US2404278A - Railway car truck - Google Patents

Description

July 16, 1946. G, E, BATH 2,404,278 RAILWAY CAR TRUCK Y Filed May 26, 1944 l gw/WM I Patented July 16, 1946 RAILWAY CAR TRUCK George E. Dath, Mokena, Ill., assigner to W. H.

Miner, Inc., Chicago, Ill., a corporation of Delaware Application May 26, '1944, Serial No. 537,385

A4i Claims. (Cl. 10S-197) This invention relates to improvements inr railway car trucks.

One object of the invention is to provide in a railway car truck simple and eflicient means for effectively snubbing the action of the usual truck springs by frictionally resisting upward and downward movement ofthe truck bolster.;

A more speciiicobject ofthe inventiony is to provide friction means for snubbing Lor dampenin-g the action of the truck springs of a railway car comprising spring actuated rocking friction' members mounted in pockets in the truck side frames at the bolsterguide portion thereof and engaging opposite sides of the bolster to frictionally oppose upwardv and downward movement of the bolster.

Other objects of the invention will more clearly appear from the description' and claims hereinafter following.

In the drawingforming a part of this specification, Figure 1 is a side elevational view of a portion ofl one of the side frames of a railwayL car truck and the associated bolster and truck springs, illustrating my improvements in connection therewith. Figure 2 is a longitudinal, ,horizontal sectional View, corresponding substantially to the line 2-2 of Figure l. Figure 3 is a detail perspective View of a friction rocker employed in my improved construction.

In said drawing, III indicates one of the side frame members of a railway car truck. The side frame member is in the form of a casting and has a top member II and a bottom member I2 .connected by vertical sections I3-I 3. As will be understood by those skilled in this art, the car truck includes two side frame members III-I0, a truck bolster I4, and truck springs I5. The opposite ends of the bolster I4 are guided between the vertical sections I3-I3 and I3I3 of the truck side frames and the bolster ls supported by the truck springs I5 of the two side frames, which springs rest on the bottom members I 2-I2 of the side frames. The truck bolster I4 supports the car body vby means of the usual body bolster.

As shown in Figure 1, the sections I3-I3 are inwardly offset at the upper ends thereof to provide guides IB-IB which cooperate with guide seats I'l-I'I at the sides of the bolster I4. The vertical sections I3-I3 of each side frame casting I0 include a vertical wall I8 and inner and outer webs I9 and 20 at right angles to said wall,

which webs, together with similar webs on the.

My improved snubbing means comprises broadly a pair of rocking friction members V.A-A

carried by each side frame member and frictionallyengaging the b olster at the Vopposite sides, anda pair of springs B-B associated with each rocking member for tilting the same against'the bolster in frictional contact therewith.

In carrying out myY invention, I provide pockets12Iy-ZIineachside frame at each side of the yb'olsterguide opening thereof. Each pocket 2I is formed' by the inner and outer webs IS'and 20 of Athe section I3 of the side frame, a vertical wall 227'forming the back wall of the pocket, a horizontal bottom wall 23, and a horizontal top walll 24.v A s will be evident, the walls'22, 23, and 24 Vextend from one web tothe other of the side frame. The pocket 2I `opens toward the bolster,

said opening, which is indicated by 25, being of A'rectangular shape. Y

Each vfriction member A` is in the formof an L-shaped plate comprising a, vertically disposed, flat plate section 26 and a laterally extending base portion or flange 21 at the lower end of the plate section 26. The baseilange 21 has a substantially fiat, upper surface 28, which forms a seat for the springs B-B which cooperate with the friction member A. The underneath surface of the base flange is substantially flat, as indicated at 29, and terminates at its outer end in an upwardly curved face portion 30. The plate section 2B presents a substantially flat friction surface 3|, adapted to engage the corresponding vertical side face of the bolster I4. The friction members A-A are rockingly supported in the pockets 2I-2I of the truck side frame, the base portions or flanges 21-21 of said friction members being supportedV on the bottom walls 23-23 of the pockets.

The springs B-B are in. therform ofV helical coils, two of such coilsl being associated with each friction member A. The two springs B-B of each friction member are interposed between the base 21 thereofrand the top wall 2401 the pocket. The springs B-B areunder initial compression and tend to tilt the friction member A against the bolster to hold the friction surface thereof in tight frictional engagement therewith. As=will be evident, the friction members A-A offer frictional resistance to up and down movement of the bolster, which is substantially constant at all phases of the operation thereof: The recoil action of the truck springs I5-I5-I5-I5 is effectively snubbed by the resistance provided by the friction members A-A in resisting upward movement of the bolster. As will be evident, the compression of the springs Y frame and pressing on said base Vplate elements' to rock said members against the bolster frictionV l. In a railway car truck, the combination with".V truck sideframe members'tax'trucl; bolster-v, and y springs supporting said bolster on theV side frame members, said side frame members'being provided with bolster guides; of la pocket in one of said side frame members at the bolster guides'g'sa-id' pockethaving a bottom wall; a rockablegfriction;

member in said pocketl'engaging the bolster,said Yfriction rmember havingma laterally projecting, platelilearm atV its lower endf provided with la rounded bearing*projection'fulcrumed on the bot- Y toinwall of saidfpocketi'and additional .springsr reacting between the side frame and arm of said l friction member to Vrock ytherlattery vagainst the bolster.

Y Y`2f. In a railwaycar truck, the combination vwith a truckvsid frame V'provided with.v bolster guides, a truck bolster having thevertical outer sides thereof provided withl friction surfaces, land springs supporting said bolster on the truck side frame between said guides; of .afpocket in said side frame; at each sideof the bolster at said b'er comprising an opstanding' plate section and a laterally projecting base plate element, said member being mounted in each pocket and fulsurfaces. Y e l 3. Ina railway car truck, the combination with a truck side frame having spaced vertical bolster guides, a truck bolster vertically movable between said guides, and truck springs .supporting said l bolster on the side frame; 'of a..l pocket inf said side frame at each side of the bolsterat said bolster guides, each pocket having a horizontal bottom wall; a friction plate in each pocket, said'plate --having a Vfriction surface in engagement withthe vororrespending outer side of the bolster; a fulcrum armonsaicl plateat the lower end thereof piv-V otally supported, onsaid bottom wall of the pocket;

l and a spring under compression, said spring being mounted'in said pocket Y(and. buttressed at its upper'end against the side frame and bearin'glat its lower endV on theupper sideof said f ulcrum arm. v Y

4. In a railway carY truck, the combiriation'with' a truclzside frame having. spaced vertical bolster guides, a truck bolster guided for vertical'movement between said guides having the Vertical outer side faces at yopposite sides thereof providedf with friction 4surfaces, and(V truck springs lsupporting said bolster ron the sideframe'; of pocklets'ein said sidegframe at opposite sides offthe bolster atsaid .bolster guides, each pockethaving', hori'z'ontal'top 3 0; l Y Y t 'and bottom 'wallsj'f a .friction rmemberI .inf each l pocket,keach member.- comprising). an upstanding friction plate section: and Q av. laterally projecting Vrfulcrum arm, said plate'sectioh bearing on. the

Vbolster guides; an L-shaped friction plate meme crumed on said base plate element; and, addi"Y 'tional springs'means V.buttressed against thefside bolster.v

corresponding friction'surfaceofthebolster; Yand Y a spring undery compression buttressed vagainst the top wall of said pocket and beari'ngrfon the, upper side of -said arm ltoetilt saidmember Vaga'instfthe

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