The invention discloses a variable-amplitude labor-saving crank of a bicycle, and relates to the technical field of bicycle cranks, the crank comprises a main handle, an auxiliary handle, a sliding pin and a connecting handle, one end of the main handle is fixedly connected with a middle axle of the bicycle; the auxiliary handle is movably connected with the main handle through a sliding pin and a connecting handle and rotationally connected with the pedal through a pedal shaft. One end of the auxiliary handle is fixedly connected with the pedal shaft, a first pin hole is formed in the other end of the auxiliary handle, and a second pin hole is formed in the rod body portion close to the first pin hole. The problems that the left pedal and the right pedal of the bicycle cannot be driven when entering the dead point position at the same time, and the leg straightening degree is insufficient when a rider treads the bicycle are solved.

    本发明公开了一种自行车变幅省力曲柄,涉及自行车曲柄技术领域,该曲柄包括主柄、副柄、滑销和联柄,主柄的一端与自行车中轴固定连接;副柄通过滑销和联柄与主柄活动连接,通过踏板轴与踏板转动连接;副柄的一端与踏板轴固定连接,另一端设有第一销孔,并在靠近第一销孔的杆身部位设有第二销孔。本发明解决了自行车的左右踏板同时进入死点位置时无法驱动以及骑行人踩踏时的腿部伸直程度不足的问题。


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    Title :

    Variable-amplitude labor-saving crank of bicycle


    Additional title:

    一种自行车变幅省力曲柄


    Contributors:
    WANG HONGMING (author) / WANG JIANBO (author) / HE CAO (author) / ZHONG MEI (author)

    Publication date :

    2024-08-02


    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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