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).
TRETLAGERSCHALTUNG MIT HOCHFESTEN ZAHNRÄDERN FÜR EIN FAHRRAD UND EIN FAHRRAD MIT EINER SOLCHEN TRETLAGERSCHALTUNG
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
2025-03-26
Patent
Electronic Resource
German
European Patent Office | 2023
|TRETLAGERSCHALTUNG FÜR EIN ELEKTROFAHRRAD UND ELEKTROFAHRRAD MIT EINER SOLCHEN TRETLAGERSCHALTUNG
European Patent Office | 2022
|European Patent Office | 2023
|European Patent Office | 2023
|European Patent Office | 2023
|