JP2020097350A - Vehicle side part structure - Google Patents

Abstract

To restrict an amount that a side sill enters the inside of a vehicle, by hindering displacement, in a vehicle vertical direction, of a side sill, resulting from load in a vehicle width direction, and by causing a side member, etc. to transmit load.SOLUTION: A vehicle side part structure comprises: a pair of side members 2, left and right, provided on a lower surface of a floor panel 1; a pair of side sills 3, left and right, provided on respective vehicle outsides of the side members 2; and an upper cross member 4 on a floor, provided on an upper surface of the floor panel 1 and coupling the side sills 3. Each side sill 3 is composed of an inner panel 31 and an outer panel 32, and an impact absorbing member 5 is provided in the side sill 3. A vehicle outside end 1a of the floor panel 1 has a joint portion 10 on a side-sill side. The side members 2 and the side sills 3 are adjacent in a vehicle width direction. At least part of each side member 2 is located overlapping the respective side sill 3, as viewed from a side of the vehicle. Each side member 2 has a first joint portion W1, which is joined to the respective side sill 3, and the first joint portion W1 is located overlapping an upper part, on the vehicle inside, of the impact absorption member 5 as viewed from a side of the vehicle.SELECTED DRAWING: Figure 2

Description

The present invention relates to a vehicle side structure.

In vehicles such as electric vehicles and ordinary vehicles, vehicle-mounted members such as a battery pack and a fuel tank are mounted, and the vehicle-mounted members are provided below the vehicle body floor or the like for convenience of layout. Therefore, in a vehicle such as an electric vehicle, it is necessary to take measures to avoid damage to the vehicle-mounted member particularly against an impact load at the time of a vehicle side collision.
Therefore, in a conventional vehicle, a shock absorbing member is additionally provided inside the side sill on the outside in the vehicle width direction, and a side member joined to the floor panel is provided at a position on the inside of the side sill on the vehicle side. By providing a battery frame (cross member) joined to the panel via a collar and a bracket, a structure is provided to prevent the battery frame supporting the battery pack and the like from being detached from the floor panel in the event of a side collision. (For example, see Patent Document 1).

JP, 2013-60160, A

However, in the above-described conventional vehicle side part structure, since the side member and the bracket are joined to the floor panel located inside the vehicle of the side sill, the high rigidity portion exists inside the vehicle of the side sill. There is a risk that the side sill may be displaced in the vehicle vertical direction with respect to the load in the vehicle width direction such that the side sill shifts in the vehicle vertical direction, resulting in insufficient load transmission and increasing the amount of penetration of the side sill into the vehicle.

The present invention has been made in view of such an actual situation, and an object thereof is to suppress deviation of a side sill in a vehicle vertical direction due to a load in a vehicle width direction applied at the time of a side collision, and to prevent a side member and a cross member on a floor. A vehicle side portion structure capable of efficiently transmitting a load in the vehicle width direction to the vehicle, improving load absorption performance in the vehicle width direction by the side sill, and suppressing the amount of the side sill entering the vehicle inside. ..

In order to solve the problems of the above-described conventional technology, the present invention provides a pair of left and right side members that are provided on the vehicle width direction side portion of the lower surface of the floor panel and extend in the vehicle front-rear direction, and the vehicle width direction outer side of the side members. And a cross member on the floor that is provided on the upper surface of the floor panel and that extends in the vehicle width direction and connects the pair of left and right side sills. A side sill inner panel on the vehicle inner side and a side sill outer panel on the vehicle outer side, a shock absorbing member is provided inside the side sill, and a vehicle outer end portion of the floor panel is joined to the side sill side sill side joint portion. In the vehicle side portion structure having, the side member and the side sill are arranged adjacent to each other in the vehicle width direction, and the side member is located at a position where at least a part of the side member overlaps with the side sill in the vehicle side view. The side member has a first joint portion that is joined to the side sill, and the first joint portion is arranged at a position that overlaps an upper portion of the impact absorbing member on the inner side of the vehicle in a vehicle side view. ..

As described above, the vehicle side portion structure according to the present invention is provided on the vehicle width direction side portion of the lower surface of the floor panel, and is provided on the vehicle width direction outer side of the pair of left and right side members extending in the vehicle front-rear direction. And a pair of left and right side sills extending in the vehicle front-rear direction and a cross member on the floor which is provided on the upper surface of the floor panel and extends in the vehicle width direction to connect the pair of left and right side sills. It is composed of an inner side sill inner panel and a vehicle outer side sill outer panel, a shock absorbing member is provided inside the side sill, and a vehicle outer end portion of the floor panel has a side sill side joint portion joined to the side sill. The side member and the side sill are arranged adjacent to each other in the vehicle width direction, the side member is arranged at a position where at least a part of the side member overlaps with the side view of the vehicle, and the side member is , A first joint portion joined to the side sill, and the first joint portion is arranged at a position overlapping an upper portion of the impact absorbing member inside the vehicle in a vehicle side view.
Therefore, in the vehicle side portion structure of the present invention, since the side sill is supported by the side member by joining the side member and the side sill in a state of being adjacent to each other, the load from the vehicle width direction by the side sill is obtained. The absorption performance can be improved. Further, in the vehicle side portion structure of the present invention, since the first joint portion of the side member is located above the floor panel in the vehicle vertical direction, the side sill is attached to the side member when the load is transmitted from the vehicle width direction. On the other hand, it is possible to prevent the vehicle from entering the inside of the vehicle while shifting in the vertical direction of the vehicle.

FIG. 3 is a perspective view of the floor panel, the side sill, and the upper cross member on the floor as seen from above the vehicle in the vehicle side structure according to the embodiment of the present invention. It is the sectional view on the AA line in FIG. FIG. 2 is a cross-sectional perspective view of the side sill and the upper cross member on the floor in FIG. 1 and its peripheral portion as viewed from above the vehicle. It is the perspective view which looked at the floor panel in Drawing 1 from the vehicles lower part.

Hereinafter, the present invention will be described in detail based on the illustrated embodiments.
In the figure, the arrow Fr direction indicates the front of the vehicle, and the arrow O direction indicates the vehicle width direction outer side. The arrow X direction indicates the vehicle width direction, and the arrow Y direction indicates the vehicle front-rear direction.

1 to 4 show a vehicle side portion structure according to an embodiment of the present invention. As shown in FIGS. 1 to 4, the vehicle side portion structure of the present embodiment is provided on the vehicle width direction side portion of the lower surface of the floor panel 1 that extends in the vehicle width direction and the vehicle front-rear direction, and extends in the vehicle front-rear direction. A pair of left and right side members 2, a pair of left and right side sills 3 which are provided outside the side members 2 in the vehicle width direction and extend in the vehicle front-rear direction, and a pair of left and right side members 3 which are provided on the upper surface of the floor panel 1 and extend in the vehicle width direction. And an upper cross member 4 on the floor for connecting the side sill 3 of FIG.
As shown in FIGS. 2 and 3, the side sill 3 of the present embodiment has a closed cross-section structure including a side sill inner panel 31 on the vehicle inner side and a side sill outer panel 32 on the vehicle outer side. The side sill outer panel 32 has a hat-shaped cross section in which openings are arranged so as to face each other and upper and lower end portions 31a, 31b, 32a, 32b are joined at substantially the same position in the vehicle width direction. Inside the side sill 3, a shock absorbing member 5 that absorbs a load applied to the side sill outer panel 32 and the like in the vehicle width direction is provided. Moreover, the vehicle outer end 1 a of the floor panel 1 has a side sill side joint 10 that is joined to the side sill inner panel 31 of the side sill 3. Since the vehicle outer end 1a of the floor panel 1 and the side sill inner panel 31 are joined together, the floor panel 1 is cut out at the joint with the upper cross member 4 on the floor. ..

In the vehicle side structure of the present embodiment, as shown in FIGS. 2 and 3, the side member 2 and the side sill 3 are arranged adjacent to each other in the vehicle width direction, and the side member 2 is at least the side sill 3 at least. Part of them are arranged in a position where they overlap when viewed from the side of the vehicle. The side member 2 in the vehicle side part structure of the present embodiment is provided at a position lower than the height position of the side sill 3 in the vehicle vertical direction. Further, the side member 2 has a first joint portion W1 joined to a side surface of the side sill inner panel 31 of the side sill 3, and the first joint portion W1 is a vehicle of the impact absorbing member 5 in a vehicle side view. It is located in a position that overlaps with the inner upper part. That is, the side member 2 and the side sill 3 are joined to each other via the first joining portion W1 in a state of being adjacent to each other. Here, the first joint W1 is arranged along the vehicle front-rear direction for joining the side member 2 and the side sill 3.
Therefore, the side sill 3 has a structure in which it is supported by the side member 2 against a load from the outside in the vehicle width direction, and the side sill 3 is configured to enhance the load absorbability from the outside in the vehicle width direction. The first joint W1 may be located at a position above the vehicle outer end 1a of the floor panel 1 in the vehicle.

As shown in FIGS. 1 to 3, the upper cross member 4 on the floor in the present embodiment is formed in a hat-shaped cross-section with the opening portion facing downward, and the flange portion 40 protruding in the vehicle front-rear direction is It is joined to the upper surface of the floor panel 1 and the side surface of the side sill inner panel 31. The upper cross member 4 on the floor includes a main body portion 41 on the vehicle inner side that extends along the central surface 11 of the floor panel 1, and an inclined portion 42 that extends downward in the vehicle from the vehicle inner side to the vehicle outer side in the vehicle width direction. Is equipped with. The inclined portion 42 has a second joint portion W2 joined to the side sill inner panel 31 of the side sill 3 at a vehicle width direction outer end portion 42a extending in the horizontal direction, and the second joint portion W2 is a side sill inner panel. It is located on the upper surface 31 c of 31.
As a result, the second joint W2 is joined to the side sill inner panel 31 from the vehicle upper side, the first joint W1 is joined to the side sill inner panel 31 from the vehicle width direction inner side, and the joints are positioned to intersect. Therefore, the side sill 3 is prevented from moving due to an impact load from the outside in the vehicle width direction. A seat bracket 43 is attached to the upper part of the upper cross member 4 on the floor.

As shown in FIGS. 2 and 3, the side member 2 of the present embodiment includes a planar lower surface 2a and inner and outer side walls that are located inside and outside the lower surface 2a in the vehicle width direction and that extend toward the upper side of the vehicle. It is formed in a substantially U-shaped cross section having 2b and 2c. Inside the side member 2, a reinforcement 21 is provided which is joined to the inner wall 2b and the outer wall 2c of the side member 2 and connects the inner and outer both side walls 2b, 2c. An upper closed cross section S1 configured by being combined with the floor panel 1 is provided on the upper side of the reinforcement 21. The upper closed cross section S1 is inside the side sill 3 when viewed from the side of the vehicle. It is arranged at a position overlapping with the impact absorbing member 5. With this arrangement, the upper closed cross-section S1 supports the shock absorbing member 5 against the load from the outside in the vehicle width direction, so that the load absorbing performance is promoted.

On the other hand, in the vehicle side portion structure of the present embodiment, the pair of left and right side members 2 extend below the pair of left and right side members 2 in the vehicle width direction as shown in FIGS. A lower cross member 6 under the floor is provided, and the lower cross member 6 under the floor is fixed to the side member 2 by a cylindrical fixing member 7 joined to the reinforcement 21 in the side member 2. Has been done. That is, the side member 2 is supported by the lower cross member 6 under the floor via the reinforcement 21 and the fixing member 7.
Therefore, the lower cross member 6 under the floor has a main body portion 61 having a closed cross-section structure in which a vehicle-mounted member described later is fixed by a fixing portion D, and a flange portion 62 fixed to the side member 2. The main body 61 is located at an intermediate portion of the lower cross member 6 in the vehicle width direction, and has a pair of upper and lower member bodies 61a and 61b which are vertically spaced from each other. The flange portion 62 is located at an outer end portion of the lower cross member 6 in the vehicle width direction, and a pair of upper and lower member bodies 61a are arranged so as to close an opening end of the main body portion 61 on the vehicle width direction outer side when the vehicle is viewed from the rear. , 61b.
Further, on the inner peripheral surface of the fixing member 7, a female screw that is screwed with a male screw of the shaft portion of the fastening bolt 71 that fastens the side member 2 and the lower cross member 6 is formed. The upper portion 7a of the fixing member 7 is projected above the mounting surface 21a through the mounting hole 21d, and is joined to the reinforcement 21 in a state where the intermediate portion 7c is in contact with the lower surface of the mounting surface 21a. The lower portion 7b of the fixing member 7 is joined onto the lower surface 2a of the side member 2.
Further, the reinforcement 21 is located above the lower surface 2a of the side member 2 and is joined to the left and right side walls 2b and 2c of the side member 2 and the mounting surface 21a which is spaced apart from the lower surface 2a. The mounting surface 21a is provided with a mounting hole 21d into which the upper portion of the fixing member 7 is inserted. The lower surface 2a of the side member 2 and the main body portion 61 and the flange portion 62 of the lower cross member 6 are fastened in correspondence with through holes 85 of the bracket member 8 and mounting holes 21d of the reinforcement 21 which will be described later. Insertion holes 2d, 61c, 62a for inserting the shaft portion of the bolt 71 are provided.
As a result, when an external load is input to the reinforcement 21 in the side member 2, the external load is transmitted from the fixing member 7 to the lower cross member 6 under the floor, and the load transmission and It has a structure that promotes dispersion.

Further, in the vehicle side portion structure of the present embodiment, the side member 2 and the flange portion 62 of the lower cross member 6 are fixed via the bracket member 8 as shown in FIGS. 2 and 3. By combining the bracket member 8 and the lower cross member 6, a lower closed cross-section S2 that enhances the rigidity around the fixed portion of the bracket member 8 is formed. The lower closed cross-section S2 is arranged at a position straddling the boundary region R between the main body 61 and the flange 62 of the lower cross member 6 in the vehicle width direction, and by this arrangement, the side member 2 and the lower cross. The position of the stress concentration portion of the fixed portion with the member 6 is displaced. Moreover, the bracket member 8 has a cross member side fixing portion 81 fixed to the main body portion 61 of the lower cross member 6 at a position on the inner side in the vehicle width direction.
The bracket member 8 of the present embodiment is formed in a quadrangular shape in a vehicle top view, and a side member side fixing portion 82 fixed to the lower surface 2a of the side member 2, and a vehicle width direction inner end of the side member side fixing portion 82. It has an inclined surface 83 extending from the portion to the cross member side fixed portion 81 and inclined downward toward the inside in the vehicle width direction. The side member side fixing portion 62 is provided with a through hole 85 through which the shaft portion of the fastening bolt 71 is inserted.
As a result, the load from the side member 2 is smoothly transmitted to the lower cross member 6 via the side member side fixing portion 82 of the bracket member 8 and the inclined surface 83, and local load concentration is suppressed. ing.

Further, in the vehicle side portion structure of the present embodiment, the lower cross member 6 under the floor is, as shown in FIGS. 2 and 3, in the vehicle width direction inner side in the boundary region R between the main body portion 61 and the flange portion 62. It has a bending portion 63 that bends toward. That is, the curved portion 63 is formed in a laterally placed substantially S-shape that is curved inward in the vehicle width direction from the flange portion 62 located on the upper side of the lower cross member 6 toward the lower member body 61b of the main body portion 61. The peripheral portion of the curved portion 63 is joined to the lower member body 61b of the main body portion 61. Due to the curved portion 63 having such a shape, the change in the sectional area of the total closed cross-section portion including the closed cross-section portion S2 on the bracket member 8 side and the closed cross-section portion of the main body portion 61 of the lower cross member 6 is reduced, and the total closed cross-section portion is closed. A structure that maintains the area of the cross section can be obtained.
Further, the curved portion 63 of the lower cross member 6 has rigidity with respect to the load in the vehicle vertical direction. Therefore, the curved portion 63 is arranged at a position overlapping the inclined surface 83 of the bracket member 8 in the vehicle width direction. Along with this, when the load concentrates on the portion where the bending portion 63 and the main body portion 61 are joined and deformation occurs, the bending portion 63 is arranged within the range of the inclined surface 83, so the inclined surface 83 The load is transmitted to the curved portion 63 to prevent the load from being concentrated on the curved portion 63.

In addition, between the bracket member 8 and the flange portion 62 of the lower cross member 6 of the present embodiment, as shown in FIGS. 2 and 3, fixing of the side member 2 and the lower cross member 4 is assisted. A cylindrical fixing auxiliary member 72 is provided. The fixing auxiliary member 72 can be arranged vertically between the side member side fixing portion 82 of the bracket member 8 and the upper member body 61a of the main body 61 of the lower cross member 6, and the upper and lower surfaces of the cylindrical body are side members. It has a vertical length capable of contacting the side fixing portion 82 and the upper member body 61a. Further, the fixing auxiliary member 72 has an inner diameter through which the fastening bolt 71 can be inserted. Moreover, the fixing member 7 and the auxiliary fixing member 72 are fastened by the fastening bolts 71, and have a structure that can utilize the rigidity of the fastening bolts 71 in the vehicle width direction. As a result, the load input from the side member 2 is transmitted to the lower cross member 6 via the fixing auxiliary member 72, and the distribution of the load is further promoted.

As shown in FIGS. 1 to 4, the floor panel 1 in the vehicle side structure of the present embodiment has a central surface 11 that bulges toward the upper side of the vehicle (inside the vehicle interior). Is formed in a quadrangular shape when viewed from above the vehicle in the vehicle interior. Further, the floor panel 1 of the present embodiment has an inclined surface 12 that inclines downward from the central surface 11 on the vehicle inner side toward the vehicle outer side in the vehicle width direction, and below the inclined surface 12 is the battery pack, the fuel. An in-vehicle member 100 such as a tank is mounted. On the other hand, on the inclined surface 12 of the floor panel 1, as shown in FIGS. 2 to 4, the vehicle outer end portion 9a of the floor reinforcing member 9 having the side member side joint portion 91 joined to the side member 2 is provided on the side member. 2 is joined with the inner side wall 2b of the floor reinforcing member 9 interposed therebetween, and the vehicle inner end 9b of the floor reinforcing member 9 is joined to the floor panel 1 at a position on the vehicle inner side of the inclined surface 12 (center surface 11). There is. Therefore, the floor reinforcing member 9 is arranged along the central surface 11 and the inclined surface 12 of the floor panel 1 while extending in the vehicle width direction.
That is, in the vehicle side portion structure of the present embodiment, when the load from the vehicle width direction outer side is input to the side member 2, the floor reinforcing member 9 suppresses the deformation of the inclined surface 12 of the floor panel 1 to the vehicle inner side. Therefore, the load is smoothly transmitted to the side member 2.

On the other hand, in the shock absorbing member 5 of the present embodiment, as shown in FIGS. 2 and 3, the openings are arranged to face each other, and the upper and lower end portions 51a, 51b, 52a, 52b are joined at substantially the same position in the vehicle width direction. The inner member 51 and the outer member 52 having a hat-shaped cross section, and the upper and lower intermediate portions 53a and 53b extending straight in the vehicle up-down direction between the upper and lower end portions 51a, 51b, 52a and 52b of the inner member 51 and the outer member 52. The central member 53 is sandwiched and joined in a state that the upper and lower portions 53c and 53d are sandwiched between the upper and lower end portions 31a and 31b of the side sill inner panel 31 and the upper and lower end portions 32a and 32b of the side sill outer panel 32. Have
Therefore, when the load in the vehicle width direction is input from the side sill outer panel 32 of the side sill 3 to the shock absorbing member 5, the inner member 51 and the outer member 52 are deformed substantially uniformly toward the vehicle inner side by the intervention of the central member 53. This means that the shock absorbing member 5 having high load absorbing performance is provided inside the side sill 3.

As described above, in the vehicle side portion structure according to the embodiment of the present invention, the pair of left and right side members 2 provided in the vehicle width direction side portion of the lower surface of the floor panel 1 and extending in the vehicle front-rear direction, and the vehicle of the side member 2 A pair of left and right side sills 3 that are provided on the outer side in the width direction and extend in the vehicle front-rear direction, and an upper cross member 4 on the floor that is provided on the upper surface of the floor panel 1 and that extends in the vehicle width direction and connects the pair of left and right side sills 3. Is equipped with. The side sill 3 includes a side sill inner panel 31 on the vehicle inner side and a side sill outer panel 32 on the vehicle outer side. A shock absorbing member 5 is provided inside the side sill 3, and the vehicle outer end 1a of the floor panel 1 is a side sill. It has a side sill side joint portion 10 to be joined to 3. The side member 2 and the side sill 3 are arranged adjacent to each other in the vehicle width direction, and the side member 2 is arranged at a position where at least a part of the side member 2 overlaps the side sill 3 in the vehicle side view. Moreover, the side member 2 has a first joint W1 that is joined to the side sill 3 and is arranged along the vehicle front-rear direction, and the first joint W1 is the vehicle of the impact absorbing member 5 when viewed from the side of the vehicle. It is arranged at a position having a portion overlapping with the inner upper portion.
Therefore, in the vehicle side portion structure of the present invention, the side member 2 and the side sill 3 are joined in a state of being adjacent to each other in the vehicle width direction, so that the side sill 3 on the vehicle outer side is supported by the side member 2 on the vehicle inner side. Since the structure is employed, the load absorbing performance of the side sill 3 in the vehicle width direction can be improved. Further, in the vehicle side structure of the present invention, since the first joint W1 of the side member 2 is located above the floor panel 1 in the vehicle vertical direction, the side sill 3 is applied when a load is input from the vehicle width direction. Of the side sill 2 in the vertical direction of the vehicle, efficiently transmitting the load to the side member 2 and the upper cross member 4 on the floor, and reducing the amount of the side sill 3 entering the inside of the vehicle. You can

Further, in the vehicle side portion structure of the present embodiment, the upper cross member 4 on the floor is provided with an inclined portion 42 that inclines downward toward the vehicle from the vehicle inner side to the vehicle outer side in the vehicle width direction. It has a second joint W2 joined to the side sill inner panel 31 at the widthwise outer end 42a, and the second joint W2 is located on the upper surface 31c of the side sill inner panel 31.
Therefore, in the vehicle side part structure of the present embodiment, the second joint W2 of the upper cross member 4 on the floor is joined to the upper surface 31c of the side sill inner panel 31 from the vehicle upper side, and the first joint W1 of the side member 2 is formed. Since the side sill inner panel 31 is joined to the side surface of the side sill inner panel 31 from the vehicle width direction inner side and the two joint portions W1 and W2 are arranged at positions intersecting with each other, movement of the side sill 3 due to impact load from the vehicle width direction outer side is prevented. It is possible to suppress, and it is possible to further improve the effect of absorbing the impact load by the side sill 3.

In the vehicle side structure of the present embodiment, the side member 2 has the inner side wall 2b and the outer side wall 2c, and the inside of the side member 2 is joined to the inner side wall 2b and the outer side wall 2c. A force 21 is provided. An upper closed cross section S1 configured by being combined with the floor panel 1 is provided on the upper side of the reinforcement 21. The upper closed cross section S1 is arranged at a position overlapping the impact absorbing member 5 in a vehicle side view. Has been done.
Therefore, according to the vehicle side portion structure of the present embodiment, the upper closed cross-section S1 can support the shock absorbing member 5 against a load from the outside in the vehicle width direction, and the load absorbing performance of the shock absorbing member 5 can be achieved. Can be further promoted.

Further, in the vehicle side structure of the present embodiment, a lower cross member 6 under the floor that extends in the vehicle width direction and connects the pair of left and right side members 2 is provided below the pair of left and right side members 2. The lower cross member 6 under the floor is fixed to the side member 2 by a fixing member 7 joined to the reinforcement 21.
Therefore, in the vehicle side portion structure of the present embodiment, when the impact load at the time of a side collision is input to the reinforcement 21 in the side member 2, this impact load is applied from the fixing member 7 to the lower cross member below the floor. 6, the load transmission performance can be promoted to enhance the load distribution effect, and the side member 2 can be supported more firmly than the conventional vehicle side part structure. ..

In the vehicle side structure of the present embodiment, the floor panel 1 has an inclined surface 12 that inclines downward from the vehicle inner side to the vehicle outer side in the vehicle width direction, and the vehicle-mounted member 100 is provided below the inclined surface 12. It is installed. On the other hand, the vehicle outer end 9a of the floor reinforcing member 9 having the side member side joint 91 that is joined to the side member 2 is joined to the inclined surface 12 of the floor panel 1, and the vehicle inner end of the floor reinforcing member 9 is joined. 9b is joined to the floor panel 1 at a position inside the vehicle with respect to the inclined surface 12.
Therefore, in the vehicle side portion structure of the present embodiment, when the load from the vehicle width direction is input to the side member 2, the floor reinforcing member 9 suppresses the deformation of the inclined surface 12 of the floor panel 1 toward the inside of the vehicle. Therefore, the load from the vehicle width direction is easily transmitted to the side member 2, and the load transmission in the vehicle width direction can be promoted.

Further, in the vehicle side portion structure of the present embodiment, the shock absorbing member 5 has a cross-section hat in which the openings are arranged to face each other and the upper and lower end portions 51a, 51b, 52a, 52b are joined at substantially the same position in the vehicle width direction. The mold-shaped inner member 51 and outer member 52 extend straight in the vehicle vertical direction, and upper and lower intermediate portions 53a and 53b are sandwiched between the upper and lower end portions 51a, 51b, 52a and 52b of the inner member 51 and outer member 52. At the same time, it has a central member 53 that is joined while the upper and lower parts 53c and 53d are sandwiched between the side sill inner panel 31 and the side sill outer panel 32.
Therefore, according to the vehicle side portion structure of the present embodiment, when the load in the vehicle width direction is input to the impact absorbing member 5 from the side sill outer panel 32 of the side sill 3, the inner member 51 and the outer member 52 with the central member 53 interposed therebetween. Can be substantially uniformly deformed toward the inside of the vehicle, and the load absorbing performance of the shock absorbing member 5 can be further enhanced.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made based on the technical idea of the present invention.

1 Floor Panel 1a Vehicle Outer End 2 Side Member 2a Lower Surface 2b Inner Wall 2c Outer Wall 2d Insertion Hole 3 Side Sill 4 Upper Cross Member on Floor 5 Impact Absorbing Member 6 Lower Cross Member Below Floor 7 Fixing Member 7a Upper 7b Lower Part 7c Intermediate part 8 Bracket member 9 Floor reinforcing member 9a Vehicle outer side end 9b Vehicle inner side end 10 Side sill side joint 12 Floor panel sloped surface 21 Reinforcement 21a Mounting surface 21b, 21c Side surface 21d Mounting hole 31 Side sill inner panel 31a Upper end portion 31b Lower end portion 31c Upper surface 32 Side sill outer panel 32a Upper end portion 32b Lower end portion 40 Flange portion of upper cross member on floor 41 Body portion of upper cross member on floor 42 Sloped portion of upper cross member on floor 42a Vehicle width direction Outer end portion 51 Inner member of shock absorbing member 51a Upper end portion 51b Lower end portion 52 Outer member of shock absorbing member 52a Upper end portion 52b Lower end portion 53 Central member 53a Upper middle portion 53b Lower middle portion 53c Upper portion 53d Lower portion 61 Lower floor bottom Main body 61c of through member 61c Through hole 62 Lower cross member flange under the floor 62a Through hole 63 Curved portion 71 Fastening bolt 85 Bracket member through hole 91 Floor member side member side joint 100 Vehicle-mounted member S1 Upper closed Cross-section W1 First joint W2 Second joint

Claims (6)

A pair of left and right side members that are provided on the lower surface of the floor panel in the vehicle width direction and extend in the vehicle front-rear direction; and a pair of left and right side sills that are provided on the vehicle width direction outer sides of the side members and extend in the vehicle front-rear direction; A cross member on the floor which is provided on the upper surface of the floor panel and extends in the vehicle width direction to connect the pair of left and right side sills;
The side sill is composed of a side sill inner panel on the vehicle inner side and a side sill outer panel on the vehicle outer side, and a shock absorbing member is provided inside the side sill,
The vehicle outer side end portion of the floor panel is a vehicle side portion structure having a side sill side joint portion joined to the side sill,
The side member and the side sill are arranged adjacent to each other in the vehicle width direction, and the side member is arranged at a position where at least a part of the side member overlaps with the side sill in a vehicle side view.
The side member has a first joint portion joined to the side sill, and the first joint portion is arranged at a position overlapping with an upper portion of the impact absorbing member inside the vehicle in a vehicle side view. And the vehicle side structure. The cross member on the floor includes an inclined portion that inclines downward toward the vehicle from the vehicle inner side to the vehicle outer side in the vehicle width direction, and the inclined portion is joined to the side sill inner panel at the vehicle width direction outer end portion. The vehicle side part structure according to claim 1, further comprising a second joint portion, wherein the second joint portion is located on an upper surface of the side sill inner panel. The side member has an inner side wall and an outer side wall, a reinforcement bonded to the inner side wall and the outer side wall is provided inside the side member, and the reinforcement is provided above the reinforcement. The upper closed cross-section portion configured by being combined with a floor panel is provided, and the upper closed cross-section portion is arranged at a position overlapping the impact absorbing member in a vehicle side view. Or the vehicle side part structure described in 2. A cross member under the floor that extends in the vehicle width direction and connects the pair of left and right side members is provided below the pair of left and right side members, and the cross member under the floor is joined to the reinforcement. The vehicle side part structure according to claim 3, wherein the vehicle side part structure is fixed to the side member by a fixing member. The floor panel has an inclined surface that inclines downward from the vehicle inner side to the vehicle outer side in the vehicle width direction, and a vehicle-mounted member is mounted below the inclined surface,
The vehicle outer end of a floor reinforcing member having a side member side joint that is joined to the side member is joined to the inclined surface of the floor panel, and the vehicle inner end of the floor reinforcing member is the inclined surface. The vehicle side portion structure according to any one of claims 1 to 4, wherein the vehicle side portion structure is joined to the floor panel at a position inside the vehicle. The shock absorbing member has an inner member and an outer member having a hat-shaped cross section whose openings are opposed to each other and whose upper and lower ends are joined at substantially the same position in the vehicle width direction. A portion is sandwiched between upper and lower end portions of the inner member and the outer member, and an upper and lower portion has a central member joined in a state of being sandwiched between the side sill inner panel and the side sill outer panel. The vehicle side part structure according to claim 1 or 3, wherein: