JP2004316853A - Bearing device for railroad vehicle - Google Patents

Bearing device for railroad vehicle Download PDF

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Publication number
JP2004316853A
JP2004316853A JP2003114600A JP2003114600A JP2004316853A JP 2004316853 A JP2004316853 A JP 2004316853A JP 2003114600 A JP2003114600 A JP 2003114600A JP 2003114600 A JP2003114600 A JP 2003114600A JP 2004316853 A JP2004316853 A JP 2004316853A
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Japan
Prior art keywords
ring
bearing
rear lid
seal
inner ring
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JP2003114600A
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Japanese (ja)
Inventor
Shigeaki Abe
重昭 阿部
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NSK Ltd
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NSK Ltd
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Priority to JP2003114600A priority Critical patent/JP2004316853A/en
Publication of JP2004316853A publication Critical patent/JP2004316853A/en
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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/78Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/7803Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members suited for particular types of rolling bearings
    • F16C33/7813Sealings 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/76Sealings of ball or roller bearings
    • F16C33/80Labyrinth sealings
    • F16C33/805Labyrinth sealings in addition to other sealings, e.g. dirt guards to protect sealings with sealing lips
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22Bearings 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
    • F16C19/34Bearings 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
    • F16C19/38Bearings 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
    • F16C19/383Bearings 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
    • F16C19/385Bearings 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
    • F16C19/386Bearings 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
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00Articles relating to transporting
    • F16C2326/10Railway vehicles

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a railroad vehicle capable of grinding the whole surface of a seal sliding-contact face easily and safely and improving reliability while avoiding damage to an axle. <P>SOLUTION: This bearing device 10 for a railroad vehicle comprises a bearing 11 having an inner ring 14, an outer ring 16, a plurality of rolling bodies 18 rollably disposed in the peripheral direction between the inner ring 14 and the outer ring 16, an inner ring contact member 22 disposed so as to come into contact with the inner ring 14 of the bearing 11, and a sealing device 13 which has a sealing member 27 and seals a bearing space in the bearing 11. The sealing device 13 is formed independently of the inner ring contact member 22 and is fitted onto the outer periphery of the inner ring contact member 22 and includes a ring member 26 with which the seal member 17 is brought into sliding contact. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

【0001】
【発明の属する技術分野】
本発明は、鉄道車両用の車軸に用いられる軸受装置に関する。
【0002】
【従来の技術】
鉄道車両用軸受装置の一例として図12に示される軸受装置150は、複列円すいころ軸受151と、軸受部品152と、一対の密封装置153,153と、を備えており、車軸1の先端側に配された一方の密封装置153は、外輪156の外側端部と前蓋油切り157との間に組み付けられており、前蓋油切り157に形成されたシール摺接面158に摺接するシール部材159を有する。車軸1の基端側に配された他方の密封装置153は、外輪156の外側端部と後蓋160との間に組み付けられており、後蓋160に形成されたシール摺接面161に摺接するシール部材162を有する。前蓋油切り157および後蓋160は、外周部にノックピン163,164が嵌着されることにより環状部材165,166が組み付けられている。環状部材165,166は、それらの内周部に配されるシール部材159,162に塵埃や雨水が直接かからないようにしている。
【0003】
更に、鉄道車両用軸受装置の一例として図13に示される軸受装置170は、複列円すいころ軸受171と、軸受部品172と、一対の密封装置173,173と、を備えており、車軸1の先端側に配された一方の密封装置173は、外輪174の外側端部と前蓋175との間に組み付けられており、前蓋175に内嵌された油切り176の外周面に形成されたシール摺接面177に摺接するシール部材178を有する。車軸1の基端側に配された他方の密封装置173は、外輪174の外側端部と後蓋179との間に組み付けられており、後蓋179に内嵌された油切り180の外周面に形成されたシール摺接面181に摺接するシール部材182を有する(例えば、非特許文献1参照)。
【0004】
【非特許文献1】
日本精工株式会社発行カタログ「転がり軸受」(CAT.No.1101e 第B340頁〜第B351頁)
【0005】
尚、通常、上記軸受装置150における前蓋油切り157のシール摺接面158および後蓋160のシール摺接面161、ならびに上記軸受装置170における油切り176のシール摺接面177および油切り180のシール摺接面181は、各々、シール部材との摩耗を軽減するために表面粗さを必要とする。また、前蓋油切り157,後蓋160、および油切り176,油切り180は、それら自体の摩耗を少なくするために表面硬さを必要とする。そのため、各シール摺接面158,161,177,181の軸方向全面に熱処理や硬質クロムメッキ処理を施し研削加工を施す必要がある。
【0006】
【発明が解決しようとする課題】
上記鉄道車両用軸受装置150では、環状部材165,166を取り外した状態で、各シール摺接面158,161に研削加工を施してから、環状部材165,166を前蓋油切り157,後蓋160に取り付けるように構成することにより、各シール摺接面158,161の全面が研削されるものの、環状部材165,166の取り扱い時に起こりうる、他の部材との衝突等、によって、環状部材165,166が変形したり、走行中の衝撃や振動によっては、ノックピン163,164や環状部材165,166が抜け落ちたりする可能性がある。そのため、その変形および脱落の防止対策を施す必要があり、管理項目が増加するばかりか、環状部材165,166およびノックピン163,164の採用によって部品点数が増えるので、製造工程が複雑化する。
【0007】
また、上記鉄道車両用軸受装置170では、油切り176,180を取り外した状態で、各シール摺接面177,181に研削加工を施してから、油切り176,180を前蓋175,後蓋179に取り付けるように構成することにより、各シール摺接面177,181の全面が研削されるものの、走行中の車軸1の撓み、衝撃および振動によって、油切り180と後蓋179との嵌合面にフレッチング摩耗が生じ、特にフレッチング摩耗の進行が著しい場合には、油切り180と後蓋179と、の拘束力が無くなる結果、各シール部材の摩擦力で油切り176,180が連れ回り、車軸1を損傷する可能性がある。
【0008】
本発明は、上記事情に鑑みてなされたものであり、その目的は、シール摺接面全面の研削加工を容易且つ安全に実施することができるとともに、車軸への損傷を回避し且つ、信頼性の向上を図れる鉄道車両用軸受装置を提供することにある。
【0009】
【課題を解決するための手段】
前述した目的を達成するために、本発明に係る鉄道車両用軸受装置は、下記(1)に記載したように、
(1) 内輪、外輪、および当該内外輪間で周方向に転動自在に配設された複数の転動体、を有する軸受と、
当該軸受の内輪に当接するように配置された内輪当接部材と、
シール部材を有し、前記軸受内の軸受空間を密封する密封装置と、
を備えた鉄道車両用軸受装置であって、
前記密封装置が、前記内輪当接部材とは独立して形成されて当該内輪当接部材の外周部に外嵌され、前記シール部材が摺接するリング部材を有することを特徴としている。
【0010】
上記(1)に記載の発明によれば、シール部材が、内輪当接部材とは独立して形成されて内輪当接部材の外周部に外嵌されたリング部材に摺接するので、従来のもののような、ノックピンや環状部材、等を用いる場合と比べて、簡素な構造となる。それによって、管理項目の増加や部品点数の増大を回避することができるとともに製造工程が複雑にならない。また、研削加工は、内輪当接部材とは別体のリング部材に施されるため、研削砥石が干渉することなく、シール摺接面全面を研削することができる。また、リング部材は、内輪当接部材のように、軸受組み込み時、軸受取り外し時、走行中の軸方向荷重負荷時、等に荷重を受けることがないので、強度について充分な吟味をする必要性が低くなる。それによって、比較的高価な軸受鋼を用いることなく、安価な材料を採用することができるので、コスト面でも有利となる。また、リング部材は、内輪当接部材とは独立して形成されているため、フレッチング摩耗による連れ回りが無くなって、車軸を損傷することがない。
【0011】
また、前述した目的を達成するために、本発明に係る鉄道車両用軸受装置は、下記(2)に記載したように、
(2) 前記密封装置が、前記リング部材の軸方向近傍に、接触、或いは、非接触、のラビリンスを有することを特徴としている。
【0012】
上記(2)に記載の発明によれば、シール部材が摺接するリング部材の軸方向近傍にラビリンスが配されることにより、密封装置に封入された潤滑剤の漏洩を、密封装置の近傍において、ラジアル方向、および、アキシアル方向で確実に防止することができる。
【0013】
【発明の実施の形態】
以下、本発明に係る複数の好適な実施形態を添付図面に基づいて詳細に説明する。
【0014】
まず、図1および図2を参照して、本発明に係る第1実施形態である鉄道車両用軸受装置(以後、『鉄道車両用軸受装置』または単に『軸受装置』と記述する。)を説明する。
【0015】
図1は本発明の鉄道車両用軸受装置の第1実施形態を示す断面図、そして図2は図1に示す鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0016】
図1に示される本発明の第1実施形態である鉄道車両用軸受装置10は、複列円すいころ軸受(以後、『複列円すいころ軸受』または単に『軸受』と記述する。)11と、軸受部品12と、一対の密封装置13,13と、を備えている。
【0017】
複列円すいころ軸受11は、円錐外面状に傾斜した内輪軌道面15,15を外周面に有する一対の内輪14,14と、円錐外面状に傾斜した一対の外輪軌道面17,17を内周面に有する単一の外輪16と、を含む。加えて、複列円すいころ軸受10は、内輪14,14の内輪軌道面15,15と外輪16の外輪軌道面17,17との間に複列で複数配置された円すいころ(即ち、転動体)18と、円すいころ18を転動自在に保持する環状の打ち抜き保持器19,19と、を含む。一対の内輪14,14には、車軸(回転軸)1が内嵌されている。この複列円すいころ軸受11には、種々部材の重量等によるラジアル荷重と任意のアキシアル荷重とが負荷される。
【0018】
内輪14,14の間には、内輪間座20が配されている。また、車軸1の先端側における内輪14の側方には、前蓋油切り(内輪当接部材)21が内輪14に当接するように配置されている。また、車軸1の基端側における内輪14の側方には、後蓋(内輪当接部材)22が内輪14に当接するように配置されている。内輪間座20および前蓋油切り21,後蓋22には、車軸1が内嵌されている。内輪14,14の内輪軌道面15,15は、円すいころ18のアキシアル方向の移動を規制する。外輪16の外輪軌道面17,17と、内輪14,14の内輪軌道面15,15と、円すいころ18とは、それぞれの円錐面の延長上の頂点が軸線上の1点に集まるように設定されている。
【0019】
軸受部品12は、前蓋油切り21と、後蓋22と、ハウジング(不図示)と、を含む。前蓋油切り21は、車軸1の先端側に配された密封装置13の端部を覆うようにして、車軸1の先端部に螺合するボルト23によって固定されている。後蓋22は、車軸1の基端側に配された密封装置13の端部を覆うように配され、車軸1に外嵌されている。
【0020】
密封装置13,13のうち、車軸1の先端側に配された一方の密封装置13は、外輪16の外側端部と前蓋油切り21との間に組み付けられており、前蓋油切り21に外嵌されたリング部材24の外周面に摺接するシール部材25を有する。車軸1の基端側に配された他方の密封装置13は、外輪16の外側端部と後蓋22との間に組み付けられており、後蓋22に外嵌されたリング部材26の外周面に摺接するシール部材27を有する。両リング部材24,26および両シール部材25,27は、それぞれ同一の構造を有するので、ここでは、車軸1の基端側に配された他方の密封装置13等についてのみ詳細に説明する。
【0021】
図2に示すように、密封装置13は、シールケース28と、隔板部材29と、シール部材27と、リング部材26と、を含む。後蓋22の外周部には、密封装置13を覆うように軸方向に突出した外周板部22aが形成されている。シールケース28は、外輪16側から後蓋22に向かうに従って三段階に外径が小さくなる薄肉の金属製部材であって円筒形を有する。シールケース28は、外輪16側に配された一端部が、外輪16の内径面に形成された段部16aに係止され、そして後蓋22側に配された他端部が、後蓋22の内周側に円周方向に形成された凹溝22b内に非接触で配されている。これにより、シールケース28は、外輪16と後蓋22との間において密封装置13の外周部を形成し、密封装置13の内部を覆う。
【0022】
隔板部材29は、薄肉の金属製環状形部材であって断面視L字形を有し、シールケース28の中間部分における内径部に嵌着されている。シール部材27は、環状形を有し、金属製の芯金27aに、主リップ27cとダストリップ27dを有する樹脂部材27bが一体に成形されている。シール部材27は、芯金27aが隔板部材29の内径部に嵌着されることにより、主リップ27cが軸受11側に、そしてダストリップ27dが後蓋22側に配されて、リング部材26に向けて突出する。主リップ27cの外周部には、主リップ27cを内周側へ付勢するためのガータスプリング27eが取り付けられている。主リップ27cと、ダストリップ27dとは、リング部材26の外周面に形成されたシール摺接面26aに摺接する。
【0023】
リング部材26は、鉄、ステンレス鋼、等の比較的安価な金属製部材であって、研削加工の後にメッキや被膜の表面処理が施されており、予め定められた径方向の厚さを有する環状形に形成されている。リング部材26は、後蓋22に有する筒形状部22cの外周面22dに対して締め代を有して外嵌されている。リング部材26は、後蓋22とは別体に形成されており、外周面全面に研削加工が施されることによってシール摺接面26aが形成されてから、後蓋22の筒形状部22cに嵌着される。
【0024】
密封装置13は、シールケース28の後蓋22側に配された他端部が後蓋22の凹溝22b内に非接触で配され、シールケース28の中間部が後蓋22の外周板部22aの内周側に配されているため、ダストリップ27dの軸方向後側と、シールケース28の他端部と後蓋22の凹溝22bとの間部分と、後蓋22の外周板部22aの内周部分と、に連通するラビリンス部(ラビリンス)30が近接して形成されている。
【0025】
鉄道車両用軸受装置10においては、後蓋22とは独立して形成されて後蓋22の外周部に外嵌されたリング部材26にシール部材27が摺接し、密封装置13が、リング部材27の軸方向近傍に、非接触のラビリンス部30を有する。
【0026】
従って、従来のもののような、ノックピンや環状部材、等を用いる場合と比べて、簡素な構造となる。それによって、管理項目の増加や部品点数の増大を回避することができるとともに製造工程が複雑にならない。また、研削加工は、後蓋22とは別体のリング部材26に施されるため、リング部材26を後蓋22に嵌着する前に研削砥石を用いて行なわれる。よって、当該研削砥石をリング部材26以外の周辺部材に干渉させることなくシール摺接面26a全面を研削することができる。また、リング部材26は、後蓋22のように、軸受組み込み時、軸受取り外し時、走行中の軸方向荷重負荷時、に荷重を受けることがないので、強度について充分な吟味をする必要性が低くなる。それによって、比較的高価な軸受鋼を用いることなく、安価な材料を採用することができるので、コスト面でも有利となる。また、リング部材26は、後蓋22とは独立して形成されているため、フレッチング摩耗による連れ回りが無くなって、車軸を損傷することがない。また、シール部材27が摺接するリング部材26の軸方向近傍にラビリンス部30が配されることにより、密封装置13に封入された潤滑剤の漏洩を、密封装置13の近傍において、ラジアル方向、および、アキシアル方向で確実に防止することができる。
【0027】
尚、シール部材27が摺接する相手部材は、シール部材27の摩耗を少なくするために所定範囲の表面粗さや表面硬さ等を要求される。そのため、シール部材27が接触する相手部材に焼入れや硬質クロムメッキ処理を施し研削加工を行なうのが一般的である。相手部材が後蓋22であると、当該後蓋22にはシール摺接面が設けられるので、そのシール摺接面に研削加工等を行なうこととなる。ところが、後蓋22の外周板部22aが、シール摺接面を覆って軸方向に突出配置されているため、そのシール摺接面の全長に亘って研削加工を行なうことができない。そのため、そのシール摺接面の長さを軸方向に長くする必要がある。しかし、鉄道車両用軸受装置10では、後蓋22とは独立したリング部材26を用いているので、研削加工の際の砥石干渉を生ずることがなくなる。その上、リング部材26におけるシール摺接面26aへの研削加工を行なうだけになるので、後蓋のシール摺接面を延長させる必要がなくなり、結果として、シール部材27の軸方向長さをも短くすることができる。
【0028】
次に、図3を参照して本発明に係る第2実施形態を説明する。図3は本発明の第2実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。以下、第2実施形態の説明を含む各実施形態の説明において、既に説明した部材等と同様な構成ならびに作用を有する部材等については、図中に同一符号または相当符号を付すことにより、説明を簡略化或いは省略する。
【0029】
図3に示される本発明の第2実施形態である鉄道車両用軸受装置40は、密封装置41において、後蓋(内輪当接部材)42における筒形状部42cの外周面にリング部材43が外嵌され、リング部材43が後蓋42にノックピン45を介して結合されている。
【0030】
リング部材43は、予め定められた径方向の厚さを有する環状形に形成されており、後蓋42に有する筒形状部42cの外周面42dに対して締め代を有して外嵌されている。リング部材43は、後蓋42とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面43aが形成されてから、後蓋42にノックピン45が嵌入されることにより位置決めされて、後蓋42の筒形状部42cに嵌着される。
【0031】
密封装置41は、シールケース28の後蓋42側に配された他端部が後蓋42の凹溝42b内に非接触で配されているため、ダストリップ27dの軸方向後側と、シールケース28の他端部と後蓋42の凹溝42bとの間部分と、に連通するラビリンス部44が近接して形成されている。第2実施形態に係る鉄道車両用軸受装置40は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0032】
次に、図4を参照して本発明に係る第3実施形態を説明する。図4は本発明の第3実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0033】
図4に示される本発明の第3実施形態である鉄道車両用軸受装置50は、密封装置51において、後蓋(内輪当接部材)52における筒形状部52cの外周面にリング部材53が外嵌されている。
【0034】
リング部材53は、比較的薄肉の金属製板部材をプレス加工することにより成形されており、後端部にフランジ53bを有する断面視L字形の環状形に形成されており、後蓋52に有する筒形状部52cの外周面52dに対して締め代を有して外嵌されている。リング部材53は、フランジ53bが、シールケース28の他端部の内周側に非接触で配されている。リング部材53は、後蓋52とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面53aが形成されてから、後蓋52の筒形状部52cに嵌着される。
【0035】
密封装置51は、リング部材53のフランジ53bがシールケース28の他端部の内周側に非接触で配されているため、ダストリップ27dの軸方向後側と、シールケース28の他端部とフランジ53bとの間部分と、に連通するラビリンス部54が近接して形成されている。第3実施形態に係る鉄道車両用軸受装置50は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0036】
次に、図5を参照して本発明に係る第4実施形態を説明する。図5は本発明の第4実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0037】
図5に示される本発明の第4実施形態である鉄道車両用軸受装置60は、密封装置61において、後蓋(内輪当接部材)62における筒形状部62cの外周面にリング部材63が外嵌されている。この場合、シールケース28の他端部には、2枚に折り重ねられた重合板部28aが設けられており、重合板部28aが後蓋62の外周板部62aの内周側に非接触に配されている。
【0038】
リング部材63は、予め定められた径方向の厚さを有し、後端部にフランジ63bを有する断面視L字形の環状形に形成されており、後蓋62に有する筒形状部62cの外周面62dに対して締め代を有して外嵌されている。リング部材63は、フランジ63bが、シールケース28の重合板部28aの内周側に非接触で配されている。リング部材63は、後蓋62とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面63aが形成されてから、後蓋62の筒形状部62cに嵌着される。
【0039】
密封装置61は、リング部材63のフランジ63bがシールケース28の重合板部28aの内周側に非接触で配され,シールケース28の重合板部28aが後蓋62の外周板部62aの内周側に非接触に配されているため、ダストリップ27dの軸方向後側と、シールケース28の重合板部28aと後蓋62との間部分と、に連通するラビリンス部64が近接して形成されている。第4実施形態に係る鉄道車両用軸受装置60は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0040】
次に、図6を参照して本発明に係る第5実施形態を説明する。図6は本発明の第5実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0041】
図6に示される本発明の第5実施形態である鉄道車両用軸受装置70は、密封装置71において、後蓋(内輪当接部材)72における筒形状部72cの外周面にリング部材73が外嵌されている。この場合、シール部材27は、シールケース28の端部を芯金として樹脂部材27bが一体成形されており、外周部に後蓋72の外周板部72aに摺接する補助リップ27gが形成されている。
【0042】
リング部材73は、予め定められた径方向の厚さを有し、後蓋72に有する筒形状部72cの外周面72dに対して締め代を有して外嵌されている。リング部材73は、内輪14側の端部に、リング部材73を後蓋72から取り外す際に、治具を挿入するための凹溝状をなす治具挿入孔73bが形成されている。リング部材73は、後蓋72とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面73aが形成されてから、後蓋72の筒形状部72cに嵌着される。
【0043】
密封装置71は、ダストリップ27dの軸方向後側と、後蓋72の外周板部72aと補助リップ27gとの間部分と、に連通するラビリンス部74が近接して形成されている。第5実施形態に係る鉄道車両用軸受装置70は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0044】
次に、図7を参照して本発明に係る第6実施形態を説明する。図7は本発明の第6実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0045】
図7に示される本発明の第6実施形態である鉄道車両用軸受装置80は、密封装置81において、後蓋(内輪当接部材)82における筒形状部82cの外周面82dに対して締め代を有してリング部材83が外嵌されている。また、シール部材27は、シールケース28の端部を芯金として樹脂部材27bが一体成形されており、外周部に後蓋82に摺接する補助リップ27gが形成されている。そして、後蓋82は、内輪14との間に、金属同士の接触を避けるための樹脂部材85を有している。
【0046】
リング部材83は、予め定められた径方向の厚さを有し、後蓋82に有する筒形状部82cの外周面82dに対して締め代を有して外嵌されている。リング部材83は、後蓋82とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面83aが形成されてから、後蓋82の筒形状部82cに嵌着される。
【0047】
密封装置81は、ダストリップ27dの軸方向後側と、後蓋82と補助リップ27gとの間部分と、に連通するラビリンス部84が近接して形成されている。第6実施形態に係る鉄道車両用軸受装置80は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0048】
次に、図8を参照して本発明に係る第7実施形態を説明する。図8は本発明の第7実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0049】
図8に示される本発明の第7実施形態である鉄道車両用軸受装置90は、密封装置91において、後蓋(内輪当接部材)92における筒形状部92cの外周面にリング部材93が外嵌されている。この場合、シールケース28の他端部には、2枚に折り重ねられた重合板部28aが設けられており、重合板部28aが後蓋92の外周板部92aの内周側に非接触に配されている。
【0050】
リング部材93は、比較的薄肉の金属製板部材をプレス加工することにより成形されており、後端部に断面視コ字形のフランジ93bを有する環状形に形成されており、後蓋92に有する筒形状部92cの外周面92dに対して締め代を有して外嵌されている。リング部材93は、フランジ93bが、シールケース28の重合板部28aに非接触で配されている。リング部材93は、後蓋92とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面93aが形成されてから、後蓋92の筒形状部92cに嵌着される。
【0051】
密封装置91は、リング部材93のフランジ93bがシールケース28の重合部28aの内周側に非接触で配され、シールケース28の重合部28aが後蓋92の外周板部92aの内周側に非接触に配されているため、ダストリップ27dの軸方向後側と、フランジ93bとシールケース28の重合部28aとの間部分と、シールケース28の重合部28aと後蓋92の外周板部92aとの間部分と、に連通するラビリンス部94が近接して形成されている。第7実施形態に係る鉄道車両用軸受装置90は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0052】
次に、図9を参照して本発明に係る第8実施形態を説明する。図9は本発明の第8実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0053】
図9に示される本発明の第8実施形態である鉄道車両用軸受装置100は、密封装置101において、後蓋(内輪当接部材)102における筒形状部102cの外周面にリング部材103が外嵌されている。また、後蓋102は、内輪14との間に、金属同士の接触を避けるための樹脂部材105を有している。
【0054】
リング部材103は、比較的薄肉の金属製板部材をプレス加工することにより成形されており、先端部に断面視L字形の折曲部103cを有するとともに、後端部に断面視コ字形のフランジ103bを有する環状形に形成されている。リング部材103は、後蓋102に有する筒形状部102cの外周面102dに対して締め代を有して外嵌されている。リング部材103は、後蓋102とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面103aが形成されてから、後蓋102の筒形状部102cに嵌着される。
【0055】
密封装置101は、リング部材103のフランジ103bがシールケース28の他端部の内周側に非接触で配され、シールケース28の他端部が後蓋102の外周板部102aの内周側に非接触に配されているため、ダストリップ27dの軸方向後側と、フランジ103bとシールケース28の他端部との間部分と、シールケース28の他端部と後蓋102の外周板部102aとの間部分と、に連通するラビリンス部104が近接して形成されている。第8実施形態に係る鉄道車両用軸受装置100は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0056】
次に、図10を参照して本発明に係る第9実施形態を説明する。図10は本発明の第9実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0057】
図10に示される本発明の第9実施形態である鉄道車両用軸受装置110は、密封装置111において、後蓋(内輪当接部材)112における筒形状部112cの外周面にリング部材113が外嵌されている。
【0058】
リング部材113は、比較的薄肉の金属製板部材をプレス加工することにより成形されており、後端部に断面視コ字形のフランジ113bを有する環状形に形成されている。リング部材113は、後蓋112に有する筒形状部112cの外周面112dに対して締め代を有して外嵌されている。リング部材113は、後蓋112とは別体に形成されており、外周面全面に研削加工が施されることによって、両リップ27c,27dが摺接するシール摺接面113aが形成されてから、後蓋112の筒形状部112cに嵌着される。
【0059】
密封装置111は、リング部材113のフランジ113bがシールケース28の他端部の内周側に非接触で配され、シールケース28の他端部が後蓋112の外周板部112aの内周側に非接触に配されているため、ダストリップ27dの軸方向後側と、フランジ113bとシールケース28の他端部との間部分と、シールケース28の他端部と後蓋112の外周板部112aとの間部分と、に連通するラビリンス部114が近接して形成されている。第9実施形態に係る鉄道車両用軸受装置110は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0060】
続いて、図11を参照して本発明に係る第10実施形態を説明する。図11は本発明の第10実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【0061】
図11に示される本発明の第10実施形態である鉄道車両用軸受装置120は、密封装置121において、後蓋(内輪当接部材)122における筒形状部122cの外周面にリング部材123が外嵌されている。この場合、シール部材27は、シールケース28の端部を芯金として樹脂部材27bが一体成形されている。また、シール部材27は、シールケース28の外周側に突出したフランジを有する環状形のフランジ板部材27fが外周部に結合されており、フランジ板部材27fのフランジが、後蓋122の外周板部122aの内周部に非接触に配されている。
【0062】
リング部材123は、比較的薄肉の金属製板部材をプレス加工することにより成形されており、後端部にフランジ123bを有する断面視L字形の環状形に形成されており、後蓋122に有する筒形状部122cの外周面122dに対して締め代を有して外嵌されている。リング部材123は、フランジ123bが、シールケース28に非接触で配されている。リング部材123は、後蓋122とは別体に形成されており、外周面全面に研削加工等による粗さ改善が施されることによってシール摺接面123aが形成されてから、後蓋122の筒形状部122cに嵌着される。
【0063】
密封装置121は、リング部材123のフランジ123bがシールケース28に非接触で配されているため、ダストリップ27dの軸方向後側と、フランジ板部材27fと後蓋122の外周板部122aとの間部分と、に連通するラビリンス部124が近接して形成されている。第10実施形態に係る鉄道車両用軸受装置120は、第1実施形態と略同様な作用および効果を有し、その他特有の作用および効果は容易に類推可能であるため、それらの記述は省略する。
【0064】
尚、本発明は上述した実施形態に限定されるものではなく、適宜な変形、改良、等が可能である。
【0065】
例えば、鉄道車両用軸受装置に用いられるシール部材は、その樹脂部材をゴム部材としてもよく、また、その芯金を金属製のものではなく、樹脂製のものにしても良い。
【0066】
また、ラビリンス部(ラビリンス)は、後蓋および前蓋油切りの外周部に配されるハウジングとの間に配されても良く、その場合には、ハウジングの内周部を後蓋、前蓋油切りの外周面に非接触に配置すれば良い。
【0067】
【発明の効果】
以上、説明したように、本発明によれば、シール部材が、内輪当接部材とは独立して形成されて内輪当接部材の外周部に外嵌されたリング部材に摺接するので、従来のもののような、ノックピンや環状部材、等を用いる場合と比べて、簡素な構造となる。それによって、管理項目の増加や部品点数の増大を回避することができるとともに製造工程が複雑にならない。また、研削加工は、内輪当接部材とは別体のリング部材に施されるため、研削砥石が干渉することなく、シール摺接面全面を研削することができる。また、リング部材は、内輪当接部材のように、軸受組み込み時、軸受取り外し時、走行中の軸方向荷重負荷時、等に荷重を受けることがないので、強度について充分な吟味をする必要性が低くなる。それによって、比較的高価な軸受鋼を用いることなく、安価な材料を採用することができるので、コスト面でも有利となる。また、リング部材は、内輪当接部材とは独立して形成されているため、フレッチング摩耗による連れ回りが無くなって、車軸を損傷することがない。
【0068】
また、本発明によれば、シール部材が摺接するリング部材の軸方向近傍にラビリンスが配されることにより、密封装置に封入された潤滑剤の漏洩を、密封装置の近傍において、ラジアル方向、および、アキシアル方向で確実に防止することができる。
【図面の簡単な説明】
【図1】本発明の第1実施形態である鉄道車両用軸受装置の断面図である。
【図2】図1に示した鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図3】本発明の第2実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図4】本発明の第3実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図5】本発明の第4実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図6】本発明の第5実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図7】本発明の第6実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図8】本発明の第7実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図9】本発明の第8実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図10】本発明の第9実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図11】本発明の第10実施形態である鉄道車両用軸受装置に用いられる密封装置の要部の拡大断面図である。
【図12】鉄道車両用軸受装置の一例の断面図である。
【図13】図12とは異なる構成の従来の鉄道車両用軸受装置の断面図である。
【符号の説明】
10,40,50,60,70,80,90,100,110,120 鉄道車両用軸受装置
11 複列円すいころ軸受(軸受)
13,41,51,61,71,81,91,101,111,121 密封装置
14 内輪
16 外輪
18 円すいころ(転動体)
21 前蓋油切り(内輪当接部材)
22,42,52,62,72,82,92,102,112,122 後蓋(内輪当接部材)
24,26,43,53,63,73,83,93,103,113,123
リング部材
25,27 シール部材
30,44,54,64,74,84,94,104,114,124 ラビリンス部(ラビリンス)
[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a bearing device used for an axle for a railway vehicle.
[0002]
[Prior art]
A bearing device 150 shown in FIG. 12 as an example of a railway vehicle bearing device includes a double-row tapered roller bearing 151, a bearing component 152, and a pair of sealing devices 153, 153. Is mounted between the outer end of the outer ring 156 and the front lid oil grease 157, and the sealing device 153 slides on a seal sliding contact surface 158 formed on the front lid oil grease 157. It has a member 159. The other sealing device 153 disposed on the base end side of the axle 1 is assembled between the outer end of the outer ring 156 and the rear lid 160, and slides on a seal sliding contact surface 161 formed on the rear lid 160. It has a sealing member 162 in contact therewith. The annular members 165 and 166 are assembled by fitting the knock pins 163 and 164 to the outer peripheral portions of the front lid oil cutout 157 and the rear lid 160. The annular members 165 and 166 prevent dust and rainwater from directly splashing on the seal members 159 and 162 disposed on the inner peripheral portions thereof.
[0003]
Furthermore, a bearing device 170 shown in FIG. 13 as an example of a railway vehicle bearing device includes a double-row tapered roller bearing 171, a bearing component 172, and a pair of sealing devices 173, 173. One sealing device 173 disposed on the distal end side is assembled between the outer end of the outer ring 174 and the front cover 175, and is formed on the outer peripheral surface of the oil drain 176 fitted inside the front cover 175. There is a seal member 178 that slides on the seal sliding contact surface 177. The other sealing device 173 arranged on the base end side of the axle 1 is assembled between the outer end of the outer ring 174 and the rear lid 179, and the outer peripheral surface of the oil drain 180 fitted inside the rear lid 179. (See, for example, Non-Patent Literature 1).
[0004]
[Non-patent document 1]
Catalog "Rolling Bearing" published by NSK Ltd. (CAT. No. 1101e, page B340 to page B351)
[0005]
Usually, the seal sliding surface 158 of the front lid oil drain 157 and the seal sliding contact surface 161 of the rear lid 160 in the bearing device 150, and the seal sliding contact surface 177 and the oil drain 180 of the oil drain 176 in the bearing device 170 are provided. Each of the seal sliding contact surfaces 181 needs a surface roughness in order to reduce abrasion with the seal member. Further, the front lid grease 157, the rear lid 160, the oil grease 176, and the oil grease 180 require surface hardness in order to reduce their own wear. Therefore, it is necessary to apply heat treatment or hard chrome plating to the entire surface of each of the seal sliding contact surfaces 158, 161, 177, and 181 in the axial direction, and to perform grinding.
[0006]
[Problems to be solved by the invention]
In the railcar bearing device 150, the seal members 165 and 161 are ground after the annular members 165 and 166 are removed, and then the annular members 165 and 166 are subjected to the front cover oil removal 157 and the rear cover. Although the entire surface of each of the seal sliding surfaces 158 and 161 is ground by being configured to be attached to the annular member 160, the annular member 165 may be damaged by collision with another member or the like which may occur when the annular members 165 and 166 are handled. , 166 may be deformed, or the knock pins 163, 164 and the annular members 165, 166 may fall off depending on the impact or vibration during traveling. Therefore, it is necessary to take measures to prevent the deformation and falling off, and not only the number of control items increases, but also the number of parts increases due to the adoption of the annular members 165 and 166 and the knock pins 163 and 164, which complicates the manufacturing process.
[0007]
In the above-mentioned railcar bearing device 170, after the oil slides 176, 180 are removed, the respective seal sliding contact surfaces 177, 181 are ground, and then the oil seals 176, 180 are attached to the front cover 175, the rear cover. Although the entire surface of each of the seal sliding surfaces 177 and 181 is ground by being configured to be attached to the 179, the oil drain 180 and the rear lid 179 are fitted by the deflection, impact and vibration of the running axle 1. Fretting wear occurs on the surface, especially when the progress of fretting wear is remarkable, as a result of the loss of the restraining force between the oil drain 180 and the rear lid 179, the oil drains 176 and 180 rotate with the frictional force of each seal member, The axle 1 may be damaged.
[0008]
SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to enable easy and safe grinding of the entire surface in contact with a seal, avoid damage to an axle, and improve reliability. It is an object of the present invention to provide a railway vehicle bearing device capable of improving the performance.
[0009]
[Means for Solving the Problems]
In order to achieve the above-described object, a railway vehicle bearing device according to the present invention includes:
(1) a bearing having an inner ring, an outer ring, and a plurality of rolling elements disposed so as to freely roll in the circumferential direction between the inner and outer rings;
An inner ring contact member arranged to contact the inner ring of the bearing,
A sealing device that has a sealing member and seals a bearing space in the bearing,
A railway vehicle bearing device comprising:
The sealing device is characterized in that it has a ring member which is formed independently of the inner ring contact member, is externally fitted to the outer peripheral portion of the inner ring contact member, and is in sliding contact with the seal member.
[0010]
According to the invention described in the above (1), the seal member is formed independently of the inner ring contact member and slidably contacts the ring member externally fitted to the outer peripheral portion of the inner ring contact member. The structure becomes simpler than the case where the knock pin or the annular member is used. As a result, an increase in management items and an increase in the number of parts can be avoided, and the manufacturing process does not become complicated. In addition, since the grinding is performed on the ring member separate from the inner ring contact member, the entire surface of the seal sliding contact can be ground without interference of the grinding wheel. In addition, since the ring member does not receive a load like the inner ring abutment member when installing the bearing, removing the bearing, or applying an axial load while running, etc., it is necessary to thoroughly examine the strength. Becomes lower. Thereby, an inexpensive material can be adopted without using relatively expensive bearing steel, which is advantageous in terms of cost. In addition, since the ring member is formed independently of the inner ring contact member, the ring member does not rotate due to fretting wear and does not damage the axle.
[0011]
In addition, in order to achieve the above-mentioned object, a railway vehicle bearing device according to the present invention includes:
(2) The sealing device has a contact or non-contact labyrinth near the axial direction of the ring member.
[0012]
According to the invention described in the above (2), since the labyrinth is disposed near the axial direction of the ring member with which the seal member slides, leakage of the lubricant sealed in the sealing device can be reduced in the vicinity of the sealing device. It can be reliably prevented in the radial direction and the axial direction.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.
[0014]
First, a railcar bearing device (hereinafter, referred to as a "railroad vehicle bearing device" or simply as a "bearing device") according to a first embodiment of the present invention will be described with reference to FIGS. I do.
[0015]
FIG. 1 is a sectional view showing a first embodiment of a railway vehicle bearing device of the present invention, and FIG. 2 is an enlarged sectional view of a main part of a sealing device used in the railway vehicle bearing device shown in FIG.
[0016]
A railway vehicle bearing device 10 according to a first embodiment of the present invention shown in FIG. 1 includes a double-row tapered roller bearing (hereinafter, referred to as a “double-row tapered roller bearing” or simply “bearing”) 11. It includes a bearing component 12 and a pair of sealing devices 13, 13.
[0017]
The double row tapered roller bearing 11 includes a pair of inner races 14, 14 having inner raceway surfaces 15, 15 inclined on a conical outer surface on an outer peripheral surface, and a pair of outer raceway surfaces 17, 17 inclined on a conical outer surface. And a single outer ring 16 on the surface. In addition, the double-row tapered roller bearing 10 includes a plurality of double-row tapered rollers (that is, rolling elements) disposed between the inner raceway surfaces 15 and 15 of the inner races 14 and the outer raceway surfaces 17 and 17 of the outer race 16. ) 18 and annular punching holders 19, 19 for rotatably holding the tapered rollers 18. An axle (rotating shaft) 1 is fitted in the pair of inner rings 14, 14. The double-row tapered roller bearing 11 is subjected to a radial load and an arbitrary axial load due to the weight of various members and the like.
[0018]
An inner ring spacer 20 is arranged between the inner rings 14. A front lid oil drain (inner ring contact member) 21 is arranged on the side of the inner ring 14 on the tip side of the axle 1 so as to contact the inner ring 14. A rear lid (inner ring contact member) 22 is disposed on the base end side of the axle 1 on the side of the inner ring 14 so as to contact the inner ring 14. The axle 1 is fitted in the inner ring spacer 20, the front lid oil drain 21, and the rear lid 22. The inner raceway surfaces 15, 15 of the inner races 14, 14 regulate the movement of the tapered rollers 18 in the axial direction. The outer raceway surfaces 17, 17 of the outer race 16, the inner raceway surfaces 15, 15 of the inner races 14, 14 and the tapered rollers 18 are set such that the vertices of the respective conical surfaces extend to one point on the axis. Have been.
[0019]
The bearing component 12 includes a front lid oil drain 21, a rear lid 22, and a housing (not shown). The front lid oil cut 21 is fixed by a bolt 23 screwed to the end of the axle 1 so as to cover the end of the sealing device 13 arranged on the end of the axle 1. The rear lid 22 is disposed so as to cover the end of the sealing device 13 disposed on the base end side of the axle 1, and is externally fitted to the axle 1.
[0020]
One of the sealing devices 13, 13 disposed on the tip end side of the axle 1 is assembled between the outer end of the outer race 16 and the front lid oil slit 21, and the front lid oil slit 21 is provided. And a seal member 25 slidingly contacting the outer peripheral surface of the ring member 24 fitted to the outside. The other sealing device 13 disposed on the base end side of the axle 1 is assembled between the outer end of the outer race 16 and the rear lid 22, and has an outer peripheral surface of a ring member 26 fitted to the rear lid 22. And a seal member 27 that slides on the seal member. Since the two ring members 24 and 26 and the two seal members 25 and 27 have the same structure, only the other sealing device 13 and the like disposed on the base end side of the axle 1 will be described in detail here.
[0021]
As shown in FIG. 2, the sealing device 13 includes a seal case 28, a partition member 29, a seal member 27, and a ring member 26. An outer peripheral plate portion 22 a protruding in the axial direction is formed on the outer peripheral portion of the rear lid 22 so as to cover the sealing device 13. The seal case 28 is a thin metal member whose outer diameter decreases in three stages from the outer ring 16 toward the rear lid 22 and has a cylindrical shape. The seal case 28 has one end disposed on the outer ring 16 side engaged with a step 16 a formed on the inner surface of the outer ring 16, and the other end disposed on the rear lid 22 side connected to the rear lid 22. Are arranged in a non-contact manner in a concave groove 22b formed in the circumferential direction on the inner peripheral side of the groove. As a result, the seal case 28 forms the outer peripheral portion of the sealing device 13 between the outer ring 16 and the rear lid 22, and covers the inside of the sealing device 13.
[0022]
The partition member 29 is a thin metal ring-shaped member having an L-shape in cross section, and is fitted to an inner diameter portion at an intermediate portion of the seal case 28. The sealing member 27 has an annular shape, and a resin member 27b having a main lip 27c and a dust lip 27d is integrally formed on a metal core 27a. The seal member 27 is formed by fitting the core bar 27a to the inner diameter portion of the partition plate member 29 so that the main lip 27c is disposed on the bearing 11 side, and the dust lip 27d is disposed on the rear lid 22 side. Protruding toward. A garter spring 27e for urging the main lip 27c inward is attached to an outer peripheral portion of the main lip 27c. The main lip 27c and the dust lip 27d are in sliding contact with a seal sliding contact surface 26a formed on the outer peripheral surface of the ring member 26.
[0023]
The ring member 26 is a relatively inexpensive metal member such as iron, stainless steel, or the like, and is subjected to plating and surface treatment of a coating film after grinding, and has a predetermined radial thickness. It is formed in an annular shape. The ring member 26 is fitted around the outer peripheral surface 22d of the cylindrical portion 22c of the rear lid 22 with an interference. The ring member 26 is formed separately from the rear lid 22, and after the entire outer peripheral surface is subjected to grinding to form a seal sliding contact surface 26 a, the ring member 26 is formed on the cylindrical portion 22 c of the rear lid 22. It is fitted.
[0024]
In the sealing device 13, the other end disposed on the rear lid 22 side of the seal case 28 is disposed in a non-contact manner in the concave groove 22 b of the rear lid 22, and an intermediate portion of the seal case 28 is disposed on the outer peripheral plate portion of the rear lid 22. Since it is arranged on the inner circumferential side of the rear cover 22a, the rear side in the axial direction of the dust lip 27d, the portion between the other end of the seal case 28 and the concave groove 22b of the rear cover 22, and the outer peripheral plate portion of the rear cover 22 A labyrinth portion (labyrinth) 30 communicating with the inner peripheral portion of 22a is formed close to.
[0025]
In the railway vehicle bearing device 10, a seal member 27 slides on a ring member 26 formed independently of the rear cover 22 and externally fitted to the outer peripheral portion of the rear cover 22. , A non-contact labyrinth portion 30 is provided in the vicinity of the axial direction.
[0026]
Therefore, the structure is simpler than when using a knock pin, an annular member, or the like as in the conventional case. As a result, an increase in management items and an increase in the number of parts can be avoided, and the manufacturing process does not become complicated. Further, since the grinding process is performed on the ring member 26 separate from the rear cover 22, the grinding process is performed using a grinding wheel before the ring member 26 is fitted to the rear cover 22. Accordingly, the entire surface of the seal sliding contact surface 26a can be ground without causing the grinding wheel to interfere with peripheral members other than the ring member 26. Further, since the ring member 26 does not receive a load as in the case of the rear lid 22 when a bearing is incorporated, a bearing is removed, or an axial load is applied during traveling, it is necessary to sufficiently examine the strength. Lower. Thereby, an inexpensive material can be adopted without using relatively expensive bearing steel, which is advantageous in terms of cost. Further, since the ring member 26 is formed independently of the rear lid 22, there is no accompanying rotation due to fretting wear and the axle is not damaged. Further, since the labyrinth portion 30 is disposed near the axial direction of the ring member 26 with which the seal member 27 slides, the leakage of the lubricant sealed in the sealing device 13 is reduced in the radial direction near the sealing device 13, and , In the axial direction.
[0027]
The mating member with which the seal member 27 slides is required to have a predetermined range of surface roughness, surface hardness, and the like in order to reduce wear of the seal member 27. For this reason, it is common to apply quenching or hard chrome plating to the mating member with which the seal member 27 comes into contact, and then perform grinding. If the mating member is the rear lid 22, the rear lid 22 is provided with a seal sliding contact surface, so that the seal sliding contact surface is subjected to grinding or the like. However, since the outer peripheral plate portion 22a of the rear lid 22 is disposed so as to protrude in the axial direction so as to cover the seal sliding contact surface, grinding cannot be performed over the entire length of the seal sliding contact surface. Therefore, it is necessary to lengthen the length of the seal sliding contact surface in the axial direction. However, in the railway vehicle bearing device 10, since the ring member 26 independent of the rear lid 22 is used, there is no occurrence of grinding wheel interference at the time of grinding. In addition, since only the grinding process is performed on the seal sliding contact surface 26a of the ring member 26, it is not necessary to extend the seal sliding contact surface of the rear lid, and as a result, the axial length of the seal member 27 is reduced. Can be shorter.
[0028]
Next, a second embodiment according to the present invention will be described with reference to FIG. FIG. 3 is an enlarged sectional view of a main part of a sealing device used in a bearing device for a railway vehicle according to a second embodiment of the present invention. Hereinafter, in the description of each embodiment including the description of the second embodiment, members and the like having the same configurations and operations as the members and the like already described will be described by assigning the same reference numerals or corresponding reference numerals in the drawings. Simplified or omitted.
[0029]
In a bearing device 40 for a railway vehicle according to a second embodiment of the present invention shown in FIG. 3, in a sealing device 41, a ring member 43 is provided on an outer peripheral surface of a cylindrical portion 42 c of a rear lid (inner ring contact member) 42. The ring member 43 is fitted to the rear lid 42 via a knock pin 45.
[0030]
The ring member 43 is formed in an annular shape having a predetermined radial thickness, and is fitted around the outer peripheral surface 42d of the cylindrical portion 42c of the rear lid 42 with a margin. I have. The ring member 43 is formed separately from the rear lid 42, and after the entire outer peripheral surface is ground, a seal sliding contact surface 43a where the two lips 27c and 27d are in sliding contact is formed. The dowel pins 45 are fitted into the rear lid 42 to be positioned and fitted to the cylindrical portion 42c of the rear lid 42.
[0031]
Since the other end of the sealing device 41 disposed on the rear lid 42 side of the seal case 28 is disposed in a non-contact manner in the concave groove 42b of the rear lid 42, the sealing device 41 is sealed with the axially rear side of the dust lip 27d. A labyrinth portion 44 communicating with the portion between the other end of the case 28 and the concave groove 42b of the rear lid 42 is formed close to. The railway vehicle bearing device 40 according to the second embodiment has substantially the same operation and effect as the first embodiment, and other unique operations and effects can be easily analogized. .
[0032]
Next, a third embodiment according to the present invention will be described with reference to FIG. FIG. 4 is an enlarged sectional view of a main part of a sealing device used in a bearing device for a railway vehicle according to a third embodiment of the present invention.
[0033]
In a bearing device 50 for a railway vehicle according to a third embodiment of the present invention shown in FIG. 4, in a sealing device 51, a ring member 53 is provided on the outer peripheral surface of a cylindrical portion 52 c of a rear lid (inner ring contact member) 52. It is fitted.
[0034]
The ring member 53 is formed by pressing a relatively thin metal plate member, and is formed in an L-shaped annular shape in cross section having a flange 53 b at a rear end, and is provided on the rear lid 52. The outer peripheral surface 52d of the cylindrical portion 52c is fitted around the outer peripheral surface 52d with an interference. The flange 53b of the ring member 53 is disposed in a non-contact manner on the inner peripheral side of the other end of the seal case 28. The ring member 53 is formed separately from the rear lid 52, and after the entire outer peripheral surface is subjected to grinding, a seal sliding contact surface 53a where the both lips 27c and 27d are in sliding contact is formed. The rear lid 52 is fitted to the cylindrical portion 52c.
[0035]
In the sealing device 51, the flange 53b of the ring member 53 is disposed in a non-contact manner on the inner peripheral side of the other end of the seal case 28, so that the rear end in the axial direction of the dust lip 27d and the other end of the seal case 28 A labyrinth portion 54 communicating with a portion between the flange and the flange 53b is formed close to each other. The railway vehicle bearing device 50 according to the third embodiment has substantially the same functions and effects as those of the first embodiment, and other specific functions and effects can be easily analogized. .
[0036]
Next, a fourth embodiment according to the present invention will be described with reference to FIG. FIG. 5 is an enlarged sectional view of a main part of a sealing device used in a bearing device for a railway vehicle according to a fourth embodiment of the present invention.
[0037]
In a bearing device 60 for a railway vehicle according to a fourth embodiment of the present invention shown in FIG. 5, in a sealing device 61, a ring member 63 is provided on the outer peripheral surface of a cylindrical portion 62 c of a rear cover (inner ring contact member) 62. It is fitted. In this case, at the other end of the seal case 28, an overlapped plate portion 28a folded in two is provided, and the overlapped plate portion 28a does not contact the inner peripheral side of the outer peripheral plate portion 62a of the rear lid 62. It is arranged in.
[0038]
The ring member 63 has a predetermined thickness in the radial direction, is formed in an annular shape having an L-shaped cross section having a flange 63b at a rear end portion, and has an outer periphery of a cylindrical portion 62c provided in the rear lid 62. It is externally fitted to the surface 62d with an interference. In the ring member 63, the flange 63 b is arranged in a non-contact manner on the inner peripheral side of the overlapping plate portion 28 a of the seal case 28. The ring member 63 is formed separately from the rear lid 62, and after the entire outer peripheral surface is subjected to grinding, a seal sliding contact surface 63a where the two lips 27c and 27d are in sliding contact is formed. The rear cover 62 is fitted to the cylindrical portion 62c.
[0039]
In the sealing device 61, the flange 63 b of the ring member 63 is disposed in non-contact with the inner peripheral side of the overlapped plate portion 28 a of the seal case 28, and the overlapped plate portion 28 a of the seal case 28 is disposed inside the outer peripheral plate portion 62 a of the rear lid 62. The labyrinth portion 64 communicating with the rear portion in the axial direction of the dust lip 27d and the portion between the overlapped plate portion 28a of the seal case 28 and the rear lid 62 is close to the labyrinth portion 64 because the labyrinth portion 64 is disposed in a non-contact manner on the circumferential side. Is formed. The railcar bearing device 60 according to the fourth embodiment has substantially the same operation and effect as the first embodiment, and other specific operations and effects can be easily inferred. .
[0040]
Next, a fifth embodiment according to the present invention will be described with reference to FIG. FIG. 6 is an enlarged sectional view of a main part of a sealing device used in a bearing device for a railway vehicle according to a fifth embodiment of the present invention.
[0041]
In a bearing device 70 for a railway vehicle according to a fifth embodiment of the present invention shown in FIG. 6, in a sealing device 71, a ring member 73 is provided on the outer peripheral surface of a cylindrical portion 72 c of a rear lid (inner ring contact member) 72. It is fitted. In this case, the seal member 27 is formed by integrally molding a resin member 27b with the end of the seal case 28 as a core metal, and an auxiliary lip 27g that is slidably in contact with the outer peripheral plate portion 72a of the rear lid 72 at the outer peripheral portion. .
[0042]
The ring member 73 has a predetermined thickness in the radial direction, and is fitted around the outer peripheral surface 72d of the cylindrical portion 72c of the rear lid 72 with a tight allowance. The ring member 73 has a jig insertion hole 73b in the form of a concave groove for inserting a jig when the ring member 73 is detached from the rear lid 72 at the end on the inner ring 14 side. The ring member 73 is formed separately from the rear lid 72, and after the entire outer peripheral surface is subjected to grinding processing, a seal sliding contact surface 73a where the both lips 27c and 27d are in sliding contact is formed. The rear lid 72 is fitted to the cylindrical portion 72c.
[0043]
In the sealing device 71, a labyrinth portion 74 communicating with the rear side in the axial direction of the dust lip 27d and a portion between the outer peripheral plate portion 72a of the rear lid 72 and the auxiliary lip 27g is formed close to each other. The railway vehicle bearing device 70 according to the fifth embodiment has substantially the same functions and effects as those of the first embodiment, and other specific functions and effects can be easily analogized. .
[0044]
Next, a sixth embodiment according to the present invention will be described with reference to FIG. FIG. 7 is an enlarged sectional view of a main part of a sealing device used in a bearing device for a railway vehicle according to a sixth embodiment of the present invention.
[0045]
A bearing device 80 for a railway vehicle according to a sixth embodiment of the present invention shown in FIG. 7 includes a sealing device 81 in which an interference against an outer peripheral surface 82d of a cylindrical portion 82c of a rear lid (inner ring contact member) 82 is provided. And the ring member 83 is externally fitted. The seal member 27 is formed integrally with a resin member 27b using the end of the seal case 28 as a core metal, and has an auxiliary lip 27g that slides on the rear lid 82 on the outer peripheral portion. The rear lid 82 has a resin member 85 between the inner ring 14 and the metal to avoid contact between metals.
[0046]
The ring member 83 has a predetermined thickness in the radial direction, and is fitted around the outer peripheral surface 82d of the cylindrical portion 82c of the rear lid 82 with a margin. The ring member 83 is formed separately from the rear lid 82, and after the entire outer peripheral surface is subjected to grinding processing, a seal sliding contact surface 83a where the two lips 27c and 27d are in sliding contact is formed. The rear lid 82 is fitted to the cylindrical portion 82c.
[0047]
In the sealing device 81, a labyrinth portion 84 communicating with the rear side in the axial direction of the dust lip 27d and a portion between the rear lid 82 and the auxiliary lip 27g is formed close to each other. The railway vehicle bearing device 80 according to the sixth embodiment has substantially the same functions and effects as those of the first embodiment, and other specific functions and effects can be easily analogized. .
[0048]
Next, a seventh embodiment according to the present invention will be described with reference to FIG. FIG. 8 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a seventh embodiment of the present invention.
[0049]
In a bearing device 90 for a railway vehicle according to a seventh embodiment of the present invention shown in FIG. 8, in a sealing device 91, a ring member 93 is provided on the outer peripheral surface of a cylindrical portion 92 c of a rear lid (inner ring contact member) 92. It is fitted. In this case, at the other end of the seal case 28, a superposed plate portion 28 a folded in two is provided, and the superposed plate portion 28 a does not contact the inner peripheral side of the outer peripheral plate portion 92 a of the rear lid 92. It is arranged in.
[0050]
The ring member 93 is formed by pressing a relatively thin metal plate member, is formed in an annular shape having a U-shaped flange 93b in cross section at the rear end, and is provided on the rear lid 92. The outer peripheral surface 92d of the cylindrical portion 92c is fitted with an interference with an interference. In the ring member 93, the flange 93b is arranged in non-contact with the overlapped plate portion 28a of the seal case 28. The ring member 93 is formed separately from the rear lid 92, and after the entire outer peripheral surface is ground, a seal sliding contact surface 93a where the both lips 27c and 27d are in sliding contact is formed. The rear lid 92 is fitted to the cylindrical portion 92c.
[0051]
In the sealing device 91, the flange 93 b of the ring member 93 is disposed in a non-contact manner on the inner peripheral side of the overlapping portion 28 a of the seal case 28, and the overlapping portion 28 a of the seal case 28 is disposed on the inner peripheral side of the outer peripheral plate portion 92 a of the rear lid 92. , The axially rear side of the dust lip 27d, the portion between the flange 93b and the overlapping portion 28a of the seal case 28, and the outer peripheral plate of the overlapping portion 28a of the seal case 28 and the rear lid 92. A labyrinth portion 94 communicating with a portion between the portion 92a and the portion 92a is formed close to each other. The railway vehicle bearing device 90 according to the seventh embodiment has substantially the same functions and effects as those of the first embodiment, and other specific functions and effects can be easily analogized. .
[0052]
Next, an eighth embodiment according to the present invention will be described with reference to FIG. FIG. 9 is an enlarged sectional view of a main part of a sealing device used for a railway vehicle bearing device according to an eighth embodiment of the present invention.
[0053]
In a railway vehicle bearing device 100 according to an eighth embodiment of the present invention shown in FIG. 9, in a sealing device 101, a ring member 103 is provided on an outer peripheral surface of a cylindrical portion 102 c of a rear lid (inner ring contact member) 102. It is fitted. In addition, the rear lid 102 has a resin member 105 between the inner ring 14 to avoid contact between metals.
[0054]
The ring member 103 is formed by pressing a relatively thin metal plate member, has a bent portion 103c having an L-shaped cross section at the front end, and a U-shaped flange at the rear end. It is formed in an annular shape having 103b. The ring member 103 is fitted around the outer peripheral surface 102d of the cylindrical portion 102c of the rear lid 102 with a tight allowance. The ring member 103 is formed separately from the rear lid 102, and after the entire outer peripheral surface is subjected to grinding, a seal sliding contact surface 103a where the two lips 27c and 27d are in sliding contact is formed. The rear cover 102 is fitted to the cylindrical portion 102c.
[0055]
In the sealing device 101, the flange 103b of the ring member 103 is disposed in non-contact with the inner peripheral side of the other end of the seal case 28, and the other end of the seal case 28 is disposed on the inner peripheral side of the outer peripheral plate 102a of the rear lid 102. , The portion between the flange 103b and the other end of the seal case 28, the other end of the seal case 28, and the outer peripheral plate of the rear lid 102. A labyrinth part 104 communicating with the part between the part 102a and the part 102a is formed close to each other. The railway vehicle bearing device 100 according to the eighth embodiment has substantially the same operations and effects as those of the first embodiment, and other unique operations and effects can be easily inferred. .
[0056]
Next, a ninth embodiment according to the present invention will be described with reference to FIG. FIG. 10 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a ninth embodiment of the present invention.
[0057]
In a railway vehicle bearing device 110 according to a ninth embodiment of the present invention shown in FIG. 10, in a sealing device 111, a ring member 113 is provided on the outer peripheral surface of a cylindrical portion 112 c of a rear lid (inner ring contact member) 112. It is fitted.
[0058]
The ring member 113 is formed by pressing a relatively thin metal plate member, and is formed in an annular shape having a U-shaped flange 113b at the rear end. The ring member 113 is fitted to the outer peripheral surface 112d of the cylindrical portion 112c of the rear lid 112 with a tight allowance. The ring member 113 is formed separately from the rear lid 112, and after the entire outer peripheral surface is subjected to grinding processing, a seal sliding contact surface 113a where the both lips 27c and 27d are in sliding contact is formed. The rear lid 112 is fitted to the cylindrical portion 112c.
[0059]
In the sealing device 111, the flange 113 b of the ring member 113 is disposed in non-contact with the inner peripheral side of the other end of the seal case 28, and the other end of the seal case 28 is disposed on the inner peripheral side of the outer peripheral plate 112 a of the rear lid 112. , The portion between the flange 113b and the other end of the seal case 28, the other end of the seal case 28, and the outer peripheral plate of the rear lid 112. A labyrinth part 114 communicating with the part between the part 112a and the part 112a is formed close to each other. The railcar bearing device 110 according to the ninth embodiment has substantially the same operation and effect as the first embodiment, and other specific operations and effects can be easily inferred. .
[0060]
Subsequently, a tenth embodiment according to the present invention will be described with reference to FIG. FIG. 11 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a tenth embodiment of the present invention.
[0061]
In a bearing device 120 for a railway vehicle according to a tenth embodiment of the present invention shown in FIG. 11, in a sealing device 121, a ring member 123 is provided on an outer peripheral surface of a cylindrical portion 122 c of a rear lid (inner ring contact member) 122. It is fitted. In this case, the resin member 27b is integrally formed with the seal member 27 using the end of the seal case 28 as a core. Further, the seal member 27 has an annular flange plate member 27f having a flange protruding on the outer peripheral side of the seal case 28 joined to the outer peripheral portion, and the flange of the flange plate member 27f is connected to the outer peripheral plate portion of the rear lid 122. It is arranged in a non-contact manner on the inner peripheral portion of 122a.
[0062]
The ring member 123 is formed by pressing a relatively thin metal plate member, is formed in an L-shaped annular shape having a flange 123 b at a rear end, and is provided on the rear lid 122. The outer peripheral surface 122d of the cylindrical portion 122c is fitted around the outer peripheral surface 122d with an interference. In the ring member 123, the flange 123b is arranged in a non-contact manner with the seal case. The ring member 123 is formed separately from the rear lid 122, and after the entire outer peripheral surface is subjected to roughness improvement by grinding or the like to form a seal sliding contact surface 123 a, the ring member 123 is formed. It is fitted to the cylindrical portion 122c.
[0063]
In the sealing device 121, since the flange 123 b of the ring member 123 is arranged in a non-contact manner with the seal case 28, the axially rear side of the dust lip 27 d, the flange plate member 27 f, and the outer peripheral plate portion 122 a of the rear lid 122 are formed. A labyrinth portion 124 communicating with the intervening portion is formed close to. The railway vehicle bearing device 120 according to the tenth embodiment has substantially the same operation and effect as the first embodiment, and other unique operations and effects can be easily inferred. .
[0064]
Note that the present invention is not limited to the above-described embodiment, and appropriate modifications, improvements, and the like can be made.
[0065]
For example, the sealing member used in the railway vehicle bearing device may be a rubber member as the resin member, and the core may be made of resin instead of metal.
[0066]
Further, the labyrinth portion (labyrinth) may be disposed between the rear lid and the housing disposed on the outer peripheral portion of the front lid oil drain. In this case, the inner peripheral portion of the housing is disposed on the rear lid and the front lid. What is necessary is just to arrange | position in the non-contact with the outer peripheral surface of an oil drain.
[0067]
【The invention's effect】
As described above, according to the present invention, according to the present invention, the seal member is formed independently of the inner ring abutment member and slides on the ring member externally fitted to the outer peripheral portion of the inner ring abutment member. It has a simple structure as compared with a case where a knock pin or an annular member is used. As a result, an increase in management items and an increase in the number of parts can be avoided, and the manufacturing process does not become complicated. In addition, since the grinding is performed on the ring member separate from the inner ring contact member, the entire surface of the seal sliding contact can be ground without interference of the grinding wheel. In addition, since the ring member does not receive a load like the inner ring abutment member when installing the bearing, removing the bearing, or applying an axial load while running, etc., it is necessary to thoroughly examine the strength. Becomes lower. Thereby, an inexpensive material can be adopted without using relatively expensive bearing steel, which is advantageous in terms of cost. In addition, since the ring member is formed independently of the inner ring contact member, the ring member does not rotate due to fretting wear and does not damage the axle.
[0068]
Further, according to the present invention, the labyrinth is arranged near the axial direction of the ring member with which the seal member slides, so that the leakage of the lubricant sealed in the sealing device, in the vicinity of the sealing device, in the radial direction, and , In the axial direction.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view of a railway vehicle bearing device according to a first embodiment of the present invention.
FIG. 2 is an enlarged sectional view of a main part of a sealing device used in the railway vehicle bearing device shown in FIG.
FIG. 3 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a second embodiment of the present invention.
FIG. 4 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a third embodiment of the present invention.
FIG. 5 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a fourth embodiment of the present invention.
FIG. 6 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a fifth embodiment of the present invention.
FIG. 7 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a sixth embodiment of the present invention.
FIG. 8 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a seventh embodiment of the present invention.
FIG. 9 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to an eighth embodiment of the present invention.
FIG. 10 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a ninth embodiment of the present invention.
FIG. 11 is an enlarged sectional view of a main part of a sealing device used in a railway vehicle bearing device according to a tenth embodiment of the present invention.
FIG. 12 is a sectional view of an example of a railway vehicle bearing device.
13 is a cross-sectional view of a conventional railway vehicle bearing device having a configuration different from that of FIG.
[Explanation of symbols]
10,40,50,60,70,80,90,100,110,120 Bearing device for railway vehicle
11 Double row tapered roller bearings (bearings)
13, 41, 51, 61, 71, 81, 91, 101, 111, 121 Sealing device
14 Inner ring
16 Outer ring
18 Tapered roller (rolling element)
21 Front lid oil drain (inner ring contact member)
22, 42, 52, 62, 72, 82, 92, 102, 112, 122 Rear lid (inner ring contact member)
24, 26, 43, 53, 63, 73, 83, 93, 103, 113, 123
Ring member
25, 27 Sealing member
30, 44, 54, 64, 74, 84, 94, 104, 114, 124 Labyrinth part (labyrinth)

Claims (2)

内輪、外輪、および当該内外輪間で周方向に転動自在に配設された複数の転動体、を有する軸受と、当該軸受の内輪に当接するように配置された内輪当接部材と、シール部材を有し、前記軸受内の軸受空間を密封する密封装置と、を備えた鉄道車両用軸受装置であって、
前記密封装置が、前記内輪当接部材とは独立して形成されて当該内輪当接部材の外周部に外嵌され、前記シール部材が摺接するリング部材を有することを特徴とする鉄道車両用軸受装置。
A bearing having an inner ring, an outer ring, and a plurality of rolling elements rotatably arranged in the circumferential direction between the inner and outer rings, an inner ring contact member arranged to contact the inner ring of the bearing, and a seal; A bearing device for a railway vehicle, comprising: a member; and a sealing device that seals a bearing space in the bearing.
A bearing for a railway vehicle, wherein the sealing device has a ring member formed independently of the inner ring abutting member, fitted around the outer peripheral portion of the inner ring abutting member, and slidably contacting the sealing member. apparatus.
前記密封装置が、前記リング部材の軸方向近傍に、接触、或いは、非接触、のラビリンスを有することを特徴とする請求項1に記載の鉄道車両用軸受装置。The bearing device for a railway vehicle according to claim 1, wherein the sealing device has a contact or non-contact labyrinth in the vicinity of the ring member in the axial direction.
JP2003114600A 2003-04-18 2003-04-18 Bearing device for railroad vehicle Withdrawn JP2004316853A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003114600A JP2004316853A (en) 2003-04-18 2003-04-18 Bearing device for railroad vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2003114600A JP2004316853A (en) 2003-04-18 2003-04-18 Bearing device for railroad vehicle

Publications (1)

Publication Number Publication Date
JP2004316853A true JP2004316853A (en) 2004-11-11

Family

ID=33474132

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Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008008424A (en) * 2006-06-29 2008-01-17 Ntn Corp Railroad vehicle bearing device
JP2008175395A (en) * 2008-02-04 2008-07-31 Ntn Corp Bearing device for wheel
JP2013228046A (en) * 2012-04-26 2013-11-07 Nsk Ltd Bearing unit for railroad vehicle and method for extracting press-fitting member
DE102004019974B4 (en) * 2003-05-12 2014-02-27 Ntn Corp. Axle bearing of the rail vehicle
JP2016014418A (en) * 2014-07-01 2016-01-28 日本精工株式会社 Sealing device of bearing for railway vehicle

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004019974B4 (en) * 2003-05-12 2014-02-27 Ntn Corp. Axle bearing of the rail vehicle
JP2008008424A (en) * 2006-06-29 2008-01-17 Ntn Corp Railroad vehicle bearing device
JP2008175395A (en) * 2008-02-04 2008-07-31 Ntn Corp Bearing device for wheel
JP2013228046A (en) * 2012-04-26 2013-11-07 Nsk Ltd Bearing unit for railroad vehicle and method for extracting press-fitting member
JP2016014418A (en) * 2014-07-01 2016-01-28 日本精工株式会社 Sealing device of bearing for railway vehicle

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