US2019312A - Railway truck - Google Patents

Description

Oct. '29, 1935.

w. c. KRAUTHEIM RAILWAY TRUCK Filed July 13, 1955 5 Sheets-Sheet 1 INVENTOR u M/m 00mm g g A ORNEY Oct. 29, 1935. w. c. KRAUTHEIM 2,019,312

RAILWAY TRUCK Filed July 13, 1933 5 Sheets-Sheet 2 I 9 I I I I 3 6 IIIIIIIIIIII/z fZ'y-f- /8 INVENTOR MW/mr 6 fwd/727277 ATT RNEY Oct. 29, 1935. w. c. KRAUTHEIM RAILWAY TRUCK Filed July 13, 1933 5 Sheets-Sheet 3 t: IIKL Z-ZJILtIZ.

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IL,.II\UIL Patented Oct. 29, 1935 UNITED STATES PATENT OFFICE RAILWAY TRUCK Application July 13, 1933, Serial N0. 680,222

11 Claims.

This invention relates to railway rolling stock and consists in novel truck construction particularly adapted for high speed service.

Heretofore high speed railway service has been rendered almost exclusively by long heavy vehicles requiring six-wheel trucks to distribute their weight on the rails. At present there is a tendency to lighten the weight of cars used in high speed service and this makes possible the use of four-wheel trucks, but four-wheel trucks as heretofore designed have not possessed the flexibility which is required for high speed service in which the truck springs and equalizing system must respond to track inequalities and side swings more smoothly and more rapidly than is necessary with slow speed trucks.

It is an object of the present invention to provide a four-wheel truck utilizing a double swing bolster in which the vertical offsetting of difierent parts of the truck frame and of the bolster are eliminated, thereby making possible a lighter construction and avoiding the setting up of eccentric forces in the bolster during the acceleration and retarding of the vehicle.

Another object is to provide structure as described in the above-mentioned object irrespective of the fact that a longer wheel base is used requiring a stronger and deeper bolster.

Another object is to provide a truck having a bolster at a lower level, thereby lowering the truck center plate and giving the vehicle a lower center of gravity. I

Another object is to provide a novel spring plank structure for trucks.

These objects and others are attained substantially in the structures illustrated in the accompanying drawings,'in which the bolsters are of box section construction including a center or body part mounting center plate elements and arms diverging from the center part for mounting on the bolster springs.

The truck frames illustrated utilize a pair of single transoms between the pedestals instead of the double transoms usually provided in this type of truck, and the bolster springs may be carried upon a pair of spring planks swingably suspended from the transoms and suitable brackets adjacent the ends of the same. In another form, spring planks are carried upon longitudinal bars connecting the lower extremities of single hangers depending from the transoms. In still another 4 form, a novel spring plank of substantially 1- section is provided.

In the accompanying drawings- Figure 1 is a top view of a truck illustrating one form of the invention, portions being broken away for clearer illustration.

Figure 2 is a side view of the same taken, partly in section, on the longitudinal line 2-2 of Figure 1.

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

Figures 4 and 5 are partial vertical longitudinal sections taken on the corresponding section lines of Figure 1. 10

Figure 6 is a detail vertical transverse section taken on the line 6-5 of Figure 1.

Figure '7 is a partial top view of a truck showing another form of the invention. a

Figure 8 is a side view of the same taken, partly in section, on the line 8-8 of Figure 7.

Figure 9 is a vertical transverse section taken on the line 9-9 of Figure 7.

Figure 10 is a top view of a truck showing another modification.

Figure 11 is a side view taken, partly in section, on the line ll-il of Figure 10.

Figure 12 is a vertical transverse section of the same taken on the line I2--|2 of Figure 10. Figure 13 is a partial top view of still another form of truck. a portion of the bolster being omitted.

Figure 14 is a side view of the 'same taken. partly in section, on the line ll-M of Figure 13.

Figure 15 is a vertical transverse section taken on the line I5-I5 of Figure 13.

The trucks shown in the drawings are of the four-wheel type with frames in general of integral box section and channel construction, and in Figures 1 to 6 the frame includes wheel pieces l with pedestals 2, end sills 3 and single channel section transoms 4 constituting the sole rigid connections between the wheel pieces intermediate the opposing pairs of pedestals. The frame is supported upon equalizers 5 resting upon the journal boxes, one of which is indicated at 8, by means of coiled springs I. Merging with the intersecting portions of the wheel pieces and transoms are brackets 8 for the bolster swing hangers 9, which are of the double type each having a pair of legs pivotally hung from spaced points on the supporting frame part. Spring planks l0 carried by the hangers 9 have spring seats Ilia supporting the transversely disposed elliptic springs II which, in turn, support the bolster.

The bolster is also of box section integral construction including the body or center part l2 mounting center plate structure I3, diverging arms l4 with seats IS on their undersurfaces resting on the elliptic springs II, and inside side 55 bearings l6 projecting laterally and upwardly from between the arms H. The upper walls of the extremities of the arms [4 resting on the elliptic springs are'depressed as at I! and extend beneath the hanger brackets 8.

The center part l2 and arms l4 of the bolster are substantially in horizontal alignment in order to eliminate tilting or eccentric forces on the bolster during acceleration or retarding of the rate of travel oi the truck and to simplify the truck. The lower wall of the center part is depressed at l8 beneath the center plate in order to strengthen this part of the structure. The top and bottom walls of the structure, with the exception of portions I6, I! and I8, are in horizontally parallel planes. Chafing plates I 9 and 20 are provided on the abutting faces of the transoms and bolster arms [4.

In Figures 7 to 9, the bolster is substantially of I-shape including center part 2| and longitudinally disposed arms 22 paralleling the wheel pieces 23 and from which project the side bear-- ings 24. The hanger brackets in the previous form are omitted and the spring planks 25 are supported upon longitudinal bars 26 hung from the lower extremities of single hangers 2'l pivoted to the transoms. The center part 2| and arms 22 are substantially horizontally aligned and the bottom wall of the center part is deepened at 28 beneath the center plate 29. Chafing plates 30 and 3| are provided on the transoms and brackets 32 projecting inwardly from the extremities of the arms 23.

In Figures 10 to 12, the bolster includes a deep center part 33 with loop-like extensions comprising diverging arms 35 having transverse extensions which merge with each other in upwardly extending side bearing forming members '58. Center part 33 and the portions 35 and 40 are substantially alined horizontally although the central part is deepened as at 34 and the portions 40 are reduced in height so as to extend} under the frame wheel piece 36. The bolster structure is of box-section substantially throughout and is supported on springs 39 mounted on spring planks 43 suspended from the wheel piece brackets 4| by swing hangers 42. Side bearing members 38 may be of any desired cross sectional shape.

In Figures 13 to 15, the spring plank is of I-shape including an elongated transverse body part 44 and longitudinal arms 45 paralleling the wheel pieces 46 and having bolster spring seats 41. The bolster is of similar general contour including central part 48 mounting center plate 49 and longitudinal arms 50. The spring plank is supported upon bars 5i extending beneath the longitudinal arms 45 and carried by the lower extremities of single hangers 52 pivoted to the transoms 53. Side bearings 54 project laterally from the ends of the bolster beneath the wheel pieces 46 and then extend upwardly above the level of' the wheel pieces.

In each of the forms of the: invention, the usual inner transoms are omitted, thus lightening the structure. The bolsters are of box section, which afiords greater strength for the amount of metal used than other shapes and is substantially free of vertical ofisets so that longitudinal forces between the center plate and transom chafing plates will be exerted in substantially'horizontal planes. Elimination of the transverse connections between the extremities of the bolster arms further lightens the truck. Various parts of the trucks shown as of integral construction may be formed of separate parts secured together by suitable means and these parts may be modified as to shape and in other respects. Moreover, in

a four-wheel truck the bolster may be deepened as desired for strengthening purposes without in- 5 terfering with axle structure which limits such deepening in six-wheel trucks.

Obviously, various details of the forms shown are not essential. These may be modified without departing from the spirit of the invention and 10 exclusive use of all such modifications as come within the scope of the appended claims is contemplated.

What is claimed is:

1. In a four-wheel truck, wheel pieces includ- 15 ing pedestals, a pair of transoms merging with said wheel pieces and constituting the sole connection between said wheel pieces intermediate said pedestals, a bolster between said transoms and including a center part having a center beargo ing and arms extending from said part longitudinally of the truck and terminating inside of said transoms, said part directly beneath said center bearing being deepened beneath the level of the tops of the truck axles to reinforce said part, and g5 elements supporting said arms from said transsoms and wheel pieces.

2. In a four-wheel truck, a frame including wheel pieces with opposing pairs of pedestals and a pair of transoms constituting the sole struc- 30 tural connection between said wheel pieces intermediate said pairs of pedestals, and a unitary double bolster structure swingably supported from said frame and located entirely between said transoms, the center part of said structure be- 35 ing deepened beneath the level of the tops of the truck axles to reinforce said part.

3. In a four-wheel truck, a frame including wheel pieces with opposing pairs of pedestals and a pair of transoms constituting the sole struc- 40 tural connection between said wheel pieces intermediate said pairs of pedestals, a pair oi. spring planks swingably carried by said frame, springs thereon, and a bolster with diverging arms carried by said springs and spanning the space be- 45 tween them in a substantially horizontal box-like section.

4. A railway truck bolster including a center part extending transversely of the truck and diverging arms arranged at their ends for supporting springs, and projecting members intermediate said arms forming side bearing supports, said center part and said arms and members comprising a horizontally aligned structure.

5. In a railway truck, a frame including wheel 55 pieces and transoms and elements for supporting swing hangers, and a bolster including a center part with center plate structure and portions at each end of said center part spaced longitudinally of the truck and carried from said ele- 80 ments, the upper surfaces of said spaced portions being depressed and passing beneath said elements and said center part depending beneath the level of the lower surfaces of said portions.

6. In a railway truck, a frame, a pair of longitudinally spaced swing hangers carried at each side of said frame, a bar connecting the hangers of each of said pairs, a pair of spring planks carried by said bars, and a double bolster carried on said spring planks. 7

'7. In a four-wheel truck, a frame including spaced transoms, single swing hangers depending from each of said transoms adjacent the ends thereof, a bar connecting the hangers at each side of said frame, a pair of spring planks carried by said bars, and a bolster with diverging arms carried by said spring planks.

8. In a railway truck, a frame, a spring plank including a body part and diverging arms at each end thereof and carried from said frame, and a bolster including a center part with center plate structure and diverging arms supported by the diverging arms of said spring plank.

9. In a railway truck, a frame including wheel pieces, and a bolster including a center part with center plate structure, oppositely extending arms carried from said frame and terminating inside said wheel pieces, and side bearing elements projecting from between said arms beyond said wheel pieces.

10. In a railway truck, a frame, a pair of iongitudinally spaced swing hangers carried at each side of said frame, a bar connecting the hangers of each of said pairs, a pair of longitudinally spaced bolster springs carried by each of said bars, and a bolster carried on said springs.

11. In a railway truck, a frame including spaced transoms, single swing hangers depending from each of said transoms adjacent to the ends thereof, a bar connecting the hangers at each side of 10 said frame, a pair of longitudinally spaced bolster springs carried by each of said bars, and a bolster carried on said springs.

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