MXPA00005131A - Railway car center filler plate - Google Patents

Abstract

Center filler plates (16;50;50') for mounting on draft sills of railway car underframes are disclosed. The center filler plates have four pockets (96,96') surrounding a hub (62,62'). The pockets are shallower than in the prior art, and the walls defining the pockets (96,96') meet in radii having larger radii of curvature than in the prior art. The shallower pockets (96,96') and larger radii of curvature facilitate removal of the casting from the molding sand in the cope and drag sections of the mold. The formation of burned-in sand is limited in the present invention, and any burned-in sand that does form is also more easily removed from the center filler plates of the present invention. The base portion of the center filler plates (50,50') is not as high as in the prior art. The ribs (90,90') of the center filler plate and the walls of the hub (62,62') are thicker than in the prior art to provide the needed strength to the center filler plates. In one embodiment, the ribs (90) taper toward the hub (62), and the hub is shorter than the surrounding web (76);a tool may be inserted through the kingpin hole, expanded to bear against the tapered surfaces of the ribs (90);a machine may be used to lift the center filler plate and move it into position on the draft sill. The tool may then be contracted and removed, and the center filler plate may be secured to the draft sill through welding or other techniques.

Description

^ CENTRAL FILLING PLATE FOR RAILWAY WAGON BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates generally to a lower frame in the body of a railway car for mounting on a crossbar of a support truck and more specifically to central filling plates for use with guide rails of such lower frames. 2. Description of Prior Art 10 The entire weight of railway freight wagons is conventionally carried on two separate circular central plates in the guide spars of a rail car. These central plates are engaged to two female receptacles coupled to a crossbar of the cooperating truck. Wheelbarrows include sets of wheels, which support the weight of the wagon on the railroad cart. The conventional guide rails have been fabricated or cast in steel. In some guide rails of cast steel, the center plates fuse as an integral part of the guide rails. In some other cast guide stringers and in the guide rails manufactured in a conventional manner, a separate center filler plate is welded or bolted to the guide rail. These plates filling plants have been advantageous since they can be ^ z sa &&&&ss ss retira retira retira retira retira retira retira retira í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í í. Conventional center filler plates have included base portions that are received within the guide rail above a flange. The flange is typically welded on the outside of the guide rail. Exposed below the flange is the support surface of the receptacle of the central plate that is received inside the receptacle of the central plate in the crossbar of the trolley. Above the support surface of the receptacle of the central plate is a central hub for receiving a portion of a master pivot when the guide rail is mounted on the car of the car. Likewise, above the rim and surrounding the central hub is a generally rectangular external core connected to the central hub through four separate ribs. The core and the ribs provide rigidity to the central filling plate to withstand the stresses of the vertical loads and the compressive loads of the crossbar in the body of the rail car. The cavities or deep depressions are defined by the cube, the ribs and the sides of the soul. To handle the center filler plates, the previous structures have included legs formed at the corners of the outer box or core to allow stacking of the center filler plates, as well as to provide the openings between the legs so that the hands of the workers can fit to lift each central filling plate. Conventional center filler plates have been made of cast steel. In such casting operations, the cavities or deep depressions in the central filling plate are defined by the green molding sand from which the casting should be removed after it has cooled. Commonly, identification marks are melted in the central filling plates in proximity of the cavities or depressions. The finishing of the central filling plates has been problematic. At the melting temperature, the sand can get burned inside, that is, the silica of the molding sand becomes very hard. The burnt sand inside does not fall out with the stirring of the casting, and may ruin the marking of the casting part. BRIEF DESCRIPTION OF THE INVENTION The present invention points out the need for a central filler plate from which the molding sand or sand cores can be removed with less work that provides the necessary strength. In addition, one embodiment of the present invention indicates the need for a central filler plate that can be lifted and handled by a machine for installation on a guide rail.

In one aspect, the present invention points out the need for a center filler plate made for a less labor-intensive operation by providing a central filler plate for a railway car that comprises a center plate receptacle and a base plate. central plate. The receptacle of the central plate includes an external support surface, a hole for a master pivot in the center of the support surface and a plurality of opposite internal surfaces of the receptacle. of the central plate. The base of the central plate is in the receptacle of the central plate and includes a hollow cube to receive at least a part of the master pivot. The hub has a central axis that intercepts the external support surface. The central axis is located in the center of the hole for master pivot. The hub joins the inner surfaces of the receptacle of the central plate along the spokes and has a top opposite the junctions with the inner surfaces of the receptacle of the center plate. The base of the central plate has a soul that has a plurality of sides. Each side is joined to at least one of the inner surfaces of the receptacle of the central plate along the spokes. The core has an upper part opposite the junctions of the sides with the internal surfaces of the central plate. The base of the plate central also has a plurality of ribs - separate - f - ^ --- i ««! ¡M * tó t * «S8É¡ÉÉ * & fe7. * ,? ... í * s ^^ a «< s *. ^ &«s! £? # ia; - which extend radially outward from the cube towards the soul. Each rib is positioned between two internal surfaces of the receptacle of the central plate and joins the two inner surfaces of the receptacle of the central plate along the spokes. Each rib has a top opposite the junctions with the inner surfaces of the center plate receptacle. At least one part of the hub extends between the adjacent ribs and at least a part of the core extends between the adjacent ribs. The central filling plate also has a plurality of cavities. Each cavity corresponds to one of the inner surfaces of the receptacle of the central plate and extends along at least a part of a rib, along at least a part of the hub, along at least one part of the rib. a part of the next rib, and along at least part of the core. Each cavity has a maximum vertical depth from the level of the inner surface of the receptacle of the central plate at the level of the upper part of the soul to the level furthest from the level of the inner surface of the receptacle of the central plate. The maximum depth is less than about 12.70 cm (five inches). In another aspect, the present invention points out the need for a center filler plate made for less labor-intensive operation by providing a central filler plate for a rail car comprising a center plate receptacle and a base plate central in the receptacle of the central plate. The receptacle of the central plate includes an external support surface, a hole of the master pivot in the center of the support surface and a plurality of opposite internal surfaces of the receptacle of the central plate. The base of the central plate is in the receptacle of the central plate and includes a hollow cube to receive at least a part of the master pivot. The hub has a central axis that intercepts the external support surface. The central axis is located in the center of the hole of the master pivot. The hub is attached to the inner surfaces of the receptacle of the center plate along the spokes and has a top opposite the junctions with the inner surfaces of the receptacle of the center plate. The base of the central plate has a flange, a soul and a plurality of ribs. The flange has a surface for welding to weld the central filling plate to the guide rail of the rail car. The soul has a plurality of sides. Each side is joined to at least one of the inner surfaces of the receptacle of the central plate along the spokes. The core has a superior part opposite the junctions of the sides with the internal surfaces of the central plate. The ribs extend radially outward from the hub towards the core. Each rib is placed between two internal surfaces of the receptacle of the central plate and joins the two internal surfaces of the receptacle of the central plate along the spokes. Each rib has a top opposite the junctions with the inner surfaces of the center plate receptacle. At least one part of the cube extends between the adjacent ribs and at least a part of the core extends between the adjacent ribs. The flange is at a level between the level of the external support surface and the level of the upper part of the core. The central filling plate also has a plurality of cavities. Each cavity corresponds to one of the internal surfaces of the the receptacle of the central plate and extends along at least a part of a rib, along at least a part of the hub, along at least a part of the next rib, already at length of at least a part of the soul. The central filler plate has a maximum height between the level of the external support surface and the level of the upper part of the core more separated from the level of the external support surface. The soul has a maximum external height between the level of the rim and the level of the upper part of the soul more separated from the level of the external support surface. The proportion of the maximum á2L = 2? ßSSiT • -t - height of the central filling plate with the maximum height of the core is at least three to one. In another aspect, the present invention points out the need for a center filler plate made for less labor-intensive operation by providing a central filler plate for a rail car comprising a center plate receptacle and a base plate central in the receptacle of the central plate. The receptacle of the central plate has an external support surface, a hole of the master pivot in the center of the support surface and a plurality of internal surfaces of the receptacle of the central plate opposite the external support surface. The base of the central plate has a hollow cube to receive at least a part of the master pivot. The hub has a central axis that intercepts the external support surface. The central axis is located in the center of the hole of the master pivot. The hub is attached to the inner surfaces of the receptacle of the center plate along the spokes and has a top opposite the junctions with the inner surfaces of the receptacle of the center plate. The base of the central plate also has a plurality of spaced apart ribs extending radially outwardly of the hub. Each rib is placed between two internal surfaces of the receptacle of the central plate and joins the two surfaces inside the receptacle of? Yes? central lacquer along the spokes. Each rib has a top opposite the internal surfaces of the center plate receptacle. The base of the central plate has a soul opposite the cube. The core is joined to the inner surfaces of the receptacle of the central plate along the spokes and has a top opposite the internal surfaces of the receptacle of the central plate. At least one part of the cube extends between the adjacent ribs and at least one part of the soul extends between the adjacent ribs. The central filling plate has a corresponding cavity with each internal surface of the receptacle of the central plate. Each cavity extends at least between the parts of a pair of adjacent ribs, the part of the soul extending between these ribs, the part of the hub that extends between these ribs and the inner surface of the receptacle of the central plate joined by the spokes to the adjacent ribs, to a part of the core and to a part of the hub. Each of the cavities has a depth from the level of the upper part of a pair of adjacent ribs to the level of the inner surface of the receptacle of the central plate; a depth from the level of the upper part of the part of the soul that extends between these ribs to the level of the internal surface of the receptacle of the central plate; -Y a depth from the level of the upper part of the part of the cube that extends between these ribs to the level of the inner surface of the receptacle of the central plate. For each cavity the ratio between the maximum depth of the cavity and the minimum radius of curvature of the spokes at the joints of the cube, the ribs, the web and the inner surface of the receptacle of the central plate in the cavity is less than 10 to 1. In another aspect, the present invention points out the need for a central filling plate made for a less labor intensive operation by providing a central filler plate for a railway car comprising a receptacle of the central plate and a base of the central plate in the receptacle of the central plate. The receptacle of the central plate has an external support surface, a hole of the master pivot in the center of the support surface and a plurality of internal surfaces of the receptacle of the central plate opposite the external support surface. The base of the central plate has a hollow cube to receive at least a part of the master pivot, a plurality of spaced apart ribs and a core. The hub has a central axis that intercepts the external support surface. The hub has a central axis located in the center of the hole of the master pivot. The hub is attached to the inner surfaces of the receptacle of the center plate along the spokes and has a top opposite the junctions with the inner surfaces of the receptacle of the center plate. The ribs extend radially outward from the hub. Each rib is positioned between two internal surfaces of the receptacle of the central plate and joins the two inner surfaces of the receptacle of the central plate along the spokes. Each rib has a top opposite the internal surfaces of the center plate receptacle. The soul is opposite the cube. The core is joined to the inner surfaces of the receptacle of the central plate along the spokes and has a top opposite the internal surfaces of the receptacle of the central plate. At least one part of the hub extends between the adjacent ribs and at least a part of the core extends between the adjacent ribs. The central filling plate has a corresponding cavity with each internal surface of the receptacle of the central plate. Each cavity extends at least between the parts of a pair of adjacent ribs, the part of the core that extends between these ribs, the part of the hub that extends between these ribs and the inner surface of the receptacle of the central plate joined by the spokes to the adjacent ribs, to a part of the soul and to a part of the cube. The radii that connect the cube, the ribs and the soul with the internal sutferfícies in each of the cavities, each has a radius of a curvature greater than 1.27 cm (0.5 of an inch). In another aspect, the present invention points out the need for a central filler plate that can be driven by a machine for installation on a guide rail by providing a central filler plate for a rail car comprising a receptacle of the central plate and a base of the central plate in the receptacle of the central plate. The receptacle of the central plate has an external support surface, a hole of the master pivot in the center of the support surface and a plurality of internal surfaces of the receptacle of the central plate opposite the external support surface. The base of the central plate includes a hollow cube to receive at least a part of the master pivot, a plurality of spaced apart ribs and a core. The hub has a central axis that intercepts the external support surface. The central axis is located in the center of the hole of the master pivot. The hub is attached to the inner surfaces of the receptacle of the center plate and has a top opposite the junctions with the inner surfaces of the center plate receptacle. The ribs extend radially outwardly from the hollow cube. Each rib is placed between two internal surfaces of the receptacle of the central plate and joins the two internal surfaces of the receptacle of the central plate. Each rib has a top opposite the internal surfaces of the center plate receptacle. The soul extends between the ribs opposite the cube. The core is attached to the inner surfaces of the receptacle of the central plate and has a top opposite the internal surfaces of the receptacle of the central plate. The central filler plate has heights between the level of the external support surface and the levels of the upper parts of the soul, the ribs and the cube. The height of the center filler plate in the hub is less than the minimum height of the center filler plate in the core. The heights of the central filler plate along the ribs gradually decrease from the maximum height at the level of the upper part of the core to a minimum in the cube. BRIEF DESCRIPTION OF THE DRAWINGS In the accompanying drawings, a numbering of similar references has been used for similar parts and: FIGURE 1 is an elevation of a cross member of the body of a railway car assembled with a guide rail and a central plate of filling in the crossbar of the support trolley; FIGURE 2 is a perspective view of a cast guide rail of the prior art and associated with the central filler plate taken from the bottom side and cantilevered end and with the central filler plate placed in a separate relationship below the cavity of the filling center plate; FIGURE 3 is a longitudinal cross-sectional view of the molten guide rail of FIGURE 2, taken along the longitudinal center thereof; FIGURE 4 is a sectional elevation of a part of the guide rail and the mounting of the center filler plate of FIGURE 1; FIGURE 5 is a view of the upper floor, partially in section of a central filling plate of the prior art; FIGURE 6 is an elevation in a partial section of the central filling plate of the prior art of FIGURE 5, taken along line 6-6 of FIGURE 5; FIGURE 7 is an elevation in a partial section of the central filling plate of the prior art of FIGURE 5, taken along line 7-7 of FIGURE 5; FIGURE 8 is a perspective view of the center filling plate of the prior art of FIGURE 5, with the center backfill plate inverted to show the underside of the center fill plate of FIGURE 5; FIGURE 9 is a perspective view of the central filling plate of the prior art of FIGURE 5, showing the upper side of the central filling plate of FIGURE 5; FIGURE 10 is a top plan view, partly in section of a first embodiment of the central filler plate of the present invention; FIGURE 11 is an elevation in a partial section of the central filling plate of FIGURE 10, taken along line 11-11 of FIGURE 10; FIGURE 12 is an elevation in a partial section of the central filling plate of FIGURE 10, taken along line 12-12 of FIGURE 10; FIGURE 13 is a perspective view of the two embodiments of the central filler plate of the present invention, with the central filler plate inverted to show the underside of the central filler plate; FIGURE 14 is a perspective view of the central filling plate of FIGURE 10, showing the upper side of the central filling plate; FIGURE 15 is a top plan view, partially in section of a second embodiment of the central filler plate of the present invention; FIGURE 16 is an elevation in a partial section of the center fill plate of FIGURE 15, taken along line 16-16 of FIGURE 15; FIGURE 17 is an elevation in a partial section of the filled plate of FIGURE 15, taken along line 17-17 of FIGURE 15; FIGURE 18 is a perspective view of the central filling plate of FIGURE 15, showing the upper side of the central filling plate; FIGURE 19 is a view of the top plan, partially enlarged, of the central filling plate of the prior art of Figure 5; FIGURE 20 is a view of the upper plan, partially enlarged, of the central filling plate of Figure 15; FIGURE 21 is a partially sectioned view of the central filling plate of the prior art, showing an enlarged view of the cross section shown in FIGURE 6; FIGURE 22 is a partially sectioned view of the central filler plate of FIGURE 10, showing an enlarged view of the cross section shown in FIGURE 11; FIGURE 23 is a partially sectioned view of the central filling plate of FIGURE 20, showing an enlarged view of the cross section shown in FIGURE 17; FIGURE 24 is a partially sectioned view of the central filling plate of the prior art taken along line 24-24 of FIGURE 19; FIGURE 25 is a partially sectioned view of the central filler plate of FIGURE 20 taken along line 25-25 of FIGURE 20. DETAILED DESCRIPTION As shown in FIGURE 1, conventional rail freight wagons 10 have a lower frame that includes a body cross member 12 that extends transversely to the body of the wagon and intercepts the central stringer of the body of a wagon. Each end of the central beam generally includes a guide beam 14 which receives a guide gear and a coupling mechanism for coupling the two ends of the load car with the other rail freight cars. The illustrated guide rail 14 includes a central filler plate 16 which is normally received within a receptacle of the center plate 18 on a truck crossbar 20. A vertical master pivot 22 extends upwardly through a central core or aperture 24. in the central filling plate 16 and a hole or aperture vertically aligned in the central filling plate of the crossbar of the truck 18 to provide a safe measure against the separation, in the case of vertical displacement in service. A similar connection supports the other end of the rail freight car in a second truck.

Such connections are conventional in the industry and will not be described further. Mention is made herein to "upper", "lower", "horizontal" and "vertical" which relate to the orientation shown in FIGURE 1 and described in relation thereto. The guide stringers 14 that are designed to accept the center filler plates may be of the types disclosed in U.S. Patent Nos. 3,664,269 to Fillion and 4,252,068 to Nolan. FIGURES 2 to 3 of the present application illustrate a guide rail as disclosed and illustrated in the U.S. Patent. No. 4,252,068 granted to Nolan. As shown, this type of guide rail 14 has side walls 26 and trarse interior walls 28 that define a cavity 30. The central filling plate of prior art 16 has an upwardly extending web 32 that fits within the cavity 30 in the guide beam 16. The core 32 is part of a four-sided base 33 above the receptacle of the central plate 34. The receptacle of the central plate has a lower support surface for horizontal loading 36. The receptacle of the central plate 34 is outside the cavity of the guide rail and is received in the receptacle of the central plate 18 in the crossbar of the trolley 20 of a rail car, and the supporting surface 36 abuttingly supports the surface of the rail. horizontal support 3Q in the receptacle of the central plate K »-18. As shown in FIGS. 2 and 4 to 9, the central backfill plates 16 of the prior art typically had ridges 40 around the outer periphery of the sides of the base 33. Conventionally, the flanges 40 were welded to the guide rail 14. to secure the center filler plate 16 to the guide beam 14. FIGURES 1 and 4 illustrate a central filler plate 16 in place within the cavity of the center plate 30 of a conventional guide beam 14. As shown in the FIGURES 6 to 9, the conventional pad plates 16 also had legs 41 at the four corners of the base 33, with depressions 43 between the legs 41. The depressions 43 served as a handle to lift the center filler plates 16 which were stacked in the Leg 41. The support surface 36 of the central filling plate 16, of the prior art, has a hole in the central master pivot 24 in the center of the support surface 36. As shown in FIGS. RAS 6 to 7, the center of the hole of the master pivot 24 is aligned with a vertical or longitudinal central axis 42 of a hollow cube 44. As shown in FIGURES 2 and 8, the central filling plates 16, of the prior art , have two shoulders 46 on the lower face, so that the horizontal load bearing surface 36 is identical to that of a complete cycle. The two embodiments of the center filler plates 50, 50 'of the present invention are shown in FIGS. 10 to 18, 20, 22 to 23 and 25. The illustrated embodiments of the center filler plates of the present invention can be used. with conventional guide stringers 14, such as those illustrated in Figures 2 to 3, as well as in the other designs for guide stringers. The central filler plates 50, 50 'of the present invention can be used with cast iron as well as the fabricated guide beams. The first embodiment of the center filling plate 50 of the present invention is illustrated in FIGS. 10 to 14 and 2. The second embodiment of 1 center filling plate 50 'of the present invention is illustrated in FIGS. 13, 15 to 18. , 20, 23 and 25. In the inverted position, as shown in FIGURE 13, the outer parts of the central packing plate of both embodiments of the present invention are the same, and the reference numbers are used for -both embodiments in FIGURE 13. In both embodiments of the present invention, the central filling plate 50, 50 'has a receptacle of the central plate 51., 51 'which includes a substantially horizontal external support surface 52, 52'. As shown in FIGURE 13, the external support surface 51, 52 'is of a circular bottom surface 54, 54' and has depressions 56, 56 'as in the central filling plates of the prior art. . Both embodiments also have a hole in the master pivot 58, 58 'as in conventional center filler plates, centered on the support surface 52, 52', each mode. As shown in FIGS. 10 to 12, 14 and 15 to 18, opposite the external support surface 52, 52 ', each embodiment has a plurality of internal surfaces of the central plate receptacle 60, 60' substantially horizontal. As shown in FIGURES 10, 14, 15 and 18, there are four internal surfaces of the central plate receptacle 60, 60 'that are substantially parallel to the horizontal external support surfaces 52, 52' of the central plate receptacle 51. , 51 '. The references "internal" or "external" are for the position of the surfaces 52, 52 'and 6', 60 'when mounted on the guide beam, the internal surfaces 60, 60' face the cavity 30 of the crossbar guide and outer surfaces 52, 52 'face outwardly and downwardly to receive the receptacle of the center plate of the trolley cross member 18. Each embodiment of the center fill plate 50, 50' of the present invention, it has a base of the integral center plate 61, 61 'which includes a hollow cube 62, 62' to receive at least a portion of the master pivot. As shown in FIGS. 10 to 12, 15 to 17, 20 and 22 to 23, each hub 62, 62 'has a longitudinal or vertical central axis 64, 64'. The central axes 64, 64 'of the cubes 62, 62' are perpendicular to the horizontal external support surfaces 52, 52 'and intersect the horizontal external support surfaces 52, 52' of both modes and center in the center of the holes of the master pivot 58, 58 '. The cubes 62, 62 'connect the respective internal surfaces of the receptacle of the central plate 60, 60' of the central filling plates 50, 50 'along the radii 66, 66' and have opposite upper parts 68, 68 ' to the junctions with the internal surfaces of the receptacle of the central plate 60, 60 '. The base of the central plate 61, 61 'of each illustrated embodiment also includes four flanges 70, 70', each having a welding surface 72, 72 'for welding the central filling plate to the center of the rail car or to the stringers guide 14. There are positioning bearings 74, 74 'as in the intersections of the previous technique of the four flanges. In each embodiment, the base 61, 61 'includes a core 76, 76' extending upwardly from the shoulders 70, 70 '. The webs 76, 76 'have a plurality of sides 80, 80'. In the illustrated embodiments, there are four sides 80, 80 ', and each side 80, 80' of the core 76, 76 'has approximately the -tfs * ¿-.- Same length. The opposite sides of the web are parallel to each other along substantial portions of their lengths and the adjacent sides are generally perpendicular to each other along substantial portions of their lengths. The four sides intersect at the four corners 82, 82 'defining the curved surfaces. The corners of the core 82, 82 'are generally aligned with the positioning bearings 74, 74'. The webs 76, 76 'connect the inner surfaces of the receptacle of the central plate 60, 60' along the spokes 84, 84 ', along their straight sections and along the radii 86, 86' at the corners 82, 82 '. The webs 76, 76 'have upper portions 88, 88' opposed to the joints of the sides 80, 80 'with the internal surfaces of the receptacle of the central plate 60, 60'. In each embodiment, a plurality of spaced apart ribs 90, 90 'extend radially outwardly from the hub 62, 62' to the web 76, 76 '. The ribs 90, 90 ', the webs 76, 76', the flanges 70, 70 'and the receptacles of the central plate 51, 51' are integral in each illustrated embodiment. As shown in FIGS. 10 and 15, in each of the illustrated embodiments, there are four ribs 90, 90 'centered in two perpendicular vertical planes 91, 91' and 93, 93 'that intersect in the * vertical central axis 64 In the illustrated modes, each rib 90, 90 'joins a side 80, 80' of the web 76 equidistant from this side between the corners 82, 82 '. As shown in FIGS. 10, 14, 15 and 18, each rib 90, SO ^ rí e two adjacent internal surfaces of the receptacle of the central plate 60, 60 'in the spokes 92, 92' and each rib has a upper part 94, 94 'opposite the junctions with the internal surfaces of the receptacle of the central plate 60, 60' Each side of the core 80, 80 'has internal surfaces 95, 95' extending from the upper parts 88, 88 'of the core 76, 76' for joining the inner surfaces of the receptacle of the central plate 60, 60 'along the spokes 84, 84', along the the straight sections and the radii 86, 86 'in the corners. Each side of the soul is divided into two internal sides by one end of a rib 90, 90 '. The internal surfaces 95, 95 'of the webs 76, 76' define the curved projections 97, 97 'at the corners 82, 82' aligned with the positioning bearings 74, 74 '. In each illustrated embodiment, at least a portion of the hub 62, 62 'extends between the adjacent ribs 90, 90'. And in each illustrated embodiment, at least a portion of the core 76, 76 'extends between the adjacent ribs 90, 90'.

Each embodiment of the center filling plate 50, 50 'of the present invention has four cavities 96, 96'. Each cavity 96, 96 'corresponds to one of the internal surfaces of the receptacle of the central plate 60, 60'. Each cavity 96, 96 'extends along at least a portion of a rib 90, 90', along at least a portion of the hub 62, 62 ', along at least a part of the next adjacent rib 90, 90 'and along at least a part of the web 76, 76'. In the illustrated embodiments, each cavity extends along the portions of two intersecting sides 80, 80 'of the core 76, 76' and of a corner 82, 82 'of the core. Each illustrated cavity includes one of the projections 97, 97 'at the corners 82, 82' of the webs 76, 76 '. So that each illustrated cavity 96, 96 'extends horizontally at least between a pair of adjacent ribs, the part of the core that extends between these ribs, the part of the hub that extends between these ribs and the internal surfaces. of the receptacle of the central plate 60, 60 'joined by the spokes, to the adjacent ribs, to the part of the core and to the part of the hub. Each cavity 96, 96 'extends vertically from the levels of the upper parts, 68, 68 ', 88, 88' and 94, 94 'of the hub 62, the core 76, 76' and the ribs 90, 90 'at the level of the internal surfaces of the receptacle of the central plate 60, 60' located between the adjacent ribs, the soul and the cube. Comparing the central filling plates 50, 50 'of the present invention with the central filling plates 16 of the prior art illustrated in FIGURES 2 and 4 through 9, the central filling plates of the present invention have shallower cavities, ribs thicker and larger radii of the radius curvature at the intersections of the ribs, the web, the hub and the inner surfaces of the central plate receptacle. These differences result in a central filler plate that can be more easily finished with easier removal of any burnt sand inside the casting. This improvement in manufacturing is achieved without sacrificing the strength required for the center filler plate. Although there may be differences in the strength of the prior art, it is expected that the present invention will provide adequate strength. And in case there are undesirable stresses, steps can be taken to reduce such stresses, such as, the inclusion of an annular wear element in the receptacle of the center plate of the trolley crossbar to deflect the loads on the perimeter of the surfaces of the receptacle of the central plate 52, 52 '. The differences in the structures can be seen from a comparison of FIGS. 19 1 25. It will be understood that the drawings were not drawn to scale, and that the dimensions specified below are the appropriate dimensions for the filling center plates of the prior art and the drawings. central filler plates of the present invention. First, the central packing plates of one of the illustrated embodiments of the present invention have thicker ribs than those of the prior art. As shown in FIGURES 20 and 25, in the illustrated embodiments of the present invention, the ribs 90, 90 'have a smaller thickness TI in the upper portions 94' of the ribs. The thickness is nominally 1.7462 cm (0.6875 of an inch). Of this thickness, the ribs thickened downwards in the direction of the spokes 92 ', joining the ribs 90' with two adjacent internal surfaces of the receptacle of the central plate 60 '. The ribs 90 of the embodiment illustrated in FIGURES 10 through 12, 14 and 22 may also be thicker than the standard ribs of the prior art center plate and may also have a thickness of 1.74 62 cm (0.6875 inch) or a greater thickness. In contrast, in the central backfill plate of the prior art shown in FIGURE 19, the ribs 100 have a nominal thickness T2 of 1.27 cm (0.50 inch) in the upper portions of the ribs, '"t >» «.: tt. *. ßsjigßsadas towards ab &io in the direction of the internal surfaces of the receptacle of the central plate 102. It will be understood that the thicker ribs of the illustrated embodiments of the present invention can be used with other elements of the invention, but that the invention is not it limits the central filling plates with thicker ribs, unless those expressly stated in the claims. Also, the dimensions given for the illustrated embodiments related to the center filler plates are provided solely for purposes of illustration; the present invention is not limited to any particular dimension, except for those expressly stated in the claims. In the illustrated embodiments of the present invention, the walls of the cubes 62, 62 'are also thicker compared to those of the prior art. The thickness of the hub wall, measured radially equidistant from the ribs 90, 90 ', as shown in T3 in FIGURE 20, in the embodiments illustrated is nominally 1.66 to 1.98 cm (0.655 to 0.78 in.). In contrast, the thickness of the cube wall, measured equidistantly from the ribs, as shown in T4 in FIGURE 19, typically had a nominal value of 1.27 cm (0.50 of an inch). The external walls of the cubes of the present invention are also curved, in opposite manner to the straight walls of the cubes of the illustrated prior art. It will be stated that it will be $ | > The thicker cubes and curved bowls of the illustrated embodiments of the present invention are made with other elements of the invention, but which do not extend to the thick and curved central filling plates, unless expressly stated in the claims. Also, the dimensions provided for the illustrated embodiments of the center filler plates are provided solely for purposes of illustration; the present invention is not limited to any particular dimension, except for what is expressly stated in the claims. Considering the spokes joining the cubes, the ribs and the souls of the illustrated embodiments of the invention, radii of curvature larger than those of the prior art are provided. As shown in FIGURE 20, in the present invention, the spokes joining the cubes 62 'with the ribs 90', have radii of curvature designated Rl 'and R2'; these radii Rl 'and R2' each have a nominal value of 2.54 cm (one inch). The spokes joining the ribs 90 'with the web 76' have radii of curvature designated R3 'and R4' in FIGURE 20; these radii of curvature are also nominally 2.54 cm (one inch) in the illustrated mode. The spokes at the corners 82 'of the core 76' have radii of curvature designated R5 'and R6' in FIGURE 20; of curvature are all nominally inches) in the illustrated mode. The other embodiment of the invention will also have nominal radii of curvature of 2.54 cm (one inch) at these locations. In contrast, in the prior art, spokes at analogous locations have radii of curvature, designated R7 to Rll in FIGURE 19, of a nominal value of 1.27 cm (0.50 inch). It will be understood that the radii of the illustrated embodiments of the present invention can be used with other elements of the invention, but that the invention is not limited to the central filler plates with these larger radii, unless expressly stated in the drawings. claims. Also, the dimensions provided for the radii of the illustrated embodiments of the center filler plates are provided solely for purposes of illustration; the present invention is not limited to any particular dimension of a radius, unless by what is expressly stated in the claims. Considering the spokes 66, 66 'connecting the cubes 62, 62' with the internal surfaces 6060 'of the receptacles of the central plate, radii of curvature larger than those of the prior art are provided. In FIGURES 22 and 23, these radii of greater curvature are designated R12 and R12 ', and nominally they are 2.54 cm (a so-called). In contrast, in the prior art, the radii of analogous curvature have to be nominally 1.27 cm (0.50 in.), As shown in R13 and R14 of FIGURE 21, and have been joined by a straight segment 99. It will be understood that the radii of the illustrated embodiments of the present invention can be used with other elements of the invention, but that the invention is not limited to the central filler plates with these larger radii, unless expressly stated in the claims. Also, the dimensions provided for the spokes of the illustrated embodiments of the center filler plates are provided solely for purposes of illustration; the present invention is not limited to any particular dimension of a radius, unless by what is expressly stated in the claims. Considering the spokes 84, 84 'connecting the inner surfaces 60, 60' of the receptacles of the central plate with the internal surfaces 95, 95 'of the core, radii of curvature larger than those of the prior art are provided. . In FIGURES 22 and 23, these largest radii of curvature are designated R15 and R16 ', and nominally they are 2.54 cm (one inch). In contrast, in the prior art, the radii of analogous curvature must be nominally 1.27 cm (0.50 of an inch); one of the spokes is designated R17 in FIGURE 21. It will be understood that the rJSa s the present invention can be used with BP < elements of the invention, but that the invention is not limited to the central filler plates with these larger radii, unless expressly stated in the claims. Also, the dimensions provided for the radii of the illustrated embodiments of the center filler plates are provided solely for purposes of illustration; the present invention is not limited to any particular dimension of a radius, unless by what is expressly stated in the claims. In the illustrated embodiments of the present invention, the inner surface of the web 95, 95 'at the corners 82, 82' is also formed by two curves, each having a radius of curvature nominally of 2.54 cm (one inch). These radios are shown in FIGURE 23 in R18 'and R19'. The radii shown in R18 'and R19' define a projection 97 'in this corner of the core. The internal surfaces 95 of the core 76 at the corners of the other illustrated embodiment of the present invention will also have curves of the radius of 2.54 cm (one inch) to define the projection 97. In the central filling plates of the prior art, the curves Analogs had radii nominally of 1.27 cm (0.50 of an inch). It will be understood that the radii of the surfaces of the web 95, 95 'of the illustrated embodiments of the present invention can be used with B f * with others e emlij | ßtt f < the invention, but that the invention is not limited to the central filling plates with these soul surfaces, unless they are claims. for radii the illustrated modalities of soul surfaces are provided solely for purposes of illustration; the present invention is not limited to any particular dimension of a radius, unless by what is expressly stated in the claims. Considering the spokes 92, 92 'connecting the inner surfaces of the receptacles of the central plate 60, 60' with the ribs 90, 90 ', the radii of curvature in the illustrated embodiments are larger than those of the prior art. These larger radii of curvature are shown at R20 'and R21' in FIGURE 25, and are nominally 2.54 cm (one inch). The radii of the other illustrated modes are also nominally 2.54 cm (one inch). In contrast, in the prior art, shown in FIGURE 24, the spokes in the analogous positions shown in R22 and R23, are nominally 1.27 cm (0.50 inch). It will be understood that the radii of the illustrated embodiments of the present invention can be used with other elements of the invention, but that the invention is not limited to the central filler plates with these larger radii, unless expressly stated in the drawings. claims. Also, the dimensions provided for the radii of the illustrated embodiments of the center filler plates are provided solely for purposes of illustration; the present invention is not limited to any particular dimension of a radius, unless by what is expressly stated in the claims. The heights of the illustrated center filler plates of the present invention are less than the heights of the center filler plate, of the previous technique. The central filler plates of the present invention have vertical heights along the parallel lines in the longitudinal central axes 64, 64 'of the cubes 62,62'. The heights are measured from the levels of the external support surfaces 52, 52 'of the receptacles of the central plate 51, 51' to the levels of the upper part 88, 88 'of the webs 76, 76' of the bases of the central plate 61, 61 '. The maximum height is at the level of the upper portions 88, 88 'of the webs 76, 76' vertically further apart from the levels of the external support surfaces 52, 52 'of the central plate receptacles 51, 51'. These maximum heights are designated Hl and Hl 'in FIGURES 22 and 23. In the illustrated modes, these dimensions vary from a nominal value of 11.58 to 12.21 cm (4.56 to 4.81 inches). The webs 76, 76 'have vertical exterior heights, along the lines parallel to the longitudinal central axes 64, 64' of the cubes 62, 62 '. The outer heights of the soul are from the levels of the flanges 70, 70 'to the levels of the upper portions 88, 88' of the webs 76, 76 '. More particularly, the outer soul heights are measured from the levels of the tops of the solder surfaces of the flanges 70, 70 ', at the level of the tops of the positioning bearings 74, 74'. The maximum outer heights of the core are at the levels of the upper portions of the souls vertically further apart from the levels of the external support surfaces 52, 52 'of the receptacles of the central plate 51, 51'. The maximum outer height of the core is designated W1 and W2 in FIGURES 22 and 23. In the embodiments illustrated, this dimension is nominally 3.17 cm (1.25 inches). In contrast to the illustrated embodiments of the present invention, in the prior art, the maximum heights of the center filler plates have been at the levels of the legs 41 at the corners of the webs. These maximum heights, shown in H2 in FIGURE 21, have typically varied from 16.51 cm to 17.62 cm (6.5 to 6.94 inches). The heights in the levels of the upper portions of the souls in the depressions 43 between the legs 41 have typically had a nominal value of 13.33 cm to 14.6 (5.25 to 5.75 inches), shown in H3 in FIGURE 21. The heights of the soul external levels of the corners / - shown in * "W2 in FIGURE 21, to 31 cm (1.94 to 2.88 inches) in the levels of ^ 'depressions 43 along the web between the feet 41, shown in W3 in FIGURE 21. it is understood FIPA the heights of the center filler plate and the heights of the outer web of the illustrated embodiments of the present j? wén.ción can be used with other elements of the invention, but the invention is not limited to the central filler plates with these heights, unless expressly set forth in the claims. also, the dimensions given for the heights of the illustrated embodiments related to the central filler plates are provided for purposes only illustration; the present invention is not limited to any dimension of a particular height, except for those expressly stated in the claims. The vertical heights of the center filler plates 50, 50 'from the levels of the external support surfaces 52, 52' to the levels of the ridges 70, 70 'are approximately the same in both illustrated embodiments of the present invention and in FIG. the central filling plate typical of the prior art. So the central filling plates of the prior art and plates central reinforcements invention A similar outer profile when mounted on a guide rail. Accordingly, the central filler plates of the present invention will be interchangeable with the center plates to maintain the same distance from the rail to the guide rail. So it can be seen in the illustrated embodiments of the present invention, the base of the central plate 61, 61 'comprises a smaller part in the height of the central filling plate than in the prior art. In the prior art, the ratio between the maximum height of the central filling plate with the maximum external height of the core typically varies approximately from 1.81: 1 to 2.05: 1 at the corners of the central filling plates, but in the illustrated modes of the present invention, the relationships between the maximum heights of the center filler plates with the maximum heights of the webs is at least three to one; more specifically, the relationships in the illustrated modes are 3.65: 1 and 3.85: 1. The practical result of these shorter base sections is that the height of the core received within the guide rail cavity is smaller than in the prior art. However, particularly if the ribs are thicker as described above, this reduction would not affect S f < Adversely the resis / ten | of the fillings. It is understood (lferlas relations of the modalities of heights, unless those expressly stated in the claims. Also, the values given in the illustrated embodiments of the center filler plates are provided solely for purposes of illustration; the present invention is not limited to any proportion between particular heights, unless by those expressly stated in the claims. The illustrated embodiments of the present invention provide shallower cavities 96, 96 'to facilitate the removal of the casting from the molding sand after casting, and more particularly to facilitate the removal of any burnt sand inside the pieces. melted The cavities 96, 96 'of the filling plates 50, 50' of the present invention have vertical depths, along the lines parallel to the longitudinal central axes 64, 64 'of the cubes 62, 62'. In the embodiment of FIGS. 10 to 12, 14 and 22, the maximum vertical depths of the cavities are from the levels of the inner surfaces of the receptacle of the central plate 60 to the levels of the upper portions 88 'of the corners souls. 82 of the plates souls 76, most spaced apart from the level of the inner surfaces 5 of the receptacle of the central plate 60. In the embodiment of FIGS. 15 to 18, 20 and 23, the maximum vertical depth from the levels of the inner surfaces of the receptacle of the central plate 60 'is the same in the levels of the upper parts 68', 88 'and 94' of the cube 62, the soul and the ribs. For cavity 96 ', the maximum depth is at the level of the upper parts 68', 88 'and 94' of the hub 62, the core 76 'and the ribs 90' as far as possible from the level of the internal surfaces of the plate receptacle. 60 'central. The maximum depth is designated DI and DI ' in FIGURES 22 and 23. In the illustrated embodiments, this dimension is less than 12.70 cm (5 inches), and more specifically is nominally 9.04 (3.56 inches). In contrast to the illustrated embodiments of the present invention, the maximum depths of the cavities of the central filling plates of the prior art have been at the levels of the legs 41 at the corners of the webs. These maximum depths, shown in D2 in FIGURE 21, have typically varied from a nominal value of 13.33 cm to 14.45 cm (5.25 to 5.69 inches) (5-25 11/16). The depths from the level of the parts zM- m the radii of curvature can be expressed as a proportion. In the for each cavity the proportion of the maximum pr of the cavity with the minimum radius of curvature of the spokes in the joints of the cubes, ribs, core and the inner surface of the receptacle of the central plate in the cavity is less than 10 to 1, and in the modes illustrated, the ratio is 3.56: 1. In contrast, in the prior art, the ratio is more typically between 10.51: 1 to 11.38: 1. It will be understood that this proportion can be used with other elements of the invention, but that the invention is not limited to the central filling plates with these proportions, unless expressly stated in the claims. Also, the particular proportions are provided solely for purposes of illustration and the invention is not limited to a particular proportion, except for those expressly stated in the claims. As discussed above, some of the central backfill plates of the prior art had depressions or handles 43 defined on the parallel sides of the core. Such depressions or handholds are illustrated in FIGS. 5 to 9 and 23 with the number 43, between the feet 41 at the corners of the base 33. The feet 41 and the lowered handles 43 allowed the power plants to be refined. Prior to being stacked and stored prior to assembly with the guide rails, they also allowed them to be quickly lifted to insert the hands or tools into the depressions or handgrips 43 between the legs 41 to move the center filler plates towards the guide rail for mounting. Shallow depressions or niches may be formed in the walls of the core of the present invention to allow the insertion of thin tools to lift the center filler plates for assembly with the guide rails, although in both illustrated embodiments of the present invention, each one of the upper parts 88, 88 'of the sides 80, 80' in the webs 76, 76 'is situated in a single plane. The embodiments of the present invention illustrated in FIGS. 10 to 13 and 22 provide an alternate design for lifting the center filler plates of the present invention. In the embodiments of FIGS. 10 to 14 and 22, the vertical height of the central filling plate, parallel to the longitudinal central axis 64 of the hub 62, varies between the level of the external support surface 53 and the levels of the upper portions. 88, 94 and 68 of the core 76, the ribs 90 and the hub 62. the height of the central filling plate of the hub 62, shown in H4 in FIGURE 22, is less than the minimum height of the central filling plate in the core 76, shown in Hl in FIGURE 22. The ribs 90 gradually decrease from their "height" to the level of the top 88 of the core 76 to their minimum heights in the hub 62. Therefore, the depth of the cavities 96 in the hub 62, shown in D5 in FIGURE 22, is smaller than the depth DI in the core 76. All four ribs have the same configuration in the embodiment of FIGURES 10 through 14 and 22. With the ribs thus configured, the central filler plates can be stacked in an inverted position, as shown in FIGURE 13, with its external support surfaces 52 facing upwards. A tool can be inserted through the hole in the master pivot 58 and expanded once the hub 62 has been released. The expanded tool can exert pressure against the inclined upper portions 94 of the ribs 90 and, consequently, the plate 50 filling center can be lifted by raising the tool. The central filling plate 50 can be placed in the cavity 30 of the central filling plate of a conventional inverted guide rail 14. The tool can be contracted and removed through the hole of the master pivot 58, leaving the central filler plate seated in the four positioning lugs 74 on the surface of the guide rail. The central filler plate can be welded to the guide rail around the weld surfaces 72 of the flanges in a convoluted manner? . the tool inserted in the hole 58 of the master pivot of the central filling plate can be part of a conventional lifting machine. Thus, the embodiment of FIGURES 10 to 14 and 22 allows lifting and moving the central filling plates assisted by a machine. Both embodiments of the present invention can be fused from conventional materials in conventional forms. However, compared to the prior art, with the shallow cavities 96, 96 'of the present invention, the depth of the depression is reduced so that the casting can be removed from the molding sand with less fracture of the sand. of molding. The ejection of the cavities 96, 96 'of the central molten filler plate 50, 50' is facilitated by the increased radii 66, 66 ', 84, 84', 86, 86 'and 92, 92' in the cavities 96, 96 'with the depth of the cavities decreased, Therefore, the finishing time and the difficulties are reduced. It will be understood that the center filler plates of the present invention can be designated with standard guides and reducing devices to facilitate the removal of the cast part from the recessed section and the lower frame section from the mold. Likewise, it will be understood that the benefits of the p # # # "can also be realized in applications that use sand cores to define the cavities, allowing an easier removal of the sand cores from the casting. They can be used after standard casting practice when making molds, cores and castings The increased radii 66, 66 ', 84, 84', 86, 86 'and 92, 92' also serve to reduce the stress on the joints of the respective walls of the central filling plates and with the increase of the thickness of the ribs 90, 90 'and the cubes 62, 62', the central filling plates of the present invention will continue to satisfy the requirements of strength and durability. It will be understood that while the present invention provides particular advantages for making the molten central filler plates, the principles can also be applied to other types of central filler plates, such as such as forged or machine-made central filling plates. While only the specific embodiments of the invention have been described and shown, it is clear that various alternatives and modifications can be made to it. Those skilled in the art will also recognize that certain additions can be made to the illustrative modifications. Therefore, the intention in L * the appended claims is to cover such alternatives, modifications and additions that may fall within the true scope of the expiration.

Claims (9)

. CLAIMS 1. A central filler plate for a railway car comprising: a receptacle of the central plate including an external support surface, a hole of the master pivot in the center of the support surface and a plurality of internal surfaces of the receptacle of the opposite central plate; a base of the central plate in the receptacle of the central plate, the base of the central plate includes: a hollow cube to receive at least a part of the master pivot, said hub has a central axis that intercepts said support surface external, said central axis is located in the center of said hole of the master pivot, said hub attached to said internal surfaces of the receptacle of the central plate along the spokes and having a top opposite the junctions with said internal surfaces of the receptacle of the central plate; a core having a plurality of sides, each side joined to at least one of said inner surfaces of the receptacle of the central plate along the spokes, a core having a top opposite the connections of said sides with said sides. internal surfaces of the center plate receptacle; and a plurality of spaced apart ribs extending cube towards the web, each rib is placed between two of said webs. upper part opposite the joints with said internal surfaces of the receptacle of the central plate; at least a part of said hub extending between the adjacent ribs and at least a part of said web extending between the adjacent ribs; the central filling plate having a plurality of cavities, each cavity is corresponding to one of said internal surfaces of the receptacle of the central plate and extends along at least a part of a rib, along with minus one part of the hub, along at least a part of the next rib and along at least a part of the web; each cavity having a maximum depth from the level of said inner surface of the receptacle of the central plate to the level of the upper part of the core at the level most separated from the level of the inner surface of the receptacle of the central plate, said maximum depth is less than about 12.70 cm (five inches). 2. The central filler plate of claim 1 where the sides ^ a¡ to? Ñá intersect at the corners along the curved surfaces. 3. The central filler plate of claim 1, wherein the upper portions of the sides of the core lie in a single plane. 4. The central packing plate of claim 1, wherein the minimum thickness of the ribs is greater than 1.27 cm (0.5 inch). 5. The central filler plate of claim 4, wherein the minimum thickness of the ribs is greater than

1. 74 cm (0.6875 of an inch). 6. The central filler plate of claim 1, wherein all radii are at least 2.54 cm (one inch). 7. The central filler plate of the claim 1, wherein the cube comprises a wall with a minimum thickness greater than 1.27 cm (0.5 inch). 8. The central filler plate of claim 7, wherein the minimum thickness of the cube wall is 1.65 cm (0.65 inch). 9. The central filler plate of claim 1, wherein the depth of the cavity is 9.04 cm (3.5625 inches) or less. 10. The central filler plate of claim 1, wherein the ratio of the maximum depth of curvature of the joints to the perimeter walls and the inner surfaces of the central plate receptacle is less than jj "11. The central plate of filling of claim 1, wherein said central filling plate has heights between the level of the external support surface and the levels of the upper parts of the hub, the ribs and the core; and the height of said central filling plate in said hub is smaller than the height of said central filling plate in said core, the heights of said ribs gradually decrease in the direction of said hub. 1

2. A central filler plate for a railway car comprising: a receptacle of the central plate including an external support surface, a hole of the master pivot in the center of the support surface and a plurality of internal surfaces of the receptacle of the opposite central plate; a base of the central plate in the receptacle of the central plate, the base of the central plate includes: a hollow cube to receive at least a part of the master pivot, said hub has a central axis that intercepts said support surface external, said central axis is located from said hole of the master pivot, said hub attached to said inner surfaces of the receptacle of the central plate along the spokes and having a top opposite the junctions with said internal surfaces of the receptacle of the central plate; a flange having a welding surface for welding the central filling plate to the center rail of the railway car; a core having a plurality of sides, each side joined to at least one of said inner surfaces of the receptacle of the central plate along the spokes, a core having a top opposite the connections of said sides with said sides. internal surfaces of the center plate receptacle; and a plurality of spaced apart ribs extending radially outward from said hub towards the web, each rib is positioned between two of said inner surfaces of the receptacle of the center plate and is joined to said internal surfaces of the receptacle of the central plate to along the radii, each rib has an upper part opposite the junctions with said internal surfaces of the receptacle of the central plate; at least a part of said hub extending between the adjacent ribs and at least a part of said web extending between the ribs in the superfluous side opposite the hollow cube to receive at least a portion of the web. master pivot, said hub has a central axis that intercepts said external support surface, said central axis is located in the vicinity of said hole of the master pivot, said hub is joined to said internal surfaces of the receptacle of the central plate as length of the spokes and having a top opposite the junctions with said internal surfaces of the receptacle of the central plate; a plurality of spaced apart ribs extending radially outwardly of said hub, each rib is placed between two said inner surfaces of the receptacle of the center plate and is joined to said inner surfaces of the receptacle of the central plate along the spokes, each rib has a top opposite the junctions with said inner surfaces of the center plate receptacle; and a soul opposite said hub, said web is joined to said receptacle surfaces of the central plate along the spokes and has a top opposite said receptacle surfaces of the central plate; adjacent; said re ee is a at a level between the level of said support surface - "jpterna and the level of the upper part of said core;" 5 the central filling plate having a plurality of cavities, each cavity is corresponding with a of said inner surfaces of the receptacle of the central plate and extends along at least a part of a rib, along at least a part 10 of the hub, along at least a part of the next rib and along at least a part of the web, said central filler plate having a maximum height between the level of the external support surface and the level of the upper part of the web as far as possible from the level of the web. external support surface, said core having a maximum external height between the level of the upper part of the core more separated from the level of the external support surface, wherein the proportion of the maximum height of the central filling plate with said maximum height of the soul is at least three to one. 1

3. A central filler plate for a railway car comprising: a receptacle of the central plate having an external support surface, a hole of the master pivot ' "F ^^ lim" ^^ ^ ñffiíirftt Í ^;. Faith * - - "- ^ ^ Wifíffl so uenos u ?? to part of the hub extending between adjacent and at least a portion of said soul that extends between the adjacent ribs; the center filler plate having a cavity that is corresponding to each inner surface of the receptacle of the central plate, each cavity extending between at least one pair of adjacent ribs, the part of the web extending between these ribs, the part of the hub extending between these ribs, and the inner surface of the receptacle of the central plate joined by the spokes to said adjacent ribs, said part of the web and said part of the hub; each of said cavities has a depth from the level of the upper part of said pair of adjacent ribs to the level of said inner surface of the receptacle of the central plate, a depth from the level of the central part of said part of the core that it extends between these ribs up to the level of said inner surface of the receptacle of the central plate, and a depth from the level of the upper part of said part of the hub extending between these ribs to the level of said inner surface of the receptacle of said hub. the central plate; where for each cavity the proportion of the . 4? ? Z .f £ f¿3 £? ^ ^ ^? < zi £ 7 maximum depth of the cavity with the minimum radius of curvature of said radii at the junctions of the cube, the ribs, the heart and the inner surface of the receptacle of the central plate in said cavity is less than 10 to 1. 1

4. the center filler plate of claim 13 wherein for each pocket the ratio of the maximum depth of the cavity with the minimum radius of curvature of said radii at the junctions of the cube, the ribs, the heart and the inner surface of the receptacle of the central plate in said cavity is less than 4 to 1. The central filler plate of claim 13, wherein the upper part of the core is substantially in a plane. 16. The central filler plate of claim 15, wherein the upper part of the ribs is substantially in a plane. 17. A central filler plate for a railway car comprising: a receptacle of the central plate having an outer support surface, a hole of the kingpin in the center of the support surface and a plurality of inner surfaces of the receptacle of the central plate opposite the external support surface; a base of the central plate in the receptacle of the central plate, the base of the central plate includes: a cute-faue < 6? To receive at least a part of the master pivot ^ said hub has a central axis that intercepts said surface JC &B external support, said central axis is located in the center of said hole of the master pivot, said hub joins said inner surfaces of the receptacle of the central plate along the spokes and having a top opposite the joints with said inner surfaces of the receptacle of the central plate; a plurality of spaced apart ribs extending radially outwardly of said hub, each rib is placed between two said inner surfaces of the receptacle of the center plate and is joined to said inner surfaces of the receptacle of the central plate along the spokes, each rib has a top opposite the junctions with said inner surfaces of the center plate receptacle; and a core extending between said ribs opposite the hub, said web is joined to said receptacle surfaces of the central plate along the spokes and has an upper part opposite said receptacle surfaces of the central plate; at least a part of said hub extending between the adjacent ribs and at least a part of said web extending between the adjacent ribs; ^ S ^ "" a cavity that is corresponding * "with each inner surface of the receptacle of the central plate, each cavity extending between at least a pair of the adjacent ribs, the part of the core extending between these ribs, the part of the hub that extends between these ribs, and the inner surface of the receptacle of the central plate joined by the spokes to said adjacent ribs, to said part of the core and to said part of the hub, said radii are joined to said hub, ribs and the web to said internal surfaces in each of said cavities, each having a radius of curvature greater than 1.2 cm (0.5 in.) 18. The central filler plate of claim 1, wherein said radii are joined said hub, ribs and core to said inner surface in each of said cavities, each having a radius of curvature of at least 2.54 cm (one inch) 19. A central filling plate for a railroad car that they buy of: a receptacle of the central plate having an external support surface, a hole of the master pivot in the center of the support surface and a plurality of internal surfaces of the receptacle of the central plate opposite the external support surface; a base of the central plate in the receptacle of the central plate, the base of the central plate includes: a hollow cube to receive at least a part of the master pivot, said hub has a central axis that intercepts said support surface external, said central axis is located in the center of said hole of the master pivot, said hub is attached to said internal surfaces of the receptacle of the central plate and having a top opposite the junctions with said internal surfaces of the plate receptacle central; a plurality of spaced apart ribs extending radially outwardly of said hollow cube, each rib is placed between two of said inner surfaces of the receptacle of the central plate and is attached to two of the inner surfaces of the receptacle of the central plate, each rib has a top opposite the junctions with said inner surfaces of the receptacle of the center plate; and a core extending between said ribs opposite the hub, said web is joined to said receptacle surfaces of the central plate and has an upper part opposite said receptacle surfaces of the central plate; said central filler plate has heights between the level of the external support surface and the levels of the upper parts of the? &, ribs and the hub; wherein the widths of said central filling plate is less than the minimum height of said central filling plate in said core, the heights e said central filling plate along the ribs gradually decrease from a maximum height to the part level. superior of the soul to a minimum height in the cube. 20. The central filler plate of claim 1, wherein a cavity corresponding to each internal surface of the receptacle of the central plate extends between the adjacent ribs, the part of the core extending between these ribs, the part of the hub that it extends between these ribs and the part of the internal surface joined to said adjacent ribs, to said part of the core and to said part of the hub; each of said cavities has a maximum depth from the level of the upper parts of at least one of said pair of adjacent ribs, said part of the core and said part of the hub at the level of said internal surfaces; and wherein the ratio of the maximum depth of the cavity to the minimum thickness of the ribs is less than 10 to 1. The central filler plate of claim 19, which further includes ridges around the core for welding the plate. Central filling to the center rail of the railroad car, the maximum height of said web from the level of the shoulders to the top of the core is less than about 5.08 cm (two inches). They are given to filling stations to be mounted on guide rails of the lower frames of a railway car. The central filler plates have four cavities around the cube. The cavities are shallower than in the prior art, and the walls defining the cavities satisfy the radii that have radii of curvature larger than those of the prior art. The shallow cavities and larger radii of curvature facilitate the removal of castings from the molding sand in the recessed section and the lower frame section of the mold. The formation of burnt sand in the interior is limited in the present invention, and any burnt sand in the interior that is formed is also easier to remove from the center filler plates of the present invention. The base portion of the central filling plates is not as high as those of the prior art. The ribs of the central filling plate and the walls of the hub are thicker than in the prior art to provide the necessary strength to the central filling plates. In one embodiment, the ribs gradually decrease in the direction of the cube, and the cube is shorter than the surrounding soul; a tool can be inserted through the hole of the master pivot, expanding to exert pressure against those of the ribs; a machine can be used to lift the central filler plate and move it to its porfgtóli on the guide rail. The tool can contract -? - 8PF 'to be removed, and the central filler plate can be secured to the guide by means of welding or other technique.