Preset torque wrench structure and working principle

The preset torque wrench is one of the most common types of torque tools among many hardware tools. The most important function of the preset torque wrench is to accurately assemble and control the thread tightening torque. Then the following styling preset torque wrench Xiaobian brings you to understand the structure and working principle of the preset torque wrench manufactured by Shanghai Chucheng Electronic Technology Co., Ltd.

First, the structure of the preset torque wrench The preset torque wrench is also called torque wrench and torque wrench. It is based on the bending principle of the beam, the bending principle of the torsion bar and the compression principle of the coil spring. It can measure the torque acting on the nut. The preset torque wrench has a long elastic rod with a handle at one end. The other end is equipped with a square or hexagonal head, and a replaceable sleeve is set on the square head or on the hexagonal head, which is stuck with steel balls. There is also a long hand on the top, the scale plate is fixed on the handle, the scale value is 1N (or kg/m). Before use, first adjust the indicator installed on the wrench to the required torque, and then pull the wrench. When the predetermined torque is reached, the pointer on the indicator will turn to the pin side, and finally the pointer collides with the pin. , Inform the operator via speaker signal or sensor signal.

Second, the pre-installed torque wrench working principle: 1, preset torque wrench is issued after the "Kata" sound is prompted to achieve your required torque value; 2, preset torque wrench issued by the "Kata" is by itself Internal torque release structure, its structure is divided into pressure springs, torque release joints, torque jack three structures. 3, first set the desired torque value on the preset torque wrench (by the spring sleeve on the top rod Apply pressure to the torque release joint, lock the preset torque wrench and begin tightening the bolt. When the bolt reaches the torque value (when the torque is greater than the spring pressure), there will be an instantaneous disconnection effect. At the moment when a disjointed effect occurs, a joint strike is made and the “Kata” sound from the metal casing of the wrench is emitted. This confirms the reminder of reaching the torque value (actually the same as the principle of the steel pipe when the arm joints are bent in an iron pipe and are bent at right angles in an instant.

The above content is the structure and working principle of the preset torque wrench. In the process of using the preset torque wrench, we first set a required upper limit of the torque value. When the applied torque reaches the set value, the preset torque wrench will issue The "Kata" sound or the preset torque wrench joint is bent at a slight angle, which means that it has already been tightened and no further force is applied.