JP6849293B2 - Vehicle structure - Google Patents

Description

The present invention relates to a vehicle structure in which a power storage device such as a battery mounted on a vehicle can be suitably protected 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 portion where a step portion is formed on the floor portion of the passenger compartment, 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 at 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, means for increasing the rigidity of each peripheral part of the battery by using a turret-like structure is adopted, but the battery is provided only by the means for increasing the rigidity of each part in this way. Sufficient protection can lead to 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 vehicle rear collision 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 measures 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 vehicle front-rear direction or a portion closer to the rear of the vehicle in the vehicle floor portion, and the step portion in the floor portion. In a vehicle structure including a power storage device mounted on the vehicle, 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 of the floor portion. A rigid breaking point that bends the floor portion from a portion on the front side of the vehicle with respect to the mounting area of the power storage device and enables the power storage device to rotate in a rearward direction, and mounting of the power storage device on the floor portion. A pair of left and right side members that are joined to a portion on the outer side in the vehicle width direction with respect to the region and extend in the front-rear direction of the vehicle, and a pair of left and right reinforcing members corresponding to these pair of side members are further provided. The pair of side members are arranged in a substantially horizontal shape in the front-rear direction of the vehicle, in which the inclined portion is arranged so as to overlap the mounting area of the power storage device and is connected to the front side of the inclined portion via a bending portion. Each side member and each reinforcing member has a front joint portion in which the front portion of each reinforcing member is joined to the lower portion of the horizontal portion of each side member, and the said The rear portion of each reinforcing member has a rear side joint portion that straddles the inclined portion from the horizontal portion via the bent portion and is joined to the upper portion of these portions, and each of the side members. Of these, the portion between the front joint portion and the rear joint portion is characterized in that it is the rigidity breaking point.

According to such a configuration, the following effects can be obtained.
That is, when the vehicle causes a rear collision and a load input exceeding a predetermined value is applied to the rear portion of the vehicle, the floor portion is bent starting 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 a rearwardly rising 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 rigidity break points (fragile parts, 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.

Further , according to such a configuration, the following effects can be obtained.
First, when a rear collision of the vehicle occurs and a large load is input to each side member from the rear side of the vehicle, the predetermined front joint portion and the rear side joint portion of each side member and the reinforcing member described above Each side member can be bent and deformed in a rearwardly rising shape starting from a rigid break point that is a portion between the two, and the power storage device can be rotated in a rearwardly rising shape accordingly. Since the side member has a bent portion at the boundary portion between the horizontal portion and the inclined portion, there is a possibility that the side member is bent and deformed from this bent portion as a starting point. However, according to the above configuration, the reinforcing member Based on the combined action with, it is possible to prevent the side member from bending and deforming from the bent portion as a starting point. Therefore, according to the above configuration, even if the bent portion of the side member exists at a position overlapping the side (outer side in the vehicle width direction) of the mounting area of the power storage device, it is on the front side of the vehicle. It is possible to set a rigid break point at the position of, and to appropriately perform the rearward rotation of the power storage device at the time of a rear collision of the vehicle.
Secondly, since the deformation of each side member is performed outside the vehicle width direction of the power storage device mounting area, it is possible to prevent the floor portion of the power storage device mounting area from being unnecessarily greatly deformed. it can.
Thirdly, the pair of side members are members originally provided in the vehicle, and by joining the reinforcing members to the members in a predetermined state, the rigidity breaking point intended by the present invention is constructed. Therefore, the configuration is rational, and is more preferable in terms of reducing the manufacturing cost and the like.
Fourth, the reinforcing member also helps to secure the rigidity of the vehicle during normal running.

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 up in the direction and has a lower portion that 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.

According to 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 extends 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 impact load (when the member receives a load in the longitudinal direction, 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 impact load from being input to the power storage device at the time of the lateral collision of the vehicle.
Further, it is also 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 stepped portion on the front side of the vehicle.

According to such a configuration, a rigidity break point can be appropriately set at a 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 when the vehicle collides with the rear. In the above, it becomes more preferable in ensuring the operation of the power storage device rotating in a rearwardly 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 that connects the rear end portion of the floor tunnel portion to the mounting region of the power storage device and the fixed vehicle member of the step portion in a bridging manner.

According to such a configuration, the following effects can be obtained.
That is, if the size of the floor tunnel portion in the vehicle front-rear direction 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 rigidity of the peripheral portion thereof is increased accordingly. descend. 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 a 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 (rotation of the power storage device in a rearward manner) 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 vehicle front-rear direction and extend in the vehicle front-rear direction 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 ensures the rigidity of the vehicle during normal driving, 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, at the time 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 the rear collision of the vehicle.

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

It is a schematic perspective view of a partially broken part which shows an example of the vehicle structure which concerns on this invention. It is a schematic perspective view of a partially broken part which shows the state which the battery 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 line IVa-IVa of FIG. 1, and FIG. 1B is a sectional view taken along 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 perspective view of the main part of (a). It is a schematic plan view of the main part of the part shown in FIG.

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 the vehicle structure A, there is a rigid break point RP that enables the battery 2 to rotate in the direction indicated by the arrow Na in FIG. 4 to form a rearward rising shape when a rear collision of the vehicle occurs. , Further equipped.

In FIGS. 1 and 2, the stepped 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, a flattened region (a region recessed in a concave shape as compared with the surroundings) is provided in this inclined portion, and this region is designated as a 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 a plurality of pipe materials, for example, 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 often 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 a rearwardly rising inclined portion 7a and a substantially horizontal horizontal portion 7b connected to the vehicle front side of 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, each side member 7 is welded (joined) with a reinforcing member 8 to provide a rigid break point RP.
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 is welded to the bottom wall portion 70 of the horizontal portion 7b of the side member 7, and the front joint portion 72a is welded. It is provided. Further, the upper flange portion 81 provided in the region near the rear portion of the reinforcing member 8 straddles from the horizontal portion 7b to the inclined portion 7a via the bending portion 7c, and the upper flange portion of the side member 7 located at these portions. A rear joint 72b welded to 71 is also provided. FIG. 9 shows an example of arranging 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 strictly, 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 ease of 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 present invention is not limited to this, and for example, the rear end and the front end thereof are not limited to this. The arrangement may 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 at the time of load 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 as a bridge 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 up 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. Are joined together. Preferably, the lower part of the upright wall portion 40 and the floor portion 1
The contact joint 41 with the vehicle is located on the rear side of the vehicle in the front-rear direction of the vehicle with respect to the rigidity breaking point RP. 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 at the center 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 by an appropriate dimension. In the front-rear direction of the vehicle, the rigidity breaking 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 bent along with 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 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 in an arrangement 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. Due to such a rotational operation of the battery 2, a direct load input to the battery 2 is suppressed, and damage to the battery 2 can be effectively prevented. Since the side member 7 provided with the rigid breaking 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 loose. 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. The increase can be suppressed, the productivity can be improved, and the manufacturing cost can be appropriately reduced.

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 play a role of receiving the lateral impact load input from the outside in the vehicle width direction at the time of the lateral collision of the vehicle and preventing the lateral impact load from being directly input to the battery 2. In particular, the abutting joint 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 is a straight line extending, the range La can be made 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 breaking 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 are mutually connected with this. It is possible to bend the position between them appropriately. 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, such a possibility can be appropriately eliminated, 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 brace 50 does not hinder the bending of the floor portion 1 (rotation of the battery 2) 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 impact 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 intended by 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 lowering the rigidity of the side member 7 itself. This is a preferable configuration so as not to cause insufficient strength of the vehicle .

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 have 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 member)
7c Bent 72a Front joint 72b Rear joint 8 Reinforcing member

Claims (5)

Of the floor of the vehicle, a step portion provided at a 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
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. A rigid break point that bends the power storage device and allows the power storage device to rotate in a rearwardly rising manner .
A pair of left and right side members joined to a portion of the floor portion on the outer side in the vehicle width direction with respect to the mounting area of the power storage device and extending in the front-rear direction of the vehicle.
A pair of left and right reinforcing members corresponding to these pair of side members,
Is further equipped with
The pair of side members are substantially horizontal in the vehicle front-rear direction, connected to an inclined portion that rises rearward so as to overlap the mounting area of the power storage device and to the front side of the inclined portion via a bending portion. It has a horizontal part and has a shape.
In each of the side members and the reinforcing members, the front portion of the reinforcing member is joined to the lower portion of the horizontal portion of the side member, and the rear portion of the reinforcing member is the horizontal portion. It has a rear joint portion that straddles the inclined portion via the bent portion and is joined to the upper portion of these portions.
A vehicle structure characterized in that, among the side members, a portion between the front joint portion and the rear joint portion is the rigidity breaking point. The vehicle structure according to claim 1.
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 on the floor portion is further provided.
This cross member has an upright wall portion that is upright in the vertical height direction and whose lower portion is abutted against and joined to the floor portion.
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. 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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