TWI413576B - - Google Patents

Abstract

The present invention relates to an electronic torque tool with automatic compensation device of force multiplier and its operation method comprising an electronic torque tool capable of replacing force multiplier, a plurality of force multipliers having different multiple ratios, a torque multiple ratio setting module, a torque multiple ratio compensation conversion module and a torque operating range conversion module, wherein one of the plurality of force multipliers having different multiple ratios is selected to install in the electronic torque tool. The torque magnification setting module is used to set the multiple ratio based upon the multiple ratio of the force multipliers, and new torque operational range of the electronic torque tool is converted and changed by the torque operation range conversion module based upon the set multiple ratio, and the displayed working torque on the electronic torque tool is equivalent to the actual output torque outputted by the force multiplier through the torque multiple ratio compensation conversion module based upon the set multiple ratio. Accordingly, the user can directly set the target torque of the force multiplier output shaft from the electronic torque tool, and while operating the electronic torque tool with the automatic compensation device of the force multiplier, the instant torque displayed value of the electronic torque tool equals the actual output torque from the force multiplier output shaft. There is no need to perform man-made conversion to increase the reliability and convenience in usage.