JP2016014418A - Sealing device of bearing for railway vehicle - Google Patents

Sealing device of bearing for railway vehicle Download PDF

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JP2016014418A
JP2016014418A JP2014135889A JP2014135889A JP2016014418A JP 2016014418 A JP2016014418 A JP 2016014418A JP 2014135889 A JP2014135889 A JP 2014135889A JP 2014135889 A JP2014135889 A JP 2014135889A JP 2016014418 A JP2016014418 A JP 2016014418A
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bearing
sealing device
ring
cylinder part
cylindrical portion
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峰雄 亀子
Mineo Kishi
峰雄 亀子
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NSK Ltd
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NSK Ltd
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  • Rolling Contact Bearings (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide a sealing device of a bearing for a railway vehicle capable of preventing intrusion of water into an inside of the bearing, and capable of preventing rust of the bearing or occurrence of separation.SOLUTION: A sealing device of a bearing for a railway vehicle includes a metal ring fixed on an end of an outer ring of a rolling bearing and having a first cylinder part and a second cylinder part on an axial outer side of the bearing, a core metal provided on an inside diameter of the first cylinder part of the metal ring, and an elastic seal material attached to the core metal and having a lip brought into contact with an outer peripheral surface of a lid member fixed on an axle from a radial outer side. On the lid member, a recessed groove is formed in a portion confronting an end of the second cylinder part, and the end of the second cylinder part 30c is fitted in the recessed groove with a slight gap so that a labyrinth is formed. Thus, intrusion of water into the inside of the rolling bearing can be prevented, and rust of the bearing and occurrence of separation can be prevented.

Description

本発明は、転鉄道車両用軸受の密封装置に関する。   The present invention relates to a sealing device for a rolling rail vehicle bearing.

従来から、鉄道車両用軸受装置としては、図２に示すように、外輪１と、転動体（円錐ころ）２と、内輪３と、間座４と、保持器５とを有する複列円錐ころ軸受６を車軸７に装着し、この軸受６の車軸７についての内端側に後蓋８を配置し、外端側に前蓋９及び油切り１０を配置したものがある。そして、軸受６の前蓋９側と後蓋８側とに密封装置が設けられる。   Conventionally, as a railway vehicle bearing device, as shown in FIG. 2, a double row tapered roller having an outer ring 1, a rolling element (conical roller) 2, an inner ring 3, a spacer 4, and a cage 5. A bearing 6 is mounted on an axle 7, a rear lid 8 is disposed on the inner end side of the axle 6 of the bearing 6, and a front lid 9 and an oil drainer 10 are disposed on the outer end side. A sealing device is provided on the front lid 9 side and the rear lid 8 side of the bearing 6.

図３に前蓋９側の密封装置のみを詳細に示す。上記外輪１の外端側の内周面には、金属環１１の基部１１ａが固定され、この基部１１ａから軸受６の軸方向外方へ連なる第一の円筒部１１ｂが設けられている。この第一の円筒部１１ｂの内周面には、芯金１３の基部１３ａが固定され、この基部１３ａの外端部から半径方向内方へ連なる取付部１３ｂが設けられている。この芯金１３の取付部１３ｂには弾性シール材１４が取付けられ、この弾性シール材１４には、上記前蓋９の外周面に半径方向外方から接触する主リップ部１４ａが設けられている。また、第一の円筒部１１ｂの軸受６の軸方向外方には前記第一の円筒部１１ｂより小径の第二の円筒部１１ｃが連なり、この第二の円筒部１１ｃと前記前蓋９とでラビリンス１６を構成している。このような構造を採用することで、グリースが軸受のような摺動部に長期に渡り保持され車軸の潤滑性を維持している（例えば、特許文献１）。   FIG. 3 shows only the sealing device on the front lid 9 side in detail. A base portion 11 a of a metal ring 11 is fixed to the inner peripheral surface on the outer end side of the outer ring 1, and a first cylindrical portion 11 b that extends from the base portion 11 a to the outside in the axial direction of the bearing 6 is provided. A base portion 13a of the metal core 13 is fixed to the inner peripheral surface of the first cylindrical portion 11b, and a mounting portion 13b is provided that extends radially inward from the outer end portion of the base portion 13a. An elastic seal material 14 is attached to the attachment portion 13b of the core bar 13, and the elastic seal material 14 is provided with a main lip portion 14a that comes into contact with the outer peripheral surface of the front lid 9 from the outside in the radial direction. . A second cylindrical portion 11c having a diameter smaller than that of the first cylindrical portion 11b is connected to the outer side in the axial direction of the bearing 6 of the first cylindrical portion 11b, and the second cylindrical portion 11c and the front lid 9 are connected. This constitutes the labyrinth 16. By adopting such a structure, grease is held for a long time in a sliding portion such as a bearing to maintain the lubricity of the axle (for example, Patent Document 1).

実開平５−５６４８号公報Japanese Utility Model Publication No. 5-5648

しかしながら、特許文献１のような車軸構造にあっては、軸受端面すなわちラビリンスやそれに連通する密封装置が外部に対して略剥き出しの状態であるため、車両洗浄作業時の高圧シャワーなどにより、密封装置を越えて軸受内部に水が浸入する虞が有った。この水侵入により、軸受の錆や剥離発生の要因になる可能性もあった。   However, in the axle structure as disclosed in Patent Document 1, the bearing end surface, that is, the labyrinth and the sealing device communicating therewith are substantially exposed to the outside. There was a risk of water entering the inside of the bearing beyond. This water intrusion may cause rusting and peeling of the bearing.

本発明は、上述の問題に鑑み、軸受内部への水侵入を防止し、軸受の錆や剥離発生を防止した転鉄道車両用軸受の密封装置を提供することを目的とする。   In view of the above-described problems, an object of the present invention is to provide a rolling device bearing sealing device that prevents water from entering the bearing and prevents the bearing from rusting and peeling.

本発明は、外輪、転動体および内輪を有する転がり軸受の前記外輪の端部に固定され、前記軸受の軸方向外方に第一の円筒部、第二の円筒部を有する金属環と、この金属環の第一の円筒部内径に設けられた芯金と、この芯金に取付けられ、車軸に固定した蓋部材の外周面に半径方向外方から接触するリップを備えた弾性シール材とを備え、前記蓋部材の外径（Ｄ１）、前記弾性シール材の内径（Ｄ２）、前記外輪の外径（Ｄ３）との関係がＤ２≦Ｄ１≦Ｄ３の関係を満たすとともに、前記蓋部材には前記第二の円筒部の先端に対向する部位に凹溝が形成されており、前記凹溝に前記第二の円筒部の先端部が若干の隙間を以って嵌入されてラビリンスを形成したことを特徴とする。   The present invention includes a metal ring having a first cylindrical portion and a second cylindrical portion that are fixed to an end portion of the outer ring of a rolling bearing having an outer ring, a rolling element, and an inner ring, and have a first cylindrical portion and a second cylindrical portion on the outer side in the axial direction of the bearing. A metal core provided on the inner diameter of the first cylindrical portion of the metal ring, and an elastic sealing material having a lip attached to the metal core and contacting the outer peripheral surface of the lid member fixed to the axle from the outside in the radial direction. And the relationship between the outer diameter (D1) of the lid member, the inner diameter (D2) of the elastic seal material, and the outer diameter (D3) of the outer ring satisfies the relationship of D2 ≦ D1 ≦ D3. A concave groove is formed in a portion facing the tip of the second cylindrical portion, and a labyrinth is formed by inserting the tip of the second cylindrical portion into the concave groove with a slight gap. It is characterized by.

この鉄道車両用軸受の密封装置により、転がり軸受内部への水侵入を防止し、軸受の錆や剥離発生を防止することが可能となる。   With this railway vehicle bearing sealing device, it is possible to prevent water from entering the inside of the rolling bearing and to prevent the bearing from rusting and peeling.

本発明の実施形態に係る鉄道車両用車軸の断面図である。It is sectional drawing of the axle for rail vehicles which concerns on embodiment of this invention. 本発明の鉄道車両用車軸に係る密封装置周辺拡大図である。It is a sealing device periphery enlarged view concerning the axle for rail vehicles of the present invention. 従来の鉄道車両用車軸の断面図である。It is sectional drawing of the axle for conventional railway vehicles. 従来の鉄道車両用車軸に係る密封装置周辺拡大図である。It is a sealing device periphery enlarged view which concerns on the axle for conventional railway vehicles.

以下、本発明の実施形態につき、図面を参照しつつ詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１に示すように、鉄道車両用の複列円錐ころ軸受２０は、外輪２１と、２列の転動体（円錐ころ）２２と、内輪２３と、間座２４と、保持器２５とを有している。この内輪２３，２３に車軸２６が装着されている。上記ころ軸受２０の車軸２６についての内端側に後蓋２７が配置され、外端側に前蓋２８が配置されている。上記外輪２１と後蓋２７との間及び外輪２１と前蓋２８との間には、鉄道車両用軸受の密封装置２９がそれぞれ設けられている。   As shown in FIG. 1, the double-row tapered roller bearing 20 for a railway vehicle has an outer ring 21, two rows of rolling elements (conical rollers) 22, an inner ring 23, a spacer 24, and a cage 25. doing. An axle 26 is attached to the inner rings 23, 23. A rear lid 27 is disposed on the inner end side of the axle 26 of the roller bearing 20, and a front lid 28 is disposed on the outer end side. Between the outer ring 21 and the rear lid 27 and between the outer ring 21 and the front lid 28, there are provided railway vehicle bearing sealing devices 29, respectively.

図２に前蓋２８側の密封装置２９を詳細に示す。金属環３０は、上記外輪２１の外端部２１ａの内周面に固定される基部３０ａと、この基部３０ａから軸方向外方へ連なる第一の円筒部３０ｂと、この第一の円筒部３０ｂから半径方向内方へ折曲されて軸方向外方へ連なる第二の円筒部３０ｃとで形成される。   FIG. 2 shows the sealing device 29 on the front lid 28 side in detail. The metal ring 30 includes a base portion 30a that is fixed to the inner peripheral surface of the outer end portion 21a of the outer ring 21, a first cylindrical portion 30b that extends axially outward from the base portion 30a, and the first cylindrical portion 30b. And a second cylindrical portion 30c which is bent inward in the radial direction and continues outward in the axial direction.

また、前蓋２８には前記第二の円筒部３０ｃの先端に対向する部位に凹溝２８ｂが形成されており、この凹溝２８ｂに前記第二の円筒部３０ｃの先端部が若干の隙間を以って嵌入されてラビリンスが設けられている。   Further, the front lid 28 is formed with a concave groove 28b at a portion facing the tip of the second cylindrical portion 30c, and the tip of the second cylindrical portion 30c has a slight gap in the concave groove 28b. Thus, a labyrinth is provided.

そして、前記蓋部の外径（Ｄ１）、前記弾性シール材の内径（Ｄ２）、前記外輪の外径（Ｄ３）との関係がＤ２≦Ｄ１≦Ｄ３の関係を満たすように構成されている。   The outer diameter (D1) of the lid, the inner diameter (D2) of the elastic sealing material, and the outer diameter (D3) of the outer ring satisfy the relationship of D2 ≦ D1 ≦ D3.

また、芯金３１は、上記金属環３０の円筒部３０ｂの内周面に固定される基部３１ａと、この基部３１ａの外端部から上記円筒部３０ｂと折曲部３０ｃとの間の内壁に沿って半径方向内方へ連なる取付部３１ｂとで形成される。   The metal core 31 is fixed to the inner peripheral surface of the cylindrical portion 30b of the metal ring 30, and the inner wall between the cylindrical portion 30b and the bent portion 30c from the outer end portion of the base portion 31a. And a mounting portion 31b extending inward in the radial direction.

さらに、弾性シール材３２は、上記芯金３１の取付部３１ｂに取付けられる基部３２ａと、この基部３２ａからほぼ真下に立ち下がって上記前蓋２８の外周面に軽く接触する複数の補助リップ部３２ｄ，３２ｄと、上記基部３２ａから軸方向内方へ連なり、前蓋２８の外周面に半径方向外方から弾力で接触する第１リップ部（主リップ部）３２ｂと、この第１リップ部３２ｂからさらに軸方向内方へ連なり、前蓋２８の外周面と所定の隙間ｔを隔てる第２リップ部３２ｃとで形成される。   Further, the elastic sealing material 32 includes a base portion 32a attached to the attachment portion 31b of the core metal 31, and a plurality of auxiliary lip portions 32d that fall almost directly below the base portion 32a and lightly contact the outer peripheral surface of the front lid 28. , 32d, the first lip portion (main lip portion) 32b, which extends inward in the axial direction from the base portion 32a and contacts the outer peripheral surface of the front lid 28 from the radially outer side, and the first lip portion 32b. Further, the second lip portion 32c is formed in the axially inward direction and is separated from the outer peripheral surface of the front lid 28 by a predetermined gap t.

この第２リップ部３２ｃは、弾性シール材３２の使用初期には上記隙間ｔを有しているが、使用中に第１リップ部３２ｂが摩耗した場合、第２リップ部３２ｃが前蓋２８の外周面に軽く接触もしくはごく僅かの隙間を隔てて対向するように設定する。なお、３３は弾性シール材３２の第１リップ部３２ｂを前蓋２８の外周面に押し付けるスプリングである。上記後蓋２７側の密封装置２９も基本的には前蓋２８側の密封装置と同構造であるから、詳細な説明は省略する。   The second lip portion 32c has the gap t at the beginning of use of the elastic sealing material 32. However, when the first lip portion 32b is worn during use, the second lip portion 32c is attached to the front lid 28. It is set so that it touches the outer surface lightly or opposes with a slight gap. Reference numeral 33 denotes a spring that presses the first lip portion 32 b of the elastic sealing material 32 against the outer peripheral surface of the front lid 28. Since the sealing device 29 on the rear lid 27 side has basically the same structure as the sealing device on the front lid 28 side, detailed description thereof is omitted.

本発明の構成により、転がり軸受内部への水侵入を防止し、軸受の錆や剥離発生を防止することが可能となる。   According to the configuration of the present invention, it is possible to prevent water from entering the inside of the rolling bearing and to prevent the bearing from being rusted or peeled off.

２０ ころ軸受
２１ 外輪
２２ 転動体
２３ 内輪
２４ 間座
２５ 保持器
２６ 車軸
２７ 後蓋
２８ 前蓋
２９ 密封装置 20 Roller Bearing 21 Outer Ring 22 Rolling Element 23 Inner Ring 24 Spacer 25 Cage 26 Axle 27 Rear Cover 28 Front Cover 29 Sealing Device

Claims (1)

外輪、転動体および内輪を有する転がり軸受の前記外輪の端部に固定され、前記軸受の軸方向外方に第一の円筒部、第二の円筒部を有する金属環と、この金属環の第一の円筒部内径に設けられた芯金と、この芯金に取付けられ、車軸に固定した蓋部材の外周面に半径方向外方から接触するリップを備えた弾性シール材とを備え、前記蓋部材の外径（Ｄ１）、前記弾性シール材の内径（Ｄ２）、前記外輪の外径（Ｄ３）との関係がＤ２≦Ｄ１≦Ｄ３の関係を満たすとともに、前記蓋部材には前記第二の円筒部の先端に対向する部位に凹溝が形成されており、前記凹溝に前記第二の円筒部の先端部が若干の隙間を以って嵌入されてラビリンスを形成したことを特徴とする鉄道車両用軸受の密封装置。   A metal ring having a first cylindrical part and a second cylindrical part fixed to an end of the outer ring of a rolling bearing having an outer ring, a rolling element and an inner ring, and having a first cylindrical part and a second cylindrical part on the outer side in the axial direction of the bearing, A metal core provided on an inner diameter of one cylindrical portion, and an elastic seal member provided on the metal core and provided with a lip that comes into contact with the outer peripheral surface of the cover member fixed to the axle from the outside in the radial direction. The relationship between the outer diameter (D1) of the member, the inner diameter (D2) of the elastic sealing material, and the outer diameter (D3) of the outer ring satisfies the relationship of D2 ≦ D1 ≦ D3. A concave groove is formed in a portion facing the tip of the cylindrical portion, and a labyrinth is formed by inserting the tip of the second cylindrical portion into the concave groove with a slight gap. Railway vehicle bearing sealing device.
JP2014135889A 2014-07-01 2014-07-01 Sealing device of bearing for railway vehicle Pending JP2016014418A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112610597A (en) * 2020-12-14 2021-04-06 人本股份有限公司 Sealing structure of cylindrical roller

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004316853A (en) * 2003-04-18 2004-11-11 Nsk Ltd Bearing device for railroad vehicle

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004316853A (en) * 2003-04-18 2004-11-11 Nsk Ltd Bearing device for railroad vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112610597A (en) * 2020-12-14 2021-04-06 人本股份有限公司 Sealing structure of cylindrical roller

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