JPH038830Y2 - - Google Patents
Info
- Publication number
- JPH038830Y2 JPH038830Y2 JP17618585U JP17618585U JPH038830Y2 JP H038830 Y2 JPH038830 Y2 JP H038830Y2 JP 17618585 U JP17618585 U JP 17618585U JP 17618585 U JP17618585 U JP 17618585U JP H038830 Y2 JPH038830 Y2 JP H038830Y2
- Authority
- JP
- Japan
- Prior art keywords
- bead
- hole
- bore
- water hole
- outer peripheral
- 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 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000000498 cooling water Substances 0.000 claims description 17
- 230000002093 peripheral effect Effects 0.000 claims description 15
- 239000002184 metal Substances 0.000 claims description 13
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000003921 oil Substances 0.000 description 10
- 239000010687 lubricating oil Substances 0.000 description 7
- 239000000567 combustion gas Substances 0.000 description 5
- 239000000758 substrate Substances 0.000 description 5
- 238000013021 overheating Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052895 riebeckite Inorganic materials 0.000 description 1
- 230000003313 weakening effect Effects 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〕
本考案は内燃機関用の金属ガスケツトに関す
る。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a metal gasket for internal combustion engines.
最近では従来のアスベスト製ガスケツトに代え
て金属ガスケツトが広く使用されている。この金
属ガスケツトは薄板状の金属製基板にシリンダボ
アや冷却水通路に対応して孔を穿設し、これらの
孔り周りにシール用のビードを形成している。こ
のような金属ガスケツトとして例えば実開昭57−
193949号公報に記載されているようにシリンダボ
ア周りに断面円弧状のビードを形成し、ガスケツ
トの外周縁に段差型ビードを形成した金属ガスケ
ツトが公知である。また、実開昭57−18744号公
報に記載されているようにシリンダボア周りに断
面円弧状のビードを形成し、冷却水孔周りに断面
円弧状のビードを形成した金属ガスケツトが公知
である。
Recently, metal gaskets have been widely used in place of conventional asbestos gaskets. This metal gasket has holes formed in a thin metal substrate corresponding to cylinder bores and cooling water passages, and sealing beads formed around these holes. As such a metal gasket, for example,
As described in Japanese Patent No. 193949, a metal gasket is known in which a bead with an arcuate cross section is formed around the cylinder bore and a stepped bead is formed on the outer periphery of the gasket. Further, as described in Japanese Utility Model Application Publication No. 57-18744, a metal gasket is known in which a bead with an arcuate cross section is formed around the cylinder bore, and a bead with an arcuate cross section is formed around the cooling water hole.
しかしながらの上記の実開昭57−193949号公報
に記載された金属ガスケツトでは冷却水孔周りに
ビードを設けることについて考慮が払われていな
いために例えば燃焼ガスが漏洩した場合にはこの
燃焼ガスがただちに冷却水内に流入し、その結果
オーバーヒートが発生するという問題を生ずる。
一方、実開昭57−18744号公報に記載された金属
ガスケツトではガスケツトの外周縁にビードに設
けられていないために冷却水等が外部へ漏洩しや
すいという問題がある。
However, in the metal gasket described in the above-mentioned Japanese Utility Model Publication No. 57-193949, no consideration is given to providing beads around the cooling water holes, so that if combustion gas leaks, for example, this combustion gas This immediately flows into the cooling water, resulting in the problem of overheating.
On the other hand, the metal gasket described in Japanese Utility Model Publication No. 57-18744 has a problem in that cooling water and the like tend to leak to the outside because a bead is not provided on the outer periphery of the gasket.
上記問題点を解決するために本考案によれば内
燃機関用の金属ガスケツトにおいて、シリンダボ
ア孔を包囲するボアビードを断面円弧状のビード
から形成し、ガスケツトの全外周縁に沿つて延び
る外周ビードを段差型ビードから形成し、冷却水
孔を包囲する水孔ビードを段差型ビードから形成
し、ボアビードのばね強さを外周ビードのばね強
さよりも強くすると共に外周ビードのばね強さを
水孔ビードのばね強さよりも強くしている。
In order to solve the above problems, according to the present invention, in a metal gasket for an internal combustion engine, the bore bead surrounding the cylinder bore hole is formed from a bead having an arcuate cross section, and the outer peripheral bead extending along the entire outer periphery of the gasket is formed into a stepped shape. The water hole bead surrounding the cooling water hole is formed from a stepped bead, and the spring strength of the bore bead is made stronger than that of the outer bead, and the spring strength of the outer bead is made stronger than that of the water hole bead. It is stronger than the spring strength.
第１図を参照すると、１は例えば0.2mm〜0.3mm
のSUSばね板からなる基板、２はシリンダボア
に対応して穿設されたシリンダボア孔、３はシリ
ンダヘツドおよびシリンダブロツクに形成された
冷却水通路に対応して穿設された冷却水孔、４は
シリンダヘツドおよびシリンダブロツクに形成さ
れた潤滑油通路に対応して穿設された潤滑油孔、
５はボルト孔を夫々示す。第１図および第２図を
参照すると、各シリンダボア孔２の周りにはシリ
ンダボア孔２を包囲するようにシリンダボア孔２
の全外周縁に沿つて延びる断面円弧状のボアビー
ド６が形成される。また、基板１の外周縁には基
板１の全外周に沿つて延びる段差型外周ビード７
が形成される。なお、本願明細書において段差型
ビード７とは孔又は外方に向けて基板１の平面に
対して傾斜して延びる傾斜部と、この傾斜部の先
端から孔又は外方に向けて基板１の平面に対して
平行に延びる平坦端部とにより構成されるビード
をいう。一方、各冷却水孔３の周りには冷却水孔
３を包囲するように冷却水孔３の全外周縁に沿つ
て延びる段差型水孔ビード８が形成され、各潤滑
油孔４の周りには潤滑油孔４を包囲するように潤
滑油孔４の全外周縁に沿つて延びる段差型油孔ビ
ード９が形成される。
Referring to Figure 1, 1 is, for example, 0.2mm to 0.3mm
2 is a cylinder bore hole drilled corresponding to the cylinder bore, 3 is a cooling water hole drilled corresponding to the cooling water passage formed in the cylinder head and cylinder block, 4 is a board made of SUS spring plate. Lubricating oil holes drilled corresponding to the lubricating oil passages formed in the cylinder head and cylinder block,
5 indicates bolt holes, respectively. Referring to FIGS. 1 and 2, each cylinder bore hole 2 is surrounded by a cylinder bore hole 2.
A bore bead 6 having an arc-shaped cross section is formed extending along the entire outer periphery of the bore bead 6 . Further, on the outer periphery of the substrate 1, there is a stepped outer periphery bead 7 extending along the entire outer periphery of the substrate 1.
is formed. Note that in this specification, the stepped bead 7 refers to a hole or an inclined part extending outward at an angle with respect to the plane of the substrate 1, and a hole or an inclined part extending outward from the tip of the inclined part to the hole or outward of the substrate 1. A bead consisting of a flat end extending parallel to a plane. On the other hand, a stepped water hole bead 8 is formed around each cooling water hole 3 and extends along the entire outer periphery of the cooling water hole 3 so as to surround the cooling water hole 3. A stepped oil hole bead 9 is formed which extends along the entire outer periphery of the lubricating oil hole 4 so as to surround the lubricating oil hole 4.
第２図に示されるように断面円弧状をなすボア
ビード６の高さh1は段差型外周ビード７の高さh2
よりも高く、外周ビード７の高さh2は段差型水孔
ビード８の高さh3よりも高く形成されている。ま
た、外周ビード７の傾斜部の長さl2は水孔ビード
８の傾斜部の長さl3よりも短かく形成されてい
る。なお、油孔ビード９の断面形状は水孔ビード
８の断面形状と同じなので特に図面には示してい
ない。第３図は各ビードの荷重Ｐと歪Ｓとの関係
を示している。第３図においてＡはボアビード６
を示し、Ｂは外周ビード７を示し、Ｃは水孔ビー
ド８および油孔ビード９を示す。ボアビード６は
その断面形状から最もばね強さが強く、従つて第
３図においてはＡで示されるように最も急な直線
をなす。一方、外周ビード７は水孔ビード８に比
べて高さh2が高く、傾斜部の長さl2が短かいため
にばね強さは水孔ビード８に比べて強くなつてい
る。従つて各ビードのばね強さを比較するとボア
ビード６のばね強さが最も強く、次いで外周ビー
ド７のばね強さが強く、水孔ビード８および油孔
ビード９のばね強さが最も弱いことになる。 As shown in FIG. 2, the height h 1 of the bore bead 6, which has an arcuate cross section, is the height h 2 of the stepped outer peripheral bead 7.
The height h2 of the outer peripheral bead 7 is higher than the height h3 of the stepped water hole bead 8. Further, the length l 2 of the inclined portion of the outer peripheral bead 7 is formed to be shorter than the length l 3 of the inclined portion of the water hole bead 8. Note that the cross-sectional shape of the oil hole bead 9 is the same as the cross-sectional shape of the water hole bead 8, so it is not particularly shown in the drawings. FIG. 3 shows the relationship between load P and strain S of each bead. In Figure 3, A is the bore bead 6
, B indicates the outer peripheral bead 7, and C indicates the water hole bead 8 and the oil hole bead 9. The bore bead 6 has the strongest spring strength due to its cross-sectional shape, and thus forms the steepest straight line as indicated by A in FIG. On the other hand, the outer peripheral bead 7 has a higher height h 2 than the water hole bead 8 and a shorter length l 2 of the inclined portion, so that the spring strength is stronger than that of the water hole bead 8. Therefore, when comparing the spring strengths of each bead, the spring strength of the bore bead 6 is the strongest, followed by the outer peripheral bead 7, and the water hole bead 8 and oil hole bead 9 have the weakest spring strength. Become.
各ビードのうちで最も高圧が作用するのはボア
ビード６であり、従つてボアビード６のばね強さ
は最も強くなつている。一方、冷却水圧および潤
滑油圧は低いので水孔ビード８および油孔ビード
９のばね強さは弱くても十分に冷却水および潤滑
油の漏洩を阻止することができる。またこれら水
孔ビード８および油孔ビード９のばね強さを強く
すると冷却水孔３および潤滑油孔５は分散配置さ
れているので集中応力が発生してシリンダボアに
歪が発生するという問題を生ずるがこれら水孔ビ
ード８および油孔ビード９のばね強さを弱くする
ことによつてこのような問題が発生するのを阻止
することができる。また、外周ビード７を水孔ビ
ード８、油孔ビード９よりも弱くするとボルト締
付け力の大部分をシリンダボアビード６および水
孔ビード８、油孔ビード９が受けることになるの
で外周ビード７のシール能力が著るしく低下し、
外周ビード７を設けた意味がなくなる。従つて外
周ビード７のばね強さは水孔ビード８、油孔ビー
ド９のばね強さよりも形成されている。 Among the beads, the highest pressure is applied to the bore bead 6, and therefore the spring strength of the bore bead 6 is the strongest. On the other hand, since the cooling water pressure and the lubricating oil pressure are low, even if the spring strength of the water hole bead 8 and the oil hole bead 9 is weak, leakage of the cooling water and lubricating oil can be sufficiently prevented. Furthermore, if the spring strength of the water hole bead 8 and the oil hole bead 9 is increased, since the cooling water hole 3 and the lubricating oil hole 5 are arranged in a dispersed manner, a problem arises in that concentrated stress is generated and distortion occurs in the cylinder bore. However, by weakening the spring strength of these water hole beads 8 and oil hole beads 9, such problems can be prevented from occurring. Furthermore, if the outer peripheral bead 7 is made weaker than the water hole bead 8 and the oil hole bead 9, most of the bolt tightening force will be received by the cylinder bore bead 6, water hole bead 8, and oil hole bead 9, so the outer peripheral bead 7 will be sealed. ability is significantly reduced,
The provision of the outer peripheral bead 7 becomes meaningless. Therefore, the spring strength of the outer peripheral bead 7 is greater than that of the water hole bead 8 and the oil hole bead 9.
本考案によればボアビードに加えて外周ビード
および水孔ビードを設けることによりたとえ燃焼
ガスが漏洩しても燃焼ガスが外部に漏洩すること
がなく、また燃焼ガスが冷却水内に流入すること
がないのでオーバヒートが発生することもない。
更に、水孔ビードのばね強さを最も弱くすること
によつてシリンダボアに歪が生ずるのを阻止する
ことができ、更に外周ビードがシール機能を十分
に発揮することができる。
According to the present invention, by providing an outer peripheral bead and a water hole bead in addition to the bore bead, even if combustion gas leaks, the combustion gas will not leak outside, and the combustion gas will not flow into the cooling water. Since there is no overheating, there is no chance of overheating.
Furthermore, by making the spring strength of the water hole bead the weakest, it is possible to prevent distortion from occurring in the cylinder bore, and furthermore, the outer circumferential bead can fully perform its sealing function.
第１図は金属ガスケツトの平面図、第２図は第
１図の−線に沿つてみた断面図、第３図は各
ビードのばね強さを示す線図である。
１……基板、２……シリンダボア孔、３……冷
却水孔、６……ボアビード、７……外周ビード、
８……水孔ビード。
FIG. 1 is a plan view of the metal gasket, FIG. 2 is a sectional view taken along the - line in FIG. 1, and FIG. 3 is a diagram showing the spring strength of each bead. 1... Board, 2... Cylinder bore hole, 3... Cooling water hole, 6... Bore bead, 7... Outer periphery bead,
8...Water hole bead.
Claims (1)
ダボア孔を包囲するボアビードを断面円弧状のビ
ードから形成し、ガスケツトの全外周縁に沿つて
延びる外周ビードを段差型ビードから形成し、冷
却水孔を包囲する水孔ビードを段差型ビードから
形成し、該ボアビードのばね強さを外周ビードの
ばね強さよりも強くすると共に外周ビードのばね
強さを水孔ビードのばね強さよりも強くした内燃
機関用金属ガスケツト。 In a metal gasket for an internal combustion engine, the bore bead surrounding the cylinder bore hole is formed from a bead with an arcuate cross section, the outer peripheral bead extending along the entire outer periphery of the gasket is formed from a stepped bead, and the water surrounding the cooling water hole is A metal gasket for an internal combustion engine in which a hole bead is formed of a stepped bead, and the spring strength of the bore bead is stronger than that of an outer peripheral bead, and the spring strength of the outer peripheral bead is stronger than that of a water hole bead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17618585U JPH038830Y2 (en) | 1985-11-18 | 1985-11-18 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17618585U JPH038830Y2 (en) | 1985-11-18 | 1985-11-18 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6286459U JPS6286459U (en) | 1987-06-02 |
| JPH038830Y2 true JPH038830Y2 (en) | 1991-03-05 |
Family
ID=31116189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17618585U Expired JPH038830Y2 (en) | 1985-11-18 | 1985-11-18 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH038830Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01300043A (en) * | 1988-05-24 | 1989-12-04 | Japan Metal Gasket Co Ltd | Metal gasket |
| JP2543992Y2 (en) * | 1989-09-18 | 1997-08-13 | マツダ株式会社 | Engine seal structure |
-
1985
- 1985-11-18 JP JP17618585U patent/JPH038830Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6286459U (en) | 1987-06-02 |
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