永平铜矿目前有１１台ＷＫ－４型挖掘机采用闸瓦式极限力矩 离合器控制推压机构，该设备为７０年代产品，设计上有许多缺陷，实际使用也存在不少问题（如离合器打滑、固定销常断与离合器径向跳动量大等），维修费用高。通过多年实践，总结并结合钻机离合器的结构特点，将它改为 At present, there are 11 WK-4 excavators in Yongping Copper Mine, which use brake shoe limit torque clutch to control the pressing mechanism. The equipment is a product of the 1970s and has many defects in design. There are also many problems in actual use (such as clutch slip , The normal sales of the clutch and clutch radial runout, etc.), high maintenance costs. After many years of practice, summarize and combine the structural characteristics of the rig clutch, change it to