JPH075320Y2 - Metal gasket - Google Patents

Metal gasket

Info

Publication number
JPH075320Y2
JPH075320Y2 JP1988085232U JP8523288U JPH075320Y2 JP H075320 Y2 JPH075320 Y2 JP H075320Y2 JP 1988085232 U JP1988085232 U JP 1988085232U JP 8523288 U JP8523288 U JP 8523288U JP H075320 Y2 JPH075320 Y2 JP H075320Y2
Authority
JP
Japan
Prior art keywords
plate
bead
substrate
sub
metal gasket
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 - Lifetime
Application number
JP1988085232U
Other languages
Japanese (ja)
Other versions
JPH026855U (en
Inventor
修二 川村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toyota Motor Corp
Japan Metal Gasket Co Ltd
Original Assignee
Toyota Motor Corp
Japan Metal Gasket Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toyota Motor Corp, Japan Metal Gasket Co Ltd filed Critical Toyota Motor Corp
Priority to JP1988085232U priority Critical patent/JPH075320Y2/en
Publication of JPH026855U publication Critical patent/JPH026855U/ja
Application granted granted Critical
Publication of JPH075320Y2 publication Critical patent/JPH075320Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【考案の詳細な説明】 [考案の目的] (産業上の利用分野) 本考案は内燃機関を構成するシリンダヘッドとシリンダ
ブロックとの接合面に用いて、燃焼ガス,冷却水及び潤
滑油等の漏洩を防止するための金属ガスケットに関す
る。
DETAILED DESCRIPTION OF THE INVENTION [Purpose of Invention] (Industrial field of application) The present invention is used for a joint surface between a cylinder head and a cylinder block constituting an internal combustion engine, and is used for combustion gas, cooling water, lubricating oil, etc. The present invention relates to a metal gasket for preventing leakage.

(従来の技術) 内燃機関を構成するシリンダヘッドとシリンダブロック
との接合面には、シール機能を付与するために金属ガス
ケットが装着されている。第2図は従来例を示す一部切
欠断面図であり、第3図は透視して示した平面要部図で
ある。そして第2図は第3図のX−X′線よりみた図と
して示す。各図において、は金属ガスケット、弾性を
有する基板2から構成され、シリンダブロック側の燃焼
室に対応して燃焼室孔3が設けられている。燃焼室孔3
を囲む位置にはビード4を設け、この部分に弾性復元力
を利用して面圧を高めるようになっている。なお第3図
で示す2点鎖線はビードの頂部である。基板2には金属
板5を設け、この金属板の燃焼室孔端部を基板2を芯に
してU字形に折曲し、これをグロメット5−1としてい
る。この金属ガスケットはシリンダブロックとシリン
ダヘッドの間に挿入され、ボルト孔6に図示しないボル
トを挿入して圧接状態にて使用されるが、その際エンジ
ンの爆発振動が繰り返し荷重としてビードの頂部にかか
る。従ってこの際のビードの変動振幅を抑制する意味で
前記グロメット5−1を設けており、これはストッパー
としての役目を果たす(以降グロメットとして折曲した
部分をストッパーと称す)。
(Prior Art) A metal gasket is attached to a joint surface between a cylinder head and a cylinder block forming an internal combustion engine to provide a sealing function. FIG. 2 is a partially cutaway cross-sectional view showing a conventional example, and FIG. 3 is a plan view of a main part transparently shown. 2 is shown as a view as seen from the line XX 'in FIG. In each drawing, 1 is composed of a metal gasket and a substrate 2 having elasticity, and a combustion chamber hole 3 is provided corresponding to the combustion chamber on the cylinder block side. Combustion chamber hole 3
A bead 4 is provided at a position surrounding the, and the surface pressure is increased by utilizing elastic restoring force at this portion. The chain double-dashed line shown in FIG. 3 is the top of the bead. A metal plate 5 is provided on the substrate 2, and the end of the combustion chamber hole of the metal plate is bent into a U shape with the substrate 2 as the core, and this is referred to as a grommet 5-1. This metal gasket 1 is inserted between the cylinder block and the cylinder head, and bolts (not shown) are inserted into the bolt holes 6 to be used in a pressure contact state. At that time, explosion vibration of the engine causes repeated load on the top of the bead. It takes. Therefore, the grommet 5-1 is provided in the sense that the fluctuation amplitude of the bead at this time is suppressed, and this serves as a stopper (hereinafter, the portion bent as a grommet is referred to as a stopper).

(考案が解決しようとする課題) 上記した通り、ストッパー5−1はいわば折り返し部分
であり、この折り返し位置はビード4の凸分を超えた燃
焼室孔側の平坦部である。しかも近年のエンジンの高性
能化,軽量化,小形化に伴ない、燃焼室孔間隔が狭くな
り、その結果、基板より板厚の薄いストッパー5−1の
折返し幅は3mmより広くすることはできず、板厚が薄い
ことと折返し幅が狭いことで、エンジンの作動停止の繰
返しにより、シリンダーブロックとシリンダーヘッドと
の熱膨脹差及びエンジンの振動等により、ストッパーが
ずれて変形したり、基板から外れてしまうこともあり得
る。そしてこれらの現象発生時にはビードの凸部の内側
(燃焼室孔側)にストッパーが存在しないことになり、
エンジン作動による爆発時に発生する高温,高圧な火焔
にビードの凸部がさらされ、長期的には軟化してばね性
が劣化し、ガスの吹抜けにつらなってしまう。
(Problems to be Solved by the Invention) As described above, the stopper 5-1 is, so to speak, a folded-back portion, and this folded-back position is a flat portion on the combustion chamber hole side that exceeds the convex portion of the bead 4. Moreover, as the engine performance has become higher, lighter, and smaller in recent years, the distance between the holes in the combustion chamber has become narrower, and as a result, the width of the stopper 5-1 that is thinner than the substrate can be made wider than 3 mm. However, due to the thin plate thickness and narrow folding width, the stopper may be distorted or deformed due to the difference in thermal expansion between the cylinder block and the cylinder head, the vibration of the engine, etc. There is a possibility that it will end up. And when these phenomena occur, there will be no stopper inside the convex part of the bead (combustion chamber hole side),
The bead protrusions are exposed to the high temperature and high pressure flames that are generated when the engine operates and explode, softening for a long period of time and deteriorating the spring properties, leading to gas blow-through.

本考案は上記事情に鑑みなさたものであり、エンジンの
振動又は熱膨脹差があっても安定したエンジン作動を継
続することの可能な金属ガスケットを提供することを目
的としている。
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a metal gasket that can continue stable engine operation even if there is vibration or thermal expansion difference in the engine.

[考案の構成] (課題を解決するための手段) 本考案を実施例に対応する第1図を用いて説明すると、
基板2は単板構成とし、燃焼室孔縁部とビード4との間
の平坦部に副板7を固着した。
[Structure of the Invention] (Means for Solving the Problem) The present invention will be described with reference to FIG. 1 corresponding to the embodiment.
The substrate 2 has a single plate structure, and the sub plate 7 is fixed to the flat portion between the edge of the combustion chamber hole and the bead 4.

(作用) 副板7は固着されているため、熱膨脹差によるずれはな
く、しかも構造が簡単になり、グロメットを施こすため
に基板の内径を大きくする必要はなく、副板接合部分を
広く使うことができる。
(Function) Since the sub-plate 7 is fixed, there is no displacement due to the difference in thermal expansion, and the structure is simple, and it is not necessary to increase the inner diameter of the substrate to apply the grommet, and the sub-plate joining portion is widely used. be able to.

(実施例) 以下図面を参照して実施例を説明する。(Examples) Examples will be described below with reference to the drawings.

第1図は本考案による金属ガスケットの一実施例の一部
切欠断面図であり、断面位置は第2図の場合と同様であ
る。第1図において第2図及び第3図と同一部分につい
ては同一符号を付して説明を省略する。
FIG. 1 is a partially cutaway sectional view of an embodiment of the metal gasket according to the present invention, and the sectional position is the same as that of FIG. In FIG. 1, the same parts as those in FIGS. 2 and 3 are designated by the same reference numerals and the description thereof will be omitted.

7は副板で、ビード4の凸部側の内側へ基板の内径端部
と副板7の内径端部を揃えて固着する。既に説明した第
2図にて取付位置を示すと、燃焼室孔3の周縁とビード
4との間に存在する平坦部にリング状の副板7を固着す
る。固着手段は接着又は溶着のいずれでもよく、さらに
固着位置と強度は副板7の全面又は部分接合でもよい。
接着強度はエンジンの締付面圧を受け、さらに運転時に
体膨脹で増加する面圧とシリンダヘッドとシリンダブロ
ックの膨脹差で発生するずれによる剥離を防止できる荷
重があればよいため、溶着の場合は全周シームでなくて
も点溶接の点数を増加することでもよい。勿論副板7は
ストッパーとしての機能を有するものであるため、その
板厚は基板2よりも薄くし、ビード4の高さよりも低い
位置とする。これはビード4の振幅を抑制する働きから
言って当然のことである。
Reference numeral 7 denotes a sub plate, and the inner diameter end portion of the substrate and the inner diameter end portion of the sub plate 7 are aligned and fixed to the inner side of the convex portion side of the bead 4. When the mounting position is shown in FIG. 2 already described, the ring-shaped sub-plate 7 is fixed to the flat portion existing between the peripheral edge of the combustion chamber hole 3 and the bead 4. The fixing means may be either adhesion or welding, and the fixing position and strength may be the entire surface of the sub-plate 7 or partial bonding.
Adhesion strength should be such that there is a load that can prevent peeling due to the surface pressure that increases due to body expansion during operation and the shift that occurs due to the expansion difference between the cylinder head and cylinder block during welding. It is also possible to increase the number of spot welds even if the seam is not the entire circumference. Of course, since the sub plate 7 has a function as a stopper, the sub plate 7 is made thinner than the substrate 2 and is located at a position lower than the height of the bead 4. This is natural from the standpoint of suppressing the amplitude of the bead 4.

従って、エンジンのシリンダブロックとシリンダヘッド
との間に介在させ、ボルトによって締付けてエンジンを
動作した場合、エンジンの爆発振動がビード4に対いて
繰返し荷重としてかかっても、燃焼室周縁とビードとの
間に副板7が固着されているため、これがストッパーの
作用をするばかりか、熱膨脹差によるずれの発生もな
い。更に燃焼室周縁とビードとの間の平坦部に設けてい
るための火焔の進入もない。
Therefore, when the engine is operated by interposing it between the cylinder block and the cylinder head of the engine and tightening with bolts, even if the explosion vibration of the engine is applied to the bead 4 as a repeated load, the peripheral edge of the combustion chamber and the bead are Since the sub-plate 7 is fixed between them, not only does it act as a stopper, but there is no deviation due to the difference in thermal expansion. Further, since it is provided in the flat portion between the peripheral edge of the combustion chamber and the bead, no flame enters.

[考案の効果] 以上説明したように、本考案によれば燃焼室周縁とビー
ドの凸部との間の平坦部に副板を固着する構成としたの
で、以下に列挙する効果を奏する。
[Advantages of the Invention] As described above, according to the present invention, since the auxiliary plate is fixed to the flat portion between the peripheral edge of the combustion chamber and the convex portion of the bead, the following effects are achieved.

構造が単純 熱膨脹差による、ずれの発生なし 材料費が極めて安く、従って製作コスト安価 グロメットを施こすための基板の内径を大きくする
必要がなく、狭い気筒間を広く使うことができる。
Structure does not occur due to the difference in thermal expansion. Material cost is extremely low. Therefore, manufacturing cost is low. It is not necessary to increase the inner diameter of the substrate for applying the grommet, and it is possible to widely use between narrow cylinders.

【図面の簡単な説明】[Brief description of drawings]

第1図は本考案による金属ガスケットの一実施例の構成
図、第2図は従来の金属ガスケットを説明する図、第3
図は金属ガスケットを一部切欠して示した透視平面図で
ある。 …金属ガスケット、2…基板 3…燃焼室孔、4…ビード 5…金属板、5−1…グロメット 6…ボルト孔、7…副板
FIG. 1 is a configuration diagram of an embodiment of a metal gasket according to the present invention, FIG. 2 is a diagram illustrating a conventional metal gasket, and FIG.
The figure is a perspective plan view showing a metal gasket partially cut away. DESCRIPTION OF SYMBOLS 1 ... Metal gasket, 2 ... Substrate 3 ... Combustion chamber hole, 4 ... Bead 5 ... Metal plate, 5-1 ... Grommet 6 ... Bolt hole, 7 ... Sub-plate

Claims (2)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項1】燃焼室孔の周縁にビードを形成した弾性金
属板からなる基板を有する金属ガスケットにおいて、前
記基板は単板構成とするとともに、燃焼室孔縁部とビー
ドとの間の平坦部上の周縁に沿って基板の板厚よりも薄
い副板を固着し、前記ビードの高さは前記基板の板厚と
副板の板厚の和より高くし、かつ基板の内径端部と副板
の内径端部とを揃えて固着したことを特徴とする金属ガ
スケット。
1. A metal gasket having a substrate made of an elastic metal plate having a bead formed on the periphery of a combustion chamber hole, wherein the substrate has a single plate structure, and a flat portion between the edge of the combustion chamber hole and the bead. A sub-plate, which is thinner than the plate thickness of the substrate, is fixed along the upper edge, the height of the bead is higher than the sum of the plate thickness of the substrate and the plate thickness of the sub-plate, and the inner diameter end of the substrate and the sub-plate are A metal gasket characterized in that the inner diameter end of the plate is aligned and fixed.
【請求項2】副板は、その前面または一部分を接着ある
いは溶着によって固着したことを特徴とする請求項1記
載の金属ガスケット。
2. The metal gasket according to claim 1, wherein a front surface or a part of the sub-plate is fixed by adhesion or welding.
JP1988085232U 1988-06-28 1988-06-28 Metal gasket Expired - Lifetime JPH075320Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988085232U JPH075320Y2 (en) 1988-06-28 1988-06-28 Metal gasket

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988085232U JPH075320Y2 (en) 1988-06-28 1988-06-28 Metal gasket

Publications (2)

Publication Number Publication Date
JPH026855U JPH026855U (en) 1990-01-17
JPH075320Y2 true JPH075320Y2 (en) 1995-02-08

Family

ID=31309905

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988085232U Expired - Lifetime JPH075320Y2 (en) 1988-06-28 1988-06-28 Metal gasket

Country Status (1)

Country Link
JP (1) JPH075320Y2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51130623U (en) * 1975-04-14 1976-10-21
JPS575413Y2 (en) * 1978-09-13 1982-02-01
JPS5577651U (en) * 1978-11-25 1980-05-28
JP4287069B2 (en) 2001-03-23 2009-07-01 ニチアス株式会社 Metal gasket

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6114748U (en) * 1984-07-03 1986-01-28 日本メタルガスケツト株式会社 metal gasket
JPS62155375A (en) * 1985-12-27 1987-07-10 Nippon Metal Gasket Kk Metallic gasket
JPH0625598B2 (en) * 1986-05-26 1994-04-06 石川ガスケット株式会社 Metal laminated gasket with surface pressure adjustment piece
JPH024283Y2 (en) * 1986-11-01 1990-01-31

Also Published As

Publication number Publication date
JPH026855U (en) 1990-01-17

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