| 摘要 |
PROBLEM TO BE SOLVED: To easily control rotation and axial movement by preventing the rapid axial movement of a ball screw shaft in a ball screw device with splines. SOLUTION: The ball screw device with splines includes the ball screw shaft which has axially linear spline grooves and spiral ball screw grooves at the same portion on the outer circumference of one shaft. Either a spline nut or a ball screw nut is rotated by a driving source for main drive. Shaft rotation is given to the ball screw shaft by rotating the other similarly by the driving source for main drive via a differential gear unit. Also, by driving the differential gear unit by a driving source for a differential drive, a differential rotation is given between the spline nut and the ball screw nut to move the ball screw shaft in the axial direction. COPYRIGHT: (C)2011,JPO&INPIT
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