三坐标测量机Z轴安全装置、是三坐标测量机设计中一个重要问题。往往由于三坐标测量机缺乏安全装置,Z轴脱落后砸坏Z轴下端固定的电子测头(或被测零件或工作台),造成重大损失。仅电子测头一项就价值万元以上,有的更贵。经过一年多的努力,我们研制成功了Z轴安全装置。在SZC～ⅡJ型三坐标测量机上作现场观察和实验,其性能良好,既保证了测量机的精度,又保 Coordinate Measuring Machine Z-axis safety device, CMM design is an important issue. Often due to the lack of safety devices CMM, Z-axis drop after smashing the bottom of the Z fixed electronic probe (or the measured parts or table), resulting in heavy losses. Only an electronic probe on the value of more than 10,000 yuan, and some more expensive. After more than a year of hard work, we have successfully developed a Z-axis safety device. In the SZC ~ Ⅱ J-coordinate measuring machine for field observation and experiments, its good performance, both to ensure the accuracy of the measuring machine, but also to protect