Automatic calibrator for torque wrench

Abstract

The invention discloses an automatic calibrator for a torque wrench, and the calibrator comprises a plurality of sensor units with different ranges, a workbench, a sensor unit positioning seat, a sensor unit switching mechanism, a lifting mechanism, a connecting shaft, a connecting shaft positioning mechanism, a drive mechanism, a drive plate, a wrench support mechanism, a camera, a sound sensor,a lower computer, and an upper computer with automatic calibration software. The sensor unit switching mechanism consists of a rotating disc and a rotating mechanism. The plurality of sensor units with different ranges are placed on the rotating disc, and the rotating mechanism enables the sensor unit with the required range to rotate to a place above the lifting mechanism, and then the lifting mechanism drives the sensor unit to rise or fall and cooperates with or separate from the sensor unit positioning seat, thereby achieving the automatic switching of the torque sensor. The calibrator isaccurate and reliable in calibration result, can automatically switch the torque sensor, has the functions of automatic loading, automatic torque releasing and automatic collection of calibration data, and reduces the work intensity of a calibration worker.

Description

technical field [0001] The invention relates to a calibrator of a mechanical tool, in particular to an automatic calibrator of a torque wrench. Background technique [0002] The torque wrench is a wrench used to tighten the bolts according to the preset torque value. In order to ensure the accuracy and reliability of the indication value, the torque wrench needs to be calibrated regularly according to the JJG707-2014 "Torque Wrench" verification regulations. [0003] Torque wrench calibration generally uses a torque wrench calibrator, which needs to manually collect the torque wrench indication value, and when calibrating a torque wrench with a wide range of indication values, it is also necessary to manually replace the torque sensor, which has a cumbersome operation process and is easy to manually replace the torque sensor Drawbacks that introduce calibration errors. [0004] Patent CN201120075356.3 discloses a torque transmission device. The transmission device installs ...

AI Technical Summary

Problems solved by technology

Although the torque transmission mechanism of this structure can cover the full-scale detection in one clamping, and the torque sensors of different ranges can be automatically switched, there are still the following defects: First, the versatility is poor, only the torque sensor with a ring shape can be installed in the trapezoidal On the shaft, the conventional torque sensor widely used in the market cannot be used; second, it is inconvenient to send to school and maintain, because the torque sensors with different ranges are installed on the trapezoidal shaft, so the replacement of the middle torque sensor requires disassembly and assembly of multiple torque sensors; During the torque loading process, when the slipping gear meshes with the fixed gear to transmit torque, a large lateral force will be generated, and the lateral force will affect the measurement of the torque sensor, thereby bringing errors to the calibration results; the fourth is the torque The indication value of the wrench needs to be collected manually, which is cumbersome to operate

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