LUBRICATION IN A TRANSFER CASE WITHOUT A MECHANICAL PUMP

摘要

A transfer case is provided with a primary shaft which is selectively engagable with a secondary shaft via a clutch mechanism. The clutch mechanism is inclusive of a friction pack. A hub of the clutch mechanism is connected on the primary shaft and the clutch housing is torsionally fixed with a primary sprocket rotatively mounted on the primary shaft. A reservoir system is provided for delivering splashed oil axially along the primary shaft overlapping the friction pack. The reservoir system has a collective fluid receptacle that is connected via a stationary passage with a lubrication passage radially inward of the friction pack of the hub.

主权项

1. A vehicle transfer case comprising:
a housing; a primary shaft rotatably mounted within said housing; a secondary shaft selectively driven by said primary shaft, said secondary shaft being rotatably mounted by said housing; a hub torsionally fixed with said primary shaft; a clutch housing selectively torsionally connected with said hub via a friction pack; an engagement wheel torsionally fixed with respect to said clutch housing and torsionally connected with said secondary shaft; a friction pack engager to cause said clutch housing to be selectively connected with said hub; and a reservoir system fixed with respect to said housing for capturing lubricant energized by result of operation of at least one of said primary and secondary shafts, said reservoir system having a portion adjacent to said engagement wheel and said reservoir system channeling said lubricant in an axial direction overlapping said friction pack and delivering the lubricant to a collective fluid receptacle, and said reservoir system having a stationary passage formed in said housing for transporting lubricant from said reservoir system to said primary shaft radially inward of said friction pack.