Rust-proof hexagonal nut with composite coating

Abstract

The utility model discloses a composite coating rust-proof hexagon nut, which belongs to the technical field of mechanical parts and comprises a hexagon nut body, a protective bottom plate is fixedly mounted at the bottom of the hexagon nut body, a supporting frame is fixedly mounted on the outer side of the top of the protective bottom plate, and a limiting telescopic rod is fixedly mounted at the bottom of an inner cavity of the supporting frame. A protection frame is fixedly installed at the top of the limiting telescopic rod, a compression spring is fixedly installed at the bottom of an inner cavity of the supporting frame, a bottom layer, a middle layer and a surface layer are arranged on the outer side surface of the hexagonal nut body, the bottom layer covers the outer side of the hexagonal nut body, and the middle layer covers the outer side of the bottom layer; and the surface layer covers the outer side of the middle layer. According to the anti-rust hexagonal nut, the hexagonal nut body can be protected, the outside of the hexagonal nut body is prevented from being damaged, the practicability of the anti-rust hexagonal nut is improved, the anti-rust performance of the anti-rust hexagonal nut is greatly improved, and the service life of the anti-rust hexagonal nut is greatly prolonged through the synergistic effect of the coatings.

Description

A composite coated rust-proof hexagonal nut Technical Field

[0001] This utility model relates to the field of mechanical parts technology, and in particular to a composite coated rust-proof hexagonal nut. Background Technology

[0002] Hex nuts are commonly used fasteners in the mechanical field, widely applied in various mechanical equipment and building structures. However, in actual use, hex nuts are often exposed to humid, corrosive gases or liquids, making them prone to corrosion, which affects their performance and service life.

[0003] Currently, common rust prevention methods on the market have relatively thin electroplated layers with limited rust prevention capabilities. These layers are easily damaged in harsh environments, and they also increase the weight of the nut, making the surface less smooth and potentially affecting assembly accuracy. Furthermore, the rust prevention effect is unstable. Therefore, we propose a composite-coated rust-proof hexagonal nut to solve this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a composite coated rust-proof hexagonal nut to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A composite-coated rust-proof hexagonal nut includes a hexagonal nut body, a protective base plate fixedly installed at the bottom of the hexagonal nut body, a support frame fixedly installed on the outer side of the top of the protective base plate, a limiting telescopic rod fixedly installed at the bottom of the inner cavity of the support frame, a protective frame fixedly installed at the top of the limiting telescopic rod, a compression spring fixedly installed at the bottom of the inner cavity of the support frame, a bottom layer, an intermediate layer and a top layer respectively provided on the outer surface of the hexagonal nut body, the bottom layer covering the outer side of the hexagonal nut body, the intermediate layer covering the outer side of the bottom layer, and the top layer covering the outer side of the intermediate layer, and a threaded layer fixedly opened inside the hexagonal nut body.

[0007] Preferably, an anti-slip pad is fixedly installed on the bottom of the protective base plate, the top of the support frame extends into the interior of the protective frame, the top of the compression spring is fixedly connected to the top of the inner cavity of the protective frame, and the compression spring is sleeved on the outside of the limiting telescopic rod.

[0008] Preferably, the number of limiting telescopic rods is six, and they are arranged in a circular array. The outer side of the protective frame is in sliding contact with the outer surface of the hexagonal nut body, and the inner wall of the protective frame is in sliding contact with the outer side of the support frame.

[0009] Preferably, the bottom layer is a zinc-nickel alloy plating layer, prepared by electroplating, and the electroplating solution includes zinc chloride, nickel sulfate, ammonium chloride, etc.

[0010] Preferably, the intermediate layer is an epoxy resin coating, prepared by spraying, wherein the epoxy resin coating is uniformly sprayed onto the surface of the underlying layer.

[0011] Preferably, the surface layer is a polytetrafluoroethylene coating, prepared by spraying, wherein the polytetrafluoroethylene coating is uniformly sprayed onto the surface of the intermediate layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. In this utility model, a composite coating is formed by coating the outer surface of the hexagonal nut body with a zinc-nickel alloy plating, an epoxy resin coating, and a polytetrafluoroethylene coating. The coatings work together to greatly improve the rust resistance and service life of the hexagonal nut.

[0014] 2. In this utility model, by pressing the protective frame downwards, the protective frame causes the limiting telescopic rod to retract. When the limiting telescopic rod retracts, it causes the compression spring to retract, bringing the protective frame closer to the protective base plate. At the same time, the top of the outer side of the hexagonal nut body is exposed. Then, the hexagonal nut body can be twisted with a tool. This can protect the hexagonal nut body, prevent damage to the exterior of the hexagonal nut body, and improve the practicality of the device. Attached Figure Description

[0015] Figure 1 is a three-dimensional structural diagram of a composite-coated rust-proof hexagonal nut proposed in this utility model;

[0016] Figure 2 is an unfolded view of the protective frame of a composite coated rust-proof hexagonal nut proposed in this utility model;

[0017] Figure 3 is a cross-sectional view of a composite-coated rust-proof hexagonal nut proposed in this utility model;

[0018] Figure 4 is a magnified view of part A in Figure 2.

[0019] In the diagram: 1. Hexagonal nut body; 2. Protective base plate; 3. Support frame; 4. Protective frame; 5. Threaded layer; 6. Limiting telescopic rod; 7. Compression spring; 8. Bottom layer; 9. Middle layer; 10. Top layer; 11. Anti-slip pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Referring to Figures 1-4, a composite coated rust-proof hexagonal nut includes a hexagonal nut body 1, a protective base plate 2 fixedly installed at the bottom of the hexagonal nut body 1, a support frame 3 fixedly installed on the outer side of the top of the protective base plate 2, a limiting telescopic rod 6 fixedly installed at the bottom of the inner cavity of the support frame 3, a protective frame 4 fixedly installed at the top of the limiting telescopic rod 6, and a compression spring 7 fixedly installed at the bottom of the inner cavity of the support frame 3. The outer surface of the hexagonal nut body 1 is respectively provided with a bottom layer 8, an intermediate layer 9, and a top layer 10. The bottom layer 8 covers the outer side of the hexagonal nut body 1, the intermediate layer 9 covers the outer side of the bottom layer 8, and the top layer 10 covers the outer side of the intermediate layer 9. A threaded layer 5 is fixedly opened inside the hexagonal nut body 1.

[0022] In this embodiment, an anti-slip pad 11 is fixedly installed on the bottom of the protective base plate 2, the top of the support frame 3 extends into the interior of the protective frame 4, the top of the compression spring 7 is fixedly connected to the top of the inner cavity of the protective frame 4, the compression spring 7 is sleeved on the outside of the limiting telescopic rod 6, there are six sets of limiting telescopic rods 6, and they are arranged in a circular array. The outer side of the protective frame 4 is in sliding contact with the outer surface layer 10 of the hexagonal nut body 1, and the inner wall of the protective frame 4 is in sliding contact with the outer side of the support frame 3. The anti-slip pad 11 can increase the friction between the bottom of the hexagonal nut body 1 and the external device, thereby improving the stability of the hexagonal nut body 1. The elastic force of the compression spring 7 can limit the movement of the protective frame 4. The limiting telescopic rod 6 improves the stability of the vertical movement of the protective frame 4.

[0023] In this embodiment, the bottom layer 8 is a zinc-nickel alloy plating layer, prepared by electroplating. The electroplating solution includes zinc chloride, nickel sulfate, ammonium chloride, etc. The bottom layer 8 has good corrosion resistance and electrochemical protection, and can form a dense protective layer on the surface of the hexagonal nut body 1 to prevent the base metal from contacting external corrosive media. The middle layer 9 is an epoxy resin coating, prepared by spraying. The epoxy resin coating is evenly sprayed on the surface of the bottom layer 8. The epoxy resin coating of the middle layer 9 has excellent adhesion and chemical corrosion resistance, which can further enhance the protective performance of the composite coating. At the same time, it fills the small defects on the surface of the bottom layer 8 and improves the smoothness of the coating. The top layer 10 is a polytetrafluoroethylene coating, prepared by spraying. The polytetrafluoroethylene coating is evenly sprayed on the surface of the middle layer 9. The polytetrafluoroethylene coating of the top layer 10 has an extremely low coefficient of friction and good weather resistance, which can reduce the wear of the hexagonal nut body 1 during use, and prevent the adhesion of dust, oil and other substances, further improving the rust prevention effect.

[0024] In this embodiment, during use, by pressing the protective frame 4 downwards, the protective frame 4 causes the limiting telescopic rod 6 to retract. When the limiting telescopic rod 6 retracts, it causes the compression spring 7 to retract, making the protective frame 4 close to the protective base plate 2. At the same time, the top of the outer side of the hexagonal nut body 1 is exposed. Then, the hexagonal nut body 1 can be twisted using a tool.

[0025] The above provides a detailed description of the composite-coated rust-proof hexagonal nut provided by this utility model. Specific embodiments have been used to illustrate the principle and implementation of this utility model. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core idea of ​​this utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A composite-coated rust-proof hexagonal nut, comprising a hexagonal nut body (1), characterized in that: A protective base plate (2) is fixedly installed at the bottom of the hexagonal nut body (1). A support frame (3) is fixedly installed on the outer side of the top of the protective base plate (2). A limiting telescopic rod (6) is fixedly installed at the bottom of the inner cavity of the support frame (3). A protective frame (4) is fixedly installed at the top of the limiting telescopic rod (6). A compression spring (7) is fixedly installed at the bottom of the inner cavity of the support frame (3). A bottom layer (8), an intermediate layer (9), and a surface layer (10) are respectively provided on the outer surface of the hexagonal nut body (1). The bottom layer (8) covers the outer side of the hexagonal nut body (1). The intermediate layer (9) covers the outer side of the bottom layer (8). The surface layer (10) covers the outer side of the intermediate layer (9). A threaded layer (5) is fixedly opened inside the hexagonal nut body (1).

2. The composite-coated rust-proof hexagonal nut according to claim 1, characterized in that: The bottom of the protective base plate (2) is fixedly installed with an anti-slip pad (11), the top of the support frame (3) extends into the interior of the protective frame (4), the top of the compression spring (7) is fixedly connected to the top of the inner cavity of the protective frame (4), and the compression spring (7) is sleeved on the outside of the limiting telescopic rod (6).

3. The composite-coated rust-proof hexagonal nut according to claim 1, characterized in that: The number of the limiting telescopic rods (6) is six, and they are arranged in a ring array. The outer side of the protective frame (4) is in sliding contact with the outer surface layer (10) of the hexagonal nut body (1), and the inner wall of the protective frame (4) is in sliding contact with the outer side of the support frame (3).

4. The composite-coated rust-proof hexagonal nut according to claim 1, characterized in that: The bottom layer (8) is a zinc-nickel alloy plating.

5. The composite-coated rust-proof hexagonal nut according to claim 1, characterized in that: The intermediate layer (9) is an epoxy resin coating, which is prepared by spraying. The epoxy resin coating is uniformly sprayed onto the surface of the bottom layer (8).

6. The composite-coated rust-proof hexagonal nut according to claim 1, characterized in that: The surface layer (10) is a polytetrafluoroethylene coating, which is prepared by spraying. The polytetrafluoroethylene coating is uniformly sprayed onto the surface of the intermediate layer (9).

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