Operating Description; Reduction Gear - Doosan DX140R Shop Manual

OPERATING DESCRIPTION

Reduction Gear

Function
This reduction gear unit is composed of two stage planetary
gear mechanism.
The reduction gear reduces the high speed of hydraulic motor
and converts it low-speed, high-torque rotation.
Operating Description
The rotation of hydraulic motor shaft is transmitted to sun gear
(4) of the first stage which is linked with shaft (102) in spline.
At that time, the hub (1) is rotated by the rotation of the planetary
gears (5).
The hub (1) rotation is transmitted to carrier (3) which connected
to planetary gears (5), and that causes sun gear (6) rotation of
the second stage.
The rotation of sun gear (6) is transmitted to the hub via three
planetary gears (7) of the second stage.
The generated rotation of reduction gear is output rotation.
Planetary gear (7) Planetary gear (5)
Sun gear (4)
Shaft (102)
output
input
Spindle (2)
Sun gear (6)
Carrier (3)
Hub (1)
FG009760
Figure 3
SP001346
Travel Moter
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