JP2020023277A - Vehicle structure - Google Patents

Abstract

To provide a vehicle structure that can enhance protection performance of a power storage device such as a battery at the time of a rear collision of a vehicle while preventing or suppressing problems such as an increase in weight and an increase in manufacturing cost.SOLUTION: A vehicle structure A is provided with a step part 10 provided at an approximately center part in a longitudinal direction of a vehicle or at a site closer to a rear side of the vehicle than the center part in a floor part 1 of the vehicle, and a power storage device 2 mounted on the step part 10 in the floor part 1, which is further provided with a rigidity break point RP that when a rear collision of the vehicle occurs so that a prescribed load or more is inputted to a rear side of the vehicle, can bend the floor part 1 with a part closer to a front side of the vehicle than an area S in which the power storage device 2 is mounted in the floor part 1 and can rotate the power storage device 2 so that a rear side of the device is raised.SELECTED DRAWING: Figure 1

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 at the time 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 document, a rear seat is provided at a place where a step portion of a floor portion of a passenger compartment is formed, and a large area such as a lithium ion secondary battery is provided below the rear seat. Battery (power storage device). The battery is covered by a tower-like structure serving as a battery protection member also serving as a seat cushion frame of a rear seat.
According to such a configuration, the battery can be mounted in the vehicle compartment with good space efficiency, and can be protected by the tower-shaped structure.

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

  That is, when the battery is provided at a substantially central portion of the floor portion 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 related art, a means for increasing the rigidity of each part around the battery by using a tower-like structure is employed, but the battery is increased only by means for increasing the rigidity of each part. Attempting to provide sufficient protection results in increased weight and increased manufacturing costs. Therefore, there is room for improvement in such a point.

JP 2011-126439 A

  The present invention has been conceived under the circumstances as described above, and prevents or suppresses problems such as an increase in weight and an increase in manufacturing cost while storing power such as a battery during a rear collision of a vehicle. It is an object of the present invention to provide a vehicle structure capable of improving the protection performance of the device.

  In order to solve the above problems, the present invention takes the following technical measures.

  The vehicle structure provided by the present invention includes a step portion provided at a substantially central portion in a vehicle front-rear direction or a portion closer to the vehicle rear than the vehicle floor portion, and the step portion among the floor portions. And a power storage device mounted on the vehicle structure, wherein the vehicle has a rear collision, and when a load input to a rear portion of the vehicle is greater than or equal to a predetermined value, of the floor portion, A rigid break point that bends the floor portion starting from a portion on the vehicle front side with respect to the mounting area of the power storage device and that allows the power storage device to rotate in a rearward upward shape is further provided. .

According to such a configuration, the following effects can be obtained.
That is, when a rearward collision occurs and a load is applied to the rear of the vehicle beyond a predetermined value, the rigidity break point causes the floor portion to bend from a portion on the front side of the vehicle with respect to the mounting area of the power storage device. Thus, the power storage device can be rotated backward. By rotating the power storage device in this manner, input of a direct load to the power storage device is reduced, and damage to the power storage device can be effectively prevented or suppressed.
The present invention does not increase the rigidity so that each part around the power storage device does not deform, but provides a rigid break point (such as a fragile portion) to control the deformation at the time of load input and the displacement of the power storage device. For this reason, it is possible to suppress an increase in weight, to appropriately improve productivity and reduce manufacturing costs.

  In the present invention, preferably, 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 vehicle front-rear direction, A pair of corresponding left and right reinforcing members, wherein the pair of side members are disposed in a vehicle front-rear direction and overlapped with a mounting area of the power storage device, and a rear rising slope portion; And a substantially horizontal horizontal portion connected to the vehicle front side of the portion via a bent portion, wherein each of the side members and each of the reinforcing members are arranged such that a front portion of each of the reinforcing members is a corresponding one of the side members. The front joining portion joined to the lower portion of the horizontal portion, and the rear portion of each reinforcing member straddles the inclined portion from the horizontal portion via the bending portion, and is joined to the upper portions of these portions. rear Has a joint portion, of each of the side members, the portion between each other and the rear side joining portion and the front mating portion, a said rigid cross point.

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, a predetermined front joint and a rear joint of each of the side members and the reinforcing member are connected. Each side member can be bent upward and bent starting from the rigid break point, which is a portion between them, and the power storage device can be rotated upward and backward accordingly. Since the side member has a bent portion at the boundary between the horizontal portion and the inclined portion, there is a possibility that the side member may be bent and deformed with the bent portion as a starting point. It is possible to prevent the side member from being bent and deformed from the bent portion as a starting point. Therefore, according to the above configuration, even when the bent portion of the side member is present at a position overlapping (behind the vehicle width direction) the mounting area of the power storage device, the vehicle is located further forward than the overlapping portion. , A rigid break point can be set at the position, and the rearward rotation of the power storage device can be appropriately performed at the time of a rear collision of the vehicle.
Second, since the deformation of each side member is performed outside the mounting area of the power storage device in the vehicle width direction, it is possible to prevent the floor portion of the mounting area of the power storage device from being unnecessarily greatly deformed. it can.
Third, the pair of side members are members originally provided in the vehicle, and the reinforcing member is joined to the member in a predetermined state, thereby forming a rigid breaking point intended by the present invention. Therefore, the configuration is rational, which is more preferable in reducing manufacturing costs and the like.
Fourth, the reinforcing member also helps ensure the rigidity of the vehicle during normal traveling.

  In the present invention, preferably, on the floor portion, a cross member extending in the vehicle width direction is provided on the vehicle front side of the mounting area of the power storage device, and the cross member has a vertical height. And has an upright wall portion whose lower portion is in contact with and joined to the floor portion, and a contact junction between the lower portion of the upright wall portion and the floor portion is at least the power storage device. In a range wider than the width in the vehicle width direction, there is no unevenness in the up-down direction and the vehicle front-rear direction, and the structure extends linearly in the vehicle width direction.

According to such a configuration, the following effects can be obtained.
That is, when the vehicle has a side collision, the cross member receives a side collision load from the outside in the vehicle width direction. Here, this is not the case if the abutting joint between the upstanding wall portion and the floor portion of the cross member has a configuration in which there is no uneven step in the vertical and vehicle longitudinal directions and extends linearly in the vehicle width direction. As compared with the configuration, it is possible to make it difficult for deformation to occur in response to the input of the side impact load (when the member receives a load in the longitudinal direction, the more unevenness or bent portion is present in this member, The member tends to bend and deform). Thus, it is possible to effectively prevent a side collision load from being input to the power storage device during a side collision of the vehicle.
Further, it is possible to effectively set the rigidity break point on the vehicle front side of the cross member.

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

According to such a configuration, the rigid 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. In this case, it is more preferable to ensure the operation of rotating the power storage device backward.
The floor tunnel portion also helps secure rigidity during normal running.

  In the present invention, preferably, there is further provided a brace for connecting a rear end of the floor tunnel portion to a mounting area of the power storage device and any 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 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 is reduced by that much. descend. On the other hand, the brace compensates for such a decrease in rigidity and helps ensure sufficient rigidity.
Further, the rotation operation of the power storage device at the time of a rear collision of the vehicle can be controlled by the specifications of the brace.
It is more preferable that a gap is provided between the brace and the floor located below the brace. According to such a configuration, at the time of a rear collision of the vehicle, the floor portion can rise relative to the brace, so that the bending of the floor portion (rotation of the power storage device ascending backward) is not largely 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 provided on the floor portion and are joined to lower surfaces of a pair of left and right base ends of a floor tunnel portion extending in the vehicle longitudinal direction and extend in the vehicle longitudinal direction are further provided. The rear ends of the pair of inner members are arranged to be separated from the mounting area of the power storage device and the stepped portion toward the front side of the vehicle in the vehicle front-rear direction.

According to such a configuration, the presence of the pair of inner members not only ensures the rigidity of the vehicle during normal traveling, but also when the vehicle is hit 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 the pair of inner members, and the impact energy can be absorbed. Therefore, the power storage device protection performance during a frontal collision of the vehicle can also 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 mounting area of the power storage device and at the position between the step portion and each inner member. That is, it is possible to prevent the inner members 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 present invention will become more apparent from the following description of embodiments of the invention with reference to the accompanying drawings.

1 is a schematic perspective view of a partly broken main part showing an example of a vehicle structure according to the present invention. FIG. 2 is a schematic perspective view of a partially broken main part showing a state where a battery or the like of the vehicle structure shown in FIG. 1 is not attached. FIG. 2 is a side sectional view of a main part at a position of a side member of the vehicle structure shown in FIG. 1. (A) is a sectional view taken along the line IVa-IVa in FIG. 1, and (b) is a sectional view taken along the line IVb-IVb in FIG. 1. It is a principal part schematic bottom view of FIG. It is VI-VI sectional drawing of FIG. FIG. 4 is an enlarged side sectional view of a main part of FIG. 3. (A) is a perspective view of a principal part of a portion shown in FIG. 7, and (b) is an exploded perspective view of a principal part of (a). FIG. 8 is a schematic plan view of a main part of a portion 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, for example, and includes a step portion 10 provided on a floor portion 1 of the vehicle, a battery 2 as a power storage device mounted on the step portion 10, It includes a tower-like structure 3, a cross member 4, a floor tunnel 11, a brace 50, a pair of inner members 51, and a pair of side members 7.
Further, in the vehicle structure A, when a rear collision of the vehicle occurs, the rigid break point RP that enables the battery 2 to rotate in the direction indicated by the arrow Na in FIG. Are further provided.

In FIGS. 1 and 2, the step portion 10 of the floor portion 1 is provided at a substantially central portion in the vehicle front-rear direction or a portion closer to the vehicle rear than the vehicle floor portion 1. In the figure, reference numeral 9 indicates a rear wheel.
In the present embodiment, in the floor portion 1, the front floor panel portion 1a is on the vehicle front side with respect to the step portion 10, and the rear floor panel portion 1b is on the vehicle rear side with respect to the step portion 10 and the step portion 10. 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 such that the height gradually increases toward the rear side of the vehicle. Includes an inclined portion. However, the inclined portion is provided with a flattened region (a region depressed in a concave shape as compared with the surroundings), and this region is a mounting region S for the battery 2. The battery 2 is a driving main battery, and is, for example, a large-sized lithium ion secondary battery or a nickel hydride secondary battery.

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

  As well shown in FIG. 3, a fuel tank 91 is provided below the mounting area S of the battery 2 on the floor unit 1. A recess 18 is formed in the rear floor panel 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. The rear end of the vehicle is provided with a rear opening 96 opened and closed by a back door 97, a lower bag 95 located below the rear opening 96, and the like.

  5, the pair of side members 7 face each other at an interval in the vehicle width direction, and extend in the vehicle front-rear direction while having a bent shape in a bottom view. The floor 1 is joined to the upper surface of each side member 7. In FIG. 7, each side member 7 is bent in a side view, and includes a rearwardly 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 with the mounting area S of the battery 2 in the vehicle front-rear direction (outside of the battery 2 in the vehicle width direction).

7 to 9, a reinforcing member 8 is welded (joined) to each side member 7, so that a rigid break point RP is provided.
Specifically, as shown in FIG. 8, the side member 7 has a hat-shaped cross section, while the reinforcing member 8 also has a hat-shaped cross section. In the combination structure of the side member 7 and the reinforcing member 8, the front portion 80 a of the bottom wall portion 80 of the reinforcing member 8 has a front joint portion 72 a welded to the bottom wall portion 70 of the horizontal portion 7 b of the side member 7. Is provided. Further, an upper flange portion 81 provided in a region near the rear portion of the reinforcing member 8 extends 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 the arrangement of the welded portion W between the reinforcing member 8 and the side member 7. Side wall portions of the reinforcing member 8 and the side member 7 that are in opposing contact with each other are appropriately welded.

  In the present embodiment, the rigid break point RP is a portion of each side member 7 between the front joint portion 72a and the rear joint portion 72b, more specifically, from the rear end of the front joint portion 72a to the rear side. This is a portion reaching the front end of the joint portion 72b (for easy understanding, the rigid break point RP is appropriately indicated by a virtual line in the drawings). 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. However, the present invention is not limited to this. The arrangement may be spaced apart in the vehicle longitudinal direction.

Based on the provision of the rigid break point RP, the side member 7 starts from the rigid break point RP and receives the rigid break point RP as indicated by an arrow Nb when a large load input exceeding a predetermined value is received from the vehicle rear side. , And 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 upward as shown by the arrow Na (see also FIG. 4A).
In the present embodiment, although the bent portion 7c exists on the vehicle rear side of the rigid break point RP, the rigid break point RP can be used as the starting point of the bending deformation of the side member 7 at the time of load input. The bending of the side member 7 starting from the bent portion 7c is suppressed. Reference numeral 92 in FIG. 7 indicates a reinforcing member different from the reinforcing member 8.

1 and 2, the cross member 4 is provided in a bridging manner between the pair of side members 7 and extends in the vehicle width direction, and extends along the front end of the step portion 10 of the floor portion 1. It is arranged on the floor unit 1. As shown in FIG. 4, the cross member 4 has an upright wall portion 40 that stands upright in the vertical direction, and the lower portion of the upright wall portion 40 contacts the upper surface of the floor portion 1. Are joined. Preferably, the lower portion of the upright wall portion 40 and the floor portion 1
The abutting joint portion 41 is located on the vehicle rear side of the rigid breaking point RP in the vehicle front-rear direction. As shown in FIGS. 1 and 2, the abutting joint 41 has no unevenness in the vertical and vehicle longitudinal directions at least in a range La wider than the width Lb of the battery 2 and has a straight line in the vehicle width direction. It is configured to extend upward.
As shown in FIGS. 3 and 4, another cross member 4 </ b> A is provided on the vehicle rear side of the battery 2. The cross member 4A is also provided in a bridging manner between the pair of side members 7. The two cross members 4 and 4A located before and after 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 at a position on the vehicle front side with respect to the mounting region S of the step portion 10 and 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. . 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 at an appropriate distance from the cross member 4 on the vehicle front side. A rigid break point RP is located between the rear end portion 11a of the floor tunnel portion 11 and the cross member 4 in the vehicle longitudinal direction.
In the present embodiment, the rear end 11a of the floor tunnel portion 11 is inclined such that the height gradually decreases toward the rear of the vehicle, but instead, the rear end 11a is cut off in a non-inclined shape. It is also possible to take the form.

  The brace 50 has front and rear ends joined to an upper portion of the rear end portion 11a of the floor tunnel portion 11 and an upper portion of the cross member 4, and connects these portions in a bridging manner. As a result, the strength of the entire area between the floor tunnel portion 11 and the cross member 4 can be increased. It is possible to control the smoothness of the rotation operation of the camera. Preferably, an appropriate gap 52 is formed between the brace 50 and the floor 1 immediately below the brace 50. According to such a configuration, at the time of a rear collision of the vehicle, when the floor portion 1 is bent rearward, the gap 52 becomes a movable area of the floor portion 1, and the battery is 2 can be appropriately rotated.

5 and FIG. 6, the pair of inner members 51 are joined to the lower surfaces of the pair of left and right base ends 11b of the floor tunnel portion 11, and extend in the vehicle front-rear direction. In FIG. 6, reference numeral 93 denotes a rocker.
As shown in FIGS. 4 and 5, the rear end 51 a of each inner member 51 does not extend to the position of the cross member 4 in the vehicle front-rear direction similarly to the rear end 11 a of the floor tunnel portion 11, and The member 4 is provided on the front side of the vehicle at an appropriate distance from the vehicle.
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. However, like the rear end portion 11a of the floor tunnel portion 11 described above, the rear end portion 51a is It is also possible to adopt a form cut off in an inclined manner.

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

First, when a rear collision occurs in the vehicle and a load F greater than a predetermined value is input to the rear portion of the vehicle, a part of the load F is input to the pair of side members 7 and each side member 7 is compressed toward the front of the vehicle. Acts as a force. Then, as described above, in each of the side members 7, the portion on the vehicle rear side relative to the rigid break point RP rises with the rigid break point RP as a starting point as indicated by an arrow Nb in FIG. The battery 2 bends, and rotates backward as shown by the arrow Na in FIG. Due to such a rotating operation of the battery 2, 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 break point RP is located outside the mounting area S of the battery 2 in the vehicle width direction, the rotation operation of the battery 2 is compared with the degree of bending deformation of the side member 7. Can be moderated. 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, a rigid break point RP is provided in each side member 7, and means for controlling the deformation of each part when the load F is input and the displacement of the battery 2 are employed. Increase can be suppressed, and productivity can be improved and manufacturing cost can be appropriately reduced.

  The rigid break point RP is provided by joining a reinforcing member 8 to a 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 side collision load input from the outside in the vehicle width direction at the time of a side collision of the vehicle, and play a role of preventing the side collision load from being directly input to the battery 2. In particular, the abutting 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 unevenness in the vertical and vehicle longitudinal directions over a range La wider than the width Lb of the battery 2, Is extended, the range La can be such that bending deformation is not easily caused by a load input from outside in the vehicle width direction. As a result, it is possible to more effectively prevent the side impact load from being input to the battery 2. Further, the rigid break point RP can be effectively set at a position on the vehicle front side of the cross member 4.

  The rear end portion 11a of the floor tunnel portion 11 is separated from the cross member 4 on the vehicle front side as described above. For this reason, when each side member 7 bends from the rigid break point RP at the time of a rear collision of the vehicle, the rear member 11 a of the floor portion 1 and the cross member 4 It is possible to appropriately 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 reduced. Due to the large size, it may be difficult to appropriately bend and deform the floor portion 1 at a location corresponding to the rigid break point RP during a rear collision of the vehicle. On the other hand, according to the configuration of the present embodiment, such a fear can be appropriately eliminated, which is preferable.

  The brace 50 connects the rear end 11a of the floor tunnel portion 11 and the cross member 4, but according to such a configuration, the strength of the region between the rear end 11a and the cross member 4 is increased. be able to. Therefore, it is possible to prevent a problem that the strength of the vehicle is insufficient due to the fact that the floor tunnel portion 11 is not connected to the cross member 4. By changing the specification of the brace 50, the rotation operation of the battery 2 at the time of a rear collision of the vehicle can be controlled. Preferably, a gap 52 is provided between the brace 50 and the floor portion 1 so that the bending of the floor portion 1 (the rotation of the battery 2) is not hindered by the brace 50 at the time of a 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 frontal collision of the vehicle, these inner members 51 together with the floor tunnel portion 11 also receive a frontal collision load and can absorb the energy. For this reason, it is possible to make the function of suppressing the frontal collision load of the vehicle directly input to the battery 2 excellent. On the other hand, the rear end portion 51a of the inner member 51 is spaced apart from the cross member 4 in the vehicle front-rear direction in the vehicle front-rear direction, similarly to the rear end portion 11a of the floor tunnel portion 11. Therefore, at the time of a rear collision of the vehicle, the operation of bending the floor portion 1 at the position corresponding to the rigid break 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 embodiment. The specific configuration of each part of the vehicle structure according to the present invention can be freely changed in various ways within the range 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 rigid break points RP are provided while reinforcing the side members 7 without reducing the rigidity of the side members 7 themselves. This is a preferable configuration in order to prevent the strength of the vehicle from being insufficient. However, the present invention is not limited to this. The rigid break point in the present invention can be configured, for example, by providing a fragile portion such as a cutout portion or a thin portion in each side member 7.

The power storage device does not necessarily have to be arranged in a space below a vehicle seat such as a rear seat (that is, it is not necessary to install the vehicle seat above the power storage device). The power storage device may be mounted on a step portion of the floor portion. The step portion does not necessarily have to be inclined upward and rearward, and may be a region where a step is generated as compared with other regions of the floor portion.
The specific type and number of the power storage device are not limited. The power storage device according to the present invention includes a capacitor in addition to various batteries.

A Vehicle structure RP Rigid break point S Battery mounting area (Power storage device mounting area)
1 floor section 10 step section 11 floor tunnel section 11a rear end (of floor tunnel section)
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 Bending part 72a Front joint part 72b Rear joint part 8 Reinforcement member

Claims (6)

A step portion provided at a substantially central portion in the vehicle front-rear direction or a portion closer to the vehicle rear than the vehicle front portion,
A power storage device mounted on the step portion of the floor portion;
A vehicle structure comprising:
When the vehicle generates a rear collision and receives a load input to a rear portion of the vehicle that is equal to or more than a predetermined value, the floor portion starts from a portion of the floor portion that is closer to a vehicle front side than a mounting area of the power storage device. The vehicle structure further comprises a rigid break point for bending the power storage device and allowing the power storage device to rotate upward. The vehicle structure according to claim 1, wherein
A pair of left and right side members joined to a portion of the floor portion on a vehicle width direction outer side of a mounting area of the power storage device, and extending in a vehicle front-rear direction;
A pair of left and right reinforcing members corresponding to the pair of side members,
Is further provided,
The pair of side members are, in the vehicle longitudinal direction, a rearwardly inclined portion that is arranged to overlap the mounting area of the power storage device, and a substantially horizontal portion that is connected to the vehicle front side of the inclined portion via a bent portion. And has a horizontal part,
In each of the side members and each of the reinforcing members, a front joint of a front portion of each of the reinforcing members is joined to a lower portion of the horizontal portion of each of the side members, and a rear portion of each of the reinforcing members is a horizontal portion. And a rear joining portion that straddles the inclined portion through the bending portion, and is joined to upper portions of these portions,
A vehicle structure in which a portion between the front joint and the rear joint of the side members is the rigid breaking point. The vehicle structure according to claim 1 or 2,
A cross member that extends in the vehicle width direction at a position on the vehicle front side of a mounting area of the power storage device on the floor portion,
The cross member has an upright wall portion that stands upright in the vertical direction, and has a lower portion abutting and joined to the floor portion.
The contact joint between the lower portion of the upright wall portion and the floor portion has at least a range wider than the width of the power storage device in the vehicle width direction without any unevenness in the vertical and vehicle front-rear directions, and is straight in the vehicle width direction. A vehicle structure having a configuration extending in a shape. The vehicle structure according to any one of claims 1 to 3,
A floor tunnel portion provided on the floor portion and extending in a vehicle front-rear direction,
The vehicle structure, wherein a rear end of the floor tunnel portion is arranged to be separated from a mounting area of the power storage device and the step portion toward a vehicle front side in a vehicle front-rear direction. The vehicle structure according to claim 4, wherein
A vehicle structure further comprising a brace for connecting a rear end of the floor tunnel portion to a fixed vehicle member in any of the mounting region of the power storage device and the step portion in a bridging manner. The vehicle structure according to any one of claims 1 to 5,
A pair of left and right inner members that are joined to lower surfaces of a pair of left and right base ends of a floor tunnel portion provided on the floor portion and extending in the vehicle front-rear direction, and extending in the vehicle front-rear direction,
A vehicle structure in which the rear ends of the pair of inner members are spaced apart from the mounting area of the power storage device and the step portion toward the front side of the vehicle in the vehicle front-rear direction.

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