JP3029547U - Bicycle auxiliary drive - Google Patents

Abstract

The present invention relates to an auxiliary drive device for a bicycle, wherein a case containing a motor and other members is formed on a bicycle five-way pipe, and the motor and the gear plate are rotated coaxially to transmit the electric power. An object of the present invention is to provide an auxiliary drive device for a bicycle, which can reduce power loss and at the same time reduce required space. A motor 20, a ratchet sleeve 30, a speed reducer 40, and a bidirectional drive unit 50 are housed in a case 10 formed as a five-way tube, and the motor 20 drives and rotates the speed reducer 40 inside the case 10. A ratchet sleeve 30 fixedly contacting the gear plate 5 is provided inside the case 10 by penetrating the crankshaft 13 around which the crankshaft 13 and the speed reducing means 40 are respectively provided in the bidirectional drive units 50. The ratchet sleeve 30 is interlocked with the ratchets 51 and 52 so as to drive and rotate the gear plate 5.

Description

[Detailed description of the device]

[0001]

[Technical field to which the device belongs]

 The present invention relates to an auxiliary drive device for a bicycle.

[0002]

[Prior art]

 Nowadays, with the increasing awareness of environmental protection, there is a strong tendency that electric cars and bicycles equipped with electric drive devices that do not pollute the atmosphere may develop into the major models of the future. As an example, there is Taiwan Patent Publication No. 202003 (1993, 3, 11), in which a holding case is provided at a five-sided pipe portion through which the crankshaft is inserted, and a worm gear reducer is built in the case, and A motor is mounted above the case, and the rotation of the motor is reduced by the worm gear reducer to drive and rotate the gear plate on the side of the case. Further, the gear plate drives the chain to drive the rear wheels. By rotating it, the bicycle moves forward.

Generally, when a bicycle is driven on the road in general, if the bicycle is driven by the above-mentioned structure, it is sure that a considerably excellent auxiliary driving forward effect should be obtained. There is. That is, in the above structure, when the core shaft of the motor rotates, the reduction torque of the reducer is decelerated to increase the rotation torque so that the bicycle can easily move forward. Since it is orthogonal to the direction of, and the transmission of the motor core shaft causes the crankshaft to rotate in conjunction with the rotation deceleration of 90 degree direction change, the transmission efficiency of the motor is greatly reduced, and Since the design is aimed at weight reduction, if there are too many units such as motors and speed reducers as described above, not only will it take up space, but the structure will also become complicated, and it will return to the rider. It is easy to become a burden.

[0004]

[Problems to be solved by the device]

 In view of the above problems of the conventional auxiliary drive device for a bicycle, the present invention forms a case containing a motor and other members in a five-way pipe of a bicycle and rotates the motor and the gear plate coaxially. It is an object of the present invention to provide an auxiliary drive device for a vehicle that can reduce the power loss and at the same time reduce the required space.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention is formed into a hollow cylindrical shape as a five-way pipe of a bicycle, and a hollow portion is provided on one side and a hollow portion is provided on the other side, and a crankshaft is inserted into both end surfaces thereof. A case in which a shaft mounting hole is formed along the shaft center line, and a main drive gear for output, which is built in the storage part of the case and is integrally provided at the shaft center end of the rotor, and has a shaft center. A motor through which a central hole through which the crankshaft penetrates is bored, and the main drive gear rotates coaxially with the crankshaft;

A ratchet sleeve pivotally supported in the shaft mounting hole of the case, one end of which is fixedly in contact with the gear plate, and a shaft hole through which the crankshaft is inserted is formed in the center, and a ratchet sleeve at one end of the ratchet sleeve. A driven gear that meshes with the main driving gear is provided, a reduction gear that meshes with the driven gear is provided inside, and an output gear that is pivotally mounted on the ratchet sleeve at the other end to output is provided. A speed reducer installed in the hollow portion,

[0007] One of them is provided at a pivotal contact point between the crankshaft and the ratchet sleeve so that the crankshaft can rotate in the forward direction of the vehicle to rotate the ratchet sleeve in an interlocking manner, and the other one can be connected to the output gear. A bidirectional drive unit provided at a pivotal point of the ratchet sleeve so that the output gear rotates in the forward direction of the vehicle to rotate the ratchet sleeve in an interlocking manner.

When the crankshaft or the one-way driving unit rotates in the forward direction of the bicycle in combination, the corresponding one-way driving unit drives the ratchet sleeve to rotate the gear plates in an interlocking manner to assist the forward movement of the bicycle. Configured to drive.

The rotor of the motor is provided in the shape of a cup, the transparent void portion is recessed therein, and the peripheral edge of the transparent void portion is formed by a magnet, so that the stator of the motor is contained. And further forming the stator by winding a coil on a silicon steel piece so that the rotor can be rotated by changing the magnetic field of the stator,

The deceleration means is a planetary gear type gear set, and comprises a plurality of brackets provided with a predetermined number of driven gears at equal intervals along a peripheral edge of the disk-shaped plate body, and a ring gear. An output gear may be attached to the central part of the end face, or both of the above-mentioned one-way drive units may be formed by a ratchet and a plurality of locking teeth so as to be meshed and locked only in the case of one-way rotation, or The one-way drive unit is formed by one-way braking means assembled with a clutch type cylindrical sandwiching brake,

The driven gear of the speed reducer is a lap gear, and a large gear that meshes with the main drive gear is provided on the left side surface of the wrap gear, and a small gear is installed on the right side surface of the wrap gear, and It is more preferable that the output gear is a ring gear and the peripheral edge of the ring gear is meshed with the small gear.

According to the present invention configured as described above, when the motor is rotated by the power supply, the driving gear thereof rotates in the forward direction of the vehicle, and the driven gear meshed with the driving gear moves in the reverse direction of the forward direction of the vehicle. The output gear rotates and the output gear interlocks with the ratchet sleeve in the forward direction of the vehicle through the reduction gear that meshes with the driven gear, and the gear plate integrally connected to the ratchet sleeve rotates to assist driving the bicycle. You can move forward.

[0013]

[Embodiment of device]

 Hereinafter, the present invention will be specifically described based on an embodiment, but the present invention is not limited to this example. A first embodiment of the present invention is shown in FIG. The auxiliary drive device for a bicycle according to the present invention uses a battery 2 provided on the upper pipe 1 of the bicycle as driving energy, and a controller 3 (in the present embodiment, a lower pipe 4 for the bicycle) mounted at a proper position on the bicycle. ON / OFF or a predetermined state is controlled by (provided at the upper edge) to rotate the gear plate 5 in an interlocking manner to advance the bicycle. As can be seen by referring also to FIGS. 2 and 3, The present invention mainly includes a case 10 formed on a five-sided pipe of a bicycle, a motor 20, a ratchet sleeve 30, a speed reducer 40, a bidirectional drive unit 50, and the like, which are built in the case 10, of which,

The case 10 is a cylindrical hollow case body formed by combining the left case half body 11 and the right case half body 12 as a five-sided pipe positioned inside the gear plate 5. The left case half body 11 and the right case half body 12 are provided with shaft mounting holes 111 and 121, respectively, through which the crankshaft 13 can be inserted, at the center portions of the outer surfaces thereof, respectively, and the both are face-to-face contact with each other, as shown in FIG. A sleeve tube having a holding portion 14 formed on the left side and a hollow portion 15 provided on the inner right side in the drawing (FIG. 3) so as to extend into the holding portion 14 at the center of the left case half body 11. 16 is projected.

The motor 20 is built in the storage portion 14 of the case 10, and a stator 21 of the motor 20 is formed by winding a coil on a silicon steel piece, and a center hole 211 is formed along the center thereof. The center hole 211 is just fitted into the sleeve tube 16 of the left case half body 11 to fix the stator 21 in the case 10, and the rotor 22 of the motor 20 has a cup shape. As shown in the figure, the transparent void portion 221 is provided on the left side of the drawing, and the peripheral edge of the transparent void portion 221 is formed by a magnet so that the rotor 22 rotates by the magnetic field change of the stator 21. Further, a central hole 222 is also provided in the center of the rotor 22, and the rotor 22 is fitted and fixed around the circumference of the crank shaft 13 by the central hole 222, and at the center of the cup-shaped bottom surface of the rotor 22. A driving gear 23 is provided.

The ratchet sleeve 30 is a hollow cylindrical body that is pivotally mounted in the shaft mounting hole 121 of the case 10, and the outer edge of the ratchet sleeve 30 is firmly in contact with the gear plate 5 so that the ratchet sleeve 30 is formed inside the center. The crank shaft 13 is inserted into the shaft 31, and a plurality of locking teeth 32 are provided on the inner peripheral surface of the shaft hole 31 at the left end in the figure.

The speed reducing means 40 is a gear member installed in the hollow portion 15 of the case 10. In the present embodiment, the speed reducing means 40 is formed of a planetary gear type gear set, and the internal speed is reduced. A ring gear 41, which is a sun gear having a gear around its circumference, and a planetary gear set, which is mounted around the circumference of the crankshaft 13 by sequentially arranging a predetermined number of gears, are formed. The planetary gear sets 42 are fitted to the inner and outer two sets by fitting along the inner peripheral surface of the portion 15, and each planetary gear set 42 is assembled with the bracket 421 and a plurality of driven gears 422 to form the inner and outer planetary gear sets. Each of the brackets 421 of 42 is formed by a disc-shaped plate body, and a shaft hole 4211 is bored in the center of each plate body, and the two planetary gear sets 42 are rotated around the crankshaft 13 by the shaft hole 4211. Fasten.

Further, a plurality of driven gears 422 of each planetary gear set 42 are pivotally provided at equal intervals near the left side peripheral edge of each bracket 421 in the drawing, and the peripheral edge of each driven gear 422 is closer than the peripheral edge of the bracket 421. An output gear 423 is provided at the center of the right side surface of the bracket 421 in the drawing so that the driven gear 422 is exactly the motor 20 or the planetary gear set 42 of the previous set. The driving gear 23 and the output gear 423 are also allowed to mesh with each other.

The bidirectional drive unit 50 is a member that drives the gear plate 5 by using the crankshaft 13 and the speed reduction means 40, and is mainly formed by two sets of ratchets 51 and 52. Then, one set of the ratchets 51 is fixed at a position corresponding to the ratchet sleeve 30 of the crank shaft 13, and the ratchet pawls 511 of the ratchets 51 are engaged with the engaging teeth 32 of the ratchet sleeve 30 along the forward direction of the vehicle. In this way, another set of ratchets 52 is fixed to the power output end of the center portion of the rightmost planetary gear set 42 in the figure, and its ratchet pawls 521 also have locking teeth of the ratchet sleeve 30 along the forward direction of the vehicle. 32 so that it can be locked.

The related structure and installation position of each member in the auxiliary drive device for a bicycle of the present invention have been described above. Next, the operation of each member and the desired effect that can be achieved will be described.

As shown in FIG. 4, the motor 20 according to the present invention is fixed around the circumference of the crankshaft 13, and when the rotor 22 of the motor 20 is rotated by the electromagnetic force of the stator 21, the central portion of the cup-shaped bottom surface of the rotor 22 is rotated. The driving gear 23 provided in the vehicle simultaneously rotates in the forward direction of the vehicle, and the driven gear 422 meshed with the driving gear 23 of the inner planetary gear set 42 also rotates. However, the rotation of the driven gear 422 causes the vehicle to move forward. When the driven gear 422 rotates in the direction opposite to the forward direction of the vehicle, the bracket 421 is interlocked with the driven gear 422, because the outer periphery of the driven gear 422 meshes with the fixed and stationary ring gear 41. Then, the crankshaft 13 is rotated in the forward direction of the vehicle, and the output gear 423 of the bracket 421 is simultaneously rotated in the forward direction of the vehicle. Thus, the outer planetary gear set 42 is interlockedly rotated.

As shown in FIG. 5, the crankshaft 13 of the present invention is inserted into the axially central portion of the case 10, and the ratchet 51 rotates the ratchet sleeve 15 in one direction along the forward direction of the vehicle. Other than that, all the members in the case 10 are not interlocked, and when the motor 20 rotates to transmit power to the outer planetary gear set 42, the planetary gear set 42 is transmitted by the ratchet 52 in one direction. The ratchet sleeve 30 is interlocked with the forward direction of the vehicle to drive and rotate the gear plate 5 integrally connected to the ratchet sleeve 30 to advance the bicycle. The ratchet pawls 511 and 521 of the ratchets 51 and 52 are thus moved. Are in the same direction, but at different places, one ratchet 51 is fixed around the circumference of the crankshaft 13, and the general pedal 6 is depressed to move the gear plate 5 forward. The other ratchet 52 is fixed to the outer planetary gear set 42 and controls the operation of outputting the power of the motor 20 to drive the gear plate 5, while controlling the operation of advancing and rotating.

That is, when the rider needs auxiliary power, if the controller 3 is opened and turned on, the motor 20 obtains electric power to rotate in the forward direction of the vehicle, and the rotation speed of the planetary gear set 42 is reduced. The ratchet 52 of the outer planetary gear set 42 rotates clockwise, and its ratchet pawl engages with the engaging tooth 32 of the ratchet sleeve 30 to rotate the gear plate 5 in an interlocking manner to advance the bicycle. At this time, when the ratchet 51 of the ratchet sleeve 30 is rotated with respect to the forward rotation of the vehicle of the ratchet sleeve 30, the ratchet sleeve 30 is rotated in a direction opposite to the ratchet claw of the one ratchet 51. That is, the ratchet 51 on one side does not engage with the ratchet sleeve 30 and is in an idling state.

Therefore, when the motor 20 drives the gear plate 5, the crankshaft 13 does not rotate in an interlocking manner and does not interfere with the pedaling operation of the rider, and vice versa. When the device 3 is in the OFF state and the motor 20 is not activated, when the rider steps on the pedal 6 to rotate the crank shaft 13, the gear plate 5 rotates in conjunction with each other to advance the bicycle. The respective members in the case, such as the motor 20 and the planetary gear set 42, are not interlocked with each other, which does not increase the burden on the rider. Then, when the bicycle is advanced by driving the gear plate 5 together with the pedaling force of the rider in the present invention, most road resistance can be overcome when the gear plate 5 of the present invention is driven. Yes, that is, when a rider rides a bicycle on the same road surface, if the present invention is utilized, the bicycle can be advanced with a relatively small output to achieve the purpose of auxiliary driving.

Therefore, the auxiliary drive device for a bicycle according to the present invention adopts the motor 20 on the outside of the rotor and is fixed around the circumference of the crankshaft 13, and the crankshaft 13 is used as the direct axis and other indirect directions. Since there is no transmission device (for example, a bevel gear, etc.), the transmission of 90-degree direction change and the transmission of the power of the motor 20 by another shaft as in the prior art are not adopted, the whole system is not adopted. In terms of transmission efficiency, the output transmission loss of the motor is much lower than that of similar products, and the components such as the motor and the speed reducer are housed in the case to tightly connect the entire transmission system. The size is significantly reduced, the material is simple, it does not take up much space, and it has the advantages of the lightest weight and concealment.

6 and 7 show a second embodiment of the present invention. In the present embodiment, the case 10, the ratchet sleeve 30, the speed reducing means 40 and the one-way drive unit 50 can be formed and changed to another form by using the same principle as the above, and the case 60 is A case body in which both the left and right sides (in the figure) of the interior are hollow, and a storage section 61 for mounting the motor 20 is provided on the left side of the interior, and upper and lower hollow sections 62 and 63 are provided on the upper right and lower sides of the interior. Then, shaft mounting holes 64 through which the crankshaft 13 is inserted are formed in both left and right side walls. The side edge of the ratchet sleeve 70 is fixedly connected to the gear plate, and a locking tooth 71 is circumferentially provided on the left inner peripheral surface of the ratchet sleeve 70.

The deceleration means 80 is a compound gear system which is a combination of a lap gear 81 and a ring gear 82. The lap gear 81 is pivotally provided in the upper hollow portion 62 and the left side surface of the lap gear 81 of the motor 20. A large gear 811 that meshes with the driving gear 23 is provided, a small gear 812 is mounted on the right side surface of the lap gear 81, and the ring gear 82 is pivotally mounted in the lower hollow portion 63 to provide the ring gear. At the same time as the peripheral edge of the gear 82 is meshed with the small gear 812, a center hole 821 is formed in the center of the ring gear 82, and a plurality of locking teeth 822 are provided on the peripheral surface of the center hole 812.

The bidirectional drive unit 90 is also composed of two sets of ratchets 91 and 92, one of which is fixed around the crankshaft 13 so as to engage the ratchet sleeve 70 in the forward direction of the vehicle. On the other hand, the ratchet 92 is engaged with and fixed to the left outer peripheral surface of the ratchet sleeve 70 so as to be engaged with the stop tooth 71, and is engaged with the engagement tooth 822 in the ring gear 82 in the direction opposite to the forward direction of the vehicle. To be able to. When the above members are assembled and completed, the motor 20 drives and rotates the ring gear 82 of the speed reducer 80 in the forward direction of the vehicle and abuts and locks the ratchet sleeve 70 as shown in FIG. 8 (A). On the other hand, the ratchet 92 can rotate a gear plate (not shown).

Further, as shown in FIG. 8B, the crankshaft 13 rotates the one ratchet 91 interlockingly with the forward direction of the vehicle, and the one ratchet 91 abuts on and engages with the locking teeth 71 of the ratchet sleeve 70. As a result, a gear plate (not shown) can be rotated in an interlocking manner, thus achieving the object of the present invention.

9A and 9B show a third embodiment of the present invention. In this embodiment, the bidirectional drive unit 90 is replaced by a bidirectional drive unit 90 'having a clutch type structure, that is, the bidirectional drive unit 90' is paired with a pair of cylindrical clamping brakes 91 ', 92'. ′, So that when the ring gear 82 ′ or the crankshaft 13 moves in one direction with the ratchet sleeve 70 ′, the cylindrical clamping brakes 91 ′ and 92 ′ are subjected to a one-way braking action, so that only one direction is applied. Allow ratchet sleeve 70 'to work together. 9A shows a state in which the ratchet sleeve 70 'of the ring gear 82' is interlocked in one direction (around the hour hand), and FIG. 9B shows the ratchet sleeve 70 'of the crankshaft 13 in one direction ( The same effect of one-way transmission can be achieved in this way by showing the state of continuous movement around the hour hand.

[0031]

[Effect of device]

 According to the present invention configured as described above, the motor is directly mounted around the circumference of the crankshaft, and no other indirect transmission device is provided. There is no need to transmit the electric power of the motor through the core shaft, and the transmission efficiency of the entire system is much higher than that of similar products.In addition, the components such as the motor and the speed reducer are housed in the five-way tube case. Since the whole transmission system is tightly coupled, there is the advantage that the volume is significantly reduced and does not take up much space.

[Brief description of drawings]

FIG. 1 is an installation position display diagram of a first embodiment of the present invention.

FIG. 2 is an exploded perspective view of the first embodiment of the present invention.

FIG. 3 is an assembled sectional view of the first embodiment of the present invention.

FIG. 4 is an operation display diagram of the speed reducer according to the first embodiment of the present invention, which is a cross-sectional view taken along line IV-IV of FIG.

5 is an operation mode display diagram of the first embodiment of the present invention, which is a cross-sectional view taken along line VV of FIG. 3. FIG.

FIG. 6 is an exploded perspective view of a second embodiment of the present invention.

FIG. 7 is an assembled sectional view of a second embodiment of the present invention.

FIG. 8 is a view for explaining the operation of the second embodiment of the present invention, FIG. 8A is a state display diagram in which the ring gear rotates the gear plate in conjunction with the other ratchet sleeve;
(B) is a state display diagram in which the crankshaft interlocks with the gear plate through the one ratchet sleeve.

9A and 9B are views for explaining the operation of the third embodiment of the present invention, FIG. 9A is a view showing a state in which a ratchet sleeve is interlockingly rotated, and FIG. 9B is a crankshaft in which the ratchet sleeve is interlockingly rotating. It is a state display diagram.

[Explanation of symbols]

 5 ... Gear plate 10 ... Case 13 ... Crank shaft 20 ... Motor 30 ... Ratchet sleeve 40 ... Reduction gear 50 ... Unidirectional drive unit 51, 52 ... Ratchet

Claims (6)

[Scope of utility model registration request] 1. A shaft which is formed in a hollow cylindrical shape as a five-sided pipe of a bicycle, has a holding portion on one side and a hollow portion on the other side, and has a crankshaft extending through both end faces thereof. A case with a drilled hole and a driving gear for output, which is built into the storage part of the case and is integrated at the shaft center end of the rotor, and the crankshaft is inserted along the shaft center. And a motor in which the main drive gear rotates coaxially with the crankshaft, and is pivotally supported in the shaft mounting hole of the case, one end of which is fixedly attached to the gear plate and A ratchet sleeve having a shaft hole through which the crankshaft is inserted, and a driven gear that meshes with the main driving gear are provided at one end of the ratchet sleeve.
A reduction gear installed inside the hollow portion, which is provided with a reduction gear that meshes with the driven gear and an output gear that pivotally outputs the ratchet sleeve at the other end, and one of the reduction means The crankshaft is provided at a pivot point of the ratchet sleeve so that the crankshaft can rotate in the forward direction of the vehicle to rotate the ratchet sleeve in an interlocking manner. And the output gear rotates in the forward direction of the vehicle to rotate the ratchet sleeve in an interlocking manner, and the crankshaft or the one-way drive unit moves in the forward direction of the bicycle. When rotated, the corresponding one-way drive unit drives the ratchet sleeve to rotate the gear plates in an interlocking manner to assist the forward movement of the bicycle. Bicycle auxiliary drive made. 2. A rotor of the motor is provided in a cup shape, a transparent void portion is provided in the cup rotor, and a peripheral edge of the transparent void portion is formed by a magnet. The auxiliary drive device for a bicycle according to claim 1, wherein the stator is formed by winding a coil around a silicon steel piece so that the rotor can be rotated by changing the magnetic field of the stator. 3. The decelerating means is a planetary gear type gear set, comprising a plurality of brackets and a ring gear having a predetermined number of driven gears arranged at equal intervals along a peripheral edge of the disk-shaped plate body, The auxiliary drive device for a bicycle according to claim 1, wherein an output gear is attached to a central portion of an outer end surface of the bracket. 4. The bicycle according to claim 1, wherein each of the two unidirectional drive units is formed with a ratchet and a plurality of locking teeth so that the two unidirectional driving units are meshed with each other only when they rotate in one direction. Auxiliary drive. 5. The auxiliary drive device for a bicycle according to claim 1, wherein the one-way drive unit is formed by one-way brake means assembled by a clutch-type cylindrical clamping brake. 6. A driven gear of the speed reducing means is a lap gear, a large gear meshing with the main driving gear is provided on a left side surface of the wrap gear, and a small gear is provided on a right side surface of the wrap gear, and the speed reducing means is provided. The auxiliary drive device for a bicycle according to claim 1, wherein the output gear is a ring gear, and the periphery of the ring gear is meshed with the small gear.