JP4326293B2 - Sealing structure - Google Patents

Sealing structure Download PDF

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JP4326293B2
JP4326293B2 JP2003322789A JP2003322789A JP4326293B2 JP 4326293 B2 JP4326293 B2 JP 4326293B2 JP 2003322789 A JP2003322789 A JP 2003322789A JP 2003322789 A JP2003322789 A JP 2003322789A JP 4326293 B2 JP4326293 B2 JP 4326293B2
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oil pan
gasket
block member
annular bead
sealing ring
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JP2005090572A (en
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温 佐藤
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Uchiyama Manufacturing Corp
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Uchiyama Manufacturing Corp
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Description

本発明は、内燃機関あるいは自動変速機などに用いられるオイルパンの密封構造に関し、具体的には密封するブロック部材とフランジ部に環状ビードを有するオイルパンとオイルパンガスケットからなる密封構造に関する。 The present invention relates to a sealing structure for an oil pan used in an internal combustion engine, an automatic transmission, or the like, and specifically relates to a sealing structure including an oil pan having an annular bead on a flange member and a block member to be sealed, and an oil pan gasket.

従来より、車両のエンジンのシリンダブロックあるいはトランスミッションケース等の下部には、それぞれ潤滑油等を蓄えるオイルパンが取り付けられている。
この種のオイルパンとしては制振鋼板からなり、そのフランジ部へボルト取り付け孔を含むビード部が形成されており、該フランジ部へガスケットを装着してブロック部材へ取付け締付けされていた。
このビード部の形成は、オイルパンのフランジ部の強度を高めるためだけでなく、弾性体からなるオイルパンガスケットの局部面圧を高め密封性能を向上させる役割をなさしめていた。一般的には、軽量化とか成形の容易性などから１．２〜１．６ｍｍ厚みの制振鋼板を用いて、これに曲げ・絞り加工を施してオイルパンを形成している。 Conventionally, an oil pan for storing lubricating oil or the like is attached to the lower part of a cylinder block or transmission case of a vehicle engine.
This type of oil pan is made of a vibration-damping steel plate, and a bead portion including a bolt mounting hole is formed in the flange portion, and a gasket is attached to the flange portion and is fastened to a block member.
The formation of the bead portion has not only increased the strength of the flange portion of the oil pan, but also has a role of increasing the local surface pressure of the oil pan gasket made of an elastic body and improving the sealing performance. In general, an oil pan is formed by using a damping steel plate having a thickness of 1.2 to 1.6 mm for weight reduction or ease of forming and bending and drawing the steel plate.

また、ガスケット部材としては、古くはコルク粒を接着剤で固め形成したコルクガスケット、あるいはラバーを主成分とする弾性ガスケット、さらには不定形で密封部材へ塗布し密着させた後に硬化形成する液状ガスケットなどが用いられている。近年では金属板と弾性体とを組み合わせた複合ガスケットが開発され実用に付されている。
実開昭６１−１３４５４８号公報 In addition, as a gasket member, a cork gasket in which cork grains are hardened with an adhesive in the past, an elastic gasket mainly composed of rubber, or a liquid gasket that is hardened after being applied to a sealing member in an indeterminate form. Etc. are used. In recent years, composite gaskets combining metal plates and elastic bodies have been developed and put into practical use.
Japanese Utility Model Publication No. 61-134548

特許文献１に示されたオイルパンガスケットにおいては、平面的なフランジ部を有するオイルパンに適用され、オイルパンガスケットを構成する金属製平板材は、両シール面に設けたビード条を支える役割しか有さず、ビード条への圧縮に対してその形状維持と横流れ防止を期待するものでしかない。
すなわち、ブロック部材とオイルパンのフランジとの密封作用は弾性体でなるビード条のみによる。 The oil pan gasket disclosed in Patent Document 1 is applied to an oil pan having a flat flange portion, and the metal flat plate constituting the oil pan gasket serves only to support the bead strips provided on both seal surfaces. It is only expected to maintain its shape and prevent cross flow against compression into the bead strip.
That is, the sealing action between the block member and the flange of the oil pan is based only on the bead strip made of an elastic body.

このように金属製平板材と組み合わされてはいても弾性体の反発特性に頼るオイルパンガスケットでは、応力緩和、ヘタリが大きく弾性体のトルクダウンや洩れにつながり、充分な機能を果たし得なかった。   Even when combined with a metal flat plate, the oil pan gasket that relies on the resilience characteristics of the elastic body has a large stress relief and setback, leading to torque reduction and leakage of the elastic body and failing to perform its full function. .

請求項１の密封構造は、平面部へ環状ビードを設けたフランジ部を有するオイルパンと、前記フランジ部とブロック部材との間に挟着されるオイルパンガスケットからなる密封構造であって、前記オイルパンガスケットの本体部を金属板で形成し、前記本体部の両周縁部に弾性体からなる密封環を形成せしめ、前記フランジ部の環状ビードへ前記オイルパンガスケットの本体部を配置すると共に、前記オイルパンガスケットの本体部はブロック部材と環状ビードに密着して圧縮され、前記フランジ部の平面部へ前記密封環を配置せしめたことを特徴とする。 The sealing structure of claim 1 is a sealing structure comprising an oil pan having a flange portion provided with an annular bead on a flat surface portion, and an oil pan gasket sandwiched between the flange portion and a block member, The body part of the oil pan gasket is formed of a metal plate, a sealing ring made of an elastic body is formed on both peripheral parts of the body part, and the body part of the oil pan gasket is disposed on the annular bead of the flange part, The main part of the oil pan gasket is compressed in close contact with a block member and an annular bead, and the sealing ring is arranged on the flat part of the flange part.

請求項２の密封構造は、請求項１の密封構造において、前記オイルパンガスケットの本体部はブロック部材と環状ビードに密着して圧縮され、前記密封環は大部分がブロック部材と前記フランジ部の平面部とに圧着することを特徴とする。 The sealing structure according to claim 2 is the sealing structure according to claim 1, wherein the main body portion of the oil pan gasket is compressed in close contact with the block member and the annular bead, and the sealing ring is mostly composed of the block member and the flange portion. It is characterized by being crimped to a flat surface portion.

以上説明したように本発明は、平面部へ環状ビードを設けたフランジ部を有するオイルパンに対して、該環状ビードへは前記オイルパンガスケットの本体部を配置し、前記フランジ部の平面部へは弾性体からなる密封環を配してブロック部材との締付けによって本体部と密封環とを適正な締付け面圧をもって密着させて密封を図ることを特徴としている。   As described above, in the present invention, the oil pan having the flange portion provided with the annular bead on the flat surface portion is arranged with the main body portion of the oil pan gasket disposed on the annular bead. Is characterized in that a sealing ring made of an elastic body is disposed and the main body and the sealing ring are brought into close contact with each other with an appropriate tightening surface pressure by tightening with a block member.

このように、環状ビードとブロック部材とによって圧縮される前記オイルパンガスケットの本体部は高い締付け面圧を受け止めており、一方、弾性体からなる密封環は密封部材と前記フランジ部の平面部とに圧縮されるが、環状ビードが形成された高さ寸法だけの間隙を有しているから一定以上の締付け圧を受けない配置構造となっており、密封環の最適な面圧を得られるよう構成することができ、応力緩和とかヘタリが少なくボルトのトルクダウンや洩れを完璧に防ぎ得るものとなる。 As described above, the main body portion of the oil pan gasket compressed by the annular bead and the block member receives a high tightening surface pressure, while the sealing ring made of an elastic body has a sealing member and a flat portion of the flange portion. However, since the annular bead has a gap of the height dimension formed, it has an arrangement structure that does not receive a certain clamping pressure, so that the optimum surface pressure of the sealing ring can be obtained. It is possible to construct, and there is little stress relaxation or settling, and it is possible to completely prevent bolt torque reduction and leakage.

したがって、請求項１ないし2に示すような密封構造によって製造されたオイルパンガスケットは、前記したように強圧縮部分と弱圧縮部分に対して材料と形状とをそれぞれ選定せしめ、適材をもって適所に最適状況に配置できるものであり、シール性と耐久性のみならずオイルパン等のフランジの座屈変形まで防止しうるものとなる Therefore, the oil pan gasket manufactured by the sealing structure as shown in claim 1 or 2 is selected as the material and the shape for the strong compression part and the weak compression part as described above, and is optimally suited to the right place with the right material. It can be placed in any situation, and can prevent not only sealing and durability but also buckling deformation of flanges such as oil pans.

図1は、この出願の発明の一実施形態を示したものである。
図2は、図1の締め付け前の状態を示すものである。
図3は、この出願の発明の他の実施形態を示したものである。 FIG. 1 shows an embodiment of the invention of this application.
FIG. 2 shows a state before tightening in FIG.
FIG. 3 shows another embodiment of the invention of this application.

図１は、オイルパン1へオイルパンガスケット2が装着された締め付け状態を示しており、ブロック部材3とによって圧縮されている。このオイルパンガスケット2は金属板で本体部２ａを形成し、この本体部２ａの両周縁部に弾性体からなる密封環２ｂを形成せしめいる。このオイルパンガスケット2をオイルパン1へ装着してボルト等の締め付け具を用いてブロック部材3へ取り付けるが、前記オイルパン1のフランジ部１１へは図1及び図2に示すように平面部１１ａと環状ビード１１ｂが設けられており、前記オイルパンガスケット2の本体部２ａは前記オイルパン1の環状ビード１１ｂへ、密封環２ｂは平面部１１ａへ密着するよう配置して締め付ける。
ここで前記オイルパンガスケット2は強圧縮部分と弱圧縮部分とにそれぞれ適応した最適な締め付け面圧を得さしめることができ、トルクダウンのない高い密封性能と耐久性能を発揮する優れた密封構造となったものである。 FIG. 1 shows a tightened state in which an oil pan gasket 2 is attached to an oil pan 1 and is compressed by a block member 3. The oil pan gasket 2 has a main body portion 2a formed of a metal plate, and seal rings 2b made of an elastic body are formed on both peripheral edges of the main body portion 2a. The oil pan gasket 2 is attached to the oil pan 1 and attached to the block member 3 using a fastening tool such as a bolt. The flat portion 11a is connected to the flange portion 11 of the oil pan 1 as shown in FIGS. An annular bead 11b is provided, and the main body 2a of the oil pan gasket 2 is disposed and tightened so as to be in close contact with the annular bead 11b of the oil pan 1 and the sealing ring 2b is closely adhered to the flat portion 11a.
Here, the oil pan gasket 2 can obtain the optimum tightening surface pressure suitable for the strong compression part and the weak compression part respectively, and has an excellent sealing structure that exhibits high sealing performance and durability without torque down It has become.

図3では他の実施形態の締め付け状態が示されており、ここではオイルパンガスケット2の密封環２ｂをオイルパン1の環状ビード１１ｂへ部分的に架かる位置に配備せしめ、ブロック部材3との締め付けによって前記密封環２ｂの一部分が環状ビード１１ｂとブロック部材3の強締め付け部分へ挟まれて締め付けられる。この状態では密封環２ｂの一部へ周状に局部面圧が加わり密封安全性がさらに高まるものとなる。   FIG. 3 shows the tightening state of another embodiment. Here, the sealing ring 2b of the oil pan gasket 2 is arranged at a position partially spanning the annular bead 11b of the oil pan 1, and tightening with the block member 3 is performed. As a result, a part of the sealing ring 2b is clamped between the annular bead 11b and the strong fastening portion of the block member 3. In this state, local surface pressure is applied to a part of the sealing ring 2b in a circumferential manner, and the sealing safety is further increased.

ここで用いる本体部２ａの金属板としては、ＳＰＣＣ（冷間圧延鋼板）、ＳＰＨＣ（熱間圧延軟鋼板）や、アルミニウム板、ステンレス鋼板などの種々のものが使用でき、板厚み０．２〜０．８ｍｍ程度のものが用いられる。
また、密封環２ｂとしては、ＮＢＲ、ＡＣＭ、AEＭ、ＦＫＭ、ＶＭＱなどの合成ゴムや、合成樹脂の弾性に優れるものが使用される。 As the metal plate of the main body 2a used here, various materials such as SPCC (cold rolled steel plate), SPHC (hot rolled mild steel plate), aluminum plate, stainless steel plate, and the like can be used. About 0.8 mm is used.
Further, as the sealing ring 2b, synthetic rubber such as NBR, ACM, AEM, FKM, VMQ or the like, which is excellent in elasticity of synthetic resin is used.

本発明による密封構造の実施形態例を示す断面図Sectional drawing which shows embodiment example of the sealing structure by this invention 図1の締め付け膳の状態を示す部分斜視図Partial perspective view showing the state of the tightening rod of FIG. 本発明による他の実施形態例を示す断面図Sectional drawing which shows other embodiment examples by this invention

符号の説明Explanation of symbols

１ オイルパン
１１ フランジ部
１１ａ 平面部
１１ｂ 環状ビード
２ オイルパンガスケット
２ａ 本体部
２ｂ 密封環
3
ブロック部材

DESCRIPTION OF SYMBOLS 1 Oil pan 11 Flange part 11a Plane part 11b Annular bead 2 Oil pan gasket 2a Main-body part 2b Sealing ring
Three
Block member

Claims (2)

平面部へ環状ビードを設けたフランジ部を有するオイルパンと、前記フランジ部とブロック部材との間に挟着されるオイルパンガスケットからなる密封構造において、前記オイルパンガスケットの本体部を金属板で形成し、前記本体部の両周縁部に弾性体からなる密封環を形成せしめ、前記フランジ部の環状ビードへ前記オイルパンガスケットの本体部を配置すると共に、前記オイルパンガスケットの本体部はブロック部材と環状ビードに密着して圧縮され、前記フランジ部の平面部へ前記密封環を配置せしめたことを特徴とする密封構造。 In a sealing structure comprising an oil pan having a flange portion provided with an annular bead on a flat surface portion and an oil pan gasket sandwiched between the flange portion and the block member, the body portion of the oil pan gasket is made of a metal plate. Forming a sealing ring made of an elastic body on both peripheral edges of the main body, and disposing the main body of the oil pan gasket on the annular bead of the flange, and the main body of the oil pan gasket is a block member The sealing structure is characterized in that the sealing ring is placed in contact with the annular bead and compressed, and the sealing ring is arranged on the flat surface portion of the flange portion. 請求項１における密封構造において、前記オイルパンガスケットの本体部はブロック部材と環状ビードに密着して圧縮され、前記密封環は大部分がブロック部材と前記フランジ部の平面部とに圧着することを特徴とする密封構造。
2. The sealing structure according to claim 1, wherein the main body portion of the oil pan gasket is compressed in close contact with the block member and the annular bead, and most of the sealing ring is crimped to the block member and the flat portion of the flange portion. Characteristic sealing structure.
JP2003322789A 2003-09-16 2003-09-16 Sealing structure Expired - Fee Related JP4326293B2 (en)

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JP4326293B2 true JP4326293B2 (en) 2009-09-02

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CN108700196A (en) * 2016-03-08 2018-10-23 Nok株式会社 Gasket and sealing device

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