US2655235A

US2655235A - Fabricated brake beam

Info

Publication number: US2655235A
Application number: US156643A
Authority: US
Inventors: Edward J Simanek
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1950-04-18
Filing date: 1950-04-18
Publication date: 1953-10-13
Anticipated expiration: 1970-10-13

Description

Oct- 13; 1953 E. J. slMANEK FABRICATED BRAKE BEAM NNN W NNN QNN 55W.

Filed April 18, 1/950 Patented Oct. 13, 1953 n 2,655,235 FABRICATED BRAKE BEAM Edward J. Simanek, Chicago, Ill., assignor VI:o

American Steel Foundries, Chicago, Ill., a corporation of New Jersey Application April 18, 1950, Serial No. 156,643

(Cl. 18S-228.6)

19 Claims. 1

This invention relates to brake beams and more particularly to a novel type of fabricated beam.

A general object of the invention is to provide a fabricated beam wherein the parts are arranged in a simple and eiiicient manner for economical manufacture and to withstand the severe abuse encountered in service` A further object of the invention is to devise a novel fabricated truss wherein the tension member is afforded a single, effective and exceptionally rigid connection with the compression member.

A more specific object of the invention is to design a brake beam with a two strap tension member, one of the straps extending through the compression member and having its ends connected against the rear sideof the compression member and the other of the straps being connected against the forwardside of the compression member.

A further object of the invention is to provide a beam wherein the connection of the tension member with the compression member includes bending the extremities of one strap rearwardly around the ends of the compression member and bending the extremities of the other strap forwardly around the extermities of the one strap.

A still further object of the invention is to provide a truss structure of the type described wherein adjacent ends of the straps may be connected to the compression member by a single connection such as a rivet.

A different object of the invention is to provide a brake beam wherein the brake heads are removable from the truss without disassembling the truss.

The invention contemplates in one modification a novel pocket on the outboard side of the brake head for snugly confining the extermities of the tension member straps to resistvthe possibility of the extremities unbending from around the ends of the compression member.

The invention comprehends in an embodimen thereof an arrangement wherein one strap aiords a seat for the brake head and the other strap is independent of the head.

These and other objects of the invention will become more apparent from the specification and the drawings, wherein:

Figure l is a top plan view of one form of the brake beam partly in horizontal section, the section being taken substantially on the line I-I of Figure 2;

Figure 2 is an end view partly in section, the section being taken substantially on the line 2--2 of Figure 1;

Figures 3 and 4 illustrate a modification of the invention, Figure 3 being a top plan view partly in horizontal section, the section being taken substantially on the line 3 3 of Figure 4; and

Figure 4 being an end view of Figure 3 partly in section, the section being taken substantially on the line 4-4 of Figure 3.

Describing the invention in detail and referring first to the embodiment shown in Figures 1 and 2, the brake beam comprises tension and compression members, generally designated 2 and 4. The tension and compression members are connected intermediate their ends at the center of the beam by a strut, generally designated B. The compression member is of channel form and comprises top and bottom rearwardly extending webs or flanges 8 and I0, and an intervening front wall I2. The front wall I2 is provided with openings I4, I4 adjacent each end through which extend the ends of an inner or rear strap .I6 of the tension member. It will be noted that the tension member at opposite sides of the strut 6 is angled rearwardly toward the respective ends of the compression member. The end portions I8, I8 of the rear strap I 6 are bent generally parallel to wall I2 and seat as at 20, 20 against the rear side of the front wall I2 of the compression member outboardly of the openings I4. The rear strap I6 seats on its forward side against the rear side of a front strap 22 of the tension member.

The front and rear straps are iitted within' a socket 24 in the forward end of the fulcrum or strut 6. The rear end of the strut comprises a iiange or base 2B secured by the plurality of

rivets

28, 28 to the front wall I2 of the compression member. j

Both straps I6 and 22, which constitute the tension member, extend the full length thereof and define bifurcated end portions. The strap 22 comprises end portions 3D, 3i) at each end bent approximately parallel to the wall I2 and seated at their rear sides as at 32 against the forward face of the front wall I2 of the compression member. Adjacent portions I8 and 3U are connected against the web I2 in any suitable manner preferably as by rivet 34, the rivet passing through complementary aligned openings in the portions I8 and 32 andwall I2.

It will be "noted that the tension member may be a single bar andmay be bifurcatecl at its ends, however-,"thepr' lent structure is preferred, inasmuch as it leand possesses much greater Strength.

` 22 are hooked around the 2, the strap v22 is, bent rearemities to provide rearwardly extending flanges 36, 36 in abutment at their inboard sides as at 38 with the adjacent outer edge of the wall I2. The outer extremities of the strap I6 are bent forwardly around the ends of the wall |2 to provide flanges 40 in abutment at their inboard sides as `at 42|with theoutboard sides of respective flanges 36. Thus the tension member, in addition to being connected at each end by the rivet 34 to the compression member, also connected around the ends ofthe compression member. are very small, it will be readilyunderstood,that they are very difficult to.,`unbendfand serve as efficient anchors for the tension member, thus reducing shearing stresses on the rivets 34.

A brake head, generally*indicated-144,t is mounted at each end of the trussVY structure d formed by the tensiongand compression meml ber. V46 with a plurality of lugs48', 48 thereon. vadapted Eachbrake rhead comprises a front wall to afford a connection for an associated brake shoe,. as will be lreadily understood by those skilled in the art. yThe head,` is provided withI .Y a hanger socket50 Vintermediate its ends open in a throat 5I through Athelforwardsidev of the tosuspend the brakebeam' from an associated truck structure, Aas will bereadily understood by thoseV skilled inV the arti The front wall.46

is connected at itsrear side` tothe forward 'edges l of top and bottom seetionsof a rear wan 54. The topand bottom sections 54 andthe top and bottom-portions Vofthe front wall'46 are connected to an intermediate portion' 56, within which is formed the above-mentioned socket 50.

- and bottom rearwardly extending, generally horizontal flanges 53 .and"60. The ilanges158 y and 60 and the rear side `of the intermediate portion 56 of Atheheadform a truss receiving cavity 62 within which extendlthe adjacent ends of` the tension and compression members. The

. top web`58 of the head overlies the top web 8 of the compression member and is connected there- .to by a plurality of rivets 64. The bottom flange j 4i60 of the, brake head underlies the bottom flange "I of the compression memberA and is connected thereto by a series' of rivets4 661. It will be noted 'that theA top and bottom flanges 58and'60 of thebrake head extend a considerable distance inboardly ofthe inboard side `of. the brake head and beyondthe inboard extremity yof theV adjacent opening |4 in the front Wallof the compression member in order to strengthen -this area of the beam.

" The rear side'of theintermediate portion 56 The front face i of the rear side of theintermediate portion 56 of the related brake head Within the recess 68 therein.' It will be noted that the rivet headat Athe forward end iof rivet 34 is countersunk withinthe portion 30 toprovide a flat seat against portion 56. The, head is alsogseated on the'rear sideofportion56 as Yat 12,'12 along spaced areas above and below portion`30 against the forward Vface of wall VI2 of; the compression member. The brake'head is providedat its inboard `end with an `abutment 14 extending inboardlyv from the inboard side thereof in order Vto provide a bearing or. abutment/for Vthe .tensionmember 4, said'abutment affording a seatas at 16'at'lts Inasmuch as the flanges36 andr40' 4 rear side against the forward side of the strap 22 adjacent its juncture with its end portion 30.

Referring now to the embodiment, shown in Figures 3 and 4, the brake beam comprises ten- 5 sion and compression members |00 and |02 in- .terconnected:.intermediate,their .ends by a. ful- The compression member is of channel form aand comprises top and bottom Webs |06 and |08 1o vextending forwardly from an intervening rear zi-lwall#I0-The rear wall is provided adjacent eachend thereofwith an opening I|2 through Lwhichextend'jthe ends of a rear strap ||4 of if-thtensiorimmber |00- y The strap |I4 is provided with end portions |6-at-'-eachffendrbent generally parallel to the rear .walll |0 and seated on their forward faces as`at 'IIB against therear side of the wall I|0 outboardly of, the adjacent opening ||2. The zostrapY ||4-is-iseatedat 'its forwardside against :the rear side-'ofv astrap |20, said straps being 'tted intermediatetheir ends within a socket 1"|22 in thevfront endl of a fulcrum |04.` The rear Aendof the fulcrum nextends vbetween the lWebs 25106- and AVI 08--of the -compression member `and seats as at I24 against the forward face of wall IIB-'and is secured'thereto as-by Vrivets |26, |26. --"Ihe front strap comprises end portions '128.128, -which-are 'bent generally parallelI tothe 3o t Wal1| IB'and-seaton the rear sides against the forward sidevof wall |I0 outboardly of" the re- 'spective-openings ||2. A rivet -|30 vextends throughadjacentportions ||6 and-|23 and wall |0,fsecuring the same to` each other.A Theten- "sion-member is additionally anchored to the Mcompression" member by'being hooked around the ends of----th`e---compression member. This anchoring is 'affordedfby bending the extremities of the strap |20 rearwardly to provideiiianges 40 A-I32 inabutmentat their inboard sides'as at |34 against therespective ends of therwall I |0. The

strap ||4-is bent atfitsextremities around the ends of the compression member to provide for- --WardlyA extending flanges |36 which'abutias at |38 -at -their inboardvsides against the outboard sides Aofthe respective flanges I 32.

Y The'arrangement-of -thertension and compres- -1sion-members constitutes a truss structure at '-each-endjof-which is-mounted abrake head, 5Q-generally-1indicated |40. Each brake yhead comprises a front Wall |42 which isbroken apart I'intermediate itsf ends to provide a throat |44 Which-leads into a socket- |46 formed within an intermediateAportioni|481of the brake head. The socket receives a hanger |50 thereinpthe hangerwbeing adapted to suspend the beam from Vvantassociated-supportstructure such as a truck frame (not shown)." The front wall is provided with al plurality of Llugs |52 on the forward face 6G thereof adapted-to afford a usual seat and connection forassociated brakev shoe means (not vvvshown)V as willbe readily understood vby those V:slnlled'in the art. The front walll is connected Won-itsfrear-side `to theforward edges of top and bottom portions of `a-rear wall |54, said portions amer-ging with the -top and bottomsides of the Y--intermediate-Vportion|48 and with rearwardly extending top and ,bottomY webs |56 and |58. lThe top-and bottom'websand the rearvside of d-theflintermediatcportion-|48 form a truss re- The top web |56 overlaps the top web |06 f- -and thev bottomwebVV |58 underlaps D the Vbottom web f'| 0 8. AleThe brake head issecured to the truss structure by means of a rivet |62 Whichspasses rivet also passes through aV complementary opening in a spacer |64 which is snugly tted between the top and bottom Webs |06 and |08 of the compression member in order to prevent a collapse of these webs when the rivet is applied. The spacer |64 also provides a seat as at |66 for the tension member |00 on the forward face of strap |20 at the bend or inner end of thel portion |28 of strap |20.

The brake head is provided on its inboard side with an inboardly extending abutment or lug 66, said abutment being disposed inboardly of the spacer |64 and extending between the webs |06 and |08 and affording a seat for the tension member as at |10 on the forward face of strap |20 at a point inboardly of the juncture with its end portion |28. The cavity |60 is closed at its outboard end by an outboard wall |'|2, said outboard wall being offset outboardly adjacent the rear of the head to provide an inboardly facing pocket |74, said pockety snugly receiving the outer extremities of the straps I4 and |20, namely the anges |32 and |36, and providing an inboardly facing surface |'|6 tightly engaged with an outboardly facing surface on the outboard side of the adjacent flange |36. It will be readily understood that this type of connection and pocketing of the extremities of the tension member prevents the ilangeshll and |36 from unbending from around thef end ofthe compression member When loads are applied tothe tension member.

Iclaim:

1. In a brake'beam, aftmssstructure comprising a channelcompression member, having top and bottom webs .and an-intervening wall, said wall having openingsadjacent" the ends of said compression memben a" tension member, a fulcrum interconne'ctingfsaid members substantially centrally of the beam, said tension member comprising forwardand rear straps extending longitudinally in adjacent relationship, the forward vstrap having end portions bent generally parallel to said Wall and seated at their rear sides against the forward face of said wall outboardly of said l openings and having their extremities bent rearwardly around respective ends of the wall, said rear strap extending adjacent each end through said openings and having end portions bent generally parallel to said wall and seated on their .forward faces against the rear side of said wall outboardly of said openings and bentforwardly at their extremities around respective rearwardly bent extremities of said'front strap, means interconnecting adjacent portions of the front and rear straps to said wall, a brake head at each end of said structure lcomprising a socket having a rearwardly facing surface in abutment with forwardly facing surfaces on said compression member above and below the adjacent end portions, each head having top and bottom webs connected to the top and bottom webs of said compression member.

2. A brake beam comprising tension and compression members and a fulcrum therebetween forming a truss structure, said compression member comprising spaced generally horizontal top and bottom webs and an intervening wall, said wall having openings therethrough -adjacent its ends, said tension member having abutting front and rear straps, the rear strap having end portions extending through the openings and seated against the rear side of the wall outboardly of the openings, said front strap having end portions seated against the forward side of the wall` i outboardly of saidopenings, the end portions of one strap having segments bent around the ends of said `Wall and theend portions of the other strap Ihaving segments bent around the nrstmentioned segments, means connecting adjacent portions of the front and rear straps to each other and to said wall of the compression member outboardly of said openings, brake head members mounted on theY ends of said truss structure, and abutment means connected to vat least one of the mentioned members disposed inboardly of said means and in abutment with the front face of the front strap' of thev tension member in an area adjacent the juncture of the end portions of the front strap with the remainder thereof.

3. In a brake beam, a truss structure compris` ing a channel compression member having a generally vertical wall, a tension member, a strut extending between said vmembers intermediate their ends and having a socket at its forward end receiving said tension member and seated at its rear end against the forward f-ace of said wall and connected thereto, said Wall having openings therethrough adjacent each end of the beam, said tension member having a rear strap extending at its ends through the openings and against the rear side of the wall, said tension member having a forward strap abutting at its ends against the forward face of said Wall, a rivet at each end of the compression member extending through adjacent portions of the straps and said wall, and a brake head on each end of said structure.

4. A brake beam, comprising a truss structure, having a U-section compression member with a generally vertical front wall and top and bottom webs extending rearwardly therefrom, said front wall having an opening adjacent each end, a tension member comprising a pair of straps extending alongside one another, one of the straps extending at its ends through the openings and having end portions extending outboardly of the openings against the rear side of said Wall, the other strap extending at its ends against the forward side of the wall outboardly of -said openings, and a rivet extending through adjacent ends-of the straps and said front Wall.

5. In a brake beam, a truss structure comprising tension and compression members, said compression member being of channel form and having ya generally vertical web with openings therethrough adjacent the ends thereof receiving portions of the tension member therethrough, said tension member having other portions engaged with the forward side of the wall, and means connecting said first and second-mentioned portions to the rear and forward sides of said wall, respectively.

6. A brake beam, according to claim 5, comprising a brake head mounted on each end of the structure, eachhead having `a pocket at its outboard side snugly receiving the adjacent ends of the first and second-mentioned portions therein.

'7. In a brake beam, a truss structure comprising tension and compression members, said tension member having portions extending through said compression member adjacent its ends and said portions seating against the rear side of said compression member and having their extremities bent forwardly around the ends of the compression member, said tension member having other portions bent rearwardly around the ends of the compression member.

8. In a brake beam, a truss structure comprising acompres'sion member, a tension meniber .having .portionsgextending atfthe vrear and 1 frontV sides .-'of .saidv compressionpmember .adjacent v each..end thereof, oneofitheadjacent .portions overlapping. the :otheroutboardly of: theadjacent end of the compression; member .and .all portions overlapping-the adjacent ends .of the compression member.

z 9;V In a brake beam, a,truss ;structure.compris wing. tension. andcompression..` members,=.;and a `fulcrum interconnecting'. said. members. at approximately the centers'` thereof, said compression :member having. spacedtop yand bottom. Webs and .head having. a. luginzabutment with said vfront r strap, azspacer? disposedywithin said socketand in engagement -With said.l top and bottomv Webs, y and arivet extendingthrough said spacer, -top and bottom webs, and said brake head to securely f rfasten each ofsaid brake .heads lto saidtruss.

w10'. Inl a .brake beam, a truss .structure com- -.prising Vtension and .compression .members vand a f fulcrum -interconnecting lsaid lmembers medial 2 the .ends thereof, said-,compression member having a front wall with openings adjacent theends fthereof, saidtension .member .hav-.ing a portion extending through thegopenings. and connected i against Y the rearf side lof :said g wall, said f tension member. having another :portion connected tothe front. face -of said. wall.

11.-In a brake beam, a truss structure vcom- -prisingy tension andcompression members and a fulcrum interconnecting .said members .medial the ends-thereoL-said.-compression `member hav- A-ing. a front wall `with .openings .adjacent the endsthereof,v said A.tension member having a portion extending `throughfthe openings and .connected against-.the .rear sideof said Wall,

said tension memberhaving.anotherportion connected yto the front'faceiof said Wall,.said second mentionedA portion .being .bent rearwardly. rat its extremities around'V the ends fof the .compression member to provide flanges bearing ontheir inboard sides againstrespective ends 4of said wall, said first mentioned portion` being Abent forwardly at its extremities around respectivey yextremities 'of said secondnmentioned portion toprovide flanges bearing Yatgtheir inboard sides.. against the outboard sidesof said-anges-on the extremities of said second mentioned portion.

12. In a brake beam, a trussstructure -comprising tension and compression members and a fulcrum connecting said members medial -the ends thereof, said compressionr member having a front wall with openings adjacent the ends thereof, said tension member having a portion extending through thevopeningsand connected againstA the rearside 4of said Wall,'-said-tension member having another' portion Vconnected` to they front face Yof v said wall, said Y portions having extremities hooked .around theA ends Vof said compression member.

.13.,In abrakebeam, a truss structure comprising tension and compression members and. a fulcrum. interconnecting said members `Vmedial thereof, said tension member comprising .front and rear straps, said rear strap-.having end portions extendingthrough the openings and connected against the `rear side ofsaid Wall, said front strap. being connected to the front face Vof said. wall.

14'. In a brake beam, atruss structure comprising tension and compression -members interconnected .medial their ends by a strut, said compression member comprising spaced top and bottom. Webs and .an intervening rear Wall having openings adj acent; its ends, .said tensionA member comprising front and rearstraps, said rear strap .extending at its ends throughsaid yopenings and connected against fthe backzside of said rear wall and having itsextremities bent forwardly around "the-extremities of .said rear. Wall, said front strap having .its ends connected against the front side `ofsaid-rear. wali and having its extremities bent rearwardlyy around the extremities of said rear ..Wal1, one of-.said strap extremities being bent around the other .of said strap .extremities,a

brake head mounted on each end of. saidtruss.

.said head having aV truss socket for reception of the .truss end,said top and bottom Webs being complementally received Within said socket, said brake head having a lug in abutment withrsaid front strap, a spacer disposed within said socket --and in engagement with the inner side surfaces prising-tension and compression members and a fulcrum interconnecting said members medial the ends thereof, .said .compression member having spaced top andbottom Webs .and an intervening VWallf .said Wallhaving openings receiving the ends. ofthe, tension member therethrough, and

- connectionsbetween. said ends of the tension member and the rear'side of said wall, and a brake head mounted on the end of said structure and having a pocket on the outboard side there- .of receiving said tension member therein.

-16: In a brake beam, a trussstructure vcomprising tension and compression members, said compression .member having openingsV adjacent l itsends, said tension member having bifurcated ends embracing the ends ofthe compression mem- .ber through said openings, and fastening means forsecuring said biiurcated ends vto said coml pression member.

. '.17. .In a brakebeam, a trussstructure comprising .tension and compression rmembers and a fuicrum interconnecting said members medial the endsthereof, said compression member having openings adjacent its ends, said tension member extendinggatits ends through said openings against the back 4of saidcompression member and :having its extremities bent forwardly around the extremities* of-saidcompression member, and

a brake head mounted on each end of the structure, Veach, head comprising an inboardly facing surface abutment with an outboardlyfacing -surface on the Aadjacent extremity to prevent the -vextremity from -unbendng from around-said compression member.

. 18.1 A brake beam/comprising a truss structure .-havingtension and compression members, said -cornpression member having openings adjacent its ends, said tension member having bifurcated ends :embracing-the Vends of said compression -member and having portions-extending through Vsaid openings, fastening means for securing said 9 10 bifurcated end portions to said compression mem- References Cited in the le of this patent ber, and a brake head mounted at each end of UNITED STATES PATENTS said truss structure, said brake head having a lug extending inboardly therefrom and bearing Number Name Date against said tension member. 5 690547 Baker Jan' 7 1902 690 824 Baker Jan. 7 1902 19. A brake beam comprlsmg tension and com- 8131104 H t F b 2,7 1906 pression members, said tension member extend- 823601 Huntoon J e 19 1906 ing through the compression member adjacent 867184 B51235011 "Sure 24 1967 its ends and against the front and the rear sides 884446 Wu. ep 14 1908 of said compression member and around the ends 10 1 mms Apr' thereof. FOREIGN PATENTS Number Country Date EDWARD J. SIMANEK. 140,643 Great Britain Apr. 1, 1920