US1748238A - Cast-steel side frame - Google Patents

Description

Feb. l25., 1930.

M H. MARTIN CAST STEEL SIDE FRAME Filed July 18, 1925 2 Sheets-Sheet l Feb. 25, 1930. M. H. MAR/TIN cAs'T STEEL SIDE FRAME Filed July 18, .1925 2 Sheets-Sheet 2 E@ 5% 7m f m m ,w @M J 6 6 J a a y Patented Feb. v25, 1,930

` UNITED STATES PATENT oFFlcE MARKH. MARTIN, OF BALTIMORE, MARYLAND, ASSIGNO TO THE SYMINGTON' COMPANY, OF NEW YORK, N. Y., A CORPORATION OF MARYLAND casar-STEEL sinn FRAME Application led July 18, 1925. Serial No. 44,566.

This invention relates 'to side frames for railway car trucks and more partlcularly to frames having journal boxes integral therewith. J

The principal object of my linvention, genwith respect to each other that erally considered, is the provision of cast integral side frames in which the various members thereof are so designed with respect to the cross-section and so arranged eat strength, compared. with the weight thereof, is secured.

An object of myinvention is the provision"` of a cast side frame for railway trucks in whichthe various members thereof are so designed and the cross-sections thereof are so varied that the most economical cross-sections are employed in the various positions on the .frame and for that purpose the crosssections of one or more'of the members thereof varies radically between the ends thereof wherebywaluable results such as lightening theweight of the frame without sacrificing the necessary strength thereof, are secured.

Another object of my invention is the provision of a cast side frame for railway car 4trucks formed with a compression member, v theintermediate portion of which is channelshape0 and the end portions of which are5 gradually changed to a T or I shape, a tension member, the central portion of which is box-shape, and the end portions of which are formed as inverted channels with upstanding v. ribs from 4the webs thereof, said members being spaced by bolster column or strut portions, mergingl at their lower ends with the upstanding ribs on the tension member and at their upper ends with intermediate portions of the compression member.

A further object of my invention is the provision of a cast side frame for railway car trucks formed with compression, tension and bolster column members, said bolster column members spacing intermediate portions of the compression and tension members and merging therewith, said frame being formed with a bolster opening framed by said members, the compression member above the bolster opening being formed asachannel in cross-section, the tension member beneath the bolster opening being box-shape in crosssection, the vbolster columns being channelshape in cross-section, said compression member uniting with theU tension member and with journal boxes at the ends of the frame, said frame being substantially I-section above the journal boxes, those portions of the tension member diagonally disposed between the journal -boxes and the lower corners of the bolster opening being formed as inverted channels with ribsv or I sections rising from the backs of the channel webs.

A still further object of my invention is the provision of a cast Side frame for railway cartrucksy formed with compression and tension members and bolster column or strutl `members spacing intermediate portions thereof, said tension member vbeing formed as a box-section joining the lower. portions ofl the bolster column members and as` an inverted channel-section extending' 4diagonally'upward from the lends of said ,box-section, the transverse web of said diagonal portions extending in alstraight line' from the lower corner of the bolster opening to the corner of the adjacent journal box roof, the depending iianges of the section extending from the box-section beneath the bolster opening to the side walls of thejournal. boxes, said diagonal tension portions being formed with longitudinal, central rib portions rising from the backs of the transverse web `portions thereof, merging with the bolster column portions at their lower ends and .with the web of the compression `rmember at their lupper ends.

Figure 3 is a cross-sectional view on the line 3 3 of Figure 1, looking in the directiony 5 o-f the arrows.

Figure 4 1s a detail cross-sectional n the line 4 4 of Figure 1.

Figure 5 -is -a detail cross-sectional view on the line 5 5 of Figure l.

Figure 6 is a similar cross-sectional view on theline 6-6 of Figure 1.

Figure 7 is a partial cross-sectional view on theline 7 7 of Figure 1.

Referring to the drawings in detail, in which similar reference characters designate like parts, there is shown a cast side frame 1 which, in tlieembodiment illustrated, comprises a compression member 2, a tension member 3, bolster column guide or strut niembers 4, vand journal boxes 5. The compression and tension members unite at the ends thereof and are also preferably integral with the journal boxes 5. Intermediate portions of the compression and tension members yare spaced by the bolster column members 4 which are shown as integral therewith.

The various frame members are formed of varyingsectional configuration in order to secure great economy of material without sacriview ficing requisite strength'in the frame. For

example, the compression member 2, vover the bolster or window opening 6, isfformed 'of inverted U-shape or as a channel withl an` upper web portion 7 and depending flanged portions 8. The lower edges of said flangeportions 8 are preferably beaded or provided with outstanding rib portions v9. f

After passing outwardly beyond the bolster opening, the cross-section ofthe compression member changes gradually so that over the journal boxes the section is substantially T. or I shape with an upper flange 10 curved downwardly and meeting the roof 11 of the journal box substantially iii line With therouter brass'- lug 12. That is, the upper edge, whichchanges from a web 7 to a flange 10, slopes from a horizontalltosrlbstantially a vertical position where it joins with the journal box 5. f

The web 13 of the T or I section over the journal boxes merges with the roof 11 of eacl'i journal box, as illustrated. During the transition from a channel to an I section the depending flanges 48 of the compression mem- From the foregoing it will be apparent member.

tially horizontal beam, rectangular or -boxshape4 in cross-section.

Adjacent the 4opposite lower corners of the bolster opening, the lower web 15 of the box-shaped horizontal portion of the tension member 3 is provided with openings which gradually increase or taper in width; the edges of said openings foiming inwardly extending tapering flanges 16 on the depending webs or flanges`17 of ythe tension The outer portions of the tension nieniber, that is the portion between each journal box and the adjacentstrut, are bent upper webv 18 thereof is,continued straight to join the journal boxes 5 adjacent the upper inner corners thereof and preferably at the junction of the inner brass lug 19 with the roof 1l. It willtherefore be apparent that the main portions of the tension member 3 change from/boX-section to inverted channel-sectioninpassing from that portion beneath the bolster opening 6 to the journa boxesv 5.

The bolster column portions 4 are formed of substantially U or channel 'shape in crosssection with web portions 2O forming bolster guides and outwardly extending flanged portions 21 beaded or vribbed at the edges thereof, as indicated at 22. The lower portions of the web 20 are outwardly offset, at 23, as is usual, to facilitate the insertion of the bolster, and apertured at 24 for core removal. The flanges 21 adjacent the lower portions thereof are converged toward each `other and finally joined at 25 and continued .as a single web or flange 26 upstanding and centrally longitudinally disposed along the transverse ,web 18 of the diagonal portions of the tension member 3. The upper edge of this web or flange 26 is bounded by the flange or bearing 14 continued from the compression member 2. n

It will thus be apparent that the lower portions of the bolsterv column members 4 merge withY the transverse web 18 of the diagonal portions of the tension member 3 and are continued to form an extension or additional T or I'section joined with the iny or sloped outwardly and upwardly and the o verted channel section thereof. The upper v ends of the bolster column members 4 merge with the lower portions ofthe compression member 2, the Webs 20 of said bolster column portions' 30of the spring seating portion 28,

portions bei upper ends an the opposite portions thereof gradually tapering or decreasing in width so as to fina ly mergefwith. the depending flange 8 of the compression member oven the bolster opening.

A he flanges 21 of the bolster column portions mer e with the flan es 8 of the com ression' mem er 2, the beading 9 thereon, owever, preferably extending above the upper ends ofthe bolster column members and merging with the beading 22 at the ends thereof. l Said beading22 at its upper end is preferably' curved outwardly and continued around the triangular openingsy 27 to form an integral framing therearound withvthe beading 9 and 14.

The upper web 28 of the tension member beneaththe bolster opening 6 is preferably formed relatively wide for the accommodation of the bolster springs. A plurality 'of b osses 29 may also be provided thereon. The

extending-beyond the depending web portions 17, are referably braced with respect thereto by triangular reinforcing webs 31. An aperture. 32 may be provided adjacent the centralportion of the web for removing the core from the box section therebeneath.

Thelower flange portions ofthe tension member adjacent the lower.y corners of the window opening' 6 are preferably curved outwardly and upwardly, as illustrated, to give adequate strength beneath the window opening corners. The lower-edges of the tension member 3 are then continuedsubstantiallyparallel, but slightly converging with respect to the transverse web 18 thereof, to

the -vicinit of the adjacent journal box where the epending flange portions 17 are ared downwardly and joined with the journal box inner wall 33, as illustrated.

Triangular reinforcing webs 34 may be provided between the'outer edges of the tensionmember web 18 and the upperV mner corners of the journal boxes 5.

Brake hanger brackets 35 2', as illustrated, said brackets, in the present embodiment, being provided withupright y ber 2 and upper flange portions 37 gradually increasing in width toward the 'compres- "sion member 2, `and finally merging therev 'with. The lower flange 38 of the brakehan'g- 7er bracket 35 may be extended and joined with the lower edges or beading 9 of said adjacent flange 8 of th compression mem- The` compression member 2 is preferably of lighter section than the tension member because it carries less stress than said tension member and the inner flanges 'of all members arepreferablyformed thinner than the bifurcad. adjmtrtheirl 'the strength thereof.

Having thus described my invention, I'

may be integrally united with the compression member correspondin `"outer anges thereof, The

the front portion. Unless provision is made to take care of the difference in quality between the metal first poured an'd that subse- Yquently poured, the front and rear anges will have different strengths per unit area and in service there would be a tendency to stress the outer flanges of the frame to a greater degree in proportion to their strength than the inner flanges. By providing flanges of unequal thicknesses this defect has been obviated so that the side frame is provided with opposite flanges of uniform strength.

In view of the foregoing disclosure it will be appreciated that I have devised an im- .proved form of side frame in which the sections of thevarious members are varied in shape and strength to eiiiciently take care of the stresses which they are called upon to bear in service, whereby great economy in design is secured and the weight of the frame reduced without deleteriously decreasing claim:

1. A. truck side frame comprising a tension member, a compression member, boli' I ster guide columns interposed between intermediate portions of said memb'ers and leaving a bolster opening therebetween, olirnal boxes at the ends of said frame, the tension member beingI formed ywith diagonal end portions having transverse web portions extending below the upper edge thereof from the lower corners of the bolster opening to the roofs of the journal boxes, said web por-` tlons beingl formed with depending flanges extending from beneath the bolster opening tothe journal boxes.

2. A truck side frame comprising a tension member, a compression member, bolster guide columns linterposed between intermediate portions of said members and leavingl a bolster opening therebetween, journal boxes at the ends of. said frame, the tension member being formed with diagonal end port-ions having transverse web portions extending below the upper edge thereof from the lower' corners of the bolster opening to the roofs of the journal boxes,` said web portions being formed with ldepending flanges vextending'from beneath the bolster opening tothe journal'boxes, the intermediate portion of the tension member; beneath the bolster opening beingsubstantially rectangular in Vcross-section, with .the side walls I thereof formed as continuations of said de pending flanges.

3. A truck side frame comprising a tension member, a compression member, bolster guide columns interposed between intermediate portions of said members and leaving a bolster opening therebetween, journal boxes at the ends o f said frame, the tension member being formed with diagonal end portions having transverse web portions extending from the lower corners of the bolster opening to the roofs of the journal boxes, said web portions being formed with depending flanges extending from beneath the bolster opening lto the journal boxes, and with upstanding portions merging at theirf lower ends with tbe bolster guide columns and at their upper ends with the compression member. o

'4. A truck side frame comprising a tension member, a compression member, bolster guide columns interposed between intermc; date portions of' said members and leaving a bolster opening therebetween,n journal boxes at the ends of said frame, the tension member being :formedv with diagonal end portions having transverse web portions extending from the lower corners of the bolster opening to the roofs of the journal boxes, said 'web portions being Vformed vwith de pending flanges extending from beneath the bolster opening to the journal boxes and with iipstanding central longitudinal web portions, flanged at their upper edges, said web portions being continued at their upper lends as web portionsv of the compression :member and attheir lower ends bifurcated and continued as flanges of the bolster columns.

5. A truck side frame comprising a tensioninember, a compression member, bolsterl guide columns interposed'between iiitermediate portions/of said members and leaving a bolster opening therebetween, journal boxes at the ends of said frame, the tension member being formed with diagonal end portions having transverse web portions extending from the lower corners ofothe bolsteropening to the roofs of the'journal boxes, said web portions being formed with depending flanges extending from beneath the bolsteropening to the journal boxes, and with opstanding central longitudinal web portions formed with transverse fianges at their -upper edges, said fianges being continued attheir upper ends as lower flanges of theA compression member and at their lowerends biurcated and continued as beading on the bolster columns. v 6. A truck sidenframe comprising la ten- -sion member, a' ycompression member, bolster guide columns interposed between interinadiate -portions of said members and leaving a bolster opening therebetween, journal boxes at Athe ends of said rame,'the c ompressionmember at the intermediate portions thereof .over the bolster opening being generally 4channel-shape in' cross-section, vwith ay transverse webA and flanges on either side thereof, said flanges,.bey0nd the bolster ope..- ing', gradually converging from 4the sides of the web and uniting along the full height thereof to form upright web portions over the journal boxes.

7. A truck side frame comprising a tension member, a compression member. bolster guide columns interposed between intermediate portioiis of said members and leaving a lbolster opening therebetween, integral journal boxes at the ends of said frame, the compression member at the portion thereof over the bolster opening being .generally channel-shape in section, with a transverse web and depending fianges on either side thereof, said flanges, beyond the bolster opening, gradually converging beneath the web. united to foi-in upright web portions and continued to the journal boxes and as web.

portions of the tension member.

8. -A truck side frame comprising a tension member, a compression member, bolstery guide columns interposed between intermediate portions of said members and leaving a bolster opening therebetween, journal boxes at the ends of said frame, the compression member at the portion thereof over the bolster opening being generally*channel-shapel in section, with a transverse web and depending flanges on either side thereof, said flanges, beyond the bolster opening, gradually converging beneath the web, united to form upright web portions and continued to the journal boxes and as web portions of the tension member, the web of the channel sertion gradually forming upper flanges on the upright web portions which 'curve downwardly and unite at their ends with the journal boxes.

9. A truck side frame comprising a tension l v tion being beaded, finally uniting adjacentv ange por tions and continued as upper fianges of the the ends of the frame, as single tension member.

10. A truck side frame comprising a ten# sion member, a compresion member, holster guide columns interposed between intermediate portions of said members and leaving a bolster opening therebetween, journal boxes at the ends of said frame, the tension member being formed with diagonal end portions,

inverted channel-sha e in cross-section, with an upstanding riba ong the upper surface .5 of the transverse channel web, said web extending in a straight line, along each end portion, from a lower corner of the bolster open-in to the inner corner of the adjacent journa box roof.

11. A truck side frame comprising a tension member, a compression member, bolster 'uide columns interposed between intermeiate portions of said members and leaving a bolster opening therebetween, journal boxes at the ends of said frame, the tension membe'r being formed with diagonal end portions, in-

verted channel-shape in cross-section, with an upstanding rib along the upper surface of the transverse channel web, said web exgo'tending in a straight line, along each end portion, from a lower corner of the bolster opening to the inner corner of the adjacent journal boxroof, joining 'with said roof adjacent the junction of the inner brass lug therewith.- l

12. A truck side' frame comprising a tension member, avcompressionv member, bolster guide columns interposed between inter- 7 mediate portions of said members and leaving a bolster opening therebetween, journal boxes at'the endsof said frame, the tension member being formed with diagonal end portions, inverted channel-shape in crosssection, with an upstanding rib along the upper surface of the transverse channel web, said web extending in a straight line, along each end portion, lfrom a lower corner of the bolster opening to the inner corner of the adjacent journal box roof, the depending iianges 4o of the channel-section extending from ben eath the bolster opening to the outer end of each diagonal portion of the tension member where they are flared downwardly and united with .the inner walls of the journal boxes.

-13. A truck side frame comprising a tension member and journal boxes' integrally connected thereto the end portions of said "tension member being diagonally' disposed and comprisin lan intermediate web portion with 'upright angesv extendin one way and a sin le u right ilange exten ing the other wayterelom 14. A truck side frame comprising a ten- `5 sion member formed with a substantially hori izontal intermediate portion and diagonally disposed end portions, said end portions being-formed with a transversev web .from which depend a plurality of flan es and the upper surface 'of which 1s forme `with a single up standing a'nge. v 15. A truck side frame comprising a tension member'having diagonally disposed end ortions, 'the up ner portions of which are `.65 ormed--g'enerally shape in cross section and upper web extending beyon the lower portions of which are formed gen erally channel shape in cross section. A

16. A truck side frame comprising a. tension member having diagonally disposed end portions formed with a transverse web, the outer edges of which are provided with depending flanges and the intermediate portion f which is formed with an upstanding ange.

17 .4 A truck side frame comprising a compression member, the central portion of which is generally channel shape in cross section and the end portions of-which are generally T shape in cross section, said member being formed so that one section gradually merges into the other.

18. A truck side frame comprising a compression'member formed with an intermediate portion substantially U- shape in cross section, the flanges of the U graduallyfconverging towards the ends of the member to form a single web along the 4full height of said member, the web of the U being continued to form a flange .on the single web portion of the member.

19. In an integral side-frame-journal-box structure for car trucks, a side-frame having a top com ression member and a bottom tension mem er, said frame members being 0f channel form in the main part of the frame o5 intermediate the journal boxes, and being of I-section at and 1n the neighborhood of the journal box.

20. In an integral side-frame-journal-box structure for car trucks, a side-frame having a top compression member and a bottom tension member, said two members in the main part of the frame intermediate the journal boxes being of channel form including horizontal webs and vertical langes, the horizontal web of the top member joming the to of the journal box and the horizontal web o the bottom `member oining the'inner wall 'of the" journal box, an the vertical flanges of one of said members converging towards each other tojoin at points spaced inwardly from the journal boxin a vertical web whlchvexvtends from the top wall of said boxes.

21. A side frame comprisin a tension member formed with norma y vertical flanges connected at their lower edges by a web, said tension member having a central ortion with an the sides of the anges to provide a spring plank seat, and upwardly and outwardly' extending end pertions, the upper web of said intermediate portion beyond the sidesl thereof being continued upwardly and outwardly along the end portions below but parallel to the upper edges of said end portions, the lower edge of said tension member where each end portion joins the central or intermediate ortlon bemg first concave downwardl an then convex downwardly for maintaining the depth 1go or intermediate horizontal of the member at said 'un'ctions to correspond with the depth of the intermediate portion. n

22. A side frame comprising a tension member formed with an intermediate siibf uv stantially horizontal portion and end portions extending diagonally outward and upward therefrom, bolster guide 4columns ex- 4tending upward from the junctions of the end and intermediate ortions of said mem- 13 ber, said tension mem er comprisinga pair of normally vertical flanges, the lower outline of which is curved first in one direction and then in the other beneath each bolster guide column for maintaining the depth of 15 the tension member to correspond with that of the horizontal portion thereof to beyond the junctions with said guide columns, said tension member between the guide columns having an upper webextended laterally beyond the anges with the ends continued diagonally upward and outward below but parallel to the upper edges of the diagonal end portions of sa1d member.

v In testimony whereof I aiiix my signature.

f MARK MARTIN.

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