本文介绍了动臂变幅起重机用秤式力矩限制器的构造和设计原理。该力矩限制器限据动臂式起重机在不同幅度时因额定起重量发生变化而起重钢绳拉力不同,通过力矩限制器本身的变臂机构,起重钢绳至动臂支点的距离产生相应变化,使作用在测矩摇杆上的扭力矩为一恒定值,从而达到限制起重力矩的目的。 This paper describes the construction and design principles of a scale-type moment limiter for a luffing crane. The moment limiter limit is different for the boom crane due to the change of the rated lifting weight at different amplitudes and the tension of the lifting steel rope is different. Through the variable arm mechanism of the moment limiter itself, the distance from the lifting rope to the fulcrum fulcrum produces a corresponding Change, so that the torque on the rocker rocker is a constant value, so as to achieve the purpose of limiting the lifting torque.