JPH06107228A - Front body structure of automobile - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a front body structure of an automobile capable of distributing an initial input load to a bumper at the time of a head-on collision of a vehicle body over a wide range of a front portion of the body. [Structure] Shroud upper member 2 and cross member 4
A connecting member 12 for connecting the front end of the front frame 10 with the front frame 10.
The bumper is attached to the front end of the front frame 10 via the connecting member 12 at the joint between the front end of the front frame 10 and the connecting member 12.

Description

Detailed Description of the Invention

[0001]

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

[0002]

2. Description of the Related Art A conventional vehicle body structure for a vehicle is generally as follows, as disclosed in, for example, US Pat. No. 4,428,447. That is, a shroud upper member that extends in the vehicle width direction is provided at the upper end of the vehicle body front portion, and a cross member that also extends in the vehicle width direction is provided at the 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 portions. In addition, a connecting member that extends in the vertical direction on the front surface of the vehicle body and connects the shroud upper member and the cross member, or an octet shape from the bonnet mounting portion of the shroud upper member in the vehicle width direction central portion toward the cross member. It is also known that an extended bonnet lock stay is provided. Further, a bumper is provided at the forefront portion of the vehicle body so as to extend in the vehicle width direction, and this bumper is generally supported and fixed to the front end portion of the front frame.

[0003]

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

The problem to be solved by the present invention is to provide a front body structure of an automobile capable of distributing an initial input load to a bumper at the time of a head-on collision of a vehicle body in a wide range of a front portion of the vehicle body. is there.

[0005]

As a means for solving the above-mentioned problems, in the front body structure for a vehicle according to claim 1 of the present invention, in the front body structure for an automobile having the above-mentioned constitution, At the upper end of the shroud upper member, the lower end of the shroud upper member is connected to the cross member, the intermediate portion of the vertical direction is joined to the front end of the front frame, and the joint between the front end of the front frame and the connecting member is provided. In the above, the bumper is attached to the front end portion of the front frame via the connecting member.

According to a second aspect of the present invention, there is provided a front vehicle body structure for an automobile according to the first aspect of the present invention. A bonnet lock stay obliquely extending from the bonnet lock attaching portion of the above portion to each joint of the cross member and the connecting member was provided, and the lower end portion of this bonnet lock stay was fastened together with the cross member and the connecting member.

Further, in the front body structure for a vehicle according to a third aspect of the present invention, the front body structure for a front frame is combined with the structure of the front body structure for an automobile according to the first or second aspect of the present invention. A mounting bracket was provided on the inner side in the width direction, and the bumper was fixed to the mounting bracket via a connecting member.

[0008]

According to the vehicle body structure for a front part of the vehicle according to the first aspect of the present invention, the bumper, the front frame front end portion, the connecting member, the shroud upper member, and the cloth are constructed by the above-mentioned structure. Since the members can be connected to each other, it is possible to disperse the initial input load to the bumper at the time of a head-on collision of the vehicle body to a wide range of the front portion of the vehicle body through these members.

Further, according to the vehicle body structure for a front part of the vehicle according to the second aspect of the present invention, with the above-mentioned structure, the bonnet lock mounting portion and the joint portion of the cross member and the connecting member are effectively made. In addition to the effect of the front body structure of the automobile according to claim 1 of the present invention, the input load to the bonnet lock mounting portion when the bonnet is closed can be linked to the shroud upper member, the bonnet lock stay, Through the cross member, the connecting member, and the front frame, it is possible to disperse them in a wide range in the front part of the vehicle body. Further, with the above structure, the bonnet lock stay and the connecting portion and the shroud upper member form a triangular portion on the front surface of the vehicle body, so that the structure of the front surface portion of the vehicle body can be stabilized.

Further, according to the vehicle body structure for a front part of a vehicle according to a third aspect of the present invention, the bumper, the connecting member and the front end portion of the front frame can be easily attached to each other by the above-mentioned structure. Therefore, it is possible to improve the assembling workability of the vehicle body in addition to the effect of the front vehicle body structure of the automobile according to claim 1 or 2 of the present invention.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the front body structure of an automobile according to the present invention will be described below with reference to the accompanying drawings.

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 line II-II in FIG. 1, and FIG. 3 is a line III-III in FIG. FIG. 4 is a sectional view and FIG. 4 is an exploded perspective view of a left side portion of the vehicle body 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-section structure similarly extending in the vehicle width direction is provided at a lower end portion of the vehicle body front portion (see FIG. 3). ) Cross members 4 are provided respectively. Further, a pair of left and right shroud side panels 6 and a front shroud panel 8 joined to each other are arranged at the left and right ends of the front surface of the vehicle body. 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, the left and right front frames 10 are extended in the vehicle front-rear direction.

A pair of connecting members 12 extending in the up-down direction are provided near the end portion of the front surface of the vehicle body in the vehicle width direction. 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 inner side in the vehicle width direction, and a flange 16 is formed on the outer side in the vehicle width direction. The mounting bracket 18 is joined (see FIGS. 2 and 4). As shown in FIG. 2, the inner mounting bracket 14 abuts on the central portion in the vertical direction of the connecting member 12 from the rear, while the outer mounting bracket 18
Is in contact with the shroud front panel 8 from the rear via 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, which 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 this auxiliary plate 22
The a is joined to the shroud front panel 8, and the lower surface of the a is screwed to the upper surface of the end portion of the cross member 4 in the vehicle width direction.

As shown in FIG. 1, the shroud upper member 2 is provided with a bonnet lock mounting portion 24 at the vehicle widthwise central portion, 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 obliquely toward the joint between the connecting member 12 and the cross member 4 is provided. The upper end portions 26a of the pair of bonnet lock stays 26 extending in the shape of an eight character
Is welded to the bonnet lock attaching portion 24, and the lower end portion 26b is fastened together with the joint portion of the cross member 4 and the connecting member 12.

The features of the present invention in this embodiment are as follows.
The connecting member 12 connects the shroud upper member 2, the front frame 10, and the cross member 4 to each other, and the bumper 20 connects the front frame 10 via the connecting member 12 at the joint between the front end of the front frame 10 and the connecting member 12. It is attached to the front end of the. As a result, the input load to the bumper 20 in the initial stage of a vehicle front collision can be
Through the 10, the connecting member 12, the shroud upper member 2, and the cross member 4, it is possible to disperse them in a wide range in the front part of the vehicle body.

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 an eight shape, and the lower end portion 26b of the bonnet lock stay 26 is provided. Is fastened together with the cross member 4 and the connecting member 12 at the joint portion. As a result, it is possible to disperse and support the input load to the bonnet lock attaching portion 24 when the bonnet is closed, and since the triangular portion is formed on the front surface of the vehicle body, the structure of the front surface portion of the vehicle body can be improved. Stabilization can be achieved.

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

[Brief description of 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 line II-II in FIG.

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

FIG. 4 is an exploded perspective view of a left side portion 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 mounting part 26 Bonnet lock stay

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Osamu Kuroki 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Motor Corporation

Claims (3)

[Claims] 1. A front frame that extends in a vehicle front-rear direction at a vehicle width direction end portion of a vehicle body front portion, a shroud upper member that extends in a vehicle width direction at an upper end portion of a vehicle body front portion, and a vehicle width at a lower end portion of a vehicle body front surface portion. In a front vehicle body structure of an automobile including a cross member extending in a direction and a bumper extending in a vehicle width direction at a vehicle body front portion, a shroud upper member having a vertically extending upper end portion in the vehicle body front portion is provided. Is provided with a connecting member having a lower end joined to the cross member and an intermediate portion in the up-down 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. A front body structure of an automobile, wherein the front body structure is attached to a front end portion of the front frame. 2. A bonnet lock stay diagonally extending from a bonnet lock mounting portion at a central portion in the vehicle width direction of the shroud upper member to a joint portion between the cross member and the connecting member, and a lower end portion of the bonnet lock stay. 2. The front vehicle body structure of the automobile according to claim 1, wherein is fastened together with the cross member and the connecting member. 3. The mounting bracket is joined to the inside of the front end of the front frame in the vehicle width direction, and the bumper is fixed to the mounting bracket via the connecting member. Front car body structure of the car.