Anti-loose self-discharging corrosion-resistant bolt

Abstract

The utility model relates to the field of bolts, in particular to an anti-loose self-discharging corrosion-resistant bolt. The technical problem to be solved by the utility model is to provide the anti-loose self-discharging corrosion-resistant bolt which can effectively protect the head of the bolt from environmental erosion, simultaneously provide continuous and reliable anti-loose pre-tightening force and improve the reliability, durability and maintenance convenience of connection. An anti-loose self-discharging corrosion-resistant bolt comprises a bolt rod and a bolt head integrally connected to one end of the bolt rod. A threaded section is arranged at the end, away from the bolt head, of the bolt rod. The outer diameter surface of the bolt head is fixedly covered with a protective cover. A protective cover fixedly connected with the protective cover is arranged on the end face of the side, away from the bolt rod, of the bolt head. The anti-loose bolt has the advantages that the head of the bolt is effectively protected against environmental erosion, meanwhile, continuous and reliable anti-loose pre-tightening force is provided, and connection reliability, durability and maintenance convenience are improved.

Description

Technical Field

[0001] This utility model relates to the field of bolts, and in particular to a self-locking, corrosion-resistant bolt that prevents loosening. Background Technology

[0002] In many fields such as mechanical engineering, building structures, marine engineering, and chemical equipment, bolted connections are widely used due to their reliability and ease of disassembly. However, during long-term service, the bolt head, especially the exposed end face and outer diameter surface, as well as the standard internal hexagonal hole, are highly susceptible to corrosion from moisture, salt spray, chemicals, and sediment in the environment. This not only affects the appearance but also weakens the mechanical properties of the bolt, leading to rusting, difficulty in disassembly, or even breakage and failure, significantly shortening the service life and increasing maintenance costs and safety hazards. At the same time, the internal hexagonal hole of the bolt is open, making it very easy for dust, sediment, and corrosive substances to accumulate. These contaminants can hinder the proper insertion and engagement of the wrench, leading to difficulties in disassembly and even damage to the wrench or bolt head. To address these issues, while various anti-corrosion coatings and protective caps exist in the existing technology, they often have limitations: the anti-corrosion coating may be worn away during use; the protective cap usually requires additional installation and disassembly during operation, is easily lost, and cannot effectively protect the internal hexagonal hole itself. Therefore, there is an urgent need to develop a self-cleaning corrosion-resistant anti-loosening bolt that can effectively protect the bolt head from environmental corrosion, while providing a continuous and reliable anti-loosening preload, improving the reliability, durability, and ease of maintenance of the connection. Utility Model Content

[0003] To overcome the limitations of existing anti-corrosion coatings and protective caps, such as the ease with which anti-corrosion coatings are worn and damaged during use, and the tendency for protective caps to be disassembled and lost during operation, this invention aims to provide a self-cleaning corrosion-resistant anti-loosening bolt that effectively protects the bolt head from environmental corrosion while providing a continuous and reliable anti-loosening preload, thereby improving the reliability, durability, and ease of maintenance of the connection.

[0004] This utility model is achieved by the following specific technical means:

[0005] A self-locking corrosion-resistant anti-loosening bolt includes a bolt shank and a bolt head integrally connected to one end of the bolt shank; the bolt shank has a threaded section at the end away from the bolt head.

[0006] A protective cover is fixedly provided on the outer diameter surface of the bolt head; a protective cap is provided on the end face of the bolt head away from the bolt shank, which is fixedly connected to the protective cover; an internal hexagonal hole is provided in the center of the bolt head, and a moving block is slidably provided in the internal hexagonal hole; a spring is also fixedly provided between the internal hexagonal hole of the bolt head and the moving block; a washer is also provided at the connection between the bolt head and the bolt shank, and an annular groove is provided on the end face of the bolt head near the bolt shank, and a protruding ring is provided on the end face of the washer near the bolt head, and the protruding ring of the washer is slidably provided in the annular groove of the bolt head; an elastic element is also fixedly provided between the annular groove of the bolt head and the protruding ring of the washer.

[0007] Furthermore, the movable block has the same shape as the internal hexagonal hole in the bolt head, and the movable block and the internal hexagonal hole in the bolt head are in clearance fit; this facilitates smooth sliding of the movable block within the internal hexagonal hole in the bolt head.

[0008] Furthermore, the protective cover is provided with a hexagonal through groove for communicating with the internal hexagonal hole of the bolt head; this facilitates the installation and removal of the bolt, and when using an internal hexagonal wrench to install and remove the bolt, it is not necessary to remove the protective cover; at the same time, the hexagonal through groove of the protective cover is provided with a limiting protrusion for limiting the movement block; this prevents the movement block from detaching from the internal hexagonal hole of the bolt head.

[0009] Furthermore, the protective cover, protective cap, and movable block are made of corrosion-resistant plastic material to prevent external mud, sand, impurities, and sewage from corroding the protective cover, protective cap, and movable block.

[0010] Furthermore, the elastic element is elastic rubber.

[0011] Compared with the prior art, the present invention has the following beneficial effects:

[0012] This invention effectively protects the bolt head from environmental corrosion while providing a continuous and reliable anti-loosening preload, thereby improving the reliability, durability, and ease of maintenance of the connection.

[0013] The bolt head is protected by multiple layers of sealing, including protective covers, movable blocks, and springs, to prevent external sewage and impurities from corroding the bolt. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0016] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0017] The markings in the attached diagram are: 1-bolt rod, 2-bolt head, 3-protective cover, 4-protective cap, 5-moving block, 6-spring, 7-washer, 8-elastic element. Detailed Implementation

[0018] The present invention will be further described below with reference to the accompanying drawings: Example

[0019] A type of anti-loosening, self-draining, corrosion-resistant bolt, such as Figure 1-3 As shown, it includes a bolt rod 1 and a bolt head 2 integrally connected to one end of the bolt rod 1; the bolt rod 1 has a threaded section at the end away from the bolt head 2;

[0020] A protective cover 3 is fixedly provided on the outer diameter surface of the bolt head 2; a protective cover 4 is provided on the end face of the bolt head 2 away from the bolt rod 1, which is fixedly connected to the protective cover 3; an internal hexagonal hole is provided in the center of the bolt head 2, and a moving block 5 is slidably provided in the internal hexagonal hole; a spring 6 is also fixedly provided between the internal hexagonal hole of the bolt head 2 and the moving block 5; a washer 7 is also provided at the connection between the bolt head 2 and the bolt rod 1; an annular groove is provided on the end face of the bolt head 2 near the bolt rod 1; a protruding ring is provided on the end face of the washer 7 near the bolt head 2; the protruding ring of the washer 7 is slidably provided in the annular groove of the bolt head 2; an elastic element 8 is also fixedly provided between the annular groove of the bolt head 2 and the protruding ring of the washer 7.

[0021] Working principle:

[0022] This utility model relates to a bolt, in which a protective structure is fixedly fitted on the outside of the bolt head 2 for rust and corrosion protection. The protective structure includes a protective cover 3 fixedly mounted on the outer diameter surface of the bolt head 2, protecting the outer diameter surface of the bolt head 2. Simultaneously, a protective cap 4, fixedly connected to the protective cover 3, is provided on the end face of the bolt head 2 away from the bolt shank 1. The protective cap 4 protects the end face of the bolt head 2, preventing external mud, sand, impurities, and sewage from corroding the bolt head 2. Furthermore, an internal hexagonal hole is provided at the center of the bolt head 2, and a movable block 5 is slidably mounted within the internal hexagonal hole. A spring 6 is fixedly installed between the hexagonal socket of the bolt head 2 and the movable block 5. The protective cover 4 is provided with a hexagonal through groove for communicating with the hexagonal socket of the bolt head 2. When installing or removing the bolt, the hexagonal wrench presses the movable block 5, causing the movable block 5 to move inward under the pressure of the hexagonal wrench, so that the hexagonal wrench can be inserted into the hexagonal socket of the bolt head 2. Then, the hexagonal wrench is rotated to rotate and remove or install the bolt. When not installing or removing, the spring 6 pushes the movable block 5 to move outward, and the movable block 5 presses against the protective cover 4 to prevent external mud and sewage from entering the hexagonal socket of the bolt head 2 and causing corrosion to the bolt head 2.

[0023] Meanwhile, a washer 7 is also provided at the connection between the bolt head 2 and the bolt shank 1. One end of the bolt head 2 has an annular groove, and one end of the washer 7 has a protruding ring. The protruding ring of the washer 7 is slidably disposed in the annular groove of the bolt head 2. An elastic element 8 is also fixedly disposed between the annular groove of the bolt head 2 and the protruding ring of the washer 7. By the washer 7 pressing the elastic element 8, the elastic element 8 generates a force that pushes the bolt head 2 outward, pre-tightening the bolt, making the thread on the bolt shank 1 more tightly fitted with the thread of the mounting hole, preventing the bolt from loosening due to vibration, and increasing the installation tightness of the bolt.

[0024] The bolt head 2 is protected by multiple layers of sealing through the protective cover 3, protective cap 4, moving block 5, and spring 6, preventing external sewage impurities from causing corrosion to the bolt.

[0025] Although this disclosure has been described in detail with reference to exemplary embodiments, it is not limited thereto, and it will be apparent to those skilled in the art that various modifications and changes may be made thereto without departing from the scope of this disclosure.

Claims

1. A self-draining corrosion-resistant anti-loosening bolt, comprising a bolt shank (1) and a bolt head (2) integrally connected to one end of the bolt shank (1); the bolt shank (1) is provided with a threaded section at the end away from the bolt head (2); Its features are, A protective cover (3) is fixedly provided on the outer diameter surface of the bolt head (2); a protective cover (4) is provided on the end face of the bolt head (2) away from the bolt rod (1) and is fixedly connected to the protective cover (3); an internal hexagonal hole is provided in the center of the bolt head (2), and a moving block (5) is slidably provided in the internal hexagonal hole; a spring (6) is also fixedly provided between the internal hexagonal hole of the bolt head (2) and the moving block (5); a washer (7) is also provided at the connection between the bolt head (2) and the bolt rod (1); an annular groove is provided on the end face of the bolt head (2) near the bolt rod (1), and a protruding ring is provided on the end face of the washer (7) near the bolt head (2), and the protruding ring of the washer (7) is slidably provided in the annular groove of the bolt head (2); an elastic element (8) is also fixedly provided between the annular groove of the bolt head (2) and the protruding ring of the washer (7).

2. The anti-loosening self-draining corrosion-resistant bolt according to claim 1, characterized in that, The movable block (5) and the bolt head (2) have the same shape of internal hexagonal hole, and the movable block (5) and the bolt head (2) are in clearance fit.

3. The anti-loosening self-draining corrosion-resistant bolt according to claim 1, characterized in that, The protective cover (4) is provided with a hexagonal through groove for communicating with the hexagonal hole provided in the bolt head (2); at the same time, the hexagonal through groove of the protective cover (4) is provided with a limiting protrusion for limiting the movement block (5).

4. The anti-loosening self-draining corrosion-resistant bolt according to claim 1, characterized in that, The protective cover (3), protective cover (4) and moving block (5) are made of corrosion-resistant plastic material.

5. The anti-loosening self-draining corrosion-resistant bolt according to claim 1, characterized in that, The elastic element (8) is made of elastic rubber.

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