JP3080790B2 - Car front body structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body front structure.

[0002]

2. Description of the Related Art A conventional vehicle front body structure is generally as follows, for example, as disclosed in US Pat. No. 4,284,847. That is, a shroud upper member extending in the vehicle width direction is provided at an upper end portion of the vehicle body front portion, and a cross member extending similarly in the vehicle width direction is provided at a lower end portion of the vehicle body front portion. Left and right front frames extending in the front-rear direction of the vehicle body are disposed in the respective sections. Further, a connecting member extending vertically in the front part of the vehicle body and connecting the shroud upper member and the cross member, and a bonnet mounting portion at the center of the shroud upper member in the vehicle width direction from the bonnet mounting portion to the cross member toward the cross member. There is also known one provided with an extended bonnet lock stay. Further, a bumper extends in the vehicle width direction at the frontmost portion of the vehicle body, and the bumper is generally supported and fixed to the front end of the front frame.

[0003]

In the front body structure of an automobile, how to arrange each of the above-mentioned members is an important issue in order to ensure the safety of the occupant in a frontal collision of the vehicle. The collision load at the time of a head-on collision is input to the front of the vehicle body via a bumper, but there is a demand to disperse the input load to this bumper over a wide range of the front part of the vehicle at the initial stage of a head-on collision. There is. Conventionally, in many cases, the initial input load to the bumper at the time of a frontal collision is mainly transmitted to the front frame in a concentrated manner.

SUMMARY OF THE INVENTION An object of the present invention is to provide a front body structure of an automobile capable of dispersing an initial load applied to a bumper in a frontal collision of a vehicle over a wide range of the front part of the body. is there.

[0005]

According to a first aspect of the present invention, there is provided a vehicle front body structure having the above-described structure, wherein the vehicle front body includes a vehicle body front portion. A connecting member extending vertically and having an upper end joined to the shroud upper member and a lower end joined to the cross member, and a middle part in the up / down direction joined to the front end of the front frame, and a joint between the front end of each front frame and the joining member. In the above, the bumper is attached to the front end of the front frame via a connecting member.

A bonnet stay extending obliquely from a bonnet lock mounting portion at the center of the shroud upper member in the vehicle width direction is provided at each joint between the cross member and the connecting member, and a lower end of the bonnet lock stay is provided. Cross fastened to the cross member and the connecting member.

Further, in the vehicle body front structure according to the second aspect of the present invention, in addition to the configuration of the vehicle front body structure according to the first aspect of the present invention, a front width direction of a front end portion of the front frame is provided. A mounting bracket was provided inside, and the bumper was fixed to the mounting bracket via a connecting member.

[0008]

According to the front body structure of a vehicle according to the first aspect of the present invention, by adopting the above-described structure, the bumper, the front end portion of the front frame, the connecting member, the shroud upper member, and the cross are provided. Since the members can be connected to each other, it is possible to distribute the initial input load to the bumper in a frontal collision of the vehicle body over a wide range of the front portion of the vehicle body via these members.

Further, since the bonnet lock attachment portion and the joint portion of the cross member and the connecting member can be effectively linked, the input load to the hood lock attachment portion when the hood is closed can be reduced. It is possible to disperse it over a wide range of the front part of the vehicle body via the stay, the cross member, the connecting member, and the front frame. In addition, with the above configuration,
Since the bonnet lock stay and the connecting portion and the shroud upper member form a triangular portion on the vehicle body front portion, the structure of the vehicle body front portion can be stabilized.

Further, according to the front body structure of an automobile according to the second aspect of the present invention, by adopting the above-mentioned structure, the bumper, the connecting member and the front end of the front frame can be easily attached to each other. Therefore, in addition to the effect of the first aspect of the present invention, the workability of assembling the vehicle body can be improved.

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of a vehicle body structure according to the present invention;

FIG. 1 is a front view showing a schematic structure of a front body structure of an automobile according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II in FIG. 1, and FIG. 4 is an exploded perspective view of a left side portion of the vehicle body structure of the vehicle body structure shown in FIG.

As shown in FIG. 1, a shroud upper member 2 extending in the vehicle width direction is provided at an upper end portion of the vehicle body front portion, and a closed cross-sectional structure also extending in the vehicle width direction is provided at a lower end portion of the vehicle body front portion (see FIG. 3). ) Are arranged. Further, a shroud side panel 6 and a shroud front panel 8 which are joined to each other are provided at a pair of left and right sides at both left and right ends of the vehicle body front part. The upper end of the shroud side panel 6 is joined to the shroud upper member 2, while the lower end of the shroud front panel 8 is joined to the cross member 4. Further, left and right front frames 10 extend in the vehicle front-rear direction.

A pair of connecting members 12 extending in the up-down direction are disposed near the end in the vehicle width direction on the front part of the vehicle body. The upper end of the connecting member 12 is attached to the shroud upper member 2,
The lower ends are joined to the cross members 4 respectively. An L-shaped mounting bracket 14 is joined to the front end of the front frame 10 on the inside in the vehicle width direction, and a flange 16 is formed on the outside in the vehicle width direction. (See FIGS. 2 and 4). As shown in FIG. 2, the inner mounting bracket 14 abuts the center of the connecting member 12 in the vertical direction from the rear, while the outer mounting bracket 18
Is in contact with the shroud front panel 8 from the rear through the flange portion 16. Then, the bumper 20 is screwed to the mounting brackets 14 and 18 at these contact portions. As shown in FIG. 4, an auxiliary plate 22 having an L-shaped cross section that forms a closed cross section with the front frame 10 is joined to the lower surface of the front end of the front frame 10. The flange 22 at the front end of the auxiliary plate 22
a is joined to the shroud front panel 8, and the lower surface thereof is screwed to the upper surface of the cross member 4 at the end in the vehicle width direction.

As shown in FIG. 1, a hood lock mounting portion 24 is provided at the center of the shroud upper member 2 in the vehicle width direction, and the hood lock mounting portion 24 is provided on the front surface of the vehicle body. A pair of left and right bonnet lock stays 26 extending diagonally toward the joint between the connecting member 12 and the cross member 4 are provided. The upper end portions 26a of the pair of bonnet lock stays 26 extending in an eight-letter shape.
Is welded to the bonnet lock mounting portion 24, and the lower end portion 26b is fastened to a joint portion between the cross member 4 and the connecting member 12 together.

The features of the present invention in this embodiment are as follows.
A connecting member 12 connects the shroud upper member 2, the front frame 10, and the cross member 4 to each other. At a joint between the front end of the front frame 10 and the connecting member 12, the bumper 20 is connected to the front frame 10 via the connecting member 12. At the front end of the As a result, the initial load applied to the bumper 20 when the vehicle
It becomes possible to disperse over a wide area at the front of the vehicle body via the 10, the connecting member 12, the shroud upper member 2 and the cross member 4.

Another feature is that a pair of bonnet lock stays 26 extending from the bonnet lock mounting portion 24 to the joint between the cross member 4 and the connecting member 12 are provided in a figure-eight shape, and a lower end portion 26b of the bonnet lock stay 26 is provided. Is fastened to the cross member 4 and the connecting member 12 at the joint. This makes it possible to support the load applied to the hood lock mounting portion 24 when the hood is closed in a wide range, and to form a triangular portion on the front surface of the vehicle body. Stabilization can be achieved.

Although the vehicle front body structure according to the present invention has been described in detail with reference to embodiments, the vehicle front body structure according to the present invention is not limited to the embodiments. Various changes can be made.

[Brief description of the drawings]

FIG. 1 is a plan view showing a schematic configuration of a front body structure of an automobile according to an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a sectional view taken along line III-III in FIG.

4 is an exploded perspective view of a left side portion of the vehicle body structure of the vehicle body structure shown in FIG.

[Explanation of symbols]

 2 Shroud upper member 4 Cross member 10 Front frame 12 Connecting member 24 Bonnet lock attachment part 26 Bonnet lock stay

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-4-27675 (JP, A) JP-A-4-292269 (JP, A) JP 4-59583 (JP, U) JP 2-U 59075 (JP, U) Hikaru Hira 3-13281 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) B62D 25/08

Claims (2)

(57) [Claims] 1. A front frame extending in a vehicle width direction at a front end of a vehicle body, a shroud upper member extending at an upper end of a vehicle front surface in a vehicle width direction, and a vehicle width extending at a lower end of a vehicle front surface. A front body structure of an automobile, comprising a cross member extending in the vehicle direction, and a bumper extending in the vehicle width direction at the vehicle body front part, wherein the shroud upper member extends vertically at the vehicle body front part and has an upper end part. A connecting member having a lower end joined to the cross member and an intermediate portion in the vertical direction joined to the front end of the front frame, and the bumper is interposed at the joint between the connecting member and the front end of the front frame via the joining member. To the front end of the front frame .
The shroud upper member has a central portion in the vehicle width direction.
Connection with the cross member from the
Bonnet lock stay that extends diagonally at the joint with the member
The lower end of this bonnet lock stay is
A front body structure of a motor vehicle, wherein the vehicle body is fastened to the cross member and the connecting member . 2. A vehicle width direction of the front end of the front frame.
The mounting bracket is joined inside and the bumper is connected
Being fixed to the mounting bracket via a member
The front body structure of an automobile according to claim 1, wherein: