Патент USA US2405117код для вставки
Aug. 6, 1946. 2,405,11 7' A. G. DEAN BOLSTER CONSTRUCTION FOR RAIL CAR UNDERFRAMES Original Filed Nov. 21, 1941 3 Sheets-Sheet l k > INVENTOR» ?lberi 6. Dean,‘ BY %/4 ATTORNEY Aug. 6, 1946. A. G. DEAN 29405,} i 7 BOLSTER CONSTRUCTION FOR RAIL CAR UNDERFRAMES Original Filed. Nov“ 21 , 3' Sheets-Sheet 2 1941 [m ;-£I_19______ i Lli? INVENTOR ?ber; 6‘. Deal}, » 7"’ f‘ g ATTORNEY Aug. 6, , 1946.v 2,405,117 A. G. DEAN BO'LSTER CONSTRUCTION FOR RAIL CAR UNDERFRAMES Original Filedv Nov. 21, 1941 3 Sheets-Sheet 3‘ v a INVENTOR * ‘her; 6. Dean, ATTORNEY Patented Aug. 6, 1,946 2,405,117 UNITED STATES PATENT OFFICE ' 2,405,117 BOLSTER CONSTRUCTION FOR RAIL CAR ’ UNDERFRAMES Albert G. Dean, Narberth, Pa., assignor to Ed ward G. Budd Manufacturing Company, Phila delphia, Pa., a corporation of Pennsylvania Original application November 21, 1941, Serial No. 419,816, now Patent No. 2,331,891, dated October 19, 1943. Divided and this application October 15, 1943, Serial No. 506,332 } 13 Claims. 1 The invention relates to a rail car underfraine and particularly to the bolster construction and associated parts of such an underframe. The present application is a division of appll“ cant’s co-pending application Serial No. 419,8l6 ?led ‘ November . 21, 1941, now Patent No. 2,331,891, issued October 19, 1943, entitled End underframe construction for rail cars, which, in turn, is a continuation-in-part of applicant’s formerly co-pending but now abandoned appli cationrserial No. 296,026, ?led September 22, 1939, entitled Rail car underframe. As in the parent applications, one of the main (Cl. 105—226) 2 of the underframe and body side walls in ?nal assembly. It is reinforced in regions of maxi mum stress, as in the region of the center sill and in the side bearing regions. Other and further objects and advantages and the manner in which they are attained will be come apparent from the following detailed de scription when read in connection with the ac companying drawings forming a part hereof. In the drawings: Fig. 1 is a partial transverse sectional view through the underframe, the section being taken substantially along the line l—l of Fig. 2, look objects: of the invention is to provide an under ing in the direction of the arrows. frameof the class which, for standard size rail~ 15 Fig. 2 is a fragmentary longitudinal sectional way cars, is of light weight as compared with view, the section being taken substantially along known such underframes and yet one which acts the line 2-2 of Fig. 1, but the center sill proper to absorb the heavy draft and buf?ng loads as being shown in elevation. well as to take the extremely heavy collision Fig. 3 is a fragmentary plan view of the bol shocks incident to railway car operation and 20 ster and associated parts, the side wall post con which meets with A. A. R. requirements to sub nected to the bolster being shown in horizontal stantially the same or even greater degree as pre vious heavy type underframes. section. Fig. 4 is a fragmentary horizontal sectional ‘It is a further object of the inventionto pro view through the bolster and associated parts, vide an underframe structure which can be 25 the section being taken substantially on the line readily assembled in subassemblies by spot weld 4-4 of Fig. 1. ing, and. which. subassemblies. are. as readily Figs. 5, 6, and 7 are fragmentary detail sec joined together in ?nal assembly and to adjoin~~ tional views taken substantially along the lines ing side and end wall structures of the body, the 5—.—5, 6-—6 and 1-1, respectively, of Fig. 1. latter also being preferably of light weight con 30 The underframe according to the invention comprises the center sill proper It extending 1 Tothe end of achieving these objects, substan through the bolster II' and having the end ex_ tially the entire underframe, including the bol tensions l2 forming draft gear and buffer pockets sters, transverse floor beams, longitudinal between them and overlapping the end of the stringers, center and side sills and flooring, as :- center sill proper and rigidly secured thereto wellas the end sills, and the buff and draft gear and to the bolster. The underframe parts im housing center sill.extensionsconnecting the end rnediatel'y associated with the bolster further sills tothe bolsters and center sill proper are comprise, the longitudinal ?oor stringers it, the constructed, in thexmain of light-gauge mem transversely corrugated flooring It, the side sills, struction. ' . ' . bers which may be rolled or drawn sections of 40 ‘and the side wall posts 16. ' > strip stock and which are so formed in their mar The center sill proper in may comprise, as ap ‘gins as to facilitate joinder to each other and pears in Figs. ,1, 2, 3, a and 5, a compact columnar into. the body structure as a whole, as by spot structure, built up of a plurality of sheet metal Welding. ; . i sections secured together as by spot welding. It To this end also, the center sill end extensions 45 is of generally rectangular form and the corners of theunderframe connecting the end sill to the of the rectangle are formed by angular forma bolster and center sill proper, the bolster and the tions H which provide accessibility for ready at center sill proper may all be assembled as sepa tachment'of associated parts thereto. This form rate subassemblies, the parts of which are so of sill is fully described and claimed in the pat formed as to be readily so subassembled and 50 ent above referred to and further description joined together in ?nal assembly. _ ‘_ thereof except as it enters into'the bolster con The bolster, in particular, is aseparate sub structionof the invention, is believed unneces assembly, preferably of box section form in cross sary. ‘ section, and so designed as to. facilitate its at The bolster, as H, is assembled as a separate tachment in ?nal assembly to the adjacentparts 55 ‘subassembly unit and is built up in the main of 2,405,117 3 angular spaced gussets 30 of substantially the sheet metal parts. It comprises a box section structure whose top face is ?at and whose bot tom face, for some distance inwardly from its ends, is extended parallel to the top face and then inclined downwardly toward the center and provided with a flat portion at the center of somewhat greater width than the Width of the center sill, Fig. 1. height of the central portion of the bolster. These gussets have vertical ?anges 3| paralleling the opening l8 and bottom ?anges 32 overlapping the lower lateral ?anges of the side plates 2| and are strongly secured to the side plates 2| in their overlapping body portions by numerous spot In the lower portion of this central deepened portion, the bolster is provided with a rectangular opening H! to receive the cen 10 ter sill. The box-section of the bolster is comprised, in the main, of a ?at top plate IS, a flat bottom plate 20 and lateral channel section plates 2|, these latter being of laterally facing channel cross sec 15 tion with their side walls overlapping the‘top and bottom plates and secured thereto by spot welding. There are four such channel section plates 2|, and in their central portion they terminate in their lower portions at the sides of the center sill receiving opening l8, but at their upper portions, they are extended inwardly over the center sill opening to have the upper portions of the two plates on each side of the bolster terminate in close proximity adjacent its center, see Fig. 1. These extended upper portions of the side plates 2| are strongly joined together in each case by a substantially J-section member 22 overlapping their inside faces by a wide overlap and secured thereto by numerous spot .welds. As shown in Figs. 1 and 2, the bottoms of these J-section mem bers terminate at the top of the opening l8 which receives the center sill, overlap the top ?anges welds, see Fig. 1. In the angle of their lower margins, the side plates 2| are further reinforced by an angle 33 nesting with the angle formed by the body of each gusset 30 and its bottom ?ange 32. In these re gions of quadruple thickness sheet metal is se cured the center plate casting 34 of the bolster, as by riveting, as shown at 35, through the four thickness of metal and an overlapping portion of the casting. Since the center plate casting spans the opening |8 in the bolster, and is strongly secured to the reinforced structure just described at the opposite sides of the opening, the entire bolster structure is strongly tied into the center plate. The casting 34 has spaced lateral extensions, as 36, overlapping the bottom ?anged portions of the respective center sill en'd exten sions |2 and securely riveted thereto to provide a strong connection of the bolster with the bottom portions of said extensions, see Fig. 4. At the sides, the opening l8 of the bolster is further reinforced by vertical plates 31 overlap: ping the vertical ?anges 3| of the gussets 30 and 30 secured thereto. To these plates 31 are further secured at the four corners of the opening the angles 38 spot welded thereto through their ver tical arms. These angles preferably extend some 35 distance beyond the opposite sides of the bolster and form ?nal assembly joints for securing ‘the center sill proper l0 to the bolster. When the ll of the sill and are secured thereto in the overlap. The outer ends of the side plates 2| are. ex bolster is telescoped over the center sill in the tended at their ends beyond the top and bottom ?nal assembly, the angular corner portions ll plates to overlap the side walls of channel sec of the sill |0 overlap or nest with the angles 38 tion posts, as It, of the side walls, to which they 40 and are secured thereto in the overlaps by spot are secured in ?nal assembly as by spot welding. welding, see Figs. 1 and 5. ; - , Additional reinforcement and provision for se The top of the bolster II is arranged substan~ curement to the side wall posts -is provided by a tially in the plane of the ?ooring and at the top, channel member 24 telescoped between the side the bolster» may have its side plates formed with plates 2| and having its bottom wall in position cut out openings, as 39, at spaced locations, see to overlap the bottom wall of the post, this chan Fig, 1, and reinforced below said openings by nel being, in ?nal assembly, spot welded'to the angles, as 40, extending substantially the length bottom wall of the adjacent post l6 and to the of the bolster. . ,_ , side plates 2| in the subassembly of the bolster. These cut out openings receive, in the‘ sub It is desirable to strongly reinforce the bolster 50 assembly of the bolster, short channels 4| extend against buckling in the region where the hori ing beyond the inner and outer faces of thebol zontal side portion of its bottom wall merges with ster and secured to the angles 40, and the top the downwardly inclined bottom of the central ?anges of the side plates 2|, through their side portion, adjacent the region where the usual side walls, the extended portions serving as ?nal 'as bearing as 25 is provided. To this end, there is sembly joint parts to connect the ?oor stringers, provided at this point a strong inner reinforce as l3, see Figs. 2, 3 and '7. At the center, see Figs. ment which may consist'of two channels 26 and 2 and 5, the two central members 4| overlap in 21 welded to an intermediate ?at strip 28, which ?nal assembly the respective center sill end ex directly abuts the bottom 'wall of the bolster at tensions l2 and are strongly spot welded thereto, this point. The side walls of the channels 26 and 60 to tie the bolster to the center. sill end extensions ' 21 telescope between the side‘ plates 2| of the adjacent the ?oor level. These end extensions bolster and are strongly secured thereto by‘nu may additionally be tied to the bolster by gussets merous spot welds. " ' ' ' ' as 42, see Fig. 2, overlapping the vertical ?anges ' Since the side bearing, as 25, is secured adja 3| of the gussets 30 and the adjacent center sill cent this region by bolting it to the laterally ex end extensions |2 and strongly spot welded to tending flanges formed by the side plates 2| and bottom plate ISL'these ?anges are further rein each. For the last stringer l3 at the side,.th'e . cut out forced in this region by angle'me'mbers 29 spot opening is not provided to avoid weakening of welded through one of their arms'to the adjacent the bolster in this region of connectionto the side plate ‘2| and through the other of their arms ' through the adjacent laterally extending‘~ ?ange through which the securing bolts extend,'see Fig. 1. V ‘ ' At each side of the opening |8 receiving the _ center sill the bolster is further reinforced by tri side wall of the body. At this location. the con struction is that shown in Figs. 1 and 6. An out wardly facing channel 43 is secured to the angle 40 and the adjacent-top ?ange of the adjacent side-plate of the bolster and a-shortl'channel, as n- 2,405,117 5 4'4,‘ is telescoped into this channel and secured to its side walls, this channel projecting, like the channels 4!, to serve as ?nal assembly joint parts 6 5. In a rail car underframe, a box cross-sec tion bolster fabricated of sheet metal members, including top and bottom through running mem bers and side members of varying vertical depth floor stringer I3. 7 5 interconnecting said top and bottom members, After the bolster subassembly has been as the central portions of said side members being sembled with the center sill proper and its end on the bolster to secure the adjacent ends of a extensions as already described, the side wall sub assembly, with its posts l6 and side sills l5 may deepest and provided with an opening in their lower portions for the passage of a center sill be brought into place and secured thereto, by 10 therethrough, reinforcing elements for said side members extending respectively, across the top having the side sill overlap the top of the bolster and sides of said opening and some distance there side walls of beyond at top and sides to provide wide overlaps The transbetween said elements and the side members then be laid I3 and side 15 and, at the top, between said top and side rein» forcing elements, and a center plate bridging said sills [5. opening and secured to the reinforced side mem From the foregoing description, it can be seen bers on opposite sides thereof. that the bolster can be readily assembled as a 6. A ‘bolster subassembly for rail car under subassembly unit, adapted to be readily joined in ?nal assembly to the center sill and center sill 20 frames having its top arranged substantially in and the posts secured between the the‘ bolster as already described. versely corrugated flooring 14 may over and secured to the stringers end extensions by strongly reinforced joint struc tures and also to the longitudinal ?ooring string~ ers and side wall subassemblies. It is also seen that the bolster, except, for the center plate and side bearing castings is fabricated entirely of sheet metal members of relatively light gauge material so that an exceedingly light but strong bolster structure results. the plane of the floor and laterally flanged, the bolster being cut out at spaced locations below said ?ange and reinforced by an angular member secured below said out out portion and paralleling said lateral ?ange, and angular strips passing through said out out portions and projecting at the opposite sides of the bolster, said strips being secured both to the lateral ?ange and said angu lar reinforcing member paralleling the ?ange. What is claimed is: '7. A bolster subassembly for rail car under 1. In a rail car underframe, a bolster having 30 frames, comprising a box cross-section beam, a vertically deepened central portion, said bolster deeper at the center than at its ends and fabri being a box cross-section fabricated of sheet metal, the side walls being outwardly facing chan nels and the top and bottom walls being con tinuous ?at strips overlapping the side Walls of the channels and secured thereto, the side walls cated of through running top and bottom mem bers interconnected by laterally facing channel side members, the side members being formed with an opening in the lower central portions thereof for the passage of a center sill, reinforce being continuous in the upper portion but dis ments for said side members ?anking the sides continuous in the lower portion of the bolster and top of said opening, and a center plate bridg to provide an opening for the extension of a cen ter sill through the bolster, and reinforcing mem 4-0 ing the opening and secured at opposite sides of said opening to said reinforced portions ?anking bers for said side walls extending around the the sides of the opening. 8. A bolster for rail car underframes, compris ing a box section beam of greater depth centrally cross-section fabricated of ?at top and bottom 45 than at its sides and including ?at top and bot tom members interconnected by channel section plates and outwardly facing channel side plates secured through their ?anges to the top and bot side members, the side members being formed with an opening in their lower portions for re tom plates, the bolster side walls being cut away ceiving a center sill therethrough, reinforcing in their lower central portion to provide an open ing to permit the passage through the bolster of 50 members connected to said side members above a center sill, and reinforcing members ?anking said opening and extending a substantial distance said opening including means for attachment to on each side thereof, and further reinforcing the center sill in final assembly. members ?anking the sides of said openings and extending into overlapping relation with the re 3. In a rail car underframe, a bolster having its top arranged substantially in the plane of the 55 inforcing members extending above said opening. sides and top of said opening and including means for attachment to the center sill. 2. In a rail car underframe, a bolster of box floor and having transversely spaced, longitudi nally extending openings therethrough adjacent its top, spaced angular strips extending through 9. In a rail car underframe, a bolster of hollow cross-section fabricated of top and bottom plates and outwardly facing channel side plates secured the openings, in the bolster below its top, secured through their ?anges to the top and bottom plates, thereto and projecting from its opposite faces to 60 the bolster side walls forming an opening in the provide means for attaching longitudinally ex lower central portion of the bolster to permit the tending stringers of the underframe to the passage through the bolster of a center sill, and bolster. reinforcing members ?anking said opening in 4. In a rail car underframe, a box cross-section cluding means for attachment to the center sill bolster fabricated in the main of sheet metal 65 in ?nal assembly. members, comprising top and bottom through running members and side members of varying 10. In a rail car underframe, a hollow cross section transverse bolster beam, deeper at the vertical depth interconnecting said top and bot center than at its ends and fabricated of through tom members, the central portions of said side members being deepest and provided with an 70 running top and bottom members interconnected by laterally facing channel side members, the side opening in their lower portion for the passage of members providing an opening in the lower cen a center sill therethrough, reinforcing members tral portions of the beam for the passage of a for said side members, ?anking the top and sides center sill, reinforcements for said side members of said opening and providing ?nal assembly joint ?anking the sides of said opening, and a center parts for attaching the bolster to the center sill. plate bridging the opening and secured at oppo 8 site sides of said opening to said reinforced por tions ?anking the sides of the opening. 11. In a rail car underframe, a bolster having a vertically deepened central portion, said bolster being a hollow section fabricated of sheet metal and having side walls in the form of outwardly facing channels and a bottom wall in the form of a continuous ?at strip overlapping the side sill therethrough, reinforcing elements for said side members extending, respectively, across the top and sides of said opening and some distance therebeyond at top and sides to provide wide overlaps between said elements and the side members and, at the top, between said top and side reinforcing elements, and a center plate bridging said, opening and secured to the rein forced side members on opposite sides thereof. 13. A bolster for rail car underframes, com walls of the channels and secured thereto, the side walls being continuous in the upper portion prising a hollow-section beam of greater depth but discontinuous in the lower portion of the centrally than at its sides and including a bottom bolster to provide an opening for the extension member interconnecting channel-section side of the center sill through the bolster, and rein members, the side members forming an opening forcing members for said side walls extending in the lower portion of the beam for receiving a around the sides and top of said opening and in 15 center sill therethrough, reinforcing members cluding means for attachment to the center sill. connected to said side members above said open 12. In a rail car underframe, a hollow cross section bolster fabricated of sheet metal mem bers, including a bottom through-running mem ber and side members of varying vertical depth interconnected by said bottom member, the cen tral portions of said side members being deepest and interrupted at least in their lower portions to provide an opening for the passage of a center ing and extending a substantial distance on each side thereof, and further reinforcing members ?anking the sides of said openings and extending into overlapping relation with the reinforcing members extending above said opening. ALBERT G. DEAN.