JP2007127157A - Sealed rolling bearing - Google Patents
Sealed rolling bearing Download PDFInfo
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- JP2007127157A JP2007127157A JP2005318442A JP2005318442A JP2007127157A JP 2007127157 A JP2007127157 A JP 2007127157A JP 2005318442 A JP2005318442 A JP 2005318442A JP 2005318442 A JP2005318442 A JP 2005318442A JP 2007127157 A JP2007127157 A JP 2007127157A
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- Prior art keywords
- rolling bearing
- sealed
- bearing
- film
- resin
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/583—Details of specific parts of races
- F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/62—Selection of substances
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
- F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
- F16C2240/60—Thickness, e.g. thickness of coatings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C2326/00—Articles relating to transporting
- F16C2326/01—Parts of vehicles in general
- F16C2326/06—Drive shafts
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/72—Sealings
- F16C33/76—Sealings of ball or roller bearings
- F16C33/80—Labyrinth sealings
- F16C33/805—Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
- Sealing Of Bearings (AREA)
Abstract
Description
本発明は、内輪と外輪の間の軸受空間を接触シールで密封し、内輪回転で使用される密封型転がり軸受に関する。 The present invention relates to a sealed type rolling bearing that is used in inner ring rotation by sealing a bearing space between an inner ring and an outer ring with a contact seal.
車両の床下部位でプロペラシャフトやドライブシャフト等に連結される車両用等速ジョイントのサポート用軸受のように、水や泥水が飛散する環境で使用される転がり軸受には、これらの水や泥水が内輪と外輪の間の軸受空間へ侵入するのを防止するために、接触シールで軸受空間を密封した密封型転がり軸受が用いられている。接触シールは、ゴム等の弾性部材で形成されたリップを内輪や外輪のシール摺接面と接触させて、軸受空間を密封するものである。 Rolling bearings used in an environment where water or muddy water scatters, such as support bearings for constant velocity joints for vehicles that are connected to propeller shafts, drive shafts, etc. under the floor of the vehicle, have these water and muddy water. In order to prevent entry into the bearing space between the inner ring and the outer ring, a sealed type rolling bearing in which the bearing space is sealed with a contact seal is used. The contact seal seals the bearing space by bringing a lip formed of an elastic member such as rubber into contact with a seal sliding contact surface of an inner ring or an outer ring.
この種の密封型転がり軸受には、軸受空間の両側に1枚ずつの接触シールを装着したものや(例えば、特許文献1参照)、これらの1枚ずつ装着した接触シールの外側に、さらに非接触のシールドを装着したものがある(例えば、特許文献2参照)。また、本出願人は、軸受空間を内外2枚の接触シールで密封した密封型転がり軸受も提案している(特願2005−29116)。 This type of sealed-type rolling bearing is provided with one contact seal on each side of the bearing space (see, for example, Patent Document 1), or on the outside of the contact seals installed one by one. Some have a contact shield (see, for example, Patent Document 2). The applicant has also proposed a hermetic rolling bearing in which the bearing space is sealed with two contact seals (in Japanese Patent Application No. 2005-29116).
上述した水や泥水が飛散する環境で使用される密封型転がり軸受で、内輪回転で使用されるものでは、ブラケット等に内嵌固定される外輪の外径面に錆が発生する。このように外輪の外径面に錆が発生すると、例えば、前記車両用等速ジョイントのサポート用軸受のように、ブラケット等から軸受を取り外す必要があるものでは、外輪が錆でブラケット等と固着し、軸受の取り外しができなくなる問題がある。 In the above-described sealed type rolling bearing used in an environment where water or muddy water scatters and used in inner ring rotation, rust is generated on the outer diameter surface of the outer ring that is fitted and fixed to a bracket or the like. When rust occurs on the outer diameter surface of the outer ring in this way, for example, in the case where the bearing needs to be removed from the bracket or the like, such as the support bearing for the constant velocity joint for the vehicle, the outer ring is fixed to the bracket or the like with rust. However, there is a problem that the bearing cannot be removed.
なお、一般的な軸受の防錆手段としては、軸受部品の表面に化成処理皮膜を形成し、この化成処理皮膜に防錆剤含浸処理や樹脂含浸処理を施す方法(特開2002−294465号公報)や、軸受部品の表面に防錆グリースを塗布する方法(特開2003−239090号公報)が提案されている。しかしながら、これらの方法は、初期の使用における錆の発生は防止できるが、軸受をブラケット等から着脱してメンテナンスする際に、化成処理皮膜が剥がれたり、グリース皮膜がなくなったりするので、長期間の使用に耐えることができない。 Incidentally, as a general bearing rust preventive means, a chemical conversion treatment film is formed on the surface of a bearing component, and this chemical conversion treatment film is subjected to a rust inhibitor impregnation treatment or a resin impregnation treatment (Japanese Patent Laid-Open No. 2002-294465). ) And a method of applying a rust preventive grease to the surface of a bearing component (Japanese Patent Laid-Open No. 2003-239090) has been proposed. However, these methods can prevent the occurrence of rust in the initial use, but when the bearing is removed from the bracket or the like for maintenance, the chemical conversion film may be peeled off or the grease film may be lost. Cannot withstand use.
そこで、本発明の課題は、水や泥水による外輪の外径面での錆の発生を長期間に亘ってなくし、外輪の軸受収納部への固着を防止することである。 Accordingly, an object of the present invention is to eliminate the occurrence of rust on the outer diameter surface of the outer ring due to water or muddy water for a long period of time, and to prevent the outer ring from sticking to the bearing housing portion.
上記の課題を解決するために、本発明は、内輪と外輪の間の軸受空間を接触シールで密封し、内輪回転で使用される密封型転がり軸受において、前記外輪の外径面をゴムまたは樹脂の皮膜で覆い、この皮膜の厚みを0.5〜1.5mmとした構成を採用した。 In order to solve the above-described problems, the present invention provides a sealed rolling bearing used for rotating an inner ring in which a bearing space between an inner ring and an outer ring is sealed with a contact seal, and an outer diameter surface of the outer ring is made of rubber or resin. The film was covered with a film having a thickness of 0.5 to 1.5 mm.
すなわち、外輪の外径面をゴムまたは樹脂の皮膜で覆い、この皮膜の厚みを0.5〜1.5mmとすることにより、水や泥水による外輪の外径面での錆の発生を長期間に亘ってなくし、外輪のブラケット等への固着を防止できるようにした。皮膜の厚みを0.5〜1.5mmとしたのは、厚みが0.5mm未満では、軸受をブラケット等へ着脱する際に皮膜が破れる恐れがあり、厚みが1.5mmを超えると、ブラケット等への固定が不安定になるからである。 That is, by covering the outer diameter surface of the outer ring with a rubber or resin film and setting the thickness of this film to 0.5 to 1.5 mm, the generation of rust on the outer diameter surface of the outer ring due to water or muddy water is prolonged. This prevents the outer ring from sticking to the bracket or the like. If the thickness is less than 0.5 mm, the coating may be broken when the bearing is attached to or detached from the bracket or the like. If the thickness exceeds 1.5 mm, the bracket This is because the fixation to etc. becomes unstable.
前記皮膜の硬さをデュロメータ硬さタイプAで80以上とすることにより、皮膜の強度を十分に確保できるとともに、軸受をより安定してブラケット等に固定することができる。 By setting the hardness of the coating to 80 or more with durometer hardness type A, the strength of the coating can be sufficiently secured, and the bearing can be more stably fixed to a bracket or the like.
前記皮膜は、ニトリルゴム、アクリルゴム、フッ素ゴム、エチレンプロピレンジエンターポリマのいずれかのゴム、またはポリアミド樹脂、ポリフェニレンスルフィド樹脂、ポリフタルアミド樹脂、ポリエーテルエーテルケトン樹脂のいずれかの樹脂で形成することができる。 The film is formed of any one of nitrile rubber, acrylic rubber, fluoro rubber, ethylene propylene diene polymer, or polyamide resin, polyphenylene sulfide resin, polyphthalamide resin, polyether ether ketone resin. be able to.
上述した各密封型転がり軸受は、車両用等速ジョイントのサポート用軸受に好適である。 Each of the above-described sealed rolling bearings is suitable as a support bearing for a constant velocity joint for a vehicle.
本発明の密封型転がり軸受は、外輪の外径面をゴムまたは樹脂の皮膜で覆い、この皮膜の厚みを0.5〜1.5mmとしたので、水や泥水による外輪の外径面での錆の発生を長期間に亘ってなくし、外輪のブラケット等への固着を防止することができる。 In the sealed type rolling bearing of the present invention, the outer diameter surface of the outer ring is covered with a rubber or resin film, and the thickness of this film is set to 0.5 to 1.5 mm. The generation of rust can be eliminated over a long period of time, and adhesion of the outer ring to the bracket or the like can be prevented.
前記皮膜の硬さをデュロメータ硬さタイプAで80以上とすることにより、皮膜の強度を十分に確保できるとともに、軸受をより安定してブラケット等に固定することができる。 By setting the hardness of the coating to 80 or more with durometer hardness type A, the strength of the coating can be sufficiently secured, and the bearing can be more stably fixed to a bracket or the like.
以下、図面に基づき、本発明の実施形態を説明する。この密封型転がり軸受は、図1に示すように、内輪2と外輪3の間でボール4が保持器5に保持された軸受空間の両側を、内側の接触シール6と外側のシールド7で密封した玉軸受1であり、外輪3の外径面がニトリルゴムの皮膜8で覆われている。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. As shown in FIG. 1, this sealed rolling bearing seals both sides of the bearing space where the
前記接触シール6は芯金部6aとゴム部6bとから成り、外輪3の内径面に固定されて、ゴム部6bに設けられた内外2枚のリップ6cが内輪2の外径面に摺接するようになっている。また、金属板で形成されたシールド7は内輪2の外径面に固定されている。
The
前記皮膜8は、外輪3の外径面と対向させた金型との間に液状のニトリルゴムを流し込むことにより成形されたものであり、その厚みが0.5〜1.5mm、硬さがデュロメータ硬さタイプAで80以上とされている。なお、皮膜8を樹脂で形成する場合は、外輪3の外径面と対向させた金型との間に樹脂を射出成形するとよい。
The
図2は、上述した玉軸受1を車両用等速ジョイントのサポート用軸受として使用した状態を示す。この玉軸受1は、外輪3が車両の床下部位に固定されるブラケット11に内嵌され、トランスミッションと等速ジョイント(図示省略)を連結する中間軸12を支持して、等速ジョイントをサポートするようになっている。等速ジョイントには車輪が連結される。この外輪3の外径面はゴムの皮膜8で覆われているので、水や泥水が飛散しても長期間錆が発生することはなく、外輪3がブラケット11に固着することはない。
FIG. 2 shows a state in which the above-described ball bearing 1 is used as a support bearing for a constant velocity joint for a vehicle. The ball bearing 1 is fitted in a
上述した実施形態では、外輪の外径面の皮膜をニトリルゴムで形成したが、この皮膜は、アクリルゴム、フッ素ゴム、エチレンプロピレンジエンターポリマ等の他のゴムや、ポリアミド樹脂、ポリフェニレンスルフィド樹脂、ポリフタルアミド樹脂、ポリエーテルエーテルケトン樹脂等の樹脂で形成することもできる。これらのゴムや樹脂にグラスファイバやカーボンファイバ等の添加剤を添加することもできる。 In the embodiment described above, the outer diameter surface film of the outer ring is formed of nitrile rubber, but this film is made of other rubber such as acrylic rubber, fluorine rubber, ethylene propylene diene terpolymer, polyamide resin, polyphenylene sulfide resin, It can also be formed of a resin such as a polyphthalamide resin or a polyether ether ketone resin. Additives such as glass fiber and carbon fiber can be added to these rubbers and resins.
また、上述した実施形態では、密封型転がり軸受を玉軸受とし、その軸受空間を接触シールとシールドで密封したが、本発明に係る密封型転がり軸受は、ころ軸受等の他の種類の転がり軸受にも適用することができ、軸受空間の密封形式も実施形態のものに限定されることはない。 In the above-described embodiment, the sealed rolling bearing is a ball bearing and the bearing space is sealed with a contact seal and a shield. However, the sealed rolling bearing according to the present invention is another type of rolling bearing such as a roller bearing. The sealing type of the bearing space is not limited to that of the embodiment.
1 玉軸受
2 内輪
3 外輪
4 ボール
5 保持器
6 接触シール
6a 芯金部
6b ゴム部
6c リップ
7 シールド
8 皮膜
11 ブラケット
12 中間軸
DESCRIPTION OF
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005318442A JP2007127157A (en) | 2005-11-01 | 2005-11-01 | Sealed rolling bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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JP2005318442A JP2007127157A (en) | 2005-11-01 | 2005-11-01 | Sealed rolling bearing |
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JP2007127157A true JP2007127157A (en) | 2007-05-24 |
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JP2005318442A Pending JP2007127157A (en) | 2005-11-01 | 2005-11-01 | Sealed rolling bearing |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2009155938A1 (en) * | 2008-06-23 | 2009-12-30 | Ab Skf | A bearing component |
WO2011060041A2 (en) * | 2009-11-13 | 2011-05-19 | Entemerson Power Transmission Corporation | External bearing shroud |
JP2013160280A (en) * | 2012-02-03 | 2013-08-19 | Ntn Corp | Sealed rolling bearing |
US20220355615A1 (en) * | 2021-05-07 | 2022-11-10 | Aktiebolaget Skf | Secondary sealing device for wheel bearing assemblies |
-
2005
- 2005-11-01 JP JP2005318442A patent/JP2007127157A/en active Pending
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8333515B2 (en) | 2006-06-30 | 2012-12-18 | Emerson Power Transmission Corporation | External bearing shroud |
WO2009155938A1 (en) * | 2008-06-23 | 2009-12-30 | Ab Skf | A bearing component |
WO2011060041A2 (en) * | 2009-11-13 | 2011-05-19 | Entemerson Power Transmission Corporation | External bearing shroud |
WO2011060041A3 (en) * | 2009-11-13 | 2011-09-29 | Entemerson Power Transmission Corporation | External bearing shroud |
JP2013160280A (en) * | 2012-02-03 | 2013-08-19 | Ntn Corp | Sealed rolling bearing |
US20220355615A1 (en) * | 2021-05-07 | 2022-11-10 | Aktiebolaget Skf | Secondary sealing device for wheel bearing assemblies |
US11668348B2 (en) * | 2021-05-07 | 2023-06-06 | Aktiebolaget Skf | Secondary sealing device for wheel bearing assemblies |
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