Hub gearshift for hybrid drive train of bike, has two power paths, which are provided between gearbox input and downstream gear set, where shaft of downstream gear set is connectable with former power path by switching element

摘要

The hub gearshift has a gearbox input shaft (1), a gearbox output shaft (2), an upstream gear set and a downstream gear set formed by two single planetary gear sets (P3,P4). Two power paths are provided between a gearbox input and the downstream gear set. The former power path is provided with a fixed transmission ratio and the latter power path is provided with another fixed transmission ratio. The latter fixed transmission ratio is lesser than the former power ratio. The secondary shaft (W6) of the downstream gear set is connectable with the former power path by a switching element (D3). An independent claim is included for a hybrid drive train for a bike.