力矩限制器和起重量限制器统称为超载防护装置。在《起重机械监督检验规程》中规定:轮式起重机起质量大于16t、履带起重机起质量大干32t时,应装设力矩限制器,当起重力矩大于相应工况下的额定值或小于额定值的110％时,应立刻切断上升和增幅方向的动力源,但应允许机构做下降和减幅方向的运动。超载防护 Torque limiter and the weight limiter collectively referred to as overload protection device. In “Lifting Machinery Supervision and Inspection Regulations,” provides: wheeled cranes from the quality of more than 16t, crawler crane from the quality of dry 32t, should be installed torque limiter, when the lifting torque is greater than the rated conditions under the corresponding conditions or less than 110% of rating, the power source in the direction of increase and increase should be cut off immediately. However, the mechanism should be allowed to do the movements of descending and decreasing direction. Overload protection