The present invention relates to an electric power steering apparatus including a power transmission belt. The power transmission belt includes: an engagement part provided inside the power transmission belt where the power transmission belt is engaged with a motor pulley and a nut pulley; and a vibration reduction part provided outside the power transmission belt opposite to the engagement part. The engagement part is made of an elastic material, and the vibration reduction part is made of an elastic material that is less rigid than the engagement part. With this configuration, even if vibration and noise are generated from a motor, between the motor and a pulley, and between a belt and the pulley in the process of transmitting a torque of the motor, the vibration and the noise are reduced and prevented from being transferred to a peripheral component.

A power actuator assembly for a steering column assembly is provided. The power actuator assembly include an electric motor. Also included is a leadscrew. Further included is a gear arrangement operatively coupled to the electric motor, the gear arrangement driving rotation of the leadscrew. Yet further included is a nut threaded to the leadscrew, rotation of the leadscrew actuating linear motion of the nut relative to the leadscrew, the nut operatively coupled to a moveable portion of the steering column assembly to actuate motion of the moveable portion. Also included is a leadscrew housing, the leadscrew extending axially through the leadscrew housing. Further included is a helical bushing disposed between a radially inner surface of the leadscrew housing and a radially outer surface of the leadscrew.

A bearing arrangement for supporting an endless screw of a steering gear on a gear housing of the steering gear. The bearing arrangement including a radial bearing rotationally connected to the endless screw. A resilient retention element connecting the radial bearing to the gear housing. The retention element is connected at the radial bearing side to an outer face of an outer bearing ring and fixed to the outer face of the outer bearing ring in an axially non-movable manner with respect to a longitudinal center axis of the radial bearing.

A steering system with an actuating device (1), in particular a rear axle steering system, having a spindle drive (3) with a spindle (5) and a spindle nut (4) which is fitted into the housing (2) of the steering system in a positionally fixed but rotatable manner and is driven by an electric motor (9). The electric motor (9) is a vernier motor that drives the spindle drive (3) and is integrated in the spindle drive (3). The actuating device (1) is used for a rear axle steering system of a motor vehicle.

According to the embodiments of the present invention, the overall size reduction allows installation space to be advantageously secured, reduction in noise generated during operation improves the comfort of the driver, and the strength and stability of the connective structure between parts can be increased and power transmission can be more effective.

According to the present embodiments, it is possible to provide a steer-by-wire type steering apparatus which: limits a steering wheel operation of a driver within a maximum rotation angle, thereby increasing steering feel for the driver; prevents a clock spring installed on a steering wheel from being damaged, and enables parts to be manufactured and processed more easily; enables simple assembly; has small interference with surrounding parts, and thus the apparatus can be designed in various structures; and is advantageous in terms of packaging.

Implementations of a steering system may include: an arm configured to couple with a tie rod, the arm coupled through a journal bearing; a thrust bearing coupled to the journal bearing and to a nut; a screw rotatably coupled to an inverted planetary roller screw, the screw coupled with the nut; a rotor coupled to the nut and to a housing, the housing configured to be fixedly coupled to a frame; and a stator coupled to the housing and around the rotor and the inverted planetary roller screw where the stator is electrically coupled to a power source.

A steering wheel assembly for a vehicle includes a support member connectable to a vehicle steering column. A steering wheel has first and second rim portions. At least one of the first and second rim portions is pivotable about a pivot axis between a steering position and a folded position. At least one linear actuator is connected to the support member and operably connected to at least one of the first and second rim portions. Actuation of the linear actuator pivots at least one of the first and second rim portions about the pivot axis.

A rear wheel steering apparatus may include: a driving part housed in a housing part; a rotating part rotated by the driving part; a moving shaft part connected to tie rods, and screwed to the rotating part; a spline plate spline-coupled to the moving shaft part so as to restrict rotation of the moving shaft part; and a space maintaining part protruding from the moving shaft part or the spline plate, and maintaining a space between the moving shaft part and the spline plate.

Provided is a control device (14) for a power steering device including a steering mechanism (1) configured to transmit rotation of a steering wheel to a steered wheel, and an electric motor (13) configured to apply a steering force to the steering mechanism. The control device includes: a command signal calculation part (61) configured to calculate a motor command signal (Io) for control of driving of the electric motor, based on a state of steering of the steering wheel, and output the command signal to the electric motor; a vibration signal receiving part (69) configured to receive a vibration signal of the power steering device; and an abnormality determination part (63) configured to determine whether or not the power steering device is abnormal, based on a Y-axis acceleration signal (Gy) received by the vibration signal reception part.