10-11
SK714-5 SK815-5 SK815-5 turbo
3.
REDUCTION GEARING
Function
This final drive motor is equipped with a one-stage epicycloidal reduction gear that converts the high rotation speed and
low torque of the hydraulic motor into low speed and high torque at the swing pinion.
Operating principle
The rotary movement of the output shaft of the motor is transmitted to the gear (s1) and hence to the bevel gears (b1) whi-
ch are integrated with the planetary gear (1).
Since the gear (a1) is fixed with respect to the output shaft of the hydraulic motor, the planetary gear is obliged to turn, mo-
ving with it the output shaft (2) of the reduction gearing (connected to the planetary gear by means of grooved toothing).
The reduction ratio of the rotation speed is described by the formula:
R= Zs1/(Zs1+Za1)
Zs1= number of sun gear teeth
Za1= number of ring gear teeth
RKS01080
2
a
1
s
1
b
1
1
STRUCTURE AND FUNCTION
FINAL DRIVE
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