JP2016068808A - Vehicle deflector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deflector of a vehicle capable of reducing negative pressure at a rear end of a baffle plate portion, while allowing the baffle plate portion to have high rigidity and strength.SOLUTION: There is provided a deflector of a vehicle disposed on a top face of a bonnet 3 of a vehicle, and having: a baffle plate portion 13 inclined so as to be spaced apart from the bonnet as going backward of the vehicle; and an air duct opening 21 provided at the baffle plate portion, for guiding a part of aerodynamic drag to a back surface side of the baffle plate portion. At an opening edge of the air duct opening, there is formed a duct portion for guiding aerodynamic drag allowed to flow in from the air duct opening, to a part right under a rear end, in a vehicle longitudinal direction, of the baffle plate portion. This structure causes aerodynamic drag α flowing in from the air duct opening of the baffle plate portion to be guided to the part right under the rear end of the baffle plate portion where negative pressure is generated, while diffusion of the drag is prevented by the duct portion, thus reducing pressure difference between both surface sides at the rear end of the baffle plate portion. In addition, surface rigidity of the baffle plate portion is supplemented with rigidity of the duct portion, thus the baffle plate portion is enabled to have high rigidity and strength.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a vehicle deflector mounted on a bonnet.

Some automobiles (vehicles) are equipped with a deflector on the upper surface of a hood that covers an engine room in order to prevent foreign objects from moving toward the front wind panel.
The deflector has a structure with a wind guide plate that is inclined in a direction away from the bonnet as it goes rearward of the vehicle. The deflector pushes the traveling wind upward and flows it upward from the front wind panel. Protect wind panels.

In order to sufficiently secure such a protection function, it is desirable to extend the front and rear length of the air guide plate portion to earn an amount away from the bonnet.
However, in the wind guide plate portion having a large longitudinal length, the turbulence of the traveling wind at the rear end of the wind guide plate portion increases, and negative pressure tends to be generated at the rear end of the wind guide plate portion. For this reason, there exists a problem that the rear-end part of a baffle plate part will generate | occur | produce a vibration by a pressure difference.

  In view of this, a technique has been proposed in which a wind guide opening is provided in the wind guide plate and a part of the traveling wind is guided into the deflector (see Patent Document 1).

Japanese Utility Model Publication No. 60-84356

  However, although the structure in which the air guide opening is simply provided is effective for the air guide plate portion having a short front and rear length, if the air guide plate portion has a long front and rear length, the traveling air is diffused immediately after passing through the air guide opening. Therefore, it is not enough to eliminate the pressure difference. Moreover, since the rigidity strength of the air guide plate portion is reduced due to the formation of the opening, the vibration of the air guide plate portion due to the pressure difference is unavoidable, and the vibration cannot be solved.

  SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle deflector that can suppress the generation of negative pressure at the rear end of a wind guide plate portion while ensuring the rigidity strength of the wind guide plate portion.

  An aspect of the present invention is arranged on the upper surface of a hood of a vehicle and is provided in the wind guide plate portion that is inclined in a direction away from the hood as it goes rearward of the vehicle, and guides part of the traveling wind. A deflector for a vehicle having a wind guide opening that leads to a rear surface side of the wind plate portion, and an opening edge of the wind guide opening has a traveling wind flowing in from the wind guide opening at a vehicle rearward end of the wind guide plate portion. It was assumed that a duct portion to be led directly below was formed.

  According to the present invention, the traveling wind flowing from the wind guide opening of the wind guide plate portion is guided by the duct portion directly below the rear end of the wind guide plate portion where the negative pressure is generated. Running wind is supplied directly below the rear end while suppressing diffusion. For this reason, the pressure difference between the rear end sides of the air guide plate portion is improved, and the generation of negative pressure in the region immediately below the same is suppressed. Moreover, since the surface rigidity of the wind guide plate portion having the wind guide opening is supplemented by the rigidity strength of the duct portion, the rigidity strength of the wind guide plate portion is ensured, and the wind guide plate portion is caused by the formation of the wind guide opening. Generation of vibration is suppressed.

  Therefore, the deflector can suppress the generation of negative pressure at the rear end of the wind guide plate portion while ensuring the rigidity strength of the wind guide plate portion.

The perspective view which shows the deflector of the 1st Embodiment of this invention. Sectional drawing which follows the AA line in FIG. The perspective view which shows the different deflector used as the principal part of the 2nd Embodiment of this invention. The perspective view which expands and shows the B section in FIG. Sectional drawing which follows the CC line | wire in FIG.

Hereinafter, the present invention will be described based on the first embodiment shown in FIG. 1 and FIG.
FIG. 1 shows a front part of an automobile (vehicle), in which 1 is a vehicle body, 3 is a bonnet that covers an upper opening of an engine room (not shown) at the front part of the vehicle body 1, and 5 is the bonnet 3 A front window panel disposed at the rear of the hood, 7 is a front grille portion connected to the front end portion of the bonnet 3, and 9 is a front fender panel disposed on both sides of the bonnet 3 in the vehicle width direction.

A deflector 11 made of, for example, a synthetic resin is provided on the upper surface of the bonnet 3, for example, the upper surface of the front end portion (end portion on the front side in the vehicle front-rear direction). The deflector 11 is formed to have a wind guide plate portion 13 that tilts backward, that is, tilts toward the rear end side of the bonnet 3.
Specifically, the air guide plate portion 13 includes a front wall portion 15 inclined in a direction away from the upper surface of the bonnet 3 while drawing an arc from the front end of the bonnet 3 toward the rear of the vehicle, and a vehicle width of the front wall portion 15. It is formed of a three-dimensional object having a pair of side wall portions 17 extending downward from both sides in the direction. And it arrange | positions so that the front-end part of the front wall part 15 may be continued with the front end of the bonnet 3, and the lower end part of the side wall part 17 may be continued with the side end (vehicle width direction) of the bonnet 3.

The air guide plate portion 13 has a long front and rear length that occupies, for example, 1/5 to 1/4 of the front and rear length of the bonnet 3, and earns a separation amount from the upper surface of the bonnet 3 while suppressing air resistance. By this wind guide plate portion 13, the traveling wind α is pushed upward and received upward from the front wind panel 5 to protect the front wind panel 5 from foreign matters contained in the traveling wind α.
The front wall portion 15 of the wind guide plate portion 13 is provided with wind guide openings 21 at a plurality of points in the vehicle width direction, for example, four points. Each of the air guide openings 21 is formed so as to extend in the vehicle front-rear direction at a point near the rear end of the front wall portion 15, and the rear end is configured to be positioned in the vicinity of the rear end portion of the front wall portion 15. Yes. The air guide opening 21 is formed in a triangular shape having a front end as a top portion and a rear end as a bottom portion, and the width dimension is increased toward the rear of the vehicle. Due to the air guide opening 21, a part of the traveling air α flows into the back surface side of the air guide plate portion 13.

  A duct portion 25 extending rearward is formed at the opening edge of each air guide opening 21. For example, as shown in FIG. 2, the duct portion 25 includes a concave groove portion 27 in which a lead-out port 33 is formed at the rear end. Specifically, the groove 27 includes a triangular side wall 29 projecting downward from the side edge on both sides of the air guide opening 21 with the front end edge of the air guide opening 21 as a top, and the side wall 29 extending from the front edge of the air guide opening 21. And a bottom wall 31 that extends rearward while closing the lower end portion of the rear end, and the rear end is opened at the outlet port 33. The duct portion 25 provided along the opening edge of the air guide opening 21, that is, the upper portion opens to the air guide opening 21, and the rear end opens to the groove portion 27 that opens directly below the rear end of the front wall portion 15. The driving wind α that has flowed in from the vehicle is guided to the outlet 33 formed at the rear end, and is directly guided directly below the rear end of the front wall portion 15 (wind guide plate portion 13) where negative pressure is easily generated. It has become.

  Further, the front wall portion 15 (the wind guide plate portion 13) is reinforced by the groove portion 27 so that the rigidity of the opening edge of the wind guide opening 21 and the periphery thereof is reinforced. The surface rigidity of the portion 15 is supplemented. Further, utilizing the structure for ensuring the rigidity, the front portion of the deflector 11 is fixed to the bonnet 3 via a front bracket 35 (corresponding to the bracket of the present application). Specifically, the front bracket 35 is connected to one end portion, for example, as shown in FIG. 2, at a position near each air guide opening 21, for example, near a front end portion that forms the top of the air guide opening 21, for example, It is formed of a band-shaped member having a fixed end portion 35a fixed by a bolt member 34 and having a groove-shaped locking portion 35b fitted and connected to the tip end of the bonnet 3 at the other end portion. In other words. The front part of the deflector 11 is firmly connected to the end of the bonnet 3 by utilizing the surface rigidity of the front wall part 15 secured by the groove part 27. Incidentally, although only a part of the front bracket 35 is shown in FIG. 1, the other parts near the air guide openings 21 are similarly fixed by the front bracket 35.

As shown in FIG. 1, the side wall portion 17 of the deflector 11 is connected to the side end of the bonnet 3 using a side bracket 37 having a structure similar to that of the front bracket 35, and the deflector 11 is connected to the front bracket 35 together with the front bracket 35. It is attached to the bonnet 3.
With such a structure, the running wind α can be pushed upward while suppressing the occurrence of vibration even in the deflector 11 having a considerably long front and rear.

Next, the action of the deflector 11 during traveling will be described. As shown in FIGS. 1 and 2, the traveling wind α is pushed upward along the upper surface of the front wall portion 15 having a long front and rear length. Then, it flows upward of the front wind panel 5.
As a result, the foreign matter contained in the traveling wind α does not need to reach the front window panel 5.
At this time, negative pressure is generated at the rear end portion of the front wall portion 15, and a pressure difference is generated between the upper surface side and the back surface side of the front wall portion 15, and vibration is generated. In particular, when the longitudinal length of the deflector 11 is increased, the rear end portion of the front wall portion 15 is reduced in surface rigidity, so that vibration tends to increase.

  On the other hand, in this embodiment, each part of the front wall part 15 is provided with a triangular air guide opening 21 and a groove part 27 (duct part 25) extending to the vicinity of the rear end part of the front wall part 15. . As a result, part of the traveling wind α flows in from each air guide opening 21 and is guided directly below the rear end of the front wall portion 15 by the groove portion 27 (duct portion 25) while suppressing diffusion. As a result, the traveling wind α is maintained in a region where a negative pressure indicated by β in FIG. 2 is generated from the outlet 33, that is, the front wall portion 15 (the wind guide plate portion 13) while the positive pressure is sufficiently maintained. ) Is supplied to the region immediately below the rear end.

Then, since the generation of negative pressure in the region β immediately below the rear end of the front wall portion 15 (wind guide plate portion 13) is suppressed, the upper surface side and the back surface of the rear end portion of the front wall portion 15 (wind guide plate portion 13). The pressure difference on the side is improved.
In addition, the surface rigidity in the vicinity of the wind guide opening 21 including the wind guide opening 21 is compensated by the rigidity strength of the groove 27 (duct part 25). In addition, since the groove portion 27 is extended to the vicinity of the rear end portion of the front wall portion 15 together with the air guide opening 21, the rigidity of the rear end portion of the front wall portion 15 where the surface rigidity is reduced can be improved. The rigidity strength of the wall portion 15 (the air guide plate portion 13) is efficiently ensured. Thereby, the generation | occurrence | production of the vibration of the front wall part 15 (wind guide plate part 13) of the deflector 11 resulting from formation of the wind guide opening 21 is suppressed.

  Therefore, the deflector 11 of the present embodiment has the duct portion 25, that is, the air guide opening 21 and the groove portion 27 provided at the opening edge thereof, while ensuring the rigidity strength of the air guide plate portion 13, and the rear of the air guide plate portion 13. Generation of negative pressure at the end can be suppressed. In particular, by using the groove portion 27 (the duct portion 25), it is possible to guide the traveling wind α directly below the rear end of the front wall portion 15 (the air guide plate portion 13) while effectively ensuring the rigidity and strength. .

Moreover, since the groove portion 27 is connected to the end of the bonnet 3 by the front bracket 35 using the rigidity strength secured in the groove portion 27 (duct portion 25), a member or structure that ensures rigidity strength is not used separately. In addition, the deflector 11 can be fixed and the deflector 11 can be easily installed.
3 to 5 show a second embodiment of the present invention.

  This embodiment is a modification of the first embodiment, and the air guide opening 41 is not a triangular opening, but is formed in a slit shape extending in the vehicle front-rear direction shown in FIGS. 4 and a frame-shaped flange portion 43 erected on the back side of the front wall portion 15 so as to surround the opening edge of the air guide opening 41 (slit) shown in FIG. Equivalent to the wall portion). Particularly, in the flange portion 43, the flange portion 43a formed at the front end portion of the air guide opening 41 (slit) is inclined at an angle close to horizontal, and cooperates with other flange portions to form the flange portion 43. Thus, the traveling wind α can be guided directly under the rear end (back side) of the front wall portion 15 while ensuring rigidity.

Such a duct portion 25 also has the same effect as that of the first embodiment. However, in FIG. 3 to FIG. 5, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.
It should be noted that each configuration and combination in each embodiment described above is an example, and it is needless to say that additions, omissions, substitutions, and other modifications of the configuration can be made without departing from the spirit of the present invention. Nor. Further, the present invention is not limited by the embodiment, and it is needless to say that the present invention is limited only by the “claims”. For example, in the above-described embodiments, the air guide opening has a triangular shape or a slit shape, or the duct portion has a groove shape or a frame shape. However, the present invention is not limited thereto, and other shapes and structures may be used. . In the above-described embodiment, the example in which the deflector is arranged on the front end side of the bonnet has been described.

3 Bonnet 11 Deflector 13 Air guide plate part 21, 41 Air guide opening 27 Concave groove part (duct part)
35 Front bracket (bracket)
43 Frame-shaped flange (duct)

Claims (4)

A wind guide plate portion disposed on the upper surface of the hood of the vehicle and inclined in a direction away from the hood as it goes rearward of the vehicle, and provided on the wind guide plate portion, and a part of the traveling wind is transferred to the back surface of the wind guide plate portion. A vehicle deflector having a wind guide opening to the side,
A vehicle deflector characterized in that a duct portion is formed at the opening edge of the wind guide opening to guide the traveling wind flowing in from the wind guide opening directly below the rear end of the wind guide plate in the vehicle. .   2. The vehicle deflector according to claim 1, wherein the duct portion is a groove portion provided along an opening edge of the air guide opening and having a rear end opened.   2. The vehicle deflector according to claim 1, wherein the duct portion is a frame-shaped wall portion erected along an opening edge of the air guide opening. The wind guide plate portion is fixed to the bonnet via a bracket,
5. The vehicle deflector according to claim 1, wherein one end portion of the bracket is connected to a position in the vicinity of a front end portion of the air guide opening.

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