Anti-theft and anti-loosening bolt structure

Abstract

The utility model relates to an anti-theft and anti-loosening bolt structure, which solves the problem of implementing effective side protection and loosening prevention on a screw rod part and a screw rod head part of an exposed bolt. According to the scheme, the structure comprises a bolt, a screw rod sheath, a bolt head sheath and a control spring. The round head part of the bolt is rotatably connected with the bolt head sheath, the screw rod sheath is slidably sleeved with the bolt head sheath, the control spring is arranged between the bolt head sheath and the screw rod sheath to form an elastic telescopic structure between the bolt head sheath and the screw rod sheath under the control of the control spring, and the screw rod part of the bolt is arranged in the screw rod sheath. The bolt has the beneficial effects that the structure is simple, the bolt head sheath and the screw rod sheath effectively protect the side surfaces of the exposed screw rod part and the exposed screw rod head of the bolt, and meanwhile, the bolt has a screw rod anti-loosening function and is particularly suitable for preventing illegal disassembly through the exposed screw rod part and the exposed screw rod head of the bolt.

Description

Technical Field

[0001] This utility model pertains to standard bolt components used in the field of mechanical manufacturing, specifically a structure for anti-theft and anti-loosening bolts. Background Technology

[0002] For various equipment and devices, bolt fixing and installation, and for the connection of components in the mechanical manufacturing field, bolts are the most basic fixing and connection method. However, some bolts have special requirements for anti-theft and anti-loosening. For example, the bolted installation of license plates, door locks, and the installation of the video doorbell bracket developed by the applicant all require bolts with anti-theft and anti-loosening technical requirements to prevent unauthorized disassembly. When the bolt shank and bolt head are partially exposed after installation, unauthorized individuals can illegally disassemble the bolt through the exposed bolt shank and bolt head.

[0003] The applicant has not found any publicly available literature on how to effectively protect the exposed bolt shank and bolt head while meeting the technical requirements for bolt loosening and preventing unauthorized disassembly of the bolt, thus satisfying usage requirements. For example, Chinese Patent CN206299671U, entitled "License Plate Anti-Disassembly Fastening Device," only achieves its purpose by protecting the bolt head. Utility Model Content

[0004] This utility model provides a bolt structure that effectively protects the exposed bolt shank and head from external damage, while also meeting the technical requirements for bolt loosening prevention. Furthermore, it prevents unauthorized disassembly of the bolt while still meeting usage requirements.

[0005] The technical solution adopted by this utility model to achieve its purpose is: an anti-theft and anti-loosening bolt structure, which includes: a bolt, a screw sleeve, a bolt head sleeve, and a control spring. The circular head of the bolt is rotatably connected to the bolt head sleeve, the screw sleeve is slidably sleeved with the bolt head sleeve, and the control spring is disposed between the bolt head sleeve and the screw sleeve, forming an elastic expansion and contraction structure between the bolt head sleeve and the screw sleeve under the control of the control spring. The screw portion of the bolt is disposed inside the screw sleeve.

[0006] The beneficial effects of this utility model are: simple structure, bolt head sleeve and screw sleeve provide effective side protection for the exposed screw part and screw head, and at the same time have screw anti-loosening function, which is particularly suitable for preventing illegal disassembly through the exposed screw part and screw head.

[0007] The present invention will now be described in detail with reference to the accompanying drawings. Attached Figure Description

[0008] Appendix Figure 1 This is a schematic cross-sectional view of the structure of this utility model.

[0009] Appendix Figure 2 This is a diagram showing the usage state of this utility model.

[0010] In the attached diagram: 1. Bolt, 2. Screw sleeve, 2.1. Bolt rotation control groove, 3. Bolt head sleeve, 3.1. Riveting tapered expansion port, 4. Control spring, 5. Protective plate, 6. Fixing plate, 7. Connecting plate. Detailed Implementation

[0011] Referring to the attached diagram, an anti-theft and anti-loosening bolt structure is described. The structure includes: a bolt 1, a bolt sleeve 2, a bolt head sleeve 3, and a control spring 4.

[0012] The circular head of the bolt 1 is rotatably connected to the bolt head sleeve 3, the screw sleeve 2 is slidably sleeved with the bolt head sleeve 3, the control spring 4 is disposed between the bolt head sleeve 3 and the screw sleeve 2, forming an elastic telescopic structure between the bolt head sleeve 3 and the screw sleeve 2 under the control of the control spring 4, and the screw part of the bolt 1 is disposed inside the screw sleeve 2.

[0013] In use, first rivet one end of the screw sleeve 2 to the fixing plate 6, rotate the end face of the head of the bolt 1 on the other side of the protective plate 5, and the bolt 1 compresses the control spring 4 through the bolt head sleeve 3. The bolt 1 extends out of the screw sleeve 2 to connect the fixing plate 6 and the connecting plate 7 into one piece.

[0014] In use, the bolt 1 between the fixing plate 6 and the protective plate 5 is sealed and protected, preventing unauthorized personnel from removing the bolt 1 between the fixing plate 6 and the protective plate 5. At the same time, the control spring 4 prevents the bolt 1 from rotating, thus achieving the purpose of preventing loosening.

[0015] In this embodiment of the utility model, in order to facilitate the riveting and fixing of one end of the screw sleeve 2 to the fixing plate 6, one end of the bolt head sleeve 3 is provided with a riveting tapered expansion port 3.1.

[0016] In this embodiment of the utility model, in order to facilitate the rotational installation of the screw 1, the end face of the circular head of the bolt 1 is provided with a bolt rotation control groove 2.1.

Claims

1. A theft-proof and anti-loosening bolt structure, characterized in that: The structure includes: a bolt (1), a screw sleeve (2), a bolt head sleeve (3), and a control spring (4); The circular head of the bolt (1) is rotatably connected to the bolt head sleeve (3), the screw sleeve (2) is slidably sleeved with the bolt head sleeve (3), the control spring (4) is set between the bolt head sleeve (3) and the screw sleeve (2), forming an elastic telescopic structure between the bolt head sleeve (3) and the screw sleeve (2) under the control of the control spring (4), and the screw part of the bolt (1) is set inside the screw sleeve (2).

2. The anti-theft and anti-loosening bolt structure according to claim 1, characterized in that: One end of the bolt head sleeve (3) is provided with a riveting tapered expansion port (3.1).

3. The anti-theft and anti-loosening bolt structure according to claim 1, characterized in that: The end face of the circular head of the bolt (1) is provided with a bolt rotation control groove (2.1).

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