JP2010169138A - Rolling bearing sealing seal - Google Patents

Rolling bearing sealing seal Download PDF

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Publication number
JP2010169138A
JP2010169138A JP2009010773A JP2009010773A JP2010169138A JP 2010169138 A JP2010169138 A JP 2010169138A JP 2009010773 A JP2009010773 A JP 2009010773A JP 2009010773 A JP2009010773 A JP 2009010773A JP 2010169138 A JP2010169138 A JP 2010169138A
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Prior art keywords
seal
rolling bearing
seal lip
sealing
outer diameter
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Japanese (ja)
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Yuma Takeya
侑馬 竹谷
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JTEKT Corp
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JTEKT Corp
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Priority to JP2009010773A priority Critical patent/JP2010169138A/en
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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
    • 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
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7816—Details of the sealing or parts thereof, e.g. geometry, material
    • F16C33/782—Details of the sealing or parts thereof, e.g. geometry, material of the sealing region
    • 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
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7886—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted outside the gap between the inner and outer races, e.g. sealing rings mounted to an end face or outer surface of a race
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such
    • F16D23/14—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings
    • F16D23/142—Clutch-actuating sleeves or bearings; Actuating members directly connected to clutch-actuating sleeves or bearings with a resilient member acting radially between the bearing and its guide means
    • 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
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • 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
    • F16C2361/00—Apparatus or articles in engineering in general
    • F16C2361/43—Clutches, e.g. disengaging bearing
    • 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
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D2300/00—Special features for couplings or clutches
    • F16D2300/08—Details or arrangements of sealings not provided for in group F16D3/84

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Operated Clutches (AREA)
  • Sealing Of Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing sealing seal for extending the sealing and water-proofing life of a rolling bearing by suppressing the deformation of a seal lip to maintain the performance of sealing the rolling bearing. <P>SOLUTION: At the inner peripheral edge of the rolling bearing sealing seal 10 to be fixed to an outer ring 30, the seal lip 20 is formed to slide contact the outer diameter face of an inner ring 40. The seal 10 has a protruded portion 22 formed on the seal lip 20 at its radially outward position to suppress the deformation of the seal lip 20 to its outer diameter side. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は転がり軸受密封用のシールに関する。具体的には、外輪に固定される転がり軸受密封用のシールに関する。   The present invention relates to a seal for sealing a rolling bearing. Specifically, the present invention relates to a seal for sealing a rolling bearing fixed to an outer ring.

自動車のエンジンとトランスミッションとの間に配設されるクラッチ装置にはクラッチレリーズ軸受が組み込まれている。このクラッチレリーズ軸受には、クラッチ機構の回転部材と接触して外輪が回転する外輪回転・内輪固定のタイプのものと、クラッチ機構の回転部材と接触して内輪が回転する外輪固定・内輪回転のタイプのものがある。
このクラッチレリーズ軸受の内部に水等が入ってしまうと、軸受内部に封入されたグリース等の潤滑油が劣化し、軸受内部に錆が発生して、軸受の寿命低下を引き起こす。
そこで、クラッチレリーズ軸受には、軸線方向の両端において、内輪又は外輪のいずれか一方に固定され他方に接触または非接触とされた軸受密封用のシールを内輪と外輪の間に配置しているものがある。 A clutch release bearing is incorporated in a clutch device disposed between an automobile engine and a transmission. The clutch release bearing includes an outer ring rotating / inner ring fixing type in which the outer ring rotates by contacting with the rotating member of the clutch mechanism, and an outer ring fixing / inner ring rotating in which the inner ring rotates by contacting with the rotating member of the clutch mechanism. There are types.
If water or the like enters the inside of the clutch release bearing, the lubricating oil such as grease enclosed in the bearing is deteriorated, and rust is generated inside the bearing, thereby reducing the life of the bearing.
Therefore, in the clutch release bearing, at both ends in the axial direction, a bearing sealing seal that is fixed to either the inner ring or the outer ring and is in contact with or not in contact with the other is disposed between the inner ring and the outer ring. There is.

先行技術文献として、特開２００６−１８９０８６号公報（特許文献１）には、外輪回転・内輪固定のクラッチレリーズ軸受の密封用のシールが記載されている。特許文献１に記載のクラッチレリーズ軸受では、クラッチ機構の回転部材が配設されるフロント側には内輪に固定され外輪に摺接するシール部材が配設されている。そして、軸線方向の反対側のリヤ側には外輪に固定され内輪に摺接するシール部材が配設されている。   As a prior art document, Japanese Patent Laying-Open No. 2006-189086 (Patent Document 1) describes a seal for sealing an outer ring rotating / inner ring fixed clutch release bearing. In the clutch release bearing described in Patent Document 1, a seal member fixed to the inner ring and slidably contacting the outer ring is disposed on the front side where the rotating member of the clutch mechanism is disposed. A seal member fixed to the outer ring and in sliding contact with the inner ring is disposed on the rear side opposite to the axial direction.

図４に、特許文献１に記載されたクラッチレリーズ軸受とほぼ同一の構成のクラッチレリーズ軸受１１０の部分断面図を示す。
クラッチレリーズ軸受１１０は、径方向内方に延びる凸状の円弧面を有する鍔部１２２が形成された外輪１２０と、径方向内方に延びる平坦状の鍔部１３２が形成された内輪１３０と、この内輪１３０と外輪１２０との間に転動自在に収容された複数の転動体１１４を備え、クラッチ機構の回転部材１１２と外輪１２０の鍔部１２２との接触により外輪１２０が回転するタイプのクラッチレリーズ軸受である。
そして、フロント側には内輪１３０の鍔部１３２の側面にシール１５０が配設され、シール１５０に一体的に接合されたサイドリップ１５２が、外輪１２０の鍔部１２２に摺接する構成とされている。そして、リア側には、外輪１２０の内周面に内嵌めされた状態でシール１４０が配設され、シール１４０の先端に形成されたシールリップ１４２が内輪１３０の外径面に摺接する構成とされている。よって、クラッチレリーズ軸受１１０は、潤滑油が漏れにくく泥水が侵入しにくい構造であるため、良好な潤滑性と耐水性を維持できると考えられる。 FIG. 4 is a partial cross-sectional view of a clutch release bearing 110 having substantially the same configuration as the clutch release bearing described in Patent Document 1.
The clutch release bearing 110 includes an outer ring 120 formed with a flange 122 having a convex arc surface extending radially inward, an inner ring 130 formed with a flat flange 132 extending radially inward, A clutch of a type that includes a plurality of rolling elements 114 that are rotatably accommodated between the inner ring 130 and the outer ring 120, and the outer ring 120 rotates by contact between the rotating member 112 of the clutch mechanism and the flange 122 of the outer ring 120. Release bearing.
A seal 150 is disposed on the side of the flange 132 of the inner ring 130 on the front side, and a side lip 152 integrally joined to the seal 150 is in sliding contact with the flange 122 of the outer ring 120. . On the rear side, a seal 140 is disposed in a state of being fitted to the inner peripheral surface of the outer ring 120, and a seal lip 142 formed at the tip of the seal 140 is in sliding contact with the outer diameter surface of the inner ring 130. Has been. Therefore, since the clutch release bearing 110 has a structure in which lubricating oil does not easily leak and muddy water does not easily enter, it is considered that good lubricity and water resistance can be maintained.

特開２００６−１８９０８６号公報JP 2006-189086 A

しかしながら、クラッチレリーズ軸受には低トルク化の要請がある。また、接触タイプの密封構造では、摩擦による発熱がグリース等の潤滑油の劣化の原因となる。そこで、フロント側のシールについては、シールを外輪と非接触の近接状態としてラビリンスを形成するか、あるいは軽接触とすることで、低トルク化を図っている。
一方、リア側については、シールが外輪と共に回転し、シールリップに遠心力が作用する構成とされているこの構成において、低トルク化のためシールリップを内輪の外径面に対して軽接触とすると、長期間、高温・高速で使用するとシールリップが変形して締め代が減少してしまうおそれがある。
そして、雨の日や、水たまりのある悪路で、クラッチハウジングに大量の泥水がかかり、クラッチハウジング内に泥水が入ると、泥水はフライホイールでかき上げられて、クラッチレリーズ軸受のリア側に達する。そして、クラッチレリーズ軸受のリア側で泥水が外輪と内輪の隙間に入り込んだ場合には、シールリップの締め代が無いか又は締め代が小さいと、泥水は内輪とシールリップの間から軸受内部に侵入して、グリース等の潤滑油を劣化させ、軸受の寿命を低下させる。
このシールリップが変形してシールリップによる締め代が減少するという問題は、外輪回転・内輪固定のクラッチレリーズ軸受の密封用に使用されるシールに限られない。外輪固定・内輪回転の軸受に使用されるシールの場合はシールリップに回転による遠心力が働くことはないが、長期間にわたり高温・高速で使用すると、発熱や振動でシールリップが変形して締め代が減少することがある。 However, there is a demand for lower torque in the clutch release bearing. Further, in the contact type sealing structure, heat generated by friction causes deterioration of lubricating oil such as grease. Therefore, the front side seal is designed to reduce torque by forming a labyrinth in a non-contact proximity state with the outer ring or by making a light contact.
On the other hand, on the rear side, in this configuration in which the seal rotates with the outer ring and centrifugal force acts on the seal lip, the seal lip is lightly contacted with the outer diameter surface of the inner ring to reduce torque. Then, when used at a high temperature and high speed for a long period of time, the seal lip may be deformed and the tightening allowance may be reduced.
Then, on a rainy day or a rough road with puddles, a large amount of muddy water is applied to the clutch housing. When muddy water enters the clutch housing, the muddy water is lifted up by the flywheel and reaches the rear side of the clutch release bearing. . When muddy water enters the gap between the outer ring and the inner ring on the rear side of the clutch release bearing, the muddy water enters between the inner ring and the seal lip from the inside of the bearing if there is no allowance for the seal lip. Penetrates and degrades lubricating oil such as grease and shortens bearing life.
The problem that the seal lip is deformed to reduce the tightening allowance by the seal lip is not limited to the seal used for sealing the outer ring rotation / inner ring fixed clutch release bearing. In the case of seals used for outer ring fixed and inner ring rotating bearings, centrifugal force due to rotation does not act on the seal lip, but if used at high temperature and high speed for a long time, the seal lip will be deformed and tightened due to heat generation and vibration. The bill may decrease.

そこで、本発明が解決しようとする課題は、シールリップの変形を抑制して転がり軸受の密封性能を維持し、転がり軸受の密封性、耐水性の寿命を延長することができる転がり軸受密封用のシールを提供することにある。   Therefore, the problem to be solved by the present invention is to maintain the sealing performance of the rolling bearing by suppressing the deformation of the seal lip, and to improve the sealing performance and water resistance life of the rolling bearing. It is to provide a seal.

上記課題を解決するため、本発明にかかる転がり軸受密封用のシールは次の手段をとる。
まず、本発明の第１の発明は、外輪に固定される転がり軸受密封用のシールであって、
前記シールの内周縁部には内輪または軸体の外径面に摺接するシールリップが形成されており、該シールには、該シールリップの径方向外方位置に、該シールリップの外径側への変形を抑制するストッパが形成されていることを特徴とする。
この第１の発明によれば、シールリップの径方向外方位置に形成されたストッパによりシールリップの外径側への変形が抑制されるので、転がり軸受の密封性能を維持し、転がり軸受の密封性、耐水性の寿命を延長することができる。 In order to solve the above-mentioned problems, the seal for rolling bearing sealing according to the present invention takes the following means.
First, the first invention of the present invention is a seal for rolling bearing sealing fixed to the outer ring,
A seal lip is formed on the inner peripheral edge of the seal so as to be in sliding contact with the outer diameter surface of the inner ring or the shaft body. The seal lip is positioned on the outer diameter side of the seal lip at the radially outer position of the seal lip. The stopper which suppresses a deformation | transformation into is formed.
According to the first invention, the stopper formed at the radially outer position of the seal lip suppresses the deformation of the seal lip toward the outer diameter side. Therefore, the sealing performance of the rolling bearing is maintained, and the rolling bearing The service life of sealing and water resistance can be extended.

次に、本発明の第２の発明は、上記第１の発明に係る転がり軸受密封用のシールであって、前記シールが外輪と共に回転することを特徴とする。
この第２の発明によれば、シールリップに遠心力が働くため、シールリップが外径側へ変形し易いので、ストッパによりシールリップの外径側への変形を抑制する効果が高く、転がり軸受の密封性能を維持し、転がり軸受の密封性、耐水性の寿命を延長することができる。 Next, a second invention of the present invention is a seal for sealing a rolling bearing according to the first invention, wherein the seal rotates together with an outer ring.
According to the second aspect of the invention, since centrifugal force acts on the seal lip, the seal lip is easily deformed to the outer diameter side. Therefore, the stopper is highly effective in suppressing the deformation of the seal lip to the outer diameter side. The sealing performance of the rolling bearing can be maintained, and the sealing and water resistance life of the rolling bearing can be extended.

次に、本発明の第３の発明は、上記第１の発明または第２の発明に係る転がり軸受密封用のシールであって、前記ストッパは前記シールリップの径方向外方位置から、前記シールリップの外径側の側面に向かって突き出した凸状部であることを特徴とする。
この第３の発明によれば、シールリップが外径側に変形しようとすると、シールリップの径方向外方に形成された凸状部にシールリップの外径側側面が当接して、シールリップの外径側への変形が抑制される。よって、転がり軸受の密封性能を維持し、転がり軸受の密封性、耐水性の寿命を延長することができる。 Next, a third invention of the present invention is a seal for sealing a rolling bearing according to the first invention or the second invention, wherein the stopper is formed from the radially outer position of the seal lip and the seal. It is the convex part protruded toward the side surface by the side of the outer diameter of a lip, It is characterized by the above-mentioned.
According to the third aspect of the invention, when the seal lip is deformed to the outer diameter side, the outer diameter side surface of the seal lip comes into contact with the convex portion formed radially outward of the seal lip, and the seal lip The deformation to the outer diameter side is suppressed. Therefore, the sealing performance of the rolling bearing can be maintained, and the sealing performance and water resistance life of the rolling bearing can be extended.

上述の本発明の各発明によれば、次の効果が得られる。
まず、上述の第１の発明によれば、ストッパによりシールリップの外径側への変形が抑制されるので、転がり軸受の密封性、耐水性の寿命を延長することができる。
次に上述の第２の発明によれば、シールリップに遠心力が働くため、シールリップが外径側へ変形し易いので、ストッパによりシールリップの外径側への変形を抑制する効果が高く、、転がり軸受の密封性、耐水性の寿命を延長することができる。
次に上述の第３の発明によれば、シールリップが外径側に変形しようとすると、シールリップの径方向外方に形成された凸状部にシールリップの外径側側面が当接して、シールリップの外径側への変形が抑制される。よって、転がり軸受の密封性、耐水性の寿命を延長することができる。 According to each invention of the present invention described above, the following effects can be obtained.
First, according to the first invention described above, since the stopper suppresses deformation of the seal lip toward the outer diameter side, the sealing performance and water resistance life of the rolling bearing can be extended.
Next, according to the second aspect of the present invention, since the centrifugal lip acts on the seal lip, the seal lip is easily deformed to the outer diameter side. Therefore, the stopper is highly effective in suppressing the deformation of the seal lip to the outer diameter side. The life of the sealing and water resistance of the rolling bearing can be extended.
Next, according to the above-described third invention, when the seal lip is deformed to the outer diameter side, the outer diameter side surface of the seal lip comes into contact with the convex portion formed radially outward of the seal lip. The deformation of the seal lip to the outer diameter side is suppressed. Therefore, the sealing performance and water resistance life of the rolling bearing can be extended.

一実施例における転がり軸受密封用のシールを備えたクラッチレリーズ軸受の部分断面図である。It is a fragmentary sectional view of the clutch release bearing provided with the seal | sticker for rolling bearing sealing in one Example. 図１の転がり軸受密封用のシール部分の拡大図である。FIG. 2 is an enlarged view of a seal portion for sealing the rolling bearing of FIG. 1. 変形例のシールの外観斜視図である。It is an external appearance perspective view of the seal | sticker of a modification. 従来技術による転がり軸受密封用のシールを備えたクラッチレリーズ軸受の部分断面図である。It is a fragmentary sectional view of the clutch release bearing provided with the seal for rolling bearing sealing by a prior art.

以下、本発明を実施するための形態について実施例にしたがって説明する。
図１に本発明の一実施例における転がり軸受密封用のシール１０を備えたクラッチレリーズ軸受５０の部分断面図を示す。図１の左側がフロント側、右側がリア側である。図１に示すように、クラッチレリーズ軸受５０は外輪３０のフロント側に径方向内方にのびる鍔部３２が形成され、ダイヤフラムスプリング６０と外輪３０の鍔部３２との接触により外輪３０が回転するタイプのクラッチレリーズ軸受である。 Hereinafter, modes for carrying out the present invention will be described according to examples.
FIG. 1 shows a partial cross-sectional view of a clutch release bearing 50 provided with a seal 10 for sealing a rolling bearing in an embodiment of the present invention. The left side of FIG. 1 is the front side, and the right side is the rear side. As shown in FIG. 1, the clutch release bearing 50 has a flange portion 32 extending radially inward on the front side of the outer ring 30, and the outer ring 30 rotates by contact between the diaphragm spring 60 and the flange portion 32 of the outer ring 30. This is a type of clutch release bearing.

そして、外輪３０に対向して内方側には内輪４０が配設されており、この外輪３０と内輪４０との間には周方向に複数配列された転動体３４が保持器３６により転動可能に保持されている。なお、内輪４０の内周面側には自動調心用の弾性スリーブ４６が固着されて取り付けられている。そして、クラッチレリーズ軸受５０のフロント側では、弾性スリーブ４６からフロントシール４４が突設形成されており、フロントシール４４の二股に分岐した先端を外輪３０の鍔部３２の内側に摺接させて、外輪３０と内輪４０のフロント側の隙間を塞ぐ構成とされている。また、クラッチレリーズ軸受５０のリア側では、内輪４０の端部に径方向外方に延びる鍔部４２が形成され、内輪４０の鍔部４２の軸受内側に外輪３０の外径面に固定されたシール１０が配設されて、外輪３０と内輪４０のリア側の隙間を塞ぐ構成とされている。   An inner ring 40 is disposed on the inner side facing the outer ring 30, and a plurality of rolling elements 34 arranged in the circumferential direction are rolled between the outer ring 30 and the inner ring 40 by a cage 36. Held possible. A self-aligning elastic sleeve 46 is fixedly attached to the inner peripheral surface of the inner ring 40. A front seal 44 is formed to project from the elastic sleeve 46 on the front side of the clutch release bearing 50, and the front branching end of the front seal 44 is brought into sliding contact with the inside of the flange portion 32 of the outer ring 30, The front side gap between the outer ring 30 and the inner ring 40 is closed. Further, on the rear side of the clutch release bearing 50, a flange 42 extending radially outward is formed at the end of the inner ring 40, and is fixed to the outer diameter surface of the outer ring 30 inside the bearing of the flange 42 of the inner ring 40. The seal 10 is provided to close the gap on the rear side of the outer ring 30 and the inner ring 40.

図２にクラッチレリーズ軸受５０のシール１０が使用されている部分の拡大図を示す。シール１０は金属製の芯金の一部をゴムで覆った円環状の部材である。そして、図２に示すとおり、外輪３０の外径面にシール１０を外嵌め固定するための固定部１２と、内輪４０の鍔部４２に面する側壁部１４と、内輪４０の外径に摺接する構成とされたシールリップ２０とを備えている。そして、固定部１２は芯金が露出した構成とされ、側壁部１４は芯金をゴム製の被覆部で覆った構成とされ、シールリップ２０はゴムで構成されている。
そして、シール１０の側壁部１４の内径側端部の軸受外方側には、側壁部１４のゴム製の被覆部と一体成形され、シールリップ２０の外径側の側面に向かって突き出した凸状部２２が形成されている。凸状部２２はシール１０の側壁部１４の内径側端部の全周にわたって環状に形成されている。そして、凸状部２２の内径側の先端とシールリップ２０の外径側の側面は、シール１０をクラッチレリーズ軸受５０に取り付けた状態で僅かな隙間を有する構成とされている。この凸状部２２が本発明のストッパに相当する。
そして、シール１０の側壁部１４の径方向外方には、ゴム製の被覆部と一体形成され、内輪４０の鍔部４２の先端の径方向上部に突き出した突起部１６が形成されている。 FIG. 2 shows an enlarged view of a portion where the seal 10 of the clutch release bearing 50 is used. The seal 10 is an annular member in which a part of a metal core is covered with rubber. Then, as shown in FIG. 2, the fixing portion 12 for fitting and fixing the seal 10 to the outer diameter surface of the outer ring 30, the side wall portion 14 facing the flange portion 42 of the inner ring 40, and the outer diameter of the inner ring 40 are slid. The seal lip 20 is configured to be in contact with the seal lip 20. The fixing portion 12 has a configuration in which the core metal is exposed, the side wall portion 14 has a configuration in which the core metal is covered with a rubber coating portion, and the seal lip 20 is configured by rubber.
Further, on the bearing outer side of the inner diameter side end portion of the side wall portion 14 of the seal 10, a protrusion that is integrally formed with the rubber covering portion of the side wall portion 14 and protrudes toward the outer diameter side surface of the seal lip 20. A shaped portion 22 is formed. The convex portion 22 is formed in an annular shape over the entire circumference of the inner diameter side end portion of the side wall portion 14 of the seal 10. Then, the tip on the inner diameter side of the convex portion 22 and the side surface on the outer diameter side of the seal lip 20 are configured to have a slight gap when the seal 10 is attached to the clutch release bearing 50. The convex portion 22 corresponds to the stopper of the present invention.
Further, on the radially outer side of the side wall portion 14 of the seal 10, a protruding portion 16 is formed integrally with a rubber covering portion and protrudes to the upper portion in the radial direction at the tip of the flange portion 42 of the inner ring 40.

一実施例では、シール１０の凸状部２２を側壁部１４のゴム製の被覆部と一体成形としているが、凸状部２２に相当する形状を金属製あるいは樹脂製の円環状の別部品として形成し、シール１０の側壁部１４の内径側端部の軸受外方側に接着固定して凸状部２２とする構成としても良い。
なお、凸状部２２はシール１０の周方向の全周に連続して設ける必要はない。図３に、シールの側壁部の内径側端部に、シールの被覆部と一体とし周方向に柱状の凸状部２２Ａを並べた構成とした、変形例のシール１０Ａの突状部２２Ａ部分の外観斜視図を示す。シール１０Ａの他の構造はシール１０と同様としているので、同じ符号を付して説明は省略する。 In one embodiment, the convex portion 22 of the seal 10 is integrally formed with the rubber covering portion of the side wall portion 14, but the shape corresponding to the convex portion 22 is formed as a separate metal or resin annular part. It is good also as a structure which forms and forms the convex part 22 by adhering and fixing to the bearing outer side of the inner diameter side edge part of the side wall part 14 of the seal | sticker 10. FIG.
The convex portion 22 does not need to be continuously provided on the entire circumference of the seal 10 in the circumferential direction. FIG. 3 shows a projecting portion 22A portion of a seal 10A of a modified example in which a columnar convex portion 22A is arranged in a circumferential direction integrally with the seal covering portion at the inner diameter side end portion of the side wall portion of the seal. An external perspective view is shown. Since the other structure of the seal 10A is the same as that of the seal 10, the same reference numerals are given and description thereof is omitted.

一実施例によれば、シール１０の内径側先端に形成されたシールリップ２０が外径側に変形しようとすると、シールリップ２０の径方向外方となるシール１０の側壁部１４の内径側先端に形成された凸状部２２にシールリップ２０の外径側側面が当接して、シールリップ２０の外径側への変形が抑制される。よって、シール１０の密封性能の低下を防ぎ、シール１０が取り付けられた転がり軸受の密封性、耐水性を維持し、転がり軸受の寿命を延長することができる。
そして、シール１０の凸状部２２は突起物であって剛性が高い構成とすることが出来るため、シール１０に遠心力働く環境であっても凸状部２２はほとんど変形せず、凸状部２２によりシールリップ２０の外径側への変形を抑制することができる。そして、一実施例ではシール１０に遠心力が働く環境にあるためシールリップ２０が外径側に変形しやすいので、本発明の効果がより発揮される。 According to one embodiment, when the seal lip 20 formed at the inner diameter side tip of the seal 10 is deformed to the outer diameter side, the inner diameter side tip of the side wall portion 14 of the seal 10 that is radially outward of the seal lip 20. The side surface of the seal lip 20 on the outer diameter side abuts on the convex portion 22 formed on the inner surface of the lip portion 22 so that deformation of the seal lip 20 toward the outer diameter side is suppressed. Accordingly, it is possible to prevent the sealing performance of the seal 10 from being deteriorated, maintain the sealing performance and water resistance of the rolling bearing to which the seal 10 is attached, and extend the life of the rolling bearing.
And since the convex part 22 of the seal | sticker 10 is a protrusion and can be set as a structure with high rigidity, even if it is an environment where centrifugal force acts on the seal | sticker 10, the convex part 22 hardly deform | transforms, and convex part 22 can suppress deformation of the seal lip 20 toward the outer diameter side. And in one Example, since it exists in the environment where a centrifugal force acts on the seal | sticker 10, since the seal lip 20 is easy to deform | transform to the outer-diameter side, the effect of this invention is exhibited more.

一実施例ではシールが外輪と共に回転する例を示したが、本発明に係る転がり軸受密封用のシールは、外輪固定・内輪回転の軸受の密封用にも適用することが出来る。内輪回転タイプの軸受ではシールリップに遠心力が働くことはないが、シールが長期間にわたり高温・高速で使用されると、発熱や振動でシールリップが外径側に変形してシールリップによる密封性能が低下することがある。そこで、シールリップの外径側に形成されたストッパが、シールリップの外径側への変形を抑制する働きをする。
また、一実施例ではクラッチレリーズ軸受について、シールリップが内輪の外径面に摺接する例を示したが、本発明に係るシールにより密封することができる転がり軸受の種類はクラッチレリーズ軸受に限られない。また、本発明に係るシールは、シールリップが軸体の外径面に摺接する構成の軸受に対しても適用することができる。
その他、本発明に係る転がり軸受密封用のシールはその発明の思想の範囲で、各種の形態で実施できるものである。 In one embodiment, the seal rotates with the outer ring. However, the seal for sealing the rolling bearing according to the present invention can also be applied to seal the bearing for fixing the outer ring and rotating the inner ring. In the inner ring rotating type bearing, centrifugal force does not act on the seal lip, but if the seal is used at high temperature and high speed for a long period of time, the seal lip deforms to the outer diameter side due to heat generation or vibration and seals with the seal lip Performance may be reduced. Therefore, a stopper formed on the outer diameter side of the seal lip functions to suppress deformation of the seal lip toward the outer diameter side.
In the embodiment, the clutch release bearing is shown in which the seal lip is in sliding contact with the outer diameter surface of the inner ring. However, the type of the rolling bearing that can be sealed by the seal according to the present invention is limited to the clutch release bearing. Absent. The seal according to the present invention can also be applied to a bearing having a configuration in which the seal lip is in sliding contact with the outer diameter surface of the shaft body.
In addition, the seal for rolling bearing sealing according to the present invention can be implemented in various forms within the scope of the idea of the invention.

１０、１０Ａ シール
１２ 固定部
１４ 側壁部
１６ 突起部
２０ シールリップ
２２、２２Ａ 凸状部
３０ 外輪
３２ 鍔部
３４ 転動体
３６ 保持器
４０ 内輪
４２ 鍔部
４４ フロントシール
４６ 弾性スリーブ
５０ クラッチレリーズ軸受
６０ ダイヤフラムスプリング
10, 10A Seal 12 Fixing portion 14 Side wall portion 16 Protruding portion 20 Seal lip 22, 22A Convex portion 30 Outer ring 32 Hook 34 Rolling element 36 Cage 40 Inner ring 42 Hook 44 Front seal 46 Elastic sleeve 50 Clutch release bearing 60 Diaphragm spring

Claims (3)

外輪に固定される転がり軸受密封用のシールであって、
前記シールの内周縁部には内輪または軸体の外径面に摺接するシールリップが形成されており、該シールには、該シールリップの径方向外方位置に、該シールリップの外径側への変形を抑制するストッパが形成されていることを特徴とする転がり軸受密封用のシール。 A seal for sealing a rolling bearing fixed to the outer ring,
A seal lip is formed on the inner peripheral edge of the seal so as to be in sliding contact with the outer diameter surface of the inner ring or the shaft body. The seal lip is positioned on the outer diameter side of the seal lip at the radially outer position of the seal lip. A stopper for sealing a rolling bearing, characterized in that a stopper for suppressing deformation of the roller bearing is formed. 請求項１に記載の転がり軸受密封用のシールであって、
前記シールが外輪と共に回転することを特徴とする転がり軸受密封用のシール。 It is a seal for rolling bearing sealing according to claim 1,
A seal for sealing a rolling bearing, wherein the seal rotates together with an outer ring. 請求項１または請求項２に記載の転がり軸受密封用のシールであって、
前記ストッパは前記シールリップの径方向外方位置から、前記シールリップの外径側の側面に向かって突き出した凸状部であることを特徴とする転がり軸受密封用のシール。
A seal for sealing a rolling bearing according to claim 1 or 2,
The stopper for sealing a rolling bearing, characterized in that the stopper is a convex portion protruding from a radially outer position of the seal lip toward a side surface on the outer diameter side of the seal lip.
JP2009010773A 2009-01-21 2009-01-21 Rolling bearing sealing seal Pending JP2010169138A (en)

Priority Applications (1)

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Publications (1)

Publication Number Publication Date
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ID=42701485

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614630U (en) * 1992-07-30 1994-02-25 キーパー株式会社 Oil seal
JPH0681858U (en) * 1993-05-10 1994-11-22 光洋精工株式会社 Bearing device for railway vehicles
JPH07332377A (en) * 1994-06-01 1995-12-22 Mutsubishi Gomme Kk Bearing part sealing device for rotary shaft

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0614630U (en) * 1992-07-30 1994-02-25 キーパー株式会社 Oil seal
JPH0681858U (en) * 1993-05-10 1994-11-22 光洋精工株式会社 Bearing device for railway vehicles
JPH07332377A (en) * 1994-06-01 1995-12-22 Mutsubishi Gomme Kk Bearing part sealing device for rotary shaft

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