Door handle actuator

Abstract

The invention discloses a door handle actuator, and belongs to the technical field of automobile parts. The door handle actuator comprises a first-stage worm, a second-stage worm and a worm shaft, wherein the first-stage worm and the second-stage worm are meshed with each other. The secondary worm is arranged on the worm shaft in a sleeved mode, an elastic element is arranged between the secondary worm and the worm shaft, and the elastic element elastically applies force to the secondary worm in the direction perpendicular to the axial direction of the secondary worm. According to the door handle actuator, the elastic element is additionally arranged between the second-stage worm and the worm shaft of the second-stage worm, the elastic element can apply elastic force to the second-stage worm and increase resistance in the rotating process of the second-stage worm at the same time, the problem that an automobile door handle actuator is prone to generating abnormal sound is solved, and then the problem that follow-up frequent disassembly and maintenance are needed is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile accessories, and in particular relates to a door handle actuator. Background Art

[0002] The door handle actuator is an important component in the door lock system of modern cars. It is responsible for controlling the pop-up and retraction of the door handle, improving the intelligence and aesthetics of the vehicle, and reducing the wind noise during driving. The door handle actuator is usually composed of a motor, a transmission mechanism, a locking mechanism, a control module and a housing. The motor provides power for the actuator, and the transmission mechanism generally includes a gear, a rack or a screw rod, which converts the rotational motion of the motor into a linear motion to achieve the extension and retraction of the handle. The locking mechanism ensures the stability of the handle in the extended or retracted position, the control module receives the vehicle signal, accurately controls the operation of the motor, and the housing plays a role in protecting the internal components. During use, abnormal noises may occur due to external forces, friction, wear and other reasons. At present, the methods commonly used to solve abnormal noises mainly include optimizing materials, optimizing gear design, increasing lubrication, cleaning, checking and replacing worn parts, etc. In order to optimize the gear design, the utility model patent with the announcement number CN215485375U discloses a hidden door handle actuator for motor vehicles, which includes a shell composed of an upper cover and a lower cover. The housing has a built-in motor, two-start worm, gear worm assembly, gear rod, screw and controller. The motor is connected to the two-start worm, the two-start worm is vertically threaded to the gear worm assembly, the gear worm assembly is threaded to the gear rod, and the gear rod and screw are connected to form a sliding screw transmission. The two-stage worm helical gear reduction design improves the efficiency of the actuator's telescopic movement while achieving the ice-breaking function, and the structure of the rubber sheath greatly reduces the noise of the actuator. However, it was found in actual use that the actuator structure of the above-mentioned worm and helical gear still has the problem of abnormal noise when in use. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a door handle actuator which is not prone to produce abnormal noise.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a door handle actuator, comprising a primary worm and a secondary worm that are meshed with each other, and a worm shaft; the secondary worm is sleeved on the worm shaft, and an elastic element is provided between the secondary worm and the worm shaft, and the elastic element elastically applies force to the secondary worm in a direction perpendicular to the axial direction of the secondary worm.

[0005] The beneficial effects of the present invention are as follows: the door handle actuator provided by the present invention adds an elastic element between the secondary worm and its worm shaft, and the elastic element can apply elastic force to the secondary worm and increase the resistance during the rotation of the secondary worm, so that the entire door handle actuator will not produce abnormal noise during use, and the problem of frequent inspection, disassembly or maintenance is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 is a schematic structural diagram of a door handle actuator of the present invention; Figure 2 It is a schematic structural diagram of the door handle actuator of the present invention from another angle; Figure 3 is a partial structural schematic diagram of a door handle actuator of the present invention; Figure 4 is a partial cross-sectional view of a door handle actuator of the present invention; Figure 5 is a cross-sectional view of a worm shaft and an elastic element of a door handle actuator of the present invention; Figure 6 for Figure 5 A top view of Figure 7 A cross-sectional view of a worm shaft and another elastic element of a door handle actuator of the present invention; Figure 8 for Figure 7 A top view of Description of labels: 1. First-stage worm gear; 2. Secondary worm; 21. Inner hole; 3. Worm shaft; 31. Shaft body; 32. Base; 33. Blind hole; 34. Clearance groove; 4. elastic element; 41. fixed arm; 42. elastic arm; 5. Worm gear; 6. Push rod; 61. Gear parts; 7. Shell. DETAILED DESCRIPTION

[0007] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0008] Please refer to Figure 1 as well as Figure 2 A door handle actuator comprises a primary worm and a secondary worm meshing with each other, and a worm shaft; the secondary worm is sleeved on the worm shaft and can rotate around the worm shaft, an elastic element is provided between the secondary worm and the worm shaft, and the elastic element elastically applies force to the secondary worm in a direction perpendicular to the axial direction of the secondary worm.

[0009] From the above description, it can be seen that the beneficial effect of the present invention is that by adding an elastic element between the secondary worm and the worm shaft of the door handle actuator, the elastic element is in a compressed state when the secondary worm and the worm shaft are assembled. On the one hand, the elastic element elastically applies force to the secondary worm, and on the other hand, it can increase the resistance of the secondary worm when rotating, thereby effectively reducing the problem of abnormal noise generated by the door handle actuator during use.

[0010] In one or more embodiments, a motor is further included, and the motor is connected to the primary worm gear.

[0011] In one or more embodiments, the primary worm is meshed with the secondary worm through a worm wheel, the worm wheel is sleeved on the periphery of the secondary worm, the secondary worm and the worm wheel are integrally formed, and the worm wheel is arranged at one end of the secondary worm close to the worm shaft. The primary worm is driven to rotate by a motor, the primary worm is meshed with the worm wheel, and the secondary worm is driven to rotate by the worm wheel.

[0012] In one or more embodiments, a push rod is further included, and a gear member is sleeved on the outer periphery of the push rod, and the gear member is meshed with a secondary worm. The secondary worm can further drive the push rod to perform linear motion through the gear member, thereby realizing the opening and closing of the door handle. During use, the push rod is usually extended, that is, when the door handle is opened, it is not easy to produce abnormal noise, but when the push rod is retracted, that is, when the door handle is closed (retracted), it is easy to produce abnormal noise. By using the door handle actuator of the present invention, the abnormal noise problem caused by uneven resistance of the transmission mechanism can be overcome, and thus the abnormal noise problem generated when the push rod is retracted can be mainly avoided.

[0013] In one or more embodiments, a housing is further included, and the worm shaft includes a shaft body and a base, and the base is connected to the housing. The base is used to realize the connection between the secondary worm and other structures, and the base can also be integrally formed on other structures to increase the stability of the connection. The housing is used to set various components and keep them in a fixed position, which is also convenient for subsequent installation.

[0014] In one or more embodiments, the elastic element includes a fixed arm and an elastic arm connected to the fixed arm, and the elastic arm is located between the secondary worm and the worm shaft. The elastic element structure can provide elastic force and resistance at the same time, ensuring smooth rotation while avoiding the generation of abnormal noise, without affecting the overall structure and increasing the volume of the entire device.

[0015] In one or more embodiments, a blind hole is provided at one end of the worm shaft, and the fixed arm is disposed in the blind hole.

[0016] In one or more embodiments, a clearance groove is provided on the outer side wall of the worm shaft, and the elastic arm can be partially disposed in the clearance groove. The clearance groove is used to provide clearance space for the elastic arm to prevent the elastic arm from affecting the rotation of the secondary worm.

[0017] In one or more embodiments, an inner hole (not a through inner hole) is provided at one end of the secondary worm, and the worm shaft extends into the inner hole to realize the connection between the secondary worm and the worm shaft, and the elastic arm of the elastic element is arranged between the inner wall of the inner hole and the outer wall of the worm shaft (or the outer wall of the give way groove).

[0018] In one or more embodiments, the elastic element is made of a metal material, such as manganese steel.

[0019] Please refer to Figures 1 to 4 and Figure 7-8 , Embodiment 1 of the present invention is: A door handle actuator comprises a primary worm 1, a secondary worm 2, a worm shaft 3, a worm wheel 5, a push rod 6, an elastic element 4 and a motor; The secondary worm 2, the worm shaft 3 and the worm wheel 5 are coaxially arranged, the worm wheel 5 is arranged on the periphery of the secondary worm 2, and the secondary worm 2 and the worm wheel 5 are integrally formed; the primary worm 1 is meshed with the worm wheel 5, and the primary worm 1 is connected to the motor transmission; One end of the secondary worm 2 is provided with an inner hole 21 along its axial direction; one end of the worm shaft 3 is provided with a blind hole 33 along its axial direction; one end of the worm shaft 3 provided with the blind hole 33 extends into the inner hole 21 to realize the connection between the secondary worm 2 and the worm shaft 3; the worm shaft 3 includes a shaft body 31 and a base 32; a side wall of the shaft body 31 is provided with a clearance groove 34; the outer sleeve of the push rod 6 is connected with a gear member 61, and the gear member 61 is meshed with the secondary worm 2; The elastic element 4 includes a first elastic arm, a fixed arm 41 and a second elastic arm which are connected in sequence and formed as one piece; the fixed arm 41 is arranged in the blind hole 33, the first elastic arm and the second elastic arm extend out of the blind hole 33, and the ends of the first elastic arm and the second elastic arm which are not connected to the fixed arm 41 are arranged toward the worm shaft 3, the fixed arm 31 is U-shaped, and the first elastic arm and the second elastic arm are C-shaped; the elastic element 4 is axially symmetrical; the cross-section of the elastic element 4 is circular; the material of the elastic element 4 is manganese steel.

[0020] Please refer to Figure 1~2 and Figures 5 and 6 , Embodiment 2 of the present invention is: The difference from the first embodiment is that the structure of the elastic element 4 is different. The elastic element 4 of the second embodiment includes a fixed arm 41 and an elastic arm 42 that are interconnected and integrally formed. The fixed arm 41 is arranged in the blind hole 33, and the elastic arm 42 extends from the blind hole 33. The end of the elastic arm 42 that is not connected to the fixed arm 41 is arranged toward the worm shaft 3; the elastic arm 42 is located between the inner wall of the inner hole 21 and the inner wall of the give way groove 24.

[0021] In summary, the present invention provides a door handle actuator that is less likely to produce abnormal noise when the push rod is retracted, which helps to improve the user experience and reduce the frequency of door handle inspection, disassembly, and maintenance.

[0022] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A door handle actuator, characterized in that: It includes a primary worm and a secondary worm that mesh with each other, and a worm shaft; the secondary worm is sleeved on the worm shaft, and an elastic element is provided between the secondary worm and the worm shaft, and the elastic element elastically applies force to the secondary worm in a direction perpendicular to the axial direction of the secondary worm.

2. The door handle actuator according to claim 1, characterized in that The primary worm is meshed with the secondary worm through a worm wheel, and the worm wheel is sleeved on the periphery of the secondary worm.

3. The door handle actuator according to claim 1, characterized in that It also includes a push rod, the outer periphery of which is sleeved with a gear member, and the gear member is meshed with the secondary worm.

4. The door handle actuator according to claim 1, characterized in that It also includes a motor, which is connected to the primary worm gear.

5. The door handle actuator according to claim 1, characterized in that It also includes a shell, the worm shaft includes a shaft body and a base, and the base is connected to the shell.

6. The door handle actuator according to claim 1, characterized in that The elastic element comprises a fixed arm and an elastic arm connected to the fixed arm, and the elastic arm is located between the secondary worm and the worm shaft.

7. The door handle actuator according to claim 6, characterized in that A blind hole is provided at one end of the worm shaft, and the fixed arm is arranged in the blind hole.

8. The door handle actuator according to claim 6, characterized in that A clearance groove is arranged on the outer side wall of the worm shaft, and the elastic arm portion is located in the clearance groove.

9. The door handle actuator according to claim 6, characterized in that An inner hole is provided at one end of the secondary worm, the worm shaft extends into the inner hole, and the elastic arm of the elastic element is arranged between the inner wall of the inner hole and the outer wall of the worm shaft.

10. The door handle actuator according to claim 1, characterized in that The elastic element is made of metal.

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