Patent ID: 6513615
Filing Date: 2003-02-04
Classification: B60K

Abstract:
A power take-off unit for a full-time four-wheel drive vehicle having a powertrain and front and rear drivelines, comprising:an input shaft adapted to be driven by the powertrain; and interaxle differential having a first sun gear driving a rear drive assembly, a second sun gear driving a front drive assembly, a first carrier driven by said input shaft, a set of first planet gears rotatably supported by said first carrier and meshed with said first sun gear, and a set of second planet gears rotatably supported by said first carrier and meshed with said second sun gear and said first planet gears; said front drive assembly including a final drive unit and a differential unit, said final drive unit having a third sun gear driven by said first sun gear, a first ring gear fixed to a stationary member, and a set of first pinion gears meshed with said first ring gear and said third sun gear and which are rotatably supported from a second carrier, said differential unit having a second ring gear driven by said second carrier, a fourth sun gear fixed to one of a pair of front axleshafts associated with the front driveline, a third carrier fixed to the other of said pair of front axleshafts, a set of second pinion gears rotatably supported from said third carrier and meshed with said second ring gear, and a set of third pinion gears rotatably supported from said third carrier and meshed with said fourth sun gear and said second pinion gears; and said rear drive assembly includes a first transfer gear driven by said second sun gear, a second transfer gear driving a first bevel gear, a third transfer gear meshed with said first and second transfer gears, a second bevel gear meshed with said first bevel gear, and an output shaft fixed to said second bevel gear and which is adapted for connection to the rear driveline.