Resultant force transmitting body (29) which is freely rotatable by a resultant force that is a combination of a human power driving force and an auxiliary driving force, driving sprocket (13) to which rotation of resultant force transmitting body (29) is transmitted, and a gear shift mechanism which includes a plurality of selectable gear shift stages having different gear ratios and transmits a driving force to the resultant force transmitting body, are provided in driving unit (20) installed at an intermediate location between a front wheel and a rear wheel. The gear shift mechanism includes a plurality of transmission gears and switching body moving portion (62) that moves in accordance with a selected gear shift stage, and an electric switching device which includes a gear shift stage switching motor that is a gear shift stage switching driving source that generates a driving force which moves switching body moving portion (62) is installed in driving unit (20).


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    Title :

    ELECTRIC-ASSIST BICYCLE


    Additional title:

    FAHRRAD MIT ELEKTRISCHEM HILFSFANTRIEB
    BICYCLETTE À ASSISTANCE ÉLECTRIQUE


    Contributors:

    Publication date :

    2019-09-11


    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 / F16D COUPLINGS FOR TRANSMITTING ROTATION , Nicht schaltbare Kupplungen / F16H Getriebe , GEARING