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图1是美国 THK 公司制造的 BNS 型滚珠丝杠—花键装置的结构示意图,此种传动机构可提供三种运动方式。该装置的传动轴上铣有螺旋槽和花键槽,滚珠花键螺母和滚珠丝杠螺母安装在轴上。传动辅可分别作线性运动、回转运动或螺旋运动。轴的运转方式视其中哪个螺母在回转以及螺母旋转方向而定。例如,当仅是滚珠丝杠螺母回转时,在静止的花键螺母中的滚珠导向下,轴作线性移动(图2a),线
Figure 1 is the United States THK company made BNS ball screw - spline device structure diagram, the transmission can provide three kinds of movement. The drive shaft of the device is milled spiral groove and spline groove, ball spline nut and ball screw nut mounted on the shaft. Auxiliary transmission can be made for linear motion, rotary motion or spiral motion. The mode of operation of the shaft depends on which one of the nuts depends on the direction of rotation and on the direction of rotation of the nut. For example, the axis moves linearly (Fig. 2a) under ballistic guidance in a stationary spline nut when only the ball screw nut is revolving, the line