본 발명은 자동차의 감속기에 관한 것으로, 웜과 웜휠을 포함하는 전동식 조향장치의 감속기에 있어서, 웜휠은, 조향축이 삽입되는 중공 형상으로 형성된 보스, 보스의 외주측에 일체로 형성되며 외주면에 산부와 골부가 형성되어 웜과 치합되는 기어부, 보스와 기어부의 측면에 구비되어 골부와 보스를 각각 지지하여 기어부에서 발생되는 마찰열을 보스로 전도시키는 열전도부재를 포함하여 웜휠의 마찰열을 보스로 방출시켜 웜휠의 팽창으로 인한 마모 및 노이즈를 방지한다.

    The present invention relates to a speed reducer for a vehicle. The speed reducer of an electric power steering system includes a worm and a worm wheel, wherein the worm wheel includes: a boss having an empty space into which a steering shaft is inserted; a gear part integrally formed with the outer circumferential surface of the boss and having crests and roots formed on the outer circumferential surface thereof so as to be engaged with the worm; and a heat conduction member provided on the side of the boss and the gear part to support the roots and the boss to conduct, to the boss, frictional heat generated from the gear part. Accordingly, the speed reducer releases frictional heat from the worm wheel to the boss to prevent wear and noise caused by expansion of the worm wheel.


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    Title :

    Reducer for vehicle


    Additional title:

    자동차의 감속기


    Contributors:

    Publication date :

    2017-06-29


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

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



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