JP2019093814A - Vehicle body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body structure capable of reducing the amount of an impacted object invading the vehicle interior side while maintaining a deformation mode in which the vicinity of a joint portion between an upper panel and a lower panel of a reinforcement panel is bent at the time of a side collision. SOLUTION: A reinforcement panel 13 having an upper panel 14 arranged on a closed cross section of a pillar 10 and joined by welding at each end surface and a lower panel 15 thinner than the upper panel 14 and a reinforcement panel 13 arranged inside a front door and extending in the front-rear direction. In a vehicle body structure including a door beam 41 located outside the pillar 10 in the vehicle width direction in a front view, the upper panel 14 has a bead 17 that covers the outside of the fragile portion 16 on the door beam 41 side in a side view. .. [Selection diagram] Fig. 2

Description

  The present invention relates to a vehicle body structure including an upper panel disposed on a closed cross section of a pillar extending in the vertical direction and joined by welding at each end face and a reinforcement panel having a lower panel thinner than the upper panel.

  A center pillar reinforcing structure of an automobile is known in which a reinforcement panel is disposed between an outer panel and an inner panel of a center pillar which extends vertically and forms a rear edge of a front door opening (see, for example, Patent Document 1) ). In the vehicle body structure described in Patent Document 1, the reinforcement panel is a tailored blank consisting of an upper panel and a lower panel thinner than this, and the joint portion between the upper panel and the lower panel is positioned lower than the belt line and in the front door The rear end of the directed door beam is located near the lower side of the joint.

Japanese Patent Laid-Open No. 2000-85620

However, in the vehicle body structure described in Patent Document 1, all load from the door beam side is transmitted to the relatively low strength lower panel at the time of a side collision, which may increase the intruding amount of the collision object to the vehicle interior side. is there.
Here, in order to reduce the amount of collision of the collision object into the vehicle cabin, it is conceivable to transmit the load from the door beam side to the upper panel having a relatively high strength. However, fragile parts such as holes are often formed in the upper panel, and when the load is transmitted to the upper panel, the upper panel deforms from the fragile part as a starting point, so the vicinity of the joint between the upper panel and the lower panel at the side collision Can not be in the deformation mode for bending, and the amount of intrusion may be increased.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to maintain a deformation mode in which the vicinity of a junction between an upper panel and a lower panel of a reinforcement panel is maintained at the time of a side collision. An object of the present invention is to provide a vehicle body structure capable of reducing the amount of intrusion to the indoor side.

  In order to achieve the above object, according to the present invention, an upper panel disposed in a closed cross section of a pillar extending in the vertical direction and joined by welding at the end faces of each other and a reinforcement panel having a lower panel thinner than the upper panel; And a door beam extending in the front-rear direction and located on the outer side in the vehicle width direction than the pillar in a front view, the door beam being arranged such that one end side thereof overlaps the upper panel in a side view, the upper panel A vehicle body structure is provided which has a fragile portion spaced apart from the door beam in a side view, and the upper panel has a bead which covers the outside of the fragile portion on the side of the door beam in a side view. Ru.

According to this vehicle body structure, when the door beam moves inward in the vehicle width direction during a side collision, a load is applied to the upper panel of the reinforcement panel from the door beam side. At this time, although the fragile portion of the upper panel is easily deformed, the outer side of the fragile portion on the door beam side is covered by the bead, so the load from the door beam side is difficult to transmit to the fragile portion and deformation of the fragile portion is suppressed. . Then, the load from the door beam side is transmitted to the joint between the upper panel and the lower panel, and a deformation mode is realized in which the vicinity of the joint between the upper panel and the lower panel is bent.
In addition, since the upper panel is thicker than the lower panel, the overall strength is higher than that of the lower panel, and the amount of intrusion of the collision object to the vehicle interior side is reduced compared to the case where all the load from the door beam is transmitted to the lower panel. Can.
Furthermore, the deformation of the fragile portion can be suppressed without adding a reinforcing member or the like around the fragile portion of the upper panel, and there is no increase in weight and cost.

  The vehicle body structure further includes a second door beam disposed below the door beam inside the door, extending in the front-rear direction, and positioned outside the pillar in the vehicle width direction in a front view, the second door beam having a side view One end side may be arranged to overlap the lower panel.

  According to this vehicle body structure, when a side collision occurs, a load is applied to the upper panel from the door beam side, while a load is applied to the lower panel from the second door beam side. Thereby, the load from the door side can be distributed and transmitted to the upper panel and the lower panel of the reinforcement panel, and the load does not concentrate on any of the upper and lower panels.

  In the above-described vehicle body structure, the pillar may be a center pillar that forms a rear portion of a front door opening, and the door beam and the second door beam may be disposed inside the front door.

  According to this vehicle body structure, when a load is applied to the center pillar from the rear end side of the front door door beam and the second door beam at the time of a side collision, the deformation mode of the center pillar can be accurately controlled.

  In the vehicle body structure, the upper panel may have a ridgeline extending in the vertical direction behind the fragile portion, and a rear end of the bead may be disposed in front of the ridgeline.

  According to this vehicle body structure, the ridge line of the upper panel is not shredded by the bead, and the strength and the rigidity of the entire center pillar are not reduced.

  In the vehicle body structure, the fragile portion may be a hole.

  According to this vehicle body structure, the harness or the like can be inserted into the reinforcement panel by using the hole portion of the upper panel, and the weight reduction of the upper panel can be achieved.

  In the vehicle body structure, the bead may be formed above a center line of the door beam.

  According to this vehicle body structure, when the door beam moves inward in the vehicle width direction at the time of a side collision, the entire bead intervenes between the fragile portion and the door beam, efficiently transmitting the load from the door beam side to the fragile portion It can be suppressed.

  In the above-mentioned vehicle body structure, the bead may have an equidistant interval at which the distance between the bead and the fragile portion is substantially constant.

  According to this vehicle body structure, since the distance between the outer edge of the bead and the fragile portion is substantially constant, the load is not easily transmitted from the specific portion of the bead to the fragile portion, and the deformation of the fragile portion is effectively suppressed. Be done.

  According to the present invention, it is possible to reduce the amount of the collision object entering the vehicle interior while maintaining the deformation mode in which the vicinity of the joint portion between the upper panel and the lower panel of the reinforcement panel is bent at the side collision.

It is a schematic side view of the vehicle body structure which shows one Embodiment of this invention. It is a side view of a reinforcement panel. It is a plane sectional view of a center pillar. It is front schematic explanatory drawing which shows the positional relationship of a reinforcement panel and a door beam. It is front schematic explanatory drawing which shows the movement of the door beam at the time of a side collision.

  1 to 5 show an embodiment of the present invention. FIG. 1 is a schematic side view of a vehicle body structure, FIG. 2 is a side view of a reinforcement panel, FIG. 3 is a plan sectional view of a center pillar, FIG. 5 is a schematic front view showing the positional relationship between the reinforcement panel and the door beam, and FIG. 5 is a schematic front view showing the movement of the door beam at the time of a side collision.

  As shown in FIG. 1, the vehicle body 1 is configured by assembling panel-like members obtained by press-forming a steel plate, for example, and joining them by spot welding or the like. The vehicle body 1 includes a pair of left and right center pillars 10 extending in the vertical direction, a pair of left and right side sills 20 connected to the lower end side of the center pillar 10 and extending in the front and rear direction, and left and right And a pair of roof side rails 30.

  The center pillar 10 forms a rear portion of the front door opening, and a door beam extending in the front-rear direction and located on the outer side in the vehicle width direction than the center pillar 10 in a front view is disposed inside the front door. In the present embodiment, two door beams of an upper beam 41 and a lower beam 42 are disposed inside the front door. The center pillar 10 is formed such that the cross section in plan view is a closed cross section, and the reinforcement panel 13 is disposed in the closed cross section. Further, the side sill 20 and the roof side rail 30 are formed such that the cross section in the front view is a closed cross section.

  As shown in FIG. 2, the reinforcement panel 13 is a so-called tailored blank, and includes an upper upper panel 14 and a lower lower panel 15 thinner than the upper panel 14, joined together by welding. The reinforcement panel 13 has a substantially inverted T-shape as a whole, and the lower lower panel 15 is formed into three branches extending in the lateral direction and the upward direction, and the upper upper panel 14 is formed to extend upward from the upper end of the lower panel 15 . In the present embodiment, the lower end surface of the upper panel 14 and the upper end surface of the lower panel 15 are joined by plasma welding, and a weld bead is formed in the joint portion of each panel 14, 15. In the present embodiment, the boundary between the upper panel 14 and the lower panel 15 is set lower than the waist of the occupant.

  The upper beam 41 and the lower beam 42 extend in the front-rear direction, and are located on the outer side in the vehicle width direction than the center pillar 10 in a front view. The upper beam 41 is disposed so that the rear end side thereof overlaps the upper panel 14 in a side view. The lower beam 42 is disposed so that the rear end side thereof overlaps the lower panel 15 in a side view.

  The upper panel 14 has a front flange portion 14a, a first inclined portion 14b, a first flat portion 14c, a second inclined portion 14d, a second flat portion 14e, a third inclined portion 14f, and a rear flange portion, from the front side to the rear side. I have 14g in this order. The front side flange portion 14 a and the rear side flange portion 14 g are formed substantially flat, and are connected to an inner panel 11 and an outer panel 12 described later. The first inclined portion 14b is inclined rearward and outward in the vehicle width direction. The first flat portion 14c occupies most of the upper panel 14 in a side view, and is formed substantially flat. The second inclined portion 14 d is inclined rearward and outward in the vehicle width direction. The second flat portion 14 e is located on the outermost side in the vehicle width direction in the upper panel 14 and formed substantially flat. In the present embodiment, the second flat portion 14 e has a ridge line extending in the vertical direction in the upper panel 14. The third inclined portion 14f inclines inward in the vehicle width direction toward the rear.

  The upper panel 14 has a hole 16 as a fragile portion formed in the first flat portion 14c. The second flat portion 14 e which is a ridge line extending in the vertical direction is located behind the hole 16. In the present embodiment, the hole 16 is formed to be vertically long, and the harness is inserted therethrough. Further, the weight reduction of the upper panel 14 is achieved by the hole portion 16. The hole 16 is spaced apart from the upper beam 41 in a side view. In the present embodiment, the rear end of the upper beam 41 is located diagonally forward and downward of the hole 16 in a side view.

  Moreover, the upper panel 14 has the bead 17 formed in the 1st flat part 14c. The rear end of the bead 17 is located on the front side of the second flat portion 14 e forming a ridge line extending in the vertical direction. As a result, the ridge lines of the upper panel 14 are not cut by the beads 17, and the strength and rigidity of the entire center pillar 10 are not reduced.

  The bead 17 covers the outer side of the hole 16 on the upper beam 41 side in a side view. That is, in the present embodiment, the bead 17 is formed on the front lower side of the hole 16 in a side view. The bead 17 is formed to be convex toward the outer side in the vehicle width direction, and is formed above the center line 41 a of the upper beam 41. The bead 17 has an equidistant section 17 a at the outer edge on the hole 16 side, the distance to the hole 16 being substantially constant.

  The upper end side of the lower panel 15 is formed continuously with the upper panel 14, and the lower panel 15 is, like the upper panel 14, directed from the front to the rear, the front flange 15 a, the first inclined portion 15 b, the first flat portion 15 c, the second The inclined portion 15d, the second flat portion 15e, the third inclined portion 15f, and the rear flange portion 15g are provided in this order. The front flange portion 15 a and the first inclined portion 15 b extend obliquely downward from the upper end of the lower panel 15 to the front end. On the other hand, the second inclined portion 15d, the second flat portion 15e, the third inclined portion 15f, and the rear flange portion 15g extend obliquely rearward from the upper end to the rear end of the lower panel 15.

  Further, the lower panel 15 has a lower flange portion 15i and a fourth inclined portion 15h in this order on the lower end side from the lower side to the upper side. The lower flange portion 15i is formed substantially flat and connected to the side sill 20. The fourth inclined portion 15h inclines outward in the vehicle width direction toward the upper side. The upper end of the fourth inclined portion 15h is connected to the lower end of the first flat portion 15c.

  As shown in FIG. 3, the center pillar 10 has an inner panel 11 located on the inner side in the vehicle width direction and an outer panel 12 located on the outer side in the vehicle width direction. The inner panel 11 has a front side flange portion 11a, a first inclined portion 11b, a flat portion 11c, a second inclined portion 11d, and a rear side flange portion 11e in this order from the front side to the rear side. The front side flange portion 11 a and the rear side flange portion 11 e are formed substantially flat, and are joined to the front side flange portion 14 a of the upper panel 14 by spot welding. The first inclined portion 11b is inclined rearward inward in the vehicle width direction. The flat portion 11c occupies most of the inner panel 11 in a side view and is formed substantially flat. The second inclined portion 11d is inclined rearward in the vehicle width direction.

  On the other hand, the outer panel 12 has a front side flange portion 12a, a first inclined portion 12b, a flat portion 12c, a second inclined portion 12d, and a rear side flange portion 12e in this order from the front side to the rear side. The front flange portion 12a and the rear flange portion 12e are formed substantially flat, and are joined to the front flange portion 14a of the upper panel 14 by spot welding. The first inclined portion 12b is inclined rearward and outward in the vehicle width direction. The flat portion 12c occupies most of the outer panel 12 in a side view and is formed substantially flat. The second inclined portion 12d is inclined rearward and outward in the vehicle width direction.

  According to the vehicle body structure configured as described above, as shown in FIG. 4, the upper beam 41 is positioned outside the bead 17 of the upper panel 14 of the reinforcement panel 13 in the vehicle width direction via the door panel 40 and the outer panel 12. doing. Then, as shown in FIG. 5, when the upper beam 41 moves inward in the vehicle width direction at the side collision, a load is applied to the upper panel 14 of the reinforcement panel 13 from the upper beam 41 side. Specifically, the rear end side of the upper beam 41 presses the lower front side of the bead 17 in the upper panel 14 inward in the vehicle width direction.

At this time, although the hole portion 16 of the upper panel 14 is relatively fragile, it is easily deformed, but since the bead 17 covers the outer side of the hole portion 16 on the upper beam 41 side, the load from the upper beam 41 side is the hole portion 16 It is hard to transmit to the side, and the deformation of the hole 16 is suppressed. Then, the load from the upper beam 41 side is transmitted to the joint between the upper panel 14 and the lower panel 15, and a deformation mode is realized in which the vicinity of the joint between the upper panel 14 and the lower panel 15 is bent. Therefore, when a load is applied to the center pillar 10 from the rear end side of the upper beam 41 and the lower beam 42 of the front door at the time of a side collision, the deformation mode of the center pillar 10 can be properly controlled.
Moreover, since the upper panel 14 is thicker than the lower panel 15, the overall strength is higher than that of the lower panel 15, and compared to the case where all the load from the door beam side is transmitted to the lower panel 15, Can be reduced.
Furthermore, the deformation of the hole 16 can be suppressed without adding a reinforcing member or the like around the hole 16 of the upper panel 14, and the increase in weight and cost is not caused.

  In the present embodiment, since the bead 17 is located above the center line 41 a of the upper beam 41 in side view, when the upper beam 41 moves inward in the vehicle width direction during a side collision, the entire bead 17 is a hole. Since it intervenes between the portion 16 and the upper beam 41, the transfer of the load from the upper beam 41 side to the fragile portion can be efficiently suppressed. Furthermore, since the distance between the outer edge of the bead 17 and the hole 16 is substantially constant, it is not easy to transmit the load from the specific part of the bead 17 to the hole 16, and deformation of the fragile portion is effectively suppressed. Ru.

  Thus, while a load is applied to the upper panel 14 from the upper beam 41 side at the time of a side collision, a load is applied to the lower panel 15 from the lower beam 42 side. Thereby, the load from the front door side can be distributed and transmitted to the upper panel 14 and the lower panel 15 of the reinforcement panel 13, and the load does not concentrate on any of the upper and lower panels.

  In the above embodiment, although the example in which the present invention is applied to the center pillar 10 is shown, it is needless to say that the present invention may be applied to the front pillar and the rear pillar. Moreover, although the example which applied this invention to the rear end side of the door beam of a front door was shown, even if it is a front door and a rear door if a door beam is arrange | positioned, it is applicable and the front end side of a door beam And the rear end side are applicable. The upper beam 41 and the lower beam 42 are shown to be disposed inside the door, but if one end of at least one door beam overlaps the upper panel in a side view, it is disposed inside the door The door beam may be one or three or more.

  Further, in the above embodiment, although the hole portion 16 is formed as the fragile portion, for example, as in the case of the bent portion, if the upper panel 14 is formed with a portion which is more fragile than other portions, The present invention can be applied to this fragile portion.

  In the above embodiment, the bead 17 is generally formed above the center line 41 a of the upper beam 41, but at least a part of the bead 17 is above the center line 41 a of the upper beam 41. If it exists, the deformation | transformation suppression effect | action of the hole 16 can be obtained. Moreover, the bead 17 does not necessarily have to have the equidistant section 17a, and the shape of the bead 17 can be appropriately changed as needed.

  As mentioned above, although embodiment of this invention was described, embodiment described above does not limit the invention which concerns on a claim. In addition, it should be noted that not all combinations of features described in the embodiments are essential to the means for solving the problems of the invention.

Reference Signs List 1 vehicle body 10 center pillar 11 inner panel 12 outer panel 13 reinforcement panel 14 upper panel 14 e second flat portion 15 lower panel 16 hole portion 17 bead 17 a equal distance section 41 upper beam 41 a center line 42 lower beam

Claims (7)

An upper panel disposed on a closed cross section of a pillar extending in the vertical direction and joined by welding at the end faces of each other and a reinforcement panel having a lower panel thinner than the upper panel;
A door beam disposed inside the door, extending in the front-rear direction, and located outside the pillar in the vehicle width direction in a front view,
The door beam is disposed such that one end thereof overlaps the upper panel in a side view,
The upper panel has a fragile portion spaced apart from the door beam in a side view,
The vehicle body structure in which the upper panel has a bead which covers the outside of the fragile portion on the side of the door beam in a side view. A second door beam is disposed below the door beam inside the door, extends in the front-rear direction, and is positioned outside the pillar in the vehicle width direction in a front view,
The vehicle body structure according to claim 1, wherein the second door beam is arranged such that one end side thereof overlaps the lower panel in a side view. The pillar is a center pillar that forms the rear of the front door opening,
The vehicle body structure according to claim 1, wherein the door beam and the second door beam are disposed inside the front door. The upper panel has a ridge line extending in the vertical direction behind the fragile portion,
The vehicle body structure according to any one of claims 1 to 3, wherein a rear end of the bead is disposed in front of the ridgeline.   The vehicle body structure according to any one of claims 1 to 4, wherein the fragile portion is a hole.   The vehicle body structure according to any one of claims 1 to 5, wherein the bead is formed above a center line of the door beam.   7. The vehicle body structure according to claim 6, wherein the bead has an equidistant section having a substantially constant distance to the fragile portion at the fragile portion side outer edge.

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