JP2013159205A - Vehicle fairing structure - Google Patents

Vehicle fairing structure Download PDF

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JP2013159205A
JP2013159205A JP2012022043A JP2012022043A JP2013159205A JP 2013159205 A JP2013159205 A JP 2013159205A JP 2012022043 A JP2012022043 A JP 2012022043A JP 2012022043 A JP2012022043 A JP 2012022043A JP 2013159205 A JP2013159205 A JP 2013159205A
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vehicle
fairing
vehicle body
fixed
cover
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Tsunehisa Nagayoshi
恒久 永吉
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Mitsubishi Motors Corp
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Mitsubishi Motors Corp
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/88—Optimized components or subsystems, e.g. lighting, actively controlled glasses

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Abstract

PROBLEM TO BE SOLVED: To provide a vehicle fairing structure in which generation of vibration of a fairing cover can be suppressed without increasing a spot to be fixed to a bottom face of a vehicle body.SOLUTION: Both sides of a fairing cover 15 in a vehicle width direction in end portions at a front side of a vehicle are fixed to a bottom face of a vehicle body 1 by fixing means 19, 20, a protrusion 25 is provided on one of the bottom face of the vehicle body and a top face of an end portion 16 of the fairing cover, which are overlapped at least between fixing points (a) and (b) at both sides in the vehicle width direction to be fixed by the fixing means, and the protrusion 25 is held between bottom faces 3, 11 of the vehicle body and the top face 16 of the end portion of the fairing cover through fixture by the fixing means, thereby suppressing the end portion at the front side of the vehicle at a central side in the vehicle width direction. In the similar configuration, both sides of the fairing cover in the vehicle width direction in the end portion at the front side of the vehicle are fixed to the bottom face of the vehicle body by the fixing means, and the central side in the vehicle width direction is prevented from moving by the protrusion, thereby suppressing generation of vibration of the fairing cover caused by an air flow α under the vehicle body without increasing the spot to be fixed.

Description

本発明は、車体下を流れる気流が、車体下面から突き出た搭載物に衝突するのを防ぐ車両のフェアリング構造に関する。   The present invention relates to a vehicle fairing structure that prevents an airflow flowing under a vehicle body from colliding with a load projecting from the lower surface of the vehicle body.

自動車（車両）の床下には、燃料タンクなどの床下の構造物が据え付けられている。通常、燃料タンクなど床下構造物は、車体の下面、具体的には床面から下方へ突き出ている。このため、燃料タンクなど構造物は、床下（車体下）を流れる気流と衝突しやすく、自動車の空気抵抗を増大させる要因となっている。
そこで、近時、自動車のリヤ側の床下には、燃料タンクと気流との衝突を避けるフェアリング構造が設けられる。多くは、床下に据付けられている燃料タンクの車体前側に、気流の衝突を避けるフェアリングカバーを設ける構造が用いられる（例えば特許文献１の図１３中の符号１５を参照）。 Under the floor of an automobile (vehicle), a structure under the floor such as a fuel tank is installed. Usually, an underfloor structure such as a fuel tank protrudes downward from the lower surface of the vehicle body, specifically from the floor surface. For this reason, a structure such as a fuel tank easily collides with an airflow flowing under the floor (under the vehicle body), which is a factor that increases the air resistance of the automobile.
Therefore, recently, a fairing structure that avoids collision between the fuel tank and the airflow is provided under the floor on the rear side of the automobile. In many cases, a structure in which a fairing cover that avoids collision of airflow is provided on the front side of the vehicle body of a fuel tank installed under the floor (see, for example, reference numeral 15 in FIG. 13 of Patent Document 1).

同フェアリングカバーは、一般に車両前側の端部を床部分に固定し、車両後側の端部を燃料タンクの下面へ延ばし、両端部間を下方へ傾斜させた構造が用いられる。このフェアリングカバーにより、床下（車体下）を流れる気流は、燃料タンク（構造物）の下面へ導かれ、当該床下の気流が、床下から突き出ている燃料タンクの下部と衝突せずに円滑に流れるようにしている。つまり、フェアリングカバーにより、空気抵抗が改善される。むろん、フェアリングカバーは、走行中に路面から跳ねる石など（跳ね物体）が燃料タンクに当たるのを防ぐ役割も果たす。   The fairing cover generally has a structure in which an end portion on the front side of the vehicle is fixed to a floor portion, an end portion on the rear side of the vehicle extends to the lower surface of the fuel tank, and the end portions are inclined downward. With this fairing cover, the airflow flowing under the floor (under the vehicle body) is guided to the lower surface of the fuel tank (structure), and the airflow under the floor does not collide with the lower part of the fuel tank protruding from the underfloor and smoothly It is made to flow. That is, the air resistance is improved by the fairing cover. Of course, the fairing cover also serves to prevent stones and the like (bouncing objects) that bounce off the road surface from hitting the fuel tank while traveling.

ところで、フェアリングカバーの取り付けには、コストを低減するため、できる限り簡素な構造が求められる。このため、フェアリングカバーでは、固定個所を削減化することが進められている。
そこで、フェアリングカバーでは、固定個所の削減のために、車両前側の端部両側、すなわち車幅方向両側の個所をそれぞれ車体の下面をなす床部材の下面やサイドフレーム部材（車両前後方向に延びる部材）の下面など固定（ボルトやナット止めなど）することが行われている。 By the way, the attachment of the fairing cover requires a simple structure as much as possible in order to reduce the cost. For this reason, in the fairing cover, efforts are being made to reduce the number of fixing points.
Therefore, in the fairing cover, in order to reduce the number of fixed parts, both the end part on the front side of the vehicle, that is, the parts on both sides in the vehicle width direction are the lower surface of the floor member and the side frame member (extending in the vehicle longitudinal direction). The lower surface of the member is fixed (bolt, nut fastening, etc.).

近時では、最少の固定個所、すなわち二個所だけで、フェアリングカバーの安定した固定が行えるよう、フェアリングカバーの車両前側の端部の車幅方向一方の端側を、できる限り車両前側に寄せた個所で、ナット止め構造により車体の下面に固定し、反対側の車幅方向他方の端側を車両後側に寄せた対角の個所で、ナット止め構造により車体の下面に固定することも行われている。   Recently, one end in the vehicle width direction of the end of the vehicle front side of the fairing cover should be as far as possible to the front of the vehicle so that the fairing cover can be stably fixed with the minimum number of fixing points, that is, only two locations. Fix to the lower surface of the vehicle body with a nut-locking structure at the close position, and fix to the lower surface of the vehicle body with a nut-locking structure at the diagonal position where the other end in the vehicle width direction on the opposite side is close to the rear side of the vehicle Has also been done.

特開平６−１９９２５２号公報（図１３中の符号１５）JP-A-6-199252 (reference numeral 15 in FIG. 13)

ところが、同フェアリングカバーを固定する構造は、フェアリングカバーの両側は強固に固定されるものの、車幅方向中央側となる固定点間には十分に固定力が波及しにくいため、気流がフェアリングカバーを流れるときに生じる負圧の影響を受けて、同部分が振れ、すなわち振動を発生することがある。特にフェアリングカバーの車両前側の端部を対角の二個所で固定する構造だと、通常の固定に比べ、車両後側に寄せた固定点では、同固定点から車両前側、すなわちフェアリングカバーの車両前側の端までの自由端域が増大するために、同部分は、負圧の影響を受けやすく、振動が発生しやすくなる。   However, the structure for fixing the fairing cover is firmly fixed on both sides of the fairing cover, but the fixing force is not easily spread between the fixing points on the center side in the vehicle width direction. Under the influence of the negative pressure generated when flowing through the ring cover, the same portion may shake, that is, generate vibration. In particular, the structure where the end of the fairing cover on the front side of the vehicle is fixed at two diagonal positions, compared to the normal fixing, the fixed point that is closer to the rear side of the vehicle, from the fixed point to the front side of the vehicle, that is, the fairing cover Since the free end area to the vehicle front side of the vehicle increases, this portion is easily affected by negative pressure and vibration is likely to occur.

フェアリングカバーの振動を抑えるためには、多くの固定点で車両前側の端部全体を車体の下面に固定すればよいが、これでは固定する個所の増加からフェアリングカバーは、手間の要する複雑な構造となってしまい、当初の問題が解決できず、かなりコスト的な負担が強いられてしまう。
そこで、本発明の目的は、車体下面に固定する個所を増加させずに、フェアリングカバーの振動の発生が抑えられる車両のフェアリング構造を提供することにある。 In order to suppress the vibration of the fairing cover, it is only necessary to fix the entire front end of the vehicle to the lower surface of the vehicle body at many fixing points. As a result, the initial problem cannot be solved, and a considerable cost burden is imposed.
SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a vehicle fairing structure in which the occurrence of vibration of the fairing cover can be suppressed without increasing the number of places to be fixed to the lower surface of the vehicle body.

請求項１に記載のフェアリング構造は、上記目的を達成するために、フェアリングカバーの車両前側の端部の車幅方向両側を固定手段で車体の下面に固定し、少なくとも車幅方向両側の固定点間において重なり合う車体の下面およびフェアリングカバーの端部上面の一方に突起部を設け、同突起部が固定手段での固定により車体の下面とフェアリングカバーの端部上面間に挟み込まれることで、フェアリングカバーにおける車両前側の端部の車幅方向中央側を抑えることとした。   In order to achieve the above object, the fairing structure according to claim 1 fixes both sides in the vehicle width direction of the vehicle front side end portion of the fairing cover to the lower surface of the vehicle body by fixing means, and at least both sides in the vehicle width direction. A protrusion is provided on one of the lower surface of the vehicle body and the end surface of the end of the fairing cover that overlaps between the fixing points, and the protrusion is sandwiched between the lower surface of the vehicle body and the upper surface of the end of the fairing cover by fixing with the fixing means. Therefore, the center side in the vehicle width direction of the end portion of the fairing cover on the front side of the vehicle is suppressed.

同構成により、フェアリングカバーは、車幅方向両側は、固定手段により車体下面に固定されるまま、車幅方向中央側の動きが、突起部により抑えられる。
請求項２に記載の発明は、さらにフェアリングカバーを最も固定個所を抑えた二個所で固定しつつ、突起部でフェアリングカバーの振動の発生が抑えられるよう、固定手段を、フェアリングカバーの車両前側の端部のうち、車幅方向一方の端側を車両前側に寄せた第１地点で固定し、反対側の車幅方向他方の端側を第１地点とは対角の車両後側に寄せた第２地点で固定する固定構造で構成し、突起部を、第２地点からフェアリングカバーの車両前側の端までに形成されるフェアリングカバーの自由端域に配置させる構成を採用した。 With this configuration, the movement of the center side in the vehicle width direction is suppressed by the protrusions while the fairing cover is fixed to the lower surface of the vehicle body by the fixing means on both sides in the vehicle width direction.
According to the second aspect of the present invention, the fixing means is provided on the fairing cover so as to suppress the occurrence of vibration of the fairing cover at the protrusions while fixing the fairing cover at the two locations where the fixing portion is most suppressed. Out of the end portions on the front side of the vehicle, one end side in the vehicle width direction is fixed at a first point approaching the front side of the vehicle, and the other end side in the vehicle width direction on the opposite side is opposite to the first point on the rear side of the vehicle It is configured with a fixed structure that is fixed at the second point close to the vehicle, and a configuration is adopted in which the protrusion is arranged in the free end area of the fairing cover formed from the second point to the end of the fairing cover on the vehicle front side. .

請求項３に記載の発明は、さらに効果的に振動が抑えられるよう、突起部を、自由端域のうち、第２地点の周辺の地点に配置させた。
請求項４に記載の発明は、同じく突起部を、自由端域のうち、第２地点の周辺で、第２地点を挟んだ両側となる地点にそれぞれ配置させた。
請求項５に記載の発明は、突起部が簡単な構造ですむよう、突起部を、車体の下面あるいはフェアリングカバーの端部上面の一方に点状に形成されるものとした。 In the invention according to claim 3, the protrusion is arranged at a point around the second point in the free end region so that vibration is more effectively suppressed.
In the invention according to claim 4, the protrusions are similarly arranged in the free end area around the second point and on both sides of the second point.
In the invention described in claim 5, the protrusion is formed in a dot shape on one of the lower surface of the vehicle body or the upper surface of the end of the fairing cover so that the protrusion has a simple structure.

請求項１の発明によれば、フェアリングカバーの前側の端部は、固定手段で車幅方向両側を車体下面に固定する構造はそのままに、車幅方向中央側が突起部により抑えられ、同車幅方向中央側の振れ、すなわち振動することがなくなる。
したがって、フェアリングカバーは、車体下面に固定する個所を増加させずに、車体下を流れる気流を要因とした振動の発生が抑えられる。それ故、コスト的に安価なフェアリング構造が提供できる。 According to the first aspect of the present invention, the front end of the fairing cover is restrained by the protrusion on the center side in the vehicle width direction while the structure in which both sides in the vehicle width direction are fixed to the lower surface of the vehicle body by the fixing means. There is no vibration in the center in the width direction, that is, no vibration.
Therefore, the fairing cover can suppress the occurrence of vibration due to the airflow flowing under the vehicle body without increasing the number of places to be fixed to the lower surface of the vehicle body. Therefore, an inexpensive fairing structure can be provided.

請求項２の発明によれば、固定手段でフェアリングカバーの車両前側の端部を対角の第１地点と第２地点を固定する構造と、突起部を第２地点から車両前側の端までのフェアリングカバーの自由端域に配置する構造との併用により、二個所といった最も固定個所の数量を抑えた構造でありながら、固定点前側の自由端域での振れの発生を含み、効果的にフェアリングカバーの端部における振動発生を抑えることができる。それ故、一層、コストの低減に優れたフェアリング構造が提供できる。   According to invention of Claim 2, the structure which fixes the 1st point and 2nd point of a diagonal of the front part of a fairing cover by a fixing means, and a protrusion part from a 2nd point to the end of a vehicle front side In combination with the structure placed in the free end area of the fairing cover, it is effective in including the occurrence of runout in the free end area in front of the fixed point, while the structure has the smallest number of fixed places such as two places. In addition, the occurrence of vibration at the end of the fairing cover can be suppressed. Therefore, a fairing structure excellent in cost reduction can be provided.

請求項３の発明によれば、第２地点の周辺に突起部が配置されることにより、効果的にフェアリングカバー全体における振動の発生を防ぐことができる。
請求項４の発明によれば、さらに突起部が、第２地点の周辺で、第２地点を挟んだ両側の自由端域の地点に配置されることにより、一層、効果的にフェアリングカバー全体における振動の発生を防ぐことができる。 According to the third aspect of the present invention, the protrusions are arranged around the second point, so that the occurrence of vibrations in the entire fairing cover can be effectively prevented.
According to the invention of claim 4, the entire fairing cover is more effectively arranged by further disposing the protrusion around the second point at the free end region on both sides of the second point. Occurrence of vibrations in can be prevented.

請求項５の発明によれば、突起部は、簡単な構造ですみ、コストの低減に貢献する。   According to the invention of claim 5, the projecting portion has a simple structure and contributes to cost reduction.

本発明の第１の実施形態に係る車両のフェアリング構造を示す斜視図。The perspective view which shows the fairing structure of the vehicle which concerns on the 1st Embodiment of this invention. 図１中のＡ−Ａ線に沿う断面図。Sectional drawing which follows the AA line in FIG. 図１中のＢ−Ｂ線に沿う断面図。Sectional drawing which follows the BB line in FIG. 図１中の矢視Ｃから見た図。The figure seen from the arrow C in FIG. 同フェアリング構造の要部となる固定構造および突起部の構造を示す分解斜視図。The disassembled perspective view which shows the structure of the fixing structure used as the principal part of the fairing structure, and a projection part. 図５中のＤ−Ｄ線に沿う突起部の断面図。Sectional drawing of the projection part which follows the DD line | wire in FIG. 本発明の第２の実施形態の要部となる異なる突起部を示す断面図。Sectional drawing which shows the different protrusion part used as the principal part of the 2nd Embodiment of this invention. 本発明の第３の実施形態の要部となる異なる突起部を示す断面図。Sectional drawing which shows the different projection part used as the principal part of the 3rd Embodiment of this invention.

以下、本発明を図１〜図６に示す第１の実施形態にもとづいて説明する。
図１は自動車（車両）の車体のリヤ側の一部を示し、図２〜図４は同車体部分の各部（Ａ−Ａ線、Ｂ−Ｂ線、矢視Ｃ）の構造を示し、図５は同車体部分下に設置されたフェアリング構造の詳細を示している。
自動車（車両）の各部を説明すると、図１は自動車のリヤ側の下部（一部）を示していて、図中１は車体である。同車体１の下部には、前後方向に沿ってフロントフロアパネル３、リヤフロアパネル７が設けられている。ちなみに、フロントフロアパネル３とリヤフロアパネル７との間には、フロアキックアップ部５が形成され、リヤフロアパネル７をフロントフロアパネル３よりも高い位置に配置している。なお、フロントフロアパネル３の車幅方向中央（車体１の中心部）には、車体前後方向に延びるフロアトンネル部９が設けられている。またフロントフロアパネル３、リヤフロアパネル７の車幅方向両側の各下面には、フロアパネル３，７にならい車体前後方向に沿いに一対のサイドフレーム部材１１（例えばハット形の断面をもつ：片側しか図示せず）が設けられ、フロアパネル３，７と共に車体下部を形成している。 Hereinafter, the present invention will be described based on a first embodiment shown in FIGS.
FIG. 1 shows a part of the rear side of a vehicle body of an automobile (vehicle), and FIGS. 2 to 4 show the structure of each part (AA line, BB line, arrow C) of the vehicle body part. 5 shows details of the fairing structure installed under the vehicle body.
Each part of the automobile (vehicle) will be described. FIG. 1 shows a lower part (a part) on the rear side of the automobile. In FIG. A front floor panel 3 and a rear floor panel 7 are provided at the lower part of the vehicle body 1 along the front-rear direction. Incidentally, a floor kick-up portion 5 is formed between the front floor panel 3 and the rear floor panel 7, and the rear floor panel 7 is disposed at a position higher than the front floor panel 3. A floor tunnel portion 9 extending in the longitudinal direction of the vehicle body is provided at the center of the front floor panel 3 in the vehicle width direction (center portion of the vehicle body 1). A pair of side frame members 11 (for example, having a hat-shaped cross section: only on one side) are provided on the lower surfaces of the front floor panel 3 and the rear floor panel 7 on both sides in the vehicle width direction along the longitudinal direction of the vehicle body. (Not shown) is provided and forms the lower part of the vehicle body together with the floor panels 3 and 7.

フロントフロアパネル３の上面にフロントシート（図示しない）が据え付けられ、同じくリヤフロアパネル７の上面にリヤシート（図示しない）が据え付けられる。
リヤフロアパネル７の車幅方向両側の下面には、リヤサスペンションを構成するサスペンション部材（後輪用：いずれも図示しない）が設けられる。同サスペンション部材間の開放しているリヤフロアパネル７の下面には、本願の構造物に相当する燃料タンク１３が設けられている。ここでは、燃料タンク１３は、例えばリヤフロアパネル７のフロアトンネル部９を挟んだ車幅方向片側のフロア部分７ａの下面に据付けられている。ちなみに燃料タンク１３は、例えば角形のタンクで構成されている。 A front seat (not shown) is installed on the upper surface of the front floor panel 3, and a rear seat (not shown) is installed on the upper surface of the rear floor panel 7.
Suspension members (for rear wheels: none shown) constituting the rear suspension are provided on the lower surfaces of both sides in the vehicle width direction of the rear floor panel 7. A fuel tank 13 corresponding to the structure of the present application is provided on the lower surface of the open rear floor panel 7 between the suspension members. Here, the fuel tank 13 is installed on the lower surface of the floor portion 7a on one side in the vehicle width direction with the floor tunnel portion 9 of the rear floor panel 7 interposed therebetween, for example. Incidentally, the fuel tank 13 is constituted by, for example, a rectangular tank.

この燃料タンク１３は、フロアキックアップ部５と隣接した地点に配置されている。これで、車体下のリヤ側のスペースを活用して、車体下に燃料タンク１３を組み込んでいる。この燃料タンク１３の下部が、図２および図３に示されるようにフロアキックアップ部５から下方へ突き出ている。つまり、燃料タンク１３の下部は、最も下側の車体下面をなすフロントフロアパネル３の下面やサイドフレーム部材１１の下面よりも下方へ突き出ている。この突き出た燃料タンク１３の下部分は、車体下を流れる空気の気流α（図３）との衝突を招き、空気抵抗を増大させる要因となる。   The fuel tank 13 is disposed at a point adjacent to the floor kick-up unit 5. Thus, the fuel tank 13 is incorporated under the vehicle body by utilizing the space on the rear side under the vehicle body. The lower portion of the fuel tank 13 protrudes downward from the floor kick-up portion 5 as shown in FIGS. That is, the lower part of the fuel tank 13 protrudes downward from the lower surface of the front floor panel 3 and the lower surface of the side frame member 11 that form the lowermost lower surface of the vehicle body. The protruding lower portion of the fuel tank 13 causes a collision with the airflow α (FIG. 3) of the air flowing under the vehicle body, which causes an increase in air resistance.

そのため、燃料タンク１３の車体前側には、車体下を流れる気流αが燃料タンク１３と衝突するのを避けるフェアリング構造が設けられている。フェアリング構造は、燃料タンク１３の前側の床下部分に、例えばプレート部材から形成されたフェアリングカバー１５を据付けて構成される。
具体的にはフェアリングカバー１５は、例えば図２および図３に示されるように車幅方向長さが燃料タンク１３の車幅方向の寸法と同等の寸法をもち、前後方向長さが所定長さ、例えば燃料タンク１３の下面の端（車体前側の端）と、同端と隣接するフロントフロアパネル３の端側との間に応じた寸法をもつ角形のプレート部材が用いられる。このフェアリングカバー１５の車体前側の端部は、フロントフロアパネル３の端側の下面（車体下面）に取り付く取付座１６を有している。取付座１６は、縁部全体に沿って（車幅方向全体）に形成されている（帯形）。フェアリングカバー１５の車体後側（取付座１６から後側）は、傾斜した平坦な気流ガイド部１７で形成される。この気流ガイド部１７の端部が、燃料タンク１３の下面の端の近くまで延び、端を燃料タンク１３の下面と略同一となる地点に配置させている（片支持のフェアリングカバー）。これで、段差の有る、フロントフロアパネル３の下面と燃料タンク１３の下面間を平坦な面で連ねている。もちろん、取付座１６の一部および気流ガイド部１７の一部は、サイドフレーム部材１１を跨る凹部１８を有し、取付座１６に続く気流ガイド部１７をフロントフロアパネル３の下面と燃料タンク１３の下面間に平板状に配置させている（図１〜図４）。 Therefore, a fairing structure is provided on the front side of the vehicle body of the fuel tank 13 to prevent the airflow α flowing under the vehicle body from colliding with the fuel tank 13. The fairing structure is configured by installing a fairing cover 15 formed of, for example, a plate member in a lower floor portion on the front side of the fuel tank 13.
Specifically, as shown in FIGS. 2 and 3, for example, the fairing cover 15 has a length in the vehicle width direction that is the same as the size in the vehicle width direction of the fuel tank 13, and a length in the front-rear direction is a predetermined length. For example, a rectangular plate member having a size corresponding to an end of the lower surface of the fuel tank 13 (an end on the vehicle body front side) and an end side of the adjacent front floor panel 3 is used. The end of the fairing cover 15 on the front side of the vehicle body has a mounting seat 16 that is attached to the lower surface (lower surface of the vehicle body) of the end side of the front floor panel 3. The mounting seat 16 is formed along the entire edge (whole width direction) (band shape). The rear side of the vehicle body of the fairing cover 15 (the rear side from the mounting seat 16) is formed by an inclined flat airflow guide portion 17. The end portion of the airflow guide portion 17 extends to near the end of the lower surface of the fuel tank 13, and the end is disposed at a point substantially the same as the lower surface of the fuel tank 13 (single-supported fairing cover). Thus, the lower surface of the front floor panel 3 and the lower surface of the fuel tank 13 having a step are connected with a flat surface. Of course, a part of the mounting seat 16 and a part of the airflow guide portion 17 have a recess 18 straddling the side frame member 11, and the airflow guide portion 17 following the mounting seat 16 is connected to the lower surface of the front floor panel 3 and the fuel tank 13. It arrange | positions in flat form between the lower surfaces of (FIGS. 1-4).

つまり、フェアリングカバー１５によって、車体下を流れる気流、すなわちフロントフロアパネル３の下面を流れる気流αを、燃料タンク１３の平坦な下面へ導き、気流αが燃料タンク１３と衝突するのを避ける構造にしている（空気抵抗：低減）。
さらに述べると、フェアリングカバー１５は、同カバー１５を固定する固定点の数量を抑えるために、取付座１６（前側の端部）の全体を多くの個所で固定して片支持させるのではなく、図１〜図４に示されるように取付座１６のうちの車幅方向両側の個所（端部）を車体下面に固定することによって片支持させてある。 That is, the fairing cover 15 guides the airflow flowing under the vehicle body, that is, the airflow α flowing on the lower surface of the front floor panel 3 to the flat lower surface of the fuel tank 13, thereby preventing the airflow α from colliding with the fuel tank 13. (Air resistance: reduced).
More specifically, the fairing cover 15 does not support the whole of the mounting seat 16 (front end) in many places to support one piece in order to reduce the number of fixing points for fixing the cover 15. 1 to 4, the parts (end portions) on both sides in the vehicle width direction of the mounting seat 16 are fixed to the lower surface of the vehicle body so as to be supported in one piece.

例えば取付座１６は、フロアトンネル部９側の端部（車幅方向一方の端部）と、反対側のサイドフレーム部材１１の通る凹部１８の底壁部（車幅方向他方の端部）とを、それぞれ固定手段であるところの締結部材、例えばフロントフロアパネル３の下面（車体下部）やサイドフレーム部材１１の下面（車体下部）から下方へ突き出るように設けたスタッドボルト１９および同スタッドボルト１９に組み付くナット部材２０を用いて、車体下面に締結させてある。   For example, the mounting seat 16 includes an end portion on the floor tunnel portion 9 side (one end portion in the vehicle width direction), a bottom wall portion (the other end portion in the vehicle width direction) of the recess 18 through which the side frame member 11 on the opposite side passes. , A stud bolt 19 and a stud bolt 19 provided so as to protrude downward from fastening members that are fixing means, for example, the lower surface of the front floor panel 3 (lower portion of the vehicle body) and the lower surface of the side frame member 11 (lower portion of the vehicle body). It is fastened to the lower surface of the vehicle body using a nut member 20 assembled to the vehicle body.

ここでは、フェアリングカバー１５は、最も少ない固定個所、すなわち二点の固定個所で固定させてある（片支持）。これは、取付座１６の対角位置に二つの固定点を定めて、取付座１６を固定する構造である。具体的には、図２〜図５に示されるように取付座１６のうち、車幅方向一方の端側となるフロアトンネル部９側の端部（一方の端側）は、取付座１６のうちで、できるだけ車両前側に寄せた固定地点ａ（第１地点）にボルト挿通孔２１ａを形成して、同端部をできるだけ車両前側の地点で固定させる。また反対側の端部（車幅方向他方の端側）をなす凹部１８の底壁部は、取付座１６のうちで、固定地点ａとは最も対角となる車両後側に最も寄せた固定地点ｂ（第２地点）にボルト挿通孔２１ｂを形成して、凹部１８の底壁部をできるだけ車両後側の地点で固定させることによって、対角の二点の固定点ａ，ｂ（最少個数）で、フェアリングカバー１５全体を安定的に固定させている（片支持）。   Here, the fairing cover 15 is fixed at the minimum number of fixing points, that is, two fixing points (single support). This is a structure for fixing the mounting seat 16 by defining two fixing points at diagonal positions of the mounting seat 16. Specifically, as shown in FIGS. 2 to 5, among the mounting seats 16, the end portion (one end side) on the floor tunnel portion 9 side which is one end side in the vehicle width direction is the mounting seat 16. Among them, the bolt insertion hole 21a is formed at a fixing point a (first point) brought as close to the vehicle front side as possible, and the same end portion is fixed at a point on the vehicle front side as much as possible. In addition, the bottom wall portion of the concave portion 18 forming the opposite end portion (the other end side in the vehicle width direction) is fixed most closely to the rear side of the vehicle that is the most diagonal to the fixing point a in the mounting seat 16. By forming a bolt insertion hole 21b at a point b (second point) and fixing the bottom wall portion of the recess 18 at a point on the rear side of the vehicle as much as possible, two diagonal fixed points a and b (the minimum number) ), The entire fairing cover 15 is stably fixed (single support).

ここで、取付座１６の両側を固定する構造は、取付座１６の両側については強固に固定されるものの、取付座１６の中央側（幅方向）の部分、すなわち固定点ａ，ｂ間は十分な固定力が波及しにくい。このため、同部分が、気流ガイド部１７を流れる気流α、同気流αがもたらすフェアリングカバー１５内に生ずる負圧の影響を受けて、振れ、すなわち振動することがある。   Here, the structure for fixing both sides of the mounting seat 16 is firmly fixed on both sides of the mounting seat 16, but the center side (width direction) portion of the mounting seat 16, that is, between the fixing points a and b is sufficient. It is difficult for the fixed force to spread. For this reason, the same portion may be shaken, that is, vibrated under the influence of the airflow α flowing through the airflow guide portion 17 and the negative pressure generated in the fairing cover 15 caused by the airflow α.

特に最少個数の対角二個所で固定する構造は、これに加え、車両後側に寄せた固定点ｂにより、固定点ｂから取付座１６の車両前側の端までに形成される自由端域Ｓが増大するため、前側の自由端域Ｓ部分でも、同様に気流αがもたらすフェアリングカバー１５内に生ずる負圧の影響を受けて振動すしやすい。
そのため、フェリングカバー１５の取付座１６、車体下面のうちの一方には、この振動の発生を防ぐ手段が講じられている。 In particular, the structure in which the minimum number of two diagonals are fixed is, in addition to this, a free end region S formed from the fixing point b to the front end of the mounting seat 16 by the fixing point b approaching the vehicle rear side. Therefore, the front free end region S is also likely to vibrate due to the negative pressure generated in the fairing cover 15 caused by the air flow α.
Therefore, a means for preventing the occurrence of this vibration is provided on one of the mounting seat 16 of the ferring cover 15 and the lower surface of the vehicle body.

同手段は、図１〜図５に示されるように少なくとも固定点ａ，ｂ間において重なり合う取付座１６の上面および車体下面の一方、例えば取付座１６に突起部２５を設けたものである。ここでは、突起部２５は、例えば図６に示されるように取付座１６を構成するプレート部材にドーム状の凸成形を施して点状に形成され、先端部を、重なる相手側（他方）の車体下面へ突き出させている。これにより、突起部２５は、車体下部のフロントフロアパネル３、サイドフレーム部材１１に取付座１６が締結されるしたがい、取付座１６と、車体下面をなすフロントフロアパネル３の下面との間に挟み込まれる。これで、取付座１６の中央側（車幅方向）の動き（振れ）を抑える。   1 to 5, at least one of the upper surface of the mounting seat 16 and the lower surface of the vehicle body that overlap each other between the fixing points a and b, for example, a projection 25 is provided on the mounting seat 16. Here, for example, as shown in FIG. 6, the protrusion 25 is formed in a dot shape by subjecting the plate member constituting the mounting seat 16 to a dome-like convex molding, and the tip portion is overlapped on the other side (the other side). It protrudes to the underside of the car body. As a result, the protrusion 25 is sandwiched between the mounting seat 16 and the lower surface of the front floor panel 3 that forms the lower surface of the vehicle body as the mounting seat 16 is fastened to the front floor panel 3 and the side frame member 11 at the lower part of the vehicle body. It is. Thus, the movement (runout) of the mounting seat 16 on the center side (vehicle width direction) is suppressed.

これにより、フェアリングカバー１５の取付座１６の車幅方向両側は、ナット締めにより車体下面に固定され、同車幅方向中央側は、突起部２５がフロア下面に強く当たることで強固に支えられ、同部分の振れ、すなわち振動は抑えられる。
それ故、ファリングカバー１５は、ナット部材２０によって固定する個所を増加させずに振動の発生を防ぐことができる。これにより、コスト的に安価なフェアリング構造が実現できる。しかも、突起部２５は、フェアリングカバー１５の一部、具体的には取付座１６の上面に点状に形成するだけの簡単な構造なので、コスト的な負担が抑えられ、コストの低減に貢献する。 Thus, both sides in the vehicle width direction of the mounting seat 16 of the fairing cover 15 are fixed to the lower surface of the vehicle body by tightening nuts, and the center side in the vehicle width direction is firmly supported by the projection 25 strongly contacting the lower surface of the floor. The vibration of the same part, that is, the vibration is suppressed.
Therefore, the falling cover 15 can prevent the occurrence of vibration without increasing the number of places to be fixed by the nut member 20. Thereby, an inexpensive fairing structure can be realized. In addition, since the protrusion 25 is a simple structure that is simply formed in a spot shape on a part of the fairing cover 15, specifically, on the upper surface of the mounting seat 16, the cost burden can be suppressed, contributing to cost reduction. To do.

しかも、図１〜図５に示されるようにフェアリングカバー１５の取付座１６（前側の端部）を対角の二個所（固定点ａ、ｂ）で固定し、突起部２５を、固定点ｂより前側に形成される自由端域Ｓに配置する構造を用いると、フェアリングカバー１５を最も固定個所を抑えた構造で保ちながら、固定点ａ，ｂ間の振れ（動き）を抑えるだけでなく、自由端域Ｓにおける振れ（動き）、つまり振れやすい自由端域Ｓでの振動も防ぐことができる。つまり、最もコストの低減に優れた構造で、フェアリングカバー１５の振動発生を防ぐことができる。このため、同構造だと、一層、コストの低減に優れたフェアリングカバーが実現できる。   Moreover, as shown in FIGS. 1 to 5, the mounting seat 16 (front end) of the fairing cover 15 is fixed at two diagonal positions (fixed points a and b), and the protrusion 25 is fixed to the fixed point. If the structure arranged in the free end region S formed in front of b is used, the fairing cover 15 can be maintained with the structure that suppresses the fixed part most, and only the vibration (movement) between the fixed points a and b is suppressed. In addition, vibration (movement) in the free end region S, that is, vibration in the free end region S that is likely to swing can be prevented. That is, it is possible to prevent the vibration of the fairing cover 15 with the structure that is most excellent in reducing the cost. For this reason, with the same structure, a fairing cover that is further excellent in cost reduction can be realized.

特に突起部２５が、自由端域Ｓのうち、固定点ｂの周辺の地点に配置してあると、効果的に取付座１６の自由端域Ｓや固定点ａ，ｂ間の振れ（動き）を抑えることができる。
加えて、図１〜図５に示されるように自由端域Ｓのうち、固定点ｂの周辺で、同固定点ｂを挟んだ片側、ここでは取付座１６の中央側に突起部２５を配置し、反対の取付座１６の端側に同様な構造の突起部２６を追加して配置すると、振れやすい固定点ｂの周辺を効果的に抑えることができ、一層、効果的にフェアリングカバー１５の振動を防ぐことができる。 In particular, if the protrusion 25 is disposed at a point around the fixed point b in the free end region S, the deflection (movement) between the free end region S of the mounting seat 16 and the fixed points a and b can be effectively performed. Can be suppressed.
In addition, as shown in FIGS. 1 to 5, in the free end area S, the protrusion 25 is arranged around the fixed point b on one side of the fixed point b, here the central side of the mounting seat 16. If the protrusion 26 having the same structure is additionally provided on the end side of the opposite mounting seat 16, the periphery of the fixed point b that is likely to swing can be effectively suppressed, and the fairing cover 15 can be more effectively prevented. Can prevent vibration.

同構造は、本実施形態の如くフェアリングカバー１５の片側の固定点ａ（第１地点）を、フロントフロアパネル３の下面に固定し、反対側の固定点ｂ（第２地点）を、サイドフレーム部材１１の下面に固定するといった、異なる車体部材に固定することが余儀なくされ、固定点ｂの周辺が振れやすくなる場合には有効である。
なお、本発明は、上述した第１の実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲内で種々可変して実施しても構わない。 In this structure, as in this embodiment, the fixing point a (first point) on one side of the fairing cover 15 is fixed to the lower surface of the front floor panel 3, and the fixing point b (second point) on the opposite side is fixed to the side. This is effective when it is necessary to fix to a different body member such as fixing to the lower surface of the frame member 11 and the vicinity of the fixing point b is likely to swing.
Note that the present invention is not limited to the above-described first embodiment, and various modifications may be made without departing from the spirit of the present invention.

例えば第１の実施形態では、ドーム状に突き出た突起部２５を用いたが、これに限らず、図７に示される第２の実施形態のように台形状に突き出た突起部３５を用いても、図８に示される第３の実施形態のように三角形状に突き出た突起部４５を用いてもよく、突起部の形状や構造は問わない。なお、図７，８において第１の実施形態と同じ部分には同一符号を付して、その説明を省略した。   For example, in the first embodiment, the protrusion 25 protruding in a dome shape is used. However, the present invention is not limited to this, and the protrusion 35 protruding in a trapezoidal shape as in the second embodiment shown in FIG. 7 is used. Alternatively, the protrusion 45 protruding in a triangular shape as in the third embodiment shown in FIG. 8 may be used, and the shape and structure of the protrusion are not limited. 7 and 8, the same parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

また第１〜３の実施形態では、車体下面に取り付くフェアリングカバーの上面に突起部を設けたが、これに限らず、反対側のフェアリングカバーが取り付く車体下面、ここでは例えばフロアパネルの下面やサイドフレーム部材の下面に突起部を設けても構わない。また床下の構造物として燃料タンクを一例に挙げたが、これに限らず、例えばスペアタイヤを収めるための凹形の構造物でもよく、車体下へ突き出る構造物は燃料タンクに限定されるものではない。むろん、燃料タンクも、フロアトンネル部を挟んだ片側に配置される燃料タンクでなく、フロアトンネル部を跨って車幅方向に配置される燃料タンクでも構わない。また突起部は、少なくとも固定点ａ，ｂ間に一個所に有りさえすれば、フェアリングカバーの振れを抑える効果をもたらす。   In the first to third embodiments, the protrusion is provided on the upper surface of the fairing cover that is attached to the lower surface of the vehicle body. However, the present invention is not limited to this, and the lower surface of the vehicle body to which the opposite fairing cover is attached, for example, the lower surface of the floor panel. Alternatively, a protrusion may be provided on the lower surface of the side frame member. In addition, the fuel tank is given as an example of the structure under the floor. However, the structure is not limited to this. For example, a concave structure for storing a spare tire may be used, and the structure protruding below the vehicle body is not limited to the fuel tank. Absent. Of course, the fuel tank may also be a fuel tank arranged in the vehicle width direction across the floor tunnel portion instead of the fuel tank arranged on one side across the floor tunnel portion. Further, as long as the protrusion is at least at one position between the fixing points a and b, the effect of suppressing the swing of the fairing cover is brought about.

１ 車体
３，７，１１ フロントフロアパネル、リヤフロアパネル、サイドフレーム部材（車体下面を形成する部材）
１３ 燃料タンク（車体下の構造物）
１５ フェアリングカバー
１６ 取付座
１９，２０ スタッドボルト、ナット部材（固定手段）
２５，２６ 突起部
ａ，ｂ 固定点（第１地点、第２地点）
Ｓ 自由端域
α 気流 1 Car body 3, 7, 11 Front floor panel, rear floor panel, side frame member (member forming the lower surface of the car body)
13 Fuel tank (structure under the car body)
15 Fairing cover 16 Mounting seat 19, 20 Stud bolt, nut member (fixing means)
25, 26 Protruding part a, b Fixed point (first point, second point)
S Free end region α Air flow

Claims (5)

車体の下面に当該車体下面より下方へ突き出るように据付けた構造物の車体前後方向前側に、車両前側の端部が前記車体の下面に固定され、車両後側が前記構造物の下面へ延びるフェアリングカバーを設け、前記車体下を流れる気流を前記構造物の下面へ導く車両のフェアリング構造であって、
前記フェアリングカバーの前記車両前側の端部における車幅方向両側を前記車体の下面に固定する固定手段と、
少なくとも前記固定手段で固定する車幅方向両側の固定点間において重なり合う前記車体の下面および前記フェアリングカバーの端部上面の一方に設けられ、前記固定手段の固定により前記車体の下面と前記フェアリングカバーの端部上面間に挟み込まれる突起部と
を具備したことを特徴とする車両のフェアリング構造。 A fairing in which the front end of the vehicle is fixed to the lower surface of the vehicle body and the vehicle rear side extends to the lower surface of the structure. A vehicle fairing structure that provides a cover and guides the airflow flowing under the vehicle body to the lower surface of the structure,
Fixing means for fixing both sides in the vehicle width direction at the vehicle front side end of the fairing cover to the lower surface of the vehicle body;
At least one of a lower surface of the vehicle body and an upper surface of an end portion of the fairing cover that overlap each other between fixing points on both sides in the vehicle width direction fixed by the fixing means, and the lower surface of the vehicle body and the fairing are fixed by fixing the fixing means. A vehicle fairing structure, comprising: a projection sandwiched between upper surfaces of end portions of the cover. 前記固定手段は
前記フェアリングカバーの前記車両前側の端部のうち、車幅方向一方の端側を車両前側に寄せた第１地点で固定し、反対側の車幅方向他方の端側を前記第１地点とは対角の車両後側に寄せた第２地点で固定する固定構造で構成され、
前記突起部は、前記第２地点から前記フェアリングカバーの車両前側の端までに形成される前記フェアリングカバーの自由端域に配置される
ことを特徴とする請求項１に記載の車両のフェアリング構造。 The fixing means fixes one end side in the vehicle width direction of the end portion on the vehicle front side of the fairing cover at a first point approaching the vehicle front side, and fixes the other end side in the vehicle width direction on the opposite side to the front side. The first point is composed of a fixed structure that is fixed at the second point near the rear of the diagonal vehicle,
2. The vehicle fair according to claim 1, wherein the protrusion is disposed in a free end region of the fairing cover formed from the second point to an end of the fairing cover on the front side of the vehicle. Ring structure. 前記突起部は、前記自由端域のうち、前記第２地点の周辺に配置されることを特徴とする請求項２に記載の車両のフェアリング構造。   The vehicle fairing structure according to claim 2, wherein the protrusion is disposed around the second point in the free end region. 前記突起部は、前記自由端域のうち、前記第２地点の周辺で、前記第２地点を挟んだ両側となる地点にそれぞれ配置されることを特徴とする請求項３に記載の車両のフェアリング構造。   4. The vehicle fair according to claim 3, wherein the protrusions are respectively arranged at points on both sides of the second point around the second point in the free end region. 5. Ring structure. 前記突起部は、前記車体の下面あるいは前記フェアリングカバーの端部上面の一方に点状に形成されるものであることを特徴とする請求項１ないし請求項４のいずれか一つに記載の車両のフェアリング構造。   5. The projection according to claim 1, wherein the protrusion is formed in a dot shape on one of a lower surface of the vehicle body and an upper surface of an end portion of the fairing cover. Vehicle fairing structure.
JP2012022043A 2012-02-03 2012-02-03 Vehicle fairing structure Pending JP2013159205A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015047883A (en) * 2013-08-29 2015-03-16 三菱自動車工業株式会社 Lower part structure of vehicle
CN112319213A (en) * 2020-11-10 2021-02-05 东风柳州汽车有限公司 Vehicle body oil tank guide plate and vehicle with same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015047883A (en) * 2013-08-29 2015-03-16 三菱自動車工業株式会社 Lower part structure of vehicle
CN112319213A (en) * 2020-11-10 2021-02-05 东风柳州汽车有限公司 Vehicle body oil tank guide plate and vehicle with same

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