Locking anti-theft bolt for automobile

Abstract

A deadlock anti-theft bolt for an automobile comprises a bolt body, the head of the bolt body is in a non-standard polygon shape, and threads of the rod portion of the bolt body are of a deadlock thread structure. And an internal thread matched with the thread of the rod part of the bolt body is arranged in the nut. The locking anti-theft bolt for the automobile is reasonable in design, it is guaranteed that the bolt cannot loosen or fall off under the normal use condition, stable connection of automobile parts is guaranteed, lawbreakers can be effectively prevented from disassembling the bolt through conventional tools, and the anti-theft capacity of the automobile is improved.

Description

Technical Field

[0001] This utility model relates to the field of bolt technology, specifically to a locking anti-theft bolt for automobiles. Background Technology

[0002] With the continuous development of the automotive industry, car theft has become an increasingly important issue. Traditional automotive bolts, as key components for connecting and securing automotive parts, have limitations in anti-theft design. The design and manufacture of these traditional bolts often focus on meeting basic connection and fastening functions, with relatively insufficient consideration given to anti-theft performance. Their structural and design features make them easily disassembled by criminals using common tools and methods.

[0003] For example, some traditional bolts may only be prevented from loosening and being stolen by simply increasing the tightening force of the nut or using ordinary anti-loosening washers. Criminals can use common tools, such as wrenches, to apply greater external force to overcome friction and thus remove the bolts. Other traditional bolts use ordinary anti-theft covers, which are easily damaged by force. Once damaged, the bolts are exposed and easily removed.

[0004] In light of this situation, in order to protect the property safety of car owners and ensure the normal use of cars, it is urgent to develop a new type of automotive bolt with locking and anti-theft functions, providing a more reliable guarantee for the safety of cars. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a locking anti-theft bolt for automobiles. It is reasonably designed to ensure that the bolt will not loosen or fall off under normal use, thus ensuring the stable connection of automobile parts. It can effectively prevent criminals from disassembling the bolts using conventional tools, thereby improving the anti-theft capability of automobiles and has broad application prospects.

[0006] Technical solution: A locking anti-theft bolt for automobiles, comprising:

[0007] The bolt body has a non-standard polygonal head and a locking thread structure on the shank.

[0008] The nut has an internal thread that matches the thread on the shank of the bolt body.

[0009] The bolt head of this invention has a non-standard polygonal shape, unlike the traditional hexagonal head. This design makes ordinary wrenches unsuitable for this bolt head because the opening size and shape of ordinary wrenches do not match this special shape, and therefore cannot provide effective torque to remove the bolt. Only a wrench specifically designed for this special shape can be used to perform the operation, greatly increasing the difficulty for criminals to dismantle the bolt.

[0010] The bolt body of this invention features a special locking thread design on its shank, with a tooth profile different from ordinary threads and optimized tooth crest and root shapes. The internal threads of the nut used with the bolt match the locking thread structure of the bolt. During tightening, this special thread generates greater friction and engagement force. When the bolt is tightened to a certain extent, the threads lock together, preventing the bolt from loosening or rotating under external force.

[0011] Furthermore, in the aforementioned automotive locking anti-theft bolt, the polygonal shape is one of a dodecagon, a fourteen-sided polygon, a seventeen-sided polygon, or a nineteen-sided polygon.

[0012] Furthermore, in the aforementioned automotive locking anti-theft bolt, the locking thread structure has a tooth angle of 65-75°, and both the tooth crest and the tooth root are serrated.

[0013] The thread angle of a standard triangular thread is typically 60°, while the thread angle of the locking thread structure described in this invention is designed to be 65-75°. Increasing the thread angle increases the contact pressure between the thread flanks during tightening, thereby generating greater friction and engagement force. When the bolt is subjected to external force, this increased friction and engagement force effectively prevents relative slippage between the threads, preventing the bolt from loosening or rotating.

[0014] The crest and root of ordinary threads are usually straight lines or simple arcs. The locking thread structure of this invention features a sawtooth-shaped crest and root. When tightening the bolt, the sawtooth-shaped crest and root can interlock, creating a "biting" effect that greatly increases the friction and interlocking force between the threads. This design makes it difficult for the bolt to loosen or rotate when subjected to external force.

[0015] Furthermore, in the aforementioned automotive locking anti-theft bolt, the bolt head is provided with a disassembly hole, and textures are provided around the disassembly hole to conceal it.

[0016] The bolt head has seemingly ordinary textured patterns around the removal hole to conceal its presence, making it difficult to spot without close inspection. When removal is required, a special removal tool must be used, with its head precisely matched to the removal hole, to insert and perform the removal operation.

[0017] Furthermore, in the aforementioned automotive locking anti-theft bolt, the bolt body shank is made of high-strength alloy steel and has a hardened layer on its surface.

[0018] The bolt body and shank are made of high-strength alloy steel and are hardened on the surface to form a hardened layer, which improves its hardness and wear resistance.

[0019] Furthermore, in the aforementioned automotive locking anti-theft bolt, the surface of the bolt body shank is provided with protrusions and / or grooves.

[0020] If a thief attempts to use a saw blade to cut the bolt, the high-strength alloy steel material and hardening treatment make it difficult for the saw blade to cut into the bolt body. The irregular protrusions and / or grooves on the surface will cause the saw blade to be constantly impacted and obstructed during the sawing process, reducing sawing efficiency and possibly even damaging the saw blade.

[0021] Furthermore, in the aforementioned automotive locking anti-theft bolt, the outer surface of the nut is provided with anti-slip texture.

[0022] The outer surface of the nut features an anti-slip design to increase friction and prevent it from being clamped by ordinary tools during disassembly.

[0023] Furthermore, in the aforementioned automotive locking anti-theft bolt, a sealing washer is provided at the mating part between the bolt body and the nut.

[0024] Setting a sealing washer at the mating part of the nut and bolt body can not only prevent moisture, dust and other impurities from entering the thread gap and affecting the locking effect, but also play a certain role in rust prevention.

[0025] The beneficial effects of this utility model are as follows: The automotive locking anti-theft bolt described in this utility model is reasonably designed and improves the overall anti-theft performance in multiple aspects. The bolt head adopts a non-standard polygonal shape, which makes it impossible to fit a regular wrench, greatly increasing the difficulty for others to disassemble it. The thread of the bolt shank adopts a special locking thread structure, whose tooth profile is different from ordinary threads. The shape of the tooth crest and root has been optimized. The internal thread of the nut used with the bolt body matches the locking thread structure of the bolt, ensuring a good locking effect after tightening and preventing the bolt from loosening or rotating under external force, thus increasing the difficulty for others to disassemble it. The bolt shank is made of high-strength alloy steel and has been hardened on the surface to form a hardened layer, improving its hardness and wear resistance. At the same time, irregular protrusions and grooves are set on the surface of the shank, increasing the difficulty of sawing. A sealing washer is set at the mating part of the nut and bolt to prevent moisture, dust and other impurities from entering the thread gap and affecting the locking effect. It has broad application prospects. Attached Figure Description

[0026] Figure 1 This is a front view of the automotive locking anti-theft bolt described in this utility model;

[0027] Figure 2 This is a top view of the automotive locking anti-theft bolt described in this utility model;

[0028] In the diagram: Bolt body 1, locking thread structure 11, disassembly hole 12, texture 13, protrusion 14, groove 15, nut 2, anti-slip texture 21, sealing washer 3. Detailed Implementation

[0029] The following is in conjunction with the appendix Figure 1 , 2 The present invention will be further illustrated by Examples 1 and 2.

[0030] Example 1

[0031] like Figure 1 , 2 As shown, the automotive locking anti-theft bolt of this utility model includes a bolt body 1 and a nut 2.

[0032] like Figure 1 , 2 As shown, the bolt body 1 of this utility model has a head that differs from the traditional hexagonal head, adopting a non-standard polygonal shape. Figure 1 , 2 The bolt body 1 has a dodecagonal head, but in practical applications, dodecagonal, tetradecagonal, heptadecagonal, and 19decagonal shapes can be used. Because the opening size and shape of ordinary wrenches do not match this non-standard polygonal shape, only wrenches specially designed for this special shape can be used to perform the corresponding operation, greatly increasing the difficulty for criminals to disassemble.

[0033] Furthermore, the thread on the shank of the bolt body 1 is a locking thread structure 11 with a tooth angle of 65-75° and serrated crests and roots. The thread on the shank of the bolt 1 of this invention employs a special locking thread design, with a tooth profile different from ordinary threads and optimized crest and root shapes. During tightening, this special thread generates greater friction and engagement force. When the bolt 1 is tightened to a certain extent, the threads lock together, preventing the bolt from loosening or rotating under external force. The internal thread of the nut 2, used in conjunction with the bolt body 1, matches the locking thread structure 11 of the bolt body 1, ensuring a good locking effect after tightening.

[0034] Furthermore, such as Figure 2As shown, the bolt body 1 has a disassembly hole 12 at its head, and the disassembly hole 12 is decorated with some seemingly ordinary textures 13 to conceal its existence, making it difficult to spot without careful observation. Furthermore, when disassembly is required, the head shape of the disassembly tool must precisely match the disassembly hole to be inserted and disassembled, which also increases the difficulty for criminals to disassemble the bolt.

[0035] Example 2

[0036] Based on the structural foundation of Embodiment 1 and above, such as Figure 1 , 2 As shown.

[0037] The locking anti-theft bolt for automobiles described in this utility model has a bolt body 1 made of high-strength alloy steel, and the surface is hardened to form a hardened layer, which improves its hardness and wear resistance.

[0038] Furthermore, the bolt body 1 has protrusions 14 and grooves 15 on its shank surface. If a thief attempts to cut the bolt with a saw blade, the high-strength alloy steel material and hardening treatment make it difficult for the saw blade to cut into the bolt body shank. The irregular protrusions 14 and grooves 15 on the surface will cause the saw blade to be constantly impacted and obstructed during the sawing process, reducing sawing efficiency and potentially damaging the saw blade. This also increases the difficulty for criminals to dismantle the bolt.

[0039] Furthermore, the outer surface of the nut 2 is designed with anti-slip texture 21 to increase friction and prevent it from being clamped by ordinary tools during disassembly.

[0040] Furthermore, a sealing washer 3 is provided at the mating part of the nut 2 and the bolt body 1, which can not only prevent moisture, dust and other impurities from entering the thread gap and affecting the locking effect, but also play a certain role in rust prevention.

[0041] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A locking anti-theft bolt for automobiles, characterized in that, include: Bolt body (1), the head of the bolt body (1) is polygonal, and the thread of the shank of the bolt body (1) is a locking thread structure (11). Nut (2), the nut (2) has an internal thread that matches the thread of the bolt body (1) rod.

2. The automotive locking anti-theft bolt according to claim 1, characterized in that, The polygon shape is one of a dodecagon, a fourteen-sided polygon, a seventeen-sided polygon, or a nineteen-sided polygon.

3. The automotive locking anti-theft bolt according to claim 1, characterized in that, The locking thread structure (11) has a tooth angle of 65-75°, and both the tooth crest and the tooth root are serrated.

4. The automotive locking anti-theft bolt according to claim 1, characterized in that, The bolt body (1) has a disassembly hole (12) at its head, and textures (13) are provided around the disassembly hole (12) to hide the disassembly hole (12).

5. The automotive locking anti-theft bolt according to claim 1, characterized in that, The bolt body (1) has a shank made of high-strength alloy steel and a hardened layer on its surface.

6. The automotive locking anti-theft bolt according to claim 5, characterized in that, The bolt body (1) has protrusions (14) and / or grooves (15) on its shank surface.

7. The automotive locking anti-theft bolt according to claim 1, characterized in that, The outer surface of the nut (2) is provided with anti-slip texture (21).

8. The automotive locking anti-theft bolt according to claim 1, characterized in that, A sealing washer (3) is provided at the mating part of the bolt body (1) and the nut (2).

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