Gearing for power sharing in planetary transmission
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United States of America Patent
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-
Jan 15, 2002
Issued Date -
N/A
app pub date -
Oct 25, 2000
filing date -
Jul 16, 1999
priority date (Note) -
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Abstract
A planetary gear transmission has two or more planetary gear sets in the gear train. Each planetary gear set comprises a sun gear mounted on a sun shaft with the sun gear engaging a plurality of planet gears mounted on a planet gear carrier with the plurality of planet gears engaging a ring gear mounted on the transmission housing. Each gear of the planetary gear transmission is a helical cut gear. Sun gears and/or ring gears are mounted for axial movement with respect to the transmission. Thrust imbalances on the sun gears and/or ring gears resulting from uneven loading and the helical cut result in sun gears and/or ring gears moving in the axial direction to eliminate the thrust imbalances and thereby resulting in equal loading or power sharing amongst the planetary gear sets.
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