CN2077990U

CN2077990U - Torque transducer

Info

Publication number: CN2077990U
Application number: CN 89213356
Authority: CN
Inventors: 周若愚
Original assignee: Chengdu Seamless Steel Tupe Plant
Current assignee: Chengdu Seamless Steel Tupe Plant
Priority date: 1989-12-06
Filing date: 1989-12-06
Publication date: 1991-05-29

Abstract

The utility model relates to a conductive rubber torque sensor which adopts conductive rubber as the torque sensing element. The conductive rubber is arranged in an elastic rubber protecting case connected by a side electrode and a leading wire. The torque sensor can be directly arranged among rubber blocks and among the transfer torque working surface of two semi-shaft couplings of a metal spring elastic shaft coupling, and then the torque sensor can be educed by a slide ring and an electric brush. The torque sensor can compose a bridge together with an additional resistance and is educed by a rotary transformer to measure the torque of a rotating shaft according to the resistance variation of the conductive rubber. The torque sensor can be directly arranged on the shaft coupling, and a special elastic shaft is not needed. The torque sensor has simple structure, convenient processing and installation, and big strain capacity of the sensing element in measuring processes.

Description

Torque transducer

The utility model relates to a kind of torque sensor, particularly a kind of conductive rubber torque sensor that is loaded on the shaft coupling.

Existing all kinds of rotating machinery torque sensor has resistance-strain chip, magnetoelasticity formula, photo-electric, phase-difference type etc. by the principle difference; They exist palpus dedicated elas-tic axle, and install and want two shaft couplings, complex structure, elastic shaft torsional strain amount is little, influences shortcomings such as sensitivity.

The utility model purpose is to design a kind of torque sensor that can overcome above-mentioned shortcoming.

The utility model torque sensor is characterised in that and adopts conductive rubber as the torque sensing element that it is formed by conductive rubber with by the elastic caoutchouc protection box of two sides electrode and lead-in wire as Fig. 1.Sensor directly is loaded on existing block rubber or the metal spring spring coupling, and two half a couplers transmit between the moment of torsion workplace, with flexible member same position place.In transmitting the moment of torsion process, senser element will produce and couplings elastic elements same strain amount.Sensor lead can be loaded on the mechanical axis slip ring and link, draw through brush; Also can form bridge circuit, draw through being loaded on a last rotary transformer with additional resistance.

The utlity model has big, highly sensitive, the anti-collision of sensing element dependent variable; Need not the dedicated elas-tic axle, can directly be loaded on the shaft coupling; Simple in structure, lower-price characteristic.

The utility model has following accompanying drawing:

Fig. 1 conductive rubber torque sensor figure

Fig. 2 conductive rubber torque sensor circuit diagram

Fig. 3 conductive rubber torque sensor installation diagram on the block rubber spring coupling

The utility model is described further in conjunction with the accompanying drawings.

The fan-shaped contour body of 1--conductive rubber among Fig. 1, its arc radius is identical with protection box 4, and fan-shaped arc face width degree, height and thickness are respectively 1/3rd protection box corresponding sizes, but are not less than 10 millimeters, and height and thickness all should be greater than width in addition.Electrode 2 is the zinc-plated copper plate of 1-2 millimeters thick, near the fan-shaped side of conductive rubber body.0.5 square millimeter of copper core insulation of lead-in wire 3 usefulness flexible cord.Protection box 4 usefulness elastic block rubbers make; it is a fan-shaped cambered surface box of cutting open along the longitudinal axis symmetry; physical dimension is identical with block rubber elasticity shaft coupling block rubber in the heart, and inner cavity size is identical with conductive rubber body 1 and electrode 2 assembly physical dimension, but should make 1 and 2 in inner chamber for being slidingly matched.

Each conductive rubber sensor connects back all-in resistance Rm and forms bridge circuit by the inverse ratio variation with three booster resistor R1, R2, R3 with the size that is under pressure among Fig. 2; Its power supply is introduced, signal is exported respectively through a rotary transformer T1 and T2.

Conductive rubber torque sensor 1 is loaded between two half a couplers transmission moment of torsion workplace, with flexible member 2 same position places among Fig. 3; When mounted, only needing to go out flexible member with the corresponding size replacing sensor gets final product.Sensor should be even number, is 4 among the figure, be symmetrically distributed on the shaft coupling disk, but the sensor serial or parallel connection, again be loaded on the shaft coupling additional resistance 7 and form bridge circuits, draw through being loaded on the axle 4 two rotary transformers 8,5 is cover plate, the 6th, set bolt.

Claims

The utility model torque sensor is by conductive rubber stress sensing element and connection electrode, lead-in wire; elastic caoutchouc protection box is formed; it is characterized in that the stress sensing element adopts conductive rubber to be processed into and the identical fan-shaped contour body of flexible member shape in the spring coupling, and and the combination of resilient protection box be loaded on two half a couplers and transmit between the moment of torsion workplace.