Railcar truck roller bearing adapter pad systems

摘要

A railcar truck and adapter pad system for placement between a roller bearing and side frame pedestal roof of a three-piece railcar truck. Many different features of the pad and/or the adapter-pad interface are configured to improve stiffness characteristics to satisfy both curving and high speed performance of the railcar truck.

主权项

1. A roller bearing adapter pad configured for use with a three-piece truck having AAR standard geometry the adapter pad configured to engage a side frame pedestal roof, the adapter pad comprising:
a continuous top plate having a central portion, first and second upturned regions projecting upwardly from opposite edges of the central portion, a first lateral flange projecting outwardly from the first upturned region, the first lateral flange having a first lateral edge, and a second lateral flange projecting outwardly from the second upturned region, the second lateral flange having a second lateral edge, the continuous top plate having first and second longitudinal edges; a continuous bottom plate having a central portion, first and second upturned regions projecting upwardly from opposite edges of the central portion, a first lateral flange projecting outwardly from the first upturned region, the first lateral flange having a first lateral edge, and a second lateral flange projecting outwardly from the second upturned region, the second lateral flange having a second lateral edge, the continuous bottom plate having first and second longitudinal edges; an elastomeric member disposed between the top and bottom plate; wherein the first lateral edge of the top plate and the second lateral edge of the top plate define a inward curving or inward angled edge from an outer surface of the top plate to an inner surface of the top plate in a side view, and wherein the first lateral edge of the bottom plate and the second lateral edge of the bottom plate define a inward curving or inward angled edge from an outer surface of the bottom plate to an inner surface of the bottom plate in a side view; wherein the first longitudinal edge of the top plate and the second longitudinal edge of the top plate define a inward curving or inward angled edge from an outer surface of the top plate to an inner surface of the top plate in a side view, and wherein the first longitudinal edge of the bottom plate and the second longitudinal edge of the bottom plate define a inward curving or inward angled edge from an outer surface of the bottom plate to an inner surface of the bottom plate in a side view; wherein the first lateral edge of the top plate and the second lateral edge of the top plate include curved portions from a top view, and wherein the first lateral edge of the bottom plate and the second lateral edge of the bottom plate include curved portions from a top view; wherein the elastomeric member extends laterally outward beyond the first and second lateral edges of the top and bottom plates; and wherein the elastomeric member extends longitudinally outward beyond the first and second longitudinal edges of the top and bottom plates.