JPH09134179A - Shield cover device for vibration and noise generation source - Google Patents
Shield cover device for vibration and noise generation sourceInfo
- Publication number
- JPH09134179A JPH09134179A JP7288587A JP28858795A JPH09134179A JP H09134179 A JPH09134179 A JP H09134179A JP 7288587 A JP7288587 A JP 7288587A JP 28858795 A JP28858795 A JP 28858795A JP H09134179 A JPH09134179 A JP H09134179A
- Authority
- JP
- Japan
- Prior art keywords
- absorbing material
- sound absorbing
- material layer
- vibration
- density
- 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.)
- Pending
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はエンジンのような振
動・騒音発生源からの放射音を低減させるための遮蔽カ
バー装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield cover device for reducing radiated sound from a vibration / noise source such as an engine.
【０００２】[0002]
【従来の技術】環境保護のために自動車の排気ガスの浄
化と共に騒音、特にエンジンから発する騒音を低減させ
ることが要請され、各種の研究がなされている。エンジ
ンのような振動体から発する騒音を低減する手段とし
て、例えば次の構造の装置が提案されている。2. Description of the Related Art In order to protect the environment, it has been required to purify exhaust gas from automobiles and to reduce noise, particularly noise emitted from an engine, and various studies have been conducted. As a means for reducing noise generated from a vibrating body such as an engine, for example, a device having the following structure has been proposed.
【０００３】ａ）振動体の表面に吸音材層を形成し、更
にこの吸音材層の表面に遮蔽カバーを設けたカバー装置 ｂ）エンジンのオイルパンの表面、あるいはこのオイル
パンの間隔を設けて配置したオイルパンカバーの内表面
に吸音材層を設け、この吸音材層とオイルパンカバーの
内面との間、あるいはオイルパンとオイルパンカバーの
内面に設けた吸音材の内面との間に間隔をあけたカバー
装置（実開平2-37250 号公報) ｃ）エンジンのオイルパンの表面にゴムコーテイング層
を設けた装置（実開平2-147846号公報) ｄ）密度の高い材質の外面層の基層（本体）の内面に気
泡を含んだ密度の低い材質の気泡層からなる内面層を積
層して形成したオイルパン（実開平4-123349号公報)A) A cover device in which a sound absorbing material layer is formed on the surface of the vibrating body, and a shielding cover is further provided on the surface of the sound absorbing material layer. B) The surface of the oil pan of the engine or the space between the oil pans. A sound absorbing material layer is provided on the inner surface of the arranged oil pan cover, and a gap is provided between the sound absorbing material layer and the inner surface of the oil pan cover, or between the oil pan and the inner surface of the sound absorbing material provided on the inner surface of the oil pan cover. Opening cover device (Publication No. 2-37250) c) Device with a rubber coating layer on the surface of the oil pan of the engine (Publication No. 2-147846) d) Base layer of outer layer of high density material An oil pan formed by laminating an inner surface layer composed of a low density material layer containing air bubbles on the inner surface of the (main body) (Japanese Utility Model Publication No. 4-123349)
【０００４】[0004]
ａ）の構造のカバー装置において、振動体からの放射音
を低減させるには高密度の吸音材層を、振動体の表面に
密着状態で設けた構造のものが騒音特性上から有利であ
る。しかし、このような高密度で単一材質からなる吸音
材層を使用した場合は振動体と吸音材層との密着が十分
でない。その上に使用中にこの吸音材層が振動体の表面
から剥離して空間を発生して遮音特性が低下する欠点が
ある。In the cover device having the structure of a), in order to reduce the sound emitted from the vibrating body, a structure in which a high-density sound absorbing layer is provided in close contact with the surface of the vibrating body is advantageous in terms of noise characteristics. However, when such a high density and sound absorbing material layer made of a single material is used, the vibrating body and the sound absorbing material layer do not adhere sufficiently. Moreover, there is a drawback that the sound absorbing material layer separates from the surface of the vibrating body during use to generate a space and the sound insulating property is deteriorated.
【０００５】また、高密度の吸音材層を使用すると振動
体の振動が吸音材層を介して遮蔽カバーまで伝達され、
その結果、このカバー自体が振動して新たな種類の騒音
を発生する欠点がある。 ｂ）の構造のカバー装置においては、吸音材層がオイル
パンの振動防止と吸音作用に適した密度で、しかも所定
の厚みのものであることが必要であり、この吸音材層の
密度と厚さの両者を、振動体の振動特性に合わせたもの
とする必要があり、効率の良い防振と防音特性を持つも
のを得るためには多くのデータが必要であり、実施に煩
雑さを伴う。Further, when a high density sound absorbing material layer is used, the vibration of the vibrating body is transmitted to the shielding cover through the sound absorbing material layer,
As a result, there is a drawback that the cover itself vibrates to generate a new kind of noise. In the cover device having the structure of b), it is necessary that the sound absorbing material layer has a density suitable for preventing vibration of the oil pan and sound absorbing action and has a predetermined thickness. It is necessary to adjust both of them to the vibration characteristics of the vibrating body, and a lot of data is required in order to obtain those with efficient vibration and soundproofing characteristics, which complicates implementation. .
【０００６】ｃ）オイルパンの外表面にゴムのコーテイ
ング層を設けたものも、前記ｂ）の構造のカバー装置の
場合と同様に、このコーテインク層の密度と厚みとをオ
イルパンの振動特性に合わせたものとする必要があり、
優れた防振・防音機能を持つものを得ることが困難であ
る。 ｄ）オイルパンの内面に気泡を含んだ密度の低い材質よ
りなる内面層を設け、この内面層にオイルを含浸させる
ことによってマス効果とダンピング効果の両面より防振
と騒音の発生を防止するものにおいては、機械的な強度
が劣ると云う問題と、最適な特性を持つ装置を得るため
に、かなりのデータを必要とし、実用的ではない。C) In the case where a rubber coating layer is provided on the outer surface of the oil pan, the density and thickness of the coating ink layer are used to determine the vibration characteristics of the oil pan, as in the case of the cover device having the structure of b). Must be combined,
It is difficult to obtain one with excellent vibration and soundproofing functions. d) An inner surface layer made of a material having a low density containing bubbles is provided on the inner surface of the oil pan, and the inner surface layer is impregnated with oil to prevent vibration and noise from both the mass effect and the damping effect. However, in order to obtain a device having optimum mechanical properties and a problem that mechanical strength is inferior, considerable data is required, which is not practical.
【０００７】また、従来のエンジンのオイルパンには強
度上の問題からこの構造のものを適用することができな
いと云う欠点がある。前記のように各種の従来の振動・
騒音発生源の遮蔽カバー装置においては、制振と遮音の
両方の効果を得ることは実質的に困難である。即ち、吸
音材層の密度を高くすればするほど、オイルパンカバー
にまで振動を伝えて耐久性に問題があるばかりか、その
振動によって新たな振動を発生するなどの問題がある。Further, the conventional engine oil pan has a drawback in that it cannot be applied because of its strength. As mentioned above, various conventional vibrations
It is practically difficult to obtain both the effect of damping and the effect of sound insulation in the shielding cover device of the noise source. That is, as the density of the sound absorbing material layer is increased, not only the vibration is transmitted to the oil pan cover, but there is a problem in durability, and there is a problem that a new vibration is generated due to the vibration.
【０００８】この吸音材層を高密度にするほど透過音を
低減する効果があるが、その反面、次第に成形性が低下
し、特にエンジンのように振動体の表面に凹凸がある場
合には、この凹凸表面に合った吸音材層の表面形状とす
ることは困難であり、振動体や遮蔽カバーの表面が平坦
な形状でない場合は、凹凸部の隙間を生じて騒音が漏洩
すると云う問題がある。The higher the density of the sound absorbing material layer is, the more effective it is to reduce the transmitted sound. However, on the other hand, the formability is gradually lowered, and in particular, when the surface of the vibrating body is uneven like an engine, It is difficult to make the surface shape of the sound absorbing material layer that matches the uneven surface, and if the surface of the vibrating body or the shielding cover is not a flat shape, there is a problem that a gap is created in the uneven portion and noise leaks. .
【０００９】また、低密度の吸音材層は振動が伝達し難
いことから制振材としては適している反面、透過音を遮
蔽する効果が小さくなると云う問題がある。本発明は高
密度吸音材層が持つ透過音の遮蔽効果と、低密度の吸音
材層が持つ振動伝達の防止の両方の効果を利用し、更に
高密度の吸音材層の成形性の悪さを補なって振動体の表
面に押圧密着して設置することもできる、遮蔽カバー装
置を提供することを目的とするものである。Further, since the low-density sound absorbing material layer is difficult to transmit vibration, it is suitable as a vibration damping material, but there is a problem that the effect of shielding transmitted sound becomes small. The present invention utilizes both the effect of shielding the transmitted sound of the high density sound absorbing material layer and the effect of preventing vibration transmission of the low density sound absorbing material layer, and further reduces the moldability of the high density sound absorbing material layer. It is an object of the present invention to provide a shielding cover device that can be additionally installed by pressing and closely contacting the surface of the vibrating body.
【００１０】[0010]
【課題を解決するための手段】前記目的を達成する本発
明に係る振動・騒音発生源の遮蔽カバー装置は、振動体
と、この振動体を覆う遮蔽カバーを装着するとともにこ
の振動体と遮蔽カバーとの間に吸音材層を設けた遮蔽カ
バー装置であって、前記吸音材層は、少なくとも振動体
と遮蔽カバーに近接する二つの低密度の吸音材層を有
し、更にこの二つの低密度の吸音材層の間に、この吸音
材層の密度より大きな密度を持つ、少なくとも一つの吸
音材層を配置して構成されている。A shielding cover device for a vibration / noise generating source according to the present invention, which achieves the above object, is equipped with a vibrating body and a shielding cover for covering the vibrating body, and at the same time, the vibrating body and the shielding cover. And a sound-absorbing material layer provided between the sound-absorbing material layer and the sound-absorbing material layer, the sound-absorbing material layer having at least two low-density sound-absorbing material layers adjacent to the vibrating body and the shield cover. At least one sound absorbing material layer having a density higher than that of the sound absorbing material layer is arranged between the sound absorbing material layers.
【００１１】本発明に係る吸音材層は、表面が振動体の
表面に合わせた形状に形成し易い低密度の内層を形成す
る吸音材層と、遮蔽カバーの内表面に合わせた形状に成
形し易い外層を形成する低密度の吸音材層と、これらの
両低密度吸音材層の間に、密着状態で介在する、両吸音
材層よりも高密度の吸音材層とからなるサンドイッチ状
の複合構造に構成されている。The sound absorbing material layer according to the present invention is formed into a shape matching the inner surface of the shielding cover and a sound absorbing material layer forming a low density inner layer that is easy to form in a shape matching the surface of the sound absorbing body. Sandwich composite consisting of a low-density sound-absorbing material layer forming an easy outer layer, and a sound-absorbing material layer having a higher density than both sound-absorbing material layers, which are interposed between these low-density sound absorbing material layers in a close contact state. The structure is organized.
【００１２】従って、低密度吸音材層によって振動を遮
断し、中間層を形成している高密度吸音材層によって透
過音を遮断し、これらの作用によって効果的に振動・騒
音が外部に漏れるのを防止することができるものであ
る。低密度吸音材層を構成する材質は、ゴム、発泡ウレ
タン、グラスウール等であって、制振、遮音効果を有す
るものを使用することができる。Therefore, the low-density sound-absorbing material layer blocks the vibration, and the high-density sound-absorbing material layer forming the intermediate layer blocks the transmitted sound, so that the vibration and noise effectively leak to the outside. Can be prevented. The material forming the low-density sound absorbing material layer may be rubber, urethane foam, glass wool, or the like, which has a vibration damping and sound insulating effect.
【００１３】具体的には、低密度の吸音材層は、６０ｋ
ｇ／ｃｍ3 のものが適している。高密度吸音材層として
は低密度吸音材層とは異なる材質のものを原則的には使
用するが、密度を調節することによって同材質のものを
使用することができる。より遮音効果、制振効果を得る
ために、中間層として更に複数の高密度吸音材層と低密
度吸音材層を設けることができる。Specifically, the low density sound absorbing material layer is 60 k
Those of g / cm 3 are suitable. As the high-density sound-absorbing material layer, a material different from that of the low-density sound-absorbing material layer is used in principle, but the same material can be used by adjusting the density. A plurality of high-density sound absorbing material layers and low-density sound absorbing material layers can be further provided as the intermediate layer in order to obtain more sound insulating effect and vibration damping effect.
【００１４】個々の吸音材層の厚さは振動体の発する振
動の種類、カバーする面積等によって異なるが、例えば
自動車のエンジンの場合には、５〜３０ｍｍの範囲のも
のを使用するのが良い。高密度の吸音材層の両面に低密
度の吸音材層を積層して複合した吸音材層を形成する方
法は、低密度吸音材層と高密度吸音材層との間に接着剤
を部分的にあるいは全面的に使用して一体化する方法、
あるいは超音波溶接や熱接着等による点溶接や線溶接を
使用する方法がある。何れにしても、積層した構造物が
振動や騒音に対して一体的に作用するように構成するの
が良い。The thickness of each sound absorbing material layer varies depending on the type of vibration generated by the vibrating body, the area covered, and the like. For example, in the case of an automobile engine, a thickness of 5 to 30 mm is preferably used. . A method of forming a composite sound absorbing material layer by laminating low density sound absorbing material layers on both sides of a high density sound absorbing material layer is a method in which an adhesive is partially applied between the low density sound absorbing material layer and the high density sound absorbing material layer. , Or a method of integrating by using the whole surface,
Alternatively, there is a method of using spot welding or line welding by ultrasonic welding or heat bonding. In any case, it is preferable that the laminated structures act integrally on vibration and noise.
【００１５】しかし、振動体の表面を広くカバーで覆っ
た構造のものは、このカバーを利用して複合した吸音材
層を押圧して一体化することができるので、前記のよう
に超音波溶接等を使用することなく、単に押圧状態で使
用することもできる。本発明を適用する振動体として
は、エンジンのシリンダブロックが最適であるが、オイ
ルパンでも良く、その他振動体とその外面に設けた遮音
カバーと、両者の間に介在する吸音材層からなるカバー
装置を有する機械製品であれば適用が可能である。However, in the structure in which the surface of the vibrating body is widely covered with a cover, the cover can be used to press and integrate the sound absorbing material layers, so that the ultrasonic welding is performed as described above. It is also possible to simply use it in a pressed state without using such as. A cylinder block of an engine is most suitable as a vibrating body to which the present invention is applied, but an oil pan may also be used, and a cover including a vibrating body, a sound insulating cover provided on the outer surface of the vibrating body, and a sound absorbing material layer interposed therebetween. Any mechanical product having a device can be applied.
【００１６】[0016]
【発明の実施の形態】次に、図面を参照して本発明の実
施の形態を説明する。図１は振動体としてエンジンのシ
リンダブロックの場合の要部の断面図であって、振動体
１の表面に第１の低密度吸音材層２、高密度吸音材３
層、そして第２の低密度吸音材層４を積層して配置し、
更にこの吸音材層４の表面に遮蔽カバー５を配置して構
成している。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part when a cylinder block of an engine is used as a vibrating body, and a first low density sound absorbing material layer 2 and a high density sound absorbing material 3 are provided on the surface of the vibrating body 1.
Layers, and the second low-density sound-absorbing material layer 4 are laminated and arranged,
Further, a shielding cover 5 is arranged on the surface of the sound absorbing material layer 4.
【００１７】そして前記振動体１の表面に突出して形成
したボルト座６上にデイスタンスチューブ７の一端を接
当し、これを吸音材層２，３，４を貫通してあけた孔を
通し、更に遮蔽カバー５の所定の位置に設けたワッシャ
ー９とゴムワッシャー８を通し、そしてこのデイスタン
スチューブ７の他端よりワッシャー９ａと共にボルト１
０を挿通して締付けて組上げている。従って、最外表面
に配置した遮蔽カバー５をボルト１０で締結することに
よって三層の吸音材層２，３，４を一体的に積層するよ
うに押圧している。Then, one end of a distance tube 7 is brought into contact with a bolt seat 6 formed so as to project on the surface of the vibrating body 1, and this is passed through a hole formed through the sound absorbing material layers 2, 3 and 4. Further, the washer 9 and the rubber washer 8 provided at predetermined positions of the shielding cover 5 are passed through, and the bolt 1 together with the washer 9a is inserted from the other end of the distance tube 7.
It is assembled by inserting 0 and tightening. Therefore, the shielding cover 5 arranged on the outermost surface is fastened with the bolts 10 to press the three sound absorbing material layers 2, 3 and 4 so as to be integrally laminated.
【００１８】この実施の形態における第１と第２の低密
度吸音材層２，４としては、密度が６０ｋｇ／ｍ3 のグ
ラスウールで、厚さがそれぞれ５ｍｍのものを使用し、
更に高密度吸音材層３としては、密度が１２００ｋｇ／
ｃｍ3 のゴムで、厚さがそれぞれ３ｍｍのものを使用し
た。振動体であるエンジンとして排気量が８リッターの
ディーゼルエンジンを使用して回転数を１０００〜３０
００ｒｐｍの範囲に制御しながら運転してその際の騒音
の状態を測定した。As the first and second low-density sound absorbing material layers 2 and 4 in this embodiment, glass wool having a density of 60 kg / m 3 and a thickness of 5 mm is used.
Further, as the high-density sound absorbing material layer 3, the density is 1200 kg /
A cm 3 rubber having a thickness of 3 mm was used. A diesel engine with a displacement of 8 liters is used as an engine that is a vibrating body, and the rotation speed is 1000 to 30.
The operation was performed while controlling in the range of 00 rpm, and the state of noise at that time was measured.
【００１９】その結果、Ａ）防振・防音装置を配置しな
いエンジンの振動・騒音を１００とした場合を比較して
次のような結果が得られた。Ｂ）全体を低密度で、図１
の場合と同じ厚みの単一の吸音材層としたエンジンの振
動・騒音は８５％であった。これに対して、Ｃ）図１に
示す本発明の実施の形態に係る振動・騒音発生源の遮蔽
カバー装置の場合は７２％であり、振動伝達を大幅に低
減し、かつ騒音を良好に吸収できることが確認できた。As a result, the following results were obtained by comparing A) where the vibration and noise of the engine without the vibration and soundproofing device were set to 100. B) Low density on the whole, Fig. 1
The vibration and noise of the engine with a single sound absorbing material layer having the same thickness as in the above case was 85%. On the other hand, C) is 72% in the case of the vibration / noise source shielding cover device according to the embodiment of the present invention shown in FIG. 1, which significantly reduces vibration transmission and absorbs noise well. I confirmed that I can do it.
【００２０】図１に示すように、振動体１であるエンジ
ンのシリンダブロックの表面にはかなり凹凸面が形成さ
れているが、第１の低密度吸音材層２は柔軟であること
から前記凹凸面に倣って密着し、そして遮蔽カバー５に
圧接する第２の低密度吸音材層４と協動して吸音材層を
形成し、振動を低減し、更に両面の吸音材層２，４の中
間に位置する高密度吸音材層３によって透過音を減少さ
せることができることが分かる。As shown in FIG. 1, the surface of the cylinder block of the engine, which is the vibrating body 1, is considerably uneven, but since the first low density sound absorbing material layer 2 is flexible, the unevenness is provided. A sound absorbing material layer is formed in cooperation with the second low-density sound absorbing material layer 4 that comes into close contact with the surface and comes into pressure contact with the shielding cover 5 to reduce vibration, and further reduce the vibration of the sound absorbing material layers 2 and 4 on both sides. It can be seen that the transmitted sound can be reduced by the high density sound absorbing material layer 3 located in the middle.
【００２１】また、振動体の表面に押圧される低密度吸
音材層２は、遮蔽カバー５を介して押圧されて振動体の
表面に倣って賦形され密着されるので、予め型押しによ
って細部の凹凸に合わせた成形を行う必要がない。更
に、中間層を形成する高密度遮音層３は、両側の低密度
遮音層２，４の間にサンドイッチされるので、成形性を
考慮することなく十分な遮音効果を有する密度まで高め
たものを使用することができる。従って、装着性に優
れ、制振と遮音の両効果を備えた振動・騒音発生源の遮
蔽カバー装置を提供することができる。Further, the low-density sound absorbing material layer 2 pressed against the surface of the vibrating body is pressed through the shielding cover 5 and shaped and closely adhered to the surface of the vibrating body, so that details can be obtained by embossing in advance. It is not necessary to perform molding according to the unevenness of. Furthermore, since the high-density sound-insulating layer 3 forming the intermediate layer is sandwiched between the low-density sound-insulating layers 2 and 4 on both sides, it is necessary to increase the density to a sufficient sound-insulating effect without considering the moldability. Can be used. Therefore, it is possible to provide a shielding cover device for a vibration / noise generating source which is excellent in wearability and has both vibration damping and sound insulating effects.
【００２２】加えて、振動体や遮蔽カバー自体になんら
手を加えることがなく、また、吸音材層自体も従来のも
のを採用することができるので、コストアップを招くこ
ともない。In addition, since no modification is made to the vibrating body or the shielding cover itself, and the conventional sound absorbing material layer can be adopted, the cost is not increased.
【００２３】[0023]
【発明の効果】本発明に係る振動・騒音発生源の遮蔽カ
バー装置は、振動体と、この振動体を覆う遮蔽カバーを
装着するとともにこの振動体と遮蔽カバーとの間に吸音
材層を設けた遮蔽カバー装置であって、前記吸音材層
は、少なくとも振動体と遮蔽カバーに近接する二つの低
密度の吸音材層を有し、更にこの二つの低密度の吸音材
層の間に、この吸音材層の密度より大きな密度を持つ、
少なくとも一つの吸音材層を配置して構成されている。The shield cover device for a vibration / noise generating source according to the present invention is equipped with a vibrating body and a shielding cover for covering the vibrating body, and a sound absorbing material layer is provided between the vibrating body and the shielding cover. In the above shielding cover device, the sound absorbing material layer has at least two low density sound absorbing material layers adjacent to the vibrating body and the shield cover, and further, between the two low density sound absorbing material layers, Having a density greater than that of the sound absorbing material layer,
At least one sound absorbing material layer is arranged.
【００２４】従って、低密度吸音材層の制振効果と、高
密度吸音材層の遮音効果とを兼ね備えた上に、エンジン
のような振動体の凹凸表面に馴染み易く、取付作業性に
優れ、そして使用中に各層が剥離することがなく、振動
・騒音発生源の遮蔽を良好にできるカバー装置を提供す
ることができる。Therefore, in addition to having both the vibration damping effect of the low density sound absorbing material layer and the sound insulating effect of the high density sound absorbing material layer, it is easy to adapt to the uneven surface of the vibrating body such as an engine and has excellent mounting workability. Further, it is possible to provide a cover device in which each layer is not peeled off during use and the vibration / noise generation source can be well shielded.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の実施の形態に係る振動・騒音発生源の
遮蔽カバー装置をエンジンのシリンダブロックに適用し
た状態を示す要部の断面図である。FIG. 1 is a sectional view of essential parts showing a state in which a shielding cover device for a vibration / noise generating source according to an embodiment of the present invention is applied to a cylinder block of an engine.
１ エンジンのシリンダブロック ２ 第１の低密度
吸音材層 ３ 高密度吸音材層 ４ 第２の低密度
吸音材層 ５ 遮蔽カバー ６ 取付座 ７ デイスタンスチューブ ８ ゴムワッシャ
ー １０ ボルト1 Engine Cylinder Block 2 First Low Density Sound Absorbing Material Layer 3 High Density Sound Absorbing Material Layer 4 Second Low Density Sound Absorbing Material Layer 5 Shielding Cover 6 Mounting Seat 7 Distance Tube 8 Rubber Washer 10 Bolt
Claims (1)
を装着するとともにこの振動体と遮蔽カバーとの間に吸
音材層を設けた遮蔽カバー装置であって、 前記吸音材層は、少なくとも振動体と遮蔽カバーに近接
する二つの低密度の吸音材層を有し、更にこの二つの低
密度の吸音材層の間に、この吸音材層の密度より大きな
密度を持つ、少なくとも一つの吸音材層を配置した振動
・騒音発生源の遮蔽カバー装置。1. A shield cover device in which a vibrating body and a shielding cover for covering the vibrating body are mounted and a sound absorbing material layer is provided between the vibrating body and the shielding cover, wherein the sound absorbing material layer is at least At least one sound absorbing layer having two low-density sound absorbing material layers adjacent to the vibrating body and the shielding cover, and having a density greater than that of the sound absorbing material layer between the two low density sound absorbing material layers. A cover device for vibration and noise sources that has a material layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7288587A JPH09134179A (en) | 1995-11-07 | 1995-11-07 | Shield cover device for vibration and noise generation source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7288587A JPH09134179A (en) | 1995-11-07 | 1995-11-07 | Shield cover device for vibration and noise generation source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09134179A true JPH09134179A (en) | 1997-05-20 |
Family
ID=17732200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7288587A Pending JPH09134179A (en) | 1995-11-07 | 1995-11-07 | Shield cover device for vibration and noise generation source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09134179A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1186760A3 (en) * | 2000-09-06 | 2003-04-16 | Nichias Corporation | Sound absorbing structure |
| NL1019419C2 (en) * | 2001-11-23 | 2003-05-27 | Holding H J Bruin B V | Generator set e.g. for pumping water in drainage by well points has sound insulating assembly on one side of diesel engine and having synthetic foam insulating layers and steel plate |
| WO2003044366A1 (en) * | 2001-11-23 | 2003-05-30 | Holding H.J. Bruin B.V. | Sound insulation for engine |
| US6619425B2 (en) | 2001-07-11 | 2003-09-16 | Tokai Rubber Industries, Ltd. | Soundproof cover |
| DE10233888B4 (en) * | 2001-07-26 | 2004-10-07 | Tokai Rubber Industries, Ltd., Komaki | Process for making a cover and foam mold therefor |
| CN104775929A (en) * | 2015-04-16 | 2015-07-15 | 安徽江淮汽车股份有限公司 | Timing cover assembly of diesel engine |
| WO2020231102A1 (en) * | 2019-05-10 | 2020-11-19 | 한온시스템 주식회사 | Vehicle air conditioner |
-
1995
- 1995-11-07 JP JP7288587A patent/JPH09134179A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1186760A3 (en) * | 2000-09-06 | 2003-04-16 | Nichias Corporation | Sound absorbing structure |
| US6619425B2 (en) | 2001-07-11 | 2003-09-16 | Tokai Rubber Industries, Ltd. | Soundproof cover |
| DE10233888B4 (en) * | 2001-07-26 | 2004-10-07 | Tokai Rubber Industries, Ltd., Komaki | Process for making a cover and foam mold therefor |
| US7029610B2 (en) | 2001-07-26 | 2006-04-18 | Tokai Rubber Industries, Ltd. | Process for producing polyurethane-foam product molded integrally with insert and expansion-molding mold for the same |
| NL1019419C2 (en) * | 2001-11-23 | 2003-05-27 | Holding H J Bruin B V | Generator set e.g. for pumping water in drainage by well points has sound insulating assembly on one side of diesel engine and having synthetic foam insulating layers and steel plate |
| WO2003044366A1 (en) * | 2001-11-23 | 2003-05-30 | Holding H.J. Bruin B.V. | Sound insulation for engine |
| GB2397636A (en) * | 2001-11-23 | 2004-07-28 | Holding H J Bruin B V | Sound insulation for engine |
| GB2397636B (en) * | 2001-11-23 | 2005-08-10 | Holding H J Bruin B V | Sound insulation for engine |
| CN104775929A (en) * | 2015-04-16 | 2015-07-15 | 安徽江淮汽车股份有限公司 | Timing cover assembly of diesel engine |
| WO2020231102A1 (en) * | 2019-05-10 | 2020-11-19 | 한온시스템 주식회사 | Vehicle air conditioner |
| CN113811456A (en) * | 2019-05-10 | 2021-12-17 | 现代自动车株式会社 | Vehicle air conditioner |
| CN113811456B (en) * | 2019-05-10 | 2024-03-15 | 现代自动车株式会社 | Vehicle air conditioner |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |