Patent ID: 8454039

Claim:
A vehicle steering system, comprising: a steering member; steered wheels; a steered shaft that moves in an axial direction that extends along a lateral direction of a vehicle in response to an operation of the steering member to thereby steer the steered wheels; a housing that supports the steered shaft such that the steered shaft is movable in the axial direction; a fitting bracket that is formed on the housing and that has a first bolt insertion hole; a vehicle body-side member that has a second bolt insertion hole; and a bolt that is inserted through the first bolt insertion hole and the second bolt insertion hole to fasten the fitting bracket to the vehicle body-side member, wherein; one of the first bolt insertion hole and the second bolt insertion hole is a long hole that extends in the lateral direction; in an emergency situation where a reverse input equal to or larger than a predetermined value is applied from a road surface to the steered wheels, the bolt is displaced within the long hole in the lateral direction, causing the fitting bracket to displace with respect to the vehicle body-side member in the lateral direction; the long hole has a center portion in which the bolt is fitted in a normal situation, and paired emergency position keeping portions that are formed on respective sides of the center portion and used to keep a position of the bolt that has been displaced in the emergency situation; the emergency position keeping portions are plastically deformable; a width of each of the emergency position keeping portions is smaller than an outer diameter of the bolt; and an edge portion of the center portion of the long hole is in a curved recess shape such that the bolt is loosely fitted in the center portion.