JP2730126B2 - Soundproof cover - Google Patents
Soundproof coverInfo
- Publication number
- JP2730126B2 JP2730126B2 JP1016463A JP1646389A JP2730126B2 JP 2730126 B2 JP2730126 B2 JP 2730126B2 JP 1016463 A JP1016463 A JP 1016463A JP 1646389 A JP1646389 A JP 1646389A JP 2730126 B2 JP2730126 B2 JP 2730126B2
- Authority
- JP
- Japan
- Prior art keywords
- cover
- soundproofing
- vibration
- soundproof
- covers
- 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.)
- Expired - Fee Related
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B67/00—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for
- F02B67/04—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus
- F02B67/06—Engines characterised by the arrangement of auxiliary apparatus not being otherwise provided for, e.g. the apparatus having different functions; Driving auxiliary apparatus from engines, not otherwise provided for of mechanically-driven auxiliary apparatus driven by means of chains, belts, or like endless members
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、騒音源の遮音を図る防音カバーに係り、
特に防音カバーを多重に形成してその防音性能を向上さ
せた防音カバーに関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a soundproof cover for insulating a noise source.
In particular, the present invention relates to a soundproof cover in which soundproof performance is improved by forming multiple soundproof covers.
［従来の技術］ 騒音源を覆って防音を図るカバーとしては、第４図に
示すように、樹脂性のシリンダヘッドカバーａの外面に
金属製の被覆カバーｃを被着してシリンダヘッドカバー
ａの剛性を全体的に向上し、透過音を遮断するように構
成した防音カバーが知られている。（「ロッカケース構
造」（実開昭58−70441号公報）等）。[Prior Art] As shown in FIG. 4, as a cover for covering a noise source and providing sound insulation, a metal covering cover c is attached to an outer surface of a resin cylinder head cover a so that the rigidity of the cylinder head cover a is increased. There is known a soundproof cover configured so as to improve the overall performance and block transmitted sound. ("Rocker case structure" (Japanese Utility Model Application Laid-Open No. 58-70441)).
［発明が解決しようとする課題］ しかし、本出願人は、騒音の対策としては全体的に遮
音カバーの剛性を上げる必要がなく、部分的に面振動の
激しい部分のみを遮音するだけで大きな防音効果を向上
できることを見出だした。[Problems to be Solved by the Invention] However, as a measure against noise, the present applicant does not need to increase the rigidity of the sound insulation cover as a whole, but only partially shields a portion where surface vibration is intense. It has been found that the effect can be improved.
そこでこの発明は、遮音カバーの面振動の激しい部分
を覆って透過音を減少させる新規な防音カバを提供する
ことを目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a novel soundproof cover that covers a portion of a sound insulating cover where surface vibration is severe and reduces transmitted sound.
［課題を解決するための手段］ この発明は、ベルトプーリー等の騒音源に覆い被せる
遮音カバーの面振動の腹に外方へ突出する支持部を形成
し、遮音カバーに、上記支持部に支持されてその遮音カ
バーの外面上に空隙を有してその遮音カバーの面振動部
を覆う剛性カバーを一体的に取付けて防音カバーを構成
したものである。Means for Solving the Problems According to the present invention, a support portion projecting outward is formed on an antinode of surface vibration of a sound insulation cover that covers a noise source such as a belt pulley, and is supported on the sound insulation cover by the support portion. In addition, a rigid cover having an air gap on the outer surface of the sound insulating cover and covering a surface vibrating portion of the sound insulating cover is integrally attached to constitute the sound insulating cover.
［作用］ 剛性カバーは遮音カバーの面振動の腹の支持部に支持
されてその遮音カバーの外面上に空隙を有して被覆す
る。すると、支持部を介して遮音カバーの面振動が抑制
される。つまり、面振動の激しい部分の剛性が向上し、
透過音を遮断できる。[Operation] The rigid cover is supported by the support portion of the anti-surface vibration antinode of the sound insulating cover, and covers the outer surface of the sound insulating cover with a gap. Then, the surface vibration of the sound insulation cover is suppressed via the support portion. In other words, the rigidity of the part where the surface vibration is severe is improved,
The transmitted sound can be cut off.
［実施例］ 以下にこの発明の好適一実施例を添付図面に基づいて
説明する。Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.
騒音源としては種々あるがこの実施例ではエンジンの
タイミングベルト及びタイミングプーリーに覆い被せる
防音カバーを説明する。Although there are various noise sources, in this embodiment, a soundproof cover which covers the timing belt and the timing pulley of the engine will be described.
まず、第３図に示すように一様断面で形成したタイミ
ングベルト用の遮音カバー１の面振動を調べると、特
に、タイミングベルトプーリー２の駆動軸上の部分（以
下面振動部という）３が激しく、振動に対して面振動部
３の剛性が大きく不足がちであることを知ることができ
る。遮音カバー１はザイテル22C等で形成される。First, when the surface vibration of the sound insulating cover 1 for a timing belt formed with a uniform cross section as shown in FIG. 3 is examined, in particular, a portion (hereinafter referred to as a surface vibration portion) 3 on a drive shaft of the timing belt pulley 2 is found. It can be seen that the rigidity of the surface vibrating part 3 is severe with respect to the vibration and tends to be insufficient. The sound insulation cover 1 is formed of Zytel 22C or the like.
そこで、この実施例にあっては、上記面振動部３の剛
性を増し、かつ、その面振動部３の防音を図ることで遮
音カバー１の防音効果の向上を図る。Therefore, in the present embodiment, the rigidity of the surface vibrating portion 3 is increased, and the soundproofing effect of the sound insulating cover 1 is improved by soundproofing the surface vibrating portion 3.
つまり、第１図に示すように、遮音カバー１の面振動
部３の振動の腹４に、支持部材を立設する。That is, as shown in FIG. 1, a support member is erected on the antinode 4 of the vibration of the surface vibration part 3 of the sound insulation cover 1.
実施例にあって支持部材は、緩やかな曲率と頂面を形
成する頭部５を有した支持ボルト６と、この支持ボルト
６が螺合するナット７と、その支持ボルト６を上記面振
動部材３から一定の高さに固定するカラー部材８とから
なる。つまり、上記面振動部３の振動の腹４にボルト穴
９を形成し、そのボルト穴９に、上記カラー部材８に挿
入した状態でそのボルト穴９に支持ボルト６のねじ部を
挿入し、遮音カバー１の内面側のナット７を、そのねじ
部に螺合すると、支持ボルト６は、上記面振動部に対し
上記頭部５を一定の高さに位置させる。In the embodiment, the supporting member includes a supporting bolt 6 having a head portion 5 forming a gentle curvature and a top surface, a nut 7 to which the supporting bolt 6 is screwed, and the supporting bolt 6 is formed by the above-mentioned surface vibration member. 3 and a collar member 8 fixed at a certain height. That is, a bolt hole 9 is formed in the antinode 4 of the vibration of the surface vibrating portion 3, and the threaded portion of the support bolt 6 is inserted into the bolt hole 9 while being inserted into the collar member 8. When the nut 7 on the inner surface side of the sound insulating cover 1 is screwed into the screw portion, the support bolt 6 positions the head 5 at a fixed height with respect to the surface vibrating portion.
さらに、この頭部５に支持させて剛性カバー10を取り
付ける。剛性カバー10は、金属、剛性の高い樹脂材料等
から形成するが、遮音カバー１に対して剛性が適正に高
ければその材質は問わない。実施例にあって剛性カバー
10は、上記タイミングベルトプーリ２とほぼ同一直径の
腕状カバーとして成形され、その外縁部12に円周方向に
沿ってゴム等からなる断面コ字形の緩衝リング13が嵌め
込まれて、剛性カバー10の中心の内面を上記頭部５に支
持させた状態で上記遮音カバー１に一体的に取り付けら
れる。この取付けは種々あるが例えば、接着、上記遮音
カバー１の外面、剛性カバー10の内面に接するカラー部
材をかしめる、リベット止め，上記剛性カバの内面に立
設した脚部を上記遮音カバーの外面に溶接するなどのい
ずれかによってなされる。Further, a rigid cover 10 is attached so as to be supported by the head 5. The rigid cover 10 is formed of a metal, a resin material having high rigidity, or the like, but any material may be used as long as the rigidity of the sound insulating cover 1 is appropriately high. Rigid cover in the embodiment
10 is formed as an arm-shaped cover having substantially the same diameter as that of the timing belt pulley 2, and a cushioning ring 13 made of rubber or the like is fitted around its outer edge 12 along the circumferential direction to form a rigid cover 10. Are attached integrally to the sound insulating cover 1 with the center inner surface supported by the head 5. There are various types of attachment, for example, bonding, caulking a collar member in contact with the outer surface of the sound insulating cover 1 and the inner surface of the rigid cover 10, riveting, and attaching a leg standing on the inner surface of the rigid cover to the outer surface of the sound insulating cover. Or by welding.
第２図は、遮音カバー１のみの場合の防音性能Ｉ、遮
音カバーの肉厚を増した場合の防音性能II、遮音カバー
１と剛性カバー10からなる本発明の防音カバーの防音性
能III（いずれも前後左右1mにおける平均防音性能を示
す）のテストデータを示すものであり、このデータか
ら、遮音カバー１の肉厚を増して防音を図っても大きな
防音効果を得ることが困難であること、本発明のように
面振動部３の腹４の剛性を増し、面振動部３を部分的に
防音すると大きな防音効果を得ることができることを確
認できる。FIG. 2 shows the soundproofing performance I when only the soundproofing cover 1 is used, the soundproofing performance II when the thickness of the soundproofing cover is increased, and the soundproofing performance III of the soundproofing cover of the present invention comprising the soundproofing cover 1 and the rigid cover 10. Also shows the average soundproof performance at 1 m in front, back, left and right). From this data, it is difficult to obtain a large soundproofing effect even if the thickness of the sound insulating cover 1 is increased to achieve soundproofing. It can be confirmed that a large soundproofing effect can be obtained by increasing the rigidity of the antinode 4 of the surface vibrating portion 3 and partially soundproofing the surface vibrating portion 3 as in the present invention.
以上実施例は、遮音カバー１のタイミングベルトプー
リの防音を図る説明をしたが、燃料噴射ポンプのプーリ
や、動力伝達用スプロケッット等の遮音カバーそして、
シリンダヘッドカバーにおける面振動部を、これらを適
正に覆うように成形した剛性カバーで覆い、かつ、これ
らの面振動部の腹に両カバーに接する支持部材を設ける
ように構成すると上記と同様の効果をえることが可能で
その適用は広範囲にわたる。In the above embodiment, the soundproofing of the timing belt pulley of the soundproofing cover 1 has been described. However, the soundproofing cover such as the pulley of the fuel injection pump, the sprocket for power transmission, and the like.
The same effect as described above can be achieved by covering the surface vibration portions of the cylinder head cover with a rigid cover formed so as to cover them properly, and providing a support member in contact with both covers on the antinodes of these surface vibration portions. And its application is widespread.
尚、上記支持ボルトを段付きボルトとし、カラー部材
を不要とすること、支持ボルトを段付きのリベットとす
ることも当然可能である。It should be noted that it is naturally possible to use a stepped bolt as the support bolt, eliminate the need for a collar member, and use a stepped rivet as the support bolt.
［発明の効果］ 以上説明したことから明らかなようにこの発明によれ
ば次の如き優れた効果を発揮する。[Effects of the Invention] As is clear from the above description, according to the present invention, the following excellent effects are exhibited.
ベルトプーリー等の騒音源に覆い被せる遮音カバーの
振動の腹に外方へ突出する支持部を形成し、遮音カバー
に、上記支持部に支持されてその遮音カバーの面振動部
を覆う剛性カバーを一体的に取付けたから、良好な防音
を図りつつ面積的に防音効率を向上できる。A support portion projecting outward is formed on the antinode of the vibration of the sound insulation cover that covers the noise source such as a belt pulley, and the rigid cover that is supported by the support portion and covers the surface vibration portion of the sound insulation cover is formed on the sound insulation cover. Since they are integrally mounted, the soundproofing efficiency can be improved in terms of area while achieving good soundproofing.
第１図はこの発明の好適一実施例を示す断面図、第２図
は防音性能のテストデータを示す図、第３図は遮音カバ
ーの面振動を示す断面図、第４図は従来例を示す断面図
である。 図中、１は遮音カバー、３は面振動部、４は腹、６は支
持ボルト、10は剛性カバーである。FIG. 1 is a sectional view showing a preferred embodiment of the present invention, FIG. 2 is a view showing test data of soundproof performance, FIG. 3 is a sectional view showing surface vibration of a sound insulating cover, and FIG. FIG. In the figure, 1 is a sound insulation cover, 3 is a surface vibrating part, 4 is a belly, 6 is a support bolt, and 10 is a rigid cover.
Claims (1)
音カバーの振動の腹に外方へ突出する支持部を形成し、
遮音カバーに、上記支持部に支持されてその遮音カバー
の外面上に空隙を有してその遮音カバーの面振動部を覆
う剛性カバーを一体的に取付けたことを特徴とする防音
カバー。1. A supporting portion which protrudes outward is formed on an antinode of vibration of a sound insulation cover which covers a noise source such as a belt pulley.
A soundproof cover, wherein a rigid cover that is supported by the support portion and has a gap on an outer surface of the soundproof cover and covers a surface vibrating portion of the soundproof cover is integrally attached to the soundproof cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1016463A JP2730126B2 (en) | 1989-01-27 | 1989-01-27 | Soundproof cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1016463A JP2730126B2 (en) | 1989-01-27 | 1989-01-27 | Soundproof cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02199227A JPH02199227A (en) | 1990-08-07 |
| JP2730126B2 true JP2730126B2 (en) | 1998-03-25 |
Family
ID=11916947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1016463A Expired - Fee Related JP2730126B2 (en) | 1989-01-27 | 1989-01-27 | Soundproof cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2730126B2 (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0786327B2 (en) * | 1986-04-07 | 1995-09-20 | 本田技研工業株式会社 | engine |
-
1989
- 1989-01-27 JP JP1016463A patent/JP2730126B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02199227A (en) | 1990-08-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |