铸件结构应避免急剧变化，尽可能避免尖角，圆角应达到R0.3以上。

Avoid the quick changes of casting structure, use fillet radius on internal Angle when possible, which is no less than R0.3.

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2减速机输入轴处轴肩处未细致考虑过渡圆角的曲率半径和变化曲线使应力集中严重发生疲劳破坏。

2 the curvature radius and the change curve of the transition fillet at the shoulder of the input shaft of the reducer are not carefully considered.

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