Rail road car truck and fittings therefor
First Claim
1. A bearing adapter for installation between a bearing of a railroad car truck wheelset and a pedestal mounting of a railroad car truck sideframe, the wheelset bearing having an axis of rotation defining an axial direction, and first and second axially spaced apart bearing races contained within a round cylindrical bearing casing of the bearing, the bearing races extending about the axis in a circumferential direction, the pedestal mounting having a roof that, in operation, lies over the bearing, wherein said bearing adapter comprises:
- a metal body having a pair of axially spaced apart end arches for engaging the bearing, and a first seat extending between the arches, said first seat being formed to engage the round cylindrical bearing casing of the wheel bearing, and a second seat for orientation facing toward the pedestal mounting roof;
said first seat including first and second side portions having surfaces conforming to, and for mating with, the round cylindrical bearing casing at circumferentially spaced apart locations on the round cylindrical bearing casing abreast of one of the bearing races;
said first seat including a central portion located circumferentially between said side portions, at least part of said central portion including a relief formed in said metal body; and
,said bearing adapter being mountable on the bearing in a position in which said relief of said part of said central portion is located abreast of and above one of the bearing races and said first and second portions are located circumferentially to either side of top dead center of the bearing respectively, and, when so mounted, said first and second portions defining dominant load transfer interfaces from said bearing adapter into said bearing for vertical loads from the sideframe passed into said bearing adapter at said second seat circumferentially to either side of said relief.
6 Assignments
0 Petitions
Accused Products
Abstract
A rail road freight car truck has a truck bolster and a pair of side frames, the truck bolster being mounted transversely relative to the side frames. The mounting interface between the ends of the axles and the sideframe pedestals allows lateral rocking motion of the sideframes in the manner of a swing motion truck. The lateral swinging motion is combined with a longitudinal self steering capability. The self steering capability may be obtained by use of a longitudinally oriented rocker that may tend to permit resistance to deflection that is proportional to the weight carried across the interface. The truck may have auxiliary centering elements mounted in the pedestal seats, and those auxiliary centering elements may be made of resilient elastomeric material. The truck may also have friction dampers that have a disinclination to stick-slip behavior. The friction dampers may be provided with brake linings, or similar features, on the face engaging the sideframe columns, on the slope face, or both. The friction dampers may operate to yield upward and downward friction forces that are not overly unequal. The friction dampers may be mounted in a four-cornered arrangement at each end of the truck bolster. The spring groups may include sub-groups of springs of different heights.
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Citations
33 Claims
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1. A bearing adapter for installation between a bearing of a railroad car truck wheelset and a pedestal mounting of a railroad car truck sideframe, the wheelset bearing having an axis of rotation defining an axial direction, and first and second axially spaced apart bearing races contained within a round cylindrical bearing casing of the bearing, the bearing races extending about the axis in a circumferential direction, the pedestal mounting having a roof that, in operation, lies over the bearing, wherein said bearing adapter comprises:
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a metal body having a pair of axially spaced apart end arches for engaging the bearing, and a first seat extending between the arches, said first seat being formed to engage the round cylindrical bearing casing of the wheel bearing, and a second seat for orientation facing toward the pedestal mounting roof; said first seat including first and second side portions having surfaces conforming to, and for mating with, the round cylindrical bearing casing at circumferentially spaced apart locations on the round cylindrical bearing casing abreast of one of the bearing races; said first seat including a central portion located circumferentially between said side portions, at least part of said central portion including a relief formed in said metal body; and
,said bearing adapter being mountable on the bearing in a position in which said relief of said part of said central portion is located abreast of and above one of the bearing races and said first and second portions are located circumferentially to either side of top dead center of the bearing respectively, and, when so mounted, said first and second portions defining dominant load transfer interfaces from said bearing adapter into said bearing for vertical loads from the sideframe passed into said bearing adapter at said second seat circumferentially to either side of said relief. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A bearing adapter for seating upon a rail road car truck wheelset bearing within a pedestal of a railroad car truck sideframe, said bearing adapter being made of metal;
- said bearing adapter having a pair of axially spaced apart arches and a first surface generally conforming to an upwardly facing portion of a cylindrical bearing casing, said first surface extending axially between said end arches, and a second surface for orientation facing a pedestal seat of the pedestal, said first surface having at least one relief formed in said metal of said bearing adapter at top dead center of said first surface, and, as seated on the bearing casing in use, said relief extending to at least one location axially abreast of a bearing race of the bearing, said first surface including first and second portions lying axially abreast of and circumferentially to either side of said relief by which to pass loads between said bearing adapter and the bearing casing abreast of that bearing race, whereby loads passed between said bearing adapter and the bearing are forced to split into dominant load paths to either side of said relief formed in said metal of said bearing adapter.
- View Dependent Claims (21, 22, 23, 24, 25, 27, 28, 29, 30, 31, 32, 33)
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26. A bearing adapter for seating upon a rail road car truck wheelset bearing within a railroad car truck sideframe pedestal, said bearing adapter having a body that is a casting made of one of (a) iron and (b) steel, wherein said body has a pair of axially spaced apart arches for location at either end of the bearing, and two pair of corner abutments forming respective channels for seating about sideframe pedestal thrust blocks;
- said body having a first surface generally conforming to an upwardly facing portion of a round cylindrical bearing casing, said first surface extending axially between said end arches, and a second surface for orientation facing the pedestal seat, said first surface being formed on a curve having an apex, said surface having at least one relief formed in said casting at said apex thereof, and, as seated on the bearing casing in use, said relief extending to at least one location axially abreast of a bearing race of the bearing, said first surface including first and second portions lying axially abreast of and circumferentially to either side of said relief by which to pass loads between said bearing adapter and the bearing casing abreast of that bearing race, whereby loads passed between said bearing adapter and the bearing are forced to split into dominant load paths to either side of said relief.
Specification