Corrosion-resistant anti-theft bolt

Abstract

The utility model provides a corrosion-resistant anti-theft bolt, which relates to the technical field of fasteners and comprises a cylinder, a threaded section, a smooth section and a groove, internal threads are arranged inside the groove, the screwing direction of the threaded section on the outer surface of the cylinder is opposite to that of the internal threads on the groove, and an anti-skidding edge is arranged on the outer surface of the smooth section of the cylinder. The outer surface of the side, close to the cylindrical thread section, of the anti-skid edge is provided with spline teeth, the hexagonal screw head is located on one side of the anti-skid edge, and the hexagonal screw head is connected with the anti-skid edge through a plurality of contacts. Meanwhile, a fastened part can also shield the bolt, only a small part of the anti-skid edge of the bolt is exposed, the anti-skid edge is thin, the distance between the anti-skid edge and the part is small, the anti-skid edge is difficult to clamp through a common tool, and therefore the situation that the bolt is disassembled by clamping the anti-skid edge can be avoided; and the anti-theft capability is improved.

Description

Technical Field

[0001] This utility model relates to the field of fastener technology, specifically a corrosion-resistant and anti-theft bolt. Background Technology

[0002] A bolt consists of a head and a threaded shank, which can connect two parts with through holes by means of a matching nut, and can also fix one part with a through hole to another part with a threaded hole.

[0003] Existing anti-theft bolts have a circular head with a groove inside. The bolt can be turned by the matching groove and the matching rod, thereby improving the anti-theft capability. However, due to the thickness of the head, the surface of the bolt head can still be damaged by tools such as pliers, increasing the friction between the bolt head and the bolt and removing the bolt. Therefore, this application proposes an anti-theft bolt to improve this. Utility Model Content

[0004] The purpose of this invention is to provide a corrosion-resistant and anti-theft bolt, which aims to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: the corrosion-resistant anti-theft bolt includes a cylinder, the outer surface of which includes a threaded section and a smooth section. A groove is formed inside the smooth section of the cylinder, and an internal thread is provided inside the groove. The rotation direction of the threaded section on the outer surface of the cylinder is opposite to the rotation direction of the internal thread on the groove. An anti-slip edge is provided on the outer surface of the smooth section of the cylinder. The anti-slip edge has a serrated edge on the outer surface near the threaded section of the cylinder. It also includes a hexagonal screw head located on one side of the anti-slip edge. The hexagonal screw head is connected to the anti-slip edge through multiple contact points.

[0006] Preferably, the contacts are provided with six points, the contacts are integrally formed with the hexagonal screw head, and the contacts are connected to the anti-slip edge by welding.

[0007] Preferably, the inner and outer surfaces of the cylinder and the outer surface of the anti-slip edge are all coated.

[0008] Preferably, the thickness of the anti-slip edge is 2mm.

[0009] Preferably, the anti-slip edge has a chamfer on the side near the hexagonal screw head.

[0010] The beneficial effects of this utility model are:

[0011] After the bolt is fixed, most of its body is located inside the threaded hole of the equipment. At the same time, the fastened parts can also cover the bolt. Only a small part of the anti-slip edge of the bolt is exposed. The anti-slip edge has a relatively thin thickness and is kept close to the parts, making it difficult to clamp the anti-slip edge with ordinary tools. Therefore, it can avoid removing the bolt by clamping the anti-slip edge, thus improving the anti-theft capability. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a specific embodiment of the present utility model.

[0013] Figure 2 This is a schematic diagram showing the connection between the hexagonal screw head and the anti-slip edge.

[0014] Figure 3 It is a cross-sectional view of a cylinder.

[0015] In the diagram: 1. Cylindrical section; 2. Threaded section; 3. Smooth section; 4. Groove; 5. Internal thread; 6. Anti-slip edge; 7. Sprocket; 8. Hexagonal screw head; 9. Contact point. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings.

[0017] like Figure 1-3 As shown, a corrosion-resistant anti-theft bolt includes a cylinder 1. The outer surface of the cylinder 1 includes a threaded section 2 and a smooth section 3. The smooth section 3 of the cylinder 1 has a groove 4 inside, and the groove 4 has an internal thread 5 inside. The direction of rotation of the threaded section 2 on the outer surface of the cylinder 1 is opposite to the direction of rotation of the internal thread 5 on the groove 4. The outer surface of the smooth section 3 of the cylinder 1 is provided with an anti-slip edge 6. The outer surface of the anti-slip edge 6 near the threaded section 2 of the cylinder 1 is provided with a tooth 7. It also includes a hexagonal screw head 8 located on one side of the anti-slip edge 6. The hexagonal screw head 8 is connected to the anti-slip edge 6 through multiple contacts 9.

[0018] When fixing one part to another device with bolts, first, the front end of the threaded section 2 of the cylinder 1 is passed through the through hole on the part. Then, the front end of the threaded section 2 is screwed partially into the threaded hole on the device. Next, using a regular wrench or a hexagonal socket wrench with a hexagonal screw head 8, the threaded section 2 of the cylinder 1 and most of the smooth section 3 of the bolt are screwed into the threaded hole on the device, and the spline 7 is pressed tightly against the surface of the part. This completes the fixing of the part. To improve anti-theft capabilities, further torque is applied to make the spline 7 fit even more tightly against the part. As torque is applied, the hexagonal screw... The contact point 9 connecting the head 8 and the anti-slip edge 6 breaks, and then the hexagonal screw head 8 is completely removed from the anti-slip edge 6. That is, the hexagonal screw head 8 is only responsible for screwing in the bolt. When it is necessary to remove the bolt, a special tool is required. The tool here is a T-shaped rocker arm. One end of the rocker arm has an external thread. The external thread on the rocker arm can cooperate with the internal thread 5 in the groove 4. When the front end of the rocker arm abuts against the inner bottom of the groove 4, the rocker arm cannot continue to screw in the groove 4. At this time, the rocker arm is connected to the cylinder 1 as a whole. Then, continue to rotate the rocker arm in the same direction, so that the cylinder 1 can be screwed out of the threaded hole on the equipment.

[0019] The torque required for contact 9 to break exceeds the torque required for the bolt to be fully tightened. Therefore, contact 9 will not break and fail prematurely before the bolt is fully tightened.

[0020] By setting a smooth section 3 on the cylinder 1, it is convenient to open an internal thread 5 in the groove 4, thus avoiding interference between the internal thread 5 in the groove 4 and the external thread on the cylinder 1.

[0021] Furthermore, there are six contacts 9. The contacts 9 are integrally formed with the hexagonal screw head 8. The contacts 9 are connected to the anti-slip edge 6 by welding. Since the contacts 9 are fixed to the anti-slip edge 6 by welding, when a certain torque is applied to the hexagonal screw head 8, the contact point between the contacts 9 and the anti-slip edge 6 will break. The contacts 9 will not break from the hexagonal screw head 8. Therefore, the hexagonal screw head 8 can be recycled and re-welded to the anti-slip edge 6.

[0022] Furthermore, the inner and outer surfaces of cylinder 1 and the outer surface of anti-slip edge 6 are coated to improve the corrosion resistance of the bolt.

[0023] Furthermore, the anti-slip edge 6 has a thickness of 2mm. With this thickness, the anti-slip edge 6 can prevent unauthorized personnel from forcibly clamping the anti-slip edge 6 to remove bolts when in use.

[0024] Furthermore, the edge of the anti-slip edge 6 near the hexagonal screw head 8 is chamfered, which prevents tools such as wrenches from gripping the anti-slip edge 6.

[0025] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 based on the specific circumstances.

Claims

1. A corrosion-resistant anti-theft bolt, characterized in that, The device includes a cylinder, the outer surface of which includes a threaded section and a smooth section. The smooth section of the cylinder has a groove inside, and the groove has an internal thread. The direction of rotation of the threaded section on the outer surface of the cylinder is opposite to the direction of rotation of the internal thread on the groove. The smooth section of the cylinder has an anti-slip edge on its outer surface. The anti-slip edge has a serrated edge on the outer surface near the threaded section of the cylinder. The device also includes a hexagonal screw head located on one side of the anti-slip edge. The hexagonal screw head is connected to the anti-slip edge through multiple contact points.

2. The corrosion-resistant anti-theft bolt according to claim 1, characterized in that, The contact points are provided in six parts, and the contact points are integrally formed with the hexagonal screw head. The contact points are connected to the anti-slip edge by welding.

3. The corrosion-resistant anti-theft bolt according to claim 1, characterized in that, The inner and outer surfaces of the cylinder, as well as the outer surface of the anti-slip edge, are all coated.

4. The corrosion-resistant anti-theft bolt according to claim 1, characterized in that, The thickness of the anti-slip edge is 2mm.

5. The corrosion-resistant anti-theft bolt according to claim 4, characterized in that, The anti-slip edge has a chamfer on the side near the hexagonal screw head.

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