Railcar truck roller bearing adapter pad systems

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;
• and
• first and second vertical shoulders that project upwardly from opposite lateral edges of the top surface;
• 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, 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;
• and
• an elastomeric member disposed between the top and bottom plate;
• wherein the first and second laterally projecting flanges of the top plate and the bottom plate are entirely disposed above the vertical shoulders of the roller bearing adapter.

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;
• and
• 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;
• and
• 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.

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 top surface;
• and
• 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 top plate;
• a bottom plate;
• and
• an elastomeric member disposed between the top and bottom plate;
• wherein the combined top plate, bottom plate, and elastomeric member provide a longitudinal stiffness of at least 45,000 pounds per inch through a longitudinal displacement of the top plate relative to the bottom plate of up to 0.139 inches from a central position, a lateral stiffness of at least 45,000 pounds per inch through a lateral displacement of the top plate relative to the bottom plate of up to 0.234 inches from the central position, and a rotational stiffness of at least 250,000 pound*inches per radian of rotation through a rotational displacement of the top plate relative to the bottom plate of up to 41 milliradians from the central position when a vertical load of 35,000 pounds is applied to the central portions of the adapter pad.