US1741188A - Car frame - Google Patents

Description

Dec. 31, 1929. G, s, GOODWIN ET AL CAR FRAME 4 Sheets-Sheet 1 Filed Feb. 27, 1928 Dec. 31, 1929.

t G. S. GOODWIN ET AL CAR FRAME Filed Feb. 27, 1928 4 sheets-sheet 2 waff Dec. 31, 1929.

G. s. GOODWIN ET AL CMR FRAME Filed Feb; 27,1928

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CAR FRAME Filed Feb. 27. 1928 4 Sheets-Sheet 4 *i b f 11 5 N l *i N kn s :1/0 Umiv Patented Dec. 31, 1929 UNITED STATES PATENT loi-FlcE GEORGE S. GOODWIN, OF CHICAGO, ILLINOIS, AND WILLIAM J'. .'IOIIJEHEUION, DECEASED, LATE F CHICAGO, ILLINOIS, BY CLARA I-I. TOLLIERTON, IEXECUTRIX, OF CHICAGO,

y ILLINOIS CAR FRAME Application filed February 27, 1928. Serial No..257,428.

rIhis invention relates to improvements in fabricated steel structures, and more particularly to structural frames used in locomotive tenders, although, as will hereinafter appear, the invention is not necessarily limited to such use.

Locomotive tender frames have heretofore been made up of many pieces bolted and riveted together, while more recently such frames have been made in integral or one piece castings. However, it has been found that as the size of tenders and their frames increased the one piece steel tender frame castings have become somewhat too heavy and unwieldy to be readily moulded.

We find it desirable to form the end frame members only, which include the bolsters and adjacent end sills. of integral castings, and connect such end frame members together by relatively light structural steel sills. This latter type of construction aifords a very substantial saving in the cost of relatively long tender frames and furthermore, lends itself to standardization far more than the one length of frame can be constructed` by simply varying the length of the connecting sills.

Our present inventiony consists broadly in providing integral end frame castings connected together by lighter structural steel sills, as above described, and more specifically relates to improvements in methods for connecting castings to the structural steel member by autogenous welding so as to overcome the diiiiculties heretofore encountered, on the one hand, by ordinary riveted connections, and on the other hand, by ordinary welding methods, which are especially liable to give unsatisfactory results where relatively light formed or rolled steel sections are welded to heavier cast steel sections. Accordingly, in the present invention we utilize an improved form or type ofwelded connections, having as their chief characteristic that the piece casting, inasmuch as any reasonable weld is so disposed as to be in compression or shear, rather than tension, in a direction longitudinal of the connecting sills or beams, p

It willbe seen further that our improved forms of welded connections are particularly adapted for use in tender frame constructions such as herein contemplated, but is also capable of wide application over other forms of fabricated steel structures.

The invention may best be understood by reference to the accompanying drawings, in which Figure 1 is a plan view of a tender frame made up of integral end ,frame members joined together by intermediate connecting sills in accordance with our invention.

Figure 2 is a side View of the frame shown in Figure l.

Figure 3 is an enlarged section taken on line 3 3 of Figure 1.

Figure 4 is an enlarged fragmentarysection of the form of sill shown in Figure l, showing details of a preferred form of welded joint between the end frame and the central connecting sills.

Figure 5 is a sectional View taken on line 5-5 of Figure 4.

Figure 6is a section taken on line 6-6 of Figure 5. j Figure 7 is a plan view of a modified form of joint somewhat similar to that shown in Figure 4.

Figure 8 is a side view of the joint shown Figures 11 and 12 are top and side viewsV respectively of still another form of welded section employing a single H-beam section as ythe center sil j Figure 13 is a plan view of another forIn in Figure 13.

Figure 15 shows another form of Welded connection for double center sills formed of two channel-beam sections.

Figure 16 is a side view of the connections shown in Figure 15.

Figure 17 is an enlarged sectional viewtaken on line 17-17 of Figure 8.

Figure 18 is an enlarged sectional view taken on line 1818 of Figure 9.

Figures 19 and 20 are top and side views respectively of a welded joint suitable for a bolster and side sill, utilizing our improved form of welded joint.

Figure 21 is a section taken on line 21-21 of Figure 19. i

Figures 22 and 23 are sections showing modified forms somewhat similar to Figure 21, wherein the side sill consists of an inwardly turned channel member.

Figure 24: is a modified section somewhat similar to Figure 21, but wherein the side sill consists of an outwardly turned channel member.

Referrin now to details shown in the drawings, igures 1, 2 and 3 show a tender frame which is made up of twoend frames indicated generally at 1() and 11, and separate connecting means therefor herein in- ,cluding a pair of longitudinal center sills 412, 12'and side sills 13,l 13. vIntermediate transverse supports 14, 14 may also be prolvided. v Each of the end frame members includes end sill 15 and bolster 16 connected by 'a center member 17 carrying draft connections of suitable construction, all being formed in an integral casting. The center connecting sills 12, 12 an 'd side sills 13, 13 are preferably of standard structural steel forms, as shownherein,.the center sills being of H|beam construction, while the side sills 13 are of channel sections. The center sills 12, 12 are suitably secured to inwardly projecting supports 18, 18 carried bythe end frame members 10 and 11.

While our invention broadly includes the use of rivets for connecting the sills to the end frames, as indicated at 20, 20 in Fig- -'ures 5 and 8, we prefer to utilize an improved form of welded joint, inasmuch as it is found that the enormous stresses set up at thesepoints of juncture due to constant pulling and bufing transmitted through the draft gear, (of which the longitudinal sills form a part) is likely in time to loosen any ordinary riveted connections, with an ultimate tendency to shear the rivets. Accordingly, in the preferred forms shown in most of the detailed carried by the end frame each have their I outer faces 25 shaped to fit against the upright web 26, and between the upper and lowsL er flanges 27 and 28 of the I-beam sectionsy 12. A plurality of bosses 30, 30 (herein in a double row) are formed on the outer face of wall 25 and projecting through apertures 31 formed in the web 26 of each sill 12. The joint thus ma'de is welded together about the lugs 30, as indicated at 32, so as to produce a homogeneous structure in continuous lines about each one of the lugs 30. As will be seen in Figure 6, this form 'of joint is extremely strong inasmuch as it is capable of resisting all stresses in a direction longitudinally of the beams 12, or transversely of the lugs 80, without imposing undue stress upon the Welded portions of such joint, since the welded connections are undercompression or shear on the side from which pressure is applied, so that t-he joint will be secure even though the lines of weld crack about one or more of the lugs, as is often the case with welded joints, even though done in the most careful manner, an'd especiall where, as here, the two pieces being we ded are of different thicknesses and physical properties so as to be especially subject to warplng or cracking after they have cooled.

It will therefore appear that the welded joints aboutlu s 30, 30 are designed to carry the major portion of the load. Other welding may also be utilized to provide additional strength to the joint, as for instance, b lines of Welding 36, 36 along upstanding anges 35, 35 carried on supports 18 adjacent the 'edge of'upper and lower :flanges 27 and 28 of the sill 12 and also continued along the inner end of said flanges where they abuty may also be provided along the extreme end of web 26 where it abuts the end frame casting 10, as is best shown in Figure 5. It will be noted that in the form shown in Figures 4 and 5 the upper and lower flanges 27 and 28 of the sills 12 extend slightly beyond the eXtreme end of upright web 26 so as to form an interlocking connection with the end frame 10 in a vertical direction. Q

In the vmodified forms shown in Figures 7 8 and 17, a plurality of bosses 30st 30a are carried on the upright wall of longitudinal supports 18 as before, but in this instance the bosses are somewhat larger and disposed in a single row. In this form also the ends of upper and lower flanges 27 a and 28a are iush with the extreme end of the upright web 26 f lyl disposed supporting projection 18a.

take of similar characteristics to the jointl formed about lugs a, 30a, namely, the welded joints are in compression or shear against stresses in either direction longitudinal of the sills 12.

In the form shown in Figures 9; 10 and 18 a plurality of bosses 30a, 3()a are provided, somewhat similar to that just described but carried Von opposite sides of a single centrln this form a pair of continuousfupstanding flanges 35a are provided along the entire length and at opposite sides of the cen-v tral supporting projection 18a.

Figures 11 and 12 show a simple adaptation of an improved welded joint to a construction wherein a single I-beam section 12a is utilized for a center sill. In this form a weld is made along line where the end of beam 12a abuts the end frame10 and the joint is further reinforced by a pair of plates 41, 41 which overlap upper and lower surfaces of the beam 12a and end frame 10 adjacent the weld 40, said plates having apertures therethrough for engagement by interlocking lugs 43 and 43a upstanding on the parts 10 and 12a, respectively, and welded as before, said plates also being welded to both .parts around their margins, as indicated at In the form shown in Figures 13 and 14, a single H-beam section 12a is provided with a web portion 26a forming a part of vertical web but projecting beyond the ends of upper and lower flanges 27 and 28. The portion 26a is provided with a pair of oppositely disposed recesses-44, 44v in-which lugs 45, 45 carried by the main frame 10 are adapted to fit. A pair of plates 41, .41 having apertures for interlocking lugs 43, 43a are also provided on top and bottom of the beam, as in the case of the form shown in Figures 1l and 12. A line of welding 46 also follows along the line of juncture of lugs and recesses 44, so as to provide, additional strength against longitudinal shearing stresses.

In the form shown in Figures 15 and 16, a somewhat similar arrangement is applied to a pair of channel sections 12b-12b with which lugs 45a are provided on the inner sides of a bifurcated support 10a carried by the 'end frame 10. These lugs 45a fit in apertures 44;l formed in the vertical web of beam 12".

A similar form of welded joint is also adapted for use in connecting the ends of bolsters 16,I l16 to the side sills 13. Certain forms of such welded joints are suggested in 30"J are carried on the ends'of bolster 16 and project through circular recesses 31b formed in the side sills 13 and are welded thereto by lines of welding 32". Another line of welding 50 is formed along outward standing flanges 51 on beam 16. l

The form shown in Figure 22 is similargto that shown in Figures 19, 20 and 21, excepting that the upstanding ianges 51, 51 are omitted, and the inner marginal edges of the side sill 13 are welded at 50a iiush with the upper and lower surfaces of bolster 16.

In the modified form shown in Figure 23 the construction is substantially similar to that shown in Figure 21 with the exception that upstanding flanges 51a, 51a are made of somewhat increased height so as to permit a wedge 52 to be inserted before the parts are welded together.

In the event that an outwardly turned section is utilized by side sill 13, the joint may be completed/substantially as shown in Figure 24 in which the side sill 13b fits between' upper and lower flanges 55, 55 carried on the outer end of bolster 16, as shown.

It will now be clear that although the welded form of joint is herein disclosed in connection with a tender frame structure, it can also be applied to a wide variety of uses, especially where lighter sectioned steel parts are welded to heavier sections such as castings or the like.

We claim as our invention:

1. In a car,'two end frame members each consisting of an end sill, draft connections and a bolster formed together in an integral casting, and means connecting said end frames comprising longitudinal structural steel beams joined at opposite ends to said end frames by welded'joints including transversely extending lugs on the latter in interlocking engagement with said beams, whereby said welded joints are in compression under stresses applied longitudinally/"of said beams.

2. In a car, two end frame members each consisting of an end sill, draft connections and a bolster formed together in an integral casting, and means connecting said end frames comprising longitudinal structural steel beams joined at opposite ends to said end frames by welded -joints including transversely extending lugs on the latter in interlocking engagement with and extending through said beams whereby said welded joints are in compression under stress applied longitudinally of said beams.

3. In a car, two end frame members each consistin of anv end sill,4 draft connections and a bo ster formed together in an integral casting, and means connecting said end frames comprising longitudinal structural 5 steel beams joined at opposite ends to said end frames by Welded joints including trans Versely extending substantially circular lugs on the latter in interlocking engagement with and extending through said beams whereby said Welded joints are in compres- `.sion under stress applied longitudinally of said beams.

l Signed at Chicago, Illinois, this 8 day of February, 1928. GEORGE S. GOODWIN.

CLARA H. TOLLERTON, Eeeutrz'x of the Estate of William J. Tollerton, Deceased. Y

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