JP5274931B2 - Double row roller bearing - Google Patents
Double row roller bearing Download PDFInfo
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- JP5274931B2 JP5274931B2 JP2008207808A JP2008207808A JP5274931B2 JP 5274931 B2 JP5274931 B2 JP 5274931B2 JP 2008207808 A JP2008207808 A JP 2008207808A JP 2008207808 A JP2008207808 A JP 2008207808A JP 5274931 B2 JP5274931 B2 JP 5274931B2
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- roller bearing
- outer ring
- double row
- cage
- ring
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C19/00—Bearings with rolling contact, for exclusively rotary movement
- F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
- F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
- F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/58—Raceways; Race rings
- F16C33/60—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings
- F16C33/605—Raceways; Race rings divided or split, e.g. comprising two juxtaposed rings with a separate retaining member, e.g. flange, shoulder, guide ring, secured to a race ring, adjacent to the race surface, so as to abut the end of the rolling elements, e.g. rollers, or the cage
Description
本発明は、複列ころ軸受に関するもので、特に鉄道車両車軸軸受や各種産業機械用として利用される複列ころ軸受に関する。 The present invention relates to a double row roller bearing, and more particularly to a double row roller bearing used for a railway vehicle axle bearing or various industrial machines.
鉄道車両に使用される車軸軸受では、軸箱の省スペース化、メンテナンスの簡略化としてのグリース密封化が主流となっており、また、車両の乗り心地向上から円筒ころ軸受に替えて円すいころ軸受が使用される場合が増えている（特許文献１）。特許文献１のものは、複列の円すいころ軸受の両端面にシールケースを付設し、シールケースに収容したシールにより内部が密封されるものである。 The mainstream of axle bearings used in railway vehicles is the space saving of the axle box and the sealing of grease as a simplified maintenance. Tapered roller bearings are used instead of cylindrical roller bearings to improve the riding comfort of vehicles. Is increasingly used (Patent Document 1). In Patent Document 1, a seal case is attached to both end faces of a double row tapered roller bearing, and the inside is sealed by a seal accommodated in the seal case.
ところで、円すいころ軸受は、従来用いられていた円筒ころ軸受とは違い内輪が分離している。このため、一対の内輪は、対向する互いの端部を突き合わせた密着状態で使用され、これら内輪の内径面に車軸が嵌合している。各内輪の小鍔側の内径面には、小鍔側端面に向かって拡径する小鍔面取りが形成されており、この小鍔面取りが車軸への軸受挿入時の案内面とされている。これにより、内輪の内径面は、内径が一定で車軸が緊密嵌合する円筒状のはめあい部と、小鍔面取りとを具備した構造になっている。 By the way, the tapered roller bearing has an inner ring separated from a conventionally used cylindrical roller bearing. For this reason, the pair of inner rings are used in a close contact state in which the opposite end portions face each other, and the axles are fitted to the inner diameter surfaces of these inner rings. The inner surface of the inner ring of each inner ring is formed with a chamfer chamfer that increases in diameter toward the end surface of the gutter side, and this chamfer chamfer serves as a guide surface when the bearing is inserted into the axle. Thereby, the inner diameter surface of the inner ring has a structure having a cylindrical fitting portion in which the inner diameter is constant and the axle is closely fitted, and a small chamfer chamfer.
前記のような内輪構造を有する円すいころ軸受を使用する場合、内輪内径面のはめあい部と小鍔面取りとの繋ぎ部近傍で、車軸のベンディングに起因してスタンプ疵が発生することがある。そこで、スタンプ疵の発生を回避するための方法が提案されている。例えば、小鍔面取りの丸め形状加工や、内輪又は車軸のスタンプ疵発生部位の硬化、軟質剤によるコーティング、潤滑剤の付与によりスタンプ疵発生の対策を行っている。
前記のような対策を行ったものは、未対策のものと比較するとスタンプ疵の発生を減少させることができる。しかしながら、スタンプ疵の発生源は、内輪分割構造による小鍔面取りとはめあい部との繋ぎ部を有することにある。このため、小鍔面取りを有さず、これによる繋ぎ部が存在しない従来型の円筒ころ軸受のように、スタンプ疵の発生を完全に防止することは困難であった。 When the above countermeasures are taken, it is possible to reduce the occurrence of stamp flaws as compared with those that have not been taken. However, the generation source of the stamp wrinkles lies in having a connecting portion between the chamfer chamfering and the fitting portion by the inner ring dividing structure. For this reason, it has been difficult to completely prevent the occurrence of stamp wrinkles as in conventional cylindrical roller bearings that do not have chamfer chamfering and thus do not have a connecting portion.
本発明は、上記課題に鑑みて、車両の良好な乗り心地を維持しながら、スタンプ疵の発生を防止することができる複列ころ軸受を提供する。 In view of the above-described problems, the present invention provides a double row roller bearing that can prevent the occurrence of stamp wrinkles while maintaining good riding comfort of the vehicle.
本発明の複列ころ軸受は、２列のみの軌道を有する内輪と、内輪の外周側に配置され、前記軌道に対向する軌道を有する外輪と、前記内輪および前記外輪間に配置されるそれぞれが１列のみの第１・第２転動体と、第１転動体を保持する第１保持器と、第２転動体を保持する第２保持器とを備えた鉄道車両の車軸支持用の複列ころ軸受において、第１転動体が円筒ころにて構成される円筒ころ軸受部と、第２転動体が円すいころにて構成される円すいころ軸受部とを備え、前記内輪を、円筒ころ軸受部と円すいころ軸受部とを包括する一体構造とし、前記外輪を反円すいころ軸受部側から組み込むことによって組み立て可能であると共に、前記外輪を反円すいころ軸受部側から分離することによって分割可能であるものである。 The double-row roller bearing of the present invention includes an inner ring having only two rows of raceways, an outer race having a raceway disposed on the outer peripheral side of the inner race and facing the raceway, and each of the inner race and the outer race being arranged between the inner race and the outer race. A double row for supporting an axle of a railway vehicle, comprising only one row of first and second rolling elements, a first holder for holding the first rolling element, and a second holder for holding the second rolling element. The roller bearing includes a cylindrical roller bearing portion in which the first rolling element is constituted by a cylindrical roller and a tapered roller bearing portion in which the second rolling element is constituted by a tapered roller, and the inner ring is provided with the cylindrical roller bearing portion. And the tapered roller bearing part, and can be assembled by incorporating the outer ring from the anti-taper roller bearing part side, and can be divided by separating the outer ring from the anti-taper roller bearing part side. Is.
本発明の複列ころ軸受によれば、円筒ころ軸受部と円すいころ軸受部とを備え、内輪を円筒ころ軸受部と円すいころ軸受部とを包含する一体構造とすることができる。従来では、複列円すいころ軸受は内輪が分割されているため、内輪内径面に、車軸へ軸受を挿入する際に案内面となる小鍔面取りと、はめあい部との間に繋ぎ部を有することになり、この繋ぎ部がスタンプ疵の発生源となる。これに対し、本発明では内輪を一体構造とすることにより、このような繋ぎ部を省略することができる。 According to the double row roller bearing of the present invention, a cylindrical roller bearing portion and a tapered roller bearing portion can be provided, and the inner ring can have an integrated structure including the cylindrical roller bearing portion and the tapered roller bearing portion. Conventionally, since the inner ring of a double row tapered roller bearing is divided, the inner ring inner diameter surface has a connecting portion between a small chamfer chamfer serving as a guide surface when the bearing is inserted into the axle and the fitting portion. This connecting part becomes the source of stamping. On the other hand, in this invention, such a connection part can be abbreviate | omitted by making an inner ring into an integral structure.
前記外輪は、前記内輪に対向する２列のみの軌道を有するものとすることができる。この場合、外輪の内径面の軸方向中央部に内径方向に突出する鍔部を設けるとともに、第１転動体側の外輪端部に円筒ころの軸方向外端部を受ける鍔輪を付設し、第１保持器を外輪案内保持器とすることができる。このような構成とすることにより、外輪と第１保持器との軸方向位置を固定して、円筒ころを第１保持器の内径側から配設することができ、外輪、第１保持器、及び円筒ころからなる外輪組立品を構成することができる。そして、複列ころ軸受の組立時においては、内輪に第２保持器及び円すいころを配設して、外輪組立品を反円すいころ軸受部側から内輪に組み込む。このように、外輪構成品と内輪とを分離することができて、分割生産・組立・管理が可能となり、生産性の向上を図ることができる。 The outer ring may have only two rows of tracks facing the inner ring. In this case, a flange that protrudes in the inner diameter direction is provided at the axial central portion of the inner diameter surface of the outer ring, and a flange that receives the outer end in the axial direction of the cylindrical roller is attached to the outer ring end on the first rolling element side, The first cage can be an outer ring guide cage. With such a configuration, the axial positions of the outer ring and the first cage can be fixed, and the cylindrical roller can be disposed from the inner diameter side of the first cage. The outer ring, the first cage, And an outer ring assembly composed of cylindrical rollers. When the double row roller bearing is assembled, the second cage and the tapered roller are disposed in the inner ring, and the outer ring assembly is assembled into the inner ring from the side opposite the tapered roller bearing. In this way, the outer ring component and the inner ring can be separated, and split production, assembly, and management are possible, and productivity can be improved.
前記外輪は、円筒ころ軸受部に使用される第１外輪と、円すいころ軸受部に使用される第２外輪とから構成することができる。これにより、分割化された外輪部で損傷が発生した場合に、この外輪部のみの交換をすればよく、軸受全体を交換する必要がなくなる。この場合、第１保持器を外輪案内保持器とすると、外輪構成品と内輪とを分離することができて、分割生産・組立・管理が可能となり、生産性の向上を図ることができる。 The said outer ring | wheel can be comprised from the 1st outer ring | wheel used for a cylindrical roller bearing part, and the 2nd outer ring | wheel used for a tapered roller bearing part. Thereby, when damage occurs in the divided outer ring portion, it is only necessary to replace this outer ring portion, and there is no need to replace the entire bearing. In this case, when the first retainer is an outer ring guide retainer, the outer ring component and the inner ring can be separated, and divided production, assembly, and management are possible, and productivity can be improved.
外輪の両端部又は一方の端部に軸方向端部を密封するシール構造を備えることにより、メンテナンスの簡略化等を図ることができる。 By providing a seal structure that seals the axial end at both ends or one end of the outer ring, maintenance can be simplified.
以上より、本発明の複列ころ軸受によれば、円すいころ軸受構造による車両の良好な乗り心地を維持しながら、スタンプ疵の発生を防止することができる。 As described above, according to the double row roller bearing of the present invention, it is possible to prevent the occurrence of stamp wrinkles while maintaining good riding comfort of the vehicle by the tapered roller bearing structure.
以下本発明の実施の形態を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図１に、本発明の第１実施形態の複列ころ軸受を、鉄道車両車軸用軸受に適用した実施の形態を示す。この複列ころ軸受は、軸（車軸）１の端部に配置したものであり、円筒ころ軸受部３０と円すいころ軸受部３１とから構成されている。複列ころ軸受は、外周面に複列の第１軌道面６ａ及び第２軌道面６ｂを有し、車軸１とはまり合う単一の内輪２と、内周面に複列の第１軌道面７ａ及び第２軌道面７ｂを有する単一の外輪３と、内輪２の第１軌道面６ａと外輪３の第１軌道面７ａとの間に転動自在に介在する複数の円筒ころ４ａと、内輪２の第２軌道面６ｂと外輪３の第２軌道面７ｂとの間に転動自在に介在する複数の円すいころ４ｂを備える。内輪２の第１軌道面６ａと外輪３の第１軌道面７ａとの間には、円筒ころ４ａを軸受周方向に所定の間隔を隔てて保持する第１保持器５ａが介在し、内輪２の第２軌道面６ｂと外輪３の第２軌道面７ｂとの間には、円すいころ４ｂを軸受周方向に所定の間隔を隔てて保持する保持器５ｂが介在している。内輪２の第１軌道面６ａと外輪３の第１軌道面７ａは円筒状の軌道面を有し、内輪２の第２軌道面６ｂと外輪３の第２軌道面７ｂは円すい状の軌道面を有している。 FIG. 1 shows an embodiment in which the double row roller bearing of the first embodiment of the present invention is applied to a railway vehicle axle bearing. This double row roller bearing is disposed at the end of a shaft (axle) 1 and is composed of a cylindrical roller bearing portion 30 and a tapered roller bearing portion 31. The double row roller bearing has a double row first raceway surface 6a and a second raceway surface 6b on the outer peripheral surface, a single inner ring 2 that fits with the axle 1, and a double row first raceway surface on the inner peripheral surface. A single outer ring 3 having 7a and a second raceway surface 7b, and a plurality of cylindrical rollers 4a interposed between the first raceway surface 6a of the inner ring 2 and the first raceway surface 7a of the outer ring 3 in a freely rolling manner, A plurality of tapered rollers 4b are provided between the second raceway surface 6b of the inner ring 2 and the second raceway surface 7b of the outer ring 3 so as to freely roll. Between the first raceway surface 6a of the inner ring 2 and the first raceway surface 7a of the outer ring 3, a first cage 5a that holds the cylindrical rollers 4a at a predetermined interval in the bearing circumferential direction is interposed. A cage 5b is disposed between the second raceway surface 6b and the second raceway surface 7b of the outer ring 3 to hold the tapered rollers 4b at a predetermined interval in the bearing circumferential direction. The first raceway surface 6a of the inner ring 2 and the first raceway surface 7a of the outer ring 3 have a cylindrical raceway surface, and the second raceway surface 6b of the inner ring 2 and the second raceway surface 7b of the outer ring 3 are conical raceway surfaces. have.
内輪２は、円筒ころ軸受部３０と円すいころ軸受部３１とを包括する一体構造としている。内輪２の第１軌道面６ａの反円すいころ軸受部側の軸方向端部に、径方向外径に突出する第１鍔部２１ａを形成している。また、第１軌道面６ａと第２軌道面６ｂとの間には、径方向外径に突出する第２鍔部２１ｂを形成している。さらに、第２軌道面６ｂの反円筒ころ軸受部側の軸方向端部に、第１鍔部２１ａや第２鍔部２１ｂよりも大径の第３鍔部２１ｃを形成している。そして、第１鍔部２１ａと第２鍔部２１ｂとの間に円筒ころ４ａが配設されるとともに、第２鍔部２１ｂと第３鍔部２１ｃとの間に円すいころ４ｂが配設されている。内輪２の内径面は、第１鍔部２１ａ側から第３鍔部２１ｃ側まで内径が一定の円筒状のはめあい部２２を有しており、このはめあい部２２が車軸１に嵌合している。 The inner ring 2 has an integral structure including a cylindrical roller bearing portion 30 and a tapered roller bearing portion 31. A first flange 21a that protrudes to the outer diameter in the radial direction is formed at the axial end of the first raceway surface 6a of the inner ring 2 on the side opposite to the tapered roller bearing. In addition, a second flange portion 21b is formed between the first raceway surface 6a and the second raceway surface 6b so as to protrude to the outer diameter in the radial direction. Further, a third flange portion 21c having a diameter larger than that of the first flange portion 21a and the second flange portion 21b is formed at the axial end of the second raceway surface 6b on the side opposite to the cylindrical roller bearing portion. The cylindrical roller 4a is disposed between the first flange portion 21a and the second flange portion 21b, and the tapered roller 4b is disposed between the second flange portion 21b and the third flange portion 21c. Yes. An inner diameter surface of the inner ring 2 has a cylindrical fitting portion 22 having a constant inner diameter from the first flange portion 21 a side to the third flange portion 21 c side, and the fitting portion 22 is fitted to the axle 1. .
軸受内への異物の侵入や軸受内部からの潤滑剤の漏出を防止するため、軸受の両側にはシール構造２６ａ、２６ｂを設けている。シール構造２６ａ、２６ｂは、外輪３の両端開口部に装着したシールケース２７ａ、２７ｂと、シールケース２７ａ、２７ｂの内部に保持させたオイルシール２８ａ、２８ｂとで構成される。この実施の形態では、オイルシール２８ａ、２８ｂを、シールケース２７ａ、２７ｂを介して外輪３に取り付けてある。これにより、内輪２、オイルシール２８ａ、２８ｂの間にはグリースが充填され、円筒ころ４ａや円すいころ４ｂ等の潤滑を行う。 Seal structures 26a and 26b are provided on both sides of the bearing in order to prevent foreign matter from entering the bearing and leakage of the lubricant from the bearing. The seal structures 26a and 26b are configured by seal cases 27a and 27b attached to both end openings of the outer ring 3 and oil seals 28a and 28b held inside the seal cases 27a and 27b. In this embodiment, oil seals 28a and 28b are attached to the outer ring 3 via seal cases 27a and 27b. Thus, grease is filled between the inner ring 2 and the oil seals 28a and 28b, and the cylindrical rollers 4a and the tapered rollers 4b are lubricated.
第１実施形態の複列ころ軸受の組立方法は、内輪２に第１保持器５ａ及び第２保持器５ｂを固定して、円筒ころ４ａ及び円すいころ４ｂを保持器５ａ、５ｂの外径側から配設する。そして、外輪３を反円すいころ軸受部側から組み込む。これにより、円筒ころ軸受部３０と円すいころ軸受部３１とを備え、内輪２が、円筒ころ軸受部３０と円すいころ軸受部３１とを包括する一体構造である複列ころ軸受を組み立てることができる。 In the assembly method of the double row roller bearing of the first embodiment, the first retainer 5a and the second retainer 5b are fixed to the inner ring 2, and the cylindrical roller 4a and the tapered roller 4b are connected to the outer diameter side of the retainers 5a and 5b. It arranges from. And the outer ring | wheel 3 is integrated from an anti-taper roller bearing part side. Thereby, it is possible to assemble a double row roller bearing that includes the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31 and in which the inner ring 2 has an integral structure including the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31. .
このように、本発明の第１実施形態の複列ころ軸受では、内輪２を円筒ころ軸受部３０と円すいころ軸受部３１とを包括する一体構造とすることができる。複列円すいころ軸受は内輪２が分割されているため、内輪内径面に小鍔面取りとはめあい部との繋ぎ部を有し、この繋ぎ部がスタンプ疵の発生源となる。これに対し、内輪２を一体構造とすることにより、このような繋ぎ部を省略することができる。従って、円すいころ軸受による車両の良好な乗り心地を維持しながら、スタンプ疵の発生を防止することができる。 Thus, in the double row roller bearing according to the first embodiment of the present invention, the inner ring 2 can have an integral structure including the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31. In the double row tapered roller bearing, since the inner ring 2 is divided, the inner ring inner diameter surface has a connecting portion with a chamfered chamfer and a fitting portion, and this connecting portion becomes a source of stamp wrinkles. On the other hand, such a connecting portion can be omitted by making the inner ring 2 an integral structure. Accordingly, it is possible to prevent the occurrence of stamp wrinkles while maintaining good riding comfort of the vehicle by the tapered roller bearing.
外輪３の両端部又は一方の端部に軸方向端部を密封するシール構造２６を備えることにより、メンテナンスの簡略化等を図ることができる。 By providing the seal structure 26 that seals the axial end at both ends or one end of the outer ring 3, the maintenance can be simplified.
次に、本発明の第２実施形態の複列ころ軸受について説明する。この場合、図２に示すように、外輪３の内径面の軸方向中央部に内径方向に突出する鍔部２３を設けるとともに、第１転動体側の外輪端部に円筒ころ４ａの軸方向外端部を受ける鍔輪２４を付設している。つまり、外輪３の第１軌道面７ａと第２軌道面７ｂとの間には、径方向内径に突出する外輪鍔部２３が形成されている。また、内輪２の第１軌道面６ａの反円すいころ軸受部側の軸方向端部の第１鍔部２１ａを省略している。さらに、外輪３の円筒ころ軸受部３０の軸方向端部には、外輪３の軸方向端面に当接して、円筒ころ４ａの軸方向端部を受ける短円筒状の鍔輪２４を付設している。また、第１保持器５ａを、外輪３の内径面と摺接する外輪案内保持器としている。 Next, the double row roller bearing of 2nd Embodiment of this invention is demonstrated. In this case, as shown in FIG. 2, a flange 23 projecting in the inner diameter direction is provided at the axial central portion of the inner diameter surface of the outer ring 3, and the outer end of the cylindrical roller 4a in the axial direction outside the outer ring end on the first rolling element side. A collar 24 for receiving the end is attached. That is, the outer ring flange 23 that protrudes radially inward is formed between the first raceway surface 7a and the second raceway surface 7b of the outer ring 3. Further, the first flange 21a at the axial end of the first raceway surface 6a of the inner ring 2 on the side opposite to the tapered roller bearing is omitted. Further, a short cylindrical hook ring 24 that abuts the axial end surface of the outer ring 3 and receives the axial end of the cylindrical roller 4 a is attached to the axial end of the cylindrical roller bearing portion 30 of the outer ring 3. Yes. Further, the first cage 5 a is an outer ring guide cage that is in sliding contact with the inner diameter surface of the outer ring 3.
第２実施形態の複列ころ軸受の組立方法は、外輪３と第１保持器５ａとの軸方向位置を固定した後、円筒ころ４ａを第１保持器５ａの内径側から配設する。これにより、外輪３、第１保持器５ａ、及び円筒ころ４ａからなる外輪組立品を構成する。そして、内輪２に第２保持器５ｂを固定した後、円すいころ４ｂを配設して、外輪組立品を反円すいころ軸受部側から内輪２に組み込み、さらに鍔輪２４を組み込む。これにより、円筒ころ軸受部３０と円すいころ軸受部３１とを備え、内輪２が、円筒ころ軸受部３０と円すいころ軸受部３１とを包括する一体構造である複列ころ軸受を組み立てることができる。 In the method for assembling the double row roller bearing of the second embodiment, after fixing the axial position of the outer ring 3 and the first cage 5a, the cylindrical roller 4a is disposed from the inner diameter side of the first cage 5a. Thereby, the outer ring assembly which consists of the outer ring | wheel 3, the 1st holder | retainer 5a, and the cylindrical roller 4a is comprised. And after fixing the 2nd retainer 5b to the inner ring | wheel 2, the tapered roller 4b is arrange | positioned, an outer ring assembly is integrated in the inner ring | wheel 2 from an anti-taper roller bearing part side, and the collar ring 24 is further integrated. Thereby, it is possible to assemble a double row roller bearing that includes the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31 and in which the inner ring 2 has an integral structure including the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31. .
このように、第２実施形態では、外輪構成品と内輪２とを分離することができて、分割生産・組立・管理が可能となり、生産性の向上を図ることができる。なお、図２に示す複列ころ軸受において、図１に示す複列ころ軸受と同様の構成については、図１と同一符号を付してその説明を省略する。 As described above, in the second embodiment, the outer ring component and the inner ring 2 can be separated, and divided production, assembly, and management can be performed, and productivity can be improved. In the double row roller bearing shown in FIG. 2, the same components as those in the double row roller bearing shown in FIG.
次に、本発明の第３実施形態の複列ころ軸受について説明する。この場合、図３に示すように、外輪３を、円筒ころ軸受部３０に使用される第１外輪３ａと、円すいころ軸受部３１に使用される第２外輪３ｂとから構成している。一対の外輪３ａ、３ｂ間には、間座２５が配設され、一対の外輪３ａ、３ｂは、内端面同士が間座２５を介して突き合わされた状態となっている。内輪２は、前記第１実施形態の複列ころ軸受に使用した内輪２と同様のものを使用している。 Next, a double row roller bearing according to a third embodiment of the present invention will be described. In this case, as shown in FIG. 3, the outer ring 3 includes a first outer ring 3 a used for the cylindrical roller bearing portion 30 and a second outer ring 3 b used for the tapered roller bearing portion 31. A spacer 25 is disposed between the pair of outer rings 3 a and 3 b, and the inner end surfaces of the pair of outer rings 3 a and 3 b are in a state of being abutted via the spacer 25. The inner ring 2 is the same as the inner ring 2 used in the double row roller bearing of the first embodiment.
第３実施形態の複列ころ軸受の組立方法は、内輪２に第１保持器５ａ及び第２保持器５ｂを固定して、円筒ころ４ａ及び円すいころ４ｂを保持器５ａ、５ｂの外径側から配設する。そして、第２外輪３ｂ、間座２５、第１外輪３ａを、反円すいころ軸受部側から組み込む。これにより、円筒ころ軸受部３０と円すいころ軸受部３１とを備え、内輪２が、円筒ころ軸受部３０と円すいころ軸受部３１とを包括する一体構造である複列ころ軸受を組み立てることができる。 In the assembly method of the double row roller bearing of the third embodiment, the first retainer 5a and the second retainer 5b are fixed to the inner ring 2, and the cylindrical roller 4a and the tapered roller 4b are connected to the outer diameter side of the retainers 5a and 5b. It arranges from. And the 2nd outer ring | wheel 3b, the spacer 25, and the 1st outer ring | wheel 3a are integrated from the anti-taper roller bearing part side. Thereby, it is possible to assemble a double row roller bearing that includes the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31 and in which the inner ring 2 has an integral structure including the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31. .
第３実施形態の複列ころ軸受では、外輪を第１外輪３ａと第２外輪３ｂとから構成しているので、外輪部で損傷が発生した場合に、損傷した外輪部のみの交換をすればよく、軸受全体を交換する必要がなくなる。なお、図３に示す複列ころ軸受において、図１及び図２に示す複列ころ軸受と同様の構成については、図１及び図２と同一符号を付してその説明を省略する。 In the double row roller bearing of the third embodiment, since the outer ring is composed of the first outer ring 3a and the second outer ring 3b, if the outer ring part is damaged, only the damaged outer ring part is replaced. Well, it is not necessary to replace the entire bearing. In the double row roller bearing shown in FIG. 3, the same components as those in the double row roller bearing shown in FIGS. 1 and 2 are denoted by the same reference numerals as those in FIGS. 1 and 2, and the description thereof is omitted.
次に、本発明の第４実施形態の複列ころ軸受について説明する。この場合、図４に示すように、外輪３は、円筒ころ軸受部３０に使用される第１外輪３ａと、円すいころ軸受部３１に使用される第２外輪３ｂとから構成されている。第１外輪３ａの円筒ころ軸受部３０側の端部には、径方向内径に突出する外輪鍔部２９を形成している。一対の外輪３ａ、３ｂ間には、間座２５が配設され、一対の外輪３ａ、３ｂは、内端面同士が間座２５を介して突き合わされた状態となっている。また、第１保持器５ａを、外輪３の内径面と摺接する外輪案内保持器としている。内輪は、前記第２実施形態の複列ころ軸受に使用した内輪２と同様のものを使用している。 Next, a double row roller bearing according to a fourth embodiment of the present invention will be described. In this case, as shown in FIG. 4, the outer ring 3 includes a first outer ring 3 a used for the cylindrical roller bearing portion 30 and a second outer ring 3 b used for the tapered roller bearing portion 31. An outer ring flange portion 29 that protrudes radially inward is formed at the end of the first outer ring 3a on the cylindrical roller bearing portion 30 side. A spacer 25 is disposed between the pair of outer rings 3 a and 3 b, and the inner end surfaces of the pair of outer rings 3 a and 3 b are in a state of being abutted via the spacer 25. Further, the first cage 5 a is an outer ring guide cage that is in sliding contact with the inner diameter surface of the outer ring 3. The inner ring is the same as the inner ring 2 used in the double row roller bearing of the second embodiment.
第４実施形態の複列ころ軸受の組立方法は、第１外輪３ａと第１保持器５ａとの軸方向位置を固定した後、円筒ころ４ａを第１保持器５ａの内径側から配設する。これにより、第１外輪３ａ、第１保持器５ａ、及び円筒ころ４ａからなる外輪組立品を構成する。そして、内輪２に第２保持器５ｂ及び円すいころ４ｂを配設して、第２外輪３ｂ、間座２５を組み込んだ後、外輪組立品を反円すいころ軸受部側から内輪２に組み込む。これにより、円筒ころ軸受部３０と円すいころ軸受部３１とを備え、内輪２が、円筒ころ軸受部３０と円すいころ軸受部３１とを包括する一体構造である複列ころ軸受を組み立てることができる。 In the assembly method of the double row roller bearing of the fourth embodiment, after fixing the axial positions of the first outer ring 3a and the first cage 5a, the cylindrical roller 4a is disposed from the inner diameter side of the first cage 5a. . Thereby, the outer ring assembly which consists of the 1st outer ring | wheel 3a, the 1st holder | retainer 5a, and the cylindrical roller 4a is comprised. Then, after the second cage 5b and the tapered roller 4b are disposed on the inner ring 2 and the second outer ring 3b and the spacer 25 are assembled, the outer ring assembly is assembled into the inner ring 2 from the side opposite the tapered roller bearing. Thereby, it is possible to assemble a double row roller bearing that includes the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31 and in which the inner ring 2 has an integral structure including the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31. .
本発明の第４実施形態の複列ころ軸受では、外輪を第１外輪３ａと第２外輪３ｂとから構成しているので、外輪部で損傷が発生した場合に、損傷した外輪部のみの交換をすればよく、軸受全体を交換する必要がなくなる。また、外輪構成品と内輪２とを分離することができて、分割生産・組立・管理が可能となり、生産性の向上を図ることができる。なお、図４に示す複列ころ軸受において、図１〜図３の構成と同様のものについては、図１〜図３と同一符号を付し、その説明を省略する。 In the double row roller bearing according to the fourth embodiment of the present invention, the outer ring is composed of the first outer ring 3a and the second outer ring 3b. Therefore, when the outer ring portion is damaged, only the damaged outer ring portion is replaced. This eliminates the need to replace the entire bearing. Further, the outer ring component and the inner ring 2 can be separated, and divided production, assembly, and management can be performed, and productivity can be improved. In the double row roller bearing shown in FIG. 4, the same reference numerals as those in FIGS. 1 to 3 are assigned to the same components as those in FIGS. 1 to 3, and description thereof is omitted.
以上、本発明の実施形態につき説明したが、本発明は前記実施形態に限定されることなく種々の変形が可能であって、例えば、円すいころ軸受部３１の保持器５ｂは、外輪案内、内輪案内、転動体案内等の種々のものを用いることができる。内輪２は、円筒ころ軸受部３０と円すいころ軸受部３１とを包含する一体型のものであればよく、第１鍔部２１ａや第２鍔部２１ｂを省略することもできる。鍔輪２４や間座２５の形状としては、実施形態のものに限られず、鍔輪２４の内径側が軸受内部に突出するものであったり、間座２５が逆Ｔ字状のものであったりしてもよい。 As described above, the embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications are possible. For example, the cage 5b of the tapered roller bearing portion 31 includes an outer ring guide and an inner ring. Various things, such as guidance and rolling element guidance, can be used. The inner ring 2 may be an integral type including the cylindrical roller bearing portion 30 and the tapered roller bearing portion 31, and the first flange portion 21a and the second flange portion 21b may be omitted. The shape of the collar 24 and the spacer 25 is not limited to that of the embodiment, and the inner diameter side of the collar 24 may protrude into the bearing, or the spacer 25 may be an inverted T shape. May be.
１ 軸（車軸）
２ 内輪
３ 外輪
４ 転動体
５ 保持器
２３ 鍔部
２４ 鍔輪
３０ 円筒ころ軸受部
３１ 円すいころ軸受部
1 axle (axle)
2 Inner ring 3 Outer ring 4 Rolling element 5 Cage 23 Girder 24 Girder 30 Cylindrical roller bearing 31 Tapered roller bearing
Claims (6)
第１転動体が円筒ころにて構成される円筒ころ軸受部と、第２転動体が円すいころにて構成される円すいころ軸受部とを備え、
前記内輪を、円筒ころ軸受部と円すいころ軸受部とを包括する一体構造とし、
前記外輪を反円すいころ軸受部側から組み込むことによって組み立て可能であると共に、前記外輪を反円すいころ軸受部側から分離することによって分割可能であることを特徴とする複列ころ軸受。 An inner ring having only two rows of raceways, an outer race having a raceway disposed on the outer peripheral side of the inner race and facing the raceway, and each of the first and second rows arranged between the inner race and the outer race are only one row. In a double row roller bearing for supporting an axle of a railway vehicle, comprising: a rolling element; a first cage that holds the first rolling element; and a second cage that holds the second rolling element.
A cylindrical roller bearing part in which the first rolling element is constituted by a cylindrical roller; and a tapered roller bearing part in which the second rolling element is constituted by a tapered roller;
The inner ring has an integral structure including a cylindrical roller bearing portion and a tapered roller bearing portion ,
A double-row roller bearing characterized in that it can be assembled by incorporating the outer ring from the anti-taper roller bearing part side and can be divided by separating the outer ring from the anti-taper roller bearing part side .
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3621381A1 (en) * | 1986-06-26 | 1988-01-28 | Skf Gmbh | DOUBLE-ROW ROLLER BEARING UNIT |
| JPH0480753U (en) * | 1990-11-22 | 1992-07-14 | ||
| JP3901874B2 (en) * | 1998-06-23 | 2007-04-04 | 株式会社ジェイテクト | Double row tapered roller bearing device |
| JP2006029475A (en) * | 2004-07-16 | 2006-02-02 | Nsk Ltd | Combined rolling bearing for axle shaft |
| JP2006335138A (en) * | 2005-05-31 | 2006-12-14 | Nsk Ltd | Bering unit for railroad vehicle |
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