The invention disclosures a stage-variation variable speeds transmission bicycle, comprising a bicycle bracket, wherein the bicycle bracket is provided with a medial axis, a medial axis chain wheel group is arranged on the medial axis, medial axis chain wheel group comprises three chain wheels with different size; also comprising bicycle rear shaft, a freehub arranged on rear shaft, the freehub is fixed with a sun gear, one side of the sun gear is provided with a planetary carrier comprising planetary gears, a gear ring is provided radially outward of planetary gears, a ratchet is provided radially outward of the gear ring, the ratchet is provided with a pawl, the invention is easy to start and can be operated at a high speed, also can realize switch between the one-stage and two-stage transmission status arbitrarily during riding and parking to ensure a better cycling experience.


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    Title :

    STAGE-VARIATION VARIABLE SPEEDS TRANSMISSION BICYCLE


    Contributors:
    LI SHOUJIN (author)

    Publication date :

    2022-06-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

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



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