A self-tapping aircraft expansion screw dedicated to EPP

Abstract

The utility model discloses a special self -drilling aircraft expansion screw of EPP, including screw main part, the outer wall of screw main part is equipped with screw thread, and is equipped with the screw thread opening of gradual change on the screw thread, the outside of screw main part is equipped with the opening, the top of screw main part is equipped with the mounting hole, the inside of screw main part is equipped with the screw hole, the utility model discloses a special structure through the screw thread and the screw thread opening of gradual change on screw main part outer wall, this screw structure is convenient for making into EPP simultaneously, can extrude the EPP structure layer of being destroyed together, avoids the loosening, further improves the stability of screw assembly, and the structural design of cooperation opening can extrude the EPP material of excess into this hole, avoids the defect that the surface bulge is uneven when this screw makes into EPP, utilizes the structure cooperation of mounting hole and screw hole, and it is convenient for the accessory of needing installation to be connected.

Description

Technical Field

[0001] This utility model relates to the field of screw technology, specifically to a self-tapping aircraft expansion screw for EPP. Background Technology

[0002] Self-tapping aircraft expansion screws are a special type of fastener that combines self-tapping threads with expansion fixing principles. They are commonly used in scenarios where objects need to be fixed quickly and securely, and are especially widely used in materials such as metal, wood, and plastic.

[0003] Existing EPP products generally use screws for fastening, but in order to meet strength standards, they can usually only be assembled by pre-embedding. However, pre-embedding is costly, difficult, and poses safety hazards during operation, making it difficult for existing screws to meet the fixing requirements of EPP products. Utility Model Content

[0004] The purpose of this invention is to provide a self-tapping aircraft expansion bolt specifically for EPP, in order to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a self-tapping aircraft expansion screw for EPP, comprising a screw body, the outer wall of the screw body being provided with threads, and the threads having a gradient thread opening, the outer side of the screw body being provided with an opening, the top of the screw body being provided with an installation hole, and the interior of the screw body being provided with a threaded hole.

[0006] Preferably, the thread is a rotary gradient thread, and the opening of the rotary gradient thread is evenly distributed on the outer side of the rotary gradient thread. The structural design of the gradient thread improves the stability of the screw body when driven into the EPP product and enhances its anti-loosening effect.

[0007] Preferably, the opening is located at the bottom of the outer side of the screw body. The opening structure at the bottom facilitates the extension of the compressed material into the opening when the screw body contacts the EPP product material, thus preventing the material from protruding and causing defects such as unevenness in the product.

[0008] Preferably, the mounting hole has a cross-shaped structure and is located at the middle of the top of the screw body, which facilitates the connection and fixation of the accessory by opening a slot structure that matches the accessory.

[0009] Preferably, the threaded hole is located in the middle of the screw body, and the threaded hole is connected to the vertical plane of the mounting hole. The threaded hole facilitates the connection and fixation of accessories with screws, making the assembly of the screw body easier.

[0010] Preferably, a protective sleeve is provided at the top of the outer side of the screw body, and the outer side of the protective sleeve is provided with anti-slip texture to increase the protection of the screw body assembly.

[0011] The self-tapping aircraft expansion screw specifically for EPP proposed in this utility model has at least the following beneficial effects:

[0012] The special structure of the screw body's outer wall, featuring threads and tapered thread openings, facilitates the screw's insertion into EPP while simultaneously squeezing together any damaged EPP structural layers, preventing loosening and further enhancing the stability of the screw assembly. The opening design also allows excess EPP material to be squeezed into the hole, preventing surface bulging and unevenness when the screw is driven into the EPP. The combination of mounting holes and threaded holes facilitates the connection of accessories, eliminating the need for pre-embedded assembly methods and allowing the screw structure to be directly driven into EPP products for fixation, thus improving the operability and stability of screw fixing. Attached Figure Description

[0013] Figure 1 This is the first perspective view of the present invention;

[0014] Figure 2 This is a second perspective view of the present invention;

[0015] Figure 3 This is a top view of the present invention.

[0016] In the diagram: 1. Screw body; 2. Screw thread; 3. Gradient thread opening; 4. Opening; 5. Mounting hole; 6. Threaded hole. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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] Please see Figure 1-3 The present invention provides an embodiment of a self-tapping aircraft expansion screw for EPP, comprising a screw body 1, the outer wall of the screw body 1 being provided with threads 2, and the threads 2 being provided with a gradient thread opening 3, the threads 2 being a rotary gradient thread, and the gradient thread opening 3 being evenly arranged on the outer side of the rotary gradient thread. By utilizing the structural design of the gradient thread, the stability of the screw body 1 in driving into EPP products and the anti-loosening effect are improved.

[0019] An opening 4 is provided on the outer side of the screw body 1. The opening 4 is located at the bottom of the outer side of the screw body 1. The structure of the opening 4 at the bottom facilitates the extension of the squeezed material into the opening 4 when the screw body 1 comes into contact with the EPP product material, thus avoiding the material from protruding and causing defects such as unevenness in the product.

[0020] The top of the screw body 1 is provided with a mounting hole 5. The mounting hole 5 has a cross-shaped structure and is located in the middle of the top of the screw body 1. This facilitates the connection and fixation of the accessories by opening a slot structure that matches the accessories.

[0021] The screw body 1 has a threaded hole 6 inside, which is located in the middle of the screw body 1. The threaded hole 6 is connected to the vertical plane of the mounting hole 5. The threaded hole facilitates the connection and fixation of accessories by screws, making the assembly of the screw body 1 convenient. The top of the outer side of the screw body 1 is provided with a protective sleeve, and the outer side of the protective sleeve is provided with anti-slip texture to increase the protection of the screw body 1 during assembly.

[0022] Working principle: This is a self-tapping aircraft expansion bolt specifically designed for EPP;

[0023] By providing threads 2 on the outer wall of the screw body 1 and opening a gradient thread opening 3 on the threads 2, the special structure of the rotating gradient thread of the threads 2 makes it easy to screw into the EPP and avoids the screw body 1 from loosening as a whole. The structure of the gradient thread opening 3 makes it easy for the damaged EPP structural layers to be squeezed together when the screw body 1 is driven into the EPP, further improving the stability of the assembly between the screw body 1 and the EPP and preventing the screw from shaking and loosening.

[0024] During the screw driving into the EPP, the opening and closing of the opening 4 allows excess material inside the EPP to be automatically squeezed into this hole, preventing bulging and unevenness on the EPP surface caused by the screw pressing against the structural layer. This improves the functionality and practical value of the screw structure in fixing EPP products. Furthermore, the mounting hole 5 and threaded hole 6 facilitate the pre-setting of the mounting hole 5 with the connection hole that matches the accessories to be installed. This allows the accessories to be installed on the top surface of the screw body 1 using the screw, while simultaneously connecting the screw with the threaded hole 6, improving the stability of the accessory connection and increasing the efficiency of screw and EPP product assembly.

[0025] 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.

[0026] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A self-tapping aircraft expansion bolt specifically for EPP, comprising a bolt body (1), characterized in that: The outer wall of the screw body (1) is provided with threads (2), and the threads (2) are provided with a gradient thread opening (3). An opening (4) is provided on the outer side of the screw body (1). An installation hole (5) is provided on the top of the screw body (1). A threaded hole (6) is provided inside the screw body (1).

2. The self-tapping aircraft expansion bolt for EPP as described in claim 1, characterized in that: The thread (2) is a rotary gradient thread, and the opening (3) of the gradient thread is evenly arranged on the outside of the rotary gradient thread.

3. The self-tapping aircraft expansion bolt for EPP as described in claim 1, characterized in that: The opening (4) is located at the bottom of the outside of the screw body (1).

4. The self-tapping aircraft expansion bolt for EPP as described in claim 1, characterized in that: The mounting hole (5) has a cross-shaped structure and is located at the middle position of the top of the screw body (1).

5. The self-tapping aircraft expansion bolt for EPP as described in claim 1, characterized in that: The threaded hole (6) is located in the middle of the screw body (1), and the threaded hole (6) is connected to the vertical plane of the mounting hole (5).

6. The self-tapping aircraft expansion bolt for EPP as described in claim 1, characterized in that: The screw body (1) has a protective sleeve on its top outer side, and the outer side of the protective sleeve has anti-slip texture.

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