Differential gear for a two wheel or four wheel drive vehicle
US4819512A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 1987 |
| Grant date | Apr 11, 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 two rotatable cases, pinions disposed rotatably in each of the cases, first and second side gears meshing with the pinions and disposed rotatably in each of the cases, a first shaft supported rotatably about a co-axis of the cases and extending from the second side gear in the first case to the first side gear in the second case, a second shaft supported rotatably about the co-axis and extending from the first side gear in the first case, a third shaft supported rotatably about the co-axis and extending from the second side gear in the second case, a driven gear provided in the first shaft and a first drive gear for rotating the driven gear to give driving force to the shafts. First and second worm wheels respectively fixed to the first and second cases, first and second worms respectively meshing with the first and second worm wheels and at least one electric motor for rotating the first and second worms are provided. The motor is controlled by a control device so as to maintain the difference between the number of revolutions of the second and third shafts within a predetermined range.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.