 32 c, where the left and right frames 32 a, 32 b are fixedly arranged so as to project to the upper side from both left and right sides of the back frame 31 a of the engine support member 31, and the canopy installation plate 32 c is transversely arranged between the upper ends of the left and right frames 32 a, 32 b. The canopy installation member 32 is thereby integrally formed with the engine support member 31 and fixed on the swing table frame 5 with a bolt etc., and thus tilt or vibration in the front and back direction can be reduced compared to when fixedly arranged on the swing table frame 5 alone. That is, since a heavy engine is mounted on the engine support member 31, the canopy installation member 32 is less likely to tilt towards the rear side and the tilt towards the front side is inhibited by the engine support member 31, and thus is stably supported on the swing table frame 5. The canopy installation plate 32 c is arranged on the rear side of the driver's seat 11 of the drive operation unit 13, and the canopy 14 is attached and fixed on the canopy installation plate 32 c. Furthermore, a reinforcement member 35 is connected between the upper part of the canopy installation member 32 and the front part of the engine support member 31 to reinforce the supporting body. That is, the reinforcement member 35 is configured by forming the plate to a substantially reverse L-shape in side view, arranged so as to surround the upper front side of the engine 8, connected to the front frame 31 b of the engine support member 31 at the lower part of a vertical part 35 a, and connected to the canopy installation plate 32 c of the canopy installation member 32 at the rear part of a horizontal part 35 b. The canopy installation member 32 and the engine support member 31 are formed to a frame shape in side view and firmly fixed by the reinforcement member 35.
Thus, the canopy installation member 32 and the engine support member 31 are integrally fixed on the swing table frame 5, and the canopy installation member 32 can be firmly fixed and stabilized compared to when the canopy installation member 32 is fixed alone on the swing table frame 5. The canopy installation member 32 and the engine support member 31 can be assembled to the swing table frame 5 with various equipments attached to the canopy installation member 32 and the engine support member 31, whereby the assembling performance as a module can be improved.
An equipment to be attached to a supporting body integrally configured by the canopy installation member 32 and the engine support member 31 includes a battery 36, an air cleaner 37, a radiator 40, and the like. The battery 36 is supported and fixed on a battery mounting base 38 attached to the left frame 32 a of the canopy installation member 32, and is arranged on the rear side of the upper left part of the engine 8. The air cleaner 37 is attached to the bottom surface of the canopy installation plate 32 c by way of a stay 39 and the like, and is arranged on the upper rear side of the middle part in the left and right direction of the engine 8. The radiator 40 is supported on a radiator supporting base 41 attached to the right end of the back frame 31 a and the front frame 31 b of the engine support member 31, and is arranged on the right side of the engine 8. The hydraulic hose and harness are additionally attached to the canopy installation member 32, so that vibration and entanglement are prevented.
A muffler 42 is attached to the reinforcement member 35. The muffler 42 is attached by way of a stay 43 attached to the horizontal part 35 b of the reinforcement member 35, and is arranged in the front and back direction at the upper side of the engine 8. As various equipment can be attached to the supporting body, the engine 8 is attached to the supporting body and then various equipment such as the battery 36 or the air cleaner 37, the radiator 40, and the muffler 42 are attached to the canopy installation member 32 and the reinforcement member 35 from the front and back and left and right periphery of the engine before attaching to the swing table frame 5, whereby assembly can be performed with tools and hands brought closer to each part, and can be reliably and easily performed.
A pivotally supporting part 52 b is arranged in a projecting manner parallel to the shaft part 52 a from the other end in the short side direction at one end in the longitudinal direction of each blade 52, and the pivotally supporting part 52 b is pivotally supported by a lever 53 arranged in the up and down direction parallel to the side frame 51. The lever 53 is then connected to the blades 52 so that the blades 52 can be turned in the same direction by moving the lever 53 in the up and down direction. The upper part of the lever 53 is extended to the upper side of the duct 48, and the upper end part 53 a thereof is bent so as to contact the side wall of the duct 48. The position fixing member is arranged between the upper part of the lever 53 and the duct 48. That is, a bolt is projected to the side from the upper end part 53 a of the lever 53.
A fuel tank 59 is arranged on the front side of the radiator 40 and the louver 50. As shown in FIG. 10 and FIG. 13, the fuel tank 59 is mounted and fixed on the swing table frame 5, and the upper part is covered with the cover 58. An oil supply port 59 a is formed in the upper surface of the fuel tank 59, where the cover 58 is turned upward to be opened, so that oil can be supplied to the fuel tank 59 from the oil supply port 59 a. The inner side in the left and right direction of the equipment body at the lower part of the fuel tank 59 has a cutout shape, and the swing cylinder 28 is arranged in the cutout part 59 b. The fuel tank 59 has the lower end bulging out towards the side of the swing cylinder 28 to enlarge the capacity, and is arranged on the same left or right side of the swing cylinder 28 and the swing table frame 5. A reservoir tank may be similarly configured and arranged in place of the fuel tank 59.
The hydraulic pump 26 is arranged on the symmetrically opposite side with respect to the radiator 40 of the engine 8, and is drivable by the engine 8. As shown in FIG. 3, a reservoir tank 61 is arranged on the left side of the hydraulic pump 26, and the control valve 25 is arranged on the front side of the reservoir tank 61. The control valve 25 and the hydraulic pump 26, the reservoir tank 61 and control valve 25 and the rotary motor 6, the swing cylinder 28, and each cylinder 20, 21, 22 of the working vehicle 1 are connected with the hydraulic hose, and the hydraulic oil is supplied from the reservoir tank 61.
As shown in FIGS. 14 and 15, the control valve 25 is arranged on the front left part of the swing table frame 5 at the front side of the reservoir tank 61, and the bracket 62 is held and fixed in a state raised in a tilted manner so as to be high on the front side and low on the rear side. Since the control valve 25 is arranged in a tilted manner, it can be arranged on the front side of the swing table frame 5 as much as possible, and the rear end position of the control valve 25 can be positioned on the front side. The space on the rear side can be formed large, the front part of the reservoir tank 61 can be arranged in a bulging out manner in the relevant space, and the capacity of the reservoir tank 61 can be enlarged. An external take-out component 63 for breaker and the like which serves as a post-attachment working vehicle can be arranged in a space formed on the lower front side of the control valve 25.
As shown in FIGS. 16 to 18, the PTO operation pedal 67 and the swing pedal 68 are supported so as to swing forward and backward with the supporting point axes 71, 72 as the center at the pedal base 65 on one side (front side), and are connected to the control valve 25 by way of a link mechanism 73 arranged on the pedal base 65. Similarly, the operation levers 69 are supported so as to swing forward and backward with the supporting point axes 74 as the center, and are connected to the control valve 25 by way of the link mechanism 73 arranged on the pedal base 65. Since the control valve 25 is arranged in a diagonally tilted manner with the front side high and the rear side low as described above, the distance between the upper end of the control valve 25 and the operation lever 69 or the operation pedal 70 is shorter than when arranged horizontally as in the prior art, whereby the link mechanism 73 for connecting the components has a simple structure, and the cost can be reduced. The operation pedals 70 can be stably pushed down and operated.
When the operation of the PTO operation pedal 67 or the swing pedal 68 is not necessary in such structure, the pedal 67, 68 is turned toward the front side with the supporting point axis 71, 72 as the center to contact the receiving member 75, 76 of the front step 12A, whereby the push-down operation of the pedal 67, 68 is disabled and inadvertent operation is prevented. At the same time, the option switches 77, 78 are covered by the placing parts 67 a, 68 a of the pedals 67, 68, and inadvertent operation thereof is also prevented. The lower surface of the placing parts 67 a, 68 a of the pedals 67, 68 can also be used as a foot rest, whereby the space for the foot portion of the operator at the step 12 can be efficiently used.
The swing table frame 5 including the engine 8, the hydraulic pump 26, the fuel tank, the hydraulic oil tank, the radiator, and the like is arranged with an attachment part at the middle in the left and right direction of a line extending in the left and right direction of the front part thereof to attach the working vehicle 1, so that the swing type working vehicle of a rear ultraminiature swing type is obtained, but an attachment part may be arranged at the step difference part 5 c formed on the right side of the front part to attach the working vehicle, so that the swing type working vehicle of an ultraminiature swing type is obtained, as shown in FIG. 22. That is, the rear ultraminiature swing type and the ultraminiature swing type working vehicle have a common shape other than the front end of the swing table frame 5, and thus can be commonly used. Therefore, the molding die of the swing table frame 5 in the rear ultraminiature swing type and the ultraminiature swing type working vehicle can be shared, which enhances productivity and reduces cost.
As shown in FIG. 23 and FIG. 24, when the ultraminiature swing type working vehicle is configured using such swing table frame 5, the working vehicle 101 is pivotally supported by a pivotally supporting part 5 e at the step difference part 5 c of the swing table frame 5 so that the supporting point 105 a is positioned within the rotary radius, and is arranged closer to the right side with respect to the swing table frame 5. The space of the drive operation unit 13 arranged on symmetrically opposite side of the working vehicle is ensured as wide as possible, and the comfortability of the drive operation unit 13 improves.
As shown in FIG. 23 and FIG. 25, the working vehicle 101 includes a bucket 102, an arm 103, a boom 104, and a hydraulic cylinder for operating the same, and is configured as an offset type working vehicle in which the bucket 102 serving as an attachment is movable in the left and right direction with respect to the boom 104. The boom 104 has, from the basal side, a first boom 105, a second boom 106, and a third boom 107 connected in order towards the distal end side from the main equipment side, where the base part of the first boom 105 is pivotally supported in an up and down (front and back) turning manner by the pivotally supporting part 5 e on the step difference part 5 c of the swing table frame 5, the base part of the second boom 106 is pivotally supported in a left and right turning manner at the distal end of the first boom 105, and the base part of the third boom 107 is pivotally supported in a left and right turning manner at the distal end of the second boom 106. The base part of the arm 103 is pivotally supported in an up and down turning manner at the distal end of the boom 104, that is, the distal end of the third boom 107, and the bucket 102 is pivotally supported so as to swing forward and backward at the distal end of the arm 103.
A boom turning boom cylinder 111 is interposed between the bracket 112 arranged projecting downward from a supporting point 105 a at the base part of the first boom 105 and a pivotally supporting part 5 f arranged at the rear part of the swing table frame 5; an arm turning arm cylinder 113 is interposed between the arm bracket 114 arranged projecting upward from the base part of the arm 103 and the base part of the third boom 107; and a bucket turning bucket cylinder 115 is interposed between the link mechanism 116 of the bucket 102 and the arm bracket 114. The boom 104 then can be turned by the extension drive of the boom cylinder 111, the arm 103 can be turned by the extension drive of the arm cylinder 113, and the bucket 102 can be turned by the extension drive of the bucket cylinder 115.
Furthermore, the first boom 105 is formed to a substantially S-shape in side view. The first boom 105 is configured such that the bucket 102 enters the space formed on the distal end side and at the same time so that the front part of the bonnet 10 enters the rear space formed on the base part side when the working vehicle 101 is at the most rear side position and the bucket 102 is turned to approach the boom 104 through the arm 103. Accordingly, the bucket 102 can be positioned on the main equipment side on the rear side as much as possible without increasing the turning angle to the rear side of the first boom 105, that is, the working vehicle 101, and the swing radius can be made small.
As shown in FIG. 23, the boom cylinder 111 for turning the boom 104 is accommodated in the bonnet 10 at the rear side of the step difference part 5 c of the swing table frame 5, and is arranged so as to be positioned on the lower side from the step 12 arranged in the drive operation unit 13. The wide space in the bonnet 10 is ensured, the capacity of the fuel tank 59, the reservoir tank 61, and the like to be accommodated in the space can be increased or the space through which the cooling airflow flows can be reliably ensured. Miniaturization and lighter weight of the working vehicle 101 can be achieved by arranging the boom cylinder 111 on the main equipment side instead of the working vehicle 101 side.
In the ultraminiature swing type working vehicle including the offset type working vehicle 101 described above, the boom cylinder 111 is arranged at substantially the same position as the swing cylinder 28 of the rear ultraminiature swing type working vehicle on the swing table frame 5, and the fuel tank 59 and the radiator 40 are arranged lined in the front and the back direction on the upper side of the boom cylinder 111 on the swing table frame 5 similar to above, and the engine 8 and the reservoir tank 61 are arranged side by side at the side of the radiator 40. Various equipments are thus efficiently arranged on the swing table frame 5, where the layout is configured to be shared between the rear ultraminiature swing type and the ultraminiature swing type working vehicle.
INDUSTRIAL APPLICABILITY The swing type working vehicle of the present invention enlarges the space of the foot portion of the operator when the pedal operation is unnecessary, and thus is industrially effective.
Patent CitationsCited PatentFiling datePublication dateApplicantTitleUS3431793 *Oct 6, 1966Mar 11, 1969Case Co J ISafety lock for pedal mechanismsUS5927153 *Nov 6, 1996Jul 27, 1999Caterpillar Inc.Pivotal foot pedal assemblyUS6526846 *May 4, 2000Mar 4, 2003Clark Equipment CompanyFolding foot pedal for vehicle drive controlJP2001166842A Title not availableJP2004036343A Title not availableJP2005222330A Title not availableJPH0215657A Title not availableJPS6234945A Title not availableJPS6391978A Title not availableJPS60144431A Title not available* Cited by examinerNon-Patent CitationsReference1Office Action in corresponding Chinese Application No. 200680028020.3, dated Aug. 11, 2010.2Supplementary European Search Report for Appl. No. EP 06 71 1983 from the European Patent Office dated Sep. 25, 2009, 3 pgs.Referenced byCiting PatentFiling datePublication dateApplicantTitleUS8177017 *Oct 15, 2009May 15, 2012Liebherr-Hydraulikbagger GmbhTraveling working machine* Cited by examinerClassifications U.S. Classification74/560International ClassificationE02F9/16, G05G1/48, G05G1/58, G05G1/30Cooperative ClassificationE02F9/0866, G05G1/58, G05G1/30, E02F3/307, E02F3/301, E02F9/2004European ClassificationG05G1/58, E02F9/20A, E02F3/30L, G05G1/30, E02F3/30A, E02F9/08N2Legal EventsDateCodeEventDescriptionJun 7, 2011CCCertificate of correctionMay 20, 2008ASAssignmentOwner name: YANMAR CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:TANAKA, KATASHI;REEL/FRAME:020972/0015Effective date: 20080119RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services©2012 Google