JP7137906B2 - vehicle structure - Google Patents

Description

The present invention relates to vehicle structures such as automobiles.

As a specific example of the vehicle structure, there is one described in Patent Document 1, and a simplified main part structure thereof is shown in FIG.
In the vehicle structure shown in the figure, a floor tunnel portion 20 extending in the longitudinal direction of the vehicle is provided at a substantially central portion in the vehicle width direction of a floor portion 2 (front floor portion) of the vehicle. A pair of left and right floor cloth portions 3 extending in the vehicle width direction are joined to the side wall portions 20a. Further, inside the floor tunnel portion 20, a bridge-like reinforcing member 5e is provided that is joined to the inner surface portion of the floor tunnel portion 20 and indirectly bridges and connects the pair of floor cross portions 3 to each other.
According to such a configuration, it is possible to effectively increase the strength of the vehicle by utilizing the pair of floor cross portions 3 and the reinforcement member 5e. It is useful for suppressing so-called cross-sectional collapse at the time of cutting.

However, the prior art still has room for improvement as described below.

That is, a bracket 8a for mounting the vehicle seat 7 may be provided on the pair of floor cloth portions 3. As shown in FIG. In this case, when a frontal collision of the vehicle occurs, a force is generated to tilt the vehicle seat 7 toward the front of the vehicle, and this force tends to rotate the bracket 8a and the floor cloth portion 3 downward toward the front of the vehicle. A rotating force F2 is generated. Therefore, if the strength of the floor tunnel portion 20 and the reinforcing member 5e is low, there is a possibility that the sections of these portions will collapse due to the rotational force F2.
As means for solving this problem, means for increasing the thickness of the floor tunnel portion 20 and the reinforcing member 5e can be considered. However, adopting such a means would result in an increase in the weight of the vehicle and an increase in the manufacturing cost.

Japanese Patent Application Laid-Open No. 2017-81200

The present invention has been devised under the circumstances described above, and while suppressing the increase in the thickness of each part and the increase in manufacturing cost, the floor tunnel section collapses in the event of a frontal collision of the vehicle. An object of the present invention is to provide a vehicle structure that can appropriately eliminate the fear.

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

The vehicle structure provided by the present invention includes left and right side wall portions extending in the longitudinal direction of the vehicle, positioned substantially centrally in the vehicle width direction of the floor portion of the vehicle, and standing upward from general portions of the floor portion, and the side walls. a floor tunnel portion having an upper wall portion positioned between the upper portions of the vehicle seat; A vehicle structure comprising: a pair of left and right floor cross portions to which side portions are attached; and a reinforcing member that is joined to the floor tunnel portion and bridges and connects one ends of the pair of floor cross portions, wherein the reinforcement The member is a hat-shaped member in a front view that is arranged inside a region of the floor tunnel portion located between the pair of floor cross portions, and is located on the lower surface side of the upper wall portion of the floor tunnel portion. and an upper plate portion and a pair of standing plate portions superimposed and joined to the inner surfaces of the side wall portions, and protruding from the lower end portions of the pair of standing plate portions in a manner bent outward in the vehicle width direction, and a pair of base portions overlapped and joined to the lower surface side of the vicinity of the side wall portions of the floor tunnel portion among the general portions of the floor portion, and projecting forward of the vehicle from the pair of base portions . and an upper front projecting portion provided on the upper plate portion so as to be overlapped and joined to the inner surface side of the boundary portion between the side wall portions of the floor tunnel portion and the upper wall portion . , the upper plate portion, the pair of upright plate portions, and the pair of base portions are formed with recessed portions extending in the vehicle width direction in a plan view, and the floor portion including the floor tunnel portion and the reinforcing member provide , a closed cross-sectional structure having the concave portion as an internal space is formed .

According to such a configuration, the following effects are obtained.
That is, when a vehicle frontal collision occurs, a force is generated to rotate the vehicle seat in a forward-tilted state, and a rotational force is generated in the floor cloth portion in the same direction as the rotation. This rotational force can be received by the upper front protrusion of the reinforcing member and the portion overlapping the boundaries between the side walls and the upper wall of the floor tunnel section. Here, since the upper front protruding portion of the reinforcing member protrudes further toward the front side of the vehicle than the lower region of the reinforcing member, the above-described rotational force can be effectively received. As a result, even though the thickness of the reinforcing member and the floor tunnel portion is suppressed, and the weight of the vehicle and the manufacturing cost are reduced, there is a risk that the floor tunnel portion will collapse in the event of a frontal collision of the vehicle. can be eliminated or reduced.

Other features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.

1 is a schematic side view showing an example of a vehicle structure according to the present invention; FIG. FIG. 2 is a schematic plan view of a main portion of the vehicle structure shown in FIG. 1; FIG. 3 is a schematic see-through perspective view of a main part of FIGS. 1 and 2; FIG. 3 is a sectional view along IV-IV in FIG. 2; FIG. 5 is a cross-sectional view taken along line VV of FIG. 4; (a) is a front view of the reinforcing member shown in FIGS. 3 to 5, (b) is a right side view thereof, and (c) is a sectional view taken along line VIc-VIc of (b). It is a right side showing another example of the present invention. It is a principal part schematic perspective view which shows an example of a prior art.

Preferred embodiments of the present invention will be specifically described below with reference to the drawings.
Elements identical or similar to those of the prior art shown in FIG. 8 are given the same reference numerals as appropriate.

A vehicle structure B shown in FIGS. 1 and 2 includes a floor portion 2 (front floor portion) of a passenger compartment 10 of a vehicle A, a floor tunnel portion 20 provided in the floor portion 2, a pair of left and right floor cross portions 3, and an additional and a reinforcing member 5 provided inside the floor tunnel portion 20 .
1 are a pair of left and right front side members 6, which are spaced apart from each other in the width direction of the vehicle and extend in the front-rear direction of the vehicle. , a region joined to the lower surface side of the floor portion 2, and the like.
In FIG. 2 , reference numeral 19 indicates a cowl provided on the dash panel 21 .

The floor portion 2 is configured by joining the front end portion of the floor panel 22 to the lower region of the dash panel 21 . The floor tunnel portion 20 is formed integrally with or separately from the floor portion 2, and has both side wall portions 20a and an upper wall portion 20b extending in the vehicle front-rear direction and positioned substantially centrally in the vehicle width direction of the floor portion. ing. An exhaust muffler (not shown) and the like are arranged inside the floor tunnel portion 20 .

The pair of floor cross portions 3 are arranged on the left and right sides of the floor tunnel portion 20 on the floor portion 2 and extend in the vehicle width direction to bridge the floor tunnel portion 20 and the rocker 18 . Both ends of each floor cloth portion 3 in the longitudinal direction are joined to the side wall portion 20a of the floor tunnel portion 20 and the rocker 18 by means of welding or the like. As shown in FIG. 3, the floor cloth portion 3 is, for example, open downward and is constructed using a hat-shaped cross-sectional member having a pair of flange portions 30. The pair of flange portions 30 are It is joined to the floor panel 22 .

The pair of additional floor cross portions 4 are located on the vehicle rear side of the floor cross portion 3 and extend in the vehicle width direction, and have the same shape as the floor cross portion 3 and are similar to the floor cross portion 3. , the floor tunnel portion 20 and the rocker 18 are bridged and connected.

The floor cloth portion 3 and the additional floor cloth portion 4 are provided with box-shaped brackets 8a and 8b for mounting the vehicle seat 7 shown in FIG. Brackets 8c and 8d are attached. Reference numeral 70 in FIG. 4 denotes a bracket (mounting target portion) on the vehicle seat 7 side.

The reinforcing member 5 is a member for reinforcing the portion of the floor tunnel portion 20 where the pair of floor cloth portions 3 are joined, and is formed by subjecting a metal plate to bending press working. As shown in FIG. 6, the reinforcing member 5 has a hat-like shape when viewed from the front. It has a plate portion 52 and an upper front projecting portion 53 . A series of concave portions 54 are formed in the base portion 50, the upright plate portion 51, and the upper plate portion 52 by press working. ing. As will be described later, when the reinforcing member 5 is joined to the floor tunnel portion 20, both the floor tunnel portion 20 and the reinforcing member 5 form a closed cross-sectional structure with the concave portion 54 as an internal space. be.
The upper front protruding portion 53 is a portion in which the upper region of the upper plate portion 52 and the standing plate portion 51 protrudes forward of the vehicle by an appropriate dimension L from the other portions of the reinforcing member 5 .

As shown in FIGS. 3 to 5, the reinforcing member 5 is arranged inside the floor tunnel portion 20, and each portion of the reinforcing member 5 includes both side wall portions 20a, an upper wall portion 20b, and an upper wall portion 20b of the floor tunnel portion 20. and of the floor portion 2 near the floor tunnel portion 20 and are welded to these portions. As a result, the reinforcing member 5 indirectly bridges and connects the ends of the pair of floor cloth portions 3 . With such a configuration, for example, when a side collision occurs in the vehicle A and a collision load is input to one of the pair of floor cross portions 3 from the outer side in the vehicle width direction, this load is reinforced. The force can be transmitted to the other floor cloth portion 3 via the member 5 and can be received by the other floor cloth portion 3, so that the collision load resistance performance can be enhanced.

The upper front protruding portion 53 of the reinforcing member 5 abuts over both the upper portion of each side wall portion 20a and the upper wall portion 20b of the floor tunnel portion 20 and is joined to these portions. The upper front projecting portion 53 overlaps the boundary portion 25 between each side wall portion 20 a and the upper wall portion 20 b of the floor tunnel portion 20 .

Next, the operation of the vehicle structure B described above will be described.

That is, when a frontal collision of the vehicle A occurs, a force F1 is generated to rotate the vehicle seat 7 in a forward tilted state. Therefore, a rotational force F2 acting in the same direction as the force F1 acts on the floor cross portion 3, and this rotational force F2 also acts on the side wall portion 20a of the floor tunnel portion 20 and the reinforcing member 5. As shown in FIG. On the other hand, part of the rotational force F2 is received at the place where the upper front protrusion 53 of the reinforcing member 5 and the boundary 25 between the side wall 20a and the upper wall 20b of the floor tunnel section 20 overlap. be able to. Since the upper front protruding portion 53 protrudes further toward the vehicle front than the lower portion of the reinforcing member 5, the upper front protruding portion 53 is rotated downward from the upper rear side of the vehicle, as shown in FIG. It is possible to effectively receive the rotational force F2 that is to be caused. In addition, the boundary portion 25 of the floor tunnel portion 20 is the portion with the highest strength among the portions of the floor tunnel portion 20, and this portion is efficiently reinforced by the upper front projection portion 53 so as not to be easily deformed.

For this reason, it is appropriate that the floor tunnel portion 20 is easily deformed (cross-section collapsed) due to the above-described rotational force F2 while suppressing thickening of the reinforcing member 5 and the floor tunnel portion 20. to be resolved. Therefore, when a frontal collision of the vehicle A occurs, it is also possible to appropriately prevent or suppress the vehicle seat 7 from falling forward. In addition, it is expected that the rigidity of the vehicle seat 7 is increased when the vehicle A does not have a frontal collision.

FIG. 7 shows another embodiment of the invention. In the figure, elements identical or similar to those in the above embodiment are denoted by the same reference numerals as in the above embodiment, and repeated explanations are omitted.

The reinforcing member 5A shown in FIG. 7 has a substantially triangular shape in a side view in which the width La of the side plate portion 51 on the front side of the recessed portion 54 expands from the lower side to the upper side of the side plate portion 51 . The upper region of the side plate portion 51 and the front region (protruding region) of the upper plate portion 52 correspond to the upper front protruding portion 53 .
Even with such a configuration, it is possible to obtain the effects intended by the present invention. As can be understood from the present embodiment, the upper front projecting portion according to the present invention only needs to project further toward the vehicle front side than the lower region of the reinforcing member, and the specific method of projecting is not limited.

The invention is not limited to the content of the embodiments described above. The specific configuration of each part of the vehicle structure according to the present invention can be modified in various ways within the intended scope of the present invention.

B Vehicle structure 2 Floor part 20 Floor tunnel part 20a Side wall part (of the floor tunnel part)
20b Upper wall (of floor tunnel)
25 Boundary (between side wall and top wall of floor tunnel)
3 Floor cross parts 5, 5A Reinforcement member 53 Upper front projection (of reinforcement member)
7 vehicle seat 8a, 8b bracket

Claims (1)

Left and right side wall portions extending in the longitudinal direction of the vehicle and extending upward from the general portion of the floor portion, and an upper wall portion positioned between the upper portions of the both side wall portions. a floor tunnel section having
a pair of left and right floor cross portions extending in the vehicle width direction with one end portions thereof joined to the side wall portions of the floor tunnel portion and to which the front portion side of the vehicle seat is attached;
a reinforcing member that is joined to the floor tunnel portion and bridges and connects one ends of the pair of floor cross portions;
A vehicle structure comprising:
The reinforcing member is
A hat-shaped member in a front view disposed inside a region of the floor tunnel portion located between the pair of floor cross portions,
an upper plate portion and a pair of upright plate portions superimposed and joined to the lower surface side of the upper wall portion and the inner surface side of the side wall portions of the floor tunnel portion;
Projecting from the lower end portions of the pair of upright plate portions in a manner bent outward in the vehicle width direction, and overlapping the lower surface side of the vicinity of the side wall portions of the floor tunnel portion among the general portions of the floor portion. a pair of base portions joined together;
Provided on the upper plate portion so as to protrude toward the front side of the vehicle from the pair of base portions , and overlapped and joined to the inner surface side of the boundary portion between the side wall portions of the floor tunnel portion and the upper wall portion. and an upper front protrusion that is
and
The upper plate portion, the pair of standing plate portions, and the pair of base portions are formed with recessed portions extending in the vehicle width direction in a plan view. A vehicle structure, wherein a closed cross-sectional structure is formed with the concave portion as an internal space .

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