JP7581140B2 - Railway vehicle body frame and manufacturing method thereof - Google Patents

Description

The present invention relates to a railroad car body frame and a manufacturing method thereof.

The structure of a railway car is a box-like (hexahedral) body made up of an underframe that forms the floor surface, side structures erected at both ends of the underframe in the width direction, end structures erected at both ends of the underframe in the longitudinal direction, and a roof structure placed on the upper ends of the side structures and end structures. Each of these structures is made up of a hollow extruded material formed by integrally extruding two opposing face plates and a connecting plate that connects these face plates. The end of the railway car body near the end structure has a center beam to which a coupler is connected.
Patent Document 1 discloses an example in which a center beam at the end of a railway car body structure is constructed using an extruded member in which an underframe and a center beam are integrally extruded.

Japanese Patent Application Publication No. 9-254786

Patent Document 1 describes a structure that uses extruded shapes in which the underframe and center beam are extruded together as a single unit to form the underframe and center beam of a railway car body structure. In this structure, the extruded shapes in which the underframe and center beam are extruded together as a single unit are used from the end of the railway car body structure to the center of the bolster, due to the range in which the center beam is used. Between the bolsters of the railway car body structure, extruded shapes of the same height are combined to form the underframe.

However, in Patent Document 1, it is necessary to use different extrusions in the area from the end of the railway car body to the center of the bolster and in the area between the bolsters of the railway car body. Also, in consideration of the reliability and ride comfort of the railway car body, it is preferable to construct an underframe structure with higher rigidity between the bolsters of the railway car body, compared to an underframe constructed by combining extrusions of the same height.

The object of the present invention is to provide a railway vehicle body structure having a highly rigid underframe structure in which the end portions, bolster portion, and center portion of the underframe can be constructed using the same extruded material, and a manufacturing method thereof.

In order to solve the above problems, one of the representative underframes of the railway car body of the present invention is characterized in that the central part of the underframe is composed of a first underframe structure, and the first underframe structure is composed of an extruded member having a face plate parallel to the floor surface, and the first U-shaped part in the center in the width direction is characterized in that it is composed of a first U-shaped floor surface part having a floor surface shape that is a first floor surface that contacts the lower part of the first space, and two first U-shaped side surface parts on the left and right that are perpendicular to it and have a first side shape consisting of part A that contacts the first space and part B that extends continuously downward and in parallel and contacts the first U-shaped floor surface part, and the two left and right first side surface parts A are provided with two joint parts 17A and 17B that are spaced apart by the same length as the height thickness of the first U-shaped floor surface part and protrude into the first space.

According to the present invention, it is possible to provide a railway car body having an underframe structure in which the underframe ends, the bolster portion and the central portion of the underframe can be constructed using the same extruded profile, and thus it is possible to provide a highly rigid underframe structure and a manufacturing method thereof.
Problems, configurations and effects other than those described above will become apparent from the description of the following embodiments.

FIG. 1 is a perspective view of a railway vehicle body structure. FIG. 2A is a cross-sectional view of first frame structure 201 at frame center portion 103 as shown in FIG. 1A-A. FIG. 2B is an enlarged view of the center portion of the first frame structure 201 in the Y direction. FIG. 3A is a cross-sectional view of the second frame structure 202 at the frame end 101 in FIG. 1B-B; FIG. 3B is an enlarged view of the center of the second frame structure 202 in the Y direction. FIG. 4A is a cross-sectional view of the third frame structure 203 in the bolster portion 102 taken along the line CC of FIG. FIG. 4B is a cross-sectional view of the third underframe structure 203 to which the bolster 51 is fastened via a curtain rail portion 59 .

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the present invention is not limited to this embodiment. In addition, in the description of the drawings, the same parts are denoted by the same reference numerals.

In this disclosure, directions may be indicated using the X-axis, Y-axis, and Z-axis indicated on the drawings. Here, the longitudinal (rail) direction of the railway vehicle body structure is the X-direction, the width (sleeper) direction of the railway vehicle body structure is the Y-direction, and the height direction of the railway vehicle body structure is the Z-direction. Hereinafter, these may simply be referred to as the X-direction, Y-direction, and Z-direction.

In this disclosure, unless otherwise specified, "floor" means a plane parallel to the XY plane, "side" means a plane parallel to the XZ plane, and "cross section" means a cross section in a plane parallel to the YZ plane. Additionally, "upper" means the positive direction of the Z axis, "lower" means the negative direction of the Z axis, "right" means the positive direction of the Y axis, and "left" means the negative direction of the Y axis.
In this disclosure, unless otherwise specified, the cross-sectional shape of the frame structure in the YZ plane is bilaterally symmetrical, and descriptions or symbols for one side may be simplified or omitted for the other side.

Figure 1 is a perspective view of a railway car body structure. The railway car body structure 1 is a hexahedron composed of an underframe 10 forming the floor surface, side structures 20 erected at both ends of the underframe 10 in the Y direction, end structures 40 erected at both ends of the underframe 10 in the X direction, and a roof structure 30 placed on the upper ends of the side structures 20 and the end structures 40. Openings such as boarding and alighting doors 22 and windows 23 for passengers to board and alight from are provided at both ends of the side structures 20 in the X direction. The end structures 40 are provided with passageways 42 for passengers to pass between adjacent cars.

At the end of the frame 101, the frame 10 forms a center beam on which a coupler is installed. At the bolster section 102, the frame 10 forms a bolster. The center of the railway vehicle body structure 1 between the bolster sections 102 is defined as the center section 103 of the frame.

[First frame structure]
Fig. 2A is a cross-sectional view of the first underframe structure 201 at the underframe center portion 103 in Fig. 1A-A. Fig. 2B is an enlarged view of the center portion in the Y direction of the first underframe structure 201. The first underframe structure 201 is sandwiched between side beams 5 connected to the side structures 20. The first underframe structure 201 between the side beams 5 is composed of extrusions 11, 12, and 13. In Fig. 2A, the extrusions 11, 12, and 13 are connected in this order from the side beams 5 toward the center of the first underframe structure 201.

The upper and lower floor surfaces located on the center side of the frame of the extruded profile 13 are positioned lower than the upper and lower floor surfaces located on the side connected to the extruded profile 12, forming a first U-shaped section 300 with a U-shaped cross section that is symmetrical on the left and right.

In this embodiment, the first U-shaped floor surface portion 303 is a shaped portion having a floor surface shape of a first floor surface 302 that contacts the lower side of the first space 301, which is an open space surrounded by the first U-shaped portion 300. The first U-shaped side surface portion 305 is a shaped portion having a side surface shape of a first side surface 304 that is perpendicular to the first floor surface 302 and contacts the first space 301 (the "first side surface 304A portion") and a side surface that extends continuously downward in parallel and contacts the first U-shaped floor surface portion 303 (the "first side surface 304B portion"). The first U-shaped portion 300 is composed of the first U-shaped floor surface portion 303 and two first U-shaped side surface portions 305 on the left and right.

The first side surface 304A is provided with joints 17A and 17B that are spaced apart at a distance equal to the height thickness of the first U-shaped floor surface portion 303 and protrude into the first space 301. In this embodiment, joint 17A is positioned above joint 17B.

<Action and Effects>
The first underframe structure 201 of the underframe center portion 103 is constituted by the above-mentioned underframe structure. The first underframe structure 201 has a structure including the first U-shaped portion 300, and therefore has a large height as an underframe structure. This increases the rigidity (bending rigidity) of the underframe compared to a case in which the extruded shapes 11, 12, and 13 are all constituted to have the same height, and makes it possible to reduce the amount of deformation when a pressure load is applied to the entire surface of the underframe.

Furthermore, by joining a new plate material at the height of the joint portion 17A between the left and right first U-shaped side surface portions 305, a closed space is formed between the plate material and the first U-shaped floor surface portion 303. This closed space can further improve the rigidity of the frame.

In this embodiment, a total of six pieces of three types of extruded shapes 11, 12, and 13 are used to construct the frame, but extruded shapes 11 and 12 can also be a single extruded shape, and the frame can be constructed using a number of shapes that are not limited to three and six.

[Second frame structure]
1B-B of the second frame structure 202 at the frame end 101. Fig. 3B is an enlarged view of the center in the Y direction of the second frame structure 202. Components that are the same as or equivalent to those in the first frame structure described above are given the same reference numerals, and their description will be simplified or omitted.

In this embodiment, the second frame structure 202 forms a second U-shaped portion 400 that is open downward and has a symmetrical U-shape in cross section at the center in the Y direction.

In this embodiment, the second U-shaped floor surface portion 403 is a shaped portion having a floor surface shape of a second floor surface 402 that contacts the upper part of the second space 401, which is an open space surrounded by the second U-shaped portion 400. The second U-shaped side surface portion 405 is a shaped portion having a side surface shape of a second side surface 404 that is perpendicular to the second floor surface 402 and contacts the second space 401 (the "second side surface 404A portion") and a side surface that extends continuously upward in parallel and contacts the second U-shaped floor surface portion 403 (the "second side surface 404B portion"). The second U-shaped portion 400 is composed of the second U-shaped floor surface portion 403 and two second U-shaped side surface portions 405 on the left and right.

The second side surface 404B is provided with joints 17A and 17B that are spaced apart at a distance equal to the height thickness of the second U-shaped floor surface portion 403 and protrude into the second U-shaped floor surface portion 403. In this embodiment, joint 17A is positioned above joint 17B.

<Production Method>
The second frame structure 202 can be formed by cutting the first U-shaped floor surface shape portion 303 of the first frame structure 201 from the two first U-shaped side surface shape portions 305 on the left and right, moving it upward, and joining it to the joint portions 17A and 17B provided in the first side surface 304A portion.

In the first frame structure 201 and the second frame structure 202 manufactured in this manner, it is clear that the first U-shaped floor surface shape portion 303 and the second U-shaped floor surface shape portion 403, and the first U-shaped side surface shape portion 305 and the second U-shaped side surface shape portion 405 are the same components.

<Action and Effects>
The second underframe structure 202 has a second U-shaped portion 400, and a coupler 50 is provided in the second space 401, so that the second underframe structure 202 can be used as a center beam. With the above-mentioned configuration, the underframe 10 of the underframe end portion 101 on which the coupler 50 is provided can be configured.

Furthermore, by adopting the above-mentioned manufacturing method, it is possible to manufacture the second frame structure of the end portion 101 of the frame using the same extrusion material as the first frame structure 201 of the center portion 103 of the frame, which has the effect of improving manufacturing efficiency and reducing costs.

[Third frame structure]
1C-C of the third frame structure 203 in the bolster section 102, in which the bolster 51 is fastened via a screw seat 57. FIG. 4B is a cross-sectional view of the third frame structure 203 with the bolster 51 fastened via a curtain rail section 59.

The third frame structure 203 is characterized in that the Z-direction height of the shaped panel 19A of the floor surface at the lower part of the two first U-shaped side surface portions 305 on the left and right sides in the frame structure 201 of FIG. 1 is set to the same height as the shaped panel 19B of the floor surface at the lower part of the side beam 5. Components that are the same or equivalent to those in the first frame structure described above are given the same reference numerals, and their description will be simplified or omitted.

<Fastening the bolster using a screw seat>
4A shows a configuration in which the shaped face plates 19A and 19B are cut out and the shaped face plates provided with screw seats 57 are joined to the first U-shaped side surface shape portion 305 and the side beam 5 by means including welding. A structure including a bolster 51 can be fastened to the lower part of the underframe 10 by bolts 56 via the screw seats 57.

<Fastening of the bolster by the curtain rail>
4B shows a configuration in which a curtain rail portion (C-shaped channel portion) 59 into which the head of a bolt 56 is inserted is integrally extruded into the lower portion of the shaped face plates 19A and 19B. The bolt head can be inserted into the curtain rail portion 59 to cause the bolt 56 to protrude below the underframe 10, and the structure including the bolster 51 can be fastened to the lower portion of the underframe 10 with a nut 58.

<Action and Effects>
By configuring the third underframe structure 203, the underframe 10 of the bolster portion 102 in which the bolster 51 is provided can be configured.

In this way, this embodiment makes it possible to construct the underframe 10 of the railway vehicle structure 1, including the underframe end portion 101, the bolster portion 102, and the underframe central portion 103, using the same extrusion material as the first underframe structure 201 of the underframe central portion 103, which has the effect of improving manufacturing efficiency and reducing costs.

Although the embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications are possible without departing from the gist of the present invention.
For example, the embodiment shown in Fig. 4 shows a configuration example in which the bolster 51 is installed under the underframe 10, but the underframe 10 may be cut at the bolster portion 102, and the bolster 51 may be installed by aligning the floor surface below the bolster 51 with the upper position of the floor surface of the underframe 10. In this case, the shaped member face plates 19A and 19B do not necessarily have to be provided at the same height.

1 ... railway vehicle body structure, 5 ... side beam, 10 ... underframe, 11, 12, 13 ... extruded shape member 17A, 17B ... joint portion, 19A, 19B ... shape member face plate, 20 ... side structure 22 ... boarding and alighting door, 23 ... window, 30 ... roof structure, 40 ... gable structure, 42 ... through passage opening 50 ... coupler, 51 ... bolster, 56 ... bolt, 57 ... screw seat, 58 ... nut 59 ... curtain rail portion (C-shaped channel portion), 101 ... underframe end, 102 ... bolster portion 103 ... underframe center portion, 201 ... first underframe structure, 202 ... second underframe structure,
203...Third frame structure, 300...First U-shaped portion, 301...First space 302...First floor surface, 303...First U-shaped floor surface portion, 304...First side surface 305...First U-shaped side surface portion, 400...Second U-shaped portion, 401...Second space 402...Second floor surface, 403...Second U-shaped floor surface portion, 404...Second side surface 405...Second U-shaped side surface portion, X, Y, Z...each direction

Claims (5)

A frame for a railway vehicle body structure, comprising:
The central portion of the frame is
It is made up of extruded shapes with face plates parallel to the floor surface.
A shaped portion having a U-shaped cross section in the center in the width direction (hereinafter referred to as a "first U-shaped portion"),
The first U-shaped portion is characterized by comprising a portion (hereinafter referred to as the "first U-shaped floor portion") having a floor surface (hereinafter referred to as the "first floor") that is in contact with the bottom of an open space (hereinafter referred to as the "first space") surrounded by the first U-shaped portion, and two left and right portions (hereinafter referred to as the "first U-shaped side portion") having a side surface (hereinafter referred to as the "first side") that is perpendicular to the first floor surface and in contact with the first space (hereinafter referred to as the "first side A portion") and a portion (hereinafter referred to as the "first side B portion") that extends continuously downward and in parallel and in contact with the first U-shaped floor portion;
The two left and right first side surface A portions are provided with two joint portions spaced apart by the same length as the thickness in the height direction of the first U-shaped floor surface portion and protruding into the first space.
The first frame structure is characterized in that
The end of the frame of the frame is
It is made up of extruded shapes with face plates parallel to the floor surface.
A shaped portion having a U-shaped cross section in the center in the width direction (hereinafter referred to as the "second U-shaped portion"),
The second U-shaped portion is characterized by comprising a shaped portion (hereinafter referred to as the "second U-shaped floor portion") having a floor surface (hereinafter referred to as the "second floor") that is in contact with the upper part of an open space (hereinafter referred to as the "second space") surrounded by the second U-shaped portion as a floor surface shape, and two shaped portions (hereinafter referred to as the "second U-shaped side surface portion") on the left and right sides having a side surface (hereinafter referred to as the "second side surface") that is perpendicular to the second floor surface and is in contact with the second space (the "second side surface A portion") and a portion (hereinafter referred to as the "second side surface B portion") that extends continuously upward and in parallel and is in contact with the second U-shaped floor portion;
The two left and right second side surface B portions are provided with two joint portions spaced apart by the same length as the thickness in the height direction of the second U-shaped floor surface portion and protruding from the second U-shaped floor surface portion.
The second underframe structure comprises a railroad car body structure. The underframe of the railway car body structure according to claim 1 ,
The bolster portion of the underframe is
In the first underframe structure, the height of the floor surface of the lower part of the side beam and the height of the floor surfaces of the lower parts of the two first U-shaped side surface portions on the left and right are at the same position.
The third underframe structure is characterized in that: The underframe of the railway car body structure according to claim 2 ,
In the third underframe structure, a surface plate of a floor surface of a lower part of the side beam and a surface plate of a floor surface of a lower part of the two first U-shaped side surface portions on the left and right have a screw seat,
A structure including a bolster is fastened to a lower portion of the third underframe structure via the screw seat using a bolt.
A railway vehicle structure underframe characterized by: The underframe of the railway car body structure according to claim 2 ,
In the third underframe structure, a curtain rail portion capable of containing a bolt head is configured below a face plate of a floor surface of a lower portion of the side beam and a face plate of a lower portion of a floor surface of the two first U-shaped side surface portions on the left and right,
A structure including a bolster is fastened to a lower portion of the third underframe structure via the curtain rail portion using a bolt.
A railway vehicle structure underframe characterized by: The method for manufacturing an underframe for a railway car body structure according to claim 1 ,
cutting the first U-shaped floor surface shape portion of the first frame structure from the first side surface B portions of the two first U-shaped side surface shape portions on the left and right, moving the first U-shaped floor surface shape portion upward, and then joining the first U-shaped floor surface shape portion to the joint portion provided on the first side surface A portion to manufacture the second frame structure;
A method for manufacturing an underframe for a railway vehicle body, comprising the steps of:

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