Patent ID: 9168948
Filing Date: 2015-10-27
Classification: B62D

Abstract:
1. A steering system comprising: a steered shaft that makes a linear motion in a housing to steer steered wheels; a driving wheel that is disposed in the housing, and that rotates about an axis extending parallel to an axis of the steered shaft in response to driving of a motor; a ball nut screwed to the steered shaft via multiple balls, and supported via a bearing by an inner peripheral face of the housing so as to be rotatable relative to the inner peripheral face of the housing, the ball nut having a first end portion and a second end portion, a first flange being formed on an outer peripheral face of the first end portion and an inner-diameter-increased portion being formed in an inner peripheral face of the second end portion; a driven wheel fitted on an outer periphery of the ball nut to transmit rotation of the driving wheel to the ball nut; a hollow connection member including a connection portion inserted in and connected to the inner-diameter-increased portion, and a second flange; and a restricting member disposed along an inner peripheral face of the connection member, wherein the bearing and the driven wheel are held between the second flange and the first flange in an axial direction of the steered shaft when the connection portion is connected to the inner-diameter-increased portion, and the restricting member has at lease one protrusion passed through the connection portion and engaged with a groove formed in an inner peripheral face of the inner-diameter-increased portion, in the axial direction.