Four-wheel vehicle drive system

Details Four-wheel vehicle drive system Four-wheel vehicle drive system

1985-11-05

1987-02-24

Herrmann, Allan D.

Motor vehicles

Having four wheels driven

With differential means for driving two wheel sets at...

74701, 74713, B60K 1734

Patent

active

046450297

ABSTRACT:
The present invention relates to a transaxle mechanism for use in a four-wheel drive system of an automotive vehicle. The four-wheel vehicle drive system includes a central differential gear assembly, a front-wheel differential gear assembly, a ring gear and a bevel gear. The central differential gear assembly includes: a toothed wheel which engages with a transmission output gear of a power transmission gear unit; a central differential case fixed to the toothed wheel; a central pinion cross shaft fixed to the central differential case; central differential bevel pinions mounted rotatably on the central pinion cross shaft and central side bevel gears engaging with the central differential bevel pinion. The front-wheel differential gear assembly include; a front-wheel differential case fixed to one of the central side bevel gears; a front-wheel pinion cross shaft fixed to the front-wheel differential case; front-wheel differential bevel pinions mounted rotatably on the front wheel pinion cross shaft; front-wheel side bevel gears engaging with the front wheel differential bevel pinions and being secured to front wheel shafts. A second of the central side bevel gear has a hollow shaft portion within which one of the front shafts is inserted and a hub case is fixed to the hollow shaft portion of the second of central side bevel gear. The ring gear fixed to the hub case and the ring gear engages with the bevel gear which is connected to a propeller shaft. The ring gear is located apart from the central differential gear assembly and is located adjacent to the central longitudinal line of the vehicle.

REFERENCES:
patent: 4476952 (1984-10-01), Suzuki
patent: 4476953 (1984-10-01), Hiraiwa
patent: 4582160 (1986-04-01), Weismann et al.

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