JPH03220058A - Vehicle body structure of railway/rolling stock - Google Patents

Abstract

PURPOSE:To improve the strength of a car body by using inexpensive side beams by forming the side beam of a base frame from an outward directed channel member, welding the channel member on the inner surface of the outer plate of a side frame, and butt-joining a variety of laterally directed beams on the back surface of the side frame. CONSTITUTION:The side beam 2 of a base frame 1 of a car body consists of an outward channel member, and the groove 2a is directed outside. As for a variety of laterally directed beams 4 of the base frame 1, the edge part 4a is butt-joined with a flat back surface 2a which is directed to the inside of the side beam 2, and joined through welding 5. Further, as for the side beam 2, the outside part to which the groove 2a is opened is attached on the inner surface of the outer plate 7 of the side frame 6 of the car body, and joined through welding. In the welding of the side beam 2, each lap part 9 is attached on an inward bent flange 7a which is formed at the lower edge part of the outer plate 7 and a flange 8a consisting of an angle member 8 which is installed on the inner surface of the outer plate 7 through welding 5 over the bent flange 7a, and both the flanges 7a and 8a are welded.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the car body structure of a railway vehicle, and particularly to an improvement in the connection structure between the outer panel of the side structure and the side beam of the underframe.

(Prior Art) Conventionally, this type of coupling structure has adopted either the first structure shown in FIGS. 3 and 4 or the second structure shown in FIG. 5.

In each of the first and second structures, the side beams of the underframe a are made of inward channel members, and the ends of various horizontal beams e are butted against the open portions d of the side beams and are joined to each other. In the first structure, the lower end of the outer plate g of the side structure f abuts against the outer edge of the upper surface of the side beam and is joined to each other. In the second structure, the outer plate g is attached to the outward flat back part of the side beam by its inner elongated sill or the like and is joined to the outer plate g.

(Issues to be Solved by the Invention However, in each of the above-mentioned first and second conventional structures, the ends of the various horizontal beams e have a complicated shape to match the shape of the side beams that are open inward. Since they must be cut and joined together, they are not easy to work with and are therefore expensive.

Further, in each of the first and second structures, each member simply exhibits its respective strength in its respective portion. Therefore, the required strength depends solely on the selection of each material.
This is achieved through increased wall thickness and side beams with a special cross section. For this reason, in order to respond to the current problem of reducing weight and achieving the necessary strength in high-speed vehicles such as 300 mph (300) 01, it is necessary to select aluminum-based materials for the side beams, and to achieve the required strength. It is required to have sufficient wall thickness and a special cross-sectional structure to obtain the required strength, and since it is an extruded product, the cross-section is common even in areas where strength is not required, making it particularly expensive.

SUMMARY OF THE INVENTION An object of the present invention is to provide a car body structure for a railway vehicle that can solve the above-mentioned conventional problems by improving the combination structure of conventionally used materials.

(Means for Solving the Problems) In order to achieve the above-mentioned problems, the present invention uses outward channel members for the side beams of the underframe, and applies them to the inner surfaces of the outer panels of the side structure to connect them to each other. It is characterized in that the end portions of various horizontal beams are butted against the back surface of the side beam and joined to each other.

The side beam may be joined to an inwardly directed flange formed on the inner surface of the outer panel of the side structure so as to have a lap.

(Function) The present invention has the above-mentioned configuration, and the side beams of the underframe are outward-facing channel members, and are joined to the inner surface of the outer panel of the side structure, so that the side beams and the outer side beams are connected to each other. The plates have a box-shaped cross-sectional structure that has a high deformation strength such as bending while maintaining the conventional shape, and can exert a synergistic effect that gives the car body greater strength than the side beams and the outer plate individually.

Furthermore, since the flat back of the side beam faces inward and the ends of the various horizontal beams of the underframe are butted against and joined to this, the ends of the various horizontal beams can be simply cut and joined to the side beams.

Furthermore, when the side beam is joined to the inner surface of the outer panel with its inward flange and lap, it is possible to adjust the amount of lap at the time of joining to adjust the mutual distance between the side beam and the outer panel as appropriate. can.

(Example) To explain the first example of the present invention shown in FIG. 1, the side beams 2 of the underframe 1 of the vehicle body are made of outward channel members, and the grooves 2a are directed outward. End beams of the underframe 1, floor support beams, various horizontal beams 4 such as pillow beams, cross beams, etc. are at their ends 4a
are butted against the inwardly facing flat back surface 2a of the side beam 2 and joined by welding 5.

The side beams 2 are also applied to the inner surface of the outer plate 7 of the side structure 6 of the vehicle body at the outer part where the groove 2a is open, and are welded together 5.
are joined by. In this connection, a lap portion 9 is formed between an inwardly bent flange 7a formed at the lower edge of the outer panel 7 and a flange 8a made of an angle material 8 attached to the inner surface of the outer panel 7 by welding 5 above the flange 7a. This is done by welding 5 onto them. The lap portion 9 serves to adjust the mutual distance between the side beam 2 and the outer panel 7.

A downward draining flange 7b is bent from the inner end of the flange 7a of the outer plate 7. This drain flange 7
b serves to prevent rainwater from entering the joint between the outer panel 7 and the side beam 2, etc.

Welding 5 is fillet welding, which is also tack welding, but it is not limited to this, and spot welding from both the front and back surfaces 11
Any method may be used, such as series spot welding from one side, seam welding from both sides or one side. Weld bonding using the adhesive side can also be applied, and in short, the specific joining method and structure between each member can be selected based on various conditions such as the need for sealing, required strength, welding location, cost, etc. and can be designed.

Since the side beams 2 and the outer skin 7 have a box-shaped cross-sectional structure with high strength, they exhibit a synergistic effect that gives greater strength to the vehicle body than when they exert their respective strengths individually.

Furthermore, as shown by imaginary lines in FIG. 1, the strength of the box-shaped structure can be improved at low cost simply by laminating the reinforcing plate 12 on the inner surface of the outer panel 7.

In the second embodiment of the present invention shown in FIG. 2, the side beams 2 are directly attached to the inner surface of the outer panel 7. The structure is further simplified, which is advantageous in terms of weight reduction. The outer plate 7 extends straight downward to form a drainage flange 7b. The side beam 2 is formed with an auxiliary flange 2b that supports the draining flange 7b from inside.

(Effects of the Invention) According to the present invention, the side beams of the underframe are outward-facing channel members, and are joined to each other by abutting against the inner surface of the outer panel of the side gutter.
The side beams and the outer skin have a box-shaped cross-sectional structure with high deformation strength such as bending, and have a synergistic effect that gives the car body greater strength than the side beams and the outer skin individually.
It is possible to improve the strength of the vehicle body by using conventional, inexpensive materials, shapes, and thick side beams, making it possible to make high-speed vehicles that need to be lighter and meet the required strength at a lower cost. can be provided.

In addition, the flat back of the side beam faces inward and the ends of the various horizontal beams of the underframe are butted against and joined to this, so the ends of the various horizontal beams can be simply cut and joined to the side beams. In this respect as well, the cost of the vehicle body can be further reduced.

Furthermore, when the side beam is joined to the inner surface of the outer panel with its inward flange and lap, it is possible to adjust the amount of lap at the time of joining to adjust the mutual distance between the side beam and the outer panel as appropriate. This makes it possible to easily deal with dimensional errors in the underframe, side gutters, etc. at the stage of assembling them.

[Brief explanation of drawings]

1 and 2 are perspective views of a part of the vehicle body showing the first and second embodiments of the present invention, and FIGS. 3 and 4 are part of the vehicle body showing the first conventional example. A schematic perspective view and an enlarged perspective view of a very small part, and FIG. 5 is an enlarged perspective view of a very small part of a vehicle body showing a second conventional example. Underframe side beam Lateral beam end welding Toilet tank outer plate flange Flange wrap spot welding

Claims (2)

[Claims] (1) The side beams of the underframe are made of outward facing channel materials, which are applied to the inner surface of the outer panel of the side structure and joined together, and the ends of the various horizontal beams are butted against the back of the side beams. A railway vehicle body structure characterized by being joined together. (2) The vehicle body structure for a railway vehicle according to claim (1), wherein the side beam is joined to have a lap with an inward flange formed on the inner surface of the outer plate of the side structure.