CN-119787719-B - Actuator, flap assembly and vehicle

Abstract

The application discloses an actuator, a flap assembly and a vehicle. The drive mechanism includes a motor and a resistive torque applying assembly. The motor includes a motor shaft. The resistive torque applying assembly is configured to apply a first resistive torque to the motor shaft when the motor shaft rotates in a first rotational direction and to apply no resistive torque to the motor shaft when the motor shaft rotates in a second rotational direction, or is configured to apply a first resistive torque to the motor shaft when the motor shaft rotates in the first rotational direction and to apply a second resistive torque to the motor shaft when the motor shaft rotates in the second rotational direction. The first rotational direction is opposite to the second rotational direction. The first resistive torque is greater than the second resistive torque. Therefore, when the motor is not electrified, the motor shaft which is favorable for rotating in the first rotation direction is self-locked under the action of the first resistance moment, and the motor shaft which rotates in the second rotation direction is not blocked or continuously rotates under the action of the second smaller resistance moment.

Inventors

• WANG XIANGANG
• MAN HU
• ZHU DAWEI
• ZHANG CANLIN

Assignees

• 比亚迪股份有限公司

Dates

Publication Date

20260505

Application Date

20240919

Claims (20)

1. 1. An actuator is characterized by comprising a driving mechanism, an output shaft, a bidirectional transmission mechanism and a clutch mechanism; The driving mechanism includes: an electric motor including a motor shaft, and A resistive torque application assembly configured to apply a first resistive torque to the motor shaft when the motor shaft rotates in a first rotational direction and not apply a resistive torque to the motor shaft when the motor shaft rotates in a second rotational direction, or configured to apply a first resistive torque to the motor shaft when the motor shaft rotates in the first rotational direction and apply a second resistive torque to the motor shaft when the motor shaft rotates in the second rotational direction, the first resistive torque being greater than the second resistive torque, the first rotational direction being opposite to the second rotational direction, the resistive torque application assembly comprising: A first limit structure configured to limit movement of the motor shaft in the first axial direction and apply the first resistive torque to the motor shaft when the motor shaft is subjected to a first axial force and a torque in the first rotational direction, and A second limit structure configured to limit movement of the motor shaft in the second axial direction and apply the second resistive torque to the motor shaft when the motor shaft is axially subjected to a second axial force and a torque in the second rotational direction, the first axial direction being opposite to the second axial direction; The bi-directional transmission mechanism is connected with the motor shaft and the output shaft and is configured to bidirectionally transmit power between the output shaft and the motor shaft, and the bi-directional transmission mechanism comprises: the first transmission mechanism is arranged on the motor shaft; A second transmission mechanism arranged on the output shaft, and The third transmission mechanism is in transmission connection with the first transmission mechanism and the second transmission mechanism; The clutch mechanism comprises a first clutch part and a second clutch part, the first clutch part is sleeved on the output shaft, the second clutch part is movably sleeved on the output shaft and fixedly connected to the second transmission mechanism, torque is transmitted between the second transmission mechanism and the output shaft when the first clutch part is coupled with the second clutch part, and the transmission of torque between the second transmission mechanism and the output shaft is interrupted when the first clutch part is decoupled from the second clutch part.
2. 2. The actuator of claim 1, wherein the first limit structure has a first friction area when the first limit structure applies the first resistive torque to the motor shaft; When the second limiting structure applies the second resisting moment to the motor shaft, the second limiting structure has a second friction area, and the second friction area is smaller than the first friction area.
3. 3. The actuator of claim 1 wherein the first limit structure comprises a first annular structure disposed about and coupled to the motor shaft and a second annular structure disposed about the motor shaft, the motor shaft driving the first annular structure into abutment with the second annular structure upon application of the first axial force, the first annular structure rotating relative to the second annular structure as the motor shaft rotates in the first rotational direction to generate the first resistive torque.
4. 4. The actuator of claim 3 wherein the motor further comprises a motor housing having a receiving cavity, the first annular structure, the second annular structure, and a portion of the motor shaft being located in the receiving cavity.
5. 5. The actuator of claim 3, wherein the first annular structure is disposed adjacent to the second annular structure.
6. 6. The actuator of claim 3, wherein the second annular structure is a guide structure.
7. 7. The actuator of claim 1, wherein the second limit structure is disposed opposite the free end of the motor shaft in the axial direction of the motor shaft, wherein the free end of the motor shaft abuts the second limit structure under the axial force of the second shaft, and wherein the second resistive torque is generated when the free end of the motor shaft rotates in the second rotational direction relative to the second limit structure.
8. 8. The actuator of claim 7, wherein the free end of the motor shaft has a convex end surface that projects in a direction toward the second limit structure.
9. 9. The actuator of any one of claims 1-8, wherein a first transmission is provided on the motor shaft, the free end of the motor shaft being disposed adjacent the first transmission, the first transmission comprising helical teeth.
10. 10. The actuator of claim 1, wherein the drive mechanism further comprises: and the first rotation detection device is fixed on the motor and is configured to detect a rotation parameter when the motor shaft rotates.
11. 11. The actuator of claim 1, wherein the first resistive torque is greater than or equal to 0.0001N-m and less than or equal to 10N-m.
12. 12. The actuator of claim 1 or 11, wherein the first resistive torque is greater than or equal to 0.0005N-m and less than or equal to 5N-m, or The first resistance moment is greater than or equal to 0.0009 N.m and less than or equal to 1 N.m, or The first moment of resistance is greater than or equal to 0.001 N.m and less than or equal to 0.5 N.m.
13. 13. The actuator of claim 1 or 11, wherein the second resistive torque is greater than 0N-m and less than or equal to 5N-m.
14. 14. The actuator of claim 13, wherein the second resistive torque is greater than 0.00001N-m and less than or equal to 1N-m, or The second resistance moment is greater than or equal to 0.00005 N.m and less than or equal to 0.5 N.m, or The second moment of resistance is greater than or equal to 0.0001 N.m and less than or equal to 0.1 N.m.
15. 15. The actuator of any one of claims 1-8, wherein the first transmission mechanism comprises helical teeth disposed on the motor shaft.
16. 16. The actuator of any one of claims 1-8, wherein the third transmission comprises: a first transmission combination which is adjacently arranged and connected with the first transmission mechanism in a transmission way, and And the second transmission combination is arranged adjacent to the second transmission mechanism and is in transmission connection with the first transmission combination and the second transmission mechanism.
17. 17. The actuator of claim 16 wherein the first transmission includes helical teeth disposed on the motor shaft, the first transmission combination including: a worm in driving connection with the second driving combination, and And the first bevel gear is coaxially connected with the worm and meshed with the spiral teeth.
18. 18. The actuator of claim 17, wherein the second drive combination comprises: A second helical gear engaged with the worm, and The first straight gear is coaxially arranged with the second bevel gear and meshed with the second transmission mechanism.
19. 19. The actuator of claim 18 wherein the second drive combination further comprises a first shaft, the second helical gear and the first spur gear being coupled to the first shaft.
20. 20. The actuator of claim 19, wherein the direction of extension of the worm intersects the direction of extension of the motor shaft, and wherein the direction of extension of the first shaft intersects the direction of extension of the worm and is parallel to the direction of extension of the motor shaft and the output shaft.

Description

Actuator, flap assembly and vehicle Technical Field The application relates to the field of motors, in particular to an actuator, a flap assembly and a vehicle. Background The opening or closing of the filler cap or charge cap of a vehicle is typically accomplished by an actuator, which includes a motor. At present, a motor with a self-locking function cannot unlock self-locking under the condition of power failure or fault, so that potential safety hazards are caused. Disclosure of Invention The application provides an actuator, a flap assembly and a vehicle, wherein the resistance moment born by the motor when the motor rotates in the opposite axial directions is different, so as to at least partially solve the technical problems. According to a first aspect of the present application, there is provided a drive mechanism comprising: an electric motor including a motor shaft, and The device comprises a motor shaft, a resistance moment applying component and a resistance moment applying component, wherein the motor shaft is configured to apply a first resistance moment to the motor shaft when the motor shaft rotates in a first rotating direction, the motor shaft is not applied with a resistance moment when the motor shaft rotates in a second rotating direction, the first rotating direction is opposite to the second rotating direction, or the motor shaft is configured to apply a first resistance moment to the motor shaft when the motor shaft rotates in the first rotating direction, the motor shaft is applied with a second resistance moment when the motor shaft rotates in the second rotating direction, and the first resistance moment is larger than the second resistance moment. According to a second aspect of the present application, the present application also provides an actuator comprising the above-described driving mechanism. According to a third aspect of the present application, there is also provided a flap assembly comprising the actuator described above. According to a fourth aspect of the present application, there is also provided a vehicle comprising the above flap assembly. In the drive mechanism, actuator, flap assembly and vehicle of some embodiments of the present application, the resistive torque applying assembly applies a first, greater resistive torque to the motor shaft when the motor is rotated in a first, axial direction of rotation and applies no resistive torque or a second, lesser resistive torque to the motor shaft when the motor is rotated in a second, axial direction of rotation. Therefore, when the motor is not electrified, the motor shaft which is favorable for rotating along the first rotation direction is self-locked under the action of the first resistance moment, and the motor shaft which is rotated along the second rotation direction is not blocked or continuously rotates under the action of the second smaller resistance moment. In other words, the design of the driving mechanism is beneficial to self-locking when the motor shaft rotates in the first rotation direction when the motor is not electrified and not self-locking when the motor shaft rotates in the second rotation direction. Under the condition that the motor is self-locking, the flap of the flap assembly is opened, larger external force is needed, so that the safety of the flap assembly when the flap is closed is ensured, and the safety of a vehicle is improved. Drawings FIG. 1 is a schematic diagram of a driving mechanism according to some embodiments of the present application under a first external force; FIG. 2 is an enlarged schematic view of a portion of FIG. 1 at A; FIG. 3 is a schematic view of the driving mechanism of FIG. 1 under a second external force; FIG. 4 is an enlarged partial schematic view at B in FIG. 3; FIG. 5 is a schematic view of a driving mechanism according to other embodiments of the present application under a first external force; FIG. 6 is an enlarged partial schematic view of FIG. 5C; FIG. 7 is a schematic view of the driving mechanism of FIG. 5 under a second external force; FIG. 8 is a partially enlarged schematic illustration of FIG. 7 at D; FIG. 9 is a schematic diagram of an actuator according to some embodiments of the application; FIG. 10 is a schematic illustration of the clutch mechanism of the actuator of FIG. 9 in a coupled and uncoupled state; FIG. 11 is an exploded view of a portion of the structure of the actuator of FIG. 9; FIG. 12 is a schematic view of an actuator according to other embodiments of the present application; FIG. 13 is a schematic view of an actuator in one view according to still other embodiments of the present application; FIG. 14 is a schematic view of the actuator of FIG. 13 from another perspective; FIG. 15 is a schematic view of an actuator according to still other embodiments of the present application; FIG. 16 is a schematic illustration of the clutch mechanism of the actuator of FIG. 15 in a coupled and uncoupled state; FIG. 17 is an explod