| 摘要 |
A ball screw device includes a screw shaft; a ball nut; a first deflector fitted to an end portion of the ball nut; a ball guide portion that guides balls positioned in a helical inner ball passage formed by the ball nut and the screw shaft, to a first end portion ball passage in the first deflector; the balls that are set to form a row extending in the inner ball passage and the first end portion ball passage; and a first elastic member having a base end that is positioned in the first end portion ball passage and a distal end that is disposed and accommodated in the first end portion ball passage so as to be able to contact the ball positioned at one end of the row of the balls. |
