Torque sensor

Abstract

The invention, which relates to the technical field of the detection device, provides a torque sensor comprising an elastomer and a strain detection assembly. The elastomer comprises an outer ring, an inner ring, a strain beam and a bearing beam; the inner ring and the outer ring are both of an annular structure and are coaxially arranged, the outer ring is used for being connected with a base, and the inner ring is used for being connected with a driving piece for inputting torque; the strain beam and the bearing beam are connected with the inner ring and the outer ring respectively, the strain detection assembly is arranged on the strain beam, and the cross section area of the strain beam is smaller than that of the bearing beam. The outer ring of the elastomer is fixed on the base, the inner ring enables the bearing beam and the strain beam to generate strain through loading of the driving piece, the cross sectional area of the strain beam is smaller than that of the bearing beam, and deformation of the strain beam is larger than that of the bearing beam, so that when torque detection is achieved through the strain detection assembly arranged on the strain beam, detection precision loss caused by deformation errors can be avoided, the detection precision of the torque sensor is improved, and the high-precision detection requirement is met.

Description

technical field [0001] The invention relates to the technical field of detection devices, in particular to a torque sensor. Background technique [0002] Torque sensors, also known as torque sensors, are used to measure one-dimensional torque physical quantities. Resistance strain sensor is the most widely used torque sensor at home and abroad. It adopts the traditional method of pasting strain gauges on the surface of elastic beams. When physical quantities such as torque act on the elastic beams, it will cause changes in the stress and strain of the components, which in turn will cause changes in the resistance of the strain gauges. The changes in resistance will be processed by the circuit. Signal output, this kind of sensor is widely used in the measurement of torque. [0003] However, due to the structure of the elastic beam of the known torque sensor, the detection accuracy of the torque sensor is relatively poor, which cannot meet the use requirements of high-precis...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a torque sensor to alleviate the technical problem that the existing torque sensor has poor detection accuracy due to the structure of the elastic beam and cannot meet the use requirements of high-precision detection

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