Actuator worm sealing structure

Abstract

The utility model discloses an actuator worm sealing structure, and relates to the technical field of automobile parts. Comprising a check ring, the check ring is arranged on a worm in a sleeving mode, the check ring comprises a supporting framework and a sealing ring wrapping the supporting framework, at least two sealing main lips are arranged on an inner ring of the sealing ring, and springs corresponding to the two sealing main lips are further arranged on the two sides of the sealing ring in a sleeving mode. Due to the arrangement of the receding notches, a user can conveniently install a spring, the spring can continuously apply pressure to the sealing main lips and the sealing auxiliary lips, good sealing performance is kept between the sealing main lips and the worm and between the sealing auxiliary lips and the worm, the two sealing main lips and the two sealing auxiliary lips are matched, four sealing structures and four-stage sealing are arranged at the telescopic position of the worm, and the sealing effect is good. And the positioning groove is matched with the positioning protrusion, so that the stability of the check ring after assembly is guaranteed, and rotation and front-back movement cannot occur.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to an actuator worm gear sealing 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] Most existing door handle actuators on the market use simple sealing rings to seal the telescopic worm gear inside. This sealing method is ineffective and can easily allow external air to enter the actuator housing through the worm gear and sealing ring, contaminating the joints inside the actuator housing and affecting the service life of the internal structure of the actuator housing. Summary of the Invention

[0004] This invention provides an actuator worm gear sealing 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 sealing structure, including a retaining ring, the retaining ring being sleeved on the worm gear, the retaining ring including a support frame and a sealing ring covering the outside of the support frame, the inner ring of the sealing ring being provided with no less than two sealing main lips, and springs corresponding to the two sealing main lips being sleeved on both sides of the sealing ring.

[0006] Furthermore, the inner ring of the sealing ring is provided with at least two sealing secondary lips, which correspond to the two sealing primary lips respectively.

[0007] Furthermore, clearance notches are provided on both sides of the sealing ring.

[0008] Furthermore, the interior of the clearance notch is provided with an annular groove, and the spring is movably sleeved inside the annular groove.

[0009] Furthermore, both the support frame and the outer ring of the sealing ring are provided with positioning protrusions.

[0010] Furthermore, the worm gear is movably disposed inside the actuator housing, and the actuator housing is provided with a sealing groove for installing a retaining ring.

[0011] Furthermore, positioning grooves are provided on both sides of the sealing groove, and one end of the positioning protrusion extends into the interior of the positioning groove.

[0012] Furthermore, one end of the worm gear passes through the retaining ring and extends to the outside of the actuator housing, while the other end is provided with a double-headed worm gear via an ejector screw.

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

[0014] The actuator worm gear sealing structure features an avoidance notch, facilitating spring installation. The spring continuously applies pressure to the main and secondary sealing lips, ensuring a good seal between them and the worm. The combination of two main and two secondary sealing lips creates a four-level sealing structure at the worm's extension point, further guaranteeing the sealing effect. The positioning groove and positioning protrusion ensure the stability of the retaining ring after assembly, preventing rotation and forward / backward movement. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0016] Figure 2 This is a cross-sectional view of the retaining ring structure of this utility model;

[0017] Figure 3 This is an exploded view of the actuator housing structure of this utility model.

[0018] In the diagram: 1. Retaining ring; 11. Support frame; 12. Sealing ring; 13. Main sealing lip; 14. Secondary sealing lip; 15. Clearance notch; 151. Annular groove; 16. Spring; 17. Positioning protrusion; 2. Worm gear; 21. Ejection screw; 22. Double-ended worm gear; 3. Actuator housing; 31. Sealing groove; 32. Positioning groove. Detailed Implementation

[0019] 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.

[0020] Please see Figure 1-3 This utility model discloses an actuator worm gear sealing structure, including a retaining ring 1, which is sleeved on the worm gear 2. The retaining ring 1 includes a support frame 11 and a sealing ring 12 covering the outside of the support frame 11. The inner ring of the sealing ring 12 is provided with no less than two sealing main lips 13. Springs 16 corresponding to the two sealing main lips 13 are also sleeved on both sides of the sealing ring 12.

[0021] Specifically, the inner ring of the sealing ring 12 is also provided with at least two sealing secondary lips 14. The two sealing secondary lips 14 correspond to the two sealing main lips 13 respectively. The cooperation of the two sealing main lips 13 and the two sealing secondary lips 14 makes the extension and retraction of the worm gear 2 have four sealing structures and four levels of sealing, which further ensures the sealing effect of the extension and retraction of the worm gear 2.

[0022] Specifically, both sides of the sealing ring 12 are provided with clearance notches 15, and the interior of the clearance notch 15 is provided with an annular groove 151. The spring 16 is movably sleeved inside the annular groove 151. The clearance notch 15 facilitates the user's installation of the spring 16. The spring 16 is an oil seal spring 16, which can apply pressure to the sealing main lip 13 and sealing secondary lip 14, so that the sealing main lip 13 and sealing secondary lip 14 maintain good sealing performance with the worm gear 2.

[0023] Specifically, the outer rings of the support frame 11 and the sealing ring 12 are both provided with positioning protrusions 17. The worm gear 2 is movably disposed inside the actuator housing 3. The actuator housing 3 is provided with a sealing groove 31 for installing the retaining ring 1. Positioning grooves 32 are provided on both sides of the sealing groove 31. One end of the positioning protrusion 17 extends into the interior of the positioning groove 32. The positioning groove 32 cooperates with the positioning protrusion 17 to ensure the stability of the retaining ring 1 after assembly, and it will not rotate or move back and forth.

[0024] Specifically, one end of the worm 2 passes through the retaining ring 1 and extends to the outside of the actuator housing 3, while the other end is provided with a double-headed worm 22 via an ejector screw 21. The part of the worm 2 that extends out of the actuator housing 3 is a smooth rod. The ejector screw 21 is driven to rotate by a motor inside the actuator housing 3. The ejector screw 21 drives the double-headed worm 22 to mesh with a nut inside the actuator housing 3. The nut is fixed, so as to realize the worm 2 can rotate and extend at the same time.

[0025] In summary, the worm gear sealing structure of this actuator, with the avoidance notch 15, facilitates the installation of the spring 16 by the user. The spring 16 can continuously apply pressure to the main sealing lip 13 and the secondary sealing lip 14, ensuring good sealing between the main sealing lip 13 and the secondary sealing lip 14 and the worm gear 2. The cooperation of the two main sealing lips 13 and the two secondary sealing lips 14 results in a four-level sealing structure at the extension and retraction point of the worm gear 2, further guaranteeing the sealing effect at the extension and retraction point of the worm gear 2. The positioning groove 32, in conjunction with the positioning protrusion 17, ensures the stability of the retaining ring 1 after assembly, preventing rotation and back-and-forth movement.

[0026] 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 sealing structure, comprising a retaining ring (1), characterized in that: The retaining ring (1) is sleeved on the worm (2). The retaining ring (1) includes a support frame (11) and a sealing ring (12) covering the outside of the support frame (11). The inner ring of the sealing ring (12) is provided with no less than two sealing main lips (13). The two sides of the sealing ring (12) are also sleeved with springs (16) corresponding to the two sealing main lips (13).

2. The actuator worm gear sealing structure according to claim 1, characterized in that: The inner ring of the sealing ring (12) is also provided with at least two sealing secondary lips (14), and the two sealing secondary lips (14) correspond to the two sealing main lips (13) respectively.

3. The actuator worm gear sealing structure according to claim 1, characterized in that: Both sides of the sealing ring (12) are provided with clearance notches (15).

4. The actuator worm gear sealing structure according to claim 3, characterized in that: The clearance notch (15) has an annular groove (151) inside, and the spring (16) is movably sleeved inside the annular groove (151).

5. The actuator worm gear sealing structure according to claim 1, characterized in that: The outer rings of the support frame (11) and the sealing ring (12) are both provided with positioning protrusions (17).

6. The actuator worm gear sealing structure according to claim 5, characterized in that: The worm gear (2) is movably disposed inside the actuator housing (3), and the actuator housing (3) is provided with a sealing groove (31) for installing the retaining ring (1).

7. The actuator worm gear sealing structure according to claim 6, characterized in that: Both sides of the sealing groove (31) are provided with positioning grooves (32), and one end of the positioning protrusion (17) extends into the interior of the positioning groove (32).

8. The actuator worm gear sealing structure according to claim 1, characterized in that: One end of the worm (2) passes through the retaining ring (1) and extends to the outside of the actuator housing (3), while the other end is provided with a double-headed worm (22) via the push-out screw (21).

Images