The invention discloses a bicycle speed variator, a bicycle, and a method and device for speed change of a bicycle. The bicycle speed variator comprises an information acquiring module used for acquiring the current riding information of the bicycle, a control panel used for saving acquired riding information, converting a tooth ratio sent by a communication module into a corresponding control signal and sending the control signal to a transmission, the communication module used for sending riding information to a server of a preset APP through the preset APP so that the server can calculate the tooth ratio according to riding information and user information from the preset APP, receiving the tooth ratio from the server through the preset APP and sending the tooth ratio to the control panel, and the transmission used for automatic gear shifting according to the received control signal. By the adoption of the bicycle speed variator, the bicycle, and the method and device for speed change of the bicycle, automatic gear shifting can be achieved according to information including user condition and road condition under the non-active control situation, so that a user is in the optimal riding state all the time.


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    Title :

    Bicycle speed variator, bicycle, and method and device for speed change of bicycle


    Contributors:
    YU KAI (author) / TAO JI (author) / GU JIAWEI (author) / YAN SHASHA (author)

    Publication date :

    2015-05-06


    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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