JP6538103B2 - Body floor structure - Google Patents

Description

  The present invention relates to a vehicle body floor structure of a vehicle such as a car.

  In a vehicle provided with a slide door, there is known a technology in which a cover member is provided on the inner side in the vehicle width direction of the side sill and the slide rail is accommodated in the cover member (see, for example, Patent Document 1).

JP 2008-13129 A

  When an excessive load input, such as a side collision, is applied to the cover member, a shear load may concentrate on the welded portion of the cover member and the welded portion may be peeled off. In particular, in the structure in which the cover member is welded to the floor panel via the joining flange and the fuel tank is disposed inside the cover member in the vehicle width direction, excessive load input to the cover member in the vehicle width direction is If so, the welded portion of the joint flange may be sheared and peeled off, and the joint flange may interfere with the fuel tank.

  The present invention is created to solve such problems, and in a vehicle floor structure in which mounting parts are attached to a floor panel by welding, suppression of peeling of a welded portion due to excessive load input is intended. The purpose is

In order to solve the above-mentioned subject, the present invention is a car body floor structure where mounting parts were attached to a floor panel by welding, and the mounting parts are applied to the floor panel to form a first plurality of welds. and a horizontal-shaped second joint flange forming the first joint flange and the second plurality welds horizontally shaped that, wherein the first joining flange and the second joining flange, the load of predetermined lateral In the cross direction with the input direction, the weak portions are disposed to sandwich each other, and in the weak portion, the base end side of the first joint flange and the base end side of the second joint flange intersect and the load input direction And a curved corner portion of the mounting component formed at a position that is convex toward the end.

  ADVANTAGE OF THE INVENTION According to this invention, peeling of the welding part resulting from excessive load input can be suppressed regarding the attachment attached to the floor panel by welding.

It is the bottom view which looked at the vehicle body concerning the embodiment of the present invention from the bottom. It is a bottom view of a cover member. It is a bottom view around a corner of a front cover member. It is an exploded perspective view of a cover member. It is an AA sectional view in Drawing 2, and (a) and (b) show the state before modification, and the modification, respectively. It is an external appearance perspective view at the time of looking up at a cover member from the downward direction. It is an external appearance perspective view of a cover member and a reinforcement bracket. It is a top view of a cover member and a reinforcement bracket.

  Embodiments of the present invention will be described with reference to the drawings as appropriate. In each of the drawings, "front and rear" means the front and rear direction of the vehicle, "left and right" means the vehicle width direction (left and right direction), and "upper and lower" mean the vertical up and down direction.

  In FIG. 1, a vehicle body 31 is a vehicle body of a vehicle provided with a slide door (not shown), and a pair of left and right side sills 32, 32 extending in the vehicle longitudinal direction, a floor panel 33, and a floor panel 33. It comprises a front cross member 34 and a rear cross member 35 disposed on the lower surface and extending in the vehicle width direction, and a cover member (attachment member) 1 for housing a slide rail (not shown). A fuel tank (interference-free component) 36 is disposed between the front cross member 34 and the rear cross member 35. The fuel tank 36 is disposed to the right of the vehicle width center of the vehicle body 31.

  The floor panel 33 is formed of a flat plate-like member stretched between a pair of left and right side sills 32, 32. As shown in FIG. 4, the side sill 32 includes a side surface 32A extending substantially vertically, and an upper surface 32B and a lower surface 32C extending from the upper end and the lower end of the side surface 32A respectively, and an upper surface 32B and a lower surface. An upper flange portion 32D and a lower flange portion 32E which respectively extend upward and downward from the outer ends of the portion 32C are formed. That is, generally, the side sill 32 has a substantially hat-shaped cross section that is open toward the outer side in the vehicle width direction. The side panel of the floor panel 33 is joined to the upper surface 32 B of the side sill 32 by welding.

"Cover member 1"
Inside the cover member 1 is housed a slide rail for guiding the sliding operation of the slide door. An opening 37 (FIG. 4) elongated in the front-rear direction is formed in the side surface 32A of the side sill 32, and an arm provided on the slide door is connected to the slide rail through the opening 37. As shown in FIG. 1, the fuel tank 36 is located inside the cover member 1 in the vehicle width direction. As described above, since the fuel tank 36 is disposed to the right of the vehicle width center of the vehicle body 31, the cover member 1 on the right side is closer to the fuel tank 36 than the left side. Below, the case where this invention is applied to the cover member 1 of the right side is demonstrated.

"Front cover member 2"
As shown in FIG. 6, the cover member 1 has a box shape that is attached across the floor panel 33 and the side surface portion 32A and the lower surface portion 32C of the side sill 32. As shown in FIG. 4, the cover member 1 of the present embodiment is configured to be divided into a front cover member 2 closer to the front of the vehicle and a rear cover member 3 closer to the rear of the vehicle. Furthermore, the front cover member 2 is configured to include the side surface cover member 4 and the bottom surface cover member 5.

  With reference to FIGS. 2 and 4, side cover member 4 extends from the front in the vehicle width direction of the front surface 6 to the front in the vehicle width direction of the front surface 6 extending in a forward direction toward the outside in the vehicle width direction. And a side portion 7 extending rearward along the direction. The side surface portion 7 extends so as to incline slightly outward in the vehicle width direction as it goes downward. A curved corner portion 8 is formed between the front surface portion 6 and the side surface portion 7. At the outer end in the vehicle width direction of the front face portion 6, a joining flange 9 which extends forward and is joined by welding to the side face portion 32A of the side sill 32 is formed.

  The bottom cover member 5 includes a substantially rectangular bottom portion 10 extending horizontally, a junction flange 11 rising from the front edge of the bottom portion 10, and a junction flange 12 rising from the inner edge of the bottom portion 10 in the vehicle width direction. ing. The bottom cover member 5 is integrated with the side cover member 4 by joining the joining flanges 11 and 12 to the lower ends of the front face portion 6 and the side face portion 7 and welding them together. The vehicle width direction outside of the bottom portion 10 is applied to the lower surface portion 32C of the side sill 32 and joined by welding.

"First joint flange 15, second joint flange 16"
The side cover member 4 is applied to the lower surface of the floor panel 33 to form a first plurality of welds 13 and a second joint flange 16 to form a second plurality of welds 14; have. The first joint flange 15 and the second joint flange 16 are disposed to sandwich the fragile portion 17 with each other in a direction intersecting with a predetermined load input direction P (FIG. 3). In the present embodiment, the “predetermined load input direction P” is a “direction inward in the vehicle width direction” due to a side collision or the like of the vehicle. Therefore, the first joint flange 15 and the second joint flange 16 are disposed sandwiching the fragile portion 17 with each other in the vehicle front-rear direction which is the cross direction with this.

  The first joining flange 15 is formed to horizontally extend forward from the upper edge of the front face portion 6, and the second joining flange 16 is extended horizontally inward in the vehicle width direction from the upper edge of the side face portion 7. It is formed. The first joining flange 15 is located on the inner side of the front surface 6 in the vehicle width direction, that is, the first side 15A extending substantially orthogonal to the front surface 6 from the corner 8 and the front surface from the outer surface near the vehicle width direction A second side 15B extending substantially orthogonal to the portion 6, and a tip side 15C connecting the tips of the first side 15A and the second side 15B are provided. The first side 15A is longer than the second side 15B. Therefore, the tip side 15C extends in an inclined manner with respect to the upper edge of the front face portion 6.

  The second joint flange 16 extends substantially in a direction perpendicular to the side surface 7 from the side forward of the side surface 7, ie, from the side near the corner 8, and the side surface 7 substantially from the side rearward of the vehicle A second side 16B extending orthogonally, and a tip side 16C connecting the tips of the first side 16A and the second side 16B are provided. The first side 16A is longer than the second side 16B. The tip side 16C extends in an inclined manner from the first side 16A to the second side 16B, extends from there in parallel with the upper edge of the side portion 7 and reaches the second side 16B.

"Vulnerable Part 17"
The fragile portion 17 is formed of a curved corner portion 8 formed between the front surface portion 6 and the side surface portion 7. The corner portion 8 is formed at a position having a convex shape in the load input direction P. Here, the first joint flange 15 and the second joint flange 16 disposed so as to sandwich the corner portion 8 will be considered. In FIG. 3, temporarily, the first side 15A of the first joint flange 15 is formed to extend near the apex 18 of the corner portion 8 as shown by the imaginary line 15Aa, or the second side of the second joint flange 16 When the 1 side 16A is extended to the vicinity of the apex 18 as shown by an imaginary line 16Aa, the desired deformation at the corner portion 8 corresponds to the first joint flange 15 or the second joint flange for a predetermined load input. It may be suppressed by In that case, an excessive shear load may be applied to the first plurality of welds 13 and the second plurality of welds 14 without sufficient absorption of impact energy due to the deformation of the corner portion 8. When the first plurality of welds 13 and the second plurality of welds 14 peel off, the first joint flange 15 and the second joint flange 16 may interfere with the fuel tank 36.

  On the other hand, the first joint flange 15 is formed so that the first side 15A extends from a position out of the bending range of the corner portion 8, for example, a position separating the straight portion L1 from the corner portion 8 If the second joint flange 16 is formed such that the first side 16A extends from the position separated by the straight portion L2 from the point # 8, the influence of the first joint flange 15 and the second joint flange 16 on a predetermined load input is obtained. It is possible to obtain a desired amount of deformation, that is, a fragile function at the corner portion 8 without receiving much. As a result, the periphery of the corner portion 8 is effectively deformed as shown by the broken line 19 to absorb impact energy, and the shear load is dispersed to the first plurality of welds 13 and the second plurality of welds 14 accordingly. Thus, it is possible to reduce the load of excessive shear load on the welded portion of the cover member 1 and to prevent peeling.

"First multiple welds 13, second multiple welds 14"
At least three welds of each of the first plurality of welds 13 and the second plurality of welds 14 are arranged in a triangular shape. The first plurality of welds 13 are welds 13A and 13B positioned equidistant from the upper edge of the front face 6 near the first side 15A and the second side 15B, and the first side 15A. And a welding portion 13C positioned closer to the tip. The welds 13A to 13C are arranged in a triangular shape, as can be seen from the imaginary lines 20 connecting the welds 13A to 13C to one another. Similarly, in the second plurality of welds 14, welds 14A and 14B positioned at equal distances from the upper edge of the side surface 7 near the first side 16A and the second side 16B, respectively, and the first side And a welding portion 14C located closer to the tip of the side 16A. The welds 14A-14C are arranged in a triangular shape, as can be seen from the phantom lines 21 connecting the welds 14A-14C to one another. By arranging the first plurality of welds 13 and the second plurality of welds 14 in such a manner that at least three welds are arranged in a triangular shape, it is possible to disperse the shear load applied to the welds. .

  Further, the weld 13A and the weld 13C are arranged in a direction substantially orthogonal to the base end side (pointing to the upper edge of the front face 6) of the first joining flange 15. Similarly, weld portion 14A and weld portion 14C are in a relationship of being disposed along a direction substantially orthogonal to the base end side (referring to the upper edge of side surface portion 7) of second bonding flange 16. By arranging in this manner, the shear load applied to the first plurality of welds 13 and the second plurality of welds 14 is effectively dispersed, and the corner portion 8 is effectively deformed as shown by a broken line 19. be able to.

"Bead part 38"
In FIG. 2, the floor panel 33 bulges in the vertical direction and extends substantially along the outer shell of the interference inhibiting component (fuel tank 36), and a bead partially overlaps the fragile portion 17 of the cover member 1 in the vertical direction. The part 38 is formed. As shown in FIG. 1, the right side surface of the fuel tank 36 is formed with an inclined portion 36 </ b> A that inclines inward in the vehicle width direction toward the rear. The floor panel 33 between the inclined portion 36A and the side sill 32 extends generally along the inclined portion 36A, that is, inward in the width direction of the vehicle as it extends rearward, and is a downwardly bulging bead portion 38 are formed. In FIG. 2, the rear end 38A of the bead portion 38 is formed so as to be wide and then inclined slightly outward in the vehicle width direction, and also below the rear end 38A in FIG. 5 (a). As shown, the corner portions 8 constituting the fragile portion 17 are arranged to overlap.

  Since the bead portion 38 constitutes a fragile portion of the floor panel 33, by arranging the bead portion 38 and the corner portion 8 in an overlapping manner, as shown in FIG. The deformation of the floor panel 33 and the deformation of the cover member 1 at the corner portion 8 can be simultaneously generated. Therefore, positional deviation of the first joint flange 15 and the second joint flange 16 with respect to the floor panel 33 is less likely to occur, and an excessive shear load is less likely to be applied to the first plurality of welds 13 and the second plurality of welds 14. Become.

"Rear cover member 3"
In FIG. 2, FIG. 4 and FIG. 6, the rear cover member 3 extends from the lower end of the side portion 22 outward in the vehicle width direction from the lower end of the side portion 22 extending so as to incline outward in the vehicle width direction And a horizontally extending bottom portion 23. Similar to the side surface portion 7 of the front cover member 2, the side surface portion 22 of the rear cover member 3 also extends so as to be inclined slightly outward in the vehicle width direction as it goes downward. The side surface portion 22 and the side surface portion 7 of the front cover member 2 form a side surface of the entire cover member 1 by overlapping the front edge and the rear edge and joining them by welding. The bottom surface portion 23 and the bottom surface portion 10 of the front cover member 2 constitute a bottom surface of the entire cover member 1 by overlapping the front edge and the rear edge and joining them by welding.

  A joint flange 24 extending inward in the vehicle width direction and joined by welding to the lower surface of the floor panel 33 is formed at the upper edge of the side portion 22, and extends rearward at the rear edge of the side portion 22. A joint flange 25 joined by welding to the side surface portion 32A is formed. The vehicle width direction outside of the bottom portion 23 is applied to the lower surface portion 32C of the side sill 32 and joined by welding. As described above, the cover member 1 is covered with the front face 6 at the front, covered with the side faces 7 and 22 in the vehicle width direction and the rear, covered with the bottom faces 10 and 23 at the lower side, and the upper opening is the floor panel It is covered with 33, and the opening of the vehicle width direction outer side exhibits the box shape covered with the side part 32A of the side sill 32. As shown in FIG.

  The end portion of the rear cross member 35 is joined to the side surface portion 22 and the bottom surface portion 23 of the rear cover member 3 by welding. The rear cover member 3 is formed to have a tensile strength higher than that of the front cover member 2 in order to secure strength against input load such as side collision and support strength of the cross member 35. The tensile strength can be increased by making the rear cover member 3 a material having higher tensile strength than the front cover member 2 or increasing the plate thickness.

"Reinforcement bracket 26"
In FIG. 7 and FIG. 8, a center pillar 39 is provided upright on the upper surface portion 32 </ b> B of the side sill 32. Between the rear cover member 3 and the center pillar 39, a reinforcing bracket 26 extending in the vehicle width direction and connecting the center pillar 39 and the rear cross member 35 is interposed. The reinforcing bracket 26 is bent downward at a front edge and a rear edge of the base portion 26A, and a base portion 26A horizontally extending in the vehicle width direction, specifically, slightly inclined forward toward the inner side in the vehicle width direction It has a shape provided with processed reinforcing surface portions 26B and 26B, and joining flanges 26C and 26C extending from the inner end in the vehicle width direction of each reinforcing surface portion 26B and facing the side surface portion 22 of the rear cover member 3. The reinforcing bracket 26 is arranged in line with the rear cross member 35 in the vehicle width direction.

  At the lower end of the center pillar 39, a joining flange 39A joined to the upper surface portion 32B of the side sill 32 by welding is formed. The reinforcing bracket 26 is joined to the side sill 32 and the center pillar 39 by welding while being sandwiched between the upper surface 32B and the joining flange 39A, the vehicle outer end side of the base face 26A. Further, the vehicle interior end side of the base surface portion 26A is sandwiched between the floor panel 33 and the joint flange 24 of the rear cover member 3 and is joined to the floor panel 33 and the rear cover member 3 by welding. Further, the joining flanges 26C and 26C are applied to the side surface portion 22 of the rear cover member 3 and joined to the rear cover member 3 and the rear cross member 35 by welding. By providing the reinforcing bracket 26, when a load is applied to the vehicle body 31 inward in the vehicle width direction due to a side collision or the like, the reinforcing bracket 26 acts as a so-called stick and the lower end of the center pillar 39 wraps around the room. It can be suppressed.

  As described above, in the vehicle floor structure in which the attachment component (cover member 1) is attached to the floor panel 33 by welding, the attachment component is applied to the floor panel 33 to form the first plurality of welds 13 A first joint flange 15 and a second joint flange 16 forming a second plurality of welds 14, the first joint flange 15 and the second joint flange 16 are in the cross direction with a predetermined load input direction, In the embodiment, in the configuration in which the weak portions 17 are disposed in the front-rear direction of the vehicle orthogonal to the load input direction P, the following effects can be obtained.

  Since the first plurality of welds 13 and the second plurality of welds 14 are arranged along the intersecting direction of the load input direction P with respect to the load input in the load input direction P, the load is applied to the plurality of welds. It disperses and reduces the shear load that one weld bears. Then, the fragile portion 17 located between the first plurality of welds 13 and the second plurality of welds 14 is deformed due to its fragility, and the impact energy is absorbed by the attachment parts. The applied shear load is reduced. Thereby, shear failure of the first plurality of welds 13 and the second plurality of welds 14 can be suppressed.

  The first plurality of welds 13 or the second plurality of welds 14 are at least three welds (the welds 13A to 13C in the first plurality of welds 13 and the welds 14A in the second plurality of welds 14). If 14C) is arranged in a triangular shape, the shear load applied to the weld can be effectively dispersed, and the shear load received by one weld can be further reduced.

  The fragile portion 17 is a corner portion 8 of the mounting part, and the plurality of first plurality of welding portions 13 are arranged in a direction substantially orthogonal to the base end side (upper edge of the front surface portion 6) of the first joint flange 15. Of the plurality of welds 14A, 13C, the second plurality of welds 14 are a plurality of welds 14A, which are disposed in a direction substantially orthogonal to the base end side (the upper edge of the side face portion 7) of the second joining flange 16; If 14C is provided, the shear load applied to the first plurality of welds 13 and the second plurality of welds 14 can be dispersed, and the corners 8 can be effectively deformed.

  The fragile portion 17 has a curved corner portion 8 in which the base end side (upper edge of the front surface portion 6) of the first bonding flange 15 and the base end side (upper edge of the side surface portion 7) of the second bonding flange 16 intersect. If the first joint flange 15 and the second joint flange 16 are formed at a position out of the bending range of the corner portion 8, the influence of the first joint flange 15 and the second joint flange 16 is A desired amount of deformation can be easily obtained at the corner portion 8 without receiving much.

  In the floor panel 33, when the bead portion 38 in which the bulging part overlaps the weak portion 17 in the vertical direction is formed, deformation of the floor panel 33 in the bead 38 with respect to the load input; At the same time, deformation of the attachment at the corner portion 8 can occur. Therefore, positional deviation of the first joint flange 15 and the second joint flange 16 with respect to the floor panel 33 is less likely to occur, and an excessive shear load is less likely to be applied to the first plurality of welds 13 and the second plurality of welds 14. Become.

  The mounting part is the cover member 1 for covering the slide rail, and the cover member 1 has a box shape attached across the floor panel 33 and the side surface 32A and the lower surface 32C of the side sill 32. Since a closed cross-sectional structure is formed in a direction view, the strength against an input load such as a side collision can be enhanced.

  The cover member 1 is divided into a front cover member 2 closer to the vehicle front and a rear cover member 3 closer to the vehicle, and the rear cover member 3 is formed to have a higher tensile strength than the front cover member 2 and a rear cross With the configuration connected to the member 35, the strength against the input load such as a side collision and the support strength of the cross member 35 can be enhanced.

  If a reinforcing bracket 26 extending in the vehicle width direction and connecting the center pillar 39 and the rear cross member 35 is interposed between the rear cover member 3 and the center pillar 39, a side collision or the like is caused. When a load is applied to the vehicle body 31 inward in the vehicle width direction, the reinforcing bracket 26 plays the role of a so-called contact bar, and it is possible to suppress the lower end of the center pillar 39 from coming around indoors.

  The preferred embodiments of the present invention have been described above. In the embodiment, the present invention is applied to the cover member 1 on the right side of the vehicle, but may be applied to the cover member on the left side of the vehicle. Further, as the front cover member 2, the side surface cover member 4 and the bottom surface cover member 5 may be integrally formed. Furthermore, the attachment to which the invention is applied may be a component attached to the top surface of the floor panel 33.

1 Cover member (attachment parts)
2 front cover member 3 rear cover member 4 side cover member 5 bottom cover member 6 front portion 7 side portion 8 corner portion 10 bottom portion 13 first plurality of welds 14 second plurality of welds 15 first joint flange 16 second Joint flange 17 fragile part 22 side part 23 bottom part 26 reinforcement bracket 31 vehicle body 32 side sill 33 floor panel 35 rear cross member 36 fuel tank (interference prohibited parts)
38 bead 39 center pillar

Claims (8)

A vehicle floor structure in which mounting parts are attached to a floor panel by welding,
The mounting part has a horizontal first joint flange which is applied to the floor panel to form a first plurality of welds and a horizontal second joint flange which forms a second plurality of welds. ,
The first joint flange and the second joint flange are disposed to sandwich the weak portion in a cross direction with a predetermined lateral load input direction ,
The fragile portion is a curve of the attachment part formed at a position where the base end side of the first joint flange and the base end side of the second joint flange intersect and form a convex shape in the load input direction. A car body floor structure characterized by the shape of a corner portion .   The vehicle body floor structure according to claim 1, wherein at least three welds of the first plurality of welds or the second plurality of welds are arranged in a triangular shape. Before the first plurality welds SL includes a plurality of weld which is disposed substantially perpendicular to the direction of the base end side of the first joining flange,
The second plurality of welds according to claim 1 or 2, characterized in that the plurality of welds are arranged in a direction substantially orthogonal to the base end side of the second joining flange. Body floor structure. Before Symbol first joint flange and the second joining flange, the body according to any one of claims 1 to 3, characterized in that it is formed at a position deviated from the bending range of the corner portion Floor structure. A vehicle floor structure in which mounting parts are attached to a floor panel by welding,
The mounting component has a first joint flange that is applied to the floor panel to form a first plurality of welds and a second joint flange that forms a second plurality of welds.
The first joint flange and the second joint flange are disposed to sandwich the weak portion in a cross direction with a predetermined load input direction,
In the floor panel,
A vehicle floor structure characterized in that a bead portion is formed in which a portion which is expanded in the up and down direction overlaps with the fragile portion in the up and down direction. A vehicle floor structure in which mounting parts are attached to a floor panel by welding,
The mounting component has a first joint flange that is applied to the floor panel to form a first plurality of welds and a second joint flange that forms a second plurality of welds.
The first joint flange and the second joint flange are disposed to sandwich the weak portion in a cross direction with a predetermined load input direction,
The vehicle floor structure according to claim 1, wherein the mounting part is a cover member for covering a slide rail, and has a box shape attached across the floor panel and the side surface and the lower surface of the side sill. The cover member is divided into a front cover member near the vehicle front and a rear cover member near the vehicle rear,
The vehicle body floor structure according to claim 6, wherein the rear cover member is formed to have higher tensile strength than the front cover member and is connected to the cross member.   8. The vehicle body according to claim 7, wherein a reinforcing bracket extending in the vehicle width direction and connecting the center pillar and the cross member is interposed between the rear cover member and the center pillar. Floor structure.

Images