The invention relates to a bottom bracket gear shift device (10) with a shift device (188), in particular for a muscle-powered vehicle, comprising a gearing mechanism that has a selector shaft (67) on which a plurality of idler wheels (109) are mounted, said idler wheels forming wheel pairs together with a corresponding plurality of gear wheels, wherein the idler wheels (109) can be connected to the selector shaft (67) by means of coupling bodies (58). The bottom bracket gear shift device (10) is characterized in that the selector shaft (67) has two or more chambers (143) which are arranged parallel or virtually parallel to an axis of the selector shaft (67), and the two or more chambers (143) of the selector shaft (67) are designed to not be coaxial to the axis of the selector shaft (67). Additionally, a respective pivotal support (114) is located within at least two chambers (143). A pivotal support (114) can assume a first state in which the pivotal support (114) is directly or indirectly connected to precisely one coupling body (58), and in the first state, the coupling body (58) can be brought into a force-transmitting connection with an idler wheel (109). Additionally, the lateral surface of the selector shaft (67) has depressions (107) in which coupling bodies (58) are located, and at least two depressions (107) are connected to at least one chamber (143) via a respective opening (119).


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    Title :

    TRETLAGERSCHALTUNG MIT SCHALTVORRICHTUNG FÜR EIN FAHRRAD UND EIN FAHRRAD MIT EINER SOLCHEN TRETLAGERSCHALTUNG


    Additional title:

    BOTTOM BRACKET GEAR SHIFT DEVICE WITH SHIFT DEVICE FOR A BICYCLE, AND BICYCLE COMPRISING SUCH A BOTTOM BRACKET GEAR SHIFT DEVICE
    DISPOSITIF DE CHANGEMENT DE VITESSE DE JEU DE PÉDALIER AVEC DISPOSITIF DE CHANGEMENT DE VITESSE POUR UNE BICYCLETTE, ET BICYCLETTE COMPRENANT UN TEL DISPOSITIF DE CHANGEMENT DE VITESSE DE JEU DE PÉDALIER


    Contributors:

    Publication date :

    2025-03-26


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    German


    Classification :

    IPC:    B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer / F16H Getriebe , GEARING