JP2016132371A - Vehicle pillar structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle pillar structure capable of stably bending and deforming the front and rear wall parts of an outer reinforcement to the sectional outside of a closed sectional part during side impact.SOLUTION: An outer patch 32 of a roughly U shape is stacked to be bonded on the outside surface of an outer RF 24. A front wall part 24C and a rear wall part 24D of the outer RF 24 include first wall parts 34A and 34B constituting the portion of a vehicle width-direction outside, second wall parts 36A and 36B constituting the portion of a vehicle-width inside, and widening parts 38A and 38B for interconnecting the terminal of the vehicle width-direction inside of the first wall parts 34A and 34B and the terminal of the vehicle width-direction outside of the second wall parts 36A and 36B. The widening parts 38A and 38B incline to the side of widening the vehicle longitudinal-direction width of a closed sectional part 26 toward the vehicle width-direction inside. With respect to the widening parts 38A and 38B, terminals 32X and 32Y on the vehicle width-direction inside of the outer patch 32 are arranged adjacent to each other.SELECTED DRAWING: Figure 2

Description

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

  In a vehicle pillar, for example, a closed cross section extending in the vertical direction of the vehicle body is formed by an inner panel and an outer reinforcement, and a reinforcing outer patch is disposed on the outer side in the vehicle width direction of the outer reinforcement. It is known (see, for example, Patent Document 1).

JP 2014-69632 A

  By the way, in the above structure, in order to suppress the deformation amount of the pillar at the time of side collision as much as possible, it is desired to stably bend and deform the front and rear wall portions of the outer reinforcement to the outer side of the cross section of the closed cross section at the time of the side collision. There is room for improvement from this point of view.

  In view of the above facts, an object of the present invention is to provide a vehicle pillar structure that can stably bend and deform the front and rear wall portions of the outer reinforcement to the outer side of the cross section of the closed cross section in a side collision. .

  According to a first aspect of the present invention, the pillar structure for a vehicle of the present invention is arranged along the vehicle vertical direction on the edge side of the door opening in the vehicle body side portion, and constitutes a vehicle width direction inner side portion, and the inner panel An outer reinforcement that is disposed outside the vehicle width direction and has a cross-sectional shape in a vehicle plan view that is formed in a hat shape with an opening directed inward in the vehicle width direction and that forms a closed cross-section portion with the inner panel, And an outer patch that is overlapped and joined to the outer side surface of the outer reinforcement and has a cross-sectional shape in a vehicle plan view that is formed in a substantially U shape with the opening facing inward in the vehicle width direction. The outer reinforcement includes a pair of front and rear first wall portions that constitute a portion on the outer side in the vehicle width direction and extend in the vehicle width direction in a vehicle plan view, and the outer patches are overlapped with each other. A pair of front and rear that configures an inner portion in the vehicle width direction and extends in the vehicle width direction in a plan view of the vehicle and is shifted to both sides in the vehicle front and rear direction with respect to the pair of front and rear first walls in a side view of the vehicle Connecting the second wall portion of the first wall portion with the terminal on the vehicle width direction inner side of the first wall portion and the terminal of the second wall portion with respect to the vehicle width direction outer side, and front and rear of the closed cross-section portion toward the vehicle width direction inner side. A widening portion that inclines toward the side that widens the width in the direction and in which the terminal on the inner side in the vehicle width direction of the outer patch is adjacently disposed.

  According to the above configuration, the outer reinforcement has the pair of front and rear second walls on the inner side in the vehicle width direction, whereas the outer patch is overlapped and joined to the pair of front and rear first wall portions on the outer side in the vehicle width direction. The outer patch is not superimposed on the part. For this reason, at the time of a side collision, the deformation of the pair of front and rear first wall portions on the outer side in the vehicle width direction can be suppressed, and the pair of front and rear second wall portions on the inner side in the vehicle width direction can be relatively easily deformed. Moreover, the widening part which connects the terminal of the vehicle width direction inner side of a 1st wall part and the terminal of the vehicle width direction outer side of a 2nd wall part extends the width of the vehicle front-back direction of a closed cross-section part toward the vehicle width direction inner side. The terminal on the inner side in the vehicle width direction of the outer patch is disposed adjacent to the outer patch. For this reason, at the time of a side collision, the terminal on the inner side in the vehicle width direction of the outer patch presses the widened portion and deforms the widened portion and the second wall portion to the outer side of the cross section of the closed cross section.

  As described above, according to the vehicle pillar structure of the present invention, an excellent effect that the front and rear wall portions of the outer reinforcement can be stably bent and deformed to the outer side of the cross section of the closed cross section at the time of a side collision. Have.

1 is a perspective view showing a part of a vehicle body side portion (a vehicle front-rear direction intermediate portion) to which a vehicle pillar structure according to an embodiment of the present invention is applied. It is an expanded plane sectional view which expands and shows the state cut | disconnected along 2-2 line | wire of FIG. FIG. 3A is a horizontal cross-sectional view for explaining a deformation mode in which the section modulus tends to decrease. (I) shows a state before deformation, and (ii) shows a state after deformation. FIG. 3B is a horizontal cross-sectional view for explaining a deformation mode in which the section modulus is unlikely to decrease. (I) shows a state before deformation, and (ii) shows a state after deformation. It is a graph which shows the relationship between the total plastic bending moment at the time of a side collision, and the displacement amount to the vehicle width direction inside. A solid line indicates a case where deformation is performed as shown in FIG. 5B, and a two-dot chain line indicates a case where deformation is performed as shown in FIG. FIG. 5 (A) shows a deformation mode when the collapse position of the closed cross section is closer to the load input position, and FIG. 5 (B) is the side where the collapse position of the closed cross section is far from the load input position. The deformation mode in some cases is shown.

  A vehicle pillar structure according to an embodiment of the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow IN indicates the vehicle width direction inner side.

(Configuration of the embodiment)
FIG. 1 is a perspective view of a part of a vehicle body side portion 10 (vehicle middle portion in the vehicle longitudinal direction) to which a vehicle pillar structure according to an embodiment of the present invention is applied. As shown in this figure, a roof side rail 12 is disposed at the upper portion of the vehicle body side portion 10, and the roof side rail 12 extends along the vehicle front-rear direction. On the other hand, a rocker 14 is disposed at the lower part of the vehicle body side portion 10, and the rocker 14 extends along the vehicle front-rear direction. Further, a center pillar 16 (also referred to as “B pillar”) as a pillar is erected from the middle portion in the longitudinal direction of the rocker 14 to the upper side of the vehicle, and the upper end portion of the center pillar 16 extends in the longitudinal direction of the roof side rail 12. Connected to the middle part. A front pillar (not shown) is erected on the vehicle front side of the center pillar 16, and a quarter pillar (not shown) is erected on the vehicle rear side of the center pillar 16.

  The roof side rail 12, the rocker 14, the center pillar 16, the front pillar (not shown) and the rear pillar (not shown) all have a closed cross-sectional structure and constitute a vehicle body skeleton member. A front door opening 18 as a door opening surrounded by the roof side rail 12, the center pillar 16, the rocker 14, and the front pillar (not shown) is formed on the front side of the vehicle body side portion 10. Yes. Further, a rear door opening 20 as a door opening surrounded by components including a roof side rail 12, a center pillar 16, a rocker 14, and a rear pillar (not shown) is formed on the rear side of the vehicle body side portion 10. Yes. In other words, the center pillar 16 is disposed along the vehicle vertical direction on the rear edge side of the front door opening 18 and on the front edge side of the rear door opening 20. The front pillar (not shown) is arranged along the vehicle vertical direction on the front edge side of the front door opening 18, and the rear pillar (not shown) is arranged along the vehicle vertical direction on the rear edge side of the rear door opening 20. Has been.

  The front door opening 18 and the rear door opening 20 communicate the outside of the passenger compartment with the passenger compartment. The front door opening 18 is opened and closed by a front side door (not shown), and the rear door opening 20 is opened and closed by a rear side door (not shown).

  2 is an enlarged plan cross-sectional view showing the state cut along line 2-2 in FIG. 1 in an enlarged manner. As shown in FIG. 2, the center pillar 16 includes an inner panel 22 that forms a portion on the inner side in the vehicle width direction, and an outer reinforcement 24 (hereinafter referred to as “outer RF 24”) that is disposed on the outer side of the inner panel 22 in the vehicle width direction. Abbreviated).

  The inner panel 22 includes a front flange portion 22A formed at an end portion on the vehicle front side, a rear flange portion 22B formed at an end portion on the vehicle rear side, and a terminal and a rear flange on the vehicle rear side of the front flange portion 22A. A recess 22X that connects the terminal on the vehicle front side of the portion 22B and is slightly recessed outward in the vehicle width direction is provided. The outer RF 24 is formed in a hat shape in which a cross-sectional shape in a plan view of the vehicle faces an opening toward the inside in the vehicle width direction, a front flange portion 24A formed at an end portion on the front side of the vehicle, and an end portion on the rear side of the vehicle And a rear flange portion 24B. The front flange portion 22A of the inner panel 22 and the front flange portion 24A of the outer RF 24 are joined by welding, and the rear flange portion 22B of the inner panel 22 and the rear flange portion 24B of the outer RF 24 are joined by welding. Thus, the inner panel 22 and the outer RF 24 form a closed cross-sectional portion 26 that extends substantially along the vehicle vertical direction.

  The recessed portion 22X of the inner panel 22 is bent from the vehicle rear side terminal of the front flange portion 22A and slightly extended outward in the vehicle width direction, and is bent from the vehicle front side terminal of the rear flange portion 22B. And a rear wall portion 22D slightly extended outward in the vehicle width direction. The front wall portion 22C and the rear wall portion 22D are disposed to face each other in the vehicle front-rear direction. A terminal on the vehicle width direction outer side of the front wall portion 22C and a terminal on the vehicle width direction outer side of the rear wall portion 22D are connected in the vehicle front-rear direction by the side wall portion 22E.

  Further, the outer RF 24 is bent from the vehicle rear side terminal of the front flange portion 24A and extends outward in the vehicle width direction, and is bent from the vehicle front side terminal of the rear flange portion 24B and is outer in the vehicle width direction. And a rear wall portion 24D extending in the direction. The front wall portion 24C and the rear wall portion 24D are disposed to face each other in the vehicle front-rear direction. Detailed configurations of the front wall portion 24C and the rear wall portion 24D will be described later. A terminal on the vehicle width direction outer side of the front wall portion 24C and a terminal on the vehicle width direction outer side of the rear wall portion 24D are connected in the vehicle front-rear direction by the side wall portion 24E.

  A pillar outer portion 30 that is a part of the side outer panel 28 is disposed outside the outer RF 24 in the vehicle width direction and constitutes a part of the center pillar 16. The pillar outer portion 30 is formed in a hat shape having a cross-sectional shape in a vehicle plan view with an opening facing inward in the vehicle width direction, and a front flange portion 30A formed at an end portion on the vehicle front side, and an end on the vehicle rear side And a rear flange portion 30B formed in the portion. The front flange portion 30A of the pillar outer portion 30 is superposed on the front flange portion 22A of the inner panel 22 and the front flange portion 24A of the outer RF 24 and joined by welding. The rear flange portion 30B of the pillar outer portion 30 is joined to the inner panel 22 by welding. The rear flange portion 22B and the rear flange portion 24B of the outer RF 24 are overlapped and joined by welding.

  Further, between the outer RF 24 and the pillar outer portion 30, an outer patch 32 superimposed on the outer surface of the outer RF 24 is disposed. As an example, the outer patch 32 is set over substantially the entire length of the outer RF 24 in the vehicle vertical direction, and the cross-sectional shape in a vehicle plan view is formed in a substantially U-shape (U-shape) with the opening facing inward in the vehicle width direction. Has been. That is, the outer patch 32 constitutes a portion on the outer side in the vehicle width direction and extends along the vehicle vertical direction and the vehicle front-rear direction, and is bent from the vehicle front side terminal of the side wall portion 32C. A front wall portion 32A extending inward in the direction and a rear wall portion 32B bent from a terminal on the vehicle rear side of the side wall portion 32C and extending inward in the vehicle width direction. In the outer patch 32, the side wall portion 32C is joined to the side wall portion 24E of the outer RF 24 by welding, and the front wall portion 32A is joined to a part of the front wall portion 24C of the outer RF 24 (first wall portion 34A described later) by welding. The rear wall portion 32B is joined to a part of the rear wall portion 24D of the outer RF 24 (a first wall portion 34B described later) by welding.

  As described above, the outer RF 24 has a structure in which the outer patch 32 covers the ridge line 24X forming the boundary portion between the front wall portion 24C and the side wall portion 24E and the ridge line 24Y forming the boundary portion between the rear wall portion 24D and the side wall portion 24E. ing.

  The front wall portion 24C and the rear wall portion 24D of the outer RF 24 include first wall portions 34A and 34B that constitute a portion outside the vehicle width direction, and second wall portions 36A and 36B that constitute a portion inside the vehicle width direction. Wide portions 38A and 38B that connect the terminals on the inner side in the vehicle width direction of the first wall portions 34A and 34B and the terminals on the outer side in the vehicle width direction of the second wall portions 36A and 36B are provided. The first wall portion 34A, the second wall portion 36A, and the widened portion 38A constitute the front wall portion 24C, and the first wall portion 34B, the second wall portion 36B, and the widened portion 38B are the rear wall portion 24D. Is configured.

  The pair of front and rear first wall portions 34A and 34B extend in the vehicle width direction in a vehicle plan view, and the front wall portion 32A of the outer patch 32 is overlapped with the first wall portion 34A of the front wall portion 24C. The rear wall portion 32B of the outer patch 32 is overlaid on the first wall portion 34B of the wall portion 24D. Further, the pair of front and rear second wall portions 36A and 36B extend in the vehicle width direction in a plan view of the vehicle and are shifted to both sides in the vehicle front-rear direction with respect to the pair of front and rear first wall portions 34A and 34B in a vehicle side view. Is set. An end on the inner side in the vehicle width direction of the second wall portion 36A of the front wall portion 24C is disposed adjacent to the front wall portion 22C of the inner panel 22, and an end on the inner side in the vehicle width direction of the second wall portion 36B of the rear wall portion 24D. The portion is disposed adjacent to the rear wall portion 22 </ b> D of the inner panel 22.

  Further, the widened portions 38A and 38B are inclined toward the side of increasing the width in the vehicle front-rear direction of the closed cross-sectional portion 26 toward the inner side in the vehicle width direction. A terminal 32X on the inner side in the vehicle width direction of the front wall portion 32A of the outer patch 32 is disposed adjacent to the widened portion 38A of the front wall portion 24C, and a rear portion of the outer patch 32 is disposed on the widened portion 38B of the rear wall portion 24D. A terminal 32Y on the inner side in the vehicle width direction of the wall portion 32B is adjacently disposed.

(Operation and effect of the embodiment)
Next, the operation and effect of the above embodiment will be described.

  In the present embodiment, the outer RF 24 has a pair of front and rear first wall portions 34A and 34B on the outer side in the vehicle width direction, and the outer patch 32 is overlapped and joined to the pair of front and rear sides on the inner side in the vehicle width direction. The outer patch 32 is not superimposed on the second wall portions 36A and 36B. For this reason, at the time of a side collision, the deformation of the pair of front and rear first wall portions 34A and 34B on the outer side in the vehicle width direction can be suppressed and the pair of front and rear second wall portions 36A and 36B on the inner side in the vehicle width direction can be deformed relatively easily. Can be made.

  The widened portions 38A and 38B that connect the terminals on the inner side in the vehicle width direction of the first wall portions 34A and 34B and the terminals on the outer side in the vehicle width direction of the second wall portions 36A and 36B are closed cross-sections toward the inner side in the vehicle width direction. Inclined to the side of the portion 26 in which the width in the vehicle front-rear direction is increased, and terminals 32X and 32Y on the inner side in the vehicle width direction of the outer patch 32 are arranged adjacent to each other. For this reason, at the time of a side collision, the terminals 32X and 32Y on the inner side in the vehicle width direction of the outer patch 32 press the widened portions 38A and 38B that have lower rigidity than the first wall portions 34A and 34B. That is, stress concentrates on the portion where the rigidity difference is set in the front wall portion 24C and the rear wall portion 24D of the outer RF 24. Then, the terminals 32X and 32Y on the inner side in the vehicle width direction of the outer patch 32 press the inclined wide portions 38A and 38B so that the wide portions 38A and 38B and the second wall portions 36A and 36B are out of the cross section of the closed cross section 26. Deform to the side. At this time, a desired amount of energy absorption can be ensured.

  As described above, according to the vehicle pillar structure of the present embodiment, the front wall portion 24C and the rear wall portion 24D of the outer RF 24 are stably bent and deformed outward in the cross section of the closed cross section 26 at the time of a side collision. be able to. That is, in this embodiment, the deformation mode of the center pillar 16 at the time of a side collision can be stably controlled to a deformation mode with a small deformation amount (a mode in which the section modulus is difficult to decrease).

  Here, a supplementary explanation will be given with reference to FIG. FIG. 3A is a horizontal cross-sectional view showing a model of a deformation mode in which the closed cross-section portion 48 is bent and deformed inward in the cross-section when a side collision occurs. Here, the collision load f (see FIGS. 3A and ii) is input from the state before deformation shown in FIGS. 3A and 3I, and after the deformation shown in FIGS. 3A and ii. In this state, the area of the inner space of the closed cross section 48 becomes small, and the section modulus tends to decrease. On the other hand, FIG. 3B is a horizontal sectional view showing a model of a deformation mode in which the closed cross-section portion 50 bends and deforms outward in a cross-section when a side collision occurs. Here, the collision load F (see FIGS. 3B and ii) is input from the state before deformation shown in FIGS. 3B and 3I, and after the deformation shown in FIGS. 3B and ii. In this state, the area of the inner space of the closed cross section 50 becomes large, and the section modulus is unlikely to decrease.

  That is, the deformation mode shown in FIGS. 3B and ii is a deformation mode with a smaller deformation amount when the mass of the member constituting the closed cross section is set constant. On the other hand, the deformation mode may vary depending on the input form of the collision load, but in the case of the present embodiment, the deformation mode of FIG. 3B can be stably realized.

  Next, with reference to FIGS. 4 and 5, a description will be given of a preferable bending position in the case where the closed cross-section portion is bent and deformed to the outer side in a side collision. FIG. 4 is a graph showing the relationship between the total plastic bending moment at the time of a side collision and the amount of displacement inward in the vehicle width direction. The solid line in the graph of FIG. 4 shows the case where the crushing position 54X of the closed cross-section 54 is on the side far from the input position of the load F, as shown in FIG. FIG. 5A shows a case where the crushing position 52X of the closed cross section 52 is closer to the load F input position, as shown in FIG. In the graph of FIG. 4, the solid line has a higher total plastic bending moment than the two-dot chain line, and as a result, the collapse position of the closed cross-section portion is the input position of the load F as shown in FIG. It can be seen that it is preferable to be far away from. In the case of the present embodiment, the outer RF 24 shown in FIG. 2 is not easily deformed by the outer patch 32 at the outer portion in the vehicle width direction, so that the collapse position of the closed section 26 is far from the load input position. Can be in position.

(Supplementary explanation of the embodiment)
In the above embodiment, the case where the vehicle pillar structure of the present invention is applied to the center pillar 16 has been described. However, the vehicle pillar structure of the present invention is other than the center pillar 16 such as a front pillar or a rear pillar. It may be applied to pillars.

  Although an example of the present invention has been described above, the present invention is not limited to the above, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. .

10 Body side 16 Center pillar (pillar)
18 Front door opening (door opening)
20 Rear door opening (door opening)
22 Inner panel 24 Outer reinforcement 26 Closed cross section 32 Outer patch 32X Outer patch inner terminal 32Y Outer patch inner terminal 34A First wall 34B First wall 36A Second wall 36B Second wall 38A Widened part 38B Widened part

Claims (1)

An inner panel that is disposed along the vehicle vertical direction on the edge side of the door opening at the side of the vehicle body and that constitutes a portion inside the vehicle width direction, and a cross-section in the vehicle plan view that is disposed outside the inner panel in the vehicle width direction A pillar having an outer reinforcement whose shape is formed in a hat shape with an opening facing inward in the vehicle width direction and forms a closed cross-section with the inner panel;
An outer patch that is overlapped and joined to the outer surface of the outer reinforcement, and the cross-sectional shape in a vehicle plan view is formed in a substantially U shape with the opening facing inward in the vehicle width direction;
Have
The outer reinforcement is
A pair of front and rear first wall portions which constitute a vehicle width direction outer side portion and extend in the vehicle width direction in a vehicle plan view and on which the outer patch is superimposed;
A pair of front and rear that configures a portion in the vehicle width direction and extends in the vehicle width direction in a plan view of the vehicle and is set to be shifted to both sides in the vehicle front and rear direction with respect to the pair of front and rear first walls in a side view of the vehicle A second wall,
Connect the terminal on the inner side in the vehicle width direction of the first wall portion and the terminal on the outer side in the vehicle width direction of the second wall portion, and increase the width in the vehicle front-rear direction of the closed cross section toward the inner side in the vehicle width direction. A widened portion that is inclined and is disposed adjacent to a terminal on the inner side in the vehicle width direction of the outer patch,
A vehicle pillar structure comprising:

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