Anti-loosening self-tapping screw

Abstract

This utility model discloses a self-tapping screw designed to prevent detachment, relating to the field of self-tapping screw technology. Specifically, it includes a nut and a screw rod, which are detachably connected. The nut has a groove at the center of its top that mates with a screwdriver. The groove is a modular structure and includes at least two slots. A limiting airbag is fixedly connected to the top of the groove's inner cavity. A plastic bag is fixedly connected to the outer ring of the screw rod's top, and the bag is sealed by a sealing tube. The bottom of the nut has a receiving groove that mates with the sealing tube. A groove is provided on the side wall of the screw rod, with the top of the groove extending into the inner cavity of the plastic bag. This self-tapping screw, with its detachable nut and screw rod, allows for arbitrary assembly of the nut and screw rod during use, increasing their utilization rate. The groove design also allows the screw to be used with various screwdrivers, improving its adaptability.

Description

Technical Field

[0001] This utility model relates to the field of self-tapping screw technology, specifically a self-tapping screw that prevents it from falling off. Background Technology

[0002] Self-tapping screws are screws with a drill bit, installed using specialized power tools, where drilling, tapping, fixing, and tightening are completed in one step. In existing technology, the general method of using self-tapping screws is for the user to insert a screwdriver into the slot on the self-tapping screw, using the screwdriver to rotate the screw and thus screw it in. Because the slots on self-tapping screws are generally shallow, and the slot size is slightly larger than the screwdriver tip, there is a risk of the self-tapping screw falling off during the tightening process, affecting its usability. Furthermore, the slots on self-tapping screws typically only accommodate one type of screwdriver, reducing their practicality. Therefore, this application proposes a self-tapping screw that prevents it from falling off. Summary of the Invention

[0003] This invention provides a self-tapping screw that prevents it from falling off, solving the problem mentioned in the background art where the self-tapping screw may fall off during the screwdriver tightening process, affecting its use, and the self-tapping screw's slot usually only accommodates one type of screwdriver, reducing its practicality.

[0004] This utility model provides the following technical solution: a self-tapping screw that prevents detachment, comprising a nut and a screw rod, wherein the nut and the screw rod are detachably connected, and the top of the nut is provided with a fitting groove adapted to a screwdriver in the middle, the fitting groove being a combined structure, the fitting groove including at least two cutting grooves; a limiting airbag is fixedly connected to the top of the inner cavity of the fitting groove; A plastic bag is fixedly connected to the outer ring at the top of the screw. The plastic bag is sealed by a sealing tube. The bottom of the nut is provided with a receiving groove that matches the sealing tube. A groove is provided on the side wall of the screw, and the top of the groove extends into the inner cavity of the plastic bag.

[0005] Preferably, a threaded post is fixedly connected to the middle of the bottom of the nut, and a threaded hole is provided at the middle of the top of the screw. The threaded hole is adapted to the threaded post, and the nut and the screw are connected through the threaded post and the threaded hole.

[0006] Preferably, there is a gap between the two limiting airbags, and the width of the top of the gap is greater than the width of its bottom.

[0007] Preferably, the inner wall at the bottom of the fitting groove is provided with anti-slip texture.

[0008] Preferably, the outer diameter of the sealing tube is larger than the outer diameter of the screw, and the inner diameter of the sealing tube is smaller than the outer diameter of the screw.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. This anti-loosening self-tapping screw features a detachable connection between the nut and the screw rod, allowing for arbitrary assembly of the nut and screw rod during use, increasing their utilization rate. Furthermore, the fitting groove design allows the self-tapping screw to be compatible with various screwdrivers, enhancing its adaptability.

[0010] This anti-loosening self-tapping screw uses a plastic bag and a sealing tube. As the screw is turned onto an object, the sealing tube is subjected to the limiting pressure of the object. Under this limiting force, the sealing tube gradually separates from the plastic bag, and the adhesive inside the plastic bag can flow along the groove, so that the self-tapping screw is fixed to the object by the adhesive, preventing the self-tapping screw from loosening or falling off due to vibration of the object. Attached Figure Description

[0011] Figure 1 This is a top view schematic diagram of the structure of an embodiment of the present utility model; Figure 2 The structure of this utility model Figure 1 Explosion diagram; Figure 3 This is a schematic diagram showing the separation of the nut and screw in this utility model. Figure 4 The structure of this utility model Figure 3 Diagram showing the view from below; Figure 5 This is a top view of the structural nut of this utility model.

[0012] In the diagram: 1. Nut; 2. Screw; 3. Threaded post; 4. Threaded hole; 5. First cutting groove; 6. Second cutting groove; 7. Limiting airbag; 8. Sealing tube; 9. Receiving groove; 10. Groove; 11. Plastic bag. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0014] This utility model provides a self-tapping screw that prevents it from falling off, including a nut 1 and a screw 2. The nut 1 and the screw 2 are detachably connected. In some embodiments of this application, the nut 1 and the screw 2 are detachably connected by a threaded post 3 and a threaded hole 4. The threaded post 3 is fixedly connected to the middle of the bottom of the nut 1, and the threaded hole 4 is provided in the middle of the top of the screw 2. The threaded hole 4 is adapted to the threaded post 3. With the detachable connection of the nut 1 and the screw 2, the nut 1 and the screw 2 can be arbitrarily assembled when the self-tapping screw is in use, increasing the utilization rate of the nut 1 and the screw 2.

[0015] The top of the nut 1 has a fitting groove in the middle that is adapted to a screwdriver. The fitting groove is a combined structure and includes at least two tool slots. With the fitting groove, the self-tapping screw can be adapted to a variety of screwdrivers during use, thus improving the adaptability of the self-tapping screw.

[0016] In Embodiment 1 of this application, the fitting groove includes a first cutting groove 5 and a second cutting groove 6, wherein the first cutting groove 5 is adapted to a Torx screwdriver, the second cutting groove 6 is adapted to a flathead screwdriver, and the second cutting groove 6 and the first cutting groove 5 are offset from each other.

[0017] A limiting airbag 7 is fixedly connected to the inner wall of the top of the fitting groove. There is a gap between the two limiting airbags 7, and the width of the top of the gap is greater than the width of the bottom, which facilitates the insertion of the screwdriver into the fitting groove. During the insertion process, the screwdriver can squeeze the limiting airbag 7, so that the excess gas in the limiting airbag 7 enters the part away from the screwdriver. When the restriction on the screwdriver is released, the limiting airbag 7 and the screwdriver fit tightly together, so that the self-tapping screw is fixed together with the screwdriver, preventing the self-tapping screw from falling off during the tightening process, and improving the tightening speed of the self-tapping screw.

[0018] The inner wall at the bottom of the fitting groove is provided with anti-slip texture. The anti-slip texture increases the friction between the groove and the screwdriver, preventing slippage and making it easier for the screwdriver to tighten the self-tapping screws.

[0019] A plastic bag 11 is fixedly connected to the outer ring of the top of the screw 2. The plastic bag 11 contains a fixing adhesive, the type of which can be set according to requirements and is not limited here. The plastic bag 11 is sealed by a sealing tube 8, and the plastic bag 11 is located inside the inner cavity of the sealing tube 8. The bottom of the nut 1 has a receiving groove 9 that matches the sealing tube 8. The side wall of the screw 2 has a groove 10, the top of which extends into the inner cavity of the plastic bag 11. The outer diameter of the sealing tube 8 is larger than the outer diameter of the screw 2, and the inner diameter of the sealing tube 8 is smaller than the outer diameter of the screw 2. The size of the sealing tube 8 can be designed according to requirements and is not limited here. With the setting of the sealing tube 8, when the self-tapping screw is screwed into an object, the sealing tube 8 will be subjected to the restraining pressure of the object. Under the action of this restraining force, the sealing tube 8 gradually separates from the plastic bag 11, and the adhesive in the plastic bag 11 can flow along the groove 10, so that the self-tapping screw is fixed to the object by the adhesive, preventing the self-tapping screw from loosening or falling off due to vibration of the object. The plastic bag 11 can be made of plastic, and the sealing tube 8 can be separated from the plastic bag 11 under external force. In summary, when using this anti-loosening self-tapping screw, the user can replace the nut 1 and screw 2 as needed to ensure the self-tapping screw meets their requirements. During the tightening process, the sealing tube 8 is subjected to the restrictive pressure of the object. Under the action of this restrictive force, the sealing tube 8 gradually separates from the plastic bag 11. The adhesive inside the plastic bag 11 can flow along the groove 10, allowing the self-tapping screw to be fixed to the object through the adhesive, preventing the self-tapping screw from loosening or falling off due to vibration of the object, thus improving the reliability of the self-tapping screw.

[0020] All standard parts used in this utility model can be purchased from the market, and irregular parts can be customized according to the description and drawings. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art, which will not be described in detail here. The contents not described in detail in this specification belong to the prior art known to those skilled in the art. Although the embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A self-tapping screw designed to prevent detachment, comprising a nut (1) and a screw (2), characterized in that: The nut (1) is detachably connected to the screw (2). The top of the nut (1) is provided with a fitting groove adapted to the screwdriver. The fitting groove is a combined structure and includes at least two tool slots. The top of the inner cavity of the fitting groove is fixedly connected to a limiting airbag (7). A plastic bag (11) is fixedly connected to the outer ring of the top end of the screw (2). The plastic bag (11) is sealed by a sealing tube (8). The bottom of the nut (1) is provided with a receiving groove (9) that is compatible with the sealing tube (8). A groove (10) is provided on the side wall of the screw (2). The top end of the groove (10) extends into the inner cavity of the plastic bag (11).

2. The anti-loosening self-tapping screw according to claim 1, characterized in that: The nut (1) has a threaded post (3) fixedly connected to the middle of its bottom, and the screw (2) has a threaded hole (4) at the middle of its top. The threaded hole (4) is adapted to the threaded post (3), and the nut (1) and the screw (2) are connected through the threaded post (3) and the threaded hole (4).

3. The anti-loosening self-tapping screw according to claim 1, characterized in that: There is a gap between the two limiting airbags (7), and the width of the top of the gap is greater than the width of its bottom.

4. The anti-loosening self-tapping screw according to claim 1, characterized in that: The inner wall at the bottom of the fitting groove is provided with anti-slip texture.

5. The anti-loosening self-tapping screw according to claim 1, characterized in that: The outer diameter of the sealing tube (8) is greater than the outer diameter of the screw (2), and the inner diameter of the sealing tube (8) is smaller than the outer diameter of the screw (2).

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