JP2013010441A - Vehicle body structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle body structure with which aerodynamic performance is improved by suppressing the turbulence caused at the rear side of a tire storing part.SOLUTION: The vehicle body structure 1 includes a vehicle body 101, the tire storing part 105, and a plurality of ribs 3 protruded in the lower side direction of the vehicle body 101 and formed at a position in the rear side direction of the tire storing part 105. In at least two out of the plurality of ribs 3, ends in a front direction are arranged adjacently to a rear side end 105a in the rear side direction of the tire storing part 105, and extended in the front side direction and in the rear side direction of the vehicle body 101.

Description

  The present invention relates to a vehicle body structure having a rectifying rib formed at a position opposite to a direction in which the vehicle body moves in a vehicle body having a tire and a tire storage portion for storing the tire. For example, the present invention relates to a vehicle body structure having a rib provided at a lower portion of a vehicle body such as an automobile.

  Patent Document 1 discloses a technique in which a downforce generating means that is a member that controls the flow of air is provided in a lower part of a vehicle body.

  Patent Document 2 discloses a technique in which a rectifying plate for controlling the flow of air is provided at the lower part of the vehicle body.

  Patent Document 3 discloses a technique in which an air guide is provided in the lower part of the vehicle body to suppress an airflow flowing from the lower side surface of the vehicle body to the floor, and to actively discharge the airflow under the floor to the lower surface of the vehicle body.

JP 2009-248746 A JP 2006-248355 A JP 2007-62681 A

  However, none is for suppressing turbulent flow caused by the presence of the tire storage portion.

  An example of an object of the present invention is to provide a vehicle body structure capable of suppressing a turbulent flow generated on the rear side of a tire storage portion and improving aerodynamic performance.

  The vehicle body structure of the present invention includes a vehicle body, a tire storage portion, and a plurality of ribs protruding in a lower direction of the vehicle body and formed at positions in the rear side direction of the tire storage portion. At least two of the rear end portions in the front direction are disposed adjacent to the end portions in the rear direction of the tire storage portion, and extend in the front direction and the rear direction of the vehicle body.

  Preferably, among the plurality of ribs, the rib disposed at the outermost position of the vehicle body is formed to have the longest length in the lowermost direction.

  Preferably, the rib disposed at the innermost position of the vehicle body is formed to have a longest length in the lowermost direction.

  Preferably, among the plurality of ribs, the rib disposed at the outermost position of the vehicle body and the rib disposed at the innermost position of the vehicle body are in a lower side direction than the other ribs. The length of is formed long.

  Preferably, the plurality of ribs are inclined toward the outer side of the vehicle body so as to guide air toward the outer side of the vehicle body.

  Preferably, the plurality of ribs are inclined toward the outer side of the vehicle body so as to guide air toward the inner side of the vehicle body.

  Preferably, the plurality of ribs have rear portions inclined toward the outer side of the vehicle body so as to guide air toward the outer side of the vehicle body.

  Preferably, the plurality of ribs are inclined toward the inner side of the vehicle body so that air is guided toward the inner side of the vehicle body.

  Preferably, the plurality of ribs include a high-strength rib formed with high strength, a low-strength rib formed with low strength, an end side position in a lower direction of the high-strength rib, and the low strength. And a link member that connects the end side position in the lower side direction of the rib.

  With the vehicle body structure according to the present invention, it is possible to provide a vehicle body structure that can suppress a turbulent flow generated on the rear side of the tire storage portion and improve aerodynamic performance.

It is explanatory drawing of the vehicle body structure in the 1st Embodiment of this invention. It is explanatory drawing which looked at the rib from the tire storage part side (front side direction). It is explanatory drawing of the vehicle body structure in the 2nd Embodiment of this invention. It is explanatory drawing of 3rd Embodiment. It is explanatory drawing of 4th Embodiment. It is explanatory drawing of 5th Embodiment. It is explanatory drawing of 6th Embodiment. It is explanatory drawing of 7th Embodiment. It is explanatory drawing of 8th Embodiment. It is explanatory drawing of 9th Embodiment.

<First Embodiment>
FIG. 1 is an explanatory diagram of a vehicle body structure 1 in the first embodiment of the present invention.

Hereinafter, the vehicle body structure 1 in the 1st Embodiment of this invention is demonstrated in detail using FIG.
As shown in FIG. 1, the vehicle body structure 1 of an automobile is normally designed and manufactured so as to move in the front direction. In the vehicle body 101 of the automobile, a tire 103 is disposed at a lower position of the vehicle body.
A tire storage portion 105 for storing the tire 103 is provided.
Even when the tire storage portion 105 is in a state in which the tire 103 is stored, a gap exists between the tire storage portion 105 and the tire 103, so that the inside thereof has a hollow structure.
Further, since the tire storage portion 105 stores the tire 103 which is its function, it is extremely difficult to smoothly change the shape of the cavity like the shape of the vehicle body 101. That is, it is difficult to make the connection shape with the shape of the vehicle body side surface 101a or the vehicle body bottom surface 101b smooth so as not to generate the turbulent flow R aerodynamically.
For these two reasons, there arises a problem that a turbulent flow R is generated at the rear position of the tire storage unit 105.
Since this turbulent flow R increases aerodynamic resistance and generates noise, it is required to suppress the generation of the turbulent flow R as much as possible.
Furthermore, when the turbulent flow R has occurred, it is required to make the space in which the turbulent flow R is generated as small as possible. That is, it is required to converge the generated vortex early.
The object of the present embodiment is to improve fuel consumption, reduce noise, and the like by suppressing the generation of turbulent flow R and reducing the turbulent flow generation space.

In the present embodiment, in order to achieve this object, a plurality of ribs 3 are provided in the rear surface position of the tire storage portion 105 in the vehicle body bottom surface 101 b of the vehicle body 101.
That is, the plurality of ribs 3 suppress the generation of turbulent flow R, and the generated turbulent flow R converges early.

Here, the direction is defined. The front direction refers to a direction in which the vehicle body 101 is assumed to move normally. The direction opposite to the front direction is referred to as the rear direction.
Further, in the vehicle body 101, the right-hand side in the front direction is referred to as the right direction, and the direction opposite to the right direction is referred to as the left direction. Of these left and right directions, the direction on the central axis side of the vehicle body 101 is defined as the inner direction, and conversely, the direction away from the central axis is defined as the outer direction.
Further, when the vehicle body is normally used, the ground side of the vehicle body 101 is referred to as a lower direction, and the opposite is referred to as an upper direction.

  FIG. 2 is an explanatory view of the rib 3 as seen from the tire storage portion 105 side (front side direction).

As shown in FIG. 2, the rib 3 is formed of four ribs. However, the number of ribs 3 is not limited to these four. Any number may be used as long as the number is two or more.
The reason why the number of the ribs 3 is not one is that when one is positively creating a flow, the rib 3 may function properly, but for the purpose of suppressing the turbulent flow R as in the present embodiment. This is because when it is used, it is difficult to exert its function sufficiently.
The plurality of ribs 3 are referred to as a first rib 3a, a second rib 3b, a third rib 3c, and a fourth rib 3d from the outside direction.

As shown in FIG. 2, the rib 3 has a certain length (height) in the downward direction from the bottom surface 101 b of the vehicle body 101.
In the first embodiment, the lengths (heights) of the plurality of ribs 3 (the first rib 3a, the second rib 3b, the third rib 3c, and the fourth rib 3d) are the same.
The plurality of ribs 3 (the first rib 3a, the second rib 3b, the third rib 3c, and the fourth rib 3d) have the same left side length and right side length (width). Yes.
Further, as will be described later, the plurality of ribs 3 (the first rib 3a, the second rib 3b, the third rib 3c, and the fourth rib 3d) have the same length in the front direction and the rear direction (depth). )have.

  These ribs 3 can be made of metal, or can be made of resin, rubber or the like. Further, it is not necessary that all the plurality of ribs 3 have the same material and shape, and only an arbitrary number of the plurality of ribs 3 may be formed with a specific material and shape.

<Second Embodiment>
FIG. 3 is an explanatory diagram of the vehicle body structure 1 in the second embodiment of the present invention.

As shown in FIG. 3, the first rib 3a is formed to have a longer length in the lower direction than the other ribs 3 (the second rib 3b, the third rib 3c, and the fourth rib 3d). .
In this way, by forming the first rib 3a, which is a rib in the outer direction, long, it is possible to more efficiently suppress the turbulent flow R on the vehicle body side surface 101a side where most of the turbulent flow R is generated. It becomes.
Here, since the length (height) in the downward direction of the plurality of ribs 3 is essentially as long as possible, the effect of suppressing the turbulent flow R is high, so that not only the first rib 3a but also other ribs 3 are used. Longer is more appropriate.
However, if all the ribs 3 are formed long, the material cost of the ribs 3 may increase, and the ribs 3 may be worn out.
Therefore, in the present embodiment, only the first rib 3a existing at the outermost position is formed long in the downward direction to suppress the rise in material cost and the complexity of the shape, while suppressing the turbulent flow R. We are trying to suppress it.

<Third Embodiment>
FIG. 4 is an explanatory diagram of the third embodiment.

As shown in FIG. 4, only the fourth rib 3d may be formed long.
Also in this case, since the fourth rib 3d is longer than the other ribs 3, it is possible to further suppress the turbulent flow R generated on the vehicle body bottom surface 101b side where the fourth rib 3d exists.
Further, only the fourth rib 3d existing at the innermost position is formed long in the downward direction, and the turbulence R is suppressed while suppressing the increase in material cost and the complexity of the shape. .

<Fourth Embodiment>
FIG. 5 is an explanatory diagram of the fourth embodiment.

As shown in FIG. 5, the first rib 3a and the fourth rib 3d may be formed long.
With this configuration, it is possible to suppress the turbulent flow R on both the vehicle body side surface 101a and the vehicle body bottom surface 101b while suppressing an increase in material cost and a complicated shape.
<Fifth Embodiment>
FIG. 6 is an explanatory diagram of the fifth embodiment.

As shown in FIG. 6, the plurality of ribs 3 extend from the rear end portion 105 a of the tire storage unit 105 toward the rear side of the vehicle body 101.
The plurality of ribs 3 are inclined toward the inner side of the vehicle body 101 so as to guide air toward the inner side of the vehicle body.
That is, the position of the rear portion 15 of the rib 3 is located at a position inward of the front portion 13 of the rib 3.
As described above, since the plurality of ribs 3 are inclined toward the inner side of the vehicle body 101, the generation of the turbulent flow R on the vehicle body bottom surface 101b caused by the tire storage portion 105 can be further suppressed.
<Sixth Embodiment>
FIG. 7 is an explanatory diagram of the sixth embodiment.

As shown in FIG. 7, the plurality of ribs 3 extend from the rear end portion 105 a of the tire storage portion 105 toward the rear side of the vehicle body 101.
The plurality of ribs 3 are inclined toward the outer side of the vehicle body 101 so as to guide air toward the outer side of the vehicle body.
That is, the position of the rear portion 15 of the rib 3 is located at a position outside the front portion 13 of the rib 3.
As described above, since the plurality of ribs 3 are inclined toward the outer side of the vehicle body 101, it is possible to suppress the occurrence of the turbulent flow R on the vehicle body side surface 101a caused by the tire storage portion 105.
<Seventh Embodiment>
FIG. 8 is an explanatory diagram of the seventh embodiment.

As shown in FIG. 8, the plurality of ribs 3 extend from the rear end portion 105 a of the tire storage unit 105 toward the rear side of the vehicle body 101.
Only the rear portions 15 of the plurality of ribs 3 are inclined toward the inner side of the vehicle body 101 so as to guide air toward the inner side of the vehicle body.
As described above, since only the rear portions 15 of the plurality of ribs 3 are inclined toward the inner side of the vehicle body 101, it is possible to suppress the generation of the turbulent flow R on the vehicle bottom surface 101b caused by the tire storage unit 105. Become.
Thus, since the front portion 13 of the rib 3 is not inclined, but only the rear portion 15 is inclined, the following effects are obtained.
First, in the front part 13 which is not inclined, the turbulent flow R generated from the rear end part 105a of the tire storage part 105 can be more reliably prevented. In addition, since the air flows in the rear direction at the rear portion 15, it is possible to suppress the occurrence of turbulent flow R generated on the bottom surface 101b of the vehicle body.
<Eighth Embodiment>
FIG. 9 is an explanatory diagram of the eighth embodiment.

As shown in FIG. 9, the plurality of ribs 3 extend from the rear end portion 105 a of the tire storage unit 105 toward the rear side of the vehicle body 101.
Only the rear portions 15 of the plurality of ribs 3 are inclined toward the outer side of the vehicle body 101 so as to guide air toward the inner side of the vehicle body.
As described above, since only the rear portions 15 of the plurality of ribs 3 are inclined toward the outer side of the vehicle body 101, it is possible to suppress the occurrence of the turbulent flow R on the vehicle bottom surface 101b caused by the tire storage unit 105. Become.
Thus, since the front portion 13 of the rib 3 is not inclined, but only the rear portion 15 is inclined, the following effects are obtained.
First, in the front part 13 which is not inclined, the turbulent flow R generated from the rear end part 105a of the tire storage part 105 can be more reliably prevented. In addition, since air flows in the rear portion 15 in the inward direction, it is possible to suppress the occurrence of turbulent flow R generated on the vehicle body side surface 101a.

As described above, a plurality of embodiments have been described regarding the inclination of the plurality of ribs 3, but the inclination of the ribs 3 is not limited to this. For example, the outer side rib 3 (first rib 3a and second rib 3b) is inclined outward, and the inner side rib 3 (third rib 3c and fourth rib 3d) is It may be inclined inward.
Furthermore, you may have a more complicated inclination.
<Ninth Embodiment>
FIG. 10 is an explanatory diagram of the ninth embodiment.

In the present embodiment, the reason for providing the rib 3 is to rectify the turbulent flow R. Therefore, if this is possible, the shape of the rib 3 may not be the same.
In particular, since it is sufficient that the rib 3 does not vibrate due to the turbulent flow R, the following ninth embodiment may be used.
Specifically, as shown in FIG. 10, among the plurality of ribs 3, only the first rib 3 a positioned in the outermost direction is formed with a high-strength rib 3 e having high strength, and the other ribs 3 are formed with low strength. It is formed by the low strength rib 3f.
Furthermore, since the low strength rib 3f may be vibrated by the turbulent flow R, the link member 17 connects the low strength rib 3f and the high strength rib 3e to prevent this.
The link member 17 is preferably connected on the lower end side of the rib 3, but is not limited thereto. Moreover, the link member 17 may be provided also in the rear direction position of the rib 3. Furthermore, the link member 17 is not necessarily constituted by a bolt, and may be a plastic rod-like shape (plate shape).
As described above, since the link member 17 is provided, it is possible to reduce the weight of the low-strength rib 3f while preventing the vibration of the low-strength rib 3f.

Further, the present invention is not limited to the above embodiment, and various changed structures, configurations, and controls may be performed.
For example, in the above-described embodiment, the front tire 103 (front wheel) of the vehicle body 101 is provided, but the rear tire 103 (rear wheel) may be provided.
Moreover, the height of the rib 3 may be configured to decrease as it goes in the rearward direction, or may have another shape.
The thickness of the rib 3 may also be thin at the end portion on the front direction side, thicker as it goes in the rear direction, and further thin at the end portion on the rear direction side. That is, the thickness of the rib 3 may be a streamline shape. Furthermore, other shapes may be used.

<Configuration and Effect of Embodiment>
According to the above embodiment, the vehicle body structure 1 includes the vehicle body 101, the tire storage portion 105, and the plurality of ribs 3 that protrude in the lower direction of the vehicle body 101 and are formed at positions in the rearward direction of the tire storage portion 105. And at least two or more of the plurality of ribs 3 are arranged such that the front end portion is disposed adjacent to the rear end portion 105a in the rear direction of the tire storage portion 105, and the front direction of the vehicle body 101 is And it extends in the rear direction.
With such a configuration, the vehicle body structure 1 of the present embodiment can rectify the turbulent flow generated by the tire storage unit 105 by the plurality of ribs 3.
Since rectification can be performed in this manner, aerodynamic performance is improved, and effects such as improvement in fuel consumption and reduction in noise occur.

Of the plurality of ribs 3, the first rib 3 a disposed at the outermost position of the vehicle body 101 is formed to have the longest length in the lowermost direction.
Since it has such a structure, it becomes possible to increase a rectification effect more.

The fourth rib 3d disposed at the innermost position of the vehicle body 101 is formed to have the longest length in the lower side direction.
Since it has such a structure, it becomes possible to increase a rectification effect more.

Among the plurality of ribs 3, the first rib 3 a disposed at the outermost position of the vehicle body 101 and the fourth rib 3 d disposed at the innermost position of the vehicle body 101 are the other ribs 3. The second rib 3b and the third rib 3c are formed to have longer lengths in the lower direction.
Since it has such a structure, it becomes possible to increase a rectification effect more.

The plurality of ribs 3 are inclined toward the outer side of the vehicle body 101 so as to guide air toward the outer side of the vehicle body 101.
Since it has such a structure, it becomes possible to increase a rectification effect more.

The plurality of ribs 3 are inclined toward the outer side of the vehicle body 101 so as to guide air toward the inner side of the vehicle body 101.
Since it has such a structure, it becomes possible to increase a rectification effect more.

The plurality of ribs 3 have rear portions 15 inclined toward the outer side of the vehicle body 101 so as to guide air toward the outer side of the vehicle body 101.
Since it has such a structure, it becomes possible to increase a rectification effect more.

The plurality of ribs 3 have rear portions 15 inclined toward the inner side of the vehicle body so as to guide air toward the inner side of the vehicle body 101.
Since it has such a structure, it becomes possible to increase a rectification effect more.

The plurality of ribs 3 include a high-strength rib 3e formed with high strength, a low-strength rib 3f formed with low strength, an end side position in a lower direction of the high-strength rib 3e, and a low-strength rib 3f. And a link member 17 that connects the end portion side position in the lower direction.
Since it has such a structure, it becomes possible to form the rib 3 which can maintain intensity | strength, reducing a weight.

DESCRIPTION OF SYMBOLS 1 Vehicle body structure 3 Rib 3a 1st rib 3b 2nd rib 3c 3rd rib 3d 4th rib 3e High strength rib 3f Low strength rib 13 Front part 15 Rear part 17 Link member 101 Car body 101a Car body side surface 101b Car body bottom face 103 Tire 105 Tire storage part 105a Side edge R Turbulence

The vehicle body structure of the present invention includes a vehicle body, a tire storage portion, and a plurality of ribs that project in a lower direction of the vehicle body and are formed at positions on the rear side of the tire storage portion. At least two of the rear end portions in the front direction are disposed adjacent to the rear end portion of the tire storage portion , and extend in the front direction and the rear direction of the vehicle body.

<Configuration and Effect of Embodiment>
According to the above embodiment, the vehicle body structure 1 includes the vehicle body 101, the tire storage portion 105, and the plurality of ribs 3 protruding in the lower direction of the vehicle body 101 and formed at the rear side position of the tire storage portion 105. , And at least two or more of the plurality of ribs 3 are arranged such that an end in the front side direction is adjacent to the rear end 105a of the tire storage unit 105 , and in the front side direction and the rear side direction of the vehicle body 101. It is growing.
With such a configuration, the vehicle body structure 1 of the present embodiment can rectify the turbulent flow generated by the tire storage unit 105 by the plurality of ribs 3.
Since rectification can be performed in this manner, aerodynamic performance is improved, and effects such as improvement in fuel consumption and reduction in noise occur.

Claims (9)

The car body,
Tire storage,
A plurality of ribs protruding in the lower direction of the vehicle body and formed at positions in the rear direction of the tire storage portion,
At least two of the plurality of ribs are
An end in the front direction is disposed adjacent to a rear end in the rear direction of the tire storage portion,
A vehicle body structure extending in a front direction and a rear direction of the vehicle body. The vehicle body structure according to claim 1, wherein, among the plurality of ribs, the rib disposed at the outermost position of the vehicle body is formed to have a longest length in the lowermost direction. The vehicle body structure according to claim 1, wherein the rib disposed at the innermost position of the vehicle body is formed to have a longest length in a lowermost direction. Of the plurality of ribs, the rib disposed at the outermost position of the vehicle body and the rib disposed at the innermost position of the vehicle body have a length in a lower side direction than the other ribs. The vehicle body structure according to claim 1, wherein the vehicle body structure is long. The vehicle body structure according to any one of claims 1 to 4, wherein the plurality of ribs are inclined toward an outside direction of the vehicle body so as to guide air to an outside direction of the vehicle body. The vehicle body structure according to any one of claims 1 to 4, wherein the plurality of ribs are inclined toward an outer side of the vehicle body so as to guide air toward an inner side of the vehicle body. The vehicle body structure according to any one of claims 1 to 4, wherein the plurality of ribs have a rear side inclined toward the outer side of the vehicle body so as to guide air toward the outer side of the vehicle body. The vehicle body structure according to any one of claims 1 to 4, wherein rear portions of the plurality of ribs are inclined toward an inner side of the vehicle body so as to guide air toward an inner side of the vehicle body. The plurality of ribs are
High-strength ribs formed with high strength;
Low strength ribs formed with low strength,
The vehicle body structure according to claim 1, further comprising: a link member that connects an end side position in the lower direction of the high-strength rib and an end side position in the lower direction of the low-strength rib.

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