JP6987482B2 - Vehicle structure - Google Patents

Description

The present invention relates to a vehicle structure capable of suitably protecting a power storage device such as a battery mounted on a vehicle in the event of a vehicle collision.

As a specific example of the vehicle structure, there is one described in Patent Document 1.
In the vehicle structure described in the same document, a rear seat is arranged at a position where a step portion is formed on the floor of the vehicle interior, and a large-sized lithium ion secondary battery or the like is provided in the lower region of the rear seat. Battery (power storage device) is installed. The battery is covered with a turret-like structure as a protective member for the battery that also serves as a seat cushion frame for the rear seat.
According to such a configuration, the battery can be mounted in the vehicle interior in a space-efficient manner and can be protected by the turret-shaped structure.

However, in the above-mentioned prior art, there is still room for improvement as described below.

That is, when the battery is provided in the substantially central portion of the floor of the vehicle in the front-rear direction of the vehicle or a portion closer to the rear of the vehicle than that, it is desired to enhance the battery protection performance when the vehicle has a rear collision. .. On the other hand, in the above-mentioned prior art, a means for increasing the rigidity of each peripheral part of the battery is adopted by using a turret-shaped structure or the like, but the battery is provided only by such a means for increasing the rigidity of each part. Sufficient protection will result in increased weight and increased manufacturing costs. Therefore, there is room for improvement in this respect.

Japanese Unexamined Patent Publication No. 2011-126439

The present invention has been conceived under the above-mentioned circumstances, and while preventing or suppressing problems such as an increase in weight and an increase in manufacturing cost, storage of a battery or the like at the time of a rear collision of a vehicle is stored. The challenge is to provide a vehicle structure that can enhance the protection performance of the device.

In order to solve the above problems, the following technical means are taken in the present invention.

The vehicle structure provided by the present invention includes a step portion provided in a substantially central portion in the front-rear direction of the vehicle or a portion closer to the rear of the vehicle in the floor portion of the vehicle, and the step portion in the floor portion. The power storage device mounted on the vehicle is joined to a portion of the floor portion on the outer side in the vehicle width direction from the mounting area of the power storage device and extends in the front-rear direction of the vehicle, and is located at the rear portion of a substantially horizontal horizontal portion. A vehicle structure comprising a pair of left and right side members having a rearwardly rising inclined portion connected via a bent portion, wherein the vehicle causes a rear collision and a predetermined position to the rear portion of the vehicle. When the above load input is received, the floor portion can be bent starting from the portion of the floor portion on the front side of the vehicle with respect to the mounting area of the power storage device, and the power storage device can be rotated backward. The rigidity break point is further provided, and the rigidity break point is set at a position on the front side of the vehicle with respect to the rearward rising inclined portion among the side members, and the rearward rising inclined portion is provided. When the load is input to the rear portion, the rear rising inclined portion can rotate in a rear rising shape with the rigidity break point as a starting point so as to accompany the mounting area of the power storage device on the floor portion. The rear rising inclined portion of each side member is provided in an arrangement that overlaps with the front portion of the power storage device in the vehicle front-rear direction, and the rear portion of the rear rising inclined portion is the power storage device. It is characterized by being located above and behind the vehicle.

With such a configuration, the following effects can be obtained.
That is, when the vehicle causes a rear collision and a load input of a predetermined value or more is applied to the rear portion of the vehicle, the floor portion is bent from the portion on the front side of the vehicle with respect to the mounting area of the power storage device due to the existence of the rigidity break point. It is possible to rotate the power storage device in an upward-sloping manner. By rotating the power storage device in this way, the direct load input to the power storage device is reduced, and damage to the power storage device can be effectively prevented or suppressed.
The present invention is a means for providing a rigid breaking point (fragile portion, etc.) to control deformation and displacement of the power storage device at the time of load input, instead of increasing the rigidity of each peripheral part of the power storage device so as not to cause deformation. Therefore, it is possible to suppress the increase in weight, improve the productivity, and appropriately reduce the manufacturing cost.

In the present invention, preferably, a cross member is further provided on the floor portion, which is located on the vehicle front side of the mounting area of the power storage device and extends in the vehicle width direction, and the cross member has a vertical height. It has an upright wall portion that stands upright in the direction and whose lower portion is in contact with the floor portion and is joined. In a range wider than the width in the vehicle width direction, there are no uneven steps in the vertical and front-rear directions of the vehicle, and the configuration extends linearly in the vehicle width direction.

With such a configuration, the following effects can be obtained.
That is, when the vehicle causes a side collision, the cross member receives the side collision load from the outside in the vehicle width direction. Here, if the contact joint between the upright wall portion and the floor portion of the cross member has no uneven steps in the vertical and front-rear directions of the vehicle and is configured to extend linearly in the vehicle width direction, this is not the case. Compared with the configuration, it is possible to make it less likely to be deformed with respect to the input of the lateral thrust load (when the member receives a load in the longitudinal direction thereof, the more uneven steps and bent portions are present in this member, the more The member is prone to bending deformation). Therefore, it is possible to effectively prevent the lateral collision load from being input to the power storage device at the time of the lateral collision of the vehicle.
Further, it is possible to effectively set a rigidity break point on the vehicle front side of the cross member described above.

In the present invention, preferably, a floor tunnel portion provided on the floor portion and extending in the vehicle front-rear direction is further provided, and the rear end portion of the floor tunnel portion is a mounting area of the power storage device in the vehicle front-rear direction. And, it is arranged so as to be separated from the step portion on the front side of the vehicle.

According to such a configuration, the rigidity break point can be appropriately set at the position between the mounting area and the step portion of the power storage device and the rear end portion of the floor tunnel portion, and the rigidity break point can be appropriately set at the time of the rear collision of the vehicle. In the above, it becomes more preferable in order to ensure the operation of the power storage device to rotate in a backward rising manner.
The floor tunnel portion also helps to secure rigidity during normal driving.

In the present invention, preferably, the rear end portion of the floor tunnel portion is further provided with a brace for connecting the rear end portion of the floor tunnel portion in a bridging manner to any of the fixed vehicle member of the mounting area of the power storage device and the step portion.

With such a configuration, the following effects can be obtained.
That is, if the size of the floor tunnel portion in the front-rear direction of the vehicle is shortened and the rear end portion of the floor tunnel portion is separated from the mounting area of the power storage device and the step portion, the size is increased accordingly.
The rigidity of the peripheral part is reduced. On the other hand, the brace compensates for such a decrease in rigidity and helps to secure sufficient rigidity.
Further, according to the specifications of the brace, it is possible to control the rotational operation of the power storage device at the time of the rear collision of the vehicle.
More preferably, a gap is provided between the brace and the floor portion located below the brace. According to such a configuration, the floor portion can rise relative to the brace at the time of the rear collision of the vehicle, so that the bending of the floor portion (the rearward rotation of the power storage device) is not significantly hindered by the brace. It is possible to do so.

In the present invention, preferably, a pair of left and right inner members which are joined to the lower surface side of a pair of left and right base ends of a floor tunnel portion provided on the floor portion and extend in the front-rear direction of the vehicle and which extend in the front-rear direction of the vehicle are further provided. The rear end portions of the pair of inner members are arranged so as to be separated from the mounting area of the power storage device and the step portion on the front side of the vehicle in the front-rear direction of the vehicle.

According to such a configuration, the presence of the pair of inner members not only secures the rigidity of the vehicle during normal running, but also when the vehicle collides forward and a load is input from the front of the vehicle. This load can be received not only by the floor tunnel portion but also by a pair of inner members to absorb impact energy. Therefore, the power storage device protection performance at the time of a front collision of the vehicle can be improved.
On the other hand, in the case of a rear collision of the vehicle, the floor portion can be appropriately bent at the position between the mounting area of the power storage device and the step portion and each inner member. That is, it is possible to prevent each inner member from significantly hindering the bending operation of the floor portion at the time of a rear collision of the vehicle.

Other features and advantages of the invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

FIG. 3 is a schematic perspective view of a partially broken portion showing an example of a vehicle structure according to the present invention. FIG. 3 is a schematic perspective view of a partially broken portion showing a state in which a battery or the like of the vehicle structure shown in FIG. 1 is not attached. It is a side sectional view of the main part at the position of the side member of the vehicle structure shown in FIG. (A) is a sectional view taken along the line IVa-IVa of FIG. 1, and FIG. 1B is a sectional view taken along the line IVb-IVb of FIG. It is the schematic bottom view of the main part of FIG. FIG. 6 is a sectional view taken along line VI-VI of FIG. FIG. 3 is an enlarged side sectional view of a main part of FIG. (A) is a cross-sectional perspective view of a main part of the portion shown in FIG. 7, and (b) is an exploded cross-sectional view of the main part of (a). It is a schematic plan view of the main part of the part shown in FIG. 7.

Hereinafter, preferred embodiments of the present invention will be specifically described with reference to the drawings.

The vehicle structure A shown in FIG. 1 is applied to a vehicle such as a hybrid vehicle, and has a step portion 10 provided on the floor portion 1 of the vehicle, a battery 2 as a power storage device mounted on the step portion 10, and the like. It includes a turret-shaped structure 3, a cross member 4, a floor tunnel portion 11, a brace 50, a pair of inner members 51, and a pair of side members 7.
Further, in this vehicle structure A, when a rear collision of the vehicle occurs, the battery 2 is replaced with FIG.
Further, a rigid break point RP that can rotate in the direction indicated by the arrow Na and form a rearward rising shape is provided.

In FIGS. 1 and 2, the step portion 10 of the floor portion 1 is provided in a substantially central portion of the floor portion 1 of the vehicle in the front-rear direction of the vehicle, or a portion closer to the rear of the vehicle. In the figure, reference numeral 9 indicates a rear wheel.
In the present embodiment, among the floor portions 1, the front side of the vehicle from the step portion 10 is the front floor panel portion 1a, and the rear side of the floor portion 10 and the step portion 10 is the rear floor panel portion 1b. The step portion 10 is a portion whose front portion is higher than the front floor panel portion 1a by an appropriate height, and is basically inclined so that the height gradually increases toward the rear side of the vehicle. Includes a sloping section. However, this inclined portion is provided with a flattened region (a region recessed in a concave shape as compared with the surroundings), and this region is designated as the mounting region S of the battery 2. The battery 2 is a drive main battery, for example, a large lithium ion secondary battery, a nickel hydrogen secondary battery, or the like.

The turret-shaped structure 3 is configured by joining, for example, a plurality of pipe materials, and is provided so as to cover the upper part of the battery 2. The turret-shaped structure 3 surrounds the battery 2 and is useful for protecting the battery 2, but also serves as a seat cushion frame for the rear seat. A seat cushion 37 constituting a rear seat and a seat back 38 are placed on the upper side of the turret-shaped structure 3. The turret-shaped structure 3 is attached, for example, by fixing the front support leg 3a to the cross member 4 and fixing the rear support 3b to the side member 7.

As is often shown in FIG. 3, a fuel tank 91 is provided below the mounting area S of the battery 2 of the floor portion 1. Further, a recess 18 is formed in the rear floor panel portion 1b of the luggage compartment 98 at the rear of the vehicle, and an auxiliary battery 28 such as a lead storage battery is mounted in the recess 18. A rear opening 96 opened and closed by a back door 97, a lower back 95 located below the rear opening 96, and the like are provided at the rear end of the vehicle, and a load F is input to these portions at the time of a rear collision of the vehicle.

As is well shown in FIG. 5, the pair of side members 7 face each other at intervals in the vehicle width direction, and extend in the vehicle front-rear direction while having a bent form in the bottom view. The floor portion 1 is joined to the upper surface portion of each side member 7. In FIG. 7, each side member 7 has a bent side view, and has an inclined portion 7a rising backward and a substantially horizontal horizontal portion 7b connected to the front side of the vehicle by the inclined portion 7a via a bent portion 7c. have. The inclined portion 7a is arranged so as to overlap the mounting area S of the battery 2 (outward side in the vehicle width direction of the battery 2) in the vehicle front-rear direction.

In FIGS. 7 to 9, a reinforcing member 8 is welded (joined) to each side member 7, whereby a rigid break point RP is provided.
Specifically, as shown in FIG. 8, the side member 7 has a cross-section hat shape, whereas the reinforcing member 8 also has a cross-section hat shape in its basic shape. In the combined structure of the side member 7 and the reinforcing member 8, the front portion 80a of the bottom wall portion 80 of the reinforcing member 8 has a front joint portion 72a welded to the bottom wall portion 70 of the horizontal portion 7b of the side member 7. It is provided. Further, the upper flange portion 81 provided in the region near the rear of the reinforcing member 8 straddles from the horizontal portion 7b to the inclined portion 7a via the bent portion 7c, and the upper flange portion of the side member 7 located in these portions. A rear joint 72b welded to 71 is also provided. FIG. 9 shows an example of arrangement of the welded portion W between the reinforcing member 8 and the side member 7, but the side wall portions where the reinforcing member 8 and the side member 7 are in mutual contact with each other are also appropriately welded.

In the present embodiment, the rigidity breaking point RP is the portion of each side member 7 between the front joint portion 72a and the rear joint portion 72b, or more precisely, the rear end to the rear side of the front joint portion 72a. It is a portion extending to the front end of the joint portion 72b (for easy understanding, the rigidity break point RP is appropriately shown by a virtual line in the drawing). In the present embodiment, the positions of the rear end of the front joint portion 72a and the front end of the rear joint portion 72b in the vehicle front-rear direction are substantially the same, but the positions are not limited to this, and for example, the rear end and the front end thereof are not limited to this. It may be arranged so as to be separated in the front-rear direction of the vehicle.

Based on the provision of the rigidity break point RP, when the side member 7 receives a large load input of a predetermined value or more from the rear side of the vehicle, the rigidity break point RP becomes the starting point and is indicated by an arrow Nb. , Can be bent and deformed in a rising shape. Such bending deformation of the side member 7 is accompanied by bending deformation of the floor portion 1. Therefore, the battery 2 also rotates in an upward-sloping manner as indicated by the arrow Na (see also FIG. 4A).
In the present embodiment, although the bending portion 7c exists on the vehicle rear side of the rigid breaking point RP, it is possible to use the rigid breaking point RP as the starting point of bending deformation of the side member 7 even when a load is input. , The side member 7 is prevented from being bent and deformed starting from the bent portion 7c. Reference numeral 92 in FIG. 7 indicates a reinforcing member different from the reinforcing member 8.

In FIGS. 1 and 2, the cross member 4 is provided in a bridge shape between the pair of side members 7 and extends in the vehicle width direction so as to be along the front end portion of the step portion 10 of the floor portion 1. It is arranged on the floor portion 1. As is well shown in FIG. 4, the cross member 4 has an upright wall portion 40 that stands upright in the vertical height direction, and the lower portion of the upright wall portion 40 abuts on the upper surface of the floor portion 1. Is joined. Preferably, the contact joint portion 41 between the lower portion of the upright wall portion 40 and the floor portion 1 is located on the rear side of the vehicle with respect to the rigidity breaking point RP in the vehicle front-rear direction. Further, as shown in FIGS. 1 and 2, the contact joint portion 41 has no uneven steps in the vertical and front-rear directions of the vehicle and is straight in the vehicle width direction at least in a range La wider than the width Lb of the battery 2. It is said to have a structure that extends upward.
As shown in FIGS. 3 and 4, another cross member 4A is also provided on the vehicle rear side of the battery 2. The cross member 4A is also provided as a bridge between the pair of side members 7. The two cross members 4, 4A located in front of and behind the battery 2 increase the strength of the vehicle body in the vehicle width direction and help protect the battery 2 in the event of a side collision of the vehicle.

The floor tunnel portion 11 is located on the front side of the vehicle with respect to the step portion 10 and the mounting area S of the battery 2, is provided in the central portion of the floor portion 1 in the vehicle width direction, and extends in the vehicle front-rear direction. .. For example, an exhaust pipe 94 is passed through the inside of the floor tunnel portion 11 (see FIG. 5). The rear end portion 11a of the floor tunnel portion 11 does not extend to the position of the cross member 4, and is provided on the front side of the cross member 4 so as to be separated by an appropriate dimension. In the front-rear direction of the vehicle, the rigidity break point RP is located between the rear end portion 11a of the floor tunnel portion 11 and the cross member 4.
In the present embodiment, the rear end portion 11a of the floor tunnel portion 11 is inclined so that the height gradually decreases toward the rear side of the vehicle, but instead, the rear end portion 11a is cut off in a non-inclined manner. It can also be in the form of a tunnel.

In the brace 50, both front and rear ends are joined to the upper portion of the rear end portion 11a of the floor tunnel portion 11 and the upper portion of the cross member 4, and these portions are connected in a bridging shape. This makes it possible to increase the strength of the entire area between the floor tunnel portion 11 and the cross member 4, but due to changes in specifications such as the thickness and width of the brace 50, the battery 2 at the time of a rear collision of the vehicle It is possible to control the smoothness of the rotation operation of the. Preferably, an appropriate gap 52 is formed between the brace 50 and the floor portion 1 immediately below the brace 50. According to such a configuration, when the floor portion 1 bends backward in the rear collision of the vehicle, the gap 52 becomes a movable area of the floor portion 1, and the battery is accompanied by the bending of the floor portion 1. It becomes possible to rotate 2 appropriately.

As is often shown in FIGS. 5 and 6, the pair of inner members 51 are joined to the lower surface side of the pair of left and right base end portions 11b of the floor tunnel portion 11 and extend in the front-rear direction of the vehicle. In FIG. 6, reference numeral 93 is a rocker.
As shown in FIGS. 4 and 5, the rear end portion 51a of each inner member 51 does not extend to the position of the cross member 4 in the vehicle front-rear direction like the rear end portion 11a of the floor tunnel portion 11, and is crossed. The member 4 is provided on the front side of the vehicle so as to be separated by an appropriate dimension.
The rear end portion 51a of the inner member 51 is inclined so that the height gradually decreases toward the rear side of the vehicle, but the rear end portion 51a is not the same as the rear end portion 11a of the floor tunnel portion 11 described above. It can also be cut off in an inclined shape.

Next, the operation of the vehicle structure A described above will be described.

First, when the vehicle causes a rear collision and an input of a load F equal to or greater than a predetermined value is input to the rear portion of the vehicle, a part of the load F is input to a pair of side members 7 to compress each side member 7 to the front of the vehicle. Acts as a force. Then, as described above, each side member 7 rises from the rigidity break point RP on the rear side of the vehicle starting from the rigidity break point RP as shown by the arrow Nb in FIG. 4 (a). It bends and the battery 2 rotates in an upward-sloping manner as shown by the arrow Na in the figure. Such a rotational operation of the battery 2 suppresses a direct load input to the battery 2, and it is possible to effectively prevent damage to the battery 2. Since the side member 7 provided with the rigid break point RP is located on the outer side of the mounting area S of the battery 2 in the vehicle width direction, the rotational operation of the battery 2 is compared with the degree of bending deformation of the side member 7. Can be made gradual. Therefore, it is possible to prevent the mounting area S of the battery 2 from being unnecessarily greatly deformed or displaced.

As a means for preventing damage to the battery 2, each side member 7 is provided with a rigid breaking point RP, and a means for controlling deformation of each part and displacement of the battery 2 when a load F is input is adopted, so that the weight of the vehicle is reduced. It is possible to suppress the increase, improve the productivity, and appropriately reduce the manufacturing cost.

The rigid break point RP is provided by joining the reinforcing member 8 to the side member 7 originally provided in the vehicle. Therefore, the configuration is rational and the manufacturing cost can be further reduced.

The cross members 4 and 4A receive a lateral impact load input from the outside in the vehicle width direction at the time of a lateral collision of the vehicle, and play a role of preventing the lateral impact load from being directly input to the battery 2. In particular, the contact joint portion 41 between the lower portion of the upright wall portion 40 of the cross member 4 and the floor portion 1 has no uneven steps in the vertical and front-rear directions over a range La wider than the width Lb of the battery 2, and is in the vehicle width direction. Since the range La has an extended linear shape, it is possible that the range La is less likely to be bent and deformed by a load input from the outside in the vehicle width direction. As a result, it is possible to more effectively prevent the lateral impact load from being input to the battery 2. Further, it is possible to effectively set the rigidity break point RP at the position of the cross member 4 on the front side of the vehicle.

As described above, the rear end portion 11a of the floor tunnel portion 11 is separated from the cross member 4 toward the front side of the vehicle. Therefore, when each side member 7 bends with the rigidity breaking point RP as the starting point at the time of the rear collision of the vehicle, the rear end portion 11a and the cross member 4 of the floor portion 1 intersect with each other. It is possible to properly bend the position between them. In the present invention, unlike the present embodiment, the rear end portion 11a of the floor tunnel portion 11 may be connected to the cross member 4, but in this case, the rigidity of the floor tunnel portion 11 is increased. Due to its large size, it may be difficult to properly bend and deform the floor portion 1 at a portion corresponding to the rigid breaking point RP at the time of a rear collision of the vehicle. On the other hand, according to the configuration of the present embodiment, it is possible to appropriately eliminate such a risk, which is preferable.

The brace 50 connects the rear end portion 11a of the floor tunnel portion 11 and the cross member 4, and according to such a configuration, the strength of the mutual region between the rear end portion 11a and the cross member 4 is increased. be able to. Therefore, it is possible to prevent a problem such as insufficient strength of the vehicle due to the fact that the floor tunnel portion 11 is not connected to the cross member 4. By changing the specifications of the brace 50, it is possible to control the rotational operation of the battery 2 at the time of a rear collision of the vehicle. Preferably, a gap 52 is provided between the brace 50 and the floor portion 1 so that the bending of the floor portion 1 (rotation of the battery 2) is not hindered by the brace 50 at the time of the rear collision of the vehicle. It is also possible.

The pair of inner members 51 increase the rigidity of the floor tunnel portion 11. At the time of a front collision of the vehicle, these inner members 51 together with the floor tunnel portion 11 also receive the front collision load and can absorb the energy. Therefore, it is possible to have an excellent effect of suppressing the front collision load of the vehicle from being directly input to the battery 2. On the other hand, the rear end portion 51a of the inner member 51 is arranged so as to be separated from the vehicle front side of the cross member 4 in the vehicle front-rear direction, similarly to the rear end portion 11a of the floor tunnel portion 11. Therefore, at the time of the rear collision of the vehicle, the operation of the floor portion 1 bending at the portion corresponding to the rigidity breaking point RP is not hindered by the rear end portion 51a of the inner member 51.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the vehicle structure according to the present invention can be variously redesigned within the scope of the present invention.

In the above-described embodiment, the reinforcing member 8 is joined to each of the pair of side members 7, and the rigidity breaking point RP is provided while reinforcing the side member 7 without reducing the rigidity of the side member 7 itself. This is a preferable configuration in order not to cause insufficient strength of the vehicle. However, the present invention is not limited to this. The rigidity break point in the present invention may be configured by, for example, providing a fragile portion such as a notch portion or a thin-walled portion on each side member 7.

The power storage device does not necessarily have to be arranged in the space below the vehicle seat such as the rear seat (that is, the vehicle seat does not have to be installed above the power storage device). The power storage device may be mounted on a stepped portion of the floor portion. The stepped portion does not necessarily have to be an inclined shape that rises backward, and may be a region where a stepped portion is generated as compared with other regions of the floor portion.
The specific type and number of power storage devices are not limited. The power storage device according to the present invention includes not only various batteries but also capacitors.

A Vehicle structure RP Rigidity break point S Battery mounting area (power storage device mounting area)
1 Floor part 10 Step part 11 Floor tunnel part 11a Rear end part (of floor tunnel part)
2 Battery (power storage device)
4 Cross member 40 Standing wall 41 Abutment joint 50 Brace 51 Inner member 51a Rear end (of inner member)
7 Side member 7a Inclined part (of side member)
7b Horizontal part (of side members)
7c Bending part 72a Front side joint part 72b Rear side joint part 8 Reinforcing member

Claims (5)

Of the floor of the vehicle, a step portion provided in the substantially central portion in the front-rear direction of the vehicle or a portion closer to the rear of the vehicle than that, and a step portion.
Of the floor portion, the power storage device mounted on the step portion and
After being joined to a portion of the floor portion on the outer side in the vehicle width direction from the mounting area of the power storage device, extending in the front-rear direction of the vehicle, and being connected to the rear portion of a substantially horizontal horizontal portion via a bending portion. A pair of left and right side members with a rising slope,
The vehicle structure is equipped with
When the vehicle causes a rear collision and a load input of a predetermined value or more is applied to the rear portion of the vehicle, the floor portion starts from a portion of the floor portion on the front side of the vehicle with respect to the mounting area of the power storage device. Further, it is provided with a rigid breaking point that allows the power storage device to rotate in a rearwardly rising manner.
The rigidity break point is set at a position on the front side of the vehicle with respect to the rear-raising inclined portion among the side members, and when the load input is received at the rear portion of the rear-raising inclined portion, the rear The rising inclined portion is configured to be rotatable backward with the rigidity breaking point as a starting point so as to accompany the mounting area of the power storage device on the floor portion.
The rear rising inclined portion of each side member is provided in an arrangement that overlaps with the front portion of the power storage device in the vehicle front-rear direction, and the rear portion of the rear rising inclined portion is from the power storage device. The vehicle structure is characterized by being located above and behind the vehicle. The vehicle structure according to claim 1.
On the floor portion, a cross member located on the front side of the vehicle in the mounting area of the power storage device and extending in the vehicle width direction is further provided.
This cross member has an upright wall portion that stands upright in the vertical height direction and whose lower portion abuts on the floor portion and is joined.
The contact joint between the lower part of the upright wall portion and the floor portion has no uneven steps in the vertical and front-rear directions of the vehicle, and is straight in the vehicle width direction, at least in a range wider than the width of the power storage device in the vehicle width direction. A vehicle structure that is said to extend in a shape. The vehicle structure according to claim 1 or 2.
A floor tunnel portion provided on the floor portion and extending in the front-rear direction of the vehicle is further provided.
The rear end portion of the floor tunnel portion is arranged so as to be separated from the mounting area of the power storage device and the step portion on the front side of the vehicle in the front-rear direction of the vehicle. The vehicle structure according to claim 3.
A vehicle structure further provided with a brace for connecting the rear end portion of the floor tunnel portion to a fixed vehicle member of any of the mounting area of the power storage device and the step portion in a bridging manner. The vehicle structure according to any one of claims 1 to 4.
A pair of left and right inner members that are joined to the lower surface side of a pair of left and right base ends of a floor tunnel portion that is provided on the floor portion and extends in the front-rear direction of the vehicle and that extends in the front-rear direction of the vehicle are further provided.
The rear end portion of the pair of inner members is arranged so as to be separated from the mounting area of the power storage device and the step portion on the front side of the vehicle in the front-rear direction of the vehicle.

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