JP4066717B2 - Roller bearing cage - Google Patents

Roller bearing cage Download PDF

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Publication number
JP4066717B2
JP4066717B2 JP2002163060A JP2002163060A JP4066717B2 JP 4066717 B2 JP4066717 B2 JP 4066717B2 JP 2002163060 A JP2002163060 A JP 2002163060A JP 2002163060 A JP2002163060 A JP 2002163060A JP 4066717 B2 JP4066717 B2 JP 4066717B2
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Japan
Prior art keywords
outer peripheral
peripheral wall
cage
side wall
wall
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Japanese (ja)
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JP2004011689A (en
Inventor
豊 下田
崇彦 佐藤
佳友 樺山
佐藤　　寛
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JTEKT Corp
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JTEKT Corp
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—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
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • 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
    • F16C9/00—Bearings for crankshafts or connecting-rods; Attachment of connecting-rods
    • F16C9/04—Connecting-rod bearings; Attachments thereof

Description

【０００１】
【発明の属する技術分野】
本発明は、ころ軸受用保持器に関する。
【０００２】
【従来の技術】
ボート等に付設されるエンジンには、その内燃機関の構成部品としてコンロッドが使用される。このコンロッドの大端部および小端部の運動を支持するころ軸受として、保持器付き針状ころ軸受が用いられる。
【０００３】
この保持器付き針状ころ軸受の保持器には、例えば断面が門型形状をした門型保持器と呼ばれるものがある。この門型保持器は、円筒状に形成されるとともに、周方向複数箇所にころ保持用のポケットを有する。このポケットの周方向壁面は、針状ころの転がり軌道面として用いられる。
【０００４】
【発明が解決しようとする課題】
一般に、エンジンに付設されるコンロッドは、高負荷、高回転数で使用されるる。そのため、門型保持器のポケットの周方向壁面である針状ころの転がり軌道面は、焼付きやすい。このような焼付きを防止するうえで、針状ころの転がり軌道面に対して潤滑剤を供給する必要がある。
【０００５】
本発明の少なくともひとつの目的は、針状ころの転がり軌道面に対して充分な量の潤滑剤を供給可能であり、かつ剛性を確保し得る保持器を提供することにある。
【０００６】
【課題を解決するための手段】
本発明のころ軸受用保持器は、環状の外周壁と、この外周壁の幅方向両側に径方向内向きに一体的に形成される側壁と、ころを装着するための複数個のポケットとを含み、前記各側壁の径方向の厚みは、前記外周壁の径方向の厚みに比べて厚く形成され、前記各ポケットは、前記外周壁から前記側壁に亙って、かつ円周方向複数箇所に配置され、前記各ポケットにおける側壁の円周方向対向面は、ころの転動を案内するころ転がり軌道面として用いられ、前記側壁の外周面には、前記ころ転がり軌道面に潤滑剤を供給するための、円周方向に沿いかつ前記ころ転がり軌道面に連通する潤滑剤供給溝が形成され、この潤滑剤供給溝は、その内面から前記外周壁と側壁との連接部位までの最短距離を、前記外周壁の径方向の厚みと実質等しいかそれ以上とする位置に設定されている。特に、前記潤滑剤供給溝は、その内面が、異なる曲率を有する円弧状面の組合わせからなる。
【０００７】
環状の外周壁と、この外周壁の幅方向両側に径方向内向きに一体的に形成される側壁と、ころを装着するための複数個のポケットとを含む構成の保持器は、門型保持器と称される。外周壁と側壁との連接部位とは、外周壁と側壁との連続部分である隅部を意味する。最短距離は、ころ軸受用保持器に、その使用時に応力集中が生じにくくするために設定される距離である。
【０００８】
そして潤滑剤供給溝は、側壁の外周面に、ころ転がり軌道面に連通するよう形成されている構成から、充分な量の潤滑剤をころ転がり軌道面に供給可能な深さを確保しながら、ころ軸受における保持器として必要な剛性を確保することができる。
【０００９】
【発明の実施の形態】
以下、本発明の実施形態に係るころ軸受用保持器を、図面に基づいて説明する。図１はころ軸受用保持器の全体構成を示す斜視図、図２は部分拡大斜視図、図３は要部拡大断面図、図４は使用状態を示す断面図である。
【００１０】
図１および図２に示すように、ころ軸受用保持器（以下単に「保持器」という）１は、保持器付き針状ころ軸受２の構成部品として用いられるもので、門型保持器と称される。すなわち、保持器付き針状ころ軸受２は、保持器１と針状ころ９とから構成される。この保持器付き針状ころ軸受２は、図４に示すように、エンジンの内燃機関の構成部品として用いられるコンロッド３の大端部４ａおよび小端部４ｂに形成された挿通穴５の周面と、挿通穴５に挿通する軸体６の周面との間に介装して使用される。
【００１１】
保持器１は、環状の外周壁７と、この外周壁７の幅方向（軸体６の軸心方向）両側位置に、径方向内向きに一体的に形成される側壁８と、針状ころ９を装着するためのポケット１０とを有する。両側壁８，８間には、保持器１の断面を径方向内側開放のコ字形の門型とするための凹部１ａが形成されている。それぞれの側壁８における径方向の厚み１１は、外周壁７の厚み１２に比べて厚く形成されている。
【００１２】
ポケット１０は、外周壁７と側壁８の一部とに亙って打抜かれることで形成されている。保持器１は、円周方向の複数箇所にポケット１０を有する。各ポケット１０における側壁８の円周方向対向面は、針状ころ９の転がり軌道面１３として用いられる。
【００１３】
外周壁７の外周面上に、ローレット加工による二条のローレット溝１４が施されている。側壁８の内周面上に、ローレット加工による二条のローレット溝１５が施されている。このようにローレット加工を施すことにより、各ポケット１０に対して金属材料を塑性流動させ、外周壁７側の外側ころ保持片１６、および側壁８側の内側ころ保持片１７が形成される。
【００１４】
側壁８の外周面上に、転がり軌道面１３に対して潤滑剤を供給するための、ローレット溝１４，１５とは別の二条の潤滑剤供給溝１８が、円周方向に沿って形成されている。各潤滑剤供給溝１８は、側壁８外周面上の前記転がり軌道面１３に径方向で対応する位置で可及的に外周壁７寄りに配置されている。図３で示すように、各潤滑剤供給溝１８の内面としての底面１９は、異なる曲率を有する円弧状面２０，２１の組合わせからなる。
【００１５】
各潤滑剤供給溝１８の底面１９は、幅方向内側の円弧状面２０の曲率が、幅方向外側の円弧状面２１の曲率に比べて小さく設定されている。この構成により、各潤滑剤供給溝１８において、その幅方向内側の底面１９から、外周壁７と側壁８との連接部位２２までの距離２３が、外周壁７の厚み１２以上となる位置に設定されている。このような底面１９が、転がり軌道面１３に連続されるよう形成されている。
【００１６】
上記構成において、各ポケット１０に針状ころ９を、外側ころ保持片１６の弾性に抗して挿入することで、各針状ころ９は、外側ころ保持片１６および内側ころ保持片１７によって各ポケット１０に保持される。
【００１７】
ところで、エンジンの駆動に伴なってコンロッド３が稼動すると、コンロッド３に形成された不図示の潤滑剤導入孔から潤滑剤がコンロッド３の挿通穴５に入り込む。続いて、保持器付き針状ころ軸受２に対して潤滑剤が供給される。そして潤滑剤は、保持器１に形成された潤滑剤供給溝１８に至る。
【００１８】
これら潤滑剤供給溝１８は、側壁８外周面上で、針状ころ９の転がり軌道面１３に径方向で対応する位置に形成されているため、潤滑剤供給溝１８に至った潤滑剤は、直接的に針状ころ９の各転がり軌道面１３に伝わるように円滑に供給され、これら各転がり軌道面１３が確実に潤滑されることになる。このため、厳しい環境下で使用されるコンロッド３であっても、確実に転がり軌道面１３の焼付きを防止することができる。
【００１９】
ここで、転がり軌道面１３の温度について、本実施形態における実施品と従来品とで実験した比較結果を、下記（表１）に示す。なお、実施品、従来品ともに自転速度／公転速度で表される評価回転速度は同一の条件とした。
【００２０】
【表１】

Figure 0004066717
上記（表１）から同一の評価回転速度において、転がり軌道面１３の温度は実施品の方が著しく低いことがわかり、潤滑剤供給溝１８の効果が確認された。
【００２１】
さらに、この実施形態における保持器１は、外周壁７と側壁８との連接部位２２から潤滑剤供給溝１８の幅方向内側の底面１９までの最短距離２３を、外周壁７の厚み１２以上となる位置に設定しているので、外周壁７から側壁８にかけて応力集中する箇所がない。
【００２２】
このことから、転がり軌道面１３に充分な量の潤滑剤を供給可能な深さを確保しつつ、保持器付き針状ころ軸受２の構成部品として用いられる門型保持器として、充分な剛性を確保することができる。
【００２３】
図５に保持器１の別の形態を示す。図５は保持器１の部分拡大斜視図である。上記実施形態では、保持器１の外周壁７にローレット加工を施して針状ころ軸受の外側ころ保持片１６を形成した。これに対し、図５に示す保持器１は、外側ころ保持片１６を形成する代わりに、外周壁７そのものに針状ころ９を外側で保持する台形状の鍔部３０を加工している。潤滑剤供給溝１８の形状および配置位置は上記実施形態と同様である。保持器１における他の構成も上記実施形態と同様であるので、同一の符号を付してその説明を省略する。そしてこのような形状を有する門型保持器の場合も、上記実施形態と同様の作用効果を奏し得る。
【００２４】
さらに、上記各実施形態では潤滑剤供給溝１８において、その底面１９が異なる曲率を有する円弧状面２０，２１の組合わせから形成したが、本発明はこれに限定されるものではなく、例えば平坦な底壁面と、この底壁面から径方向外向きに直角方向に連続する両側面とで内面を形成する、矩形断面の潤滑剤供給溝１８が考えられる。
【００２５】
この場合、外周壁７と側壁８との連接部位２２から、潤滑剤供給溝１８の底壁面と幅方向内側の側面の隅部（角部）までの距離が、外周壁７の厚み１２以上となる位置に設定される。このように構成することにより、局所的な応力集中を回避して、保持器付き針状ころ軸受２の構成部品として用いられる門型保持器として、充分な剛性を確保することができる。
【００２６】
このように、潤滑剤供給溝１８は、転がり軌道面１３に対して充分に潤滑剤を供給可能な断面積を有して、側壁８の外周面上で、応力集中が発生しない位置、あるいは形状であればよい。
【００２７】
【発明の効果】
以上の説明から明らかな通り、本発明のころ軸受用保持器によれば、ころ転がり軌道面に充分な量の潤滑剤を供給して、その焼付きを防止できるとともに、厳しい条件下で使用されたとしても、ころ軸受用保持器として充分な剛性を確保することができる。
【図面の簡単な説明】
【図１】 本発明の実施形態を示すころ軸受用保持器の全体構成を示す斜視図である。
【図２】 同じく部分拡大斜視図である。
【図３】 同じく使用状態を示す断面図である。
【図４】 同じく使用状態を示す断面図である。
【図５】 別の実施形態を示すころ軸受用保持器の部分拡大斜視図である。
【符号の説明】
１ 保持器
２ 保持器付き針状ころ軸受
３ コンロッド
４ａ コンロッドの大端部
４ｂ コンロッドの小端部
７ 外周壁
８ 側壁
９ 針状ころ
１０ ポケット
１１ 側壁の径方向の厚み
１２ 外周壁の厚み
１３ 転がり軌道面
１８ 潤滑剤供給溝
１９ 潤滑剤供給溝の底面
２０，２１ 円弧状面[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a roller bearing retainer.
[0002]
[Prior art]
For an engine attached to a boat or the like, a connecting rod is used as a component of the internal combustion engine. A needle roller bearing with a cage is used as a roller bearing that supports the movement of the large end and the small end of the connecting rod.
[0003]
An example of a cage of this needle roller bearing with a cage is a so-called portal cage having a portal shape in cross section. This portal retainer is formed in a cylindrical shape and has pockets for retaining rollers at a plurality of locations in the circumferential direction. The circumferential wall surface of the pocket is used as a rolling raceway surface for the needle rollers.
[0004]
[Problems to be solved by the invention]
Generally, a connecting rod attached to an engine is used at a high load and a high rotation speed. Therefore, the rolling raceway surface of the needle roller which is the circumferential wall surface of the pocket of the portal cage is easily seized. In order to prevent such seizure, it is necessary to supply a lubricant to the rolling raceway surface of the needle roller.
[0005]
At least one object of the present invention is to provide a cage capable of supplying a sufficient amount of lubricant to the rolling raceway surface of a needle roller and ensuring rigidity.
[0006]
[Means for Solving the Problems]
The cage for roller bearings of the present invention includes an annular outer peripheral wall, side walls integrally formed radially inward on both sides in the width direction of the outer peripheral wall, and a plurality of pockets for mounting the rollers. And the radial thickness of each side wall is formed thicker than the radial thickness of the outer peripheral wall, and the pockets extend from the outer peripheral wall to the side wall and at a plurality of locations in the circumferential direction. The circumferentially opposed surfaces of the side walls in the respective pockets are used as roller rolling raceway surfaces for guiding roller rolling, and lubricant is supplied to the roller rolling raceway surfaces on the outer peripheral surfaces of the side walls. Therefore, a lubricant supply groove is formed along the circumferential direction and in communication with the roller rolling raceway surface, and the lubricant supply groove has a shortest distance from the inner surface to the connection portion between the outer peripheral wall and the side wall. A thickness substantially equal to the radial thickness of the outer peripheral wall. It is set in a position with the least. In particular, the lubricant supply groove comprises a combination of arcuate surfaces whose inner surfaces have different curvatures.
[0007]
A cage having a structure including an annular outer peripheral wall, side walls integrally formed radially inward on both sides in the width direction of the outer peripheral wall, and a plurality of pockets for mounting rollers It is called a vessel. The connection part of an outer peripheral wall and a side wall means the corner | angular part which is a continuous part of an outer peripheral wall and a side wall. The shortest distance is a distance set in order to make it difficult for stress concentration to occur in the roller bearing retainer during use.
[0008]
And since the lubricant supply groove is formed on the outer peripheral surface of the side wall so as to communicate with the roller rolling raceway surface, while ensuring a depth at which a sufficient amount of lubricant can be supplied to the roller rolling raceway surface, The rigidity required as a cage in the roller bearing can be ensured.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a roller bearing retainer according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view showing the overall configuration of a roller bearing cage, FIG. 2 is a partially enlarged perspective view, FIG. 3 is an enlarged sectional view of a main part, and FIG. 4 is a sectional view showing a use state.
[0010]
As shown in FIGS. 1 and 2, a roller bearing retainer (hereinafter simply referred to as “retainer”) 1 is used as a component of a needle roller bearing 2 with a retainer, and is called a portal retainer. Is done. That is, the needle roller bearing 2 with a cage is composed of the cage 1 and the needle roller 9. As shown in FIG. 4, the needle roller bearing 2 with a cage has a peripheral surface of an insertion hole 5 formed in a large end 4a and a small end 4b of a connecting rod 3 used as a component of an internal combustion engine of an engine. And the shaft 6 inserted through the insertion hole 5 and used.
[0011]
The cage 1 includes an annular outer peripheral wall 7, side walls 8 that are integrally formed radially inward at positions on both sides of the outer peripheral wall 7 in the width direction (axial center direction of the shaft body 6), and needle rollers. 9 and a pocket 10 for mounting 9. Between both side walls 8, 8 is formed a recess 1 a for making the cage 1 into a U-shaped gate shape having a radially inner opening. The thickness 11 in the radial direction of each side wall 8 is formed thicker than the thickness 12 of the outer peripheral wall 7.
[0012]
The pocket 10 is formed by being punched over the outer peripheral wall 7 and a part of the side wall 8. The cage 1 has pockets 10 at a plurality of locations in the circumferential direction. The circumferentially facing surface of the side wall 8 in each pocket 10 is used as the rolling raceway surface 13 of the needle roller 9.
[0013]
Two knurled grooves 14 are formed on the outer peripheral surface of the outer peripheral wall 7 by knurling. On the inner peripheral surface of the side wall 8, two knurled grooves 15 are formed by knurling. By performing knurling in this way, the metal material is plastically flowed into each pocket 10 to form the outer roller holding piece 16 on the outer peripheral wall 7 side and the inner roller holding piece 17 on the side wall 8 side.
[0014]
Two lubricant supply grooves 18 different from the knurled grooves 14 and 15 for supplying the lubricant to the rolling raceway surface 13 are formed on the outer peripheral surface of the side wall 8 along the circumferential direction. Yes. Each lubricant supply groove 18 is arranged as close to the outer peripheral wall 7 as possible at a position corresponding to the rolling raceway surface 13 on the outer peripheral surface of the side wall 8 in the radial direction. As shown in FIG. 3, the bottom surface 19 as the inner surface of each lubricant supply groove 18 is a combination of arcuate surfaces 20 and 21 having different curvatures.
[0015]
The bottom surface 19 of each lubricant supply groove 18 is set such that the curvature of the arcuate surface 20 on the inner side in the width direction is smaller than the curvature of the arcuate surface 21 on the outer side in the width direction. With this configuration, in each lubricant supply groove 18, the distance 23 from the bottom surface 19 on the inner side in the width direction to the connecting portion 22 between the outer peripheral wall 7 and the side wall 8 is set to a position where the thickness of the outer peripheral wall 7 is 12 or more. Has been. Such a bottom surface 19 is formed so as to be continuous with the rolling raceway surface 13.
[0016]
In the above configuration, the needle rollers 9 are inserted into the pockets 10 against the elasticity of the outer roller holding pieces 16, so that the needle rollers 9 are separated by the outer roller holding pieces 16 and the inner roller holding pieces 17. It is held in the pocket 10.
[0017]
By the way, when the connecting rod 3 is operated as the engine is driven, the lubricant enters the insertion hole 5 of the connecting rod 3 from a lubricant introduction hole (not shown) formed in the connecting rod 3. Subsequently, a lubricant is supplied to the needle roller bearing 2 with a cage. The lubricant reaches the lubricant supply groove 18 formed in the cage 1.
[0018]
Since these lubricant supply grooves 18 are formed on the outer peripheral surface of the side wall 8 at positions corresponding to the rolling raceway surfaces 13 of the needle rollers 9 in the radial direction, the lubricant reaching the lubricant supply groove 18 is Smoothly supplied so as to be directly transmitted to each rolling raceway surface 13 of the needle roller 9, and each rolling raceway surface 13 is reliably lubricated. For this reason, even if it is the connecting rod 3 used in a severe environment, the seizure of the rolling raceway surface 13 can be prevented reliably.
[0019]
Here, the comparison result of the experiment of the embodiment product and the conventional product with respect to the temperature of the rolling raceway surface 13 is shown in the following (Table 1). Note that the evaluation rotational speed represented by the rotation speed / revolution speed was the same for both the practical product and the conventional product.
[0020]
[Table 1]
Figure 0004066717
From the above (Table 1), it was found that at the same evaluation rotational speed, the temperature of the rolling raceway surface 13 was significantly lower in the implemented product, and the effect of the lubricant supply groove 18 was confirmed.
[0021]
Furthermore, the cage 1 in this embodiment is configured such that the shortest distance 23 from the connecting portion 22 between the outer peripheral wall 7 and the side wall 8 to the bottom surface 19 on the inner side in the width direction of the lubricant supply groove 18 is equal to or greater than the thickness 12 of the outer peripheral wall 7. Therefore, there is no place where stress concentrates from the outer peripheral wall 7 to the side wall 8.
[0022]
Therefore, sufficient rigidity as a portal cage used as a component of the needle roller bearing 2 with a cage is secured while ensuring a depth at which a sufficient amount of lubricant can be supplied to the rolling raceway surface 13. Can be secured.
[0023]
FIG. 5 shows another form of the cage 1. FIG. 5 is a partially enlarged perspective view of the cage 1. In the above embodiment, the outer peripheral wall 7 of the cage 1 is knurled to form the outer roller holding piece 16 of the needle roller bearing. On the other hand, in the cage 1 shown in FIG. 5, instead of forming the outer roller holding piece 16, a trapezoidal collar portion 30 that holds the needle rollers 9 on the outer peripheral wall 7 itself is processed. The shape and arrangement position of the lubricant supply groove 18 are the same as in the above embodiment. Since the other structure in the holder | retainer 1 is also the same as that of the said embodiment, the same code | symbol is attached | subjected and the description is abbreviate | omitted. And also in the case of the portal retainer which has such a shape, there can exist an effect similar to the said embodiment.
[0024]
Further, in each of the above embodiments, the lubricant supply groove 18 is formed from a combination of the arcuate surfaces 20 and 21 having the bottom surfaces 19 having different curvatures. However, the present invention is not limited to this, for example, flat A lubricant supply groove 18 having a rectangular cross section is conceivable which forms an inner surface with a straight bottom wall surface and both side surfaces which are continuous radially outward from the bottom wall surface.
[0025]
In this case, the distance from the connection portion 22 between the outer peripheral wall 7 and the side wall 8 to the bottom wall surface of the lubricant supply groove 18 and the corner (corner) of the side surface on the inner side in the width direction is equal to or greater than the thickness 12 of the outer peripheral wall 7. Is set to a position. By comprising in this way, local stress concentration can be avoided and sufficient rigidity can be secured as a portal cage used as a component of the needle roller bearing 2 with cage.
[0026]
As described above, the lubricant supply groove 18 has a cross-sectional area that can sufficiently supply the lubricant to the rolling raceway surface 13, and a position or shape where stress concentration does not occur on the outer peripheral surface of the side wall 8. If it is.
[0027]
【The invention's effect】
As is apparent from the above description, according to the roller bearing cage of the present invention, a sufficient amount of lubricant can be supplied to the roller rolling raceway surface to prevent its seizure and to be used under severe conditions. Even so, sufficient rigidity can be secured as a roller bearing retainer.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an overall configuration of a roller bearing retainer showing an embodiment of the present invention.
FIG. 2 is a partially enlarged perspective view of the same.
FIG. 3 is a cross-sectional view showing the usage state.
FIG. 4 is a cross-sectional view showing the usage state.
FIG. 5 is a partially enlarged perspective view of a roller bearing retainer showing another embodiment.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cage 2 Needle roller bearing with cage 3 Connecting rod 4a Connecting rod large end 4b Connecting rod small end 7 Outer wall 8 Side wall 9 Needle roller 10 Pocket 11 Side wall radial thickness 12 Outer wall thickness 13 Rolling Raceway surface 18 Lubricant supply groove 19 Bottom surface of lubricant supply groove 20, 21 Arc-shaped surface

Claims (1)

環状の外周壁と、この外周壁の幅方向両側に径方向内向きに一体的に形成される側壁と、ころを装着するための複数個のポケットとを含み、
前記各側壁の径方向の厚みは、前記外周壁の径方向の厚みに比べて厚く形成され、前記各ポケットは、前記外周壁から前記側壁に亙って、かつ円周方向複数箇所に配置され、前記各ポケットにおける側壁の円周方向対向面は、ころの転動を案内するころ転がり軌道面として用いられ、
前記側壁の外周面には、前記ころ転がり軌道面に潤滑剤を供給するための、円周方向に沿いかつ前記ころ転がり軌道面に連通する潤滑剤供給溝が形成され、
この潤滑剤供給溝は、その内面が異なる曲率を有する円弧状面の組合わせからなり、かつ、その内面から前記外周壁と側壁との連接部位までの最短距離を、前記外周壁の径方向の厚みと実質等しいかそれ以上とする位置に設定されている、ことを特徴とするころ軸受用保持器。Including an annular outer peripheral wall, side walls integrally formed radially inward on both sides in the width direction of the outer peripheral wall, and a plurality of pockets for mounting the rollers,
The radial thickness of each side wall is formed thicker than the radial thickness of the outer peripheral wall, and the pockets are arranged from the outer peripheral wall to the side wall and at a plurality of locations in the circumferential direction. The circumferentially opposed surfaces of the side walls in each pocket are used as roller rolling raceway surfaces for guiding roller rolling,
On the outer peripheral surface of the side wall, a lubricant supply groove is formed along the circumferential direction and communicating with the roller rolling raceway surface for supplying a lubricant to the roller rolling raceway surface,
The lubricant supply groove comprises a combination of arcuate surfaces having different curvatures on the inner surface , and the shortest distance from the inner surface to the connecting portion between the outer peripheral wall and the side wall is determined in the radial direction of the outer peripheral wall. A roller bearing retainer characterized by being set at a position substantially equal to or greater than the thickness.
JP2002163060A 2002-06-04 2002-06-04 Roller bearing cage Expired - Fee Related JP4066717B2 (en)

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US8602657B2 (en) * 2009-06-15 2013-12-10 Koyo Bearings Usa Llc Cage for bearing assembly
JP6832264B2 (en) * 2017-09-20 2021-02-24 Ntn株式会社 Cage for roller bearings
CN115013442B (en) * 2022-06-30 2023-10-31 中国铁建重工集团股份有限公司 Retainer

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