Tooth shaped structure of screwing tool

By designing a polygonal structure and an arc-shaped groove in the socket of the screwing tool, combined with the groove and the top surface, the problem of screw slippage and wear caused by stress concentration is solved, and the stability of normal and rounded screws is achieved. Turn and protect.

CN101332591AInactive Publication Date: 2008-12-31谢智庆
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
谢智庆
Filing Date
2007-06-25
Publication Date
2008-12-31
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The design of existing screw-fastening tools can easily lead to stress concentration, causing the screws to slip or round, and it is difficult to effectively prevent wear, especially when tightening worn screws.

Method used

The polygonal structure of the sleeve is adopted, and arc-shaped grooves are provided at the corners of the edges. The first and second grooves and the top surface are set between adjacent grooves to avoid stress concentration at the corners of the screws and ensure that the screws are tightened. There are multiple contact surfaces during rotation to reduce wear and slip.

Benefits of technology

It effectively avoids rounding and wear of screws caused by stress concentration, and can smoothly turn normal and rounded screws, extending the service life of the tool.

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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 escape groove 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.
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