Fastening screw with retaining structure

Abstract

The utility model discloses a fastening screw with a retaining structure, and particularly relates to the field of fastening screws, the fastening screw comprises a screw body, a conical column is fixedly arranged on one side of the screw body, a first connecting layer is fixedly arranged on the outer wall of the screw body, the first connecting layer is made of polyformaldehyde materials, and the second connecting layer is made of polyformaldehyde materials. A second connecting layer is fixedly arranged on one side of the first connecting layer, a third connecting layer is fixedly adhered to one side of the second connecting layer, the second connecting layer is made of a polyamide material, the third connecting layer is made of a polycarbonate material, a thread groove is formed in the outer wall of the screw body, and the thread groove is arranged in a double-thread mode. A connecting hole is formed in the screw body. The first connecting layer, the second connecting layer and the third connecting layer are sequentially arranged on the outer wall of the screw body, so that the roughness of the thread surface is controlled, the friction force is increased, the self-locking effect is enhanced, the fastening effect is improved, and the practicability of the device is improved to a certain extent.

Description

Technical Field

[0001] The utility model relates to the field of fastening screws, and more specifically, to a fastening screw with an anti-loosening structure. Background Art

[0002] A screw is a tool that utilizes the physical and mathematical principles of the inclined plane circular rotation and friction of an object to gradually fasten machine parts. Screws are indispensable industrial necessities in daily life.

[0003] After retrieval, the existing patent (Publication No.: CN 219733856 U) discloses a fastening screw with an anti-loosening structure, including a fixed nail body. A nail cap is provided at the rear end of the fixed nail body. An insertion hole is provided on the nail cap, and an insertion strip is connected in the insertion hole. A convex structure is formed on the surface of the front end of the fixed nail body facing the insertion strip, and a concave structure is formed on the surface of the front end of the corresponding insertion strip facing the fixed nail body. A anti-loosening groove is provided on the surface of the fixed nail body facing the insertion strip. There are two anti-loosening grooves, and the two anti-loosening grooves are arranged at intervals front and back. An anti-loosening protrusion is provided on the surface of the insertion strip facing the fixed nail body, and the anti-loosening protrusion is connected to the anti-loosening groove located at the rear side. In its initial state, the insertion strip is connected in the insertion hole, and the anti-loosening protrusion on the insertion strip is connected to the anti-loosening groove located at the rear side, which can limit the insertion strip from being pulled out of the insertion hole outward. After the insertion strip is knocked in, the insertion strip moves forward, and the anti-loosening protrusion on the insertion strip is connected to the anti-loosening groove located at the front side, so that the insertion strip can be restricted from moving backward, avoiding the inserted strip that has undergone expansion deformation from moving backward to recover the deformation.

[0004] The existing fastening screws will become loose after long-term use, affecting their fastening effect and resulting in certain limitations in their use. At the same time, the cited patent documents above do not propose relevant solutions to solve the above problems.

[0005] Therefore, a fastening screw with an anti-loosening structure is proposed for the above problems. Content of the Utility Model

[0006] In order to overcome the above defects of the prior art, an embodiment of the utility model provides a fastening screw with an anti-loosening structure to solve the problems raised in the above background art.

[0007] To achieve the above purpose, the utility model provides the following technical solution: A fastening screw with an anti-loosening structure includes a screw body. A conical column is fixedly arranged on one side of the screw body, and a first connection layer is fixedly arranged on the outer wall of the screw body. The first connection layer is made of polyoxymethylene material. A second connection layer is fixedly arranged on one side of the first connection layer, and a third connection layer is fixedly adhered to one side of the second connection layer. The second connection layer is made of polyamide material, and the third connection layer is made of polycarbonate material.

[0008] Preferably, a thread groove is provided on the outer wall of the screw body, and the thread groove is provided with double threads.

[0009] Preferably, a connection hole is provided inside the screw body, a through hole is provided on one side of the connection hole, and a connection seat is fixedly provided on one side of the screw body, and a limit hole is provided inside the connection seat.

[0010] Preferably, a plug rod is snap-fitted inside the screw body, and the plug rod penetrates through the limit hole and extends into the connection hole.

[0011] Preferably, a plurality of limit blocks are fixedly connected to one side of the plug rod at equal intervals, and a limit groove is provided on one side inside the screw body, and the limit groove is in fit connection with the limit blocks.

[0012] Preferably, a fixing seat is fixedly provided on one side of the plug rod, a connection groove is provided on one side of the fixing seat, and the connection groove is in snap-fitting connection with the connection seat.

[0013] The technical effects and advantages of the present utility model:

[0014] Compared with the prior art, for the fastening screw with an anti-back-off structure, by sequentially providing a first connection layer, a second connection layer and a third connection layer on the outer wall of the screw body, the roughness of the thread surface is controlled, the friction force is increased, and thus the self-locking effect is enhanced, so that the fastening effect is improved, and the practicability of the device is improved to a certain extent. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0016] Figure 2 It is a schematic diagram of the structure at the position of the connection hole of the present utility model.

[0017] Figure 3 It is a schematic diagram of the structure at the position of the limit block of the present utility model.

[0018] Figure 4 It is a schematic diagram of the structure at the position of the connection layer of the present utility model.

[0019] The reference numerals are: 1, screw body; 2, taper column; 3, connection seat; 4, connection hole; 5, through hole; 6, limit hole; 7, plug rod; 8, limit block; 9, limit groove; 10, fixing seat; 11, connection groove; 12, first connection layer; 13, second connection layer; 14, third connection layer; 15, thread groove. Detailed Description of the Invention

[0020] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0021] Embodiment 1

[0022] As shown in the attachment Figures 1 to 4 A fastening screw with an anti-back structure includes a screw body 1. A tapered column 2 is fixedly arranged on one side of the screw body 1. A first connection layer 12 is fixedly arranged on the outer wall of the screw body 1. The first connection layer 12 is made of polyoxymethylene material. A second connection layer 13 is fixedly arranged on one side of the first connection layer 12. A third connection layer 14 is fixedly adhered to one side of the second connection layer 13. The second connection layer 13 is made of polyamide material, and the third connection layer 14 is made of polycarbonate material.

[0023] Among them: By providing the first connection layer 12, the second connection layer 13 and the third connection layer 14, the roughness of the threaded surface on the outer wall of the screw body 1 can be controlled, the friction force is increased to enhance the self-locking effect, so that the anti-back effect is improved, and the practicability of the device is improved to a certain extent.

[0024] Embodiment 2

[0025] On the basis of Embodiment 1, the solution in Embodiment 1 will be further refined and introduced in combination with the following specific working methods, as Figures 1 to 4 shown, for details see the following description:

[0026] As a preferred implementation method, a threaded groove 15 is opened on the outer wall of the screw body 1, and the threaded groove 15 is provided with double threads; further, by providing the threaded groove 15 with double threads, a larger contact area can be provided during fastening, thereby enhancing the self-locking ability and making the practicability of the device stronger.

[0027] As a preferred implementation method, a connection hole 4 is opened inside the screw body 1. A through hole 5 is opened on one side of the connection hole 4. A connection seat 3 is fixedly arranged on one side of the screw body 1. A limiting hole 6 is opened inside the connection seat 3; further, by providing the limiting hole 6, it is convenient for the inserting rod 7 to penetrate through it, which is convenient for limiting the connection seat 3, thereby improving the stability of its connection with the fixed seat 10 and making the use range of the device wider.

[0028] As a preferred embodiment, a plug rod 7 is engaged and connected inside the screw body 1, and the plug rod 7 penetrates through the limiting hole 6 and extends into the connection hole 4; further, by providing the connection hole 4, it is convenient to limit the plug rod 7, making the device more convenient to use.

[0029] As a preferred embodiment, a limiting block 8 is fixedly connected at equal intervals on one side of the plug rod 7, and a limiting groove 9 is opened on one side inside the screw body 1, and the limiting groove 9 is in fitting connection with the limiting block 8; further, by providing the limiting block 8, it is possible to prevent the plug rod 7 from slipping out of the connection hole 4, avoiding the expanded and deformed plug rod 7 from moving backward to restore the deformation, thereby improving the practicability of the device to a certain extent.

[0030] As a preferred embodiment, a fixing seat 10 is fixedly arranged on one side of the plug rod 7, a connection groove 11 is opened on one side of the fixing seat 10, and the connection groove 11 is in engaging connection with the connection seat 3; further, by providing the connection groove 11 and engaging the connection groove 11 with the connection seat 3, the connection stability is improved to a certain extent, enhancing the practicability of the device.

[0031] The working process of the present utility model is as follows:

[0032] When in use, first, a first connection layer 12, a second connection layer 13, and a third connection layer 14 are arranged on one side of the outer wall of the screw body 1, and the three are made of polyoxymethylene, polyamide, and polycarbonate materials in sequence, so as to control the roughness of the threaded surface of the outer wall of the screw body 1, increase the friction force to enhance the self-locking effect, improve the anti-back-off effect, and improve the practicability of the device to a certain extent. Secondly, a connection seat 3 is arranged at one end of the screw body 1, a limiting hole 6 is opened on one side of the connection seat 3, the plug rod 7 penetrates through the limiting hole 6 and extends into the connection hole 4 inside the screw body 1. At the same time, a limiting groove 9 is opened inside the screw body 1, and a limiting block 8 is arranged at equal intervals on one side of the plug rod 7, so as to prevent the plug rod 7 from slipping out of the connection hole 4, avoiding the expanded and deformed plug rod 7 from moving backward to restore the deformation, enhancing the practicability of the device. In addition, a thread groove 15 is arranged on the outer wall of the screw body 1, and the thread groove 15 is provided with double threads, which can provide a larger contact area during tightening, thereby enhancing the self-locking ability and making the device have a wider range of use. Finally, a connection groove 11 is opened inside the fixing seat 10 on one side of the plug rod 7, and the connection groove 11 is in engaging connection with the connection seat 3, thereby improving the connection stability to a certain extent and enhancing the practicability of the device.

[0033] Finally: The above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A fastening screw with an anti-back-off structure, comprising a screw body (1), characterized in that; One side of the screw body (1) is fixedly provided with a tapered column (2), and a first connection layer (12) is fixedly arranged on the outer wall of the screw body (1). The first connection layer (12) is made of polyoxymethylene material. A second connection layer (13) is fixedly arranged on one side of the first connection layer (12). A third connection layer (14) is fixedly adhered to one side of the second connection layer (13). The second connection layer (13) is made of polyamide material, and the third connection layer (14) is made of polycarbonate material.

2. The fastening screw with a backstop structure according to claim 1, characterized in that: Thread grooves (15) are formed in the outer wall of the screw body (1), and the thread grooves (15) are arranged in a double-thread manner.

3. The fastening screw with a backstop structure according to claim 1, characterized in that: A connection hole (4) is formed inside the screw body (1). A through hole (5) is formed on one side of the connection hole (4). A connection seat (3) is fixedly arranged on one side of the screw body (1). A limit hole (6) is formed inside the connection seat (3).

4. A fastening screw with an anti-back-off structure according to claim 1, characterized in that: A plug rod (7) is snap-connected inside the screw body (1). The plug rod (7) penetrates through the limit hole (6) and extends into the connection hole (4).

5. The fastening screw with a backstop structure according to claim 4, characterized in that: A plurality of limit blocks (8) are fixedly connected to one side of the plug rod (7) at equal intervals. A limit groove (9) is formed on one side inside the screw body (1). The limit groove (9) is in fit connection with the limit blocks (8).

6. The fastening screw with a backstop structure according to claim 4, characterized in that: A fixed seat (10) is fixedly arranged on one side of the plug rod (7). A connection groove (11) is formed on one side of the fixed seat (10). The connection groove (11) is in snap connection with the connection seat (3).

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