JP6349681B2 - Radial roller bearing cage and radial roller bearing - Google Patents

Radial roller bearing cage and radial roller bearing Download PDF

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JP6349681B2
JP6349681B2 JP2013226836A JP2013226836A JP6349681B2 JP 6349681 B2 JP6349681 B2 JP 6349681B2 JP 2013226836 A JP2013226836 A JP 2013226836A JP 2013226836 A JP2013226836 A JP 2013226836A JP 6349681 B2 JP6349681 B2 JP 6349681B2
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roller bearing
portions
rim
cage
radial roller
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豊 石橋
豊 石橋
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NSK Ltd
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Description

本発明は、例えば、自動車用変速機や各種機械装置等の回転支持部に組み込まれるラジアルころ軸受用保持器、及び該保持器を備えたラジアルころ軸受に関する。   The present invention relates to a radial roller bearing retainer incorporated in a rotation support portion of, for example, an automobile transmission or various mechanical devices, and a radial roller bearing provided with the retainer.

例えば、自動車用手動変速機では従来から、図18に示すように、変速用歯車1(特許請求の範囲の外輪相当部材に相当)が、動力伝達軸2(特許請求の範囲の内輪相当部材に相当)の周囲に、ラジアルころ軸受3を介して回転自在に支持される(例えば、特許文献1参照)。このラジアルころ軸受3では、変速用歯車1の内周面に設けた円筒状の外輪軌
道4と、動力伝達軸2の外周面に設けた円筒状の内輪軌道5との間に、複数のころ6が、保持器7により保持された状態で、転動自在に設けられている。なお、内輪軌道5は、動力伝達軸2の外周面に直接設けられてもよく、別途設けた円筒状の内輪の外周面に設けられてもよい。また、変速用歯車1の側方には、シンクロ機構を構成する為の係合歯8が設けられている。
For example, in a conventional manual transmission for an automobile, as shown in FIG. 18, a gear 1 for shifting (corresponding to a member corresponding to an outer ring in claims) is connected to a power transmission shaft 2 (corresponding to a member corresponding to an inner ring in claims). (E.g., equivalent)) is rotatably supported via a radial roller bearing 3 (see, for example, Patent Document 1). In the radial roller bearing 3, a plurality of rollers are provided between a cylindrical outer ring raceway 4 provided on the inner peripheral surface of the transmission gear 1 and a cylindrical inner ring raceway 5 provided on the outer peripheral surface of the power transmission shaft 2. 6 is rotatably provided in a state of being held by the cage 7. The inner ring raceway 5 may be provided directly on the outer peripheral surface of the power transmission shaft 2 or may be provided on the outer peripheral surface of a separately provided cylindrical inner ring. Engagement teeth 8 for constituting a sync mechanism are provided on the side of the transmission gear 1.

また、図18に示す構造の場合、変速用歯車1は、動力伝達軸2の外周面に形成された段部14と、動力伝達軸2の外周面にスプライン係合したシンクロハブ15との間に位置する。シンクロナイザは、このシンクロハブ15と係合歯8とを含んで構成されている。シンクロ機構の非結合時には、変速用歯車1と動力伝達軸2との相対回転が自在となり、変速用歯車1が動力伝達に寄与しない状態となる。これに対して、シンクロ機構の結合時には、変速用歯車1と動力伝達軸2とが同期して回転するようになり、変速用歯車1が動力伝達に寄与する状態となる。なお、シンクロ機構の構成及び作用に関しては、従来から周知であり、本発明の要旨とも関係しない為、詳しい説明は省略する。   Further, in the case of the structure shown in FIG. 18, the transmission gear 1 is between the stepped portion 14 formed on the outer peripheral surface of the power transmission shaft 2 and the synchro hub 15 spline-engaged with the outer peripheral surface of the power transmission shaft 2. Located in. The synchronizer includes the synchronizer hub 15 and the engaging teeth 8. When the synchronization mechanism is not coupled, the relative rotation between the transmission gear 1 and the power transmission shaft 2 becomes free, and the transmission gear 1 does not contribute to power transmission. On the other hand, when the synchro mechanism is coupled, the transmission gear 1 and the power transmission shaft 2 are rotated in synchronization, and the transmission gear 1 is in a state of contributing to power transmission. The configuration and operation of the synchro mechanism are well known in the art and are not related to the gist of the present invention, and thus detailed description thereof is omitted.

上述の様なラジアルころ軸受3に組み込む保持器としては、図19に示す様な所謂分割型の保持器7aを組み込むことが従来から知られている。この保持器7aは、金属製で部分円筒状の2個の保持器素子9、9を、円周方向に並べることにより全体を円筒状に構成する。また、保持器7aは、これら各保持器素子9、9を組み合わせた状態で、軸方向(特に断らない限り、軸方向、径方向とは保持器の軸方向、径方向を言う。本明細書及び特許請求の範囲全体で同じ。)に間隔を開けた状態で互いに同心に配置された、円環状であ
る1対のリム部10、10同士の間に、円周方向に間隔を開けて配置された複数の柱部11、11を掛け渡した状態で設けている。なお、両リム部10、10及びこれら各柱部11、11の外周面は、全周に亙って、同一円筒面上に存在している。
As a cage to be incorporated into the radial roller bearing 3 as described above, it is conventionally known to incorporate a so-called split type cage 7a as shown in FIG. The cage 7a is formed in a cylindrical shape as a whole by arranging two cage elements 9, 9 made of metal and partially cylindrical in the circumferential direction. The cage 7a is a state in which these cage elements 9 and 9 are combined, and the axial direction (unless otherwise noted, the axial direction and the radial direction refer to the axial direction and the radial direction of the cage. And the same throughout the scope of the claims.) Between the pair of ring-shaped rim portions 10 and 10 that are arranged concentrically with each other at an interval in the circumferential direction. The plurality of pillar portions 11, 11 are provided in a state of being spanned. Note that the outer peripheral surfaces of the rim portions 10 and 10 and the respective column portions 11 and 11 exist on the same cylindrical surface over the entire periphery.

そして、円周方向に隣り合う柱部11、11と両リム部10、10とにより囲まれる空間を、それぞれ各ころ6を転動自在に保持する為のポケット12、12としている。各保持器素子9、9の周方向長さの合計は、外輪軌道4と内輪軌道5との間に存在して各ころ6、6を配置する環状空間13(図18参照)の周方向長さよりも少し短くしている。このような構造によれば、環状空間13のうちの非負荷圏(ラジアル荷重が加わるのと反対側部分)に存在する保持器素子9が、円周方向に若干変位可能になる。このため、動力伝達軸2と変速用歯車1とが同期して回転する場合にも、各ころ6、6の転動面と外輪軌道4及び内輪軌道5との接触部を少しずつ移動させることができる為、当該接触部にフレッチング摩耗が生じることを防止できる。   And the space enclosed by the column parts 11 and 11 and the both rim | limb parts 10 and 10 adjacent to the circumferential direction is made into the pockets 12 and 12 for hold | maintaining each roller 6 so that rolling is possible, respectively. The sum of the circumferential lengths of the cage elements 9 and 9 is the circumferential length of the annular space 13 (see FIG. 18) that is located between the outer ring raceway 4 and the inner ring raceway 5 and in which the rollers 6 and 6 are arranged. A little shorter than that. According to such a structure, the cage element 9 existing in the non-load zone (the portion on the opposite side to which the radial load is applied) in the annular space 13 can be slightly displaced in the circumferential direction. Therefore, even when the power transmission shaft 2 and the transmission gear 1 rotate in synchronization, the contact portions between the rolling surfaces of the rollers 6 and 6 and the outer ring raceway 4 and the inner ring raceway 5 are moved little by little. Therefore, fretting wear can be prevented from occurring at the contact portion.

また、例えば特許文献2には、図20に示す様な保持器7bが記載されている。この保持器7bは、1対のリム部10a、10aと複数の柱部11a、11aとを備える。
このうちの1対のリム部10a、10aは、全体を円環状としたものであり、軸方向両端部に、互いに同心且つ平行に配置されている。また、各柱部11a、11aは、それぞれの両端部を両リム部10a、10aの内側面に連続させることにより、これら両リム部10a、10a同士の間に掛け渡された状態で、円周方向に間欠的に設けられている。そして、円周方向に隣り合う柱部11a、11aと両リム部10a、10aとで囲まれる部分を、それぞれころ6、6を保持する為のポケットとしている。
For example, Patent Document 2 describes a cage 7b as shown in FIG. The cage 7b includes a pair of rim portions 10a and 10a and a plurality of pillar portions 11a and 11a.
Of these, the pair of rim portions 10a and 10a are formed in a ring shape as a whole, and are arranged concentrically and parallel to each other at both ends in the axial direction. In addition, each column portion 11a, 11a is arranged in a state in which both end portions are continuous between the inner surfaces of both rim portions 10a, 10a so as to be spanned between these rim portions 10a, 10a. It is provided intermittently in the direction. And the part enclosed by the column parts 11a and 11a and both rim | limb parts 10a and 10a adjacent to the circumferential direction is made into the pocket for hold | maintaining the rollers 6 and 6, respectively.

図20の保持器7bでは、断面形状が略逆M字形に形成されており、各柱部11a、11aを、各ころ6、6のピッチ円よりも径方向外方に配置された状態で、軸方向中央部に設けられた外径寄り部分18(特許請求の範囲の大径部に相当)と、各ころ6、6のピッチ円よりも径方向内方に配置された状態で、軸方向両端部に設けられた内径寄り部分19、19(特許請求の範囲の小径部に相当)とを、傾斜部20、20(特許請求の範囲の連続部に相当)により連続させて成る形状としている。   In the cage 7b of FIG. 20, the cross-sectional shape is formed in a substantially inverted M shape, and each column portion 11a, 11a is arranged radially outward from the pitch circle of each roller 6, 6, In the axial direction in a state where it is disposed radially inward from the pitch circle of each of the rollers 6 and 6 and the outer diameter close portion 18 (corresponding to the large diameter portion of the claims) provided in the central portion in the axial direction. It is made into the shape which continues the inner diameter side part 19 and 19 (equivalent to the small diameter part of a claim) provided in both ends by the inclination parts 20 and 20 (equivalent to the continuous part of a claim). .

また、円周方向に隣り合う各柱部11a、11aの互いに対向する側縁部のうち、外径寄り部分18、18と各内径寄り部分19、19とには、互いに近づく方向に突出した内径側、外径側両係合部(図示せず)が形成されている。このようにして、保持器7bの周方向に関する、各ポケットの幅寸法を、各内径寄り部分19、19及び各外径寄り部分18、18で、各ころ6、6の最大径よりも僅かに小さくしている。従って、各ころ6、6は、それぞれの転動面と、各ポケットの開口縁部を構成する、内径側、外径側両係合部の周方向端縁との係合に基づいて、各ポケットからの脱落を防止されている。また、このような保持器7bでは、上記の脱落防止構造は、各ポケットを形成する為のピアス加工と同時に形成されている。   Further, of the side edge portions of the column portions 11a and 11a that are adjacent to each other in the circumferential direction, the outer diameter closer portions 18 and 18 and the inner diameter closer portions 19 and 19 have inner diameters protruding in a direction approaching each other. Both side and outer diameter side engaging portions (not shown) are formed. In this way, the width dimension of each pocket in the circumferential direction of the cage 7b is slightly smaller than the maximum diameter of each roller 6, 6 at each inner diameter portion 19, 19 and each outer diameter portion 18, 18. It is small. Therefore, each roller 6, 6 is based on the engagement between the respective rolling surfaces and the circumferential edges of both the inner diameter side and outer diameter side engaging portions constituting the opening edge of each pocket. It is prevented from falling out of the pocket. Moreover, in such a retainer 7b, the above-described drop-off preventing structure is formed simultaneously with the piercing process for forming each pocket.

また、上述の様な変速用歯車1と動力伝達軸2との間に設けた、ラジアルころ軸受3は、シンクロナイザを結合せず、変速用歯車1が動力伝達に寄与しない状態では、変速用歯車1と動力伝達軸2とを高速で相対回転させる。この状態では、当然に、ラジアルころ軸受3部分に十分な量の潤滑油を流通させる必要がある。これに対して、変速用歯車1が動力伝達に寄与する状態では、ラジアルころ軸受3は、変速用歯車1と動力伝達軸2との相対回転を許容する必要はない。但し、この状態では、各ころ6の転動面と外輪軌道4及び内輪軌道5との各接触部で微小な往復滑りが発生する。この様な微小な往復滑りに拘らず、これら各接触部でフレッチングが発生することを防止する為には、シンクロ機構が結合されて、変速用歯車1と動力伝達軸2とが同期して回転する状態でも、ラジアルころ軸受3部分に十分な量の潤滑油を流通させる必要がある。   Further, the radial roller bearing 3 provided between the speed change gear 1 and the power transmission shaft 2 as described above does not connect the synchronizer, and the speed change gear 1 does not contribute to power transmission. 1 and the power transmission shaft 2 are relatively rotated at high speed. In this state, naturally, it is necessary to circulate a sufficient amount of lubricating oil in the radial roller bearing 3 portion. On the other hand, in a state where the transmission gear 1 contributes to power transmission, the radial roller bearing 3 does not need to allow relative rotation between the transmission gear 1 and the power transmission shaft 2. However, in this state, a minute reciprocal slip occurs at each contact portion between the rolling surface of each roller 6 and the outer ring raceway 4 and the inner ring raceway 5. In order to prevent fretting from occurring at these contact portions regardless of such a small reciprocating slip, a synchronizing mechanism is coupled, and the transmission gear 1 and the power transmission shaft 2 rotate in synchronization. Even in such a state, it is necessary to distribute a sufficient amount of lubricating oil to the radial roller bearing 3 portion.

このため、従来、図18に示すように、動力伝達軸2の内側中心部には潤滑油の供給路16が形成されている。そして、供給路16にその内端部を通じさせた分岐流路17の外端部が、ラジアルころ軸受3に向けて開口している。自動車の走行時には、変速機に組み込まれたポンプの作用に基づいて潤滑油を供給路16内に送り込み、分岐流路17を通じてラジアルころ軸受3部分に送り込んで、このラジアルころ軸受3を潤滑する。このため、一般的な使用条件下では、シンクロ機構が結合されているか否かに関係なく、ラジアルころ軸受3内に十分な量の潤滑油を流通させる。   For this reason, conventionally, as shown in FIG. 18, a lubricating oil supply passage 16 is formed in the center of the inner side of the power transmission shaft 2. The outer end portion of the branch flow path 17 that is passed through the inner end portion of the supply passage 16 opens toward the radial roller bearing 3. When the automobile is running, the lubricating oil is fed into the supply passage 16 based on the action of a pump incorporated in the transmission, and fed into the radial roller bearing 3 through the branch passage 17 to lubricate the radial roller bearing 3. For this reason, a sufficient amount of lubricating oil is circulated in the radial roller bearing 3 regardless of whether the synchro mechanism is coupled or not under general use conditions.

また、分岐流路17からラジアルころ軸受3部分に送り込まれた潤滑油は、その後、遠心力に基づいて外輪軌道4に押し付けられてから、この外輪軌道4と両リム部10の外周面との間の隙間を通じて周囲に排出される。そして、排出された潤滑油は、例えば、変速用歯車1の側面と段部14との摺接部、変速用歯車1の噛合部、或いは、係合歯8の噛合部等を潤滑する。このため、潤滑油がラジアルころ軸受3を通過できるように、外輪軌道4と両リム部10、10の外周面との間に、潤滑油を排出する為の隙間を確保することが要求される。   The lubricating oil fed from the branch flow path 17 to the radial roller bearing 3 portion is then pressed against the outer ring raceway 4 based on centrifugal force, and then the outer ring raceway 4 and the outer peripheral surfaces of the rim portions 10 It is discharged to the surroundings through the gap. The discharged lubricating oil lubricates, for example, the sliding contact portion between the side surface of the transmission gear 1 and the stepped portion 14, the meshing portion of the transmission gear 1, or the meshing portion of the engagement teeth 8. For this reason, it is required to secure a gap for discharging the lubricating oil between the outer ring raceway 4 and the outer peripheral surfaces of the rim portions 10 and 10 so that the lubricating oil can pass through the radial roller bearing 3. .

特開2009−85401号公報JP 2009-85001 A 特開2007−255494号公報JP 2007-255494 A

ところで、潤滑油がラジアルころ軸受3を通過できるように、外輪軌道4と両リム部10、10の外周面との間に、潤滑油を排出するための隙間を確保するには、一体型の保持器の場合には、両リム部の内周面と動力伝達軸2の外周面との係合によりこの保持器の径方向に関する姿勢(位置)を規制する所謂内輪案内の構造を採用することにより、隙間を確保することができる。一方で、上述の様な分割型の保持器7aの場合、内輪案内の構造を採用したとしても、使用時の遠心力に基づいて、各保持器素子9、9(両リム部10、10)の外周面がそれぞれ外輪軌道4に押し付けられてしまい、隙間を確保することが困難な場合がある。なお、保持器の外周面と外輪軌道との係合によりこの保持器の姿勢を規制する所謂外輪案内の構造を採用した場合には、一体型及び分割型の保持器の何れの構造を採用した場合でも、隙間を十分に確保することは困難である。また、金属製の保持器において、各ころ6の転動面と各ポケット12、12の内面との係合に基づいて、保持器の径方向に関する姿勢を規制する所謂転動体案内の構造を採用した場合、隙間を確保する面では有利になるが、各ころ6と各ポケット12、12との係合部に焼き付きが発生する可能性が高くなってしまう。   By the way, in order to ensure a gap for discharging the lubricating oil between the outer ring raceway 4 and the outer peripheral surfaces of both the rim portions 10 and 10 so that the lubricating oil can pass through the radial roller bearing 3, In the case of a cage, a so-called inner ring guide structure is employed in which the attitude (position) in the radial direction of the cage is regulated by the engagement between the inner circumferential surfaces of both rim portions and the outer circumferential surface of the power transmission shaft 2. Thus, a gap can be secured. On the other hand, in the case of the split-type cage 7a as described above, each cage element 9, 9 (both rim portions 10, 10) is based on the centrifugal force at the time of use even if the inner ring guide structure is adopted. May be pressed against the outer ring raceway 4, and it may be difficult to secure a gap. In addition, when adopting a so-called outer ring guide structure that regulates the attitude of the cage by engaging the outer peripheral surface of the cage with the outer ring raceway, either an integral type or a split type cage is adopted. Even in this case, it is difficult to ensure a sufficient gap. Further, in a metal cage, a so-called rolling element guide structure is adopted that regulates the attitude of the cage in the radial direction based on the engagement between the rolling surfaces of the rollers 6 and the inner surfaces of the pockets 12 and 12. In this case, it is advantageous in terms of securing a gap, but there is a high possibility that seizure will occur at the engaging portion between each roller 6 and each pocket 12, 12.

また、特許文献2では、ころの脱落を防止する逆M型保持器7bについて開示されているが、逆M型保持器を分割型とした構造は、前述した特許文献1及び2の何れにも記載されていない。   Further, Patent Document 2 discloses an inverted M-type cage 7b that prevents the rollers from falling off. However, the structure in which the inverted M-type cage is a split type is disclosed in any of Patent Documents 1 and 2 described above. Not listed.

本発明は、上述した課題に鑑みてなされたものであり、その目的は、フレッチングの防止を図れると共に、ラジアルころ軸受内を潤滑した潤滑油を、ラジアルころ軸受の周辺に配置された部材に効率良く供給できるラジアルころ軸受用保持器及びラジアルころ軸受を提供することにある。   The present invention has been made in view of the above-described problems, and an object of the present invention is to prevent fretting and to efficiently apply lubricating oil lubricated inside the radial roller bearing to members disposed around the radial roller bearing. An object of the present invention is to provide a radial roller bearing cage and a radial roller bearing that can be supplied well.

本発明の上記目的は、下記の構成によって達成される。
(1) 軸方向に間隔を開けて設けられた円弧状の1対のリム部と、該両リム部間に円周方向に間隔を開けて配置された複数の柱部とを備え、それぞれが部分円筒形で、金属製の複数の保持器素子を有し、
該複数の保持器素子を組み合わせることで、全体を円筒状に構成し、円周方向に隣り合う前記柱部と前記両リム部とによりそれぞれ画成される複数のポケットに、各ころが転動自在に保持されるラジアルころ軸受用保持器であって、
前記各柱部は、前記各ころのピッチ円よりも径方向外方に配置される状態で軸方向中間部に設けられた大径部と、前記各ころのピッチ円よりも径方向内方に配置される状態で軸方向両端部に設けられた小径部と、前記大径部と前記各小径部とを軸方向に連続させた連続部とを備え、
前記リム部の径方向厚さは、前記柱部の半径方向厚さよりも大きく、
前記各柱部の小径部には、前記リム部と連続する部分に、その外径が前記リム部の外径寸法と同じであり、且つ、その半径方向肉厚が前記リム部の径方向肉厚と同じである突出部がそれぞれ設けられ、
前記突出部の軸方向内側側面は、前記柱部の小径部の外周面から垂直方向に立ち上がって形成され、
円周方向に関して前記各柱部と整合する部分で、且つ、前記各突出部及び前記両リム部の外周面には、リム部通油溝が軸方向に沿って形成されていることを特徴とするラジアルころ軸受用保持器。
(2) 前記各柱部の大径部の外径寸法は、前記両リム部の外径寸法よりも小さいことを特徴とする(1)に記載のラジアルころ軸受用保持器。
(3) 前記各柱部の大径部の外周面には、軸方向に沿って延びる柱部通油溝が形成されていることを特徴とする(1)又は(2)に記載のラジアルころ軸受用保持器。
(4) 前記各柱部には、半径方向に貫通し、且つ、前記ポケットの形状と異なる通油用穴部が形成されていることを特徴とする(1)又は(2)に記載のラジアルころ軸受用保持器。
(5) 内周面に円筒状の外輪軌道を設けた外輪相当部材と、
外周面に円筒状の内輪軌道を設けた内輪相当部材と、
前記外輪軌道と前記内輪軌道との間に転動自在に設けられた複数のころと、
前記各ころを保持する保持器とを備えたラジアルころ軸受であって、
前記保持器が、(1)〜(4)のいずれかに記載のラジアルころ軸受用保持器であることを特徴とするラジアルころ軸受。
The above object of the present invention is achieved by the following configurations.
(1) A pair of arc-shaped rim portions provided at intervals in the axial direction, and a plurality of column portions disposed at intervals in the circumferential direction between the rim portions, Partially cylindrical, with a plurality of metal cage elements,
By combining the plurality of cage elements, the entire roller is configured in a cylindrical shape, and each roller rolls into a plurality of pockets respectively defined by the column portions and the rim portions adjacent in the circumferential direction. A radial roller bearing cage that is freely held,
Each of the column portions is arranged at a radially outer side than the pitch circle of each roller in a state of being arranged radially outward, and radially inward of the pitch circle of each roller. A small-diameter portion provided at both axial ends in a state of being disposed, and a continuous portion in which the large-diameter portion and each small-diameter portion are continuous in the axial direction,
The radial thickness of the rim portion is larger than the radial thickness of the column portion,
The small-diameter portion of each column portion has an outer diameter that is the same as the outer diameter dimension of the rim portion at a portion continuous with the rim portion, and a radial thickness of the rim portion. Protrusions that are the same as the thickness are each provided,
The axially inner side surface of the protruding portion is formed to rise in the vertical direction from the outer peripheral surface of the small diameter portion of the column portion,
A rim oil passage groove is formed along the axial direction on the outer peripheral surface of each of the protrusions and the rims at a portion aligned with the pillars in the circumferential direction. Radial roller bearing retainer.
(2) The radial roller bearing retainer according to (1), wherein an outer diameter size of a large diameter portion of each of the column portions is smaller than an outer diameter size of both the rim portions.
(3) The radial roller according to (1) or (2), wherein a column oil passage groove extending along the axial direction is formed on an outer peripheral surface of the large diameter portion of each column portion. Bearing cage.
(4) The radial according to (1) or (2) , wherein each of the pillars is formed with an oil passage hole that penetrates in a radial direction and is different from the shape of the pocket. Roller bearing cage.
(5) an outer ring equivalent member having a cylindrical outer ring raceway on the inner peripheral surface;
An inner ring equivalent member having a cylindrical inner ring raceway on the outer peripheral surface;
A plurality of rollers provided in a freely rollable manner between the outer ring raceway and the inner ring raceway;
A radial roller bearing comprising a cage for holding the rollers,
A radial roller bearing, wherein the cage is a radial roller bearing cage according to any one of (1) to (4).

上述のように構成する本発明のラジアルころ軸受用保持器によれば、分割型の保持器として、保持器を複数の保持器素子により構成しているので、フレッチングの防止を図ることができる。即ち、外輪軌道と内輪軌道との間に存在して各ころを配置する環状空間のうちの、非負荷圏(ラジアル荷重が加わるのと反対側部分)に存在する保持器素子が、円周方向に若干変位可能になる。このため、使用時において、各ころの転動面と、外輪軌道及び内輪軌道との接触部が少しずつ移動する。この結果、当該接触部にフレッチング摩耗が生じることを防止できる。   According to the radial roller bearing cage of the present invention configured as described above, since the cage is constituted by a plurality of cage elements as the split type cage, fretting can be prevented. That is, the cage element that exists in the non-load zone (the opposite side to which the radial load is applied) of the annular space between the outer ring raceway and the inner ring raceway in which the rollers are arranged is circumferential. Can be slightly displaced. For this reason, at the time of use, the contact part of the rolling surface of each roller, the outer ring raceway, and the inner ring raceway moves little by little. As a result, fretting wear can be prevented from occurring at the contact portion.

また、リム部の径方向厚さは、柱部の半径方向厚さよりも大きく、各柱部の小径部には、リム部と連続する部分に、その外径がリム部の外径寸法と同じであり、且つ、その半径方向肉厚がリム部の径方向肉厚と同じである突出部がそれぞれ設けられ、突出部の軸方向内側側面は、柱部の小径部の外周面から垂直方向に立ち上がって形成され、円周方向に関して各柱部と整合する部分で、且つ、前記各突出部及び両リム部の外周面に、リム部通油溝が軸方向に沿って形成されているので、ラジアルころ軸受内を潤滑した潤滑油を、効率良くこのラジアルころ軸受の周辺に配置された部材に供給することができる。即ち、本発明の場合、使用時に各保持器素子が遠心力に基づいて、外輪軌道に押し付けられた場合でも、ラジアルころ軸受を潤滑した潤滑油を、このラジアルころ軸受の内部空間から外部空間へ、リム部通油溝を通じて排出することができる。特に、本発明の場合、断面形状が略逆M字形の保持器の使用状態において、潤滑油が滞留し易い外輪軌道と各柱部の外周面との間の空間(内部空間)に存在する潤滑油を、両リム部の軸方向外方の空間(外部空間)に効率良く排出できる。 In addition, the radial thickness of the rim portion is larger than the radial thickness of the column portion, and the outer diameter of the small-diameter portion of each column portion is the same as the outer diameter dimension of the rim portion at a portion continuous with the rim portion. Each of which has a radial thickness equal to the radial thickness of the rim portion, and the axially inner side surface of the protruding portion extends vertically from the outer peripheral surface of the small-diameter portion of the column portion. Since the rim oil passage groove is formed along the axial direction on the outer circumferential surface of each protruding portion and both rim portions, the rim portion is formed to rise and is aligned with each column portion in the circumferential direction. Lubricating oil that has lubricated the inside of the radial roller bearing can be efficiently supplied to members disposed around the radial roller bearing. That is, in the case of the present invention, even when each cage element is pressed against the outer ring raceway due to centrifugal force during use, the lubricating oil that lubricates the radial roller bearing is transferred from the inner space to the outer space of the radial roller bearing. The oil can be discharged through the rim oil passage groove. In particular, in the case of the present invention, in the use state of the cage having a substantially inverted M-shaped cross section, the lubrication existing in the space (internal space) between the outer ring raceway where the lubricating oil tends to stay and the outer peripheral surface of each column part. Oil can be efficiently discharged into the space (external space) that is axially outward of both rim portions.

(a)は、本発明の第1実施形態に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to the first embodiment of the present invention, and (b) is a front view of the radial roller bearing retainer viewed from the axially outer side. FIG. (a)は、図1(b)のII−II線に沿った断面図であり、(b)は、(a)のII´部拡大図である。(A) is sectional drawing which followed the II-II line | wire of FIG.1 (b), (b) is the II 'part enlarged view of (a). (a)は、本発明の第1実施形態の第1変形例に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to the first modification of the first embodiment of the present invention, and (b) is a view of the radial roller bearing retainer from the outside in the axial direction. FIG. (a)は、本発明の第1実施形態の第2変形例に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to the second modification of the first embodiment of the present invention, and (b) is a view of the radial roller bearing retainer from the outside in the axial direction. FIG. (a)は、図4(b)のV−V線に沿った断面図であり、(b)は、(a)のV´部拡大図である。(A) is sectional drawing along the VV line of FIG.4 (b), (b) is the V 'part enlarged view of (a). (a)は、本発明の第1実施形態の第3変形例に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to a third modification of the first embodiment of the present invention, and (b) is a view of the radial roller bearing retainer from the outside in the axial direction. FIG. (a)は、図6(b)のVII−VII線に沿った断面図であり、(b)は、(a)のVII´部拡大図である。(A) is sectional drawing along the VII-VII line of FIG.6 (b), (b) is the VII 'part enlarged view of (a). (a)は、本発明の第1実施形態の第4変形例に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to a fourth modification of the first embodiment of the present invention, and (b) is a view of the radial roller bearing retainer from the outside in the axial direction. FIG. (a)は、図8(b)のIX−IX線に沿った断面図であり、(b)は、(a)のIX´部拡大図である。(A) is sectional drawing along the IX-IX line of FIG.8 (b), (b) is the IX 'part enlarged view of (a). (a)は、本発明の第2実施形態に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to the second embodiment of the present invention, and (b) is a front view of the radial roller bearing retainer viewed from the axially outer side. FIG. (a)は、図10(b)のXI−XI線に沿った断面図であり、(b)はXI´部拡大図である。(A) is sectional drawing along the XI-XI line of FIG.10 (b), (b) is a XI 'part enlarged view. (a)は、本発明の第2実施形態の変形例に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of a radial roller bearing retainer according to a modification of the second embodiment of the present invention, and (b) is a state in which the radial roller bearing retainer is viewed from the outside in the axial direction. FIG. (a)は、図12(b)のXIII−XIII線に沿った断面図であり、(b)は、XIII´部拡大図である。(A) is sectional drawing along the XIII-XIII line of FIG.12 (b), (b) is a XIII 'part enlarged view. (a)は、本発明の第3実施形態に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to the third embodiment of the present invention, and (b) is a front view showing the radial roller bearing retainer as viewed from the outside in the axial direction. FIG. (a)は、図14(b)のXV−XV線に沿った断面図であり、(b)は、(a)のXV´部拡大図である。(A) is sectional drawing along the XV-XV line of FIG.14 (b), (b) is the XV 'part enlarged view of (a). (a)は、本発明の第3実施形態の変形例に係る、ラジアルころ軸受用保持器の斜視図であり、(b)は、ラジアルころ軸受用保持器を軸方向外方から見た状態で示す正投影図である。(A) is a perspective view of the radial roller bearing retainer according to a modification of the third embodiment of the present invention, and (b) is a state in which the radial roller bearing retainer is viewed from the outside in the axial direction. FIG. (a)は、図16(b)のXVII−XVII線に沿った断面図であり、(b)は、(a)のXVII´部拡大図である。(A) is sectional drawing along the XVII-XVII line of FIG.16 (b), (b) is the XVII 'part enlarged view of (a). 本発明の対象となるラジアルころ軸受を組み込んだ自動車用手動変速機の1例を示す部分断面図である。1 is a partial cross-sectional view showing an example of an automotive manual transmission incorporating a radial roller bearing that is an object of the present invention. 従来構造の保持器の第1例を示す斜視図である。It is a perspective view which shows the 1st example of the holder | retainer of a conventional structure. 同第2例の保持器を示す断面図である。It is sectional drawing which shows the holder | retainer of the 2nd example.

以下、本発明の各実施形態に係るラジアルころ軸受用保持器、及びラジアルころ軸受について図面を参照して詳細に説明する。   Hereinafter, a radial roller bearing retainer and a radial roller bearing according to each embodiment of the present invention will be described in detail with reference to the drawings.

[第1実施形態]
図1及び図2は、本発明の第1実施形態に係るラジアルころ軸受用保持器を示している。なお、本発明の特徴は、断面形状が略逆M字形の保持器7cを分割型にすると共に、この保持器7cに後述するリム部通油溝23、23を設けた点にある。この特徴部分以外の基本的な構造は、図20に示した従来構造の保持器7bを含め、従来から知られている断面形状が略逆M字形のラジアルころ軸受用保持器の構造とほぼ同様であるから、従来と同様に構成する部分に就いては説明を省略若しくは簡略にし、以下、本実施形態の特徴部分を中心に説明する。
[First Embodiment]
1 and 2 show a radial roller bearing retainer according to a first embodiment of the present invention. The feature of the present invention is that the cage 7c having a substantially inverted M-shaped cross section is divided, and the cage 7c is provided with rim oil passage grooves 23 and 23 to be described later. The basic structure other than this characteristic part, including the conventional cage 7b shown in FIG. 20, is almost the same as the structure of a radial roller bearing cage having a generally inverted M-shaped cross-section known conventionally. Therefore, the description of the parts that are configured in the same manner as in the prior art will be omitted or simplified, and the following description will focus on the characteristic parts of the present embodiment.

ラジアルころ軸受用保持器7cは、部分円筒状(略半円筒状)の2個の保持器素子9a、9aを、円周方向に並べることにより全体を円筒状に構成している。保持器素子9a、9aは、軸方向に間隔を開けて設けられた円弧状の1対のリム部10b、10bと、該両リム部10b、10b間に円周方向に間隔を開けて配置された複数の柱部11b、11bとを備える。1対のリム部10b、10bは、断面が矩形状であり、両保持器素子9a、9aを組み合わせた状態で、全体を円環状としている。   The radial roller bearing retainer 7c has a cylindrical shape as a whole by arranging two retainer elements 9a, 9a having a partial cylindrical shape (substantially semi-cylindrical shape) in the circumferential direction. The cage elements 9a, 9a are arranged in a pair of arc-shaped rim portions 10b, 10b provided at intervals in the axial direction, and spaced apart in the circumferential direction between the rim portions 10b, 10b. And a plurality of column portions 11b and 11b. The pair of rim portions 10b and 10b have a rectangular cross section, and the whole rim portion 10b and 10b has an annular shape in a state where both the cage elements 9a and 9a are combined.

そして、2個の保持器素子9a、9aを組み合わせることで、全体を円筒状に構成され、円周方向に隣り合う柱部11b、11bと両リム部10b、10bとによりそれぞれ画成される複数のポケット12b、12bには、各ころ6(図18参照)が転動自在に保持される。   A plurality of cage elements 9a, 9a are combined to form a cylindrical shape as a whole, and are defined by the column portions 11b, 11b and both rim portions 10b, 10b adjacent to each other in the circumferential direction. Each of the rollers 6 (see FIG. 18) is rotatably held in the pockets 12b and 12b.

また、各柱部11b、11bの形状は、全体を屈曲させた形状を有しており、各ころ6、6のピッチ円よりも径方向外方に配置された状態で、軸方向中間部に設けられた外径寄り部分18a、18a(特許請求の範囲の大径部に相当)と、各ころ6、6のピッチ円よりも径方向内方に配置された状態で、軸方向両端部に設けられた内径寄り部分19a、19a(特許請求の範囲の小径部に相当)と、外径寄り部分18a、18aと内径寄り部分19a、19aとを連続させる傾斜部20a、20a(特許請求の範囲の連続部に相当)と、を備える。   Moreover, the shape of each pillar part 11b, 11b has the shape which bent the whole, and it is in the axial direction intermediate part in the state arrange | positioned radially outward rather than the pitch circle of each roller 6,6. In the state where it is arranged radially inward from the pitch outer circle portions 18a, 18a (corresponding to the large diameter portion of the claims) provided and the pitch circles of the rollers 6, 6, it is provided at both axial ends. Inclined portions 20a, 20a (continuous to the inner diameter portions 19a, 19a (corresponding to the small diameter portion of the claims) provided) and the outer diameter portions 18a, 18a and the inner diameter portions 19a, 19a. Corresponding to a continuous portion of).

また、円周方向に隣り合う各柱部11b、11bの互いに対向する側縁部のうち、外径寄り部分18a、18aと各内径寄り部分19a、19aとにそれぞれ、互いに近づく方向に突出した外径側、内径側両係合部21a、22aを形成して、各ころ6、6が、各ポケット12b、12bから脱落することを防止している。   Further, of the side edges of the column portions 11b, 11b that are adjacent to each other in the circumferential direction, the outer portions protruding in the directions approaching the outer diameter closer portions 18a, 18a and the inner diameter closer portions 19a, 19a, respectively. Both the diameter side and inner diameter side engaging portions 21a and 22a are formed to prevent the rollers 6 and 6 from dropping from the pockets 12b and 12b.

特に、本実施形態の場合、両リム部10b、10bの外周面に、複数個(柱部11b、11bの数の2倍)のリム部通油溝23、23を形成している。この様な各リム部通油溝23、23は、断面形状が略半円形であり、両リム部10b、10bの外周面のうち、円周方向に関して各柱部11b、11bと整合する部分の一部(中央部)に、これら両リム部10b、10bの軸方向の全長に亙り形成しており、両リム部10b、10bの軸方向両側に開口している。   In particular, in the case of this embodiment, a plurality of rim portion oil passage grooves 23 and 23 (twice the number of column portions 11b and 11b) are formed on the outer peripheral surfaces of both rim portions 10b and 10b. Each of the rim portion oil passage grooves 23 and 23 has a substantially semicircular cross-sectional shape and is a portion of the outer peripheral surface of both the rim portions 10b and 10b that is aligned with the column portions 11b and 11b in the circumferential direction. A part (center portion) is formed over the entire axial length of both rim portions 10b and 10b, and is open on both axial sides of both rim portions 10b and 10b.

また、保持器7cは、金属製の素材に塑性加工或いは削り加工を施して得た中間素材に、ピアス(プレスによる打ち抜き)加工を施すことにより、上述の様な脱落防止構造を備えた各ポケット12b、12bを形成する。なお、各リム部通油溝23、23は、切削加工或いは潰し加工により形成する。   In addition, the cage 7c is provided with each pocket having the above-described drop-off prevention structure by performing piercing (punching with a press) process on an intermediate material obtained by subjecting a metal material to plastic working or cutting. 12b and 12b are formed. Each rim oil passage groove 23 is formed by cutting or crushing.

上述の様なラジアルころ軸受用保持器7cは、各ポケット12b、12bの内側に各ころ6、6を転動自在に保持した状態で、図18に示した様な、自動車用手動変速機を構成する変速用歯車1の外輪軌道4と、同じく動力伝達軸2の内輪軌道5との間に組み込まれて、ラジアルころ軸受を構成する。   The radial roller bearing retainer 7c as described above is a manual transmission for an automobile as shown in FIG. 18 in a state where the rollers 6 and 6 are rotatably held inside the pockets 12b and 12b. A radial roller bearing is configured by being incorporated between the outer ring raceway 4 of the speed change gear 1 and the inner ring raceway 5 of the power transmission shaft 2.

また、このように組み込まれた状態で、本実施形態のラジアルころ軸受用保持器7cの場合、この保持器7cの外周面(両リム部10b、10bの外周面)と外輪軌道4(図18)とを、摺接若しくは近接対向させることにより、保持器7cの姿勢を外輪案内により規制されている。   Further, in the case of the radial roller bearing retainer 7c of this embodiment in the state of being assembled in this manner, the outer peripheral surface of the retainer 7c (the outer peripheral surfaces of the rim portions 10b and 10b) and the outer ring raceway 4 (FIG. 18). ) In sliding contact or close proximity to each other, the attitude of the cage 7c is regulated by the outer ring guide.

また、本実施形態の場合、図2に示すように、使用状態において、各リム部通油溝23、23の底部と、外輪軌道4との間に、軸方向両側に開口した通油用空間26、26を設けることができる。即ち、各通油用空間26、26は、各柱部11b、11bの外周面と、外輪軌道4との間の内部空間27と、両リム部10b、10bの軸方向外方(リム部に関して「軸方向外」とは、柱部と対向しない側を言い、同じく「軸方向内」とは、柱部と対向する側を言う。本明細書全体で同じ。)の外部空間28、28とを連通している。   In the case of this embodiment, as shown in FIG. 2, an oil passage space opened on both sides in the axial direction between the bottom portion of each rim portion oil passage groove 23, 23 and the outer ring raceway 4 in use. 26, 26 can be provided. That is, each of the oil passing spaces 26, 26 is formed in the inner space 27 between the outer peripheral surface of each of the pillar portions 11b, 11b and the outer ring raceway 4 and the axially outward direction (with respect to the rim portion). “Outside in the axial direction” refers to the side that does not face the column part, and “Inside in the axial direction” refers to the side that faces the column part. Is communicated.

各外径寄り部分18a、18aの外径寸法D18aは、両リム部10b、10bの外径
寸法D10bよりも小さく設定されている(D10b>D18a)。これにより、各柱部
11b、11bの外周面と、外輪軌道4との間の内部空間27における通油性を向上することができる。
また、各外径寄り部分18a、18aの外径寸法D18aは、通油性をさらに向上する
ために、リム部通油溝23,23の溝底径D23よりも小さく設定されるほうがより好ま
しいが、ころ6、6の動き量も考慮して設定される必要がある。
なお、各外径寄り部分18a、18aの外径寸法D18aと、両リム部10b、10b
の外径寸法D10bとの寸法関係(D10b>D18a)、及び各外径寄り部分18a、
18aの外径寸法D18aと、リム部通油溝23,23の溝底径D23との寸法関係(D
23>D18a)は、後述の各変形例及び各実施形態においても適用される。
The outer diameter dimension D 18a of each outer diameter portion 18a, 18a is set smaller than the outer diameter dimension D 10b of both rim portions 10b, 10b (D 10b > D 18a ). Thereby, the oil permeability in the internal space 27 between the outer peripheral surface of each pillar part 11b and 11b and the outer ring track 4 can be improved.
In addition, it is more preferable that the outer diameter dimension D 18a of each outer diameter portion 18a, 18a is set smaller than the groove bottom diameter D23 of the rim oil passage groove 23, 23 in order to further improve the oil permeability. However, it is necessary to set the amount of movement of the rollers 6 and 6 in consideration.
It should be noted that the outer diameter dimension D 18a of each outer diameter portion 18a, 18a and both rim portions 10b, 10b.
Dimensional relationship between the outer diameter D 10b (D 10b> D 18a ), and Kakusoto径寄Ri moiety 18a,
Dimensional relationship between outer diameter dimension D 18a of 18a and groove bottom diameter D 23 of rim oil passage grooves 23 , 23 (D
23 > D 18a ) is also applied to each modified example and each embodiment described later.

上述のように構成する本実施形態のラジアルころ軸受用保持器7cによれば、図19に示した分割型の保持器7bと同様に、保持器7cを、複数個(本実施形態の場合2個)の保持器素子9a、9aにより構成しているので、フレッチングの防止を図ることができる。即ち、外輪軌道4と内輪軌道5との間に存在して各ころ6、6を配置する環状空間13(図18参照)のうちの非負荷圏(ラジアル荷重が加わるのと反対側部分)に存在する保持器素子9aが、円周方向に若干変位可能になる。このため、使用時において、各ころ6、6の転動面と外輪軌道4及び内輪軌道5との接触部が少しずつ移動する。この結果、当該接触部にフレッチング摩耗が生じることを防止できる。   According to the radial roller bearing cage 7c of the present embodiment configured as described above, a plurality of cages 7c (in the case of the present embodiment, 2), like the split-type cage 7b shown in FIG. ) Of the cage elements 9a, 9a, so that fretting can be prevented. That is, in the non-load zone (the portion on the opposite side to where the radial load is applied) in the annular space 13 (see FIG. 18) that exists between the outer ring raceway 4 and the inner ring raceway 5 and in which the rollers 6 and 6 are arranged. The existing cage element 9a can be displaced slightly in the circumferential direction. For this reason, at the time of use, the contact part of the rolling surface of each roller 6 and 6 and the outer ring track 4 and the inner ring track 5 moves little by little. As a result, fretting wear can be prevented from occurring at the contact portion.

また、保持器7cに各リム部通油溝23、23を軸方向に沿って形成しているので、ラジアルころ軸受内を潤滑した潤滑油を、効率良くこのラジアルころ軸受の周辺に配置された部材に供給できる。即ち、本実施形態の場合、使用時に各保持器素子9a、9aが遠心力に基づいて、外輪軌道4に押し付けられた場合でも、ラジアルころ軸受を潤滑した潤滑油を、このラジアルころ軸受の内部から外部へ、各リム部通油溝23、23を通じて排出することができる。   Further, since the rim oil passage grooves 23, 23 are formed in the cage 7c along the axial direction, the lubricating oil lubricated in the radial roller bearing is efficiently arranged around the radial roller bearing. Can be supplied to members. That is, in the case of this embodiment, even when each cage element 9a, 9a is pressed against the outer ring raceway 4 based on the centrifugal force at the time of use, the lubricating oil that has lubricated the radial roller bearing is used as the inside of the radial roller bearing. It can discharge | emit through each rim | limb oil passage 23,23 to the exterior from.

特に、本実施形態の場合、断面形状を略逆M字形としたことにより、潤滑油が滞留し易い部分である外輪軌道4と各柱部11b、11bの内径寄り部分19a、19aの外周面との間の内部空間27、27に存在する潤滑油を、両リム部10b、10bの軸方向外方の外部空間28、28に効率良く排出できる。そして、これら各外部空間28、28に排出された潤滑油を、例えば、図18に示した、変速用歯車1の側面と動力伝達軸2の段部14との摺接部、この変速用歯車1の噛合部、或いは係合歯8の噛合部等の周辺部材の潤滑に使用することができる。   In particular, in the case of the present embodiment, the cross-sectional shape is a substantially inverted M shape, so that the outer ring raceway 4 which is a portion where the lubricating oil tends to stay and the outer peripheral surfaces of the inner diameter portions 19a and 19a of the pillar portions 11b and 11b The lubricating oil existing in the inner spaces 27, 27 between the two rim portions 10b, 10b can be efficiently discharged into the outer spaces 28, 28 outside in the axial direction. The lubricating oil discharged to each of the external spaces 28, 28 is, for example, a sliding contact portion between the side surface of the transmission gear 1 and the step portion 14 of the power transmission shaft 2 shown in FIG. 1 can be used to lubricate peripheral members such as a meshing portion or a meshing portion of the engaging teeth 8.

また、本実施形態では、断面形状を略逆M字形とした構造を採用して、脱落防止構造を備えた構造を低コストで造ることができる。即ち、この様な構造の保持器7cの場合、各ポケット12b、12bをピアス加工により形成すると同時に、円周方向に隣り合う各柱部11b、11bの互いに対向する側縁部のうち、各外径寄り部分18a、18aと各内径寄り部分19a、19aとにそれぞれ、円周方向に関する間隔が各ころ6の直径よりも小さくなる内径側、外径側両係合部21a、22aを形成できる。このため、大掛かりな設備が不要となり、短時間で効率良く加工できて、加工設備の運転経費等が嵩むこともない。   In the present embodiment, a structure having a substantially inverted M-shaped cross-section can be adopted, and a structure provided with a drop-off prevention structure can be manufactured at low cost. That is, in the case of the cage 7c having such a structure, the pockets 12b and 12b are formed by piercing, and at the same time, the outer peripheral edges of the column portions 11b and 11b adjacent to each other in the circumferential direction. Both the inner diameter side and outer diameter side engaging portions 21a and 22a can be formed on the diameter closer portions 18a and 18a and the inner diameter closer portions 19a and 19a, respectively, in which the interval in the circumferential direction is smaller than the diameter of each roller 6. This eliminates the need for large-scale equipment, enables efficient processing in a short time, and does not increase the operating cost of the processing equipment.

なお、上記実施形態では、リム部通油溝23、23の断面形状は、円弧状としているが、特に限定されるものではない。例えば、リム部通油溝23、23の断面形状は、図3の第1変形例に示すように、台形形状に形成することもできる。   In the above embodiment, the cross-sectional shape of the rim oil passage grooves 23, 23 is an arc shape, but is not particularly limited. For example, the cross-sectional shape of the rim portion oil passage grooves 23, 23 can be formed in a trapezoidal shape as shown in the first modified example of FIG.

また、上記実施形態では、両リム部10b、10bにリム部通油溝23、23を設けているため、剛性の低下が問題となる場合が懸念される。また、例えば、空転時の回転加減速が激しく、潤滑の乏しい使用環境のギアニードルでは、保持器剛性向上と、貫通油量性の両立が求められる。このような場合には、図4及び図5の第2変形例に示すように、両リム部10b、10bの円周方向に関して柱部11b、11bと整合する部分を軸方向内側に突出させることにより、両リム部10b、10bの剛性を上げることができる。柱部11b、11bの内径寄り部分19a、19aから、両リム部10b、10bへ立ち上がる形状は、図5に示すように柱部11b、11bに対して垂直方向とし、軸方向突出部29の外径D29をリム部10bの外径D10bと同径としても良いし、外周面に向かうにつれてリム部10b側に近づくテーパ面や階段状(即ち、段差状)、また、それらを組み合わせた形状であってもよい。 Moreover, in the said embodiment, since the rim | limb oil passage grooves 23 and 23 are provided in both rim | limb parts 10b and 10b, we may be anxious about the case where a fall of rigidity becomes a problem. In addition, for example, in a gear needle that is used in a use environment where the rotational acceleration / deceleration during idling is severe and the lubrication is poor, it is required to achieve both improved cage rigidity and penetration oil quantity. In such a case, as shown in the second modification of FIGS. 4 and 5, the portions that align with the pillar portions 11b and 11b in the circumferential direction of both rim portions 10b and 10b are protruded inward in the axial direction. Thereby, the rigidity of both the rim | limb parts 10b and 10b can be raised. As shown in FIG. 5, the shape of the pillar portions 11b, 11b rising from the inner-diameter portions 19a, 19a to both the rim portions 10b, 10b is perpendicular to the pillar portions 11b, 11b. shape to the diameter D 29 may be the outer diameter D 10b of the same diameter of the rim portion 10b, a tapered surface and stepped closer to the rim portion 10b side toward the outer peripheral surface (i.e., stepped), also a combination thereof It may be.

具体的に、図6及び図7の第3変形例では、両リム部10b、10bの円周方向に関して柱部11b、11bと整合する部分を軸方向内側に突出させた軸方向突出部29は、その外径D29をリム部10bの外径D10bよりも小径とした段差によって形成されている(D29<D10b)。このように段差状の軸方向突出部29を形成することで、第2変形例に比べて、潤滑油の排出を促しやすくなり、また、ころ6の端部の転送面の油が軸方向突出部29によって掻き取られることを抑制することができる。さらに、軸方向突出部29の外径D29は、リム部通油溝23の溝底径D23以下に形成されるので(D23≧D29)、柱部11bは油溝加工の影響を受けないため、柱部11bの成形精度を確保しやすい。また、柱部11bには、溝形状による特異な不連続部がなくなり、柱部11bの根元応力集中の緩和が期待できる。
なお、段差状の軸方向突出部29の外径D29は、面取りの有無にかかわらず、リム部10bとこの段差状の軸方向突出部29とのつなぎ目での外径とし、面取りがない場合には、軸方向突出部29の外周面での外径となる。
Specifically, in the third modification of FIGS. 6 and 7, the axial protruding portion 29 in which the portion aligned with the column portions 11 b and 11 b in the circumferential direction of both rim portions 10 b and 10 b is protruded inward in the axial direction is , its has an outside diameter D 29 is formed by a step which is also a smaller diameter than the outer diameter D 10b of the rim portion 10b (D 29 <D 10b) . By forming the stepped axial protrusion 29 in this manner, it becomes easier to expel the lubricating oil than in the second modification, and the oil on the transfer surface at the end of the roller 6 protrudes in the axial direction. Scraping by the portion 29 can be suppressed. Further, since the outer diameter D 29 of the axial protrusion 29 is formed to be equal to or smaller than the groove bottom diameter D 23 of the rim oil passage groove 23 (D 23 ≧ D 29 ), the column part 11b has an effect of oil groove machining. Since it does not receive, it is easy to ensure the molding accuracy of the column part 11b. Moreover, the column part 11b does not have a peculiar discontinuous part due to the groove shape, and relaxation of the root stress concentration of the column part 11b can be expected.
The outer diameter D 29 of the step-shaped axial protrusion 29 is the outer diameter at the joint between the rim portion 10b and the step-shaped axial protrusion 29 regardless of the presence or absence of chamfering, and there is no chamfering. Is the outer diameter of the outer peripheral surface of the axial protrusion 29.

また、図8及び図9の第4変形例では、両リム部10b、10bの円周方向に関して柱部11b、11bと整合する部分を軸方向内側に突出させた軸方向突出部29は、その外径D29をリム部10bの外径D10bよりも小径としたテーパ形状によって形成されている(D29<D10b)。このようなテーパ状の軸方向突出部29を形成することでも、第2変形例に比べて、潤滑油の排出を促しやすくなり、また、ころ6の端部の転送面の油が軸方向突出部29によって掻き取られることを抑制することができる。さらに、軸方向突出部29の外径D29は、リム部通油溝23の溝底径D23以下に形成されるので(D23≧D29)、柱部11bは油溝加工の影響を受けないため、柱部11bの成形精度を確保しやすい。また、柱部11bには、溝形状による特異な不連続部がなくなり、柱部11bの根元応力集中の緩和が期待できる。
なお、テーパ状の軸方向突出部29の外径D29も、面取りの有無にかかわらず、リム部10bとこのテーパ状の軸方向突出部29とのつなぎ目での外径とする。
Moreover, in the 4th modification of FIG.8 and FIG.9, the axial direction protrusion part 29 which made the part which aligns with the pillar parts 11b and 11b with respect to the circumferential direction of both rim | limb parts 10b and 10b protrude in the axial direction is the the outer diameter D 29 is formed by a tapered shape that the diameter smaller than the outer diameter D 10b of the rim portion 10b (D 29 <D 10b) . By forming such a tapered axial protrusion 29, it becomes easier to expel the lubricating oil than in the second modification, and the oil on the transfer surface at the end of the roller 6 protrudes in the axial direction. Scraping by the portion 29 can be suppressed. Further, since the outer diameter D 29 of the axial protrusion 29 is formed to be equal to or smaller than the groove bottom diameter D 23 of the rim oil passage groove 23 (D 23 ≧ D 29 ), the column part 11b has an effect of oil groove machining. Since it does not receive, it is easy to ensure the molding accuracy of the column part 11b. Moreover, the column part 11b does not have a peculiar discontinuous part due to the groove shape, and relaxation of the root stress concentration of the column part 11b can be expected.
The outer diameter D 29 of the tapered axial protruding portion 29 is also the outer diameter at the joint between the rim portion 10 b and the tapered axial protruding portion 29 regardless of the presence or absence of chamfering.

[第2実施形態]
図10及び図11は、本発明の第2実施形態に係るラジアルころ軸受用保持器を示している。本実施形態のラジアルころ軸受用保持器7cも、前述した第1実施形態と同様に、部分円筒状の2個の保持器素子9a、9aを、円周方向に並べることにより全体を円筒状に構成している。また、円周方向に関して各柱部11b、11bと整合する部分で、且つ、両リム部10b、10bの外周面に、複数個のリム部通油溝23、23を形成している。
[Second Embodiment]
10 and 11 show a radial roller bearing retainer according to a second embodiment of the present invention. As in the first embodiment, the radial roller bearing retainer 7c of the present embodiment is also made cylindrical as a whole by arranging two partially cylindrical retainer elements 9a, 9a in the circumferential direction. It is composed. In addition, a plurality of rim portion oil passage grooves 23 and 23 are formed on the outer peripheral surfaces of both the rim portions 10b and 10b at portions that are aligned with the column portions 11b and 11b in the circumferential direction.

また、本実施形態の場合、各柱部11b、11bの外径寄り部分18a、18aの外周面に、柱部通油溝24が切削加工或いは潰し加工によって形成されている。特に、本実施形態では、柱部通油溝24は、リム部通油溝23と円周方向において同位相、即ち、各柱部11b、11bの円周方向中間部において、外径寄り部分18a、18aの軸方向長さ全域に亘って形成されている。   Further, in the case of the present embodiment, the column portion oil passage grooves 24 are formed by cutting or crushing on the outer peripheral surfaces of the outer diameter portions 18a and 18a of the column portions 11b and 11b. In particular, in this embodiment, the column portion oil passage groove 24 is in phase with the rim portion oil passage groove 23 in the circumferential direction, that is, in the circumferential direction intermediate portion 18a of each pillar portion 11b, 11b. , 18a is formed over the entire length in the axial direction.

したがって、本実施形態の場合には、各柱部11b、11bの外径寄り部分18a、18aの外周面に、柱部通油溝24が形成されているので、ころ数またはころの動き量が制約を受ける一方、各柱部11b、11bの外周面と、外輪軌道4との間の内部空間27における通油性をより向上することができる。
その他の構成及び作用・効果に就いては、前述した第1実施形態の場合とほぼ同様である。
Therefore, in the case of the present embodiment, since the column portion oil passage grooves 24 are formed on the outer peripheral surfaces of the outer diameter portions 18a and 18a of the column portions 11b and 11b, the number of rollers or the amount of movement of the rollers can be reduced. While being restricted, the oil permeability in the internal space 27 between the outer peripheral surface of each of the column portions 11b and 11b and the outer ring raceway 4 can be further improved.
Other configurations and operations / effects are substantially the same as those of the first embodiment described above.

なお、上記実施形態では、各柱部11b、11bの外径寄り部分18a、18aに、柱部通油溝24が形成されているが、図12及び図13に示す第1変形例のように、各柱部11b、11bの外径寄り部分18a、18aには、半径方向に貫通し、且つ、ポケット12の形状と異なる通油用穴部25がピアス加工によって形成されてもよい。
この場合も、通油用穴部25は、リム部通油溝23と円周方向において同位相、即ち、各柱部11b、11bの円周方向中間部において、外径寄り部分18a、18aの軸方向長さ全域から軸方向両側の傾斜部20a,20aに亘って形成されている。
In the above embodiment, the column oil passage grooves 24 are formed in the outer diameter portions 18a and 18a of the column portions 11b and 11b. However, as in the first modification shown in FIGS. In addition, oil-permeable holes 25 that penetrate in the radial direction and are different from the shape of the pockets 12 may be formed by piercing in the outer diameter portions 18a and 18a of the pillars 11b and 11b.
Also in this case, the oil passage hole 25 has the same phase in the circumferential direction as the rim portion oil passage groove 23, that is, in the circumferential direction intermediate portion of each column portion 11b, 11b. It is formed from the entire axial length to the inclined portions 20a, 20a on both axial sides.

[第3実施形態]
図14及び図15は、本発明の第3実施形態に係るラジアルころ軸受用保持器を示している。本実施形態のラジアルころ軸受用保持器7cも、前述した第1実施形態と同様に、部分円筒状の2個の保持器素子9a、9aを、円周方向に並べることにより全体を円筒状に構成している。
[Third Embodiment]
14 and 15 show a radial roller bearing retainer according to a third embodiment of the present invention. As in the first embodiment, the radial roller bearing retainer 7c of the present embodiment is also made cylindrical as a whole by arranging two partially cylindrical retainer elements 9a, 9a in the circumferential direction. It is composed.

特に、本実施形態の場合、保持器7cは、金属製の薄板状の素材にピアス(プレスによる打ち抜き)加工を施すことにより、上述の様な脱落防止構造を備えた各ポケット12b、12bを形成し、さらに、プレス加工を施して断面形状が逆M字型の柱部11b、11bを形成する。また、両リム部10b、10bは、プレス加工によって軸方向両端部を径方向外側に折り曲げて起立部41を形成した後、さらに軸方向内側で径方向内側に折り返した折り返し部42とを有するが、各リム部通油溝23、23は、起立部41と折り返し部42となる軸方向位置で、ピアス加工によって予め溝用穴部30を形成しておくことで、プレス加工により構成される。   In particular, in the case of the present embodiment, the cage 7c forms the pockets 12b and 12b having the above-described drop-off preventing structure by performing piercing (punching by pressing) processing on a metal thin plate material. Further, press working is performed to form the pillar portions 11b and 11b having an inverted M-shaped cross section. Further, both rim portions 10b and 10b have a folded portion 42 that is folded back radially inward in the axial direction after forming both standing portions 41 by bending both axial end portions radially outward by pressing. Each rim portion oil passage groove 23, 23 is configured by pressing by forming a groove hole portion 30 in advance by piercing at an axial position where the standing portion 41 and the folded portion 42 are formed.

したがって、本実施形態のような、断面形状が略逆M字型の柱部11b、11bを有するプレス保持器7cの場合であっても、リム部通油溝23、23を形成することができ、前述した第1実施形態の場合とほぼ同様の作用・効果を発揮することができる。   Therefore, even in the case of the press retainer 7c having the substantially inverted M-shaped column portions 11b and 11b as in the present embodiment, the rim portion oil passage grooves 23 and 23 can be formed. The actions and effects similar to those of the first embodiment described above can be exhibited.

なお、プレス保持器7cにおいて、各リム部通油溝23、23の構成は、上述した実施形態のものに限定されず、例えば、図16及び図17の第1変形例に示すように、各リム部通油溝23、23は、ピアス加工によって予め形成された溝用切欠き31であってもよい。即ち、この変形例では、両リム部10b、10bは、プレス加工によって軸方向両端部を径方向外側に折り曲げて起立部43を形成した後、さらに軸方向内側に折り曲げた軸方向延出部44とを有するが、各リム部通油溝23、23は、起立部43及び軸方向延出部44となる軸方向位置で、ピアス加工によって予め溝用切欠き31を形成しておくことで、プレス加工によって構成される。   In the press cage 7c, the configuration of each rim portion oil passage groove 23, 23 is not limited to that of the above-described embodiment. For example, as shown in the first modification of FIGS. The rim portion oil passage grooves 23, 23 may be groove notches 31 formed in advance by piercing. That is, in this modified example, both rim portions 10b and 10b are formed by extending both axial end portions radially outward by press working to form standing portions 43, and then axially extending portions 44 bent further inward in the axial direction. However, each rim portion oil passage groove 23, 23 is formed in a groove notch 31 in advance by piercing at an axial position to be a standing portion 43 and an axially extending portion 44, Constructed by pressing.

なお、本発明は上述した実施形態に限定されるものでなく、適宜、変更、改良などが可能である。
前述した実施形態では、分割型の保持器を構成する保持器素子の個数を2個としているが、本発明は、保持器素子の個数は2個に限定されるものではない。保持器素子の個数を、例えば、3個以上の複数個とすることもできる。
また、リム部通油溝は、軸方向両端が開口して、柱部の径方向外方の空間と、リム部の軸方向外方の空間とを軸方向に連通できる構造であれば、軸方向に関して直線的な形状に限定されず、円周方向に折れ曲がっている様な構造でも良いし、その深さ寸法も軸方向に関して変化させても良い。
また、本発明のラジアルころ軸受用保持器は、外輪案内だけでなく、内輪案内或いは転動体(ころ)案内により保持器の姿勢を規制することもできる。
In addition, this invention is not limited to embodiment mentioned above, A change, improvement, etc. are possible suitably.
In the embodiment described above, the number of cage elements constituting the split type cage is two, but the number of cage elements in the present invention is not limited to two. For example, the number of cage elements may be three or more.
In addition, the rim portion oil-groove groove has an axial end as long as it has a structure in which both ends in the axial direction are open and the radially outer space of the column portion and the axially outer space of the rim portion can communicate in the axial direction. The structure is not limited to a linear shape with respect to the direction, and may be a structure that is bent in the circumferential direction, and the depth dimension may be changed with respect to the axial direction.
Further, the radial roller bearing retainer of the present invention can regulate the attitude of the retainer not only by the outer ring guide but also by the inner ring guide or the rolling element (roller) guide.

1 変速用歯車
2 動力伝達軸
3 ラジアルころ軸受
4 外輪軌道
5 内輪軌道
6 ころ
7、7a、7b、7c 保持器
8 係合歯
9、9a 保持器素子
10、10a、10b リム部
11、11a、11b 柱部
12、12b ポケット
13 環状空間
14 段部
15 シンクロハブ
16 供給路
17 分岐流路
18、18a 外径寄り部分
19、19a 内径寄り部分
20、20a 傾斜部
21a 内径側係合部
22a 外径側係合部
23 リム部通油溝
24 柱部通油溝
28 外部空間
DESCRIPTION OF SYMBOLS 1 Transmission gear 2 Power transmission shaft 3 Radial roller bearing 4 Outer ring raceway 5 Inner ring raceway 6 Rollers 7, 7a, 7b, 7c Cage 8 Engagement teeth 9, 9a Cage element 10, 10a, 10b Rim part 11, 11a, 11b Pillar part 12, 12b Pocket 13 Annular space 14 Step part 15 Synchro hub 16 Supply path 17 Branch flow path 18, 18a Outer diameter part 19, 19a Inner diameter part 20, 20a Inclined part 21a Inner diameter side engaging part 22a Outer diameter Side engagement portion 23 Rim portion oil passage groove 24 Column portion oil passage groove 28 External space

Claims (5)

軸方向に間隔を開けて設けられた円弧状の1対のリム部と、該両リム部間に円周方向に間隔を開けて配置された複数の柱部とを備え、それぞれが部分円筒形で、金属製の複数の保持器素子を有し、
該複数の保持器素子を組み合わせることで、全体を円筒状に構成し、円周方向に隣り合う前記柱部と前記両リム部とによりそれぞれ画成される複数のポケットに、各ころが転動自在に保持されるラジアルころ軸受用保持器であって、
前記各柱部は、前記各ころのピッチ円よりも径方向外方に配置される状態で軸方向中間部に設けられた大径部と、前記各ころのピッチ円よりも径方向内方に配置される状態で軸方向両端部に設けられた小径部と、前記大径部と前記各小径部とを軸方向に連続させた連続部とを備え、
前記リム部の径方向厚さは、前記柱部の半径方向厚さよりも大きく、
前記各柱部の小径部には、前記リム部と連続する部分に、その外径が前記リム部の外径寸法と同じであり、且つ、その半径方向肉厚が前記リム部の径方向肉厚と同じである突出部がそれぞれ設けられ、
前記突出部の軸方向内側側面は、前記柱部の小径部の外周面から垂直方向に立ち上がって形成され、
円周方向に関して前記各柱部と整合する部分で、且つ、前記各突出部及び前記両リム部の外周面には、リム部通油溝が軸方向に沿って形成されていることを特徴とするラジアルころ軸受用保持器。
A pair of arc-shaped rim portions provided at intervals in the axial direction, and a plurality of column portions arranged at intervals in the circumferential direction between the rim portions, each of which is a partial cylindrical shape And having a plurality of cage elements made of metal,
By combining the plurality of cage elements, the entire roller is configured in a cylindrical shape, and each roller rolls into a plurality of pockets respectively defined by the column portions and the rim portions adjacent in the circumferential direction. A radial roller bearing cage that is freely held,
Each of the column portions is arranged at a radially outer side than the pitch circle of each roller in a state of being arranged radially outward, and radially inward of the pitch circle of each roller. A small-diameter portion provided at both axial ends in a state of being disposed, and a continuous portion in which the large-diameter portion and each small-diameter portion are continuous in the axial direction,
The radial thickness of the rim portion is larger than the radial thickness of the column portion,
The small-diameter portion of each column portion has an outer diameter that is the same as the outer diameter dimension of the rim portion at a portion continuous with the rim portion, and a radial thickness of the rim portion. Protrusions that are the same as the thickness are each provided,
The axially inner side surface of the protruding portion is formed to rise in the vertical direction from the outer peripheral surface of the small diameter portion of the column portion,
A rim oil passage groove is formed along the axial direction on the outer peripheral surface of each of the protrusions and the rims at a portion aligned with the pillars in the circumferential direction. Radial roller bearing retainer.
前記各柱部の大径部の外径寸法は、前記両リム部の外径寸法よりも小さいことを特徴とする請求項1に記載のラジアルころ軸受用保持器。   2. The radial roller bearing retainer according to claim 1, wherein an outer diameter size of the large diameter portion of each of the column portions is smaller than an outer diameter size of the both rim portions. 前記各柱部の大径部の外周面には、軸方向に沿って延びる柱部通油溝が形成されていることを特徴とする請求項1又は2に記載のラジアルころ軸受用保持器。   The radial roller bearing retainer according to claim 1 or 2, wherein a column oil passage groove extending along the axial direction is formed on an outer peripheral surface of the large-diameter portion of each column portion. 前記各柱部には、半径方向に貫通し、且つ、前記ポケットの形状と異なる通油用穴部が形成されていることを特徴とする請求項1又は2に記載のラジアルころ軸受用保持器。 The radial roller bearing retainer according to claim 1 or 2 , wherein each of the pillar portions is formed with an oil passage hole that penetrates in a radial direction and is different from the shape of the pocket. . 内周面に円筒状の外輪軌道を設けた外輪相当部材と、
外周面に円筒状の内輪軌道を設けた内輪相当部材と、
前記外輪軌道と前記内輪軌道との間に転動自在に設けられた複数のころと、
前記各ころを保持する保持器とを備えたラジアルころ軸受であって、
前記保持器が、請求項1〜4のいずれか1項に記載のラジアルころ軸受用保持器であることを特徴とするラジアルころ軸受。
An outer ring equivalent member having a cylindrical outer ring raceway on the inner peripheral surface;
An inner ring equivalent member having a cylindrical inner ring raceway on the outer peripheral surface;
A plurality of rollers provided in a freely rollable manner between the outer ring raceway and the inner ring raceway;
A radial roller bearing comprising a cage for holding the rollers,
A radial roller bearing, wherein the cage is a radial roller bearing cage according to any one of claims 1 to 4.
JP2013226836A 2013-10-04 2013-10-31 Radial roller bearing cage and radial roller bearing Expired - Fee Related JP6349681B2 (en)

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