Epicyclic gear system

Details Epicyclic gear system Epicyclic gear system

2006-06-06

2006-06-06

Ho, Ha (Department: 3681)

Planetary gear transmission systems or components

Planetary gearing or element

Planet pinion supported by roller bearings

Reexamination Certificate

active

07056259

ABSTRACT:
An epicyclic gear system (A) has a sun gear (2), a ring gear (4) located around the sun gear, and planet gears (6) located between and engaged with sun and ring gears. In addition, it has a carrier (8) including a carrier flange (30) offset axial from the planet gears, carrier pins (34) projecting from the carrier flange into the planet gears, and bearings (72) between the planet gears and the carrier pins so that the planet gears rotate on the pins. Each bearing includes an inner race (46) having tapered raceways (56) presented away from the carrier pin, opposing tapered raceways (24) on the ring gear, and tapered rollers (70) organized rows between the raceways. Whereas the carrier pin is cantilevered from the carrier flange, the inner race is cantilevered from the carrier pin remote from the carrier flange, and this insures that the axes (Y) about which the planet gears rotate remain parallel to the central axis (X) of the system.

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