Planetary gear transmission systems or components – Variable speed or direction transmission combined with... – Variable speed or direction is planetary transmission
Patent
1993-09-07
1995-03-14
Marmor, Charles A.
Planetary gear transmission systems or components
Variable speed or direction transmission combined with...
Variable speed or direction is planetary transmission
475290, 475291, 475318, 475321, F16H 2922
Patent
active
053972821
ABSTRACT:
A final drive for a multi-speed power transmission has freewheeler timed up and down forward power shifts utilizing two planetary gear sets connected between the transmission and differential. For low ratio a smaller diameter sun gear of a first gear set is driven through a freewheeler with the associated ring gear held for reaction so that the pinion carrier assembly drives the differential at a low ratio. For high ratio, a larger diameter sun gear of a second gear set is directly driven while a high-reverse clutch holds the associated ring gear for reaction. The pinion carrier assembly common to both gear sets drives the differential at a higher speed ratio as the freewheeler overruns on torque reversal. The ring gear of the second gear set of one embodiment has a path to ground through an additional freewheeler for coast control. The outer race of the low-ratio freewheeler has external teeth to park-lock the associated sun gear through a grounded parking pawl. Reverse drive from the transmission is established by apply of the high-reverse clutch for drive of the common carrier.
REFERENCES:
patent: 1259065 (1918-03-01), Anibal
patent: 2700311 (1955-01-01), Bade
patent: 4114478 (1978-09-01), Clauss
patent: 4223569 (1980-09-01), Koivunen
patent: 4412459 (1983-11-01), Goscenski, Jr.
patent: 4589304 (1986-05-01), Ashikawa et al.
patent: 4976670 (1990-12-01), Klemen
patent: 5046997 (1991-09-01), Koivunen
patent: 5133697 (1992-07-01), Hattori
Hydra-Matic 4T80-E Technician's Guide, 17001.19, p. 8.
Battista Mary Ann
Marmor Charles A.
White Charles R.
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