TM 5-3895-382-24
The holdout ring is now turned by the spider key at the speed
of the ring gear. The tooth of the holdout ring is in a position
so they can not engage the notches in the center cam. The
driven clutch and cam moves around the holdout ring at a
speed faster than the ring gear. The holdout ring keeps the
driven clutch and cam from engaging with the center cam and
spider. The driven clutch, cam, drive axle, and wheel now turn
freely.
On the opposite side of the spider, driven clutch (7) and side
gear (8) are fully engaged with the spider. The teeth of the
spider send the drive force to this engaged driven clutch and
side gear. This provides the driving force of the machine to the
inside wheel.
When the turn is finished, the speed of the disengaged wheel
slows to nearly the speed of the ring gear. The resistance of
the ground to the wheel causes the torque on this wheel to be
in a small reverse direction. This causes the driven clutch and
cam to turn in a direction opposite the direction of the ring
gear.
The friction between the holdout ring and the driven clutch
causes the holdout ring to move in a direction opposite the
direction of the ring gear. The notch in the holdout ring moves
away from the spider key. When the teeth of the holdout ring
are in a position to engage the notches in the center cam, the
force of the spring pushes the driven clutch and cam to the
inside. The driven clutch pushes the holdout ring.
The holdout ring now engages the center cam and is turned at
the speed of the ring gear. The teeth of cam (17) now engage
the center cam and the teeth of the drive clutch engage the
spider. At this time, both wheels are turned at the same
speed.
Wheel Planetaries
Wheel planetaries.
(1) Spider. (2) Ring gear. (3) Hub assembly. (4) Planet pins.
(5) Planet spur gear. (6) Sun gear.
The wheel planetaries are a reduction of the spur gearing built
into the wheel hubs. The spur teeth of sun gear (6), which
floats, mesh with teeth of planet spur gears (5). The planet
spur gears rotate on planet pins (4) which are mounted in
spider (1). The planet spur gear teeth in turn mesh with teeth
of the floating ring gear (2).
Power is transmitted by the carrier to the axle shafts and the
sun gear of the planetary reduction, through the revolving
planet gears, and into the spider which drives wheel hub
assembly (3).
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