CN114684318A - Central-positioned driving device and power-assisted bicycle - Google Patents
Central-positioned driving device and power-assisted bicycle Download PDFInfo
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- CN114684318A CN114684318A CN202210253220.XA CN202210253220A CN114684318A CN 114684318 A CN114684318 A CN 114684318A CN 202210253220 A CN202210253220 A CN 202210253220A CN 114684318 A CN114684318 A CN 114684318A
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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
- B62M6/55—Rider propelled cycles with auxiliary electric motor power-driven at crank shafts parts
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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
- B62M23/00—Transmissions characterised by use of other elements; Other transmissions
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/10—Structural association with clutches, brakes, gears, pulleys or mechanical starters
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Power Engineering (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
Abstract
The invention relates to a central driving device and a power-assisted bicycle, which comprise a central shaft and a driving device, wherein the driving device is sleeved outside the central shaft: the hollow motor comprises a shell, a stator and a rotor, wherein the stator and the rotor are sequentially arranged in the shell, and the shell is rotationally connected with the middle shaft; the harmonic reducer comprises a wave generator, a flexible gear and a rigid gear, wherein the wave generator is connected with the rotor, and one end face of the rigid gear is connected with the end face of the shell; and the transmission part comprises an output shaft and a shell, two ends of the outer side of the output shaft are rotationally connected with the inner wall of the shell, two ends of the inner side of the output shaft are respectively connected with the middle shaft and the flexible gear in a torque-resisting manner, and the end surface of the shell is connected with the other end surface of the rigid gear. The invention takes the rigid wheel as a part of the shell, the rigid wheel is stably connected, the structure is simple, the size of the driving device is small, and the attractiveness of the power-assisted bicycle is ensured.
Description
Technical Field
The invention relates to the technical field of transmission devices, in particular to a central driving device and a power-assisted bicycle.
Background
Electric bicycle is an electronic supplementary bicycle of riding, with ordinary bicycle difference lie in, electric bicycle adopts the hybrid mode of "manpower + electric power", existing bicycle light and handy and convenience can effectively compensate bicycle uphill again, contrary wind, the burden when carrying the thing, the power-assisted that electric power provided has not only solved the hard problem of bicycle of riding, the drive of cooperation manpower simultaneously, the continuation of the journey mileage is big, realize long-distance riding, make traditional bicycle technique thoroughly reform.
In the prior art, a power-assisted bicycle, particularly a two-wheeled electric bicycle, mostly uses a rear hub planetary gear transmission device, and has lower speed reduction ratio and heavier weight, so that the required power for an electric motor is higher, the endurance of a battery is further influenced, the torque is small when the bicycle is started or climbs a slope, and the response speed is slow; meanwhile, the noise is high, the transmission precision is low, and the comfort level of a user during riding is influenced; and the transmission volume is large, the moving is difficult, and the aesthetic design of the appearance of the electric moped is influenced.
Chinese patent application publication CN101121427A discloses a harmonic speed-reducing electric bicycle. The electric bicycle is mainly characterized in that on the basis of the existing electric bicycle structure, a harmonic speed reduction driver (transmission mechanism) is arranged in an enlarged bicycle support five-way and runs on a bicycle middle shaft, and after the motor power and the manpower are combined in a power combining mechanism, the bicycle is driven to run through a bicycle chain and a mechanical speed change mechanism. However, the driving mechanism has large volume, poor sealing performance and high cost, and is difficult to realize mass production on the electric bicycle.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defects in the prior art and provide a middle-mounted driving device with small volume, simple structure and good sealing performance.
In order to solve the above technical problems, the present invention provides a central driving device, which comprises a central shaft, and a driving device sleeved outside the central shaft:
the hollow motor comprises a shell, a stator and a rotor, wherein the stator and the rotor are sequentially arranged in the shell, and the shell is rotationally connected with the middle shaft;
the harmonic reducer comprises a wave generator, a flexible gear and a rigid gear, wherein the wave generator is connected with the rotor, and one end face of the rigid gear is connected with the end face of the casing;
and the transmission part comprises an output shaft and a shell, two ends of the outer side of the output shaft are rotationally connected with the inner wall of the shell, two ends of the inner side of the output shaft are respectively connected with the middle shaft and the flexible gear in a torque-resisting manner, and the end surface of the shell is connected with the other end surface of the rigid gear.
In one embodiment of the invention, two end faces of the rigid wheel are provided with sealing grooves, and a sealing ring is clamped between the sealing groove and the shell.
In an embodiment of the invention, a transition inclined plane is arranged at one end of the shell connected with the rigid wheel, and the locking bolt penetrates through the transition inclined plane and the rigid wheel to be locked with the shell.
In one embodiment of the invention, two ends of the rigid wheel are provided with shoulders corresponding to the inner surfaces of the shell and the shell.
In one embodiment of the present invention, the output shaft includes a first output member and a second output member, one end of the first output member is fixedly connected to the flexible gear, the other end of the first output member is connected to the second output member through a one-way transmission member, and the other end of the second output member is connected to the middle shaft through a one-way transmission member.
In one embodiment of the invention, the one-way transmission is a one-way clutch.
In one embodiment of the invention, the one-way transmission member is a one-way bearing.
In one embodiment of the invention, an axon is arranged at a position, corresponding to the inside of the output shaft, of the middle shaft, and the output shaft and the axon are connected through a one-way transmission piece.
In one embodiment of the invention, the periphery of the casing is provided with heat dissipation fins, and the heat dissipation fins are integrally formed with the casing.
In one embodiment of the invention, the harmonic reducer is a cup harmonic.
A power-assisted bicycle comprises the driving device.
Compared with the prior art, the technical scheme of the invention has the following advantages:
the driving device and the moped provided by the invention have the advantages that the rigid wheel is used as one part of the shell, so that the rigid wheel is convenient to mount and stable in connection, the size of the driving device is reduced, and the attractiveness of the moped is improved.
Drawings
In order that the present disclosure may be more readily and clearly understood, reference is now made to the following detailed description of the embodiments of the present disclosure taken in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention;
fig. 3 is a cross-sectional view of a second embodiment of the present invention.
Description reference numbers indicate: 10. a middle shaft; 11. an axon;
20. a hollow motor; 21. a housing; 22. a stator; 23. a rotor; 24. a heat dissipating blade;
30. a harmonic reducer; 31. a wave generator; 32. a flexible gear; 33. a rigid wheel; 34. a sealing groove; 35. treating the shoulders;
40. a transmission section; 41. an output shaft; 411. a first output member; 412. a second output member; 42. a housing; 43. locking the bolt; 44. a transition bevel; 45. a one-way transmission member; 451. a one-way clutch; 452. a one-way bearing.
Detailed Description
The present invention is further described below in conjunction with the following figures and specific examples so that those skilled in the art may better understand the present invention and practice it, but the examples are not intended to limit the present invention.
Referring to fig. 1 and 2, a schematic structural diagram of a central drive device according to the present invention is shown. The driving device comprises a central shaft 10 and is sleeved outside the central shaft 10:
the hollow motor 20 comprises a casing 21, a stator 22 and a rotor 23, wherein the stator 22 and the rotor 23 are sequentially arranged in the casing 21, and the casing 21 is rotatably connected with the middle shaft 10;
the harmonic reducer 30 comprises a wave generator 31, a flexible gear 32 and a rigid gear 33, wherein the wave generator 31 is connected with the rotor 23, and one end face of the rigid gear 33 is connected with the end face of the machine shell 21;
the transmission part 40 comprises an output shaft 41 and a shell 42, two ends of the outer side of the output shaft 41 are rotatably connected with the inner wall of the shell 42, two ends of the inner side of the output shaft 41 are respectively connected with the middle shaft 10 and the flexible gear 32 in a torque-resistant manner, and the end face of the shell 42 is connected with the other end face of the rigid gear 33.
In this embodiment, it is understood that torque-resistant coupling means that torque can be transmitted between the two. When the hollow motor 20 does not work, the two ends of the middle shaft 10 are connected with pedal shafts to drive the middle shaft 10 to rotate, the middle shaft 10 drives the output shaft 41 to rotate, the end part of the output shaft 41 is connected with a chain wheel, so that the chain wheel is driven, at the moment, the hollow motor 20 does not move, the flexible wheel 32 does not rotate, the connection between the flexible wheel 32 and the output shaft 41 is disconnected, and the manual driving of the power-assisted bicycle is realized. When the central shaft 10 rotates and receives a certain torque, the hollow motor 20 is started, and the output torque of the hollow motor 20 is matched with the torque received by the central shaft 10. The rotor 23 rotates, which rotates the wave generator 31. The wave generator 31 deforms the flexible gear 32, the long shaft end of the flexible gear 32 is meshed with the rigid gear 33, the short shaft end is completely separated from the rigid gear 33, the meshing state of the flexible gear 32 and the rigid gear 33 is changed along with the rotation of the wave generator 31, and therefore the flexible gear 32 rotates slowly relative to the rigid gear 33 along the opposite direction of the wave generator 31, and speed reduction is achieved. After the harmonic reducer 30 is decelerated, the output is output to the output shaft 41 by the flexible gear 32, because the rotating speed of the flexible gear 32 is faster than that of the center shaft 10, the connection between the center shaft 10 and the output shaft 41 is disconnected, the output shaft 41 is driven by the flexible gear 32, and then the chain wheel connected with the output shaft 41 rotates, so that the electric power assistance of the power-assisted bicycle is realized.
In this embodiment, the harmonic reducer 30 has high transmission efficiency, and meets the efficiency requirement of the bicycle. Meanwhile, the shell 21, the rigid wheel 33 and the shell 42 jointly form a complete shell, on one hand, the components are sealed in the shell, the driving device is prevented from being rusted by the external environment, the harmonic reducer 30 does not need to be frequently oiled, the service life of the driving device is prolonged, on the other hand, the transmission part 40 and the hollow motor 20 are conveniently assembled together with the harmonic reducer 30 after being assembled respectively, the harmonic reducer 30 is fixed more conveniently and firmly, and the shape of the rigid wheel 33 cannot be influenced. Furthermore, because the driving device has torque during operation, the casing 21 and the shell 42 are both made of aluminum alloy materials and have lower strength, the rigid wheel 33 has higher strength, the casing 21 and the shell 42 are connected together through the rigid wheel 33, the strength of the casing is improved, the service life of the driving device is further prolonged, the rigid wheel 33 is used as one part of the casing, the casing does not need to be arranged outside the rigid wheel 33, the outer diameter of the rigid wheel 33 is the maximum size of the driving device, and the size of the driving device is greatly reduced. In order to realize a small size of the driving apparatus, the harmonic reducer 30 is selected as the cup-shaped harmonic reducer 30.
In a preferred embodiment of the present invention, in order to ensure the sealing at the connection between the rigid wheel 33 and the housing 42 and the casing 21, sealing grooves 34 are provided on both end surfaces of the rigid wheel 33, and a sealing ring is clamped between the sealing groove 34 and the housing 21 and the housing 42. The sealing ring is clamped in the sealing groove 34, and the section size of the sealing ring is larger than that of the sealing groove 34, so that when the shell 42, the rigid wheel 33 and the machine shell 21 are locked, the sealing ring is extruded and deformed to fill gaps among the sealing groove 34, the shell 42, the rigid wheel 33 and the machine shell 21, full sealing is ensured, and the sealing ring cannot generate displacement due to the limitation of the sealing groove 34.
In the preferred embodiment of the present invention, the housing 42, the rigid wheel 33 and the housing 21 are distributed along the axial direction thereof, so that they should be locked in the axial direction. Because the lengths of the housing 42 and the housing 21 are long, and the stator 22 is connected in the housing 21, a transition inclined surface 44 is arranged at one end of the housing 42 connected with the rigid wheel 33, and the locking bolt 43 passes through the transition inclined surface 44 and the rigid wheel 33 to be locked with the housing 21. The output shaft 41 in the housing 42 is smaller in size so that the end of the housing 42 remote from the rigid wheel 33 can be made smaller in size so that the end of the housing 42 can have a projection connected to the rigid wheel 33, which has a shorter length to facilitate the passage of the locking bolt 43 for locking the housing 42, the rigid wheel 33 and the casing 21. Because the driving device has torque during operation, if the sizes of the two ends of the shell 42 suddenly change, stress concentration is easily caused, and the service life of the shell 42 is affected, so that the transition inclined plane 44 is arranged on the shell 42 in the embodiment, the shell 42 is conveniently connected, and the strength of the shell 42 is not affected.
In the working process, the flexible gear 32 is partially meshed with the rigid gear 33, the part where the flexible gear 32 is meshed with the rigid gear 33 has torsion and outward extrusion force on the rigid gear 33, the rigid gear 33 is connected with the shell 42 and the machine shell 21 through the locking bolt 43, a gap is necessarily reserved between the rigid gear 33 and the locking bolt 43, and in order to prevent the rigid gear 33 from shaking under the condition that the flexible gear 32 rotates and influence the connection of the rigid gear 33 with the shell 42 and the machine shell 21, two ends of the rigid gear 33 are provided with shoulders 35 corresponding to the inner surfaces of the shell 42 and the machine shell 21. The shoulder 35 abuts against the inner surfaces of the housing 42 and the casing 21, and the extrusion force of the flexible gear 32 on the rigid gear 33 is transmitted to the housing 42, the rigid gear 33 and the casing 21 simultaneously, so that the rigid gear 33 does not shake relative to the housing 42 and the casing 21, and the connection stability is ensured.
As a preferred embodiment of the present invention, in order to realize the free disconnection of the anti-torque connection between the output shaft 41 and the middle shaft 10 and the harmonic reducer 30, when the speed of the middle shaft 10 driving the output shaft 41 is lower than the speed of the flexible gear 32 of the harmonic reducer 30, the hollow motor 20 can transmit the torque to the output shaft 41 through the flexible gear 32, and prevent the output shaft from dragging the middle shaft 10 to rotate; when the speed of the output shaft 41 driven by the middle shaft 10 is higher than the speed of the flexible gear 32, the output shaft 41 is prevented from reversely dragging the hollow motor 20 to rotate, and the one-way transmission members 45 are arranged between the middle shaft 10 and the output shaft 41 and between the flexible gear 32 and the output shaft 41. Because the flange of flexspline 32 is short in the axial length, inconvenient with one-way transmission 45 links to each other, so output shaft 41 includes first output 411 and second output 412, first output 411 one end with flexspline 32 fixed connection, the other end pass through one-way transmission 45 with second output 412 links to each other, one-way transmission 45 sets up between first output 411 and second output 412, the other end of second output 412 pass through one-way transmission 45 with shell 42 is rotated and is connected. Thereby improving the safety performance and reducing the energy loss. Specifically, referring to fig. 2, in the first embodiment of the present invention, the one-way transmission element 45 is a one-way clutch 451. The one-way clutch 451 does not need to provide a supporting function, so that the installation precision is low, and the installation is convenient. Referring to fig. 3, in the second embodiment of the present invention, the one-way transmission element 45 may also be a one-way bearing 452. Due to the large radial thickness of the one-way bearing 452, the second output member 412 may be designed in two parts to facilitate mounting of the second output member 412.
In order to match the size of the flexible gear 32, the distance between the inner periphery of the output shaft 41 and the outer periphery of the middle shaft 10 is large, in order to realize the rotary connection between the output shaft 41 and the middle shaft 10, an axon 11 is arranged at the position of the middle shaft 10 corresponding to the inner part of the output shaft 41, and the output shaft 41 is connected with the axon 11 through a one-way transmission piece. The axon 11 is arranged to ensure that the clearance between the middle shaft 10 and the output shaft 41 is matched with the radial thickness of the one-way transmission piece on one hand, and limit the positions of the connecting pieces on the other hand, so that the connecting pieces are prevented from generating displacement along the axial direction of the middle shaft 10.
Further, in the continuous working process, hollow motor 20 can produce a large amount of heat, and in order to improve the heat dissipation effect and avoid the heat accumulation from influencing the performance of hollow motor 20, heat dissipation blades 24 are arranged on the periphery of casing 21. The heat radiating fins 24 are integrally formed with the housing 21.
The invention also provides a power-assisted bicycle which comprises the driving device. The driving device is arranged at a five-way pipe of the power-assisted bicycle, and the power-assisted bicycle can be a tool for riding instead of walk which is driven by manpower and electric power at will.
When the bicycle is ridden by manpower, the pedal shaft drives the middle shaft 10 to rotate, the middle shaft 10 drives the second output part 412 to rotate through the one-way clutch 451, the chain wheel connected with the second output part 412 rotates, and the power-assisted bicycle is started. When the power-assisted bicycle starts or goes up a slope, the rotation speed of the middle shaft 10 is slow, and the rotation speed of the second output part 412 is slow and is subjected to a certain torque force, so that the hollow motor 20 is started. The hollow motor 20 drives the wave generator 31 of the harmonic reducer 30 to rotate, the flexible gear 32 continuously changes the meshing position with the rigid gear 33 along with the rotation of the wave generator 31, and the flexible gear 32 can rotate for a circle after the wave generator 31 rotates for a plurality of circles due to the difference of the number of teeth between the flexible gear 32 and the rigid gear 33, so that a larger reduction ratio is realized. The flexible gear 32 transmits torque to the first output part 411, the rotating speed of the first output part 411 is larger than that of the second output part 412, the one-way clutch 451 of the first output part 411 and the second output part 412 is in a closed state, the first output part 411 drives the second output part 412 to rotate rapidly, the one-way clutch 451 between the second output part 412 and the middle shaft 10 is in an open state, and the chain wheel is driven to rotate by the hollow motor 20, so that electric power assistance of the power-assisted bicycle is achieved. When the road is flat, manpower can be ridden without any effort, at this time, the rotation speed of the central shaft 10 is high, the received torque force is small, the rotation speed of the hollow motor 20 is unchanged, the reduction ratio of the harmonic reducer 30 is unchanged, the rotation speed of the flexible gear 32 and the first output element 411 is unchanged, the rotation speed of the central shaft 10 is greater than that of the flexible gear 32, the one-way clutch 451 between the central shaft 10 and the second output element 412 is in a closed state, the second output element 412 is driven by the central shaft 10, the one-way clutch 451 between the second output element 412 and the first output element 411 is disconnected, and the second output element 412 is not assisted by power any more, so that complete manpower driving is realized. The peripheral size of the driving device of the invention is determined by the harmonic reducer 30, the volume is small, the appearance is not influenced after the driving device is arranged on the moped, the structure is simple, and the installation is convenient.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (11)
1. The central driving device is characterized by comprising a central shaft and a driving device, wherein the driving device is sleeved outside the central shaft:
the hollow motor comprises a shell, a stator and a rotor, wherein the stator and the rotor are sequentially arranged in the shell, and the shell is rotationally connected with the middle shaft;
the harmonic reducer comprises a wave generator, a flexible gear and a rigid gear, wherein the wave generator is connected with the rotor, and one end face of the rigid gear is connected with the end face of the shell;
and the transmission part comprises an output shaft and a shell, two ends of the outer side of the output shaft are rotationally connected with the inner wall of the shell, two ends of the inner side of the output shaft are respectively connected with the middle shaft and the flexible gear in a torque-resisting manner, and the end surface of the shell is connected with the other end surface of the rigid gear.
2. The central drive device according to claim 1, wherein sealing grooves are arranged on two end faces of the rigid wheel, and sealing rings are clamped between the sealing grooves and the casing and between the sealing grooves and the casing.
3. The central drive unit according to claim 1, wherein the end of the housing connected to the rigid wheel is provided with a transition slope, and the locking bolt passes through the transition slope and the rigid wheel and is locked with the housing.
4. The central drive of claim 1, wherein said rigid wheel is provided at both ends with shoulders corresponding to the inner surfaces of said housing and case.
5. The central drive of claim 1, wherein the output shaft comprises a first output member and a second output member, the first output member is fixedly connected to the flexible gear at one end, the second output member is connected to the second output member through a one-way transmission member at the other end, and the second output member is connected to the central shaft through a one-way transmission member at the other end.
6. A central drive according to claim 5, wherein the one-way transmission is a one-way clutch.
7. The central drive of claim 5, wherein the one-way transmission member is a one-way bearing.
8. The central drive device according to claim 1, wherein the central shaft is provided with an axon corresponding to the position inside the output shaft, and the output shaft is connected with the axon through a one-way transmission member.
9. The central drive unit according to claim 1, wherein the housing is provided with heat dissipating fins at its periphery, and the heat dissipating fins are integrally formed with the housing.
10. The central drive of claim 1, wherein the harmonic reducer is a cup harmonic.
11. A power assisted bicycle, comprising a drive device according to any of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210253220.XA CN114684318B (en) | 2022-03-15 | 2022-03-15 | Centrally-mounted driving device and power-assisted bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210253220.XA CN114684318B (en) | 2022-03-15 | 2022-03-15 | Centrally-mounted driving device and power-assisted bicycle |
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| Publication Number | Publication Date |
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| CN114684318A true CN114684318A (en) | 2022-07-01 |
| CN114684318B CN114684318B (en) | 2023-09-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210253220.XA Active CN114684318B (en) | 2022-03-15 | 2022-03-15 | Centrally-mounted driving device and power-assisted bicycle |
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| CN (1) | CN114684318B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI822580B (en) * | 2023-02-03 | 2023-11-11 | 宏國學校財團法人宏國德霖科技大學 | Downsizing electric bicycle booster |
| WO2024066552A1 (en) * | 2022-09-29 | 2024-04-04 | 浙江联宜电机有限公司 | Mid-drive electric motor for electric power-assisted bicycle |
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| CN2894047Y (en) * | 2006-03-20 | 2007-04-25 | 上海中广电动车有限公司 | Electric bicycle harmonic reducing speed driving device |
| CN202449162U (en) * | 2011-11-30 | 2012-09-26 | 张源琪 | Harmonic speed reducing driver for electric bicycle |
| CN106936261A (en) * | 2017-04-10 | 2017-07-07 | 南京信息工程大学 | Flexbile gear output harmonic wave all-in-one |
| CN209444758U (en) * | 2018-10-29 | 2019-09-27 | 广东省机械研究所 | A kind of direct-drive type harmonic speed reducer transmission device |
| CN112224327A (en) * | 2020-10-19 | 2021-01-15 | 华南理工大学 | Middle-arranged driving device of electric power-assisted bicycle |
| CN215323150U (en) * | 2021-07-16 | 2021-12-28 | 苏州绿的谐波传动科技股份有限公司 | Harmonic transmission device applied to electric power-assisted bicycle and electric power-assisted bicycle |
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2022
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2894047Y (en) * | 2006-03-20 | 2007-04-25 | 上海中广电动车有限公司 | Electric bicycle harmonic reducing speed driving device |
| CN202449162U (en) * | 2011-11-30 | 2012-09-26 | 张源琪 | Harmonic speed reducing driver for electric bicycle |
| CN106936261A (en) * | 2017-04-10 | 2017-07-07 | 南京信息工程大学 | Flexbile gear output harmonic wave all-in-one |
| CN209444758U (en) * | 2018-10-29 | 2019-09-27 | 广东省机械研究所 | A kind of direct-drive type harmonic speed reducer transmission device |
| CN112224327A (en) * | 2020-10-19 | 2021-01-15 | 华南理工大学 | Middle-arranged driving device of electric power-assisted bicycle |
| CN215323150U (en) * | 2021-07-16 | 2021-12-28 | 苏州绿的谐波传动科技股份有限公司 | Harmonic transmission device applied to electric power-assisted bicycle and electric power-assisted bicycle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024066552A1 (en) * | 2022-09-29 | 2024-04-04 | 浙江联宜电机有限公司 | Mid-drive electric motor for electric power-assisted bicycle |
| TWI822580B (en) * | 2023-02-03 | 2023-11-11 | 宏國學校財團法人宏國德霖科技大學 | Downsizing electric bicycle booster |
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| CN114684318B (en) | 2023-09-22 |
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