Planetary gear mechanism on an automatic transmission
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United States of America Patent
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-
Jan 9, 1990
Grant Date -
N/A
app pub date -
Mar 1, 1988
filing date -
Jul 8, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In a dual planetary gear of an automatic transmission, tooth surface pressure generated at a relatively short pinion is decreased and distributed since the pinion is formed as a pair of pinions. These pinions can be pinions which mesh with a sun gear or pinions which mesh with a ring gear and a single first pinion. Torque exerted on the ring gear (or the sun gear) is transmitted to the sun gear (or the ring gear) through one point of contact (or two) between the sun gear and one pinion (or a pair of pinions) and the ring gear and two points of contact (or one) between a pair of pinions (or one pinion) and the ring gear.
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