Two speed high shift transmission

Planetary gear transmission systems or components – Fluid drive or control of planetary gearing – Fluid controlled mechanical clutch or brake

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Details

475142, 475269, 475330, 192 871, F16H 146, F16H 4708

Patent

active

054782902

ABSTRACT:
The present invention employs a hydraulically operable piston and intermediate member to control two clutches in a first planetary gear set. The first planetary gear set includes a first sun gear, a first planet gear, a first planet carrier and an inner ring gear. The first planet carrier includes a gear which drives a second planetary gear set resulting in rotation of a wheel hub. With hydraulic pressure applied to the piston and the intermediate member a first clutch is engaged locking an inner ring gear to a stationary outer ring effecting a high ratio reduction. With no hydraulic pressure applied to the piston and intermediate member a second clutch engages the first sun gear and the first planet carrier locking them together such that the first sun gear, first planet gear, first planet carrier and inner ring gear rotate in unison effecting a low ration reduction. With no hydraulic pressure applied, the first clutch is not engaged.

REFERENCES:
patent: 3131582 (1964-05-01), Kelbel
patent: 4181042 (1980-01-01), Rau et al.
patent: 4676356 (1987-06-01), Beccaris et al.
patent: 4741422 (1988-05-01), Fuehrer et al.
patent: 4957195 (1990-09-01), Kano et al.
patent: 5024636 (1991-06-01), Phebus et al.
patent: 5151068 (1992-09-01), Mann et al.
patent: 5203862 (1993-04-01), Nishida et al.
patent: 5358458 (1994-10-01), Hicks

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