JPH02252948A - Sealing member for cylinder head cover - Google Patents

Sealing member for cylinder head cover

Info

Publication number
JPH02252948A
JPH02252948A JP7450689A JP7450689A JPH02252948A JP H02252948 A JPH02252948 A JP H02252948A JP 7450689 A JP7450689 A JP 7450689A JP 7450689 A JP7450689 A JP 7450689A JP H02252948 A JPH02252948 A JP H02252948A
Authority
JP
Japan
Prior art keywords
plug
cylinder head
semicircular
rib
gasket body
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
Application number
JP7450689A
Other languages
Japanese (ja)
Inventor
Toshihiko Yahagi
谷萩 俊彦
Toshihiko Kaihou
海宝 祀彦
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.)
Kinugawa Rubber Industrial Co Ltd
Original Assignee
Kinugawa Rubber Industrial 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 Kinugawa Rubber Industrial Co Ltd filed Critical Kinugawa Rubber Industrial Co Ltd
Priority to JP7450689A priority Critical patent/JPH02252948A/en
Publication of JPH02252948A publication Critical patent/JPH02252948A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F7/00Casings, e.g. crankcases or frames
    • F02F7/006Camshaft or pushrod housings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02FCYLINDERS, PISTONS OR CASINGS, FOR COMBUSTION ENGINES; ARRANGEMENTS OF SEALINGS IN COMBUSTION ENGINES
    • F02F11/00Arrangements of sealings in combustion engines 

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Gasket Seals (AREA)

Abstract

PURPOSE:To sufficiently secure the surface pressure of a plug angular part by forming a rib directed towards the plug angular part from the center of a half circle on the both side surfaces of a semicircular plug which is press- attached onto a gasket body and transmitting the compression force onto the plug angular part through the rib. CONSTITUTION:A sealing member 1 is constituted of a gasket body 4 interposed between a cylinder head and a cylinder head cover and a semicircular plug 6 installed in a semicircular cut part on the wall part of the cylinder head. In this case, each thick part 9 having a semicircular outer peripheral part is formed on the both side surfaces of the semicircular plug 6, and a recessed part is formed on the inner peripheral part. A pair of ribs 10 are formed on the recessed part. Each rib 10 is formed into symmetrical form in the lateral direction, and inclined towards each plug angular part 6b form the center part of the half arcuate form, and extended in straight line form. Therefore, the compression force can be transmitted to each plug angular part 6b through each rib 10, and the surface pressure of each plug angular part 6b can be secured sufficiently.

Description

【発明の詳細な説明】 産業上の利用分野 この発明は、内燃機関のシリンダヘッドとシリンダヘッ
ドカバーとの間をシールするシール部材、特にシリンダ
ヘッド壁部の半円形切欠部を閉塞する半円形プラグを備
えたシール部材の改良に関する。
DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to a sealing member for sealing between a cylinder head and a cylinder head cover of an internal combustion engine, particularly a semicircular plug for closing a semicircular notch in a cylinder head wall. The present invention relates to an improvement in a sealing member provided with a seal member.

従来の技術 内燃機関のシリンダヘッドとその上面を覆うシリンダヘ
ッドカバーとの間は、ゴム等にて枠状に成形したシール
部材によってシールされるが、上記シリンダヘッドにカ
ムシャフト軸受面を機械加工する場合には、シリンダヘ
ッド面端もしくは後端の壁部に、加工孔として上記軸受
面と略同−径をなす半円形の切欠部が形成されてしまう
ので、この切欠部を閉塞するために、従来から半円形プ
ラグを備えたシール部材が用いられている(実公昭63
−9815.号公報、実公昭61−23713号公報等
参照)。
Conventional technology The cylinder head of an internal combustion engine and the cylinder head cover that covers the top surface of the cylinder head are sealed by a frame-shaped sealing member made of rubber or the like, but when a camshaft bearing surface is machined on the cylinder head, In this case, a semicircular notch with approximately the same diameter as the bearing surface is formed as a machined hole in the wall of the cylinder head surface end or rear end. Since then, a sealing member equipped with a semicircular plug has been used.
-9815. (See Japanese Utility Model Publication No. 61-23713, etc.).

第7図は、ゴム等の弾性体からなるシール部材21をシ
リンダヘッド22とシリンダヘッドカバー23との間に
装着した状態を示している。上記シール部材21は、枠
状に連続して成形されたガスケット本体24と、これに
一体に形成された半円形プラグ25とからなり、上記半
円形プラグ25がシリンダヘッド22壁部の半円形切欠
部26に嵌合しているとともに、シリンダヘッドカバー
23が図示せぬボルトにて締め付けられることによって
上記ガスケット本体24が挟圧されるようになっている
FIG. 7 shows a state in which a sealing member 21 made of an elastic material such as rubber is installed between a cylinder head 22 and a cylinder head cover 23. As shown in FIG. The sealing member 21 consists of a gasket body 24 that is continuously formed into a frame shape and a semicircular plug 25 that is integrally formed with the gasket body 24. The cylinder head cover 23 is fitted into the portion 26, and the gasket body 24 is compressed by tightening the cylinder head cover 23 with bolts (not shown).

尚、図示例ではガスケット本体24と半円形プラグ25
とが一体に成形されているが、シリンダヘッド22一般
部のフランジ面22aに沿って両者を別体に成形したも
のもある。この場合には、上記ガスケット本体24は、
半円形プラグ25との当接部およびその前後のフランジ
面22aとの当接部で同一の断面形状に形成されている
In addition, in the illustrated example, the gasket body 24 and the semicircular plug 25
Although these are integrally molded, there are also models in which both are molded separately along the flange surface 22a of the general portion of the cylinder head 22. In this case, the gasket body 24 is
The contact portion with the semicircular plug 25 and the contact portion with the flange surface 22a before and after the same are formed to have the same cross-sectional shape.

発明が解決しようとする課題 上記のようなシール部材21においては、シリンダヘッ
ドカバー23の締付によって第7図の矢印のように圧縮
力を受けるが、これに伴って半円形プラグ25の角部2
5aが内周側へ引っ張られるように変形する、という不
具合がある。すなわち、この角部25aと切欠部26内
周面との間のシール性が低下し易く、ここから内部の潤
滑油かにじみ出てくる虞れがあった。尚、この問題は、
半円形プラグ25をガスケット本体24と別体に構成し
た場合でも全く同様に生じる。
Problems to be Solved by the Invention In the sealing member 21 as described above, when the cylinder head cover 23 is tightened, compressive force is applied as shown by the arrow in FIG.
There is a problem that 5a is deformed as if being pulled toward the inner circumference. That is, the sealing performance between the corner portion 25a and the inner circumferential surface of the cutout portion 26 is likely to deteriorate, and there is a possibility that the lubricating oil inside may ooze out from the corner portion 25a. Furthermore, this problem is
Even when the semicircular plug 25 is configured separately from the gasket body 24, the same problem occurs.

課題を解決するための手段 そこで、この発明は、シリンダヘッドとシリンダヘッド
カバーとの間に介装される枠状をなすガスケット本体と
、このガスケット本体と一体もしくは別体に形成され、
かつシリンダヘッド壁部の半円形切欠部に装着される半
円形プラグとからなるシリンダヘッドカバー用シール部
材において、上記半円形プラグの半円中心部から該プラ
グの角部近傍へ向かって斜めに延びたリブを設けたこと
を特徴としている。
Means for Solving the Problems Therefore, the present invention provides a frame-shaped gasket body interposed between a cylinder head and a cylinder head cover, and a frame-shaped gasket body formed integrally with or separately from the gasket body,
and a semicircular plug attached to a semicircular notch in a cylinder head wall, the cylinder head cover having a sealing member extending diagonally from the semicircular center of the semicircular plug toward the vicinity of a corner of the plug. It is characterized by having ribs.

作用 上記構成ではガスケット本体から半円形プラグに圧縮力
が伝わると、半円形プラグ角部近傍が上記リブを介して
半径方向外周側へ強く押圧される。
Effect In the above configuration, when compressive force is transmitted from the gasket body to the semicircular plug, the vicinity of the corner of the semicircular plug is strongly pressed toward the outer circumferential side in the radial direction via the rib.

これにより、半円形プラグ角部での面圧低下が抑制され
る。
This suppresses a decrease in surface pressure at the corners of the semicircular plug.

実施例 以下、この発明の一実施例を図面に基づいて詳細に説明
する。第1図〜第4図は、この発明に係るシリンダヘッ
ドカバー用シール部材lの一実施例を示している。
EXAMPLE Hereinafter, an example of the present invention will be described in detail based on the drawings. 1 to 4 show an embodiment of a cylinder head cover seal member l according to the present invention.

このシール部材lは、ゴム等の弾性体からなり、シリン
ダヘッド2とシリンダヘッドカバー3との7間に介装さ
れる枠状に連続したガスケット本体4と、シリンダヘッ
ド2壁部の半円形切欠部5(第4図参照)に装着される
半円形プラグ6とが一体に成形されている。
This sealing member l is made of an elastic body such as rubber, and includes a continuous frame-shaped gasket body 4 interposed between the cylinder head 2 and the cylinder head cover 3, and a semicircular notch in the wall of the cylinder head 2. 5 (see FIG. 4) and a semicircular plug 6 attached thereto are integrally molded.

上記半円形プラグ6は、上記切欠部5に略等しい径の半
円形をなし、かつその半円筒面6aの両側部から外周側
に延設されたフランジ部7によって、第3,4図に示す
ように上記切欠部5に比較的密に嵌合するようになって
いる。尚、上記半円筒面6aには、切欠部5内周面との
間のシール性を高めるために突条をなす一対のシール突
起8が形成されている。また上記半円形プラグ6の両側
面においては、外周部が半円形に厚肉部9となっており
、内周側部分が相対的に凹んだ形となっている。そして
、ここを部分的に厚肉に膨出させることで両面にそれぞ
れ一対のリブ10が形成されている。上記リブ10は、
第1,4図に示すように、半円の中心部から該半円形プ
ラグ6の角部6b近傍へ向かって斜めに直線状に延びて
おり、かつ左右対称に形成されている。尚、第1図〜第
4図の実施例では、一対のリブ10が半円中心部で互い
に連続しているが、第5図に示すように、それぞれ分離
独立した形状に形成しても良い。
The semicircular plug 6 has a semicircular shape with a diameter approximately equal to that of the notch 5, and has flange portions 7 extending from both sides of the semicylindrical surface 6a toward the outer circumference, as shown in FIGS. 3 and 4. It is designed to fit relatively tightly into the notch 5 as shown in FIG. A pair of seal protrusions 8 are formed on the semi-cylindrical surface 6a to improve sealing performance with the inner circumferential surface of the notch 5. Further, on both sides of the semicircular plug 6, the outer peripheral portion is a semicircular thick portion 9, and the inner peripheral portion is relatively concave. A pair of ribs 10 are formed on both surfaces by partially expanding the thickness. The rib 10 is
As shown in FIGS. 1 and 4, it extends obliquely in a straight line from the center of the semicircle toward the vicinity of the corner 6b of the semicircular plug 6, and is formed symmetrically. In the embodiments shown in FIGS. 1 to 4, the pair of ribs 10 are continuous with each other at the center of the semicircle, but as shown in FIG. 5, they may be formed into separate and independent shapes. .

一方、ガスケット本体4は、第3図に示すように所謂砲
弾型の断面を有するもので、半円形プラグ6との接続部
を除き略同−断面形状をなし、かつシリンダヘッドカバ
ー3周縁のレール部3aに形成したガスケット保持溝1
1内に嵌合保持されている。また、上記半円形プラグ6
が位置する部分では、第2.3図に示すように、該半円
形プラグ6上面にガスケット本体4先端が連続した断面
形状に一体成形されている。
On the other hand, the gasket body 4 has a so-called bullet-shaped cross section as shown in FIG. Gasket holding groove 1 formed in 3a
1 and is held in place. In addition, the above semicircular plug 6
As shown in FIG. 2.3, the tip of the gasket body 4 is integrally molded on the upper surface of the semicircular plug 6 to have a continuous cross-sectional shape.

第4図は、上記のように構成されたシール部材1をシリ
ンダヘッド2とシリンダヘッドカバー3との間に装着し
、かつシリンダへラドカバ−3を図示せぬボルトによっ
て締め付けたシール状態を示している。
FIG. 4 shows a sealed state in which the seal member 1 configured as described above is installed between the cylinder head 2 and the cylinder head cover 3, and the rad cover 3 is tightened to the cylinder with bolts (not shown). .

このようにガスケット本体4がシリンダヘッドカバー3
によって圧縮された状態では、その圧縮力が該ガスケッ
ト本体4を介して半円形プラグ6上面に伝達され、この
半円形プラグ6を変形させようとする。ここで上記構成
では、半円形プラグ6の半円中心部に加わった力が第4
図の矢印に示すように、直線状に延びたリブ10を介し
て角部6b近傍へ向けて斜め方向に伝達される。そのた
め、角部6b部分が半径方向外周側へ強く押圧される。
In this way, the gasket body 4 is attached to the cylinder head cover 3.
In the compressed state, the compressive force is transmitted to the upper surface of the semicircular plug 6 through the gasket body 4, and tends to deform the semicircular plug 6. In the above configuration, the force applied to the semicircular center of the semicircular plug 6 is the fourth
As shown by the arrow in the figure, the energy is transmitted obliquely toward the vicinity of the corner 6b via the linearly extending rib 10. Therefore, the corner portion 6b portion is strongly pressed toward the outer peripheral side in the radial direction.

また同時に、半円形プラグ6中央部における上下方向の
撓み量が小さくなり、角部6bを内周側へ引っ張ろうと
する力がそれだけ弱められる。
At the same time, the amount of deflection in the vertical direction at the center of the semicircular plug 6 is reduced, and the force that tries to pull the corner 6b toward the inner circumference is weakened accordingly.

従って、角部6bにおける面圧を十分に確保することが
でき、シール性の低下が防止される。
Therefore, sufficient surface pressure can be ensured at the corner portion 6b, and deterioration in sealing performance can be prevented.

次に第6図に示す実施例は、リブとして半円形プラグ6
内部に帯状金属板12を埋設したものである。上記帯状
金属板12は緩く湾曲した逆V字形をなし、中央部12
aが半円中心部に位置するとともに、両端部12bがそ
れぞれ半円形プラグ6の角部6b近傍に位置している。
Next, in the embodiment shown in FIG. 6, a semicircular plug 6 is used as a rib.
A band-shaped metal plate 12 is embedded inside. The band-shaped metal plate 12 has a gently curved inverted V shape, and has a central portion 12.
a is located at the center of the semicircle, and both ends 12b are located near the corners 6b of the semicircular plug 6, respectively.

そして、特にこの実施例では、上記帯状金属板12が適
宜なばね性を有する金属にて形成されている。
Particularly in this embodiment, the band-shaped metal plate 12 is made of a metal having appropriate spring properties.

この実施例においては、前述した実施例と同様に、半円
中心部に加えられた押圧力が上記帯状金属板I2を介し
て角部6b近傍に伝達され、角部6bを半径方向外周側
へ押圧することができる。
In this embodiment, similarly to the embodiment described above, the pressing force applied to the center of the semicircle is transmitted to the vicinity of the corner 6b via the band-shaped metal plate I2, and the corner 6b is moved toward the outer circumferential side in the radial direction. Can be pressed.

特に、上記のように帯状金属板12にばね性を付与して
あれば、第6図に矢印で示すように、中央部12aが下
方に押圧された際に、両端部12bがばね反力によって
上方へ向かおうとするので、半円形プラグ6の角部6b
を斜め上方へ押圧することができ、該角部6bにおける
シール性低下を一層確実に防止できる。
In particular, if the band-shaped metal plate 12 is given spring properties as described above, when the center part 12a is pressed downward, both ends 12b will be affected by the spring reaction force, as shown by the arrow in FIG. As it tries to go upward, the corner 6b of the semicircular plug 6
can be pressed diagonally upward, and it is possible to more reliably prevent the sealing performance from deteriorating at the corner 6b.

尚、上記各実施例では、半円形プラグ6をガスケット本
体4と一体に成形した例を説明したが、この発明はこれ
に限られず、両者を別体に構成したものにおいても同様
に適用することが可能である。
In each of the above embodiments, the semicircular plug 6 is molded integrally with the gasket body 4, but the present invention is not limited to this, and can be similarly applied to structures in which both are formed separately. is possible.

発明の効果 以上の説明で明らかなように、この発明に係るシリンダ
ヘッドカバー用シール部材によれば、半円形プラグの半
円中心部から該プラグの角部近傍へ向かって斜めに延び
たリブを設けたので、半円形プラグ角部の面圧を十分に
高く確保でき、潤滑油の滲み等を確実に防止できる。
Effects of the Invention As is clear from the above explanation, according to the sealing member for a cylinder head cover according to the present invention, a rib is provided that extends diagonally from the semicircular center of the semicircular plug toward the vicinity of the corner of the plug. Therefore, it is possible to ensure a sufficiently high surface pressure at the corner of the semicircular plug, and it is possible to reliably prevent lubricant oil from seeping.

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

第1図はこの発明に係るシール部材の一実施例を示す斜
視図、第2図はその■−■線に沿った断面図、第3図は
同じ<m−m線に沿った断面図、第4図はこのシール部
材をシリンダヘッドとシリンダヘッドカバーとの間に装
着した状態で示す要部正面図、第5図はこの発明に係る
シール部材の異なる実施例を示す要部正面図、第6図は
この発明に係るシール部材の更に異なる実施例を示す断
面図、第7図は従来のシール部材の一例を示す断面図で
ある。 l・・・シール部材、4・・・ガスケット本体、6・・
・半円形プラグ、IO・・・リブ。 第1図 第4図 第5図
FIG. 1 is a perspective view showing an embodiment of the sealing member according to the present invention, FIG. 2 is a sectional view taken along the line ■-■, FIG. 3 is a sectional view taken along the same <m-m line, FIG. 4 is a front view of the main parts showing this seal member installed between the cylinder head and the cylinder head cover, FIG. 5 is a front view of the main parts showing different embodiments of the seal member according to the present invention, and FIG. The figure is a cross-sectional view showing still another embodiment of the sealing member according to the present invention, and FIG. 7 is a cross-sectional view showing an example of a conventional sealing member. l... Seal member, 4... Gasket body, 6...
・Semi-circular plug, IO...rib. Figure 1 Figure 4 Figure 5

Claims (1)

【特許請求の範囲】[Claims] (1)シリンダヘッドとシリンダヘッドカバーとの間に
介装される枠状をなすガスケット本体と、このガスケッ
ト本体と一体もしくは別体に形成され、かつシリンダヘ
ッド壁部の半円形切欠部に装着される半円形プラグとか
らなるシリンダヘッドカバー用シール部材において、上
記半円形プラグの半円中心部から該プラグの角部近傍へ
向かって斜めに延びたリブを設けたことを特徴とするシ
リンダヘッドカバー用シール部材。
(1) A frame-shaped gasket body interposed between the cylinder head and the cylinder head cover, which is formed integrally or separately from the gasket body and is attached to a semicircular notch in the cylinder head wall. A sealing member for a cylinder head cover comprising a semicircular plug, characterized in that a rib is provided that extends obliquely from the semicircular center of the semicircular plug toward the vicinity of a corner of the plug. .
JP7450689A 1989-03-27 1989-03-27 Sealing member for cylinder head cover Pending JPH02252948A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7450689A JPH02252948A (en) 1989-03-27 1989-03-27 Sealing member for cylinder head cover

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7450689A JPH02252948A (en) 1989-03-27 1989-03-27 Sealing member for cylinder head cover

Publications (1)

Publication Number Publication Date
JPH02252948A true JPH02252948A (en) 1990-10-11

Family

ID=13549277

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7450689A Pending JPH02252948A (en) 1989-03-27 1989-03-27 Sealing member for cylinder head cover

Country Status (1)

Country Link
JP (1) JPH02252948A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010249270A (en) * 2009-04-17 2010-11-04 Nok Corp Sealing structure and gasket
JP2012255515A (en) * 2011-06-10 2012-12-27 Uchiyama Manufacturing Corp Gasket

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010249270A (en) * 2009-04-17 2010-11-04 Nok Corp Sealing structure and gasket
JP2012255515A (en) * 2011-06-10 2012-12-27 Uchiyama Manufacturing Corp Gasket

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