JP2020159533A - Comb-shaped cage for self-aligning roller bearing and self-aligning roller bearing - Google Patents

Comb-shaped cage for self-aligning roller bearing and self-aligning roller bearing Download PDF

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JP2020159533A
JP2020159533A JP2019062305A JP2019062305A JP2020159533A JP 2020159533 A JP2020159533 A JP 2020159533A JP 2019062305 A JP2019062305 A JP 2019062305A JP 2019062305 A JP2019062305 A JP 2019062305A JP 2020159533 A JP2020159533 A JP 2020159533A
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cage
self
comb
aligning roller
pillar
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夏海 宮田
Natsumi Miyata
夏海 宮田
吉田　和司
Kazushi Yoshida
和司 吉田
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2019062305A priority Critical patent/JP2020159533A/en
Priority to PCT/JP2020/012274 priority patent/WO2020196252A1/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
    • F16C23/00—Bearings for exclusively rotary movement adjustable for aligning or positioning
    • F16C23/06—Ball or roller bearings
    • F16C23/08—Ball or roller bearings self-adjusting
    • 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

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Support Of The Bearing (AREA)

Abstract

To provide a comb-shaped cage for a self-aligning roller bearing which can improve roller assembling performance, can prevent the collapse of a shape caused by the deformation of the cage at roller assembling, and can reduce its weight.SOLUTION: A comb-shaped cage for a self-aligning roller bearing is formed of an annular part 5 and a plurality of column parts 6 into a comb shape, and pockets 7 for holding barrel-shaped rollers 3 are formed. A pocket inner face 6a of each column part 6 is formed into a cylinder face extending in a direction vertical to a cage radial direction at the deepest part of an inner ring raceway surface 1a. A tapered part 9 descending to a cage inside diameter side as reaching a forefront is formed at an outside diameter face of a tip of the column part 5. The tapered part 9 starts from a column-part tip side on a position in a cage axial direction being a maximum diameter of the roller 3, or rather than the position in the axial direction. A column part width when viewing the column part 6 from the outside of the cage radial direction to a center side becomes the narrowest at the forefront of the column part 6.SELECTED DRAWING: Figure 1

Description

この発明は、自動調心ころ軸受で使用されるくし型保持器、およびこの保持器を使用する軸受、特に風力発電機等に使われる大型の軸受で重量大および組立に工数が必要な軸受に、およびその保持器に関する。 The present invention applies to comb-shaped cages used in self-aligning roller bearings, and bearings using this cage, especially large bearings used in wind power generators, etc., which are heavy and require man-hours for assembly. , And its cage.

自動調心ころ軸受は、図１２に示すように、内輪１と外輪２の軌道面１ａ，２ａ間に、ころ３が複列に介在し、ころ３を保持する保持器４が各列毎に設けられている。外輪２の軌道面２ａは両列にわたる球面に形成され、ころ３は、外周面が外輪２の軌道面２ａに沿う形状、いわゆる樽形に形成されている。 In the self-aligning roller bearing, as shown in FIG. 12, rollers 3 are interposed between the raceway surfaces 1a and 2a of the inner ring 1 and the outer ring 2 in multiple rows, and a cage 4 for holding the rollers 3 is provided for each row. It is provided. The raceway surface 2a of the outer ring 2 is formed on a spherical surface extending over both rows, and the roller 3 is formed in a so-called barrel shape having an outer peripheral surface along the raceway surface 2a of the outer ring 2.

保持器４は、図１４のように、環状部５とその周方向複数箇所から軸方向に突出する複数の柱部６とでくし型に形成され、隣合う柱部６の間で、ころ３を保持するポケット７が形成される。各柱部６のポケット７を構成する面であるポケット内面６ａ（図１３参照）は、ころ３の最大径に対応する円筒面に形成される。各柱部６は軸方向に突出しているが、円筒面のポケット内面６ａは、その中心ｃが、内輪軌道面溝形状最深部の保持器半径方向に垂直な方向に延びており、柱部６に対して傾斜する。このため、柱部内面６ａは、その傾斜した円筒面の中心に沿う方向にドリル加工することで形成されている。 As shown in FIG. 14, the cage 4 is formed in a comb shape with an annular portion 5 and a plurality of pillar portions 6 projecting axially from a plurality of locations in the circumferential direction thereof, and a roller 3 is formed between adjacent pillar portions 6. A pocket 7 is formed to hold the. The pocket inner surface 6a (see FIG. 13), which is a surface forming the pocket 7 of each pillar portion 6, is formed on a cylindrical surface corresponding to the maximum diameter of the roller 3. Each pillar portion 6 projects in the axial direction, but the center c of the pocket inner surface 6a of the cylindrical surface extends in a direction perpendicular to the cage radial direction at the deepest portion of the inner ring raceway surface groove shape, and the pillar portion 6 Tilt against. Therefore, the inner surface 6a of the pillar portion is formed by drilling in the direction along the center of the inclined cylindrical surface.

特開２００５−３４４８４８号公報Japanese Unexamined Patent Publication No. 2005-344748 特開２００６−３０８０４３号公報Japanese Unexamined Patent Publication No. 2006-308043 特開２０１７−１８０８３１号公報JP-A-2017-180831

前記のように、柱部６のポケット内面６ａが柱部６に対して傾斜しているため、柱部６の保持器円周方向の肉厚は均一ではない。図１４に示すように、柱部６は、外径側に比べて内径側の肉厚が薄く、外径面では柱部中央付近が最も薄肉になり、柱部先端が最も厚肉になる。すなわち、図１５のように、柱部６を外径側から見ると、柱部中央付近（矢印ｅで示す部分）が最も薄肉になっている。また、図１６のように、柱部６を内径側から見ると、柱部先端（矢印ｆで示す部分）が最も薄肉になっている。 As described above, since the pocket inner surface 6a of the pillar portion 6 is inclined with respect to the pillar portion 6, the wall thickness of the pillar portion 6 in the circumferential direction of the cage is not uniform. As shown in FIG. 14, the pillar portion 6 has a thinner wall thickness on the inner diameter side than that on the outer diameter side, and has the thinnest wall thickness near the center of the pillar portion and the thickest wall thickness at the tip of the pillar portion on the outer diameter surface. That is, as shown in FIG. 15, when the pillar portion 6 is viewed from the outer diameter side, the vicinity of the center of the pillar portion (the portion indicated by the arrow e) is the thinnest. Further, as shown in FIG. 16, when the pillar portion 6 is viewed from the inner diameter side, the tip of the pillar portion (the portion indicated by the arrow f) is the thinnest.

また、保持器４は、軸受への組立後、ころ３が脱落すること、具体的には内輪１の端部側の小つば１ｂを超えてころ３が落ちることが無いように設計されている。すなわち、ころ３と持器４の柱部７との間のすきまを管理し、小つば１ｂところ３とが干渉する寸法とすることで、ころ３が脱落がないよう設定している。図で示すと、図１８の○印で囲んだ部分が干渉するよう設定されている。 Further, the cage 4 is designed so that the roller 3 does not fall off after assembling to the bearing, specifically, the roller 3 does not fall beyond the small brim 1b on the end side of the inner ring 1. .. That is, the gap between the roller 3 and the pillar portion 7 of the holding device 4 is managed, and the size is set so that the small brim 1b and 3 interfere with each other so that the roller 3 does not fall off. As shown in the figure, the portions circled in FIG. 18 are set to interfere with each other.

このため、保持器４へのころ３の組み込みの際は、図１８に破線で柱部７の変形形状を示すように、ころ３が小つば１ｂを乗り越える程度に、保持器４を変形させる必要がある。このように変形させるため、保持器４の形状の崩れ、例えば円筒度の崩れ等が懸念される。
鉄や黄銅を使用した保持器を変形させるには相応の力が必要であり、風力発電機向けなどの大型の軸受（大型の保持器）になるほど作業者への負担が大きくなる。 Therefore, when incorporating the roller 3 into the cage 4, it is necessary to deform the cage 4 to the extent that the roller 3 gets over the small brim 1b, as shown by the broken line in FIG. 18 showing the deformed shape of the pillar portion 7. There is. Since it is deformed in this way, there is a concern that the shape of the cage 4 may collapse, for example, the cylindricity may collapse.
A certain amount of force is required to deform a cage made of iron or brass, and the larger the bearing (larger cage) for wind power generators, the greater the burden on the operator.

なお、特許文献１には、ころ軸受のころ挿入方法及びころ軸受において、ころの組み込み傷を無くす方法が提案されている。しかし、専用治具が必要になる。
特許文献２には、保持器付き自動調心ころ軸受において、保持器柱の長さを変更し、入れ溝を設けることが組み込み性を向上させることが提案されている。しかし、入れ溝の加工が必要になる。
なお、特許文献３には、複列自動調心ころ軸受において、保持器柱の先端部の外径部を切り落としてテーパー形状とした図が示されている。しかし、テーパー形状とした部分の技術的意義の記載はなく、柱部のポケット内面の形状や柱部先端部幅等についての記載もない。ころの組み込みに関しては、内輪に入れ溝を設けて対処することが記載されている。 In addition, Patent Document 1 proposes a roller insertion method for roller bearings and a method for eliminating roller built-in scratches in roller bearings. However, a special jig is required.
Patent Document 2 proposes that in a self-aligning roller bearing with a cage, changing the length of the cage column and providing a groove improves the assembling property. However, it is necessary to process the groove.
In addition, Patent Document 3 shows a figure in which the outer diameter portion of the tip end portion of the cage column is cut off to form a tapered shape in the double row self-aligning roller bearing. However, there is no description of the technical significance of the tapered portion, and there is no description of the shape of the inner surface of the pocket of the pillar portion, the width of the tip portion of the pillar portion, or the like. Regarding the incorporation of rollers, it is described that a groove is provided in the inner ring to deal with it.

また、自動調心ころ軸受において、軽量化が求められている。特に、風力発電機用軸受など、大型軸受になると重量大となる為、軸受全体の軽量化が求められる。このため、その各構成部品に軽量化が求められ、保持器においても軽量化が求められる。 Further, the weight of the self-aligning roller bearing is required to be reduced. In particular, large bearings such as bearings for wind power generators are heavy, so it is required to reduce the weight of the entire bearing. Therefore, the weight of each component is required to be reduced, and the weight of the cage is also required to be reduced.

この発明は、上記課題を解消するものであり、その目的は、ころの保持性能を低下させることなく、ころの組み込み性の向上、ころ組み込み時の保持器変形による形状の崩れの防止、および軽量化を図ることの出来る自動調心ころ軸受用くし型保持器、並びに自動調心ころ軸受を提供することである。 The present invention solves the above problems, and an object of the present invention is to improve the roller assembling property without deteriorating the roller holding performance, to prevent the shape from collapsing due to deformation of the cage during roller assembling, and to reduce the weight. It is an object of the present invention to provide a comb-shaped cage for self-aligning roller bearings and a self-aligning roller bearing that can be changed.

この発明の自動調心ころ軸受用くし型保持器は、複列の自動調心ころ軸受に用いられ、軸方向位置が両列の軌道面間に位置する環状部と、この環状部の周方向複数箇所から軸方向に突出する複数の柱部とでくし型に形成され、隣合う柱部間に樽形のころを保持するポケットが形成された自動調心ころ軸受用くし型保持器であって、
前記各柱部の前記ポケットを構成する面であるポケット内面が、前記軌道面の溝形状最深部の保持器半径方向に垂直な方向に延びる円筒面であり、
前記環状部の外径が前記ころの配列のピッチ円直径ＰＣＤよりも大きく、前記環状部の内径が前記ピッチ円直径ＰＣＤよりも小さく、
前記各柱部の先端の外径面に、最先端に至るに従って保持器内径側に下がるテーパー形状部が形成され、前記テーパー形状部は、前記ころの最大径となる保持器軸方向位置上またはこの軸方向位置よりも柱部先端側から始まり、
前記各柱部を保持器半径方向の外方から保持器中心側に見た柱部幅が、前記柱部の最先端で最も狭くなる。 The comb-shaped cage for self-aligning roller bearings of the present invention is used for double-row self-aligning roller bearings, and has an annular portion whose axial position is located between the raceway surfaces of both rows and the circumferential direction of the annular portion. It is a comb-shaped cage for self-aligning roller bearings that is formed in a comb shape with multiple pillars protruding in the axial direction from multiple locations and has pockets for holding barrel-shaped rollers between adjacent pillars. hand,
The inner surface of the pocket, which is a surface forming the pocket of each of the pillars, is a cylindrical surface extending in a direction perpendicular to the radial direction of the cage at the deepest groove shape of the raceway surface.
The outer diameter of the annular portion is larger than the pitch circle diameter PCD of the arrangement of the rollers, and the inner diameter of the annular portion is smaller than the pitch circle diameter PCD.
A tapered shape portion is formed on the outer diameter surface of the tip of each pillar portion so as to reach the tip end toward the inner diameter side of the cage, and the tapered shape portion is located on the cage axial position having the maximum diameter of the roller. Starting from the tip side of the pillar from this axial position,
The width of each pillar as seen from the outside in the radial direction of the cage toward the center of the cage is the narrowest at the tip of the pillar.

この構成によると、柱部のポケット内面が円筒面であるため、ころの確実な保持が行える。柱部のポケット内面となる円筒面の中心は、内輪軌道面の溝形状最深部の保持器半径方向に垂直な方向に延びているため、柱部が延びる方向に対して先端側が内径側へ傾斜し、従来品のように前記傾斜部がなければ、柱部を保持器半径方向の外方から保持器中心側に見た柱部幅が、前記柱部の最先端で最も広くなる。そのため、この広くなった柱部先端の外径部で阻害されてポケット内へのころの組み込みが行い難く、またその広い柱部先端の外径部が、強度や機能的に良い影響を持たない無駄部分となる。
この発明は、柱部先端の外径面に、保持器内径側に下がるテーパー形状部を形成することで、前記の機能的に良い影響を持たず、またころの組み込みを阻害する無駄部分を省いたため、ころの組み込み性が向上し、かつ保持器の軽量化が得られる。ころの組み込み性が向上するため、組み込み時に保持器を大きく変形させる必要がなく、保持器の変形による形状の崩れが防止される。
前記テーパー形状部は、前記ころの最大径となる保持器軸方向位置上またはこの軸方向位置よりも柱部先端側から始まるようにすることで、ころの保持性が確保される。
このように、ころの保持性能を低下させることなく、ころの組み込み性の向上、ころ組み込み時の保持器変形による形状の崩れの防止、および軽量化を図ることが出来る。 According to this configuration, since the inner surface of the pocket of the pillar portion is a cylindrical surface, the rollers can be reliably held. Since the center of the cylindrical surface, which is the inner surface of the pocket of the column portion, extends in the direction perpendicular to the cage radial direction at the deepest groove shape of the inner ring raceway surface, the tip side is inclined toward the inner diameter side with respect to the extending direction of the column portion. However, if there is no inclined portion as in the conventional product, the width of the pillar portion when the pillar portion is viewed from the outside in the radial direction of the cage toward the center side of the cage is the widest at the cutting edge of the pillar portion. Therefore, the outer diameter of the widened tip of the pillar is obstructed and it is difficult to incorporate the roller into the pocket, and the outer diameter of the wide tip of the pillar does not have a positive effect on strength or functionality. It will be a wasteful part.
In the present invention, by forming a tapered shape portion that goes down to the inner diameter side of the cage on the outer diameter surface of the tip of the pillar portion, the above-mentioned functionally good influence is not exerted, and a waste portion that hinders the incorporation of rollers is eliminated. Therefore, the ease of incorporation of the rollers is improved and the weight of the cage can be reduced. Since the roller can be easily incorporated, it is not necessary to significantly deform the cage during assembly, and the shape of the cage is prevented from being deformed due to the deformation of the cage.
The roller retention is ensured by starting the tapered shape portion on the cage axial position which is the maximum diameter of the roller or from the column tip side of the axial position.
In this way, it is possible to improve the assembling property of the roller, prevent the shape from being deformed due to the deformation of the cage at the time of assembling the roller, and reduce the weight without deteriorating the holding performance of the roller.

この発明の自動調心ころ軸受用くし型保持器において、前記柱部が前記環状部から前記軸方向の片側のみに突出する構成であってもよい。
環状部から柱部が軸方向の両方に延びるくし型保持器であってもよいが、柱部が片側のみに突出する構成とすることで、大型の自動調心ころ軸受に適用する場合等に、取扱性が良い。 In the comb-shaped cage for self-aligning roller bearings of the present invention, the pillar portion may be configured to protrude from the annular portion to only one side in the axial direction.
A comb-shaped cage in which the column portion extends from the annular portion in both axial directions may be used, but when the column portion is configured to protrude only on one side, it is applied to a large self-aligning roller bearing, etc. , Easy to handle.

この発明自動調心ころ軸受用くし型保持器において、前記環状部の外径が前記ピッチ円直径ＰＣＤに対して、
ＰＣＤ×１０２〜１０５％、
前記環状部の内径が前記ピッチ円直径ＰＣＤに対して、
ＰＣＤ×９５〜９８％、
前記柱部の前記ポケットを構成する部分の長さがころ長さの６５％以下、
であってもよい。
柱部のポケット構成部分の長さがころ長さの６５％以下であると、前記テーパー形状部を形成しない従来品に比べ保持器の性能が劣らぬよう、保持器が主にころを抱えている位置（ころ最大径位置）のポケット内面を確保しつつ、保持器容積が最小となる設計とできる。その場合、保持器外径はＰＣＤ×１０２〜１０５％、環状部の内径はＰＣＤ×９５〜９８％となる。 In the comb-shaped cage for self-aligning roller bearings of the present invention, the outer diameter of the annular portion is relative to the pitch circular diameter PCD.
PCD x 102-105%,
The inner diameter of the annular portion is relative to the pitch circle diameter PCD.
PCD x 95-98%,
The length of the portion of the pillar portion constituting the pocket is 65% or less of the roller length.
It may be.
If the length of the pocket component of the pillar is 65% or less of the roller length, the cage mainly holds the rollers so that the performance of the cage is not inferior to that of the conventional product that does not form the tapered shape. It can be designed to minimize the cage volume while ensuring the inner surface of the pocket at the position (maximum roller diameter position). In that case, the outer diameter of the cage is PCD × 102 to 105%, and the inner diameter of the annular portion is PCD × 95 to 98%.

この発明の自動調心ころ軸受用くし型保持器において、鉄系材料で構成されていてもよい。
鉄系材料であると堅固である反面、通常では、ころの組み込みのために保持器を変形させるには相応の力が必要である。そのため、この発明の前記テーパー形状部を形成したことによる組み込み性の向上効果が効果的に発揮される。 The comb-shaped cage for self-aligning roller bearings of the present invention may be made of an iron-based material.
While iron-based materials are tough, they usually require a reasonable amount of force to deform the cage for the incorporation of rollers. Therefore, the effect of improving the assembling property by forming the tapered shape portion of the present invention is effectively exhibited.

この発明の自動調心ころ軸受用くし型保持器において、黄銅系材料で構成されていてもよい。
黄銅系材料の場合も、通常では、ころの組み込みのために保持器を変形させるには相応の力が必要である。そのため、この発明の前記テーパー形状部を形成したことによる組み込み性の向上効果が効果的に発揮される。 The comb-shaped cage for self-aligning roller bearings of the present invention may be made of a brass-based material.
Even in the case of brass-based materials, a certain amount of force is usually required to deform the cage for incorporating the rollers. Therefore, the effect of improving the assembling property by forming the tapered shape portion of the present invention is effectively exhibited.

この発明の自動調心ころ軸受は、この発明の上記いずれかの構成の自動調心ころ軸受用くし型保持器が用いられている。
この発明の自動調心ころ軸受用くし型保持器を用いたことで、軸受全体の軽量化と、ころ組み込み時の保持器の形状崩れのない信頼性の高い性能とが得られる。 As the self-aligning roller bearing of the present invention, a comb-shaped cage for a self-aligning roller bearing having any of the above configurations of the present invention is used.
By using the comb-shaped cage for self-aligning roller bearings of the present invention, it is possible to obtain weight reduction of the entire bearing and highly reliable performance without losing the shape of the cage when the rollers are assembled.

この発明の自動調心ころ軸受は、風力発電機の主軸の支持用に用いられる軸受であってもよい。
風力発電機は大型であるほど発電の効率が良く、大型化が進んでいるが、このような大型の風力発電機の主軸の支持に用いられる軸受は、必然的に大型となる。そのため、軸受全体の軽量化と、保持器へのころ組み込みの際の形状崩れの防止がより重要となるが、この発明の自動調心ころ軸受用くし型保持器が用いられることで、これら軽量化と組み込み性の両方の課題が解消される。 The self-aligning roller bearing of the present invention may be a bearing used for supporting a spindle of a wind power generator.
The larger the wind power generator, the more efficient the power generation and the larger the size of the wind power generator. However, the bearing used to support the spindle of such a large wind power generator is inevitably large. Therefore, it is more important to reduce the weight of the bearing as a whole and prevent the shape from collapsing when the rollers are incorporated into the cage. However, by using the comb-shaped cage for the self-aligning roller bearing of the present invention, these weights are reduced. The issues of both conversion and embedding are solved.

この発明の自動調心ころ軸受用くし型保持器は、複列の自動調心ころ軸受に用いられ、軸方向位置が両列の軌道面間に位置する環状部と、この環状部の周方向複数箇所から軸方向に突出する複数の柱部とでくし型に形成され、隣合う柱部間に樽形のころを保持するポケットが形成された自動調心ころ軸受用くし型保持器であって、前記各柱部の前記ポケットを構成する面であるポケット内面が、前記内輪の軌道面の溝形状最深部の保持器半径方向に垂直な方向に延びる円筒面であり、前記環状部の外径が前記ころの配列のピッチ円直径ＰＣＤよりも大きく、前記環状部の内径が前記ピッチ円直径ＰＣＤよりも小さく、前記各柱部の先端の外径面に、最先端に至るに従って保持器内径側に下がるテーパー形状部が形成され、前記テーパー形状部は、前記ころの最大径となる保持器軸方向位置上またはこの軸方向位置よりも柱部先端側から始まり、前記各柱部を保持器半径方向の外方から保持器中心側に見た柱部幅が、前記柱部の最先端で最も狭くなるため、ころの保持性能を低下させることなく、ころの組み込み性の向上、ころ組み込み時の保持器変形による形状の崩れの防止、および軽量化を図ることができる。 The comb-shaped cage for self-aligning roller bearings of the present invention is used for double-row self-aligning roller bearings, and has an annular portion whose axial position is located between the raceway surfaces of both rows and the circumferential direction of the annular portion. It is a comb-shaped cage for self-aligning roller bearings that is formed in a comb shape with multiple pillars protruding in the axial direction from multiple locations and has pockets for holding barrel-shaped rollers between adjacent pillars. The inner surface of the pocket, which is the surface forming the pocket of each of the pillars, is a cylindrical surface extending in a direction perpendicular to the radial direction of the cage at the deepest groove shape of the raceway surface of the inner ring, and is outside the annular portion. The diameter is larger than the pitch circle diameter PCD of the arrangement of the rollers, the inner diameter of the annular portion is smaller than the pitch circle diameter PCD, and the inner diameter of the cage is on the outer diameter surface of the tip of each pillar portion as it reaches the cutting edge. A tapered shape portion that descends to the side is formed, and the tapered shape portion starts on the position in the axial direction of the cage that is the maximum diameter of the roller or from the tip side of the pillar portion with respect to the axial position of the cage, and holds each pillar portion in the cage. Since the width of the column as seen from the outside in the radial direction toward the center of the cage is the narrowest at the tip of the column, the roller can be easily incorporated without degrading the roller holding performance. It is possible to prevent the shape from collapsing due to deformation of the cage and to reduce the weight.

この発明の自動調心ころ軸受は、この発明の自動調心ころ軸受用くし型保持器を備えるため、軸受全体の軽量化と、ころ組み込み時の保持器の形状崩れのない信頼性の高い性能とが得られる。 Since the self-aligning roller bearing of the present invention includes the comb-shaped cage for the self-aligning roller bearing of the present invention, the weight of the entire bearing is reduced and the shape of the cage is not deformed when the rollers are assembled. And are obtained.

この発明の一実施形態に係る自動調心ころ軸受の部分破断正面図である。It is a partial fracture front view of the self-aligning roller bearing which concerns on one Embodiment of this invention. 同自動調心ころ軸受のくし型保持器における周方向の一部を示す破断側面図である。It is a breaking side view which shows a part in the circumferential direction in the comb type cage of the self-aligning roller bearing. 同自動調心ころ軸受におけるころの正面図である。It is a front view of the roller in the self-aligning roller bearing. 同くし型保持器の外観斜視図である。It is an external perspective view of the comb type cage. 同保持器の部分平面図である。It is a partial plan view of the cage. 同保持器の部分破断平面図である。It is a partial fracture plan view of the cage. 同保持器の部分拡大平面図である。It is a partially enlarged plan view of the cage. 同自動調心ころ軸受の寸法説明図である。It is a dimensional explanatory drawing of the self-aligning roller bearing. 同くし型保持器の部分斜視図である。It is a partial perspective view of the same comb type cage. 従来のくし型保持器の部分斜視図である。It is a partial perspective view of the conventional comb type cage. 同実施形態に係るくし型保持器の一部を柱部先端側から見た部分側面図である。It is a partial side view which saw a part of the comb type cage which concerns on this embodiment from the tip side of a pillar part. 同従来例に係るくし型保持器の一部を柱部先端側から見た部分側面図である。It is a partial side view which saw a part of the comb-shaped cage which concerns on the prior art example from the tip side of a pillar part. 同実施形態に係る自動調心ころ軸受を用いた風力発電装置の構成説明図である。It is a block diagram of the wind power generation apparatus using the self-aligning roller bearing which concerns on the same embodiment. 従来の自動調心ころ軸受の部分破断正面図である。It is a partially broken front view of the conventional self-aligning roller bearing. 同自動調心ころ軸受のくし型保持器における周方向の一部を示す破断側面図である。It is a breaking side view which shows a part in the circumferential direction in the comb type cage of the self-aligning roller bearing. 同従来のくし型保持器の部分斜視図である。It is a partial perspective view of the conventional comb type cage. 同従来のくし型保持器を外径側から見た部分平面図である。It is a partial plan view which saw the conventional comb type cage from the outer diameter side. 同従来のくし型保持器を内径側から見た部分平面図である。It is a partial plan view which looked at the conventional comb type cage from the inner diameter side. 同従来のくし型保持器を部分断面図である。It is a partial cross-sectional view of the conventional comb type cage. 同従来の自動調心ころ軸受の組み立て上の支障を示す説明図である。It is explanatory drawing which shows the trouble in assembling the conventional self-aligning roller bearing.

この発明の一実施形態に係る複列自動調心ころ軸受およびそのくし型保持器を、図１ないし図１１と共に説明する。
図１に示すように、この複列自動調心ころ軸受１０は、内輪１と外輪２との間に軸方向に並ぶ２列のころ３，３が介在し、各ころ列毎に、保持器４，４によってころ３，３が保持されている。この複列自動調心ころ軸受は左右対称形状であり、両側の保持器４，４は互いに左右対称形状である。
外輪２の軌道面２ａは両列に渡って続く球面状であり、内輪１には、左右各列のころ３，３の外周面に沿う断面形状の軌道面１ａ，１ａが複列に形成されている。内輪１の外周面の両端には、つば（小つば）１ｂ，１ｂがそれぞれ設けられている。内輪１の外周面の中央部、すなわち左列のころ３と右列のころ３間に、中つば１ｃが設けられている。 A double row self-aligning roller bearing and a comb-shaped cage thereof according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11.
As shown in FIG. 1, in this double row self-aligning roller bearing 10, two rows of rollers 3 and 3 arranged in the axial direction are interposed between the inner ring 1 and the outer ring 2, and a cage is provided for each roller row. Rollers 3 and 3 are held by 4 and 4. This double-row self-aligning roller bearing has a symmetrical shape, and the cages 4 and 4 on both sides have a symmetrical shape with each other.
The raceway surface 2a of the outer ring 2 has a spherical shape extending over both rows, and the raceway surfaces 1a and 1a having a cross-sectional shape along the outer peripheral surfaces of the rollers 3 and 3 of the left and right rows are formed in a double row on the inner ring 1. ing. A brim (small brim) 1b, 1b is provided at both ends of the outer peripheral surface of the inner ring 1, respectively. A middle brim 1c is provided at the center of the outer peripheral surface of the inner ring 1, that is, between the rollers 3 in the left row and the rollers 3 in the right row.

各列のころ３，３は、外周面が外輪２の軌道面２ａに沿う断面形状である。言い換えると、ころ３は、外輪２の軌道面２ａに沿った円弧を中心線回りに回転させた回転体形状の曲面に外周面が形成され、いわゆる樽形とされている。ころ３は、ころ長さの中央が最大径となる対称ころであっても、またころ長さの中央に対して最大径の位置がずれた非対処ころであってもよい。図示の例では最大径となる箇所(直線ａ)は、ころ長さの中央(内輪軌道面１ａの幅の中央)よりも軸方向の中央側に、最大径となる箇所(直線ａ)が位置する非対称ころとされている。 The outer peripheral surfaces of the rollers 3 and 3 in each row have a cross-sectional shape along the raceway surface 2a of the outer ring 2. In other words, the roller 3 has an outer peripheral surface formed on a curved surface having a rotating body shape in which an arc along the raceway surface 2a of the outer ring 2 is rotated around the center line, and has a so-called barrel shape. The roller 3 may be a symmetrical roller having a maximum diameter at the center of the roller length, or a non-coping roller whose maximum diameter is displaced from the center of the roller length. In the illustrated example, the maximum diameter portion (straight line a) is located on the axial center side of the center of the roller length (center of the width of the inner ring raceway surface 1a). It is said to be an asymmetrical roller.

保持器４は、軸方向位置が両列の内輪軌道面１ａ，１ａ間に位置する環状部５と、この環状部５の周方向複数箇所から軸方向に突出する複数の柱部６(図６)とでくし型に形成されている。図１のように、両列の保持器４は、環状部５で互いに接するように背合わせに配置され、いずれも環状部５が内輪１の中つば１ｃの外径面で案内される。 The cage 4 includes an annular portion 5 whose axial position is located between the inner ring raceway surfaces 1a and 1a in both rows, and a plurality of pillar portions 6 (FIG. 6) that project axially from a plurality of circumferential positions of the annular portion 5. ) And a comb shape. As shown in FIG. 1, the cages 4 in both rows are arranged back to back so as to be in contact with each other at the annular portion 5, and the annular portions 5 are guided by the outer diameter surface of the inner brim 1c of the inner ring 1.

保持器４の柱部６は、長さ方向の各部が同一の基本断面形状の棒状の部分から、円筒面状のポケット内面６ａ(図２)が除去され、かつ先端にテーパー形状部９が設けられた形状とされている。前記基本断面形状は、それぞれ円筒面の一部を成す外周面および内周面と、半径方向に延びる両側の平面状の側面とでなる形状である。ポケット内面６ａを成す円筒面の直径は、ころ３の最大径よりも僅かに大きな径とされている。
柱部６のポケット７を構成する面であるポケット内面６ａは、中心線ｃが内輪１の軌道面１ａの溝形状最深部の保持器半径方向の直線ａに垂直な方向に延びる円筒面である。前記最深部は、ころ３の最大径を成す長さ方向位置であり、前記直線ａは作用線を成す。 The pillar portion 6 of the cage 4 has a cylindrical pocket inner surface 6a (FIG. 2) removed from a rod-shaped portion having the same basic cross-sectional shape in each length direction, and a tapered portion 9 is provided at the tip thereof. It is said to have a shaped shape. The basic cross-sectional shape is a shape including an outer peripheral surface and an inner peripheral surface forming a part of a cylindrical surface, and planar side surfaces on both sides extending in the radial direction. The diameter of the cylindrical surface forming the pocket inner surface 6a is slightly larger than the maximum diameter of the roller 3.
The pocket inner surface 6a, which is a surface forming the pocket 7 of the pillar portion 6, is a cylindrical surface whose center line c extends in a direction perpendicular to the straight line a in the radial direction of the cage at the deepest groove shape of the raceway surface 1a of the inner ring 1. .. The deepest portion is a position in the length direction forming the maximum diameter of the roller 3, and the straight line a forms an action line.

保持器４の外径、内径、幅寸法は、次のように最適化されている。
保持器４の環状部５の外径Ｄｏは、ころ３の配列のピッチ円直径ＰＣＤよりも大きく、環状部５の内径Ｄｉはピッチ円直径ＰＣＤよりも小さい。
環状部５の外径Ｄｏは、例えば、ＰＣＤ×１０２〜１０５％、である。
環状部５の内径Ｄｉは、例えば、ＰＣＤ×９５〜９８％、である。
柱部６の長さＬ、詳しくは柱部６のポケット７を構成する部分の長さＬは、ころ長さＬ１（図３）の６５％以下とされている。 The outer diameter, inner diameter, and width of the cage 4 are optimized as follows.
The outer diameter Do of the annular portion 5 of the cage 4 is larger than the pitch circle diameter PCD of the arrangement of the rollers 3, and the inner diameter Di of the annular portion 5 is smaller than the pitch circle diameter PCD.
The outer diameter Do of the annular portion 5 is, for example, PCD × 102 to 105%.
The inner diameter Di of the annular portion 5 is, for example, PCD × 95 to 98%.
The length L of the pillar portion 6, specifically, the length L of the portion forming the pocket 7 of the pillar portion 6 is 65% or less of the roller length L1 (FIG. 3).

前記テーパー形状部９(図４〜図９Ａ)は、柱部６の先端の外径面に、最先端に至るに従って保持器内径側に下がるように形成されている。テーパー形状部９は、ころ３の最大径となる保持器軸方向位置(直線ａの位置)上、またはこの軸方向位置よりも柱部先端側から始まる。
柱部６に前記テーパー形状部９が形成され、かつ円筒面状のポケット内面６ａが柱部６が延びる軸方向に対して傾斜していることで、柱部６を保持器半径方向の外方から保持器中心側に見た柱部幅は、柱部６の最先端で最も狭く、幅Ｗ１(図７)となっている。また、柱部６の先端面６ｂの径方向寸法ｄ(図８)が小さくなっている。 The tapered shape portion 9 (FIGS. 4 to 9A) is formed on the outer diameter surface of the tip of the pillar portion 6 so as to be lowered toward the inner diameter side of the cage toward the most advanced end. The tapered shape portion 9 starts on the cage axial position (position of the straight line a) which is the maximum diameter of the roller 3, or from the column portion tip side of the axial position.
The tapered shape portion 9 is formed on the pillar portion 6, and the cylindrical pocket inner surface 6a is inclined with respect to the axial direction in which the pillar portion 6 extends, so that the pillar portion 6 is outward in the radial direction of the cage. The width of the pillar portion seen from the center side of the cage is the narrowest at the tip of the pillar portion 6 and has a width W1 (FIG. 7). Further, the radial dimension d (FIG. 8) of the tip surface 6b of the pillar portion 6 is reduced.

材質例を説明すると、内輪１、外輪２、およびころ３は、軸受鋼製であり、保持器４には鉄系材料または黄銅系材料が用いられている。 Explaining the material example, the inner ring 1, the outer ring 2, and the roller 3 are made of bearing steel, and the cage 4 is made of an iron-based material or a brass-based material.

この自動調心ころ軸受用くし型保持器４は、軽量化・組み込み性改善のために、保持器４の寸法を最小限にし、機能に影響しない部分を除去した設計とした。その結果、保持器４の内径・外径・幅寸法を最適化し、且つ保持器４の柱部６の先端部分を斜めに切り落としテーパー形状部９とした。
保持器４の性能は落とさずに最適設計とするため、以下の寸法関係とした。
軽量化のためにコンパクト化設計、且つ組込み後にころ３が脱落しないようにするため、ＦＭＥを用い軸受組立状態を再現することで、ころ３の脱落のない最適設計となる保持器内径・外径寸法を前記のように決定した。 The comb-shaped cage 4 for self-aligning roller bearings is designed to minimize the dimensions of the cage 4 and remove parts that do not affect the function in order to reduce weight and improve ease of incorporation. As a result, the inner diameter, outer diameter, and width of the cage 4 were optimized, and the tip portion of the pillar portion 6 of the cage 4 was cut off diagonally to form a tapered shape portion 9.
In order to optimize the design of the cage 4 without degrading the performance, the following dimensional relationships were used.
Compact design for weight reduction, and to prevent the roller 3 from falling off after installation, by reproducing the bearing assembly state using FME, the inner and outer diameters of the cage will be the optimum design without the roller 3 falling off. The dimensions were determined as described above.

また、従来品に比べ保持器４の性能が劣らぬよう、保持器４が主にころ３を抱えている位置（ころ最大径位置）のポケット寸法を確保しつつ最小設計とするため、保持器４の柱部６の長さＬ（ポケット部幅寸法）を、前記のように、ころ３の長さ×６５％以下とした。
その結果、ころ配列のピッチ円直径ＰＣＤに対して、前記のように、
円環部５の外径は、ＰＣＤ×１０２〜１０５％、
環状部５の内径は、ＰＣＤ×９５〜９８％、
となる。 In addition, in order to ensure that the performance of the cage 4 is not inferior to that of the conventional product, the cage 4 is designed to be the minimum while ensuring the pocket size at the position where the roller 3 is mainly held (maximum roller diameter position). The length L (pocket width dimension) of the pillar portion 6 of 4 is set to the length of the roller 3 × 65% or less as described above.
As a result, with respect to the pitch circle diameter PCD of the roller arrangement, as described above,
The outer diameter of the annulus 5 is PCD × 102 to 105%,
The inner diameter of the annular portion 5 is PCD × 95 to 98%,
Will be.

また、保持器４の柱部６の中で、ころ保持性能及びころ脱落性能に関わらない部分をそぎ落とすことで軽量化し、かつころ組込時の入り口の寸法を極力広くし、組込み性を向上させるために、前記のように保持器４の柱部６の先端部分を外径側から斜めに切り落としたテーパー形状９とした。
このテーパー形状部９は、ころ保持性に関わるころ最大径位置(直線ａの位置)、またはそれよりも柱先端側から開始することで、ころ保持性を確保している。
テーパー形状部９は、傾斜角度が大きいほど先端部分の周方向幅Ｗが狭くなり、かつ径方向厚ｄが薄くなって、ころ組込時の入り口が広くなる為、組み込みの際に必要な柱部６の変形量が減り、組み込み性が向上する。しかし加工面では、保持器４の柱部６の先端のストレート面にドリルを当てて加工を進める為、平面を残す必要がある。その為テーパー形状部９の傾斜角度は、加工に支障のない最大角度で設定すべきである。
上記を満たす保持器４とした結果、保持器４の形状は、柱部６を外径側から見た状態で、柱部６の先端が最も狭い形状となる。 In addition, the weight is reduced by removing the part of the pillar 6 of the cage 4 that is not related to the roller holding performance and the roller dropping performance, and the size of the entrance when the roller is assembled is made as wide as possible to improve the ease of incorporation. In order to make the shape 9 as described above, the tip portion of the pillar portion 6 of the cage 4 is cut off diagonally from the outer diameter side.
The tapered shape portion 9 secures the roller holding property by starting from the roller maximum diameter position (the position of the straight line a) related to the roller holding property or the column tip side from the position.
As the inclination angle of the tapered shape portion 9 becomes larger, the circumferential width W of the tip portion becomes narrower and the radial thickness d becomes thinner, and the entrance at the time of roller assembling becomes wider. The amount of deformation of the portion 6 is reduced, and the ease of incorporation is improved. However, on the machined surface, it is necessary to leave a flat surface because the drill is applied to the straight surface at the tip of the pillar portion 6 of the cage 4 to proceed with the machining. Therefore, the inclination angle of the tapered shape portion 9 should be set to the maximum angle that does not interfere with machining.
As a result of forming the cage 4 satisfying the above, the shape of the cage 4 is such that the tip of the pillar portion 6 is the narrowest when the pillar portion 6 is viewed from the outer diameter side.

従来の保持器４では、図９Ｂ、図１０Ｂに示すように、保持器ポケット７の入り口の保持器先端面６ｂ（網点部）が大であった。この実施形態の保持器４（図９Ａ、図１０Ａ）では先端を切り取ってテーパー形状部９とすることで、保持器ポケット部入り口の柱先端面６ｂ（網点部）が従来品の柱先端面６ｂ（図９Ｂ、図１０Ｂ）よりも小さくなっており、組み込み性が向上している。 In the conventional cage 4, as shown in FIGS. 9B and 10B, the cage tip surface 6b (halftone dot portion) at the entrance of the cage pocket 7 is large. In the cage 4 (FIGS. 9A and 10A) of this embodiment, the tip is cut off to form a tapered shape portion 9, so that the pillar tip surface 6b (halftone dot portion) at the entrance of the cage pocket is the pillar tip surface of the conventional product. It is smaller than 6b (FIGS. 9B and 10B), and the ease of incorporation is improved.

以上のように、この構成によると、次の各利点が得られる。
・保持器４の各部の寸法を最適化したことで最小限の断面となり、保持器４の軽量化となる。
・保持器４の柱部６の先端部における機能に影響しない部分を切り落とし、先端部をテーパー形状部９としたため、保持器４の軽量化となる
・保持器４の柱部６の先端の機能に影響しない部分を外径側からテーパー形状に切り落とし、テーパー形状部９としたため、保持器４の柱部６の先端の面積が減り、組立時にころ３と干渉する入り口部分の寸法が広がる。その為、ころ３の組み込み性が向上し、軸受組立の工数の削減、組立作業者の負担軽減が図れる。組み込み性の向上により、組み込み時に保持器４を大きく変形させる必要がなく、無理に形状変更させることによる保持器４の形状崩れを最小限に抑えることができる。 As described above, according to this configuration, the following advantages are obtained.
-By optimizing the dimensions of each part of the cage 4, the cross section is minimized and the weight of the cage 4 is reduced.
-Since the portion of the tip of the pillar 6 of the cage 4 that does not affect the function is cut off and the tip is made into a tapered shape portion 9, the weight of the cage 4 is reduced.-The function of the tip of the pillar 6 of the cage 4 Since the portion that does not affect the outer diameter is cut off from the outer diameter side into a tapered shape to form the tapered shape portion 9, the area of the tip of the pillar portion 6 of the cage 4 is reduced, and the size of the entrance portion that interferes with the roller 3 during assembly is increased. Therefore, the assembling property of the roller 3 is improved, the man-hours for assembling the bearing can be reduced, and the burden on the assembling worker can be reduced. Due to the improved ease of incorporation, it is not necessary to significantly deform the cage 4 at the time of assembly, and it is possible to minimize the shape collapse of the cage 4 due to forcibly changing the shape.

図１１は、風力発電装置の主軸支持装置の一例を示す。支持台２１上に旋回座軸受２２を介してナセル２３のケーシング２３ａが水平旋回自在に設置されている。ナセル２３のケーシング２３ａ内には、軸受ハウジング２４に設置された主軸支持軸受２５を介して主軸２６が回転自在に設置され、主軸２６のケーシング２３ａ外に突出した部分に、旋回翼となるブレード２７が取り付けられている。主軸支持軸受２５に、前記実施形態に係る複列自動調心ころ軸受１０が適用される。
主軸２６の他端は、増速機２８に接続され、増速機２８の出力軸が発電機２９のロータ軸に結合されている。ナセル２３は、旋回用モータ３０により、減速機３１を介して任意の角度に旋回させられる。主軸支持軸受２５は、図示の例では２個並べて設置してあるが、１個であっても良い。 FIG. 11 shows an example of a spindle support device of a wind power generation device. The casing 23a of the nacelle 23 is horizontally swivelly installed on the support base 21 via the swivel bearing 22. The spindle 26 is rotatably installed in the casing 23a of the nacelle 23 via the spindle support bearing 25 installed in the bearing housing 24, and the blade 27 serving as a swivel blade is located in a portion of the spindle 26 protruding outside the casing 23a. Is installed. The double row self-aligning roller bearing 10 according to the embodiment is applied to the spindle support bearing 25.
The other end of the spindle 26 is connected to the speed increaser 28, and the output shaft of the speed increaser 28 is coupled to the rotor shaft of the generator 29. The nacelle 23 is swiveled at an arbitrary angle by the swivel motor 30 via the speed reducer 31. Although two spindle support bearings 25 are installed side by side in the illustrated example, one spindle support bearing 25 may be used.

風力発電機は大型であるほど発電の効率が良く、大型化が進んでいるが、このような大型の風力発電機の主軸の支持に用いられる軸受は、必然的に大型となる。そのため、軸受全体の軽量化と、保持器へのころ組み込みの際の形状崩れの防止がより重要となるが、この実施形態の自動調心ころ軸受用くし型保持器４が用いられることで、これら軽量化と組み込み性の両方の課題が解消される。 The larger the wind power generator, the more efficient the power generation and the larger the size of the wind power generator. However, the bearing used to support the spindle of such a large wind power generator is inevitably large. Therefore, it is more important to reduce the weight of the bearing as a whole and prevent the shape from collapsing when the roller is incorporated into the cage. However, by using the comb-shaped cage 4 for the self-aligning roller bearing of this embodiment, These issues of both weight reduction and incorporateability are solved.

以上、実施例に基づいて本発明を実施するための形態を説明したが、ここで開示した実施の形態はすべての点で例示であって制限的なものではない。本発明の範囲は上記した説明ではなくて特許請求の範囲によって示され、特許請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 Although the embodiments for carrying out the present invention have been described above based on the examples, the embodiments disclosed here are examples in all respects and are not restrictive. The scope of the present invention is shown by the scope of claims rather than the above description, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims.

１…内輪
１ａ…軌道面
１ｂ…小つば
１ｃ…中つば
２…外輪
２ａ…軌道面
３…ころ
４…保持器
５…環状部
６…柱部
６a…ポケット内面
７…ポケット
９…テーパー形状部
１０…自動調心ころ軸受
ＰＣＤ…ピッチ円直径 1 ... Inner ring 1a ... Track surface 1b ... Small brim 1c ... Middle brim 2 ... Outer ring 2a ... Track surface 3 ... Roller 4 ... Cage 5 ... Ring part 6 ... Pillar part 6a ... Pocket inner surface 7 ... Pocket 9 ... Tapered shape part 10 … Self-aligning roller bearing PCD… Pitch circle diameter

Claims (7)

複列の自動調心ころ軸受に用いられ、軸方向位置が両列の軌道面間に位置する環状部と、この環状部の周方向複数箇所から軸方向に突出する複数の柱部とでくし型に形成され、隣合う柱部間に樽形のころを保持するポケットが形成された自動調心ころ軸受用くし型保持器であって、
前記各柱部の前記ポケットを構成する面であるポケット内面が、前記内輪の軌道面の溝形状最深部の保持器半径方向に垂直な方向に延びる円筒面であり、
前記環状部の外径が前記ころの配列のピッチ円直径ＰＣＤよりも大きく、前記環状部の内径が前記ピッチ円直径ＰＣＤよりも小さく、
前記各柱部の先端の外径面に、最先端に至るに従って保持器内径側に下がるテーパー形状部が形成され、前記テーパー形状部は、前記ころの最大径となる保持器軸方向位置上またはこの軸方向位置よりも柱部先端側から始まり、
前記各柱部を保持器半径方向の外方から保持器中心側に見た柱部幅が、前記柱部の最先端で最も狭くなる、
自動調心ころ軸受用くし型保持器。 It is used for double-row self-aligning roller bearings, and has an annular portion whose axial position is located between the raceway surfaces of both rows, and a plurality of column portions that project axially from multiple locations in the circumferential direction of this annular portion. A comb-shaped cage for self-aligning roller bearings, which is formed in a mold and has pockets for holding barrel-shaped rollers between adjacent columns.
The inner surface of the pocket, which is the surface forming the pocket of each of the pillars, is a cylindrical surface extending in a direction perpendicular to the radial direction of the cage at the deepest groove shape of the raceway surface of the inner ring.
The outer diameter of the annular portion is larger than the pitch circle diameter PCD of the arrangement of the rollers, and the inner diameter of the annular portion is smaller than the pitch circle diameter PCD.
A tapered shape portion is formed on the outer diameter surface of the tip of each pillar portion so as to reach the tip end toward the inner diameter side of the cage, and the tapered shape portion is located on the cage axial position having the maximum diameter of the roller. Starting from the tip side of the pillar from this axial position,
The width of each pillar as seen from the outside in the radial direction of the cage toward the center of the cage is the narrowest at the tip of the pillar.
Comb cage for self-aligning roller bearings. 請求項１に記載の自動調心ころ軸受用くし型保持器において、前記柱部が前記環状部から前記軸方向の片側のみに突出する自動調心ころ軸受用くし型保持器。 The comb-shaped cage for a self-aligning roller bearing according to claim 1, wherein the pillar portion projects from the annular portion to only one side in the axial direction. 請求項１または請求項２に記載の自動調心ころ軸受用くし型保持器において、前記環状部の外径が前記ピッチ円直径ＰＣＤに対して、
ＰＣＤ×１０２〜１０５％、
前記環状部の内径が前記ピッチ円直径ＰＣＤに対して、
ＰＣＤ×９５〜９８％、
前記柱部の前記ポケットを構成する部分の長さがころ長さの６５％以下、
である自動調心ころ軸受用くし型保持器。 In the comb-shaped cage for self-aligning roller bearings according to claim 1 or 2, the outer diameter of the annular portion is relative to the pitch circle diameter PCD.
PCD x 102-105%,
The inner diameter of the annular portion is relative to the pitch circle diameter PCD.
PCD x 95-98%,
The length of the portion of the pillar portion constituting the pocket is 65% or less of the roller length.
Comb cage for self-aligning roller bearings. 請求項１ないし請求項３のいずれか１項に記載の自動調心ころ軸受用くし型保持器において、鉄系材料で構成されている自動調心ころ軸受用くし型保持器。 The comb-shaped cage for self-aligning roller bearings according to any one of claims 1 to 3, wherein the comb-shaped cage for self-aligning roller bearings is made of an iron-based material. 請求項１ないし請求項３のいずれか１項に記載の自動調心ころ軸受用くし型保持器において、黄銅系材料で構成されている自動調心ころ軸受用くし型保持器。 The comb-shaped cage for self-aligning roller bearings according to any one of claims 1 to 3, wherein the comb-shaped cage for self-aligning roller bearings is made of a brass-based material. 請求項１ないし請求項５のいずれか１項に記載の自動調心ころ軸受用くし型保持器が用いられた自動調心ころ軸受。 A self-aligning roller bearing using the comb-shaped cage for self-aligning roller bearings according to any one of claims 1 to 5. 請求項６に記載の自動調心ころ軸受において、風力発電機の主軸の支持用に用いられる自動調心ころ軸受。 The self-aligning roller bearing according to claim 6, which is used for supporting the spindle of a wind power generator.
JP2019062305A 2019-03-28 2019-03-28 Comb-shaped cage for self-aligning roller bearing and self-aligning roller bearing Pending JP2020159533A (en)

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