JPH0414676Y2 - - Google Patents
Info
- Publication number
- JPH0414676Y2 JPH0414676Y2 JP1988170097U JP17009788U JPH0414676Y2 JP H0414676 Y2 JPH0414676 Y2 JP H0414676Y2 JP 1988170097 U JP1988170097 U JP 1988170097U JP 17009788 U JP17009788 U JP 17009788U JP H0414676 Y2 JPH0414676 Y2 JP H0414676Y2
- Authority
- JP
- Japan
- Prior art keywords
- bead
- cylinder bore
- grommet
- shim
- 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
Links
- 239000011324 bead Substances 0.000 claims description 45
- 239000000758 substrate Substances 0.000 claims description 19
- 229910052751 metal Inorganic materials 0.000 claims description 16
- 239000002184 metal Substances 0.000 claims description 16
- 238000004381 surface treatment Methods 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 2
- 238000007789 sealing Methods 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 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、特に多気筒内燃機関のシ
リンダーヘツドとシリンダーブロツクの接合面を
シールするために使用する金属ガスケツトに関
し、更に詳しくは、ビードに対する面圧調整作用
と高温ガス遮蔽作用とを発揮するグロメツトシム
を備えた金属ガスケツトに関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a metal gasket used for sealing the joint surface between a cylinder head and a cylinder block of an internal combustion engine, particularly a multi-cylinder internal combustion engine. The present invention relates to a metal gasket equipped with a grommet shim that exerts a surface pressure adjustment function on a bead and a high-temperature gas shielding function.
（従来の技術）
最近の内燃機関は高出力化、高温化とともに軽
量化される傾向にあつて、従来の鋳物に代替して
シリンダーヘツド、シリンダーブロツクともにア
ルミニユウム製にするか、またはシリンダーヘツ
ドのみをアルミニユウム製になされているが、こ
のような剛性の低い材料を使用することから、稼
働に際し、シリンダーヘツドとシリンダーブロツ
クの剛性が低下されやすく、かつシリンダーヘツ
ドとシリンダーブロツクの相対的変位が大きくな
る傾向にある。(Prior art) Modern internal combustion engines tend to be lighter in weight as well as higher output and higher temperatures.Instead of conventional castings, both the cylinder head and cylinder block are made of aluminum, or only the cylinder head is made of aluminum. It is made of aluminum, but due to the use of such a low-rigidity material, the rigidity of the cylinder head and cylinder block tends to decrease during operation, and the relative displacement between the cylinder head and cylinder block tends to increase. It is in.
このため、爆発時のガス圧、発熱および振動の
繰り返しの変動に充分に対応できて、シール性能
を長期にわたり維持できるようなガスケツトが要
求され、特開昭61−255251号公報において、シリ
ンダーボアー用開口部を囲繞する外向のビードを
形成した二枚のビード基板の間に調整板を介装
し、該調整板のシリンダーボアー開口部径を前記
ビード基板のそれより小として、これにより延設
状態となつた周縁部に、押圧締結時のビード部位
の厚さよりも大なる厚さを有するグロメツトを装
着した構成の積層金属ガスケツトが発明された公
知となつている。 For this reason, there is a need for a gasket that can sufficiently respond to repeated fluctuations in gas pressure, heat generation, and vibration during an explosion, and that can maintain sealing performance over a long period of time. An adjustment plate is interposed between two bead substrates having outwardly directed beads surrounding the opening, and the diameter of the cylinder bore opening of the adjustment plate is made smaller than that of the bead substrate, thereby creating an extended state. A laminated metal gasket has been invented and is known in which a grommet having a thickness greater than the thickness of the bead portion at the time of pressure fastening is attached to the circumferential edge thereof.
（考案が解決しようとする課題）
ところが上記公知の金属ガスケツトの構成によ
れば、グロメツトの板厚とビード基板の板厚の差
分の僅かしかシム効果を期待することができない
ものであるから、シリンダーボアー用開口部周縁
のビードに発生する高い応力、高い負荷応力振幅
への根本的な対策にはなりえず、なおビードに亀
裂やヘタリが発生してシール性能を維持でない欠
点があり、また、シムの装着においては、ビード
基板の熱膨張及び変形を考慮して、ビード基板端
面とシムの端面との間に間隙を形成する必要があ
つて、シリンダーボアー開口部間が広い場合は適
用できても、シリンダーボアー開口部間の狭いシ
リンダーにおいては、十分なシール効果と耐久性
を期待できず、適用しがたい点に解決すべき課題
があつた。(Problem to be solved by the invention) However, according to the structure of the above-mentioned known metal gasket, the shim effect can only be expected by a small difference between the thickness of the grommet and the thickness of the bead substrate. It cannot be a fundamental countermeasure against the high stress and high load stress amplitude that occur in the bead around the bore opening, and it also has the disadvantage that the bead may crack or sag, making it impossible to maintain sealing performance. When installing the shim, it is necessary to form a gap between the end face of the bead board and the end face of the shim in consideration of thermal expansion and deformation of the bead board, and this method cannot be applied when the gap between the cylinder bore openings is wide. However, in a cylinder with a narrow space between cylinder bore openings, sufficient sealing effect and durability could not be expected, and there was a problem to be solved in that it was difficult to apply.
（課題を解決するための手段）
本考案に係る金属ガスケツトの構成は下記のと
おりである。(Means for Solving the Problems) The structure of the metal gasket according to the present invention is as follows.
即ち、並列するシリンダーボアー用開口部Ａそ
の他の開口部周縁および外周縁に沿い内向きのビ
ード４，４を輪郭状に形成し、両面に表面処理
５，５を施した二枚のビード基板３，３を、調整
板２の両側に配設するとともに、調整板２のシリ
ンダーボアー用開口部Ａにグロメツトシム６を装
着した金属ガスケツトにおいて、調整板２のシリ
ンダーボアー用開口部Ａ部分のグロメツトシム６
を、押圧締結時にビード基板３，３のシリンダー
ボアー用開口部Ａの縁部で挟着されるように装着
したことを特徴とする金属ガスケツトを要旨とす
るものである。 That is, two beaded substrates 3 having inwardly facing beads 4, 4 formed in a contour shape along the periphery and outer periphery of the parallel cylinder bore opening A and other openings, and having surface treatments 5, 5 applied to both surfaces. , 3 are arranged on both sides of the adjustment plate 2, and a grommet shim 6 is attached to the cylinder bore opening A of the adjustment plate 2.
This metal gasket is characterized in that it is mounted so as to be sandwiched between the edges of the cylinder bore openings A of the bead substrates 3, 3 when the gaskets are press-fastened.
（実施例）
本考案に係る金属ガスケツトの構成を、実施例
に基づき説明する。(Example) The structure of a metal gasket according to the present invention will be explained based on an example.
第１図は本考案の実施例を示す金属ガスケツト
１の平面図であつて、幅中央部にシリンダーボア
ー用開口部Ａが並設され、その周辺および外周縁
Ｂに沿い、冷却水、オイル、その他のボルト用の
開口部が多数穿設される。 FIG. 1 is a plan view of a metal gasket 1 showing an embodiment of the present invention, in which cylinder bore openings A are arranged in parallel at the center of the width, and cooling water, oil, A number of openings for other bolts are drilled.
ビード基板３の開口部Ａその他の開口部の周
縁、および外周縁Ｂに沿い、第１図に一点鎖線で
示す箇所にいずれもビード４を輪郭状に形成す
る。 Beads 4 are formed in contours along the periphery of the opening A and other openings of the bead substrate 3, and along the outer periphery B at locations indicated by dashed lines in FIG.
金属ガスケツト１の断面構造は、第２図に示す
とおり、調整板２の両側にビード基板３，３を配
設し、シリンダーボアー用開口部Ａ周縁に沿い二
山のビード４を、その他の開口部周縁および外周
縁Ｂには一山のビード４を、いずれもビード４を
内向きに膨出させて輪郭状に、かつ調整板２に対
称に配置して形成する。 As shown in FIG. 2, the cross-sectional structure of the metal gasket 1 includes bead substrates 3, 3 arranged on both sides of the adjustment plate 2, two bead 4 along the periphery of the cylinder bore opening A, and a bead 4 arranged along the periphery of the cylinder bore opening A, A single bead 4 is formed on the outer circumferential edge and the outer circumferential edge B so that the bead 4 bulges inward to form a contour and is arranged symmetrically with respect to the adjustment plate 2.
ビード基板３，３にはいずれも、その両面に表
面処理５，５によりシール性被膜を形成する。 A sealing film is formed on both surfaces of the bead substrates 3, 3 by surface treatment 5, 5.
更に調整板２のシリンダーボアー用開口部Ａに
は、第２図に示すように、調整板２のシリンダー
ボアー用開口部Ａ部分のグロメツトシム６を、押
圧締結時にビード基板３，３のシリンダーボアー
用開口部Ａの縁部で挟着されるように装着し、そ
れぞれビード４，４に向けて延びるフランジ部
７，７を形成する。 Furthermore, as shown in FIG. 2, a grommet shim 6 at the cylinder bore opening A of the adjustment plate 2 is inserted into the cylinder bore opening A of the bead base plate 3 when the cylinder bore opening A of the adjustment plate 2 is pressed. It is mounted so as to be sandwiched between the edges of the opening A, and flanges 7, 7 extending toward the beads 4, 4 are formed, respectively.
調整板２のシリンダーボアー用開口部Ａに挟着
されるグロメツトシム６には、ステンレス鋼
SUS304を使用し、硬さHVが180〜200範囲のも
のであつて、通常使用されるビード基板の
HV350〜450よりも低い硬さであり、調整板２へ
の取付け加工が容易である。 The grommet shim 6 sandwiched in the cylinder bore opening A of the adjustment plate 2 is made of stainless steel.
SUS304 is used, and the hardness HV is in the range of 180 to 200.
It has a lower hardness than HV350 to HV450, and can be easily attached to the adjustment plate 2.
具体例を示せば、ビード基板３，３の板厚を
0.3mm、ビード４の高さを0.2mmとし、グロメツト
シム６の厚さを0.1mmと、フランジ部７，７の幅
を1.0mmする場合、フランジ部７とビード基板３
との間隔0.1mmが、対応するビード４の変形可能
な空間である。 To give a specific example, the thickness of the bead substrates 3, 3 is
0.3 mm, the height of the bead 4 is 0.2 mm, the thickness of the grommet shim 6 is 0.1 mm, and the width of the flange parts 7, 7 is 1.0 mm.
0.1 mm is the space in which the corresponding bead 4 can be deformed.
この場合、ビード基板３の板厚、そのビード４
の高さ、形状、グロメツトシム６のフランジ部
７，７の板厚は、使用条件により適宜選択すれば
よい。 In this case, the thickness of the bead substrate 3, the bead 4
The height and shape of the grommet shim 6 and the plate thickness of the flange portions 7, 7 of the grommet shim 6 may be appropriately selected depending on the usage conditions.
（考案の作用効果）
本考案に係る金属ガスケツトは、並列するシリ
ンダーボアー用開口部Ａその他の開口部周縁およ
び外周縁に沿い内向きのビード４，４を輪郭状に
形成し、両面に表面処理５，５を施した二枚のビ
ード基板３，３を、調整板２の両側に配設すると
ともに、調整板２のシリンダーボアー用開口部Ａ
にグロメツトシム６を装着した金属ガスケツトに
おいて、調整板２のシリンダーボアー用開口部Ａ
部分のグロメツトシム６を、押圧締結時にビード
基板３，３のシリンダーボアー用開口部Ａの縁部
で挟着されるように装着したから、両側のビード
基板に加わる圧縮荷重によるビードの過度の変形
が、それぞれグロメツトシムのフランジ部表面に
より抑制できて、ビードの最大負荷応力を下げ、
負荷応力幅を小さくして、面圧調整作用を発揮し
うるばかりでなく、同時に、ビードの内側に位置
するグロメツトシムの遮蔽作用により、高温ガス
が直接ビードに接触することを効果的に回避する
ことができ、きわめて簡単な構造であるにもかか
わらず、シール性と耐久性とに優れた金属ガスケ
ツトとすることができる。(Operation and effect of the invention) The metal gasket according to the invention has inwardly directed beads 4, 4 formed in a contour along the periphery and outer periphery of the parallel cylinder bore openings A and other openings, and is surface-treated on both sides. The two bead substrates 3, 3 provided with 5, 5 are arranged on both sides of the adjustment plate 2, and the cylinder bore opening A of the adjustment plate 2 is
In the metal gasket with the grommet shim 6 attached, the cylinder bore opening A of the adjustment plate 2
Since the grommet shims 6 are mounted so that they are sandwiched between the edges of the cylinder bore openings A of the bead substrates 3 during press-fastening, excessive deformation of the bead due to the compressive load applied to the bead substrates on both sides is prevented. , can be suppressed by the flange surface of the grommet shim, lowering the maximum load stress of the bead,
Not only can the load stress width be reduced to exert a surface pressure adjustment effect, but at the same time, the shielding effect of the grommet shim located inside the bead effectively prevents high-temperature gas from coming into direct contact with the bead. Although it has an extremely simple structure, a metal gasket with excellent sealing performance and durability can be obtained.
またグロメツトの板厚がシム効果として作用す
る構成であるから、シリンダーボアー用開口部周
縁のビードに発生する高い応力、高い負荷応力振
幅に対し十分な耐久性が得られ、ビードに亀裂や
ヘタリを発生させずに優れたシール性能を維持す
ることができる。 In addition, since the thickness of the grommet is configured to act as a shim effect, it has sufficient durability against the high stress and high load stress amplitude generated in the bead around the cylinder bore opening, and prevents cracks and deformation in the bead. It is possible to maintain excellent sealing performance without causing this.
さらに調整板２のシリンダーボアー用開口部Ａ
部分のグロメツトシム６を、押圧締結時にビード
基板３，３のシリンダーボアー用開口部Ａの縁部
で挟着されるように装着したから、シムの装着に
おいては、ビード基板の熱膨張及び変形を考慮す
る必要がなく、従つて従来のようにビード基板端
面とシムの端面との間に間隙を成形する必要がな
いから、シリンダーボアー開口部間が広い場合、
狭い場合のいずれに適用しても、十分なシール効
果と耐久性を発揮することができる。 Furthermore, the cylinder bore opening A of the adjustment plate 2
Since the grommet shims 6 were installed so that they were sandwiched between the edges of the cylinder bore openings A of the bead substrates 3, 3 during press-fastening, thermal expansion and deformation of the bead substrates were taken into consideration when installing the shims. Therefore, there is no need to form a gap between the end face of the bead substrate and the end face of the shim as in the conventional case, so when the gap between the cylinder bore openings is wide,
No matter where it is applied, it can exhibit sufficient sealing effect and durability.
第１図は本考案に係る金属ガスケツトの平面
図、第２図は第１図のＸ−Ｘ線における拡大端面
図である。
１……金属ガスケツト、２……調整板、３……
ビード基板、４……ビード、５……表面処理、６
……グロメツトシム、７……フランジ部、Ａ……
シリンダーボアー用開口部、Ｂ……外周縁。
FIG. 1 is a plan view of a metal gasket according to the present invention, and FIG. 2 is an enlarged end view taken along the line X--X in FIG. 1...Metal gasket, 2...Adjustment plate, 3...
Bead substrate, 4...Bead, 5...Surface treatment, 6
... Grommet shim, 7... Flange part, A...
Cylinder bore opening, B...Outer periphery.
Claims (1)
開口部周縁および外周縁に沿い内向きのビード
４，４を輪郭状に形成し、両面に表面処理５，５
を施した二枚のビード基板３，３を、調整板２の
両側に配設するとともに、調整板２のシリンダー
ボアー用開口部Ａにグロメツトシム６を装着した
金属ガスケツトにおいて、調整板２のシリンダー
ボアー用開口部Ａ部分のグロメツトシム６を、押
圧締結時にビード基板３，３のシリンダーボアー
用開口部Ａの縁部で挟着されるように装着したこ
とを特徴とする金属ガスケツト。 Inwardly directed beads 4, 4 are formed in a contour shape along the peripheral edge and outer peripheral edge of the cylinder bore openings A and other openings that are parallel to each other, and surface treatments 5, 5 are applied to both surfaces.
In the metal gasket, two bead substrates 3, 3 having been subjected to A metal gasket characterized in that a grommet shim 6 in a portion of the cylinder bore opening A is mounted so as to be sandwiched between the edges of the cylinder bore opening A of the bead substrates 3, 3 when press-fastening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988170097U JPH0414676Y2 (en) | 1988-12-28 | 1988-12-28 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988170097U JPH0414676Y2 (en) | 1988-12-28 | 1988-12-28 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0291267U JPH0291267U (en) | 1990-07-19 |
| JPH0414676Y2 true JPH0414676Y2 (en) | 1992-04-02 |
Family
ID=31460737
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988170097U Expired JPH0414676Y2 (en) | 1988-12-28 | 1988-12-28 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0414676Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005114053A (en) * | 2003-10-08 | 2005-04-28 | Ishikawa Gasket Co Ltd | Metal gasket |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255251A (en) * | 1985-05-09 | 1986-11-12 | Nippon Metal Gasket Kk | Laminated metal gasket |
-
1988
- 1988-12-28 JP JP1988170097U patent/JPH0414676Y2/ja not_active Expired
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61255251A (en) * | 1985-05-09 | 1986-11-12 | Nippon Metal Gasket Kk | Laminated metal gasket |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0291267U (en) | 1990-07-19 |
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