CN2917958Y - Multi-specification wrench - Google Patents

Abstract

A multi-specification wrench. The utility model relates to a manual hardware and tools especially relates to an open-end wrench technical field. The wrench comprises a wrench body and a wrench head, wherein two working faces of an opening of the wrench head are respectively provided with a wrench working face consisting of a plurality of curved surfaces or one of the working faces is provided with a wrench working face consisting of a plurality of curved surfaces, and the other working face is a straight face. The utility model changes the working mode that the sharp corners of the original bolt are all positioned in two corresponding straight edges, but form three-line contact with the bolt, so that the sharp corners of the bolt are not contacted with the working surface of the plate opening, thereby avoiding the abrasion of the sharp corners of the bolt; the working surface formed by a plurality of curved surfaces increases the specification of the wrench, so that one plate opening can operate bolts with two specifications; the curved surface corresponding to the working surface is combined with the curved surface, so that the wrench can return to the original position without departing from the bolt when in work. The utility model discloses convenient to use, work efficiency is high, does not harm the bolt.

Description

A kind of many specifications spanner

Technical field

The utility model relates to manual hardware ﹠ tools, relates in particular to a kind of open-end wrench technical field.

Background technology

One of present employed open-end wrench is pulled mouth only can corresponding specification, in the occasion of using the plurality of specifications bolt, then just must carry the spanner of plurality of specifications, simultaneously, because spanner is pulled oral-lateral face and bolt point angular contact when work, make bolt be easy to damage, make the bolt corner wear, the bolt after the wearing and tearing can not normally use.

Technical scheme

At above defective, it is a kind of easy to use that the utility model provides, and high efficiency is not damaged many specifications spanner of bolt.

The utility model comprises pulls body, driving end, is respectively equipped with the spanner working face of being made up of a plurality of curved surfaces on two working faces of driving end opening; Or one of them working face is provided with the spanner working face that a plurality of curved surfaces are formed, and another working face is for facing directly.

The wedge angle that the utility model has changed original bolt all is in the interior working method of two corresponding straight flanges, but forms three-way the contact with bolt, makes the wedge angle of bolt not contact with plate mouth working face, has avoided the bolt point corner wear; The working face that a plurality of curved surfaces form has increased the specification of spanner, makes a plate mouth can operate the bolt of two specifications; The curved surface of corresponding working face in conjunction with above-mentioned curved surface, makes spanner when work, can be under the state that does not break away from bolt return.The utility model is easy to use, and high efficiency is not damaged bolt.

Description of drawings

Fig. 1 is a structural representation of the present utility model

1 is the plate mouth among the figure, the 2nd, and plate mouth, the 3rd, curved surface, the 4th, curved surface;

Fig. 2 is the utility model user mode figure

5 is contact points among the figure, the 6th, and contact point, the 7th, contact point.

Fig. 3 is the user mode figure of prior art

Fig. 4 is the state diagram of bolt wearing and tearing after the use of prior art

Fig. 5 is another embodiment schematic diagram of the present utility model

8 is straight flanges among the figure.

The specific embodiment

The utility model is established many curved surfaces on two working faces 1,2, the curved surface 3 oral area openings that are provided with on the working face of a plate mouth 2 therein are big, and bottom opening is little, forms step-likely, constitutes the embedded location of corresponding two kinds of specification bolts with another working face.Make a double (end) wrench can realize the job requirement of four specifications.

On working face 1, corresponding above-mentioned curved surface 3 is established curved surface 4, and this curved surface 4 is more shallow, is the convenient wrench return.

Operation principle of the present utility model is: wrench opening is designed to the open surfaces be made up of some curved surfaces, the bolt of the corresponding different size of energy, during each working surface work, contact with bolt with contact point 7 by contact point 5, contact point 6 and to carry out work, wherein contact point 5, contact point 6 and contact point 7 have left the cusp at bolt angle, then easy damaged bolt angle not; The bolt that fillet has been damaged at the bolt angle also can use simultaneously.

In addition, this structure also makes the spanner can be to the active force reversed turning under the prerequisite of not leaving bolt, and bolt is motionless, and this kind structure can not worked under spanner does not break away from the situation of bolt like this, has the function of ratchet spanner, has improved operating efficiency.

Working face 1 can also be set to straight flange 8, can adapt to two kinds of different size bolts.

Claims (1)

1, a kind of many specifications spanner comprises and pulls body, driving end, it is characterized in that, is respectively equipped with the spanner working face of being made up of a plurality of curved surfaces on two working faces of driving end opening; Or one of them working face is provided with the spanner working face that a plurality of curved surfaces are formed, and another working face is for facing directly.

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