| 摘要 |
An electric power steering apparatus for an automobile includes a pinion shaft connected to a steering wheel of the automobile; a rack bar having a ball screw formed on an outer peripheral surface thereof; a motor for generating steering power; a motor pulley positioned on a motor shaft of the motor; a motor pulley housing for enclosing the motor shaft and the motor pulley; a self-aligning bearing positioned between an outer peripheral surface of an end of the motor shaft and an inner peripheral surface of the motor pulley housing; a ball nut adapted to engage with the ball crew via a ball; a ball nut pulley positioned on an outer peripheral surface of the ball nut; and a belt for connecting the motor pulley and the ball nut pulley to each other. The self-aligning bearing positioned on the motor shaft makes it possible to simplify the structure of the belt-type transmission device, reduce the number of components, and decrease the manufacturing cost.
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