US1405681A - Antifriction bearing - Google Patents

Description

UNITED STATES PATENT OFFICE.

WILLIAM A. GEIGER, OF CHICAGO, ILLINOIS, ASSIGNOR T0 WILLIAM'H. MINER, 0F CHAZY, NEW YORK.

ANTIFRICTION BEARING.

Application filed May 7, 1921.

To all whom it may concern:

Be it known that I, \VILLIAM A. Gnronn, a citizen of the United States, residing at Chicago, in the county of Cookand State of Illinois, have invented a certain new and useful Improvement in Antifriction Bearings, of which the following is a full, clear, concise, and exact description, reference be ing had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in anti-friction bearings.

The object of the invention is to provide a self-centering antifriction bearing especially adapted for use as aside bearing on railway cars, the bearing being so formed that it is preferably attached to the under side of a body bolster or like member.

In the drawing forming a part of this specification, Figure 1 is a vertical, sectional view taken lengthwise of a car through the body and truck bolsters. thereof and illustrating my improvements in connection therewith. Figure 2 is a vertical, sectional view taken lengthwise of. the bolsters and corresponding substantially to the line 2-2 of Figure 1. Figure 3 is a top plan view of the bearing illustrated in Figure 1, parts being broken away in order to accommodate the figureon the sheet. And Figure 4 is a detail, sectional view illustrating an alter nate method of securing the wear plate and filler block rigidly together,,as hereinafter described. 1

Referring first to the construction illustrated in Figures 1 to 3 inclusive, 1O denotes the upper bearing surface of a truck bolster and 11 the under side of an opposed body bolster. The improved bearing is adapted to be attached to the body bolster and, as shown, said bear comprises, broadly, a retaining member or housing A; an anti-friction element roper B; a wear plate C and a filler block The retaining member A, as shown, is

re'ferably in the form of a malleable casting having an upper flat surface and laterally extended erforated flanges 12 by which it is adapted? to be secured to the body bolster as by rivets 13. Said member A is provided also with downwardly extending vertical side flanges 14-14, horizontal walls l515 and vertical end flanges 16-l6. The side walls 14, on their inner faces, are provided with grooves, each groove-having a vertical Specification of Letters Patent.

Patented Feb. 7, 1922.

Serial No. 467,522.

entrance 1'7 merging into a horizontally extending portion 18, for the purpose hereinafter described. It will be noted that the entrance 17 of each groove is offset from the center as clearly shown in Figure 1.

The anti-friction element B is in the form of a rocker of the gravity type having an upper cylindrical bearing surface 19 and a lower cylindrical bearing surface 20, said surfaces being concentric but the upper surface being struck on a shorter radius than the lower surface. Flat sides 21-21 are formed on the rocker, the same being ar ranged substantially tangential to the bearing surface 19. Said flat surfaces 21 are adapted to engage with. the under faces of the horizontal walls 15 of the member A to limit the rolling movements of the rocker B, as shown by the dotted position B of the rocker in Figure 1. At its ends, the rocker B is provided with laterally extended cylindrical studs 22 22 in axial alinement with the common center or axis of the two bearing surfaces 19 and 20, Said lugs 22, which function as journals for the rocker B during the return of the latter to normal position after each actuation, extend within said grooves and are entered therein first vertically through the entrance portion 17 of the grooves and then slipped over horizontally to a position in the center of the member A; y a

In the top portion thereof, the member A is cut out with a substantially rectangular openingas indicated at 23. Below the opening 28, the member A is provided with a widened recess as indicated at 24, said recess 24 being open at its ends as indicated at 24 24 in Figure 2. The wear plate C, which may be of any suitable hardened material, is of generally rectangular form and is adapted to be slipped into position through the openings 24 in a direction transverse of the member A; The plate C is centrally perforated with two openings, as shown, at 2525 which come inthe center of the member A when the plate C is in proper position. v

The insert or filler blockv D, preferably in the form of a malleable casting, occupies the rectangular opening 23 and is formed with a pair of depending cylindrical lugs 2727, each having a rounded lower end as indicated at 28, said lugs 27 extending through the openings 25 in the plate C and having the rounded ends 28 thereof depend ing below said plate C. Said depending ends 28 operate in the nature of teeth in co-operation with corresponding recesses 29-29 provided in the bearing surface 19 of the rocker B. With this construction, itis evident that the rocker B can never ass wholly out of engagement from both ugs 27 at the same time and consequently the rocker B is prevented from bodily shifting with respect to the retaining member A and positive means are provided for maintaining the element B in central position when free from pressure.

The plate C and insert block D are held rigidly together by any suitable means such as the rivets 3Q30 which are countersunk at both ends to lie flush with the corresponding outer surfaces of the block D and plate C. V

In assembling the hearing as shown, the rocker B is introduced within the member A as hereinbefore described. The plate C is then'inserted transversely of the member A and then the block D is applied vertically through the top of the member A. It is obvious that the plate G cannot shiftin any direction in a horizontal plane after the block D is engaged therewith. By rigidly uniting the block D and plates C as by the rivets 30, it then becomes impossible for the block D to be withdrawn vertically or the plate C to fall downwardly and the plate C is prevented from 'upwa'rd movement by the overhangingshoulders 31--31 in the, member A. After the introduction of'the block D with its projecting'lugs 27 in engagement with the rocker B, the latter cannot be disassembled from'the retaining member A for the reason that the rocker B must always be in engagement with 'at'least one of the lugs 27 and hence the studs 22 can never thereafter reach a position in ver tical alinement with the entrance opening 17 of the guide gr'ooves c e V In'a'ctual p'ractice', the diameters of the lugs 22 will be made slightly less' than the vertical height of the horizontally extending portions 18 'of the grooves in the member A and a slight clearance normally left between'the upper bearing surface 19 and the under face ofthe bearing plate C. In operation, when pressure is applied to the rocker element B, it will have its upper surface engaged with the bearing plate C and the rocker will roll to either side of normal positionas for instance to the position B shown in Figure '1. During this rolling movement of the rockerB, it is evident that the studs 22 will travel in a straight line so long as the rolling action remains on the cylindrical surface 19. Upon removal of the pressurefrom the rocker B, the latter is adapted to-fall slightly so that'the load is sustained by the studs 22 and, as the rocker swings under the influence of gravity around said studs 22 as centers, the rocker will beautomatically returned to its normal central position by reason of the interengagement of the lugs 27 and rocker B.

ith the arrangement shown, the hearing may bemanufactured at comparatively small expense and, when once properly assembled, may be shipped without danger of loss of parts or tampering therewith except the parts are mutilated or destroyed. The rocker is self-centering under the influence of gravity and without the aid of any springs and may be designed to provide any necessary travel within the limits required in railroad practice. By making the block D of a thickness such as to fullyvoccupy the space between the top face of the plate- C and the under face of the body bolster 11, the plate C is relieved of bending stresses and is subject only to compression stresses as is also the block D. 7

Referring to the construction illustrated in Figure 1, I have shown a different method of securing the filler block D with .1

the wear or bearing plate 0. This method consists 111 providing a vertlcal opening 130 y in the block D and an inclined'opening 131 in the plate C and then driving a friction pin 32 within said openings, the pin 32being initially straight so that, asit is driven home, it is distorted in passing into the opening 131 and will remain in place so as to prevent either vertical separationof the members C and D or lateral shifting of one with respect to the other.- It will also be appreciated by those skilled in the art that the two openings 130 and'131'may be made both straight and an initially deformed pin driven into them with the samecresult; 7

. I have herein shown and described what I now consider the preferred mannerof carrying out the invention, but the-sameis merely illustrative and I contemplate all I changes-and modifications that come within thefscopeof the claims appendedhereto I claim:

1. In an antifrietion bearingbf the 'character described, the combination'with a re taining member adapted to be secured to the under side of a body bolster or the like; of an anti friction gravity selfcentering rocker element havingsupporting-studs pro 'ecting from the ends thereof, the said memer having grooves within which said studs extend and provide supporting ledges for the studs; of a separate bearing plate-inserted within said member above the rocker and onwhich the rocker is adapted to -roll;;

a filler block within said memberabove said plate, said fillerblock having lugs project ing. through said plate and cooperatingiwith corresponding recesses in said rocker to maintain the proper relation of the rocker with respect to said member; and means for said rocker having a recess cooperab rigidly securing said block and plate to gether.

2. In an anti-friction bearing of the character described, the combination with a retaining member adapted to be secured to the under side of a body bolster or the like, said retaining member having an opening in the top thereof and transversely extending openings, said member having also depending side walls formed on the inner sides thereof with supporting horizontally extending ledges; of a rocker havin supportin studs extending from the en s thereof, said studs being supported on said ledges; a bearing plate insertible through said transversely extendin openings above said rocker and forming 516 upper bearing for the latter, said plate having a vertical opening therethrough, a filler block insertible vertically through said opening in the top of said member to substantially occupy said opening, said block having a lug depending from the bottom thereof and extending through said opening in the bearin plate,

%e with said depending lug; and means for rigidly securing said filler block and bearing plate together.

3. In an anti-friction bearing of the character described, the combination with a retaining member adapted to be secured to the under side of a body bolster or the like, said retaining member having an opening in the top thereof and depending side walls, each of said side walls being provided on the inner side thereof with a groove having a vertical entrance offset from the center of the retaining member and a horizontally extending section, the latter providing horizontally extending supporting ledges; of a gravity self-centering rocker having upper and lower concentric surfaces struck on different radii, the upper surface corresponding to the shorter radius, said rocker having supporting studs extended from the ends thereof in axial alinement with the common center of said bearing surfaces, said lugs projecting within said grooves and insertible in the latter through the entrance openings thereof, said lugs supporting the rocker from said horizontal ledges when the rocker is in operative position; a bearing plate insertible transversely of said member above the rocker and with which the upper surface thereof is adapted to engage, said plate being provided with vertica ly extending openings; a filler block insertible vertically within the opening in the top of said retaining member, said block having depending centering lugs extending through said openings in the bearing plate and below the latter, said rocker having recesses cooperating with said lugs; and means for rigidly uniting said filler block and the bearing plate.

In witness that I claim the foregoing I have hereunto subscribed my name this 5th day of May, 1921.

WILLIAM A. GEIGER.

Witnesses:

CARRIE GAILING, ANN BAKER.

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