Tooth shaped structure of screwing tool

Abstract

The invention discloses a tooth-shaped structure of a bolt fixing tool. The tooth-shaped structure comprises a drive part, a looping part is concavely arranged inside the drive part; the inner periphery of the looping part is a hollow structure and is approximately a polygonal structure, the intersectional angle between edges of the polygonal structure of the looping part are respectively provided with an escape groove, the escape groove is a recessed arc structure, an opening of the escape groove and an opening of the adjacent escape groove take on a straight edge, the straight edge is a lank line section; a top surface is respectively arranged at the center of the straight edges between two adjacent escape grooves, the top surface is in a planar straight line section structure, the top surface is arranged at the straight edge between the two adjacent escape grooves and is superposed on the straight edge; a first groove and a second groove are respectively recessed between the escapegroove and the top surface, the first groove is closer to the escape groove, the second groove is closer to the top surface, the first and the second grooves are arranged in line symmetry with another first and second grooves; based on the intermediate vertical line of the distance between the two side walls of the escape groove with the arc structure, the first and the second grooves are arranged in line symmetry with another first and second grooves by the central vertical line of the distance between the two side walls of the arc structure of the escape grooves. The tooth-shaped structure of a bolt fixation tool can not cause slipping and bruting of the bolt fixing part resulting from the stress concentration of point contact.

Description

technical field [0001] The invention relates to a screw tool tooth structure. Background technique [0002] In order to overcome the shortcoming that the screw is easy to slip, avoid wearing the corners of the screw, and even further to make the sleeve part used to pull the worn screw, various hand tool manufacturers have developed various designs one after another. Such as China Taiwan Patent No. 093219645 "Sleeve for Preventing Nut Head Damage", it is provided with a fitting hole at one end of the sleeve for the nut head to engage, and the other end of the sleeve is provided with a connecting hole for hand The locking part of the tool is engaged and driven, and the sleeve is driven by the hand tool to make the nut head rotate at the same time. The improvement is that the inwardly tapered fitting hole corresponds to the corner of the nut head. The dodge groove is used for the dodge of the corners of the nut head, and the center of each side of the nut head corresponding to...

AI Technical Summary

Problems solved by technology

[0005] However, the bottom angle of the notch of this existing wrench is set at a slightly right angle. Obviously, this kind of overall structural proportion design is likely to cause stress concentration, so it is not practical. Difficulties in manufacture, i.e., difficulty in shaping, whether by milling or casting

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