电动葫芦上升的限位,一般多采用舌片式和绳轮定位等方式。由于起吊重物的过程中,有时限位定位失灵,酿成事故,轻则顶坏限位开关或舌片等机械部分,重则顶坏绳轮护罩、扭断钢丝绳等。笔者在工作中常见到一些企业的电动葫芦在无限位状态下工作, Electric hoist rise limit, the general use of tongue and sheave positioning and other means. As lifting heavy objects in the process, sometimes limit bit positioning failure, causing accidents, ranging from the top of the limit switch or tongue and other mechanical parts, heavy top rope sheave shield, broken rope and so on. I often see in the work of some enterprises in the unlimited electric hoist state work,