Manual wrench facilitating unscrewing or screwing of nut in narrow space

Abstract

The invention discloses a manual wrench which is convenient for taking out or tightening nuts in a long and narrow space. The main features are: the right end of the inner hollow formed by the upper shell and the lower shell is welded to each other with a driving sprocket, and the left end of the inner hollow is equipped with a driven sprocket, and the tooth A of the driving sprocket meshes with the right end of the chain. Transmission, the left end of the chain meshes with the tooth B of the driven sprocket; the square column A of the integrated structure at the upper end of the first journal of the driving sprocket is in motion with the square hole A at the left end of the hand crank; the driven sprocket The square column C of the integrated structure at the lower end of the fourth journal is in dynamic fit with the square hole B at the upper end of the sleeve. Just insert the square hole B at the upper end of the sleeve that is compatible with the nut into the square column C at the lower end of the driven sprocket, insert the 12-angle hole sleeve at the lower end of the sleeve on the nut, and rotate the first journal of the driving sprocket The square column A on the upper end can be easily and quickly removed or tightened by the hand crank matched with the hand handle in the narrow and long space, reducing labor intensity and improving work efficiency.

Description

technical field [0001] The invention relates to the technical field of hardware tools, in particular to a manual wrench which is convenient for pulling out or tightening nuts in a long and narrow space. Background technique [0002] When dismantling or installing a machine, it is often encountered that two machines are very close to each other, and the space between the two machines is very narrow, and people cannot directly enter the narrow and long space to remove or tighten the nuts. To remove or tighten the nut in a narrow and long space, you can only stretch the arm holding the wrench into the long and narrow space to pull the wrench with difficulty. Due to the narrow and long space, the wrench cannot hold the nut to rotate 360 ​​degrees, and you can only turn the wrench at a certain angle. Loosen the wrench, then re-lock the wrench at another position of the nut and turn it at a certain angle, and repeat the operation until the nut is loosened or tightened. It is very...

AI Technical Summary

Problems solved by technology

[0002] When dismantling or installing a machine, it is often encountered that two machines are very close to each other, and the space between the two machines is very narrow, and people cannot directly enter the narrow and long space to remove or tighten the nuts. To remove or tighten the nut in a narrow and long space, you can only stretch the arm holding the wrench into the long and narrow space to pull the wrench with difficulty. Due to the na

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