Anti-theft bolt

Abstract

The utility model discloses an anti-theft bolt, which relates to the technical field of bolts, and comprises a U-shaped base, a bolt cap, a gasket and a bolt rod fixedly connected with the upper end of the gasket, a stepped groove is arranged in the bolt cap, and a plurality of limiting holes are arranged on the inner wall of the upper end of the stepped groove in a circle center array manner; the gasket is arranged in the stepped groove, a limiting ring which is integrally formed and connected is arranged on the side wall of the lower end of the gasket, a plurality of first mounting holes are formed in the upper end of the gasket in a circle center array mode, second mounting holes are formed in the positions, corresponding to the first mounting holes, of the side wall of the gasket, and the second mounting holes communicate with the first mounting holes; extrusion columns are movably inserted into the upper ends of the first mounting holes, and grooves of semicircular structures are formed in the side walls of the extrusion columns; according to the anti-theft bolt, the bolt cap is disconnected in the fastening and locking process of the whole anti-theft bolt, the whole anti-theft function is guaranteed, the bolt cap cannot be detached even if a groove is formed in a bolt cap cutting tool due to external force damage, and the anti-theft bolt has practicability.

Description

Technical Field

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

[0002] Bolt: A mechanical part, a cylindrical threaded fastener equipped with a nut. It is a type of fastener consisting of a head and a screw (a cylinder with external threads). It needs to be matched with a nut and is used to fasten two parts with through holes.

[0003] The current bolt structure is simple and lacks anti-theft function, or a bolt cap with a special structure is used for locking with professional tools to increase the anti-theft function. For example, an anti-theft bolt with application number CN202323562861.2 adopts a plum blossom-shaped bolt head, which requires an adapted plum blossom-shaped disassembly tool to disassemble and install the application. It cannot prevent illegal elements from using cutting tools to cut grooves and destroy the bolt cap to create a cross groove. In order to solve the above-mentioned problems, the utility model proposes an anti-theft bolt. Utility Model Content

[0004] The purpose of the present utility model is to provide an anti-theft bolt to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: an anti-theft bolt, comprising a U-shaped base, a bolt cap, a gasket, and a bolt rod fixedly connected to the upper end of the gasket, wherein a stepped groove is provided inside the bolt cap, and a plurality of limiting holes are provided in a circle-centered array on the inner wall of the upper end of the stepped groove;

[0006] The gasket is arranged in the stepped groove, and a limiting ring integrally formed and connected is provided on the side wall of the lower end of the gasket. A plurality of first mounting holes are arranged in a circular array inside the upper end of the gasket, and a second mounting hole is provided on the side wall of the gasket at a position corresponding to the first mounting hole, and the second mounting hole is connected to the first mounting hole;

[0007] An extrusion column is movably inserted into the upper end of each of the first mounting holes, a semicircular groove is provided on the side wall of the extrusion column, and a T-shaped telescopic shaft is movably inserted into the lower end of the extrusion column, and a support spring is connected between the lower end of the T-shaped telescopic shaft and the lower end of the extrusion column;

[0008] A limiting shaft is movably inserted into the second mounting hole, one end of the limiting shaft is connected to a limiting plate, the limiting plate is correspondingly inserted into the limiting hole, and a return spring is connected between the limiting plate and the side wall of the second mounting hole.

[0009] Preferably, the lower end of the T-shaped telescopic shaft is provided with an external thread, the lower end of the first mounting hole is provided with an internal thread, and the T-shaped telescopic shaft and the first mounting hole are threadedly connected via the external thread and the internal thread.

[0010] Preferably, limiting strips are symmetrically provided on the side walls of the upper end shaft portion of the T-shaped telescopic shaft, limiting grooves are symmetrically provided on the inner side walls of the extrusion column, and the limiting strips are correspondingly provided on the limiting grooves.

[0011] Preferably, the head of the limiting shaft is configured as a semicircular head, and the diameter of the semicircular head is equal to the inner diameter of the groove.

[0012] Preferably, the diameter of the limiting piece is equal to the inner diameter of the limiting hole.

[0013] Compared with the prior art, the beneficial effects of the present invention are: the present invention uses the anti-theft bolt as the whole, and the bolt cap is disconnected during the tightening and locking process, thereby ensuring the overall anti-theft function. Even if the bolt cap is grooved by the cutting tool due to external force, it cannot be disassembled through the bolt cap, and is practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0015] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0016] Figure 3 This is a schematic diagram of the split structure of the utility model;

[0017] Figure 4 This is a schematic cross-sectional view of the utility model;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of the gasket of the present utility model;

[0019] Figure 6 This is a schematic diagram of the structure of the extrusion column and the limiting piece of the utility model;

[0020] Figure 7 This is a schematic diagram of the anti-theft bolt connection structure of the utility model;

[0021] Figure 8 This is a schematic cross-sectional view of the anti-theft bolt connection state of the utility model.

[0022] In the figure: 1. Bolt cap; 11. Step groove; 12. Limiting hole; 2. Gasket; 21. Limiting ring; 22. First mounting hole; 23. Second mounting hole; 24. Extrusion column; 241. Groove; 25. T-shaped telescopic shaft; 251. Limiting strip; 26. Support spring; 27. Limiting shaft; 271. Limiting plate; 272. Return spring; 3. Bolt rod. DETAILED DESCRIPTION

[0023] 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.

[0024] See also Figure 1-8 The utility model provides a technical solution: an anti-theft bolt, comprising a bolt cap 1, a gasket 2, and a bolt rod 3 fixedly connected to the upper end of the gasket 2, a stepped groove 11 is provided inside the bolt cap 1, and a plurality of limiting holes 12 are arranged in a circle array on the inner wall of the upper end of the stepped groove 11;

[0025] The gasket 2 is arranged in the stepped groove 11, and a limiting ring 21 is integrally formed and connected on the side wall of the lower end of the gasket 2. A plurality of first mounting holes 22 are arranged in a circular array inside the upper end of the gasket 2. Second mounting holes 23 are provided on the side wall of the gasket 2 at positions corresponding to the first mounting holes 22, and the second mounting holes 23 are connected to the first mounting holes 22.

[0026] An extrusion column 24 is movably inserted into the upper end of each first mounting hole 22. A semicircular groove 241 is provided on the side wall of the extrusion column 24. A T-shaped telescopic shaft 25 is movably inserted into the lower end of the extrusion column 24. A support spring 26 is connected between the lower end of the T-shaped telescopic shaft 25 and the lower end of the extrusion column 24.

[0027] A limiting shaft 27 is movably inserted into the second mounting hole 23 , and one end of the limiting shaft 27 is connected to a limiting piece 271 . The limiting piece 271 is correspondingly inserted into the limiting hole 12 , and a return spring 272 is connected between the limiting piece 271 and the side wall of the second mounting hole 23 .

[0028] Furthermore, the lower end of the T-shaped telescopic shaft 25 is provided with an external thread, and the lower end of the first mounting hole 22 is internally threaded. The T-shaped telescopic shaft 25 and the first mounting hole 22 are threadedly connected via the external and internal threads. The threaded connection between the lower end of the T-shaped telescopic shaft 25 and the first mounting hole 22 facilitates the installation of the extrusion column 24 and the T-shaped telescopic shaft 25 corresponding to the first mounting hole 22.

[0029] Furthermore, the upper end of the T-shaped telescopic shaft 25 is symmetrically provided with limit bars 251 on its sidewalls, and the inner sidewalls of the extrusion column 24 are symmetrically provided with limit grooves, with the limit bars 251 correspondingly positioned in the limit grooves. Rotating the extrusion column 24 synchronously rotates the T-shaped telescopic shaft 25, thereby threading the external thread of the T-shaped telescopic shaft 25 into the internal thread of the first mounting hole 22.

[0030] Furthermore, the head of the limiting shaft 27 is configured as a semicircular head, and the diameter of the semicircular head is equal to the inner diameter of the groove 241. This facilitates the semicircular head to be inserted into the groove 241, thereby achieving the extension and contraction of the limiting shaft 27, and then the limiting piece 271 is separated from the limiting hole 12 and enters the second mounting hole 23, and the bolt cap 1 is disconnected from the gasket 2, thereby preventing the bolt cap 1 from driving the bolt rod 3 to rotate, thereby achieving an anti-theft effect.

[0031] Furthermore, the diameter of the limiting piece 271 is equal to the inner diameter of the limiting hole 12. The limiting piece 271 is inserted into the limiting hole 12 in the initial state to ensure the connection linkage between the bolt cap 1 and the gasket 2, so as to facilitate the overall locking use.

[0032] Specifically, first Figure 1 and Figure 4 As shown, when the anti-theft bolt is connected and used, a tool is used to rotate the hexagonal bolt cap 1. Since the limiting shaft 27 is inserted into the limiting hole 12, it has a limiting function. The bolt rod 3 is continuously rotated and pushed forward. When the extrusion column 24 contacts the surface of the part, it is squeezed into the first mounting hole 22 and squeezes the support spring 26 for storage. Then, the limiting shaft 27 is aligned with the groove 241, and under the pulling force of the reset spring 272, the limiting shaft 27 is reset and inserted into the groove 241. Figure 7 and Figure 8 As shown, at this time, the limiting plate 271 disengages from the limiting hole 12 and enters the second mounting hole 23, and the bolt cap 1 and the gasket 2 are disconnected. Under the limitation of the limiting ring 21 and the stepped groove 11, the bolt cap 1 can only rotate idly around the gasket 2, ensuring the anti-theft effect.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-theft bolt, comprising a bolt cap (1), a gasket (2), and a bolt rod (3) fixedly connected to the upper end of the gasket (2), characterized in that: The bolt cap (1) is provided with a stepped groove (11) inside, and a plurality of limiting holes (12) are provided on the inner wall of the upper end of the stepped groove (11) in a circle-centered array; The gasket (2) is arranged in the stepped groove (11), and a limiting ring (21) is provided on the side wall of the lower end of the gasket (2) and is integrally formed and connected. A plurality of first mounting holes (22) are arranged in a circle array inside the upper end of the gasket (2), and a second mounting hole (23) is provided on the side wall of the gasket (2) at a position corresponding to the first mounting hole (22), and the second mounting hole (23) is connected to the first mounting hole (22); An extrusion column (24) is movably inserted into the upper end of each of the first mounting holes (22); a semicircular groove (241) is provided on the side wall of the extrusion column (24); and a T-shaped telescopic shaft (25) is movably inserted into the lower end of the extrusion column (24); a support spring (26) is connected between the lower end of the T-shaped telescopic shaft (25) and the lower end of the extrusion column (24); A limiting shaft (27) is movably inserted into the second mounting hole (23), one end of the limiting shaft (27) is connected to a limiting piece (271), the limiting piece (271) is correspondingly inserted into the limiting hole (12), and a return spring (272) is connected between the limiting piece (271) and the side wall of the second mounting hole (23).

2. The anti-theft bolt according to claim 1, characterized in that: The lower end of the T-shaped telescopic shaft (25) is provided with an external thread, and the lower end of the first mounting hole (22) is provided with an internal thread. The T-shaped telescopic shaft (25) and the first mounting hole (22) are threadedly connected via the external thread and the internal thread.

3. The anti-theft bolt according to claim 1, characterized in that: Limiting strips (251) are symmetrically provided on the side wall of the upper end shaft portion of the T-shaped telescopic shaft (25), and limiting grooves are symmetrically provided on the inner side wall of the extrusion column (24), and the limiting strips (251) are correspondingly provided on the limiting grooves.

4. The anti-theft bolt according to claim 1, characterized in that: The head of the limiting shaft (27) is configured as a semicircular head, and the diameter of the semicircular head is equal to the inner diameter of the groove (241).

5. The anti-theft bolt according to claim 1, characterized in that: The diameter of the limiting piece (271) is equal to the inner diameter of the limiting hole (12).

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