扭矩扳手工作原理：是依据梁的弯曲原理、扭杆的弯曲原理和螺旋弹簧的压缩原理而设计的，能测量出作用在螺母上的力矩大小。扭矩扳手又叫力矩扳手、扭力扳手、扭矩可调扳手，是扳手的一种，一般分为三类：手动力矩扳手、气动扭力扳手和电动力矩扳手。扭矩扳手有一根长的弹性杆，其一端装着手柄，另一端装有方头或六角头，在方头或六角头上套装一个可换的套筒，用钢珠卡住。在顶端上还装有一个长指针。刻度板固定在柄座上，每格刻度值为1N。
Working principle of torque wrench: it is designed according to the bending principle of beam, the bending principle of torsion bar and the compression principle of coil spring, and can measure the torque acting on the nut. Torque wrench is also called torque wrench, torque wrench and torque adjustable wrench. It is a kind of wrench, which is generally divided into three categories: manual torque wrench, pneumatic torque wrench and electric torque wrench. The torque wrench has a long elastic rod, one end of which is equipped with a handle, and the other end is equipped with a square head or hexagonal head. A replaceable sleeve is sleeved on the square head or hexagonal head, which is clamped with a steel ball. There is also a long pointer on the top. The scale plate is fixed on the handle base, and the scale value of each grid is 1n.
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