Waterproof fastener

Abstract

The utility model relates to the technical field of fasteners, in particular to a waterproof fastener, which comprises a screw cap, a screw rod coaxially connected with the center of the screw cap, and a nut in threaded connection with the screw rod, and is characterized in that the screw rod comprises a threaded section and a straight rod section, the straight rod section is connected with the screw cap, and the straight rod section is connected with the screw cap. The diameter of the straight rod section is smaller than that of the threaded section, a mounting groove is formed in the connecting position of the nut and the straight rod section, a waterproof ring is arranged in the mounting groove, and the straight rod section is sleeved with the waterproof ring. By forming the mounting groove in the nut and arranging the waterproof ring, the sealing effect between the nut and the waterproof ring can be effectively improved, the waterproof performance is improved, and therefore rainwater is prevented from permeating into the threaded hole.

Description

Technical Field

[0001] The utility model relates to the technical field of fasteners, and in particular to a waterproof fastener. Background Art

[0002] In the machinery industry, fasteners are essential parts, especially bolts. Although the existing bolts can basically meet the basic use requirements of users, in actual use, the bolts used to connect components in open places are easily corroded by environmental factors such as rain, which will cause the threaded ends and the threaded holes on the fasteners to rust over time, making it difficult to disassemble and reduce the strength of the bolts, which will lead to unstable connection equipment and inconvenience for later disassembly and maintenance. Utility Model Content

[0003] In view of this, the utility model aims at the deficiencies of the prior art and proposes a waterproof fastener, which aims to solve the problem that the bolts are easily affected by moisture and corrosion when encountering water, thus shortening the life of the bolts.

[0004] The utility model provides a waterproof fastener, comprising: a nut, a screw rod coaxially connected to the center of the nut, a nut threadedly connected to the screw rod, the screw rod comprising a threaded section and a straight rod section, the straight rod section being connected to the nut, and the diameter of the straight rod section being smaller than the threaded section, an installation groove being provided at the connection between the nut and the straight rod section, a waterproof ring being provided in the installation groove, and the waterproof ring being sleeved on the straight rod section.

[0005] In some embodiments of the present application, the mounting groove includes an embedding groove provided along the axial direction of the nut and a limiting groove provided along the radial direction of the nut, and the embedding groove is connected to the limiting groove.

[0006] In some embodiments of the present application, the cross-section of the waterproof ring is in the shape of a "cross", including a gasket and a first connecting part and a second connecting part connected at both ends of the gasket, the first connecting part is inserted into the embedding groove, the gasket is placed in the limiting groove, and the second connecting part is sleeved on the straight rod section of the screw rod.

[0007] In some embodiments of the present application, the gasket is made of rubber.

[0008] In some embodiments of the present application, the nut includes a first flange connected to the screw rod and a hexagonal ridge fixed on the first flange, and the mounting groove is provided on the first flange.

[0009] In some embodiments of the present application, the nut includes a hexagonal nut body and a second flange fixedly connected to the hexagonal nut body, a limiting groove is provided on the second flange, and a rubber pad is provided in the limiting groove.

[0010] In some embodiments of the present application, the surfaces of the nut, the screw rod and the nut are coated with an anti-corrosion layer and a waterproof protective layer, and the waterproof protective layer is coated on the outer surface of the anti-corrosion layer.

[0011] The utility model discloses a waterproof fastener, which is provided with a mounting groove and a waterproof ring on a nut. The cross section of the waterproof ring is a "cross" design, one end of which is embedded in the nut and the other end is sleeved on the screw rod. The gasket in the middle part is designed in an arc shape. On the one hand, the edge of the threaded hole is sealed and fixed with the fastened object, thereby effectively increasing the sealing effect between the two and improving the waterproofness. On the other hand, by providing the gasket, when the fastened object is fixed, the force generated by the squeezing between the fastened object and the nut makes the gasket fit with the nut and the fastened object, which can further improve the sealing between the two, thereby preventing rainwater from penetrating into the threaded hole and corroding the screw rod. In addition, coating the anti-corrosion layer and the waterproof protective layer on the surface of the bolt can ensure that the screw rod, nut and nut have good corrosion resistance and waterproof performance in harsh environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A front view of a waterproof fastener provided by an embodiment of the utility model;

[0013] Figure 2 A cross-sectional view of a waterproof fastener provided by an embodiment of the utility model;

[0014] Figure 3 A front view of the waterproof ring provided in the embodiment of the utility model;

[0015] Figure 4 A cross-sectional view of a nut provided in an embodiment of the utility model;

[0016] Figure 5 This is a front view of a rubber ring provided in an embodiment of the utility model.

[0017] Among them: 100, nut; 110, hexagonal ridge; 120, first flange plate; 130, installation groove; 131, embedding groove; 132, limiting groove; 200, screw rod; 210, straight rod section; 220, threaded section; 300, nut; 310, hexagonal nut body; 320, second flange plate; 330, limiting groove; 400, waterproof ring; 410, first connecting part; 420, gasket; 430, second connecting part; 500, rubber pad; 510, straight tube part; 520, waterproof pad. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0019] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0020] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0021] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] like Figure 1 and Figure 2As shown, the utility model provides a waterproof fastener, including a nut 100, a screw 200 and a nut 300. The screw 200 is coaxially connected to the center of the nut 300 and is an integrally formed design. The screw 200 includes a threaded section 220 and a straight section 210. The nut 300 is threadedly connected to the threaded section 220. The straight section 210 is connected to the nut 100, and the diameter of the straight section 210 is smaller than the threaded section 220. A mounting groove 130 is provided at the connection between the nut 100 and the straight section 210. A waterproof ring 400 is provided in the mounting groove 130, and the waterproof ring 400 is sleeved on the straight section 210 of the screw 200. After the waterproof ring 400 is sleeved, the diameter of the straight section 210 is consistent with the diameter of the threaded section 220. The waterproof ring 400 is provided at the connection between the screw 200 and the nut 300 to prevent rainwater from flowing into the bolt hole through the gap between the diameter of the bolt and the object being fastened.

[0023] like Figure 2 and Figure 3 As shown, in some embodiments of the present application, the mounting groove 130 includes an embedding groove 131 and a limiting groove 132. The limiting groove 132 is opened along the axial direction of the nut 100 and has a certain depth. The limiting groove 132 is opened along the radial direction of the nut 100 and has a certain width. The embedding groove 131 and the limiting groove 132 are connected.

[0024] In some embodiments of the present application, the waterproof ring 400 is made of rubber and includes a gasket 420 and a first connection portion 410 and a second connection portion 430 connected at both ends of the gasket 420. The first connection portion 410 and the second connection portion 430 are both straight-cylindrical, that is, the cross section of the waterproof ring 400 is in the shape of a "cross". The first connection portion 410 is inserted into the embedding groove 131 on the nut 300, the gasket 420 is placed in the limiting groove 132, and the second connection portion 430 is sleeved on the straight rod section 210 of the screw rod 200. By designing the cross section of the waterproof ring 400 in the shape of a "cross", one end of the waterproof ring 400 is embedded in the nut 300, and the other end is sleeved on the screw rod 200, so that the edge of the threaded hole is sealed and fixed with the fastened object, thereby effectively increasing the sealing effect between the two and improving the waterproof performance. When the fastener is fixed, the force generated by the squeeze between the fastener and the nut 100 makes the gasket 420 fit closely with the fastener, further improving the sealing between the two, thereby preventing rainwater from penetrating into the threaded hole. The gasket 420 can be protected by providing the limit groove 132 to prevent the edge of the gasket 420 from being deformed or punctured by sharp objects due to environmental factors such as sunlight, thereby ensuring the sealing effect of the gasket 420.

[0025] In some embodiments of the present application, the nut 100 includes a first flange connected to the screw 200 and a hexagonal ridge 110 fixed on the first flange. The hexagonal ridge 110 and the first flange are integrally designed, and the mounting groove 130 is provided on the first flange.

[0026] like Figure 4 and Figure 5 As shown, in some embodiments of the present application, the nut 300 includes a hexagonal nut 300 body and a second flange fixedly connected to the hexagonal nut 300 body, and a limiting groove 330 is provided on the second flange, and a rubber pad 500 is provided in the limiting groove 330.

[0027] In some embodiments of the present application, the cross-section of the limiting groove 330 is "L"-shaped, and the rubber pad 500 includes a straight tube portion 510 and a waterproof pad 520. When fixing the fastener, the force generated by the extrusion between the fastener and the nut 300 makes the waterproof pad 520 fit tightly with the fastener, further improving the sealing between the nut 300 and the fastener, thereby preventing rainwater from penetrating into the threaded hole and corroding the screw 200.

[0028] In some embodiments of the present application, the surfaces of the nut 100, the screw rod 200 and the nut 300 are coated with an anti-corrosion layer, and the outer surface of the anti-corrosion layer is coated with a waterproof protective layer. By coating the anti-corrosion layer and the waterproof protective layer, the contact between the bolt and the corrosive environment can be effectively isolated, thereby preventing or reducing the occurrence of bolt corrosion. The anti-corrosion layer and the waterproof protective layer can be a polyurethane coating, a polyurethane coating or a zinc-based coating.

[0029] In the above embodiment, a waterproof fastener is provided with an installation groove 130 at the connection between the nut 300 and the screw 200, a waterproof ring 400 passes through the screw 200, a first connection portion 410 is inserted into the embedding groove 131 of the nut 100, a gasket 420 is placed in the limiting groove 132, a second connection portion 420 is sleeved on the straight rod section 210 of the screw 200, a rubber pad 500 is installed on the nut 300, and a waterproof pad 520 is also provided on the rubber pad 500. After the bolts are fixed to the fastened object, since the cross section of the waterproof ring 400 is a "cross" design, one end of the waterproof ring 400 is embedded in the nut 300 and the other end is sleeved on the screw 200, so that the edge of the threaded hole is sealed and fixed with the fastened object, thereby effectively increasing the sealing effect between the nut 100 and the fastened object, effectively preventing water penetration, improving waterproofness, and improving the service life and performance of the fastener. Through the design of the gasket 420 on the nut 300 and the waterproof pad 520 on the nut 300, an extrusion force is generated between the fastened object, the nut 300 and the nut 100, so that the two gaskets 420 are closely fitted to the fastened object, further improving the sealing performance of the bolt and preventing rainwater from penetrating. The anti-corrosion layer and the waterproof protective layer are coated on the surface of the nut 100, the screw rod 200 and the nut 300, which can ensure that the bolt has good corrosion resistance and waterproof performance in harsh environments.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A waterproof fastener, comprising a nut, a screw rod coaxially connected to the center of the nut, a nut threadedly connected to the screw rod, characterized in that: The screw rod includes a threaded section and a straight rod section, the straight rod section is connected to the nut, and the diameter of the straight rod section is smaller than the threaded section. A mounting groove is provided at the connection between the nut and the straight rod section, a waterproof ring is provided in the mounting groove, and the waterproof ring is sleeved on the straight rod section.

2. The waterproof fastener according to claim 1, characterized in that: The installation groove includes an embedding groove provided along the axial direction of the nut and a limiting groove provided along the radial direction of the nut, and the embedding groove is communicated with the limiting groove.

3. The waterproof fastener according to claim 2, characterized in that: The cross-section of the waterproof ring is in the shape of a "cross", including a gasket and a first connecting part and a second connecting part connected at both ends of the gasket, the first connecting part is inserted into the embedding groove, the gasket is placed in the limiting groove, and the second connecting part is sleeved on the straight rod section of the screw rod.

4. The waterproof fastener according to claim 3, characterized in that: The gasket is made of rubber.

5. The waterproof fastener according to claim 1, characterized in that: The nut includes a first flange connected to the screw rod and a hexagonal ridge fixed on the first flange, and the mounting groove is provided on the first flange.

6. The waterproof fastener according to claim 1, characterized in that: The nut comprises a hexagonal nut body and a second flange fixedly connected to the hexagonal nut body, the second flange is provided with a limiting groove, and a rubber pad is arranged in the limiting groove.

7. The waterproof fastener according to any one of claims 1 to 6, characterized in that: The surfaces of the nut, the screw rod and the nut are coated with an anti-corrosion layer and a waterproof protective layer, and the waterproof protective layer is coated on the outer surface of the anti-corrosion layer.

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