High-strength special-shaped anti-theft bolt and matched assembling and disassembling tool thereof

Abstract

The utility model discloses a high-strength special-shaped anti-theft bolt and a matched assembling and disassembling tool thereof, the anti-theft bolt comprises a special-shaped bolt and a special-shaped nut which is in threaded connection with the special-shaped bolt, and a head pulling and screwing clamping surface of the special-shaped bolt and a pulling and screwing clamping surface of the special-shaped nut both adopt Lello triangle outlines. The matched assembling and disassembling tool comprises a clamping head, a cylindrical clamping column and a clamping groove, wherein the clamping groove is formed in the cylindrical clamping column and matched with the pulling and screwing clamping face of the head of the special-shaped bolt and the pulling and screwing clamping face of the special-shaped nut in shape. Compared with the prior art, the high-strength special-shaped anti-theft bolt has the advantages that the high-strength special-shaped anti-theft bolt solves the problem that a fastener is stolen due to the fact that disassembly is convenient and fast, the head of the bolt cannot be directly rotated through an external conventional tool, and therefore the anti-theft performance of the whole stud is improved; and the structural design is ingenious, the installation procedures are consistent with the steps of a common fastener, the fastening requirement can be met, and the ideal anti-theft effect can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fasteners, and in particular relates to a high-strength special-shaped anti-theft bolt and a matching assembly and disassembly tool thereof. Background Art

[0002] High-strength bolt: a mechanical part, a cylindrical threaded high-strength fastener equipped with a nut. It consists of a head and a screw (a cylinder with external threads), which must be matched with a nut to fasten two parts with through holes. This type of connection is called a bolt connection. Bolts are divided into hexagonal head bolts, round head bolts, square head bolts, countersunk bolts, etc. according to the shape of the head. Hexagonal heads are the most commonly used, and countersunk heads are generally used in places with special connection requirements. Most existing bolts are universal bolts, which can be installed and removed using conventional tools.

[0003] High-strength bolts are made of alloy materials by cold-pressing with cold heading equipment. Large-volume bolts are heavy, have a considerable recycling price, and are easy to disassemble. Therefore, there is a problem of theft of high-strength bolts tightened on industrial equipment or outdoor building facilities. To avoid the above situation, existing anti-theft bolts use unconventional hole-shaped bands for anti-theft, and set anti-theft columns in the hexagonal holes to prevent conventional tools from being inserted into the hexagonal holes.

[0004] At present, a Chinese patent with the announcement number CN217873651U discloses an anti-theft bolt, comprising a bolt body, a nut is threadedly connected to the outer surface of the bolt body, a first mounting plate is attached to the outer surface of the nut, a limiting mechanism is arranged inside the first mounting plate, the upper surface of the first mounting plate abuts against the second mounting plate, the upper surface of the second mounting plate abuts against the rod sleeve, the upper surface of the rod sleeve abuts against the cover plate, the lower surface of the cover plate is fixed with a fixing plate, a fixing mechanism is arranged inside the fixing plate, and the fixing mechanism includes two first grooves opened on the lower surface of the fixing plate. The anti-theft bolt, through the fixing mechanism, the clamping block will contact the inside of the rod sleeve during the downward movement, the clamping block moves together with the moving block, and compresses the first spring, when the cover plate abuts against the rod sleeve, the clamping block is reset and clamped into the inside of the first clamping groove, completing the fixing of the cover plate and the rod sleeve, effectively preventing the bolt body from being opened by tools, which is conducive to anti-theft.

[0005] The Chinese patent with the announcement number CN117108616A discloses an anti-theft bolt, including a bolt and a nut body connected by threads, the nut body including a cylindrical base, the front and rear sides of the top of the base are provided with sliding grooves, the sliding grooves are slidably connected with sliding blocks, the moving blocks include a moving body, a pipe column is provided in the middle of the moving body, and the left and right sides of the moving body are provided with connecting platforms inserted into the positioning grooves. The utility model arranges a moving block in the nut body, the nut body is continuously tightened, and the moving block drives the sliding block to continuously shrink, so that the insertion platform is firmly inserted into the nut cap, so that the bolt, the nut body and the nut cap are combined into a whole, and have good anti-theft performance. By rotating the nut body in the opposite direction, the insertion platform at the end of the adjusting rod is quickly separated from the nut cap, so that the bolt is quickly disassembled and the convenience of bolt application is improved.

[0006] However, in the implementation of relevant technologies, it was found that the above-mentioned anti-theft bolts have the following problems: the installation process of the above-mentioned solution is relatively complicated, and multiple parts are required for assembly and use, which may easily lead to the loss of parts and the loosening of the contact points between the bolts and the objects, thereby failing to meet the needs, reducing the efficiency of use, wasting installation time, and the anti-theft effect is not ideal. Utility Model Content

[0007] In order to overcome the above-mentioned shortcomings of the prior art, the utility model proposes a high-strength special-shaped anti-theft bolt and a matching assembly and disassembly tool thereof.

[0008] The utility model adopts the technical scheme to solve the technical problem: a high-strength special-shaped anti-theft bolt, comprising a special-shaped bolt and a special-shaped nut threadedly connected with the special-shaped bolt, wherein the head wrenching clamping surface of the special-shaped bolt and the wrenching clamping surface of the special-shaped nut both adopt the Lello triangle profile.

[0009] Furthermore, the head transition surface of the special-shaped bolt adopts a rounded transition.

[0010] Furthermore, each transition surface of the special-shaped bolt is rounded.

[0011] Furthermore, each transition surface of the special-shaped nut is rounded.

[0012] The utility model also provides a matching loading and unloading tool for high-strength special-shaped anti-theft bolts, including a clamping head, a cylindrical clamping column, and a clamping groove on the cylindrical clamping column that matches the shape of the special-shaped bolt head wrench clamping surface and the special-shaped nut wrench clamping surface.

[0013] Furthermore, the clamping groove is opened along the axis of the cylindrical clamping column to the bottom of the cylindrical clamping column.

[0014] Furthermore, in the axial direction of the matching loading and unloading tool, the size of the clamping head is larger than the size of the cylindrical clamping column, and the size of the cylindrical clamping column is larger than the size of the clamping groove.

[0015] Furthermore, the bottom of the clamping groove adopts a rounded transition.

[0016] Furthermore, the side surfaces of the clamping groove adopt rounded transition.

[0017] Furthermore, each transition surface of the clamping groove is rounded.

[0018] Compared with the prior art, the positive effects of the utility model are:

[0019] The high-strength special-shaped anti-theft bolt provided by the utility model solves the problem of fastener theft caused by convenient disassembly. External conventional tools cannot directly turn the bolt head, thereby improving the overall anti-theft performance of the stud and effectively solving the problems involved in the background technology.

[0020] The installation process of the existing anti-theft bolt assembly is relatively complicated, and multiple small parts need to be assembled before use, which can easily lead to the loss of parts. The increase in parts is more likely to cause the contact point between the bolt and the object to loosen, thus failing to meet the tightening requirements, which not only reduces the efficiency of use, but also wastes installation time, and the anti-theft effect is not ideal. The anti-theft bolt structure of the utility model is cleverly designed, and the installation process is consistent with the steps of ordinary fasteners. Since unconventional installation tools are used for pre-tightening, it is not easy to disassemble using common clamping tools such as pliers or wrenches. It can not only meet the tightening requirements, but also play an ideal anti-theft role.

[0021] The high-strength special-shaped anti-theft bolt provided by the utility model adopts an unconventional Lello triangle on the head, which achieves the purpose of inconvenient quick disassembly of fasteners, thereby solving the problem of theft of high-strength bolts on industrial equipment or open-air building facilities. The high-strength special-shaped anti-theft bolt is suitable for connecting parts in special environments such as open air, unattended and large infrastructure. Lawbreakers cannot disassemble and steal it with existing conventional pipe clamps or wrenches, thereby improving the anti-theft performance and avoiding major safety accidents and large economic property losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0023] Figure 1 It is a three-dimensional assembly schematic diagram of a high-strength special-shaped anti-theft bolt of the utility model;

[0024] Figure 2 is a schematic structural diagram of a special-shaped bolt 100;

[0025] Figure 3 2 is a schematic diagram of the structure of the special-shaped nut 200.

[0026] Figure 4It is a structural schematic diagram of a special loading and unloading tool 300 for high-strength special-shaped anti-theft bolts;

[0027] The reference numerals in the figure include: special-shaped bolt 100, bolt head 101, head wrench clamping surface 102, non-threaded screw 103, threaded screw 104, special-shaped nut 200, wrench clamping surface 201, internal thread 202, nut supporting surface 203, matching loading and unloading tool 300, clamping head 301, cylindrical clamping column 302, clamping groove 303. DETAILED DESCRIPTION

[0028] like Figure 1 As shown, a high-strength special-shaped anti-theft bolt assembly is composed of a special-shaped bolt 100 and a matching special-shaped nut 200.

[0029] like Figure 2 As shown, the special-shaped bolt 100 is composed of a bolt head 101, a head wrench clamping surface 102, a non-threaded screw 103, and a threaded screw 104. The transition surface of the bolt head 101 adopts a rounded transition, which fits the bottom rounded corner of the clamping groove 303 of the special loading and unloading tool 300, but the contact surface with the conventional tool is small. The head wrench clamping surface 102 adopts a Lello triangle profile, which fits the side of the clamping groove 303 of the special loading and unloading tool, but the contact surface with the conventional tool is small. The other transition surfaces are rounded, which not only meets the requirements of smooth transition, but also improves the anti-theft performance. It is impossible to clamp it using a conventional clamping tool to remove the special-shaped anti-theft bolt.

[0030] like Figure 3 As shown in the figure, the special-shaped nut 200 used in conjunction with the special-shaped bolt 100 is composed of a wrench clamping surface 201, an internal thread 202, and a nut support surface 203. The wrench clamping surface 201 adopts a Lello triangle profile, which fits the side of the special loading and unloading tool clamping groove 303, but the contact surface with the conventional tool is small. The internal thread 202 matches the specifications of the threaded screw 104 of the high-strength special-shaped anti-theft bolt 100. The rest of the transition surfaces are rounded to meet the requirements of smooth transition and improve the assembly adaptability with the bottom rounded corners of the special loading and unloading tool clamping groove 303.

[0031] like Figure 4As shown, a high-strength special-shaped anti-theft bolt matching loading and unloading tool 300 is composed of a clamping head 301, a cylindrical clamping column 302, and a clamping groove 303 whose shape matches the clamping surface 102 of the special-shaped bolt head or the clamping surface 201 of the special-shaped nut. The clamping groove 303 is opened along the axis of the cylindrical clamping column 302 to the bottom of the cylindrical clamping column. In the axial direction of the special loading and unloading tool 300, the clamping head 301 is larger than the size of the cylindrical clamping column 302, and the cylindrical clamping column 302 should be larger than the size of the clamping groove 303. The remaining transition surfaces are rounded to improve the assembly adaptability with the bolt head 101 of the high-strength special-shaped anti-theft bolt 100, the clamping surface 201 of the nut 200 matching the high-strength special-shaped anti-theft bolt, and the rounded transition surface.

[0032] When fastening and connecting two parts with through holes, the threaded screw 104 and the non-threaded screw 103 of the high-strength special-shaped anti-theft bolt 100 pass through the through holes in turn, and the bolt head 101 forms a gap assembly with the part with the through hole. At the same time, the high-strength special-shaped nut 200 is coaxially tightened along the threaded screw 104 to play a tightening role. Use the special loading and unloading tool 300 for special-shaped anti-theft bolts to pre-tighten the fasteners, and the clamping groove 303 should match the wrench clamping surface 102 of a high-strength special-shaped anti-theft bolt 100, or the clamping groove 303 should match the wrench clamping surface 201 of a high-strength special-shaped anti-theft bolt nut 200. After reaching the set pre-tightening force, the special loading and unloading tool 300 is withdrawn along the axial direction.

[0033] The working principle of the utility model is:

[0034] The high-strength special-shaped anti-theft bolt provided by the utility model has a special triangular prism structure for the bolt head and the special-shaped nut, and adopts a Lello triangle as the bottom surface. When conventional tools are used to clamp the bolt head and the side surface of the special-shaped nut, it is inconvenient to tighten and disassemble due to the limited contact surface, thereby achieving an anti-theft effect.

Claims

1. A high-strength special-shaped anti-theft bolt, characterized in that: It includes a special-shaped bolt and a special-shaped nut threadedly connected to the special-shaped bolt. The head wrench clamping surface of the special-shaped bolt and the wrench clamping surface of the special-shaped nut both adopt the Lello triangle profile; the head transition surface of the special-shaped bolt adopts rounded transition; and each transition surface of the special-shaped bolt is rounded.

2. A high-strength special-shaped anti-theft bolt according to claim 1, characterized in that: All transition surfaces of the special-shaped nuts are rounded.

3. A matching loading and unloading tool based on the high-strength special-shaped anti-theft bolt according to claim 1, characterized in that: The utility model comprises a clamping head, a cylindrical clamping column and a clamping groove which is arranged on the cylindrical clamping column and matches the shapes of the wrenching clamping surfaces of the special-shaped bolt head and the special-shaped nut.

4. The matching assembly and disassembly tool for high-strength special-shaped anti-theft bolts according to claim 3 is characterized in that: The clamping groove is opened along the axis of the cylindrical clamping column to the bottom of the cylindrical clamping column.

5. The matching assembly and disassembly tool for high-strength special-shaped anti-theft bolts according to claim 3 is characterized in that: In the axial direction of the matching loading and unloading tool, the size of the clamping head is larger than the size of the cylindrical clamping column, and the size of the cylindrical clamping column is larger than the size of the clamping groove.

6. The matching assembly and disassembly tool for high-strength special-shaped anti-theft bolts according to claim 3 is characterized in that: The bottom of the clamping groove adopts a rounded transition.

7. The matching assembly and disassembly tool for high-strength special-shaped anti-theft bolts according to claim 3 is characterized in that: The side surfaces of the clamping groove adopt rounded transition.

8. The matching assembly and disassembly tool for high-strength special-shaped anti-theft bolts according to claim 3 is characterized in that: All transition surfaces of the clamping groove are rounded.

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