JPH0648208Y2 - Oil seal - Google Patents
Oil sealInfo
- Publication number
- JPH0648208Y2 JPH0648208Y2 JP1988099473U JP9947388U JPH0648208Y2 JP H0648208 Y2 JPH0648208 Y2 JP H0648208Y2 JP 1988099473 U JP1988099473 U JP 1988099473U JP 9947388 U JP9947388 U JP 9947388U JP H0648208 Y2 JPH0648208 Y2 JP H0648208Y2
- Authority
- JP
- Japan
- Prior art keywords
- oil seal
- holding member
- fitted
- elastic body
- packing
- 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
- 238000007789 sealing Methods 0.000 claims description 16
- 238000012856 packing Methods 0.000 claims description 12
- 230000002093 peripheral effect Effects 0.000 claims description 9
- 238000003780 insertion Methods 0.000 claims description 7
- 230000037431 insertion Effects 0.000 claims description 7
- 239000013013 elastic material Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000007779 soft material Substances 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］ 本考案は回転部分を密封するオイルシールに関し、具体
的には固定構造に改良を加えたオイルシールに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to an oil seal for sealing a rotating part, and more specifically to an oil seal having an improved fixed structure.
［従来の技術］ 従来、この種の回転部材と固定部材間を密封するオイル
シールはその片方の部材に嵌合固定され装備する密封リ
ップを他方の摺動部材に摺動せしめて密封を図ってお
り、従って嵌合固着部の取り付け精度がその密封リップ
大きく影響を及ぼし設計上の重要なポイント部分となっ
ていた。[Prior Art] Conventionally, an oil seal for sealing between a rotating member and a fixed member of this type is fitted and fixed to one of the members, and an equipped sealing lip is slid on the other sliding member to achieve sealing. Therefore, the mounting accuracy of the fitting and fixing portion has a great influence on the sealing lip, which is an important point in design.
以下、図面を参照しつつ詳述する。Hereinafter, a detailed description will be given with reference to the drawings.
この固定構造としては、単に剛性の強い材料からなる保
持部材１だけを直接嵌合固定せしめるか、あるいは密封
リップ２を形成する弾性体を該固定部ａ間まで延設して
この弾性体部2aを固定させる構造から、近年では、第４
図に示すような保持部材１と弾性体部2aを併設せしめて
両部材で固定を図っている。As the fixing structure, only the holding member 1 made of a highly rigid material is directly fitted and fixed, or an elastic body forming the sealing lip 2 is extended to between the fixing portions a and the elastic body portion 2a is formed. From the structure that fixes the
As shown in the figure, the holding member 1 and the elastic body portion 2a are provided side by side to fix them together.
［考案が解決しようとする課題］ しかしながら、前記の保持部材１を直接嵌合固定する方
法では安定した密封力を確保する為に該保持部材１と固
定部材４の両接触部材の研磨を必要とするから極めてコ
スト高となり装着作業性も悪いものであった。この逆に
弾性体部2aを固定部に単体で用いる方法では軟質材故そ
の部分の密封力は確保できるが嵌合力が弱く取り付け精
度の低いものでしかなかった。[Problems to be Solved by the Invention] However, in the method of directly fitting and fixing the holding member 1, it is necessary to polish both contact members of the holding member 1 and the fixing member 4 in order to secure a stable sealing force. Therefore, the cost is extremely high and the mounting workability is poor. On the contrary, in the method in which the elastic body portion 2a is used alone as the fixing portion, the sealing force of that portion can be secured because it is a soft material, but the fitting force is weak and the mounting accuracy is low.
この両者の欠点を補うために、第４図の様な保持部材１
と弾性体部2aとの両部材を完着させる方法が開発されて
おり、ある程度の効果を発揮していたが、該構造は材料
特性の相違から形状及び寸法設定が難しくまた弾性体の
材料も多くを必要とするなど価格的不利益を免れないも
のであった。In order to make up for these drawbacks of the two, the holding member 1 as shown in FIG.
A method of completely attaching both members of the elastic body portion 2a and the elastic body portion 2a has been developed and exhibited some effects, but the structure is difficult to set in shape and dimensions due to the difference in material characteristics, and the material of the elastic body is also used. It was unavoidable for the price disadvantages such as requiring a lot.
［考案の目的］ 本考案は、このような多くの欠点に鑑みて、成形が極め
て簡単で材料歩留まりに優れしかも取り付け精度の良好
なオイルシールを提供することを目的としている。[Object of the Invention] The present invention has been made in view of such many drawbacks, and an object thereof is to provide an oil seal which is extremely easy to mold, has a high material yield, and has a good mounting accuracy.
［問題点を解決するための手段］ 本考案は、第１図に示すようにハウジングあるいは回転
軸に装着される環状の保持部材１と、弾性体製の密封リ
ップ２とを組み合わせたオイルシールＡであって；前記
保持部材１の固定部ａを、先挿入部が大径で強圧入され
る強接触部a1と後挿入部が小径で弱接触あるいは小間隙
を保つ非接触部a2との段付き筒形状に形成し、該強接触
部a1の周面上の一部から段部a3にまで連なった周面上に
弾性体製のリング状のパッキング３を設けたことを特徴
としている。[Means for Solving Problems] In the present invention, as shown in FIG. 1, an oil seal A in which an annular holding member 1 mounted on a housing or a rotary shaft and a sealing lip 2 made of an elastic body are combined. A step of the fixed portion a of the holding member 1 with a strong contact portion a1 having a large insertion diameter at the front insertion portion and a non-contact portion a2 having a small insertion diameter at the rear insertion portion for maintaining a weak contact or a small gap. It is characterized in that the ring-shaped packing 3 made of an elastic body is provided on the peripheral surface extending from a part of the peripheral surface of the strong contact portion a1 to the stepped portion a3.
［作用］ 本考案は上記のような構造によって嵌合性とシール性さ
らには圧入工作などが飛躍的に高められたオイルシール
となったものです。[Operation] The present invention is an oil seal that has dramatically improved fitting and sealing properties and press-fitting work due to the above structure.
すなわち、本考案のオイルシールＡは第１図に示すよう
に、保持部材１の固定部ａを段付き筒状に形成して嵌合
する一部分から段部a3にまで至る一部の周面上に弾性体
製のパッキング３を形成しており、このオイルシールＡ
を挿着するとき、ハウジングあるいは回転軸等の固定部
材４に前記強接触部a1を圧入するとその一部周面上にあ
るパッキング３は押し出され第２図の様に段部a3から非
接触部a2へ変形移動して装着完了される。ここでのパッ
キング３は接着設置されたものであるから元の設置箇所
への復元力を内部に貯めて移動圧縮された状態にあり、
従って単純に圧縮しただけのものに比べて反発力が大き
く相違し例え小さい質量であつても強い密封を発揮する
大きな作用を見せる。さらに、該パッキング３は装着状
態では大部分が嵌合される強接触部a1から押し出され圧
入部分に悪影響を及ぼさない位置にあるから保持部材１
が持つ寸法精度をもって正確に固定部材４に装着され、
従ってその装着精度は極めて高く長期の装着にあっても
緩み・歪み等の不具合を起こすことの無い最良の固定手
段となったものです。That is, as shown in FIG. 1, the oil seal A of the present invention has a fixed portion a of the holding member 1 formed on a stepped tubular shape and fitted on a part of the peripheral surface from the fitted portion to the stepped portion a3. An elastic packing 3 is formed on the oil seal A.
When the strong contact portion a1 is press-fitted into the fixing member 4 such as the housing or the rotating shaft when inserting and attaching the packing 3, the packing 3 on a part of the peripheral surface thereof is pushed out and the non-contact portion from the step portion a3 as shown in FIG. It is transformed to a2 and the installation is completed. Since the packing 3 here is adhesively installed, it is in a state of being compressed by storing the restoring force to the original installation place inside.
Therefore, the repulsive force is greatly different from that simply compressed, and even if the mass is small, a strong action is exhibited to exert a strong seal. Further, since the packing 3 is in a position where most of the packing 3 is pushed out from the strong contact portion a1 into which it is fitted and does not adversely affect the press-fitted portion, the holding member 1
Is attached to the fixing member 4 accurately with the dimensional accuracy of
Therefore, the mounting accuracy is extremely high, and it is the best fixing method that does not cause problems such as looseness and distortion even after long-term mounting.
また、前記の様に該パッキング３は非接触部a2近くに位
置するから極限的な圧縮状態から外れ、適度な弾性を維
持して良好な密封力を長期間発揮する。Further, as described above, since the packing 3 is located near the non-contact part a2, the packing 3 is out of the ultimate compressed state, maintains a proper elasticity, and exerts a good sealing force for a long time.
［実施例］ 本考案を実施するに、保持部材１に設けたパッキング３
は固定部材４の構造によって外周側または内周側のどち
ら側にでも設置でき（内周側に配備される場合段付き筒
形状の径寸法は大小が逆に配置される。）、その高さ及
び巾等の寸法も形状あるいは求められる性能によって逐
次変化させれば良いが、挿入時非接触部a2に移動できる
位置に配設することが望ましい。[Example] To carry out the present invention, the packing 3 provided on the holding member 1
Can be installed on either the outer peripheral side or the inner peripheral side depending on the structure of the fixing member 4 (when arranged on the inner peripheral side, the diameter dimension of the stepped cylindrical shape is reversed in size), and its height. The dimensions such as the width and the width may be sequentially changed according to the shape or the required performance, but it is desirable to dispose them at a position where they can move to the non-contact portion a2 during insertion.
また、本考案は第３図の様な複数の保持部材１と密封リ
ップ２を組み合わせたオイルシールＡ′にも用いること
が出来、該構造では前記正確な固定作用によって複雑な
構成物の各々が持つ多くの高度な密封作用を全て引き出
させる優れた構造となる。The present invention can also be used in an oil seal A'combining a plurality of holding members 1 and sealing lips 2 as shown in FIG. It is an excellent structure that can bring out all of the many advanced sealing effects that it has.
［考案の効果］ 以上の説明のように本考案は、高い取り付け精度をもっ
て強い密封を成さしめ装着が容易で材料歩留まりに優れ
る安価で画期的なオイルシールである。[Effects of the Invention] As described above, the present invention is an inexpensive and epoch-making oil seal that has a high sealing accuracy, provides a strong seal, is easy to mount, and has an excellent material yield.
第１図は本考案のオイルシールの一実施例を示す断面図
である。第２図は本考案のオイルシールを装着した状態
を示した部分断面図である。第３図は本考案の他の実施
例を示す断面図である。第４図は従来のオイルシールを
表した断面図である。 Ａ……オイルシール、a1……強接触部、a2……非あるい
は弱接触部、a3……段部 １……保持部材、２……密封リップ、３……パッキン
グ、４……固定部材FIG. 1 is a sectional view showing an embodiment of the oil seal of the present invention. FIG. 2 is a partial sectional view showing a state in which the oil seal of the present invention is attached. FIG. 3 is a sectional view showing another embodiment of the present invention. FIG. 4 is a sectional view showing a conventional oil seal. A ... Oil seal, a1 ... Strong contact part, a2 ... Non or weak contact part, a3 ... Step part 1 ... Holding member, 2 ... Sealing lip, 3 ... Packing, 4 ... Fixing member
Claims (1)
状の保持部材１と、弾性体製の密封リップ２とを組合せ
たオイルシールＡであって；前記保持部材１の固定部ａ
を先挿入部が大径で強圧入される強接触部a1と後挿入部
が小径で弱接触または小間隙を保つ非接触部a2との段付
き筒形状に形成し、該強接触部a1の周面上の一部から段
部a3の周面上へ弾性体からなるリング状のパッキング３
を設けたことを特徴とするオイルシール。1. An oil seal A in which an annular holding member 1 fitted to a housing or a rotating shaft and a sealing lip 2 made of an elastic body are combined; a fixing portion a of the holding member 1.
Is formed into a stepped tubular shape with a strong contact portion a1 in which the front insertion portion has a large diameter and is press-fitted and a rear insertion portion has a small diameter and a weak contact or a non-contact portion a2 that maintains a small gap. A ring-shaped packing 3 made of an elastic material from a part of the peripheral surface to the peripheral surface of the stepped portion a3
An oil seal characterized by the provision of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988099473U JPH0648208Y2 (en) | 1988-07-26 | 1988-07-26 | Oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1988099473U JPH0648208Y2 (en) | 1988-07-26 | 1988-07-26 | Oil seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0221372U JPH0221372U (en) | 1990-02-13 |
| JPH0648208Y2 true JPH0648208Y2 (en) | 1994-12-12 |
Family
ID=31326665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1988099473U Expired - Lifetime JPH0648208Y2 (en) | 1988-07-26 | 1988-07-26 | Oil seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648208Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0738767Y2 (en) * | 1989-01-13 | 1995-09-06 | エヌオーケー株式会社 | Sealing device |
| JP2508443Y2 (en) * | 1991-06-12 | 1996-08-21 | 内山工業株式会社 | Seal fitting structure |
| JP2515129Y2 (en) * | 1991-09-10 | 1996-10-30 | 矢崎総業株式会社 | Membrane gas meter shaft seal structure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0448370Y2 (en) * | 1987-10-07 | 1992-11-13 |
-
1988
- 1988-07-26 JP JP1988099473U patent/JPH0648208Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0221372U (en) | 1990-02-13 |
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