我厂在维修 Z 3025型摇臂钻床中,发现主轴进给超过规定行程后卡死,而不能上下移动。原因是由于主轴进给的运动全部由齿轮、蜗杆与蜗轮的硬联接来传递,因此,当主轴卡死时,各部位在反作用力支配下便无法动作(转动及移动)。通过对传动系统图(见附图)进行受力分析后,还发现齿轮所承 I plant maintenance Z 3025-type radial drilling machines and found that the spindle feed more than a predetermined stroke stuck, but can not move up and down. The reason is that the movement of the spindle is entirely transmitted by the hard coupling of the gear, the worm and the worm gear. Therefore, when the spindle is stuck, the parts can not move (rotate and move) under the reaction force. Through the transmission system diagram (see photo) after force analysis, but also found that the gear