Transfer case with inter-axle dual-planetary differential

Patent · Tue Jul 07 04:00:00 EDT 1987

OSTI ID:6294386

Eastman, R E; Williams, R C

A transfer case apparatus is described adapted for driving a four wheel drive motor vehicle having front and rear ground engaging wheels. The apparatus includes a housing, an input shaft adapted for connection to a transmission of the motor vehicle, a pair of first and second output shafts supported for rotation in the housing, the first output shaft adapted for driving connection to the rear ground engaging wheels and the second output shaft adapted for driving connection to the front ground engaging wheels. A dual helical planetary differential gear assembly is arranged in a compact manner for proportioning torque between the first and second output shafts. The dual planetary differential helical gear assembly comprises a dual planetary carrier including first and second longitudinally spaced carrier rings rotatable about the central axis of the first output shaft. The first carrier ring has a central opening formed with internal splines concentrically disposed about the first output shaft. First and second juxtaposed toothed helical gun gears are concentrically disposed about the first output shaft. The first sun gear is fixed to the first output shaft and has its teeth at a first uniform radius. The second sun gear is journalled on the first output shaft and has its teeth at a second uniform radius a predetermined distance less than the first sun gear teeth radius.

• Assignee: Chrysler Motors Corp., Highland Park, MI
• Patent Number(s): US 4677873
• OSTI ID: 6294386
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
330602* -- Vehicle Design Factors-- Engine-Transmission Matching
DESIGN
GEARS
MACHINE PARTS
MECHANICAL TRANSMISSIONS
MOTION
OPERATION
ROTATION
SHAFTS
TORQUE
VEHICLES
WHEELS