JP4259307B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure.

2. Description of the Related Art Conventionally, a technology has been developed that achieves both shock absorption and rigidity of a side member (front side member) in front of a vehicle and improves safety performance of the vehicle when the front of the vehicle collides.
In such a technique, when the front of the vehicle collides, the front side member is formed so as to be accordion-like, so that the shock transmitted to the passenger compartment is absorbed and the periphery of the passenger compartment is formed. By setting the rigidity of the member high, the safety of the vehicle is improved.

As a specific example of the technique for improving the vehicle safety in this way, there is a technique for distributing the impact (load) input to the front side member to the pillar (for example, refer to the technique of Patent Document 1 below).
JP 2000-1537779 A

In the technique of this Patent Document 1, as shown in FIG. 8, the load F input from the front to the front side member 120 is transmitted to the front pillar 122 via the pillar brace 140.
Among these, the pillar brace 140 is joined to the dash cross member 128 at the rear end of the front portion 121a of the front side member 120, and is fixed by a stud bolt or the like.

  However, the cross-section of the pillar brace 140 and the dash cross member 128 is not a quadrangle as shown in FIG. 8, and members having various cross-sectional shapes such as a circle, a hexagon, and an octagon may be used. In such a case, it is difficult to directly fix the pillar brace or the dash cross member to the front side member using a stud bolt or the like.

  The present invention has been devised in view of such a problem, and an object of the present invention is to provide a vehicle body structure that can reliably disperse inputs at the time of a collision with a simple configuration.

In order to achieve the above object, the vehicle body structure of the present invention (Claim 1) is provided with a pillar disposed in the vertical direction of the vehicle body, and disposed behind the dash panel of the vehicle and connecting the pillar and the member member. A cross member, a first bracket fixed to a rear upper surface of the front portion of the member member and a front surface of the dash panel, and the first bracket positioned behind the first bracket and through the dash panel . in the vehicle body structure comprising together is secured to the bracket and a second bracket for holding the cross member is fixed to the front upper surface of the intermediate portion of said frame member, said member element is a longitudinal direction and the vertical direction of the vehicle body A pair of side walls formed along the longitudinal direction of the member member, and the first bracket includes a pair of first side wall portions erected upward. Second The racket has a pair of second side wall portions formed along the longitudinal direction of the member member and erected upward, and the pair of side walls of the member member and the pair of the first bracket The first side wall of the second bracket and the pair of second side walls of the second bracket are configured to coincide with each other in the width direction of the vehicle body , and the cross member is formed by the pair of second side wall portions. It is characterized by being held by a bracket .

  Further, in the configuration according to claim 1, the first bracket includes a first upright portion formed by connecting both rear ends of the pair of first side wall portions and extending in the width direction of the member member, The second bracket is formed over the width direction of the member member by connecting both front ends of the pair of second side wall portions, and is fixed to the first upright portion of the first bracket. It is characterized by having a part (Claim 2).

  Moreover, in the content of Claim 1 or Claim 2, this 1st bracket is formed in the substantially triangle in the side view (Claim 3), It is characterized by the above-mentioned.

According to the vehicle body structure of the present invention, the impact inputted to the member member is fixed to the first bracket fixed to the front surface of the dash panel and the first bracket located behind the first bracket and via the dash panel. Ru is received securely by the second bracket which is. Then, the shock that is received by the first bracket and the second bracket of these, is disposed behind the dash panel, and so be received is transmitted to the pillar via a cross member which is held in the second bracket With a simple configuration, the impact input to the vehicle can be reliably distributed to the pillars. Further, by matching the positions of the first side wall of the first bracket, the second side wall of the second bracket, and the side walls of the member member in the vehicle body width direction, the first bracket and the second bracket are member members when a load is input. It is possible to avoid a situation where the member member enters the inside of the first member or a state where the member member enters the first and second brackets, and the load inputted to the first and second brackets can be reliably transmitted to the pillar. it can. (Claim 1)

  An embodiment of a vehicle body structure of the present invention will be described. 1 to 6 show a vehicle body structure according to an embodiment of the present invention. FIG. 1 is a schematic perspective view showing the configuration of the vehicle body structure of the present invention. FIG. FIG. 3 is a schematic side view showing a vehicle provided with the vehicle body structure of the present invention, and FIG. 4 is a schematic view showing the configuration of the main part viewed from the inside of the vehicle. FIG. 5 is a side view, FIG. 5 is a schematic perspective view showing the configuration of the main part, and FIG. 6 is a schematic cross-sectional view showing the cross section of the main part.

  As shown in FIGS. 1 and 3, two front side members (member members) 1 and 1 are arranged along the longitudinal direction of the vehicle in front of the vehicle to which the vehicle body structure of the present invention is applied. At the same time, pillars (polygonal pillars) 8 extending upwardly of the vehicle body and having a polygonal cross section stand from side sills (not shown) extending in the longitudinal direction of the vehicle on the outer side of the front side member 1 in the vehicle width direction. It is installed. In FIG. 1, the pillar on the left side of the vehicle is not shown. Further, since the front side members 1 and 1 have the same structure and shape, one front side member 1 will be described as an example unless otherwise indicated.

The front side member 1 includes a front portion 1a that extends horizontally in the longitudinal direction of the vehicle, and an intermediate portion 1b that extends obliquely rearward and downward from a first bent portion 1d that is bent downward behind the front portion 1a. And a rear portion 1c extending horizontally rearward from a second bent portion 1e that is bent again in the horizontal direction behind the intermediate portion 1b.
Among these, the front side member 1 adopts a crushable structure so that, when the front of the vehicle collides, as shown in FIG. 3, the front portion 1a is crushed into an accordion shape and can absorb the impact.

Further, as shown in FIG. 6, the cross section of the front side member 1 is U-shaped by flanges 1g, 1g, side walls 1h, 1h, and a bottom surface 1i. The flanges 1g and 1g are formed to have a closed cross section by spot welding.
Further, as shown in FIG. 1, a dash panel 4 is provided on the front side member 1, and this dash panel 4 extends upward from the vicinity of the bent portion 1d of the front side member 1 in a side view shown in FIG. The front panel 4a extends and the floor panel 4b extends obliquely downward and rearward from the bent portion 1d, and forms the front and lower surfaces of the passenger compartment.

  A dash cross member (cross member) 3 is provided on the front side member 1 in the width direction of the vehicle body as shown in FIG. The dash cross member 3 is provided between the left pillar (not shown in FIG. 1) and the left front side member 1, between the left and right front side members 1 and 1, and between the right front side member 1 and the right side member. It arrange | positions over between the pillars 8, and in this embodiment, the cross-sectional shape is integrally formed by the hollow steel pipe (pipe member) with a circular shape.

  Thus, since the pipe member having a hollow cross section is the dash cross member 3, when a load is input from the front side member 1 to the dash cross member 3, the load can be reliably transmitted to the pillar 8, When a larger load is input, the dash cross member 3 is appropriately buckled, so that the safety of the passenger compartment can be improved while absorbing the impact.

  The dash cross member 3 is horizontally installed on the front side members 1 via rear lower brackets (second brackets) 2 and 2 fixed to the front side members 1 and 1, and The ends are bent upward and rearward of the vehicle, and are welded and fixed to the left and right pillars 8 via individual side brackets 9. Since the rear lower brackets 2 and 2 provided corresponding to the left and right front side members 1 and 1 have the same shape and structure, respectively, one lower bracket 2 will be described as an example unless otherwise indicated. .

  The rear lower bracket 2 has a bolt 14 via a floor panel 4b of the dash panel 4 in the vicinity of the bent portion 1d, which is a portion where the load inputted from the front of the vehicle to the front side member 1 is easily transmitted to the dash cross member 3. Is fixed to the front side member 1 and is fixed to the front lower bracket 15 (described later) by spot welding via the front panel 4a of the dash panel 4.

Further, as shown in FIG. 3, a front lower bracket (first bracket) 15 is provided on the upper surface of the rear portion (that is, near the bent portion 1 d) of the front portion 1 a of the front side member 1 with the dash panel 4 interposed therebetween. ing.
As shown in FIG. 6, the front lower bracket 15 is formed along the longitudinal direction of the front side member 1 and has a pair of first side wall portions 15 a and 15 a erected upward, and the first lower side bracket 15. The rear end of the side wall portions 15a and 15a is connected to the first upright portion 15d formed across the width direction of the front side member 1, and is a right triangle in the side view shown in FIG. It is formed so as to have the shape of In the present embodiment, the front lower bracket 15 has a right triangle shape in a side view, but is not strictly limited to such a right triangle, and may have a generally triangular shape. That's fine.

Further, flanges 15b and 15b are formed by bending the lower ends of the first side wall portions 15a and 15a outwardly of the vehicle body by press molding, and the flanges 15b and the flanges 1g and 1g of the front side member 1 are spotted. The front lower bracket 15 is fixed to the front side member 1 by welding.
On the other hand, as shown in FIG. 1, the rear lower bracket 2 is formed along the longitudinal direction of the front side member 1 and is erected upward from the vehicle via the floor panel 4 b of the dash panel 4. Mainly by the second side wall portions 2a, 2a and the second upright portion 2b formed by connecting the front and lower ends of the second side wall portions 2a, 2a and extending in the width direction of the front side member 1. It is configured.

Then, the rear lower bracket 2 is fixed to the front side member 1 by fixing the second upright portion 2 b facing the floor panel 4 b of the dash panel 4 to the intermediate portion 1 b of the front side member 1 with the bolts 14. ing.
Further, as shown in FIG. 6, the width dimension of the front lower bracket 15 (ie, the width dimension between the left and right side walls 15a, 15a) W ₂ is the width dimension of the front side member 1 (ie, the left and right side walls 1h, It is designed to match the width) W ₁ between 1h. Although the rear lower bracket 2 is not shown in FIG. 6 because it is hidden by the front lower bracket 15, the width dimension of the rear lower bracket 2 is also the width dimension of the front lower bracket 15 (ie, W ₂ ). It is designed to be the same.

Further, in the front view as shown in FIG. 6, the central axis AX ₂ of the front lower bracket 15 and the rear lower bracket 2, and by matching the center axis AX ₁ of the front side member 1, the front lower bracket 15 The left and right side walls 15a and 15a and the left and right side walls 2a and 2a of the rear lower bracket 2 are positioned within the plate thickness dimensions 1hW and 1hW of the left and right side walls 1h and 1h of the front side member 1, respectively. Yes.
In other words, the central axis AX ₂ of the front lower bracket 15 and the rear lower bracket 2, by matching the center axis AX ₁ of the front side member 1, the left and right side walls 15a at the front lower bracket 15, 15a and The left and right side walls 2a, 2a of the rear lower bracket 2 and the left and right side walls 1h, 1h of the front side member 1 can be overlapped with each other.

In the present embodiment, the left and right side walls 15a, 15a of the front lower bracket 15 and the left and right side walls 2a, 2a of the rear lower bracket 7 are substantially directly above the left and right side walls 1h, 1h of the front side member 1. It is supposed to be located.
As a result, when a load (impact) is applied to the front lower bracket 15 via the front side member 1, the input load is transferred from the front side member 1 to the front lower bracket 15 and the rear lower bracket 2. Therefore, it can be surely transmitted.

If, sidewall 1h of the left and right in the front side member 1, the width W ₁ between 1h, the sidewalls 15a of the left and right at the front lower bracket 15, so that considerably wider than the width W ₂ between 15a (ie, W ₁ > W ₂ ) and the side walls 1h, 1h are not changed in thickness, the left and right side walls 15a, 15a of the front lower bracket 15 are respectively connected to the front side member 1. However, in this case, the following problems may occur.

  That is, in this case, if an impact is applied to the front side member 1, the impact is transmitted to the front lower bracket 15 via the front side member 1, but the input is directly above the side walls 1h and 1h. Since the side walls 15a and 15a of the front lower bracket 15 which is a member to receive the received impact are not positioned, the side walls 15a and 15a of the front lower bracket 15 are moved to the front side by the impact input to the front side member 1. There is a risk of biting into the hollow portion 1j of the member 1.

Contrary to the above, the width dimension W ₁ between the left and right side walls 1 h, 1 h in the front side member 1 is considerably narrower than the width dimension W ₂ between the left and right side walls 15 a, 15 a in the front lower bracket 15. Assuming that W ₁ <W ₂ is set and the thicknesses of the side walls 1h, 1h are not changed, the left and right side walls 15a, 15a of the front lower bracket 15 are respectively front side members. 1 on the flanges 1g, 1g, or further outward than the flanges 1g, 1g, and the left and right side walls 1h, 1h of the front side member 1 are hollow portions 15c of the front lower bracket 15a. Will be located under. In this case, the following problems may occur.

  That is, similarly to the above example, if an impact is applied to the front side member 1, the impact is transmitted to the front lower bracket 15 via the front side member 1. However, the right and left side walls 15a and 15a of the front lower bracket 15 which is a member to receive the input impact are not positioned directly above these side walls 1h and 1h. 1h and 1h may bite into the hollow portion 15c of the front lower bracket 15.

On the other hand, in the present invention according to the present embodiment, the front lower bracket 15 is fixed to the rear upper surface of the front portion 1a of the front side member 1, and the front lower bracket 15 and the front side member 1 are connected to each other. A rear lower bracket 2 that holds the dash cross member 3 is fixed to the front upper surface of the intermediate portion 1b.
Since the width dimension W ₂ of the front lower bracket 15 and the rear bracket 2 is set to match the width dimension W ₁ of the front side member 1 in the front view as shown in FIG. The lower bracket 15 and the rear lower bracket 2 can reliably receive the load (impact) input to the front side member 1 and transmit the input impact to the dash cross member 3.

Further, the dash cross member 3 held by the rear lower bracket 2 is also fixed to both pillars 8 via the side brackets 9, and it is effective that the front side member 1 is deformed so as to bite into the vehicle interior. Can be prevented.
Here, the pillar 8 shown in FIG. 2 shows a horizontal cross section of the pillar on the left side of the vehicle. The pillar inner 10 facing the vehicle interior, the side panel outer (pillar outer) 11 facing the outside of the vehicle, the pillar inner 10 and the side panel. The reinforcement 12 is interposed between the outer 11 and the reinforcement 12 formed along the surface (inner surface) of the side panel outer 11 on the passenger compartment side, and has a substantially hexagonal shape in plan view.

  Further, in the pillar 8 where the dash cross member 1 is connected, that is, in the position shown in the cross-sectional view of FIG. 2, a local reinforcing member called a bulkhead 13 is built in the pillar 8 so that the pillar 8 is localized. It has come to strengthen. In the cross section shown in FIG. 2, the bulkhead 13 is not continuous, but is continuous above or below the cross section shown in FIG. 2, and a closed cross section is formed as a whole of the bulkhead 13.

  Further, in the present embodiment, the flange portion of the pillar inner 10 in front of the vehicle is the first portion 10a, and the surface extending obliquely rearward from the rear of the first portion 10a to the vehicle interior is the second portion 10b. The surface extending from the rear of the second portion 10b toward the rear of the vehicle is the third portion 10c, the surface extending from the rear of the third portion 10c toward the rear of the vehicle is the fourth portion 10d, and the pillar inner behind the fourth portion 10d. The flange portion is referred to as a fifth portion 10e. Further, the corner portion that is the boundary between the first portion 10a and the second portion 10b is the first corner portion C1, and the corner portion that is the boundary between the second portion 10b and the third portion 10c is the second corner portion C2. A corner that is a boundary between the portion 10c and the fourth portion 10d is referred to as a third corner C3.

A side bracket (bracket) in which one end of the dash cross member 3 is welded to the inner surface of the pillar 8, that is, the inner surface of the first portion 10 a, the second portion 10 b, and the third portion 10 c of the pillar inner 10. 9 is fixed by welding.
As shown in FIGS. 3 and 4, the end of the dash cross member 3 is connected to the corner C <b> 2 of the pillar 8 via the side bracket 9. That is, the second corner portion (predetermined corner portion) C2 is positioned inside the extension line (see the alternate long and short dash line in FIG. 2) obtained by virtually extending the dash cross member 3 in the axial direction as it is (that is, inside the inner diameter d). Thus, the dash cross member 3 is fixed to the pillar 8. Thus, when a load is input to the dash cross member 3, this load is transmitted to the corner portion C2 of the pillar 8, so that it can be reliably received even if a large load is input. This is a setting that focuses on the fact that the strength of the pillar 8 is high at the corners.

  In the present embodiment, in addition to the load input to the dash cross member 3 acting on the second corner C2, the dash cross member 3 can be seen in plan view as shown in FIG. The second portion 10b is fixed in contact with the second portion 10b through a dash cross bracket 9 at a right angle (substantially perpendicular). As a result, the dash cross member 3 can be securely fixed to the pillar 8, and the load input to the dash cross member 3 can be accurately transmitted toward the second corner portion C <b> 2 of the pillar 8. .

  In addition, since the bulkhead 13 is built in the pillar 8 at the location where the dash cross member 3 is connected, that is, the location shown in the cross-sectional view of FIG. 2, the load input to the dash cross member 3 The pillar 8 can obtain an endurable strength. Further, since the bulkhead 13 locally reinforces only the portion where the pillar 8 and the dash cross member 3 are connected via the side bracket 9, the weight of the vehicle body can be increased while increasing the strength of the pillar 8. The increase can be minimized.

  Further, the side bracket 9 interposed between the dash cross member 3 and the pillar 8 has at least two surfaces of the pillar 8 formed of a polygon (in the present embodiment, the first portion 10a and the third portion 10c). The two surfaces are fixed by welding. The side bracket 9 is substantially Z-shaped in the horizontal cross section, and is mainly formed of three parts. In the present embodiment, of the three components of the side bracket 9, the portion fixed to the first portion 10 a of the pillar inner 10 by welding is referred to as a first bracket portion 9 a, and one surface is a dash cross member 3. A portion fixed to the end portion of the pillar inner portion by welding and the other surface abutting against the second portion 10b of the pillar inner 10 is referred to as a second bracket portion 9b, and is a portion fixed to the third portion 10c of the pillar inner 10 by welding. Is referred to as a third bracket portion 9c.

Further, in plan view, the second bracket portion 9b is longer than the entire length of the second portion 10b of the pillar inner 10, and is formed so as to extend beyond the second corner portion C2 to the vehicle interior side.
The third bracket portion 9c bends from the rear of the second bracket portion 9b toward the rear of the vehicle at an angle substantially orthogonal to the second portion 10b of the pillar inner 10, and then extends along the third portion 10c of the pillar inner 10. It is formed by bending.

The first bracket portion 9a is shorter than the second bracket portion 9b and the third bracket portion 9c, and is formed on the inner surface of the first portion 10a of the pillar inner 10 from the front portion of the second bracket portion 9b toward the front of the vehicle. It is formed so as to extend along.
Since the vehicle body structure according to the first embodiment of the present invention is configured as described above, the following effects can be obtained.

  For example, as shown in FIG. 3, when the front of the vehicle collides and an impact (load) is input to the front side member 1 from the front, the impact is dash in the vicinity of the first bent portion 1d of the front side member. The cross member 3 and the middle part 1b of the front side member 1 are distributed. In addition, it is preferable to design so that the shared load of the intermediate part 1b of the front side member 1 and the dash cross member 3 at this time may be about 50:50.

Further, the rear lower bracket 2 that supports the dash cross member 3 is fixed to the upper surface of the first bent portion 1d that is located rearward of the front portion 1a of the front side member 1, so that the front portion 1a of the side member is fixed. There is no negative impact on crushable performance.
Further, the side bracket 9 is fixed at a position where the second corner portion C2 is present in an extension line (see a one-dot chain line in FIG. 2) in which the outer diameter of the dash cross member 3 is virtually extended in the axial direction. Therefore, when a load is input to the dash cross member 3, the load acts toward a predetermined corner portion (here, the second corner portion C2) of the pillar 8.

  Therefore, even when a large load is input to the dash cross member 3 and acts on the pillar 8, the pillar 8 receives such a large load at the second corner C2. It can have sufficient strength to withstand a large load. In addition, when making the intensity | strength of the pillar 8 equivalent to the past, the weight of the pillar 8 can be made light.

  Further, in the present embodiment, in addition to the load input to the dash cross member 3 acting on the second corner portion C2, the dash cross member 3 is shown in the side view in the plan view shown in FIG. The dash cross member 3 is securely fixed to the pillar 8 because the bracket 9 is fixed in contact with the second portion 10b of the pillar inner 10 at a right angle (substantially perpendicular). The dash cross member 3 can be reliably fixed so that the load input to the dash cross member 3 is accurately transmitted toward the second corner C2 of the pillar 8.

Further, since the bulkhead 13 is built in the pillar 8 at the location where the dash cross member is connected, that is, the location shown in the sectional view of FIG. 2, the load input to the dash cross member 3 increases. Even in this case, the pillar 8 can sufficiently withstand this load.
Further, since the bulkhead 13 partially reinforces only the vicinity of the portion where the pillar 8 and the dash cross member 3 are connected via the side bracket 9, the pillar 8 is improved in strength while increasing the strength of the pillar 8. The weight increase of 8 can be minimized.

  The side bracket 9 interposed between the dash cross member 3 and the pillar 8 has at least two surfaces of the pillar 8 (here, two surfaces of the first portion 10a and the third portion 10c of the pillar inner 10). And the load input to the second corner portion C2 of the pillar 8 is distributed to at least two surfaces of the pillar 8 via the bracket 9 since it is welded to one end of the dash cross member 3. The Therefore, the pillar 8 can efficiently receive the input load.

Furthermore, since the dash cross member 3 is formed using a pipe member having a hollow cross section, the load input to the dash cross member 3 can be reliably transmitted to the pillar 8.
Further, the front lower bracket 15 is fixed to the rear upper surface of the front portion 1 a of the front side member 1, and the front lower bracket 15 and the dash cross member 3 are attached to the front upper surface of the intermediate portion 1 b of the front side member 1. The rear lower bracket 2 to be held is fixed, and the side walls 15a and 15a of the front lower bracket 15, the side walls 2a and 2a of the rear lower bracket 2 and the side walls 1h and 1h of the side member 1 are respectively positioned in the vehicle width direction. Therefore, when a load (impact) is input to the front side member 1, the front lower bracket 15 and the rear lower bracket 2 can reliably receive the shock, and the front lower bracket. 15 and the rear lower bracket 2 ensures that the impact received by the dash cross men It is possible to transmit to three. Therefore, the impact input to the front side member 1 is not received by the front side member 1 alone, but is also received by the pillar 8 via the front lower bracket 15, the rear lower bracket 2 and the dash cross member 3. The load input at the time of the collision can be reliably distributed to the pillars 8.

  In addition, the front lower bracket 15 is formed along the longitudinal direction on the front side member 1, and is a pair of first side wall portions 15a and 15a standing upright, and the pair of first side wall portions 15a and 15a. The rear end brackets 2 are formed along the longitudinal direction on the front side member 1. Further, the rear lower bracket 2 is formed along the longitudinal direction on the front side member 1. And a pair of second side wall portions 2a, 2a standing in the vertical direction and a front lower bracket formed across the width direction of the front side member 1 by connecting both front ends of the pair of second side wall portions 2a, 2a. Since the second upright portion 2b fixed to the 15 first upright portions 15d is provided, when a load (impact) is input to the front side member 1, this is input. Load, and the front lower bracket 15 and the rear lower bracket 2 can be received reliably.

Moreover, since the front lower bracket 15 is configured to have a substantially triangular shape in a side view, a load (impact) input to the front side member 1 can be received with a simple structure.
Next, the vehicle body structure of the present invention according to a modification of the above-described embodiment will be described. Since this modification is basically the same as the configuration of the above-described embodiment (see FIGS. 1 to 6), only the portions different from this embodiment will be described with reference to FIG. Further, the same members as those of the above-described embodiment are denoted by the same reference numerals, and only different portions are denoted by different reference numerals.

FIG. 7 is a schematic side view showing a case where the vehicle body structure of the present invention of the present modification is viewed from the inside of the vehicle, and corresponds to FIG. 4 in the above-described embodiment. Further, components different from the above-described embodiment are a side bracket (bracket) 19 and a dash cross member (cross member) 21 .
Among these, the dash cross member 21 according to the present modification has the end surface 21 a formed so as to be perpendicular to the axis of the dash cross member 21. 3 is different.

Further, the side bracket 19 according to this modification has a surface fixed to the dash cross member 21 , that is, a second bracket surface 19 b fixed to the pillar 8 in a side view as viewed from the inside of the vehicle shown in FIG. 7. in position, and is formed so as to abut perpendicularly perpendicular end face 21 a of the dash cross member 21.
Thus, when an impact which is input from the front of the vehicle to the front side member 1 (load) is transmitted to the pillar 8 via the dash cross member 21, it is interposed between the dash cross member 21 and the pillar 8 The second bracket surface 19b of the side bracket 19 is configured to receive the load from the dash cross member 21 vertically.

Therefore, when an impact is applied to the front side member 1, only the compressive force can be applied to the welded portion between the side bracket 9 and the dash cross member 21 (that is, no shear force is applied). The connection strength between the side bracket 19 and the dash cross member 21 can be further improved.
As mentioned above, although one Embodiment of this invention and its modification were demonstrated, this invention is not limited to the embodiment and its modification which concern, It implements in various deformation | transformation in the range which does not deviate from the meaning of this invention. be able to.

For example, the dash cross members 3 and 21 in the above-described embodiment and its modifications are preferably pipe members, but are not limited to such pipe members, and other steel materials may be used.
Moreover, in the above-mentioned embodiment and its modification, it comprised so that the dash panel 4 might interpose between the front lower bracket 15 and the rear lower bracket 2, However, It does not specifically limit to such a structure.

1 is a schematic perspective view showing a configuration of a vehicle body structure according to a first embodiment of the present invention. It is typical sectional drawing which shows the principal part structure of the vehicle body structure concerning 1st embodiment of this invention. 1 is a schematic side view showing a vehicle provided with a vehicle body structure according to a first embodiment of the present invention. It is a typical side view at the time of seeing the important section of the body structure concerning a first embodiment of the present invention from the vehicle inside. 1 is a schematic perspective view showing a configuration of a vehicle body structure according to a first embodiment of the present invention. It is typical sectional drawing which shows the structure of the vehicle body structure concerning 1st embodiment of this invention. It is a typical side view at the time of seeing the principal part of the vehicle body structure concerning the modification of 1st embodiment of this invention from the vehicle inner side. It is a typical side view which shows the prior art.

Explanation of symbols

1 Front side member (member member)
1a Horizontal portion 1b Intermediate portion 2 Rear lower bracket (second bracket)
2a Second side wall portion 2b Second upright portion 3 Dash cross member (cross member)
8 pillar (polygonal pillar)
9 Side bracket 15 Front lower bracket (first bracket)
15a 1st side wall part 15d 1st upright part C2 2nd corner | angular part (predetermined corner | angular part)
W ₁ Front side member width dimensions W ₂ First and second bracket width dimensions

Claims (3)

A member member having a front part extending horizontally from the front to the rear of the vehicle body and an intermediate part bent from the rear part of the front part and extending obliquely downward toward the rear;
Pillars arranged in the vertical direction of the vehicle body;
A cross member disposed behind the dash panel of the vehicle and connecting the pillar and the member member;
A first bracket fixed to a rear upper surface of the front portion of the member member and a front surface of the dash panel ;
A second bracket positioned behind the first bracket and fixed to the first bracket via the dash panel and fixed to the upper surface of the front portion of the intermediate portion of the member member to hold the cross member; In the body structure provided,
The frame member includes a pair of side walls formed along the longitudinal direction and the vertical direction of the vehicle body,
The first bracket has a pair of first side wall portions formed along the longitudinal direction of the member member and erected upward.
The second bracket has a pair of second side wall portions formed along the longitudinal direction of the member member and erected upward.
The pair of side walls of the member member, the pair of first side walls of the first bracket, and the pair of second side walls of the second bracket are configured to coincide with each other in the width direction of the vehicle body ,
The vehicle body structure, wherein the cross member is held by the second bracket by the pair of second side wall portions . The first bracket has a first upright portion that connects both rear ends of the pair of first side wall portions and is formed across the width direction of the member member,
The second bracket is formed over the width direction of the member member by connecting both front ends of the pair of second side wall portions, and is fixed to the first upright portion of the first bracket. The vehicle body structure according to claim 1, further comprising a portion. The vehicle body structure according to claim 1 or 2, wherein the first bracket is formed in a substantially triangular shape in a side view.

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