ELECTRICAL CONTROL APPARATUS OF INTERNAL SPEED CHANGE DEVICE OF WHEEL HUB FOR GEAR SWITCHING

An electrical control apparatus of an internal speed change device of a wheel hub for gear switching has a control base and a lateral cover; a circuit board, a motor and a logic driving ring being assembled in an interior receiving space between the control base and the lateral cover; the circuit board being installed with at least one signal transmission contact joint; the logic driving ring being installed with at least one logic loop and a logic driving ring gear; wherein the circuit board is used to drive the motor so that a motor gear of the motor drives the logic driving ring to rotate; rotation of the logic driving ring drives the at least one logic loop to rotate and be positioned to an object position so as to complete electrically control gear switching.

FIELD OF THE INVENTION

The present invention is related to speed change devices, and in particular to an electrical control apparatus of an internal speed change device of a wheel hub for gear switching.

BACKGROUND OF THE INVENTION

The prior art bicycle speed change devices are classified as prior exposed speed change devices and novel hidden form internal speed change devices hidden within the hub of the wheels. The way for change speed in the device is classified as manual control and automatic control.

However, the prior art design for switching gears electrically has the defects of complicated structures, too many components, high costs, heavy and large volume. All these lead to the reduction of economic efficiency and thus they are not ideal.

Therefore there is an eager demand for a novel design which has simple structure, less components, low cost, small volume, and light so that they are suitable for industrial utilization and being economic.

SUMMARY OF THE INVENTION

Accordingly, the object of the present invention is to provide an electrical control apparatus of an internal speed change device of a wheel hub for gear switching, wherein the structure of the present invention is compact, low cost, light weight and made of only fewer components, and practical in utilization. The electrical control apparatus of the internal speed change device of the wheel hub for gear switching of present invention can complete the actions of repeated rotation and positioning so as to achieve the object of switching of gears. The present invention is safe in operation, practical in industry use and is economic.

To achieve above object, the present invention provides an electrical control apparatus of an internal speed change device of a wheel hub for gear switching, comprising: a control base and a lateral cover being integrally formed; a circuit board, a motor and a logic driving ring being assembled in an interior receiving space between the control base and the lateral cover; the circuit board being installed with at least one signal transmission contact joint; the motor being installed with a motor gear; the logic driving ring being installed with at least one logic loop; the logic driving ring being installed with a logic driving ring gear engaged to the motor gear; and wherein number of the at least one signal transmission contact joint is equal to that of the logic loop of the logic driving ring; the circuit board is used to receive gear switching signals to drive the motor so that the motor gear of the motor drives the logic driving ring to rotate; rotation of the logic driving ring drives the at least one logic loop to rotate with a rotation angle and be positioned to an object position so as to control a lever of the internal speed change device and complete electrically control gear switching of the internal speed change device.

To achieve above object, the present invention further provides an electrical control apparatus of an internal speed change device of a wheel hub for gear switching, comprising: a control base and a lateral cover being integrally formed; a circuit board, a plurality of motors and a plurality of logic driving rings being assembled in an interior receiving space between the control base and the lateral cover; the circuit board being installed with a plurality of signal transmission contact joints; each of the motors being installed with a motor gear; each of the logic driving rings being installed with at least one logic loop; each of the logic driving rings being installed with a logic driving ring gear engaged to the respective motor gear; and the interior receiving space between the control base and the lateral cover being installed with a plurality of positioning seats; each of the positioning seats being installed with a respective one of the motors and a respective one of logic driving rings; and wherein number of the signal transmission contact joints is equal to that of said logic loop of the logic driving rings; the circuit board is used to receive gear switching signals to drive the motors so that the motor gear drives the logic driving ring to rotate; rotation of the logic driving ring drives the at least one logic loop to rotate with a rotation angle and be positioned to an object position so as to control a lever of the internal speed change device and complete electrically control gear switching of the internal speed change device.

DETAILED DESCRIPTION OF THE INVENTION

With reference toFIGS.1to4, the first embodiment of the present invention is illustrated. Furthermore, referring toFIGS.5to13, the second embodiment of the present invention is illustrated. The first embodiment of the present invention includes the following elements.

A control base1and a lateral cover5are integrally formed.

A circuit board2, a motor3and a logic driving ring4are assembled in an interior receiving space between the control base1and the lateral cover5. The circuit board2is installed with at least one signal transmission contact joint21. The motor3is installed with a motor gear31. The logic driving ring4is installed with at least one logic loop41. The logic driving ring4is installed with a logic driving ring gear42engaged to the motor gear31.

Number of the at least one signal transmission contact joint21is equal to that of the logic loop41of the logic driving ring4. The circuit board2is used to receive gear switching signals to drive the motor3so that the motor gear31of the motor3drives the logic driving ring4to rotate. Rotation of the logic driving ring4drives the at least one logic loop41to rotate with a rotation angle and be positioned to an object position so as to control a lever of the internal speed change device and complete electrically control gear switching of the internal speed change device.

The circuit board2receives the gear switching signals by a wired or wireless way. The circuit board2is installed with a controller (not shown) for receiving the gear switching signals. The interior receiving space between the control base1and the lateral cover5is installed with a positioning seat6. The motor3and the logic driving ring4are positioned on the positioning seat6. The at least one signal transmission contact joint21is positioned between the circuit board2and the logic driving ring4.

The logic loop41of the logic driving ring4is used to perform at least two stage controls of electrically control gear switching of the internal speed change device (as illustrated inFIGS.3and4, four stage controls are used as an example). In operation, an inner side of the logic driving ring4is used to be connected to a cam structure (not shown) or an electromagnetic structure (not shown), wherein the cam structure is used to directly drive the lever of the internal speed change device and the electromagnetic structure is used to indirectly drive the lever of the internal speed change device. By rotation of the logic driving ring4, the at least one logic loop41rotates to an object position and the cam structure or electromagnetic structure is driven to control the lever of the internal speed change device and complete the electrically control gear switching of the internal speed change device.

With reference toFIGS.5to13, the second embodiment of the present invention is illustrated. In this embodiment, those elements identical to those in the first embodiment are illustrated by the same numerals and they have the same functions and effects.

In the second embodiment, the signal transmission contact joint21further includes a left signal elastic finger21a, a right signal elastic finger21b, and a co-polarity elastic sheet21c. The at least one logic loop41is on an exterior of the logic driving ring4; and said logic loop41has a non-conductive body411made of non-conductive material. When the logic driving ring4rotates, the non-conductive body411rotates to the left signal elastic finger21afrom the right signal elastic finger21bto cause the left signal elastic finger21ato stop as it senses to be in an OFF state so as to complete a speed change operation. As illustrated in the drawing, the logic driving ring4rotates through a precise 180 degrees. By alternative operation of the left signal elastic finger21aand the right signal elastic finger21b, the logic driving ring4is repetitive rotated with a precise angle and the cam structure or electromagnetic structure is driven to control the lever of the internal speed change device and complete the electrically control gear switching of the internal speed change device.

With reference toFIGS.5, there are a plurality of motors3and a plurality of logic driving rings4assembled in an interior receiving space between the control base1and the lateral cover5. The circuit board2is installed with a plurality of signal transmission contact joints21. Each of the motors3is installed with a motor gear31. Each of the logic driving rings4is installed with at least one logic loop41. Each of the logic driving rings4is installed with a logic driving ring gear42engaged to the respective motor gear31. The interior receiving space between the control base1and the lateral cover5is installed with a plurality of positioning seats6. Each of the positioning seats6is installed with a respective one of the motors3and a respective one of logic driving rings4.

Number of the signal transmission contact joints21is equal to that of said logic loop41of the logic driving rings4. The circuit board2is used to receive gear switching signals to drive the motors3so that the motor gear31drives the logic driving ring4to rotate. Rotation of the logic driving ring4drives the at least one logic loop41to rotate with a rotation angle and be positioned to an object position so as to control a lever of the internal speed change device and complete electrically control gear switching of the internal speed change device.

The positioning seats6are spaced by a spacing ring7. The spacing ring7is a hollow ring. An exterior of the spacing ring7is formed with a plurality of installing surfaces71. Each of the installing surfaces71is installed with a respective one of the positioning seats6. The circuit board2receives the gear switching signals by a wired or wireless way. The circuit board2is installed with a controller (not shown for receiving the gear switching signals. The signal transmission contact joints21are positioned between the circuit board2and the logic driving rings4; and each of the signal transmission contact joints21includes a left signal elastic finger21a, a right signal elastic finger21b, and a co-polarity elastic sheet21c. The at least one logic loop41is on an exterior of the logic driving ring4; and said logic loop41has a non-conductive body411made of non-conductive material.

In operation, an inner side of the logic driving ring4is used to be connected to a cam structure (not shown) or an electromagnetic structure (not shown), wherein the cam structure is used to directly drive the lever of the internal speed change device and the electromagnetic structure is used to indirectly drive the lever of the internal speed change device. By rotation of the logic driving ring4, the at least one logic loop41rotates to an object position and the cam structure or electromagnetic structure is driven to control the lever of the internal speed change device and complete the electrically control gear switching of the internal speed change device.

Advantages of the present invention are that the structure of the present invention is compact, low cost, light weight and made of only fewer components, and practical in utilization. The electrical control apparatus of the internal speed change device of the wheel hub for gear switching of present invention can complete the actions of repeated rotation and positioning so as to achieve the object of switching of gears. The present invention is safe in operation, practical in industry use and is economic.