JP2009173110A - Vehicle body side part structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance strength and rigidity of a rocker while suppressing increase of mass. <P>SOLUTION: The vehicle body side part structure has the rocker 16 made to a closed cross section structure by bonding an outer panel 10 formed to a cross section of hat shape becoming projected to an outer side in a vehicle width direction and an inner panel 12 formed to a cross section of hat shape becoming projected to an inner side in the vehicle width direction at the joint part of an upper side of the vehicle and a lower side of the vehicle respectively, and extendingly provided in a vehicle longitudinal direction at a side part of a vehicle body. The inner panel 12 is constituted such that at least one of a corner part 12A of an upper side of the vehicle and a corner part 12B of a lower side of the vehicle at an inner side in the vehicle width direction is made to a thick plate part 12T having thicker plate thickness than a general part 12G of the inner panel 12 and the thick plate part 12T and the general part 12G are bonded with thick difference. Therefore, bending deformation of the rocker 16 at front surface collision of the vehicle and surface outer side deformation of the rocker 16 at side surface collision of the vehicle can be suppressed. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle body side structure.

As a vehicle body side structure, a structure is disclosed in which an L-shaped reinforcement is provided at a corner on the inner side in the vehicle width direction of the rocker to increase the rigidity of the rocker against bending compression (see Patent Document 1).
JP 2007-203893 A JP 2000-85633 A JP 2000-85620 A Japanese Utility Model Publication No. 62-28666

  However, in the above-described conventional example, the L-shaped reinforcement is formed so as to extend along the ceiling surface from the upper region of the inner wall surface of the rocker, and does not reach the flange-like joint at the upper portion of the rocker. Although the ridge line formed at the boundary between the ceiling surface and the ceiling surface is reinforced, the ridge line formed at the boundary between the ceiling surface and the joint is not reinforced. If it is intended to increase the rigidity of the rocker in such a structure, it is difficult to suppress an increase in mass because it is necessary to increase the thickness and size of the reinforcement.

  In view of the above fact, an object of the present invention is to increase the strength and rigidity of a rocker while suppressing an increase in mass.

  According to the first aspect of the present invention, an outer panel formed in a cross-sectional hat shape that protrudes outward in the vehicle width direction and an inner panel formed in a cross-sectional hat shape that protrudes inward in the vehicle width direction are provided on the vehicle upper side and the vehicle lower side. Each of the mating portions is coupled to form a closed cross-sectional structure, and has a rocker extending in the vehicle front-rear direction at the vehicle body side portion, and the inner panel includes a corner portion on the vehicle upper side and a vehicle lower side on the vehicle width direction inner side. At least one of the corner portions is a thick plate portion having a thickness greater than that of the general portion of the inner panel, and the thick plate portion and the general portion are connected by differential thickness.

  In the vehicle body side part structure according to the first aspect, since the rocker inner panel is formed by connecting the thick plate portion and the general portion with a different thickness, the strength and rigidity of the rocker are improved. For this reason, the bending deformation of the rocker at the time of a frontal collision of the vehicle and the out-of-plane deformation of the rocker at the time of a side collision of the vehicle can be suppressed. That is, in the vehicle body side part structure according to claim 1, it is possible to increase the strength and rigidity of the rocker while suppressing an increase in mass compared to the case where the corner of the rocker is reinforced with L-shaped reinforcement. it can.

  According to a second aspect of the present invention, in the vehicle body side part structure according to the first aspect, the thick plate portion is formed in a portion including the corresponding corner portion to the mating portion on the corner portion side. It is a feature.

  In the vehicle body side part structure according to claim 2, since the thick plate part is formed in a part including the corresponding corner part to the mating part on the corner side, the inner side in the vehicle width direction of the inner panel of the rocker. Not only the corner ridgeline but also the strength and rigidity of the mating ridgeline are improved. By utilizing the strength and rigidity of each ridgeline at the corner and the mating portion, it is possible to further suppress the deformation of the rocker at the time of a vehicle collision.

  As described above, according to the vehicle body side part structure according to claim 1 of the present invention, it is possible to obtain an excellent effect that the strength and rigidity of the rocker can be increased while suppressing an increase in mass. .

  According to the vehicle body side part structure of the second aspect, it is possible to obtain an excellent effect that deformation of the rocker at the time of a vehicle collision can be further suppressed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 and 2, the vehicle body side part structure S according to the present embodiment has an outer panel 10 formed in a cross-sectional hat shape that protrudes outward in the vehicle width direction and a cross-sectional hat shape that protrudes inward in the vehicle width direction. The formed inner panel 12 is connected to the upper and lower mating portions 14 and 15 of the vehicle to form a substantially rectangular closed cross-sectional structure, for example, and a rocker 16 extending in the vehicle front-rear direction at the vehicle body side portion. Have. For the outer panel 10 and the inner panel 12, for example, high-tensile steel plates are used.

  As shown in FIG. 2, a side member outer panel 18 is provided outside the rocker 16 in the vehicle width direction. Similar to the outer panel 10, the side member outer panel 18 is formed in a substantially cross-sectional hat shape that protrudes outward in the vehicle width direction, and the upper and lower mating portions 14, so as to cover the outer panel 10 from the outer side in the vehicle width direction. 15 and joined. Since the mating portions 14 and 15 are joined by three pieces in which the three members are joined together, joining is easier than the case of joining four pieces by adding a reinforcement (not shown) or the like. is there.

  As shown in FIG. 1, the lower part of the A pillar 20 is joined to the front end of the rocker 16, and the lower part of the B pillar 22 is joined to the center part of the rocker 16 in the vehicle longitudinal direction. The rear end of the rocker 16 is coupled to the rear wheel house 26 via a coupling panel 24, for example. In addition, a floor panel 28 is provided between the left and right rockers 16 (the rocker on the right side of the vehicle is not shown). A tunnel portion 28A extending in the vehicle front-rear direction is provided at the center of the floor panel 28 in the vehicle width direction. It is formed in a convex shape.

  Between the rocker 16 and the tunnel portion 28A at the lower position of the B pillar 24, a floor cross member 30 is disposed in the vehicle width direction. A floor cross member 32 is also arranged in the vehicle width direction between the rocker 16 and the tunnel portion 28 </ b> A between the A pillar 20 and the B pillar 22. The floor cross member 32 is, for example, a portion that becomes a fixing portion of a front seat (not shown). Further, a floor cross member 34 is also arranged in the vehicle width direction between the left and right rockers 16 at the rear of the vehicle from the B pillar 22. The floor cross member 34 is a part that becomes a fixing portion of a rear seat (not shown), for example. The arrangement positions of the floor cross members 30, 32, and 34 are not limited to these positions.

  In FIG. 2, the inner panel 12 of the rocker 16 has a vehicle upper corner 12 </ b> A of the vehicle upper corner 12 </ b> A and the vehicle lower corner 12 </ b> B on the inner side in the vehicle width direction than the general portion 12 </ b> G of the inner panel 12. The thick plate portion 12T has a thick plate thickness, and the thick plate portion 12T and the general portion 12G are connected to each other by a thickness difference at a coupling portion 12D. This coupling | bond part 12D is located in the side wall part 12C of the inner panel 12, for example.

  The thick plate portion 12T is formed at a portion including the corner portion 12A on the vehicle upper side to the mating portion 14 on the vehicle upper side. For example, the entire portion of the inner panel 12 on the vehicle upper side from the coupling portion 12D is a thick plate portion. It is 12T. A portion of the inner panel 12 on the vehicle upper side from the coupling portion 12D includes an upper portion of the side wall portion 12C, an upper wall portion 12S, and a mating portion 14. In FIG. The ridgeline 12E and the ridgeline 12F of the mating portion 14 are also included in the thick plate portion 12T.

  As shown in FIG. 4, the thick plate portion 12T and the general portion 12G constituting the inner panel 12 are separately manufactured by press molding before the differential thickness bonding. Since the plate thickness of the thick plate portion 12T and the upper wall portion 12S is, for example, constant, the formability is good even if the material is a high-tensile steel plate. As shown in FIG. 3, the inner panel 12 includes, for example, laser beam welding of the thick plate portion 12 </ b> T and the general portion 12 </ b> G, for example, at a connecting portion 12 </ b> D along the vehicle longitudinal direction (longitudinal direction of the inner panel 12). Thus, a difference thickness combination is used. In other words, the inner panel 12 is configured by connecting the thick plate portion 12T and the general portion 12G with a thickness difference in the vehicle vertical direction perpendicular to the longitudinal direction of the inner panel 12.

  Since the thickness of the inner panel 12 changes with the connecting portion 12D as a boundary, the inner panel 12 has a stepped shape on the inner side surface in the vehicle width direction, but the outer side surface in the vehicle width direction (within the closed cross section of the rocker 16). ) Is not a step. This is to increase the antirust property in the rocker 16.

  In the rocker 16, the plate thickness of the general portion 12 </ b> G of the inner panel 12 is set to be equal to the plate thickness of the outer panel 10. The plate thickness of the thick plate portion 12T is arbitrarily determined in consideration of the strength and rigidity of the rocker 16, but in the illustrated example, it is set to be approximately twice the plate thickness of the general portion 12G. Moreover, about the thick plate part 12T, you may provide over the full length of the longitudinal direction of the inner panel 12, and you may provide locally.

(Function)
This embodiment is configured as described above, and the operation thereof will be described below. In FIG. 2, in the vehicle body side structure S according to the present embodiment, the inner panel 12 of the rocker 16 is configured by connecting the thick plate portion 12 </ b> T on the vehicle upper side and the general portion 12 </ b> G on the vehicle lower side with a differential thickness. Therefore, the strength and rigidity of the rocker 16 are improved. For this reason, it is possible to suppress bending deformation of the rocker 16 that protrudes above the vehicle at the time of a frontal collision of the vehicle and out-of-plane deformation of the rocker 16 at the time of a side collision of the vehicle. That is, in the vehicle body side structure S, the strength of the rocker 16 is suppressed while suppressing an increase in mass compared to the case where the corner 12A on the vehicle upper side of the rocker 16 is reinforced with an L-shaped reinforcement as in the past.・ The rigidity can be increased.

  In particular, in the vehicle body side structure S, as shown in FIG. 3, the thick plate portion 12T is formed in a part including the corner portion 12A on the vehicle upper side to the mating portion 14 on the corner portion 12A side. Not only the ridgeline 12E of the corner 12A on the vehicle upper side in the inner panel 12 of the rocker 16, but also the strength and rigidity of the ridgeline 12F of the mating portion 14 are improved. By utilizing the strength and rigidity of the ridgeline 12E and ridgeline 12F, the deformation of the rocker 16 at the time of a vehicle collision can be further suppressed.

(Modification 1)
The inner panel 12 in the rocker 16 may be configured as shown in FIGS. In the vehicle body side structure S shown in FIG. 5, among the vehicle upper corner 12A and the vehicle lower corner 12B on the inner side in the vehicle width direction, the vehicle lower corner 12B is the general portion 12G of the inner panel 12. The thick plate portion 12T is thicker than the thick plate portion 12T, and the thick plate portion 12T and the general portion 12G are connected to each other at the connecting portion 12D. The thick plate portion 12T is formed in a portion including the corner portion 12B on the vehicle lower side to the mating portion 15 on the vehicle lower side. For example, the entire portion of the inner panel 12 below the vehicle from the coupling portion 12D is formed. It is a thick plate portion 12T. The inner panel 12 includes a lower portion of the side wall portion 12C, a lower wall portion 12H, and a mating portion 15 at a portion below the coupling portion 12D in the vehicle, and a ridge line of the corner portion 12B on the lower side of the vehicle. 12J and the ridgeline 12K of the mating portion 15 are also included in the thick plate portion 12T.

  In the vehicle body side structure S, it is possible to suppress bending deformation of the rocker 16 protruding downward in the vehicle at the time of a frontal collision of the vehicle and out-of-plane deformation of the rocker 16 at the time of a vehicle side collision. In S, the strength and rigidity of the rocker 16 can be increased while suppressing an increase in mass, as compared with a case where the corner 12B on the vehicle lower side of the rocker 16 is reinforced with an L-shaped reinforcement.

  In particular, in the vehicle body side structure S, the thick plate portion 12T is formed in a portion including the corner portion 12B on the vehicle lower side to the mating portion 15 on the corner portion 12B side. In addition to the ridgeline 12J of the corner 12B on the vehicle lower side, the strength and rigidity of the ridgeline 12K of the mating portion 15 are also improved. By utilizing the strength and rigidity of these ridgelines 12J and 12K, respectively, deformation of the rocker 16 at the time of a vehicle collision can be further suppressed.

  In FIG. 5, the position of the coupling portion 12 </ b> D is not limited to the illustrated position. For example, the coupling portion 12 </ b> D may be provided at the center of the inner panel 12 in the vehicle vertical direction.

(Modification 2)
In the vehicle body side structure S shown in FIG. 6, both the corner 12A on the upper side of the vehicle and the corner 12B on the lower side of the vehicle are thick plate portions 12T, and the thick plate portion 12T and the general portion 12G are connected to the coupling portion 12D. , 12L are formed by differential thickness coupling. The thick plate portion 12T is formed in a portion including the corner portion 12A on the upper side of the vehicle to the mating portion 14 on the upper side of the vehicle and a portion including the corner portion 12B on the lower side of the vehicle and the mating portion 15 on the lower side of the vehicle. ing. That is, the entire upper panel portion of the inner panel 12 from the coupling portion 12D and the entire lower portion of the vehicle from the coupling portion 12L form the thick plate portion 12T.

  Of the inner panel 12, the upper part of the side wall part 12C, the upper wall part 12S, and the mating part 14 are included in the part on the vehicle upper side from the coupling part 12D, and the ridge line 12E of the corner part 12A on the vehicle upper side and The ridge line 12F of the mating portion 14 is also included in the thick plate portion 12T. Further, a portion of the inner panel 12 on the vehicle lower side from the coupling portion 12L includes a lower portion of the side wall portion 12C, a lower wall portion 12H, and a mating portion 15, and a ridge line of the corner portion 12B on the vehicle lower side. 12J and the ridgeline 12K of the mating portion 15 are also included in the thick plate portion 12T. The general portion 12G is disposed between the upper and lower thick plate portions 12T and constitutes a part of the side wall portion 12C of the inner panel 12.

  In the vehicle body side structure S, bending deformation of the rocker 16 at the time of frontal collision of the vehicle and out-of-plane deformation of the rocker 16 at the time of side collision of the vehicle can be suppressed. The strength and rigidity of the rocker 16 can be increased while suppressing an increase in mass compared to the case where the corners 12B on the vehicle lower side are reinforced with L-shaped reinforcements.

  In particular, in the vehicle body side structure S, the thick plate portion 12T is formed in a portion including the corner portion 12A on the vehicle upper side to the mating portion 14 on the corner portion 12A side, and from the corner portion 12B on the vehicle lower side. Since it is formed in a portion including the mating portion 15 on the corner 12B side, the strength and rigidity of the ridgelines 12E and 12F on the vehicle upper side and the ridgelines 12J and 12K on the vehicle lower side of the inner panel 12 of the rocker 16 are improved. is doing. By utilizing the strength and rigidity of these ridgelines 12E, 12F, 12J, and 12K, respectively, deformation of the rocker 16 at the time of a vehicle collision can be further suppressed.

  In FIG. 6, the positions of the coupling portions 12D and 12L are not limited to the illustrated positions.

It is a perspective view which shows a vehicle body side part structure. FIG. 2 is an enlarged sectional view taken along arrow 2-2 in FIG. It is a partial fracture expansion perspective view showing a body side part structure. It is an expansion disassembled perspective view of an inner panel. FIG. 6 is an enlarged cross-sectional view showing a modified example in which a vehicle lower side portion of the inner panel is a thick plate portion in the vehicle body side structure. FIG. 5 is an enlarged cross-sectional view showing a modified example in which a vehicle upper side portion and a vehicle lower side portion of an inner panel are thick plate portions and a general portion is between them in the vehicle body side portion structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Outer panel 12 Inner panel 12A Upper vehicle corner 12B Lower vehicle corner 12G General portion 12T Thick plate portion 14 Upper vehicle alignment portion 15 Lower vehicle alignment portion 16 Rocker S Body side structure

Claims (2)

An outer panel formed in a cross-sectional hat shape that protrudes outward in the vehicle width direction and an inner panel formed in a cross-sectional hat shape that protrudes inward in the vehicle width direction are joined to each other at the mating portion on the vehicle upper side and vehicle lower side, respectively. It has a closed cross-section structure and has a rocker extending in the vehicle front-rear direction on the side of the vehicle body,
In the inner panel, at least one of the vehicle upper corner and the vehicle lower corner on the inner side in the vehicle width direction is a thick plate portion thicker than the general portion of the inner panel, and the thick plate portion A vehicle body side portion structure characterized by being formed by differential thickness coupling with the general portion.   The vehicle body side part structure according to claim 1, wherein the thick plate portion is formed in a portion including the corresponding corner portion to the mating portion on the corner portion side.

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