Fixed-torque electric spanner

Abstract

The invention relates to a fixed-torque electric spanner. The fixed-torque electric spanner comprises a shell. A torque output structure with the rotating axis stretching in the front-and-back direction is arranged at the front end of the shell, a battery is mounted at the rear end of the shell, a counter-acting force measuring arm is fixedly arranged on the shell, a force detection structure forbeing in force transmission cooperation with a corresponding fixing part to detect acting force borne by the counter-reacting force measuring arm is arranged on the counter-acting force measuring arm,and the force detection structure comprises a force sensor. Torque is output to a bolt or a nut through the torque output structure, when tightened to a certain degree, the bolt or the nut cannot continue to be tightened, according to the acting force and the counter-acting force, the shell can bear counter-acting force at the moment, the force detection structure of the counter-acting force measuring arm is blocked on one fixing part, the counter-acting force borne by the shell at the moment is detected by the force sensor, and the output torque at the position of the torque output structurecan be precisely converted according to the counter-acting force.

Description

technical field [0001] The invention relates to a constant torque electric wrench in the field of electric tools. Background technique [0002] As a common electric tool, the electric wrench is frequently used. One of the electric wrenches that can achieve a constant torque output is also called a constant torque electric wrench. The existing constant torque electric wrench includes a housing on which a motor is a power source. The front end of the housing is provided with a sleeve rod connected to the motor through a transmission mechanism. The sleeve rod is used as a torque output structure for outputting torque outward. In order to realize the output of constant torque, the electric wrench has a torque detection part, which detects the output torque of the torque output structure, so as to stop the power output when the specified torque is reached. The torque detection part of the existing constant torque electric wrench is basically through It is realized by detecting t...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a constant torque electric wrench to solve the problem of poor detection accuracy of the output torque of the torque output structure in the prior art

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