CN211174934U - Anti-theft bolt assembly - Google Patents

Abstract

The utility model discloses an anti-theft bolt assembly, comprising an anti-theft bolt and a dismantling screw rod; the anti-theft bolt comprises a screw rod with an external thread and a windmill-shaped bolt head, and the bolt head is provided with a circular concave hole with an internal thread; The external thread is opposite to the internal thread of the circular concave hole, and is in the same direction as the windmill of the bolt head, so that ordinary tools cannot loosen and disassemble the anti-theft thread through the outer circumference of the bolt head, avoiding the occurrence of illegal acts such as theft; The dismantling screw that is adapted to the shaped concave hole ensures the convenience of maintenance and other situations.

Description

An anti-theft bolt assembly

technical field

The utility model relates to a mechanical assembly, in particular to an anti-theft bolt assembly.

Background technique

The statements in this section merely provide background information related to the present disclosure and may constitute prior art. During the process of realizing the present invention, the inventors found that at least the following problems exist in the prior art.

At present, many peripheral devices on the market, such as expensive luxury cars, truck wheels, or power distribution boxes with hidden cables, are easy to cause criminals to peep. Due to various factors, repeated theft incidents have caused huge economic losses and waste of time and energy to car owners or other owners. As a result, there are fasteners such as anti-theft bolts on the market, but most of them are used to improve the fastening effect to prevent theft. Once you encounter criminals who understand technology, you only need to use common disassembly tools, and you will be helpless and will not be able to play the anti-theft effect.

SUMMARY OF THE INVENTION

In view of the above problems, the purpose of the present invention is to solve some problems in the prior art, or at least alleviate these problems.

An anti-theft bolt assembly, comprising

The anti-theft bolt includes a screw rod with an external thread and a windmill-shaped bolt head; the bolt head includes a column-shaped connection part and at least two protrusions extending outward from the side of the connection part; the first part of the connection part is The end face is fixedly connected with the first end face of the screw rod, and the second end face is provided with an inward circular concave hole; the circular concave hole is provided with an inner thread, and the tightening direction of the inner thread is the same as that of the outer thread of the screw rod. The tightening direction is opposite; the protrusion includes a first side surface and an arc-shaped second side surface; the first side surface and the second side surface share a first side edge, and the first side surface and the adjacent protrusion The second side has a total of second sides; the extending direction of the first side of the second side to the second side of the second side is consistent with the tightening direction of the external thread of the screw.

A removal screw for removing the anti-theft bolt.

Preferably, the axis of the circular concave hole is on a straight line with the axis of the screw. The first side surface is a plane, and the extending direction of the first side edge of the first side surface toward the second side edge of the first side surface passes through the axis of the circular recessed hole.

The second side surface is smooth.

Further, the second end of the screw is provided with a hole for the screwing tool to extend into. The pores are inner hexagonal pores.

The anti-theft bolt assembly further includes a bolt tightening sleeve for installing the anti-theft bolt; one end face of the bolt tightening sleeve is provided with an inward concave hole, and the concave hole is in line with the end of the bolt head. Matching; the other end face is provided with a gap for the screwing tool to penetrate.

The first end of the dismounting screw is provided with an external thread which is adapted to the internal thread of the circular concave hole.

The second end of the dismounting screw is provided with a through hole into which the screwing tool is inserted.

The utility model has the following beneficial effects:

1. The anti-theft bolt adopts a windmill-shaped bolt head that is in the same direction as the external thread of the screw. When the general tool is twisted on the outer periphery of the bolt head, it can only be tightened, but not loosened, which plays the role of anti-theft;

2. The tightening direction of the inner thread of the circular concave hole is opposite to the tightening direction of the outer thread of the screw, and the outer thread of the dismantling screw is matched with the inner thread of the circular concave hole, so that the anti-theft bolt can be disassembled by disassembling the screw, which is convenient to carry out maintain;

3. Through holes, voids and porosity are designed for general tools to be inserted, which makes the screwing operation more labor-saving and does not require other tools to assist;

4. The screw of the anti-theft bolt is provided with an inner hexagonal hole. After the anti-theft bolt is removed, it is convenient to separate it from the dismantling screw.

Description of drawings

Fig. 1 is the schematic diagram of the anti-theft bolt of the present invention;

Fig. 2 is the sectional view of the utility model anti-theft bolt;

Fig. 3 is the top view of the anti-theft bolt of the present invention;

Fig. 4 is the schematic diagram of the concave hole of the bolt fastening sleeve of the present invention;

Fig. 5 is the schematic diagram of the gap of the utility model bolt fastening sleeve;

FIG. 6 is a schematic diagram of the disassembling screw of the present invention.

Among them: 1-screw; 2-connecting part; 3-circular concave hole; 4-convex; 5-first side; 6-second side; 7-first side; 8-second side; 9 - Inner hexagonal hole; 10 - concave hole; 11 - void; 12 - through hole.

Detailed ways

Below in conjunction with the accompanying drawings, the present utility model will be further described. The embodiments of the present utility model are only used to illustrate the present utility model rather than limit the present utility model. Various substitutions and changes made using conventional means should be included within the scope of the present invention.

As shown in Figure 1 or 2 or 3 or 4 or 5 or 6, an anti-theft bolt assembly includes

The anti-theft bolt includes a screw 1 with an external thread and a windmill-shaped bolt head; the bolt head includes a cylindrical connecting part 2 and at least two protrusions 4 extending outward from the side of the connecting part 2; the connection The first end surface of the part 2 is fixedly connected with the first end surface of the screw 1, and the second end surface is provided with an inward circular concave hole 3; the circular concave hole 3 is provided with an internal thread, and the internal thread is tightened The direction is opposite to the tightening direction of the external thread of the screw 1; the protrusion 4 includes a first side 5 and an arc-shaped second side 6; the first side 5 and the second side 6 share a first side 7, The first side 5 and the second side 6 of the adjacent protrusion 4 share a second side 8; the first side 7 of the second side 6 faces the second side of the second side 6 The extending direction of the side edge 8 is consistent with the tightening direction of the external thread of the screw 1 .

A removal screw for removing the anti-theft bolt.

As shown in FIG. 2 , when the inner thread of the circular concave hole 3 is a left-handed thread, the outer thread of the screw 1 is a right-handed thread, so that it remains opposite. Similarly, when the inner thread of the circular concave hole 3 is a right-hand thread, the outer thread of the screw 1 is a left-hand thread.

The structure of the protrusion 4 makes the bolt head in the shape of a windmill, and its direction is consistent with the tightening direction of the external thread of the screw 1 . Due to the unidirectional rotation of the windmill-shaped bolt head, the general external screwing tools, such as wrenches, can only apply force in the direction of tightening the external thread of the screw 1, and will slide in the reverse direction and cannot be forced, so that the anti-theft bolts are generally externally screwed. The tool cannot be loosened or disassembled, and can only be disassembled through the inner thread of the circular concave hole 3, which to a certain extent prevents criminals from unscrewing and disassembling the anti-theft bolt through common wrenches and other tools. Even if a matching tool is made, due to the special stress shape of the petals, this tool can only be tightened but not loosened, thus playing a role in preventing theft. In addition, the surface of the second side surface 6 is smooth, which makes the reverse rotation more difficult and more difficult to loosen.

At the same time, the internal thread of the circular recessed hole 3 adopts a specific thread structure, which cannot be matched with a general threaded disassembly tool. The first end of the dismounting screw is provided with an external thread matching the internal thread of the circular concave hole 3 , as shown in FIG. 6 , so that the anti-theft bolt can only be loosened and disassembled by dismounting the screw. At the same time, the anti-theft bolt can be easily disassembled by disassembling the screw, which ensures the convenience of maintenance. Since the internal thread is inside the circular concave hole 3, it is difficult to measure, which increases the difficulty of making matching tools; and the thread processing requires professional equipment, which increases the difficulty of making tools again.

The inner thread of the circular concave hole 3 can be designed with a specific thread structure by adjusting the thread pitch, so as to achieve the above purpose. Even, like every luxury car, a unique thread structure can be designed, just like a combination lock. Only the own set of disassembly screws can be disassembled, which avoids the possibility of technical disassembly of the anti-theft bolts to the greatest extent, and reduces the risk of theft.

The second end of the dismantling screw is provided with a through hole 12 into which a screwing tool is inserted, as shown in FIG. 6 , which is convenient for general screwing tools, such as a hexagonal wrench, to be inserted, and is convenient for rotation and disassembly.

The bolt head is in the shape of a windmill-like one-way force. As shown in Figure 1 or 3, the protrusion 4 includes a first side 5 and an arc-shaped second side 6; the first side 5 and the second side 6 share a common shape. The first side 7, the first side 5 and the second side 6 of the adjacent protrusion 4 share a second side 8; the first side 7 of the second side 6 faces the second side. The extending direction of the second side edge 8 of the two side surfaces 6 is consistent with the tightening direction of the external thread of the screw 1 . When the screw 1 is provided with a right-hand thread, the windmill direction of the bolt head is also right-handed. When the bolt head is acted clockwise by a tool such as a wrench, the first side 5 of the projection 4 is acted upon, so that clockwise tightening can be achieved. When the bolt head is acted counterclockwise by a tool such as a wrench, since the second side 6 of the protrusion 4 is an arc-shaped surface, the wrench or the like cannot act on it, and it will slide out so that the bolt head cannot be rotated counterclockwise, so that the The bolt head achieves the purpose of unidirectional force.

The screw 1 is provided with a left-handed thread for the same reason.

The arc surface of the first side surface 6 can be a smooth curve that slowly transitions and gradually approaches the center of the connecting portion, which improves the sliding rate in the loosening direction, prevents tools such as wrenches from loosening the anti-theft bolts, and improves the anti-theft capability.

As shown in FIG. 4 or 5, the anti-theft bolt assembly further includes a bolt tightening sleeve for installing the anti-theft bolt; one end face of the bolt tightening sleeve is provided with an inward concave hole 10, the concave hole 10 is matched with the end of the bolt head; the other end face is provided with a gap 11 for the screwing tool to penetrate. Align the concave hole 10 with the bolt head, then the bolt tightening sleeve can be sleeved on the bolt head, and the general tool can be inserted into the gap 11 and twisted to complete the installation of the anti-theft bolt. The bolt tightening sleeve can be more convenient to install and tighten the anti-theft bolt, and will not cause great wear to the windmill-shaped bolt head.

The concave hole 10 of the bolt tightening sleeve can be completely matched with the bolt head, so as to avoid sliding due to excessive clearance during tightening.

The number of protrusions 4 extending outward from the side surface of the connecting portion 2 may be four, which are regularly arranged, as shown in FIG. 1 or 3 . It can also be 2 or 3, or 5 or 6, or more, which can be made according to the actual situation. A plurality of protrusions 4 are connected end to end at the periphery of the connecting portion 2, thereby forming a wind car.

The protrusions 4 can be irregularly arranged, which can also achieve the anti-theft effect.

Preferably, the axis of the circular concave hole 3 and the axis of the screw 1 are on a straight line, so that the anti-theft bolt can be more evenly stressed when the anti-theft bolt is driven to rotate by the dismantling screw.

The first side surface 5 is flat, and the extending direction of the first side edge 7 of the first side surface 5 to the second side edge 8 of the first side surface 5 passes through the circular recessed hole 3 . axis, as shown in Figure 3. The first side surface 5 is set to be flat, and the extended surface passes through the axis of the circular concave hole 3, so that the first side surface 5 is not easy to slip when being stressed, and the bolt head can be tightened by a common tool such as a wrench.

The extension surface of the first side surface 5 may also not pass through the axis of the circular concave hole 3, and may have a certain inclination. If it is inclined toward the direction close to the second side surface 6, it can also be tightened, but the force-bearing surface thereof is reduced, which increases the wear of the protrusion 4. It can also be inclined in a direction away from the second side surface 6, and when tightening it, the wrench and the like are not easily stressed and are easy to slide.

The first side surface 5 can also be an arc surface.

The protrusion 4 wraps the connecting part 2, so that common tools such as a wrench cannot directly contact the connecting part 2, thereby avoiding the possibility of screwing the connecting part 2 to remove the anti-theft bolt. The projection 4 can also extend beyond the second end face of the connecting portion 2 .

The concave hole 10 of the bolt tightening sleeve is adapted to the shape of the above-mentioned bolt head, as shown in FIG.

The second end of the screw 1 is provided with a hole for the screwing tool to extend into. As shown in Figure 2, when the anti-theft bolt is removed, a tool can be inserted into the hole to fix the anti-theft bolt, so that the anti-theft bolt can be reversely rotated and removed. Screw, the anti-theft bolt is separated from the removal screw, no other tools such as wrenches are needed to assist, and the operation is more convenient. The hole is an inner hexagonal hole 9, and an inner hexagonal wrench can be inserted for fixing.

The space 11 of the bolt tightening sleeve, the hole of the anti-theft bolt, and the through hole 12 of the dismantling screw are all for tools to be inserted, and their shapes can be matched with existing tools, such as square holes and hexagonal holes.

When installing anti-theft bolts, just put the bolt tightening sleeve on the bolt head of the anti-theft bolt, insert the screwing tool into the gap 11, turn it clockwise to tighten, and then remove the bolt tightening sleeve to complete the installation.

When the anti-theft bolt needs to be removed, insert the tool into the through hole 12 of the removal screw, and rotate the tool counterclockwise to loosen the anti-theft bolt by removing the screw, and then remove the anti-theft bolt. Insert the tool into the inner hexagonal hole of the anti-theft bolt and turn the tool in the opposite direction to separate the anti-theft bolt from the removal screw.

The above rotation direction can be actually operated according to the tightening direction of the external thread of the screw 1, or the anti-theft bolt can be installed counterclockwise and removed clockwise.

The screw 1, the bolt head, the connecting portion 2 and the at least two protrusions 4 can all be integrally formed. Between the bolt head and the screw rod 1, there may also be a limit part, etc., which can be designed according to the actual situation.

The above-mentioned fixed connection, which is not specified, may be a connection method such as riveting, welding, and bolt connection, and a movable connection may be a connection method such as hinged connection.

Claims (9)

1. An anti-theft bolt assembly, characterized in that, comprises

The anti-theft bolt comprises a screw rod (1) with external threads and a windmill-shaped bolt head; the bolt head comprises a columnar connecting part (2) and at least two bulges (4) extending outwards from the side surface of the connecting part (2); the first end face of the connecting part (2) is fixedly connected with the first end face of the screw (1), and the second end face is provided with an inward round concave hole (3); an internal thread is arranged in the circular concave hole (3), and the screwing direction of the internal thread is opposite to that of the external thread of the screw (1); the bulge (4) comprises a first side surface (5) and an arc-shaped second side surface (6); the first side (5) and the second side (6) share a first side (7), the first side (5) and the second side (6) of the adjacent protrusion (4) share a second side (8); the extending direction of the first side edge (7) of the second side surface (6) to the second side edge (8) of the second side surface (6) is consistent with the screwing direction of the external thread of the screw rod (1);

and the disassembling screw rod is used for disassembling the anti-theft bolt.

2. Anti-theft bolt assembly according to claim 1, characterized in that the axis of the circular recess (3) is in line with the axis of the threaded rod (1).

3. The anti-theft bolt assembly according to claim 2, characterized in that the first side face (5) is a plane, the first side edge (7) of the first side face (5) passing through the axis of the circular recess (3) in the direction of extension of the second side edge (8) of the first side face (5).

4. Anti-theft bolt assembly according to claim 1, characterized in that the second side face (6) is smooth surfaced.

5. Anti-theft bolt assembly according to claim 1, characterized in that the second end of the threaded rod (1) is provided with an aperture into which a turning tool can be inserted.

6. Anti-theft bolt assembly according to claim 5, characterized in that the aperture is an internal hexagonal hole (9).

7. An antitheft bolt assembly according to claim 1 further comprising a bolt tightening sleeve for mounting said antitheft bolt; an inward concave hole (10) is formed in one end face of the bolt fastening sleeve, and the concave hole (10) is matched with the end part of the bolt head; the other end surface is provided with a gap (11) for the screwing tool to extend into.

8. An anti-theft bolt assembly according to claim 1, characterized in that the first end of the dismounting screw is provided with an external thread adapted to the internal thread of the circular recess (3).

9. An anti-theft bolt assembly according to claim 1, characterised in that the second end of the dismounting screw is provided with a through hole (12) for a turning tool to extend into.

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