Electric power tool
US8961358B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | May 15, 2012 |
| Grant date | Feb 24, 2015 |
| Priority date | — |
| Expiry date | Jan 12, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB25F5/001
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An electric power tool includes a housing, a motor disposed in the housing, a planetary gear reduction mechanism and an internal gear. The planetary gear reduction mechanism includes multi-stage planetary gears, multi-stage carriers each configured to carry a plurality of planetary gears, and a bearing assembled with a final-stage carrier from a rear side of the final-stage carrier to rotatably support the final-stage carrier. The internal gear is configured to be rotatable and axially slidable while allowing planetary motion of final-stage planetary gears supported by the final-stage carrier. A gear portion provided on the final-stage carrier is formed as a separate gear which is assembled with the final-stage carrier from the rear side of the final-stage carrier after assembling the bearing with the final-stage carrier.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.