JP4438416B2 - Front body structure of the vehicle - Google Patents

Description

  The present invention relates to a front body structure of a vehicle, and more particularly to a front body structure of a vehicle that improves side collision performance of the vehicle.

  Conventionally, the following Patent Document 1 has been proposed as a technique for improving the side collision performance of a vehicle.

  In this patent document 1, the front pillar and the side sill, and the dash panel (toe board in the literature) are connected by a single gusset member, so that the front pillar and the side sill are prevented from falling into the passenger compartment, and the dash panel. It is intended to prevent crushing.

JP-A-8-26139.

  Certainly, if the three members extending in three directions as in the above-mentioned Patent Document 1 are connected by a single gusset member, a three-dimensional closed cross section is formed at the corner portion at the front lower end of the passenger compartment. The rigidity of the lower end of the pillar is increased, and the effect of reducing the displacement of the front pillar at the time of a side collision can be obtained.

However, the dash panel, since a panel member unlike the other two members, less rigid with respect to the input load that is not orthogonal with dash panel, in the structure of Patent Document 1 described above, corresponding to the charge amount to the side impact I couldn't say.

  Therefore, it is conceivable to provide a member member extending in the vehicle width direction on the dash panel and to connect the gusset member to this member member.

  In this case, in consideration of the connection with the gusset member, a cross member member extending in the vehicle width direction is provided at substantially the same height as the side sill at the lower end of the dash panel, and a configuration in which the gusset member is connected to the cross member member is adopted. Seems desirable.

  However, when the height position of the cross member member is set to substantially the same height as the side sill (lower end position of the front pillar), the following problem occurs.

  In other words, since the side collision load is input from a position higher than the side sill, in order to prevent the front pillar from falling, the rigid member member, that is, the plate thickness is increased in consideration of the offset amount. It is necessary to provide a member member that has been increased, but if such a member member having an increased plate thickness is provided, the weight of the vehicle body inevitably increases.

  In particular, this problem is conspicuous in a vehicle body structure such as a so-called open car that does not include a roof panel, that is, a vehicle body structure that can support the fall of the front pillar only at its lower end.

  Accordingly, the present invention provides a front body structure of a vehicle that can reduce the weight of the vehicle body while reliably preventing the front pillar from collapsing during a side collision in the front body structure of the vehicle. With the goal.

The vehicle front body structure according to the present invention has a dash panel extending in the vehicle width direction in front of the passenger compartment, a front pillar extending in the vertical direction on the front side of the passenger compartment, and extending rearward from the lower end of the front pillar. A vehicle front body structure including a side sill, provided on the dash panel and extending in a vehicle width direction at a position higher than the position of the side sill, and the dash cross member on the front sill A gusset member for connecting the pillar and the side sill is provided, and the side sill includes a side sill upper provided on the upper side and a side sill lower provided on the lower side, and the side sill lower is set thinner than the side sill upper, The gusset member is fixed only to the side sill upper .

  According to the above configuration, the dash cross member extending in the vehicle width direction is set to a position higher than the position of the side sill, and the front pillar and the side sill are connected to the dash cross member set to the high position by the gusset member. The amount of vertical offset between the load input point at the time of a side collision and the support point (installation position) of the dash cross member that supports the front pillar can be reduced.

  Thus, by reducing the amount of offset in the vertical direction, the rigidity and strength necessary to prevent the front pillar from falling can be reduced as compared with the case where the offset amount is large.

  Therefore, even if the thickness of the dash cross member is not so thick, it is possible to reliably prevent the front pillar from collapsing during a side collision.

Moreover, the side sill includes a side sill upper provided on the upper side and a side sill lower provided on the lower side, the side sill lower is set to be thinner than the side sill upper, and the gusset member is fixed only to the side sill upper. Is.

In this way, the side sill upper that fixes the gusset member is set to a predetermined plate thickness, while the side sill lower that does not fix the gusset member is set thinner than the side sill upper to transmit the load of the side collision. While securing the rigidity of the side sill involved in the side sill upper, it is possible to reduce the weight of the side sill with the side sill lower.

Therefore, also in this case, the weight of the vehicle body can be reduced while reliably preventing the front pillar from falling down in the event of a side collision.

  In one embodiment of the present invention, the dash cross member is provided on the passenger compartment side of the dash panel.

  According to the above configuration, by providing the dash cross member on the passenger compartment side of the dash panel, the dash cross member can be positioned at the rear side of the dash panel, that is, at a position where the offset amount is small in the vehicle front-rear direction. Therefore, the offset amount in the vehicle front-rear direction between the load input point of the side collision and the support point (installation position) of the dash cross member that supports the front pillar can be reduced.

  Therefore, also in this case, it is possible to reliably prevent the front pillar from collapsing at the time of a side collision without increasing the thickness of the dash cross member so much.

  Therefore, in this case as well, the weight of the vehicle can be reduced while reliably preventing the front pillar from collapsing during a side collision.

  In one embodiment of the present invention, the gusset member is provided with a bead portion extending from the front pillar and side sill side to the dash cross member side.

  According to the above configuration, the gusset member that transmits the side collision load from the front pillar and side sill side to the dash cross member side is formed with a beat portion that extends in the same direction as the load transmission direction. It is possible to increase the rigidity in the load transmission direction without increasing the thickness.

  Therefore, it is possible to reliably transmit the side collision load to the dash cross member without increasing the thickness of the gusset member.

  Therefore, also in this case, the weight of the vehicle body can be reduced while reliably preventing the front pillar from falling down in the event of a side collision.

  In one embodiment of the present invention, the dash cross member is connected to the front end of a tunnel portion that extends in the vehicle front-rear direction by raising the floor panel on the lower surface of the passenger compartment at the center in the vehicle width direction. .

  According to the above configuration, the side sill, the front pillar, the gusset member, the dash cross member, and the tunnel portion form a substantially Γ shape in plan view of the vehicle, so the side collision load is tunneled through the dash cross member. Can be transmitted to the part. For this reason, since the load of a side collision can be received in the whole vehicle, the rigidity with respect to a side collision can be improved even if the board thickness of the lower part of a front pillar is not made so thick.

Therefore, also in this case, while preventing reliably the collapse of the front pillar upon lateral collision, Ru can reduce the weight of the vehicle weight.

  In one embodiment of the present invention, a shelf that extends inward in the vehicle width direction is formed on the side sill upper, and the gusset member is fixed to the shelf by a fastening member that extends substantially in the vertical direction. Is.

  According to the above configuration, the shelf is formed on the side sill upper, and the gusset member is fixed by the fastening member extending in the substantially vertical direction, whereby the fastening direction of the gusset member with respect to the side sill is orthogonal to the input direction of the side collision load. Can be set to.

  In this way, by setting the fastening direction to be orthogonal to the side collision load, the load is input to the fastening member in a substantially shearing direction at the time of a side collision, so that the fastening member does not loosen. The side collision load is reliably transmitted to the gusset member.

  Therefore, the side collision load transmission performance is improved, and the side collision performance can be further enhanced.

  According to the present invention, the dash cross member extending in the vehicle width direction is set at a position higher than the position of the side sill, and the front pillar and the side sill are connected to the dash cross member set at the high position by the gusset member. The amount of vertical offset between the load input point at the time of a side collision and the support point (installation position) of the dash cross member that supports the front pillar can be reduced. For this reason, the rigidity and strength necessary for preventing the front pillar from falling down can also be reduced as compared with the case where the offset amount is large.

  Therefore, even if the thickness of the dash cross member is not so thick, it is possible to reliably prevent the front pillar from collapsing during a side collision.

  Therefore, according to the present invention, it is possible to provide a front vehicle body structure of a vehicle that can reduce the weight of the vehicle body while reliably preventing the front pillar from collapsing during a side collision.

In addition, the side sill includes a side sill upper provided on the upper side and a side sill lower provided on the lower side, the side sill lower is set to be thinner than the side sill upper, and the gusset member is fixed only to the side sill upper. Is.

In this way, the side sill upper that fixes the gusset member is set to a predetermined plate thickness, while the side sill lower that does not fix the gusset member is set thinner than the side sill upper to transmit the load of the side collision. While securing the rigidity of the side sill involved in the side sill upper, it is possible to reduce the weight of the side sill with the side sill lower.

Therefore, in this case as well, there is an effect that the weight of the vehicle body can be reduced while reliably preventing the front pillar from collapsing during a side collision.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an overall perspective view of the front vehicle body structure of the present embodiment as viewed from the passenger compartment side. Note that the vehicle of this embodiment is a so-called open car that does not include a roof panel, and is configured to absorb all collision loads with the lower vehicle body that is an underbody.

As shown in FIG. 1, the dash panel 1 constituting the vehicle compartment front wall, in the vehicle width direction, extends or One vertical direction, the vehicle width direction center, to accommodate the lower to the tunnel portion 2 below the upper And a convex portion 1a that protrudes toward the rear side of the vehicle.

  A dash cross member 3 extending in the vehicle width direction is joined to the center position in the vertical direction of the dash panel 1 on the vehicle compartment side (vehicle rear side). The dash cross member 3 forms a closed cross section with the dash panel 1 and is joined to a height substantially coincident with the rear end of the front frame 4 (see FIG. 4). Is joined to the front end of the tunnel portion 2 described later.

Further, the lower end of the dash panel 1 is joined to the floor panel 5 constituting the cabin floor in the vehicle widthwise direction, or One vehicle longitudinal extending direction. A tunnel portion 2 that protrudes upward and extends in the vehicle front-rear direction is formed at the center of the floor panel 5 in the vehicle width direction. In front of the tunnel portion 2, for accommodating the inner (vehicle exterior) to a portion of the power unit such as an engine, a transmission (not shown), increasing the amount of projection of the upper and the vehicle width direction It is set.

  Further, a tunnel member 6 and a tunnel reinforcement 7 extending in the vehicle front-rear direction are joined above the tunnel portion 2. Among these, the tunnel reinforcement 7 is joined to the dash panel 1 side from the vehicle rear side from the vehicle width direction center end portion 31 of the dash cross member 3 at the front end of the joining flange 71. The left and right dash cross members 3 and 3 are connected to each other by the front end.

  An insertion hole 6a is formed in the center of the tunnel member 6 for inserting a shift lever (not shown) extending from the transmission.

On the upper surface of the floor panel 5 is joined to the floor member 9 which extends the Activity connecting side sills 8 below the tunnel portion 2 in the vehicle width direction in left and right.

  And the side sill 8 extended in the vehicle front-back direction is joined to the both ends of the floor panel 5. As shown in FIG. The side sill 8 has a closed cross section composed of a side sill inner 81 and a side sill outer 82 (see FIG. 3). Of these, the side sill inner 81 includes a side sill inner upper 81a provided on the upper side and a side sill provided on the lower side. It is comprised by the inner lower 81b.

Further, the front portion above the side sill 8, arranged so as to extend the cowl side panel 10 forming the front side wall of the cabin above, on whether One vehicle longitudinal direction and a front pillar extending in the vertical direction to the rear 11 is arranged.

  A front door (not shown) is disposed on the vehicle rear side of the front pillar 11, and the front door is supported by a door hinge (not shown) provided on the front pillar 11.

  A side sill rain 80 extending upward from the inside of the side sill 8 is joined to the passenger compartment side of the front pillar 11 to enhance the coupling strength between the side sill 8 and the lower end of the front pillar 11.

As shown in FIG. 3, the outer side end portion 32 of the dash cross member 3, the lower end portion of the front pillar 11, and the front end portion of the side sill 8 are connected to each other at the corner portion at the front end of the passenger compartment thus configured . A cowl side gusset 12 is provided. The cowl side gusset 12 is composed of a single panel member, and is fastened and fixed to the above-described members 3, 8, and 11 by bolt / nut screw fastening members 13.

  The cowl side gusset 12 will be described in detail below with reference to the drawings. 2 is a perspective view of the cowl side gusset 12, FIG. 3 is a sectional view taken along the line AA in FIG. 1, FIG. 4 is a sectional view taken along the line BB in FIG. 1, and FIG. It is a single item perspective view of the dash cross member 3 which fastens the side gusset 12.

  As described above, the cowl side gusset 12 is fastened to the dash cross member 3, the front pillar 11, and the side sill 8. The fastening to each of the cowl side gusset 12 is a fastening hole 15 formed in the outer peripheral fastening flange portion 14, Are inserted through the bolt / nut screw fastening members 13.

That conclusion, as shown in FIG. 2, is fastened to the dash cross member 3 by the upper and lower two fastening holes 15 positioned on the front side of the vehicle, with two fastening holes 15 located on the rear side, One or upward to the front pillar 11 It is, are fastened by two fastening holes 15 located on the rear side, one or downward to the side sill 8. In addition, the fastening hole 15 above the center is configured to be fastened to a gusset member 16 (see FIG. 4) provided between the cowl side panel 10 and the cowl side gusset 12.

At the center of the cowl side gusset 12, the bulging portion 17 which bulges inclined provided, in the engaged state, the dash cross member 3, the dash panel 1, side sill 8, the cowl side panel 10 and front pillar A three-dimensional substantially closed cross-section is formed with 11 or the like.

  Thus, the rigidity of the lower end of the front pillar 11 can be enhanced by forming a three-dimensional substantially closed cross section at the corner portion at the front end of the passenger compartment.

Furthermore, this center of the bulging portion 17, the dash cross member 3 side from the side sill 8 and the front pillar 11 side and the bead portion 18 extending obliquely upward to the two upper and lower forming. The bead portion 18 increases the rigidity of the cowl side gusset 12 in the obliquely upward direction compared to other directions without increasing the plate thickness.

  In addition, since the rear end of the front frame 4 is joined to the vehicle front side of the dash panel 1 where the dash cross member 3 is installed as described above, the load is applied to the front in the event of a frontal collision of the vehicle. It is transmitted from the frame 4 to the dash cross member 3 and further transmitted to the front pillar 11 and the like via the cowl side gusset 12. For this reason, even in the case of a frontal collision, the cowl side gusset 12 can contribute to the improvement of the vehicle body rigidity.

  Next, the peripheral members for fastening the cowl side gusset 12 will be described more specifically.

First, as shown in FIG. 5, the dash cross member 3 is provided with a joint flange 33 on the outer peripheral edge thereof and a bulging portion 34 extending in the vehicle width direction at the center. Then, the vehicle outer side end portion 32 of the bulge portion 34 is provided for both the upper and lower fastening nut 13a, it constitutes a resulting so that signed a cowl side gussets 12.

  As described above, the dash cross member 3 is arranged on the vehicle compartment side of the dash panel 1 and so as to extend in the vehicle width direction at the approximate center in the vertical direction. As is apparent from FIG. 3, this arrangement position is set higher than the position of the side sill 8 and higher than the lower end of the front pillar 11.

  By arranging the dash cross member 3 in this way, the offset amount between the arrangement position of the dash cross member 3 and the load input point of the side collision (the arrow point in FIG. 3) is set to the height position (dash) of the side sill 8. Compared with the case where it is arranged at the lower end position of the panel 1, it can be made smaller. By reducing the offset amount in this way, it is possible to ensure rigidity that can withstand a side collision load input from the front pillar 11 without increasing the thickness of the dash cross member 3 so much.

  Further, since the dash cross member 3 is arranged on the vehicle compartment side of the dash panel 1, the dash cross member 3 is arranged on the vehicle rear side as compared with the case where the dash cross member 3 is arranged on the vehicle rear side. Also in the front-rear direction, the offset amount with the front pillar 11 can be reduced.

  Thus, by reducing the offset amount also in the vehicle front-rear direction, it is possible to secure rigidity capable of withstanding a side collision load input from the front pillar 11 without increasing the thickness of the dash cross member 3. Can do.

  Thus, by setting the arrangement position of the dash cross member 3, it is possible to ensure rigidity that can withstand a side collision load without increasing the thickness of the dash cross member 3. The weight of the vehicle body can be reduced while reliably preventing the pillar 11 from falling down.

  The side sill 8 is configured by dividing the side sill inner 81 into a side sill inner upper 81a and a side sill inner lower 81b as described above. The side sill inner upper 81a and the side sill inner lower 81b are each formed of a steel plate having a thickness of 2.0 mm and 1.2 mm, respectively.

  Among these, the side sill inner upper 81 a is formed with a shelf 83 extending substantially in the vehicle width direction, and the cowl side gusset 12 is fastened and fixed on the upper surface of the shelf 83. The cowl side gusset 12 is fastened by a bolt / nut screw fastening member 13 extending in a substantially vertical direction. The fastening direction of the screw fastening member 13 is slightly higher in the passenger compartment in consideration of fastening work. It is inclined to the side.

  As described above, the side sill inner 81 is divided into upper and lower parts, and the side sill inner lower 81b is made thinner than the side sill inner upper 81a to which the cowl side gusset 12 is fixed. While ensuring the transmission rigidity of the side sill 8, the weight of the vehicle body can be reduced.

  The above-mentioned plate thickness is only an example, and the same effect can be obtained if the side sill inner lower 81b is set thinner than the plate thickness of the side sill inner upper 81a such as a plate thickness of 1.5 mm.

In addition, the cowl side gusset 12 is fastened and fixed to the shelf 83 of the side sill inner upper 81a by the bolt / nut screw fastening member 13 extending substantially in the vertical direction, so that the fastening direction and the load input direction of the side collision are determined. It can be set to be substantially orthogonal.

  In this way, by setting the fastening direction, a load is input to the bolt / nut screw fastening member 13 in the shear direction at the time of a side collision, so that the bolt / nut screw fastening member 13 is loosened. A side collision load is reliably transmitted to the cowl side gusset 12 without being generated.

  Therefore, the transmission performance of the side collision load is reliably ensured, and the side collision performance can be enhanced.

  The front pillar 11 includes a pillar outer 11a and a pillar inner 11b, and the side sill rain 80 is joined to the pillar inner 11b. The side sill rain 80 and the pillar inner 11b are fastened to the cowl side gusset 12 via a bolt / nut screw fastening member 13 extending in the vehicle width direction.

  Thus, the side collision load input to the front pillar 11 is surely input to the cowl side gusset 12 by fastening the side sill rain 80 and the pillar inner 11b to the cowl side gusset 12. Therefore, since the load is reliably transmitted from the cowl side gusset 12 to the dash cross member 3, the front pillar 11 can be reliably prevented from falling as described above.

  Next, the operation and effect of the present embodiment configured as described above will be described in detail.

  The front body structure of the vehicle according to this embodiment includes a dash panel 1 that extends in the vehicle width direction in front of the passenger compartment, a front pillar 11 that extends in the vertical direction on the front side of the passenger compartment, and a lower end of the front pillar 11. A dash cross member 3 provided in the dash panel 11 and extending in the vehicle width direction at a position higher than the position of the side sill 8. The dash cross member 3 is provided with a cowl side gusset 12 for connecting the front pillar 10 and the side sill 8 to each other.

  According to the above configuration, the dash cross member 3 extending in the vehicle width direction is set at a position higher than the position of the side sill 8, and the front pillar 11 and the side sill 8 are cowled to the dash cross member 3 set at the high position. Since they are connected by the side gusset 12, the amount of vertical offset between the load input point at the time of a side collision and the support point (installation position) of the dash cross member 3 that supports the front pillar 11 can be reduced.

  In this way, by reducing the amount of offset in the vertical direction, the rigidity and strength necessary to prevent the front pillar 11 from falling can be reduced as compared with the case where the offset amount is large.

  Therefore, even if the thickness of the dash cross member 3 is not so thick, it is possible to reliably prevent the front pillar 11 from falling down during a side collision.

  Therefore, according to the present embodiment, even in an open car that needs to absorb all collision loads with the underbody, it is possible to reliably prevent the front pillar 11 from collapsing during a side collision while maintaining the weight of the vehicle body. Weight reduction can be achieved.

  In this embodiment, the dash cross member 3 is provided on the vehicle compartment side of the dash panel 1.

  According to the above configuration, by providing the dash cross member 3 on the passenger compartment side of the dash panel 1, the dash cross member 3 is positioned on the vehicle rear side of the dash panel 1, that is, at a position where the offset amount is small in the vehicle front-rear direction. Therefore, the offset amount in the vehicle front-rear direction between the load input point of the side collision and the support point (installation position) of the dash cross member 3 that supports the front pillar 11 can be reduced.

  Therefore, the present embodiment can reliably prevent the front pillar 11 from falling down in the event of a side collision even if the thickness of the dash cross member 3 is not so thick.

  Therefore, it is possible to further reduce the weight of the vehicle body while reliably preventing the front pillar 11 from collapsing during a side collision.

  Further, in this embodiment, the cowl side gusset 12 is provided with a bead portion 18 that extends from the front pillar 11 and the side sill 8 side toward the dash cross member 3 side.

  According to the above configuration, the cowl side gusset 12 that transmits the side collision load from the front pillar 11 and the side sill 8 side to the dash cross member 3 side is formed with the beat portion 18 that extends in the same direction as the load transmission direction. The rigidity in the load transmission direction can be increased without increasing the thickness of the cowl side gusset 12.

  Therefore, the side collision load can be reliably transmitted to the dash cross member 3 even if the thickness of the cowl side gusset 12 is not so thick.

  Therefore, in this embodiment, the weight of the vehicle body can be reduced while reliably preventing the front pillar 11 from falling down during a side collision.

  Further, in this embodiment, the dash cross member 3 is connected to the front end of the tunnel portion 2 that extends in the vehicle front-rear direction by raising the floor panel 5 on the lower surface of the passenger compartment at the center in the vehicle width direction. is there.

According to the above configuration, the side sill 8, the front pillar 11, cowl side gussets 12, the dash cross member 3, by and tunnel portion 2, since that will constitute a substantially Γ-shaped in plan view of the vehicle, the load of the side collision Can be transmitted to the tunnel part 2 through the dash cross member 3. For this reason, since the load of a side collision can be received in the whole vehicle, the rigidity with respect to a side collision can be improved even if the board thickness of the lower part of the front pillar 11 is not made so thick.

  Therefore, this embodiment can also reduce the weight of the vehicle body while reliably preventing the front pillar 11 from collapsing during a side collision.

  In addition, since the left and right dash cross members 3 and 3 are connected by the tunnel reinforcement 2, one side collision load can be transmitted to the other dash cross member 3, so that the front can be more reliably connected. The fall of the pillar 11 can be prevented.

  In this embodiment, the side sill inner 81 includes a side sill inner upper 81a provided on the upper side and a side sill inner lower 81b provided on the lower side. The side sill inner lower 81b is thinner than the side sill inner upper 81a. In addition to the setting, the cowl side gusset 12 is fixed only to the side sill inner upper 81a.

  According to the above configuration, the side sill inner upper 81a that fixes the cowl side gusset 12 is set to a predetermined thickness, while the side sill inner lower 81b that does not fix the cowl side gusset 12 is thicker than the side sill inner upper 81a. By setting it thin, it is possible to reduce the weight of the side sill 8 with the side sill inner lower 81b while securing the rigidity of the side sill 8 involved in the transmission of the load of the side collision with the side sill inner upper 81a.

  Therefore, this embodiment can also reduce the weight of the vehicle body while reliably preventing the front pillar 11 from falling over in the case of a side collision.

  In this embodiment, since it is assumed that the side sill 8 is composed of two parts of the side sill outer 82 and the side sill inner 81, the side sill inner 81 is divided. However, the side sill outer 82 is also configured integrally. If there is, the side sill 8 may be divided up and down across the outer side of the side sill.

  Further, in this embodiment, a shelf 83 extending inward in the vehicle width direction is formed in the side sill inner upper 81a, and the cowl side gusset 12 is bolts extending substantially vertically with respect to the shelf 83. / Fixed by a screw fastening member 13 of the nut.

  According to the above configuration, the side sill 8 of the cowl side gusset 12 is formed by forming the shelf 83 on the side sill inner upper 81a and fixing the cowl side gusset 12 by the bolt / nut screw fastening member 13 extending in the substantially vertical direction. Can be set so as to be substantially orthogonal to the input direction of the side collision load.

  Thus, by setting the fastening direction so as to be substantially orthogonal to the side collision load, the load is input to the bolt / nut screw fastening member 13 in a substantially shearing direction at the time of the side collision, The screw fastening member 13 is not loosened, and the side collision load is reliably transmitted to the cowl side gusset 12.

  Therefore, the side collision load transmission performance is improved, and the side collision performance can be further enhanced.

  In this embodiment, the open car body structure has been described. However, the present invention is not limited to this, and the present invention may be applied to a general body structure.

Configuration of the onset bright, in correspondence with the above embodiment,
The gusset member of the present invention corresponds to the cowl side gusset 12 of the embodiment,
Similarly, the side sill upper corresponds to the side sill inner upper 81a ,
Side sill lower corresponds to side sill inner lower 81b,
The present invention is not limited to the configuration of the above-described embodiment, but includes various other embodiments.

The whole perspective view which looked at the front body structure which adopted the present invention from the compartment side. Single item perspective view of cowl side gusset. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a cross-sectional view taken along line B-B in FIG. 1. Single item perspective view of a dash cross member.

DESCRIPTION OF SYMBOLS 1 ... Dash panel 3 ... Dash cross member 8 ... Side sill 11 ... Front pillar 12 ... Cowl side gusset (gusset member)
81a ... Side sill inner upper (side sill upper)
81b ... Side sill inner lower (Side sill lower)

Claims (5)

A front vehicle body structure including a dash panel extending in the vehicle width direction in front of the passenger compartment, a front pillar extending in the vertical direction on the front side of the passenger compartment, and a side sill extending rearward from the lower end of the front pillar. Because
A dash cross member provided in the dash panel and extending in a vehicle width direction at a position higher than the position of the side sill;
The dash cross member is provided with a gusset member for connecting the front pillar and the side sill ,
The side sill comprises a side sill upper provided on the upper side and a side sill lower provided on the lower side,
The side sill lower is set thinner than the side sill upper,
A vehicle front body structure in which the gusset member is fixed only to a side sill upper . The vehicle front body structure according to claim 1, wherein the dash cross member is provided on a vehicle compartment side of the dash panel. The vehicle front body structure according to claim 1, wherein the gusset member is provided with a bead portion extending from the front pillar and side sill side toward the dash cross member side. The front body of a vehicle according to claim 1 or 2, wherein the dash cross member is connected to a front end of a tunnel portion that extends in the vehicle front-rear direction by raising a floor panel on the lower surface of the passenger compartment upward in the vehicle width direction central portion. Construction. A shelf extending inward in the vehicle width direction is formed in the side sill upper,
Said gusset member, with respect to the shelf portion, the front body structure of a vehicle according to any one of the substantially vertically <br/> claim is fixed by a fastening member extending 1-4.

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