US2142426A - Stabilizing device for car trucks - Google Patents

Description

Jan. 3,1939. aww/EEB. 2,142,426

STABILIZING DEVICE FOR CAR TRUCKS` Filed sept. 28, 193e Z/ /Z INVENTOI?.

Patented Jan. 3, 1939 UNITED sTATEs PATENT ol-FICE STABILIZING DEVICE FOR CAR. TRUCKS Edwin W. Webb, Chicago, Ill., assignor to Standard Car Truck Company, Chicago, Ill., a corporation of New Jersey Application September 28, 1936, Serial No. 102,937

8 Claims. (Cl. 105-193) This invention relates to stabilized car trucks. It is a general object of the invention to provide a novel and improved stabilized car truck wherein it is unnecessary to utilize a spring plank between the opposite side frames of the truck and wherein cumulative periodic action of the bolster springs is-prevented.

Another object is to provide improvements f my invention disclosed in U. S. lLetters Patent No. 1,894,386 entitled Spring damping truck granted in my name on January 17, 1933.

A more specic object is to provide, in a car truck incorporating stabilizing wedges interposed between the truck bolster and the bolster columns of a side frame, means to prevent uneven wear of the wedges.

Another specic object is to provide, in a stabilized truck ofthe general construction disclosed in my aforementioned patent, means for retaining the stabilizing wedges assembled with the bolster as the bolster is disengaged from. the side trame.

'I'he objects and advantages oi' the invention will more fully appear from the following description, made in connection with the accompanying drawing, wherein like reference characters refer to the sameor similar parts throughout the various views, and in which,

Pig. 1 is a view partly in side elevation and partly in vertical section of a portion of a car truck embodying the invention;

Fig. 2 is a horizontal section taken substantially on the line 2--2 of Fig. 1, as indicated by the arrows, but showing parts of the bolster broken awayto more clearly illustrate the construction or other parts;

Fig. 3 is a view in side'elevation looking outwardly toward the inner surface `of onek of the outer wedges; v

Fig. 4 is a` vertical section taken on the line 4 4 of Fig. 3, as indicated by the arrows;

Fig. 5 is a plan view of one of the inner wedges;

Fig. 6 is a section taken on the line Ii-Glof Fig. 5, as indicated by the arrows; and

Fig. 7 is a view in side elevation of the inner wedge as shown in Fig. 5.

-Referring to the drawing, portions of a side frame l of a car truck are illustrated and this side frame is provided with the usual bolster opening` l, the sides of which are defined by bolster columns Il. The lower partsof these bolster columns Il are spaced farther apart than the upper parts oi these columns, so as to pervinit of ready removal of the bolster II which is normally received within the bolster opening 9 between the upper portions of the columns I0. The truck bolster I I. is supported near its ends by standard A. R. A. bolster springs I2 from the side frames 8, these springs resting on lower bearing plates I3 mounted on the spring seats` 5 of `the side frames. The outer springs I2 of the spring group are laterally spaced from the inner springs I2 a greater distance than' usual for a purpose presently to appear. 'Ihe bolster I I is equipped with the usual inner and outer stop 10 flanges I4 and I5 respectively which cooperate with the sides of the upper portions of the bolster columns I I to prevent anything more than the most limited lateral motion of the bolster II relative to the side frames.

In accordance with the invention, heavy wear plates I6 are riveted or otherwise secured to the upper portions of the faces of the bolster columns I0. Adjacent these wear plates the sides of the bolster II are provided with recesses I1 20 which project inwardly from the vertical side outlines of the bolster to a web Il disposed `chieiiy in a vertical plane and projecting upwardly from the bottom of the bolster to an overhanging web or iiange I9 at the top oi' the bol- 25 ster. Directly opposite the wear plates I6 the central sections of the webs Il are provided with recessed ball contours 2li of substantially half spherical shape. The outer surfaces of the central sections of the webs I8 immediately ad- 30 jacent the yball contours 2l lie in planes which are diagonally inclined upwardly and outwardly towards the sides of the bolster.

Received within each recess I'I of the bolster between a web Il and the adjacent wear plate I6 are a pair of cooperating stabilizing members which comprise wedgesv 2| and 22 respectively. The outer wedges 2l have heavy-.vertical outer surfaces which bear against the wear plates I6 for sliding movement relative thereto. The inwardly facing surfaces of the outer wedges 2| incline upwardly and outwardly at an acute angle to the outer surfaces of the outer wedges. The bottoms of the outer wedges 2| are provided with downwardly projecting bosses Ila which are encircled by the upper ends of coiled springs 23 which bear at their lower ends on the bearing plates I3, these bearing plates being equipped with bosses Ila to receive the lower ends of the springs 23. These springs 23 are 50 located intermediate the outer and inner springs I2 of the bolster spring group and the outer and inner springs oi' this group are more widely spaced than usual to permit reception oi' the springs 23-between the same. The springs Il which may be called stabilizing springs in contradistinction to the bolster springs i2 are much lighter and of materially less capacity than the bolster springs i2. The inner Wedges 22 have heavy inwardly projecting half spherical-shape projections forming ball surfaces 22a which are received within the ball contours 2B of 'the bolster. These inner wedges also have front and rear flanges 22h projecting from plane surfaced faces contacting the inclined faces of the outer wedges 2| and these flanges overlie front and rear portions of the outer wedges 2| so that the outer wedges are in reality received within channels in the inner wedges.

The inner wedges 22 are, of course, held from lateral movement relative to the truck lengthwise of the bolster by reason of the reception of the half spherical-shape projections 22a within the ball contours 2U of the bolster. The 'outer wedges 2| in turn are held from lateral movement relatlveto the truck longitudinally of 'the bolster by the anges 22h of the inner wedges 22. OI course, the front and rear portions of the web I8 of the bolster will also prevent lateral displacement of the wedges..

To retain the outer and inner Wedgesi and 22 respectively, in assembled position relative to the bolster` when' the bolster is removed from the side frames, diagonally inclined slots 2lb are provided in the outer wedges 2| extending from front to rear of the same and across pins .2d carried by the front and rear portions of the webs i8 o! the bolster extend across the recesses i l and project through the diagonalslots 2lb. These slots 2|b are of sutcient length to permit the necessary upward and downward sliding movement Vof the outer wedges 2| relative to the wear plates I6. Y

When the truck embodying the invention is in use cumulative periodic action of the bolster springs is prevented by reason of the use of the outer and inner wedges 2| and, 22 respectively and the springs 23. .As the bolster H-tends to lower relative to the side frames 8 during compressive action of the bolster springs l2, the inner wedges 22 tend to slide downwardly on the outer wedges `2| but this sliding movement is resisted by the springs 23. Accordingly, the pairs of wedges 22 and 2| are brought into tighter wedging relation between the wear plates I6 and the bolster and while the outer wedges 2| may slide relative to the wear plates i6, the frictionai resistance oiered by the wedges -to this s liding movement dampens the action of the bolster springs I2 sov as to breakdown the natural harmonic action of these springs and prevent cumulative periodic action of the same as the truck over rail joints at a certain speed. By reason of the use of the ball sections 22a on the inner wedges and the ball contours 20 in the bolster even pressure is applied from the bolster to the inner wedges 22 at all times irrespective ot the particular position of the bolster relative to the side frames. Thus if one en d of the bolster should move slightiy ahead `of the other end of the same, even pressure is applied to the wedges. There is vno tendency for the wedges to wear unevenly by reason of this fact as might otherwise be the case if the universal connection between the inner wedges and the bolster were not made.

While in the embodiment shown the inner wedges are equipped with the ball surfaces 22a and the bolster is provided with the ball contours 20, it will be understood that a reversal yjacent said bolster opening, a bolster received within said bolster opening, springs supporting said' bolster from said side frame, Wedges arranged-in pairs between the sides of said bolster and said columns, certain wedges of each pair and said bolster having universal joint connections and springs supporting said pairs of Wedges on said side frame.

2. In a car truck, a side frame having a lateral bolster opening therein and having columns adjacent said bolster opening, a bolster received within said bolster opening, springs supporting said bolster from said side frame, inner and outer wedges arranged in pairs between the sides of said bolster and said columns, the inner wedges of said pairs .having partially spherical surfaces thereon contacting the bolster and said bolster having partially spherical contours therein to receive the partially spherical surfaces of said inner wedges and springs supporting said pairs of wedges on said side frame.

3. In a car truck, a side frame having a lateral bolster opening therein and having columns ad jacent said bolster opening, a bolster having an end portion received within said bolster opening. bolster springs supporting said end of said bolster from said side frame, pairs of stabilizing members interposed between the sides of said bolster and said columns, one member o! each pairgbearing against a ,column and having a diagonal surface thereon for engaging the other member of the pair, the other member of the pair engaging the diagonal surface above specied and including a ball section received within a correspondingly shaped recess inv the side wall of said bolster and springs supporting said stabilizing members vfrom the side frame.

4. In a. car truck, side frames having bolster openings and columns adjacent the same, a bolster structure having ends disposed within said bolster openings, bolster springsv supporting the ends of said bolster structure from said side frames, pairs of oppositely disposed stabilizing .members interposed between the sides of said bolster structure and said columns, the ends of .said bolster structure bearing against one of each l pair of said members, l'springs interposed between the other member of each pair and portions of said side frames, said last mentioned springs urging said stabilizing members intowedging relation between said bolster structure and said columns as said bolster springs are increasingly compressed and means retaining said stabilizing members in assembled relationon the said bolster structure as the bolster structure is removed from said bolster openings in said side frames.

5. A bolster for stabilized trucks having an end portion adapted to be received within the bolster opening oi a side frame, the sides of said end portion having half spherical shaped ball contours therein to receive stabilizing members.

6. A bolster for stabilized trucks having an end portion adapted to be received within `a bolster opening in a side frame, the sides of said end portion having recesses therein within which stabilizing members may be received and the walls of said recessed portions having contours of partly spherical shape.

- 7. In a car truck, a side frame having a lateral bolster opening therein and having columns adjacent said bolster opening, a bolster received within said bolster opening, bolster springs supporting said bolster from said side frame, stabilizing wedges arranged in pairs between the sides of said bolster and said columns, certain wedges of each pair and said bolster having universal joint connections and stabilizing springs of materially less capacity than said bolster springs supporting said pairs o! wedges on said side frame.

8. In a car truck, a side frame having a lateral bolster opening therein and having columns adjacent said bolster opening, a bolster received Within said bolster opening, bolster springs supporting said bolster from said side frame, stabilizing wedges arranged in pairs between the sides of said bolster and said columns, certain wedges of each pair having integral rounded surfaces and said bolster having rounded contours receiving said rounded surfaces and stabilizing springs of materially less capacity than said bolster springs supporting said pairs of wedges on said side frames.

EDWIN W. WEBB.

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