JP2009287601A - Clutch release bearing - Google Patents

Clutch release bearing Download PDF

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JP2009287601A
JP2009287601A JP2008137941A JP2008137941A JP2009287601A JP 2009287601 A JP2009287601 A JP 2009287601A JP 2008137941 A JP2008137941 A JP 2008137941A JP 2008137941 A JP2008137941 A JP 2008137941A JP 2009287601 A JP2009287601 A JP 2009287601A
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Japan
Prior art keywords
outer ring
bearing
clutch release
seal member
inner ring
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JP2008137941A
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Japanese (ja)
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Ikuo Ito
育夫 伊藤
Hajime Tazumi
一 田積
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JTEKT Corp
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JTEKT Corp
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Priority to JP2008137941A priority Critical patent/JP2009287601A/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
    • 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
    • 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
    • F16C33/7889—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to an inner race and extending toward the outer 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
    • 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
    • F16C33/7893—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a cage or integral therewith
    • 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
    • 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
    • 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
    • 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
    • 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)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a clutch release bearing having reduced torque loss while effectively suppressing the entry of foreign matters including mud water and the leakage of lubricating oil without increasing the number of components. <P>SOLUTION: At the one side end of an outer ring 20 of the clutch release bearing 10, an outer ring collar portion 22 is formed extending to the radial inward side. A one side end 38 of an inner ring 30 is formed on the bearing inward side of the outer ring collar portion 22 on the same side as one side where the outer ring collar portion 22 is formed. Between the outer ring collar portion 22 and the one side end 38 of the inner ring 30, a first seal member 50 is arranged which is fixed to the inner ring 30 while being located adjacent to the outer ring collar portion 22 in no contact therewith. On the radial outward side of the first seal member 50, an end 44 of a cage 40 at the side of the outer ring collar portion 22 is extended toward the outer ring collar portion 22 in the axial direction. An extending end face 46 of the cage 40 is being located adjacent to the side face on the bearing inward side of the outer ring collar portion 22 in no contact therewith to perform a sealing function. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明はクラッチレリーズ軸受に関する。具体的には、クラッチ機構の回転部材と接触して外輪が回転するタイプのクラッチレリーズ軸受の密封構造に関する。   The present invention relates to a clutch release bearing. Specifically, the present invention relates to a sealing structure for a clutch release bearing of the type in which an outer ring rotates in contact with a rotating member of a clutch mechanism.

自動車のマニュアルトランスミッションにはクラッチレリーズ軸受が使用されている。そして、このクラッチレリーズ軸受の内部に泥水等の異物が入ってしまうと、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、従来のクラッチレリーズ軸受には、軸受外部から軸受内部への泥水等の異物の侵入を防ぎ、軸受内部に封入されているグリース等の潤滑油の軸受外部への流出を防ぐために、内輪又は外輪のいずれか一方に固定され他方に摺接する接触タイプのシールを内輪と外輪の間に配置した構成の密封構造を採用しているものがある。 Clutch release bearings are used in the manual transmission of automobiles. If foreign matter such as muddy water enters the inside of the clutch release bearing, the lubricating oil such as grease enclosed in the bearing deteriorates, rust is generated inside the bearing, and the life of the bearing is reduced.
Therefore, in the conventional clutch release bearing, in order to prevent foreign matter such as muddy water from entering the bearing from the outside of the bearing and to prevent the lubricating oil such as grease enclosed inside the bearing from flowing out of the bearing, Some have adopted a sealing structure in which a contact type seal fixed to one of the outer rings and in sliding contact with the other is disposed between the inner ring and the outer ring.

先行技術文献として、特開２００１−３１１４３７号公報（特許文献１）には、外輪回転タイプのクラッチレリーズ軸受について、内輪に固定されたシール部材が外輪に摺接する構成の密封構造が記載されている。また、特開２００６−９８２６号公報（特許文献２）には、外輪回転タイプのクラッチレリーズ軸受について、外輪に固定されたシール部材が内輪に摺接する構成の密封構造が記載されている。   As a prior art document, Japanese Patent Application Laid-Open No. 2001-311437 (Patent Document 1) describes a sealing structure in which a seal member fixed to an inner ring is in sliding contact with an outer ring of a clutch release bearing of an outer ring rotation type. . Japanese Patent Laying-Open No. 2006-9826 (Patent Document 2) describes a sealing structure in which a seal member fixed to an outer ring is in sliding contact with an inner ring of an outer ring rotation type clutch release bearing.

しかし、外輪と内輪の間に接触タイプのシール部材を配設すると、外輪と内輪が相対回転するときのシール部材の接触摩擦によりトルク損失が生じるという問題がある。   However, when a contact-type seal member is disposed between the outer ring and the inner ring, there is a problem that torque loss occurs due to contact friction of the seal member when the outer ring and the inner ring rotate relative to each other.

そこで、相対回転する外輪又は内輪に対してシール部材を非接触とした密封構造が提案されている。例えば、特開２００６−９８２７号公報（特許文献３）には、非接触タイプのシール部材を用いるクラッチレリーズ軸受が記載されている。   Therefore, a sealing structure has been proposed in which the seal member is not in contact with the outer ring or the inner ring that rotates relative to each other. For example, JP 2006-9827 A (Patent Document 3) describes a clutch release bearing that uses a non-contact type seal member.

図２に、特許文献３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。図２に示すように、クラッチレリーズ軸受１１０は、外輪１２０と内輪１３０の間に転動可能に配置された複数の玉１１４と、外輪１２０と内輪１３０の間で玉１１４を回動自在に保持する保持器１４０を備えている。そして、外輪１２０の一端部に径方向内方に延びる鍔部１２２が形成され、ダイヤフラムスプリング（図示せず）と外輪１２０の鍔部１２２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、保持器１４０の外輪１２０の鍔部１２２側の端部が、外輪１２０と内輪１３０の間隙に向かって延在され、外輪１２０と内輪１３０の間隙を非接触的にシールするシール部１４２が形成されている。そして、保持器１４０に形成されたシール部１４２により、外輪１２０と内輪１３０との間隙を小さくできるため、異物の侵入と潤滑油の漏れを効果的に抑制できるというものである。
特開２００１−３１１４３７号公報 特開２００６−９８２６号公報 特開２００６−９８２７号公報 FIG. 2 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 3. As shown in FIG. 2, the clutch release bearing 110 holds a plurality of balls 114 rotatably arranged between the outer ring 120 and the inner ring 130 and rotatably holds the balls 114 between the outer ring 120 and the inner ring 130. A retainer 140 is provided. The outer ring 120 is a clutch release bearing of a type in which a flange 122 extending radially inward is formed at one end of the outer ring 120, and the outer ring 120 is rotated by contact between a diaphragm spring (not shown) and the flange 122 of the outer ring 120. . An end of the cage 140 on the flange 122 side of the outer ring 120 extends toward the gap between the outer ring 120 and the inner ring 130, and a seal portion 142 that seals the gap between the outer ring 120 and the inner ring 130 in a non-contact manner. Is formed. Since the gap between the outer ring 120 and the inner ring 130 can be reduced by the seal portion 142 formed on the cage 140, the intrusion of foreign matters and the leakage of lubricating oil can be effectively suppressed.
JP 2001-311437 A JP 2006-9826 A JP 2006-9827 A

しかしながら、クラッチレリーズ軸受１１０では、シール部１４２により外輪１２０と内輪１３０との間隙を小さくすることはできるが、軸受内部が軸受外部に対して直接開口している。そのため、泥水等の異物がシール部１４２と外輪１２０及び内輪１３０との間隙を通って軸受内部に侵入して、潤滑油の劣化及び軸受内部での錆発生の原因となると考えられる。また、潤滑油が、シール部１４２と外輪１２０及び内輪１３０との間隙を通って軸受外部に漏れ出すことも考えられる。
よって、クラッチレリーズ軸受１１０は、特許文献１、特許文献２に記載の技術に比べれば、専用のシール部材を省略して部品点数を減らした点およびシールを非接触としてトルク損失を低減した点に効果が認められるとしても、異物の侵入と潤滑油の漏れを効果的に抑止するという点に課題が残る。 However, in the clutch release bearing 110, the gap between the outer ring 120 and the inner ring 130 can be reduced by the seal portion 142, but the inside of the bearing is directly open to the outside of the bearing. Therefore, it is considered that foreign matters such as muddy water enter the bearing through the gap between the seal portion 142 and the outer ring 120 and the inner ring 130, causing deterioration of the lubricating oil and generation of rust inside the bearing. It is also conceivable that the lubricating oil leaks out of the bearing through the gap between the seal portion 142 and the outer ring 120 and the inner ring 130.
Therefore, the clutch release bearing 110 is different from the techniques described in Patent Document 1 and Patent Document 2 in that the dedicated seal member is omitted and the number of parts is reduced and the torque loss is reduced by making the seal non-contact. Even if the effect is recognized, a problem remains in that the intrusion of foreign matters and the leakage of lubricating oil are effectively suppressed.

そこで、本発明が解決しようとする課題は、トルク損失を低減させ、また部品点数を増加させることなく、泥水等の異物侵入と潤滑油の漏れを効果的に抑止できるクラッチレリーズ軸受を提供することにある。   Therefore, the problem to be solved by the present invention is to provide a clutch release bearing capable of effectively suppressing foreign matter intrusion such as muddy water and leakage of lubricating oil without reducing torque loss and increasing the number of parts. It is in.

上記課題を解決するため、本発明にかかるクラッチレリーズ軸受は次の手段をとる。
まず、本発明の第１の発明は、外輪と、内輪と、外輪と内輪の間に転動可能に配置された複数の転動体と、転動体を回動自在に保持する保持器を備え、
前記外輪の一側端部には径方向内方に延びる外輪鍔部が形成されると共に、該外輪鍔部の軸受外部の側面はクラッチ機構の回転部材が接触する接触面とされ、該外輪鍔部が形成された一側と同じ側に該外輪鍔部から軸受内方に所定の間隔をおいて前記内輪の一側端部が形成された、クラッチレリーズ軸受であって、
前記外輪鍔部と前記内輪の一側端部の間には、該内輪の一側端部に固定され、該外輪鍔部とは非接触の近接状態とされたシール部材が配設されており、
前記シール部材の径方向外方において、前記保持器の外輪鍔部側の端部は外輪鍔部へ向けて軸線方向に延設され、該保持器の延設端面が、外輪鍔部の軸受内方の側面と非接触のシール機能を果たすことのできる近接状態として配設されていることを特徴とする。 In order to solve the above problems, the clutch release bearing according to the present invention takes the following means.
First, the first invention of the present invention comprises an outer ring, an inner ring, a plurality of rolling elements arranged so as to be able to roll between the outer ring and the inner ring, and a cage for rotatably holding the rolling element,
An outer ring flange portion extending radially inward is formed at one end of the outer ring, and a side surface outside the bearing of the outer ring flange portion is a contact surface with which a rotating member of the clutch mechanism comes into contact. A clutch release bearing in which one end of the inner ring is formed at a predetermined interval from the outer ring flange to the inside of the bearing on the same side as the one side on which the part is formed,
Between the outer ring collar part and one side end part of the inner ring, a seal member fixed to the one side end part of the inner ring and in a non-contact proximity state with the outer ring collar part is disposed. ,
On the outer side in the radial direction of the seal member, the end of the cage on the outer ring flange side is extended in the axial direction toward the outer ring flange, and the extended end surface of the cage is in the bearing of the outer ring flange. It is characterized by being arranged in a close proximity state that can perform a non-contact sealing function with the other side surface.

この第１の発明によれば、内輪に固定されたシール部材は外輪鍔部と非接触とされているため、接触タイプに比べてトルク損失が低減する。なお、保持器の端部は外輪鍔部と非接触とされているため、保持器の形状変更によるトルク損失は考慮しなくてよい。
そして、シール部材と外輪鍔部が非接触の近接状態とされラビリンスを形成するので、シール部材と外輪鍔部の隙間からの泥水等の異物の軸受内部への侵入が抑止される。
また、保持器の端部が外輪鍔部の軸受内方の側面と非接触の近接状態とされて、ラビリンスが形成されている。よって、シール部材と外輪鍔部の隙間から泥水等の異物が径方向外方の軸受内部へ侵入した場合でも、シール部材よりも径方向外方で保持器の端部と外輪鍔部で形成されるラビリンスにより、保持器の端部から軸受内方への異物の侵入が抑止される。そして、シール部材と保持器の端部により軸受内部の潤滑油が封入される部位が軸受外部から遮蔽されるため、潤滑油の漏れを抑止できる。
そして、ラビリンスの形成には、外輪鍔部とシール部材と保持器のみが関係しており、新たな部品は使用しないので部品点数は増加せず、組付け工数の増加も伴わない。
よって、トルク損失を低減させ、また部品点数を増加させることなく、泥水等の異物侵入と潤滑油の漏れを効果的に抑止できるクラッチレリーズ軸受を提供できる。 According to the first invention, since the seal member fixed to the inner ring is not in contact with the outer ring collar part, torque loss is reduced as compared with the contact type. Since the end of the cage is not in contact with the outer ring collar, torque loss due to the shape change of the cage need not be taken into consideration.
And since a sealing member and an outer ring collar part are made into a non-contact proximity state and a labyrinth is formed, the penetration | invasion to the inside of a bearing of foreign materials, such as muddy water, from the clearance gap between a sealing member and an outer ring collar part is suppressed.
The labyrinth is formed by bringing the end portion of the cage into a non-contact proximity state with the inner surface of the bearing of the outer ring collar portion. Therefore, even when a foreign matter such as muddy water enters the inside of the bearing radially outward from the gap between the seal member and the outer ring collar part, it is formed at the end of the cage and the outer ring collar part radially outside the seal member. The labyrinth prevents foreign matter from entering the bearing from the end of the cage. And since the site | part by which the lubricating oil inside a bearing is enclosed with the sealing member and the edge part of a holder | retainer is shielded from the bearing exterior, the leakage of lubricating oil can be suppressed.
The formation of the labyrinth involves only the outer ring collar part, the seal member, and the cage, and since no new parts are used, the number of parts does not increase and the number of assembling steps does not increase.
Therefore, it is possible to provide a clutch release bearing that can effectively suppress entry of foreign matter such as muddy water and leakage of lubricating oil without reducing torque loss and increasing the number of parts.

次に、本発明の第２の発明は、上記第１の発明に係るクラッチレリーズ軸受であって、前記シール部材には外輪鍔部の軸受内方の側面と非接触の近接状態として配設されるシールリップが形成されており、該シールリップの軸受内方の側面は前記保持器の延設端面と非接触の近接状態とされていることを特徴とする。
この第２の発明によれば、シール部材のシールリップが外輪鍔部に非接触の近接状態とされラビリンスが形成されるので、外輪鍔部とシール部材の隙間から泥水等の異物が外輪鍔部の軸受内側に入り込んだ場合でも、外輪鍔部とシールリップによるラビリンスにより軸受内部への異物の侵入が抑止される。そして、泥水等の異物が外輪鍔部とシールリップの間を越えてシールリップの外径側まで達したとしても、径方向外方では外輪鍔部と保持器の延設端面で形成されるラビリンスにより泥水等の異物の保持器の延設端面から軸受内方への侵入が抑止され、径方向内方ではシールリップと保持器の延設端面で形成されるラビリンスにより泥水等の異物の保持器の延設端面から軸受内方への侵入が抑止される。
そして、上述したラビリンスは、軸受内部の潤滑油が封入される部位を軸受外部から遮蔽する効果を有するため、潤滑油の漏れを抑止できる。 Next, a second invention of the present invention is the clutch release bearing according to the first invention, wherein the seal member is disposed in a non-contact proximity state with the inner side surface of the outer ring collar portion. A seal lip is formed, and a side surface of the seal lip on the inner side of the bearing is in a non-contact proximity state with the extended end surface of the cage.
According to the second aspect of the present invention, the seal lip of the seal member is brought into a non-contact proximity state with the outer ring flange portion so that a labyrinth is formed, so that foreign matter such as muddy water is removed from the gap between the outer ring flange portion and the seal member. Even when entering the inside of the bearing, the intrusion of foreign matter into the bearing is suppressed by the labyrinth by the outer ring collar portion and the seal lip. Even if foreign matter such as muddy water passes between the outer ring flange and the seal lip and reaches the outer diameter side of the seal lip, the labyrinth formed by the outer ring flange and the extended end surface of the cage is radially outward. This prevents foreign matter such as muddy water from entering the inside of the bearing from the extended end face of the cage, and retains foreign matter such as muddy water by a labyrinth formed by the seal lip and the extended end face of the cage in the radial direction. Intrusion into the bearing inward from the extended end face is suppressed.
And since the labyrinth mentioned above has the effect which shields the site | part with which the lubricating oil inside a bearing is enclosed from the bearing exterior, it can suppress the leakage of lubricating oil.

上術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、内輪に固定されたシール部材は外輪鍔部と非接触とされているため、接触タイプに比べてトルク損失が低減する。そして、シール部材と外輪鍔部が非接触の近接状態とされラビリンスを形成するので、シール部材と外輪鍔部の隙間からの泥水等の異物の軸受内部への侵入が抑止される。
また、シール部材と外輪鍔部の隙間からの泥水等の異物が径方向外方の軸受内部へ侵入した場合でも、シール部材よりも径方向外方で保持器の延設端面と外輪鍔部で形成されるラビリンスにより、保持器の延設端面から軸受内方への異物の侵入が抑止される。そして、シール部材と保持器の延設端面により軸受内部の潤滑油が封入される部位が軸受外部から遮蔽され、潤滑油の漏れを抑止できる。そして、外輪鍔部とシール部材及び保持器の他に、新たな部品は使用しないので部品点数は増加せず、組付け工数の増加も伴わない。
よって、トルク損失を低減させ、また部品点数を増加させることなく、泥水等の異物侵入と潤滑油の漏れを効果的に抑止できるクラッチレリーズ軸受を提供できる。
次に上述の第２の発明によれば、外輪鍔部とシール部材の隙間から泥水等の異物が外輪鍔部の軸受内側に入り込んだ場合でも、シールリップと外輪鍔部で形成されるラビリンスにより、軸受内部への異物の侵入が抑止される。そして、泥水等の異物が外輪鍔部とシールリップの間を越えてシールリップの外径側まで達したとしても、外輪鍔部と保持器の延設端面で形成されるラビリンスおよびシールリップと保持器の延設端面で形成されるラビリンスにより、泥水等の異物の保持器の延設端面から軸受内方への侵入が抑止される。
そして、上述したラビリンスは、軸受内部の潤滑油が封入される部位を軸受外部から遮蔽する効果を有するため、潤滑油の漏れを抑止できる。 According to each invention of the present invention, the following effects can be obtained.
First, according to the first invention described above, since the seal member fixed to the inner ring is not in contact with the outer ring collar part, torque loss is reduced as compared with the contact type. And since a sealing member and an outer ring collar part are made into a non-contact proximity state and a labyrinth is formed, the penetration | invasion to the inside of a bearing of foreign materials, such as muddy water, from the clearance gap between a sealing member and an outer ring collar part is suppressed.
Even when foreign matter such as muddy water from the gap between the seal member and the outer ring flange enters the inside of the radially outer bearing, the extended end surface of the cage and the outer ring flange are more radially outward than the seal member. The formed labyrinth prevents foreign matter from entering the bearing from the extended end face of the cage. And the site | part by which the lubricating oil inside a bearing is enclosed with the extended end surface of a sealing member and a holder is shielded from the bearing exterior, and the leakage of lubricating oil can be suppressed. In addition to the outer ring flange portion, the seal member, and the cage, no new parts are used, so the number of parts does not increase and the number of assembly steps does not increase.
Therefore, it is possible to provide a clutch release bearing that can effectively suppress entry of foreign matter such as muddy water and leakage of lubricating oil without reducing torque loss and increasing the number of parts.
Next, according to the second invention described above, even when foreign matter such as muddy water enters the inside of the bearing of the outer ring collar from the gap between the outer ring collar and the seal member, the labyrinth formed by the seal lip and the outer ring collar Intrusion of foreign matter into the bearing is suppressed. Even if foreign matter such as muddy water passes between the outer ring flange and the seal lip and reaches the outer diameter side of the seal lip, the labyrinth and the seal lip formed by the extended end surface of the outer ring flange and the cage are retained. The labyrinth formed by the extended end surface of the cage prevents entry of foreign matter such as muddy water from the extended end surface of the cage into the inside of the bearing.
And since the labyrinth mentioned above has the effect which shields the site | part with which the lubricating oil inside a bearing is enclosed from the bearing exterior, it can suppress the leakage of lubricating oil.

以下、本発明を実施するための最良の形態について実施例にしたがって説明する。   Hereinafter, the best mode for carrying out the present invention will be described according to examples.

図１に本発明の実施例１におけるクラッチレリーズ軸受１０の部分断面図を示す。クラッチレリーズ軸受１０は外輪２０と、内輪３０と、外輪２０と内輪３０の間に転動可能に配置された複数の玉（転動体）１４と、外輪２０と内輪３０の間で玉（転動体）１４を回動自在に収容するポケット４２が設けられた保持器４０とを備えた外輪回転タイプのクラッチレリーズ軸受である。   FIG. 1 shows a partial cross-sectional view of a clutch release bearing 10 in Embodiment 1 of the present invention. The clutch release bearing 10 includes an outer ring 20, an inner ring 30, a plurality of balls (rolling elements) 14 that are arranged to roll between the outer ring 20 and the inner ring 30, and balls (rolling elements) between the outer ring 20 and the inner ring 30. And an outer ring rotating type clutch release bearing provided with a retainer 40 provided with a pocket 42 for rotatably accommodating 14.

そして、外輪２０の一端部には径方向内方に延びる外輪鍔部２２が形成されると共に、外輪鍔部２２の軸受外方の側面はダイヤフラムスプリング１２が接触する接触面２４とされている。このダイヤフラムスプリング１２が本発明のクラッチ機構の回転部材に相当する。そして、外輪鍔部２２が形成された一側と同じ側の内輪３０の端部には、径方向内方に延びる内輪鍔部３４が外輪鍔部２２と所定の間隔をおいて形成されている。この内輪鍔部３４の軸受外方の側面が内輪３０の一側端部３８に相当する。そして、内輪３０には、内輪鍔部３４から軸受内方に、外径面が軸線方向に平行な円筒形の筒状部３２が形成されている。なお、外輪２０および内輪３０はプレス加工により形成される。   An outer ring flange 22 extending radially inward is formed at one end of the outer ring 20, and a side surface outside the bearing of the outer ring flange 22 is a contact surface 24 with which the diaphragm spring 12 contacts. This diaphragm spring 12 corresponds to the rotating member of the clutch mechanism of the present invention. Further, an inner ring flange portion 34 extending radially inward is formed at a predetermined distance from an end portion of the inner ring 30 on the same side as the one side on which the outer ring flange portion 22 is formed. . The side surface of the inner ring flange 34 on the outer side of the bearing corresponds to one end 38 of the inner ring 30. The inner ring 30 is formed with a cylindrical tubular portion 32 having an outer diameter surface parallel to the axial direction from the inner ring flange 34 to the inside of the bearing. The outer ring 20 and the inner ring 30 are formed by pressing.

そして、内輪３０の筒状部３２から内輪鍔部３４に跨って、第１シール部材５０が配設されている。この第１シール部材５０が本発明のシール部材に相当する。この第１シール部材５０は、金属製の芯金５２にゴム製の被覆部５４を装着した円環状の部材であって、内輪３０に対して内輪鍔部３４が形成された側から圧入され、内輪３０の筒状部３２に形成された係合溝３６に係合して内輪３０に固定されている。そして、第１シール部材５０は、被覆部５４と一体で形成されたゴム製のアキシアルリップ５６と、被覆部５４と一体で形成されたゴム製のシールリップ５８を備えている。
そして、アキシアルリップ５６は、外輪鍔部２２の先端２６と狭小な間隔で近接し外輪２０と非接触とされている。また、シールリップ５８は、外輪鍔部２２の軸受内方の側面と狭小な間隔で近接し外輪鍔部２２と非接触とされており、シールリップ５８の軸受内方の側面は、次に説明する保持器４０の延設端面４６と非接触の近接状態とされている。
なお、実施例１では被覆部５４、アキシアルリップ５６及びシールリップ５８をゴム製としているが、これらは、軟質樹脂製としても良い。 A first seal member 50 is disposed from the tubular portion 32 of the inner ring 30 to the inner ring collar portion 34. The first seal member 50 corresponds to the seal member of the present invention. The first seal member 50 is an annular member having a metal cored bar 52 and a rubber covering portion 54 attached thereto. The first seal member 50 is press-fitted into the inner ring 30 from the side where the inner ring collar portion 34 is formed, The inner ring 30 is fixed to the inner ring 30 by engaging with an engaging groove 36 formed in the cylindrical portion 32 of the inner ring 30. The first seal member 50 includes a rubber axial lip 56 formed integrally with the covering portion 54, and a rubber seal lip 58 formed integrally with the covering portion 54.
The axial lip 56 is close to the front end 26 of the outer ring collar portion 22 at a narrow interval and is not in contact with the outer ring 20. Further, the seal lip 58 is close to the bearing inner side surface of the outer ring flange portion 22 at a narrow interval and is not in contact with the outer ring flange portion 22. The side surface of the seal lip 58 on the inner side of the bearing will be described next. The extended end surface 46 of the retainer 40 is in a non-contact proximity state.
In the first embodiment, the covering portion 54, the axial lip 56, and the seal lip 58 are made of rubber, but these may be made of a soft resin.

そして、第１シール部材５０の径方向外方において、保持器４０の外輪鍔部２２の側の端部４４が外輪鍔部２２へ向けて軸線方向に延設されている。そして、延設された保持器４０の端部４４には、径方向内方および径方向外方に張り出した延設端面鍔部４８が形成されており、保持器４０の外輪鍔部２２に対向する面は、断面がＴ字型となる延設端面４６とされている。そして、保持器４０の延設端面４６は外輪鍔部２２の軸受内方の側面と非接触とされ、保持器４０の延設端面４６の径方向外方で外輪鍔部２２と非接触のシール機能を果たすことのできる近接状態とされている。なお、実施例１では保持器４０は樹脂製としているが、保持器４０は樹脂製には限定されない。   Then, on the outer side in the radial direction of the first seal member 50, an end 44 on the outer ring flange part 22 side of the cage 40 extends in the axial direction toward the outer ring flange part 22. An extended end face flange 48 projecting radially inward and radially outward is formed at the end 44 of the extended retainer 40, and faces the outer ring flange 22 of the retainer 40. The surface to be formed is an extended end surface 46 having a T-shaped cross section. The extended end face 46 of the retainer 40 is not in contact with the inner side surface of the bearing of the outer ring flange part 22, and the outer ring flange part 22 is not contacted with the outer end of the extended end face 46 in the radial direction. Proximity that can fulfill the function. In the first embodiment, the cage 40 is made of resin, but the cage 40 is not limited to resin.

そして、クラッチレリーズ軸受１０の他端部には、外輪２０に外嵌めされた第２シール部材６０が装着されており、第２シール部材６０の先端に形成されたシールリップ６２が内輪３０の外周面に摺接する構成とされている。そして、第２シール部材６０の軸受外方には、内輪３０に内嵌めされたスリンガ６４が、第２シール部材６０に近接して配設されている。   A second seal member 60 fitted on the outer ring 20 is attached to the other end of the clutch release bearing 10, and a seal lip 62 formed at the tip of the second seal member 60 is an outer periphery of the inner ring 30. It is set as the structure which slidably contacts a surface. A slinger 64 fitted in the inner ring 30 is disposed in the vicinity of the second seal member 60 outside the bearing of the second seal member 60.

この実施例１によれば、内輪３０に固定された第１シール部材５０は外輪鍔部２２と非接触とされているため、接触タイプに比べてトルク損失が低減する。なお、保持器４０の延設端面４６は外輪鍔部２２と非接触とされているため、保持器４０の形状変更によるトルク損失は考慮しなくてよい。そして、第１シール部材５０と外輪鍔部２２が非接触の近接状態とされラビリンスを形成するので、第１シール部材５０と外輪鍔部２２の隙間からの泥水等の異物の軸受内部への侵入が抑止される。
また、保持器４０の延設端面４６が外輪鍔部２２の軸受内方の側面と非接触の近接状態とされて、ラビリンスが形成されている。よって、第１シール部材５０と外輪鍔部２２の隙間から泥水等の異物が軸受内部へ侵入した場合でも、第１シール部材５０よりも径方向外方で保持器４０の延設端面４６と外輪鍔部２２で形成されるラビリンスにより、保持器４０の延設端面４６から軸受内方への異物の侵入が抑止される。そして、第１シール部材５０と保持器４０の延設端面４６により軸受内部の潤滑油が封入される部位が軸受外部から遮蔽されるため、潤滑油の漏れを抑止できる。そして、ラビリンスの形成には、外輪鍔部２２と第１シール部材５０と保持器４０の他に、新たな部品は使用していないので部品点数は増加しておらず、組み付け工数の増加も伴っていない。
よって、トルク損失を低減させ、また部品点数を増加させることなく、泥水等の異物侵入と潤滑油の漏れを効果的に抑止できるクラッチレリーズ軸受を提供することができる。 According to the first embodiment, since the first seal member 50 fixed to the inner ring 30 is not in contact with the outer ring collar portion 22, torque loss is reduced as compared with the contact type. In addition, since the extended end surface 46 of the retainer 40 is not in contact with the outer ring flange portion 22, it is not necessary to consider the torque loss due to the shape change of the retainer 40. And since the 1st seal member 50 and the outer ring collar part 22 will be in a non-contact proximity state and form a labyrinth, intrusion of foreign matters such as muddy water from the gap between the first seal member 50 and the outer ring collar part 22 into the bearing Is suppressed.
Moreover, the extended end surface 46 of the retainer 40 is brought into a non-contact proximity state with the inner side surface of the bearing of the outer ring flange portion 22 to form a labyrinth. Therefore, even when foreign matter such as muddy water enters the inside of the bearing from the gap between the first seal member 50 and the outer ring flange portion 22, the extended end surface 46 and the outer ring of the retainer 40 are radially outward from the first seal member 50. The labyrinth formed by the flange portion 22 prevents foreign matter from entering the bearing inward from the extended end surface 46 of the cage 40. And since the site | part by which the lubricating oil inside a bearing is enclosed by the extended end surface 46 of the 1st seal member 50 and the holder | retainer 40 is shielded from the bearing exterior, the leakage of lubricating oil can be suppressed. In addition to the outer ring flange portion 22, the first seal member 50, and the retainer 40, the labyrinth is not formed with new parts, so the number of parts is not increased and the number of assembling steps is increased. Not.
Therefore, it is possible to provide a clutch release bearing that can effectively suppress entry of foreign matter such as muddy water and leakage of lubricating oil without reducing torque loss and increasing the number of parts.

また、第１シール部材５０のシールリップ５８が外輪鍔部２２と非接触の近接状態でラビリンスを形成するので、外輪鍔部２２と第１シール部材５０の隙間から泥水等の異物が外輪鍔部２２の軸受内側に入り込んだ場合でも、外輪鍔部２２とシールリップ５８によるラビリンスにより軸受内部への異物の侵入が抑止される。
そして、泥水等の異物が外輪鍔部２２とシールリップ５８の間を越えてシールリップ５８の外径側の端まで達したとしても、径方向外方では外輪鍔部２２と保持器４０の延設端面４６で形成されるラビリンスにより泥水等の異物の保持器４０の延設端面４６から軸受内方への侵入が抑止され、径方向内方ではシールリップ５８と保持器４０の延設端面４６で形成されるラビリンスにより泥水等の異物の保持器４０の延設端面４６から軸受内方への侵入が抑止される。
そして、上述したラビリンスは、軸受内部の潤滑油が封入される部位を軸受外部から遮蔽する効果を有するため、潤滑油の漏れを抑止することができる。 Further, since the seal lip 58 of the first seal member 50 forms a labyrinth in the non-contact proximity state with the outer ring flange portion 22, foreign matters such as muddy water from the gap between the outer ring flange portion 22 and the first seal member 50. Even when entering the inside of the bearing 22, entry of foreign matter into the bearing is suppressed by the labyrinth by the outer ring flange portion 22 and the seal lip 58.
Even if foreign matter such as muddy water passes between the outer ring flange portion 22 and the seal lip 58 and reaches the outer diameter end of the seal lip 58, the outer ring flange portion 22 and the retainer 40 extend radially outward. The labyrinth formed by the installation end surface 46 prevents entry of foreign matter such as muddy water from the extension end surface 46 of the cage 40 into the bearing inward, and the seal lip 58 and the extension end surface 46 of the cage 40 radially inward. By the labyrinth formed by the above, entry of foreign matter such as muddy water from the extended end face 46 of the cage 40 into the bearing inward is suppressed.
And since the labyrinth mentioned above has an effect which shields the site | part with which the lubricating oil inside a bearing is enclosed from the bearing exterior, it can suppress the leakage of lubricating oil.

なお、本発明は、上記実施例に限られるものではなく、例えば、第１シール部材５０のアキシアルリップ５６を省略した構成とすることができる。また、内輪３０が内輪鍔部３４を有さない構成とすることもできる。その他、本発明に係るクラッチレリーズ軸受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 addition, this invention is not restricted to the said Example, For example, it can be set as the structure which abbreviate | omitted the axial lip 56 of the 1st seal member 50. FIG. Further, the inner ring 30 may be configured not to have the inner ring collar portion 34. In addition, the clutch release bearing according to the present invention can be implemented in various forms within the scope of the idea of the invention.

実施例１における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 in Example 1. 従来技術による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 by a prior art.

符号の説明Explanation of symbols

１０ クラッチレリーズ軸受
１２ ダイヤフラムスプリング
１４ 玉（転動体）
２０ 外輪
２２ 外輪鍔部
２４ 接触面
２６ 先端
３０ 内輪
３２ 筒状部
３４ 内輪鍔部
３６ 係合溝
３８ 一側端部
４０ 保持器
４２ ポケット
４４ 端部
４６ 延設端面
４８ 延設端面鍔部
５０ 第１シール部材
５２ 芯金
５４ 被覆部
５６ アキシアルリップ
５８ シールリップ
６０ 第２シール部材
６２ シールリップ
６４ スリンガ
10 Clutch release bearing 12 Diaphragm spring 14 Ball (rolling element)
20 outer ring 22 outer ring flange 24 contact surface 26 tip 30 inner ring 32 cylindrical portion 34 inner ring flange 36 engaging groove 38 one end 40 retainer 42 pocket 44 end 46 extended end surface 48 extended end surface flange 50 first 1 seal member 52 cored bar 54 covering portion 56 axial lip 58 seal lip 60 second seal member 62 seal lip 64 slinger

Claims (2)

外輪と、内輪と、外輪と内輪の間に転動可能に配置された複数の転動体と、転動体を回動自在に保持する保持器を備え、
前記外輪の一側端部には径方向内方に延びる外輪鍔部が形成されると共に、該外輪鍔部の軸受外部の側面はクラッチ機構の回転部材が接触する接触面とされ、該外輪鍔部が形成された一側と同じ側に該外輪鍔部から軸受内方に所定の間隔をおいて前記内輪の一側端部が形成された、クラッチレリーズ軸受であって、
前記外輪鍔部と前記内輪の一側端部の間には、該内輪の一側端部に固定され、該外輪鍔部とは非接触の近接状態とされたシール部材が配設されており、
前記シール部材の径方向外方において、前記保持器の外輪鍔部側の端部は外輪鍔部へ向けて軸線方向に延設され、該保持器の延設端面が、外輪鍔部の軸受内方の側面と非接触のシール機能を果たすことのできる近接状態として配設されていることを特徴とするクラッチレリーズ軸受。 An outer ring, an inner ring, a plurality of rolling elements arranged to roll between the outer ring and the inner ring, and a retainer that rotatably holds the rolling element,
An outer ring flange portion extending radially inward is formed at one end of the outer ring, and a side surface outside the bearing of the outer ring flange portion is a contact surface with which a rotating member of the clutch mechanism comes into contact. A clutch release bearing in which one end of the inner ring is formed at a predetermined interval from the outer ring flange to the inside of the bearing on the same side as the one side on which the part is formed,
Between the outer ring collar part and one side end part of the inner ring, a seal member fixed to the one side end part of the inner ring and in a non-contact proximity state with the outer ring collar part is disposed. ,
On the outer side in the radial direction of the seal member, the end of the cage on the outer ring flange side is extended in the axial direction toward the outer ring flange, and the extended end surface of the cage is in the bearing of the outer ring flange. A clutch release bearing, wherein the clutch release bearing is arranged in a close proximity state capable of performing a non-contact sealing function with the other side surface. 請求項１に記載のクラッチレリーズ軸受であって、
前記シール部材には外輪鍔部の軸受内方の側面と非接触の近接状態として配設されるシールリップが形成されており、該シールリップの軸受内方の側面は前記保持器の延設端面と非接触の近接状態とされていることを特徴とするクラッチレリーズ軸受。
The clutch release bearing according to claim 1,
The seal member is formed with a seal lip disposed in a non-contact proximity state with the inner side surface of the bearing of the outer ring flange portion, and the inner side surface of the seal lip on the bearing is an extended end surface of the cage A clutch release bearing characterized by being in a non-contact proximity state.
JP2008137941A 2008-05-27 2008-05-27 Clutch release bearing Pending JP2009287601A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112032191A (en) * 2020-08-26 2020-12-04 人本股份有限公司 Thrust angular contact ball bearing for steering gear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112032191A (en) * 2020-08-26 2020-12-04 人本股份有限公司 Thrust angular contact ball bearing for steering gear

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