CN108749994B - Power assisting device - Google Patents
Power assisting device Download PDFInfo
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- CN108749994B CN108749994B CN201810591487.3A CN201810591487A CN108749994B CN 108749994 B CN108749994 B CN 108749994B CN 201810591487 A CN201810591487 A CN 201810591487A CN 108749994 B CN108749994 B CN 108749994B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
- B62M6/00—Rider propulsion of wheeled vehicles with additional source of power, e.g. combustion engine or electric motor
- B62M6/40—Rider propelled cycles with auxiliary electric motor
- B62M6/75—Rider propelled cycles with auxiliary electric motor power-driven by friction rollers or gears engaging the ground wheel
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Abstract
The invention discloses a power assisting device, belongs to the field of electric vehicles, and relates to a power assisting device for a manpower-driven vehicle. The first support is fixedly connected with the frame, the first end of the second support is connected with the first support in a swinging mode, the second end of the second support is fixedly connected with the power assembly, and the power assembly drives the driving wheel to rotate. When the power is not assisted, the power assembly does not rotate, and the driving wheel is not contacted with the wheel assembly; during power assisting, the power assembly starts to rotate, the feedback torque acts on the second support, the second support swings around the swinging shaft on the first support to drive the driving wheel to be in contact with the side face of the wheel assembly, the driving wheel drives the wheel assembly to rotate through friction force, and the component force of the friction force presses the driving wheel and the side face of the wheel assembly tightly. The invention does not need to disassemble the original vehicle parts, has low cost, does not contact with the wheels when the bicycle is autonomously ridden, realizes the combination and separation of the motor and the wheels by applying the feedback torque when the system is started, and solves the problems in the prior art.
Description
Technical Field
The invention discloses a power assisting device, belongs to the field of electric vehicles, relates to a manpower-driven vehicle, and particularly relates to a power assisting device for a bicycle.
Background
The manpower-driven vehicles (such as bicycles, tricycles, quadricycles and the like) can only be driven by the physical strength of a person, and the physical strength consumption of the person can be reduced if a power assisting device can be added on the manpower-driven vehicles, or the riding distance can be prolonged under the condition of certain physical strength consumption. Along with the progress of urbanization and the advocation of green traffic, people who use bicycle commuting, play are more and more, because the distance of commuting and playing is usually longer, increase the distance of riding become a demand under certain circumstances of physical power.
In the prior art, the following three solutions are provided for converting the rotary motion of a motor into the motion of a manpower-driven vehicle:
1. the wheel of the existing manpower-driven vehicle is replaced by the wheel integrated with the hub motor, the hub assembly is positioned at the wheel center, and the shell of the hub motor rotates to directly drive the wheel to rotate. However, the hub motor needs to be assembled in the center of the wheel in advance, a user needs to purchase the hub motor as an assembly, the cost of the wheel is increased, the wheel of the original vehicle has no other use after being detached, waste is caused, and the cost of the user is increased. In addition, when the user rides independently and does not need the helping hand, still need overcome the resistance of in-wheel motor idle running, the user rides hard.
2. The gear ring is additionally arranged on the inner ring of the wheel of the manpower-driven vehicle, the motor is arranged to drive the gear ring meshed with the gear to rotate, so that the wheel is driven to rotate, the cost is high in the same technology, and the motor cannot be separated from the wheel to form riding resistance when a user rides autonomously.
3. Rotate a steamboat of motor drive, the steamboat is through support and wheel tread contact use frictional force drive wheel rotatory, and the shortcoming lies in that the steamboat just is difficult to the separation after with the wheel contact, if independently ride under the state of not separating, the motor can become the resistance of riding, and user experience is poor. Therefore, the user needs to get off the bicycle manually when the assistance is not needed, and needs to get off the bicycle manually when the assistance is needed, so that the motor and the wheel are combined in a separated mode, and the operation is complex.
In conclusion, the power assisting scheme for the manual drive vehicle in the prior art has the problems of waste of original vehicle parts, high cost, large autonomous riding resistance and incapability of conveniently combining and separating the motor and the wheels. There is a need to design a power assisting device which does not change the structure of the original bicycle, makes full use of the parts of the original bicycle, has low cost and no autonomous riding resistance, and can conveniently combine and separate a motor and wheels.
Disclosure of Invention
The invention mainly aims to solve the problems of waste of original vehicle parts, high cost, large autonomous riding resistance and incapability of conveniently combining and separating a motor and wheels in the power assisting scheme of a manual drive vehicle in the prior art, and provides a power assisting device.
In order to achieve the above purpose, the scheme is as follows:
the power assisting device is fixedly connected with a frame of a manpower-driven vehicle and drives a wheel assembly to rotate, and is characterized by comprising a first bracket, a second bracket, a power assembly and a driving wheel; the first support is fixedly connected with the frame, the first end of the second support is connected with the first support in a swinging mode, the second end of the second support is fixedly connected with the power assembly, and the power assembly drives the driving wheel to rotate; when the power is not assisted, the power assembly does not rotate, and the driving wheel is not contacted with the wheel assembly; during boosting, the power assembly starts to rotate and feeds back the torque T2Acting on the second bracket to enable the second bracket to swing around the swing shaft on the first bracket to drive the driving wheel to contact with the side face of the wheel assembly.
Furthermore, the power assisting device is characterized by further comprising a limiting device and a return device; the limiting device and the return device keep the second support and the first support at initial positions and are not easy to be disturbed, and the return torque of the return device is smaller than the feedback torque T2。
Further, the power assisting device is characterized in that the axis of rotation of the driving wheel is approximately parallel to the axis of oscillation of the second bracket.
Furthermore, the power assisting device is characterized in that the rotating axis of the driving wheel is closer to the wheel assembly than the swinging axis of the second bracket; the axis of oscillation of the second carriage is rearward of the axis of rotation of the drive wheel.
Further, the booster is characterized in that when the driving wheel is in contact with the wheel assembly, the rotation axis of the driving wheel intersects with the rotation axis of the wheel assembly.
Furthermore, the power assisting device is characterized in that the energy source of the power assembly is electric energy; the power assembly can be an electric motor or a combination of the electric motor and a speed reducer.
Furthermore, the power assisting device is characterized in that the first end of the second bracket is connected with the first bracket in a swinging mode, and can be a rotary pair or a thread pair.
Furthermore, the power assisting device is characterized in that the center of the driving wheel is fixedly connected with an output shaft of the power assembly.
The invention does not need to disassemble the original vehicle parts, has low cost, does not contact with the wheels when the bicycle is autonomously ridden, realizes the combination and separation of the motor and the wheels by applying the feedback torque when the system is started, integrates the process into the assistance and the assistance release, and solves the problems in the prior art.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic view of a booster assembly mounted on a vehicle frame;
FIG. 2 is an exploded view of the booster;
FIG. 3 is a top view of FIG. 1 illustrating the principle of the drive wheel in combination with the wheel;
FIG. 4 is a top view of FIG. 1 depicting the principle of driving a wheel (hidden tire);
FIG. 5 is a view taken in the axial direction of the wheel illustrating geometric design considerations;
FIG. 6 is a schematic view of the booster assembly mounted to a vehicle frame (hidden tire);
fig. 7 depicts the principle of driving a wheel (hidden tire);
FIG. 8 is a schematic view of the booster assembly mounted to a vehicle frame;
FIG. 9 is an exploded view of the booster;
FIG. 10 depicts the principle of the drive wheel in combination with the wheel;
FIG. 11 depicts the principle of driving a wheel by a drive wheel;
in the above, fig. 1 to 5 are the first embodiment, fig. 6 and 7 are the second embodiment, and fig. 6 to 11 are the third embodiment.
Labeled as:
1. a first bracket; 11. a support position; 12. a first stopper; 13. a first hanging point;
2. a second bracket; 21. a first end; 22. a second end; 23. a second limiting block; 24. a second hanging point;
3. a power assembly;
4. a drive wheel;
5. a return element;
6. a wheel assembly;
7. a vehicle frame.
Detailed Description
The following detailed description of the embodiments of the present invention will be given with reference to the accompanying drawings for a purpose of helping those skilled in the art to more fully, accurately and deeply understand the concept and technical solution of the present invention and to facilitate its implementation.
As shown in fig. 1, the manpower-driven vehicle refers to a bicycle, a manpower tricycle, a manpower quadricycle, etc. which are powered by the physical strength of the human body, and of course, the vehicle which is designed according to the scheme of the invention and is driven only by electric power also belongs to the protection scope of the invention. The ground-contact rolling part of the manpower-driven vehicle consists of a wheel assembly 6 and a vehicle frame 7, wherein the wheel assembly 6 can be a driven wheel or a driving wheel, the center of the wheel assembly 6 is rotationally connected with the vehicle frame 7, the wheel assembly 6 and the vehicle frame 7 have no other relative motion relation except for the rotational freedom, and the wheel assembly 6 transmits various borne moments and forces to a vehicle body through the vehicle frame 7. The wheel assembly 6 is composed of a rim and a tire, wherein the rim can be of an integrally cast and injection-molded structure or a spoke and rim combined structure, and belongs to the structural description of the prior art and the application field of the invention is defined.
The first embodiment is as follows:
as shown in fig. 1 and 2, the first bracket 1 is fixedly connected with the vehicle frame 7, the first end 21 of the second bracket 2 is connected with the first bracket 1 in a swinging manner, the second end 22 of the second bracket 2 is fixedly connected with the power assembly 3, the power assembly 3 drives the driving wheel 4 to rotate, during power assistance, the driving wheel 4 is in contact with the side surface of the wheel assembly 6, the wheel assembly 6 is driven to rotate through friction force, and the component force of the friction force presses the driving wheel 4 and the side surface of the wheel assembly 6 tightly.
As shown in fig. 3, when the assist is not performed, that is, when the power unit 3 does not receive the assist command, the power unit 3 does not rotate, and the driving wheels 4 are not in contact with the wheel units 6. When the power assembly 3 receives a power-assisted command to start rotating in power assistance, driving torque T is applied to the driving wheel 41This drive torque T1Counteracting feedback torque T in opposite direction of rotation of powertrain 32Since the power assembly 3 is fixedly connected with the second bracket 2, namely, the feedback torque T2Acting on the second bracket 2 to make the second bracket 2 swing around the swing shaft on the first bracket 1, thereby driving the driving wheel 4 to contact with the side surface of the wheel assembly 6.
In addition, when the power assisting is not needed, the second bracket 2 is prevented from swinging due to bumping and vibration, so that the driving wheel 4 collides with the wheel assembly 6 to generate noise and riding resistance. Preferably, a limiting device and a return device are arranged for keeping the second bracket 2 and the first bracket 1 in the initial position and not easily disturbed. The return torque of the return device is less than the feedback torque T2I.e. feedback torque T2The second bracket 2 can be driven to rotate by overcoming the return moment.
In more detail, the present invention is described in more detail,
as shown in fig. 1 to 4, the body of the first bracket 1 is a structure that can be fixedly connected to the frame 7, preferably, a stretching body with a "C" shaped cross section is used to wrap the columnar frame 7 in the first bracket 1, and a fastening structure is arranged at an opening of the "C" shaped cross section, so that the first bracket 1 embraces the frame 7, and the fastening structure may be a bolt fastening or a quick release lever structure. The fixed connection mode of the first bracket 1 and the frame 7 can also adopt bonding, welding, rope binding and the like as long as the fixed connection between the first bracket and the frame can be realized.
The first end 21 of the second bracket 2 is connected with the first bracket 1 in a swinging way, the first bracket 1 is provided with a support position 11, the support position 11 is matched with the first end 21 in a swinging way, preferably matched with a revolute pair, and the support position 11 is provided with an upper rotating shaft and a lower rotating shaft which are respectively matched with holes of the first end 21; and a thread pair is used for replacing a rotary pair, the swing angle of the second support 2 is small, the axial displacement generated by swing can be ignored, and in addition, the thread pair also restricts the axial movement between the second support 2 and the first support 1. The second limiting block 23 is fixedly connected with the second bracket, and the second limiting block 23 is in contact with the first limiting block 12 on the first bracket 1, namely the second bracket 2 is located at an initial position. Preferably, the return element 5 is an extension spring, one end of the return element is hooked in the hole of the first support 1, and the other end of the return element is hooked in the hole of the second support 2.
The second end 22 of the second bracket 2 is fixedly connected with the power assembly 3, the power source of the power assembly 3 is electric energy which is provided by a battery stored on a manpower-driven vehicle, and the power assembly 3 rotates according to a set direction and a rotating speed required by a command when receiving a power-assisted command. The power-assisted instruction can be sent out by an accelerator operated by a rider; or a controller for monitoring the driving torque sent by the legs of the rider (such as monitoring the bicycle chain wheel torque) sends an assistance instruction according to a set strategy, so that the effect of following the leg driving is realized. The power assembly 3 may be an electric motor, or a combination of an electric motor and a speed reducer.
The peripheral surface of the driving wheel 4 is frictionThe material with larger friction coefficient is preferably rubber, and the center of the driving wheel 4 is fixedly connected with the output shaft of the power assembly 3. The drive wheel 4 is in contact with the side of the wheel assembly 6, preferably the rim side, and optionally the tyre side. The greater the sum of the moments of inertia of the drive wheel 4 and the rotor of the drive train 3, the greater the feedback moment T2The larger the size of the driving wheel 4, the more dense the main material of the driving wheel 4 should be, such as steel, copper, or metal such as lead embedded after injection molding. The axis of rotation of the driving wheel 4 is approximately parallel to the axis of oscillation of the second bracket 2, and the smaller the included angle between the two axes is, the smaller the driving torque T is1Conversion into a feedback torque T2The smoother (or understood as feedback torque T)2The larger). The acceptable range of the axis of rotation of the drive wheel 4 and the axis of oscillation of the second carriage 2 is 0 ° or more and less than 90 °. As shown in fig. 3 and 4, the axis of rotation of the driving wheel 4 is closer to the wheel assembly 6 than the axis of oscillation of the second bracket 2, and the axis of oscillation of the second bracket 2 is rearward of the axis of rotation of the driving wheel 4 (the direction tangentially opposite to the rotation of the wheel assembly 6). In order to avoid the sliding friction and unnecessary wear of the driving wheel 4 and the wheel assembly 6 when they rotate in contact with each other, the rotation axis of the driving wheel 4 intersects with the rotation axis of the wheel assembly 6 when the driving wheel 4 and the wheel assembly 6 are in contact with each other, as shown in fig. 5.
Example two:
in the first embodiment, the boosting device is arranged on one side of the wheel assembly 6, and as shown in fig. 4, the force F of the driving wheel 4 pressing against the wheel assembly 62Only by the structural strength of the wheel assembly 6, and in order to better balance this force, as shown in fig. 6 and 7, the booster of the first embodiment is arranged in a mirror image manner with respect to the equatorial plane of the wheel assembly 6, and the second embodiment is formed, that is, the two booster of the first embodiment are arranged symmetrically with respect to the equatorial plane of the wheel assembly 6, and the geometric principle is unchanged. The redundancy of the system is increased, and the reliability is improved.
When the power assemblies 3 on the two sides receive a power-assisted instruction, the output shafts rotate according to the set direction at the same time and rotate according to the rotating speed required by the instruction. As shown in FIG. 7, the wheel assembly 6 applies the reverse force to the driving wheels 4 on both sidesActing force F1And F1'，F1And F1Is parallel and opposite to the direction of rotation of the wheel assembly 6, and has the same value, F1And F1' decomposed into forces F transmitted to the swing axis along the second brackets 2 on both sides, respectively3And F3', and a force F pressing the driving wheels 4 on both sides against the wheel assembly 62And F2'，F2And F2' equal and opposite in direction, cancel each other out, and the wheel assembly 6 does not bear additional lateral force.
Example three:
as shown in fig. 8 to 11, in the first embodiment, the entire power assist device is rotated by 90 ° so that the drive wheel 4 contacts the inner circumferential surface of the rim of the wheel assembly 6, and when the drive wheel 4 contacts the inner circumferential surface of the rim, the rotation axis of the drive wheel 4 is parallel to the axis of the wheel assembly 6, and the third embodiment is obtained, the radial force generated during driving is received by the wheel assembly 6, and the radial strength of the wheel assembly 6 is large, and the radial force does not adversely affect the structure of the wheel assembly 6.
As shown in fig. 8 and 9, the first bracket 1 is fixedly connected with the frame 7, the first end 21 of the second bracket 2 is connected with the first bracket 1 in a swinging manner, the second end 22 of the second bracket 2 is fixedly connected with the power assembly 3, the power assembly 3 drives the driving wheel 4 to rotate, and during power assistance, the driving wheel 4 is in contact with the inner circumferential surface of the rim of the wheel assembly 6.
As shown in fig. 10, when the assist force is not applied, that is, when the power train 3 does not receive the assist force command, the power train 3 does not rotate, and the drive wheels 4 are not in contact with the wheel assembly 6. When the power assembly 3 receives a power-assisted command to start rotating in power assistance, driving torque T is applied to the driving wheel 41This drive torque T1Counteracting feedback torque T in opposite direction of rotation of powertrain 32Since the power assembly 3 is fixedly connected with the second bracket 2, namely, the feedback torque T2Acting on the second bracket 2 to make the second bracket 2 swing around the swing shaft on the first bracket 1, thereby driving the driving wheel 4 to contact with the inner circumferential surface of the rim of the wheel assembly 6.
In addition, when the boosting force is not needed, the second bracket 2 is prevented from swinging due to bumping and vibration, so that the driving wheel 4 collides with the wheel assembly 6 to generate noise and rideResistance force. Preferably, a limiting device and a return device are arranged for keeping the second bracket 2 and the first bracket 1 in the initial position and not easily disturbed. The return torque of the return device is less than the feedback torque T2I.e. feedback torque T2The second bracket 2 can be driven to rotate by overcoming the return moment. When the second bracket 2 and the fixed connection object are subjected to the return action generated by gravity, a return device can be omitted, and as shown in fig. 11, the gravity direction is downward.
In more detail, the present invention is described in more detail,
as shown in fig. 8 to 11, the body of the first bracket 1 is a structure that can be fixedly connected to the frame 7, preferably, a stretching body with a "C" shaped cross section is used to wrap the columnar frame 7 in the first bracket 1, and a fastening structure is arranged at an opening of the "C" shaped cross section, so that the first bracket 1 embraces the frame 7, and this fastening structure may be a bolt fastening or a quick release lever structure. The fixed connection mode of the first bracket 1 and the frame 7 can also adopt bonding, welding, rope binding and the like as long as the fixed connection between the first bracket and the frame can be realized.
The first end 21 of the second bracket 2 is connected with the first bracket 1 in a swinging way, the first bracket 1 is provided with a support position 11, the support position 11 is matched with the first end 21 in a swinging way, preferably matched with a revolute pair, and the support position 11 is provided with an upper rotating shaft and a lower rotating shaft which are respectively matched with holes of the first end 21; and a thread pair is used for replacing a rotary pair, the swing angle of the second support 2 is small, the axial displacement generated by swing can be ignored, and in addition, the thread pair also restricts the axial movement between the second support 2 and the first support 1. The second limiting block 23 is fixedly connected with the second bracket, and the second limiting block 23 is in contact with the first limiting block 12 on the first bracket 1, namely the second bracket 2 is located at an initial position. Preferably, the return element 5 is an extension spring, one end of the return element is hooked in the hole of the first support 1, and the other end of the return element is hooked in the hole of the second support 2.
The second end 22 of the second bracket 2 is fixedly connected with the power assembly 3, the power source of the power assembly 3 is electric energy which is provided by a battery stored on a manpower-driven vehicle, and the power assembly 3 rotates according to a set direction and a rotating speed required by a command when receiving a power-assisted command. The power-assisted instruction can be sent out by an accelerator operated by a rider; or a controller for monitoring the driving torque sent by the legs of the rider (such as monitoring the bicycle chain wheel torque) sends an assistance instruction according to a set strategy, so that the effect of following the leg driving is realized. The power assembly 3 may be an electric motor, or a combination of an electric motor and a speed reducer.
The peripheral surface of the driving wheel 4 is made of a material with a large friction coefficient, preferably rubber, and the center of the driving wheel 4 is fixedly connected with an output shaft of the power assembly 3. The drive wheel 4 is in contact with the inner peripheral surface of the rim of the wheel assembly 6. The greater the sum of the moments of inertia of the drive wheel 4 and the rotor of the drive train 3, the greater the feedback moment T2The larger the size of the driving wheel 4, the more dense the main material of the driving wheel 4 should be, such as steel, copper, or metal such as lead embedded after injection molding. The axis of rotation of the driving wheel 4 is approximately parallel to the axis of oscillation of the second bracket 2, and the smaller the included angle between the two axes is, the smaller the driving torque T is1Conversion into a feedback torque T2The smoother (or understood as feedback torque T)2The larger). The acceptable range of the axis of rotation of the drive wheel 4 and the axis of oscillation of the second carriage 2 is 0 ° or more and less than 90 °. As shown in fig. 10 and 11, the axis of rotation of the driving wheel 4 is closer to the edge of the wheel assembly 6 than the axis of oscillation of the second bracket 2, and the axis of oscillation of the second bracket 2 is rearward of the axis of rotation of the driving wheel 4 (the direction tangentially opposite to the rotation of the wheel assembly 6). In order to avoid the sliding friction and unnecessary wear of the driving wheel 4 and the wheel assembly 6 when they rotate in contact with each other, when the driving wheel 4 and the wheel assembly 6 are in contact with each other, the rotation axis of the driving wheel 4 is in the same plane as the rotation axis of the wheel assembly 6, and further, the rotation axis of the driving wheel 4 is parallel to the rotation axis of the wheel assembly 6.
The above embodiments may be applied to all wheels of a human powered vehicle, or to partial wheels, constituting partial wheel drive or all wheel drive, and the solutions of the embodiments for different wheel applications of the same human powered vehicle may be combined arbitrarily.
The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A power assisting device is fixedly connected with a frame (7) of a manpower-driven vehicle and drives a wheel assembly (6) to rotate, and is characterized by comprising a first bracket (1), a second bracket (2), a power assembly (3) and a driving wheel (4);
the first support (1) is fixedly connected with the frame (7), the first end (21) of the second support (2) is connected with the first support (1) in a swinging mode, the second end (22) of the second support (2) is fixedly connected with the power assembly (3), and the power assembly (3) drives the driving wheel (4) to rotate;
when the power assisting is not carried out, the power assembly (3) does not rotate, and the driving wheel (4) is not contacted with the wheel assembly (6);
during power assisting, the power assembly (3) starts to rotate, and a feedback torque T2 generated by the rotation of the power assembly (3) acts on the second bracket (2) to enable the second bracket (2) to swing around the swing shaft on the first bracket (1) so as to drive the driving wheel (4) to contact with the side face of the wheel assembly (6).
2. The booster of claim 1 further comprising a stop means and a return means;
the second support (2) and the first support (1) are kept at the initial position by the limiting device and the return device and are not easily disturbed, and the return torque of the return device is smaller than the feedback torque T2。
3. The booster of claim 1,
the axis of rotation of the driving wheel (4) is approximately parallel to the axis of oscillation of the second bracket (2).
4. The booster of claim 1,
the axis of rotation of the driving wheel (4) is closer to the wheel assembly (6) than the axis of swing of the second bracket (2);
the axis of oscillation of the second support (2) is rearward of the axis of rotation of the drive wheel (4).
5. The booster of claim 1,
when the driving wheel (4) is in contact with the wheel assembly (6), the rotation axis of the driving wheel (4) intersects with the rotation axis of the wheel assembly (6).
6. A booster according to claim 1, characterised in that the energy source of the power pack (3) is electric energy;
the power assembly (3) is an electric motor or a combination of the electric motor and a speed reducer.
7. A force assist arrangement according to claim 1, wherein the first end (21) of the second support (2) is pivotally connected to the first support (1).
8. A booster according to claim 1, characterised in that the centre of the drive wheel (4) is fixedly connected to the output shaft of the power unit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810591487.3A CN108749994B (en) | 2018-06-10 | 2018-06-10 | Power assisting device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810591487.3A CN108749994B (en) | 2018-06-10 | 2018-06-10 | Power assisting device |
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| CN108749994A CN108749994A (en) | 2018-11-06 |
| CN108749994B true CN108749994B (en) | 2020-09-11 |
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Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5078227A (en) * | 1989-06-18 | 1992-01-07 | S. A. E. Akikim | Auxiliary drive for vehicles |
| CN201587511U (en) * | 2010-01-15 | 2010-09-22 | 万线实业有限公司 | Bicycle assisting-power driving device |
| FR2998858B1 (en) * | 2012-12-05 | 2014-11-21 | Michelin & Cie | ELECTRICAL ASSISTANCE DEVICE FOR BICYCLE AND ELECTRONICALLY ASSISTED BIKE EQUIPPED WITH SAID DEVICE |
| CN106143778A (en) * | 2015-04-01 | 2016-11-23 | 鸿富锦精密工业（深圳）有限公司 | Bicycle and electric booster thereof |
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2018
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Effective date of registration: 20200811 Address after: 221200 North Bank of the East Suibei River, pisui Road, Donglou village, Qing'an Town, Suining County, Xuzhou City, Jiangsu Province Applicant after: Xuzhou tianfuda Plastic Industry Co.,Ltd. Address before: 241009 Taishan Road, Anhui city of Wuhu Province Economic and Technological Development Zone No. 18 new city 7-1204 Applicant before: Yu Jingyuan |
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