JPH0225017Y2

JPH0225017Y2 -

Info

Publication number: JPH0225017Y2
Application number: JP1985014671U
Authority: JP
Priority date: 1985-02-06
Filing date: 1985-02-06
Publication date: 1990-07-10
Also published as: JPS61131566U

Description

【考案の詳細な説明】（産業上の利用分野）本考案はオイルシールに関する。[Detailed explanation of the idea] (Industrial application field) The present invention relates to an oil seal.

（従来の技術）従来、第１図示のように回転軸ａの周囲に例え
ば２個のゴム製のパツキンｂ，ｂを中間にスペー
サリングｃを介在して嵌着させ、該回転軸ａの周
面とばねｅで押された該パツキンｂのリツプ部ｄ
との摺接部分に於て、該スペーサｃを介して導か
れる潤滑油をシールするを一般とする。(Prior Art) Conventionally, as shown in FIG. Lip part d of the seal b pressed by the surface and spring e
Generally, the lubricating oil introduced through the spacer c is sealed at the sliding contact portion with the spacer c.

（考案が解決しようとする問題点）前記のような従来のものでは回転軸ａとリツプ
部ｄの摺接部分に油膜が形成され難く、該リツプ
部ｄの焼損や摩耗が大きくなり、オイルシールの
寿命が比較的短く、短期間でパツキンｂ，ｂの交
換が必要で保守が煩らわしい不都合がある。(Problems to be Solved by the Invention) In the conventional device as described above, it is difficult to form an oil film on the sliding contact area between the rotating shaft a and the lip portion d, and the lip portion d is prone to burnout and wear, resulting in damage to the oil seal. has a relatively short lifespan, and the gaskets b and b need to be replaced in a short period of time, making maintenance cumbersome.

本考案はリツプ部に油膜を形成させることによ
り、前記不都合を解決することを目的とするもの
である。 The present invention aims to solve the above-mentioned disadvantages by forming an oil film on the lip portion.

（問題点を解決するための手段）本考案では、回転軸の周囲に、一対のゴムその
他の環状のパツキンを嵌着し、該回転軸の周面と
各パツキンのリツプ部とで潤滑油をシールするよ
うにしたものに於いて、該パツキンの環状のリツ
プ部を該回転軸の軸方向に蛇行させて形成するよ
うにした。(Means for solving the problem) In the present invention, a pair of rubber or other annular packings are fitted around the rotating shaft, and lubricating oil is applied between the circumferential surface of the rotating shaft and the lip of each packing. In the sealing device, the annular lip portion of the packing is formed to meander in the axial direction of the rotating shaft.

（作用）該回転軸の周面に摺接するリツプ部に於て潤滑
油をシールすることは従来のものと同様である
が、該リツプ部を回転軸の軸方向に蛇行させてあ
るので、該リツプ部は該回転軸の周面に対しその
蛇行する幅の分だけ広い帯域に於いて摺接する。
該帯域は潤滑油に接して油膜が形成され、その上
をリツプ部が摺接するので回転軸との摩擦が少な
くなり、該リツプ部の寿命が延長されてその交換
の回数を少なく出来る。(Function) The sealing of lubricating oil at the lip that slides on the circumferential surface of the rotating shaft is the same as in conventional seals, but since the lip is meandered in the axial direction of the rotating shaft, The lip portion slides into contact with the circumferential surface of the rotating shaft over a wide band corresponding to its meandering width.
The zone contacts the lubricating oil to form an oil film, and since the lip portion slides on the oil film, friction with the rotating shaft is reduced, the life of the lip portion is extended, and the number of times the lip portion needs to be replaced can be reduced.

（実施例）本考案の実施例を第２図につき説明すると、１
は回転軸、２は該回転軸１に嵌着されその周囲の
ケーシング３に保持させて設けたゴム製その他の
環状のパツキンで、図示の例ではスペーサリング
４を介してその左右にパツキン２，２を配置し、
油孔５から両パツキン２，２間に潤滑油が供給さ
れるようにした。６はばね７により押されて回転
軸１の周面に摺接するリツプ部である。(Example) An example of the present invention will be explained with reference to FIG.
2 is a rotating shaft, and 2 is an annular gasket made of rubber or other material fitted to the rotating shaft 1 and held by a casing 3 around it. In the illustrated example, gaskets 2, Place 2,
Lubricating oil is supplied between the gaskets 2 and 2 from the oil hole 5. Reference numeral 6 denotes a lip portion that is pushed by a spring 7 and comes into sliding contact with the circumferential surface of the rotating shaft 1.

以上の構成は従来のものと同様であるが、本考
案のものに於いては、該パツキン２のリツプ部６
を回転軸１の軸方向にｌの蛇行幅で蛇行させたの
でリツプ部６を越えて外方まで油膜８を形成させ
得、リツプ部６は油膜８を介して回転軸１と摺接
し、該リツプ部６の焼付摩耗が少なくなる。 The above structure is the same as that of the conventional one, but in the one of the present invention, the lip part 6 of the packing 2
Since the oil film 8 is made to meander in the axial direction of the rotating shaft 1 with a meandering width of l, it is possible to form an oil film 8 extending beyond the lip portion 6 to the outside, and the lip portion 6 is in sliding contact with the rotating shaft 1 via the oil film 8. Seizure wear of the lip portion 6 is reduced.

（考案の効果）このように本考案によるときは、パツキンのリ
ツプ部を回転軸の軸方向に蛇行させたので、リツ
プ部が摺接する回転軸の周面に潤滑油の油膜を形
成させ得、該パツキンの焼付や摩耗を防止出来て
その寿命を延長出来、保守が容易になる等の効果
がある。(Effects of the invention) As described above, according to the invention, since the lip part of the packing is made to meander in the axial direction of the rotating shaft, an oil film of lubricating oil can be formed on the circumferential surface of the rotating shaft with which the lip part slides. This has the effect of preventing seizure and wear of the packing, extending its life, and facilitating maintenance.

[Brief explanation of the drawing]

第１図は従来例の断面図、第２図は本考案の実
施例の断面図である。１……回転軸、２……パツキン、６……リツプ
部。 FIG. 1 is a sectional view of a conventional example, and FIG. 2 is a sectional view of an embodiment of the present invention. 1... Rotating shaft, 2... Packing, 6... Lip portion.

Claims

[Scope of utility model registration request]

A pair of rubber or other annular packings are fitted around a rotating shaft with a gap between them, and the lubricating oil is sealed between the circumferential surface of the rotating shaft and the lip of each packing. and an annular lip portion of the packing is formed to meander in the axial direction of the rotating shaft.