Doosan DA40 - EXAMPLE 1: Dedendum tooth position; EXAMPLE 2: Dedendum tooth position

SHOP MANUAL
DRIVE LINE
Ch 3 page 140 Ch 3 page 141
DRIVE LINE
EXAMPLE 1: Dedendum tooth position
The contact pattern on the convex and concave flank is too
close to the root, although more than 50% of
the flank in h-direction is covered.
An adjustment is necessary!
Feature: On the convex flank the contact pattern is tan
gent to the toe, on the concave flank it
is tangent to the heel.
Adjustment: Install thinner pinion shim!!
The contact pattern is in the flank without bridging and a
minimum of 50% of the flank in h-direction is
covered.
The example shows a relatively small contact pattern. How-
ever, the contact pattern is tangent to the middle of tooth
and would cover the flank optimally in case of a higher load.
EXAMPLE 2: Dedendum tooth position
The contact pattern on the convex and concave flank is too close
to the top. The contact pattern is too
small and is not tangent to the middle of tooth.
An adjustment is necessary!
Adjustment: Use thicker pinion shim!
The convex contact pattern must be
tangent to the middle of tooth.
A minimum of 50% of the tooth depth (flank) is covered.
Figure 428
Figure 427
Figure 426
Figure 425