Power transmission device for four wheel drive vehicle having an

Details Power transmission device for four wheel drive vehicle having an Power transmission device for four wheel drive vehicle having an

Filed on

1986-12-31

Date issued

1988-12-13

Examiner

Braun, Leslie A.

Patent Class

Machine element or mechanism

SubClass

Gearing

SubSubClass

Plural power paths to and/or from gearing

Other Related Categories

74711, 180247, F16H 3710

Type

Patent

Status

active

Patent number

047902116

Description

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.

REFERENCES:
patent: 3612237 (1971-10-01), Honda
patent: 3650364 (1972-03-01), Laing
patent: 3894446 (1975-07-01), Snoy et al.
patent: 3974717 (1976-08-01), Breed et al.
patent: 3999634 (1976-12-01), Howell
patent: 4012968 (1977-03-01), Kelbel
patent: 4520690 (1985-06-01), Dangel
patent: 4582160 (1986-04-01), Weismann et al.
patent: 4643045 (1987-02-01), Katayama

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