JP2006010043A - Sealed type bearing unit - Google Patents

Sealed type bearing unit Download PDF

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Publication number
JP2006010043A
JP2006010043A JP2004191684A JP2004191684A JP2006010043A JP 2006010043 A JP2006010043 A JP 2006010043A JP 2004191684 A JP2004191684 A JP 2004191684A JP 2004191684 A JP2004191684 A JP 2004191684A JP 2006010043 A JP2006010043 A JP 2006010043A
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Japan
Prior art keywords
seal
bearing
partition plate
elastic
elastic seal
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Withdrawn
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JP2004191684A
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Japanese (ja)
Inventor
Masanori Ueno
正典 上野
Shiro Ishikawa
司郎 石川
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2004191684A priority Critical patent/JP2006010043A/en
Publication of JP2006010043A publication Critical patent/JP2006010043A/en
Withdrawn legal-status Critical Current

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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
    • F16C33/7803—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings for tapered roller 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a lubricant filled up in a bearing unit from leaking to the outside of the bearing unit by surging a large quantity of the lubricant into an elastic seal. <P>SOLUTION: The elastic seal 16 is arranged on a seal case 15 mounted on an unillustrated axle box via an outer ring 12. An opening 19 of the bearing unit is blocked by making the elastic seal 16 come in sliding contact with a rotary member 17 which is adjacent to an inner ring 11 and is mounted on an unillustrated rotary shaft, and a partition plate 20 extending inward in a radial direction of the bearing unit is arranged on a location, which is an inner periphery of the seal case 15, in the inside of the bearing unit rather than the elastic seal 16. Further, a large quantity of the lubricant is limited to surge to the elastic seal 16 so that a seal member 20c forming a contact seal or a non-contact seal between the partition plate 20 and the rotary member 17 is arranged on an inner periphery of the partition plate 20. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、軸受内部への異物侵入及び軸受内部からの潤滑剤漏れを防止した密封型軸受装置に関し、特に潤滑剤漏れの防止に関するものである。   The present invention relates to a sealed bearing device that prevents foreign matter from entering the inside of the bearing and lubricant leakage from the inside of the bearing, and more particularly to prevention of lubricant leakage.

図４は、鉄道車両等の車軸支持に使用される従来の密封型軸受装置を示している。図４の密封型軸受装置は、図示外の車軸に嵌合させる一対の内輪１１，１１と、図示外の軸箱に嵌合固定させる外輪１２と、内輪１１，１１及び外輪１２間に転動自在に介在する複列の転動体１３，１３，…と、各列の転動体１３，１３，…を軸受周方向に所定の間隔で保持する保持器１４，１４とを主要な構成要素としている。   FIG. 4 shows a conventional sealed bearing device used for supporting an axle of a railway vehicle or the like. 4 seals a pair of inner rings 11 and 11 fitted to an unillustrated axle, an outer ring 12 fitted and fixed to an unillustrated axle box, and rolling between the inner rings 11 and 11 and the outer ring 12. The main components are the double-row rolling elements 13, 13,... That intervene freely and the cages 14, 14 that hold the rolling elements 13, 13,. .

ところで、この種の密封型軸受装置は、軸受内部にグリース等の潤滑剤を充填して使用されるため、軸受内部への異物侵入や潤滑剤漏れによる潤滑不良の発生を防止する必要がある。このため、外輪１２を介して図示外の軸箱に取付けられるシールケース１５，１５に弾性シール１６，１６を設け、弾性シール１６，１６を内輪１１，１１に隣接する油切りや後蓋等の回転部材１７，１７に設けたスリーブ１８，１８に摺接させて軸受開口部１９，１９を閉塞してある（例えば特許文献１参照）。   By the way, since this type of sealed bearing device is used by filling a lubricant such as grease inside the bearing, it is necessary to prevent the occurrence of poor lubrication due to the entry of foreign matter into the bearing or leakage of the lubricant. For this reason, elastic seals 16 and 16 are provided in seal cases 15 and 15 attached to a shaft box (not shown) via the outer ring 12, and the elastic seals 16 and 16 are disposed on the inner rings 11 and 11, such as an oil drain or a rear cover. The bearing openings 19 and 19 are closed by sliding contact with sleeves 18 and 18 provided on the rotating members 17 and 17 (see, for example, Patent Document 1).

また、シールケース１５，１５の内周部であって弾性シール１６，１６よりも軸受内部側の部位に、軸受半径方向内側へ延在する仕切板２０，２０を設け、仕切板２０，２０の内周部を回転部材１７，１７のスリーブ１８，１８に近接させることにより、軸受内部の潤滑剤が弾性シール１６，１６へ大量に押し寄せるのを抑制している。
特開平９−６８２３２号公報 In addition, partition plates 20 and 20 extending inward in the bearing radial direction are provided on the inner peripheral portions of the seal cases 15 and 15 and on the bearing inner side of the elastic seals 16 and 16. By bringing the inner peripheral portion close to the sleeves 18, 18 of the rotating members 17, 17, a large amount of the lubricant inside the bearing is suppressed from being pushed toward the elastic seals 16, 16.
JP-A-9-68232

しかし、上記の密封型軸受装置は、使用条件によっては、軸受内部の潤滑剤がスリーブ１８，１８と仕切板２０，２０との間に形成された隙間を通過して弾性シール１６，１６へ大量に押し寄せることがある。大量の潤滑剤が弾性シール１６，１６へ押し寄せると、潤滑剤漏れが発生する。   However, in the above-described sealed bearing device, depending on the use conditions, a large amount of lubricant inside the bearing passes through the gap formed between the sleeves 18 and 18 and the partition plates 20 and 20 to the elastic seals 16 and 16. May be rushed to. When a large amount of lubricant is pushed toward the elastic seals 16 and 16, lubricant leakage occurs.

本発明は、かかる実情に鑑み創案されたものであって、その目的は、軸受内部に充填したグリース等の潤滑剤が弾性シールへ大量に押し寄せないようにして、潤滑剤漏れを防止し、軸受の潤滑状態を良好な状態に維持することができる密封型軸受装置を提供することにある。   The present invention was devised in view of such circumstances, and an object of the present invention is to prevent lubricant leakage by preventing a large amount of lubricant such as grease filled in the bearing from pushing against the elastic seal. Another object of the present invention is to provide a sealed bearing device that can maintain a good lubrication state.

本発明に係る密封型転がり軸受は、上記目的を達成するため、回転軸に嵌合させる内輪と、外輪と、内輪及び外輪間に転動自在に介在する複数個の転動体と、複数個の転動体を軸受周方向に所定の間隔で保持する保持器とを具備し、外輪に取付けられるシールケースの内周部に弾性シールを設け、弾性シールを内輪及び／又は内輪に隣接して回転軸に取付けられる回転部材に摺接させて軸受開口部を閉塞すると共に、シールケースの内周部であって弾性シールよりも軸受内部側の部位に、シールケースの内周部から軸受半径方向内側へ延在する仕切板を設け、仕切板の内周部を内輪及び／又は回転部材の外周部に近接させて軸受内部の潤滑剤が弾性シールへ押し寄せるのを抑制した密封型転がり軸受において、仕切板の内周部に、内輪及び／又は回転部材との間で接触シール又は非接触シールを形成するシール部材を設けたことを特徴としている。   In order to achieve the above object, a sealed type rolling bearing according to the present invention includes an inner ring fitted to a rotating shaft, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring, and a plurality of rolling elements. A cage that holds the rolling elements at a predetermined interval in the circumferential direction of the bearing, and an elastic seal is provided on an inner peripheral portion of a seal case attached to the outer ring, and the elastic seal is a rotating shaft adjacent to the inner ring and / or the inner ring. The bearing opening is closed by sliding contact with a rotating member attached to the inner surface of the seal case, and is located on the inner periphery of the seal case and on the inner side of the bearing from the elastic seal, from the inner periphery of the seal case to the inside in the bearing radial direction. In a sealing type rolling bearing provided with an extending partition plate, the inner peripheral portion of the partition plate is brought close to the outer periphery of the inner ring and / or the rotating member, and the lubricant inside the bearing is prevented from pressing against the elastic seal. On the inner periphery of the inner ring and / or It is characterized in that a sealing member forming a contact seal or a non-contact seal between the rotating member.

上記の密封型転がり軸受は、シールケースの内周部であって弾性シールよりも軸受内部側の部位に、シールケースの内周部から軸受半径方向内側へ延在する仕切板を設けると共に、仕切板の内周部に、回転部材との間で接触シール又は非接触シールを形成するシール部材を設けているので、軸受内部の潤滑剤が仕切板を越えて大量に弾性シールへ押し寄せるのを抑制している。このように、大量の潤滑剤が弾性シールへ押し寄せるのを抑制することで、軸受内部からの潤滑剤漏れを防止することができる。   The above-mentioned sealed type rolling bearing is provided with a partition plate extending from the inner periphery of the seal case to the inside in the bearing radial direction at the inner periphery of the seal case and on the inner side of the bearing relative to the elastic seal. Since a seal member that forms a contact seal or non-contact seal with the rotating member is provided on the inner periphery of the plate, it prevents the lubricant inside the bearing from pushing over the partition plate in large quantities. is doing. In this way, it is possible to prevent the lubricant from leaking from the inside of the bearing by suppressing a large amount of the lubricant from being pushed toward the elastic seal.

本発明に係る密封型軸受装置によれば、軸受内部の潤滑剤が弾性シール側へ大量に押し寄せるのを抑制することで、潤滑剤漏れを防止し、軸受の潤滑状態を良好な状態に維持することができる。   According to the sealed bearing device of the present invention, the lubricant in the bearing is prevented from being pushed in a large amount toward the elastic seal side, thereby preventing lubricant leakage and maintaining the lubrication state of the bearing in a good state. be able to.

以下、添付図面を参照しつつ本発明に係る密封型軸受装置の一実施形態について説明する。なお、本実施形態では、従来例と同一部位には同一符号を付して説明する。   Hereinafter, an embodiment of a sealed bearing device according to the present invention will be described with reference to the accompanying drawings. In the present embodiment, the same parts as those in the conventional example will be described with the same reference numerals.

図１は、本発明に係る密封型軸受装置の一実施形態を例示する縦断面図であって、従来例と同様に、本発明を鉄道車両等の車軸支持に適用したものを示している。本実施形態に係る密封型軸受装置は、一対の内輪１１，１１と外輪１２との間に複列の転動体１３，１３，…を転動自在に介在させ、各列の転動体１３，１３，…を保持器１４，１４によって軸受周方向に所定の間隔で保持してある。外輪１２の両端部には、シールケース１５，１５の一端を嵌合固定して、外輪１２を介してシールケース１５，１５を図示外の軸箱に取付け固定してある。シールケース１５，１５は、一端側から他端側へ向かって小径となる多段円筒状に形成された部材である。シールケース１５，１５の内周部には、他端側から順に弾性シール１６，１６と仕切板２０，２０を設けてある。   FIG. 1 is a longitudinal cross-sectional view illustrating an embodiment of a sealed bearing device according to the present invention, and shows a structure in which the present invention is applied to an axle support of a railway vehicle or the like, as in a conventional example. In the sealed bearing device according to the present embodiment, a plurality of rolling elements 13, 13,... Are movably interposed between the pair of inner rings 11, 11 and the outer ring 12, and the rolling elements 13, 13 in each row are inserted. Are held at predetermined intervals in the bearing circumferential direction by the cages 14 and 14. One end of seal cases 15 and 15 is fitted and fixed to both ends of the outer ring 12, and the seal cases 15 and 15 are attached and fixed to a shaft box (not shown) via the outer ring 12. The seal cases 15 and 15 are members formed in a multistage cylindrical shape having a small diameter from one end side to the other end side. Elastic seals 16 and 16 and partition plates 20 and 20 are provided in order from the other end side on the inner periphery of the seal cases 15 and 15.

図２は、図１の要部拡大図である。以下、図２を参照して、弾性シール１６及び仕切板２０について詳述する。   FIG. 2 is an enlarged view of a main part of FIG. Hereinafter, the elastic seal 16 and the partition plate 20 will be described in detail with reference to FIG.

図２に示すように、弾性シール１６は、シールケース１５に内嵌させる芯金１６ａと、芯金１６ａに固着したゴムや合成樹脂等の弾性材からなるリップ部材１６ｂとを有する。リップ部材１６ｂは、内輪１１に隣接して図示外の車軸に取付けられる回転部材１７に設けたスリーブ１８に摺接させる第１のリップ１６ｂ１，１６ｂ１と、スリーブ１８に近接させる第２のリップ１６ｂ２とを有する。スリーブ１８は、回転部材１７に外嵌させると共にリップ部材１６ｂの第１のリップ１６ｂ１，１６ｂ１を摺接させる嵌合部１８ａと、嵌合部１８ａの軸受とは反対側の端部から軸受半径方向外側へ延在させてリップ部材１６ｂの第２のリップ１６ｂ２に近接させる環状フランジ部１８ｂとを有し、環状フランジ部１８ｂの外周面とシールケース１５の他端内周面との間でラビリンスシールＳ1を形成している。 As shown in FIG. 2, the elastic seal 16 includes a cored bar 16a fitted into the seal case 15, and a lip member 16b made of an elastic material such as rubber or synthetic resin fixed to the cored bar 16a. The lip member 16b includes first lips 16b1 and 16b1 that are slidably contacted with a sleeve 18 provided on a rotating member 17 that is attached to an axle (not shown) adjacent to the inner ring 11, and a second lip 16b2 that is adjacent to the sleeve 18. Have The sleeve 18 is externally fitted to the rotating member 17 and has a fitting portion 18a for slidingly contacting the first lips 16b1 and 16b1 of the lip member 16b, and a bearing radial direction from the end of the fitting portion 18a opposite to the bearing. A labyrinth seal between the outer peripheral surface of the annular flange portion 18b and the inner peripheral surface of the other end of the seal case 15 having an annular flange portion 18b that extends outward and approaches the second lip 16b2 of the lip member 16b. S 1 is formed.

仕切板２０は、図２に示すように、弾性シール１６の芯金１６ａを介してシールケース１５に内嵌させる嵌合部２０ａと、弾性シール１６のリップ部材１６ｂとスリーブ１８の摺接部位よりも軸受内部側で嵌合部２０ａから軸受半径方向内側へ延在する円板部２０ｂとを有し、円板部２０ｂの内周部にシール部材２０ｃを設けてある。シール部材２０ｃは、回転部材１７に設けたスリーブ１８の嵌合部１８ａに軽接触するように環状に形成された部材で、ゴムや合成樹脂等の弾性材で構成してある。   As shown in FIG. 2, the partition plate 20 includes a fitting portion 20 a that is fitted into the seal case 15 via a core 16 a of the elastic seal 16, and a sliding contact portion between the lip member 16 b of the elastic seal 16 and the sleeve 18. And a disc portion 20b extending inward in the bearing radial direction from the fitting portion 20a on the inner side of the bearing, and a seal member 20c is provided on the inner peripheral portion of the disc portion 20b. The seal member 20c is a member formed in an annular shape so as to lightly contact the fitting portion 18a of the sleeve 18 provided on the rotating member 17, and is made of an elastic material such as rubber or synthetic resin.

このように、仕切板２０の内周部に設けたシール部材２０ｃをスリーブ１８に軽接触させることで、軸受内部の潤滑材が仕切板２０を越えて大量に弾性シール１６へ押し寄せるのを抑制することができる。   In this way, by making the seal member 20 c provided on the inner peripheral portion of the partition plate 20 lightly contact the sleeve 18, it is possible to suppress a large amount of lubricant inside the bearing over the partition plate 20 and pressing toward the elastic seal 16. be able to.

以上、本発明の密封型転がり軸受の一実施形態につき説明したが、本発明は、上記実施形態に限定されることなく種々の変形が可能であって、例えば上記実施形態では、シール部材２０ｃを回転部材１７のスリーブ１８に軽接触させているが、シール部材２０ｃは、図３に示すように、回転部材１７のスリーブ１８に近接させて非接触シールを形成するものであっても構わない。   As described above, the sealed rolling bearing according to the embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, in the above-described embodiment, the seal member 20c is provided. Although light contact is made with the sleeve 18 of the rotating member 17, the seal member 20 c may form a non-contact seal close to the sleeve 18 of the rotating member 17 as shown in FIG. 3.

また、上記実施形態では、シール部材２０ｃの内周面全体を回転部材１７のスリーブ１８に面接触させているが、図３に示すように、シール部材２０ｃの内周面に周方向に延びる溝２０ｃ１を形成してもよい。このように、シール部材２０ｃの内周面に溝２０ｃ１を設けておくと、シール部材２０ｃとスリーブ１８の間に侵入した潤滑剤が溝２０ｃ１によって捕捉され、仕切板２０とスリーブ１８の間を通過し難くなる。すなわち、ラビリンス効果により軸受内部への異物侵入の防止及び潤滑剤漏洩を抑制することができる。なお、溝２０ｃ１は、非接触シールを形成するシール部材２０ｃに限らず、接触シールを形成するシール部材２０ｃ（図２参照）に形成することも可能である。   In the above embodiment, the entire inner peripheral surface of the seal member 20c is in surface contact with the sleeve 18 of the rotating member 17. However, as shown in FIG. 3, a groove extending in the circumferential direction on the inner peripheral surface of the seal member 20c. 20c1 may be formed. Thus, if the groove 20c1 is provided on the inner peripheral surface of the seal member 20c, the lubricant that has entered between the seal member 20c and the sleeve 18 is captured by the groove 20c1 and passes between the partition plate 20 and the sleeve 18. It becomes difficult to do. That is, the labyrinth effect can prevent foreign matter from entering the inside of the bearing and suppress lubricant leakage. The groove 20c1 is not limited to the seal member 20c that forms a non-contact seal, but can also be formed in a seal member 20c (see FIG. 2) that forms a contact seal.

また、上記実施形態では、回転部材１７のスリーブ１８に設けているが、回転部材１７がスリーブ１８を具備していない場合には、シール部材２０ｃの内周面を回転部材１７の外周面に接触又は近接させて接触シール又は非接触シールを形成する。   In the above embodiment, the sleeve 18 of the rotating member 17 is provided. However, when the rotating member 17 does not include the sleeve 18, the inner peripheral surface of the seal member 20 c contacts the outer peripheral surface of the rotating member 17. Alternatively, contact seals or non-contact seals are formed in close proximity.

また、上記実施形態では、弾性シール１６を回転部材１７に取付けたスリーブ１８に摺接させているが、内輪１１の端部を弾性シール１６よりも軸方向外側に延在させてある場合は、弾性シール１６を内輪１１の外周部に摺接することになる。なお、弾性シール１６は、内輪１１及び回転部材１７の両方に摺接するように構成しても構わない。   Further, in the above embodiment, the elastic seal 16 is slidably contacted with the sleeve 18 attached to the rotating member 17, but when the end portion of the inner ring 11 extends axially outward from the elastic seal 16, The elastic seal 16 is brought into sliding contact with the outer peripheral portion of the inner ring 11. The elastic seal 16 may be configured so as to be in sliding contact with both the inner ring 11 and the rotating member 17.

さらに、上記実施形態では、シール部材２０ｃをスリーブ１８に摺接又は近接させているが、内輪１１の端部をシール部材２０ｃよりも軸方向外側に延在させてある場合は、シール部材２０ｃを内輪１１の外周部に摺接又は近接することになる。なお、シール部材２０ｃは、内輪１１及び回転部材１７の両方に摺接又は近接するように構成しても構わない。   Furthermore, in the above-described embodiment, the seal member 20c is slidably contacted or brought close to the sleeve 18, but when the end of the inner ring 11 extends outward in the axial direction from the seal member 20c, the seal member 20c is removed. It will be in sliding contact with or close to the outer periphery of the inner ring 11. The seal member 20c may be configured to be in sliding contact with or close to both the inner ring 11 and the rotating member 17.

本発明に係る密封型軸受装置の一実施形態を示す断面図である。1 is a cross-sectional view showing an embodiment of a sealed bearing device according to the present invention. 図１の要部拡大図である。It is a principal part enlarged view of FIG. 本発明に係る密封型軸受装置の変形例を示す要部拡大断面図である。It is a principal part expanded sectional view which shows the modification of the sealed bearing apparatus which concerns on this invention. 従来の密封型軸受装置の一例を示す断面図である。It is sectional drawing which shows an example of the conventional sealed bearing apparatus.

符号の説明Explanation of symbols

１１ 内輪
１２ 外輪
１３ 転動体
１４ 保持器
１５ シールケース
１６ 弾性シール
１７ 回転部材
１８ スリーブ
１９ 軸受開口部
２０ 仕切板
２０ｃ シール部材
２０ｃ１ 溝 11 Inner ring 12 Outer ring 13 Rolling body 14 Cage 15 Seal case 16 Elastic seal 17 Rotating member 18 Sleeve 19 Bearing opening 20 Partition plate 20c Seal member 20c1 Groove

Claims (2)

回転軸に嵌合させる内輪と、外輪と、内輪及び外輪間に転動自在に介在する複数個の転動体と、複数個の転動体を軸受周方向に所定の間隔で保持する保持器とを具備し、外輪に取付けられるシールケースの内周部に弾性シールを設け、弾性シールを内輪及び／又は内輪に隣接して回転軸に取付けられる回転部材に摺接させて軸受開口部を閉塞すると共に、シールケースの内周部であって弾性シールよりも軸受内部側の部位に、シールケースの内周部から軸受半径方向内側へ延在する仕切板を設け、仕切板の内周部を内輪及び／又は回転部材の外周部に近接させて軸受内部の潤滑剤が弾性シールへ押し寄せるのを抑制した密封型転がり軸受において、
仕切板の内周部に、内輪及び／又は回転部材との間で接触シール又は非接触シールを形成するシール部材を設けたことを特徴とする密封型転がり軸受。 An inner ring fitted to the rotating shaft, an outer ring, a plurality of rolling elements interposed between the inner ring and the outer ring so as to be freely rotatable, and a cage for holding the plurality of rolling elements at a predetermined interval in the bearing circumferential direction. An elastic seal is provided on the inner periphery of the seal case attached to the outer ring, and the elastic seal is slidably contacted with the inner ring and / or the rotary member attached to the rotary shaft adjacent to the inner ring to close the bearing opening. A partition plate extending from the inner periphery of the seal case to the inner side in the bearing radial direction is provided on the inner periphery of the seal case and on the inner side of the bearing relative to the elastic seal, and the inner periphery of the partition plate is connected to the inner ring and In a sealed type rolling bearing in which the lubricant inside the bearing is prevented from pushing toward the elastic seal in the vicinity of the outer peripheral portion of the rotating member,
A sealed rolling bearing, wherein a seal member that forms a contact seal or a non-contact seal with an inner ring and / or a rotating member is provided on an inner peripheral portion of the partition plate. シール部材の内周部に溝を形成したことを特徴とする請求項１に記載の密封型転がり軸受。   The sealed rolling bearing according to claim 1, wherein a groove is formed in an inner peripheral portion of the seal member.
JP2004191684A 2004-06-29 2004-06-29 Sealed type bearing unit Withdrawn JP2006010043A (en)

Priority Applications (1)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7858462B2 (en) 2007-03-14 2010-12-28 Renesas Electronics Corporation Method of manufacturing semiconductor device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7858462B2 (en) 2007-03-14 2010-12-28 Renesas Electronics Corporation Method of manufacturing semiconductor device

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