US1372721A - Roller-bearing - Google Patents

Description

J. F. OCUNNOR.

ROLLER BEARING.

APPLICATION HLED MAY 6.1920.

Patented Mar. 29, 19M.

,K CB,

narran f ortica.

JOHN F. OCONNOR, OF CHCAGO, ILLNOS, ASSGNORVTO WILLAIVI H. MINEFI, OF

CRAZY, NEW YGRK.

nonna-BEARING.

.Application led May 6,

To allez/'hom t may concern.'

Be it known that I, doi-IN F. OCoNNoR, a citizen` of the United States, residing at Chicago, in the county of Cook and State of Illinois, haveV invented a certain new and useful Improvement in Roller-Bearings, of which the following is a full, clear', concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification. v f

This invention. relates to improvements in roller bearings.

One object of the invention is to provide an anti-friction roller bearing especially adapted to railway cars wherein the friction is reducedsubstantially to a minimum and the parts made self-centering under the influence of gravity.

More specifically, the object of the invention is to provide an anti-friction bearing for railway cars adapted to be mounted on one bolster and whereinis presented a roller to the opposed bolster so arranged that said roller rotates about a relatively nxed axis while at the same time having a rolling bearing and also arranged as to avoid the usual disadvantages present in side bearings of theroller type having more or less delicate centering means or limited travel.

lnthe drawing*forininga part of this specification, Figure 1 is a vertical sectional view through the ends of body and truck bolsters of a railway car, the improved bearing being shown in elevation as applied to the truck bolster. Fig. 2 is a vertical sectional view taken substantially on the line 2-2 of F 1. F ig. 3 is a vertical sectional viewV of an anti-frictionbearing embodying my invention, the construction being somewhat different from that shown in Figs. 1 and 2. And Fig. l is a vertical sectional view taken VVsubstantially on the line 4 -4 of Fig. 3.

Referring to the construction illustrated in Figs. 1 and.2, 10 denotes the under side of a body bolster of a railway car' and'll the upper part of an opposed truck bolster.` rllhe improved bearing is shown applied to'the truck bolster and, as shown, comprises, broadly, a retaining or base casting a bearing roller B a pair of supporting rollers C ftl; and frames DMD.. f

lThe base orl retaining casting A is provided with suitable lugs v12--1 by which the casting may be riveted or otherwise secured Specification of Letters Patent. Patentigd MEM-n 29, 1921i,

1920. Serial No. 379,329.

to the bolster. .Cn its interior, the casting A is provided with a curved bearing surface 13 which is symmetrically arranged with respect to the vcenter of thel casting and, in g actual practice, the bearing .surface 13 will preferably be struck on a radius, the center of which coincides with the axis of the bearing roller B. rlhe bearing surface 13 ris formed on a web'of the casting A, said web being suitably braced by vertically extending ribsl-li formed integrally with the casting l The supporting rollers C`C are of like construction and are arranged tol roll back and forth on the surface 13, as will be evident from an inspection of Fig. 1. Each of the rollers C has a centrally extending opening through which is inserted a removable headed pin 15, said pin' 15 passing through corresponding perforations in the frames or plates D, as indicated in Fig. 2. rlhe pins 15 are held against accidental removal by cotters 16. With this construction, it is evident that the relation between the rollers C will always be maintained, their axes being held at a predetermined fixed distance apart. The bearing roller B is similarly attached to the frames llby a corresponding pin 17 and cotter 18, it being noted that the axes of the pins 15 and 17 coincide with the three corners of an isosceles'triangle andy preferably the corners of ane'quilateral 'triangle if all ofthe rollers C and B are of likesize.

The frames orpl'ates D, as clearly shown in Fig. 1 are of triangular forinationwith the lower edge curved as indicated at 19 on an are concentric with the axis of the pin 17. rlhe plates D are positioned within triangular openings 2Ov formed in the upwardly extending walls 21 of the base casting A, the site of the plates D being appreciably less than the size of the openings 20. The plates l) are limited in their travel when the edges 22 thereof engage the correspondingedges 23 of the side walls. The side walls may be slotted near the bottom of the base casting as indicated at 24C in order to facilitate clearing out of dirt or other foreign matter.

The operation of the device is as follows. llfhen the body bolster comes into engageinent with the roller B and the latter is rotated, it is evident that the rollers C will also be rotated and caused to travel in one direction up the curved bearing surface 13. During this movement, it will be noted that the llO bearing roller B does not travel bodily but j rotates about a relatively fixed axis and consequently any desired'travel of the body bolster bearing surface thereon may be obtained as is customary with thosev types of anti-friction bearings lwhere the anti-friction roller rotates on a .fixed axle. llt will alsobe noted that a rolling bearing or'journal is provided for the bearing roller B byV means of theV traveling rollers C.-C andV hence friction is reducedtoa minimum. since lno element `is required to rotate about any fixed journal or axle, the pins 15-and 17 acting merely as retainers and not as supports. ,Upon removal of the` actuating pressure, itis evident thatthe two rollers vC--C together ywith the frames l)l will automatically return to ltheir central normal position kunder the influence of gravity so that the device is self- .centering and without the aid of anyA springs or other relativel7 delicate devices.

Yln the construction illustrated in Figs. 8 and 4, the base vor retaining cast-ing A is of substantially the saine constructionr as that shown inthe lother figures except` that the side walls thereof are not slotted to accom- Vmodate` any triangular frames.l Saidcasting A is provided with ani arcuate bearing sur-V face 113 upon which are adapted toroll back .and forth the enlarged disk-like ends 25 of `and .which is supportedby the endsfof the spools C. A retaining pin 117 ispassed through the tube journal 28 and through cor;

responding alined openings in the side walls- 121 of the base casting, said pin being held by a cotter 118.

1n the construction shown in Figs. 3 and 7.4, and above described, the operation is substantially the same as that of the structure shown in Figs. 1 and 2. In the form of Figs. 3 and 4, however, due to thevreduced diameter ofthe journal 28, a proportionately less rotation ofthe spoolsfC will occur than will occur with the rollers C of the con* struction shownin Figs. 1 and 2. Stated in another manner, a rotation of the bearing roller B of the construction shown in Fig. 1, through an arcof 3600 will produce a substantially equal amount of rotation of the .rollers C whereas, in the construction in F igs3- andd, a rotation of the roller B through an arc of 360o will produce substantially only one-half the amount of rotation of the spools C. Hence, with the construction shown in Figs. 3 andv 4, a greater subj ected travel of the bearing is provided for within predetermined limits than with the construction sho-wn invv Figs. 1 and 2 where the bearing rollers are of the same size. The structure shown in Figs. 1 and2 possesses a certain advantage over that shown in Figs. 3 and e in that the roller B is supported throughout its entire length and `hence is only toV compression strains whereas the roller B', or at least the journal thereof isu subjected to, some bending-moments.

Although l have herein shown and described what I now consider the preferred .manner of carrying out the invention, I do notwish to be :limited thereto and what claim is:V Y v i. Y ff.. 1. 1n lan anti-friction bearing, the combi- Y nation with a retaining member having; a

curved bearing surface symmetrically disposed with respect to the center thereof; of a pair of traveling rollers supported on said surface; means for maintaining said rollers in a predetermined relation, saidpair of lrollers being automatically centered under the influence of gravity on said surface when the bearing vis not under an actuating pres- Y sure; and a bearing rolleradapted to engage .an opposed bearing surface, said bearing roller havingy rolling bearing contact with said traveling rollers.

2.5In an anti-friction bearing, the combi.- nation Awith a. retaining member having Ya curved bearing surface symmetrically disposed with respect to the center thereof; of a pair of traveling rollers supported on said surface; means for maintaining said rollers in a predetermined relation, saidfpair of j vrollers being automatically lcentered under the influence of gravity on said surface when the bearing is not under an actuating pressure; and a bearing'roller adapted to engage an opposed Vbearing surface, .said bearingl roller having rolling bearing tact with said traveling rollers, said curved bearing surface being struck on a radius having its center coinciding with the Vaxis of said bearing roller.

3. In an anti-friction bearing 4for railway cars,the combination with: a base casting adapted. tovbe secured to a truckb'olster; of abearingroller associated with said base casting and adapted to engage the bearing surface of an opposed bodybolster; and

traveling roller .bearings mounted on theV base casting, arranged to support said bearing roller.

4L. In a side bearing ofthe character dei scribed, the combination with a base casting provided with an upwardly facing concave vbearing surface symmetrically arranged COIl'- navegar der the influence of gravity; and a bearing roller extending partly above the base casting and adapted to coperate with an opposed bearing surface, said bearing roller having rolling bearing contact with the pair of first named rolling elements.

5. In a side bearing for railway cars, the combination with a base casting adapted to be secured to a truck bolster, said casting being provided with an upwardly facing concave bearing surface and spaced side walls, the latter having openings therein; of a pair of traveling rollers mounted on said surface; a bearing roller supported by said irst named pair of rollers; and frames at the ends of said rollers to which the latter are attached, said frames being disposed in the openings of the side walls and maintaining a fixed relation between the three rollers.

ln witness that I claim the foregoing l have hereunto subscribed my name this 26th day of Apr., 1920.

JGHN F. OCONNOR. Witness:

CARRIE GAIMNG.

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