JP7197254B2 - vehicle structure - Google Patents

Description

TECHNICAL FIELD The present invention relates to a vehicle structure suitable for mounting a charging device such as a battery in a vehicle interior.

A specific example of this type of vehicle structure is disclosed in Patent Document 1.
The vehicle structure described in the document is a structure for mounting a battery in a vehicle compartment, and a bracket for attaching the front part of the battery is provided on the floor part of the vehicle compartment. However, the location where the bracket is provided is a position that overlaps the upper side of the lower floor member (in the document, the floor under reinforcement). The under-floor member is a member positioned on the lower surface side of the floor portion of the passenger compartment and extending in the vehicle front-rear direction.
With such a configuration, it is possible to increase the erection rigidity of the bracket.

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

That is, when a battery is mounted in a vehicle interior, it is desired to increase the holding rigidity of the battery as much as possible to stabilize the mounting state of the battery and ensure reliability. If the battery is of relatively large size, the weight of the battery will be considerably greater, and this need will be even more pronounced. In addition, when a frontal collision of the vehicle occurs and a large load is input to the vehicle from the front side of the vehicle, it is undeniable that part of the load may be input to the mounting location of the front portion of the battery. Even in such a case, it is desired that the fixed state of the battery is appropriately maintained. In the prior art, the mounting rigidity of the battery bracket is increased by using the underfloor member, but considering the above-mentioned circumstances, it is difficult to say that the mounting rigidity of the bracket is sufficient. , there is still room for improvement.

JP 2013-107592 A

The present invention has been devised under the circumstances as described above. The object is to provide a vehicle structure capable of ensuring reliability.

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

A vehicle structure provided by the present invention is provided between a charging device mounted on a floor of a vehicle compartment and a pair of left and right rockers positioned at both ends of the floor in the vehicle width direction and extending in the vehicle front-rear direction. a floor cross member bridge-connected and positioned on the vehicle front side of the charging device and extending in the vehicle width direction; a floor tunnel portion extending in the vehicle front-rear direction and bulging upward, wherein the rear end portion of the floor tunnel portion and the floor cross member are spaced apart from each other in the vehicle front-rear direction. It is characterized by being set in the arrangement.

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 an exploded perspective view of a main part showing an example of a vehicle structure according to the present invention; FIG. (a) is a principal part perspective view of the vehicle structure shown in FIG. 1, (b) is a partially enlarged perspective view of (a). (a) is a cross-sectional view of the main part of the vehicle structure shown in FIG. 1 with a battery attached (corresponding to the IIIa-IIIa cross section in FIG. 1), and (b) is a different part from (a). 1 is an enlarged cross-sectional view of a main part of FIG. 3(a) is a sectional view taken along line IVa-IVa of FIG. 3(a), and (b) is a sectional view taken along line IVb-IVb of FIG. 3(a).

Preferred embodiments of the present invention will be specifically described below with reference to the drawings.

The vehicle structure A shown in FIG. It comprises a pair of welded left and right side members 4, a pair of left and right inner members 5 (5A, 5B), and a pair of left and right brackets 7 (7A, 7B) for mounting a battery 6 as an example of a vehicle interior load. .
A vehicle to which the structure A of this 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 metal hydride secondary battery, or the like.

The floor portion 3 is configured 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 positioned under the right and left sides of the vehicle body and extend in the longitudinal direction of the vehicle. A dash panel 39 is connected to the vehicle front side of the floor portion 3 , and a floor tunnel portion 30 is formed in a front region of the floor portion 3 .

The first and second floor cross members 1 and 2 are provided on the rear side of the vehicle from the floor tunnel portion 30 on the upper surface side of the floor portion 3, and bridge-connected between the pair of rockers 8. It extends in the width direction of the vehicle. These first and second floor cross members 1 and 2 are, for example, as shown in FIG. are welded in face-to-face contact with the upper surface of the For example, a front seat (seat) (not shown) is installed across the first and second floor cross members 1 and 2, and a battery 6 is arranged in a space below the front seat.
As will be described later, the first floor cross member 1 is directly used to increase the erection rigidity of the bracket 7, and corresponds to an example of the "floor cross member" in the present invention. The second floor cross member 2 in this embodiment does not correspond to the "floor cross member" of the present invention.

The pair of inner members 5 (5A, 5B) are positioned at the base portions (lower portions) on both the left and right sides of the floor tunnel portion 30 to reinforce these portions, and are substantially straight from the floor tunnel portion 30 toward the rear side of the vehicle. and is provided over substantially the entire length of the floor portion 3 in the vehicle front-rear direction. This inner member 5 is constructed using a member having a hat-shaped cross section, as shown in FIGS. However, unlike the first and second floor cross members 1 and 2, the pair of upper left and right flange portions 50 are welded to the floor portion 3 while in face-to-face contact with the lower surface portion of the floor portion 3. .

The pair of side members 4 extends in the vehicle front-rear direction from the pair of inner members 5 on both sides of the vehicle width, and extends continuously 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. there is Like the inner member 5, the side member 4 is also constructed using a member with a hat-shaped cross section, and the pair of upper left and right flange portions 40 are welded to the floor portion 3 while being in face-to-face contact with the lower surface portion of the floor portion 3. It is

Both the side member 4 and the inner member 5 are members positioned on the lower surface side of the floor portion 3 and extending in the longitudinal direction of the vehicle. It is used directly to increase the rigidity of the installation and is an example of a "underfloor member".
In the vehicle structure A of the present embodiment, the inner member 5 and the first floor cross member 1 intersect in plan view and are joined (welded) to each other through the floor portion 3 at the intersection portions C (Ca, Cb). ) is formed.

As shown in FIG. 2(b), the brackets 7 (7A, 7B) for the items mounted in the vehicle include a substantially horizontal plate-shaped base portion 70 with a raised central portion and a continuous portion in front of the base portion 70. The base portion 70 has a bolt 72 such as a stud bolt projecting upward.

The pair of brackets 7 are arranged adjacent to the intersection C (Ca, Cb) such that their front portions overlap the upper side of the intersection C (Ca, Cb). It is directly or indirectly welded to the member 1, the floor portion 3, and the inner member 5. Welding is, for example, spot welding.
More specifically, the pair of brackets 7A and 7B are joined via a welded portion W such that the standing wall portion 71 is in face-to-face contact with the side wall portion 11 on the rear side of the first floor cross member 1. In addition, the front portion of the base portion 70 is overlapped on the upper side of the flange portion 10 on the rear side of the first floor cross member 1 and joined via the weld portion W, and is further rearward than the front portion of the base portion 70 . The side portion is joined to the floor portion 3 via a weld W.

However, one bracket 7A is arranged such that one side edge portion 75a in the vehicle width direction overlaps the upper side of the flange portion 50 on one side of the inner member 5A. As a result, the side edge portion 75a of the bracket 7A and the flange portion 50 of the inner member 5A are indirectly joined by the weld portion W with the floor portion 3 interposed therebetween. At the mounting location of the bracket 7A, there is formed a portion where the front portion of the base portion 70, the flange portion 10 of the first floor cross member 1, the floor portion 3, and the flange portion 50 of the inner member 5A are overlapped. , are indirectly joined by a welded portion Wa with the floor portion 3 interposed therebetween.

The other bracket 7B differs from the other bracket 7A in that both side edges 75b in the vehicle width direction overlap with the upper sides of the two flanges 50 of the inner member 5B. However, other than this, it is the same as the one bracket 7A, and a detailed description thereof will be omitted (in the drawings, the same reference numerals as those on the inner member 5A side are given to the same parts as those on the inner member 5A side).
The bracket 7A is displaced in the vehicle width direction with respect to the inner member 5A, while the bracket 7B is not displaced in the vehicle width direction with respect to the inner member 5B. This takes into consideration various specifications such as the arrangement of the battery 6 and installation conditions of the battery 6 . Unlike this embodiment, both the brackets 7A and 7B may be shifted in the vehicle width direction with respect to the inner member 5, or may not be shifted.

As shown in FIG. 3A, front and rear support pieces 61 and 62 are provided at the front and rear portions of the battery 6. The front support piece 61 is attached to the bolt 72 of the bracket 7 and attached thereto. The front portion of the battery 6 is fixed by fastening with a screwed nut 72a. The rear support piece 62 is fastened to the second floor cross member 2 using, for example, a screw hole 29 provided in the upper surface of the second floor cross member 2 and a bolt 69 screwed therewith. , and thereby the rear portion of the battery 6 is fixed.

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

First, the inner member 5 is a highly rigid member that extends in the vehicle front-rear direction over substantially the entire length of the floor portion 3. The first floor cross member 1 is bridge-connected to a pair of rockers 8 and extends in the vehicle width direction. It is a highly rigid member. In particular, both the inner member 5 and the first floor cross member 1 are linearly extending members, and have a single member or similar structure, so that their rigidity and mechanical strength are higher. . Therefore, these intersections C are also highly rigid portions. The brackets 7 (7A, 7B) are adjacent to such highly rigid intersections C (Ca, Cb) and are provided in a partially overlapping arrangement, and are welded to them. Therefore, the erection rigidity of each bracket 7 can also be increased.

In particular, a portion of each bracket 7 is directly welded to the first floor cross member 1, and another portion of each bracket 7 is welded to the flange portion 50 of the inner member 5 via the floor portion 3. In addition, each bracket 7 straddles both the first floor cross member 1 and the inner member 5 and is joined to them. Therefore, the erection rigidity of the bracket 7 is further enhanced. The front portion of each bracket 7, the flange portion 10 of the first floor cross member 1, the floor portion 3, and the flange portion 50 of the inner member 5 are superimposed on each other and welded integrally by the welding portion Wa. Since the jointed portion is also provided, it is possible to further increase the joint strength of each bracket 7 with respect to the crossing portion C, and thus the erection rigidity.
As described above, it is possible to make the state of attachment and fixing of the battery 6 using the bracket 7 robust, and to enhance the reliability of the attachment of the battery 6 .
Since the side member 4 is also present in the vicinity of the mounting location of the bracket 7, the erection rigidity of the bracket 7 can be further increased.

The first floor cross member 1 and the inner member 5 are vehicle body components originally provided in many vehicles, and in the present embodiment, these members 1 and 5 are effectively used when the bracket 7 is attached. ing. Therefore, the structure is rational, and it is possible to eliminate the need to separately use a dedicated member for reinforcing the mounting location of the bracket 7 . As a result, an increase in manufacturing cost and an increase in vehicle weight can be appropriately suppressed.

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.

In the above-described embodiment, the front portion of the bracket 7 is arranged adjacent to the intersection C between the first floor cross member 1 and the inner member 5 so as to overlap the intersection C above the intersection C. is not limited to this. For example, it is possible to arrange the bracket 7 so that substantially the entire area of the bracket 7 overlaps the crossing portion C, or to arrange the bracket 7 adjacent to the crossing portion C without overlapping the crossing portion C.

The "underfloor member" is not limited to the inner member 5, and can be the side member 4, for example.
The "floor cross member" as used in the present invention is not limited to the first floor cross member 1,
For example, it could be a second floor crossmember.
As the under-floor member and the floor cross-member, those having a cross-sectional shape different from the hat-shaped cross-section can also be used.
The "charging device" as used in the present invention is not limited to batteries, but includes capacitors, for example.
Although the bracket 7 is provided with the bolt 72 in the above-described embodiment, the present invention is not limited to this. Instead of or in addition to the bolts 72, other screw members such as nuts or screw holes may be provided.

A Vehicle structure C (Ca, Cb) Intersection 1 First floor cross member (floor cross member)
3 floor part 30 floor tunnel part 4 side member 5 (5A, 5B) inner member 6 battery (charging device)
7 (7A, 7B) Brackets for items mounted in the vehicle interior 8 Rockers

Claims (1)

a charging device mounted on the floor of the passenger compartment;
A floor located on the vehicle width direction opposite end sides of the floor portion and connected between a pair of left and right rockers extending in the vehicle front-rear direction, and located on the vehicle front side of the charging device and extending in the vehicle width direction. a cross member;
a floor tunnel portion that is provided in a front region of the floor portion so as to be positioned on the vehicle front side of the floor cross member, extends in the vehicle front-rear direction, and bulges upward;
and
A vehicle structure according to claim 1, wherein the rear end portion of the floor tunnel portion and the floor cross member are arranged to be spaced apart from each other in the longitudinal direction of the vehicle.

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