US2365199A

US2365199A - Truck

Info

Publication number: US2365199A
Application number: US414550A
Authority: US
Inventors: David M Light
Original assignee: American Steel Foundries
Current assignee: American Steel Foundries
Priority date: 1941-10-11
Filing date: 1941-10-11
Publication date: 1944-12-19
Anticipated expiration: 1961-12-19

Description

y Patented Dect 19, 1944 TRUCK Davia M. Light, cmcaganl., assignor to American Steel Foundries, Chicago, Ill., a corporation of New Jersey Application Gctober 11, 1941, Serial' No. 414,550`

34-Claims.

` My invention relates to a railway car truck and more particularly to a four wheel railway car truck utilizing a novel spring suspension comprising friction elements in engagement with the columns of the frame and with the ends of a spring cap mounted on a bolster supporting auxiliary spring.

. The general object of my invention is to devise a novel form of railway freight car truck of the above type suitable for high speed freight car service and adapted to development of varying amounts of friction as may be required underdifferent operating conditions.

A specific object of my invention is to devise a high speed quick wheel change type of freight car truck utilizing truss side frames With central bolster openings in which the ends of the load carrying member or bolster may be spring supported, the bottom wall of the bolster being interlocked with a novelV form of friction shoe having frictional engagement with the adjacent column, said shoe also having frictional engagement with a spring cap with which the bolster is also interlocked.

In my novel arrangement, the truck comprises a side frame having a two-level tension member, the upper level affording a seat for a plurality of long travel coil springs, said upper level being cut away centrally of the frame to afford an opening for a somewhat longer bolster supporting coil spring, said spring supporting on the top thereof a spring cap comprising V-shaped friction surfaces at the ends thereof 'in frictional engagement with complementary surfaces on friction shoes abutting respective columns of the frame My novel arrangement contemplates a structure such as that above described wherein the bolster is engaged by means of a spring plate with a novel follower which interlocks the bolster with the above-mentioned spring cap as well as with the above-mentioned friction shoes.

In the drawings Figure 1 is a fragmentary sectional View 0f a railway car truck embodying my invention, the

section being taken in a plane bisecting one of the frame members longitudinally and as indicated by the line I-I of Figure 2, only one end of the truck being shown inasmuch as it is ,similar at opposite'ends.

Figure 2 is a fragmentary sectional view of the truck structure shown in Figure-1, the section being taken in the horizontal plane indicated by the line 2 2 of Figure 1.

Figure 3 is a sectional view of thetruck ar rangement shown in Figures 1 and 2, the section being taken substantially in the transverse vertical plane bisecting the truck frame and as indicated by the line 3`3 of Figure 1.-

' ADescribing the structure in detail, myv novel truck comprises a truss side frame having the usual outline with the compression member 2,

the tension member 4, and integrally formed colber may have a box-section with a bottom chord I4, a top chord I 6, inboard and outboard` side walls i8 and 2B, and spaced vertical *traiisverse reinforcing

ribs

22, 22, said vtop chord beingA widened beneath said bolster opening to form a main spring seat 24 for coil springs seated thereon, said coil springs being diagrammatically indi- .cated as at 32, 32 and being symmetrically seated on the seat 24 as may best be understood from a consideration of the top plan view of Figure 2.

Positioning means 30, 30 may be formed on the seat 24 for the

springs

32, 32 and an annular flange 34 may be formed on the web IB around the opening 36 therein, said flange being reinforced bythe

vertical ribs

23, 23. Centrally of the spring seat 24, the top chord IE is'interrupted to form the before-mentioned opening 36 for reception of the auxiliary spring 38, said spring being afforded a seat as at 39 on the bottom' web I4 of the tension member. `The upper end of the spring 38 is positioned against a spring cap 42 as hereinafterv described, and the upper ends of the spring group 32 may be confined in Well known manner by a spring plate 40 upon` 4which the end of the bolster may seat in interlockingengagement therewith as at 4l, 41.

The springcap 42 comprises the arcuate inboard and outboard side walls 44 and 46 respectively, merging at the ends thereof with the V-y shaped diagonal friction surfaces formed at the ends of the cap and in complementary engagement with the

friction shoes

12, 12 as at 82, 82. The cap also comprises a top wall with an annular opening 52 centrally thereof, said top wall being downwardly flanged as at 54 around said opening to provide a spring seat between the flanged portion and the varcuate walls 44 and 46` for the spring`38 as at 56 in the manner above described.

Positioned in the openingl 52 is the depending of the spring plate 4I. Centrally of the follower Il' is an openingA il aligned with and slightly smaller than the opening 52 in the spring cap 42. The opening Il in the follower is partly defined by the wall of an annular hollow lug 'lo which projects downwardly into the opening B2 in thespring cap as heretofore described, `thus positioning the follower Il with respect to the spring and wherein the bolster is interlocked with said shoes and said spring cap by a follower and with the inboard webs of the adjacent columns by guide lugs. It will also be apparent that by varying the resiliency of the auxiliary spring, varying amounts of friction may be developed, as desired.

Itis tobeunderstood. thatI do notwishtobe limited by the exact embodiment of the device shown which is merely by way of illustration 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 the spirit of the invention or the scope of the claims.

cap. Extending into the top of the opening 58 v is a lug 4I formed on the bottom of the spring plate 4U. Thus, it may'be seen that the spring plate 40 is positioned with respect to the follower by means of the spaced lugs 4I, 4i and 43.

Each friction shoe 12 is a generally rectangular compact body of metal comprising a bottom wall 14, spaced

side walls

18, 18 and a rear wall 18 on the outer side of which is formed a friction surface in frictional engagement as at 80 with the abutting friction surface 1 on the adjacent column, said last-mentioned surface being malchined on the column or welded thereto as at 9, 9.

On the inner side of each shoe is formed a V- shaped friction surface in complementary engagement as at 82 with the abutting end of the spring cap 42, and a pocket B3 is formed at the bottom of each shoe by said V-shaped surface,.

said side walls and said bottom wall, within which pocket is positioned the associated end ofthe spring cap. In the top of each shoeis formed a recess 85 within which is received the associated end 62 of the spring cap 42, as heretofore described. f

The bolster 8B is of generally rectangular boxiike form and comprises the

side walls

88, 88, the intermediate transverse vertical wall 90 parallel with said side walls, the top wall 92, and

the bottom wall 94. Each side wall of the bolsteris provided with a vertical positioning lug 9B for interlocking engagement with a bracket 98 formed on the inboard web of the column 6. The depth of the lug 96 is less than the distance I claim:

1. In a railway car truck, a side frame comprising tension and compression members and spaced columns defining therewith a bolster opening and spaced window openings, said tension member comprising top and bottom webs, said top web having an annular opening therein, a spring group seated on said top web, an auxiliary spring extending through saidlast-mentioned opening and seated on said bottom web, a spring cap seated on said auxiliary spring and comprising a plurality of V-shaped friction surfaces, friction shoes in frictional engagement with respective surfaces and with respective columns, a follower interlocked with said shoes and said cap, and a bolster extending into said bolster opening, supported by said spring group, and interlocked with said follower.

2. In a railway car truck, a truss side frame comprising spaced columns partly dening therebetween a bolster opening, wear plates mounted on said columns, apluraiityof friction shoes each comprising a friction surface in abutment with the adjacent wear plate and a friction face on the opposite side thereof, bolster supporting springs mounted on said frame, a spring cap seated on certain of said springs and comprising friction surfaces in engagement with said faces, a member seated on and engaged with said shoes and engaged with said cap, a spring l plate seated on other of said springs and engaged with said member, and a bolster end received in said opening, seated on said plate, and engaged therewith.

between the top of the bracket 98 and the top of the bolsteropening 8 as indicated at A in Figure 3 so that the bolster may be raised in the bolster opening and removed therefrom while the supporting spring group and novel friction device r emain in normal assembled relationship.

`In assembling my novel truck. it will be aipparent that the spring group 42 and spring 38 may be positioned on the tension member on their respective seats, after which the novel friction shoes may be-'positioned against the columns. the spring cap-42 may1 be placed upon the 3. In a railway car truck, a truss side frame comprising spaced columns partly defining therebetween a bolster opening, a plurality of friction shoes in frictional engagement with said columns, each of said shoes comprising a V-shaped friction face, bolster supporting springs mounted on said frame in said opening, a spring cap seated on certain of said springs and comprising friction surfaces complementary to and in engagement spring 38 and interlocked with said shoes by the follower 58. and the bolster may be inserted at the top of the bolster opening and may be positioned with respect to the follower 58 as abovedescribed'.

It will thus be apparent that I have designed a Quick wheel change railway car truck wherein the lower web of a two level tension member affords a spring seat centrally thereof for a spring auxiliary to the normal bolster supporting spring group, said spring supporting a springl cap with V-shaped friction surfaces at the ends thereof in engagement with complementary surfaces on associated friction shoes, said shoes also having frictional engagement with the adjacent columns and interlocked with said member, and a bolster received in said opening, seated on said plate, and interlocked therewith.

4. In a railway car truck, a side frame comprising a bolster opening and spaced columns, a pair of friction shoes each comprising an outer nat face frictionally abutting one of said columns, and an inner V-shaped face, bolster supporting springs seated on said frame in said opening, a spring cap on one of said springs and comprising V-shaped friction surfaces in complementary engagementv with the V-shaped faces on said shoes, a follower engaged with said cap and both of said shoes, and a bolster extending into said opening,

I by other of said springs, and

i 10. In a railway car truck, a side frame comprising top and bottom' members and spaced columns defining therewith a bolster opening, a lplurality of `springs supported on said bottom member in said opening, a bolster supported on certain of said springs, a spring cap seated on other of said springs and comprising V-shaped friction tion faces, friction shoes in frictional engagement with respective faces and respective columns, and follower means seated on said shoes and engaged with said cap, said first-mentioned springs affording bolster supporting means.

6. In a railway car truck, spaced side frames each comprising' a compression member, a twolevel tension member, and spaced columns defining therewith a bolster opening, a plurality of resilient -means seated respectively on the upper and lower levels of said tension member, .a spring cap seated on the intermediate of said resilient means and comprising friction faces, shoes in frictional engagement with said faces and said columns, and a bolster having an end extending into said opening, said end being supported on and interlocked with said shoes and interlocked with said cap, and said end being additionally supported by other of said resilient means.

'1. In a railway car truck, a side frame comprisplates mounted on said columns, a plurality of friction shoes each comprising an outer flat face y ing a bolster opening and spaced columns, wear f frictionally abutting one of said wear plates and an inner V-shaped friction face, bolster supporting springs seated on said frame in said opening,- a spring cap seated on certain of said springs and comprising V-shaped friction surfaces in complementary engagement with respective of said V- shaped friction faces, and a bolster extending' into said opening, supported on other of said springs, and said shoes, sai'd 'bolster being vertically movable with respect to said cap but being interlocked therewith against relative movement longitudinallyand transversely of said frame.A

8. In a railway car trucka side frame comprising a compression member, a two-level tension member and spaced columns defining therewith a bolster opening, a plurality ofvcoil springs seated respectively on the upper and lower levels yof said tension member, a spring cap supported by certain of said springs and comprising friction faces, friction shoes in frictional engagement with respective faces and respective columns, a follower engaged with said cap and said shoes, and a bolster extending into said opening, supported interlocked with said follower. y l

9. In a railway car truck, a side frame com faces at the ends thereof and an opening in the top wall thereof friction shoes in frictional engagement with respective faces and respective columns, and a member interlocked with said.

shoes and said bolster and comprising engaging means extending into said'last-mentioned opening 1.1. In a follower for a railway car truck, a flat member having a narrowed shoe engaging portion at each end thereof and interlocking'means on the top thereof, and a depending lug centrally of said member and intermediate said portions for interlocking engagement with an associated friction means.

12. `In a railway car truck, a side frame comprising a compression member, a tension member, l and spaced columns dening therewith a bolst'er opening, a plurality of coil springs seated on said tension member, a spring cap supported by certain of said springs and comprising friction surfaces, friction shoes in frictional engagement with respective surfaces and respective columns, a follower engaged with said cap and said shoes, and a bolster extending into said opening, supported by other of said springs, and engaged withsaid follower.

13. In a railway cartruck, a truss side frame comprising a compression member, a tension member, and spaced columns defining therewith a bolster opening, a plurality of springs seated on said tension member, a, spring cap on certainof said springs, friction shoes supported by said cap below the tops of the other of said springs and in frictional engagement with respective columns, a member interlocking said shoes and said cap, and a bolster end received in said opening, supported on the last-mentioned springs, and interlocked with said last-mentioned member.

14. In 'a railway car truck, a side frame comprisingtop and bottom members and spaced columns defining therewith. a bolster opening, a plurality of coil springs supported on said bottom member 'in said opening, a spring cap seated on certain of said springs'and comprising V-shaped friction surfaces at the ends thereof and an opening in the top wall thereof, friction shoesl supported by said columns in frictional engagement with said surfaces, a member interlockedvwith said shoes and comprising positioning means extending into said last-mentioned opening, and a bolster supported on the other of said springs at a prising a compression member, a two-level tenintermediate of said springs and comprising fricl tion faces,.friction shoes in frictional engagement with respective faces and respective plates,v and a bolster extending into said opening supported by other of said springs and .said shoes, said bolster being interlocked with said cap against relative longitudinal or transverse movement with respect thereto.

point above said cap' and engaged with said member.

l5. In a railway car truck, a frame comprising spaced columns and an, intervening bolster opening, friction means comprising friction shoes in frictional engagement with respective columns,

and wedge m'eans resiliently supported between said shoes in wedge engagement therewith, 'a

`bolster in said opening comprising a bottom wall bearing vertically on said -shoes for actuation thereof, and a spring group on said frame bearing against` said bottom wall bolster.

16. In a, railway car truck, a side frame comprising a bolster opening and spaced columns, bolster supporting resilient means supported by said frame in said opening, a spring cap supportfor support of said Y ed by certain of said means, a plurality of friction shoes each having frictional engagement with said cap and with the adjacent column, a follower seated on said shoes and interlockled therewith and with said spring cap, and a. bolster extending into said opening, lsupported by said' means, and bearing on said follower.

17. In a side frame for a railway car truck, top and bottom members and spaced columns denning therewith a, bolster opening, a plurality of bolster supporting springs on said bottom member in said opening, friction means on the intermediate of said springs, friction elements engaged with said means and respective columns, and follower means seated upon and interlocked wit said elements.

18. In a railway car truck, a side frame comfriction surfaces on said columns, resilient means seated on said frame in said opening, a cap on certain of said means and comprising V-shaped friction faces, friction shoes in frictional engagement with said faces and said surfaces, and a bolster extending into said opening and supported on other of said resilientl means, said bolster being operatively engaged with said shoes,

19. In a railway car truck, a side frame com- `20. In a railway car truck, a side frame com-- prising spaced columns and an intervening bolster opening, resilient means on said fr'ame in said opening, wedge means supported on said resilient means, friction elements engaging' said wedge means and respective columns, a bolster in said opening comprising a bottom wall above said elements and bearing vertically thereon for actuation thereof, and a spring group on said frame bearing against said wall for lsupport of4 said bolster.

21. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, resilient means on said frame in said opening, a friction member thereon, friction shoes engaging said member and respective columns,

' a bolster in said opening comprising a substantially horizontal bottom wall above said shoes and bearing vertically thereon, and a spring group on said frame for support of said bolster.

22. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, resilient means on said frame in said opening, a friction member on certain of said means, friction elements engaging said member and respective columns, and a bolster in said opening above said elements and comprising a substantially horizontal bottom wall supported from other of said means, and means engaging said bolster with said elements for actuation thereof, said elements being entirely Adisposed beneath said bottom wall` 23. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, resilient means on said frame in said prising a bolster opening and spaced columns,

bolster and said elements for interlocking said bolster therewith, and a spring group on sai frame for support of said bolster. 24. In a railway car truck, a side'frame comprising spaced columns and an intervening bolster opening, springs on said frame in said opening, a friction member seated on one of said springs, rfriction elements in frictional engagement with said member and respective columns, and a bolster comprising a bottom wall supported cn vthe other of said springs and operatively engaged with said elements, said elements being entirely disposed beneath said bottom wall.

2 5. In a railway car truck, a. side frame comprising spaced columns and an intervening bolster opening, springs onsaid frame in said opening, a friction member seated on one of said springs, friction elements in frictional engagement with said member and respective columns, and a bolster supported on the other of said springs and operatively engaged with said elements, said operative engagement comprising a rigid member seated upon and -engaged with said 'elements and also engaged with said friction member, and means engaging said bolster with said rigid member.

26. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, a plurality of friction shoes engaged with respective columns, bolster supporting springs on said frame in said opening, a friction member on certain of said springs and comprising friction surfaces in engagement with said shoes, a follbolster supported on other of said springs and engaged with said friction elements.

28. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, a plurality of springs on said frame in said pening, a friction member on certain of said springs, friction elements engaged with said member and respective columns, a follower member seated on and engaged with said elements and interloeked with said friction member, and a bolster supported on other of said springs and operatively engaged with said follower member.

29. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, friction shoes in engagement with respective columns, a, friction element resiliently supported from said frame in wedge engagement with said shoes, a bolster supporting spring group on said frame in saidopening, a bolster comprisi ing a substantially horizontal bottom wall supported on said group above said shoes, and actuating means engaging the bolster with said shoes.

30. In a railway car truck, a side frame comprising spaced columns and an intervening bolster opening, friction shoes in engagement with surfaces on respective columns extending transversely of said frame, means resiliently supporting said shoes from said frame, saidmeans comprising a member in complementary wedge enfaces on respective/columns extending transversely of said frame, means resiliently, supporting said shoes from said frame, said means comprising a member in wedge engagement with said shoes, a bolster supporting spring group on said frame in'said opening, a follower member seated upon and engaged with said shoes, and abolster 'on said spring group land operatively engaged with said follower member, said shoes being entirely disposed beneath the upper level of said group.

32. In a railway car truck, a side frame, a spring group supported therefrom, a friction member resiliently supported from said frame centrally of said group, friction shoes at opposite sides of said member in wedge engagement therewith, saidshoes being entirely disposed beneath the upper .level of said group and being in frictional engagement with friction means on said frame, and a bolster supported from said group and said shoes.

33. In a railway car truck, a side frame, a plurality of springs supported therefroma friction member on'the intermediate of said springs, friction elements frictionally engaged with said member and with means on said frame, and a bolster supported on the` other of said springs, said bolster being operatively associated with said friction elements.

34. In a railway car truck, a. side frame comprising spaced columns andan intervening bolster opening, resilient means on said frame in said opening, a friction member on said resilient means, friction shoes engaging said member and respective columns, and a bolster in said opening comprising a substantially horizontal bottom wall above said shoes `and bearing vertically thereon.

l DAVID M. LIGHT.