Electric traction drives
US8393989B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 21, 2008 |
| Grant date | Mar 12, 2013 |
| Priority date | — |
| Expiry date | Feb 1, 2030 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60Y2400/73
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
Inventive embodiments are directed to components, subassemblies, systems, and/or methods for electric traction drives employing a continuously variable transmission (CVT) having a variator provided with a plurality of tilting traction planets and opposing traction rings. In one embodiment, an electric traction drive is provided with an electromotive device configured to transfer power to or from a traction sun of a CVT, In other embodiments, an electric traction drive is provided with an electromotive device that couples to certain components of a CVT such as a traction ring, a carrier assembly, and a main axle. Various inventive shifting assemblies having shift cams and shift cam cages can be used to facilitate adjusting the transmission speed ratio of a CVT. Various related devices include embodiments of, for example, a power input apparatus, a speed ratio shifter, a shift cam actuator, a shift nut, and a carrier assembly configured to support the tilting traction planets.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.