JPH06174103A - Mounting structure for cover or the like - Google Patents
Mounting structure for cover or the likeInfo
- Publication number
- JPH06174103A JPH06174103A JP33261392A JP33261392A JPH06174103A JP H06174103 A JPH06174103 A JP H06174103A JP 33261392 A JP33261392 A JP 33261392A JP 33261392 A JP33261392 A JP 33261392A JP H06174103 A JPH06174103 A JP H06174103A
- Authority
- JP
- Japan
- Prior art keywords
- intermediate metal
- seal member
- metal member
- covers
- elastic seal
- 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
- Gasket Seals (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、エンジン本体に取り
付けられるシリンダヘッドカバーやオイルパン等のカバ
ー類の取付構造の改良に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement in a structure for mounting covers such as a cylinder head cover and an oil pan which are mounted on an engine body.
【０００２】[0002]
【従来の技術】シリンダヘッドカバーやオイルパン等の
カバー類は、一般に複数のボルトでもってエンジン本体
に固定されており、その接合面にゴム等からなる弾性シ
ール部材が介装されている。この弾性シール部材は、油
密等の確保のためのシール機能を果たすほか、その弾性
によって防振部品として機能し、エンジン本体からカバ
ー類へ伝わる加振入力をある程度低減している。2. Description of the Related Art Covers such as a cylinder head cover and an oil pan are generally fixed to an engine body with a plurality of bolts, and an elastic seal member made of rubber or the like is interposed at a joint surface thereof. This elastic seal member not only fulfills a sealing function for ensuring oil tightness, but also functions as a vibration isolator due to its elasticity and reduces the vibration input transmitted from the engine body to the covers to some extent.
【０００３】そして実開昭６０−２６３９６号公報に
は、加振入力の伝達を更に低減させるために、カバー類
とエンジン本体との間に弾性シール部材を介装するとと
もに、取付用ボルトとカバー類との間にも弾性部材を配
して、カバー類を弾性支持するようにした構成が示され
ている。In Japanese Utility Model Laid-Open No. 60-26396, in order to further reduce the transmission of vibration input, an elastic seal member is interposed between the covers and the engine body, and a mounting bolt and a cover are also provided. There is shown a structure in which an elastic member is arranged between the covers and the covers to elastically support the covers.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記従来
の構成では、シール性を十分に確保するためには弾性シ
ール部材のばね定数をあまり低く設定できないので、防
振性能が必ずしも十分ではなく、人間の聴感特性が敏感
な１〜３ｋＨｚ付近の領域で十分な振動騒音の低減を図
ることができない。However, in the above-mentioned conventional structure, since the spring constant of the elastic seal member cannot be set too low in order to sufficiently secure the sealing property, the vibration isolation performance is not always sufficient, and the human vibration of the human body is not sufficient. It is not possible to sufficiently reduce vibration noise in the region around 1 to 3 kHz where the auditory characteristics are sensitive.
【０００５】また本出願人は、カバー類取付部での防振
性能を高めるために、弾性シール部材の厚さ方向の中間
部に中間質量体を配設することを先に提案（特願平４−
２４９０２３号）しているが、中間質量体の断面２次モ
ーメントが小さいと、騒音上問題となる周波数領域でこ
の中間質量体が弾性変形してしまい、中間質量体による
防振性能の向上効果は低下してしまう。Further, the present applicant has previously proposed that an intermediate mass body be disposed in the middle portion in the thickness direction of the elastic seal member in order to improve the vibration isolation performance at the cover mounting portion (Japanese Patent Application No. Hei 10-135242). 4-
However, if the second moment of area of the intermediate mass body is small, this intermediate mass body is elastically deformed in the frequency region where noise is a problem, and the effect of improving vibration damping performance by the intermediate mass body is Will fall.
【０００６】[0006]
【課題を解決するための手段】そこで、この発明は、弾
性シール部材の厚さ方向の中間部に中間金属部材を配設
するとともに、その断面形状の工夫により曲げ等に対す
る剛性を高めた。すなわち、この発明は、カバー類の周
縁とエンジン本体のフランジ面との間に弾性シール部材
を介装し、かつ取付用ボルトと上記カバー類との間に弾
性部材を配して上記カバー類を弾性支持してなるカバー
類の取付構造において、上記弾性シール部材の厚さ方向
の中間部に、該弾性シール部材をカバー側とエンジン本
体側とに区分するように板状をなす中間金属部材を配設
するとともに、この中間金属部材の断面形状を、断面２
次モーメントが大となるように弾性シール部材の厚さ方
向に広がった形状としたことを特徴としている。Therefore, according to the present invention, an intermediate metal member is disposed in the middle portion of the elastic seal member in the thickness direction, and the rigidity against bending is increased by devising the sectional shape. That is, according to the present invention, the elastic seal member is interposed between the peripheral edge of the covers and the flange surface of the engine body, and the elastic member is arranged between the mounting bolt and the covers to secure the covers. In a mounting structure for covers that are elastically supported, a plate-shaped intermediate metal member is provided at an intermediate portion in the thickness direction of the elastic seal member so as to divide the elastic seal member into a cover side and an engine body side. While disposing the intermediate metal member,
It is characterized in that the elastic seal member has a shape that spreads in the thickness direction so that the secondary moment becomes large.
【０００７】上記中間金属部材は、例えば、一対の側壁
の中央をベース部で連結した略Ｈ字状断面形状に構成さ
れる。あるいは、ベース部一端の側壁がカバー側へ延
び、かつ他端の側壁がエンジン本体側へ延びた略Ｓ字状
断面形状に構成される。The intermediate metal member has, for example, a substantially H-shaped cross section in which the centers of a pair of side walls are connected by a base portion. Alternatively, the side wall at one end of the base portion extends to the cover side, and the side wall at the other end extends to the engine body side to have a substantially S-shaped cross section.
【０００８】[0008]
【作用】エンジン本体に弾性支持されたカバー類の取付
構造は、ばねに相当する弾性シール部材および質量体に
相当するカバー類により一種のばね−質量系としてモデ
ル化することができるが、ばねとなる弾性シール部材の
中間部に中間金属部材を配設すれば、例えば１〜３ｋＨ
ｚといった領域で一層防振効果が高まる。The mounting structure of covers elastically supported on the engine body can be modeled as a kind of spring-mass system by elastic seal members corresponding to springs and covers corresponding to mass bodies. If an intermediate metal member is arranged in the middle of the elastic seal member,
The anti-vibration effect is further enhanced in the area such as z.
【０００９】中間金属部材は、例えば略Ｈ字状あるいは
略Ｓ字状のように弾性シール部材の厚さ方向に広がった
断面形状を有するので、単純な板状のものに比べて断面
２次モーメントが大となり、高周波領域におけるカバー
類への振動入力をいっそう低減可能である。Since the intermediate metal member has a cross-sectional shape that spreads in the thickness direction of the elastic seal member, such as a substantially H-shape or a substantially S-shape, the second moment of area is larger than that of a simple plate-shaped member. The vibration input to the covers in the high frequency region can be further reduced.
【００１０】[0010]
【実施例】以下、この発明の一実施例を図面に基づいて
詳細に説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.
【００１１】図１〜図３は、カバー類として金属板から
なるオイルパン１をエンジン本体詳しくはシリンダブロ
ック２の下縁に取り付けるオイルパン取付構造に本発明
を適用した第１実施例を示している。上記オイルパン１
の周縁にはフランジ部３が折曲形成されており、かつシ
リンダブロック２下縁にはこれと対向するようにオイル
パン取付用フランジ部４が形成されている。そして、両
フランジ部３，４の間には、矩形の枠状に連続した弾性
シール部材５が介装されている。この弾性シール部材５
は、例えばアクリルゴムを用いて枠状に成形したもので
あって、特に本実施例では、略等しい厚さとなるように
オイルパン側シール部材５Ａとシリンダブロック側シー
ル部材５Ｂの２つに分割されて成形されている。尚、各
シール部材５Ａ，５Ｂは、それぞれ平坦な略矩形の断面
形状を有している。FIGS. 1 to 3 show a first embodiment in which the present invention is applied to an oil pan mounting structure for mounting an oil pan 1 made of a metal plate as a cover on the lower edge of a cylinder block 2 of an engine body. There is. Oil pan 1 above
A flange portion 3 is bent and formed on the peripheral edge of, and an oil pan mounting flange portion 4 is formed on the lower edge of the cylinder block 2 so as to face it. An elastic seal member 5 continuous in the shape of a rectangular frame is interposed between the flange portions 3 and 4. This elastic seal member 5
Is formed into a frame shape using, for example, acrylic rubber, and in particular, in this embodiment, it is divided into two parts, an oil pan side seal member 5A and a cylinder block side seal member 5B, so as to have substantially equal thickness. Is molded. Each of the seal members 5A and 5B has a flat and substantially rectangular cross-sectional shape.
【００１２】上記オイルパン１は、フランジ部３，４間
に上記弾性シール部材５を挟んだ状態で、シリンダブロ
ック２に対し複数本の取付用ボルト６でもって固定され
ている。この取付用ボルト６は、オイルパン１のフラン
ジ部３および弾性シール部材５を貫通し、かつシリンダ
ブロック２のフランジ部４に螺合している。そして、こ
の取付用ボルト６の頭部６ａとオイルパン１のフランジ
部３との間に、弾性を有するゴムブッシュ７が介装され
ており、このゴムブッシュ７と弾性シール部材５とに挟
まれた形でオイルパン１が弾性支持されている。尚、ゴ
ムブッシュ７には座金８が重ねて配置されている。The oil pan 1 is fixed to the cylinder block 2 by a plurality of mounting bolts 6 with the elastic seal member 5 sandwiched between the flange portions 3 and 4. The mounting bolt 6 penetrates the flange portion 3 and the elastic seal member 5 of the oil pan 1 and is screwed into the flange portion 4 of the cylinder block 2. An elastic rubber bush 7 is interposed between the head portion 6a of the mounting bolt 6 and the flange portion 3 of the oil pan 1, and is sandwiched between the rubber bush 7 and the elastic seal member 5. The oil pan 1 is elastically supported in a bent shape. A washer 8 is arranged on the rubber bush 7 in an overlapping manner.
【００１３】上記弾性シール部材５の厚さ方向の中間部
つまりオイルパン側シール部材５Ａとシリンダブロック
側シール部材５Ｂとの間には、中間金属部材９が配設さ
れている。この中間金属部材９は、図３に示すように両
シール部材５Ａ，５Ｂの間に挟まれた平坦な板状のベー
ス部９ａと、弾性シール部材５の外周側の側面および内
周側の側面に沿って位置する一対の側壁９ｂ，９ｃとか
らなり、各側壁９ｂ，９ｃの中央とベース部９ａ両端と
が連続した略Ｈ字状断面形状を有している。つまりベー
ス部９ａを中心として左右の側壁９ｂ，９ｃが弾性シー
ル部材５の厚さ方向に広がっている。この中間金属部材
９は、図２に示すように、矩形の枠状に連続して鋳造さ
れており、その両面に形成される凹溝内に各シール部材
５Ａ，５Ｂが嵌合するようになっている。尚、取付用ボ
ルト６が貫通する箇所には、十分な大きさの孔が開口
し、ボルト６と干渉しないようになっている。また、図
１に示すように組み付けて取付用ボルト６を締め付けた
状態において、各シール部材５Ａ，５Ｂの表面が中間金
属部材９の側壁９ｂ，９ｃから僅かに突出しているよう
に、各部の寸法等が設定されている。An intermediate metal member 9 is disposed between the elastic seal member 5 in the thickness direction, that is, between the oil pan side seal member 5A and the cylinder block side seal member 5B. As shown in FIG. 3, the intermediate metal member 9 includes a flat plate-shaped base portion 9a sandwiched between the seal members 5A and 5B, and an outer peripheral side surface and an inner peripheral side surface of the elastic seal member 5. And a pair of side walls 9b and 9c located along the side wall 9c. The center of each side wall 9b and 9c and both ends of the base portion 9a have a substantially H-shaped cross section. That is, the left and right side walls 9b and 9c are widened in the thickness direction of the elastic seal member 5 about the base portion 9a. As shown in FIG. 2, the intermediate metal member 9 is continuously cast into a rectangular frame shape, and the seal members 5A and 5B are fitted in the recessed grooves formed on both surfaces thereof. ing. A sufficiently large hole is opened at a place where the mounting bolt 6 penetrates so that the mounting bolt 6 does not interfere with the bolt 6. In addition, as shown in FIG. 1, when the mounting bolts 6 are assembled and tightened, the surface of each seal member 5A, 5B slightly protrudes from the side walls 9b, 9c of the intermediate metal member 9, and the dimensions of each part are Etc. are set.
【００１４】上記実施例の構成においては、オイルパン
１が上述したように弾性支持されているとともに、弾性
シール部材５の厚さ方向の中間部に配設された中間金属
部材９がオイルパン１やシリンダブロック２に対し自由
に変位し得るようになっているため、この中間金属部材
９がばね−質量系における中間質量体として機能する。
例えば、図４は、この取付部における振動系をモデル化
して示したもので、オイルパン１が質量Ｍ、また、中間
金属部材の弾性変形を無視すると中間金属部材９が中間
質量体ｍに相当し、２つに区分されたシール部材５Ａ，
５Ｂがばねｋ1，ｋ2に相当する。このように、中間質量
体ｍを設けたことにより、シリンダブロック２の変位ｘ
0とオイルパン１の変位ｘ2との間で、人間の聴感特性が
敏感な周波数領域における防振性能の向上が図れる。In the structure of the above embodiment, the oil pan 1 is elastically supported as described above, and the intermediate metal member 9 disposed in the middle portion in the thickness direction of the elastic seal member 5 is the oil pan 1. The intermediate metal member 9 functions as an intermediate mass body in the spring-mass system because it can be freely displaced with respect to the cylinder block 2.
For example, FIG. 4 shows a model of the vibration system in this mounting portion, in which the oil pan 1 has a mass M, and when the elastic deformation of the intermediate metal member is ignored, the intermediate metal member 9 corresponds to the intermediate mass body m. The seal member 5A divided into two,
5B corresponds to the springs k 1 and k 2 . In this way, by providing the intermediate mass body m, the displacement x of the cylinder block 2
Between 0 and the displacement x 2 of the oil pan 1, it is possible to improve the vibration isolation performance in a frequency range where human hearing characteristics are sensitive.
【００１５】図５〜図７は、それぞれ、中間金属部材を
具備しない従来の取付構造におけるオイルパン１の振動
レベルと、中間金属部材９を設けた実施例の構成におけ
る振動レベルとの差を示したものである。これは、カバ
ー類，中間金属部材を分布定数系のＦＥＭモデルで予測
した例である。つまり、この差が０ｄＢ以上の領域で
は、中間金属部材の効果があることになる。ここで、図
５は、図８の（ａ）に示すような同相入力の振動入力モ
ードに対する特性、図６は、図８の（ｂ）に示すような
曲げ入力の振動入力モードに対する特性、図７は図８の
（ｃ）に示すような捩り入力の振動入力モードに対する
特性を示す。また、各図には、比較例として図９に示す
ように中間金属部材９を単純な板状（但し、質量は実施
例と同一とする）とした場合の特性も記してある。FIGS. 5 to 7 respectively show the difference between the vibration level of the oil pan 1 in the conventional mounting structure having no intermediate metal member and the vibration level in the configuration of the embodiment in which the intermediate metal member 9 is provided. It is a thing. This is an example of predicting the covers and the intermediate metal member by the FEM model of the distributed constant system. That is, in the region where this difference is 0 dB or more, the effect of the intermediate metal member is obtained. Here, FIG. 5 is a characteristic for a vibration input mode of in-phase input as shown in FIG. 8A, and FIG. 6 is a characteristic for a bending input mode of bending input as shown in FIG. 8B. Reference numeral 7 shows the characteristic of the torsion input with respect to the vibration input mode as shown in FIG. Further, in each drawing, as a comparative example, the characteristics in the case where the intermediate metal member 9 has a simple plate shape (however, the mass is the same as that of the embodiment) as shown in FIG. 9 are also described.
【００１６】この図５〜図７に明らかなように、中間金
属部材を単純な板状に形成した比較例のものでは、中間
金属部材を具備しない従来例に比べて、聴感特性が敏感
となる１ｋＨｚ以上の領域で防振性能の向上が見られる
が、３．２ｋＨｚ付近では、従来と同等のレベルとなっ
ている。これは、中間金属部材９が弾性変形（３．２ｋ
Ｈｚは捩りと曲げの連成モードである）するためと考え
られる。これに対し、中間金属部材９を略Ｈ字状断面形
状とした上記実施例では、中間金属部材９の断面２次モ
ーメントが３〜４倍程度向上するため、その弾性変形に
起因する防振性能の低下が回避され、図５〜図７に示す
ように、優れた防振性能が得られる。換言すれば、中間
金属部材９の剛性が向上し、その共振周波数がエンジン
騒音として問題となる周波数領域以外の領域（例えば６
ｋＨｚ付近）に移動するのである。尚、特に捩り入力に
対しては、図７に示すように、略Ｈ字状断面としたこと
による効果が広い周波数領域で得られる。実際のエンジ
ンでは、エンジンの捩りモードは７００Ｈｚ〜１．５ｋ
Ｈｚ付近に存在するが、車外騒音でも問題となるのは、
１ｋＨｚを中心とした周波数領域であるから、図７のよ
うな防振特性によって大幅な騒音低減が図れる。As is apparent from FIGS. 5 to 7, the comparative example in which the intermediate metal member is formed in a simple plate shape has a more sensitive auditory characteristic than the conventional example in which the intermediate metal member is not provided. Although the vibration isolation performance is improved in the region of 1 kHz or higher, it is at the same level as the conventional level at around 3.2 kHz. This is because the intermediate metal member 9 is elastically deformed (3.2k).
Hz is a coupled mode of torsion and bending). On the other hand, in the above-mentioned embodiment in which the intermediate metal member 9 has a substantially H-shaped cross-sectional shape, the second moment of area of the intermediate metal member 9 is improved by about 3 to 4 times, and therefore, the vibration isolation performance due to its elastic deformation is achieved. Is prevented, and excellent vibration damping performance is obtained as shown in FIGS. In other words, the rigidity of the intermediate metal member 9 is improved, and its resonance frequency is in a region other than the frequency region in which engine noise is a problem (for example, 6).
It moves to around (kHz). In particular, for torsional input, the effect of having a substantially H-shaped cross section as shown in FIG. 7 can be obtained in a wide frequency range. In the actual engine, the torsion mode of the engine is 700Hz-1.5k
Although it exists near Hz, the problem with outside noise is
Since the frequency region is centered around 1 kHz, the noise reduction can be greatly reduced by the vibration isolation characteristics as shown in FIG.
【００１７】また上記実施例のように中間金属部材９を
略Ｈ字状断面とした構成では、内周側の側壁９ｃによっ
てオイル飛沫が直接弾性シール部材５に当たるのを防止
できるため、弾性シール部材５のへたりを抑制し、長寿
命化ならびにシール性の低下防止が図れる。また、弾性
シール部材５を両側から側壁９ｂ，９ｃが押さえるた
め、ゴムのへたりに伴う横流れ現象を抑制でき、面圧低
下を防止できる。Further, in the structure in which the intermediate metal member 9 has a substantially H-shaped cross section as in the above embodiment, the inner side wall 9c can prevent oil splashes from directly hitting the elastic seal member 5, so that the elastic seal member is formed. It is possible to suppress the settling of No. 5, to prolong the service life and prevent the deterioration of the sealing property. In addition, since the side walls 9b and 9c press the elastic seal member 5 from both sides, it is possible to suppress a lateral flow phenomenon caused by the fatigue of the rubber and prevent a decrease in surface pressure.
【００１８】次に、図１０はこの発明の第２実施例を示
す。この実施例では、弾性シール部材５全体が一体に成
形されており、その内部に、略Ｈ字状断面形状をなす中
間金属部材９が埋設されている。上記中間金属部材９
は、やはりベース部９ａと一対の側壁９ｂ，９ｃとから
なり、枠状に一体に鋳造されている。この第２実施例に
よれば、前述した第１実施例のものに比べて弾性シール
部材５の取り扱いや組付が容易になるとともに、中間金
属部材９との接合面におけるシール性の問題が生じな
い。Next, FIG. 10 shows a second embodiment of the present invention. In this embodiment, the entire elastic seal member 5 is integrally molded, and an intermediate metal member 9 having a substantially H-shaped cross section is embedded inside the elastic seal member 5. The intermediate metal member 9
Is also composed of a base portion 9a and a pair of side walls 9b and 9c, and is integrally cast in a frame shape. According to the second embodiment, the elastic seal member 5 is easier to handle and assemble than that of the first embodiment described above, and a problem of sealing property at the joint surface with the intermediate metal member 9 occurs. Absent.
【００１９】図１１は、この発明の第３実施例を示す。
この実施例では、一体に成形された弾性シール部材５の
内部に、略Ｖ字状断面形状をなす中間金属部材９が埋設
されている。つまり略Ｖ字状に折曲した一対の傾斜壁９
ｄ，９ｅがそれぞれ弾性シール部材５の厚さ方向に斜め
に広がっており、これによって断面２次モーメントが大
きく確保されている。この実施例によれば、中間金属部
材９の加工が容易となり、例えばプレス加工による形成
も可能となる。FIG. 11 shows a third embodiment of the present invention.
In this embodiment, an intermediate metal member 9 having a substantially V-shaped cross section is embedded inside the integrally molded elastic seal member 5. That is, a pair of inclined walls 9 bent in a substantially V shape.
d and 9e respectively spread obliquely in the thickness direction of the elastic seal member 5, whereby a large moment of inertia of area is secured. According to this embodiment, the intermediate metal member 9 can be easily processed and can be formed by, for example, pressing.
【００２０】図１２は、この発明の第４実施例を示す。
この実施例では、中間金属部材９が、内周側の側壁９ｃ
とベース部９ａとからなる略Ｔ字状断面形状をなしてお
り、第１実施例と同様にオイルパン側シール部材５Ａと
シリンダブロック側シール部材５Ｂとの間に挾持されて
いる。特に、上記中間金属部材９は、プレス成形した断
面略Ｌ字形をなす２枚の金属板からなり、内周側の接合
部９ｆでもって互いに溶接してある。FIG. 12 shows a fourth embodiment of the present invention.
In this embodiment, the intermediate metal member 9 is the inner peripheral side wall 9c.
And a base portion 9a, and has a substantially T-shaped cross section, and is sandwiched between the oil pan side seal member 5A and the cylinder block side seal member 5B as in the first embodiment. In particular, the intermediate metal member 9 is composed of two metal plates having a substantially L-shaped cross-section that are press-molded, and they are welded to each other at the joint portion 9f on the inner peripheral side.
【００２１】図１３は、この発明の第５実施例を示す。
この実施例では、中間金属部材９が第１実施例と同様の
略Ｈ字状断面形状をなしているが、上記第４実施例と同
様に、プレス成形した断面略コ字状をなす２枚の金属板
から構成されており、内周側および外周側の接合部９
ｆ，９ｇでもって互いに溶接してある。FIG. 13 shows a fifth embodiment of the present invention.
In this embodiment, the intermediate metal member 9 has a substantially H-shaped cross-sectional shape similar to that of the first embodiment, but as in the fourth embodiment, two press-formed substantially U-shaped cross-sections are formed. Which is composed of a metal plate, and has inner and outer joints 9
They are welded together with f and 9g.
【００２２】図１４は、この発明の第６実施例を示す。
この実施例では、中間金属部材９が１枚の金属板をプレ
ス成形して形成されている。すなわち、ベース部９ａの
内周側の端部を側壁９ｈとしてシリンダブロック２側に
直角に折曲するとともに、外周側の端部を側壁９ｉとし
てオイルパン１側に直角に折曲してあり、全体として略
Ｓ字状断面形状に構成されている。弾性シール部材５
は、オイルパン側シール部材５Ａとシリンダブロック側
シール部材５Ｂとに分割されている。この実施例によれ
ば、断面２次モーメントを十分に大きく確保できるとと
もに、プレス成形による形成が可能であり、かつ第４実
施例，第５実施例のような溶接も不要である。従って、
非常に低コストに構成できる。FIG. 14 shows a sixth embodiment of the present invention.
In this embodiment, the intermediate metal member 9 is formed by press forming a single metal plate. That is, the inner peripheral end of the base portion 9a is bent at a right angle to the cylinder block 2 side as a side wall 9h, and the outer peripheral end is bent at a right angle to the oil pan 1 side as a side wall 9i. As a whole, it has a substantially S-shaped cross section. Elastic seal member 5
Is divided into an oil pan side seal member 5A and a cylinder block side seal member 5B. According to this embodiment, it is possible to secure a sufficiently large second moment of area, press forming is possible, and welding as in the fourth and fifth embodiments is not necessary. Therefore,
It can be constructed at a very low cost.
【００２３】以上、シリンダブロックに対して弾性支持
されるオイルパンについて説明したが、エンジン本体で
あるシリンダヘッドに対して弾性支持されるカバー類と
してのシリンダヘッドカバーについて、適用することも
可能である。Although the oil pan elastically supported by the cylinder block has been described above, the invention is also applicable to a cylinder head cover as a cover elastically supported by the cylinder head which is the engine body.
【００２４】[0024]
【発明の効果】以上の説明で明らかなように、この発明
に係るカバー類の取付構造によれば、弾性シール部材の
厚さ方向の中間部に中間金属部材を配設することで、エ
ンジン本体とカバー類との間の防振性能を高めることが
できる。特に、中間金属部材を略Ｈ字状断面形状あるい
は略Ｓ字状断面形状等のように弾性シール部材の厚さ方
向に広がった形状とすることにより該中間金属部材の剛
性が高まるため、中間金属部材の共振による防振性能の
低下を防止でき、人間の聴感特性の上で問題となる周波
数領域での防振性能が一層向上する。従って、カバー類
から２次的に放射される騒音を大幅に低減できる。As is apparent from the above description, according to the cover mounting structure of the present invention, by disposing the intermediate metal member at the intermediate portion in the thickness direction of the elastic seal member, the engine main body is provided. The anti-vibration performance between the cover and the covers can be improved. In particular, the rigidity of the intermediate metal member is increased by forming the intermediate metal member into a shape that is spread in the thickness direction of the elastic seal member, such as a substantially H-shaped cross-sectional shape or a substantially S-shaped cross-sectional shape. It is possible to prevent the deterioration of the vibration isolation performance due to the resonance of the member, and further improve the vibration isolation performance in the frequency range which is a problem for human hearing characteristics. Therefore, the noise secondarily radiated from the covers can be significantly reduced.
【図１】この発明の第１実施例を示すエンジン要部の断
面図。FIG. 1 is a sectional view of an essential part of an engine showing a first embodiment of the present invention.
【図２】この第１実施例の取付構造を示す分解斜視図。FIG. 2 is an exploded perspective view showing the mounting structure of the first embodiment.
【図３】第１実施例の要部を示す断面図。FIG. 3 is a sectional view showing a main part of the first embodiment.
【図４】この実施例の振動モデルを示す説明図。FIG. 4 is an explanatory view showing a vibration model of this embodiment.
【図５】同相入力に対し中間金属部材を具備しない従来
のものとの振動レベルの差を示す特性図。FIG. 5 is a characteristic diagram showing a difference in vibration level with respect to an in-phase input and a conventional one having no intermediate metal member.
【図６】曲げ入力に対し中間金属部材を具備しない従来
のものとの振動レベルの差を示す特性図。FIG. 6 is a characteristic diagram showing a difference in vibration level between a bending input and a conventional one that does not include an intermediate metal member.
【図７】捩り入力に対し中間金属部材を具備しない従来
のものとの振動レベルの差を示す特性図。FIG. 7 is a characteristic diagram showing a difference in vibration level with respect to a conventional one that does not include an intermediate metal member with respect to a twist input.
【図８】振動入力モードを示す説明図。FIG. 8 is an explanatory diagram showing a vibration input mode.
【図９】中間金属部材を単純な板状とした比較例の断面
図。FIG. 9 is a cross-sectional view of a comparative example in which the intermediate metal member has a simple plate shape.
【図１０】この発明の第２実施例を示す要部の断面図。FIG. 10 is a sectional view of a main portion showing a second embodiment of the present invention.
【図１１】この発明の第３実施例を示す要部の断面図。FIG. 11 is a cross-sectional view of the essential parts showing the third embodiment of the present invention.
【図１２】この発明の第４実施例を示す要部の断面図。FIG. 12 is a sectional view of the essential parts showing a fourth embodiment of the present invention.
【図１３】この発明の第５実施例を示す要部の断面図。FIG. 13 is a sectional view of the essential parts showing a fifth embodiment of the present invention.
【図１４】この発明の第６実施例を示す要部の断面図。FIG. 14 is a sectional view of the essential parts showing a sixth embodiment of the present invention.
１…オイルパン ２…シリンダブロック ５…弾性シール部材 ７…ゴムブッシュ ９…中間金属部材 1 ... Oil Pan 2 ... Cylinder Block 5 ... Elastic Seal Member 7 ... Rubber Bushing 9 ... Intermediate Metal Member
Claims (3)
ジ面との間に弾性シール部材を介装し、かつ取付用ボル
トと上記カバー類との間に弾性部材を配して上記カバー
類を弾性支持してなるカバー類の取付構造において、上
記弾性シール部材の厚さ方向の中間部に、該弾性シール
部材をカバー側とエンジン本体側とに区分するように板
状をなす中間金属部材を配設するとともに、この中間金
属部材の断面形状を、断面２次モーメントが大となるよ
うに弾性シール部材の厚さ方向に広がった形状としたこ
とを特徴とするカバー類の取付構造。1. An elastic seal member is interposed between the peripheral edge of the covers and the flange surface of the engine body, and an elastic member is arranged between the mounting bolt and the covers to elastically cover the covers. In the mounting structure of the covers to be supported, a plate-shaped intermediate metal member is arranged at the intermediate portion in the thickness direction of the elastic seal member so as to divide the elastic seal member into the cover side and the engine body side. A mounting structure for covers, wherein the intermediate metal member is provided with a cross-sectional shape that is widened in the thickness direction of the elastic seal member so that the second moment of area is large.
略Ｈ字状断面形状に上記中間金属部材が構成されている
ことを特徴とする請求項１記載のカバー類の取付構造。2. The mounting structure for covers according to claim 1, wherein the intermediate metal member is formed in a substantially H-shaped cross-sectional shape in which the centers of a pair of side walls are connected by a base portion.
かつ他端の側壁がエンジン本体側へ延びた略Ｓ字状断面
形状に上記中間金属部材が構成されていることを特徴と
する請求項１記載のカバー類の取付構造。3. The side wall at one end of the base portion extends toward the cover,
The mounting structure for covers according to claim 1, wherein the intermediate metal member is formed in a substantially S-shaped cross-section whose side wall at the other end extends toward the engine body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33261392A JPH06174103A (en) | 1992-12-14 | 1992-12-14 | Mounting structure for cover or the like |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33261392A JPH06174103A (en) | 1992-12-14 | 1992-12-14 | Mounting structure for cover or the like |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06174103A true JPH06174103A (en) | 1994-06-24 |
Family
ID=18256907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33261392A Pending JPH06174103A (en) | 1992-12-14 | 1992-12-14 | Mounting structure for cover or the like |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06174103A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4814908A (en) * | 1986-12-03 | 1989-03-21 | Magnetic Peripherals Inc. | Thermo servo for track centering on a disk |
| US4870520A (en) * | 1986-05-29 | 1989-09-26 | Magnetic Peripherals Inc. | Read/write head with side winding slot |
-
1992
- 1992-12-14 JP JP33261392A patent/JPH06174103A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4870520A (en) * | 1986-05-29 | 1989-09-26 | Magnetic Peripherals Inc. | Read/write head with side winding slot |
| US4814908A (en) * | 1986-12-03 | 1989-03-21 | Magnetic Peripherals Inc. | Thermo servo for track centering on a disk |
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