Actuator

Abstract

The utility model provides an actuator which comprises a shell, a motor is arranged in the shell, a worm is arranged on an output shaft of the motor, a first-stage transmission gear is arranged below the worm and meshed with the worm, the worm is driven by the motor to drive the first-stage transmission gear to rotate, a second-stage transmission gear is arranged on the right side of the first-stage transmission gear, and the second-stage transmission gear is meshed with the worm. The secondary transmission gear is meshed with the primary transmission gear, a double-stay-wire cam is arranged on the secondary transmission gear, an arc-shaped groove is formed in the double-stay-wire cam, stay wire heads are installed in the arc-shaped groove, the double-stay-wire cam comprises an upper layer and a lower layer, and the arc-shaped groove is formed in each layer and used for fixing the two stay wire heads. Therefore, the double-stay-wire cam pulls different stay wires when the motor is driven by forward rotation or reverse rotation, the stay wires can act independently according to needs in the working process, and the working adaptability is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile door locks, and in particular to an actuator. Background Art

[0002] At present, it is very common to use an actuator as an electric actuator during the operation of vehicle door locks. The current actuator generally drives a rotating wheel through a motor, and then pulls a pull wire to transmit a signal. The current actuator can generally only pull one pull wire. For example, the published patent 2018105269807 discloses an automatic door lock actuator for a car, which also drives a gear through a motor, and the gear drives the pull wire to move, so that it generates a pulling signal and completes the execution action. However, the above structure can only pull one pull wire during the operation, and its functional expansion is limited. If more than two pull wires are forcibly installed, when one is pulled, another will inevitably be pulled, resulting in the inability to control them separately. The current solution is generally to use multiple actuators to work, but this increases the cost of the car door lock. Therefore, it is particularly important to solve the problem that the current ordinary actuator can only control one pull wire. Summary of the invention

[0003] The purpose of the present invention is to provide an actuator, which drives multiple pull wires to move through a secondary transmission gear and a double-wire pull cam to realize the control of multiple pull wires by one actuator, and at the same time fixes the pull wire head through the arc groove on the secondary gear and the double-wire pull cam, so that the double-wire pull cam pulls different pull wires when the motor rotates forward or reverse, so that multiple pull wires can move independently as needed during work, thereby improving work adaptability. At the same time, the mechanical action of the double-wire pull cam can be realized, which solves the problem that the current ordinary actuator can only control one or two pull wires and can only be operated electrically.

[0004] The present invention provides an actuator, including a shell, in which a motor is arranged, a worm is arranged on the output shaft of the motor, a primary transmission gear is arranged below the worm, the primary transmission gear is meshed with the worm, the worm is driven by the motor to drive the primary transmission gear to rotate, a secondary transmission gear is arranged on the right side of the primary transmission gear, the secondary transmission gear is meshed with the primary transmission gear, a double wire pulling cam is arranged on the double wire pulling cam, an arc-shaped groove is arranged on the double wire pulling cam, a wire pulling head is installed in the arc-shaped groove, the double wire pulling cam includes an upper and lower layer, and each layer is provided with an arc-shaped groove for fixing two wire pulling heads.

[0005] A further improvement is that a circular through groove is also provided on the double-wire pulling cam located at the upper layer, and the wire pulling head is installed on the cam through the circular through groove.

[0006] A further improvement is that a circular through groove is also provided on the secondary transmission gear, and the wire pulling head is installed on the secondary transmission gear through the circular through groove.

[0007] A further improvement is that: wire mounting holes are provided on the left and right sides of the shell, and the number of the wire mounting holes is consistent with the number of the wires.

[0008] A further improvement is that a fixing column is installed on the shell, and the shell is installed on the vehicle through the fixing column.

[0009] A further improvement is that a shaft sleeve is provided at one end of the worm away from the motor, and the position of the worm is fixed by the shaft sleeve.

[0010] A further improvement is that a groove is provided on the upper part of the secondary transmission gear, and a micro switch is provided at the corresponding position of the housing and the groove. The position state of the secondary transmission gear is judged by the micro switch, and then the initial state of the actuator and the pull wire is fed back.

[0011] A further improvement is that a wiring harness connector is provided on the housing, and power is provided to the motor and the switch state is detected through the wiring harness connector.

[0012] A further improvement is that the fixing column is made of a flexible material and a shock absorbing material is provided on the fixing column.

[0013] The beneficial effects of the present invention are as follows: multiple pull wires are driven to move by the secondary transmission gear and the double pull wire cam thereon, thereby realizing the control of multiple pull wires and one actuator; at the same time, the pull wire head is fixed by the arc groove on the double pull wire cam, so that the double pull wire cam pulls different pull wires when the motor rotates forward or reversely, so that multiple pull wires can move independently as needed during work, thereby improving work adaptability; at the same time, the position state of the secondary transmission gear is judged by the micro switch, which is convenient for judging the movement of the pull wire. When a problem occurs, the judgment can be completed in time, prompting timely completion of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the structural appearance of the present invention.

[0015] Figure 2 It is the internal installation diagram of the shell of the present invention.

[0016] Figure 3 It is a schematic diagram of the lower structure of the secondary transmission gear of the present invention.

[0017] Figure 4 It is an enlarged view of the micro switch structure of the present invention.

[0018] Figure 5 It is an enlarged view of the fixing column structure of the present invention.

[0019] Among them: 1-housing, 2-motor, 3-worm, 4-primary transmission gear, 5-secondary transmission gear, 6-double wire pulling cam, 7-arc groove, 8-wire pulling head, 9-circular through groove, 10-wire pulling protective cover, 11-fixing column, 12-shaft sleeve, 13-groove, 14-micro switch, 15-wiring harness connector, 16-shock absorbing material. DETAILED DESCRIPTION

[0020] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0021] like Figure 1-3 As shown, this embodiment provides an actuator, including a housing 1, wherein a motor 2 is arranged in the housing 1, a worm 3 is arranged on the output shaft of the motor 2, a primary transmission gear 4 is arranged below the worm 3, the primary transmission gear 4 is meshed with the worm 3, and the motor 2 drives the worm 3 to drive the primary transmission gear 4 to rotate, a secondary transmission gear 5 is arranged on the right side of the primary transmission gear 4, the secondary transmission gear 5 is meshed with the primary transmission gear 4, a double wire pulling cam 6 is arranged on the double wire pulling cam 6, an arc groove 7 is arranged on the double wire pulling cam 6, a wire pulling head 8 is installed in the arc groove 7, the double wire pulling cam 6 includes an upper and lower layer, and each layer is provided with an arc groove 7 for fixing two wire pulling heads 8. An arc groove 7 is also arranged on the secondary transmission gear, and the wire pulling head 8 of the third wire pulling is fixed by the arc groove 7. Wire pulling installation holes 10 are arranged on the left and right sides of the housing 1, and the number of the wire pulling installation holes 10 is consistent with the number of wire pulling. A fixing column 11 is installed on the housing 1, and the housing 1 is installed on the vehicle through the fixing column 11. A sleeve 12 is provided at the end of the worm 3 away from the motor 2, and the position of the worm 3 is fixed by the sleeve 12. A groove 13 is provided on the upper part of the secondary transmission gear 5, and a micro switch 14 is provided at the corresponding position of the housing 1 and the groove 13. The position state of the secondary transmission gear 5 is judged by the micro switch 14 and the state of the pull wire is fed back. A wiring harness connector 15 is provided on the housing 1, and power and signals are provided to each component through the wiring harness connector 15. The fixing column 11 is made of a flexible material, and a shock-absorbing material 16 is provided on the fixing column 11.

[0022] Working principle: the motor 2 is energized and rotates, driving the worm 3 to rotate, and the thread on the worm 3 drives the primary transmission gear 4 to rotate, and the primary transmission gear 4 is meshed with the secondary transmission gear 5, and the primary transmission gear 4 drives the secondary transmission gear 5 to rotate, and the double wire pulling cam 6 on the secondary transmission gear 5 follows the secondary transmission gear 5 to rotate, and the two wire pulling heads 8 are installed in the arc groove 7 on the double wire pulling cam 6, and the arc center of the arc groove 7 is the center of the circle of the double wire pulling cam 6. When the double wire pulling cam 6 rotates forward, one wire pulling head 8 is stuck in the end of the arc groove 7 on one side, and the other wire pulling head 8 slides in the groove of the arc groove 7 on the other side, so that one wire pulling head 8 is pulled by the arc groove 7, and the other wire pulling head 8 slides in the arc groove 7 without generating tension, so that the wire is pulled alone. In the reversal process, the other pull wire head 8 is stuck in the end of the arc-shaped groove 7 on the other side, and one pull wire head 8 slides in the groove of the arc-shaped groove 7 on one side, so that the other pull wire head 8 is pulled by the arc-shaped groove 7. The other end of the pull wire head 8 at the arc-shaped groove 7 can be pulled back to the initial position by the cam.

[0023] The third wire pulling head 8 is also stuck in the circular through groove of the secondary transmission wheel. The pulling principle is the same as that of the first two wire pulling heads, so that the wires can move independently.

[0024] like Figure 4 As shown, in the initial position, the micro switch 14 is located exactly in the groove 13 on the secondary transmission gear 5. When the secondary transmission gear 5 rotates forward or reverse, the micro switch 14 will be triggered by the feature on the transmission gear, and the switch signal will change.

[0025] By providing the shaft sleeve 12, the worm 3 is protected and the assembly accuracy is improved, the service life of the equipment is increased, and the generation of noise is reduced.

[0026] like Figure 5 As shown, the fixing column 11 is made of a flexible material, and a shock-absorbing material 16 is provided on the fixing column 11. The flexible material and the shock-absorbing structure are used to buffer and reduce noise of the entire device.

[0027] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An actuator, comprising a housing (1), wherein a motor (2) is arranged in the housing (1), a worm (3) is arranged on the output shaft of the motor (2), a primary transmission gear (4) is arranged below the worm (3), the primary transmission gear (4) is meshed with the worm (3), the motor (2) drives the worm (3) and further drives the primary transmission gear (4) to rotate, a secondary transmission gear (5) is arranged on the right side of the primary transmission gear (4), the secondary transmission gear (5) is meshed with the primary transmission gear (4), and the actuator is characterized in that: The secondary transmission gear (5) is provided with a double wire-pulling cam (6), the double wire-pulling cam (6) is provided with an arc-shaped groove (7), a wire-pulling head (8) is installed in the arc-shaped groove (7), the double wire-pulling cam (6) comprises an upper and lower layer, and each layer is provided with an arc-shaped groove (7) for fixing two wire-pulling heads (8), the secondary transmission gear (5) is also provided with an arc-shaped groove (7), a wire-pulling head (8) is installed in the arc-shaped groove (7).

2. An actuator according to claim 1, characterized in that: The double-wire pulling cam (6) located at the upper layer is also provided with a circular through slot (9), and the wire pulling head (8) is used to install the wire pulling onto the cam (6) through the circular through slot (9).

3. An actuator according to claim 1, characterized in that: The secondary transmission gear (5) is also provided with a circular through slot (9), and the wire pulling head (8) is installed on the secondary transmission gear (5) through the circular through slot (9).

4. An actuator according to claim 1, characterized in that: The housing (1) is provided with wire mounting holes (10) on the left and right sides, and the number of the wire mounting holes (10) is the same as the number of the wires.

5. An actuator according to claim 1 or 4, characterized in that: A fixing column (11) is mounted on the housing (1), and the actuator is mounted on the vehicle via the fixing column (11).

6. An actuator according to claim 1, characterized in that: A shaft sleeve (12) is provided at one end of the worm (3) away from the motor (2), and the position of the worm (3) is fixed by the shaft sleeve (12).

7. An actuator according to claim 1, characterized in that: A groove (13) is provided on the upper portion of the secondary transmission gear (5), and a micro switch (14) is provided at a corresponding position between the housing (1) and the groove (13). The position state of the secondary transmission gear (5) is judged by the state of the micro switch (14), thereby providing feedback on whether the actuator and the pull wire are in the initial position.

8. An actuator according to claim 5, characterized in that: The housing (1) is provided with a wiring harness connector (15), and power is provided to the motor and a switch state is detected via the wiring harness connector (15).

9. An actuator according to claim 5, characterized in that: The fixing column (11) is made of a flexible material, and a shock absorbing material (16) is provided on the fixing column (11).

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