JPH0594574U - Sealing device - Google Patents
Sealing deviceInfo
- Publication number
- JPH0594574U JPH0594574U JP040292U JP4029292U JPH0594574U JP H0594574 U JPH0594574 U JP H0594574U JP 040292 U JP040292 U JP 040292U JP 4029292 U JP4029292 U JP 4029292U JP H0594574 U JPH0594574 U JP H0594574U
- Authority
- JP
- Japan
- Prior art keywords
- seal lip
- flexible portion
- annular
- seal
- flexible
- 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.)
- Withdrawn
Links
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Abstract
(57)【要約】
【目的】 シールリップを安定保持した厚肉部の保持力
を維持しつつその剛性を弱めた密封装置を提供する。
【構成】 ハウジング５に固定される環状の固定部７を
設け、該固定部７の内周側に弾性変形自在な環状の可撓
部８を設け、該可撓部８の内周側にゴム状弾性体よりな
る環状のシールリップ９を設け、前記可撓部８とシール
リップ９との接続部に、前記可撓部８より厚肉で、か
つ、シールリップ９の内径より大きい内径に設定した環
状のバンパー部１１を設け、該バンパー部１１に補強環
を取り付けたオイルシール１において、前記補強環をば
ね１４で構成した。
(57) [Abstract] [Purpose] To provide a sealing device in which the rigidity is weakened while maintaining the holding force of a thick portion that stably holds a seal lip. An annular fixing portion 7 fixed to the housing 5 is provided, an elastically deformable annular flexible portion 8 is provided on the inner peripheral side of the fixing portion 7, and a rubber is provided on the inner peripheral side of the flexible portion 8. An annular seal lip 9 made of elastic material is provided, and the inner diameter of the connecting portion between the flexible portion 8 and the seal lip 9 is thicker than the flexible portion 8 and larger than the inner diameter of the seal lip 9. In the oil seal 1 in which the annular bumper portion 11 described above is provided and the reinforcing ring is attached to the bumper portion 11, the reinforcing ring is constituted by the spring 14.
Description
【０００１】[0001]
本考案は、例えば自動車のリヤアクスル等軸偏心の発生する部位に使用される 密封装置に関する。 The present invention relates to a sealing device used in a portion of a rear axle of an automobile where axial eccentricity occurs, for example.
【０００２】[0002]
図２は従来の密封装置としてのオイルシール１００を示している。オイルシー ル１００は、ハウジング１０１の軸孔１０２に嵌合固定される固定部としての金 属環１０３と、金属環１０３の内周側に接合したゴム状弾性体製の環状のシール 本体１０４とを有する。 FIG. 2 shows an oil seal 100 as a conventional sealing device. The oil seal 100 includes a metal ring 103 as a fixing portion that is fitted and fixed in the shaft hole 102 of the housing 101, and an annular seal body 104 made of a rubber-like elastic body and joined to the inner peripheral side of the metal ring 103. Have.
【０００３】 シール本体１０４は断面略Ｖ字形に成形された可撓部１０５と、可撓部１０５ の内周に一体成形したシールリップ１０６とを有する。シールリップ１０６の背 面にはばね１０７を装着してある。The seal body 104 has a flexible portion 105 formed in a substantially V-shaped cross section, and a seal lip 106 integrally formed on the inner circumference of the flexible portion 105. A spring 107 is attached to the back surface of the seal lip 106.
【０００４】 また、可撓部１０５とシールリップ１０６との接続部には、可撓部１０５より 厚肉に設定した厚肉部１０８を設けてある。厚肉部１０８の内径はシールリップ １０６の内径よりも大きい。そして、厚肉部１０８には補強環としての金属環１ ０９を埋め込んである。A thick portion 108 that is thicker than the flexible portion 105 is provided at the connecting portion between the flexible portion 105 and the seal lip 106. The inner diameter of the thick portion 108 is larger than the inner diameter of the seal lip 106. A metal ring 109 as a reinforcing ring is embedded in the thick wall portion 108.
【０００５】 上記構成において、シールリップ１０６が軸１１０に接触し、シール面を形成 する。In the above structure, the seal lip 106 contacts the shaft 110 to form a seal surface.
【０００６】 一方、軸１１０の偏心時には、可撓部１０５が弾性変形することで該偏心を吸 収し、シールリップ１０６を軸１１０に追随させる。また、厚肉部１０８，金属 環１０９は、その剛性によりシールリップ１０６自体が固定端、即ち、可撓部１ ０５との接続部を支点として不用意に変形することを防ぐ。On the other hand, when the shaft 110 is eccentric, the flexible portion 105 elastically deforms to absorb the eccentricity and cause the seal lip 106 to follow the shaft 110. Further, the rigidity of the thick portion 108 and the metal ring 109 prevents the seal lip 106 itself from being inadvertently deformed with the fixed end, that is, the connecting portion with the flexible portion 105 as a fulcrum.
【０００７】[0007]
しかし、上記従来例では、金属環１０９があるため厚肉部１０８の剛性が高く なりすぎる。従って、軸１１０が偏心して厚肉部１０８の内周面に接触した状態 における可撓部１０５の弾性変形を阻害し、偏心追随性が低下してシール性が低 下することがあった。 However, in the above-mentioned conventional example, since the metal ring 109 is present, the rigidity of the thick portion 108 becomes too high. Therefore, when the shaft 110 is eccentric and contacts the inner peripheral surface of the thick wall portion 108, elastic deformation of the flexible portion 105 is obstructed, and the eccentricity followability is lowered, and the sealing performance is sometimes lowered.
【０００８】 本考案は上記課題を解決するためのもので、シールリップを安定保持した厚肉 部の保持力を維持しつつその剛性を弱めた密封装置を提供することを目的として いる。The present invention is intended to solve the above problems, and an object of the present invention is to provide a sealing device in which the rigidity is weakened while maintaining the holding force of a thick wall portion that stably holds a seal lip.
【０００９】[0009]
上記目的を達成するため本考案は、ハウジングに固定される環状の固定部を設 け、該固定部の内周側に弾性変形自在な環状の可撓部を設け、該可撓部の内周側 にゴム状弾性体よりなる環状のシールリップを設け、前記可撓部とシールリップ との接続部に、前記可撓部より厚肉で、かつ、シールリップの内径より大きい内 径に設定した環状の厚肉部を設け、該厚肉部に補強環を取り付けた密封装置にお いて、前記補強環をばねで構成した。 In order to achieve the above object, the present invention provides an annular fixing part fixed to a housing, and an elastically deformable annular flexible part is provided on the inner peripheral side of the fixing part. An annular seal lip made of rubber-like elastic material was provided on the side, and the connecting portion between the flexible portion and the seal lip was set to be thicker than the flexible portion and to have an inner diameter larger than the inner diameter of the seal lip. In the sealing device in which the annular thick portion is provided and the reinforcing ring is attached to the thick portion, the reinforcing ring is formed of a spring.
【００１０】[0010]
上記構成に基づく本考案はシールリップによりシール面が形成される。軸の偏 心時には可撓部が弾性変形することでこれを吸収し、シールリップが追随する。 また、厚肉部はシールリップを安定保持している。 In the present invention based on the above configuration, the sealing surface is formed by the sealing lip. When the shaft is eccentric, the flexible portion elastically deforms and absorbs this, and the seal lip follows. Further, the thick portion stably holds the seal lip.
【００１１】 軸が偏心して厚肉部に当接すると、ばねの弾性力によって厚肉部が剛性が弱く 弾性変形するため、可撓部で吸収できない偏心を厚肉部が変形して吸収する。When the shaft is eccentric and comes into contact with the thick portion, the thick portion deforms and absorbs the eccentricity that cannot be absorbed by the flexible portion, because the thick portion is weak in rigidity and elastically deformed by the elastic force of the spring.
【００１２】[0012]
図１は本考案を適用したオイルシール１の半断面図である。オイルシール１は ゴム状弾性体よりなるシール本体２と、シール本体２内に埋め込んだ金属環３と 、シール本体２へと組付けた金属環４とを有する。 FIG. 1 is a half sectional view of an oil seal 1 to which the present invention is applied. The oil seal 1 has a seal body 2 made of a rubber-like elastic body, a metal ring 3 embedded in the seal body 2, and a metal ring 4 assembled to the seal body 2.
【００１３】 シール本体２はハウジング（自動車のリヤアクスルケース等）５の軸孔６に嵌 合される環状の固定部７と、固定部７の内周側に一体的に接続した断面略Ｖ字形 の可撓部８と、可撓部８の内周側に一体的に接続したシールリップ９とを有する 。The seal body 2 has an annular fixing portion 7 that is fitted in a shaft hole 6 of a housing (a rear axle case of an automobile, etc.), and has a substantially V-shaped cross section integrally connected to the inner peripheral side of the fixing portion 7. It has a flexible portion 8 and a seal lip 9 integrally connected to the inner peripheral side of the flexible portion 8.
【００１４】 前記金属環３は略Ｌ字形の断面形状を有する。またシールリップ９の背面には ばね１０を装着してある。可撓部８とシールリップ９との接続部、即ち、シール リップ９の固定端には環状の厚肉部としてのバンパー部１１を設けてある。バン パー部１１の肉厚、即ち、径方向寸法は、可撓部８よりも厚く、該可撓部８より も剛性が高い。またバンパー部１１の内周面には平坦部１２を形成してあり、そ の内径はシールリップ９の内径よりも大きく設定してある。The metal ring 3 has a substantially L-shaped cross section. A spring 10 is attached to the back surface of the seal lip 9. A bumper portion 11 as an annular thick portion is provided at the connecting portion between the flexible portion 8 and the seal lip 9, that is, at the fixed end of the seal lip 9. The bumper portion 11 has a wall thickness, that is, a radial dimension that is thicker than the flexible portion 8 and higher in rigidity than the flexible portion 8. A flat portion 12 is formed on the inner peripheral surface of the bumper portion 11, and its inner diameter is set to be larger than the inner diameter of the seal lip 9.
【００１５】 そして、バンパー部１１の外周側には環状の取付溝１３を設けてあり、取付溝 １３に補強環としてのばね１４を装着してある。An annular mounting groove 13 is provided on the outer peripheral side of the bumper portion 11, and a spring 14 as a reinforcing ring is mounted in the mounting groove 13.
【００１６】 上記構成において、シールリップ９が軸（自動車のドライブシャフト等）１５ に接触してシール面を形成し、流体Ａを密封する。軸１５が偏心するとバンパー 部１１に接触するとともに、可撓部８が弾性変形して偏心を吸収し、シールリッ プ９が軸１５に追随する。In the above structure, the seal lip 9 contacts the shaft (drive shaft of an automobile or the like) 15 to form a seal surface, and seals the fluid A. When the shaft 15 is eccentric, it comes into contact with the bumper portion 11, and the flexible portion 8 elastically deforms to absorb the eccentricity, and the seal lip 9 follows the shaft 15.
【００１７】 また、バンパー部１１剛性はばね１４の緊迫力によって高まっており、バンパ ー部１１は断面形状は略真円に近い状態に維持される。従って、シールリップ９ と可撓部８との接続部分が変形することはない。Further, the rigidity of the bumper portion 11 is increased by the tightening force of the spring 14, so that the cross-sectional shape of the bumper portion 11 is maintained in a state close to a substantially perfect circle. Therefore, the connecting portion between the seal lip 9 and the flexible portion 8 is not deformed.
【００１８】 また軸１５が速く、大きく偏心した場合でも、ばね１４に弾性力があるためバ ンパー部１１は変形し易く、可撓部８の変形限界に達してもバンパー１１が変形 することで軸１５に追随し得る。従って、シール面のシール性を常時確保できる 。そして、ばね１４の弾性力を変えることにより、追随性を調整することができ る。Further, even if the shaft 15 is fast and largely eccentric, the spring 14 has an elastic force, so that the bumper portion 11 is easily deformed, and even if the deformation limit of the flexible portion 8 is reached, the bumper 11 is deformed. It can follow the axis 15. Therefore, the sealing property of the sealing surface can always be ensured. Then, the followability can be adjusted by changing the elastic force of the spring 14.
【００１９】 なお、金属環４は流体Ａの圧力上昇が、まともにシールリップ９の背面に加わ ることを防ぐ。The metal ring 4 prevents the pressure increase of the fluid A from being applied to the back surface of the seal lip 9 properly.
【００２０】 更に、偏心した軸１５が元の位置に復帰すれば、可撓部８，バンパー部１１も 元も形状に復元することは勿論である。Furthermore, if the eccentric shaft 15 returns to its original position, the flexible portion 8 and the bumper portion 11 will of course return to their original shape.
【００２１】 本考案のオイルシール１は建設機械，自動車，ポンプ，攪拌機等何にでも適用 できる。また、金属環４のないオイルシールでもよい。The oil seal 1 of the present invention can be applied to any construction machine, automobile, pump, stirrer or the like. Alternatively, an oil seal without the metal ring 4 may be used.
【００２２】[0022]
以上のように本考案においては、軸が速く、大きく偏心した場合でも、ばねに 弾性力があるため厚肉部は変形し易く、可撓部の変形限界になった後に厚肉部が 変形することで軸に追随し得る。従って、シール面のシール性を常時確保できる 。 As described above, in the present invention, even when the shaft is fast and largely eccentric, the thick portion is easily deformed due to the elastic force of the spring, and the thick portion is deformed after reaching the deformation limit of the flexible portion. It can follow the axis. Therefore, the sealing property of the sealing surface can always be ensured.
【図１】本考案を適用したオイルシールの半断面図。FIG. 1 is a half sectional view of an oil seal to which the present invention is applied.
【図２】従来のオイルシールの半断面図。FIG. 2 is a half sectional view of a conventional oil seal.
【符号の説明】 １ オイルシール ２ シール本体 ３，４ 金属環 ５ ハウジング ６ 軸孔 ７ 固定部 ８ 可撓部 ９ シールリップ １０，１４ ばね １１ バンパー部 １２ 平坦部 １３ 取付溝 １５ 軸 Ａ 流体[Explanation of symbols] 1 oil seal 2 seal body 3,4 metal ring 5 housing 6 shaft hole 7 fixed part 8 flexible part 9 seal lip 10,14 spring 11 bumper part 12 flat part 13 mounting groove 15 shaft A fluid
Claims (1)
設け、該固定部の内周側に弾性変形自在な環状の可撓部
を設け、該可撓部の内周側にゴム状弾性体よりなる環状
のシールリップを設け、前記可撓部とシールリップとの
接続部に、前記可撓部より厚肉で、かつ、シールリップ
の内径より大きい内径に設定した環状の厚肉部を設け、
該厚肉部に補強環を取り付けた密封装置において、 前記補強環をばねで構成したことを特徴とする密封装
置。1. An annular fixing portion fixed to a housing is provided, an elastically deformable annular flexible portion is provided on an inner peripheral side of the fixing portion, and a rubber-like elastic body is provided on an inner peripheral side of the flexible portion. And an annular thick portion having a larger inner diameter than the flexible portion and having an inner diameter larger than the inner diameter of the seal lip is provided at a connecting portion between the flexible portion and the seal lip. ,
A sealing device in which a reinforcing ring is attached to the thick portion, wherein the reinforcing ring is formed of a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP040292U JPH0594574U (en) | 1992-05-21 | 1992-05-21 | Sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP040292U JPH0594574U (en) | 1992-05-21 | 1992-05-21 | Sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0594574U true JPH0594574U (en) | 1993-12-24 |
Family
ID=12576535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP040292U Withdrawn JPH0594574U (en) | 1992-05-21 | 1992-05-21 | Sealing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0594574U (en) |
-
1992
- 1992-05-21 JP JP040292U patent/JPH0594574U/en not_active Withdrawn
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19960801 |