A steering column for a steer-by-wire steering system include a steering shaft that is connectable to a steering wheel and is received in an inner steering column tube such that the steering shaft is rotatable about a longitudinal axis. An outer steering column tube may receive the inner tube such that the inner tube can be displaced along the longitudinal axis. The outer tube may be connectable to a vehicle chassis. The steering column may also include a feedback actuator having an electric motor that drives the steering shaft via a drive component that is connected to the steering shaft for the transmission of torque. The drive component may have a recess with a maximum inscribed diameter that is greater than an external diameter of the inner tube, and the recess may be disposed on a side of the drive component that faces the inner tube.

A noise reduction apparatus for an electric power steering system may include a worm wheel rotatably and integrally coupled to a steering shaft connected to a steering wheel; a worm gear shaft to be rotatably operated by rotational force of an electric motor and formed with a worm gear to be meshed with the worm wheel; a tilt bearing provided between the worm gear shaft and the electric motor to rotatably support one end of the worm gear shaft; a support bearing for rotatably supporting the other end of the worm gear shaft; a plurality of pressing pins for pressing the support bearing; and a plurality of elastic members for elastically supporting the plurality of pressing pins respectively.

A noise reduction apparatus for an electric power steering system may include a worm wheel rotatably and integrally coupled to a steering shaft connected to a steering wheel; a worm gear shaft to be rotatably operated by rotational force of an electric motor and formed with a worm gear to be meshed with the worm wheel; a tilt bearing provided between the worm gear shaft and the electric motor to rotatably support one end of the worm gear shaft; a support bearing for rotatably supporting the other end of the worm gear shaft; a plurality of pressing pins for pressing the support bearing; and a plurality of elastic members for elastically supporting the plurality of pressing pins respectively.

An independent suspension system for a vehicle includes: a steering unit configured to be controlled to adjust the steering angle of a wheel, a shock absorber engaged with the wheel and configured to absorb impacts applied to the wheel and including a first shock absorber and a second shock absorber, each of which arranged in a forward-rearward direction on opposite side surfaces of the wheel, and a link unit disposed between the shock absorber and the steering unit in order to vary the distance between the wheel and the steering unit. The link unit includes a first upper arm disposed between the first shock absorber and the steering unit, a second upper arm disposed between the second shock absorber and the steering unit, and at least one ground clearance adjustment unit engaged with the first and second upper arms in order to vary the distance between the first and second upper arms.

An independent suspension system for a vehicle includes: a steering unit configured to be controlled to adjust the steering angle of a wheel, a shock absorber engaged with the wheel and configured to absorb impacts applied to the wheel and including a first shock absorber and a second shock absorber, each of which arranged in a forward-rearward direction on opposite side surfaces of the wheel, and a link unit disposed between the shock absorber and the steering unit in order to vary the distance between the wheel and the steering unit. The link unit includes a first upper arm disposed between the first shock absorber and the steering unit, a second upper arm disposed between the second shock absorber and the steering unit, and at least one ground clearance adjustment unit engaged with the first and second upper arms in order to vary the distance between the first and second upper arms.

Provided is an electric assisted power steering apparatus having a structure able to disconnect a worm shaft from any malfunctioning motor of motors connected to opposite end portions of the worm shaft, thereby preventing the worm shaft from rotating heavily or failing to rotate. Even in the case in which the worm shaft is disconnected from the malfunctioning motor, a target rotation speed of the properly-operating motor is increased to prevent sudden changes in auxiliary torque occurring on a steering shaft, thereby promoting the safety of a driver. Torque required for the worm shaft is distributed to the two motors, thereby increasing the rotation speeds of the motors and reducing the size and fabrication costs of the motors.

Provided is an electric assisted power steering apparatus having a structure able to disconnect a worm shaft from any malfunctioning motor of motors connected to opposite end portions of the worm shaft, thereby preventing the worm shaft from rotating heavily or failing to rotate. Even in the case in which the worm shaft is disconnected from the malfunctioning motor, a target rotation speed of the properly-operating motor is increased to prevent sudden changes in auxiliary torque occurring on a steering shaft, thereby promoting the safety of a driver. Torque required for the worm shaft is distributed to the two motors, thereby increasing the rotation speeds of the motors and reducing the size and fabrication costs of the motors.

A wheel steering system includes a steering device arranged on a steerable wheel, a signal execution device and a steering angle control device. The steering device includes a wheel support rotatably connected to a chassis by a slewing bearing, a bottom of the wheel support is rotatably connected to two ends of a rotary shaft of the steerable wheel, and the wheel support is configured to drive the steerable wheel to turn by 360 degrees through the slewing bearing. The signal execution device is configured to control an angle of rotation of the steerable wheel driven by the slewing bearing. The steering angle control device includes a plurality of reciprocating switch rotors, and the plurality of switch rotors are configured to send electrical signals of steering angles to the signal execution device.

A wheel steering system includes a steering device arranged on a steerable wheel, a signal execution device and a steering angle control device. The steering device includes a wheel support rotatably connected to a chassis by a slewing bearing, a bottom of the wheel support is rotatably connected to two ends of a rotary shaft of the steerable wheel, and the wheel support is configured to drive the steerable wheel to turn by 360 degrees through the slewing bearing. The signal execution device is configured to control an angle of rotation of the steerable wheel driven by the slewing bearing. The steering angle control device includes a plurality of reciprocating switch rotors, and the plurality of switch rotors are configured to send electrical signals of steering angles to the signal execution device.

An electric power steering system includes an electric motor including a motor output shaft. The system also includes a worm operatively coupled to the motor output shaft. The system further includes a worm gear in contact with the worm and operatively coupled to an auxiliary shaft. The system yet further includes a drive gear operatively coupled to the auxiliary shaft. The system also includes a driven gear in contact with the drive gear and operatively coupled to an input shaft to drive a manual recirculating ball steering gear.