IPC분류정보
| 국가/구분 |
United States(US) Patent
등록
|
| 국제특허분류(IPC7판) |
|
| 출원번호 |
US-0620968
(2012-09-15)
|
| 등록번호 |
US-8720347
(2014-05-13)
|
| 우선권정보 |
CA-2434603 (2003-07-08); CA-2436327 (2003-07-31); CA-2454472 (2003-12-24) |
|
발명자
/ 주소 |
- Forbes, James Wilfred
- Hematian, Jamal
|
| 출원인 / 주소 |
- National Steel Car Limited
|
| 대리인 / 주소 |
|
| 인용정보 |
피인용 횟수 :
0 인용 특허 :
176 |
초록
▼
A rail road freight car truck has a truck bolster mounted transversely between a pair of side frames. The mounting interface between the wheelset axle ends and the sideframe pedestals includes a bearing adapter. It has an upper portion that seats in the sideframe pedestal. The underside, lower porti
A rail road freight car truck has a truck bolster mounted transversely between a pair of side frames. The mounting interface between the wheelset axle ends and the sideframe pedestals includes a bearing adapter. It has an upper portion that seats in the sideframe pedestal. The underside, lower portion, of the bearing adapter defines sits on the wheelset bearing casing. The lower portion has an apex, and has a first land portion for engaging a first portion of the bearing casing, and a second land portion for engaging a second portion of the bearing casing. The apex lies circumferentially between the first and second lands portions. There is a relief formed at the apex over the bearing race, so that vertical load is split to enter the casing to either side of top dead center.
대표청구항
▼
1. A bearing adapter for installation in a rail road car truck sideframe pedestal, said bearing adapter having an upper portion engageable with a pedestal seat, and a lower portion engageable with a bearing casing of a rail road car truck wheelset bearing, said lower portion having an apex, said low
1. A bearing adapter for installation in a rail road car truck sideframe pedestal, said bearing adapter having an upper portion engageable with a pedestal seat, and a lower portion engageable with a bearing casing of a rail road car truck wheelset bearing, said lower portion having an apex, said lower portion defining a seat for engaging a bearing casing; said seat including a first land portion for engaging a first portion of the bearing casing, a second land portion for engaging a second portion of the bearing casing, said first land portion lying to one side of the apex, said second land portion lying to the other side of the apex, and at least one relief formed at said apex for seating over a bearing race of the bearing, said relief being located circumferentially between said first and second lands. 2. The bearing adapter of claim 1 wherein said bearing adapter has two reliefs at said apex, said reliefs being a first relief and a second relief, said two reliefs being spaced along said apex from each other, each relief being for seating over a bearing race of the bearing. 3. The bearing adapter of claim 1 wherein said relief is a groove that runs lengthwise along said apex. 4. The bearing adapter of claim 1 wherein said lower portion has a shape conforming to a body of revolution, said relief is a groove running along said apex, and said bearing adapter has a circumferentially extending underside groove that intersects said relief. 5. The bearing adapter of claim 1 wherein said underside of said bearing adapter includes four land portions formed on a common radius conforming to a body of revolution. 6. The bearing adapter of claim 1 wherein said at least one relief includes a first relief, said seat of said lower portion includes an array of pads formed on an arcuate profile; each of said first and second land portions includes one of said pads; and said pads are circumferentially separated by said first relief of said part of said apex of said seat. 7. The bearing adapter of claim 6 wherein: said seat includes a first pad, and a second pad, a third pad and a fourth pad;said first pad and said second pad are axially spaced from said third and fourth pads;said first pad is circumferentially spaced from said second pad;said third pad is circumferentially spaced from said fourth pad; andsaid relieved part of said central portion is located circumferentially between said first pad and said second pad, and between said third pad and said fourth pad. 8. The bearing adapter of claim 1 wherein said bearing adapter has a longitudinal plane of symmetry and a transverse plane of symmetry, said apex runs along said transverse plane of symmetry, and said lower portion of said bearing adapter is relieved along said apex to either side of said longitudinal plane of symmetry. 9. A combination of the bearing adapter of claim 2 and a bearing having a casing and axially spaced races contained within the casing, wherein said bearing adapter has a first said relief mounted over one of said races, and a second said relief mounted over another of said races. 10. The subject matter of claim 1 wherein said bearing adapter has a pair of spaced apart arches, and said lower portion lies between said arches. 11. The subject matter of claim 1 in combination with and a pedestal seat, the upper portion of the bearing adapter having a first rolling contact surface, the pedestal seat having a second rolling contact surface, said first and second rolling contact surfaces being operable to provide self-steering. 12. The subject matter of claim 1 wherein said upper portion of said bearing adapter has a surface having both longitudinal and transverse curvature. 13. A railroad car truck that includes the subject matter of claim 1. 14. The railroad car truck of claim 13 wherein said truck is a self-steering truck. 15. A bearing adapter for seating upon a cylindrical bearing casing of a wheelset bearing of a railroad car truck, within a pedestal seat of a pedestal 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 the round cylindrical bearing casing, the bearing races extending about the axis of rotation in a circumferential direction, wherein said bearing adapter comprises: a metal body having a pair of axially spaced apart end arches; a first seat conforming to an upwardly facing portion of the cylindrical bearing casing, said first seat extending axially between said end arches; and a second seat for orientation facing the pedestal seat;said first seat having at least a first relief formed in said metal of said bearing adapter body; and, as seated on the bearing casing in use,said first relief extending to a first location, said first location being axially abreast of a first bearing race of the bearing;said first seat including first and second portions lying axially abreast of said relief;when installed on the bearing casing, said first and second portions of said first seat lying circumferentially to either side of top dead center thereof; said first and second portions defining load path interfaces circumferentially to either side of said first relief, by which to pass loads between said bearing adapter and the bearing casing abreast of that first 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 first relief formed in said metal of said bearing adapter. 16. The bearing adapter of claim 15 wherein: said first seat 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 the first bearing race; said first seat including a central portion located circumferentially between said side portions, at least part of said central portion including said first relief formed in said metal body. 17. The bearing adapter of claim 15 wherein, as positioned in use, said first seat is defined in a first surface, and said first surface is relieved at top dead center axially abreast of two bearing races of the bearing. 18. The bearing adapter of claim 15 wherein said bearing adapter has two said reliefs formed therein, said reliefs being axially spaced from each other, and said reliefs having the form of cusps formed in said first surface. 19. The bearing adapter of claim 15 wherein, as positioned in use, said relief extends axially along top dead center of said first seat. 20. The bearing adapter of claim 15 and further including a circumferentially extending groove locatable on the bearing casing axially intermediate the bearing races. 21. The bearing adapter of claim 15 wherein said bearing adapter body is made of one of (a) iron; and (b) steel. 22. The bearing adapter of claim 15 wherein said bearing adapter includes end walls and corner portions co-operable to seat about pedestal jaw thrust lugs of the sideframe. 23. The bearing adapter of claim 15 wherein said first and second side portions are formed on radiused arcs of a first radius of curvature, said radius of curvature having a center of curvature, and, at the location of said relief, said central portion has a surface facing toward said center of curvature, said surface of said relief lying a distance greater than said first radius of curvature from said center of curvature. 24. The bearing adapter of claim 15 wherein: said first seat of said bearing adapter includes an array of pads formed on an arcuate profile; each of said first and second portions includes respective first and second ones of said pads; and said first and second pads are circumferentially separated by said relief of said part of said central portion of said first seat. 25. The bearing adapter of claim 24 wherein: said first seat of said bearing adapter includes a first pad, and a second pad, a third pad and a fourth pad; said first pad and said second pad are axially spaced from said third and fourth pads; said first pad is circumferentially spaced from said second pad; said third pad is circumferentially spaced from said fourth pad; and said relieved part of said central portion is located circumferentially between said first pad and said second pad, and between said third pad and said fourth pad. 26. The bearing adapter of claim 15 wherein said second seat of said bearing adapter includes an arcuate surface having a curvature formed in the lengthwise direction of the sideframe to permit lengthwise rolling contact rocking of said bearing adapter in said sideframe. 27. The bearing adapter of claim 15 wherein said second seat of said bearing adapter includes an arcuate surface having a curvature formed in a cross-wise direction relative to the sideframe to permit sideways rolling contact swinging of the sideframe thereon. 28. The bearing adapter of claim 15 in combination with a resilient pad, said resilient pad being mounted in said second seat of said bearing adapter. 29. A railroad car truck having a pair of sideframes and a truck bolster mounted cross-wise therebetween, said sideframes having pedestal mounts, and said sideframes being mounted to wheelsets, the wheelsets having bearings, wherein said truck incorporates the subject matter of claim 15.
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