Planetary gear arrangement with a lubrication control structure

摘要

A planetary gear arrangement has one or more planetary gear sets each having a carrier assembly in which a plurality of pinion gears are rotatably mounted on pins supported in a carrier housing. An annular lube dam is attached to the carrier housing and includes a first and second annular sidewall portions extending radially inward and joined by an axial wall portion. The radially innermost sidewall portion directs lubrication fluid to the support pins for delivery to the pinion gears. The axial wall engages notched portions on the pins to ensure the angular orientation of the lube passages formed in the pins. The outermost annular wall portion provides a thrust washer bearing surface between the carrier assembly and an adjacent transmission component to support relative rotation therebetween.