US2097277A

US2097277A - Railway truck

Info

Publication number: US2097277A
Application number: US102645A
Authority: US
Inventors: Einar G Hallquist
Original assignee: General Steel Castings Corp
Current assignee: General Steel Castings Corp
Priority date: 1936-09-26
Filing date: 1936-09-26
Publication date: 1937-10-26
Anticipated expiration: 1954-10-26

Description

2 Sheets-Sheet 1 .Vmwom Oct. 26, 1937. E. G. HALLQulsT RAILWAY TRUCK Filed Sept. 26, 1936 Oct. 26, 1937. E G, HALLQUlsT 2,097,277

RAILWAY TRUCK Filed Sept. 26, 1936 2 Sheets-Sheet 2 fr; Ven for' Figure 1.

Patented Oct. 26, 1937 UNITED STATES nmwnr Tn'Ucx Einar G. Hallquist, Wallingford, Pa., assigner to General Steel Castings Corporation, Granite City, lll., a corporation ot Delaware Application september 2e, 193s, serial No. 102,645

11 Claims.

'I'he invention relates to railway rolling stock and consists in a truck having a lateral motion bolster and spring plank mounted upon an auxiliary lateral motion support `on the truck frame.

The main object of the invention is to improve the riding qualitiesof high speed, light weight cars, particularly such as are used in articulated car trains.

Additional objects of the invention are to facilitate the mounting of a plurality of sets of springs between the ca'r frames and load supporting holsters, to' lighten the truck structure, to maintain widely spaced points of support for springs and lateral motion devices, and to avoid undue play of the parts longitudinally of the truck.

These and other detail objects of the invention will be apparent to those skilled in the art upon consideration of the following description and reference to the accompanying drawings, in which- Y Figure l is a top view of one longitudinal half of a four-wheel truck embodying the invention, a portion of the structure being broken away to better illustrate the parts beneath.

Figure 2 is a side elevation of the same.

Figure 3 is a vertical longitudinal section taken on the line 3-3 of Figure 1.

Figures 4-and 5 are vertical transverse detail sections taken onthe corresponding section lines of Figure 1.

Figure 6 is a detail side elevation and section of a bridge or auxiliary bolster member of the truck taken approximately on the line 6-6 of The truck frame preferably consists of a onepiece casting including side frames or wheel pieces I with depending pedestal jaws 2, transverse transoms 3, and other integral elements referred to in detail below. Each journal box 4- carries an individual yoke 5 which mounts coil i springs 6 supporting the truck side frame. This manner of supporting the side frame is known in the art and in itself does not comprise the present invention.

Wheel pieces I preferably are of box-section and depending from the lower walls thereof are lugs 'I from which links 8 are pivotally suspended to swing transversely of the truck. Lugs 1 and links 8' are arranged in spaced pairs on each wheel piece and each pair of links is connected by a short cross bar 8. Each pair of links at one side of the truck cooperate with the corresponding pair of links at the opposite side o1' the truck to carry a cross beam or auxiliary spring plank I 0. Each end portion of'each beam I0 mounts one or more coil springs Il and a rectangular bridge or auxiliary bolster-indicated generally at I2 is carried at its four corners by springs II.

Bridge member I2 includes longitudinal members I3 preferably of inverted U-section and extending for the major part of their length alongside of truck frame wheel pieces I and at substantially the same level. The ends of the bridge sides I3 extend downwardly and form caps I4 for springs I I. The transverse members I5 of bridge I2 are at a lower level than the side members I3 and parallel and approximate the level of truck frame transoms 3.

Member I2 pivotally suspends a swing hanger I6 from each corner, the pin bearings for the swing hangers being indicated at I'I (Figure 6) A main spring plank I8 extends from side to side of the truck and has flared end portions I9 pivotally supported by the llower ends of hangers I 6. Leaf springs 20 are mounted upon the ends of spring plank I8 in the well known manner and project outwardly. beneath side frames I and beyond swinging links 8.

The truck main bolster 2| is mounted uponsprings 20 and projects outwardly beneath bridge members I3, wheel pieces I and springs 20, as best indicated in Figure 4, to mount side bearing arms 22 which 'are pivoted on the ends of the bolster and are provided with spaced bearings 23 and 24 for engaging corresponding end portions of two car bodies (not shown) of an articulated unit. Bearings 23 and 24 are shown at diierent distances from the side bearing arm pivot 25 and this is an arrangement which may be adopted when the two car bodies of the articulated unit are of different weights, the heavier body being supported by bearing 23 nearest the pivot pin and the lighter bodyA being supported at 24 on the longer arm of the side bearing.

Bolster 2| includes a deep center bearing 26 comprising the main support for the internested center plates (not shown) of the two car bodies of the articulated unit. Bolster 2I also includes an upstanding rib 21 projecting into the space between the inner and outer Walls of'bridge member I3 and adapted to engage said walls to limit lateral movement of the bolster relative to the bridge member. Lateral motion of the bridge member on its suspension links 8 will be limited r by engagement of the bridge side members I3 with the inner faces of wheel pieces I.

Depending from each wheel piece 4I at opposite sides of the bolster are brackets 28 and these brackets and the opposing side walls of the bolster have elements 29 adapted to engage each other to limit movement of the bolster longitudinally of the truck frame.

The inwardly facing walls of transoms I and the opposing portions of bridge member I 2 include opposing elements l0 adapted to engage each other to limit movement of the bridge member longitudinally of the truck.

Preferably elements 28 and 30 comprise renewable chailng plates whereby the play between the corresponding parts may be maintained throughout the life of the truck and irrespective of wear on the abutting parts.

The suspension of beams I0 from the wheel pieces independently of each other and the spring mounting of the four corners of the bridge member i2 on the independently swinging beams i0 provide a very exible suspension for the bridge member and this flexibility is carried into the main spring plank support by the latters hangers |81 Accordingly the load on the truck'is very flexibly supported and the shocks or blows due to track irregularities will be absorbed largely by the suspension structure instead of being transmitted to a bolster and its load. Thrusts upon a pair of wheels at one end of the truck will not be transferred directly to the transverse beams i0 near the other pair of wheels. In other words, the shocks and vibrations which cause jiggling of the truck frame are localized instead of being extended to other parts of the truck and Ato the car body.

The arrangement of spaced hangers on the same side of the truck results in substantial clearance for the bolster and main spring plank which may project below the wheel piece and extend outwardly from the vertical plane of the same.

The suspension of links I from the wheel pieces instead of from the transoms, as has been done previously, lengthens the distance between the supported ends of the beams carried by these links and tends towards a more level lateral movement of the bolster. This arrangement also facilitates lightening of the truck because oi' the possible lightening of the transom structure.

It will be understood that each pair of double links 8 may be replaced by a single link centered in the corresponding beam lli and that coil springs, elliptic springs, rubber blocks, and other types of spring structures may be substituted for each other. The contours and cross sections and other details of the parts may be varied substantially without departing from the spirit of the invention. The exclusive use of all of the above variations and other modifications in the structure coming within the scope of the claims is contemplated.

I claim:

l. In a railway truck, a truck frame, spaced members extending from side to side of the truck and mounted on said frame to move.laterally thereof independently of each other, a bridge between and yieldingly mounted on said members, and a bolster yieldingly supported from said bridge, there being opposing elements on said truck frame and bridge and on said truck frame and bolster functioning independently of each other to limit movement of said bridge and bolster longitudinally of the truck frame.

2. In a railway truck. a frame including wheel pieces and transverse transoms, spaced beam members extending from side to side of the truck and mounted on said frame to move laterally thereof independently of each other, a bridge yieldingly mounted on said beam members, and a bolster yieldingly supported from' said bridge, there being opposing elements on said transoms and bridge limiting movement of said bridge longitudinally of said frame and there being opposing elements on said wheel pieces and said bolster limiting movement of said bolster lor.- gitudinally of said frame.

3. In a railway truck, a truck frame, spaced members extending from side to side of the truck and mounted on said frame to move laterally thereof independently of each other, a bridge between and yieldingly mounted on said members, and a bolster yieldingly supported from said bridge, said bridge and bolster having opposing horizontally facing elements limiting relative lateral movement of said bridge and bolster.

4. In a railway truck, a truck frame, spaced members extending from side to side of the truck and mounted on said frame to move laterally thereof independently of each other, a bridge between and yieldingly mounted on said members, and a bolster yieldingly supported from said bridge, said bridge including a part extending longitudinally ,of the truck and having spaced sides and said bolster including a projection extending upwardly between said sides to limit relative movement of said bridge and bolster laterally of the truck.

5. In a railway truck, a truck frame, spaced members extending from side to side of the truck and mounted on said frame to move laterally thereof independently of each other, a bridge between and yieldingly mounted on said members, and a bolster yieldingly supported from said bridge, said bridge including an inverted U-section extending longitudinally oi' the truck and said bolster including a projection extending upwardly into said, inverted U-section and opposing the sides thereof to limit relative movement of said bridge and bolster laterally of the truck.

6. In a railway truck. a truck frame, spaced members extending from side to side of the truck and mounted on said frame to move laterally thereof independently of each other, a bridge between and yieldingly mounted on said members, and a bolster yieldingly supported from said bridge, said bridge and bolster having opposing horizontally facing elements limiting relative lateral movement of said bridge and bolster and said bridge and frame having opposing horizontally facing elements limiting lateral movement of said bridge relative to said frame.

7. In a railway truck, a truck frame including wheel pieces, spaced links pivotally suspended from each of said wheel pieces, spring planks extending from side to side of the truck and swinging independently of each other from respective pairs of said links, springs thereon, a bridge extending upwardly from and between said springs and alongside of the corresponding wheel piece,

a spring plank suspended from said bridge, spring structure thereon projecting laterally beneath said wheel pieces, and a load supporting bolster mounted on said springs and extending beneath said bridge.

8. In a railway truck, a truck frame including wheel pieces, spaced links pivotally suspended from each of said wheel pieces, spring planks extending from side to side of the truck and swinging 'independently of each other from respective pairs of said links, springs thereon, a rectangular bridge member with each corner supported byan individual one of said springs, swing hangers pivotauy suspended from me sides of said bridge 76 member at points spaced from the ends thereof, a spring plank with spring structure and bolster carried by said swing hangers and extending beneath said bridge member sides, and wheel pieces.

9. In a railway truck, a truck frame including wheel pieces, links pivotally suspended from the bottoms of said wheel pieces to swing transversely of the truck, beams extending from one side of the truck to the other and carried by said links, a bridge extending alongside of and at the level of said wheel pieces with depending ends carried on said beams, swing hangers suspended from said bridge, a spring plank extending across the truck at approximately the .same level as said beams and located between the same and carried by said swing hangers, and a bolster yieldingly supported on said spring plank and projecting beneath said wheel pieces.

10. In a railway truck, a truck frame including wheel pieces, links plvotally suspended from said frame to swing transversely of the truck, beams carried by said links and extending from side to side of the truck and projecting beneath said wheel pieces, a bridge extending between and carried by said beams, hangers pivotally suspended from said bridge to swing transversely of the truck, a spring plank carried by said hangers and extending from side to side of the truck and projecting beneath said wheel pieces, and a bolster yieldingly supported on said spring plank and projecting beneath said wheel pieces.

11. In a railway truck, a truck frame including wheel pieces, links pivotally suspended from said frame to swing transversely of the truck, beams carried by said links and extending from side to side of the truck and projecting beneath said wheel pieces, a bridge extending between and carried by said beams, hangers plvotally suspended from said bridge to swing transversely of the truck, and a bolster extending from side to side of the truck and projecting beneath said wheel pieces and supported by said hangers.

EINAR G. HALLQUIST.