JPH0512534Y2 - - Google Patents
Info
- Publication number
- JPH0512534Y2 JPH0512534Y2 JP1986075942U JP7594286U JPH0512534Y2 JP H0512534 Y2 JPH0512534 Y2 JP H0512534Y2 JP 1986075942 U JP1986075942 U JP 1986075942U JP 7594286 U JP7594286 U JP 7594286U JP H0512534 Y2 JPH0512534 Y2 JP H0512534Y2
- Authority
- JP
- Japan
- Prior art keywords
- seal
- radial
- lip
- rotating shaft
- housing
- 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 19
- 239000013013 elastic material Substances 0.000 claims description 11
- 239000000428 dust Substances 0.000 description 12
- 239000000314 lubricant Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 239000004610 Internal Lubricant Substances 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000004576 sand 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、回転軸及び該回転軸に貫通されたハ
ウジング間のシール手段として使用される密封装
置に関し、更に詳しくは、過酷な環境条件下にお
ける使用に耐え得る密封装置の構造に関する。[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a sealing device used as a sealing means between a rotating shaft and a housing penetrated by the rotating shaft, and more specifically relates to a sealing device used as a sealing means between a rotating shaft and a housing penetrated by the rotating shaft. The present invention relates to the structure of a sealing device that can withstand use in the field.
（従来の技術）
例えば、シヨベルローダ等の建設機械における
回転軸のように、土砂等の環境下での運転を強い
られる回転軸の密封装置には、耐ダスト性につい
ての特別の配慮が必要である。(Prior art) For example, special consideration must be given to dust resistance for sealing devices for rotating shafts that are forced to operate in environments with dirt and sand, such as rotating shafts in construction machines such as shovel loaders. .
第２図に示すものは、耐ダスト性を留意した従
来の密封装置の一例であつて、回転軸１の周面と
摺動するゴム様弾性材料製主リツプ４及びフエル
ト製副リツプ５を有して外方の略Ｌ字形状断面の
円筒状固定環をハウジング２に取付けられ、副リ
ツプ５によつて外部ダストの侵入を阻止し、主リ
ツプ４によつて内部潤滑剤の流出を防止するよう
に構成されている。 The one shown in FIG. 2 is an example of a conventional sealing device that takes into account dust resistance, and has a main lip 4 made of a rubber-like elastic material that slides on the circumferential surface of a rotating shaft 1, and a sub-lip 5 made of felt. An outer cylindrical fixed ring with a substantially L-shaped cross section is attached to the housing 2, and a sub lip 5 prevents external dust from entering, and a main lip 4 prevents internal lubricant from flowing out. It is configured as follows.
（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密封装置は、構造が
簡単であつて特に外部ダストに対する阻止手段と
してフエルト製副リツプ５のみを備えるものであ
るために、シヨベルローダの駆動力伝達軸のよう
に、運転時の偏心及び軸方向のガタツキを避けら
れず、かつ過酷な環境条件下で使用されるものに
あつては、耐ダスト性が低く、かつ潤滑剤に対す
るシール機能においても問題が残されていた。(Problems to be Solved by the Invention) The sealing device according to the above-mentioned conventional technology has a simple structure and is particularly equipped with only the felt sub-lip 5 as a means for blocking external dust. Products such as force transmission shafts, which are prone to eccentricity and axial wobbling during operation and are used under harsh environmental conditions, have low dust resistance and poor sealing performance against lubricants. There remained a problem.
本考案は、上記した問題点を解消して優れた耐
ダスト性及び潤滑剤に対するシール機能を備えた
密封装置の構造を提示することを目的とするもの
である。 The object of the present invention is to solve the above-mentioned problems and to present a structure of a sealing device having excellent dust resistance and a sealing function against lubricant.
（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密封装置
における問題点を考慮してなされたもので、ハウ
ジング２を貫通した回転軸１の周面と摺動するゴ
ム様弾性材料製主リツプ４を備えて前記ハウジン
グ２に装着された第１にシール３と、径方向部分
及び該径方向部分の内端から軸方向大気側に伸び
る円筒形状部分を備え前記第１のシール３の大気
側に位置してハウジング２に固定された径方向部
材８と、前記径方向部材８の大気側に位置し、径
方向内端側が前記回転軸１上に固定され、径方向
外端側に前記径方向部材８を覆う大径円筒部分１
２を設けるとともに、前記円筒形状部分の外周側
に位置し、前記径方向部分と摺動するゴム様弾性
材料製端面シールリツプ１０を備えてなるスリン
ガ９とによつて構成したものである。(Means for Solving the Problems) The present invention has been made in consideration of the problems in the sealing devices according to the conventional technology described above. a first seal 3 having a main lip 4 made of a similar elastic material and mounted on the housing 2; a radial member 8 located on the atmosphere side of the seal 3 and fixed to the housing 2; a large diameter cylindrical portion 1 covering the radial member 8 on the outer end side;
2, and a slinger 9 comprising an end seal lip 10 made of a rubber-like elastic material located on the outer peripheral side of the cylindrical portion and sliding on the radial portion.
上記した第１のシール及び端面シールリツプに
よるシール機能の補助手段として、第１のシール
にフエルト製副リツプを付加するとか、径方向部
材と、回転軸に固定されるスリンガとの間にラビ
リンスシール構造を形成させる等の手段が講じら
れる。 As an auxiliary means for the sealing function of the first seal and end seal lip described above, a felt sub-lip may be added to the first seal, or a labyrinth seal structure may be used between the radial member and the slinger fixed to the rotating shaft. Measures are taken to form a
（作用）
上記した構成を備えた密封装置においては、第
１のシールに付されて回転軸の周面と摺動するゴ
ム様弾性材料製主リツプが潤滑剤の流出を阻止
し、径方向部材の側面と摺動するゴム様弾性材料
製端面シールリツプが、回転に伴う振り切り作用
を伴つて外部から侵入するダストを排除する。(Function) In the sealing device having the above configuration, the main lip made of a rubber-like elastic material attached to the first seal and sliding on the circumferential surface of the rotating shaft prevents the lubricant from flowing out, and prevents the lubricant from flowing out. An end face seal lip made of a rubber-like elastic material that slides on the side surface of the shaft eliminates dust that enters from the outside with the shaking off action that occurs with rotation.
第１のシールの補助手段として付加されたフエ
ルト製副リツプは、フランジ及び径方向部材、端
面シールリツプによるシールを通過した微細なダ
ストの潤滑剤側への侵入を阻止し、該シールの補
助手段として付加されたラビリンスシール構造
は、端面シールリツプによるダスト阻止機能に上
載させられて外部ダストに対する阻止能力を助長
する。 The felt sub-lip added as an auxiliary means for the first seal prevents fine dust that has passed through the seal formed by the flange, radial member, and end seal lip from entering the lubricant side. The added labyrinth seal structure superimposes the dust containment function provided by the end seal lip to facilitate external dust containment.
（実施例）
第１図の実施例においては、回転軸１の周面と
摺動するゴム様弾性材料製主リツプ４及びフエル
ト製副リツプ５を有する第１のシール３が、段付
きの円筒形状を呈する保持リング６を介してハウ
ジング２に取付けられ、略Ｚ字状の断面形状を呈
する環状体に成形された径方向部材８が、第１の
シール３に隣接して保持リング６に固定され、小
径円筒部１１及び保持リング６の外周と対向する
大径部１２を有し、径方向部材８の側面と摺動す
るゴム様弾性材料製端面シールリツプ１０を中間
に付されたスリンガ９が、小径円筒部１１を回転
軸１に嵌合されて、径方向部材８及び端面シール
リツプ１０によつて端面シールを形成し、小径円
筒部１１の外周と径方向部材８の内端との間及び
大径部１２と保持リング６の外周との間に、それ
ぞれ、ラビリンスシールを構成している。(Embodiment) In the embodiment shown in FIG. 1, the first seal 3, which has a main lip 4 made of a rubber-like elastic material and a sub lip 5 made of felt, which slides on the circumferential surface of the rotating shaft 1, has a stepped cylindrical shape. A radial member 8 , which is attached to the housing 2 via a retaining ring 6 having a shape and shaped as an annular body with a substantially Z-shaped cross-section, is fixed to the retaining ring 6 adjacent to the first seal 3 . The slinger 9 has a small diameter cylindrical part 11 and a large diameter part 12 facing the outer periphery of the retaining ring 6, and has an end seal lip 10 made of a rubber-like elastic material in the middle that slides on the side surface of the radial member 8. , the small diameter cylindrical portion 11 is fitted onto the rotating shaft 1, an end face seal is formed by the radial member 8 and the end face seal lip 10, and between the outer periphery of the small diameter cylindrical portion 11 and the inner end of the radial member 8, A labyrinth seal is formed between the large diameter portion 12 and the outer periphery of the retaining ring 6, respectively.
（考案の効果）
本考案の密封装置が、上記したように、回転軸
の周面と摺動するゴム様弾性材料製主リツプを備
えて前記ハウジングに装着された第１のシール
と、径方向部分及び該径方向部分の内端から軸方
向大気側に伸びる円筒形状部分を備え前記第１の
シールの大気側に位置してハウジングに固定され
た径方向部材と、前記径方向部材の大気側に位置
し、径方向内端側が前記回転軸上に固定され、径
方向外端側に前記径方向部材を覆う大径円筒部分
を、設けるとともに、前記円筒形状部分の外周側
に位置し、前記径方向部分と摺動するゴム様弾性
材料製端面シールリツプを備えてなるスリンガと
を有していることにより、スリンガが回転軸の回
転に伴つて外部から侵入しようとするダストや泥
水を振り切り、それでもなお、スリンガの内部に
泥水等が侵入しても、端面シールリツプによりそ
れ以上の侵入を阻止し、端面シールリツプの摩耗
または破損が生じて泥水等がさらに侵入したとし
ても、径方向部材の円筒形状部分により受け止め
られ、受け止められた泥水等は前記円筒形状部分
を伝つて回転軸１の下部に移動し外部に排出され
る。従つて、外部ダストや泥水の内部への侵入を
完全に阻止し、第１のシール３の損傷を防止する
ため、本考案の密封装置は良好な密封機能を保持
することができる。(Effects of the Invention) As described above, the sealing device of the present invention has a main lip made of a rubber-like elastic material that slides on the circumferential surface of the rotating shaft and is attached to the housing, and a radial member fixed to the housing and located on the atmosphere side of the first seal, the radial member having a cylindrical portion extending axially toward the atmosphere from an inner end of the radial portion; and an atmosphere side of the radial member. a large-diameter cylindrical portion located on the outer circumferential side of the cylindrical portion; By having a radial portion and a slinger comprising an end face seal lip made of a rubber-like elastic material that slides, the slinger can shake off dust and muddy water that try to enter from the outside as the rotating shaft rotates, and still Furthermore, even if muddy water etc. enters the inside of the slinger, the end face seal lip will prevent further intrusion. The muddy water or the like that is received by the rotary shaft 1 moves to the lower part of the rotating shaft 1 along the cylindrical portion and is discharged to the outside. Therefore, the sealing device of the present invention can maintain a good sealing function since the intrusion of external dust and muddy water into the interior is completely prevented and damage to the first seal 3 is prevented.
第１図は、本考案の一実施例の断面図、第２図
は、従来の技術による密封装置の一例の断面図で
ある。
１……回転軸、２……ハウジング、３……第１
のシール、４……主リツプ、５……副リツプ、６
……保持リング、７……第２のシール、８……径
方向部材、９……スリンガ、１０……端面シール
リツプ、１１……小径円筒部、１２……大径部。
FIG. 1 is a sectional view of an embodiment of the present invention, and FIG. 2 is a sectional view of an example of a conventional sealing device. 1...Rotating shaft, 2...Housing, 3...First
Seal, 4...Main lip, 5...Secondary lip, 6
... Retaining ring, 7 ... Second seal, 8 ... Radial member, 9 ... Slinger, 10 ... End seal lip, 11 ... Small diameter cylindrical part, 12 ... Large diameter part.
Claims (1)
するゴム様弾性材料製主リツプ４を備えて前記ハ
ウジング２に装着された第１のシール３と、径方
向部分及び該径方向部分の内端から軸方向大気側
に伸びる円筒形状部分を備え前記第１のシール３
の大気側に位置してハウジング２に固定された径
方向部材８と、前記径方向部材８の大気側に位置
し、径方向内端側が前記回転軸１上に固定され、
径方向外端側に前記径方向部材８を覆う大径円筒
部分１２を設けるとともに、前記円筒形状部分の
外周側に位置し、前記径方向部分と摺動するゴム
様弾性材製端面シールリツプ１０を備えてなるス
リンガ９とを有する密封装置。 A first seal 3 is attached to the housing 2 and includes a main lip 4 made of a rubber-like elastic material that slides on the circumferential surface of the rotating shaft 1 passing through the housing 2, and a radial portion and an inner portion of the radial portion. The first seal 3 includes a cylindrical portion extending from the end toward the atmosphere in the axial direction.
a radial member 8 located on the atmospheric side and fixed to the housing 2; a radial member 8 located on the atmospheric side of the radial member 8 and having a radially inner end side fixed on the rotating shaft 1;
A large-diameter cylindrical portion 12 covering the radial member 8 is provided at the outer end in the radial direction, and an end seal lip 10 made of a rubber-like elastic material is provided on the outer periphery of the cylindrical portion and slides with the radial portion. A sealing device comprising a slinger 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986075942U JPH0512534Y2 (en) | 1986-05-20 | 1986-05-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1986075942U JPH0512534Y2 (en) | 1986-05-20 | 1986-05-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62185977U JPS62185977U (en) | 1987-11-26 |
| JPH0512534Y2 true JPH0512534Y2 (en) | 1993-03-31 |
Family
ID=30922554
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1986075942U Expired - Lifetime JPH0512534Y2 (en) | 1986-05-20 | 1986-05-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0512534Y2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4180829B2 (en) * | 2002-01-21 | 2008-11-12 | イーグル工業株式会社 | Sealing device |
| JP2010180944A (en) * | 2009-02-05 | 2010-08-19 | Tsubaki Emerson Co | Unitized sealing member |
| JP5896115B2 (en) * | 2011-11-25 | 2016-03-30 | Nok株式会社 | Sealing device |
| JP6290843B2 (en) * | 2015-10-05 | 2018-03-07 | Nok株式会社 | Sealing device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS53101154U (en) * | 1977-01-20 | 1978-08-15 |
-
1986
- 1986-05-20 JP JP1986075942U patent/JPH0512534Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62185977U (en) | 1987-11-26 |
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