JP6052231B2 - Vehicle body structure - Google Patents

Description

  The present invention relates to a vehicle body structure including a load transmission member that protrudes outward in the vehicle width direction from an outer portion in the vehicle width direction of a front end side portion of a side frame.

Conventionally, a deformation mode control that absorbs impact energy by deforming the front side frame in a predetermined deformation mode by the impact load input to the front side frame in order to reduce the impact load on the passenger at the time of frontal collision of the vehicle It has been known.
In this deformation mode control, the crash can provided at the front end of the front side frame is crushed and deformed in the early stage of the collision, and in the middle and subsequent stages of the collision, the front side frame is positioned outside the vehicle width direction from the joint with the dash panel. The vehicle body deceleration is increased at the initial stage of the collision by maintaining the large vehicle body deceleration.

  In a frontal collision of a vehicle, an impact load may act on a vehicle body portion on the outer side in the vehicle width direction than the front side frame. In this small overlap collision (hereinafter abbreviated as SOL collision), there is a risk that the collision object may enter between the front side frame and the front wheel, and the collision object and the front side frame overlap with each other. The load transmission efficiency to the side frame is reduced, the amount of impact energy absorbed by the deformation of the front side frame is reduced, and the impact load is easily transmitted to the passenger compartment side.

  The vehicle body structure of the vehicle of Patent Document 1 is provided with a projecting portion (load transmission member) having a closed cross section that projects outward from the front side frame in the vehicle width direction, and the front end of the projecting portion is connected to the crash can and the front side in the longitudinal direction of the vehicle body. The connecting portion with the frame is connected via a set plate, and the side surface on the outer side in the vehicle width direction of the protruding portion is formed so as to incline in the vehicle width direction toward the rear of the vehicle body in plan view, and the protruding portion and the power unit are The vehicle is overlapped in the longitudinal direction.

In addition, a technique for forming a load transmission member using an apron reinforcement (hereinafter, abbreviated as rain) that is a vehicle body constituting member has been proposed.
The vehicle body structure of the vehicle of Patent Document 2 includes a front side frame, an apron rain, and a crash can attached to the front end of the front side frame via a set plate, and has an apron outside the front side frame in the vehicle width direction. A connecting member (load transmission member) having a closed cross section for connecting the tip of the rain and the set plate is provided.

JP 2013-212757 A JP 2005-231435 A

Generally, a crash can with a bumper rain attached to the tip is fastened and fixed to a set plate provided at the tip of the front side frame by a fastening member (for example, a bolt) whose rear end can be screwed. In the event of a light vehicle collision, the repairing property is ensured by replacing only the broken crash can with a new crash can by removing the fastening member.
In such a structure, the crash can is fastened and fixed to the set plate in the front-rear direction from the front to the rear of the vehicle body, so that the bumper rain is caused by the running vibration of the vehicle. Since it is easy to swing in the vertical direction, there has been a problem that the NVH (Noise Vibration Harshness) performance is lowered and the comfortability of the passenger in the room is deteriorated.

For the vertical vibration of the crash can, the set plate is abolished, the base end portion of the crash can is inserted into the front end of the front side frame, and the fastening area is fastened and fixed from the vehicle width direction. It can be increased and the support rigidity of the crash can can be improved, and vertical vibration can be suppressed.
However, if the set plate is abolished and the crash can is fastened and fixed in the vehicle width direction while taking measures against SOL collision, the following new problem may occur.

  That is, in the vehicle body structure of the above-mentioned patent document, when the set plate is abolished and the crash can is fastened and fixed from one end in the vehicle width direction, the crash can is placed on the side wall portion on the outer side in the vehicle width direction of the load transmission member having a closed cross section. It is necessary to form an access hole for a fastening tool for fastening and fixing, and accordingly, the rigidity of the load transmission member is reduced, and as a result, the load transmission efficiency to the front side frame by the load transmission member may be reduced. Therefore, it is necessary to take measures to increase the weight of the vehicle body, such as increasing the thickness of the load transmitting member, which is disadvantageous from the viewpoint of weight reduction.

  The objective of this invention is providing the vehicle body structure etc. of the vehicle which can make NVH performance and load transmission performance compatible, ensuring the repair property of a crash can.

  The vehicle body structure according to claim 1 includes a bumper reinforcement that extends in the vehicle width direction, a pair of left and right side frames that support the bumper reinforcement via a pair of left and right crash cans, and a pair of left and right sides of the vehicle. A vehicle body structure including a pair of left and right load transmitting members projecting outward in the vehicle width direction from the vehicle width direction outer side portion of the front end side portion of the side frame, wherein the base end portion of the crush can is the side The load transmission member is inserted into and fixed to the front end of the frame, and the front end of the load transmitting member is separated in a vertical section along the vehicle width direction. A connecting plate portion that connects a plurality of U-shaped cross-section portions each having a vertical plate portion that connects the inner end portions in the width direction, and an outer end portion in the vehicle width direction of the adjacent horizontal plate portions of the adjacent U-shaped cross-section portions. And comprising Plate portion is characterized in that it is fastened to the side frame by the fastening member.

  In this vehicle body structure, since the base end portion of the crash can is inserted and fixed at the front end portion of the side frame, it can be fastened and fixed from the vehicle width direction by the fastening member while suppressing the vertical vibration of the load transmitting member. it can. In addition, the front end portion of the load transmitting member includes a plurality of cogs provided with a pair of separated horizontal plate portions and vertical plate portions connecting the inner end portions in the vehicle width direction of the pair of horizontal plate portions in the vertical cross section. A cross-sectional portion and a connecting plate portion that connects the lateral end portions of the adjacent lateral plate portions of the adjacent U-shaped cross-sectional portions, and the vertical plate portion is fastened to the side frame by a fastening member. Therefore, the rigidity of the load transmission member is ensured by setting the horizontal plate part of the U-shaped cross section and the need for forming the access hole for the fastening tool in each plate part by the open shape of the U-shaped cross section. However, the connecting portion of the load transmitting member can be formed by the vertical plate portion of the U-shaped cross-sectional portion to ensure the crush can repairability.

The invention of claim 2 is characterized in that, in the invention of claim 1, an outer plate portion is provided which forms a closed cross section extending in the vehicle longitudinal direction by closing the outer side in the vehicle width direction of the U-shaped cross section. .
Thereby, in order to ensure the accessibility of a fastening tool, the front part of a U-shaped cross-sectional part is made into an open shape, and the rigidity of a load transmission member can be further improved by making a rear part into a closed cross-sectional shape.

According to a third aspect of the present invention, in the first or second aspect of the invention, the side frame is a front side frame, and a lowermost U-shaped cross-sectional portion of the plurality of U-shaped cross-sectional portions is the front side frame. It has the extension part connected with the mount member formed in the lower end part of this.
According to this, since the closed cross section can be formed also by the U-shaped cross section and the mount member, the rigidity of the load transmitting member can be further improved.

According to a fourth aspect of the present invention, in the third aspect of the present invention, the load transmitting member is a projecting member attached to an outer portion in the vehicle width direction of the front side frame, and an extension extending forward from a front end portion of the apron reinforcement. It is characterized in that it is constituted by any one of a superposing member obtained by superimposing the extending member on the projecting member and the protruding member.
According to this, it is possible to achieve both NVH performance and load transmission performance at the time of SOL collision while ensuring the repairability of the crash can.

1 is a perspective view of a front part of a vehicle body related to Example 1. FIG. It is a left side view of a vehicle body front part. It is the III-III sectional view taken on the line of FIG. It is the IV-IV sectional view taken on the line of FIG. It is a disassembled perspective view of a protrusion member. FIG. 3 is a diagram corresponding to FIG. 1 according to a second embodiment. It is a principal part enlarged view of FIG. FIG. 5 is a diagram corresponding to FIG. 4. FIG. 6 is a view corresponding to FIG. 3 according to a third embodiment. FIG. 6 is a diagram corresponding to FIG. 5.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The following description exemplifies a case where the present invention is applied to a vehicle, and does not limit the present invention, its application, or its use.

Embodiment 1 of the present invention will be described below with reference to FIGS.
As shown in FIGS. 1 and 2, a vehicle V includes a dash panel 1 that partitions a vehicle compartment S and an engine room E forward and backward, and a pair of left and right front side frames disposed on the front side of the dash panel 1. 2, a bumper reinforcement (hereinafter abbreviated as “bumper rain”) 4 supported by a pair of left and right cylindrical crush cans 3 on the front ends of the pair of front side frames 2, and a pair of front sides A pair of apron reinforcements (hereinafter abbreviated as apron rain) 5 disposed on the outer side in the vehicle width direction of the frame 2 and the dash panel 1 are disposed between the front side frame 2 and the apron rain 5. A pair of cylindrical suspension towers 6 and the like are provided.

  The vehicle V includes a suspension cross member 7 disposed below the engine room E, a pair of suspension arms 8 disposed on both left and right sides of the suspension cross member 7, and left and right disposed in the front-rear direction. A pair of extension members 9, a front cross member 10 attached to the front ends of the pair of extension members 9, and an outer side in the vehicle width direction from the outer side in the vehicle width direction at the front end side portion of the pair of front side frames 2. A pair of left and right projecting members 20 (load transmission members) and the like are provided. In the following description, the front-rear direction of the vehicle V is referred to as the front-rear direction, and the left-right direction is referred to as the left-right direction.

  The dash panel 1 is made of a steel plate that is thinner and relatively less rigid than the front side frame 2 or the like. The dash panel 1 includes a vertical wall portion 1a that extends in the vertical direction at the front end portion of the passenger compartment S, and an inclined portion 1b that extends in a downwardly downwardly inclined manner from the lower end edge of the vertical wall portion 1a. The lower end portion of the vertical wall portion 1a and the upper end portion of the inclined portion 1b are joined by spot welding. The rear end portion of the inclined portion 1b is joined to the front end portion of the floor panel (not shown). An upper end portion of the vertical wall portion 1a is joined to a cowl portion (not shown) extending in the vehicle width direction, and both end portions in the vehicle width direction of the dash panel 1 are joined to a front hinge pillar (not shown).

  As shown in FIGS. 1 and 2, a dash cross member 11 having a hat-shaped cross section extending in the vehicle width direction is formed on the front surface on the engine room E side at the joint portion between the vertical wall portion 1 a and the inclined portion 1 b of the dash panel 1. Is provided. The dash cross member 11 forms a closed cross section with the dash panel 1 and increases the rigidity of the dash panel 1. The left and right end portions of the dash cross member 11 are joined to a connecting portion L between a front side frame 2 and a dash panel 1 which will be described later, thereby enhancing the support rigidity of the front side frame 2.

Next, the pair of left and right front side frames 2 will be described.
The pair of left and right front side frames 2 are disposed on the front side of the dash panel 1 that partitions the front end of the passenger compartment S so as to extend in the front-rear direction to the left and right portions of the engine room E. That is, the pair of left and right front side frames 2 extend substantially horizontally rearward from the front end side position of the vehicle V, and the middle part of the rear end side is joined to the vertical wall portion 1a of the dash panel 1 so that the rear end side The portion is joined to the inclined portion 1b so as to extend rearward and downward along the lower surface of the floor panel. The rear end side portion of the front side frame 2 is joined to the dash panel 1 by the coupling portion L.

The front side frame 2 is composed of a front frame that forms a closed cross section having a substantially rectangular cross section by the frame itself, and a rear frame that forms a closed cross section in cooperation with the inclined portion 1b and the floor panel. Yes. The rear end of the front frame and the vertical wall portion 1a and the inclined portion 1b of the dash panel 1 are joined by spot welding, the rear frame is joined to the inclined portion 1b and the floor panel, the rear end portion of the front frame and the rear frame The front end is joined.
In the following description, the horizontal front frame is described as the front side frame 2 unless otherwise specified.

  As shown in FIGS. 1-5, the front side frame 2 is comprised from the outer panel 2a of the vehicle width direction outer side, and the inner panel 2b of the vehicle width direction inner side. The outer panel 2a is a member formed by press-molding a flat high-tensile steel plate, and the outer panel 2a includes an outer upper flange portion positioned on the upper side, an outer lower flange portion positioned on the lower side, and a vertical position positioned between the two. And an outer panel main body having a substantially U-shaped cross section. Similarly, the inner panel 2b made of high-tensile steel plate includes an inner upper flange portion located on the upper side, an inner lower flange portion located on the lower side, and an inner panel main body portion having a substantially U-shaped vertical section located between the two. Yes.

  The outer upper flange portion and the inner upper flange portion are spot welded, and the outer lower flange portion and the inner lower flange portion are spot welded, whereby the upper coupling flange and the lower coupling flange of the front side frame 2 are respectively configured. Yes. The lower coupling flange is formed from the front end of the front side frame 2 to a position near the front of the coupling portion L, and the outer panel main body portion and the inner panel main body portion are arranged from the rear end portion of the lower coupling flange to the middle stage of the inclined portion 1b. It extends further to the back over the part.

A bumper rain 4 is supported on the front end portion of the front side frame 2 via a crash can 3. The crash can 3 is formed of a metal cylindrical body of the same type as the front side frame 2. A nut plate 12 having a substantially U-shaped horizontal cross section is disposed at the rear end of the crash can 3. The nut plate 12 is provided with a pair of upper and lower nuts 13 on a pair of left and right inner portions thereof so as to correspond to a pair of upper and lower bolt holes 3a (see FIG. 5) formed on both left and right portions of the crash can 3. Each is welded.
When the impact load is relatively small, such as a light collision, the front side frame 2 is not damaged and only the crash can 3 is crushed to absorb the impact, and only the deformation of the crash can 3 cannot absorb the impact. The front side frame 2 is bent and deformed to absorb the impact and reduce the impact load transmitted to the passenger compartment S.

A pair of left and right apron rain 5 extends forward from the base portion of the pair of front hinge pillars, and supports a pair of suspension towers 6 respectively. Fender panels are respectively attached to the outer portions of the apron rain 5 in the vehicle width direction.
The pair of left and right extension members 9 extend in the front-rear direction at the side of the engine room E in order to support the engine (not shown), and their rear ends are connected to the front end of the suspension cross member 7. Yes. A front end portion of the extension member 9 is coupled to a front end lower end portion of the front side frame 2 via a rectangular parallelepiped mount member 14.
The left and right ends of the front cross member 10 are fixed to the mount member 14 with the extension member 9 interposed therebetween.

Next, the pair of left and right protruding members 20 will be described.
As shown in FIGS. 1 to 5, the left projecting member 20 is symmetrical with the right projecting member 20, and therefore, the left projecting member 20 will be mainly described below.
As shown in FIGS. 3 to 5, the projecting member 20 includes a pair of spaced apart horizontal plate portions 21 a and a vertical plate portion 21 b that connects right end portions of the pair of horizontal plate portions 21 a in the vertical cross section. A pair of upper and lower U-shaped cross-sectional portions 21 that extend in the front-rear direction, a connecting plate portion 22 that connects the left end portions of adjacent horizontal plate portions 21a of adjacent U-shaped cross-sectional portions 21, and a pair of upper and lower sides And an outer plate portion 23 that closes the left side of the U-shaped cross-section portion 21 and forms a closed cross-section portion that extends in the longitudinal direction of the vehicle body.

The front end of the protruding member 20 is disposed at the same front-rear direction position as the front end portion of the front side frame 2 in plan view. The horizontal plate portion 21a is configured to extend from the outer panel 2a to the left side in a substantially horizontal shape, and is formed in a substantially triangular shape in plan view.
The uppermost U-shaped cross-sectional portion 21 has a flange portion that protrudes substantially vertically upward from the left end portion of the upper lateral plate portion 21a.
One bolt hole 21f is formed in each front end portion of the pair of upper and lower vertical plate portions 21b.

The lowermost U-shaped cross-section 21 has an extension 24 for joining to the left wall of the mount member 14 formed at the lower end of the front side frame 2.
The extension portion 24 extends substantially vertically downward from the left end portion of the lower lateral plate portion 21 a, then extends obliquely downward to the right until it contacts the mount member 14, and again extends substantially vertically along the left wall portion of the mount member 14. The extension portion 24 and the left side wall portion of the mount member 14 cooperate to form a closed cross-section portion extending in the front-rear direction.
The outer side plate portion 23 opens the left side of the pair of upper and lower bolt holes 21f so that the fastening tool can access, and also has a pair of upper and lower U-shaped cross sections from the position near the rear end to the position near the front end. It is formed so as to block the left side of the portion 21.
The outer side plate portion 23 is joined to the flange portion of the upper horizontal plate portion 21 a of the uppermost U-shaped cross-sectional portion 21, the connecting plate portion 22, and the left end portion of the extension portion 24. The U-shaped cross-section 21 and the outer plate 23 form a closed cross-section that extends in the front-rear direction in cooperation.

Next, a procedure for assembling the crash can 3 and the protruding member 20 will be described.
First, as shown in FIG. 5, a pair of upper and lower U-shaped cross-sectional portions 21 in a state where a pair of upper and lower bolt holes 2f provided in the outer panel 2a and a bolt hole 21f of upper and lower vertical plate portions 21b are positioned. Is joined to the front end portion of the outer panel 2a. Here, the extension portion 24 is welded to the left side wall portion of the mount member 14.

  Then, the crush can 3 provided with the nut plate 12 is inserted into the front end portion of the front side frame 2. At this time, on the outer side in the vehicle width direction, positioning is performed with a pair of upper and lower nuts 13, a pair of upper and lower bolt holes 3 a of the crash can 3, a bolt hole 2 f of the outer panel 2 a, and a pair of upper and lower bolt holes 21 f. On the inner side in the direction, the upper and lower pair of nuts 13, the upper and lower pair of bolt holes 3 a of the crush can 3 and the upper and lower pair of bolt holes 2 g of the inner panel 2 b are positioned.

Next, on the outer side in the vehicle width direction, the vertical plate portion 21b, the outer panel 2a, the crash can 3 and the nut plate 12 of the pair of upper and lower U-shaped cross-sectional portions 21 are fastened together by a pair of bolts 26, and the vehicle width direction Inside, the inner panel 2b, the crash can 3 and the nut plate 12 are fastened together by a pair of bolts 26. Finally, the outer side plate portion 23 is connected to the flange portion of the upper horizontal plate portion 21a of the uppermost U-shaped cross-section portion 21 and the connecting plate portion 22 and the lower horizontal plate portion 21a of the lowermost U-shaped cross-sectional portion 21. Join to the widthwise outer edge.
As a result, when only the crash can 3 is crushed, the fastening tool is inserted from the left side of the U-shaped cross-section 21 to remove the bolt 26 and replace it with a new crash can 3.

Next, operations and effects of the vehicle body structure of the vehicle V will be described.
In the vehicle body structure of the vehicle V, since the rear end portion of the crash can 3 is inserted and fixed to the front end portion of the side frame 2, it is fastened and fixed from the vehicle width direction by the bolt 26 while suppressing vertical vibration of the protruding member 20. can do. Further, the front end portion of the projecting member 20 is connected to a pair of spaced apart horizontal plate portions 21a and inner ends in the vehicle width direction of the pair of horizontal plate portions 21a in a vertical cross section along the vehicle width direction. A pair of upper and lower U-shaped cross-sectional portions 21 each provided with a portion 21b, and a connecting plate portion 22 that connects the lateral end portions of the adjacent lateral plate portions 21a of the adjacent U-shaped cross-sectional portions 21 to each other in the vehicle width direction. Since the vertical plate portion 21 b is fastened to the outer panel 2 a by the bolt 26, a fastening tool access hole is set by setting the horizontal plate portion 21 a of the U-shaped cross-section portion 21 and the open shape of the U-shaped cross-section portion 21. The connecting portion of the protruding member 20 is formed by the vertical plate portion 21a of the U-shaped cross-section portion 21 while the rigidity of the protruding member 20 is secured by not having to form the plate on each plate portion. Can be secured.

Since the outer plate portion 23 that forms the closed cross section extending in the vehicle longitudinal direction by closing the outer side in the vehicle width direction of the U-shaped cross section 21 is provided, the U-shaped cross section 21 of the U-shaped cross section 21 is secured in order to ensure the accessibility of the fastening tool. By making the front part an open shape and the rear part a closed cross-sectional shape, the rigidity of the protruding member 20 can be further improved.
The side frame is the front side frame 2, and the lowermost U-shaped cross-section 21 of the pair of upper and lower U-shaped cross-sections 21 is formed on the mount member 14 formed at the lower end of the front side frame 2. Since it has the extended part 24 connected, since the closed cross section can be formed also by the U-shaped cross section 21 and the mount member 14, the rigidity of the protruding member 20 can be further improved.

Next, the vehicle body structure of the vehicle according to the second embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the member similar to Example 1. FIG.
The load transmission member of the first embodiment is configured by the protruding member 20 attached to the outer side portion of the front side frame 2 in the vehicle width direction, whereas the load transmission member of the second embodiment has a front side from the front end portion of the apron rain 5A. It is comprised by the extending member 30 extended in this.

  As shown in FIGS. 6 to 8, the vehicle VA is provided with a pair of left and right apron rain 5 </ b> A disposed on the outer side in the vehicle width direction of the pair of front side frames 2. Extending members 30 constituting a closed cross-sectional portion having a substantially rectangular vertical cross section are detachably attached to the front end portions of the apron rain 5A. Since the left extending member 30 is symmetrical with the right extending member 30, the left extending member 30 will be mainly described below.

  The extending member 30 is formed in a forward and downward inclined shape on the outer side in the vehicle width direction of the front side frame 2, and is provided so that the front end portion thereof is adjacent to the left side position of the front end portion of the front side frame 2. The extending member 30 has a vertical cross section 1 having a pair of separated horizontal plate portions 31a and a vertical plate portion 31b connecting the right end portions of the pair of horizontal plate portions 31a in the vertical cross section. A pair of U-shaped cross-sectional portions 31, a connecting plate portion 32 that connects the left end portions of adjacent horizontal plate portions 31 a of adjacent U-shaped cross-sectional portions 31, and the left side of a pair of upper and lower U-shaped cross-sectional portions 31 And an outer plate portion 33 having a substantially cross-sectional hat shape that forms a closed cross-sectional portion extending in the longitudinal direction of the vehicle body.

As shown in FIGS. 7 and 8, the front end of the extending member 30 is disposed at the same front-rear direction position as the front end portion of the front side frame 2 in plan view. Each horizontal plate portion 31a is configured to extend from the outer panel 2a to the left side in a substantially horizontal shape.
The uppermost U-shaped cross-sectional portion 31 has a flange portion that protrudes substantially vertically upward from the left end portion of the upper lateral plate portion 31a. One bolt hole 31f is formed in each front end portion of the pair of upper and lower vertical plate portions 31b.

The U-shaped cross-sectional portion 31 at the lowermost end has a flange portion projecting substantially vertically downward from the left end portion of the lower lateral plate portion 31a.
The outer side plate portion 33 opens the left side of the pair of upper and lower bolt holes 31f so that the fastening tool can be accessed, and also has a pair of upper and lower U-shaped cross sections extending from the rear end position of the extending member 30 to the position near the front end. It is formed so as to block the left side of the portion 31. The outer side plate portion 33 is connected to the flange portion of the upper horizontal plate portion 31 a of the uppermost U-shaped cross-section portion 31, the flange portion of the lower horizontal plate portion 31 a of the lowermost U-shaped cross-section portion 31, and the connecting plate portion 32. It is joined.

As shown in FIG. 8, on the outer side in the vehicle width direction, a pair of upper and lower nuts 13, a pair of upper and lower bolt holes 3a of the crash can 3, a pair of upper and lower bolt holes 2f of the outer panel 2a, and a pair of upper and lower bolt holes 31f. The nut plate 12, the crash can 3, the outer panel 2a, and a pair of upper and lower vertical plate portions 31b (a U-shaped cross-sectional portion 31) are fastened together by a pair of bolts 26. Further, on the inner side in the vehicle width direction, a pair of upper and lower nuts 13, a pair of upper and lower bolt holes 3 a of the crash can 3, and a pair of upper and lower bolt holes 2 g of the inner panel 2 b are positioned. The plate 12, the crash can 3 and the inner panel 2b are fastened together.
Thereby, NVH performance and shock absorption performance can be increased while ensuring the repairability of the crash can 3.

Next, the vehicle body structure of the vehicle according to the third embodiment will be described with reference to FIGS.
In addition, the same code | symbol is attached | subjected to the member similar to Example 1. FIG.
The load transmission member of the first embodiment is configured by a protruding member having a plurality of U-shaped cross-sections in a vertical section, whereas the load transmitting member of the third embodiment superimposes an extending member on the protruding member. The superposed member 40 is used.

  As shown in FIGS. 9 and 10, this vehicle VB has a pair of left and right overlapping members 40 projecting outward in the vehicle width direction from the vehicle width direction outer portion of the front end side portion of the pair of front side frames 2. Is provided. Since the left overlapping member 40 has a symmetrical configuration with the right overlapping member 40, the left overlapping member 40 will be mainly described below.

The overlapping member 40 includes a protruding member 20A, an extending member 30A, and an outer plate portion 43.
The protruding member 20 </ b> A has basically the same configuration as the protruding member 20 except for the outer plate portion 23, and the extending member 30 </ b> A has basically the same configuration as the extending member 30 except for the outer plate portion 33.
The protruding member 20A has a pair of upper and lower portions extending in the front-rear direction, each having a pair of spaced apart horizontal plate portions 21a and a vertical plate portion 21b connecting the right end portions of the pair of horizontal plate portions 21a in the vertical cross section. The U-shaped cross-sectional portion 21 and a connecting plate portion 22 that connects the left end portions of the adjacent horizontal plate portions 21a of the adjacent U-shaped cross-sectional portions 21 are provided.
One bolt hole 21f is formed in each front end portion of the pair of upper and lower vertical plate portions 21b.

The extending member 30A is configured to be superposed on the protruding member 20A, and in the vertical cross section, a pair of separated horizontal plate portions 31a and a vertical plate portion 31b that connects the right end portions of the pair of horizontal plate portions 31a. And a pair of upper and lower U-shaped cross-sectional portions 31 extending in the front-rear direction, and a connecting plate portion 32 for connecting the left end portions of the adjacent horizontal plate portions 31a of the adjacent U-shaped cross-sectional portions 31. Yes.
The pair of upper and lower U-shaped cross-sections 31 is configured to be fitted to the pair of upper and lower U-shaped cross-sections 21 from the left side. One bolt hole 31f is formed in the front end portion of the pair of upper and lower vertical plate portions 31b corresponding to the bolt holes 21f.
The outer plate portion 43 opens the left side of the pair of upper and lower bolt holes 31f (21f) so that the fastening tool can access it, and extends from the rear end position of the extending member 30A to the position near the front end. It is formed so as to block the left side of the letter-shaped cross-section 31.

  As shown in FIGS. 9 and 10, on the outer side in the vehicle width direction, a pair of upper and lower nuts 13 and a pair of upper and lower bolt holes 3a of the crash can 3 and a pair of upper and lower bolt holes 2f of the outer panel 2a and a pair of upper and lower sides. The bolt holes 21f and the upper and lower pairs of bolt holes 31f are positioned, and the nut plate 12, the crash can 3, the outer panel 2a, the upper and lower pair of vertical plate portions 21b, and the upper and lower pair of vertical plate portions 31b are positioned by the pair of bolts 26. And are tightened together. Further, on the inner side in the vehicle width direction, a pair of upper and lower nuts 13, a pair of upper and lower bolt holes 3 a of the crash can 3, and a pair of upper and lower bolt holes of the inner panel 2 b are positioned. 12, the crash can 3 and the inner panel 2b are fastened together. Thereby, NVH performance and load transmission performance at the time of SOL collision can be made compatible, ensuring the repair property of a crash can.

Next, a modified example in which the embodiment is partially changed will be described.
1] In the above embodiment, an example of a front side frame has been described, but the present invention may be applied to a rear side frame.

2] In the above embodiment, the example in which the U-shaped cross-section is formed in a long shape from the front end to the rear end of the load transmitting member has been described. However, at least the vertical plate portion in which the bolt hole is formed is It suffices if it can be formed, and it may be formed only on the front half of the load transmitting member. Further, it is possible to form only in the front half of the load transmitting member and reduce the depth toward the rear side.

3] In the above embodiment, an example of a load transmission member having a pair of upper and lower U-shaped cross-sections has been described, but three or more U-shaped cross-sections may be provided, and according to load transmission requirements Any number can be set. Moreover, although the example which comprised the front of the load transmission member in the open shape was demonstrated, you may provide the front board part which block | closes the front of a load transmission member.

4) In the above-described embodiment, the example in which the outer plate portion that covers the outside of the U-shaped cross section excluding the front end portion of the load transmitting member is provided has been described. However, the outer plate portion can be omitted depending on the design conditions. .
Further, since the load transmission performance is ensured by the horizontal plate portion, the assist hole may be formed in the outer plate portion by closing all the outer sides of the U-shaped cross-section portion of the load transmission member.

5] In addition, those skilled in the art can implement the present invention with various modifications added without departing from the spirit of the present invention, and the present invention includes such modifications. is there.

V, VA, VB Vehicle 2 Front side frame 3 Crash can 4 Bumper rain 5 and 5A Apron rain 14 Mount member 20 and 20A Protruding member 21 U-shaped cross section 21a Horizontal plate portion 21b Vertical plate portion 22 Connecting plate portion 23 Outer plate portion 24 Extension part 26 Bolt 30, 30A Extension member 31 U-shaped cross-section part 31a Horizontal plate part 31b Vertical plate part 32 Connection plate part 33 Outer plate part 40 Superposition member 43 Outer plate part

Claims (4)

A bumper reinforcement extending in the vehicle width direction, a pair of left and right side frames that support the bumper reinforcement via a pair of left and right crash cans, and a vehicle at the tip side portion of the pair of left and right side frames In a vehicle body structure of a vehicle comprising a pair of left and right load transmitting members that respectively protrude from the outer side in the width direction to the outer side in the vehicle width direction.
The proximal end portion of the crash can is inserted and fixed to the distal end portion of the side frame,
In the vertical cross section along the vehicle width direction, the tip portion of the load transmitting member has a pair of spaced apart horizontal plate portions and a vertical plate portion connecting the inner end portions in the vehicle width direction of the pair of horizontal plate portions, respectively. A plurality of U-shaped cross-sections provided, and a connecting plate portion that connects the lateral end portions of the adjacent lateral plate portions of the adjacent U-shaped cross-section portions,
A vehicle body structure for a vehicle, wherein the vertical plate portion is fastened to the side frame by a fastening member.   The vehicle body structure according to claim 1, further comprising an outer plate portion that closes an outer side in the vehicle width direction of the U-shaped cross-sectional portion and forms a closed cross-sectional portion that extends in the front-rear direction of the vehicle body. The side frame is a front side frame,
3. The lowermost U-shaped cross-section portion of the plurality of U-shaped cross-section portions has an extension portion connected to a mount member formed at the lower end portion of the front side frame. The vehicle body structure described in 1.   The load transmitting member overlaps the protruding member attached to the outer side in the vehicle width direction of the front side frame, the extending member extending forward from the front end portion of the apron reinforcement, and the extending member overlapped with the protruding member The vehicle body structure according to claim 3, wherein the vehicle body structure is formed of any one of the superposed members.