Stacked planetary gear assembly with improved lubrication

A stacked planetary gear assembly having improved lubricant flow, comprising, in combination,

• a shaft having an axial lubrication passage communicating with an outlet port,
• an inner planetary gear set including an inner sun gear on said shaft, an inner ring gear and an inner planet carrier having a plurality of inner planet gears meshing with said inner sun gear and said inner ring gear,
• an outer planetary gear set including outer sun gear teeth on said inner ring gear, an outer ring gear and an outer planet carrier having an outer plurality of planet gears meshing with said sun gear teeth and said outer ring gear,
• said outer planet carrier having a hub adapted to receive said shaft and a plurality of fluid passages extending through said hub and communicating with said outlet port of said shaft, and
• a lubrication guide having a plurality of channels extending from said plurality of fluid passages in said hub to said second plurality of planet gears.

A stacked planetary gear assembly having improved lubricant flow comprising, in combination,

• a shaft having an axial lubrication passage communicating with at least one outlet port,
• a first planetary gear set including a first sun gear disposed on said shaft, a first ring gear and a first planet carrier having a first plurality of planet gears meshing with said first sun gear and said first ring gear,
• a second planetary gear set including second sun gear teeth on said first ring gear, a second ring gear and a second planet carrier having a second plurality of planet gears disposed on anti-friction bearings and meshing with said second sun gear and said second ring gear,
• said second planet carrier having a hub adapted to receive said shaft and a plurality of fluid passages extending through said hub and communicating with said at least one outlet port, and
• a lubrication disc having a plurality of channels extending from said fluid passages in said hub to said anti-friction bearings.