Power transfer device for four-wheel drive vehicles
This patent describes a power transfer device for four-wheel drive vehicles, comprising: a housing an input shaft rotatably mounted within the housing for drive connection to an output shaft of a power transmission; a first output shaft rotatably mounted within the housing in a coaxial relationship with the input shaft; a second output shaft rotatably within the housing in a concentric relationship with the input shaft; and a planetary gear unit including a sun gear, a carrier, a ring gear, and planet gears journaled on the carrier and in mesh with the sun and ring gears and being axially slidably mounted on the input and output shafts, wherein the planetary gear unit is shiftable between first, second and third positions to establish a high speed drive mode in the first position wherein the carrier is engaged with the input shaft, and the sun and ring gears are each engaged with the output shafts to permit differential action between the output shafts. The planetary gear unit being arranged to establish a high speed drive mode in the second position wherein the carrier is engaged with the input shaft and the first output shaft, and the sun gear is engaged with the input shaft and the second output shaft to restrict the differential action between the output shafts and being further arranged to establish a low speed drive mode in the third position wherein the sun gear is engaged with the input shaft, the carrier is engaged with the output shafts, and the ring gear is locked by engagement with the housing to restrict the differential action between the output shafts.
- Assignee:
- Toyota Jidosha Kabushiki Kaisha, Aichi
- Patent Number(s):
- US 4774854
- OSTI ID:
- 6629201
- Resource Relation:
- Patent File Date: Filed date 8 Apr 1987
- Country of Publication:
- United States
- Language:
- English
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