JP3965928B2 - Bumper for vehicle - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle bumper, and in particular, in order to improve the crosswind characteristics of the vehicle, that is, to reduce the yawing moment coefficient (= Cr value), the vehicle body side surface from the front surface of the vehicle body at the left and right corner portions of the vehicle body front portion. This is related to the technology that causes separation of the airflow flowing to the vehicle, such as one-box cars and trucks, where the front panel and front shield that form the front of the vehicle are continuously provided and the front is standing up The present invention relates to a vehicle bumper suitable for application.
[0002]
[Prior art]
As described above, in the case of a vehicle having a front surface that is continuously provided with a front panel and a front shield that form the front surface of the vehicle, such as a one-box car and a truck, Since the air flow is smooth, negative pressure is likely to be generated on the side of the vehicle, and the center of gravity of the vehicle is ahead of the sedan type vehicle.
For this reason, when a cross wind is received, a pressure difference occurs between the left and right sides of the vehicle, which causes a yawing moment in the vehicle.
[0003]
Therefore, as a conventional technique to prevent the influence of such a cross wind, for example, (this is the first prior art) real fair 2 -31353 discloses and actual fair 3-13425 Patent Publication described technology and, utility model The technique of registration No. 2576734 (this is the second conventional technique) is known.
[0004]
In the first prior art, as shown in FIG. 7, a turbulent fin 02 projecting forward of the vehicle body is provided on a bumper 01 or a panel under the bumper, and this turbulent fin 02 is shown in FIG. the plate-like protrusion as shown in (real fair 2 -31353 No.) But even projecting horizontal cross section as shown in FIG. 5 (b) is a triangular shape (the actual fair No. 3-13425) or the bumper 01 and-panel, That is, the portion may be continuously bent and protruded. In the first prior art, when the turbulent fins 02 cause turbulent flow in the air flowing from the front side of the vehicle body to the side, the air flow is separated from the side surface of the vehicle body, thereby receiving a cross wind. The generated yawing moment can be reduced.
[0005]
In the second prior art, as shown in the perspective view of FIG. 8A and the cross-sectional view of FIG. 8B, a separation generation step 06 is provided in the lamp built-in hole 05 formed in the bumper 04. The separation generation step 06 is such that the front surface of the lamp 07 is rearward of the bumper front surface 04f on the outer side in the vehicle width direction, and the front surface of the lamp 07 is the same as the bumper front surface 04f on the inner side in the vehicle width direction. It is provided at the outer end of the lamp mounting hole 05 in the vehicle width direction by being inclined. As a result, as in the first prior art, the yawing moment generated when the airflow on the side surface of the vehicle body is separated from the vehicle body and a cross wind is received can be reduced.
[0006]
[Problems to be solved by the invention]
However, the means for generating separation such as the turbulent fins 02 and the separation generation step 06 in the above-described prior art is provided at the corner portion of the front portion of the vehicle body. It is a portion that is curved so as to be arranged rearward as it goes outward in the direction, and is further bent (largely R) along the side of the vehicle body. For this reason, in the first conventional technique, the turbulent fin 02 can be formed to be longer in the vertical direction than the second conventional technique to increase the area for separating the air flow. When it is provided on the outer surface, it is difficult to increase the protruding amount of the turbulent fin 02 due to molding and design reasons. However, when this protrusion amount becomes small, the peeling performance cannot be secured. That is, it is difficult to achieve a balance between ensuring the degree of modeling freedom and obtaining high peel generation performance.
[0007]
On the other hand, in the second prior art, the vertical dimension of the peeling generation step 06 is further smaller than the vertical dimension of the bumper 04, the vertical dimension is small, and it is difficult to obtain high peeling generation performance.
In addition, since the separation generation step 06 is formed by a step between the front surface of the lamp 07 and the end edge portion of the lamp assembly hole 05, the shape of the lamp 07 is restricted. For example, in the case of a round lamp, it is difficult to vertically provide the separation generation step 06 at the corner portion of the bumper 04.
In addition, since the shape of the lamp 07 is restricted in this way, for example, when the shape of the lamp 07 is changed by a minor change, it is necessary to set the peeling performance again 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 of modeling and the securing of the peeling performance, and it takes time to set the peeling performance.
[0008]
The present invention has been made by paying attention to the above-mentioned conventional problems, and can improve the air flow separation performance while ensuring the degree of freedom of modeling, and in addition, it can save the labor of setting the separation performance. The purpose is to provide bumpers.
[0009]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention is provided with a separation generating part that protrudes from a bumper body in the vicinity of a corner part that is attached to the front surface of a vehicle body and is formed from the front surface of the vehicle body to the side surface of the vehicle body. In the vehicle bumper that has been
A base portion extending in the vehicle width direction as the bumper body, and a wraparound portion extending from the left and right of the base portion to the vehicle side portion and extending to the rear of the vehicle,
The right and left ends of the bumper body, the recess which is recessed toward the rear of the vehicle body from the bumper surface, the ends of the car outer is arranged in the vicinity of the corner formed by Rutotomoni, the bottom surface of the recess the base Like the shape change, the outer side of the vehicle is formed in a gently curved surface shape toward the rear,
The peeling generation portion rises from the bottom surface of the concave portion at the vehicle outer end of the concave portion, and is formed so as to protrude straight from the curved surface shape of the bottom surface to the side of the vehicle body and beyond the bumper surface. A front surface facing the front of the vehicle, and a side surface facing the vehicle side that is bent and extended at a substantially right angle toward the rear from the vehicle outer end portion of the front surface and converges on the bumper surface of the base and is connected to the wraparound portion. Is formed into a substantially cross-sectional shape ,
The amount of protrusion of the peeling generation portion is constituted by the depth of the recess and the protrusion from the bumper surface.
[0010]
According to a second aspect of the present invention, in the vehicular bumper according to the first aspect, a lamp is attached to the recess by cutting out a part of the bottom surface, and the front surface of the lamp is the bottom surface. It is attached so that it may not arrange | position ahead .
[0012]
【The invention's effect】
In the present invention, when the traveling wind turns along the bumper surface from the front surface of the vehicle body to the vehicle body side, a turbulent flow is generated by the protruding separation generating portion and is separated from the side surface of the vehicle body, thereby securing a yawing moment.
Here, the peeling production | generation performance by a peeling production | generation part depends on the protrusion amount of a peeling production | generation part, and the protrusion amount of the peeling production | generation part in this invention turns into the protrusion amount from the bottom face of a recessed part. On the other hand, in the present invention, the amount of protrusion from the bumper surface is reduced by the depth of the recess.
Therefore, in the present invention, it is possible to obtain a high peel generation performance by increasing the substantial protrusion amount of the peel generation part while suppressing the protrusion amount from the bumper surface in the peel generation part and increasing the degree of freedom of modeling. The effect that it can be obtained.
[0013]
Further, bar damper body, whereas formed in a curved shape toward the rear of the vehicle body increases toward the outboard, the peeling generator, a front surface directed to the side of the vehicle body from the bottom of the recess, exterior of the front Since it is formed in a shape that has a side surface that extends rearward from the end portion and converges on the bumper surface, even if the amount of protrusion from the bottom surface of the peeling generation portion is formed large, the bumper surface moves forward. It is possible to obtain a shape with a small protrusion amount, and the effect that the restriction on molding and design can be reduced is obtained.
[0014]
In the second aspect of the present invention, since the lamp is attached to the recess so that the front surface of the lamp is not disposed in front of the bottom surface of the recess, the protrusion of the separation generating portion is located at the portion where the lamp is attached. When the front of the lamp is placed behind the bottom surface, the effect of improving the peel generation performance can be obtained, and in addition, the peel generation performance regardless of the lamp shape. As a result, performance based on the amount of protrusion from the bottom surface can be obtained.For example, even if there is a change in the lamp specifications due to minor changes etc., the expected peeling generation performance can be secured, and the lamp specifications can be changed. Correspondingly, it is not necessary to redo the setting from the beginning, and it is possible to save the setting effort as compared with the conventional case.
[0015]
DETAILED DESCRIPTION OF THE INVENTION
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, and on the front surface of the vehicle, the front panel 1 and the windshield 2 are continuously arranged so that the front surface 3 of the vehicle stands up.
A vehicle bumper (hereinafter simply referred to as a bumper) 4 according to the first embodiment extends in the vehicle width direction at the lower end portion of the vehicle front surface 3 and is adjacent to the upper sides of the left and right end portions of the bumper 4. Lamp devices 5 and 5 are provided.
[0016]
FIG. 2 is a perspective view showing the bumper 4. The base 4b extends as the bumper body in the vehicle width direction as shown in the figure, and extends backward from the left and right of the base 4b to the vehicle side. The existing wraparound portions 4c and 4c are formed. The wraparound portion 4c has a flat side surface 4s.
[0017]
Further, at the left and right ends of the base portion 4b, a horizontally elongated fog lamp recess 4d that is recessed from the surface (bumper surface) 4h of the base portion 4b is formed, and air is formed on the bottom surface 4g of the fog lamp recess 4d. The intake 4f is opened. The air intake 4f is opened for cooling an oil cooler (not shown). Further, the bottom surface 4g of the fog lamp recess 4d is formed in a gently curved shape toward the rear toward the rear of the vehicle as in the shape change of the base 4b as shown in FIG. 3 which is a cross section of S3-S3 in FIG. And the peeling production | generation part 4m is provided in the vehicle outer side edge part of the bottom face 4g. Unlike the curved shape , the peeling generation part 4m has a front surface 41m that extends straight from the surface 4h to the side of the vehicle body, unlike the curved shape, and extends rearward from the vehicle outer end of the front surface 41m. It is formed in a substantially U-shaped cross-sectional shape by a side surface 42m that converges by hitting the general portion 4b. Incidentally, the bumper 4 of the first embodiment has a specification in which no fog lamp is installed, while the bumper 24 of the second embodiment to be described later has a specification in which the fog lamp 6 is installed.
[0018]
Next, FIG. 4 is a cross-sectional view showing the lamp device 5, and a peeling generation portion 55 having a triangular cross-sectional shape is also formed at a corner portion of the 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.
[0019]
In the bumper 4 configured as described above, when the traveling wind received on the front surface of the vehicle flows on the side surface of the vehicle when the vehicle travels, turbulent flow is generated in the separation generating unit 4m, and the negative pressure formed on the side surface of the vehicle body Can be reduced to reduce the yawing moment generated when the vehicle receives a crosswind.
In obtaining the peeling generation performance, in the bumper 4 of the first embodiment, the peeling generation portion 4m can obtain the peeling performance corresponding to the dimension rising from the bottom surface 4g of the fog lamp recess 4d. On the other hand, the dimension in which the peeling generation part 4m actually protrudes from the surface 4h of the bumper 4 is a dimension obtained by subtracting the depth of the fog lamp recess 4d.
Accordingly, in the first embodiment, the amount of protrusion from the surface 4h in the peel generation part 4m is suppressed to be low, and the degree of freedom of molding such as molding and design is improved, and the peel generation performance is improved. It is possible to achieve both the securing of the amount of protrusion and obtaining high peel generation performance.
Incidentally, when a wind tunnel experiment was conducted, the yawing moment CYM in the case of not applying the first embodiment was 0.470, whereas the yawing moment CYM in the first embodiment was 0.423. And a remarkable effect was obtained.
[0020]
Further, in the first embodiment, since the peeling generation part 55 is formed in the corner part of the lens 54 that covers the front surface of the lamp device 5 in addition to the peeling generation part 4 m of the bumper 4, the peeling generation is generated. The area to be performed is increased, and the crosswind characteristics can be improved.
Note that 52 is a lamp housing, 56 is a bulb of a turn signal lamp, and 58 is a lamp reflector.
[0021]
(Embodiment 2)
Next, the bumper 24 of the second embodiment 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.
[0022]
FIG. 5 is a front view of the main part of the bumper 24 according to the second embodiment, and FIG. 6 is a sectional view taken along the line S6-S6 in FIG.
In the bumper 24, the bottom surface 4g of the fog lamp recess 4d is cut out into a substantially rectangular shape to open a lamp mounting hole 24f, and the fog lamp 6 is mounted to the lamp mounting hole 24f via a finisher 24j. ing.
The finisher 24j is disposed along the outer peripheral edge of the lamp mounting hole 24f and is fixed to the fog lamp recess 4d by a clip (not shown), and the fog lamp is provided inside the outer frame 24k. 6 and a support frame 24n attached thereto, and air inlets 24p, 24p are opened in the finisher 24j.
[0023]
Further, as shown in FIG. 6, the fog lamp 6 is elastically attached to the support frame 24n via a retainer 61, and the lamp front surface 6h is formed by the bottom surface 4g of the fog lamp recess 4d in the first embodiment. It is arranged at a position slightly behind the position where it was arranged.
[0024]
In the second embodiment, the substantial protrusion amount of the separation generating portion 4m is from the lamp front surface 6h, whereas the protrusion amount from the base portion 4b is the same as that of the first embodiment. The substantial amount of protrusion from the lamp front surface 6h is larger than that of the first embodiment, and according to the wind tunnel experiment result, the yawing moment CYM is 0.404, which is better than that of the first embodiment. .
[0025]
In the second embodiment, the peeling generation performance by the peeling generation unit 4m is ensured by the bottom surface 4g. Therefore, even if 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 in front of the bottom surface 4g, the position is determined at least at the bottom surface 4g position. Therefore, it is not necessary to set again from the beginning in response to a change in lamp specifications, and it is possible to save the setting effort as compared with the conventional case.
[0026]
As mentioned above, although embodiment was described with drawing, this invention is not limited to this.
For example, the shape of the separation generating unit 4m is not limited to that shown in the embodiment, and may be any shape that can form a turbulent flow so 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.
Further, although the fog lamp recess 4d is shown as the recess, the recess 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 a first embodiment of the present invention is applied.
FIG. 2 is a perspective view showing a vehicle bumper to which the first embodiment is applied.
3 is a cross-sectional view taken along line S3-S3 of FIG.
4 is a cross-sectional view showing a main part of the first embodiment. FIG.
FIG. 5 is a front view of a main part of a vehicle bumper according to a second embodiment.
6 is a cross-sectional view taken along the line S6-S6 in FIG.
FIG. 7 is a cross-sectional view showing a conventional technique.
FIG. 8 is a perspective view and a cross-sectional view showing a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Front panel 2 Windshield 3 Vehicle front 4 Bumper (vehicle bumper of Embodiment 1)
4b Base portion 4c Wound portion 4d Fog lamp recess 4f Air intake port 4g Bottom surface 4h Surface 4m Separation generating portion 4s Side surface 5 Lamp device 6 Fog lamp 6h Lamp front surface 24 Bumper (vehicle bumper of the second embodiment)
24f Lamp assembly hole 24j Finisher 24k Outer frame 24n Support frame 24p Air intake port 41m Front surface 42m Side surface 51 Peeling generation unit 54 Lens 55 Peeling generation unit 61 Retainer

Claims (2)

In the vehicle bumper mounted on the front surface of the vehicle body, in the vicinity of the corner portion formed from the front surface of the vehicle body to the side surface of the vehicle body, a separation generating portion for separating the traveling wind from the side surface of the vehicle body protrudes from the bumper body.
A base portion extending in the vehicle width direction as the bumper body, and a wraparound portion extending from the left and right of the base portion to the vehicle side portion and extending to the rear of the vehicle,
The right and left ends of the bumper body, the recess which is recessed toward the rear of the vehicle body from the bumper surface, the ends of the car outer is arranged in the vicinity of the corner formed by Rutotomoni, the bottom surface of the recess the base Like the shape change, the outer side of the vehicle is formed in a gently curved surface shape toward the rear,
The peeling generation portion rises from the bottom surface of the concave portion at the vehicle outer end of the concave portion, and is formed so as to protrude straight from the curved surface shape of the bottom surface to the side of the vehicle body and beyond the bumper surface. A front surface facing the front of the vehicle, and a side surface facing the vehicle side that is bent and extended at a substantially right angle toward the rear from the vehicle outer end portion of the front surface and converges on the bumper surface of the base and is connected to the wraparound portion. Is formed into a substantially cross-sectional shape ,
A bumper for a vehicle, characterized in that the amount of protrusion of the peeling generation portion is constituted by the depth of the recess and the protrusion from the bumper surface. 2. The lamp according to claim 1 , wherein a lamp is attached to the recess by cutting out a part of the bottom surface, and the lamp is attached so that a front surface of the lamp is not disposed forward of the bottom surface. Bumper for vehicles.

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