JP2008240950A - Retainer for rolling bearing - Google Patents

Retainer for rolling bearing Download PDF

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Publication number
JP2008240950A
JP2008240950A JP2007084379A JP2007084379A JP2008240950A JP 2008240950 A JP2008240950 A JP 2008240950A JP 2007084379 A JP2007084379 A JP 2007084379A JP 2007084379 A JP2007084379 A JP 2007084379A JP 2008240950 A JP2008240950 A JP 2008240950A
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Prior art keywords
pocket
rolling bearing
cage
lubricant
annular body
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JP2007084379A
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JP4930142B2 (en
JP2008240950A5 (en
Inventor
Hironori Hiraoka
寛規 平岡
Mikio Kuromatsu
幹雄 黒松
Yasuhiro Sakamoto
康裕 阪本
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JTEKT Corp
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JTEKT Corp
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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
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
    • F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
    • F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

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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 retainer for a rolling bearing for considerably improving lubricating performance while focusing on deformation of the retainer, especially, displacement of a pocket opening part and considering a lubricant flow. <P>SOLUTION: An outside surface 11a of an annular body 11 is formed in a tapered shape of which diameter becomes smaller toward an opening of a pocket 12. A rib 15 is formed at a back face side end part of the annular body outside surface 11a. A lubricant reservoir 16 having an opening to a radially inner direction is provided at a back face of a pillar part 13 formed between adjacent pockets 12. A notch part 17 extending from the opening of the pocket 12 into the lubricant reservoir 16 is provided at an inner surface of the annular body 11. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、冠型の転がり軸受用保持器に関する。   The present invention relates to a crown type rolling bearing cage.

転がり軸受用保持器として、特許文献１には、転動体を収容するポケットが環状体の一側面に所定間隔で複数設けられている冠型の転がり軸受用保持器において、周方向に隣り合うポケットの間にある柱部に、ポケットの開口と反対の背面側に開口する背抜きが設けられるとともに、背抜きとポケットとを連通する潤滑剤の通孔が設けられているものが開示されている。
特開平７−２１７６５９号公報 As a rolling bearing cage, Patent Document 1 discloses a pocket-shaped rolling bearing cage in which a plurality of pockets for accommodating rolling elements are provided at predetermined intervals on one side of an annular body, and pockets adjacent in the circumferential direction. A column having a back opening that opens on the back side opposite to the opening of the pocket and a through hole for a lubricant that communicates the back opening and the pocket are provided in the column portion between them.
JP-A-7-217659

上記特許文献１の転がり軸受用保持器によると、背抜きとポケットとを連通する潤滑剤の通孔を設けることによって、潤滑性能を向上させることができるが、この種の保持器において、潤滑性能の向上は、依然として重要な課題となっている。潤滑性能が欠乏すると、保持器音が発生し、軸受振動が増大するという問題もある。   According to the rolling bearing cage of Patent Document 1 described above, the lubrication performance can be improved by providing a through hole for the lubricant that communicates the back strip and the pocket. In this type of cage, Improvement remains an important issue. If the lubrication performance is insufficient, cage noise is generated, and there is a problem that bearing vibration increases.

また、従来の樹脂保持器では、高速回転時に遠心力により形状が大きく変形することで、保持器ポケットのすきまが変化し、グリース確保が困難になるという問題もある。   Further, in the conventional resin cage, there is a problem that the clearance of the cage pocket changes due to a large deformation due to centrifugal force during high-speed rotation, making it difficult to secure grease.

この発明の目的の一つは、潤滑剤の流れを考慮することで、潤滑性能を大幅に向上させた転がり軸受用保持器を提供することにある。   One of the objects of the present invention is to provide a rolling bearing cage in which the lubrication performance is greatly improved by considering the flow of the lubricant.

また、この発明の他の目的は、従来の爪先端形状の質量に着目し、見直すことにより、遠心力による変位を低減した転がり軸受用保持器を提供することにある。   Another object of the present invention is to provide a rolling bearing retainer in which displacement due to centrifugal force is reduced by paying attention to and reviewing the mass of the conventional claw tip shape.

この発明による転がり軸受用保持器は、転動体を収容する複数のポケットが環状体の一側面に所定間隔で形成されている転がり軸受用保持器において、環状体外径が、ポケットの開口に向かって径が小さくなるテーパ状に形成されていることを特徴とするものである。   The rolling bearing retainer according to the present invention is a rolling bearing retainer in which a plurality of pockets for accommodating rolling elements are formed on a side surface of the annular body at a predetermined interval, and the outer diameter of the annular body is directed toward the opening of the pocket. It is characterized by being formed in a tapered shape with a small diameter.

従来、環状体外径は、円周面とされており、これをポケットの開口に向かって径が小さくなるテーパ状にすることで、ポケットを構成する爪部の質量が低減する。これにより、高速回転時の遠心力による爪部の変形および変位が低減する。   Conventionally, the outer diameter of the annular body is a circumferential surface, and by making it tapered toward the opening of the pocket, the mass of the claw portion constituting the pocket is reduced. Thereby, the deformation | transformation and displacement of a nail | claw part by the centrifugal force at the time of high speed rotation reduce.

保持器を構成する合成樹脂材料としては、ナイロン６６やナイロン４６などのポリアミド樹脂の他、ポリテトラフルオロエチレン（ＰＴＦＥ）、エチレンテトラフルオロエチレン（ＥＴＦＥ）などのふっ素系樹脂や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）、ポリエーテルサルフォン（ＰＥＳ）などが挙げられる。これらの樹脂にはガラス繊維などの強化繊維が添加されている。また、上記合成樹脂材料の他、ＪＩＳ規格ＳＵＳ３０４や黄銅などの金属材料などの使用も可能である。   Synthetic resin materials constituting the cage include polyamide resins such as nylon 66 and nylon 46, fluorine resins such as polytetrafluoroethylene (PTFE) and ethylene tetrafluoroethylene (ETFE), and polyether ether ketone (PEEK). ), Polyphenylene sulfide (PPS), polyethersulfone (PES), and the like. Reinforcing fibers such as glass fibers are added to these resins. In addition to the synthetic resin material, it is possible to use a metal material such as JIS standard SUS304 or brass.

内・外輪および転動体は、ＪＩＳ規格ＳＵＪ−２やＳＵＳ４４０Ｃ、ＳＵＳ６３０あるいはＳＡＥ規格５１２０材などで適宜作成される。   The inner / outer rings and rolling elements are appropriately made of JIS standard SUJ-2, SUS440C, SUS630, SAE standard 5120, or the like.

この発明による転がり軸受用保持器において、環状体外径の背面（ポケットの開口面と反対側の面）側端部にリブが形成されていることが好ましい。遠心力を受けた潤滑剤は、環状体外径に案内される形で、保持器の背面側（径方向外方）へと移動するが、ここにリブが形成されていることで、それ以上の移動が防止される。   In the rolling bearing retainer according to the present invention, it is preferable that a rib is formed at the rear end (surface opposite to the opening surface of the pocket) of the annular body outer diameter. The lubricant subjected to the centrifugal force moves to the rear side (radially outward) of the cage while being guided by the outer diameter of the annular body. Movement is prevented.

また、隣り合うポケット間に形成された柱部の背面に、径方向内方に開口した潤滑剤溜まりが設けられていることが好ましい。この場合に、環状体内径に、ポケットの開口から潤滑剤溜まり内にのびる切欠き部が設けられていることがより好ましい。   Moreover, it is preferable that a lubricant reservoir opened radially inward is provided on the back surface of the column portion formed between adjacent pockets. In this case, it is more preferable that a notch extending from the opening of the pocket into the lubricant reservoir is provided on the inner diameter of the annular body.

潤滑剤（例えばグリース）は、初期状態で、この潤滑剤溜まりに封入される。潤滑剤溜まりにある潤滑剤は、径方向外方への移動が柱部の外径側の面によって防止され、また、環状体内径に潤滑剤溜まり内に入り込む切欠き部が設けられているので、ポケット内に径方向内方から移動しやすくなっており、径方向内方から潤滑油が転走部に供給される。潤滑剤は、潤滑剤溜まりに封入されるのに加えて、従来と同じ場所例えば隣り合うポケットの各爪部間に封入されてもよく、この部分には封入されなくてもよい。従来と同じ場所にも潤滑剤を封入することで、保持器の背面側および正面側（ポケットが開口している側）からの両側封入となり、潤滑性能がより高められる。   A lubricant (for example, grease) is sealed in the lubricant reservoir in an initial state. The lubricant in the lubricant reservoir is prevented from moving radially outward by the surface on the outer diameter side of the column portion, and a notch portion is provided on the inner diameter of the annular body so as to enter the lubricant reservoir. It is easy to move into the pocket from the inside in the radial direction, and the lubricating oil is supplied to the rolling section from the inside in the radial direction. In addition to being encapsulated in the lubricant reservoir, the lubricant may be encapsulated in the same place as in the past, for example, between the claw portions of adjacent pockets, or may not be encapsulated in this portion. By encapsulating the lubricant in the same place as before, both sides are encapsulated from the back side and the front side (side where the pockets are open) of the cage, and the lubrication performance is further improved.

この発明による転がり軸受用保持器においては、さらに、ポケットの内径部に突起が形成されていることが好ましい。ポケットの内径面に突起形状を形成することで、玉と内径面との接触状態が線接触から点接触になり、玉の案内面にすきまが形成され、ポケット面への潤滑剤の流れがよくなる。   In the rolling bearing retainer according to the present invention, it is preferable that a protrusion is formed on the inner diameter portion of the pocket. By forming a protrusion shape on the inner diameter surface of the pocket, the contact state between the ball and the inner diameter surface changes from line contact to point contact, a clearance is formed on the ball guide surface, and the flow of lubricant to the pocket surface is improved. .

この発明の転がり軸受用保持器によると、環状体外径が、ポケットの開口に向かって径が小さくなるテーパ状に形成されていることにより、爪部の質量が低減する。これにより、高速回転時の遠心力による爪部の変形および変位が低減する。また、グリースを背側封入することにより、回転によるグリースの飛散が抑制され、さらに、グリースのポケット間の流れを作ることにより、保持器−玉間の潤滑状態がよくなる。   According to the rolling bearing cage of the present invention, the outer diameter of the annular body is formed in a tapered shape with the diameter decreasing toward the opening of the pocket, thereby reducing the mass of the claw portion. Thereby, the deformation | transformation and displacement of a nail | claw part by the centrifugal force at the time of high speed rotation reduce. Further, by enclosing the grease on the back side, scattering of the grease due to rotation is suppressed, and furthermore, a lubrication state between the cage and the ball is improved by creating a flow between the pockets of the grease.

この発明の実施の形態を、以下図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、この発明による転がり軸受用保持器を用いた転がり軸受を示し、図２から図５までは、この発明による転がり軸受用保持器の実施形態を示し、図６は、従来の転がり軸受用保持器を示している。以下の説明において、左右は、図１の左右をいうものとする。左がポケットの開口面側、右がその反対側（背面側と称す）となっている。   FIG. 1 shows a rolling bearing using a rolling bearing retainer according to the present invention, FIGS. 2 to 5 show an embodiment of the rolling bearing retainer according to the present invention, and FIG. 6 shows a conventional rolling bearing. A cage is shown. In the following description, the left and right refer to the left and right in FIG. The left is the opening side of the pocket, and the right is the opposite side (referred to as the back side).

転がり軸受(1)は、玉軸受で、図１に示すように、外輪(2)と、内輪(3)と、内外両輪(3)(2)間に配置された、たとえばナイロン６６などからなる冠型保持器(4)と、保持器(4)に保持されて、内外両輪(3)(2)間に配置された複数の玉（転動体）(5)と、内外両輪(3)(2)の各端部間にそれぞれ配置されたシール(6)とよりなる。   The rolling bearing (1) is a ball bearing and, as shown in FIG. 1, is made of, for example, nylon 66 disposed between the outer ring (2), the inner ring (3), and both the inner and outer rings (3) and (2). A crown type cage (4), a plurality of balls (rolling elements) (5) disposed between the inner and outer wheels (3) and (2) held by the cage (4), and both inner and outer wheels (3) ( 2) and a seal (6) disposed between the respective end portions.

保持器(4)は、環状をなす合成樹脂の射出成形品であり、環状体(11)の一側面に所定間隔で複数設けられ一方に開口して玉(5)を収容するポケット(12)と、隣り合うポケット(12)間に形成された柱部(13)と、各ポケット(12)の円周方向両縁において環状体の軸方向に突出してポケット(12)を構成している１対の爪部(14)とを備えている。   The cage (4) is an annular synthetic resin injection-molded product, and is provided with a plurality of predetermined intervals on one side of the annular body (11) and opens into one pocket (12) for accommodating balls (5). And a column part (13) formed between adjacent pockets (12), and a pocket (12) that protrudes in the axial direction of the annular body at both circumferential edges of each pocket (12) 1 A pair of claws (14).

各ポケット(12)は、玉(5)と相似形状でかつ玉(5)の曲率半径よりも若干大きな曲率半径を有する凹球面状ポケット面を有している。   Each pocket (12) has a concave spherical pocket surface that is similar in shape to the ball (5) and has a slightly larger radius of curvature than the radius of curvature of the ball (5).

環状体(11)の外径(11a)は、ポケット(12)の開口に向かって径が小さくなるテーパ状に形成されている。この外径(11a)の右端部（背面側端部）には、径方向外方に突出するリブ(15)が形成されている。   The outer diameter (11a) of the annular body (11) is formed in a tapered shape whose diameter decreases toward the opening of the pocket (12). A rib (15) protruding outward in the radial direction is formed at the right end (back end) of the outer diameter (11a).

各柱部(13)の背面には、径方向内方に開口しグリースなどの潤滑剤を封入するための潤滑剤溜まり(16)が設けられている。この潤滑剤溜まり(16)は、従来のものでは、柱部において背抜きとして使用されていた部分の内径側の壁を削除することで形成されている。外径側の壁は残されており、潤滑剤は、外径側には移動しにくいものとなっている。環状体(11)の内径の開口面側には、切欠き部(17)が設けられており、この切欠き部(17)は、潤滑剤溜まり(16)内に入り込んでいる。   On the back surface of each column portion (13), there is provided a lubricant reservoir (16) that opens radially inward and encloses a lubricant such as grease. The lubricant reservoir (16) is formed by removing a wall on the inner diameter side of a portion used as a back strip in the column portion in the conventional one. The wall on the outer diameter side remains, and the lubricant is difficult to move to the outer diameter side. A notch (17) is provided on the opening surface side of the inner diameter of the annular body (11), and the notch (17) enters the lubricant reservoir (16).

また、各ポケット(12)のポケット面における内径部（内輪(3)側の縁部の最奥部）には、ポケット(12)内方に突出した１つの突起(18)が一体に形成されている。突起(18)はポケット(12)の開口側から見て内輪(3)側を底辺とする三角形状であり、突起(18)の高さは内輪(3)側から外輪(2)側に向かって徐々に低くなっている。また、突起(18)の表面は円錐面状となっている。   In addition, a single projection (18) projecting inward from the pocket (12) is integrally formed at the inner diameter portion (the innermost portion of the inner ring (3) side edge) of the pocket surface of each pocket (12). ing. The protrusion (18) has a triangular shape with the inner ring (3) side as the bottom when viewed from the opening side of the pocket (12), and the height of the protrusion (18) is from the inner ring (3) side to the outer ring (2) side. Gradually lower. Further, the surface of the protrusion (18) is conical.

図６は、現在一般的に使用されている保持器(60)を示している。この保持器(60)は、環状をなす合成樹脂の射出成形品であり、環状体(61)の一側面に所定間隔で複数設けられ一方に開口して玉を収容するポケット(62)と、隣り合うポケット(62)間に形成された柱部(63)と、各ポケット(62)の円周方向両縁において環状体の軸方向に突出してポケット(62)を構成している１対の爪部(64)と、右方に開口するように柱部(63)に形成された背抜き(65)とを備えている。   FIG. 6 shows a cage (60) that is currently in common use. This retainer (60) is an annular synthetic resin injection-molded product, and a plurality of pockets (62) that are provided at predetermined intervals on one side of the annular body (61) and open to one side to receive balls, A pair of pillars (63) formed between adjacent pockets (62) and a pair of pockets (62) projecting in the axial direction of the annular body at both circumferential edges of each pocket (62) A claw portion (64) and a spine (65) formed in the column portion (63) so as to open to the right are provided.

この発明による保持器(4)は、形状を最適化するに際し、遠心力による変形を防止することに着目し、保持器(4)の先端形状を見直してその形状を変更することで、変位を低減するとともに、潤滑剤の保持および流れにも着目し、それに伴い潤滑剤封入位置を変更することで、潤滑性能を向上したものとなっている。この保持器(4)は、上記従来の保持器(60)に対して、次のような改良が施されている。   The cage (4) according to the present invention focuses on preventing deformation due to centrifugal force when optimizing the shape, and the displacement is reduced by reviewing the tip shape of the cage (4) and changing the shape. At the same time, focusing on the retention and flow of the lubricant, and changing the lubricant sealing position accordingly, the lubrication performance is improved. The cage (4) is improved as follows with respect to the conventional cage (60).

１．遠心力による変位低減を図るため、従来円筒面であった環状体(11)の外径(11a)をテーパ状にカットし、爪部(14)質量を小さくした。 1. In order to reduce displacement due to centrifugal force, the outer diameter (11a) of the annular body (11), which was a conventional cylindrical surface, was cut into a taper shape to reduce the mass of the claw portion (14).

２．従来、ポケット(62)の開口側からしか封入できなかった（片側封入）潤滑剤を背面側からも封入（両側封入）できるように、各柱部(13)の背面に潤滑剤溜まり(16)を設けた。 2. Lubricant reservoir (16) on the back of each column (13) so that lubricant can be sealed from the back side (enclosed on both sides) that could be sealed only from the opening side of the pocket (62). Was provided.

３．潤滑剤が遠心力によって径方向外方へ飛散しないように、従来スムーズな面であった保持器(4)の外径(11a)の一部にリブ(15)を設けた。 3. A rib (15) is provided on a part of the outer diameter (11a) of the cage (4), which has been a smooth surface in the past, so that the lubricant is not scattered radially outward by centrifugal force.

４．遠心力による変位低減を図るとともに、潤滑剤が玉(5)の表面に供給されやすくするために、従来スムーズな円筒面であった保持器(4)の内径を一部カットして切欠き部(17)を設けた。 4). In order to reduce displacement due to centrifugal force, and to make it easier for lubricant to be supplied to the surface of the ball (5), the inner diameter of the cage (4), which has been a smooth cylindrical surface in the past, is partially cut to provide a notch (17) was provided.

５．玉(5)の案内面を内径側として、ポケット(12)の外径側のすきまを抑制するために、ポケット(12)の内径部に突起(18)を設けた。 5. With the guide surface of the ball (5) as the inner diameter side, a protrusion (18) was provided on the inner diameter portion of the pocket (12) to suppress the clearance on the outer diameter side of the pocket (12).

こうして得られた保持器(4)を使用した場合の潤滑剤の流れを図４および図５に示している。   The flow of the lubricant when the cage (4) thus obtained is used is shown in FIGS.

同図において、潤滑剤としてのグリースは、背面側の潤滑剤溜まり(16)に封入されている。潤滑剤溜まり(16)に封入されたグリースは、外径側への移動が阻止されており、また、切欠き部(17)が潤滑剤溜まり(16)内まで入り込んでいるので、まず、矢印Ａで示すように、潤滑剤溜まり(16)から内径側に流出して、柱部(13)の切欠き(17)において玉(5)に供給される。次いで、矢印Ｂで示すように、ポケット(12)内に入り込むとともに、環状体(11)のテーパ状の外径(11a)に案内されて、これに沿って軸方向外方（テーパ状のため径方向外方）に移動する。外径(11a)の背面側端部には、リブ(15)が形成されているので、グリースは、矢印Ｃで示すように、このリブ15)により軸方向外方への移動が止められて、転走部の潤滑に寄与し続けることができる。   In the figure, grease as a lubricant is sealed in a lubricant reservoir (16) on the back side. The grease sealed in the lubricant reservoir (16) is prevented from moving to the outer diameter side, and the notch (17) has entered the lubricant reservoir (16). As shown by A, it flows out from the lubricant reservoir (16) to the inner diameter side and is supplied to the ball (5) at the notch (17) of the column portion (13). Next, as indicated by an arrow B, it enters the pocket (12) and is guided by the tapered outer diameter (11a) of the annular body (11), along the axially outward direction (because of the tapered shape). Move radially outward). Since the rib (15) is formed at the rear side end of the outer diameter (11a), the grease is prevented from moving outward in the axial direction by the rib 15) as shown by an arrow C. It can continue to contribute to the lubrication of the rolling part.

こうして、潤滑剤封入方法に関しては、初期封入位置が潤滑剤溜まり(16)に変更され、潤滑剤が径方向内方から供給されやすくするとともに、ポケット(12)内に保持されやすいものとされていることで、また、保持器(4)形状として、リブ(15)、切欠き(17)などによって、潤滑剤が飛散しにくくかつ玉(5)と保持器(4)との間に潤滑剤が潤滑しやすい形状となっていることから、潤滑剤の流れの適正化が図られる。なお、潤滑剤溜まり(16)に加えて、柱部(13)正面側の爪部(14)と爪部(14)との間にも潤滑剤が封入されるようにしてもよいことはもちろんである。   Thus, with regard to the method of encapsulating the lubricant, the initial encapsulating position is changed to the lubricant reservoir (16), so that the lubricant can be easily supplied from the inside in the radial direction and can be easily held in the pocket (12). In addition, the retainer (4) is shaped like a rib (15), a notch (17), etc., so that the lubricant is less likely to scatter and between the ball (5) and the retainer (4). Therefore, the flow of the lubricant can be optimized. Of course, in addition to the lubricant reservoir (16), the lubricant may also be enclosed between the claw portion (14) on the front side of the column portion (13) and the claw portion (14). It is.

ポケット(12)の内径部に設けられた突起(18)によると、この玉軸受(1)の内輪(3)が回転した場合、内輪(3)の回転方向前側の部分において、ポケット(12)の外輪(2)側の縁部が玉(5)に接触するとともに、ポケット(12)と玉(5)との間の隙間は外輪(2)側から内輪(3)側に向かって徐々に大きくなる。したがって、玉(5)に付着している潤滑剤は、隙間内に入り込んで、隙間内に保持される。こうして、ポケット(12)内径部の突起(18)によっても、潤滑剤の飛散が抑制される。   According to the protrusion (18) provided on the inner diameter part of the pocket (12), when the inner ring (3) of the ball bearing (1) rotates, the pocket (12) The outer ring (2) side edge of the ball contacts the ball (5), and the gap between the pocket (12) and the ball (5) gradually increases from the outer ring (2) side toward the inner ring (3) side. growing. Therefore, the lubricant adhering to the ball (5) enters the gap and is held in the gap. Thus, the scattering of the lubricant is also suppressed by the protrusion (18) in the inner diameter portion of the pocket (12).

この発明による保持器(4)と図６に示した保持器(60)について、ＦＥＭ解析を行ったところ、図６に示した保持器(60)では、高速回転時の遠心力により、爪部(64)が径方向外方へかつポケット(62)の開口が大きくなる方向に大きく変形し、遠心力での変位は保持器(60)の先端形状（爪部）(64)において大きく、これにより、潤滑剤飛散による潤滑性能の低下も大きいことが確認された。これに対し、この発明の保持器(4)によると、高速回転時の遠心力による変位が大幅に低減し、転がり軸受(1)内部の潤滑性能が向上することが確認された。具体的には、例えば、回転速度１５０００ｒ／ｍｉｎ、温度１５０℃での変位を比較してみると、この発明による保持器(4)は現行の保持器(60)に比べて２７％低減し、同じ条件で応力を比較してみると、この発明による保持器(4)は現行の保持器(60)に比べて３３％低減することが確認された。   When the cage (4) according to the present invention and the cage (60) shown in FIG. 6 were subjected to FEM analysis, the cage (60) shown in FIG. (64) is greatly deformed in the radially outward direction and in the direction in which the opening of the pocket (62) increases, and the displacement due to centrifugal force is large in the tip shape (claw part) (64) of the cage (60). Thus, it was confirmed that the deterioration of the lubrication performance due to the scattering of the lubricant was large. On the other hand, according to the cage (4) of the present invention, it was confirmed that the displacement due to the centrifugal force during high-speed rotation is greatly reduced, and the lubrication performance inside the rolling bearing (1) is improved. Specifically, for example, when comparing the displacement at a rotational speed of 15000 r / min and a temperature of 150 ° C., the cage (4) according to the present invention is reduced by 27% compared to the current cage (60), When the stress was compared under the same conditions, it was confirmed that the cage (4) according to the present invention was reduced by 33% compared to the current cage (60).

図１は、この発明による転がり軸受用保持器を用いた転がり軸受の部分縦断面図である。FIG. 1 is a partial longitudinal sectional view of a rolling bearing using a rolling bearing cage according to the present invention. 図２は、この発明による転がり軸受用保持器の１実施形態を示す斜視図である。FIG. 2 is a perspective view showing an embodiment of a rolling bearing cage according to the present invention. 図３は、同部分縦断面図である。FIG. 3 is a partial longitudinal sectional view of the same. 図４は、同部分横断面図である。FIG. 4 is a partial cross-sectional view of the same part. 図５は、この発明による転がり軸受用保持器における潤滑剤の流れを示す部分縦断面図である。FIG. 5 is a partial longitudinal sectional view showing the flow of the lubricant in the rolling bearing cage according to the present invention. 図６は、従来の転がり軸受用保持器を示す部分縦断面図である。FIG. 6 is a partial longitudinal sectional view showing a conventional rolling bearing cage.

符号の説明Explanation of symbols

(1) 玉軸受（転がり軸受）
(4) 保持器
(5) 玉（転動体）
(11) 環状体
(11a) テーパ状外径
(12) ポケット
(13) 柱部
(15) リブ
(16) 潤滑剤溜まり
(17) 切欠き (1) Ball bearing (rolling bearing)
(4) Cage
(5) Ball (rolling element)
(11) Toroid
(11a) Tapered outer diameter
(12) Pocket
(13) Column
(15) Rib
(16) Lubricant reservoir
(17) Notch

Claims (3)

転動体を収容するポケットが環状体の一側面に所定間隔で複数設けられている冠型の転がり軸受用保持器において、
環状体外径が、ポケットの開口に向かって径が小さくなるテーパ状に形成されていることを特徴とする転がり軸受用保持器。 In a crown-type rolling bearing retainer in which a plurality of pockets for accommodating rolling elements are provided at predetermined intervals on one side surface of an annular body,
A cage for a rolling bearing, wherein the outer diameter of the annular body is formed in a tapered shape with a diameter decreasing toward the opening of the pocket. 環状体外径の背面側端部にリブが形成されている請求項１の転がり軸受用保持器。   The rolling bearing retainer according to claim 1, wherein a rib is formed at a rear side end portion of the outer diameter of the annular body. 隣り合うポケット間に形成された柱部の背面に、径方向内方に開口した潤滑剤溜まりが設けられている請求項１または２の転がり軸受用保持器。   The rolling bearing retainer according to claim 1 or 2, wherein a lubricant reservoir opening radially inward is provided on a back surface of a column portion formed between adjacent pockets.
JP2007084379A 2007-03-28 2007-03-28 Roller bearing cage Expired - Fee Related JP4930142B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011226635A (en) * 2010-03-29 2011-11-10 Ntn Corp Rolling bearing and crown-shaped cage
CN106460929A (en) * 2014-03-28 2017-02-22 日本精工株式会社 Angular ball bearing
CN107435685A (en) * 2016-04-22 2017-12-05 株式会社捷太格特 Ball bearing
DE102019117646A1 (en) * 2019-07-01 2021-01-07 Schaeffler Technologies AG & Co. KG Snap cage for a ball bearing
DE102022102657A1 (en) 2022-02-04 2023-08-10 Schaeffler Technologies AG & Co. KG roller bearing

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JP2002333028A (en) * 2001-05-10 2002-11-22 Nsk Ltd Crowned holder
JP2002349579A (en) * 2001-05-22 2002-12-04 Nsk Ltd Ball bearing
JP2003232362A (en) * 2001-12-04 2003-08-22 Nsk Ltd Roller bearing
JP2003329045A (en) * 2002-05-13 2003-11-19 Nsk Ltd Hybrid car drive motor and roller bearing therefor
JP2005214259A (en) * 2004-01-28 2005-08-11 Nsk Ltd Ball bearing and ball bearing for alternator

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06165790A (en) * 1992-11-30 1994-06-14 Koyo Seiko Co Ltd Bearing device for dental hand piece
JP2002333028A (en) * 2001-05-10 2002-11-22 Nsk Ltd Crowned holder
JP2002349579A (en) * 2001-05-22 2002-12-04 Nsk Ltd Ball bearing
JP2003232362A (en) * 2001-12-04 2003-08-22 Nsk Ltd Roller bearing
JP2003329045A (en) * 2002-05-13 2003-11-19 Nsk Ltd Hybrid car drive motor and roller bearing therefor
JP2005214259A (en) * 2004-01-28 2005-08-11 Nsk Ltd Ball bearing and ball bearing for alternator

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011226635A (en) * 2010-03-29 2011-11-10 Ntn Corp Rolling bearing and crown-shaped cage
EP2554861A4 (en) * 2010-03-29 2016-04-20 Ntn Toyo Bearing Co Ltd Rolling bearing and crown-shaped retainer
CN106460929A (en) * 2014-03-28 2017-02-22 日本精工株式会社 Angular ball bearing
CN107435685A (en) * 2016-04-22 2017-12-05 株式会社捷太格特 Ball bearing
DE102019117646A1 (en) * 2019-07-01 2021-01-07 Schaeffler Technologies AG & Co. KG Snap cage for a ball bearing
DE102022102657A1 (en) 2022-02-04 2023-08-10 Schaeffler Technologies AG & Co. KG roller bearing
DE102022102657B4 (en) 2022-02-04 2023-12-14 Schaeffler Technologies AG & Co. KG roller bearing

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