JP6030001B2 - Front body structure of automobile - Google Patents

Description

  The present invention includes a left and right front pillar, a dash panel disposed between the left and right front pillars, an engine room component extending forward from the left and right front pillars, and the left and right front pillars. The present invention relates to a front body structure of an automobile provided with a cowl box disposed between the engine room components.

  In the front body of a car, rainwater and washing water that has flowed into the cowl box are discharged outside the car. For example, in Patent Document 1, the extension part (11) of the cowl side panel (8) to which the side edge part of the dash panel (1) is joined is joined to the side edge part of the cowl box (7). A drainage port (13) is formed in a portion corresponding to the bottom wall portion of the cowl box (7) of the installation part (11), and rainwater flowing into the cowl box (7) is closed from the drainage port (13). A structure is disclosed in which the fuel is discharged outside the vehicle via (17).

JP-A-8-164873

  By the way, in the said conventional structure, since a drain outlet is formed in the cowl side panel which receives the load at the time of a vehicle collision, this drain outlet part is easy to buckle-deform. For this reason, in order to increase the rigidity of the periphery of the drain outlet, it is necessary to add a reinforcing member or to increase the plate thickness, and there is a problem that the weight and cost increase.

  In addition, when fallen leaves that have entered the cowl box accumulate in the closed cross section, there is a problem that they are difficult to remove.

  The present invention has been made in view of the above-described conventional situation, and can prevent buckling deformation at the time of a vehicle collision without causing an increase in weight and cost, and can be easily removed when fallen leaves accumulate. An object is to provide a front body structure.

  The invention according to claim 1 includes a pair of left and right front pillars in the vehicle width direction, a dash panel disposed between the left and right front pillars, and an engine room extending forward of the vehicle from the left and right front pillars. In the front vehicle body structure of a vehicle comprising a structural member and a cowl box disposed between the left and right engine room structural members, the engine room structural member is disposed on a vehicle width direction side edge of the dash panel. A flange that is joined and fixed to a part of the vehicle is formed toward the rear of the vehicle, and the flange bends and extends obliquely rearward from a general surface in the vicinity of the side edge in the vehicle width direction of the dash panel, and the chamfered portion. And a joint portion that is bent and fixed to a part of the engine room component, and a rear wall portion of the cowl box is formed on the front surface of the upper end of the dash panel. It is if fixed, and a rear wall portion of the cowl box, the chamfered portion of the dash panel, characterized in that opening communicating with the outside by said engine component is formed.

  According to a second aspect of the present invention, in the front body structure of the automobile according to the first aspect, the joint portion of the flange forms at least a part of a pillar inner panel of the front pillar.

  According to the front vehicle body structure of the first aspect of the present invention, the flange formed on the vehicle width direction side edge of the dash panel toward the vehicle rear side is obliquely rearward from the general surface near the vehicle width direction side edge of the dash panel. And a rear wall portion of the cowl box on the front surface of the upper end of the dash panel. Since the opening that communicates with the outside of the vehicle is formed by the rear wall portion, the chamfered portion, and the engine room constituent member of the cowl box, rainwater and washing water that has flowed into the cowl box are removed from the cowl box. It flows into the opening and is discharged outside the vehicle.

  As described above, in the present invention, it is not necessary to provide an opening in the engine room constituent member, so that buckling deformation at the time of a vehicle collision can be prevented without adding a reinforcing member or increasing the plate thickness as in the past. As a result, light weight and low cost can be achieved.

  Further, since the opening communicates with the outside of the vehicle, even if fallen leaves that have entered the cowl box accumulate, they can be easily removed from the opening.

  Since it is not necessary to provide an opening in the engine room constituent member, heat from the engine room does not enter the passenger compartment, and the influence on the cooling performance of the air conditioner can be prevented.

  In the invention of claim 2, since at least a part of the pillar inner panel is formed by the joint portion of the flange, for example, the spot welded portion when joining the flanges of the dash panel and the pillar inner panel can be eliminated, and traveling Sometimes water, dust, or sound can be prevented from entering. As a result, a seal member for sealing the spot welded portion can be eliminated, the cost can be reduced, and spot welding can be eliminated, so that the manufacturing process can be simplified.

1 is a side view of a front body of an automobile according to Embodiment 1 of the present invention. It is a perspective view of the dash panel of the front body. It is a perspective view of the front body. FIG. 4 is a sectional plan view of the front vehicle body (a sectional view taken along line IV-IV in FIG. 2). FIG. 5 is a cross-sectional side view of the front vehicle body (a cross-sectional view taken along line VV in FIG. 4).

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  FIGS. 1 to 5 are views for explaining a front body structure of an automobile according to a first embodiment of the present invention. In this embodiment, front and rear and left and right mean front and rear and left and right as viewed in the forward direction of the automobile.

  In the figure, reference numeral 1 denotes a front body of an automobile, which is disposed between a pair of left and right front pillars 2 extending in the vertical direction of the vehicle, and between the left and right front pillars 2 and an engine room A. A dash panel 3 that defines the passenger compartment B and a rear end of the dash panel 3 are coupled to the left and right front pillars 2, and the left and right cowl side members (engine room constituent members) extending from the front pillar 2 to the front of the vehicle. 4 and a cowl box 5 disposed between the left and right cowl side members 4.

  The left and right cowl side members 4 have a structure in which an inner member 4a and an outer member 4b are joined and fixed to form a closed cross-section box shape. A connecting member 6 is coupled to the front end portions of the left and right cowl side members 4, and the lower end portions of the left and right connecting members 6 are left and right side members 7 extending in the vehicle front-rear direction, respectively. Is bound to.

  The left and right front pillars 2 have a lower side portion 2a extending substantially vertically upward, and an upper side portion 2b extending obliquely upward and rearward following the lower side portion 2a, and the lower side portion 2a includes: The front end of the rocker panel 8 is coupled.

  A windshield 9 is disposed between the upper portions 2b of the left and right front pillars 2, and a hood 10 for opening and closing the engine compartment A is disposed in front of the lower edge of the windshield 9. .

  A strut upper support 13 is disposed at the left and right ends of the dash panel 3. The strut upper support 13 has an upper wall portion 13b formed with a support hole 13a for supporting an upper end portion of a suspension strut connected to a front wheel (not shown), and extends downward following the upper wall portion 13b. A portion (not shown) has a vertical wall portion 13c coupled to the side member 7 (see FIG. 5).

  The cowl box 5 includes a bottom wall portion 5a coupled to the upper wall portion 13b of the strut upper support 13, a front wall portion 5b extending obliquely upward and forward following a front edge of the bottom wall portion 5a, and the bottom It has the rear wall part 5c bent upwards following the rear edge of the wall part 5a.

  The flange portions 5e formed at the left and right edges of the cowl box 5 are fixedly joined to the inner members 4a of the left and right cowl side members 4.

  The dash panel 3 includes a dash panel portion 17 and a flange portion 18 that is bent toward the rear of the vehicle following the left and right edges in the vehicle width direction of the dash panel portion 17. The dash panel portion 17 and the flange portion 18 are configured by integrally forming a single steel plate by press forming.

  A wheel house portion 17a is formed at the left and right lower end portions of the dash panel portion 17 so as to bulge toward the vehicle interior side, and a floor connection portion 17b that is bent and extends toward the passenger compartment B side is formed at the lower edge. Is formed. A floor panel (not shown) is connected to the floor connection portion 17b.

  A brake booster mounting seat 17c bulges toward the passenger compartment B on the driver seat side of the dash panel portion 17, and a steering shaft insertion hole 17d is formed below the brake booster mounting seat 17c. Yes.

  A rear wall portion 13c ′ of the vertical wall portion 13c of the left and right strut upper support 13 is coupled to the upper portion 17e of the dash panel portion 17. The vertical wall portion 13 c on the vehicle outer side of the strut upper support 13 is coupled to the inner member 4 a of the cowl side member 4, and the front vertical wall portion 13 c is coupled to the connecting member 6.

  An extension 17f extending upward is formed on the upper portion 17e of the dash panel portion 17, and a rear wall portion 5c of the cowl box 5 is coupled to the extension 17f.

  A reinforcing bead 17h extending substantially the entire length in the vehicle width direction is formed on the extension portion 17f of the dash panel portion 17, and a vertical bead 17j extending in the vertical direction is formed at the center portion in the vehicle width direction.

  The flange portion 18 includes a chamfered portion 18a that bends and extends obliquely rearward from a general surface near the side edge of the dash panel portion 17, and a joint portion 18b that bends and extends rearward after the chamfered portion 18a. .

  The joint 18b forms a pillar inner panel of the front pillar 2, and a pillar rein hose 19 having a hat-shaped cross section is interposed on the vehicle exterior side of the joint 18b as shown in FIG. An outer panel 20 is provided.

  The front and rear flanges 19a and 20a of the pillar rein hose 19 and the pillar outer panel 20 are integrally joined and fixed to the joint 18b, whereby the front pillar 2 has a rectangular tube-like closed cross-sectional structure extending upward. Have.

  The rear end of the inner member 4a of the cowl side member 4 is coupled between the joint 18b and the front flange 19a, and the rear end of the outer member 4b is coupled to the outer wall of the pillar outer panel 20. .

  The chamfered portion 18a is formed by bending the left and right end portions of the dash panel portion 17 about 40 degrees toward the vehicle interior side, and extends in a substantially triangular shape toward the vehicle interior side obliquely downward. Yes. Here, the chamfered portion 18a may be formed by one plane or a plurality of surfaces.

  A front corner portion 18d of the chamfered portion 18a is in contact with a coupling portion between the cowl box 5 and the strut upper support 13, and a rear corner portion 18e is formed at a coupling portion between the cowl side member 4 and the front pillar 2. They are in contact (see FIG. 4A).

  A pair of upper and lower horizontal beads 18f are formed at the upper end of the chamfered portion 18a. Each horizontal bead 18f is formed so as to bridge the dash panel portion 17 and the joint portion 18.

  Drain holes 5g are formed at the left and right ends of the rear wall portion 5c of the cowl box 5. A cutout hole 5h is formed in the left and right lower corners of the rear wall portion 5c so as to continue to the bottom wall portion 5a.

  When viewed from above the vehicle, the chamfered portion 18a, the cowl side member 4, and the rear wall portion 5c of the cowl box 5 form a triangular opening 23 that communicates with the outside of the vehicle.

  Rain water and washing water (see arrows a in FIGS. 3 and 4) flowing into the cowl box 5 flow into the opening 23 from the left and right drain holes 5g of the cowl box 5 and below the opening 23. It is discharged out of the vehicle through a fender liner (not shown) that is positioned. Further, the water remaining on the bottom wall portion 5a in the cowl box 5 is drained into the opening 23 from the notch hole 5h.

  According to this embodiment, the flange portion 18 formed rearwardly on the left and right edges of the dash panel portion 17 in the vehicle width direction is bent obliquely rearward from the general surface near the side edge of the dash panel portion 17. A chamfered portion 18a that extends and a joint 18b that bends and extends rearward after the chamfered portion 18a, and the rear wall 5c of the cowl box 5 is joined and fixed to the extended portion 17f of the dash panel portion 17. Since the opening 23 communicating with the outside of the vehicle is formed by the rear wall portion 5c of the cowl box 5, the chamfered portion 18a, and the cowl side member 4, the rainwater flowing into the cowl box 5 and washing as described above Water flows from the drain hole 5g and the cutout hole 5h of the cowl box 5 into the opening 23 and is discharged outside the vehicle.

  Thus, in this embodiment, since it is not necessary to provide an opening in the cowl side member 4, buckling deformation at the time of a vehicle collision can be achieved without adding a reinforcing member or increasing the plate thickness as in the prior art. Can be prevented, and as a result, light weight and low cost can be achieved.

  Further, since the opening 23 communicates with the outside of the vehicle, even if fallen leaves that have entered the cowl box 5 accumulate, they can be easily removed from the opening 23.

  Further, since it is not necessary to provide an opening in the cowl side member 4, heat from the engine compartment A does not flow into the passenger compartment B, and the influence on the cooling performance of the air conditioner can be prevented.

  In this embodiment, since the pillar inner panel is formed by the joint portion 18b of the flange portion 18, for example, the spot welded portion when joining the flanges of the dash panel and the pillar inner panel can be eliminated, and the water is It is possible to prevent dust, dust, or sound from entering. As a result, a seal member for sealing the spot welded portion can be eliminated, the cost can be reduced, and spot welding can be eliminated, so that the manufacturing process can be simplified.

  Further, since the welded portion can be eliminated, the corner portion between the dash panel portion 17 and the flange portion 18 does not open when the vehicle collides, and the collision energy can be efficiently transmitted to the rear portion of the vehicle body.

1 Front body 2 Front pillar 3 Dash panel 4 Cowl side member (engine room component)
5 Cowl box 5c Rear wall 17 Dash panel 17f Extension (upper end)
18 Flange 18a Chamfer 18b Joint 23 Opening

Claims (2)

A pair of left and right front pillars in the vehicle width direction, a dash panel disposed between the left and right front pillars, an engine room component extending forward from the left and right front pillars, and the left, In the front vehicle body structure of a car provided with a cowl box disposed between the right engine room components,
On the side edge of the dash panel in the vehicle width direction, a flange that is joined and fixed to a part of the engine room component is formed toward the rear of the vehicle,
The flange has a chamfered portion that is bent and extended obliquely rearward from a general surface near the side edge in the vehicle width direction of the dash panel, and is bent and formed following the chamfered portion. Having a joined portion,
The rear wall portion of the cowl box is bonded and fixed to the front surface of the upper end portion of the dash panel,
A front body structure of an automobile, wherein an opening communicating with the outside of the vehicle is formed by a rear wall portion of the cowl box, a chamfered portion of the dash panel, and the engine room constituent member. The front body structure of an automobile according to claim 1,
A front body structure of an automobile, wherein the joint portion of the flange forms at least a part of a pillar inner panel of the front pillar.

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