Modular power transfer unit assembly for a vehicle

摘要

A power transfer unit assembly for transferring torque from a differential carrier to a propeller shaft includes an input shaft configured to be rotatably driven by the transmission differential carrier about a first axis of rotation of the differential carrier. A first bevel gear is engaged with a second bevel gear. The first bevel gear is annular and concentrically surrounds the input shaft. The second bevel gear is configured to rotatably drive the propeller shaft about a second axis of rotation of the propeller shaft that is substantially perpendicular to the first axis of rotation. The power transfer unit assembly has a compound planetary gear set concentric with the first axis of rotation. The compound planetary gear set is configured to transfer torque from the input shaft to the first bevel gear at a reduction ratio. Modular power transfer unit assemblies having common components are disclosed.

主权项

1. A power transfer unit assembly for transferring torque from a differential carrier of a front differential to a propeller shaft of a vehicle; wherein the differential carrier rotates about a first axis of rotation and the propeller shaft rotates about a second axis of rotation substantially perpendicular to the first axis of rotation, the power transfer unit assembly comprising:
an input shaft configured to be rotatably driven by and rotatably fixed to the differential carrier to rotate at the same speed as the differential carrier about the first axis of rotation; a first bevel gear; a second bevel gear engaged with the first bevel gear; wherein the first bevel gear is annular and concentrically surrounds the input shaft; wherein the second bevel gear is configured to rotatably drive the propeller shaft about the second axis of rotation; and a compound planetary gear set concentric with the first axis of rotation and configured to transfer torque from the input shaft to the first bevel gear so that torque of the first bevel gear is less than torque of the input shaft and speed of the first bevel gear is greater than speed of the input shaft.