Electronic shift on the fly part-time electro mechanical transfer case

摘要

A number of variations may include a transfer case comprising an input shaft and a first output shaft sharing a primary axis of rotation; a second output shaft offset from the first output shaft; a range shifter comprising a first cam constructed and arranged to selectively shift a vehicle to a high-range drive mode, a low range drive mode, or a neutral drive mode; a mode shifter comprising a second cam constructed and arranged to actuate a synchronizer which selectively shifts the vehicle between a two-wheel drive mode and a four-wheel drive mode a gear train having a first axis offset from the primary axis, and a reversible electric motor which drives the gear train wherein direction of the rotation of the electric motor determines engagement or disengagement of the mode shifter to selectively shift the vehicle between the two-wheel drive mode and the four-wheel drive mode.

主权项

1. A transfer case comprising:
an input shaft having a primary axis of rotation; a first output shaft which is concentric with the input shaft; a second output shaft radially offset from the first output shaft; a range shifter comprising a first cam rotatable about the primary axis constructed and arranged to selectively shift a vehicle to a high-range drive mode, a low range drive mode, or a neutral drive mode; a mode shifter comprising a second cam rotatable about the primary axis constructed and arranged to actuate a synchronizer which selectively shifts the vehicle between a two-wheel drive mode and a four-wheel drive mode; a dual drive gear interposed between the range shifter and the mode shifter, wherein a first side of the dual drive gear includes an actuating tab constructed and arranged to actuate the first cam and wherein the second cam is attached to a second side of the dual drive gear so that the mode shifter is activated by rotation of the dual drive gear; a gear train operatively connected to the dual drive gear to drive the dual gear drive, wherein the gear train has a first axis offset from the primary axis; and a reversible electric motor which drives the gear train, wherein direction of the rotation of the electric motor determines engagement or disengagement of the mode shifter to selectively shift the vehicle between the two-wheel drive mode and the four-wheel drive mode.