JP2002187575A - Automotive body front structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automotive body front structure that imposes no fastening load on a radiator core support panel when the front end of a front side member and the rear end of a bumper stay are fixedly fastened coaxially with the radiator core support panel in between. SOLUTION: The radiator core support panel 1 has a plurality of openings 17 of relatively small dimensions. A plurality of embossed portions 16 on the front end of the front side member 7 are butted against and fixedly fastened to the rear end of the bumper stay 11 through the openings 17, which can prevent a fastening load from acting on the radiator core support panel 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle body front structure of an automobile.

[0002]

2. Description of the Related Art As a conventional front body structure of a vehicle, a radiator core support panel constituting the foremost part (front end of the vehicle body) of a vehicle body is formed by molding a resin material.

[0003] When the radiator core support panel is entirely formed of a resin material, torsional deformation and assembly dimensional errors, etc., which are found in a metal radiator core support panel formed by joining a plurality of metal panel materials, are eliminated. This has the advantage that it can be avoided and the degree of freedom of modeling can be obtained.

[0004]

A front bumper is provided on the front side of the radiator core support panel.
Bumper stays attached to both sides of the front bumper in the vehicle width direction of the bumper reinforcement are attached to the front end of a front side member extending in the vehicle front-rear direction on both sides in the vehicle width direction at the front of the vehicle body. It is desired that the bumper stay be coupled on the substantially same axis as the member so that a collision load acting on the bumper reinforcement at the time of a frontal collision of the vehicle is transmitted from the bumper stay to the front side member as an axial input.

However, since a radiator core support is interposed between the rear end of the bumper stay and the front end of the front side member, the rear end of the bumper stay and the front side of the front side member are sandwiched by the radiator core support. When the front end of the member is fastened and fixed, the radiator core support panel is pressed. Therefore, if the radiator core support panel is made of resin, the radiator core support panel may be crushed, deformed or damaged by this fastening load, for example, the tightening load by bolts and nuts. There is.

Therefore, a reinforcing insert made of a metal panel material is provided at a portion sandwiched between the rear end of the bumper stay and the front end of the front side member. However, the cost is disadvantageous.

Further, as shown in, for example, JP-A-63-313279, a front end of a front side member is arranged to penetrate in front of a radiator core seat port panel, and a bumper stay is connected to the front end. However, in this case, a large opening corresponding to the cross-sectional profile of the front side member must be provided in the radiator core support panel, which causes a reduction in the strength and rigidity of the radiator core support panel.

In view of the above, the present invention provides a fastening load between the bumper stays and the front side members disposed on the front and rear surfaces of the radiator core support panel, even if the radiator core support panel is made of resin. ) Provides a vehicle body front structure which does not act on the radiator core support and is not collapsed or damaged.

[0009]

According to the first aspect of the present invention, the front end of a front side member extending in the vehicle longitudinal direction on both sides in the vehicle width direction of the vehicle front is provided with a bumper reinforcement in the vehicle width direction. The bumper stays attached to both sides are arranged on substantially the same axis as the front side member with the radiator core support panel at the front end of the vehicle body interposed therebetween, and the radiator core support panel is disposed at the rear end of the bumper stay or at the front end of the front side member. While fastening and fixing to either one, either the front end of the front side member or the rear end of the bumper stay partially penetrates the radiator core support panel, and the front end of these front side members and the rear end of the bumper stay Butt directly on the radiator core support panel, and It is characterized in that the fastening load of the Sutei was not to act.

According to the second aspect of the present invention, the radiator core support panel according to the first aspect is provided with a plurality of openings having a relatively small diameter, and the front end of the front side member or the rear end of the bumper stay. On the other hand, a plurality of embossed portions are provided corresponding to the openings and inserted into the openings, and the rear end of the bumper stay and the front end of the front side member are directly abutted through the embossed portions. And

[0011]

According to the first aspect of the present invention, one of the front end of the front side member and the rear end of the bumper stay partially penetrates the radiator core support panel, and the front end of the front side member is formed. And the rear end of the bumper stay are directly butted and fixed so that the fastening load between the front side member and the bumper stay is not applied to the radiator core support panel, so that the radiator core support panel is made of resin. Also, it is possible to prevent the radiator core support panel from being crushed, deformed or damaged by the fastening load.

As a result, when the radiator core support panel is made of resin, a reinforcing insert made of a metal panel material is provided on the radiator core support panel in a required area for fastening the bumper stay and the front side member. There is no need to provide it, and it can be obtained cost-effectively.

Further, since the radiator core support panel is fastened and fixed to either the rear end of the bumper stay or the front end of the front side member, the mounting support rigidity of the radiator core support panel to the front side member is sufficiently high. Can be secured.

According to the invention described in claim 2, according to claim 1,
In addition to the effects of the invention, the radiator core support panel is provided with a plurality of openings having a relatively small diameter, and a plurality of embossed portions provided at the front end of the front side member or at the rear end of the bumper stay are inserted through the openings. Since the front end of the front side member and the rear end of the bumper stay abut each other via the embossed portion, the total opening area of the opening can be reduced as much as possible, and the panel surface rigidity of the radiator core support panel decreases. Can be suppressed small.

Further, when the embossed portion is provided at the front end of the front side member, positioning can be performed at the time of assembling the radiator core support panel by engagement of the embossed portion with the opening, and the radiator core support panel is provided. Can be improved.

[0016]

Embodiments of the present invention will be described below in detail with reference to the drawings.

In FIGS. 1 to 4, reference numeral 1 denotes a radiator core support panel which constitutes the foremost portion (front end of the vehicle body) of the vehicle. The radiator core support upper 2 and the radiator core support lower 3 are provided at the top and bottom of the vehicle. The radiator core support upper 2 and the radiator core support lower 3 are provided on both sides in the width direction with side portions 4 which are continuously provided.

The side portion 4 includes a pillar portion 5 for vertically connecting the radiator core support upper 2 and the radiator core support lower 3 and a vehicle width direction end of the pillar portion 5 and the radiator core support upper 2. And a lamp mounting portion 6 provided continuously.

In the present embodiment, the radiator core support panel 1 is integrally formed of an appropriate resin material, and the radiator core support upper 2, the radiator core support lower 3, and the pillar portion 5 are all formed in the rear of the vehicle body. It is formed in an open cross section that opens toward.

Both ends in the vehicle width direction of the radiator core support upper 2 are connected to an upper reinforcement of a hood ridge panel (not shown) constituting a side wall of the engine room E.

Front side members having a closed cross-sectional structure, which are joined to the hood ridge panel and extend in the vehicle front-rear direction, constitute a front-rear frame member at the vehicle width direction on both sides in the vehicle width direction of the engine room E. 7 is provided.

A front end of the front side member 7 is disposed on a rear surface of the pillar portion 5 of the radiator core support panel 1, and a flange 7a is formed by bending the peripheral edge thereof, and an end cover 8 is inserted through the flange 7a. After joining, the front end opening of the front side member 7 is closed by the end cover 8.

Reference numeral 9 denotes a bumper reinforce of a front bumper (not shown). The bumper reinforce 9 is formed, for example, in a rectangular closed cross section, and the radiator core support panel 1 is provided on the rear end surfaces on both sides in the vehicle width direction. A bumper stay 11 is mounted on the front surface of the pillar portion 5 and substantially coaxially with the front side member 7.

The bumper stay 11 is formed, for example, as a tapered rectangular cylindrical body. Flanges 11a and 11b are bent around the front and rear ends thereof, and an end cover 12 is joined to the front end flange 11a. The front end opening of the bumper stay 11 is closed.

The bumper stay mounting portion on the rear wall of the bumper reinforcement 9 and the end cover 12 of the bumper stay 11
Has four bolt insertion holes 1 at the corresponding positions.
A weld nut 15 is provided concentrically with the bolt insertion hole 13 on the inner surface of the rear wall of the bumper reinforce 9.

The bumper stay 11 has an end cover 12 at its front end.
Is superimposed on the rear surface of the bumper reinforce 9, and a bolt 20 is inserted into the bolt insertion holes 14, 13 so that the bolt 1
6 is screwed into a weld nut 15 and attached to a bumper reinforce 9 in advance.

Then, with the bumper stay 11 disposed on the same axis as the front side member 7 with the pillar portion 5 of the radiator core support panel 1 interposed therebetween, the pillar portion 5 of the radiator core support panel 1 is connected to the bumper stay 11. And the front end of the front side member 7 is fastened and fixed, and either the front end of the front side member 7 or the rear end of the bumper stay 11 is partially passed through the pillar portion 5, The front end of the front side member 7 and the rear end of the bumper stay 11 are directly butted and fixed.

In this embodiment, a pair of relatively small-diameter embossed portions 16 each having a front rectangular taper shape are directed forward on the front end cover 8 on the front end of the front side member 7 and on the upper and lower sides thereof. On the other hand, the pillar portion 5 of the radiator core support panel 1 is provided with four relatively small-diameter front opening portions 17 at positions corresponding to the embossed portions 16 so that the embossed portions 16 can be inserted. The embossed portion 16 is inserted into the opening 17 and the embossed portion 16 is overlapped with the flange 11b at the rear end of the bumper stay 11, and the rear end of the bumper stay 11 is connected to the rear end of the bumper stay 11 through the embossed portion 16. The front end of the front side member 7 is directly butted to be fastened and fixed.

Bolt insertion holes 18 and 19 are formed at substantially the center of the embossed portion 16 and the upper and lower sides of the flange 11b at the rear end of the bumper stay, respectively. A weld nut 21 is provided concentrically with the embossed portion 16.
The bolt 22 is inserted into the bolt insertion holes 19 and 18 in a state where the bolts 22 and
Is screwed into the weld nut 21 and fastened.

On the other hand, the pillar portion 5 is formed on the flange 11b at the rear end of the bumper stay by a bolt 25 inserted into a bolt insertion hole 23, 24 provided in the bumper stay and a nut 26 screwed to the bolt 25. It is fastened and fixed to the side.

Further, a metal collar 27 is attached to the bolt insertion hole 23 of the pillar portion 5 to reinforce the periphery of the bolt insertion hole 23.

According to the structure of the above embodiment, the embossed portion 16 provided at the front end of the front side member 7 is inserted into the opening 17 provided in the pillar portion 5 of the radiator core support panel 1, and The front end of the member 7 and the rear end of the bumper stay 11 are directly butted and fixed via the embossed portion 16 so as not to apply the fastening load between the front side member 7 and the bumper stay 11 to the pillar portion 5. Therefore, even if the radiator core support panel 1 is made of resin, the pillar portion 5 can be prevented from being crushed, deformed or damaged by the fastening load between the front end of the front side member and the rear end of the bumper stay.

As a result, the bumper stay 1 is
It is not necessary to provide a reinforcing insert made of a metal panel material in a required area where the rear end of the front side member 7 and the front end of the front side member 7 are fastened, which is advantageous in cost.

Further, the pillar portion 5 of the radiator core support panel 1 is fastened and fixed to the rear end flange 11b of the bumper stay 11 directly connected to the front side member 7, so that the front side member 7 of the pillar portion 5 is fixed. Can sufficiently secure the mounting support rigidity.

Further, as described above, the pillar portion 5 is provided with a plurality of openings 17 having a relatively small diameter, and the embossed portion 16 provided at the front end of the front side member 7 is inserted through the opening 17 so that Since the front end of the front side member 7 and the rear end of the bumper stay 11 abut each other via the embossed portion 16, the total opening area of the opening 17 can be reduced as much as possible, and the panel surface rigidity of the pillar 5 can be reduced. The decrease can be suppressed to a small extent.

Further, since the embossed portion 16 is provided at the front end of the front side member 7, positioning can be performed at the time of assembling the radiator core support panel 1 by engagement of the embossed portion 16 with the opening 17, and the radiator The workability of assembling the core support panel 1 can be improved.

Further, in the above embodiment, the shape of the embossed portion 16 and the opening 17 is a front rectangular shape.

In the above embodiment, the embossed portion 16 is provided at the front end of the front side member 7, but may be provided at the rear end of the bumper stay 11 (in this case, the front side member 7 is The front end end cover 8 is not required). In some cases, the embossed portions 16 are provided at both the front end of the front side member 7 and the rear end of the bumper stay 11, and the two embossed portions are abutted and fastened and fixed. Good.

Further, the pillar 5 of the radiator core support panel 1 is connected to the flange 11 at the rear end of the bumper stay 11.
b, it may be fastened and fastened to the overlapping portion of the front end flange 7a of the front side member 7 and the end cover 8 on the contrary, or it may be fastened by the bolt 25 and the nut 26. The fixing point is the flange 11 shown in FIG.
The position is not limited to the upper and lower positions of b, but may be any area where the flange 11b and the pillar 5 overlap, or any area where the end cover 8 (or the flange 7a) and the pillar 5 overlap.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a main part of FIG. 1;

FIG. 3 is a sectional view of a portion corresponding to line AA in FIG. 2;

FIG. 4 is a sectional view of a portion corresponding to line BB in FIG. 2;

[Explanation of symbols]

 Reference Signs List 1 radiator core support panel 7 front side member 9 bumper reinforcement 11 bumper stay 16 embossed part 17 opening

Continued on the front page (72) Inventor Masahiro Shimizu 5-24-15 Minamidai, Nakano-ku, Tokyo Inside Calsonic Nick Kansei Corporation (72) Inventor Daizo Miyata 2 Takaracho, Kanagawa-ku, Yokohama-shi, Kanagawa Nissan Motor Co., Ltd. Terms (reference) 3D003 AA11 AA18 BB02 CA02 CA04 CA09 DA04 DA14

Claims (2)

[Claims] 1. A front end of a front side member (7) extending in the vehicle front-rear direction on both sides in the vehicle width direction at the front of the vehicle body, and a bumper stay (7) mounted on both sides in the vehicle width direction of a bumper reinforcement (9). 11) is disposed substantially coaxially with the front side member (7) with the radiator core support panel (1) at the front end of the vehicle body interposed therebetween, and the radiator core support panel (1) is mounted at the rear end of the bumper stay (11). Alternatively, the radiator core support panel (1) may be partially fixed to one of the front end of the front side member (7) and the rear end of the bumper stay (11). ), And the front ends of the front side members (7) and the rear ends of the bumper stays (11) are directly abutted and fastened and fixed. A front structure of a vehicle body, wherein a support load between a front side member (7) and a bumper stay (11) is not applied to a support panel (1). 2. A radiator core support panel (1) having a plurality of openings (17) having a relatively small diameter, and one of a front end of a front side member (7) and a rear end of a bumper stay (11). A plurality of embossed portions (16) inserted into the opening (17) corresponding to the opening (17), and a rear end of the bumper stay (11) through the embossed portion (16). A front structure of a vehicle body, wherein a front end of a front side member (7) is directly abutted.