CN101504028A - Anti-demounting bolt and screwing tool - Google Patents

Abstract

The invention discloses an anti-disassembly bolt and a tightening tool. It includes a bolt and a nut. Both the bolt head and the nut are cylindrical, and the outer end faces of the cylindrical bolt head and the nut are provided with one-way ratchet-shaped inclined steps. On the tightening surface, there are sleeves with a rotating fit on the outer circular steps of the inner end surface between the bolt head and the nut, and a cover is tightly fitted in the outer port of the sleeve, and two can be inserted into each The socket wrench is locked in the sleeve with the ratchet-shaped inclined step tightening surface, and the tail end surface of each socket wrench is respectively provided with a square hole that can be inserted into a conventional socket wrench. The bolt of the invention can only be fastened and fixed before the cover is fastened, and cannot be disassembled with any tool, so the anti-theft performance is more reliable.

Description

Anti-disassembly bolt and tightening tool

Technical field:

The invention relates to fastening or fixing components, in particular to an anti-disassembly bolt and a tightening tool suitable for fixing on power line iron towers and other field facilities.

Background technique:

The anti-theft bolts currently used in field facilities are equipped with a round sleeve around the nut of the standard hexagonal bolt to protect the nut and prevent others from dismantling the bolt with a wrench and stealing the equipment. A special socket wrench is prepared for installation and disassembly. . The problem with this structure is that it is easy to imitate the box wrench, and other forms of anti-theft bolts can not be anti-theft because of the leakage of the special dismounting tool.

Invention content:

The object of the present invention is to provide a disassembly-resistant bolt and a tightening tool that can only be screwed and fixed by tools, and the bolts and nuts cannot be dismantled by any tool.

The technical scheme of the present invention is accomplished in the following manner, which includes bolts and nuts, and is characterized in that: the bolt heads and nuts are both cylindrical, and the outer end faces of the cylindrical bolt heads and nuts are all provided with a one-way ratchet On the tightening surface of the inclined step, a rotating sleeve is respectively sleeved on the outer circular step of the inner end surface between the bolt head and the nut, and a cover is tightly fitted in the outer port of the sleeve, and two can be respectively A socket wrench that is inserted into each sleeve and locked by the ratchet-shaped inclined step tightening surface, and a square hole that can be inserted into a conventional socket wrench is respectively provided on the end surface of the tail of each socket wrench. The bolt of the invention can only be fastened and fixed before the cover is fastened, and cannot be disassembled with any tool, so the anti-theft performance is more reliable.

Description of drawings:

Fig. 1 is the structural representation of bolt of the present invention,

Fig. 2 is the structural representation of screwing socket wrench of the present invention,

Fig. 3 is the structural representation of bolt head and screw rod,

Fig. 4 is a structural schematic diagram of a nut.

Detailed ways:

The embodiment is further described in conjunction with the accompanying drawings. In the present invention, both the bolt head 1 and the nut 3 of the existing bolt are made into cylindrical shapes, and the outer end surfaces of the cylindrical bolt head and the nut are all processed with a one-way ratchet-like slope step tightening surface. 6. On the outer circular steps of the inner end surface between the bolt head and the nut, a rotating sleeve 4 is installed respectively, and a cover 5 is tightly fitted in the outer port of each sleeve, and two more can be inserted separately. A socket wrench 7 that is locked and tightened with the ratchet-shaped inclined step tightening surface in each sleeve, and a square hole 8 that can be inserted into a conventional socket wrench is respectively provided in the middle of the tail end face of each socket wrench. When in use, first put two socket wrenches on the bolt head and the nut respectively, first insert the screw rod 2 into the mounting hole of the fixing part and install the nut, and use the two socket wrenches to connect the ratchet-shaped slope steps of the bolt head and the nut respectively. Tighten the surface to occlude, take out the socket wrench after tightening and fixing, and finally fit and fix the two covers in the ports of the two sockets respectively, so as to prevent any tools from being disassembled.

Claims (1)

1. An anti-disassembly bolt and tightening tool, which includes a bolt and a nut, is characterized in that: the bolt head and the nut are both cylindrical, and the outer end surfaces of the cylindrical bolt head and the nut are equipped with a one-way ratchet. On the tightening surface of the inclined step, a rotating sleeve is respectively sleeved on the outer circular step of the inner end surface between the bolt head and the nut, and a cover is tightly fitted in the outer port of the sleeve, and two can be respectively A socket wrench that is inserted into each sleeve and locked by the ratchet-shaped inclined step tightening surface, and a square hole that can be inserted into a conventional socket wrench is respectively provided on the end surface of the tail of each socket wrench.

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