Large-ratio speed changing apparatus
US8979697B2 · kind B2 · utility
Inventor
Key dates
| Filing date | Nov 4, 2011 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Nov 14, 2032 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2001/324
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A speed changing apparatus for changing an input speed to an output either greatly slower or faster, the apparatus has a coaxial pair of ring gears that includes a large ring gear having a pitch diameter A and a small ring gear having a pitch diameter D. A coaxial pair of spur gears includes a large spur gear having a pitch diameter B and a small spur gear having a pitch diameter C. The large spur gear meshes with the large ring gear and the small spur gear meshes with the small ring. A carrier member is connected to one of the input and output shafts of the apparatus. Two gears of one of the two coaxial pairs being fixed together to operate epicyclically on the carrier. One gear of the other of the two coaxial pairs being fixed to the frame of the apparatus and the other gear being connected to the other of the input and output shafts. In the apparatus, the four gears satisfy the dimensional relationship of A=K+i, B=K, C=K−j and D=K+i−j.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.