Transmission assembly for use in drive assembly for electrical bicycle, has pedal crankshaft for connecting with pedal crank, electric drive wheel for connecting with electric motor and driven gear

摘要

The transmission assembly has a pedal crankshaft (20) for connecting with pedal crank (21), an electric drive wheel (12) for connecting with an electric motor (10) and a driven gear (28). A crank drive transmission shaft (30) is provided parallel to the pedal crankshaft, where a driven shaft (25) surrounds the pedal crankshaft. A pedal crank drive gear (22) is arranged on the pedal crankshaft. Independent claims are also included for the following: (1) a drive assembly for an electrical bicycle; and (2) a method for combined torque transmission in an electric bicycle.