JP2020142588A - Vehicle lower section structure - Google Patents

Abstract

To obtain a vehicle lower section structure capable of effectively absorbing impact energy during a side collision of a vehicle.SOLUTION: A share panel 76 is connected to an upper end 14 of a rocker 14 and a lower end 14B of the rocker 14 in a closed cross section 25 of the rocker 14. The share panel 76 is laid along a vehicle vertical direction through an impact absorbing section 62. Accordingly, a sectional collapse in the vehicle vertical direction of a vehicle 11 is suppressed, deformation of the impact absorbing section 62 due to a sectional collapse of the rocker 14 is suppressed, and each of a plurality of space sections 70 provided in the impact absorbing section 62 is deformed, thereby enabling effective reduction of an impact load input in the rocker 14 during a side collision of the vehicle 11.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle lower structure.

In Patent Document 1 below, the floor panels are arranged at both ends in the vehicle width direction and extend along the vehicle front-rear direction, respectively, and impact energy at the time of a side collision of the vehicle (hereinafter referred to as "vehicle side collision"). The technology related to the side sill (hereinafter referred to as "rocker") that absorbs energy is disclosed.

This rocker consists of a side sill outer (hereinafter referred to as "rocker outer panel") that constitutes the outside of the rocker in the vehicle width direction and a side sill inner (hereinafter referred to as "rocker inner panel") that constitutes the inside of the rocker in the vehicle width direction. , Is included. Further, the rocker is formed by the rocker outer panel and the rocker inner panel so that the cross-sectional shape when cut along the vehicle vertical direction and the vehicle width direction forms a closed cross-sectional structure (closed cross-sectional portion).

Then, in this prior art, a stiffener that divides the closed cross section of the rocker into the outside and the inside in the vehicle width direction of the rocker is connected to the upper end and the lower end of the rocker outer panel and the rocker inner panel. The stiffener prevents the closed cross section of the rocker from opening when the vehicle collides.

Further, in this prior art, a shock absorbing member having a cross-sectional shape of the stiffener when cut along the vertical direction of the vehicle and the width direction of the vehicle has an opening on the stiffener side is provided between the stiffeners. Is fixed to the outside and inside of the rocker in the vehicle width direction, respectively. Then, the shock absorbing member is crushed at the time of a side collision of the vehicle, so that the side collision load input to the rocker is reduced.

Japanese Unexamined Patent Publication No. 2017-226353

However, in the above prior art, the shock absorbing member is divided into the outside and the inside of the rocker in the vehicle width direction by the stiffener and is fixed to the stiffener, so that the deformation of the shock absorbing member is deformed at the time of the side collision of the vehicle. May be affected by the deformation of. Therefore, there is a possibility that the amount of shock energy absorbed originally obtained by the deformation of the shock absorbing member can be reduced.

In consideration of the above facts, an object of the present invention is to obtain a vehicle lower structure capable of improving the absorption performance of impact energy at the time of a side collision of the vehicle.

The vehicle lower structure according to the present invention according to claim 1 is arranged on both outer sides of the floor panel of the vehicle in the vehicle width direction, and the rockers extending along the vehicle front-rear direction are the vehicle widths of the rockers. A rocker outer panel constituting the outer side in the direction, a rocker inner panel forming an inner side in the vehicle width direction of the rocker and forming a closed cross section with the rocker outer panel, and the rocker outer panel and the rocker inner in the closed cross section. The shock absorbing portion, which is bridged between the panels along the vehicle width direction and has a plurality of space portions along the vehicle width direction, is connected to the upper end portion of the rocker and the lower end portion of the rocker, and is closed. In the cross-sectional portion, the share panel is bridged between the upper end portion of the rocker and the lower end portion of the rocker via the shock absorbing portion along the vehicle vertical direction.

In the vehicle lower structure according to the first aspect of the present invention, rockers arranged on both outer sides of the floor panel of the vehicle in the vehicle width direction extend along the vehicle front-rear direction. The rocker is configured to include a rocker outer panel forming the outer side in the vehicle width direction and a rocker inner panel forming the inner side in the vehicle width direction, and a closed cross section is formed by the rocker outer panel and the rocker inner panel. There is. In this closed cross-section, a shock absorbing portion is bridged between the rocker outer panel and the rocker inner panel along the vehicle width direction, and a plurality of space portions are provided in the shock absorbing portion along the vehicle width direction. It is provided.

Generally, from the viewpoint of protecting the vehicle interior, the rigidity inside the rocker in the vehicle width direction is high. Therefore, in the present invention, when a lateral impact load is input to the rocker at the time of lateral collision of the vehicle, a reaction force from the inside of the rocker in the vehicle width direction is obtained, and the rocker is deformed (elastic deformation, plastic deformation). Along with this, the partition walls forming the plurality of space portions provided in the shock absorbing portion are deformed and the impact energy is individually absorbed.

That is, unlike, for example, a configuration in which a plate material is simply laid between the rocker outer panel and the rocker inner panel along the vehicle width direction, in the present invention, the amount of deformation of the shock absorbing portion at the time of a side collision of the vehicle Can be increased. This makes it possible to increase the amount of impact energy absorbed and reduce the impact load.

Further, in the present invention, the share panel is connected to the upper end portion of the rocker and the lower end portion of the rocker. Then, the share panel is bridged along the vehicle vertical direction between the upper end portion of the rocker and the lower end portion of the rocker via the shock absorbing portion in the closed cross-sectional portion formed by the rocker outer panel and the rocker inner panel. ing.

In this way, in the closed cross section of the rocker, the share panel is bridged between the upper end of the rocker and the lower end of the rocker along the vehicle vertical direction, so that the share panel is placed in the closed cross section of the rocker. It acts as a member having a so-called tension function that stretches in the vertical direction. Therefore, in the present invention, the share panel suppresses the collapse of the rocker in the vertical direction of the vehicle (so-called cross-sectional collapse).

From the above, in the present invention, the cross-sectional collapse of the rocker in the vertical direction of the vehicle is suppressed, the deformation of the shock absorbing portion due to the cross-sectional collapse of the rocker is suppressed, and a plurality of space portions provided in the shock absorbing portion are individually provided. By making it deformable, it is possible to effectively reduce the impact load input to the rocker at the time of a side collision of the vehicle.

The vehicle lower structure according to the first aspect of the present invention has an excellent effect that the absorption performance of impact energy at the time of a side collision of the vehicle can be improved.

It is a schematic side view which shows the vehicle to which the vehicle lower structure which concerns on this embodiment is applied. It is sectional drawing when it cut along the line AA shown in FIG. It is a perspective view which looked at the rocker to which the vehicle lower structure which concerns on this Embodiment was applied from the front side in the vehicle front-rear direction and the inside in the vehicle width direction.

The vehicle lower structure according to the embodiment of the present invention will be described with reference to the drawings. The arrows FR, UP, and OUT, which are appropriately described in the respective drawings, are the front direction, the upward direction, and the outer direction in the vehicle width direction of the vehicle to which the vehicle floor structure according to the embodiment of the present invention is applied, respectively. Is shown.

<Structure of vehicle substructure>
First, the configuration of the vehicle lower structure according to the present embodiment will be described.

FIG. 1 shows a plan view of the vehicle lower portion 10 to which the vehicle lower structure according to the present embodiment is applied. As shown in this figure, in the present embodiment, the floor panel 12 extends in the vehicle lower portion 10 along the vehicle width direction and the vehicle front-rear direction. Bead portions 12A are intermittently projected from the floor panel 12 along the vehicle front-rear direction, and a plurality of bead portions 12A are arranged along the vehicle width direction. By forming the bead portion 12A, the rigidity of the floor panel 12 itself is improved.

Further, rockers 14 and 16 extend along the vehicle front-rear direction at both ends of the floor panel 12 in the vehicle width direction, and the vehicle is placed on the floor panel 12 between the rocker 14 and the rocker 16. The floor cross member 18 is bridged along the width direction. The floor cross member 18 is arranged between the bead portion 12A and the bead portion 12A arranged along the vehicle front-rear direction.

Further, in the present embodiment, as shown in FIG. 2, a battery pack (rechargeable battery) 20 is arranged on the lower side of the floor panel 12 as a driving force supply device for supplying electric power to a power unit such as a motor. Has been done. Note that FIG. 2 shows a cross-sectional view of FIG. 1 when cut along the line AA.

(Rocka)
Here, as shown in FIG. 1, rockers 14 and 16 extend along the vehicle front-rear direction at both ends of the floor panel 12 in the vehicle width direction. The rockers 14 and 16 will be described below. Since the rocker 16 has substantially the same configuration as the rocker 14, the description thereof will be omitted.

As shown in FIGS. 2 and 3, in the present embodiment, the rocker 14 is formed of, for example, a steel plate, and is located outside the rocker outer panel 22 in the vehicle width direction and inside in the vehicle width direction. It is configured to include a rocker inner panel 24.

Then, in the rocker 14, the rocker outer panel 22 and the rocker inner panel 24 are integrated by spot welding or the like, and a closed cross-sectional portion 25 is formed between the rocker outer panel 22 and the rocker inner panel 24. Note that FIG. 3 shows a perspective view of the rocker 14 as viewed from the front side in the vehicle front-rear direction and from the inside in the vehicle width direction.

(Rocka outer panel)
As shown in FIG. 2, the rocker outer panel 22 is a substantially hat type having a rocker inner panel 24 side (inside in the vehicle width direction) as an opening side in a cross-sectional shape cut along the vehicle vertical direction and the vehicle width direction. It is in the shape. The rocker outer panel 22 has a main body 26, an upper flange 28 extending upward from the upper end 26A of the main body 26 in the vertical direction of the vehicle, and a lower side of the lower end 26B of the main body 26 in the vertical direction of the vehicle. It is configured to include a lower flange portion 30 extending toward the direction.

The main body 26 of the rocker outer panel 22 includes an outer wall 32 formed along the vehicle vertical direction. The outer wall portion 32 is configured to include an upper outer wall portion 32A forming the upper portion of the outer wall portion 32 in the vehicle vertical direction and a lower outer wall portion 32B forming the lower portion of the outer wall portion 32 in the vehicle vertical direction. The lower outer wall portion 32B is arranged outside the upper outer wall portion 32A in the vehicle width direction.

An inclined portion 34 connecting the upper outer wall portion 32A and the lower outer wall portion 32B is provided at the central portion of the outer wall portion 32 in the vertical direction of the vehicle. The inclined portion 34 is formed so as to be inclined outward in the vehicle width direction from the lower end 32A1 of the upper outer wall portion 32A toward the lower side in the vehicle vertical direction and connected to the upper end 32B1 of the lower outer wall portion 32B.

Further, an upper wall portion 36 extending substantially horizontally toward the rocker inner panel 24 side is provided from the upper end 32A2 of the upper outer wall portion 32A of the rocker outer panel 22, and the inner end (main body) of the upper wall portion 36 is provided. The upper flange portion 28 extends from the upper end 26A) of the portion 26. A lower end portion of a center pillar (not shown) is coupled to the upper flange portion 28.

Further, from the lower end 32B2 of the lower outer wall portion 32B of the rocker outer panel 22, an inclined lower wall portion 38 that inclines downward in the vertical direction of the vehicle toward the rocker inner panel 24 side is provided, and the inclined portion 34 is provided. The lower flange portion 30 extends from the inner end (lower end 26B of the main body portion 26).

(Rocka Inner Panel)
On the other hand, the rocker inner panel 24 has a substantially hat shape with the rocker outer panel 22 side (outside in the vehicle width direction) as the opening side in a cross-sectional shape cut along the vehicle vertical direction and the vehicle width direction. .. The rocker inner panel 24 has a main body 40, an upper flange 42 extending upward from the upper end 40A of the main body 40 in the vertical direction of the vehicle, and a lower end 40B of the main body 40 in the vertical direction of the vehicle. It is configured to include a lower flange portion 44 extending toward the side.

The main body 40 of the rocker inner panel 24 includes an outer wall 46 formed along the vertical direction of the vehicle. The outer wall portion 46 includes an upper outer wall portion 46A constituting the upper portion of the outer wall portion 46 in the vehicle vertical direction and a lower outer wall portion 46B forming the lower portion of the outer wall portion 46 in the vehicle vertical direction. The lower outer wall portion 46B is arranged inside the upper outer wall portion 46A in the vehicle width direction.

A horizontal wall portion 48 connecting the upper outer wall portion 46A and the lower outer wall portion 46B is provided on the upper side of the outer wall portion 46 in the vertical direction of the vehicle. The side wall portion 48 extends inward in the vehicle width direction from the lower end 46A1 of the upper outer wall portion 46A and is connected to the upper end 46B1 of the lower outer wall portion 46B.

Further, an upper wall portion 50 extending in a substantially horizontal direction toward the rocker outer panel 22 side is provided from the upper end 46A2 of the upper outer wall portion 46A of the rocker inner panel 24, and is provided outside the upper wall portion 50. The upper flange portion 42 extends from the end (upper end 40A of the main body portion 40). The upper flange portion 42 is coupled to the upper flange portion 28 formed on the rocker outer panel 22 by welding or the like (joining portion 52).

On the other hand, as described above, the floor cross member 18 is bridged between the rocker 14 and the rocker 16 (see FIG. 1) on the floor panel 12 along the vehicle width direction. The floor cross member 18 has a substantially hat shape with the floor panel 12 side as the opening side when cut along the vehicle vertical direction and the vehicle front-rear direction (see FIG. 3).

When the upper wall portion 18A constituting the upper part of the floor cross member 18 and the upper wall portion 50 of the rocker inner panel 24 are cut along the vehicle vertical direction and the vehicle front-rear direction as in the case of the floor cross member 18. The cross-sectional shape of the above is bridged by a connecting member 54 having a substantially hat shape with the floor panel 12 side as the opening side.

One end 54A in the longitudinal direction (vehicle width direction) of the connecting member 54 is coupled to one end 18A1 of the floor cross member 18, and the other end 54B in the longitudinal direction of the connecting member 54 extends from the rear portion of the connecting member 54. It is taken out and connected to the upper wall portion 50 of the rocker inner panel 24. The connecting member 54 is not always necessary, and one end 18A1 of the upper wall portion 18A of the floor cross member 18 may be connected to the upper wall portion 50 of the rocker inner panel 24.

Further, a lower wall portion 56 extending in a substantially horizontal direction toward the rocker outer panel 22 is provided from the lower end 46B2 of the lower outer wall portion 46B of the rocker inner panel 24. Then, the lower flange portion 44 extends from the outer end of the lower wall portion 56 (lower end 40B of the main body portion 40). The lower flange portion 44 is coupled to the lower flange portion 30 formed on the rocker outer panel 22 by welding or the like (joining portion 58). A fastener 60 can be inserted into the lower wall portion 56, and the fixing piece 20A provided on the battery pack 20 is fastened and fixed to the rocker 14 via the fastener 60.

Further, in the present embodiment, a ladder-like impact is provided between the lower outer wall portion 32B of the rocker outer panel 22 of the rocker 14 and the lower outer wall portion 46B of the rocker inner panel 24 at a position where the battery pack 20 is overlapped with the vehicle side view. The absorbing portion 62 is bridged along a substantially horizontal direction.

(Shock absorber)
Hereinafter, the shock absorbing unit 62 will be described.

As described above, in the present embodiment, the shock absorbing portion 62 is bridged between the lower outer wall portion 32B of the rocker outer panel 22 of the rocker 14 and the lower outer wall portion 46B of the rocker inner panel 24. As a result, the closed cross-section portion 25 of the rocker 14 is divided into an upper closed cross-section portion 63 and a lower closed cross-section portion 65 with the shock absorbing portion 62 in between.

The shock absorbing portion 62 constitutes the upper portion of the shock absorbing portion 62, and includes an upper wall portion 62A bridged between the lower outer wall portion 32B of the rocker outer panel 22 and the lower outer wall portion 46B of the rocker inner panel 24. ing. Further, the shock absorbing portion 62 constitutes the lower portion of the shock absorbing portion 62 and is provided substantially parallel to the upper wall portion 62A, and the lower outer wall portion 32B of the rocker outer panel 22 and the lower outer wall portion of the rocker inner panel 24 are provided. It is provided with a lower wall portion 62B bridged between 46B.

The outer end 62A1 of the upper wall portion 62A in the vehicle width direction and the outer end 62B1 of the lower wall portion 62B in the vehicle width direction are connected by the outer wall 62C. Further, the inner end 62A2 of the upper wall portion 62A in the vehicle width direction and the inner end 62B2 of the lower wall portion 62B in the vehicle width direction are connected by an inner side wall 62D. The upper wall portion 62A side of the inner side wall 62D is provided with a thick portion 64 protruding upward in the vehicle vertical direction, and the lower wall portion 62B side of the inner side wall 62D is provided in the vehicle vertical direction. A thick portion 66 is provided so as to project downward.

Further, the outer wall 62C and the inner side wall 62D of the shock absorbing portion 62 are bonded to, for example, the lower outer wall portion 32B of the rocker outer panel 22 and the lower outer wall portion 46B of the rocker inner panel 24, respectively, via an adhesive. To. In addition, it may be bonded by welding, and when the rocker 14 is formed of an aluminum alloy, the shock absorbing portion 62 may be integrally molded with the rocker 14.

Further, in the present embodiment, in the shock absorbing portion 62, between the outer wall 62C and the inner side wall 62D, a plurality of partition walls 68A, 68B, 68C, 68D, 68E connecting the upper wall portion 62A and the lower wall portion 62B, 68F (6 in this case) is hung. In this way, by providing a plurality of partition walls 68 in the shock absorbing portion 62, a plurality of space portions 70A, 70B, 70C, 70D, 70E, 70F, 70G (here, seven) are provided in the shock absorbing portion 62. ) Is provided.

Here, the partition wall 68C is arranged on a substantially straight line connecting the joint portion 52 and the joint portion 58 to which the rocker outer panel 22 and the rocker inner panel 24 are joined. Further, the upper flange portion 72 extends on the extension line of the partition wall 68C from the upper wall portion 62A of the shock absorbing portion 62, and the upper flange portion 72 extends on the extension line of the partition wall 68C from the lower wall portion 62B of the shock absorbing portion 62. The lower flange portion 74 extends to the surface.

(Share panel)
Further, the share panel 76 will be described.

The share panel 76 has, for example, a rectangular plate formed of a steel plate, and 25 in the closed cross section of the rocker 14 is partitioned in the vehicle width direction, and the vehicle front-rear direction is along the extending direction of the rocker 14. Is located in. As described above, the closed cross-section portion 25 of the rocker 14 is divided into an upper closed cross-section portion 63 and a lower closed cross-section portion 65 by the shock absorbing portion 62. Therefore, the share panel 76 is divided into a share panel upper portion 78 arranged on the upper closed cross section 63 side and a share panel lower portion 80 arranged on the lower closed cross section 65 side with the shock absorbing portion 62 in between. Has been done.

The upper end 78A of the share panel upper portion 78 in the vehicle vertical direction is coupled to the upper flange portion 28 and the upper flange portion 42 between the upper flange portion 28 of the rocker outer panel 22 and the upper flange portion 42 of the rocker inner panel 24. (Joining portion 52). Further, the lower end portion 78B of the upper portion 78 of the share panel in the vehicle vertical direction is coupled to the upper flange portion 72 of the shock absorbing portion 62 (joining portion 82).

On the other hand, the upper end portion 80A of the lower portion 80 of the share panel in the vehicle vertical direction is coupled to the lower flange portion 74 of the shock absorbing portion 62 (joining portion 84). Further, the lower end portion 80B of the share panel lower portion 80 in the vehicle vertical direction is coupled to the lower flange portion 30 and the lower flange portion 44 between the lower flange portion 30 of the rocker outer panel 22 and the lower flange portion 44 of the rocker inner panel 24. (Joint portion 58).

That is, the share panel 76 is coupled (coupling portions 52 and 58) to the upper end portion 14A of the rocker 14 and the lower end portion 14B of the rocker 14. That is, the share panel 76 is bridged in the closed cross-sectional portion 25 of the rocker 14 to the upper end portion 14A of the rocker 14 and the lower end portion 14B of the rocker 14 along the vehicle vertical direction via the shock absorbing portion 62. .. Further, the upper flange portion 78 of the share panel, the upper flange portion 72 of the shock absorbing portion 62, the partition wall 68C, the lower flange portion 74 of the shock absorbing portion 62, and the lower portion 80 of the share panel are connected in the vertical direction of the vehicle via the joint portions 82 and 84. They are arranged in a substantially straight line along the line.

(Action and effect of vehicle substructure)
Next, the action and effect of the vehicle lower structure according to the present embodiment will be described.

As shown in FIG. 2, in the present embodiment, the inside of the closed cross-section portion 25 formed by the rocker outer panel 22 forming the outside of the rocker 14 in the vehicle width direction and the rocker inner panel 24 forming the inside of the rocker 14 in the vehicle width direction. In, a shock absorbing portion 62 is bridged between the rocker outer panel 22 and the rocker inner panel 24 along the vehicle width direction. The shock absorbing portion 62 is provided with a plurality of space portions 70 along the vehicle width direction.

Generally, from the viewpoint of protecting the inside of the vehicle interior 86, the rigidity of the inside of the rocker 14 in the vehicle width direction is high. Therefore, when a lateral impact load is input to the rocker 14 at the time of a lateral collision of the vehicle 11, the rocker 14 obtains a reaction force from the battery pack 20 arranged inside the vehicle width direction of the rocker 14. Deform. Along with this, the partition walls 68 provided in the shock absorbing portion 62 are deformed, and the shock energy is individually absorbed.

That is, as a comparative example, although not shown, in the present embodiment, the vehicle 11 is different from the configuration in which the plate material is simply laid between the rocker outer panel 22 and the rocker inner panel 24 along the vehicle width direction. The amount of deformation of the shock absorbing portion 62 can be increased at the time of a side collision. This makes it possible to increase the amount of impact energy absorbed and reduce the impact load.

Further, in the present embodiment, in the closed cross-sectional portion 25 formed by the rocker outer panel 22 and the rocker inner panel 24, the share panel 76 is coupled to the upper end portion 14A of the rocker 14 and the lower end portion 14B of the rocker 14. The share panel 76 is bridged along the vehicle vertical direction via the shock absorbing unit 62.

Specifically, the upper end portion 78A of the share panel upper portion 78 is coupled to the upper flange portion 28 of the rocker outer panel 22 and the upper flange portion 42 of the rocker inner panel 24 via the joint portion 52, and the upper end portion 78A of the share panel upper portion 78 is connected. The lower end portion 78B is coupled to the upper flange portion 72 of the shock absorbing portion 62 via the coupling portion 82.

Further, the upper end 80A of the share panel lower portion 80 is coupled to the lower flange portion 74 of the shock absorbing portion 62 via the coupling portion 84, and the lower end portion 80B of the share panel lower portion 80 is coupled to the lower flange portion 74 of the shock absorbing portion 62 via the coupling portion 58. It is coupled to the lower flange portion 30 of the outer panel 22 and the lower flange portion 44 of the rocker inner panel 24 (joining portion 58).

That is, the upper end portion 14A of the rocker 14 and the lower end portion 14B of the rocker 14 are joined (combined) with the upper end portion 78A of the share panel 76 (share panel upper portion 78) and the lower end portion 80B of the share panel 76 (share panel lower portion 80), respectively. Part 52, 58). As a result, the closed cross-section portion 25 of the rocker 14 can be prevented from being opened at the time of a side collision of the vehicle 11.

Further, in the present embodiment, the upper portion 78 of the share panel, the upper flange portion 72 of the shock absorbing portion 62, the partition wall 68C, the lower flange portion 74 of the shock absorbing portion 62 and the lower portion 80 of the share panel are connected via the joint portions 82 and 84. , It is arranged in a substantially straight line along the vertical direction of the vehicle.

In this way, in the closed cross-section portion 25 of the rocker 14, the share panel 76 is bridged between the upper end portion 14A of the rocker 14 and the lower end portion 14B of the rocker 14 along the vehicle vertical direction via the shock absorbing portion 62. By doing so, the impact load due to the rollover of the vehicle 11 or the like can be transmitted along the vehicle vertical direction through the share panel 76.

Further, the share panel 76 is bridged between the upper end portion 14A of the rocker 14 and the lower end portion 14B of the rocker 14 along the vehicle vertical direction, so that the share panel 76 is stretched in the vehicle vertical direction at the rocker 14. , Acts as a member having a so-called tension function.

Therefore, in the present embodiment, the share panel 76 suppresses the collapse of the rocker 14 in the vertical direction of the vehicle (so-called cross-sectional collapse). That is, it is possible to suppress a so-called roof crash in which the ceiling of the vehicle 11 is crushed by rollover of the vehicle 11.

From the above, in the present embodiment, a plurality of shock absorbing portions 62 are provided in the present embodiment by suppressing the cross-sectional collapse of the vehicle 11 in the vehicle vertical direction and suppressing the deformation of the shock absorbing portion 62 due to the cross-sectional collapse of the rocker 14. By deforming each of the space portions 70 of the above, it is possible to effectively reduce the impact load input to the rocker 14 at the time of a side collision of the vehicle 11.

(Supplement to this embodiment)
In the present embodiment, the rocker outer panel 22 and the rocker inner panel 24 shown in FIG. 2 are made of a steel plate, but may be made of a light metal such as an aluminum alloy. However, in this case, the rocker 14 is formed by extrusion processing, drawing processing, or the like, and the rocker outer panel 22 and the rocker inner panel 24 do not necessarily have to be separate members.

When the shock absorbing portion 62 and the share panel 76 are formed of the same light metal as the rocker 14 such as an aluminum alloy, the rocker outer panel 22 and the rocker inner panel 24 can be integrally molded.

Further, in the present embodiment, the shape and plate thickness of each member such as the rocker outer panel 22, the rocker inner panel 24, and the shock absorbing portion 62, which are composed of the rocker 14, are not particularly limited. Therefore, the shape and plate thickness of each member may be changed, or the plate thickness of one member may be changed for each part.

Although an example of the embodiment of the present invention has been described above, the embodiment of the present invention is not limited to the above, and one embodiment and various modifications may be used in combination as appropriate, and the present invention may be used. It goes without saying that it can be carried out in various modes as long as it does not deviate from the gist of.

10 Lower part of vehicle 11 Vehicle 12 Floor panel 14 Rocker 14A Upper end (upper end of rocker)
14B lower end (lower end of rocker)
16 Rocker 22 Rocker Outer Panel 24 Rocker Inner Panel 25 Closed Cross Section 62 Shock Absorber 70 Space 76 Share Panel 78 Share Panel Top (Share Panel)
80 Share panel bottom (share panel)

Claims (1)

The rockers, which are arranged on both outer sides of the floor panel of the vehicle in the vehicle width direction and extend along the vehicle front-rear direction, are
The rocker outer panel constituting the outer side of the rocker in the vehicle width direction,
A rocker inner panel that constitutes the inside of the rocker in the vehicle width direction and forms a closed cross section with the rocker outer panel.
A shock absorbing portion that is bridged between the rocker outer panel and the rocker inner panel in the closed cross section along the vehicle width direction and is provided with a plurality of space portions along the vehicle width direction.
It is coupled to the upper end of the rocker and the lower end of the rocker, and is bridged in the closed cross-section between the upper end of the rocker and the lower end of the rocker along the vehicle vertical direction via the shock absorbing portion. Share panel and
Vehicle substructure that is configured to include.