Torque wrench with sensor

Abstract

The spanner of a sensor is used to improve the precision and repeatability of the torsion value measuring. The spanner comprises a body, at least a sensor, and at least a positioning device, with the body having at least a positioning section partially proud of the wall of the body, each sensor having two ends and a body between these two ends which has at least one sensing plate to check the deformation status. The sensor is set on the body, each end setting on each positioning section, and each fastening device being used to combine the body and each sensor.

Description

technical field [0001] The invention relates to a wrench, in particular to a torque wrench with a sensor. Background technique [0002] When using a wrench to rotate the bolt, in order to know the torque applied by the rotating bolt, a strain gauge is usually directly pasted on the handle of the wrench, and the deformation of the wrench is used to drive the strain gauge to produce electrical changes. , the torque value can be calculated and displayed by sensing the electrical change. [0003] In the above method of directly pasting the strain gauge on the handle of the wrench, there will be a disadvantage that the strain gauge cannot be disassembled and used according to different application requirements, so as shown in Figure 22 (China Taiwan Patent No. M268138 ), is a torque sensor 201 that can be installed on the wrench 200 in an external manner, and a sensing component 204 that can sense the deflection of the handle 203 is arranged on the neck 202 of the torque sensor ...

AI Technical Summary

Problems solved by technology

[0006] However, since the strain body 218 of the above-mentioned wrench also directly abuts against the side abutment surface 216 or the socket 217 of the main body 211, the problem encountered is as mentioned above. When the wrench is deformed by torsion, the strain body 218 and the The joint surfaces between the main bodies 211 will also slide relative to each other, which will also cause the loss of stable relative positional relationship between the strain sensing unit 219 and the main body 211

In addition, as shown in FIG. 23, due to the straight shape of the strain body 218, when the strain body 218 is in compression, the strain body 218 will produce buckling (buckling), and when the strain body 218 is elongated, it will cause Severe sliding phenomenon occurs between the strain body 218 and the main body 211, all these phenomena will cause the loss of stable bonding relationship between the strain sensing unit 219 and the main body 211, so that the bending deformation and torque value of the wrench cannot be sensed correctly

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