US2222480A - Center sill reinforcement - Google Patents

Description

Nav. 19, 1940. R. B. coi-TRELL @ENTER S ILL REINFORCEMENT Filed May 12,v 1939 2 Sheets-Sheet l l l I ATTORNEY.

19p R. B. SHELL 2,222,148

CENTER SILL REINFORCEMENT l Filed May 12, 1939 2 Sh8etS-Sheet 2 ATTORNEY Patented Nov. 19, 1940 UNITED STATES 2,222,480 CENTER SlLL-RENFORCERIENT Robert B. Cottrell, Chicago, IIL. assigner to American Steel Foundries, Chicago, Ill., a corporation of New Jel'll! Application May 12, 1939, Serial N0. 273,163

2z calma My invention relates to underframe structure for railway cars and more particularly to a. form of center sill structure in common use comprising symmetrical rolled members of Z section adapted -to be welded along abutting edges to form a substantially integral structure of inverted U section having laterally extending lon' gitudinal flanges along the bottom edgesthereof. Such a center sill structure is sometimes referred to as the backbone of theear body and at spaced points longitudinally thereof adjacent each end the structure is commonly reinforced with a center ller casting and adjacent draft lugs, the center 1111er casting affording a seat and a means of connectionto the center bearing of an associated car truck.

In a co-pending application, Serial No. 197,647, iiled in the United States Patent Ofce on March 23, 1938, and issued as Patent No. 2,180,799, Nov. 21, 1939, wherein I am co-inventor, such a center sill is shown as that above described. In the present application I am showing a modied and improved form of center filler and draft lug casting adapted to be associated with a center sill. As welding art has developed it has become practicable to use machine equipment instead of manually operated tools to'weld associated structural parts. In designs of center filler and draft lug castings heretofore available, vmanual welding has been a Vnecessary part of the fabricated plan. In my present application I have designed a novel form of center ller and draft lug casting wherein all of the welding may be done along straight lines afterthe center filler and draft lug casting has been placed in position between the members of the center sill. It will readily be appreciated that such a structure, if

sillsy as provided for gives great strength aswell as unusual economyof weight.

An object of my invention is to design a casting of the above described character capable of withstanding the heavy thrust it is normally enbjected to in modern railway operation, while at the same. time eliminating all manual welding from the fabricating operation.

Another object of my invention is to devise a one-piece center filler casting with rear draft lugs integral therewith, suitable forapplication to a centersill member by welding, in which the (ci. 10s-416) amount of machining required-for proper tting is reduced to a minimum. L

Yet another object of my invention is to design a one-piece integral casting comprising a center filler and adjoining draft lugs suitable for fitting between the members of a center sill as above described and adapted to be welded in place solely by machine welding operations.

'I'hese and various other objects are accomplished in a manner more clearly set forth in the m following description and the appended claims in. view of the associated drawings.

Figure 1 is a top plan view of. a center sill structure incorporating my invention.

Figure 2 is a side elevation'thereof. l

Figure 3 is an end view thereof,'half in section, the section being taken substantially in the transverse vertical plane indicated by the line 3--3 of Figure l.

Figure 4 is a top plan view, partly in section, of my novel form of center filler and draft lug casting, the section being taken substantially in the transverse horizontal plane indicated by the line 4-8 of Figure 5.

Figure 5 is a section in the vertical longitudinal plane bisecting the structure shown in Figure 4, the section being taken substantially as indicated by the line 5 5 of Figure 4.

Figure 6 is an end view taken from the left as seen in Figures 4 and 5, partly in section, the section being taken substantially in the transverse vertical plane indicated by the line 6 8 of Figure 5.

Figure 'i is an end view taken fromthe right as seen in Figures 4 and 5, partly in section, the section being taken substantially in the transverse `yertical plane indicated by the line 'l--l of Figure 5. y

Figures 1 to 3 show the parts in assembled relationship. It may be noted that the car w center sill 2 is of inverted U section having the top web fl, the side webs 6, t, and the relatively thick base flanges t, 6. While such a member may be-.rolled as a single piece, a common method of forming it is by uniting by welding as at 5 i@ two Z-Shaped members along their abutting top edges. Within the said sill is fitted my novel form of skeletal center filler and draft lug casting ii, said casting being bisymmetrical in form,

having along each side a plurality of substan- 50 tially parallel longitudinal ribs designated I2, I d and it from top to bottom, each of said ribs extending in a straight line from one end of the substantially a wall structure at either side of the casting II. Joining said walls and spaced from the lowermost of said longitudinal' ribs I6, I6 is-the bottom wall I8 having therein a plurality of lightening Aopenings 20, 20, said bottom wall extending along one end of thecasting to forma substantial means of cooperation with the center plate of an associated truck bolster. Extending upwardly from the bottom wall I8. and centrally thereof is the center post 22 with the central opening 23, the top of said Vpost vterminating vas at 24 short of the top of said casting as best seen in Figures 3 and 5. l,Extending bei.

tween the lateralwalls of the casting and integrally formed therewith and with the base I 8 is a single vertical transverse wall 26 interrupted centrally thereof by the before-mentioned vcenter post 22 and substantially at right angles to the transverse wall I6 is formed the longitudinal wall 28- of generally triangular form having the elongated base reaching from end to end of the bottom wall I8 and tapering therefrom at either end to extend through the horizontal wall 38 and merge with the center post 22 adjacent the top thereof as best seen in the sectional View of Figure 5. The horizontal wall' 30 extends between the longitudinal ribs. I4, I4 at either side of the structure intermediate the top and bottom thereof and at one side of the center post 22 said intermediate wall 30 is cored out to form the large lightening opening 32. Each of the longitudinal ribs I2, I4 and I6 has formed therealong a raised machinable pad 34, said pad after machiningv being normally positioned in alignment with a plurality of longitudinal slots cut in the side webs 6, 6-of the sill member 2 asindicated at 36 38, 40, 42, 44 and 46 (Figure 2). tudinal slots 36, 38, 40, 42, 44 and 46 afford openings into which welding material may be applied,

thus securing the longitudinal ribs of the casting to the webs 6, 6 of the center sill insuch manner 1 6 of the sill when placed in position, said spacing being best seen at 48, 48 in Figure 3. The bottom longitudinal edges of the casting I2 are formed with radii as best seen at 52, 52 (Figure 3), thus affording additional Welding area along straight longitudinal lines if desired.

It may be noted that the draft stops at the left of the casting as viewed in Figures 1 and 2 are so positioned as to be centrally located along the web 6, 6 at either side of the center siii and are spaced from the top'and bottom of the sill. The base wall of the casting I8 extends along only that portion thereof which forms an abutment for the body center bearing or center plate. The detail of the center fLller and draft lug casting is shown in Figures 4, 5, 6 and '7. Porl tions thereof have already been referred to and particularly the bottom wall I8, the center post 22, thetransverse vertical wall 26, the central longitudinal rib or wall 28, theintermediate horizontal wall 30, the longitudinal ribs I2, I4 and I6 at each side thereof, the openings 20, 20 cored out of the bottom wall I8, and the large openwith respect to the ribs is well seen atV 48, 48 in The longiing 32 cored out of the intermediate wall 3l). 'Ihe transverse wall 26 h'as openings 54 cored therein between the bottom wall I8 and intermediate wall 30, and the longitudinal rib or wall 28 has openings 56 cored therein adjacent `the bottom of the center post 22. spaced webs at the ends ofv the casting-f adilat :intermediate points join the spaced longitudinal ribs I2, I4 and I6 and the base of the casting as indicated at 458, 60, 62, 64, 66 and 68 with-relatively large '#elon'gated'openings cored therein as indicated ,4 at 10, III (Figure l The manner in which the webs between the'` longitudinal ribs are relieved.

theend view of Figure 6. By this arrangement I have made it possible for one machining operation to trim olf the pads at each side of the casting with a minimum of work to lit said casting between the webs 6, 6 of the center v'sill for the welding operation. f

'I'he longitudinalV ribs rare widened laterally of the casting adjacent the draft stopas ybest seen atlz, 12 (Figurefl) anda reinforcing vertical rib '14 extends between the opposite draft stop portions at the'adjacent end of the inter; mediate wall 30, said rib "I4 being widened vertically at its endsl to merge with each Aof the lon' gitudinal ribs and narrowed intermediate its ends to lighten the casting. The rib 14 is spaced somewhat from the stops 58 at the end of the casting and its juncture with the intermediate 'rib I4 is reinforced by the horizontal gusset 16.

It is to be understood that I do'not wish to be limited by the exact embodiment of the device shown which is merely by way of illustration and not limitation as various and other forms of the device will, of course, be' apparent to those skilled in the art without departing-from the spirit of the invention or the scope of the claims.

I claim: f

1. 1n a railway car, a center sill of inverted U section and a reinforcing center ller and draft lug casting therein comprising a plurality of spaced longitudinal ribs spaced from the bottom wall thereof and aligned with longitudinal openings in the vertical webs of said sill, whereby said ribs may be welded to said sills in parallel longitudinal lines, said casting comprising a cenlr` ter filler portion anda draft stop portion, said center 'filler portion including a transverse vertical wall and a longitudinal vertical wall sub stantiallyat right vangles to each other and in`- terrupted intermediate their ends by a center post, and an intermediate horizontal wall extending between parallel ribs at opposite sides of said casting intermediate the ends of said center post, said intermediate wall extending through said center filler portion and into saidvdraft lug portion, and a transverse vertical web at the end of said intermediate wall joining opposite sides of said draft lug portion.

2. In a railway car, a center sill of inverted U section and a reinforcing center ller and draft lug casting therein comprising va plurality of parallel ribs at opposite sides of said casting lintermediate the ends of said center post.

3. In a railway car underframe, a center sill of inverted U section having a plurality of spaced parallel longitudinal .openings in the lateral webs thereof and reinforcing means therein in the form of an integral skeletal casting havingat each side thereof. a plurality of spaced parallel ribs each in alignment with a plurality of said plurality of vertical walls arranged at right an-v gles to each other and interrupted at their intersection by a center post, one of said vertical walls tapering from the ends of one of said horizontal walls through the other thereof to the top of said center post.

4. In a railway car underframe, a center sill of inverted U section having a plurality of spaced parallel longitudinal openings in the lateral webs thereof and reinforcing means therein in the form of an integral skeletal casting having at each side thereof a plurality of spaced parallel -ribs each in alignment with a plurality of said openings and weldable therethrough along parallel longitudinal straight lines, said casting comprising a center ller portion and a draft lug portion, said draft lug portion being arranged along the vertical webs of said sill and spaced from the top and-'bottom thereof, and said center sill portion comprising a bottomwall aligned with the bottom edges of said sill and a center post centrally arranged with respect to said bottom wall.

5. In a railway car, a center sill of inverted U section and a reinforcing center filler and draft lug casting therein comprising a plurality of spaced longitudinal ribs spaced from the bottom wall thereof and aligned with longitudinal openings in the vertical webs of said sill, whereby said ribs may be welded to said sills in parallel longitudinal lines, said casting comprising a bottom wall, a center post, a transverse wall extending between certain of lsaid ribs and interrupted by said center post, and a central longitudinal wall tapering from adjacent the ends of said base to the top of said center post and spaced fromI nal walls arranged substantially at right angles to each other and interrupted centrally of said casting by a center post, said longitudinal wall tapering from adjacent said base to the top of said center post and terminating short of the top of said casting, said lateral walls being normally spaced from the walls of said sill, whereby said ribs may be machined to afford a close t with the walls of said sill for welding thereto through said openings.

7. In a railway car, a center sill of inverted U section, a reinforcing center filler and draft lug casting therein in the form of a skeletal casting having along each side a plurality of spaced parallel pads each aligned with a plurality of openings in said sill, whereby said casting may be welded to said sill through said openings, said casting comprising an intermediate horizontal wall and an intermediate vertical wall arranged substantially at right angles `to each other and interrupted centrally of said casting by a center post, said vertical wall tapering downwardly from the top of said center post to spaced points on opposite sides thereof adjacent the base oi said casting, each side of said casting being afforded a tapering end portion adapted to accommodatesuccessive termination of said pads and so afford a gradually diminishing section-modulus when welded to said sill. y

8. In a railway car, a center sill of inverted U section, a reinforcing center filler and draft lug casting therein in the form of a. skeletal casting having along each side a plurality of spaced parallel pads each aligned with a plurality of openings in said sill whereby said casting maybe welded to said sillthrough said openings, said casting comprising an intermediate horizontal wall and an intermediate vertical wall arranged substantially at right angles to each other and interrupted centrally of said casting by-a center post, said horizontal wall lying in the same plane as certain of said pads at opposite sides ofv said casting, each side of saidfcasting being afforded a tapering end portion adapted to accommodate successive termination of said pads and so afford a gradually diminishing section-modulus when. weldedto said sill.

9. In a railway car, a center sill of inverted U section and a reinforcing center filler and i -of spaced longitudinal ribs spaced from the bottom wall thereof andaligned with longitudinal openings in the vertical webs of said sill, whereby said ribs may be welded to said sills in parallel longitudinal lines, said casting comprising vertical transverse and longitudinal walls interrupted lby a center post, said longitudinal wall tapering fromadjacent the ends of the base of the casting to the top of said center post, each side of said casting being afforded a tapering end portion adapted to accommodate successive termination of said ribs and so afford a gradually diminishing section-modulus when welded to said sill.

10. In a railway car, a center sill of inverted U section, a reinforcing center ller and draft lug casting therein in the form of a skeletal casting having along each side a plurality of spaced parallel pads each aligned with a plurality of openings in said sill, whereby said casting may be welded to said sill through said openings, said casting comprising an intermediate horizontal wall and an intermediate vertical wall arranged substantially at right angles to each other and 'interrupted centrally of said casting by a center post, each side of said casting being afforded a tapering end portion adapted to accommodate successive termination of said pads and so af-` fordv a gradually diminishing section-modulus when welded to said sill.

11. In a car underframe, a center sill of -inverted U section having spaced parallel slots, reinforcing means in said sill in the form of an integral skeletal casting comprising spaced parallel ribs at opposite sides thereof in alignment with said slots and weldable therethrough, said casting also comprising a bottom wall spaced `from said ribs and a vertical longitudinal intermediate wall interrupted centrally thereof by a center post, said intermediate wall tapering from the ends of the base of said casting to the top of said center post, each side of said casting being afforded a tapering end portion adapted to accommodate successive termination of said ribs and so afford a gradually diminishing secintegral skeletal casting comprising spaced parallel ribs at opposite sides thereof in alignment with said slots and weldable therethrough, said castingr also comprising spaced horizontal walls and a vertical longitudinal wall intermediate the sides thereof,lsaid vertical wall tapering from adjacent the ends of one of said horizontal walls through the other of said horizontal walls to adjacent the top of said casting, one of said horizontal walls -extending between corresponding intermediate ribs at opposite sides of said casting.

13. In a railway car, a center sill of inverted U section and a reinforcing center ller and draft lug casting therein comprising a plurality of spaced longitudinal ribs spaced from the bottom wall thereof and aligned with longitudinal openings in the vertical webs of said sill, Whereby said ribs may be welded to said sills in parallel longitudinal lines, said casting comprising a bottom wall, a center post, atransverse wall extending between certain of said ribs and interrupted by said center post, and'a central longitudinal wall tapering from adjacent the ends of said base to the-top of said center post, each of said ribs extending substantially from end to end of said casting for welding through said openings.

14. In a car underframe, a center sill of in-v verted U section having spaced parallel slots, reinforcing means in said sill in the form of an integral skeletal casting comprising spaced parallel ribs at opposite sides thereof in alignment with said slots and weldable therethrough, said casting also comprising bottom and intermediate horizontal walls, transverse and longitudinal vertical walls, and a center post interrupting all of said walls centrally of said casting, saidintermediate horizontal wall extending directly between corresponding intermediate ribs at opposite sides of said casting.

15. In a carunderframe, a center sill of inverted `U section having spaced parallel slots, reinforcing/means in said sill in the form of an integral skeletal casting comprising spaced parallel ribs atopposite sides thereof in alignment with said slots and weldable therethrough, said casting also comprising bottom and intermediate horizontal walls, transverse and longitudinal vertical walls, and a center post interrupting all of said walls centrally of said casting, said longitudinal vertical wall tapering from the ends of said bottom wall to the top of said center post, each of said ribs extending substantially from yend to end of said casting for straight line welding through said slots.

16. In a railway car underframe, a center sill of inverted U section having a plurality of spaced parallel longitudinal openings in the lateral webs thereof and reinforcing means therein in the form of an integral skeletal casting havingat each side thereof a plurality of spaced parallel ribs in alignment with said openings and weldable therethrough, whereby said casting may be welded in said sill along parallel straight lines, each of said ribs extending substantially from end to end of said casting, and an intermediate horizontal wall extending transversely with said casting and directly between corresponding ribs at opposite sides thereof.

- 17. In a railway car underframe, a'center sill of inverted U section having a plurality of spaced parallel longitudinal openings in the lateral webs thereof and reinforcing means therein in the form of an integral skeletal casting having at each side thereof a plurality of spaced parallel ribs each in alignment'with c'ertain of said openings and weldable therethrough, the lateral Walls of said casting being normally spaced from the Walls of said sill, whereby said welded ribs may afford the sole means of connecting'said casting to said sill.

18. In a car underframe, a center sill of inverted U section having spaced parallel slots, reinforcing means in'said sill in the form of an integral skeletal casting comprising spaced parallel ribs at oppositesides thereof'in alignment with said slots and Weldable therethrough, said casting also comprising a bottom wall and a transverse wall, said transverse wall extending through said casting directly between intermediate ribs at opposite sides thereof, the side draft lug casting therein comprising a plurality vof spaced longitudinal ribs spaced from the bottom wall thereof and aligned with longitudinal openings in the vertical webs of said sill, whereby said ribs may be welded to said sills in parallel longitudinal lines, the lateral walls of said casting being normally spaced from the walls of said sill, whereby said Welded ribs may afford the sole means of connecting said casting to said sill.

20. In a railway car underframe, a center sill of` inverted U section and reinforcing means therein in the form of an integral skeletal casting comprising a center post, spaced longitudinal ribs at opposite sides thereof in alignment with openings in said sills and weldable therethrough, and a transverse Wall extending between certain of said ribs, the side walls of said casting being spaced from the Webs of said sill, 'r

whereby said welded ribs form ther sole means of connection between said sill and said casting.

2l. In an underframe, a center sill having spaced side webs with parallel longitudinal slots, and an integral draft lug and center filler casting secured therebetween, said casting having side walls spaced from said webs and parallel longitudinal ribs therealong in alignment with said slots for welding therethrough, said' welding along parallel longitudinal lines affording the ,sole means of connection between said sill and said casting.

, 22. In an underframe, a sill having spaced side webs with longitudinal slots, and a reinforcing integral skeletal casting therebetweengsaid casting having -side walls spaced fromV said webs, Y

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