| 摘要 |
The present invention relates to an electric power auxiliary steering apparatus and, more specifically, provides an electric power auxiliary steering apparatus which comprises: a motor pulley transferring a driving force of a motor through a belt; a ball nut which is coupled to a rack bar through a ball, rotates, and slides the rack bar; a nut pulley mounted on the outer circumferential surface at one side of a ball nut, and coupled to the belt; a bearing mounted on the outer circumferential surface at the other side of the ball nut to support rotation; and a rack housing having a cylinder hole into which the bearing is inserted, wherein the cylinder hole is formed as a number of curved surfaces are connected in a circumferential direction. |
