JPH0639084Y2 - Cylinder head cover - Google Patents
Cylinder head coverInfo
- Publication number
- JPH0639084Y2 JPH0639084Y2 JP1095588U JP1095588U JPH0639084Y2 JP H0639084 Y2 JPH0639084 Y2 JP H0639084Y2 JP 1095588 U JP1095588 U JP 1095588U JP 1095588 U JP1095588 U JP 1095588U JP H0639084 Y2 JPH0639084 Y2 JP H0639084Y2
- Authority
- JP
- Japan
- Prior art keywords
- collar
- cylinder head
- flange portion
- head cover
- bolt hole
- 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 - Lifetime
Links
Landscapes
- Cylinder Crankcases Of Internal Combustion Engines (AREA)
- Gasket Seals (AREA)
Description
【考案の詳細な説明】 （産業上の利用分野） この考案は内燃機関のシリンダヘッドカバーに関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a cylinder head cover of an internal combustion engine.
（従来の技術） 従来から合成樹脂製のシリンダヘッドカバーが用いられ
ており、その例を第４図に示す。シリンダヘッドカバー
20は下端が開放され、下端周縁にフランジ部21を設けて
ボルト孔22を穿設した合成樹脂製の箱体にボルト孔22に
金属製管状のカラー23を圧入し、フランジ部下面にパッ
キン24を装着したものである。シリンダヘッドカバー20
はボルト25でシリンダヘッド26に締付けられる。カラー
23はフランジ部21の厚さより長くしてあり、ボルト25の
締め過ぎを防ぐストッパである。これによって締め過ぎ
による伝達振動音を減衰させる性能が低下したり、フラ
ンジ部に過度の応力が働いて亀裂を生じたりするのを防
止している。例えば実開昭57-73406号に示されたカラー
もこのような例である。(Prior Art) Conventionally, a cylinder head cover made of synthetic resin has been used, and an example thereof is shown in FIG. Cylinder head cover
20 has a lower end opened, a flange portion 21 is provided at the lower end periphery, and a metal tubular collar 23 is press-fitted into the bolt hole 22 in a box made of synthetic resin in which a bolt hole 22 is formed, and a packing 24 is attached to the lower surface of the flange portion. Is attached. Cylinder head cover 20
Are fastened to the cylinder head 26 with bolts 25. Color
Reference numeral 23 is a stopper that is longer than the thickness of the flange portion 21 and prevents the bolt 25 from being overtightened. This prevents the performance of attenuating the transmitted vibration sound due to over-tightening from being deteriorated and the flange portion from being cracked due to excessive stress. For example, the color shown in Japanese Utility Model Publication No. 57-73406 is such an example.
（考案が解決しようとする課題） 上記カラーをボルト孔に強い圧入をするとボルト孔を拡
張するような強い応力が作用し合成樹脂材料では耐えら
れず亀裂の原因となる。またカラーがシリンダへの振動
音の減衰性能が低下する。そのためカラーはボルト孔に
比較的ゆるい圧入をしてあるので、長期間の使用中には
熱による合成樹脂材料の劣化などで緩みが生じる。シリ
ンダヘッドカバーはエンジンの点検整備のためしばしば
取外されるが、カラーが緩んでいて脱落することがあ
る。これはカムシャフト等を傷付けたり、その下方に落
ちこんで取出しが困難であるという問題がある。(Problems to be solved by the invention) When the collar is strongly pressed into a bolt hole, a strong stress acts to expand the bolt hole and the synthetic resin material cannot withstand the stress and causes a crack. In addition, the color deteriorates the vibration noise damping performance to the cylinder. Therefore, since the collar is press-fitted relatively loosely into the bolt hole, the collar is loosened due to deterioration of the synthetic resin material due to heat during long-term use. The cylinder head cover is often removed for engine maintenance, but the collar may come loose and fall off. This causes a problem that the cam shaft or the like is damaged or falls below the cam shaft and is difficult to take out.
（課題を解決するための手段） この考案のシリンダヘッドカバーはフランジ部のボルト
孔の上部にテーパ部を設けて上方へ開いたものとし、ボ
ルト孔に圧入されるカラーは上部が前記テーパ部よりも
開き角度が小さい傾斜部が設けてある。またカラーの下
端はフランジ部から下方へ突出し、フランジ部下面のパ
ッキンの圧縮前厚さの途中位置にある。(Means for Solving the Problem) In the cylinder head cover of the present invention, a taper portion is provided on the upper portion of the bolt hole of the flange portion and opened upward, and the collar press-fitted into the bolt hole has an upper portion more than the tapered portion. An inclined part with a small opening angle is provided. Further, the lower end of the collar projects downward from the flange portion and is located at an intermediate position of the pre-compression thickness of the packing on the lower surface of the flange portion.
（作用） この考案のシリンダヘッドカバーはパッキンの適宜の圧
縮代の位置でストッパとして働きボルトの締過ぎを防
ぐ。このとき傾斜部がテーパ部と同じまたは大きい開き
角度であると締付けけ力の分力が第３図Ｙのように働き
フランジ部に亀裂を生じしめるような応力が作用する
が、傾斜部の開き角度を小さくしてあるのでこのような
ことはない。カラーとボルト孔との嵌合が緩んでもカラ
ーは傾斜部に係止され下方へ脱落しない。(Operation) The cylinder head cover of the present invention acts as a stopper at an appropriate compression margin position of the packing to prevent overtightening of the bolt. At this time, if the inclined portion has the same opening angle as the taper portion or a larger opening angle, the component force of the tightening force acts as shown in FIG. 3Y and a stress acts to cause cracks in the flange portion. This is not the case because the angle is small. Even if the collar and the bolt hole are loosely fitted, the collar is locked to the inclined portion and does not drop downward.
（実施例） 第１図第２図に実施例を示す。シリンダヘッドカバー１
は合成樹脂製で下端開放の箱形を成し、下端周縁はフラ
ンジ部２を形成している。その下面のパッキン溝にはゴ
ムパッキン３が装着されている。フランジ部２には複数
のボルト孔４が穿設されその上部は上方へ開くテーパ部
５となっている。管状をなし上部に拡開する傾斜部７を
備えたカラー６がボルト孔４に圧入される。傾斜部７は
テーパ部５より拡開角度が小さくされ、図示のように傾
斜部の下端でテーパ部下端に当接し、上方ほどテーパ部
５との隙間が大となる。ボルト孔４は成形時の抜き勾配
があるから上方ほど大径になる傾向がありカラー６は緩
い圧入では主として下部が緊着される。下端８はフラン
ジ部２より下方へ突出し、パッキン３の圧縮代を考慮し
た位置に止められる。ボルト９がカラー６内に挿入され
てシリンダヘッド10に固着される。カラー６の下端８は
シリンダヘッド10に突き当たり、締め過ぎのストッパと
なる。(Example) An example is shown in FIG. 1 and FIG. Cylinder head cover 1
Is made of synthetic resin and has a box shape with an open lower end, and a peripheral edge of the lower end forms a flange portion 2. A rubber packing 3 is attached to the packing groove on the lower surface. Plural bolt holes 4 are bored in the flange portion 2, and the upper portion thereof is a tapered portion 5 that opens upward. A collar 6 having a tubular shape and an inclined portion 7 that expands upward is press-fitted into the bolt hole 4. The angle of expansion of the inclined portion 7 is smaller than that of the tapered portion 5, the lower end of the inclined portion abuts the lower end of the tapered portion as shown in the drawing, and the gap between the inclined portion 7 and the tapered portion 5 becomes larger toward the upper side. Since the bolt hole 4 has a draft at the time of molding, the diameter tends to become larger toward the upper side, and the collar 6 is firmly adhered to the lower portion mainly by loose press-fitting. The lower end 8 projects downward from the flange portion 2 and is stopped at a position in consideration of the compression margin of the packing 3. The bolt 9 is inserted into the collar 6 and fixed to the cylinder head 10. The lower end 8 of the collar 6 hits the cylinder head 10 and serves as a stopper for over tightening.
（考案の効果） この考案のシリンダヘッドはカラーの圧入が緩んでも傾
斜部の係合でカラーを保持するので脱落することがな
く、従ってカムシャフト等に傷を与えたり、脱落したカ
ラーを取り出す困難が生じたりすることがない。そし
て、ボルト長さはパッキンに圧縮代を与えたストッパと
なって緩み過ぎによるパッキンへたりや防振性能の低下
が防止される。また、カラーの傾斜部はフランジのテー
パ部より拡開角度が小さいので、フランジに無理な力が
加わり亀裂を生じさせることもない。(Effect of the Invention) The cylinder head of this invention does not fall off because the collar is held by the engagement of the inclined portion even if the press-fitting of the collar is loose, and therefore it is difficult to damage the camshaft or take out the fallen collar. Does not occur. The bolt length serves as a stopper that gives a compression margin to the packing, and prevents the packing from being loosened and the vibration damping performance from being deteriorated due to excessive loosening. Further, since the angle of expansion of the inclined portion of the collar is smaller than that of the tapered portion of the flange, an unreasonable force is not applied to the flange to cause a crack.
第１図はこの考案の実施例、第２図はその要部を示す
図、第３図はボルト締付け力の状態を示す図、第４図は
従来のシリンダヘッドカバーの図、第５図はその要部の
図である。 ２……フランジ部、３……パッキン ４……ボルト孔、５……テーパ部 ６……カラー、７……傾斜部 ９……ボルトFIG. 1 is an embodiment of the present invention, FIG. 2 is a view showing a main part thereof, FIG. 3 is a view showing a state of bolt tightening force, FIG. 4 is a view of a conventional cylinder head cover, and FIG. FIG. 2 ... Flange part, 3 ... Packing, 4 ... Bolt hole, 5 ... Tapered part, 6 ... Collar, 7 ... Inclined part, 9 ... Bolt
Claims (1)
けた合成樹脂製の箱体の前記フランジ部下面に、弾性材
でなるパッキンが装着され、前記フランジ部には上方に
拡開するテーパ部を上部に設けたボルト孔が穿設され、
該ボルト孔には上部に前記テーパ部より拡開角度の小さ
い傾斜部を有する管状のカラーが圧入され、該カラーの
下端が前記フランジ部下面より低く、パッキンの圧縮前
の下面より高い位置にあるようにしたシリンダヘッドカ
バー。1. A packing made of an elastic material is attached to the lower surface of the flange portion of a synthetic resin box body having a flange portion on the periphery of an open lower end surface, and the flange portion expands upward. A bolt hole with a tapered part on the top is drilled,
A tubular collar having an inclined portion having a smaller expansion angle than the tapered portion is press-fitted into the bolt hole, and the lower end of the collar is lower than the lower surface of the flange portion and higher than the lower surface of the packing before compression. Cylinder head cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1095588U JPH0639084Y2 (en) | 1988-01-29 | 1988-01-29 | Cylinder head cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1095588U JPH0639084Y2 (en) | 1988-01-29 | 1988-01-29 | Cylinder head cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01115862U JPH01115862U (en) | 1989-08-04 |
| JPH0639084Y2 true JPH0639084Y2 (en) | 1994-10-12 |
Family
ID=31219077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1095588U Expired - Lifetime JPH0639084Y2 (en) | 1988-01-29 | 1988-01-29 | Cylinder head cover |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639084Y2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5571991B2 (en) * | 2010-03-30 | 2014-08-13 | 川崎重工業株式会社 | Reamer bolt coupling structure of marine propulsion shaft |
| JP2017194330A (en) * | 2016-04-20 | 2017-10-26 | 日本特殊陶業株式会社 | Gas sensor |
-
1988
- 1988-01-29 JP JP1095588U patent/JPH0639084Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01115862U (en) | 1989-08-04 |
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