Gear shifting executing mechanism

Abstract

The utility model relates to a gear shifting executing mechanism. The device comprises a driving motor, the transmission assembly is driven by the driving motor to rotate and comprises a first coupler and a second coupler which are coaxially arranged, the second coupler is connected with a gear shifting driving part, the first coupler comprises first teeth arranged at intervals in the annular direction, and the second coupler comprises second teeth arranged at intervals in the annular direction; the second coupler comprises second teeth which are arranged in the annular direction and extend into the positions between the adjacent first teeth. Gaps are formed between the first teeth and the second teeth in the rotating direction, and elastic pieces are arranged in the gaps. The shifting fork is connected with the gear shifting driving part; when the first coupler rotates, the second coupler can be driven to rotate so as to extrude the elastic piece, and meanwhile the shifting fork is driven by the gear shifting driving part to conduct gear shifting. According to the actuating mechanism, the influence of impact generated in the gear shifting process of an automobile gearbox, an electric drive axle and the like on transmission parts in the actuating mechanism can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile transmission, in particular to a gear shifting actuator. Background Art

[0002] As a key component in the automobile transmission system, the shift actuator drives the transmission to change speed and gear according to the instructions issued by the shift controller. At present, the shift actuator mainly relies on air pressure, hydraulic pressure or traditional mechanical methods to drive the shift fork to achieve the gear shift of the transmission.

[0003] During the existing gear shifting process, due to the inertia of the transmission system and the sudden change of power transmission, a significant impact may be generated. This impact not only affects the smoothness of the gear shifting, but also may damage the transmission parts inside the actuator and shorten its service life. Summary of the invention

[0004] To this end, the utility model provides a shift actuator, which can reduce the impact of the impact generated during the shifting process of the automobile gearbox, electric drive axle, etc. on the internal transmission parts of the actuator.

[0005] In order to solve the above technical problems, the utility model provides a shift actuator, comprising:

[0006] Drive motor;

[0007] A transmission assembly, driven and rotated by the drive motor, the transmission comprising a first coupling and a second coupling arranged coaxially, the second coupling being connected to a shift drive unit, the first coupling comprising first teeth arranged at intervals along the annular direction, the second coupling comprising second teeth arranged along the annular direction and extending between adjacent first teeth, a gap being formed between the first teeth and the second teeth along the rotation direction, and an elastic member being arranged in the gap;

[0008] A shift fork connected to the shift drive unit;

[0009] When the first coupling rotates, the second coupling can be driven to rotate to squeeze the elastic member, and the shift fork is driven to shift gears through the shift driving unit.

[0010] In one embodiment of the utility model, the transmission assembly also includes a transmission component, a driving bevel gear is provided at the output end of the driving motor, the transmission component includes a transmission shaft, a transmission bevel gear sleeved on the transmission shaft and meshing with the driving bevel gear, and the transmission shaft is connected to the first coupling.

[0011] In one embodiment of the utility model, it also includes a gear housing and a planetary gear set, a sun gear and a first bearing respectively arranged in the gear housing, the sun gear is installed on the motor shaft of the drive motor and cooperates with the planetary gear set, and the output end of the planetary gear set is rotatably connected to the gear housing through the first bearing and is connected to the driving bevel gear.

[0012] In one embodiment of the utility model, the first coupling includes a connecting disk, the first teeth arranged at the peripheral end of the connecting disk, and a spline hole arranged in the middle of the connecting disk, and the transmission shaft is provided with a spline extending into the spline hole.

[0013] In an embodiment of the present utility model, a solenoid valve is provided on the axial outer side of the transmission shaft away from the spline end, and the solenoid valve can contact the transmission shaft to limit the rotation of the transmission shaft.

[0014] In an embodiment of the utility model, the shift fork includes a movable shaft and a shift fork body connected to the movable shaft, the movable shaft is equipped with a rack arranged along its length direction, and the shift drive unit includes a driving gear meshing with the rack.

[0015] In one embodiment of the utility model, it also includes a main shell for installing the drive motor and the transmission assembly, a first PCBA board is installed on the drive motor, a magnet is arranged on the movable shaft, a second PCBA board connected to the first PCBA board through a flexible flat cable is arranged on the outer wall of the main shell and located on one side of the magnet, and the second PCBA board is provided with a sensor for detecting the position of the magnet.

[0016] In one embodiment of the present invention, a support frame is further included, the support frame is equipped with a second bearing, and the transmission shaft is rotatably connected to the second bearing.

[0017] In one embodiment of the present utility model, the second coupling comprises a shaft body, the driving gear and the second tooth are respectively arranged at two ends of the shaft body, and the shaft body is sleeved with a third bearing and an oil seal.

[0018] In an embodiment of the present invention, the elastic member includes rubber.

[0019] The above technical solution of the utility model has the following advantages compared with the prior art:

[0020] The utility model discloses a gear shift actuator, which effectively reduces the influence of vibration and reverse impact on the internal transmission parts of the actuator during the gear shift process by arranging an elastic member between the first coupling and the second coupling, and also reduces the possibility of abnormal noise and damage caused by impact.

[0021] The utility model adopts a brake solenoid valve to lock the transmission component, which can effectively lock the transmission parts of the actuator after the gear shift is completed, thereby providing a stable gear retention force for the shift fork and preventing accidental gear shifting or position deviation due to external vibration or other interference.

[0022] The utility model has the characteristics of compact structure and small size, and is suitable for the limited space of the electric drive axle and the gearbox, which not only helps to save the internal space of the vehicle, but also simplifies the layout and integration of the overall system.

[0023] The utility model realizes real-time monitoring and precise control of the gear shifting process by arranging magnets and sensors for detecting the position of the shift fork, thereby ensuring the accuracy of the gear shifting operation and avoiding gear shifting failure or other faults caused by position deviation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0025] Figure 1 It is a structural axial schematic diagram of the shift actuator of the utility model.

[0026] Figure 2 It is a schematic diagram of the main structure of the shift actuator of the utility model.

[0027] Figure 3 It is a side structural schematic diagram of the shift actuator of the utility model.

[0028] Figure 4 It is a schematic diagram of the appearance structure of the shift actuator of the utility model.

[0029] Figure 5 It is a schematic diagram of the matching structure of the first coupling and the second coupling of the utility model.

[0030] Figure 6 It is an exploded schematic diagram of the first coupling and the second coupling of the utility model.

[0031] Description of the Figures in the Specification:

[0032] 1. Driving motor; 11. Driving bevel gear; 12. Planetary gear set; 14. Sun gear; 15. First bearing; 16. First PCBA board;

[0033] 2. Transmission assembly; 21. First coupling; 211. First tooth; 212. Connecting plate; 213. Spline hole; 22. Second coupling; 221. Second tooth; 222. Driving gear; 223. Shaft body; 23. Elastic member; 231. Ring body; 232. Convex body; 233. Arc convex surface; 240. Transmission component; 241. Transmission shaft; 242. Transmission bevel gear; 243. Spline; 24. Support frame; 25. Second bearing; 26. Third bearing; 27. Oil seal; 28. Arc concave surface;

[0034] 3. Shift fork; 31. Movable shaft; 32. Shift fork body; 33. Rack; 34. Magnet;

[0035] 4. Gear housing;

[0036] 5. Solenoid valve;

[0037] 6. Main housing; 61. Second PCBA board. DETAILED DESCRIPTION

[0038] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0039] In the present invention, if directions (up, down, left, right, front and back) are described, it is only for the convenience of describing the technical solution of the present invention, and does not indicate or imply that the technical features referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0040] In the present utility model, "several" means one or more, "multiple" means more than two, "greater than", "less than", "exceed" and the like are understood to exclude the number itself; "above", "below", "within" and the like are understood to include the number itself. In the description of the present utility model, if there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0041] In the present invention, unless otherwise clearly defined, the words "set", "install", "connect" and the like should be understood in a broad sense, for example, they can be directly connected or indirectly connected through an intermediate medium; they can be fixedly connected or detachably connected or integrally formed; they can be mechanically connected or electrically connected or able to communicate with each other; they can be the internal connection of two elements or the interaction relationship between two elements. Those skilled in the art can reasonably determine the specific meanings of the above words in the present invention in combination with the specific content of the technical solution.

[0042] Reference Figure 1 , Figure 2 As shown, a shift actuator of the utility model comprises:

[0043] Driving motor 1;

[0044] The transmission assembly 2 is driven and rotated by the driving motor 1, and the transmission includes a first coupling 21 and a second coupling 22 which are coaxially arranged, the second coupling 22 is connected to a shift driving part, the first coupling 21 includes first teeth 211 which are arranged in an annular direction at intervals, the second coupling 22 includes second teeth 221 which are arranged in an annular direction and extend between adjacent first teeth 211, a gap is formed between the first teeth 211 and the second teeth 221 in the rotation direction, and an elastic member 23 is arranged in the gap;

[0045] A shift fork 3, connected to the shift driving unit;

[0046] When the first coupling 21 rotates, the second coupling 22 can be driven to rotate to squeeze the elastic member 23 , and the shift fork 3 is driven to shift gears through the shift driving unit.

[0047] It can be understood that the rotation of the first coupling 21 can drive the second coupling 22 to rotate synchronously. The setting of the elastic member 23 can not only effectively ensure the transmission of the rotational torque, but also play a buffering role. During the gear shifting process, the vibration of the electric drive bridge or the gearbox may have a reverse impact on the actuator, causing collision inside the actuator and generating abnormal noise. The setting of the elastic member 23 can effectively alleviate this impact and reduce the occurrence of abnormal noise.

[0048] In one embodiment, referring to Figure 1 As shown, the transmission assembly 2 further includes a transmission component 240, the output end of the drive motor 1 is provided with a driving bevel gear 11, the transmission component 240 includes a transmission shaft 241, a transmission bevel gear 242 sleeved on the transmission shaft 241 and meshing with the driving bevel gear 11, and the transmission shaft 241 is connected to the first coupling 21. The radial dimension of the driving bevel gear 11 is smaller than the radial dimension of the transmission bevel gear 242.

[0049] Specifically, refer to Figure 1As shown, it also includes a gear housing 4 and a planetary gear set 12, a sun gear 14 and a first bearing 15 respectively arranged in the gear housing 4. The sun gear 14 is installed on the motor shaft of the drive motor 1 and cooperates with the planetary gear set 12. The planetary gear set 12 is fixed by a cover plate. The output end of the planetary gear set 12 is rotatably connected to the gear housing 4 through the first bearing 15 and is interference fitted with the drive bevel gear 11.

[0050] In one embodiment, referring to Figure 5 As shown, the first coupling 21 includes a connecting disk 212 , the first teeth 211 arranged at the peripheral end of the connecting disk 212 , and a spline hole 213 arranged in the middle of the connecting disk 212 , and the transmission shaft 241 is provided with a spline 243 extending into the spline hole 213 .

[0051] In one embodiment, referring to Figure 1 As shown, a solenoid valve 5 is provided on the axial outer side of one end of the transmission shaft 241 away from the spline 243 , and the solenoid valve 5 can contact the transmission shaft 241 to limit the rotation of the transmission shaft 241 .

[0052] It can be understood that the shaft core of the solenoid valve 5 can be retracted, and a locking disc structure can be installed on the shaft core of the solenoid valve 5. When extended, it will abut against the end of the transmission shaft 241 and brake. Through the action of friction, the transmission shaft 241 is prevented from rotating, providing the corresponding in-gear holding force for the fork 3.

[0053] In one embodiment, referring to Figure 1 As shown, the shift fork 3 includes a movable shaft 31 and a shift fork body 32 connected to the movable shaft 31, the movable shaft 31 is equipped with a rack 33 arranged along its length, and the shift drive unit includes a driving gear 222 meshing with the rack 33. The axis of the movable shaft 31 is perpendicular to the axes of the first coupling 21 and the second coupling 22.

[0054] It can be understood that the shift fork 3 can cooperate with the electric drive axle or the gearbox shift sleeve to shift gears when moving through the movable shaft 31.

[0055] In one embodiment, referring to Figure 2 As shown, it also includes a main housing 6 for mounting the drive motor 1 and the transmission assembly 2, a first PCBA board 16 is mounted on the drive motor 1, a magnet 34 is arranged on the movable shaft 31, and a second PCBA board 61 connected to the first PCBA board 16 via a flexible flat cable is arranged on the outer wall of the main housing 6 on one side of the magnet 34, and the second PCBA board 61 is provided with a sensor for detecting the position of the magnet 34, which can accurately feedback the position of the shift fork 3. A connector for receiving a shift command is arranged on the drive motor 1.

[0056] In one embodiment, a support frame 24 is further included. The support frame 24 is installed with a second bearing 25 , and the transmission shaft 241 is rotatably connected to the second bearing 25 .

[0057] In one embodiment, referring to Figure 5 As shown, the second coupling 22 includes a shaft body 223 , the driving gear 222 and the second gear 221 are respectively disposed at two ends of the shaft body 223 , and the shaft body 223 is sleeved with a third bearing 26 and an oil seal 27 .

[0058] In one embodiment, the elastic member 23 includes rubber or polyurethane elastomer, or a spring may also be used.

[0059] Specifically, refer to Figure 6 As shown, when the elastic member 23 is made of rubber, the elastic member includes an annular body 231 and a convex body 232 radially extending in the circumference of the annular body 231, the annular body 231 is accommodated in an accommodating space formed between a plurality of first teeth 211 and a plurality of second teeth 221, the convex body 232 includes two opposite arcuate convex surfaces 233, and the first teeth 211 and the second teeth 221 both include an arcuate concave surface 28 abutting against the arcuate convex surface 233.

[0060] Working principle: After the control system issues a shift command, it receives the command through the connector, and then the solenoid valve 5 is unlocked. The drive motor 1 starts to drive the planetary gear set 12, and the planetary gear set 12 meshes with the transmission bevel gear 242 through the drive bevel gear 11 connected at one end, thereby driving the large transmission bevel gear 242 to rotate. The transmission bevel gear 242 is connected to the first coupling 21 through the spline 243, so that the first coupling 21 generates a rotational motion. The elastic element between the first coupling 21 and the second coupling 22 provides a buffering effect while transmitting the rotational torque. The rotation of the first coupling 21 drives the second coupling 22 to rotate synchronously, and then drives the rack 33 of the fork 3 through the drive gear 222 of the second coupling 22 to achieve the linear motion of the fork 3. When the sensor on the second plate detects that the magnet on the fork 3 reaches the set position, the drive motor 1 stops running, the solenoid valve 5 is locked again, and the shift process is completed. After the solenoid valve 5 is locked, it can prevent the electric drive axle or the gearbox from driving the fork 3 due to vibration and other factors. Unexpected movement.

[0061] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A gear shift actuator, characterized in that: include: Drive motor (1); A transmission assembly (2) driven and rotated by the drive motor (1), the transmission comprising a first coupling (21) and a second coupling (22) coaxially arranged, the second coupling (22) being connected to a shift drive unit, the first coupling (21) comprising first teeth (211) arranged at intervals along the annular direction, the second coupling (22) comprising second teeth (221) arranged along the annular direction and extending between adjacent first teeth (211), a gap being formed between the first teeth (211) and the second teeth (221) in the rotation direction, and an elastic member (23) being arranged in the gap; A shift fork (3) connected to the gear shift drive unit; When the first coupling (21) rotates, the second coupling (22) can be driven to rotate so as to squeeze the elastic member (23), and at the same time the shift fork (3) is driven to shift gears through the shift drive unit.

2. A gear shift actuator according to claim 1, characterized in that: The transmission assembly (2) further comprises a transmission component (240), the output end of the drive motor (1) being provided with a drive bevel gear (11), the transmission component (240) comprising a transmission shaft (241), and a transmission bevel gear (242) sleeved on the transmission shaft (241) and meshing with the drive bevel gear (11), the transmission shaft (241) being connected to the first coupling (21).

3. A gear shift actuator according to claim 2, characterized in that: It also comprises a gear housing (4), and a planetary gear set (12), a sun gear (14) and a first bearing (15) respectively arranged in the gear housing (4); the sun gear (14) is mounted on the motor shaft of the drive motor (1) and cooperates with the planetary gear set (12); the output end of the planetary gear set (12) is rotatably connected to the gear housing (4) through the first bearing (15) and is connected to the drive bevel gear (11).

4. A gear shift actuator according to claim 2, characterized in that: The first coupling (21) comprises a connecting disk (212), the first teeth (211) arranged at the peripheral end of the connecting disk (212), and a spline hole (213) arranged in the middle of the connecting disk (212), and the transmission shaft (241) is provided with a spline (243) extending into the spline hole (213).

5. A gear shift actuator according to claim 4, characterized in that: An electromagnetic valve (5) is provided axially outside one end of the transmission shaft (241) away from the spline (243); the electromagnetic valve (5) is capable of contacting the transmission shaft (241) to limit the rotation of the transmission shaft (241).

6. The gear shift actuator according to claim 1, characterized in that: The shift fork (3) comprises a movable shaft (31) and a shift fork body (32) connected to the movable shaft (31); the movable shaft (31) is provided with a rack (33) arranged along its length direction; and the gear shift drive unit comprises a drive gear (222) meshing with the rack (33).

7. A gear shift actuator according to claim 6, characterized in that: It also comprises a main housing (6) for mounting the drive motor (1) and the transmission assembly (2); a first PCBA board (16) is mounted on the drive motor (1); a magnet (34) is arranged on the movable shaft (31); a second PCBA board (61) connected to the first PCBA board (16) via a flexible flat cable is arranged on the outer wall of the main housing (6) on one side of the magnet (34); and the second PCBA board (61) is provided with a sensor for detecting the position of the magnet (34).

8. The gear shift actuator according to claim 4, characterized in that: It also comprises a support frame (24), the support frame (24) being mounted with a second bearing (25), and the transmission shaft (241) being rotatably connected to the second bearing (25).

9. The gear shift actuator according to claim 6, characterized in that: The second coupling (22) comprises a shaft body (223), the driving gear (222) and the second tooth (221) being respectively arranged at two ends of the shaft body (223), and the shaft body (223) being sleeved with a third bearing (26) and an oil seal (27).

10. The gear shift actuator according to claim 1, characterized in that: The elastic member (23) comprises rubber.

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