| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a suspension device onto which a load in a direction vertical to a shaft direction can be applied while a motion in a shaft direction of a second structure to a first structure is permitted. <P>SOLUTION: The suspension device includes a first bracket fixed to the first structure, a second bracket fixed to the second structure, a coil spring disposed so as to be freely expanded and contracted between the first and the second brackets, a screw shaft having a spiral screw groove in the outer circumferential surface thereof, a ball screw nut screwed with the screw shaft via a ball and assembled in the second bracket, a spline shaft which has a through-hole through which the screw shaft is penetrated, is formed in a substantially cylindrical shape and has a spline groove formed on the outer circumferential surface thereof along the shaft direction and whose one end is fixed to the ball screw nut, a spline nut assembled in the spline shaft via a ball and guiding the motion in the shaft direction of the second bracket to the first bracket, and a motor fixed to the first bracket and rotationally driving the spline nut. <P>COPYRIGHT: (C)2012,JPO&INPIT |
