JP2002293206A - Bumper for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a bumper capable of improving air flow separation performance and saving labor for setting the separation performance while securing freedom of design. SOLUTION: Recess parts 4d for fog lamps recessed rearward of a body from a surface 4h of the bumper 4 are formed at a right and left end parts of the bumper 4 by arranging vehicle outboard end parts thereof in adjacent to corner parts. Break separation generation parts 4m are formed at vehicle outboard end parts of the recess parts 4d for the fog lamps so as to rise from bottom surfaces 4g of the recess parts 4d for the fog lamps.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle bumper, and more particularly to a vehicle bumper having improved crosswind characteristics.
In order to further reduce the yawing moment coefficient (= Cr value), the present invention relates to a technique for causing separation of airflow flowing from the front of the vehicle body to the side of the vehicle body at the left and right corners of the front of the vehicle body. Thus, the present invention relates to a vehicle bumper suitable for being applied to a vehicle having a shape in which the front panel and the front shield forming the front surface of the vehicle are continuously provided and the front surface is standing.

[0002]

2. Description of the Related Art As described above, in a vehicle such as a one-box car or a truck in which a front panel and a front shield forming the front of the vehicle are continuously provided and the front is standing, Since the flow of air from the front side to the side surface is smooth, negative pressure is likely to be generated on the side surface of the vehicle, and the center of gravity of the vehicle is located ahead of the sedan type vehicle. For this reason, when a crosswind is received, a pressure difference is generated between the left and right sides of the vehicle, and a yawing moment is generated in the vehicle.

Therefore, as a conventional technique for preventing the influence of such a cross wind, for example, a technique described in Japanese Utility Model Publication No. 3-31353 and Japanese Utility Model Publication No. 3-13425 (hereinafter referred to as a first conventional technique), , Utility Model Registration 257673
No. 4 (this is referred to as a second prior art) is known.

[0004] In the first prior art, as shown in FIG.
A turbulent fin 02 protruding forward of the vehicle body is provided on the bumper 01 or a panel below the bumper, and the turbulent fin 02 has a plate-like protrusion as shown in FIG.
No. 31353), a projection having a triangular horizontal section as shown in FIG. 3B (Japanese Utility Model Publication No. 3-13425), or a bumper 01 or a part of a panel continuously bent and projected. It is good. In the first prior art, turbulent fins 02 cause turbulence in the air flowing from the front to the side of the vehicle body to separate the flow of air from the side of the vehicle body. The generated yawing moment can be reduced.

In the second prior art, as shown in a perspective view of FIG. 8A and a cross-sectional view of FIG. 8B, a separation generation step 06 is provided in a lamp mounting hole 05 formed in a bumper 04. The separation generation step 06 is such that the front of the lamp 07 is behind the bumper front 04f on the outside in the vehicle width direction, and the front of the lamp 07 is the bumper front 0 on the inside in the vehicle width direction.
The lamp 07 is provided at the outer end in the vehicle width direction of the lamp mounting hole 05 by arranging the lamp 07 at an angle so as to be the same as 4f. As a result, similarly to the first conventional technique, the flow of air on the side surface of the vehicle body is separated from the vehicle body, and the yawing moment generated when a cross wind is received can be reduced.

[0006]

However, the turbulent fins 02 and the separation generation step 06 in the above-mentioned prior art are not described.
Means for generating peeling such as is provided at a corner portion of the front of the vehicle body, this corner portion is curved so as to be disposed rearward from the center of the front of the vehicle body toward the outside in the vehicle width direction, Further, it is a portion that is largely (small R) bent along the side of the vehicle body. For this reason, in the first prior art, the turbulent fins 02 are formed to have a longer dimension in the vertical direction as compared with the second prior art, so that the area for separating the air flow can be increased. When installing on the outer surface,
For molding and design reasons, turbulent fins 02
It is difficult to increase the protrusion amount of However, if the amount of protrusion is small, the peeling performance cannot be secured. That is,
It is difficult to achieve a balance between securing the degree of freedom in modeling and obtaining high peeling generation performance.

On the other hand, in the second prior art, the vertical dimension of the separation generation step 06 is even smaller than the vertical dimension of the bumper 04, and the vertical dimension is small, so that it is difficult to obtain high separation generation performance. . In addition, the separation generation step 0
6 is formed by the step between the front surface of the lamp 07 and the edge of the lamp assembling hole 05, so that the shape of the lamp 07 is restricted. For example, in the case of a round lamp, it is difficult to provide the separation generation step 06 at the corners of the bumper 04 vertically. In addition, the lamp 0
Since the shape of the lamp 7 is restricted, for example, when the shape of the lamp 07 is changed by a minor change, it is necessary to restart the setting of the peeling performance from the beginning, which is troublesome. As described above, even in the second conventional technique, it is difficult to achieve both the degree of freedom in forming and the securing of the peeling performance, and it takes time to set the peeling performance.

The present invention has been made by focusing on the above-mentioned conventional problems, and aims at improving the air flow separation performance while securing the degree of freedom of molding, and also saves the trouble of setting the separation performance. The aim is to provide a bumper that can.

[0009]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention is directed to a vehicle mounted on a front surface of a vehicle body and separating a traveling wind from a side surface of the vehicle body near a corner formed from the front surface of the vehicle body to the side surface of the vehicle body. In a vehicle bumper in which a peeling generation unit to be projected is protruded from the bumper main body, a concave portion which is recessed toward the rear of the vehicle body from the bumper surface is provided at the left and right ends of the bumper main body, and the outer end of the bumper main body is formed at the corner portion The separation generating portion is formed near the vehicle exterior end of the concave portion, and is formed so as to rise from the bottom surface of the concave portion and protrude from the bumper surface.

[0010] The invention described in claim 2 is the same as the claim 1.
In the vehicle bumper described in the above, the bumper main body is formed in a curved shape that goes to the rear of the vehicle body toward the outside of the vehicle body at least in the vicinity of the left and right ends, and the peeling generation section is configured to move the vehicle body from the bottom surface of the concave portion. It is characterized in that it has a front surface protruding from the bumper surface toward the side, and a side surface extending rearward from the outside end of the front surface and converging on the bumper surface.

[0011] The invention according to claim 3 is based on claim 1.
3. In the vehicle bumper according to 2 or 3, the lamp is attached to the concave portion by cutting out a part of the bottom surface, and the lamp is attached such that the lamp front surface is not located forward of the bottom surface. It is characterized by.

[0012]

According to the present invention, when the traveling wind turns from the front of the vehicle body to the side of the vehicle along the bumper surface, a turbulent flow is generated by the protruding separation generating portion and the turbulent flow is separated from the side surface of the vehicle body to secure a yawing moment. Is done. Here, the separation generation performance of the separation generation unit depends on the protrusion amount of the separation generation unit, and the protrusion amount of the separation generation unit in the present invention is the protrusion amount from the bottom surface of the concave portion. In contrast, in the present invention, the amount of protrusion from the bumper surface is reduced by the depth of the concave portion. Therefore, in the present invention, it is possible to obtain a high peeling generation performance by increasing the substantial protrusion amount of the peeling generation section while suppressing the amount of protrusion from the bumper surface in the peeling generation section to increase the degree of freedom in modeling. The effect that it can be obtained is obtained.

According to the second aspect of the present invention, the bumper main body is formed in a curved shape which is directed toward the rear of the vehicle body toward the outside of the vehicle body. Direction, and a side surface that extends rearward from the outer end of the front side and converges on the bumper surface. Even if it is formed, it is possible to obtain a shape in which the amount of protrusion forward from the bumper surface is small, and it is possible to obtain the effect of reducing restrictions on molding and design.

According to the third aspect of the present invention, since the lamp is mounted in the concave portion so that the front surface of the lamp is not located forward of the bottom surface of the concave portion, the protrusion of the peeling generation portion is such that the portion where the lamp is mounted. In this case, the amount of protrusion from the lamp front surface is obtained, and when the lamp front surface is disposed behind the bottom surface, the effect of improving the peeling generation performance is obtained.In addition, regardless of the shape of the lamp, As the peeling performance, a performance based on the amount of protrusion from the bottom surface can be obtained.For example, even if the specification of the lamp is changed due to a minor change, the expected peeling performance can be secured, There is no need to start over from the beginning in response to a specification change, and it is possible to save time and effort in setting as compared with the related art.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a perspective view showing a front portion of a vehicle to which a vehicle bumper according to Embodiment 1 of the present invention is applied. This vehicle is a so-called one-box car. On the front of the vehicle, a front panel 1 and a windshield 2 are continuously arranged to form a vehicle front 3 standing upright. The lower end of the vehicle front face 3 is provided with the first embodiment.
A vehicle bumper (hereinafter, simply referred to as a bumper) 4 extends in the vehicle width direction, and lamp devices 5 and 5 are provided adjacent to upper sides of both left and right ends of the bumper 4.

FIG. 2 is a perspective view showing the bumper 4. The base 4b extends in the vehicle width direction as shown in the figure as a bumper main body, and the vehicle extends from the left and right sides of the base 4b to the side of the vehicle. The wraparound portions 4c, 4c extending rearward
Are formed. The wraparound portion 4c is formed on the side surface 4s.
Are formed flat.

At the left and right ends of the base 4b, there are formed horizontally-long, substantially rectangular fog lamp recesses 4d recessed from the surface (bumper surface) 4h of the base 4b.
An air inlet 4 is provided on the bottom surface 4g of the fog lamp recess 4d.
f is open. The air intake 4f is opened for cooling an oil cooler (not shown). further,
The bottom surface 4g of the fog lamp concave portion 4d is the same as S3-S in FIG.
As shown in FIG. 3, which is a cross section, the base 4b is formed in a gently curved surface shape toward the rear toward the outside similarly to the shape change of the base 4b, and a peeling generation unit 4m is provided at the outside end of the bottom surface 4g. Is provided. The separation generation unit 4m has a bottom g
A front surface 41m that is different from the curved surface shape and that faces straight toward the vehicle body and protrudes from the surface 4h;
And a side surface 42m that extends rearward from the outer end of the vehicle and that converges on the general portion of the base portion 4b. By the way, Embodiment 1
Bumper 4 has no fog lamp installed,
On the other hand, a later-described bumper 24 according to a second embodiment has a specification in which the fog lamp 6 is installed.

Next, FIG. 4 is a cross-sectional view showing the lamp device 5. A peeling generation portion 55 having a triangular cross section is also formed at a corner portion of a lens 54 covering the front surface of the lamp device 5. In FIG. 5, 52 is a lamp housing, 56 is a turn signal lamp, and 58 is a lamp reflector.

In the bumper 4 configured as described above, when the traveling wind received at the front of the vehicle flows on the side of the vehicle during the traveling of the vehicle, turbulence occurs in the separation generating section 4m, and the turbulence is formed on the side of the vehicle. The yaw moment generated when the vehicle receives a crosswind can be reduced by reducing the negative pressure. In obtaining the peeling performance, in the bumper 4 of the first embodiment, the peeling performance corresponding to the dimension rising from the bottom surface 4g of the fog lamp recess 4d can be obtained in the peeling generation unit 4m. On the other hand, the size of the separation generating portion 4m actually protruding from the surface 4h of the bumper 4 is the size of the fog lamp concave portion 4d.
It is the size which deducted the depth. Therefore,
In the first embodiment, the amount of protrusion from the surface 4h in the peeling generation unit 4m is suppressed to be low, so that the degree of freedom in molding such as molding and design is improved, and the protrusion in the peeling generation performance is improved. It is possible to achieve both the securing of the amount and the obtaining of high peeling performance. Incidentally, when a wind tunnel experiment was performed, the yawing moment CYM when the first embodiment was not applied was 0.470, whereas the yawing moment CYM when the first embodiment was not applied was 0.470.
Was 0.423, and a remarkable effect was obtained.

Further, in the first embodiment, since the peeling generation section 55 is formed at the corner of the lens 54 covering the front surface of the lamp device 5 in addition to the peeling generation section 4m of the bumper 4, The area where the separation is generated increases, and the crosswind characteristics can be improved. 52 is a lamp housing, 56 is a bulb of a turn signal lamp, and 58 is a lamp reflector.

(Embodiment 2) Next, a bumper 24 of Embodiment 2 will be described. As described above, the bumper 24 of the second embodiment has a specification in which the fog lamp 6 is attached to the bumper shown in the first embodiment, and the basic configuration is the same as that of the first embodiment. Therefore, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

FIG. 5 is a front view of a main part of the bumper 24 according to the second embodiment, and FIG. 6 is a sectional view taken along line S6-S6 of FIG.
In this bumper 24, the bottom surface 4g of the fog lamp recess 4d is cut out in a substantially rectangular shape so that the lamp mounting hole 24f is formed.
The fog lamp 6 is mounted in the lamp mounting hole 24f via a finisher 24j.
The finisher 24j has a lamp mounting hole 24f.
An outer frame 24k disposed along the outer peripheral edge of the fog lamp concave portion 4d with a clip (not shown), and a support frame 24n provided inside the outer frame 24k and having the fog lamp 6 attached thereto. The finisher 24j has open air inlets 24p, 24p.

As shown in FIG. 6, the fog lamp 6 is elastically attached to the support frame 24n via a retainer 61, and the front surface 6h of the lamp corresponds to the fog lamp recess 4d in the first embodiment. It is arranged at a position slightly deeper than the position where the bottom surface 4g was arranged.

In the second embodiment, the substantial protrusion amount of the separation generating portion 4m is from the lamp front surface 6h.
Although the amount of protrusion from the base 4b is the same as in the first embodiment, the substantial amount of protrusion from the lamp front surface 6h is greater than in the first embodiment. The yawing moment CYM was 0.404, which was better than that of the first embodiment.

Further, in the second embodiment, the separation generation performance of the separation generation unit 4m is ensured by the bottom surface 4g. Therefore, even if the setting such as the shape of the fog lamp 6 is changed due to a minor change or the like, if the lamp front surface 6h is installed so as not to be located forward of the bottom surface 4g, at least the position of the bottom surface 4g is determined. Since the required performance can be obtained, it is not necessary to restart the setting from the beginning in response to the change in the specification of the lamp, and it is possible to save the trouble of setting as compared with the related art.

Although the embodiment has been described with reference to the drawings, the present invention is not limited to this. For example, the shape of the separation generating unit 4m is not limited to the shape shown in the embodiment, but in essence, any shape that can form a turbulent flow such that the traveling wind is separated from the side surface of the vehicle body. Further, the bumpers 4 and 24 may have a shape that does not have the wraparound portion 4c. In addition, although the concave portion 4d for fog lamp is shown as the concave portion, the concave portion is not limited to the fog lamp.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a front portion of a vehicle to which a vehicle bumper according to Embodiment 1 of the present invention is applied.

FIG. 2 is a perspective view showing a bumper of the vehicle to which the first embodiment is applied.

FIG. 3 is a sectional view taken along line S3-S3 of FIG. 2;

FIG. 4 is a sectional view showing a main part of the first embodiment.

FIG. 5 is a front view of a main part of a vehicle bumper according to a second embodiment.

FIG. 6 is a sectional view taken along line S6-S6 of FIG. 5;

FIG. 7 is a sectional view showing a conventional technique.

FIG. 8 is a perspective view and a sectional view showing a conventional technique.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 front panel 2 windshield 3 front of vehicle 4 bumper (vehicle bumper of first embodiment) 4b base 4c wraparound portion 4d recess for fog lamp 4f air intake 4g bottom surface 4h surface 4m peeling generation portion 4s side surface 5 lamp device 6 fog lamp 6h Lamp Front 24 Bumper (Vehicle Bumper of Second Embodiment) 24f Lamp Assembly Hole 24j Finisher 24k Outer Frame 24n Supporting Frame 24p Air Intake 41m Front 42m Side 51 51 Separation Generator 54 Lens 55 Separation Generator 61 Retainer

Claims (3)

[Claims] 1. A vehicle bumper mounted on a front surface of a vehicle body and having a separation generating portion projecting from a bumper body near a corner portion formed from the front surface of the vehicle body to the side surface of the vehicle body. In the left and right ends of the bumper main body, a concave portion recessed from the bumper surface toward the rear of the vehicle body is formed by arranging the outer end portion near the corner portion, and the outer end portion of the concave portion The bumper for a vehicle, wherein the separation generating portion rises from a bottom surface of the concave portion and protrudes from a surface of the bumper. 2. The bumper main body is formed in a curved shape toward the rear of the vehicle body toward the outside of the vehicle body at least in the vicinity of the left and right end portions, and the peeling generation section is formed on a side of the vehicle body from a bottom surface of the concave portion. The vehicle bumper according to claim 1, further comprising: a front surface protruding from the surface of the front bumper; and a side surface extending rearward from an outer end of the front surface and converging on the bumper surface. . 3. A lamp is mounted in the recess by cutting out a part of the bottom surface, and the lamp is mounted such that a front surface of the lamp is not disposed forward of the bottom surface. Item 3. A vehicle bumper according to item 1 or 2.