CN111391961A - Middle shaft transmission device of electric bicycle - Google Patents
Middle shaft transmission device of electric bicycle Download PDFInfo
- Publication number
- CN111391961A CN111391961A CN202010386328.7A CN202010386328A CN111391961A CN 111391961 A CN111391961 A CN 111391961A CN 202010386328 A CN202010386328 A CN 202010386328A CN 111391961 A CN111391961 A CN 111391961A
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- Prior art keywords
- gear
- shaft
- transmission
- electric bicycle
- middle shaft
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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
- B62M6/45—Control or actuating devices therefor
- B62M6/50—Control or actuating devices therefor characterised by detectors or sensors, or arrangement thereof
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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
- B62M6/70—Rider propelled cycles with auxiliary electric motor power-driven at single endless flexible member, e.g. chain, between cycle crankshaft and wheel axle, the motor engaging the endless flexible member
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Transmission Devices (AREA)
Abstract
The invention discloses a middle shaft transmission device of an electric bicycle, wherein a middle shaft is used for mounting a crank and a pedal to bear the riding pedaling force; the main chain wheel transmits pedal force to a driving chain wheel of the electric bicycle through a sleeved chain; the motor core is arranged in the shell together with the middle shaft and is provided with a core shaft which is used for outputting power and is parallel to the middle shaft; the output rotating shaft is connected with a first transmission gear through a first one-way clutch, the gear is meshed with a core gear fixedly or integrally arranged on the core shaft, the output rotating shaft is also connected with a second transmission gear through a second one-way clutch, the gear is in transmission connection with a third transmission gear fixedly arranged on the middle shaft through an idle gear which is pivoted in the shell, and a main toothed disc is fixed on the output rotating shaft. According to the invention, the main fluted disc is fixed on the output rotating shaft by an inverse conventional design, so that the whole structure of the mechanism is more compact, the volume is smaller, and the transmission efficiency is higher.
Description
Technical Field
The invention relates to a middle shaft transmission device of an electric bicycle.
Background
The electric bicycle middle shaft transmission device is a general name of a whole set of power mechanism including a motor, a middle shaft, a clutch, a speed reducing mechanism, a torque sensor and a chain wheel. The structure forms of the middle shaft transmission device in the prior art are various, and the final transmission efficiency and the whole volume of the mechanism are all different due to different structures.
A middle shaft transmission device widely applied in the industry of the electric bicycle at present is in a side hanging mode, a middle shaft of the middle shaft transmission device is arranged in parallel with an output shaft of a motor, a middle shaft sleeve pipe for arranging the middle shaft is led out of a shell so as to be inserted into a frame five-way pipe of a universal specification on the market, and therefore the motor does not need to be matched with a special hanging bracket, can be matched with frames of most specifications on the market and has good adaptability.
As is well known, in the existing inherent structural form of a middle shaft transmission device, a chain wheel is usually fixed with a middle shaft, and power at the motor end is decelerated by a deceleration mechanism, transmitted to the middle shaft by a one-stage or multi-stage transmission gear, transmitted to the chain wheel by the middle shaft, and finally transmitted to a rear wheel to drive an electric bicycle to run by the chain wheel; when the bicycle is ridden, the force of the pedal of a person is transmitted to the middle shaft through the crank, then transmitted to the chain wheel, and finally transmitted to the rear wheel driving electric bicycle through the chain by the chain wheel to run.
However, in practice, the above-described inherent design of the bottom bracket bearing drive increasingly suffers from the following disadvantages:
1) the power output of the motor is transmitted through the speed reducing mechanism and also transmitted to the chain wheel through the middle one-stage or multi-stage gear transmission mechanism, so that the transmission loss is large, and the transmission efficiency cannot be effectively improved all the time;
2) the larger size of the crankset coupled with its geared design with the central shaft and the interior leads to an overall structure that cannot be further compacted, but the crankset cannot be made smaller because it is directly mounted on the central shaft, the specifications being designed according to the transmission ratio and the human pedaling rate, which is not desirable or permissible in design if the crankset is made smaller, which may increase the human pedaling rate.
Therefore, a middle shaft transmission device of an electric bicycle, which has a more compact structure, a smaller volume and higher transmission efficiency, is urgently needed in the industry.
Disclosure of Invention
The invention aims to: the middle shaft transmission device of the electric bicycle is more compact in structure, small in size and high in transmission efficiency.
The technical scheme of the invention is as follows: an electric bicycle bottom bracket bearing drive device, comprising:
the middle shaft is used for mounting a crank and a pedal to bear the riding pedaling force;
the main chain wheel transmits pedal force to a driving chain wheel of the electric bicycle through a sleeved chain;
the motor core is arranged in the shell together with the middle shaft and is provided with a core shaft which is used for outputting power and is parallel to the middle shaft;
the output rotating shaft is connected with a first transmission gear through a first one-way clutch, the first transmission gear is meshed with a core gear fixedly or integrally arranged on the core shaft, the output rotating shaft is connected with a second transmission gear through a second one-way clutch, the second transmission gear is in transmission connection with a third transmission gear fixedly arranged on the middle shaft through an idle gear which is pivoted in the shell, and the main toothed disc is fixed on the output rotating shaft.
Of course, the motor core may adopt any form of an inner rotor outer stator or an outer rotor inner stator, and the invention is not limited to this.
Furthermore, the invention also comprises a torque sensor arranged on the middle shaft, wherein the torque sensor is a known magnetic ring Hall sensor and comprises a deformation shaft sleeve fixed on the middle shaft, and the deformation shaft sleeve is fixedly connected with the inner ring of the third transmission gear through a spline.
Furthermore, the torque sensor further comprises a hall element support which is fixed on the shell and is positioned at the periphery of the deformation shaft sleeve, an induction magnetic ring positioning sleeve is fixed on the deformation shaft sleeve, an induction magnetic ring is fixed on the induction magnetic ring positioning sleeve along the circumference, a hall element matched with the induction magnetic ring is fixed on the hall element support, and the hall element is electrically connected with a controller of the electric bicycle, which is used for driving the motor core to run.
For the installation form of the torque sensor, the invention can also adopt another scheme, namely the torque sensor is arranged at the position of the idler pulley, the torque sensor comprises a sensor deformation bracket arranged in the shell, the idler pulley is pivotally installed on the sensor deformation bracket, simultaneously, a strain gauge and a PCB (printed circuit board) electrically connected with the strain gauge are fixed on the sensor deformation bracket, and the PCB is electrically connected with a controller of the electric bicycle, which is used for driving the motor core to run; and the centers of the second transmission gear, the idle gear and the third transmission gear are distributed in a triangular shape.
Furthermore, the invention also comprises at least one auxiliary chain wheel which is pivoted on the shell and is used for expanding the chain.
Furthermore, the first one-way clutch and the second one-way clutch are both one-way needle bearings.
Furthermore, the diameter of the first transmission gear is larger than that of the movement gear; the diameter of the third transmission gear is larger than that of the idle gear, and the diameter of the idle gear is larger than or equal to that of the second transmission gear.
Furthermore, the output rotating shaft is positioned between the machine core shaft and the middle shaft.
Furthermore, one end of the output rotating shaft extends out of the shell, a step part for the main chain wheel to be sleeved and abutted is milled on the output rotating shaft, meanwhile, an axial threaded hole is formed in the end of the output rotating shaft, the main chain wheel is locked through the cooperation of the same chain wheel screw, and the main chain wheel is very convenient to install and position.
The working principle of the invention is as follows:
when the motor core is in a working state, a person treads the motor core to enable the torque sensor to generate a sensing signal, the motor core is driven to operate, the motor core shaft outputs torque under the meshing action of the first one-way clutch, the torque is transmitted to the main chain wheel through the first transmission gear and the output rotating shaft, and the main chain wheel transmits the torque to the driving chain wheel of the electric bicycle through the chain to drive the electric bicycle to advance. In this state, the second one-way clutch is disengaged, so that the second transmission gear does not transmit torque, and the central shaft is prevented from rotating along with the central shaft.
When a person rides and tramples the working state, the foot continuously tramples the pedal on the crank, the torque is transmitted to the third transmission gear through the middle shaft and then transmitted to the second transmission gear through the idle wheel and the meshed second one-way clutch to drive the output rotating shaft and the main cranks to rotate, and finally the main cranks transmit the torque to the driving chain wheel of the electric bicycle through the chain to drive the electric bicycle to move. In this state, the first one-way clutch is disengaged, so that the first transmission gear cannot transmit torque to the core shaft.
The invention has the advantages that:
1) according to the invention, the main toothed disc is fixed on the output rotating shaft which is driven by the same machine core shaft through the first-stage gear instead of being directly fixed on the middle shaft, so that the power output of the motor machine core does not need to be transmitted to the main toothed disc through the speed reducing mechanism and the middle first-stage or multi-stage gear driving mechanism like the conventional technology, the transmission loss can be greatly reduced, and the transmission efficiency can be effectively improved.
2) In the invention, the main chain wheel is directly fixed on the output rotating shaft instead of the middle shaft, so that the specification of the main chain wheel is not limited by the requirements of transmission speed ratio and treading speed of people, and the size can be further reduced. And after the size of the main gear disc is reduced, the structural design of the whole middle shaft transmission device is more compact, and the volume of the shell part can be reduced.
3) In the conventional technology, a toothed disc connecting sleeve needs to be designed for assembling with a middle shaft and an internal gear transmission mechanism, the main toothed disc is very convenient and simple to mount, the assembling efficiency can be improved, and the toothed disc connecting sleeve is eliminated, so that parts are reduced, the structure is further simplified, and the production cost is reduced.
4) In the mechanism, the torque sensor can be arranged on the middle shaft and can also be arranged at the idler pulley, so that the installation is more flexible and convenient, the internal structure of the middle shaft transmission device can be effectively utilized and optimized, the production efficiency is improved, and the production cost is reduced.
Drawings
The invention is further described with reference to the following figures and examples:
FIG. 1 is a cross-sectional view of a structure according to an embodiment of the present invention;
FIG. 2 is a side view of the outer chain wheel of the housing of the embodiment of FIG. 1 (with the drive sprocket on the rear of the electric bicycle);
fig. 3 is a front view of a torque sensor according to another embodiment of the present invention (including its positional relationship with a first drive gear, a second drive gear, and an idler gear).
Wherein: 1. a middle shaft; 2. a crank; 3. a master chain wheel; 4. a chain; 5. a drive sprocket; 6. a motor core; 6a, a machine core shaft; 7. a housing; 8. an output shaft; 9. a first one-way clutch; 10. a first drive gear; 11. a movement gear; 12. a second one-way clutch; 13. a second transmission gear; 14. an idler pulley; 15. a third transmission gear; 16. a torque sensor; 16a, a deformable sleeve; 17. a sensor deformation support; 18. a strain gauge; 19. a PCB board; 20. an auxiliary chain wheel; 21. a chain wheel screw.
Detailed Description
Example 1: fig. 1 to 2 show an embodiment of the present invention, which is detailed as follows:
the structure of the middle shaft transmission device of the electric bicycle mainly comprises a middle shaft 1, a crank 2, a main toothed disc 3, a motor core 6, a shell 7, an output rotating shaft 8, a first one-way clutch 9, a first transmission gear 10, a core gear 11, a second one-way clutch 12, a second transmission gear 13, an idle gear 14, a third transmission gear 15, a torque sensor 16, an auxiliary toothed disc 20 and a toothed disc screw 12.
First, as shown in fig. 1, the housing 7 is constituted by an upper housing and a lower housing integrally connected to each other, and is integrally fixed to a frame (not shown) of the electric bicycle. The middle shaft is mounted in the lower shell of the shell by a plurality of bearings (not shown) as in the conventional technology, and the two ends of the middle shaft 1 are used for mounting a crank 2 and a pedal (not shown) to bear the riding pedaling force.
The motor core 6, the output rotating shaft 8, the first one-way clutch 9, the first transmission gear 10, the core gear 11, the second one-way clutch 12 and the second transmission gear 13 are all installed in the upper shell of the shell 7, wherein the motor core 6 is in an outer rotor and inner stator mode, the core shaft 6a is fixed to the center of the rotor, and the front end of the core shaft 6a is supported and installed in the shell 7 through a bearing. An output rotating shaft 8 parallel to the machine core shaft 6a is further installed in the upper shell below the machine core shaft 6a through a plurality of bearings (not shown in the figure), a first one-way clutch 9 and a second one-way clutch 12 are sequentially sleeved on the output rotating shaft 8 along the axial direction, and the first one-way clutch 9 and the second one-way clutch 12 are both one-way needle bearings.
As shown in fig. 1 and 2, the first transmission gear 10 is fixed to an outer race of the first one-way clutch 9, and the second transmission gear 13 is fixed to an outer race of the second one-way clutch 12. The first transmission gear 10 is engaged with a movement gear 11 formed on the movement shaft 6a, the second transmission gear 13 is engaged with an idle gear 14 pivotally arranged in the housing 7, and the idle gear 14 is engaged with a third transmission gear 15 fixed on the middle shaft 1. One end of the output rotating shaft 8, which is close to the second one-way clutch 12, extends out of the shell 7 to fix the main chain wheel 3, a step part for the main chain wheel 3 to be sleeved and abutted against is milled on the output rotating shaft, meanwhile, the end is provided with an axial threaded hole, and the same chain wheel screw 21 is matched to lock the main chain wheel 3, which is specifically shown in fig. 1. The main chain wheel 3 transmits a pedaling force to a driving sprocket 5 installed at the rear of the frame of the electric bicycle through a sheathing chain 4, as shown in fig. 2.
Still referring to fig. 2, two auxiliary crankshafts 20 are pivotally mounted symmetrically on the upper and lower sides of the bottom bracket axle 1 on the lower housing of the housing 7 in this embodiment for spreading the chain 4, so as to better transmit torque and avoid the interference of the chain 4 with the crank 2.
As shown in fig. 1, the middle shaft 1 is located below the output rotating shaft 8, in the present invention, a magnetic ring hall type torque sensor 16 is installed on the middle shaft 1, and this torque sensor 16 includes a deformation shaft sleeve 16a fixed on the middle shaft 1, and as the known technology, it also includes the following structures omitted in the figure: the Hall element support is fixed on the shell 7 and positioned at the periphery of the deformation shaft sleeve 16a, an induction magnetic ring positioning sleeve is fixed on the deformation shaft sleeve 16a, an induction magnetic ring is fixed on the induction magnetic ring positioning sleeve along the circumference, a Hall element matched with the induction magnetic ring is fixed on the Hall element support, and the Hall element is electrically connected with a controller of the electric bicycle for driving the motor core to run. One end of the deformation shaft sleeve 16a is fixedly connected with the third transmission gear 15 through a spline.
The diameter of the first transmission gear 10 in the embodiment is larger than that of the movement gear 11; the diameter of the third transmission gear 15 is larger than that of the idle gear 14, and the diameter of the idle gear 14 is larger than or equal to that of the second transmission gear 13.
The working principle of the invention is as follows:
when the motor core is in a working state, a person treads the crank 2 and the pedal to enable the middle shaft 1 to be stressed, the torque sensor 16 generates a sensing signal to drive the motor core 6 to run, the motor core 6a outputs torque by means of the meshing effect of the first one-way clutch 9, the torque is transmitted to the main chain wheel 3 through the first transmission gear 10 and the output rotating shaft 8, and the main chain wheel 3 transmits the torque to the driving chain wheel 5 of the electric bicycle through the chain 4 to drive the electric bicycle to move forward. In this state, the second one-way clutch 12 is disengaged, so that the second transmission gear 12 does not transmit torque, and the follow-up rotation of the middle shaft 1 is prevented.
When a person rides and treads the working state, the foot continuously treads the pedal on the crank 2, the torque is transmitted to the third transmission gear 15 through the middle shaft 1 and then transmitted to the second transmission gear 13 through the idle gear 14 and the meshed second one-way clutch 12 to drive the output rotating shaft 8 and the main chain wheel 3 to rotate, and finally the main chain wheel 3 transmits the torque to the driving chain wheel 5 of the electric bicycle through the chain 4 to drive the electric bicycle to move. In this state, the first one-way clutch 9 is disengaged, so that the first transmission gear 10 cannot transmit torque to the spindle 6 a.
Example 2: the structure of the present embodiment is different from that of embodiment 1 in that a torque sensor is not installed on the middle shaft 1, but is installed at the idle wheel 14, and the torque sensor is specially designed and comprises a sensor deformation bracket 17 fixed in the housing 7, the idle wheel 14 is pivotally installed on the sensor deformation bracket 17, and at the same time, a strain gauge 18 and a PCB 19 electrically connected with the strain gauge 18 are fixed on the sensor deformation bracket 17, and the PCB 19 is electrically connected with a controller of the electric bicycle for driving the motor movement 6 to operate; and the centers of the second transmission gear 13, the idle gear 14 and the third transmission gear 15 are distributed in a triangular shape as shown in fig. 3. Since the torque sensor 16 and its modified sleeve 16a shown in fig. 1 are not installed, the third transmission gear 15 is fixed to the bottom bracket 1 by spline connection in this embodiment.
The rest of the structure of this embodiment is the same as embodiment 1, and can be seen from the structures in fig. 1 and 2.
The working principle of this embodiment is also slightly different due to the variation of the position and structure of the torque sensor:
when the motor core works, a person treads a pedal on the crank 2, the middle shaft 1 is stressed, the idler wheel 14 is also stressed through the third transmission gear 15, the idler wheel 14 is stressed to deform the strain gauge 18 on the sensor deformation support 17 to generate a sensing signal which is transmitted to the controller, the controller drives the motor core 6 to run, the motor core shaft 6a outputs torque through the meshing action of the first one-way clutch 9, the torque is transmitted to the main chain wheel 3 through the first transmission gear 10 and the output rotating shaft 8, and the main chain wheel 3 transmits the torque to the driving chain wheel 5 of the electric bicycle through the chain 4 to drive the electric bicycle to move. In this state, the second one-way clutch 12 is disengaged, so that the second transmission gear 12 does not transmit torque, and the follow-up rotation of the middle shaft 1 is prevented.
When a person rides and tramples on the crank 2, the foot continuously tramples on the crank, the torque is transmitted to the output rotating shaft 8 through the middle shaft 1, the third transmission gear 15, the idle gear 14, the second transmission gear 13 and the meshed second one-way clutch 12, so that the main chain wheel 3 is driven to rotate, and finally, the main chain wheel 3 transmits the torque to the driving chain wheel 5 of the electric bicycle through the chain 4 to drive the electric bicycle to move. In this state, the first one-way clutch 9 is disengaged, so that the first transmission gear 10 cannot transmit torque to the spindle 6 a.
It should be understood that the above-mentioned embodiments are only illustrative of the technical concepts and features of the present invention, and are intended to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All modifications made according to the spirit of the main technical scheme of the invention are covered in the protection scope of the invention.
Claims (9)
1. An electric bicycle bottom bracket bearing drive device, comprising:
the middle shaft (1) is used for mounting a crank (2) and pedals to bear the riding pedaling force;
the main chain wheel (3) transmits pedal force to a driving chain wheel (5) of the electric bicycle through a sleeved chain (4);
the motor core (6) is arranged in the shell (7) together with the middle shaft (1) and is provided with a core shaft (6 a) which is used for outputting power and is parallel to the middle shaft;
the transmission mechanism is characterized by further comprising an output rotating shaft (8) which is installed in the shell (7) through a bearing and is parallel to the core shaft (6 a), the output rotating shaft (8) is connected with a first transmission gear (10) through a first one-way clutch (9), the first transmission gear (10) is meshed with a core gear (11) which is fixedly or integrally arranged on the core shaft (6 a), meanwhile, the output rotating shaft (8) is connected with a second transmission gear (13) through a second one-way clutch (12), the second transmission gear (13) is arranged on an idler gear (14) in the shell (7) through a pivot and is in transmission connection with a third transmission gear (15) which is fixedly arranged on the middle shaft (1), and the main toothed disc (3) is fixed on the output rotating shaft (8).
2. The middle shaft transmission device of the electric bicycle as claimed in claim 1, further comprising a torque sensor (16) mounted on the middle shaft (1), wherein the torque sensor (16) comprises a deformable bushing (16 a) fixed on the middle shaft (1), and the deformable bushing (16 a) is fixed with the inner ring of the third transmission gear (15) through spline connection.
3. The bottom bracket transmission device of claim 2, wherein the torque sensor (16) further comprises a hall element bracket fixed to the housing (7) and located at the periphery of the deformation sleeve (16 a), the deformation sleeve (16 a) is fixed with a positioning sleeve of the induction magnetic ring, the positioning sleeve of the induction magnetic ring is fixed with the induction magnetic ring along the circumference, the hall element bracket is fixed with a hall element matched with the induction magnetic ring, and the hall element is electrically connected with a controller of the electric bicycle for driving the motor core (6) to operate.
4. The middle shaft transmission device of the electric bicycle as claimed in claim 1, further comprising a torque sensor disposed at the idle gear (14), which comprises a sensor deformation bracket (17) disposed in the housing (7), wherein the idle gear (14) is pivotally mounted on the sensor deformation bracket (17), and a strain gauge (18) and a PCB (19) electrically connected to the strain gauge (18) are fixed on the sensor deformation bracket (17), and the PCB (19) is electrically connected to a controller of the electric bicycle for driving the motor core (6) to operate; and the centers of the second transmission gear (13), the idle gear (14) and the third transmission gear (15) are distributed in a triangular shape.
5. The bottom bracket axle transmission for electric bicycles of claim 1, further comprising at least one auxiliary chain wheel (20) pivotally mounted on the housing (7) for spreading the chain (4).
6. The bottom bracket axle transmission of an electric bicycle as defined in claim 1, wherein the first one-way clutch (9) and the second one-way clutch (12) are both one-way needle bearings.
7. The bottom bracket axle transmission of an electric bicycle according to claim 1, wherein the diameter of the first transmission gear (10) is larger than the diameter of the movement gear (11); the diameter of the third transmission gear (15) is larger than that of the idle gear (14), and the diameter of the idle gear (14) is larger than or equal to that of the second transmission gear (13).
8. The bottom bracket transmission of electric bicycle according to claim 1, wherein the output shaft (8) is located between the core shaft (6 a) and the bottom bracket (1).
9. The bottom bracket bearing transmission device for the electric bicycle according to claim 1, wherein one end of the output shaft (8) extends out of the housing (7), and is milled with a step portion for the main chain wheel (3) to be sleeved and abutted against, and the end is provided with an axial threaded hole, and the same chain wheel screw (21) is matched to lock the main chain wheel (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386328.7A CN111391961A (en) | 2020-05-09 | 2020-05-09 | Middle shaft transmission device of electric bicycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010386328.7A CN111391961A (en) | 2020-05-09 | 2020-05-09 | Middle shaft transmission device of electric bicycle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111391961A true CN111391961A (en) | 2020-07-10 |
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ID=71426816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010386328.7A Pending CN111391961A (en) | 2020-05-09 | 2020-05-09 | Middle shaft transmission device of electric bicycle |
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| CN (1) | CN111391961A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115123439A (en) * | 2022-07-18 | 2022-09-30 | 无锡川克智能电机有限公司 | Staggered shaft middle-arranged motor of power-assisted bicycle |
-
2020
- 2020-05-09 CN CN202010386328.7A patent/CN111391961A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115123439A (en) * | 2022-07-18 | 2022-09-30 | 无锡川克智能电机有限公司 | Staggered shaft middle-arranged motor of power-assisted bicycle |
| CN115123439B (en) * | 2022-07-18 | 2024-04-09 | 无锡川克智能电机有限公司 | Staggered shaft middle motor of booster bicycle |
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