Planetary gear transmission systems or components – Differential planetary gearing – Planet pinion is worm gear
Patent
1991-04-24
1992-04-28
Diehl, Dwight
Planetary gear transmission systems or components
Differential planetary gearing
Planet pinion is worm gear
475251, 475252, F16H 142
Patent
active
051083531
ABSTRACT:
A gear differential includes planetary gear sets made up of two side gears (26, 28) mounted for rotation about a common axis (24) and pairs of element gears (36, 38) mounted for rotation about respective parallel axes (48, 50) that are both offset and inclined through acute shaft angles (L.sub.1, L.sub.2) with respect to the common side gear axis (24). The two element gears (36, 38) have first gear portions (52, 54) that mesh with respective side gears (26, 28) and second gear portions (56, 58) that mesh with each other. The side gears (26, 28) have respective helix angles (A.sub.1, A.sub.2) that are substantially equal in absolute magnitude but opposite in hand. However, lead angles of the side gears (26, 28), as the complements of their respective helix angles (A.sub.1, A.sub.2), are larger than the shaft angles to provide opposite directions of relative rotation between the side gears.
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Brewer Mark S.
Dye James S.
Diehl Dwight
Zexel-Gleason U.S.A., Inc.
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