| 摘要 |
The present invention relates to a differential gear assembly including a rotatable case having an annular gear formed therein with first and second axle shafts journalled in the case for rotation relative thereto. A sun gear is connected to the first axle shaft for rotation therewith, and a planetary carrier is connected to the second axle shaft for rotation therewith. A plurality of pairs of planetary gears is supported on the carrier, with a first gear of each of the pairs meshing with the annular gear and a second of each of the pairs meshing with the sun gear. Clutch means are provided for limiting relative rotation between the first axle shaft and the second axle shaft by clutching the sun gear to the planetary carrier, the clutch means including a clutch pack formed of a plurality of annular clutch disks. The assembly also incorporates means for selectively compressing the clutch pack, including an actuator plate spaced by an air gap an effective distance from an electromagnet disposed between the actuator plate and the clutch pack. A pressure plate is disposed adjacent the clutch pack, the pressure plate being connected to the actuator plate by means of a plurality of legs. Upon actuation of the electromagnet, the actuator plate is drawn towards the electromagnet, moving the plurality of legs axially and urging the pressure plate against the clutch pack.
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