| 主权项 |
1. A transmission unit for a muscular strength-powered vehicle, comprising:
a through shaft, wherein opposite sides of the through shaft are connectable to cranks for driving the vehicle, an output shaft connectable to a driven wheel of the vehicle, at least two sub-transmissions, and at least one intermediate shaft via which power can be transmitted from the through shaft to the output shaft, a plurality of loose wheels rotatably mounted on the intermediate shaft in both rotational directions, wherein the loose wheels mesh with a corresponding plurality of gear wheels, wherein each of the loose wheels is connectable rotationally fixed to the intermediate shaft in one rotational direction by means of one shiftable freewheel assembly, a shifting pin that actuates the freewheel assemblies in order to connect the loose wheels rotationally fixed to the intermediate shaft in the one rotational direction, wherein the shifting pin actuates the shiftable freewheel assemblies of two loose wheels assigned to different gear stages having different rotational speeds of the transmission unit simultaneously. |
