JP3274357B2 - Car body front 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 front structure of a vehicle body, and more particularly to a structure around a joint between a hood ridge panel and a radiator core support panel.

[0002]

2. Description of the Related Art FIG. 3 shows a structure around a connecting portion between a conventional hood ridge panel and a radiator core support panel. A vertical wall 22 of a hood ridge panel 21 constituting a side wall of an engine room ER is provided. The hood ridge reinforcement 23 is joined to the outside of the upper end to form a skeleton 27 having a closed cross section extending in the front-rear direction.

[0003] The hood ridge reinforcement 23 has an upper wall 2.
4, a side wall 25 and a lower wall 26 are formed in a U-shaped cross section, and an upper edge flange is formed by bending the upper wall 24 at the upper end of the vertical wall 22 of the hood ridge panel 21 toward the engine room ER. An edge flange 26a bent on the edge of the lower wall 26 is overlapped on the outer surface of the vertical wall 22 and joined by spot welding.

The upper wall 2 of Hood Ridge Reinforce 23
At the front end of 4, a mating flange 28 bent upward at substantially the center of the closed cross section of the skeleton portion 27 is formed by bending, and a notch 29 for cutting and raising the mating flange 28 is formed. .

A downward bent edge 24a is formed at the edge of the upper wall 24 to cover the terminal of the upper edge flange 22a of the hood ridge panel 21 in order to prevent rusting. Since the mating flange 28 and the notch 29 exist as described above, the front side formation range of the bent edge 24a ends near the notch 29.

The hood ridge panel 21 is provided with a hood ridge reinforcement 23 and front end flanges 21 a, 23 a formed on the front end of the hood ridge panel 21.
1 is superposed on the back surface and joined by spot welding.

[0007] The radiator core support panel 30 has a radiator core upper rail 32 as a frame member in the vehicle width direction at the upper edge thereof.

The radiator core upper rail 32 is formed in a substantially hat-shaped cross section by a front wall 33, an upper wall 34, and a rear wall 35. On both sides, a rear wall 35 is provided for assembling a head lamp unit (not shown). Is formed as a flat edge 35a parallel to the upper wall 34, and a rear extending portion 36 composed of the upper wall 34 and the flat edge 35a is formed at both ends of the radiator core upper rail 32.

The rear extending portion 36 is formed by bending an upwardly directed mating flange 37 on an outer side edge thereof, and the rear extending portion 36 is connected to the upper edge flange 22 a of the hood ridge panel 21.
Are overlapped on the front end of the hood Ridge Reinforce 23 and are joined by spot welding.

This similar structure is disclosed, for example, in Japanese Patent Laid-Open No. 4-224.
No. 473.

[0011]

Since the notch 29 is formed at the front end of the upper wall 24 of the hood ridge reinforcement 23 to cut and raise the mating flange 28 as described above, the skeleton 27 is formed. When the front suspension input acts on the hood ridge panel 21 in an inwardly falling direction, the notch forming portion becomes a fragile portion, so that stress tends to concentrate. In addition, there is a possibility that load transmission to the radiator core upper rail 32 side may not be performed properly.

On the other hand, as shown in, for example, JP-A-6-92149, connecting pieces are provided on both side ends of the radiator core upper rail toward the rear from the upper wall thereof, and the connecting pieces are connected to each other. It is also known to join the hood ridge reinforcement to the front end of the upper wall by spot welding.However, in this case, the front suspension input acting in the falling direction on the hood ridge panel is applied to the spot joint of the connection piece. It tends to act as a peeling load,
The load may not be sufficiently transmitted from the hood ridge panel to the radiator core upper rail.

Therefore, the present invention can increase the rigidity of the joint between the skeleton front end of the closed cross-section at the upper part of the hood ridge panel and the radiator core upper rail without using a dedicated reinforcing material, and can improve the hood ridge panel. An object of the present invention is to provide a vehicle body front structure capable of further increasing inward stiffness.

[0014]

According to the first aspect of the present invention, the upper wall of the hood ridge reinforcement, which is superimposed and joined on the upper edge flange of the hood ridge panel, is connected to the hood ridge panel and the hood ridge reinforcement. A bent edge that is formed in a solid state up to the front end of the skeleton portion of the closed cross section formed by the above and that is bent downward at the edge of the upper wall to cover the end of the upper edge flange of the hood ridge panel, Form a series up to the front edge of the wall,
The front edge with the hood ridge reinforcement
Radiator core support for bent front end flange
Panel radiator core
While bonding, the both end portions of the radiator core upper rail, and Kabenobe portion on a continuous upper wall of the upper radiator core member rail, and an inner bent edge which is continuous to the rear bent edge which is provided along the rear edge, A rear extending portion consisting of an outer bent edge continuous with the front wall is integrally formed toward the rear, and the rear extending portion is externally fitted on the front end of the skeleton portion having the closed cross section to extend the upper wall. The hood ridge reinforcement is connected to the upper wall of the hood ridge reinforcement, and the inner bent edge and the outer bent edge are overlapped with the bent edge and the side wall of the hood ridge reinforcement, respectively.

According to a second aspect of the present invention, the front wall of the radiator core upper rail has an outer end extending to the outer edge of the hood ridge reinforcement where the outer bent edge is located. It is characterized by being joined to the front end of the hood ridge reinforce at the section.

[0016]

According to the first aspect of the present invention, the skeleton portion of the closed cross section of the upper portion of the hood ridge panel is formed by forming the upper wall of the hood ridge reinforcement, which is the upper wall thereof, to the front end without fail. There is no fragile portion at the front end portion of the skeleton portion, and the rear extension portion of the radiator core upper rail is externally fitted to the front end portion of the skeleton portion so that the upper wall extension portion having a large overlapping area and the hood ridge reinforcement can be fitted. Since the skeleton section of the skeleton section extending in the front-rear direction and the skeleton section of the radiator core upper rail which is the vehicle width direction skeleton material are directly connected to each other by joining the walls, the skeleton section, the radiator core upper rail, The rigidity of the joint of the hood ridge panel is remarkably increased, and the load of the front suspension input acting on the hood ridge panel in the inward direction is favorably transmitted to the radiator core upper rail side. Inward falling rigidity of Jipaneru can be a increase further.

Further, since the bent edge of the edge of the upper wall of the hood ridge reinforcement is formed continuously up to the front end of the upper wall, the rust prevention effect of the upper edge flange end of the hood ridge panel can be enhanced. it can.

Further, the bent edge, the upper edge flange of the hood ridge panel, and the inner bent edge of the rear extending portion which is continuous with the rear bent edge of the radiator core upper rail are superposed and connected. Therefore, not only can the appearance be improved, but also vertical deformation of the edge of the upper wall of the hood ridge reinforcement due to the front suspension input can be prevented, and the upper wall and the upper edge flange of the hood ridge panel can be joined. The peeling load does not act on the portion, and the joining strength between the hood ridge panel and the hood ridge reinforcement can be increased.

According to the second aspect, the outer end of the front wall of the radiator core upper rail extends to the outer edge of the hood ridge reinforce and is joined to the front end of the hood ridge reinforce. The rigidity against such an inward falling input is further increased.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to the drawings.

1 and 2, reference numeral 1 denotes an engine room E.
The upper edge of the vertical wall 2 of the hood ridge panel constituting the side wall of the R is bent horizontally to the engine room ER side to form an upper edge flange 2a.

Reference numeral 3 denotes a hood ridge reinforcement formed in a U-shaped cross section by the upper wall 4, the side wall 5, and the lower wall 6, and the upper wall 4 is formed in a solid state without a notch portion up to its front end. The upper wall 4 is overlapped on the upper edge flange 2a and joined by spot welding, and the edge flange 6a of the lower wall 6 is overlapped on the outer surface of the vertical wall 2 and joined by spot welding. , The skeleton portion 7 having a closed cross section extending in the front-rear direction.

Further, at the edge of the upper wall 4 of the hood ridge reinforcement 3, a downward bent edge 4a is formed to cover the terminal of the upper edge flange 2a in order to prevent the terminal from rusting. The bent edge 4a is formed in a series of bends up to the front end of the upper wall 4 in addition to the fact that the upper wall 4 is formed in a solid state.

Numeral 8 denotes a radiator core support panel which constitutes a front wall of the engine compartments E and R. The hood ridge panel 1 is provided with hood ridge reinforcements 3 and front end flanges 1a, 3a which are bent and formed on their front edges. It is superposed on the back surface of the side panel 9 and joined by spot welding.

The radiator core support panel 8 has a radiator core upper rail 10 as a frame member in the vehicle width direction at an upper edge thereof.

The radiator core upper rail 10 is formed in a substantially hat-shaped cross section by a front wall 11, an upper wall 12, and a rear wall 13. On both sides, the rear wall 13 is provided for assembling a head lamp unit (not shown). The lower bent portion 13a is formed as a rear bent edge 13a with a reduced amount of protrusion.

At both ends of the radiator core upper rail 10, an upper wall extension 14a continuous with the upper wall 12 is provided.
A rear extending portion 14 composed of an inner bent edge 14b continuous with the rear bent edge 13a and an outer bent edge 14c continuous with the front wall 11 is integrally formed toward the rear.

The rear extending portion 14 is externally fitted on the front end of the skeleton 7 having the closed cross section, and the upper wall extending portion 14a is joined to the upper wall 4 of the hood ridge reinforcement 3 by spot welding. And the inner bent edge 14b and the outer bent edge 1
4c and the bent edge 4 of the food ridge reinforcement 3
a and the side wall 5 are overlapped with each other.

According to the structure of the above-described embodiment, the skeleton portion 7 having a closed cross section at the upper portion of the hood ridge panel 1 has the upper wall 4 of the hood ridge reinforcement 3, which is the upper wall thereof, positioned halfway until reaching the front end. It is formed in a solid state without a notch, and there is no fragile portion at the front end of the skeleton 7. The rear extension 14 of the radiator core upper rail 10 is fitted to the front end of the skeleton 7 so as to overlap. The radiator core upper rail 10, which is a skeletal section of the skeletal portion 7 that joins the upper wall extension portion 14a having a large area and the upper wall 4 of the hood ridge reinforcement 3 and extends in the front-rear direction, and a skeletal material in the vehicle width direction. Since the skeleton section is directly connected, the rigidity of the connection between the skeleton section 7 and the radiator core upper rail 10 can be significantly increased.

Accordingly, the load of the front suspension input acting on the hood ridge panel 1 in the inward falling direction to the radiator core upper rail 10 is favorably transmitted, and the inward falling rigidity of the hood ridge panel 1 is further increased. Quality and reliability can be improved. In particular, the front wall of the radiator core upper rail 10 is not only the front end flange 1a of the hood ridge panel 1, but also
Since it is also joined to the front end flange 3a of the hood ridge reinforcement 3, the inward falling rigidity is further improved.

The bent edge 4a formed at the edge of the upper wall 4 of the hood ridge reinforcement 3 is formed continuously up to the front end of the upper wall 4, so that the hood ridge panel 1
Since the end of the upper edge flange 2a can be completely covered up to its front end portion, the rust prevention effect of the end of the upper edge flange 2a can be enhanced.

Further, the rear extending portion 1 is connected to the bent edge 4a, the upper edge flange 2a of the hood ridge panel 2, and the rear bent edge 13a of the radiator core upper rail 10.
Since the three members of the hood ridge 4 and the inner bent edge 14b are overlapped and connected to each other, the appearance can be improved, and of course, the vertical undulation of the edge portion of the upper wall 4 of the hood ridge reinforcement 3 due to the front suspension input. The upper wall 4 and the upper edge flange 2 of the hood ridge panel 1 can prevent deformation.
A peeling load does not act on a joint portion with a, and the joining strength between the hood ridge panel 1 and the hood ridge reinforcement 3 can be increased.

[Brief description of the drawings]

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

FIG. 2 is a sectional view taken along the line AA of FIG. 1;

FIG. 3 is a perspective view showing a conventional structure.

[Explanation of symbols]

 Reference Signs List 1 food ridge panel 2a upper edge flange 3 food ridge reinforcement 4 upper wall of food ridge reinforcement 4a bent edge 5 food ridge reinforcement side wall 7 skeleton portion 8 radiator core support panel 10 radiator core upper rail 11 radiator core upper rail Front wall 12 Upper wall of radiator core upper rail 13a Rear bent edge 14 Rear extending portion 14a Upper wall extending portion 14b Inner bent edge 14c Outer bent edge

──────────────────────────────────────────────────続 き Continuation of the front page (72) Eiji Kikuchi, inventor Nissan Motor Co., Ltd., 2 Takaracho, Kanagawa-ku, Yokohama, Kanagawa Prefecture (56) References JP-A-4-224473 (JP, A) JP-A-4- 19279 (JP, A) JP-A-6-92149 (JP, A) JP-A-62-20763 (JP, A) JP-A-63-110174 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) B62D 25/08

Claims (2)

(57) [Claims] 1. An upper wall (4) of a hood ridge reinforcement (3) superposed and joined on an upper edge flange (2a) of the hood ridge panel (1) is joined to the hood ridge panel (1) and the hood ridge. The hood ridge panel (1) is formed in a seamless state up to the front end of the skeleton (7) having a closed cross section formed with the reinforcement (3) and bent downward at the edge of the upper wall (4). ) Upper edge flange (2
a) forming a series of bent edges (4a) covering the terminals up to the front end of the upper wall (4);
(1) with Foodridge Reinforce (3)
Front end flanges (1a), (3)
a) the radiator of the radiator core support panel (8)
While being overlapped and joined to the back of the taco side panel (9 ), both ends of the radiator core upper rail (10)
An upper wall extension (14a) connected to the upper wall (12) of the radiator core upper rail (10) and an inner bent edge (1) connected to a rear bent edge (13a) provided along the rear end edge.
4b) and an outer bent edge (14) continuous with the front wall (11).
c) is integrally formed toward the rear, and the rear extending portion (14) is externally fitted on the front end of the skeleton (7) having the closed cross section. The wall extension (14a) is joined to the upper wall (4) of the hood ridge reinforcement (3), and the inner bent edge (14b) and the outer bent edge (14) are joined.
c) on the bent edge (4a) and the side wall (5) of the hood ridge reinforce (3). 2. The radiator core upper rail (1)
0) of the front wall (11) has an outer bent edge (14).
2. The hood ridge reinforcement (3), which extends to an outer edge of the hood ridge (3), and is joined to the front end of the hood ridge reinforcement (3) at the outer end. The vehicle body front structure according to the above description.