Thread anti-retreating structure

Abstract

The utility model relates to an anti-retreating structure, in particular to a thread anti-retreating structure capable of preventing a connecting piece from loosening and even falling off due to vibration. The device comprises a main body and a cover, the main body is integrally located inside the device or connected outside the device and located at the pre-installation position of a connecting piece needing to be prevented from retreating, and methods such as later welding or integral forming during manufacturing can be adopted. The main body is provided with a step surface and a threaded hole connected with the step surface, and inner ratchets are arranged on the inner wall of the step surface. The cover is made of an elastic deformation material and comprises an external thread part matched with the threaded hole and an end part matched with the step surface, outer ratchets meshed with the inner ratchets are arranged on the outer circumferential surface of the end part, and the inner ratchets and the outer ratchets jointly act to achieve the anti-retreating effect. A tightening groove and a through machining hole are formed in the middle of the end face of the cover. The anti-loosening and anti-retreating structure has the advantages that due to the design of the one-way teeth, the anti-loosening and anti-retreating performance of the structure can be guaranteed when the structure faces vibration of various strengths.

Description

Technical Field

[0001] The utility model relates to an anti-loosening structure, specifically a threaded anti-loosening structure for preventing a connecting piece from loosening or even falling off due to vibration. Background Art

[0002] During mechanical production operations, vibration often occurs, and the vibration will cause the connections between parts to loosen or even fall off, thus having varying degrees of impact on the mechanical life, production efficiency, and operation safety. Therefore, many machines are specially provided with anti-loosening and anti-withdrawal structures to minimize the occurrence of the above situations.

[0003] For example, in the rail transit industry, when a train is running, due to the strong vibration of the rails and their supporting rail-switching facilities, it is very difficult for the connecting pieces on the equipment to maintain a fixed position. Over time, phenomena such as part misalignment and control failure may occur. However, the traditional anti-withdrawal structure has insufficient anti-withdrawal performance in the face of such application scenarios, and there is still a risk of the connecting piece falling off. Therefore, it is necessary to design a structure that can still ensure anti-loosening and anti-withdrawal performance in the face of high-intensity vibration. Summary of the Invention

[0004] The technical problem to be solved by the utility model is to provide a threaded anti-withdrawal structure applicable to a variety of products, which can prevent the connecting piece from loosening or even falling off due to vibrations of various intensities.

[0005] To solve the above technical problem, the threaded anti-withdrawal structure of the utility model includes a main body and a lid. The main body is provided with a stepped surface and a threaded hole connected to the stepped surface. The inner wall of the stepped surface is provided with inner ratchet teeth. The lid includes an external thread portion matching the threaded hole and an end portion matching the stepped surface. The outer circumferential surface of the end portion is provided with outer ratchet teeth meshing with the inner ratchet teeth. The lid is made of an elastically deformable material. When the outer ratchet teeth are tightened, they deform, so as to cooperate with the inner ratchet teeth to achieve an anti-withdrawal effect.

[0006] A tightening groove is formed in the middle of the end face of the lid.

[0007] A through processing hole is formed in the middle of the lid.

[0008] The material of the lid is preferably nylon.

[0009] The advantages of the utility model are that the design of the one-way teeth enables the structure to ensure anti-loosening and anti-withdrawal performance in the face of vibrations of various intensities. Brief Description of the Drawings

[0010] Figure 1 is a perspective view of the utility model;

[0011] Figure 2 is a perspective view of the main body of the utility model;

[0012] Figure 3 is the three-dimensional view of the lid of the present utility model Figure 1 ;

[0013] Figure 4 is the three-dimensional view of the lid of the present utility model Figure 2 ;

[0014] Figure 5 is the sectional view of the embodiment of the present utility model;

[0015] Figure 6 is the three-dimensional view of the embodiment of the present utility model. Specific embodiments

[0016] The following further elaborates in detail on the anti-loosening structure of the threads of the present utility model in conjunction with the accompanying drawings and specific embodiments.

[0017] As shown in Figure 1 、 2 、3, the anti-loosening structure of the threads of the present utility model includes a main body 1 and a lid 2. The main body 1 is entirely inside the device or connected to the outside of the device, located at the pre-installation position of the connector that needs anti-loosening, and can be achieved by methods such as post-welding or integral molding during manufacturing. The main body 1 is provided with a stepped surface 4 and a threaded hole connected to the stepped surface 4. The inner wall of the stepped surface 4 is provided with inner ratchet teeth 5. The lid 2 is made of an elastically deformable material, preferably nylon, and includes an external threaded portion matching the threaded hole 3 and an end portion 6 matching the stepped surface 4. The outer circumferential surface of the end portion 6 is provided with outer ratchet teeth 7 meshing with the inner ratchet teeth 5. The outer ratchet teeth 7 deform when tightened, thereby cooperating with the inner ratchet teeth 5 to achieve the anti-loosening effect. In the middle of the end face of the lid 2, there is a tightening groove 8 for facilitating the tightening of the lid 2 in place and a through processing hole 9.

[0018] As shown in the embodiments of Figure 4 、 5 , during actual installation, first, the moving contact block fitting that needs anti-loosening protection is assembled into the device through the threaded hole 3. After confirmation, align the anti-loosening concave teeth 5 and the anti-loosening convex teeth 7, place the lid 2 into the groove 4 on the main body 1, and then use a tool to engage the tightening groove 8 and rotate. Utilize the deformation of the elastic material and the characteristics of the one-way teeth to screw the lid into place and prevent it from retracting, achieving the anti-loosening effect.

[0019] Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above examples. Changes, modifications, additions, or substitutions made by those skilled in the art within the scope of the essence of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A thread anti-loosening structure, characterized in that: It includes a main body (1) and a lid (2). The main body (1) is provided with a stepped surface (4) and a threaded hole (3) connected to the stepped surface (4). An internal ratchet (5) is provided on the inner wall of the stepped surface (4). The lid (2) includes an external thread portion matching the threaded hole (3) and an end portion (6) matching the stepped surface (4). An external ratchet (7) meshing with the internal ratchet (5) is provided on the outer circumferential surface of the end portion (6). The lid (2) is made of an elastically deformable material. When the external ratchet (7) is tightened, it deforms, so as to cooperate with the internal ratchet (5) to achieve an anti-loosening effect.

2. The thread anti-loosening structure according to claim 1, characterized in that: A tightening groove (8) is provided in the middle of the end face of the lid (2).

3. The thread anti-loosening structure according to claim 1, characterized in that: A through processing hole (9) is provided in the middle of the lid (2).

4. The thread anti-loosening structure according to claim 1, wherein: The material of the lid (2) is preferably nylon.

Images