The present invention relates to a gearless transmission device for a bicycle. The gearless transmission device for a bicycle comprises: a driving pulley and a driven pulley individually having an inclined belt groove which becomes narrower from an outer circumference towards a center; a variable chain belt rotated by being inserted into the inclined belt groove, wherein turning radiuses in the driving pulley and the driven pulley are changed respectively as an insertion position in each inclined belt groove is varied depending on an increase and decrease of a width thereof; a first transmission operation unit automatically increasing and decreasing the width of the variable chain belt coming into the driving pulley depending on a load of the driven pulley and a rotational force of the driving pulley; and a second transmission operation unit increasing and decreasing the width of the variable chain belt coming into the driven pulley to be opposite to the first transmission operation unit by being interlocked with the first transmission operation unit. According to the present invention, gears can automatically be shifted in accordance with the load of the driven pulley, and the rotational force of the driving pulley can manually be shifted as necessary. As such, the gearless transmission device can smoothly and stably deliver power.

    본 발명은 자전거 무단변속장치에 관한 것으로서, 외주부로부터 중심부를 향해 폭이 점감하는 형태의 경사벨트홈이 각각 형성된 구동풀리 및 종동풀리와, 상기 경사벨트홈에 끼워져 회전하되, 자체 폭의 증감에 따라 각각의 경사벨트홈에서의 끼움위치가 변위되면서 구동풀리와 종동풀리에서의 회전반경이 각각 변경되는 가변체인벨트와, 상기 구동풀리의 회전력과 종동풀리의 부하에 따라 구동풀리로 진입하는 가변체인벨트의 폭을 자동 증감시키는 제1변속작동부와, 상기 제1변속작동부에 연동하여 종동풀리로 진입하는 가변체인벨트의 폭을 상기 제1변속작동부와는 반대로 증감시키는 제2변속작동부를 포함한다. 이러한 본 발명에 따르면, 구동풀리의 회전력과 종동풀리의 부하에 따라 자동으로 변속이 이루어짐과 함께 필요한 경우 수동으로도 변속이 가능하며, 보다 원활하고 안정적인 동력전달작동이 이루어질 수 있는 효과가 있다.


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    Titel :

    GEARLESS TRANS DEVICE FOR BICYCLE


    Weitere Titelangaben:

    자전거 무단변속장치


    Beteiligte:
    KANG SANG KAK (Autor:in)

    Erscheinungsdatum :

    30.10.2015


    Medientyp :

    Patent


    Format :

    Elektronische Ressource


    Sprache :

    Koreanisch


    Klassifikation :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer / F16H Getriebe , GEARING



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