JP2017124754A - Vehicle lower part structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vehicle lower part structure that is able to improve steering stability.SOLUTION: A vehicle lower part structure comprises: a rear wheel house outer panel 24 composing a vehicle-width-direction outside portions of rear wheel houses 14 arranged in a pair, left and right, on a vehicle rear side of a vehicle 10; a rear side member 18 arranged in a pair, left and right, on the vehicle-width-direction inside with respect to the rear wheel house outer panel 24 and extended along a vehicle forward and backward directions; a pair of lockers 16, left and right, arranged further on the vehicle lower side than the rear side member 18, the vehicle rear side of which is joined to the vehicle front side of the rear wheel house outer panel 24 and extended along the vehicle forward and backward directions; and a bead 50 arranged in a joint part 46 between the rear wheel house outer panel 24 and a locker 16 so as to include a range that is on the vehicle upper side from the locker and on the vehicle lower side from the rear side member 18, as viewed from a vehicle side, and formed such that a substantially vehicle vertical direction is defined as a longitudinal direction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle lower structure.

  The following Patent Document 1 discloses a vehicle rear portion structure. The rear structure of the vehicle includes a pair of left and right rear wheel houses provided on the rear side of the vehicle, and a connecting member provided inside the vehicle width direction of the pair of left and right rear wheel houses and connecting the rear wheel houses in the vehicle width direction. Is provided. Thereby, the vehicle rigidity between the rear wheel houses is improved.

JP 2015-113083 A

  By the way, there is a possibility that the rear wheel house is displaced by the input of the load from the tire in the rear wheel house while the vehicle is traveling. When the rear wheel house is displaced, the contact portion of the suspension supporting the tire with the rear wheel house is also displaced, which may reduce the steering stability. In the configuration disclosed in Patent Document 1, the vehicle rigidity between the rear wheel houses is improved by connecting the pair of left and right rear wheel houses, but depending on the direction of the load input to the left and right rear wheel houses, The house can be displaced, which can reduce steering stability. Therefore, the above prior art has room for improvement in this respect.

  In view of the above problems, an object of the present invention is to obtain a vehicle lower structure capable of improving steering stability.

  According to a first aspect of the present invention, a vehicle lower structure includes a rear wheel house outer panel constituting an outer portion in the vehicle width direction of a rear wheel house disposed in a pair of left and right sides on the vehicle rear side of the vehicle, and the rear wheel house outer panel A pair of left and right rear side members arranged on the inner side in the vehicle width direction and extending along the vehicle front-rear direction, a rear side member disposed below the rear side member, and a vehicle rear side of the rear wheel house outer panel A pair of left and right rockers coupled to the front side of the vehicle and extending along the vehicle front-rear direction, and a coupling portion between the rear wheel house outer panel and the rocker at the vehicle upper side and the rear side member in the vehicle side view It is arranged to include the range on the lower side of the vehicle and substantially in the vertical direction of the vehicle It has a bead which is formed as a longitudinal direction, a.

  According to the first aspect of the present invention, when a load is input from the tire in the rear wheel house while the vehicle is running, the rear wheel house tends to be displaced so as to be twisted around the joint with the rocker. In general, the rear wheel house mainly receives a load along the vehicle vertical direction and the vehicle width direction, which is the movable range of the suspension for holding the tires. Therefore, the rear wheel house mainly focuses on the joint between the rear wheel house outer panel and the rocker. Are substantially displaced along the vehicle vertical direction and the vehicle width direction. That is, the torsional stress is concentrated at the joint between the rear wheel house outer panel and the rocker. Here, a bead is formed at a joint portion between the rear wheel house outer panel and the rocker. This bead is formed so as to include a range above the rocker and above the vehicle and below the rear side member. Therefore, the rigidity of the joint portion between the rear wheel house outer panel and the rocker is improved including the relatively low rigidity between the rocker and the rear side member. Also, since the bead is formed with the vehicle vertical direction as the longitudinal direction, the displacement of the rear wheel house outer panel along the vehicle vertical direction and the vehicle width direction around the connecting portion between the rear wheel house outer panel and the rocker is centered. It can be suppressed more. Thereby, the displacement of the rear wheel house outer panel and hence the rear wheel house is suppressed, and the displacement of the contact portion of the suspension supporting the tire with the rear wheel house is also suppressed.

  The vehicle lower structure according to the first aspect of the present invention has an excellent effect that the steering stability can be improved.

It is a side view showing a vehicle frame provided with a vehicle lower part structure concerning one embodiment. It is a side view which expands and shows the A section of FIG.

  Hereinafter, an embodiment of a vehicle lower structure according to the present invention will be described with reference to FIGS. In these figures, the arrow FR indicates the front side in the vehicle front-rear direction, and the arrow UP indicates the upper side in the vehicle vertical direction.

  As shown in FIG. 1, the vehicle rear side of the vehicle 10 includes a rear pillar 12, a rear wheel house 14, a rocker 16, and a rear side member 18. The rear pillars 12 are provided in a pair of left and right sides, and are provided on the upper side of the vehicle and are extended along the vehicle front-rear direction. The side is connected to the vehicle in the vertical direction.

  The rear wheel house 14 is configured by joining a rear wheel house inner panel 22 provided on the inner side in the vehicle width direction and a rear wheel house outer panel 24 provided on the outer side in the vehicle width direction. The rear wheel house outer panel 24 of the present embodiment has a longitudinal wall-shaped flange portion 26 extending in the vehicle front-rear direction and the vehicle vertical direction, and protrudes outward in the vehicle width direction from the flange portion 26 and has an arc shape in a vehicle side view. The outer cover part 28 is provided and it is set as the press-formed product formed from one steel plate. The outer cover portion 28 is formed along the vehicle upper side of a tire (not shown), and the shape of the outer cover portion 28 when viewed in a longitudinal section along the vehicle width direction is a substantially arc shape. Yes.

  The rear wheel house inner panel 22 protrudes inward in the vehicle width direction from the flange portion 26 of the rear wheel house outer panel 24, and although not shown, an inner cover portion and an inner cover portion that are arc-shaped in a side view of the vehicle And a substantially semicircular vertical wall portion as viewed from the side of the vehicle. Note that a part of a rear suspension for holding a tire disposed in the rear wheel house 14 is in contact with an upper side of the inner cover portion of the vehicle (both not shown).

  A pair of left and right rear side members 18 extending in the vehicle front-rear direction are joined to the vehicle lower side and the vehicle width direction inner side of the rear wheel house inner panel 22. The rear side member 18 is also joined to a vehicle lower side surface of a rear floor (not shown) provided between the pair of left and right rear wheel houses 14. The rear side member 18 has a front end curved toward a rocker 16 described later.

  The rocker 16 is provided in a pair of left and right along the vehicle front-rear direction at both ends of the vehicle 10 in the vehicle width direction on the vehicle lower side. The rocker 16 includes a rocker outer panel 32 that forms an outer portion of the rocker 16 in the vehicle width direction and a rocker inner panel (not shown) that forms an inner portion of the rocker 16 in the vehicle width direction. The rocker outer panel 32 has a substantially U-shaped cross section orthogonal to the vehicle longitudinal direction with the opening directed inward in the vehicle width direction. Further, an upper flange portion 34 and a lower flange portion 36 extending in directions away from each other are formed at the opening end portion of the rocker outer panel 32 (see FIG. 2).

  On the other hand, the rocker inner has a substantially U-shaped cross section viewed from the front-rear direction of the vehicle with the opening directed outward in the vehicle width. Further, an upper flange portion and a lower flange portion that extend in directions away from each other are formed at the opening end portion of the rocker inner panel. The upper flange portion and the lower flange portion are joined to the upper flange portion 34 and the lower flange portion 36 of the rocker outer panel 32, respectively. Thus, the rocker 16 has a closed cross-sectional structure.

  As shown in FIG. 2, the vehicle rear side of the rocker outer panel 32 is configured by a rocker outer rear panel 38. As with the other parts of the rocker outer panel 32, the rocker outer rear panel 38 has a substantially U-shaped cross section orthogonal to the vehicle longitudinal direction with the opening directed inward in the vehicle width direction. Further, an upper flange portion 40 and a lower flange portion 42 are formed at the opening end of the rocker outer panel 32 so as to extend in directions away from each other.

  The rocker outer rear panel 38 has a substantially rectangular shape when viewed from the side of the vehicle, and the vehicle rear side of the rocker outer rear panel 38 and the rear wheel house outer panel 24 are coupled by a coupling portion 46.

  The upper flange portion 34 of the rocker outer panel 32 and the upper flange portion 40 of the rocker outer rear panel 38 are continuously disposed with the flange portion 26 of the rear wheel house outer panel 24. And these upper flange parts 34 and 40 and the flange part 26 comprise some opening edge parts of the rear door opening 48 formed in the substantially rectangular shape provided in the vehicle rear view provided in the vehicle rear side in the vehicle 10. FIG. doing. An opening trim seal (not shown) is attached to the upper flange portions 34 and 40 of the rocker outer panel 32, the upper flange portion of the rocker inner and the flange portion 26 of the rear wheel house outer panel 24.

  A bead 50 that is convex outward in the vehicle width direction is formed on the vehicle rear side and vehicle upper side of the rocker outer rear panel 38. Specifically, the bead 50 is formed in a substantially rectangular shape when viewed from the side of the vehicle, and is arranged to be inclined toward the vehicle upper side as the longitudinal direction moves toward the vehicle rear side. The longitudinal direction of the bead 50 is substantially the same as the longitudinal direction of the upper flange portion 40 of the rocker outer rear panel 38 corresponding to the position where the bead 50 is formed. In other words, the bead 50 extends in the longitudinal direction along a part of the opening edge of the rear door opening 48. The bead 50 is formed to have a convex shape outward in the vehicle width direction, but is not limited thereto, and may be formed to have a convex shape inward in the vehicle width direction.

  Further, the bead 50 is formed in a range of the vehicle upper side from the rocker 16 and the vehicle lower side 52 at a position corresponding to the inside of the rear wheel house 14 in the rear side member 18 in the vehicle side view. Two beads 50 having the same shape are formed on the vehicle rear side and the vehicle upper side of the rocker outer rear panel 38, and each bead 50 is spaced apart in the vehicle front-rear direction and arranged parallel to each other. Has been.

  Next, the operation and effect of this embodiment will be described.

  In the present embodiment, when a load is input from the tire in the rear wheel house 14 while the vehicle 10 is traveling, the rear wheel house 14 tends to be displaced so as to be twisted around the joint with the rocker 16. In general, the rear wheel house 14 mainly receives a load along the vehicle vertical direction and the vehicle width direction, which is the movable range of the suspension holding the tire, so that the rear wheel house outer panel 24 and the rocker 16 are coupled. It is displaced along the vehicle vertical direction and the vehicle width direction about the portion 46. That is, the torsional stress is concentrated on the connecting portion 46 between the rear wheel house outer panel 24 and the rocker 16. Here, as shown in FIG. 2, a bead 50 is formed at a joint portion 46 between the rear wheel house outer panel 24 and the rocker 16. The bead 50 is formed so as to include a range above the rocker 16 and above the vehicle and below the rear side member 18. Accordingly, the rigidity of the connecting portion 46 between the rear wheel house outer panel 24 and the rocker 16 is improved, including the relatively low rigidity between the rocker 16 and the rear side member 18. Further, since the bead 50 is formed with the vehicle vertical direction as the longitudinal direction, the rear wheel house along the vehicle vertical direction and the vehicle width direction about the connecting portion 46 between the rear wheel house outer panel 24 and the rocker 16. The displacement of the outer panel 24 can be further suppressed. Thereby, the displacement of the rear wheel house outer panel 24 and hence the rear wheel house 14 is suppressed. From these things, since the displacement of the contact part to the rear wheel house 14 of the suspension which supports a tire is also suppressed, steering stability can be improved.

  In the present embodiment, two beads 50 are formed on the rocker outer rear panel 38, but the present invention is not limited to this, and one or three or more may be formed.

  Further, the bead 50 is disposed such that the longitudinal direction is inclined toward the upper side of the vehicle as it goes to the rear side of the vehicle. However, the bead 50 is not limited to this. It may be arranged in the direction.

  Further, the bead 50 is formed in a range above the rocker 16 and below the vehicle from the vehicle lower side 52 at a position corresponding to the inside of the rear wheel house 14 in the rear side member 18 in a side view of the vehicle. As long as it includes a range from the vehicle lower side 52 of the rear side member 18 to the vehicle lower side 52 at a position corresponding to the rear wheel house 14 at the rear side member 18 in the vehicle side view, it is formed at other portions. Also good.

  Furthermore, the bead 50 is configured to be provided on the rocker outer rear panel 38, but is not limited thereto, and may be formed on the rear wheel house outer panel 24. It may be formed in both. Furthermore, the bead 50 may be formed on other parts other than the rocker outer rear panel 38 and the rear wheel house outer panel 24.

  Further, as a reference example, when the vehicle body is deformed by the input of a load from the tire, the beads 50 may be formed at positions corresponding to the corners of the opening edge of the rear door opening 48 where the load is relatively easy to concentrate. Good. Further, the beads 50 may be formed not only at the opening edge of the rear door opening 48 but also at the positions corresponding to the corners of the opening edge of the front door opening 54 (see FIG. 1).

  The embodiment of the present invention has been described above, but the present invention is not limited to the above, and various modifications other than those described above can be implemented without departing from the spirit of the present invention. Of course.

10 Vehicle 14 Rear wheel house 16 Rocker 18 Rear side member 24 Rear wheel house outer panel 46 Joint 50 Bead

Claims (1)

A rear wheel house outer panel constituting an outer portion in the vehicle width direction of a rear wheel house arranged in a pair of left and right on the vehicle rear side in the vehicle;
A pair of left and right rear side members disposed on the inner side in the vehicle width direction with respect to the rear wheel house outer panel and extending along the vehicle longitudinal direction;
A pair of left and right rockers that are disposed on the vehicle lower side from the rear side member, the vehicle rear side is coupled to the vehicle front side of the rear wheel house outer panel, and extends along the vehicle front-rear direction;
A connecting portion between the rear wheel house outer panel and the rocker is disposed so as to include a range above the rocker and below the vehicle from the rocker when viewed from the side of the vehicle, and is formed with the vehicle vertical direction as a longitudinal direction. With beads,
A vehicle lower structure having:

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