JP2016097878A - Vehicle side structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a vehicle side structure which can suppress the deformation of a connecting part between a center pillar inner and a center pillar outer at a side face collision, in a constitution in which a high-tensile steel plate is used in a center pillar.SOLUTION: A vehicle side structure 20 has a locker 22, a center pillar 28, and an inner gusset 40. The locker 22 extends to a vehicle fore-and-aft direction. The center pillar 28 has a pillar outer 32 having first flanges 32F, 32G, and connected to the locker 22, and a pillar inner 34 arranged inside the pillar outer 32 in a vehicle width direction, and having second flanges 34F, 34G connected to the first flanges 32F, 32G. At least either of the pillar inner 34 and the pillar outer 32 is composed of a high-tensile steel plate. The inner gusset 40 is overlapped on connecting parts 42, 44 at the inside of the vehicle width direction rather than the pillar inner 34, and reinforces the connecting parts 42, 44.SELECTED DRAWING: Figure 8

Description

  The present invention relates to a vehicle side part structure.

  Patent Document 1 discloses a vehicle side part structure in which a gusset is installed between a center pillar and a gusset base provided on an upper surface of a floor panel. In Patent Document 1, no material is disclosed for the center pillar inner and the center pillar outer constituting the center pillar.

JP 2007-190992 A

  In the prior art described above, it is conceivable that at least one of the center pillar inner and the center pillar outer is made of a high-strength steel plate.

  However, when at least one of the center pillar inner and the center pillar outer is formed of a high-strength steel plate, the deformation at the coupling portion starts before the deformation of the base material at the time of a side collision. In addition, a high strength steel sheet has a characteristic that a structural modification of the bonding site occurs due to an increase in the temperature of the bonding site during spot welding, and it tends to be more brittle than a normal steel plate. For this reason, when at least one of the center pillar inner and the center pillar outer is made of a high-strength steel plate, the amount of deformation at the joint between the center pillar inner and the center pillar outer is reduced due to an input load to the center pillar at the time of a side collision. It can grow. Therefore, there is room for improvement in suppressing deformation at the joint between the center pillar inner and the center pillar outer.

  In view of the above facts, the present invention takes into account the above facts, and in a configuration in which a high-strength steel plate is used for the center pillar, a vehicle side part structure that can suppress deformation at the joint between the center pillar inner and the center pillar outer at the time of a side collision. Is the purpose.

  The vehicle side part structure according to the first aspect of the present invention includes a rocker that extends in the vehicle front-rear direction, and a center that is coupled to the rocker and includes first flanges that project to the front and rear sides of the vehicle front-rear direction. A pillar outer, and a center pillar inner provided with a second flange that is disposed on the vehicle width direction inner side of the center pillar outer and that protrudes forward and rearward in the vehicle front-rear direction and is coupled to the first flange. A center pillar made of a high-strength steel plate having a tensile strength higher than that of a normal steel plate and at least one of the center pillar inner and the center pillar outer, and the first flange on the inner side in the vehicle width direction than the center pillar inner And a reinforcing member arranged to overlap the connecting portion between the second flange and the second flange.

  In the vehicle side part structure according to the first aspect of the present invention, a high strength steel plate is used for the center pillar, and the first flange of the center pillar outer and the second flange of the center pillar inner are coupled. Furthermore, the connection part of a 1st flange and a 2nd flange is reinforced by arrange | positioning a reinforcement member on the connection part of a 1st flange and a 2nd flange, and is reinforced. Thereby, since the movement in the peeling direction of the first flange is suppressed, it is possible to suppress the deformation at the coupling portion between the center pillar inner and the center pillar outer at the time of a side collision.

  As described above, according to the vehicle side part structure of the first aspect, in the configuration in which the high-strength steel plate is used for the center pillar, at the joint portion between the center pillar inner and the center pillar outer at the time of a side collision. It has the outstanding effect that a deformation | transformation can be suppressed.

It is a perspective view which shows the center pillar periphery part of the vehicle to which the vehicle side part structure which concerns on this embodiment was applied. It is a disassembled perspective view of the vehicle side part structure which concerns on this embodiment. FIG. 3 is an enlarged longitudinal sectional view (3-3 sectional view of FIG. 1) of the vehicle side part structure according to the present embodiment as viewed from the front of the vehicle in the vehicle front-rear direction. It is a perspective view of a center pillar outer reinforcement and a rocker outer panel according to the present embodiment. It is a perspective view of a center pillar inner reinforcement and a rocker inner panel according to the present embodiment. It is a perspective view of the shear plate which concerns on this embodiment. It is a perspective view of the inner Naga set concerning this embodiment. (A) It is explanatory drawing (8A-8A sectional drawing of FIG. 1) which shows the state which a shear force acts on each part of the vehicle side part structure when a collision load is input into the center pillar which concerns on this embodiment. (B) It is explanatory drawing (8B-8B sectional drawing of FIG. 1) which shows the state which a shear force acts on each part of the vehicle side part structure when a collision load is input into the center pillar which concerns on this embodiment.

  Hereinafter, with reference to FIGS. 1-8, an example of embodiment of the vehicle side part structure which concerns on this invention is demonstrated. In addition, the arrow FR shown appropriately in each figure indicates the front of the vehicle (traveling direction), the arrow UP indicates the upper side of the vehicle, and the arrow OUT indicates the outer side in the vehicle width direction. Hereinafter, when simply using the front-rear, up-down, left-right directions, unless otherwise specified, the front-rear direction of the vehicle, the up-down direction of the vehicle, the left-right direction of the vehicle width when facing the traveling direction are shown. Shall. Moreover, the x mark in a figure means the spot-welded location.

[Vehicle side structure]
FIG. 1 shows a part of the left side portion of the vehicle 10. The vehicle 10 has roof side rails 12 that extend in the vehicle front-rear direction at both ends in the vehicle width direction and at the upper end in the vehicle vertical direction. Further, the vehicle 10 has a vehicle side part structure 20. As an example, the vehicle side part structure 20 constitutes a part of the vehicle longitudinal direction center part of the vehicle 10 and both ends of the vehicle width direction. In addition, since the vehicle 10 and the vehicle side part structure 20 are basically configured symmetrically, in the present embodiment, illustration of the right side structure of the vehicle 10 is omitted and description of the right side structure is omitted.

  The vehicle side structure 20 includes a rocker 22 that extends in the vehicle longitudinal direction, a center pillar 28 that extends in the vehicle vertical direction, and an inner set 40 that is disposed on the inner side of the center pillar 28 in the vehicle width direction. have. The inner set 40 is an example of a reinforcing member. Further, the vehicle side part structure 20 has a shear plate 36 provided on the rocker 22.

<Rocker>
As shown in FIG. 1, the rocker 22 extends in the vehicle front-rear direction at the lower part of the vehicle body side portion of the vehicle 10. As shown in FIG. 2, the rocker 22 includes a rocker outer panel 24 and a rocker inner panel 26 disposed on the inside of the rocker outer panel 24 in the vehicle width direction.

(Rocker outer panel)
As shown in FIG. 4, the rocker outer panel 24 is formed in a hat shape in which a cross-sectional shape viewed in the vehicle front-rear direction is opened inward in the vehicle width direction. Specifically, the rocker outer panel 24 includes a main body portion 24A having a U-shaped cross section that opens inward in the vehicle width direction, an upper flange 24B that protrudes upward from an upper end in the vehicle vertical direction of the main body portion 24A, and a main body portion. A lower flange 24C projecting downward from the lower end of 24A.

(Rocker Inner Panel)
As shown in FIG. 5, the rocker inner panel 26 is formed in a hat shape in which a cross-sectional shape viewed in the vehicle front-rear direction is opened outward in the vehicle width direction. Specifically, the rocker inner panel 26 includes a main body portion 26A having a U-shaped cross section that opens outward in the vehicle width direction, an upper flange 26B that protrudes upward from an upper end in the vehicle vertical direction of the main body portion 26A, A lower flange 26C projecting downward from the lower end of the portion 26A.

  As shown in FIG. 3, the upper flange 24B of the rocker outer panel 24 and the upper flange 26B of the rocker inner panel 26 are arranged in the vehicle width direction via a vehicle vertical direction upper portion (upper coupling portion 36C) of a shear plate 36 described later. They are joined by welding. Similarly, the lower flange 24C and the lower flange 26C are coupled by welding in the vehicle width direction via the lower end portion (lower coupling portion 36D) of the shear plate 36. Thereby, the rocker outer panel 24 and the rocker inner panel 26 form a polygonal closed cross section when viewed in the vehicle front-rear direction. In FIG. 3, each member that is displaced in the vehicle front-rear direction is indicated by a two-dot chain line (virtual line).

<Center pillar>
As shown in FIG. 1, the center pillar 28 has a lower end in the vehicle vertical direction coupled to the rocker 22 by welding, and extends from the center in the vehicle longitudinal direction of the rocker 22 toward the upper side in the vehicle vertical direction. In addition, the center portion of the roof side rail 12 in the vehicle front-rear direction is joined to the upper end portion of the center pillar 28 by welding. Further, a side outer panel (not shown) that constitutes an outer plate of the side of the vehicle body is provided on the outer side of the passenger compartment of the center pillar 28.

  As shown in FIG. 2, the center pillar 28 includes a center pillar outer reinforcement 32 disposed on the outer side in the vehicle width direction, and a center pillar inner reinforcement 34 disposed on the inner side in the vehicle width direction. Yes. The center pillar outer reinforcement 32 is an example of a center pillar outer. The center pillar inner reinforcement 34 is an example of a center pillar inner. In the following description, the center pillar outer reinforcement 32 is referred to as a pillar outer 32, and the center pillar inner reinforcement 34 is referred to as a pillar inner 34.

(Pillar Outer)
The pillar outer 32 shown in FIG. 4 is formed by pressing a high-strength steel sheet (High Tensile Strength Steel Sheets), and a hat whose cross-sectional shape viewed in the vehicle vertical direction opens inward in the vehicle width direction. It is formed in a shape. The “high strength steel plate” means a steel plate having a higher tensile strength than a normal steel plate, and mainly refers to a high strength steel plate having a tensile strength of 440 MPa or more and 790 MPa or less, but the tensile strength is 980 MPa or more. It does not exclude certain ultra-high strength steel sheets. As an example, the pillar outer 32 has a higher tensile strength than a pillar inner 34 (see FIG. 5) described later. Further, the pillar outer 32 is longer in the vehicle vertical direction than the pillar inner 34.

  The pillar outer 32 includes a main body portion 32A extending in the vehicle vertical direction, a mounting portion 32B extending in the vehicle front-rear direction at the vehicle vertical direction upper end portion of the main body portion 32A, a vehicle front-rear direction front side at the lower end portion of the main body portion 32A, and And a widened portion 32C widened to the rear side. In addition, as an example, the vehicle body front and rear direction lower part of the main body part 32A is wider than the upper part in the width dimension in the vehicle front-rear direction. The widened portion 32C is a portion that is further widened in the vehicle front-rear direction than the lower end portion of the main body portion 32A.

  A flange 32D that protrudes forward in the vehicle front-rear direction and a flange 32E that protrudes rearward in the vehicle front-rear direction are formed at the front end and rear end of the main body 32A in the vehicle front-rear direction. The widened portion 32C is formed with a first flange 32F protruding to the front side in the vehicle front-rear direction and a first flange 32G protruding to the rear side in the vehicle front-rear direction.

(Pillar inner)
The pillar inner 34 shown in FIG. 5 is formed by pressing the above-described high-strength steel plate, and the cross-sectional shape seen in the vehicle vertical direction is formed in a hat shape that opens outward in the vehicle width direction.

  The pillar inner 34 includes a main body portion 34A extending in the vehicle vertical direction, a mounting portion 34B extending in the vehicle front-rear direction at the vehicle vertical direction upper end portion of the main body portion 34A, and a vehicle front-rear direction at the lower end portion of the main body portion 34A. And a widened portion 34C widened to the front side and the rear side. In addition, as an example, the vehicle body longitudinal direction has a lower part in the vehicle vertical direction that is wider than the upper part of the main body 34A. The widened portion 34C is a portion that is further widened in the vehicle front-rear direction than the lower end portion of the main body portion 34A.

  A flange 34D protruding to the front side in the vehicle front-rear direction and a flange 34E protruding to the rear side in the vehicle front-rear direction are formed at the front end and rear end in the vehicle front-rear direction of the main body 34A. Further, the widened portion 34C is formed with a second flange 34F projecting forward in the vehicle front-rear direction and a second flange 34G projecting rearward in the vehicle front-rear direction. An opening 34H for a seat belt retractor (not shown) is formed in an inverted U shape at the lower end of the main body 34A in the vehicle vertical direction.

  As shown in FIG. 8B, the first flange 32F, the second flange 34F, and the front flange 40F of the inner gusset 40 described later are joined by welding to form a coupling portion 42B. Further, the first flange 32G, the second flange 34G, and a rear flange 40H of the inner flange set 40 described later are joined by welding to form a joint portion 44B. Further, the flange 32D and the flange 34D shown in FIGS. 4 and 5 are coupled by welding, and the flange 32E and the flange 34E are coupled by welding. In other words, the inner gusset 40 is disposed and coupled to the coupling portions 42B and 44B in the vehicle width direction on the inner side in the vehicle width direction with respect to the pillar inner 34, and reinforces the coupling portions 42B and 44B.

<Share plate>
The shear plate 36 shown in FIG. 6 is formed by pressing a steel plate material, and includes a main body portion 36A, an attachment portion 36B, an upper coupling portion 36C, and a lower coupling portion 36D.

  As an example, the main body 36A is formed in a rectangular shape with the longitudinal direction of the vehicle as viewed in the vehicle width direction. Further, the main body portion 36A is inclined outward in the vehicle width direction toward the upper side of the vehicle when viewed in the vehicle front-rear direction. Further, a through hole 36E that penetrates in the vehicle width direction is formed in the main body portion 36A.

  The attachment portion 36B extends outward from the front and rear end portions of the main body portion 36A in the vehicle front-rear direction. Further, the attachment portion 36B is connected to the inside of the rocker outer panel 24 (see FIG. 3) in the vehicle width direction by welding.

  The upper coupling portion 36C is a plate-like portion extending upward from the upper end portion of the main body portion 36A in the vehicle vertical direction. Further, the upper coupling portion 36C is formed in a substantially M shape in which the front end portion and the rear end portion in the vehicle front-rear direction extend upward from the center portion when viewed in the vehicle width direction.

  The lower coupling portion 36D is a plate-like portion that extends downward from the vehicle vertical direction lower end portion of the main body portion 36A along the vehicle vertical direction. Further, the lower coupling portion 36D is formed in a substantially rectangular shape having the longitudinal direction in the vehicle front-rear direction when viewed in the vehicle width direction.

  As shown in FIG. 3, the upper coupling portion 36C is coupled to the upper flange 24B of the rocker outer panel 24 and the upper flange 26B of the rocker inner panel 26 by welding. The lower coupling portion 36D is coupled to the lower flange 24C of the rocker outer panel 24 and the lower flange 26C of the rocker inner panel 26 by welding.

<Inaga set>
The inner gusset 40 shown in FIG. 7 is formed by pressing a steel plate material, and a cross-sectional shape viewed in the vehicle vertical direction is formed in a hat shape that opens outward in the vehicle width direction. Further, the inner set 40 includes a base wall portion 40A formed along the vehicle vertical direction and the vehicle front-rear direction. The base wall portion 40A is formed such that the width dimension along the vehicle longitudinal direction is wider on the lower side than on the upper side in the vehicle vertical direction.

  A substantially U-shaped cutout 40B as viewed in the vehicle width direction is formed at a position corresponding to the above-described opening 34H (see FIG. 5) of the pillar inner 34 at the upper part in the vehicle vertical direction of the base wall 40A. . The inner edge portion of the cutout portion 40B is formed at a position on the outer side in the vehicle width direction from the surface of the base wall portion 40A, and a step portion 40C is formed between the surface of the base wall portion 40A and the inner edge portion of the cutout portion 40B. Is formed. From the inner edge of the notch 40B, a clamp 40D that holds a wire harness (not shown) projects toward the upper side of the vehicle.

  A front side wall portion 40E that is bent outward in the vehicle width direction is formed at the front end portion of the base wall portion 40A in the vehicle front-rear direction. Furthermore, a front flange 40F is formed at the outer end in the vehicle width direction of the front side wall portion 40E so as to protrude toward the front side in the vehicle front-rear direction and the upper side in the vehicle vertical direction. A rear side wall 40G that is bent outward in the vehicle width direction is formed at the rear end in the vehicle front-rear direction of the base wall 40A. Further, a rear flange 40H is formed at the outer end portion of the rear side wall portion 40G in the vehicle width direction so as to protrude toward the rear side in the vehicle front-rear direction and the upper side in the vehicle vertical direction.

  As shown in FIG. 8 (A), the front flange 40F of the inner set 40, the front end portion of the upper coupling portion 36C of the shear plate 36, and the first flange 32F of the pillar outer 32 are coupled by welding. 42A is formed. Further, the rear flange 40H of the inner set 40, the rear end portion of the upper coupling portion 36C of the shear plate 36, and the first flange 32G of the pillar outer 32 are coupled by welding to form a coupling portion 44A.

  As shown in FIG. 3, the upper end in the vehicle vertical direction of the inner gusset 40 is connected to the lower end in the vehicle vertical direction of the pillar inner 34 by welding. Further, the lower end portion of the inner set 40 in the vehicle vertical direction is joined to the inner side surface of the rocker inner panel 26 in the upper portion of the vehicle vertical direction by welding.

<Action and effect>
Next, the operation and effect of the vehicle side part structure 20 of the present embodiment will be described.

  In the vehicle side part structure 20 shown in FIG. 8 (B), as described above, the inner portions 40B are overlapped and joined to the coupling parts 42B and 44B in the vehicle width direction, thereby coupling parts 42B and 44B. Is reinforced.

  It is assumed that a load F due to the collision acts on the center pillar 28 from the outer side in the vehicle width direction toward the inner side during a side collision of the vehicle 10 (see FIG. 1). At this time, since the pillar outer 32 tends to be deformed in the vehicle front-rear direction so as to open a cross section, the coupling portions 42B, 44B have shear forces F1, F2 (indicated by broken arrows) along the vehicle front-rear direction (shear direction). ) Acts. The shear force F1 is a force toward the outside of the center pillar 28 in the vehicle longitudinal direction, and the shear force F2 is a force toward the inside of the center pillar 28 in the vehicle longitudinal direction.

  Here, since the coupling portions 42B and 44B are reinforced by the front flange 40F and the rear flange 40H of the inner gusset 40, the deformation of the coupling portions 42B and 44B inward in the vehicle width direction is suppressed. Furthermore, since the cross-sectional areas of the coupling portions 42B and 44B are increased compared to the configuration without the inner set 40, stress concentration on the coupling portions 42B and 44B is suppressed. As a result, separation of the first flanges 32F, 32G in the vehicle width direction (peeling direction) with respect to the second flanges 34F, 34G is suppressed. Deformation at the portions 42B and 44B can be suppressed.

  8A is also reinforced by the front flange 40F and the rear flange 40H of the inner set 40, so that the coupling portions 42A and 44A are deformed inward in the vehicle width direction. It is suppressed. Furthermore, since the cross-sectional area is increased as compared with the configuration without the inner set 40, stress concentration on the coupling portions 42A and 44A is suppressed. Thereby, since the peeling in the vehicle width direction (peeling direction) of the first flanges 32F and 32G with respect to the shear plate 36 is suppressed, even in the configuration using a high-strength steel plate for the center pillar 28, the coupling portion 42A at the time of a side collision The deformation at 44A can be suppressed.

  Further, as shown in FIG. 3, in the vehicle side part structure 20, when the pillar outer 32 tries to deform inward in the vehicle width direction at the time of a side collision, the rocker outer panel 24 is pulled upward in the vehicle vertical direction, and a tensile load is applied to each part. F3 (indicated by a dashed arrow) acts. Here, since the shear plate 36 is coupled to the upper flanges 24B and 26B and the lower flanges 24C and 26C, the tensile load F3 input to the coupling portion between the lower flange 24C and the lower flange 26C causes the shear plate 36 to Via the vehicle up-down direction. That is, since the tensile load F3 input to the joint portion between the lower flange 24C and the lower flange 26C is input to the joint portion in the shear direction having higher proof strength than the peel direction, not in the peel direction. Separation between 24C and the lower flange 26C can be suppressed.

  In addition, as shown in FIG. 8A, in the vehicle side part structure 20, since the shear plate 36 is coupled to the pillar outer 32 in the vehicle longitudinal direction, the load F input to the center pillar 28 is applied to the vehicle longitudinal direction. Can also be shared by the rocker 22.

  In addition, this invention is not limited to said embodiment.

  The vehicle side part structure 20 may be a structure that does not include the shear plate 36.

  Each of the pillar outer 32 and the pillar inner 34 is not limited to a configuration using a high-strength steel plate, but one may be a high-strength steel plate and the other may be a plain steel plate having lower tensile strength than the high-strength steel plate.

  The inner set 40 is not limited to being coupled by the coupling portions 42B and 44B, but is disposed so as to overlap in the vehicle width direction without being coupled at the coupling portions 42B and 44B, and in contact with the coupling portions 42B and 44B. It may be.

  As described above, the vehicle side part structure according to the embodiment and the modification of the present invention has been described. However, the embodiment and the modification may be appropriately combined and used without departing from the gist of the present invention. Of course, it can be implemented in any manner.

10 Vehicle 22 Rocker 28 Center pillar 32 Center pillar outer reinforcement (an example of a center pillar outer)
32F 1st flange 32G 1st flange 34 Center pillar inner reinforcement (an example of a center pillar inner)
34F 2nd flange 34G 2nd flange 40 Inner set (an example of a reinforcing member)
42B coupling portion 44B coupling portion

Claims (1)

A rocker extending in the longitudinal direction of the vehicle,
A center pillar outer provided with a first flange projecting forward and rearward in the vehicle front-rear direction and coupled to the rocker, and disposed on the inner side in the vehicle width direction of the center pillar outer and stretched forward and rearward in the vehicle front-rear direction And a center pillar inner provided with a second flange connected to the first flange, and at least one of the center pillar inner and the center pillar outer has a higher tensile strength than a normal steel plate. A center pillar made of high-strength steel sheet,
A reinforcing member that is disposed to overlap the coupling portion between the first flange and the second flange on the inner side in the vehicle width direction than the center pillar inner and reinforces the coupling portion;
A vehicle side part structure.

Images