JP5302617B2 - Pillar structure - Google Patents

Description

  The present invention relates to a pillar structure of a vehicle.

Conventionally, as a pillar structure, for example, as described in Japanese Patent Application Laid-Open No. 2000-108929, it has an outer wall portion on the outer side in the vehicle width direction, an inner wall portion on the inner side in the vehicle width direction, and a pair of side wall portions in the vehicle front-rear direction. And a center pillar that has a closed cross section and extends in the vehicle vertical direction, and a ring pillar (reinforcing member) provided inside the center pillar so as to face the outer wall of the center pillar. Yes. The position corresponding to the upper side of the center pillar in the ring pillar, that is, in the vicinity of the belt line portion, is configured to be recessed in a U shape in a cross sectional view.
JP 2000-108929 A

  Here, in the vicinity of the beltline portion on the upper side of the center pillar, the cross section is larger than the lower side portion of the center pillar, which is configured to bend outward in the vehicle width direction and to which a load is input during a side collision. Is configured to be small. Therefore, in the above-described pillar structure, it has been required to further suppress the deformation on the upper side of the center pillar by improving the strength on the upper side of the center pillar. However, when many reinforcing members are attached in order to improve the strength, there is a problem that the weight and cost of the pillar structure increase.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a pillar structure capable of suppressing deformation of the pillar upper side without increasing the weight and cost.

  A pillar structure according to the present invention includes an outer wall portion on the outer side in the vehicle width direction, an inner wall portion on the inner side in the vehicle width direction, and a pair of side wall portions in the vehicle front-rear direction. A reinforcing member that reinforces the pillar and extends in the vehicle up-down direction inside the upper side, the reinforcing member facing the outer wall portion of the pillar and the pair of side walls facing the side wall portion of the pillar. The reinforcing outer wall portion has an inclined portion that inclines from the one end side to the other end side in the vehicle front-rear direction by being recessed inward in the vehicle width direction in a cross-sectional view. It is characterized by.

  The vehicle upper side of the pillar (for example, the vicinity of the belt line portion) is configured to bend outward in the vehicle width direction. When a bending moment that bends inward in the vehicle width direction due to a vehicle side collision, a bending load that compresses the vehicle in the vehicle vertical direction is applied to the outer wall portion, and the vehicle inner wall portion extends in the vehicle vertical direction. Bending load is applied. At this time, since the outer wall portion is curved outward in the vehicle width direction, the outer wall portion bulges outward in the vehicle width direction when a bending load that compresses acts. On the other hand, since the inner wall portion is curved inward in the vehicle width direction, the inner wall portion bulges inward in the vehicle width direction by applying an extending bending load. Further, a shearing force of bending toward the inner side in the vehicle width direction acts on the side wall portion of the pillar. In the pillar structure according to the present invention, since the reinforcing member also extends along the pillar, the reinforcing outer wall portion of the reinforcing member also bulges outward in the vehicle width direction like the outer wall portion. Along with that, the dent of the reinforcing outer wall portion expands, and the outer wall portion and the side wall portion are deformed so that the inclination of the inclined portion becomes flat. The bending shear force acting on the side wall portion can be canceled by the vertical component of the deformation force in the vehicle width direction. Thus, the bending strength of the pillar can be substantially improved by canceling the shearing force. As described above, the deformation of the upper side of the pillar can be suppressed without excessively providing the reinforcing member and increasing the weight and cost.

  In the pillar structure according to the present invention, it is preferable that the reinforcing outer wall portion has a V-shaped portion formed by being recessed in a V shape in a cross-sectional view. As a result, a pair of inclined portions that are substantially the objects of each other are provided, so that it is possible to cancel the shear force acting on both side walls of the pillar in the vehicle front-rear direction by generating a deformation force substantially evenly. As a result, the deformation of the pillar can be stabilized.

  According to the present invention, the deformation on the upper side of the pillar can be suppressed without increasing the weight and cost.

  Hereinafter, a preferred embodiment of a vehicle body structure according to the present invention will be described with reference to the accompanying drawings. In the present specification, the forward direction when the vehicle is moving forward is defined as “front”, and terms such as “front” and “rear” are used.

  FIG. 1 is a schematic cross-sectional view of a vehicle adopting a pillar structure 1 according to an embodiment of the present invention as seen from the front, and FIG. 2 is a cross-sectional view taken along the line II-II shown in FIG. In FIG. 1, only one pillar structure 1 in the vehicle width direction is shown, and the pillar structure according to the embodiment of the present invention is also adopted in the other pillar. In the present embodiment, the case where the pillar structure 1 is applied to the center pillar will be described. However, the present invention can be applied not only to the center pillar but also to all pillars such as a front pillar and a rear pillar.

  As shown in FIG. 1, the pillar structure 1 includes a center pillar 10 that has a closed cross section and extends in the vehicle vertical direction on both sides in the vehicle width direction, and a reinforcing member 20 that is provided inside the center pillar 10. (The detailed configuration of the reinforcing member 20 will be described later). The center pillar 10 supports the underbody and upper body of the vehicle, and has a lower end connected to the rocker 2 that extends in the vehicle front-rear direction on the lower side of the vehicle and extends in the vehicle front-rear direction on the upper side of the vehicle. The upper end portion is coupled to the roof side rail 3 to be performed.

  The lower portion 10a, which is an area on the vehicle lower side of the center pillar 10, is an area to which a load is directly input from another vehicle when a side door hinge 4 is attached and a vehicle side collision occurs. On the vehicle upper side of the center pillar 10, specifically on the belt line portion 10 b and further on its upper side, it is formed in an arch shape so as to curve outward in the vehicle width direction, and its cross-sectional area is also lower. It is made smaller than the side portion 10a.

  As shown in FIG. 2, the center pillar 10 includes a pillar inner reinforcement 6 that extends in the vehicle vertical direction inside the vehicle width direction, and a pillar outer reinforcement 7 that extends in the vehicle vertical direction outside the vehicle width direction. And has a closed cross section so as to include an outer wall portion on the outer side in the vehicle width direction, an inner wall portion on the inner side in the vehicle width direction, and a pair of side wall portions in the vehicle front-rear direction. Further, in the center pillar 10, that is, inside the pillar inner reinforcement 6 and the pillar outer reinforcement 7, by extending vertically along the center pillar 10 on the vehicle upper side of the center pillar 10, A reinforcing member 20 that reinforces the portion is provided. The reinforcing member 20 is configured to bend outward in the vehicle width direction in accordance with the shape of the center pillar 10 in the vicinity of the belt line portion 10b.

  The pillar inner reinforcement 6 has a U-shaped cross section, and includes a flat plate-like inner wall portion 6a constituting the inner wall portion of the center pillar 10 on the inner side in the vehicle width direction, and the inner wall portion 6a in the vehicle front-rear direction. A pair of side wall portions 6b, 6c that project from the both ends to the vehicle width direction outer side to form a side wall portion in the vehicle front-rear direction; A flange portion 6e extending from the end of the side wall portion 6c in the vehicle width direction outside to the vehicle front direction is provided. The side wall portions 6 b and 6 c of the pillar inner reinforcement 6 extend from the inner wall portion 6 a to the flange portion of the pillar outer reinforcement 7, respectively.

  The pillar outer reinforcement 7 has a U-shaped cross section, and includes a flat plate-like outer wall portion 7a that forms an outer wall portion on the outer side in the vehicle width direction of the center pillar 10, and a vehicle outer front-rear direction of the outer wall portion 7a. A pair of side wall portions 7b, 7c that project inward in the vehicle width direction from both end portions to form a side wall portion in the vehicle front-rear direction, and a flange portion 7d that extends in the vehicle front direction from the vehicle width direction inner end of the side wall portion 7b A flange portion 7e that extends in the vehicle front direction from an end portion of the side wall portion 7c in the vehicle width direction is provided. The side wall portions 7b and 7c of the pillar outer reinforcement 7 are respectively provided with step portions 7f and 7g so as to narrow in the vehicle front-rear direction on the outer wall portion 7a side. The side wall portions 7b and 7c extend from the outer wall portion 7a to the flange portions 6d and 6e of the pillar inner reinforcement 6 so that the flange portions 7d and 7e face the flange portions 6d and 6e.

  The reinforcing member 20 is a member having a substantially M-shaped cross section that extends in the vehicle vertical direction in the center pillar 10 on the vehicle upper side of the center pillar 10, and reinforces the center pillar 10 so as to bend and deform when a vehicle side collision occurs. It has a function to suppress. The reinforcing member 20 includes a reinforcing outer wall 21 that faces the outer wall 7a of the pillar outer reinforcement 7 on the inner side in the vehicle width direction, and a reinforcing side wall that faces the side walls 7b and 7c of the pillar outer reinforcement 7 respectively. 22 and 23. The reinforcing side wall portions 22 and 23 are joined to the vicinity of the end portions on the outer side in the vehicle width direction of the side wall portions 7b and 7c of the pillar outer reinforcement 7 near the end portions on the outer side in the vehicle width direction. Further, a flange portion 24 extending toward the vehicle front side is formed at an end portion on the vehicle width direction inner side of the reinforcing side wall portion 22, and a flange portion extending toward the vehicle rear side at an end portion on the vehicle width direction inner side of the reinforcing side wall portion 23. 25 is formed. The pillar outer reinforcement 7, the pillar inner reinforcement 6, and the reinforcing member 20 are joined to each other by sandwiching and welding the flange portions 24 and 25 between the flange portions 7d and 7e and the flange portions 6d and 6e.

  The reinforcing outer wall portion 21 of the reinforcing member 20 includes a V-shaped portion 26 formed by being recessed in a V shape toward the inner side in the vehicle width direction when viewed in a transverse cross section. As a result, the reinforcing outer wall portion 21 includes an inclined portion 27 that inclines inward in the vehicle width direction from the vehicle front end portion 21a toward the vehicle rear end portion 21b, and a vehicle front end portion 21a from the vehicle rear end portion 21b. An inclined portion 28 that is inclined inward in the vehicle width direction toward the side is formed. The bent portion 26a of the V-shaped portion 26 is formed at the center position in the vehicle front-rear direction of the reinforcing outer wall portion 21 and is bent at an obtuse angle at the bent portion 26a. The bent portion 26 a of the V-shaped portion 26 is separated from the outer wall portion 7 a of the pillar outer reinforcement 7. In addition, the vehicle front side end portion 21a of the reinforcing outer wall portion 21, that is, the end portion of the inclined portion 27 is in contact with the connecting portion 7h of the outer wall portion 7a and the side wall portion 7b, and the vehicle rear side end portion 21b of the reinforcing outer wall portion 21. That is, the end portion of the inclined portion 28 is in contact with the connecting portion 7k of the outer wall portion 7a and the side wall portion 7c.

  Next, the operation and effect of the pillar structure 1 according to the present embodiment will be described with reference to FIGS. FIG. 3 is a bending moment distribution diagram showing the magnitude of the bending moment acting on the center pillar 10 due to a vehicle side collision. 4A and 4B are views of the deformation of the vicinity of the belt line portion 10b of the center pillar 10 at the time of the vehicle side collision, as seen from the front side of the vehicle. FIG. 4A shows the state before the deformation, and FIG. 4B shows the state after the deformation. Show. FIG. 5 is a diagram showing a deformation mode of the reinforcing member 20 at the time of a vehicle-side collision. In FIG. 5, the deformed reinforcing member 20 is indicated by a dotted line.

  As shown in FIG. 3, when a load F is input from each hinge portion 4 due to a vehicle side collision of the other vehicle M1, a bending moment as shown in a bending moment distribution diagram in the drawing is applied to the center pillar 10. Act. A large bending moment acts on the lower portion 10a of the center pillar 10, but a large bending moment also acts near the belt line portion 10b adjacent to the upper hinge portion 4 where the bending moment is maximized.

  As shown in FIG. 4, the vicinity of the belt line portion 10b in the center pillar 10 is configured to bend outward in the vehicle width direction. That is, the outer wall portion 7a and the inner wall portion 6a of the center pillar 10 are configured to extend in the vehicle vertical direction so as to curve outward in the vehicle width direction. Therefore, as shown in FIG. 4A, when a bending moment BM that bends inward in the vehicle width direction is applied due to a vehicle side collision, the outer wall portion 7a disposed on the outer side in the vehicle width direction from the neutral axis of bending. The bending load BL1 that compresses in the vertical direction of the vehicle acts. Further, a bending load BL2 that extends in the vehicle vertical direction acts on the inner wall portion 6a disposed on the inner side in the vehicle width direction from the bending neutral axis. At this time, since the outer wall portion 7a is curved outward in the vehicle width direction, as shown in FIG. 4B, the outer wall portion 7a bulges outward in the vehicle width direction when a bending load BL1 that compresses acts. . On the other hand, since the inner wall portion 6a is curved inward in the vehicle width direction, the inner wall portion 6a bulges inward in the vehicle width direction when an extending bending load BL2 acts. Further, a shearing force BF for bending inward in the vehicle width direction acts on the side wall portions 6b and 7b and the side wall portions 6c and 7c of the center pillar 10.

  Since the reinforcing member 20 also extends so as to curve outward in the vehicle width direction in accordance with the curvature of the center pillar 10, the reinforcing outer wall portion 21 of the reinforcing member 20 also bulges outward in the vehicle width direction, like the outer wall portion 7a. . Accordingly, as shown by a dotted line in FIG. 5, the bent portion 26a of the V-shaped portion 26 in the reinforcing outer wall portion 21 bulges outward in the vehicle width direction, and as a result, the entire V-shaped portion 26 extends in the vehicle front-rear direction. Transforms into At this time, the inclined portions 27 and 28 of the V-shaped portion 26 are deformed so that the inclination is flat, so that the connecting portion 7h between the outer wall portion 7a and the side wall portion 7b is inclined forward by the deformation of the inclined portion 27. The deformation force DF1 acts on the connecting portion 7k between the outer wall portion 7a and the side wall portion 7c, and the deformation force DF2 acts obliquely rearward due to the deformation of the inclined portion 28.

  When the deformation force DF1 acts on the connecting portion 7h and the deformation force DF2 acts on the connecting portion 7k, the side wall portions 6b and 7b and the side wall portion 6c are caused by the vertical stresses DFP1 and DFP2 that are vertical components in the vehicle width direction. , 7c, the bending shear force BF can be canceled. Thus, the bending strength of the center pillar 10 can be substantially improved by canceling the shearing force BF. As described above, the deformation of the upper side of the center pillar 10 can be suppressed without excessively providing the reinforcing member and increasing the weight and cost.

  Moreover, in the pillar structure 1 according to the present embodiment, the reinforcing outer wall portion 21 has a V-shaped portion 26 formed by being recessed in a V shape in a cross-sectional view. Accordingly, since the pair of inclined portions 27 and 28 that are the objects of each other are provided, the shear force acting on both the side wall portions 6b and 7b and the side wall portions 6c and 7c of the center pillar 10 in the vehicle front-rear direction is substantially reduced. Since the deformation force can be generated and canceled evenly, the deformation of the center pillar 10 can be stabilized.

  For comparison, a conventional pillar structure will be described. FIG. 6 is a cross-sectional view showing a conventional pillar structure in which an inclined portion is not provided on the reinforcing outer wall portion of the reinforcing member, and corresponds to FIG. FIG. 7 is a cross-sectional view illustrating a conventional pillar structure in which a recess is provided in the reinforcing outer wall portion of the reinforcing member but no inclined portion is provided, and corresponds to FIG. 2. As shown in FIG. 6, in the conventional pillar structure 50, the reinforcing outer wall portion 52 of the reinforcing member 51 is formed in a flat plate shape and is not provided with a recess. In the pillar structure 50 according to such a configuration, unlike the reinforcing member 20 according to the present embodiment at the time of a vehicle side collision, it is not possible to generate the vertical stress of the deformation force toward the vehicle width direction outer side. The shearing force due to bending acting on the side wall portion of the pillar 10 cannot be canceled. Accordingly, it is necessary to attach and reinforce a plurality of reinforcing members 53 and 54 in addition to the reinforcing member 51, and thus the weight and cost increase. Further, as shown in FIG. 7, in the conventional pillar structure 60, a U-shaped portion 63 is provided in the reinforcing outer wall portion 62 of the reinforcing member 61 by providing a U-shaped depression. The U-shaped part 63 has a pair of side wall parts 63 a and 63 b perpendicular to the reinforcing outer wall part 62. In such a pillar structure 60, the side wall parts 63 a and 63 b are deformed so as to fall into the inner side of the U-shaped part 63 at the time of a vehicle-side collision, and thus act on the side wall part of the center pillar 10. It is impossible to generate a deformation force that cancels the shearing force caused by bending. Therefore, in order to suppress the deformation of the center pillar 10, another reinforcing member is required, and the weight and cost increase.

  This embodiment is not limited to the above-described embodiment. For example, in the pillar structure 1 according to the embodiment, the entire reinforcing outer wall portion 21 of the reinforcing member 20 is formed in a V shape. However, in the pillar structure 70 according to the modification shown in FIG. A V-shaped portion 73 is formed in the reinforcing outer wall portion 72 only at the center position in the vehicle longitudinal direction. As a result, inclined portions 73 a and 73 b are formed in the reinforcing outer wall portion 72. Even with such a pillar structure 70, it is possible to generate a deformation force that cancels the shearing force that acts on the side wall portion of the center pillar 10 when the vehicle side collision occurs. Further, a pillar structure 80 according to a modified example as shown in FIG. 9 may be adopted, and in this pillar structure 80, the vehicle width from the vehicle front side to the vehicle rear side is formed on the reinforcing outer wall portion 82 of the reinforcing member 81. Only an inclined portion 83 that is inclined inward in the direction is provided. Thus, even if it is not a completely symmetrical V-shape but an asymmetric V-shape in which only an inclined portion 83 inclined in one direction is formed, the side wall portion of the center pillar 10 at the time of a vehicle side collision It is possible to generate a deformation force that cancels the shear force acting on the.

  Moreover, the shape of each wall surface part of a center pillar and each wall surface part of a reinforcement member is not limited to the above-mentioned embodiment, A various shape is employable. For example, the stepped portions 7f and 7g are provided on the side wall portion of the center pillar 10, but may not be provided. The center pillar 10 employs a pillar outer reinforcement 7 and a pillar inner reinforcement 6 having a U-shaped cross section, but only the pillar outer reinforcement is formed in a U-shaped cross section so that the pillar inner reinforcement is flat. It is good also as a shape. In addition, although the reinforcing outer wall portion of the reinforcing member and the outer wall portion and side wall portion of the pillar inner reinforcement are in contact with each other, the structure may be completely separated. The shape is not particularly limited as long as the deformation force generated by the member can be transmitted to the center pillar. Further, the reinforcing side wall portion of the reinforcing member may be connected to the reinforcing outer wall portion at an obtuse angle or may be connected perpendicularly. In short, an inclined portion is provided on the outer wall portion. For example, the shape of the reinforcing member is not particularly limited.

It is the schematic sectional view which looked at the vehicles which adopted the pillar structure concerning the embodiment of the present invention from the front. It is sectional drawing along the II-II line | wire shown in FIG. It is a bending moment distribution map which shows the magnitude | size of the bending moment which acts on a center pillar by the time of a vehicle side collision. It is the figure which looked at the mode of deformation near the belt line part of a center pillar at the time of a vehicle side collision from the vehicle front side, (a) shows the state before deformation, and (b) shows the state after deformation. It is a figure which shows the aspect of a deformation | transformation of the reinforcement member at the time of a vehicle side collision. It is sectional drawing which shows the conventional pillar structure in which the inclination part is not provided in the reinforcement outer wall part of the reinforcement member, and is a figure corresponding to FIG. It is sectional drawing which shows the conventional pillar structure in which the hollow is provided in the reinforcement outer wall part of the reinforcement member, but the inclination part is not provided, and is a figure corresponding to FIG. It is sectional drawing which shows the pillar structure which concerns on a modification, and is a figure corresponding to FIG. It is sectional drawing which shows the pillar structure which concerns on a modification, and is a figure corresponding to FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1,70,80 ... Pillar structure, 7a ... Outer wall part, 6a ... Inner wall part, 6b, 6c, 7b, 7c ... Side wall part, 10 ... Center pillar (pillar), 20, 71, 81 ... Reinforcement member, 21,72 , 82 ... Reinforcement outer wall part, 22, 23 ... Reinforcement side wall part, 21a, 21b ... End part, 26, 73 ... V-shaped part, 27, 28, 73a, 73b, 83 ... Inclination part.

Claims (2)

A pillar extending in the vehicle vertical direction, having an outer wall portion on the outer side in the vehicle width direction, an inner wall portion on the inner side in the vehicle width direction, and a pair of side wall portions in the vehicle longitudinal direction;
A reinforcing member that extends in the vehicle vertical direction along the pillar and reinforces the pillar inside the pillar on the vehicle upper side,
The reinforcing member has a reinforcing outer wall portion facing the outer wall portion of the pillar, and a pair of reinforcing side wall portions facing the side wall portion of the pillar,
The reinforcing outer wall portion, in cross-section as viewed by recessed inward in the vehicle width direction, it has a slope portion inclined toward the other end from the one end side of the vehicle longitudinal direction,
The reinforcing outer wall portion has a V-shaped portion formed by being recessed in a V shape in a cross-sectional view,
The bent structure of the V-shaped portion is separated from the outer wall portion of the pillar and is separated from the inner wall portion of the pillar.   The pillar structure according to claim 1, wherein the V-shaped portion is bent so as to have an obtuse angle at the bent portion.

Images