Labor-saving wrench for construction site

Abstract

The invention discloses a labor-saving wrench for a construction site. The labor-saving wrench comprises a wrench body, a positioning device and an extension device, wherein the wrench body is connected with the extension device by virtue of the positioning device, the positioning device comprises a first connecting rod, one end of the first connecting rod is fixedly connected with the wrench body, the other end of the first connecting rod is fixedly connected with a positioning disc, a positioning groove is formed in the outer side of the positioning disc, a positioning rod groove is formed in a second connecting rod, a reset spring is arranged on one end, which is far from of a rotating shaft, of the positioning rod groove, and the outer side of the reset spring is fixedly connected with a positioning rod; the extension device comprises an extension sleeve, an extension rod sleeves the interior of the extension sleeve, a V-shaped groove is formed in an opening of the extension sleeve, and a locking ring is in threaded connection to the outer side of the extension sleeve. The labor-saving wrench has the advantages of simple structure, labor saving and wide application range and has popularization and application values, and the self length and the screwing angle can be adjusted.

Description

technical field [0001] The invention relates to the field of hardware equipment, in particular to a labor-saving wrench for construction sites. Background technique [0002] A wrench is a hand tool that uses the principle of leverage to turn bolts, screws, nuts, and other openings or sockets that are threaded to hold bolts or nuts. The wrench is usually formed with a clamping handle at one or both ends of the handle to apply an external force to the handle to twist the bolt or nut to hold the opening or sleeve of the bolt or nut. When in use, an external force is applied to the shank in the direction of thread rotation, so that the bolt or nut can be twisted. [0003] The existing wrench cannot adjust its own length, and cannot adapt to a variety of use environments on the construction site and cannot achieve labor-saving effects. Moreover, the existing wrench cannot adjust the angle of the screw. In the complex environment of the construction site However, when using trad...

AI Technical Summary

Problems solved by technology

[0003] The existing wrench cannot adjust its own length, and cannot adapt to a variety of use environments in the construction site, and cannot achieve labor-saving effects, and the existing wrench cannot adjust the angle of the screw. In the complex environment of the construction site However, when using traditional wrenches, there are certain limitations

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