The present invention relates to a master cylinder including: a cylinder housing; a piston installed in the cylinder housing to be able to move to have a pressure chamber and a fluid supply chamber; and a sealing member installed between the cylinder housing and the piston. A recessed unit is formed on the outer circumference of the piston, and the rear wall of the recessed unit is formed as an inclined surface. Multiple first connection holes are formed on the bottom of the recessed unit, and a second connection hole is formed on the rear wall of the recessed unit. A connection hole for forming a flow path for generating pressure and a connection hole for forming a flow path for preventing a drag are formed on the front side and the rear side, respectively. The rear wall of the recessed unit formed on the outer circumference of the piston is formed as the inclined surface. The connection hole formed on the rear to prevent the drag is formed on the rear wall formed as the inclined surface. Therefore, a contact angle between the sealing member and a part forming an inlet of the connection hole is reduced, so damage to the sealing member can be reduced.

    마스터 실린더는 실린더 하우징, 압력실과 유체 공급실을 형성하도록 상기 실린더 하우징에 이동 가능하게 설치되는 피스톤, 그리고 상기 실린더 하우징과 상기 피스톤 사이에 개재되는 실링 부재를 포함한다. 상기 피스톤의 외주면에는 함몰부가 구비되며, 상기 함몰부의 후방 벽은 경사면으로 형성되고, 상기 함몰부의 바닥 면에 복수의 제1 연통구가 형성되고 상기 함몰부의 후방 벽에 제2 연통구가 형성된다. 압력 생성을 위한 유로를 형성하는 연통구와 드래그 방지를 위한 유로를 형성하는 연통구를 전방 및 후방에 각각 형성하되 피스톤의 외주면에 형성되는 함몰부의 후방 벽을 경사면으로 하고 드래그 방지를 위해 후방에 형성되는 연통구를 경사면으로 형성되는 후방 벽에 형성함으로써, 실링 부재가 연통구의 입구를 형성하는 부분과 접촉하는 각도가 감소되어 실링 부재의 손상을 줄일 수 있다.


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    Title :

    MASTER CYLINDER FOR VEHICLES


    Additional title:

    차량용 마스터 실린더


    Contributors:
    JO JU HYUNG (author) / LEE DONG HYUN (author)

    Publication date :

    2015-10-20


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    B60T Bremsanlagen für Fahrzeuge oder Teile davon , VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF



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