A drive assembly of an electric bicycle comprises a shell tube 1 of an electric bicycle is transfixed with a crank shaft 2 sheathed with an outer shaft set 3. The outer shaft set 3 links to a tubular motor set 4. A first side of the crank shaft is provided with a left positioning set 5 sheathed and limited in a left hole of the shell tube 1. A second side of the crank shaft is provided with a right positioning set 6 sheathed and limited in a right hole 10 of the shell tube 1. The right positioning set 6 is fixed with a chain wheel set. A displacement of the crank shaft 2 pulled by a bicycle chain is detected by a torque detection unit A, and a torque is accessed by a control unit based upon the displacement to control the output power of the tubular motor set 4, thereby assisting pedaling the bicycle with feet.
Drive Assembly of an electric bicycle
2015-07-15
Patent
Elektronische Ressource
Englisch
IPC: | B62M RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES , Antrieb von Radfahrzeugen oder Schlitten durch den Fahrer |
Electric bicycle drive assembly with torque detection
Europäisches Patentamt | 2018
|