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ZL３０轮式装载机变速器的超越离合器上有一隔离环，如图１所示，其中Φ１４３＋０．２４５＋０．１４５内孔的不圆度要求不大于０．０４mm。如果圆度超差，就会破坏隔离环与内环凸轮之间的配合性质，间隙大小分布不均，并造成该内孔的局部磨损，隔离环容易断裂，超越离合器将
ZL30 wheel loader transmission overrunning clutch has an isolation ring, shown in Figure 1, wherein Φ143 +0.245 +0. 145 holes in the roundness requirements of not more than 0.04mm. If the roundness is out of tolerance, the cooperation between the isolating ring and the inner ring cam will be damaged, the gap size is unevenly distributed, and the inner hole is locally worn. The isolating ring is easily broken. The overrunning clutch