Epicyclic gear system with flexpins and helical gearing
US8376902B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2009 |
| Grant date | Feb 19, 2013 |
| Priority date | — |
| Expiry date | Mar 30, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E10/72
- WIPO fieldEngines, pumps, turbines
- WIPO sectorMechanical engineering
Abstract
An epicyclic gear system (A) includes helical sun and ring gears (2, 4) and helical planet pinions (6) located between and engaged with the sun and ring gears. The gear system also includes a carrier (8) having an end wall (12) and flexpins (20) cantilevered from the end wall and extended into the planet pinions. Each flexpin at its end remote from the end wall carries a sleeve (22) that extends back over the flexpin where it is spaced from the flexpin. The planet pinion for the flexpin rotates around the sleeve on a bearing (24). The arrangement is such that the flexpin will flex adjacent to the carrier end wall circumferentially along the pitch circle of the carrier in one direction and circumferentially in the opposite direction adjacent to attachment of the sleeve. But the helical gear imparts a couple to the planet pinion that seeks to tilt the sleeve radially toward or away from the main axis of the system. A deflection inhibitor (I) lies between each flexpin and the sleeve surrounding it to prevent the radial deflection.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.