Four-wheel drive device

Details Four-wheel drive device Four-wheel drive device

1990-10-17

1991-10-29

Wright, Dirk

Planetary gear transmission systems or components

Differential planetary gearing

Spur gear differential

F16H 142, F16H 146

Patent

active

050612298

ABSTRACT:
A transfer portion connected to the output shaft of a transmission portion has a front planetary gear unit the output element of which is connected to the front wheels and a rear planetary gear unit the output element of which is connected to the rear wheels, the two units being connected to each other by a common element. The output shaft of the transmission portion is directly connected to the input element of either of the planetary gear units, while the same is connected to the input element of the other planetary gear unit via a clutch C.sub.3. Furthermore, the input element of the other planetary gear unit is connected to the case via a brake B.sub.4. Therefore, the reduction function can be realized in cooperation with the two planetary gear units. As a result, the four-wheel drive device is lightened. Furthermore, since the differential gear device is constituted by the planetary gear unit, a compact and light four-wheel drive device can be provided and the neutral state can be created by completely freeing the front and the rear wheels.

REFERENCES:
patent: 4458557 (1984-07-01), Hayakawa
patent: 4713988 (1987-12-01), Harada et al.
patent: 4756209 (1988-07-01), Hamada et al.
patent: 4768399 (1988-09-01), Kubo et al.
patent: 4819506 (1989-04-01), Matsumoto

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