CN2288047Y

CN2288047Y - Anti-sliding open end wrench

Info

Publication number: CN2288047Y
Application number: CN 97201542
Authority: CN
Inventors: 谢智庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-03-03
Filing date: 1997-03-03
Publication date: 1998-08-19
Anticipated expiration: 2007-03-03

Abstract

The utility model relates to an anti-skid open spanner. One side of both sides of an opening of the spanner is made into convex shallow square waveshape, and the other side of both sides of the opening of the spanner is made into two convex circular arc shapes corresponding to the center of the top surface of the previous side. An upper and a lower central lines of the opening of the spanner are deviated from each other by the dimension of delta A, the deepness is larger than the diagonal dimension of a screw head to be wrenched, and a bottom is in the shape of a groove. The utility model can be used for wrenching screw heads which are worn severely, and the screw heads are held and clamped in the opening. The utility model avoids the defect that the spanner is easy to fall when the spanner is used. The utility model has the advantages of convenient use, easy manufacture and remote possibility of abrasion.

Description

A kind of anti-skidding open-end wrench

A kind of anti-skidding open-end wrench, it belongs to hand-held tool spanner field, particularly a kind of existing single head of spanner or double end hexagon fork spanner of preventing sliding stop, because it is easy to use, extensively be used in machinery and the motor repair trade, it generally is designed to opening shape both sides is plane form, thereby in use exists screwing type and unclamp and be worn or when producing the hex(agonal)screw head of fillet, be prone to the phenomenon of sliding and being difficult for pulling.Must repair by other instruments and file or screw out with other pincers worker methods.And in operation because the acting surface less friction is also little, when discontinuous the exerting pressure of carelessness, hand loosens spanner promptly can cause spanner because gravity own breaks away from automatically by the phenomenon of falling of rotary screw head, and face causes the inconvenience in the work.

The purpose of this utility model is to propose a kind of two kinds of geometries to be made in the wrench opening both sides, two and opening upper and lower end center staggered mutually, screw terminal is formed rank card form, overcome existing spanner and be difficult for pulling worn and torn screw terminal and the easy weak point of falling that produces.

The utility model is realized in the following way, to pull a mouthful opening, the plane-parallel side in both sides is made two shallow square waveforms of projection, opposite side is made two shallow circular arcs of projection, two shallow circular arcs are corresponding just at center, square waveform top, on the opening, and a △ A of lower end misalignment size, the opening degree of depth is that its bottom is the arc groove shape greater than waiting to pull square dihedral screw terminal diagonal-size.

This utility model has the following advantages, it is except that can pulling normal screw terminal and can pull be worn serious bolt head or nut easily, because its work is rank card state, thereby the spanner that does not produce when reason carelessness or the discontinuous application of force falls phenomenon, it is simple in structure, is easy to make.

Description of drawings:

Accompanying drawing 1, the utility model stereogram

Accompanying drawing 2, the utility model are pulled the screw terminal schematic diagram that weares and teares

Accompanying drawing 3, the utility model are pulled normal screw terminal schematic diagram

In conjunction with the accompanying drawings a kind of anti-skidding open-end wrench of the utility model is described further below by embodiment: two shallow rectangular wave 111 shapes of in accompanying drawing 1, making projection on 5 liang of plane-parallel sides 11 of opening of spanner, make two shallow circular-arc projection bags 121 of projection on the opposite side plane 12, in the wave crest of two corresponding shallow rectangular waves 111 on another side 11 of shallow arc position in the heart, the center line of opening 5 top and bottom, a △ A of position deviation size.The degree of depth of opening 5 is greater than the diagonal-size of bright mild steel hexagonal nuts to be pulled or head.The bottom is an arc groove 13.This spanner is at work by shallow square waveform 111 on the side 11 and respective side 12 shallow circular arcs 121, constitute two acting surfaces or line mutually, thereby be easy to pull the more serious turret head 3 (referring to accompanying drawing 2) that worn and torn, when the upper end screw head enters the circular arc position, its center △ A moves the rank card effect that forms to side, thereby spanner 1 can not cause come off (referring to Fig. 2,3) accidentally from hand the time.

Claims

A kind of anti-skidding open-end wrench, it is characterized in that wrench opening (5) both sides parallel plane one sides (11) are made two shallow square waveforms (111) of projection, opposite side (12) is made two shallow circular arcs (121) of projection, and two shallow circular arcs are corresponding just at shallow square wave crest center, a △ A of opening (5) upper and lower end misalignment size, the opening degree of depth is that its bottom is arc groove shape (13) greater than waiting to pull regular hexagon screw terminal diagonal-size.