JP6421534B2 - Vehicle floor structure - Google Patents

Description

  The present invention relates to a vehicle floor structure having a reinforcing member that suppresses lifting of a floor surface of a passenger compartment at the time of a frontal collision of the vehicle.

  When a vehicle collides forward, the energy of the collision is absorbed by deforming a part of the frame of the vehicle body or transmitting the collision load to the frame and dispersing it.

  According to the vehicle body lower part structure described in Patent Document 1, the left and right front side members are bent obliquely rearwardly outside the vehicle at the position of the dash panel and coupled to the rocker rails along the left and right side edges of the passenger compartment floor. In addition, a reinforcing member bent so as to extend in parallel with the rocker rail at substantially the same position as the front side member is coupled to the rocker rail extending obliquely rearward from the bent portion of the front side member in the traveling direction of the vehicle. I have. The reinforcing member has an inverted hat-shaped cross-sectional shape, and the upper edge of the side wall on the outer side of the vehicle is coupled to the lower surface of the floor panel, and the upper edge of the side wall on the inner side of the vehicle is coupled to the inner side wall of the tunnel portion to form a closed cross section. ing. By having such a structure, in the event of a frontal collision of the vehicle, for example, when the right front part of the vehicle has an offset collision, the collision load is applied to the rocker rail side and the reinforcing member side at the bent part of the front side member. The impact load is distributed to increase the rigidity of the vehicle body substructure.

  Further, the vehicle floor structure described in Patent Document 2 is applied to a vehicle in which a battery such as a hybrid vehicle or an electric vehicle is mounted on the vehicle body floor. In this vehicle floor structure, in order to suppress deformation of the vehicle body by an inertial force that acts forward on the battery in the event of a forward collision, a tunnel frame member that supports a load acting on the front of the vehicle body on both sides in the vehicle width direction of the tunnel portion. Is provided.

JP 2001-219873 A JP 2007-320341 A

  By the way, especially in the case of an offset collision among the front collisions, a shear load acting in the traveling direction of the vehicle is applied to the tunnel portion between the right side and the left side. As a result, the floor panel is twisted, and wrinkles may be generated or the floor panel may be lifted. When the floor panel is lifted, the seat fixed on the floor panel is also lifted, and the passenger sitting on the seat gives a shock of being pushed up and a feeling of fear that the interior space is crushed.

  However, when a reinforcing member is newly provided to prevent the floor panel from being lifted, the reinforcing member cannot be joined at a desired position in relation to the joint location of the other reinforcing member, or there is an existing reinforcing member, It is difficult to add a reinforcing member such as changing the joining position of other members or changing the assembly order, such as it is difficult to secure a transmission path.

  Therefore, the present invention provides a vehicle floor structure that can reduce lifting caused by an offset collision by adding a reinforcing member without greatly changing an existing reinforcing member.

A vehicle floor structure according to an embodiment of the present invention includes a tunnel portion, a front floor, a kick-up portion, a rear floor, a pair of lower reinforcing members, and an upper reinforcing member . A tunnel part is arrange | positioned in the center along the advancing direction of a vehicle. The front floor extends to both sides of the tunnel. The kick-up portion is formed continuously at the tunnel portion and the rear end of the front floor. The rear floor extends backward from the kick-up section. The lower reinforcing members are joined to the lower surface in a range continuous from the tunnel portion to the front floor, and are arranged in a pair so as to approach each other in the vehicle width direction toward the kick-up portion. The upper reinforcing member is joined to the upper surface in a range from the rear end of the lower reinforcing member to the front end of the rear floor, and connects the rear ends of the pair of lower reinforcing members.

The rear ends of the pair of lower reinforcing members and the front ends of the upper reinforcing members are spot-welded at least at one place on a three-layer stack sandwiching the tunnel portion and the front floor .

The tunnel reinforcing member further includes a tunnel reinforcing member that covers the upper portion of the tunnel portion up to a position overlapping the upper edge of the lower reinforcing member. The tunnel reinforcing member has both outer edges along the traveling direction of the vehicle with respect to the upper edge of the lower reinforcing member. Spot welding is performed in at least one place on each of the three sheets with the tunnel portion interposed therebetween .

The vehicle floor structure may further include a corner reinforcing member and a lower bracket. The corner reinforcing member is arranged in a continuous range across the front floor, the kick-up portion, and the side floor where the front floor extends so as to wrap around the outside of the kick-up portion. The lower bracket includes a lower bracket disposed along the kick-up portion between the lower surface of the front floor provided with the corner reinforcing member and the inner side surface of the side sill depending from the outer edge of the side floor .

  According to the vehicle floor structure of the present invention, the lower reinforcing members connected to the tunnel portion and the front floor extending on both sides thereof are arranged so as to approach each other in the vehicle width direction toward the kick-up portion, that is, in a V shape. . Therefore, even when the vehicle receives a collision load biased by a forward offset collision, the rigidity of the tunnel portion is increased by the lower reinforcing member and the pair of lower reinforcing members are arranged in a V shape toward the kick-up portion. Therefore, it can suppress that the back of a front floor lifts.

  Further, according to the vehicle floor structure of the invention further including the upper reinforcing member, the upper reinforcing member is arranged so as to connect the lower reinforcing members that are close to each other in the vehicle width direction toward the kick-up portion. A collision load that is biased and input by offset collision is transmitted to the lower reinforcing member on the opposite side via the member, and the collision load on one side can be reduced. At this time, according to the vehicle floor structure of the invention in which the rear ends of the pair of lower reinforcing members and the front ends of the upper reinforcing members are spot-welded to a three-layer stack sandwiching the tunnel portion and the front floor, the lower reinforcing member and the upper reinforcing member Are directly joined to each other to further increase the rigidity.

  Further, according to the vehicle floor structure of the invention further including a tunnel reinforcing member, the outer edge portions along the vehicle traveling direction are spot-welded in three layers with the tunnel portion interposed between the upper edge of the lower reinforcing member. . The lower reinforcing members on both the left and right sides are directly joined to the tunnel reinforcing member and the pair of lower reinforcing members are integrated to increase the torsional rigidity of the tunnel portion. Therefore, even when a collision load biased due to an offset collision is input, it is possible to suppress the deformation that the front floor is lifted.

The perspective view which shows the vehicle floor structure of one Embodiment which concerns on this invention. The top view of the vehicle floor structure of FIG. Sectional drawing of the vehicle floor structure which follows the F3-F3 line | wire in FIG. Sectional drawing of the vehicle floor structure which follows the F4-F4 line | wire in FIG. The perspective view which expanded the rear end side of the tunnel part of the vehicle floor structure of FIG. The perspective view of the corner part periphery which expanded F6 part in FIG. Sectional drawing of a corner part periphery which follows the F7-F7 line | wire in FIG.

  A floor panel 1 having a vehicle floor structure according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a perspective view showing an entire floor panel 1 having a vehicle floor structure. A floor panel 1 shown in FIG. 1 has a tunnel portion 2 arranged along the traveling direction of a vehicle, and a front floor 3 spreads on both sides thereof. The floor panel 1 is provided with a kick-up portion 5 between the front floor 3 on which the front seat is installed and the rear floor 4 on which the rear seat is installed so that the rear floor 4 side becomes one step higher. The floor panel 1 absorbs an impact caused by a frontal collision, and particularly suppresses deformation of the tunnel part 2 so that the front floor 3 is lifted during an offset collision.

  A floor panel 1 shown in FIG. 1 includes a tunnel portion 2, a front floor 3, a kick-up portion 5, a rear floor 4, and a pair of lower reinforcing members 6. For convenience of description of the embodiment, “front” and “rear” based on the traveling direction of the vehicle, “right” and “left” as viewed from the occupant riding this vehicle, “up” and “lower” based on gravity. Define each. Also, “inside” and “outside” are defined in the vehicle width direction.

  FIG. 2 is a plan view of a range from the front floor 3 to the kick-up portion 5. The tunnel part 2 is arrange | positioned in the center along the advancing direction of a vehicle, as shown in FIG. FIG. 3 is a cross-sectional view of the tunnel portion 2 and the front floor 3 along the vehicle width direction. As shown in FIGS. 2 and 3, the front floor 3 is continuous with the lower edges of the left and right sides of the tunnel portion 2 and spreads on both sides. FIG. 4 is a cross-sectional view of the tunnel portion 2 and the kick-up portion 5 along the vehicle traveling direction. As shown in FIGS. 2 and 4, the kick-up portion 5 is formed continuously to the rear ends of the tunnel portion 2 and the front floor 3, and the height of the upper portion 21 of the tunnel portion 2 from the rear end of the front floor 3. The front wall 51 rising up is formed. As shown in FIGS. 1 and 4, the rear floor 4 extends rearward from the kick-up portion 5.

  Moreover, the floor panel 1 having the vehicle floor structure of the present embodiment has side sills 31 on the outer sides of the left and right front floors 3 as shown in FIG. The upper edge of each side sill 31 is joined to the outer edge of the front floor 3. Furthermore, it has the 1st cross member 32 and the 2nd cross member 33 which are extended in a pair in the vehicle width direction from the tunnel part 2 to the side sill 31, respectively.

  The first cross member 32 is disposed near the front of the front floor 3, and the second cross member 33 is disposed near the rear of the front floor 3 and between the first cross member 32 and the kick-up portion 5. . The first cross member 32 and the second cross member 33 are both joined to the upper surface of the front floor 3 and formed so as to rise from the front floor 3 as shown in FIG. The front seat is fixed using the first cross member 32 and the second cross member 33. As shown in FIG. 4, the kick-up portion 5 has a rear cross member 53 joined to the rear with a reinforcing member 52 interposed therebetween.

  As shown in FIG. 3, the lower reinforcing member 6 is a range extending from the tunnel portion 2 to the front floor 3, that is, a range extending from the left and right side walls 22 of the tunnel portion 2 to the inner end of the front floor 3 connected thereto. It is joined to the lower surface of and is provided in a pair. As shown in FIG. 2, the pair of lower reinforcing members 6 provided in a pair are arranged in a so-called “V-shape” that approaches each other in the vehicle width direction toward the kick-up portion 5. As shown in FIG. 2, the lower reinforcing member 6 extends beyond the second cross member 33 from a portion adjacent to the first cross member 32 of the front floor 3. The rear end 61 of the lower reinforcing member 6 may extend to the kick-up portion 5.

  In the vehicle floor structure of the present embodiment, the floor panel 1 further includes an upper reinforcing member 7 as shown in FIGS. 2, 4 and 5. FIG. 5 is a perspective view generally showing the periphery of the kick-up portion 5. The upper reinforcing member 7 is joined to the upper surface in the range from the rear end 61 of the lower reinforcing member 6 to the front end 41 of the rear floor 4. Specifically, on the front floor 3 where the rear end 61 of the lower reinforcing member 6 is located, the tunnel portion 2 located therebetween, the front wall 51 of the kick-up portion 5 on both sides of the tunnel portion 2, and the front end 41 of the rear floor 4 Be joined.

  At this time, the front end 71 of the upper reinforcing member 7 that overlaps the front floor 3 is spot-welded in three layers together with the rear end 61 of the lower reinforcing member 6 with the front floor 3 interposed therebetween. Accordingly, the upper reinforcing member 7 connects the pair of lower reinforcing members 6 to each other. In each figure, a spot spot-welded to three sheets is indicated by T, and a spot spot-welded to two sheets is indicated by W.

  As shown in FIGS. 1 and 2, the floor panel 1 has a tunnel reinforcing member 8 on the upper portion 21 of the tunnel portion 2. The tunnel reinforcing member 8 covers the upper portion 21 of the tunnel portion 2 to a position overlapping the upper edge 62 extending along the inside of the tunnel portion 2 of the lower reinforcing member 6. In this tunnel reinforcing member 8, the outer edge portions 81 along the traveling direction of the vehicle are spot-welded in three layers with the side wall 22 of the tunnel portion 2 sandwiched from the upper edge 62 of the lower reinforcing member 6. Is done.

  As shown in FIGS. 1, 2, and 5, the floor panel 1 having the vehicle floor structure includes a side floor 34 in which the front floor 3 extends so as to wrap around the outer sides of the kick-up portion 5, and the side floor 34. And a kick-up lateral portion 55 formed by a side wall 54 connected from the floor 34 to the rear floor 4. The kick-up part 5 and the kick-up horizontal part 55 and the front floor 3 and the side floor 34 connected to them are collectively referred to as a corner part 50.

  FIG. 6 is an enlarged perspective view of the periphery of the kick-up lateral portion 55. As shown in FIG. 6, the corner reinforcing member 11 formed so as to go from the front wall 51 of the front floor 3 and the kick-up portion 5 to the side floor 34 and the side wall 54 of the kick-up lateral portion 55 is joined to the upper surface. As shown in FIG. 6, the side sill 31 extends to the outside of the side floor 34.

  As shown in FIGS. 6 and 7, the lower bracket 12 is joined between the lower surface of the front floor 3 on which the corner reinforcing member 11 is provided and the inner side surface of the side sill 31. FIG. 7 is a cross-sectional view of the lower bracket 12 and its periphery along the vehicle width direction. The lower bracket 12 extends in a direction along the front wall 51 of the kick-up portion 5 and is attached so as to support the corner portion 50 from below. A portion where the corner reinforcing member 11 and the lower bracket 12 overlap is spot-welded in three layers with the front floor 3 and the side floor 34 interposed therebetween. Thereby, the front wall 51 of the kick-up part 5 is indirectly connected to the side sill 31. In FIG. 7, the side member 9 is shown immediately below the joint portion (three-layer overlap spot welded portion T) between the corner reinforcing member 11 and the lower bracket 12.

  According to the vehicle floor structure configured as described above, when a vehicle undergoes a forward collision, particularly an offset collision, and receives a collision load that is biased to the left or right, the lower part on the side where the collision load is input. A load is transmitted to the intersection between the tunnel portion 2 and the kick-up portion 5 through the reinforcing member 6. Since the lower reinforcing member 6 is disposed in a pair in a V shape, the lower reinforcing member 6 is also transmitted from the kick-up portion 5 to the lower reinforcing member 6 on the opposite side. As a result, the lower reinforcing member 6 may be caused by the tunnel portion 2 being twisted due to a shear load applied to the tunnel portion 2 or the front floor 3 being lifted due to the side wall 22 of the tunnel portion 2 being opened outward. Is suppressed by.

  Moreover, since the floor panel 1 having the vehicle floor structure according to the present embodiment further includes the upper reinforcing member 7, the pair of lower reinforcing members 6 arranged in a pair are integrally coupled to increase rigidity. The uneven collision load due to the offset collision is easily diffused throughout the floor panel 1. And by having the tunnel reinforcement member 8 which covered the upper part 21 of the tunnel part 2, the shear load which acts on the tunnel part 2 can be disperse | distributed to a pair of lower reinforcement member 6. FIG. At this time, the rear end 61 of the lower reinforcing member 6 is spot-welded to the front end 71 of the upper reinforcing member 7 with the front floor 3 interposed therebetween, so that the lower reinforcing member 6 and the upper reinforcing member 7 directly. Further, the lower reinforcing member 6 is spot-welded in three layers to the edge portion 81 of the tunnel reinforcing member 8 with the upper edge 62 of the lower reinforcing member 6 sandwiching the side wall 22 of the tunnel portion 2 so that the lower reinforcing member 6 is tunnel-reinforced. Directly joined to the member 8. As a result, the overall rigidity of the floor panel 1 is increased, and a biased collision load due to an offset collision is easily transmitted from one of the pair of lower reinforcing members 6 to the other, so that deformation of the floor panel 1 can be suppressed.

  Further, since the vehicle floor structure of this embodiment includes the corner reinforcing member 11 and the lower bracket 12, the lower reinforcing member 6 on one side of the lower reinforcing member 6 arranged in a V shape obliquely moves to the kick-up portion 5. The transmitted vehicle load direction component of the collision load is transmitted from the kick-up portion 5 to the side sill 31 via the corner reinforcing member 11 and the lower bracket 12. At this time, the corner reinforcing member 11 and the lower bracket 12 are spot-welded in a three-layer manner with the front floor 3 and the side floor 34 interposed therebetween, so that the collision load input to the kick-up portion 5 can be easily transmitted. As a result, the rigidity of the floor panel 1 is further increased.

  The floor panel 1 having the vehicle floor structure according to the embodiment of the present invention has been described above. In the present embodiment, by having the lower reinforcing member 6, the rigidity of the floor panel 1 is increased, and deformation such that the front floor 3 is lifted can be prevented. The upper reinforcing member 7, the tunnel reinforcing member 8, the corner reinforcing member 11, and the lower bracket 12 further enhance the effect provided by the lower reinforcing member 6. The addition of reinforcing members other than those described above does not change the essence of the present invention.

  DESCRIPTION OF SYMBOLS 1 ... Floor panel (with vehicle floor structure), 2 ... Tunnel part, 21 ... Upper part, 22 ... Side wall, 3 ... Front floor, 4 ... Rear floor, 5 ... Kick-up part, 55 ... Kick-up side part, 6 ... Lower reinforcing member, 61 ... rear end, 62 ... upper edge, 7 ... upper reinforcing member, 71 ... front end, 8 ... tunnel reinforcing member, 81 ... edge

Claims (4)

A tunnel portion arranged in the center along the traveling direction of the vehicle,
A front floor extending to both sides of the tunnel,
A kick-up portion formed continuously at a rear end of the tunnel portion and the front floor;
A rear floor extending rearward from the kick-up portion;
The joined from the tunnel portion on the lower surface of a continuous range to the front floor, and a pair of lower reinforcing member disposed so as to approach each other in the vehicle width direction toward the free kick-up portion,
An upper reinforcing member joined to an upper surface in a range from a rear end of the lower reinforcing member to a front end of the rear floor, and connecting the rear ends of the pair of lower reinforcing members to each other;
Vehicle floor structure, wherein Rukoto equipped with. The front end of the upper reinforcement member and the rear end of the lower reinforcing member according to claim 1, characterized in that it is spot welded at at least one location in a three-ply sandwiching the tunnel portion and the front floor Vehicle floor structure. A tunnel reinforcing member that covers the upper portion of the tunnel portion to a position overlapping the upper edge of the lower reinforcing member;
The tunnel reinforcing member is spot-welded at least at one position in each of three overlapping layers with the tunnel portion sandwiched between the outer edges along the traveling direction of the vehicle and the upper edge of the lower reinforcing member vehicle floor structure according to claim 1 or claim 2, characterized in. A corner reinforcing member disposed in a continuous range across the front floor, the kick-up portion, and a side floor to which the front floor extends so as to wrap around the outside of the kick-up portion;
A lower bracket disposed along the kick-up portion between a lower surface of the front floor provided with the corner reinforcing member and an inner side surface of a side sill hanging from an outer edge of the side floor.
The vehicle floor structure according to any one of claims 1 to 3, wherein:

Images