CN201236877Y - Anti-theft bolt fastener - Google Patents

Abstract

The utility model provides an anti-theft screw fastener, which relates to an anti-theft fastener used for connection in mechanical engineering. The anti-theft fastener comprises an anti-theft nut and a special tool, wherein the anti-theft nut is truncated cone shaped, a truncated cone fitted with the truncated cone of the nut is arranged inside the special tool, a hexangular clamping chuck is arranged at the front end, and a disassembling hole is formed in the middle. A bolt is screwed into the bolt hole in the middle of the anti-theft nut by using the anti-theft fastener, the anti-theft nut is clamped into the truncated cone hole in the middle of the special tool, and tightened up continuously via the hexangular clamping chuck through a spanner, the bolt is continuously pushed to the bolt hole in the middle of the anti-theft nut, after the bolt is pushed to the required position, a wedge plate is inserted into the disassembling hole, and the tail part of the special tool is knocked to withdraw the special tool. Because the anti-theft nut of the anti-theft fastener is truncated cone shaped, the anti-theft fastener can not be disassembled no matter by using a spanner or a pipe wrench, thereby achieving the anti-theft purpose. The anti-theft fastener has the advantages of scientific and reasonable structure and convenient use.

Description

The anti-theft bolt fastening piece

Technical field

The utility model relates to the anti-theft fastening piece that a kind of mechanical engineering connects.

Background technique

The anti-theft bolt that has anti-theft feature now has been widely used in mechanical connection, and its mentality of designing is different, and effect is also inequality, but all more or less all has some defectives, and anti-theft effect is not obvious.The having of patent applied for " a kind of motor anti-theft bolt " (Chinese patent application 200620161126), by bolt, bolt hole with exempt from tight nut and form, anti-theft bolt top is made as taper, and the middle part is made as the cylindrical of band male thread, and the bottom is made as many prismatics; Bolt hole on the motor is made as the cone shape hole that is complementary with the bolt taper; Exempt from tight nut and be made as convex, its top is rectangle, and its underpart is circular, and vertical center is provided with the box thread that cooperates with the bolt male thread, exempts from tight nut projection and is inserted in the sliding-rail groove of motor slide track seat." a kind of anti-theft nut and special spanner thereof " (Chinese patent application 200620128113), anti-theft nut comprises that outer side surface is the round platform post shapes, the nut body of platform in wherein an end face of this round platform post is provided with, and the sidewall of platform is many ribs structure in being somebody's turn to do.It is that many ribs structure, inner side surface are that the cylindrical shell of cylindrical surface structure and the handle that is combined as a whole with it constitute that supporting with it special spanner includes outer side surface.

Summary of the invention

The purpose of this utility model is at above-mentioned present situation, aims to provide a kind ofly can satisfy the mechanical connection requirement, has the anti-theft bolt fastening piece of strong anti-theft feature again.

The implementation of the utility model purpose is, the anti-theft bolt fastening piece is made up of anti-theft nut and special tool, and anti-theft nut is a frustoconic shape, have in the described special tool with the nut round platform to the round platform that coincide, front end has the hexagonal chuck, there is removal hole the centre.

Use the utility model makes, bolt is screwed in the middle screw of anti-theft nut, again anti-theft nut is sticked into the middle round platform hole of special tool, by the hexagonal chuck, constantly to tighten with spanner, the bolt constantly screw in the middle of anti-theft nut advances, after being advanced to desired location, wedge is inserted removal hole, knock the afterbody of special tool, special tool is withdrawed from.Because anti-theft nut profile of the present utility model is a frustoconic shape, using spanner still is that pipe wrench all can't unload it, thereby realizes antitheft purpose.

The utility model is scientific and reasonable for structure, easy to use.

Description of drawings

Fig. 1 is the utility model structural representation

Fig. 2 is the wedge structural representation

Embodiment

With reference to Fig. 1, the utility model is made up of anti-theft nut 3 and special tool 1, and anti-theft nut is a frustoconic shape, have in the described special tool with the nut round platform to the round platform that coincide, front end has hexagonal chuck 5, there is removal hole 4 centre.

Use the utility model makes, bolt 2 is screwed in the screw of anti-theft nut 3 centres, again anti-theft nut is sticked into the round platform hole of special tool 1 centre, by hexagonal chuck 5, constantly to tighten with spanner, the bolt 3 constantly screw in the middle of anti-theft nut advances, after being advanced to desired location, wedge shown in Figure 26 is inserted removal hole 4, knock the afterbody of special tool 1, special tool is withdrawed from.Because anti-theft nut profile of the present utility model is a frustoconic shape, using spanner still is that pipe wrench all can't unload it, thereby realizes antitheft purpose.

Claims (1)

1, anti-theft bolt fastening piece is characterized in that being made up of anti-theft nut and special tool, and anti-theft nut is a frustoconic shape, have in the described special tool with the nut round platform to the round platform that coincide, front end has the hexagonal chuck, there is removal hole the centre.

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