JP6705621B2 - Vehicle bumper structure - Google Patents
Vehicle bumper structure Download PDFInfo
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- JP6705621B2 JP6705621B2 JP2014243243A JP2014243243A JP6705621B2 JP 6705621 B2 JP6705621 B2 JP 6705621B2 JP 2014243243 A JP2014243243 A JP 2014243243A JP 2014243243 A JP2014243243 A JP 2014243243A JP 6705621 B2 JP6705621 B2 JP 6705621B2
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- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 238000010079 rubber tapping Methods 0.000 description 2
- 238000011109 contamination Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
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Description
本発明は、車両用バンパ構造に関する。 The present invention relates to a vehicle bumper structure.
下記特許文献１には、バンパ一体型マフラー構造に関する発明が開示されている。このバンパ一体型マフラー構造では、リアバンパ（バンパカバー）にマフラーからの排気ガスを排出するための排気部が形成されており、この排気部にはバンパディフューザー（バッフル）が配置されている。一方、マフラーにはシェーディングプレートが取り付けられており、このシェーディングプレートによってバンパディフューザーの車両前方側に遮蔽部が設定されている。このため、マフラーとバンパディフューザーとの間隙から車体の構成品や路面等を見えないようにすることができ、その結果、車両後部の外観品質を確保することができる。 The following patent document 1 discloses an invention relating to a bumper-integrated muffler structure. In this bumper-integrated muffler structure, an exhaust portion for discharging exhaust gas from the muffler is formed in the rear bumper (bumper cover), and a bumper diffuser (baffle) is arranged in this exhaust portion. On the other hand, a shading plate is attached to the muffler, and the shading plate sets a shielding portion on the vehicle front side of the bumper diffuser. For this reason, the components of the vehicle body, the road surface, and the like can be hidden from the gap between the muffler and the bumper diffuser, and as a result, the appearance quality of the rear portion of the vehicle can be ensured.
しかしながら、上記特許文献１に記載された先行技術による場合、バンパディフューザーの車両後方側の端部を成すフランジ部の位置が、リアバンパの意匠面よりも車両前方側に設定されている。このため、マフラーからバンパディフューザーを経て排出された排気流がリアバンパの意匠面に当たることでリアバンパの意匠面が汚れることがある。 However, in the case of the prior art described in Patent Document 1, the position of the flange portion forming the end portion on the vehicle rear side of the bumper diffuser is set to the vehicle front side with respect to the design surface of the rear bumper. Therefore, the exhaust flow discharged from the muffler through the bumper diffuser may hit the design surface of the rear bumper, and the design surface of the rear bumper may be contaminated.
本発明は上記事実を考慮し、排気流によるバンパカバーへの汚れの付着を抑制することができる車両用バンパ構造を得ることが目的である。 The present invention has been made in consideration of the above facts, and an object thereof is to obtain a vehicle bumper structure capable of suppressing adhesion of dirt to a bumper cover due to an exhaust flow.
請求項１に記載の本発明に係る車両用バンパ構造は、車両後方外側に面する意匠面を有するバンパカバー本体部と、当該バンパカバー本体部に形成されると共に排気管の排気口から排出される排気流の流路における下流側に配置された開口部と、を含んで構成され、車両後端部に配置されると共に車両幅方向に延在するバンパカバーと、前記開口部の周縁部に沿って配置されると共に前記バンパカバー本体部における前記開口部周りの意匠面よりも車両後方側に突出した開口縁部と、当該開口縁部と別体とされると共に当該開口縁部の車両前方側に配置されて当該開口縁部と接合された筒部と、当該筒部に設けられた複数のブラケットと、を含んで構成され、当該ブラケットのみが前記バンパカバーに取り付けられたバッフルと、を備え、前記バッフルの車両上方側の部分には、前記排気口の車両後方側に配置されると共に車両幅方向に見た断面視で前記流路が車両後方側に向かって狭まる方向に傾斜し、かつ前記排気流を受ける上側受け面部と、当該上側受け面部の車両後方側で当該上側受け面部と連続し、かつ前記開口縁部の車両後方側の端部よりも車両前方側に配置されると共に車両幅方向に見た断面視で当該流路が車両後方側に向かって拡がる方向に傾斜した上側剥離面部と、が設けられている。 A bumper structure for a vehicle according to the present invention according to claim 1 is formed on the bumper cover main body having a design surface facing the vehicle rear outer side, and is discharged from an exhaust port of an exhaust pipe while being formed on the bumper cover main body. An opening arranged on the downstream side in the exhaust gas flow passage, the bumper cover being arranged at the vehicle rear end portion and extending in the vehicle width direction, and the peripheral portion of the opening. An opening edge portion that is disposed along the same and that protrudes toward the vehicle rear side from the design surface around the opening portion in the bumper cover main body portion, and is separate from the opening edge portion, and the vehicle front portion of the opening edge portion. A baffle configured to include a tubular portion disposed on the side and joined to the opening edge portion, and a plurality of brackets provided on the tubular portion, and only the bracket being attached to the bumper cover. In the vehicle upper side portion of the baffle, the flow path is arranged in a vehicle rear side of the exhaust port and is inclined in a direction in which the flow passage narrows toward a vehicle rear side in a cross-sectional view seen in the vehicle width direction, And an upper receiving surface portion that receives the exhaust flow, a vehicle rear side of the upper receiving surface portion that is continuous with the upper receiving surface portion, and is disposed on the vehicle front side with respect to the vehicle rear side end portion of the opening edge portion. An upper peeling surface portion that is inclined in a direction in which the flow path expands toward the vehicle rear side in a cross-sectional view viewed in the vehicle width direction is provided .
請求項１に記載の本発明によれば、車両幅方向に延在するバンパカバーが車両後端部に配置されており、当該バンパカバーのバンパカバー本体部における車両後方外側に面する意匠面によって車両後部の外観意匠の一部が構成されている。また、バンパカバー本体部には開口部が形成されており、当該開口部は、排気管の排気口から排出される排気流の流路における下流側に配置されている。そして、バッフルの開口縁部が、バンパカバーにおける開口部の周縁部に沿って配置されている。このため、排気管からの排気流は、バッフルの開口縁部から車両後方外側に向かって排出されていく。 According to the first aspect of the present invention, the bumper cover extending in the vehicle width direction is arranged at the vehicle rear end portion, and the bumper cover main body portion of the bumper cover has a design surface facing the vehicle rear outside. A part of the exterior design of the rear part of the vehicle is configured. Further, an opening is formed in the bumper cover body, and the opening is arranged on the downstream side in the flow path of the exhaust flow discharged from the exhaust port of the exhaust pipe. The opening edge of the baffle is arranged along the peripheral edge of the opening in the bumper cover. Therefore, the exhaust flow from the exhaust pipe is discharged from the opening edge of the baffle toward the vehicle rear outside.
ところで、バッフルの開口縁部の位置がバンパカバーの意匠面よりも車両前方側に設定されていると、当該開口縁部から排出された排気流が当該意匠面に当たることで当該意匠面が汚れることがある。 By the way, when the position of the opening edge portion of the baffle is set to the vehicle front side with respect to the design surface of the bumper cover, the exhaust flow discharged from the opening edge portion hits the design surface and the design surface becomes dirty. There is.
ここで、本発明では、バッフルの開口縁部がバンパカバー本体部における開口部周りの意匠面よりも車両後方側に突出している。このため、排気管からの排気流は、バンパカバー本体部における開口部周りの意匠面よりも車両後方側の位置で、バッフルの開口縁部から排出される。その結果、排気管からの排気流は、バンパカバー本体部における開口部周りの意匠面から離れた位置に排出されるようになる。 Here, in the present invention, the opening edge portion of the baffle projects toward the vehicle rear side from the design surface around the opening in the bumper cover main body portion. Therefore, the exhaust flow from the exhaust pipe is discharged from the opening edge of the baffle at a position on the vehicle rear side with respect to the design surface around the opening in the bumper cover body. As a result, the exhaust flow from the exhaust pipe is exhausted to a position away from the design surface around the opening in the bumper cover body.
また、本発明によれば、バッフルの車両上方側の部分に向かって排出される排気流が、排気管の排気口の車両後方側に配置された上側受け面部に受けられ、当該排気流が当該上側受け面部に沿って車両後方側に排出されていく。一方、上側受け面部の車両後方側には、当該上側受け面部と連続し、かつ開口縁部の車両後方側の端部よりも車両前方側に配置された上側剥離面部が設けられている。そして、上側受け面部は排気流の流路が車両後方側に向かって狭まる方向に傾斜しており、上側剥離面部は当該流路が車両後方側に向かって拡がる方向に傾斜している。このため、上側受け面部に沿って排出される排気流は、上側受け面部と上側剥離面部との境界部を通過するときに、流速が速くなり、圧力は低下する。その結果、排気流は、上側受け面部と上側剥離面部との境界部を剥離点としてバッフルから剥離し、当該上側剥離面部と剥離した状態でバッフルの開口縁部の車両後方側に排出されていく。 Further , according to the present invention, the exhaust flow discharged toward the vehicle upper side portion of the baffle is received by the upper receiving surface portion arranged on the vehicle rear side of the exhaust port of the exhaust pipe, and the exhaust flow is It is discharged toward the vehicle rear side along the upper receiving surface portion. On the other hand, the rear side of the upper retaining surface, contiguous with the upper retaining surface, and the top release surface disposed on the vehicle front side than the end portion on the vehicle rear side of the opening edge portion is provided. The upper receiving surface portion is inclined in a direction in which the exhaust flow passage narrows toward the vehicle rear side, and the upper separation surface portion is inclined in a direction in which the passage extends toward the vehicle rear side. Therefore, the exhaust stream discharged along the upper receiving surface, when passing through the boundary between the upper retaining surface and the upper peel surface, the flow velocity is faster, the pressure is reduced. As a result, the exhaust flow is separated from the baffle with the boundary portion between the upper receiving surface portion and the upper separation surface portion as a separation point, and is discharged to the vehicle rear side of the opening edge portion of the baffle in the state of being separated from the upper separation surface portion. ..
請求項２に記載の本発明に係る車両用バンパ構造は、請求項１に記載の発明において、前記排気口の下端部の車両上下方向の位置と前記バッフルの車両下方側を構成しかつ前記流路に面する下側内面部における車両上下方向で最も高い位置とが一致している。 The vehicle bumper structure according to a second aspect of the present invention is the vehicle bumper structure according to the first aspect, which constitutes a vehicle vertical position of a lower end portion of the exhaust port and a vehicle lower side of the baffle. The highest position in the vehicle up-down direction on the lower inner surface facing the road coincides.
請求項２に記載の本発明によれば、排気管の排気口における下端部の車両上下方向の位置とバッフルの車両下方側を構成しかつ排気流の流路に面する下側内面部における車両上下方向で最も高い位置とが一致している。このため、排気流とバッフルの下側内面部との接触面積を小さくして当該排気流がバッフルから受ける抵抗を小さくすることができると共に、バッフルから排出されていく排気流を整流することができる。 According to the present invention as set forth in claim 2 , the vehicle in the lower inner surface portion which constitutes the vehicle vertical direction position of the lower end portion of the exhaust port of the exhaust pipe and the vehicle lower side of the baffle and faces the exhaust flow passage. The highest position in the vertical direction matches. Therefore, the contact area between the exhaust flow and the lower inner surface of the baffle can be reduced to reduce the resistance of the exhaust flow from the baffle, and the exhaust flow discharged from the baffle can be rectified. .
請求項３に記載の本発明に係る車両用バンパ構造は、請求項２に記載の発明において、前記バッフルの車両下方側の部分には、前記排気口の車両後方側でかつ前記上側受け面部よりも車両前方側に配置されると共に車両幅方向に見た断面視で前記流路が車両後方側に向かって狭まる方向に傾斜し、かつ前記排気流を受ける下側受け面部と、当該下側受け面部の車両後方側で当該下側受け面部と連続し、かつ前記上側剥離面部よりも車両前方側に配置されると共に車両幅方向に見た断面視で当該流路が車両後方側に向かって拡がる方向に傾斜した下側剥離面部と、が設けられている。 The vehicle bumper structure according to a third aspect of the present invention is the vehicle bumper structure according to the second aspect , wherein a portion of the baffle on a vehicle lower side is on a vehicle rear side of the exhaust port and from the upper receiving surface portion. the flow path is inclined in a direction that narrows toward the vehicle rear side in a sectional view as seen in the arranged Rutotomoni vehicle width direction on the front side of the vehicle, and a lower retaining surface for receiving the exhaust stream, receiving the lower continuous with the lower retaining surface at the vehicle rear side of the face portion, and the flow path cross-sectional view as seen in the arranged Rutotomoni vehicle width direction on the front side of the vehicle than the top release surface portion spreads toward the vehicle rear side a lower peel surface which is inclined in a direction, are provided.
請求項３に記載の本発明によれば、上側受け面部と上側剥離面部との境界部よりも下側受け面部と下側剥離面部との境界部の方が車両前方側に位置している。このため、排気管からの排気流の車両下方側の剥離点は、当該排気流の車両上方側の剥離点よりも車両前方側となる。その結果、排気管からの排気流は、先に車両下方側で剥離し、次いで車両上方側で剥離することとなり、排気流がバッフルから排出されるときには、当該排気流は車両下方側に向けて排出される。 According to the present invention as set forth in claim 3 , the boundary between the lower receiving surface and the lower peeling surface is located closer to the vehicle front side than the boundary between the upper receiving surface and the upper peeling surface. Therefore, the separation point on the vehicle lower side of the exhaust flow from the exhaust pipe is on the vehicle front side than the separation point on the vehicle upper side of the exhaust flow. As a result, the exhaust flow from the exhaust pipe is separated first on the vehicle lower side and then on the vehicle upper side.When the exhaust flow is discharged from the baffle, the exhaust flow is directed to the vehicle lower side. Is discharged.
以上説明したように、請求項１に記載の本発明に係る車両用バンパ構造は、排気流によるバンパカバーへの汚れの付着を抑制することができるという優れた効果を有する。 As described above, the vehicle bumper structure according to the first aspect of the present invention has an excellent effect that dirt can be prevented from adhering to the bumper cover due to the exhaust flow.
また、本発明に係る車両用バンパ構造は、排気管からの排気流をバンパカバー本体部の意匠面から離れていくように整流することができるという優れた効果を有する。 In addition, the vehicle bumper structure according to the present invention has an excellent effect that the exhaust flow from the exhaust pipe can be rectified so as to be separated from the design surface of the bumper cover body.
請求項２に記載の本発明に係る車両用バンパ構造は、排気管からの排気流の乱れを抑制し、当該排気流を安定した状態で車両後方側に排出することができるという優れた効果を有する。 The vehicle bumper structure according to the second aspect of the present invention has an excellent effect that the turbulence of the exhaust flow from the exhaust pipe is suppressed and the exhaust flow can be discharged to the vehicle rear side in a stable state. Have.
請求項３に記載の本発明に係る車両用バンパ構造は、排気管からの排気流の向きを車両下方側に変更し、当該排気流がバンパカバー本体部の意匠面に付着することを抑制することができるという優れた効果を有する。 In the vehicle bumper structure according to the third aspect of the present invention, the direction of the exhaust flow from the exhaust pipe is changed to the vehicle lower side, and the exhaust flow is prevented from adhering to the design surface of the bumper cover body. It has an excellent effect of being able to.
＜第１実施形態＞
以下、図１〜図５を用いて、本発明の実施形態に係る車両用バンパ構造が適用された車両１０について説明する。なお、各図に適宜示される矢印ＦＲは車両前方側を示しており、矢印ＵＰは車両上方側を示しており、矢印ＯＵＴは車両幅方向外側を示している。
<First Embodiment>
Hereinafter, a vehicle 10 to which the vehicle bumper structure according to the embodiment of the present invention is applied will be described with reference to FIGS. 1 to 5. In addition, an arrow FR shown in each drawing appropriately indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.
まず、図５を用いて車両１０の車両後部１２の構成について説明する。車両後部１２の後端部１２Ａには、車両幅方向を長手方向とされて樹脂材等で構成されたバンパカバー１４が配置されている。このバンパカバー１４は、車両幅方向に延在するバンパカバー本体部１６と、バンパカバー本体部１６の車両幅方向両端部から車両前方へ向けて延出されたバンパカバーサイド部１８とを含んで構成されている。 First, the configuration of the vehicle rear portion 12 of the vehicle 10 will be described with reference to FIG. At the rear end portion 12A of the vehicle rear portion 12, a bumper cover 14 made of a resin material or the like is arranged with the vehicle width direction being the longitudinal direction. The bumper cover 14 includes a bumper cover body portion 16 extending in the vehicle width direction, and a bumper cover side portion 18 extending toward the vehicle front from both end portions of the bumper cover body portion 16 in the vehicle width direction. It is configured.
バンパカバー本体部１６は、板厚方向を車両前後方向とされると共にバンパカバー本体部１６の主部を構成する後壁部１６Ａと、当該後壁部１６Ａの車両下方側の端部から車両前方下側に傾斜する傾斜壁部１６Ｂとを含んで構成されている。より詳しくは、図１にも示されるように、後壁部１６Ａと傾斜壁部１６Ｂとは別部材で構成されており、傾斜壁部１６Ｂには当該傾斜壁部１６Ｂの車両上方側の端部に沿って車両前方側に延出されたフランジ部１６Ｃが設けられている。一方、後壁部１６Ａの車両下方側の端部には、当該端部に沿って車両前方側に延出された延出部１６Ｄが設けられており、当該延出部１６Ｄに傾斜壁部１６Ｂに設けられたフランジ部１６Ｃが接合されている。これにより、後壁部１６Ａと傾斜壁部１６Ｂとが一体となって車両後方外側に面する意匠面２０を構成している。なお、延出部１６Ｄの車両前方側の端部には当該端部に沿って車両下方側に延出されたフランジ部１６Ｅが設けられており、当該フランジ部１６Ｅには、後述するように、バッフル２８が取り付けられている。 The bumper cover main body portion 16 has a rear wall portion 16A that is a main portion of the bumper cover main body portion 16 with the plate thickness direction being the vehicle front-rear direction, and a vehicle front side from an end portion of the rear wall portion 16A on the vehicle lower side. It is configured to include an inclined wall portion 16B that inclines downward. More specifically, as shown in FIG. 1, the rear wall portion 16A and the inclined wall portion 16B are configured as separate members, and the inclined wall portion 16B has an end portion on the vehicle upper side of the inclined wall portion 16B. A flange portion 16C extending toward the front side of the vehicle along the above is provided. On the other hand, an extension portion 16D that extends toward the vehicle front side along the end portion is provided at the vehicle lower side end portion of the rear wall portion 16A, and the inclined wall portion 16B is provided on the extension portion 16D. The flange portion 16C provided at is joined. As a result, the rear wall portion 16A and the inclined wall portion 16B integrally form a design surface 20 facing the vehicle rear outer side. A flange portion 16E extending toward the vehicle lower side along the end portion is provided at an end portion of the extension portion 16D on the vehicle front side, and the flange portion 16E is, as described later, The baffle 28 is attached.
また、図２にも示されるように、傾斜壁部１６Ｂの車両下方側には、開口部２２が形成されている。この開口部２２は、車両後方側から見て上辺が下辺よりも車両幅方向内側に配置された平行四辺形状とされると共に、車両下方側が開放されている。また、開口部２２は、車両後方側から見て、排気管２４の排気口２６がその内部に納まるように配置されており、換言すれば、開口部２２は、排気管２４の排気口２６から排出される排気流Ｗの流路６０における下流側に配置されている。 Further, as shown in FIG. 2, an opening 22 is formed on the vehicle lower side of the inclined wall portion 16B. The opening 22 has a parallelogram shape in which the upper side is arranged on the inner side in the vehicle width direction than the lower side when viewed from the vehicle rear side, and the vehicle lower side is open. Further, the opening 22 is arranged so that the exhaust port 26 of the exhaust pipe 24 is housed therein, when viewed from the vehicle rear side. In other words, the opening 22 is located from the exhaust port 26 of the exhaust pipe 24. It is arranged on the downstream side of the flow path 60 of the exhaust flow W to be discharged.
ここで、本実施形態では、バンパカバー１４に取り付けられたバッフル２８の構成に特徴がある。以下、本実施形態の要部を構成するバッフル２８の構成について詳細に説明する。 Here, the present embodiment is characterized by the configuration of the baffle 28 attached to the bumper cover 14. Hereinafter, the configuration of the baffle 28 that constitutes the main part of this embodiment will be described in detail.
図１及び図２に示されるように、バッフル２８は、車両後方側から見てバンパカバー１４の開口部２２の内側に配置された枠状の開口縁部３０と、当該開口縁部３０の車両前方側に設けられた筒部３８と、によってその主部が構成されている。そして、筒部３８の車両上方側には上側ブラケット３２が、当該筒部３８の車両幅方向内側には内側ブラケット３４が、当該筒部３８の車両幅方向外側には外側ブラケット３６が、それぞれ取り付けられている。 As shown in FIGS. 1 and 2, the baffle 28 includes a frame-shaped opening edge portion 30 arranged inside the opening portion 22 of the bumper cover 14 when viewed from the vehicle rear side, and a vehicle of the opening edge portion 30. The main portion is configured by the tubular portion 38 provided on the front side. The upper bracket 32 is attached to the upper side of the tubular portion 38 in the vehicle, the inner bracket 34 is attached to the inner side of the tubular portion 38 in the vehicle width direction, and the outer bracket 36 is attached to the outer side of the tubular portion 38 in the vehicle width direction. Has been.
筒部３８は、その車両前方側の部分を構成しかつ円筒状を成す円筒部３８Ａと、円筒部３８Ａから車両後方側の部分を構成しかつ筒部３８の開口面積が車両前方側から車両後方側にかけて拡張されるように構成された拡張部３８Ｂと、を含んで構成されている。より詳しくは、円筒部３８Ａは、車両後方側に向かって縮径しかつ排気管２４の排気口２６側の端部２４Ａを収容可能な形状とされている。一方、拡張部３８Ｂの縦断面形状は、車両前方側から車両後方側にかけて円形状から車両幅方向に延びる四角形状へと徐変している。そして、拡張部３８Ｂの車両後方側の開口端部３８Ｂ１では車両後方側から見て上辺が下辺よりも車両幅方向内側に配置された平行四辺形状とされている。なお、図４にも示されるように、拡張部３８Ｂの開口端部３８Ｂ１は、車両幅方向外側でかつ車両後方側から見たときの開口面積が最も大きくなるように、その形状が設定されている。 The tubular portion 38 constitutes a portion on the vehicle front side and has a cylindrical shape, and a portion on the vehicle rear side from the cylindrical portion 38A, and the opening area of the tubular portion 38 is from the vehicle front side to the vehicle rear side. And an expansion portion 38B configured to be expanded toward the side. More specifically, the cylindrical portion 38A has a shape that reduces in diameter toward the vehicle rear side and can accommodate the end portion 24A of the exhaust pipe 24 on the exhaust port 26 side. On the other hand, the vertical cross-sectional shape of the expanded portion 38B gradually changes from a circular shape to a rectangular shape extending in the vehicle width direction from the vehicle front side to the vehicle rear side. The opening end portion 38B1 on the vehicle rear side of the expansion portion 38B has a parallelogram shape in which the upper side is arranged on the inner side in the vehicle width direction than the lower side when viewed from the vehicle rear side. As shown in FIG. 4, the opening end portion 38B1 of the expansion portion 38B is set to have the largest opening area when viewed from the vehicle width direction outer side and the vehicle rear side. There is.
また、筒部３８は、車両幅方向内側でかつ車両上方側の箇所と車両幅方向外側でかつ車両下方側の箇所との２箇所で分割されており、その車両上方側の部分が上側構成部４０で構成されると共に、その車両下方側の部分が下側構成部４２で構成されている。なお、以下では、上側構成部４０における円筒部３８Ａを構成する部分を上側半円筒部４０Ａと称すると共に、当該上側構成部４０における拡張部３８Ｂを構成する部分を上側拡張部４０Ｂと称する。また、下側構成部４２における円筒部３８Ａを構成する部分を下側半円筒部４２Ａと称すると共に、当該下側構成部４２における拡張部３８Ｂを構成する部分を下側拡張部４２Ｂと称する。 In addition, the tubular portion 38 is divided into two portions, that is, a vehicle inner side in the vehicle width direction and a vehicle upper side and a vehicle outer side in the vehicle width direction and a vehicle lower side, and the vehicle upper side portion is an upper constituent portion. 40, and the lower part of the vehicle is composed of a lower part 42. In addition, below, the part which comprises 38 A of cylindrical parts in the upper side structure part 40 is called upper half cylindrical part 40A, and the part which comprises the expansion part 38B in the said upper side structure part 40 is called upper side expansion part 40B. Further, a portion of the lower constituent portion 42 that constitutes the cylindrical portion 38A is referred to as a lower semi-cylindrical portion 42A, and a portion of the lower constituent portion 42 that constitutes the expanded portion 38B is referred to as a lower expanded portion 42B.
図１に示されるように、上側構成部４０を構成する上側半円筒部４０Ａは、その内径が車両前後方向で一定とされており、当該上側半円筒部４０Ａは、上側拡張部４０Ｂの車両後方側を構成する第１上側絞り部４０Ｂ１と連続している。第１上側絞り部４０Ｂ１は、車両後方側に向かって筒部３８の開口面積が緩やかに縮小されるように形成されおり、当該第１上側絞り部４０Ｂ１の車両後方側には、当該第１上側絞り部４０Ｂ１からそのまま車両後方側に延出されて平坦部４０Ｂ２が形成されている。そして、平坦部４０Ｂ２には、後述するように上側ブラケット３２が取り付けられている。 As shown in FIG. 1, the inner diameter of the upper semi-cylindrical portion 40A forming the upper constituent portion 40 is constant in the vehicle front-rear direction, and the upper semi-cylindrical portion 40A is located at the vehicle rear side of the upper expansion portion 40B. It is continuous with the first upper throttle portion 40B1 forming the side. The first upper throttle portion 40B1 is formed such that the opening area of the tubular portion 38 is gradually reduced toward the vehicle rear side. The first upper throttle portion 40B1 is provided on the vehicle rear side of the first upper throttle portion 40B1. A flat portion 40B2 is formed by directly extending from the narrowed portion 40B1 toward the vehicle rear side. Then, the upper bracket 32 is attached to the flat portion 40B2 as described later.
また、平坦部４０Ｂ２の車両後方側には、当該平坦部４０Ｂ２と連続して車両後方側に向かって筒部３８の開口面積が縮小されるように形成された第２上側絞り部４０Ｂ３が設けられている。この第２上側絞り部４０Ｂ３は、第１上側絞り部４０Ｂ１と比べて筒部３８の開口面積が縮小する勾配が大きくなるように、その形状が設定されている。 Further, on the vehicle rear side of the flat portion 40B2, there is provided a second upper narrowed portion 40B3 formed so as to be continuous with the flat portion 40B2 and reduce the opening area of the tubular portion 38 toward the vehicle rear side. ing. The shape of the second upper narrowing portion 40B3 is set so that the gradient of the opening area of the tubular portion 38 is larger than that of the first upper narrowing portion 40B1.
さらに、第２上側絞り部４０Ｂ３の車両後方側には、当該第２上側絞り部４０Ｂ３と連続して車両後方側に向かって筒部３８の開口面積が縮小されるように形成されると共に、排気管２４からの排気流Ｗを受ける上側受け面部４０Ｂ４が設けられている。別の見方をすれば、上側受け面部４０Ｂ４は、車両幅方向に見た断面視で、排気管２４の排気流Ｗの流路６０が車両後方側に向かって狭まる方向に傾斜している。この上側受け面部４０Ｂ４は、車両幅方向に見た断面視で、第１上側絞り部４０Ｂ１と比べて勾配が大きくなるように、かつ第２上側絞り部４０Ｂ３と比べて勾配が小さくなるように、その形状が設定されている。 Further, on the vehicle rear side of the second upper throttle portion 40B3, the opening area of the tubular portion 38 is formed continuously with the second upper throttle portion 40B3 toward the vehicle rear side, and the exhaust gas is formed. An upper receiving surface portion 40B4 for receiving the exhaust flow W from the pipe 24 is provided. From another perspective, the upper receiving surface portion 40B4 is inclined in a direction in which the flow passage 60 of the exhaust flow W of the exhaust pipe 24 narrows toward the vehicle rear side in a cross-sectional view as seen in the vehicle width direction. The upper receiving surface portion 40B4 has a larger gradient than that of the first upper throttle portion 40B1 and a smaller gradient than that of the second upper throttle portion 40B3 in a sectional view as seen in the vehicle width direction. The shape is set.
そして、上側受け面部４０Ｂ４の車両後方側には、当該上側受け面部４０Ｂ４と連続して、当該上側受け面部４０Ｂ４の車両後方側の端部から筒部３８の外周側でかつ車両後方側に延出された上側剥離面部４０Ｂ５が設けられている。別の見方をすれば、上側剥離面部４０Ｂ５は、車両幅方向に見た断面視で排気管２４の排気流Ｗの流路６０が車両後方側に向かって拡がる方向に傾斜して設けられている。つまり、上側受け面部４０Ｂ４と上側剥離面部４０Ｂ５とで形成される断面は、筒部３８の内周側に凸となっており、これは、上側構成部４０に筒部３８の内周に沿った凸部が形成されていると捉えることもできる。また、上記構成の上側受け面部４０Ｂ４及び上側剥離面部４０Ｂ５に向かって排出される排気流Ｗは、上側受け面部４０Ｂ４と上側剥離面部４０Ｂ５との境界部において剥離されるため、当該境界部は排気流Ｗの剥離点Ｐ１と見なすことができる。なお、後述するように、上側剥離面部４０Ｂ５の車両後方側の部分には、開口縁部３０が取り付けられており、当該上側剥離面部４０Ｂ５は、開口縁部３０よりも車両前方側に配置された状態となっている。 Then, on the vehicle rear side of the upper side receiving surface portion 40B4, continuously from the upper side receiving surface portion 40B4, extends from the vehicle rear side end of the upper side receiving surface portion 40B4 to the outer peripheral side of the tubular portion 38 and to the vehicle rear side. The upper peeling surface portion 40B5 is provided. From another perspective, the upper separation surface portion 40B5 is provided so as to be inclined in a direction in which the flow passage 60 of the exhaust flow W of the exhaust pipe 24 expands toward the vehicle rear side in a cross-sectional view seen in the vehicle width direction. .. That is, the cross section formed by the upper receiving surface portion 40B4 and the upper peeling surface portion 40B5 is convex toward the inner peripheral side of the tubular portion 38, which is along the inner periphery of the tubular portion 38 in the upper constituent portion 40. It can be considered that a convex portion is formed. Further, since the exhaust flow W discharged toward the upper receiving surface portion 40B4 and the upper separating surface portion 40B5 having the above-described configuration is separated at the boundary portion between the upper receiving surface portion 40B4 and the upper separating surface portion 40B5, the boundary portion is exhaust flow. It can be regarded as the peeling point P1 of W. As will be described later, the opening edge portion 30 is attached to the vehicle rear side portion of the upper peeling surface portion 40B5, and the upper peeling surface portion 40B5 is arranged on the vehicle front side of the opening edge portion 30. It is in a state.
一方、下側構成部４２を構成する下側半円筒部４２Ａは、その内径が車両後方側に向かって緩やかに縮径されるように形成されており、これにより、上述の如く円筒部３８Ａが車両後方側に向かって縮径されるようになっている。また、下側半円筒部４２Ａの車両後方側には、当該下側半円筒部４２Ａと連続して車両後方側に向かって筒部３８の開口面積が縮小されるように形成されると共に、排気管２４からの排気流Ｗを受ける下側受け面部４２Ｂ１が設けられている。別の見方をすれば、下側受け面部４２Ｂ１は、上側受け面部４０Ｂ４と同様に、車両幅方向に見た断面視で、排気管２４の排気流Ｗの流路６０が車両後方側に向かって狭まる方向に傾斜している。なお、上側受け面部４０Ｂ４は、車両幅方向に見た断面視で直線的に傾斜しているのに対し、下側受け面部４２Ｂ１は、車両幅方向に見た断面視で車両後方側に凸となるように湾曲して傾斜している。 On the other hand, the lower semi-cylindrical portion 42A that constitutes the lower component portion 42 is formed such that the inner diameter thereof is gradually reduced toward the vehicle rear side, whereby the cylindrical portion 38A is formed as described above. The diameter is reduced toward the rear side of the vehicle. Further, the lower semi-cylindrical portion 42A is formed on the vehicle rear side such that the opening area of the tubular portion 38 is reduced toward the vehicle rear side continuously with the lower semi-cylindrical portion 42A, and the exhaust gas is exhausted. A lower receiving surface portion 42B1 for receiving the exhaust flow W from the pipe 24 is provided. From a different point of view, the lower receiving surface portion 42B1 is similar to the upper receiving surface portion 40B4 in that the flow path 60 of the exhaust flow W of the exhaust pipe 24 is directed toward the vehicle rear side in a cross-sectional view as seen in the vehicle width direction. It is inclined in the direction of narrowing. The upper receiving surface portion 40B4 is linearly inclined in a sectional view as seen in the vehicle width direction, whereas the lower receiving surface portion 42B1 is convex toward the vehicle rear side in a sectional view as seen in the vehicle width direction. It is curved and inclined so that.
そして、下側受け面部４２Ｂ１の車両後方側には、当該下側受け面部４２Ｂ１と連続して、当該下側受け面部４２Ｂ１の車両後方側の端部から筒部３８の外周側でかつ車両後方側に延出された下側剥離面部４２Ｂ２が設けられている。別の見方をすれば、下側剥離面部４２Ｂ２は、上側剥離面部４０Ｂ５と同様に、車両幅方向に見た断面視で排気管２４の排気流Ｗの流路６０が車両後方側に向かって拡がる方向に傾斜して設けられている。なお、上記構成の下側受け面部４２Ｂ１及び下側剥離面部４２Ｂ２は、流路６０に面するバッフル２８の下側内面部２８Ａを構成していると捉えることもできる。 Then, on the vehicle rear side of the lower receiving surface portion 42B1, in succession to the lower receiving surface portion 42B1, from the vehicle rear end of the lower receiving surface portion 42B1 to the outer peripheral side of the tubular portion 38 and on the vehicle rear side. A lower peeling surface portion 42B2 extending to the bottom is provided. From a different point of view, the lower separation surface portion 42B2, like the upper separation surface portion 40B5, has the passage 60 of the exhaust flow W of the exhaust pipe 24 that widens toward the vehicle rear side in a cross-sectional view as seen in the vehicle width direction. It is provided to be inclined in the direction. It should be noted that the lower receiving surface portion 42B1 and the lower peeling surface portion 42B2 having the above-described configurations can be regarded as constituting the lower inner surface portion 28A of the baffle 28 that faces the flow path 60.
また、下側受け面部４２Ｂ１及び下側剥離面部４２Ｂ２に向かって排出される排気流Ｗは、下側受け面部４２Ｂ１と下側剥離面部４２Ｂ２との境界部において剥離されるため、当該境界部は排気流Ｗの剥離点Ｐ２と見なすことができる。この剥離点Ｐ２は、その車両上下方向の位置が排気管２４の排気口２６における下端部の車両上下方向の位置と一致しており、換言すれば、当該下端部の車両上下方向の位置と下側内面部２８Ａの頂部（車両上下方向で最も高い位置）とが一致している。 Further, since the exhaust flow W discharged toward the lower receiving surface portion 42B1 and the lower separating surface portion 42B2 is separated at the boundary portion between the lower receiving surface portion 42B1 and the lower separating surface portion 42B2, the boundary portion is exhausted. It can be regarded as the separation point P2 of the stream W. The position of the separation point P2 in the vehicle vertical direction coincides with the position of the lower end portion of the exhaust port 24 of the exhaust pipe 24 in the vehicle vertical direction. In other words, the peeling point P2 is located below the position of the lower end portion in the vehicle vertical direction. The top of the side inner surface portion 28A (the highest position in the vehicle vertical direction) is aligned.
さらに、下側剥離面部４２Ｂ２の車両後方側には、当該下側剥離面部４２Ｂ２と連続して車両後方側に延出された取付面部４２Ｂ３が設けられており、当該取付面部４２Ｂ３には、後述するように、開口縁部３０が取り付けられている。なお、車両幅方向に見た断面視において、下側受け面部４２Ｂ１が上側受け面部４０Ｂ４よりも車両前方側に配置されると共に、下側剥離面部４２Ｂ２が上側剥離面部４０Ｂ５よりも車両前方側に配置されている。 Further, on the vehicle rear side of the lower release surface portion 42B2, a mounting surface portion 42B3 that is continuous with the lower release surface portion 42B2 and extends toward the vehicle rear side is provided, and the mounting surface portion 42B3 will be described later. As such, the opening edge 30 is attached. In the cross-sectional view seen in the vehicle width direction, the lower receiving surface portion 42B1 is arranged on the vehicle front side of the upper receiving surface portion 40B4, and the lower peeling surface portion 42B2 is arranged on the vehicle front side of the upper peeling surface portion 40B5. Has been done.
また、図２に示されるように、上側構成部４０には、その車両幅方向両端部に沿って車両前後方向に延在する一対の上側フランジ部４０Ｃが形成されている。一方、下側構成部４２には、その車両幅方向両端部に沿って車両前後方向に延在する一対の下側フランジ部４２Ｃが形成されている。そして、上側フランジ部４０Ｃと下側フランジ部４２Ｃとがスポット溶接等によって接合されることで筒部３８が構成されている。 Further, as shown in FIG. 2, the upper component 40 is formed with a pair of upper flanges 40C extending in the vehicle front-rear direction along both ends of the vehicle width direction. On the other hand, the lower component portion 42 is formed with a pair of lower flange portions 42C extending in the vehicle front-rear direction along the vehicle width direction both ends. Then, the upper flange portion 40C and the lower flange portion 42C are joined by spot welding or the like to form the tubular portion 38.
一方、上側ブラケット３２は、当該上側ブラケット３２の車両上方側を構成する取付壁部３２Ａと当該上側ブラケット３２の車両下方側を構成する接合壁部３２Ｂとを含んで構成されている。取付壁部３２Ａは、板厚方向を車両前後方向とされて車両幅方向に延在する矩形板状に形成されており、その車両幅方向内側には正方形状の内側被挿通部４６が、その車両幅方向内側には長方形状の外側被挿通部４８が形成されている。一方、接合壁部３２Ｂは、取付壁部３２Ａの車両下方側の端部から車両前方下側に延出されて、その先端部が筒部３８の平坦部４０Ｂ２に接合されている。 On the other hand, the upper bracket 32 is configured to include a mounting wall portion 32A that constitutes the vehicle upper side of the upper bracket 32 and a joining wall portion 32B that constitutes the vehicle lower side of the upper bracket 32. The mounting wall portion 32A is formed in a rectangular plate shape extending in the vehicle width direction with the plate thickness direction as the vehicle front-rear direction, and the square inner insertion portion 46 is formed inside the vehicle width direction. A rectangular outer insertion portion 48 is formed on the inner side in the vehicle width direction. On the other hand, the joint wall portion 32B extends from the end portion of the attachment wall portion 32A on the vehicle lower side toward the vehicle front lower side, and the tip portion thereof is joined to the flat portion 40B2 of the tubular portion 38.
内側ブラケット３４は、板厚方向を車両前後方向とされて車両幅方向に延在する矩形板状の取付壁部３４Ａと、板厚方向を車両上下方向とされて取付壁部３４Ａから車両後方側に延出された接合壁部３４Ｂとを含んで構成されている。そして、内側ブラケット３４は、接合壁部３４Ｂが車両幅方向内側の下側フランジ部４２Ｃにスポット溶接等によって接合されることで筒部３８に対して固定されている。なお、取付壁部３４Ａの車両幅方向内側の端部には、長孔状の被挿通部５０が形成されており、取付壁部３４Ａの固定に用いられている。 The inner bracket 34 has a rectangular plate-shaped mounting wall portion 34A extending in the vehicle width direction with the plate thickness direction being the vehicle front-rear direction, and a vehicle rear side from the mounting wall portion 34A having the plate thickness direction being the vehicle vertical direction. And a joint wall portion 34B extended to the. The inner bracket 34 is fixed to the tubular portion 38 by joining the joint wall portion 34B to the lower flange portion 42C on the inner side in the vehicle width direction by spot welding or the like. A long hole-shaped insertion portion 50 is formed at an end portion of the mounting wall portion 34A on the inner side in the vehicle width direction, and is used for fixing the mounting wall portion 34A.
外側ブラケット３６は、板厚方向を車両前後方向とされて車両幅方向に延在する矩形板状の取付壁部３６Ａと、板厚方向を車両上下方向とされて取付壁部３６Ａから車両後方側に延出された接合壁部３６Ｂとを含んで構成されている。そして、外側ブラケット３６は、接合壁部３６Ｂが車両幅方向外側の下側フランジ部４２Ｃにスポット溶接等によって接合されることで筒部３８に対して固定されている。なお、取付壁部３６Ａの車両幅方向内側の端部には、円形の被挿通部５２が形成されており、取付壁部３６Ａの固定に用いられている。 The outer bracket 36 includes a rectangular plate-shaped mounting wall portion 36A extending in the vehicle width direction with the plate thickness direction being the vehicle front-rear direction, and a vehicle rear side from the mounting wall portion 36A having the plate thickness direction being the vehicle vertical direction. And the joint wall portion 36B extended to the. The outer bracket 36 is fixed to the tubular portion 38 by joining the joint wall portion 36B to the lower flange portion 42C on the vehicle width direction outer side by spot welding or the like. A circular insertion portion 52 is formed at an end portion of the mounting wall portion 36A on the inner side in the vehicle width direction, and is used for fixing the mounting wall portion 36A.
上述した上側ブラケット３２及び内側ブラケット３４は、それぞれプッシュリベット５４及びタッピンネジ５６を用いてバンパカバー１４に固定されており、ここでは一例として上側ブラケット３２の外側被挿通部４８側の固定について説明する。図３に詳しく示されるように、バンパカバー本体部１６のフランジ部１６Ｅには、外側被挿通部４８に対応する被挿通部５８が形成されている。そして、外側被挿通部４８と被挿通部５８との車両上下方向の位置が合わされた状態でプッシュリベット５４が外側被挿通部４８及び被挿通部５８に挿通されると共に、当該プッシュリベット５４にタッピンネジ５６が螺入される。これにより、プッシュリベット５４でフランジ部１６Ｅ及び取付壁部３２Ａが押圧されてフランジ部１６Ｅと取付壁部３２Ａとの相対移動が規制され、その結果、バッフル２８がバンパカバー１４に対して固定されている。 The upper bracket 32 and the inner bracket 34 described above are fixed to the bumper cover 14 using the push rivet 54 and the tapping screw 56, respectively. Here, the fixing of the upper bracket 32 on the outer inserted portion 48 side will be described as an example. As shown in detail in FIG. 3, the flanged portion 16</b>E of the bumper cover body 16 is formed with an inserted portion 58 corresponding to the outer inserted portion 48. Then, the push rivet 54 is inserted into the outer inserted portion 48 and the inserted portion 58 while the outer inserted portion 48 and the inserted portion 58 are aligned with each other in the vehicle vertical direction, and a tapping screw is attached to the push rivet 54. 56 is screwed in. Thereby, the flange portion 16E and the mounting wall portion 32A are pressed by the push rivet 54 to restrict the relative movement between the flange portion 16E and the mounting wall portion 32A, and as a result, the baffle 28 is fixed to the bumper cover 14. There is.
なお、本実施形態では、上側ブラケット３２の外側被挿通部４８が長方形状に形成されているため、バッフル２８及びバンパカバー１４の製造誤差を吸収して、バッフル２８をバンパカバー１４に対して位置合わせすることが可能となっている。また、外側ブラケット３６は、上側ブラケット３２及び内側ブラケット３４と異なり、取付壁部３６Ａに形成された被挿通部５２に図示しないクリップが挿入されることでバンパカバー１４に固定されている。 In the present embodiment, since the outer insertion portion 48 of the upper bracket 32 is formed in a rectangular shape, the manufacturing error of the baffle 28 and the bumper cover 14 is absorbed, and the baffle 28 is positioned with respect to the bumper cover 14. It is possible to match. Further, unlike the upper bracket 32 and the inner bracket 34, the outer bracket 36 is fixed to the bumper cover 14 by inserting a clip (not shown) into the inserted portion 52 formed in the mounting wall portion 36A.
一方、開口縁部３０は、図１及び図２に示されるように、拡張部３８Ｂの車両後方側の開口端部３８Ｂ１に沿って形成されており、車両後方側から見て上辺が下辺よりも車両幅方向内側に配置された平行四辺形状を成している。この開口縁部３０は、その車両上方側を構成する上枠部３０Ａと、その車両下方側を構成する下枠部３０Ｂとが車両幅方向に延在しており、その車両幅方向両側を構成する縦枠部３０Ｃが車両上下方向に延在している。そして、上枠部３０Ａ、下枠部３０Ｂ及び縦枠部３０Ｃは、それぞれの延在方向と直交する方向に切った断面形状が、車両前方側に開放されたＣ字状とされている。さらに、下枠部３０Ｂは、上枠部３０Ａよりも車両前方側に配置されると共に、上枠部３０Ａよりも車両上下方向に扁平して形成されている。 On the other hand, as shown in FIGS. 1 and 2, the opening edge portion 30 is formed along the opening end portion 38B1 on the vehicle rear side of the expansion portion 38B, and the upper side when viewed from the vehicle rear side is higher than the lower side. It has a parallelogram shape arranged on the inner side in the vehicle width direction. The opening edge portion 30 has an upper frame portion 30A forming the vehicle upper side and a lower frame portion 30B forming the vehicle lower side extending in the vehicle width direction, and forming both sides in the vehicle width direction. The vertical frame portion 30C that extends extends in the vehicle vertical direction. The upper frame portion 30A, the lower frame portion 30B, and the vertical frame portion 30C have a C-shaped cross-section that is cut in a direction orthogonal to the extending direction of the upper frame portion 30A, the lower frame portion 30B, and the vertical frame portion 30C. Further, the lower frame portion 30B is arranged on the vehicle front side with respect to the upper frame portion 30A and is formed to be flatter in the vehicle vertical direction than the upper frame portion 30A.
また、開口縁部３０は、その外周側を構成する外周壁部３０Ｄがバンパカバー１４の開口部２２の周縁部２２Ａに沿って当該周縁部２２Ａと所定の間隔をあけた状態で配置されている。そして、開口縁部３０は、外周壁部３０Ｄの車両下方側の部分が車両下方側から見て露出された状態となっている。 In addition, the opening edge portion 30 is arranged such that an outer peripheral wall portion 30D that forms the outer peripheral side thereof is spaced apart from the peripheral edge portion 22A by a predetermined distance along the peripheral edge portion 22A of the opening portion 22 of the bumper cover 14. .. The opening edge portion 30 is in a state in which a portion of the outer peripheral wall portion 30D on the vehicle lower side is exposed when viewed from the vehicle lower side.
一方、開口縁部３０の内周側を構成する内周壁部３０Ｅは、その上枠部３０Ａ及び車両幅方向外側の縦枠部３０Ｃを構成する部分が上側剥離面部４０Ｂ５における筒部３８の内周側に配置されて、当該上側剥離面部４０Ｂ５にスポット溶接等によって接合されている。また、内周壁部３０Ｅの下枠部３０Ｂ及び車両幅方向内側の縦枠部３０Ｃを構成する部分は、取付面部４２Ｂ３における筒部３８の内周側に配置されて、当該取付面部４２Ｂ３にスポット溶接等によって接合されている。 On the other hand, in the inner peripheral wall portion 30E forming the inner peripheral side of the opening edge portion 30, the portions forming the upper frame portion 30A and the vertical frame portion 30C on the vehicle width direction outer side are the inner periphery of the tubular portion 38 in the upper peeling surface portion 40B5. It is arranged on the side and is joined to the upper peeling surface portion 40B5 by spot welding or the like. Further, the portions forming the lower frame portion 30B of the inner peripheral wall portion 30E and the vertical frame portion 30C on the inner side in the vehicle width direction are arranged on the inner peripheral side of the tubular portion 38 in the mounting surface portion 42B3 and spot-welded to the mounting surface portion 42B3. Are joined by etc.
上述した内周壁部３０Ｅのうち上側剥離面部４０Ｂ５に接合された部分は、上側剥離面部４０Ｂ５の一部を構成していると捉えることもできる。また、内周壁部３０Ｅのうち取付面部４２Ｂ３に接合された部分は、当該取付面部４２Ｂ３と隣接する下側剥離面部４２Ｂ２の一部を構成していると捉えることもできる。なお、上記のように開口縁部３０の構成を見なしたとしても、上側剥離面部４０Ｂ５及び下側剥離面部４２Ｂ２が、開口縁部３０の車両後方側の端部を構成する後端壁部３０Ｆよりも車両前方側に配置されていることには変わりはない。 The portion of the inner peripheral wall portion 30E described above that is joined to the upper peeling surface portion 40B5 can be regarded as forming a part of the upper peeling surface portion 40B5. In addition, the portion of the inner peripheral wall portion 30E that is joined to the mounting surface portion 42B3 can be regarded as forming a part of the lower peeling surface portion 42B2 that is adjacent to the mounting surface portion 42B3. Even if the configuration of the opening edge portion 30 is considered as described above, the upper peeling surface portion 40B5 and the lower peeling surface portion 42B2 configure the rear end wall portion 30F that constitutes the vehicle rear end portion of the opening edge portion 30. There is no change in that it is arranged on the front side of the vehicle.
また、上述の如く構成された開口縁部３０を備えたバッフル２８は、バンパカバー１４に取り付けられた状態において、傾斜壁部１６Ｂで構成された開口部２２周りの意匠面２０よりも車両後方側に開口縁部３０がその全周に亘って突出した状態となっている。一方で、開口縁部３０は、バッフル２８がバンパカバー１４に取り付けられた状態において、意匠面２０のうち後壁部１６Ａで構成された部分よりも車両後方側には突出しないように構成されている。 Further, the baffle 28 having the opening edge portion 30 configured as described above, when mounted on the bumper cover 14, is on the vehicle rear side with respect to the design surface 20 around the opening portion 22 formed of the inclined wall portion 16B. Further, the opening edge portion 30 is in a state of protruding over the entire circumference. On the other hand, the opening edge portion 30 is configured so as not to project toward the vehicle rear side with respect to the portion formed by the rear wall portion 16A of the design surface 20 when the baffle 28 is attached to the bumper cover 14. There is.
（本実施形態の作用及び効果）
次に、本実施形態の作用並びに効果を説明する。
(Operation and effect of this embodiment)
Next, the operation and effect of this embodiment will be described.
本実施形態では、車両幅方向に延在するバンパカバー１４が車両後部１２の後端部１２Ａに配置されており、当該バンパカバー１４のバンパカバー本体部１６における車両後方外側に面する意匠面２０によって車両後部１２の外観意匠の一部が構成されている。また、バンパカバー本体部１６には開口部２２が形成されており、当該開口部２２は、排気管２４の排気口２６から排出される排気流Ｗの流路６０における下流側に配置されている。そして、バッフル２８の開口縁部３０が、バンパカバー１４における開口部２２の周縁部２２Ａに沿って配置されている。このため、排気管２４からの排気流Ｗは、バッフル２８の開口縁部３０から車両後方外側に向かって排出されていく。 In the present embodiment, the bumper cover 14 extending in the vehicle width direction is arranged at the rear end portion 12A of the vehicle rear portion 12, and the design surface 20 of the bumper cover body portion 16 of the bumper cover 14 facing the vehicle rear outside 20. A part of the exterior design of the vehicle rear portion 12 is constituted by. An opening 22 is formed in the bumper cover body 16, and the opening 22 is arranged on the downstream side in the flow path 60 of the exhaust flow W discharged from the exhaust port 26 of the exhaust pipe 24. .. The opening edge portion 30 of the baffle 28 is arranged along the peripheral edge portion 22A of the opening portion 22 of the bumper cover 14. Therefore, the exhaust flow W from the exhaust pipe 24 is discharged from the opening edge portion 30 of the baffle 28 toward the vehicle rear outer side.
ところで、バッフル２８の開口縁部３０の位置がバンパカバー１４の意匠面２０よりも車両前方側に設定されていると、開口縁部３０から排出された排気流Ｗが意匠面２０に当たることで意匠面２０が汚れることがある。 By the way, when the position of the opening edge portion 30 of the baffle 28 is set to the vehicle front side with respect to the design surface 20 of the bumper cover 14, the exhaust flow W discharged from the opening edge portion 30 hits the design surface 20 so that the design is achieved. The surface 20 may become dirty.
ここで、本実施形態では、バッフル２８の開口縁部３０がバンパカバー本体部１６における開口部２２周りの意匠面２０よりも車両後方側に突出している。このため、排気管２４からの排気流Ｗは、バンパカバー本体部１６における開口部２２周りの意匠面２０よりも車両後方側の位置で、バッフル２８の開口縁部３０から排出される。その結果、排気管２４からの排気流Ｗは、バンパカバー本体部１６における開口部２２周りの意匠面２０から離れた位置に排出されるようになる。従って、本実施形態では、排気流Ｗによるバンパカバー１４への汚れの付着を抑制することができる。 Here, in the present embodiment, the opening edge portion 30 of the baffle 28 projects toward the vehicle rear side from the design surface 20 around the opening portion 22 of the bumper cover body portion 16. Therefore, the exhaust flow W from the exhaust pipe 24 is discharged from the opening edge 30 of the baffle 28 at a position on the vehicle rear side of the design surface 20 around the opening 22 in the bumper cover body 16. As a result, the exhaust flow W from the exhaust pipe 24 is discharged to a position apart from the design surface 20 around the opening 22 in the bumper cover body 16. Therefore, in the present embodiment, it is possible to suppress the attachment of dirt to the bumper cover 14 due to the exhaust flow W.
また、本実施形態では、バッフル２８の車両上方側の部分に向かって排出される排気流Ｗが、排気管２４の排気口２６の車両後方側に配置された上側受け面部４０Ｂ４に受けられ、排気流Ｗが上側受け面部４０Ｂ４に沿って車両後方側に排出されていく。一方、上側受け面部４０Ｂ４の車両後方側には、上側受け面部４０Ｂ４と連続し、かつ開口縁部３０の車両後方側の後端壁部３０Ｆ部よりも車両前方側に配置された上側剥離面部４０Ｂ５が設けられている。そして、上側受け面部４０Ｂ４は排気流Ｗの流路６０が車両後方側に向かって狭まる方向に傾斜しており、上側剥離面部４０Ｂ５は流路６０が車両後方側に向かって拡がる方向に傾斜している。このため、上側受け面部４０Ｂ４に沿って排出される排気流Ｗは、上側受け面部４０Ｂ４と上側剥離面部４０Ｂ５との境界部を通過するときに、流速が速くなり、圧力は低下する。その結果、排気流Ｗは、上側受け面部４０Ｂ４と上側剥離面部４０Ｂ５との境界部を剥離点Ｐ１としてバッフル２８から剥離し、上側剥離面部４０Ｂ５と剥離した状態でバッフル２８の開口縁部３０の車両後方側に排出されていく。従って、本実施形態では、排気管２４からの排気流Ｗをバンパカバー本体部１６の意匠面２０から離れていくように整流することができる。 Further, in the present embodiment, the exhaust flow W discharged toward the vehicle upper side portion of the baffle 28 is received by the upper side receiving surface portion 40B4 arranged on the vehicle rear side of the exhaust port 26 of the exhaust pipe 24, and exhausted. The flow W is discharged toward the vehicle rear side along the upper receiving surface portion 40B4. On the other hand, on the vehicle rear side of the upper receiving surface portion 40B4, the upper peeling surface portion 40B5 which is continuous with the upper receiving surface portion 40B4 and is arranged on the vehicle front side of the vehicle rear side rear end wall portion 30F of the opening edge portion 30. Is provided. The upper receiving surface portion 40B4 is inclined in a direction in which the flow passage 60 of the exhaust flow W narrows toward the vehicle rear side, and the upper separation surface portion 40B5 is inclined in a direction in which the flow passage 60 expands toward the vehicle rear side. There is. Therefore, when the exhaust flow W discharged along the upper receiving surface portion 40B4 passes through the boundary portion between the upper receiving surface portion 40B4 and the upper separating surface portion 40B5, the flow velocity becomes faster and the pressure decreases. As a result, the exhaust flow W is separated from the baffle 28 at the boundary point between the upper receiving surface portion 40B4 and the upper separation surface portion 40B5 as the separation point P1 and separated from the upper separation surface portion 40B5 by the vehicle at the opening edge portion 30 of the baffle 28. It is discharged to the rear side. Therefore, in the present embodiment, the exhaust flow W from the exhaust pipe 24 can be rectified so as to move away from the design surface 20 of the bumper cover body 16.
さらに、本実施形態では、排気管２４の排気口２６における下端部の車両上下方向の位置とバッフル２８の車両下方側を構成しかつ排気流Ｗの流路６０に面する下側内面部２８Ａにおける車両上下方向で最も高い位置とが一致している。このため、排気流Ｗとバッフル２８の下側内面部２８Ａとの接触面積を小さくして当該排気流Ｗがバッフル２８から受ける抵抗を小さくすることができると共に、バッフル２８から排出されていく排気流Ｗを整流することができる。その結果、本実施形態では、排気管２４からの排気流Ｗの乱れを抑制し、排気流Ｗを安定した状態で車両後方側に排出することができる。 Further, in the present embodiment, the lower inner surface portion 28A that constitutes the vehicle vertical direction position of the lower end portion of the exhaust port 26 of the exhaust pipe 24 and the vehicle lower side of the baffle 28 and faces the flow passage 60 of the exhaust flow W is provided. The highest position in the vertical direction of the vehicle matches. Therefore, the contact area between the exhaust flow W and the lower inner surface portion 28A of the baffle 28 can be reduced to reduce the resistance that the exhaust flow W receives from the baffle 28, and the exhaust flow discharged from the baffle 28 can be reduced. W can be rectified. As a result, in the present embodiment, the turbulence of the exhaust flow W from the exhaust pipe 24 can be suppressed, and the exhaust flow W can be discharged to the vehicle rear side in a stable state.
加えて、本実施形態では、上側受け面部４０Ｂ４と上側剥離面部４０Ｂ５との境界部よりも下側受け面部４２Ｂ１と下側剥離面部４２Ｂ２との境界部の方が車両前方側に位置している。このため、排気管２４からの排気流Ｗの車両下方側の剥離点Ｐ２は、排気流Ｗの車両上方側の剥離点Ｐ１よりも車両前方側となる。その結果、排気管２４からの排気流Ｗは、先に車両下方側で剥離し、次いで車両上方側で剥離することとなり、図４に示されるように、排気流Ｗがバッフルから排出されるときには、当該排気流Ｗは車両下方側に向けて排出される。これは、車両１０が走行中であっても停車中であっても同様である。従って、本実施形態では、排気管２４からの排気流Ｗの向きを車両下方側に整流し、当該排気流Ｗがバンパカバー本体部１６の意匠面２０に付着することを抑制することができる。 In addition, in the present embodiment, the boundary portion between the lower receiving surface portion 42B1 and the lower peeling surface portion 42B2 is located on the vehicle front side rather than the boundary portion between the upper receiving surface portion 40B4 and the upper peeling surface portion 40B5. Therefore, the separation point P2 on the vehicle lower side of the exhaust flow W from the exhaust pipe 24 is on the vehicle front side than the separation point P1 on the vehicle upper side of the exhaust flow W. As a result, the exhaust flow W from the exhaust pipe 24 is first separated on the vehicle lower side and then separated on the vehicle upper side, and as shown in FIG. 4, when the exhaust flow W is discharged from the baffle. The exhaust flow W is discharged toward the lower side of the vehicle. This is the same whether the vehicle 10 is running or stopped. Therefore, in the present embodiment, the direction of the exhaust flow W from the exhaust pipe 24 can be rectified to the vehicle lower side, and the exhaust flow W can be suppressed from adhering to the design surface 20 of the bumper cover body 16.
しかも、排気流Ｗがバッフル２８から剥離されることで、バッフル２８が排気流Ｗから受ける熱量が低減される。その結果、バッフル２８のバンパカバー１４への取り付けにおいて、バンパカバー本体部１６のフランジ部１６Ｅと上側ブラケット３２の取付壁部３２Ａとの間にワッシャー等を入れて、バッフル２８からの熱を放熱する必要がなくなる。 Moreover, since the exhaust flow W is separated from the baffle 28, the amount of heat that the baffle 28 receives from the exhaust flow W is reduced. As a result, when attaching the baffle 28 to the bumper cover 14, a washer or the like is inserted between the flange portion 16E of the bumper cover body 16 and the attachment wall portion 32A of the upper bracket 32 to radiate the heat from the baffle 28. There is no need.
さらに加えて、本実施形態では、バッフル２８の開口縁部３０が意匠面２０のうち後壁部１６Ａで構成された部分よりも車両後方側には突出しないように構成されているため、人が不意にバッフル２８に接触することを抑制することができる。 In addition, in the present embodiment, the opening edge portion 30 of the baffle 28 is configured so as not to project toward the vehicle rear side from the portion of the design surface 20 that is configured by the rear wall portion 16A, and Unexpected contact with the baffle 28 can be suppressed.
＜上記実施形態の補足説明＞
（１） 上述した実施形態では、排気管２４の排気口２６における下端部の車両上下方向の位置とバッフル２８の下側内面部２８Ａにおける車両上下方向で最も高い位置とが一致していたが、これに限らない。すなわち、排気管２４の位置を車両上下方向に変更してもよい。このような構成においても、排気流Ｗがバッフル２８から受ける抵抗に対する作用及び効果を除いて、上述した実施形態と同様の作用及び効果を奏する。
<Supplementary explanation of the above embodiment>
(1) In the above-described embodiment, the position of the lower end portion of the exhaust port 24 of the exhaust pipe 24 in the vehicle vertical direction and the highest position of the lower inner surface portion 28A of the baffle 28 in the vehicle vertical direction match. It is not limited to this. That is, the position of the exhaust pipe 24 may be changed in the vehicle vertical direction. Also in such a configuration, the same action and effect as those of the above-described embodiment are achieved, except for the action and effect on the resistance that the exhaust flow W receives from the baffle 28.
（２） また、上述した実施形態では、下側内面部２８Ａが下側受け面部４２Ｂ１及び下側剥離面部４２Ｂ２を含んで構成されているが、車両前後方向に一様に延在する平坦部によって構成されていてもよい。このような構成によっても、バッフル２８の車両下方側で排気流Ｗが剥離されることによる作用及び効果を除いて、上述した実施形態と同様の作用及び効果を奏する。 (2) Further, in the above-described embodiment, the lower inner surface portion 28A is configured to include the lower receiving surface portion 42B1 and the lower peeling surface portion 42B2, but by the flat portion that extends uniformly in the vehicle front-rear direction. It may be configured. With such a configuration as well, the same action and effect as those of the above-described embodiment are achieved, except for the action and effect due to the separation of the exhaust flow W on the vehicle lower side of the baffle 28.
（３） さらに、上述した実施形態では、開口縁部３０がその全周に亘って意匠面２０よりも車両後方側に突出した状態となっていたが、これに限らない。すなわち、開口縁部３０の少なくとも一部が意匠面２０よりも車両後方側に突出した状態となっていれば、排気流Ｗによるバンパカバー１４の汚れの抑制に一定の効果を奏する。 (3) Further, in the above-described embodiment, the opening edge portion 30 is in a state of protruding toward the vehicle rear side with respect to the design surface 20 over the entire circumference, but the present invention is not limited to this. That is, if at least a part of the opening edge portion 30 is projected to the vehicle rear side with respect to the design surface 20, there is a certain effect in suppressing the dirt of the bumper cover 14 due to the exhaust flow W.
（４） 加えて、上述した実施形態では、開口縁部３０が平行四辺形の枠状に構成されていたが、これに限らない。例えば、開口縁部３０を上枠部３０Ａに相当する部材と下枠部３０Ｂに相当する部材とに分割して構成してもよいし、開口縁部３０を上枠部３０Ａに相当する部材のみで構成してもよい。これらのような構成であっても、開口縁部３０の少なくとも一部が意匠面２０よりも車両後方側に突出した状態となっているため、排気流Ｗによるバンパカバー１４の汚れの抑制に一定の効果を奏する。 (4) In addition, in the above-described embodiment, the opening edge portion 30 is configured in the shape of a parallelogram, but the configuration is not limited to this. For example, the opening edge portion 30 may be configured by being divided into a member corresponding to the upper frame portion 30A and a member corresponding to the lower frame portion 30B, or only the member corresponding to the upper frame portion 30A. You may comprise. Even with such a configuration, since at least a part of the opening edge portion 30 projects toward the vehicle rear side with respect to the design surface 20, it is possible to suppress contamination of the bumper cover 14 due to the exhaust flow W to a certain extent. Produce the effect of.
１０ 車両
１２Ａ 後端部（車両後端部）
１４ バンパカバー
１６ バンパカバー本体部
２０ 意匠面
２２ 開口部
２２Ａ 周縁部
２４ 排気管
２６ 排気口
２８ バッフル
２８Ａ 下側内面部
３０ 開口縁部
３０Ｆ 後端壁部（開口縁部の車両後方側の端部）
４０Ｂ４ 上側受け面部
４０Ｂ５ 上側剥離面部
４２Ｂ１ 下側受け面部
４２Ｂ２ 下側剥離面部
６０ 流路
Ｗ 排気流
10 vehicle 12A rear end (vehicle rear end)
14 Bumper Cover 16 Bumper Cover Body 20 Design Surface 22 Opening 22A Peripheral 24 Exhaust Pipe 26 Exhaust 28 Baffle 28A Lower Inner Surface 30 Opening Edge 30F Rear End Wall (Vehicle Rear Side of Opening Edge) )
40B4 upper receiving surface portion 40B5 upper release surface portion 42B1 lower receiving surface portion 42B2 lower release surface portion 60 the passage W exhaust stream
Claims (3)
前記開口部の周縁部に沿って配置されると共に前記バンパカバー本体部における前記開口部周りの意匠面よりも車両後方側に突出した開口縁部と、当該開口縁部と別体とされると共に当該開口縁部の車両前方側に配置されて当該開口縁部と接合された筒部と、当該筒部に設けられた複数のブラケットと、を含んで構成され、当該ブラケットのみが前記バンパカバーに取り付けられたバッフルと、
を備え、
前記バッフルの車両上方側の部分には、前記排気口の車両後方側に配置されると共に車両幅方向に見た断面視で前記流路が車両後方側に向かって狭まる方向に傾斜し、かつ前記排気流を受ける上側受け面部と、当該上側受け面部の車両後方側で当該上側受け面部と連続し、かつ前記開口縁部の車両後方側の端部よりも車両前方側に配置されると共に車両幅方向に見た断面視で当該流路が車両後方側に向かって拡がる方向に傾斜した上側剥離面部と、が設けられている、
車両用バンパ構造 A bumper cover main body having a design surface facing the vehicle rear outer side, and an opening formed in the bumper cover main body and located downstream in the flow path of the exhaust flow discharged from the exhaust port of the exhaust pipe. A bumper cover that is configured to include, a bumper cover that is disposed at the vehicle rear end portion and that extends in the vehicle width direction,
An opening edge portion that is arranged along the peripheral edge portion of the opening portion and that projects toward the vehicle rear side with respect to the design surface around the opening portion of the bumper cover main body portion, and is separate from the opening edge portion. The bumper cover is configured to include a tubular portion disposed on the vehicle front side of the opening edge portion and joined to the opening edge portion, and a plurality of brackets provided in the tubular portion, and only the bracket is the bumper cover. With attached baffles,
Equipped with
A portion of the baffle on the vehicle upper side is disposed on the vehicle rear side of the exhaust port and is inclined in a direction in which the flow passage narrows toward the vehicle rear side in a cross-sectional view as seen in the vehicle width direction, and An upper side receiving surface portion that receives the exhaust flow, a vehicle rear side of the upper side receiving surface portion that is continuous with the upper side receiving surface portion, and is arranged on the vehicle front side with respect to the vehicle rear side end of the opening edge portion and the vehicle width. And an upper peeling surface portion inclined in a direction in which the flow path expands toward the vehicle rear side in a cross-sectional view seen in a direction,
Vehicle bumper structure
請求項１に記載の車両用バンパ構造。 The position of the lower end of the exhaust port in the vehicle up-down direction and the highest position in the vehicle up-down direction of the lower inner surface portion that constitutes the vehicle lower side of the baffle and faces the flow path are matched.
The vehicle bumper structure according to claim 1 .
請求項２に記載の車両用バンパ構造。 The vehicle lower side portion of the baffle, the flow path is a vehicle rear side as viewed in cross-section, wherein and a vehicle rear side of the exhaust port is disposed on the vehicle front side of the upper retaining surface seen Rutotomoni vehicle width direction The lower receiving surface portion that is inclined in a direction narrowing toward and that receives the exhaust flow, is continuous with the lower receiving surface portion on the vehicle rear side of the lower receiving surface portion, and is on the vehicle front side with respect to the upper peeling surface portion. a lower peel surface portion of the flow path is inclined in a direction extending toward the vehicle rear side, are provided viewed cross section in the arranged Rutotomoni vehicle width direction,
The bumper structure for vehicles according to claim 2 .
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