| 摘要 |
PROBLEM TO BE SOLVED: To provide a steering system in which the operation stability of a steering wheel under high-speed run is improved, the steering system being suitable for a steering system which includes a rolling bearing rotatably journaling a steering shaft and includes an upper column and a lower column fitted to each other axially slidably .SOLUTION: When an inner ring 422 of an angular ball bearing 42 is pressed by tightening a lock nut 61A and a preload is given between an outer ring 421A and the inner ring 422 and between outer rings 421B and 423, backlash of the angular ball bearing 42 becomes smaller, and rotational torque of a lower steering shaft 32 and of an upper steering shaft gradually becomes larger. At a point of time when the rotational torque of the lower steering shaft 32 and of the upper steering shaft becomes predetermined magnitude, a left lock nut 61B is tightened and brought into close contact with the right lock nut 61A. |
