JP2007192356A - Sealing device for rolling bearing - Google Patents

Sealing device for rolling bearing Download PDF

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Publication number
JP2007192356A
JP2007192356A JP2006012538A JP2006012538A JP2007192356A JP 2007192356 A JP2007192356 A JP 2007192356A JP 2006012538 A JP2006012538 A JP 2006012538A JP 2006012538 A JP2006012538 A JP 2006012538A JP 2007192356 A JP2007192356 A JP 2007192356A
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Prior art keywords
seal body
sealing device
rolling bearing
surface portion
annular seal
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JP2006012538A
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Japanese (ja)
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Yukihiro Akaha
幸広 赤羽
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NSK Ltd
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NSK Ltd
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Priority to JP2006012538A priority Critical patent/JP2007192356A/en
Publication of JP2007192356A publication Critical patent/JP2007192356A/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
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7853—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with one or more sealing lips to contact the inner 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
    • 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
    • F16C19/18—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 two or more rows of balls
    • F16C19/181—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 two or more rows of balls with angular contact
    • F16C19/183—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 two or more rows of balls with angular contact with two rows at opposite angles
    • F16C19/184—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 two or more rows of balls with angular contact with two rows at opposite angles in O-arrangement

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)
  • Sealing Of Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealing device for a rolling bearing capable of preventing liquid sticking to an annular seal body from infiltrating inside the bearing. <P>SOLUTION: A plurality of dams 15 changing a flow of the liquid sticking to an outside surface part 12a of the annular seal body 12 in the direction except for the circumferential direction of the annular seal body 12, are radially arranged in the outside surface part 12a of the annular seal body 12. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、たとえばオルタネータ、エアコン用コンプレッサなどの自動車用補機あるいは補機駆動用プーリなどに軸受として用いられる転がり軸受の内部を密封する転がり軸受用密封装置に関する。   The present invention relates to a rolling bearing sealing device that seals the inside of a rolling bearing used as a bearing in, for example, an automotive auxiliary machine such as an alternator and an air conditioner compressor or an auxiliary machine driving pulley.

オルタネータ、エアコン用コンプレッサなどの自動車用補機あるいは補機駆動用プーリは自動車のエンジンルーム内に収容されており、これらの補機やプーリに泥水が直接的あるいは間接的に付着し、補機用軸受やプーリ用軸受として用いられる転がり軸受の内部に泥水中の泥や砂が異物として浸入すると、転がり軸受の内部に封入されたグリースの潤滑機能が低下し、転がり軸受の寿命低下などを引き起こす原因となる。また、プーリやベルトに泥水が付着するとベルトスリップによる摩耗や過熱を引き起こす原因となり、さらに自動車用補機としての電磁クラッチに泥水が付着するとクラッチのスリップなどが懸念される。そこで、従来では、図１４に示すように、転がり軸受２０の軸方向両端部に密封装置１０を装着し、この密封装置１０により転がり軸受２０の内部を密封して異物の浸入やグリースの漏洩などを防止するようにしている。   Automotive auxiliary equipment such as alternators and compressors for air conditioners, or pulleys for driving auxiliary equipment are housed in the engine room of automobiles, and muddy water adheres to these auxiliary equipment and pulleys directly or indirectly, and is used for auxiliary equipment. If mud or sand in the muddy water enters the inside of a rolling bearing used as a bearing or pulley bearing as a foreign object, the lubrication function of the grease enclosed in the rolling bearing will be reduced, leading to a reduction in the life of the rolling bearing. It becomes. Further, if muddy water adheres to the pulley or belt, it causes wear and overheating due to belt slip, and if muddy water adheres to an electromagnetic clutch as an auxiliary machine for automobiles, there is a concern about slipping of the clutch. Therefore, conventionally, as shown in FIG. 14, the sealing device 10 is attached to both ends of the rolling bearing 20 in the axial direction, and the inside of the rolling bearing 20 is sealed by the sealing device 10 so that foreign matter enters and grease leaks. Try to prevent.

転がり軸受に用いられる従来の密封装置の一例を図１５に示す。同図に示される密封装置１０は芯金と称される円環状の金属板１１を有しており、この金属板１１の片側表面部（図中左側表面部）には、ゴムなどの軟質材からなる環状シール体１２が固着されている。
環状シール体１２はその外側周縁部または内側周縁部（この場合は外側周縁部）に固定部１３を有しており、転がり軸受の回転側軌道輪には、上記固定部１３と嵌合する密封装置取付溝（図示せず）が形成されている。また、環状シール体１２は主リップ１４ａと外側リップ１４ｂとからなるシールリップ部１４を前記した固定部１３と反対側の周縁部（この場合は内側周縁部）に有しており、図１４に示す転がり軸受２０の回転側軌道輪２１と固定側軌道輪２２との間の空隙部は、シールリップ部１４の主リップ１４ａと外側リップ１４ｂが固定側軌道輪２２に接触または固定側軌道輪２２との間にラビリンスシールを形成することによって密封されるようになっている。 An example of a conventional sealing device used for a rolling bearing is shown in FIG. A sealing device 10 shown in the figure has an annular metal plate 11 called a cored bar, and a soft material such as rubber is provided on one surface portion (left surface portion in the figure) of the metal plate 11. An annular seal body 12 is fixed.
The annular seal body 12 has a fixed portion 13 at the outer peripheral edge portion or the inner peripheral edge portion (in this case, the outer peripheral edge portion). A device mounting groove (not shown) is formed. Further, the annular seal body 12 has a seal lip portion 14 composed of a main lip 14a and an outer lip 14b at the peripheral edge portion (in this case, the inner peripheral edge portion) opposite to the fixed portion 13, as shown in FIG. The gap between the rotation-side bearing ring 21 and the stationary-side bearing ring 22 of the rolling bearing 20 shown in FIG. A labyrinth seal is formed between them.

このような転がり軸受用密封装置では、転がり軸受の回転側軌道輪が回転している時に軸受側に跳ね返った水などの液体Ｗが環状シール体１２の外側表面部に付着すると、図１６に示すように、環状シール体１２に付着した液体Ｗが環状シール体１２の円周方向に清流の如く流動する。このため、環状シール体１２に付着する液体Ｗの量が多い場合には、外側リップ１４ｂと固定側軌道輪２２の近傍に液体Ｗが常に滞留した状態となるため、環状シール体１２に付着した液体Ｗが外側リップ１４ｂと固定側軌道輪２２との間から軸受内部に浸入するおそれがあった。   In such a rolling bearing sealing device, when the liquid W such as water bounced back to the bearing side adheres to the outer surface portion of the annular seal body 12 when the rotating bearing ring of the rolling bearing is rotating, it is shown in FIG. Thus, the liquid W adhering to the annular seal body 12 flows like a clear stream in the circumferential direction of the annular seal body 12. For this reason, when the amount of the liquid W adhering to the annular seal body 12 is large, the liquid W always stays in the vicinity of the outer lip 14b and the fixed-side raceway ring 22, and therefore adheres to the annular seal body 12. There is a risk that the liquid W may enter the bearing from between the outer lip 14 b and the stationary race ring 22.

なお、下記の特許文献１には、密封装置とは別に設けた回転リングに溝又は凸状部を設けて軸受内部に水などが浸入することを防止したものが開示されているが、この特許文献１に記載されたものは、密封装置とは別に回転リングを軸受の両端部に設ける必要があるため、部品点数の増加などを招くという欠点があった。
実開平２−１８９２６号公報 The following Patent Document 1 discloses a rotating ring provided separately from the sealing device, in which a groove or a convex portion is provided to prevent water and the like from entering the bearing. The thing described in the literature 1 had the fault of causing the increase in a number of parts, etc., since it was necessary to provide a rotating ring in the both ends of a bearing separately from a sealing device.
Japanese Utility Model Publication No. 2-18926

上述したように、従来の転がり軸受用密封装置においては、環状シール体に付着した液体がシールリップ部と固定側軌道輪との間から軸受内部に浸入するおそれがあった。
本発明は、上述した問題点に着目してなされたものであり、シール体に付着した液体が軸受内部に浸入することを防止することのできる転がり軸受用密封装置を提供することを目的とするものである。 As described above, in the conventional rolling bearing sealing device, there is a possibility that the liquid adhering to the annular seal body may enter the bearing from between the seal lip portion and the stationary bearing ring.
The present invention has been made paying attention to the above-described problems, and an object thereof is to provide a rolling bearing sealing device capable of preventing liquid adhering to a seal body from entering the inside of the bearing. Is.

上記の目的を達成するために、請求項１の発明に係る転がり軸受用密封装置は、固定側軌道輪と、該固定側軌道輪の外周側または内周側に設けられた回転側軌道輪と、該回転側軌道輪と前記固定側軌道輪との間に転動自在に設けられた複数の転動体とを有する転がり軸受に用いられ、前記固定側軌道輪と前記回転側軌道輪との間の空隙部を環状に形成されたシール体により密封する転がり軸受用密封装置において、前記シール体に付着した液体の流れを円周方向以外の方向に変更する流れ方向変更手段を、前記シール体の外側表面部に設けたことを特徴とする。   In order to achieve the above object, a rolling bearing sealing device according to the invention of claim 1 includes a fixed-side bearing ring, and a rotating-side bearing ring provided on an outer peripheral side or an inner peripheral side of the fixed-side bearing ring. And a rolling bearing having a plurality of rolling elements provided between the rotation side raceway and the fixed side raceway so as to freely roll between the fixed side raceway and the rotation side raceway. In the rolling bearing sealing device that seals the gap portion of the sealing member with an annularly formed sealing body, flow direction changing means for changing the flow of the liquid attached to the sealing body in a direction other than the circumferential direction is provided on the sealing body. It is provided on the outer surface portion.

請求項２の発明に係る転がり軸受用密封装置は、請求項１記載の転がり軸受用密封装置において、前記流れ方向変更手段が前記シール体の外側表面部に線状に設けられた複数または単一の堰または凹部であることを特徴とする。
請求項３の発明に係る転がり軸受用密封装置は、請求項２記載の転がり軸受用密封装置において、前記複数の堰または凹部が前記シール体の外側表面部に放射線状に設けられていることを特徴とする。 A rolling bearing sealing device according to a second aspect of the present invention is the rolling bearing sealing device according to the first aspect, wherein the flow direction changing means is a plurality or a single unit provided linearly on the outer surface of the seal body. It is characterized by being a weir or a recessed part.
A rolling bearing sealing device according to a third aspect of the present invention is the rolling bearing sealing device according to the second aspect, wherein the plurality of weirs or recesses are provided radially on the outer surface portion of the seal body. Features.

請求項４の発明に係る転がり軸受用密封装置は、請求項２記載の転がり軸受用密封装置において、前記複数の堰が前記シール体の外側表面部に星形に設けられていることを特徴とする。
請求項５の発明に係る転がり軸受用密封装置は、請求項２記載の転がり軸受用密封装置において、前記堰または凹部が前記シール体の外側表面部に曲線状に形成されていることを特徴とする。
請求項６の発明に係る転がり軸受用密封装置は、請求項２記載の転がり軸受用密封装置において、前記単一の堰または凹部が前記シール体の外側表面部に渦巻き状に設けられていることを特徴とする。 A rolling bearing sealing device according to a fourth aspect of the present invention is the rolling bearing sealing device according to the second aspect, wherein the plurality of weirs are provided in a star shape on an outer surface portion of the seal body. To do.
A rolling bearing sealing device according to a fifth aspect of the present invention is the rolling bearing sealing device according to the second aspect, wherein the weir or the recess is formed in a curved shape on the outer surface portion of the seal body. To do.
A rolling bearing sealing device according to a sixth aspect of the present invention is the rolling bearing sealing device according to the second aspect, wherein the single weir or recess is provided in a spiral shape on the outer surface portion of the seal body. It is characterized by.

本発明に係る転がり軸受用密封装置では、シール体の外表面部に付着した液体の流れが流れ方向変更手段によりシール体の円周方向以外の方向に変更されるので、シール体に付着した液体が軸受内部に浸入することを防止することができる。   In the rolling bearing sealing device according to the present invention, the flow of the liquid adhering to the outer surface portion of the seal body is changed by the flow direction changing means in a direction other than the circumferential direction of the seal body. Can be prevented from entering the inside of the bearing.

以下、図１〜図１４を参照して本発明の実施の形態について説明する。
図１において符号３０は本発明の第１の実施形態に係る外輪回転の転がり軸受用密封装置であって、この密封装置３０は、円環状に形成された金属板１１（図２参照）の片側表面部に、ゴムなどの軟質材からなる環状シール体１２を固着して構成されている。
環状シール体１２はその外側周縁部（または内側周縁部）に固定部１３を有しており、転がり軸受の回転側軌道輪には、上記固定部１３と嵌合する密封装置取付溝（図示せず）が形成されている。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.
In FIG. 1, reference numeral 30 denotes a rolling bearing sealing device for outer ring rotation according to the first embodiment of the present invention, and this sealing device 30 is one side of a metal plate 11 (see FIG. 2) formed in an annular shape. An annular seal body 12 made of a soft material such as rubber is fixed to the surface portion.
The annular seal body 12 has a fixed portion 13 at the outer peripheral edge (or inner peripheral edge) thereof, and a sealing device mounting groove (not shown) that fits with the fixed portion 13 is provided on the rotating side race of the rolling bearing. ) Is formed.

また、環状シール体１２は固定部１３と反対側の周縁部にシールリップ部１４を有している。このシールリップ部１４は主リップ１４ａと外側リップ１４ｂとからなり、転がり軸受の回転側軌道輪と固定側軌道輪との間の空隙部は、シールリップ部１４の主リップ１４ａと外側リップ１４ｂが固定側軌道輪に接触または固定側軌道輪との間にラビリンスシールを形成することによって密封されるようになっている。   Further, the annular seal body 12 has a seal lip portion 14 on the peripheral edge opposite to the fixed portion 13. The seal lip portion 14 is composed of a main lip 14a and an outer lip 14b, and a gap between the rotating side raceway and the fixed side raceway of the rolling bearing is formed by the main lip 14a and the outer lip 14b of the seal lip portion 14. It is sealed by forming a labyrinth seal in contact with or between the fixed side race and the fixed side race.

環状シール体１２の外側表面部１２ａには、直線状に形成された複数（例えば四つ）の堰（線状凸部）１５が流れ方向変更手段として設けられている。これらの堰１５は環状シール体１２の外側表面部１２ａに放射線状に設けられ、その高さは堰１５の上端が軌道輪の側面部２３（図１４参照）より突出しない程度の高さ（例えば、０．１〜０．３ｍｍ）となっている。また、堰１５は環状シール体１２の円周方向に等間隔もしくは不規則的に設けられている。   On the outer surface portion 12a of the annular seal body 12, a plurality of (for example, four) weirs (linear convex portions) 15 formed linearly are provided as flow direction changing means. These weirs 15 are provided radially on the outer surface portion 12a of the annular seal body 12, and the height thereof is such that the upper end of the weir 15 does not protrude from the side surface portion 23 (see FIG. 14) of the raceway ring (for example, 0.1 to 0.3 mm). Further, the weirs 15 are provided at regular intervals or irregularly in the circumferential direction of the annular seal body 12.

このような構成において、転がり軸受の回転側軌道輪が回転している時に水などの液体が環状シール体１２の外側表面部１２ａに付着すると、環状シール体１２の外側表面部１２ａに付着した液体が環状シール体１２の円周方向に流れようとする。このとき、本発明の第１の実施形態では、環状シール体１２の外側表面部１２ａに設けられた複数の堰１５によって液体の流れが円周方向以外の方向、具体的には環状シール体１２の円周方向から外径方向に変更される。したがって、前述した従来例のように、環状シール体１２の外側表面部１２ａに付着した液体が円周方向に流れることがないので、環状シール体１２に付着した液体が外側リップ１４ｂと固定側軌道輪との間から軸受内部に浸入することを防止することができる。   In such a configuration, when a liquid such as water adheres to the outer surface portion 12a of the annular seal body 12 while the rotation side race of the rolling bearing is rotating, the liquid attached to the outer surface portion 12a of the annular seal body 12 Tends to flow in the circumferential direction of the annular seal body 12. At this time, in the first embodiment of the present invention, the flow of the liquid is directed in a direction other than the circumferential direction by the plurality of weirs 15 provided on the outer surface portion 12 a of the annular seal body 12, specifically, the annular seal body 12. Is changed from the circumferential direction to the outer diameter direction. Therefore, unlike the above-described conventional example, the liquid adhering to the outer surface portion 12a of the annular seal body 12 does not flow in the circumferential direction, so that the liquid adhering to the annular seal body 12 is in contact with the outer lip 14b and the fixed side track. It is possible to prevent the inside of the bearing from entering between the rings.

また、上述した第１の実施形態では、環状シール体１２の外側表面部１２ａに複数の堰１５を放射線状に設けたことで、環状シール体１２の外側表面部１２ａに付着した液体が遠心力の作用により外側リップ１４ｂと反対側の径方向に流れるため、軸受内部への液体の浸入を確実に防止することができる。
図１及び図２に示した第１の実施形態では環状シール体１２の外側表面部１２ａに四つ堰１５を設けた場合を例示したが、堰１５の数は四つに限られるものではなく、五つ以上あるいは一つの堰１５を環状シール体１２の外側表面部１２ａに設けても第１の実施形態と同様の効果を得ることができる。
また、上述した第１の実施形態では固定部１３を除いた環状シール体１２の外側表面部１２ａに複数の堰１５を放射線状に設けたが、図３及び図４に示す第２の実施形態のように、堰１５の長さを第１の実施形態よりも短くし、シールリップ部１４の外側表面部のみに複数の堰１５を放射線状に設けてもよい。 In the first embodiment described above, the plurality of weirs 15 are provided radially on the outer surface portion 12a of the annular seal body 12, so that the liquid adhering to the outer surface portion 12a of the annular seal body 12 is subjected to centrifugal force. As a result, the liquid flows in the radial direction opposite to the outer lip 14b, so that liquid can be reliably prevented from entering the bearing.
In the first embodiment shown in FIGS. 1 and 2, the case where the four weirs 15 are provided on the outer surface portion 12a of the annular seal body 12 is illustrated, but the number of the weirs 15 is not limited to four. Even if five or more or one weir 15 is provided on the outer surface portion 12a of the annular seal body 12, the same effect as in the first embodiment can be obtained.
Further, in the first embodiment described above, the plurality of weirs 15 are provided radially on the outer surface portion 12a of the annular seal body 12 excluding the fixing portion 13, but the second embodiment shown in FIGS. As described above, the length of the weir 15 may be shorter than that of the first embodiment, and the plurality of weirs 15 may be provided radially only on the outer surface portion of the seal lip portion 14.

図５は本発明の第３の実施形態を示す図であり、この第３の実施形態が第１の実施形態と異なる点は、堰１５の長さを第１の実施形態よりも長く、固定部１３を含む環状シール体１２の外側表面部１２ａに複数の堰１５を放射線状に設けた点である。このような構成によると、環状シール体１２の外側表面部１２ａに付着した液体の流れが堰１５により円周方向以外の方向に変更されるので、第１の実施形態と同様に、環状シール体１２に付着した液体が外側リップ１４ｂと固定側軌道輪との間から軸受内部に侵入することを防止することができる。   FIG. 5 is a diagram showing a third embodiment of the present invention. The third embodiment is different from the first embodiment in that the length of the weir 15 is longer than that of the first embodiment and is fixed. This is that a plurality of weirs 15 are provided radially on the outer surface portion 12 a of the annular seal body 12 including the portion 13. According to such a configuration, since the flow of the liquid attached to the outer surface portion 12a of the annular seal body 12 is changed by the weir 15 in a direction other than the circumferential direction, the annular seal body is the same as in the first embodiment. 12 can be prevented from entering the inside of the bearing from between the outer lip 14b and the stationary race.

上述した第１〜第３の実施形態では環状シール体１２の外側表面部１２ａに複数の堰１５を放射線状に設けた場合を示したが、必ずしも放射線状に設ける必要はない。たとえば、環状シール体１２の外側表面部１２ａに複数の堰１５を図６のように設けてもよく、あるいは図７及び図８に示すように、環状シール体１２の外側表面部１２ａに複数の堰１５を星形あるいはアルファベット形に設けてもよい。   Although the case where the plurality of weirs 15 are provided radially on the outer surface portion 12a of the annular seal body 12 has been described in the first to third embodiments described above, it is not always necessary to provide them radially. For example, a plurality of weirs 15 may be provided on the outer surface portion 12a of the annular seal body 12 as shown in FIG. 6, or a plurality of weirs 15 may be provided on the outer surface portion 12a of the annular seal body 12 as shown in FIGS. The weirs 15 may be provided in a star shape or alphabet shape.

また、第１〜第３の実施形態では環状シール体１２の外側表面部に設けられる堰（線状凸部）１５として直線状のものを例示したが、図９に示すように、堰１５が曲線状に形成されていてもよい。
さらに、第１〜第３の実施形態では環状シール体１２の外側表面部に複数の堰１５を設けた場合を例示したが、必ずしも複数である必要はなく、たとえば図１０に示すように、環状シール体１２の外側表面部１２に単一の堰１５を渦巻き状に設けてもよい。 Moreover, although the linear thing was illustrated as the dam (linear convex part) 15 provided in the outer surface part of the cyclic | annular seal body 12 in the 1st-3rd embodiment, as shown in FIG. It may be formed in a curved shape.
Furthermore, in the first to third embodiments, the case where a plurality of weirs 15 are provided on the outer surface portion of the annular seal body 12 is exemplified, but it is not always necessary to provide a plurality, for example, as shown in FIG. A single weir 15 may be provided in a spiral shape on the outer surface portion 12 of the seal body 12.

図１１及び図１２は本発明の第８の実施形態を示す図であり、この第８の実施形態が第１の実施形態と異なる点は、環状シール体１２の外側表面部１２ａに複数の線状凹部１６を放射線状に設けた点である。このような構成によると、環状シール体１２の外側表面部１２ａに付着した液体の流れが線状凹部１６により円周方向以外の方向に変更されるので、第１の実施形態と同様に、環状シール体１２に付着した液体が外側リップ１４ｂと固定側軌道輪との間から軸受内部に侵入することを防止することができる。   FIGS. 11 and 12 are views showing an eighth embodiment of the present invention. The eighth embodiment is different from the first embodiment in that a plurality of lines are formed on the outer surface portion 12a of the annular seal body 12. FIG. This is that the concave portions 16 are provided radially. According to such a configuration, the flow of the liquid adhering to the outer surface portion 12a of the annular seal body 12 is changed by the linear recess 16 in a direction other than the circumferential direction. It is possible to prevent the liquid adhering to the seal body 12 from entering the inside of the bearing from between the outer lip 14b and the fixed-side race.

上述した第８の実施形態では環状シール体１２の外側表面部１２ａに複数の線状凹部１６を放射線状に設けたが、これに限定されるものではなく、図１３に示す第９の実施形態のように、環状シール体１２の外側表面部１２ａに単一の線状凹部１６を渦巻き状に設けてもよい。
上述した各実施形態ではシールリップ部１４が環状シール体１２の内側周縁部に形成されている密封装置に本発明を適用した場合を例示したが、本発明はこれに限定されるものではなく、シールリップ部１４が環状シール体１２の外側周縁部に形成されている密封装置についても本発明を適用することが可能である。
また、環状シール体がゴムなどの軟質材からなる密封装置に本発明を適用した場合を例示したが、いわゆるプラスチックシールと称される密封装置についても本発明を適用することが可能である。 In the eighth embodiment described above, the plurality of linear concave portions 16 are provided radially on the outer surface portion 12a of the annular seal body 12, but the present invention is not limited to this, and the ninth embodiment shown in FIG. As described above, the single linear recess 16 may be provided in a spiral shape on the outer surface portion 12 a of the annular seal body 12.
In each of the above-described embodiments, the case where the present invention is applied to the sealing device in which the seal lip portion 14 is formed on the inner peripheral edge of the annular seal body 12 is illustrated, but the present invention is not limited thereto. The present invention can also be applied to a sealing device in which the seal lip portion 14 is formed on the outer peripheral edge portion of the annular seal body 12.
Moreover, although the case where this invention was applied to the sealing device which an annular sealing body consists of soft materials, such as rubber | gum, was illustrated, this invention is applicable also to the sealing device called what is called a plastic seal.

本発明の第１の実施形態に係る転がり軸受用密封装置の正面図である。1 is a front view of a rolling bearing sealing device according to a first embodiment of the present invention. 図１のＡ−Ａ線に沿う断面図である。It is sectional drawing which follows the AA line of FIG. 本発明の第２の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 2nd Embodiment of this invention. 図３のＢ−Ｂ線に沿う断面図である。It is sectional drawing which follows the BB line of FIG. 本発明の第３の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 3rd Embodiment of this invention. 本発明の第４の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 4th Embodiment of this invention. 本発明の第５の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings which concerns on the 5th Embodiment of this invention. 本発明の第６の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 6th Embodiment of this invention. 本発明の第７の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 7th Embodiment of this invention. 本発明の第８の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 8th Embodiment of this invention. 本発明の第９の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 9th Embodiment of this invention. 図１１のＣ−Ｃ線に沿う断面図である。It is sectional drawing which follows the CC line of FIG. 本発明の第１０の実施形態に係る転がり軸受用密封装置の正面図である。It is a front view of the sealing device for rolling bearings concerning the 10th Embodiment of this invention. 従来の密封装置を備えた転がり軸受の断面図である。It is sectional drawing of the rolling bearing provided with the conventional sealing device. 図１４に示す転がり軸受用密封装置の断面図である。It is sectional drawing of the sealing device for rolling bearings shown in FIG. 従来の転がり軸受用密封装置の環状シール体に水などの液体が付着した状態を示す図である。It is a figure which shows the state which liquids, such as water, adhered to the cyclic | annular seal body of the conventional sealing device for rolling bearings.

符号の説明Explanation of symbols

１１ 金属板
１２ 環状シール体
１３ 固定部
１４ シールリップ部
１４ａ 主リップ
１４ｂ 外側リップ
１５ 堰
１６ 線状凹部
２０ 転がり軸受
２１ 回転側軌道輪（外側軌道輪）
２２ 固定側軌道輪（内側軌道輪） DESCRIPTION OF SYMBOLS 11 Metal plate 12 Annular seal body 13 Fixed part 14 Seal lip part 14a Main lip 14b Outer lip 15 Weir 16 Linear recessed part 20 Rolling bearing 21 Rotating side race ring (outer race ring)
22 Fixed side race (Inner race)

Claims (6)

固定側軌道輪と、該固定側軌道輪の外周側または内周側に設けられた回転側軌道輪と、該回転側軌道輪と前記固定側軌道輪との間に転動自在に設けられた複数の転動体とを有する転がり軸受に用いられ、前記固定側軌道輪と前記回転側軌道輪との間の空隙部を環状に形成されたシール体により密封する転がり軸受用密封装置において、
前記シール体に付着した液体の流れを円周方向以外の方向に変更する流れ方向変更手段を、前記シール体の外側表面部に設けたことを特徴とする転がり軸受用密封装置。 The fixed side raceway, the rotation side raceway provided on the outer peripheral side or the inner circumference side of the fixed side raceway, and the roll side raceway provided between the rotation side raceway and the fixed side raceway. In a rolling bearing sealing device that is used in a rolling bearing having a plurality of rolling elements, and seals a gap between the fixed-side raceway and the rotation-side raceway with an annularly formed seal body,
A rolling bearing sealing device, characterized in that flow direction changing means for changing a flow of a liquid attached to the seal body in a direction other than a circumferential direction is provided on an outer surface portion of the seal body. 請求項１記載の転がり軸受用密封装置において、前記流れ方向変更手段が前記シール体の外側表面部に線状に設けられた複数または単一の堰または凹部であることを特徴とする転がり軸受用密封装置。   2. The rolling bearing sealing device according to claim 1, wherein the flow direction changing means is a plurality of or a single weir or a recess provided linearly on the outer surface portion of the seal body. Sealing device. 請求項２記載の転がり軸受用密封装置において、前記複数の堰または凹部が前記シール体の外側表面部に放射線状に設けられていることを特徴とする転がり軸受用密封装置。   The rolling bearing sealing device according to claim 2, wherein the plurality of weirs or recesses are provided radially on the outer surface portion of the seal body. 請求項２記載の転がり軸受用密封装置において、前記複数の堰が前記シール体の外側表面部に星形に設けられていることを特徴とする転がり軸受用密封装置。   3. The rolling bearing sealing device according to claim 2, wherein the plurality of weirs are provided in a star shape on an outer surface portion of the seal body. 請求項２記載の転がり軸受用密封装置において、前記堰または凹部が前記シール体の外側表面部に曲線状に設けられていることを特徴とする転がり軸受用密封装置。   3. The rolling bearing sealing device according to claim 2, wherein the weir or the concave portion is provided in a curved shape on an outer surface portion of the seal body. 請求項２記載の転がり軸受用密封装置において、前記単一の堰または凹部が前記シール体の外側表面部に渦巻き状に設けられていることを特徴とする転がり軸受用密封装置。   3. The rolling bearing sealing device according to claim 2, wherein the single weir or the concave portion is provided in a spiral shape on an outer surface portion of the seal body.
JP2006012538A 2006-01-20 2006-01-20 Sealing device for rolling bearing Pending JP2007192356A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08254123A (en) * 1995-03-20 1996-10-01 Mitsubishi Motors Corp Combustion chamber of internal combustion engine
JPH08254213A (en) * 1995-03-17 1996-10-01 Koyo Seiko Co Ltd Sealing device for bearing for water pump
JP2002266880A (en) * 2001-03-05 2002-09-18 Minebea Co Ltd Seal structure of ball bearing
JP2003139150A (en) * 2001-11-05 2003-05-14 Ntn Corp Rolling bearing
JP2005226826A (en) * 2004-01-14 2005-08-25 Nsk Ltd Rolling bearing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH08254213A (en) * 1995-03-17 1996-10-01 Koyo Seiko Co Ltd Sealing device for bearing for water pump
JPH08254123A (en) * 1995-03-20 1996-10-01 Mitsubishi Motors Corp Combustion chamber of internal combustion engine
JP2002266880A (en) * 2001-03-05 2002-09-18 Minebea Co Ltd Seal structure of ball bearing
JP2003139150A (en) * 2001-11-05 2003-05-14 Ntn Corp Rolling bearing
JP2005226826A (en) * 2004-01-14 2005-08-25 Nsk Ltd Rolling bearing

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