JPH04102769A - Oil seal - Google Patents
Oil sealInfo
- Publication number
- JPH04102769A JPH04102769A JP2221680A JP22168090A JPH04102769A JP H04102769 A JPH04102769 A JP H04102769A JP 2221680 A JP2221680 A JP 2221680A JP 22168090 A JP22168090 A JP 22168090A JP H04102769 A JPH04102769 A JP H04102769A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing ring
- elastic body
- rubber elastic
- radial direction
- oil seal
- 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.)
- Pending
Links
- 229920001971 elastomer Polymers 0.000 claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 16
- 238000000034 method Methods 0.000 claims abstract description 6
- 239000002904 solvent Substances 0.000 claims abstract description 6
- 238000000465 moulding Methods 0.000 claims description 5
- QHZOMAXECYYXGP-UHFFFAOYSA-N ethene;prop-2-enoic acid Chemical compound C=C.OC(=O)C=C QHZOMAXECYYXGP-UHFFFAOYSA-N 0.000 claims description 3
- 229920006226 ethylene-acrylic acid Polymers 0.000 claims description 3
- 238000004132 cross linking Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 8
- 239000000806 elastomer Substances 0.000 abstract description 5
- 239000000945 filler Substances 0.000 abstract description 5
- 239000003795 chemical substances by application Substances 0.000 abstract description 4
- 239000000463 material Substances 0.000 abstract description 4
- 239000005977 Ethylene Substances 0.000 abstract description 3
- -1 ethylene acrylic ester Chemical class 0.000 abstract description 3
- 239000000049 pigment Substances 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract description 3
- 150000001875 compounds Chemical class 0.000 abstract 1
- 238000007865 diluting Methods 0.000 abstract 1
- 238000010422 painting Methods 0.000 abstract 1
- 239000003921 oil Substances 0.000 description 22
- 229910052751 metal Inorganic materials 0.000 description 6
- 239000002184 metal Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- ZRALSGWEFCBTJO-UHFFFAOYSA-N Guanidine Chemical compound NC(N)=N ZRALSGWEFCBTJO-UHFFFAOYSA-N 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003973 paint Substances 0.000 description 3
- XSQHUYDRSDBCHN-UHFFFAOYSA-N 2,3-dimethyl-2-propan-2-ylbutanenitrile Chemical compound CC(C)C(C)(C#N)C(C)C XSQHUYDRSDBCHN-UHFFFAOYSA-N 0.000 description 2
- CHJJGSNFBQVOTG-UHFFFAOYSA-N N-methyl-guanidine Natural products CNC(N)=N CHJJGSNFBQVOTG-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- SWSQBOPZIKWTGO-UHFFFAOYSA-N dimethylaminoamidine Natural products CN(C)C(N)=N SWSQBOPZIKWTGO-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- KUDUQBURMYMBIJ-UHFFFAOYSA-N 2-prop-2-enoyloxyethyl prop-2-enoate Chemical compound C=CC(=O)OCCOC(=O)C=C KUDUQBURMYMBIJ-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N Acrylic acid Chemical compound OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 229910052570 clay Inorganic materials 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 239000010705 motor oil Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000003566 sealing material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229910052623 talc Inorganic materials 0.000 description 1
- 239000000454 talc Substances 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
本発明はエンジンのクランクシャフトなどに用いられる
外周側嵌合式のオイルシールに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an outer peripheral side fitting type oil seal used for an engine crankshaft or the like.
［従来の構造］
従来、エンジンのクランクシャフトなどを密封するため
に用いられるオイルシールは、図面を基に詳述すると第
３図に示すように、ハウジング（１）の取付部分がアル
ミニウムからなるものが多く、このアルミニウム製ハウ
ジング（１）はオイルシール（Ａ′）を構成する金属製
の補強環（２）に比べ膨張係数が大きいため、該補強環
（２）の嵌合外周部を弾性体で被覆した外周側ゴム被覆
タイプのオイルシール（Ａ′）が一般に用いられている
。[Conventional Structure] Conventionally, an oil seal used to seal the crankshaft of an engine, etc., is one in which the mounting part of the housing (1) is made of aluminum, as shown in Figure 3 based on the drawing. Since this aluminum housing (1) has a larger coefficient of expansion than the metal reinforcing ring (2) that constitutes the oil seal (A'), the fitting outer periphery of the reinforcing ring (2) is covered with an elastic material. A rubber-coated type oil seal (A') on the outer peripheral side is generally used.
［発明が解決しようとする課題］
しかしながら、前記の外周側ゴム被覆タイプのオイルシ
ール（Ａ′）では、諸物性に優れ、るフッ素ゴムなどの
高価なゴム材を用いた場合その投入量の多さから大きな
コストがかかることと、ハウ３、発明の詳細な説明
ジンク（１）に対して外周側ゴム部分を圧入してその弾
性力によって前記熱膨張の差を吸収し圧入部からのオイ
ル漏れ及びオイルシール（Ａ′）の脱落を防止しようと
するためシャフト（６）に対して偏芯を伴い易くリップ
部（３１）を同心円上に設置し難いと云う大きな問題点
があった。[Problems to be Solved by the Invention] However, in the above-mentioned outer peripheral side rubber-covered type oil seal (A'), when an expensive rubber material such as fluororubber, which has excellent physical properties, is used, a large amount of rubber is used. Moreover, it requires a large cost, and how 3. Detailed Description of the Invention: The outer peripheral rubber portion is press-fitted into the zinc (1), and its elastic force absorbs the difference in thermal expansion, causing oil leakage from the press-fitted part. In order to prevent the oil seal (A') from falling off, there is a major problem in that it tends to be eccentric with respect to the shaft (6) and it is difficult to install the lip part (31) concentrically.
このため最近ではその圧入部分を金属部とし、該金属の
剛性によってアルミニウム製ハウジング（１）に嵌合固
定を図るといった方法が取られている。しかしながら、
このような単純に嵌合固定させた構造は、前記したよう
にアルミニウム製ハウジング（１）と金属製補強環（２
）の熱ｍ張係数に大きな差があるため高温領域ではハウ
ジング（１）と補強環（２）との間に隙間が生じ、該隙
間からオイルが滲み出すといった現象が起こる。For this reason, recently, a method has been adopted in which the press-fitted portion is made of a metal part and the rigidity of the metal is used to fit and fix it to the aluminum housing (1). however,
As mentioned above, this simply fitted and fixed structure consists of an aluminum housing (1) and a metal reinforcing ring (2).
) Since there is a large difference in the thermal tensile coefficients of the housing (1) and the reinforcing ring (2), a gap occurs between the housing (1) and the reinforcing ring (2) in a high temperature region, and oil oozes out from the gap.
そのため一部では補強環（２）の外周部にアクリル酸樹
脂などを塗布し、それによって圧入した際の隙間を埋め
ようとしているが、圧入する際にハウジング（１）の端
面にて塗料が掻き取られてしまうため該嵌合部からオイ
ル漏れを完全に防ぐには至っていない。For this reason, some attempts have been made to coat the outer periphery of the reinforcing ring (2) with acrylic acid resin or the like to fill the gap when press-fitting, but the paint may be scraped on the end face of the housing (1) during press-fitting. Since the oil is removed, oil leakage from the fitting portion cannot be completely prevented.
本発明はかかる問題点を解決することを目的として開発
されたものであって、高温下におけるアルミニウムハウ
ジング（１）の熱膨張にも十分に追随し圧入嵌合面から
のオイル漏れを引き起こさないオイルシールを提供する
ものである。The present invention was developed with the aim of solving such problems, and provides an oil that sufficiently follows the thermal expansion of the aluminum housing (1) under high temperatures and does not cause oil leakage from the press-fitting surface. It provides a seal.
Ｕ課題を解決するための手段］
本発明は、第１図に示すように、ハウジング（１）に嵌
合される金属製の補強環（２）へ弾性体製のシール部（
３）を形成したオイルシール（Ａ）であって、前記補強
環（２）の嵌合面であるラジアル方向周面（２１）に複
数の環状溝（４）を形成し、該環状溝（４）を含むラジ
アル方向周面（２１）にエチレンアクリル酸エステルを
主成分とするゴム弾性体（５）を溶剤にて溶解して塗布
せしめ、これを乾燥させた後、通常の成形方法によって
前記補強環（２）にリップ部（３１）を含むシール部（
３）を焼き付け形成しこれと同時に前記ゴム弾性体（５
）を架橋成形してなることを特徴としている。Means for Solving the Problem] As shown in FIG. 1, the present invention provides a seal portion (
3), in which a plurality of annular grooves (4) are formed on the radial circumferential surface (21), which is the fitting surface of the reinforcing ring (2), and the annular grooves (4) ) is coated with a rubber elastic body (5) containing ethylene acrylic acid ester as a main component by dissolving it in a solvent, and after drying, the reinforcement is applied by a normal molding method. A seal portion (including a lip portion (31) on the ring (2)
3) is baked and formed, and at the same time, the rubber elastic body (5) is formed by baking.
) is characterized by being formed by cross-linking molding.
［作用コ
オイルシール（Ａ）を圧入するとき、ラジアル方向周面
（２１）のゴム弾性体（５）が剥離しないこと及び連続
して密着していることが望まれ、そのために本発明では
補強環（２）の嵌合部であるラジアル方向周面（２１）
に複数の環状溝（４）を形成している。これは該ラジア
ル方向周面（２）が平坦であるとゴム弾性体（５）が圧
入の際にその多くを掻き取られシール材として有効に機
能しないため、該環状溝（４）内にゴム弾性体（５）そ
のものを保持してやることが必要となるがらであるや
ゴム弾性体（５）は、エチレンアクリル酸エステルを主
成分とするエラストマーに加硫剤及び充填材、顔料等を
含んだものを溶剤にて希釈したものからなり、加硫剤と
しては、グアニジン、ヘキサメチレンジアミンカルバメ
ートなどが用いられ、充填剤としては、カーボンブラッ
ク、ホワイトカーボン、クレー、タルクなどが用いられ
る。白色の充填剤のみを用いる場合には適宜顔料を添加
する。これらの添加剤をエラストマー１００部に対し、
充填剤０〜１００部、好ましくは３０〜６０部、加硫剤
として、グアニジン１〜５部、好ましくは３〜４部、ヘ
キサメチレンジアミンカルバメート１〜５部、好ましく
は１〜２部を混練したものをケトン、あるいはベンゼン
、トルエンなどの溶剤に溶解し塗布可能に調整する。[When press-fitting the working core oil seal (A), it is desired that the rubber elastic body (5) on the radial circumferential surface (21) does not peel off and remains in continuous contact with the rubber elastic body (5). Radial circumferential surface (21) that is the fitting part of the ring (2)
A plurality of annular grooves (4) are formed in the groove. This is because if the radial circumferential surface (2) is flat, most of the rubber elastic body (5) will be scraped off during press-fitting and will not function effectively as a sealing material. Although it is necessary to maintain the elastic body (5) itself, the rubber elastic body (5) is an elastomer whose main component is ethylene acrylic acid ester, and which contains a vulcanizing agent, a filler, a pigment, etc. guanidine, hexamethylene diamine carbamate, etc. are used as the vulcanizing agent, and carbon black, white carbon, clay, talc, etc. are used as the filler. When only a white filler is used, a pigment is added as appropriate. These additives per 100 parts of elastomer,
0 to 100 parts of filler, preferably 30 to 60 parts, 1 to 5 parts of guanidine, preferably 3 to 4 parts as a vulcanizing agent, and 1 to 5 parts of hexamethylene diamine carbamate, preferably 1 to 2 parts were kneaded. Dissolve the substance in a solvent such as ketone, benzene, toluene, etc. and prepare it so that it can be applied.
溶剤の量は塗布方法に応じた粘度特性を得るため一義的
には定まらないが、エラストマー１００に対し３００〜
５００ｇの量が望ましい。The amount of solvent cannot be determined unambiguously in order to obtain viscosity characteristics depending on the application method, but it is 300 to 100% of the elastomer.
A quantity of 500g is desirable.
以上のようにして調整されたゴム材料をデイスペンサー
あるいは刷毛体りにて補強環（２）のラジアル方向周面
（２１）に塗布し数時間の乾燥を行う、この補強環（２
）にはその後通常用いられる成形方法にてその内周部に
シール部（３〉が形成される。この際、前記エチレンア
クリル酸エステルを主成分とするゴム弾性体（５）も当
時に加硫されるため強固な被膜となってラジアル方向周
面（２１）に固定される。The rubber material prepared as described above is applied to the radial circumferential surface (21) of the reinforcing ring (2) using a dispenser or a brush body, and dried for several hours.
) is then formed with a seal portion (3) on its inner periphery using a commonly used molding method.At this time, the rubber elastic body (5) whose main component is ethylene acrylic ester is also vulcanized at that time. Therefore, it becomes a strong coating and is fixed to the radial circumferential surface (21).
［実施例コ
本発明のオイルシール（Ａ）を嵌合固定するに、前記ゴ
ム弾性体（５）の被膜自体はハウジング（１）に底金時
多くを削り取られるが、それでも環状溝（４）内及びそ
の近辺のゴム弾性体（５）は第２図に示すようにその環
状溝（４）内に○リング形状をもって残るものとなる。[Example] When the oil seal (A) of the present invention is fitted and fixed, much of the coating of the rubber elastic body (5) is scraped off by the bottom metal of the housing (1), but the annular groove (4) The rubber elastic body (5) in and around it remains in the annular groove (4) in the shape of a circle, as shown in FIG.
このとき、従来の塗料を用いて前記環状溝く４〉に塗料
を埋設したとしてもそれぞれの嵌合面に密着するシール
効果は多くを期待できないが、ところが本発明で用いた
エチレンアクリル酸エステルのエラストマーは１８０℃
の高温に耐え、しかもエンジンオイルなどに対して非常
に大きな膨潤を示すという特性を持っている。従って、
圧入嵌合面よりオイルが滲み出したとしても上記の特性
を発揮し、オイルが該ゴム弾性体（５）に接触した時点
から膨潤が始まりハウジング（１）とラジアル方向周面
（２）に対し完全に密着するＯリングを形成することと
なる。At this time, even if a conventional paint is used to bury the paint in the annular groove 4, it cannot be expected to have a good sealing effect on the respective mating surfaces. However, the ethylene acrylate used in the present invention Elastomer is 180℃
It has the property of being able to withstand high temperatures and exhibiting extremely large swelling when exposed to things like engine oil. Therefore,
Even if oil oozes out from the press-fitting surface, the above characteristics will be exhibited, and the oil will begin to swell from the moment it comes into contact with the rubber elastic body (5) and will cause damage to the housing (1) and the radial circumferential surface (2). This will form an O-ring that fits perfectly.
［発明の効果］
以上のように、本発明のオイルシール（Ａ）は金属製の
補強環（２）を嵌合に用いたことにより正確に強固な固
定が実現し、しかもゴム弾性体（５）によって熱的変化
を克服せしめ強力な密封性を得さしめな画期的なオイル
シールとなったものである。[Effects of the Invention] As described above, the oil seal (A) of the present invention achieves accurate and strong fixation by using the metal reinforcing ring (2) for fitting, and also has a rubber elastic body (5). ), it has become an epoch-making oil seal that overcomes thermal changes and achieves strong sealing performance.
第１図は本発明のオイルシールの一実施例を示した縦断
面図である。第２図は第１図のオイルシールが装着され
た状態を表した断面図である。第３図は従来のオイルシ
ールを示す断面図である。
Ａ・・・オイルシール、１・・・ハウジング、２・・・
補強環、２１・・・ラジアル方向周面、３・・・シール
部、４・・・環状溝、５・・・ゴム弾性体、６・・・シ
ャフト。FIG. 1 is a longitudinal sectional view showing an embodiment of the oil seal of the present invention. FIG. 2 is a sectional view showing a state in which the oil seal of FIG. 1 is installed. FIG. 3 is a sectional view showing a conventional oil seal. A...Oil seal, 1...Housing, 2...
Reinforcement ring, 21... Radial circumferential surface, 3... Seal portion, 4... Annular groove, 5... Rubber elastic body, 6... Shaft.
Claims (1)
弾性体製のシール部（３）を形成したオイルシール（Ａ
）において、前記補強環（２）の嵌合面のラジアル方向
周面（２１）に複数の環状溝（４）を形成し、該環状溝
（４）を含む前記ラジアル方向周面（２１）にエチレン
アクリル酸エステルを主成分とするゴム弾性体（５）を
溶剤にて溶解して塗布せしめ、これを乾燥させた後、通
常の成形方法によって前記補強環（２）にシール部（３
）を焼き付け形成しこれと同時に前記ゴム弾性体（５）
を架橋成形してなることを特徴としたオイルシール。The oil seal (A
), a plurality of annular grooves (4) are formed in the radial circumferential surface (21) of the fitting surface of the reinforcing ring (2), and the radial circumferential surface (21) including the annular grooves (4) is provided with a plurality of annular grooves (4). A rubber elastic body (5) containing ethylene acrylic acid ester as a main component is dissolved in a solvent and applied, and after drying, a seal portion (3) is formed on the reinforcing ring (2) using a normal molding method.
) is formed by baking, and at the same time the rubber elastic body (5) is formed.
An oil seal characterized by being formed by cross-linking molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221680A JPH04102769A (en) | 1990-08-22 | 1990-08-22 | Oil seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2221680A JPH04102769A (en) | 1990-08-22 | 1990-08-22 | Oil seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04102769A true JPH04102769A (en) | 1992-04-03 |
Family
ID=16770594
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2221680A Pending JPH04102769A (en) | 1990-08-22 | 1990-08-22 | Oil seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04102769A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004097234A1 (en) * | 2003-05-02 | 2004-11-11 | Komatsu Ltd. | Bearing seal and swing device |
| CN100439734C (en) * | 2003-05-02 | 2008-12-03 | 株式会社小松制作所 | Bearing seal and swing device |
| US9522454B2 (en) | 2012-12-17 | 2016-12-20 | Seagate Technology Llc | Method of patterning a lapping plate, and patterned lapping plates |
| JP2020176673A (en) * | 2019-04-17 | 2020-10-29 | ナブテスコ株式会社 | Seal structure and seal |
-
1990
- 1990-08-22 JP JP2221680A patent/JPH04102769A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004097234A1 (en) * | 2003-05-02 | 2004-11-11 | Komatsu Ltd. | Bearing seal and swing device |
| GB2416815A (en) * | 2003-05-02 | 2006-02-08 | Komatsu Mfg Co Ltd | Bearing seal and swing device |
| JPWO2004097234A1 (en) * | 2003-05-02 | 2006-07-13 | 株式会社小松製作所 | Bearing seal and rotation device |
| GB2416815B (en) * | 2003-05-02 | 2007-02-28 | Komatsu Mfg Co Ltd | Bearing seal and swing device |
| CN100439734C (en) * | 2003-05-02 | 2008-12-03 | 株式会社小松制作所 | Bearing seal and swing device |
| US7513690B2 (en) | 2003-05-02 | 2009-04-07 | Komatsu Ltd. | Bearing seal and swing device |
| US7748907B2 (en) | 2003-05-02 | 2010-07-06 | Komatsu Ltd. | Bearing seal and swing device |
| US7914209B2 (en) | 2003-05-02 | 2011-03-29 | Komatsu Ltd. | Bearing seal and swing device |
| JP4918258B2 (en) * | 2003-05-02 | 2012-04-18 | 株式会社小松製作所 | Bearing seal and rotating device |
| US9522454B2 (en) | 2012-12-17 | 2016-12-20 | Seagate Technology Llc | Method of patterning a lapping plate, and patterned lapping plates |
| JP2020176673A (en) * | 2019-04-17 | 2020-10-29 | ナブテスコ株式会社 | Seal structure and seal |
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