JPH0649974Y2 - Oil seal - Google Patents
Oil sealInfo
- Publication number
- JPH0649974Y2 JPH0649974Y2 JP1989050661U JP5066189U JPH0649974Y2 JP H0649974 Y2 JPH0649974 Y2 JP H0649974Y2 JP 1989050661 U JP1989050661 U JP 1989050661U JP 5066189 U JP5066189 U JP 5066189U JP H0649974 Y2 JPH0649974 Y2 JP H0649974Y2
- Authority
- JP
- Japan
- Prior art keywords
- backup
- cylindrical portion
- attached
- reinforcing ring
- backup sheet
- 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
- 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、互いに同心に組合わされたシャフト及びハウ
ジングの間に配置されて両部材間の隙間を密封するオイ
ルシールに関し、更に詳しくは、密封対象流体の高圧力
に耐え得るオイルシールの構造を提示するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to an oil seal disposed between a shaft and a housing which are concentrically combined with each other to seal a gap between both members, and more specifically, to an oil seal. The structure of an oil seal capable of withstanding the high pressure of the target fluid is presented.
（従来の技術） 互いに同心に組合わされたシャフト及びハウジングの間
に配置されて両部材間の隙間を密封するオイルシール
で、特に密封対象流体の圧力が高い場合に、一例を第３
図に示すようなオイルシールが多く使用されている。(Prior Art) An oil seal that is disposed between a shaft and a housing that are concentrically combined with each other and seals a gap between both members. Particularly, when the pressure of a fluid to be sealed is high, a third example is provided.
Oil seals as shown in the figure are often used.
同図のオイルシールは、金属板材をもって製せられ、円
筒部２、径方向部３及びバックアップ部４を有して略Ｌ
字状の断面形状を呈する補強環１と、弗素樹脂材料やナ
イロン樹脂材料のような耐圧性を備えた弾性材料をもっ
て製せられ、径方向部３及びバックアップ部４に非接着
状態で添えられたバックアップシート５と、ゴム状弾性
材料をもって成形され、補強環１の円筒部２の内周面に
接着され、バックアップシート５に対し、非接着状態で
添えられたシール部材６とを有し、ゴム状弾性材を被覆
された円筒部２をハウジング７に取り付けられてシール
部材６をシャフト８の周面に密封摺動させ、密封対象流
体の圧力が高くない間には、シール部材６の弾性変形に
よってシャフト８の偏心に順応し、流体の圧力が上昇し
た場合には、密封対象流体の圧力によりシャフト８の周
面に押圧されるシール部材６の内周面をバックアップシ
ート５に支えさせる。The oil seal shown in the figure is made of a metal plate material, has a cylindrical portion 2, a radial portion 3 and a backup portion 4, and is substantially L-shaped.
It was made of a reinforcing ring 1 having a V-shaped cross section and an elastic material having a pressure resistance such as a fluororesin material or a nylon resin material, and was attached to the radial portion 3 and the backup portion 4 in a non-adhesive state. A backup sheet 5 and a sealing member 6 formed of a rubber-like elastic material and adhered to the inner peripheral surface of the cylindrical portion 2 of the reinforcing ring 1 and attached to the backup sheet 5 in a non-adhesive state are provided. The cylindrical portion 2 coated with the elastic material is attached to the housing 7, and the seal member 6 is slidably slid on the peripheral surface of the shaft 8. While the pressure of the fluid to be sealed is not high, the seal member 6 is elastically deformed. When the pressure of the fluid increases due to the eccentricity of the shaft 8, the backup sheet 5 supports the inner peripheral surface of the seal member 6 pressed against the peripheral surface of the shaft 8 by the pressure of the fluid to be sealed. .
（考案が解決しようとする問題点） 上記した従来の技術によるオイルシールにおいては、製
作時に、バックアップシート５が、補強環１及びシール
部材６に対する同心性および相対姿勢に狂いを生じて十
分な密封性能を保持し得なくなるおそれがあった。(Problems to be Solved by the Invention) In the above-described conventional oil seal, during production, the backup sheet 5 has a concentricity with respect to the reinforcing ring 1 and the seal member 6 and a relative posture, and thus has a sufficient seal. There was a possibility that the performance could not be maintained.
すなわち、バックアップシート５の成形及び補強環１に
対する組合せ並びにシール部材６の成形及び補強環１に
対する接着は、第４図に示すように、予め曲げ加工され
た補強環１を成形型のキャビティ内に収め、打ち抜きさ
れたバックアップシート用素材５′及びリング状のシー
ル部材用素材６′を重ね、加熱しながら加圧して成形す
るのであるが、バックアップシート用素材５′の姿勢
が、成形工程中を通して不安定に保たれるために、バッ
クアップシート５の内周縁のシール部材６の内周部に対
する相対位置が円周方向に沿って不均一になって密封機
能の低下を惹起する。That is, as shown in FIG. 4, the backup sheet 5 is molded and the reinforcing ring 1 is combined, and the seal member 6 is molded and bonded to the reinforcing ring 1, as shown in FIG. The material 5'for the backup sheet and the material 6'for the ring-shaped sealing member, which have been housed and punched, are stacked and pressed by heating, and the posture of the material 5'for the backup sheet is changed during the molding process. Since it is kept unstable, the relative position of the inner peripheral edge of the backup sheet 5 to the inner peripheral portion of the seal member 6 becomes nonuniform along the circumferential direction, and the sealing function is deteriorated.
（問題点を解決するための手段） 本考案は、上記した従来の技術によるオイルシールにお
ける問題点を考慮して、円筒部、径方向部及びバックア
ップ部を有して略Ｌ字状の断面形状を呈する補強環の径
方向部及びバックアップ部に、樹脂状弾性材をもって製
せられ、補強環の円筒部の内径寸法と略同等の外径寸法
を備えたバックアップシートを非接着状態で添え、略蛇
の目形状を呈し、補強環の円筒部の内径寸法と略同等の
外径寸法を備えた押え板を非接着状態でバックアップシ
ートに添え、ゴム状弾性材料をもって成形されたシール
部材を、補強環の円筒部の内周面及び押え板の側面に接
着させるとともに、バックアップシートに非接着状態で
添えた構成となすものである。(Means for Solving the Problems) The present invention has a substantially L-shaped cross-sectional shape having a cylindrical portion, a radial direction portion and a backup portion in consideration of the above-mentioned problems in the conventional oil seal. In the non-bonded state, a backup sheet made of a resinous elastic material and having an outer diameter substantially equal to the inner diameter of the cylindrical portion of the reinforcing ring is attached to the radial portion and the backup portion of the reinforcing ring. Attach a holding plate that has a serpentine shape and an outer diameter that is approximately equal to the inner diameter of the cylindrical portion of the reinforcing ring to the backup sheet in a non-adhesive state, and seal the sealing member formed of a rubber-like elastic material to the reinforcing ring. The structure is such that it is adhered to the inner peripheral surface of the cylindrical portion and the side surface of the pressing plate, and is attached to the backup sheet in a non-adhered state.
（作用） 上記した構成を備えた本考案によるオイルシールにおい
ては、シール部材の成形に先立って補強環の円筒部に嵌
合された押え板が、バックアップシート用素材を押圧し
て補強環に対するバックアップシート用素材の相対位置
及び相対姿勢を不動な状態に維持する。(Operation) In the oil seal according to the present invention having the above-described structure, the holding plate fitted to the cylindrical portion of the reinforcing ring presses the backup sheet material to back up the reinforcing ring prior to molding the seal member. Maintain the relative position and relative attitude of the seat material in an immovable state.
（実施例） 第１図の実施例においては、補強環１が、ハウジング７
に嵌合される円筒部２、径方向部３及び小径のバックア
ップ部４を有し、弗素樹脂材料をもって製せられたバッ
クアップシート５が、円筒部２に嵌合されて径方向部３
及びバックアップ部４に添えられ、略蛇の目形状を呈し
て円筒部２に嵌合された押え板10が、バックアップシー
ト５に非接着状態で重ねられ、ゴム状弾性材料をもって
成形されたシール部材６が、円筒部２の内周面及び押え
板10の側面に接着されるとともに、バックアップシート
５に非接着状態で添えられてシャフト８の周面に摺動す
るように構成されている。(Embodiment) In the embodiment of FIG. 1, the reinforcing ring 1 is a housing 7.
A backup sheet 5 made of a fluororesin material having a cylindrical portion 2, a radial portion 3 and a small-diameter backup portion 4 which are fitted into the cylindrical portion 2 is fitted into the radial portion 3
Also, a holding plate 10 attached to the backup portion 4 and having a substantially serpentine shape and fitted into the cylindrical portion 2 is superposed on the backup sheet 5 in a non-adhesive state, and a sealing member 6 formed of a rubber-like elastic material is formed. While being adhered to the inner peripheral surface of the cylindrical portion 2 and the side surface of the pressing plate 10 and attached to the backup sheet 5 in a non-adhered state, it is configured to slide on the peripheral surface of the shaft 8.
第１図の実施例の成形工程は、第２図に示すように、バ
ックアップシート用素材５′及び押え板10が円筒部２に
嵌合され、押え板10に重ねられたシール部材用素材６′
が加熱・加圧されて成形される。In the molding process of the embodiment shown in FIG. 1, as shown in FIG. 2, the backup sheet material 5'and the holding plate 10 are fitted to the cylindrical portion 2 and the sealing member material 6 is laid on the holding plate 10. ′
Is heated and pressed to be molded.
（考案の効果） 本考案によるオイルシールが、上記したように、円筒
部、径方向部及びバックアップ部を有して略Ｌ字状の断
面形状を呈する補強環の径方向部及びバックアップ部
に、樹脂状弾性材をもって製せられ、補強環の円筒部の
内径寸法と略同等の外径寸法を備えたバックアップシー
トを非接着状態で添えられ、略蛇の目形状を呈し、補強
環の円筒部の内径寸法と略同等の外径寸法を備えた押え
板を、バックアップシートの側面に非接着状態で添えら
れ、ゴム状弾性材料をもって成形されたシール部材を、
補強環の円筒部及び押え板の側面に接着されるととも
に、バックアップシートに非接着状態で添えられた構造
を備えていることにより、ゴム状弾性材料によるシール
部材の成形工程中に、補強環の円筒部に嵌合されたバッ
クアップシート用素材が、円筒部に嵌合された押え板に
押圧されて補強環に対する相対位置及び相対姿勢を安定
した状態に保たれるので、従来の技術によるオイルシー
ルにおいて避けられなかったシール部材の内周部に対す
るバックアップシートの内周縁の相対位置の狂いによる
密封機能の低下が完全に抑止される。(Effects of the Invention) As described above, the oil seal according to the present invention has a cylindrical portion, a radial portion, and a backup portion, and a radial portion and a backup portion of a reinforcing ring having a substantially L-shaped cross-section. Made of resin-like elastic material, a backup sheet with an outer diameter approximately equal to the inner diameter of the cylindrical portion of the reinforcing ring is attached in a non-bonded state, and has a substantially serpentine shape, and the inner diameter of the cylindrical portion of the reinforcing ring. A pressing plate having an outer diameter dimension substantially equal to the dimension is attached to the side surface of the backup sheet in a non-adhesive state, and a sealing member molded with a rubber-like elastic material is used.
Since the structure is attached to the cylindrical portion of the reinforcing ring and the side surface of the holding plate and is attached to the backup sheet in a non-adhered state, the reinforcing ring is attached during the molding process of the seal member made of the rubber-like elastic material. The backup sheet material fitted in the cylindrical part is pressed by the holding plate fitted in the cylindrical part to maintain the relative position and relative posture with respect to the reinforcing ring in a stable state. In this case, it is possible to completely prevent the deterioration of the sealing function due to the deviation of the relative position of the inner peripheral edge of the backup sheet with respect to the inner peripheral portion of the seal member.
第１図は、本考案の一実施例の断面図、第２図は、同実
施例の成形工程の状況を示す断面図、第３図は、従来の
技術によるオイルシールの一例の断面図、第４図は、同
例の成形工程の状況を示す断面図である。 １……補強環、２……円筒部、３……径方向部、４……
バックアップ部、５……バックアップシート、６……シ
ール部材、７……ハウジング、８……シャフト、10……
押え板。FIG. 1 is a cross-sectional view of an embodiment of the present invention, FIG. 2 is a cross-sectional view showing the state of the molding process of the same embodiment, and FIG. 3 is a cross-sectional view of an example of a conventional oil seal, FIG. 4 is a cross-sectional view showing the situation of the molding process of the same example. 1 ... Reinforcing ring, 2 ... Cylindrical part, 3 ... Radial part, 4 ...
Backup part, 5 ... Backup sheet, 6 ... Seal member, 7 ... Housing, 8 ... Shaft, 10 ...
Presser plate.
Claims (1)
アップ部（４）を有して略Ｌ字状の断面形状を呈する補
強環（１）と、樹脂状弾性材をもって製せられ、前記円
筒部（２）の内径寸法と略同等の外径寸法を備えて前記
径方向部（３）及びバックアップ部（４）に添えられた
バックアップシート（５）と、略蛇の目形状を呈し、前
記円筒部（２）の内径寸法と略同等の外径寸法を備えて
前記バックアップシート（５）に添えられた押え板（1
0）と、ゴム状弾性材料をもって成形され、前記円筒部
（２）の内周面及び前記押え板（10）の側面に接着され
るとともに、前記バックアップシート（５）に添えられ
たシール部材（６）とを有するオイルシール。1. A reinforcing ring (1) having a substantially L-shaped cross section having a cylindrical portion (2), a radial portion (3) and a backup portion (4) and a resinous elastic material. And a backup sheet (5) attached to the radial portion (3) and the backup portion (4) having an outer diameter dimension substantially equal to the inner diameter dimension of the cylindrical portion (2), and exhibiting a substantially serpentine shape. A holding plate (1) attached to the backup sheet (5) having an outer diameter dimension substantially equal to the inner diameter dimension of the cylindrical portion (2).
0) and a rubber-like elastic material, which are adhered to the inner peripheral surface of the cylindrical portion (2) and the side surface of the pressing plate (10) and are attached to the backup sheet (5) ( 6) An oil seal having and.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989050661U JPH0649974Y2 (en) | 1989-04-28 | 1989-04-28 | Oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989050661U JPH0649974Y2 (en) | 1989-04-28 | 1989-04-28 | Oil seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02141768U JPH02141768U (en) | 1990-11-29 |
| JPH0649974Y2 true JPH0649974Y2 (en) | 1994-12-14 |
Family
ID=31569400
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989050661U Expired - Lifetime JPH0649974Y2 (en) | 1989-04-28 | 1989-04-28 | Oil seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0649974Y2 (en) |
-
1989
- 1989-04-28 JP JP1989050661U patent/JPH0649974Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02141768U (en) | 1990-11-29 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |