Worm driving structure of actuator

Abstract

The utility model discloses an actuator worm driving structure, and relates to the technical field of automobile parts. Comprising a double-end worm and a double-end nut, the double-end worm is arranged in an actuator shell, the double-end nut is arranged on the double-end worm in a sleeving mode, a limiting groove connected with the outer portion of the double-end nut in a sleeving mode is formed in the actuator shell, a PTFE coating is arranged on the surface of the double-end worm, a tungsten carbide coating is arranged in the double-end nut, and the outer portion of the double-end nut is sleeved with the limiting groove. And a limiting plate is arranged outside the double-end nut. The double-end nut and the actuator shell are assembled in a split mode, threads do not need to be arranged in the actuator shell, the machining difficulty of the actuator shell is reduced, the double-end nut can be detached and independently replaced after being damaged, the whole actuator shell does not need to be replaced, and the use cost is reduced. And the PTFE coating on the double-end worm is matched with the tungsten carbide coating in the double-end nut, so that the double-end worm rotates more flexibly, jamming is avoided, and use is more convenient.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to an actuator worm gear drive structure. Background Technology

[0002] Concealed door handle actuators are typically used on concealed door handles in automobiles. Installed on the door handle, they drive an actuator rod to perform repetitive linear motion via the forward or reverse rotation of the motor's output shaft, thus opening and closing the concealed door handle. This design fully utilizes the limiting surface formed on the actuator rod and the mating surface within the housing to achieve both anti-rotation and linear movement guidance. However, existing concealed door handle actuators still have the following shortcomings in use:

[0003] The existing hidden door handle actuators on the market use a double-headed worm gear drive mechanism, which involves several threads inside the actuator housing that engage with the double-headed worm gear. This design undoubtedly increases the difficulty of processing the actuator housing, raises manufacturing costs, and requires the replacement of the entire actuator housing or the entire actuator if the threads are damaged. This results in high long-term operating costs and unsatisfactory performance. Summary of the Invention

[0004] This invention provides an actuator worm gear drive structure to solve the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an actuator worm gear drive structure, including a double-ended worm gear and a double-ended nut, wherein the double-ended worm gear is disposed inside the actuator housing, the double-ended nut is sleeved on the double-ended worm gear, and the actuator housing is provided with a limiting groove that engages with the outside of the double-ended nut.

[0006] Furthermore, the surface of the double-headed worm gear is coated with PTFE.

[0007] Furthermore, the interior of the double-ended nut is coated with tungsten carbide.

[0008] Furthermore, a limiting plate is provided on the outside of the double-ended nut.

[0009] Furthermore, straight-edge positioning parts are provided on both sides of the limiting plate.

[0010] Furthermore, positioning grooves are provided on both sides of the inner wall of the limiting groove, and the two straight edge positioning parts are respectively engaged with the two positioning grooves.

[0011] Furthermore, one end of the double-headed worm gear is provided with an ejector screw.

[0012] Furthermore, a push rod is provided at the end of the ejector screw away from the double-ended worm gear.

[0013] Compared with the prior art, the present invention provides an actuator worm gear drive structure, which has the following beneficial effects:

[0014] This actuator features a worm gear drive structure with a double-ended nut, which is separately assembled from the actuator housing. This eliminates the need for internal threads in the actuator housing, reducing the machining difficulty. Damaged double-ended nuts can be disassembled and replaced independently without replacing the entire actuator housing, thus lowering operating costs. The PTFE coating on the double-ended worm gear, combined with the tungsten carbide coating inside the double-ended nut, makes the worm gear rotate more flexibly, preventing jamming and making it more convenient to use. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 This is an exploded view of the actuator housing structure of this utility model.

[0017] In the diagram: 1. Double-ended worm gear; 11. Ejector screw; 12. Push rod; 13. PTFE coating; 2. Double-ended nut; 21. Limiting plate; 22. Straight edge positioning part; 23. Tungsten carbide coating; 3. Actuator housing; 31. Limiting groove; 32. Positioning groove. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figure 1-2 This utility model discloses an actuator worm gear drive structure, including a double-headed worm gear 1 and a double-headed nut 2. The double-headed worm gear 1 is disposed inside the actuator housing 3, and the double-headed nut 2 is sleeved on the double-headed worm gear 1. The actuator housing 3 is provided with a limiting groove 31 that engages with the outside of the double-headed nut 2.

[0020] Specifically, the surface of the double-ended worm gear 1 is provided with a PTFE coating 13. The PTFE coating 13 is an excellent solid lubricant, especially suitable for use with the double-ended worm gear 1 and the double-ended nut 2. It can reduce friction and wear, and has anti-corrosion properties. In addition, the PTFE coating 13 also has good chemical resistance, water resistance and heat resistance, and can withstand high temperatures up to 500°F (about 260°C), making it very suitable for extreme high temperature applications.

[0021] Specifically, the double-ended nut 2 has a tungsten carbide coating 23 inside. The tungsten carbide coating 23 has extremely high hardness and excellent wear resistance, which can maintain performance in harsh working environments. In addition, it also has good corrosion resistance and oxidation resistance, further enhancing the durability of the double-ended nut 2.

[0022] Specifically, the double-headed nut 2 is provided with a limiting plate 21 on its outside. Both sides of the limiting plate 21 are provided with straight edge positioning parts 22. Both sides of the inner wall of the limiting groove 31 are provided with positioning grooves 32. The two straight edge positioning parts 22 are respectively engaged with the two positioning grooves 32. The cooperation between the straight edge positioning parts 22 and the positioning grooves 32 ensures the installation stability of the double-headed nut 2. The positioning grooves 32 lock the straight edge positioning parts 22, ensuring the fixed state of the double-headed nut 2 and preventing the double-headed nut 2 from rotating.

[0023] Specifically, one end of the double-headed worm gear 1 is provided with a push screw 11, and the end of the push screw 11 away from the double-headed worm gear 1 is provided with a push rod 12. The push screw 11 is driven by a motor inside the actuator housing 3, and the push screw 11 is relatively long. When driven by the motor, it can rotate while driving the double-headed worm gear 1 to rotate. Since the double-headed nut 2 is fixed, the double-headed worm gear 1 can rotate and move forward at the same time. Reversing the motor can make the double-headed worm gear 1 rotate and move backward at the same time.

[0024] In summary, the worm gear drive structure of this actuator, with its double-ended nut 2 and separate assembly from the actuator housing 3, eliminates the need for internal threads in the actuator housing 3, reducing the machining difficulty of the actuator housing 3. The double-ended nut 2 can be disassembled and replaced independently if damaged, without replacing the entire actuator housing 3, thus reducing operating costs. The PTFE coating 13 on the double-ended worm gear 1, in conjunction with the tungsten carbide coating 23 inside the double-ended nut 2, makes the double-ended worm gear 1 rotate more flexibly, preventing jamming and making it more convenient to use.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An actuator worm gear drive structure, comprising a double-ended worm (1) and a double-ended nut (2), characterized in that: The double-headed worm gear (1) is located inside the actuator housing (3), and the double-headed nut (2) is sleeved on the double-headed worm gear (1). The actuator housing (3) has a limiting groove (31) that engages with the outside of the double-headed nut (2).

2. The actuator worm gear drive structure according to claim 1, characterized in that: The surface of the double-headed worm (1) is provided with a PTFE coating (13).

3. The actuator worm gear drive structure according to claim 1, characterized in that: The interior of the double-ended nut (2) is coated with tungsten carbide (23).

4. The actuator worm gear drive structure according to claim 1, characterized in that: The double-headed nut (2) is provided with a limiting plate (21) on its outside.

5. The actuator worm gear drive structure according to claim 4, characterized in that: The limiting plate (21) is provided with straight edge positioning parts (22) on both sides.

6. The actuator worm gear drive structure according to claim 5, characterized in that: The inner wall of the limiting groove (31) is provided with positioning grooves (32) on both sides, and the two straight edge positioning parts (22) are respectively engaged with the two positioning grooves (32).

7. The actuator worm gear drive structure according to claim 1, characterized in that: One end of the double-headed worm gear (1) is provided with an ejector screw (11).

8. The actuator worm gear drive structure according to claim 7, characterized in that: A push rod (12) is provided at the end of the ejector screw (11) away from the double-headed worm (1).

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