JP2010101362A - Bearing device for railroad vehicle - Google Patents

Bearing device for railroad vehicle Download PDF

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JP2010101362A
JP2010101362A JP2008271654A JP2008271654A JP2010101362A JP 2010101362 A JP2010101362 A JP 2010101362A JP 2008271654 A JP2008271654 A JP 2008271654A JP 2008271654 A JP2008271654 A JP 2008271654A JP 2010101362 A JP2010101362 A JP 2010101362A
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oil
axle box
flow path
bearing
axle
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JP5182756B2 (en
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Koji Takano
浩二 高野
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Nachi Fujikoshi Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a bearing device for a railroad vehicle less increased in temperature by flow passages and paths with superior lubricating oil circulating efficiencies. <P>SOLUTION: In this bearing device, a first flow passage part 53 and second and third flow passage parts 54, 55 the opening ends of which are at the upper side 52a height of the opening of an oil sump on both sides of the first flow passage part are provided to the edge part 51a of an axle box 5. An outer ring 23 is held and fixed by a rear cover side flange 50 and the bearing retaining part 62 of a front cover 6. First to third communication passages 65, 66, 67 are provided to the partition wall 63 of the bearing retaining part. First to third recessed flow passage parts 56, 57, 58 the opening ends of which are at the upper side height of the opening of the oil sump are provided to the rear cover side edge part 51b. A rear annular flow passage 59 is formed of a flange inner peripheral surface 50b and the recessed flow passage parts. A rear cover is made of an aluminum member. A plurality of cooling fins 75 of sheet cylindrical shape are provided to the rear end. A partition member 8 having a projection 81 in the direction of a shaft rear cover is held and fixed between the flange end surface 50a and the flange end surface 72a of a rear cover faucet engagement part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、鉄道車輌の車軸の軸端部を軸箱に回転可能の支承する鉄道車輌用軸受装置に関し、詳しくは複列円錐又は円筒ころ軸受の潤滑のために軸箱に設けられた油溜まり、及び潤滑流路の改良に関する。   TECHNICAL FIELD The present invention relates to a railway vehicle bearing device in which a shaft end portion of a railway vehicle axle is rotatably supported on an axle box, and more particularly, an oil reservoir provided in the axle box for lubrication of a double row conical or cylindrical roller bearing. And improvement of the lubrication flow path.

従来、新幹線等の高速鉄道車輌の車軸軸受では、図５に示すように、軸受２に複列円錐ころ軸受を用い、複列円錐ころ軸受の外輪２３支承する軸箱５′の下部に油溜まり５２を形成して、油溜まりの潤滑油に内輪２１、ころ２２、保持器２４を油浴させて、軸受の潤滑を行っている。図５、６に示すように、軸箱５′に設けられた油溜まり５２は、軸受外輪２３が嵌挿される支持穴５１の軸方向両端縁部５１ａ、５１ｂを残して支持穴に開口しており、その断面はＵ字状断面とされている。油溜まりに溜められた液面より低い位置をころが回転通過するようにされ、潤滑油は円錐ころがり軸受外輪中央穴２５や、各部品の隙間を通じて循環する。さらに、前蓋６′側に予備室６８′が形成され、支持穴５１の前蓋側縁部５１ａ及び鍔５０′の下方に切り欠き部５３が形成され、円錐ころに供給された潤滑油は軸受と共に回転循環し、予備室６８′及び前蓋側環状流路部７０、切り欠き部５３を通って油溜まり５２に戻るようにされている（特許文献１）。また、オイルシール７１の背面には断面Ｌ字形の環状の仕切板８′を、内径側が油切り４の小径部４１の外周と微少隙間となるように、軸方向に延在する円筒部分を後蓋７′に内嵌して、潤滑油がオイルシールに直接当たらないようにしている（特許文献１、段落０００７）。   2. Description of the Related Art Conventionally, in an axle bearing of a high-speed railway vehicle such as a Shinkansen, as shown in FIG. 5, a double-row tapered roller bearing is used as the bearing 2, and an oil pool is stored in a lower portion of a shaft box 5 'that supports the outer ring 23 of the double-row tapered roller bearing. The inner ring 21, the rollers 22, and the cage 24 are bathed in lubricating oil in the oil reservoir, and the bearings are lubricated. As shown in FIGS. 5 and 6, the oil sump 52 provided in the axle box 5 ′ opens to the support hole leaving both end edges 51 a and 51 b in the axial direction of the support hole 51 into which the bearing outer ring 23 is inserted. The cross section is a U-shaped cross section. Rollers pass through a position lower than the liquid level stored in the oil reservoir, and lubricating oil circulates through the conical roller bearing outer ring central hole 25 and gaps between the components. Further, a spare chamber 68 'is formed on the front lid 6' side, a notch 53 is formed below the front lid side edge 51a of the support hole 51 and the flange 50 ', and the lubricating oil supplied to the tapered rollers is It rotates and circulates together with the bearing, and returns to the oil reservoir 52 through the spare chamber 68 ′, the front lid side annular flow passage portion 70, and the cutout portion 53 (Patent Document 1). Further, an annular partition plate 8 ′ having an L-shaped cross section is provided on the back surface of the oil seal 71, and a cylindrical portion extending in the axial direction is arranged so that the inner diameter side is slightly spaced from the outer periphery of the small diameter portion 41 of the oil drain 4. It is fitted inside the lid 7 'so that the lubricating oil does not directly hit the oil seal (Patent Document 1, paragraph 0007).

しかしながら、近年のさらなる高速化により潤滑油の温度上昇が無視できないものとなってきている。そこで、特許文献２にあっては、さらに、図５、６に示すように、前蓋側の環状流路部７０に加え、後蓋７′側の軸受押さえ部６２′を長くして、軸受押さえ内径部と、軸受２の端部と、油切り小径部４１と、仕切板８′との間に後蓋側環状流路部５９′を形成し、潤滑経路の容積を大きくしている。   However, due to the recent increase in speed, the temperature rise of the lubricating oil cannot be ignored. Therefore, in Patent Document 2, as shown in FIGS. 5 and 6, in addition to the annular flow passage portion 70 on the front lid side, the bearing pressing portion 62 ′ on the rear lid 7 ′ side is lengthened so that the bearing A rear cover side annular flow passage 59 'is formed between the presser inner diameter portion, the end of the bearing 2, the oil draining small diameter portion 41, and the partition plate 8' to increase the volume of the lubrication path.

さらに、図６に示すように、軸箱５′の油溜まり５２の後蓋側縁部（後蓋インロー部を形成している）５１ｂには、油溜まりと連通する凹形状の第一の流路部（凹部）５６の両側に第二の流路部（凹部）５７′、第三の流路部（凹部）５８′が形成されている。また、図５、７に示すように、後蓋７′軸受押さえ６２′の下部に第一の流路部に対応する、第一の切り欠き部５６″が設けられ、第一の切り欠き部の両側の第二、第三の流路部に対応するに第二及び第三の切り欠き部５７″、５８″が設けられ、油溜まり５２と後蓋側環状流路部５９′とを連通させている。これにより、さらに、潤滑経路の容積を大きくし、潤滑油の循環を容易にしている。   Further, as shown in FIG. 6, the rear cover side edge portion (forming the rear cover inlay portion) 51 b of the oil reservoir 52 of the axle box 5 ′ has a concave first flow that communicates with the oil reservoir. A second flow path part (recessed part) 57 ′ and a third flow path part (recessed part) 58 ′ are formed on both sides of the path part (recessed part) 56. Further, as shown in FIGS. 5 and 7, a first notch 56 ″ corresponding to the first flow path is provided below the rear lid 7 ′ bearing retainer 62 ′, and the first notch The second and third cutout portions 57 ″ and 58 ″ are provided corresponding to the second and third flow passage portions on both sides of the oil reservoir 52, and the oil reservoir 52 and the rear lid side annular flow passage portion 59 ′ are communicated with each other. This further increases the volume of the lubrication path and facilitates circulation of the lubricating oil.

また、特許文献２においては、車軸１は、両端部に軸端３１側からジャーナル３２、ちりよけ座３３、中径軸部３４、輪座３５が順に形成されていて、ジャーナルに嵌合した車軸軸受２を介して軸箱５２′に支承されている。この支承部の機構は、車軸１のジャーナルに外嵌した軸受２の内輪２１を、軸端側に設けられた回り止めリング３７とジャーナルの反軸端側のちりよけ座４の小径部４１の端面４１ａとで狭持し位置決めしている。また、軸箱５２′に内嵌した軸受２の外輪２３の軸端側と反軸端側とを、軸箱の軸端３１側に形成された鍔５０′と軸箱の反軸端側の後蓋７′に形成された軸受押さえ６２′の端面６２ａ′とで狭持固定している。   Further, in Patent Document 2, the axle 1 has a journal 32, a dust guard seat 33, a medium diameter shaft portion 34, and a wheel seat 35 formed in order from the shaft end 31 side at both ends, and fitted to the journal. It is supported on the axle box 52 ′ via the axle bearing 2. The mechanism of this support part is that the inner ring 21 of the bearing 2 that is externally fitted to the journal of the axle 1 is connected to a rotation-preventing ring 37 provided on the shaft end side and a small-diameter portion 41 of the dust-proof seat 4 on the opposite shaft end side of the journal. And end position 41a. Further, the shaft end side and the opposite shaft end side of the outer ring 23 of the bearing 2 fitted inside the shaft box 52 'are connected to the flange 50' formed on the shaft end 31 side of the shaft box and the opposite shaft end side of the shaft box. It is nipped and fixed by an end surface 62a 'of a bearing retainer 62' formed on the rear lid 7 '.

一方、軸受部からの放熱を促進するため、特許文献３においては、印刷用のトリプルレース軸受であるが、中間軌道輪（外輪に相当）の動作用アーム、油カバー（オイルシールに相当）に放射状に放熱フィンを設けている。   On the other hand, in order to promote the heat radiation from the bearing portion, in Patent Document 3, although it is a triple race bearing for printing, an operating arm for an intermediate race (corresponding to an outer ring), an oil cover (corresponding to an oil seal) Radiation fins are provided radially.

特開２００４−１６２８８３号公報JP 2004-162883 A 特許第４０４７８４６号公報Japanese Patent No. 4047846 特許第２９０２３４４号公報Japanese Patent No. 2902344

しかし今後、さらなる高速化に対応するため軸受温度の低減と油の循環をさらによくする必要がある。また、引用文献２においては、図５に示すように、後蓋７′の軸受押さえ部６２′を長くして後蓋側環状流路部５９′の容積を増しているが、予備室６８′及び前蓋側環状流路部７０の容積より依然として少ない。また、図７に示すように、軸受押さえ６２′の下部に切り欠き部５６″、５７″、５８″を形成しているので、後蓋７′の加工が面倒であり、さらに、後蓋の組み付けに当たっては、回転方向の位置決めが必要であるという問題があった。また、軸受押さえ６２′を伸ばし、後蓋側環状流路部５９′を形成しているので、Ｌ字形断面の仕切板８′の嵌合部とオイルシール７１との距離が小さく、オイルシールや仕切板の組み付けに注意を要するという問題があった。また、温度上昇低減のための特許文献３の放熱フィンは、ほとんど回転しないのであるが、新幹線用の高速回転用の軸受では、かかる放射状の放熱フィンは、外部からの異物の衝突により破損するおそれがあるので、設けられていないのが一般であった。   In the future, however, it will be necessary to further reduce bearing temperature and improve oil circulation in order to cope with higher speeds. In Cited Document 2, as shown in FIG. 5, the bearing pressing portion 62 ′ of the rear lid 7 ′ is lengthened to increase the volume of the rear lid-side annular flow passage portion 59 ′. And it is still less than the volume of the front lid side annular flow path portion 70. Further, as shown in FIG. 7, since the notches 56 ″, 57 ″, 58 ″ are formed in the lower part of the bearing holder 62 ′, the processing of the rear lid 7 ′ is troublesome. When assembling, there is a problem that positioning in the rotational direction is necessary, and since the bearing retainer 62 'is extended to form the rear lid side annular flow passage 59', the partition plate 8 having an L-shaped cross section is formed. There is a problem that the distance between the fitting portion of the ′ and the oil seal 71 is small, and care must be taken in assembling the oil seal and the partition plate. However, in a high-speed rotation bearing for Shinkansen, such radial heat dissipating fins are generally not provided because they may be damaged by the collision of foreign matter from the outside.

本発明の課題は、かかる問題点に鑑みて、温度上昇の低減のための種々の対策を施し、さらに、後蓋側環状流路部を拡大し、また、後蓋の加工が容易で組み付けが容易な後蓋を提供し、さらには、軸受装置全体での温度低減対策及び油の循環効率よくし、温度上昇の少ない鉄道車輌用軸受装置を提供することである。   In view of such problems, the object of the present invention is to take various measures for reducing the temperature rise, to further enlarge the rear lid side annular flow path portion, and to easily process the rear lid for assembly. It is an object of the present invention to provide an easy rear cover, and further to provide a railway vehicle bearing device in which temperature reduction measures and oil circulation efficiency in the entire bearing device are improved and the temperature rise is small.

軸箱の支持穴の下部に設けられた油溜まりは、外輪を支持する必要があるので、開口の軸方向両側に縁部を残している。そして、引用文献２の場合のように、後蓋環状流路と油溜まりとを連通する流路部（凹部）や切り欠き部の数を３カ所としているが、かかる外輪を両端縁部で支持できるように、両端縁部の一部（図６の５１ａ，５１ｂ）を残すように形成されている。ところが、本願発明者等は、より詳細に潤滑油の流れ、温度上昇について研究した。その結果、単に切り欠き部や流路部の大きさや数でなく、位置が重要であることを知得した。即ち、切り欠き部や流路部５６、５７′、５８′があるにも拘わらず、図６の二点鎖線で示す油溜まりの開口の切り上げ部（上辺）５２ａ近傍に高温の潤滑油が滞留し、潤滑油の循環による冷却効果が減じられていることを知得した。この高温潤滑油は、軸受外輪に直接触れたまま滞留し、さらに油溜まりから上昇する熱が供給されるので、軸受の冷却を一層減じるものであった。   Since the oil sump provided in the lower part of the support hole of the axle box needs to support the outer ring, the edges are left on both sides in the axial direction of the opening. And as in the case of the cited document 2, the number of the flow passage portions (concave portions) and the cutout portions that communicate the rear lid annular flow passage and the oil reservoir is three, but the outer ring is supported by the edge portions at both ends. In order to be able to do so, it forms so that a part (51a, 51b of FIG. 6) of a both-ends edge part may be left. However, the inventors of the present application studied the flow of lubricating oil and the temperature rise in more detail. As a result, it was found that the position is important, not just the size and number of notches and flow passages. That is, high-temperature lubricating oil stays in the vicinity of the rounded portion (upper side) 52a of the oil sump opening shown by the two-dot chain line in FIG. 6 despite the presence of notches and flow passage portions 56, 57 ', and 58'. It has been found that the cooling effect due to the circulation of the lubricating oil is reduced. This high-temperature lubricating oil stays in direct contact with the outer ring of the bearing and is further supplied with heat rising from the oil reservoir, further reducing the cooling of the bearing.

この知得により、本発明においては、車軸ジャーナル部に嵌合・固定された内輪と、前記内輪と複列のころを介して回転自在に外挿された外輪と、前記外輪をラジアル方向に支持する支持穴を有する軸箱と、前記車軸箱の前記車軸の軸端側に設けられ前記車軸箱を塞ぐようにされた前蓋と、前記車軸箱の反前記軸端側に設けられ前記車軸のちりよけ座及び中径軸部に固定された油切り部と、前記油切り部とオイルシールを介して回転可能にされ前記車軸箱を塞ぐようにされた後蓋と、前記軸箱の下部に設けられ前記支持穴の軸方向両端縁部を残して前記支持穴に開口するＵ字状断面の油溜まりと、を有する鉄道車輌用軸受装置であって、
前記軸箱の前記軸方向両端縁部の少なくともいずれか一側縁部の下部に形成された上部が開口する第一の流路部と、前記第一の流路部の両側であって、前記油溜まりの開口の上辺高さを開口端とする上部が開口する第二及び第三の流路部とが設けられ、、前記潤滑油が少なくとも前記複列円錐ころ軸受内と、前記流路部と、を循環するようにされている鉄道車輌用軸受装置を提供することにより前述した課題を解決した。 Based on this knowledge, in the present invention, the inner ring fitted and fixed to the axle journal part, the outer ring rotatably inserted through the inner ring and double row rollers, and the outer ring are supported in the radial direction. An axle box having a support hole, a front lid provided on an axle end side of the axle box of the axle box and configured to close the axle box, and an axle box provided on an opposite side of the axle box to the axle end side. An oil draining portion fixed to the dust guard and the medium-diameter shaft portion, a rear lid that is rotatable through the oil drainage portion and an oil seal so as to close the axle box, and a lower portion of the axle box An oil sump having a U-shaped cross-section that opens to the support hole while leaving both end edges in the axial direction of the support hole.
A first flow path portion formed at a lower portion of at least one side edge portion of the axial end edges of the axle box, and both sides of the first flow path portion, A second and a third flow passage portion having an upper end opening at the upper side height of the oil sump opening is provided, and the lubricating oil is at least in the double row tapered roller bearing, and the flow passage portion. The above-described problems have been solved by providing a railway vehicle bearing device that is configured to circulate.

即ち、第二、第三の流路部の開口端が油溜まりの開口の上辺高さにされているので、熱により上昇する潤滑油は留まることなく、潤滑油の循環サイクルの中に組み入れられるので、局所的な熱部がなくなり、軸受の冷却効率があがる。   That is, since the opening ends of the second and third flow passage portions are set to the upper side height of the oil reservoir opening, the lubricating oil rising due to heat does not stay and is incorporated in the lubricating oil circulation cycle. As a result, there is no local heat zone and the cooling efficiency of the bearing is increased.

かかる流路部は後蓋側に限らず、前蓋側にも設けることが好ましい。一方、高温の潤滑油はできる限り軸受外輪から離れるようにしたい。ところで、後蓋側はスペースがないが前蓋側は充分な環状流路あるいは予備室等を有する余裕がある。そこで、請求項２に記載の発明においては、前記外輪は、前記軸方向両端縁部の後蓋側に設けられた鍔と、前記前蓋端に設けられた車軸貫通穴を備えた軸受押さえ部と、で狭持固定され、前記軸受押さえ部は、前記車軸貫通穴の外側に前記軸箱と前記前蓋とを仕切る隔壁を形成して前蓋側環状流路部を形成しており、前記軸箱の前記軸方向両端縁部の一側縁部は前蓋側縁部であって、前記隔壁下部に、前記油溜まりと前記前蓋側環状流路部とを連通する前記第一の流路部に対応する切り欠き又は穴からなる第一の連通路と、前記第二及び第三の流路部に対応し、前記外輪より径方向外側に開口する穴からなる第二及び第三の連通路と、を有する鉄道車輌用軸受装置を提供する。   Such a flow path portion is preferably provided not only on the rear lid side but also on the front lid side. On the other hand, it is desirable to keep the hot lubricating oil away from the bearing outer ring as much as possible. By the way, there is no space on the rear lid side, but the front lid side can afford to have a sufficient annular flow path or a spare chamber. Therefore, in the invention according to claim 2, the outer ring includes a bearing provided with a flange provided on the rear lid side of the both end edges in the axial direction and an axle through hole provided in the front lid end. And the bearing holding portion forms a front lid-side annular flow path portion by forming a partition wall that partitions the axle box and the front lid outside the axle through hole, One side edge of the axial both ends of the axle box is a front lid side edge, and the first flow that communicates the oil reservoir and the front lid side annular flow passage to the lower part of the partition wall. A first communication path consisting of a notch or a hole corresponding to the path part, and a second and third corresponding to the second and third flow path parts and consisting of a hole opening radially outward from the outer ring. A railway vehicle bearing device having a communication path is provided.

即ち、外輪を押さえる軸受押さえ部を前蓋側に設けて、軸受押さえ部の下部で軸箱と前蓋側環状流路部とを隔壁で区切り、外輪下部の高温の潤滑油が軸受の他の部分から遠ざかるようにする。一方、油溜まりの潤滑油を前蓋環状流路部と連通させるため、隔壁に連通穴を設けている。連通穴は、前述の第一の流路部に対応する第一の連通路と、第二及び第三の流路部に対応し、外輪より径方向外側に開口する穴からなる第二及び第三の連通路を設ける。第一の連通穴は、外輪最下部近傍にあけられるので、高温潤滑油が貯まることが少ないので、穴の他、Ｖ字状やＵ字状の上部が開口する切り欠きでよい。しかし、第二、第三の連通路は上部を開口させると高温潤滑油がそのまま上昇し、直接外輪の端部、ころ、内輪等に達する。そこで、第二、第三の連通路は外輪外径より外方の穴とし、軸方向の流れを生じさせ、高温潤滑油を迂回させる。   That is, a bearing holding part for holding the outer ring is provided on the front lid side, the shaft box and the front lid side annular flow path part are separated by a partition at the lower part of the bearing holding part, and high-temperature lubricating oil at the lower part of the outer ring Try to keep away from the part. On the other hand, in order to allow the lubricating oil in the oil reservoir to communicate with the front lid annular channel portion, a communication hole is provided in the partition wall. The communication holes correspond to the first communication path corresponding to the first flow path portion described above, and the second and second flow paths corresponding to the second and third flow path portions and including holes opened radially outward from the outer ring. Provide three communication paths. Since the first communication hole is opened in the vicinity of the lowermost part of the outer ring, high temperature lubricating oil is less likely to be stored. Therefore, a V-shaped or U-shaped upper part may be opened in addition to the hole. However, when the upper portions of the second and third communication passages are opened, the high-temperature lubricating oil rises as it is and directly reaches the end of the outer ring, the rollers, the inner ring, and the like. Therefore, the second and third communication passages are formed as holes that are outward from the outer diameter of the outer ring, causing an axial flow to bypass the high-temperature lubricating oil.

一方、後蓋側環状流路部の容積を増加に当たって、請求項３の発明においては、前記軸方向両端縁部の後蓋側縁部及び前記鍔の下部に形成され前記油溜まりに連通する第一の凹形状流路部と、前記第一の凹形状流路部の両側であって、前記油溜まりの開口の上辺高さまでが開口端とされ前記油溜まりに連通する第二及び第三の凹形状流路部が設けられており、少なくとも前記鍔内周面と、前記第一乃至第三の凹形状流路部と、で後部環状流路の外周流路が形成されている鉄道車輌用軸受装置とした。   On the other hand, in increasing the volume of the rear lid-side annular flow passage portion, in the invention of claim 3, a first lid formed on the rear lid-side edge portion of the both axial end edge portions and the lower portion of the flange is communicated with the oil sump. The second and third recesses that are on both sides of the one recessed channel portion and the first recessed channel portion and that are open to the upper side height of the opening of the oil reservoir and communicate with the oil reservoir. For railway vehicles in which a concave channel portion is provided, and an outer peripheral channel of a rear annular channel is formed by at least the inner peripheral surface of the ridge and the first to third concave channel portions. A bearing device was obtained.

即ち、外輪を押さえる軸受押さえ部を前蓋側に設け、後蓋側に鍔を設けることにより、軸受押さえ部等の影響がなく、径方向の容積増加が容易である。さらに、凹形状流路部は上部に開口し、そのまま後部環状流路に連通するので、後蓋側の対応位置に切り欠き部等を設ける必要がない。また、第二、第三の凹形状流路部はその開口端を油溜まりの開口上辺高さとしたので、高熱潤滑油の滞留が少なく、冷却効率があがる。   That is, by providing the bearing pressing portion for pressing the outer ring on the front lid side and the flange on the rear lid side, there is no influence of the bearing pressing portion or the like, and the radial volume can be easily increased. Furthermore, since the concave channel portion opens at the top and communicates with the rear annular channel as it is, it is not necessary to provide a notch or the like at a corresponding position on the rear lid side. Moreover, since the opening end of the second and third concave-shaped channel portions is the height of the upper side of the opening of the oil reservoir, there is little stagnation of the high-temperature lubricating oil, and the cooling efficiency is improved.

さらに、総合的な冷却効果を得るために、請求項４に記載の発明においては、前記後蓋は、アルミニウム材からなり、前記鍔の後蓋側に形成された後蓋インロー部に嵌合する嵌合部と、後端部に設けられた複数の薄板円盤形状の冷却フィンと、を備え、後蓋インロー部の鍔端面と、前記嵌合部の鍔側端面と、の間に、軸後蓋方向凸部を有する仕切部材が狭持固定され、前記オイルシール側への油の流出入を減じ、前記軸後蓋方向凸部先端が前記オイルシールの抜け止めとなるようにされている鉄道車輌用軸受装置とした。   Furthermore, in order to obtain a comprehensive cooling effect, in the invention according to claim 4, the back cover is made of an aluminum material and is fitted to a back cover inlay portion formed on the back cover side of the bag. And a plurality of thin disc-shaped cooling fins provided at the rear end portion, between the flange end surface of the rear lid inlay portion and the flange end surface of the engagement portion. A rail member in which a partition member having a lid-direction convex portion is sandwiched and fixed, reduces oil inflow and outflow to the oil seal side, and the tip of the rear-shaft lid direction convex portion serves to prevent the oil seal from coming off. It was set as the bearing apparatus for vehicles.

即ち、放熱のよいアルミニウム材を用いて後蓋の設けた冷却フィンを薄板円盤状としたので、円盤外周に衝突する飛来物は車軸回転により受け流され、軸方向の侵入は少なく損傷も少ない。また、オイルシールと油きりが摺接して発生する熱が放熱フィンにより冷却され、軸受への熱の伝わりが抑制される。さらに、仕切部材は凸部先端でオイルシールを位置決めしながら鍔と後蓋で狭持させているので、軸方向位置合わせ、芯合わせが容易である。   That is, since the cooling fin provided with the rear lid is made of a thin disk using an aluminum material with good heat dissipation, flying objects that collide with the outer periphery of the disk are swept away by the rotation of the axle, causing little intrusion in the axial direction and little damage. Further, the heat generated by the sliding contact between the oil seal and the oil drill is cooled by the radiation fins, and the transmission of heat to the bearing is suppressed. Furthermore, since the partition member is sandwiched between the collar and the rear lid while positioning the oil seal at the tip of the convex portion, axial alignment and center alignment are easy.

本発明によれば、油溜まりと前蓋又は後蓋への流路の第二、第三の流路部の開口端を油溜まりの開口の上辺高さにし、高温潤滑油の停滞を減じ、高温潤滑油の局所的な熱部をなくし、軸受の冷却高率をあげることができる。これにより、高速回転にあっても軸受の温度上昇の少ない鉄道車輌用軸受装置を提供するものとなった。   According to the present invention, the opening end of the second and third flow path portions of the oil reservoir and the flow path to the front lid or the rear lid is set to the upper side height of the oil reservoir opening to reduce the stagnation of the high temperature lubricating oil, The local hot part of the high-temperature lubricating oil can be eliminated, and the cooling rate of the bearing can be increased. As a result, a railway vehicle bearing device in which the temperature rise of the bearing is small even at high speed rotation is provided.

また、請求項２に記載の発明においては、軸受押さえ部を前蓋側に設けて油溜まりの開口の上辺部での高温潤滑油の滞留を減じる。さらに、軸受押さえ部の下部隔壁に軸箱の流路部と連通する連通穴を設け、第二、第三連通路を外輪外径より外方の穴とし、軸方向の流れを生じさせ、高温潤滑油を迂回させ、軸受への高温潤滑油の影響を小さくできる。これにより、軸受の温度上昇を防止できるものとなった。   In the invention according to claim 2, the bearing pressing portion is provided on the front lid side to reduce the retention of the high temperature lubricating oil at the upper side portion of the oil sump opening. In addition, a communication hole that communicates with the flow path portion of the axle box is provided in the lower partition wall of the bearing retainer, and the second and third communication passages are formed outwardly from the outer diameter of the outer ring. By bypassing the lubricating oil, the influence of the high temperature lubricating oil on the bearing can be reduced. Thereby, the temperature rise of the bearing can be prevented.

さらに、請求項３に記載の発明においては、後蓋側に鍔を設け、軸方向両端縁部の後蓋側縁部及び鍔の下部に油溜まりに連通する凹形状流路部を形成し、第二及び第三の凹形状流路部の開口端を油溜まりの開口の上辺高さとし、高温潤滑油の滞留を減じる。冷却高率鍔内周面と、第一乃至第三の凹形状流路部とで後部環状流路の外周流路とし、容積を増加させるので、冷却効率を向上させた。また、後蓋に切り欠き部等を設ける必要がないので、回転方向の位置合わせが不要で後蓋の組み付け、分解が容易である。   Furthermore, in the invention according to claim 3, a ridge is provided on the rear lid side, a concave-shaped channel portion communicating with the oil sump is formed at the rear lid side edge portion of the both ends in the axial direction and the lower portion of the ridge, The open ends of the second and third concave flow passage portions are set to the height of the upper side of the oil sump opening to reduce the retention of the high temperature lubricating oil. The cooling high-efficiency inner peripheral surface and the first to third concave flow channel portions serve as the outer peripheral flow channel of the rear annular flow channel, and the volume is increased, thereby improving the cooling efficiency. Further, since it is not necessary to provide a notch or the like on the rear lid, alignment in the rotational direction is unnecessary, and the rear lid can be easily assembled and disassembled.

また、請求項４に記載の発明においては、 放熱のよいアルミニウム材の薄板円盤状の冷却フィンとし、飛来物からの損傷を少なくし、オイルシールと油きりとの摺接による熱を冷却できる。また、鍔と後蓋で狭持固定された仕切部材の組立、分解が容易であるので、総合的な冷却効率が向上し、メンテナンスが容易となり、新幹線等の高速鉄道車輌用軸受装置の高速化に貢献するものとなった。   Further, in the invention described in claim 4, it is possible to cool the heat generated by the sliding contact between the oil seal and the oil drill by using a thin disc-shaped cooling fin made of an aluminum material with good heat dissipation, reducing damage from flying objects. In addition, the assembly and disassembly of the partition member that is clamped and fixed between the bag and the rear lid is easy, improving overall cooling efficiency and facilitating maintenance, and increasing the speed of bearing devices for high-speed railway vehicles such as the Shinkansen. Contributed to

本発明の実施の形態について図面を参照して説明する。図１は本発明の実施の形態を示す軸受装置の要部縦断面図（図２のＡ−Ａ線断面）、図２は本発明の実施の形態を示す軸箱の斜視図、図３は前蓋の斜視図、図４は後蓋の斜視図である。図１に示すように、本発明の鉄道車輌用軸受装置１は、内輪２１と複列の円筒ころ２２を介して回転自在に外挿された外輪２３からなる複列円筒ころ軸受２が内輪を鉄道車輌の車軸１のジャーナル部３２に嵌合・固定されている。車軸３には、両端部に軸端部３１から順にジャーナル３２、ちりよけ座３３、中径軸部３４、輪座３５が形成されている。ちりよけ座３３及び中径軸部３４に嵌合固定された油切り部４と車軸の端部ねじ部３６に螺着された回り止めリング３７により複列円筒ころ軸受の内輪２２が狭持固定されている。複列円筒ころ軸受２の外輪２３は軸箱５に軸方向に明けられた支持穴５１に嵌挿され、軸箱にラジアル方向で支持されている。符号２４はころ２２の相対位置を保持するための保持器である。   Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a longitudinal sectional view of a main part of a bearing device showing an embodiment of the present invention (cross section taken along line AA in FIG. 2), FIG. 2 is a perspective view of an axle box showing an embodiment of the present invention, and FIG. FIG. 4 is a perspective view of the rear lid, and FIG. 4 is a perspective view of the rear lid. As shown in FIG. 1, in the railway vehicle bearing device 1 of the present invention, a double-row cylindrical roller bearing 2 comprising an inner ring 21 and an outer ring 23 rotatably inserted via a double-row cylindrical roller 22 has an inner ring. It is fitted and fixed to the journal portion 32 of the axle 1 of the railway vehicle. A journal 32, a dust guard 33, a medium diameter shaft 34, and a wheel seat 35 are formed on the axle 3 in order from the shaft end 31 at both ends. The inner ring 22 of the double-row cylindrical roller bearing is sandwiched between the oil draining portion 4 fitted and fixed to the dust guard 33 and the medium-diameter shaft portion 34, and the non-rotating ring 37 screwed to the end screw portion 36 of the axle. It is fixed. The outer ring 23 of the double row cylindrical roller bearing 2 is inserted into a support hole 51 opened in the axial direction in the axle box 5 and supported in the radial direction by the axle box. Reference numeral 24 denotes a cage for holding the relative position of the roller 22.

軸箱５の車軸１の軸端側に車軸端３１を覆い、軸箱車軸端５ａ側を塞ぐ前蓋６が取り付けられている。また、軸箱５の反軸端側のちりよけ座３３及び中径軸部３４に固定された油切り部４と、油切り部とオイルシール７１を介して回転可能にされ軸箱の反車軸端側を塞ぐ後蓋７が組み付けられている。   A front lid 6 that covers the axle end 31 and closes the axle box axle end 5 a side is attached to the axle end side of the axle 1 of the axle box 5. Further, an oil draining portion 4 fixed to the anti-shaft end 33 on the side opposite to the shaft end of the axle box 5 and the medium-diameter shaft portion 34, and an oil drainage portion and an oil seal 71 are made rotatable to allow the shaft box to be anti-reverse. A rear lid 7 for closing the axle end side is assembled.

図１、２に示すように、軸箱５の下部には支持穴５１の軸方向両端縁部５１ａ、５１ｂを残して支持穴に開口するＵ字状断面の油溜まり５２が設けられている。支持穴５１の後蓋側端縁部５１ｂに隣接して鍔５０が設けられている。また、図３に示すように、前蓋６の軸受側端面に車軸貫通穴６１を備えた軸受押さえ部６２が設けられており、外輪２３が鍔５０と軸受押さえ部とで、位置決め、狭持固定されている。これにより、軸箱５に対し、複列円筒ころ軸受２の内輪２２と外輪２３を介して車軸３を軸方向及びラジアル方向で支持する。   As shown in FIGS. 1 and 2, an oil sump 52 having a U-shaped cross section that opens to the support hole is provided at the lower portion of the axle box 5, leaving both end edges 51 a and 51 b in the axial direction of the support hole 51. A flange 50 is provided adjacent to the rear lid side edge 51 b of the support hole 51. Further, as shown in FIG. 3, a bearing pressing portion 62 having an axle through hole 61 is provided on the bearing side end surface of the front lid 6, and the outer ring 23 is positioned and held between the flange 50 and the bearing pressing portion. It is fixed. Thus, the axle 3 is supported in the axial direction and the radial direction with respect to the axle box 5 via the inner ring 22 and the outer ring 23 of the double row cylindrical roller bearing 2.

図２に示すように、軸箱５の軸方向端縁部の前蓋側端縁部５ａには、下部に形成された上部が開口する第一の流路部５３と、第一の流路部の両側に第二及び第三の流路部５４、５５が設けられ、油溜まり５２に連通している。第二及び第三の流路部の最上部となる開口端５４ａ、５５ａは、二点鎖線で示す油溜まり５２の最上部となる開口５２ａ，５２ａの上辺の高さにされ、開口上辺と連通している。   As shown in FIG. 2, the front lid side edge portion 5 a of the axial edge of the axle box 5 has a first flow channel portion 53 that opens at the top and a first flow channel. Second and third flow path portions 54, 55 are provided on both sides of the portion, and communicate with the oil sump 52. The opening ends 54a and 55a that are the uppermost portions of the second and third flow path portions are set to the height of the upper sides of the openings 52a and 52a that are the uppermost portions of the oil sump 52 indicated by a two-dot chain line, and communicate with the upper sides of the openings. is doing.

図１、３に示すように、前蓋６の軸受押さえ部６２には、車軸貫通穴６１の外側に軸箱５と前蓋６とを仕切る隔壁６３が設けられている。この隔壁６３と車軸端部３１、前蓋外壁６４により、前蓋側環状流路部６８が形成されている。車軸貫通穴６１は、外輪２３の内径以下、内輪２２の外径以上とするのが好ましい。軸箱５の第一の流路部５３に対応する隔壁下部位置に第一の連通路である切り欠き６５が設けられている。また、軸箱の第二及び第三の流路部５４、５５に対応する隔壁下部位置に、第二及び第三の連通路である円弧状の長穴６６、６７が設けられている。これにより、油溜まり５２と前蓋側環状流路部６８が連通する。第二及び第三の連通路６６、６７は外輪２３の外径より外側に開けられているので、外輪下部の高温の潤滑油の流れは軸受２の他の部分から遠ざかるようになる。   As shown in FIGS. 1 and 3, the bearing pressing portion 62 of the front lid 6 is provided with a partition wall 63 that partitions the axle box 5 and the front lid 6 outside the axle through hole 61. The partition wall 63, the axle end portion 31, and the front lid outer wall 64 form a front lid-side annular flow path portion 68. The axle through hole 61 is preferably not more than the inner diameter of the outer ring 23 and not less than the outer diameter of the inner ring 22. A notch 65 serving as a first communication path is provided at a lower position of the partition wall corresponding to the first flow path portion 53 of the axle box 5. In addition, arc-shaped elongated holes 66 and 67 which are second and third communication passages are provided at lower positions of the partition walls corresponding to the second and third flow path portions 54 and 55 of the axle box. As a result, the oil reservoir 52 and the front lid-side annular flow path portion 68 communicate with each other. Since the second and third communication passages 66 and 67 are opened outside the outer diameter of the outer ring 23, the flow of high-temperature lubricating oil at the lower part of the outer ring is away from the other parts of the bearing 2.

一方、図１、２に示すように、後蓋側縁部５１ｂ及び鍔５０の下部に油溜まり５２に連通し上部が開口する第一の凹形状流路部５６が形成されている。第一の凹形状流路部５６の両側に第二及び第三の凹形状流路部５７、５８が設けられ、油溜まり５２に連通している。第二及び第三の凹形状流路部の最上部となる開口端５７ａ，５８ａは、二点鎖線で示す油溜まりの開口の上辺５２ａの高さにされ、開口上辺と連通している。図１、４に示すように、後蓋７は軸箱５に設けられた鍔端面５０ａに当接して取り付けられるので、鍔５０ｂ内周面と、第一乃至第三の凹形状流路部５６、５７、５８とで後蓋側環状流路５９の外周流路が形成される。これにより、油溜まり５２開口の最上部５２ａの高温潤滑油が循環するようになる。なお、前蓋側の流路部５３、５４、５５及び後蓋側の凹形状流路部５６、５７、５８は３カ所設けているが、これは、流路間、凹形状流路部間で外輪２３を軸方向端縁部で支持するためであり、流路間、凹形状流路部間５１ａ、５１ｂの形状は支持穴５１の内径と同一径にされている。   On the other hand, as shown in FIGS. 1 and 2, a first concave channel portion 56 that communicates with the oil sump 52 and opens at the top is formed in the lower portion of the rear lid side edge portion 51 b and the flange 50. Second and third concave channel portions 57 and 58 are provided on both sides of the first concave channel portion 56 and communicate with the oil reservoir 52. The opening ends 57a and 58a that are the uppermost portions of the second and third concave flow channel portions are at the height of the upper side 52a of the oil sump opening indicated by the two-dot chain line, and communicate with the upper side of the opening. As shown in FIGS. 1 and 4, the rear lid 7 is attached in contact with the flange end surface 50 a provided in the axle box 5, so that the inner peripheral surface of the flange 50 b and the first to third concave-shaped flow channel portions 56 are provided. , 57 and 58 form an outer peripheral channel of the rear lid side annular channel 59. Thereby, the high temperature lubricating oil of the uppermost part 52a of the oil reservoir 52 opening comes to circulate. The front lid side flow passage portions 53, 54, and 55 and the rear lid side concave flow passage portions 56, 57, and 58 are provided at three locations. This is because the outer ring 23 is supported by the edge portion in the axial direction, and the shapes of the flow passages and the concave flow passage portions 51 a and 51 b are the same as the inner diameter of the support hole 51.

車軸１の軸座３５と内輪２２間に狭持される油切り４は、軸受側より内輪押さえ部の小径部４１、オイルシール摺接部４２、ラビリンス溝４３が順次形成されている。また、軸箱５の鍔５０の後蓋側に後蓋インロー部５０ｃが設けられている。後蓋７はアルミニウム材であって、車軸３が貫通する中空穴７０を備え、後蓋インロー部５０ｃに嵌合する嵌合部７２、オイルシール取付部７３、ラビリンス溝７４、薄板円盤形状の冷却フィン７５が順次形成されている。オイルシール取付部７３に装着されたオイルシール７１のリップが油切りのオイルシール摺接部４２に摺接し、後蓋ラビリンス溝７４と油切りのラビリンス溝４３とでラビリンスシールを形成するように組み立てられる。後蓋インロー部５０ｃ側の鍔端面５０ａと嵌合部７２の鍔側端面７２ａとの間に、軸後蓋方向凸部を有するアルミニウム材からなる仕切部材８が狭持固定されている。仕切部材８の内周部８２は油切りの小径部４１と微少隙間を形成し、オイルシール側への潤滑油の流出入を減じている。また、軸後蓋方向凸部先端８１はオイルシール７１の端面と接触又は微少隙間を形成し、オイルシールの抜け止め、位置決めが行えるようにされている。   The oil drainer 4 sandwiched between the shaft seat 35 of the axle 1 and the inner ring 22 is formed with a small-diameter portion 41 of an inner ring pressing portion, an oil seal sliding contact portion 42, and a labyrinth groove 43 sequentially from the bearing side. Further, a rear lid inlay portion 50 c is provided on the rear lid side of the flange 50 of the axle box 5. The rear lid 7 is made of an aluminum material and has a hollow hole 70 through which the axle 3 passes, and is fitted with a fitting portion 72, an oil seal attachment portion 73, a labyrinth groove 74, and a thin disc-shaped cooling member that fits into the rear lid inlay portion 50c. Fins 75 are sequentially formed. The lip of the oil seal 71 attached to the oil seal mounting portion 73 is in sliding contact with the oil seal sliding contact portion 42, and the rear lid labyrinth groove 74 and the oil drain labyrinth groove 43 form a labyrinth seal. It is done. A partition member 8 made of an aluminum material having an axial rear cover direction convex portion is sandwiched and fixed between the flange end surface 50a on the rear lid inlay portion 50c side and the flange side end surface 72a of the fitting portion 72. The inner peripheral portion 82 of the partition member 8 forms a minute gap with the small-diameter portion 41 for oil removal, and reduces the inflow and outflow of lubricating oil to the oil seal side. Further, the tip 81 of the rear-shaft cover direction convex portion is in contact with the end face of the oil seal 71 or forms a minute gap so that the oil seal can be prevented from being detached and positioned.

このように、本発明の実施の形態によれば、油溜まり５２の潤滑油は外輪中央穴２５を通って、軸受２、前蓋側環状流通路６８、第一乃至第三連通路６５、６６、６７、流路部５３、５４、５５を通って、油溜まり部に戻る前側循環路を構成する。さらに、外輪中央穴２５を通って、軸受２、後蓋側環状流通路５９、凹形状流路部５６、５７、５８を通って、油溜まり部５２に戻る後蓋側循環サイクルを構成し、軸受の潤滑と温度上昇を防止する。また、図２の二点鎖線で示す、油溜まりの両脇の上辺部５２ａ、５２ａの高温潤滑油は第二、第三の流路部５４、５５又は凹形状流路部５７、５８の開口端５４ａ、５５ａ、５７ａ、５８ａを通じて、循環経路に組み込まれるので、高温潤滑油の滞留がなくなり、軸受の温度上昇を減じることができる。   As described above, according to the embodiment of the present invention, the lubricating oil in the oil sump 52 passes through the outer ring central hole 25 and passes through the bearing 2, the front lid side annular flow passage 68, and the first to third communication passages 65 and 66. , 67 and the flow path parts 53, 54, and 55 to form a front circulation path that returns to the oil reservoir. Further, a rear cover-side circulation cycle is formed that passes through the outer ring central hole 25, passes through the bearing 2, the rear cover-side annular flow passage 59, the concave flow passage portions 56, 57, 58, and returns to the oil reservoir portion 52. Prevent bearing lubrication and temperature rise. Moreover, the high temperature lubricating oil of the upper side parts 52a and 52a on both sides of the oil sump shown by the two-dot chain line in FIG. 2 is the opening of the second and third flow path parts 54 and 55 or the concave flow path parts 57 and 58. Since it is incorporated into the circulation path through the ends 54a, 55a, 57a, 58a, the high temperature lubricating oil is not retained, and the temperature rise of the bearing can be reduced.

また、軸受押さえを６２前蓋側にして、後蓋側に外輪２３を狭持するための鍔５０を設けたので、従来の予備室６８′を含めて、前蓋側環状流路部６８の容量を大きく損なうことなく、後蓋側環状流路５９の容積を確保した。さらに、前蓋側に隔壁６３を設けて、潤滑油が第二、第三の穴状の連通路６６、６７を通るようにして、外輪２３との接触を少なくして循環経路に組み込んでいるので、高温潤滑油による軸受の温度上昇を減じている。   Also, since the bearing retainer is 62 on the front lid side and the flange 50 is provided on the rear lid side to hold the outer ring 23, the front lid side annular flow path portion 68 including the conventional spare chamber 68 'is provided. The volume of the rear lid side annular flow path 59 was ensured without greatly impairing the capacity. Further, a partition wall 63 is provided on the front lid side so that the lubricating oil passes through the second and third hole-shaped communication passages 66 and 67 and is incorporated into the circulation path with less contact with the outer ring 23. Therefore, the temperature rise of the bearing due to the high temperature lubricating oil is reduced.

また、薄板円盤状冷却フィン７５はオイルシール７１の取り付けられる後蓋側にを設けたので、外部からの損傷を受けにくい。また、薄板円盤状冷却フィンにより、オイルシールの劣化を防止し、オイルシール摺接部からの発熱を効率よく放熱し、軸受側への温度上昇を押さえることができる。   Further, since the thin disc-shaped cooling fin 75 is provided on the rear lid side to which the oil seal 71 is attached, it is not easily damaged from the outside. Further, the thin disk-like cooling fins can prevent the deterioration of the oil seal, efficiently dissipate heat generated from the oil seal sliding contact portion, and suppress the temperature rise to the bearing side.

なお、本発明の実施の形態においては、円筒転がり軸受について述べたが、円錐ころがり軸受の場合も同様であることは言うまでもない。   In the embodiment of the present invention, the cylindrical rolling bearing has been described. However, it goes without saying that the same applies to a tapered roller bearing.

本発明の実施の形態を示す軸受装置の要部縦断面図（図２のＡ−Ａ線断面）である。It is a principal part longitudinal cross-sectional view (AA sectional view of FIG. 2) of the bearing apparatus which shows embodiment of this invention. 本発明の実施の形態を示す軸受装置の軸箱の斜視図である。It is a perspective view of the axle box of the bearing device showing an embodiment of the invention. 本発明の実施の形態を示す軸受装置の前蓋の斜視図である。It is a perspective view of a front lid of a bearing device showing an embodiment of the invention. 本発明の実施の形態を示す軸受装置の後蓋の斜視図である。It is a perspective view of the back cover of a bearing device showing an embodiment of the invention. 従来の軸受装置の要部縦断面図（図６のＢ−Ｂ線断面）である。It is a principal part longitudinal cross-sectional view (BB sectional view of FIG. 6) of the conventional bearing apparatus. 従来の軸受装置の軸箱の正面図である。It is a front view of the axle box of the conventional bearing device. 従来の軸受装置の後蓋の正面図である。It is a front view of the rear cover of the conventional bearing device.

符号の説明Explanation of symbols

１ 鉄道車輌用軸受装置
２ 複列ころ軸受
３ 車軸
４ 油切り部
５ 軸箱
６ 前蓋
７ 後蓋
８ 仕切部材
２１ 内輪
２２ ころ
２３ 外輪
３２ ジャーナル部
３３ ちりよけ座
３４ 中径軸部
５０ 鍔
５０ａ 鍔端面
５０ｂ 鍔内周面
５０ｃ 後蓋インロー部
５１ 支持穴
５１ａ、５１ｂ 軸方向両端縁部
５２ 油溜まり
５２ａ 油溜まりの開口の上辺
５３、５６ 第一の流路部
５４ 第二の流路部
５４ａ、５５ａ、５７ａ、５８ａ 開口端
５５ 第三の流路部
５６ 第一の凹形状流路部
５７ 第二の凹形状流路部
５８ 第三の凹形状流路部
５９ 後部環状流路
６１ 車軸貫通穴
６２ 軸受押さえ部
６３ 隔壁
６５ 第一の連通路
６６ 第二の連通路
６７ 第三の連通路
６８ 前蓋側環状流路部
７１ オイルシール
７２ 嵌合部
７２ａ 嵌合部の鍔側端面
７５ 薄板円盤形状の冷却フィン
８１ 後蓋方向凸部先端

DESCRIPTION OF SYMBOLS 1 Railway vehicle bearing apparatus 2 Double row roller bearing 3 Axle 4 Oil drain part 5 Shaft box 6 Front lid 7 Rear lid 8 Partition member 21 Inner ring 22 Roller 23 Outer ring 32 Journal part 33 Dust guard 34 Medium diameter shaft part 50 50a 鍔 End surface 50b 周 Inner peripheral surface 50c Rear lid inlay portion 51 Support hole 51a, 51b Axial both ends edge 52 Oil sump 52a Upper side 53, 56 of the oil sump opening First flow passage portion 54 Second flow passage portion 54a, 55a, 57a, 58a Open end 55 Third flow channel portion 56 First concave flow channel portion 57 Second concave flow channel portion 58 Third concave flow channel portion 59 Rear annular flow channel 61 Axle Through hole 62 Bearing holding part 63 Bulkhead 65 First communication path 66 Second communication path 67 Third communication path 68 Front cover side annular flow path part 71 Oil seal 72 Fitting part 72a Fitting side end face 75 Thin disk type Lid direction projection end After cooling fins 81

Claims (4)

車軸ジャーナル部に嵌合・固定された内輪と、前記内輪と複列のころを介して回転自在に外挿された外輪と、前記外輪をラジアル方向に支持する支持穴を有する軸箱と、前記車軸箱の前記車軸の軸端側に設けられ前記車軸箱を塞ぐようにされた前蓋と、前記車軸箱の反前記軸端側に設けられ前記車軸のちりよけ座及び中径軸部に固定された油切り部と、前記油切り部とオイルシールを介して回転可能にされ前記車軸箱を塞ぐようにされた後蓋と、前記軸箱の下部に設けられ前記支持穴の軸方向両端縁部を残して前記支持穴に開口するＵ字状断面の油溜まりと、を有する鉄道車輌用軸受装置であって、
前記軸箱の前記軸方向両端縁部の少なくともいずれか一側縁部の下部に形成された上部が開口する第一の流路部と、前記第一の流路部の両側であって、前記油溜まりの開口の上辺高さを開口端とする上部が開口する第二及び第三の流路部とが設けられ、、前記潤滑油が少なくとも前記複列ころ軸受内と、前記流路部と、を循環するようにされていることを特徴とする鉄道車輌用軸受装置。 An inner ring fitted and fixed to the axle journal part, an outer ring rotatably inserted through the inner ring and a double-row roller, an axle box having a support hole for supporting the outer ring in a radial direction; A front cover provided on the axle end side of the axle box of the axle box so as to close the axle box, and a dust cover and an intermediate diameter shaft portion provided on the opposite side of the axle box of the axle box. A fixed oil drainer, a rear lid that is rotatable through the oil drainer and an oil seal so as to close the axle box, and both axial ends of the support hole provided at the lower part of the axle box A railway vehicle bearing device having a U-shaped oil sump that opens into the support hole leaving an edge,
A first flow path portion formed at a lower portion of at least one side edge portion of the axial end edges of the axle box, and both sides of the first flow path portion, Second and third flow path portions having upper ends that are open at the upper side height of the oil sump opening are provided, and the lubricating oil is at least in the double row roller bearing, and the flow path portion. A bearing device for a railway vehicle characterized by being circulated. 前記外輪は、前記軸方向両端縁部の後蓋側に設けられた鍔と、前記前蓋端に設けられた車軸貫通穴を備えた軸受押さえ部と、で狭持固定され、前記軸受押さえ部は、前記車軸貫通穴の外側に前記軸箱と前記前蓋とを仕切る隔壁を形成して前蓋側環状流路部を形成しており、
前記軸箱の前記軸方向両端縁部の一側縁部は前蓋側縁部であって、前記隔壁下部に、前記油溜まりと前記前蓋側環状流路部とを連通する前記第一の流路部に対応する切り欠き又は穴からなる第一の連通路と、前記第二及び第三の流路部に対応し、前記外輪より径方向外側に開口する穴からなる第二及び第三の連通路と、を有することを特徴とする請求項１記載の鉄道車輌用軸受装置。 The outer ring is nipped and fixed by a flange provided on the rear lid side of the both end edges in the axial direction and a bearing pressing portion having an axle through hole provided in the front lid end, and the bearing pressing portion Is formed with a partition wall that partitions the axle box and the front lid outside the axle through hole to form a front lid side annular flow path portion,
One side edge of the axial direction both ends of the axle box is a front lid side edge, and the first reservoir that communicates the oil reservoir and the front lid side annular channel with the partition wall lower part. A first communication path consisting of a notch or a hole corresponding to the flow path part, and a second and third corresponding to the second and third flow path parts and consisting of a hole opening radially outward from the outer ring. The railway vehicle bearing device according to claim 1, further comprising: a communication passage. 前記軸方向両端縁部の後蓋側縁部及び前記鍔の下部に形成され前記油溜まりに連通する第一の凹形状流路部と、前記第一の凹形状流路部の両側であって、前記油溜まりの開口の上辺高さまでが開口端とされ前記油溜まりに連通する第二及び第三の凹形状流路部が設けられており、少なくとも前記鍔内周面と、前記第一乃至第三の凹形状流路部と、で後部環状流路の外周流路が形成されていることを特徴とする請求項２記載の鉄道車輌用軸受装置。   A first concave channel portion formed at a rear lid side edge portion of the both end edges in the axial direction and a lower portion of the flange and communicating with the oil sump; and both sides of the first concave channel portion; The second and third concave flow passage portions that are open to the height of the upper side of the opening of the oil reservoir and communicate with the oil reservoir are provided, and at least the inner peripheral surface of the ridge, the first to The railway vehicle bearing device according to claim 2, wherein an outer peripheral flow path of a rear annular flow path is formed by the third concave flow path portion. 前記後蓋は、アルミニウム材からなり、前記鍔の後蓋側に形成された後蓋インロー部に嵌合する嵌合部と、後端部に設けられた複数の薄板円盤形状の冷却フィンと、を備え、後蓋インロー部の鍔端面と、前記嵌合部の鍔側端面と、の間に、軸後蓋方向凸部を有する仕切部材が狭持固定され、前記オイルシール側への油の流出入を減じ、前記軸後蓋方向凸部先端が前記オイルシールの抜け止めとなるようにされていることを特徴とする請求項２又は３記載の鉄道車輌用軸受装置。   The rear lid is made of an aluminum material, a fitting portion that fits into a rear lid inlay portion formed on the rear lid side of the bag, and a plurality of thin disk-shaped cooling fins provided at the rear end portion, A partition member having a shaft rear cover direction convex portion is sandwiched and fixed between the flange end surface of the rear lid inlay portion and the flange end surface of the fitting portion, and the oil to the oil seal side is sandwiched and fixed. The railcar bearing device according to claim 2 or 3, wherein the inflow / outflow is reduced, and the tip of the convex portion in the rear-shaft direction of the shaft is configured to prevent the oil seal from coming off.
JP2008271654A 2008-10-22 2008-10-22 Railway vehicle bearing device Active JP5182756B2 (en)

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JP2016026947A (en) * 2014-06-26 2016-02-18 日本車輌製造株式会社 Railroad vehicle truck with journal box structure
JP2017155755A (en) * 2016-02-29 2017-09-07 三菱日立パワーシステムズ株式会社 Journal bearing and rotary machine

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Cited By (9)

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Publication number Priority date Publication date Assignee Title
WO2011136117A1 (en) 2010-04-26 2011-11-03 株式会社フジクラ Oxide superconducting conductor and production method therefor
JP2016026947A (en) * 2014-06-26 2016-02-18 日本車輌製造株式会社 Railroad vehicle truck with journal box structure
JP2017155755A (en) * 2016-02-29 2017-09-07 三菱日立パワーシステムズ株式会社 Journal bearing and rotary machine
WO2017150496A1 (en) * 2016-02-29 2017-09-08 三菱日立パワーシステムズ株式会社 Journal bearing and rotary machine
KR20180101594A (en) * 2016-02-29 2018-09-12 미츠비시 히타치 파워 시스템즈 가부시키가이샤 Journal Bearing & Rotating Machinery
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CN108700111B (en) * 2016-02-29 2020-03-24 三菱日立电力***株式会社 Journal bearing and rotary machine

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