| 摘要 |
<p>A drive transfer gear assembly for a four-wheel drive truck tractor. The tractor includes a front drive steer axle assembly, a rear drive axle assembly containing the drive transfer gear assembly, and a prime mover drivingly connected to the front and rear drive mechanisms by the drive transfer gear assembly. The front axle assembly includes a rigid axle housing having end sections and a drop center section containing a differential gear set with output gears drivingly connected to wheels pivotally journaled at the outboard ends of the rigid axle housing. The rear axle assembly includes a differential gear set with output gears drivingly connected to the rear wheels, and a drive transfer gear assembly positioned forwardly of the differential gear set. The drive transfer gear assembly includes a torque proportioning planetary gear set, an angled tooth clutch for locking the planetary gear set in response to front wheel spinout, a manual clutch for preventing differentiation of the gears in the planetary gear set, and a torque limiting clutch for preventing overtorque to the front wheel drive mechanism.</p> |
