JP2012126166A - Reinforcing structure in vehicle body skeleton for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing structure in a vehicle body skeleton for an automobile for improving flexural strength potential of the skeleton, and exhibiting the high restraining effect to cross-sectional collapse.SOLUTION: A reinforcing member 4 arranged on a closed cross section formed by joining an outer panel 2 and an inner panel 3 at their mutual flange parts 2a and 3a, is constituted in a bellows shape by bending and forming a plurality of long size plates extending toward the longitudinal axis direction of a center pillar 1 in a state of mutually separating bellows-shaped projection parts 5 along the short direction of the center pillar 1, a top part of the projection part 5 is joined to a halfway part of the inner panel 3, and both end parts in the short direction of a plate-like part 6 formed between the projection parts 5 in the reinforcing member 4, are interposed between the flange part 2a of the outer panel 2 and the flange part 3a of the inner panel 3, and are joined together with both flange parts 2a and 3a.

Description

  The present invention relates to a reinforcing structure in a vehicle body skeleton such as a front pillar, a center pillar, a side member, or a roof side rail of an automobile.

  As a conventional automobile body skeleton, a vehicle skeleton member described in Patent Document 1 is known. Such a vehicle skeleton member forms a center pillar having a closed cross section by joining an outer panel formed with a relatively deep-drawn cross-sectional substantially hat shape and an inner panel formed with a relatively shallow-drawn cross-sectional substantially hat shape. The outer reinforcement (reinforcing member) is arranged in the closed cross section of the center pillar. The outer reinforcement has a substantially “Z” -shaped cross section, two reinforcing surfaces arranged along two vertical walls of the outer panel, and a direction along the diagonal of the center pillar between the reinforcing surfaces, It is comprised with the connection surface which connects two reinforcement surfaces. The connection position of the connecting surface (arrangement direction) is slightly rotated in the direction of connecting the vertical wall with an external force acting on the center pillar from the outside in the vehicle width direction, extending by torsional deformation, and following the diagonal line. The position has been. With this configuration, when a load caused by a vehicle side collision or the like (a load in the direction of crushing the closed section from the outer panel side) is applied, the torsional moment and bending moment due to the load can be effectively suppressed. As a result, there is no need to increase the plate thickness of the center pillar or to add a reinforcing member other than the outer reinforcement, so that the effect of not increasing the weight is achieved.

  Therefore, it can be said that this conventional technique is constructed by connecting the outer reinforcement as the reinforcing member to both vertical walls having a relatively large area of the outer panel. As a result, it can be said that the structure is such that the center pillar is reinforced with respect to a load applied to the side impact from the outside of the vehicle.

  However, it can be said that the above-described conventional technology is not sufficient for a load caused by rollover caused by a vehicle rolling over. This is because the load due to such rollover is applied to the roof side rail side that supports the roof of the automobile and acts to bend the center pillar (particularly the inner panel) outward of the vehicle body. For this reason, it is conventionally known that a reinforcement reinforcement member is connected to the inner panel side in order to reinforce the center pillar against the rollover of the automobile so as not to be bent outward. However, in order to secure the vehicle compartment space as wide as possible, the inner panel is normally configured to have a substantially flat plate shape, unlike the outer panel, which cannot secure a very high vertical wall. As a result, even if the reinforcing member is connected to the inner panel, it cannot be connected using the vertical wall like the outer panel.

  Therefore, in the prior art, two methods as shown in FIGS. 7 and 8 are known as a method of connecting the reinforcing member to the inner panel. In the method shown in FIG. 7, the inner panel a and the outer panel b are formed in a closed cross-sectional shape by joining the flange portions c and d to each other, and when the reinforcing member e is disposed in the closed cross-section, The member e is composed of a flat plate and is arranged so as to extend so as to form a straight shear surface in a state where it is sandwiched between the flange portion c of the inner panel a and the flange portion d of the outer panel b, The flange part f is joined to the parts c and d, and the outer reinforcement i is attached to the inner surface of the outer panel b (a similar technique is disclosed in Patent Document 2).

  Further, in the method shown in FIG. 8, when the inner panel a and the outer panel b are joined to each other with the flange portions c and d to form a closed cross section, and the reinforcing member e is disposed in the closed cross section, The reinforcing member e has a cross-sectional shape that conforms to the inner wall shape of the inner panel a, so that the inner surface of the inner panel a is disposed so as to be close thereto, and the flange portion f of the reinforcing member e is disposed on the inner panel. a by connecting with each other in a state of being sandwiched between the flange portion c of a and the flange portion d of the outer panel b, and further by connecting the top portion g of the reinforcing member e to the middle portion h of the inner panel a. Therefore, an outer reinforcement i is attached to the inner surface of the outer panel b (a similar technique is described in Patent Document 3).

JP 2007-112203 A JP 2006-248461 A JP 2009-292367 A

  However, in the method shown in FIG. 7, since the reinforcing member e exhibits a straight shear surface and does not have a ridgeline, it can be said that it is effective in suppressing the cross-sectional collapse against a localized concentrated load. For the load that is applied from the roof side rail when the car rolls over and tries to bend the center pillar from the vertical direction of the car, it acts as a force in the direction of crushing the cross-sectional shape of the center pillar. Since the reinforcing member e does not have a ridge line, the effect on improving the potential of the bending strength of the skeleton is low, and in order to ensure the bending strength, it depends on other skeleton strength.

  Further, in the method shown in FIG. 8, since the reinforcing member e has a three-point joining structure in which the top part g is joined to the inner panel a together with the flange part f, these three joint parts are stretched. , The bending strength potential of the skeleton can be improved, but the cross-section collapses because the cross-sectional circumference is longer than the shear plane structure shown in FIG. The suppression effect is low.

  SUMMARY OF THE INVENTION The present invention has been made in view of such an unsolved problem in the prior art, and has an object to provide a reinforcing structure in a vehicle body skeleton that improves the bending strength potential of the skeleton and exhibits a high suppression effect against cross-sectional collapse. .

  According to the present invention, a reinforcing structure for a vehicle body skeleton is formed in a closed cross-section by joining an outer panel disposed on the outside of a vehicle and an inner panel disposed on a vehicle compartment side by joining flange portions thereof. And a reinforcing structure in a vehicle body skeleton configured by disposing a reinforcing member in a closed cross section, wherein the reinforcing member is a long flat plate extending in the longitudinal axis direction of the skeleton body. A plurality of convex portions are bent and formed in a state of being separated from each other along the short direction of the skeleton body, and the top portion of the convex portions is joined to the middle portion of the inner panel. And both ends in the short direction of the flat plate portion formed between the convex portions of the reinforcing member are interposed between both flange portions of the outer panel and the inner panel and joined together with both flange portions. .

  According to the present invention, for example, when a car encounters a side collision, when a load in the direction of crushing the closed cross section formed by the outer panel and the inner panel is applied, the flange portions to be joined to each other are on the outside. Although it is going to escape, the flat plate-like part of the reinforcing member is interposed between the outer panel and the flange part of the inner panel and joined, so the tensile force due to the function of the so-called shear plane structure is exhibited and the cross-sectional collapse phenomenon Can be suppressed.

  Further, according to the present invention, the plurality of convex portions in the reinforcing member have a ridge line, and the top portion is joined to the middle part of the inner panel, and the flat plate shape exists between the adjacent convex portions. Because the part is interposed and joined between the flange part of the inner panel and the outer panel, for example, for the bending deformation load in the longitudinal axis direction of the skeleton body due to the rollover that occurred when the automobile encountered a rollover accident, Since the reinforcing member functions as a partition wall such as a bulkhead, it contributes to the improvement of the potential of the cross-sectional strength of the skeleton, and the bending deformation of the skeleton body in the longitudinal axis direction can be suppressed.

  According to another aspect of the present invention, there is provided a reinforcing structure for an automobile body skeleton, wherein, in the above invention, the arrangement gaps between the convex portion and the flat plate portion of the reinforcing member are arranged differently. .

  With such a configuration, for example, a skeleton body having a substantially hat-shaped cross section, such as a roof side rail or a side member, can be optimally employed for a skeleton structure that mainly suppresses bending deformation with little torsional deformation.

  According to the present invention, for example, when a car encounters a side collision, when a load in the direction of crushing the closed cross section formed by the outer panel and the inner panel is applied, the flange portions to be joined to each other are on the outside. Although it is going to escape, the flat plate-like part of the reinforcing member is interposed between the outer panel and the flange part of the inner panel and joined, so the tensile force due to the function of the so-called shear plane structure is exhibited and the cross-sectional collapse phenomenon Can be suppressed.

  Further, according to the present invention, the plurality of convex portions in the reinforcing member have a ridge line, and the top portion is joined to the middle part of the inner panel, and the flat plate shape exists between the adjacent convex portions. Because the part is interposed and joined between the flange part of the inner panel and the outer panel, for example, for the bending deformation load in the longitudinal axis direction of the skeleton body due to the rollover that occurred when the automobile encountered a rollover accident, Since the reinforcing member functions as a partition wall such as a bulkhead, it contributes to the improvement of the potential of the cross-sectional strength of the skeleton, and the bending deformation of the skeleton body in the longitudinal axis direction can be suppressed.

It is the perspective view which drawn the center pillar employ | adopted as one Example of the reinforcement structure in the vehicle body side part as a vehicle body frame | skeleton concerning this invention from the motor vehicle outer side. It is a disassembled perspective view of the center pillar which comprises the vehicle body side part in FIG. It is an enlarged view of the upper part of the center pillar in FIG. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a perspective view of the reinforcement member applied to the center pillar as a vehicle body frame for vehicles concerning other examples of this invention. It is a cross-sectional view of a center pillar according to a conventional technique. It is a cross-sectional view of a center pillar according to another conventional technique.

  The reinforcing structure for an automobile body skeleton in the embodiment according to the present invention is configured as a reinforcing structure for an automobile body skeleton that improves the potential of bending strength of the skeleton and exhibits a high suppression effect against cross-sectional collapse.

  Next, a reinforcing structure in an automobile body skeleton according to an embodiment employing the present invention will be described with reference to the drawings. First, the case where one embodiment according to the present invention is applied to a center pillar as a vehicle body side frame will be described with reference to FIGS.

  That is, as shown in FIG. 1, the center pillar 1 constituting the skeleton body as the side skeleton of the automobile has a roof side rail 11 and a side sill extending in the longitudinal direction of the automobile and spaced apart from each other. 12. As shown in FIG. 2, the center pillar 1 has a configuration in which a closed cross section 1a is formed by joining an outer panel 2 arranged on the vehicle exterior side and an inner panel 3 arranged on the vehicle compartment side. . From this, the outer panel 2 is formed in a substantially deep-drawn cross-sectional substantially hat shape that protrudes outward from the automobile, and the inner panel 3 is a relatively shallow-drawn cross-section to ensure a vehicle interior space. As a result, the closed section 1a is formed by joining the flange portions 2a and 3a formed at both ends on the short side. Further, the outer side of the outer panel 2 is covered with an outer plate, and the vehicle interior side of the inner panel is covered with interior parts.

  A reinforcing member 4 is disposed in a closed cross section 1 a formed by the outer panel 2 and the inner panel 3. The reinforcing member 4 is a long flat plate extending in the closed cross section 1a toward the vertical direction of the automobile (longitudinal axis direction of the center pillar 1) along the longitudinal direction of the automobile (short direction of the center pillar). A plurality of bellows-like convex portions 5 are formed so as to be separated from each other. As a result, the reinforcing member 4 has a plurality of flat plate-like parts 6 in a state of being sandwiched between the convex parts 5. And in one Example, the convex part 5 and the flat part 6 in the reinforcement member 4 are arrange | positioned with the substantially same space | interval.

  Furthermore, the top part 5a of each convex part 5 is joined to the middle part 3b of the inner panel 3 by spot welding or the like. Further, each flat plate-like portion 6 is joined by spot welding or the like together with both flange portions 2a and 3a with both ends in the short direction interposed between the flange portion 2a of the outer panel 2 and the flange portion 3a of the inner panel 3. Has been.

  In one embodiment according to the present invention having the above-described configuration, for example, when a car encounters a side collision, the load in the direction of crushing the closed cross section 1a formed by the outer panel 2 and the inner panel 3 in the center pillar 1 is obtained. Is applied, the flange portions 2a and 3a joined to each other tend to escape outward, but the flat plate-like portion 6 of the reinforcing member 4 is located between the flange portions 2a and 3a of the outer panel 2 and the inner panel 3. Since it is interposed and joined, it is possible to exert a tensile force due to the function of a so-called shear plane structure and suppress the cross-sectional collapse phenomenon.

  Moreover, according to this one Example, while the some convex-shaped part 5 in the reinforcement member 4 has a ridgeline, and the top part 5a is joined to the middle part 3b of the inner panel 3, it is adjacent convex shape. Since the flat plate-like portion 6 existing between the portions 5 is interposed and joined between the flange portions 2a and 3a of the outer panel 2 and the inner panel 3, for example, a center due to a rollover caused when a car encounters a rollover accident. With respect to the bending deformation load in the longitudinal axis direction of the pillar 1, the reinforcing member 4 functions as a partition wall such as a bulkhead, contributing to an improvement in the potential of the cross-sectional strength of the skeleton, The bending deformation in the longitudinal axis direction can be suppressed.

  FIG. 6 shows a reinforcing member 4 applied to the center pillar according to another embodiment of the present invention. The reinforcing member 4 shown in FIG. 6 is formed in a bellows shape with a plurality of convex portions 5 and a flat plate portion 6 disposed between the adjacent convex portions 5 in the same manner as in the first embodiment. However, it is different in that the arrangement gaps between the convex portion 5 and the flat plate portion 6 are different from each other in the longitudinal axis direction. In addition, the reinforcing member 4 has the top 5a of each convex part 5 joined to the middle part 3b of the inner panel 3 by spot welding or the like, and each flat part 6 has both ends in the short direction at the outer panel 2. It is the same as that of the said one Example that it is interposed between the flange part 2a of this and the flange part 3a of the inner panel 3, and is joined by spot welding etc. with both flange parts 2a and 3a.

  Therefore, it can be said that the other embodiment exhibits the same function and effect as the first embodiment. In addition, for example, a skeleton member having a substantially hat-shaped cross section such as a roof side rail or a side member. In addition, it can be optimally employed for a skeleton structure that mainly suppresses bending deformation with little torsional deformation.

  Since the present invention described above improves the bending strength potential of the skeleton and exhibits a high suppression effect against cross-sectional collapse, automobiles such as automobile front pillars, center pillars, side members, or roof side rails. It can be said that it is suitable for a reinforcing structure in a vehicle body skeleton.

1 Center pillar (frame body)
1a Closed section 2 Outer panel 2a Flange part 3 Inner panel 3a Flange part 3b Middle part 4 Reinforcement member 5 Convex part 5a Top part 6 Flat part

Claims (2)

  An outer panel disposed on the vehicle exterior side and an inner panel disposed on the vehicle compartment side are formed in a closed cross section by joining the flange portions thereof to form a skeleton body, and a reinforcing member is provided in the closed cross section. A reinforcing structure in a vehicle body skeleton arranged and configured, wherein the reinforcing member extends a long flat plate extending in a longitudinal direction of the skeleton body along a short direction of the skeleton body. A plurality of convex portions are bent in a state of being separated from each other, and are formed in a bellows shape, and the top portion of the convex portion is joined to the middle portion of the inner panel, and the convex portion of the reinforcing member An automobile characterized in that both ends in the lateral direction of the flat plate-like portion formed between the two shaped portions are interposed between the flange portions of the outer panel and the inner panel and joined together with the flange portions. Reinforcing structure in the vehicle body frame.   A reinforcing structure for a vehicle body skeleton for an automobile, wherein the projecting portion and the flat plate portion of the reinforcing member are arranged to have different arrangement gaps.

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