JP4195626B2 - Bottom structure of radiator core support panel - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bottom structure of a radiator core support panel that supports a radiator and is disposed inside an engine room of a vehicle. More specifically, the present invention relates to a radiator core support panel in which a plurality of vertical ribs are formed on the bottom of the radiator core support panel. Relates to the bottom structure.
[0002]
[Prior art]
Usually, a radiator, which is one of heat exchangers, is arranged inside an engine room of a vehicle body via a radiator core support panel (see, for example, Patent Document 1). A hood panel is disposed above the radiator. In order to efficiently absorb the collision load input to the hood panel when the vehicle has a frontal collision, it is provided between the upper surface of the radiator and the hood panel. For this, it is desirable to increase the interval in the vertical direction. Therefore, in order to keep the mounting position of the radiator itself low, it is desired to arrange the radiator core support panel at a low position.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 2002-240744
[Problems to be solved by the invention]
However, in the conventional radiator core support panel, when the bottom height of the radiator core support panel is lowered, the sectional moment of the support member provided on the bottom is reduced, and the support rigidity of the radiator core support panel is low. turn into. For this reason, it has been difficult to reduce the height position of the radiator core support panel. In other words, from the viewpoint of absorbing the collision load, the bottom height of the radiator core support panel is desired to be lowered. However, if the height is lower than the predetermined height, the support rigidity of the radiator core support panel may be lowered.
[0005]
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a bottom structure of a radiator core support panel that can reduce the height position of the radiator while maintaining the support rigidity of the radiator core support panel.
[0006]
[Means for Solving the Problems]
The bottom structure of the radiator core support panel described in claim 1 is a bottom structure of a radiator core support panel in which plate-like vertical ribs extending along the vehicle longitudinal direction are provided at the bottom of the radiator core support panel. The vertical rib is formed such that the height on the front side of the vehicle is high and gradually decreases toward the rear side, and the vertical rib is inclined diagonally to the left front and the first vertical rib extending diagonally to the right front. A plurality of second vertical ribs are formed, and the first vertical ribs and the second vertical ribs are crossed with each other, and the first vertical ribs and the second vertical ribs are connected to each other at the crossing portion. A plurality of lattice shapes are formed, and openings serving as radiator support portions are provided on both the left and right sides of the bottom, and the inclination angle of the first vertical rib and the inclination angle of the second vertical rib between the openings, and the opening By changing the inclination angle of the first vertical rib and the inclination angle of the second vertical rib on both sides in the vehicle width direction, the area of the lattice shape surrounding the opening is set smaller than the area of the lattice shape between the left and right openings characterized in that it was.
[0008]
The bottom structure of the radiator core support panel according to claim 2 is the bottom structure of the radiator core support panel according to claim 1 , wherein the rear end of the vertical rib extends in the vehicle width direction. It is characterized by being connected by a rib.
[0009]
【The invention's effect】
According to the bottom structure of the radiator core support panel described in claim 1, since the vertical rib is formed so that the height on the front side of the vehicle is high and gradually decreases toward the rear side, the radiator The height position of the radiator supported by the core support panel can be lowered, and the rigidity of the bottom of the radiator core support panel can be maintained. Conventionally, if the height of the radiator is lowered, the rigidity of the bottom of the radiator core support panel is reduced. On the other hand, the rigidity of the bottom of the radiator core support panel is increased by increasing the height of the radiator. As a result, it was impossible to obtain a radiator core support panel having a structure satisfying both requirements. However, according to the present invention, the two requirements of improving the efficiency of absorbing the collision load at the time of the vehicle collision and maintaining the rigidity of the bottom of the radiator core support panel can be satisfied at the same time, which is very rational. Is.
[0010]
According to the bottom structure of the radiator core support panel according to claim 1, for extending the vertical ribs obliquely forward and crossed with each other, it is possible to further improve the rigidity of the bottom portion of the radiator core support panel. In particular, at the intersecting portions, the longitudinal ribs are connected to each other, so that the rigidity of the longitudinal ribs is particularly large.
[0011]
According to the bottom structure of the radiator core support panel described in claim 2 , since the rear end of the vertical rib is connected by the horizontal rib extending along the vehicle width direction, the rigidity of the vertical rib is further improved. Can be made. As a result, the value of the moment of inertia of the rib cross section is increased, so that the height of the radiator can be lowered and the vertical distance between the upper surface of the radiator and the hood panel can be increased by keeping the height of the vertical rib low. it can.
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
[0013]
FIG. 1 is a perspective view of a front end module 11 in which a radiator core support panel 10 according to an embodiment of the present invention is modularized as seen from the back side.
[0014]
The front end module 11 includes a front bumper 12 disposed at the front end of the vehicle, a radiator core support panel 10 disposed on the rear side of the front bumper 12, and headlamps 13 and 13 disposed on the upper left and right ends of the front bumper 12. It consists of and.
[0015]
As shown in FIG. 2, the radiator core support panel 10 is integrally formed of synthetic resin, and circular openings 15, 15 are provided on the left and right sides of the fan shroud 14 formed in a substantially rectangular shape. It has been. A stay 16 is formed in the opening 15, and an electric fan (not shown) is rotatably supported by the stay 16.
[0016]
FIG. 3 is a perspective view of the radiator core support panel 10 as seen from the front side of the vehicle, and clearly shows the bottom 17 thereof. FIG. 4 is a bottom view of the radiator core support panel 10, and FIG. 5 is a side view of the radiator core support panel 10.
[0017]
As shown in these drawings, a plurality of obliquely extending vertical ribs 18 intersect with each other on the lower surface of the bottom portion 17 of the radiator core support panel 10 in a substantially lattice shape. That is, as shown in FIG. 4, the vertical rib 18 extending forward of the vehicle is composed of a first vertical rib 19 that extends diagonally to the right front and a second vertical rib 20 that extends diagonally to the left front. The first and second vertical ribs 19 and 20 are provided so as to cross each other, and are provided so as to be connected to each other at the crossing portion 21. The rear ends of the first and second vertical ribs 19 and 20 are connected by a horizontal rib 22 extending in the vehicle width direction. Further, the plurality of first vertical ribs 19 are also set so as not to be all parallel (the same applies to the second vertical ribs 20). The outer side in the vehicle width direction is set to be finer from the surrounding part. And while the front ends of the first vertical ribs 19 and the second vertical ribs 20 are connected to each other, the horizontal ribs that connect these cross-connecting front end portions 18a in the vehicle width direction are not set. The front edge wall including the connection front end portion 18a is in a zigzag state in the vehicle width direction, and its front side is open. Therefore, at the time of injection molding, the front edge portion can be removed from the front, and only the substantially lattice-shaped portion uses a slide die from below, so that the size of the lower slide die is as small as possible. It can be.
[0018]
And, as shown in FIG. 5, the radiator core support panel 10 is in a so-called backward tilted state in which the upper part is inclined rearward than the lower part, and a radiator (not shown) attached thereto is also tilted backward. As shown in FIGS. 5 and 6, the vertical rib 18 is formed in a substantially trapezoidal shape that is high on the vehicle front side and low on the vehicle rear side. In FIG. 6, the height of the rear side is formed in Hr while the height of the front side is Hf, becomes gradually lower the height toward the rear side from the front side, Hr <Hf It is formed like this.
[0019]
Thereby, as is apparent from FIG. 5, the lower surface of the vertical rib 18 is horizontal. Incidentally, 17b is an opening for a drain of a radiator (not shown). In this embodiment, since there is this opening 17b, one of the first vertical ribs 19 is interrupted at this portion. The front-rear direction ribs 18 b are set from the horizontal ribs 22 to the intersections of the first vertical ribs 19 and the second vertical ribs 20.
[0020]
The effect | action by the radiator core support panel which has the said structure is demonstrated.
[0021]
Since both the first and second vertical ribs 19 and 20 are formed so that the front side of the vehicle is high and the rear side of the vehicle is low, the value of the second moment of section is increased, and the rigidity of the radiator core support panel 10 is increased. This is advantageous in terms of ensuring. That is, generally rectangular cross-section secondary moment, if the width dimension b, the height of h, a bh ^3/12, the rib height h comes in at the third power value. For this reason, increasing the height greatly contributes to improving the strength of the rib. However, as described above, when the height of the bottom 17 of the radiator core support panel 10 is increased, the upper surface of the radiator becomes the hood panel. Approaching, it becomes difficult to absorb the collision load at the time of vehicle collision. Therefore, the height of the rib is reduced as much as possible by reducing the height of the rib as much as possible by making the rib trapezoidal as in this embodiment, instead of making the rib rectangular and simply lowering the height. You can also increase the value.
[0022]
Further, since the first and second vertical ribs 19 and 20 extend obliquely forward and cross each other, and the vertical ribs 18 and 18 are connected to each other at the intersecting portion 21, the vertical ribs 18 are simply The rigidity of the longitudinal ribs 18 can be improved as compared to the case where the longitudinal ribs 18 are extended in parallel with the vehicle longitudinal direction.
[0023]
Furthermore, since the rear ends of the vertical ribs 18 and 18 are connected by the horizontal ribs 22 at the rear ends of the vertical ribs 18, the rigidity of the vertical ribs 18 can be further improved.
[0024]
The present invention is not limited to the above-described embodiments, and various changes and modifications can be made based on the technical idea of the present invention.
[Brief description of the drawings]
FIG. 1 is a rear perspective view of a front end module having a radiator core support panel according to an embodiment of the present invention.
FIG. 2 is a perspective view showing the radiator core support panel of FIG. 1;
FIG. 3 is a perspective view of the radiator core support panel of FIG. 2 as viewed obliquely from below.
4 is a bottom view of the radiator core support panel of FIG. 2 as viewed from below. FIG.
FIG. 5 is a side view of the radiator core support panel of FIG. 2 as viewed from the side.
FIG. 6 is a schematic view showing a longitudinal rib according to the present embodiment.
[Explanation of symbols]
10 ... Radiator core support panel 17 ... Bottom 18 ... Vertical rib 22 ... Horizontal rib

Claims (2)

A bottom structure of a radiator core support panel in which a plate-like vertical rib (18) extending along the vehicle front-rear direction is provided on the bottom (17) of the radiator core support panel (10),
The vertical rib (18) is formed such that the height on the front side of the vehicle is high and gradually decreases toward the rear side ,
A plurality of the vertical ribs (18) are formed from a first vertical rib (19) extending obliquely to the right front and a second vertical rib (20) extending obliquely to the left front, and these first vertical ribs ( 19) and the second vertical rib (20) cross each other, and at the crossing portion (21), the first vertical rib (19) and the second vertical rib (20) are connected to each other to thereby form a plurality of parts on the bottom (17). While forming a lattice shape,
Openings (17a, 17a) that serve as support portions for the radiator are provided on both the left and right sides of the bottom (17), and the inclination angle of the first vertical rib (19) between the openings (17a, 17a) and the second vertical rib ( 20) and the inclination angle of the first vertical rib (19) and the inclination angle of the second vertical rib (20) on both sides in the vehicle width direction from the opening (17a, 17a),
A bottom structure of a radiator core support panel, wherein an area of a lattice shape surrounding the openings (17a, 17a) is set smaller than an area of the lattice shape between the left and right openings (17a, 17a) . Bottom structure of the radiator core support panel according to claim 1, trailing edge, characterized in that is connected by a transverse rib (22) extending along the vehicle width direction of the longitudinal ribs (18).

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