Pressing rivet screw

Abstract

The utility model relates to the field of press riveting screw design, and discloses a press riveting screw which comprises a screw head, a screw rod is fixedly connected to the middle of the screw head, double thread grooves are formed in the periphery of the screw rod, a plurality of tooth grooves are formed in the upper portion of the screw head, a plurality of waterproof teeth are fixedly connected to the upper portion of the screw head, and the screw head and the screw rod form a screw body. A hexagonal block is fixedly connected to the upper portion of the screw head, a cross groove is formed in the hexagonal block, a hexagonal groove is formed in the middle of the hexagonal block, an anti-corrosion assembly is arranged on the outer side of the screw body and comprises a zinc bottom coating, and the zinc bottom coating is fixedly connected to the periphery of the screw body. According to the anti-corrosion bolt, through cooperation of the waterproof teeth, the hexagonal block, the hexagonal groove, the bolt head, the cross-shaped groove and the tooth groove, liquid is prevented from flowing into the surface of the bolt to corrode the bolt, the bolt can be conveniently disassembled through various tools, and through cooperation of the anti-corrosion assembly, the bolt is effectively prevented from being corroded.

Description

Technical Field

[0001] The utility model relates to the field of pressure riveting screw design, in particular to a pressure riveting screw. Background Art

[0002] A self-clinching screw is a component that mechanically connects a stud to a workpiece. This connection method is usually used for materials such as metal plates, alloy plates, composite materials, etc. to form a reliable threaded connection. The use of self-clinching screws can provide a fast, effective and reliable connection without pre-fabricating threads on the workpiece in advance.

[0003] After searching, Chinese patent announcement number: CN204878234U discloses a self-clinching screw, including a screw head, a rod portion and a self-clinching part, wherein the rod portion is provided with a thread, and the self-clinching part is integrally formed between the screw head and the rod portion to connect the screw head and the rod portion, and the self-clinching part includes a flower tooth portion, a column portion and a cone portion, wherein the column portion, the cone portion and the rod portion are coaxial, the column portion is protrudingly formed on the lower end surface of the screw head, the rod portion extends from the cone portion, a pressure relief groove is formed between the column portion and the cone portion, the inner wall of the pressure relief groove is a surface with alternating gaps, the flower tooth portion surrounds the column portion and protrudes from the column portion to the periphery of the lower end surface of the screw head, and the flower tooth portion is connected to the periphery of the screw head in an arc shape.

[0004] In the above utility model, there is an inclined groove under the screw head of the self-clinching screw and the connection between the workpiece, which will allow liquid to flow from the connection to the outside of the rod body and corrode the screw, thereby reducing the hardness of the screw and resulting in a shortened life of the screw. Therefore, a self-clinching screw is proposed to solve the above problem. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides a self-clinching screw, which aims to improve the problem in the prior art that the connection between the screw head and the workpiece allows liquid to flow into the surface of the stud to corrode the stud and reduce the service life of the screw.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a self-clinching screw, comprising a screw head, a screw rod is fixedly connected to the middle part of the screw head, a double thread groove is opened on the outer periphery of the screw rod, a plurality of tooth grooves are opened on the upper part of the screw head, a plurality of waterproof teeth are fixedly connected to the upper part of the screw head, the screw head and the screw rod constitute a nail body, a hexagonal block is fixedly connected to the upper part of the screw head, a cross groove is opened inside the hexagonal block, a hexagonal groove is opened in the middle part of the hexagonal block, and an anti-corrosion component is arranged on the outside of the nail body.

[0007] Through the above technical solution, the waterproof teeth can be inserted into the connecting piece to prevent water from corroding the stud from the connection between the screw head and the connecting piece.

[0008] Furthermore, the anti-corrosion component includes a zinc primer coating, the zinc primer coating is fixedly connected to the periphery of the nail body, and an acid- and alkali-resistant coating is fixedly connected to the outer side of the zinc primer coating.

[0009] Through the above technical solution, the multi-layer structure can prevent screw corrosion from affecting the stability of the screw connection.

[0010] Furthermore, the material used for the nail body is alloy steel, and the zinc primer layer is specifically prepared by an electrochemical deposition method.

[0011] Through the above technical solution, the galvanized screws can resist oxidation and prevent corrosion.

[0012] Furthermore, the bottom of the screw is in a pointed cone shape.

[0013] Through the above technical solution, the pointed cone makes it easier for the screw to enter the interior of the connecting piece.

[0014] Furthermore, the waterproof teeth are in a circular ring shape and are concentric with the axis of the screw.

[0015] Through the above technical solution, the waterproof teeth bite on the surface of the workpiece.

[0016] Furthermore, the acid- and alkali-resistant coating is a passivation layer prepared using a solvent-based silane passivating agent.

[0017] Through the above technical solution, the acid-alkali resistant coating can prevent the surface of the screw from being oxidized and causing a reduction in strength.

[0018] Furthermore, the tooth shape of the waterproof teeth is a trapezoid with the hypotenuse facing outwards.

[0019] Through the above technical solution, the waterproof teeth are used to prevent liquid from entering the connection between the stud and the workpiece.

[0020] Furthermore, the depth of the cross groove is greater than the depth of the hexagonal groove.

[0021] Through the above technical solution, the depth of the cross slot is greater than that of the hexagonal slot, so that it will not be misplaced during use.

[0022] Through the above technical solution, the cross slot and the hexagonal slot are convenient for removing the screws using different tools.

[0023] The utility model has the following beneficial effects:

[0024] 1. In the utility model, through the cooperation of waterproof teeth, hexagonal blocks, hexagonal grooves, screw heads, cross grooves and tooth grooves, the waterproof teeth bite on the surface of the workpiece, which can prevent liquid from flowing from the screw head and the workpiece surface into the connection between the stud and the workpiece. The hexagonal grooves, hexagonal blocks and cross grooves can be used with a variety of tools to remove the screws, thereby preventing liquid from entering the connection to corrode the screws, reducing the hardness of the screws, and facilitating the use of a variety of tools to remove the screws, thereby extending the service life of the screws.

[0025] 2. In the utility model, the surface of the screw is galvanized by the cooperation of the anti-corrosion component, and then the galvanized screw is chrome-plated, which effectively prevents the corrosion of the screw, prolongs its life, and enhances the hardness of the screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A three-dimensional schematic diagram of a self-clinching screw proposed by the utility model;

[0027] Figure 2 This is a structural schematic diagram of a screw rod of a self-clinching screw proposed by the utility model;

[0028] Figure 3 The utility model is a schematic structural diagram of a zinc primer coating of a self-clinching screw.

[0029] Legend:

[0030] 1. Screw head; 2. Hexagonal block; 3. Cross groove; 4. Hexagonal groove; 5. Screw; 6. Double thread groove; 7. Tooth groove; 8. Waterproof teeth; 9. Nail body; 10. Zinc base coating; 11. Acid and alkali resistant coating. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1-3, an embodiment of the utility model is provided: a pressure riveting screw, including a screw head 1, a screw rod 5 is fixedly connected to the middle part of the screw head 1, a double thread groove 6 is opened on the outer periphery of the screw rod 5, a plurality of tooth grooves 7 are opened on the upper part of the screw head 1, a plurality of waterproof teeth 8 are fixedly connected to the upper part of the screw head 1, the screw head 1 and the screw rod 5 constitute a nail body 9, a hexagonal block 2 is fixedly connected to the upper part of the screw head 1, a cross groove 3 is opened inside the hexagonal block 2, a hexagonal groove 4 is opened in the middle part of the hexagonal block 2, an anti-corrosion component is arranged on the outside of the nail body 9, the bottom shape of the screw rod 5 is a pointed cone, the waterproof tooth 8 is annular and concentric with the axis of the screw rod 5, the tooth shape of the waterproof tooth 8 is a trapezoid with the hypotenuse facing outward, and the depth of the cross groove 3 is greater than the depth of the hexagonal groove 4.

[0033] Specifically, the screw head 1 is the top part of the pressure riveting screw, which is used to provide a means of rotation and applying pressure. The screw head 1 usually has a plurality of tooth grooves 7 and waterproof teeth 8, as well as a structure for fixing other parts. The screw 5 is located in the middle of the screw head 1, and the function of the pressure riveting screw is realized by rotating the screw head 1. The outer circumference of the screw 5 is provided with a double thread groove 6, which helps to improve the efficiency of pressure riveting. The double thread groove 6 is located in the two thread grooves on the outer circumference of the screw 5, which helps to improve the connection strength with other parts and make the pressure riveting more secure. The plurality of tooth grooves 7 are located in the tooth grooves 7 on the upper part of the screw head 1, which are used to facilitate prying open the screw so that the entire screw can be rotated more easily. The waterproof teeth 8 are fixedly connected to the upper part of the screw head 1, in a circular ring shape, and are concentric with the axis of the screw 5. These waterproof teeth 8 are designed to provide a waterproof function to prevent liquid from penetrating into the connecting part of the screw. The hexagonal block 2 fixedly connected to the upper part of the screw head 1 is used to provide additional rotation means, making the screw easier to install or remove. The pointed cone shape makes it easier for the screw to enter the interior of the connector. The cross slot 3 located inside the hexagonal block 2 is used to receive a screwdriver or other tools to make it easier to rotate the screw. The hexagonal slot 4 located in the middle of the hexagonal block 2 is used to receive a screwdriver or other tools to provide an additional means of rotation. The nail body 9 is composed of a screw head 1 and a screw rod 5, which is the main structure of the entire self-clinching screw.

[0034] Reference Figure 1-3 The anti-corrosion component includes a zinc primer 10, which is fixedly connected to the outer periphery of the nail body 9, and an acid-base resistant coating 11 is fixedly connected to the outer side of the zinc primer 10. The material used for the nail body 9 is alloy steel, and the zinc primer 10 is specifically prepared by an electrochemical deposition method. The acid-base resistant coating 11 is a passivation layer prepared by a solvent-based silane passivating agent. The order of the coating from the inside to the outside is the nail body 9, the zinc primer 10 and the acid-base resistant coating 11.

[0035] Specifically, the zinc primer 10 is usually prepared by an electrochemical deposition method to provide corrosion protection for the metal surface. The zinc primer 10 forms a barrier layer to prevent corrosion of the nail body 9 by the external environment. Copper plating can be used to improve the conductivity of the metal surface and provide additional corrosion protection. Nickel plating can increase the surface hardness, provide additional corrosion protection, and improve the appearance. The acid and alkali resistant coating 11 provides additional corrosion protection and improves the adhesion of the coating, and can also enhance the durability of the metal surface.

[0036] Working principle: The main components of the self-clinching screw include a screw head 1, a screw rod 5, waterproof teeth 8, a hexagonal block 2, etc., forming an integral structure called a nail body 9. The upper part of the screw head 1 is designed with tooth grooves 7 and waterproof teeth 8 for rotation and providing additional means of rotation. The screw rod 5 is located in the middle of the screw head 1, and the self-clinching function is realized by the rotation of the screw head 1. A double thread groove 6 is provided on its outer periphery to improve the connection strength. The anti-corrosion component covers a zinc primer coating 10 and an acid-base resistant coating 11, which are used to provide corrosion protection and enhance the durability of the metal surface. Specifically, the anti-corrosion component is prepared by electrochemical deposition and solvent-based silane passivation agent to form a series of layers, including a zinc primer coating 10 and an acid-base resistant coating 11. The zinc primer coating 10 provides corrosion protection for the metal surface, while the acid-base resistant coating 11 provides additional corrosion protection and enhances the adhesion of the coating.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A self-clinching screw, comprising a screw head (1), characterized in that: A screw rod (5) is fixedly connected to the middle of the screw head (1), a double thread groove (6) is provided on the outer circumference of the screw rod (5), a plurality of tooth grooves (7) are provided on the upper part of the screw head (1), a plurality of waterproof teeth (8) are fixedly connected to the upper part of the screw head (1), the screw head (1) and the screw rod (5) constitute a nail body (9), a hexagonal block (2) is fixedly connected to the upper part of the screw head (1), a cross groove (3) is provided inside the hexagonal block (2), a hexagonal groove (4) is provided in the middle of the hexagonal block (2), and an anti-corrosion component is provided on the outer side of the nail body (9).

2. The self-clinching screw according to claim 1, characterized in that: The anti-corrosion component comprises a zinc primer coating (10), wherein the zinc primer coating (10) is fixedly connected to the outer periphery of the nail body (9), and an acid- and alkali-resistant coating (11) is fixedly connected to the outer side of the zinc primer coating (10).

3. The self-clinching screw according to claim 2, characterized in that: The material used for the nail body (9) is alloy steel, and the zinc primer layer (10) is specifically prepared by an electrochemical deposition method.

4. The self-clinching screw according to claim 2, characterized in that: The bottom of the screw (5) is in the shape of a pointed cone.

5. The self-clinching screw according to claim 1, characterized in that: The waterproof teeth (8) are in the shape of a ring and are concentric with the axis of the screw (5).

6. The self-clinching screw according to claim 2, characterized in that: The acid- and alkali-resistant coating (11) is a passivation layer prepared using a solvent-based silane passivating agent.

7. The self-clinching screw according to claim 1, characterized in that: The tooth shape of the waterproof teeth (8) is a trapezoid with the oblique sides facing outwards.

8. The self-clinching screw according to claim 1, characterized in that: The depth of the cross groove (3) is greater than the depth of the hexagonal groove (4).

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