JPS5912901B2 - Automatic pressure regulating oil seal - Google Patents
Automatic pressure regulating oil sealInfo
- Publication number
- JPS5912901B2 JPS5912901B2 JP54048442A JP4844279A JPS5912901B2 JP S5912901 B2 JPS5912901 B2 JP S5912901B2 JP 54048442 A JP54048442 A JP 54048442A JP 4844279 A JP4844279 A JP 4844279A JP S5912901 B2 JPS5912901 B2 JP S5912901B2
- Authority
- JP
- Japan
- Prior art keywords
- oil seal
- pressure regulating
- regulating oil
- automatic pressure
- bearing
- 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
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Of Bearings (AREA)
Description
【発明の詳細な説明】
従来は第３図の如くオイルシール３１あるいは３１’の
外周は・・ウノングに圧入される構造のため圧入強度を
保つために金属インサート３２あるいは３２’が使用さ
れ、これによつて・・ウジング（図示せず）に固定され
ていた。DETAILED DESCRIPTION OF THE INVENTION Conventionally, as shown in Fig. 3, the outer periphery of the oil seal 31 or 31' is press-fitted into a seal, so a metal insert 32 or 32' is used to maintain the strength of the press-fit. It was fixed to a mounting (not shown) by...
このため密閉型軸受においては内部圧力の変化に対応出
来ず、このため・・ウジング側面に孔をあける等の手段
を講じていた。このため機器の姿勢に制約があり、孔位
置が必ず上方に来る様にしないと油漏れ等の事故を起す
ことがあわ、完全密閉は困難であつた。本発明は前記従
来の欠点を除去するものである。以下、本発明の一実施
例につき添付図面第１図および第２図に沿つて説明する
。本発明の自動調圧型オイルシール１は金属インサート
のない形状で、リップ２は従来と同じくシャフト３の軸
封に対して作られているが、オイルシール外周は複数個
のひだ４を有している。For this reason, sealed bearings cannot respond to changes in internal pressure, and for this reason, measures such as drilling holes in the side surfaces of the housings have been taken. For this reason, there are restrictions on the posture of the equipment, and unless the hole is always positioned upwards, accidents such as oil leakage may occur, and complete sealing is difficult. The present invention eliminates the drawbacks of the prior art. An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 of the accompanying drawings. The self-pressure regulating oil seal 1 of the present invention has a shape without a metal insert, and the lip 2 is made to seal the shaft 3 as in the conventional case, but the outer periphery of the oil seal has a plurality of folds 4. There is.
このひだ４の作用効果は第２図のように一・ウジシダ５
には、先端に抜止めリング６を有するシャフト３が、メ
タルＴ、８により支持され自由に回転する様になつてい
る。又、９は・・ウジング内の凹部でオイルシール１が
挿入される保持部である。１０はオイルシール１の抜止
めつばであわ、従来１０のオイルシール３１、３１’は
・・ウジングの内部に圧入するため、・・ウジングの内
径と、オイルシール外径の嵌合寸法も相当な圧力精度を
有していたが、本発明のオイルシール１はひだ４が弾力
を有しておわ、先端は油切わ効果をより大きくするた１
５め尖つておわ、ハウジング５の凹部９の寸法と、オイ
ルシール１の外径とが多少の締代をもつておれば密閉効
果を発揮出来るものである。The effect of this fold 4 is as shown in Figure 2.
A shaft 3 having a retaining ring 6 at its tip is supported by metal T, 8 and is configured to rotate freely. Further, 9 is a holding portion in which the oil seal 1 is inserted, which is a recess in the housing. 10 is covered by the retaining collar of the oil seal 1, and the conventional oil seals 31 and 31' of 10 are press-fitted into the inside of the housing, so the fitting dimensions between the inside diameter of the housing and the outside diameter of the oil seal are also quite large. However, in the oil seal 1 of the present invention, the pleats 4 have elasticity, and the tip has an elasticity 1 to increase the oil cutting effect.
Fifth, if the dimensions of the concave portion 9 of the housing 5 and the outer diameter of the oil seal 1 have some interference, a sealing effect can be achieved.
本発明の自動調圧型オイルシールは内外周に弾力を有す
るため・・ウシング５への組付けも軽く挿入するのみで
よく、きわめて簡単に組立てが出来る。また、取付け状
態は第２図の様な状態となわ、ハウジング５の凹部９の
長さＬより、オイルシール１の厚さｌを薄くし、即ち、
Ｌ＞１としておくことにより軸受内部の温度変化があれ
ば、オイルシール１は凹部９内を矢印Ａ又はＢ方向に移
動し自動的に軸受内部圧力を調整できるものである。さ
らに、オイルシール１のひだ４の数、および矢印Ａ、Ｂ
方向への移動量は内部圧力の変化、軸封効果に対して十
分効果のある様に設定すればよ３０い。本発明の自動調
圧型オイルシールは、密閉型軸受の・・ウジングの凹部
に内装され、軸受内部の圧力の変動に対し軸方向に移動
可能とし、かつ自動的に調圧を行ない油切り効果を有す
るひだをオイ’１５ルシール外周に複数個設けたもので
、従来の欠点を解消するとともに、ハウンングヘの組付
けも簡単となわ、オイルシール外周のひだの数を任意設
ハｑ−定することにより軸封効果を調整でき、軸受内部
の温度変化があれば、自動的に軸方向に移動して軸受内
部圧力を調整できる優れた効果を奏するものである。Since the self-pressure regulating oil seal of the present invention has elasticity on its inner and outer peripheries, it can be assembled into the bushing 5 by only lightly inserting it, making it extremely easy to assemble. In addition, the installed state is as shown in FIG. 2, and the thickness l of the oil seal 1 is made thinner than the length L of the recess 9 of the housing 5, that is,
By setting L>1, if there is a temperature change inside the bearing, the oil seal 1 can move within the recess 9 in the direction of arrow A or B, and automatically adjust the bearing internal pressure. Furthermore, the number of pleats 4 of the oil seal 1, and arrows A and B
The amount of movement in the direction should be set to be sufficiently effective against changes in internal pressure and shaft sealing effect. The self-pressure regulating oil seal of the present invention is installed in a recess in the housing of a sealed bearing, and is movable in the axial direction in response to pressure fluctuations inside the bearing, and automatically regulates pressure to achieve an oil draining effect. This oil seal has multiple folds on the outer periphery of the oil seal, which eliminates the drawbacks of the conventional oil seal, and also makes it easy to assemble to the hoisting. The shaft sealing effect can be adjusted, and if there is a temperature change inside the bearing, it can automatically move in the axial direction to adjust the internal pressure of the bearing, which is an excellent effect.
第１図は本発明の一実施例における自動調圧型オイルシ
ールの断面図、第２図は同オイルシールを密閉型軸受に
取付けた状態を示す断面図、第３図、第４図はそれぞれ
従来のオイルシールの断面図である。
１・・迫動調圧型オイルシール、２・・・リツプ、３・
・・シヤフト、４・・・ひだ、５・・・ハウジング。Fig. 1 is a cross-sectional view of an automatic pressure regulating oil seal according to an embodiment of the present invention, Fig. 2 is a cross-sectional view showing the oil seal installed in a sealed bearing, and Figs. 3 and 4 are conventional oil seals. FIG. 1. Pressure regulating oil seal, 2. Lip, 3.
...Shaft, 4...Fold, 5...Housing.
Claims (1)
の変動に対し軸方向に移動可能に内装され、かつ、内周
部にシャフトに当接するリップを設けると共に、外周部
に油切り効果を有するひだを複数個設けてなる自動調圧
型オイルシール。1 A recess in the housing of a sealed bearing is internally movable in the axial direction in response to pressure fluctuations inside the bearing, and has a lip on the inner periphery that comes into contact with the shaft, and has an oil draining effect on the outer periphery. A self-pressure regulating oil seal with multiple folds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54048442A JPS5912901B2 (en) | 1979-04-18 | 1979-04-18 | Automatic pressure regulating oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP54048442A JPS5912901B2 (en) | 1979-04-18 | 1979-04-18 | Automatic pressure regulating oil seal |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55139557A JPS55139557A (en) | 1980-10-31 |
| JPS5912901B2 true JPS5912901B2 (en) | 1984-03-26 |
Family
ID=12803459
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP54048442A Expired JPS5912901B2 (en) | 1979-04-18 | 1979-04-18 | Automatic pressure regulating oil seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5912901B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533843Y2 (en) * | 1986-06-10 | 1993-08-27 | ||
| JPH0533844Y2 (en) * | 1986-06-10 | 1993-08-27 | ||
| JPH0533842Y2 (en) * | 1986-06-10 | 1993-08-27 |
-
1979
- 1979-04-18 JP JP54048442A patent/JPS5912901B2/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0533843Y2 (en) * | 1986-06-10 | 1993-08-27 | ||
| JPH0533844Y2 (en) * | 1986-06-10 | 1993-08-27 | ||
| JPH0533842Y2 (en) * | 1986-06-10 | 1993-08-27 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55139557A (en) | 1980-10-31 |
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