US895148A - Center-bearing for car-bodies. - Google Patents

Description

uruouzox rum m! a, 1901.

the center of the runivay for the reception or UNITED STATES PATENT oFFion.

LARS J. BERG, OF CHICAGO, ILLINOIS, ASSIGXOR TO METALLIC SHEATHIXG CO. i IAXY,'.'A

CORPORATION OF ILLINOIS.

CENTER-BEARING r011 CAR-BODIES, Y

To all whom it may concern:

Be it known that I, Laas J. BERG, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Imirovements in Center Bearings for Carodies, of which the following is a specification.

The present invention relates more par ticularly to the center bearing which supports a car body upon the truck, althoughthe bearing might be used in other conn'ections for the support of a heav structure movable in a manner similar to that of a car body.

The object of the invention is to provide a roller bearing s-urface'which, atthe same time, permits of a suitable amount of play or side motion, which is advisable in the pivot ing of car bodies.

The invention relates more particularly. to the formation and mounting of the rollers in such manner as to dispense with the necessity for positive means of attachment for the rollers within t-hc'runway.

T he invention further relates to the formation, construction and arrangement of the runway, and means provided to prevent the ingress of dust and dirt.

The inxcntion consists in the features of construction and combination of parts hereinafter described and pointed out in the claims as new.

In the drawings Figure 1 is a top or plan view of the runway for the rollers; and Fig. 2 a half sectional elevation taken through the runway and gear hearing.

The runway, which is secured to the truck, comprises .a rectangular bed plate 3 provided with suitable bolt holes 4', for attachment of the bed plate to the truck; and the bed plate has integrally formed therewith a circular runway wall 5 which provides, the interior, a chamber 6 having a concave floor 7, which is depres ed toward the center and elevated toward the periphery. The chamberterminates at the center in a circular collar 8, leaving a hole or opening 9 through 4:

Ull

a king bolt 10 of the. usual character. Be-

' neath the convex floor 7 the bottom 11 of the bed plate is dished or hollowed to reduce the weight.

T he runway casting above described cooperates with a bearing 12, which is attached Specification of Letters Patent.

Application filed May 9. 1901. Serial No. 372,824.

to the car body,or to the bolster in the usual manner. The bearing comprises a flatbody portion 13, which has depending therefrom a rounded circular boss 14, the face of which has a curvature which, in cross section, is sub- 50 stantially equal to the curvature of the floor of the runway, but is curved in opposite relation thereto.- The boss, in its center, is provided with a recess 15, of ample size to receive the collar 8 and allow a certain amount of play or motion between the parts, which tends to reduce the vibration of the; car body when the trucks are in motion. The rear face 16 of the flat bodgf portion is dished, as shown, and in the center of the dished portion is a solid hub 17, through which the king bolt passes. The opening through the runway is of su'llicic'nt size to provide a clearance around the king belt,

which arrangement permits the side'inotion or play of the trucks above referred-to.

Between the equally curved-"surfaces ail'orded by the boss and the runway are interposed a plurality of elongated rollers- 18, which rollers are radially arranged and of concave formation, the concavity of the rollers being coincident with the convexity-I: of the surfaces against which the rollers bear, and the rollers being of minimunfi diameter at a point intermediate-" their-- length from end to end. The outerendsi' I!) of the rollers are enlarged. and fi-onical formation, and the rollers are held in place by means of an overhanging. beveled runway'wall 5. The overhanging bc'velcd i i- Patented Aug. 4, 1908.

portion of the ring, in combination with the inner face of the runway wall, provides 5 an obtuse angle or shoulder 21 extending,

all around the runway, whit-bangle or shoul- '95 dcr provides a bearing surface for the conic-al end of the rollers which are preferably;

beveled to contact thrbcaring wall atthisj' point only. The inner or contrm'tcd end,

22 of the roller is likewise of conical forgna;

tion, and the roller, as shown,is ofslightly less length than the width of the runway, which prevents any binding or cramping of. the rollers when in use. In order to prevent."

the ingress of dust or dirt the ovcrli'anging"105 ring 20 is provided with a leather washer 23 which bears against the under face of the body portion of the-bearing plate 13 which overlies the ring 20. The leather washer 23 is set in an annular groove 2-1 and is clamped s l l v a i in place by means of a rin 25. In like manner a washer 26' is provi ed around the bolt hole to prevent the ingress of dust an dirt-atthis point.

In use, the looseness of the connection between the .parts'will permit a certain amount of sliding motion or side play which is afiorded by reason of the curvature of the boss which rests upon 8.7.1ll61 surface of equal curvature so that the rollers, in addition to their ordinary' function of providing a ivotal bearin furthermore pro ride a sur ace upon whidh the rounded boss can slide-endwise or from side to side, which permits the trucks to have a considerable amount of vibration or side movement without jolting or jarring the car body. The

formation and mountinv for the rollers is onewhich holds the rollers at all times in proper. contact with the bearing surfaces andobviates a certain wedging action which is incident to the use of conical rollers and straight bearing-surfaces. In the use of the latter there is always a tendency .to squeeze or force out the rollers from the center, especially where a heavy weight is supported, but this tendency is obviated in the present case by reason of the fact that the mim- I 'brator inum diameter of the rollers is at a point intermediate the ends of the rollers, so that the weight of the car tends to maintain the rollers in normal position rather than forcethem out of normal position.- The overhanging ring provides a roper bearing pomt or angle for the conical outer ends of the rollers and reduces the friction to a single point, and at the same time obviates the necessity for journaling or. otherwise positivelysecuring the rollers in position- Furthermore the curved formation of the rollers and bearing surfaces holds the rollers, at all times, in radial alinement and prevents any displacement of the rollers out of their true position, by reason of the fact that the curved surfaces will not regi:- ter except when the rollers are maintained in roper position.

t willbe seen from the foregoing description that the arrangement is one which is highly advantageous in the supporting oi heavy structures like car bodies which are subjected to a considerable amount of Y1- motion in addition to a turning or pivota motion, and that the arrangement 1s one which combines great rigidity and strength with simplicity of construction and smoothness of operation.

interposed rollers each having a concave surface of less diameterintermediate its ends and adaptcd to register with the convex bearing surfaces, substantially described.

2. A center bearing, comprising-a runway having a convexly curved annular bearing surface of generall sloping formation in cross section from t 1e periphery toward the center,- a rounded boss having a convex surface, and interposed rollers each having a concave surface and adapted to register with the convex bearing surfaces, and being of minimum diameter intermediate its ends, substant ally as described.

3. A center bearing, comprising a runway portion having a surrounding annular wall or flange and an interior collar and having a. convexly curved runway floor curvedly rising from center to circumference, in combination with a roundedboss having a con vexity equal in cross section to the convexity of the floor, elon 'ated rollers having a concave bearing surface and being of enlarged diameter near the outer end, the end being of conical formation, and an overhanging beveled collar rigidly secured to the surrounding wall or flange, and forming, in combination therewith, an obtuse angle adapted to rcceive the top ends of the rollers, substantially as'described.

4. A center bearing, comprising a runway.

portion having a surrounding annular wall or flange and an interior collar and having a. convexly curved runway floor curvedly rising from center to circumference, in combi nation with a rounded boss having a convexity equal in cross section to the convexity of the floor, elongated rollers having a 0011- cave bearing surface and being of enlarged diameter near the outer end, the end being of. conical formation, anoverhanging beveled collar rigidly secured to the surrounding wall or flange, and forming, in combination there with, an obtuse angle adapted to receive the top ends of the rollers, and a king bolt entered through the boss and the collar and adapted to permit side motion or vibration, substantially as described.

. LABS J. BERG. 'itnesses:

SAMUEL lV. BAxNrxG, TALKER BANNING.

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