JP2009144878A - Retainer for rolling bearing, and rolling bearing - Google Patents

Retainer for rolling bearing, and rolling bearing Download PDF

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JP2009144878A
JP2009144878A JP2007325388A JP2007325388A JP2009144878A JP 2009144878 A JP2009144878 A JP 2009144878A JP 2007325388 A JP2007325388 A JP 2007325388A JP 2007325388 A JP2007325388 A JP 2007325388A JP 2009144878 A JP2009144878 A JP 2009144878A
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cage
annular
axial direction
rolling bearing
portions
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JP5056394B2 (en
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Tomoyuki Aida
友之 合田
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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
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3862—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together
    • F16C33/3875—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages comprising two annular parts joined together made from plastic, e.g. two injection moulded parts joined by a snap fit
    • 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
    • F16C33/3806—Details of interaction of cage and race, e.g. retention, centring
    • 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
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/58—Several materials as provided for in F16C2208/30 - F16C2208/54 mentioned as option
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/20—Thermoplastic resins
    • F16C2208/60—Polyamides [PA]
    • 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
    • F16C2226/00—Joining parts; Fastening; Assembling or mounting parts
    • F16C2226/50—Positive connections
    • F16C2226/70—Positive connections with complementary interlocking parts
    • F16C2226/74—Positive connections with complementary interlocking parts with snap-fit, e.g. by clips

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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 bering and provide a rolling bearing, achieving an improved limit PV value. <P>SOLUTION: An annular portion 11b formed with a pocket surface 14 has a peripheral surface linearly formed when viewed from an axial direction, and an annular portion 11a formed with a column forming portion 15 has a peripheral surface functioning as a part of the same circumferential surface as the conventional one. Thereby, the retainer is guided to an outer ring by the annular portion 11a located on each axial side of a column portion. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、転がり軸受用保持器およびこれを備えた転がり軸受に関し、特に外輪案内で使用される樹脂製の転がり軸受用保持器およびこれを備えた転がり軸受に関する。さらに、この発明は、特に、ハイブリッド車用の高速回転玉軸受に使用されれば好適な転がり軸受用保持器および転がり軸受に関する。   The present invention relates to a rolling bearing cage and a rolling bearing including the same, and more particularly to a resin rolling bearing cage used in an outer ring guide and a rolling bearing including the same. Furthermore, the present invention relates to a rolling bearing retainer and a rolling bearing that are particularly suitable for use in a high-speed rotating ball bearing for a hybrid vehicle.

転がり軸受用保持器として、特許文献１には、軸方向で平行に対向する１対の円環部と、両円環部間に所定間隔で設けられた複数の柱部と、１対の円環部および周方向に隣り合う柱部によって形成された複数のポケットとを備えているものが開示されている。このような保持器は、通常、外周面が外輪の内周面で案内される形式（外輪案内方式）で使用される。
特開２００６−２９２０９７号公報 As a rolling bearing retainer, Patent Document 1 discloses a pair of annular portions facing in parallel in the axial direction, a plurality of column portions provided at predetermined intervals between the annular portions, and a pair of circles. The thing provided with the some pocket formed by the ring part and the pillar part adjacent to the circumferential direction is disclosed. Such a cage is usually used in a form in which the outer peripheral surface is guided by the inner peripheral surface of the outer ring (outer ring guide system).
JP 2006-292097 A

外輪案内の転がり軸受用保持器では、保持器の外周面が外輪の内周面に高速で接触することから、保持器の限界ＰＶ値が重要なものとなり、限界ＰＶ値の向上が課題となっている。   In the outer ring guide rolling bearing cage, since the outer peripheral surface of the cage contacts the inner peripheral surface of the outer ring at high speed, the limit PV value of the cage becomes important, and improvement of the limit PV value becomes a problem. ing.

この発明の目的は、限界ＰＶ値を向上させた転がり軸受用保持器および転がり軸受を提供することにある。   An object of the present invention is to provide a rolling bearing cage and a rolling bearing with an improved limit PV value.

この発明による転がり軸受用保持器は、軸方向で平行に対向する１対の円環部と、両円環部間に所定間隔で設けられた複数の柱部と、１対の円環部および周方向に隣り合う柱部によって形成された複数のポケットとを有し、外周面が外輪の内周面で案内される転がり軸受用保持器において、柱部の軸方向両側にある円環部において外輪に案内されるように、ポケットの軸方向両側にある円環部の外周面が柱部の軸方向両側にある円環部の外周面に対して凹まされていることを特徴とするものである。   A rolling bearing retainer according to the present invention includes a pair of annular portions facing in parallel in the axial direction, a plurality of column portions provided between the annular portions at a predetermined interval, a pair of annular portions, In a rolling bearing retainer having a plurality of pockets formed by columns adjacent to each other in the circumferential direction and having an outer peripheral surface guided by an inner peripheral surface of the outer ring, The outer circumferential surface of the annular portion on both sides in the axial direction of the pocket is recessed with respect to the outer circumferential surface of the annular portion on both sides in the axial direction of the column portion so as to be guided by the outer ring. is there.

この発明による転がり軸受は、外輪と、内輪と、両輪間に配置された複数の転動体と、これらの転動体を保持する保持器とを備え、外輪の内周面で保持器の外周面が案内される転がり軸受において、保持器は、軸方向で平行に対向する１対の円環部と、両円環部間に所定間隔で設けられた複数の柱部と、１対の円環部および周方向に隣り合う柱部によって形成された複数のポケットとを有し、柱部の軸方向両側にある円環部において外輪に案内されるように、ポケットの軸方向両側にある円環部の外周面が柱部の軸方向両側にある円環部の外周面に対して凹まされていることを特徴とするものである。   A rolling bearing according to the present invention includes an outer ring, an inner ring, a plurality of rolling elements disposed between the two rings, and a cage that holds these rolling elements, and the outer circumferential surface of the cage is the inner circumferential surface of the outer ring. In the guided rolling bearing, the cage includes a pair of annular portions facing in parallel in the axial direction, a plurality of column portions provided at predetermined intervals between the two annular portions, and a pair of annular portions. And a plurality of pockets formed by column portions adjacent to each other in the circumferential direction, and the ring portions on both sides in the axial direction of the pockets so as to be guided to the outer ring at the ring portions on both sides in the axial direction of the column portions. The outer peripheral surface of the ring portion is recessed with respect to the outer peripheral surface of the annular portion on both sides in the axial direction of the column portion.

ポケットの軸方向両側にある円環部の外周面が柱部の軸方向両側にある円環部の外周面に対して凹まされているようにするには、例えば、ポケットの軸方向両側にある円環部の外周面を軸方向から見て直線状とすればよく、また、これを軸方向から見て凹の曲線状としてもよい。ポケットの軸方向両側にある円環部の外周面が凹まされることで、柱部の軸方向両側にある円環部において外輪に案内されることになり、後述するように、高速回転時の耐久性能（限界ＰＶ値）が向上する。また、凹まされた部分からの軸受内の潤滑油の流入および排出が容易になり、潤滑性向上にも寄与することができる。さらに、凹まされた部分がポケットの軸方向両側にある円環部であるので、軸受内の転動体の部分への潤滑油の流入および排出が容易になる。   In order to make the outer peripheral surfaces of the annular portions on both sides in the axial direction of the pocket recessed relative to the outer peripheral surfaces of the annular portions on both sides in the axial direction of the column portion, for example, on both sides in the axial direction of the pocket The outer peripheral surface of the annular portion may be linear when viewed from the axial direction, or may be a concave curved shape when viewed from the axial direction. Since the outer circumferential surface of the annular part on both sides in the axial direction of the pocket is recessed, the annular part on both sides in the axial direction of the pillar part is guided to the outer ring, and as described later, durability at high speed rotation Performance (limit PV value) is improved. Further, the inflow and discharge of the lubricating oil in the bearing from the recessed portion can be facilitated, which can contribute to improvement of lubricity. Further, since the recessed portions are annular portions on both sides in the axial direction of the pocket, the lubricating oil can be easily introduced into and discharged from the rolling element portion in the bearing.

本発明の転がり軸受用保持器は、玉軸受、ころ軸受等の転がり軸受全般に適用することができる保持器であり、好ましくは、合成樹脂製とされるが、これに限定されるものではない。   The rolling bearing cage of the present invention is a cage that can be applied to all rolling bearings such as ball bearings and roller bearings, and is preferably made of a synthetic resin, but is not limited thereto. .

合成樹脂製保持器を構成する材料としては、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適宜添加される。   Synthetic resin cage materials 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 appropriately added to these resins.

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.

樹脂製の保持器の場合、高速回転下の遠心荷重の作用により、外径側へと変形しやすく、外輪案内での保持器の耐久性確保が重要となる。この発明による保持器は、軸方向で平行に対向する１対の円環部を有しているので、円環部が軸方向一方側だけにある片持ちタイプの樹脂保持器に比べて、高速回転時の変形による保持器と転動体との間の摩擦抵抗が低減され、高速回転での使用に有利となる。ただし、これを外輪案内として高速回転で使用するには、摩擦熱によって摺動部分が溶融を始めるときの圧力Ｐと周速Ｖとの積である限界ＰＶ値の向上が課題となる。   In the case of a resin cage, it is easily deformed to the outer diameter side due to the action of a centrifugal load under high-speed rotation, and ensuring the durability of the cage with the outer ring guide is important. Since the cage according to the present invention has a pair of annular portions facing in parallel in the axial direction, the cage is faster than a cantilever type resin cage in which the annular portion is only on one side in the axial direction. The frictional resistance between the cage and the rolling element due to deformation at the time of rotation is reduced, which is advantageous for use at high speed rotation. However, in order to use this as an outer ring guide at a high speed rotation, improvement of the limit PV value which is the product of the pressure P and the peripheral speed V when the sliding portion starts to melt due to frictional heat becomes a problem.

従来の保持器では、外輪案内とされた場合、ポケットの軸方向両側部分が外輪と接触する面積は、ポケットがない部分（柱部）の軸方向両側部分が外輪と接触する面積に比べて小さいことから、限界ＰＶ値は、ポケットの軸方向両側部分での値となる。これに対し、この発明の保持器によると、ポケットの軸方向両側部分が外輪と接触しないようになされていることで、限界ＰＶ値は、ポケットがない部分の軸方向両側部分での値となり、この部分が外輪と接触する面積が大きいことから、面圧が小さくなり、限界ＰＶ性能が向上する。具体的な一例を挙げると、内輪回転速度２５，０００ｒ／ｍｉｎ（保持器公転速度９，１９２ｒ／ｍｉｎ）でかつ偏心による遠心力が０．６１Ｎ（偏心量呼び値０．１５ｍｍ）の時、限界ＰＶ値は、従来の保持器では、ポケットの軸方向両側部分でも接触することで、２７．８ＭＰａ・ｃｍ／ｓｅｃであり、これに対し、この発明のものでは、ポケットがない部分の軸方向両側部分でしか接触しないことで、１７３ＭＰａ・ｃｍ／ｓｅｃとなり、限界ＰＶ性能が大幅に向上する。   In the conventional cage, when the outer ring guide is used, the area where both axial portions of the pocket are in contact with the outer ring is smaller than the area where both axial portions of the pocket (column portion) are in contact with the outer ring. Therefore, the limit PV value is a value at both side portions in the axial direction of the pocket. On the other hand, according to the cage of the present invention, the limit PV value is a value at both axial side portions of the portion where there is no pocket because the both side portions in the axial direction of the pocket are not in contact with the outer ring. Since this area has a large area in contact with the outer ring, the surface pressure is reduced and the limit PV performance is improved. As a specific example, when the inner ring rotational speed is 25,000 r / min (cage revolution speed 9,192 r / min) and the centrifugal force due to eccentricity is 0.61 N (the eccentric amount nominal value 0.15 mm), the limit PV In the conventional cage, the value is 27.8 MPa · cm / sec by contacting both side portions of the pocket in the axial direction. On the other hand, in the present invention, both side portions in the axial direction of the portion having no pocket are used. By contacting only at 173 MPa, it becomes 173 MPa · cm / sec, and the limit PV performance is greatly improved.

保持器は、例えば、柱部の中程で軸方向２つに分割された第１および第２の分割体から構成される。この場合、各分割体は、円環部と、円環部から軸方向に突出する複数の柱形成部とからなり、各分割体の柱形成部に設けられて半径方向に重なり合う連結部を介して結合されることが好ましい。このようにすると、連結部位置が軸方向全体にわたり均衡をとることができるとともに、連結部同士が半径方向に重なり合うことで耐遠心荷重性および連結力が高められ、分割型であるにもかかわらず、柱形成部の連結部での連結強度、柱部自体の剛性や強度を確保することができる。特に、保持器材料が樹脂製等の剛性や強度が課題とされる材料で構成されても、転動体の収納本数を維持することができるとともに、保持器重量増を来すことなく、変形しにくく、かつ、トルク増大を抑制することができる。したがって、高速回転時の遠心荷重に対する剛性と強度とを確保することが可能となり、これに上記の限界ＰＶ値の向上が付加されることで、高速回転での使用に極めて適したものとなる。保持器は、必ずしも、このような２つの分割体からなるものとする必要はなく、一体型の保持器であってもよい。   The cage is composed of, for example, first and second divided bodies that are divided in the axial direction in the middle of the column portion. In this case, each divided body includes an annular portion and a plurality of column forming portions that protrude in the axial direction from the annular portion, and is provided on the column forming portion of each divided body via a connecting portion that overlaps in the radial direction. Are preferably combined. In this way, the position of the connecting portion can be balanced throughout the entire axial direction, and the connecting portions are overlapped in the radial direction to increase the centrifugal load resistance and the connecting force. It is possible to secure the connection strength at the connection portion of the column forming portion and the rigidity and strength of the column portion itself. In particular, even if the cage material is made of a material such as a resin that is required to have rigidity and strength, the number of rolling elements can be maintained and the cage can be deformed without increasing the weight of the cage. It is difficult and an increase in torque can be suppressed. Therefore, it becomes possible to ensure the rigidity and strength against the centrifugal load at the time of high-speed rotation, and by adding the above-mentioned limit PV value to this, it becomes extremely suitable for use at high-speed rotation. The cage does not necessarily need to be composed of such two divided bodies, and may be an integrated cage.

この発明の転がり軸受用保持器および転がり軸受によると、柱部の軸方向両側にある円環部において外輪に案内されるので、限界ＰＶ値が上昇し、高速回転時の耐久性能が向上する。また、軸受内の潤滑油の流入および排出が容易になり、潤滑性向上にも寄与することができる。   According to the rolling bearing retainer and the rolling bearing of the present invention, since the outer ring is guided at the annular portions on both sides in the axial direction of the column portion, the limit PV value increases and the durability performance at high speed rotation is improved. Further, the inflow and discharge of the lubricating oil in the bearing can be facilitated, which can contribute to improvement of lubricity.

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。   FIG. 1 shows a rolling bearing according to the present invention, and FIGS. 2 to 5 show an embodiment of a rolling bearing cage according to the present invention. In the following description, the left and right refer to the left and right in FIG.

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、両輪(2)(3)間に配置された複数の玉（転動体）(4)と、これらの玉(4)を保持する保持器(5)とよりなる。保持器(5)の案内は、外周面が外輪(2)の内周面で案内される外輪案内方式とされている。   The rolling bearing (1) is a ball bearing and, as shown in FIG. 1, a plurality of balls (rolling elements) (between the outer ring (2), the inner ring (3), and the two rings (2) (3)). 4) and a cage (5) for holding these balls (4). The cage (5) is guided by an outer ring guide system in which the outer circumferential surface is guided by the inner circumferential surface of the outer ring (2).

保持器(5)は、分割式で、軸方向中程で分割された２つの分割体(6)(7)が結合されることによって形成されており、図２に示すように、軸方向で平行に対向する左右の円環部(11)(12)と、両円環部(11)(12)間に所定間隔で設けられた複数の柱部(13)と、左右の円環部(11)(12)および周方向に隣り合う柱部(13)によって形成された複数のポケット(14)とを備えている。   The cage (5) is a split type, and is formed by joining two divided bodies (6) and (7) divided in the middle in the axial direction. As shown in FIG. The left and right circular ring portions (11) and (12) facing each other in parallel, the plurality of column parts (13) provided at predetermined intervals between the two circular ring parts (11) and (12), and the left and right circular ring parts ( 11) (12) and a plurality of pockets (14) formed by pillars (13) adjacent in the circumferential direction.

各ポケット(14)は、４隅が曲面とされた略方形状とされている。   Each pocket (14) has a substantially rectangular shape with curved corners.

円環部(11)(12)は、柱部(13)の軸方向両側にある部分(11a)(12a)と、ポケット(14)の軸方向両側にある部分(11b)(12b)とからなり、ポケット(14)の軸方向両側にある部分(11b)(12b)は、ポケット(14)が形成されている分だけ、柱部(13)の軸方向両側にある部分(11a)(12a)よりも外周面の面積が小さくなっている。そして、この外周面の面積が小さい方のポケット(14)の軸方向両側にある部分(11b)(12b)の外周面は、柱部(13)の軸方向両側にある円環部(11a)(12a)の外周面に対して凹まされている。すなわち、図３に示す一方の分割体(6)を軸方向から見た図において、ポケット面(14)が形成されている円環部(11b)は、外周面が直線状とされており、後述するフック部(19)および係合凹部(20)を有する柱形成部(15)が形成されている円環部(11a)は、外周面が従来と同じ円周面の一部とされている。これにより、保持器(5)は、ポケット(14)の軸方向両側にある円環部(11b)(12b)が外輪(2)内周面と接触することなく、柱部(13)の軸方向両側にある円環部(11a)(12a)において外輪(2)内周面に案内されるようになされている。   The annular part (11) (12) is composed of parts (11a) (12a) on both sides in the axial direction of the column part (13) and parts (11b) (12b) on both sides in the axial direction of the pocket (14). The portions (11b) and (12b) on both sides in the axial direction of the pocket (14) are the portions (11a) and (12a) on the both sides in the axial direction of the column (13), as much as the pocket (14) is formed. The area of the outer peripheral surface is smaller than). And the outer peripheral surface of the portion (11b) (12b) on both sides in the axial direction of the pocket (14) with the smaller area of the outer peripheral surface is the annular portion (11a) on both sides in the axial direction of the column portion (13). It is recessed with respect to the outer peripheral surface of (12a). That is, in the figure which looked at one division body (6) shown in FIG. 3 from the axial direction, the outer peripheral surface of the annular part (11b) in which the pocket surface (14) is formed is linear, An annular part (11a) in which a pillar forming part (15) having a hook part (19) and an engaging concave part (20), which will be described later, is formed is part of the same circumferential surface as the conventional one. Yes. As a result, the cage (5) is configured so that the ring portions (11b) and (12b) on both sides in the axial direction of the pocket (14) do not contact the inner peripheral surface of the outer ring (2), and the shaft of the column portion (13). The annular portions (11a) and (12a) on both sides in the direction are guided to the inner peripheral surface of the outer ring (2).

したがって、この保持器(5)の限界ＰＶ値は、ポケットがない部分の軸方向両側部分での値となり、内輪回転速度２５，０００ｒ／ｍｉｎ（保持器公転速度９，１９２ｒ／ｍｉｎ）でかつ偏心による遠心力が０．６１Ｎ（偏心量呼び値０．１５ｍｍ）の時、限界ＰＶ値は、１７３ＭＰａ・ｃｍ／ｓｅｃとなっている。従来のものでは、ポケットの軸方向両側部分でも接触することで、限界ＰＶ値は２７．８ＭＰａ・ｃｍ／ｓｅｃであり、ポケットの軸方向両側部分を接触させないこの保持器(5)によると、限界ＰＶ性能を大幅に向上することができる。   Therefore, the limit PV value of the cage (5) is a value at both axial side portions of the portion where there is no pocket, and the inner ring rotational speed is 25,000 r / min (cage revolution speed 9,192 r / min) and is eccentric. When the centrifugal force due to is 0.61 N (the eccentric amount nominal value is 0.15 mm), the limit PV value is 173 MPa · cm / sec. In the conventional case, the limit PV value is 27.8 MPa · cm / sec by contacting both side portions of the pocket in the axial direction. According to this cage (5) which does not contact the both side portions of the pocket in the axial direction, PV performance can be greatly improved.

図４および図５は、２つの分割体(6)(7)の結合構造の１例を示している。同図において、左の分割体(6)は、左の円環部(11)と、円環部(11)から軸方向右方に突出する複数の柱形成部(15)とからなり、右の分割体(7)は、右の円環部(12)と、円環部(12)から軸方向左方に突出する複数の柱形成部(16)とからなる。左右の柱形成部(15)(16)は、互いに点対称となるように形成されており、図５に示すように、柱部(13)の軸方向長さの半分よりも大きくかつ先端にフック部(19)が形成された大凸部(17)と、柱部(13)の軸方向長さの半分よりも小さくフック部(19)と係合する係合凹部(20)が形成された小凸部(18)とからなる。そして、左の分割体(6)のフック部(19)が右の分割体(7)の係合凹部(20)に差し込まれるとともに、右の分割体(7)のフック部(19)が左の分割体(6)の係合凹部(20)に差し込まれることにより、左右の分割体(6)(7)同士が結合されている。   4 and 5 show an example of the coupling structure of two divided bodies (6) and (7). In the figure, the left divided body (6) is composed of a left annular part (11) and a plurality of column forming parts (15) protruding axially rightward from the annular part (11). The divided body (7) includes a right annular part (12) and a plurality of column forming parts (16) protruding leftward in the axial direction from the annular part (12). The left and right column forming portions (15) and (16) are formed so as to be point-symmetric with each other and, as shown in FIG. 5, are larger than half the axial length of the column portion (13) and at the tip. A large convex part (17) in which the hook part (19) is formed and an engaging concave part (20) that engages with the hook part (19) smaller than half the axial length of the column part (13) are formed. It consists of small convex parts (18). Then, the hook portion (19) of the left divided body (6) is inserted into the engagement recess (20) of the right divided body (7), and the hook portion (19) of the right divided body (7) is The left and right divided bodies (6) and (7) are joined to each other by being inserted into the engaging recess (20) of the divided body (6).

すなわち、左の分割体(6)のフック部(19)は、右の分割体(7)の係合凹部(20)と、右の分割体(7)のフック部(19)は、左の分割体(6)の係合凹部(20)と、互いに、保持器(5)の半径方向に重ね合わされて相互に係合されることによって、左右の分割体(6)(7)同士が結合されている。   That is, the hook part (19) of the left divided body (6) is the engagement recess (20) of the right divided body (7), and the hook part (19) of the right divided body (7) is the left The left and right divided bodies (6) and (7) are coupled to each other by overlapping the engaging recess (20) of the divided body (6) with each other and overlapping each other in the radial direction of the cage (5). Has been.

なお、図示省略するが、上記の保持器(5)の限界ＰＶ値を向上させるための構成は、分割体(6)(7)の結合構造が上記のものでなくても適用可能であり、また、分割式でない一体型の保持器に対しても適用できる。   Although not shown in the drawings, the configuration for improving the limit PV value of the cage (5) can be applied even if the coupling structure of the divided bodies (6) and (7) is not the above. Further, the present invention can also be applied to an integrated cage that is not divided.

図１は、この発明による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 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、この発明による転がり軸受用保持器の一方の分割体を軸方向から見た図である。FIG. 3 is a view of one divided body of the rolling bearing cage according to the present invention as seen from the axial direction. 図４は、保持器の分割体同士の結合部分を示す部分拡大斜視図である。FIG. 4 is a partially enlarged perspective view showing a coupling portion between the split bodies of the cage. 図５は、同分解斜視図である。FIG. 5 is an exploded perspective view of the same.

符号の説明Explanation of symbols

(1) 玉軸受（転がり軸受）
(2) 外輪
(5) 保持器
(11)(12) 円環部
(13) 柱部
(14) ポケット
(11a)(12a) 柱部の軸方向両側にある円環部
(11b)(12b) ポケットの軸方向両側にある円環部 (1) Ball bearing (rolling bearing)
(2) Outer ring
(5) Cage
(11) (12) Ring part
(13) Column
(14) Pocket
(11a) (12a) Annular parts on both sides of the column in the axial direction
(11b) (12b) Annulus on both sides of pocket

Claims (2)

軸方向で平行に対向する１対の円環部と、両円環部間に所定間隔で設けられた複数の柱部と、１対の円環部および周方向に隣り合う柱部によって形成された複数のポケットとを有し、外周面が外輪の内周面で案内される転がり軸受用保持器において、
柱部の軸方向両側にある円環部において外輪に案内されるように、ポケットの軸方向両側にある円環部の外周面が柱部の軸方向両側にある円環部の外周面に対して凹まされていることを特徴とする転がり軸受用保持器。 It is formed by a pair of annular parts facing in parallel in the axial direction, a plurality of pillar parts provided at a predetermined interval between the two annular parts, a pair of annular parts and a pillar part adjacent in the circumferential direction. A rolling bearing cage in which the outer peripheral surface is guided by the inner peripheral surface of the outer ring.
The outer peripheral surface of the annular part on both axial sides of the pocket is aligned with the outer peripheral surface of the annular part on both axial sides of the column so that it is guided by the outer ring at the annular part on both axial sides of the column part. A cage for a rolling bearing characterized by being recessed. 外輪と、内輪と、両輪間に配置された複数の転動体と、これらの転動体を保持する保持器とを備え、外輪の内周面で保持器の外周面が案内される転がり軸受において、
保持器は、軸方向で平行に対向する１対の円環部と、両円環部間に所定間隔で設けられた複数の柱部と、１対の円環部および周方向に隣り合う柱部によって形成された複数のポケットとを有し、柱部の軸方向両側にある円環部において外輪に案内されるように、ポケットの軸方向両側にある円環部の外周面が柱部の軸方向両側にある円環部の外周面に対して凹まされていることを特徴とする転がり軸受。 In a rolling bearing comprising an outer ring, an inner ring, a plurality of rolling elements arranged between both wheels, and a cage for holding these rolling elements, the outer circumferential surface of the cage is guided by the inner circumferential surface of the outer ring.
The cage includes a pair of annular portions facing in parallel in the axial direction, a plurality of pillar portions provided at predetermined intervals between the two annular portions, a pair of annular portions, and a column adjacent in the circumferential direction. A plurality of pockets formed by the portion, and the outer peripheral surfaces of the annular portions on both sides in the axial direction of the pockets are guided by the outer ring in the annular portions on the both sides in the axial direction of the pillar portions. A rolling bearing characterized in that it is recessed with respect to the outer peripheral surface of the annular part on both axial sides.
JP2007325388A 2007-12-18 2007-12-18 Roller bearing cage and rolling bearing Expired - Fee Related JP5056394B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011196513A (en) * 2010-03-23 2011-10-06 Nsk Ltd Roller bearing
JP2013117238A (en) * 2011-12-01 2013-06-13 Ntn Corp Ball bearing retainer, and ball bearing
DE102017114688A1 (en) 2016-07-05 2018-01-11 Jtekt Corporation roller bearing
US10451112B2 (en) * 2015-11-25 2019-10-22 Schaeffler Technologies AG & Co. KG Ball bearing cage
JP2021067367A (en) * 2021-02-04 2021-04-30 株式会社ジェイテクト Rolling bearing

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JP2001304268A (en) * 2000-04-27 2001-10-31 Koyo Seiko Co Ltd Corrugated holder for rolling bearing
JP2005090658A (en) * 2003-09-18 2005-04-07 Nsk Ltd Rolling bearing
JP2007078090A (en) * 2005-09-14 2007-03-29 Ntn Corp Needle roller bearing

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001304268A (en) * 2000-04-27 2001-10-31 Koyo Seiko Co Ltd Corrugated holder for rolling bearing
JP2005090658A (en) * 2003-09-18 2005-04-07 Nsk Ltd Rolling bearing
JP2007078090A (en) * 2005-09-14 2007-03-29 Ntn Corp Needle roller bearing

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011196513A (en) * 2010-03-23 2011-10-06 Nsk Ltd Roller bearing
JP2013117238A (en) * 2011-12-01 2013-06-13 Ntn Corp Ball bearing retainer, and ball bearing
US10451112B2 (en) * 2015-11-25 2019-10-22 Schaeffler Technologies AG & Co. KG Ball bearing cage
DE102017114688A1 (en) 2016-07-05 2018-01-11 Jtekt Corporation roller bearing
US10247241B2 (en) 2016-07-05 2019-04-02 Jtekt Corporation Rolling bearing
JP2021067367A (en) * 2021-02-04 2021-04-30 株式会社ジェイテクト Rolling bearing

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