JPH1159413A - Vehicular body of rolling stock - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular body which is lightweight and strainless, in the vehicular body made up of hollow shaped members. SOLUTION: In a vehicular body made up of hollow extrusion members, in the inside of the hollow shaped members, a build up welding 32 is made to the surface plate 21 having a narrower space out of two ribs 23 that are connected both to the surface plate 21 and to the surface plate 22 on the other side. Thereby, the window corner severer in strength can be easily fitted with a reinforcing member by means of partical welding, so that stresses can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body of a railway vehicle formed by using hollow members.

[0002]

2. Description of the Related Art It has been disclosed in Japanese Patent Application Laid-Open No. 2-246683 that a light metal hollow extruded profile is used to form a vehicle body of a railway vehicle.
No. in the official gazette.

[0003]

As described above, in the structure in which the vehicle body is formed of a hollow extruded member as described above, there are the following problems.

(1) In order to reduce the stress at the corners of the window of the side structure where high stress is generated, the thickness of the hollow extruded sections of the waist, curtain, and blower (window post) constituting this portion is increased. There is a need. Accordingly, the weight of the structure increases.

[0005] When the vehicle body is made of a relatively thick hollow extruded profile, in order to reduce the weight of the vehicle body as a whole,
It is necessary to use a thick-walled profile only in a portion where strength is severe, and to use a normal hollow extruded profile in other portions. However, if it is attempted to apply profiles having different wall thicknesses in the longitudinal direction of the vehicle body, such as in the corners of a window, the number of types of profiles increases, which leads to an increase in cost. Further, in order to assemble by welding, for example, by reinforcing the caul plate inside the profile, the gap between the face plates is narrow and the profile has a closed structure, so that welding in the longitudinal direction cannot be performed. Furthermore, when welding is performed, the strength characteristics of the profile near the welded part are reduced, so that the surrounding strength needs to be re-evaluated.

(2) The width of the hollow extruded section becomes a finite length (about 400 to 500 mm) in view of its manufacturability, and it is necessary to weld and join each section. For this reason, there is a limit to the thickness reduction of the profile in consideration of thermal deformation due to welding.

[0007] A car body made of a hollow extruded shape is characterized by a good appearance of the car body because the out-of-plane bending rigidity of the shape is large and distortion generated on the outer surface of the car body can be suppressed small. Therefore, in the case of a lightweight structure, it is important to prevent welding deformation.

An object of the present invention is to provide a vehicle body of a railway vehicle which can relieve the stress of a locally high-stress portion in a vehicle body made of a hollow profile member and does not increase the weight of the whole vehicle body.

[0009]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle body made of a hollow profile, in which a high stress is generated inside a hollow profile, such as a corner of a window near a fulcrum of a side structure.
The gap between the two ribs connected to one face plate and the gap between the two ribs connected to the other face plate, between the two ribs, is reduced by overlay welding on the smaller face plate. Achieved.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. In FIG. 2, a vehicle body of a railway vehicle includes an underframe (not shown) forming a floor, a roof structure (not shown) forming a roof, and a side structure 1 forming a space between the two.
Consists of The side structure 1 includes a side beam 2 connected to the underframe, a waist 7 forming a lower part from the window 4, a curtain part 8 forming an upper part from the window 4, a girder 6 connected to the roof structure, and a window. 4 and a window 9 between the window 4 and the like. These are connected by welding. 3 is a doorway. The side structure 1 has large openings such as an entrance 3 and a window 4.

The side structure 1 is a trolley (not shown) via an underframe.
It is listed in Reference numeral 5 denotes a position of the truck, that is, a fulcrum that supports the weight of the vehicle. A load (concentrated load) is applied from the fulcrum 5. Therefore, a high stress due to a large shearing force is locally generated in the window corner 10 including the blower 9 between the two fulcrums 5 and near the fulcrum 5.

3 and 4, a side structure 1 includes a plurality of hollow extruded members arranged in parallel along a longitudinal direction of a vehicle body.
It is constructed by welding. Since high stress is locally generated in the window corner 10, the extruded window 4 of the waist portion 7 and the curtain portion 8 is formed.
The side is cut off by machining, and the corner of the window is formed in an arc shape. By adopting such a structure, the strength of the window corner can be improved to the strength of the base material of the present constituent material, which is advantageous for weight reduction.

As shown in FIGS. 3 and 4, the welding position 11 between the waist portion 7 and the curtain portion 8 and the blower 9 is a position where the generated stress is slightly away from the window corner (arc portion) where high stress is generated. And Welding lines 12 and 13 indicate welding lines between the waist and the curtain, the underframe, and the roof structure, respectively.

In FIG. 5, the welded portions of the profile members of the side structure 1 have the shape of the adjacent profile member and male and female, and the joint portion between them has an insertion structure. That is, the end member 25 of the blower 9
Is inserted into the end member 24 of the waist 7, and the two are joined by welding 11.

The hollow extruded section is formed of two face plates 21 and 22 and a plurality of ribs 23 arranged in a truss shape except for its ends. That is, the ribs 23 are alternately arranged with respect to the face plate 21 (22). The face plates 21 and 22 and the rib 23 are connected via an arc portion (fillet portion) so that a force is smoothly transmitted at a joint portion between the two.

In a vehicle body formed of a hollow extruded profile,
The stress generated in the arc portion at the corner of the window becomes maximum near the arc toe of the arc portion at the corner of the window 4. This is because the window 4 is designed to be as wide as possible, and the width of the blower 9 is reduced. Therefore, in the hollow extruded shape members shown in FIGS. 3 and 4, the maximum stress is generated in a member near the corner of the window. The maximum stress is composed of an in-plane stress and an out-of-plane bending stress component of the two face plates 21 and 22, and is represented by the sum of the two.

The stress generated at the corner of the window also differs at the longitudinal position of the vehicle body. The maximum stress occurs at the window corner near the fulcrum 5, and the stress value decreases as approaching the center of the vehicle body (the same applies to the end side of the vehicle body).

When the window corner is formed by a hollow extruded profile, the dimensions of the profile are uniform over the entire length of the vehicle body. for that reason,
The thickness of the face plates 21 and 22 where the maximum stress occurs is determined by the stress value of the window corner where the maximum stress occurs. Therefore, at other low stress generation points, the structure becomes thicker than the limit value, which is disadvantageous in terms of weight reduction.

On the other hand, a large stress is not generated in the central part of the blower 9 which is farther from the arc portion at the corner of the window. for that reason,
In terms of strength, this member can be made thinner. However, when the thickness of the member is reduced, thermal distortion occurs due to welding for joining the shaped members, and thus there is a limit to weight reduction.

In FIG. 1 and FIG. 2, a reinforcing member 32 is disposed after the inside of the section of the window corner where high stress is considered to be generated. It is often unnecessary at the window corner at the longitudinal center of the vehicle.

The reinforcing member 32 has a smaller distance between the ribs 23, 23 of the distance between the two ribs 23, 23 connected to the face plate 21 and the distance between the two ribs 23, 23 connected to the face plate 22. It is provided on the face plate 21. The reinforcing member 32 is welded to the face plate 21 by overlay welding. Overlay welding 32
Is, for example, about 10 mm in thickness and about 20 mm in length. Overlay welding is performed from the opening on the window 4 side. The reinforcement member (build-up welding) 32 is provided only in a portion of the window corner 10 of the blower 9 where high stress is generated and reinforcement is considered necessary.
An end portion of the overlay welding 32 has an arc shape with an ellipse on the back side. The end of the overlay welding 32 (except for the window 4 side) is gradually thinned.

According to such a configuration, out-of-plane deformation of the face plates 21 and 22 in the hollow extruded profile can be prevented,
Out-of-plane bending stress generated in this portion is greatly reduced. Further, since an arc-shaped member is provided for the reinforcing member 32, an in-plane stress component generated in the face plate 21 can be reduced. Accordingly, the maximum stress generated at the center of the arc portion of the face plate 21 can be reduced. In addition, since the reinforcing members 32 need only be installed in necessary parts, the weight of the entire vehicle can be reduced.

[0023]

As described above, according to the present invention,
Reinforcement members can be easily attached to window corners that are severe in strength by partial welding, and stress can be reduced. As a result, the entire vehicle body can be constituted by a relatively thin hollow extruded shape member, and a good-looking vehicle body that is lightweight and has less distortion on the outer plate can be manufactured.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of the present invention.

FIG. 2 is a perspective view of FIG.

FIG. 3 is a side view of a side structure of a vehicle body of a railway vehicle.

FIG. 4 is an enlarged view of a “4” part of FIG. 3;

FIG. 5 is a sectional view taken along line 5-5 in FIG. 4;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... side structure, 4 ... window, 9 ... blowing, 10 ... window corner, 21 ... face plate, 22 ... face plate, 23 ... rib, 32 ... reinforcement member.

Continued on the front page (72) Inventor Kentaro Masai 794, Higashi-Toyoi, Kazamatsu, Kudamatsu City, Yamaguchi Prefecture Inside the Kasado Plant, Hitachi, Ltd. Kasado factory

Claims (1)

[Claims] 1. A side structure is formed by using a hollow member composed of two face plates and a plurality of ribs for joining the face plates to each other, the ribs being alternately oriented with respect to the face plates. The space between the two ribs connected to one face plate and the space connected to the other face plate in a space surrounded by the two ribs and the two face plates at the window corner of the blower window, Of the spacing between the two ribs, the face plate where the spacing between the two ribs is smaller,
A vehicle body of a railway vehicle, which is weld-welded.