BigPatents India

A transfer case (16) for a vehicle (10) that includes a planetary gear assembly (100), a clutch pack assembly (110), and a band and drum assembly (98) that provide an overdrive or underdrive and direct drive in combination with a vehicle transmission (14). In one embodiment, an input shaft (18) drives an outer ring gear (108) of the planetary gear assembly (100) and is coupled to one set of discs (112) of the clutch assembly (110). A carrier (106) of the planetary gear assembly (100) is coupled to a rear output shaft (30), where the carrier (106) supports a plurality of pinion gears (104). A sun gear (102) of the planetary sear assembly (100) is coupled to another set of discs (114) of the clutch assembly (110) that are coupled to the drum (118). When the clutch assembly (110) is engaged, the ring gear (108) is coupled to the sun gear (102) for direct drive and when the band (116) is engaged, the pinion gears (104) and the ring gear (108) provide underdrive. (FIG. 2)