US2334073A - Car truck - Google Patents

Description

NOV. 9, 1943. CQTTRELL 2,334,073

CAR TRUCK Filed Feb. 13, 1941 2 Sheets-Sheet 1 i INVENTOR. io'berzifi CoZZfeZZ, @A

Nov. 9, 1943. R. B. COTTRELL 2,334,073

CAR TRUCK I Filed Feb. 13, 1941 2 Sheets-Sheet 2 L3 INVENT OR.

Patented Nov. 9, 1943 CAR TRUCK Robert B. Cottrell, Chicago, Ill., assignor to American Steel Foundries, Chicago, 111., a corpora tion of New, Jersey Application February 13, 1941, Serial No. 378,719

16 Claims. (o1.1o5 1s2) My invention relates to a railway car truck and especially to a novel form of four wheel railway freight car truck wherein each side frame structure comprises a composite assembly of a beam member and a truss type member, said truss type member affording-a central support for the trans- 'verse load carrying member or bolster, and wherein a composite spring group is arranged at each corner of the truck through which the truss typeside frame member is supported on the beam type member V An object of my invention is to devise a four wheel railway car truck of novel form wherein the spring suspensions are located adjacent the four corners of the truck instead of, as is more common, adjacent the transverse center line thereof. V

My novel car truck contemplates a side frame arrangement including a'lower beamdike element with integrally formed journal boxes and spring pockets adjacent the boxes as well as a trusstype side frame element on which the'bolster or load carrying member may besupported, and wherein said truss type member may be supported in part adjacent the four corners of the truck upon springs seated in said pockets and supported in part on an additional spring of different character, one end of which may seat upon inboard and outboard flanges E and 8', and'atopthe adjacent journal box and the other end of which may be afforded a seat at a spaced point in said truss member.

More specifically, my novel side frame arrangement contemplates a beam ide frame member with integral journal boxes and coil spring p'osi tioned on said beam member adjacent each jour nal box with a truss type sideframe element having its ends seated on said springs adjacent said boxes and affording over said coil springs seats for semi-elliptic springs, the outerends of Whichmay be seated on the adjacent journal boxes and the inner ends of which may be positioned in said truss member adjacent the bolster which is seated therein at the transversecenter line of the truck.

In one embodiment shown, I have illustrated my novel beam type side frame member as of boxsection which may conveniently be received within the superposed U-sect-ion tension member of the truss type side frame element, while in an of either of these arrangements in practical struc Figure 1.

axle assemblies I2, l2.

tures will depend upon'the particular-requirements to be met in each case. 1 i I A illustrated, ,Figure 1 is a side elevation of a truck embodying my invention. g Figure 2 is a fragmentary top-plan view, of the truck structure shown in Figure 1'. t Figure 3 is a sectional view through the true structure'shown in Figures 1 and 2 takenin a vertical plane bisecting, the truck transversely substantially as indicated by the line 3. 3"of railway car Figure 4 is a fragmentary sectional view-corresponding in general to the view of; Figure .3 but showing a modified form of section for the side frame members. In my novel truck, each side frame is' abuilt up structure comprising'a bottom beam member generally designated 2 of U-section (Figure'3) comprising'the bottom web 4 with upstanding posite ends of the beam member Ziare the inteusual means of connection to spaced Wheel and Adjacent each'jodrnal box' the inboard and'outboard vertical flange 6 and 8 of the beam member are increased to a d8pl;hjcOII8SpOlfldilflg substantially to the depth of the journal box; said inboard and outboard deepened flange portions being indicated respectively l4 and I6 and forming the side walls of {a spring pocket adjacent each journal box','the bottom of said pocket or spring seat I8 being defined by the web 4 of said beam member. The top wall of each journal box may be inwardly extended as at 20 to merge with the downturned web 22 which affords abutment as at 24' for the endofthe truss side frame member generally designated 26, and each end of th'e'tru'ss member 26 may sea v as at 28 upon the spring group diagrammatically indicated at 30, said spring group being positioned on the beforementioned spring seat l8. The margins of the spring seat l8 may be defined by'transverse flanges 32 and 34 upstanding from the bottom web 4.

As already indicated, the top side frame member 26 is a truss structure including the compression member 36 and the tension member 38 merging with integral spaced columns 40, 40 to form a central bolster opening 42 and the spaced window openings 44, 44, said tension and compres- 1 relatively wide to accommodate the laterally projecting inboard and outboard vertical guide lugs 46 and 48 on the bolster 49, said lugs; when said bolster is seated in normal position in the relatively narrow portion at the bottom of the bolster opening, having engagement with the col-, umns, said lower portions of the columns being afforded bolster guide surfaces for engagement with thesideiwalls oi the bolster as indicated at 50, 50. The:bottomiwail ofithe {bolster end is slightly convex longitudinally of the truck as best seen at 52 (Figure 1) in order, to permit slight rocking thereof with respect to the tension mer'n ber 38 onewhich it is seated as at 54,, andlth'e. bottom wall of said bolster end is formed with downwardly projecting inboard i and ,outbbardx horizontal guide flanges 56and'58 which may abut the inboard and outboard edges of. the tension member 38. The tension memberbeneath'.

said bolster opening may be formed.as-a;boxsection with a top web 60, a bottom web 62, and

I inboard and outboard walls 64 'andf66",?saidboxsection being sufiicientlyinarr'ow to permit Fvertical movement thereof betweenithe; upstanding fl'angesland '8- of the lower side framefmember 2. Thebolster 49 1s:a structure imusual form or 'b'ox-sectton 1 comprising i the center; bearing 6 8 and spaced side bearings; .10; lot-and; in- :the embodiment shown, has side wallscoredv away as at '1 no accommodate thetpassage 20:1 brake 'rods.

' Adjacent eacli'icoiumn 'andon the inboard face.

of feach rtrusslmenrber may: be formed: the usual brake hanger brackets 14, I4, and withim each column may be 'ziormed' a' horizontal? web 16 with i I an 'arcuate' top "surface? w deflningaspring :seat

for 'one endxoi the semi-eliipti'cspring lfiiwhich extends through the open end ofythebOX-selitiOn end'tportion' and is afiorded fa seat 1 at its opposite and atopzthbdoumabbox as at 82.: The semiguide surfaces are-- formed on: the-inner,- opposite faceaofithwfia'nges l4-and l6 .as a t 188 and 90 forrengagement-with the: guide surfaces or chafingfsuriaces 92 and 94-: formed on 1 the inboard and cutboardswalls of the-:trusssmember. 251M;

the extremities thereof.

, r The modification illustrated in Figure 4 difiorsirom that already;- described in: :that ;-thebeam side frame -member- 102* is of relatively narrow boxesection rso thatjait may be* received between the downturned inboard and outboard: flanges ilk-and? I062 of the "inverted' u soction :tension member generally designated I08 of= j-ths truss sido==frame member which otherwise-.similapto the rstnucture of theiprevious modification. in:

I them'odification 'now under consideration, the

too'webd ll-of-the tensionmember 108 afiords ase'at as -at III for the-bolster Wh'ichQis formed with inboardtandeoutboard vertical guide lugs H6 ands] l8-.-for. engagement 'withthe col-r umns. illas YWuflS hOrlIOnta1-inb08|Ed and outboardguide iugssiu, and 410:: engagement with the. inboard and. outboard. faces of the. tem

'sionmember I08... Inthi's modification likewise, may be formedtheusuallbrake hanger bracket I26 merging. with the. compression member; i 284st its juncture with the column .I 20.

shown in Figure {4, the box-.section beam member. llIhmay bereceived. between the side flanges of -'the:tension. member I GET-when normal.-

relative vertical movement occurstherebetween. It is to be understood that I do not wish to be limited by the exact embodiments of the .de-

vice shown which are merely by way of i1lus-.

- tration 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 therspirit of the inventiomg; the scope 'of .the

claims. 'x

I'claim? 1. In a railway with integral journal boxesat the lends thereof spacedacolumnsidetming a bolster opening, said tension .member being receivable between the.

spacedwebs of said U-sec'tionand said tension n w n e sl m mhrrswmsms rm' and spring seats adjacent said boxes; coilsprings 7 on said seats,- a truss'sideframe velementsuperposedhn'said beam element and including a ten- 1 sion member, *a' compression ime mber, and

tion at w flidvtmsaelementmm t ndin to d. m nnows-with 1 d n al: s am. Wi 8 and. sa onm mhfl v mwqlh ewrm em nt a n its e d meow v S r n 7 a na l n' r eren mway car truck' comprising a'lower a with integral journal b'oxes'at the eaarmeior U and'spring seats adjacent 'said boxeaiofiirpfliigs i t r esMe Me their oppositecnds positionedebn saidbow 55 said beam portion with its-ieittre'mities F their o o n m ifl md ea has termediate points affording supportm of; said truss element, and mboard and ,biigaqaia framecomprisinga U-section beam element, t g 'io b a-L b a r m swarm-e spring: seats adjacent saidrboxes; a

is d ea re s j e; r 011 b mi :1 miefi mm e b a m meoa 5 um efi w o member being. receivable; jbatween l tbocsgaced webs 'PUfMt se war compression mb ma s-1m at the-endsof ,a hoist-cr es tending into said. bolster opening andhorizontal guide lugs and saidtens'ion veiigsgia tm s element having. its ends suppoited dn gsaidlcoil springsand additional y supported n;. .s mielliptic springs aid seml gllibticllsmfiliss, B5331 adjacent ends seated. i sa nd 3 termedi'ate points affording rapport;iif fthfetfs of said truss'elementg.

3; A composite side trame stmchire a; a

on said seats, and a truss portion "sii on said coil fsp'rin'gs',--s'aid truss portion comprising tension and compression members and s'pao'd columns defining a boister 'o enmg, spring cats. in; said columns, 'springs ofi'iifierent' character having their opposite endsseatcd on's aid 7 their adjacent 'endsseated ili'jSilMiMfMd intermediate. points. aflording addibimai m for the extremities of :said trussiporttonamh journal box having a wall extended. tomergseflith 5 atransverseweb formingan'abutment-for one end of said truss portion to limit relativelongitadinal movement between truss portion apdswsaid car truck, a composite side p frame comprising a U-section beam element their" he n -en s bolster openin earns comprising tension i and fcomp'ress'ion members and spaced columns defining a bolster opening, spring seats in said columns, springs of different character having their opposite ends seated on said boxes and their adjacent ends seated in said columns, and intermediate points affording additional support for the extremities of said truss portion, each journal box having a top wall extended to merge with a transverse vertical web forming an abutment for one end of said truss portion to limit relative longitudinal movement between said truss portion and said beam portion.

5. In a four wheel railway car truck, a composite side frame comprising a beam element with integral journal boxes and spring seatsadjacent said boxes, a truss element comprising a compression member, a tension member, and spaced columns forming a bolster opening, a bolster end seated on said tension member in said opening, springs on said spring seats affording support for the ends of said truss element, springs of different types having their opposite ends seated on said journal boxes, their adjacent ends seated in said columns, and affording additional spring support for said truss element, and

, 6. In a side frame for a railway car truck, a lower element with journal means at the ends thereof, an upper element,-resilient means supported from said lower element adjacent respective journal means and affording support for said upper element, and a pair of leaf spring assemblies spaced longitudinally of the frame, said assemblies being supported at the ends thereof adjacent each other from spring seats associated with said upper element and said assemblies be-' ing supported at the ends thereof remote from each other from respective journal means, each of said assemblies affording support intermediate the ends thereof for one end of said upper element.

'7. In a composite side frame structure, a beam member having journal boxes, inboard and outboard flanges adjacent said boxes defining spring pockets, coil springs in said pockets, a super posed truss element with box-section ends seated on said coil springs, spaced spring seats in said truss element, and semi-elliptic springs having their opposite ends seated on said boxes and their adjacent ends engaging said spaced seats in said truss element and affording additional support therefor, said inboard and outboard flanges affording guide surfaces for the extremities of said truss element.

8. In a composite side frame structure, a beam member having journal boxes, inboard and outboard flanges adjacent said boxes defining spring pockets, coil springs in said pockets, a superposed truss element with box-section ends seated on said coil springs, spaced spring seats in said truss element, and semi-elliptic springs having their opposite ends seated on said boxes and their adjacent ends engaging said spaced seats in said ,trus's,"element and affording additional support therefor, certain Walls of said journal boxes being extended to; formabutment means for the ends of "saidtruss element.

, 9. .A composite sid e frame structure for a railway cartruckcornprising a lower beamportion 'with integral Ljournal boxes at the ends thereof and spring seats adjacentsaid boxes, coil springs on'sa id seats, anda'truss portion superposed on ,s'aid "beamportion ith its extremities seated on said 'coil", springs, said, truss portion comprising tension and compression members and spaced columns defining a bolster opening, spring seats in said columns, springs of different character having their opposite endsseated on said boxes and their adjacent ends seated in said columns, and intermediate points affording additional support for the extremities of said truss portion.

10. In a four wheel railway car truck, a composite side frame comprising a beam element with integral journal boxes and spring seats adjacent said boxes, a truss element comprising a compression member, a tension member, and spaced columns forming a bolster opening, a

bolster end seated on said tension member inv said opening, springs on said spring seats affording support for the ends of said truss elements,

and springs of different type having their opposite ends seated on said journal boxes, their adjacent ends seated in said columns, and affording additional spring support for said truss element.

I 11. In a side frame structure for a railway car truck, a beam having journal boxes at the ends thereof and flanges defining spring seats adjacent said boxes, springs on said seats,a truss having open ends seated on said springs, spaced spring seats in said truss, and semi-elliptic springs at opposite ends of said side frame structure engaging said spaced seats respectively at their adjacent ends and having their remote ends seated on said boxes, said flanges affording guides for the ends of said truss, certain walls of said boxes being extended to form abutments for the ends of said truss.

2. In a side frame structure for a railway car truck, a beam having journal boxes at the ends thereof and spring seats adjacent said boxes, springs on said seats, a truss having box-section ends seated on said springs, spaced spring seats in said truss, and semi-elliptic springs at opposite ends of said side frame structure engaging saidspaced seats respectively at their adjacent ends and having their remote ends seated on said boxes, flanges onsaid beam affording inboard and outboard guides for the ends of said truss, and abutment means on said beam for said boxsection ends.

13. In a side frame for a railway car truck, a lower element with journal boxes and spring seats adjacent thereto, resilient means on said seats, an upper truss element comprising spaced columns defining a bolster opening, said upper element being seated on said resilient means, and semi-elliptic springs seated at their opposite ends on respective boxes and seated at their adjacent ends in respective columns and affording additional support for the ends of said truss element.

14. In a side frame structure for a railway car truck, a beam having'journal boxes at the ends thereof, spring seats adjacent said boxes, springs on said seats, a member having ends seated on said springs, spaced spring seats in said member, and semi-elliptic .spfinzs rah 0W0..-

' ends of said side; Ira-me structure ensuing sal'id spaced i s'eats f-IeSpcfiVGIY; at -,their adlaent ends, having their remotel ends,sea'ted 01131851160?- tive boxes and affording suppprt' intermefliatb ,t heir ends fonsaid membei;

15. composite side frame ildfiver beam element with inte'zral jqaurnal bqxs and 7 spring seats adjace'ntsaid boxes, coiLsnringsjiOn 1 said seats, a. r element vsuperposed Tqn sald belster opening, springseats in saidlcnliumns, and semi-elliptic springs having their. oppos1te;ends seatedIon saidmoxes andtheir gdjapentends V 16. In a. side frame structufe toif a means, springs on said seats-,a truss havlng'ends seated'on said springs, spaced, s'p'rlngjseam1n said; truss, and, semi-elliptic spnngs alfqrdmgifaddl tiopal sunpbrt 191* zandfenggglng said spaced'seats respeetlvely at their;

endsAand having, their e t e 's at qx s d Eda a.

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