JPH0437206Y2 - - Google Patents
Info
- Publication number
- JPH0437206Y2 JPH0437206Y2 JP1988061968U JP6196888U JPH0437206Y2 JP H0437206 Y2 JPH0437206 Y2 JP H0437206Y2 JP 1988061968 U JP1988061968 U JP 1988061968U JP 6196888 U JP6196888 U JP 6196888U JP H0437206 Y2 JPH0437206 Y2 JP H0437206Y2
- Authority
- JP
- Japan
- Prior art keywords
- metal reinforcing
- reinforcing ring
- valve stem
- rubber seal
- protrusions
- 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
- 239000002184 metal Substances 0.000 claims description 32
- 230000003014 reinforcing effect Effects 0.000 claims description 31
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000007789 sealing Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000002313 adhesive film Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、主として内燃機関の吸・排気弁等に
用いられるバルブステムシールに関するものであ
る。[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a valve stem seal used mainly in intake and exhaust valves of internal combustion engines.
従来この種のバルブステムシールとしては、例
えば第４図のようなものがあつた。即ち、第４図
は従来のバルブステムシールの縦断面図であり、
平ワツシヤ形状の金属製補強環２とゴム製シール
本体１を一体成型し、スプリング３を装着し構成
されていた。
Conventionally, this type of valve stem seal has been known, for example, as shown in FIG. That is, FIG. 4 is a longitudinal cross-sectional view of a conventional valve stem seal.
It was constructed by integrally molding a flat washer-shaped metal reinforcing ring 2 and a rubber seal body 1, and mounting a spring 3.
しかしながらこのような従来のバルブステムシ
ールにあつては、製造時に金属製補強環２どうし
の密着が脱脂工程・接着剤塗布工程で発生するこ
とにより金属製補強環２全体にわたり均一に脱脂
して接着剤塗布することが不能となることで金属
製補強環２とゴム製シール本体１の接着強度が低
下したり、使用時の熱によつて発生するゴム製シ
ール本体１の熱膨張ストレスがゴム製シール本体
１と金属製補強環２の境界部に集中して金属製補
強環２からゴム製シール本体１の剥離を促進する
ことで、リツプ４内径拡大やゆがみを抑止してい
る金属製補強環２とゴム製シール本体１の接着強
度を低下させ密封性に影響するという問題があつ
た。
However, in the case of such conventional valve stem seals, the metal reinforcing rings 2 come into close contact with each other during the degreasing process and adhesive application process during manufacturing, so the entire metal reinforcing rings 2 are not evenly degreased and bonded. The adhesive strength between the metal reinforcing ring 2 and the rubber seal body 1 may decrease due to the inability to apply the agent, and the thermal expansion stress of the rubber seal body 1 caused by heat during use may The metal reinforcing ring prevents the inner diameter of the lip 4 from expanding or distorting by promoting the peeling of the rubber seal body 1 from the metal reinforcing ring 2 in a concentrated manner at the boundary between the seal body 1 and the metal reinforcing ring 2. There was a problem in that the adhesive strength between the rubber seal body 1 and the rubber seal body 1 was reduced, which affected the sealing performance.
本考案は、上記事情のもとになされたもので、
その目的とするところは、ゴム製シール本体１と
金属製補強環２の接着強度を向上させたバルブス
テムシールを提供することにある。
This invention was made under the above circumstances,
The purpose is to provide a valve stem seal in which the adhesive strength between the rubber seal body 1 and the metal reinforcing ring 2 is improved.
上記目的を達成するために本考案は、バルブス
テムシールへ平ワツシヤ形状の金属製補強環２に
かわり突起を設けた金属製補強環２′をゴム製シ
ール本体１と一体成型したことを特徴とする。
In order to achieve the above object, the present invention is characterized in that instead of the flat washer-shaped metal reinforcing ring 2 on the valve stem seal, a metal reinforcing ring 2' having a protrusion is integrally molded with the rubber seal body 1. do.
上記構成によれば、製作時突起を設けた金属製
補強環２′どうしの密着防止を図ることができ、
突起を設けた金属製補強環２′に均一で安定した
接着剤の塗布膜を形成することにより、接着強度
を向上し、ゴム製シール本体１と突起を設けた金
属製補強環２′の剥離をなくしバルブステムシー
ルの長期にわたる安定した密封性能を維持するこ
とができる。
According to the above configuration, it is possible to prevent the metal reinforcing rings 2' provided with protrusions from coming into close contact with each other during manufacturing,
By forming a uniform and stable coating film of adhesive on the metal reinforcing ring 2' provided with protrusions, the adhesive strength is improved and the peeling of the rubber seal body 1 and the metal reinforcing ring 2' provided with protrusions is facilitated. It is possible to maintain stable sealing performance of the valve stem seal over a long period of time.
又、突起を設けた金属製補強環２′どうしの密
着による不良発生を防ぎ、生産コストを低減する
という経済性が改善できる。 Furthermore, it is possible to prevent the occurrence of defects due to close contact between the metal reinforcing rings 2' provided with protrusions, and to improve economic efficiency by reducing production costs.
以下この考案を図面に示す実施例について説明
すると、本考案のバルブステムシールはシール要
部であるリツプ４を有するゴム製シール本体１に
突起を設けた金属製補強環２′が装着され、スプ
リング３をゴム製シール本体１に装着し構成して
いる点では従来品と同一である。
The present invention will be described below with reference to an embodiment shown in the drawings.The valve stem seal of the present invention has a rubber seal main body 1 having a lip 4, which is the main part of the seal, and a metal reinforcing ring 2' having a protrusion attached thereto. 3 is attached to the rubber seal main body 1, which is the same as the conventional product.
本考案は、かかるバルブステムシールにおい
て、従来の金属製補強環２に対し平面部６に６個
所の小さな突起５を製作時に、具体的にはプレス
加工による板材の打ち抜き工程で同時加工により
形成した突起を設けた金属製補強環２′とゴム製
シール本体１を一体成型することによりゴム製シ
ール本体１に完全に突起を設けた金属製補強環
２′を埋設し突起を設けた金属製補強環２′の大気
側露出部分を消滅させた構成となつている。 In this valve stem seal, the present invention has six small protrusions 5 formed on the flat part 6 of the conventional metal reinforcing ring 2 at the time of manufacturing, specifically, by simultaneous processing in the punching process of the plate material by press working. By integrally molding the metal reinforcing ring 2' with protrusions and the rubber seal body 1, the metal reinforcing ring 2' with protrusions is completely embedded in the rubber seal body 1, resulting in metal reinforcement with protrusions. The structure is such that the exposed part of the ring 2' on the atmosphere side is eliminated.
又、他実施例として第６図に示す如くスプリン
グを使用しないがバルブステムシールにも適用す
ることができる。 Further, as another embodiment, as shown in FIG. 6, the present invention can be applied to a valve stem seal without using a spring.
尚、本考案の突起を設けた金属製補強環２′に
設ける突起５の形状、数、位置等は、前記実施例
に限定されるものではなく、必要に応じて変更す
るとよい。 The shape, number, position, etc. of the protrusions 5 provided on the metal reinforcing ring 2' provided with protrusions of the present invention are not limited to those in the embodiments described above, and may be changed as necessary.
以上の説明で明らかなように、本考案によれ
ば、従来と異なりゴム製シール本体１に突起を設
けた金属製補強環２′が完全に埋設されることに
より、従来の問題点であつたゴム製シール本体１
と金属製補強環２の境界部に生じていた、使用時
の熱によつて発生する応力集中部がなくなり、ゴ
ム製シール本体１と突起を設けた金属製補強環
２′の剥離を長期にわたり防止しバルブステムシ
ールの密封性能を長期間安定させることができる
とともに、ゴム製シール本体１で突起を設けた金
属製補強環２′が被覆されるので防錆効果を向上
させることができる。
As is clear from the above explanation, according to the present invention, the metal reinforcing ring 2' having protrusions is completely buried in the rubber seal body 1, which is different from the conventional method, which solves the problems of the conventional method. Rubber seal body 1
The stress concentration area caused by the heat during use, which was generated at the boundary between the rubber seal body 1 and the metal reinforcing ring 2, is eliminated, and the peeling of the rubber seal body 1 and the metal reinforcing ring 2' with protrusions is prevented for a long time. The sealing performance of the valve stem seal can be stabilized for a long period of time, and the metal reinforcing ring 2' provided with the protrusion is covered with the rubber seal body 1, so that the rust prevention effect can be improved.
又、本考案により、突起を設けた金属製補強環
２′では従来の如き製造時の密着がないので、突
起を設けた金属製補強環２′の均一な脱脂や接着
剤塗布膜を形成することができバルブステムシー
ルの密封信頼性及び経済性の改善を向上させるこ
とができる。 Furthermore, according to the present invention, since the metal reinforcing ring 2' provided with protrusions does not have close contact during manufacturing as in the conventional case, it is possible to uniformly degrease or apply an adhesive film on the metal reinforcing ring 2' provided with protrusions. It can improve the sealing reliability and economic efficiency of the valve stem seal.
尚、本考案により、ゴム製シール本体１と突起
を設けた金属製補強環２′を一体化する成型時に
図示されていない金型と突起を設けた金属製補強
環２′との接触面積が従来に比べ減少し、金型へ
の汚染防止効果を向上させるという優れた効果を
奏するものである。 In addition, according to the present invention, when molding the rubber seal body 1 and the metal reinforcing ring 2' provided with protrusions, the contact area between the mold (not shown) and the metal reinforcing ring 2' provided with protrusions is reduced. This has the excellent effect of improving the effect of preventing contamination of the mold by reducing the amount compared to the conventional method.
第１図は本考案による一実施例を示すバルブス
テムシールの縦半断面図、第２図及び第３図は本
考案による一実施例を示す突起を設けた金属製補
強環の平面図及び縦半断側面図、第４図は従来技
術によるバルブステムシールの縦半断面図、第５
図は従来技術による金属製補強環の斜視図、第６
図は本考案による他実施例を示すバルブステムシ
ールの縦半断面図である。
１……ゴム製シール本体、２……金属製補強
環、２′……突起を設けた金属製補強環、３……
スプリング、４……リツプ、５……突起、６……
平面部。
FIG. 1 is a vertical half-sectional view of a valve stem seal showing an embodiment of the present invention, and FIGS. FIG. 4 is a half-sectional side view, and FIG. 5 is a vertical half-sectional view of a valve stem seal according to the prior art.
The figure is a perspective view of a metal reinforcing ring according to the prior art.
The figure is a vertical half-sectional view of a valve stem seal showing another embodiment of the present invention. 1... Rubber seal body, 2... Metal reinforcing ring, 2'... Metal reinforcing ring provided with projections, 3...
Spring, 4...Lip, 5...Protrusion, 6...
Plane part.
Claims (1)
向の往復運動をなすバルブステムシールにおい
て、平ワツシヤ形状の金属製補強環に突起を少な
くとも一箇所以上設けゴム製シール本体に埋設し
てなることを特徴としたバルブステムシール。 A valve stem seal that penetrates a valve guide and makes axial reciprocating motion through the valve guide is characterized in that a flat washer-shaped metal reinforcing ring is provided with at least one protrusion and embedded in the rubber seal body. Valve stem seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988061968U JPH0437206Y2 (en) | 1988-05-12 | 1988-05-12 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988061968U JPH0437206Y2 (en) | 1988-05-12 | 1988-05-12 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01166706U JPH01166706U (en) | 1989-11-22 |
| JPH0437206Y2 true JPH0437206Y2 (en) | 1992-09-02 |
Family
ID=31287604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988061968U Expired JPH0437206Y2 (en) | 1988-05-12 | 1988-05-12 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0437206Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0721844Y2 (en) * | 1990-12-25 | 1995-05-17 | 内山工業株式会社 | Valve stem seal |
-
1988
- 1988-05-12 JP JP1988061968U patent/JPH0437206Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01166706U (en) | 1989-11-22 |
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