JP2022069916A - Structure - Google Patents

Abstract

To provide a grid-like structure that has excellent impact resistance and can be easily manufactured.SOLUTION: A structure 100 in which a plurality of first skeleton portions 11 and a plurality of second skeleton portions 12 are arranged orthogonally to form a grid, and that has a plurality of space portions S surrounded by the first skeleton portions 11 and the second skeleton portions 12 includes two plate-shaped members 21 and 22 that are overlapped and joined to each other, and the two plate-shaped members 21 and 22 are formed in a grid pattern, and the first skeleton portion 11 and the second skeleton portion 12 have a closed cross section.SELECTED DRAWING: Figure 3

Description

The present invention relates to a structure.

In recent years, the development of vehicles driven by electric power (including electric vehicles, hybrid vehicles, etc.) has been progressing. In a battery system mounted on such a vehicle, a large number of batteries (batteries, battery cells) are generally housed in a structure composed of a predetermined frame or the like. As a structure of such a battery system, there is one formed in a grid pattern having a storage space that can accommodate a battery.

In Patent Document 1, as a technique for forming a lattice in a structure, fitting notches formed in two members made of extruded aluminum are fitted to each other and combined in a cross shape, and the fitting portion is friction welded. It is described that they are joined by the method.

Japanese Unexamined Patent Publication No. 9-3323179

By the way, in the technique described in Patent Document 1, since a notch is formed in each member to be joined to each other, the strength may be lowered and sufficient impact resistance may not be obtained.

Further, in order to join the members to each other, a complicated processing work of forming notches that can be fitted to each other with high accuracy and a complicated joining work of joining the fitting portions of the notches by a friction welding method over the entire circumference. Was needed.

Therefore, an object of the present invention is to provide a lattice-shaped structure having excellent impact resistance and which can be easily manufactured.

The present invention has the following configuration.
A structure in which a plurality of first skeleton portions and a plurality of second skeleton portions are arranged orthogonally to form a lattice, and have a plurality of space portions surrounded by the first skeleton portion and the second skeleton portion. It ’s a body,
It has two plate-shaped members that are overlapped and joined to each other.
At least one of the two plate-shaped members is formed in a grid pattern.
At least one of the first skeleton portion and the second skeleton portion has a closed cross section.
Structure.

According to the present invention, it is possible to provide a lattice-shaped structure having excellent impact resistance and which can be easily manufactured.

It is a perspective view of the structure which concerns on 1st Embodiment. It is an exploded perspective view of the structure which concerns on 1st Embodiment. It is a figure which shows the structure of the structure which concerns on 1st Embodiment. It is a perspective view of the structure which concerns on the modification of 1st Embodiment. It is an exploded perspective view of the structure which concerns on the modification of 1st Embodiment. It is a perspective view of the structure which concerns on 2nd Embodiment. It is an exploded perspective view of the structure which concerns on 2nd Embodiment. It is a figure which shows the structure of the structure which concerns on 2nd Embodiment. It is a perspective view of the extruded material which constitutes a plate-shaped member made of a molded material. It is sectional drawing of the plate-shaped member which consists of a punched plate provided with a rib.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
(First Embodiment)
First, the structure according to the first embodiment will be described.
FIG. 1 is a perspective view of the structure 100 according to the first embodiment. FIG. 2 is an exploded perspective view of the structure 100 according to the first embodiment. 3A and 3B are views showing the structure of the structure 100 according to the first embodiment, FIG. 3A is a perspective view of the first skeleton portion 11 in cross section, and FIG. 3B is a sectional view of the first skeleton portion 11. Is.

As shown in FIG. 1, the structure 100 according to the first embodiment is used as a frame constituting an in-vehicle battery tray. The battery tray is, for example, arranged under the vehicle body floor of a vehicle (including an electric vehicle, a hybrid vehicle, etc.) driven by electric power and fixed to the vehicle body. The structure 100 used as the frame of the battery tray is configured in a grid pattern having a plurality of space portions S. A battery can be accommodated in the space portion S provided in the structure 100.

In the structure 100, a plurality of first skeleton portions 11 along the vertical direction and a plurality of second skeleton portions 12 along the horizontal direction are arranged orthogonally. As a result, the structure 100 is configured in a grid pattern having a plurality of cross portions C where the first skeleton portion 11 and the second skeleton portion 12 intersect. The portion surrounded by the first skeleton portion 11 and the second skeleton portion 12 is referred to as the space portion S.

As shown in FIGS. 2 and 3 (A) and 3 (B), the structure 100 includes two plate-shaped members 21 and 22. The structure 100 is configured by superimposing and joining plate-shaped members 21 and 22 to each other.

It is preferable, but not limited to, aluminum or an aluminum alloy to be used for these plate-shaped members 21 and 22. As the aluminum alloy used for the plate-shaped members 21 and 22, for example, aluminum alloys such as 5000 series, 6000 series, and 7000 series, which are referred to as JIS to AA, are used in that they have excellent strength and can be made thinner. Applies.

The plate-shaped members 21 and 22 are formed in a grid pattern by forming a hole portion 25 to be a space portion S by drilling by press molding, respectively. As a result, the plate-shaped members 21 and 22 have a vertically extending portion 27 extending in the vertical direction and a horizontally extending portion 29 extending in the horizontal direction.

Further, the plate-shaped members 21 and 22 are formed into a concave cross-sectional shape by bending the edge portion of the hole portion 25 in the same direction by drawing processing by press molding. As a result, the vertically extending portion 27 and the laterally extending portion 29 of the plate-shaped members 21 and 22 have a cross-sectional shape having a flat plate portion 31 and side plate portions 33 rising from both side edges of the flat plate portion 31. Further, in the vertically extending portion 27 and the horizontally extending portion 29, a flange portion 35 is formed by bending the edge portion of the side plate portion 33 laterally.

The plate-shaped members 21 and 22 are overlapped with each other with the open sides of the concave cross sections facing each other. Then, in the superposed state, the flange portions 35 of the vertically extending portion 27 and the horizontally extending portion 29 are joined to each other. The flange portions 35 are continuously joined along the hole portion 25. As a result, the plate-shaped members 21 and 22 are formed into a structure 100 by joining the vertically extending portion 27 and the flange portion 35 of the horizontally extending portion 29. As a method for joining the flange portions 35 to each other, a friction stir welding (FSW) using a friction stir tool 41 (see (B) in FIG. 3) is preferable.

In this structure 100, the vertically extending portion 27 and the laterally extending portion 29 that are butted against each other are referred to as a first skeleton portion 11 and a second skeleton portion 12. The first skeleton portion 11 and the second skeleton portion 12 have a closed cross section in which the flange portions 35 of the vertically extending portion 27 and the horizontally extending portion 29 are sealed by the joint portion 43. In the structure 100 including the first skeleton portion 11 and the second skeleton portion 12 having a closed cross section sealed by the joint portion 43 in this way, the internal space NS is sealed by the joint portion 43. That is, the structure 100 has an excellent sealing property of the internal space NS. The internal space NS having excellent sealing properties of the first skeleton portion 11 and the second skeleton portion 12 of the structure 100 is used, for example, as a wiring space for a cable connected to a battery or a flow path through which a cooling medium flows. Is possible.

The joining method between the flange portions 35 is not limited to the friction stirring joining method, and various types such as laser welding (Laser beam welding), MIG welding (Metal Insert Gas Welding), and TIG welding (Tungsten Inert Gas Welding) are used. Welding methods can be used. If the sealing property of the internal space NS is not required, the flange portion 35 of the vertically extending portion 27 and the horizontally extending portion 29 may be completely joined by spot welding.

As described above, according to the structure 100 according to the first embodiment, the plurality of first skeleton portions 11 and the plurality of second skeleton portions 12 are arranged orthogonally and are configured in a grid pattern. It has a plurality of space portions S surrounded by the skeleton portion 11 and the second skeleton portion 12. Thereby, for example, it can be suitably used as a frame of a battery system in which the space portion S is used as a storage space for the battery.

Further, the structure 100 can be easily manufactured by superimposing and joining two plate-shaped members 21 and 22 formed in a lattice pattern to each other. Further, since the first skeleton portion 11 and the second skeleton portion 12 have a closed cross section, excellent impact resistance can be obtained. Moreover, since it is composed of two plate-shaped members 21 and 22, the cost can be reduced and the rigidity and accuracy can be improved by reducing the number of parts as compared with a structure in which a plurality of members forming a skeleton are combined in a grid pattern. Can be done.

Further, since the structure 100 is composed of plate-shaped members 21 and 22 made of aluminum or an aluminum alloy, it is possible to reduce the weight while ensuring high strength.

Further, the lattice-shaped plate-shaped members 21 and 22 constituting the structure 100 are formed in a lattice shape by punching out the hole portion 25 which is the space portion S. That is, by the punching process, the lattice-shaped plate-shaped members 21 and 22 in which the hole portion 25 serving as the space portion S is formed can be easily manufactured.

Moreover, since the plate-shaped members 21 and 22 are formed in a concave cross-sectional shape by bending the edge portion of the hole portion 25, the strength can be increased.

Further, according to the structure 100, the first closed cross-section is formed by joining the lattice-shaped plate members 21 and 22 having a concave cross-sectional shape so as to face each other with the open sides of the concave cross-section facing each other. A structure having a skeleton portion 11 and a second skeleton portion 12 and having excellent impact resistance can be obtained.

Next, a modification of the structure 100 according to the first embodiment will be described.
The same structural parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.
FIG. 4 is a perspective view of the structure 100A according to the modified example of the first embodiment. FIG. 5 is an exploded perspective view of the structure 100A according to the modified example of the first embodiment.

As shown in FIGS. 4 and 5, the structure 100A according to the modified example includes a flat plate-shaped member 22A instead of the grid-shaped plate-shaped member 22.

The plate-shaped member 21 is overlapped with the open side of the concave cross section facing the plate-shaped member 22A. Then, in a superposed state, the vertically extending portion 27 of the plate-shaped member 21 and the flange portion 35 of the horizontally extending portion 29 are continuously joined to the plate-shaped member 22A along the hole portion 25.

In this structure 100A, the vertically extending portion 27 and the horizontally extending portion 29 of the plate-shaped member 21 joined to the flat plate-shaped member 22A are the first skeleton portion 11 and the second skeleton portion 12. The first skeleton portion 11 and the second skeleton portion 12 have a closed cross section in which the vertically extending portion 27 and the horizontally extending portion 29 are sealed by the flange portion 35.

According to this structure 100A, it can be easily manufactured by superimposing and joining the plate-shaped member 21 formed in a grid pattern and the flat plate-shaped member 22A to each other. Further, since the first skeleton portion 11 and the second skeleton portion 12 have a closed cross section, excellent impact resistance can be obtained. Moreover, since it is composed of two plate-shaped members 21 and 22A, the cost can be reduced and the rigidity and accuracy can be improved by reducing the number of parts as compared with a structure in which a plurality of members forming a skeleton are combined in a grid pattern. Can be done.

(Second Embodiment)
Next, the structure according to the second embodiment will be described.
FIG. 6 is a perspective view of the structure 200 according to the second embodiment. FIG. 7 is an exploded perspective view of the structure 200 according to the second embodiment. 8A and 8B are views showing the structure of the structure 200 according to the second embodiment, FIG. 8A is a perspective view of the first skeleton portion 51 in cross section, and FIG. 8B is a sectional view of the first skeleton portion 51. Is. FIG. 9 is a perspective view of the extruded material 71 constituting the plate-shaped member 62 made of the molded material.

As shown in FIG. 6, the structure 200 according to the second embodiment is also used as a frame constituting the vehicle-mounted battery tray. The structure 200 used as the frame of the battery tray is configured in a grid pattern having a plurality of space portions S. A battery can be accommodated in the space portion S provided in the structure 200.

In the structure 200, a plurality of first skeleton portions 51 along the vertical direction and a plurality of second skeleton portions 52 along the horizontal direction are arranged orthogonally. As a result, the structure 200 is configured in a grid pattern having a plurality of cross portions C where the first skeleton portion 51 and the second skeleton portion 52 intersect. The portion surrounded by the first skeleton portion 51 and the second skeleton portion 52 is referred to as the space portion S.

As shown in FIGS. 7 and 8 (A) and (B), the structure 200 includes two plate-shaped members 61 and 62. The structure 200 is configured by superimposing and joining the plate-shaped members 61 and 62 to each other.

It is preferable, but not limited to, aluminum or an aluminum alloy is used for these plate-shaped members 61 and 62. As the aluminum alloy used for the plate-shaped members 61 and 62, for example, aluminum alloys such as 5000 series, 6000 series, and 7000 series, which are referred to as JIS to AA, are used in that they have excellent strength and can be made thinner. Applies.

The plate-shaped member 61 is a punched plate formed in a grid pattern by forming a hole portion 65 which is a space portion S by drilling by press molding. The plate-shaped member 61 has a vertically extending portion 67 extending in the vertical direction and a horizontally extending portion 69 extending in the lateral direction.

The plate-shaped member 62 on which the plate-shaped member 61 is superposed is a molded material to which a plurality of extruded materials 71 are joined.

As shown in FIG. 9, the extruded material 71 constituting the plate-shaped member 62 has a bottom wall portion 73 and a side wall portion 75 integrally formed with the bottom wall portion 73. The bottom wall portion 73 is formed in a rectangular shape in a plan view in which the extrusion direction is the longitudinal direction. The side wall portion 75 is erected in the vicinity of both edges of the bottom wall portion 73, and extends along the longitudinal direction. On the side wall portion 75, a wide portion 77 projecting in the width direction is formed on the upper edge thereof in the longitudinal direction (see (A) and (B) in FIGS. 8).

The plate-shaped member 62 is configured by joining both side edges of a plurality of extruded materials 71 to each other. For joining these extruded materials 71 to each other, various welding methods such as friction stir welding, laser welding, MIG welding, and TIG welding can be used.

The plate-shaped member 62 formed by joining a plurality of extruded materials 71 has a recess 79 composed of a bottom wall portion 73 and a side wall portion 75 at a joint portion between the extruded materials 71.

The plate-shaped members 61 and 62 are overlapped with each other with the open side of the recess 79 of the plate-shaped member 62 facing the plate-shaped member 61 side. Then, in a superposed state, the vertically extending portion 67 of the plate-shaped member 61 and the upper edge of the side wall portion 75 of the plate-shaped member 62 are joined. The vertically extending portion 67 and the side wall portion 75 are continuously joined along their respective longitudinal directions. As a result, the plate-shaped members 61 and 62 are formed into a structure 200 by joining the vertically extending portion 67 and the side wall portion 75. As a method for joining the vertically extending portion 67 and the side wall portion 75, friction stir welding using a friction stir tool 81 (see (B) in FIG. 8) is preferable. At this time, since the wide portion 77 projecting in the width direction is provided on the upper edge of the side wall portion 75, the vertically extending portion 67 is smoothly joined to the upper edge of the side wall portion 75 by the friction stirring tool 81. Can be done.

In this structure 200, the vertically extending portion 67 and the horizontally extending portion 69 of the plate-shaped member 61 are the first skeleton portion 51 and the second skeleton portion 52. On the other hand, the first skeleton portion 51 has a closed cross section in which the vertically extending portion 67 and the recess 79 of the plate-shaped member 62 are sealed by the joint portion 83 in the longitudinal direction. In the structure 200 including the first skeleton portion 51 having a closed cross section that is closed in the longitudinal direction at the joint portion 83 in this way, the internal space NS is sealed at the joint portion 83. That is, the structure 200 has an excellent sealing property of the internal space NS. The internal space NS having excellent sealing properties of the first skeleton portion 11 of the structure 200 can be used, for example, as a wiring space for cables connected to the battery or as a flow path through which a cooling medium flows.

The joining method between the vertically extending portion 67 and the side wall portion 75 is not limited to the friction stirring joining method, and various welding methods such as laser welding, MIG welding, and TIG welding can be used. If the sealing property of the internal space NS is not required, the vertically extending portion 67 and the side wall portion 75 may be completely joined along the longitudinal direction by spot welding.

As described above, according to the structure 200 according to the second embodiment, the plurality of first skeleton portions 51 and the plurality of second skeleton portions 52 are arranged orthogonally to each other and are configured in a grid pattern. It has a plurality of space portions S surrounded by the skeleton portion 51 and the second skeleton portion 52. Thereby, for example, it can be suitably used as a frame of a battery system in which the space portion S is used as a storage space for the battery.

Further, this structure 200 can be easily manufactured by superimposing and joining a plate-shaped member 61 made of a punched plate formed in a lattice pattern and a plate-shaped member 62 made of a molded material having recesses 79 to each other. can do. Further, since the first skeleton portion 51 has a closed cross section, excellent impact resistance can be obtained. Moreover, since it is composed of two plate-shaped members 61 and 62, the cost can be reduced and the rigidity and accuracy can be improved by reducing the number of parts as compared with a structure in which a plurality of members forming a skeleton are combined in a grid pattern. Can be done.

Further, also in the case of this structure 200, since it is composed of plate-shaped members 61 and 62 made of aluminum or an aluminum alloy, it is possible to reduce the weight while ensuring high strength.

Further, the grid-shaped plate-shaped member 61 constituting the structure 200 is formed in a grid-like shape by punching out a hole portion 65 which is a space portion S. That is, the lattice-shaped plate-shaped member 61 in which the hole portion 65 serving as the space portion S is formed can be easily manufactured by the punching process.

Moreover, the plate-shaped member 62 made of a molded material can be easily manufactured by joining a plurality of extruded materials 71 in the surface direction.

In the structure 200 according to the second embodiment, as the plate-shaped member 61 made of a punched plate, as shown in FIG. 10, the edge portion of the hole portion 65, which is the space portion S, is drawn or burred. It is preferable to form the rib 87 by. By forming the rib 87 at the edge of the hole 65 in this way, the strength of the plate-shaped member 61 made of the punched plate can be increased and the overall rigidity can be improved. The rib 87 is preferably formed over the entire circumference at the edge of the hole 65 which is the space S, but may be formed intermittently at the edge of the hole 65.

As described above, the present invention is not limited to the above-described embodiment, and can be modified or applied by those skilled in the art based on the mutual combination of the configurations of the embodiments, the description of the specification, and the well-known technique. It is also a matter of the present invention to do so, and it is included in the scope of seeking protection.

As described above, the following matters are disclosed in the present specification.
(1) A plurality of first skeleton portions and a plurality of second skeleton portions are arranged orthogonally to form a lattice, and a plurality of space portions surrounded by the first skeleton portion and the second skeleton portion are formed. It is a structure that has
It has two plate-shaped members that are overlapped and joined to each other.
At least one of the two plate-shaped members is formed in a grid pattern.
A structure in which at least one of the first skeleton portion and the second skeleton portion has a closed cross section.
According to this structure, a plurality of first skeleton parts and a plurality of second skeleton parts are arranged orthogonally to form a lattice, and a plurality of spaces surrounded by the first skeleton part and the second skeleton part. Has a part. Thereby, for example, it can be suitably used as a frame of a battery system in which the space portion is used as a storage space for the battery.
This structure can be easily manufactured by superimposing and joining two plate-shaped members, one of which is formed in a grid pattern, on top of each other. Further, since at least one of the first skeleton portion and the second skeleton portion has a closed cross section, excellent impact resistance can be obtained. Moreover, since it is composed of two plate-shaped members, it is possible to reduce the cost, improve the rigidity and the accuracy by reducing the number of parts, as compared with a structure in which a plurality of members serving as a skeleton are combined in a grid pattern.

(2) The structure according to (1), wherein the plate-shaped member having a lattice shape is formed in a lattice shape by punching out a hole portion to be a space portion.
According to this structure, a lattice-shaped plate-shaped member in which a hole portion serving as a space portion is formed can be easily produced by punching.

(3) The structure according to (2), wherein the lattice-shaped plate-shaped member is formed in a concave cross-sectional shape by bending the edge portion of the hole portion.
According to this structure, since the edge portion of the hole portion of the lattice-shaped plate-shaped member is bent to form a concave cross-sectional shape, the strength of the lattice-shaped plate-shaped member can be increased.

(4) The two plate-shaped members are each formed in a grid pattern and formed in the concave cross section, and the open sides of the concave cross section are opposed to each other and are overlapped and joined to each other, and the concave cross section portion is formed. The structure according to (3), which has the closed cross section.
According to this structure, lattice-shaped plate-shaped members having a concave cross-sectional shape are joined by superimposing and joining each other with the open sides of the concave cross-section facing each other, thereby having an impact-resistant portion having a skeleton portion having a closed cross-section. It can be a structure having excellent properties.

(5) The two plate-shaped members are
One of them is a punched plate formed in a grid pattern by punching a hole portion which is a space portion.
The structure according to (1), wherein the other is made of a molding material having a recess forming the closed cross section by being superposed on the punched plate.
According to this structure, the recesses of the molded material are closed by the punched plate to form a closed cross section by superimposing and joining the punched plate formed in a grid pattern and the molding material having the recesses. It can be a structure having a skeleton portion and having excellent impact resistance.

(6) The structure according to (5), wherein the molded material is formed by joining a plurality of extruded materials in the plane direction.
According to this structure, by joining a plurality of extruded materials in the plane direction, it is possible to easily produce a molded material to be joined to the punched plate.

(7) The structure according to (6), wherein the extruded material has a bottom wall portion and a side wall portion, and has a wide portion on the upper edge of the side wall portion.
According to this structure, the vertically extending portion can be smoothly joined to the upper edge of the side wall portion by the friction stirring tool.

(8) The structure according to any one of (5) to (7), wherein ribs are formed on the punched plate at the edge of the hole portion serving as the space portion.
According to this structure, since the rib is formed at the edge of the hole portion that becomes the space portion in the punched plate, the strength of the punched plate can be increased and the overall rigidity can be improved.

(9) The structure according to any one of (1) to (8), wherein the plate-shaped member is made of aluminum or an aluminum alloy.
According to this structure, since it is composed of a plate-shaped member made of aluminum or an aluminum alloy, it is possible to reduce the weight while ensuring high strength.

11,51 1st skeleton part 12,52 2nd skeleton part 21,22,22A, 61,62 Plate-shaped member 25,65 Hole part 71 Extruded material 79 Recessed 87 Rib 100, 100A, 200 Structure S Space part

Claims (9)

A structure in which a plurality of first skeleton portions and a plurality of second skeleton portions are arranged orthogonally to form a lattice, and have a plurality of space portions surrounded by the first skeleton portion and the second skeleton portion. It ’s a body,
It has two plate-shaped members that are overlapped and joined to each other.
At least one of the two plate-shaped members is formed in a grid pattern.
At least one of the first skeleton portion and the second skeleton portion has a closed cross section.
Structure. The plate-shaped member having a lattice shape is formed in a lattice shape by punching out a hole portion to be a space portion.
The structure according to claim 1. In the lattice-shaped plate-shaped member, the edge portion of the hole portion is bent to form a concave cross-sectional shape.
The structure according to claim 2. The two plate-shaped members are each formed in a grid pattern and formed in the concave cross section, and the open sides of the concave cross section are opposed to each other and joined to each other, and the concave cross section portion is the closed cross section. Is said to be
The structure according to claim 3. The two plate-shaped members are
One of them is a punched plate formed in a grid pattern by punching a hole portion which is a space portion.
The other is made of a molding material having a recess forming the closed cross section by being superposed on the punched plate.
The structure according to claim 1. The molded material is configured by joining a plurality of extruded materials in the plane direction.
The structure according to claim 5. The extruded material has a bottom wall portion and a side wall portion, and has a wide portion on the upper edge of the side wall portion.
The structure according to claim 6. The punched plate has ribs formed at the edges of the holes that serve as the spaces.
The structure according to any one of claims 5 to 7. The plate-shaped member is made of aluminum or an aluminum alloy.
The structure according to any one of claims 1 to 8.

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