A type of anti-theft bolt that is difficult to disassemble

Abstract

This utility model mainly relates to the field of fastener technology, specifically to an anti-theft bolt that is difficult to disassemble, comprising: a camouflage head with a camouflage drive hole at the top and a transmission sleeve integrally formed at the bottom, the transmission sleeve having an internal hollow structure and communicating with the camouflage drive hole through an axially extending connecting groove; an anti-tampering baffle, matched and disposed at the bottom of the camouflage drive hole, used to isolate and shield the camouflage drive hole from the connecting groove; a screw portion with an assembly cavity at its top, in which a bearing is fixedly installed; the transmission sleeve is fixedly installed in the inner ring of the bearing and can rotate relative to the screw portion; and a drive shaft core, fixedly disposed at the bottom of the assembly cavity and extending upward from the hollow portion of the transmission sleeve into the connecting groove, the top of the drive shaft core having an actual drive hole. Through the shielding of the anti-tampering baffle, only the camouflage drive hole is visible. If a matching tool is mistakenly used to attempt to tighten it, the transmission sleeve will spin freely, while the screw portion remains fixed, thus achieving anti-tampering.

Description

Technical Field

[0001] This utility model mainly relates to the field of fastener technology, specifically to an anti-theft bolt that is not easy to disassemble. Background Technology

[0002] Bolts, as a basic and widely used mechanical fastener, are commonly used for connecting and securing various equipment, facilities, and public infrastructure. However, when securing high-value components such as automobiles, power equipment, communication equipment, and transportation facility accessories, standard bolts pose significant security risks because they can be easily disassembled with common tools. This leads to frequent cases of component theft, causing substantial economic losses and social impact.

[0003] To address this issue, various anti-theft bolts have emerged on the market, most of which focus on employing non-standard, specialized drive structures, such as internal star-shaped, triangular, pentagonal, or even more complex irregularly shaped holes. These designs aim to increase the difficulty of theft by making disassembly tools scarcer. However, these anti-theft bolts still have significant drawbacks: First, although their specialized drive structures differ from standard parts, once the model is identified, thieves can still relatively easily disassemble them by customizing, modifying, or purchasing corresponding specialized tools. Second, the anti-theft performance of these bolts largely depends on the secrecy of the drive structure; their anti-theft effect rapidly diminishes as specialized tools become more widespread, making it difficult to provide long-term, effective security. In other words, most existing technologies can only achieve the effect of a "lock," not true "prevention," failing to fundamentally prevent malicious disassembly by those possessing the matching tools. Utility Model Content

[0004] 1. The technical problem to be solved by the utility model:

[0005] This invention provides an anti-theft bolt that is not easily disassembled, thereby solving the technical problems existing in the background art.

[0006] 2. Technical Solution:

[0007] To achieve the above objectives, the technical solution provided by this utility model is: a non-removable anti-theft bolt, comprising:

[0008] The camouflage head has a camouflage drive hole at the top and a transmission sleeve integrally formed at the bottom. The transmission sleeve has an internal hollow structure and is connected to the camouflage drive hole through an axially extending connecting groove.

[0009] An anti-tampering baffle is fitted at the bottom of the camouflage drive hole to isolate and shield the camouflage drive hole from the connecting groove.

[0010] The screw section has an assembly cavity at its top end, and a bearing is fixedly installed in the assembly cavity.

[0011] The transmission sleeve is fixedly installed in the inner ring of the bearing and can rotate relative to the screw part;

[0012] The drive shaft is fixedly disposed at the bottom of the assembly cavity and extends upward from the hollow part of the transmission sleeve into the communicating groove. The top of the drive shaft has an actual drive hole.

[0013] Furthermore, the bottom of the tamper-proof baffle is evenly provided with multiple vertical inserts, and the bottom of the camouflage drive hole is provided with a corresponding insertion hole for inserting the inserts. The end of the insert extends beyond the bottom of the camouflage head and is provided with an external thread on the extension section. A locking nut engages with the external thread to press and fix the tamper-proof baffle to the bottom of the camouflage drive hole.

[0014] Furthermore, the tamper guard is made of magnetic material.

[0015] Furthermore, a damping mechanism is provided inside the assembly cavity. The damping mechanism includes a radial guide sleeve that is uniformly fixed to the inner wall of the assembly cavity in the circumferential direction. A guide rod is slidably fitted inside the radial guide sleeve. One end of the radial guide rod is connected to the inner end of the radial guide sleeve by a push spring, and the other end is fixed with an arc-shaped friction plate that matches the outer wall of the transmission sleeve.

[0016] Furthermore, the sidewall of the camouflage drive hole is provided with multiple drainage holes near the bottom, and the drainage holes are connected to the outside.

[0017] 3. Beneficial effects:

[0018] Compared with the prior art, the technical solution provided by this utility model has the following advantages: the anti-tampering baffle covers the drive shaft core and the connecting groove, and only the disguised drive hole is visible from the outside. If a matching tool is mistakenly used to try to screw it, the transmission sleeve will spin freely, while the screw part remains fixed, thus achieving anti-tampering. After the authorized personnel remove the baffle, the torque can be transmitted to the drive shaft core through the actual drive hole, which will drive the screw part to rotate, thus achieving assembly and disassembly.

[0019] The push spring pushes the arc-shaped friction plate to press against the outer wall of the transmission sleeve through the guide rod. When the external tool rotates the disguised head, frictional damping is generated between the friction plate and the sleeve, simulating the resistance of a slipping thread to confuse and prevent operation. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0022] Figure 3This is a schematic diagram of the cross-sectional structure of the present invention. Figure 1 ;

[0023] Figure 4 This is a schematic diagram of the cross-sectional structure of the present invention. Figure 2 .

[0024] Figure label:

[0025] 1. Disguised head; 101. Disguised drive hole; 102. Transmission sleeve; 103. Connecting groove; 104. Insertion hole; 105. Drain hole; 2. Anti-disassembly baffle; 201. Insert rod; 202. External thread; 203. Locking nut; 3. Screw part; 301. Assembly cavity; 4. Bearing; 5. Drive shaft core; 501. Actual drive hole; 6. Damping mechanism; 601. Radial guide sleeve; 602. Guide rod; 603. Push spring; 604. Arc-shaped friction plate. Detailed Implementation

[0026] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the utility model will be more thorough and complete.

[0027] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "page", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," "fixing," and "equipped with" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances. Example

[0030] See attached document Figure 1-4 A type of anti-theft bolt that is not easily disassembled, comprising:

[0031] The camouflage head 1 has a camouflage drive hole 101 at the top and a transmission sleeve 102 integrally formed at the bottom. The transmission sleeve 102 has an internal hollow structure and is connected to the camouflage drive hole 101 through an axially extending connecting groove 103.

[0032] The anti-tamper baffle 2 is matched and set at the bottom of the disguised drive hole 101 to isolate and cover the disguised drive hole 101 from the connecting groove 103;

[0033] The screw part 3 has an assembly cavity 301 at its top end, and a bearing 4 is fixedly installed in the assembly cavity 301.

[0034] The transmission sleeve 102 is fixedly installed in the inner ring of the bearing 4 and can rotate relative to the screw part 3;

[0035] The drive shaft core 5 is fixedly installed at the bottom of the assembly cavity 301 and extends upward from the hollow part of the transmission sleeve 102 into the connecting groove 103. The top of the drive shaft core 5 is provided with an actual drive hole 501.

[0036] In this embodiment, the anti-tampering baffle 2 covers the connecting groove 103 and the drive shaft core 5 therein. External operators can only see the disguised drive hole 101. If a tool that matches the disguised drive hole 101 is mistakenly used to try to screw it, the transmission sleeve 102 will spin freely with the tool, while the screw part 3 remains fixed, thereby achieving the anti-tampering effect.

[0037] Authorized personnel can remove the anti-tamper plate 2 to expose the actual drive hole 501 on the top of the drive shaft core 5, and use a matching tool to act on the actual drive hole 501 to transmit torque to the drive shaft core 5, thereby driving the screw part 3 to rotate, thus realizing the installation and removal of the bolt.

[0038] The bottom of the anti-tamper plate 2 is evenly provided with multiple vertical insertion rods 201. The bottom of the camouflage drive hole 101 is provided with an insertion hole 104 for inserting the insertion rods 201. The end of the insertion rod 201 extends beyond the bottom of the camouflage head 1 and is provided with an external thread 202. A locking nut 203 cooperates with the external thread 202 to press and fix the anti-tamper plate 2 to the bottom of the camouflage drive hole 101.

[0039] In this embodiment, the anti-tamper plate 2 can be fixed to the bottom of the disguised drive hole 101 by tightening the nut 203 and the external thread 202. This can effectively resist the vibration and impact that often exist in scenarios such as vehicle driving and equipment operation, and avoid the risk that the anti-tamper plate 2 will fall off from the disguised drive hole 101 due to vibration, thus exposing the real drive shaft core 5 inside.

[0040] In the above embodiments, the anti-tamper plate 2 is made of magnetic material. When the locking nut 203 is loosened and removed, the anti-tamper plate 2 can be attracted and removed using a magnetic tool.

[0041] A damping mechanism 6 is provided inside the assembly cavity 301. The damping mechanism 6 includes a radial guide sleeve 601 that is uniformly fixed to the inner wall of the assembly cavity 301 in the circumferential direction. A guide rod 602 is slidably fitted inside the radial guide sleeve 601. One end of the radial guide rod 602 is connected to the inner end of the radial guide sleeve 601 through a push spring 603, and the other end is fixed with an arc-shaped friction plate 604 that matches the outer wall of the transmission sleeve 102.

[0042] In this embodiment, the elastic force of the push spring 603 drives the guide rod 602 to slide outward along the radial guide sleeve 601, so that the arc-shaped friction plate 604 is pressed against the outer wall of the transmission sleeve 102. When an external tool is inserted into the camouflage drive hole 101 and attempts to rotate the camouflage head 1, the frictional damping force generated between the arc-shaped friction plate 604 and the transmission sleeve 102 can simulate the resistance of a stripped thread, thereby confusing the operator and preventing him from continuing to operate.

[0043] Multiple drainage holes 105 are provided on the side wall of the camouflage drive hole 101 near the bottom. The drainage holes 105 are connected to the outside and are used to drain the liquid that seeps into the camouflage drive hole 101 to prevent the internal components from being corroded due to long-term contact with the liquid.

[0044] The above embodiments only illustrate a certain implementation of the present utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present utility model patent. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the concept of the present utility model, and these all fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model patent should be determined by the appended claims.

[0045] It should be noted that the above content falls within the scope of the inventor's technical knowledge. Due to the vast and complex nature of the technical content in this field, the above content of this application does not necessarily constitute prior art.

Claims

1. A type of anti-theft bolt that is difficult to disassemble, characterized in that: include: The camouflage head (1) has a camouflage drive hole (101) at the top and a transmission sleeve (102) integrally formed at the bottom. The transmission sleeve (102) has an internal hollow structure and is connected to the camouflage drive hole (101) through an axially extending connecting groove (103). Anti-tampering baffle (2) is matched and set at the bottom of the disguised drive hole (101) to isolate and shield the disguised drive hole (101) from the connecting groove (103); The screw part (3) has an assembly cavity (301) at its top end, and a bearing (4) is fixedly installed in the assembly cavity (301). The transmission sleeve (102) is fixedly installed in the inner ring of the bearing (4) and can rotate relative to the screw part (3); The drive shaft core (5) is fixedly disposed at the bottom of the assembly cavity (301) and extends upward from the hollow part of the transmission sleeve (102) into the communicating groove (103). The top of the drive shaft core (5) is provided with an actual drive hole (501).

2. The anti-theft bolt that is not easily disassembled according to claim 1, characterized in that: The bottom of the anti-disassembly baffle (2) is uniformly provided with a plurality of vertical inserts (201). The bottom of the camouflage drive hole (101) is provided with a corresponding insertion hole (104) for inserting the inserts (201). The end of the insert (201) extends beyond the bottom of the camouflage head (1) and is provided with an external thread (202). A locking nut (203) cooperates with the external thread (202) to press and fix the anti-disassembly baffle (2) to the bottom of the camouflage drive hole (101).

3. The anti-theft bolt that is not easily disassembled according to claim 2, characterized in that: The anti-disassembly baffle (2) is made of magnetic material.

4. The anti-theft bolt that is not easily disassembled according to claim 1, characterized in that: The assembly cavity (301) is provided with a damping mechanism (6). The damping mechanism (6) includes a radial guide sleeve (601) that is uniformly fixed to the inner wall of the assembly cavity (301) in the circumferential direction. A guide rod (602) is slidably fitted inside the radial guide sleeve (601). One end of the guide rod (602) is connected to the inner end of the radial guide sleeve (601) by a push spring (603), and the other end is fixed with an arc-shaped friction plate (604) that matches the outer wall of the transmission sleeve (102).

5. The anti-theft bolt that is not easily disassembled according to claim 1, characterized in that: The sidewall of the camouflage drive hole (101) near the bottom is provided with a plurality of drainage holes (105), which are connected to the outside.

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