以冲击加速度为主要数据，分析了改变内壳板厚、外壳板厚、肋骨尺寸、肋骨间距等结构参数对冲击响应的影响。

Analysis regarded impact acceleration as key data to change structural parameters, such as thickness of external and internal shells, dimensions of rib, and rib intervals.

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所述动力工具包括内壳（50），该内壳至少部分地容纳在外壳（30）中并且与外壳（30）隔开。

The power tool includes an inner housing (50) at least partially housed within and spaced from an outer housing (30).

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外壳包括第一和第二壳壳底部连接到墙上，涵盖内套完第一和第二次公开墙。

Outer shell includes first and second shell side walls attached to a shell bottom wall and covering first and second open ends of inner sleeve.

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