JP2010030359A - Vehicle structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle structure enabling simplifying of manufacturing of the vehicle structure and reducing of manufacturing cost by avoiding generation of a complicated stress field in a round part of an opening part in a hollow extruded shape having an internal structure having joining of face plates and connecting plates. <P>SOLUTION: In this vehicle structure, corner parts Rb to be the round parts in the opening part 3b of the face plates 11 at the vehicle inside are located outside knot parts 14b, 14b of the face plates 11 at the vehicle inside and the connecting plates 13a and 13b. The complicated stress field is avoided from being generated by mutual influence of the corner parts Rb and the knot parts 14b. By increasing a radius of curvature of an edge part of each of the corner parts Rb in place of the structure or by adding to the structure, large stress is hardly generated to avoid the generation of the complicated stress field. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle body structure formed by using a hollow extruded profile, and particularly to a vehicle structure in which an opening such as a window suitable for a vehicle body of a railway vehicle is formed.

  Conventionally, mass reduction and strength improvement have been strongly demanded for structures of railway vehicles. In order to achieve this contradictory problem, it is necessary to study the strength of the corners of openings such as windows provided in the side structure constituting the structure, and various measures for improving the strength have been proposed.

  In other words, the side structure of the vehicle is configured by using a hollow extruded member composed of two opposing face plates and a connecting plate for connecting the two side plates, and the side structure has an opening penetrating the hollow extruded member. The window is formed by forming the part. In order to attach the window glass from the inside of the vehicle, the window is formed in a shape in which the opening of the inner side plate is slightly larger than the opening on the outer side of the vehicle.

  By the way, in the side structure of the vehicle, for example, when the vehicle passes through the tunnel alone or when it passes the oncoming train in the tunnel, the difference between the atmospheric pressure inside and outside the vehicle, the vibration caused by the running of the vehicle, the equipment mounted on the vehicle, High repetitive stress is generated due to the mass and the like, and stress concentration tends to occur in the R portion of the opening portion of the vehicle interior side plate formed as a window. In particular, if a nodal point where the connection plate of the hollow extruded profile is connected to the face plate is located in the R portion having a large curvature, a complex stress field is generated at the nodal point and in the vicinity thereof. There is. When this complex stress field is generated, a part having a particularly high stress is likely to be generated, and as a result, the structure may be destroyed.

  Therefore, conventionally, various processing is applied to the nodal point located at the R portion of the opening provided in the side structure to avoid the generation of such a complicated stress field. However, the structure of the nodal point between the face plate and the connection plate is generally complicated, and the access to the machining tool to the part is not sufficiently obtained, and therefore there is a limit to the correspondence when complicated machining is required. was there.

  In the side structure formed by arranging the extruded shape members in the longitudinal direction of the vehicle body, the thickness of the face plate of the extruded shape members is increased at the portion where the window portion is formed. That is, the face plate of the extruded shape member from the upper part of the window to the lower part of the window is thickened. As another embodiment, only the thickness corresponding to the corner of the window is increased, and the central portion is decreased in thickness to reduce the weight (see Patent Document 1). Two face plates In a side structure using a hollow extruded shape member constituted by a connecting plate, there is one that adopts a similar structure (see Patent Document 2). Further, the strength is improved by the thickness of the face plate and the pitch of the connection plate. Further, there has been proposed a plate (see Patent Document 3) welded to the end of a hollow extruded shape member that forms between the windows, and the plate is a face plate inside the vehicle of the hollow extruded shape member. And the face plate on the outside of the vehicle.

  In addition, the present applicant has already made a vehicle structure in which a side structure is formed by using a hollow shape member composed of two face plates and a connection plate for joining the approximate face plates, and a window provided on the side structure. Only the thickness of the face plate of the hollow shape member that forms the blowing that is the part between the windows should be uniformly thicker in the longitudinal direction of the vehicle body than the thickness of the face plate of the other hollow shape member that constitutes the side structure. Has proposed a vehicle structure having a high equivalent bending rigidity and a light weight (see Patent Document 4).

Further, the present applicant has already made the thickness of the face plate of the extruded shape member in the region in the upper and lower ranges with respect to the respective continuous contact points of the vertical side of the window and the arc at the corner of the window as compared with this region. It is thicker than the thickness of the face plate of the extruded shape member at the upper and lower positions, the region having a thick plate thickness from the continuous contact on the upper side of the window, and the continuous contact on the lower side of the window Proposing a vehicle body that can reduce the mass and achieve improved strength by making the thickness of the face plate between the thicker region thinner than that of the thicker region. (See Patent Document 5). As another means that can be applied in addition to the window, it is also proposed to arrange a buckling prevention device in the space surrounded by the face plate and the connecting plate for the hollow shape forming the vicinity of the corner of the opening. ing. As another means, a vehicle has been proposed in which the thickness of the face plate on the vehicle interior side of the hollow member constituting the side structure is made larger than the thickness of the face plate on the vehicle exterior side.
Japanese Examined Patent Publication No. 6-45341 JP-A-2-246863 JP 7-257371 A Japanese Patent No. 3189720 Japanese Patent No. 3497847

  Therefore, in the hollow extruded profile with the internal structure of joining the face plate and the connection plate, pay attention to the correlation between the curvature of the R part of the opening in the face plate inside the vehicle and the knot portion of the face plate and the connection plate. There is a problem to be solved in that a complicated stress field in the R portion of the opening is avoided.

  An object of the present invention is to simplify the structure of a vehicle structure and reduce the manufacturing cost by eliminating the need for special processing work in order to avoid the generation of a complex stress field at the R part of the opening of the structure. It is to provide a vehicle structure that makes it possible.

  In order to solve the above-described problems, a vehicle structure according to the present invention is configured by using a hollow extruded shape member including two opposing face plates and a connection plate for joining the double face plates, and the hollow extruded shape member. The vehicle body is formed with an opening such as a window, and the R portion of the opening of the face plate inside the vehicle is positioned away from the knot portion between the face plate inside the vehicle and the connection plate. It is characterized by being.

  Further, the vehicle structure according to the present invention is a virtual structure when the R portion of the opening portion of the face plate inside the vehicle is connected tangentially to two opening edge portions having a single radius of curvature and sandwiching the R portion. Compared with the R portion, the portion is formed with a large radius of curvature that enters the inside of the face plate inside the vehicle beyond the virtual R portion.

  Further, the vehicle structure according to the present invention is configured by using an air extruded shape composed of two opposed face plates and a connection plate for joining the both face plates, and an opening such as a window is formed in the air extruded shape. In which the R portion of the opening of the face plate on the vehicle interior side is positioned away from the knot portion between the face plate on the vehicle interior side and the connection plate. Compared to the virtual R portion when the R portion of the opening of the face plate is connected tangentially to two opening edges having a single radius of curvature and sandwiching the R portion, the virtual R portion is It is characterized by being formed with a large radius of curvature that goes beyond the face plate inside the vehicle.

  According to this vehicle structure, since the R portion of the opening of the face plate inside the vehicle is located away from the nodal portion between the face plate inside the vehicle and the connection plate, the R portion and the nodal portion are mutually connected. Generation of complex stress fields that affect each other is avoided. Further, instead of or in addition to placing the R portion at a position out of the nodule portion, by increasing the radius of curvature of the edge portion of the R portion, stress concentration is less likely to occur. The stress can be reduced compared to the example.

  Since the present invention is configured as described above, the interaction between the nodule portion and the R portion, the radius of curvature of the R portion, which is considered to be a cause of generation of a complex stress field in the R portion of the opening of the structure, Therefore, it is possible to avoid the generation of a complicated stress field in the R portion without requiring special processing work, and to simplify and manufacture the vehicle structure. Cost can be reduced.

  Hereinafter, embodiments of a vehicle structure according to the present invention will be described with reference to the accompanying drawings. FIG. 1 is a view of a part of a side structure of a vehicle according to the present invention as viewed from the outside of the vehicle. FIG. 2 is a view of the side structure shown in FIG. It is a figure which shows sectional drawing (left side figure) cut | disconnected by the plane which passes through.

  FIGS. 1 and 2 show an opening 3 forming a window 2 and a structure in the vicinity thereof as a side structure 1 of a vehicle. Two hollow extrusions extending in the longitudinal direction of the vehicle body with the window 2 interposed therebetween The members 10 and 10 are joined to each other. The two hollow extruded shapes 10 and 10 can be joined by friction stir welding, and the position is an intermediate position in the height direction of the window 2.

  As for the window 2, when viewed through the window 2, the window 2b on the vehicle interior side is formed to be slightly larger so as to include the window 2a on the vehicle exterior side. The four corners of the opening 3b that forms the vehicle-inside window 2b and the opening 3a that forms the vehicle-outside window 2a are R portions, but the corner portion Ra of the opening 3a on the outside of the vehicle is more The edge portion Rb of the vehicle interior opening 3b is edged with a larger radius of curvature.

  Each hollow extruded shape member 10 is composed of a vehicle outer side plate 11 and a vehicle inner plate 12 arranged substantially in parallel with each other, and a plurality of connection plates 13, 13... Connecting the double side plates 11, 12. In each hollow extruded member 10, the connection plates 13 a and 13 a on the opening side between the double-sided plates 11 and 12 that open in the direction crossing the longitudinal direction extend perpendicular to the double-sided plates 11 and 12. The connecting plates 13b, 13b... Between the plates 13a, 13a extend in a truss-like manner when viewed in the cross section shown in FIG.

  The portions where the connecting plates 13a, 13b and the face plates 11, 12 cross and connect are strip-like knot portions extending in the longitudinal direction of the hollow extruded profile 10, and in the cross-sectional view shown in FIG. Since it is expressed as a relatively narrow range such as a shape, it is called a nodule (nodule portion). The knot portion is a portion where the face plate and the connection plate intersect, and has a complicated structure. Here, the joint portion of the vehicle outer side plate 11 with the connection plates 13a and 13b is 14a, and the joint portion of the vehicle inner side plate 12 with the connection plates 13a and 13b is 14b.

  In the present embodiment, the corner portion Rb of the opening 3b in the face plate 12 on the vehicle inner side is placed at a position away from the joint portions 14b and 14b between the car side surface plate 12 and the connection plates 13a and 13b. As shown in the cross-sectional view of FIG. 2, the corner Rb has adjacent nodal portions 14b and 14b, that is, a nodal portion 14b between the vehicle inner side surface plate 12 and the connection plate 13a, and a node between the vehicle inner side surface plate 12 and the connection plate 13b. It is preferable in terms of stress to be positioned in the middle of the point 14b.

  In the corner portion Rb of the opening portion 3b of the vehicle inner side surface plate 12, the radius of curvature is smaller than that of the corner portion Ra of the opening portion 3a of the vehicle outer side surface plate 11, and the shape is rapidly changed. Therefore, a large stress is likely to occur at the corner Rb and the vicinity thereof. Since the nodal point 14b is arranged avoiding such a place where large stress is likely to occur, it is possible to avoid the generation of a complex stress field at the nodal point 14b.

  FIG. 3 is a view showing another embodiment of the vehicle structure according to the present invention, and is a schematic view showing another structure for avoiding the generation of a complex stress field at the corner of the opening 3b of the vehicle interior side face plate 12. As shown in FIG. is there. As shown in FIG. 3, the current border of the corner portion Rb of the opening 3b of the vehicle interior side plate 12 is shown by a solid line. The current corner portion Rb is a virtual R portion that is edged with a single radius of curvature R1 and is tangentially connected to two opening edge portions sandwiching the corner portion Rb.

  In the present embodiment, the corner portion Rb of the opening 3b of the vehicle interior side surface plate 12 is formed with a large curvature radius that enters the inside of the surface plate 12 inside the vehicle beyond the virtual R portion, as compared to the virtual R portion. ing. As an example, the corner portion Rb of the opening 3b of the vehicle interior side surface plate 12 connects R edge portions (dotted lines) at the curvature radii R2a and R2b having a plurality of sizes from a position where the virtual R portion is connected to the opening edge side portion. Is formed.

In another example, the corner Rb of the opening is larger than the radius of curvature R1 and substantially swells to the inside of the face plate 12 on the vehicle inner side than the edge of the opening. ).
Thus, by defining the edge of the corner portion Rb of the opening 3b of the vehicle interior side plate 12 with a larger radius of curvature, a complicated stress field remains when the knot portion 14b exists at the corner portion Rb. By reducing the stress concentration, the stress at the corner Rb is reduced.

  If the edge of the corner portion Rb of the opening 3b of the vehicle interior side surface plate 12 is determined with a larger radius of curvature, and the position of the knot portion 14b is determined while avoiding the corner portion Rb, the stress field is compared with the above. By becoming a single target, the stress at the corner Rb can be further reduced.

The vehicle structure by this invention WHEREIN: The figure which looked at a part of side structure from the vehicle outer side. The figure which looked at a part of side structure shown in FIG. 1 from the vehicle inner side, and the figure which cut | disconnected by the plane which passes through R part of a side structure. It is a figure which shows another Example of the vehicle structure by this invention, Comprising: The enlarged view of the R part of a side structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side structure 2 Window 2a Car outer window 2b Car inner window 3 Opening part 3a Car outer opening 3b Car inner opening 10 Hollow extrusion shape 11 Car outer side plate 12 Car inner side plate 13, 13a, 13b Connection plate 14a, 14b Nodal portion Rb Car outer corner Rb Car inner corner

Claims (6)

In the vehicle structure, which is configured using a hollow extruded shape member composed of two opposing face plates and a connection plate for joining the double face plates, and an opening such as a window is formed in the hollow extruded shape member,
The R portion of the opening of the face plate on the inner side of the vehicle is located outside the knot portion between the face plate on the inner side of the vehicle and the connection plate;
A vehicle structure characterized by. The vehicle structure according to claim 1,
The R portion of the face plate inside the vehicle is positioned in the middle of the adjacent knot portions in the face plate inside the vehicle;
A vehicle structure characterized by. In the vehicle structure, which is configured using a hollow extruded shape member composed of two facing face plates and a connection plate that joins the double face plates, and an opening such as a window is formed in the hollow extruded shape member,
Compared to the virtual R portion when the R portion of the opening of the face plate inside the vehicle is connected tangentially to two opening edge portions having a single radius of curvature and sandwiching the R portion, the virtual portion Formed with a large radius of curvature that enters the inside of the face plate inside the vehicle beyond the R part,
A vehicle structure characterized by. The vehicle structure according to claim 3,
The R portion of the opening is formed by connecting the R edge portion of the radius of curvature of a plurality of sizes from the position where the virtual R portion is connected to the opening edge side portion,
A vehicle structure characterized by. The vehicle structure according to claim 3,
The R portion of the opening is formed with substantially one radius of curvature that swells and expands to the inside of the face plate inside the vehicle than the opening edge.
A vehicle structure characterized by. In the vehicle structure, which is configured using a hollow extruded shape member composed of two facing face plates and a connection plate that joins the double face plates, and an opening such as a window is formed in the hollow extruded shape member,
While positioning the R portion of the opening of the face plate inside the vehicle away from the knot portion between the face plate inside the vehicle and the connection plate,
Compared to the virtual R portion when the R portion of the opening of the face plate inside the vehicle is connected tangentially to two opening edge portions having a single radius of curvature and sandwiching the R portion, the virtual portion Formed with a large radius of curvature that enters the inside of the face plate inside the vehicle beyond the R part,
A vehicle structure characterized by.

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