JPH0118824Y2

JPH0118824Y2 -

Info

Publication number: JPH0118824Y2
Application number: JP1983053529U
Authority: JP
Priority date: 1983-04-11
Filing date: 1983-04-11
Publication date: 1989-06-01
Also published as: JPS59159759U

Description

【考案の詳細な説明】〔考案の目的〕（産業上の利用分野）この考案は、組付け性の向上を図つたエンジン
のシリンダヘツドガスケツトに関する。[Detailed Description of the Invention] [Purpose of the Invention] (Field of Industrial Application) This invention relates to a cylinder head gasket for an engine that is designed to improve ease of assembly.

（従来の技術および考案が解決しようとする課
題）エンジンでは、シリンダヘツドにヘツドカバー
を重ねて締着するとき、その間にガスケツトを挟
んで密閉を保つようにしている。一般に、このよ
うな場合、ガスケツトは、重ね合せるシリンダヘ
ツドの端面の形状に合せて作られている。ところ
が、シリンダヘツドは、長方形であるが、吸排気
弁を取付ける関係で、数個所側方へ突出する弓状
湾曲部が設けられている。ガスケツトをこの形状
に合せると、変形し易く、シリンダヘツド端面に
合せるのに手間がかかり、シール巾が一定せず、
シールが不十分なことがある。又、合せるのに時
間がかかつて組付けに手間がかかる不都合もあ
る。(Problems to be Solved by Prior Art and Ideas) In an engine, when a head cover is stacked and fastened to a cylinder head, a gasket is sandwiched between the covers to maintain a tight seal. Generally, in such cases, the gasket is made to match the shape of the end faces of the overlapping cylinder heads. However, although the cylinder head is rectangular, it is provided with several arcuate curved portions that protrude laterally in order to mount the intake and exhaust valves. If the gasket is fitted to this shape, it will easily deform, it will take time to fit it to the end face of the cylinder head, and the seal width will not be constant.
Seal may be insufficient. In addition, there are also disadvantages in that it takes time to match and it takes time and effort to assemble.

この考案は、かかる点に鑑み、組付性シール性
共に向上するように改善したものである。 In view of this point, this invention has been improved to improve both assembly and sealing performance.

[Structure of the idea]

（課題を解決するための手段）本考案は、一部側方への弓状湾曲部を有する長
方形の端面のシリンダヘツドに於て、該端面に重
ねるガスケツトの外周部をシリンダヘツド端面の
外周部に合せた形状にすると共に、ガスケツトの
内周部を前記弓状湾曲部に突出し、シリンダヘツ
ドの端面内周に合せた形状にしたものである。 (Means for Solving the Problems) The present invention provides a cylinder head having a rectangular end face having a part of a sideward arcuate curve, in which the outer periphery of a gasket that overlaps the end face is attached to the outer periphery of the cylinder head end face. The gasket is shaped to match the inner periphery of the end face of the cylinder head, with the inner periphery of the gasket protruding into the arcuate curved portion.

（作用）弓状湾曲部を有するシリンダヘツドに装着する
ガスケツトの外周部をシリンダヘツドの外周部に
合せ、又、その内周部を前記弓状湾曲部に突出
し、シリンダヘツドの端面内周部に合せ、シリン
ダヘツド端面に曲部なく位置させる。(Function) The outer periphery of the gasket attached to the cylinder head having an arcuate curved portion is aligned with the outer periphery of the cylinder head, and the inner periphery of the gasket is projected into the arcuate curved portion, and the gasket is attached to the inner periphery of the end face of the cylinder head. Align and position it on the end face of the cylinder head without any curved parts.

〔Example〕

以下本考案を図面に示す実施例について説明す
る。 Embodiments of the present invention shown in the drawings will be described below.

シリンダヘツド１の上端面は、基本形状が長方
形であるが、吸排気弁を取付ける個所では、バル
ブスプリング等の抜取りの関係で、弁の取付け個
所に合せて、弓状湾曲部２が設けられている。シ
リンダヘツド１の上端面には、ガスケツト３を挟
んでヘツドカバー４を重ねて締着する。ところで
ガスケツト３はその外周部を弓状湾曲部２を有す
るシリンダヘツド１の上端面外周部の形状に合せ
る。そして、ガスケツト３の内周部は、シリンダ
ヘツド１の内周部の弓状湾曲部に突出しシリンダ
ヘツドの内壁面に合せた形状とする。即ち、ガス
ケツト３は、シリンダヘツド１の弓状湾曲部２に
於ては、弓状湾曲部２の張出し分だけ巾が広くし
てある。５はヘツドカバー４を合せるための突起
である。 The upper end surface of the cylinder head 1 has a basic rectangular shape, but an arcuate curved portion 2 is provided at the location where the intake and exhaust valves are installed in order to remove valve springs, etc. There is. A head cover 4 is overlaid and fastened to the upper end surface of the cylinder head 1 with a gasket 3 in between. By the way, the outer periphery of the gasket 3 matches the shape of the outer periphery of the upper end surface of the cylinder head 1 having the arcuate curved portion 2. The inner circumferential portion of the gasket 3 is shaped to protrude from the arcuate curved portion of the inner circumferential portion of the cylinder head 1 and match the inner wall surface of the cylinder head. That is, the gasket 3 is made wider at the arcuate curved portion 2 of the cylinder head 1 by the amount by which the arcuate curved portion 2 extends. 5 is a projection for fitting the head cover 4.

しかして、シリンダヘツド１の上端面に、ガス
ケツト３を重ね、更にヘツドカバー４を重ねて締
着するが、ガスケツト３を重ねるとき、ガスケツ
ト３の内周は長方形で、シリンダヘツド１の端面
内周に合せ易い。シリンダヘツド１の弓状湾曲部
２に於ては、ガスケツト３が巾広にできているの
で、ガスケツト３の変形が少く、位置合せが簡単
で、確実に合せられるので、シール性もよくな
る。 Thus, the gasket 3 is stacked on the upper end surface of the cylinder head 1, and the head cover 4 is further stacked and tightened. Easy to match. Since the gasket 3 is made wide in the arcuate curved portion 2 of the cylinder head 1, deformation of the gasket 3 is small, and alignment is easy and reliable, resulting in good sealing performance.

〔考案の効果〕以上説明したように、この考案は、一部側方へ
の弓状湾曲部を有する長方形の端面のシリンダヘ
ツドに於て、該端面に重ねるガスケツトの外周部
をシリンダヘツド端面の外周部に合せた形状にす
ると共に、ガスケツトの内周部を弓状湾曲部に突
出するシリンダヘツドの端面内周部に合せた形状
にして、弓状湾曲部に於ては、ガスケツトを弓状
湾曲部だけ巾広にしたので、ガスケツトの曲り部
分がなく、腰が強くできて、ガスケツトの変形を
防げ、位置合せが簡単にできて組付け性が向上す
る。又、位置合せが確実にできるので、シール性
も向上する。[Effects of the invention] As explained above, this invention, in a cylinder head having a rectangular end face having a part of a sideward arcuate curve, allows the outer periphery of the gasket that overlaps the end face to be placed on the end face of the cylinder head. The gasket is shaped to match the outer periphery, and the inner periphery of the gasket is shaped to match the inner periphery of the end face of the cylinder head that protrudes into the arcuate curved part. Since only the curved part is widened, there is no curved part of the gasket, making it strong, preventing deformation of the gasket, and making positioning easier and improving ease of assembly. Furthermore, since positioning can be ensured, sealing performance is also improved.

[Brief explanation of the drawing]

図は本考案の一実施例を示し、第１図は平面
図、第２図は第１図Ａ−Ａ矢視拡大断面図、第３
図は第１図Ｂ−Ｂ矢視拡大断面図である。１……シリンダヘツド、２……弓状湾曲部、３
……ガスケツト。 The figures show one embodiment of the present invention, in which Fig. 1 is a plan view, Fig. 2 is an enlarged sectional view taken along the line A-A in Fig. 1, and Fig. 3
The figure is an enlarged sectional view taken along the line B-B in FIG. 1... Cylinder head, 2... Arcuate curved part, 3
...Gasket.

Claims

[Scope of utility model registration request]

In a cylinder head having a rectangular end face with a part of the end face arched to the side, the outer circumference of the gasket that overlaps the end face is shaped to match the outer circumference of the end face of the cylinder head, and the inner circumference of the gasket is shaped to match the outer circumference of the end face of the cylinder head. A cylinder head gasket for an engine, characterized in that the gasket protrudes from the arcuate curved portion and has a shape that matches the inner periphery of the end face of the cylinder head.