Page 12 - KNORR Pneumatic Disc Brake

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Description and Function

3.2 Description of Operation
(Floating caliper principle)

Brake Actuation Brake Adjustment
During actuation, the push rod of the actuator (18) moves To ensure a constant running clearance between pads and
the lever (19). The input forces are transferred via the disc, the brake is equipped with a non-wearing, automatic
eccentric roller bearing (20) to the bridge (17). The force is adjuster mechanism. The adjuster (23) operates with every
then distributed by the bridge (17) and the two threaded cycle of actuation due to the mechanical connection with
tubes (16) to the tappet and boot assemblies (13) and lever (19).
finally to the inboard pad (12 ).
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As the pads and disc wear, the running clearance increases.
The adjuster (23) and turning device (24) turn the threaded
After overcoming the running clearance between the tubes (16) by an amount necessary to compensate for this
pads and the disc, the reaction forces are transmitted by wear.
the caliper to the outboard pad (12 ). The clamping forces The total running clearance (sum of clearance both sides
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on the pads and the disc (46) generate the braking force of disc) should be between 0 6 mm and 1 1 mm; smaller
for the wheel. clearances may lead to overheating problems.

Brake Release
After releasing the air pressure, the return spring (27)
pushes the bridge (17) with the threaded tubes and lever
(19) back to the start position.

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