超负荷限制器的主要使用目的,是为了防止因起重物重量估计不对或违反规程超负荷使用时,可能发生的铜绳折断、机械损坏的事故。在苏联早已采用了这种装置。这种限制器是用夹铁纱的帆布垫片和4个螺钉,直接固定在调节滑轮下的超重绳索支线上,在限制器下部绳索通过滑轮。超负荷限制器的主要零件,是限重杆(图1)。限重杆是藉弹簧5使滑轮9压挤起重绳索,而使绳索呈弯曲状态。 The main purpose of overload limiter is to prevent accidental breakage of copper wire and mechanical damage which may occur when the weight of the lifting weight is not estimated or the code is overloaded. This device has long been used in the Soviet Union. This limiter is secured by a canteen of iron with a canvas gasket and four screws that are fixed directly to the overweight rope spur under the adjustment pulley and through which the rope passes under the limiter. The main part of the overload limiter is the deadweight bar (Figure 1). The limit bar is by the spring 5 so that the pulley 9 crush the rope, leaving the rope was bent.