JP2009286331A - Vehicle body skeleton structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a vehicle body skeleton structure capable of preventing or suppressing deformation of a connection part between a reinforcement and a locker at a front side collision. <P>SOLUTION: A rear end side of an under reinforcement 48 is connected to a locker 30, and a rear end 52A side of an upper reinforcement 52 is connected to the locker 30 through a vehicle below side of a first floor cross member 64. Further, a mating part 22A of the floor panel 20, a top wall part 58 at the rear end 52A of the upper reinforcement 52, and right and left flange parts 66A, 66B of the first floor cross member 64 are connected to be overlapped one another. Thus, three parts, the floor panel 20, the upper reinforcement 52 and the first floor cross member 64, are tightly connected. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle body skeleton structure including a reinforcement capable of supporting a load from a vehicle front side inputted to a front side member.

In the vehicle body frame structure, a reinforcement capable of supporting the load input from the front bumper to the front side member is coupled to one side (front side or back side) of the floor panel, and the rear end of the reinforcement is a rocker. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 9-254818

  However, in such a structure, a local load acts on the joint between the reinforcement and the rocker at the time of a frontal collision. For this reason, the said prior art has room for improvement from a viewpoint of preventing or suppressing the deformation | transformation of the coupling | bond part of the reinforcement and the rocker at the time of a frontal collision.

  In view of the above facts, an object of the present invention is to obtain a vehicle body skeleton structure capable of preventing or suppressing deformation of a joint portion between a reinforcement and a rocker at the time of a frontal collision.

  The vehicle body skeleton structure according to the first aspect of the present invention includes a rocker disposed on both sides of a vehicle floor in the vehicle width direction with the vehicle longitudinal direction as a longitudinal direction, and a front side member disposed on both sides of the front portion of the vehicle body. A front end side is provided on the end side, extends outward in the vehicle width direction toward the vehicle rear side, and is coupled to the lower surface side of the vehicle body floor, and a rear end side is coupled to the rocker, and the front side member The underreinforce that can support the load from the front side of the vehicle that is input to the vehicle and the underreinforce with the vehicle body floor sandwiched therebetween are arranged along the extending direction of the underreinforce in a plan view of the vehicle. An upper reinforcement which is coupled to the upper surface side of the vehicle body floor and whose rear end portion is coupled to the rocker; and an upper surface side of the vehicle body floor A cross member which is coupled and disposed with the vehicle width direction as a longitudinal direction, and an end portion disposed on the rocker side is positioned on the vehicle upper side of the upper reinforcement and is coupled to the upper surface side of the upper reinforcement and the rocker Have.

  According to the vehicle body skeleton structure of the present invention described in claim 1, the under-reinforcement is provided with the front end portion side on the rear end portion side of the front side member and extends outward in the vehicle width direction toward the vehicle rear side. It is connected to the lower surface side of the car body floor and the rear end side is connected to the rocker, and the load from the front side of the vehicle that is input to the front side member is supported by this under reinforcement and the connection between the under reinforcement and the rocker Transmitted to the department.

  Here, the upper reinforcement disposed opposite to the underreinforce with the vehicle body floor interposed therebetween extends along the extending direction of the underreinforce in a plan view of the vehicle and is coupled to the upper surface side of the vehicle body floor and the rear end portion. Since the side is coupled to the rocker, part of the load input to the front side member is transmitted from the upper reinforcement to the rocker. Thus, the rocker supports the load in a range including not only the joint portion with the under reinforcement but also the joint portion with the upper reinforcement. Further, the cross member is coupled to the upper surface side of the vehicle body floor and arranged with the vehicle width direction as the longitudinal direction, and the end portion arranged on the rocker side of the cross member is positioned on the upper reinforcement vehicle side so that the upper reinforcement Since it is coupled to the upper surface side and the rocker, the periphery of the coupling portion between the upper reinforcement and the rocker is firmly coupled. For this reason, the load transmitted from the upper reinforcement to the rocker is stably supported at the joint between the upper reinforcement and the rocker.

  A vehicle body skeleton structure according to a second aspect of the present invention has the reinforcing member fixed in the rocker in the configuration according to the first aspect, and the reinforcing member has a longitudinal direction of the rocker in a vehicle plan view. A first vertical wall portion that is disposed along a direction intersecting with the rocker and is in contact with an inner wall portion on the inner side in the vehicle width direction of the rocker, and is located on the inner wall portion side at a rear end portion of the upper reinforcement. The 2nd vertical wall part arrange | positioned in series with respect to the said 1st vertical wall part is provided in the vehicle width direction inside of the said 1st vertical wall part.

  According to the vehicle body skeleton structure of the present invention described in claim 2, the reinforcing member is fixed in the rocker, and the first vertical wall portion of the reinforcing member is along the direction intersecting the longitudinal direction of the rocker in a plan view of the vehicle. It is arranged and is in contact with the inner wall portion of the rocker on the inner side in the vehicle width direction, and at the rear end portion of the upper reinforcement, the first vertical wall portion is located on the inner wall portion side and on the inner side in the vehicle width direction of the first vertical wall portion Since the second vertical wall portion arranged in series with respect to the front is collided, from the second vertical wall portion of the upper reinforcement to the first vertical wall portion of the reinforcing member via the inner wall portion of the rocker at the time of a frontal collision A part of the load is transmitted, and the load is more dispersed. At this time, the position where the load is applied from the second vertical wall portion of the upper reinforcement to the inner wall portion of the rocker is opposed to the position where the load by the first vertical wall portion of the reinforcing member is supported. Even if a load acts on the inner wall portion of the rocker from the vertical wall portion, local deformation of the inner wall portion of the rocker is effectively prevented or suppressed.

  A vehicle body skeleton structure according to a third aspect of the present invention is the structure according to the first or second aspect, wherein the vehicle body floor projects upwardly along the shape of the rear end portion of the upper reinforcement. In addition, an overlapping portion is provided on the vehicle lower side of the rear end portion of the upper reinforcement, and the alignment portion of the vehicle body floor, the rear end portion of the upper reinforcement, and the cross member are in a three-ply state. Combined.

  According to the vehicle body skeleton structure of the present invention described in claim 3, the vehicle body floor protrudes toward the vehicle upper side along the shape of the rear end portion of the upper reinforcement, and the mating portion is below the vehicle at the rear end portion of the upper reinforcement. The three parts of the vehicle floor, upper reinforcement, and cross member are connected to each other. Tightly coupled. For this reason, when a load is transmitted from the upper reinforcement to the rocker at the time of a frontal collision, deformation around the joint portion between the upper reinforcement and the rocker is more effectively prevented or suppressed, and the load is supported more stably. .

  As described above, according to the vehicle body skeleton structure according to claim 1 of the present invention, it is possible to prevent or suppress the deformation of the joint portion between the under reinforcement and the rocker at the time of a frontal collision. Have.

  The vehicle body skeleton structure according to claim 2 has an excellent effect that the local deformation of the inner wall portion of the rocker can be more effectively prevented or suppressed at the time of a frontal collision.

  According to the vehicle body skeleton structure according to claim 3, the three parts of the vehicle body floor, the upper reinforcement, and the cross member can be firmly coupled, and the load is further increased at the coupling portion between the upper reinforcement and the rocker at the time of a frontal collision. As a result, it is possible to stably support, and as a result, there is an excellent effect that deformation of the joint portion between the under reinforcement and the rocker can be more effectively prevented or suppressed.

(Configuration of the embodiment)
A vehicle body skeleton structure according to an embodiment of the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow IN indicates the vehicle width direction inner side.

  FIG. 1 is a plan view schematically showing the entire structure of the vehicle body skeleton structure. As shown in FIG. 1, the engine room 10 and the cabin 12 are separated by a dash panel 14. The upper portion of the dash panel 14 is a vertical plate portion 16 formed in a substantially vertical plate shape, and the lower portion of the dash panel 14 is integrally formed with the vertical plate portion 16 and formed in an inclined plate shape. It is a toe board section 18. The toe board portion 18 is inclined to the lower rear side of the vehicle (toward the lower side of the vehicle toward the rear of the vehicle). A lower end portion of the toe board portion 18 is joined and integrated with a front end portion of a floor panel 20 as a vehicle body floor by spot welding or the like. The floor panel 20 constitutes the bottom of the cabin 12.

  A series of tunnel portions 24 are provided in the center portion of the dash panel 14 and the floor panel 20 in the approximate vehicle width direction with the longitudinal direction of the vehicle in the longitudinal direction. The tunnel portion 24 is formed in a tunnel shape and reinforces the lower portion of the vehicle body.

  Rocker 30 (also referred to as a side sill, which is an element grasped in the broad sense as a “vehicle longitudinal direction skeleton member”) is provided on both sides of the floor panel 20 in the vehicle width direction, that is, at the lower end of the vehicle body side portion 28. The direction is set as the longitudinal direction. As shown in FIG. 2, the rocker 30 includes a rocker outer panel 32 disposed on the vehicle width direction outer side (vehicle compartment outer side) and a rocker inner panel 34 disposed on the vehicle width direction inner side (vehicle interior side). It is configured to include.

  The rocker outer panel 32 is formed in a substantially hat-shaped cross-section with the inner side in the vehicle width direction opened, and the rocker inner panel 34 is formed in a substantially hat-shaped cross-section with the outer side in the vehicle width direction opened. 34B and the bottom wall portion 34C are arranged so as to protrude inward in the vehicle width direction. The rocker outer panel 32 and the rocker inner panel 34 form a closed cross-sectional structure having a closed cross-sectional portion 30A by joining a pair of upper and lower flange portions 32A and 34D. On the inner wall 34B of the rocker 30 (the rocker inner panel 34) on the inner side in the vehicle width direction, a terminal portion (not shown) on the outer side in the vehicle width direction of the toe board portion 18 and a terminal portion 20C on the outer side in the vehicle width direction of the floor panel 20 They are joined by spot welding in a state of being bent upward.

  As shown in FIG. 1, a pair of left and right front side members 42 are arranged with the vehicle longitudinal direction as a longitudinal direction on both sides of the engine room 10 separated by the dash panel 14, that is, both sides of the vehicle body front portion 40. ing. The front end portions of the pair of left and right front side members 42 are connected to each other by a front bumper reinforcement 46 arranged with the vehicle width direction as a longitudinal direction. The front bumper reinforcement 46 is a long member with high strength that constitutes a part of the front bumper 44.

  The rear end portion 42A of the front side member 42 is coupled to the upper portion of the vehicle compartment outer surface 18A of the toe board portion 18 of the dash panel 14 (see FIG. 2, the front surface on the engine room 10 side) by spot welding or the like. A front end 48A of an under reinforcement 48 is coupled to the rear end 42A of the front side member 42 by spot welding or the like. The under-reinforce 48 extends outward in the vehicle width direction toward the rear side of the vehicle, and as shown in FIG. 2, the under-reinforce 48 is formed in a generally hat shape with the upper side of the vehicle open, and the left and right flange portions are toe boards. As shown in FIG. 4 which is an enlarged cross-sectional view taken along line 4-4 of FIG. 2 while being coupled to the passenger compartment outer surface 18A side of the portion 18 and the lower surface 20A side of the floor panel 20 by welding or the like. The portion 48B side is coupled to the rocker inner panel 34 (rocker 30).

  Accordingly, the under-reinforce 48 shown in FIG. 2 can support the load F (see FIG. 1) input to the front side member 42 (see FIG. 1) from the front side of the vehicle. The floor panel 20 and the under-reinforce 48 form a closed cross-sectional structure having a closed cross-sectional portion 50. In the present embodiment, as shown in FIG. 3 which is a partially broken view shown in FIG. 2 and an enlarged cross-sectional view taken along line 3-3 in FIG. At the position, a reinforcement reinforcement 49 is disposed on the under reinforcement 48 side.

  As shown in FIG. 2, an upper reinforcement 52 is disposed opposite to the under reinforcement 48 with the floor panel 20 interposed therebetween. The upper reinforcement 52 extends along the extending direction of the under reinforcement 48 in a plan view of the vehicle (see FIG. 1), is formed in a generally hat shape in cross section with the vehicle lower side open, and has a pair of left and right side walls. The portions 56A and 56B and the top wall portion 58 project in a convex shape toward the upper side of the vehicle, and the left and right flange portions 54A and 54B are on the vehicle interior surface 18B (rear surface on the cabin 12 side) side of the toe board portion 18 and the floor panel. 20 is joined to the upper surface 20B side by welding or the like. That is, the toe board portion 18, the floor panel 20, and the upper reinforcement 52 form a closed section structure including the closed section portion 62.

  In the rear end portion 52A of the upper reinforcement 52, the right side wall portion 56B is bent outward in the vehicle width direction and is a rear end vertical wall as a second vertical wall portion disposed along the vehicle width direction. Part 156 is provided. The rear end vertical wall portion 156 is located on the inner wall portion 34B side of the rocker 30 (rocker inner panel 34), and its general surface is a surface including the vehicle vertical direction and the vehicle width direction (see FIG. 5). . Further, a rear end flange portion 60 is formed at the end of the rear end portion 52A of the upper reinforcement 52 and is bent toward the vehicle upper side. As shown in FIG. 4, the rear end flange portion 60 is welded to the end portion 20 </ b> C of the floor panel 20 and the inner wall portion 34 </ b> B of the rocker inner panel 34 in a three-layered state, and is attached to the rocker 30 (the rocker inner panel 34). Are combined.

  Further, as shown in FIG. 3, the floor panel 20 located on the vehicle lower side of the upper reinforcement 52 has a convex portion 22 protruding in a convex shape toward the vehicle upper side along the shape of the rear end portion 52 </ b> A of the upper reinforcement 52. It has. FIG. 6 is a perspective view of the outer shape of the convex portion 22 of the floor panel 20 as viewed from the obliquely upward side of the vehicle. As shown in FIG. 6, the convex portion 22 is formed in a table shape that is one step higher on the vehicle upper side than the general surface of the floor panel 20. As shown in FIG. 3, the convex portion 22 of the floor panel 20 is provided with a mating portion 22 </ b> A superimposed on the vehicle lower side of the top wall portion 58 at the rear end portion 52 </ b> A of the upper reinforcement 52. In addition, the dashed-two dotted line 23 in a figure has shown the position of the contrast structure which does not protrude the floor panel 20 to a vehicle upper side (a floor surface is not raised) (FIG. 4 is also the same).

  As shown in FIG. 2, an end portion 64 </ b> A of a first floor cross member 64 (No. 1 cross) as a cross member is disposed in the vicinity of the coupling portion between the upper reinforcement 52 and the rocker 30. The first floor cross member 64 is formed in a substantially hat shape in which the vehicle lower side is opened. The first floor cross member 64 protrudes in a convex shape toward the vehicle upper side by a pair of left and right side wall portions 68A and 68B and a top wall portion 70, and The flange portions 66A and 66B are coupled to the upper surface 20B side of the floor panel 20 and arranged with the vehicle width direction as the longitudinal direction. Thereby, the floor panel 20 and the first floor cross member 64 form a closed cross-sectional structure including the closed cross-sectional portion 72.

  Further, the first floor cross member 64 has an end portion 64 </ b> A disposed on the rocker 30 side positioned on the vehicle upper side of the upper reinforcement 52 (in other words, the upper reinforcement 52 is connected to the first floor cross member 64. I'm passing under.) The left and right flange portions 66A and 66B in the end portion 64A are spot welded (indicated by “x” marks) in a state where three sheets are stacked together with the top wall portion 58 and the mating portion 22A of the floor panel 20 in the rear end portion 52A of the upper reinforcement 52. (The same applies to FIG. 5) and is coupled to the upper surface side of the top wall portion 58 of the upper reinforcement 52.

  In this way, spot welding can be performed in a three-ply state in that the floor panel 20 protrudes convexly toward the vehicle upper side along the shape of the rear end portion 52A of the upper reinforcement 52 and the rear end portion 52A of the upper reinforcement 52 It is because it is the structure provided with the matching part 22A superimposed on the vehicle lower side. That is, for example, in the contrast structure in which the floor panel 20 is formed flat like the two-dot chain line 23 in FIG. 3, spot welding is not possible in the three-layered state, but in this embodiment, after the upper reinforcement 52 Since the floor panel 20 is lifted to the vehicle upper side on the vehicle lower side of the end portion 52A (the structure in which the floor panel 20 is made to follow the top wall portion 58 of the upper reinforcement 52), Spot welding is possible.

  As shown in FIG. 2, the first floor cross member 64 has terminal flange portions 66C, 66D, 66E bent at the terminal on the rocker 30 side to the left and right and the upper side, and the rocker 30 (the inner wall portion of the rocker inner panel 34). 34B) by spot welding.

  As shown in FIG. 1, a second floor cross member 74 (No. 2 cross) is disposed on the vehicle rear side of the first floor cross member 64. The second floor cross member 74 is coupled to the upper surface 20 </ b> B side of the floor panel 20, arranged with the vehicle width direction as the longitudinal direction, and coupled to the rocker 30.

  As shown in FIG. 2, on the outer side in the vehicle width direction of the intersection of the upper reinforcement 52 and the first floor cross member 64, there is a bulk 80 (a reinforcing member) in the rocker 30 (in the closed cross section 30 </ b> A of the rocker 30). (Bulk head) is fixed. The bulk 80 includes an inner wall portion 82 disposed adjacent to the inner wall portion 34B of the rocker inner panel 34. Further, the bulk 80 includes a front side wall portion 84 as a first vertical wall portion bent substantially at a right angle from the front end side (front side in the vehicle front-rear direction) of the inner side wall portion 82 to the rocker outer panel 32 side. The rear side wall portion 86 is bent substantially at a right angle from the rear end side (rear side in the vehicle front-rear direction) 82 to the rocker outer panel 32 side and arranged in parallel to the front side wall portion 84.

  The front side wall portion 84 is arranged along a direction intersecting (orthogonal in the present embodiment) with respect to the longitudinal direction of the rocker 30 in a plan view of the vehicle, and in this embodiment, the general surface thereof extends in the vehicle vertical direction and the vehicle width direction. The surface to be included is the surface direction, and is in contact with the inner wall portion 34B of the rocker 30 on the inner side in the vehicle width direction. Upper flange portions 84A and 86A and lower flange portions 84B and 86B that are bent in the vehicle front-rear direction (a direction away from each other) are formed from the upper and lower ends of the front sidewall portion 84 and the rear sidewall portion 86, respectively. The upper flange portions 84A and 86A are coupled to the top wall portion 34A of the rocker inner panel 34 by welding or the like, and the lower flange portions 84B and 86B are coupled to the bottom wall portion 34C of the rocker inner panel 34 by welding or the like. .

  FIG. 5 shows a plan view of the rocker 30 in a state where the bulk 80 on the vehicle upper side is broken. As shown in FIG. 5, the front side wall portion 84 of the bulk 80 and the rear end vertical wall portion 156 of the upper reinforcement 52 are aligned (aligned) with the surface direction of the general surface and the vehicle front-rear direction position. They are arranged on extended positions in the vehicle width direction. In other words, the rear end vertical wall portion 156 in the rear end portion 52A of the upper reinforcement 52 is in series with the front wall portion 84 on the inner side in the vehicle width direction of the front wall portion 84 of the bulk 80 (so as to be aligned in a straight line). ) Is arranged.

(Operation and effect of the embodiment)
Next, the operation and effect of the above embodiment will be described.

  As shown in FIG. 1, the under-reinforce 48 is provided with a front end portion 48A side on the rear end portion 42A side of the front side member 42, and extends outward in the vehicle width direction toward the vehicle rear side. It is coupled to the lower surface 20A (see FIG. 2) side and the rear end 48B side is coupled to the rocker 30, and the load F from the vehicle front side inputted to the front side member 42 is supported by the under reinforcement 48. Then, it is transmitted to the joint between the under reinforcement 48 and the rocker 30.

  Here, the upper reinforcement 52 disposed opposite to the under reinforcement 48 with the floor panel 20 interposed therebetween extends along the extending direction of the under reinforcement 48 in a plan view of the vehicle and is coupled to the upper surface 20B side of the floor panel 20. At the same time, since the rear end portion 52 </ b> A side is coupled to the rocker 30, a part of the load F input to the front side member 42 is transmitted from the upper reinforcement 52 to the rocker 30. Accordingly, the rocker 30 supports the load in a range including not only the joint portion with the under reinforcement 48 but also the joint portion with the upper reinforcement 52.

  Supplementally, the joint between the under reinforcement 48 and the rocker 30 is a part that supports the load from the front side member 42 in the event of a frontal collision, and a relatively large load (load) is applied. If the joint portion buckles (collapses), the amount of deformation of the cabin 12 increases before the vehicle body front portion 40 exhibits collision performance (energy absorption performance). However, in the vehicle body skeleton structure according to the present embodiment, the load acting on the rocker 30 is also distributed to the joint portion between the upper reinforcement 52 and the rocker 30, so that local deformation occurs at the joint portion between the under reinforcement 48 and the rocker 30. This is prevented or suppressed.

  Compared to the contrast structure, for example, in a contrast structure in which the under reinforcement extends to the rocker and is coupled to the rocker, and the upper reinforcement extends to the cross member, the upper reinforcement and the rocker are coupled. Therefore, the structure has a lower yield strength, and the rear reinforcement is located on the vehicle rear side of the cross member so that there is no upper reinforcement on the upper side of the vehicle. End up. For this reason, the contrast structure has room for improvement as a structure for preventing or suppressing buckling (collapse) of the joint portion between the under reinforcement and the rocker at the time of a frontal collision. On the other hand, in the vehicle body skeleton structure according to the present embodiment, the upper reinforcement 52 is coupled to the rocker 30 through the vehicle lower side of the first floor cross member 64. Therefore, at the time of a frontal collision, the under reinforcement 48 and the rocker 30 can be prevented from buckling, or the amount of deformation at the joint can be suppressed as compared with the contrast structure.

  In addition, as shown in FIG. 2, the first floor cross member 64 is coupled to the upper surface 20 </ b> B side of the floor panel 20 and arranged with the vehicle width direction as the longitudinal direction, and on the rocker 30 side of the first floor cross member 64. Since the end 64A to be arranged is located on the vehicle upper side of the upper reinforcement 52 and is coupled to the upper surface side of the top wall portion 58 of the upper reinforcement 52 and the rocker 30, the periphery of the coupling portion between the upper reinforcement 52 and the rocker 30 is Tightly coupled.

  Furthermore, the floor panel 20 protrudes toward the vehicle upper side along the shape of the rear end portion 52A of the upper reinforcement 52, and the mating portion 22A is overlapped on the vehicle lower side of the rear end portion 52A of the upper reinforcement 52, Since the mating portion 22A of the floor panel 20, the top wall portion 58 at the rear end portion 52A of the upper reinforcement 52, and the left and right flange portions 66A and 66B of the first floor cross member 64 are coupled in a three-layered state, The three parts of the panel 20, the upper reinforcement 52, and the first floor cross member 64 are firmly coupled (realization of a strong coupling structure). For this reason, when a load is transmitted from the upper reinforcement 52 to the rocker 30 at the time of a frontal collision, deformation around the joint between the upper reinforcement 52 and the rocker 30 is more effectively prevented or suppressed, and the load is further stable. Supported by

  Further, as shown in FIG. 5, the bulk 80 is fixed in the rocker 30, and the front side wall portion 84 of the bulk 80 is disposed along the direction orthogonal to the longitudinal direction of the rocker 30 in a plan view of the vehicle. The inner wall portion 34B is in contact with the inner wall portion 34B on the inner side in the vehicle width direction, and the rear end portion 52A of the upper reinforcement 52 is located on the inner wall portion 34B side and the front wall portion 84 on the inner side in the vehicle width direction of the front wall portion 84 of the bulk 80. The rear end vertical wall portion 156 arranged in series with respect to the front wall of the bulk 80 is provided from the rear end vertical wall portion 156 of the upper reinforcement 52 through the inner wall portion 34B of the rocker 30 at the time of a frontal collision. A part of the load is also transmitted to the portion 84, and the load is further dispersed. At this time, the position where the load is applied from the rear end vertical wall portion 156 of the upper reinforcement 52 to the inner wall portion 34B of the rocker 30 and the position where the load by the front wall portion 84 of the bulk 80 is supported are opposed to each other. Even if a load acts on the inner wall portion 34B of the rocker 30 from the rear end vertical wall portion 156, local deformation of the inner wall portion 34B of the rocker 30 is effectively prevented or suppressed. Incidentally, at the time of a side collision, an input load to the rocker 30 is transmitted to the upper reinforcement 52 by the front side wall portion 84 of the bulk 80 and the rear end vertical wall portion 156 of the upper reinforcement 52, so that the first floor cross member 64 and The load burden on the second floor cross member 74 can be reduced.

  As described above, according to the vehicle body skeleton structure according to the present embodiment, it is possible to prevent or suppress the deformation of the joint portion between the under reinforcement 48 (see FIG. 2 and the like) and the rocker 30 at the time of a frontal collision.

(Supplementary explanation of the embodiment)
In the above-described embodiment, the floor panel 20 shown in FIG. 2 is provided with the convex portion 22 that protrudes upward in the vehicle along the shape of the rear end portion 52A of the upper reinforcement 52. 22A, the top wall portion 58 at the rear end portion 52A of the upper reinforcement 52, and the left and right flange portions 66A, 66B of the first floor cross member 64 are coupled in a three-ply state, and such a configuration is preferable. For example, the floor panel may not be formed with a portion projecting upward of the vehicle along the shape of the rear end portion of the upper reinforcement, and the rear end portion of the upper reinforcement and the cross member may be coupled in a stacked state. Good.

  Further, in the above embodiment, the rear end portion 52 </ b> A of the upper reinforcement 52 is arranged in series with the front wall portion 84 on the inner wall portion 34 </ b> B side and inside the front wall portion 84 of the bulk 80 in the vehicle width direction. A rear end vertical wall portion 156 is provided, and such a configuration is preferable. For example, the rear end portion of the upper reinforcement has an inner side in the vehicle width direction of the first vertical wall portion at a position located on the inner wall side. It is good also as a structure by which the 2nd vertical wall part arrange | positioned in series with respect to the 1st vertical wall part is not provided.

  Further, in the above embodiment, the front side wall portion 84 of the bulk 80 and the rear end vertical wall portion 156 of the upper reinforcement 52 both have plane surfaces that are planes including the vehicle vertical direction and the vehicle width direction. The first vertical wall portion of the member and the second vertical wall portion of the upper reinforcement both include, for example, general directions of the vehicle vertical direction and a direction slightly inclined toward the vehicle rear side toward the vehicle width direction outer side. The surface may be a surface direction.

  In the above embodiment, in FIG. 1, the first floor cross member 64 is illustrated as an example in which a pair of left and right are provided by connecting the tunnel portion 24 and the rocker 30, but the cross member is, for example, Further, it may be a cross member arranged with the vehicle width direction as the longitudinal direction and connecting a pair of left and right rockers. The same applies to the second floor cross member 74.

It is a top view which shows typically the whole structure of the vehicle body frame structure concerning one embodiment of the present invention. It is a perspective view showing the important section composition of the body frame structure concerning one embodiment of the present invention in the state seen from the cabin side. FIG. 3 is an enlarged cross-sectional view taken along line 3-3 in FIG. 2. FIG. 4 is an enlarged cross-sectional view taken along line 4-4 of FIG. It is a top view showing the important section composition of the body skeletal structure concerning one embodiment of the present invention in the state seen from the vehicles upper part side (showing in the state where the bulk vehicle upper part part in a rocker was fractured). It is a perspective view showing the shape of the floor panel of the body frame structure according to one embodiment of the present invention as seen from the cabin side.

Explanation of symbols

20 Floor panel (body floor)
20A Underside of floor panel (underside of car floor)
20B Upper surface of the floor panel (upper surface of the vehicle body floor)
22A Alignment section 30 Rocker 34B Inner wall section 40 Vehicle body front section 42 Front side member 48 Under reinforce 52 Upper reinforce 52A Rear end of upper reinforce 64 First floor cross member (cross member)
80 Bulk (Reinforcing member)
84 Front side wall (first vertical wall)
156 Rear end vertical wall (second vertical wall)

Claims (3)

A rocker arranged with the longitudinal direction of the vehicle in the longitudinal direction on both sides of the vehicle floor in the vehicle width direction;
A front end side is provided on the rear end side of the front side member arranged on both sides of the front part of the vehicle body, and extends outward in the vehicle width direction toward the vehicle rear side and is coupled to the lower surface side of the vehicle body floor. And the rear end side is coupled to the rocker, underreinforce that can support the load from the front side of the vehicle input to the front side member,
The underreinforce is disposed opposite to the vehicle floor with the vehicle body floor interposed therebetween, and extends along the extending direction of the underreinforce in a plan view of the vehicle and is coupled to the upper surface side of the vehicle body floor, and the rear end side is the rocker Upper reinforcement combined with
It is connected to the upper surface side of the vehicle body floor and is arranged with the vehicle width direction as the longitudinal direction, and the end portion arranged on the rocker side is located on the vehicle upper side of the upper reinforcement and the upper surface side of the upper reinforcement and the rocker A cross member joined to
A vehicle body skeleton structure. A reinforcing member fixed in the rocker, the reinforcing member being arranged along a direction intersecting with the longitudinal direction of the rocker in plan view of the vehicle, and on an inner wall portion of the rocker on the inner side in the vehicle width direction A first vertical wall portion in contact therewith,
A rear end portion of the upper reinforcement has a second vertical wall portion that is located on the inner wall portion side and is arranged in series with the first vertical wall portion on the inner side in the vehicle width direction of the first vertical wall portion. The vehicle body skeleton structure according to claim 1, which is provided. The vehicle body floor is provided with a mating portion that protrudes toward the vehicle upper side along the shape of the rear end portion of the upper reinforcement and is superimposed on the vehicle lower side of the rear end portion of the upper reinforcement.
The vehicle body skeleton structure according to claim 1 or 2, wherein the mating portion of the vehicle body floor, the rear end portion of the upper reinforcement, and the cross member are coupled in a three-layered state.

Images