JP2009156391A - Cage for roller bearing and needle roller bearing - Google Patents

Cage for roller bearing and needle roller bearing Download PDF

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Publication number
JP2009156391A
JP2009156391A JP2007336938A JP2007336938A JP2009156391A JP 2009156391 A JP2009156391 A JP 2009156391A JP 2007336938 A JP2007336938 A JP 2007336938A JP 2007336938 A JP2007336938 A JP 2007336938A JP 2009156391 A JP2009156391 A JP 2009156391A
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Japan
Prior art keywords
column
pair
portions
roller bearing
cylindrical member
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JP2007336938A
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Japanese (ja)
Inventor
Shinji Oishi
真司 大石
Katsushi Abe
克史 阿部
Yugo Yoshimura
友悟 吉村
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2007336938A priority Critical patent/JP2009156391A/en
Publication of JP2009156391A publication Critical patent/JP2009156391A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/541—Details of individual pockets, e.g. shape or roller retaining means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/44—Needle bearings
    • F16C19/46—Needle bearings with one row or needles
    • F16C19/463—Needle bearings with one row or needles consisting of needle rollers held in a cage, i.e. subunit without race rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4676—Details of individual pockets, e.g. shape or roller retaining means of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers

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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 cage for a roller bearing increased in the rigidity of a bent portion and excellent in lubricating property. <P>SOLUTION: The cage 13 for the roller bearing includes a pair of rings 14, and a plurality of columns 15 for connecting the pair of rings 14 with each other including a column central section 16, a pair of column ends 17 and a pair of column inclined sections 18 positioned between the column central section 16 and the pair of column ends 17. A cylindrical member is radially deformed to form the column central section 16, the pair of column ends 17, and the pair of column inclined sections 18. The cylindrical member is compressed so that the thickness of a boundary of adjoining part is made greater than that of parts of the column central section 16, the pair of column ends 17, and the pair of the column inclined sections 18, and oil grooves 14a are formed as recesses at axial both ends of the cylindrical member. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、プレス加工によって製造されるころ軸受用保持器、およびころ軸受用保持器を備える針状ころ軸受に関するものである。   The present invention relates to a roller bearing retainer manufactured by press working and a needle roller bearing including the roller bearing retainer.

自動車用トランスミッションのアイドラー軸受、およびオートバイ用エンジンのコンロッド大端用軸受等には、ころと保持器とで構成されるケージ＆ローラタイプの針状ころ軸受が採用されることが多い。このような軸受が、例えば、特開２０００−２５７６３８号公報（特許文献１）に記載されている。   Cage and roller type needle roller bearings composed of rollers and cages are often used for idler bearings for automobile transmissions and large rod end bearings for motorcycle engines. Such a bearing is described in, for example, JP 2000-257638 A (Patent Document 1).

同公報には、管状素材をバルジ加工により断面Ｍ字型の環状部材に成形し、環状部材にころ保持用の窓を形成することにより、軽量で負荷容量の大きいころ軸受用保持器を得ることができると記載されている。
特開２０００−２５７６３８号公報 In this publication, a tubular material is formed into an annular member having an M-shaped cross section by bulging, and a roller retaining window is formed on the annular member, thereby obtaining a roller bearing retainer that is lightweight and has a large load capacity. It is stated that you can.
JP 2000-257638 A

上記公報に記載されている方法でころ軸受用保持器を形成した場合、屈曲部分、すなわち柱中央部と柱傾斜部との境界部分、柱傾斜部と柱端部との境界部分、および柱端部と環状側部との境界部分の肉厚が、管状素材の肉厚と比較して薄くなってしまう。軸受回転中に保持器に作用する応力は屈曲部分に集中するので、屈曲部分の薄肉化によってころ軸受用保持器の破損の危険性が増大する。また、上記した用途に採用される軸受は、長期間の使用に耐えるために、高い潤滑性能が要求される。   When the roller bearing retainer is formed by the method described in the above publication, the bent portion, that is, the boundary portion between the column central portion and the column inclined portion, the boundary portion between the column inclined portion and the column end portion, and the column end The thickness of the boundary portion between the portion and the annular side portion becomes thinner than the thickness of the tubular material. Since the stress acting on the cage during rotation of the bearing is concentrated on the bent portion, the risk of breakage of the roller bearing cage is increased by reducing the thickness of the bent portion. In addition, the bearing employed in the above-described application is required to have high lubrication performance in order to withstand long-term use.

そこで、この発明の目的は、屈曲部分の強度を高めると共に、潤滑性能の高いころ軸受用保持器、およびこのようなころ軸受用保持器を備えた針状ころ軸受を提供することである。   SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a roller bearing retainer having a high lubrication performance and a needle roller bearing equipped with such a roller bearing retainer while increasing the strength of the bent portion.

この発明に係るころ軸受用保持器は、円環形状の一対のリング部と、軸方向中央部領域で相対的に径方向内側に位置する柱中央部、軸方向端部領域で相対的に径方向外側に位置する一対の柱端部、および柱中央部と一対の柱端部それぞれとの間に位置する一対の柱傾斜部を含み、一対のリング部を相互に連結する複数の柱部とを備える。そして、円筒部材を径方向に変形させて、柱中央部、一対の柱端部、および一対の柱傾斜部を形成し、円筒部材を軸方向に圧縮して、柱中央部、一対の柱端部、および一対の柱傾斜部の各部の肉厚より隣接する各部の境界部分の肉厚を大きくすると共に、円筒部材の軸方向両端面に凹部を形成したことを特徴とする。   The roller bearing retainer according to the present invention includes a pair of ring-shaped ring portions, a column central portion located relatively radially inward in the axial central region, and a relative diameter in axial end regions. A plurality of column portions that include a pair of column end portions positioned on the outer side in the direction, and a pair of column inclined portions positioned between the column center portion and each of the pair of column end portions, and that couple the pair of ring portions to each other; Is provided. Then, the cylindrical member is deformed in the radial direction to form a column central portion, a pair of column end portions, and a pair of column inclined portions, the cylindrical member is compressed in the axial direction, and the column central portion, the pair of column ends. The thickness of the boundary part between adjacent parts is larger than the thickness of each part and the parts of the pair of column inclined parts, and recesses are formed on both axial end surfaces of the cylindrical member.

こうすることにより、境界部分の強度が相対的に向上する。その結果、応力集中による保持器の破損の危険性を低減することができる。また、凹部は、潤滑油を一時的に保持すると共に、潤滑油を軸受各部に供給する潤滑油供給手段として機能する。その結果、保持器の潤滑性能を高めることができる。なお、本明細書中「肉厚」とは、内径面と外径面との間の厚み寸法を指すものとする。   By doing so, the strength of the boundary portion is relatively improved. As a result, the risk of breakage of the cage due to stress concentration can be reduced. The recess functions as lubricating oil supply means for temporarily holding the lubricating oil and supplying the lubricating oil to each part of the bearing. As a result, the lubrication performance of the cage can be improved. In the present specification, “thickness” refers to the thickness dimension between the inner diameter surface and the outer diameter surface.

好ましくは、凹部は、柱部の延長線上にのみ設けられている。こうすることにより、ポケットの位置におけるリング部の軸方向の厚み寸法を減じることがないため、リング部の強度をなるべく落とさずに保持器の潤滑性能を高めることができる。   Preferably, the concave portion is provided only on the extension line of the column portion. By doing so, since the axial thickness dimension of the ring portion at the pocket position is not reduced, the lubrication performance of the cage can be enhanced without reducing the strength of the ring portion as much as possible.

一実施形態として、凹部は、リング部の径方向全域に延びる油溝である。こうすることにより、保持器の通油性を向上させることができる。   As one embodiment, the concave portion is an oil groove extending in the entire radial direction of the ring portion. By carrying out like this, the oil permeability of a holder | retainer can be improved.

他の実施形態として、凹部は、その径方向外側および径方向内側のうち少なくともいずれか一方と、円周方向両側とを側壁で囲まれた油溜まりである。こうすることにより、保持器の保油性を向上させることができる。   As another embodiment, the concave portion is an oil reservoir in which at least one of the radially outer side and the radially inner side and both sides in the circumferential direction are surrounded by side walls. By doing so, the oil retaining property of the cage can be improved.

さらに他の実施形態として、円筒部材は、直径が柱中央部と実質的に等しく、柱中央部、一対の柱端部、および一対の柱傾斜部は、円筒部材の軸方向両端部を拡径させて形成する。   As yet another embodiment, the cylindrical member has a diameter substantially equal to the central portion of the column, and the central portion of the column, the pair of column end portions, and the pair of column inclined portions expands both ends in the axial direction of the cylindrical member. Let it form.

さらに他の実施形態として、ころ軸受用保持器は、一対のリング部それぞれから径方向内側に延びる鍔部をさらに備え、一対のリング部、および鍔部の肉厚は、リング部と鍔部との境界部分の肉厚より小さく、かつ境界部分の曲率半径より大きい。   As still another embodiment, the roller bearing retainer further includes a flange portion extending radially inward from each of the pair of ring portions, and the pair of ring portions and the thickness of the flange portion include the ring portion and the flange portion. It is smaller than the wall thickness of the boundary part and larger than the curvature radius of the boundary part.

この発明に係る針状ころ軸受は、複数の針状ころと、隣接する柱部の間に針状ころを収容するポケットが形成されている上記のいずれかに記載のころ軸受用保持器とを備える。上記構成のころ軸受用保持器を採用することにより、信頼性の高い針状ころ軸受を得ることができる。   A needle roller bearing according to the present invention includes a plurality of needle rollers and the roller bearing retainer according to any one of the above, wherein a pocket for accommodating the needle rollers is formed between adjacent column portions. Prepare. A highly reliable needle roller bearing can be obtained by employing the roller bearing cage having the above-described configuration.

この発明によれば、境界部分の肉厚を他の部分より厚くすることにより、高強度のころ軸受用保持器を得ることができる。また、凹部は、潤滑油を一時的に保持すると共に、潤滑油を軸受各部に供給する潤滑油供給手段として機能する。その結果、保持器の潤滑性能を高めることができる。また、このようなころ軸受用保持器を採用することにより、信頼性の高い針状ころ軸受を得ることができる。   According to the present invention, it is possible to obtain a high-strength roller bearing retainer by making the boundary portion thicker than other portions. The recess functions as lubricating oil supply means for temporarily holding the lubricating oil and supplying the lubricating oil to each part of the bearing. As a result, the lubrication performance of the cage can be improved. Further, by adopting such a roller bearing retainer, a highly reliable needle roller bearing can be obtained.

図１〜図４を参照して、この発明の一実施形態に係る針状ころ軸受１１、およびころ軸受用保持器１３（以下、単に「保持器１３」という）を説明する。なお、図１は保持器１３の斜視図、図２は針状ころ軸受１１の斜視図、図３は保持器１３の柱部１５の形状を示す斜視図、図４は図３の矢印ＩＶの方向から見た矢視図である。   A needle roller bearing 11 and a roller bearing cage 13 (hereinafter simply referred to as “cage 13”) according to an embodiment of the present invention will be described with reference to FIGS. 1 is a perspective view of the cage 13, FIG. 2 is a perspective view of the needle roller bearing 11, FIG. 3 is a perspective view showing the shape of the column portion 15 of the cage 13, and FIG. 4 is an arrow IV in FIG. It is an arrow view seen from the direction.

まず、図２を参照して、針状ころ軸受１１は、複数の針状ころ１２と、複数の針状ころ１２を保持する保持器１３とを備える。次に、図１を参照して、保持器１３は、円環形状の一対のリング部１４と、一対のリング部１４を相互に接続する複数の柱部１５とを備える。また、隣接する柱部１５の間には、針状ころ１２を収容するポケット２０が形成されている。   First, referring to FIG. 2, the needle roller bearing 11 includes a plurality of needle rollers 12 and a cage 13 that holds the plurality of needle rollers 12. Next, referring to FIG. 1, the retainer 13 includes a pair of ring-shaped ring portions 14 and a plurality of column portions 15 that connect the pair of ring portions 14 to each other. A pocket 20 for accommodating the needle rollers 12 is formed between the adjacent column portions 15.

なお、本明細書中「円環形状のリング部」とは、円周方向に連続する一体型のリング部のみを指すものとする。すなわち、両端部を溶接等によって接合したリング部は含まないものとして理解すべきである。   In the present specification, the “annular ring portion” refers only to an integral ring portion that is continuous in the circumferential direction. That is, it should be understood that a ring portion in which both ends are joined by welding or the like is not included.

一対のリング部１４の軸方向外側を向く端面には、それぞれ凹部が設けられている。この凹部は、保持器１３の軽量化に寄与すると共に、保持器１３の潤滑性能を高める。   Concave portions are respectively provided on the end faces of the pair of ring portions 14 facing outward in the axial direction. The concave portion contributes to weight reduction of the cage 13 and enhances the lubrication performance of the cage 13.

図１〜図３を参照して、この実施形態に係る凹部は、リング部１４の径方向全域に延びる油溝１４ａである。潤滑油は、この油溝１４ａを通って針状ころ軸受１１の径方向外側および内側に移動する。その結果、針状ころ軸受１１の通油性が向上する。通油性の向上は、摩耗粉の除去や針状ころ軸受１１の温度上昇の抑制に寄与する。特に、軸受周辺に十分な量の潤滑油が存在する環境で使用される場合に有利である。   With reference to FIGS. 1-3, the recessed part which concerns on this embodiment is the oil groove 14a extended in the radial direction whole region of the ring part 14. As shown in FIG. The lubricating oil moves through the oil groove 14a to the outside and the inside of the needle roller bearing 11 in the radial direction. As a result, the oil permeability of the needle roller bearing 11 is improved. The improvement in oil permeability contributes to the removal of wear powder and the suppression of the temperature rise of the needle roller bearing 11. It is particularly advantageous when used in an environment where a sufficient amount of lubricating oil exists around the bearing.

また、油溝１４ａは、柱部１５の延長線上にのみ設けられている。すなわち、ポケット２０の位置におけるリング部１４の軸方向の厚み寸法を減じることがないため、リング部１４の強度をなるべく落とさずに、上記の効果を得ることができる。   The oil groove 14 a is provided only on the extension line of the column portion 15. That is, since the thickness dimension in the axial direction of the ring portion 14 at the pocket 20 is not reduced, the above-described effects can be obtained without reducing the strength of the ring portion 14 as much as possible.

柱部１５は、その軸方向中央部領域で相対的に径方向内側に位置する柱中央部１６と、軸方向端部領域で相対的に径方向外側に位置する一対の柱端部１７と、柱中央部１６および一対の柱端部１７それぞれの間に位置する一対の柱傾斜部１８とを含む。   The column portion 15 includes a column central portion 16 positioned relatively radially inward in the axial central region, a pair of column end portions 17 positioned relatively radially outward in the axial end region, and A column central portion 16 and a pair of column inclined portions 18 positioned between each of the column end portions 17 are included.

次に、図３および図４を参照して、ポケット２０に対面する柱部１５の壁面には、針状ころ１２の脱落を防止する第１および第２のころ止め部１６ａ，１７ａと、針状ころ１２の回転を案内する案内面１６ｂ，１７ｂ，１８ｂと、非接触部１６ｃ，１７ｃと、油溝１６ｄ，１７ｄとが設けられている。   Next, referring to FIG. 3 and FIG. 4, first and second roller stoppers 16 a and 17 a that prevent the needle rollers 12 from dropping off on the wall surface of the column portion 15 facing the pocket 20, and the needle Guide surfaces 16b, 17b, 18b for guiding the rotation of the tapered roller 12, non-contact portions 16c, 17c, and oil grooves 16d, 17d are provided.

第１のころ止め部１６ａは、柱中央部１６の２箇所に設けられている。より具体的には、ポケット２０に対面する柱中央部１６の壁面の径方向内側に偏在している。そして、針状ころ１２の径方向内側への脱落を防止する。   The first roller stoppers 16 a are provided at two locations on the column central portion 16. More specifically, it is unevenly distributed radially inward of the wall surface of the column central portion 16 facing the pocket 20. Then, the needle rollers 12 are prevented from falling off inward in the radial direction.

第２のころ止め部１７ａは、一対の柱端部１７それぞれに設けられている。より具体的には、ポケット２０に対面する柱端部１７の壁面の径方向外側に偏在している。そして、針状ころ１２の径方向外側への脱落を防止する。   The second roller stopper 17a is provided at each of the pair of column end portions 17. More specifically, it is unevenly distributed on the radially outer side of the wall surface of the column end portion 17 facing the pocket 20. Then, the needle rollers 12 are prevented from falling off radially outward.

案内面１６ｂは、柱中央部１６の第１のころ止め部１６ａと軸方向に隣接する領域に設けられている。案内面１７ｂは、柱端部１７の第２のころ止め部１７ａと軸方向に隣接する領域に設けられている。案内面１８ｂは、柱傾斜部１８の全域に設けられている。また、案内面１６ｂ，１７ｂ，１８ｂは、同一の平面を構成している。   The guide surface 16b is provided in the area | region adjacent to the 1st roller stop part 16a of the pillar center part 16 at an axial direction. The guide surface 17b is provided in a region adjacent to the second roller stopper 17a of the column end portion 17 in the axial direction. The guide surface 18 b is provided in the entire area of the column inclined portion 18. Further, the guide surfaces 16b, 17b, 18b constitute the same plane.

また、第１のころ止め部１６ａの径方向外側の領域、および第２のころ止め部１７ａの径方向内側の領域には、それぞれ案内面１６ｂ，１７ｂより後退して、針状ころ１２と接触しない非接触部１６ｃ，１７ｃが設けられている。この領域は、潤滑油を保持する油溜まりとして機能する。さらに、第１のころ止め部１６ａおよび第２のころ止め部１７ａの軸方向両側には、径方向に延びる油溝１６ｄ，１７ｄが設けられている。これにより、保持器１３の径方向の通油性が向上する。   Further, in the radially outer region of the first roller stopper 16a and the radially inner region of the second roller stopper 17a, the needle roller 12 contacts with the guide surfaces 16b and 17b, respectively. Non-contact portions 16c and 17c that are not to be provided are provided. This region functions as an oil reservoir that holds lubricating oil. Further, oil grooves 16d and 17d extending in the radial direction are provided on both axial sides of the first roller stopper 16a and the second roller stopper 17a. Thereby, the oil permeability in the radial direction of the cage 13 is improved.

上記構成の柱部１５において、柱中央部１６、柱端部１７、および柱傾斜部１８（以下、これらを総称して「直線部分」という）の肉厚ｔ１は実質的に等しく設定されている。一方、柱中央部１６と柱傾斜部１８との境界部分、および柱端部１７と柱傾斜部１８との境界部分（以下、これらを総称して「境界部分」という）の肉厚ｔ２は直線部分の肉厚ｔ１より厚くなっている（ｔ１＜ｔ２）。これにより、境界部分の強度が相対的に向上する。その結果、軸受回転時の応力が境界部分に集中しても保持器１３の破損を有効に防止することができる。 In the column portion 15 having the above-described configuration, the wall thickness t 1 of the column central portion 16, the column end portion 17, and the column inclined portion 18 (hereinafter collectively referred to as “linear portion”) is set to be substantially equal. Yes. On the other hand, the thickness t 2 of the boundary portion between the column central portion 16 and the column inclined portion 18 and the boundary portion between the column end portion 17 and the column inclined portion 18 (hereinafter collectively referred to as “boundary portion”) is It is thicker than the wall thickness t 1 of the straight line portion (t 1 <t 2 ). Thereby, the intensity | strength of a boundary part improves relatively. As a result, it is possible to effectively prevent the cage 13 from being damaged even if stress during rotation of the bearing is concentrated on the boundary portion.

また、直線部分の肉厚ｔ１と境界部分の曲率半径ｒとは、ｒ＜ｔ１の関係を満たす。境界部分の曲率半径ｒを小さくすれば、境界部分に隣接する直線部分の軸方向長さを長く、すなわち、直線部分の表面積を大きくすることができる。その結果、軸受回転時の接触面圧を低減することができる。 Further, the thickness t 1 of the straight line portion and the curvature radius r of the boundary portion satisfy the relationship r <t 1 . If the curvature radius r of the boundary portion is reduced, the axial length of the linear portion adjacent to the boundary portion can be increased, that is, the surface area of the linear portion can be increased. As a result, the contact surface pressure during rotation of the bearing can be reduced.

具体的には、保持器１３を外径側案内（ハウジング案内）とする場合、柱端部１７の外径面とハウジング（図示省略）とが接触する。そこで、少なくとも柱端部１７と柱傾斜部１８との間の境界部分の曲率半径ｒを上記の範囲内とすれば、柱端部１７の外径面とハウジングとの間の接触面圧を低減することができる。   Specifically, when the cage 13 is an outer diameter side guide (housing guide), the outer diameter surface of the column end portion 17 comes into contact with the housing (not shown). Therefore, if the curvature radius r of the boundary portion between at least the column end portion 17 and the column inclined portion 18 is within the above range, the contact surface pressure between the outer diameter surface of the column end portion 17 and the housing is reduced. can do.

また、リング部１４および柱端部１７の外径面の表面粗さＲａは、０．０５μｍ以上０．３μｍ以下に設定する。これにより、リング部１４および柱端部１７の外径面とハウジングとの接触による摩耗を防止することができる。なお、「表面粗さＲａ」とは、算術平均粗さのことである。   Further, the surface roughness Ra of the outer diameter surfaces of the ring portion 14 and the column end portion 17 is set to 0.05 μm or more and 0.3 μm or less. Thereby, the abrasion by the contact of the outer diameter surface of the ring part 14 and the column end part 17 and the housing can be prevented. “Surface roughness Ra” refers to arithmetic average roughness.

一方、保持器１３を内径側案内（回転軸案内）とする場合、柱中央部１６の内径面と回転軸（図示省略）とが接触する。そこで、少なくとも柱中央部１６と柱傾斜部１８との間の境界部分の曲率半径ｒを上記の範囲内とすれば、柱中央部１６の内径面と回転軸との間の接触面圧を低減することができる。また、この場合には、柱中央部１６の内径面の表面粗さＲａを、０．０５μｍ以上０．３μｍ以下に設定すればよい。   On the other hand, when the cage 13 is an inner diameter side guide (rotary shaft guide), the inner diameter surface of the column central portion 16 and the rotation shaft (not shown) are in contact with each other. Therefore, if the curvature radius r of the boundary portion between at least the column central portion 16 and the column inclined portion 18 is within the above range, the contact surface pressure between the inner diameter surface of the column central portion 16 and the rotating shaft is reduced. can do. In this case, the surface roughness Ra of the inner diameter surface of the column central portion 16 may be set to 0.05 μm or more and 0.3 μm or less.

なお、境界部分は、凸側（曲げ加工時に引っ張り応力が作用する側）と、凹側（曲げ加工時に圧縮応力が作用する側）とにそれぞれＲ部分が形成される。このとき、凸側の曲率半径は、常に凹側の曲率半径より大きい。そこで、本明細書中「境界部分の曲率半径ｒ」とは、凸側の曲率半径を指すものとする。また、「境界部分の肉厚ｔ２」とは、凸側の中央部と凹側の中央部とを結ぶ線分の長さを指すものとする。 In addition, as for a boundary part, R part is formed in the convex side (side where tensile stress acts at the time of bending) and the concave side (side where compressive stress acts at the time of bending), respectively. At this time, the curvature radius on the convex side is always larger than the curvature radius on the concave side. Therefore, “the radius of curvature r of the boundary portion” in this specification refers to the radius of curvature on the convex side. Further, the “thickness t 2 of the boundary portion” refers to the length of a line segment connecting the central portion on the convex side and the central portion on the concave side.

また、柱中央部１６の外径面は、柱端部１７の内径面よりも径方向外側に位置している。そして、針状ころ１２のピッチ円１２ａは、柱中央部１６の外径面より径方向内側であって、かつ柱端部１７の内径面より径方向外側に位置している。これにより、針状ころ１２は、案内面１６ｂ，１７ｂ，１８ｂそれぞれに接触する。このように、針状ころ１２と案内面１６ｂ，１７ｂ，１８ｂとの接触面積を増加させることにより、針状ころ１２のスキューを有効に防止することができる。   Further, the outer diameter surface of the column central portion 16 is located on the radially outer side than the inner diameter surface of the column end portion 17. The pitch circle 12 a of the needle roller 12 is located on the radially inner side from the outer diameter surface of the column central portion 16 and on the radially outer side from the inner diameter surface of the column end portion 17. Thereby, the needle roller 12 contacts each of the guide surfaces 16b, 17b, and 18b. Thus, the skew of the needle roller 12 can be effectively prevented by increasing the contact area between the needle roller 12 and the guide surfaces 16b, 17b, 18b.

ただし、柱中央部１６と柱端部１７との位置関係は上記の場合に限られない。図５を参照して、保持器１３の変形例を説明する。なお、図５は保持器１３の変形例を示す図であって、図４に対応する図である。なお、各構成要素の形状や機能は共通するので、同一の構成要素には図４と同一の参照番号を付し、説明は省略する。   However, the positional relationship between the column center portion 16 and the column end portion 17 is not limited to the above case. A modified example of the cage 13 will be described with reference to FIG. FIG. 5 is a view showing a modification of the cage 13 and corresponds to FIG. In addition, since the shape and function of each component are common, the same reference number is attached to the same component as FIG. 4, and description is abbreviate | omitted.

図５を参照して、柱中央部１６の外径面は、柱端部１７の内径面よりも径方向内側に位置している。そして、針状ころ１２のピッチ円１２ａは、柱中央部１６の外径面より径方向外側であって、かつ柱端部１７の内径面より径方向内側に位置している。この場合、針状ころ１２は、柱傾斜部１８の案内面１８ｂでのみ案内されることになる。上記構成とすれば、第１のころ止め部１６ａと第２のころ止め部１７ａとが径方向に離れて配置されるので、針状ころ１２の脱落を適切に防止することができる。   Referring to FIG. 5, the outer diameter surface of the column center portion 16 is located on the radially inner side with respect to the inner diameter surface of the column end portion 17. The pitch circle 12 a of the needle roller 12 is located on the radially outer side from the outer diameter surface of the column center portion 16 and on the radially inner side from the inner diameter surface of the column end portion 17. In this case, the needle roller 12 is guided only on the guide surface 18 b of the column inclined portion 18. If it is set as the above-mentioned composition, since the 1st roller stop part 16a and the 2nd roller stop part 17a are arranged away in the diameter direction, drop-off of needle roller 12 can be prevented appropriately.

次に、図６〜図１５を参照して、保持器１３の製造方法を説明する。なお、図６は保持器１３の主な製造工程を示すフロー図、図７〜図１０は第１の工程の詳細を示す図、図１１〜図１４は第２の工程の詳細を示す図、図１５は第３の工程の詳細を示す図である。   Next, with reference to FIGS. 6-15, the manufacturing method of the holder | retainer 13 is demonstrated. 6 is a flowchart showing the main manufacturing process of the cage 13, FIGS. 7 to 10 are diagrams showing details of the first process, FIGS. 11 to 14 are diagrams showing details of the second process, FIG. 15 is a diagram showing details of the third step.

まず、保持器１３の出発材料としては、炭素含有量が０．１５ｗｔ％以上１．１ｗｔ％以下の鋼板（炭素鋼）を使用する。具体的には、炭素含有量が０．１５ｗｔ％以上０．５ｗｔ％以下のＳＣＭ４１５やＳ５０Ｃ等、または、炭素含有量が０．５ｗｔ％以上１．１ｗｔ％以下のＳＡＥ１０７０やＳＫ５等が挙げられる。   First, as a starting material for the cage 13, a steel plate (carbon steel) having a carbon content of 0.15 wt% or more and 1.1 wt% or less is used. Specifically, SCM415 or S50C having a carbon content of 0.15 wt% or more and 0.5 wt% or less, or SAE1070 or SK5 having a carbon content of 0.5 wt% or more and 1.1 wt% or less.

なお、炭素含有量が０．１５ｗｔ％未満の炭素鋼は、焼入処理によって浸炭硬化層が形成されにくく、保持器１３に必要な硬度を得るためには、浸炭窒化処理を行う必要がある。浸炭窒化処理は、後述する各焼入処理と比較して設備費用が高額になるので、結果として、針状ころ軸受１１の製造コストが上昇する。また、炭素含有量が０．１５ｗｔ％未満の炭素鋼では浸炭窒化処理によっても十分な浸炭硬化層が得られない場合があり、表面起点型の剥離が早期に発生する恐れがある。一方、炭素含有量が１．１ｗｔ％を超える炭素鋼は加工性が著しく低下する。   Carbon steel having a carbon content of less than 0.15 wt% is unlikely to have a carburized hardened layer formed by quenching, and needs to be carbonitrided to obtain the required hardness for the cage 13. The carbonitriding process increases the equipment cost compared to each quenching process described later, and as a result, the manufacturing cost of the needle roller bearing 11 increases. In addition, in carbon steel having a carbon content of less than 0.15 wt%, a sufficient carburized hardened layer may not be obtained even by carbonitriding, and surface-origin type peeling may occur early. On the other hand, the workability of carbon steel having a carbon content exceeding 1.1 wt% is significantly reduced.

図６に示す第１の工程では、上記した出発材料としての鋼板から円筒部材２２を得る（Ｓ１１）。具体的には、図７を参照して、深絞り加工によって鋼板からカップ状部材２１を得る。このとき、カップ状部材２１の軸方向一方側端部（図７の上側）には底壁２１ａが、軸方向他方側端部（図７の下側）には外向きフランジ部２１ｂが形成される。また、このとき、しごき加工によって、カップ状部材２１の外径面または内径面の表面粗さＲａを、０．０５μｍ以上０．３μｍ以下にする。   In the first step shown in FIG. 6, the cylindrical member 22 is obtained from the steel plate as the starting material (S11). Specifically, referring to FIG. 7, a cup-shaped member 21 is obtained from a steel plate by deep drawing. At this time, a bottom wall 21a is formed at one axial end portion (upper side in FIG. 7) of the cup-shaped member 21, and an outward flange portion 21b is formed at the other axial end portion (lower side in FIG. 7). The At this time, the surface roughness Ra of the outer diameter surface or inner diameter surface of the cup-shaped member 21 is set to 0.05 μm or more and 0.3 μm or less by ironing.

次に、図８を参照して、打ち抜き加工によってカップ状部材２１の底壁２１ａを除去する。ただし、打ち抜き加工によっては底壁２１ａを完全に除去することはできず、カップ状部材２１の軸方向一方側端部には内向きフランジ部２１ｃが形成される。   Next, referring to FIG. 8, the bottom wall 21a of the cup-shaped member 21 is removed by punching. However, the bottom wall 21a cannot be completely removed by punching, and an inward flange portion 21c is formed at one end of the cup-shaped member 21 in the axial direction.

次に、図９を参照して、バーリング加工によって内向きフランジ部２１ｃを軸方向に立ち上げる。さらに図１０を参照して、トリミング加工によってカップ状部材２１の軸方向他方側端部を切断することによって外向きフランジ部２１ｂを除去する。   Next, referring to FIG. 9, the inward flange portion 21c is raised in the axial direction by burring. Further, referring to FIG. 10, the outward flange portion 21b is removed by cutting the other axial end portion of the cup-shaped member 21 by trimming.

これにより、円筒部材２２を得ることができる。上記の工程で得られた円筒部材２２の外径寸法は、柱中央部１６の外径寸法に一致する。また、上記の工程で得られた円筒部材２２の肉厚をｔとする。   Thereby, the cylindrical member 22 can be obtained. The outer diameter size of the cylindrical member 22 obtained in the above process matches the outer diameter size of the column central portion 16. In addition, the thickness of the cylindrical member 22 obtained in the above process is t.

次に、図６に示す第２の工程では、円筒部材２２を径方向に変形させて柱中央部１６、一対の柱端部１７、および一対の柱傾斜部１８を形成する（Ｓ１２）。この実施形態においては、円筒部材２２の外径面を拘束する拡開プレス用外型２３（以下、単に「外型２３」という）と、円筒部材２２の内径面を拘束する一対の拡開プレス用内型２５，２６（以下、単に「内型２５，２６」という）とを使用して円筒部材２２の軸方向両端部を拡径させる（拡開プレス）。   Next, in the second step shown in FIG. 6, the cylindrical member 22 is deformed in the radial direction to form the column central portion 16, the pair of column end portions 17, and the pair of column inclined portions 18 (S12). In this embodiment, an outer mold 23 for expanding press that restrains the outer diameter surface of the cylindrical member 22 (hereinafter simply referred to as “outer mold 23”) and a pair of expanding presses that restrain the inner diameter surface of the cylindrical member 22. Using the inner dies 25 and 26 (hereinafter, simply referred to as “inner dies 25 and 26”), both end portions in the axial direction of the cylindrical member 22 are expanded (expansion press).

図１１〜図１４を参照して、外型２３は、内部に円筒部材２２を受け入れる円筒空間２３ａを有する。この円筒空間２３ａは、柱中央部１６の外径寸法に一致する小径部２３ｂと、柱端部１７の外径寸法に一致する大径部２３ｃと、小径部２３ｂおよび大径部２３ｃの間に柱傾斜部１８の傾斜角度に一致する傾斜部２３ｄとで構成されている。   Referring to FIGS. 11 to 14, outer mold 23 has a cylindrical space 23 a that receives cylindrical member 22 therein. The cylindrical space 23a includes a small diameter portion 23b that matches the outer diameter size of the column center portion 16, a large diameter portion 23c that matches the outer diameter size of the column end portion 17, and the small diameter portion 23b and the large diameter portion 23c. It is comprised by the inclination part 23d which corresponds to the inclination angle of the column inclination part 18. As shown in FIG.

第１の内型２５は、円筒部材２２の軸方向一方側端部（図１１の上側）から挿入される円柱形状の部材である。第１の内型２５は、柱中央部１６の内径寸法に一致する小径部２５ａと、柱端部１７の内径寸法に一致する大径部２５ｂと、小径部２５ａおよび大径部２５ｂの間に柱傾斜部１８の傾斜角度に一致する傾斜部２５ｃとで構成される。第２の内型２６も同一の構成であって、円筒部材２２の軸方向他方方端部（図１１の下側）から挿入される。   The first inner mold 25 is a columnar member that is inserted from one axial end (upper side in FIG. 11) of the cylindrical member 22. The first inner mold 25 includes a small diameter portion 25a that matches the inner diameter size of the column center portion 16, a large diameter portion 25b that matches the inner diameter size of the column end portion 17, and the small diameter portion 25a and the large diameter portion 25b. It is comprised with the inclination part 25c which corresponds to the inclination angle of the column inclination part 18. FIG. The second inner mold 26 has the same configuration, and is inserted from the other axial end portion (lower side in FIG. 11) of the cylindrical member 22.

外型２３は、例えば、９０°の間隔で放射状に分割された第１〜第４の分割外型２４ａ，２４ｂ，２４ｃ，２４ｄによって構成されている。この第１〜第４の分割外型２４ａ〜２４ｄは、それぞれ移動治具２７によって円筒部材２２の径方向に移動可能である。また、第１および第２の内型２５，２６は、それぞれ円筒部材２２の軸方向に移動可能である。   The outer mold 23 includes, for example, first to fourth divided outer molds 24a, 24b, 24c, and 24d that are radially divided at intervals of 90 °. The first to fourth divided outer dies 24 a to 24 d can be moved in the radial direction of the cylindrical member 22 by a moving jig 27. The first and second inner dies 25 and 26 are movable in the axial direction of the cylindrical member 22, respectively.

図１１を参照して、第１〜第４の分割外型２４ａ〜２４ｄが径方向に後退し、第１および第２の内型２５，２６が軸方向に後退すると、円筒部材２２を円筒空間２３ａから出し入れ可能な状態となる。ここで「後退」とは、円筒部材２２から遠ざかる方向に移動することを指すものとする。   Referring to FIG. 11, when the first to fourth divided outer dies 24a to 24d are retracted in the radial direction and the first and second inner dies 25 and 26 are retracted in the axial direction, the cylindrical member 22 is moved into the cylindrical space. It will be in the state which can be taken in / out from 23a. Here, “retreat” refers to movement in a direction away from the cylindrical member 22.

次に、図１３を参照して、第１〜第４の分割外型２４ａ〜２４ｄが径方向に前進すると、小径部２３ｂで円筒部材２２の外径面を拘束する。さらに、図１４を参照して、第１および第２の内型２５，２６が軸方向に前進すると、大径部２５ｂ，２６ｂおよび傾斜部２５ｃ，２６ｃによって円筒部材２２の軸方向両端部が径方向外側に押し広げられる。ここで「前進」とは、円筒部材２２に近づく方向に移動することを指すものとする。   Next, referring to FIG. 13, when the first to fourth divided outer dies 24a to 24d advance in the radial direction, the outer diameter surface of the cylindrical member 22 is restrained by the small diameter portion 23b. Further, referring to FIG. 14, when the first and second inner dies 25, 26 are advanced in the axial direction, both end portions in the axial direction of the cylindrical member 22 have diameters due to the large diameter portions 25b, 26b and the inclined portions 25c, 26c. It is pushed outward in the direction. Here, “advance” refers to movement in a direction approaching the cylindrical member 22.

これにより、柱中央部１６、一対の柱端部１７、および一対の柱傾斜部１８がそれぞれ形成される。なお、拡開プレスによって円筒部材２２が引き伸ばされるので、第２の工程終了後の柱中央部１６、一対の柱端部１７、および一対の柱傾斜部１８の肉厚ｔ１は、円筒部材２２の肉厚ｔより薄くなっている（ｔ１＜ｔ）。 Thereby, the pillar center part 16, a pair of pillar edge part 17, and a pair of pillar inclination part 18 are each formed. Since the cylindrical member 22 is stretched by the expansion press, the wall thickness t 1 of the column central portion 16, the pair of column end portions 17, and the pair of column inclined portions 18 after the completion of the second step is the cylindrical member 22. Is less than the wall thickness t (t 1 <t).

次に、図６に示す第３の工程では、増肉加工によって境界部分を増肉すると共に、円筒部材２２の軸方向両端面に油溝１４ａを形成する（Ｓ１３）。   Next, in the third step shown in FIG. 6, the boundary portion is thickened by the thickening process, and the oil grooves 14a are formed on both axial end surfaces of the cylindrical member 22 (S13).

図１５を参照して、増肉加工には、円筒形状の一対の圧縮治具２８，２９を用いる。圧縮治具２８，２９は、円筒部材２２と接触する先端面に凹凸を有する。そして、外型２３および内型２５，２６によって円筒部材２２を拘束した状態（拡開プレスを行った状態）で、一対の圧縮治具２８，２９によって円筒部材２２の軸方向両端面を両側から圧縮する。   Referring to FIG. 15, a pair of cylindrical compression jigs 28 and 29 are used for the thickening process. The compression jigs 28 and 29 have irregularities on the tip surfaces that come into contact with the cylindrical member 22. Then, in a state where the cylindrical member 22 is constrained by the outer mold 23 and the inner molds 25 and 26 (a state where the expansion press is performed), both end surfaces in the axial direction of the cylindrical member 22 are viewed from both sides by the pair of compression jigs 28 and 29. Compress.

このとき、直線部分の内外径面は、外型２３および内型２５，２６によって拘束されているので、肉厚は変化しない。一方、境界部分と外型２３および内型２５，２６との間には、微小な隙間が形成されている。これにより、円筒部材２２の軸方向寸法が減少すると共に、境界部分のみが増肉される。第３の工程後の境界部分の肉厚ｔ２は、第１の工程で得られた円筒部材２２の肉厚ｔより厚くなっている（ｔ１＜ｔ＜ｔ２）。これにより、柱部１５の肉厚を全体的に厚くして強度を向上するのではなく、直線部分の肉厚を薄くし、応力集中の生じる境界部分の肉厚を選択的に厚くすることによって強度を向上する。したがって、保持器１３を軽量化することができる。また、このとき、同時に境界部分の曲率半径ｒも直線部分の肉厚ｔ１より小さくなる。さらに、この工程で、円筒部材２２の軸方向両端面には、圧縮治具２８，２９の先端面における凸部により、油溝１４ａが形成される。 At this time, since the inner and outer diameter surfaces of the straight portion are constrained by the outer mold 23 and the inner molds 25 and 26, the wall thickness does not change. On the other hand, a minute gap is formed between the boundary portion and the outer mold 23 and the inner molds 25 and 26. Thereby, while the axial direction dimension of the cylindrical member 22 reduces, only a boundary part is thickened. The thickness t 2 of the boundary portion after the third step is thicker than the thickness t of the cylindrical member 22 obtained in the first step (t 1 <t <t 2 ). Accordingly, the thickness of the column portion 15 is not increased overall to improve the strength, but the thickness of the straight portion is reduced, and the thickness of the boundary portion where stress concentration occurs is selectively increased. Improve strength. Therefore, the cage 13 can be reduced in weight. At this time, the radius of curvature r of the boundary portion is also smaller than the thickness t 1 of the straight portion. Further, in this step, oil grooves 14 a are formed on both end surfaces in the axial direction of the cylindrical member 22 by the convex portions on the front end surfaces of the compression jigs 28 and 29.

次に、図６に示す第４の工程では、円筒部材２２にポケット２０および油溝１６ｄ，１７ｄを形成する（Ｓ１４）。具体的には、打ち抜き加工によって円筒部材２２の円周面に複数の矩形形状のポケット２０および油溝１６ｄ，１７ｄを形成する。次に、しごき加工によって第１および第２のころ止め部１６ａ，１７ａ、案内面１６ｂ，１７ｂ，１８ｂ、および非接触部１６ｃ，１７ｃをそれぞれ形成する。   Next, in the fourth step shown in FIG. 6, the pocket 20 and the oil grooves 16d and 17d are formed in the cylindrical member 22 (S14). Specifically, a plurality of rectangular pockets 20 and oil grooves 16d and 17d are formed on the circumferential surface of the cylindrical member 22 by punching. Next, the first and second roller stoppers 16a and 17a, the guide surfaces 16b, 17b and 18b, and the non-contact parts 16c and 17c are formed by ironing, respectively.

次に、図６に示す第５の工程では、保持器１３に表面硬さ等の所定の機械的性質を付与するために熱処理を施す（Ｓ１５）。熱処理としては、保持器１３が十分な深さの硬化層を得るために、出発材料の炭素含有量によって適切な方法を選択する必要がある。具体的には、炭素含有量が０．１５ｗｔ％以上０．５ｗｔ％以下の材料の場合には浸炭焼入処理を、炭素含有量が０．５ｗｔ％以上１．１ｗｔ％以下の材料の場合には光輝焼入処理または高周波焼入処理を施す。   Next, in a fifth step shown in FIG. 6, heat treatment is performed to impart predetermined mechanical properties such as surface hardness to the cage 13 (S15). As the heat treatment, it is necessary to select an appropriate method depending on the carbon content of the starting material in order for the cage 13 to obtain a cured layer having a sufficient depth. Specifically, in the case of a material having a carbon content of 0.15 wt% or more and 0.5 wt% or less, carburizing and quenching treatment is performed, and in the case of a material having a carbon content of 0.5 wt% or more and 1.1 wt% or less. Performs bright quenching or induction quenching.

浸炭焼入処理は、高温の鋼に炭素が固溶する現象を利用した熱処理方法であって、鋼内部は炭素量が低いまま、炭素量の多い表面層（浸炭硬化層）を得ることができる。これにより、表面は硬く、内部は軟らかく靭性の高い性質が得られる。また、浸炭窒化処理設備と比較して設備費用が安価である。   The carburizing and quenching process is a heat treatment method utilizing the phenomenon that carbon dissolves in high-temperature steel, and a surface layer (carburized hardened layer) with a large amount of carbon can be obtained while the amount of carbon in the steel is low. . Thereby, the surface is hard, the inside is soft, and the property with high toughness is obtained. Moreover, the equipment cost is low compared with the carbonitriding equipment.

光輝焼入処理は、保護雰囲気や真空中で加熱することによって、鋼表面の酸化を防止しながら行う焼入処理を指す。また、浸炭窒化処理設備や浸炭焼入処理設備と比較して設備費用が安価である。   The bright quenching process refers to a quenching process performed while preventing oxidation of the steel surface by heating in a protective atmosphere or vacuum. In addition, the equipment cost is low compared with carbonitriding equipment and carburizing and quenching equipment.

高周波焼入処理は、誘導加熱の原理を利用して、鋼表面を急速に加熱、急冷して焼入硬化層を作る方法である。他の焼入処理設備と比較して設備費用が大幅に安価であると共に、熱処理工程でガスを使用しないので環境に優しいというメリットがある。また、部分的な焼入処理が可能となる点でも有利である。   Induction hardening is a method of making a hardened hardened layer by rapidly heating and rapidly cooling the steel surface using the principle of induction heating. Compared to other quenching treatment facilities, there is a merit that the equipment cost is significantly lower and that the gas is not used in the heat treatment process, so that it is environmentally friendly. It is also advantageous in that a partial quenching process can be performed.

さらに、焼入によって生じた残留応力や内部ひずみを低減し、靭性の向上や寸法を安定化させるために、上記の焼入処理の後に焼戻を行うのが望ましい。   Furthermore, it is desirable to perform tempering after the above-mentioned quenching treatment in order to reduce residual stress and internal strain caused by quenching and to improve toughness and stabilize dimensions.

上記の各工程を経ることによって、保持器１３を得ることができる。なお、保持器１３の外径面の表面粗さＲａは、円筒部材２２の形成（Ｓ１１）の際のしごき加工において、既に０．０５μｍ以上０．３μｍ以下となっている。したがって、仕上げ加工工程としての独立した研削加工工程は、省略することができる。   The cage 13 can be obtained through the above steps. The surface roughness Ra of the outer diameter surface of the cage 13 is already 0.05 μm or more and 0.3 μm or less in the ironing process when the cylindrical member 22 is formed (S11). Therefore, an independent grinding process as a finishing process can be omitted.

また、図１５に示す増肉加工工程（Ｓ１３）においても、境界部分の増肉と、油溝１４ａの形成とを同時に行うことができる。したがって、加工工程を簡素化して、安価な保持器１３を得ることができる。ただし、これに限ることなく、先端面が平坦な圧縮治具による境界部分の増肉加工と、先端面に油溝１４ａを形成するための凹凸を有する圧印治具による圧印加工とを別々に行ってもよい。   Moreover, also in the thickening process (S13) shown in FIG. 15, the thickening of the boundary portion and the formation of the oil groove 14a can be performed simultaneously. Therefore, it is possible to simplify the machining process and obtain an inexpensive cage 13. However, the present invention is not limited to this, and the thickening process of the boundary portion by the compression jig having a flat tip surface and the coining process by the coining jig having the unevenness for forming the oil groove 14a on the tip surface are separately performed. May be.

なお、上記の実施形態においては、柱中央部１６および柱端部１７の肉厚を実質的に等しく設定した例を説明したが、軸方向の通油性をさらに向上させたい場合には、柱端部１７の肉厚を柱中央部１６の肉厚より小さくすればよい。こうすることにより、針状ころ軸受１１に流れ込む、または、針状ころ軸受１１から出て行く潤滑油の量を多くすることができる。   In the above embodiment, an example in which the thicknesses of the column center portion 16 and the column end portion 17 are set substantially equal to each other has been described. However, when further improving the oil permeability in the axial direction, The thickness of the portion 17 may be made smaller than the thickness of the column central portion 16. By doing so, it is possible to increase the amount of lubricating oil flowing into the needle roller bearing 11 or exiting from the needle roller bearing 11.

また、この場合、柱中央部１６および柱端部１７の肉厚は、図１１〜図１４に示す拡開プレス工程（Ｓ１２）で使用する金型の形状によって、調整することができる。具体的には、外型２３の大径部２３ｃと内型２５，２６の大径部２５ｂ，２６ｂとの間隔を、外型２３の小径部２３ｂと内型２５，２６の小径部２５ａ，２６ａとの間隔より小さくする。そうすると、上記した保持器１３の製造の工程に新たな工程を追加することなく、柱端部１７の肉厚を柱中央部１６の肉厚より小さくすることができる。   Further, in this case, the thickness of the column center portion 16 and the column end portion 17 can be adjusted by the shape of the mold used in the expanding press step (S12) shown in FIGS. Specifically, the distance between the large diameter portion 23c of the outer mold 23 and the large diameter portions 25b and 26b of the inner molds 25 and 26 is set so that the small diameter portion 23b of the outer mold 23 and the small diameter portions 25a and 26a of the inner molds 25 and 26 are reduced. Smaller than the interval. Then, the thickness of the column end portion 17 can be made smaller than the thickness of the column central portion 16 without adding a new process to the above-described manufacturing process of the cage 13.

また、上記の実施形態においては、柱中央部１６、一対の柱端部１７、および一対の柱傾斜部１８を形成する方法として、拡開プレス（Ｓ１２）の例を説明したが、これに限ることなく、円筒部材２２の軸方向中央部を縮径させ、柱中央部１６、一対の柱端部１７、および一対の柱傾斜部１８を形成してもよい（縮径プレス）。具体的には、図６に示す円筒部材２２の形成工程（Ｓ１１）において、直径が柱端部１７の外径寸法に一致する円筒部材２２を得る。そして、図１１を参照して、まず、第１および第２の内型２５，２６が軸方向に前進すると、大径部２５ｂ，２６ｂが円筒部材２２の内径面を拘束し、小径部２５ａ，２６ａと円筒部材２２の内径面との間に隙間が形成される。次に、第１〜第４の分割外型２４ａ〜２４ｄが径方向に前進すると、小径部２３ｂおよび傾斜部２３ｄによって、円筒部材２２の軸方向中央部が径方向内側に押し縮められる。   Moreover, in said embodiment, although the example of the expansion press (S12) was demonstrated as a method of forming the pillar center part 16, a pair of pillar edge part 17, and a pair of pillar inclination part 18, it is restricted to this. Without reducing the diameter, the central portion of the cylindrical member 22 in the axial direction may be reduced in diameter to form the column central portion 16, the pair of column end portions 17, and the pair of column inclined portions 18 (diameter reduction press). Specifically, in the cylindrical member 22 forming step (S <b> 11) shown in FIG. 6, the cylindrical member 22 whose diameter matches the outer diameter of the column end portion 17 is obtained. Referring to FIG. 11, first, when the first and second inner dies 25, 26 advance in the axial direction, the large diameter portions 25 b, 26 b restrain the inner diameter surface of the cylindrical member 22, and the small diameter portions 25 a, 25 a, A gap is formed between 26 a and the inner diameter surface of the cylindrical member 22. Next, when the first to fourth divided outer dies 24a to 24d advance in the radial direction, the central portion in the axial direction of the cylindrical member 22 is compressed inward in the radial direction by the small diameter portion 23b and the inclined portion 23d.

これにより、柱中央部１６、一対の柱端部１７、および一対の柱傾斜部１８がそれぞれ形成される。この場合においても同様に、第２の工程終了後の柱中央部１６、一対の柱端部１７、および一対の柱傾斜部１８の肉厚ｔ１は、円筒部材２２の肉厚ｔより薄くなっている（ｔ１＜ｔ）。 Thereby, the pillar center part 16, a pair of pillar edge part 17, and a pair of pillar inclination part 18 are each formed. Similarly, in this case, the thickness t 1 of the column center portion 16, the pair of column end portions 17, and the pair of column inclined portions 18 after the second step is smaller than the thickness t of the cylindrical member 22. (T 1 <t).

次に、図１６〜図２３を参照して、この発明の他の実施形態に係る保持器３３およびその製造方法を説明する。なお、共通する構成要素には保持器１３と同一の参照番号を付し、説明は省略する。   Next, with reference to FIGS. 16-23, the holder | retainer 33 which concerns on other embodiment of this invention, and its manufacturing method are demonstrated. In addition, the same reference number as the retainer 13 is attached | subjected to a common component and description is abbreviate | omitted.

まず、図１６〜図２０を参照して、保持器３３は、一対のリング部１４それぞれから径方向内側に延びる一対の鍔部１９をさらに備える。なお、リング部１４の肉厚と鍔部１９の軸方向の肉厚とは、他の直線部分の肉厚ｔ１と実質的に等しく設定されている。また、リング部１４と鍔部１９との境界部分の肉厚は、他の境界部分の肉厚ｔ２と実質的に等しく設定されている。さらに、リング部１４と鍔部１９との境界部分の曲率半径は、他の境界部分の曲率半径ｒと実質的に等しく設定されている。 First, with reference to FIGS. 16 to 20, the retainer 33 further includes a pair of flanges 19 extending radially inward from each of the pair of ring portions 14. Note that the thickness of the ring portion 14 and the thickness of the flange portion 19 in the axial direction are set to be substantially equal to the thickness t 1 of the other straight portions. Further, the thickness of the boundary portion between the ring portion 14 and the flange portion 19 is thick t 2 is substantially equal to the settings of other boundary. Further, the curvature radius of the boundary portion between the ring portion 14 and the flange portion 19 is set to be substantially equal to the curvature radius r of the other boundary portion.

つまり、この実施形態においてもｔ１＜ｔ２が成立する。これにより、既に説明した効果に加えて、鍔部１９の根元部分の強度が向上する。また、ｒ＜ｔ１も成立する。これにより、リング部１４の外径面の表面積が増加するので、保持器３３が外径側案内の場合にハウジングとの接触面圧をさらに低減することができる。なお、その他の構成は保持器１３と共通するので、説明は省略する。 That is, t 1 <t 2 is also established in this embodiment. Thereby, in addition to the effect already demonstrated, the intensity | strength of the root part of the collar part 19 improves. In addition, r <t 1 is also established. Thereby, since the surface area of the outer diameter surface of the ring part 14 increases, when the retainer 33 is an outer diameter side guide, the contact surface pressure with the housing can be further reduced. In addition, since the other structure is common with the holder | retainer 13, description is abbreviate | omitted.

上記構成の保持器３３の製造工程のうち、図６の第１の工程（Ｓ１１）、第２の工程（Ｓ１２）、第４の工程（Ｓ１４）、および第５の工程（Ｓ１５）は保持器１３と共通するので説明は省略する。図２１〜図２３を参照して保持器３３の増肉加工（図６のＳ１３に対応）を説明する。   Among the manufacturing steps of the cage 33 having the above configuration, the first step (S11), the second step (S12), the fourth step (S14), and the fifth step (S15) in FIG. 13 and is not described here. With reference to FIGS. 21 to 23, the process of increasing the thickness of the cage 33 (corresponding to S13 in FIG. 6) will be described.

この実施形態においては、境界部分の増肉加工と鍔部１９の形成（ネッキング加工）とを同時に行う。より具体的には、鍔部１９は、前処理工程と後処理工程の２段階の工程を経て形成される。そして、増肉加工は後処理工程と同時に行われる。   In this embodiment, the process of increasing the thickness of the boundary portion and the formation of the flange portion 19 (necking process) are performed simultaneously. More specifically, the collar portion 19 is formed through two stages of a pretreatment process and a posttreatment process. And the thickening process is performed simultaneously with the post-processing step.

まず、図２１を参照して、前処理工程は、鍔部１９となる円筒部材４２の軸方向両端部を柱端部１７に対して所定の角度（この実施形態では４５°）内側に折り曲げる工程であって、ネッキング用外型４３（以下、単に「外型４３」という）と、ネッキング用内型４５（以下、単に「内型４５」という）と、一対のネッキング治具４８，４９とによって行われる。   First, referring to FIG. 21, the pretreatment step is a step of bending both ends in the axial direction of the cylindrical member 42 to be the flange portion 19 inward with respect to the column end portion 17 by a predetermined angle (45 ° in this embodiment). A necking outer mold 43 (hereinafter simply referred to as “outer mold 43”), a necking inner mold 45 (hereinafter simply referred to as “inner mold 45”), and a pair of necking jigs 48 and 49. Done.

外型４３は、拡開プレス用外型２３と同様の構成であって、円筒部材４２の外径面を拘束する。ただし、軸方向長さが拡開プレス用外型２３より短く、鍔部１９となる円筒部材４２の軸方向両端部を拘束しないようになっている。   The outer mold 43 has the same configuration as the outer mold 23 for the expansion press and restrains the outer diameter surface of the cylindrical member 42. However, the axial length is shorter than the outer mold 23 for the expansion press, and both axial end portions of the cylindrical member 42 serving as the flange portion 19 are not restrained.

内型４５は、外径面の軸方向中央部領域に柱中央部１６の内径寸法に一致する小径部４５ａと、軸方向端部領域に柱端部１７の内径寸法に一致する大径部４５ｂと、小径部４５ａおよび大径部４５ｂの間に柱傾斜部１８に沿う傾斜部４５ｃと、軸方向両端の角部に前処理加工による鍔部１９の折り曲げ角度（４５°）を規定するネッキング部４５ｄとを含む円筒形状の部材である。   The inner mold 45 has a small diameter portion 45a that matches the inner diameter dimension of the column central portion 16 in the axial center region of the outer diameter surface, and a large diameter portion 45b that matches the inner diameter size of the column end portion 17 in the axial end region. An inclined portion 45c along the column inclined portion 18 between the small-diameter portion 45a and the large-diameter portion 45b, and a necking portion that defines a bending angle (45 °) of the flange portion 19 by pre-processing at corners at both axial ends. It is a cylindrical member containing 45d.

図２２を参照して、この内型４５は、例えば、４５°の角度で放射状に分割された第１〜第８の分割内型４６ａ，４６ｂ，４６ｃ，４６ｄ，４６ｅ，４６ｆ，４６ｇ，４６ｈとによって構成される。第１〜第８の分割内型４６ａ〜４６ｈは、それぞれ径方向に移動可能な状態となっている。   Referring to FIG. 22, this inner mold 45 includes, for example, first to eighth divided inner molds 46a, 46b, 46c, 46d, 46e, 46f, 46g, and 46h that are radially divided at an angle of 45 °. Consists of. The first to eighth divided inner dies 46a to 46h are movable in the radial direction.

具体的には、第１〜第８の分割内型４６ａ〜４６ｈを径方向に後退させると、第１〜第８の分割内型４６ａ〜４６ｈを円筒部材４２から出し入れ可能な状態となる。一方、第１〜第８の分割内型４６ａ〜４６ｈを径方向に前進させると、円筒部材４２の内径面を拘束することができる（図２１の状態）。なお、分割内型４６ａ〜４６ｈは、挿入治具４７を挿入することによって前進させることができる。   Specifically, when the first to eighth divided inner dies 46 a to 46 h are retracted in the radial direction, the first to eighth divided inner dies 46 a to 46 h can be put in and out of the cylindrical member 42. On the other hand, when the first to eighth divided inner dies 46a to 46h are advanced in the radial direction, the inner diameter surface of the cylindrical member 42 can be constrained (state shown in FIG. 21). The divided inner dies 46 a to 46 h can be advanced by inserting the insertion jig 47.

ネッキング治具４８は、先端に前処理工程における鍔部１９の傾斜角度（４５°）に沿うネッキング部４８ａを有し、円筒部材４２の軸方向に移動可能な状態となっている。ネッキング治具４９も同様の構成である。そして、一対のネッキング治具４８，４９を軸方向に後退させると、円筒部材４２を円筒空間から出し入れ可能な状態となる。一方、一対のネッキング治具４８，４９を軸方向に前進させると、円筒部材４２の軸方向両端部（図２１中の破線で示す部分）を所定の角度（４５°）内側に折り曲げることができる。   The necking jig 48 has a necking portion 48 a along the inclination angle (45 °) of the flange portion 19 in the pretreatment process at the tip, and is movable in the axial direction of the cylindrical member 42. The necking jig 49 has the same configuration. When the pair of necking jigs 48 and 49 are retracted in the axial direction, the cylindrical member 42 can be taken in and out of the cylindrical space. On the other hand, when the pair of necking jigs 48 and 49 are advanced in the axial direction, both end portions in the axial direction of the cylindrical member 42 (portions indicated by broken lines in FIG. 21) can be bent inward by a predetermined angle (45 °). .

次に、図２３を参照して、後処理工程では、鍔部１９を柱端部１７に対して９０°に折り曲げる。後処理工程における加工治具は、前処理工程で使用したものとほぼ同じ構成のネッキング用外型５４ａ〜５４ｄ（５４ａ，５４ｃのみ図示）、ネッキング用内型５６ａ〜５６ｈ（５６ａ，５６ｅのみ図示）、挿入治具５７、および一対のネッキング治具５８，５９を使用する。ただし、ネッキング用内型５６ａ〜５６ｈおよび一対のネッキング治具５８，５９の鍔部１９に対面する部分には、ネッキング部は設けられていない。   Next, referring to FIG. 23, in the post-processing step, the flange portion 19 is bent at 90 ° with respect to the column end portion 17. The processing jigs in the post-processing step are necking outer dies 54a to 54d (only 54a and 54c are shown) and necking inner dies 56a to 56h (only 56a and 56e are shown) having the same configuration as that used in the pre-processing step. The insertion jig 57 and a pair of necking jigs 58 and 59 are used. However, the necking part is not provided in the part which faces the collar part 19 of the inner molds 56a to 56h for necking and the pair of necking jigs 58 and 59.

後処理工程では、前処理工程と同様の手順で円筒部材４２の内外径面を拘束し、ネッキング治具５８，５９によって鍔部１９を軸方向から圧縮する。これにより、柱端部１７と鍔部１９とのなす角が９０°となる。また、この工程で図６に示す第３の工程（Ｓ１３）と同様に境界部分を増肉し、油溝１４ａを形成することができる。   In the post-processing step, the inner and outer diameter surfaces of the cylindrical member 42 are restrained in the same procedure as in the pre-processing step, and the collar portion 19 is compressed from the axial direction by the necking jigs 58 and 59. Thereby, the angle | corner which the pillar edge part 17 and the collar part 19 make becomes 90 degrees. In this step, the boundary portion can be increased in thickness in the same manner as the third step (S13) shown in FIG. 6 to form the oil groove 14a.

なお、上記の実施形態においては、鋼板（平板）を出発材料として保持器１３，３３を製造した例を示したが、これに限ることなく、パイプ材等の円筒部材を出発材料として製造することもできる。この場合、図６に示す第１の工程（Ｓ１１）は省略することができる。   In the above embodiment, an example in which the cages 13 and 33 are manufactured using a steel plate (flat plate) as a starting material has been shown. However, the present invention is not limited thereto, and a cylindrical member such as a pipe material is manufactured as a starting material. You can also. In this case, the first step (S11) shown in FIG. 6 can be omitted.

また、上記の実施形態においては、凹部は、一対のリング部１４の径方向全域に延びる油溝１４ａである例を説明したが、凹部は、その径方向外側および径方向内側のうちの少なくともいずれか一方と、円周方向両側とを側壁で囲まれた油溜まりであってもよい。   Further, in the above-described embodiment, an example in which the concave portion is the oil groove 14a extending in the entire radial direction of the pair of ring portions 14 has been described. However, the concave portion is at least one of the radially outer side and the radially inner side. It may be an oil sump surrounded by side walls on either side and both sides in the circumferential direction.

図２４は、図１〜図４に示す実施形態の保持器１３において、油溜まり１４ｂ，１４ｃ，１４ｄを設けた例を示す図である。図２５は、図１６〜図１９に示す実施形態の保持器３３において、油溜まり１４ｂ，１４ｃ，１４ｄを設けた例を示す図である。なお、図２４および図２５において、共通する構成要素には保持器１３，３３と同一の参照番号を付し、説明は省略する。   FIG. 24 is a view showing an example in which oil reservoirs 14b, 14c, and 14d are provided in the cage 13 of the embodiment shown in FIGS. FIG. 25 is a diagram showing an example in which oil reservoirs 14b, 14c, and 14d are provided in the retainer 33 of the embodiment shown in FIGS. In FIGS. 24 and 25, common components are denoted by the same reference numerals as those of the cages 13 and 33, and description thereof is omitted.

油溜まり１４ｂは、その径方向内側と、円周方向両側とを側壁で囲まれた形状である。油溜まり１４ｃは、その径方向外側と、円周方向両側とを側壁で囲まれた形状である。油溜まり１４ｄは、その径方向外側および径方向内側と、円周方向両側とを側壁で囲まれた形状である。   The oil sump 14b has a shape in which its radially inner side and both sides in the circumferential direction are surrounded by side walls. The oil sump 14c has a shape in which its radially outer side and both sides in the circumferential direction are surrounded by side walls. The oil sump 14d has a shape in which the radially outer side and the radially inner side and both sides in the circumferential direction are surrounded by side walls.

こうすることにより、油溜まり１４ｂ，１４ｃ，１４ｄは、潤滑油を保持することができる。そうすると、保持器１３，３３の保油性を向上させることができる。具体的には、針状ころ軸受１１，３１の回転に伴う遠心力等によって、油溜まり１４ｂ，１４ｃ，１４ｄに潤滑油が供給され、または、油溜まり１４ｂ，１４ｃ，１４ｄから針状ころ１２等に潤滑油が排出される。これにより、希薄潤滑環境下においても、油膜切れを発生することなく、高い潤滑性能を維持することができる。   By doing so, the oil reservoirs 14b, 14c, and 14d can hold the lubricating oil. If it does so, the oil retention of the holder | retainers 13 and 33 can be improved. Specifically, the lubricating oil is supplied to the oil reservoirs 14b, 14c, and 14d by centrifugal force or the like accompanying the rotation of the needle roller bearings 11 and 31, or the needle rollers 12 and the like are supplied from the oil reservoirs 14b, 14c, and 14d. Lubricating oil is discharged. Thereby, even in a lean lubrication environment, high lubrication performance can be maintained without causing oil film breakage.

なお、上記の実施形態においては、油溝１４ａ、および油溜まり１４ｂ，１４ｃ，１４ｄの形状は、図示するような矩形状である例を説明したが、円形状であってもよいし、その他の形状であってもよい。   In the above embodiment, the oil groove 14a and the oil reservoirs 14b, 14c, and 14d have been illustrated as rectangular shapes as shown in the figure, but may be circular or other shapes. It may be a shape.

また、上記の実施形態においては、凹部は、柱部１５の延長線上にのみ設けられる例を説明したが、これに限ることなく、柱部１５およびポケット２０の延長線上に設けられてもよい。   In the above-described embodiment, the example in which the concave portion is provided only on the extension line of the column portion 15 has been described. However, the present invention is not limited thereto, and the recess portion may be provided on the extension line of the column portion 15 and the pocket 20.

また、上記の実施形態においては、凹部は、油溝１４ａまたは油溜まり１４ｂ，１４ｃ，１４ｄのどちらか一方として設けられる例を説明したが、１つの保持器に油溝１４ａおよび油溜まり１４ｂ，１４ｃ，１４ｄが混在して設けられてもよい。   In the above-described embodiment, the example in which the concave portion is provided as either one of the oil groove 14a or the oil reservoirs 14b, 14c, 14d has been described. However, the oil groove 14a and the oil reservoirs 14b, 14c are provided in one cage. , 14d may be provided together.

また、上記の実施形態においては、ケージ＆ローラタイプの針状ころ軸受１１，３１の例を示したが、この発明は、内輪、および／または、外輪をさらに有する針状ころ軸受にも適用することが可能である。また、転動体として針状ころ１２を採用した例を示したが、これに限ることなく、円筒ころや棒状ころであってもよい。   In the above-described embodiment, examples of the cage roller type needle roller bearings 11 and 31 are shown. However, the present invention is also applied to a needle roller bearing further including an inner ring and / or an outer ring. It is possible. Moreover, although the example which employ | adopted the needle roller 12 as a rolling element was shown, not only this but a cylindrical roller and a rod-shaped roller may be sufficient.

さらに、上記の実施形態に係る針状ころ軸受１１，３１は、例えば、自動車用トランスミッションのアイドラー軸受、およびオートバイ用エンジンのコンロッド大端用軸受として使用することにより、特に有利な効果を奏する。   Furthermore, the needle roller bearings 11 and 31 according to the above-described embodiment exhibit particularly advantageous effects when used as, for example, idler bearings for automobile transmissions and bearings for connecting rod large ends of motorcycle engines.

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

この発明は、ころ軸受用保持器、および針状ころ軸受に有利に利用される。   The present invention is advantageously used for a roller bearing retainer and a needle roller bearing.

この発明の一実施形態に係るころ軸受用保持器を示す斜視図である。It is a perspective view which shows the roller bearing retainer which concerns on one Embodiment of this invention. 図１のころ軸受用保持器を採用した針状ころ軸受を示す斜視図である。It is a perspective view which shows the needle roller bearing which employ | adopted the cage for roller bearings of FIG. 図１のころ軸受用保持器のポケットの構造を示す斜視図である。It is a perspective view which shows the structure of the pocket of the cage for roller bearings of FIG. 図３の矢印ＩＶから見た矢視図である。FIG. 4 is an arrow view seen from an arrow IV in FIG. 3. 図１に示すころ軸受用保持器の変形例であって、図４に対応する図である。FIG. 5 is a modified example of the roller bearing retainer shown in FIG. 1, corresponding to FIG. 4. 図１に示すころ軸受用保持器の主な製造工程を示すフロー図である。It is a flowchart which shows the main manufacturing processes of the cage for roller bearings shown in FIG. 深絞り工程を示す図である。It is a figure which shows a deep drawing process. 打ち抜き加工工程を示す図である。It is a figure which shows a punching process. バーリング加工工程を示す図である。It is a figure which shows a burring process. トリミング加工工程を示す図である。It is a figure which shows a trimming process. 拡開プレス工程の加工前の状態を示す図である。It is a figure which shows the state before the process of an expansion press process. 拡開プレス用外型を軸方向から見た図である。It is the figure which looked at the outer type | mold for expansion presses from the axial direction. 拡開プレス工程の加工途中の状態を示す図である。It is a figure which shows the state in the middle of the process of an expansion press process. 拡開プレス工程の加工後の状態を示す図である。It is a figure which shows the state after a process of an expansion press process. 増肉加工工程を示す図である。It is a figure which shows a thickening process. この発明の他の実施形態に係るころ軸受用保持器を示す斜視図である。It is a perspective view which shows the cage for roller bearings concerning other embodiment of this invention. 図１６のころ軸受用保持器を採用した針状ころ軸受を示す斜視図である。It is a perspective view which shows the needle roller bearing which employ | adopted the cage for roller bearings of FIG. 図１６のころ軸受用保持器のポケットの構造を示す斜視図である。It is a perspective view which shows the structure of the pocket of the cage for roller bearings of FIG. 図１８の矢印ＸＩＸから見た矢視図である。It is the arrow line view seen from the arrow XIX of FIG. 図１６に示すころ軸受用保持器の変形例であって、図１９に対応する図である。FIG. 20 is a modified example of the roller bearing retainer shown in FIG. 16 and corresponds to FIG. 19. 前処理工程を示す図である。It is a figure which shows a pre-processing process. ネッキング用内型を軸方向から見た図である。It is the figure which looked at the inner mold for necking from the axial direction. 後処理工程を示す図である。It is a figure which shows a post-processing process. 図１〜図４に示す実施形態の保持器において、油溜まりを設けた例を示す図である。It is a figure which shows the example which provided the oil sump in the holder | retainer of embodiment shown in FIGS. 図１６〜図１９に示す実施形態の保持器において、油溜まりを設けた例を示す図である。It is a figure which shows the example which provided the oil sump in the holder | retainer of embodiment shown in FIGS.

符号の説明Explanation of symbols

１１，３１ 針状ころ軸受、１２ 針状ころ、１２ａ ピッチ円、１３，３３ 保持器、１４ リング部、１４ａ 油溝、１４ｂ，１４ｃ，１４ｄ 油溜まり、１５ 柱部、１６ 柱中央部、１７ 柱端部、１８ 柱傾斜部、１６ａ，１７ａ ころ止め部、１６ｂ，１７ｂ，１８ｂ 案内面、１６ｃ，１７ｃ 非接触部、１６ｄ，１７ｄ 油溝、１９ 鍔部、２０ ポケット、２１ カップ状部材、２１ａ 底壁、２１ｂ 外向きフランジ部、２１ｃ 内向きフランジ部、２２，４２ 円筒部材、２３，４３ 外型、２３ａ 円筒空間、２３ｂ，２５ａ，２６ａ，４５ａ 小径部、２３ｃ，２５ｂ，２６ｂ，４５ｂ 大径部、２３ｄ，２５ｃ，２６ｃ，４５ｃ 傾斜部、２４ａ，２４ｂ，２４ｃ，２４ｄ，４４ａ，４４ｂ，４４ｃ，４４ｄ，５４ａ，５４ｃ 分割外型、２５，２６，４５ 内型、４６ａ，４６ｂ，４６ｃ，４６ｄ，４６ｅ，４６ｆ，４６ｇ，４６ｈ，５６ａ，５６ｅ 分割内型、２７ 移動治具、２８，２９ 圧縮治具、４７，５７ 挿入治具、４８，４９，５８，５９ ネッキング治具、４５ｄ，４８ａ，４９ａ ネッキング部。   11, 31 needle roller bearing, 12 needle roller, 12a pitch circle, 13, 33 cage, 14 ring part, 14a oil groove, 14b, 14c, 14d oil reservoir, 15 pillar parts, 16 pillar center parts, 17 pillars End part, 18 column inclined part, 16a, 17a roller stopper part, 16b, 17b, 18b guide surface, 16c, 17c non-contact part, 16d, 17d oil groove, 19 collar part, 20 pocket, 21 cup-shaped member, 21a bottom Wall, 21b Outward flange part, 21c Inward flange part, 22, 42 Cylindrical member, 23, 43 Outer mold, 23a Cylindrical space, 23b, 25a, 26a, 45a Small diameter part, 23c, 25b, 26b, 45b Large diameter part 23d, 25c, 26c, 45c Inclined part, 24a, 24b, 24c, 24d, 44a, 44b, 44c, 44d, 54a, 54c min Outer mold, 25, 26, 45 Inner mold, 46a, 46b, 46c, 46d, 46e, 46f, 46g, 46h, 56a, 56e Split inner mold, 27 Moving jig, 28, 29 Compression jig, 47, 57 Insertion Jig, 48, 49, 58, 59 Necking jig, 45d, 48a, 49a Necking part.

Claims (7)

円環形状の一対のリング部と、
軸方向中央部領域で相対的に径方向内側に位置する柱中央部、軸方向端部領域で相対的に径方向外側に位置する一対の柱端部、および前記柱中央部と前記一対の柱端部それぞれとの間に位置する一対の柱傾斜部を含み、前記一対のリング部を相互に連結する複数の柱部とを備えるころ軸受用保持器において、
円筒部材を径方向に変形させて、前記柱中央部、前記一対の柱端部、および前記一対の柱傾斜部を形成し、
前記円筒部材を軸方向に圧縮して、前記柱中央部、前記一対の柱端部、および前記一対の柱傾斜部の各部の肉厚より隣接する各部の境界部分の肉厚を大きくすると共に、前記円筒部材の軸方向両端面に凹部を形成したことを特徴とする、ころ軸受用保持器。 A pair of ring-shaped ring portions;
A column central portion positioned relatively radially inward in the axial central region, a pair of column ends positioned relatively radially outward in the axial end region, and the column central portion and the pair of columns In a roller bearing retainer comprising a pair of column inclined portions positioned between each of the end portions, and comprising a plurality of column portions interconnecting the pair of ring portions,
A cylindrical member is deformed in a radial direction to form the column central portion, the pair of column end portions, and the pair of column inclined portions,
While compressing the cylindrical member in the axial direction, and increasing the thickness of the boundary portion of each adjacent portion than the thickness of each portion of the column central portion, the pair of column end portions, and the pair of column inclined portions, A roller bearing retainer, wherein concave portions are formed on both axial end surfaces of the cylindrical member. 前記凹部は、前記柱部の延長線上にのみ設けられている、請求項１に記載のころ軸受用保持器。   The roller bearing retainer according to claim 1, wherein the concave portion is provided only on an extension line of the column portion. 前記凹部は、前記リング部の径方向全域に延びる油溝である、請求項１または２に記載のころ軸受用保持器。   The roller bearing retainer according to claim 1 or 2, wherein the concave portion is an oil groove extending in the entire radial direction of the ring portion. 前記凹部は、その径方向外側および径方向内側のうち少なくともいずれか一方と、円周方向両側とを側壁で囲まれた油溜まりである、請求項１または２に記載のころ軸受用保持器。   The roller bearing retainer according to claim 1 or 2, wherein the recess is an oil sump surrounded by side walls at least one of the radially outer side and the radially inner side and both sides in the circumferential direction. 前記円筒部材は、直径が前記柱中央部と実質的に等しく、
前記柱中央部、前記一対の柱端部、および前記一対の柱傾斜部は、前記円筒部材の軸方向両端部を拡径させて形成する、請求項１〜４のいずれかに記載のころ軸受用保持器。 The cylindrical member has a diameter substantially equal to the central portion of the column,
The roller bearing according to any one of claims 1 to 4, wherein the column central portion, the pair of column end portions, and the pair of column inclined portions are formed by expanding both axial end portions of the cylindrical member. Retainer. 前記保持器は、前記一対のリング部それぞれから径方向内側に延びる鍔部をさらに備え、
前記一対のリング部、および前記鍔部の肉厚は、前記リング部と前記鍔部との境界部分の肉厚より小さく、かつ境界部分の曲率半径より大きい、請求項１〜５のいずれかに記載のころ軸受用保持器。 The retainer further includes a flange portion extending radially inward from each of the pair of ring portions,
The thickness of the pair of ring portions and the flange portion is smaller than the thickness of the boundary portion between the ring portion and the flange portion, and larger than the radius of curvature of the boundary portion. The cage for roller bearings described. 複数の針状ころと、
隣接する前記柱部の間に前記ころを収容するポケットが形成されている請求項１〜６のいずれかに記載のころ軸受用保持器とを備える、針状ころ軸受。 A plurality of needle rollers;
A needle roller bearing comprising the roller bearing retainer according to any one of claims 1 to 6, wherein a pocket for accommodating the roller is formed between the adjacent column portions.
JP2007336938A 2007-12-27 2007-12-27 Cage for roller bearing and needle roller bearing Withdrawn JP2009156391A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012210810A (en) * 2011-03-24 2012-11-01 Ntn Corp Injection molding die, resin molded product, and method for producing resin molded product
JP2012210811A (en) * 2011-03-24 2012-11-01 Ntn Corp Molding die for bearing holder, bearing holder, and method for producing bearing holder
CN103415717A (en) * 2011-02-24 2013-11-27 谢夫勒科技股份两合公司 Rolling element cage
CN112739923A (en) * 2018-09-21 2021-04-30 Ntn株式会社 Retainer for ball bearing and rolling bearing
CN114922901A (en) * 2022-05-13 2022-08-19 常熟长城轴承有限公司 Engineering plastic injection molding high-speed angular contact ball bearing retainer and lubricating method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103415717A (en) * 2011-02-24 2013-11-27 谢夫勒科技股份两合公司 Rolling element cage
CN103415717B (en) * 2011-02-24 2016-05-18 舍弗勒技术股份两合公司 Roller holder
JP2012210810A (en) * 2011-03-24 2012-11-01 Ntn Corp Injection molding die, resin molded product, and method for producing resin molded product
JP2012210811A (en) * 2011-03-24 2012-11-01 Ntn Corp Molding die for bearing holder, bearing holder, and method for producing bearing holder
CN112739923A (en) * 2018-09-21 2021-04-30 Ntn株式会社 Retainer for ball bearing and rolling bearing
CN112739923B (en) * 2018-09-21 2023-03-17 Ntn株式会社 Retainer for ball bearing and rolling bearing
CN114922901A (en) * 2022-05-13 2022-08-19 常熟长城轴承有限公司 Engineering plastic injection molding high-speed angular contact ball bearing retainer and lubricating method thereof

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