Power transmission device for four wheel drive vehicle having an improved differential motion limiting mechanism
US4790211A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 31, 1986 |
| Grant date | Dec 13, 1988 |
| Priority date | — |
| Expiry date | Dec 31, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K17/3462
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A power transmission device for a full-time four wheel drive vehicle has a differential motion limiting device composed of a hydraulic frictional clutch such as a wet multiple disc type clutch. The friction clutch is disposed between a diff-carrier constituting a front wheel differential gear and a ring gear mount casing covering the diff-carrier and arranged coaxially with the diff-carrier. The ring gear mount casing is associated with the diff-carrier in a center differential gear, and the diff-carrier of the front wheel differential gear is associated with the left hand side gear in the center differential gear. Thus, when the friction clutch is engaged, the ring gear mount casing and the diff-carrier of the front wheel differential gear are integrally coupled with each other so that the rotation of the ring gear is transmitted directly to the front wheel differential gear, while the two elements in the center differential gear are integrally coupled with each other to lock the center differential gear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.