Pneumatic zero point structure used in precision machining industry

The utility model discloses a pneumatic zero-point structure used in the precision machining industry, which comprises a zero-point chuck, large teeth and a zero-point chuck dust cover. A dustproof sliding block in the chuck dustproof cover is matched with large teeth on the zero-point chuck to cover a zero-point chuck sliding rail, a second sliding block covers a chip removal hole of the zero-point chuck, and a dustproof cover shell covers the zero-point chuck, so that dust prevention of the zero-point chuck is achieved; the cleaning workload of the zero-point chuck is reduced through scrap prevention, and meanwhile the service life of the zero-point chuck is prolonged. 本实用新型公开了一种在精密机械加工行业使用的气动零点结构，包括零点卡盘、大齿牙和零点卡盘防尘罩，通过优化设置了卡盘防尘罩，通过卡盘防尘罩中的防尘滑块与零点卡盘上的大齿牙相互配合对零点卡盘滑轨进行覆盖、第二滑动块对零点卡盘的排屑孔覆盖以及防尘罩外壳对零点卡盘的覆盖起到对零点卡盘对防尘、防屑减轻了零点卡盘的清理工作量同时延长了零点卡盘的使用寿命。