Speed-changing control mechanism of multistage speed-changing wheel hub
US6387008B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 1999 |
| Grant date | May 14, 2002 |
| Priority date | — |
| Expiry date | Sep 13, 2019 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2200/2005
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A speed-changing control mechanism of a multistage speed-changing wheel hub has a planetary gear device comprising a gear support and a plurality of planetary gears. The planetary gears are respectively engaged with a ring gear and sun gears. The rotational power of a drive member is transmitted to the ring gear or the gear support via a sleeve. A speed ratio change is brought about by the action of the planetary gears and the sun gears. The power is finally transmitted to the wheel hub via the gear support or the ring gear. The planetary gears are driven by the power input source portion of the sleeve in conjunction with the action of another sleeve on the fastening shaft, thereby controlling two sets of one-way ratchet pawls opposite in direction to engage or disengage. As a result, the input of the power source and degrees of freedom of the sun gears can be controlled by the use of the control slot, thereby preventing the interference between the retaining slot and the control key and eliminating the complicated power shifting mechanism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.