CN109253248B - Shifting fork driving mechanism and automatic gear shifting system - Google Patents
Shifting fork driving mechanism and automatic gear shifting system Download PDFInfo
- Publication number
- CN109253248B CN109253248B CN201811213372.7A CN201811213372A CN109253248B CN 109253248 B CN109253248 B CN 109253248B CN 201811213372 A CN201811213372 A CN 201811213372A CN 109253248 B CN109253248 B CN 109253248B
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- Prior art keywords
- shifting fork
- shifting
- shaft
- driving
- gear
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Classifications
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- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/04—Final output mechanisms therefor; Actuating means for the final output mechanisms a single final output mechanism being moved by a single final actuating mechanism
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- 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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/006—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion power being selectively transmitted by either one of the parallel flow paths
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- 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
- F16H3/00—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion
- F16H3/02—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion
- F16H3/08—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts
- F16H3/087—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears
- F16H3/091—Toothed gearings for conveying rotary motion with variable gear ratio or for reversing rotary motion without gears having orbital motion exclusively or essentially with continuously meshing gears, that can be disengaged from their shafts characterised by the disposition of the gears including a single countershaft
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- 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
- F16H57/00—General details of gearing
- F16H57/0018—Shaft assemblies for gearings
- F16H57/0031—Shaft assemblies for gearings with gearing elements rotatable supported on the shaft
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- 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
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
- F16H63/32—Gear shift yokes, e.g. shift forks
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- 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
- F16H2200/00—Transmissions for multiple ratios
- F16H2200/0021—Transmissions for multiple ratios specially adapted for electric vehicles
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gear-Shifting Mechanisms (AREA)
Abstract
The invention discloses a shifting fork driving mechanism which comprises a shifting fork supporting shaft fixedly arranged on a gearbox body, wherein a shifting fork body capable of axially sliding is arranged on the shifting fork supporting shaft, an action end and a driving end of the shifting fork body are respectively positioned on two sides of the shifting fork supporting shaft, the driving end of the shifting fork body is connected with a driving assembly, the driving assembly drives the shifting fork body to axially slide on the shifting fork supporting shaft, and the action end of the shifting fork body is matched with a tooth sleeve of a synchronizer. The beneficial effects of the invention are mainly as follows: the structure is simple and compact, the manufacturing and maintenance cost is low, and the device is suitable for mass production; meanwhile, the performance is reliable and stable, the occurrence of phenomena such as failure of gear shifting performance and the like can be avoided, and the safety of personnel is protected.
Description
Technical Field
The invention relates to the technical field of gearboxes, in particular to a shifting fork driving mechanism and a corresponding automatic gear shifting system.
Background
Due to the current increasing reduction of global energy and the aggravation of environmental pollution, hybrid electric vehicles and even electric vehicles are the focus of attention, and the sales of hybrid electric vehicles have increased from 1.53 ten thousand in 2008 to 20.51 ten thousand in 2012 in recent five years. Therefore, more and more automatic transmission products are being developed, wherein an electronic mechanical automatic transmission (AMT) is favored by many automobile manufacturers because of its economic advantages and lower technical requirements.
Chinese patent No. 106286822a discloses an automatic gear shifting system of an electric vehicle, and in particular, discloses a shift fork driving mechanism, which includes a shift motor, a transmission mechanism, a shift head and a shift fork body. The gear shifting motor drives the transmission mechanism and drives the shifting head to rotate, the shifting head stretches to one side of the shifting fork body, and the rotating motion of the shifting head is converted into axial movement of the shifting fork through the cam surface. In the structure, because the axis of the gear shifting motor is vertical to the axis of the shifting fork body in space, more inconvenience exists when the gearbox gear is arranged; in addition, because the shifting head stretches into in the shifting fork body, driving force is transmitted by the shifting head, and the shifting head has the risk of fracture.
In view of this, another shift fork driving mechanism is disclosed in chinese patent No. 105782431a, which adopts a worm and gear form to convert the rotation of a shift motor into the axial movement of a shift fork body, but the friction loss of tooth surface is large, the efficiency is low, and the installation and debugging are also very inconvenient.
Another MT automatic gear shifting device of chinese patent No. CN206958229U, especially a shift fork driving mechanism, it includes shift motor, shift fork, and the output of every shift motor is fixed firmly the lead screw, the cover is equipped with screw-nut on the lead screw, one side of screw-nut with the fixed connection of shift fork, the fork end of shift fork is used for stirring corresponding synchronous ware ring gear, every be provided with linear displacement sensor on the corresponding position of shift fork, linear displacement sensor is used for monitoring shift position, feedback to the controller. In this patent, one side of screw-nut with the fixed connection of shift fork that shifts, that is to say, the weight of screw-nut one side is greater than the weight of its opposite side far away, when the gear shift motor passes through the screw rod drive screw-nut removes, because the weight of screw rod both sides is different, can produce dynamic unbalance phenomenon, leads to the change of gear position information great, can surpass the threshold value of system design in advance even, and the procedure misjudgement is lost, and the function of shifting is inefficacy, causes life potential safety hazard. In addition, because the weights of the two sides of the screw rod nut are different, under the action of gravity, the screw rod is extremely easy to bend and deform, the smooth performance of the screw rod nut sliding on the screw rod stably is affected, and normal gear shifting is not possible.
Therefore, there is an urgent need for a fork driving mechanism and an automatic gear shifting system thereof.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a shifting fork driving mechanism and an automatic gear shifting system thereof.
The aim of the invention is achieved by the following technical scheme:
the utility model provides a shift fork actuating mechanism, includes the fixed shift fork back shaft that sets up on the gearbox box, but be equipped with an axial slip's shift fork body on the shift fork back shaft, the action end and the drive end of shift fork body are located respectively the both sides of shift fork back shaft, the drive end and the drive assembly of shift fork body are connected, by the drive assembly drive the shift fork body is in axial slip on the shift fork back shaft, be equipped with circular arc type lug on the action end of shift fork body, the lug agrees with mutually with the tooth cover of synchronous ware.
Preferably, the driving assembly comprises a gear shifting motor fixedly arranged on the gearbox body, and a motor shaft of the gear shifting motor is connected with a threaded rod; the gearbox is characterized in that a driving shaft capable of axially sliding is further arranged in the gearbox body, a threaded hole is formed in the top end of the driving shaft, and the threaded end of the threaded rod is inserted into the threaded hole of the driving shaft and is in threaded connection with the threaded hole of the driving shaft.
Preferably, the threaded rod is arranged on the gearbox body through a rotating bearing, an inner clamping ring of the rotating bearing is connected with the threaded rod, and an outer clamping ring of the rotating bearing is fixedly connected with the gearbox body.
Preferably, the two ends of the driving shaft are further sleeved with first sliding sleeves, and outer rings of the first sliding sleeves are fixedly connected with the gearbox body.
Preferably, a radial through hole is formed in the driving shaft, a connecting piece matched with the through hole is arranged in the through hole, and the other end of the connecting piece is fixedly connected to the shifting fork body.
Preferably, the gear shifting motor, the threaded rod and the central axis of the driving shaft are positioned on the same straight line, and the central axis of the shifting fork supporting shaft is parallel to the central axis of the driving shaft.
Preferably, the two ends of the shifting fork supporting shaft are sleeved with a second sliding sleeve in sliding connection with the shifting fork supporting shaft, and the outer ring of the second sliding sleeve is fixedly connected with the shifting fork body.
An automatic gear shifting system comprising a fork drive mechanism as described above; the transmission mechanism also comprises an output shaft parallel to the shifting fork supporting shaft, wherein the output shaft is provided with a driven gear sleeved on the output shaft in a hollow mode and a synchronizer arranged on the output shaft, and the synchronizer can be in transmission connection with the driven gear; the output shaft is also provided with a cylindrical helical gear meshed with a main reduction gear of the differential mechanism positioned at one side of the output shaft.
Preferably, the driven gear is connected with the output shaft through a needle bearing, an inner ring of the connecting bearing is connected with the output shaft, and an outer ring of the connecting bearing is connected with the driven gear.
The beneficial effects of the invention are mainly as follows:
1. the structure is simple, the manufacturing and maintenance cost is low, and the device is suitable for mass production;
2. the system is safe and reliable, the switching process is smooth, and the comfort of the vehicle is greatly improved;
3. the arrangement of the rotating bearing and the first sliding sleeve can unload impact force generated by the shifting fork and the synchronizer gear sleeve in the gear shifting process to the gearbox body, so that the abrasion or damage of the threaded connection part of the threaded rod and the driving shaft is avoided, the gear shifting reliability is ensured, the service life of the gear shifting device is prolonged, the failure of a gear shifting function is prevented, and the safety of personnel is protected;
4. the shifting fork operating mechanism is integrated in the gearbox body, meanwhile, the gear shifting motor shaft and the shifting fork supporting shaft are arranged in parallel, the integration degree is greatly improved, the structure is more compact, and the cost is further reduced.
Drawings
The technical scheme of the invention is further described below with reference to the accompanying drawings:
fig. 1: the structure of the invention is schematically shown;
fig. 2: A-A in FIG. 1;
fig. 3: the perspective view of the present invention is now with the gearbox housing removed.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. The embodiments are not limited to the present invention, and structural, methodological, or functional modifications of the invention from those skilled in the art are included within the scope of the invention.
As shown in fig. 1 to 3, the invention discloses a shifting fork driving mechanism, which comprises a shifting fork supporting shaft 2 fixedly arranged on a gearbox body 1, wherein a shifting fork body 3 capable of axially sliding on the shifting fork supporting shaft 2 is sleeved on the shifting fork supporting shaft 2, precisely, two ends of the shifting fork supporting shaft 2 are sleeved with second sliding sleeves 21 in sliding connection with the shifting fork supporting shaft, and the outer rings of the second sliding sleeves 21 are fixedly connected with the shifting fork body 3. Of course, other connection modes are also possible, and the present invention is not limited to the connection modes, and all fall within the protection scope of the present invention.
In the invention, the action end and the driving end of the shifting fork body 3 are respectively positioned at two sides of the shifting fork supporting shaft 2, the driving end of the shifting fork body 3 is connected with the driving component 4, the driving component 4 drives the shifting fork body 3 to axially move, the action end of the shifting fork body 3 is provided with the arc-shaped protruding block 31, and the protruding block 31 is matched with the tooth sleeve 51 of the synchronizer 5. In the design, the action end and the driving end of the shifting fork body 3 are respectively positioned at the two sides of the shifting fork supporting shaft 2, so that the two sides of the shifting fork supporting shaft are dynamically balanced, the phenomena of misjudgment of a program, failure of a gear shifting function and the like are avoided, and the safety of personnel is protected. Meanwhile, the weight of the two sides of the shifting fork supporting shaft is equivalent, so that the shifting fork supporting shaft can keep permanent perpendicularity. In this embodiment, preferably, the center of gravity of the fork body 3 is located on the central axis of the fork supporting shaft 2.
The specific structure of the driving assembly 4 will be briefly described below, the driving assembly 4 includes a gear-shifting motor 41 fixedly arranged on the gearbox body 1, and a motor shaft of the gear-shifting motor 41 is connected with a threaded rod 42 to transmit torque. The threaded rod 42 is disposed on the gearbox housing 1 through a rotating bearing 44, an inner clamping ring 441 of the rotating bearing 44 is fixedly connected with the threaded rod 42, and an outer clamping ring 442 of the rotating bearing 44 is fixedly connected with the gearbox housing 1. The arrangement of the rotating bearing 44 can avoid abrasion between the threaded rod 42 and the gearbox casing, and prolong the service life of the gearbox casing.
The novel transmission is characterized in that a driving shaft 43 capable of axially sliding is further arranged in the transmission case body 1, first sliding sleeves 45 are sleeved at two ends of the driving shaft 43, an outer ring of each first sliding sleeve 45 is fixedly connected with the transmission case body 1, abrasion between the driving shaft 43 and the transmission case body can be avoided due to the arrangement of the first sliding sleeve 45, and the service life of the novel transmission case is prolonged. The top end of the driving shaft 43 is provided with a threaded hole 431, which is matched with the threaded end 421 of the threaded rod 42, and the threaded end 421 of the threaded rod 42 is inserted into the threaded hole 431 of the driving shaft 43 and is in threaded connection with the threaded hole 431. The central axes of the gear shifting motor 41, the threaded rod 42 and the driving shaft 43 are on the same straight line, and the central axis of the shifting fork supporting shaft 2 is parallel to the central axis of the driving shaft 43.
The driving shaft 43 is provided with a radial through hole 432, a connecting piece 433 matching with the through hole 432 is provided in the through hole 433, and the other end of the connecting piece 433 is fixedly connected to the fork body 3. During shifting, the driving shaft 43 generates a torque around the driving shaft 43 due to the combined action of the motor and the screw thread, which can be overcome by inserting the fork body 3 into the through hole 432. This configuration saves parts that overcome rotational force during shifting of the drive shaft 43.
The invention also discloses an automatic gear shifting system of the shifting fork driving mechanism, which further comprises an output shaft 6 parallel to the shifting fork supporting shaft 2, wherein a driven gear 61 sleeved on the output shaft 6 and the synchronizer 5 arranged on the output shaft are arranged on the output shaft, and the synchronizer 5 can be meshed with the driven gear 61. The output shaft 6 is also provided with a cylindrical helical gear 62 which is meshed with a main reduction gear 71 of the differential 7 positioned at one side thereof. The driven gear 61 is connected to the output shaft 6 through a connecting bearing 63, an inner ring of the connecting bearing 63 is connected to the output shaft 6, and an outer ring of the connecting bearing 63 is connected to the driven gear 61.
According to the invention, the driving shaft and the shifting fork supporting shaft are arranged in parallel, and the driving motor and the driving shaft are coaxially arranged, so that the axial dimension of a product can be greatly reduced. The arrangement of the rotating bearing and the first sliding sleeve can unload impact force generated by the shifting fork and the synchronizer gear sleeve in the gear shifting process to the gearbox body, so that the abrasion or damage of the threaded connection part of the threaded rod and the driving shaft is avoided, the gear shifting reliability is ensured, and the service life of the gear shifting device is prolonged; the shifting fork operating mechanism is integrated in the gearbox body, so that the integration degree is greatly improved, the structure is more compact, and the cost is further reduced.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (5)
1. A shift fork actuating mechanism, characterized in that: comprises a shifting fork supporting shaft (2) fixedly arranged on a gearbox body (1), a shifting fork body (3) is sleeved on the shifting fork supporting shaft (2) in a sliding way, the action end and the driving end of the shifting fork body (3) are respectively positioned at two sides of the axis of the shifting fork supporting shaft (2), the driving end of the shifting fork body (3) is connected with a driving component (4), the driving component (4) drives the shifting fork body (3) to axially slide on the shifting fork supporting shaft (2), an arc-shaped lug (31) is arranged at the action end of the shifting fork body (3), the lug (31) is matched with a toothed sleeve (51) of a synchronizer (5),
the driving assembly (4) comprises a gear shifting motor (41) fixedly arranged on the gearbox body (1), and a motor shaft of the gear shifting motor (41) is connected with a threaded rod (42); a driving shaft (43) capable of axially sliding is further arranged in the gearbox body (1), a threaded hole (431) is formed in the top end of the driving shaft (43), the threaded end (421) of the threaded rod (42) is inserted into the threaded hole (431) of the driving shaft (43) and is in threaded connection with the threaded hole,
the threaded rod (42) is arranged on the gearbox body (1) through a rotating bearing (44), an inner clamping ring (441) of the rotating bearing (44) is connected with the threaded rod (42), an outer clamping ring (442) of the rotating bearing (44) is fixedly connected with the gearbox body (1),
the two ends of the driving shaft (43) are also sleeved with a first sliding sleeve (45), the outer ring of the first sliding sleeve (45) is fixedly connected with the gearbox body (1),
the driving shaft (43) is provided with a through hole (432) which is arranged in the radial direction, a connecting piece (433) which is matched with the through hole (432) is arranged in the through hole, and the other end of the connecting piece (433) is fixedly connected to the shifting fork body (3).
2. A fork drive mechanism according to claim 1, wherein: the gear shifting motor (41), the threaded rod (42) and the central axis of the driving shaft (43) are positioned on the same straight line, and the central axis of the shifting fork supporting shaft (2) is parallel to the central axis of the driving shaft (43).
3. A fork drive mechanism according to claim 1, wherein: the two ends of the shifting fork supporting shaft (2) are sleeved with second sliding sleeves (21) which are in sliding connection with the shifting fork supporting shaft, and the outer rings of the second sliding sleeves (21) are fixedly connected with the shifting fork body (3).
4. An automatic gear shifting system, characterized in that: a fork drive mechanism as claimed in any one of claims 1 to 3; the automatic transmission device further comprises an output shaft (6) parallel to the shifting fork supporting shaft (2), wherein a driven gear (61) sleeved on the output shaft (6) in a hollow mode and the synchronizer (5) arranged on the output shaft are arranged on the output shaft, and the synchronizer (5) can be in transmission connection with the driven gear (61); the output shaft (6) is also provided with a cylindrical helical gear (62) meshed with a main reduction gear (71) of the differential mechanism (7) positioned at one side of the output shaft.
5. The automatic shift system of a fork drive mechanism as set forth in claim 4, wherein: the driven gear (61) is connected with the output shaft (6) through a needle bearing (63), an inner ring of the needle bearing (63) is connected with the output shaft (6), and an outer ring of the needle bearing (63) is connected with the driven gear (61).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811213372.7A CN109253248B (en) | 2018-10-18 | 2018-10-18 | Shifting fork driving mechanism and automatic gear shifting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811213372.7A CN109253248B (en) | 2018-10-18 | 2018-10-18 | Shifting fork driving mechanism and automatic gear shifting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109253248A CN109253248A (en) | 2019-01-22 |
| CN109253248B true CN109253248B (en) | 2023-09-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811213372.7A Active CN109253248B (en) | 2018-10-18 | 2018-10-18 | Shifting fork driving mechanism and automatic gear shifting system |
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| Country | Link |
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| CN (1) | CN109253248B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0481168A1 (en) * | 1990-07-21 | 1992-04-22 | INA Wälzlager Schaeffler KG | Speed changing device |
| CN2725640Y (en) * | 2004-09-17 | 2005-09-14 | 南京理工大学 | Power by poss automatic speed changer gear shifting mechanism for vehicle |
| CN101255903A (en) * | 2007-03-01 | 2008-09-03 | 三菱自动车工业株式会社 | Synchromesh automatic transmission |
| CN204420084U (en) * | 2014-12-23 | 2015-06-24 | 于军 | A kind of motor direct-drive formula gear-shifting actuating mechanism |
| CN105864423A (en) * | 2016-06-14 | 2016-08-17 | 西安交通大学 | Coaxial mechanical automatic gear selecting and shifting system used for automobile and driven by two servo motors |
| CN207621330U (en) * | 2017-09-28 | 2018-07-17 | 山东绿图动力科技股份有限公司 | A kind of ball screw type gearshift for electric vehicle |
| CN108757898A (en) * | 2018-06-06 | 2018-11-06 | 中国第汽车股份有限公司 | A kind of electric drive list gear reducer structure with neutral gear |
| CN209212955U (en) * | 2018-10-18 | 2019-08-06 | 坤泰车辆系统（常州）有限公司 | Shift fork driving mechanism and automatic gear shifting system |
| CN209309296U (en) * | 2018-08-29 | 2019-08-27 | 株洲齿轮有限责任公司 | Speed changer and its gearshift |
-
2018
- 2018-10-18 CN CN201811213372.7A patent/CN109253248B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0481168A1 (en) * | 1990-07-21 | 1992-04-22 | INA Wälzlager Schaeffler KG | Speed changing device |
| CN2725640Y (en) * | 2004-09-17 | 2005-09-14 | 南京理工大学 | Power by poss automatic speed changer gear shifting mechanism for vehicle |
| CN101255903A (en) * | 2007-03-01 | 2008-09-03 | 三菱自动车工业株式会社 | Synchromesh automatic transmission |
| CN204420084U (en) * | 2014-12-23 | 2015-06-24 | 于军 | A kind of motor direct-drive formula gear-shifting actuating mechanism |
| CN105864423A (en) * | 2016-06-14 | 2016-08-17 | 西安交通大学 | Coaxial mechanical automatic gear selecting and shifting system used for automobile and driven by two servo motors |
| CN207621330U (en) * | 2017-09-28 | 2018-07-17 | 山东绿图动力科技股份有限公司 | A kind of ball screw type gearshift for electric vehicle |
| CN108757898A (en) * | 2018-06-06 | 2018-11-06 | 中国第汽车股份有限公司 | A kind of electric drive list gear reducer structure with neutral gear |
| CN209309296U (en) * | 2018-08-29 | 2019-08-27 | 株洲齿轮有限责任公司 | Speed changer and its gearshift |
| CN209212955U (en) * | 2018-10-18 | 2019-08-06 | 坤泰车辆系统（常州）有限公司 | Shift fork driving mechanism and automatic gear shifting system |
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|---|---|
| CN109253248A (en) | 2019-01-22 |
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