JP6909019B2 - Railroad vehicle structure - Google Patents

Description

The present invention relates to a railroad vehicle structure.

A double-skin structure is known as a structure of an outer panel used for a railway vehicle structure. An outer panel having a double-skin structure is generally composed of an outer face plate arranged on the outside of the vehicle, an inner side plate arranged on the inside of the vehicle, and a middle plate forming a truss structure between the outer face plate and the inner side plate. (See, for example, Patent Document 1).

Japanese Unexamined Patent Publication No. 2006-82676 Special Table No. 11-500681

In the double-skin structure, the same cross-sectional structure is continuous in the longitudinal direction of the vehicle by the outer face plate, the inner side plate, and the middle plate. Therefore, there is a problem that it is difficult to partially reinforce the place where the load is relatively easily concentrated, such as the opening such as the door and the window or the part located on the carriage, by the double skin structure itself. Another problem with the double-skin structure is that one-sided access to the joint is difficult. When manufacturing an outer panel having a double-skin structure, it is necessary to reverse the direction of the face plate between the step of joining the middle plate to the outer face plate and the step of joining the middle plate to the inner side surface side. For this reason, it is a process problem that it takes time to turn over the large face plate.

From the viewpoint of partially strengthening the outer panel and realizing one-sided access for joining the outer panel, a bone member is joined to the inside of the face plate, for example, as in the planar structure disclosed in Patent Document 2. The single skin structure is considered to be superior. On the other hand, for example, a side structure of a railroad vehicle structure is formed by joining face plates of various parts such as a waist panel, a curtain panel, and a blow-up panel to each other. Therefore, the side structure of the railroad vehicle structure is formed by joining along the abutting portion of the end portions of the face plates, and further joining the bone members inside the joint between the face plates. In such a configuration, in order to ensure the strength of the joint, it is necessary to sufficiently improve the strength of the joint provided along the abutting portion between the face plates. For example, even if a crack is generated at a joint due to the running of a railroad vehicle, a device is required to prevent the crack from easily expanding along the joint.

The present invention has been made to solve the above problems, and to provide a railway vehicle structure capable of sufficiently improving the strength of a joint even when an outer panel having a single skin structure is used. The purpose.

The railroad vehicle structure according to one aspect of the present invention is a railroad vehicle structure including an outer panel composed of a joint body formed by joining face plates to each other and a bone member joined to the inside of the joint body. The face plate has a flat surface portion constituting the outer shell of the vehicle and a protruding portion extending inside the flat surface portion, and the bone member has a main body portion that intersects the protruding portion and overlaps the protruding portion, and a main body. It has a flange portion that projects from the portion and overlaps the inside of the flat surface portion, and the face plates are joined by a first joint portion formed along the abutting portion of the face plates. It is joined by a second joint formed in the overlapped portion between the butt portion of the face plates including the first joint portion and the flange portion.

In this railway vehicle structure, the flange portion of the bone member is overlapped with the first joint portion for joining the face plates to each other, and the second joint portion for joining the face plate and the bone member is provided at the overlapped portion. .. With such a configuration, even if a crack is generated in the first joint portion, the expansion of the crack is suppressed by the flange portion joined to the face plate by the second welded portion. Therefore, even when an outer panel having a single skin structure is used, the strength of the joint can be sufficiently improved.

Further, when viewed from the thickness direction of the outer panel, the joint line of the first joint portion and the joint line of the second joint portion may intersect. In this case, the anisotropy of the joint can be eliminated, and the strength of the joint can be further sufficiently secured.

Further, the second joint portion may be provided in a spot shape so as to straddle the first joint portion. In this case, since the first joint portion and the second joint portion are separated from each other, it is possible to prevent the cracks generated in the first joint portion from propagating to the second joint portion.

Further, the joint line of the first joint portion and the joint line of the second joint portion may not intersect when viewed from the thickness direction of the outer panel. In this case, since the first joint portion and the second joint portion are separated from each other, it is possible to prevent the cracks generated in the first joint portion from propagating to the second joint portion.

Further, the strength of the material of the bone member may be equal to or higher than the strength of the material of the face plate. In this case, partial strengthening of the outer panel can be easily realized by arranging the bone members.

Further, both the first joint portion and the second joint portion may be friction stir welding joints. In this case, the first joint portion and the second joint portion can be formed while suppressing heat input. Therefore, deformation of the face plate and the bone member can be suppressed.

According to the present invention, the strength of the joint can be sufficiently improved even when an outer panel having a single skin structure is used.

It is a schematic perspective view which shows one Embodiment of a railroad vehicle structure. It is a perspective view which shows an example of the outer panel. It is a figure which looked at the outer panel shown in FIG. 2 from the inside of a vehicle. It is a figure which shows the modification of the outer panel. It is a figure which shows another modification of the outer panel.

Hereinafter, preferred embodiments of the railway vehicle structure according to one aspect of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic perspective view showing an embodiment of a railway vehicle structure. As shown in the figure, the railroad vehicle structure 1 includes a floor structure 2, a side structure 3, a roof structure 4, and a wife structure 5. By joining each of these structures to each other, the railroad vehicle structure 1 has a box shape having a space for accommodating passengers inside.

The floor structure 2 is arranged at the bottom of the railway vehicle structure 1 as a structure constituting the floor of the vehicle. A pair of bogies (not shown) that support the railroad vehicle structure 1 are installed below the floor structure 2. The side structure 3 and the wife structure 5 are erected so as to surround the left and right edges and the front and rear edges of the floor structure 2 as structures constituting the side portions of the vehicle.

The side structure 3 is provided with a plurality of door portions 6 at equal intervals for passengers to get on and off. Further, windows 7 are provided between the door portions 6 and 6 and both ends of the side structure 3. The side structure 3 is composed of an outer panel 11 (see FIG. 2) that forms each part such as a waist panel, a blow-up panel, a curtain panel, and a door upper panel.

The waist panel is a panel located between the window portion 7 and the floor structure 2, and the blow-in panel is a panel located between the door portion 6 and the window portion 7 and between the window portion and the wife structure 5. Is. The curtain panel is a panel located between the window portion 7 and the roof structure 4, and the door upper panel is a panel located between the door portion 6 and the roof structure 4.

The wife structure 5 is provided with an entrance / exit 8 for passengers to move between vehicles. The roof structure 4 is arranged so as to cover the space above the structure of the railway vehicle as a structure constituting the roof portion of the vehicle. An air conditioner and a pantograph (not shown) for adjusting the temperature inside the vehicle are installed on the roof structure 4 of the vehicle at the upper part.

Next, the outer panel 11 constituting the side structure 3 described above will be described in more detail.

FIG. 2 is a perspective view showing an example of the outer panel. As shown in the figure, the outer panel 11 has a single-skin structure composed of a joint body 13 formed by joining the face plates 12 and 12 to each other and a bone member 14 joined to the inside of the joint body 13. Have. The face plate 12 is a plate material made of an aluminum alloy such as 6N01. The thickness of the face plate 12 is, for example, about several millimeters. The face plate 12 has a flat surface portion 15 that constitutes the outer shell of the vehicle, and a plurality of projecting portions 16 that extend linearly in the longitudinal direction of the vehicle inside the flat surface portion 15.

In the present embodiment, the protrusions 16 are arranged at predetermined intervals in the height direction of the vehicle. The protruding portion 16 is integrally formed with the flat surface portion 15 by, for example, extrusion molding. The protruding portion 16 has a pair of side surface portions 17 and 17 facing each other and a top surface portion 18 connecting the tips of the side surface portions 17 and 17 to each other, and forms a hollow portion S having a rectangular cross section with the face plate 12. ing. A middle plate may be provided in the hollow portion S, and the protruding portion 16 may have a truss structure.

The adjacent face plates 12 and 12 are firmly joined to each other by a first joint portion W1 formed continuously along the abutting portion P1 between the end portions of the flat surface portions 15 and 15, forming a joint body 13. There is. The first joint portion W1 is, for example, a friction stir welding joint formed by friction stir welding. Friction stir welding is a solid-state bonding method in which a rotary tool is rotated and pushed into a material such as a metal material, and the base materials softened by frictional heat are integrated by plastic flow. Friction stir welding has a smaller amount of heat input to the base metal than melt welding such as arc welding and laser welding, so it is possible to obtain high-quality joints and is suitable for joining aluminum alloys with a low melting point. ing.

The bone member 14 is a pillar material made of a material having higher strength than the face plate 12. Examples of the material of the bone member 14 include a high-strength aluminum alloy such as 7N01. The bone member 14 may be made of the same material as the face plate 12. The thickness of the bone member 14 is, for example, about several millimeters, similar to the face plate 12.

The bone member 14 is a pair of side surface portions 22, 22 that project from both sides of the plate-shaped main body portion 21 and the main body portion 21 at a pitch slightly wider than the width of the top surface portion 18 at substantially right angles to the main body portion 21, respectively. And a pair of flange portions 23, 23 that project from the tips of the pair of side surface portions 22, 22 at substantially right angles to the side surface portions 22, 22, respectively. In the bone member 14, only the main body 21 exists in a plate shape in the portion where the flange portion 23 is not provided, and in the portion where the flange portion 23 is provided, the main body portion 21, the side surface portion 22, and the flange portion 23 are used. It has a hat-shaped cross section.

In this embodiment, the bone members 14 are arranged at predetermined intervals in the longitudinal direction of the vehicle. The plate-shaped main body portion 21 extends in the height direction of the vehicle so as to be substantially orthogonal to the top surface portion 18 of the protrusion 16 on the face plate 12, and is arranged so as to overlap the top surface portion 18. The side surface portion 22 has a rectangular shape. The side surface portion 22 is located between the projecting portions 16 and 16 of the face plate 12, and extends from the main body portion 21 toward the inside of the face plate 12.

Further, the flange portion 23 has a rectangular shape and is overlapped with the inside of the flat surface portion 15 at a position between the protruding portions 16 and 16 of the face plate 12. A part of the flange portion 23 is overlapped with the butt portion P1 of the face plates 12 and 12 including the first joint portion W1. The face plate 12 and the bone member 14 are firmly joined to each other by a second joint portion W2 formed in a spot shape on the overlapping portion P2 of the flange portion 23 and the face plate 12.

The second joint portion W2 is, like the first joint portion W1, a friction stir welding joint formed by, for example, a friction stir welding. When the second joint portion W2 is formed by friction stir welding, the width of the flange portion 23 (length overhanging from the side surface portion 22) is preferably equal to or larger than the diameter of the rotary tool used in friction stir welding. By securing a sufficient width of the flange portion 23, it is possible to secure a moment applied from the tip end side to the proximal end side of the flange portion 23, and it is possible to join in a state where the gap between materials is reduced.

In the present embodiment, as shown in FIG. 3, the joint line L1 of the first joint portion W1 and the joint line L2 of the second joint portion W2 are orthogonal to each other when viewed from the thickness direction of the outer panel 11. ing. Specifically, the joint line L1 of the first joint portion W1 extends in the longitudinal direction of the vehicle along the butt portion P1 of the face plates 12 and 12, and the joint line L2 of the second joint portion W2 is a flange. It extends in the height direction of the vehicle so as to pass through the central position of the portion 23.

In the flange portion 23 overlapped with the abutting portion P1 of the face plates 12 and 12, the first joint portion is between the spot-shaped second joint portions W2 and W2 when viewed from the thickness direction of the outer plate panel 11. W1 is postponed. That is, the second joint portion W2 is provided in a spot shape along the joint line L2 so as to straddle the first joint portion W1. Therefore, in the present embodiment, the joint line L1 of the first joint portion W1 and the joint line L2 of the second joint portion W2 are orthogonal to each other, but the first joint portion W1 and the second joint portion W2 Are separated from each other.

As described above, in the railroad vehicle structure 1, the flange portion 23 of the bone member 14 is superposed on the first joint portion W1 for joining the face plates 12 and 12, and the face plate 12 and the bone member are superposed on the superposed portion P2. A second joint portion W2 for joining with 14 is provided. With such a configuration, even if a crack occurs in the first joint portion W1, the expansion of the crack is suppressed by the flange portion 23 joined to the face plate 12 by the second joint portion W2. Therefore, even when the outer panel 11 having a single skin structure is used, the strength of the joint portion can be sufficiently improved. Further, it is possible to enjoy the effects peculiar to the single skin structure such as the partial strengthening of the outer panel 11 by the bone member 14 and the realization of one-sided access for joining the outer panel 11.

In the present embodiment, the joint line L1 of the first joint portion W1 and the joint line L2 of the second joint portion W2 are orthogonal to each other when viewed from the thickness direction of the outer panel 11. As a result, the anisotropy of the joint can be eliminated, and the strength of the first joint portion W1 and the second joint portion W2 can be further sufficiently secured. Further, in the present embodiment, the second joint portion W2 is provided in a spot shape so as to straddle the first joint portion W1. As a result, the first joint portion W1 and the second joint portion W2 are separated from each other, so that it is possible to prevent cracks generated in the first joint portion W1 from propagating to the second joint portion W2.

In the present embodiment, the strength of the material of the bone member 14 is equal to or higher than the strength of the material of the face plate 12. Thereby, the partial strengthening of the outer panel 11 can be easily realized by the arrangement of the bone member 14. Further, in the present embodiment, both the first joint portion W1 and the second joint portion W2 are friction stir welding joints. As a result, the first joint portion W1 and the second joint portion W2 can be formed while suppressing heat input. Therefore, the deformation of the face plate 12 and the bone member 14 can be suppressed. Further, even when joining different materials between the face plate 12 and the bone member 14 as in the present embodiment, it is possible to perform joining in which the formation of intermetallic compounds is suppressed.

The present invention is not limited to the above embodiment. For example, in the above embodiment, the second joint W2 is provided in a spot shape along the joint line L2, but as shown in FIG. 4, the second joint W2 is continuous along the joint line L2. It may be provided in. Even with such a configuration, since the anisotropy of the joint can be eliminated, the strength of the first joint portion W1 and the second joint portion W2 can be sufficiently ensured.

Further, as shown in FIG. 5, when viewed from the thickness direction of the outer panel 11, the joint line L1 of the first joint portion W1 and the joint line L2 of the second joint portion W2 do not intersect with each other. May be good. In the example of FIG. 5, a joint line L2 is provided on one side of the joint line L1 of the first joint portion W1 (lower side in the height direction of the vehicle) in parallel with the joint line L1, and the first joint line L2 is provided along the joint line L2. The joint portion W2 of 2 is provided in a spot shape. Even with such a configuration, since the first joint portion W1 and the second joint portion W2 are separated from each other, the cracks generated in the first joint portion W1 propagate to the second joint portion W2. Can be suppressed.

In the above embodiment, the outer panel 11 applied to the side structure 3 is illustrated, but the outer panel 11 may be applied to the roof structure 4. Further, the bone member 14 is not limited to the form in which the flange portions 23 and 23 are provided on both sides of the main body portion 21, and may be in the form in which the flange portions 23 are provided on only one side of the main body portion 21. The first joint portion W1 and the second joint portion W2 do not necessarily have to be friction stir welding, and may be joint portions formed by other methods such as laser welding and arc welding.

1 ... Railway vehicle structure, 11 ... Outer panel, 12 ... Face plate, 13 ... Joint, 14 ... Bone member. 15 ... Flat surface part, 16 ... Protruding part, 21 ... Main body part, 23 ... Flange part, P1 ... Butt part, P2 ... Overlapping part, L1, L2 ... Joint line, W1 ... First joint part, W2 ... Second Joint.

Claims (4)

A railway vehicle structure including an outer panel composed of a joint body formed by joining face plates to each other and a bone member joined to the inside of the joint body.
The face plate has a flat surface portion constituting the outer shell of the vehicle and a protruding portion extending inside the flat surface portion.
The bone member has a main body portion that intersects the protruding portion and overlaps the protruding portion, and a flange portion that projects from the main body portion and overlaps the inside of the flat surface portion.
The face plates are joined by a first joint formed along the abutting portion of the face plates.
The face plate and the bone member are joined by a second joint formed in an overlapping portion between the flat surface portion including the first joint portion and the flange portion.
A railway vehicle structure in which the joint line of the first joint portion and the joint line of the second joint portion do not intersect when viewed from the thickness direction of the outer panel. A railway vehicle structure including an outer panel composed of a joint body formed by joining face plates to each other and a bone member joined to the inside of the joint body.
The face plate has a flat surface portion constituting the outer shell of the vehicle and a protruding portion extending inside the flat surface portion.
The bone member has a main body portion that intersects the protruding portion and overlaps the protruding portion, and a flange portion that projects from the main body portion and overlaps the inside of the flat surface portion.
The face plates are joined by a first joint formed along the abutting portion of the face plates.
The face plate and the bone member are joined by a second joint formed in an overlapping portion between the flat surface portion including the first joint portion and the flange portion.
When viewed from the thickness direction of the outer panel, the joint line of the first joint portion and the joint line of the second joint portion intersect with each other.
The second joint is a railroad vehicle structure provided in a spot shape so as to straddle the first joint. The railway vehicle structure according to claim 1 or 2, wherein the strength of the material of the bone member is equal to or higher than the strength of the material of the face plate. The railway vehicle structure according to any one of claims 1 to 3, wherein both the first joint and the second joint are friction stir welds.

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