JP2008185142A - Tapered roller bearing - Google Patents

Tapered roller bearing Download PDF

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Publication number
JP2008185142A
JP2008185142A JP2007019766A JP2007019766A JP2008185142A JP 2008185142 A JP2008185142 A JP 2008185142A JP 2007019766 A JP2007019766 A JP 2007019766A JP 2007019766 A JP2007019766 A JP 2007019766A JP 2008185142 A JP2008185142 A JP 2008185142A
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Japan
Prior art keywords
tapered roller
roller bearing
cage
tapered
diameter side
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Withdrawn
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JP2007019766A
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Japanese (ja)
Inventor
Yasuhiro Uehori
泰裕 上堀
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2007019766A priority Critical patent/JP2008185142A/en
Publication of JP2008185142A publication Critical patent/JP2008185142A/en
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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
    • F16C33/46—Cages for rollers or needles
    • F16C33/49—Cages for rollers or needles comb-shaped
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/38—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers
    • F16C19/383—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F16C19/385—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings
    • F16C19/386—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with two or more rows of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone with two rows, i.e. double-row tapered roller bearings in O-arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tapered roller bearing which is light and compact and has a large rated load capacity. <P>SOLUTION: The tapered roller bearing comprises an outer ring 1 having a pair of tapered outward raceway surfaces 1a, 1a on the inner periphery, a pair of inner rings 2 having tapered inward raceway surfaces 2b on the outer peripheries in opposition to the outward raceway surfaces 1a, 1a, double-row tapered rollers 3 arranged between the raceway surfaces 2b, 1a of the inner and outer rings 2, 1, and two cages 4 for rotatably holding the tapered rollers 3 in rows. Each cage 4 has an annular portion 4a arranged on the large diameter side of the pair of inner ring 2, and a plurality of columnar portions 4b extending from the annular portion 4a to a position not ranging over small diameter side end faces 3b of the tapered rollers 3. The tapered rollers 3 are arranged and held at their large ends 3a between the columnar portions 4b. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、転動体として円すいころを用いた円すいころ軸受に関する。   The present invention relates to a tapered roller bearing using a tapered roller as a rolling element.

例えば鉄道車両の車輪用軸受として、複列円すいころ軸受が用いられている（特許文献１参照）。従来の複列円すいころ軸受は、図４に示すように、一体型の外輪１０１と、一対の分割型の内輪１０２，１０２を備え、保持器１０４のポケット１０４ａ内に保持した円すいころ１０３を、内外輪１０１，１０２の間に回転自在に収容した構造となっている。   For example, double row tapered roller bearings are used as bearings for wheels of railway vehicles (see Patent Document 1). As shown in FIG. 4, the conventional double row tapered roller bearing includes an integrated outer ring 101 and a pair of split inner rings 102, 102, and a tapered roller 103 held in a pocket 104 a of a cage 104. The inner and outer rings 101 and 102 are rotatably accommodated.

図４に示す複列円すいころ軸受に荷重が作用した場合は、円すいころ１０３がその大端側に押圧されるため、この荷重を受けるべく、円すいころ１０３の大端側の内輪１０２外周には大鍔部１０２ａを設けている。また、軸受を車両に組み込むまでの間に円すいころ１０３が小端側に脱落するのを防止するため、円すいころ１０３の小端側の内輪１０２外周にも小鍔１０２ｂを設けている。
特開平７−１５１１４２号公報 When a load is applied to the double row tapered roller bearing shown in FIG. 4, the tapered roller 103 is pressed to the large end side thereof, so that the outer end of the inner ring 102 on the large end side of the tapered roller 103 is exposed to the load. A large collar portion 102a is provided. Further, in order to prevent the tapered roller 103 from falling off to the small end side before the bearing is incorporated into the vehicle, a small flange 102b is also provided on the outer periphery of the inner ring 102 on the small end side of the tapered roller 103.
JP 7-151142 A

ところで、軸受の負荷容量を増大させる設計として、円すいころの軸方向の長さ寸法を長くすることがある。円すいころを長くしようとした場合、大鍔１０２ａ又は小鍔１０２ｂの位置をずらさなければならないが、コンパクト化のため内輪幅を拡げないためには、小鍔１０２ｂの方を小さくしたりあるいは省略して、小端側を延長することが考えられる。なお、大鍔１０２ａは荷重を受けるためにある程度の大きさ（強度）が必要であるため、縮小・省略は不適当である。   By the way, as a design for increasing the load capacity of the bearing, the axial length of the tapered roller may be increased. When trying to lengthen the tapered roller, the position of the large collar 102a or the small collar 102b must be shifted, but in order to reduce the inner ring width for compactness, the small collar 102b is made smaller or omitted. Thus, it is conceivable to extend the small end side. In addition, since the large collar 102a needs a certain size (strength) in order to receive a load, reduction and omission are inappropriate.

しかし、図４に示す従来の構造では、円すいころの小端側を長くすると、保持器１０４，１０４の互いに接近する小端部１０４ｂ，１０４ｂが干渉するので、上記のような設計変更が困難であった。   However, in the conventional structure shown in FIG. 4, if the small end side of the tapered roller is lengthened, the small end portions 104b and 104b of the cages 104 and 104 that are close to each other interfere with each other. there were.

そこで、本発明は斯かる実情に鑑み、軽量コンパクトで定格負荷容量の大きい円すいころ軸受を提供しようとするものである。   Therefore, in view of such a situation, the present invention intends to provide a tapered roller bearing that is lightweight and compact and has a large rated load capacity.

請求項１の発明は、内周に円すい状の外方軌道面を有する外輪と、外周に前記外方軌道面と対向する円すい状の内方軌道面を有する内輪と、前記内外輪の両軌道面間に配置した複数の円すいころと、各円すいころを回転自在に保持する保持器を備えた円すいころ軸受において、前記保持器は、前記内輪の大径側に配置した環状部と、環状部から前記円すいころの小径側端面を超えない位置まで延伸した複数本の柱部を備え、各柱部の間に前記円すいころの大端側を配置し保持したものである。   The invention according to claim 1 comprises an outer ring having a conical outer raceway surface on the inner periphery, an inner ring having a conical inner raceway surface facing the outer raceway surface on the outer periphery, and both raceways of the inner and outer rings. In a tapered roller bearing provided with a plurality of tapered rollers arranged between the surfaces and a cage for rotatably holding each tapered roller, the cage includes an annular portion disposed on the large diameter side of the inner ring, and an annular portion A plurality of column portions extending to a position not exceeding the end surface on the small diameter side of the tapered roller, and the large end side of the tapered roller is disposed and held between the column portions.

円すいころの小端側を軸方向に長く成形しても、それに伴って保持器が円すいころの小端側へ突出することがない。つまり、軸受の特に軸方向寸法の拡大を抑えつつ円すいころを長くして軸受の負荷容量を増大させることができる。   Even if the small end side of the tapered roller is formed long in the axial direction, the cage does not protrude toward the small end side of the tapered roller. That is, it is possible to increase the load capacity of the bearing by lengthening the tapered roller while suppressing an increase in the axial dimension of the bearing.

請求項２の発明は、内周に円すい状の一対の外方軌道面を有する外輪と、各々の外周に各外方軌道面と対向する円すい状の内方軌道面を有する一対の内輪と、前記内外輪の両軌道面間に配置した二列の円すいころと、前記円すいころを各列ごとに回転自在に保持する２個の保持器を備えた円すいころ軸受において、各保持器は、前記一対の内輪の大径側に配置した環状部と、環状部から前記円すいころの小径側端面を超えない位置まで延伸した複数本の柱部を備え、各柱部の間に前記円すいころの大端側を配置し保持したものである。   The invention of claim 2 includes an outer ring having a pair of conical outer raceway surfaces on the inner periphery, and a pair of inner rings having a conical inner raceway surface facing each outer raceway surface on each outer periphery, In the tapered roller bearing comprising two rows of tapered rollers disposed between both raceway surfaces of the inner and outer rings and two cages for rotatably holding the tapered rollers for each row, each cage is An annular portion disposed on the large diameter side of the pair of inner rings, and a plurality of column portions extending from the annular portion to a position not exceeding the small diameter side end surface of the tapered roller, the tapered roller having a large size between each column portion. The end side is arranged and held.

円すいころの小端側を軸方向に長く成形しても、保持器同士が干渉することがない。これにより、内輪幅の拡大を抑えて、円すいころを長くすることができ、軸受の負荷容量を増大させることが可能となる。   Even if the small end side of the tapered roller is formed long in the axial direction, the cages do not interfere with each other. Thereby, the expansion of the inner ring width can be suppressed, the tapered roller can be lengthened, and the load capacity of the bearing can be increased.

請求項３の発明は、請求項１又は２に記載の円すいころ軸受において、前記保持器の環状部に前記内輪の大径側に係合可能な係合部を設けたものである。   According to a third aspect of the present invention, in the tapered roller bearing according to the first or second aspect, an engagement portion that can be engaged with the large-diameter side of the inner ring is provided in the annular portion of the cage.

保持器に係合部を設けたことによって、円すいころと保持器を組付けた内輪を外輪に組み込むまでの間に、あるいは、内輪を外輪から取り外したときに、円すいころが小端側に移動して内輪から脱落するのを阻止することができる。つまり、外輪がない場合は、円すいころはその自重によって小端側へ脱落しようとし、これに伴って、保持器も同方向に移動しようとする。このとき、保持器の係合部が内輪の大径側に係合するため、保持器のそれ以上の小端側への移動が規制される。そして、円すいころは保持器の柱部の間に保持されているため、円すいころの内輪からの脱落を阻止することが可能となる。これにより、円すいころ軸受の組立作業性・分解作業性が向上する。   By providing an engaging part on the cage, the tapered roller moves to the small end before the inner ring with the tapered roller and cage assembled to the outer ring or when the inner ring is removed from the outer ring. Thus, it is possible to prevent the inner ring from falling off. In other words, when there is no outer ring, the tapered roller tends to drop to the small end side by its own weight, and accordingly, the cage also moves in the same direction. At this time, since the engaging portion of the cage is engaged with the large diameter side of the inner ring, the further movement of the cage to the small end side is restricted. And since the tapered roller is hold | maintained between the pillar parts of a holder | retainer, it becomes possible to prevent the tapered roller from falling off from the inner ring. Thereby, the assembly workability and disassembly workability of the tapered roller bearing are improved.

請求項４の発明は、請求項１から３のいずれか１項に記載の円すいころ軸受において、前記保持器を冷間圧延鋼板（ＳＰＣ材）又は熱間圧延軟鋼板（ＳＰＨ材）で成形し、かつ、浸炭窒化処理又はガス軟窒化処理をしたものである。   According to a fourth aspect of the present invention, in the tapered roller bearing according to any one of the first to third aspects, the cage is formed of a cold rolled steel plate (SPC material) or a hot rolled mild steel plate (SPH material). And carbonitriding or gas soft nitriding.

このように保持器を成形することにより、保持器の剛性を高め、特に柱部の耐摩耗性を向上させて円すいころの摺接による柱部の表面損傷を防止することができる。   By forming the cage in this manner, the rigidity of the cage can be increased, and in particular, the wear resistance of the column portion can be improved to prevent surface damage to the column portion due to sliding contact of the tapered rollers.

請求項５の発明は、請求項１から３のいずれか１項に記載の円すいころ軸受において、前記保持器をバネ鋼で成形したものである。   A fifth aspect of the present invention is the tapered roller bearing according to any one of the first to third aspects, wherein the cage is formed of spring steel.

保持器の剛性を高めて、耐摩耗性を向上させることができ、特に円すいころの摺接による柱部の表面損傷を防止することができる。   The rigidity of the cage can be increased and the wear resistance can be improved, and in particular, the surface damage of the column portion due to the sliding contact of the tapered rollers can be prevented.

請求項６の発明は、請求項３に記載の円すいころ軸受において、前記保持器の係合部を自己潤滑性を有する樹脂材料で成形したものである。   According to a sixth aspect of the present invention, in the tapered roller bearing according to the third aspect, the engaging portion of the cage is formed of a resin material having a self-lubricating property.

係合部と内輪が接触するような構造にしても、樹脂材料の自己潤滑性により、回転時の係合部と内輪との間の摩擦を抑え、円滑な回転が可能となる。   Even if the engagement portion and the inner ring are in contact with each other, the friction between the engagement portion and the inner ring during rotation is suppressed by the self-lubricating property of the resin material, and smooth rotation is possible.

請求項７の発明は、請求項１から６のいずれか１項に記載の円すいころ軸受において、前記保持器の各柱部の少なくとも先端に自己潤滑性を有する樹脂材料で成形した押え部を設け、前記円すいころを両側の押え部で挟んで回転自在に保持したものである。   According to a seventh aspect of the present invention, in the tapered roller bearing according to any one of the first to sixth aspects, a pressing portion formed of a resin material having a self-lubricating property is provided at least at the tip of each column portion of the cage. The tapered rollers are sandwiched between pressing parts on both sides and are held rotatably.

保持器が押え部にて円すいころを両側から確実に挟持するので、円すいころが保持器から脱落するのを防止することができる。また、樹脂材料の自己潤滑性により押え部と円すいころの表面との間に生じる摩擦を低減してトルクの増大を抑制し、円すいころを円滑に回転保持することができる。   Since the retainer securely holds the tapered roller from both sides at the presser portion, it is possible to prevent the tapered roller from falling off the retainer. Further, the self-lubricating property of the resin material can reduce friction generated between the presser portion and the surface of the tapered roller, thereby suppressing an increase in torque and smoothly rotating and holding the tapered roller.

本発明の円すいころ軸受によれば、軸受の特に軸方向寸法の拡大を抑えつつ、円すいころを長く成形することができ、軸受の負荷容量をアップすることができる。さらに、本発明の構造は、従来の保持器の小端部１０４ｂ（図４参照）を省略した形状となっているので、軸受の軸方向寸法の小型化や軽量化を図ることができる。すなわち、軽量コンパクトで負荷容量の大きい円すいころ軸受とすることができる。また、本発明を自動車の動力系に適用すれば、燃費の向上等も期待することができる。   According to the tapered roller bearing of the present invention, the tapered roller can be formed long while suppressing an increase in the axial dimension of the bearing, and the load capacity of the bearing can be increased. Furthermore, since the structure of the present invention has a shape in which the small end portion 104b (see FIG. 4) of the conventional cage is omitted, the axial dimension of the bearing can be reduced in size and weight. That is, a tapered roller bearing having a light weight and a large load capacity can be obtained. Further, if the present invention is applied to a power system of an automobile, an improvement in fuel consumption can be expected.

以下、本発明の実施の形態について添付図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the accompanying drawings.

本発明に係る円すいころ軸受は、例えば図１に示すような鉄道車両の車輪用軸受に用いられる複列の円すいころ軸受である。同図において、本発明の円すいころ軸受は、一体型の外輪１と、一対の分割型の内輪２，２と、内外輪２，１の間に収容した二列の円すいころ３と、円すいころ３を各列ごとに保持する保持器４を主要な構成要素としている。   The tapered roller bearing according to the present invention is a double-row tapered roller bearing used for a wheel bearing for a railway vehicle as shown in FIG. In the figure, the tapered roller bearing of the present invention includes an integral outer ring 1, a pair of split inner rings 2, 2, two rows of tapered rollers 3 accommodated between the inner and outer rings 2, 1, and a tapered roller. A cage 4 that holds 3 for each column is a main component.

外輪１は両列の円すいころ３を各々転接させる一対の円すい状の外方軌道面１ａ，１ａを外周に有する。一対の内輪２，２は互いに小径側の端面２ａで直接に突き合わせて配置したものであり、内輪２は各列の円すいころ３を転接させる円すい状の内方軌道面２ｂを外周に有している。そして、内外輪２，１の対向する両軌道面２ｂ，１ａ間に円すいころ３を回転自在に収容している。   The outer ring 1 has a pair of conical outer raceway surfaces 1a and 1a on the outer periphery, which respectively contact the tapered rollers 3 in both rows. The pair of inner rings 2, 2 are arranged so as to directly abut each other at the end surface 2a on the small diameter side, and the inner ring 2 has a conical inner raceway surface 2b on the outer periphery for rolling contact with the tapered rollers 3 of each row. ing. And the tapered roller 3 is rotatably accommodated between the both raceway surfaces 2b, 1a of the inner and outer rings 2, 1.

また、内輪２の大径側の外周に鍔部２ｃを設け、荷重が作用した場合の円すいころ３の大端３ａをこの鍔部２ｃで受け止めるようになっている。なお、内輪２の小径側の外周には鍔部（図４の小鍔１０２ｂに相当する）は設けていない。   Further, a flange portion 2c is provided on the outer periphery on the large diameter side of the inner ring 2, and the large end 3a of the tapered roller 3 when a load is applied is received by the flange portion 2c. Note that a flange portion (corresponding to the small flange 102b in FIG. 4) is not provided on the outer periphery of the inner ring 2 on the small diameter side.

保持器４は、それぞれ内輪２の互いに離間する大径側に配置した環状部４ａと、環状部４ａに周方向等間隔に付設した複数本の柱部４ｂを備えている。柱部４ｂは環状部４ａから円すいころ３の小径側端面３ｂ（小端）を超えない位置まで延伸して設けてある。この場合、柱部４ｂの先端は、円すいころ３の軸方向中間位置、つまり円すいころ３の軸方向長さ寸法の２分の１の位置付近にある。そして、各柱部４ｂの間に円すいころ３が１個ずつ配置され、図１に示す如く、柱部４ｂにて円すいころ３の大端３ａ側を保持している。各柱部４ｂは円すいころ３の周面に沿うように先端へ向かって互いに接近するように形成されている。   The cage 4 includes an annular portion 4a disposed on the large-diameter side of the inner ring 2 that is spaced apart from each other, and a plurality of column portions 4b attached to the annular portion 4a at equal intervals in the circumferential direction. The column part 4b extends from the annular part 4a to a position not exceeding the small diameter side end face 3b (small end) of the tapered roller 3. In this case, the tip end of the column portion 4b is in the vicinity of the halfway position in the axial direction of the tapered roller 3, that is, the axial length of the tapered roller 3. One tapered roller 3 is arranged between each column portion 4b, and the large end 3a side of the tapered roller 3 is held by the column portion 4b as shown in FIG. Each column part 4b is formed so that it may mutually approach toward a front-end | tip so that the surrounding surface of the tapered roller 3 may be followed.

保持器４の材質としては、冷間圧延鋼板（ＳＰＣ材）や熱間圧延軟鋼板（ＳＰＨ材）が用いられ、保持器４の成形後に浸炭窒化処理又はガス軟窒化処理の表面熱処理を施してある。また、浸炭窒化処理後、又は浸炭窒化処理をせずに、保持器４の円すいころ３が摺接する部分に高周波焼入れや衝撃焼入れの表面焼入れを行ってもよい。このようにして保持器４を製造することで、保持器４の剛性及び耐摩耗性を向上させることができる。また、上記ＳＰＣ材・ＳＰＨ材の代わりにバネ鋼を用いてもよい。   As a material of the cage 4, a cold rolled steel plate (SPC material) or a hot rolled mild steel plate (SPH material) is used. After the cage 4 is formed, carbonitriding treatment or gas soft nitriding treatment is performed. is there. Further, after the carbonitriding process or without performing the carbonitriding process, surface quenching such as induction quenching or impact quenching may be performed on a portion where the tapered roller 3 of the cage 4 is in sliding contact. By manufacturing the cage 4 in this manner, the rigidity and wear resistance of the cage 4 can be improved. Further, spring steel may be used instead of the SPC material / SPH material.

この円すいころ軸受の組立は、保持器４の各柱部４ｂの間に円すいころ３を収容した上で、各保持器４の内周側に内輪２を押し込んで組付け、さらに組付けたこれらを外輪１の内周にそれぞれ両側から嵌め込むことによって行われる。   The tapered roller bearings are assembled in such a manner that after the tapered rollers 3 are accommodated between the respective pillar portions 4b of the cage 4, the inner ring 2 is pushed into the inner peripheral side of each cage 4 and assembled. Is inserted into the inner circumference of the outer ring 1 from both sides.

図２は本発明の他の実施形態である。同図に示すように、保持器４の環状部４ａには周方向に等間隔に係止片４ｃが設けられている。係止片４ｃの個数は、特に限定しないが、４個から８個が好ましい。係止片４ｃは内輪２の最大外径部（鍔部２ｃの外周面）を越えて内径側に延びており、係止片４ｃの先端（内端）に内輪２の大径側に係合可能な係合部４ｄを有する。内輪２の鍔部２ｃには、保持器４の係合部４ｄが係合する環状の係合受け部２ｄが形成されている。この場合、係合受け部２ｄは、鍔部２ｃの外周面の軸線方向外側を切り欠いて形成されている。係合部４ｄと係合受け部２ｄとの間には、軸線方向及び径方向に僅かな隙間がある。   FIG. 2 shows another embodiment of the present invention. As shown in the figure, the annular portion 4a of the cage 4 is provided with locking pieces 4c at equal intervals in the circumferential direction. The number of the locking pieces 4c is not particularly limited, but is preferably 4 to 8. The locking piece 4c extends to the inner diameter side beyond the maximum outer diameter portion (outer peripheral surface of the flange portion 2c) of the inner ring 2, and is engaged with the large diameter side of the inner ring 2 at the tip (inner end) of the locking piece 4c. It has a possible engaging part 4d. An annular engagement receiving portion 2 d that engages with the engagement portion 4 d of the retainer 4 is formed on the flange portion 2 c of the inner ring 2. In this case, the engagement receiving portion 2d is formed by notching the outer side in the axial direction of the outer peripheral surface of the flange portion 2c. There is a slight gap between the engagement portion 4d and the engagement receiving portion 2d in the axial direction and the radial direction.

このように保持器４に係合部４ｄを設けたことによって、円すいころ３と保持器４を組付けた内輪２を外輪１に組み込むまでの間に、あるいは、外輪１から内輪２を取り外したときに、円すいころ３が内輪２から脱落するのを阻止することができる。つまり、外輪１がない場合は、円すいころ３はその自重によって小端３ｂ側へ脱落しようとし、これに伴って、保持器４も同方向に移動しようとする。このとき、保持器４の係合部４ｄが係合受け部２ｄと軸線方向外側から係合するため、保持器４のそれ以上の小端側への移動が規制される。そして、円すいころ３は保持器４の各柱部４ｂの間に保持されているため、円すいころ３が内輪２から脱落するのを防ぐことができる。   By providing the engaging portion 4d in the cage 4 in this manner, the inner ring 2 is removed from the outer ring 1 until the inner ring 2 in which the tapered roller 3 and the cage 4 are assembled into the outer ring 1 or until the inner ring 2 is assembled. Sometimes, the tapered roller 3 can be prevented from falling off the inner ring 2. That is, when there is no outer ring 1, the tapered roller 3 tries to drop to the small end 3 b side by its own weight, and accordingly, the cage 4 also tries to move in the same direction. At this time, since the engaging portion 4d of the retainer 4 engages with the engagement receiving portion 2d from the outside in the axial direction, the further movement of the retainer 4 to the small end side is restricted. And since the tapered roller 3 is hold | maintained between each pillar part 4b of the holder | retainer 4, it can prevent that the tapered roller 3 falls from the inner ring | wheel 2. FIG.

上記係合受け部２ｄは、係合部４ｄが軸線方向外側から係合できる形状のものであれば、図例の形状に限らず、例えば、鍔部２ｃの外周面に環状溝あるいは突条部を形成して、これを係合受け部４ｄとしてもよい。   The engagement receiving portion 2d is not limited to the shape shown in the figure as long as the engagement portion 4d can be engaged from the outside in the axial direction. For example, an annular groove or a protrusion on the outer peripheral surface of the flange portion 2c. This may be used as the engagement receiving portion 4d.

また、保持器４の少なくとも係合部４ｄを自己潤滑性を有する樹脂材料で成形してもよい。この樹脂材料の自己潤滑性により、係合部４ｄと係合受け部２ｄが接触するような構造にしても、回転時の係合部４ｄと係合受け部２ｄとの間の摩擦を抑え、円滑な回転が可能となる。   Moreover, you may shape | mold at least the engaging part 4d of the holder | retainer 4 with the resin material which has self-lubricating property. Due to the self-lubricating property of this resin material, even when the engagement portion 4d and the engagement receiving portion 2d are in contact with each other, the friction between the engagement portion 4d and the engagement receiving portion 2d during rotation is suppressed, Smooth rotation is possible.

自己潤滑性を有する樹脂材料としては、ポリアミド樹脂（ＰＡ４６、ＰＡ６６）、ポリエーテルエーテルケトン（ＰＥＥＫ）、ポリフェニレンサルファイド（ＰＰＳ）等が挙げられ、また、これらの樹脂材料にカーボンファイバ（ＣＦ）やグラスファイバ（ＧＦ）等の充填材を所定量配合してもよい。   Examples of resin materials having self-lubricating properties include polyamide resins (PA46, PA66), polyetheretherketone (PEEK), polyphenylene sulfide (PPS), and the like, and carbon fiber (CF) and glass are included in these resin materials. A predetermined amount of filler such as fiber (GF) may be blended.

図３は本発明のさらに別の実施形態を示し、この場合、各保持器４の柱部４ｂの先端に自己潤滑性を有する樹脂材料から成る押え部４ｅをインサート成形等により設けている。各押え部４ｅは円すいころ３の表面に接触ないし押し付けられており、言い換えれば、円すいころ３は両側の押え部４ｅにて挟持される。そして、樹脂材料の自己潤滑性により、押え部４ｅは円すいころ３を円滑に回転自在に保持する。なお、押え部４ｅに使用する樹脂材料は、上述した係合部４ｄに使用する樹脂材料と同じものである。また、押え部４ｅは柱部４ｂの先端にのみ設ける場合に限らない。例えば、柱部４ｂの先端から中間部にわたって設けてもよい。   FIG. 3 shows still another embodiment of the present invention. In this case, a pressing portion 4e made of a resin material having a self-lubricating property is provided at the tip of the column portion 4b of each cage 4 by insert molding or the like. Each pressing portion 4e is in contact with or pressed against the surface of the tapered roller 3, in other words, the tapered roller 3 is clamped by the pressing portions 4e on both sides. Then, due to the self-lubricating property of the resin material, the pressing portion 4e holds the tapered roller 3 smoothly and freely. In addition, the resin material used for the holding | maintenance part 4e is the same as the resin material used for the engaging part 4d mentioned above. Further, the pressing portion 4e is not limited to being provided only at the tip of the column portion 4b. For example, you may provide from the front-end | tip of the pillar part 4b to an intermediate part.

なお、上記図２と図３において、図１と同一の符号の箇所は図１と同様の構成であるので説明を省略する。   2 and 3, the same reference numerals as those in FIG. 1 have the same configurations as those in FIG.

本発明は上述の実施形態に限定されるものではなく、例えば、本発明の円すいころ軸受の構成を一列の円すいころ軸受に適用してもよい。また、本発明を鉄道車両の車輪用軸受以外に、自動車の動力伝達系や、これ以外の工作機械の主軸等の支持に用いることもできる。   The present invention is not limited to the above-described embodiment. For example, the configuration of the tapered roller bearing of the present invention may be applied to a single row of tapered roller bearings. Further, the present invention can be used to support a power transmission system of an automobile, a spindle of a machine tool other than this, in addition to a wheel bearing for a railway vehicle.

本発明に係る円すいころ軸受の実施の一形態を示す断面図である。It is sectional drawing which shows one Embodiment of the tapered roller bearing which concerns on this invention. 同円すいころ軸受の他の実施形態を示す断面図である。It is sectional drawing which shows other embodiment of the same tapered roller bearing. 同円すいころ軸受の別の実施形態を示す断面図である。It is sectional drawing which shows another embodiment of the same tapered roller bearing. 従来の円すいころ軸受の断面図である。It is sectional drawing of the conventional tapered roller bearing.

符号の説明Explanation of symbols

１ 外輪
１ａ 外方軌道面
２ 内輪
２ｂ 内方軌道面
３ 円すいころ
３ａ 大端
３ｂ 小端
４ 保持器
４ａ 環状部
４ｂ 柱部
４ｄ 係合部
４ｅ 押え部 DESCRIPTION OF SYMBOLS 1 Outer ring 1a Outer raceway surface 2 Inner ring 2b Inner raceway surface 3 Tapered roller 3a Large end 3b Small end 4 Cage 4a Annular part 4b Pillar part 4d Engagement part 4e Holding part

Claims (7)

内周に円すい状の外方軌道面を有する外輪と、外周に前記外方軌道面と対向する円すい状の内方軌道面を有する内輪と、前記内外輪の両軌道面間に配置した複数の円すいころと、各円すいころを回転自在に保持する保持器を備えた円すいころ軸受において、
前記保持器は、前記内輪の大径側に配置した環状部と、環状部から前記円すいころの小径側端面を超えない位置まで延伸した複数本の柱部を備え、各柱部の間に前記円すいころの大端側を配置し保持したことを特徴とする円すいころ軸受。 An outer ring having a conical outer raceway surface on the inner periphery, an inner ring having a conical inner raceway surface facing the outer raceway surface on the outer periphery, and a plurality of disposed between both raceway surfaces of the inner and outer rings In a tapered roller bearing having a tapered roller and a cage that rotatably holds each tapered roller,
The cage includes an annular portion disposed on the large-diameter side of the inner ring, and a plurality of column portions extending from the annular portion to a position not exceeding the small-diameter side end surface of the tapered roller, and between the column portions, A tapered roller bearing in which the large end side of the tapered roller is arranged and held. 内周に円すい状の一対の外方軌道面を有する外輪と、各々の外周に各外方軌道面と対向する円すい状の内方軌道面を有する一対の内輪と、前記内外輪の両軌道面間に配置した二列の円すいころと、前記円すいころを各列ごとに回転自在に保持する２個の保持器を備えた円すいころ軸受において、
各保持器は、前記一対の内輪の大径側に配置した環状部と、環状部から前記円すいころの小径側端面を超えない位置まで延伸した複数本の柱部を備え、各柱部の間に前記円すいころの大端側を配置し保持したことを特徴とする円すいころ軸受。 An outer ring having a pair of conical outer raceway surfaces on the inner periphery, a pair of inner rings having a conical inner raceway surface facing each outer raceway surface on each outer periphery, and both raceway surfaces of the inner and outer rings In a tapered roller bearing provided with two rows of tapered rollers disposed between and two cages for rotatably holding the tapered rollers for each row,
Each cage includes an annular portion disposed on the large-diameter side of the pair of inner rings, and a plurality of column portions extending from the annular portion to a position not exceeding the end surface on the small-diameter side of the tapered roller. The tapered roller bearing is characterized in that the large end side of the tapered roller is disposed and held in the tapered roller bearing. 前記保持器の環状部に前記内輪の大径側に係合可能な係合部を設けたことを特徴とする請求項１又は２に記載の円すいころ軸受。   The tapered roller bearing according to claim 1, wherein an engagement portion that can be engaged with a large diameter side of the inner ring is provided in an annular portion of the cage. 前記保持器を冷間圧延鋼板（ＳＰＣ材）又は熱間圧延軟鋼板（ＳＰＨ材）で成形し、かつ、浸炭窒化処理又はガス軟窒化処理をしたことを特徴とする請求項１から３のいずれか１項に記載の円すいころ軸受。   4. The cage according to claim 1, wherein the cage is formed of a cold rolled steel plate (SPC material) or a hot rolled mild steel plate (SPH material) and subjected to carbonitriding or gas soft nitriding. The tapered roller bearing according to claim 1. 前記保持器をバネ鋼で成形したことを特徴とする請求項１から３のいずれか１項に記載の円すいころ軸受。   The tapered roller bearing according to any one of claims 1 to 3, wherein the cage is formed of spring steel. 前記保持器の係合部を自己潤滑性を有する樹脂材料で成形したことを特徴とする請求項３に記載の円すいころ軸受。   The tapered roller bearing according to claim 3, wherein the engaging portion of the cage is formed of a resin material having self-lubricating properties. 前記保持器の各柱部の少なくとも先端に自己潤滑性を有する樹脂材料で成形した押え部を設け、前記円すいころを両側の押え部で挟んで回転自在に保持したことを特徴とする請求項１から６のいずれか１項に記載の円すいころ軸受。   2. A retainer formed of a self-lubricating resin material is provided at least at the tip of each column of the retainer, and the tapered roller is sandwiched between the retainers on both sides and held rotatably. The tapered roller bearing according to any one of items 1 to 6.
JP2007019766A 2007-01-30 2007-01-30 Tapered roller bearing Withdrawn JP2008185142A (en)

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