Rotation stopping gasket

Abstract

The utility model discloses a rotation stopping gasket, belongs to the technical field of wiper motors, and solves the problem that a gasket on an existing wiper motor can rotate along with a gear shaft. The gasket comprises a gasket body in an annular plate structure shape, an inner ring of the gasket body is used for being in clearance fit with a gear shaft of the reduction gearbox, a plurality of clamping heads are integrally formed on the outer ring face of the gasket body, and the free end of each clamping head is obliquely and downwards arranged and used for being embedded into a clamping groove in the end face of the reduction gearbox. The clamping heads on the outer ring face of the gasket body are embedded into the clamping grooves in the end face of the reduction gearbox, so that when the wiper motor works, the gasket cannot rotate along with a gear shaft, the reduction gearbox and the gasket cannot be abraded mutually, the stability of the gear shaft and the lubricating performance of an oil bearing are guaranteed, and the service life of the wiper motor is prolonged. And the automobile windscreen wiper system can stably run for a long time.

Description

Technical Field

[0001] This utility model relates to the field of wiper motor technology, specifically to an anti-rotation washer. Background Technology

[0002] The windshield wiper system is essential for a car to operate normally in various inclement weather conditions. As the core module of the entire system, the wiper motor plays a crucial role. If the wiper motor gear shaft becomes loose, problems such as brush edge shaving and motor gear shaving will occur, directly affecting the normal operation of the entire system.

[0003] In existing technology, because the metal washer has a flat, ring-shaped structure, it rotates with the gear shaft during wiper motor operation. After prolonged use, the rotating washer wears pits into the wiper motor's gearbox, creating axial clearance and causing the gear shaft to move erratically. Simultaneously, the metal powder generated by friction is absorbed by the grease in the oil-impregnated bearing, reducing its lubrication and leading to circumferential loosening of the gear shaft, thus affecting the normal operation of the entire automotive wiper system. Utility Model Content

[0004] To address the aforementioned problems in the prior art, this utility model provides an anti-rotation washer, which solves the problem that the washer on the existing wiper motor rotates with the gear shaft.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] An anti-rotation washer is provided, comprising a washer body in the form of an annular plate structure. The inner ring of the washer body is used for clearance fit on the gear shaft of a gearbox. The outer ring surface of the washer body is integrally formed with multiple clips. The free end of each clip is inclined downward and used to be embedded in a groove on the end face of the gearbox.

[0007] The beneficial effect of this solution is that by tilting and embedding multiple clips on the outer ring surface of the washer body into the slots on the end face of the gearbox, the washer will not rotate with the gear shaft when the wiper motor is working, so that the gearbox and the washer will not wear against each other, ensuring the stability of the gear shaft and the lubrication performance of the oil-impregnated bearing, and enabling the car wiper system to operate stably for a long time.

[0008] Furthermore, multiple clamps are evenly distributed on the outer ring surface of the washer body. The evenly distributed clamps help to disperse the stress points and improve the stability and reliability of the anti-rotation washer.

[0009] Furthermore, multiple slots are evenly spaced along the outer ring surface of the washer body end face, with each slot corresponding to a specific clamping head. Each clamping head includes a pointed plate positioned on either side of the corresponding slot. The two pointed plates are respectively embedded into two recessed grooves on the gearbox end face, allowing the slot between them to also engage with the rib plate between the two recessed grooves. This improves the gripping force and stability of the clamping head, better preventing the washer from rotating with the gear shaft.

[0010] Furthermore, each pointed plate is a triangular plate structure, and the bottom surface of each pointed plate is connected to the outer annular surface of the washer body with a rounded transition. The rounded transition avoids stress concentration caused by direct bending, which can increase the strength and durability of the clamp.

[0011] Furthermore, the two mutually distant sides of the two pointed plates in each clamp are arc surfaces with the same diameter as the outer circumference of the washer body. This design of the pointed plates reduces the processing cost of the washer body.

[0012] Furthermore, the two adjacent sides of the two pointed plates in each clamp gradually approach each other along the radial direction of the washer body. The gradually approaching pointed plates help improve the locking effect of the clamp in the clamp slot, further preventing the washer from rotating with the gear shaft.

[0013] Furthermore, the tilt angle of each tip is 45° to 60°. This tilt angle of the tips ensures that the jaws have sufficient grip to prevent the washers from rotating.

[0014] Furthermore, a retaining ring is provided on the top surface of the washer body. The retaining ring is used for threaded connection to the gear shaft and for limiting the position of the washer body. The retaining ring effectively prevents the washer from moving up and down along the gear shaft, ensuring its fixed position and thus improving the stability of the entire device.

[0015] Furthermore, the retaining ring is a conical plate, with an integrally bent upward ring plate at its large-diameter end. The bottom of the ring plate, where it connects to the large-diameter end of the retaining ring, abuts against the top surface of the washer body. This design of the retaining ring not only enhances its overall strength but also provides better positioning, ensuring the positional stability of the washer body. Attached Figure Description

[0016] Figure 1 A schematic diagram of the assembly of the stop washer and the gear shaft;

[0017] Figure 2 for Figure 1 Enlarged view of point I in the middle;

[0018] Figure 3 The front view of the stop-rotation washer;

[0019] Figure 4 Top view of the stop-rotation washer;

[0020] Figure 5 The front view of the stop-rotation washer;

[0021] Figure 6 The front view of the stop-rotation washer;

[0022] The components include: 1. Gear shaft; 2. Snap ring; 3. Washer body; 31. Snap head; 32. Opening groove; 4. Oil-impregnated bearing; 5. Gearbox. Detailed Implementation

[0023] The specific embodiments of this utility model are described below to enable those skilled in the art to understand this utility model. However, it should be understood that this utility model is not limited to the scope of the specific embodiments. For those skilled in the art, as long as various changes are within the spirit and scope of this utility model as defined and determined by the appended claims, these changes are obvious. All utility model creations utilizing the concept of this utility model are within the scope of protection.

[0024] In the prior art, the metal washer has a flat annular structure, which causes the metal washer to rotate with the gear shaft 1 when the wiper motor is working. After a long period of operation, the reduction gearbox 5 of the wiper motor will be worn with pits by the rotating washer. In order to solve the problem that the washer on the existing wiper motor will rotate with the gear shaft 1, this application provides multiple clips 31 on the outer ring surface of the washer body 3 to be obliquely embedded into the slots on the end face of the reduction gearbox 5, thereby preventing the washer from rotating with the gear shaft 1, so that the reduction gearbox 5 and the washer will not wear each other, ensuring the stability of the gear shaft 1 and the lubrication performance of the oil-impregnated bearing 4, and achieving the technical effect of the car wiper system being able to operate stably for a long time.

[0025] This embodiment provides an anti-rotation washer, referring to reference 1 and... Figure 3 The system includes a washer body 3, which is an annular plate structure. The inner ring of the washer body 3 is fitted onto the gear shaft 1 of the gearbox 5 with a clearance. Multiple locking heads 31 are integrally and uniformly formed on the outer ring surface of the washer body 3. The free end of each locking head 31 is inclined downwards and embedded in a slot on the end face of the gearbox 5. In this embodiment, the inclination angle of each locking head 31 is 45° to 60°, preferably 45°.

[0026] refer to Figure 1 and Figure 2 A retaining ring 2 is provided on the top surface of the washer body 3. The retaining ring 2 is threaded onto the gear shaft 1 and is used to limit the position of the washer body 3. The retaining ring 2 can effectively prevent the washer from moving up and down along the gear shaft 1, ensuring that its position is fixed.

[0027] For details on the structure of Card Ring 2, please refer to Figure 2The retaining ring 2 is a conical plate. An integral ring plate is bent upwards at the large-diameter end of the retaining ring 2. The bottom of the ring plate, where it connects to the large-diameter end of the retaining ring 2, abuts against the top surface of the washer body 3. This shape of the retaining ring 2 not only enhances its overall strength but also provides better positioning, ensuring the positional stability of the washer body 3.

[0028] For the specific structure of washer body 3, please refer to Figure 3 Multiple slots 32 are evenly distributed across the end face of the washer body 3 near the outer ring surface. Each slot 32 corresponds one-to-one with a set of clamps 31. Each clamp 31 includes pointed plates positioned on both sides of the corresponding slot 32. Each slot on the end face of the gearbox 5 also includes two recessed grooves. The two pointed plates correspond one-to-one with the two recessed grooves, and are respectively embedded into the two recessed grooves on the end face of the gearbox 5. This allows the slot 32 to be engaged with the rib between the two recessed grooves, thereby improving the grip and stability of the clamps 31 and better preventing the washer from rotating with the gear shaft 1.

[0029] In this embodiment, the opening groove 32 can be U-shaped, as shown in the reference. Figure 3 and Figure 4 The opening slot 32 can also be an M-type slot, see reference. Figure 5 and Figure 6 The preferred design is an M-shaped groove.

[0030] To avoid stress concentration and increase the strength and durability of the clamping head 31, each pointed plate is a triangular plate structure, and the bottom surface of each pointed plate is connected to the outer ring surface of the washer body 3 by an arc transition. In addition, to reduce the processing cost of the washer body 3, the two mutually distant sides of the two pointed plates in each clamping head 31 are arc surfaces with the same diameter as the outer ring surface of the washer body 3.

[0031] To improve the locking effect of the card head 31 within the card slot, refer to Figure 4 In each clip 31, the two adjacent sides of the two pointed plates gradually approach each other along the radial direction of the washer body 3.

[0032] As a further embodiment, the washer body 3 is made of a material with high wear resistance, such as cemented carbide, high-speed steel, chromium steel, zirconium oxide, or silicon nitride. The high wear resistance of the material ensures that the inner ring diameter of the washer body 3 will not be excessively worn by the gear shaft 1 during long-term operation, while reducing metal powder and ensuring the lubrication of the oil-impregnated bearing 4 located on the gear shaft 1.

[0033] Although the specific embodiments of the utility model have been described in detail with reference to the accompanying drawings, this should not be construed as limiting the scope of protection of this patent. Various modifications and variations that can be made by those skilled in the art without inventive effort within the scope described in the claims still fall within the scope of protection of this patent.

Claims

1. An anti-rotation washer, characterized in that, The gasket body (3) is a ring-shaped plate structure. The inner ring of the gasket body (3) is used for clearance fit on the gear shaft (1) of the gearbox (5). The outer ring surface of the gasket body (3) is integrally formed with multiple clips (31). The free end of each clip (31) is inclined downward and used to be embedded in the slot on the end face of the gearbox (5).

2. The anti-rotation washer according to claim 1, characterized in that, Multiple clips (31) are evenly distributed on the outer ring surface of the washer body (3).

3. The anti-rotation washer according to claim 1, characterized in that, The washer body (3) has a plurality of slots (32) evenly distributed on the end face near the outer ring surface. The plurality of slots (32) correspond one-to-one with the plurality of clips (31). Each clip (31) includes a pointed plate respectively disposed on both sides of the corresponding slot (32).

4. The anti-rotation washer according to claim 3, characterized in that, Each of the pointed plates is a triangular plate structure, and the bottom surface of each pointed plate is connected to the outer ring surface of the washer body (3) by a circular arc transition.

5. The anti-rotation washer according to claim 4, characterized in that, The two mutually distant sides of the two tips in each of the card heads (31) are arc surfaces with the same diameter as the outer ring surface of the washer body (3).

6. The anti-rotation washer according to claim 4, characterized in that, The two adjacent sides of the two tips in each of the card heads (31) gradually approach each other in the radial direction of the washer body (3).

7. The anti-rotation washer according to claim 3, characterized in that, The tilt angle of each of the pointed plates is 45° to 60°.

8. The anti-rotation washer according to claim 1, characterized in that, A retaining ring (2) is provided on the top surface of the washer body (3). The retaining ring (2) is used to be threaded onto the gear shaft (1) and to limit the position of the washer body (3).

9. The anti-rotation washer according to claim 8, characterized in that, The retaining ring (2) is a conical plate. The large diameter end of the retaining ring (2) is integrally bent upward to form a ring plate. The bottom of the ring plate and the bent connection point of the large diameter end of the retaining ring (2) abut against the top surface of the washer body (3).

Images