Anti-falling limiting type self-tapping screw
By setting a limiting unit on the self-tapping screw, including a positioning ring, a limiting ring, and a limiting block, the problem of loosening and falling off the self-tapping screw due to vibration is solved, and a more stable connection is achieved.
Patent Information
- Application Number
- CN202423165279.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-21
- Publication Date
- 2025-12-09
- Estimated Expiration
- 2034-12-21
AI Technical Summary
Self-tapping screws are prone to reverse rotation due to vibration during long-term use, leading to loosening and falling off.
A self-tapping screw with anti-loosening and limiting design is designed. By setting a limiting unit at the end of the screw body, including a positioning ring and a limiting ring, a limiting block and a limiting pin, the screw is prevented from rotating in the opposite direction by the cooperation of the limiting groove and the anti-loosening groove.
This effectively prevents screws from rotating in the opposite direction on the connector, preventing loosening and falling off, and improving connection stability.
Smart Images
Figure CN223648265U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of self-tapping screw technology, specifically to an anti-loosening limiting self-tapping screw. Background Technology
[0002] Self-tapping screws are threaded fasteners that automatically tap a mating female thread into a pre-drilled hole in a metal or non-metal material. They are often used to connect thin metal plates (steel plates, saw blades, etc.). Because the threaded surface of a self-tapping screw has high hardness, it can tap an internal thread into the threaded pilot hole of the connected parts, thus forming a connection.
[0003] Self-tapping screws achieve a stable connection by tightly fitting the outer spiral with the connected part. During long-term use, when the connected part vibrates, the self-tapping screw will also vibrate, which may cause the self-tapping screw to rotate in the opposite direction. This may cause the self-tapping screw to loosen or fall off the connected part. Therefore, this application proposes an anti-loosening limiting self-tapping screw. Utility Model Content
[0004] To address the shortcomings of existing technologies, this utility model provides an anti-loosening limiting self-tapping screw. This solves the problem that while self-tapping screws achieve stable connection by tightly fitting the outer spiral with the connected component, during long-term use, vibration of the connected component can cause the self-tapping screw to vibrate as well, potentially leading to reverse rotation and loosening or detachment of the self-tapping screw from the connected component.
[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: an anti-loosening limiting self-tapping screw, comprising a screw body, wherein a limiting unit is provided at the end of the screw body;
[0006] The limiting unit includes:
[0007] A positioning ring is movably sleeved on the outside of the end of the screw body, and a through limiting groove is provided on the positioning ring.
[0008] A limiting ring is rotatably connected to the end of the screw body, and a limiting block is fixedly connected to the side of the limiting ring. The limiting block is movably inserted into the limiting groove, and a limiting pin is fixedly installed at the end of the limiting block.
[0009] Preferably, the screw body includes a helical portion and an end, which are integrally formed.
[0010] Preferably, both the positioning ring and the limiting ring are movably sleeved on the outer side of the screw body end, and the limiting ring is rotatably connected to the end head.
[0011] Preferably, an anti-detachment groove is provided on the side of the end near the limiting ring, and an anti-detachment ring is installed on the side of the limiting ring near the end, and the anti-detachment ring fits into the anti-detachment groove.
[0012] Preferably, multiple limiting grooves are provided, and the multiple limiting grooves are arranged in a circular array on the positioning ring.
[0013] Preferably, the cross-sections of both the anti-detachment groove and the anti-detachment ring are trapezoidal.
[0014] This utility model discloses an anti-loosening limiting self-tapping screw, which has the following beneficial effects: Before use, the positioning ring and the limiting ring are sleeved on the outer side of the screw body end, and the limiting block on the side of the limiting ring is movably inserted into the limiting groove on the positioning ring. At this time, when the screw body is rotated, the screw body is screwed into the connecting part until the positioning ring is in contact with the outer side of the connecting part. Then, during the continued rotation of the screw body, the end of the screw body squeezes the limiting ring and moves towards the positioning ring, and the limiting pin at the end of the limiting block is inserted into the connecting part, which can limit the screw body and prevent the screw body from rotating in the opposite direction and falling off. Attached Figure Description
[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;
[0017] Figure 2 This is a schematic diagram of the screw body of this utility model;
[0018] Figure 3 This is a schematic diagram of the positioning ring of this utility model;
[0019] Figure 4 This is a schematic diagram of the limiting ring of this utility model.
[0020] In the diagram: 1. Screw body; 11. Spiral part; 12. End; 121. Anti-loosening groove; 2. Limiting unit; 21. Positioning ring; 211. Limiting groove; 22. Limiting ring; 221. Limiting block; 222. Limiting pin; 223. Anti-loosening ring. Detailed Implementation
[0021] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0022] This application provides an anti-loosening limiting self-tapping screw, which solves the problem that self-tapping screws achieve stable connection by tightly fitting the outer spiral with the connected part. During long-term use, when the connected part vibrates, the self-tapping screw will also vibrate, which may cause the self-tapping screw to rotate in the opposite direction, potentially causing the self-tapping screw to loosen or fall off the connected part. Positioning ring 21 and limiting ring 22 are fitted onto the outer side of the end of screw body 1, and the limiting block 221 on the side of limiting ring 22 is movably inserted into the limiting groove 211 on positioning ring 21. When screw body 1 is rotated, screw body 1 is screwed into connecting component until positioning ring 21 is in contact with the outer side of connecting component. Then, as screw body 1 is rotated, the end of screw body 1 is pressed against limiting ring 22 and moves towards positioning ring 21, and the limiting pin 222 at the end of limiting block 221 is inserted into connecting component, which can limit screw body 1 and prevent screw body 1 from rotating in the opposite direction and falling off.
[0023] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.
[0024] This utility model discloses an anti-loosening limiting self-tapping screw.
[0025] According to the appendix Figure 1-4 As shown, it includes a screw body 1, and a limit unit 2 is provided at the end of the screw body 1;
[0026] Limiting unit 2 includes:
[0027] The positioning ring 21 is movably sleeved on the outer side of the end of the screw body 1, and the positioning ring 21 has a through limiting groove 211.
[0028] The limiting ring 22 is rotatably connected to the end of the screw body 1, and the side of the limiting ring 22 is fixedly connected to the limiting block 221. The limiting block 221 is movably inserted into the limiting groove 211, and the end of the limiting block 221 is fixedly installed with the limiting pin 222.
[0029] Before use, the positioning ring 21 and the limiting ring 22 are fitted onto the outer side of the end of the screw body 1, and the limiting block 221 on the side of the limiting ring 22 is movably inserted into the limiting groove 211 on the positioning ring 21. When the screw body 1 is rotated, the screw body 1 is screwed into the connecting component until the positioning ring 21 is in contact with the outer side of the connecting component. Then, as the screw body 1 is rotated, the end of the screw body 1 is pressed against the limiting ring 22 and moves towards the positioning ring 21, and the limiting pin 222 at the end of the limiting block 221 is inserted into the connecting component, which can limit the screw body 1 and prevent the screw body 1 from rotating in the opposite direction and falling off.
[0030] Furthermore, the screw body 1 includes a helical portion 11 and an end 12, which are integrally formed. The outer side of the helical portion 11 is an external helix. When the helical portion 11 rotates toward the connecting component, the external helix on the outer side of the helical portion 11 can tap an internal thread in the threaded bottom hole of the connecting component, thereby forming a connection with the connecting component.
[0031] Furthermore, both the positioning ring 21 and the limiting ring 22 are movably sleeved on the outer side of the end of the screw body 1, and the limiting ring 22 is rotatably connected to the end head 12.
[0032] Because the limiting ring 22 is rotatably connected to the end 12, and the limiting block 221 on the side of the limiting ring 22 is movably inserted into the limiting groove 211 on the positioning ring 21, when the end 12 rotates and squeezes the limiting ring 22, the limiting pin 222 at the end of the limiting block 221 is driven into the connecting component, so the limiting ring 22 cannot rotate until the limiting ring 22 is in contact with the positioning ring 21.
[0033] Specifically disclosed, an anti-detachment groove 121 is provided on the side of the end 12 near the limiting ring 22, and an anti-detachment ring 223 is installed on the side of the limiting ring 22 near the end 12, and the anti-detachment ring 223 fits into the anti-detachment groove 121.
[0034] With the anti-detachment groove 121 and anti-detachment ring 223, when the end 12 is rotated, the end 12 can rotate relative to the limiting ring 22, and the limiting ring 22 and the end 12 will not separate.
[0035] Furthermore, multiple limiting grooves 211 are provided, and the multiple limiting grooves 211 are arranged in a circular array on the positioning ring 21.
[0036] Furthermore, the cross-sections of both the anti-detachment groove 121 and the anti-detachment ring 223 are trapezoidal, which ensures that the anti-detachment ring 223 will not separate from the anti-detachment groove 121.
[0037] Before use, the positioning ring 21 and the limiting ring 22 are fitted onto the outer side of the end of the screw body 1, and the limiting block 221 on the side of the limiting ring 22 is movably inserted into the limiting groove 211 on the positioning ring 21. When the screw body 1 is rotated, the screw body 1 is screwed into the connecting component until the positioning ring 21 is in contact with the outer side of the connecting component. Then, as the screw body 1 is rotated, the end of the screw body 1 is pressed against the limiting ring 22 and moves towards the positioning ring 21, and the limiting pin 222 at the end of the limiting block 221 is inserted into the connecting component, which can limit the screw body 1 and prevent the screw body 1 from rotating in the opposite direction and falling off.
[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A type of anti-loosening self-tapping screw, comprising a screw body (1), characterized in that, The screw body (1) is provided with a limiting unit (2) at its end; The limiting unit (2) includes: Positioning ring (21), which is movably sleeved on the outside of the end of screw body (1), and a through limiting groove (211) is provided on the positioning ring (21); A limiting ring (22) is rotatably connected to the end of the screw body (1), and a limiting block (221) is fixedly connected to the side of the limiting ring (22). The limiting block (221) is movably inserted into the limiting groove (211), and a limiting pin (222) is fixedly installed at the end of the limiting block (221).
2. The anti-loosening limiting self-tapping screw according to claim 1, characterized in that, The screw body (1) includes a spiral part (11) and an end (12), which are integrally formed.
3. The anti-loosening limiting self-tapping screw according to claim 2, characterized in that, The positioning ring (21) and the limiting ring (22) are both movably sleeved on the outside of the end of the screw body (1), and the limiting ring (22) is rotatably connected to the end (12).
4. The anti-loosening limiting self-tapping screw according to claim 2, characterized in that, An anti-detachment groove (121) is provided on the side of the end (12) near the limiting ring (22), and an anti-detachment ring (223) is installed on the side of the limiting ring (22) near the end (12), and the anti-detachment ring (223) is in contact with the anti-detachment groove (121).
5. The anti-loosening limiting self-tapping screw according to claim 1, characterized in that, The limiting groove (211) is provided in multiple ways, and the multiple limiting grooves (211) are arranged in a circular array on the positioning ring (21).
6. The anti-loosening limiting self-tapping screw according to claim 4, characterized in that, The cross-sections of the anti-detachment groove (121) and the anti-detachment ring (223) are both set as trapezoidal.