US2378538A - Railway car truck - Google Patents

Description

i l'Patented June `19,` 1945 RAILWAY CAR TRUCK -George E. Datli, Mokena, Ill., assignor to W. H.

Miner, Inc., Chicago, Ill., a corporation of Dela- Ware Application `June 29, 1'944, serial No. 542,676

s claims. (ci. 18s- 33) This invention relates\to'improvements in railway car trucks.

One object of the invention is to :provide in a railway car truck means for snubbing ordampening the action of the truck springs, comprising friction means attached to and actuated by a member of the brake rigging of the car to engage the bolster of the truck andV frictionally op` pose vertical -movement thereof when the brake shoes of the brake mechanism are releasedfrom engagement with the car wheels.

l Amore specific obiectof the invention is to provide in a railway car truck comprising a, body bolster and springs supporting the bolster, fric-.

tion means in the form of shoes or blocks having frictional engagement with thelbolster to oppose Vertical movement thereof, thereby snubbing the action oi' the truck springs, wherein the friction shoes or blocks are carried by'and xed to the usual brake beam of the brake rigging of the car whereby when the brakesare released by movement of the brake beam in a direction toward the bolster, the shoes are brought into frictional engagement with the bolster to provide the desired snubbing action.

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

In the drawings forming a part of this'specification, Figure 1 is a side elevational view of a portion of a railway `car truck, illustrating my improvements in connection therewith. Figure 2 is a -top plan View of Figure 1, showing one side portion only of the truck, said view being partly broken away. Figure' 3 is a vertical sectional view, lengthwise of the car, corresponding substantially to the line 3 3 of Figure 2 and illustrating a modied form of the invention. Figure 4 is a transverse, vertical sectional view, corresponding substantially to the line 4-8 of. Figure 1, said view being broken at the central portion of the railway car truck. y

In said drawings, I il indicates one of the side frame members of a railway car truck of the wellknown "unit type. The side frame Ill, as shown,

-is in the form of a casting and has top and bottom members II and Il.l connected by spaced, vertical sections I3-I3 forming guides for the truck bolster. On the inner side of each side frame, guides I 4-I4 are provided to the front and rear of -the opening between the spaced, vertical sections I3-I3. The guides I 4-I4 are former by inwardly extending, top and bottom anges I5 and I6 and connecting end section I 1 projecting from the inner side wall of the side frame at the bottom member I2 thereof. The flanges I5 and I6 incline upwardly in directions toward the front and rear of the truck, thuspresenting inclined guide channels closed at their outer ends.

As shownzmost clearly in Figure 4,- the truck includes twoV side frame members IU-III located at opposite sides of the truck. The truck includes, in addition, a truck bolster I8, as shownin `Figures l, 2, and 3, and wheels I9-I9 atyopp'osite sides of said truck. The bolster I 8 has its `opposite ends guided between .the vertical sections I3-I 3 of the truck side frames ill-I0 and is supported by the springs 2li- 2b.v As most clearly shown in Figure l, the sections Iii-I are 'inwardly'oiset'at their upper end portions'to provide guides 2 I-zI which cooperate with guide seats 22-22 at the sides of the bolster i 8.Y The truck illustratedin the drawings is of the spring'lplankless type and the truck springs are supported directly on the bottom members I2--I2 of the side frames Ill-I0; the I usual spring plates 'being employed at the top and bottom of each' cluster of "truck springs.

The lbrake beams of the brake rigging of the car, associated with each truck, are indicated by 23-23, These brake beams are disposed in the truck respectively in fron-t of and to the rear of the bolster I 8, that is, are locatedv at the front and rear portions of the truck. Brake shoes 2li-24 cooperate with the wheels Ill-I 9 in a wellknown manner, said shoes being carried by the brake beam heads 25-25, of Well-known design, fixed to the brake beams 'i3-23. beamv 23 includes the usual compression and tension members 26 and 27, the brake beam shown being of the well-known truss construction which has the compression and tension members thereof separated at the middle by a strut or fulcrum, to which the truck brake lever is attached for actuating the beam to apply and release the brakes by moving the brake shoes into and out of engagement with the brake wheels.

Incarrying out my invention, I provide friction shoes A-A fixed to opposite ends of the brake beams 23--23 of the car truck and frictionally engaging the truck lbolster to-retard vertical movement thereof, thus snubbing the action of the truck springs.

Referring to the embodiment of the invention illustrated in Figures 1, 2, and 4, and the modification illustrated in Figure 3, itis pointed out that the construction and design involved is the same in Figure 3 as in Figures 1, 2, and 4, with the exception that a tension spring B is used for forcing the friction shoes A against the truck bolster.

Each friction shoe A is preferably in the form Each brake the corresponding en'd wall or platemember 28, a transverse bottom wall 29 extending outwardly from the lower end of the wall 29, and spaced webs or side anges 30-33 connecting the end and bottom walls. At the outer side of the casting, a transverse web 3|, parallel to the bottom wall, is provided between the side flanges 39-30 and above said bottom wall. The web 3l is connected at its inner end to the bottom wall 29 and the anges 30-30 by a vertical wall section 32. Av laterally outwardly projecting guide lug 33 is provided at the bottom of the shoe A adapted to slide in the guideway I4 of the truck side frame I at the corresponding side ofthe truck, the lug 33 being hollow and having top and bottom walls 34 and 35, which are continuations of the web 3l and the bottom wall 29, and a verti-v cal end wall 33 connecting the top and bottom walls 34 and 35. The opening of the hollowlug is continuous with the opening between the web. 3l and the bottom wall 29 of the shoe, a continuous socket I9 is th'us provided adapted to receive of the member 29 of the brake beam 23.

The friction shoes A are four in number for each truck, said shoes being arranged in pairsv at opposite ends of the brake beams 23-23, the members of each pair being disposed at opposite sides of the truck bolster I8 with the plate members 28-28 thereof adapted to engage the opposed vertical side faces of the bolster. 'I'he shoes A--A at Opposite ends of each brake beam are mounted on the ends of the compression member 26 of said beam, the ends of the member 29 being seated in thesockets 40-49 of the shoes.

The brake beam heads 25- 25 at opposite ends oi each brake beam are provided with spaced, attaching flanges 31-31 for mounting the same on the brake beam, the flanges 31-31 of each brake beam head embracing the web 3| and the wall 29 of the corresponding friction shoe A therebetween. Any suitable means may be employed for securing the brake beam heads 25 and the friction shoes A to the brake beam 23. As shown in the present instance, these parts are secured by rivets 38-38 extending through the flanges :i1-31 of the brake beam heads 2s, the web 3| andthe bottom wall 29 of the friction shoe A,

andthe corresponding end of the compression member 26 of said brake beam.

As will be evident, the shoes A--A at each side frame I0 of `the truck embrace the truck bolster I8 at opposite sides and move in unisn with the brake beam away from and toward the bolster as the brakes are respectively applied and released. The releasing action of the brakes thus brings the\ friction shoes A-A 'into tight frictional contact with the bolster to resist vertical movement thereof and snub the action of the truck springs.

Referring to the modification of the friction snubber as shown in Figure 3, the spring B connects thevfriction shoes A-A at opposite sides 0f the bolster, the shoes being provided with inwardly projecting eyes 39-39 to which the opposite ends of the spring are anchored, the

2,378,538 of a casting including a vertically disposed end it is found desirable to increase the snubblng action.

I have herein shown andv described what I now consider the preferred manner of carrying out my invention, but the same is merely illustrative and I contemplate all changes and'modications that come within the scope of the claims appended hereto.

I claim:

1. In arailway car truck including side frames at opposite sides of the truck, wheels carried by said truck, a truck bolster vertically guided in said side frames, and truck springs supporting said bolster on the side frames,l the combination with brake beams at opposite sides of said bolster having brake shoes cooperating with the truck wheels, said beams being movable away from and toward the bolster as the brakes are applied and released; of friction shoes at opposite sides of said bolster iixed to the brake beams and movable applied; of a friction shoe-fixed to saidbrake' beam, said shoe having a friction surface,l said shoe being moved into engagement with the side of the bolster by movement ci.' said beam'toward the bolster and thereby retard vertical movement of the bolster and snub the action of the truck springs.

3. Ina railway car truckV including a side frame, a truck bolster guided forl vertical movement in said side frame, and trucksprings supporting said bolster on the side frame, the combination with a brake beam laterally movable toward and away from the side of the bolster, when the brakes are respectively released and applied; of a friction shoe having a friction surface engageable with said bolster, said shoe being fixed to the brake beam and movable therewith toward the bolster to engage the shoe with the bolster and retard .vertical movement of the latter to snub the action l-of the truck springs; and cooperating guide means on said shoe and side frame for guiding the shoe and brake beam.

4.. In a railway car truck including a side frame, a truck bolster guided f or vertical movement in s'aid side frame, and truck springsy supporting said bolster on the side frame, the combination with a brake beam laterally movable toward' and away from the side of thebolste'r, when the brakes are respectively released and applied;

of a friction shoe having a friction surface engageable with said bolster, said shoe being xed to the brake beam and movable therewith t0- ward the bolster to engage the shoe with the bolster and retard vertical movement of theflatter to. snub the action of the truck springs; a laterally extending guideway on thesideframe; and a guide lug on said shoe slidably guided in said guideway.

y 5. Ina' railway car truck including a side frame, va truck bolster guided for vertical movement in said side frame, and trucksprings supporting said bolster on the yside frame, the com- :,svause 3 bination with a brake beam laterally movable Y toward and away from the side of the bolsterl when the brakes are' respectively released and applied; of a friction shoe having a friction surface engageable with said bolster, said shoe being fixed toxthe brake beam and movable therewith toward the bolster to engage the shoe with the bolster and retard vertical movement of the latter to snub the action of the truck springs; a laterally extending guideway on said side frame. said guideway being inclined upwardly and out- Wardly; and a lug on said shoe slidably guided in said guideway.

6. In a railway car truck including side frames at opposite sides of the truck, wheels carried `by said truck, a truck bolster vertically guided in said side frames, and truck springs sup'- porting said bolster on the side frames, the combination with brake beams at opposite sides of frame, a truck bolster guided for vertical movement in said side frame, and truck springs supporting said bolster on the sideframe, the combination with a pair of brake beams respectively at opposite sides of the bolster, saidbeams being laterally movable away from and toward said bolster when the brakes are 'respectively applied and released; of a friction shoe fixed to each brake' beam, said shoes having friction surfaces,

said shoes being movable into engagement with v said shoes against the bolster.

8. In a railway car truckl including a side frame, a truck bolster guided for vertical movement in said side frame, and truck springs supporting said bolster on the side frame, the comsaid bolster having brake shoes cooperating with bination with. a pair of brake beams respectively the truck wheels, said beams being movable away from and toward the bolster as the brakes are applied and released; of friction shoes at oppo-Y site sides of said bolster fixed to the brake beam r and movable therewith toward the bolster to engage the same when the brakes are released, said shoes having friction faces engageable with op- 7. In a railway car truck including -'a` side at opposite sides of the bolster, said beams being laterally movable away from and toward said bolster when the brakesare respectively applied and released; of a friction shoe xed to each brakeA beam, said shoes having friction surfaces, said shoes being movable into engagement with op posite sides of the bolster by movement of said brake beamstoward the bolster to retard vertical movement of the latter and snub the action of the truck springs; and a tension spring connecty ing said-shoes and forcing Ithe same against the holster. ,n v GEORGE E. DATH.

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