| 主权项 |
1. Method for forming a railcar truck comprising:
providing a three-piece truck comprising:
a bolster;a first side frame having a first pedestal of AAR standard geometry and a second pedestal of AAR standard geometry, and a second side frame having a third pedestal of AAR standard geometry and a fourth pedestal of AAR standard geometry, each side frame pedestal defining a first outer side and a second outer side and having a pedestal roof located and extending between the first outer side and the second outer side; providing a first wheelset engaged with a first roller bearing and engaged with a second roller bearing; providing a second wheelset engaged with a third roller bearing and engaged with a fourth roller bearing; providing a first roller bearing adapter having AAR standard thrust lug clearances engaged with the first roller bearing, a second roller bearing adapter having AAR standard thrust lug clearances engaged with the second roller bearing, a third roller bearing adapter having AAR standard thrust lug clearances engaged with the third roller bearing, and a fourth roller bearing adapter having AAR standard thrust lug clearances engaged with the fourth roller bearing each roller bearing, each roller bearing adapter symmetrical about a lateral centerline and symmetrical about a longitudinal centerline, and defining a bottom surface and a crowned top surface, the top surface defining opposing first and second vertical shoulders that project upwardly from the top surface on either side of the side frame; providing a first adapter pad, a second adapter pad, a third adapter pad, a fourth adapter pad, each 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, and a second lateral flange projecting outwardly from the second upturned region;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, and a second lateral flange projecting outwardly from the second upturned region;a first outer elastomeric member disposed between the first lateral flanges of the top and bottom plates, defining a first outer edge, and having a static thickness within the range of 0.15 inches to 0.30 inches;a second outer elastomeric member disposed between the second lateral flanges of the top and bottom plates, defining a second outer edge, and having a static thickness within the range of 0.15 inches to 0.30 inches;a central elastomeric member disposed between the central portion of the top and bottom plates, defining a third outer edge, and having a static thickness within the range of 0.15 inches to 0.25 inches;a first substantially hollow portion disposed between the top plate and the bottom plate and between the central elastomeric member and the first outer elastomeric member;a second substantially hollow portion disposed between the top plate and the bottom plate and between the central elastomeric member and the second outer elastomeric member;a first elastomeric lateral adapter grip disposed between an inside surface of the first vertical shoulder of the engaged roller bearing adapter and the first upturned region of the bottom plate;a second elastomeric lateral adapter grip disposed between an inside surface of the second vertical shoulder of the engaged roller bearing adapter and the second upturned region of the bottom plate;a first elastomeric lateral side frame grip disposed between an outer surface of the first upturned region of the top plate and the first outer side of the engaged side frame pedestal;a second elastomeric lateral side frame grip disposed between an outer surface of the second upturned region of the top plate and the second outer side of the engaged side frame pedestal; engaging the first adapter pad with the first pedestal roof and the first roller bearing adapter such that movement of the top plate of the first adapter pad relative to the pedestal roof is restricted and that movement between the bottom plate of the first adapter pad relative to the first roller bearing adapter is restricted; engaging the second adapter pad with the second pedestal roof and the second roller bearing adapter such that movement of the top plate of the second adapter pad relative to the pedestal roof is restricted and that movement between the bottom plate of the second adapter pad relative to the second roller bearing adapter is restricted; engaging the third adapter pad with the third pedestal roof and the third roller bearing adapter such that movement of the top plate of the third adapter pad relative to the pedestal roof is restricted and that movement between the bottom plate of the third adapter pad relative to the third roller bearing adapter is restricted; engaging the fourth adapter pad with the fourth pedestal roof and the fourth roller bearing adapter such that movement of the top plate of the fourth adapter pad relative to the pedestal roof is restricted and that movement between the bottom plate of the fourth adapter pad relative to the fourth roller bearing adapter is restricted; wherein the top plate and bottom plate central portions and the central elastomeric member of each adapter pad are disposed at least in part beneath the engaged pedestal roof, and the first and second laterally projecting flanges of the top plate and the bottom plate and the first and second outer elastomeric members of each adapter pad are entirely disposed above the vertical shoulders of the engaged roller bearing adapter and outside of the engaged pedestal roof. |
