JPH01208554A - Metal gasket - Google Patents
Metal gasketInfo
- Publication number
- JPH01208554A JPH01208554A JP3201688A JP3201688A JPH01208554A JP H01208554 A JPH01208554 A JP H01208554A JP 3201688 A JP3201688 A JP 3201688A JP 3201688 A JP3201688 A JP 3201688A JP H01208554 A JPH01208554 A JP H01208554A
- Authority
- JP
- Japan
- Prior art keywords
- plate
- sub
- base plate
- bolt
- combustion chamber
- 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.)
- Pending
Links
- 239000002184 metal Substances 0.000 title claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 34
- 239000000758 substrate Substances 0.000 claims description 24
- 239000011324 bead Substances 0.000 claims description 18
- 230000008602 contraction Effects 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 20
- 230000000694 effects Effects 0.000 description 8
- 239000000567 combustion gas Substances 0.000 description 7
- 125000006850 spacer group Chemical group 0.000 description 7
- 230000007423 decrease Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 2
- 238000007665 sagging Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000007751 thermal spraying Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02F—CYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
- F02F11/00—Arrangements of sealings in combustion engines
- F02F11/002—Arrangements of sealings in combustion engines involving cylinder heads
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Gasket Seals (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は金属ガスケットに係り、特に締結時に生ずる
燃焼室周りの異なるデツキ面間隙の不整を補償し得ると
ともに燃焼圧力による前記燃焼室周りのデツキ面間隙の
拡縮を防止し得て、また、デツキ面に均等にシール圧を
作用させ得て、安定したシールを果し得る金属ガスケッ
トに関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a metal gasket, and in particular, it is capable of compensating for irregularities in gaps between different deck surfaces around a combustion chamber that occur during fastening, and is capable of reducing deck gaps around the combustion chamber due to combustion pressure. The present invention relates to a metal gasket that can prevent the gap between surfaces from expanding or contracting, can apply sealing pressure evenly to the deck surface, and can achieve stable sealing.
被接合部材の接合面のシール、例えば内燃機関のシリン
ダヘッドとシリンダブロックとのデツキ面間のシールに
利用されている金属ガスケットは、シール面をシールす
べく形成されたビードを被接合部材を接合するボルト等
の締結力により弾性変形させ、この弾性変形時の弾性復
元力及び弾性復元量によりデツキ面に弾性的なシール線
を形成する。これにより、デツキ面間のシールを果すと
ともにデツキ面の歪に追従させてシール効果の維持を果
している。Metal gaskets, which are used to seal the joining surfaces of parts to be joined, for example, between the deck surfaces of cylinder heads and cylinder blocks in internal combustion engines, use beads formed to seal the sealing surfaces to join the parts to be joined. It is elastically deformed by the fastening force of bolts, etc., and an elastic seal line is formed on the deck surface by the elastic restoring force and amount of elastic restoring at the time of this elastic deformation. This achieves a seal between the deck surfaces and maintains the sealing effect by following the distortion of the deck surfaces.
このような金属ガスケットをシリンダヘッドとシリンダ
ブロックとのデツキ面間に介装してボルト等により締結
すると、この締結力によりシリンダヘッドが歪んでデツ
キ面間隙に不整を生じ、特に燃焼室周りのデツキ面間隙
が大となるとともにこの間隙が燃焼圧力により拡縮する
問題がある。When such a metal gasket is inserted between the deck surfaces of the cylinder head and cylinder block and fastened with bolts, etc., the cylinder head is distorted due to the tightening force, causing irregularities in the deck surface gap, and especially the deck around the combustion chamber. There is a problem that as the surface gap becomes larger, this gap expands and contracts due to combustion pressure.
また、ボルト締結力は、ボルト締結部位から離間するに
従い低下して作用することにより、ボルト締結部位の近
傍とボルト締結部位から離間する箇所とではボルト締結
力が異って作用し、ボルト締結部位から離間する箇所で
はボルト締結部位近傍よりも小さい締結力が作用してデ
ツキ面間隙に差が生じ、ビードによるシール圧が低下す
る問題があった。In addition, the bolt fastening force decreases as it moves away from the bolt fastening part, so the bolt fastening force acts differently in the vicinity of the bolt fastening part and in the part far away from the bolt fastening part. There is a problem in that a smaller fastening force acts at a location away from the bolt than in the vicinity of the bolt fastening area, resulting in a difference in the deck surface gap and a reduction in the sealing pressure due to the bead.
そこで、このような問題を解消するために、基板に積層
した副板の燃焼室孔側端縁を基板面上に折返して所定厚
さの補償部を設け、この補償部によりデツキ面間隙の不
整を補償するとともにデツキ面間隙の拡縮を防止する金
属ガスケットがある。Therefore, in order to solve this problem, the edge of the combustion chamber hole side of the sub-plate laminated on the board is folded back onto the board surface to form a compensating part of a predetermined thickness, and this compensating part corrects the irregularities in the deck surface gap. There is a metal gasket that compensates for this and prevents the deck surface gap from expanding or contracting.
また、基板の燃焼室孔周りにスペーサ部材を取着してボ
ルト締結部位から離間するに従い厚さが漸次増大する補
償部を設けてデツキ面間隙の不整を補償するとともに拡
縮を防止し、また、ボルト締結部位から離間するに従い
ビード高さを大きくしビード幅を小さくすることにより
ばね定数を大としたビードを形成してシール圧を均等に
する金属ガスケットがある。In addition, a spacer member is attached around the combustion chamber hole of the board to provide a compensation part whose thickness gradually increases as it moves away from the bolt fastening part to compensate for irregularities in the deck surface gap and prevent expansion and contraction. There is a metal gasket in which the height of the bead increases and the width of the bead decreases as the distance from the bolted area increases, thereby forming a bead with a large spring constant to equalize the sealing pressure.
ところが、これら従来の金属ガスケットにおいては、副
板を基板面上に折返して燃焼室周りに所定厚さの補償部
を設けただけなので、ボルト締結力が異って作用するこ
とにより生じたボルト締結部位の近傍とボルト締結部位
から離間する箇所との異なるデツキ間隙の不整を補償し
得ない不都合がある。また、スペーサ部材の厚さを異な
らせて取着しているので、構造が複雑であり、製作時の
工程数が大となってコスト的に不利になるという不都合
があるとともに、前記スペーサ部材は別部材として基板
に取着しているので、振動等により脱落して補償部とし
ての機能が損なわれる場合があり、耐久性に問題があっ
た。However, in these conventional metal gaskets, the sub-plate is simply folded back onto the substrate surface to provide a compensating part of a predetermined thickness around the combustion chamber, so bolt tightening caused by different bolt tightening forces acts. There is a problem in that it is not possible to compensate for irregularities in the deck gap between the vicinity of the bolted part and the part separated from the bolted part. In addition, since the spacer members are attached with different thicknesses, the structure is complicated and the number of manufacturing steps is increased, which is disadvantageous in terms of cost. Since it is attached to the board as a separate member, it may fall off due to vibration or the like, impairing its function as a compensator, which poses a problem in durability.
そこで、この発明の目的は、締結時に生ずる燃焼室周り
の異なるデツキ面間隙の不整を補償し得るとともに燃焼
圧力による前記燃焼室周りのデツキ面間隙の拡縮を防止
し得て、また、デツキ面に均等にシール圧を作用させ得
て、安定したシールを果し得て、更に、製作が容易でコ
スト的に有利に実施し得て、使用寿命の長い金属ガスケ
ットを実現することにある。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to compensate for irregularities in the gaps between different deck surfaces around the combustion chamber that occur during fastening, and to prevent expansion and contraction of the gaps between the deck surfaces around the combustion chamber due to combustion pressure. The object of the present invention is to realize a metal gasket that can apply sealing pressure evenly, achieve stable sealing, is easy to manufacture, can be implemented cost-effectively, and has a long service life.
この目的を達成するために、この発明は、燃焼室孔を囲
繞するビードを形成した弾性金属板からなる基板の一側
面に副板を積層して設け、この副板の前記燃焼室孔側端
縁を前記基板の他側面に折返し重合して折返し部を形成
するとともにこの折返し部の重合する部位の前記基板に
ボルト締結部位から離間するに従い漸次高さの増大する
突出部を形成して補償部を設けたことを特徴とする。In order to achieve this object, the present invention provides a sub-plate laminated on one side of a substrate made of an elastic metal plate in which a bead surrounding a combustion chamber hole is formed, and an end of the sub-plate on the side of the combustion chamber hole. The edge is folded back and overlapped with the other side of the substrate to form a folded part, and a protruding part whose height gradually increases as the distance from the bolt fastening part increases is formed on the board at the part where the folded part overlaps, thereby forming a compensation part. It is characterized by having the following.
この発明の構成によれば、デツキ面間に介装された金属
ガスケットは、副板の燃焼室孔側端縁に形成した折返し
部の重合する部位の基板にボルト締結部位から離間する
に従い漸次高さの増大する突出部を形成して設けた補償
部によって、デツキ面間隙の小なるボルト締結部位の近
傍では小なる高さの補償部を当接させるとともにデツキ
面間隙の大なるボルト締結部位の中間では大なる高さの
補償部を当接させることにより、異なるデツキ面間隙に
対応してこれを補償し、拡縮を防止する。According to the configuration of the present invention, the metal gasket interposed between the deck surfaces gradually increases in height as the metal gasket is attached to the base plate at the overlapped portion of the folded portion formed at the edge of the combustion chamber hole side of the sub-plate as it is spaced apart from the bolted portion. By forming a protrusion that increases in height, the compensating portion has a small height in contact with the bolted portion near the bolted portion where the deck surface gap is small, and at the same time in the vicinity of the bolted portion where the decked surface gap is large. By abutting a compensating portion with a large height in the middle, it compensates for different deck surface gaps and prevents expansion and contraction.
また、この補償部は、ボルト締結部位から離間するに従
い漸次高さを増大させて設けているので、デツキ面に均
等にシール圧を作用させる。Further, since the compensating portion is provided with a height that gradually increases as it becomes farther away from the bolt fastening portion, the sealing pressure is applied evenly to the deck surface.
さらに、基板の一側面に重合した副板の燃焼室孔側端を
折返し重合して形成した折返し部とこの折返し部の重合
する部位の基板に形成した突出部とにより補償部を設け
ているので、構造が簡単であり、従来の如き別部材とし
て取着したスペーサ部材の脱落等による補償部としての
機能の損失を回避することができる。Furthermore, a compensation part is provided by a folded part formed by folding and superposing the combustion chamber hole side end of the sub-plate superimposed on one side of the substrate, and a protruding part formed on the substrate at the part where this folded part overlaps. The structure is simple, and it is possible to avoid loss of function as a compensator due to falling off of the spacer member attached as a separate member as in the conventional case.
〔実施例〕
以下図面に基づいてこの発明の実施例を詳細且つ具体的
に説明する。[Embodiments] Examples of the present invention will be described in detail and specifically below based on the drawings.
第１〜７図はこの発明の実施例を示すものである。第１
図において、２は金属ガスケット、４は基板、６は副板
である。この金属ガスケット２は、弾性金属板からなる
厚さＬｌの基板４とこの基板４の一側面４ａに積層する
厚さｔ２の副板６とにより構成される。前記基板４と副
板６とには、燃焼室孔８と、この燃焼室孔８の周辺にボ
ルト等の締結手段を挿通する複数のボルト孔１０と、オ
イル孔１２と、そして冷却水孔１４とが夫々形成されて
いる。また、前記基板４には、燃焼室孔８を囲繞するビ
ード１６と、ボルト孔１０やオイル孔１２を囲繞する孔
ビード１８と、これら各ビード１６・１８を内包する基
板４外周縁の断面ステップ状の外周ビード２０とが形成
されている。1 to 7 show embodiments of this invention. 1st
In the figure, 2 is a metal gasket, 4 is a substrate, and 6 is a sub-plate. This metal gasket 2 is composed of a substrate 4 made of an elastic metal plate and having a thickness Ll, and a sub-plate 6 having a thickness t2 laminated on one side 4a of this substrate 4. The substrate 4 and the sub-plate 6 have a combustion chamber hole 8, a plurality of bolt holes 10 through which fastening means such as bolts are inserted around the combustion chamber hole 8, an oil hole 12, and a cooling water hole 14. are formed respectively. Further, the substrate 4 includes a bead 16 surrounding the combustion chamber hole 8, a hole bead 18 surrounding the bolt hole 10 and the oil hole 12, and a cross-sectional step of the outer peripheral edge of the substrate 4 that includes each of these beads 16 and 18. A shaped outer peripheral bead 20 is formed.
前記基板４の一側面４ａに積層された副板６の燃焼室孔
８例の端縁６ｅは、基板４の燃焼室孔８側の端縁４ｅを
内包して基板４の他側面４ｂに折返して重合し、折返し
部２２を形成する。この折返し部２２の重合する部位の
基板４には、ボルト孔１０から離間するに従い漸次高さ
の増大する突出部２４を形成して補償部２６を設けてい
る。これにより、補償部２６は、基板４の厚さｔｌ及び
副板６の厚さｔ２と副板６の折返し部２２の厚さｔ２に
加えてボルト孔１０から離間するに従い漸次高さの増大
する突出部２４により、第２〜４図の如く、ボルト孔１
０の近傍においては小なる高さｈｌを有し、ボルト孔Ｉ
Ｏから離間するに従い漸次高さが増大して高さｈ２を有
し、ボルト孔１０の中間においては大なる高さｈ３を有
して形成される。The edges 6e of the eight combustion chamber holes of the sub-plate 6 stacked on one side surface 4a of the substrate 4 are folded back to the other side surface 4b of the substrate 4, including the edges 4e of the substrate 4 on the combustion chamber hole 8 side. The folded portion 22 is formed by polymerization. A compensating portion 26 is provided on the substrate 4 at a portion where the folded portion 22 overlaps with a protruding portion 24 whose height gradually increases as the distance from the bolt hole 10 increases. Thereby, in addition to the thickness tl of the substrate 4, the thickness t2 of the sub-plate 6, and the thickness t2 of the folded part 22 of the sub-plate 6, the height of the compensating part 26 gradually increases as the distance from the bolt hole 10 increases. As shown in FIGS. 2 to 4, the protrusion 24 allows the bolt hole 1 to be
In the vicinity of 0, the height hl is small, and the bolt hole I
The height gradually increases as the distance from O is increased to a height h2, and the height h3 is large in the middle of the bolt hole 10.
また、第５〜７図において、２８・３０は夫々内燃機関
を構成するシリンダヘッドとシリンダブロックとであり
、このシリンダヘッド２８のデツキ面２８ｄとシリンダ
ブロック３０のデツキ面３０ｄ間に金属ガスケット２を
介装し、締結用ボルト３２により締結する。なお、符号
３４は燃焼室、Ｓｌ・Ｓ２・Ｓ３は燃焼室孔８側のシリ
ンダヘッド２８及びシリンダブロック３０間に形成され
る夫々ボルト孔１０の近傍とボルト孔１０から離間する
箇所とボルト孔１０の中間とにおけるデツキ面間隙であ
る。Further, in FIGS. 5 to 7, 28 and 30 are a cylinder head and a cylinder block, respectively, which constitute an internal combustion engine, and a metal gasket 2 is installed between the deck surface 28d of the cylinder head 28 and the deck surface 30d of the cylinder block 30. It is interposed and fastened with a fastening bolt 32. Note that reference numeral 34 denotes a combustion chamber, and Sl, S2, and S3 denote a portion near the bolt hole 10, a portion spaced apart from the bolt hole 10, and a portion formed between the cylinder head 28 and the cylinder block 30 on the side of the combustion chamber hole 8, and the bolt hole 10, respectively. This is the gap between the deck surfaces in the middle of .
なお、基板４と副板６とを一体的に結合する場合には、
例えばボルト孔１０に中空円筒状の止め具（図示せず）
を挿入するとともに止め具の両端部を基板４、副板６面
上に折曲げてかしめを施したり、あるいは基板４、副板
６の外縁部の一部を突出させて形成し、これ等の突出部
位をスポット溶接やリベット化めする。In addition, when combining the board 4 and the sub-plate 6 integrally,
For example, a hollow cylindrical stopper (not shown) is installed in the bolt hole 10.
At the same time as inserting the stopper, both ends of the stopper are bent onto the surface of the board 4 and sub-plate 6 and caulked, or a part of the outer edge of the board 4 and sub-plate 6 is formed to protrude. Spot weld or rivet the protruding parts.
次に作用を説明する。Next, the effect will be explained.
シリンダヘッド２８とシリンダブロック３０とのデツキ
面２８ｄ・３０ｄ間に介装された金属ガスケット２は、
ボルト孔１０に挿通する締結手段たる締結用ボルト３２
の締結力により圧縮され、各ビード１６〜２０は、高さ
を低減して圧縮変形される。この変形により各ビード１
６〜２０は、シリンダヘッド２８とシリンダブロック３
０との各デツキ面２８ｄ・３０ｄに圧接してシール線を
形成し、シールを果す。The metal gasket 2 interposed between the deck surfaces 28d and 30d of the cylinder head 28 and the cylinder block 30 is
A fastening bolt 32 serving as a fastening means inserted into the bolt hole 10
, and each bead 16 to 20 is compressed and deformed by reducing its height. Due to this deformation, each bead 1
6 to 20 are the cylinder head 28 and cylinder block 3
0 and the respective deck surfaces 28d and 30d to form a seal line and achieve sealing.
このとき、締結用ボルト３２の締結力によりシリンダヘ
ッド２８が湾曲して歪みを生じ、特に、燃焼室３４周り
のデツキ面２８ｄ・３０ｄの間隙が大となる問題がある
。また、このデツキ面間隙は、ボルト締結力がボルト孔
１０の近傍では大きく作用し、ボルト孔１０から離間す
るに従い低下し、ボルト孔１０の中間においては小さく
作用することにより、第５〜７図に示す如く異なるデツ
キ面間隙Ｓ１・Ｓ２・Ｓ３を生じた。At this time, the cylinder head 28 is bent and distorted by the fastening force of the fastening bolt 32, and there is a problem in particular that the gap between the deck surfaces 28d and 30d around the combustion chamber 34 becomes large. Further, this deck surface gap is determined by the fact that the bolt fastening force acts strongly near the bolt hole 10, decreases as it moves away from the bolt hole 10, and acts small in the middle of the bolt hole 10, as shown in Figs. As shown in the figure, different deck surface gaps S1, S2, and S3 were created.
即ち、ボルト孔１０の近傍においては小なるデツキ面間
隙Ｓ１を生じ、ボルト孔ＩＯから離間するに従い漸次増
大してデツキ面間隙Ｓ２を生じ、ボルト孔１０から離間
する中間の箇所においては大なるデツキ面間隙Ｓ３を生
じることになる。That is, a small deck surface gap S1 is generated in the vicinity of the bolt hole 10, and gradually increases as the distance from the bolt hole IO increases to create a deck surface gap S2, and a large deck surface gap S2 is generated at an intermediate location away from the bolt hole 10. This results in a surface gap S3.
しかし、ボルト孔１０の近傍においては小なる高さｈｌ
を有し、ボルト孔１０から離間するに従い漸次高さが増
大して高さｈ２を有し、ボルト孔１０の中間においては
大なる高さｈ３を有する補償部２６を、それぞれボルト
孔１０の近傍の小なるデツキ面間隙Ｓ１とボルト孔１０
から離間するに従い漸次増大したデツキ面間隙Ｓ２とボ
ルト孔１０から離間する中間の箇所の大なるデツキ面間
隙Ｓとに当接させることによって、この異なるデツキ面
間隙Ｓ１・Ｓ２・Ｓ３に対応してこれを補償することが
でき、また、燃焼圧力によるデツキ面間隙Ｓ１・Ｓ２・
Ｓ３の拡縮を防止することができる。However, in the vicinity of the bolt hole 10, the height hl is small.
, and the height gradually increases as the distance from the bolt hole 10 increases to a height h2, and the compensation part 26 has a large height h3 in the middle of the bolt hole 10. Small deck surface gap S1 and bolt hole 10
By contacting the deck surface gap S2, which gradually increases as the distance from the bolt hole 10 increases, and the large deck surface gap S at the intermediate location away from the bolt hole 10, it is possible to correspond to the different deck surface gaps S1, S2, and S3. This can be compensated for, and deck surface gaps S1, S2, and
Expansion/contraction of S3 can be prevented.
このため、デツキ面間隙Ｓ１・Ｓ２・Ｓ３からの燃焼ガ
スのリークを防止でき、このリークした燃焼ガスによる
金属ガスケット２の汚損や含有した物質の体積によるシ
ール効果の低減を防止し得る。さらに、ビード１６に作
用する交番荷重を弱化させてビード１６のへたりを防止
して使用寿命を長くし、締結用ボルト３２やこのボルト
３２の係合するシリンダヘッド２８部位の損壊を防止し
得るとともに、締結用ボルト３２の締結力の低下を防止
し得て、安定したシール効果を得ることができる。Therefore, it is possible to prevent the combustion gas from leaking from the deck surface gaps S1, S2, and S3, and it is possible to prevent the metal gasket 2 from being contaminated by the leaked combustion gas and from reducing the sealing effect due to the volume of the contained substance. Furthermore, it is possible to weaken the alternating load acting on the bead 16 to prevent the bead 16 from becoming sagging, thereby extending its service life and preventing damage to the fastening bolt 32 and the portion of the cylinder head 28 that the bolt 32 engages with. At the same time, a decrease in the fastening force of the fastening bolt 32 can be prevented, and a stable sealing effect can be obtained.
また、金属ガスケット２を介してシリンダブロック３０
にシリンダヘッド２８を締結用ボルト３２によって締結
した際に、ボルト孔１０の近傍とこのボルト孔１０から
離間する箇所とでは締結力が異なって作用し、この離間
した箇所ではボルト孔１０の近傍よりも締結力が弱化し
て作用することによりシール圧が低くなり、燃焼ガスの
リークが発生する不都合があった。Also, the cylinder block 30 is connected via the metal gasket 2.
When the cylinder head 28 is fastened with the fastening bolts 32, the fastening force acts differently in the vicinity of the bolt hole 10 and in the part spaced apart from the bolt hole 10, and in this spaced part, the fastening force acts more than in the vicinity of the bolt hole 10. However, the sealing pressure becomes low due to the weakening of the fastening force, resulting in the inconvenience of leakage of combustion gas.
しかし、補償部２６は、ボルト孔１０から離間するに従
い漸次高さを増大させて設けていることにより、ボルト
締結力の充分なボルト孔１０の近傍におけるシール圧を
確保することができるとともに、ボルト締結力が低下し
て作用するボルト孔１０から離間する箇所におけるシー
ル圧の低下を防止することができ、これによりデツキ面
２８ｄ・３０ｄにシール圧を均等に作用させて燃焼ガス
のリークを防止することができる。However, by providing the compensating portion 26 with a height that gradually increases as the distance from the bolt hole 10 increases, it is possible to ensure sealing pressure in the vicinity of the bolt hole 10 with sufficient bolt fastening force, and It is possible to prevent a decrease in seal pressure at a location away from the bolt hole 10, where the fastening force is reduced, and thereby the seal pressure is applied evenly to the deck surfaces 28d and 30d, thereby preventing leakage of combustion gas. be able to.
さらに、基板４の一側面４ａに重合した副板６の燃焼室
孔側端縁６ｅを折返し重合して形成した折返し−２２と
この折返し部２２の重合する部位の基板４に形成した突
出部２４とにより補償部２６を設けているので、従来の
如き厚さを異ならせたスペーサ部材の取着等を要せず、
構造が簡単であり、製作時の工程数を小としてコスト的
に有利に実施することができる。また、従来の如き別部
材として取着したスペーサ部材が振動等により脱落して
補償部としての機能が損なわれる不都合を回避すること
ができ、使用寿命の長いメタルガスケットを実現するこ
とができる。Further, a folded part 22 formed by folding and superposing the combustion chamber hole side edge 6e of the sub-plate 6 superimposed on one side surface 4a of the substrate 4, and a protruding part 24 formed on the substrate 4 at the part where the folded part 22 overlaps. Since the compensating portion 26 is provided, there is no need to attach spacer members with different thicknesses as in the past.
The structure is simple, and the number of manufacturing steps is small, making it possible to implement cost-effectively. Further, it is possible to avoid the conventional problem in which the spacer member attached as a separate member falls off due to vibration or the like and loses its function as a compensator, and it is possible to realize a metal gasket with a long service life.
なお、基板４の突出部２４と副板６との間に形成される
空間２４ａに、金属粉を固結させ、また溶射し、あるい
はハンダを溶かして埋込む等充填物を充填することによ
りこの突出部２４を押しつぶされることのない剛体に構
成することができ、これによりつぶれを防止してシール
性を確保することができる。Note that this can be achieved by filling the space 24a formed between the protrusion 24 of the substrate 4 and the sub-plate 6 with a filler such as solidifying metal powder, thermal spraying, or melting and embedding solder. The protruding portion 24 can be formed into a rigid body that cannot be crushed, thereby preventing crushing and ensuring sealing performance.
このように、この発明によれば、副板の燃焼室孔側端縁
に形成した折返し部の重合する部位の基板にボルト締結
部位から離間するに従い漸次高さの増大する突出部を形
成して設けた補償部によって、異なるデツキ面間隙に対
応してこれを補償することができ、また、燃焼圧力によ
るデツキ面間隙の拡縮を防止することができる。As described above, according to the present invention, a protruding portion whose height gradually increases as the distance from the bolt fastening portion increases is formed on the base plate at the portion where the folded portion formed at the edge of the sub-plate on the side of the combustion chamber hole overlaps. The provided compensation section can compensate for different deck surface gaps, and can also prevent the deck surface gaps from expanding or contracting due to combustion pressure.
このため、デツキ面間隙からの燃焼ガスのリークを防止
でき、このリークした燃焼ガスによるメタルガスケット
の汚損や含有した物質の体積によるシール効果の低減を
防止し得る。さらに、ビードに作用する交番荷重を弱化
させてビードのへたりを防止し得て使用寿命を長くし、
締結用ボルトやボルトの係合するシリンダヘッド部位の
損壊を防止し得るとともに、締結用ボルトの締結力の低
下を防止し得て、安定したシール効果を果し得る。Therefore, leakage of combustion gas from the deck surface gap can be prevented, and the metal gasket can be prevented from being contaminated by the leaked combustion gas and the sealing effect can be prevented from being reduced due to the volume of the contained substance. Furthermore, by weakening the alternating load acting on the bead, it can prevent the bead from becoming sagging, extending its service life.
It is possible to prevent damage to the fastening bolt and the cylinder head portion to which the bolt engages, and also to prevent a decrease in the fastening force of the fastening bolt, thereby achieving a stable sealing effect.
また、この補償部は、ボルト締結部位から離間するに従
い漸次高さを増大させて設けているので、ボルト締結力
の充分なボルト締結部位の近傍におけるシール圧を確保
し得るとともに、ボルト締結力が弱化して作用するボル
ト締結部位から離間する箇所におけるシール圧の低下を
防止することができ、これによりデツキ面にシール圧を
均等に作用させ得て、燃焼ガスのリークを防止すること
ができる。In addition, since the compensating portion is provided with a height that gradually increases as it moves away from the bolt fastening site, it is possible to ensure sealing pressure in the vicinity of the bolt fastening site where sufficient bolt fastening force is applied, and to reduce the bolt fastening force. It is possible to prevent the sealing pressure from decreasing at a location separated from the weakened bolt fastening region, thereby making it possible to apply the sealing pressure evenly to the deck surface, thereby preventing leakage of combustion gas.
さらに、基板の一側面に重合した副板の燃焼室孔側端縁
を折返し重合して形成した折返し部とこの折返し部の重
合する部位の基板に形成した突出部とにより補償部を設
けているので、従来の如き厚さを異ならせたスペーサ部
材の取着等を要せず、構造が簡単であり、製作時の工程
数を小とし得てコスト的に有利に実施し得るものである
。また、従来の如き別部材として取着したスペーサ部材
が振動等により脱落して補償部としての機能が損なわれ
る不都合を回避し得て、使用寿命の長い金属ガスケット
を実現することができる。Furthermore, a compensation part is provided by a folded part formed by folding and superimposing the edge of the sub-plate on the side of the combustion chamber hole overlapped with one side of the substrate, and a protrusion part formed on the board at the part where the folded part overlaps. Therefore, there is no need to attach spacer members having different thicknesses as in the conventional method, the structure is simple, the number of manufacturing steps can be reduced, and it can be implemented cost-effectively. Furthermore, it is possible to avoid the conventional problem in which the spacer member attached as a separate member falls off due to vibration or the like and loses its function as a compensator, and it is possible to realize a metal gasket with a long service life.
第１〜７図はこの発明の実施例を示し、第１図は金属ガ
スケットの要部平面図、第２図は第１図のｎ−ｍ線によ
る拡大断面図、第３図は第１図のｍ−ｍ線による拡大断
面図、第４図は第１図の■−ＩＶ線による拡大断面図、
第５〜７図は夫々接合部に介装した状態における金属ガ
スケットの■−■〜ＩＶ−ｆＶ線部位の要部拡大断面図
である。
図において、２は金属ガスケット、４は基板、６は副板
、８は燃焼室孔、ｌＯはボルト孔、１６はビード、２２
は折返し部、２４は突出部、２６は補償部、２８はシリ
ンダヘッド、３０はシリンダブロック、３２は締結用ボ
ルト、３４は燃焼室である。
特許出願人 沼 屋 邦 間
第５図
第６図
ｃ″′ｌ＼1 to 7 show embodiments of the present invention, FIG. 1 is a plan view of the main part of a metal gasket, FIG. 2 is an enlarged sectional view taken along the nm line of FIG. 1, and FIG. Fig. 4 is an enlarged cross-sectional view taken along the line ■-IV of Fig. 1;
5 to 7 are enlarged cross-sectional views of the main parts of the metal gaskets taken along lines 1--2 to IV-fV, respectively, when inserted in the joints. In the figure, 2 is a metal gasket, 4 is a substrate, 6 is a sub-plate, 8 is a combustion chamber hole, 1O is a bolt hole, 16 is a bead, 22
24 is a folded portion, 24 is a protruding portion, 26 is a compensation portion, 28 is a cylinder head, 30 is a cylinder block, 32 is a fastening bolt, and 34 is a combustion chamber. Patent applicant: Kunima Numaya Figure 5 Figure 6 c″’l＼
Claims (1)
らなる基板の一側面に副板を積層して設け、この副板の
前記燃焼室孔側端縁を前記基板の他側面に折返し重合し
て折返し部を形成するとともにこの折返し部の重合する
部位の前記基板にボルト締結部位から離間するに従い漸
次高さの増大する突出部を形成して補償部を設けたこと
を特徴とする金属ガスケット。1. A sub-plate is laminated on one side of a substrate made of an elastic metal plate formed with a bead surrounding a combustion chamber hole, and the edge of the sub-plate on the side of the combustion chamber hole is folded and superposed on the other side of the substrate. A metal gasket characterized in that a folded part is formed, and a compensating part is provided by forming a protruding part whose height gradually increases as the distance from the bolt fastening part increases on the substrate at a portion where the folded part overlaps. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3201688A JPH01208554A (en) | 1988-02-15 | 1988-02-15 | Metal gasket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3201688A JPH01208554A (en) | 1988-02-15 | 1988-02-15 | Metal gasket |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01208554A true JPH01208554A (en) | 1989-08-22 |
Family
ID=12347061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3201688A Pending JPH01208554A (en) | 1988-02-15 | 1988-02-15 | Metal gasket |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01208554A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10224856A1 (en) * | 2002-06-05 | 2004-01-08 | Elringklinger Ag | Cylinder head gasket |
-
1988
- 1988-02-15 JP JP3201688A patent/JPH01208554A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10224856A1 (en) * | 2002-06-05 | 2004-01-08 | Elringklinger Ag | Cylinder head gasket |
| DE10224856B4 (en) * | 2002-06-05 | 2004-05-27 | Elringklinger Ag | Cylinder head gasket |
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