JP2011131752A - Auxiliary driving device of power-assisted bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an auxiliary driving device of a power-assisted bicycle for separating an electric driving mechanism in a place except for a slope. <P>SOLUTION: This auxiliary driving device includes a main gear 4 fitted to and inserted into an output shaft 30 of a driving gear 8(8a) and rotating via a rotary shaft of an electric motor 2 and a reduction gear 10, a click 17 journaling one end by a surface of the main gear 4 and forming a claw part 23 projecting outside on the other end, an internal wheel 7 fixed to the output shaft 30 of the driving gear 8(8a) coaxial with the main gear 4 and having internal teeth 46 engaging with the claw part 23 and a frictional element 29 for rocking the claw part 23 to the outside and engaging with the internal teeth 46 arranged in the internal wheel 7, and is constituted so as to rotate a driving wheel of a bicycle connected to the driving gear 8(8a) by rotating the driving gear 8(8a) coaxial with the internal wheel 7, by rotating the internal wheel 7 by engaging the claw part 23 with the internal teeth 46 of the internal wheel 7 by rocking the click 17 to the outside by the frictional element 29 in response to rotation of the main gear 4 by the electric motor 2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an auxiliary drive device for an electrically assisted bicycle provided with an electric drive mechanism, and more particularly to an auxiliary drive device for an electrically assisted bicycle that can reduce a load caused by the electric drive mechanism during normal running by a foot pedal of the bicycle.

  Conventional power-assisted bicycles require a heavy vehicle body and a large capacity battery. Therefore, the weight of the entire bicycle increases, and even when the vehicle normally travels with the electric drive mechanism turned off, the electric drive mechanism and the wheels are connected to increase the torque to step on the pedal. I could not run lightly on a flat road like a bicycle. For this reason, some of the conventional electric assist bicycles that have been improved so as to run lightly during normal running have been proposed (Patent Documents 1 and 2).

JP-A-8-150982, page 1, First page of JP-A-8-299570

  For example, Patent Document 1 detects the degree of inclination of the front and rear wheels to cut off the electric relationship, and the electric drive mechanism does not operate on a flat road.

  Patent Document 2 relates to an electric drive assist device previously proposed by the applicant of the present application. The electric assist device is attached to a normal bicycle. In this electric assist device, a pedal is depressed on a flat road. Since the electric drive mechanism was connected while traveling, a load was applied and it was not possible to travel lightly.

Therefore, the present invention reduces the load caused by the electric drive mechanism when normal driving is performed on a flat road, and is an auxiliary drive device for an electric assist bicycle that can be easily driven by a pedal operation similar to a normal bicycle. Is to provide.
That is, according to the present invention, the electric drive mechanism and the wheel are connected only when the electric drive mechanism is driven, and when the electric drive mechanism is stopped, the rotation of the wheel is not transmitted to the electric drive mechanism, and the speed is increased and the rotation of the wheel is increased. An object of the present invention is to provide an auxiliary drive device for an electrically assisted bicycle that releases the connection with a wheel when the rotation exceeds the rotation of the drive gear of the electric drive mechanism.

  Another object of the present invention is to provide an auxiliary drive device for an electrically assisted bicycle that can reduce an impact at the time of start caused by the power of an electric drive mechanism being transmitted directly to a wheel at the time of start. .

  In order to solve the above problem, the present invention according to claim 1 is configured to drive a drive wheel by a foot pedal, rotate a drive gear by an electric motor having a clutch interposed therein, and connect the drive wheel to the drive gear. In an auxiliary drive device for an electrically assisted bicycle to be driven, a main gear that is fitted on an output shaft of a drive gear and rotates via a rotation shaft of an electric motor and a reduction gear, and one end is pivotally supported on the surface of the main gear, A click with a claw projecting outward at the end, an inner ring fixed to the output shaft of the drive gear coaxial with the main gear, and having an internal tooth with which the click claw engages, and a click claw And a friction element that engages with the internal teeth provided on the inner ring, and with the rotation of the main gear by the electric motor, the click is swung outward by the friction element to Engage with internal teeth of inner ring Allowed by rotating the interior wheel, characterized by comprising configured to rotate the linked drive wheel to the drive gear by rotating the driving gear on the interior wheel coaxially.

  In order to solve the above-mentioned problem, the present invention according to claim 2 is the auxiliary drive device for the electric assist bicycle according to claim 1, wherein the electric motor is driven on a ring-shaped gear detachably attached to the spokes of the drive wheel. It is characterized by meshing gears.

  In order to solve the above-mentioned problem, the present invention according to claim 3 is the auxiliary drive device for the electric assist bicycle according to claim 1 or 2, wherein a link movably attached in the vicinity of the click claw side is provided. The other end of the link is attached to a link ring that rotates integrally with the friction element. The click pawl is swung outward by the differential friction element, and the click pawl is engaged with the internal teeth of the interior ring. It is characterized by making it.

  In order to solve the above-mentioned problem, according to a fourth aspect of the present invention, there is provided an auxiliary drive device for an electrically assisted bicycle according to the third aspect, wherein a plurality of clicks are arranged symmetrically on the main gear.

  In order to solve the above-mentioned problem, the present invention according to claim 5 is the auxiliary drive device for the electric assist bicycle according to claim 1 or 2, wherein a ring-shaped gear is attached to the spoke of the drive wheel, An electric drive mechanism incorporating an electric motor is attached to the spoke or frame, and the drive gear connected to the rotation shaft of the electric motor of the electric drive mechanism via the clutch is engaged with the ring gear to rotate the electric motor. A shock-absorbing mechanism equipped with a spring or rubber is incorporated in the drive gear of the electric drive mechanism that rotates the drive wheel by transmitting to the drive wheel, and power is transmitted to the drive wheel while mitigating sudden output at the time of start. Features.

  In order to solve the above-mentioned problem, the present invention according to claim 6 is the auxiliary drive device for the electric assist bicycle according to claim 1 or 2, wherein a ring gear is attached to the spoke of the drive wheel, An electric drive mechanism with a built-in electric motor is attached to the spoke or frame, and the drive gear provided on the rotation shaft of the electric motor of the electric drive mechanism is engaged with the ring gear to transmit the rotation of the electric motor to the ring gear. A magnetic ring is incorporated in the output shaft of the drive wheel of the electric drive mechanism for rotating the drive wheel, and the magnetic ring is connected to the interior wheel.

  As described above, the auxiliary drive device for the electrically assisted bicycle according to the present invention has a configuration in which the novel clutch mechanism is interposed between the electrically driven mechanism and the drive wheel of the bicycle. When the clutch is engaged only when the motor is rotated and the electric motor is stopped, the drive gear connected to the drive wheel is not transmitted to the electric motor even if it is rotated to the left or right. Moreover, when the traveling speed of the bicycle increases and the rotation of the drive wheel exceeds the rotation speed of the drive gear connected to the electric motor, the clutch is idled and the connection to the drive wheel is released, so that the electric motor resists. And sudden braking is not applied.

  Further, the auxiliary drive device of the electric assist bicycle according to the present invention is driven by incorporating a ring gear on the spokes of the drive wheel of the bicycle, and incorporating a drive gear serving as an output of the electric drive mechanism attached to the frame (frame). In the method of rotating the wheel, a shock-absorbing member using a spring or rubber is incorporated in the electric drive mechanism to reduce an impact caused by transmission of power at the start.

  Furthermore, the auxiliary drive device for the electric assist bicycle according to the present invention transmits the driving force by the electric drive mechanism to the drive wheel of the bicycle only when the rotation of the drive wheel is slow, such as when starting or running on a slope. On the other hand, in the case of normal high-speed traveling on a flat road, it is possible to travel only by depressing the pedal by releasing the connection between the drive wheels and the electric drive mechanism.

  The drive assist device of the electric assist bicycle according to the present invention cuts off the connection between the electric drive mechanism and the drive wheel of the bicycle when traveling on a normal flat road, so that the battery capacity of a charger or the like is small and small. can do. Accordingly, the overall weight is light, the frictional resistance during pedal travel is reduced, and the vehicle can travel lightly even when the electric drive mechanism is not used.

  According to the auxiliary drive device for the electric assist bicycle according to the present invention, the electric drive mechanism is connected to the drive wheel by turning on the switch at the time of starting, and the electric drive disposed on the steering wheel or the like while traveling on a normal flat road. Even if the mechanism switch is turned off and the operation is stopped, the connection between the electric drive mechanism and the drive wheel of the bicycle is cut off, so the weight of the electric assist bicycle is not felt, and it runs as lightly as a normal bicycle There is an effect that can be.

  Further, according to the auxiliary drive device for the electrically assisted bicycle according to the present invention, the clutch incorporated in the main gear can be reliably connected even when the drive gear rotates at a low speed of about one rotation per minute. Unlike conventional clutches using centrifugal force in which the clutch is not connected unless the rotation of the gears is increased, there is an effect that there is no fear of sudden start.

  Further, according to the auxiliary drive device for the electrically assisted bicycle according to the present invention, even if the electric motor is turned on while the bicycle is traveling at high speed, the inner wheel of the interior wheel rotates so as to pass while pushing down the click claw. Therefore, since the clutch is not connected, there is an effect that the load on the electric drive mechanism can be reduced and the vehicle can be driven lightly. Therefore, since the clutch is not connected, the rotational force of the electric motor of the electric drive mechanism is not transmitted to the drive gear, and sudden braking due to low rotation of the electric motor does not occur, so there is no danger during traveling of the bicycle. .

  In addition, according to the auxiliary drive device for the electrically assisted bicycle according to the present invention, by incorporating a buffer mechanism between the output shaft of the main gear and the drive gear, the impact on the spokes and gears caused by the electric drive mechanism at the time of start is weakened. And can prevent breakage of the part. Furthermore, there is an effect that the drive gear can be prevented from jumping up when starting.

It is a principal part disassembled perspective view in 1st Embodiment of the auxiliary drive device of the electrically assisted bicycle which concerns on this invention. It is a plane sectional view showing a link and a click part. It is side surface sectional drawing of the auxiliary drive device of FIG. It is principal part explanatory drawing of the auxiliary drive device of FIG. It is a principal part disassembled perspective view which shows an impact absorption mechanism. It is a principal part disassembled perspective view in 2nd Embodiment of the auxiliary drive device of the electrically assisted bicycle which concerns on this invention. It is sectional drawing of the auxiliary drive device of FIG. It is explanatory drawing which shows the state which attached the auxiliary drive device of the electrically assisted bicycle which concerns on this invention to the bicycle.

  Hereinafter, an embodiment of an auxiliary drive device for an electric assist bicycle according to the present invention will be described with reference to the drawings. 1 is an exploded perspective view of a main part of an auxiliary drive device for an electric assist bicycle according to an embodiment of the present invention, FIG. 2 is a sectional view of the auxiliary drive device of FIG. 1, and FIG. 3 is a side view of the auxiliary drive device of FIG. FIG. 4 is an explanatory view of the main part of the main gear and the interior wheel of the auxiliary drive device of FIG. 1, and FIG. 5 is an exploded perspective view of the main part in the second embodiment of the auxiliary drive device of the electrically assisted bicycle according to the present invention. FIG. 6 is an exploded perspective view of an essential part of a third embodiment of an auxiliary drive device for an electric assist bicycle according to the present invention, FIG. 7 is a sectional view of the auxiliary drive device of FIG. 6, and FIG. 8 is an electric assist bicycle according to the present invention. It is explanatory drawing which shows the state which attached the auxiliary drive device of the bicycle to the bicycle.

  The auxiliary drive device 1 for an electrically assisted bicycle according to the present invention generally includes a ring gear 39 concentrically attached to a spoke 38 that connects a hub and a rim of a rear wheel 51 of a bicycle 50 that is a drive wheel. And an electric drive mechanism that can be attached to the frame of the bicycle 50. The electric drive mechanism incorporates the electric motor 2 driven by the battery 53 and is configured to rotate the ring gear 39 by the driving force of the electric motor 2. The electric drive mechanism can be detachably attached to the frame of the bicycle 50, and the ring gear 39 can also be detachably attached to the rear wheel 51 of the bicycle 50.

  The electric drive mechanism is generally configured by arranging in the casing 5 an electric motor 2, a reduction gear 10, a main gear 4 with a built-in clutch mechanism, and a drive gear 8 for rotating a ring-shaped gear 39. . A battery 53 for driving the electric motor 2 is detachably attached to an appropriate portion of the frame of the bicycle 50. The battery 53 can be a rechargeable storage battery or a dry battery. A switch for driving the electric motor 2 is attached to an appropriate position where a handle (not shown) of the bicycle 50 is easy to operate.

  The electric motor 2 is housed in the motor case 2 a and is attached to the outside of the casing 5 so that the electric motor pinion 11 of the electric motor 2 is located in the casing 5. The casing 5 is combined with the casing 6 to cover the internal mechanism. The casings 5 and 6 can be made of metal or synthetic resin such as ABS. The electric motor pinion 11 is arranged so that the reduction gear 10 is engaged with the electric motor pinion 11, and the main gear 4 with a clutch is arranged so as to be engaged with the pinion 3 of the reduction gear 10.

  Specifically, as shown in FIG. 1, a cylindrical shaft 24 is formed at a predetermined position on the inner surface of the casing 5, and a ball bearing 22 is fitted onto the shaft 24. The main gear 4 is attached to the casing 5 via The main gear 4 is provided with a concave and convex gear groove that meshes with the pinion 3 at the outer peripheral edge thereof, and a concave portion is formed in the main body portion of the main gear 4. On the surface of the recess, clicks 17 and 17 are pivotally supported at two positions near the inner wall surface of the peripheral edge so as to be swingable at symmetrical positions. The click 17 is a slightly curved rod-like member, and a hole 17a is formed in the vicinity of the open end on the tip side, and a claw 23 is formed in the vicinity of the hole 17a. Further, a pin 17b is formed on the rear end side opposite to the open end side of the click 17, and can be swung around the mounting hole 17c by being inserted into the mounting hole 17c formed on the surface of the casing 5. In such a state, it can be attached to the casing 5.

  Further, a ring-shaped friction pipe 25 is press-fitted into the shaft 24, and a ring-shaped friction element 26 is further fitted outside the friction pipe 25. A tension coil spring 26 a is disposed along the outer peripheral surface of the friction element 26, and a force acts on the tension coil spring 26 a in the direction of narrowing the size of the opening of the friction element 26. Thereby, the friction element 26 is attached so as to press the friction pipe 25. In addition, grooves 27 are provided at two positions at equal intervals on the upper surface side of the friction element 26, and the protrusions 28 provided at the lower portion of the link ring 20 described later are fitted into the grooves 27 so that they are integrated. And rotate together.

  The link wheel 20 is a ring-shaped annular member, and two attachment portions 20a are formed on the outer edge portion of the link wheel 20 so as to protrude outward at symmetrical positions, and each of the attachment portions 20a has a through hole. 20b is drilled. On the other hand, the link 21 is a plate-like member that is connected to the click 17. The first pin 21 a that is connected to the hole 17 a of the click 17 is provided on one end side, and the link wheel 20 is provided on the other end side. A second pin 21b connected to a through hole 20b drilled in the mounting portion 20a is provided. Then, the link 21 and the click 17 are movably connected to each other and the lid is covered by the click stop disk 14 from the upper part thereof. The click-stopping disk 14 is a disk-shaped member having a circular space at the center, and screw holes 14a are formed at four locations on the surface. The screws 14b are inserted into the four screw holes 14a and fixed to the screw fixing holes 17d provided in the casing 5.

  The inner ring 7 is arranged in the recess of the main gear 4 so as to cover the click stop disk 14 fixed to the casing 5. The inner ring 7 is a disk-shaped member having a concave part, and the inner teeth 46 that are hooked only when the claw part 23 of the click 17 is spread outward are symmetrical in two places on the inner side of the peripheral wall of the inner ring 7. Formed in position. The internal teeth 46 are formed with a gentle inclined surface and a steep inclined surface, and the claw portion 23 engages with the internal teeth 46 due to the difference between the rotational speed of the main gear 4 and the rotational speed of the interior ring 7. Or, the gentle inclined surface of the inner tooth 46 rotates so as to pass the claw portion 23 without being engaged. A shaft hole 7 a is provided at the center of the inner ring 7, and the inner ring 7 is arranged in the casing 5 with the output shaft 30 inserted and fixed in the shaft hole 7 a. The output shaft 30 is attached to the casing 5 and the casing 6 by a ball bearing 33 fitted in the shaft 24 and a ball bearing 32 disposed on the upper side of the central shaft 7a of the interior ring 7. In addition, in this embodiment, although the link 21, the click 17, and the internal tooth 46 are each provided in two places, this can also be arrange | positioned in three or more places, for example, four places.

  The casing 6 side of the output shaft 30 is formed to have a length that protrudes outward from the casing 6, and a key 34 that fixes a drive gear 8 to be described later is inserted into a portion protruding from the casing 6. A key groove 31 is formed along the axial direction.

  The drive gear 8 is a ring-shaped gear member having a gear groove 8a formed in the periphery thereof, and a shaft hole 42 attached to the output shaft 30 is provided at the center of rotation. A key groove 35 into which the key 34 is inserted is formed along the insertion direction of the output shaft 30. As a result, the drive gear 8 is fixed to the output shaft 30. When the main gear 4 is rotated by the driving force of the motor 2 through the reduction gear 10, the claw portion 23 of the click 21 attached to the main gear 4 meshes with the internal teeth 46 of the inner ring 7 to rotate the inner ring 7. Let Since the inner ring 7 is fixed to the output shaft 30, the rotation of the inner ring 7 rotates the output shaft 30 and rotates the drive gear 8 fixed to the output shaft 30. Then, the drive gear 8 assists the rotation of the drive wheel 51 of the bicycle 50 by rotating the ring gear 39.

  On the other hand, a buffer mechanism can be provided in order to reduce the impact when the driving force of the motor 2 is transmitted. That is, the buffer mechanism shown in FIG. 2 is configured by interposing a buffer disk 41 including a spring seat 40 in a buffer gear 8 a including a buffer spring 9 instead of the drive gear 8. The buffer gear 8 a is configured by drilling spring guides 43 that are openings at three locations along the circumferential direction in the body portion of the drive gear 8, and by arranging buffer springs 9 made of spring members in the spring guide 43. ing. Here, an elastic member such as rubber may be used instead of the buffer spring. The buffer gear 8 a is attached to the output shaft 30 via the buffer disk 41. When the buffer gear 8a is used, the buffer gear 8a is attached so as to be freely rotatable with respect to the output shaft 30 without providing a key groove in the shaft hole 42 of the buffer gear 8a.

  The buffer disk 41 is formed with a shaft 47 having a shaft hole 45 formed in the center of a disk-shaped member, and a key groove 37 is provided along the axial direction on the inner surface of the shaft hole 45. The key 34 is inserted into the key groove 37. In addition, spring seats 40 are erected at three locations on the buffer disk 41 so as to correspond to the spring guides 43 of the buffer gear 8a, and the spring seats 40 are inserted into the spring guides 43 of the buffer gear 8a to be mounted on the buffer springs 9. It arrange | positions so that the edge part of this may be supported. Further, the buffer disk 41 is fixed by a retaining ring 44 so that the shaft 47 is inserted into the shaft hole 42 of the buffer gear 8 a and the buffer gear 8 a is not detached from the shaft 47. Then, the key 34 is inserted into the key groove 31, and the buffer gear 8a is fixed by the washer 36b and the retaining ring 36a.

  As a result, the motor 2 is started and the inner ring 7 is rotated. As a result, when the output shaft 30 starts rotating, the buffer disk 41 also starts rotating at the same time, but the spring seat 40 of the buffer disk 41 compresses the buffer spring 9. Will be absorbed temporarily. Therefore, since the driving force is not directly transmitted instantaneously, it is possible to weaken the impact when starting the motor 2.

  On the other hand, in the second embodiment shown in FIG. 6, the friction element 26 is formed of a ferromagnetic material such as a magnet, and the friction element 26 is formed in a ring shape by a ferromagnetic material having a groove 27 in the upper part. And the friction pipe 25 formed using a ferromagnetic material such as iron. A flange 48 is provided at the lower part of the friction pipe 25, and the friction element 26 formed of a ferromagnetic material such as a magnet is attracted to the flange 48 and temporarily fixed to the friction pipe 25. The groove 27 is fitted with a projection 28 provided at the lower portion of the link wheel 20 so that both can be integrated and rotated together. A friction pipe 25 is disposed between the cylindrical shaft 24 inserted into the output shaft 30 and the main gear 4 with ball bearings 33 and 22 interposed therebetween, and the link 21 is pivotally supported on the link wheel 20. The click retaining disk 14 is disposed in a state where the link 21 and the click 17 are connected, the key 34 is connected to the key groove 35 of the drive gear 8 on the output shaft 30, and the retaining ring 36 is provided via the washer 36b. This is the same as in the first embodiment described above.

Next, the operation of the preferred embodiment of the auxiliary drive device for the electric assist bicycle according to the present invention will be described.
First, when the electric motor 2 is driven by turning on a switch arranged at the handle, the main gear 4 rotates via the reduction gear 10 meshed with the electric motor pinion 11 of the electric motor 2. When the main gear 4 rotates, the click 17 attached to the main gear 4 also rotates at the same time. The click 17 is connected to a link 21 having one end attached to the link ring 20, and the link ring 20 is integrated with the friction element 26, so that the link ring 20 is rotated when the click 17 supported by the main gear 4 rotates. Also rotate. Since the link ring 20 is integrated with the friction element 26, the friction element 26 also rotates together with the link ring 20. When the link wheel 20 rotates, the claw portion 23 of the click 17 is urged outward so that the connection portion between the click 21 and the link 21 is pushed by the rotation of the click 21. Then, the claw portion 23 of the click 21 meshes with the inner teeth 46 of the interior wheel 7 to be in a state where the clutch is engaged, and the shaft 30 is rotated by rotating the interior wheel 7. Since the driving gear 8 is fixed to the shaft 30 by the key 34, the driving gear 8 rotates to rotate the driving wheel (rear wheel 51) of the bicycle 50. That is, the driving force of the motor 2 is transmitted to the driving wheel (rear wheel 51). This force assists the pedaling force of the bicycle. Note that the same operation is performed when the friction element 26 of the link wheel 20 is made of the ferromagnetic material shown in the second embodiment.

  Here, when the motor 2 is turned on while the bicycle 50 is traveling at a high speed at a predetermined speed, the inner tooth 46 of the inner ring 7 rotates so as to pass while pushing down the claw 23 of the click 21. Therefore, the claw portion 23 of the click 21 does not mesh with the internal teeth 46 of the interior ring 7. In other words, the clutch is not connected. Therefore, there is no concern that the driving force of the motor 2 becomes a resistance and sudden braking is applied, causing danger to the traveling of the bicycle 50.

  Next, the operation of the auxiliary drive device incorporating a buffer mechanism by the buffer gear 8a and the buffer disk 41 will be described. First, a buffer gear 8a is rotatably fitted to the output shaft 30 and a buffer disk 41 is fixed thereto. The buffer disk 41 has a buffer spring 9 in which a spring seat 40 is disposed in a spring guide 43 of the buffer gear 8a. It arrange | positions so that the edge part of may be supported. Therefore, when the motor 2 is turned on and the motor 2 is driven, the power is transmitted to the buffer disk 41 by the above-described operation. When the buffer disk 41 starts to rotate, the spring seat 40 of the buffer disk 41 compresses the buffer spring 9 and temporarily absorbs the transmission of power, so that the driving force is not transmitted directly and the motor 2 is started. The shock will be weakened. Further, by providing a buffer mechanism, the impact applied to the gears such as the spoke 38 and the buffer gear 8a can be weakened, so that the portion can be prevented from being damaged, and the buffer gear 8a can jump up when starting. Can be prevented.

  As described above, preferred examples of the present invention have been described in detail, but the present invention is not limited to such specific embodiments, and within the scope of the gist of the present invention described in the claims, Needless to say, various modifications and changes are possible.

DESCRIPTION OF SYMBOLS 1 Auxiliary drive device 2 Electric motor 3 Pinion 4 Main gear 5 Casing 6 Casing 7 Inner ring 8 Drive gear 8a Buffer gear 9 Buffer spring 10 Reduction gear 11 Electric motor pinion 14 Click stop disk 15 Link operation wheel 17 Click 20 Link wheel 21 Link 22 Ball bearing 23 Claw portion 24 Tubular shaft 25 Friction pipe 26 Friction element (magnet)
27 Groove 28 Projection 29 Friction element 30 Output shaft 31 Key groove 32, 33 Ball bearing 34 Key 35 Key groove 36 Retaining ring 37 Groove 38 Spoke 39 Ring-shaped gear 40 Spring seat 41 Buffer disk 42 Shaft hole 43 Spring guide 44 Retaining ring 45 Shaft Hole 46 Inner teeth 47 Shaft 48 Flange 50 Bicycle 51 Rear wheel 53 Battery

Claims (6)

In the auxiliary driving device of the electrically assisted bicycle that drives the driving wheel by the foot pedal, rotates the driving gear by the electric motor with the clutch interposed, and drives the driving wheel connected to the driving gear.
A main gear that is inserted into an output shaft of the drive gear and rotates via a rotation shaft of the electric motor and a reduction gear;
A click with one end pivotally supported on the surface of the main gear and the other end formed with a claw protruding outward,
An inner ring fixed to an output shaft of the drive gear coaxial with the main gear, and having an internal tooth with which the click claw is engaged;
A friction element that swings the click claw portion outward and engages with an internal tooth provided on the inner ring;
With
With the rotation of the main gear by the electric motor, the friction element causes the click to swing outward, the click claw is engaged with the inner teeth of the interior ring, and the interior ring is rotated. An auxiliary drive device for an electrically assisted bicycle, wherein the drive wheel connected to the drive gear is rotated by rotating the drive gear on the same axis. In the auxiliary drive device of the electric assist bicycle according to claim 1,
An auxiliary drive device for an electrically assisted bicycle, wherein the drive gear of the electric motor is meshed with a ring-shaped gear that is detachably attached to a spoke of the drive wheel. In the auxiliary drive device of the electric assist bicycle according to claim 1 or 2,
The click includes a link that is movably attached in the vicinity of the click claw, and the other end of the link is attached to a link ring that rotates integrally with the friction element. An auxiliary driving device for an electrically assisted bicycle, wherein the click claw is engaged with an inner tooth of the interior wheel. In the auxiliary drive device of the electric assist bicycle according to claim 3,
An auxiliary drive device for an electrically assisted bicycle, wherein a plurality of the clicks are arranged symmetrically with respect to the main gear. In the auxiliary drive device of the electric assist bicycle according to claim 1 or 2,
A ring-shaped gear is attached to the spoke of the drive wheel, while an electric drive mechanism incorporating the electric motor is attached to the spoke or frame of the drive wheel, and a rotary shaft of the electric motor of the electric drive mechanism is interposed via a clutch. A buffer mechanism provided with a spring or rubber in the drive gear of the electric drive mechanism that meshes the connected drive gear with the ring gear and transmits the rotation of the electric motor to the ring gear to rotate the drive wheel. An auxiliary drive device for an electrically assisted bicycle, characterized in that power is transmitted to the drive wheel while mitigating rapid output at the time of starting. In the auxiliary drive device of the electric assist bicycle according to claim 1 or 2,
A ring gear is attached to the spoke of the drive wheel, while an electric drive mechanism incorporating the electric motor is attached to the spoke or frame of the drive wheel, and the drive gear provided on the rotating shaft of the electric motor of the electric drive mechanism Is connected to the ring-shaped gear to transmit the rotation of the electric motor to the ring-shaped gear to rotate the driving wheel, and a magnetic ring is incorporated in the output shaft of the driving wheel of the electric driving mechanism, and the magnetic ring is attached to the interior. An auxiliary drive device for an electrically assisted bicycle characterized by being connected to a wheel.

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