Flange type torque sensor

Abstract

The invention discloses a flange type torque sensor, which comprises a flange shaft, left and right flange plates arranged at both ends of the flange shaft, the left flange plate is connected with the power input end, the right flange plate is connected with the load detection end, and the left and right flange plates are connected with the load detection end. The flange has an outer ring connected to the power input end or load detection end, and an inner ring connected to the flange shaft. The flange shaft is provided with a shaft hole, and the inner wall of the shaft hole is provided with an elastic body and a strain gauge. The outer ring It is integrally arranged with the inner ring, and the end surface of the left flange and/or the right flange is provided with an isolation part for isolating the outer ring and the inner ring. In this way, when the left and right flanges are respectively connected between the motor and the load to be detected, after the isolation part is set between the outer ring and the inner ring, the bolt link position on the flange is isolated from the position directly connected to the flange shaft in the middle, Avoid the above-mentioned static stress from being transmitted to the strain gauge, so as to minimize its deformation under the influence of non-detection stress, that is, minimize zero drift.

Description

technical field [0001] The invention relates to the field of measuring devices, in particular to a flange type torque sensor. Background technique [0002] The torque sensor is an instrument for measuring the torque signal of the equipment, which is divided into two categories: dynamic and static. Among them, the dynamic torque sensor can also be called torque sensor, torque speed sensor, non-contact torque sensor, rotary torque sensor, etc. Torque sensors are used to detect the perception of torsional torque on various rotating or non-rotating mechanical parts, and convert the physical changes of torque into precise electrical signals. [0003] In terms of testing principle, torque sensors can be divided into strain type, magnetoelastic type, magnetoelectric type and other types, etc. The torque measurement of strain gauge sensor adopts strain electrical measurement technology. The strain type torque sensor is to paste the resistance strain gauge on the specified position ...

AI Technical Summary

Problems solved by technology

[0004] At present, the Chinese patent with the publication number CN104792445A discloses a wireless linkage torque sensor. The torque sensor includes: a main part, which is the main part of the torque sensor; the left flange is connected to the left torsion plate through eight bolts, and the left There are four countersunk threaded through holes on the small end of the flange, which are used to connect and fix the tested part; the right flange is connected to the right torsion plate through eight bolts, and there are four countersunk holes on the small end of the right flange. The threaded through hole is used to connect and fix the tested part; the strain gauge is pasted in the middle of the elastic body. The strain gauge is a component that senses the torque signal and can convert the mechanical strain of the elastic body into a change in resistance. Due to the left flange and the right Both flanges can be connected to the tested part, one of the flanges is used as the tested part, and the other flange needs to be installed with a driving part, such as a motor, to drive the entire flange to rotate. The flange torque sensor needs It is installed between the motor and the tested part through the flange, and when the flange is installed, one end of the left and right flanges is connected to the tested part and the other end is connected to the driving part. The angle error after the left and right flanges are fixed will make the flange shaft in the There is a small deformation before the force is applied, and the elastic body installed in the shaft hole and the strain gauge attached to the elastic body will also be slightly deformed under the influence of it, forming a static stress that counteracts the deformation. Before the test, this stress will make the test starting position of the strain gauge higher than the zero point, that is, increase its zero point drift and affect the test result

Images