Electric power sterring apparatus for automobile

摘要

An electrical power steering apparatus for an automobile includes a pinion shaft connected to a steering wheel of the automobile and having a pinion gear formed on a side; a rack bar connected to a wheel of the automobile and having a rack gear adapted to engage with the pinion gear; a motor for generating steering power in proportion to steering torque generated by the steering wheel; a power transmission means connected to a motor shaft of the motor; an intermediate shaft rotatably connected to the power transmission means and having a ball screw positioned on an outer peripheral surface; a ball screw unit having a ball adapted to contact the ball screw and a ball nut adapted to engage with the ball screw via the ball; and a connection member having an upper end coupled to the ball nut and a lower end coupled to the rack bar.