JP2015044499A - Lateral structure of vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a lateral structure of a vehicle capable of performing mode control stably of deformation promotion at the lateral collision of the vehicle.SOLUTION: A recessed bead part 38 is formed, which is recessed toward inside a vehicle width direction at the lower end side of a base wall portion 30A in a pillar outer reinforcement 30. Generally, when the recessed bead part 38 is formed in the base wall portion 30A, it is possible to make an opportunity of folding. Thus, for example, in a lateral collision of the vehicle, the lateral impact load is inputted to a center pillar 20 side, it is possible to promote the deformation in the recessed bead portion 38. In the present embodiment, furthermore, a low strength portion 40 is set so as to be formed for overlapping to the recessed bead portion 38 concerned. Therefore, at the vehicle lateral collision, the center pillar 20 can be deformed in the recessed bead portion 38 concerned. That is, according to the present embodiment, it is possible to do the mode control more stably to deformation promotion.

Description

  The present invention relates to a side part structure of a vehicle.

  In the invention described in the following Patent Document 1, in the center pillar reinforcement of the vehicle, the vehicle is in a side collision (hereinafter referred to as “vehicle side collision”) at a position above the lower hinge mounting portion to which the rear side door is mounted. A fold promoting portion (concave bead) serving as a fold starting point is formed.

JP 2010-173562 A

  However, in the above prior art, depending on the shape of the center pillar, there is a possibility of deformation at a portion other than the fold promoting portion at the time of a side collision of the vehicle. There is room for.

  In view of the above facts, an object of the present invention is to obtain a side part structure of a vehicle capable of stably performing mode control for promoting deformation at the time of a side collision of the vehicle.

  According to the first aspect of the present invention, the side structure of the vehicle according to the present invention extends along the vehicle vertical direction at the side of the vehicle, and is disposed on the inner side in the vehicle width direction and on the inner side in the vehicle width direction. A pillar configured to include a pillar outer reinforcement, a concave or convex bead portion that is provided on the lower side in the vehicle vertical direction of the pillar outer reinforcement and protrudes along the vehicle width direction, A low-strength portion formed so as to overlap the bead portion and set to have a lower strength than a general portion in the pillar outer reinforcement.

  In the side part structure of the vehicle according to the first aspect of the present invention, the pillar extending along the vehicle vertical direction at the side part of the vehicle includes a pillar inner panel disposed inside the vehicle width direction, and a vehicle width direction. And a pillar outer reinforcement disposed on the outside.

  A concave or convex bead portion protruding along the vehicle width direction is provided on the lower side in the vehicle vertical direction of the pillar outer reinforcement, and a low strength portion is formed overlapping the bead portion. Yes. This low-strength portion is set to have a lower strength than the general portion in the pillar outer reinforcement.

  In general, by forming a concave or convex bead part in the general part, a bend part is created in the bead part at the time of a vehicle side collision (hereinafter referred to as “vehicle side collision”). It is possible to promote deformation. In the present invention, since the portion where the beat portion is formed is a low-strength portion, it is possible to further promote deformation in the bead portion at the time of a side collision of the vehicle, and the pillar can be stabilized based on the bead portion. And can be deformed.

  The side part structure of the vehicle according to the present invention described in claim 2 is the side structure of the vehicle according to the present invention described in claim 1, wherein the low strength part is provided in the bead part.

  In the side part structure of the vehicle according to the second aspect of the present invention, the low strength part is provided in the bead part, and the pillar can be stably deformed in the bead part at the time of a side collision of the vehicle.

  According to a third aspect of the present invention, the side structure of the vehicle according to the second aspect of the present invention is the vehicle side structure according to the second aspect of the present invention, wherein the low strength portion is provided in an upper portion of the bead portion in the vehicle vertical direction. Yes.

  Generally, the pillar outer reinforcement has a width dimension along the vehicle front-rear direction that increases from the vehicle vertical direction center to the vehicle vertical direction lower part. For this reason, in the bead part of the pillar outer reinforcement, the width dimension of the upper part in the vehicle vertical direction is narrower than the lower part in the vehicle vertical direction. That is, in the bead portion, the strength in the upper portion in the vehicle vertical direction is lower than that in the lower portion in the vehicle vertical direction.

  Therefore, in the vehicle side part structure according to the third aspect of the present invention, since the low-strength portion is provided in the upper portion of the bead portion in the vehicle vertical direction, the deformation can be further promoted in the upper portion of the bead portion. it can.

  The side part structure of the vehicle according to the first aspect of the present invention has an excellent effect that mode control for promoting deformation can be stably performed at the time of a side collision of the vehicle.

  The side part structure of the vehicle according to the second aspect of the present invention has an excellent effect that the pillar can be stably deformed with reference to the bead part at the time of a side collision of the vehicle.

  The side part structure of the vehicle according to the third aspect of the present invention has an excellent effect that the pillar can be more effectively and stably deformed by the bead part at the time of a side collision of the vehicle.

It is the perspective view seen from the vehicle body outer side which shows the principal part of the center pillar to which the side part structure of the vehicle of this embodiment was applied. It is sectional drawing which shows the state cut | disconnected along 2-2 line | wire of FIG. It is sectional drawing which shows the state cut | disconnected along the 3-3 line of FIG. 1 is a side view showing a vehicle body to which a side part structure of a vehicle according to an embodiment is applied.

  A side part structure of a vehicle according to an embodiment of the present invention will be described with reference to the drawings. The front side in the vehicle front-rear direction is indicated by an arrow FR, the outer side in the vehicle width direction is indicated by an arrow OUT, and the upper side in the vehicle vertical direction is indicated by an arrow UP. Moreover, in the following description, when using the front and rear direction and the up and down direction, unless otherwise specified, the front and rear direction of the vehicle and the up and down direction of the vehicle are shown.

(Configuration of vehicle side structure)
As shown in FIG. 4, the vehicle body 12 to which the vehicle side structure 10 according to the present embodiment is applied includes a rocker 14 that extends in the vehicle front-rear direction at the lower portion of the vehicle body side portion. FIG. 1 is a perspective view showing a main part of a center pillar 20 to which the side structure 10 of the vehicle is applied. FIGS. 2 and 3 show lines 2-2 and 3- Cross-sectional views taken along line 3 are shown respectively.

  As shown in FIGS. 2 and 3, the rocker 14 includes a rocker outer panel 14 </ b> A disposed on the outer side in the vehicle width direction and a rocker inner panel 14 </ b> B disposed on the inner side in the vehicle width direction. The rocker outer panel 14A is formed in a hat shape in which a cross-sectional shape cut along the vehicle vertical direction and the vehicle width direction is opened inward in the vehicle width direction. Further, an upper flange 14A1 directed upward is formed at the upper end portion of the rocker outer panel 14A, and a lower flange 14A2 directed downward is formed at the lower end portion of the rocker outer panel 14A.

  On the other hand, the rocker inner panel 14B is formed in a hat shape in which a cross-sectional shape cut along the vehicle vertical direction and along the vehicle width direction is open to the vehicle width direction outer side. Further, an upper flange 14B1 directed upward is formed at the upper end of the rocker inner panel 14B, and a lower flange 14B2 directed downward is formed at the lower end of the rocker inner panel 14B.

  The upper flange 14A1 of the rocker outer panel 14A and the upper flange 14B1 directed upward of the rocker inner panel 14B are joined by spot welding or the like. Further, the lower flange 14A2 of the rocker outer panel 14A and the lower flange 14B2 of the rocker inner panel 14B are joined by spot welding or the like. Thereby, the polygonal closed cross-section part 15 is formed between the rocker outer panel 14A and the rocker inner panel 14B.

  A front pillar 16 extends upward from the front end of the rocker 14. A front end portion of the roof side rail 18 extending along the vehicle front-rear direction is joined to the upper end portion of the front pillar 16. Further, a center pillar 20 (described later) extends upward from the center portion of the rocker 14 in the vehicle front-rear direction, and the upper end portion of the center pillar 20 extends to the vehicle front-rear direction center portion of the roof side rail 18. It is joined. Further, a rear pillar 22 extends upward from the rear end of the rocker 14, and an upper end portion of the rear pillar 22 is joined to a rear end portion of the roof side rail 18.

  As shown in FIG. 4, the rocker 14, the front pillar 16, the roof side rail 18, and the center pillar 20 form a substantially rectangular front side door opening 24 in a vehicle side view. The rocker 14, the rear pillar 22, the roof side rail 18, and the center pillar 20 form a substantially rectangular rear side door opening 26 in a side view of the vehicle. The front side door opening 24 and the rear side door opening 26 are closed by a front side door and a rear side door (not shown), so that the cabin and the outside of the vehicle can be opened and closed.

  Here, the center pillar 20 to which the vehicle side structure 10 according to the present embodiment is applied will be described. 2 and 3, the center pillar 20 includes a pillar inner panel 28 disposed on the inner side in the vehicle width direction, and a pillar outer reinforcement 30 disposed on the outer side in the vehicle width direction. Has been.

  The lower end side of the pillar outer reinforcement 30 is joined to the rocker outer panel 14A by spot welding or the like. On the other hand, the lower end side of the pillar inner panel 28 is joined to the rocker inner panel 14B by spot welding or the like. A side member outer panel (not shown) that constitutes a design surface is provided on the outer side of the pillar outer reinforcement 30 in the vehicle width direction.

  The pillar outer reinforcement 30 is a press-formed product formed by pressing a steel plate material. Specifically, as shown in FIG. 2, the pillar outer reinforcement 30 is formed in a hat shape in which a cross-sectional shape cut along the horizontal direction is opened inward in the vehicle width direction.

  As shown in FIG. 4, the pillar outer reinforcement 30 includes a base wall portion 30 </ b> A as a general portion that is formed along the vehicle vertical direction and the vehicle longitudinal direction. The base wall portion 30A is formed so that the width dimension along the vehicle front-rear direction increases as it goes from the central portion side in the vehicle vertical direction toward both ends.

  As shown in FIG. 2, a front vertical wall 30B that bends inward in the vehicle width direction is provided from the front end of the base wall 30A, and from the vehicle width direction inner end of the front vertical wall 30B. A front flange portion 30C that is bent toward the front side is formed. Further, a rear vertical wall portion 30D that bends inward in the vehicle width direction is provided from the rear end portion of the base wall portion 30A, and from the vehicle width direction inner end portion of the rear vertical wall portion 30D, the rear side A rear flange portion 30E that is bent toward the rear is formed.

  On the other hand, the pillar inner panel 28 is a press-formed product formed by pressing a steel plate material, and a cross-sectional shape cut along the horizontal direction is formed in a hat shape that opens outward in the vehicle width direction. Yes. In addition, the opening part 32 for retractor attachment is formed in this cross-sectional position.

  The pillar inner panel 28 includes a base wall portion 28A formed along the vehicle up-down direction and the vehicle front-rear direction. The base wall portion 28A extends in the vehicle front-rear direction from the center side in the vehicle up-down direction toward both ends. The width dimension along is widened. A front vertical wall portion 28B that bends outward in the vehicle width direction is provided from the front end portion of the base wall portion 28A. From the vehicle width direction outer end portion of the front vertical wall portion 28B toward the front side. A bent front flange portion 28C is formed.

  Further, a rear vertical wall portion 28D that bends outward in the vehicle width direction is provided from the rear end portion of the base wall portion 28A. From the vehicle width direction outer end portion of the rear vertical wall portion 28D, A rear flange portion 28E that is bent toward the rear is formed. Here, convex portions 28A1 projecting inward in the vehicle width direction are provided at the front portion and the rear portion of the base wall portion 28A, respectively.

  The front flange portion 28C of the pillar inner panel 28 is joined to the front flange portion 30C of the pillar outer reinforcement 30 by spot welding or the like. Further, the rear flange portion 28E of the pillar inner panel 28 is joined to the rear flange portion 30E of the pillar outer reinforcement 30 by spot welding or the like. As a result, a polygonal closed section 34 is formed between the pillar inner panel 28 and the pillar outer reinforcement 30.

  Here, in the present embodiment, as shown in FIG. 1, in the pillar outer reinforcement 30, a mounting seat 36 to which a door hinge portion of a rear side door (not shown) is attached is provided on the lower end side of the base wall portion 30A. ing. A recessed bead portion 38 as a recessed bead portion that is recessed toward the inner side in the vehicle width direction is provided below the mounting seat 36.

  As shown in FIG. 3, the concave bead portion 38 has a bottom wall 38A formed along the vehicle vertical direction in the cross-sectional shape along the vehicle vertical direction, and the vehicle width as it goes upward from the bottom wall 38A. The upper inclined portion 38B that inclines outward in the direction and the lower inclined portion 38C that inclines outward in the vehicle width direction from the bottom wall 38A toward the lower portion.

  In this embodiment, the low-strength portion 40 is formed on the concave bead portion 38 on the upper side of the concave bead portion 38 (here, on the upper inclined portion 38B and the upper inclined portion 38B side of the bottom wall 38A). ing. The low-strength portion 40 is formed from the base wall portion 30A to the front side wall portion 30B and the rear side wall portion 30D.

  Here, the low-strength portion 40 is specifically formed in the pillar outer reinforcement 30 after quenching by, for example, tempering by irradiation with laser light.

(Operation / effect of vehicle side structure)
As shown in FIG. 3, in the pillar outer reinforcement 30, a concave bead portion 38 that is recessed toward the inner side in the vehicle width direction is formed on the lower end side of the base wall portion 30A. In general, when the concave bead portion 38 is formed in the base wall portion 30A, it is possible to create an opportunity for folding. Therefore, for example, when a side collision load F from the barrier B is input to the center pillar 20 side during a side collision of the vehicle (hereinafter referred to as “vehicle side collision”), the concave bead portion 38 is deformed. Can be promoted.

  In the present embodiment, the low strength portion 40 is further formed so as to overlap the concave bead portion 38. For this reason, the center pillar 20 can be stably deformed in the concave bead portion 38 at the time of a side collision of the vehicle. That is, according to the present embodiment, the concave bead portion 38 is weaker as a material characteristic than the base wall portion 30A, so that it is possible to more stably control the mode of deformation promotion.

  In the concave bead portion 38, the upper inclined portion 38 </ b> B and the upper inclined portion 38 </ b> B side of the bottom wall 38 </ b> A serve as the low strength portion 40. The base wall portion 30A in the pillar outer reinforcement 30 is formed so that the width dimension along the vehicle front-rear direction increases as it goes from the center portion side in the vehicle vertical direction to both end sides.

  For this reason, in the concave bead part 38, the width of the upper part is narrower than that of the lower part. That is, in the concave bead portion 38, the upper portion is lower in strength than the lower portion. Therefore, the center pillar 20 is more effective in the concave bead portion 38 by forming the low-strength portion 40 in the lower strength portion. Can be transformed into

  The low-strength portion 40 is formed from the base wall portion 30A to the front side wall portion 30B and the rear side wall portion 30D, including the concave bead portion 38 in the base wall portion 30A. For this reason, in the cross section in which the concave bead part 38 was formed, it became intensity | strength lower than another cross section, and also by this, the center pillar 20 can be stably deformed stably in the concave bead part 38.

(Other embodiments)
In the present embodiment, as illustrated in FIG. 1, the example in which the concave bead portion 38 that is recessed toward the inner side in the vehicle width direction is provided below the mounting seat 36 in the pillar outer reinforcement 30 has been described. However, the pillar outer reinforcement 30 is not limited to the concave bead portion 38 as long as it can be used to create a break. For example, although not shown, instead of the concave bead 38, a convex convex bead protruding outward in the vehicle width direction may be used.

  In the present embodiment, the low-strength portion 40 is tempered by irradiation with laser light in the pillar outer reinforcement 30 after quenching, but the low-strength portion 40 is not limited to this. Absent. For example, the concave bead portion 38 may not be quenched. Furthermore, the concave bead portion 38 may be integrated with a tailored blank using a plate thickness thinner than the base wall portion 30A as a general portion. Moreover, in the concave bead part 38, you may make it integrate with a tailored blank using the low intensity | strength material whose intensity | strength is lower than the base wall part 30A. As described above, since there are various manufacturing methods for forming the low-strength portion, depending on the manufacturing method, the low-strength portion 40 may be formed in the concave bead portion 38 or more than the concave bead portion 38. The low strength portion 40 may be formed in a wide range.

  In the present embodiment, the center pillar 20 has been described. However, the present invention is not limited to the center pillar 20. For example, in addition to the center pillar 20, the present invention may be applied to the front pillar 16, the rear pillar 22, and the like.

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

10 Side structure of vehicle 12 Vehicle body 16 Front pillar (pillar)
20 Center pillar (pillar)
22 Rear pillar (pillar)
28 Pillar inner panel 30 Pillar outer reinforcement 30A Base wall (general part)
38 Concave bead (bead)
38B Upper inclined part (upper part)
40 Low strength part

Claims (3)

A pillar that extends along the vehicle vertical direction at the side of the vehicle and includes a pillar inner panel disposed on the inner side in the vehicle width direction, and a pillar outer reinforcement disposed on the outer side in the vehicle width direction. When,
A concave or convex bead portion provided on the lower side in the vehicle vertical direction in the pillar outer reinforcement and projecting along the vehicle width direction;
A low-strength portion formed so as to overlap the bead portion and set to have a lower strength than a general portion in the pillar outer reinforcement;
Side structure of a vehicle having   The vehicle side part structure according to claim 1, wherein the low-strength part is provided in the bead part.   The side part structure of the vehicle according to claim 2, wherein the low-strength portion is provided in an upper portion of the bead portion in the vehicle vertical direction.

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