对卷边防尘盖轴承的结构和压盖原理进行分析，并设计缓冲式冲头，解决了轴承活盖问题。

By analyzing the structure of cramped shield bearings and the principle of shield pressure, a buffered punch is designed, so as to solve the issue of shields as detachable ones in bearings.

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该电动机包含机座、机座换向 器端的与机座固定的内端盖、与内端盖固定的轴承盖和位于轴承盖和轴承之间 的轴头压板；

The motor contains a seat, an inner end cap on the commutator connecting to the seat, a bearing cap connected with the inner end cap, an end plate between the bearing cap and the bearing.

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