JP7099797B2 - Vehicle structure - Google Patents

Description

The present invention relates to a vehicle structure such as an automobile that can suitably cope with a side collision of a vehicle.

As an example of the vehicle structure, there is one described in Patent Document 1.
In the vehicle structure described in the same document, a rocker extending in the vehicle front-rear direction is provided on the outer side of the floor portion of the vehicle interior in the vehicle width direction, and the floor portion of the floor portion is within the vehicle width direction of the rocker. A plurality of beads having an arc shape in a plan view are provided in the region on the side. Each bead is a portion where a part of the floor portion is partially bulged in the vertical height direction. Side members extending in the front-rear direction of the vehicle are welded to the lower surface of the floor.

According to such a configuration, the rigidity of the floor portion is increased by the presence of the plurality of beads. Therefore, when a side collision of the vehicle occurs and the collision load is input to the vehicle side from the outside in the vehicle width direction, it is possible to suppress the large deformation of the floor portion inward in the vehicle width direction. Is. This is useful for protecting the battery, for example, when the battery is mounted in the area closer to the center in the vehicle width direction of the floor portion in the vehicle interior, and is also preferable from the viewpoint of occupant protection.

However, in the above-mentioned prior art, there is still room for improvement as described below.

That is, it is required that the protection performance at the time of a side collision of the vehicle against the vehicle interior loading such as a battery and the occupant is as excellent as possible. On the other hand, in the above-mentioned prior art, a plurality of arcuate beads are formed on the floor portion to increase the rigidity of the floor portion, thereby merely corresponding to the side collision of the vehicle. In this case, when a side collision of the vehicle occurs and a large collision load is input from the outside of the vehicle to the side of the vehicle, most of this collision load is transmitted to the side members via the floor. As a result, the weld between the side member and the floor portion may be peeled off, and the vehicle body may be significantly deformed. If such a large deformation occurs, it becomes difficult to sufficiently protect the vehicle interior equipment such as a battery and the occupants.

Japanese Unexamined Patent Publication No. 2006-298076

The present invention has been conceived under the above-mentioned circumstances, and by means of a simple structure, the deformation of the vehicle body at the time of a side collision of the vehicle is suppressed, and the protection performance of the vehicle interior mounted objects and occupants is suppressed. The challenge is to provide a vehicle structure that can be made superior to the conventional one.

In order to solve the above problems, the following technical means are taken in the present invention.

The vehicle structure provided by the present invention is a pair of left and right rockers that are located on both outer sides of the floor of the vehicle compartment in the vehicle width direction and extend in the front-rear direction of the vehicle, and are bridged and connected between the pair of rockers. The first and second floor cross members extending in the vehicle width direction and joined to the floor portion are located inward in the vehicle width direction with respect to the pair of rockers and extend in the vehicle front-rear direction. A vehicle structure comprising a side member joined to a floor portion, which is arranged between the side member and each rocker and is overlapped with an upper surface portion or a lower surface portion of the floor portion. Further, a backing plate-shaped reinforcing member to be joined is further provided, and the backing plate-shaped reinforcing member is bridged and connected between the first and second floor cross members in the front-rear direction of the vehicle. In the vehicle width direction, it is provided in a position separated from the side member, and in the backing plate-shaped reinforcing member, a part of the backing plate-shaped reinforcing member is partially in the vertical thickness direction as compared with other general parts. A plurality of vehicle width direction beads and a plurality of auxiliary beads are provided as the bulging internal hollow beads, and the plurality of vehicle width direction beads have an upright side wall portion extending in the vehicle width direction and. While the plurality of auxiliary beads are arranged at intervals in the front-rear direction of the vehicle, the plurality of auxiliary beads are formed with a second recess as an inner region of the plurality of auxiliary beads at a position between the plurality of vehicle width direction beads. It is characterized in that the upright side wall portion of the plurality of vehicle width direction beads is provided with a first recess connected to the second recess .

With such a configuration, the following effects can be obtained.
That is, when a side collision of the vehicle occurs and a collision load is input to the vehicle side from the outside in the vehicle width direction, this collision load acts on the backing plate-shaped reinforcing member, but the backing plate-shaped reinforcing member is Since the first and second floor cross members are bridged and connected to each other, large deformation or displacement inward in the vehicle width direction is suppressed. Further, since the backing plate-shaped reinforcing member is arranged so as to be separated from the side members in the vehicle width direction, when the backing plate-shaped reinforcing member and the floor portion receive a collision load, the backing plate-shaped reinforcing member is formed in the floor portion. Bending deformation can be caused in the floor portion starting from the portion between the reinforcing member and the side member. Due to this bending deformation, it is suppressed that a large load is transmitted from the backing plate-shaped reinforcing member and the floor portion to the side member. As a result, it is possible to eliminate the problem that the joint state between the side member and the floor portion is released, and it is possible to effectively prevent the vehicle body from being significantly deformed. As a result, it is possible to improve the protection performance of the vehicle interior such as a battery and the occupants.
Although the backing plate-shaped reinforcing member is used in the present invention, the backing plate-shaped reinforcing member may be relatively thin and lightweight. Therefore, it is possible to appropriately suppress an increase in manufacturing cost and an increase in vehicle weight.

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

It is a main part exploded perspective view which shows an example of the vehicle structure which concerns on this invention. It is sectional drawing of the main part in the vehicle structure shown in FIG. 1 with a battery attached, and corresponds to the sectional view II-II of FIG. (A) is a bottom view of a main part of the vehicle structure shown in FIG. 1, and (b) is a bottom view of a backing plate-shaped reinforcing member used in the vehicle structure shown in (a). (A) is a sectional view taken along the line IVa-IVa of FIG. 3 (b), and FIG. 3 (b) is a sectional view taken along the line IVb-IVb of FIG. 3 (b). (A) is a cross-sectional view of Va-Va of FIG. 3 (b), and FIG. 3 (b) is a cross-sectional view of Vb-Vb of FIG. 3 (b). FIG. 3 is a perspective view of a main part of the vehicle structure shown in FIG. 1 from the lower side of the vehicle. (A) is a cross-sectional view taken along the line VIIa-VIIa of FIG. 1, and (b) and (c) are explanatory views of the operation of (a).

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

The vehicle structure A shown in FIG. 1 includes a floor portion 3 of a vehicle interior, a pair of left and right rockers 8, first and second floor cross members 1 and 2, a pair of left and right side members 4, and a backing plate-like reinforcing member 7. I have.

The floor portion 3 is configured by using a floor panel made of a metal plate, and a pair of left and right rockers 8 are joined to both sides in the vehicle width direction. The pair of rockers 8 are members that are located at the lower portions of the left and right sides of the vehicle body and extend in the front-rear direction of the vehicle, and form, for example, the lower edge portion of the door opening. A dash panel 39 is connected to the front side of the vehicle of the floor portion 3, and a floor tunnel portion 30 is formed in a region near the front of the floor portion 3.

The first and second floor cross members 1 and 2 are provided on the rear side of the vehicle on the upper surface side of the floor portion 3 with respect to the floor tunnel portion 30, and are bridged and connected to each other of the pair of rockers 8. It extends in the width direction of the vehicle. As shown in FIG. 2, for example, the first and second floor cross members 1 and 2 are configured by using a cross-section hat-shaped member, and are welded to the upper surface portion of the floor portion 3. On the first and second floor cross members 1 and 2, for example, a front seat (seat) (not shown) is installed so as to straddle the space below the front seat, that is, the first and second floors. A battery 6 is arranged between the cross members 1 and 2.

The vehicle to which the structure A of the present embodiment is applied is, for example, a hybrid vehicle or an electric vehicle, and the battery 6 is a lithium ion secondary battery, a nickel hydrogen secondary battery, or the like. The battery 6 is attached, for example, by means for fastening the front support piece 6a of the battery 6 to the bracket 94 fixed to the floor 3 using bolts and nuts 90, 91, and the rear support piece of the battery 6. 6b is made by using the means for fastening the screw hole 92 of the second floor cross member 2 and the bolt 93 screwed therein.

The pair of side members 4 are members located inward in the vehicle width direction with respect to the pair of rockers 8 and extending in a series in the vehicle front-rear direction from the vicinity of the front end portion to the vicinity of the rear end portion of the vehicle. As shown in FIG. 7, each side member 4 is configured by using a cross-section hat-shaped member, and is welded to the lower surface portion of the floor portion 3. A pair of left and right inner members 5 located further inward in the vehicle width direction than the pair of side members 4 are also welded to the lower surface portion of the floor portion 3. These pair of inner members 5 are located at the bases (lower parts) on both the left and right sides of the floor tunnel portion 30 to reinforce this portion, and extend substantially linearly toward the rear side of the vehicle from the floor tunnel portion 30. , Like the side member 4, for example, it is configured by using a cross-section hat-shaped member.

The backing plate-shaped reinforcing member 7 is a member having a plurality of vehicle width direction beads 71 and auxiliary beads 72, which will be described later, and is formed by press-molding a metal plate or the like. It is welded to the lower surface of the area with the halftone dot pattern. As is often shown in FIG. 3, the backing plate-shaped reinforcing member 7 includes a plurality of vehicle width direction beads 71 (parts with halftone dots in FIG. 3 (b)), a plurality of auxiliary beads 72, and a plurality of auxiliary beads 72. It is provided with a plurality of first and second recesses 73a and 73b.

The plurality of vehicle width direction beads 71 are portions that bulge downward from the other general portion 70 of the backing plate-like reinforcing member 7 (the front side in the direction orthogonal to the paper surface in FIG. 3), and have a vehicle width. It extends in the direction and is lined up at intervals in the front-rear direction of the vehicle. As shown in FIG. 4, the inside of each vehicle width direction bead 71 is hollow, and the upper surface thereof is open.
The plurality of auxiliary beads 72 are located between the plurality of vehicle width direction beads 71 and are formed so as to connect the plurality of vehicle width direction beads 71 to each other. It bulges below the general part 70. However, the bulging dimension Hb is smaller than the bulging dimension Ha of the bead 71 in the vehicle width direction.

As is often shown in FIG. 5 (b), each auxiliary bead 72 has a hollow inside, and each auxiliary bead 72 forms an upper opening-shaped recess 73b (second recess). .. On the other hand, as is clearly shown in FIG. 5A, each vehicle width direction bead 71 has an upper opening corresponding to the second recess 73b at the upper portion of the upright side wall portion 71a extending in the vehicle width direction. The recess 73a (first recess) is formed. These first and second recesses 73a and 73b are
As will be described later, this is a portion that serves as a starting point (rigidity break point) for bending and deforming the backing plate-shaped reinforcing member 7 and the floor portion 3 downward when a side collision of the vehicle occurs.

The backing plate-shaped reinforcing member 7 is set so as to be located between the rocker 8 and the side member 4 in the vehicle width direction, and is joined to the lower surface portion of the floor portion 3. A gap C having an appropriate width La is formed between the side member 4 and the backing plate-shaped reinforcing member 7, and both of them are directly in a non-bonded state. The backing plate-shaped reinforcing member 7 and the rocker 8 may be joined or not joined.
On the other hand, the backing plate-shaped reinforcing member 7 is set in a state of being bridged and connected between the first and second floor cross members 1 and 2 in a plan view in the vehicle front-rear direction. The front portion and the rear portion of the backing plate-shaped reinforcing member 7 are joined to the second floor cross members 1 and 2 via the floor portion 3.
The joining of the backing plate-shaped reinforcing member 7 to the floor portion 3 is achieved, for example, by spot welding a plurality of places of the backing plate-shaped reinforcing member 7.

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

First, of the floor portion 3, the portion to which the backing plate-shaped reinforcing member 7 is joined has higher mechanical strength (rigidity) than the portion to which the backing plate-like reinforcing member 7 is joined, and a side collision of the vehicle occurs. As shown in (b), when the collision load F is input to the vehicle side from the outside in the vehicle width direction, the collision load F is received by the backing plate-shaped reinforcing member 7. Here, as described above, the backing plate-shaped reinforcing member 7 is in a state of being bridged and connected to the first and second floor cross members 1 and 2, so that it is not easily displaced inward in the vehicle width direction. It is possible to do so.

On the other hand, the backing plate-shaped reinforcing member 7 and the side member 4 are separated from each other, and a gap C having an appropriate width La is formed between them. Therefore, in this portion, for example, as indicated by an arrow Na. In addition, it is possible to cause a partial bending deformation in which a part of the floor portion 3 bends downward. Based on this bending deformation, a shock absorbing action at the initial stage of collision can be obtained. Moreover, since the bending deformation is performed at a position adjacent to the side member 4, there is also an action of making it difficult for the deformation and displacement of the floor portion 3 to reach the side member 4. Therefore, it is suppressed that a large load is transmitted from the backing plate-shaped reinforcing member 7 to the side member 4. If there is a large load transmission to the side member 4, for example, the weld between the side member 4 and the floor portion 3 may peel off and the vehicle body may be significantly deformed. It is possible to appropriately prevent such a risk. ..

According to the backing plate-shaped reinforcing member 7 in the present embodiment, the following actions can be further obtained.
That is, the plurality of bead 71s in the vehicle width direction of the backing plate-shaped reinforcing member 7 extend in the vehicle width direction, and have high strength against the compressive load in the vehicle width direction. Therefore, when the collision load F is input to the vehicle side from the outside in the vehicle width direction, excellent load bearing performance can be obtained. Further, in the middle and late stages of the side collision of the vehicle, the floor portion 3 is the arrow in FIG. 7 (c) at the place where the first and second recesses 73a and 73b of the backing plate-shaped reinforcing member 7 are formed. As shown by Nb, a downward bending deformation occurs. This is because the first and second recesses 73a and 73b are provided on the upper part of the backing plate-shaped reinforcing member 7, so that the collision load F acts on the backing plate-shaped reinforcing member 7 from the outside in the vehicle width direction. This is because the bending force as shown by the arrow Fa is generated in both sides of the first and second recesses 73a and 73b in the vehicle width direction. Due to the bending deformation described above, the collision ernegi is effectively absorbed, and excellent shock absorption performance can be obtained. Therefore, it is more reliably suppressed that a large load is applied from the floor portion 3 to the side member 4.

Further, since the bending deformation of the backing plate-shaped reinforcing member 7 and the floor portion 3 is performed so that the floor portion 3 is lowered, this bending deformation does not adversely affect the battery 6 and the occupant located on the upper side of the floor portion 3. It is also possible to do so. Therefore, it is possible to improve the protection performance of the battery 6 and the occupant.

If the backing plate-shaped reinforcing member 7 is simply bent and deformed at the time of a side collision of the vehicle, for example, the support plate-shaped reinforcing member 7 is not provided with the auxiliary bead 72, and the plurality of vehicle width direction beads 71 are simply the first. It is sufficient to have a configuration in which only the recess 73a is provided, but according to such a configuration, there is a possibility that the bead 71 in the vehicle width direction is immediately greatly bent and deformed at the initial stage of the collision. On the other hand, in the present embodiment, in addition to the vehicle width direction bead 71, the auxiliary bead 72 is further provided, and the first and second recesses 73a and 73b are provided. It is possible to solve the problem.

In addition, in the present embodiment, the above-mentioned action can be obtained based on a simple configuration in which the backing plate-shaped reinforcing member 7 is joined to the floor portion 3, but the backing plate-shaped reinforcing member 7 is thin and lightweight. It is possible to make it. Therefore, it is possible to appropriately suppress an increase in manufacturing cost and an increase in vehicle weight.

The present invention is not limited to the contents of the above-described embodiments. The specific configuration of each part of the vehicle structure according to the present invention can be variously redesigned within the scope of the present invention.

The backing plate-like reinforcing member may be configured to be joined to the upper surface portion of the floor portion instead of or in addition to being joined to the lower surface portion of the floor portion.

A Vehicle structure 1, 2 1st and 2nd floor cross member 3 Floor part 4 Side member 6 Battery 7 Support plate-like reinforcing member 8 Rocker

Claims (1)

A pair of left and right rockers that are located on both outer sides of the floor of the vehicle compartment in the vehicle width direction and extend in the front-rear direction of the vehicle.
The first and second floor cross members that are bridged and connected to each other between the pair of rockers, extend in the vehicle width direction, and are joined to the floor portion.
A side member that is located inward in the vehicle width direction with respect to the pair of rockers, extends in the front-rear direction of the vehicle, and is joined to the floor portion.
The vehicle structure is equipped with
Further, a backing plate-like reinforcing member is further provided, which is arranged between the side member and each of the rockers, and is overlapped and joined to the upper surface portion or the lower surface portion of the floor portion.
The backing plate-shaped reinforcing member is provided so as to be bridged and connected between the first and second floor cross members in the vehicle front-rear direction, while being separated from the side members in the vehicle width direction. Has been
The backing plate-shaped reinforcing member includes a plurality of bead in the vehicle width direction and a plurality of beads as an internal hollow bead in which a part of the backing plate-shaped reinforcing member partially bulges in the vertical thickness direction as compared with the other general parts. Auxiliary beads are provided,
The plurality of vehicle width direction beads have an upright side wall portion extending in the vehicle width direction and are arranged at intervals in the vehicle front-rear direction, while the plurality of auxiliary beads are of the plurality of vehicle width direction beads. A second recess as an inner region of the plurality of auxiliary beads is provided at a position between the two, and the upright side wall portion of the plurality of vehicle width direction beads is connected to the second recess. A vehicle structure characterized in that a first recess is provided .

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