A self-tapping screw

Abstract

This utility model provides a self-tapping screw with anti-slip threads, relating to the field of screw technology. It includes a self-tapping screw body with a mounting groove on its top. A friction pad is disposed inside the mounting groove, and multiple protrusions are distributed on the friction pad. A mounting ring is disposed on the outer side of the self-tapping screw body. This utility model utilizes the elasticity of a spring plate to facilitate the connection between the washer and the surface of the connector when the self-tapping screw body is threadedly connected to the connector. The friction post increases the friction between the washer and the connector. As the self-tapping screw body is gradually tightened, the spring plate generates a continuous axial preload, tightly pressing the washer and the connector surface together, reducing gaps and improving the tightness between the self-tapping screw body and the connector. Simultaneously, the washer increases the contact area between the self-tapping screw body and the connector surface, further ensuring the stability of the connection and effectively reducing the possibility of the self-tapping screw body loosening.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, and in particular to a self-tapping screw with anti-slip threads. Background Technology

[0002] Self-tapping screws are fasteners that do not require pre-tapping of the material being fastened. They directly "cut / extrude" the material through their own thread structure to form matching threads, achieving fastening. They are widely used for connecting substrates such as wood, plastic, and thin metal sheets (such as steel plates and aluminum profiles). With their core advantages of "no tapping required and easy installation," they have become a basic connector in the civil, industrial, and construction fields.

[0003] Existing self-tapping screws, under vibration, impact, or long-term stress, will continuously wear down the mating surfaces between the screw and the fastened material due to continuous vibration. This causes gaps to gradually appear in the originally tight thread engagement, leading to the screw loosening or even falling off, which seriously affects the stability of the connection structure. Utility Model Content

[0004] The purpose of this invention is to solve the problem that in the prior art, self-tapping screws under vibration, impact, or long-term stress will continuously wear down the meshing surface between the screw and the fastened material, causing the originally tight thread engagement to gradually develop gaps, resulting in the screw becoming loose or even falling off, which seriously affects the stability of the connection structure. Therefore, this invention proposes a self-tapping screw with anti-slip threads.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a self-tapping screw with anti-slip threads, comprising a self-tapping screw body, an installation groove being provided on the top of the self-tapping screw body, a friction pad being provided inside the installation groove, a plurality of protrusions being distributed on the friction pad, an installation ring being provided on the outer side of the self-tapping screw body, a plurality of spring pieces being distributed at the bottom of the installation ring, a washer being connected to one end of the spring piece, and a plurality of friction posts being distributed at the bottom of the washer.

[0006] Preferably, a sleeve ring is provided on the outer side of the self-tapping screw body, a connecting bolt is threaded to the side of the sleeve ring, and a fixing bracket is installed on the top of the sleeve ring.

[0007] Preferably, the fixing frame is internally threaded with a bidirectional screw, and connecting frames are symmetrically arranged on the outer side of the bidirectional screw.

[0008] Preferably, one end of the connecting bracket is connected to a clamping plate, and the clamping plate is located on the top of the self-tapping screw body.

[0009] Preferably, the bottom of the self-tapping screw body is provided with a slope.

[0010] Preferably, the clamping plate is positioned above the mounting groove.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: 1. In this utility model, when the self-tapping screw body and the connector are threaded together, the elasticity of the spring plate helps to push the washer to connect with the surface of the connector, and the friction post helps to increase the friction between the washer and the connector. As the self-tapping screw body is gradually tightened, the spring plate forms a continuous axial preload, which presses the washer and the surface of the connector tightly together, reduces the gap, and improves the tightness between the self-tapping screw body and the connector. At the same time, the washer increases the contact area between the self-tapping screw body and the surface of the connector, further ensuring the stability of the connection and effectively reducing the phenomenon of loosening of the self-tapping screw body. The spring plate helps to buffer the impact force from the outside, reducing the impact force directly acting on the self-tapping screw body, and further ensuring the reliability of the connection structure.

[0012] 2. In this utility model, friction pads are distributed inside the mounting groove, and multiple protrusions help increase the friction between the screwdriver and the screwdriver. At the same time, the sleeve ring is fitted on the outside of the self-tapping screw body, and the connecting bolt helps to limit the installation of the sleeve ring. Manually rotating the bidirectional screw helps to drive the two connecting brackets to move towards each other on the outside of the bidirectional screw, which in turn helps to move the clamping plate closer to the screwdriver, so that the clamping plate provides a clamping effect on the screwdriver, reducing the occurrence of stripping of the self-tapping screw head and improving operational safety. Attached Figure Description

[0013] Figure 1 A three-dimensional structural diagram of a self-tapping screw with anti-slip threads is provided for this utility model; Figure 2 This utility model presents a schematic diagram of a self-tapping screw with anti-slip threads from another angle. Figure 3 A partial structural diagram of a self-tapping screw with anti-slip threads is provided for this utility model; Figure 4 This utility model presents a partial structural diagram of a self-tapping screw with anti-slip threads.

[0014] Illustration: 1. Self-tapping screw body; 2. Slope; 3. Friction pad; 4. Protrusion; 5. Clamping plate; 6. Connecting bracket; 7. Double-acting screw; 8. Fitting ring; 9. Connecting bolt; 10. Fixing bracket; 11. Mounting ring; 12. Spring; 13. Washer; 14. Friction post. Detailed Implementation

[0015] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0016] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0017] Example 1: As Figures 1-4 As shown, this utility model provides a technical solution: a self-tapping screw with anti-slip threads, including a self-tapping screw body 1, a mounting groove is provided on the top of the self-tapping screw body 1, a friction pad 3 is provided inside the mounting groove, a plurality of protrusions 4 are distributed on the friction pad 3, a mounting ring 11 is provided on the outer side of the self-tapping screw body 1, a plurality of spring pieces 12 are distributed at the bottom of the mounting ring 11, a washer 13 is connected to one end of the spring piece 12, a plurality of friction posts 14 are distributed at the bottom of the washer 13, and a ramp 2 is provided at the bottom of the self-tapping screw body 1.

[0018] In this embodiment, an installation ring 11 is provided on the outer side of the self-tapping screw body 1. When the self-tapping screw body 1 and the connector are threadedly connected, the elasticity of the spring piece 12 helps to push the washer 13 to connect with the surface of the connector. The friction post 14 helps to increase the friction between the self-tapping screw body 1 and the connector. As the self-tapping screw body 1 is gradually tightened, the spring piece 12 forms a continuous axial preload, which tightly presses the washer 13 and the surface of the connector, reducing the gap and improving the tightness between the self-tapping screw body 1 and the connector. At the same time, the washer 13 increases the contact area between the self-tapping screw body 1 and the surface of the connector, further ensuring the stability of the connection and effectively reducing the occurrence of loosening of the self-tapping screw body 1. The spring piece 12 helps to buffer the impact force from the outside, reducing the impact force directly acting on the self-tapping screw body 1, and further ensuring the reliability of the connection structure.

[0019] Example 2: Figures 1-4 As shown, a sleeve ring 8 is provided on the outer side of the self-tapping screw body 1. A connecting bolt 9 is threadedly connected to the side of the sleeve ring 8. A fixing bracket 10 is installed on the top of the sleeve ring 8. A double-ended screw 7 is threadedly connected to the inside of the fixing bracket 10. A connecting bracket 6 is symmetrically arranged on the outer side of the double-ended screw 7. A clamping plate 5 is connected to one end of the connecting bracket 6. The clamping plate 5 is located on the top of the self-tapping screw body 1 and above the mounting groove.

[0020] In this embodiment, placing the screwdriver inside the mounting slot facilitates the installation of the self-tapping screw body 1. The friction pads 3 are distributed inside the mounting slot, and the multiple protrusions 4 help increase the friction between the screwdriver and the pad. Simultaneously, the sleeve ring 8 is fitted onto the outside of the self-tapping screw body 1, and the connecting bolt 9 helps to limit the installation of the sleeve ring 8. Manually rotating the bidirectional screw 7 helps to move the two connecting brackets 6 towards each other on the outside of the bidirectional screw 7, which in turn helps to bring the clamping plate 5 closer to the screwdriver, so that the clamping plate 5 provides a clamping effect on the screwdriver, reducing the occurrence of stripping at the head of the self-tapping screw body 1 and improving operational safety. The ramp 2 helps to guide the self-tapping screw body 1 to operate accurately and reduce jamming during screwing.

[0021] The working principle of this embodiment is as follows: In use, the screwdriver is first placed inside the mounting slot, which facilitates the installation of the self-tapping screw body 1. Friction pads 3 are distributed inside the mounting slot, and multiple protrusions 4 help increase the friction between the screwdriver and the pad. Simultaneously, the retaining ring 8 is fitted onto the outside of the self-tapping screw body 1. The connecting bolt 9 provides a limiting installation for the retaining ring 8. Manually rotating the bidirectional screw 7 helps move the two connecting brackets 6 towards each other on the outside of the bidirectional screw 7, thereby helping to bring the clamping plate 5 closer to the screwdriver. This allows the clamping plate 5 to hold the screwdriver, reducing the self-tapping force. To prevent the head of the self-tapping screw body 1 from stripping, an installation ring 11 is provided on the outer side of the self-tapping screw body 1. When the self-tapping screw body 1 is threadedly connected to the connector, the elasticity of the spring piece 12 helps to push the washer 13 to connect with the surface of the connector. The friction post 14 helps to increase the friction between the self-tapping screw body 1 and the connector. As the self-tapping screw body 1 is gradually tightened, the spring piece 12 forms a continuous axial preload, which tightly presses the washer 13 against the surface of the connector, reduces the gap, and improves the tightness between the self-tapping screw body 1 and the connector, effectively reducing the occurrence of loosening of the self-tapping screw body 1.

[0022] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A self-tapping screw with anti-slip threads, comprising a self-tapping screw body (1), characterized in that: The self-tapping screw body (1) has an installation groove on its top. A friction pad (3) is provided inside the installation groove. Multiple protrusions (4) are distributed on the friction pad (3). An installation ring (11) is provided on the outside of the self-tapping screw body (1). Multiple spring pieces (12) are distributed at the bottom of the installation ring (11). One end of the spring piece (12) is connected to a washer (13). Multiple friction posts (14) are distributed at the bottom of the washer (13).

2. The self-tapping screw with anti-slip threads according to claim 1, characterized in that: The self-tapping screw body (1) is provided with a sleeve ring (8) on the outside, and a connecting bolt (9) is threaded to the side of the sleeve ring (8). A fixing bracket (10) is installed on the top of the sleeve ring (8).

3. The self-tapping screw with anti-slip threads according to claim 2, characterized in that: The fixing frame (10) is internally threaded with a bidirectional screw (7), and a connecting frame (6) is symmetrically arranged on the outer side of the bidirectional screw (7).

4. The self-tapping screw with anti-slip threads according to claim 3, characterized in that: One end of the connecting frame (6) is connected to a clamp (5), which is located on the top of the self-tapping screw body (1).

5. The self-tapping screw with anti-slip threads according to claim 1, characterized in that: The bottom of the self-tapping screw body (1) is provided with a ramp (2).

6. The self-tapping screw with anti-slip threads according to claim 4, characterized in that: The clamp (5) is positioned above the mounting slot.

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