Air disc brake system drag reduction guide pin and methods for the use and assembly thereof
AssigneeBendix Commercial Vehicle Systems LLC
InventorsErik W. Oberdorfer, Alan Backstrom
Life of this patent
Estimating the term…
Abstract
An air disc brake system includes a carrier having a mounting feature and a guide pin having a longitudinally extending relief passage. A caliper includes a longitudinally extending bore having spaced apart first and second ends, wherein the guide pin is received in the bore, and wherein the caliper is slidably mounted on the guide pin with the relief passage in fluid communication with the first and second ends of the bore. A fastener couples the guide pin to the carrier. A cap is coupled to the caliper and closes a second end of the bore. Methods of using and assembling the air disc brake system are also provided.
Claims24
An air disc brake system comprising:
- a carrier having a mounting feature;
- a guide pin comprising longitudinally spaced first and second ends, an outer bearing surface comprising longitudinally spaced first and second ends, and an interior through hole extending between and open at the first and second ends of the guide pin, wherein the guide pin comprises a relief passage on an outside surface of the guide pin;
- a caliper comprising a longitudinally extending bore having spaced apart first and second ends, wherein the guide pin is received in the bore, and wherein the caliper is slidably mounted on the guide pin with the relief passage in fluid communication with the first and second ends of the bore;
- and
- a fastener disposed in the through hole and comprising a first end engaged with the mounting feature and a second end engaged with the guide pin;
- and
- a cap coupled to the caliper and closing a second end of the bore;
- wherein the relief passage comprises a first passage communicating between the outer bearing surface and the through hole;
- wherein the guide pin comprises a face engaged by the second end of the fastener;
- wherein the relief passage further comprises a second passage communicating between the through hole and the face;
- and
- wherein the relief passage further comprises a clearance between the fastener and the through hole, wherein the clearance communicates between the first and second passages.
A method of assembling an air disc brake system comprising:
- inserting a guide pin into a bore of a caliper, wherein the bore has first and second ends, wherein the guide pin comprises an outer bearing surface, and an interior through hole extending between and open at first and second ends of the guide pin, wherein the guide pin comprises a relief passage on an outside surface of the guide pin and in fluid communication with the first and second ends of the bore;
- inserting a fastener into the through hole and engaging a mounting feature of a carrier;
- and
- installing a cap on the caliper and closing the second end of the bore;
- wherein the outer bearing surface is cylindrical;
- wherein the relief passage comprises a channel extending radially inwardly from the outer bearing surface;
- and
- wherein the relief passage comprises a flat, wherein the guide pin has a major segment cross section.
A guide pin for use in an air brake system comprising:
- longitudinally spaced first and second ends;
- an outer bearing surface comprising longitudinally spaced first and second ends;
- an interior through hole extending between and open at the first and second ends of the guide pin;
- and
- a relief passage in fluid communication with the first end of the outer bearing surface and the second end of the guide pin, wherein the relief passage comprises a flat, wherein the guide pin has a major segment cross section taken orthogonal to a longitudinal axis of the guide pin.
Dependencies are inferred from the claim text.