Removable anti-loosening nut

Abstract

The present invention discloses a detachable anti-loosening nut, which includes a nut, a washer and a gasket. An avoidance groove is opened on the washer, and the gasket is located below the washer. A spring sheet is provided on the gasket, and the spring sheet is located in the avoidance groove of the washer. The upper end of the spring sheet extends above the washer. The nut is located above the washer, and a ratchet corresponding to the upper end of the spring sheet is provided on the bottom surface of the nut. The advantage of the present invention is that while ensuring a good anti-loosening effect, the nut also has a detachable function, which facilitates the reuse of the detachable anti-loosening nut.

Description

Technical Field

[0001] The present invention relates to the technical field of nuts, and more particularly to the technical field of anti-loosening nuts. Background Art

[0002] An anti-loosening nut is a nut with an anti-loosening function. The anti-loosening methods used by anti-loosening nuts in the existing technology mainly include mechanical anti-loosening, riveting anti-loosening, friction anti-loosening and structural anti-loosening. Among them, friction anti-loosening is the most widely used anti-loosening method. This method generates a positive pressure between the locking nut pairs that does not change with external force, so as to generate a friction force that can prevent the locking nut pairs from rotating relative to each other. This positive pressure can be achieved by axially or simultaneously pressing the locking nut pairs in two directions, such as using anti-slip washers. The currently common anti-slip washers generally improve the anti-slip effect by setting anti-slip teeth on their surface. Therefore, the anti-loosening effect is not very ideal and cannot be adapted to occasions with high requirements for anti-loosening performance. Although some anti-loosening nuts with anti-dismantling structures can achieve good anti-loosening effects, these anti-loosening nuts cannot be disassembled after installation, or are very difficult to disassemble, which is not convenient for reuse of anti-loosening nuts. Summary of the Invention

[0003] The purpose of the present invention is to solve the above-mentioned deficiencies and provide a detachable anti-loosening nut which has a good anti-loosening effect, is very suitable for use in occasions with high requirements for anti-loosening performance, and can be disassembled.

[0004] The technical solutions adopted by the present invention to solve the above technical problems are as follows:

[0005] A detachable anti-loosening nut includes a nut, a washer and a gasket. An avoidance groove is provided on the washer, and the gasket is located below the washer. A spring sheet is provided on the gasket, and the spring sheet is located in the avoidance groove of the washer. The upper end of the spring sheet extends above the washer. The nut is located above the washer, and a ratchet corresponding to the upper end of the spring sheet is provided on the bottom surface of the nut.

[0006] The gasket is provided with notches uniformly distributed along the circumference, and the spring pieces are respectively located at the notches of the gasket. The spring pieces are curled upward, and one side wall of the gasket avoidance groove is set as an inclined surface, and the spring pieces are attached to the inclined surface of the avoidance groove.

[0007] A groove corresponding to the elastic sheet is provided on the inclined surface of the washer avoidance groove.

[0008] Locking teeth are provided on the bottom surface of the washer and pass through the notches of the gasket respectively.

[0009] The avoidance grooves on the gasket are evenly distributed along the circumferential direction.

[0010] The nut is a flange nut, and the ratchet teeth on the nut are evenly distributed along the circumference.

[0011] The beneficial effects that can be achieved by adopting the above-mentioned technical solutions of the present invention are as follows: when using the detachable anti-loosening nut of the present invention, the washer and the gasket are first placed on the bolt to be connected with the nut, and then the nut is screwed on the bolt, and the washer and the gasket are pressed by the nut, so that the locking teeth on the washer are tightly pressed and embedded in the workpiece to be tightened, and the washer and the gasket are locked to the workpiece. When the nut is tightened, the upper end of the spring is stuck between adjacent ratchet teeth or abuts against the ratchet teeth. At this time, under the limiting action of the upper end of the spring and the ratchet teeth, the nut can only rotate in one direction, that is, the nut can only rotate in the direction of tightening it, thereby preventing the nut from loosening, achieving a good anti-loosening effect, and is very suitable for use in occasions with high requirements for anti-loosening performance. When the nut needs to be removed from the bolt, first take a claw-shaped tool and insert the claws of the claw-shaped tool into the grooves of the washer respectively, then move the claw-shaped tool to push the spring piece downward at the same time through the claws of the claw-shaped tool, push the upper end of the spring piece into the avoidance groove, so that the upper end of the spring piece is withdrawn from the ratchet teeth of the nut, and then the nut can be loosened and removed from the bolt. While ensuring a good anti-loosening effect, the nut also has a detachable function, which is convenient for the reusable detachable anti-loosening nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a structural schematic diagram of the present invention;

[0013] Figure 2 for Figure 1 Schematic diagram of the structure of the middle washer and gasket;

[0014] Figure 3 for Figure 2 A top view of

[0015] Figure 4 for Figure 1 Schematic diagram of the structure of the middle washer;

[0016] Figure 5 for Figure 4 Bottom view of

[0017] Figure 6 for Figure 2 Schematic diagram of the structure of the middle gasket;

[0018] Figure 7 for Figure 6 A top view of

[0019] Figure 8 for Figure 1 Bottom view of the middle nut. DETAILED DESCRIPTION

[0020] Depend on Figures 1 to 8As shown, a detachable anti-loosening nut comprises a nut 1, a washer 2 and a gasket 3. A circumferentially uniformly distributed avoidance groove 4 is provided on the gasket 2. A side wall of the washer 2 avoidance groove 4 is provided with an inclined surface 5. The gasket 3 is located below the gasket 2. Notches 10 uniformly distributed along the circumference are provided on the gasket 3. An upwardly curled spring piece 6 is provided at the notch 10 of the gasket 3. The spring piece 6 is respectively located in the avoidance groove 4 of the gasket 2, and the spring piece 6 is abutted against the avoidance groove 4. On the inclined surface 5 of the groove 4, the upper end of the spring piece 6 extends to above the washer 2, and the nut 1 is located above the washer 2. The nut 1 is a flange nut. A ratchet 7 corresponding to the upper end of the spring piece 6 is provided on the bottom surface of the nut 1. The ratchet teeth 7 are evenly distributed along the circumference, and a groove 8 corresponding to the spring piece 6 is provided on the inclined surface 5 of the groove 4 of the washer 2. Locking teeth 9 are provided on the bottom surface of the washer 2, and the locking teeth 9 pass through the notches 10 of the gasket 3 respectively.

[0021] When the detachable anti-loosening nut of the present invention is used, the washer 2 and the gasket 3 are first placed on the bolt to be connected with the nut 1, and then the nut 1 is screwed on the bolt, and the washer 2 and the gasket 3 are pressed tightly by the nut 1, so that the locking teeth 9 on the washer 2 are tightly pressed and embedded on the workpiece to be fastened, and the washer 2 and the gasket 3 are locked to the workpiece. When the nut 1 is tightened, the upper end of the spring piece 6 is stuck between the adjacent ratchet teeth 7 or abuts on the ratchet teeth 7. At this time, under the limiting action of the upper end of the spring piece 6 and the ratchet teeth 7, the nut 1 can only move toward Figure 3 The nut 1 can only be rotated in the counterclockwise direction and cannot be rotated in the clockwise direction, that is, the nut 1 can only be rotated in the direction of tightening it, thereby preventing the nut 1 from loosening. When the nut 1 needs to be removed from the bolt, first take a claw-shaped tool, insert the claws of the claw-shaped tool into the grooves 8 of the washer 2, and then turn the claw-shaped tool in the direction of tightening it. Figure 1 The spring piece 6 is pushed downward by the claw of the claw-shaped tool at the same time, and the upper end of the spring piece 6 is pushed into the avoidance groove 4, so that the upper end of the spring piece 6 is withdrawn from the ratchet 7 of the nut 1, and then the nut 1 can be loosened and removed from the bolt.

Claims

1. Removable anti-loosening nut, characterized by: It includes a nut, a washer and a gasket, wherein an avoidance groove is provided on the washer, the gasket is located below the washer, a spring sheet is provided on the gasket, the spring sheet is located in the avoidance groove of the washer, the upper end of the spring sheet extends above the washer, the nut is located above the washer, a ratchet corresponding to the upper end of the spring sheet is provided on the bottom surface of the nut, notches uniformly distributed along the circumference are provided on the gasket, the spring sheets are respectively located at the notches of the gasket, the spring sheet is curled upward, a side wall of the washer avoidance groove is provided in an inclined surface, the spring sheet is abutted against the inclined surface of the avoidance groove, a groove corresponding to the spring sheet is provided on the inclined surface of the washer avoidance groove, and locking teeth are provided on the bottom surface of the gasket, the locking teeth respectively pass through the notches of the gasket.

2. The detachable anti-loosening nut according to claim 1, characterized in that: The avoidance grooves on the gasket are evenly distributed along the circumferential direction.

3. The detachable anti-loosening nut according to claim 1, characterized in that: The nut is a flange nut, and the ratchet teeth on the nut are evenly distributed along the circumference.

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