US2200571A - Railway truck - Google Patents

Description

y 14, 19400 o s. BARROWS 2,200,571

RAILWAY TRUCK Filed Nov. 10, 1937 2 Sheets-Sheet l y 1940- D. s. BARROWS ,200,571

RAILWAY TRUCK Filed Nov. 10, 1937 2 Sheets-Sheet 2 relation to the guide column surfaces.

Patented May 14, 1940 PATENT OFFICE RAILWAY TRUCK Donald S. Barrows, Rochester, N. Y., assignor to The Symington-Gould Corporation, Rochester, N. Y., a corporation of New York Application November 10, 1937, Serial No. 173,941.

23 Claims.

The present'invention relates to railway vehicle trucks with specific reference to the spring plankless type of truck in which the bolster portion thereof functions as the sole intermediate structural connection between spaced side frame members.

The spring plank of an ordinary truck structure was primarily designed to maintain the side frame members in proper spaced relation laterally of the truck and also served to prevent one side frame from leading the other frame member, while in a spring plankless truck these functions are performed by the bolster member.

The problem also arises, in the type of railway vehicle truck under consideration, of permitting a certain amount of angling or horizontal rotative movement to the bolster member with respect to the side frame members in order to impart a desired degree of flexibility in the truck.

The structure,'wherein the bolster is the sole intermediate structural connecting means and also of desired flexibility, necessitates the provision of adequate bearing areas between the bolster member and side frame members, said bear- I ing areas presenting surface contacts in contradistinction to'line contacts. 'It is, therefore, an object of the present invention to provide a bolster and associated side frame members so constructed and arranged as to permit a limited transverse and rotative angling movement of the bolster with respect to the side frame and with adequate bearing areas therebetween.

In order to minimize the wear between the side surfaces of the guide cOlumns, which comprise an integral portion of the frame members,

and the juxtapos'itionedsurfaces on the bolster end portion positioned therebetween, it becomes another object of the present invention to provide additional surfaces on the frame member and bolster inwardly of the truck and in spaced By the addition of these latter-named surfaces an appreciable resisting lever arm will also be provided to materially assist the guide columns in limiting the rotative or angling movement of the bolster, thereby eifectively maintaining the truck structure in proper alignment.

A still further object of the instant invention V is the provision, in a side frame, of bolster guide guide columns having a surface thereon spaced.

from and coradial with the guide column flange surfaces.

Another object of the invention is the provision, in a railway truck, of a side frame having guide columns with extensions provided on the inner flanges thereof and arranged to form a resisting lever arm adapted to serve as a brake hanger bracket and a bearing means for an associated bolster at a location inwardly of the frame proper in order to assist the guide columns in limiting the rotative movement of the bolster; the side frame and bolster being constructed inwardly of the truck in such a manner that they may be used interchangeably with bolsters and side frames other than the particular types of the instant invention.

Other objects and advantages will become apparent upon reference to the accompanying drawings which form a part of the present description and disclose a structure, exemplary in form, embodying a type of the instant invention.

Considering the drawings generally, Figure 1 is a fragmentary front elevational view of a railway vehicle truck embodying the present invention; a portion of the view is shown in vertical cross section.

Figure 2 is a plan view taken along the lines 2-2 of Figure 1 and looking in the direction of the arrows; a portion of which is a top view and another portion of which is a horizontal sectional view.

Figure 3 is a transverse sectional view of the sideframe member disclosed in Figure I, removed from the associated truck structure, and is taken along the lines 33 of Figure 1 looking in the direction, of the arrows.

Figure 4 is a side elevational view of the bolster member shown in Figures 1 and 2 and removed from the associated truck structure.

Referring to the drawings in detail, wherein like reference characters are used to indicate like parts, the railway truck, designated generally by the numeral 1, comprises a pair of transversely spaced side frames 2. While it will be understood that two such side frames are employed ina railway truck, only one is fragmentarily illustrated in the disclosed arrangement. Each side frame comprises a top or compression member 3 and a bottom or tension member 4 both of which are integrally connected adjacent their intermediate portions by vertically disposed spaced guide columns 5 to form a Window or bolster receiving opening 5 therebetween.

The compression member outwardly of the guide columns comprises downwardly sloping portions 8, the ends of which merge into or are integrally formed with journal boxes or journal box receiving jaws, neither of which are illustrated. The tension members 4 outwardly of the guide columns are directed upwardly, as at l, to also merge with the above-recited journal boxes or journal box receiving jaws. The tension member portion 8 intermediate the guide columns is normally horizontally disposed and provided, adjacent the upper edge thereof, with lateral or transverse extensions 9. The transverse extensions which project on either side of the tension member, together with the said tension member, form a spring group engaging or supporting portion of suitable or adequate area. The extensions 3 are preferably reinforced by spaced triangular gussets it! formed integrally with the extensions and the tension member portion therebelow, thereby overcoming any hinging action of the extensions about the tension member as the result of a superimposed vertically acting load.

Extending between the side frame members and forming the sole intermediate structural frame connecting means is a vertically movable bolster ll, an end portion l2 of which occupies the upper portion of the window opening 5 and is movably associated with the guide columns. A nest of springs or spring group I3, indicated diagrammatically and composed of any desirable arrangement or types of springs, is interposed between the tension member and bolster end. The spring group is positioned within the bolster opening 5 adjacent the lower portion thereof and functions as a resilient support for the bolster.

The guide columns 5, extending in a substantially vertical direction between the compression and tension members, comprise a transverse web I4 the side portions of which terminate in longitudinally disposed inner and outer flanges l5 directed away from the window opening and toward the corresponding end portions of the side frame.

In the majority of truck constructions now in use each guide column of the side frame is provided with a web surface which is perpendicular to the longitudinal axis of the frame and flange surfaces forming continuations of the web surface which are parallel to the above-mentioned longitudinal axis. The bolster member is consequently arranged with correspondingly formed column engaging surfaces. It is particularly true in the case of certain spring plankless type trucks that any movement of the bolster away from a degree or perpendicular relation with the associated side frames will cause line contacts between the bolster and side frames. By reason of the fact that the bolster moves vertically, due to the resilient mounting thereof and external impacts to which the entire structure is subjected, it will be readily appreciated that the line contacts will wear progressively and rapidly. As this wear takes place the bolster will be free to rotate horizontally or move angularly about the side frames beyond a permissive or required degree and thus permit one side frame of a truck to lead the other, thereby presenting a structure out of alignment.

In order to overcome the above-recited and undesirable line contact conditions there is provided, on the guide column web M, a cylindrically concave surface [6 the vertical axis of which corresponds to the intersection of the planes of the longitudinal and transverse axes of the side frame, which will be hereinafter referred to as the vertical axis of the side frame. Thus, the concave surfaces on the guide columns have a common axis or, as it may be otherwise termed, the concave surfaces are coaxial with respect to one another. The concave surface IS on each guide column merges into surfaces I! provided on the column flanges l5 which diverge outwardly of the guide columns. The planes of the surfaces I! are angularly disposed to the longitudinal axis of the side frame and are coradial with respect to one another. By this arrangement, therefore, the web surfaces have a common axis corresponding to the vertical axis of the side frame, and the flange surfaces are coradial with the vertical axis of the side frame.

The end portion I 2 of the bolster l I, interposed between the guide columns, has oppositely disposed side walls l8 thereof formed with a bulged or cylindrically convex vertically disposed surface 19 coaxial with respect to one another and the vertical axis of the side frame. The convex bolster surfaces are preferably spaced from the concave column surfaces an amount sufficient to allow for a free vertical movement of the bolster with respect to the side frame. This permissive clearance also results in a limited longitudinal movement of the bolster with respect to each side frame. By thus arranging the coaxial convex and concave surfaces on the bolster end and guide columns respectively, it will be readily appreciated that the bolster will be free to pivot about or angle horizontally with respect to the side frame. In addition to affording a relative rotative movement to. the bolster the concave and convex surfaces will also provide an increased bearing, wear or guide surface between the side frame and bolster.

Projecting outwardly of the bolster side walls are vertically disposed inner and outer guide lugs 20 and 20 respectively which are adapted to engage the inner and outer flanges of the guide column, and are primarily intended to retain the bolster end within the window opening. Longitudinally disposed ribs 2! are formed integrally with the inner and outer guide lugs and the side walls adjacent the lower edge of the bolster end, thereby adding rigidity to the bolster end construction as well as providing a suitable or adequate bearing area for the underlying springs l3. The guide lugs are provided with inwardly facing surfaces 22 which form continuations of or define the convex side wall surfaces and are coradial therewith, that is, the planes of the surfaces 22 intersect each other at the axis of the convex surface. The surfaces 22, which are in spaced relation to the guide column surfaces in order to permit the bolster to angle horizontally with respect to the side frames and thereby incorporate in the truck structure the desired degree of flexibility, are adapted to engage the column flange surfaces I l. The lug surfaces 22 engaging the column surfaces l'l form a limiting or stop means in order to restrict the pivotal or horizontal angling movement of the bolster beyond a predetermined degree with an appreciable amount of bearing area therebetween.

However, in spring plankless trucks, wherein the column flange surfaces form a limiting means in order to prevent the lateral as well as horizontal angling movement of the bolster, the bearing areas therebetween have been found at times to be insufficient, that is, the contacting surfaces are subjected to such wear that the lives of the bolster and side frame members are curtailed materially. It is, therefore, with this thought in mind that additional coacting surfaces have been provided between the bolster and side frame. To accomplish the addition of coacting limiting surfaces or bearing pads, an extension23 projecting inwardly of the truck from the inner flange l5 of each of the guide columns has been provided. The extension comprises a vertically disposed web 24 extending substantially transversely of the truck structure and the inner end portion 25 of which is angularly disposed in a direction toward the bolster. A flange 28 is provided at the free extremity of the end portion 25, said flange having an outer surface 2'! thereof lying in a plane which is radially disposed with respect to the vertical center of the side frame. The surface 21 is, therefore, co-

radial with the surfaces I! on the inner and outer column flanges and is positioned inwardly of the truck in spaced relation to the guide column surfaces.

The bolster side walls are convoluted or embossed outwardly from the normal plane thereof, as at 28, at a position intermediate the ends of the bolster. Each of the convoluted portions 2!} are provided with an outer surface 29 positioned oppositely the adjacent extension flange surface 21. The plane of each surface 29 intersects the vertical axis of the side frame. This, therefore, disposes the surfaces 29 in a coradial relation with the guide lug surfaces 22. The distance or clearance between the embossed portion surface 29 and the adjacent extension flange surface 21 is, of course, somewhat greater than the distance or clearance between the column flange surfaces i1 and guide lug surfaces 22. By this arrangement the bolster surfaces 22 and 29 will contact or engage the side frame surfaces I! and 2! simultaneously upon relative rotative movement of the bolster.

The extension is preferably so constructed that the actual leverage arm formed thereby merely extends for the lateral distance of the web portion 24, and in order to rigidify the extension and resist or overcome the hinging action of the extension about the base thereof or the inner guide column flange, vertically spaced top and bottom integrally formed ribs 3i! and 3| extend respectively from the compression member and outer column flange to the free extremity of the extension flange 26.

A brake hanger or brake link support has been incorporated in the extension structure by the provision of an intermediate rib 32 extending outwardly from the vertical web- 24 and spaced below the top rib 30. The intermediate rib 32 is preferably disposed in an upward direction to correspond with that portion of the top rib immediately thereabove. The intermediate and top ribs form an outwardly opening jaw for the reception of a brake hanger or support (not shown). Aligned apertures 33 are provided in the top and intermediate ribs for the reception of a suitable pin or brake hanger retaining means.

7 From the foregoing it will beseen that an adequate bearing area has been provided between the bolster and side frame to limit the rotative or horizontal angling movement of the bolster and therebyeifectively retain the entire structure in proper alignment. It will also be observed that by embossing or convoluting the side walls of the bolster outwardly from the normal plane thereof and so constructing the extensions 23,

"a side frame without the particular disclosed design of extension may be used in combination with the instant bolster, and the converse of this is also'possible.

I claim:

1. In a railway truck, in combination, a side frame having a bolster opening defined by guide columns, said guide columns having inner cylindrical surfaces concave about the vertical axis of said frame, a bolster with an end portion positioned in said opening and formed with ,outer cylindrically convex surfaces cooperating with said concave surfaces to allow for horizontal angling of said bolster with respect to said frame, brackets extending inwardly of said truck from said frame, and angularly disposed surfaces on said brackets spaced from said guide columns adapted to engage correspondingly disposed surfaces on said bolster for limiting said horizontal angling of said bolster, said bracket surfaces being substantially coradial with respect to said vertical axis.

2. In a railway truck, in combination, a side frame having a bolster opening defined by guide columns, said columns each having side flanges provided with outwardly facing surfaces coradial with the vertical axis of said frame, a bolster with an end portion received in said opening and formed with inwardly facing surfaces spaced 'from and coradial with said frame surfaces to allow for horizontal angling of said bolster with respect to the side frame, brackets extending inwardly of said truck from. said frame having surfaces spaced from the column surfaces, said bracket surfaces being substantially coradial with respect to said vertical axis of the frame, and surfaces on said bolster adapted to engage said bracket surfaces.

3. In a railway truck, in combination, a side frame having a bolster opening defined by guide columns, each guide column having a transverse web and side flanges, said transverse webs having surfaces thereof concavely curved and coaxial with respect tothe vertical axis of the side frame, said flanges having surfaces coradial with respect to the said side frame vertical axis, a bolster adapted to angle horizontally with respect to said side frame having an end portion positioned in said opening, said bolster end comp-rising convexly curved surfaces defined by end surfaces adapted to engage said web and flange surfaces respectively of said columns, brake hanger brackets extending inwardly of said truck from said columns, and an angularly disposed flange on said bracket coradial'with said column flange surfaces and forming a bearing pad adapted to engage a correspondingly formed pad on said.

bolster.

frame having a bolster opening defined by guide columns, each ,of said guide columns having a transverse web and an inner side flange, concavely curved surfaces on said transverse webs coaxial with respect to the vertical axis of the side frame, surfaces on said inner flanges coradial with said side frame vertical axis, a bolster adapted to angle horizontally with respect to the side frame having an end portion received in said opening and comprising surfaces positioned adjacent and coaxial with said concave surfaces, outwardly extending lugs provided on said bolster having surfaces coradial with and adapted to engage said side flange surfaces, brake hanger brackets extending inwardly of said truck from said columns, and an angularly disposed end flange on each of said brackets being coradial with said inner flange surfaces and adapted to engage a correspondingly disposed portion of said bolster.

5. In a railway truck, in combination, a side frame having a bolster opening defined by guide columns, said guide columns having inner cylindrical surfaces concave about the vertical axis of said frame, a bolster with an end portion received in said opening and formed with outer cylindrically convex surfaces cooperating with said concave surfaces to allow for horizontal angling of said bolster, brake hanger brackets ex tending inwardly of said truck from said guide columns, and angularly disposed surfaces on said brackets coradial with said side frame vertical axis and adapted to engage correspondingly disposed surfaces on said bolster for limiting said horizontal movement of said bolster.

6. In a railway truck, in combination, a side frame having a bolster opening defined by guide columns, said columns having side flanges pro vided with outwardly facing surfaces coradial with the vertical axis of said frame, a bolster with an end portion received in said opening and formed with inwardly facing surfaces spaced from and coradial with said side frame surfaces to allow for horizontal angling of said bolster with respect to the side frame, and extensions on said columns projecting inwardly of said truck from said guide columns and having surfaces spaced from and coradial with said column surfaces adapted to engage complementary surfaces on said bolster.

7. A side frame having a bolster opening defined by guide columns, said guide columns having transverse webs formed with cylindrically curved surfaces coaxial with respect to each other and the vertical axis of said side frame to allow for horizontal angling of an associated bolster, an inner flange on each of said columns having an angularly disposed surface coradial with said side frame vertical axis, and extensions projecting from said column flanges having surfaces thereof in spaced relation and coradial with said inner flange surfaces adapted to engage bolster surfaces for limiting the horizontal movement of said bolster.

8. A truck bolster arranged for horizontal angling with respect to an associated side frame and having end portions each of which comprises cylindrically convex surfaces coaxial with respect to one another and the vertical axis of said side frame, inwardly facing surfaces defining said convex surfaces and coradial with said side frame vertical axis, and bearing pads positioned intermediate the ends of said bolster having surfaces thereof coradial with said inwardly facing surfaces.

9. A truck bolster arranged for horizontal angling with respect to an associated side frame and having spaced side walls adjacent the end portions thereof, each side wall having a cylindrically convex surface, inner and outer guide lugs extending outwardly of the side walls provided with surfaces defining said cylindrical surfaces and coradial with respect to one another, and bearing pads extending from said side walls in lateral spaced relation to said guide lugs; said pads having surfaces coradial with said guide lug surfaces.

10. In a railway truck, a side frame having spaced guide columns defining a bolster opening, each of said guide columns having an inner cylindrical concave surface coaxial with the versaid webs having the surfaces thereof coradial with said side frame vertical axis, convoluted portions on said bolster provided with a surface coradial with said flange surfaces, said convoluted portion surfaces being adapted to engage said extension flange surfaces to limit the rotative movement of the bolster.

11. In a railway truck, in combination, a side frame having a bolster opening defined by guide columns, each of said columns having side flangesprovided with outwardly facing surfaces coradial .1

with the vertical axis of said frame, a bolster with an end portion received in said opening and formed with inwardly facing surfaces spaced from and coradial with said column flange surfaces to allow for horizontal angling of said bolster :11

with respect to the side frame, extensions on said columns projecting inwardly of the truck and having surfaces thereon spaced from and coradial with said column surfaces, said bolster having surfaces spaced from the inwardly facing surfaces and coradial with said extension surfaces, and spaced ribs extending longitudinally of the truck from said extensions to form therewith outwardly opening jaws for the reception of a brake support.

12. A side frame comprising longitudinally spaced extensions projecting from one side thereof, said extensions terminating in flanges having surfaces coradial with respect to one another and the vertical axis of said side frame.

13. A side frame comprising longitudinally spaced extensions projecting from one side thereof, each of said extensions having a web substantially parallel with a transverse vertical plane of the side frame and a flange angularly disposed to said web, said flange of each extension hav ing a surface thereof substantially coradial with respect to the line of intersection of vertical planes passing through the longitudinal and transverse axes of said side frame.

14. A side frame comprising spaced extensions projecting from one side thereof, each extension comprising a web and an end portion angularly disposed to said web, each end portion terminating in an angularly disposed flange, and surfaces A on said flanges angularly disposed to a longitudinal vertical plane of said side frame and coradial with respect to one another.

15. A side frame comprising longitudinally spaced extensions projecting from one side thereof, each of said extensions having a surface spaced from said side frame and substantially coradial with respect to the line of intersection of vertical planes passing through the longitudinal and transverse axes of said side frame.

16. A side frame having a bolster opening defined by guide columns, each of said columns having side flanges provided with outwardly facing surfaces substantially coradial with the vertical axis of said frame, extensions on said columns projecting from one side of said frame, a surface on each of said extensions substantially coradial with said outwardly facing surfaces, and vertically spaced ribs directed longitudinally of said frame from each extension to form jaws for the reception of a brake support.

1'7. A side frame having longitudinally spaced extensions projecting from one side thereof, each of said extensions comprising a web terminating in an angularly disposed portion, a flange angularly disposed to and forming a continuation of each of said angularly disposed portions, each of said flanges having surfaces thereof which are angularly disposed to a longitudinal vertical plane of said side frame, and vertically spaced ribs integral with each of said webs to form a support for brake rigging.

18. A load-carrying member having an end portion including spaced side walls, longitudipnally spaced guide column engaging surfaces on said side walls being substantially coradial with respect to one another, and additional surfaces on each of said side walls in spaced relation to said first-mentioned surfaces, said additional surfaces being substantially coradial with said firstmentioned surfaces.

19. A load-carrying member having an end portion adapted to engage guide columns of an associated side frame, said member having surfaces positioned intermediate said guide column engaging portion and a central portion thereof, said surfaces being substantially coradial with a vertical axis formed by the line of intersection of transverse and longitudinal vertical planes of said side frame.

20. A load-carrying member arranged and constructed for horizontal angling with respect to an associated side frame, said member comprisgage guide columns of said side frame, said side from said side framle engaging portions, and" surfaces on said convoluted portions substantially coradial with a vertical axis formed by the line of intersection of transverse and longitudinal vertical planes of said side frame.

21. In a movable element for use with a railway truck, in combination, spaced side Walls, a pair of surfaces on each side wall substantially coradial with respect to one another, and an outwardly facingadditional surface on each side wall spaced from each pair of surfaces and being substantially coradial therewith.

22. In a movable element for use with a railway truck adapted to angle in a horizontal plane with respect to a side frame, in combination, spaced side walls, a pair of plane surfaces on each side wall substantially coradial with respect to one another, a cylindrical surface on each side wall adjacent at least one of said plane surfaces, said cylindrical surfaces being coaxial with respect to one another, and an additional plane surface on each side wall spaced from each pair of surfaces and being substantially coradial therewith.

23. A side frame comprising spaced vertically disposed members defining an opening therebetween, inner and outer plane surfaces on each of said members substantially coradial with respect to one another, and an additional surface on each of said members spaced outwardly of said vertically disposed members and from said firstnamed surfaces; said additional surfaces being substantially coradial with said first-named surfaces.

DONALD S. BARROWS.

Lil

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