Planetary gear unit
US8425374B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 29, 2010 |
| Grant date | Apr 23, 2013 |
| Priority date | — |
| Expiry date | Dec 7, 2031 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2001/289
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A planetary gear unit includes a planet carrier having a backplate and being provided with planet shafts distributed uniformly around the planet carrier's axis and extending through bores in the backplate, each planet shaft rotatably supporting a pair of planet gears by planet bearings, the planet gears being mounted between a ring gear and a sun gear for mutual interaction. The planetary gear unit further includes a key provided in a keyway of the planet shaft and extending to the backplate for preventing the at least one planet shaft from rotating around its own axis. The key and keyway are provided at a location positioned between 45° and 270° in a clockwise direction around the circumference of the planet shaft, with 0° being defined as a point at the planet shaft circumference corresponding with the largest distance from the centre of the back plate seen from the rotor side onwards.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.