The Cyclo speed reducing system is based on an ingeniously
simple principle that offers many benefits. The speed reducer has only three
major moving parts:
High speed input shaft with an integral eccentric cam and roller bearing
assembly
Cycloid disc
Slow speed output shaft assembly
As the input shaft and eccentric cam rotate, it rolls the
cycloid discs around the internal circumference of the stationary ring gear.
The resulting action is similar to that of a wheel rolling around the inside
of a ring. As the cycloid disc travels in a clockwise path around the ring,
the wheel itself turns slowly on its own axis in the opposite (counter clockwise)
direction. Because of the curved, cycloidal profile of the cycloid disc, it
progressively engages with the rollers of the ring gear housing to produce a
reverse rotation at reduced speed. For each complete revolution of the high
speed shaft, the cycloid disc turns one cycloidal "tooth" in the opposite
direction. The reduced rotation of the cycloid disc is transmitted to the slow
speed output shaft to provide - speed reduction.
Why it's Better
The smooth, progressive rolling action of the cycloidal
disc speed reduction mechanism eliminates friction and the pressure points of
conventional gears. All of the Cyclo's torque transmitting components roll,
and are symmetrically placed around the shafts for perfectly balanced, smooth,
vibration free and quiet operation. Because the components are in compression,
they cannot shear off like traditional gear teeth.
Additionally, Sumitomo uses high-hardness, bearing grade
steel for all ratio-sensitive components. These exceptionally high, inherent
material specifications ensure long-life and reliable operation.
