Vehicle frame structure

Abstract

The objective is to obtain a vehicle frame structure that allows the frame members to deform locally even when a collision load is applied to a location where no cross members are present. [Solution] The vehicle frame structure has a frame member 12 comprising a hollow main body portion 40 provided at the end in the vehicle width direction and extending in the vehicle front-rear direction, and partition portions 50 and 52 provided inside the main body portion 40 and dividing the internal space of the main body portion vertically. The partition portions 50 and 52 of the frame member 12 connect the outer wall located on the outside in the vehicle width direction of the main body portion 40 and the inner wall located on the inside in the vehicle width direction, and the thickness in the vehicle vertical direction is formed to be thicker on the inside in the vehicle width direction than on the outside in the vehicle width direction.

Description

Technical Field

[0001] The present invention relates to a vehicle skeleton structure.

Background Art

[0002] Patent Document 1 discloses a reinforcing structure for a skeleton frame including a side sill that constitutes a skeleton frame of a vehicle. Specifically, the side sill (skeleton member) described in Patent Document 1 includes a hollow outer member and a reinforcement disposed inside the outer member, and by increasing the rigidity inside rather than outside the reinforcement, the reinforcing effect of the side sill is enhanced.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the structure disclosed in Patent Document 1, since it is a structure that deforms the outside of the side sill (skeleton member) between the cross member and the barrier during a side collision of the vehicle, when a collision load is input at a position where the cross member is not arranged, the skeleton member may locally deform without being able to sufficiently absorb the collision load.

[0005] An object of the present invention is to obtain a vehicle skeleton structure that can prevent the skeleton member from locally deforming even when a collision load is input at a position where the cross member is not arranged.

Means for Solving the Problems

[0006] The vehicle frame structure according to claim 1 has a frame member comprising a hollow main body portion provided at the end in the vehicle width direction and extending in the vehicle longitudinal direction, and a partition portion provided inside the main body portion and dividing the internal space of the main body portion vertically, wherein the partition portion of the frame member connects an outer wall located on the outside in the vehicle width direction of the main body portion and an inner wall located on the inside in the vehicle width direction, and the thickness in the vehicle vertical direction is greater on the inside in the vehicle width direction than on the outside in the vehicle width direction.

[0007] The vehicle frame structure according to claim 1 has a frame member comprising a hollow main body and a partition, the main body being provided at the end in the vehicle width direction and extending in the vehicle longitudinal direction. The partition is provided inside the main body, and this partition divides the internal space of the main body vertically. Here, the partition connects the outer wall located on the outside in the vehicle width direction of the main body and the inner wall located on the inside in the vehicle width direction in the vehicle width direction. As a result, the collision load applied to the outer wall during a side collision of the vehicle is transmitted to the inner wall via the partition. Furthermore, since the partition is formed with a greater thickness in the vehicle vertical direction on the inside in the vehicle width direction than on the outside in the vehicle width direction, the relatively thinner outer side in the vehicle width direction can be crushed and absorb collision energy. On the other hand, the thicker inner side in the vehicle width direction of the partition can be bent without being crushed, thereby suppressing local deformation of the frame member.

[0008] The vehicle frame structure according to claim 2 is configured in claim 1, wherein the compartment includes an upper compartment wall located on the upper part of the main body and a lower compartment wall located on the lower part of the main body, and the upper compartment wall and the lower compartment wall are provided with a change portion in which the thickness changes outward in the vehicle width direction from the center in the vehicle width direction, and the change portion of the upper compartment wall and the change portion of the lower compartment wall are connected by a vertical connecting wall that extends in the vertical direction of the vehicle.

[0009] In the vehicle frame structure according to claim 2, the compartment is composed of an upper compartment wall and a lower compartment wall. The upper and lower compartment walls are provided with a section where the thickness changes from the center in the vehicle width direction outward in the vehicle width direction, and the section of the upper compartment wall and the section of the lower compartment wall are connected by a longitudinal connecting wall that extends in the vertical direction of the vehicle. This allows the area up to the section of change to be effectively compressed to absorb collision energy, while connecting the sections of change with the longitudinal connecting wall allows the collision load to be distributed in the area inward in the vehicle width direction from the section of change.

[0010] The vehicle frame structure according to claim 3 is as described in claim 2, wherein the frame members are provided on both sides of the vehicle in the vehicle width direction, one frame member and the other frame member are connected by a cross member extending in the vehicle width direction, and the ridge of the cross member is at the same height as the upper partition wall.

[0011] In the vehicle frame structure according to claim 3, a frame member on one side in the vehicle width direction and a frame member on the other side in the vehicle width direction are connected by a cross member. Furthermore, since the ridge of the cross member is set at the same height as the upper compartment wall, the collision load applied to the frame member during a side collision is transmitted to the ridge of the cross member through the upper compartment wall. As a result, the collision load can be effectively transmitted to the side not involved in the collision, and deformation of the vehicle body can be suppressed.

[0012] The vehicle frame structure according to claim 4 is as described in claim 3, wherein the lower end of the cross member is attached to a battery case housing a battery, and the lower end of the cross member and the lower partition wall are positioned at the same height.

[0013] In the vehicle frame structure according to claim 4, since the lower end of the cross member is attached to the battery case, the upper surface of the battery case is used as a floor panel, and a larger battery mounting space can be secured compared to a structure with a dedicated floor panel. In addition, since the lower end of the cross member and the lower compartment wall are at the same height, the collision load is transmitted to the lower end of the cross member through the lower compartment wall.

[0014] The vehicle frame structure according to claim 5 is as described in claim 4, wherein the frame member has fastening holes formed therein, and the fastening holes are provided further inward in the vehicle width direction than the vertical connecting wall.

[0015] In the vehicle frame structure according to claim 5, the fastening holes are provided further inward in the vehicle width direction than the longitudinal connecting wall, thereby protecting the fastening portion between the frame member and the battery case during a side collision. [Effects of the Invention]

[0016] As described above, according to the vehicle frame structure of the present invention, even when a collision load is applied to a position where no cross members are located, the frame members can deform locally. [Brief explanation of the drawing]

[0017] [Figure 1] This is a schematic plan view showing the frame of a vehicle to which the vehicle frame structure according to the first embodiment is applied. [Figure 2] This is an enlarged cross-sectional view showing the state after cutting along line 2-2 in Figure 1. [Figure 3] Figure 2 is an enlarged cross-sectional view of the main part of the rocker. [Modes for carrying out the invention]

[0018] A vehicle frame structure according to an embodiment will be described with reference to the drawings.

[0019] Figure 1 is a schematic plan view showing the frame of a vehicle 10 to which the vehicle frame structure according to the embodiment is applied. Arrows FR, UP, and RH in the figure indicate the front, top, and right directions of the vehicle 10, respectively. In the following description, unless otherwise specified, the front, back, up, down, and left directions refer to the front, back, up, and down directions of the vehicle, respectively.

[0020] As shown in FIG. 1, the vehicle 10 of the present embodiment includes a rocker 12 as a pair of left and right skeletal members. The rocker 12 is provided on both sides in the vehicle width direction of the vehicle 10 and extends in the vehicle front-rear direction respectively.

[0021] A battery case 14 is disposed between the left and right rockers 12. The battery case 14 is a case that protects a battery BT (see FIG. 2) housed therein. Details of the battery case 14 will be described later.

[0022] A cross member 16 is provided on the upper surface of the battery case 14. In the present embodiment, as an example, two cross members 16 are arranged in the front and rear and extend in the vehicle width direction respectively. A seat (not shown) constituting the driver's seat and the front passenger seat etc. is attached to the cross member 16.

[0023] FIG. 2 is an enlarged cross-sectional view showing an enlarged state of the cut along the line 2-2 of FIG. 1. As shown in this FIG. 2, the battery case 14 is disposed under the floor of the vehicle 10 and is configured to include a case lower 20 and a case upper 22.

[0024] The case lower 20 is formed in a substantially hat-shaped cross section that is open to the upper side of the vehicle when viewed from the vehicle front-rear direction, and lower side flanges 20A are formed at both ends in the vehicle width direction of the case lower 20. Further, the case upper 22 is formed in a substantially hat-shaped cross section that is open to the lower side of the vehicle when viewed from the vehicle front-rear direction, and upper side flanges 22A are formed at both ends in the vehicle width direction of the case upper 22. And the lower side flange 20A and the upper side flange 22A are fastened by bolts 24 in a superposed state. The bolt 24 is screwed into a nut 26 provided on a first energy absorption member 36 constituting the rocker 12.

[0025] The battery BT is housed in the battery case 14. The battery BT is configured to be able to supply electric power to a drive source of the vehicle 10 such as a motor (not shown).

[0026] A cross member 16 is provided above the case upper 22 of the battery case 14. The cross member 16 has a roughly hat-shaped cross section, with its cross section, viewed from the vehicle width direction, opening towards the lower side of the vehicle, and flanges 16A are formed at the front and rear ends of the cross member 16.

[0027] The flange 16A of the cross member 16 is superimposed on the case upper 22 of the battery case 14 and fastened to the battery case 14 by stud bolts 28 and nuts 30. The fastening locations between the cross member 16 and the battery case 14 are not particularly limited, but for example, they are fastened at four equally spaced locations along the vehicle width direction.

[0028] Next, we will describe the details of the rocker 12, which is the main component of the present invention.

[0029] The rocker 12 is mainly composed of a first energy absorbing member 36 and a second energy absorbing member 38. The rocker 12 is also composed of an outer shell consisting of a rocker inner panel and a rocker outer panel (not shown), and the first energy absorbing member 36 and the second energy absorbing member 38 are arranged within a closed cross-section formed by the rocker inner panel and the rocker outer panel.

[0030] The first energy absorbing member 36 is positioned on the inside of the rocker 12 in the vehicle width direction and has a hollow main body portion 40. The main body portion 40 and the cross member 16 are fastened together via a bracket 44. Although not shown in the figures, the other rocker is similarly fastened to the cross member 16 via a bracket, so that one rocker 12 and the other rocker are connected by the cross member.

[0031] In this embodiment, the bracket 44 is formed in a substantially crank shape when viewed from the front-rear direction of the vehicle, and the inner side of the bracket 44 in the vehicle width direction is fastened to the upper surface of the cross member 16 by fastening means (not shown) while overlapping with it. The outer side of the bracket 44 in the vehicle width direction is fastened to the upper surface of the main body portion 40 by bolts 46 while overlapping with it.

[0032] Figure 3 is an enlarged cross-sectional view of the main part of the rocker shown in Figure 2. As shown in Figure 3, the upper surface of the main body 40 is an inclined wall 40A that slopes downward from the outside in the vehicle width direction to the inside in the vehicle width direction.

[0033] Furthermore, a stepped portion 40B is formed on the inner side wall of the main body 40 in the vehicle width direction, and the upper side of the stepped portion 40B is located further inward in the vehicle width direction than the lower side. In other words, the inner side wall of the main body 40 in the vehicle width direction is formed in a shape with a notch at the bottom.

[0034] The main body 40 is provided with an upper partition wall 50, a lower partition wall 52, an outer vertical connecting wall 54, and an inner vertical connecting wall 56. The partition section of the present invention is formed by including the upper partition wall 50 and the lower partition wall 52.

[0035] The upper partition wall 50 is located on the upper part of the main body 40 and extends in the vehicle width direction, connecting the outer wall located on the outside in the vehicle width direction of the main body 40 with the inner wall located on the inside in the vehicle width direction. The upper partition wall 50 divides the internal space of the main body 40 vertically. The lower partition wall 52 is located below the upper partition wall 50 and extends in the vehicle width direction. The lower partition wall 52 also divides the internal space of the main body 40 vertically.

[0036] Here, the upper partition wall 50 is formed with a greater thickness in the vehicle-vertical direction on the inside of the vehicle-width direction than on the outside of the vehicle-width direction. Specifically, in the upper partition wall 50, an upper variation section 50A is formed on the outside of the vehicle-width direction from the center of the vehicle-width direction, where the thickness changes. In this embodiment, as an example, the thickness on the right side of the upper partition wall 50 is set to be one-third or less of the thickness on the left side, with the upper variation section 50A as the boundary.

[0037] Similar to the upper partition wall 50, the lower partition wall 52 is formed with a greater thickness in the vehicle-vertical direction on the inside of the vehicle-width direction than on the outside of the vehicle-width direction. Specifically, in the lower partition wall 52, a lower variation section 52A is formed on the outside of the vehicle-width direction from the center of the vehicle-width direction, where the thickness changes. In this embodiment, as an example, the thickness on the right side of the lower partition wall 52 is set to be less than one-third of the thickness on the left side, with the lower variation section 52A as the boundary. Also, in this embodiment, the upper variation section 50A and the lower variation section 52A are formed in a position where they overlap when viewed from the vehicle-vertical direction.

[0038] The upper section 50A and the lower section 52A are connected in the vertical direction of the vehicle by an outer vertical connecting wall 54. The outer vertical connecting wall 54 extends almost vertically, and its thickness is greater than the thin section of the upper section wall 50, but thinner than the thick section.

[0039] An inner longitudinal connecting wall 56 is provided on the side of the vehicle width direction that is inward from the outer longitudinal connecting wall 54. The inner longitudinal connecting wall 56 extends in the vehicle vertical direction, approximately parallel to the outer longitudinal connecting wall 54, and has a thickness similar to that of the outer longitudinal connecting wall 54. The inner longitudinal connecting wall 56 divides the space enclosed by the upper compartment wall 50, the lower compartment wall 52, the outer longitudinal connecting wall 54, and the main body 40 into two equal parts, left and right.

[0040] As described above, the upper part of the main body 40 is enclosed by the main body 40 and the upper partition wall 50, and the lower part of the main body 40 is enclosed by the main body 40 and the lower partition wall 52. In addition, the right side of the main body 40 is enclosed by the main body 40, the upper partition wall 50 and the lower partition wall 52.

[0041] A second energy absorbing member 38 with a closed cross-sectional structure is provided on the outer side in the vehicle width direction from the main body 40. The second energy absorbing member 38 comprises a hollow main body 38A and an upper and lower partition wall 38B that divides the internal space of the main body 38A vertically and has a central portion in the vehicle width direction that curves upward or downward. In this embodiment, as an example, the upper and lower partition wall 38B is provided in the central portion in the vertical direction of the second energy absorbing member 38, and its central portion in the vehicle width direction is curved upward.

[0042] Here, the upper wall of the second energy absorbing member 38 is positioned to overlap with the upper partition wall 50 of the first energy absorbing member 36 when viewed from the vehicle width direction, and the lower wall of the second energy absorbing member 38 is positioned to overlap with the lower partition wall 52 of the first energy absorbing member 36 when viewed from the vehicle width direction.

[0043] As shown in Figure 2, the upper ridge of the cross member 16 and the upper partition wall 50 of the first energy absorbing member 36 are at the same height. In other words, they are positioned so that the ridge of the cross member 16 and the upper partition wall 50 overlap when viewed from the vehicle width direction. The ridge of the cross member 16 referred to here is the portion between the upper surface and the front surface of the cross member 16, and the portion between the upper surface and the rear surface of the cross member 16.

[0044] Furthermore, the flange 16A at the lower end of the cross member 16 and the lower partition wall 52 of the first energy absorbing member 36 are positioned at the same height. In other words, they are positioned so that the lower end of the cross member 16 and the lower partition wall 52 overlap when viewed from the vehicle width direction.

[0045] Furthermore, the outer vertical connecting wall 54 is provided on the outside in the vehicle width direction with respect to the center line CL of the fastening portion between the battery case 14 and the first energy absorbing member 36. In other words, the fastening holes for fastening the battery case 14 and the rocker 12 are provided on the inside in the vehicle width direction relative to the outer vertical connecting wall 54.

[0046] (action) Next, the operation of the vehicle frame structure according to this embodiment will be explained.

[0047] In the vehicle 10 to which the vehicle frame structure according to this embodiment is applied, there is a rocker 12 comprising a hollow main body 40 and partitions (upper partition wall 50, lower partition wall 52). The main body 40 is provided at the end in the vehicle width direction and extends in the vehicle longitudinal direction. The upper partition wall 50 and the lower partition wall 52, which are partitions, are provided inside the main body 40, and the internal space of the main body 40 is divided vertically by these upper and lower partition walls 50 and 52. Here, the upper partition wall 50 connects the outer wall located on the outside in the vehicle width direction of the main body 40 to the inner wall located on the inside in the vehicle width direction. As a result, the collision load applied to the outer wall during a side collision of the vehicle 10 is transmitted to the inner wall via the upper partition wall 50. Similarly, the lower partition wall 52 connects the outer wall located on the outside in the vehicle width direction of the main body 40 to the inner wall located on the inside in the vehicle width direction. As a result, the collision load applied to the outer wall during a side collision of the vehicle 10 is transmitted to the inner wall via the lower compartment wall 52.

[0048] Furthermore, since the upper compartment wall 50 and the lower compartment wall 52 are formed with a greater thickness in the vehicle-vertical direction on the inner side in the vehicle-width direction than on the outer side in the vehicle-width direction, the relatively thinner outer side in the vehicle-width direction can collapse and absorb collision energy. On the other hand, the thicker inner side of the upper compartment wall 50 and the lower compartment wall 52 can be bent instead of collapsing, thereby suppressing local deformation of the rocker 12.

[0049] Furthermore, in this embodiment, as shown in Figure 3, the upper partition wall 50 is provided with an upper variable portion 50A in which the thickness changes from the center in the vehicle width direction to the outside in the vehicle width direction, and the lower partition wall 52 is provided with a lower variable portion 52A in which the thickness changes from the center in the vehicle width direction to the outside in the vehicle width direction. The upper variable portion 50A and the lower variable portion 52A are connected by an outer vertical connecting wall 54 that extends in the vertical direction of the vehicle. This allows the areas up to the upper variable portion 50A and the lower variable portion 52A to be effectively compressed to absorb collision energy, while the collision load can be distributed by connecting the upper variable portion 50A and the lower variable portion 52A with the outer vertical connecting wall 54.

[0050] Furthermore, in this embodiment, as shown in Figure 1, the rocker 12 on one side in the vehicle width direction and the rocker 12 on the other side in the vehicle width direction are connected by a cross member 16. Also, as shown in Figure 2, since the ridge of the cross member 16 is at the same height as the upper partition wall 50 of the second energy absorbing member 36, the collision load input to the second energy absorbing member 36 during a side collision is transmitted to the ridge of the cross member 16 through the upper partition wall 50. As a result, the collision load can be effectively transmitted to the non-collision side, and deformation of the vehicle body can be suppressed.

[0051] Furthermore, in this embodiment, since the lower end of the cross member 16 is attached to the battery case 14, the upper surface of the battery case 14 is used as a floor panel, and a larger space for mounting the battery BT can be secured compared to a structure with a dedicated floor panel. Also, since the lower end of the cross member 16 and the lower partition wall 52 of the second energy absorbing member 36 are at the same height, the collision load is transmitted to the lower end of the cross member 16 through the lower partition wall 52.

[0052] Furthermore, in this embodiment, the fastening holes (fastening portions) for fastening the second energy absorbing member 36 (rocker 12) to the battery case 14 are provided further inward in the vehicle width direction than the outer vertical connecting wall 54, thus protecting the fastening portion between the rocker 12 and the battery case 14 during a side collision.

[0053] Furthermore, in this embodiment, a second energy absorbing member 38 with a closed cross-sectional structure is provided on the outer side in the vehicle width direction from the main body 40. The second energy absorbing member 38 has upper and lower partition walls 38B that divide the internal space vertically and whose central part in the vehicle width direction is curved upward or downward. As a result, in the event of a side collision, the second energy absorbing member 38 is sandwiched between the barrier and the second energy absorbing member 36, and the upper and lower partition walls 38B bend and deform upward, so that a portion of the collision energy can be absorbed before the barrier enters the second energy absorbing member 36.

[0054] Furthermore, in this embodiment, as shown in Figure 3, the upper surface of the main body 40 is an inclined wall 40A that slopes downward from the outside in the vehicle width direction to the inside in the vehicle width direction. Compared to a structure in which the upper surface of the main body 40 extends substantially horizontally, it is easier to transmit the collision load to the cross member 16. This allows for effective transmission of the collision load to the side opposite to the collision.

[0055] The vehicle frame structure according to the present invention has been described above, but it goes without saying that it can be implemented in various forms without departing from the spirit of the invention. For example, in this embodiment, the rocker 12 is configured by including a first energy absorbing member 36 and a second energy absorbing member 38, but it is not limited to this, and a configuration comprising only the first energy absorbing member 36 is also possible.

[0056] Furthermore, in this embodiment, the first energy absorbing member 36 includes an outer vertical connecting wall 54 and an inner vertical connecting wall 56, but it is not limited to this, and a structure including only the outer vertical connecting wall 54 is also possible.

[0057] Furthermore, in this embodiment, the main body 40 of the first energy absorbing member 36 has a stepped portion 40B, but the embodiment is not limited to this, and a structure without a stepped portion 40B is also possible. Moreover, in this embodiment, the battery case 14 is provided under the floor of the vehicle 10, but the embodiment is not limited to this. For example, it may be applied to a vehicle that does not have a battery.

[0058] The following additional information is disclosed regarding the above embodiment.

[0059] (Note 1) A hollow main body portion is provided at the end in the width direction of the vehicle and extends in the front-rear direction of the vehicle, A partition section is provided inside the main body and divides the internal space of the main body vertically, It has a skeletal structure, The partition portion in the skeletal member connects an outer wall located on the outside in the vehicle width direction of the main body and an inner wall located on the inside in the vehicle width direction in the vehicle width direction, and the thickness in the vehicle vertical direction is greater on the inside in the vehicle width direction than on the outside in the vehicle width direction, thus forming a vehicle skeletal structure. (Note 2) The partitioned section is composed of an upper partitioned wall located at the top of the main body and a lower partitioned wall located at the bottom of the main body. The upper and lower partition walls are provided with a section where the thickness changes from the center in the vehicle width direction to the outer side in the vehicle width direction. The vehicle frame structure according to Appendix 1, wherein the modified portion of the upper partition wall and the modified portion of the lower partition wall are connected by a longitudinal connecting wall that extends in the vertical direction of the vehicle. (Note 3) The aforementioned skeletal members are provided on both sides of the vehicle in the vehicle width direction, One of the aforementioned structural members and the other aforementioned structural member are connected by a cross member that extends in the vehicle width direction. The vehicle frame structure as described in Appendix 2, wherein the ridge of the cross member is provided at the same height as the upper partition wall. (Note 4) The lower end of the cross member is attached to the battery case that houses the battery. The vehicle frame structure described in Appendix 3, wherein the lower end of the cross member and the lower partition wall are positioned at the same height. (Note 5) The frame member has fastening holes formed therein, into which the battery case is fastened. The vehicle frame structure as described in Appendix 4, wherein the fastening holes are provided inward in the vehicle width direction from the longitudinal connecting wall. (Note 6) An energy-absorbing member with a closed cross-sectional structure is provided on the outer side in the vehicle width direction from the main body mentioned above. The energy absorbing member comprises an upper and lower partition wall that divides the internal space vertically and whose central portion in the vehicle width direction is curved upward or downward, as described in any one of Appendix 1 to Appendix 5. (Note 7) The vehicle frame structure described in any one of the appendices 1 to 6, wherein the upper surface of the main body is inclined downward from the outside in the vehicle width direction toward the inside in the vehicle width direction. [Explanation of Symbols]

[0060] 12. Rocker (framework member) 14 Battery Case 16 Crossmember 40 Main body 50 Upper partition wall (partition section) 50A Upper change section 52 Lower partition wall (partition section) 52A Lower change section 54 Outer vertical connecting wall BT Battery

Claims

1. A hollow main body portion is provided at the end in the width direction of the vehicle and extends in the front-rear direction of the vehicle, A partition section is provided inside the main body and divides the internal space of the main body vertically, It has a skeletal structure, The partition portion in the skeletal member connects an outer wall located on the outside in the vehicle width direction of the main body and an inner wall located on the inside in the vehicle width direction in the vehicle width direction, and the thickness in the vehicle vertical direction is greater on the inside in the vehicle width direction than on the outside in the vehicle width direction, thus forming a vehicle skeletal structure.

2. The partitioned section is composed of an upper partitioned wall located at the top of the main body and a lower partitioned wall located at the bottom of the main body. The upper and lower partition walls are provided with a section where the thickness changes from the center in the vehicle width direction to the outer side in the vehicle width direction. The vehicle frame structure according to claim 1, wherein the modified portion of the upper partition wall and the modified portion of the lower partition wall are connected by a vertical connecting wall extending in the vertical direction of the vehicle.

3. The aforementioned skeletal members are provided on both sides of the vehicle in the vehicle width direction, One of the aforementioned structural members and the other aforementioned structural member are connected by a cross member that extends in the vehicle width direction. The vehicle frame structure according to claim 2, wherein the ridge of the cross member is provided at the same height as the upper partition wall.

4. The lower end of the cross member is attached to the battery case that houses the battery. The vehicle frame structure according to claim 3, wherein the lower end of the cross member and the lower partition wall are positioned at the same height.

5. The frame member has fastening holes formed therein, into which the battery case is fastened. The vehicle frame structure according to claim 4, wherein the fastening holes are provided further inward in the vehicle width direction than the vertical connecting wall.

Images