The invention relates to a crank device with a labor-saving mechanism and a bicycle crank assembly, the crank device comprises a crank mechanism, a transmission mechanism, a supporting assembly and a rotary arm assembly, and the crank mechanism comprises a crank, a shaft end gear and a pedal end gear; the transmission mechanism comprises a rotating shaft, a first gear and a second gear. Annular grooves are formed in the two ends of the rotating shaft. The supporting assembly is connected to the rotating shaft in a sleeving mode and comprises an outer ring and balls, and the balls are contained in the annular grooves and clamped between the rotating shaft and the outer ring. The rotating arm assembly comprises a first rotating arm and a second rotating arm, one end of the second rotating arm is connected with the first rotating arm, and the other end of the second rotating arm is connected with the pedal end gear. Therefore, the transmission stability can be improved, and the service life can be prolonged.

    本申请关于一种具有省力机制的曲柄装置及自行车曲柄总成,曲柄装置包括曲柄机构、传动机构、支承组件及旋臂组件,曲柄机构包括曲柄、轴端齿轮及踏板端齿轮;传动机构包括转轴、第一齿轮及第二齿轮,转轴的两端设有环形沟;支承组件套接在转轴且包括外环圈及滚珠,滚珠容置在环形沟并分别被夹持在转轴和外环圈之间;旋臂组件包括第一旋臂及第二旋臂,第二旋臂的一端连接第一旋臂,第二旋臂的另一端则连接踏板端齿轮。借此,可提升传动时的稳定度和延长使用寿命。


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    Title :

    Crank device with labor-saving mechanism and bicycle crank assembly


    Additional title:

    具有省力机制的曲柄装置及自行车曲柄总成


    Contributors:
    LIN XUANZHI (author) / LIN KAIWEN (author)

    Publication date :

    2024-09-24


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Chinese


    Classification :

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



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