Embodiments of the present invention relate to a rack assist type power steering apparatus and, more specifically, to a rack assist type power steering apparatus, comprising: a ball nut coupled to a rack bar via a ball and including a stepped portion radially protruding from one side end thereof; a nut pulley coupled to the outer circumferential surface of the ball nut; a support member which supports the nut pulley in an axial direction and is coupled to the other side end of the ball nut; and a rotation support member including a first inner ring and a second inner ring sequentially coupled between the stepped portion and the nut pulley while being axially spaced apart from the outer circumferential surface of the ball nut, an outer ring coupled to the inner circumferential surface of a housing, and a rolling element provided between each of the first inner ring and the second inner ring and the outer ring to be rotatably supported. The shock between the rotation support member and the housing is absorbed, and rotational torque due to backlash and friction inside the rotation support member is reduced. The rotation support member is supported at a portion coupled with the rack bar of the ball nut while the length of the ball nut is minimized, thereby reducing noise.

    본 실시예들은 랙구동형 동력 보조 조향장치에 관한 것으로서, 보다 상세하게는 랙바와 볼을 매개로 결합되며 일측단에 경방향으로 돌출되는 단턱부가 구비되는 볼너트, 볼너트의 외주면에 결합되는 너트풀리, 너트풀리를 축방향으로 지지하며 볼너트의 타측단에 결합되는 지지부재, 단턱부와 너트풀리의 사이에서 볼너트의 외주면에 축방향으로 이격되며 순차적으로 결합되는 제 1 내륜과 제 2 내륜, 하우징의 내주면에 결합되는 외륜, 제 1 내륜과 제 2 내륜 각각과 외륜의 사이에 구비되어 회전지지되는 전동체가 구비되는 회전지지부재를 포함하여, 회전지지부재와 하우징 사이의 충격이 흡수되고 회전지지부재 내부의 백래쉬와 마찰에 의한 회전토크가 저감되며, 볼너트 길이가 최소화되면서 회전지지부재가 볼너트의 랙바와 결합되는 부위에 지지되어 노이즈가 감소될 수 있다.


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    Titel :

    Rack Assist Type Electric Power Steering Apparatus


    Weitere Titelangaben:

    랙구동형 동력 보조 조향장치


    Beteiligte:
    JEON IN HWAN (Autor:in)

    Erscheinungsdatum :

    30.03.2020


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    F16H Getriebe , GEARING / B62D MOTOR VEHICLES , Motorfahrzeuge



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