High-strength corrosion-resistant bolt

Abstract

The high-strength corrosion-resistant bolt comprises a bolt head part, a bolt rod part, a protective cover, a cross-shaped groove, a cross-shaped convex groove and a corrosion-resistant structure, the bolt rod part is connected to the lower end of the bolt head part, the detachable protective cover is arranged at the upper end of the bolt head part, the cross-shaped groove is formed in the center of the upper end of the bolt head part, and the cross-shaped convex groove is arranged in the cross-shaped groove. A cross-shaped groove is formed in the lower end of the bolt rod part, a cross-shaped convex groove matched with the cross-shaped groove is formed in the lower end of the protective cover, the bolt head part and the protective cover are installed in a clamped mode through the cross-shaped groove and the cross-shaped convex groove, the bolt rod part is sleeved with an anti-corrosion structure used for preventing corrosion, and clamping grooves matched with the clamping blocks are formed in the two sides of the lower end of the bolt head part. The anti-corrosion sleeve is clamped in the clamping groove through the clamping block to be connected with the head of the bolt. The anti-corrosion bolt can not be rusted when used in different environments, and water can be drained in time through the drainage groove.

Description

[Technical field]

[0001] The utility model relates to the technical field of bolts, in particular to the technical field of high-strength corrosion-resistant bolts. [Background technology]

[0002] A bolt is a mechanical part, a cylindrical threaded fastener equipped with a nut. It is a type of fastener consisting of a head and a cylindrical body with external threads on the screw rod. It needs to be matched with a nut to fasten and connect two parts with through holes. This type of connection is called a bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection. At present, during the use of traditional bolts, cracks are prone to appear at the connection between the bolt rod and the bolt head, resulting in a shortened service life of the bolt. At the same time, during the use of traditional bolts, due to design reasons, the stress-bearing part is mainly at the connection between the bolt head and the bolt rod, which leads to cracks at the connection between the bolt rod and the bolt head, and the overall strength of the bolt is not high.

[0003] To solve the problems in the background technology, as disclosed in announcement number CN205715179U, a high-strength bolt is designed with a reinforcement part, and the diameter of the reinforcement part is larger than the diameter of the threaded section, and the ratio of the length of the threaded section to the length of the reinforcement part is 6-7, so that during the use of the bolt, the main force is applied to the reinforcement part, rather than between the traditional bolt rod and the bolt head, thereby effectively preventing the occurrence of cracks between the bolt rod and the force-bearing part during use. The connection between the bolt head and the reinforcement part is provided with an annular first transition arc surface, which effectively increases the surface stress at the connection between the bolt head and the reinforcement part, thereby enhancing the structural strength of the connection between the bolt head and the reinforcement part. However, this structure still has the following deficiencies:

[0004] 1. Because the bolts are exposed to the outdoors for a long time during use and are affected by external environmental factors, the surface of the bolts is easily corroded, making it difficult to twist and remove the bolts.

[0005] 2. Due to the small gap between the bolt and the connecting part, it is difficult to discharge the moisture in the gap. After a long time, rust is likely to form, causing the strength of the bolt itself to decrease and loosen. [Contents of the utility model]

[0006] The purpose of the utility model is to solve the problems in the prior art and to provide a high-strength corrosion-resistant bolt that will not be rusted when used in different environments and has a drainage groove that can drain moisture in time.

[0007] To achieve the above-mentioned objectives, the utility model proposes a high-strength corrosion-resistant bolt, comprising a bolt head, a bolt rod, a protective cover, a cross groove, a cross convex groove, and an anti-corrosion structure. The lower end of the bolt head is connected to the bolt rod, and a removable protective cover is provided at the upper end of the bolt head. A cross groove is opened at the center position of the upper end of the bolt head, and a cross convex groove matched with the cross groove is provided at the lower end of the protective cover. The bolt head and the protective cover are clamped and installed by the cross groove and the cross convex groove, and the outer sleeve of the bolt rod is provided with an anti-corrosion structure for corrosion prevention.

[0008] Preferably, the anti-corrosion structure includes an anti-corrosion sleeve, a mounting ring, and a clamping block. The anti-corrosion sleeve adopts a retractable anti-corrosion protective sleeve. A mounting ring is provided at the upper end of the anti-corrosion sleeve. A clamping block is symmetrically provided at the upper end of the mounting ring. The end of the clamping block is a triangular structure. The anti-corrosion sleeve is a hollow cylindrical structure, and the diameter inside the anti-corrosion sleeve is the same as the diameter of the bolt rod.

[0009] Preferably, both sides of the lower end of the bolt head are provided with clamping grooves matching with the clamping blocks, and the anti-corrosion sleeve is clamped in the clamping grooves through the clamping blocks to form a connection with the bolt head.

[0010] Preferably, the outer surface of the bolt head is coated with a wear-resistant coating.

[0011] Preferably, first drainage grooves for drainage are symmetrically provided on both sides of the exterior of the bolt shank, and the groove walls of the first drainage grooves are coated with a first anti-rust layer.

[0012] Preferably, second drainage grooves are symmetrically provided on both sides of the exterior of the bolt head, the groove walls of the second drainage grooves are coated with a second anti-rust layer, and the second drainage grooves are used in conjunction with the first drainage grooves.

[0013] Beneficial effects of the utility model:

[0014] 1. The utility model can improve the overall anti-corrosion effect of the bolt through the coordinated use of the anti-corrosion structure and the wear-resistant coating. After the bolt is installed, the clamping block is pulled upward, and the clamping block drives the anti-corrosion sleeve to expand and contract upward until the clamping block is clamped into the clamping groove at the lower end of the bolt head, so that the anti-corrosion sleeve wraps and protects the bolt rod, reduces the contact between the surface of the bolt rod and the external air or moisture, thereby reducing the probability of rust, and can protect the surface of the bolt head through the wear-resistant coating, thereby extending the overall service life of the bolt.

[0015] 2. The utility model can drain the moisture in the gap between the bolt and the connecting piece through the coordinated use of the first drainage groove and the second drainage groove. The moisture will first flow from the second drainage groove on the bolt head into the first drainage groove on the bolt rod and then be discharged outward, thereby preventing the moisture from staying in the gap between the bolt and the connecting piece, reducing the probability of rust spots, and improving the overall strength of the bolt.

[0016] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0017] Figure 1 This is a front view of a high-strength corrosion-resistant bolt of the utility model;

[0018] Figure 2 It is a cross-sectional view of a high-strength corrosion-resistant bolt of the utility model;

[0019] Figure 3 It is a cross-sectional view of the bolt head of a high-strength corrosion-resistant bolt of the utility model;

[0020] Figure 4 It is an exploded view of a high-strength corrosion-resistant bolt of the utility model;

[0021] In the figure: 1-bolt head, 2-bolt rod, 3-protective cover, 4-cross groove, 5-cross convex groove, 6-anti-corrosion structure, 61-anti-corrosion sleeve, 62-mounting ring, 63-clamping block, 7-clamping groove, 8-wear-resistant coating, 9-first drainage groove, 10-first anti-rust layer, 11-second drainage groove, 12-second anti-rust layer. [Specific implementation method]

[0022] See also Figure 1 The utility model discloses a high-strength corrosion-resistant bolt, comprising a bolt head 1, a bolt shank 2, a protective cover 3, a cross groove 4, a cross convex groove 5, and an anti-corrosion structure 6. The lower end of the bolt head 1 is connected to the bolt shank 2, and a detachable protective cover 3 is provided on the upper end of the bolt head 1. A cross groove 4 is provided at the center position of the upper end of the bolt head 1, and a cross convex groove 5 matched with the cross groove 4 is provided on the lower end of the protective cover 3. The bolt head 1 and the protective cover 3 are clamped and installed through the cross groove 4 and the cross convex groove 5. The outer sleeve of the bolt shank 2 is provided with an anti-corrosion structure 6 for anti-corrosion. By providing the protective cover 3, the bolt head 1 can be further protected to prevent moisture from flowing into the cross groove 4.

[0023] See also Figure 2The utility model discloses a high-strength corrosion-resistant bolt. The anti-corrosion structure 6 includes an anti-corrosion sleeve 61, a mounting ring 62, and a clamping block 63. The anti-corrosion sleeve 61 adopts a retractable anti-corrosion protective sleeve. The upper end of the anti-corrosion sleeve 61 is provided with a mounting ring 62. The upper end of the mounting ring 62 is symmetrically provided with a clamping block 63. The end of the clamping block 63 is a triangular structure. The anti-corrosion sleeve 61 is a hollow cylindrical structure, and the diameter of the inner part of the anti-corrosion sleeve 61 is the same as the diameter of the bolt rod 2. The lower end of the bolt head 1 There are clamping grooves 7 on both sides that match the clamping blocks 63. The anti-corrosion sleeve 61 is clamped in the clamping grooves 7 through the clamping blocks 63 to form a connection with the bolt head 1. When the bolt is installed, the clamping block 63 is pulled upward, and the clamping block 63 drives the anti-corrosion sleeve 61 to expand and contract upward until the clamping block 63 is clamped into the clamping groove 7 at the lower end of the bolt head 1, so that the anti-corrosion sleeve 61 wraps and protects the bolt rod 2, reduces the contact between the surface of the bolt rod 2 and the external air or moisture, and thus reduces the probability of rust.

[0024] See also Figure 3 The utility model discloses a high-strength corrosion-resistant bolt. The outer surface of the bolt head 1 is coated with a wear-resistant coating 8. The wear-resistant coating 8 can protect the surface of the bolt head 1, thereby extending the service life of the entire bolt. The wear-resistant coating 8 is a carbide coating.

[0025] See also Figure 4 The utility model discloses a high-strength corrosion-resistant bolt, wherein first drainage grooves 9 for drainage are symmetrically provided on both sides of the outside of the bolt shank 2, and the groove walls of the first drainage grooves 9 are coated with a first anti-rust layer 10, and second drainage grooves 11 are symmetrically provided on both sides of the outside of the bolt head 1, and the groove walls of the second drainage grooves 11 are coated with a second anti-rust layer 12, and the second drainage grooves 11 are used in conjunction with the first drainage grooves 9. Through the coordinated use of the first drainage grooves 9 and the second drainage grooves 11, moisture in the gap between the bolt and the connecting member can be discharged, and the moisture will first flow from the second drainage grooves 11 on the bolt head 1 into the first drainage grooves 9 of the bolt shank 2 and be discharged outward, thereby avoiding moisture staying in the gap between the bolt and the connecting member, reducing the probability of rust spots, and improving the overall strength of the bolt, and the first anti-rust layer 10 and the second anti-rust layer 12 are both made of silicone anti-rust paint.

[0026] Working process of this utility model:

[0027] During the working process of the high-strength corrosion-resistant bolt of the utility model, a tool is first used to insert it into the cross groove 4, and then it is rotated and installed. When the bolt is installed, the clamping block 63 is pulled upward, and the clamping block 63 drives the anti-corrosion sleeve 61 to expand and contract upward until the clamping block 63 is clamped into the clamping groove 7 at the lower end of the bolt head 1, so that the anti-corrosion sleeve 61 forms a wrapping protection for the bolt rod 2, reducing the contact between the surface of the bolt rod 2 and the external air or moisture, thereby reducing the probability of rust. By setting the wear-resistant coating 8, the surface of the bolt head 1 can be protected, thereby extending the service life of the entire bolt. Through the coordinated use of the first drainage groove 9 and the second drainage groove 11, the moisture in the gap between the bolt and the connecting piece can be discharged. The moisture will first flow from the second drainage groove 11 on the bolt head 1 into the first drainage groove 9 of the bolt rod 2 and be discharged outward, thereby avoiding moisture staying in the gap between the bolt and the connecting piece, reducing the probability of rust spots, and improving the overall strength of the bolt.

[0028] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A high-strength corrosion-resistant bolt, characterized in that: The invention comprises a bolt head (1), a bolt shank (2), a protective cover (3), a cross groove (4), a cross convex groove (5), and an anti-corrosion structure (6); the lower end of the bolt head (1) is connected to the bolt shank (2); the upper end of the bolt head (1) is provided with a detachable protective cover (3); a cross groove (4) is provided at the center of the upper end of the bolt head (1); the lower end of the protective cover (3) is provided with a cross convex groove (5) matched with the cross groove (4); the bolt head (1) and the protective cover (3) are mounted by clamping the cross groove (4) and the cross convex groove (5); and the outer part of the bolt shank (2) is provided with an anti-corrosion structure (6) for preventing corrosion.

2. A high-strength corrosion-resistant bolt according to claim 1, characterized in that: The anti-corrosion structure (6) comprises an anti-corrosion sleeve (61), a mounting ring (62), and a clamping block (63). The anti-corrosion sleeve (61) is a retractable anti-corrosion protective sleeve. The upper end of the anti-corrosion sleeve (61) is provided with a mounting ring (62). The upper end of the mounting ring (62) is symmetrically provided with a clamping block (63). The end of the clamping block (63) is a triangular structure. The anti-corrosion sleeve (61) is a hollow cylindrical structure, and the diameter of the interior of the anti-corrosion sleeve (61) is the same as the diameter of the bolt rod (2).

3. A high-strength corrosion-resistant bolt according to claim 2, characterized in that: The lower end of the bolt head (1) is provided with engaging grooves (7) matched with the engaging blocks (63) on both sides, and the anti-corrosion sleeve (61) is engaged in the engaging grooves (7) through the engaging blocks (63) to form a connection with the bolt head (1).

4. A high-strength corrosion-resistant bolt according to claim 1, characterized in that: The outer surface of the bolt head (1) is coated with a wear-resistant coating (8).

5. The high-strength corrosion-resistant bolt according to claim 1, characterized in that: First drainage grooves (9) for drainage are symmetrically provided on both sides of the outside of the bolt shank (2), and the groove walls of the first drainage grooves (9) are coated with a first rust-proof layer (10).

6. A high-strength corrosion-resistant bolt according to any one of claims 1 to 5, characterized in that: Second drainage grooves (11) are symmetrically provided on both sides of the outside of the bolt head (1), the groove walls of the second drainage grooves (11) are coated with a second anti-rust layer (12), and the second drainage grooves (11) are used in conjunction with the first drainage grooves (9).

Images