A driver

Abstract

This invention discloses a driver, which includes a base, a motor with an output shaft, a first worm gear driven by the output shaft, a first worm wheel rotatably mounted on the base and meshing with the first worm gear, a transmission shaft connected to the first worm wheel, a sliding shaft, a clutch gear, and an output gear meshing with the clutch gear. The sliding shaft has a socket, and one end of the transmission shaft slides within the socket and rotates synchronously with the sliding shaft. The sliding shaft has a first engagement portion, and the clutch gear has a second engagement portion. When the sliding shaft is in the self-locking position, the first engagement portion and the second engagement portion engage with each other. When the sliding shaft is in the unlocked position, the first engagement portion of the sliding shaft disengages from the second engagement portion of the clutch gear. This invention not only achieves normal transmission when the motor is energized and self-locking when power is off, but also allows for the release of the self-locking function in case of a fault. After the fault is cleared, it can be switched back to the self-locking state, belonging to the technical field of automotive parts.

Description

Technical Field

[0001] This invention relates to the technical field of automotive parts, and in particular to a drive. Background Technology

[0002] With the increasing popularity of automobiles, vehicle performance has become a key consideration for consumers, with intelligence and safety being particularly important. Currently, to enhance intelligence, automobiles generally use electric motors to drive reduction gear sets to automatically open and close doors and the passenger compartment. There are roughly two types of motors used in cars: The first type is a self-locking motor. This type uses a worm gear transmission, where the helix angle of the worm is smaller than the friction angle between the worm gear and the wheel. When the motor is energized, it can rotate. Because the helix angle is smaller than the friction angle, it self-locks when power is off, preventing the motor from rotating, and consequently, the output gears also cannot rotate. However, a self-locking motor cannot unlock in case of a malfunction, preventing doors and the passenger compartment from opening, posing a safety hazard. The second type is a motor without a self-locking function. This type can rotate both when energized and when power is off, but it cannot be used in environments requiring self-locking or anti-theft features. Summary of the Invention

[0003] To address the technical problems existing in the prior art, the objective of this invention is to provide a driver that enables normal transmission of the motor when it is energized, self-locking when the power is off, and the ability to release the self-locking function in case of a fault. Once the fault is resolved, the driver can be switched back to the self-locking state.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A drive includes a base, a motor having an output shaft, a first worm gear drivenly connected to the output shaft, a first worm wheel rotatably mounted on the base and meshing with the first worm gear, a drive shaft connected to the first worm wheel, a sliding shaft, a clutch gear, and an output gear meshing with the clutch gear; the helix angle of the first worm gear is smaller than the friction angle of the contact surface between the first worm wheel and the first worm gear.

[0006] The sliding shaft has an insertion hole, one end of the transmission shaft is slidably disposed in the insertion hole and rotates synchronously with the sliding shaft, the sliding shaft has a first engagement part, and the clutch gear has a second engagement part;

[0007] The sliding shaft switches between a self-locking position and an unlocking position; when the sliding shaft is in the self-locking position, the first engagement part and the second engagement part engage with each other; when the sliding shaft is in the unlocking position, the first engagement part and the second engagement part disengage.

[0008] Furthermore, the driver also includes a drive component for driving the sliding shaft to switch between the self-locking position and the unlocking position.

[0009] Furthermore, the drive assembly includes a first limiting plate disposed on the sliding shaft, a second limiting plate fixed on the base, a spring clamping between the first limiting plate and the second limiting plate and for applying elastic force to the first limiting plate to make the first biting part and the second biting part bite each other, and a drive block for driving the sliding shaft to slide so that the first biting part and the second biting part separate; the spring is sleeved on the sliding shaft and the transmission shaft.

[0010] Furthermore, the drive block is pivotally connected to the base via a pivot, the rotation axis of the drive block is parallel to the sliding direction of the sliding shaft, and a sliding groove is provided on the drive block. The sliding groove has an abutting inner wall for guiding the sliding shaft to slide along the axial direction of the spring so that the first engagement part and the second engagement part are separated. The abutting inner wall abuts against the sliding shaft.

[0011] Furthermore, the base is provided with a guide bar; the guide bar is arc-shaped, and the center of the guide bar coincides with the rotation center of the drive block. The drive block is also provided with an arc-shaped guide groove that matches the guide bar, and the guide bar slides in the arc-shaped guide groove.

[0012] Furthermore, the driver also includes a second worm gear connected to and rotating synchronously with the output shaft, and a second worm wheel connected to and rotating coaxially with the first worm gear; the second worm wheel meshes with the second worm gear.

[0013] Furthermore, the base includes a housing and a cover disposed on the housing; the cover and the housing together enclose a cavity; the housing has a first axial hole communicating with the cavity, and the cover has a second axial hole communicating with the cavity;

[0014] The first worm, the first worm wheel, the output gear, the clutch gear, and the transmission shaft are respectively installed in the cavity. The output shaft passes through the first shaft hole and is connected to the first worm for transmission. One end of the sliding shaft is located outside the cavity, and the other end of the sliding shaft passes through the second shaft hole and is provided with the insertion hole.

[0015] Furthermore, the insertion hole is prismatic, and one end of the drive shaft is provided with a prismatic shape that matches the insertion hole.

[0016] Furthermore, the first engagement part is a bevel gear fixed on the sliding shaft, the bevel gear has external teeth, and the diameter of the bevel gear gradually increases along the direction away from the transmission shaft; the clutch gear has a through hole, the axis of the through hole coincides with the axis of the clutch gear, and the second engagement part is an internal tooth provided on the inner wall of the through hole and matching the external teeth.

[0017] Furthermore, the motor includes a housing, a rotor winding having the output shaft and mounted within the housing, a magnet mounted within the housing, and a Hall plate mounted on the housing.

[0018] Compared with existing technologies, the advantages of this invention are as follows: When the motor of the driver is energized, it can drive the output gear to rotate normally through the transmission of the first worm gear and the first worm. In the event of a power failure, because the helix angle of the first worm is smaller than the friction angle of the contact surface between the first worm gear and the first worm, self-locking is achieved. In the event of a malfunction, by switching the sliding shaft to the unlocked position, the output gear can rotate, thus disengaging the self-locking function and facilitating manual operation of the vehicle's functions. Once the malfunction is resolved, it can be switched back to the self-locking state for normal motor control, thereby improving the safety of vehicle use. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the driver's structure;

[0020] Figure 2 This is a schematic diagram of the driver's structure, omitting the base cover.

[0021] Figure 3 This is a connection diagram of the motor, the first worm, the first worm wheel, the transmission shaft, the sliding shaft, the clutch gear, the output gear, the second worm, and the second worm wheel;

[0022] Figure 4 This is a schematic diagram showing the connection of the first worm, the first worm wheel, the drive shaft, the sliding shaft, the clutch gear, the output gear, the second worm, and the second worm wheel.

[0023] Figure 5 This is a schematic diagram showing the connection of the first worm, the first worm wheel, the drive shaft, the sliding shaft, the clutch gear, the second worm, and the second worm wheel.

[0024] Figure 6 This is a schematic diagram showing the connection of the drive shaft, sliding shaft, and clutch gear;

[0025] Figure 7 yes Figure 6 Exploded view;

[0026] Figure 8This is a schematic diagram of the drive block.

[0027] In the diagram, 1. Base; 2. Motor; 3. First worm gear; 4. First worm wheel; 5. Drive shaft; 6. Sliding shaft; 7. Clutch gear; 8. Output gear; 9. Drive assembly; 10. Second worm gear; 11. Second worm wheel; 12. Locking block; 13. Locking slot;

[0028] 101. Shell; 102. Cover; 103. Guide bar; 501. Prism; 601. First engagement part; 602. Insertion hole; 701. Second engagement part; 901. First limiting plate; 902. Second limiting plate; 903. Spring; 904. Drive block; 905. Pivot; 906. Slide groove; 907. Abutting inner wall; 908. Arc guide groove. Detailed Implementation

[0029] The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and are not intended to limit the scope of the invention.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," 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 this invention 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 this invention.

[0031] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "communication" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable 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 communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0032] In the description of the invention, it should be understood that the terms "first," "second," etc., are used to describe various types of information, but this information should not be limited to these terms. These terms are only used to distinguish information of the same type from one another. For example, without departing from the scope of the invention, "first" information can also be referred to as "second" information, and similarly, "second" information can also be referred to as "first" information.

[0033] like Figures 1 to 4 As shown, this embodiment provides a driver, including a base 1, a motor 2 with an output shaft, a first worm 3 drivenly connected to the output shaft, a first worm wheel 4 rotatably mounted on the base 1 and meshing with the first worm 3, a transmission shaft 5 connected to and rotating synchronously with the first worm wheel 4, a sliding shaft 6, a clutch gear 7, and an output gear 8 meshing with the clutch gear 7. The motor 2 drives the first worm 3 to rotate, the first worm 3 drives the first worm wheel 4 to rotate, the first worm wheel 4 drives the transmission shaft 5 to rotate, the transmission shaft 5 drives the clutch gear 7 to rotate via the sliding shaft 6, and the clutch gear 7 drives the output gear 8 to rotate. The helix angle of the first worm 3 is smaller than the friction angle of the contact surface between the first worm wheel 4 and the first worm 3; therefore, only the first worm 3 can drive the first worm wheel 4 to rotate, while the first worm wheel 4 cannot drive the first worm 3 to rotate. When motor 2 is powered on, the output shaft of motor 2 can indirectly drive the output gear 8 to rotate. However, the output gear 8 cannot drive the output shaft of motor 2 to rotate in the opposite direction. Therefore, when motor 2 is powered off, the output gear 8, the first worm gear 4, the first worm 3, the clutch gear 7, etc., cannot rotate, thus achieving self-locking of the driver.

[0034] The sliding shaft 6 has a socket 602. One end of the transmission shaft 5 is slidably installed in the socket 602 and rotates synchronously with the sliding shaft 6. The sliding shaft 6 is connected to the transmission shaft 5 through the socket 602. The sliding shaft 6 can slide along the rotation axis of the transmission shaft 5 but cannot rotate relative to it. The transmission shaft 5 rotates synchronously and coaxially with the first worm gear 4 under the drive of the first worm gear 4. When the transmission shaft 5 rotates, it drives the sliding shaft 6 to rotate synchronously and coaxially.

[0035] The sliding shaft 6 has a first engaging portion 601, and the clutch gear 7 has a second engaging portion 701 for engaging with the first engaging portion 601. When the first engaging portion 601 of the sliding shaft 6 and the second engaging portion 701 of the clutch gear 7 are engaged, the sliding shaft 6 drives the clutch gear 7 to rotate synchronously and coaxially. When the first engaging portion 601 of the sliding shaft 6 and the second engaging portion 701 of the clutch gear 7 are disengaged, the connection between the sliding shaft 6 and the clutch gear 7 is broken, the sliding shaft 6 rotates freely, and the sliding shaft 6 cannot drive the clutch gear 7 to rotate. Conversely, the rotation of the clutch gear 7 cannot drive the sliding shaft 6 to rotate.

[0036] The sliding shaft 6 is switched between a self-locking position and an unlocking position by sliding along the rotation axis of the transmission shaft 5. When the sliding shaft 6 is in the self-locking position, the first engagement part 601 of the sliding shaft 6 engages with the second engagement part 701 of the clutch gear 7, so that the sliding shaft 6 and the clutch gear 7 rotate synchronously. When the sliding shaft 6 is in the unlocking position, the first engagement part 601 of the sliding shaft 6 disengages from the second engagement part 701 of the clutch gear 7. In normal working condition, the sliding shaft 6 is in the self-locking position. When the motor 2 is powered on, the output shaft of the motor 2 can indirectly drive the output gear 8 to rotate. When the motor 2 is powered off, self-locking is achieved because the helix angle of the first worm 3 is smaller than the friction angle of the contact surface between the first worm wheel 4 and the first worm 3. When motor 2 malfunctions and the output end of output gear 8 needs to be manually driven, the sliding shaft 6 is moved to the unlocked position by driving the sliding shaft 6 to slide. At this time, the first engagement part 601 of the sliding shaft 6 is separated from the second engagement part 701 of the clutch gear 7. The rotation of clutch gear 7 will not be transmitted to the first worm gear 4 through the sliding shaft 6 and the transmission shaft 5. The self-locking of the first worm gear 4 and the first worm 3 will not affect the rotation of clutch gear 7 and output gear 8. Therefore, clutch gear 7 and output gear 8 can rotate, thus unlocking.

[0037] Specifically, in one embodiment, the insertion hole 602 can also be provided on the drive shaft 5, and one end of the sliding shaft 6 is inserted into the insertion hole 602.

[0038] Specifically, in one embodiment, the driver further includes a drive assembly 9 for switching the sliding shaft 6 between a self-locking position and an unlocked position. The drive assembly 9 can drive the sliding shaft 6 to slide such that the first engagement portion 601 of the sliding shaft 6 engages with the second engagement portion 701 of the clutch gear 7 or disengages the first engagement portion 601 of the sliding shaft 6 from the second engagement portion 701 of the clutch gear 7.

[0039] Specifically, in one embodiment, the rotating rod of the first worm gear 3 is provided with locking blocks 12 at both ends. The base 1 is provided with locking slots for locking blocks 12 to engage. There are two locking slots, and the two locking slots correspond one-to-one with the two locking blocks 12. The locking blocks 12 are square in shape. Each of the four sides of the locking block 12 connected end to end is provided with limiting protrusions. The limiting protrusions on the four sides are distributed in a cross shape. The locking slot is a square slot. The four side walls of the locking slot are provided with limiting grooves for locking the limiting protrusions. The first worm gear 3 is detachably installed on the base 1 through the cooperation of the locking blocks 12 and the locking slots, which facilitates the installation and disassembly of the first worm gear 3.

[0040] Specifically, in one embodiment, there are multiple output gears 8, which mesh sequentially. One of the output gears 8 meshes with a clutch gear 7. The output gear 8 meshing with the clutch gear 7 has a larger diameter, while the diameters of the other output gears 8 decrease sequentially, thereby achieving speed reduction transmission.

[0041] like Figures 4 to 8 As shown, specifically, in one embodiment, the drive assembly 9 includes a first limiting plate 901 disposed on the sliding shaft 6, a second limiting plate 902 fixed on the base 1, a spring 903 clamping between the first limiting plate 901 and the second limiting plate 902 and for applying elastic force to the first limiting plate 901 to engage the first engaging portion 601 and the second engaging portion 701, and a drive block 904 for driving the sliding shaft 6 to slide so that the first engaging portion 601 and the second engaging portion 701 separate; the spring 903 is sleeved on the sliding shaft 6 and the transmission shaft 5. The first limiting plate 901 is fixed on the sliding shaft 6 and is integrally formed with the sliding shaft 6 to ensure connection strength. The second limiting plate 902 is fixed to the base 1 by bolts. The second limiting plate 902 is located after the first worm gear 4 and the first limiting plate 901, and the second limiting plate 902 has a circular hole for the transmission shaft 5 to pass through. Under the action of spring 903, the sliding shaft 6 remains in the self-locking position, and the first engaging part 601 of the sliding shaft 6 engages with the second engaging part 701 of the clutch gear 7. When the sliding shaft 6 is pushed to move from the self-locking position to the unlocked position, the first limiting plate 901 compresses the spring 903, and the sliding shaft 6 slides along the direction closer to the transmission shaft 5. The first engaging part 601 of the sliding shaft 6 separates from the second engaging part 701 of the clutch gear 7, thus unlocking the shaft. After the sliding shaft 6 is released, it automatically returns to the self-locking position.

[0042] Specifically, in one embodiment, the drive block 904 is pivotally connected to the base 1 via a pivot 905. The rotation axis of the drive block 904 is parallel to the sliding direction of the sliding shaft 6. The drive block 904 is provided with a sliding groove 906, which has an inner abutting wall 907 for guiding the sliding shaft 6 to slide along the axial direction of the spring 903 so that the first engagement part 601 and the second engagement part 701 are separated. The inner abutting wall 907 abuts against the sliding shaft 6. The inner abutting wall 907 is a concave arc surface. One end of the sliding shaft 6 that abuts against the inner abutting wall 907 is provided with a hemisphere. The spherical surface of the hemisphere abuts against the concave arc surface, and the sliding trajectory of the hemisphere on the inner abutting wall 907 is a circular arc trajectory. When the drive block 904 rotates, under the action of the inner wall 907, the hemisphere gradually approaches the opening of the groove 906. The inner wall 907 presses the sliding shaft 6, causing the sliding shaft 6 to slide towards the drive shaft 5, and the first engagement part 601 and the second engagement part 701 separate. After the drive block 904 is released, under the action of the spring 903, the hemisphere automatically slides away from the drive shaft 5 and along the inner wall 907 to the deepest part of the groove 906, and the first engagement part 601 and the second engagement part 701 engage.

[0043] Specifically, in one embodiment, a guide bar 103 is provided on the base 1; the guide bar 103 is integrally formed with the base 1. The guide bar 103 is arc-shaped and the center of the guide bar 103 coincides with the rotation center of the drive block 904. The drive block 904 is also provided with an arc-shaped guide groove 908 that matches the guide bar 103. The drive block 904 covers the guide bar 103 through the arc-shaped guide groove 908. When the drive block 904 rotates, it slides along the arc trajectory of the guide bar 103, making the sliding of the drive block 904 more stable and smooth.

[0044] Specifically, in one embodiment, the driver further includes a second worm 10 connected to and rotating synchronously with the output shaft, and a second worm wheel 11 connected to and rotating synchronously with the first worm 3. The second worm 10 is directly connected to the output shaft of the motor 2, and the second worm wheel 11 meshes with the second worm 10. The second worm wheel 11 is mounted on the rotating rod of the first worm 3 and rotates synchronously with the first worm 3. The helix angle of the second worm 10 is smaller than the friction angle of the contact surface between the second worm wheel 11 and the second worm 10. The rotational speed of the second worm and the rotational speed of the motor output shaft are both 3000 r / min. The second worm and the second worm wheel perform gear transmission. The second worm is a 3-head worm, and the second worm wheel has 20 teeth, with a tooth ratio of 3:20. The first worm is a 2-head worm, and the first worm wheel has 25 teeth, with a tooth ratio of 2:25. Through the transmission action of the first worm gear, the first worm, the second worm gear, and the second worm, the output speed of the motor is reduced from 3000 r / min to 36 r / min, thus realizing the speed reduction function of the motor.

[0045] Specifically, in one embodiment, the number of worm gear sets in the driver can be set according to actual needs. At least one worm gear set has a worm helix angle smaller than the friction angle between the worm wheel and the worm contact surface. That is, in this application, the helix angle of the first worm 3 can be smaller than the friction angle between the first worm wheel 4 and the first worm 3 contact surface, or the helix angle of the second worm 10 can be smaller than the friction angle between the second worm wheel 11 and the second worm 10 contact surface, or the helix angle of the first worm 3 can be smaller than the friction angle between the first worm wheel 4 and the first worm 3 contact surface, while the helix angle of the second worm 10 is smaller than the friction angle between the second worm wheel 11 and the second worm 10 contact surface.

[0046] Specifically, in one embodiment, the base 1 includes a housing 13; a slot 101; and a cover 102 covering the housing 13; the slot 101; the cover 102 and the housing 13; the slot 101 together form a cavity; the cavity is in a sealed state, serving to prevent dust and water. The housing 13; the slot 101 has a first axial hole communicating with the cavity, and the cover 102 has a second axial hole communicating with the cavity.

[0047] The first worm 3, first worm wheel 4, output gear 8, clutch gear 7, drive shaft 5, second worm 10, and second worm wheel 11 are respectively installed inside the cavity to prevent water and dust from affecting the transmission accuracy of these components. The output shaft passes through the first shaft hole and is connected to the first worm 3. One end of the sliding shaft 6 is located outside the cavity, and the other end of the sliding shaft 6 passes through the second shaft hole and is provided with an insertion hole 602. The output wheel shaft of the output gear 8 extends from the cavity to the outside of the cavity.

[0048] Specifically, in one embodiment, the insertion hole 602 is shaped like a prism 501, and one end of the drive shaft 5 is provided with a prism 501 that matches the insertion hole 602. In this embodiment, the insertion hole 602 is a hole with a regular hexagonal cross-section, and the prism 501 is a hexagonal prism 501, so that the sliding shaft 6 can slide in the insertion hole 602 while rotating under the drive of the drive shaft 5.

[0049] Specifically, in one embodiment, the first engagement part 601 is a bevel gear fixed on the sliding shaft 6. The bevel gear has external teeth, and its diameter gradually increases along the direction away from the transmission shaft 5. A through hole is provided on the clutch gear 7, the axis of which coincides with the axis of the clutch gear 7. The second engagement part 701 is an internal tooth located on the inner wall of the through hole and matches the external teeth. When the sliding shaft 6 switches to the self-locking position, the first engagement part 601 and the second engagement part 701 are fully engaged. Since the diameter of the bevel gear gradually increases along the direction away from the transmission shaft 5, the sliding shaft 6 can no longer slide along this direction, thus achieving positioning. When the sliding shaft 6 switches to the unlocked position, it is positioned by the second limiting plate 902.

[0050] Specifically, in one embodiment, the outer teeth of the bevel gear form a floral conical surface, and the bevel gear is formed by several convex arc surfaces with circular arc cross-sections, with smooth connections between the outer teeth. The inner teeth of the clutch gear 7 form a floral conical surface, and the inner wall of the through hole is provided with several concave arcs to form the inner teeth. The engagement of the convex arc surfaces and concave arcs can reduce the friction of the sliding shaft 6, making the engagement or disengagement of the convex arc surfaces and concave arcs smoother. It can also reduce the rigid collision intensity between the sliding shaft 6 and the clutch gear 7 during the engagement process of the convex arc surfaces and concave arcs, thereby increasing the service life of the sliding shaft 6 and the clutch gear 7.

[0051] Specifically, in one embodiment, the motor 2 includes a housing, a rotor winding with an output shaft installed within the housing, a magnetic tile installed within the housing, and a Hall plate installed on the housing. When the motor is energized, the rotor rotates at high speed under the action of the magnetic tile, driving the second worm gear to rotate rapidly.

[0052] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present invention, and these improvements and substitutions should also be considered within the scope of protection of the present invention.

Claims

1. A driver, characterized in that: The device includes a base, a motor with an output shaft, a first worm gear drivenly connected to the output shaft, a first worm wheel rotatably mounted on the base and meshing with the first worm gear, a drive shaft connected to the first worm wheel, a sliding shaft, a clutch gear, and an output gear meshing with the clutch gear; the helix angle of the first worm gear is smaller than the friction angle of the contact surface between the first worm wheel and the first worm gear. The sliding shaft has an insertion hole, one end of the transmission shaft is slidably disposed in the insertion hole and rotates synchronously with the sliding shaft, the sliding shaft has a first engagement part, and the clutch gear has a second engagement part; The sliding shaft switches between a self-locking position and an unlocking position; when the sliding shaft is in the self-locking position, the first engagement part and the second engagement part engage with each other; when the sliding shaft is in the unlocking position, the first engagement part and the second engagement part disengage. It also includes a drive component for driving the sliding shaft to switch between the self-locking position and the unlocking position; The drive assembly includes a first limiting plate disposed on the sliding shaft, a second limiting plate fixed on the base, a spring clamping between the first limiting plate and the second limiting plate and for applying elastic force to the first limiting plate to make the first biting part and the second biting part bite each other, and a drive block for driving the sliding shaft to slide so that the first biting part and the second biting part separate; the spring is sleeved on the sliding shaft and the transmission shaft; The drive block is pivotally connected to the base via a pivot. The rotation axis of the drive block is parallel to the sliding direction of the sliding shaft. The drive block is provided with a sliding groove. The sliding groove has an abutting inner wall for guiding the sliding shaft to slide along the axial direction of the spring so that the first engagement part and the second engagement part are separated. The abutting inner wall abuts against the sliding shaft. The first engagement part is a bevel gear fixed on the sliding shaft. The bevel gear has external teeth, and the diameter of the bevel gear gradually increases along the direction away from the transmission shaft. The clutch gear has a through hole, and the axis of the through hole coincides with the axis of the clutch gear. The second engagement part is an internal tooth provided on the inner wall of the through hole and matching the external teeth.

2. The driver according to claim 1, characterized in that: The base is provided with a guide bar; the guide bar is arc-shaped, and the center of the guide bar coincides with the rotation center of the drive block. The drive block is also provided with an arc-shaped guide groove that matches the guide bar, and the guide bar slides in the arc-shaped guide groove.

3. The driver according to claim 1, characterized in that: It also includes a second worm gear connected to and rotating synchronously with the output shaft, and a second worm wheel connected to and rotating coaxially with the first worm gear; the second worm wheel meshes with the second worm gear.

4. The driver according to claim 1, characterized in that: The base includes a shell and a cover covering the shell; the cover and the shell together enclose a cavity; the shell has a first axial hole communicating with the cavity, and the cover has a second axial hole communicating with the cavity; The first worm, the first worm wheel, the output gear, the clutch gear, and the transmission shaft are respectively installed in the cavity. The output shaft passes through the first shaft hole and is connected to the first worm for transmission. One end of the sliding shaft is located outside the cavity, and the other end of the sliding shaft passes through the second shaft hole and is provided with the insertion hole.

5. A driver according to claim 1, characterized in that: The socket is prismatic, and one end of the drive shaft is provided with a prismatic shape that matches the socket.

6. A driver according to claim 1, characterized in that: The motor includes a housing, a rotor winding having the output shaft and mounted within the housing, a magnet mounted within the housing, and a Hall plate mounted on the housing.

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