Differential gear
US4813297A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1987 |
| Grant date | Mar 21, 1989 |
| Priority date | — |
| Expiry date | May 26, 2007 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2048/364
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A differential gear includes a rotatable case, pinions rotatably disposed in the case, a pair of side gears meshing with the pinions and disposed in the case, a first shaft supported rotatably about a rotary axis of the case and extending from one of side gears, a second shaft supported rotatably about the axis and extending from the other side gear in the opposite direction to the first shaft, a first driven gear provided in one of the first and second shafts, a first drive gear for rotating the driven gear to transmit driving force to the first and second shafts. A worm wheel fixed to the case, a worm meshing with the worm wheel and an electric motor are provided. The motor is controlled by a control device so as to maintain the difference between numbers of revolutions of the first and second shafts within a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.