| 摘要 |
PROBLEM TO BE SOLVED: To provide a transmission ratio variable steering device which can apply a preload to a bearing gear with a simple configuration.SOLUTION: A bearing reception part with steps is formed on the back face of a Z1 gear 34, and the Z1 gear 34 is supported on a thrust support part of an output shaft 19 in the bearing reception part by a thrust needle bearing 29 and a plate for rolling motion of the thrust needle bearing 29 so as to be relative rotatable. A wave washer 27 comprising an elastic member is provided in a clearance between the output shaft 19 and the plate to press the plate 31, the thrust needle bearing 29 and the Z1 gear 34 towards a center bearing 36 side in an axial direction. Thus, a preload is applied to a bearing gear 20. |
