CN2290449Y

CN2290449Y - Anti-skid open spanner

Info

Publication number: CN2290449Y
Application number: CN 97218937
Authority: CN
Inventors: 谢智庆
Original assignee: Individual
Current assignee: Individual
Priority date: 1997-06-09
Filing date: 1997-06-09
Publication date: 1998-09-09
Anticipated expiration: 2007-06-09

Abstract

The utility model relates to an anti-skid open spanner. Shallow platforms are arranged on both lateral sides of a spanner opening symmetrically, and the shallow platforms are divided into two narrow platform convex teeth and a broad platform convex tooth by two rectangular slots. The utility model can wrench worn hexagonal bolt heads, and the wrenching range comprises worn bolt heads larger than an inscribed circle. The utility model solves troubles brought to the work because of the abrasion of the bolt heads at present and especially solves a difficult problem in the repairing trade.

Description

Anti-skidding open-end wrench

A kind of anti-skidding open-end wrench, it belongs to the hand-held tool field, and it relates to the open-end wrench that can pull the wearing and tearing screw.

Its structure of existing open-end wrench is single head or double end form, they pull a mouthful inner side edge, be linear, after the screw terminal corner angle that screwed or unclamp are worn, promptly produce and skid, can't pull, often make troubles to work.After improving through people, will pull mouthful two sides and change into curved or geometry such as sharp-tooth shaped.But they only can pull the lighter screw terminal of wearing and tearing, and its profile of tooth is easy to wear, and to the more serious bolt head of wearing and tearing, and it is then powerless that particularly wearing and tearing approach the bolt of inscribed circle state, can only take the pincers worker method to remedy, cause very big inconvenience in the work.

The purpose of this utility model is to propose a kind of anti-skidding open-end wrench, all makes shallow boss form on the dual-side of pulling mouth, makes rectangular teeth on the boss and pulls the bolt head that is worn.Make it have the deficiency that the function that all can pull when wearing up to inscribed circle position degree under the normal condition overcomes prior art.

The utility model is realized in the following way, on the dual-side of wrench opening, respectively be shaped on a length less than the shallow platform of being pulled the hex bolts head in the position of middle part symmetry, by two rectangular channels, it is divided into two narrow rectangular teeths and a wide rectangular teeth, and middle narrow rectangular teeth is just near the position of center line place that is pulled the hex bolts head.

This utility model has rotatable and unclamps the hex bolts head and has been worn degree greater than any heavy wear bolt head beyond the inscribed circle.Thereby it has solved because bolt head weares and teares and to the trouble that work brings, particularly solved a great problem in the repairing trades.

Description of drawings:

Accompanying drawing 1, the utility model outline drawing

Accompanying drawing 2, the utility model are pulled wearing and tearing screw terminal schematic diagram

Accompanying drawing 3, another working face of the utility model are shallow platform form figure

Accompanying drawing 4 is pulled wearing and tearing bolt head function partial schematic diagram

In conjunction with the accompanying drawings the anti-skidding open-end wrench of the utility model is described further below by embodiment.

Embodiment 1, this open-end wrench is made form as shown in Figure 1, at open-end wrench 1, pull middle part in correspondence with each other on mouthful dual-side 10, make the shallow platform 13 of a projection respectively, its length is less than the length of side of the hex bolts head of being pulled, bottom face 11 by opening on shallow platform makes progress, by two rectangular channels 12 shallow platform is constituted two identical narrow rectangular teeths 101 successively respectively respectively, 103 and wide rectangular teeths 102 near the narrow rectangular teeth width of twice, and middle narrow rectangular teeth 103 approaches to be pulled on the center line of hex bolts head just, and this spanner adopts copper beryllium alloy steel to make.It can be pulled as shown in Figure 4 by normal bolt head angular radius L is worn up to bolt head greater than the whole wearing and tearing in the inscribed circle radius R scope.

Embodiment 2, and the side on the open-end wrench 1 opening dual-side 10 is made the 1 identical form with embodiment, and only are shaped on the form of shallow flat attitude 13 no rectangular channels on another side 10, as shown in Figure 3.

Claims

1, a kind of anti-skidding open-end wrench, it is characterized in that: on the dual-side (10) of spanner (1) opening, the middle part respectively is shaped on a length symmetrically less than by the shallow platform (13) of wrenching bolt head, by two rectangular channels (12), it is divided into two narrow rectangular teeths (101), (103) and a wide rectangular teeth (102), and middle narrow rectangular teeth (103) is just built in being pulled hex bolts head position of center line place near quilt.

2, a kind of by the described anti-skidding open-end wrench of claim 1, it is characterized in that: the form that only is shaped on the no rectangular channel of shallow platform (13) (12) on the side (10) of open-end wrench (1) opening.