Freewheel hub comprising a magneto-elastic sensor and bicycle, pedelec, fast pedelec or e-bike comprising the freewheel hub
US9284998B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 2014 |
| Grant date | Mar 15, 2016 |
| Priority date | — |
| Expiry date | Apr 28, 2034 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D41/24
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A freewheel hub and a bicycle, pedelec, fast pedelec or e-bike comprising this freewheel hub is provided. The freewheel hub includes a rotating hub shell for carrying a free running wheel. Torque is coupled to the rotating hub shell via a torque transmitting member. At least one magneto-elastically active region is directly or indirectly attached to or forms a part of the torque transmitting member in such a manner that the applied torque is transmitted to the active region including at least one magnetically polarized region. The magnetic polarization becomes increasingly helically shaped as the applied torque increases. A magneto-elastic sensor including at least one magnetic field sensor is arranged proximate to the at least one magneto-elastically active region for outputting a signal corresponding to a torque-induced magnetic flux emanating from the magnetically polarized region.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.