US 2687100 A
Description (OCR text may contain errors)
Aug. 24, 1954 5, BATH STABILIZEJR FOR RAILWAY CAR TRUCKS 2 Sheeis-Sheet 1 Filed March 12. 1949 Invenjr: Ge omeE' Ila h 1 wily.
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Aug. 24, 1954 3. E. DATH 2,687,100
STABILIZER FOR RAILWAY CAR TRUCKS Filed March 12, 1949 2 Sheets-Sheet 2 Geggge EJDalh.
g for stabilizing 2. Figure 4 is an end elevational View Patented Aug. 24, 1954 s M PATE OFFICE S TABILIZER RAILWAY CAR TRUCKS George E. ,Dath, Mokena,
Delaware assignor to W. H.
Chicago, 111,, a corporation of Application MarchlZ, 1949, Serial No.81;,114
1 Claim. (or. 105-197 This invention relates to improvements in railway car, trucks, and more particularly to means the action of the same.
One object of the invention is to provide in a railway car truck, simple and eflicient means for snubbing the action of the usual trucksprings and also yieldingly controlling relative lateral motion of the truck bolster and side frame of the truck.
A more specific object of the invention is to provide means of the character indicated in the preceding paragraph, comprising a friction clutch connected to the truck bolster, composed of spring pressed friction shoes and a cooperating wedge block, wherein the shoes have sliding frictional engagement with the truck side frame to snub the action of th truck springs, and the shoes and wedge block are laterally slidable on each other to frictionally resist lateral motion of the bolsterand side frame of the truck.
Other objects of the invention will more clearly appear from the description and claim hereinafter following.
In the accompanying drawings forming a part of this specification, Figure l is a side elevational view of one of the side frame members of a railway car truck and the associated truck bolster and springs, illustrating my improvements in connection therewith. Figure 2 is a vertical sectional view, on an enlarged scale, partly broken away, corresponding substantially to the line 2-2 of Figure 1. tical sectional view, partly broken away, corresponding substantially to the line 3 -3 of Figure of the right hand side portion of the truck bolster, illustrated in,Figure 1, with the friction shoes and springs omitted. Figure 5 is an elevational view of Figure 4, looking from right to left in said figure, said view being partly broken away. Figure 6 is an elevational view of the right hand friction shoe shown in Figure 2, looking from left to right in said figure. Figure 7 is an elevational view of Figure 6, looking from left to right in said figure.
In said drawings, I indicates one of the side frame members of a railway car truck, which is in the form of a casting, and has top and bottom members I I and I2, connected by vertically disposed sections l 3|3. As will be understood by those skilled in this art, the railway car truck includes two such side frame members Iii-J0,
a truck bolster l4, and two clusters of truck springs l-l5, one cluster of which is supported on the bottom member l2 of each side frame. Th opposite ends of the bolster I4 are guided between the sections l3.|3of the side frames and the bolster is supported by the two clusters of truck springs. The truck bolster supports the usual body bolster of the car in a well-known manner. As shown most clearly in Figures 1 and 3, the sections Iii-13 are inwardly offset at the upper ends thereof, as indicated at Iii-l6, to provide guide 6-! I6 between which the bolster I4 is slidable in vertical direction. The off- Figure 3 is a longitudinal verset portions [5-16 of the sections |3l3 include inner and outerwebs I1 and it which, together with similar webs on the top and bottom members I! and 12, form inner and outer side walls of, the casting. The inner surfaces of the webs l'l and I8 present vertically disposed, flat surfaces Iii-l9, which are utilized as friction surfaces in my improvements. As shown in Figures 2 and 3, the side walls of each side frame, at the upper ends of the sections I3-l3, are braced by horizontally disposed Wall portions 20-20 extending between the webs l1 and I8.
My improved mechanism comprises broadly a pair of friction shoes A-A in sliding engagement with the friction surfaces Iii-I9 of the webs I1 and I8 of the side frame of the car, a wedge B fixed to the bolster of the car and having wedging engagement with the shoes AA, and springs C-C pressing the shoes AA against the wedge B.
In carrying out my invention, I provide laterally outwardly projecting, Vertical flange 2 I--2I on the bolster M at opposite sides of each end of the same, the flanges at one end of the same only being illustrated in the drawing.
Each projecting flange 2| of the bolster extends into the space between the webs I! and 18 at the corresponding side of the side frame I fl and has a horizontal follower plate 22 at the lower end thereof formed integral therewith. The follower plate 22 projects fromopposite sides of the flange 2|, as clearly shown in Figures 2 and 5.
The wedge B is in the form of a block at the upper end of the flange 2!, being formed integral therewith and projecting from opposite sides of said flange, as shown in Figures 2 and 5. The wedge B presents inner, relatively blunt, wedge faces 23-23 of V-shaped, transverse section, respectively opposed to the oppositely projecting portions of the follower plate 22, these wedge faces extending transversely of the wedge.
The friction shoes A-A are of similar design, being disposed at opposite sides of the flange 2|. Each shoe A has a lateral inward enlargement 26 at its upper end, presenting an inner wedge face 24 of V-shaped, transverse cross section at the upper end engaging the corresponding V-shaped wedge face 23 of the wedge block B. On the outer sides, the shoes A-A have lengthwise extending, vertical friction surfaces 25-25, which are slidingly engaged with the friction surfaces l9-l9 of the webs H and is at the corresponding side of the side frame. The enlargements 2i326- of the shoes A-A present transverse, flat abutment faces 2l2l at the inner or lower ends.
The springs CC are disposed at opposite sides of the flange 2|, being interposed between the shoes A-A and the follower plate 22, each spring being in the form of a helical coil, having its top and bottom ends bearing, respectively, on the fiat abutment face 21 at the inner or lower end of the enlargement 26 of the corresponding shoe and the upper side of the follower plate 22, the abutment face 21 and the follower plate portion at the corresponding side of the flange 2| being preferably provided with centering projections 28-28 engaged within opposite ends of the springs. The springs CC are preferably under initial compression, thereby pressing the shoes against the wedge to spread the same apart into tight frictional engagement with the friction surfaces Iii-l9 of the side frame ll].
As will be evident, up and down movement of the bolster i4 is frictionally resisted by sliding frictional engagement between the spring pressed friction shoes A-A and the interior friction surfaces l9-l9 of the side frames of the car truck, thus effectively snubbing the action of the truck springs, both during compression and recoil thereof. Further, the lateral motion of the truck bolster is stabilized by the cushioning action of the spring pressed shoes AA, which are in sliding frictional engagement with the wedge faces of the Wedge block B, the shoes being displaced laterally with respect to the wedge B during lateral movement of the bolster with respect to the side frames, and being returned to centered position by the wedging action of the wedge B on the shoes A-A.
In a railway car truck, including side frames and a transversely extending bolster supported by springs on said side frames, the combination with opposed, interior, vertically extending friction surfaces on each side frame at opposite sides of said bolster, said surfaces lying in planes at right angles to the length of said bolster; of laterally projecting, vertical flanges on said bolster at opposite sides of each end of the same, each of said flanges at each end of said bolster extending between the opposed friction surfaces at the corresponding side of the corresponding side frame; a transverse follower at the lower end of each of said flanges projecting from opposite sides of the corresponding flange; a block at the upper end of each of said flanges formed integral therewith and having transverse wedge faces at its lower end; a pair of friction shoes at opposite sides of each of said flanges having vertically extending friction surfaces on their outer sides engaging the corresponding opposed friction surfaces of said corresponding side frame, said shoes having transverse wedge faces at their upper end in wedging engagement with the wedge faces of said block; and springs under compression interposed and reacting between said shoes and follower.
nereremes Cited in the file of this patent UNITED STATES PATENTS Number Name Date 2,283,332 Light May 19, 1942 2,295,553 Cottrell Sept. 15, 1942 2,347,463 Couch Apr. 25, 1944 2,378,229 Light June 12, 1945