JPS6320848Y2 - - Google Patents
Info
- Publication number
- JPS6320848Y2 JPS6320848Y2 JP1980187544U JP18754480U JPS6320848Y2 JP S6320848 Y2 JPS6320848 Y2 JP S6320848Y2 JP 1980187544 U JP1980187544 U JP 1980187544U JP 18754480 U JP18754480 U JP 18754480U JP S6320848 Y2 JPS6320848 Y2 JP S6320848Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil pan
- flange
- molded product
- body portion
- main body
- 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
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 235000008429 bread Nutrition 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Lubrication Details And Ventilation Of Internal Combustion Engines (AREA)
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Vibration Prevention Devices (AREA)
Description
【考案の詳細な説明】
この考案は、オイルパンからの放射騒音を低減
せしめた内燃機関の防振型オイルパンに関するも
のである。[Detailed Description of the Invention] This invention relates to a vibration-proof oil pan for an internal combustion engine that reduces radiated noise from the oil pan.
第１図は従来のオイルパンの構成を示す斜視図
で、オイルが収容されるオイルパン本体部分１と
その開口端にフランジ部２を、鉄板を一体プレス
成形することにより形成し、オイルパン１０を構
成したものである。このオイルパン１０はフラン
ジ部２においてガスケツトを介してシリンダブロ
ツクのスカート部にネジ結合され、内燃機関の潤
滑および冷却のためのオイルを保持している。 FIG. 1 is a perspective view showing the configuration of a conventional oil pan, in which an oil pan main body portion 1 in which oil is stored and a flange portion 2 at its open end are formed by integrally press-molding an iron plate. It is composed of The oil pan 10 is screwed to the skirt of the cylinder block through a gasket at the flange 2, and holds oil for lubricating and cooling the internal combustion engine.
このような従来のオイルパン１０は、ダンピン
グの小さい鉄板製のため非常に振動しやすい構造
であり、かつシリンダブロツクとの結合が剛であ
るためシリンダブロツクの振動が伝達されやすい
構造となつていたため、シリンダブロツクからオ
イルパン１０に振動が直接伝達されて、オイルパ
ン全面が激しく振動して大きな騒音発生源になる
という問題点があつた。そこで、騒音低域のため
に、オイルパンのフランジ部と本体部分との間に
防振帯状の防振ゴムを介装したものが提案されて
いる（実開昭50−45331号公報参照）。 Such a conventional oil pan 10 is made of a steel plate with low damping, so it has a structure that easily vibrates, and since the connection with the cylinder block is rigid, the vibration of the cylinder block is easily transmitted. However, there was a problem in that vibrations were directly transmitted from the cylinder block to the oil pan 10, causing the entire surface of the oil pan to vibrate violently and becoming a source of large noise. Therefore, in order to reduce the noise level, it has been proposed that a vibration-proofing rubber band is interposed between the flange portion of the oil pan and the main body portion (see Japanese Utility Model Application Publication No. 45331/1983).
しかしながら、このようなオイルパンを用いて
も十分に放射騒音を低減できなかつた。 However, even with the use of such an oil pan, radiated noise could not be sufficiently reduced.
この考案は、このような従来の問題点に着目し
てなされたもので、オイルパンをオイルパン本体
部分と、フランジ部をその開口端部分で水平に分
割して、断面が半円筒形状の弾性体をこの弾性体
の一端で前記フランジ部に他端で前記オイルパン
本体部分に全周にわたつて帯状に、かつ油密性を
保つて結合することによつて、弾性体および弾性
体とオイルパンのフランジ部またはオイルパン本
体部との結合部の強度を確保しつつ、シリンダブ
ロツクの振動を減衰、絶縁して、もつて騒音放射
面積の大きいオイルパン下部に振動が伝達するの
を防止することを目的とするものである。 This idea was created by focusing on these conventional problems.The oil pan is horizontally divided into the oil pan body and the flange at its open end, and an elastic structure with a semi-cylindrical cross section is created. The body is connected to the flange portion at one end of the elastic body and to the oil pan main body portion at the other end in a band shape over the entire circumference while maintaining oil tightness. While ensuring the strength of the flange of the pan or the joint with the oil pan main body, it damps and insulates the vibrations of the cylinder block, thereby preventing vibrations from being transmitted to the lower part of the oil pan where the noise radiation area is large. The purpose is to
以下、この考案を図面に基づいて詳細に説明す
る。 This invention will be explained in detail below based on the drawings.
第２図、第３図はこの考案の一実施例を示す概
観斜視図および部分拡大断面図である。これらの
図において、１および２は第１図と同じオイルパ
ン本体部分およびフランジ部であり、従来例と同
様に鉄板で構成されている。本体部分１とフラン
ジ部２との間には、全周にわたつて耐油性、耐熱
性を有し弾性体であるゴム材成形品３が介装され
全体は一体に結合され、この考案によるオイルパ
ン１１が構成されている。この結合部の詳細を第
３図のＡ−Ａ断面図に示す。 FIGS. 2 and 3 are a schematic perspective view and a partially enlarged sectional view showing an embodiment of this invention. In these figures, numerals 1 and 2 are the same oil pan body portion and flange portion as in FIG. 1, and are made of iron plates as in the conventional example. Between the main body portion 1 and the flange portion 2, a rubber molded product 3 which is an elastic body having oil resistance and heat resistance is interposed over the entire circumference, and the whole body is integrally connected. A bread 11 is configured. The details of this joint are shown in the AA sectional view of FIG.
第３図において、ゴム材成形品３は断面が半円
筒形状を呈しており、その上部および下部にはオ
イルパン本体部分１およびフランジ部２をはさみ
込むように、ゴム材フランジ部４，５が設けられ
ている。またゴム材成形品３とオイルパン本体部
分１およびフランジ部２の結合を確実にするため
に、ゴム材フランジ部４，５によつてはさまれた
オイルパン本体部分１およびフランジ部２には一
定間隔で穴６が設けられて結合時ゴム材が貫通
し、オイルパン本体部分１とフランジ部２および
各ゴム材フランジ部４，５とが強固に結合できる
ようになつている。 In FIG. 3, the rubber molded product 3 has a semi-cylindrical cross section, and rubber flange parts 4 and 5 are provided at the upper and lower parts of the molded product 3 so as to sandwich the oil pan body part 1 and the flange part 2. It is provided. In addition, in order to ensure the connection between the rubber molded product 3, the oil pan body part 1 and the flange part 2, the oil pan body part 1 and the flange part 2 sandwiched between the rubber material flange parts 4 and 5 are Holes 6 are provided at regular intervals, through which the rubber material penetrates during connection, so that the oil pan main body portion 1, flange portion 2, and each rubber flange portion 4, 5 can be firmly connected.
次に作用を説明する。フランジ部２は従来と同
様にガスケツトを介してシリンダブロツクのスカ
ート部にねじ止めされる。したがつてフランジ部
２にはシリンダブロツクの振動が直接伝達される
が、両者間に介装されたゴム材成形品３が高ダン
ピング材であるとともに、半円筒形状を呈してい
て、この断面形状が変形するのでばね定数が小さ
くなり、オイルパン本体部分１に伝達される振動
が大きく減衰、絶縁される。このため、オイルパ
ン本体部分１が振動して大きな騒音発生源となる
ことが防止される。 Next, the effect will be explained. The flange portion 2 is screwed to the skirt portion of the cylinder block via a gasket in the same manner as in the prior art. Therefore, the vibration of the cylinder block is directly transmitted to the flange portion 2, but the rubber molded product 3 interposed between the two is a high damping material and has a semi-cylindrical shape, and its cross-sectional shape is deformed, the spring constant becomes smaller, and vibrations transmitted to the oil pan main body portion 1 are greatly damped and insulated. Therefore, the oil pan main body portion 1 is prevented from vibrating and becoming a source of large noise.
また断面形状が半円筒なのでゴム材成形品３を
小さく形成することができるので、シリンダブロ
ツクのスカート部で囲まれる面積に対してオイル
パンの本体部分１の開口面積が小さくなることに
より起る内燃機関のフランク軸のカウンタウエイ
が、オイルパンと干渉するという不具合を避ける
ことができるほか、オイルパンの容量が不足する
という不具合を避けることができる。 In addition, since the cross-sectional shape is semi-cylindrical, the rubber molded product 3 can be made small, so the internal combustion caused by the opening area of the oil pan body part 1 being smaller than the area surrounded by the skirt part of the cylinder block. It is possible to avoid the problem of the engine flank shaft counterway interfering with the oil pan, and also to avoid the problem of insufficient oil pan capacity.
なお、ゴム材成形品３は上下方向の運動に関し
て、第４図に示すようにモデル化して所要寸法を
概略的に求めることができる。すなわち、第４図
ａはゴム材成形品３を内径ａ、厚さｈ、長さｌの
半円筒形と考え、上端が固定され、下端に力Ｐが
作用した場合の下端の変位をｘとしたものであ
る。この場合、Ｐ＝kx，ｋ＝9πlE｛ｈ／（ａ＋
ｈ／２）｝3／24（１−ν2）となる。ここにＫはゴム
材成形品３のばね定数、Ｅ，νはゴム材のヤング
率、ボアソン比である。また第４図ａは第４図ｂ
に示すような一自由度のばね質量系におきかえら
れ、ばねをゴム材成形品３、質量をオイルパン本
体部分１の総重量と考えて、概略的に所要寸法を
決定すればよい。ゴム材成形品３の寸法を決める
にあたつては、オイルパン本体部分の質量を支持
するために厚さを所定の厚さに確保する必要があ
る。特に自動車用内燃機関のオイルパンにこの考
案を適用した場合は、道路上の石がはねてゴム材
成形品３に衝突し損傷することを考慮して厚さを
決めなければならない。ところで、一般には厚さ
が厚くなると、ばね定数は大きくなる。したがつ
てオイルパン本体部分とフランジ部とを、水平方
向に直線状に延設する部分を備える弾性体で結合
し、この水平方向に延設する部分のせん断変形に
より振動を減衰しようとしても、十分に減衰する
ことができない。 Note that the vertical movement of the rubber molded product 3 can be modeled as shown in FIG. 4 to roughly determine the required dimensions. In other words, in Fig. 4a, the rubber molded product 3 is considered to be a semi-cylindrical shape with an inner diameter a, a thickness h, and a length l, and when the upper end is fixed and a force P is applied to the lower end, the displacement of the lower end is x. This is what I did. In this case, P=kx, k=9πlE{h/(a+
h/2)} 3 /24(1-ν 2 ). Here, K is the spring constant of the rubber molded product 3, and E and ν are the Young's modulus and Boisson's ratio of the rubber material. Also, Figure 4a is Figure 4b
Required dimensions can be roughly determined by replacing the system with a spring mass system with one degree of freedom as shown in FIG. When determining the dimensions of the rubber molded product 3, it is necessary to ensure a predetermined thickness to support the mass of the oil pan main body. Particularly when this invention is applied to the oil pan of an automobile internal combustion engine, the thickness must be determined in consideration of the possibility that stones on the road will fly off and collide with the rubber molded product 3, causing damage. By the way, in general, as the thickness increases, the spring constant increases. Therefore, even if the oil pan main body portion and the flange portion are connected by an elastic body having a portion that extends linearly in the horizontal direction, and vibrations are damped by shear deformation of the portion that extends in the horizontal direction, cannot be sufficiently damped.
しかしこの考案は前記ばね定数Ｋを求める式か
らわかるように、厚さが厚くなつてもそれに合わ
せて内径ａを大きくすれば、ばね定数Ｋが大きく
なることなく所定のばね定数値を得ることができ
るので、振動の減衰、絶縁を確実にできる。 However, as can be seen from the formula for determining the spring constant K, this idea makes it possible to obtain a predetermined spring constant value without increasing the spring constant K, even if the thickness increases, by increasing the inner diameter a accordingly. Therefore, vibration damping and insulation can be ensured.
なお、本実施例のように、ゴム材成形品３の半
円筒状の凸部がオイルパンの内側を向くように形
成すると、前記したように石がはねてゴム材成形
品３に衝突するのを防止することができる。 Note that if the semi-cylindrical convex portion of the rubber molded product 3 is formed to face the inside of the oil pan as in this embodiment, stones will fly off and collide with the rubber molded product 3 as described above. can be prevented.
以上説明したように、この考案はオイルパン本
体部分とフランジ部を分割し、断面が半円筒形状
の弾性体をこの弾性体の一端で前記フランジ部
に、他端で前記オイルパン本体部分に全周にわた
つて帯状にかつ油密性を保つて結合したので、弾
性体自体および弾性体とオイルパンのフランジ部
またはオイルパンの本体部分との結合部の強度を
確保しつつ、シリンダブロツクからの振動をゴム
材成形品で大きく減衰、絶縁することができるの
で、騒音放射面積の大きいオイルパン本体部分が
振動して騒音発生源となることを防止することが
できる。 As explained above, this invention divides the oil pan main body part and the flange part, and attaches an elastic body having a semi-cylindrical cross section to the flange part at one end and completely to the oil pan main body part at the other end. Since the elastic body is joined in a band-like manner around the circumference while maintaining oil-tightness, the strength of the elastic body itself and the joint between the elastic body and the oil pan flange or the oil pan main body is ensured, and the pressure from the cylinder block is maintained. Since vibrations can be greatly attenuated and insulated by the rubber molded product, it is possible to prevent the oil pan main body portion, which has a large noise radiation area, from vibrating and becoming a source of noise.
またゴム材成形品を小さく形成することができ
るので、クランク軸のカウンタウエイトがオイル
パンと干渉すること、およびオイルパンの容量が
不足するという不具合を避けることができる。 Furthermore, since the rubber molded product can be made small, problems such as the counterweight of the crankshaft interfering with the oil pan and insufficient capacity of the oil pan can be avoided.
第１図は従来のオイルパンの構成を示す斜視
図、第２図はこの考案の一実施例を示すオイルパ
ンの概観斜視図、第３図は第２図のＡ−Ａ線によ
る断面図、第４図ａ，ｂは第３図のゴム材成形品
の上下の運動をモデル化して説明するための図で
ある。
図中、１はオイルパン本体部分、２はフランジ
部、３はゴム材成形品、４，５はゴム材フランジ
部、６は穴、１１はオイルパンである。
FIG. 1 is a perspective view showing the structure of a conventional oil pan, FIG. 2 is an overview perspective view of an oil pan showing an embodiment of this invention, and FIG. 3 is a sectional view taken along line A-A in FIG. FIGS. 4a and 4b are diagrams for modeling and explaining the vertical movement of the rubber molded product shown in FIG. 3. In the figure, 1 is an oil pan main body part, 2 is a flange part, 3 is a rubber molded product, 4 and 5 are rubber flange parts, 6 is a hole, and 11 is an oil pan.
Claims (1)
成された鉄板製オイルパンにおいて、前記フラン
ジ部と前記オイルパン本体部分とに分割し、断面
が半円筒形状の弾性体を該弾性体の一端で前記フ
ランジ部に他端で前記オイルパン本体部分に全周
にわたつて帯状に、かつ油密性を保つて結合した
ことを特徴とする内燃機関の防振型オイルパン。 In an oil pan made of iron plate in which a flange portion is formed at the open end of the oil pan body portion, the oil pan body portion is divided into the flange portion and the oil pan body portion, and an elastic body having a semi-cylindrical cross section is attached to one end of the elastic body. 1. A vibration-proof oil pan for an internal combustion engine, characterized in that the other end of the flange portion is connected to the oil pan main body portion in a band shape over the entire circumference while maintaining oil-tightness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980187544U JPS6320848Y2 (en) | 1980-12-27 | 1980-12-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1980187544U JPS6320848Y2 (en) | 1980-12-27 | 1980-12-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57112057U JPS57112057U (en) | 1982-07-10 |
| JPS6320848Y2 true JPS6320848Y2 (en) | 1988-06-09 |
Family
ID=29990441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1980187544U Expired JPS6320848Y2 (en) | 1980-12-27 | 1980-12-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6320848Y2 (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5440324B2 (en) * | 1975-02-14 | 1979-12-03 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5371137U (en) * | 1976-11-17 | 1978-06-14 | ||
| JPS5739569Y2 (en) * | 1977-08-24 | 1982-08-31 |
-
1980
- 1980-12-27 JP JP1980187544U patent/JPS6320848Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5440324B2 (en) * | 1975-02-14 | 1979-12-03 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57112057U (en) | 1982-07-10 |
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