CN214138519U - Lower side beam structure, carriage and railway wagon - Google Patents

Abstract

The utility model relates to a lower side beam structure, carriage and railway freight car, lower side beam structure include riser, swash plate, backup pad and bottom plate. The inclined plate comprises a first surface and a second surface which are oppositely arranged. The first surface is used for setting towards the inside of the carriage, and the second surface is used for deviating from the inside of the carriage. The vertical plate is connected to one end of the inclined plate, and an obtuse angle (marked as alpha) is formed between the plate surface of the vertical plate and the first surface. One end of the supporting plate is connected to the second face, and one end of the bottom plate is connected to the second face. The other end of the supporting plate is connected with the other end of the bottom plate. The inclined plate, the bottom plate and the supporting plate form a triangular structure in a surrounding mode, and the triangular structure has better stability and strength rigidity, so that the rigidity and the strength of the lower side beam structure are improved. Because this lower side roof beam structure is platelike structure, lighter than traditional rectangle section roof beam, be favorable to reducing the dead weight of low side roof beam structure.

Description

Lower side beam structure, carriage and railway wagon

Technical Field

The utility model relates to a vehicle structure technical field especially relates to a lower side beam structure, carriage and railway freight car.

Background

The railway wagon generally comprises structures such as an underframe, an end wall and side walls, the three are connected with each other to form an integral bearing structure and enclose a vehicle cargo loading space, and the lower side beam is an intersection node of the three and bears various loads in the longitudinal direction, the vertical direction and the transverse direction during vehicle operation. In order to ensure the strength of the railway wagon, the lower side beam of the railway wagon is generally of a rectangular section structure, is made of carbon steel and is connected with other wagon body structures in a welding mode. However, the lower side beam has the defects of self-weight, low strength and rigidity and the like. Along with the rapid development of heavy-duty transportation of railway freight, the lower side beam becomes the bottleneck of the development of the novel railway wagon industry.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is desirable to provide an underside beam structure, a wagon and a railway wagon, which have a light weight and high strength and rigidity.

An underside beam structure comprising:

the inclined plate comprises a first surface and a second surface which are oppositely arranged, the first surface is used for being arranged towards the interior of a carriage, and the second surface is used for being arranged away from the interior of the carriage; the vertical plate is connected to one end of the inclined plate, and an obtuse angle is formed between the plate surface of the vertical plate and the first surface; one end of the supporting plate is connected to the second face, one end of the base plate is connected to the second face, and the other end of the supporting plate and the other end of the base plate intersect.

The lower side beam structure at least has the following beneficial effects:

the lower side beam structure that this embodiment provided includes riser, swash plate, backup pad and bottom plate, and the one end of backup pad is connected in the second face, and the one end of bottom plate is connected in the second face, and the other end of backup pad and the other end of bottom plate link to each other. The inclined plate, the bottom plate and the supporting plate form a triangular structure in a surrounding mode, and the triangular structure has better stability and strength rigidity, so that the rigidity and the strength of the lower side beam structure are improved. Because this lower side roof beam structure is platelike structure, lighter than traditional rectangle section roof beam, be favorable to reducing the dead weight of low side roof beam structure.

The technical solution is further explained below:

in one embodiment, the lower side beam structure is an aluminum profile extrusion structure. The lower side beam structure is made of aluminum alloy.

In one embodiment, the inclined plate comprises an upper inclined plate and a lower inclined plate which are connected, one end of the upper inclined plate is connected to the vertical plate, the other end of the upper inclined plate is connected to the lower inclined plate, the supporting plate and the bottom plate are both connected to the lower inclined plate, the thickness of the supporting plate and the thickness of the bottom plate are both smaller than that of the upper inclined plate, and the thickness of the lower inclined plate is smaller than that of the upper inclined plate.

In one embodiment, the thickness of the support plate and the thickness of the base plate are both less than the thickness of the riser plate. The vertical plate and the upper inclined plate are thicker, and are generally more than 10 mm. The thickness of the supporting plate and the bottom plate is 5mm to 10 mm.

In one embodiment, the surface of the lower inclined plate along the direction from the lower inclined plate to the upper inclined plate forms an acute angle with the surface of the bottom plate, and the joint of the bottom plate and the support plate forms an acute angle.

In one embodiment, one end of the vertical plate, which is far away from the lower inclined plate, is provided with a first flange, and the first flange is used for being riveted with a side wall plate of a vehicle body. One end of the lower inclined plate, which is far away from the vertical plate, is provided with a second flange, and the second flange is used for being riveted with a side hopper plate of the vehicle body.

A carriage comprises a cross beam, a sleeper beam and a lower side beam structure according to any one of the embodiments, wherein the sleeper beam and the cross beam are arranged along the width direction of the carriage, the lower side beam structure is arranged along the length direction of the carriage, the end face of the sleeper beam is connected to a lower inclined plate of the lower side beam structure, and the cross beam is arranged at the connecting position of an upper inclined plate and a vertical plate of the lower side beam structure.

The carriage at least has the following beneficial effects:

in the carriage that this embodiment provided, this downside girder construction riveting respectively in sleeper beam, the crossbeam in carriage, three's assembling process is the modularization equipment, and assembling process is simple and convenient. The triangular structure that swash plate, bottom plate and backup pad formed has better supporting role in sleeper beam department, is favorable to promoting the holistic intensity and the rigidity in carriage, can bear heavier goods, is favorable to improving the carrying capacity volume.

The technical solution is further explained below:

in one embodiment, the plate surface of the bottom plate is parallel to the bottom surface of the carriage, and the plate surface of the vertical plate is perpendicular to the plate surface of the bottom plate.

In one embodiment, the lower side frame structure has both ends in the length direction thereof connected to the sleepers, respectively, and a plurality of cross members are connected to the lower side frame structure in the length direction thereof, respectively, and the cross members are located between the sleepers.

In one embodiment, the sleeper beam is connected to the lower inclined plate, and the cross beam is connected to the connection position of the upper inclined plate and the vertical plate.

A railway wagon comprising a wagon as described in any one of the above embodiments.

The railway wagon at least has the following beneficial effects:

the railway wagon provided by the embodiment comprises the carriage as in any one of the above embodiments, the sleeper beam and the cross beam of the carriage are respectively riveted on the lower side beam structure, the assembly process of the sleeper beam, the cross beam and the cross beam is modular, and the assembly process is simple and convenient. One end of the supporting plate is connected to the second surface, one end of the bottom plate is connected to the second surface, and the other end of the supporting plate is connected to the other end of the bottom plate. The inclined plate, the bottom plate and the supporting plate are enclosed to form a triangular structure, the triangular structure has better stability and better strength rigidity, and therefore the rigidity and the strength of the lower side beam structure are improved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a lower side beam structure according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a railway wagon according to an embodiment of the present invention;

FIG. 3 is a right side elevational view of the railway wagon of FIG. 2;

FIG. 4 is an enlarged schematic view of the railway wagon of FIG. 3 at P;

fig. 5 is a schematic structural view of the lower side beam structure connected to the cross beam according to an embodiment of the present invention.

Description of reference numerals: 100. a lower side rail structure; 110. a vertical plate; 120. a sloping plate; 121. an upper sloping plate; 122. a lower sloping plate; 123. a first side; 124. a second face; 130. a support plate; 140. a base plate; 150. a first flange; 160. a second flange; 200. a cross beam; 300. a bolster; 310. a cover plate; 400. a side wall panel; 500. a side funnel plate; 600. riveting; 700. a connecting plate.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

The present embodiment provides a lower side frame structure 100, a wagon and a railway wagon, which have the advantages of light self weight and high strength and rigidity, and will be described in detail with reference to the accompanying drawings.

In an embodiment, please refer to fig. 1, fig. 1 shows a schematic structural diagram of a lower side beam structure according to an embodiment of the present invention. An underside beam structure 100 includes a vertical plate 110, a sloping plate 120, a support plate 130, and a bottom plate 140. The swash plate 120 includes a first surface 123 and a second surface 124 that are oppositely disposed. The first face 123 is adapted to be disposed toward the interior of the vehicle cabin and the second face 124 is adapted to be disposed away from the interior of the vehicle cabin. The vertical plate 110 is connected to one end of the inclined plate 120, and an obtuse angle (denoted as α) is formed between the plate surface of the vertical plate 110 and the first surface 123. One end of the supporting plate 130 is connected to the second face 124, and one end of the base plate 140 is connected to the second face 124. The other end of the support plate 130 is connected to the other end of the base plate 140.

The lower side beam structure 100 provided by this embodiment includes a vertical plate 110, a sloping plate 120, a supporting plate 130 and a bottom plate 140, wherein one end of the supporting plate 130 is connected to the second surface 124, one end of the bottom plate 140 is connected to the second surface 124, and the other end of the supporting plate 130 is connected to the other end of the bottom plate 140. That is, the inclined plate 120, the bottom plate 140 and the support plate 130 form a triangular structure, and the triangular structure has better stability and strength rigidity, thereby being beneficial to improving the rigidity and strength of the lower side sill structure 100. Since the lower side beam structure 100 has a plate-like structure, it is lighter than a conventional rectangular cross-section beam, which is advantageous for reducing the self weight of the lower side beam structure 100.

In one embodiment, referring to fig. 1, the lower side beam structure 100 is an aluminum profile extrusion structure. Specifically, lower side beam structure 100 adopts the aluminum alloy material, replaces steel material, is favorable to alleviateing the dead weight, realizes lower side beam structure 100's lightweight, and the aluminum alloy material still has better corrosion resistance, helps prolonging lower side beam structure 100's life. Further, the lower side beam structure 100 is manufactured by adopting an aluminum profile extrusion process, the section structure and the size of the lower side beam structure can meet the requirement of a complex section, the thickness of each part of the lower side beam structure 100 can be flexibly selected, and different wall thicknesses can be adopted on the basis of the theory of the equal-strength beam.

In one embodiment, referring to fig. 1, the inclined plate 120 includes an upper inclined plate 121 and a lower inclined plate 122 connected to each other. One end of the upper inclined plate 121 is connected to the vertical plate 110, the other end of the upper inclined plate 121 is connected to the lower inclined plate 122, and the support plate 130 and the bottom plate 140 are both connected to the lower inclined plate 122. Specifically, one end of the support plate 130 is connected to the lower inclined plate 122, one end of the bottom plate 140 is also connected to the lower inclined plate 122, a distance from a connection point of the bottom plate 140 and the lower inclined plate 122 to the vertical plate 110 is greater than a distance from a connection point of the support plate 130 and the lower inclined plate 122 to the vertical plate 110, one end of the bottom plate 140, which is far away from the lower inclined plate 122, is connected to one end of the support plate 130, which is far away from the lower inclined plate 122, that is, a portion of the support plate 130, the bottom plate 140 and the lower inclined plate 122 enclose to form a triangular structure. The triangular structure has better stability and better strength and rigidity, thereby contributing to the improvement of the rigidity and strength of the lower side sill structure 100. The thickness of the support plate 130 and the thickness of the bottom plate 140 are both smaller than the thickness of the vertical plate 110 and the upper inclined plate 121. The thickness of the lower swash plate 122 is smaller than that of the upper swash plate 121. Specifically, the vertical plate 110 and the upper inclined plate 121 have a relatively thick thickness, generally 10mm or more, to bear the load of the vehicle. The thickness of the support plate 130 and the bottom plate 140 is 5mm to 10 mm. Due to the design, on the premise that the lower side beam structure 100 has good strength, the self weight of the lower side beam structure 100 can be reduced, and the light weight of the railway wagon is favorably realized.

In one embodiment, referring to fig. 1, 4 and 5, fig. 4 is an enlarged view of the railway wagon shown in fig. 3 at P, and fig. 4 is a view illustrating the connection between the lower side sill structure 100 and the bolster 300. Fig. 3 shows a schematic structural diagram of a railway wagon. Fig. 5 is a schematic structural diagram illustrating the connection of the lower side beam structure 100 to the cross beam 200 according to an embodiment of the present invention. The plate surface of the lower swash plate 122 in the direction from the lower swash plate 122 to the upper swash plate 121 forms an acute angle (β) with the plate surface of the bottom plate 140. The included angle that bottom plate 140 and backup pad 130 junction formed is the acute angle (record as gamma), and swash plate 120, bottom plate 140 and backup pad 130 enclose into a triangle-shaped structure promptly, and the triangle-shaped structure has better stability and better intensity rigidity to be favorable to improving the rigidity and the intensity of lower side sill structure 100, the triangle-shaped structure that swash plate 120, bottom plate 140 and backup pad 130 formed has better supporting role in sleeper beam 300 department, is favorable to promoting the holistic intensity and the rigidity in carriage, can bear heavier goods, is favorable to improving the carrying capacity volume.

Further, referring to fig. 1 and fig. 2, a first flange 150 is disposed at an end of the vertical plate 110 away from the lower sloping plate 122, and the first flange 150 is riveted to a side wall plate 400 of the vehicle body. The end of the lower sloping plate 122 away from the vertical plate 110 is provided with a second flange 160, and the second flange 160 is used for riveting with the side hopper plate 500 of the vehicle body. Thus, the lower sill structure 100 is mounted between the side wall panel 400 and the side funnel panel 500 via the first and second flanges 150 and 160.

In one embodiment, referring to fig. 2, 4 and 5, a car includes a cross member 200, a bolster 300 and an underside beam structure 100 as described above in any of the embodiments. The bolster 300 and the cross member 200 are both disposed along the width direction of the vehicle compartment (the width direction of the vehicle compartment is shown by an arrow S in fig. 3). The lower side beam structure 100 is disposed along the longitudinal direction of the car, the end surface of the bolster 300 is connected to the lower inclined plate 122 of the lower side beam structure 100, and the cross beam 200 is disposed at the connection position of the upper inclined plate 121 and the vertical plate 110 of the lower side beam structure 100. The length direction of the carriage is the same as the advancing direction of the carriage, and the width direction of the carriage is perpendicular to the length direction of the carriage. The plate surface extension direction of the lower side beam structure 100 is the same as the longitudinal direction of the vehicle compartment, and the plate surface extension direction of the lower side beam structure 100 is the longitudinal direction of the lower side beam structure 100. The length direction of the bolster 300 and the length direction of the cross member 200 are perpendicular to the length direction of the lower side beam structure 100.

In an embodiment, referring to fig. 1 to 3, since the car includes the lower side beam structure 100, the technical effect is brought by the lower side beam structure 100, and the beneficial effects already include the beneficial effects of the lower side beam structure 100, and therefore, the detailed description thereof is omitted.

Further, referring to fig. 1 and 2, two ends of the lower side beam structure 100 along the length direction thereof are respectively connected with the sleepers 300, along the length direction of the lower side beam structure 100, the plurality of cross beams 200 are respectively connected with the lower side beam structure 100, and the plurality of cross beams 200 are located between the sleepers 300. Specifically, the cross beams 200 are distributed between two corbels 300, and the plurality of cross beams 200 are respectively laid between the two corbels 300 in parallel at intervals.

In one embodiment, referring to fig. 1, 4 and 5, the plate surface of the bottom plate 140 is parallel to the bottom surface of the car, and the plate surface of the upright plate 110 is perpendicular to the plate surface of the bottom plate 140. The bolster 300 includes a cover plate 310, and the face of the base plate 140 is adapted to fit over the face of the cover plate 310. The deck 310 is the side of the bolster 300 that faces the bottom of the vehicle compartment. Specifically, when the lower swash plate 122 of the lower side rail structure 100 and the bolster 300 are riveted, the lower swash plate 122 is cut off along the plane of the bottom plate 140, and the bottom plate 140 is attached to the surface of the cover plate 310 away from the bottom of the vehicle compartment, so that the triangular structure formed by the bottom plate 140, the support plate 130 and the lower swash plate 122 is seated on the cover plate 310 of the bolster 300.

Further, referring to fig. 4 and 5, the bolster 300 is connected to the lower inclined plate 122, and the cross beam 200 is connected to a connection portion of the upper inclined plate 121 and the vertical plate 110. Specifically, the bolster 300 is riveted to the lower inclined plate 122, and the cross beam 200 is riveted to the connection between the upper inclined plate 121 and the vertical plate 110. The riveting means that the lower side beam structure 100, the bolster 300, the cross member 200, and the like are connected by rivets 600. The riveting has the advantages of stable connection, high strength, difficult damage, convenient use and detachability. A connecting plate 700 is attached to a surface of the lower side frame structure 100 facing the interior of the vehicle compartment, and a rivet 600 is inserted through the lower side frame structure 100 and the connecting plate 700 in this order and then connected to the bolster 300. The lower side beam structure 100 is riveted to the sleeper beam 300 and the cross beam 200 of the carriage respectively, the assembling process of the sleeper beam 300 and the cross beam 200 belongs to modular assembly, and the assembling process is simple and convenient. It is understood that the above connection manner may be a bolt connection manner, a snap connection manner, and the like, besides the riveting manner, and is not limited specifically herein. The cover plate 310 of the sleeper beam 300 is attached to the bottom plate 140, and a triangular structure formed by the inclined plate 120, the bottom plate 140 and the supporting plate 130 has a better supporting effect at the sleeper beam 300, so that the overall strength and rigidity of the carriage are improved, heavier goods can be borne, the carrying capacity is improved, and greater transportation economic benefits can be realized.

In one embodiment, referring to fig. 2 and 3, a railway wagon includes a wagon as described above in any one of the embodiments. In one embodiment, since the railway wagon comprises the carriage, the technical effects brought by the railway wagon already include the advantages of the railway wagon, and therefore, the detailed description is omitted here. Wherein the railway wagon can be a hopper wagon for railway transportation.

The lower side beam structure 100 provided by this embodiment includes a vertical plate 110, a sloping plate 120, a supporting plate 130 and a bottom plate 140, wherein one end of the supporting plate 130 is connected to the second surface 124, one end of the bottom plate 140 is connected to the second surface 124, and the other end of the supporting plate 130 is connected to the other end of the bottom plate 140. That is, the inclined plate 120, the bottom plate 140 and the support plate 130 form a triangular structure, and the triangular structure has better stability and strength rigidity, thereby being beneficial to improving the rigidity and strength of the lower side sill structure 100. Since the lower side beam structure 100 has a plate-like structure, it is lighter than a conventional rectangular cross-section beam, which is advantageous for reducing the self weight of the lower side beam structure 100. In addition, in the vehicle compartment provided in this embodiment, the lower side beam structure 100 is riveted to the bolster 300 and the cross beam 200 of the vehicle compartment, and the assembly process of the three is modular assembly, which is simple and convenient. The cover plate 310 of the sleeper beam 300 is attached to the bottom plate 140, and a triangular structure formed by the inclined plate 120, the bottom plate 140 and the support plate 130 has a better supporting effect at the sleeper beam 300, so that the overall strength and rigidity of the carriage can be improved, heavier goods can be borne, and the carrying capacity can be improved.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

It should be noted that the "first convex body" may be "a part of the first mounting component", that is, the "first convex body" is integrally formed with "the other part of the first mounting component"; or a separate member which can be separated from the other parts of the first mounting part, namely the first convex body can be manufactured separately and then combined with the other parts of the first mounting part into a whole.

Equivalently, the "body" and the "certain part" can be parts of the corresponding "component", i.e., the "body" and the "certain part" are integrally manufactured with other parts of the "component"; the "part" can be made separately from the "other part" and then combined with the "other part" into a whole. The expressions "a certain body" and "a certain part" in the present application are only one example, and are not intended to limit the scope of the present application for reading convenience, and the technical solutions equivalent to the present application should be understood as being included in the above features and having the same functions.

It should be noted that the "first mounting part" may be one of the parts of the "mounting unit" module, that is, the "mounting unit is modularly assembled with the" other members of the mounting unit "; or may be relatively independent from the "other components of the mounting unit", separable, i.e. modularly assembled with the "other components of the mounting unit" in the present device.

Equivalently, the components included in the unit, the assembly, the mechanism and the device can be flexibly combined, and can be produced in a modularized mode according to actual needs, so that the modularized assembly is convenient. The division of the above-mentioned components in the present application is only one example, which is convenient for reading and is not a limitation to the protection scope of the present application, and the same functions as the above-mentioned components should be understood as equivalent technical solutions in the present application.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims (10)

1. An underside beam structure, comprising:

the inclined plate comprises a first surface and a second surface which are oppositely arranged, the first surface is used for being arranged towards the interior of a carriage, and the second surface is used for being arranged back to the interior of the carriage; the vertical plate is connected to one end of the inclined plate, and an obtuse angle is formed between the plate surface of the vertical plate and the first surface; one end of the supporting plate is connected to the second face, one end of the bottom plate is connected to the second face, and the other end of the supporting plate is connected with the other end of the bottom plate.

2. The lower side rail structure according to claim 1, wherein the lower side rail structure is an aluminum extruded structure.

3. The lower side sill structure of claim 1 or 2, wherein the inclined plates include an upper inclined plate and a lower inclined plate connected to each other, one end of the upper inclined plate is connected to the vertical plate, the other end of the upper inclined plate is connected to the lower inclined plate, the support plate and the bottom plate are both connected to the lower inclined plate, the thickness of the support plate and the thickness of the bottom plate are both smaller than that of the upper inclined plate, and the thickness of the lower inclined plate is smaller than that of the upper inclined plate.

4. The underside beam structure of claim 3, wherein the thickness of the support plate and the thickness of the base plate are each less than the thickness of the riser plate.

5. The lower side sill structure of claim 3, wherein the plate surface of the lower inclined plate along the direction from the lower inclined plate to the upper inclined plate forms an acute angle with the plate surface of the bottom plate, and the included angle formed at the junction of the bottom plate and the support plate is an acute angle.

6. A carriage comprising a cross member, a bolster and the lower side member structure according to any one of claims 1 to 5, wherein the bolster and the cross member are both disposed along a width direction of the carriage, the lower side member structure is disposed along a length direction of the carriage, an end surface of the bolster is connected to a lower inclined plate of the lower side member structure, and the cross member is disposed at a joint of an upper inclined plate and a vertical plate of the lower side member structure.

7. The carriage as claimed in claim 6, wherein the plate surface of the bottom plate is parallel to the bottom surface of the carriage, and the plate surface of the vertical plate is perpendicular to the plate surface of the bottom plate.

8. A vehicle compartment according to claim 6, wherein the lower side frame structures are connected at both ends thereof in the longitudinal direction thereof to the body bolsters, respectively, and a plurality of the cross members are connected to the lower side frame structures, respectively, along the longitudinal direction of the lower side frame structures, and are located between the body bolsters.

9. A carriage as claimed in claim 6, characterized in that the bolster is connected to the lower sloping plate and the cross member is connected to the connection of the upper sloping plate and the vertical plate.

10. A railway wagon, comprising a wagon as claimed in any one of claims 6 to 9.

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