The invention relates to a bottom bracket gear shift device (10) with high-strength gear wheels, 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 (189) 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 is characterized in that at least four idler wheels (109) which are mounted on the selector shaft (67) are equipped with at least one respective inner toothing (57), and the wheel pairs (189) are connected together via an outer toothing (190). In addition, the at least two idler wheels (109) are connected to at least two the drive gear wheels (41, 42) and at least two output gear wheels (37, 38) via the outer toothing (190), and teeth of the outer toothing (190) are connected together at least partly laterally via a connecting piece (191) at least on one drive gear wheel (41, 42), on an output gear wheel (37, 37), or on an idler wheel (109).


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    Title :

    TRETLAGERSCHALTUNG MIT HOCHFESTEN ZAHNRÄDERN FÜR EIN FAHRRAD UND EIN FAHRRAD MIT EINER SOLCHEN TRETLAGERSCHALTUNG


    Additional title:

    BOTTOM BRACKET GEAR SHIFT DEVICE WITH HIGH-STRENGTH GEAR WHEELS FOR A BICYCLE, AND BICYCLE COMPRISING SUCH A BOTTOM BRACKET GEAR SHIFT DEVICE
    DISPOSITIF DE CHANGEMENT DE VITESSE DE JEU DE PÉDALIER À ROUES D'ENGRENAGE À HAUTE RÉSISTANCE 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