The present invention relates to a steer-by-wire type power steering device. According to the embodiments of the present invention, the steer-by-wire type power steering device includes: a cylinder having a first spline on the inner circumferential surface, formed in a hollow shape, and installed in a housing; a spline shaft having a second spline engaged with the first spline on the outer circumferential surface and inserted into the cylinder; and a screw bar installed in the spline shaft and steering a wheel by sliding in an axial direction by an actuator. The steer-by-wire type power steering device reduces friction and noise when sliding in the axial direction in a structure of preventing rotation of the screw bar. The steer-by-wire type power steering device can reinforce durability and rigidity by offsetting torque received by the screw bar. Also, the structure of preventing the rotation of the screw bar and the screw bar are not integrally formed, but are separately manufactured. So, the steer-by-wire type power steering device is separatedly manufactured and then connected to the inside of the housing to improve convenience in manufacturing and assembly. Therefore, the steer-by-wire type power steering device can improve stability of axial and longitudinal movements in a connection part.

    본 실시예들에 의한 스티어 바이 와이어식 동력 보조 조향장치는, 하우징 내부에 구비되되 중공형상으로 형성되어 내주면에 제 1 스플라인이 형성되는 실린더, 실린더에 삽입되되 외주면에 제 1 스플라인과 맞물리는 제 2 스플라인이 형성되는 스플라인축, 스플라인축에 구비되되 액추에이터에 의해 축방향으로 슬라이딩되며 바퀴를 조타하는 스크류바를 포함하여, 스크류바의 회전을 방지하는 구조에서 축방향으로 슬라이딩될 때 마찰과 소음이 저감되고 스크류바로부터 받는 토크가 상쇄되어 내구성과 강도가 강화될 수 있으며, 또한 스크류바의 회전을 방지하는 구조와 스크류바가 일체로 형성되는 것이 아니라 별개로 제작되어 하우징 내부에 결합됨으로써 제작 및 조립 편의성이 향상되며, 결합부위에서의 축방향 및 경방향 유동에 대한 안정성을 향상시킬 수 있다.


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    Title :

    Steer-by-wire Type Power Steering Apparatus


    Additional title:

    스티어 바이 와이어식 동력 보조 조향장치


    Contributors:

    Publication date :

    2020-03-12


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



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