JP2007055483A - Rail vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rail vehicle having good riding comfort by suppressing elastic vibration of a vehicle body with improved rigidity of the vehicle body without changing the appearance of the vehicle. <P>SOLUTION: Aluminum extruded materials of members 12, 13 and 14 structuring a framework 10 is formed higher than a material structuring a member 11. In the case wherein plate thickness of a surface plate structuring each of the extruded materials is equal to each other, the members 12, 13 and 14 are hard to be bent outward in comparison with the member 11, namely, bending rigidity of the members 12, 13 and 14 are stronger than that of the member 11. With this structure, vehicle body rigidity can be improved to reduce vibration of the vehicle body. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a rail vehicle. Here, a rail vehicle means vehicles, such as a rail vehicle and a monorail vehicle.

  In recent years, there is a strong demand for higher speeds in railway vehicles, and in order to achieve this higher speed, the weight of vehicles is being reduced. Further, from the viewpoint of global environmental conservation such as energy saving and reduction of load on the orbit, the weight reduction of vehicles has been promoted strongly. 2. Description of the Related Art In recent years, a railway vehicle configured by using an aluminum extruded profile has been manufactured mainly for the purpose of reducing the weight. On the other hand, there is also a strong demand for comfort represented by quietness in the vehicle and improved riding comfort for improving passenger services. As for comfort, until now, studies have been made mainly on trains with a long boarding time represented by limited express vehicles, but in recent years, demands for commuter vehicles have also increased.

  The vehicle is composed of a frame on which passengers ride, a side structure that constitutes both sides of the vehicle, a roof structure that constitutes the top surface of the vehicle, and a wife structure that is joined to the frame, side structure, and roof structure at the longitudinal end of the vehicle. Composed. Side entrances and window openings are installed in the side structure.

  In a commuter vehicle, in order to allow a large number of passengers to get on and off at a stop station in a short time, about 3 to 4 side entrances are provided per one side. In many cases, a double door is used for the side entrance, and the side entrance opening is larger than that of the express vehicle. Another feature is that the window has a large opening. Depending on the size and arrangement of these side entrance openings and window openings, the rigidity of the vehicle body becomes low, and the occurrence of elastic vibration of the vehicle body becomes significant. When the elastic vibration of the vehicle body occurs in a frequency band that humans feel sensitively, the ride comfort is greatly deteriorated.

  As a means for solving this, it is conceivable to change the size and arrangement of openings such as side doorways and side windows to improve the rigidity of the vehicle body. However, the change of the opening is related to the appearance of the entire vehicle, and there are problems with passenger guidance and getting on and off the station platform, so it cannot be changed easily.

In a railway vehicle, in order to reduce vehicle body elastic vibration, a movable mass body is attached to the center of the vehicle body via a spring, and the vertical vibration of the floor portion at the center of the vehicle body is detected by the detection means. An apparatus has been proposed in which elastic vibration of a vehicle body is reduced by moving a movable mass body up and down by an actuator after compensating for gain and phase (see Patent Document 1). In this apparatus, since the movable mass body can be constituted by a relatively light body, the elastic vibration of the vehicle body can be reduced without causing any problem in terms of weight reduction of the vehicle body.
JP-A-10-147241 (paragraphs [0007] to [0013], FIGS. 1 to 4)

  The present invention provides a railway vehicle that has a comfortable riding comfort by suppressing the elastic vibration of the vehicle body by improving the rigidity of the vehicle body with a simple structure without changing the appearance of the vehicle.

The object is to provide a rail vehicle having a frame made of an aluminum extruded profile, wherein the frame is composed of a plurality of members assembled along the longitudinal direction of the vehicle, and the plurality of members is a first member. This can be achieved by making the bending rigidity of the second extruded profile higher than that of the first extruded profile.
In addition, in the rail vehicle having a frame made of an aluminum extruded profile, the object is composed of a plurality of members assembled along the longitudinal direction of the vehicle, and the plurality of members are A plurality of first extruded profiles arranged along the longitudinal direction of the vehicle, and the first extruded profile facing the extrusion direction in the width direction of the vehicle at the longitudinal center of the underframe And a second extruded profile bonded to the substrate.

  According to the present invention, in the longitudinal direction of the vehicle, it is possible to reduce the elastic vibration of the vehicle body primary mode that vibrates with the front and rear carriage portions of the vehicle as nodes and the center of the vehicle body as the belly. Further, it is possible to reduce the elastic vibration of the vehicle body secondary mode that vibrates with both the front and rear trolley parts of the vehicle and the center of the vehicle body as a node and between the vehicle body center and the trolley supporting the frame.

  Embodiments of a rail vehicle according to the present invention will be described below with reference to the drawings. 1, FIG. 2, FIG. 5 and FIG. 6 are views showing Embodiment 1 of the rail vehicle according to the present invention, and FIGS. 7 to 10 are views showing another embodiment of the rail vehicle according to the present invention.

  One embodiment of the present invention will be described with reference to FIGS. In FIG. 1, the underframe 10 includes a plurality of members 11, 12, 13, and 14 assembled along the longitudinal direction of the vehicle. Here, each of the members 11, 12, 13, and 14 is formed by welding or friction stir welding of a plurality of aluminum hollow extruded shapes. The joints of the members 11, 12, 13, and 14 constituting the frame 10 are joined by welding or friction stir welding. The extrusion direction of the members (shape members) 11, 12, 13, and 14 is the longitudinal direction of the vehicle.

  In FIG. 2, the extruded shape made of aluminum constituting the member 11 is a hollow shape configured as the first extruded shape, and the extruded shape made of aluminum constituting the members 12, 13 and 14 is the first. 2 is a hollow profile configured as an extruded profile. The profile heights of the members 12, 13, and 14 are configured to be higher than the profile height constituting the member 11.

  When the plate thickness of the face plates constituting each extruded shape member 11, 12, 13, 14 is equal, the members 12, 13, 14 are less likely to bend in the out-of-plane bending direction than the member 11, that is, the bending rigidity. Will be expensive. The bending rigidity of the members 12, 13, and 14 can be increased not only by the thickness of the face plate but also by the material.

  The member 13 is provided in the center part of the longitudinal direction of the vehicle in the underframe 10 for the purpose of reducing the elastic vibration of the vehicle body primary mode that vibrates with the center of the vehicle body as an antinode. In addition, the members 12 and 14 are respectively arranged in the frame 10 for the purpose of reducing elastic vibration in the vehicle body secondary mode that vibrates around the center between the vehicle body center and the carriages 31 and 31 supporting the frame. The pedestal 31, 31 is provided between a pillow beam portion (not shown) of the underframe and the vehicle body central portion. The vehicle body primary mode is a mode in which the vehicle body frame 10 is elastically deformed as shown in FIG. 3, and the vehicle body secondary mode is a mode in which the vehicle body frame 10 is elastically deformed as shown in FIG. Say.

  In FIG. 2, the joining method in the state in which the shape members 11, 12, 13, and 14 are different in height is, for example, by placing an aluminum partition plate 21 between the shape members 11, 12, 13, and 14, and This can be solved by welding the profiles on both sides.

  Here, the upper surface side of FIG. 2 is the vehicle exterior (under the floor of the vehicle) side, and the lower surface side is the vehicle interior side. The profiles 11, 12 (13, 14) are assembled with the vehicle interiors substantially in the same plane. Many rail vehicles have a structure in which an electric wire is passed through the underside of the underframe. 5 and 6 are respectively a front view showing an example of the joint portion of FIG. 2 and a front view showing another example of the joint portion of FIG. In the example shown in FIG. 2, as shown in detail in FIGS. 5 and 6, rectangular or elliptical through holes 22 and 23 are provided in the partition plate 21, and electric wires (not shown) are provided in these through holes 22 and 23. .)

  In another embodiment according to the present invention, in FIG. 1, the profile height of each extruded profile of the members (profiles) 11, 12, 13, and 14 constituting the frame 10 is equal to the profile height of the member 11. It is configured. Here, as shown in FIG. 8, the thickness of the face plate of each extruded profile constituting the members 12, 13, 14 is thicker than the thickness of the face plate of the member 11 shown in FIG. 7. Therefore, the members 12, 13, and 14 have a higher bending rigidity than that of the member 11. The bending rigidity can be increased not only by the thickness of the face plate but also by the material.

  In FIG. 9, among the members 11, 12, 13, and 14 constituting the frame 10a, the extrusion directions of the profiles 12, 13, and 14 arranged at the center in the longitudinal direction of the vehicle are both ends in the longitudinal direction of the vehicle. It is a direction orthogonal to the extrusion direction of the shape member 11 arrange | positioned in this. That is, it faces the width direction of the vehicle. The joint portions of the members 11, 12, 13, and 14 constituting the frame 10a are joined by welding or friction stir welding as in the above-described embodiment. In this example, the member 12 (13, 14) is coupled to the member 11 at the front and rear ends.

  Another embodiment according to the invention is shown in FIG. A base frame 10b shown in FIG. 10 has a first shape member (for example, a hollow shape member) 11 arranged in the longitudinal direction of the vehicle, and a second shape member (for example, a hollow shape) on a surface outside the vehicle. Material) 12 is welded and joined. The first profile 11 constituting the frame before welding the second hollow profile 12 has the same height on both the upper surface and the lower surface. The second shape member 12 is welded to the center portion in the longitudinal direction of the underframe 10b and to the middle between the center portion and the position of the carriage 31 (see FIG. 1). The extrusion direction of the second hollow shape member 12 faces the width direction.

The perspective view of the frame of a vehicle in one Example of this invention. The perspective view of the junction part of one profile of the frame shown in FIG. 1, and the adjacent profile. The deformation | transformation figure of the frame in the primary mode of a vehicle body. The deformation | transformation figure of the frame in the secondary mode of a vehicle body. The front view which shows an example of the junction part of FIG. The front view which shows the other example of the junction part of FIG. The longitudinal cross-sectional view of a hollow extrusion shape member. The longitudinal cross-sectional view of the other example of a hollow extrusion shape member. The perspective view of the frame of another Example of this invention. The perspective view of the frame of the other Example of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10, 10a, 10b ... Base frame 11, 12, 13, 14 ... Aluminum extrusion shape 21 ... Aluminum flat plate 22, 23 ... Aluminum flat plate through-hole 31 ... Dolly

Claims (10)

In a rail vehicle having a underframe constructed of an aluminum extruded profile,
The underframe is composed of a plurality of members assembled along the longitudinal direction of the vehicle,
The plurality of members comprises a first extruded profile and a second extruded profile,
Making the bending rigidity of the second extruded profile higher than the bending rigidity of the first extruded profile;
Rail vehicle characterized by. In the rail vehicle according to claim 1,
The extrusion direction of the first extruded profile and the second extruded profile is oriented in the longitudinal direction of the vehicle;
Rail vehicle characterized by. In the rail vehicle according to claim 2,
There is a partition plate between the first extruded profile and the second extruded profile,
The first extruded profile and the second extruded profile are welded to the partition plate;
Rail vehicle characterized by. The rail vehicle according to claim 2, wherein a height of the second extruded profile is higher than a height of the first extruded profile.
Rail vehicle characterized by. In claim 3,
The first extruded profile and the second extruded profile are assembled with the vehicle interior of the vehicle substantially in the same plane;
Rail vehicle characterized by. In the rail vehicle according to claim 2,
The second extruded shape member is disposed at a central portion in a longitudinal direction of the vehicle;
Rail vehicle characterized by. In the rail vehicle according to claim 6,
The second extruded profile is made of a material different from the first extruded profile,
The second extruded profile is made of a material having a higher bending rigidity than the first extruded profile;
Rail vehicle characterized by. In the rail vehicle according to claim 2,
The second extruded shape member is disposed between a position corresponding to the carriage supporting the underframe and a central portion in the longitudinal direction of the vehicle;
Rail vehicle characterized by. In the rail vehicle according to claim 8,
The second extruded profile has a thicker face plate than the first extruded profile;
Rail vehicle characterized by. In a rail vehicle having a underframe constructed of an aluminum extruded profile,
The underframe is composed of a plurality of members assembled along the longitudinal direction of the vehicle,
The plurality of members include a plurality of first extruded shape members arranged along a longitudinal direction of the vehicle, and a first portion of the longitudinal direction of the underframe facing the extrusion direction in the width direction of the vehicle. A second extruded profile joined to one extruded profile,
Rail vehicle characterized by.

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