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 system configured for use with a three-piece truck having AAR standard geometry comprising:
a roller bearing adapter configured to engage a roller bearing, the roller bearing adapter comprising:
a crowned top surface;a bottom surface configured to engage a roller bearing; an adapter pad engaged with the roller bearing adapter and configured to engage a side frame pedestal roof, the adapter pad comprising:
a continuous top plate having a central portion and first and second lateral edges;a continuous bottom plate having a central portion and first and second upturned regions projecting upwardly from opposite edges of the central portion;an elastomeric member disposed between the first lateral edge of the top plate and the first upturned region of the bottom plate, between the central sections of the top and bottom plates, and between the second lateral edge of the top plate and the second upturned region of the bottom plate; wherein a top surface of the top plate is raised above a top surface of the bottom plate.