JP6942161B2 - Body structure - Google Patents

Description

The present invention relates to a vehicle body structure.

Conventionally, in a vehicle such as an automobile, a structure having a plate member extending in the vehicle width direction near the back surface of the bumper face is known in order to enhance the safety of the pedestrian in the event of a collision with the pedestrian. For example, Japanese Patent No. 47977726 discloses a front structure of an automobile including an overhanging portion extending outward from the left and right ends of the plate member in the vehicle width direction with respect to the shroud drawer. The overhanging portion is provided with a vertical wall having bolt holes for connecting the plate members to the front surface of the shroud side. On the inner side of the vertical wall in the vehicle width direction, a peripheral wall having a bolt hole for connecting the plate member to the shroud drawer is provided on the rear surface portion of the plate member.

Japanese Patent No. 47977726

However, when the plate member is connected to the shroud side by the bolt hole of the vertical wall and is connected to the shroud drawer by the bolt hole of the peripheral wall, the degree of freedom in design is reduced due to the increase in the connection points of the plate member and the enlargement of the connecting portion. there's a possibility that.

Therefore, an object of the present invention is to provide a vehicle body structure capable of improving the degree of freedom in design.

(1) The vehicle body structure according to one aspect of the present invention (for example, the vehicle body front structure 1 in the embodiment) is arranged at the front portion of the vehicle or the rear portion of the vehicle, and a pair of left and right side members extending in the vertical direction of the vehicle (for example, the embodiment). The front side members 10L, 10R in the embodiment and the lower cross member (for example, the front in the embodiment) that extends in the vehicle width direction so as to straddle the pair of left and right side members and overlaps the lower end of the side members in the vehicle front-rear direction. In the lower member 12) and the overlapping portion (for example, the overlapping portion 30 in the embodiment) which is arranged outside the lower cross member in the vehicle front-rear direction and overlaps with the side member and the lower cross member, the side member and A plate member (for example, the plate member 4 in the embodiment) connected to the lower cross member in the front-rear direction of the vehicle is provided.

(2) In one aspect of the present invention, the plate member rotates upward with respect to the connection position (for example, the connection position P1 in the embodiment) in the polymerization portion as a base point (for example, upward rotation in the embodiment). A protrusion (for example, a protrusion 44 in the embodiment) that protrudes from the upper surface of the plate member may be provided so as to overlap the lower cross member on the locus R1).

(3) In one aspect of the present invention, a duct support member (for example, the duct support member 6 in the embodiment) provided above the protruding portion and capable of supporting the air duct (for example, the air duct 5 in the embodiment) is further provided. You may.

(4) In one aspect of the present invention, a rotation locus (for example, a downward rotation locus in the embodiment) when the plate member is provided on the lower surface of the lower cross member and rotates downward with the connection position in the polymerization portion as a base point. A contact cushioning member (for example, the contact cushioning member 7 in the embodiment) that overlaps the plate member on R2) may be further provided.

(5) In one aspect of the present invention, an air duct provided on the upper surface of the plate member is further provided, and the plate member has a duct installation portion (for example, a duct installation portion 43 in the embodiment) in which the air duct can be installed. The duct installation portion is arranged at a position inside the plate member in the vehicle width direction with respect to the vehicle width direction outer end and at a position where the height in the vehicle vertical direction is smaller than the vehicle width direction outer end of the plate member. You may be.

(6) In one aspect of the present invention, the lower cross member includes an inclined lower surface portion (for example, an inclined lower surface portion 12d in the embodiment) that is inclined with respect to the vehicle front-rear direction, and the inclined lower surface portion is the lower cross. The lower cross member is provided at a position inside the outer end in the vehicle width direction of the member in the vehicle width direction at a position smaller than the outer end in the vehicle width direction of the lower cross member, and the plate member is provided on the inclined lower surface. An inclined upper surface portion (for example, an inclined upper surface portion 42 in the embodiment) which is inclined along the portion and connected to the inclined lower surface portion may be provided.

(7) In one aspect of the present invention, the plate member is a portion inside the vehicle width direction from the polymerized portion and has a height different from the connecting position in the polymerized portion in the vehicle vertical direction (for example, implementation). It may be connected to the lower cross member at the second connection position P2) in the embodiment.

(8) In one aspect of the present invention, the polymerization portion coaxially penetrates the side member, the lower cross member, and the plate member in the front-rear direction of the vehicle, and a bolt (for example, the bolt 32 in the embodiment) can be inserted. It may have a through hole (for example, a through hole 31 in the embodiment).

(9) In one aspect of the present invention, the lower cross member is a front lower member located at the lower part of a front bulkhead (for example, the front bulkhead 3 in the embodiment) arranged at the front of the vehicle, and the plate. The member may be arranged in front of the front lower member.

According to the aspect (1) above, the plate member is provided outside the lower cross member in the vehicle front-rear direction and is connected in the vehicle front-rear direction at the overlapping portion overlapping the side member and the lower cross member. It has the following effects.
At the time of a vehicle collision, the load input to the overlapping portion through the plate member can be distributed to the side member and the lower cross member. Therefore, it becomes easy to reduce the number of connecting points. In addition, the connecting portion can be miniaturized as compared with the case where the plate member is provided with an overhanging portion for connecting the plate member. Therefore, the degree of freedom in design can be improved.

According to the aspect (2) above, the plate member includes a protruding portion protruding from the upper surface of the plate member so as to overlap the lower cross member on the rotation locus when rotating upward from the connecting position in the overlapping portion. This has the following effects.
When the plate member rotates upward with respect to the connecting position in the overlapping portion at the time of a vehicle collision, the protruding portion interferes with the lower cross member, so that the upward rotation of the plate member can be restricted.

According to the aspect (3) above, the following effects can be obtained by providing a duct support member provided above the protruding portion and capable of supporting the air duct.
When the plate member rotates upward with respect to the connecting position in the overlapping portion at the time of a vehicle collision, the protruding portion interferes with the duct support member, so that the upward rotation of the plate member can be restricted.

According to the aspect (4) above, the contact cushioning member provided on the lower surface of the lower cross member and overlaps with the plate member on the rotation locus when the plate member rotates downward from the connecting position in the polymerization portion is provided. Then, the following effects are achieved.
When the plate member rotates downward with respect to the connecting position in the overlapping portion at the time of a vehicle collision, the plate member interferes with the contact cushioning member, so that the downward rotation of the plate member can be restricted.

According to the aspect (5) above, the plate member is provided with an air duct provided on the upper surface of the plate member, the plate member is provided with a duct installation portion on which an air duct can be installed, and the duct installation portion is an outer end in the vehicle width direction of the plate member. The following effects are obtained by arranging the plate member in the inner portion in the vehicle width direction at a position where the height in the vehicle vertical direction is smaller than the outer end portion in the vehicle width direction of the plate member.
Compared to the case where the duct installation part has a height higher than the outer end of the plate member in the vehicle width direction, it is easier to secure a wide air inlet when the air duct is installed in the duct installation part, so the cooling performance is improved. do.

According to the aspect (6) above, the lower cross member includes an inclined lower surface portion that is inclined with respect to the vehicle front-rear direction, and the inclined lower surface portion is inside the vehicle width direction from the outer end in the vehicle width direction of the lower cross member. The lower cross member is provided at a position where the height in the vehicle vertical direction is smaller than the outer end portion in the vehicle width direction, and the plate member is inclined along the inclined lower surface portion and is connected to the inclined lower surface portion. By providing the part, the following effects are obtained.
By connecting the inclined upper surface portion of the plate member to the inclined lower surface portion of the lower cross member, it is possible to stably fix even a portion having a small height in the lower cross member. In addition, since a space can be secured above the lower cross member, the degree of freedom in design is improved.

According to the aspect (7) above, the plate member is connected to the lower cross member at a position inside the overlapping portion in the vehicle width direction and having a height different from the connecting position in the overlapping portion in the vehicle vertical direction. By doing so, the following effects are achieved.
Compared to the case where the plate member is connected to the lower cross member at the same height position as the connection position in the polymerization part, the plate member rotates upward and downward with the connection position in the polymerization part as a base point at the time of a vehicle collision. It can be suppressed.

According to the aspect (8) above, the polymerization portion has the following effects by having a through hole through which the side member, the lower cross member and the plate member are coaxially penetrated in the front-rear direction of the vehicle and through which a bolt can be inserted. ..
Since the side member, the lower cross member and the plate member can be connected by bolts through the through holes of the polymerization portion, the connection structure is simplified. In addition, when the polymerized portion has a single through hole, the connecting portion can be easily miniaturized as compared with the case where the polymerized portion has a plurality of through holes. Therefore, the degree of freedom in design can be further improved.

According to the aspect (9) above, the lower cross member is a front lower member located at the lower part of the front bulkhead arranged at the front part of the vehicle, and the plate member is arranged in front of the front lower member. This has the following effects.
At the time of a vehicle front collision, the load input to the overlapping portion through the plate member can be distributed to the side member and the front lower member. Therefore, it becomes easy to reduce the number of connecting points. In addition, the connecting portion can be miniaturized as compared with the case where the plate member is provided with an overhanging portion for connecting the plate member. Therefore, the degree of freedom in design can be improved.

The perspective view of the vehicle body front structure which concerns on embodiment. FIG. 3 is a cross-sectional view around a plate member including the front exterior of the vehicle body according to the embodiment. FIG. 1 is a perspective view showing a state in which a plate member, an air duct, and the like are removed. The perspective view of the connection part of the right front side member and the front lower member which concerns on embodiment. Bottom view of the vehicle body front structure according to the embodiment. FIG. 5 is a sectional view taken along line VI-VI of FIG. FIG. 5 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 6 is an enlarged view of a main part of FIG. 6, which is a cross-sectional view of the periphery of a connecting portion of the plate member according to the embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the embodiment, the front portion (vehicle body front structure) of the electric vehicle (vehicle) such as an electric vehicle, a hybrid vehicle, and a fuel cell vehicle will be described. Unless otherwise specified, the directions such as front, rear, left, and right in the following description shall be the same as the directions in the vehicle described below. At appropriate points in the figure used in the following description, an arrow FR indicating the front of the vehicle, an arrow LH indicating the left side of the vehicle, an arrow UP indicating the upper part of the vehicle, and a line CL indicating the center of the left and right sides of the vehicle body are shown.

<Car body front structure 1>
FIG. 1 is a perspective view of a vehicle body front structure 1 according to an embodiment.
As shown in FIG. 1, the vehicle body front structure 1 is connected to a pair of left and right front side frames 2L and 2R arranged at the front of the vehicle and extending in the front-rear direction of the vehicle and a pair of left and right front side frames 2L and 2R. The front bulkhead 3, the plate member 4 arranged in front of the lower part of the front bulkhead 3, the air duct 5 having an air inlet, the duct support member 6 for supporting the air duct 5, and the contact cushioning member 7 ( (See FIG. 2).

FIG. 2 is a cross-sectional view of the periphery of the plate member 4 including the vehicle body front exterior 8 according to the embodiment. FIG. 2 shows the periphery of the lower part of the vehicle body front exterior 8.
As shown in FIG. 2, the vehicle body front structure 1 is covered from the front of the vehicle by the vehicle body front exterior 8. The vehicle body front exterior 8 is formed so as to follow the outer shape of the plate member 4 and the air duct 5. The vehicle body front exterior 8 is a front convex portion having a curved shape that is convex forward so as to sandwich the lower side guides 20L and 20R of the air duct 5 (the right side guide 20R is shown in FIG. 2) and the plate member 4 in the vertical direction. Has 9.

<Front bulkhead 3>
FIG. 3 is a perspective view showing a state in which the plate member 4, the air duct 5, and the like are removed in FIG.
As shown in FIG. 3, the front bulkhead 3 has a substantially rectangular frame shape having a length in the vehicle width direction. For example, a cooling component (not shown) such as a radiator is arranged in the frame portion of the front bulkhead 3.

The front bulkhead 3 is arranged between a pair of left and right front side members 10L and 10R (side members) arranged at the front of the vehicle and extending in the vertical direction of the vehicle and a pair of left and right front side members 10L and 10R and arranged in the vehicle width direction. It includes a front upper member 11 that extends, and a front lower member 12 (lower cross member) that is arranged below the front upper member 11 and extends in the vehicle width direction.

The front side members 10L and 10R have an open cross-sectional shape (hat cross-sectional shape) that opens outward in the vehicle width direction. The front side members 10L and 10R extend in the vertical direction of the vehicle and have a side inner side surface portion 10a having an inner side surface in the vehicle width direction of the front side members 10L and 10R, and a side extending outward in the vehicle width direction from the front edge of the side inner side surface portion 10a. A front surface portion 10b and a side rear surface portion 10c extending outward in the vehicle width direction from the trailing edge of the side inner side surface portion 10a are provided. The side inner side surface portion 10a, the side front surface portion 10b, and the side rear surface portion 10c are integrally formed of the same member.

The front lower member 12 extends in the vehicle width direction so as to straddle the pair of left and right front side members 10L and 10R. The outer end portion of the front lower member 12 in the vehicle width direction is arranged at a position where it overlaps with the lower end portions of the front side members 10L and 10R in the vehicle front-rear direction.

The front lower member 12 has an open cross-sectional shape (hat cross-sectional shape) that opens upward. The front lower member 12 has a lower lower surface portion 12a extending in the vehicle width direction and having a lower surface of the front lower member 12, a lower front surface portion 12b extending upward from the front edge of the lower lower surface portion 12a, and a trailing edge of the lower lower surface portion 12a. A lower rear surface portion 12c extending upward from the lower surface is provided. The lower lower surface portion 12a, the lower front surface portion 12b, and the lower rear surface portion 12c are integrally formed of the same member.

As shown in FIG. 4, the outer end portion of the lower lower surface portion 12a in the vehicle width direction is connected to the lower end portion of the side inner side surface portion 10a via an L-shaped L-shaped bracket 15.
The outer end portion of the lower front portion 12b in the vehicle width direction overlaps the lower end portion of the side front portion 10b from the front.
The outer portion of the lower rear surface portion 12c in the vehicle width direction overlaps the lower end portion of the side rear surface portion 10c (see FIG. 3) from the rear.
In the figure, reference numeral 16 indicates a mount bracket for supporting a cooling component (not shown) such as a radiator.

The height of the front lower member 12 in the vertical direction of the vehicle decreases toward the center in the vehicle width direction. As shown in FIG. 7, the front lower member 12 includes an inclined lower surface portion 12d that is inclined with respect to the vehicle front-rear direction. In cross-sectional view, the inclined lower surface portion 12d is inclined so as to be located upward toward the front side of the vehicle. The inclined lower surface portion 12d is provided at a position inside the front lower member 12 in the vehicle width direction with respect to the vehicle width direction outer end at a position where the height in the vehicle vertical direction is smaller than the vehicle width direction outer end of the front lower member 12. ing.

<Air duct 5>
As shown in FIG. 1, the air duct 5 is attached to the front bulkhead 3 and the plate member 4 or the like with a clip 35 or the like. The air duct 5 is arranged between the pair of left and right side guides 20L and 20R extending in the vertical direction of the vehicle, the pair of left and right side guides 20L and 20R, the upper guide 21 extending in the vehicle width direction, and the upper guide 21 below the upper guide 21. A lower guide 22 extending in the vehicle width direction is provided.

The upper guide 21 is formed along the front bumper.
The side guides 20L and 20R are arranged in front of the front side members 10L and 10R. The side guides 20L and 20R extend from the front surface of the front side members 10L and 10R toward the rear surface of the vehicle body front exterior 8 (see FIG. 2).
The lower guide 22 is arranged above the front lower member 12 (see FIG. 3). The lower guide 22 extends in the front-rear direction of the vehicle so as to straddle the front lower member 12 and the plate member 4.

<Plate member 4>
As shown in FIG. 2, the plate member 4 is arranged in front of the front lower member 12. The plate member 4 extends in the vehicle width direction so as to straddle the front lower member 12 (see FIG. 5). As shown in FIG. 5, the leading edge 4a of the plate member 4 is curved so as to be convex in the front of the vehicle when viewed from the bottom. When viewed from the bottom, the trailing edge 4b of the plate member 4 extends substantially linearly in the vehicle width direction. A plurality of ribs 4r are provided in a grid pattern on the lower surface of the plate member 4. In the cross-sectional view of FIG. 2, the upper edge 4c of the plate member 4 has a substantially horizontal shape. In cross-sectional view, the lower edge 4d of the plate member 4 is inclined so as to be located upward toward the front side of the vehicle.

As shown in FIG. 8, the plate member 4 is connected in the vehicle front-rear direction to the overlapping portion 30 in which the front side members 10L and 10R (the right front side member 10R is shown in FIG. 8) and the front lower member 12 overlap in the vehicle front-rear direction. Has been done. The overlapping portion 30 includes a lower end portion of the side front portion 10b of the front side members 10L and 10R, an outer end portion of the lower front portion 12b of the front lower member 12 in the vehicle width direction, and an outer end portion of the rear surface portion 4k of the plate member 4 in the vehicle width direction. This is the part where the parts overlap in the front-rear direction of the vehicle. The overlapping portion 30 overlaps the plate member 4, the front lower member 12, and the front side members 10L and 10R in this order from the front of the vehicle.

The overlapping portion 30 is coaxial with the lower end portion of the side front portion 10b of the front side members 10L and 10R, the outer end portion of the lower front portion 12b of the front lower member 12 in the vehicle width direction, and the rear surface portion 4k of the plate member 4 in the vehicle front-rear direction. It has a through hole 31 penetrating through. The through hole 31 is a through hole 31 through which the bolt 32 can be inserted. In this embodiment, the polymerization section 30 has a single through hole 31. The bolt 32 is inserted from the front of the vehicle.

The plate member 4 has an annular boss portion 41 that projects rearward in the polymerization portion 30. The front side members 10L and 10R have nuts 33 to which bolts 32 can be screwed in the overlapping portion 30. For example, after the plate member 4, the front lower member 12, and the front side members 10L and 10R are stacked in this order from the front of the vehicle to form the overlapping portion 30, bolts 32 are inserted into the through holes 31 from the front of the vehicle in each of the left and right overlapping portions 30. Insert and screw into the nut 33. As a result, the plate member 4 can be fastened and fixed to the front side members 10L and 10R and the front lower member 12.

As shown in FIG. 7, the plate member 4 includes an inclined upper surface portion 42 that is inclined along the inclined lower surface portion 12d of the front lower member 12. The inclined upper surface portion 42 is connected to the inclined lower surface portion 12d by a clip 35. The inclined upper surface portion 42 and the inclined lower surface portion 12d are provided with a plurality of insertion holes (not shown) through which the clip 35 can be inserted. The plurality of insertion holes are arranged at intervals in the vehicle width direction. The clip 35 is inserted into each insertion hole from the lower front of the vehicle.

The connection position P2 by the clip 35 is lower than the connection position P1 in the polymerization section 30. Here, the connection position P1 (first connection position, see FIG. 6) in the overlapping portion 30 is a position that passes through the axis of the bolt 32 and intersects the front surface of the front lower member 12 (through hole 31 on the front surface of the front lower member 12). Center) means. The connection position P2 (second connection position, see FIG. 7) by the clip 35 is a position that passes through the axis of the clip 35 and intersects the lower surface of the inclined lower surface portion 12d of the front lower member 12 (insertion hole of the lower surface of the inclined lower surface portion 12d). Center) means.

The plate member 4 is attached to the front lower member 12 at a second connecting position P2 which is an inner portion in the vehicle width direction of the overlapping portion 30 and whose height in the vertical direction of the vehicle is different from that of the first connecting position P1 in the overlapping portion 30. It is connected. The second connection position P2 is lower than the first connection position P1.

The plate member 4 includes a duct installation portion 43 on which the air duct 5 can be placed. The duct installation portion 43 is a portion that supports the lower guide 22 in the air duct 5. The duct installation portion 43 is arranged at a position inside the plate member 4 in the vehicle width direction with respect to the vehicle width direction outer end at a position where the height in the vehicle vertical direction is smaller than the vehicle width direction outer end of the plate member 4. ..

As shown in FIG. 8, the plate member 4 protrudes from the upper surface of the plate member 4 so as to overlap the front lower member 12 on the rotation locus R1 when rotating upward with the first connecting position P1 in the polymerization portion 30 as a base point. The protrusion 44 is provided. The protrusion 44 is a rib integrally formed of the same member as the plate member 4. The protruding portion 44 is arranged so as to overlap the flange portion 12e of the lower front portion 12b of the front lower member 12 on the upward rotation locus R1.

<Duct support member 6>
As shown in FIG. 8, the duct support member 6 is provided above the protrusion 44 of the plate member 4. The duct support member 6 supports the side guides 20L and 20R in the air duct 5 (the right side guide 20R is shown in FIG. 8). In cross-sectional view, the duct support member 6 has an L shape. The duct support member 6 includes a first surface portion 6a extending in the vertical direction of the vehicle along the front surface portions 10b of the front side members 10L and 10R, and a second surface portion 6b extending forward from the lower end of the first surface portion 6a. The first surface portion 6a and the second surface portion 6b are integrally formed of the same member. For example, the first surface portion 6a is welded to the front surface portions 10b of the front side members 10L and 10R.

The second surface portion 6b extends in the vehicle width direction along the flange portion 12e of the front surface portion 12b of the front lower member 12. The second surface portion 6b extends forward from the front end of the flange portion 12e of the front surface portion 12b of the front lower member 12. The second surface portion 6b is arranged so as to overlap the protruding portion 44 of the plate member 4 on the upward rotation locus R1 of the plate member 4.

<Contact buffer member 7>
As shown in FIG. 4, the contact cushioning member 7 is provided on the lower surface of the front lower member 12. The contact buffer member 7 is a bracket that overlaps with the plate member 4 on the rotation locus R2 (see FIG. 8) when the plate member 4 rotates downward with the connection position P1 in the polymerization portion 30 as a base point.

The contact cushioning member 7 includes a bracket main body 7a connected to the lower surface of the front lower member 12, and an upward extending portion 7b extending upward from the front end portion of the bracket main body 7a. The upper end of the upward extending portion 7b is arranged between the rear surface portion 4k of the plate member 4 and the front surface portion 12b of the front lower member 12. The upward extending portion 7b is arranged so as to overlap the plate member 4 on the downward rotation locus R2 of the plate member 4.

As described above, the vehicle body front structure 1 of the above embodiment is arranged in the front portion of the vehicle, and is composed of a pair of left and right front side members 10L and 10R extending in the vertical direction of the vehicle and a pair of left and right front side members 10L and 10R. The front lower member 12 that extends in the vehicle width direction so as to straddle and overlaps the lower end of the front side members 10L, 10R in the vehicle front-rear direction, and is arranged in front of the front lower member 12, and the front side members 10L, 10R and A plate member 4 connected in the vehicle front-rear direction at the overlapping portion 30 overlapping the front lower member 12 is provided.
According to this configuration, the load input to the overlapping section 30 through the plate member 4 can be distributed to the front side members 10L and 10R and the front lower member 12 at the time of a vehicle front collision. Therefore, it becomes easy to reduce the number of connecting points. In addition, the connecting portion can be miniaturized as compared with the case where the plate member 4 is provided with an overhanging portion for connecting the plate member 4. Therefore, the degree of freedom in design can be improved.

In the above embodiment, the plate member 4 protrudes from the upper surface of the plate member 4 so as to overlap the front lower member 12 on the rotation locus R1 when the plate member 4 rotates upward with the connection position P1 in the polymerization portion 30 as a base point. By providing, the following effects are obtained.
When the plate member 4 rotates upward with respect to the connecting position P1 in the overlapping portion 30 at the time of a vehicle front collision, the protruding portion 44 interferes with the front lower member 12, so that the upward rotation of the plate member 4 can be restricted. can.

In the above embodiment, the following effects are obtained by providing the duct support member 6 provided above the protrusion 44 and capable of supporting the air duct 5.
When the plate member 4 rotates upward with respect to the connecting position P1 in the overlapping portion 30 at the time of a vehicle front collision, the protruding portion 44 interferes with the duct support member 6, so that the upward rotation of the plate member 4 can be restricted. can.

In the above embodiment, the contact buffer member 7 provided on the lower surface of the front lower member 12 and overlapping the plate member 4 on the rotation locus R2 when the plate member 4 rotates downward with the connection position P1 in the overlapping portion 30 as a base point is provided. By preparing, the following effects are achieved.
When the plate member 4 rotates downward with respect to the connection position P1 in the overlapping portion 30 at the time of a vehicle front collision, the plate member 4 interferes with the contact cushioning member 7, so that the downward rotation of the plate member 4 can be restricted. can.

In the above embodiment, the air duct 5 provided on the upper surface of the plate member 4 is provided, the plate member 4 includes a duct installation portion 43 on which the air duct 5 can be installed, and the duct installation portion 43 is in the vehicle width direction of the plate member 4. The following effects are obtained by arranging the plate member 4 at a position inside the outer end in the vehicle width direction at a position where the height in the vehicle vertical direction is smaller than the outer end in the vehicle width direction of the plate member 4.
Compared with the case where the duct installation portion 43 has a height equal to or higher than the outer end portion in the vehicle width direction of the plate member 4, it is easier to secure a wider air introduction port when the air duct 5 is installed in the duct installation portion 43. Cooling performance is improved.

In the above embodiment, the front lower member 12 includes an inclined lower surface portion 12d that is inclined with respect to the vehicle front-rear direction, and the inclined lower surface portion 12d is a portion inside the front lower member 12 in the vehicle width direction with respect to the outer end in the vehicle width direction. The front lower member 12 is provided at a position where the height in the vehicle vertical direction is smaller than the outer end portion in the vehicle width direction, and the plate member 4 is inclined along the inclined lower surface portion 12d and is connected to the inclined lower surface portion 12d. By providing the inclined upper surface portion 42, the following effects can be obtained.
By connecting the inclined upper surface portion 42 of the plate member 4 to the inclined lower surface portion 12d of the front lower member 12, even a portion of the front lower member 12 having a small height can be stably fixed. In addition, since a space can be secured above the front lower member 12, the degree of freedom in design is improved.

In the above embodiment, the plate member 4 is connected to the front lower member 12 at a position inside the overlapping portion 30 in the vehicle width direction and having a height different from the connecting position P1 in the overlapping portion 30 in the vehicle vertical direction. By doing so, the following effects are achieved.
Compared with the case where the plate member 4 is connected to the front lower member 12 at the same height position as the connecting position P1 in the overlapping portion 30, the plate member 4 is upward with the connecting position P1 in the overlapping portion 30 as a base point at the time of a vehicle collision. And it can suppress the downward rotation.

In the above embodiment, the polymerization unit 30 has a through hole 31 through which the front side member 10L (10R), the front lower member 12 and the plate member 4 are coaxially penetrated in the front-rear direction of the vehicle and the bolt 32 can be inserted. It has the following effects.
Since the front side member 10L (10R), the front lower member 12 and the plate member 4 can be connected by the bolt 32 through the through hole 31 of the polymerization portion 30, the connection structure is simplified. In addition, in the present embodiment, since the polymerization section 30 has a single through hole 31, the connecting portion can be easily miniaturized as compared with the case where the polymerization section 30 has a plurality of through holes 31. Therefore, the degree of freedom in design can be further improved.

<Modification example>
In the above embodiment, the vehicle body structure has been described with reference to an example in which the vehicle body front structure 1 is arranged in the vehicle front portion, but the present invention is not limited to this. For example, the vehicle body structure may be a vehicle body rear structure arranged at the rear of the vehicle.

In the above embodiment, the lower cross member is the front lower member 12 located at the lower part of the front bulkhead 3 arranged at the front of the vehicle, and the plate member 4 is arranged in front of the front lower member 12. However, it is not limited to this. For example, the lower cross member is a rear lower member located at the lower part in the vehicle body rear structure arranged at the rear of the vehicle, and the plate member 4 may be arranged at the rear of the rear lower member. That is, the plate member 4 may be arranged outside the lower cross member in the front-rear direction of the vehicle.

In the above embodiment, the plate member 4 protrudes from the upper surface of the plate member 4 so as to overlap the front lower member 12 on the rotation locus R1 when the plate member 4 rotates upward with the connection position P1 in the polymerization portion 30 as a base point. Although the explanation has been given with an example of providing, the present invention is not limited to this. For example, the plate member 4 does not have to have the protrusion 44. For example, the protrusion 44 does not have to be a rib integrally formed with the same member as the plate member 4. For example, the protruding portion 44 may be formed of a member different from the plate member 4.

In the above embodiment, an example in which a duct support member 6 provided above the protrusion 44 and capable of supporting the air duct 5 is provided has been described, but the present invention is not limited to this. For example, the duct support portion may be provided at a position that does not overlap with the protruding portion 44 in the vertical direction of the vehicle. For example, the vehicle body front structure 1 does not have to have a duct support portion.

In the above embodiment, the contact buffer member 7 provided on the lower surface of the front lower member 12 and overlapping the plate member 4 on the rotation locus R2 when the plate member 4 rotates downward with the connection position P1 in the overlapping portion 30 as a base point is provided. The explanation has been given with an example of provision, but the present invention is not limited to this. For example, the contact cushioning member 7 may be a bracket provided on a frame other than the front lower member 12. For example, the vehicle body front structure 1 does not have to have the contact cushioning member 7.

In the above embodiment, the air duct 5 provided on the upper surface of the plate member 4 is provided, and the plate member 4 includes a duct installation portion 43 on which the air duct 5 can be installed. For example, the duct installation portion 43 may be provided on a frame other than the plate member 4. For example, the plate member 4 does not have to have the duct installation portion 43.

In the above embodiment, the front lower member 12 includes an inclined lower surface portion 12d that is inclined with respect to the vehicle front-rear direction, and the inclined lower surface portion 12d is a portion inside the front lower member 12 in the vehicle width direction with respect to the outer end in the vehicle width direction. The front lower member 12 is provided at a position where the height in the vehicle vertical direction is smaller than the outer end portion in the vehicle width direction, and the plate member 4 is inclined along the inclined lower surface portion 12d and is connected to the inclined lower surface portion 12d. Although the description has been given with an example of providing the inclined upper surface portion 42, the present invention is not limited to this. For example, the front lower member 12 may include a vertical front surface portion orthogonal to the vehicle front-rear direction. For example, the plate member 4 may include a surface portion immediately after the lead that is connected to the surface portion immediately before the lead along the surface portion immediately before the lead. For example, the front lower member 12 does not have to have the inclined lower surface portion 12d. For example, the plate member 4 does not have to have the inclined upper surface portion 42.

In the above embodiment, the plate member 4 is connected to the front lower member 12 at a position inside the overlapping portion 30 in the vehicle width direction and having a height different from the connecting position P1 in the overlapping portion 30 in the vehicle vertical direction. This has been explained with an example, but it is not limited to this. For example, the plate member 4 may be connected to the front lower member 12 at the same height as the connection position P1 in the polymerization section 30.

In the above embodiment, the polymerization unit 30 has a single through hole 31 through which the front side members 10L and 10R, the front lower member 12 and the plate member 4 are coaxially penetrated in the vehicle front-rear direction and the bolt 32 can be inserted. However, it is not limited to this. For example, the polymerization section 30 may have a plurality of through holes 31. For example, the plate member 4 may be fastened together with the front side members 10L and 10R and the front lower member 12 with a plurality of bolts 32 in each of the left and right overlapping portions 30.

Although the preferred embodiments of the present invention have been described above, the present invention is not limited thereto, and configurations can be added, omitted, replaced, and other changes can be made without departing from the spirit of the present invention. Yes, it is also possible to appropriately combine the above-mentioned modification examples.

1 ... Body front structure (body structure)
3 ... Front bulkhead 4 ... Plate member 5 ... Air duct 6 ... Duct support member 7 ... Contact cushioning member 10L, 10R ... Front side member (side member)
12 ... Front lower member (lower cross member)
12d ... Inclined lower surface 30 ... Overlapping part 31 ... Through hole 32 ... Bolt 42 ... Inclined upper surface 43 ... Duct installation part 44 ... Protruding part P1 ... Connecting position P2 ... Second connecting position (The connecting position in the overlapping part is the vehicle up and down Positions with different heights in the direction)
R1 ... Upward rotation locus (rotational locus when the plate member rotates upward with the connection position as the base point)
R2 ... Downward rotation locus (rotational locus when the plate member rotates downward with the connection position as the base point)

Claims (9)

A pair of left and right side members that are located at the front or rear of the vehicle and extend in the vertical direction of the vehicle,
A lower cross member that extends in the vehicle width direction so as to straddle the pair of left and right side members and overlaps the lower end of the side member in the vehicle front-rear direction.
A plate member that is arranged outside the lower cross member in the vehicle front-rear direction and is connected to the side member and the lower cross member in the vehicle front-rear direction at a polymerization portion that overlaps the side member and the lower cross member. The body structure is characterized by being equipped with. The claim is characterized in that the plate member includes a protruding portion protruding from the upper surface of the plate member so as to overlap the lower cross member on a rotation locus when rotating upward with the connection position in the polymerization portion as a base point. Item 1. The vehicle body structure according to item 1. The vehicle body structure according to claim 2, further comprising a duct support member provided above the protrusion and capable of supporting an air duct. A claim that is provided on the lower surface of the lower cross member and further includes a contact cushioning member that overlaps with the plate member on a rotation locus when the plate member rotates downward with the connection position in the polymerization portion as a base point. The vehicle body structure according to any one of items 1 to 3. Further provided with an air duct provided on the upper surface of the plate member,
The plate member includes a duct installation portion on which the air duct can be installed.
The duct installation portion is arranged at a position inside the plate member in the vehicle width direction with respect to the vehicle width direction outer end at a position where the height in the vehicle vertical direction is smaller than the vehicle width direction outer end portion of the plate member. The vehicle body structure according to any one of claims 1 to 4, wherein the vehicle body structure is characterized by the above. The lower cross member includes an inclined lower surface portion that is inclined with respect to the front-rear direction of the vehicle.
The inclined lower surface portion is provided at a position inside the lower cross member in the vehicle width direction with respect to the outer end in the vehicle width direction at a position where the height in the vehicle vertical direction is smaller than the outer end in the vehicle width direction of the lower cross member. ,
The vehicle body structure according to any one of claims 1 to 5, wherein the plate member is inclined along the inclined lower surface portion and includes an inclined upper surface portion connected to the inclined lower surface portion. The plate member is characterized in that it is connected to the lower cross member at a position inside the vehicle width direction from the polymerized portion and at a position different in height in the vehicle vertical direction from the connecting position in the polymerized portion. The vehicle body structure according to any one of claims 1 to 6. Any one of claims 1 to 7, wherein the polymerization portion coaxially penetrates the side member, the lower cross member, and the plate member in the front-rear direction of the vehicle, and has a through hole through which a bolt can be inserted. Body structure described in the section. The lower cross member is a front lower member located at the lower part of the front bulkhead arranged at the front of the vehicle.
The vehicle body structure according to any one of claims 1 to 8, wherein the plate member is arranged in front of the front lower member.

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