Intelligent torque wrench

Abstract

The invention discloses an intelligent torque wrench, and belongs to the technical field of torque wrenches. The intelligent torque wrench comprises a sleeve, a wrench body, a safety pin, a counter-force arm, a reduction gear box, an auxiliary handle, strap hoisting rings, a synchronous ac motor (which has a contracting brake function), a speed measurement module, a fan, a control system shell, ahandle and a plug with an earth leakage protection function. A control panel with a display function is arranged on the shell; a system circuit board is arranged in the shell and comprises a system core panel, a communication module, a power module and detection modules (a current detection module, a voltage detection module and a rotation speed detection module). Compared with a traditional scheme, the intelligent torque wrench has the advantages that a scheme in which three parameters of the current, voltage and rotation speed of the motor are detected is adopted; precision of torque outputting is improved; meanwhile, a PID control scheme is adopted for the whole system; and response speed and stability are improved, so that the performance of the torque wrench is optimized.

Description

technical field [0001] The invention belongs to the technical field of electric torque wrench, in particular to an intelligent torque wrench. Background technique [0002] Torque wrench is an indispensable tool in machinery, chemical industry, bridge, metallurgy, and electric power industries. It tightens various bolts with a certain torque to ensure reliable connection and normal use of mechanical equipment. Controlling the pretightening force usually uses a torque wrench to control the size of the pretightening force. Therefore, in the assembly process of connecting with bolts, it is required that the tightening torque of the bolts must reach a specified value to ensure the reliability of the bolted connection. Therefore, it is required that the torque wrench used can control or display the magnitude of the torque, so that the tightening of the bolts can be accurately controlled. The torque value ensures the long-term and reliable operation of the equipment. [0003] Var...

AI Technical Summary

Problems solved by technology

Mechanical torque wrench has the characteristics of low price, strong and durable, etc., but the torque control accuracy is low, the torque range is limited, and the torque value cannot be accurately controlled and displayed in real time, so the connection reliability of the screwed bolts cannot be guaranteed

However, most electric torque wrenches use a single detection motor current control scheme, and the response speed is slow, there is no communication function, and the requirements of high precision, high efficiency and real-time monitoring cannot be achieved.

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