JP2019166851A - Vehicle body structure dealing with side surface impact - Google Patents

Abstract

To preferably deal with various impact input to a side surface in a vehicle body.SOLUTION: A vehicle body structure dealing with a side surface impact includes: side sills 11 extending in a fore and aft direction at a height of a floor panel 16 along an outer edge of a vehicle cabin 3 of a vehicle body 2; pillars 14 erected upward from the side sills 11; and cross members 17, 22 which are provided below the floor panel 16 so as to extend in a vehicle width direction at the inner side of the side sills 11. The side sill 11 forms a hollow closed cross section structure. Reinforcement members 18, 19 extending along the fore and aft direction are provided at a lower part and an inner upper part of the hollow side sill 11. The cross members 17, 22 are provided adjacent to or in proximity to the inner side of the side sill 11 so as to be located at the inner side of the reinforcement members 18, 19 as seen in the vehicle width direction at a height corresponding to the side sill 11 in an area ranging from the lower part to an upper part of the side sill 11.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle body structure corresponding to a side impact.

Patent Document 1 discloses a vehicle body structure in which a reinforcing member is provided inside a pillar.
Thereby, when another automobile hits the pillar, the rigidity can be increased so that the pillar is difficult to bend inward.

JP 2014-080182 A

However, even if the reinforcing member is provided inside the pillar as in Patent Document 1, for example, when the utility pole directly collides with the side sill at a position shifted from the pillar position, the reinforcing member of the pillar does not function, The side sill will be deformed inward.
Therefore, it is conceivable to provide a reinforcing member in the side sill as well as the pillar.
However, when a reinforcing member is provided inside the side sill, the rigidity of the side sill increases so that it is difficult to deform, and as a result, when another automobile hits the pillar, the connection between the pillar and the side sill is peeled off. there is a possibility.

As described above, the vehicle body is required to be able to appropriately cope with impact inputs to various side surfaces.
In particular, in the car body, while improving the response performance to the input of impact directly to the side sill, it is possible to ensure the response performance to impact when other automobiles that may be impacted hit the pillar It has been demanded.

  A vehicle body structure corresponding to a side impact according to the present invention includes a side sill extending in the front-rear direction at the height of the floor panel along the outer edge of the vehicle body casing, a pillar standing upward from the side sill, A cross member provided on the lower side of the floor panel so as to extend in the vehicle width direction on the inside, and the side sill is formed in a hollow closed cross-sectional structure, and a lower portion and an inner upper portion of the hollow side sill A reinforcing member extending in the front-rear direction is provided, and the cross member is positioned at an inner side in the vehicle width direction of the reinforcing member at a height corresponding to the side sill from a lower part to an upper part of the side sill. Are provided adjacent to or adjacent to the inside of the side sill.

  Preferably, the side sill has a stepped inner surface shape such that the upper part is on the inner side of the lower part, and the upper part of the reinforcing member extends along the stepped inner surface shape of the side sill. The lower part of the cross member is disposed outside the upper part of the cross member along the stepped inner surface shape of the side sill, and the reinforcing member is disposed on the upper side of the lower part of the cross member. The upper part of the member may be located.

  Preferably, the reinforcing member includes a lower reinforcing member disposed at a lower portion of the hollow side sill and an upper reinforcing member disposed at an inner upper portion of the hollow side sill.

  Preferably, the cross member has a lower cross member disposed inside the lower reinforcing member and an upper cross member disposed inside the upper reinforcing member.

  Preferably, the lower cross member may be a module cross member provided in a battery module that is removably attached to the lower side of the floor panel.

  Preferably, the lower cross member of the battery module is connected to the upper reinforcing member and the lower reinforcing member.

  Preferably, the pillar has a base portion that covers the outside of the side sill, the base portion is joined to the side sill at an upper portion, and a portion provided at a lower portion of the side sill with respect to the reinforcing member includes the base portion and the base sill. It is good to be provided below the joining position with the outer surface of the side sill.

In the present invention, the side sill extending in the front-rear direction at the height of the floor panel along the outer edge of the passenger compartment of the vehicle body is formed in a hollow closed cross-sectional structure, and the reinforcing member provided in the inside is formed from the hollow lower portion to the inside. It extends along the front-rear direction over the top.
The reinforcing member is not provided inside the portion where the base covering the side sill and the pillar on the outside of the side sill overlap or are joined.
Moreover, the part provided in the lower part of the side sill about a reinforcement member is provided below the junction position of the base part which covers the outer side of the side sill about a pillar, and the outer surface of a side sill, for example.
Therefore, when another vehicle hits the pillar standing on the side of the passenger compartment by standing upward from the side sill and there is input from the side to bend the pillar inward, the outer upper part of the pillar and side sill Can absorb the impact by starting to be deformed inward as in the case where the reinforcing member is not provided. On the other hand, if, for example, a reinforcing member extending in the front-rear direction is provided on the hollow outer upper portion of the side sill, the side sill is hardly deformed inward as a whole with respect to side input. As a result, when the pillar is deformed inward, the pillar may come off from the side sill that is difficult to deform inward.
In addition, a reinforcing member extends along the front-rear direction on the lower and inner upper part of the side sill having a hollow closed cross-sectional structure, and the cross member has a height corresponding to the side sill from the lower part to the upper part of the side sill. It is provided adjacent to or adjacent to the inside of the side sill, and is located inside the vehicle width direction of the reinforcing member.
Therefore, for example, when the electric pole or the like directly collides with the side sill and the side sill is deformed to move inward, the deformation can be suppressed by the reinforcing member and the cross member. The impact from the side can be effectively released to the cross member.
As a result, according to the present invention, it is possible to secure the performance of responding to an impact when another automobile that may increase the impact hits the pillar while enhancing the performance of directly responding to the side sill.

FIG. 1 is an explanatory view schematically showing a vehicle body of an automobile according to an embodiment of the present invention. FIG. 2 is an explanatory diagram of a situation in which another automobile collides against the side surface of the vehicle body of FIG. FIG. 3 is an explanatory diagram of a situation where a utility pole collides with the side surface of the vehicle body of FIG. FIG. 4 is an explanatory diagram of a vehicle body structure corresponding to a side impact in the vehicle body of FIG. FIG. 5 is an explanatory view of a deformed state when another automobile collides with the vehicle body structure of FIG. FIG. 6 is an explanatory diagram of a deformed state in the vehicle body structure of the comparative example. FIG. 7 is an explanatory diagram of a modified example of the vehicle body structure.

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

FIG. 1 is an explanatory view schematically showing a vehicle body 2 of an automobile 1 according to an embodiment of the present invention. FIG. 1A is a side view of the vehicle body 2. FIG. 1B is a side view of the vehicle body 2.
The automobile 1 in FIG. 1 is an example of a vehicle. The automobile 1 has a passenger compartment 3 in the center of a vehicle body 2 in which an occupant rides.

As shown in FIG. 1A, frame members such as a side sill 11, a roof rail 12, an A pillar 13, a B pillar 14, and a C pillar 15 are provided on a side surface portion of the vehicle compartment 3 with respect to the vehicle body 2.
The side sill 11 extends in the front-rear direction at the height of the floor panel 16 along the outer edge of the passenger compartment 3.
The roof rail 12 extends in the front-rear direction along the outer edge of the passenger compartment 3 at the height of the roof.
The A pillar 13, the B pillar 14, and the C pillar 15 are arranged in the front-rear direction on the side surface of the vehicle body 2 and extend in the up-down direction.
The A pillar 13 is connected to the side sill 11 and the roof rail 12 while the B pillar 14 and the C pillar 15 are connected.
A front door (not shown) is disposed between the A pillar 13 and the B pillar 14 so as to be openable and closable.
A rear door (not shown) is arranged between the B pillar 14 and the C pillar 15 so as to be openable and closable.
The passenger opens and closes the front door or the rear door and gets in and out of the passenger compartment 3.

As shown in FIG. 1B, a battery module 20 is provided below the floor panel 16 of the vehicle body 2. The battery module 20 has a plurality of battery cells and the like. The automobile 1 can run with the driving force of the driving motor by operating the driving motor with the electric power stored in the battery cell.
The battery module 20 has a substantially cubic module case 21 that fits between the left and right side sills 11. The module case 21 has a plurality of module cross members 22 extending in the vehicle width direction. The battery module 20 is detachably attached to the lower side of the floor surface of the vehicle body 2 by a plurality of module cross members 22. The module cross member 22 attached to the vehicle body 2 can function as a cross member of the vehicle body 2 by being positioned between the left and right side sills 11.

By the way, the automobile 1 in FIG. 1 travels on a public road and may collide with the vehicle body 2 or the utility pole 62 of another automobile 61 while traveling.
It is desirable that the vehicle body 2 of the automobile 1 can protect an occupant in the passenger compartment 3 in various collisions.

FIG. 2 is an explanatory diagram of a situation in which another automobile 61 collides with the side surface of the vehicle body 2 in FIG.
In FIG. 2, the vehicle body 2 of another automobile 61 collides from the left direction toward the left side surface of the vehicle body 2.
In this case, in the vehicle body 2, an impact is input to the B pillar 14 at the height position of the front bumper of the other automobile 61.
For this reason, in the vehicle body 2, a reinforcing member may be provided inside the B pillar 14 so that the B pillar 14 is bent inward and does not easily enter the passenger compartment 3.

FIG. 3 is an explanatory diagram of a situation in which the utility pole 62 collides with the side surface of the vehicle body 2 in FIG.
In FIG. 3, the utility pole 62 collides with the left side surface of the vehicle body 2 that moves to slide to the right.
In this case, the utility pole 62 may collide with the side sill 11 at a position displaced forward and backward from the B pillar 14.
For this reason, in the vehicle body 2, similarly to the B pillar 14, it is conceivable to provide a reinforcing member inside the side sill 11.

However, when measures are taken individually for each of the plurality of types of collisions in the vehicle body 2, the following problems may occur.
That is, for example, when a reinforcing member is provided inside the side sill 11, the rigidity of the side sill 11 is naturally increased so that it is difficult to deform.
As a result, when another automobile 61 collides with the B pillar 14, a larger force is applied to the joint portion 43 by welding between the base portion 42 of the B pillar 14 and the side sill 11 than when no countermeasure is taken. The possibility that the joint portion 43 peels and breaks increases.
Thus, the vehicle body 2 is required to be able to cope with a plurality of types of impact inputs to the side surfaces.

FIG. 4 is an explanatory diagram of the structure of the vehicle body 2 corresponding to the side impact in the vehicle body 2 of FIG.
FIG. 4A is an explanatory view of the structure of the vehicle body 2 as viewed from the front. FIG. 4B is an explanatory view of the structure of the vehicle body 2 as viewed from the front upper side.
In FIG. 4, the side sill 11, the B pillar 14, the floor cross member 17, and the module cross member 22 of the battery module 20 are illustrated as skeleton members of the structure of the vehicle body 2.

The side sill 11 includes an inner hat member 31, an outer hat member 32, and a central plate 33.
The inner hat member 31 and the outer hat member 32 are long steel materials having a substantially hat-shaped cross section. The center plate 33 is a plate-shaped long steel material.
The inner hat member 31 and the outer hat member 32 are overlapped with each other so that the hat shapes face each other with the center plate 33 interposed therebetween, and are joined to each other by, for example, spot welding. As a result, a basic skeleton part 34 having a substantially rectangular cross-section is formed.
The side sill 11 is provided so as to extend in the front-rear direction along the outer edge of the passenger compartment 3 at the height of the floor panel 16 of the passenger compartment 3 so that the inner hat member 31 is inside the vehicle body 2.

Further, the side sill 11 has a lower protruding portion 35 that protrudes downward from the basic skeleton portion 34.
The lower protrusion 35 can be formed, for example, by causing the hat-shaped portion of the outer hat member 32 to protrude downward from the inner hat member 31.
In this case, the entire side sill 11 including the lower protruding portion 35 has a hollow closed cross-sectional structure.
The lower protrusion 35 protrudes downward so as to extend in the front-rear direction of the vehicle body 2 with a width that is narrower than the width in the vehicle width direction of the side sill 11 having a substantially rectangular cross section.
The lower protruding portion 35 protrudes downward from the height position of the floor cross member 17 or downward from the height position of the floor panel 16 of the passenger compartment 3.
Further, a main body lower surface 36 is formed on the inner side of the lower projecting portion 35 of the side sill 11 having a substantially rectangular cross-sectional shape.
As described above, the side sill 11 has a stepped inner surface shape such that the upper part of the basic skeleton part 34 protrudes inward rather than the lower part of the lower protrusion part 35.

The B pillar 14 is a columnar skeleton member having a hollow substantially square cross section. The B pillar 14 includes a pillar main body 41 standing upward from the side sill 11 and a base 42 protruding downward from the pillar main body 41.
The outer portion of the base portion 42 is joined to the upper outer surface of the basic skeleton portion 34 of the side sill 11 by, for example, spot welding in a state of covering the outer side of the basic skeleton portion 34 of the side sill 11.
The inner portion of the base portion 42 is joined to the upper inner surface of the basic skeleton portion 34 of the side sill 11 by, for example, spot welding in a state of covering the inner side of the basic skeleton portion 34 of the side sill 11.
Accordingly, the B pillar 14 is erected upward from the side sill 11 in a state where the base 42 is joined to the side sill 11.

  The floor cross member 17 is a skeleton member that is fixed to the lower side of the floor panel 16 of the passenger compartment 3. The floor cross member 17 is provided between the pair of side sills 11 provided on both sides of the vehicle body 2 so as to extend in the vehicle width direction. The end of the floor cross member 17 is located inside the basic skeleton 34 of the side sill 11. The floor cross member 17 may be joined to the basic skeleton 34 of the side sill 11 by, for example, spot welding.

The module cross member 22 is a cross member provided in the battery module 20 detachably attached to the lower side of the floor panel 16.
For example, the module cross member 22 is superposed on the lower side of the floor cross member 17 and screwed with the floor cross member 17 and a screw 56.
In the attached state, the end of the module cross member 22 is located adjacent to or close to the inside of the lower protrusion 35 of the side sill 11. The module cross member 22 extends in the vehicle width direction between the lower projecting portions 35 of the pair of side sills 11 provided on both sides of the vehicle body 2.
In this case, the end surface of the module cross member 22 functions as a load receiving surface 51 that faces the inner surface of the lower projecting portion 35 of the side sill 11.
Further, the height of the load receiving surface 51 which is the end surface of the module cross member 22 is slightly smaller than the inner surface of the lower projecting portion 35 of the side sill 11. As a result, when the side sill 11 is deformed inward, the module cross member 22 comes into contact with the entire load receiving surface 51 as an end surface thereof.
The load of the side sill 11 to be deformed inward can act on the entire end surface of the module cross member 22.
On the other hand, when a load is applied to a part of the load receiving surface 51 which is the end surface of the module cross member 22, the load receiving surface 51 of the module cross member 22 is partially deformed, and the module cross member 22 is It becomes difficult to use the rigidity of the direction input in order to receive the load of the side sill 11. In addition, if the height of the load receiving surface 51 of the module cross member 22 is equal to or less than the height of the inner surface of the lower projecting portion 35 of the side sill 11, it is considered that the same effect can be expected.

  In the present embodiment, a lower reinforcing member 18 and an upper reinforcing member 19 are provided on the lower and inner upper portions of the side sill 11 having a hollow closed cross-sectional structure.

The lower reinforcing member 18 and the upper reinforcing member 19 are steel materials having a substantially square section in size.
The lower reinforcing member 18 is disposed so as to be accommodated in the lower protruding portion 35 of the hollow side sill 11. The lower reinforcing member 18 is formed in an elongated shape so as to extend entirely from the front end to the rear end of the side sill 11. The lower reinforcing member 18 fits below the position of the joint portion 43 between the base portion 42 of the B pillar 14 and the upper outer surface of the side sill 11.
The module cross member 22 is disposed inside the lower reinforcing member 18. The end face in the vehicle width direction of the module cross member 22 is a height corresponding to the lower protrusion 35 of the side sill 11 and is located on the inner side of the lower reinforcing member 18 in the vehicle width direction. 35 adjacent to or in close proximity to the inside.

The upper reinforcing member 19 is disposed so as to fit in the inner upper portion of the hollow side sill 11. The upper reinforcing member 19 is formed in a long shape so as to extend entirely from the front end to the rear end of the side sill 11.
The floor cross member 17 is disposed inside the upper reinforcing member 19. The end frame in the vehicle width direction of the floor cross member 17 has a height corresponding to the basic frame portion 34 of the side sill 11 and is positioned on the inner side in the vehicle width direction of the upper reinforcing member 19. 34 adjacent to or in close proximity to the inside.
Thereby, the upper reinforcing member 19 is arranged inside the lower reinforcing member 18 along the stepped inner surface shape of the side sill 11.
Further, the module cross member 22 is arranged outside the floor cross member 17 along the stepped inner surface shape of the side sill 11.
The upper reinforcing member 19 is located above the module cross member 22.
Then, by providing the lower reinforcing member 18 and the upper reinforcing member 19 not on the entire inside of the side sill 11 having a closed cross-sectional structure but excluding the outer upper portion of the basic skeleton 34, the basic skeleton 34 of the side sill 11 is provided. It can be deformed in the same manner as when there is no reinforcing member.

The lower projecting portion 35 of the side sill 11 and the lower reinforcing member 18 accommodated in the side sill 11 are connected to the module cross member 22 by screws 56 with screws. As a result, the side sill 11 is less likely to be deformed inward so as to be displaced upward and downward of the module cross member 22 in the initial deformation.
Further, the module cross member 22 is screwed to the basic skeleton 34 and the upper reinforcing member 19 of the side sill 11 from below with a screw 56 on the lower surface 36 of the main body located inside the lower protruding portion 35.
By screwing the module cross member 22 and the side sill 11 in the direction intersecting the deformation direction of the side sill 11 in this way, the position of the module cross member 22 is changed to the side sill after the side sill 11 starts to deform. 11 can be maintained inside the lower projection 35.

For this reason, even when the utility pole 62 or the like collides with the joint 43 of the side sill 11 and the B pillar 14 as illustrated by the broken line arrow in FIG. However, the side sill 11 whose rigidity is improved by the reinforcing member 18 is difficult to be deformed.
In addition, when the side sill 11 is to be deformed, the side sill 11 is deformed so as to hit the entire load receiving surface 51 which is the end surface of the module cross member 22, and when the side sill 11 is further deformed, the side sill 11 is Supporting by the cross member 22, it can suppress that the side sill 11 itself deform | transforms large inside. Part of the force input to the side sill 11 is transmitted to the module cross member 22 and can be released from the module cross member 22.

FIG. 5 is an explanatory diagram of a deformed state when another automobile 61 collides with the vehicle body structure of FIG. FIG. 5A shows a state at the start of input when another automobile 61 starts to collide. FIG. 5B shows a state in which the deformation of the vehicle body 2 has progressed.
As shown in FIG. 5A, the other automobile 61 collides with the B pillar 14 at the bumper height position.
Thereby, the B pillar 14 starts to be deformed so as to be bent inward between the roof rail 12 and the side sill 11.
When the B pillar 14 that has started to deform further deforms inward due to the load of another automobile 61, as shown in FIG. 5B, the side sill 11 joined to the base 42 of the B pillar 14 has an upper portion thereof. The basic skeleton part 34 is deformed so as to be pulled upward inward and downward.
Accordingly, the B pillar 14 can be deformed inward while the joint between the base portion 42 and the side sill 11 is not broken.

FIG. 6 is an explanatory diagram of a deformed state in the vehicle body structure of the comparative example.
The comparative example of FIG. 6 is a deformed state corresponding to FIG.
The reinforcing member 60 of the comparative example is provided so as to fit in the entire outer portion of the side sill 11 having a closed cross-sectional structure having a substantially square cross-sectional shape.
In the case of this comparative example, by providing the reinforcing member 60, the rigidity of the side sill 11 is increased, and even when the utility pole 62 directly hits the side sill 11 as shown in FIG.
However, the rigidity of the upper part of the side sill 11 joined to the base 42 of the B pillar 14 is also improved by the reinforcing member 60.
Therefore, when another automobile 61 collides with the B pillar 14 as shown in FIG. 6, the upper part of the side sill 11 is hardly deformed inward due to the deformation of the B pillar 14.
As a result, an excessive tensile force acts on the joint portion 43 between the base portion 42 of the B pillar 14 and the side sill 11, and the joint portion 43 is easily broken.

As described above, in the present embodiment, the side sill 11 extending in the front-rear direction at the height of the floor panel 16 along the outer edge of the passenger compartment 3 of the vehicle body 2 is formed in a hollow closed cross-sectional structure, and the lower reinforcing member 18. And the upper reinforcement member 19 extends along the front-back direction from the hollow lower part to the inner upper part.
The lower reinforcing member 18 and the upper reinforcing member 19 are not provided inside the portion where the base portion 42 covering the side sill 11 and the pillars on the outside of the side sill 11 overlap or are joined.
Further, the lower reinforcing member 18 provided on the lower projecting portion 35 of the side sill 11 is provided, for example, below the position of the joint portion 43 between the base 42 covering the outside of the side sill 11 and the outer surface of the side sill 11 with respect to the B pillar 14. It is done.
Therefore, the base 42 is joined to the side sill 11, and the other automobile 61 collides with the B pillar 14 erected on the side surface of the compartment 3 by standing upward from the side sill 11, When there is an input from the side so as to bend, the outer upper parts of the B pillar 14 and the side sill 11 can start to be deformed inward as in the state where the reinforcing member is not provided. Thereby, an impact can be absorbed.
On the other hand, for example, if a reinforcing member extending along the front-rear direction is provided on the hollow outer upper portion of the side sill 11, the side sill 11 is hardly deformed inward as a whole with respect to side input.
As a result, when the B pillar 14 is deformed inward, the joint between the side sill 11 and the base portion 42 of the B pillar 14 is broken, and the B pillar 14 is detached from the side sill 11 which is hardly deformed inward and peeled off. there is a possibility.
Further, a lower reinforcing member 18 and an upper reinforcing member 19 are provided extending along the front-rear direction at the lower portion and the inner upper portion of the side sill 11 having a hollow closed cross-sectional structure. The end surfaces in the vehicle width direction of the module cross member 22 and the floor cross member 17 are provided at a height corresponding to the side sill 11 from the lower part to the upper part of the side sill 11, and are provided adjacent to or close to the inside of the side sill 11, The lower reinforcing member 18 and the upper reinforcing member 19 are located on the inner side in the vehicle width direction. Therefore, for example, when the electric pole 62 or the like directly collides with the side sill 11, the side sill 11 is deformed so that the side sill 11 moves inward, and the deformation is changed to the lower reinforcing member 18, the upper reinforcing member 19, the module cross member 22, and the floor cross member. 17. The impact from the side can be effectively released to the module cross member 22 and the floor cross member 17.
As a result, in the present invention, when another automobile 61 collides with the side surface of the vehicle body 2, the B pillar 14 is prevented from being detached from the side sill 11, and the impact is deformed to the B pillar 14 and the side sill 11. In addition, when the utility pole 62 or the like directly collides with the side sill 11 on the side surface of the vehicle body 2, the impact is absorbed by the module cross member 22 and the floor cross member 17 through the lower reinforcing member 18 and the upper reinforcing member 19. Can effectively escape. It can respond suitably to the impact input to various side surfaces.

In the present embodiment, the side sill 11 has a stepped inner surface shape so that the upper part is on the inner side from the lower part, and the upper reinforcing member 19 is formed along the stepped inner surface shape of the side sill 11 from the lower reinforcing member 18. Arranged inside. The module cross member 22 is disposed outside the floor cross member 17 along the stepped inner surface shape of the side sill 11.
As a result, the upper reinforcing member 19 is positioned above the module cross member 22. The upper reinforcing member 19 overlaps the upper side of the module cross member 22 and hardly shifts in the vertical direction. As a result, the upper reinforcing member 19 is held on the upper side of the module cross member 22 and can function as a portion where the floor cross member 17 extends to the inside of the side sill 11. By substantially realizing a structure in which the floor cross member 17 extends outward to the inside of the side sill 11, it is assumed that an impact is directly input to the side sill 11 on the side surface of the vehicle body 2 by the electric pole 62 or the like. However, the force can be effectively released from the early stage where the deformation of the side sill 11 starts to the cross member substantially extended outward.

In the present embodiment, the reinforcing member is disposed so as to be accommodated in the lower reinforcing member 18 disposed so as to be accommodated in the lower projecting portion 35 at the lower portion of the hollow side sill 11 and the basic skeleton portion 34 in the inner upper portion of the hollow side sill 11. And an upper reinforcing member 19 to be formed.
By thus providing the reinforcing members separately in the upper and lower directions, the lower reinforcing member 18 and the upper reinforcing member 19 can function separately with respect to an impact. In particular, by setting the outer surface of the upper reinforcing member 19 to the inside of the outer surface of the lower reinforcing member 18, the reinforcing member can function as a two-stage shock absorbing structure separately on the upper and lower sides.

  In the present embodiment, the cross member includes a lower module cross member 22 disposed inside the lower reinforcing member 18 and an upper floor cross member 17 disposed inside the upper reinforcing member 19. Thereby, it can be made to function as an impact-absorbing structure independent in two steps, coupled with the fact that the reinforcing member is divided into upper and lower parts.

In the present embodiment, the lower module cross member 22 is a module cross member 22 provided in the battery module 20 detachably attached to the lower side of the floor panel 16.
Therefore, in the present embodiment, in the vehicle body 2 having the battery module 20 under the floor, the module cross member 22 of the battery module 20 is provided adjacent to or in close proximity to the inside of the lower protruding portion 35 protruding downward from the side sill 11. Thus, it is possible to suitably cope with impact input to various side surfaces.

In the present embodiment, the module cross member 22 of the battery module 20 is connected to the upper reinforcing member 19 and the lower reinforcing member 18 by screwing.
Thereby, even if the entire side sill 11 is deformed inward, the possibility that the connection state between the module cross member 22 of the battery module 20 and the side sill 11 can be maintained is increased. It is possible to effectively prevent the battery module 20 from dropping off.

  The above embodiment is an example of a preferred embodiment of the present invention, but the present invention is not limited to this, and various modifications or changes can be made without departing from the scope of the invention.

  FIG. 7 is an explanatory diagram of a modified example of the vehicle body structure.

In FIG. 7A, the side sill 11 is composed of only the basic skeleton part 34 whose cross-sectional outer shape is substantially rectangular. And the lower reinforcement member 18 is provided in the lower part which becomes lower than the junction part 43 with the B pillar 14 about the side sill 11 of the hollow closed section structure. The upper reinforcing member 19 is provided in an inner portion of the side sill 11 having a hollow closed section structure. Inside the basic skeleton 34 of the side sill 11, a module cross member 22 that is wide in the vertical direction is provided. Even in this case, the upper part of the side sill 11 can be deformed inward by the deformation of the B pillar 14. Moreover, the module cross member 22 is positioned inside the reinforcing member 18, and the inward deformation of the side sill 11 can be suppressed by the module cross member 22.
The lower reinforcing member 18 and the upper reinforcing member 19 may be provided as an integrated reinforcing member 71 as shown in FIG.
Further, as shown in FIG. 7C, the lower reinforcing member 18 may be provided in the inner lower portion of the side sill 11 having a hollow closed cross-sectional structure.

  In FIG. 7 (D), the side sill 11 is composed of only a basic skeleton part 34 that is a vertically long substantially square. And the lower reinforcement member 18 is provided in the part extended downward about the side sill 11 of a hollow closed cross-section structure. The upper reinforcing member 19 is provided in an inner portion of the side sill 11 having a hollow closed section structure. Further, a floor cross member 17 is separately provided inside the upper portion of the side sill 11. Even in this case, the upper part of the side sill 11 can be deformed inward by the deformation of the B pillar 14. Moreover, the module cross member 22 is positioned inside the reinforcing member 18, and the inward deformation of the side sill 11 can be suppressed by the module cross member 22.

FIG. 7E is shown for comparison in FIG. 7 and has the same structure of the vehicle body 2 as that of the above embodiment.
Note that a module cross member 22 that is wide in the vertical direction may be provided inside the basic skeleton 34 of the side sill 11 as shown in FIG.

  In FIG. 7G, the side sill 11 has an inner projecting portion 37 projecting to the inside of the basic skeleton portion 34 together with a lower projecting portion 35 projecting to the lower side of the basic skeleton portion 34 having a substantially rectangular shape. And the side sill 11 is formed in the closed cross-section structure in the whole basic skeleton part 34, the lower protrusion part 35, and the inner protrusion part 37. As shown in FIG. The side sill 11 has a three-step inner shape. The lower reinforcing member 18 is provided in the lower protruding portion 35 of the side sill 11 having a hollow closed section structure. Moreover, the module cross member 22 is positioned inside the reinforcing member 18, and the inward deformation of the side sill 11 can be suppressed by the module cross member 22. The upper reinforcing member 19 is provided so as to be accommodated in the inner portion of the basic skeleton 34 and the inner protrusion 37 of the side sill 11 having a hollow closed cross-sectional structure. The floor cross member 17 is provided inside the inner protruding portion 37.

In FIG. 7H, the base portion 42 of the B pillar 14 is formed to extend to the lower portion of the side sill 11 so as to cover the outside of the side sill 11. Except this, it is the same as FIG. Even in this case, the upper portion of the side sill 11 can be deformed in accordance with the deformation of the B pillar 14 by using the joint portion 43 between the base portion 42 of the B pillar 14 and the side sill 11 as the upper outer surface of the side sill 11.
And also in each modification shown in FIG. 7, the effect similar to this embodiment can be anticipated.

DESCRIPTION OF SYMBOLS 1 ... Automobile (vehicle), 2 ... Vehicle body, 3 ... Cabin, 11 ... Side sill, 12 ... Roof rail, 13 ... A pillar, 14 ... B pillar (pillar), 15 ... C pillar, 16 ... Floor panel, 17 ... Floor Cross member, 18 ... lower reinforcing member, 19 ... upper reinforcing member, 20 ... battery module, 21 ... module case, 22 ... module cross member, 31 ... inner hat member, 32 ... outer hat member, 33 ... central plate, 34 ... Basic skeleton 35, lower projecting portion 36 ... bottom surface of main body 37 ... inner projecting portion 41 ... pillar main body 42 ... base portion 43 ... joint portion 51 ... load receiving surface 56 ... screw 60 ... reinforcing member 61 ... Other automobiles, 62 ... Telephone poles, 71 ... Integrated reinforcing member

Claims (7)

A side sill extending in the front-rear direction at the height of the floor panel along the outer edge of the casing of the vehicle body;
A pillar standing upward from the side sill;
A cross member provided on the lower side of the floor panel so as to extend in the vehicle width direction inside the side sill;
Have
The side sill is formed into a hollow closed cross-sectional structure, and a reinforcing member is provided that extends along the front-rear direction in the lower part and the inner upper part of the hollow side sill,
The cross member is adjacent to or adjacent to the inside of the side sill such that the cross member is at a height corresponding to the side sill from the lower part to the upper part of the side sill and is located on the inner side in the vehicle width direction of the reinforcing member. Provided,
Body structure for side impact.
The side sill has a stepped inner surface shape such that the upper part is on the inner side than the lower part,
The upper part of the reinforcing member is arranged inside the lower part of the reinforcing member along the stepped inner surface shape of the side sill,
The lower part of the cross member is disposed outside the upper part of the cross member along the stepped inner surface shape of the side sill,
The upper part of the reinforcing member is located above the lower part of the cross member.
The vehicle body structure corresponding to a side impact according to claim 1.
The reinforcing member includes a lower reinforcing member disposed at a lower portion of the hollow side sill, and an upper reinforcing member disposed at an inner upper portion of the hollow side sill.
The vehicle body structure corresponding to a side impact according to claim 1 or 2.
The cross member includes a lower cross member disposed inside the lower reinforcing member, and an upper cross member disposed inside the upper reinforcing member.
The vehicle body structure for side impact according to claim 3.
The lower cross member is a module cross member provided in a battery module that is detachably attached to the lower side of the floor panel.
The vehicle body structure for side impact according to claim 4.
The lower cross member of the battery module is connected to the upper reinforcing member and the lower reinforcing member;
The vehicle body structure corresponding to a side impact according to claim 5.
The pillar has a base portion that covers the outside of the side sill,
The base is joined to the side sill at the top;
The portion provided at the lower part of the side sill for the reinforcing member is provided below the joining position of the base and the outer surface of the side sill.
The vehicle body structure for side impact according to any one of claims 1 to 6.

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