Steering device

A steering device configured to apply an assisting force to a steering mechanism by a motor, the steering device comprising:

• a housing;
• a steering rod accommodated in the housing to be allowed to reciprocate in an axial direction;
• a power transmission mechanism, which includes a rotating member configured to rotate by the motor and is configured to convert a rotation of the rotating member into a reciprocating motion of the steering rod thereby to transmit the reciprocating motion to the steering rod;
• and
• a rolling-element bearing, which rotationally supports the rotating member in the housing, wherein
• the rolling-element bearing includes an inner ring, an outer ring, first rolling elements, and second rolling elements,
• the first rolling elements and the second rolling elements are disposed side by side in an axial direction between the inner ring and the outer ring,
• the inner ring includes
• a first split race having a first inner peripheral track surface, on which the first rolling elements roll, and
• a second split race having a second inner peripheral track surface, on which the second rolling elements roll,
• the first split race includes an internal thread portion,
• the rotating member includes an external thread portion, onto which the internal thread portion is screwed,
• the rolling-element bearing is fixed to an outer periphery of the rotating member in a state where the first split race is screwed to the rotating member so that a load in the axial direction is applied to the first split race, the first rolling elements, the outer ring, the second rolling elements, and the second split race.

A steering device configured to apply an assisting force to a steering mechanism by a motor, the steering device comprising:

• a housing;
• a steering rod accommodated in the housing to be allowed to reciprocate in an axial direction;
• a power transmission mechanism, which includes a rotating member configured to rotate by the motor and is configured to convert a rotation of the rotating member into a reciprocating motion of the steering rod thereby to transmit the reciprocating motion to the steering rod;
• and
• a rolling-element bearing, which rotationally supports the rotating member in the housing, wherein
• the rolling-element bearing includes an inner ring, an outer ring, first rolling elements, and second rolling elements,
• the first rolling elements and the second rolling elements are disposed side by side in an axial direction between the inner ring and the outer ring,
• the inner ring includes
• a first split race having a first inner peripheral track surface, on which the first rolling elements roll, and
• a second split race having a second inner peripheral track surface, on which the second rolling elements roll,
• the rotating member has an outer peripheral surface provided with a groove portion adjacent to the rolling-element bearing, and
• the steering device further includes a holding member, which is fitted to the groove portion toward an inner side in a radial direction orthogonal to the axial direction in a state where the holding member is in contact with an end face of the inner ring and a stepped surface of the groove portion facing the end face to apply a biasing force in the axial direction to the end face of the inner ring.