Torque wrench

Abstract

The invention provides a torque wrench which comprises a wrench rod and a wrench head which are connected with each other. A sleeve and a mark coating and printing device are assembled on the wrench head; the mark coating and printing device is assembled in a mounting hole of the wrench head; the bottom of the mark coating and printing device extends into a through hollow cavity of the sleeve; and the mark coating and printing device can reciprocate along the axis of the sleeve to print marks. According to the torque wrench provided by the invention, the mark coating and printing device and the torque wrench are integrated into an integrated structure, so that mark coating and printing are automatically carried out by adopting the same equipment after preset torque is applied to a bolt, time and labor are saved, and the working efficiency is high.

Description

technical field [0001] The invention relates to the technical field of mechanical equipment, in particular to a torque wrench capable of imprint printing. Background technique [0002] In aerospace, rail transit and other fields, in order to ensure that the bolts do not loosen, it is usually necessary to apply a precise torque value with a torque wrench after the bolts are pre-tightened. However, only by observing the fastening state of the bolt surface, it is impossible to judge whether the torque is applied after the bolt is pre-tightened, which brings difficulties to the quality inspection of the bolt fastening. During the operation of the equipment, the bolts loosen. [0003] In order to solve the above-mentioned problems, the existing conventional practice is to mark the bolts that are pre-tightened and torsion applied, so as to ensure that the bolts are loosened due to missing torsion applied to the bolts. However, this method is cumbersome to operate, and additional...

AI Technical Summary

Problems solved by technology

However, only by observing the fastening state of the bolt surface, it is impossible to judge whether the torque is applied after the bolt is pre-tightened, which brings difficulties to the quality inspection of the bolt fastening. During the operation and use of equipment, the problem of bolt loosening

[0003] In order to solve the above problems, the existing conventional practice is to mark the bolts that are pre-tightened and torsion applied, so as to ensure that there is a problem of bolt loosening caused by missing torsion applied to the bolts.

However, this method is cumbersome to operate, and additional marking equipment needs to be carried, which is time-consuming and labor-intensive, and the work efficiency is low

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