JP2012240436A - Vehicle body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce weight and cost, and to secure rigidity of a joining part between a vehicle body skeleton and a pillar.SOLUTION: In this vehicle body structure 10, a division bar 16 is constituted of two parts of: a front pillar outer part 26 formed on a side outer panel 24; and a gusset inner 56. Thus, the weight and the cost can be reduced. A reinforcing structure 68 of a cross-sectional triangular shape in a longitudinal directional view of a front pillar 14 with joining parts 40, 60, and 64 of three places as joining points, is constituted of: a lower-side flange 30 formed in a lower part of a pillar inner upper 20; a lower wall 48 and a lower-side flange 36 formed in a lower part of a pillar outer reinforcement upper 22; an upper-side flange 58 and a joining object part 62, both being formed in an upper part of the gusset inner 56; and a connecting wall 70 provided between the upper-side flange 58 and the joining object part 62. Thus, rigidity of the joining part between the front pillar 14 and the division bar 16 can be secured.

Description

  The present invention relates to a vehicle body structure.

  Conventionally, a center pillar configured by a pillar inner panel, a pillar reinforcing panel, and a pillar outer panel formed on a rail outer panel constituting a roof side rail is known (for example, see Patent Document 1).

JP 2004-82885 A (FIG. 5)

  However, since the center pillar is composed of three parts, there is room for improvement in order to reduce weight and cost. Moreover, it is desired that the rigidity of the joint portion between the roof side rail and the center pillar can be ensured even when reducing the weight and cost.

  The present invention has been made in view of the above problems, and provides a vehicle body structure capable of reducing the weight and cost and ensuring the rigidity of the coupling portion between the vehicle body skeleton and the pillar. For the purpose.

  In order to solve the above-described problem, the vehicle body structure according to claim 1 includes a vehicle body skeleton inner which is provided on the vehicle upper side of a pillar extending in the vehicle vertical direction and forms a vehicle width direction inner side portion of the vehicle body skeleton extending in the vehicle front-rear direction. The outer reinforcement provided on the vehicle width direction outer side of the vehicle body skeleton inner, the lower part being coupled to the lower part of the vehicle body skeleton inner by the first coupling part, and the outer reinforcement provided on the outer side in the vehicle width direction of the outer reinforcement. A vehicle body skeleton outer portion constituting the vehicle width direction outer side portion of the vehicle body skeleton, and a pillar outer portion extending in the vehicle vertical direction and having an upper end connected to the vehicle body skeleton outer portion and constituting the vehicle width direction outer portion of the pillar. The pillar outer portion and the pillar outer portion provided on the inner side in the vehicle width direction of the pillar outer portion. And a third coupling portion that is coupled to the lower portion of the outer reinforcement by the second coupling portion on the outer side in the vehicle width direction than the first coupling portion and that is lower than the first coupling portion. A pillar inner member coupled to a lower portion of the vehicle body skeleton inner, a lower portion of the vehicle body skeleton inner, a lower portion of the outer reinforcement, and an upper portion of the pillar inner member, the first coupling portion and the second coupling And a reinforcing structure having a triangular cross section as viewed in the longitudinal direction of the vehicle body skeleton with the third coupling portion as a coupling point.

  According to this vehicle body structure, the pillar is constituted by the pillar outer portion formed on the side outer panel and the pillar inner member. Therefore, the pillar is composed of two parts, and the number of parts is smaller than in the conventional case, so that weight reduction and cost reduction can be achieved.

  Further, in the coupling portion between the vehicle body skeleton and the pillar, the first coupling portion, the second coupling portion, and the third coupling portion are formed by the lower portion of the vehicle body skeleton inner, the lower portion of the outer reinforcement, and the upper portion of the pillar inner member. A reinforcing structure having a triangular cross section as viewed in the longitudinal direction of the vehicle body skeleton inner having a coupling point as a connecting point is formed. Therefore, the rigidity of the joint portion between the vehicle body skeleton and the pillar can be ensured.

  The vehicle body structure according to claim 2 is the vehicle body structure according to claim 1, wherein the outer reinforcement has an upper portion connected to the upper portion of the vehicle body skeleton inner by a fourth coupling portion on the vehicle upper side than the first coupling portion. In addition to being coupled, the vehicle body skeleton inner forms a closed cross section, and the reinforcing structure shares the closed cross section and the lower portion of the outer reinforcement.

  According to this vehicle body structure, a closed cross section is constituted by the outer reinforcement and the vehicle body skeleton inner, and the closed cross section and the above-described reinforcing structure share the lower part of the outer reinforcement. Therefore, since the rigidity of the reinforcing structure is improved by the closed cross-section portion, the rigidity of the joint portion between the vehicle body skeleton and the pillar can be improved.

  As described above in detail, according to the vehicle body structure of the present invention, weight reduction and cost reduction can be achieved, and the rigidity of the coupling portion between the vehicle body skeleton and the pillar can be ensured.

1 is a side view showing a schematic configuration of a vehicle body to which a vehicle body structure according to an embodiment of the present invention is applied. FIG. 2 is a sectional view taken along line 2-2 of FIG. FIG. 2 is an enlarged perspective view of a front pillar and a division bar shown in FIG. 1. FIG. 4 is a sectional view taken along line 4-4 of FIG. It is a perspective view which shows the structure of the lower part periphery of the division bar shown by FIG. It is sectional drawing corresponding to FIG. 2 of the vehicle body structure which concerns on a 1st comparative example. It is sectional drawing corresponding to FIG. 4 of the vehicle body structure which concerns on a 1st comparative example. It is sectional drawing corresponding to FIG. 2 of the vehicle body structure which concerns on a 2nd comparative example. It is sectional drawing corresponding to FIG. 4 of the vehicle body structure which concerns on a 2nd comparative example.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In each figure, an arrow UP, an arrow FR, and an arrow OUT indicate the vehicle vertical direction upper side, the vehicle longitudinal direction front side, and the vehicle width direction outer side (right side).

  As shown in FIG. 1, a vehicle body 12 to which a vehicle body structure 10 according to an embodiment of the present invention is applied includes a front pillar 14 that is an example of a vehicle body skeleton in the present invention and a division that is an example of a pillar in the present invention. Bar 16.

  The front pillar 14 is provided on the vehicle upper side of the division bar 16 and extends in the vehicle front-rear direction. The front pillar 14 is inclined with respect to the vertical direction of the vehicle so as to go to the upper side of the vehicle as it goes to the rear side of the vehicle. The division bar 16 extends in the vehicle vertical direction, and constitutes a front edge portion of a door opening 18 that is opened and closed by a front door (not shown).

  As shown in FIG. 2, the front pillar 14 includes a pillar inner upper 20 that is an example of a vehicle body skeleton inner in the present invention, a pillar outer reinforcement upper 22 that is an example of outer reinforcement in the present invention, and a side outer panel 24. It is comprised by the front pillar outer part 26 formed in this.

  That is, the pillar inner upper 20 constitutes the vehicle width direction inner side portion of the front pillar 14. The pillar inner upper 20 is formed with an upper flange 28 that extends inward in the vehicle width direction at the upper part, and a lower flange 30 that extends downward in the vehicle at the lower part. The lower flange 30 extends in the longitudinal direction of the front pillar 14, and a joint portion 32 extending downward from the vehicle is formed at a position corresponding to the division bar 16 in the lower flange 30 (also in FIG. 3). reference).

  The pillar outer reinforcement upper 22 is provided on the outer side in the vehicle width direction of the pillar inner upper 20. The pillar outer reinforcement upper 22 is formed with an upper flange 34 extending inward in the vehicle width direction at the upper portion and a lower flange 36 extending downward with respect to the vehicle at the lower portion.

  The upper flange 34 is disposed between the upper flange 28 formed on the above-described pillar inner upper 20 and the upper flange 52 formed on the front pillar outer portion 26 of the side outer panel 24 described later. The flanges 28 and 52 are connected to each other by a connecting portion 38 by, for example, spot welding. The coupling portion 38 is an example of a fourth coupling portion in the present invention, and is located on the vehicle upper side than the coupling portion 40 described later.

  On the other hand, the lower flange 36 is coupled to the lower flange 30 formed in the above-described pillar inner upper 20 by a coupling portion 40 by, for example, spot welding. The coupling portion 40 is an example of a first coupling portion according to the present invention, and as shown in FIG. 3, the coupling portion 40 is formed at positions shifted to the vehicle front side and the vehicle rear side with respect to the coupling portions 60 and 64 described later. ing. In FIG. 3, the side outer panel 24 is not shown for easy understanding.

  In this way, the pillar inner upper 20 and the pillar outer reinforcement upper 22 are coupled to each other at the upper part and the lower part, whereby the pillar inner upper 20 and the pillar outer reinforcement upper 22 constitute a closed cross section 42. Has been.

  That is, as shown in FIG. 2, the closed cross-section portion 42 is formed on the upper flange 28 and the lower flange 30 of the pillar inner upper 20, the inner wall portion 44 therebetween, and the upper portion of the pillar outer reinforcement upper 22. The formed upper flange 34 and the upper wall portion 46, the lower flange 36 and the lower wall portion 48 formed in the lower part of the pillar outer reinforcement upper 22, and the outer wall portion that connects the upper wall portion 46 and the lower wall portion 48. 50. The closed cross-section portion 42 has a closed cross-sectional shape as viewed from the front pillar 14 in the longitudinal direction (viewed in the vehicle front-rear direction).

  The front pillar outer portion 26 is provided on the outer side in the vehicle width direction of the pillar outer reinforcement upper 22. The front pillar outer portion 26 is an example of a vehicle body skeleton outer portion in the present invention, and constitutes the vehicle width direction outer side portion of the front pillar 14. An upper flange 52 extending inward in the vehicle width direction is formed on the upper portion of the front pillar outer portion 26.

  The division bar 16 includes a division bar outer portion 54 formed on the side outer panel 24 and a gusset inner 56 (see also FIG. 4).

  The division bar outer portion 54 extends in the vehicle vertical direction, and an upper end portion thereof is connected to the front pillar outer portion 26. The division bar outer portion 54 is an example of a pillar outer portion in the present invention, and constitutes the vehicle width direction outer side portion of the division bar 16.

  The gusset inner 56 is provided inside the division bar outer portion 54 in the vehicle width direction. The gusset inner 56 is an example of a pillar inner member in the present invention, and constitutes the vehicle width direction inner side portion of the division bar 16.

  An upper flange 58 is formed on the upper portion of the gusset inner 56, and the upper flange 58 is connected to the lower wall portion 48 by a connecting portion 60 by, for example, spot welding. In addition, a joined portion 62 is formed on the gusset inner 56 so as to overlap the above-described joined portion 32. The joined portion 62 is welded to the joined portion 32, for example, one-side welding such as arc welding or laser welding. It is couple | bonded by the coupling | bond part 64 by.

  The coupling portion 64 is an example of a third coupling portion in the present invention, and is located on the vehicle lower side than the coupling portion 40 described above. Moreover, the above-described coupling portion 60 is an example of a second coupling portion in the present invention, and is located on the outer side in the vehicle width direction than the above-described coupling portion 40. Note that, as shown in FIG. 3, the joined portion 32 and the joined portion 62 are also joined by a joining portion 66 by, for example, spot welding.

  In this way, the pillar inner upper 20, the pillar outer reinforcement upper 22, and the gusset inner 56 are coupled by the three coupling portions 40, 60, and 64, as shown in FIG. The lower part of the pillar inner upper 20, the lower part of the pillar outer reinforcement upper 22, and the upper part of the gusset inner 56 constitute a reinforcing structure 68 (truss structure) having three coupling parts 40, 60, 64 as coupling points. Has been.

  That is, the reinforcing structure 68 includes a lower flange 30 formed at the lower portion of the pillar inner upper 20, a lower wall portion 48 and a lower flange 36 formed at the lower portion of the pillar outer reinforcement upper 22, and a gusset inner 56. The upper flange 58 and the to-be-joined portion 62 are formed on the upper portion of the upper portion of the rim, and the connecting wall portion 70 between the upper flange 58 and the to-be-joined portion 62 is configured. The reinforcing structure 68 has a triangular cross section when viewed from the longitudinal direction of the front pillar 14 (viewed in the vehicle longitudinal direction), and shares the closed cross section 42, the lower wall 48, and the lower flange 36 described above. Yes.

  The pillar inner upper 20, the pillar outer reinforcement upper 22, the side outer panel 24, and the gusset inner 56 are assembled, for example, in the following order.

  That is, first, the lower wall portion 48 of the pillar outer reinforcement upper 22 and the upper flange 58 of the gusset inner 56 are coupled by, for example, a coupling portion 60 by spot welding.

  Subsequently, in a state where the pillar inner upper 20, the pillar outer reinforcement upper 22, the side outer panel 24, and the gusset inner 56 are assembled to each other at regular positions, the joint portion 32 of the pillar inner upper 20 and the gusset inner 56 The joined portion 62 is joined by a joining portion 64 by one-side welding such as arc welding or laser welding. Further, at this time, the joining portion 32 and the joined portion 62 shown in FIG. 3 are also joined by a joining portion 66 by spot welding, for example.

  Further, in the same process, the upper flange 28 of the pillar inner upper 20, the upper flange 34 of the pillar outer reinforcement upper 22, and the upper flange 52 of the side outer panel 24 are joined together by, for example, a joint 38 by spot welding. Further, the lower flange 30 of the pillar inner upper 20 and the lower flange 36 of the pillar outer reinforcement upper 22 are coupled by a joint 40 by spot welding, for example.

  In the above manner, the pillar inner upper 20, the pillar outer reinforcement upper 22, the side outer panel 24, and the gusset inner 56 are assembled.

  As shown in FIG. 5, a joint portion 72 is formed at the lower portion of the gusset inner 56. The joint 72 is sandwiched between the pillar outer reinforcement lower 74 and the pillar inner lower 76, and is joined to the joint 78 by spot welding, for example, by one-side welding such as arc welding or laser welding. The parts 80 are connected.

  Next, the operation and effect of one embodiment of the present invention will be described.

  First, in order to clarify the operation and effect of the embodiment of the present invention, a comparative example will be described. In addition, in the comparative example shown below, about the member of the same name as one Embodiment of the above-mentioned this invention, the same code | symbol is used for the ease of a comparison.

  In the vehicle body structure 110 according to the first comparative example shown in FIGS. 6 and 7, the pillar outer reinforcement 112 is used instead of the pillar outer reinforcement upper 22 in the vehicle body structure 10 according to the embodiment of the present invention described above. Is used. The pillar outer reinforcement 112 extends in the vehicle vertical direction and constitutes a part of the division bar 16.

  That is, in the vehicle body structure 110 according to the first comparative example, the division bar 16 is configured by three parts including the pillar outer reinforcement 112, the division bar outer portion 54 of the side outer panel 24, and the gusset inner 56.

  However, in the vehicle body structure 110 according to the first comparative example, since the division bar 16 is composed of three parts as described above, there is room for improvement in order to reduce weight and cost.

  On the other hand, in the vehicle body structure 120 according to the second comparative example shown in FIGS. 8 and 9, the pillar outer reinforcement upper 22 is used as in the vehicle body structure 10 according to the embodiment of the present invention described above. The division bar 16 includes two parts, a division bar outer portion 54 of the side outer panel 24 and a gusset inner 56. Therefore, since the division bar 16 is composed of two parts, weight reduction and cost reduction can be achieved.

  However, since the upper part of the gusset inner 56 is connected only to the lower part of the pillar inner upper 20, there is a problem that the rigidity of the connecting part between the front pillar 14 and the division bar 16 is low. The rigidity of the joint between the front pillar 14 and the division bar 16 is very important because it affects the NV (noise vibration) performance.

  On the other hand, according to the vehicle body structure 10 according to the embodiment of the present invention, the division bar 16 is composed of two parts, that is, the division bar outer portion 54 formed on the side outer panel 24 and the gusset inner 56. Therefore, weight reduction and cost reduction can be achieved.

  Further, at the connecting portion between the front pillar 14 and the division bar 16, three connecting portions 40, 60 are formed by a lower portion of the pillar inner upper 20, a lower portion of the pillar outer reinforcement upper 22, and an upper portion of the gusset inner 56. , 64 as a connecting point, a reinforcing structure 68 having a triangular cross section is formed when viewed in the longitudinal direction of the front pillar 14 (viewed in the vehicle longitudinal direction). Therefore, the rigidity of the joint portion between the front pillar 14 and the division bar 16 can be ensured.

  Moreover, a closed section 42 is constituted by the pillar outer reinforcement upper 22 and the pillar inner upper 20, and the closed section 42 and the above-described reinforcing structure 68 are the lower wall section 48 of the pillar outer reinforcement upper 22. And the lower flange 36 are shared. Accordingly, since the rigidity of the reinforcing structure 68 is improved by the closed cross-section portion 42, the rigidity of the joint portion between the front pillar 14 and the division bar 16 can be improved.

  Next, a modification of one embodiment of the present invention will be described.

  In the above-described embodiment of the present invention, the vehicle body structure 10 is applied to the front pillar 14 and the division bar 16, but may be applied to the roof side rail 84 and the center pillar 86 shown in FIG.

  In this case, the roof side rail 84 corresponds to an example of a vehicle body skeleton in the present invention, and the center pillar 86 corresponds to an example of a pillar in the present invention. The sectional configurations of the roof side rail 84 and the center pillar 86 are the same as those of the front pillar 14 and the division bar 16 described above.

  Further, the vehicle body structure 10 according to an embodiment of the present invention may be applied to other vehicle body skeletons and pillars.

  Further, in the above-described embodiment of the present invention, the lower flange 30 is provided on the lower side by, for example, a spot welded joint portion 40 that is applied to the joint portions 60 and 64 at positions shifted to the vehicle front side and the vehicle rear side. It was connected with the flange 36.

  However, for example, as indicated by an imaginary line in FIG. 3, the lower flange 30 is lowered by a coupling portion 88 provided at a position coinciding with the coupling portions 60 and 64 and the vehicle longitudinal direction in addition to the coupling portion 40. It may be combined with the side flange 36. The joint portion 88 is formed by one-side welding such as arc welding or laser welding, and corresponds to the first joint portion in the present invention.

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above, and other various modifications can be made without departing from the spirit of the present invention. It is.

10 Body structure 14 Front pillar (body frame)
16 Division Bar (Pillar)
20 Pillar inner upper (body skeleton inner)
22 Pillar outer reinforcement upper (outer reinforcement)
24 Side outer panel 26 Front pillar outer part (body frame outer part)
28 Upper flange (upper part of body frame inner)
30 Lower flange (a part of the lower part of the body frame inner)
32 Joint (Part of the lower part of the body skeleton inner)
34 Upper flange (upper outer reinforcement)
36 Lower flange (part of the lower part of the outer reinforcement)
38 joint (fourth joint)
40 coupling part (first coupling part)
42 Closed section 48 Lower wall (a part of the lower part of outer reinforcement)
54 Division Bar Outer (Pillar Outer)
56 Gusset inner (pillar inner member)
58 Upper flange (part of the upper part of the pillar inner member)
60 coupling part (second coupling part)
62 Part to be joined (part of the upper part of the pillar inner member)
64 joint (third joint)
68 Reinforcing structure 70 Connecting wall (part of the upper part of the pillar inner member)
84 Roof side rail (body frame)
86 Center pillar (pillar)
88 joint (first joint)

Claims (2)

A vehicle body skeleton inner which constitutes a vehicle width direction inner side portion of a vehicle body skeleton which is provided on the vehicle upper side of a pillar extending in the vehicle vertical direction and extends in the vehicle longitudinal direction;
Outer reinforcement provided on the vehicle width direction outer side of the vehicle body skeleton inner and having a lower portion coupled to a lower portion of the vehicle body skeleton inner by a first coupling portion;
A vehicle body skeleton outer portion that is provided on the vehicle width direction outer side of the outer reinforcement and constitutes a vehicle width direction outer side portion of the vehicle body skeleton, and an upper end portion that extends in the vehicle vertical direction is connected to the vehicle body skeleton outer portion. A side outer panel having a pillar outer portion constituting an outer portion in the vehicle width direction of
The pillar outer portion is provided on the inner side in the vehicle width direction of the pillar outer portion, and the pillar outer portion constitutes the pillar, and the upper portion is formed on the outer side of the outer reinforcement by the second coupling portion on the outer side in the vehicle width direction than the first coupling portion. A pillar inner member coupled to the lower portion of the vehicle body skeleton inner by a third coupling portion that is coupled to the lower side of the vehicle than the first coupling portion;
The lower part of the vehicle body skeleton inner, the lower part of the outer reinforcement, and the upper part of the pillar inner member are configured with the first coupling part, the second coupling part, and the third coupling part as coupling points. Reinforcement structure with a triangular cross-section in the longitudinal direction of the body frame,
Body structure with The outer reinforcement is coupled to the upper portion of the vehicle body skeleton inner by a fourth coupling portion on the vehicle upper side than the first coupling portion, and forms a closed cross-sectional portion with the vehicle body skeleton inner,
The reinforcing structure shares the closed cross section and the lower part of the outer reinforcement,
The vehicle body structure according to claim 1.