JP2006090429A

JP2006090429A - Roller with retainer

Info

Publication number: JP2006090429A
Application number: JP2004276658A
Authority: JP
Inventors: Shinji Oishi; 真司大石
Original assignee: NTN Corp; NTN Toyo Bearing Co Ltd
Current assignee: NTN Corp
Priority date: 2004-09-24
Filing date: 2004-09-24
Publication date: 2006-04-06

Abstract

<P>PROBLEM TO BE SOLVED: To provide a roller with a retainer of high load capacity type capable of preventing skewing of the roller and having excellent oil passing property. <P>SOLUTION: This retainer 1 of the roller with the retainer is provided with a roller retaining claw 7 bent and extending by protruding on an inner side in the axial direction from an inside diameter fringe of collar parts 3, 4 and positioned between adjacent rollers 2 as a coming-off prevention means for preventing the roller 2 from coming off onto an inside diameter side of the retainer. A pocket 6 of the retainer 1 is composed of a large width part 6a having relatively large width in the pereipheral direction and small width parts 6b, 6c having relatively small width in the peripheral direction. A ratio of length LN in the axial direction of the small width parts 6b, 6c to length LW in the axial direction of the large width part 6a, LN/LW, is in a range of 0.7 to 1.3. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

この発明は、一般産業機械に用いられる高負荷容量型の保持器付きころに関するものである。 The present invention relates to a roller with a high load capacity type cage used in general industrial machines.

保持器付きころとして、例えば、特開２０００−１７９５４４号公報（特許文献１）に、図１１に示すような断面Ｍ形の保持器４０を用いたものが記載されている。図示する保持器４０は、ころピッチ円径ＰＣＤより小径の中央環状部４１と、ころピッチ円径ＰＣＤより大径の外方環状部４２と、外方環状部４２の両端から内径側に折り曲げられた一対の鍔部４３とを有している。ころ４４の外方への抜け止めは外方環状部４２で行ない、内方への抜け止めを中央環状部４１で行なっている。すなわち、ポケット４５に突出した係止片４６の幅を、ころ４４の外径よりも僅かに小さくしている。ころ４４の装着は、内径側から、ポケット４５の係止片４６を弾性変形させて行なう。 As a roller with a cage, for example, JP 2000-179544 A (Patent Document 1) describes a roller using a cage 40 having an M-shaped cross section as shown in FIG. The cage 40 shown in the figure is bent from the both ends of the center annular portion 41 having a diameter smaller than the roller pitch circle diameter PCD, the outer annular portion 42 having a diameter larger than the roller pitch circle diameter PCD, and both ends of the outer annular portion 42 to the inner diameter side. And a pair of flanges 43. The rollers 44 are prevented from coming off outward by the outer annular portion 42, and the rollers 44 are prevented from coming inward by the central annular portion 41. That is, the width of the locking piece 46 protruding into the pocket 45 is slightly smaller than the outer diameter of the roller 44. The roller 44 is mounted by elastically deforming the locking piece 46 of the pocket 45 from the inner diameter side.

一般に、限られたスペース内で軸受負荷容量を大きくするには、ころ本数を多くすればよい。しかしながら、図１１に示したような保持器付きころでは、一定のスペース（一定の内径、外径）で保持器４０に組込むころ４４の本数を増加させて行くと、図１１（Ｂ）に示す柱幅寸法ａが小さくなり、加工上の限界が生じてくるのみならず、保持器強度も低下する。 Generally, in order to increase the bearing load capacity within a limited space, the number of rollers may be increased. However, in the roller with cage as shown in FIG. 11, when the number of rollers 44 incorporated in the cage 40 is increased in a certain space (constant inner diameter, outer diameter), it is shown in FIG. The column width dimension “a” is reduced, and not only the processing limit is generated, but also the cage strength is reduced.

特開２００３−１６６５４０号公報（特許文献２）は、多くのころを収容することのできる保持器付きころを開示している。この公報に開示された保持器付きころを図１２〜図１４に示している。図示する保持器付きころは、外方部材５３と内方部材５４とからなる保持器５１、および複数のころ５２を備える。外方部材５３は、ころ配列のピッチ円径ＰＣＤより大径の環状部５３ａと、この環状部５３ａの軸方向両端部を内径側に折り曲げた一対の鍔部５３ｂとを有する。内方部材５４は、ころ配列のピッチ円径ＰＣＤより小径の環状に形成する。これら外方部材５３の環状部５３ａおよび内方部材５４の円周方向複数箇所にポケット５５，５６を設け、外、内の部材５３，５４のポケット５５，５６にわたってころ５２を収容する。 Japanese Patent Laying-Open No. 2003-166540 (Patent Document 2) discloses a roller with a cage that can accommodate many rollers. The rollers with cages disclosed in this publication are shown in FIGS. The illustrated roller with cage includes a cage 51 including an outer member 53 and an inner member 54, and a plurality of rollers 52. The outer member 53 includes an annular portion 53a having a diameter larger than the pitch circle diameter PCD of the roller arrangement, and a pair of flange portions 53b obtained by bending both axial ends of the annular portion 53a to the inner diameter side. The inner member 54 is formed in an annular shape having a smaller diameter than the pitch circle diameter PCD of the roller arrangement. Pockets 55 and 56 are provided at a plurality of circumferential positions of the annular portion 53a of the outer member 53 and the inner member 54, and the rollers 52 are accommodated across the pockets 55 and 56 of the outer and inner members 53 and 54.

上記のように、保持器５１を外方部材５３と内方部材５４の２部品で構成した場合、ポケット間の柱部５７，５８を狭く加工することができて、限られたスペース内で多くのころ５２を収容することができる。また、片方の部材５３を鍔付きとするため、隣接部品と摺接するような場合にも支障が生じない。 As described above, when the cage 51 is composed of two parts, that is, the outer member 53 and the inner member 54, the column portions 57 and 58 between the pockets can be processed narrowly, and there are many in a limited space. The roller 52 can be accommodated. In addition, since one member 53 is provided with a hook, there is no problem even when it comes into sliding contact with an adjacent part.

一方、図１２〜図１４に示すような保持器付きころでは、ころ５２の脱落防止のために、保持器５１が外方部材５３と内方部材５４とで構成されているので、部品点数が増加し、コスト高となる。また、軸受内の空間容積が内方部材５４によって小さくなるため、通油性の面で若干不利になることが予想される。 On the other hand, in the rollers with cages as shown in FIGS. 12 to 14, the cage 51 is composed of the outer member 53 and the inner member 54 in order to prevent the rollers 52 from falling off. Increased and costly. Further, since the space volume in the bearing is reduced by the inner member 54, it is expected that the oil permeability is slightly disadvantageous.

本件出願と同一の出願人は、上記の課題を解決するものとして、特開２００４−１９９２３号公報において、図１５〜図１７に示すような保持器付きころを提案した。図示する保持器付きころは、保持器６１と複数のころ６２とからなる。保持器６１は、互いに軸方向に離れて対面する一対の鍔部６３と、両鍔部６３の外径縁間にわたって円周方向の複数箇所に設けられた柱部６５を有する。保持器６１の隣り合う柱部６５の間のポケット６６にころ６２が収容される。ころ６２の端面に面する鍔部６３の内面上であって隣接するころ６２間に位置する部分に、ころ６２の保持器内径側への抜け止めを行なう抜け止め手段６７が設けられている。抜け止め手段６７は、ステーキング部分からなる突起である。 The same applicant as the present application has proposed a roller with a cage as shown in FIGS. 15 to 17 in Japanese Patent Application Laid-Open No. 2004-19923 as a solution to the above-described problems. The illustrated roller with cage includes a cage 61 and a plurality of rollers 62. The cage 61 has a pair of flange portions 63 facing each other in the axial direction, and column portions 65 provided at a plurality of locations in the circumferential direction across the outer diameter edges of the both flange portions 63. Rollers 62 are accommodated in pockets 66 between adjacent column portions 65 of the cage 61. On the inner surface of the flange portion 63 facing the end surface of the roller 62, a retaining means 67 for retaining the roller 62 toward the inner diameter side of the cage is provided at a portion located between the adjacent rollers 62. The retaining means 67 is a protrusion composed of a staking portion.

図１５〜図１７に示したような保持器付きころの場合、図１２〜図１４に示したものに比べて、通油性の向上および部品点数の削減が可能である。しかしながら、ステーキング部分を成形する際に、保持器鍔部６３の内面側に受け部材を設けることが非常に困難であり、ステーキング部分の寸法が安定しないなど、製造面および品質面で多くの問題が予想される。 In the case of the rollers with cages as shown in FIGS. 15 to 17, the oil permeability can be improved and the number of parts can be reduced as compared with those shown in FIGS. 12 to 14. However, when forming the staking portion, it is very difficult to provide a receiving member on the inner surface side of the cage collar 63, and the dimensions of the staking portion are not stable. A problem is expected.

そこで、本件出願人は、ステーキング部分からなる抜け止め手段６７に代えて、曲げ片状のころ保持爪を設けることを試みた。曲げ片状のころ保持爪は、保持器付きころとは別の形式の軸受、すなわち内外輪を有する外輪外鍔付きの円筒ころ軸受においては提案されている（実開昭５５−４９１４８号公報：特許文献４）。しかしながら、軸とハウジングとに直接にころを転接させる形式の従来の保持器付きころにおいて、上記公報に開示されたような曲げ片状のころ保持爪付きの保持器を適用した例は無い。
特開２０００−１７９５４４号公報（図７）特開２００３−１６６５４０号公報（図１、図２）特開２００４−１９９２３号公報（図１〜図８）実開昭５５−４９１４８号公報 Therefore, the applicant of the present application tried to provide a bent piece-like roller holding claw in place of the retaining means 67 comprising the staking portion. Bending piece-like roller holding claws have been proposed for bearings of a different type from rollers with cages, that is, cylindrical roller bearings with inner and outer rings and outer ring outer flanges (Japanese Utility Model Publication No. 55-49148). Patent Document 4). However, there is no example in which a cage with a bent piece-like roller holding pawl as disclosed in the above publication is applied to a conventional roller with a cage in which a roller is in rolling contact with a shaft and a housing.
JP 2000-179544 A (FIG. 7) JP 2003-166540 A (FIGS. 1 and 2) Japanese Unexamined Patent Application Publication No. 2004-19923 (FIGS. 1 to 8) Japanese Utility Model Publication No. 55-49148

ころの保持器内径側への抜け止め手段として鍔部にころ保持爪を形成する構造の保持器の場合、図１１に示したＭ形保持器と異なり、ころ配列のピッチ円径ＰＣＤ上にころ案内部が存在していないので、ころのスキュー等により保持器の横走りが発生し易くなる。また、ころの本数が多くなるために、Ｍ形保持器に比べて、通油性が悪くなることが懸念される。 Unlike the M-type cage shown in FIG. 11, in the case of a cage having a structure in which a roller retaining claw is formed in the collar as a means for preventing the roller from coming to the inner diameter side, the roller is arranged on the pitch circle diameter PCD of the roller arrangement. Since there is no guide portion, the cage is likely to run sideways due to roller skew or the like. Further, since the number of rollers increases, there is a concern that the oil permeability is deteriorated as compared with the M-type cage.

この発明の目的は、ころのスキューを防ぎ、かつ通油性に優れた高負荷容量型の保持器付きころを提供することである。 An object of the present invention is to provide a roller with a high load capacity type that retains roller skew and is excellent in oil permeability.

この発明に従った保持器付きころは、複数のころと、保持器とからなる。保持器は、ころ配列のピッチ円直径よりも大径の環状部と、この環状部の軸方向両端から内径側に突出する鍔部と、環状部に円周方向に並んで形成されて互いの間で柱部を形成し内部にころがそれぞれ入る複数のポケットと、ころの保持器内径側への抜け止めを行なう抜け止め手段とを有する。抜け止め手段は、鍔部の内径縁から軸方向内側に折り曲げられて突出して延び、隣接するころの間に位置するころ保持爪を備える。ポケットは、周方向幅が相対的に大きい広幅部と、周方向幅が相対的に小さい狭幅部とからなる。広幅部の軸方向長さをＬＷとし、狭幅部の軸方向長さをＬＮとしたとき、０．７≦ＬＮ／ＬＷ≦１．３の寸法関係が成立する。 The roller with a cage according to the present invention includes a plurality of rollers and a cage. The cage is formed by arranging an annular portion having a diameter larger than the pitch circle diameter of the roller arrangement, a flange portion protruding from the both axial ends of the annular portion toward the inner diameter side, and the annular portion side by side in the circumferential direction. There are a plurality of pockets in which the rollers are formed and the rollers are respectively inserted therein, and retaining means for retaining the rollers toward the inner diameter side of the cage. The retaining means includes a roller holding claw that is bent and protrudes inward in the axial direction from the inner diameter edge of the flange, and is positioned between adjacent rollers. The pocket includes a wide portion having a relatively large circumferential width and a narrow portion having a relatively small circumferential width. When the axial length of the wide portion is LW and the axial length of the narrow portion is LN, a dimensional relationship of 0.7 ≦ LN / LW ≦ 1.3 is established.

上記の構成によれば、保持器の柱部ところ保持爪とで、ころの外径側への抜け止めと内径側への抜け止めとを役割分担させているので、柱部を簡素な形状とすることができ、柱部の位置を従来よりも外径側に配置することが可能となり、ころ間の隙間も小さくできる。こうして、一定のスペース内でころ本数を多くすることができるので、大きな負荷容量を得ることができる。 According to the above configuration, the retainer column portion and the retaining claws share the roles of retaining the roller to the outer diameter side and retaining the inner diameter side, so the column portion has a simple shape. It is possible to position the column portion on the outer diameter side as compared with the prior art, and the gap between the rollers can be reduced. Thus, since the number of rollers can be increased within a certain space, a large load capacity can be obtained.

ころの内径側への抜け止めは、保持器の鍔部に設けたころ保持爪で行なうため、保持器が１部品で構成でき、部品点数を削減して低コストにできる。また、ころ保持爪が保持器の鍔部に設けられたものであるため、柱部と異なり、軸方向の一部に局所的に設けたもので済む。したがって、軸受内の空間容積の減少に影響が少なく、内径側に柱部を設ける場合に比べて通油性が向上する。 Since the rollers are prevented from coming off to the inner diameter side by the roller holding claws provided on the flange portion of the cage, the cage can be constituted by one part, and the number of parts can be reduced and the cost can be reduced. Further, since the roller holding claw is provided on the collar portion of the cage, unlike the column portion, it may be provided locally on a part of the axial direction. Therefore, there is little influence on the reduction of the space volume in the bearing, and the oil permeability is improved as compared with the case where the column portion is provided on the inner diameter side.

さらに、ポケットの狭幅部において、ころの外径面は両側の柱部に接するか近接するので、ころのスキューが効果的に抑制される。ポケットの広幅部においては、ころの外径面と両側の柱部との間に比較的大きな隙間が形成されるので、保持器環状部における通油を促進できる。 Further, in the narrow width portion of the pocket, the outer diameter surface of the roller is in contact with or close to the pillars on both sides, so that the roller skew is effectively suppressed. In the wide portion of the pocket, since a relatively large gap is formed between the outer diameter surface of the roller and the pillars on both sides, oil passage in the annular portion of the cage can be promoted.

良好なころのスキュー抑制効果と良好な通油性とを兼ね備えるようにするために、狭幅部の軸方向長さと広幅部の軸方向長さとの比（ＬＮ／ＬＷ）を０．７〜１．３にすることが望ましい。 In order to have both a good roller skew suppression effect and good oil permeability, the ratio of the axial length of the narrow portion to the axial length of the wide portion (LN / LW) is 0.7-1. 3 is desirable.

好ましくは、狭幅部は、広幅部を挟むように複数箇所に設けられる。狭幅部を離れた箇所に複数設けることにより、ころのスキュー抑制効果を一層高められる。一つの実施形態では、広幅部がポケットの軸方向中央部に位置し、狭幅部がポケットの軸方向両端部に位置する。 Preferably, the narrow portion is provided at a plurality of locations so as to sandwich the wide portion. By providing a plurality of narrow width portions at a distance, the roller skew suppression effect can be further enhanced. In one embodiment, the wide portion is located at the axial center of the pocket and the narrow portion is located at both axial ends of the pocket.

好ましくは、ころ保持爪の鍔部に対する折り曲げ角度を３０〜９０度の範囲内となるようにする。折り曲げ角度がこの範囲内であれば、ころ落ちの発生するおそれがないようにころを保持でき、かつころ保持爪の破損の問題も生じさせない。 Preferably, the bending angle of the roller holding claws with respect to the collar portion is set within a range of 30 to 90 degrees. If the bending angle is within this range, the rollers can be held so that there is no risk of roller dropping, and the problem of breakage of the roller holding claws will not occur.

ころ保持爪の長さを、ころの面取り部に掛かる程度としてもよい。言い換えれば、ころ保持爪が面取り部に確実に掛かるが、面取り部から大きく突出しない程度の長さとしてもよい。このように面取り部に掛かる程度の長さとすることで、ころの内径側への脱落を確実に防止しながら、ころの収容スペースをできるだけ広くすることができる。 The length of the roller holding claw may be set to a degree that hangs on the chamfered portion of the roller. In other words, the roller holding claw is surely hooked on the chamfered portion, but the length may be such that it does not protrude greatly from the chamfered portion. By setting the length so as to be applied to the chamfered portion in this way, it is possible to make the accommodation space of the roller as wide as possible while reliably preventing the roller from dropping out toward the inner diameter side.

以上のように、この発明によれば、ころのスキューを防ぎ、かつ通油性に優れた高負荷容量型の保持器付きころを得ることができる。 As described above, according to the present invention, it is possible to obtain a roller with a high load capacity type cage that prevents roller skew and is excellent in oil permeability.

この発明の一実施形態に係る保持器付きころを、図１〜図７を参照して説明する。 A roller with cage according to an embodiment of the present invention will be described with reference to FIGS.

保持器付きころは、複数のころ２と、保持器１とからなり、ころ２が軸の外径面およびハウジングの内径面（いずれも図示せず）に直接に転接するように用いられる。保持器１は、ころ配列のピッチ円直径ＰＣＤよりも大径の環状部と、この環状部の軸方向両端から内径側に突出する一対の鍔部３、４とを有する。保持器１の環状部は、円周方向に交互に形成された柱部５とポケット６とを含む。円周方向に並んだ各柱部５は、ころ２の軸方向に長い形状をしており、隣接する柱部５間のポケット６内に各ころ２を収容する。柱部５によって、隣接するころ２の間隔が保持される。 The roller with cage is composed of a plurality of rollers 2 and a cage 1, and the roller 2 is used so as to directly contact the outer diameter surface of the shaft and the inner diameter surface of the housing (both not shown). The cage 1 has an annular portion having a diameter larger than the pitch circle diameter PCD of the roller arrangement, and a pair of flange portions 3 and 4 protruding from the both axial ends of the annular portion toward the inner diameter side. The annular portion of the cage 1 includes column portions 5 and pockets 6 that are alternately formed in the circumferential direction. Each column part 5 arranged in the circumferential direction has a long shape in the axial direction of the roller 2, and each roller 2 is accommodated in a pocket 6 between the adjacent column parts 5. The interval between the adjacent rollers 2 is maintained by the column portion 5.

保持器１は、ころ２の保持器内径側への抜け止めを行なう抜け止め手段を有する。具体的には、抜け止め手段は、各鍔部３，４の内径縁から軸方向内側に折り曲げられて突出して延び、隣接するころ２の間に位置する曲げ片状のころ保持爪７である。ころ２は、軸受鋼等からなり、例えば針状ころまたは棒状ころである。 The cage 1 has retaining means for preventing the rollers 2 from coming off to the inner diameter side of the cage. Specifically, the retaining means is a bent piece-like roller holding claw 7 which is bent and protrudes inward in the axial direction from the inner diameter edge of each flange portion 3, 4 and is positioned between adjacent rollers 2. . The roller 2 is made of bearing steel or the like, and is, for example, a needle roller or a rod roller.

保持器１における両側の鍔部３，４は、保持器中心軸Ｏに対してほぼ垂直な平板状に形成されている。各柱部５間のポケット６の最大周方向幅ｍは、ころ２の外径よりも僅かに小さく、ころ２が外径側に抜けることを柱部５で防止している。保持器１の柱部５は、ころ２の配列のピッチ円直径ＰＣＤよりも外径側に位置し、ころ保持爪７はピッチ円直径ＰＣＤよりも内径側に位置している。 The flanges 3 and 4 on both sides of the cage 1 are formed in a flat plate shape that is substantially perpendicular to the cage center axis O. The maximum circumferential width m of the pocket 6 between the pillars 5 is slightly smaller than the outer diameter of the rollers 2, and the pillars 5 prevent the rollers 2 from coming out to the outer diameter side. The column portion 5 of the cage 1 is positioned on the outer diameter side of the pitch circle diameter PCD of the arrangement of the rollers 2, and the roller holding claws 7 are positioned on the inner diameter side of the pitch circle diameter PCD.

保持器１の全体形状は、鋼管を削り出し加工、または１枚の鋼板をプレス加工して作られる。ころ保持爪７は、一対の鍔部３，４の内径側に放射状に突出するように設けられる。ころ保持爪７の形成方法として、プレス加工、ワイヤカット、放電加工等を採用できる。ころ２を組込む前の段階では、ころ保持爪７は、軸方向内側に折り曲げられておらず、鍔部７と同平面に位置する。 The overall shape of the cage 1 is made by machining a steel pipe or pressing a single steel plate. The roller holding claws 7 are provided so as to protrude radially on the inner diameter side of the pair of flange portions 3 and 4. As a method for forming the roller holding claws 7, press working, wire cutting, electric discharge machining, or the like can be employed. Before the roller 2 is assembled, the roller holding claw 7 is not bent inward in the axial direction, and is positioned in the same plane as the flange portion 7.

保持器１の強度を高めるために、保持器１に対して熱処理を行なう。熱処理法としては、高周波焼入れ、光輝焼入れ、浸炭焼入れ等を採用できる。保持器１は、焼入れ性およびプレス加工性を考慮して、好ましくは０．１５〜１．１０質量％の炭素を含有する。 In order to increase the strength of the cage 1, heat treatment is performed on the cage 1. As the heat treatment method, induction quenching, bright quenching, carburizing quenching or the like can be adopted. The cage 1 preferably contains 0.15 to 1.10% by mass of carbon in consideration of hardenability and press workability.

熱処理法として高周波焼入れを採用する場合、好ましくは、ころ保持爪７を除く残りの部分に対して高周波焼入れおよび高周波焼戻しを施し、所望の硬度となるように硬化処理をする。一方、ころ保持爪７については、高周波焼入れを施さず、相対的に低い硬度のままとする。このようにすれば、ころ保持爪７の折り曲げ加工が容易となる。例えば、ころ保持爪７の硬度は、ＨＶ４００以下である。 When induction hardening is adopted as the heat treatment method, it is preferable that induction hardening and induction tempering be performed on the remaining portion excluding the roller holding claws 7 to perform a hardening process so as to obtain a desired hardness. On the other hand, the roller holding claws 7 are not subjected to induction hardening and remain relatively low in hardness. If it does in this way, the bending process of the roller holding claw 7 will become easy. For example, the hardness of the roller holding claw 7 is HV400 or less.

熱処理法として光輝焼入れや浸炭焼入れ等を採用する場合、保持器１の全体に対して焼入れ処理を施した後に、ころ保持爪７に対して焼鈍を行なってころ保持爪７の硬度を低下させるようにしてもよい。 When bright quenching, carburizing quenching, or the like is adopted as the heat treatment method, the roller holding claws 7 are annealed after the entire cage 1 is quenched to reduce the hardness of the roller holding claws 7. It may be.

熱処理を施した保持器１にころ２を組込んだ後に、ころ保持爪７を鍔部３，４の内径縁から軸方向内側に折り曲げ加工する。折り曲げ加工としては、プレス加工や、へら絞り加工等を採用できる。 After the roller 2 is assembled into the heat-treated cage 1, the roller holding claw 7 is bent from the inner edge of the flange portions 3 and 4 inward in the axial direction. As the bending process, a press process or a spatula drawing process can be employed.

図４に曲げ込んだころ保持爪７の形状を示す。ころ保持爪７の鍔部３，４に対する折り曲げ角度θは、３０〜９０度とする。ころ保持爪７の折り曲げ角度が３０度未満であると、ころ２がころ保持爪７を潜り抜け、ころ落ちが発生するおそれがある。一方、９０度を超える角度まで曲げると、ころ保持爪７が破損するおそれがある。３０〜９０度の折り曲げ角度の範囲であれば、ころ落ちの発生を生じさせること無くころ２の保持を行なうことができ、かつころ保持爪７の破損の問題も生じさせない。 FIG. 4 shows the shape of the roller holding claw 7 bent. The bending angle θ of the roller holding claws 7 with respect to the flange portions 3 and 4 is 30 to 90 degrees. If the bending angle of the roller holding claws 7 is less than 30 degrees, the rollers 2 may pass through the roller holding claws 7 and roller dropping may occur. On the other hand, if it is bent to an angle exceeding 90 degrees, the roller holding claws 7 may be damaged. If the bending angle is in the range of 30 to 90 degrees, the roller 2 can be held without causing the occurrence of roller dropping, and the problem of breakage of the roller holding claws 7 does not occur.

ころ保持爪７の長さは、ころ保持爪７がころ２の面取り部にかかる程度が好ましい。このように、ころ保持爪７の曲げ角度θおよび長さを適正に設定することにより、ころ２の収容スペースを狭くすることなく、ころ２の内径側への脱落も確実に防止できる。 The length of the roller holding claw 7 is preferably such that the roller holding claw 7 is applied to the chamfered portion of the roller 2. As described above, by appropriately setting the bending angle θ and the length of the roller holding claws 7, the roller 2 can be reliably prevented from dropping out toward the inner diameter side without narrowing the accommodation space of the roller 2.

図５は、保持器１のポケット６を拡大して示している。図６は図５の線Ａ−Ａに沿って見た断面図、図７は図５の線Ｂ−Ｂに沿って見た断面図である。これらの図を参照して、本発明の実施形態におけるポケット６の特徴的な形状を説明する。 FIG. 5 shows the pocket 6 of the cage 1 in an enlarged manner. 6 is a cross-sectional view taken along line AA in FIG. 5, and FIG. 7 is a cross-sectional view taken along line BB in FIG. With reference to these drawings, the characteristic shape of the pocket 6 in the embodiment of the present invention will be described.

ころ２の軸方向に長いポケット６は、周方向の幅が相対的に大きい広幅部６ａと、周方向の幅が相対的に小さい狭幅部６ｂ、６ｃとから成る。好ましくは、狭幅部６ｂ、６ｃは、広幅部６ａを挟むように複数箇所に設けられている。図示した実施形態では、広幅部６ａはポケット６の軸方向中央部に位置し、狭幅部６ｂ、６ｃはポケット６の軸方向両端部に位置している。 The axially long pocket 6 of the roller 2 includes a wide portion 6a having a relatively large width in the circumferential direction and narrow portions 6b and 6c having a relatively small width in the circumferential direction. Preferably, the narrow portions 6b and 6c are provided at a plurality of locations so as to sandwich the wide portion 6a. In the illustrated embodiment, the wide width portion 6 a is located at the axial center portion of the pocket 6, and the narrow width portions 6 b and 6 c are located at both axial end portions of the pocket 6.

図６に示すようにポケット６の狭幅部６ｂにおいては、ころ２の外径面は両側の柱部５に接するか近接するので、ころ２のスキューを効果的に抑制する。図示した実施形態のように、狭幅部２をポケット６の軸方向両端部に設けるようにすれば、ころ２のスキュー抑制効果を一層高めることができる。 As shown in FIG. 6, in the narrow width portion 6 b of the pocket 6, the outer diameter surface of the roller 2 is in contact with or close to the column portions 5 on both sides, so that the skew of the roller 2 is effectively suppressed. If the narrow portions 2 are provided at both axial ends of the pocket 6 as in the illustrated embodiment, the skew suppression effect of the rollers 2 can be further enhanced.

図７に示すようにポケット６の広幅部６ａにおいては、ころ２の外径面と両側の柱部５との間に比較的大きな隙間が形成されるので、保持器環状部における通油を促進できる。なお、ころ２の保持器外径側への抜けを防止するために、広幅部６ａの周方向幅は、ころ２の直径よりも僅かに小さくしておくのが望ましい。 As shown in FIG. 7, in the wide width portion 6a of the pocket 6, a relatively large gap is formed between the outer diameter surface of the roller 2 and the pillar portions 5 on both sides, so that oil passing through the cage annular portion is promoted. it can. In order to prevent the roller 2 from coming out to the outer diameter side of the cage, it is desirable that the circumferential width of the wide width portion 6 a be slightly smaller than the diameter of the roller 2.

良好なころ２のスキュー抑制効果と良好な通油性とを兼ね備えるようにするために、狭幅部６ｂ、６ｃの合計軸方向長さＬＮと、広幅部６ａの軸方向長さＬＷとの比ＬＮ／ＬＷを、０．７〜１．３の範囲内にすることが望ましい。 In order to combine the skew suppression effect of the good roller 2 and good oil permeability, the ratio LN between the total axial length LN of the narrow portions 6b and 6c and the axial length LW of the wide portion 6a / LW is preferably in the range of 0.7 to 1.3.

なお、図示した実施形態では、広幅部６ａが１箇所に形成され、狭幅部６ｂ、６ｃが２箇所に形成されていたが、他の実施形態として、交互に配置する広幅部と狭幅部とをそれぞれ複数設けるようにしてもよい。さらに他の実施形態として、広幅部および狭幅部をそれぞれ１箇所だけに設けるようにしてもよい。 In the illustrated embodiment, the wide portion 6a is formed at one place and the narrow portions 6b and 6c are formed at two places. However, as another embodiment, the wide portion and the narrow portion arranged alternately. And a plurality of each may be provided. As yet another embodiment, the wide part and the narrow part may be provided in only one place.

図４に示した実施形態では、ころ保持爪７が鍔部３，４から軸方向内側に向かって折り曲げられて直線状に延びているが、他の実施形態として、図８に示すように、ころ保持爪７の内側が凹となる円弧状の曲線形状としてもよい。また、図９に示すように、ころ保持爪７の形状を、先端に向けて厚みが漸減する先細り形状としてもよい。 In the embodiment shown in FIG. 4, the roller holding claws 7 are bent inward in the axial direction from the flange portions 3 and 4 and extend linearly, but as another embodiment, as shown in FIG. An arcuate curved shape in which the inner side of the roller holding claw 7 is concave may be used. Moreover, as shown in FIG. 9, it is good also considering the shape of the roller holding nail | claw 7 as the taper shape which thickness decreases gradually toward a front-end | tip.

本発明の実施形態に係る保持器付きころによると、保持器１の柱部５ところ保持爪７とで、ころ２の外径側への抜け止めと、内径側への抜け止めとを役割分担させているので、柱部５を簡素な形状にすることができ、柱部５の位置をより外側に配置することができる。その結果、ころ間の隙間を小さくして、一定のスペース内でころ本数を多くすることができるので、大きな負荷容量を得ることができる。 According to the roller with cage according to the embodiment of the present invention, the pillar portion 5 of the cage 1 and the retaining claw 7 share the roles of preventing the roller 2 from slipping out to the outer diameter side and retaining from the inner diameter side. Therefore, the pillar part 5 can be made into a simple shape, and the position of the pillar part 5 can be arranged on the outer side. As a result, the gap between the rollers can be reduced and the number of rollers can be increased within a certain space, so that a large load capacity can be obtained.

ころ２の内径側への抜け止めは、保持器１の鍔部３，４の内径縁から軸方向内側に折り曲げられて突出して延びるころ保持爪７によって行なうため、保持器１を一部品で構成でき、部品点数を削減できて低コストとなる。また、ころ保持爪７の占める領域は小さいので、軸受内の空間容積の減少に影響が少なく、内径側に柱部を設ける場合に比べて通油性が向上する。 The roller 2 is prevented from slipping out to the inner diameter side by the roller holding claw 7 which is bent and protrudes inward in the axial direction from the inner diameter edge of the flange portions 3 and 4 of the cage 1. The number of parts can be reduced and the cost is reduced. Further, since the area occupied by the roller holding claws 7 is small, there is little influence on the reduction of the space volume in the bearing, and the oil permeability is improved as compared with the case where the column part is provided on the inner diameter side.

図１０は、この発明のさらに他の実施形態を示す。この実施形態では、ころ保持爪７を一方の鍔部４のみに設けたものである。このようにころ保持爪７を一方の鍔部のみに設けた場合、ころ２はその一端がころ保持爪７によって支持されるが、他端が内径側に傾くおそれがある。この場合、両側の鍔部３，４間の間隔ところ２の長さとの関係を適宜設定しておけば、ころ２の他端は鍔部３の内面に当接して内径側に抜け出ることは阻止される。ころ保持爪７は、保持器付きころを単独で取り扱うときに、ころ２の抜け止めを行なうためのものである。言い換えれば、ころ保持爪７は、機器へ組込まれた状態では必要なものではないので、上記のようにころ２が傾き状態で抜け止めされても、使用上の性能への影響はない。このようにころ保持爪７を片側の鍔部４のみに設けるようにすれば、製造が簡単で低コスト化が図れる。 FIG. 10 shows still another embodiment of the present invention. In this embodiment, the roller holding claws 7 are provided only on one flange 4. Thus, when the roller holding claw 7 is provided only on one of the collars, one end of the roller 2 is supported by the roller holding claw 7, but the other end may be inclined toward the inner diameter side. In this case, if the relationship between the distance between the flange portions 3 and 4 on both sides and the length of 2 is appropriately set, the other end of the roller 2 is prevented from coming into contact with the inner surface of the flange portion 3 and coming out to the inner diameter side. Is done. The roller holding claw 7 is for preventing the roller 2 from coming off when handling the roller with a cage alone. In other words, since the roller holding claw 7 is not necessary in a state where it is incorporated in a device, even if the roller 2 is prevented from coming off in an inclined state as described above, it does not affect the performance in use. If the roller holding claws 7 are provided only on the collar 4 on one side in this way, the manufacture is simple and the cost can be reduced.

以上、図面を参照してこの発明の実施形態を説明したが、この発明は、図示した実施形態のものに限定されない。図示した実施形態に対して、この発明と同一の範囲内において、あるいは均等の範囲内において、種々の修正や変更を加えることが可能である。 As mentioned above, although embodiment of this invention was described with reference to drawings, this invention is not limited to the thing of embodiment shown in figure. Various modifications and changes can be made to the illustrated embodiment within the same range as the present invention or within an equivalent range.

この発明は、一般産業機械に用いられる高負荷容量型の保持器付きころに有利に利用され得る。 The present invention can be advantageously used for a roller with a high load capacity type cage used in general industrial machines.

この発明の一実施形態に係る保持器付きころの横断面図である。It is a cross-sectional view of the roller with cage according to one embodiment of the present invention. 図１の線ＩＩ−ＩＩに沿って見た断面図である。It is sectional drawing seen along line II-II of FIG. 上記の保持器付きころの正面図である。It is a front view of said roller with a retainer. 図２の部分拡大図である。FIG. 3 is a partially enlarged view of FIG. 2. 保持器のポケットを拡大して示す図である。It is a figure which expands and shows the pocket of a holder | retainer. 図５の線Ａ−Ａに沿って見た断面図である。FIG. 6 is a cross-sectional view taken along line AA in FIG. 5. 図５の線Ｂ−Ｂに沿って見た断面図である。It is sectional drawing seen along line BB of FIG. 保持器付きころのころ保持爪の変形例を示す断面図である。It is sectional drawing which shows the modification of the roller holding nail | claw of a roller with a holder | retainer. 保持器付きころのころ保持爪の他の変形例を示す断面図である。It is sectional drawing which shows the other modification of the roller holding nail | claw of a roller with a holder | retainer. 保持器付きころの保持器の変形例を示す断面図である。It is sectional drawing which shows the modification of the holder | retainer of the roller with a holder | retainer. 従来の保持器付きころの保持器を示す図であり、（Ａ）は部分斜視図、（Ｂ）は部分断面図である。It is a figure which shows the retainer of the conventional roller with a retainer, (A) is a fragmentary perspective view, (B) is a fragmentary sectional view. 従来の保持器付きころの他の例を示す横断面図である。It is a cross-sectional view which shows the other example of the conventional roller with a holder | retainer. 図１２の線ＸＩＩ−ＸＩＩに沿って見た断面図である。It is sectional drawing seen along line XII-XII of FIG. 図１２に示した保持器付きころの正面図である。It is a front view of the roller with a retainer shown in FIG. 従来の保持器付きころのさらに他の例を示す横断面図である。It is a cross-sectional view showing still another example of a conventional roller with cage. 図１５の線ＸＶ−ＸＶに沿って見た断面図である。It is sectional drawing seen along line XV-XV of FIG. 図１６の抜け止め手段を示す図であり、（Ａ）は図１６のＡ部の拡大図、（Ｂ）は抜け止め手段の斜視図である。It is a figure which shows the retaining means of FIG. 16, (A) is an enlarged view of the A section of FIG. 16, (B) is a perspective view of a retaining means.

符号の説明Explanation of symbols

１保持器、２ころ、３，４鍔部、５柱部、６ポケット、６ａ広幅部、６ｂ、６ｃ狭幅部、７ころ保持爪。 DESCRIPTION OF SYMBOLS 1 Cage, 2 rollers, 3, 4 collar part, 5 pillar part, 6 pocket, 6a Wide part, 6b, 6c Narrow part, 7 Rolling nail | claw.

Claims

複数のころと、保持器とからなり、前記保持器が、ころ配列のピッチ円直径よりも大径の環状部と、この環状部の軸方向両端から内径側に突出する鍔部と、前記環状部に円周方向に並んで形成されて互いの間で柱部を形成し内部に前記ころがそれぞれ入る複数のポケットと、前記ころの保持器内径側への抜け止めを行なう抜け止め手段とを有する保持器付きころにおいて、
前記抜け止め手段は、前記鍔部の内径縁から軸方向内側に折り曲げられて突出して延び、隣接するころの間に位置するころ保持爪を備え、
前記ポケットは、周方向幅が相対的に大きい広幅部と、周方向幅が相対的に小さい狭幅部とからなることを特徴とする、保持器付きころ。 A plurality of rollers and a cage, wherein the cage is an annular portion having a diameter larger than the pitch circle diameter of the roller arrangement, a flange portion protruding from the both axial ends of the annular portion toward the inner diameter side, and the annular portion A plurality of pockets that are formed side by side in the circumferential direction to form pillar portions between the rollers and into which the rollers enter, and retaining means for retaining the rollers to the inner diameter side of the cage. In the roller with cage,
The retaining means includes a roller holding claw that is bent and protrudes inward in the axial direction from the inner diameter edge of the flange, and is positioned between adjacent rollers,
The roller with a cage, wherein the pocket includes a wide portion having a relatively large circumferential width and a narrow portion having a relatively small circumferential width.

前記広幅部の軸方向長さをＬＷとし、前記狭幅部の軸方向長さをＬＮとしたとき、
０．７≦ＬＮ／ＬＷ≦１．３
の寸法関係が成立する、請求項１または２に記載の保持器付きころ。 When the axial length of the wide portion is LW and the axial length of the narrow portion is LN,
0.7 ≦ LN / LW ≦ 1.3
The roller with a retainer according to claim 1 or 2, wherein the following dimensional relationship is established.

前記狭幅部は、前記広幅部を挟むように複数箇所に設けられている、請求項１または２に記載の保持器付きころ。 The roller with a retainer according to claim 1 or 2, wherein the narrow portion is provided at a plurality of locations so as to sandwich the wide portion.

前記広幅部が前記ポケットの軸方向中央部に位置し、前記狭幅部が前記ポケットの軸方向両端部に位置している、請求項１〜３のいずれかに記載の保持器付きころ。 The roller with a retainer according to any one of claims 1 to 3, wherein the wide portion is located in a central portion in the axial direction of the pocket, and the narrow portion is located in both axial end portions of the pocket.

前記ころ保持爪の前記鍔部に対する折り曲げ角度が、３０〜９０度である、請求項１〜４のいずれかに記載の保持器付きころ。 The roller with a retainer in any one of Claims 1-4 whose bending angle with respect to the said collar part of the said roller holding nail is 30-90 degree | times.

前記ころ保持爪の長さを、前記ころの面取り部に掛かる程度とした、請求項１〜５のいずれかに記載の保持器付きころ。
The roller with a cage according to any one of claims 1 to 5, wherein a length of the roller holding claw is set to be about a length of a chamfered portion of the roller.