Embodiments of the present invention relate to a rack-driven power assist steering device. The present embodiments provide the rack-driven power assist steering device including: a rack bar that slides in an axial direction from the inside of a rack housing and has an outer circumferential screw groove formed on the outer circumferential surface; a ball nut that is provided with an inner circumferential screw groove corresponding to the outer circumferential screw groove of the rack bar on the inner circumferential surface, and has a ball circulation path penetrated in the axial direction between the inner and outer circumferential surfaces; an end cap that has a ball conveying hole to circulate a ball into the ball circulation path, the outer circumferential screw groove and the inner circumferential screw groove, and is coupled to one side and the other side of the ball circulation path; and a support member that is coupled to the inner circumferential surface of the ball nut while supporting the end cap in the axial direction.
본 실시예들은 랙구동형 동력 보조 조향장치에 관한 것으로, 본 실시예들은, 랙하우징의 내측에서 축방향으로 슬라이딩되며 외주면에 외주스크류홈이 형성되어 있는 랙바, 내주면에 랙바의 외주스크류홈에 대응되는 내주스크류홈을 구비하고, 내주면과 외주면 사이에는 축방향으로 관통된 볼순환로가 형성되어 있는 볼너트, 볼순환로와 외주스크류홈 및 내주스크류홈으로 볼이 순환되도록 볼반송홀이 구비되며 볼순환로의 일측과 타측에 결합되는 엔드캡, 엔드캡을 축방향으로 지지하면서 볼너트의 내주면에 결합되는 지지부재를 포함하는 랙구동형 동력 보조 조향장치를 제공한다.
Rack Assist Type Electric Power Steering Apparatus
랙구동형 동력 보조 조향장치
2020-09-16
Patent
Electronic Resource
Korean