JP2848666B2 - Vehicle front body structure and vehicle body assembly method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a vehicle body front structure and a vehicle body assembling method, and more particularly, to a vehicle having a vehicle body front unitized.

2. Description of the Related Art Conventionally, as disclosed in Japanese Patent Application Laid-Open No. 63-312279, in an automobile assembly line (main line), a vehicle body such as a bumper, a radiator, a radiator grill, a headlamp, etc. Since the mounting parts of the parts were individually assembled to the body of the vehicle at individual stations, the number of stations increased, so the length of the assembly line became longer and complicated at present .
Further, in a mixed flow line for assembling a plurality of types of automobiles, an operator must determine whether or not to install the above-mentioned components in accordance with the type of the vehicle, which is particularly problematic in terms of workability.

Therefore, it is conceivable to unitize some of the mounting components to facilitate the work on the assembly line and reduce the number of stations. If you do this,
Since the entire unit is separately assembled, it is advantageous in terms of the mounting accuracy of each mounting component in the unit.

Therefore, from such a viewpoint, bumpers, radiators,
It has been proposed that various components such as a radiator grill and a headlamp are assembled to a radiator core support to form a unit, and the unit is assembled to a front portion of a vehicle body.

(Problems to be Solved by the Invention) By the way, in the conventional vehicle body structure in which the unitized structure as described above is not employed in the front portion of the vehicle body, the front end portion of the front side frame is located at a position corresponding to the front side frame in the shroud panel. Is formed. Then, the front end of the front side frame is inserted into this opening, and the bumper reinforcement is joined to the front end of the inserted front side frame to improve the rigidity of the front part of the body and the front collision performance of the vehicle. I was trying to figure it out. However, in the configuration where the front part of the body is unitized as described above, the nose part has already been completed, so the front side frame is inserted through the shroud panel as before, and Joining the bumper reinforcement is difficult to work. Therefore, the front side frame is divided in advance into a portion located on the front side of the shroud panel and a portion located on the rear side, and the front side portion is attached over the front surface of the shroud panel and the rear surface of the bumper reinforcement, and the nose unit is mounted. After constructing the structure, a structure in which the front end of the rear portion is joined to the back surface of the shroud panel is also conceivable, but in this case, since the front side frame is divided into two, its rigidity is reduced, and This is not a preferable configuration because the front-end collision resistance is reduced.

SUMMARY OF THE INVENTION The present invention has been made in view of these points, and has a front body structure of an automobile and an assembly thereof capable of ensuring both rigidity and front-end collision resistance of the front body and unitization of the front body. The aim is to provide a method.

(Means for Solving the Problems) In order to achieve the above object, the present invention is configured such that a front end of a front side frame and a bumper reinforcement are integrally assembled via a shroud panel. The specific means are as follows.

The invention according to claim (1) is characterized in that a front part of the shroud panel is attached to a vehicle body in which a nose unit having a shroud panel is attached to a front portion of a vehicle body having a front side frame extending in the vehicle longitudinal direction. A portion corresponding to the side frame is extended toward the front of the vehicle body, and a bumper reinforcement is connected to a front surface of the extended portion, and a front end of the front side frame is connected to a rear surface.

The invention according to claim (2) is a method of assembling a vehicle body by attaching a nose unit having a shroud panel to a front portion of a vehicle body having a front side frame extending in a vehicle front-rear direction. A part corresponding to the front side frame is extended toward the front side of the vehicle body, a step of forming a nose unit by connecting a bumper reinforcement to a front surface of the extended part, and, after this step, a rear surface of the extended part Connecting the front end of the front side frame to the front side frame.

(Operation) The operation of the present invention by the above means is as follows.

In the invention according to claim (1), since the bumper reinforcement and the front side frame are integrally connected via the projecting portion of the shroud panel,
In a vehicle body in which the front portion of the vehicle body is unitized, the rigidity of the nose unit is improved, and front-end collision resistance can be sufficiently ensured.

In the invention according to claim (2), since the bumper reinforcement and the front side frame are connected to the projecting portion of the shroud panel, the degree of freedom of the connecting position is improved.

Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In FIG. 1 showing the front of a car, 1 is a car,
A nose unit 3 is attached to a front portion of the vehicle body 2. Front fenders 4, 4 are provided outside both sides of the vehicle body 2, and a hood 5 is provided above the front part.

As shown in detail in FIG. 2, the vehicle body 2 includes a wheel apron which forms left and right side walls of an engine room 11.
Front side frames 13,13 are joined to the lower side of 12,12, and wheel apron reinforcements 14,14 are joined to the upper side of the wheel aprons 12,12 to extend vertically in the longitudinal direction of the vehicle. Is configured.

Further, flange portions 12a, 13a are formed at the front ends of the wheel aprons 12, 12 and the front side frames 13, 13, and L-shaped front end panels 18, 18 are attached over the flange portions 12a, 13a. Have been. Further, a bolt hole 13b is formed in the center of the flange portion 13a of the front side frame 13, and a similar bolt hole 18a is formed in the front end panels 18, 18 at a position corresponding to the bolt hole 13b. Has been drilled. Further, a first cross member 15 having a rectangular cross section is provided between the left and right front side frames 13, 13 at a position slightly behind the front end panels 18, 18.

The nose unit 3 will be described in detail with reference to FIGS. 3 and 4. The nose unit 3 extends in the vehicle width direction between the upper end portions of the left and right shroud panels 21 and 21 that incline forward toward the vehicle body toward the center in the vehicle width direction. A shroud upper 22 is provided. The shroud upper 22 is formed integrally with the shroud panel 21, and has a vertical wall portion 22A extending in the vertical direction.
It has an upper wall portion 22B extending rearward from an upper edge of the vertical wall portion 22A, and a rear wall portion 22C extending below the rear edge of the upper wall portion 22B. As shown in FIG. 6, vertical walls 23, 23 extending in the vehicle width direction by a predetermined dimension are formed inside the shroud panels 21, 21, and the vertical walls 23, 23 A projecting portion 23a formed of a vertical surface that projects toward the front of the vehicle body with a predetermined dimension is formed in a central portion in the vertical direction.

Between the lower ends of the left and right vertical walls 23, 23, a support member 26 that is bent and formed continuously with the shroud panel 21 is provided, and the support member 26 includes a capacitor 24A that is a superimposed member 24. And a lower portion of the radiator 24B. The condenser 24A and the radiator 24B are integrally connected by a member (not shown), and their lower ends are supported by a support member 26 via rubber mount members 27, 27. Upper wall 22B of shroud upper 22 via 28, 28
(Mounting hole 22a).

Further, the front side frame is provided at each of the upper end and the lower end of the overhanging portions 23a, 23a of the vertical walls 23, 23.
13 and bolt holes 13 drilled in the front end panel 18
Mounting holes 23b, 23b corresponding to b, 18a are formed.

On the other hand, bumper 31 has bumper reinforcement inside.
On the rear surface of the bumper reinforcement 32, bolts 33, 33 are erected at positions corresponding to the mounting holes 23b, 23b in the overhang portion 23a. That is, bumper 3
1 is an extension 23a and a front end panel by bolts 33, 33 erected on a bumper reinforcement 32.
18 through the flange 13 of the front side frame 13
It is designed to be fastened and fixed to a.

Further, both ends of the bumper 31 are connected to the front fender 4 of the vehicle body 2 through bolts 35, 35 erected on the bumper 31 and bolts (not shown) applied through the mounting holes 31a of the bumper 31. Is also connected and fixed to the mounting portion 4a.

Further, both ends 2 of the upper wall portion 22B of the shroud upper 22 are formed.
2b and 22b are fastened and fixed to the mounting portion 4b on the upper part of the front fender 4 and the wheel apron reinforcement 14 by bolts (not shown).

51 is an intercooler, the upper part of which is a mounting bracket 5
Bolt 5 to vertical wall 22A of shroud upper 22 through 2,52
3,53. Although not shown, the lower end of the intercooler 51 is supported by a bracket projecting from the bumper reinforcement 32.

Numeral 54 is a radiator grill located in the center of the front part of the automobile, left and right mounting portions 54a, 54a are provided in mounting holes in the vertical wall portion 22A of the shroud door 22, and a central mounting portion 54b is provided in the vertical direction of the bonnet lock means 55. Each of the members 56 is fitted and fixed in a mounting hole. The bonnet lock means 55 is fastened and fixed to the vertical wall 22A of the shroud upper 22 by bolts 59,59.

61A, 21B are left and right headlamps, and the mounting portions 61a, 61a at the upper end of each lamp are attached to the vertical wall portion 22A of the shroud door 22 by bolts 62, 62, and the mounting portions 61b at the lower end are attached to the shroud panel 21 by bolts 63. Each is fastened and fixed.
64 and 65 are harnesses for connecting electrical systems, and harness 6
4 is a support member 2 through mounting fixtures 66, 66 and bolts 67, 67
6, the harness 65 is fitted and fixed to the mounting hole of the upper wall portion 22B of the shroud door 22 via the mounting tools 68, 68. 7
Reference numerals 1 and 71 denote cushioning members when the hood 5 is closed, and are fitted and fixed to the upper wall portion 22B of the shroud upper 22.

Next, an assembling operation when assembling the front vehicle body will be described. First, the nose unit 3 is assembled in a process different from that of the vehicle body 2. That is, as shown in FIGS. 3 and 4, the shroud panel 21, the shroud upper 22, the vertical wall
First, the condenser 24A and the radiator 24B are supported and assembled to the support member 26 with respect to the unit base composed of the support members 26 and 23, and their upper ends are attached to the shroud upper 22 via the mounting brackets 28 and 28.
And then the other parts, namely bumper 31,
Intercooler 51, radiator grill 54, headlamp 61
The nose unit 3 is constructed by assembling A, 61B and the like. Then, when attaching the bumper 31 to the shroud panel 21,
Bolts standing on bumper reinforcement 32
33, 33 are inserted into the mounting holes 23b of the overhang 23a.

Thereafter, the nose unit 3 thus constructed is moved to the sixth position.
As shown in the drawing, the vehicle body 2 is moved from the front side in the horizontal direction and positioned at a predetermined position to be assembled. When this assembling work is performed, the bolts inserted through the mounting holes 23b of the overhang portion 23a are used. With the positions of 33, 33 set at positions corresponding to the flange portion 13a of the front side frame 13 and the bolt holes 13b, 18a of the front end panel 18, the bolts 33, 33 are inserted through the bolt holes 13b, 18a. By fastening a nut from the rear side of the flange portion 13a of the front side frame 13, the bumper reinforcement 32 is fastened to the front end of the front side frame 13 as shown in FIG. Thereafter, as described above, both ends of the bumper 31 are connected and fixed to the mounting portion 4a of the front fender 4 of the vehicle body 2 by bolts 35, 35 and bolts applied through the mounting holes 31a of the bumper 31. , Support member
The nose unit 3 is assembled to the vehicle body by fastening the rear end surface of the 26 to the first cross member 15.

Therefore, according to the present embodiment, the front end of the front side frame 13 is fastened to the back of the shroud panel 21 as described above, so that the front side frame 13 can be bumped to the front side frame 13 while being unitized. The force 32 can be integrally fastened, so that the assemblability of the vehicle body can be improved and the anti-front collision performance can be improved. Also,
Since the front side frame is not divided into two parts, the rigidity of the front part of the vehicle body can be reliably ensured. Furthermore, since the mounting position of the bumper reinforcement 32 and the front side frame 13 on the shroud panel 21 can be easily changed by changing the mounting position of the mounting hole 23b, the mounting position has a large degree of freedom. It is.

(Effects of the Invention) As described above, according to the present invention, the following effects are exhibited.

In the invention according to claim (1), since the bumper reinforcement and the front side frame are integrally connected via the shroud panel, the rigidity of the nose unit and the front-end collision resistance are ensured. Meanwhile, the front part of the vehicle body can be unitized.

In the invention according to claim (2), by connecting the bumper reinforcement and the front side frame to the shroud panel, the degree of freedom of the connecting position can be improved.

[Brief description of the drawings]

1 to 6 show an embodiment of the present invention. FIG. 1 is a perspective view of a front portion of an automobile, FIG. 2 is a perspective view of a front portion of a vehicle body, and FIG. 3 is a nose unit. FIG. 4 is an exploded perspective view of the nose unit, and FIG.
FIG. 6 is a cross-sectional view at a position corresponding to the line, and FIG. 6 is a perspective view showing a work of assembling the nose unit to the vehicle body main body with a part of the nose unit omitted. 1… car 2… body 3… nose unit 13… front side frame 21… shroud panel 32… bumper reinforcement

Claims (2)

(57) [Claims] 1. A vehicle body comprising a nose unit having a shroud panel attached to a front portion of a vehicle body having a front side frame extending in a vehicle front-rear direction, a portion corresponding to the front side frame in the shroud panel. Is protruding toward the front of the vehicle body, and a bumper reinforcement is
A front body structure of an automobile, wherein a front end of a front side frame is connected to a rear surface. 2. A method of assembling a vehicle body by attaching a nose unit having a shroud panel to a front portion of a vehicle body having a front side frame extending in the front-rear direction of the vehicle body, wherein the nose unit corresponds to a front side frame in the shroud panel. The part that has been extended to the front side of the vehicle body, a bumper reinforcement is connected to the front of the overhanging part to form a nose unit, and after this step,
Coupling the front end of the front side frame to the rear surface of the overhang portion.