Anti-theft bolt

Abstract

The utility model relates to the technical field of anti-theft bolts and discloses an anti-theft bolt which comprises a screw rod and a nut, the outer surface of the screw rod is in threaded connection with the nut, one end of the screw rod is fixedly provided with an anti-theft assembly, and the anti-theft end of the anti-theft assembly is arranged at one end of the screw rod. The anti-theft function is achieved at one end of the screw rod through the anti-theft assembly, the cylindrical block capable of freely rotating is arranged in the bolt head, a special-shaped hole in the cylindrical block needs to be matched with a special tool to be screwed, a common tool cannot be clamped into the special-shaped hole or apply torque, and the cylindrical block rotates relative to the bolt head through the bearing. The limiting plate on the outer wall of the cylindrical block is matched with the protruding block on the inner wall of the bolt head, during clockwise screwing, the limiting plate abuts against the abutting block to transmit torque, and during anticlockwise disassembling, the arc-shaped face enables the limiting plate to slip, the cylindrical block idles and cannot transmit opposite force, the effect of preventing violent disassembling is achieved, and the anti-theft effect is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-theft bolts, in particular to an anti-theft bolt. Background Art

[0002] A bolt is a cylindrical threaded fastener consisting of a head and a cylinder with external threads. It must be used with a nut. It is used in conjunction with the nut to fasten two parts with through holes. This type of connection allows the nut to be unscrewed from the bolt to separate the two parts, which is a detachable connection.

[0003] Traditional anti-theft bolts usually use special-shaped bolt heads. Some special-shaped bolt head structures can still be disassembled through modified tools or violent destruction, and can still transmit torque when rotated counterclockwise, making it difficult to effectively prevent violent disassembly, resulting in relatively poor anti-theft effect. Utility Model Content

[0004] The purpose of the utility model is to provide an anti-theft bolt, which solves the problem that traditional anti-theft bolts usually use special-shaped bolt heads, some of which can still be disassembled by modified tools or violent destruction, and can still transmit torque when rotated counterclockwise, making it difficult to effectively prevent violent disassembly, thereby resulting in relatively poor anti-theft effect.

[0005] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0006] The utility model is an anti-theft bolt, comprising a screw rod and a nut. The outer surface of the screw rod is threadedly connected with the nut. An anti-theft component is fixedly installed at one end of the screw rod, and the anti-theft end of the anti-theft component is arranged at one end of the screw rod.

[0007] Furthermore, the anti-theft component includes a bolt head, the bolt head is fixedly mounted on one end of the screw rod, a mounting groove is fixedly mounted inside the bolt head, a bearing is mounted on the inner surface of the mounting groove, and a cylindrical block is mounted on the inner wall of the bearing;

[0008] Furthermore, a special-shaped hole is opened inside the cylindrical block, and a limit plate is fixedly installed on the outer surface of the cylindrical block. The number of the limit plates is fixed at two, and the limit plates are relatively distributed on the outer surface of the cylindrical block.

[0009] Furthermore, a protrusion is fixedly mounted on the outer surface of the bolt head, the number of the protrusions is fixed at two, and the protrusions are relatively distributed on the outer surface of the bolt head;

[0010] Furthermore, an abutment block is fixedly mounted on one end of the protrusion;

[0011] Furthermore, the other end of the protrusion is provided with an arc surface;

[0012] One end of the screw rod realizes the anti-theft function through the anti-theft component. A freely rotatable cylindrical block is provided inside the bolt head. The special-shaped hole inside it requires a special tool to screw. Ordinary tools cannot be inserted into the special-shaped hole or apply torque. The cylindrical block rotates relative to the bolt head through the bearing. The limit plate on the outer wall of the cylindrical block cooperates with the protrusion on the inner wall of the bolt head. When tightening clockwise, the limit plate abuts against the abutment block to transmit torque. When disassembling counterclockwise, the curved surface causes the limit plate to slip off, and the cylindrical block idles and cannot transmit reverse force, thereby preventing violent disassembly and greatly improving the anti-theft effect.

[0013] The utility model has the following beneficial effects:

[0014] (1) The utility model realizes the anti-theft function at one end of the screw rod through the anti-theft component. A cylindrical block that can rotate freely is provided inside the bolt head. The special-shaped hole inside the cylindrical block requires a special tool to be screwed. Ordinary tools cannot be inserted into the special-shaped hole or apply torque. The cylindrical block rotates relative to the bolt head through the bearing. The limit plate on the outer wall of the cylindrical block cooperates with the convex block on the inner wall of the bolt head. When tightening clockwise, the limit plate abuts against the abutment block to transmit torque. When disassembling counterclockwise, the arc surface causes the limit plate to slip off, and the cylindrical block idles and cannot transmit reverse force, thereby achieving the effect of preventing violent disassembly and greatly improving the anti-theft effect.

[0015] (2) The utility model has an arc-shaped surface, which allows the device to automatically slide off during reverse disassembly, thus avoiding structural damage and increasing its service life.

[0016] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 This is a schematic diagram of the overall structure of the utility model Figure 1 ;

[0019] Figure 2 This is a schematic diagram of the overall structure of the utility model Figure 2 ;

[0020] Figure 3 This is a schematic diagram of the unpacking of the overall structure of the utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the bump of the utility model;

[0022] In the accompanying drawings, the components represented by the reference numerals are as follows:

[0023] In the figure: 1. Screw; 2. Anti-theft component; 201. Bolt head; 202. Mounting groove; 203. Bearing; 204. Cylindrical block; 205. Special-shaped hole; 206. Limiting plate; 207. Protrusion; 208. Abutment block; 209. Arc surface; 3. Nut. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figures 1-4 As shown, the utility model is an anti-theft bolt, comprising a screw rod 1 and a nut 3. The outer surface of the screw rod 1 is threadedly connected to the nut 3. An anti-theft component 2 is fixedly installed at one end of the screw rod 1, and the anti-theft end of the anti-theft component 2 is arranged at one end of the screw rod 1.

[0026] The anti-theft component 2 includes a bolt head 201, which is fixedly mounted on one end of the screw rod 1. A mounting groove 202 is fixedly mounted inside the bolt head 201. A bearing 203 is mounted on the inner surface of the mounting groove 202. A cylindrical block 204 is mounted on the inner wall of the bearing 203.

[0027] A special-shaped hole 205 is opened inside the cylindrical block 204, and a limit plate 206 is fixedly installed on the outer surface of the cylindrical block 204. The number of the limit plates 206 is fixed at two, and the limit plates 206 are relatively distributed on the outer surface of the cylindrical block 204;

[0028] The outer surface of the bolt head 201 is fixedly mounted with protrusions 207 , the number of which is fixed at two, and the protrusions 207 are relatively distributed on the outer surface of the bolt head 201 ;

[0029] An abutment block 208 is fixedly mounted on one end of the protrusion 207;

[0030] The other end of the protrusion 207 is provided with an arc-shaped surface 209;

[0031] One end of the screw rod 1 realizes the anti-theft function through the anti-theft component 2. A freely rotatable cylindrical block 204 is provided inside the bolt head 201. The special-shaped hole 205 inside it requires a special tool to be screwed. Ordinary tools cannot be inserted into the special-shaped hole 205 or apply torque. The cylindrical block 204 rotates relative to the bolt head 201 through the bearing 203. The limit plate 206 on the outer wall of the cylindrical block 204 cooperates with the protrusion 207 on the inner wall of the bolt head 201. When tightening clockwise, the limit plate 206 abuts against the abutment block 208 to transmit torque. When disassembling counterclockwise, the curved surface 209 causes the limit plate 206 to slip off, and the cylindrical block 204 idles and cannot transmit reverse force, thereby achieving the effect of preventing violent disassembly and greatly improving the anti-theft effect.

[0032] When in use, first, one end of the screw rod 1 realizes the anti-theft function through the anti-theft component 2, and a freely rotatable cylindrical block 204 is provided inside the bolt head 201. The special-shaped hole 205 inside it requires a special tool to be screwed, and ordinary tools cannot be inserted into the special-shaped hole 205 or apply torque, and the cylindrical block 204 rotates relative to the bolt head 201 through the bearing 203, and the limit plate 206 on the outer wall of the cylindrical block 204 cooperates with the protrusion 207 on the inner wall of the bolt head 201. When tightening clockwise, the limit plate 206 abuts against the abutment block 208 to transmit torque. When disassembling counterclockwise, the arc surface 209 causes the limit plate 206 to slip off, and the cylindrical block 204 idles and cannot transmit reverse force, thereby achieving the effect of preventing violent disassembly and greatly improving the anti-theft effect.

[0033] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments do not describe all details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An anti-theft bolt, comprising a screw rod (1) and a nut (3), wherein the outer surface of the screw rod (1) is threadedly connected to the nut (3), and is characterized in that: An anti-theft component (2) is fixedly mounted on one end of the screw rod (1), and the anti-theft end of the anti-theft component (2) is arranged on one end of the screw rod (1); The anti-theft component (2) comprises a bolt head (201), the bolt head (201) being fixedly mounted on one end of the screw rod (1), a mounting groove (202) being fixedly mounted inside the bolt head (201), a bearing (203) being mounted on the inner surface of the mounting groove (202), and a cylindrical block (204) being mounted on the inner wall of the bearing (203); A special-shaped hole (205) is provided inside the cylindrical block (204), and a limiting plate (206) is fixedly installed on the outer surface of the cylindrical block (204). The number of the limiting plates (206) is fixed at two, and the limiting plates (206) are relatively distributed on the outer surface of the cylindrical block (204); The outer surface of the bolt head (201) is fixedly mounted with a protrusion (207), the number of the protrusions (207) is fixed at two, and the protrusions (207) are relatively distributed on the outer surface of the bolt head (201); An abutment block (208) is fixedly mounted on one end of the protrusion (207).

2. The anti-theft bolt according to claim 1, characterized in that: The other end of the protrusion (207) is provided with an arc-shaped surface (209).

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