US2237953A - Stabilized truck - Google Patents

Description

April! 8, 1941. E. w. WEBB STABILIZED TRUCK` Filed July 22, 1940 @5.1m www www w d M mw H w Weitehin STAT FFCE

assunse -s'renrmznn rauen ration of New Jersey AApplication .luly 22, 194W, Serial No. 346,879

(Cl. ldd-lut) 'Claims "'ihis invention relates to car trucks.

it is one oi the main objects of the present invention to provide novel and'improved stabilizine devices for car trucks, the side frames of which. are equipped with holster columns of ar cuate curvature in horizontal crosssection, the said stabilizing devices acting to break down and. prevent natural harmonic action of the bolster springs.

d iurther object is to provide novel and improved nieans for attaching wear plates to the bolster columns ci side frames.

The objects and advantages oi the invention will more :fully appear from the following clescription, made in connection with the accompanyinc drawing, wherein like reference characters reier to the saine or similar parts through.n out the various views and in which,

ldig. i is a'view in side elevation oi a portion oi a car truclr embodying the invention, certain ci the parts beine broken away and shown in section to incre fully illustrate the construction oi other parts;

d is a horizontal section taken on the line l-l oi lille. l as indicated by thev arrows;

Fie. d is a view looking toward the i'ace oi one oi the wear plates employed;

li'ie. il is a view in side elevation illustrating one oi the bolts used lor attachment oi the wear plates; and

bis?. b is a vertical section taken on the line b-ii ci liig. d, as indicated by the arrows.

ltciierrlnsr to the drawing, portions of a side iranie a ci a car truclr are illustrated.' The side trarne il. is equipped with a bolster opening t deilned by bolster' columns l-having wear plate receivina channels d therein. The inner races ill oi the column channels are of concave arcuate curvature in horizontal cross section, as best shown in big. d. Fitting within the channels d ci" the columns l are wear plates Id, these wear plates being of arcuate curvature in cross section and the convex 'laces of the wear plates beine disposed against the column faces 9 and 'the concave surfaces of the wear plates being disposed inwardly.

The wear plateshave bolt receiving openings li terein of peculiar construction. In forming the openings il parallelogram-shaped apertures are hrst punched in the plates I0, these apertures being of greater length than width..

lthe aperturesso punched are then countersunl; irorn the inner faces of the wear plates lli. the diameter oi the countersunk portions at the inner iaces of the plates equaling the' major axis oi the punched apertures, as best shown in Fig.. 3. To secure the wear plates I0 in place on the columns l, bolts i2 having heads of peculiar construction are employed. The heads of these bolts il form a pair of diametrically opposed lugs lia which are of such size as to fit within the apertures il oi the wear plates to prevent turning movement oi the bolts relative to the Wear plates. Between the two lugs l2a each bolt head is beveled at its edges to be snugly received within the countersunlr portion of an aperture Il. With this arrangement when the bolts I2 are applied in position, the outer surfaces of the heads lie flush with the inner surfaces oi the Wear plates iti and at the same time turning movement of the bolts is impossible. Oi course, the bolts I2 project through properly formed openings in the columns 'l and talee the usual washers I3 and nuts lli which cooperate with the bolts to hold the wear plates in place. 4With this constructionit becomes unnecessary to rivet the wear yplates in place on the columns and the wear plates can be very easily applied, removed and replaced.

Une end portion oi a truclr bolster B is received within the upper part of the bolster opening' li oi the side trarne, the lower part of the bolster opening being widened relative to the upper part thereoi to permit insertion of the bolster properly in place. The end portion oi the bolster h is supported by the usual bolster springs iii which rest on a lower spring cap IG carried by the widened portion oi the side :frame A at the bottom oi the bolster opening. These springs ib are spaced transversely of the truck somewhat farther than usual for a purpose presently to appear.

The side surfaces oi the end portion of the bolster lBopposite the wear plates id are equipped with pockets Il to receive wedges I8. 'I'he pockets il are of substantially triangular shape, as viewed in the vertical plane, taken transversely of the bolster with the hypothenuse of the triangle disposed inwardly. Accordingly, the bolster iorms inclined surfaces I9 opposite the wear plates tu.

The wedges i8 which may be referred to as stabilizing members or stabilizing wedges are also of substantially triangular shape in side elevation, as viewed in Fig. l, and these Wedges have arcuately curved convex outer faces 20 which worlr against the inner concave surfaces of the wear plates d. @i course, the surfaces 20 are of arcuate curvature in transverse cross section.

The inner surfaces of the stabilizing wedges Il have slight crowns 2l thereon for engagement with the inclined surfaces I9 of the bolster B. Crowns are given to these inner surfaces of the wedges so as to always permit of proper contact of the wedges with both the wear plates and the inclined surfaces I9 of the bolster irrespective of slight mal-adjustment of the parts or turning movement of the bolster relative to the side frame.

In order that the stabilizing wedges i8 may be tied to the bolster B for ease in assembly, shipment, etc., cross pins 22 extending across the pockets Il are provided, these cross pins being mounted in the opposite walls of the pockets. 'I'hese pins 22 extend through enlarged cross openings 23 in the wedges i8, the openings being preferably of triangular shape in side elevation as shown in Fig, 1. These openings 23 permit of limited movement of the bolster B upwardly and downwardly relative to the wedges i8.

Extending between the bottoms of the wedges I8 and the spring caps i6 are stabilizing springs 24 which support the stabilizing Wedges. from the side frames. The bottoms of the wedges it are preferably configured to form spring centers for the springs 24.

The side surfaces of the end portion of the bolster B are preferably equipped with vertical ribs 25 having slanting abutment surfaces cooperating with slanting surfaces 25 formed at `the inner and outer edges of the columns 'l to prevent anything more than but very limited lateral movement of the bolster relative to the side frames.

Of course, the structure illustrated will be duplicated at the other side of the truck. During travel of the truck equipped with the present invention, the natural harmonic action of the bolster springs l5 is prevented by reason of the use of the stabilizing wedges i8 and the stabilizing springs 24. At certain speeds of a car truck as the truck passes over rail joints, the actuation of the bolster springs is such that unless checked, the alternate compression and expansion of the springs is aggregative so as to produce severe bouncing action of the crr and the goods carried therein. The stabilizing wedges backed by the stabilizing springs 24 and engaging the inner surfaces of the wear plates i@ and the inclined surfaces I9 of the bolster produce a damping action on the bolster springs i5 to prevent cumulative harmonic action thereof. By reason of the curved surfaces 20 of the wedges the stabilizing devices of the invention accommodate themselves to car trucks having bolster columns of arcuate curvature in transverse cross section and, as a result, if during movement of the truck one end of the bolster B moves ahead of the other end thereof, proper bearing is still secured between the bolster and the bolster columns and at the same time the stabilizing function is secured.

It will, of course, be appreciated that the mechanical equivalent of the present construction could be secured if the inner surfaces s of the bolster columns were made of convex rather 'than concave curvature and the wear plates if! were oppositely curved and the surfaces 2li of the wedges were of concave curvature.

It will, of course, 'be understood that various changes may be made in the form, details, arrangement and proportions of the various parts without departing from the scope of the present invention, which, generally stated, consists in the matter shown and described and set forth in the appended claims. f l,

The present application is similar to United States application for patent, Serial No. 161,244, filed August 27, 1937, allowed August 3, 1938, and forfeited, filed in my name and entitled Stabilized truck.

What is claimed is:

1. In a car truck, a side frame having bolster columns of arcuate horizontal cross section defining a bolster opening, said columns being cylind- /cally disposed about a common vertical axis, a

bolster received between said bolster columns, and stabilizing wedges interposed between said bolster and said columns, said wedges having surfaces of arcuate shape in horizontal cross section cooperating with the arcuate surfaces of said columns, and said wedges having freedom for limited lateral motion relative to said columns, bolster springs supporting said bolster from said side frame and stabilizing springs supporting said stabilizing wedges from said side frame.

2. In a car truck, a side frame having bolster columns of arcuate horizontal cross section defining a bolster opening, said columns being cylindrically disposed about a common vertical axis, a bolster received between said bolster columns, said bolster having diagonally inclined'surfaces opposite said columns, stabilizing wedges interposed between the diagonally inclined surfaces of said bolster and said columns, said wedges having inclined surfaces cooperating with the inclined surfaces of said bolster and having other surfaces of arcuate shape in horizontal cross section cooperating with the arcuate surfaces of said columns, and said wedges having freedom for limited lateral motion relative to said columns, bolster springs supporting said. bolster from said side frame and stabilizing springs supporting said wedges from said side frame.

3. In a car truck, a side frame having bolster columns of arcuate horizontal cross section dening a bolster opening, said columns being cylin drically disposed about a common vertical axis, a bolster received between said bolster columns, said bolster having diagonally inclined surfaces opposite said columns, stabilizing wedges interposed between the diagonally inclined surfaces of said bolster and said columns, said wedges having inclined surfaces cooperating with the inclined surfaces of said bolster and having other surfaces of arcuate shape in horizontal cross section cooperating with the arcuate surfaces of said columns, and said wedges having freedom for limited lateral motion relative to said columns, bolster springs supporting said bolster from said side frames, stabilizing springs supporting said wedges from said side frame, said bolster having wedge retaining walls inwardly and outwardly of said wedges longitudinally of the bolster, cross pins carried by said bolster and extending between said inner and outer walls thereof, said wedges having enlarged openings extending transversely therethrough and through which said pins extend, the said openings permitting upward and downward movement of said wedges relative to the bolster.

4. In a car truck, a side frame having a bolster opening therein and columns defining the bolster opening and of arcuate curvature in horizontal cross section, said' columns being cylindrically disposed about a common vertical axis, a bolster working within said opening and having pockets of triangular shape in vertical transverse cross section in its sides opposite said columns, stabilizing members of wedge shape received within said pockets and having end surfaces of arcuate horizontal cross section cooperating with the arcuat ,I

assente 3 surfaces of said columns, said wedges leaving ireedom for limited lateral motion relative to said columns, bolster springs supporting said bolster from said side :frame and stabilizing springs supporting said stabilizing members from said side frame.

ii. in a car truck, a slide frame having bolster columns defining a bolster opening, a bolster received between said bolster columns, said bolster liar/ing diagonally inclined surfaces opposite said columns, stabilizing wedges interposed between the diagonally inclined surfaces of said bolster and. said columns, said wedges having inclined surfaces cooperating with the inclined surfaces bolster and extending between said inner and outer Walls thereol, said wedges having enlarged l0 openings extending transversely therethrough and through which said pins extend, the said openings permittine upward and downward movement of said wedges relative to the bolster.

EDWIN W. WEBB.

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