CN-224200945-U - Anti-loosening self-discharging corrosion-resistant bolt

Abstract

The utility model relates to the field of bolts, in particular to a locking self-discharging corrosion-resistant bolt. The utility model aims to solve the technical problem of providing the anti-loosening self-discharging corrosion-resistant bolt which can effectively protect the head of the bolt from environmental corrosion, provide continuous and reliable anti-loosening pretightening force and improve the reliability, durability and maintenance convenience of connection. A locking self-discharging corrosion-resistant bolt comprises a bolt rod and a bolt head integrally connected to one end of the bolt rod, wherein a threaded section is arranged at one end, far away from the bolt head, of the bolt rod, a protective cover is fixedly arranged on the outer diameter surface of the bolt head, and a protective cover fixedly connected with the protective cover is arranged on the end face, far away from one side of the bolt rod, of the bolt head. The utility model effectively protects the bolt head from environmental erosion, provides continuous and reliable anti-loosening pretightening force, and improves the reliability, durability and maintenance convenience of connection.

Inventors

• ZHANG HONG
• LI ZHONGYI
• WANG JIANQING
• ZHENG RUIWEN

Assignees

• 福建省昌隆机械制造有限公司

Dates

Publication Date

20260505

Application Date

20250625

Claims (5)

1. 1. The anti-loosening self-discharging corrosion-resistant bolt comprises a bolt rod (1), and a bolt head (2) integrally connected to one end of the bolt rod (1), wherein a thread section is arranged at one end, far away from the bolt head (2), of the bolt rod (1); The anti-theft bolt is characterized in that a protective cover (3) is fixedly arranged on the outer diameter surface of the bolt head (2), a protective cover (4) fixedly connected with the protective cover (3) is arranged on the end face, away from the bolt rod (1), of the bolt head (2), an inner hexagonal hole is formed in the center of the bolt head (2), a moving block (5) is arranged in the inner hexagonal hole in a sliding mode, a spring (6) is fixedly arranged between the inner hexagonal hole formed in the bolt head (2) and the moving block (5), a gasket (7) is further arranged at the joint of the bolt head (2) and the bolt rod (1), a ring groove is formed in the end face, close to the bolt head (2), of one side of the bolt rod (1), of the gasket (7), a protruding ring is arranged in the ring groove formed in the bolt head (2) in the sliding mode, and an elastic piece (8) is fixedly arranged between the ring groove formed in the bolt head (2) and the protruding ring formed in the gasket (7).
2. 2. The anti-loosening self-discharging corrosion-resistant bolt according to claim 1, wherein the shape of the inner hexagonal hole of the moving block (5) is the same as that of the inner hexagonal hole of the bolt head (2), and the moving block (5) is in clearance fit with the inner hexagonal hole of the bolt head (2).
3. 3. The anti-loosening self-discharging corrosion-resistant bolt according to claim 1, wherein the protective cover (4) is provided with a hexagonal through groove communicated with an inner hexagonal hole formed in the bolt head (2), and meanwhile the hexagonal through groove of the protective cover (4) is provided with a limiting protrusion used for limiting the moving block (5).
4. 4. The anti-loosening self-discharging corrosion-resistant bolt according to claim 1, wherein the protective cover (3), the protective cover (4) and the moving block (5) are made of corrosion-resistant plastic materials.
5. 5. A self-draining anti-loosening corrosion resistant bolt according to claim 1, wherein the elastic member (8) is elastic rubber.

Description

Anti-loosening self-discharging corrosion-resistant bolt Technical Field The utility model relates to the field of bolts, in particular to a locking self-discharging corrosion-resistant bolt. Background In the fields of mechanical engineering, building structures, ocean engineering, chemical equipment and the like, the bolt connection is widely applied due to reliability and detachability, however, the head of the bolt, particularly the exposed end face and the outer diameter surface of the traditional bolt and a standard inner hexagonal hole are extremely easy to erode by moisture, salt fog, chemical substances and sediment impurities in the environment in the long-term service process of the traditional bolt, so that the appearance is influenced, the mechanical performance of the bolt is weakened, rust death, difficult detachment and even fracture failure are caused, the service life is obviously shortened, the maintenance cost and the potential safety hazard are increased, and meanwhile, the inner hexagonal hole of the bolt is open and dust, sediment and corrosive substances are extremely easy to accumulate. In order to solve the problems, various anti-corrosion coatings and protective caps exist in the prior art, but the problems often exist that the anti-corrosion coatings can be worn and damaged in the use process, the protective caps are usually required to be additionally installed and are easy to lose in operation, and the inner hexagonal holes cannot be effectively protected, so that development of an anti-loosening self-discharging anti-corrosion bolt capable of effectively protecting the bolt heads from environmental corrosion, providing continuous and reliable anti-loosening pretightening force and improving the connection reliability, durability and maintenance convenience is needed. Disclosure of utility model The utility model aims to overcome the limitations of various anti-corrosion coatings, protective caps and other schemes in the prior art, and the anti-corrosion coatings are easy to be worn and damaged in the use process; the utility model aims to provide a locking self-discharging corrosion-resistant bolt which can effectively protect the head of the bolt from environmental corrosion, provide continuous and reliable locking pretightening force and improve the reliability, durability and maintenance convenience of connection. The utility model is achieved by the following specific technical means: The anti-loosening self-discharging corrosion-resistant bolt comprises a bolt rod, a bolt head and a bolt head, wherein the bolt head is integrally connected to one end of the bolt rod; The bolt head is characterized in that a protective cover is fixedly arranged on the outer diameter surface of the bolt head, a protective cover fixedly connected with the protective cover is arranged on the end face of one side, far away from the bolt rod, of the bolt head, an inner hexagonal hole is arranged in the center of the bolt head, a moving block is slidably arranged in the inner hexagonal hole, a spring is fixedly arranged between the inner hexagonal hole arranged in the bolt head and the moving block, a gasket is further arranged at the joint of the bolt head and the bolt rod, a ring groove is arranged on the end face of one side, close to the bolt head, of the bolt head, a protruding ring is arranged on the end face, close to the bolt head, of the gasket, and is slidably arranged in the ring groove arranged in the bolt head, and an elastic piece is fixedly arranged between the ring groove arranged in the bolt head and the protruding ring arranged on the gasket. Furthermore, the moving block has the same shape as the inner hexagonal hole arranged on the bolt head, and is in clearance fit with the inner hexagonal hole arranged on the bolt head, so that the moving block can slide smoothly in the inner hexagonal hole arranged on the bolt head. Furthermore, the hexagonal through groove used for communicating with the inner hexagonal hole arranged on the bolt head is formed in the protective cover, the installation and the disassembly of the bolt are facilitated, the protective cover does not need to be disassembled when the inner hexagonal wrench is used for installing and disassembling the bolt, meanwhile, the limit protrusion used for limiting the moving block is arranged on the hexagonal through groove of the protective cover, and the moving block is prevented from being separated from the inner hexagonal hole arranged on the bolt head. Furthermore, the protective cover and the moving block are made of corrosion-resistant plastic materials, so that the erosion of the protective cover, the protective cover and the moving block caused by external sediment impurities and sewage is prevented. Further, the elastic piece is elastic rubber. Compared with the prior art, the utility model has the following beneficial effects: The utility model effectively protects the bolt head from environmental erosion, pr