Drive assembly of an electric bicycle
US9227695B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 25, 2014 |
| Grant date | Jan 5, 2016 |
| Priority date | — |
| Expiry date | Jan 25, 2034 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB62M6/45
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A drive assembly of an electric bicycle is disclosed. A shell tube of an electric bicycle is transfixed with a crank shaft sheathed with an outer shaft set. The outer shaft set links to a tubular motor set. A first side of the crank shaft is provided with a left positioning set sheathed and limited in a left hole of the shell tube. A second side of the crank shaft is provided with a right positioning set sheathed and limited in a right hole of the shell tube. The right positioning set is fixed with a chain wheel set. A displacement of the crank shaft pulled by a bicycle chain is detected by a torque detection unit, and a torque is accessed by a control unit based upon the displacement to control the output power of the tubular motor set, thereby assisting pedaling the bicycle with feet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.