JPS59186779A - Front body structure of automobile - Google Patents

Abstract

PURPOSE:To increase the strength of a cowl and facilitate related work, by using a prescribed cross member to reinforce the upper panel of a dash-board at the cowl, coupling the cross member to the rear wall of the panel, and providing openings extending through the cross member and the panel. CONSTITUTION:At the cowl of a front body structure for an automobile, a front pillar 4 is made of an inner part 13 and an outer part 14 which are coupled to each other so that a closed cross section is defined inside them. The sideward end of the rear wall 9 of the upper panel 8 of a dash-board is coupled to the front edge of the inner part 13. An opening 15 is provided in the rear wall 9. A cross member 20 is provided along the driver room side of the wall 9 so that the cross member extends along the width of the automobile. The cross member 20 has an overlapped part 22 and a closed cross section forming part 21. An opening 23, which is coincident with the opening 15, is provided in the overlapped part 22. A gusset 24 is provided under the overlapped part 22 and coupled to the front pillar 4.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in the front body structure of an automobile, particularly in the cowl portion.

In general, recent passenger cars have adopted a frameless integral structure as their body structure. This -(+Na) vehicle body is made by integrally forming the body and shirt frame by joining thin plates, and has features such as being lightweight, highly rigid, and able to lower the floor surface of the vehicle interior. .In such an integrated structure, it is important to propagate the external force applied to the load application points in various parts of the car body throughout the car body and equalize the stress in order to improve the rigidity of the heavy body and achieve weight reduction. Therefore, it is necessary to make the parts where the shape of the car body suddenly changes to 6FK and the parts around large openings have a strong structure.An example of such parts is the front body 1 and the passenger compartment shown in Figure 1. There is a cowl part that forms the boundary with the part 2.This cowl part 3 joins the left and right front pillars 4, 4, forms the lower peripheral part of the windshield 5, and bears the stress applied to the vehicle body. This is to improve the torsional rigidity of the vehicle body.In addition, the steering column is housed in the cowl part 3, which is an important item that affects safety in the event of a collision and steering resonance during high-speed driving. Furthermore, since the cowl part 3 is a part where the wind pressure increases due to the collision of the traveling wind and creates a positive wind pressure distribution, it is necessary to use this positive wind pressure to draw outside air into the passenger compartment for natural ventilation. A flow path 6 is formed in both the cowl panel 7 and the bonnet 7a.The outside air introduced through the flow path 6 flows through the opening in the rear vertical wall 9 of the front panel 8, as shown in FIG. It flows into the vehicle interior through a duct 10 that communicates with the interior of the vehicle.

By the way, a technique in which reinforcement measures are taken for the cowl portion 3 as described above is disclosed in Japanese Patent Laid-Open No. 11174/1983.

This is a cowl with a channel-shaped reinforcing paulownia 11 arranged in the vehicle width direction on the passenger compartment side of the rear vertical wall 9 of the GiJ-dun-your-no-panel panel 8! ? It has a reinforced configuration of li 3.

However, in precedent cases such as ``2,'' datato vertical wall 9
Also, it is difficult to align the center with the opening of the reinforcing material 11, which may cause a gap, making it difficult to apply Sheen 2 between the rear vertical wall 9 and the duct 10. A problem occurred.

The present invention was made in consideration of the following circumstances, and its purpose is to improve the strength of the cowl and to improve the strength of the cowl formed on the rear vertical wall of the lower upper panel. The object of the present invention is to provide an automobile body structure that facilitates the installation work of a duct connected to an opening.

To achieve this purpose, the EIIT is structured as follows. That is, an opening is provided in the rear vertical wall of the dunn air upper panel that forms the cowl part arranged in the vehicle width direction between the front pillars of the automobile, and a closed section forming part 1 overlaps with the single-chamber inversion of this rear vertical wall. and a cross member having a gusset part is joined to form a closed cross section between the closed section forming part and the rear vertical wall, and the opening of the overlapping part is aligned with the opening of the rear vertical wall, and the overlapping part and The cross member is brought into close contact with the rear vertical wall, and the vehicle width direction end 1N ((()) of the cross member is connected to the front pillar at the gusset portion.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. F, i3, and FIG. In FIGS. 3 and 4, the same reference numerals as in FIGS. 1 and 2 indicate the same or corresponding parts.

FIG. 3 is a perspective view of the end portion of the cowl portion in the vehicle width direction viewed from the passenger compartment side, and shows a state in which the cowl panel 7, which is the upper surface plate of the cowl portion, is removed.

The 7o top pillar 4 is formed by abutting and spot welding a front pillar inner 13 and a front pillar inner 14 which are pressed so as to form a closed cross section inside. The front edge of the front pillar inner 13 is joined to the vehicle width direction end g(() of the rear and vertical wall 9 of the Dason Your Spa Panel 8. left and right front pillars 4
, 4 are arranged in the vehicle width direction so as to connect them. The rear vertical wall 9 is provided with an opening 15, and this frontage 1
Outside air for natural ventilation is introduced into the passenger compartment from inside the vehicle.

A cowl side panel 16 is erected at the end of the vehicle width direction of the Danone upper panel 8 so as to extend in the length direction of the vehicle body, and the cowl side panel 16 is spot welded to the Danone upper panel 8. are joined with. and,
The KH wheel apron reinforcement 17 is stretched on the outer surface in the vehicle width direction of the cowl side panel 16.
The wheel apron reinforcement 17 is attached to the upper edge of the cowl side panel 16 and the outer edge of the cowl side panel 16.
0 Vehicle width direction edge s Joined by K spot welding. Further, on the inside of the cowl side panel 16, a seal panel 18 is erected in the vehicle width direction so as to face the rear vertical wall 9. Further, a reinforcing gusset plate is joined to the corner portion of the cowl side panel 16 and the rear vertical wall 9. A wheel apron (not shown) is connected to the cowl side panel 16 and extends forward.

A cross member 20 that is disposed diagonally in the vehicle width direction is abutted against the single compartment side of the rear vertical wall 9, and the upper edge of this cross member 20 is joined to the rear vertical wall 9 by spot welding. has been done. Then, the center of the cross member 20 in the vehicle width direction +N
(+ is provided with 2 closed cross-section forming parts that bulge toward the passenger compartment side, and the lower surface of this closed cross-section forming part 21 extends forward and is located on the lower surface of the bent edge of the dash upper panel 8. They overlap and are joined by spot welding.nrJ The closed section forming portion 21 is formed to form a closed section inside together with the rear vertical wall 9 and increase the section modulus, and is closer to the end in the vehicle width direction. As time passes, the bulge size decreases, and eventually it is formed in close contact with the rear vertical wall 9 in the vicinity of the opening 15 of the rear vertical wall 9. Also, the closed section forming portion 21 of the cross member 20
An overlapping part 22 is provided on the front pillar 4 side of the front pillar 4, and this overlapping part 22 has an opening in the rear vertical wall 9]5
An opening 23 having a shape that matches the shape of the opening 23 is formed. Such an overlapping portion 22 is in close contact with the rear vertical wall 9, and the above-mentioned opening 1
It is joined to the rear edge 11, % 9 by spot welding at multiple locations around 5.23. Further, a gusset portion 24 is formed at the lower edge of the overlapping portion 22, that is, at the end of the cross member 20 in the vehicle width direction, and extends so as to be connected to the front pillar 4 indicated by Mfi.

The end of the gusset portion 240 on the vehicle interior side is bent downward 41, and is formed to improve the surface rigidity of the gusset portion 24. In this manner, a wedge-shaped stepped portion 25 is formed in a portion adjacent to the overlapping portion 22 at the end portion in the vehicle width direction of the loss member 20 so as to protrude toward the single chamber side, and the end surface of this stepped portion 25 crosses the The end face of the member 20 in the vehicle width direction and the stone are in contact with each other.

An abbreviated bracket 26 is installed in the gap between the front gusset 24 and the front pillar inner 13. The peripheral edge of this bracket 26 overlaps with the rear edge of the B front pillar inner 13, the lower surface side of the end edge of the gusset portion 26, and the full 11 of the front pirunner 13 and is joined by spot welding. The corner formed by the bracket 26, the front pillar 4, and the stepped part 25 (/lj) A corner junk 7 connector 27 is stretched from above to cover the corner. are the rear edge of the front pillar/su 13, the side edge of the bracket 26, the end of the gusset part 24, the - side of the two-face side 2 steps + 1tη425, and the side surface of the front pillar inner 13 and spot. Joined by welding.

A duct 28 as shown in FIG. 4 is connected to the compartment side of the opening 15.23 formed as described in F1a. Opening in this duct 28]-5° Connects to 23 and duct 2
A roller 29 is applied between the flange of 8 and the overlapping part 22, and the rear vertical wall 9 is marked with tifH by the coupling screw.
It is sorbed to the double polymerization part 22.

The Sfj body structure of the automobile, which has been achieved as described above, has the following effects. Since a closed cross section is formed between the cross member 20 and the rear vertical wall 9 by the closed cross section forming portion 21 of the cross member 20 without twisting, the section modulus of this portion increases and the strength can be improved.

Next, an opening 23 is provided in the overlapping part 22, and the area around the opening 23 is spot welded to the rear vertical wall 9, and a gusset part 24 is further formed, so that the surface rigidity of the overlapping part 22 is improved. ” In addition, the cross member 20 is press-processed into a complicated shape to improve rigidity and become a strong member. Since it is connected to the front pillar 4 by forming a closed section inside at the corner junction 27, 1. The load applied from the front pillar 4 can be propagated to the entire cowl portion. moreover,
Since the overlapping part 22 is in close contact with the rear edge I:jf 9, the installation work of the duct 28 is easy, and the formation of a gap between the duct 28 and the rear vertical wall 9 or the overlapping part 222 can be prevented.

]7 Therefore, the cross member 20 not only reinforces the upper panel 8 but also allows the duct 28 communicating with the opening 15.23 to be easily accommodated.

Note that the opening 1'5.23 is not limited to being provided at the end portion in the vehicle width direction, but may also be provided at the center portion in the vehicle width direction.

As explained above, according to the present invention, a leg/near flange panel can be reinforced with a cross member having a closed cross-section forming portion, two overlapping portions, and a gutter portion, and the overlapping portion of the cross member can be connected to the rear vertical wall. Since an opening is also provided in the overlapping part so as to be in close contact with the opening in the rear vertical wall and to coincide with the opening in the rear vertical wall, the duct communicating with both openings can be easily and reliably accommodated, and the effect is excellent.

[Brief explanation of the drawing]

Fig. 1 and Fig. 2 are views showing a conventional example, Fig. 1 is a schematic side view of an automatic tun, Fig. 2 is a vertical cross-sectional mj view of section H in Fig. 1, and Fig. 3 and 4 are main views. FIG. 3 is a diagram showing one embodiment of the invention.
The figure is a partially cutaway perspective view of the cowl portion 3, and FIG. 4 is a longitudinal cross-sectional view of the sandwich portion of the cowl portion 3. 8... Danyuan Hahane/L/ 9 - Rear vertical wall 15.23... Opening 20 Cross member 21... Closed section forming part 22... Overlapping part 24... Gusset part 26 - Bracket 27... Corner Junk John 10.28...Duct! Chamberlain applicant: Toyo Kogyo Co., Ltd. Patent attorney: Takashi Suzue

Claims (1)

[Claims] (1) The Daso 7 Yuach panel forms a cowl section between the front pillars of the car that is partitioned from the passenger compartment in the vehicle width direction, and has an opening in a part of the rear vertical wall standing on the passenger compartment side, and this dash upper. The panel has a closed section forming part that is joined to the passenger compartment side of the rear vertical wall to form a closed cross section together with the rear vertical wall, and has an opening that coincides with the opening and an overlapping part that is in close contact with the rear vertical wall. A 111-part vehicle body structure for an automobile, comprising: a cross member having a gusset portion extending toward the rear of the vehicle from an edge of the fully overlapped portion.