US2290780A - Railway truck device - Google Patents

Description

July 21, 1942. CK 2,290,780

RAILWAY TRUCK DEVICE Filed May 20, 19:40 I 3 Sheets-Sheet l INVENTOR. CARL E.TACK

BY i I ATTORNEY.

c. E. TACK 2,290,780

RAILWAYTRUGK DEVICE Filed May 20, 1940 5 Sheets-Sheet 2 I [III III I INVENTOR. CARL E. TACK @Q I ATTORNEY.

July 21, 1942. c TACK RAILWAY TRUCK DEVICE Filed May 20, 1940 3 Sheets-Sheet 5 1 R 6/ O 2 V////4 m 9 5 4 4 a m- 7 FIG.7.

. Patented July 21', 1942 RAILWAY TRUCK nnvrcn Application May 20, 1940, Serial No. 336.172

8 Claims. (Cl. 105-190) The invention relates to railway rolling. stock, and more particularly to truck construction, and consists in all of the novel features hereinafter described and illustrated in the accompanying drawings.

Recent developments in the design of highspeed light-weight trains have utilized truck bolster springs of upright coils to provide more flexibility than has been common heretofore. Such bolster springs are likely to oscillate vertically swing hangers through a yielding device to insure movement of the hangers on their pivots and to prevent undesirable rocking of the bolster on the bolster springs. I

These and other detailed objects of the invention are attained by the structure illustrated in the accompanying drawings in which Figure 1 is a top view of the central portion of a. four-wheeled truck including -a lateral motion bolster, part of which is broken away for the purpose of clearly illustrating the parts beneath.o

Figure 2 is a vertical transverse section taken on the line 2-2 of Figure 1.

Figures 3 and 4 are detail vertical sections extending longitudinally of the truck and taken on the corresponding section lines of Figure 2.

section taken on the line 6-8 of Figure 7.

Figures 9 and 10 are detail vertical transverse sections taken on the corresponding section lines of Figure 7. Y

The truck illustrated in Figures 1 to 6 includes a truck frame carried by wheeled axles in the usual manner and having wheel pieces I and transoms 2, the frame supporting springs being indicated at 3, spring carrying equalizers being indicated at 4, andthe truck wheels being indicated at 5. Suspended from'the frame by pivot I pins 6 are swing hangers I, the hangers at each side of the truck being connected by cross bars 8 which support the ends of a spring plank 9 extending from side to side of the truck. Each end of the spring plank seats one or more upright coil springs I0 which support the truck bolster l l extending from side to side ofthe truck and including center plate structure I2 on which the vehicle body (not shown) is mounted in the usual manner.

The spring plank is provided with a recess or opening l3 extending longitudinally of the spring plank and transversely of the truck. A vertical rib l4 extends from side to side of this opening near one end thereof and a bracket l5 depends from the bottom of bolster II at a point spaced transversely of the truck a substantial distance Y from rib M.

A bolster and spring plank anchoring device has its opposite ends secured to rib l4 and bracket I5. This device is detailed in Figure-5 and includes a, rod l6 telescopingly received in a tube l|.- Rubber bushings l8 and [9 connect the rod to the tube. Preferably, each rubber bushing is bonded to innerand outer sleeves26 and 2|, respectively, which are welded at W to rod l6 and tube 11, respectively. The right hand end of rod 5 has a collar 22, fixed to the rod as by welding at W, and a movable collar 23 secured by a nut 24. Rubber discs 25 are arranged at opposite sides of the depending bracket flange lit: and are clamped against the flange by the tightening of nut 24. p

The opposite end of tubel'l carries a fixed collar 26 and a movable collar 21, and rubber discs 28 are clamped between collars 26 and 21 and a spring plank rib H. The clamping ,nut 29 is threaded upon a stud 86 secured in tube 11.

Preferably, the opposing faces of each pair of discs and the metal part clamped between them are of concavo-convex contour and preferably a rubber ring 3i surrounds the rod or tube where it passes through the metal rib I4 and bracket flange I5a thereby preventing metal to metal contact between the spring plank and bolster through the anchoring device. Preferably, bolster bracket [5 is made separately from the bolster and is bolted thereto to facilitate the application of the anchoring device, although this bracket may be made integral with the bolster if desired.

With the anchoring device applied, bolster bolster.

springs l may function to yieldingly support the Although their departure from anormal height would be accompanied by some resistance from the anchoring device, the latter may yield by the distortion of discs under the leverage provided by the length of rod l6 and tube l between elements 14 and I5. The resistance of disc 25 to such distortion will tend to dampen the action of bolster springs l0.

' Forces tending to move the bolster laterally of the truck will be transmitted to the spring plank and the lower ends of the swing hangers mainly .through the anchoring device, rather than through the bolster springs, the inertia of the swing hangers and their load being overcome by the resistance to shear. in rubber bushings l8, l9 and, to a lesser degree, by the resistance to distortion in rubber discs 25, 28. The pivotal movement of the swing hangers will avoid tilting of the bolster springs and excessive lateral movement of the bolster without corresponding movement of the swing hangers. Hence, the device may supplement or take the place of vertically disposed shock absorbers at the side of the truck connected to the bolster and truck frame.

' The invention contemplates an anchorage from the bolster to'the swing hanger supported structure and this anchorage does not depend upon the presence or use of the spring plank as described above. form of the invention in which a pair of anchoring devices 40 are secured to flanges 4|, integral with and depending from the bolster 42, and to flanges 43,depending from the spring seats 44 mounted on the cross bars 45 carried by the swing hangers 46 suspended at 41 from the truck frame transoms 48. I Y

The individual anchorage devices 40 correspond in structure, attachment and function to the devices previously described although somewhat shorter and duplicated at opposite sides of the truck center line. The rubber elements of devices 40 will be of the proper resilience to maintain the lower portions of the swing hanger structures in proper transverse spaced relation. Spring seats 44 have arcuate bearings 49 on cross bars 45, and this permits the spring seats to remain horizontal throughout swinging movement of hangers 46. If desired, the anchorage devices could be connected directly to cross bars '45 by providing a suitable pivotal or yielding joint between them.

The details of the anchor structure and the connections to the bolster and to the bolster spring carrying parts may .be varied substantially from the illustrated forms without departing from the spirit of the invention and theexclusive use of such modifications as come within the scope of the claims is contemplated.

What is claimed is:

1. In a railway truck, a frame, a bolster,- bolster carrying structure arranged to move laterally of said frame and including upright coil springs supporting said bolster, an elongated device extending transversely of the truck with one end yieldingly secured to said bolster only and with the other end yieldingly secured to said structure only whereby said bolster and structure may move vertically relative to each other due to the action of said springs, the ends of said device being movable towards and from each other, and said device including means yieldingly resisting such movements whereby a force tending to move said bolster transversely of the truck relative to said structure will be transmitted from said Figures 7-10 illustrate another 5 bolster to said structure independently of said springs.

2. In a railway truck, a bolster, supporting springs therefor, a spring plank for carrying said springs, said bolster and spring plank each having a vertically disposed web, said webs being spaced apart transversely of the truck, and an anchorage device extending between said webs and comprising telescoping members, means yieldingly resisting the telescoping movement of said members, the outer member having a pair of rubber discs and elements for clamping one of said webs between said discs and the inner member having a pair of rubber discs and means for clamping the other of said webs between the latter-mentioned discs.

3. A railway bolster anchorage device comprising a tube member, a rod member received therein, a rubber bushing surrounding said rod member with its inner and outer surfaces secured to said rod member and tube member respectively, means for connecting one end of one of said members to a truck bolster and means for connecting the other end of the other of said members to another truck part, the means for connecting one member end to an associated truck part including rubber elements to cushion forces transmitted between said truck part and said device laterally of the truck and to dampen vertical oscillations of said truck part relative to other truck parts.

4. A railway bolster anchorage device comprising an elongated tubemember, a rod member therein extending substantially the length of the tube member and projecting therefrom at one end, a relatively short rubber bushing near each end of the tube and rod members with its inner and outer surfaces secured to the rod member and tube member respectively, means for connecting one end of one of said members to a truck bolster, and means for connecting the other end of the other of said members to another truck part.

5. A railway bolster anchorage device as described in claim 4 in which the means for connecting one member end to an associated truck part comprises a pair of radial collars with opposing ,rubber discs and elements for clamping the truck part between the discs.

6. A railway bolster anchorage device as described in claim 4 in which the means for connecting one end of the device to an associated truck part comprises a pair of radially disposed rubber discs mounted on the rod member, and elements for clamping the truck part between said discs, and in which the means for connecting the other end of the device to an associated truck part comprises a pair of radially disposed rubber discs mounted on the tube member, and elements for clamping the corresponding truck part between said latter-mentioned discs.

7. A railway bolster anchorage device comprising a tube member, a rod member received therein, a rubber bushing surrounding said rod member with its inner and outer surfaces secured to said rod member and tube member respectively, means for connecting one end of .one of said members to a truck bolster and means for connecting the other end of the other of said members to another truck part, the means for connecting one member end to an associated truck part comprising a pair of radial collars with opposing rubber discs and elements for clamping the truck part between the discs;

8. In a railway truck, a frame, swing hangers pivotally suspended therefrom, springs carried by there being rubber elements connecting said parts 5 laterally of the-truck;

and placed in shear by relativemovement oi said parts transversely of the truck whereby lateral transverse forces may be yieldingly transmitted from said bolster through said device to the lower portions'of said hangers to eflect cushioned movement 01. said hangers with said bolster CARL E. TACK.

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