JP2005163828A - Bearing device - Google Patents

Bearing device Download PDF

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JP2005163828A
JP2005163828A JP2003400153A JP2003400153A JP2005163828A JP 2005163828 A JP2005163828 A JP 2005163828A JP 2003400153 A JP2003400153 A JP 2003400153A JP 2003400153 A JP2003400153 A JP 2003400153A JP 2005163828 A JP2005163828 A JP 2005163828A
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Prior art keywords
inner ring
slinger
bearing
seal
bearing device
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Japanese (ja)
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Kazuo Katsumata
一夫 勝又
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NSK Ltd
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NSK Ltd
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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
    • 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
    • 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
    • F16C2326/00—Articles relating to transporting
    • F16C2326/10—Railway vehicles

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

Abstract

<P>PROBLEM TO BE SOLVED: To secure favorable seal performance, and reduce bearing cost. <P>SOLUTION: This bearing device 10 for a railway vehicle is provided with a rolling bearing 11 comprising a plurality of rolling elements 17 disposed between an outer ring 15 and an inner ring 12 to be capable of rolling in the circumferential direction, rotary members 13 and 14 disposed at axial end parts of the inner ring 12 to rotate with the inner ring 12, and seal means disposed between the outer ring 15 and the rotary members 13 and 14 to seal the inside of the rolling bearing 11. The seal means are provided with seal members 20 supported on the outer ring 15 to be contactless to the rotary members 13 and 14, and labyrinth structure forming members 30 and 40 to form labyrinth structure with the contactless seal members 20. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば鉄道車両の車軸等の回転支持部に用いられる軸受装置に関し、特に軸受内部への異物侵入や軸受内部からの潤滑剤の漏れ等を防止するシール手段を備えた軸受装置に関する。   The present invention relates to a bearing device used in a rotation support portion of, for example, an axle of a railway vehicle, and more particularly to a bearing device provided with a sealing means for preventing foreign matter from entering the bearing and leakage of a lubricant from the bearing.

従来のこの種の軸受装置としては、例えば図３に示す鉄道車両用軸受装置が知られている（例えば特許文献１参照）。
この軸受装置は、車軸１１を回転自在に支持する転がり軸受の一例としての複列の円錐ころ軸受１と、該円錐ころ軸受１の内輪２の軸方向両端部にそれぞれ配置されて該内輪２と共に車軸１１と一体回転する筒状の後蓋（回転部材）３及び油切り（回転部材）４とを備える。 As a conventional bearing device of this type, for example, a railcar bearing device shown in FIG. 3 is known (see, for example, Patent Document 1).
This bearing device is disposed at both ends in the axial direction of a double row tapered roller bearing 1 as an example of a rolling bearing that rotatably supports an axle 11 and an inner ring 2 of the tapered roller bearing 1, together with the inner ring 2. A cylindrical rear lid (rotating member) 3 and an oil drain (rotating member) 4 that rotate integrally with the axle 11 are provided.

円錐ころ軸受１は、一体型の外輪５と軸方向に分割された一対の内輪２との間に転動体としての二列のころ７がそれぞれ保持器８を介して周方向に複数配設されている。なお、図において符号６は一対の内輪２間に介装された内輪間座である。
また、内輪２と後蓋３との間及び内輪２と油切り４との間を覆うようにして、筒状のシールケース９が外輪５の両端部にそれぞれ嵌合固定され、各シールケース９の内周部にはシール部材１０が取り付けられている。シール部材１０は、図４の部分拡大図に示すように、後蓋３及び油切り４の外周面に摺接する接触式とされており、これにより、軸受内部への異物侵入や軸受内部からのグリース等の漏れ等を防止するようにしている。
特開２０００−５２９８６号公報 In the tapered roller bearing 1, a plurality of two rows of rollers 7 as rolling elements are arranged in the circumferential direction via a cage 8 between an integrated outer ring 5 and a pair of axially divided inner rings 2. ing. In the figure, reference numeral 6 denotes an inner ring spacer interposed between the pair of inner rings 2.
A cylindrical seal case 9 is fitted and fixed to both ends of the outer ring 5 so as to cover between the inner ring 2 and the rear lid 3 and between the inner ring 2 and the oil drain 4. A seal member 10 is attached to the inner periphery of the. As shown in the partially enlarged view of FIG. 4, the seal member 10 is a contact type that is in sliding contact with the outer peripheral surfaces of the rear lid 3 and the oil drainer 4, thereby allowing foreign matter to enter the bearing and prevent the foreign matter from entering the bearing. The leak of grease is prevented.
JP 2000-52986 A

しかしながら、上記従来の軸受装置においては、シール手段として、後蓋３及び油切り４の外周面に摺接する接触式のシール部材１０を採用していることから、後蓋３及び油切り４のシール部材１０の摺接面に硬質クロムめっき等の表面処理を施す必要が生じ、軸受コストを低くする妨げになっている。
本発明はこのような不都合を解消するためになされたものであり、良好なシール性能を確保することができるのは勿論のこと、軸受コストの低減を図ることができる軸受装置を提供することを目的とする。 However, since the conventional bearing device employs the contact-type seal member 10 that is in sliding contact with the outer peripheral surfaces of the rear lid 3 and the oil drain 4 as the sealing means, the seal of the rear lid 3 and the oil drain 4 is employed. It is necessary to subject the sliding surface of the member 10 to surface treatment such as hard chrome plating, which hinders reduction in bearing costs.
The present invention has been made to eliminate such inconveniences, and provides a bearing device capable of reducing bearing costs as well as ensuring good sealing performance. Objective.

上記目的を達成するために、請求項１に係る発明は、外輪と内輪との間に複数の転動体が周方向に転動自在に配設された転がり軸受と、前記内輪の軸方向端部に配置されて該内輪と共に回転する回転部材と、前記外輪と前記回転部材との間に配置されて前記転がり軸受の内部をシールするシール手段とを備えた軸受装置において、
前記シール手段は、前記外輪側に支持されて前記回転部材に対して非接触とされたシール部材と、該非接触シール部材との間にラビリンス構造を形成するためのラビリンス構造形成部材とを備えたことを特徴とする。 In order to achieve the above object, the invention according to claim 1 is a rolling bearing in which a plurality of rolling elements are rotatably disposed in the circumferential direction between an outer ring and an inner ring, and an axial end portion of the inner ring. A rotating member that rotates with the inner ring and a sealing device that is arranged between the outer ring and the rotating member and seals the inside of the rolling bearing.
The seal means includes a seal member supported on the outer ring side and brought into non-contact with the rotating member, and a labyrinth structure forming member for forming a labyrinth structure between the non-contact seal member. It is characterized by that.

請求項２に係る発明は、請求項１において、前記ラビリンス構造形成部材は、前記回転部材に設けられた第１のスリンガと、該回転部材と前記内輪の端面との間に介装された第２のスリンガとを備えたことを特徴とする。
請求項３に係る発明は、請求項２において、前記第２のスリンガが、銅又は前記内輪端面との摩擦により銅粉を発生させる銅含有材料で形成されていることを特徴とする。
請求項４に係る発明は、請求項２において、前記第２のスリンガが合成樹脂製であることを特徴とする。
請求項５に係る発明は、請求項１〜４のいずれか一項において、鉄道車両の回転支持部に用いることを特徴とする。 According to a second aspect of the present invention, in the first aspect, the labyrinth structure forming member includes a first slinger provided on the rotating member, and a first slinger provided between the rotating member and an end surface of the inner ring. 2 slinger.
The invention according to claim 3 is characterized in that, in claim 2, the second slinger is made of copper or a copper-containing material that generates copper powder by friction with the inner ring end face.
The invention according to claim 4 is characterized in that, in claim 2, the second slinger is made of a synthetic resin.
The invention according to claim 5 is characterized in that, in any one of claims 1 to 4, the invention is used for a rotation support portion of a railway vehicle.

本発明によれば、シール手段として、外輪側に支持されて回転部材に対して非接触とされたシール部材を採用し、該非接触シール部材との間に、例えば、回転部材に設けられた第１のスリンガと、該回転部材と内輪端面との間に介装された第２のスリンガとを用いてラビリンス構造を形成することで、良好なシール性能を確保することができると共に、従来のように、回転部材のシール部材の摺接面への硬質クロムめっき等の表面処理を不要にして軸受コストの低減を図ることができる。   According to the present invention, a sealing member that is supported on the outer ring side and is not in contact with the rotating member is employed as the sealing means, and, for example, a first member provided on the rotating member is provided between the non-contact sealing member. By forming a labyrinth structure using one slinger and the second slinger interposed between the rotating member and the inner ring end face, it is possible to ensure good sealing performance and In addition, it is possible to reduce the bearing cost by eliminating the need for a surface treatment such as hard chrome plating on the sliding surface of the seal member of the rotating member.

また、前記第２のスリンガを自己潤滑性を有する銅又は前記内輪端面との摩擦により銅粉を発生させる銅含有材料で形成することにより、特に鉄道車両用の車軸のように回転軸に大きな曲げモーメントが負荷される場合に、内輪端面と第２のスリンガとの合わせ面に微小すべりに起因するフレッチング摩耗が生じて摩耗粉が発生しても、この摩耗粉は銅粉となるため、この銅粉が軸受内部に混入してもグリース等の寿命に悪影響を及ぼさないばかりか、その自己潤滑性によりグリース等の寿命の延長を図ることができる。
更に、前記第２のスリンガを合成樹脂製とすることで、特に鉄道車両用の車軸のように回転軸に大きな曲げモーメントが負荷される場合に、内輪端面と第２のスリンガとの合わせ面での微小すべりによるフレッチング摩耗の発生を抑制することができる。 Further, the second slinger is formed of copper having a self-lubricating property or a copper-containing material that generates copper powder by friction with the inner ring end face, so that a large bend is applied to the rotating shaft, particularly an axle for a railway vehicle. When a moment is applied, even if fretting wear due to micro-slip occurs on the mating surface between the inner ring end face and the second slinger and wear powder is generated, this wear powder becomes copper powder. Even if powder is mixed into the bearing, it will not adversely affect the service life of the grease, etc., and its self-lubricating property can extend the service life of the grease.
Furthermore, by making the second slinger made of synthetic resin, particularly when a large bending moment is applied to the rotating shaft such as an axle for a railway vehicle, the mating surface of the inner ring end surface and the second slinger is used. It is possible to suppress the occurrence of fretting wear due to the microslip of.

以下、本発明の実施の形態の一例を図を参照して説明する。図１は本発明の実施の形態の一例である鉄道車両用軸受装置を説明するための要部断面図、図２は図１の部分拡大図である。
本発明の実施の形態の一例である鉄道車両用軸受装置１０は、車軸２１を回転自在に支持する転がり軸受の一例としての複列の円錐ころ軸受１１と、該円錐ころ軸受１１の内輪１２の軸方向両端部にそれぞれ配置されて該内輪１２と共に車軸２１と一体回転する筒状の後蓋（回転部材）１３及び油切り（回転部材）１４とを備える。 Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view of a main part for explaining a railway vehicle bearing device as an example of an embodiment of the present invention, and FIG. 2 is a partially enlarged view of FIG.
A railway vehicle bearing device 10 as an example of an embodiment of the present invention includes a double-row tapered roller bearing 11 as an example of a rolling bearing that rotatably supports an axle 21, and an inner ring 12 of the tapered roller bearing 11. A cylindrical rear lid (rotating member) 13 and an oil drainer (rotating member) 14 that are disposed at both axial ends and rotate integrally with the axle 21 together with the inner ring 12 are provided.

複列円錐ころ軸受１１は、一体型の外輪１５と軸方向に分割された一対の内輪１２との間に転動体としての二列の円錐ころ１７がそれぞれ保持器１８を介して周方向に複数配設され、軸受内部には潤滑剤としてグリースが封入されている。
また、内輪１２と後蓋１３との間及び内輪１２と油切り１４との間には、筒状のシールケース１９が配置されている。シールケース１９は軸方向に順番に形成された大径筒部１９ａと小径筒部１９ｂとを有しており、大径筒部１９ａが外輪１５の端部内径面に嵌合固定され、小径筒部１９ｂは外輪１５の端部から軸方向外方に突出して後蓋１３（油切り１４）の外周面を覆っている。 The double row tapered roller bearing 11 includes a plurality of two rows of tapered rollers 17 as rolling elements in a circumferential direction via a cage 18 between an integral outer ring 15 and a pair of axially divided inner rings 12. The grease is sealed inside the bearing as a lubricant.
A cylindrical seal case 19 is disposed between the inner ring 12 and the rear lid 13 and between the inner ring 12 and the oil drain 14. The seal case 19 has a large-diameter cylindrical portion 19a and a small-diameter cylindrical portion 19b that are sequentially formed in the axial direction. The large-diameter cylindrical portion 19a is fitted and fixed to the inner diameter surface of the end portion of the outer ring 15, so The part 19b protrudes axially outward from the end of the outer ring 15 and covers the outer peripheral surface of the rear lid 13 (oil drainer 14).

ここで、この実施の形態では、シールケース１９の小径筒部１９ｂの内周面に後蓋１３及び油切り１４に対して非接触とされたシール部材２０を取り付けており、後蓋１３側については、非接触シール部材２０との間にラビリンス構造を形成すべく、後蓋１３に第１のスリンガ３０を設けると共に、該後蓋１３と内輪１２の端面との間に第２のスリンガ４０を介装し、油切り１４側については、非接触シール部材２０との間にラビリンス構造を形成すべく、油切り１４に第１のスリンガ３０を設けると共に、該油切り１４と内輪１２の端面との間に第２のスリンガ４０を介装している。   Here, in this embodiment, the seal member 20 that is not in contact with the rear lid 13 and the oil drain 14 is attached to the inner peripheral surface of the small-diameter cylindrical portion 19b of the seal case 19, and the rear lid 13 side is provided. In order to form a labyrinth structure with the non-contact seal member 20, a first slinger 30 is provided on the rear lid 13, and a second slinger 40 is provided between the rear lid 13 and the end face of the inner ring 12. In order to form a labyrinth structure with the non-contact seal member 20 on the side of the oil drain 14, a first slinger 30 is provided on the oil drain 14, and the end face of the oil drain 14 and the inner ring 12 A second slinger 40 is interposed therebetween.

なお、後蓋１３側及び油切り１４側のラビリンス構造は同一であるため、図２を参照して、後蓋１３側のラビリンス構造について詳述すると、第１のスリンガ３０は、後蓋１３の外周面に嵌合された内筒部３１と、該内筒部３１の前記内輪１２から離間する側の端部から径方向外方に延びるフランジ部３２と、該フランジ部３２の先端から前記内輪１２側に向かって延びる外筒部３３とを備えている。   Since the labyrinth structure on the rear lid 13 side and the oil drainer 14 side is the same, the labyrinth structure on the rear lid 13 side will be described in detail with reference to FIG. An inner cylinder portion 31 fitted to the outer peripheral surface, a flange portion 32 extending radially outward from an end portion of the inner cylinder portion 31 on the side away from the inner ring 12, and the inner ring from the tip of the flange portion 32 The outer cylinder part 33 extended toward 12 side is provided.

そして、第１のスリンガ３０の内筒部３１の外周面に非接触シール部材２０が僅かなすき間をもって非接触で対向配置されると共に、外筒部３３の先端が非接触シール部材２０の内輪１２から離間する側に設けられた凹部２０ａに挿入されることで、非接触シール部材２０と第１のスリンガ３０との間にラビリンス構造が形成されている。また、非接触シール部材２０の内径面と第１のスリンガ３０の外径面が僅かなすき間２０ｃをもって対向配置され、このすき間２０ｃもラビリンス効果による非接触シール機能を有することにより、凹部２０ａとともにシール効果を発揮する。   The non-contact seal member 20 is disposed in a non-contact manner on the outer peripheral surface of the inner cylinder portion 31 of the first slinger 30 with a slight gap, and the tip of the outer cylinder portion 33 is the inner ring 12 of the non-contact seal member 20. The labyrinth structure is formed between the non-contact sealing member 20 and the first slinger 30 by being inserted into the recess 20a provided on the side away from the contact. In addition, the inner diameter surface of the non-contact seal member 20 and the outer diameter surface of the first slinger 30 are arranged to face each other with a slight gap 20c, and the gap 20c also has a non-contact sealing function due to the labyrinth effect, thereby sealing together with the recess 20a. Demonstrate the effect.

一方、第２のスリンガ４０は、後蓋１３と内輪１２の端面との間に介装された円環板４１と、該円環板４１の内径部から内輪１２から離間する側に軸方向に延びて後蓋１３の内周面に嵌合される内筒部４２と、円環板４１の外径部から内輪１２から離間する側に軸方向に延びる外筒部４３とを備えている。このように、第２のスリンガ４０の円筒部４２を後蓋１３の内周面に嵌合させることにより、第２のスリンガ４０を内輪１２と後蓋１３との間に作業性を良くして介在させることができ、後述のラビリンス構造を形成するすき間を適切に設定できる。   On the other hand, the second slinger 40 includes an annular plate 41 interposed between the rear lid 13 and the end face of the inner ring 12, and an axial direction from the inner diameter portion of the annular plate 41 to the side away from the inner ring 12. An inner cylinder portion 42 that extends and is fitted to the inner peripheral surface of the rear lid 13 and an outer cylinder portion 43 that extends in the axial direction from the outer diameter portion of the annular plate 41 to the side away from the inner ring 12 are provided. Thus, the workability of the second slinger 40 is improved between the inner ring 12 and the rear lid 13 by fitting the cylindrical portion 42 of the second slinger 40 to the inner peripheral surface of the rear lid 13. It can be interposed, and a gap for forming a labyrinth structure described later can be appropriately set.

そして、第２のスリンガ４０の外筒部４３の先端が非接触シール部材２０の内輪１２を向く側に設けられた凹部２０ｂに挿入されることで、非接触シール部材２０と第２のスリンガ４０との間にラビリンス構造が形成され、上述した非接触シール部材２０と第１のスリンガ３０との間に形成されるラビリンス構造と共に、軸受内部への異物侵入や軸受内部からのグリースの漏れ等を防止するシール手段を形成している。なお、第２のスリンガ４０の外筒部４３の外周面とシールケース１９の小径筒部１９ｂの内周面とのすき間をラビリンス構造を形成するように設定してシール効果を持たせることも可能である。   And the front-end | tip of the outer cylinder part 43 of the 2nd slinger 40 is inserted in the recessed part 20b provided in the side which faces the inner ring | wheel 12 of the non-contact seal member 20, and the non-contact seal member 20 and the 2nd slinger 40 And the labyrinth structure formed between the non-contact seal member 20 and the first slinger 30 described above, as well as foreign matter intrusion into the bearing and leakage of grease from the bearing. Sealing means to prevent is formed. The clearance between the outer peripheral surface of the outer cylindrical portion 43 of the second slinger 40 and the inner peripheral surface of the small-diameter cylindrical portion 19b of the seal case 19 can be set so as to form a labyrinth structure to have a sealing effect. It is.

また、この実施の形態では、第２のスリンガ４０を、グリース寿命を延長させる材料として知られている自己潤滑性を有する銅又は内輪１２端面との摩擦により銅粉を発生させる銅含有材料で形成している。銅含有材料としては、有機銅系化合物（カルバミン酸銅、ステアリン酸銅、ナフチン酸銅など）や、銅添加樹脂、銅線入り樹脂等を挙げることができる。なお、ここで用いる樹脂は、軸受内に侵入しても問題を生じないテフロン（登録商標）樹脂やフッ素樹脂等とする。   In this embodiment, the second slinger 40 is formed of copper having a self-lubricating property known as a material for extending the grease life or a copper-containing material that generates copper powder by friction with the end face of the inner ring 12. doing. Examples of the copper-containing material include organic copper-based compounds (such as copper carbamate, copper stearate, and copper naphthinate), copper-added resins, and copper wire-containing resins. The resin used here is Teflon (registered trademark) resin, fluorine resin, or the like that does not cause a problem even if it enters the bearing.

このようにこの実施の形態では、外輪１５と後蓋１３及び油切り１４との間に配置されて軸受内部をシールするシール手段として、外輪１５側に支持されて後蓋１３及び油切り１４に対して非接触とされたシール部材２０を採用し、該非接触シール部材２０との間に、後蓋１３及び油切り１４に設けられた第１のスリンガ３０と、後蓋１３及び油切り１４と内輪１２の端面との間に介装された第２のスリンガ４０とを用いてラビリンス構造を形成しているので、良好なシール性能を確保することができると共に、非接触のシール部材２０であることから、従来のように、後蓋３及び油切り４のシール部材１０の摺接面に硬質クロムめっき等の表面処理を施す必要がなくなるため、軸受コストの低減を図ることができる。   As described above, in this embodiment, as a sealing means that is disposed between the outer ring 15 and the rear lid 13 and the oil drain 14 and seals the inside of the bearing, it is supported on the outer ring 15 side to the rear lid 13 and the oil drain 14. A first non-contact seal member 20 is employed, and a first slinger 30 provided between the non-contact seal member 20 and the rear lid 13 and the oil drain 14, the rear lid 13 and the oil drain 14, Since the labyrinth structure is formed by using the second slinger 40 interposed between the end surface of the inner ring 12, it is possible to ensure good sealing performance and to provide a non-contact sealing member 20. Therefore, it is not necessary to apply a surface treatment such as hard chrome plating to the sliding contact surfaces of the sealing member 10 of the rear lid 3 and the oil drainer 4 as in the prior art, so that the bearing cost can be reduced.

なお、シール機能は、第１のスリンガ３０と第２のスリンガ４０とによる２箇所以上のラビリンス構造でシールすることにより、一箇所のラビリンス構造の場合に比べてシール機能を向上させることができ、３箇所以上のラビリンス構造を形成することにより、シール機能をより優れたものとすることができる。
シールケース１９は鋼等の金属、シール部材２０はアクリルゴムやニトリルゴム等を主成分とするゴム等を用い、シールケース１９とシール部材２０とを一体成形して製造することにより、凹部２０ａ，２０ｂ等の複雑な構造を容易に加工でき、すき間２０ｃをも含め、ラビリンスシールのすき間を精度良く設定できる。 In addition, a sealing function can improve a sealing function compared with the case of a labyrinth structure of one place by sealing with two or more labyrinth structures by the 1st slinger 30 and the 2nd slinger 40, By forming the labyrinth structure at three or more locations, the sealing function can be further improved.
The seal case 19 is made of a metal such as steel, the seal member 20 is made of rubber or the like mainly composed of acrylic rubber, nitrile rubber, or the like. A complicated structure such as 20b can be easily processed, and the gap of the labyrinth seal including the gap 20c can be set with high accuracy.

また、第２のスリンガ４０を銅又は前記内輪端面との摩擦により銅粉を発生させる銅含有材料で形成しているので、車軸２１に大きな曲げモーメントが負荷された状態で回転する場合に、内輪１２端面と第２のスリンガ４０との合わせ面に微小すべりに起因するフレッチング摩耗が生じて摩耗粉が発生しても、この摩耗粉は銅粉となるため、この銅粉が軸受内部に混入してもグリースの寿命に悪影響を及ぼさないばかりか、その自己潤滑性によりグリース等の寿命の延長を図ることができる。   In addition, since the second slinger 40 is made of copper or a copper-containing material that generates copper powder by friction with the inner ring end face, the inner ring is rotated when the axle 21 is rotated with a large bending moment applied. Even if fretting wear due to micro-slip occurs on the mating surface between the 12 end face and the second slinger 40 and wear powder is generated, this wear powder becomes copper powder, so this copper powder is mixed inside the bearing. However, the life of the grease is not adversely affected, and the self-lubricating property can extend the life of the grease.

なお、本発明は上記実施の形態に限定されるものではなく、本発明の要旨を逸脱しない範囲において適宜変更可能である。
例えば、上記実施の形態では、転がり軸受として、複列円錐ころ軸受を例に採ったが、これに代えて、複列の円筒ころ軸受やその他の転がり軸受を採用してもよい。
また、上記実施の形態では、第２のスリンガ４０を銅又は前記内輪端面との摩擦により銅粉を発生させる銅含有材料で形成した場合を例に採ったが、これに限定されず、第２のスリンガ４０を合成樹脂やその他の材料で形成してもよい。第２のスリンガ４０を合成樹脂製とした場合には、車軸２１に大きな曲げモーメントが負荷された状態で回転する場合に、内輪１２端面と第２のスリンガ４０との合わせ面での微小すべりによるフレッチング摩耗の発生を抑制することができる。 In addition, this invention is not limited to the said embodiment, In the range which does not deviate from the summary of this invention, it can change suitably.
For example, in the above embodiment, the double row tapered roller bearing is taken as an example of the rolling bearing, but a double row cylindrical roller bearing or other rolling bearings may be employed instead.
Moreover, in the said embodiment, although the case where the 2nd slinger 40 was formed with the copper containing material which generates copper powder by friction with the copper or the said inner ring | wheel end surface was taken as an example, it is not limited to this, 2nd The slinger 40 may be formed of a synthetic resin or other materials. When the second slinger 40 is made of a synthetic resin, when the axle 21 rotates with a large bending moment applied, the second slinger 40 is caused by a slight slip at the mating surface between the end surface of the inner ring 12 and the second slinger 40. The occurrence of fretting wear can be suppressed.

本発明の実施の形態の一例である鉄道車両用軸受装置を説明するための要部断面図である。It is principal part sectional drawing for demonstrating the bearing apparatus for railway vehicles which is an example of embodiment of this invention. 図１の部分拡大図である。It is the elements on larger scale of FIG. 従来の鉄道車両用軸受装置を説明するための断面図である。It is sectional drawing for demonstrating the conventional railway vehicle bearing apparatus. 図３の部分拡大図である。FIG. 4 is a partially enlarged view of FIG. 3.

符号の説明Explanation of symbols

１０ 鉄道車両用軸受装置
１１ 複列円錐ころ軸受（転がり軸受）
１２ 内輪
１３ 後蓋（回転部材）
１４ 油切り（回転部材）
１５ 外輪
１７ 円錐ころ（転動体）
２０ 非接触シール部材
３０ 第１のスリンガ（ラビリンス構造形成部材）
４０ 第２のスリンガ（ラビリンス構造形成部材） 10 Bearing Device for Railway Vehicles 11 Double Row Conical Roller Bearing (Rolling Bearing)
12 Inner ring 13 Rear lid (rotating member)
14 Oil drain (Rotating member)
15 Outer ring 17 Tapered roller (rolling element)
20 Non-contact sealing member 30 First slinger (labyrinth structure forming member)
40 Second slinger (labyrinth structure forming member)

Claims (5)

外輪と内輪との間に複数の転動体が周方向に転動自在に配設された転がり軸受と、前記内輪の軸方向端部に配置されて該内輪と共に回転する回転部材と、前記外輪と前記回転部材との間に配置されて前記転がり軸受の内部をシールするシール手段とを備えた軸受装置において、
前記シール手段は、前記外輪側に支持されて前記回転部材に対して非接触とされたシール部材と、該非接触シール部材との間にラビリンス構造を形成するためのラビリンス構造形成部材とを備えたことを特徴とする軸受装置。 A rolling bearing in which a plurality of rolling elements are rotatably disposed in a circumferential direction between an outer ring and an inner ring; a rotating member that is disposed at an axial end of the inner ring and rotates with the inner ring; and the outer ring; A bearing device including sealing means disposed between the rotating member and sealing the inside of the rolling bearing;
The seal means includes a seal member supported on the outer ring side and brought into non-contact with the rotating member, and a labyrinth structure forming member for forming a labyrinth structure between the non-contact seal member. A bearing device characterized by that. 前記ラビリンス構造形成部材は、前記回転部材に設けられた第１のスリンガと、該回転部材と前記内輪の端面との間に介装された第２のスリンガとを備えたことを特徴とする請求項１に記載した軸受装置。   The labyrinth structure forming member includes a first slinger provided on the rotating member, and a second slinger interposed between the rotating member and an end surface of the inner ring. Item 2. The bearing device according to Item 1. 前記第２のスリンガが、銅又は前記内輪端面との摩擦により銅粉を発生させる銅含有材料で形成されていることを特徴とする請求項２に記載した軸受装置。   The bearing device according to claim 2, wherein the second slinger is formed of copper or a copper-containing material that generates copper powder by friction with the inner ring end face. 前記第２のスリンガが合成樹脂製であることを特徴とする請求項２に記載した軸受装置。   The bearing device according to claim 2, wherein the second slinger is made of a synthetic resin. 鉄道車両の回転支持部に用いることを特徴とする請求項１〜４のいずれか一項に記載した軸受装置。   It is used for the rotation support part of a railway vehicle, The bearing apparatus as described in any one of Claims 1-4 characterized by the above-mentioned.
JP2003400153A 2003-11-28 2003-11-28 Bearing device Withdrawn JP2005163828A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2246581A1 (en) * 2009-04-27 2010-11-03 Amsted Rail Company, Inc. Roller bearing
CN106481669A (en) * 2016-12-13 2017-03-08 福建省永安轴承有限责任公司 Railway freight-car hub spindle holds sealing ring and the bearing equipped with the sealing ring
FR3046640A1 (en) * 2016-01-08 2017-07-14 Ntn-Snr Roulements UNIT OF BEARING
CN114364894A (en) * 2019-08-16 2022-04-15 阿母斯替德铁路公司 Labyrinth seal with interlocking rotor and seal case insert

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2246581A1 (en) * 2009-04-27 2010-11-03 Amsted Rail Company, Inc. Roller bearing
FR3046640A1 (en) * 2016-01-08 2017-07-14 Ntn-Snr Roulements UNIT OF BEARING
CN106481669A (en) * 2016-12-13 2017-03-08 福建省永安轴承有限责任公司 Railway freight-car hub spindle holds sealing ring and the bearing equipped with the sealing ring
CN114364894A (en) * 2019-08-16 2022-04-15 阿母斯替德铁路公司 Labyrinth seal with interlocking rotor and seal case insert
CN114364894B (en) * 2019-08-16 2024-04-02 阿母斯替德铁路公司 Labyrinth seal with interlocking rotor and seal case insert

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