CN113335444A - Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle - Google Patents
Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle Download PDFInfo
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- CN113335444A CN113335444A CN202110678418.8A CN202110678418A CN113335444A CN 113335444 A CN113335444 A CN 113335444A CN 202110678418 A CN202110678418 A CN 202110678418A CN 113335444 A CN113335444 A CN 113335444A
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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
- B62M11/00—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels
- B62M11/04—Transmissions characterised by the use of interengaging toothed wheels or frictionally-engaging wheels of changeable ratio
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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
- B62M25/00—Actuators for gearing speed-change mechanisms specially adapted for cycles
- B62M25/08—Actuators for gearing speed-change mechanisms specially adapted for cycles with electrical or fluid transmitting systems
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Structure Of Transmissions (AREA)
Abstract
The invention provides an electric two-wheeled motorcycle two-gear speed changing and gear shifting structure with a reverse pushing function, which comprises a motor shaft, an output shaft, a low-speed gear disc gear and a low-speed gear secondary input gear which are coaxially and fixedly connected, wherein the motor shaft is movably sleeved with the low-speed gear input gear and the high-speed gear input gear which is coaxially and fixedly connected, the low-speed gear input gear is meshed with the low-speed gear disc gear, the motor shaft is also connected with a clutch which can be meshed with or separated from the high-speed or low-speed gear input gear, the output shaft is connected with a low-high gear output gear, the low-speed gear output gear is meshed with the low-speed gear secondary input gear, the high-speed gear output gear is meshed, any low-speed gear of the low-speed gear two-stage input gear, the low-speed gear input gear and the low-speed gear output gear is a one-way gear, and any high-speed gear of the high-speed gear input gear and the high-speed gear output gear is a one-way gear. The structure is beneficial to the high-low two-gear quick gear shifting of the electric two-wheeled motorcycle and the realization of the reverse pushing.
Description
Technical Field
The invention relates to the technical field of speed change gear devices, in particular to a two-gear speed change and gear shift structure of an electric two-wheeled motorcycle with a function of backward pushing.
Background
With the development of society and the requirements of environmental protection and travel, electric motorcycles, especially two-wheel electric motorcycles, have increasingly entered people's lives as an economic and environmental-friendly vehicle with the advantages of environmental protection, low price, quick start, low running cost and the like.
The speed of the electric motorcycle needs to be adjusted in the using process, and at present, the speed of the electric motorcycle is changed by changing the rotation of the motor mainly by adjusting the voltage or the current input to the motor. However, the speed of the electric motorcycle is adjusted through voltage or current, when the electric motorcycle is adjusted to a low speed, the motor runs at a low speed, and the output power and the torque of the motor are correspondingly reduced, so that the electric motorcycle cannot ascend when the slope is large due to the fact that the electric motorcycle is powerless in the ascending process, and the use of the electric motorcycle is greatly influenced. Meanwhile, the current of the electric motorcycle is amplified on an upslope, the motor can quickly generate heat, the temperature is increased, the motor and a control system are easy to burn, and the motor is damaged.
At present, an input gear is engaged with a transmission gear in a gearbox, and a first-gear driven gear and a second-gear driven gear are driven to rotate through a first-gear driving gear and a second-gear driving gear which are coaxially connected with the transmission gear, so that the speed of a motor is changed and then transmitted. However, the inventor of the invention finds that the mode has the problems that mechanical transmission is complex during gear shifting, the electric vehicle is not beneficial to fast gear shifting, and the trolley can not be overturned.
Disclosure of Invention
The invention provides a two-gear speed changing and shifting structure of an electric two-wheeled motorcycle, which aims at the technical problems that an input gear is meshed with a transmission gear in the existing speed changing box, and a first-gear driven gear and a second-gear driven gear are driven to rotate through transmission of a first-gear driving gear and a second-gear driving gear which are coaxially connected with the transmission gear, so that the speed of a motor is changed and then transmitted, but mechanical transmission is complex during shifting, the electric two-wheeled motorcycle is not beneficial to quick shifting of an electric vehicle, and a reverse cart cannot be realized.
In order to solve the technical problems, the invention adopts the following technical scheme:
a two-gear speed-changing gear-shifting structure of an electric two-wheeled motorcycle with a reverse pushing function comprises a motor shaft, an output shaft, a low-speed gear plate gear and a low-speed gear secondary input gear which are coaxially and fixedly connected, wherein the motor shaft is movably sleeved with the low-speed gear input gear and is coaxially and fixedly connected with a high-speed gear input gear, the low-speed gear input gear is meshed with the low-speed gear plate gear, the motor shaft is also connected with a clutch which can be meshed with or separated from the high-speed gear input gear or the low-speed gear input gear, and the low-speed gear input gear is positioned between the high-speed gear input gear and the clutch; a low-speed gear output gear and a high-speed gear output gear are fixedly connected to the output shaft, the low-speed gear output gear is meshed with the low-speed gear secondary input gear, and the high-speed gear output gear is meshed with the high-speed gear input gear; any low-speed gear of the low-speed gear plate gear, the low-speed gear secondary input gear, the low-speed gear input gear and the low-speed gear output gear is a one-way gear, and any high-speed gear of the high-speed gear input gear and the high-speed gear output gear is a one-way gear.
Further, the clutch includes that the spline couples the terminal surface on the motor shaft in gear to reach with terminal surface in gear connection is used for stirring terminal surface in gear and the low-speed gear input gear's terminal surface tooth meshing or the divided shift fork.
Further, low gear output gear is low gear output one-way gear, the outer ring tooth of low gear output gear meshes with low gear second grade input gear, high gear output gear is high gear output one-way gear, the outer ring tooth of high gear output gear meshes with high gear input gear, low gear output one-way gear and high gear output one-way gear's unidirectional direction are the syntropy and arrange.
Furthermore, the inner rings of the low-gear output gear and the high-gear output gear are fixedly connected with the outer circumferential surface of the output shaft.
Compared with the prior art, the two-gear speed change gear shift structure of the electric two-wheeled motorcycle with the reverse pushing function is simple, high-low two-gear quick gear shift of the electric two-wheeled motorcycle is facilitated, specifically, when low-speed gear shift is needed to move forward, the end face gear shift gear is shifted through the shifting fork to be meshed with the end face teeth of the low-speed gear input gear, the motor shaft drives the low-speed gear input gear to synchronously rotate anticlockwise through the end face gear shift gear, the low-speed gear input gear drives the coaxially fixedly connected low-speed gear disc gear and the low-speed gear secondary input gear to rotate clockwise, and the low-speed gear secondary input gear drives the output shaft to rotate anticlockwise through the low-speed gear output gear to transmit torque; when a high-speed gear needs to be shifted to move forwards, the shifting fork can shift the end face gear engaging gear and the end face teeth of the low-speed gear input gear to be separated or do no action, the motor shaft drives the high-speed gear input gear to rotate clockwise, and the high-speed gear input gear drives the output shaft to rotate anticlockwise through the high-speed gear output gear to transmit torque; meanwhile, when the cart is reversed, the low-speed gear and the high-speed gear can normally rotate and are not interlocked, so that the cart can be normally reversed by the structural device arranged in the form.
Drawings
Fig. 1 is a schematic view of a two-gear speed-changing and gear-shifting structure of an electric two-wheeled motorcycle with a function of backward pushing provided by the invention.
FIG. 2 is a schematic diagram of a high-speed gear shifting structure provided by the present invention.
Fig. 3 is a schematic structural view of fig. 2 taken along the axial direction of the motor shaft.
In the figure, 1, a motor shaft; 2. an output shaft; 3. a low-speed gear disc gear; 4. a low-speed gear secondary input gear; 5. a low-speed input gear; 6. a high-speed gear input gear; 7. a low-speed output gear; 8. a high-speed output gear; 9. an end face gear is engaged; 10. and (4) shifting a fork.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, the present invention provides a two-gear speed-changing and gear-shifting structure of an electric two-wheeled motorcycle with a function of reverse pushing, which includes a motor shaft 1, an output shaft 2, a coaxially fixed low-speed gear disc gear 3 and a low-speed secondary input gear 4, a low-speed gear input gear 5 is movably sleeved on the motor shaft 1 and a high-speed gear input gear 6 is coaxially and fixedly connected with the motor shaft, namely, the low-gear input gear 5 is sleeved on the motor shaft 1 with a clearance and can freely idle, the high-gear input gear 6 is coaxially and fixedly connected on the motor shaft 1, the low-speed gear input gear 5 is meshed with the low-speed gear plate gear 3, a clutch which can be meshed with or separated from the high-speed gear input gear 6 or the low-speed gear input gear 5 is connected on the motor shaft 1, that is, the clutch may be designed to engage or disengage the high-speed input gear 6, or to engage or disengage the low-speed input gear 5; when the clutch is designed to engage or disengage the low-range input gear 5, the low-range input gear 5 is located between the high-range input gear 6 and the clutch; a low-speed output gear 7 and a high-speed output gear 8 are fixedly connected to the output shaft 2, the low-speed output gear 7 is meshed with the low-speed secondary input gear 4, and the high-speed output gear 8 is meshed with the high-speed input gear 6; any low-speed gear of the low-speed gear disc gear 3, the low-speed gear secondary input gear 4, the low-speed gear input gear 5 and the low-speed gear output gear 7 is a one-way gear, and any high-speed gear of the high-speed gear input gear 6 and the high-speed gear output gear 8 is a one-way gear.
As a specific embodiment, please refer to fig. 1, the clutch includes a face-engaging gear 9 spline-coupled to the motor shaft 1, and a shift fork 10 connected to the face-engaging gear 9 for shifting the face-engaging gear 9 to engage with or disengage from a face tooth of the low-speed input gear 5, i.e. in this embodiment, the clutch is designed to engage with or disengage from the low-speed input gear 5, although those skilled in the art can design the clutch to engage with or disengage from the high-speed input gear 6, and the shift fork 10 can be specifically driven by an existing dc motor. Meanwhile, on the basis of the clutch structure, a person skilled in the art can also adopt other structural modes to realize the clutch structure.
In a preferred embodiment, the low-speed output gear 7 is a low-speed output one-way gear, that is, the low-speed output gear 7 is a one-way gear among four low-speed gears, namely, the low-speed dial gear 3, the low-speed secondary input gear 4, the low-speed input gear 5, and the low-speed output gear 7, so that the low-speed output gear 7 can be called a low-speed output one-way gear, and outer ring teeth of the low-speed output gear 7 are meshed with the low-speed secondary input gear 4; the high-speed output gear 8 is a high-speed output one-way gear, that is, the high-speed output gear 8 is a one-way gear of the two high-speed gears, i.e., the high-speed input gear 6 and the high-speed output gear 8, so that the high-speed output gear 8 can be referred to as a high-speed output one-way gear, the outer ring teeth of the high-speed output gear 8 are meshed with the high-speed input gear 6, and the low-speed output one-way gear and the high-speed output one-way gear are arranged in the same direction in one way.
As a specific embodiment, the inner rings of the low-speed output gear 7 and the high-speed output gear 8 are fixedly connected with the outer circumferential surface of the output shaft 2, thereby fixedly connecting the low-speed output gear 7 and the high-speed output gear 8 with the output shaft 2.
In order to better understand the two-gear speed-changing and gear-shifting structure of the electric two-wheeled motorcycle with the function of reverse pushing provided by the invention, the following will explain the two-gear speed-changing and gear-shifting structure and the working mode of the reverse pushing in detail with reference to the best embodiment:
1. during the low-speed gear, shift fork 10 stirs the terminal surface tooth meshing of terminal surface engaging gear 9 and low-speed gear input gear 5, 1 anticlockwise rotations of motor shaft, 1 terminal surface engaging gear 9 that drives the spline hookup of motor shaft rotates, terminal surface engaging gear 9 drives the synchronous anticlockwise rotation of low-speed gear input gear 5, low-speed gear input gear 5 drives low-speed gear dish gear 3 and 4 clockwise rotations of low-speed gear second grade input gear with 3 coaxial solid hookups of low-speed gear dish gear, low-speed gear second grade input gear 4 drives 7 anticlockwise rotations rather than the engaged low-speed gear output one-way gear, low-speed gear output one-way gear 7 drives output shaft 2 anticlockwise rotation and spreads the moment of torsion, the vehicle is gone forward. At this time, the inner ring of the high-speed gear output one-way gear 8 rotates counterclockwise under the driving of the output shaft 2, the outer ring of the high-speed gear output one-way gear 8 rotates clockwise under the driving of the high-speed gear input gear 6 meshed with the high-speed gear output one-way gear 8, the inner ring and the outer ring of the high-speed gear output one-way gear 8 are in a slipping state, and the high-speed gear does not output torque.
2. In a high-speed gear, the shifting fork 10 can shift the end face gear 9 to be separated from the end face teeth of the low-speed gear input gear 5, or the end face gear 9 and the end face teeth of the low-speed gear input gear 5 are always in a meshed state through the shifting fork 10 without any action; when the vehicle needs the high-speed gear to go ahead, motor shaft 1 drives down clockwise rotation at the motor, and motor shaft 1 drives high-speed gear input gear 6 clockwise rotation, and high-speed gear input gear 6 drives high-speed gear output one-way gear 8 anticlockwise rotation, and high-speed gear output one-way gear 8 drives output shaft 2 anticlockwise rotation and spreads the moment of torsion, and the vehicle goes ahead. At this time, the outer ring teeth of the low-speed output one-way gear 7 are driven by the motor shaft 1 to rotate clockwise sequentially through the low-speed input gear 5, the low-speed dial gear 3 and the low-speed secondary input gear 4, the inner ring of the low-speed output one-way gear 7 is driven by the output shaft 2 to rotate anticlockwise, the inner ring and the outer ring of the low-speed output one-way gear 7 slip, and the low-speed does not output torque.
3. When reversing the shallow, terminal surface engage gear 9 is stirred to shift fork 10, lets terminal surface engage gear 9's terminal surface tooth and low-speed gear input gear 5's terminal surface tooth part, and output shaft 2 clockwise rotation under the reverse push wheel effect:
1) under the drive of the output shaft 2, the inner ring and the outer ring of the high-speed gear output gear 8 (which is set as a high-speed gear output one-way gear) rotate clockwise at the same time, and drive the high-speed gear input gear 6 meshed with the outer ring of the high-speed gear to rotate anticlockwise, and the high-speed gear input gear 6 and the motor shaft 1 are the same part which is coaxially and fixedly connected, so the motor shaft 1 also rotates anticlockwise.
2) Because low-speed gear output gear 7 (establish to low-speed gear output one-way gear) and high-speed gear output gear 8 inner circle output shaft 2 altogether, the unidirectional direction is arranged syntropy again, so the inner circle of low-speed gear output gear 7 also all rotates clockwise with the outer lane tooth, and drive low-speed gear second grade input gear 4 and rather than coaxial solid low-speed gear dish gear 3 anticlockwise rotation that allies oneself with, low-speed gear dish gear 3 drives low-speed gear input gear 5 clockwise rotation rather than the meshing again, because terminal surface gear 9 and low-speed gear input gear 5 terminal surface tooth have separated this moment, so low-speed gear input gear 5 slips the idle running on motor shaft 1. Therefore, when the reverse cart is carried out, the low gear and the high gear can normally rotate and are not interlocked, and the normal reverse cart can be realized by the structural device arranged in the mode.
Compared with the prior art, the two-gear speed change gear shift structure of the electric two-wheeled motorcycle with the reverse pushing function is simple, high-low two-gear quick gear shift of the electric two-wheeled motorcycle is facilitated, specifically, when low-speed gear shift is needed to move forward, the end face gear shift gear is shifted through the shifting fork to be meshed with the end face teeth of the low-speed gear input gear, the motor shaft drives the low-speed gear input gear to synchronously rotate anticlockwise through the end face gear shift gear, the low-speed gear input gear drives the coaxially fixedly connected low-speed gear disc gear and the low-speed gear secondary input gear to rotate clockwise, and the low-speed gear secondary input gear drives the output shaft to rotate anticlockwise through the low-speed gear output gear to transmit torque; when a high-speed gear needs to be shifted to move forwards, the shifting fork can shift the end face gear engaging gear and the end face teeth of the low-speed gear input gear to be separated or do no action, the motor shaft drives the high-speed gear input gear to rotate clockwise, and the high-speed gear input gear drives the output shaft to rotate anticlockwise through the high-speed gear output gear to transmit torque; meanwhile, when the cart is reversed, the low-speed gear and the high-speed gear can normally rotate and are not interlocked, so that the cart can be normally reversed by the structural device arranged in the form.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. The two-gear speed-changing and gear-shifting structure of the electric two-wheeled motorcycle with the reverse pushing function is characterized by comprising a motor shaft (1), an output shaft (2), a low-speed gear disc gear (3) and a low-speed gear secondary input gear (4), wherein the low-speed gear input gear (5) and a high-speed gear input gear (6) are coaxially and fixedly connected to the motor shaft (1) in a sleeved mode, the low-speed gear input gear (5) is meshed with the low-speed gear disc gear (3), the motor shaft (1) is further connected with a clutch which can be meshed with or separated from the high-speed gear input gear (6) or the low-speed gear input gear (5), and the low-speed gear input gear (5) is located between the high-speed gear input gear (6) and the clutch; a low-speed gear output gear (7) and a high-speed gear output gear (8) are fixedly connected to the output shaft (2), the low-speed gear output gear (7) is meshed with the low-speed gear secondary input gear (4), and the high-speed gear output gear (8) is meshed with the high-speed gear input gear (6); any low-speed gear in the low-speed gear disc gear (3), the low-speed gear secondary input gear (4), the low-speed gear input gear (5) and the low-speed gear output gear (7) is a one-way gear, and any high-speed gear in the high-speed gear input gear (6) and the high-speed gear output gear (8) is a one-way gear.
2. The electric motorcycle with a reverse go function two-speed gear shift structure according to claim 1, wherein the clutch includes a face-side engaging gear (9) spline-coupled to the motor shaft (1), and a shift fork (10) connected to the face-side engaging gear (9) for shifting the face-side engaging gear (9) into and out of engagement with a face-side tooth of the low-speed input gear (5).
3. The two-gear speed-changing and gear-shifting structure of the electric two-wheeled motorcycle with the reverse pushing function according to claim 1, wherein the low-speed output gear (7) is a low-speed output one-way gear, the outer ring teeth of the low-speed output gear (7) are meshed with the low-speed secondary input gear (4), the high-speed output gear (8) is a high-speed output one-way gear, the outer ring teeth of the high-speed output gear (8) are meshed with the high-speed input gear (6), and the low-speed output one-way gear and the high-speed output one-way gear are arranged in the same direction in one-way direction.
4. The two-speed gear shift structure of an electric motorcycle with a reverse pushing function as claimed in claim 3, wherein the inner rings of the low-speed output gear (7) and the high-speed output gear (8) are fixedly connected with the outer circumferential surface of the output shaft (2).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110441443.4A CN112874690A (en) | 2021-04-23 | 2021-04-23 | Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle |
| CN2021104414434 | 2021-04-23 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113335444A true CN113335444A (en) | 2021-09-03 |
Family
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Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110441443.4A Withdrawn CN112874690A (en) | 2021-04-23 | 2021-04-23 | Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle |
| CN202110678418.8A Withdrawn CN113335444A (en) | 2021-04-23 | 2021-06-18 | Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110441443.4A Withdrawn CN112874690A (en) | 2021-04-23 | 2021-04-23 | Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle |
Country Status (1)
| Country | Link |
|---|---|
| CN (2) | CN112874690A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112874690A (en) * | 2021-04-23 | 2021-06-01 | 重庆力华自动化技术有限责任公司 | Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH605242A5 (en) * | 1974-06-20 | 1978-09-29 | Steyr Daimler Puch Ag | Two-stage, two-gear motorcycle transmission |
| CH616492A5 (en) * | 1975-09-11 | 1980-03-31 | Fichtel & Sachs Ag | Automatically shifting gear-change box for motor vehicles, in particular for two-wheeled motor vehicles |
| WO2017096629A1 (en) * | 2015-12-11 | 2017-06-15 | 东莞市台铃车业有限公司 | Electrically-driven power unit and electric motorcycle |
| CN208831611U (en) * | 2018-07-18 | 2019-05-07 | 樊朝晖 | A kind of dual input towing gear |
| CN112874690A (en) * | 2021-04-23 | 2021-06-01 | 重庆力华自动化技术有限责任公司 | Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle |
-
2021
- 2021-04-23 CN CN202110441443.4A patent/CN112874690A/en not_active Withdrawn
- 2021-06-18 CN CN202110678418.8A patent/CN113335444A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH605242A5 (en) * | 1974-06-20 | 1978-09-29 | Steyr Daimler Puch Ag | Two-stage, two-gear motorcycle transmission |
| CH616492A5 (en) * | 1975-09-11 | 1980-03-31 | Fichtel & Sachs Ag | Automatically shifting gear-change box for motor vehicles, in particular for two-wheeled motor vehicles |
| WO2017096629A1 (en) * | 2015-12-11 | 2017-06-15 | 东莞市台铃车业有限公司 | Electrically-driven power unit and electric motorcycle |
| CN208831611U (en) * | 2018-07-18 | 2019-05-07 | 樊朝晖 | A kind of dual input towing gear |
| CN112874690A (en) * | 2021-04-23 | 2021-06-01 | 重庆力华自动化技术有限责任公司 | Two-gear speed-changing and gear-shifting structure with reverse pushing function for electric two-wheeled motorcycle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112874690A (en) | 2021-06-01 |
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| PB01 | Publication | ||
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Application publication date: 20210903 |