Electric gear shift actuator

Abstract

The application discloses an electric gear shifting actuator, and relates to the technical field of gearboxes, which comprises a mechanism carrier, a driving assembly, a first transmission assembly and a second transmission assembly. The first transmission assembly comprises a worm and a worm wheel. The worm and the worm wheel are both rotationally installed on the mechanism carrier and are in mesh with each other. The driving assembly is installed on the mechanism carrier and is connected with the worm, and is used for driving the worm to rotate. The second transmission assembly is installed on the mechanism carrier and is connected with the worm wheel, and is used for converting the rotary motion of the worm wheel into linear motion. The above-mentioned design adopts an electric driving mode to replace a traditional hydraulic driving mode, thereby improving the stability of driving force. Meanwhile, the self-locking property of the worm and the worm wheel is utilized to solve the problem of unstable gear position caused by the shift shaft deviation of a traditional mechanism.

Description

Technical Field

[0001] This application relates to the field of transmission technology, and more particularly to an electric shift actuator. Background Technology

[0002] Most mainstream automatic transmissions currently employ hydraulic electronic shift mechanisms for gear changes. This type of mechanism works by controlling the opening and closing of solenoid valves, in conjunction with corresponding hydraulic control components. Changes in hydraulic oil pressure drive the shift actuators, thus completing the switching between different gears. However, because this shifting method is highly dependent on hydraulic components, it has certain technical limitations in practical applications. When the hydraulic system fails, such as due to hydraulic oil leakage, insufficient pressure, or malfunction of hydraulic control components, the driving force acting on the shift shaft becomes unstable or disappears, making the shift shaft prone to misalignment. This misalignment further leads to inaccurate gear engagement, causing a series of problems such as gear instability, increased shift shock, power transmission interruption, and even inability to shift gears normally, seriously affecting the reliability and safety of the automatic transmission.

[0003] Therefore, there is an urgent need to design a new shifting mechanism to solve the technical problem of unstable gear positions in traditional hydraulic electronic shifting mechanisms. Utility Model Content

[0004] In view of this, the purpose of this application is to provide an electric shift actuator to solve the technical problem of unstable gear position in traditional hydraulic electronic shift mechanisms, and to ensure the reliability and safety of automatic transmissions.

[0005] To achieve the above-mentioned technical objectives, this application provides an electric gear shifting actuator, including a mechanism carrier, a drive assembly, a first transmission assembly, and a second transmission assembly;

[0006] The first transmission assembly includes a worm and a worm wheel;

[0007] Both the worm and the worm wheel are rotatably mounted on the mechanism carrier and mesh with each other;

[0008] The drive assembly is mounted on the mechanism carrier and connected to the worm gear, and is used to drive the worm gear to rotate;

[0009] The second transmission component is mounted on the mechanism carrier and connected to the worm gear, and is used to convert the rotational motion of the worm gear into linear motion.

[0010] Furthermore, the mechanism carrier includes a housing and a cover;

[0011] The top of the housing has a first mounting chamber;

[0012] The bottom of the housing has a second mounting chamber;

[0013] The drive assembly is installed in the first mounting chamber, and its drive end extends into the second mounting chamber;

[0014] The worm and the worm wheel are rotatably mounted in the second mounting chamber;

[0015] The cover is installed at the bottom of the housing.

[0016] Furthermore, the drive assembly includes an actuator motor, an oil seal, and a motor controller;

[0017] The oil seal is installed on the output shaft of the actuator motor;

[0018] The actuator is inverted in the first mounting chamber, and its output shaft extends into the second mounting chamber;

[0019] The motor controller is mounted on top of the actuator motor and is electrically connected to the actuator motor.

[0020] Furthermore, one end of the worm gear is rotatably connected to the cover via a first bearing, and the other end is provided with a keyway into which the output shaft of the actuator motor extends;

[0021] The output shaft of the actuator motor extends into the keyway and is connected to the worm gear in an anti-torsional manner via a connecting key.

[0022] Furthermore, the first transmission assembly also includes a wheel axle;

[0023] One end of the wheel axle is rotatably connected to the housing via a second bearing;

[0024] The worm gear is fitted onto the other end of the axle and is torsionally connected to the axle;

[0025] The second transmission component is connected to the wheel axle.

[0026] Furthermore, the second transmission assembly includes a threaded rod, a sliding member, and a guide member;

[0027] One end of the threaded rod is rotatably connected to the mechanism carrier, and the other end is synchronously rotatably connected to the worm gear;

[0028] The sliding element is fitted onto the threaded rod and is threadedly engaged with the threaded rod;

[0029] The guide member is disposed on the mechanism carrier and is used to restrict the rotation of the sliding member so that it moves along the axial direction of the threaded rod.

[0030] Furthermore, the threaded rod is a ball screw;

[0031] The sliding component is a ball nut that mates with the ball screw.

[0032] Furthermore, the guide component is a guide post;

[0033] The slider is provided with a guide hole through which the guide member moves; or, there are at least two guide members, distributed on one side of the slider and spaced apart, for preventing the slider from rotating.

[0034] Furthermore, a first extension is provided on one side of the housing along the axial direction of the worm gear;

[0035] A second extension extending downward is provided at the bottom of the first extension;

[0036] One end of the threaded rod is rotatably connected to the second extension via a third bearing;

[0037] One end of the guide is fixedly connected to the second extension, and the other end is fixedly connected to the housing.

[0038] Furthermore, the second mounting chamber extends through the housing at both ends of the worm gear in the axial direction;

[0039] A first retaining ring is installed in the second mounting chamber to prevent the second bearing from moving away from the third bearing;

[0040] The mounting hole for mounting the second bearing in the second extension is a through hole;

[0041] A second retaining ring is installed in the mounting hole to prevent the third bearing from moving in the direction away from the second bearing.

[0042] As can be seen from the above technical solutions, the electric gear shifting actuator designed in this application has the following beneficial effects:

[0043] 1. An electric drive system consisting of a drive assembly, worm gear, and a second transmission assembly is adopted to replace the traditional hydraulic drive, avoiding the problem of unstable or lost driving force caused by hydraulic system failure (such as hydraulic oil leakage, insufficient pressure, or hydraulic control component failure), thus improving the stability of the driving force.

[0044] 2. The worm gear and worm shaft have self-locking properties, which can prevent shifting actuators such as shift forks from shifting off-road, ensuring accurate gear engagement and solving the problems of unstable gears, increased shifting impact, power transmission interruption, or even inability to shift gears normally caused by shifting shaft misalignment in traditional mechanisms.

[0045] In summary, the electric shift actuator designed in this application can improve the reliability and safety of automatic transmissions. Attached Figure Description

[0046] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0047] Figure 1 This is a first sectional view of an electric gear shifting actuator provided in this application;

[0048] Figure 2 This is a second sectional view of an electric gear shifting actuator provided in this application;

[0049] Figure 3 This is an exploded view of an electric gear shifting actuator provided in this application;

[0050] In the diagram: 100, Drive assembly; 101, Actuator motor; 102, Motor controller; 103, Oil seal; 200, First transmission assembly; 201, Worm gear; 2011, Keyway; 202, Worm wheel; 203, Axle; 204, Second bearing; 205, First bearing; 206, First snap ring; 207, Connecting key; 300, Second transmission assembly; 301, Threaded rod; 302, Sliding member; 303, Guide member; 304, Third bearing; 305, Second snap ring; 400, Mechanism carrier; 401, Housing; 4011, First mounting chamber; 4012, Second mounting chamber; 4013, First extension; 4014, Second extension; 402, Cover; 403, Second bolt; 404, First bolt; 405, Locating pin. Detailed Implementation

[0051] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the embodiments of this application.

[0052] In the description of the embodiments of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0053] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a replaceable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0054] This application discloses an electric gear shifting actuator.

[0055] Please see Figure 1 One embodiment of an electric gear shifting actuator provided in this application includes:

[0056] The mechanism carrier 400, the drive assembly 100, the first transmission assembly 200, and the second transmission assembly 300.

[0057] The first transmission assembly 200 includes a worm 201 and a worm wheel 202; both the worm 201 and the worm wheel 202 are rotatably mounted on the mechanism carrier 400 and mesh with each other.

[0058] The drive assembly 100 is mounted on the mechanism carrier 400 and connected to the worm gear 201 to drive the worm gear 201 to rotate; the second transmission assembly 300 is mounted on the mechanism carrier 400 and connects the worm wheel 202 to the shift fork or other shift actuator to convert the rotational motion of the worm wheel 202 into the linear motion of the shift fork or other shift actuator.

[0059] The drive assembly 100 generates a control signal based on the vehicle's current driving data, and drives the worm gear 201 to rotate based on the control signal. In turn, the worm gear 201 drives the worm wheel 202 to rotate. The rotation of the worm wheel 202 is converted into linear motion of the shift fork or other shift actuators through the second transmission assembly 300, thereby realizing shift control and controlling the vehicle to switch to the required gear. This allows the electric shift actuator to achieve a more compatible combination with the vehicle's motion state.

[0060] The electric shift actuator designed in this application can be applied to various transmission components such as gearboxes and transfer cases, and has a wide range of applications.

[0061] The electric gear shifting actuator designed in this application has the following beneficial effects:

[0062] 1. An electric drive system consisting of a drive assembly 100, a worm gear 201, a worm wheel 202, and a second transmission assembly 300 is adopted to replace the traditional hydraulic drive, thereby avoiding the problem of unstable or lost driving force caused by hydraulic system failure (such as hydraulic oil leakage, insufficient pressure, or failure of hydraulic control components) and improving the stability of driving force.

[0063] 2. The worm gear 202 and worm 201 have a self-locking mechanism, which can prevent shifting actuators such as shift forks from shifting off-center in non-drive states, ensuring accurate gear engagement. This solves the problems of unstable gears, increased shifting impact, power transmission interruption, or even inability to shift gears normally caused by shifting shaft misalignment in traditional mechanisms.

[0064] In summary, the electric shift actuator designed in this application can improve the reliability and safety of automatic transmissions.

[0065] The above is Embodiment 1 of an electric gear shifting actuator provided in this application. The following is Embodiment 2 of an electric gear shifting actuator provided in this application. Please refer to the following for details. Figures 1 to 3 .

[0066] Based on the solution of Embodiment 1 above:

[0067] Furthermore, such as Figure 2 as well as Figure 3 As shown, the mechanism carrier 400 includes a housing 401 and a cover 402; the top of the housing 401 has a first mounting chamber 4011; the bottom of the housing 401 has a second mounting chamber 4012; the drive assembly 100 is mounted in the first mounting chamber 4011, and its drive end extends into the second mounting chamber 4012; the worm gear 201 and the worm wheel 202 are rotatably mounted in the second mounting chamber 4012; the cover 402 is mounted on the bottom of the housing 401.

[0068] This chamber configuration allows for a more rational installation layout of the various components, contributing to the overall compactness of the electric shift actuator and solving the problem of high space occupancy in traditional hydraulic electronic shift mechanisms.

[0069] The first mounting chamber 4011 provides a stable mounting space for the drive assembly 100, reducing its shaking during operation and ensuring accurate drive. The second mounting chamber 4012 is used to mount the worm gear 201 and worm wheel 202, effectively protecting these two critical transmission components from external interference and extending their service life. The mounting method of the cover 402 facilitates maintenance and repair of the components within the second mounting chamber 4012. When inspection or replacement of the worm gear 201 and worm wheel 202 is required, simply opening the cover 402 is sufficient, improving maintenance convenience.

[0070] The cover 402 can be assembled and fixed together with the housing 401 by a number of first bolts 404 and a number of locating pins 405. The first bolts 404 can be internal hex bolts.

[0071] Furthermore, such as Figure 1 as well as Figure 3 As shown, the design of the drive assembly 100 includes an actuator motor 101, an oil seal 103, and a motor controller 102.

[0072] Oil seal 103 is installed on the output shaft of actuator motor 101, that is, on the shaft end of actuator motor 101 (the output shaft forms the drive end of drive assembly 100). The oil seal 103 effectively prevents oil leakage into the motor, avoiding short circuits or component damage caused by oil corrosion. Furthermore, it prevents dust and debris from entering the motor, ensuring a clean internal environment, thereby extending the service life of actuator motor 101 and reducing the probability of malfunctions.

[0073] The actuator 101 is inverted in the first mounting chamber 4011, and its output shaft extends into the second mounting chamber 4012. The inverted design of the actuator 101 allows its output shaft to extend into the second mounting chamber 4012 at a more reasonable angle and position, and to make effective transmission connection with the worm 201 and worm wheel 202, thereby optimizing the power transmission path and improving transmission efficiency.

[0074] The motor controller 102 is mounted on top of the actuator 101 and electrically connected to the actuator 101. It is used to control the actuator 101 to rotate based on control signals. The motor controller 102 can monitor the working status of the actuator 101 in real time and adjust the control strategy in a timely manner according to actual needs to ensure that the actuator 101 can operate stably and efficiently, thereby ensuring the normal operation of the entire electric shift actuator.

[0075] The motor controller 102 can be assembled and fixed to the top of the housing 401 by a number of second bolts 403, which can be hex bolts.

[0076] Furthermore, such as Figure 2 as well as Figure 3 As shown, one end of the worm gear 201 is rotatably connected to the cover 402 via the first bearing 205, and the other end is provided with a keyway 2011 into which the output shaft of the actuator 101 extends; the output shaft of the actuator 101 extends into the keyway 2011 and is anti-torsional connected to the worm gear 201 via a connecting key 207.

[0077] Specifically, the cover 402 has a bearing mounting groove. The first bearing 205 can be an angular contact ball bearing, which is installed in the bearing mounting groove. Its inner ring mates with one end of the worm 201, and its outer ring mates with the cover 402. The use of angular contact ball bearings can withstand large axial and radial loads, ensuring the stability and reliability of the worm 201 during rotation.

[0078] The connecting key 207 can be a type A flat key, which enables the actuator 101 and the worm gear 201 to be connected in an anti-torsional manner. This connection method is simple and effective, ensuring that the actuator 101 can stably transmit torque to the worm gear 201, so that the worm gear 201 can rotate accurately according to the rotation command of the actuator 101.

[0079] Furthermore, such as Figure 2 as well as Figure 3 As shown, the first transmission assembly 200 also includes a wheel axle 203; one end of the wheel axle 203 is rotatably connected to the housing 401 via a second bearing 204; a worm gear 202 is sleeved on the other end of the wheel axle 203 and is anti-torsional connected to the wheel axle 203; the second transmission assembly 300 is connected to the wheel axle 203.

[0080] Specifically, one end of the outer ring of the wheel axle 203 mates with the inner ring of the second bearing 204, and the outer ring of the second bearing 204 mates with the inner wall of the second mounting chamber 4012; wherein, the second bearing 204 can be a deep groove ball bearing, which has the characteristics of low friction coefficient and high limiting speed, and can ensure the flexibility and stability of the wheel axle 203 during rotation, and reduce energy loss.

[0081] The other end of the outer ring of the axle 203 is connected to the inner ring of the worm gear 202, and the outer ring teeth of the worm gear 202 mesh with the helical teeth of the worm 201.

[0082] The connection between the axle 203 and the second bearing 204, and the anti-torsional connection between the worm gear 202 and the axle 203, ensure the stability and reliability of the first transmission assembly 200 during operation.

[0083] Furthermore, such as Figure 1 as well as Figure 3As shown, the design of the second transmission component 300 includes a threaded rod 301, a sliding member 302, and a guide member 303; one end of the threaded rod 301 is rotatably connected to the mechanism carrier 400, and the other end is synchronously rotatably connected to the worm gear 202; specifically, the other end of the threaded rod 301 is engaged with the inner ring of the wheel axle 203.

[0084] The sliding member 302 is sleeved on the threaded rod 301 and is threadedly engaged with the threaded rod 301; the guide member 303 is disposed on the mechanism carrier 400 and is used to restrict the rotation of the sliding member 302 so that it moves along the axial direction of the threaded rod 301; the sliding member 302 is used to connect the shift fork or other shifting actuators.

[0085] The design of the aforementioned second transmission component 300 ingeniously converts the rotational motion of the worm gear 202 into the linear motion of the sliding member 302, thereby driving the shift fork or other shifting actuators to complete the shifting operation. Specifically, when the worm gear 202 rotates, the threaded rod 301, which is synchronously connected to it, also rotates. Since the sliding member 302 is fitted onto the threaded rod 301 and threadedly engaged with it, and the guide member 303 restricts the rotation of the sliding member 302, the sliding member 302 can only move linearly along the axial direction of the threaded rod 301.

[0086] Furthermore, regarding the fit between the threaded rod 301 and the sliding member 302, when the threaded rod 301 is a ball screw and the sliding member 302 is a ball nut that mates with the ball screw, this fit offers higher transmission efficiency and a lower coefficient of friction. During rotation, the balls roll between the nut and the screw, effectively reducing friction, lowering energy loss, and improving power transmission efficiency compared to ordinary threaded drives. Moreover, the high precision of the fit between the ball screw and the ball nut allows for more accurate conversion of the rotational motion of the worm gear 202 into linear motion, resulting in more precise and smoother gear shifting.

[0087] Furthermore, the guide 303 plays an important role in the second transmission assembly 300. The guide 303 can be a guide post. In order to achieve guiding fit, the sliding member 302 can be provided with a guide hole through which the guide 303 moves, so that the guide post provides precise guidance for the sliding member 302 and ensures that the sliding member 302 moves accurately along the axial direction of the threaded rod 301.

[0088] like Figure 1 as well as Figure 3 As shown, it is also possible to not set the guide hole. In this case, at least two guide members 303 are designed, distributed on one side of the slider 302 and spaced apart, to stop the slider 302 from rotating. This design can also limit the rotation of the slider 302, prevent the slider 302 from deviating or shaking during the movement, and ensure the stability of linear motion.

[0089] Those skilled in the art can make design variations as needed, without limitation.

[0090] Furthermore, such as Figure 1 as well as Figure 3 As shown, in order to facilitate the installation of the threaded rod 301 and to expose the sliding member 302 outside the mechanism carrier 400 for easy connection of shifting actuators such as shift forks, this application has made the following design to the mechanism carrier 400:

[0091] A first extension 4013 is provided on one side of the housing 401 along the axial direction of the worm gear 202, and a second extension 4014 extending downward is provided at the bottom of the first extension 4013. One end of the threaded rod 301 is rotatably connected to the second extension 4014 via a third bearing 304. One end of the guide member 303 is fixedly connected to the second extension 4014, and the other end is fixedly connected to the housing 401. The second extension 4014 and the housing 401 provide space for the sliding member 302 to move, facilitating the connection of the sliding member 302 to shifting actuators such as shift forks, while also providing convenience for the installation of the guide member 303; the guide member 303 can be directly inserted and fixed between the second extension 4014 and the housing 401.

[0092] The third bearing 304 can be a needle roller bearing, providing stable support for the threaded rod 301 and ensuring its stability during rotation. The needle roller bearing has a high radial load capacity, capable of withstanding the large radial force borne by the threaded rod 301 during operation, making the rotation of the threaded rod 301 smoother and more reliable. The outer ring of the third bearing 304 mates with the second extension 4014, and the inner ring of the third bearing 304 mates with the threaded rod 301.

[0093] Furthermore, such as Figure 1 as well as Figure 3 As shown, to improve the convenience of installation and maintenance, the second mounting chamber 4012 of this application adopts a through-hole design at both ends of the worm gear 202 in the axial direction. Under this design, a first retaining ring 206 is installed in the second mounting chamber 4012 to prevent the second bearing 204 from moving away from the third bearing 304. The mounting hole of the second extension 4014 for mounting the second bearing 204 is a through hole, and a second retaining ring 305 is installed in the mounting hole to prevent the third bearing 304 from moving away from the second bearing 204. This retaining ring arrangement can effectively fix the positions of the second bearing 204 and the third bearing 304, preventing them from axially moving during operation, thereby ensuring the stability and reliability of the entire transmission system. When it is necessary to disassemble or replace the second bearing 204 or the third bearing 304, only the corresponding retaining ring needs to be removed, making the operation relatively simple and greatly improving the efficiency of installation and maintenance.

[0094] The above provides a detailed description of an electric gear shifting actuator provided in this application. For those skilled in the art, based on the ideas of the embodiments of this application, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. An electric gear shifting actuator, characterized in that, It includes a mechanism carrier (400), a drive assembly (100), a first transmission assembly (200), and a second transmission assembly (300); The first transmission assembly (200) includes a worm (201) and a worm wheel (202); The worm (201) and the worm wheel (202) are both rotatably mounted on the mechanism carrier (400) and mesh with each other; The drive assembly (100) is mounted on the mechanism carrier (400) and connected to the worm gear (201) for driving the worm gear (201) to rotate; The second transmission component (300) is mounted on the mechanism carrier (400) and connected to the worm gear (202) to convert the rotational motion of the worm gear (202) into linear motion.

2. The electric gear shifting actuator according to claim 1, characterized in that, The mechanism carrier (400) includes a housing (401) and a cover (402); The top of the housing (401) has a first mounting chamber (4011). The bottom of the housing (401) has a second mounting chamber (4012). The drive assembly (100) is installed in the first mounting chamber (4011), and its drive end extends into the second mounting chamber (4012). The worm (201) and the worm wheel (202) are rotatably mounted in the second mounting chamber (4012); The cover (402) is installed at the bottom of the housing (401).

3. The electric gear shifting actuator according to claim 2, characterized in that, The drive assembly (100) includes an actuator motor (101), an oil seal (103), and a motor controller (102). The oil seal (103) is installed on the output shaft of the actuator (101); The actuator (101) is inverted in the first mounting chamber (4011), and its output shaft extends into the second mounting chamber (4012). The motor controller (102) is mounted on top of the actuator (101) and electrically connected to the actuator (101).

4. The electric gear shifting actuator according to claim 3, characterized in that, One end of the worm gear (201) is rotatably connected to the cover (402) via a first bearing (205), and the other end is provided with a keyway (2011) into which the output shaft of the actuator motor (101) extends. The output shaft of the actuator motor (101) extends into the keyway (2011) and is anti-torsionally connected to the worm gear (201) via a connecting key (207).

5. The electric gear shifting actuator according to claim 4, characterized in that, The first transmission assembly (200) also includes a wheel axle (203); One end of the axle (203) is rotatably connected to the housing (401) via a second bearing (204); The worm gear (202) is fitted onto the other end of the axle (203) and is torsionally connected to the axle (203); The second transmission assembly (300) is connected to the axle (203).

6. The electric gear shifting actuator according to claim 5, characterized in that, The second transmission assembly (300) includes a threaded rod (301), a sliding member (302), and a guide member (303); One end of the threaded rod (301) is rotatably connected to the mechanism carrier (400), and the other end is synchronously rotatably connected to the worm gear (202); The sliding member (302) is sleeved on the threaded rod (301) and is threadedly engaged with the threaded rod (301); The guide (303) is disposed on the mechanism carrier (400) to restrict the rotation of the sliding member (302) so that it moves along the axial direction of the threaded rod (301).

7. The electric gear shifting actuator according to claim 6, characterized in that, The threaded rod (301) is a ball screw; The sliding element (302) is a ball nut that mates with the ball screw.

8. The electric gear shifting actuator according to claim 6, characterized in that, The guide component (303) is a guide post; The slider (302) is provided with a guide hole through which the guide (303) moves; or, there are at least two guides (303), distributed on one side of the slider (302) and spaced apart, for stopping the slider (302) from rotating.

9. The electric gear shifting actuator according to claim 6, characterized in that, A first extension (4013) is provided on one side of the housing (401) along the axial direction of the worm gear (202). A second extension (4014) extending downward is provided at the bottom of the first extension (4013). One end of the threaded rod (301) is rotatably connected to the second extension (4014) via a third bearing (304); One end of the guide (303) is fixedly connected to the second extension (4014), and the other end is fixedly connected to the housing (401).

10. The electric gear shifting actuator according to claim 9, characterized in that, The second mounting chamber (4012) penetrates the housing (401) at both ends of the worm gear (202) in the axial direction. A first retaining ring (206) is installed in the second mounting chamber (4012) to stop the second bearing (204) from moving away from the third bearing (304); The mounting hole for mounting the second bearing (204) in the second extension (4014) is a through hole; A second snap ring (305) is installed in the mounting hole to stop the third bearing (304) from moving in the direction away from the second bearing (204).

Images