The invention discloses an improved bicycle frame structure, which improves riding quality and the internal congestion of a hub, simplifies the hub structure, and reduces the manufacturing difficulty of the hub. The adopted technical scheme is as follows: a rear fork foot and a front fork foot are arranged with internal bearing positions so that a rear wheel carrying bearing and a front wheel bearing are respectively and correspondingly assembled in the respective internal bearing positions, the front fork foot and the front wheel bearing are fixedly connected in a penetrating mode through a front wheel hub fixing pin, a front wheel hub is sleeved on the front wheel hub fixing pin, a corresponding bearing is not required to be arranged in the front wheel hub, the rear fork foot and the rear wheel carrying bearing are fixedly connected in a penetrating mode through a rear wheel hub fixing pin, a rear wheel hub is sleeved on the rear wheel hub fixing pin, a corresponding bearing is not required to be arranged in the rear wheel hub, two ends of a five-way transverse straight-through pipe are respectively arranged with outer bearing positions, crank bearings are sleeved on the outer bearing positions, a crank is sleeved on the outer side of the crank bearing, a main shaft of the crank is arranged to penetrate through the five-way transverse straight-through pipe, and the two cranks are fixedly connected.


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    Title :

    IMPROVED BICYCLE FRAME STRUCTURE


    Additional title:

    VERBESSERTE FAHRRADRAHMENSTRUKTUR
    STRUCTURE DE CADRE DE BICYCLETTE AMÉLIORÉE


    Contributors:
    YU XIAOAI (author)

    Publication date :

    2022-04-13


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    English


    Classification :

    IPC:    B62K Fahrräder , CYCLES / B60B VEHICLE WHEELS , Räder für Fahrzeuge / B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer



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