JP2021020482A - Power unit cover - Google Patents

Power unit cover Download PDF

Info

Publication number
JP2021020482A
JP2021020482A JP2019136206A JP2019136206A JP2021020482A JP 2021020482 A JP2021020482 A JP 2021020482A JP 2019136206 A JP2019136206 A JP 2019136206A JP 2019136206 A JP2019136206 A JP 2019136206A JP 2021020482 A JP2021020482 A JP 2021020482A
Authority
JP
Japan
Prior art keywords
power unit
sound absorbing
cover
absorbing member
hole
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP2019136206A
Other languages
Japanese (ja)
Other versions
JP6937801B2 (en
Inventor
康哲 渡辺
Yasutetsu Watanabe
康哲 渡辺
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Honda Motor Co Ltd
Original Assignee
Honda Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Honda Motor Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2019136206A priority Critical patent/JP6937801B2/en
Priority to CN202021322460.3U priority patent/CN214057421U/en
Publication of JP2021020482A publication Critical patent/JP2021020482A/en
Application granted granted Critical
Publication of JP6937801B2 publication Critical patent/JP6937801B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

To provide a power unit cover capable of achieving high acoustic insulation while suppressing an increase in thickness thereof.SOLUTION: A power unit cover 1 includes: a cover member 2 having a cover body 4 covering a power unit which is a drive source of a vehicle from at least one side of the vehicle in the vertical direction and a plurality of ribs 5 projecting toward the power unit side from the cover body 4; and a sound absorption member 3 arranged in between the power unit and the cover member 2 and formed with recessed parts 31 at positions corresponding to the ribs 5. The rib 5 is made to abut onto a bottom face 34 of the recessed part 31. A height dimension H2 of the rib 5 is formed to be larger than a depth dimension H1 of the recessed part 31. A space S is provided in between the sound absorption member 3 and the cover member 2 in between the plurality of ribs 5.SELECTED DRAWING: Figure 7

Description

本発明は、パワーユニットカバーに関するものである。 The present invention relates to a power unit cover.

従来、自動車においてエンジン音等の騒音を遮音するための技術が種々提案されている。 Conventionally, various techniques for insulating noise such as engine noise have been proposed in automobiles.

例えば特許文献１には、エンジンの下方を覆うアンダーカバーの上方に吸音部材が設けられたサイレンサーの構成が開示されている。吸音部材における吸音材の表面は、被覆材によって覆われている。特許文献１に記載の技術によれば、被覆材で覆うことにより吸音材が水や泥等の異物を吸い込むのを抑制し、吸音材の経年劣化を抑制できるとされている。 For example, Patent Document 1 discloses a configuration of a silencer in which a sound absorbing member is provided above an undercover that covers the lower part of the engine. The surface of the sound absorbing material in the sound absorbing member is covered with a covering material. According to the technique described in Patent Document 1, it is said that by covering with a covering material, it is possible to suppress the sound absorbing material from sucking in foreign substances such as water and mud, and to suppress the aged deterioration of the sound absorbing material.

特開２００２−８７１８０号公報JP-A-2002-87180

ここで、特許文献１に記載の技術にあっては、吸音材は発泡材であるため、エンジン等のパワーユニットで発生した大きな騒音を吸収するためには、吸音部材の厚みを厚くする必要がある。しかしながら、遮音性を向上するために吸音部材を厚くした場合は、パワーユニットを覆うパワーユニットカバー全体の厚みが厚くなるおそれがある。また、パワーユニットカバーの厚みが厚くなってパワーユニットカバーが車体の下方へ突出した場合、車体下方の空間を確保するために車高を高くする必要があり、これにより例えば車両のデザインが制限されるおそれがある。 Here, in the technique described in Patent Document 1, since the sound absorbing material is a foam material, it is necessary to increase the thickness of the sound absorbing member in order to absorb a large noise generated in a power unit such as an engine. .. However, if the sound absorbing member is made thicker in order to improve the sound insulation property, the thickness of the entire power unit cover covering the power unit may become thicker. In addition, if the power unit cover becomes thicker and the power unit cover protrudes downward from the vehicle body, it is necessary to increase the vehicle height in order to secure a space under the vehicle body, which may limit the design of the vehicle, for example. There is.

そこで、本発明は、厚みを抑制しつつ、遮音性を向上したパワーユニットカバーを提供することを目的とする。 Therefore, an object of the present invention is to provide a power unit cover having improved sound insulation while suppressing the thickness.

上記の課題を解決するため、請求項１に記載の発明に係るパワーユニットカバー（例えば、実施形態におけるパワーユニットカバー１）は、車両の駆動源であるパワーユニット（例えば、実施形態におけるエンジン１１）を前記車両の上下方向の少なくとも一方から覆うカバー本体（例えば、実施形態におけるカバー本体４）と、前記カバー本体から前記パワーユニット側へ突出する複数の凸部（例えば、実施形態における凸部５）と、を有するカバー部材（例えば、実施形態におけるカバー部材２）と、前記パワーユニットと前記カバー部材との間に配置され、前記凸部と対応する位置に凹部（例えば、実施形態における凹部３１）が形成された吸音部材（例えば、実施形態における吸音部材３）と、を備え、前記凸部は、前記凹部の底面（例えば、実施形態における底面３４）に当接し、前記凸部の高さ寸法（例えば、実施形態における高さ寸法Ｈ２）は、前記凹部の深さ寸法（例えば、実施形態における深さ寸法Ｈ１）よりも大きく形成され、複数の前記凸部同士の間において、前記吸音部材と前記カバー部材との間には隙間（例えば、実施形態における隙間Ｓ）が設けられていることを特徴としている。 In order to solve the above problems, the power unit cover according to the invention according to claim 1 (for example, the power unit cover 1 in the embodiment) uses the power unit (for example, the engine 11 in the embodiment) as a drive source of the vehicle. It has a cover main body (for example, the cover main body 4 in the embodiment) that covers from at least one of the vertical directions, and a plurality of convex portions (for example, the convex portion 5 in the embodiment) that protrude from the cover main body toward the power unit. Sound absorption that is arranged between the cover member (for example, the cover member 2 in the embodiment) and the power unit and the cover member, and a concave portion (for example, the concave portion 31 in the embodiment) is formed at a position corresponding to the convex portion. A member (for example, a sound absorbing member 3 in the embodiment) is provided, and the convex portion abuts on the bottom surface of the concave portion (for example, the bottom surface 34 in the embodiment), and the height dimension of the convex portion (for example, the embodiment). The height dimension H2) is formed to be larger than the depth dimension of the recess (for example, the depth dimension H1 in the embodiment), and the sound absorbing member and the cover member are formed between the plurality of convex portions. It is characterized in that a gap (for example, a gap S in the embodiment) is provided between them.

また、請求項２に記載の発明に係るパワーユニットカバーは、前記凸部はリブ（例えば、実施形態におけるリブ５）であることを特徴としている。 Further, the power unit cover according to the second aspect of the present invention is characterized in that the convex portion is a rib (for example, the rib 5 in the embodiment).

また、請求項３に記載の発明に係るパワーユニットカバーは、前記リブは、一対の縦リブ（例えば、実施形態における縦リブ２１）と、前記一対の縦リブと交差する一対の横リブ（例えば、実施形態における横リブ２２）と、を有し、前記吸音部材は、前記一対の縦リブ及び前記一対の横リブにより囲まれた枠部（例えば、実施形態における第一枠部２３、第二枠部２４）に配置される膨出部（例えば、実施形態における膨出部３５）を有することを特徴としている。 Further, in the power unit cover according to the third aspect of the present invention, the ribs include a pair of vertical ribs (for example, the vertical ribs 21 in the embodiment) and a pair of horizontal ribs intersecting the pair of vertical ribs (for example, the vertical ribs 21). The sound absorbing member has a horizontal rib 22) in the embodiment, and the sound absorbing member has a frame portion surrounded by the pair of vertical ribs and the pair of horizontal ribs (for example, the first frame portion 23 and the second frame in the embodiment). It is characterized by having a bulging portion (for example, a bulging portion 35 in the embodiment) arranged in the portion 24).

また、請求項４に記載の発明に係るパワーユニットカバーは、前記カバー本体は、前記吸音部材の周縁部（例えば、実施形態における周縁部３６）に対向する位置において前記吸音部材側に突出する突出部（例えば、実施形態における突出部１７）を有し、前記吸音部材は、前記突出部に溶着される溶着部（例えば、実施形態における溶着部３２）を有することを特徴としている。 Further, in the power unit cover according to the fourth aspect of the present invention, the cover body is a protruding portion protruding toward the sound absorbing member at a position facing the peripheral edge portion (for example, the peripheral edge portion 36 in the embodiment) of the sound absorbing member. (For example, the protruding portion 17 in the embodiment), and the sound absorbing member is characterized by having a welding portion (for example, the welding portion 32 in the embodiment) welded to the protruding portion.

また、請求項５に記載の発明に係るパワーユニットカバーは、前記カバー本体は、前記上下方向に貫通する第一貫通孔（例えば、実施形態における第一貫通孔１６）を有し、前記吸音部材は、前記上下方向に貫通する第二貫通孔（例えば、実施形態における第二貫通孔３３）を有し、前記第一貫通孔と前記第二貫通孔とは重なるように配置されることを特徴としている。 Further, in the power unit cover according to the invention of claim 5, the cover body has a first through hole (for example, the first through hole 16 in the embodiment) penetrating in the vertical direction, and the sound absorbing member is , The second through hole (for example, the second through hole 33 in the embodiment) that penetrates in the vertical direction is provided, and the first through hole and the second through hole are arranged so as to overlap each other. There is.

また、請求項６に記載の発明に係るパワーユニットカバーは、前記第二貫通孔の外周部に設けられた開口周辺部の上面は、前記第二貫通孔から外周部へ向かうにつれて前記第二貫通孔の内形が拡大するように傾斜していることを特徴としている。 Further, in the power unit cover according to the invention of claim 6, the upper surface of the opening peripheral portion provided on the outer peripheral portion of the second through hole is the second through hole as it goes from the second through hole to the outer peripheral portion. It is characterized by the fact that the inner shape of the is inclined so as to expand.

また、請求項７に記載の発明に係るパワーユニットカバーは、前記カバー本体は、前記車両の前後方向に延びる水平部（例えば、実施形態における水平部８）と、前記水平部の前端から上方に傾斜する傾斜部（例えば、実施形態における傾斜部９）と、を備え、前記傾斜部に設けられる前記凸部の前記車両の車幅方向における間隔（例えば、実施形態における間隔Ｌ２）は、前記水平部に設けられる前記凸部の前記車幅方向における間隔（例えば、実施形態における間隔Ｌ１Ａ）よりも狭いことを特徴としている。 Further, in the power unit cover according to the invention of claim 7, the cover body has a horizontal portion extending in the front-rear direction of the vehicle (for example, the horizontal portion 8 in the embodiment) and an upward inclination from the front end of the horizontal portion. The inclined portion (for example, the inclined portion 9 in the embodiment) and the interval (for example, the interval L2 in the embodiment) of the convex portion provided on the inclined portion in the vehicle width direction are the horizontal portion. It is characterized in that it is narrower than the distance (for example, the distance L1A in the embodiment) of the convex portion provided in the vehicle width direction.

また、請求項８に記載の発明に係るパワーユニットカバーは、前記カバー本体は、前記車両の車幅方向の両側に設けられる側壁部（例えば、実施形態における側壁部１８）と、前記車両の前後方向において前記側壁部の前方に設けられ、前記側壁部の下端部（例えば、実施形態における下端部１８ａ）から前記車幅方向の内側に延びるフランジ部（例えば、実施形態におけるフランジ部１９）と、を備え、前記カバー本体は、前記側壁部を介して前記車両の前記前後方向に延びるサイドメンバ（例えば、実施形態におけるサイドメンバ１２）に連結されていることを特徴としている。 Further, in the power unit cover according to the invention of claim 8, the cover main body has side wall portions (for example, side wall portions 18 in the embodiment) provided on both sides in the vehicle width direction of the vehicle and the vehicle front-rear direction. A flange portion (for example, a flange portion 19 in the embodiment) provided in front of the side wall portion and extending inward in the vehicle width direction from the lower end portion of the side wall portion (for example, the lower end portion 18a in the embodiment). The cover body is characterized in that it is connected to a side member (for example, a side member 12 in the embodiment) extending in the front-rear direction of the vehicle via the side wall portion.

また、請求項９に記載の発明に係るパワーユニットカバーは、前記吸音部材は、前記車幅方向から見て、前記サイドメンバと重なるように配置されることを特徴としている。 Further, the power unit cover according to the invention of claim 9 is characterized in that the sound absorbing member is arranged so as to overlap with the side member when viewed from the vehicle width direction.

本発明の請求項１に記載のパワーユニットカバーによれば、吸音部材は凹部を有し、吸音部材の凹部にはカバー部材の凸部が配置される。これにより、隣り合う凸部同士の間に吸音部材が入り込んで配置されるので、吸音部材の厚みを増加させつつパワーユニットカバー全体の厚みを抑えることができる。
凸部の高さ寸法は、凹部の深さ寸法よりも大きく形成されるので、凸部同士の間において、吸音部材とカバー部材との間に隙間を設けることができる。ここで、エンジン等のパワーユニットから発生した騒音は、先ず吸音部材に吸収され、さらに吸音部材を通り抜けた音が隙間内において吸音部材とカバー部材との間で繰り返し反射しながら吸音部材に吸収される。よって、吸音部材とカバー部材との間に隙間を設けることにより、吸音部材に吸収される音の総量を増加させ、吸音部材による吸音効果を高めることができる。また、隙間が狭いほど音の反射回数が増加するので、隙間を狭く設定することにより、吸音効果をより高めることができる。本発明のパワーユニットカバーによれば、凸部の高さを変更することにより、隙間の高さが調節される。このため、例えばカバー部材の金型における凸部に対応する溝深さを変更することにより、容易に凸部の高さを変更し、隙間を調節できる。よって、容易に隙間の高さを所望の高さに設定し、遮音性を向上できる。
したがって、厚みを抑制しつつ、遮音性を向上したパワーユニットカバーを提供できる。 According to the power unit cover according to claim 1 of the present invention, the sound absorbing member has a concave portion, and the convex portion of the cover member is arranged in the concave portion of the sound absorbing member. As a result, since the sound absorbing member is inserted and arranged between the adjacent convex portions, the thickness of the entire power unit cover can be suppressed while increasing the thickness of the sound absorbing member.
Since the height dimension of the convex portion is formed larger than the depth dimension of the concave portion, a gap can be provided between the sound absorbing member and the cover member between the convex portions. Here, the noise generated from the power unit of the engine or the like is first absorbed by the sound absorbing member, and then the sound passing through the sound absorbing member is repeatedly reflected between the sound absorbing member and the cover member in the gap and absorbed by the sound absorbing member. .. Therefore, by providing a gap between the sound absorbing member and the cover member, the total amount of sound absorbed by the sound absorbing member can be increased, and the sound absorbing effect of the sound absorbing member can be enhanced. Further, since the number of times the sound is reflected increases as the gap is narrower, the sound absorption effect can be further enhanced by setting the gap narrower. According to the power unit cover of the present invention, the height of the gap is adjusted by changing the height of the convex portion. Therefore, for example, the height of the convex portion can be easily changed and the gap can be adjusted by changing the groove depth corresponding to the convex portion in the mold of the cover member. Therefore, the height of the gap can be easily set to a desired height, and the sound insulation can be improved.
Therefore, it is possible to provide a power unit cover having improved sound insulation while suppressing the thickness.

本発明の請求項２に記載のパワーユニットカバーによれば、凸部はリブであるので、凸部を容易に形成することができる。また、カバー本体にリブを設けることにより、カバー部材の剛性を高めることができる。 According to the power unit cover according to claim 2 of the present invention, since the convex portion is a rib, the convex portion can be easily formed. Further, by providing the rib on the cover body, the rigidity of the cover member can be increased.

本発明の請求項３に記載のパワーユニットカバーによれば、リブは、一対の縦リブと、一対の横リブと、を有し、吸音部材は、一対の縦リブ及び一対の横リブにより囲まれた枠部に配置される膨出部を有する。このように、リブを格子状に形成することで、吸音部材の凹部によって形成される膨出部を枠部に配置することができる。これにより、吸音部材をカバー部材に取り付ける際に、カバー部材に対する吸音部材の位置決めを容易に行うことができる。よって、製造時の組立て性を向上できる。 According to the power unit cover according to claim 3 of the present invention, the rib has a pair of vertical ribs and a pair of horizontal ribs, and the sound absorbing member is surrounded by a pair of vertical ribs and a pair of horizontal ribs. It has a bulge that is placed on the frame. By forming the ribs in a grid pattern in this way, the bulging portion formed by the concave portion of the sound absorbing member can be arranged in the frame portion. Thereby, when the sound absorbing member is attached to the cover member, the sound absorbing member can be easily positioned with respect to the cover member. Therefore, the assembleability at the time of manufacturing can be improved.

本発明の請求項４に記載のパワーユニットカバーによれば、吸音部材の溶着部をカバー部材の突出部に溶着することにより、吸音部材とカバー部材とを固定できる。これにより、カバー部材に対する吸音部材の浮き上がりやずれ等を抑制し、カバー部材と吸音部材との間に所望の高さの隙間を設けることができる。また、カバー部材と吸音部材との位置決め精度を向上できるので、隙間を狭く設定することができる。これにより、吸音効果をより高めることができる。
突出部及び溶着部は吸音部材の周縁部に設けられるので、カバー部材と吸音部材との間に設けられる隙間の領域を広く確保することができる。また、周縁部全体が溶着される場合と比較して、カバー部材と吸音部材との隙間の領域を広く確保することができる。これにより、隙間による吸音効果を一層高めることができる。 According to the power unit cover according to claim 4 of the present invention, the sound absorbing member and the cover member can be fixed by welding the welded portion of the sound absorbing member to the protruding portion of the cover member. As a result, it is possible to suppress the floating or shifting of the sound absorbing member with respect to the cover member, and to provide a gap of a desired height between the cover member and the sound absorbing member. Further, since the positioning accuracy between the cover member and the sound absorbing member can be improved, the gap can be set narrow. Thereby, the sound absorption effect can be further enhanced.
Since the projecting portion and the welding portion are provided on the peripheral edge of the sound absorbing member, it is possible to secure a wide area of the gap provided between the cover member and the sound absorbing member. Further, as compared with the case where the entire peripheral edge portion is welded, a wider area of the gap between the cover member and the sound absorbing member can be secured. As a result, the sound absorption effect due to the gap can be further enhanced.

本発明の請求項５に記載のパワーユニットカバーによれば、カバー本体は第一貫通孔を有し、吸音部材は第二貫通孔を有するので、吸音部材とパワーユニットとの間や、吸音部材とカバー部材との間等に浸入した水などの異物は、第一貫通孔及び第二貫通孔を通じて排出される。これにより、吸音部材が長時間水などの異物に接触するのを抑制し、吸音部材の経年劣化を抑制できる。また、第一貫通孔と第二貫通孔とは重なるように配置されるので、カバー部材側からパワーユニット側を覗いた際に、パワーユニットカバー内の視認できる領域を拡大できる。これにより、メンテナンス時の作業性を向上できる。 According to the power unit cover according to claim 5 of the present invention, since the cover main body has the first through hole and the sound absorbing member has the second through hole, the space between the sound absorbing member and the power unit and the sound absorbing member and the cover Foreign matter such as water that has entered between the members is discharged through the first through hole and the second through hole. As a result, it is possible to suppress the sound absorbing member from coming into contact with foreign matter such as water for a long time, and to suppress the aged deterioration of the sound absorbing member. Further, since the first through hole and the second through hole are arranged so as to overlap each other, the visible area in the power unit cover can be expanded when the power unit side is viewed from the cover member side. As a result, workability during maintenance can be improved.

本発明の請求項６に記載のパワーユニットカバーによれば、開口周辺部の上面は、第二貫通孔から外周部へ向かうにつれて第二貫通孔の内形が拡大するように傾斜しているので、吸音部材とパワーユニットとの間や、吸音部材とカバー部材との間等に浸入した水などの異物を傾斜に沿って第二貫通孔に誘導し、カバー部材の外に容易に排出することができる。また、カバー部材側からパワーユニット側を覗いた際に、視認できる領域をより拡大できる。よって、吸音部材の経年劣化を抑制し、メンテナンス時の作業性をより向上したパワーユニットカバーとすることができる。 According to the power unit cover according to claim 6 of the present invention, the upper surface of the opening peripheral portion is inclined so that the inner shape of the second through hole expands from the second through hole toward the outer peripheral portion. Foreign matter such as water that has entered between the sound absorbing member and the power unit, between the sound absorbing member and the cover member, etc. can be guided to the second through hole along the inclination and easily discharged to the outside of the cover member. .. Further, when the power unit side is viewed from the cover member side, the visible area can be further expanded. Therefore, it is possible to obtain a power unit cover that suppresses aged deterioration of the sound absorbing member and further improves workability during maintenance.

本発明の請求項７に記載のパワーユニットカバーによれば、水平部に配置される凸部により、カバー部材に対する吸音部材の位置決めを容易に行うことができる。また、傾斜部によりエンジン等のパワーユニットの前方が覆われるので、パワーユニットからの音や振動等がカバー部材の外部に伝わるのを抑制できる。傾斜部は水平部よりも前方に設けられ、傾斜部に設けられる凸部の間隔は、水平部に設けられる凸部の間隔よりも狭いので、前方からの走行風に対して傾斜部の強度を確保することができる。 According to the power unit cover according to claim 7 of the present invention, the sound absorbing member can be easily positioned with respect to the cover member by the convex portion arranged in the horizontal portion. Further, since the front surface of the power unit such as the engine is covered by the inclined portion, it is possible to suppress the sound and vibration from the power unit from being transmitted to the outside of the cover member. Since the inclined portion is provided in front of the horizontal portion and the distance between the convex portions provided on the inclined portion is narrower than the distance between the convex portions provided on the horizontal portion, the strength of the inclined portion is increased against the running wind from the front. Can be secured.

本発明の請求項８に記載のパワーユニットカバーによれば、側壁部を介してカバー部材がサイドメンバに連結されるので、カバー部材を強固に支持できる。フランジ部は、側壁部の前方に設けられているので、前方からの走行風の影響を受けやすいカバー部材の前方部分の面積を小さくすることができる。これにより、カバー部材の前方の強度を高め、走行風によるカバー部材の剥離や破断を防止できる。さらに、側壁部はサイドカバーに連結されるので、走行風に対して十分な支持強度を備えることができる。 According to the power unit cover according to claim 8 of the present invention, since the cover member is connected to the side member via the side wall portion, the cover member can be firmly supported. Since the flange portion is provided in front of the side wall portion, the area of the front portion of the cover member that is easily affected by the traveling wind from the front can be reduced. As a result, the strength in front of the cover member can be increased, and peeling or breakage of the cover member due to running wind can be prevented. Further, since the side wall portion is connected to the side cover, it is possible to provide sufficient supporting strength against the running wind.

本発明の請求項９に記載のパワーユニットカバーによれば、吸音部材は、車幅方向から見て、サイドメンバと重なるように配置されるので、吸音部材を車体の比較的高い位置に配置することができる。これにより、吸音部材がサイドメンバよりも低い位置に配置される場合と比較して、吸音部材が車体の下方へ突出するのを抑制し、パワーユニットカバーの下部と地面との間の空間を広く確保できる。よって、パワーユニットカバーの下部と地面との空間を確保するために車高が増加するのを抑制できる。 According to the power unit cover according to claim 9 of the present invention, the sound absorbing member is arranged so as to overlap the side member when viewed from the vehicle width direction, so that the sound absorbing member is arranged at a relatively high position of the vehicle body. Can be done. As a result, compared to the case where the sound absorbing member is arranged at a position lower than the side member, the sound absorbing member is suppressed from protruding downward from the vehicle body, and a wider space is secured between the lower part of the power unit cover and the ground. it can. Therefore, it is possible to suppress an increase in vehicle height in order to secure a space between the lower part of the power unit cover and the ground.

実施形態に係るパワーユニットカバーを備える車体を下方から見た斜視図。A perspective view of a vehicle body including the power unit cover according to the embodiment as viewed from below. 実施形態に係るパワーユニットカバーの下面図。Bottom view of the power unit cover according to the embodiment. 実施形態に係るパワーユニットカバーの上面図。Top view of the power unit cover according to the embodiment. 図３のＩＶ−ＩＶ線に沿う断面図。FIG. 3 is a cross-sectional view taken along the line IV-IV of FIG. 図３のＶ−Ｖ線に沿う断面図。FIG. 3 is a cross-sectional view taken along the line VV of FIG. 図５のＶＩ部拡大図。The enlarged view of the VI part of FIG. 図４のＶＩＩ部拡大図。VII part enlarged view of FIG. 図３のＶＩＩＩ−ＶＩＩＩ線に沿う断面図。FIG. 3 is a cross-sectional view taken along the line VIII-VIII of FIG.

以下、本発明の実施形態について図面を参照して説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施形態）
（パワーユニットカバー）
図１は、実施形態に係るパワーユニットカバー１を備える車体１０を下方から見た斜視図である。
パワーユニットカバー１は、車体１０に搭載された内燃機関であるエンジン１１（請求項のパワーユニット）の下方を覆うように組付けられている。本実施形態において、パワーユニットカバー１は、車体１０の前方に設けられている。パワーユニットカバー１は、エンジン１１ルーム内で生じる騒音を吸収するとともに、騒音が車外及び車内に洩れるのを低減するための遮音機能を果たしている。
以下の説明において、図中のＵＰの記号は、車体１０の上方と一致している。図中のＦＲの記号は、車体１０の前方と一致している。 (Embodiment)
(Power unit cover)
FIG. 1 is a perspective view of the vehicle body 10 including the power unit cover 1 according to the embodiment as viewed from below.
The power unit cover 1 is assembled so as to cover the lower part of the engine 11 (power unit according to the claim) which is an internal combustion engine mounted on the vehicle body 10. In the present embodiment, the power unit cover 1 is provided in front of the vehicle body 10. The power unit cover 1 absorbs the noise generated in the engine 11 room and also has a sound insulation function for reducing the noise from leaking to the outside and the inside of the vehicle.
In the following description, the UP symbol in the figure coincides with the upper part of the vehicle body 10. The FR symbol in the figure coincides with the front of the vehicle body 10.

図２は、実施形態に係るパワーユニットカバー１の下面図である。図３は、実施形態に係るパワーユニットカバー１の上面図である。
パワーユニットカバー１は、カバー部材２と、吸音部材３と、を備える。 FIG. 2 is a bottom view of the power unit cover 1 according to the embodiment. FIG. 3 is a top view of the power unit cover 1 according to the embodiment.
The power unit cover 1 includes a cover member 2 and a sound absorbing member 3.

（カバー部材）
図４は、図３のＩＶ−ＩＶ線に沿う断面図である。
カバー部材２は、エンジン１１の下方及び左右の側面を覆っている。カバー部材２は、例えば樹脂材料により形成されている。カバー部材２は、例えば図示しないクリップ等を用いて車体１０に固定されている。カバー部材２は、カバー本体４と、複数の凸部５と、を有する。
カバー本体４は、前後方向から見て、左右方向に沿う断面形状がＵ字状となるように形成されている。カバー本体４は、複数の板部材を組み合わせて形成されている。具体的に、カバー本体４は、第一部材６と、一対の第二部材７と、を有する。 (Cover member)
FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG.
The cover member 2 covers the lower side and the left and right side surfaces of the engine 11. The cover member 2 is made of, for example, a resin material. The cover member 2 is fixed to the vehicle body 10 by using, for example, a clip (not shown). The cover member 2 has a cover main body 4 and a plurality of convex portions 5.
The cover body 4 is formed so that the cross-sectional shape along the left-right direction is U-shaped when viewed from the front-rear direction. The cover body 4 is formed by combining a plurality of plate members. Specifically, the cover main body 4 has a first member 6 and a pair of second members 7.

第一部材６は、エンジン１１の下方に配置されている。第一部材６は、上下方向に面する板状に形成されている。第一部材６は、水平部８と、傾斜部９と、を有する。
図２に示すように、水平部８は、前後方向及び左右方向（請求項の車幅方向）に延びる、ほぼ水平な矩形板状に形成されている。水平部８は、エンジン１１の下面１１ａ（図４参照）と対応する位置に配置されている。水平部８の前部には、前方へ向かうにつれて幅が縮小された幅狭部１５が一体に形成されている。水平部８は、第一貫通孔１６と、突出部１７（図３参照）と、を有する。 The first member 6 is arranged below the engine 11. The first member 6 is formed in a plate shape facing in the vertical direction. The first member 6 has a horizontal portion 8 and an inclined portion 9.
As shown in FIG. 2, the horizontal portion 8 is formed in a substantially horizontal rectangular plate shape extending in the front-rear direction and the left-right direction (claimed vehicle width direction). The horizontal portion 8 is arranged at a position corresponding to the lower surface 11a (see FIG. 4) of the engine 11. A narrow portion 15 whose width is reduced toward the front is integrally formed in the front portion of the horizontal portion 8. The horizontal portion 8 has a first through hole 16 and a protruding portion 17 (see FIG. 3).

図５は、図３のＶ−Ｖ線に沿う断面図である。図６は、図５のＶＩ部拡大図である。
図３及び図５に示すように、第一貫通孔１６は、水平部８を上下方向に貫通している。第一貫通孔１６は、複数設けられている。第一貫通孔１６は、上下方向から見て、円形状又は長円形状に形成されている。
図６に示すように、突出部１７は、水平部８からエンジン１１側（上方）へ向かって突出している。より具体的に、突出部１７は、詳しくは後述する吸音部材３の周縁部３６に対向する位置において、吸音部材３側に突出するとともに吸音部材３に接触している。突出部１７は、複数（本実施形態では６個）設けられている（図３も参照）。 FIG. 5 is a cross-sectional view taken along the line VV of FIG. FIG. 6 is an enlarged view of the VI portion of FIG.
As shown in FIGS. 3 and 5, the first through hole 16 penetrates the horizontal portion 8 in the vertical direction. A plurality of first through holes 16 are provided. The first through hole 16 is formed in a circular shape or an oval shape when viewed from the vertical direction.
As shown in FIG. 6, the projecting portion 17 projects from the horizontal portion 8 toward the engine 11 side (upward). More specifically, the protruding portion 17 projects toward the sound absorbing member 3 and is in contact with the sound absorbing member 3 at a position facing the peripheral edge portion 36 of the sound absorbing member 3, which will be described in detail later. A plurality of protrusions 17 (six in this embodiment) are provided (see also FIG. 3).

図５に示すように、傾斜部９は、水平部８における幅狭部１５の前端に接続されている。傾斜部９は、幅狭部１５の前端から上方に向かって湾曲状に傾斜している。傾斜部９は、エンジン１１の下面１１ａと前面１１ｂとの間の角部に対応する位置に配置されている。傾斜部９は、水平部８と一体に形成されている。 As shown in FIG. 5, the inclined portion 9 is connected to the front end of the narrow portion 15 in the horizontal portion 8. The inclined portion 9 is inclined upward from the front end of the narrow portion 15. The inclined portion 9 is arranged at a position corresponding to a corner portion between the lower surface 11a and the front surface 11b of the engine 11. The inclined portion 9 is formed integrally with the horizontal portion 8.

図４に示すように、第二部材７は、第一部材６に対して左右方向の両側に一対配置されている。第二部材７は、左右方向に面する板状に形成されている。なお、一対の第二部材７はほぼ対称な形状に形成されているので、以下の説明においては右方の第二部材７について詳しく説明し、左方の第二部材７の説明を省略する。第二部材７は、側壁部１８と、フランジ部１９（図１参照）と、を有する。 As shown in FIG. 4, a pair of second members 7 are arranged on both sides in the left-right direction with respect to the first member 6. The second member 7 is formed in a plate shape facing the left-right direction. Since the pair of second members 7 are formed in a substantially symmetrical shape, the second member 7 on the right side will be described in detail in the following description, and the description of the second member 7 on the left side will be omitted. The second member 7 has a side wall portion 18 and a flange portion 19 (see FIG. 1).

図１及び図４に示すように、側壁部１８は、上下方向及び前後方向に延びる板状に形成されている。側壁部１８の下端部１８ａは、左右方向の内側に向かって屈曲され、屈曲された下端部１８ａと水平部８とが図示しない締結部材により締結固定されている。図３に示すように、側壁部１８のうち屈曲されて水平となった下端部１８ａは、車体１０の前後方向に延びるサイドメンバ１２に連結されている。これにより、カバー本体４は、側壁部１８を介して車体１０のサイドメンバ１２に固定されている。
図１及び図２に示すように、フランジ部１９は、側壁部１８の前方に設けられている。フランジ部１９は、側壁部１８と一体に形成されている。フランジ部１９は、側壁部１８の下端部１８ａから左右方向の内側に向かって延びている。フランジ部１９は、水平部８における幅狭部１５の左右方向の端部に接続されている。フランジ部１９は、図示しない締結部材により幅狭部１５に締結固定されている。 As shown in FIGS. 1 and 4, the side wall portion 18 is formed in a plate shape extending in the vertical direction and the front-rear direction. The lower end portion 18a of the side wall portion 18 is bent inward in the left-right direction, and the bent lower end portion 18a and the horizontal portion 8 are fastened and fixed by a fastening member (not shown). As shown in FIG. 3, the lower end portion 18a of the side wall portion 18 that is bent and horizontal is connected to the side member 12 extending in the front-rear direction of the vehicle body 10. As a result, the cover body 4 is fixed to the side member 12 of the vehicle body 10 via the side wall portion 18.
As shown in FIGS. 1 and 2, the flange portion 19 is provided in front of the side wall portion 18. The flange portion 19 is integrally formed with the side wall portion 18. The flange portion 19 extends inward in the left-right direction from the lower end portion 18a of the side wall portion 18. The flange portion 19 is connected to the left-right end portion of the narrow portion 15 in the horizontal portion 8. The flange portion 19 is fastened and fixed to the narrow portion 15 by a fastening member (not shown).

このように形成された第一部材６と一対の第二部材７とを連結することにより、カバー本体４が形成される。カバー本体４は、サイドメンバ１２や車体１０の左右方向の側面を形成する側方部材等（不図示）に取り付けられることにより、車体１０に固定されている。 The cover body 4 is formed by connecting the first member 6 and the pair of second members 7 formed in this way. The cover body 4 is fixed to the vehicle body 10 by being attached to a side member 12 or a side member (not shown) forming a side surface of the vehicle body 10 in the left-right direction.

図２に示すように、凸部５は、第一部材６と、第二部材７のうち屈曲されて左右方向に延びる下端部１８ａと、に設けられている。本実施形態において、凸部５は、カバー本体４からエンジン１１側へ向かって突出したリブ５である。リブ５は、前後方向に沿って延びる突条に形成された複数の縦リブ２１と、左右方向に沿って延びる突条に形成された複数の横リブ２２と、を有する。複数の縦リブ２１は、平行に形成されている。複数の横リブ２２は、平行に形成されている。リブ５は、隣り合う一対の縦リブ２１及び隣り合う一対の横リブ２２により囲まれた矩形状の第一枠部２３及び第二枠部２４を形成している。第一枠部２３は、水平部８に設けられている。第二枠部２４は、傾斜部９に設けられている。 As shown in FIG. 2, the convex portion 5 is provided on the first member 6 and the lower end portion 18a of the second member 7 which is bent and extends in the left-right direction. In the present embodiment, the convex portion 5 is a rib 5 protruding from the cover main body 4 toward the engine 11. The rib 5 has a plurality of vertical ribs 21 formed in ridges extending in the front-rear direction, and a plurality of lateral ribs 22 formed in ridges extending in the left-right direction. The plurality of vertical ribs 21 are formed in parallel. The plurality of lateral ribs 22 are formed in parallel. The ribs 5 form a rectangular first frame portion 23 and a second frame portion 24 surrounded by a pair of adjacent vertical ribs 21 and a pair of adjacent horizontal ribs 22. The first frame portion 23 is provided in the horizontal portion 8. The second frame portion 24 is provided on the inclined portion 9.

複数のリブ５のうち、第一部材６の水平部８及び第二部材７に設けられた縦リブ２１の間隔Ｌ１Ａ及び横リブ２２の間隔Ｌ１Ｂは、同一となるように形成されている。これにより、上下方向から見て、水平部８の縦リブ２１及び横リブ２２により囲まれた第一枠部２３の形状は、正方形状となっている。一方、第一部材６の傾斜部９に設けられた縦リブ２１の左右方向における間隔Ｌ２は、水平部８に設けられる縦リブ２１の左右方向における間隔Ｌ１Ａよりも狭い。具体的に、傾斜部９に設けられる隣り合う縦リブ２１の間隔Ｌ２は、水平部８に設けられる隣り合う縦リブ２１の間隔Ｌ１Ａの半分となっている。これにより、上下方向から見て、傾斜部９の縦リブ２１及び横リブ２２により囲まれた第二枠部２４の形状は、長方形状となっている。 Of the plurality of ribs 5, the intervals L1A of the vertical ribs 21 and the intervals L1B of the horizontal ribs 22 provided on the horizontal portion 8 and the second member 7 of the first member 6 are formed to be the same. As a result, when viewed from the vertical direction, the shape of the first frame portion 23 surrounded by the vertical ribs 21 and the horizontal ribs 22 of the horizontal portion 8 is square. On the other hand, the distance L2 in the left-right direction of the vertical ribs 21 provided on the inclined portion 9 of the first member 6 is narrower than the distance L1A in the left-right direction of the vertical ribs 21 provided on the horizontal portion 8. Specifically, the distance L2 between the adjacent vertical ribs 21 provided on the inclined portion 9 is half of the distance L1A between the adjacent vertical ribs 21 provided on the horizontal portion 8. As a result, when viewed from the vertical direction, the shape of the second frame portion 24 surrounded by the vertical ribs 21 and the horizontal ribs 22 of the inclined portion 9 is rectangular.

（吸音部材）
図３に示すように、吸音部材３は、カバー部材２とエンジン１１との間に配置されている。吸音部材３は、板状に形成されている。吸音部材３は、上下方向から見て、カバー本体４の第一部材６と対応する形状に形成されている。具体的に、吸音部材３は、水平部８に対応する矩形状の第一部分２５と、傾斜部９に対応する左右方向に長い長方形状の第二部分２６と、左右方向の右方において第一部分２５と第二部分２６とを接続する第三部分２７と、を有する。第一部分２５の後端には、前方へ向かって凹む空洞部２８が設けられている。
吸音部材３は、例えば多孔質な樹脂材料により形成されている。吸音部材３は、例えばエンジン１１等により発生した音を吸収する部材である。吸音部材３は、凹部３１と、溶着部３２と、第二貫通孔３３と、を有する。 (Sound absorbing member)
As shown in FIG. 3, the sound absorbing member 3 is arranged between the cover member 2 and the engine 11. The sound absorbing member 3 is formed in a plate shape. The sound absorbing member 3 is formed in a shape corresponding to the first member 6 of the cover main body 4 when viewed from the vertical direction. Specifically, the sound absorbing member 3 has a rectangular first portion 25 corresponding to the horizontal portion 8, a rectangular second portion 26 corresponding to the inclined portion 9 in the left-right direction, and a first portion on the right side in the left-right direction. It has a third portion 27, which connects the 25 and the second portion 26. At the rear end of the first portion 25, a cavity 28 that is recessed forward is provided.
The sound absorbing member 3 is formed of, for example, a porous resin material. The sound absorbing member 3 is a member that absorbs the sound generated by, for example, the engine 11. The sound absorbing member 3 has a recess 31, a welded portion 32, and a second through hole 33.

図７は、図４のＶＩＩ部拡大図である。
凹部３１は、吸音部材３の下面に設けられている。カバー部材２の上方に吸音部材３が配置された状態において、凹部３１は、カバー部材２の縦リブ２１及び横リブ２２と対応する位置に形成されている。隣り合う凹部３１同士の間は、膨出部３５とされている。膨出部３５は、上下方向から見て、矩形状に形成されている。膨出部３５は、カバー部材２のリブ５により形成された第一枠部２３及び第二枠部２４内に配置されている。ここで、凹部３１の深さ寸法Ｈ１は、リブ５の高さ寸法Ｈ２よりも小さい。凹部３１の底面３４には、リブ５が当接している。これにより、凹部３１を除く吸音部材３（すなわち、膨出部３５）と、カバー部材２の水平部８と、には隙間Ｓが設けられている。 FIG. 7 is an enlarged view of the VII portion of FIG.
The recess 31 is provided on the lower surface of the sound absorbing member 3. In a state where the sound absorbing member 3 is arranged above the cover member 2, the recess 31 is formed at a position corresponding to the vertical rib 21 and the horizontal rib 22 of the cover member 2. A bulging portion 35 is formed between the adjacent recesses 31. The bulging portion 35 is formed in a rectangular shape when viewed from the vertical direction. The bulging portion 35 is arranged in the first frame portion 23 and the second frame portion 24 formed by the rib 5 of the cover member 2. Here, the depth dimension H1 of the recess 31 is smaller than the height dimension H2 of the rib 5. The rib 5 is in contact with the bottom surface 34 of the recess 31. As a result, a gap S is provided between the sound absorbing member 3 (that is, the bulging portion 35) excluding the recess 31 and the horizontal portion 8 of the cover member 2.

図７に矢印Ｎで示すように、吸音部材３の上方に配置されたエンジン１１から発生した音の一部は、吸音部材３を通過する際に吸音部材３により吸収される。このとき吸収されずに吸音部材３を通過した音は、隙間Ｓ内に進入し、この隙間Ｓにおいてカバー部材２と吸音部材３との間で反射を繰り返しながら、吸音部材３により徐々に吸収される。 As shown by an arrow N in FIG. 7, a part of the sound generated from the engine 11 arranged above the sound absorbing member 3 is absorbed by the sound absorbing member 3 when passing through the sound absorbing member 3. At this time, the sound that has passed through the sound absorbing member 3 without being absorbed enters the gap S, and is gradually absorbed by the sound absorbing member 3 while repeating reflection between the cover member 2 and the sound absorbing member 3 in this gap S. To.

図３に戻って、溶着部３２は、吸音部材３の周縁部３６に設けられている。図６に示すように、溶着部３２は、カバー部材２の突出部１７に当接している。溶着部３２と突出部１７とは溶接されている。これにより、吸音部材３は、カバー部材２に固定されている。 Returning to FIG. 3, the welding portion 32 is provided on the peripheral edge portion 36 of the sound absorbing member 3. As shown in FIG. 6, the welded portion 32 is in contact with the protruding portion 17 of the cover member 2. The welded portion 32 and the protruding portion 17 are welded together. As a result, the sound absorbing member 3 is fixed to the cover member 2.

図８は、図３のＶＩＩＩ−ＶＩＩＩ線に沿う断面図である。
第二貫通孔３３は、吸音部材３を厚み方向に貫通している。上下方向から見て、第二貫通孔３３は、カバー部材２の第一貫通孔１６と重なるように配置されている（図３も参照）。吸音部材３における第二貫通孔３３の外周部には、開口周辺部３７が設けられている。開口周辺部３７の上面は、第二貫通孔３３から外周部へ向かうにつれて第二貫通孔３３の内形が拡大するように傾斜している。 FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG.
The second through hole 33 penetrates the sound absorbing member 3 in the thickness direction. When viewed from the vertical direction, the second through hole 33 is arranged so as to overlap the first through hole 16 of the cover member 2 (see also FIG. 3). An opening peripheral portion 37 is provided on the outer peripheral portion of the second through hole 33 in the sound absorbing member 3. The upper surface of the opening peripheral portion 37 is inclined so that the inner shape of the second through hole 33 expands from the second through hole 33 toward the outer peripheral portion.

このように形成された吸音部材３の上方には、吸音部材３と間隔をあけてエンジン１１が配置されている。カバー部材２及び吸音部材３が車体１０に取り付けられた状態において、吸音部材３は、左右方向から見て、サイドメンバ１２と重なるように配置されている。 Above the sound absorbing member 3 formed in this way, the engine 11 is arranged at intervals from the sound absorbing member 3. In a state where the cover member 2 and the sound absorbing member 3 are attached to the vehicle body 10, the sound absorbing member 3 is arranged so as to overlap the side member 12 when viewed from the left and right directions.

（作用、効果）
次に、パワーユニットカバー１の作用、効果について説明する。
本実施形態のパワーユニットカバー１によれば、吸音部材３は凹部３１を有し、吸音部材３の凹部３１にはカバー部材２の凸部５（リブ５）が配置される。これにより、隣り合うリブ５同士の間に吸音部材３が入り込んで配置されるので、吸音部材３の厚みを増加させつつパワーユニットカバー１全体の厚みを抑えることができる。
リブ５の高さ寸法Ｈ２は、凹部３１の深さ寸法Ｈ１よりも大きく形成されるので、リブ５同士の間において、吸音部材３とカバー部材２との間に隙間Ｓを設けることができる。ここで、エンジン１１等のパワーユニットから発生した騒音は、先ず吸音部材３に吸収され、さらに吸音部材３を通り抜けた音が隙間Ｓ内において吸音部材３とカバー部材２との間で繰り返し反射しながら吸音部材３に吸収される。よって、吸音部材３とカバー部材２との間に隙間Ｓを設けることにより、吸音部材３に吸収される音の総量を増加させ、吸音部材３による吸音効果を高めることができる。また、隙間Ｓが狭いほど音の反射回数が増加するので、隙間Ｓを狭く設定することにより、吸音効果をより高めることができる。本発明のパワーユニットカバー１によれば、凸部５の高さを変更することにより、隙間Ｓの高さが調節される。このため、例えばカバー部材２の金型におけるリブ５に対応する溝深さを変更することにより、容易にリブ５の高さを変更し、隙間Ｓを調節できる。よって、容易に隙間Ｓの高さを所望の高さに設定し、遮音性を向上できる。
したがって、厚みを抑制しつつ、遮音性を向上したパワーユニットカバー１を提供できる。 (Action, effect)
Next, the operation and effect of the power unit cover 1 will be described.
According to the power unit cover 1 of the present embodiment, the sound absorbing member 3 has a concave portion 31, and the convex portion 5 (rib 5) of the cover member 2 is arranged in the concave portion 31 of the sound absorbing member 3. As a result, since the sound absorbing member 3 is arranged so as to be inserted between the adjacent ribs 5, the thickness of the entire power unit cover 1 can be suppressed while increasing the thickness of the sound absorbing member 3.
Since the height dimension H2 of the rib 5 is formed larger than the depth dimension H1 of the recess 31, a gap S can be provided between the ribs 5 and the sound absorbing member 3 and the cover member 2. Here, the noise generated from the power unit such as the engine 11 is first absorbed by the sound absorbing member 3, and the sound passing through the sound absorbing member 3 is repeatedly reflected between the sound absorbing member 3 and the cover member 2 in the gap S. It is absorbed by the sound absorbing member 3. Therefore, by providing the gap S between the sound absorbing member 3 and the cover member 2, the total amount of sound absorbed by the sound absorbing member 3 can be increased, and the sound absorbing effect of the sound absorbing member 3 can be enhanced. Further, since the number of times the sound is reflected increases as the gap S becomes narrower, the sound absorption effect can be further enhanced by setting the gap S narrower. According to the power unit cover 1 of the present invention, the height of the gap S is adjusted by changing the height of the convex portion 5. Therefore, for example, the height of the rib 5 can be easily changed and the gap S can be adjusted by changing the groove depth corresponding to the rib 5 in the mold of the cover member 2. Therefore, the height of the gap S can be easily set to a desired height, and the sound insulation can be improved.
Therefore, it is possible to provide the power unit cover 1 having improved sound insulation while suppressing the thickness.

本実施形態において、凸部５はリブ５であるので、凸部５を容易に形成することができる。また、カバー本体４にリブ５を設けることにより、カバー部材２の剛性を高めることができる。 In the present embodiment, since the convex portion 5 is a rib 5, the convex portion 5 can be easily formed. Further, by providing the rib 5 on the cover main body 4, the rigidity of the cover member 2 can be increased.

リブ５は、一対の縦リブ２１と、一対の横リブ２２と、を有し、吸音部材３は、一対の縦リブ２１及び一対の横リブ２２により囲まれた第一枠部２３及び第二枠部２４に配置される膨出部３５を有する。このように、リブ５を格子状に形成することで、吸音部材３の凹部３１によって形成される矩形状の膨出部３５を第一枠部２３及び第二枠部２４に配置することができる。これにより、吸音部材３をカバー部材２に取り付ける際に、カバー部材２に対する吸音部材３の位置決めを容易に行うことができる。よって、製造時の組立て性を向上できる。 The rib 5 has a pair of vertical ribs 21 and a pair of horizontal ribs 22, and the sound absorbing member 3 has a first frame portion 23 and a second frame portion 23 surrounded by a pair of vertical ribs 21 and a pair of horizontal ribs 22. It has a bulging portion 35 arranged on the frame portion 24. By forming the ribs 5 in a grid pattern in this way, the rectangular bulging portion 35 formed by the recesses 31 of the sound absorbing member 3 can be arranged in the first frame portion 23 and the second frame portion 24. .. As a result, when the sound absorbing member 3 is attached to the cover member 2, the sound absorbing member 3 can be easily positioned with respect to the cover member 2. Therefore, the assembleability at the time of manufacturing can be improved.

吸音部材３の溶着部３２をカバー部材２の突出部１７に溶着することにより、吸音部材３とカバー部材２とを固定できる。これにより、カバー部材２に対する吸音部材３の浮き上がりやずれ等を抑制し、カバー部材２と吸音部材３との間に所望の高さの隙間Ｓを設けることができる。また、カバー部材２と吸音部材３との位置決め精度を向上できるので、隙間Ｓを狭く設定することができる。これにより、吸音効果をより高めることができる。
突出部１７及び溶着部３２は吸音部材３の周縁部３６に設けられるので、カバー部材２と吸音部材３との間に設けられる隙間Ｓの領域を広く確保することができる。また、周縁部３６全体が溶着される場合と比較して、カバー部材２と吸音部材３との隙間Ｓの領域を広く確保することができる。これにより、隙間Ｓで音を反射させる回数を増加させ、吸音効果を一層高めることができる。 The sound absorbing member 3 and the cover member 2 can be fixed by welding the welded portion 32 of the sound absorbing member 3 to the protruding portion 17 of the cover member 2. As a result, it is possible to suppress the floating or shifting of the sound absorbing member 3 with respect to the cover member 2, and to provide a gap S having a desired height between the cover member 2 and the sound absorbing member 3. Further, since the positioning accuracy between the cover member 2 and the sound absorbing member 3 can be improved, the gap S can be set narrow. Thereby, the sound absorption effect can be further enhanced.
Since the projecting portion 17 and the welding portion 32 are provided on the peripheral edge portion 36 of the sound absorbing member 3, a wide area of the gap S provided between the cover member 2 and the sound absorbing member 3 can be secured. Further, as compared with the case where the entire peripheral edge portion 36 is welded, it is possible to secure a wider region of the gap S between the cover member 2 and the sound absorbing member 3. As a result, the number of times the sound is reflected by the gap S can be increased, and the sound absorption effect can be further enhanced.

カバー本体４は第一貫通孔１６を有し、吸音部材３は第二貫通孔３３を有するので、吸音部材３とエンジン１１（パワーユニット）との間や、吸音部材３とカバー部材２との間等に浸入した水などの異物は、第一貫通孔１６及び第二貫通孔３３を通じて排出される。これにより、吸音部材３が長時間水などの異物に接触するのを抑制し、吸音部材３の経年劣化を抑制できる。また、第一貫通孔１６と第二貫通孔３３とは重なるように配置されるので、カバー部材２側からパワーユニット側を覗いた際に、パワーユニットカバー１内の視認できる領域を拡大できる。これにより、メンテナンス時の作業性を向上できる。 Since the cover body 4 has the first through hole 16 and the sound absorbing member 3 has the second through hole 33, between the sound absorbing member 3 and the engine 11 (power unit) or between the sound absorbing member 3 and the cover member 2. Foreign matter such as water that has entered the or the like is discharged through the first through hole 16 and the second through hole 33. As a result, it is possible to suppress the sound absorbing member 3 from coming into contact with foreign matter such as water for a long time, and to suppress the aged deterioration of the sound absorbing member 3. Further, since the first through hole 16 and the second through hole 33 are arranged so as to overlap each other, the visible area in the power unit cover 1 can be expanded when the power unit side is viewed from the cover member 2 side. As a result, workability during maintenance can be improved.

開口周辺部３７の上面は、第二貫通孔３３から外周部へ向かうにつれて第二貫通孔３３の内形が拡大するように傾斜しているので、吸音部材３とパワーユニットとの間や、吸音部材３とカバー部材２との間等に浸入した水などの異物を第二貫通孔３３に誘導し、カバー部材２の外に容易に排出することができる。また、カバー部材２側からパワーユニット側を覗いた際に、視認できる領域をより拡大できる。よって、吸音部材３の経年劣化を抑制し、メンテナンス時の作業性をより向上したパワーユニットカバー１とすることができる。 Since the upper surface of the opening peripheral portion 37 is inclined so that the inner shape of the second through hole 33 expands from the second through hole 33 toward the outer peripheral portion, the space between the sound absorbing member 3 and the power unit and the sound absorbing member Foreign matter such as water that has entered between the cover member 2 and the cover member 2 can be guided to the second through hole 33 and easily discharged to the outside of the cover member 2. Further, when the power unit side is viewed from the cover member 2 side, the visible area can be further expanded. Therefore, it is possible to obtain the power unit cover 1 in which the aged deterioration of the sound absorbing member 3 is suppressed and the workability at the time of maintenance is further improved.

水平部８に配置されるリブ５により、カバー部材２に対する吸音部材３の位置決めを容易に行うことができる。また、傾斜部９によりエンジン１１の前方が覆われるので、エンジン１１からの音や振動等がカバー部材２の外部に伝わるのを抑制できる。傾斜部９は水平部８よりも前方に設けられ、傾斜部９に設けられるリブ５の間隔Ｌ２は、水平部８に設けられるリブ５の間隔Ｌ１Ａよりも狭いので、前方からの走行風に対して傾斜部９の強度を確保することができる。 The rib 5 arranged on the horizontal portion 8 makes it possible to easily position the sound absorbing member 3 with respect to the cover member 2. Further, since the front surface of the engine 11 is covered by the inclined portion 9, it is possible to suppress the sound and vibration from the engine 11 from being transmitted to the outside of the cover member 2. The inclined portion 9 is provided in front of the horizontal portion 8, and the distance L2 between the ribs 5 provided in the inclined portion 9 is narrower than the distance L1A between the ribs 5 provided in the horizontal portion 8. Therefore, the strength of the inclined portion 9 can be ensured.

側壁部１８を介してカバー部材２がサイドメンバ１２に連結されるので、カバー部材２を強固に支持できる。フランジ部１９は、側壁部１８の前方に設けられているので、前方からの走行風の影響を受けやすいカバー部材２の前方部分の面積を小さくすることができる。これにより、カバー部材２の前方の強度を高め、走行風によるカバー部材２の剥離や破断を防止できる。さらに、側壁部１８はサイドカバーに連結されるので、走行風に対して十分な支持強度を備えることができる。 Since the cover member 2 is connected to the side member 12 via the side wall portion 18, the cover member 2 can be firmly supported. Since the flange portion 19 is provided in front of the side wall portion 18, the area of the front portion of the cover member 2 that is easily affected by the traveling wind from the front can be reduced. As a result, the strength in front of the cover member 2 can be increased, and peeling or breakage of the cover member 2 due to running wind can be prevented. Further, since the side wall portion 18 is connected to the side cover, it is possible to provide sufficient supporting strength against the running wind.

吸音部材３は、車幅方向から見て、サイドメンバ１２と重なるように配置されるので、吸音部材３を車体１０の比較的高い位置に配置することができる。これにより、吸音部材３がサイドメンバ１２よりも低い位置に配置される場合と比較して、吸音部材３が車体１０の下方へ突出するのを抑制し、パワーユニットカバー１の下部と地面との間の空間を広く確保できる。よって、パワーユニットカバー１の下部と地面との空間を確保するために車高が増加するのを抑制できる。 Since the sound absorbing member 3 is arranged so as to overlap the side member 12 when viewed from the vehicle width direction, the sound absorbing member 3 can be arranged at a relatively high position of the vehicle body 10. As a result, as compared with the case where the sound absorbing member 3 is arranged at a position lower than the side member 12, the sound absorbing member 3 is suppressed from protruding downward from the vehicle body 10, and the space between the lower portion of the power unit cover 1 and the ground is suppressed. A wide space can be secured. Therefore, it is possible to suppress an increase in vehicle height in order to secure a space between the lower portion of the power unit cover 1 and the ground.

なお、本発明の技術範囲は上述した実施形態に限定されるものではなく、本発明の趣旨を逸脱しない範囲において種々の変更を加えることが可能である。
例えば、上述した実施形態では、カバー部材２がサイドメンバ１２に取り付けられる構成について説明したが、これに限らない。例えば、カバー部材２は、車体１０のフロアやクロスメンバ等、サイドメンバ１２以外の部品に取り付けられてもよい。 The technical scope of the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention.
For example, in the above-described embodiment, the configuration in which the cover member 2 is attached to the side member 12 has been described, but the present invention is not limited to this. For example, the cover member 2 may be attached to a part other than the side member 12, such as the floor of the vehicle body 10 or the cross member.

凸部５の形状は上述した実施形態に限定されない。すなわち、カバー部材２は、例えば角柱状等、突条のリブ５とは異なる形状の凸部５を有していてもよい。
第一貫通孔１６及び第二貫通孔３３の個数及び形状は、上述した実施形態に限定されない。 The shape of the convex portion 5 is not limited to the above-described embodiment. That is, the cover member 2 may have a convex portion 5 having a shape different from that of the rib 5 of the ridge, such as a prismatic shape.
The number and shape of the first through hole 16 and the second through hole 33 are not limited to the above-described embodiment.

上述した実施形態では、カバー部材２に対して単一の吸音部材３を配置したが、吸音部材３は複数設けられてもよい。すなわち、複数の分割された吸音部材３を並べて配置することにより、水平部８を覆う構成としてもよい。 In the above-described embodiment, a single sound absorbing member 3 is arranged with respect to the cover member 2, but a plurality of sound absorbing members 3 may be provided. That is, the horizontal portion 8 may be covered by arranging the plurality of divided sound absorbing members 3 side by side.

水平部８の後端に傾斜部９が設けられてもよい。
カバー部材２と吸音部材３との固定は、例えばボルト締結やカシメ等、溶着以外の方法で固定されてもよい。 An inclined portion 9 may be provided at the rear end of the horizontal portion 8.
The cover member 2 and the sound absorbing member 3 may be fixed by a method other than welding, such as bolt fastening or caulking.

エンジン１１及びパワーユニットカバー１は、車体１０の後方に設けられていてもよい。パワーユニットカバー１は、モータ等、エンジン１１以外のパワーユニットを覆っていてもよい。パワーユニットカバー１は、エンジン１１等のパワーユニットを上方から覆っていてもよい。 The engine 11 and the power unit cover 1 may be provided behind the vehicle body 10. The power unit cover 1 may cover a power unit other than the engine 11 such as a motor. The power unit cover 1 may cover a power unit such as an engine 11 from above.

その他、本発明の趣旨を逸脱しない範囲で、上述した実施形態における構成要素を周知の構成要素に置き換えることは適宜可能であり、また、上述した実施形態及び変形例を適宜組み合わせてもよい。 In addition, it is possible to replace the constituent elements in the above-described embodiments with well-known components as appropriate without departing from the spirit of the present invention, and the above-described embodiments and modifications may be appropriately combined.

１ パワーユニットカバー
２ カバー部材
３ 吸音部材
４ カバー本体
５ リブ（凸部）
８ 水平部
９ 傾斜部
１１ エンジン（パワーユニット）
１２ サイドメンバ
１６ 第一貫通孔
１７ 突出部
１８ 側壁部
１８ａ 下端部
１９ フランジ部
２１ 縦リブ
２２ 横リブ
２３ 第一枠部（枠部）
２４ 第二枠部（枠部）
３１ 凹部
３２ 溶着部
３３ 第二貫通孔
３４ 底面
３５ 膨出部
３６ 周縁部
３７ 開口周辺部
Ｈ１ 凸部の高さ寸法
Ｈ２ 凹部の深さ寸法
Ｌ１Ａ 水平部におけるリブの間隔
Ｌ２ 傾斜部におけるリブの間隔
Ｓ 隙間 1 Power unit cover 2 Cover member 3 Sound absorbing member 4 Cover body 5 Ribs (convex part)
8 Horizontal part 9 Inclined part 11 Engine (power unit)
12 Side member 16 First through hole 17 Protruding part 18 Side wall part 18a Lower end part 19 Flange part 21 Vertical rib 22 Horizontal rib 23 First frame part (frame part)
24 Second frame (frame)
31 Recessed portion 32 Welded portion 33 Second through hole 34 Bottom surface 35 Protruded portion 36 Peripheral portion 37 Opening peripheral portion H1 Convex height dimension H2 Recessed depth dimension L1A Rib spacing in horizontal section L2 Rib spacing in inclined section S gap

Claims (9)

車両の駆動源であるパワーユニットを前記車両の上下方向の少なくとも一方から覆うカバー本体と、前記カバー本体から前記パワーユニット側へ突出する複数の凸部と、を有するカバー部材と、
前記パワーユニットと前記カバー部材との間に配置され、前記凸部と対応する位置に凹部が形成された吸音部材と、
を備え、
前記凸部は、前記凹部の底面に当接し、
前記凸部の高さ寸法は、前記凹部の深さ寸法よりも大きく形成され、
複数の前記凸部同士の間において、前記吸音部材と前記カバー部材との間には隙間が設けられていることを特徴とするパワーユニットカバー。 A cover member having a cover main body that covers the power unit that is a drive source of the vehicle from at least one of the vertical directions of the vehicle, and a plurality of convex portions that protrude from the cover main body toward the power unit.
A sound absorbing member arranged between the power unit and the cover member and having a concave portion formed at a position corresponding to the convex portion.
With
The convex portion abuts on the bottom surface of the concave portion.
The height dimension of the convex portion is formed to be larger than the depth dimension of the concave portion.
A power unit cover, characterized in that a gap is provided between the sound absorbing member and the cover member between the plurality of convex portions. 前記凸部はリブであることを特徴とする請求項１に記載のパワーユニットカバー。 The power unit cover according to claim 1, wherein the convex portion is a rib. 前記リブは、一対の縦リブと、前記一対の縦リブと交差する一対の横リブと、を有し、
前記吸音部材は、前記一対の縦リブ及び前記一対の横リブにより囲まれた枠部に配置される膨出部を有することを特徴とする請求項２に記載のパワーユニットカバー。 The rib has a pair of vertical ribs and a pair of horizontal ribs that intersect the pair of vertical ribs.
The power unit cover according to claim 2, wherein the sound absorbing member has a bulging portion arranged in a frame portion surrounded by the pair of vertical ribs and the pair of horizontal ribs. 前記カバー本体は、前記吸音部材の周縁部に対向する位置において前記吸音部材側に突出する突出部を有し、
前記吸音部材は、前記突出部に溶着される溶着部を有することを特徴とする請求項１から請求項３のいずれか１項に記載のパワーユニットカバー。 The cover body has a protruding portion that protrudes toward the sound absorbing member at a position facing the peripheral edge of the sound absorbing member.
The power unit cover according to any one of claims 1 to 3, wherein the sound absorbing member has a welded portion to be welded to the protruding portion. 前記カバー本体は、前記上下方向に貫通する第一貫通孔を有し、
前記吸音部材は、前記上下方向に貫通する第二貫通孔を有し、
前記第一貫通孔と前記第二貫通孔とは重なるように配置されることを特徴とする請求項１から請求項４のいずれか１項に記載のパワーユニットカバー。 The cover body has a first through hole that penetrates in the vertical direction.
The sound absorbing member has a second through hole penetrating in the vertical direction.
The power unit cover according to any one of claims 1 to 4, wherein the first through hole and the second through hole are arranged so as to overlap each other. 前記第二貫通孔の外周部に設けられた開口周辺部の上面は、前記第二貫通孔から外周部へ向かうにつれて前記第二貫通孔の内形が拡大するように傾斜していることを特徴とする請求項５に記載のパワーユニットカバー。 The upper surface of the opening peripheral portion provided on the outer peripheral portion of the second through hole is characterized in that the inner shape of the second through hole is inclined so as to expand from the second through hole toward the outer peripheral portion. The power unit cover according to claim 5. 前記カバー本体は、
前記車両の前後方向に延びる水平部と、
前記水平部の前端から上方に傾斜する傾斜部と、
を備え、
前記傾斜部に設けられる前記凸部の前記車両の車幅方向における間隔は、前記水平部に設けられる前記凸部の前記車幅方向における間隔よりも狭いことを特徴とする請求項１から請求項６のいずれか１項に記載のパワーユニットカバー。 The cover body
The horizontal part extending in the front-rear direction of the vehicle and
An inclined portion that inclines upward from the front end of the horizontal portion,
With
Claims 1 to claim that the distance between the convex portions provided on the inclined portion in the vehicle width direction is narrower than the distance between the convex portions provided on the horizontal portion in the vehicle width direction. The power unit cover according to any one of 6. 前記カバー本体は、
前記車両の車幅方向の両側に設けられる側壁部と、
前記車両の前後方向において前記側壁部の前方に設けられ、前記側壁部の下端部から前記車幅方向の内側に延びるフランジ部と、
を備え、
前記カバー本体は、前記側壁部を介して前記車両の前記前後方向に延びるサイドメンバに連結されていることを特徴とする請求項１から請求項７のいずれか１項に記載のパワーユニットカバー。 The cover body
The side wall portions provided on both sides of the vehicle in the vehicle width direction and
A flange portion provided in front of the side wall portion in the front-rear direction of the vehicle and extending inward in the vehicle width direction from the lower end portion of the side wall portion.
With
The power unit cover according to any one of claims 1 to 7, wherein the cover body is connected to a side member extending in the front-rear direction of the vehicle via the side wall portion. 前記吸音部材は、前記車幅方向から見て、前記サイドメンバと重なるように配置されることを特徴とする請求項８に記載のパワーユニットカバー。 The power unit cover according to claim 8, wherein the sound absorbing member is arranged so as to overlap the side member when viewed from the vehicle width direction.
JP2019136206A 2019-07-24 2019-07-24 Power unit cover Active JP6937801B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2019136206A JP6937801B2 (en) 2019-07-24 2019-07-24 Power unit cover
CN202021322460.3U CN214057421U (en) 2019-07-24 2020-07-08 Power unit cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2019136206A JP6937801B2 (en) 2019-07-24 2019-07-24 Power unit cover

Publications (2)

Publication Number Publication Date
JP2021020482A true JP2021020482A (en) 2021-02-18
JP6937801B2 JP6937801B2 (en) 2021-09-22

Family

ID=74573234

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2019136206A Active JP6937801B2 (en) 2019-07-24 2019-07-24 Power unit cover

Country Status (2)

Country Link
JP (1) JP6937801B2 (en)
CN (1) CN214057421U (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0713573A (en) * 1993-03-17 1995-01-17 Nissan Motor Co Ltd Sound insulating plate and structure for sound insulating of vehicle
JPH1016821A (en) * 1996-07-04 1998-01-20 Toyota Motor Corp Noise insulation cover for engine
JP2012158245A (en) * 2011-01-31 2012-08-23 Kyoraku Co Ltd Sound absorbing structure for vehicle, and method for manufacturing the same
JP2012166717A (en) * 2011-02-15 2012-09-06 Kojima Press Industry Co Ltd Sound absorbing structure for vehicle exterior and sound absorbing structure of vehicle
JP2014069601A (en) * 2012-09-27 2014-04-21 Mitsubishi Motors Corp Vehicle front car body structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0713573A (en) * 1993-03-17 1995-01-17 Nissan Motor Co Ltd Sound insulating plate and structure for sound insulating of vehicle
JPH1016821A (en) * 1996-07-04 1998-01-20 Toyota Motor Corp Noise insulation cover for engine
JP2012158245A (en) * 2011-01-31 2012-08-23 Kyoraku Co Ltd Sound absorbing structure for vehicle, and method for manufacturing the same
JP2012166717A (en) * 2011-02-15 2012-09-06 Kojima Press Industry Co Ltd Sound absorbing structure for vehicle exterior and sound absorbing structure of vehicle
JP2014069601A (en) * 2012-09-27 2014-04-21 Mitsubishi Motors Corp Vehicle front car body structure

Also Published As

Publication number Publication date
JP6937801B2 (en) 2021-09-22
CN214057421U (en) 2021-08-27

Similar Documents

Publication Publication Date Title
JP4888746B2 (en) Oil pan structure
JP2004044526A (en) Engine cover
JP2019002329A (en) Suction duct module
JP2009185651A (en) Oil pan
JP6937801B2 (en) Power unit cover
JP6416944B2 (en) Suppression member
JP6566849B2 (en) Sound absorbing structure
JP4793373B2 (en) Engine cooling structure
JP2014028603A (en) Rocker molding and vehicle side part structure
JP4983690B2 (en) Sound insulation device for vehicle engine
JP2008184924A (en) Engine
JP2007055331A (en) Vibratory sound reduction structure of horn for vehicle
JP2009287436A (en) Oil pan
JP2010188842A (en) Pedestrian protection absorber for vehicle and vehicle body front part structure
US11192505B2 (en) Rocker exterior component structure
JP4146675B2 (en) Car floor structure
JP2013096238A (en) Oil pan structure
CN215097392U (en) Engine bottom guard plate structure
JP2014125071A (en) Lower part vehicle body structure for vehicle
JP4650889B2 (en) Sound barrier
JP5300138B2 (en) Engine undercover for vehicles
JP4301001B2 (en) Oil pan structure
JPH0625643Y2 (en) Engine sound insulation structure
KR200360496Y1 (en) Diffraction prevent cover for noise wall vertical cap
JP2007185993A (en) Vehicle front grill

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20200327

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20210511

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20210708

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20210803

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20210831

R150 Certificate of patent or registration of utility model

Ref document number: 6937801

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150