Rail road car draft fittings
View Patent ↗A rail road car has draft sills, and draft gear mounted in the draft sills, by which loads are passed along the train line of cars. The draft gear is mounted to the drafts sill webs between front and rear draft stops. The front and rear draft stops have portions that protrude beyond the plane of the inner face o the draft sill webs. The rear draft stops have a boss that extends past the plane of the inside face of the draft sill web, such that the peripheral weld about the boss may tend to be placed in stress in the plane of the web.
1. A rear draft stop for a rail road freight car, said rear draft stop having:
first and second structurally interconnected interfaces;
said first interface being operable to receive draft loads;
said second interface being operable to transmit the draft loads to a draft sill;
said second interface having first and second draft sill web engagement portions;
said first draft sill web engagement portion being locatable against a face of a draft sill wall; and
said second draft sill web engagement portion standing proud of said first draft sill web engagement portion;
said first draft sill web engagement portion of said second interface has a footprint for seating against said draft sill wall; and, when viewed normal to said footprint, said second draft sill web engagement portion has a centroid, said footprint being free of any gap therein subtending any arc greater than 150 degrees as measured from an angular origin located at said centroid.
2. The rear draft stop of claim 1 wherein said first draft sill web engagement portion of said second interface includes three contact points lying in a plane and said second draft sill web engagement portion of said second interface includes a protrusion standing proud of said plane.
3. The rear draft stop of claim 1 wherein said first draft sill web engagement portion includes a substantially planar surface for abutment against said draft sill wall and said second draft sill web engagement portion of said second interface includes a boss standing proud of said substantially planar surface.
4. The rear draft stop of claim 1 wherein said footprint includes at least two bosses.
5. The rear draft stop of claim 4 wherein said footprint includes at least three bosses.
6. The rear draft stop of claim 1 wherein:
a closed peripheral boundary is defined by a line of shortest length enclosing said footprint; and, when viewed perpendicular to a normal projection of said footprint, said second draft sill web engagement portion has a centroid; and said centroid lies within said closed peripheral boundary.
7. The rear draft stop of claim 5 wherein said footprint of said first draft sill web engagement portion extends continuously about said second draft sill web engagement portion of said second interface.
8. A draft assembly for a rail road freight car, said draft assembly comprising:
a draft sill having a draft pocket defined therewithin in which draft gear may be mounted;
said draft sill having a pair of spaced apart draft sill walls;
front and rear draft stops for mounting to said draft sill walls;
at least a first of said draft sill walls having a face oriented inwardly relative to said draft pocket;
said first draft sill wall having an accommodation formed therein;
one of said draft stops being a first draft stop, said first draft stop being a rear draft stop as claimed in claim 1 ;
said first interface defining a seat against which draft gear mounted in said draft pocket may work;
said second interface of said first draft stop being co-operably engaged with said first draft sill wall;
said first draft sill web engagement portion of said second interface being seated against said inwardly oriented face of said first draft sill wall.
9. The draft assembly of claim 8 wherein said accommodation includes an aperture formed in said first draft sill wall, said aperture has a profile, and said second draft sill web engagement portion of said second interface of said first draft stop has a footprint of a shape corresponding to said profile of said aperture.
10. The draft assembly of claim 8 wherein said accommodation has a narrowing profile that narrows from a broader end to a narrower end, and said second draft sill web engagement portion of said second interface has a corresponding narrowing profile; said second draft sill web engagement portion of said second interface narrows from a broader end to a narrower end, and said narrower end of said second draft sill web engagement portion of said second interface is more distant from said first interface of said first draft stop than is said broader end of said second draft sill web engagement portion of said second interface of said first draft stop.
11. The draft assembly of claim 8 wherein said accommodation includes an aperture formed through said first draft sill wall, said second draft sill web engagement portion of said second interface includes a protrusion seated within said aperture, said protrusion having a periphery, and said protrusion being welded within said aperture about said periphery, substantially to said through thickness of said draft sill wall.
12. The draft assembly of claim 8 wherein said draft sill wall has a first margin for cooperation with a draft sill upper flange, and a second margin distant therefrom, said accommodation is a rebate formed through said draft sill wall, said rebate has an entrance formed in said second margin, and said first draft stop can be introduced into said accommodation through said entrance at said second margin.
13. The draft assembly of claim 8 wherein said pair of spaced apart draft sill walls are left and right and draft sill webs, each of which extends in a substantially vertical plane running in the lengthwise direction of the rail road freight car; said first draft sill wall is substantially planar; said first draft sill web engagement portion of said second interface is substantially planar for mating abutment with said substantially planar first draft sill wall; said accommodation defines a recess in said first draft sill wall, and said second draft sill web engagement portion of said second interface protrudes beyond said substantially planar first draft sill web engagement portion of said second interface to seat in said recess in said first draft sill wall.
14. A rear draft stop for a rail road freight car, said rear draft stop having:
first and second structurally interconnected interfaces;
said first interface being operable to receive draft loads;
said second interface being operable to transmit the draft loads to a draft sill;
said second interface having first and second draft sill web engagement portions;
said first draft sill web engagement portion being locatable against a face of a draft sill wall; and
said second draft sill web engagement portion standing proud of said first draft sill web engagement portion;
said first draft sill web engagement portion of said second interface defines a continuous planar peripheral land for planar abutment against an inwardly facing surface of a wall of said draft sill; and
said second draft sill web engagement portion of said second interface includes at least one boss extending proud of said planar peripheral land.
15. The rear draft stop of claim 14 wherein said second interface includes at least three bosses.
16. The rear draft stop of claim 15 wherein said first draft sill web engagement portion of said second interface has a footprint, a closed peripheral boundary is defined by a line of shortest length enclosing said footprint, and, when viewed perpendicular to a normal projection of said footprint said second draft sill web engagement portion has a centroid; and said centroid lies within said closed peripheral boundary.
17. A draft assembly for a rail road freight car, said draft assembly comprising:
a draft sill having a draft pocket defined therewithin in which draft gear may be mounted;
said draft sill having a pair of spaced apart draft sill walls;
front and rear draft stops for mounting to said draft sill walls;
at least a first of said draft sill walls having a face oriented inwardly relative to said draft pocket;
said first draft sill wall having an accommodation formed therein;
one of said draft stops being a first draft stop, said first draft stop being a rear draft stop as claimed in claim 14 ;
said first interface defining a seat against which draft gear mounted in said draft pocket may work;
said second interface of said first draft stop being co-operably engaged with said first draft sill wall;
said first draft sill web engagement portion of said second interface being seated against said inwardly oriented face of said first draft sill wall.
18. The draft assembly of claim 17 wherein said accommodation includes an aperture formed in said first draft sill wall, said aperture has a profile, and said second draft sill web engagement portion of said second interface of said first draft stop has a footprint of a shape corresponding to said profile of said aperture.
19. The draft assembly of claim 17 wherein said accommodation has a narrowing profile that narrows from a broader end to a narrower end, and said second draft sill web engagement portion of said second interface has a corresponding narrowing profile; said second portion of said second interface narrows from a broader end to a narrower end, and said narrower end of said second draft sill web engagement portion of said second interface is more distant from said first interface of said first draft stop than is said broader end of said second draft sill web engagement portion of said second interface of said first draft stop.
20. The draft assembly of claim 17 wherein said accommodation includes an aperture formed through said first draft sill wall, said second draft sill web engagement portion of said second interface includes a protrusion seated within said aperture, said protrusion having a periphery, and said protrusion being welded within said aperture about said periphery.
21. The draft assembly of claim 17 wherein said draft sill wall has a first margin for cooperation with a draft sill upper flange, and a second margin distant therefrom, said accommodation is a rebate formed through said draft sill wall, said rebate has an entrance formed in said second margin, and said first draft stop can be introduced into said accommodation through said entrance at said second margin.
22. The draft assembly of claim 17 wherein said pair of spaced apart draft sill walls are left and right and draft sill webs, each of which extends in a substantially vertical plane running in the lengthwise direction of the rail road freight car; said first draft sill wall is substantially planar; said first draft sill web engagement portion of said second interface is substantially planar for mating abutment with said substantially planar first draft sill wall; said accommodation defines a recess in said first draft sill wall, and said second draft sill web engagement portion of said second interface protrudes beyond said substantially planar first draft sill web engagement portion of said second interface to seat in said recess in said first draft sill wall.
23. A rear draft stop for a rail road freight car, said rear draft stop having:
first and second structurally interconnected interfaces;
the first interface being operable to receive draft loads, and the second interface being operable to transmit loads to a draft sill;
the second interface having first and second draft sill web engagement portions;
the first draft sill web engagement portion being locatable against a face of a draft sill wall;
the second draft sill web engagement portion standing proud of the first draft sill web engagement portion;
said second draft sill web engagement portion of said second interface is a boss standing proud of said first draft sill web engagement portion of said second interface;
said first draft sill web engagement portion of said second interface extends in a plane; and
said boss has an end face substantially parallel to said plane of said first draft sill web engagement portion of said second interface.
24. The rear draft stop of claim 23 wherein said first draft sill web engagement portion of said second interface has a footprint for seating against said draft sill wall, and, when viewed normal to said footprint said second draft sill web engagement portion has a centroid, said footprint being free of any gap therein subtending any arc greater than 150 degrees as measured from an angular origin located at said centroid.
25. A draft assembly for a rail road freight car, said draft assembly comprising:
a draft sill having a draft pocket defined therewithin in which draft gear may be mounted;
said draft sill having a pair of spaced apart draft sill walls;
front and rear draft stops for mounting to said draft sill walls;
at least a first of said draft sill walls having a face oriented inwardly relative to said draft pocket;
said first draft sill wall having an accommodation formed therein;
one of said draft stops being a first draft stop, said first draft stop being a rear draft stop as claimed in claim 23 ;
said first interface defining a seat against which draft gear mounted in said draft pocket may work;
said second interface of said first draft stop being co-operably engaged with said first draft sill wall;
said first draft sill web engagement portion of said second interface being seated against said inwardly oriented face of said first draft sill wall.
26. The draft assembly of claim 25 wherein said accommodation includes an aperture formed in said first draft sill wall, said aperture has a profile, and said second draft sill web engagement portion of said second interface of said first draft stop has a footprint of a shape corresponding to said profile of said aperture.
27. The draft assembly of claim 25 wherein said accommodation has a narrowing profile that narrows from a broader end to a narrower end, and said second draft sill web engagement portion of said second interface has a corresponding narrowing profile; said second draft sill web engagement portion of said second interface narrows from a broader end to a narrower end, and said narrower end of said second draft sill web engagement portion of said second interface is more distant from said first interface of said first draft stop than is said broader end of said second draft sill web engagement portion of said second interface of said first draft stop.
28. The draft assembly of claim 25 wherein said accommodation includes an aperture formed through said first draft sill wall, said second draft sill web engagement portion of said second interface includes a protrusion seated within said aperture, said protrusion having a periphery, and said protrusion being welded within said aperture about said periphery.
29. The draft assembly of claim 25 wherein said draft sill wall has a first margin for cooperation with a draft sill upper flange, and a second margin distant therefrom, said accommodation is a rebate formed through said draft sill wall, said rebate has an entrance formed in said second margin, and said first draft stop can be introduced into said accommodation through said entrance at said second margin.
30. The draft assembly of claim 25 wherein said pair of spaced apart draft sill walls are left and right and draft sill webs, each of which extends in a substantially vertical plane running in the lengthwise direction of the rail road freight car; said first draft sill wall is substantially planar; said first draft sill web engagement portion of said second interface is substantially planar for mating abutment with said substantially planar first draft sill wall; said accommodation defines a recess in said first draft sill wall, and said second draft sill web engagement portion of said second interface protrudes beyond said substantially planar first draft sill web engagement portion of said second interface to seat in said recess in said first draft sill wall.