CN107842564B - Speed changing and shifting device of speed changer - Google Patents
Speed changing and shifting device of speed changer Download PDFInfo
- Publication number
- CN107842564B CN107842564B CN201710902598.7A CN201710902598A CN107842564B CN 107842564 B CN107842564 B CN 107842564B CN 201710902598 A CN201710902598 A CN 201710902598A CN 107842564 B CN107842564 B CN 107842564B
- Authority
- CN
- China
- Prior art keywords
- gear
- low
- sleeve
- speed
- external
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
- F16D23/02—Arrangements for synchronisation, also for power-operated clutches
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
- F16H61/04—Smoothing ratio shift
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
Abstract
The invention provides a speed changing and shifting device of a speed changer, and belongs to the technical field of speed changers. The gear shifting device solves the problems that in the prior art, the power is interrupted in the gear shifting process, the acceleration performance of a vehicle is reduced, the gear shifting irregularity and impact can not be overcome, and the like. The speed change switching mechanism of the speed changer comprises a low-speed gear and a high-speed gear, wherein an inner meshing sleeve, an outer meshing sleeve and a clutch are arranged between the low-speed gear and the high-speed gear, the inner meshing sleeve and the outer meshing sleeve are connected with the clutch in a meshing manner, the outer meshing sleeve is connected with a shifting fork, when the low-speed gear, the inner meshing sleeve and the outer meshing sleeve are connected, the speed changer is positioned in a low-speed section, when the shifting fork shifts the outer meshing sleeve to be connected with the high-speed gear, the inner meshing sleeve can be pressed back to be connected with the outer meshing sleeve under the influence of speed difference, and the speed changer is converted into the high-speed section to finish speed change.
Description
Technical Field
The invention belongs to the technical field of speed variators, and particularly relates to a speed changing and shifting device for a speed changer.
Background
The manual speed changer and some automatic speed changers used in the existing automobile all adopt synchronizer gear shifting devices, a clutch is needed to cut off a power source and the speed changer in the gear shifting process, the rotation speed of a main driven gear is synchronized through friction of the conical surface of a synchronizing ring, and then a meshing gear sleeve slides into a meshing gear ring to finish gear shifting. Therefore, the driving force is interrupted in the gear shifting process, so that the whole vehicle is in a jerk feel, and uncomfortable feeling is brought to a driver and passengers. In addition, the power interruption in the gear shifting process also can cause the acceleration performance of the vehicle to be reduced, and the economy is affected to a certain extent.
If the synchronizer structure is not used, the jaw clutch is directly used as a gear shifting device, and the gear shifting time is shortened, but the gear shifting irregularity and impact cannot be overcome, so that the practical application cannot be performed.
Disclosure of Invention
The invention aims to provide a speed change gear shifting device for a speed changer, which overcomes the defects of the prior art, has short gear engaging time and high efficiency when realizing low speed gear, and has the advantages of quick and impact-free power interruption in the gear shifting process when changing from low speed to high speed gear, eliminating the defect of interruption of driving force when accelerating the speed change of a vehicle in the accelerating process, improving the comfort, shortening the gear shifting time, eliminating friction loss caused by a synchronizer, improving the efficiency of the speed changer, reducing abrasion when shifting in the structure optimization design and prolonging the service life.
The purpose of the invention is realized in the following way:
A speed change gearshift for derailleur, including low gear and high gear, its characterized in that: the clutch driven disc gear hub and the switching engagement sleeve are arranged between the low-speed gear and the high-speed gear, the switching engagement sleeve is internally and externally provided with an internal switching engagement sleeve and an external switching engagement sleeve, the internal switching engagement sleeve and the external switching engagement sleeve are all in constant meshed connection with the clutch driven disc gear hub, external spline teeth are uniformly distributed on the outer ring surface of the internal switching engagement sleeve, the external spline teeth can be meshed with or separated from tooth-embedded teeth on the side surface of the low-speed gear, and a tooth-disengaging inclined plane is arranged on one side of the front end part of the external spline teeth opposite to the low-speed gear; the external cutting meshing sleeve is also connected with a shifting fork, when the low-speed gear, the internal cutting meshing sleeve and the external cutting meshing sleeve are connected, the transmission is in a low speed gear, when the shifting fork shifts the external cutting meshing sleeve to be connected with the high-speed gear, under the influence of speed difference, the external spline teeth are separated from tooth-inserting teeth on the side face of the low-speed gear due to the action of the tooth-separating inclined plane, so that the internal cutting meshing sleeve can be pressed back to be separated from the low-speed gear, and the transmission is converted into the high-speed gear to finish speed change.
The external spline teeth and the internal spline teeth are in meshed connection with spline tooth grooves on the clutch driven disc hub and can axially slide relatively.
When the transmission is shifted from neutral position to low speed, the shifting fork drives the external cutting meshing sleeve to slide to the low speed gear, and the external cutting meshing sleeve drives the internal cutting meshing sleeve to slide to the low speed gear along an external spline groove on the clutch driven disc gear hub; when the tooth cog on the side surface of the low-speed gear is in meshed connection with the external spline teeth on the internal shift meshing sleeve and the internal spline teeth on the external shift meshing sleeve, the transmission is in a low speed gear.
When the external switching engagement sleeve slides to be connected with the high-speed gear, the external switching engagement sleeve, the internal switching engagement sleeve and the clutch driven disc hub are always in spline engagement connection and rotate together, the internal switching engagement sleeve is separated from the low-speed gear under the effect of a tooth disengaging inclined plane, the internal switching engagement sleeve is pressed back to the middle initial position in the axial direction, and the transmission is switched to the high-speed gear to finish the speed change from the low-speed gear to the high-speed gear.
Wherein the inclined surface of the tooth-removing inclined surface is in a plane shape or a curved surface shape. When the tooth-removal inclined surface is curved, the curved surface is curved with a cross section satisfying y=ax 2 +bx+c (a, b, c is a constant, a=2b/3, a+.0) of the parabolic equation.
The control method for shifting gears by using the speed changing and shifting device for the transmission is characterized in that when the transmission is shifted from neutral position to low speed, a shifting fork drives an external shifting engagement sleeve to slide to a low speed gear, and the external shifting engagement sleeve drives the internal shifting engagement sleeve to slide to the low speed gear along an external spline groove on a clutch driven disc gear hub; when the tooth cog on the side surface of the low-speed gear is in meshed connection with the external spline teeth on the internal shift meshing sleeve and the internal spline teeth on the external shift meshing sleeve, the transmission is in a low speed gear; when the transmission is to be shifted from a low gear to a high gear, the shifting fork shifts the external shifting engagement sleeve to slide towards the high gear, the external shifting engagement sleeve keeps still due to the combined power torque effect between the tooth cog of the low gear and the external spline tooth of the internal shifting engagement sleeve, and when the external shifting engagement sleeve slides to be connected with the high gear, the external shifting engagement sleeve, the internal shifting engagement sleeve and the clutch driven disc hub are always in spline engagement connection and rotate together, at the moment, the internal shifting engagement sleeve is separated from the low gear under the effect of the high-low speed difference between the internal shifting engagement sleeve and the low gear, the internal shifting engagement sleeve is pressed back to the middle initial position in the axial direction under the effect of the tooth disengaging inclined plane, and the transmission is shifted to the high gear, so that the transmission from the low gear to the high gear is completed.
Compared with the prior art, the invention has the following outstanding and beneficial technical effects:
1. The invention has simple structure, greatly reduces the number of parts compared with the parts of the traditional speed changing structure of the synchronizer, and reduces the production cost and the structural complexity. The invention does not need to use nonferrous metal materials such as copper and the like, and can reduce the manufacturing cost.
2. The invention has no precise conical surface of the synchronous tooth ring, simple processing and good manufacturability.
3. In the acceleration speed change process, the power is not interrupted in the speed change gear shift process, the jerk feeling in the vehicle acceleration process is eliminated, and the comfort is improved.
4. The invention shortens the gear shifting time, eliminates friction loss caused by the synchronizer and improves the efficiency of the transmission.
5. The invention also carries out the optimization design on the tooth-removing inclined plane, adopts the curved surface with special parameters to remove the tooth sleeve for homing, reduces the abrasion and prolongs the service life.
Drawings
Fig. 1 is a schematic perspective view of the structure of the present invention.
Fig. 2 is a schematic view of the initial neutral position configuration of the present invention.
Fig. 3 is a schematic neutral initial position of the working process of the invention.
Fig. 4 is a schematic diagram of the operation of the present invention in a low gear to high gear shift process.
Detailed Description
The invention is further described in the following examples with reference to the accompanying drawings: with reference to figures 1-2 of the drawings,
The speed change gear shifting device for the transmission comprises a low-speed gear 1 and a high-speed gear 2, wherein a clutch driven disc gear hub 5 and a switching engagement sleeve are arranged between the low-speed gear 1 and the high-speed gear 2, and the switching engagement sleeve is provided with an inner switching engagement sleeve and an outer switching engagement sleeve 3 and an outer switching engagement sleeve 4; the inner switching engagement sleeve 3 and the outer switching engagement sleeve 4 are both in meshed connection with an outer spline groove on the outer ring surface of the clutch driven disc gear hub 5, the outer switching engagement sleeve 4 is connected with a shifting fork, and when the shifting fork shifts the outer switching engagement sleeve 4 to slide towards the low-speed gear 1, the outer switching engagement sleeve 4 drives the inner switching engagement sleeve 3 to slide towards the low-speed gear 1 along the outer spline groove on the clutch driven disc gear hub 5 together; the inner ring surface of the external cutting engagement sleeve 4 is uniformly provided with inner spline teeth 8, and the outer ring surface of the internal cutting engagement sleeve 3 is uniformly provided with outer spline teeth 6; when the tooth embedded teeth on the low-speed gear 1 are in meshed connection with the internal-cutting meshing sleeve 3 and the external spline teeth 6 and the internal spline teeth 8 on the external-cutting meshing sleeve 4, the transmission is in a low-speed section; when the transmission is to be shifted from a low gear to a high gear, the shifting fork shifts the outer shift engagement sleeve 4 to slide towards the high gear 2, the inner shift engagement sleeve 3 is kept still due to the power torque between the tooth cog of the low gear 1 and the inner shift engagement sleeve 3, when the outer shift engagement sleeve 4 slides to be connected with the high gear 2, that is, spline teeth 8 on the outer shift engagement sleeve 4 are engaged with tooth cog 9 on the high gear 2, the outer shift engagement sleeve 4, the inner shift engagement sleeve 3 and the clutch driven disc hub 5 are always in spline engagement connection and rotate together under the influence of a high-low speed difference (under the drive of the high gear 2, the outer shift engagement sleeve 4 drives the clutch driven disc hub 5 to rotate together at a high speed, and at this time, the rotation speed of the inner shift engagement sleeve 3 is higher than that of the low gear 1), the inner shift engagement sleeve 3 is separated from the low gear 1 under the action of the tooth bevel 7, the inner shift engagement sleeve 3 is axially pushed back to the intermediate position of the clutch driven disc hub 15, and the high shift speed is completed.
The outer ring surface of the internal switching engagement sleeve 3 is uniformly provided with external spline teeth 6, the front end part of the teeth 6 (the end part opposite to the low-speed gear 1) is designed into a single-side inclined surface structure, namely, one side is designed into a right angle, effective power transmission is ensured, the other side is provided with a tooth-disengaging inclined surface 7, and when the internal switching engagement sleeve 3 is reversely driven relative to the low-speed gear 1, the tooth-disengaging inclined surface 7 helps the internal switching engagement sleeve 3 to be smoothly separated from the low-speed gear 1 due to the action of the inclined surface, and the internal switching engagement sleeve 3 automatically falls back to the original position.
The inclined surface shape of the tooth-removing inclined surface 7 is a plane shape or a curved surface shape, preferably a curved surface shape with the cross section meeting a parabolic equation, wherein y=ax 2 +bx+c (a, b, c is a constant, a=2b/3, a is not equal to 0), and the parabolic curved surface shape is more favorable for the external spline tooth to be separated from the tooth cog, the gear separation is more thorough compared with the plane shape, the separation interval distance is longer, the occurrence of end abrasion is reduced, and the separation effect is optimal when the parameter a is equal to two-thirds of b, namely a=2b/3.
The shift process of the present invention is illustrated with reference to schematic illustrations of structures shown in fig. 3-4, with the transmission in a neutral position in fig. 3. In fig. 4, different state diagrams are sequentially shown from top to bottom, wherein the transmission is switched to a state of a low speed section, the rotation direction of each gear meshing sleeve is shown by an arrow in fig. 4, and the length of the arrow indicates the speed. When the gear shift is started, the external cutting engagement sleeve slides to the right side under the driving of the shifting fork. The internal switching engagement sleeve keeps the original engagement state still due to the power torque, when the external switching engagement sleeve continues to move to combine with the high-speed gear, under the condition that the rotating speed of the high-speed gear is larger than that of the low-speed gear, the rotating speed difference is generated between the internal switching engagement sleeve and the low-speed gear, the rotating speed of the internal switching engagement sleeve is larger than that of the low-speed gear, and the internal switching engagement sleeve is pressed back into the clutch hub cavity due to the inclined surface of the engagement tooth part of the internal switching engagement sleeve, so that the speed change process is completed.
The above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention in this way, therefore: all equivalent changes in structure, shape and principle of the invention should be covered in the scope of protection of the invention.
Claims (4)
1. A variable speed gearshift for derailleur, includes low gear and high gear, its characterized in that: the clutch driven disc gear hub and the switching engagement sleeve are arranged between the low-speed gear and the high-speed gear, the switching engagement sleeve is provided with an inner sleeve and an outer sleeve, namely the switching engagement sleeve and the external engagement sleeve, the switching engagement sleeve and the external engagement sleeve are all in meshed connection with the clutch driven disc gear hub all the time, external spline teeth are uniformly distributed on the outer ring surface of the switching engagement sleeve, the external spline teeth can be meshed with or separated from tooth-embedded teeth on the side surface of the low-speed gear, internal spline teeth are uniformly distributed on the inner ring surface of the external switching engagement sleeve, and the external spline teeth and the internal spline teeth are in meshed connection with spline tooth grooves on the clutch driven disc gear hub and can axially slide relatively; one side of the front end part of the external spline teeth, which is opposite to the low-speed gear, is provided with a tooth-removing inclined surface, and the other side of the front end part, which is opposite to the tooth-removing inclined surface, is designed into a right-angle structure; the external gear shifting sleeve is also connected with a shifting fork, when the low-speed gear, the internal gear shifting sleeve and the external gear shifting sleeve are connected, the transmission is in a low speed gear, and when the shifting fork shifts the external gear shifting sleeve to be connected with the high-speed gear, under the influence of speed difference, the external spline teeth are separated from tooth-inserting teeth on the side surface of the low-speed gear due to the action of the tooth-removing inclined surface, so that the internal gear shifting sleeve can be pressed back to be separated from the low-speed gear, and the transmission is converted into the high-speed gear to finish the speed change; wherein, when the transmission is to be switched from a low gear to a high gear, the transmission is specifically: the shifting fork shifts the external switching engagement sleeve to slide towards the high-speed gear, the internal switching engagement sleeve keeps motionless due to the action of combined power torque between the tooth embedded teeth of the low-speed gear and the external spline teeth of the internal switching engagement sleeve, when the external switching engagement sleeve slides to be connected with the high-speed gear, the external switching engagement sleeve, the internal switching engagement sleeve and the clutch driven disc hub are always in spline engagement connection and rotate together, under the influence of a high-low speed difference, the internal switching engagement sleeve is separated from the low-speed gear under the action of a tooth disengaging inclined plane, the internal switching engagement sleeve is pressed back to the middle initial position in the axial direction, and the transmission is switched to a high-speed gear to finish the speed change from the low speed gear to the high-speed gear; wherein the inclined surface of the tooth-removing inclined surface is in a plane shape or a curved surface shape.
2. The speed change shift device for a transmission according to claim 1, wherein: when the tooth-removing inclined surface is in a curved surface shape, the curved surface shape is a curved surface shape with the cross section meeting the parabolic equation of y=ax 2 +bx+c (a, b, c is a constant, a=2b/3, a is not equal to 0).
3. The speed change shift device for a transmission according to claim 1, wherein: when the transmission is shifted from neutral position to low speed, the shifting fork drives the external cutting meshing sleeve to slide to the low speed gear, and the external cutting meshing sleeve drives the internal cutting meshing sleeve to slide to the low speed gear along an external spline groove on the clutch driven disc gear hub; when the tooth cog on the side surface of the low-speed gear is in meshed connection with the external spline teeth on the internal shift meshing sleeve and the internal spline teeth on the external shift meshing sleeve, the transmission is in a low speed gear.
4. A control method for shifting gears by using the gear change shifting device for a transmission according to any one of claims 1 to 2, characterized in that when the transmission is shifted from neutral to low gear, the shifting fork is caused to shift the external engagement sleeve to slide toward the low gear, and the external engagement sleeve drives the internal engagement sleeve to slide toward the low gear together along the external spline groove on the clutch driven disc hub; when the tooth cog on the side surface of the low-speed gear is in meshed connection with the external spline teeth on the internal shift meshing sleeve and the internal spline teeth on the external shift meshing sleeve, the transmission is in a low speed gear; when the transmission is to be shifted from a low gear to a high gear, the shifting fork shifts the external shifting engagement sleeve to slide towards the high gear, the external shifting engagement sleeve keeps still due to the combined power torque effect between the tooth cog of the low gear and the external spline tooth of the internal shifting engagement sleeve, and when the external shifting engagement sleeve slides to be connected with the high gear, the external shifting engagement sleeve, the internal shifting engagement sleeve and the clutch driven disc hub are always in spline engagement connection and rotate together, at the moment, the internal shifting engagement sleeve is separated from the low gear under the effect of the high-low speed difference between the internal shifting engagement sleeve and the low gear, the internal shifting engagement sleeve is pressed back to the middle initial position in the axial direction under the effect of the tooth disengaging inclined plane, and the transmission is shifted to the high gear, so that the transmission from the low gear to the high gear is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710902598.7A CN107842564B (en) | 2017-09-29 | 2017-09-29 | Speed changing and shifting device of speed changer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710902598.7A CN107842564B (en) | 2017-09-29 | 2017-09-29 | Speed changing and shifting device of speed changer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107842564A CN107842564A (en) | 2018-03-27 |
| CN107842564B true CN107842564B (en) | 2024-06-04 |
Family
ID=61662136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710902598.7A Active CN107842564B (en) | 2017-09-29 | 2017-09-29 | Speed changing and shifting device of speed changer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107842564B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP7061660B1 (en) * | 2020-12-23 | 2022-04-28 | 株式会社ユニバンス | Power transmission device |
| EP4257837A4 (en) | 2022-02-23 | 2024-04-17 | Zhejiang Xinke Transmission Technology Co., Ltd | CLUTCH CONTROL MECHANISM |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0914290A (en) * | 1995-06-26 | 1997-01-14 | Hino Motors Ltd | Synchro-mesh device for transmission |
| CN201420848Y (en) * | 2009-06-23 | 2010-03-10 | 林春为 | Oil-sealing type front pneumatic auxiliary gear box assembly |
| KR20140080267A (en) * | 2012-12-20 | 2014-06-30 | 현대위아 주식회사 | A parking device for an electric vehicle |
| KR20140104706A (en) * | 2013-02-21 | 2014-08-29 | 현대다이모스(주) | Manual transmission for vehicle |
| WO2016188614A1 (en) * | 2015-05-23 | 2016-12-01 | Daimler Ag | Group gearbox for a motor vehicle and method for shifting such a group gearbox |
| CN207485906U (en) * | 2017-09-29 | 2018-06-12 | 浙江鑫可精密机械有限公司 | The gear shift device of speed changer |
-
2017
- 2017-09-29 CN CN201710902598.7A patent/CN107842564B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0914290A (en) * | 1995-06-26 | 1997-01-14 | Hino Motors Ltd | Synchro-mesh device for transmission |
| CN201420848Y (en) * | 2009-06-23 | 2010-03-10 | 林春为 | Oil-sealing type front pneumatic auxiliary gear box assembly |
| KR20140080267A (en) * | 2012-12-20 | 2014-06-30 | 현대위아 주식회사 | A parking device for an electric vehicle |
| KR20140104706A (en) * | 2013-02-21 | 2014-08-29 | 현대다이모스(주) | Manual transmission for vehicle |
| WO2016188614A1 (en) * | 2015-05-23 | 2016-12-01 | Daimler Ag | Group gearbox for a motor vehicle and method for shifting such a group gearbox |
| CN207485906U (en) * | 2017-09-29 | 2018-06-12 | 浙江鑫可精密机械有限公司 | The gear shift device of speed changer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107842564A (en) | 2018-03-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9366321B2 (en) | Planetary gear transmission and electric vehicle | |
| CN102840309B (en) | Synchronizer-free shifting system for regulating speed of intermediate shaft of electric automobile | |
| CN101173711B (en) | Gear selection strategy for a dual clutch transmission | |
| KR101543164B1 (en) | Powertrain for hybrid vehicle | |
| JP2013190100A (en) | Automated manual transmission of vehicle | |
| CN107842564B (en) | Speed changing and shifting device of speed changer | |
| JP5553849B2 (en) | Gearbox synchronizer | |
| CN107542917A (en) | A kind of power failure-free gear shift automatic speed changer for machine hybrid drive train | |
| CN207485906U (en) | The gear shift device of speed changer | |
| CN102182801A (en) | Two-gear automatic transmission of planet wheel type electric automobile | |
| JP2016114227A (en) | Vehicular transmission | |
| KR101416377B1 (en) | Power transmission apparatus for vehicle | |
| CN102797803A (en) | Two-speed clutch-free automatic control shifting transmission for electric vehicle | |
| KR20210109064A (en) | Hybrid powertrain for vehicle | |
| KR20200042574A (en) | Power train for vehicle | |
| CN203488645U (en) | Nine-torque-speed-ratio manual-automatic integrated speed changer | |
| CN204226569U (en) | Automobile double clutch automatic gearbox driving mechanism | |
| CN214534424U (en) | Self-lubricating formula derailleur gearshift | |
| CN106884935B (en) | A kind of lightweight DCT drive mechanism | |
| US7845250B2 (en) | Transmission apparatus | |
| CN216842789U (en) | Shuttle type simple synchronizer structure of shifting of tractor | |
| CN202056292U (en) | Automatic gearshift of electric automobile | |
| KR20200091525A (en) | Transmission for electric vehicle | |
| JP6997422B1 (en) | transmission | |
| CN217842567U (en) | Multi-motor multi-gear speed change system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210701 Address after: No.176, Gaoxin East 1st Road, Tongxiang Economic Development Zone, Tongxiang City, Jiaxing City, Zhejiang Province, 314500 Applicant after: Zhejiang Xinke Transmission Technology Co.,Ltd. Address before: No. 150, xitaihe Road, Haimen street, Jiaojiang District, Taizhou City, Zhejiang Province Applicant before: ZHEJIANG SIEKON PRECISION MACHINERY Co.,Ltd. |
|
| TA01 | Transfer of patent application right | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |