Safe anti-theft bolt

Abstract

The utility model discloses a safety type anti-theft bolt, which relates to the field of anti-theft bolts and comprises a bolt body consisting of a bolt rod part and a bolt head part which are integrally connected. The bolt rod part is provided with an external thread; the end face of the bolt head is a plane, and a special-shaped groove and a plurality of limiting grooves are formed in the end face of the bolt head. The special-shaped groove is located in the center of the end face of the bolt head, and the multiple limiting grooves are distributed around the special-shaped groove. The end face of the bolt head is connected with a protective cover, a plurality of limiting blocks are arranged at the end, facing the bolt head, of the protective cover, and the number and the positions of the limiting blocks correspond to those of the limiting grooves. The inner wall of the limiting groove is provided with a magnetic attraction piece which plays a role in attracting the limiting block, and the protective cover is connected with the end face of the head of the bolt in the mode that the limiting block is inserted into the limiting groove. According to the safety type anti-theft bolt, the special-shaped groove is formed in the head of the bolt to prevent the bolt from being easily unscrewed and detached, and the special protective cover is arranged on the special-shaped groove to achieve the anti-theft effect.

Description

Technical Field

[0001] This utility model relates to the field of anti-theft bolts, and in particular to a safe anti-theft bolt. Background Technology

[0002] Bolts are commonly used fasteners in daily life and industrial production, widely applied in various equipment and facilities. However, due to their simple structure, ordinary bolts are easily unscrewed with disassembly tools, posing a risk of theft to facilities installed in public areas, parts on vehicles, or valuable equipment. For example, bolts on public facilities such as outdoor streetlights and traffic signs are often removed by criminals, causing damage; easily removed wheel bolts on vehicles can seriously threaten driving safety. Although existing anti-theft bolts have some technical solutions, such as using specially shaped heads and incorporating anti-tamper structures, these solutions have some problems. Some anti-theft structures are complex, making installation and disassembly difficult, while others are not effective in preventing theft and cannot effectively resist professional disassembly tools. Therefore, there is an urgent need for a safer, more reliable, and easier-to-install security anti-theft bolt. Utility Model Content

[0003] To address the aforementioned technical problems, this utility model provides a secure anti-theft bolt that uses a shaped groove to prevent the bolt from being easily loosened. A special protective cover is provided for the shaped groove to prevent it from being contaminated or corroded, thus preventing damage.

[0004] The technical solution adopted by this utility model to solve its technical problem is as follows: a security anti-theft bolt, including a bolt body, which is composed of an integrally connected bolt shank and bolt head; the bolt shank is provided with external threads; the end face of the bolt head is flat, and the end face of the bolt head is provided with a special-shaped groove and multiple limiting grooves; the special-shaped groove is located in the center of the end face of the bolt head, and the multiple limiting grooves are distributed around the special-shaped groove; the end face of the bolt head is connected to a protective cover, and the end of the protective cover facing the bolt head is provided with multiple limiting blocks, the number and position of which correspond to the limiting grooves; the inner wall of the limiting groove is provided with magnetic suction pieces that attract the limiting blocks, and the protective cover is connected to the end face of the bolt head by inserting the limiting blocks into the limiting grooves; the protective cover is generally disc-shaped, and the head end of the protective cover is arc-shaped; the side of the bolt head and the side of the protective cover are matching arc-shaped bevels.

[0005] The irregular hexagonal groove has different lengths and included angles on its six sides, requiring a special tool with a matching shape to be inserted and tightened, thus ensuring the safety of the bolt.

[0006] Compared with the prior art, the beneficial effects of this utility model are: the security anti-theft bolt has a special groove on the bolt head to prevent the bolt from being easily loosened and removed, and a special protective cover is provided for the special groove. The protective cover is connected to the bolt head by magnetic attraction, and the bolt head and the side of the protective cover are set as smooth arc bevels that match each other. The head end of the protective cover is set as a smooth arc shape, making it difficult for ordinary tools to clamp and disassemble the protective cover and the bolt head, thus playing an anti-theft role. Attached Figure Description

[0007] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This is an exploded view of the structure of this utility model;

[0010] Figure 3 This is a cross-sectional view of the bolt head.

[0011] The diagram shows: 1. Bolt shank, 2. Bolt head, 3. External thread, 4. Irregular groove, 5. Limiting groove, 6. Protective cover, 7. Limiting block, 8. Magnetic plate. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0013] Reference Figure 1-3This embodiment provides a security anti-theft bolt, including a bolt body, which is composed of an integrally connected bolt shank 1 and bolt head 2; the bolt shank 1 is provided with external threads 3; the end face of the bolt head 2 is flat, and the end face of the bolt head 2 is provided with a shaped groove 4 and two limiting grooves 5; the shaped groove 4 is located in the center of the end face of the bolt head 2, and the two limiting grooves 5 are distributed on the left and right sides of the shaped groove 4; the end face of the bolt head 2 is connected to a protective cover 6, and the end of the protective cover 6 facing the bolt head 2 is provided with two limiting blocks 7, the positions of the two limiting blocks 7 corresponding to the two limiting grooves 5; the inner wall of the limiting groove 5 is provided with a magnetic suction piece 8 that attracts the limiting blocks 7, and the protective cover 6 is connected to the end face of the bolt head 2 by inserting the limiting blocks 7 into the limiting grooves 5; the protective cover 6 is generally disc-shaped, and the head end of the protective cover 6 is arc-shaped; the side of the bolt head 2 and the side of the protective cover 6 are matching arc-shaped bevels.

[0014] In this embodiment, the irregular hexagonal groove 4 is not compatible with conventional wrenches and requires a special tool with a matching shape to be inserted and tightened, thus ensuring the safety of the bolt.

[0015] When installing the anti-theft bolt, first insert the bolt shank 1 into the hole to be assembled, then use a special tool to insert into the irregular groove 4 and tighten it; then insert the limiting block 7 into the limiting groove 5 so that the magnetic suction plate 8 attracts and fixes the limiting block 7, thereby making the protective cover 6 fastened to the bolt head 2.

[0016] When disassembling the anti-theft bolt, first use a strong suction cup to contact and attract the end face of the protective cover 6, then pull it outward to make the limiting block 7 overcome the attraction of the magnetic plate 8 and pull it out of the limiting groove 5, thereby separating the protective cover 6 from the bolt head 2, exposing the irregular groove 4, and then use a special tool to insert into the irregular groove 4 and screw it to loosen and disassemble the bolt shank 1.

[0017] Of course, the above description is not limited to the examples above. Technical features of this utility model not described can be implemented by or using existing technology, and will not be repeated here. The above embodiments and drawings are only used to illustrate the technical solution of this utility model and are not intended to limit this utility model. This utility model has been described in detail with reference to preferred embodiments. Those skilled in the art should understand that any changes, modifications, additions or substitutions made by those skilled in the art within the scope of this utility model do not depart from the spirit of this utility model and should also fall within the protection scope of the claims of this utility model.

Claims

1. A security anti-theft bolt, comprising a bolt body, the bolt body being composed of an integrally connected bolt shank (1) and bolt head (2); the bolt shank (1) being provided with external threads (3); the end face of the bolt head (2) being a plane, characterized in that, The end face of the bolt head (2) is provided with a shaped groove (4) and multiple limiting grooves (5); the shaped groove (4) is located in the center of the end face of the bolt head (2), and multiple limiting grooves (5) are distributed around the shaped groove (4); the end face of the bolt head (2) is connected to a protective cover (6), and the end of the protective cover (6) facing the bolt head (2) is provided with multiple limiting blocks (7), the number and position of the limiting blocks (7) correspond to the limiting grooves (5); the inner wall of the limiting grooves (5) is provided with magnetic suction pieces (8) that attract the limiting blocks (7), and the protective cover (6) is connected to the end face of the bolt head (2) by inserting the limiting blocks (7) into the limiting grooves (5); the protective cover (6) is generally disc-shaped, and the head end of the protective cover (6) is arc-shaped; the side of the bolt head (2) and the side of the protective cover (6) are matching arc-shaped slopes.

2. The security anti-theft bolt according to claim 1, characterized in that, The irregular hexagonal groove (4) is an irregular hexagonal groove.

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