JPH0313556Y2 - - Google Patents
Info
- Publication number
- JPH0313556Y2 JPH0313556Y2 JP1988031753U JP3175388U JPH0313556Y2 JP H0313556 Y2 JPH0313556 Y2 JP H0313556Y2 JP 1988031753 U JP1988031753 U JP 1988031753U JP 3175388 U JP3175388 U JP 3175388U JP H0313556 Y2 JPH0313556 Y2 JP H0313556Y2
- Authority
- JP
- Japan
- Prior art keywords
- bead
- plate
- laminated
- periphery
- hole
- 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
- 239000011324 bead Substances 0.000 claims description 43
- 239000002184 metal Substances 0.000 claims description 24
- 230000000694 effects Effects 0.000 description 5
- 238000007789 sealing Methods 0.000 description 5
- 239000000498 cooling water Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 2
- 229920001973 fluoroelastomer Polymers 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
Landscapes
- Gasket Seals (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
本考案は、内燃機関のシリンダーブロツクとシ
リンダーヘツドとの接合部等をシールする金属ガ
スケツト、さらに詳しくは、特に燃焼室のガスシ
ール性の耐久的な維持と、ビード亀裂に対する改
善を意図する積層型金属ガスケツトに関するもの
である。[Detailed description of the invention] (Field of industrial application) The present invention is a metal gasket that seals the joint between the cylinder block and cylinder head of an internal combustion engine, and more specifically, the gas The present invention relates to a laminated metal gasket intended for maintenance and improvement against bead cracking.
（従来の技術）
従来の金属ガスケツトには、一般的に硬度が
Hv430〜500薄板金属バネ材に、ビードの断面形
状をボルト締結部位より離間するに従いバネ定数
が大となるように形成するとともに、両面にフツ
素ゴムなどの耐熱性表面処理機能材を塗布し、ビ
ード部分の弾性と、表裏に塗布したフツ素ゴムな
どの耐熱性表面処理機能材の密着性の作用で高
温、高圧の燃焼ガスシール機能を維持させたもの
（実開昭59−188351号）や、穴の周縁部に形成さ
れたビードの周囲に、ボア部グロメツトと非シー
ル部の段差に相当する高さの弧状ビードを形成し
た積層型金属ガスケツト（実開昭59−103850号）
が公知になつている。(Conventional technology) Conventional metal gaskets generally have a hardness.
Hv430~500 thin metal spring material is formed with a cross-sectional shape of the bead so that the spring constant increases as the distance from the bolt fastening area increases, and a heat-resistant surface treatment functional material such as fluoro rubber is applied to both sides. The elasticity of the bead part and the adhesion of the heat-resistant surface treatment functional material such as fluorocarbon rubber coated on the front and back sides maintain the combustion gas sealing function at high temperatures and high pressures (Utility Model Publication No. 188351/1983). , a laminated metal gasket in which an arcuate bead with a height corresponding to the step between the bore grommet and the non-sealed part is formed around the bead formed at the periphery of the hole (Utility Model Application No. 103850/1983).
has become publicly known.
（考案が解決しようとする問題点）
ところが近年の高性能エンジンでは、ターボ仕
様、DOHC化、爆発圧の増加、エンジンの小型
軽量化などで、ガスケツトがさらされる環境はま
すます厳しくなつてきている。(Problem that the invention aims to solve) However, in recent years, the environment that gaskets are exposed to in high-performance engines has become increasingly harsh due to turbo specifications, DOHC, increased explosion pressure, and smaller and lighter engines. .
このため前者の金属ガスケツトの場合、バネ定
数に変化のあるビードの形成が困難であるととも
に、シールすべきループが、波形状のビードが圧
縮された上下頂点に形成され、運転初期には十分
シールされているが、エンジンの運転中のにおけ
るシリンダー内の圧力変化の繰返しが長期に亘る
と、ビード加工時の残留応力の影響と、繰返し応
力の作用による疲労と塑性変形によつてビード部
分に亀裂等を生じ、シール効果が喪失される欠点
があり、また後者の積層型金属ガスケツトにおい
ては、弧状ビードが上下方向に力を加えた時にタ
ワミ易く、剛性を低くするものでなければならな
いから、環状ビードの圧縮に対するストツパーの
機能を期待できないものであり、環状ビードが早
期にヘタリ、長期にわたつて優れたシール効果を
期待することができない点に問題があつた。 For this reason, in the case of the former metal gasket, it is difficult to form a bead with a varying spring constant, and the loops to be sealed are formed at the top and bottom vertices of the compressed wave-shaped bead. However, if pressure changes in the cylinder are repeated over a long period of time during engine operation, cracks may occur in the bead due to the effects of residual stress during bead processing and fatigue and plastic deformation caused by the repeated stress. In addition, in the latter laminated metal gasket, the arcuate bead tends to sag when force is applied in the vertical direction, and the rigidity must be low. There was a problem in that the function of a stopper against compression of the bead could not be expected, and the annular bead would wear out early, making it impossible to expect an excellent sealing effect over a long period of time.
本考案は、前記のような問題点を解決するため
に、最近の高性能エンジンに対応できるよう、ガ
ス漏れ、ビード部の亀裂を防止して、耐久性、信
頼性、製作性に優れた金属ガスケツトを提供せん
とするものである。 In order to solve the above-mentioned problems, this invention has been developed to prevent gas leakage and cracks in the bead, and to be compatible with recent high-performance engines. The purpose is to provide gaskets.
（問題点を解決するための手段）
本考案の積層型金属ガスケツトは、弾性金属薄
板にシリンダーボアー等の穴を閉設するととも
に、該穴の周縁及び弾性金属薄板の周縁に断面視
波形状のビードを形成したビード板を、金属製調
整板の両面に積層した積層型金属ガスケツトにお
いて、前記ビード板のビードの膨出高さよりも低
い高さのデインプルの多数を、ビードの周囲に沿
う全周に形成したことを特徴とする。(Means for solving the problem) The laminated metal gasket of the present invention has a hole such as a cylinder bore closed in an elastic thin metal plate, and a cross-sectional visible wave shape on the periphery of the hole and the periphery of the elastic thin metal plate. In a laminated metal gasket in which a bead plate with beads formed thereon is laminated on both sides of a metal adjustment plate, a large number of dimples having a height lower than the bulging height of the bead of the bead plate are arranged around the entire circumference of the bead. It is characterized by being formed.
（実施例）
第１図は本考案を実施した金属ガスケツトの一
部平面図、第２図は第１図のＡ−Ａ線における拡
大端面図である。(Example) FIG. 1 is a partial plan view of a metal gasket embodying the present invention, and FIG. 2 is an enlarged end view taken along line A--A in FIG. 1.
ビード基板Ｇは、厚み0.25mm、硬度Hv450のス
テンレス鋼鈑製のビード板２に、並列するシリン
ダーボアー３、複数組のボルト穴４、冷却水通路
穴５、冷却水通路穴６等の穴をそれぞれ開設する
とともに、これらの各穴と弾性金属薄板２の周縁
に、断面視波形状であつて、ビード幅2.5mm、ビ
ード高さ0.25mm、初期面圧800Kg／cm2のビード７
を形成し、かつ、耐久的にシール機能を保証する
高さで、実際にはエンジンの挙動に依つて設計的
に決められるものであるが、10〜200ミクロンの
範囲にある断面半球形のデインプル８の多数を、
ビード７の周囲の全周に形成し、両面には約15ミ
クロン程度のフツ素ゴムからなる合成樹脂皮膜１
を施した構成となつている。尚、シリンダーボア
ー３の周囲のデインプル８は図面上円形で図示
し、他のデインプル８は点線で図示している。 The bead board G has holes such as cylinder bores 3 arranged in parallel, multiple sets of bolt holes 4, cooling water passage holes 5, cooling water passage holes 6, etc. on a bead plate 2 made of stainless steel plate with a thickness of 0.25 mm and a hardness of Hv450. At the same time, a bead 7 is formed in each of these holes and at the periphery of the elastic thin metal plate 2 with a wave-shaped cross section, a bead width of 2.5 mm, a bead height of 0.25 mm, and an initial surface pressure of 800 Kg/cm 2 .
A dimple with a hemispherical cross-section in the range of 10 to 200 microns, which is actually determined by design depending on the behavior of the engine. a majority of 8,
A synthetic resin film 1 made of fluoro rubber with a thickness of approximately 15 microns is formed on both sides of the bead 7.
It is configured with Note that the dimples 8 around the cylinder bore 3 are shown as circles in the drawing, and the other dimples 8 are shown as dotted lines.
上記のように形成されたビード基盤Ｇを第３図
に示すように、硬度Hv150で厚さ0.9mmの亜鉛鍍
金鋼鈑を使用した調整板９の両面に、金属ガスケ
ツトＧを、デインプル８の凹部が外面となるよう
に積層した構成とする。 As shown in FIG. 3, the bead base G formed as described above is placed on both sides of an adjusting plate 9 made of galvanized steel sheet with a hardness of Hv150 and a thickness of 0.9 mm, and a metal gasket G is placed in the concave part of the dimple 8. The structure is such that they are stacked so that the outer surface is the outer surface.
デインプル８の形状については、断面半球形以
外に各種のものが考えられるが、第４図に示すよ
うに、断面を波形にしたものＡ、逆円錐形のもの
Ｂ、逆円錐台形のものＣが代表的なものであり、
円筒形、角錐形、角錐台形等も同様の作用効果を
奏する。 As for the shape of the dimple 8, there are various shapes other than a hemispherical cross section. It is representative,
A cylindrical shape, a pyramid shape, a truncated pyramid shape, etc. also have similar effects.
（考案の作用効果）
本考案の積層型金属ガスケツトによれば、ビー
ド板に開設されたシリンダーボアー等の穴の周縁
及び弾性金属薄板の周縁に断面視波形状のビード
を形成し、かつ前記ビードの膨出高さよりも低い
高さのデインプルの多数をビードの周囲に沿う全
周に形成したビード基板を、金属製調整板の両面
に積層したから、デインプルの作用により前記ビ
ードの弾性による優れたシール効果の長期維持を
達成することができる。(Operation and Effect of the Invention) According to the laminated metal gasket of the present invention, a bead with a visible wave shape in cross section is formed on the periphery of a hole such as a cylinder bore formed in a bead plate and on the periphery of an elastic thin metal plate, and the bead has a visible wave shape in cross section. A bead substrate, in which a large number of dimples with a height lower than the bulge height of Long-term maintenance of the sealing effect can be achieved.
即ち、デインプルに付加される集中荷重は、デ
インプル周壁で等分布的に分散支持されるように
なるから、ビードに比べ挫屈的強度に優れ、この
ため、ビードの膨出高さよりも低い高さのデイン
プルの多数を、ビードの周囲に沿う全周に形成し
た場合、これらのデインプルが、シール作用をす
るビードの弾性的振幅を小さくして塑性変形所謂
へたりを食止めるストツパーの役目を果たし、過
度の応力によつてもビードがつぶれることなく、
ビードの弾性をより有効に持続させることを可能
にし、燃焼ガスのシール性の維持、ビード部の亀
裂の防止を効果的に達成するとともに、経時的へ
たりを考慮することなく初期の面圧を低くおさえ
ることが出来るので、耐久的なシール性が保証さ
れ、金属ガスケツトの締付面圧も軽減されてシリ
ンダーヘツドおよびシリンダーボアーの歪みを少
くできる。 In other words, the concentrated load applied to the dimple is evenly distributed and supported by the surrounding wall of the dimple, which has superior buckling strength compared to the bead. When a large number of dimples are formed along the entire circumference of the bead, these dimples act as a stopper to reduce the elastic amplitude of the bead that acts as a seal and prevent plastic deformation, so-called fatigue. The bead will not collapse even under excessive stress.
It makes it possible to sustain the elasticity of the bead more effectively, effectively maintaining the sealing performance of combustion gas and preventing cracks in the bead part, and also reduces the initial surface pressure without considering wear over time. Since the pressure can be kept low, durable sealing performance is guaranteed, and the tightening surface pressure of the metal gasket is also reduced, reducing distortion of the cylinder head and cylinder bore.
第１図は本考案の実施例に係る金属ガスケツト
の平面図、第２図は第１図のＡ−Ａ線におけるビ
ード基板Ｇのみの一部省略の拡大端面図、第３図
は第１図のＡ−Ａ線における一部省略の拡大端面
図、第４図はデインプルの実施例を示す説明図で
ある。
１……合成樹脂皮膜、２……ビード板、３……
シリンダーボアー、４……ボルト穴、５……冷却
水通路穴、６……冷却水通路穴、７……ビード、
８……デインプル、９……調整板、Ｇ……ビード
基板。
1 is a plan view of a metal gasket according to an embodiment of the present invention, FIG. 2 is an enlarged end view taken along line A-A in FIG. 1 with only the bead substrate G partially omitted, and FIG. FIG. 4 is an enlarged end view taken along the line A-A of FIG. 1...Synthetic resin film, 2...Bead plate, 3...
Cylinder bore, 4...Bolt hole, 5...Cooling water passage hole, 6...Cooling water passage hole, 7...Bead,
8...Dimple, 9...Adjustment plate, G...Bead board.
Claims (1)
するとともに、該穴の周縁及び弾性金属薄板の周
縁に断面視波形状のビードを形成したビード板
を、金属製調整板の両面に積層した積層型金属ガ
スケツトにおいて、前記ビード板のビードの膨出
高さよりも低い高さのデインプルの多数を、ビー
ドの周囲に沿う全周に形成したことを特徴とする
積層型金属ガスケツト。 A laminated metal plate in which a hole such as a cylinder bore is formed in an elastic thin metal plate, and a bead plate with a visible cross-sectional wave shape is formed on the periphery of the hole and the periphery of the elastic thin metal plate, and is laminated on both sides of a metal adjustment plate. 1. A laminated metal gasket characterized in that a large number of dimples having a height lower than the protruding height of the bead of the bead plate are formed along the entire circumference of the bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988031753U JPH0313556Y2 (en) | 1988-03-09 | 1988-03-09 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988031753U JPH0313556Y2 (en) | 1988-03-09 | 1988-03-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01134760U JPH01134760U (en) | 1989-09-14 |
| JPH0313556Y2 true JPH0313556Y2 (en) | 1991-03-27 |
Family
ID=31257845
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988031753U Expired JPH0313556Y2 (en) | 1988-03-09 | 1988-03-09 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0313556Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0486150B2 (en) * | 1990-11-13 | 2000-06-28 | Ishikawa Gasket Co. Ltd. | Steel laminate gasket with seal protecting member |
| US7121556B2 (en) * | 2004-04-07 | 2006-10-17 | Freudenberg-Nok General Partnership | Molded plastic gasket |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055704A (en) * | 1983-09-06 | 1985-04-01 | Mitsubishi Electric Corp | Portable radio antenna |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59103850U (en) * | 1982-12-28 | 1984-07-12 | いすゞ自動車株式会社 | Gasket for cylinder head |
| JPS59188351U (en) * | 1983-06-02 | 1984-12-13 | 日本メタルガスケツト株式会社 | gasket |
-
1988
- 1988-03-09 JP JP1988031753U patent/JPH0313556Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6055704A (en) * | 1983-09-06 | 1985-04-01 | Mitsubishi Electric Corp | Portable radio antenna |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01134760U (en) | 1989-09-14 |
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