본 발명은 랙구동형 동력 보조 조향장치에 관한 것으로, 모터의 회전력을 전달받아 회전하며 내주면에 내주스크류홈이 형성된 볼너트 및 외주면에 외주스크류홈이 형성된 외주스크류홈 형성부가 구비되어 볼너트와 볼을 매개로 결합되되, 외주스크류홈은 제1곡면부와 제2곡면부가 연결되어 형성되고, 제1곡면부에 볼이 접하는 접선에 수직인 선과 제2곡면부에 볼이 접하는 접선에 수직인 선이 이루는 접촉각이 외주스크류홈 형성부의 중심부에서 양단부로 갈수록 작아지게 형성되는 랙바를 포함하여 랙바에 형성되는 외주스크류홈의 가운데에서 볼의 구름운동시 발생되는 프릭션을 낮추며, 랙바에 형성되는 외주스크류홈의 양단부에서 볼에 전달되는 수직방향 외력을 분산시킨다.

    The present disclosure relates to a rack assist type power steering apparatus that includes: a ball nut that is rotated by the rotating force transmitted from a motor and has an internal screw groove formed in the inner circumferential surface thereof; and a rack bar that has an external-screw-groove-formed part that has an external screw groove formed in the outer circumferential surface thereof, and is coupled with the ball nut by a ball, wherein the external screw groove has a first curved portion and a second curved portion connected to each other, and is formed such that a contact angle formed by a line that is normal to a tangent line at a point where the ball makes contact with the first curved portion and a line that is normal to a tangent line at a point where the ball makes contact with the second curved portion gradually decreases from the central portion toward opposite end portions of the external-screw-groove-formed part, thereby reducing friction generated when the ball performs a rolling motion in the middle of the external screw groove that is formed in the rack bar and distributing the load acting on the ball in the opposite end portions of the external screw groove that is formed in the rack bar.


    Zugriff

    Download


    Exportieren, teilen und zitieren



    Titel :

    Rack Assist Type Power Steering Apparatus


    Weitere Titelangaben:

    랙구동형 동력 보조 조향장치


    Erscheinungsdatum :

    11.01.2022


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    B62D MOTOR VEHICLES , Motorfahrzeuge



    Rack assist type power steering apparatus

    BAE JAE HOON | Europäisches Patentamt | 2019

    Freier Zugriff

    Rack Assist Type Power Steering Apparatus

    JEON IN HWAN | Europäisches Patentamt | 2023

    Freier Zugriff

    Rack assist type power steering apparatus

    JEON INHWAN | Europäisches Patentamt | 2024

    Freier Zugriff

    Rack Assist Type Power Steering Apparatus

    OH JIN SU | Europäisches Patentamt | 2017

    Freier Zugriff

    Rack Assist Type Power Steering Apparatus

    BAE JAE HOON | Europäisches Patentamt | 2017

    Freier Zugriff