6
CF65/75/85 series
Description of components
OPERATION OF BRAKE COMPONENTS
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Basic brake stroke
The basic brake stroke is determined by the
notch in control plate 14, which is attached to
the axle housing. In the rest position, the rack
should rest against the upper edge of the notch.
When the stroke exceeds angle A, the adjusting
system is activated. Angle A corresponds to the
normal stroke.
Additional stroke
If the normal stroke is exceeded, the lower edge
of the notch of the control plate forces rack 10
upwards. As a result, pinion 3 is turned.
An overrunning clutch, consisting of spring 4
and conical clutch 5, has been fitted between
the pinion and worm shaft 6, which permits free
turning in this direction.
During the return stroke, the rack is pulled
downwards by the upper edge of the notch. The
pinion now turns in the opposite direction, so
that the overrunning clutch drives worm shaft 6
and the brake is adjusted.
Elastic stroke
During the elastic part of the stroke, the
considerable force transmitted pushes worm
shaft 6 axially against spring 12. This will cause
the worm shaft to become disengaged from the
conical clutch.
As a result, the conical clutch will be able to turn
freely over a certain distance during the return
travel, until clutch and worm shaft are
re-engaged, without driving the worm shaft.
From that moment, any rotation of the pinion will
once again adjust the length of stroke. As a
result of this construction, the elasticity of the
component involved will not be instrumental in
adjusting the stroke.
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