Anti-loosening fastener

Abstract

The utility model provides an anti-loose fastener, including bolt, the bolt is connected with main nut and vice nut on the thread, main nut is located vice nut downside, is equipped with anti -loose spare between main nut and vice nut, anti -loose spare embeds into the limit slot after the compression deformation. The utility model has the advantages of simple structure, prevents the nut from loosening, and the anti -loose effect is stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of fastening structures, and in particular to an anti-loosening fastener. Background Technology

[0002] Bolts and nuts are common fasteners widely used in industries such as machinery manufacturing. However, fasteners are prone to loosening after vibration and impact, especially in high-speed, high-pressure, and high-frequency vibration or impact scenarios.

[0003] Chinese patent CN222977209U, filed on April 22, 2025, discloses an anti-loosening nut assembly, including a bolt body and a nut. The bolt body includes a bolt head and a threaded rod connected to the bottom of the bolt head. A limiting groove is formed on the side of the threaded rod. An anti-loosening component is movably installed on the outside of the threaded rod. The nut is threadedly connected to the outside of the threaded rod. The anti-loosening component includes a collar sleeved on the outside of the threaded rod, and a protrusion engaged in the limiting groove is provided on the inner side of the collar. In use, the anti-loosening nut assembly is sleeved on the outside of the threaded rod by the collar, at which point the protrusion is engaged in the limiting groove. Then, the nut is threaded onto the outside of the threaded rod. By pushing the second fork upward with a finger, the limiting piece and the first fork bend outward. When the nut is screwed to the outside of the first fork, the deformation and recovery of the first fork applies a clamping force to tighten it against the outside of the nut, thereby preventing the nut from loosening due to self-rotation. The operation is simple, convenient, and practical.

[0004] In this technical solution, the elasticity of the limiting plate is mainly used to make the first branch fit against the nut to limit the nut. However, during use, the limiting plate, the first branch and the second branch are easily impacted. After the elasticity of the limiting plate changes, it can easily affect the limiting effect on the nut, so further improvements can be made. Utility Model Content

[0005] In order to solve the problems existing in the background art, this utility model proposes an anti-loosening fastener.

[0006] An anti-loosening fastener includes a bolt with a main nut and a secondary nut threadedly connected to it. The main nut is located below the secondary nut. A limiting groove is formed on the thread of the bolt. An anti-loosening element is provided between the main nut and the secondary nut. The anti-loosening element is embedded in the limiting groove after being deformed by pressure.

[0007] Based on the above, the limiting groove is parallel to the axis of the bolt, and the limiting groove array is formed on the thread of the bolt.

[0008] Based on the above, the depth of the limiting groove is less than the depth of the bolt thread.

[0009] Based on the above, a groove is provided on the top of the main nut, and the anti-loosening component is embedded in the groove after being deformed by pressure.

[0010] Based on the above, a spiral strip is provided inside the secondary nut, and the secondary nut is threadedly connected to the bolt through the spiral strip.

[0011] Based on the above, the bottom of the secondary nut is provided with a receiving groove, and two spacer blocks are fixed in an array in the receiving groove. The anti-loosening component is arc-shaped and inserted into the receiving groove, and the thickness of the anti-loosening component is greater than the depth of the receiving groove.

[0012] This utility model has substantial features and advancements compared to existing technologies. Specifically, this utility model uses the squeezing action of the auxiliary nut and the main nut on the anti-loosening component to deform the anti-loosening component and embed it into the limiting groove and recess, thereby inhibiting the movement of the main nut relative to the bolt and achieving the purpose of preventing loosening. Furthermore, the main nut and auxiliary nut shield the anti-loosening component from both sides to prevent it from being impacted, ensuring a stable anti-loosening effect. It has the advantages of simple structure, prevention of nut loosening, and stable and reliable anti-loosening effect. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0014] Figure 2 This is a structural schematic diagram of the bolt, main nut, and auxiliary nut of this utility model in their separated states.

[0015] Figure 3 This is a top-view three-dimensional structural diagram of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 100, bolt; 200, main nut; 300, secondary nut; 400, limiting groove; 500, anti-loosening component; 201, groove; 301, spiral strip; 302, receiving groove; 303, spacer block. Detailed Implementation

[0017] 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.

[0018] like Figures 1-3As shown, an anti-loosening fastener includes a bolt 100, with a main nut 200 and a secondary nut 300 threadedly connected to the bolt 100. The main nut 200 is located below the secondary nut 300, and is clamped to both sides of the fastener by the engagement of the bolt head with the main nut 200. A limiting groove 400 is formed on the thread of the bolt 100. The limiting groove 400 is V-shaped in plan view, parallel to the axis of the bolt 100, and is arranged in an array on the thread of the bolt 100. The depth of the limiting groove 400 is less than the depth of the bolt 100 thread. A groove 201 is formed on the top of the main nut 200.

[0019] An anti-loosening component 500 is provided between the main nut 200 and the auxiliary nut 300. The anti-loosening component 500 has the ability to be cut and deformed, and can be made of aluminum. By tightening the auxiliary nut 300, the distance between the auxiliary nut 300 and the main nut 200 is reduced, causing the auxiliary nut 300 to compress the anti-loosening component 500. After being deformed by pressure, the anti-loosening component 500 is embedded in the limiting groove 400 and the recess 201, thereby inhibiting the movement of the main nut 200 relative to the bolt 100.

[0020] In practice, the secondary nut 300 has a spiral strip 301 inside, which is spiral-shaped. The secondary nut 300 is threadedly connected to the bolt 100 through the spiral strip 301. The bottom of the secondary nut 300 has a receiving groove 302, within which two spacer blocks 303 are fixed in an array. Each spacer block 303 has an arc-shaped protrusion on its opposite side, which matches the spiral strip 301. When the secondary nut 300 is threadedly connected to the bolt 100, the arc-shaped protrusion on the spacer block 303 slides within the threads of the bolt 100. The anti-loosening component 500 is arc-shaped and inserted into the receiving groove 302, and the thickness of the anti-loosening component 500 is greater than the depth of the receiving groove 302.

[0021] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An anti-loosening fastener, characterized in that: The device includes a bolt (100), on which a main nut (200) and a secondary nut (300) are threadedly connected. The main nut (200) is located below the secondary nut (300). A limiting groove (400) is formed on the thread of the bolt (100). An anti-loosening component (500) is provided between the main nut (200) and the secondary nut (300). The anti-loosening component (500) is embedded in the limiting groove (400) after being deformed by pressure.

2. The anti-loosening fastener according to claim 1, characterized in that: The limiting groove (400) is parallel to the axis of the bolt (100), and the limiting groove (400) array is opened on the thread of the bolt (100).

3. The anti-loosening fastener according to claim 2, characterized in that: The depth of the limiting groove (400) is less than the depth of the bolt (100) thread.

4. The anti-loosening fastener according to claim 1, characterized in that: The main nut (200) has a groove (201) on its top, and the anti-loosening component (500) is embedded in the groove (201) after being deformed by pressure.

5. The anti-loosening fastener according to claim 1, characterized in that: The secondary nut (300) has a spiral bar (301) inside, and the secondary nut (300) is threadedly connected to the bolt (100) through the spiral bar (301).

6. The anti-loosening fastener according to claim 1, characterized in that: The bottom of the secondary nut (300) is provided with a receiving groove (302), and two spacer blocks (303) are fixed in an array in the receiving groove (302). The anti-loosening member (500) is arc-shaped and inserted into the receiving groove (302), and the thickness of the anti-loosening member (500) is greater than the depth of the receiving groove (302).

Images