| 摘要 |
<p>A power transfer device for a four-wheel drive vehicle comprises a first differential (20a) including a differential case (22) arranged to be applied with drive torque from a transmission, a pinion gear (23a) rotatably mounted within the differential case, and a pair of side gears (24a, 24b) rotatably mounted within the differential case and in mesh with the pinion gear; a pair of output shafts (17a, 17b) connected to the side gears respectively for driving the front and rear road wheels; a second differential (20b) including a differential carrier (21) formed to contain the differential case therein, a carrier (26) rotatably mounted within the differential carrier and connected with the differential case for rotation therewith about a common axis, a sun gear (28) integral with one of the side gears, a planetary gear (27a) rotatably supported by the carrier and in mesh with the sun gear, a ring gear (25) integral with the inner wall of the differential carrier and in mesh with the planetary gear, the carrier being drivingly connected to an output shaft of the transmission; and a selector mechanism (20c) arranged to drivingly connect one of the output shafts or the differential carrier to the front or rear road wheels.</p> |
