JP2005061483A - Cage made out of synthetic resin for roller bearing, and roller bearing - Google Patents

Cage made out of synthetic resin for roller bearing, and roller bearing Download PDF

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JP2005061483A
JP2005061483A JP2003290664A JP2003290664A JP2005061483A JP 2005061483 A JP2005061483 A JP 2005061483A JP 2003290664 A JP2003290664 A JP 2003290664A JP 2003290664 A JP2003290664 A JP 2003290664A JP 2005061483 A JP2005061483 A JP 2005061483A
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synthetic resin
roller bearing
peripheral surface
rim
portions
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JP2005061483A5 (en
Inventor
Magozo Hamamoto
孫三 濱本
Manriyou Kiyo
万領 許
Masaharu Nakamura
正治 中村
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NSK Ltd
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NSK Ltd
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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
    • F16C33/4617—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages
    • F16C33/4623—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/4635—Massive or moulded cages having cage pockets surrounding the rollers, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window cages
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/4605—Details of interaction of cage and race, e.g. retention or centring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • 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
    • F16C33/664—Retaining the liquid in or near the bearing
    • F16C33/6651—Retaining the liquid in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—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
    • F16C19/24—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 for radial load mainly
    • F16C19/26—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 for radial load mainly with a single row of 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 secure the durability and stability even under severe use conditions such as high-speed operation and very small lubrication. <P>SOLUTION: Projecting parts 14, 14 respectively having a circular arc-shaped axial cross-section are mounted on outer peripheral faces (guided face) of rim parts 11, 11 composing a cage 10 made out of a synthetic resin, in a state of being projected from the outer peripheral faces. As a result, a lubricant stored in parts out of the projecting parts 14, 14, of the guided faces is taken in a slide-contact part of apex parts of the projecting parts 14, 14 and a guide face of a bearing ring. Whereby the exhaustion of the lubricant on the slide-contact part can be prevented, and a subject of this invention can be achieved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、例えば工作機械の主軸や鉄道車両の車軸等、グリース又は潤滑油によって潤滑されつつ高速で運転される回転体を支持するころ軸受及びこのころ軸受に組み込むころ軸受用合成樹脂製保持器の改良に関する。   The present invention relates to a roller bearing that supports a rotating body that is operated at high speed while being lubricated with grease or lubricating oil, such as a main shaft of a machine tool or an axle of a railway vehicle, and a synthetic resin cage for a roller bearing incorporated in the roller bearing. Regarding improvements.

工作機械の主軸を回転自在に支持する為の軸受には、工作精度の向上の為、高剛性、高回転精度、低発熱等の特性が求められる。又、近年に於いては、加工効率向上の為、高回転速度で長時間安定して使用できる様に、高速安定性が求められている。この様な各特性のうちラジアル方向の剛性を向上させる為に、上記軸受としてころ軸受を使用する場合が多い。図１２〜１３は、この様なころ軸受の１例として、外輪１の軸方向両端部並びに内輪２の軸方向一端部（図１２の左端部）にそれぞれ鍔部６ａ、６ｂ、８を設けた（ＮＪ型の）鍔付きの円筒ころ軸受３を示している。   Bearings for rotatably supporting the spindle of a machine tool are required to have characteristics such as high rigidity, high rotational accuracy, and low heat generation in order to improve the machining accuracy. In recent years, in order to improve processing efficiency, high-speed stability is required so that it can be used stably for a long time at a high rotational speed. Of these characteristics, in order to improve the rigidity in the radial direction, a roller bearing is often used as the bearing. 12 to 13, as an example of such a roller bearing, flanges 6a, 6b, and 8 are provided at both ends in the axial direction of the outer ring 1 and at one end in the axial direction of the inner ring 2 (left end in FIG. 12), respectively. A cylindrical roller bearing 3 with a flange (NJ type) is shown.

この鍔付きの円筒ころ軸受３は、上記外輪１と上記内輪２と複数の円筒ころ４、４とを備える。このうちの外輪１は、内周面の中間部に円筒状の外輪軌道５を、同じく両端部に上記１対の内向鍔部６ａ、６ｂを、それぞれ設けている。又、上記内輪２は、外周面の中間部に円筒状の内輪軌道７を、同じく一端部に上記外向鍔部８を、それぞれ設けている。又、上記複数の円筒ころ４、４は、銅合金等の自己潤滑性を有する金属により造られた、円環状の保持器９により、転動自在に保持された状態で、上記外輪軌道５と上記内輪軌道７との間に設けている。   The flanged cylindrical roller bearing 3 includes the outer ring 1, the inner ring 2, and a plurality of cylindrical rollers 4 and 4. Of these, the outer ring 1 is provided with a cylindrical outer ring raceway 5 at an intermediate portion of the inner peripheral surface, and the pair of inward flanges 6a and 6b at both ends. Further, the inner ring 2 is provided with a cylindrical inner ring raceway 7 at an intermediate portion of the outer peripheral surface and the outward flange portion 8 at one end portion. The plurality of cylindrical rollers 4 and 4 are made of a metal having a self-lubricating property such as a copper alloy, and are held in a freely rolling manner by an annular retainer 9. It is provided between the inner ring raceway 7.

この状態で、上記各円筒ころ４、４の転動面がこれら外輪軌道５及び内輪軌道７に転がり接触する。これに対して、上記各円筒ころ４、４の軸方向両端面の外径寄り部分は、上記各内向鍔部６ａ、６ｂの内側面と、上記外向鍔部８の内側面とに、近接対向若しくは滑り接触する。又、この状態で、上記保持器９の両端部外周面を、上記外輪１の両端部に設けた上記各内向鍔部６ａ、６ｂの内周面に近接対向させる事により、この保持器９の径方向位置をこの外輪１により規制する、外輪案内としている。   In this state, the rolling surfaces of the cylindrical rollers 4 and 4 are in rolling contact with the outer ring raceway 5 and the inner ring raceway 7. On the other hand, the portions closer to the outer diameter of the both end surfaces in the axial direction of the cylindrical rollers 4 and 4 are closely opposed to the inner side surfaces of the inward flange portions 6a and 6b and the inner surface of the outward flange portion 8. Or sliding contact. In this state, the outer peripheral surfaces of both ends of the retainer 9 are brought close to and opposed to the inner peripheral surfaces of the inward flange portions 6a and 6b provided at both end portions of the outer ring 1. The outer ring guide is used to regulate the radial position by the outer ring 1.

上述の様な鍔付きの円筒ころ軸受３は、大きなラジアル荷重を支承できるだけでなく、上記各円筒ころ４、４の軸方向両端面と、上記各内向鍔部６ａ、６ｂのうちの一方（図１２の右方）の内向鍔部６ｂ、並びに、上記外向鍔部８との係合により、アキシアル荷重を支承できる。即ち、図１２で内輪２に右方向のアキシアル荷重が加わった場合に、上記外向鍔部８の内側面と上記各円筒ころ４、４の軸方向他端面（図１２の左端面）外径寄り部分とが摺接すると同時に、上記一方の内向鍔部６ｂの内側面と上記各円筒ころ４、４の軸方向一端面（図１２の右端面）外径寄り部分とが摺接して、上記アキシアル荷重を支承する。   The cylindrical roller bearing 3 with a flange as described above can not only support a large radial load, but also one of the axial end faces of the cylindrical rollers 4 and 4 and the inward flange portions 6a and 6b (see FIG. The axial load can be supported by engagement with the inward flange portion 6b on the right side of 12 and the outward flange portion 8 described above. That is, when a rightward axial load is applied to the inner ring 2 in FIG. 12, the inner surface of the outward flange 8 and the other axial end surface (left end surface in FIG. 12) of the cylindrical rollers 4 and 4 are closer to the outer diameter. At the same time that the portion is in sliding contact, the inner side surface of the one inwardly facing flange portion 6b and the axial one end surface (the right end surface in FIG. 12) of each cylindrical roller 4, 4 are in sliding contact with each other, and the axial Bearing the load.

上述の様な（鍔付の）円筒ころ軸受３を使用する場合、ラジアル方向の剛性を更に向上させると共に回転精度を向上させる為、この円筒ころ軸受３の内部隙間を負にする、所謂予圧を付与する事もある。但し、この様な予圧付与を行なう事は、上記円筒ころ軸受３等を含む各種ころ軸受にとって、総べてのころが軌道輪の軌道面と接触する等、内部の部品摩耗や焼付き等の故障が発生し易い過酷な条件となる。この為に一般の産業機械用のころ軸受では、運転時に軸受内に正の隙間が残る様にして、剥離寿命の延長を図ると共に、外乱により軸受機能が低下するのを抑える事も多い。又、運転時の発熱を最小にする為、工作機械用のころ軸受は、ごく微量のグリースや潤滑油等による潤滑条件下で運転される事が多い。即ち、グリースや潤滑油等の潤滑剤を必要最小限に抑える事により、潤滑剤の撹拌抵抗と、この撹拌抵抗に基づく発熱とを抑えている。   In the case of using the cylindrical roller bearing 3 (with brazing) as described above, in order to further improve the rigidity in the radial direction and improve the rotation accuracy, a so-called pre-load that makes the internal gap of the cylindrical roller bearing 3 negative is used. May be granted. However, such preloading is applied to various roller bearings including the cylindrical roller bearing 3 and the like, such as internal parts wear and seizure, etc. Severe conditions are likely to cause failure. For this reason, in general roller bearings for industrial machines, a positive gap is left in the bearing during operation so as to extend the peeling life and often suppress deterioration of the bearing function due to disturbance. In order to minimize heat generation during operation, roller bearings for machine tools are often operated under lubrication conditions with a very small amount of grease or lubricating oil. That is, by suppressing the lubricant such as grease and lubricating oil to the minimum necessary, the stirring resistance of the lubricant and the heat generation based on the stirring resistance are suppressed.

尚、鉄道車両の車軸を回転自在に支持する転がり軸受としても、上述の様な円筒ころ軸受３が使用されている。この様な車軸を支持するころ軸受の場合も、鉄道車両の高速化に伴い、高回転速度で長時間安定して使用できる様に、高速安定性が求められている。この様な鉄道車両に組み込むころ軸受の場合は、上述の様な工作機械に組み込むころ軸受の様に、内部隙間が負の状態で使用しないものの、中速乃至高速回転で高荷重、振動荷重、衝撃荷重が加わる条件で使用される為、上記ころ軸受の強度及び剛性や低発熱性等の性能は、上述した工作機械に組み込むころ軸受と同様に要求されている。   The cylindrical roller bearing 3 as described above is also used as a rolling bearing that rotatably supports the axle of a railway vehicle. In the case of such a roller bearing that supports an axle, high-speed stability is required so that it can be used stably at a high rotational speed for a long time as the speed of a railway vehicle increases. In the case of a roller bearing incorporated in such a railway vehicle, a roller bearing incorporated in a machine tool such as that described above is not used in a negative state of the internal gap, but it can be driven at a medium to high speed with high load, vibration load, Since the roller bearing is used under a condition where an impact load is applied, the roller bearing is required to have the strength, rigidity, low heat generation performance, and the like in the same manner as the roller bearing incorporated in the machine tool described above.

上述の様な厳しい使用条件下で、ころ軸受により回転自在に支承した工作機械の主軸や鉄道車両の車軸等の回転体の回転速度を更に高める為には、解決しなければならない種々の問題がある。この様な問題の一つとして、従来より上記ころ軸受に標準的に使用されてきた、銅合金製の保持器の摩耗問題がある。即ち、ころ軸受を上述の様な過酷な条件下で使用すると、保持器の内外両周面、或はポケットの内面が、軌道輪の周面やころの表面（転動面及び端面）と強く擦れ合う。この為、軌道輪並びにころを構成する軸受鋼等の硬質金属に比べて軟らかい、銅合金製の保持器が摩耗し、この保持器から摩耗粉が発生し易くなる。特に、ころ軸受の潤滑をグリースで行なっている場合、この摩耗粉がグリース中に混入する（グリースを汚染する）事により、このグリースの潤滑性が低下する。そして、潤滑性が著しく低下した場合には、上記ころ軸受が、短時間で焼き付きや著しい摩耗等の損傷を受ける可能性がある。   In order to further increase the rotational speed of a rotating body such as a main shaft of a machine tool or an axle of a railway vehicle that is rotatably supported by roller bearings under severe use conditions as described above, various problems must be solved. is there. As one of such problems, there is a problem of wear of a copper alloy cage that has been conventionally used for the roller bearing as a standard. In other words, when the roller bearing is used under the severe conditions as described above, both the inner and outer peripheral surfaces of the cage or the inner surface of the pocket are strong against the peripheral surface of the bearing ring and the surface (rolling surface and end surface) of the roller. rub against. For this reason, it is softer than hard metals such as bearing steel and the like constituting the bearing ring and the roller, and the copper alloy cage is worn out, and wear powder is easily generated from the cage. In particular, when the roller bearing is lubricated with grease, the wear powder is mixed in the grease (contaminates the grease), so that the lubricity of the grease decreases. And when lubricity falls remarkably, the said roller bearing may receive damage, such as seizing and remarkable abrasion, in a short time.

この様な事情に鑑みて、近年では、工作機械の主軸や鉄道車両の車軸等、大きな荷重を受ける回転体を回転自在に支持する為のころ軸受に組み込む保持器として、特許文献１等に記載されている様に、合成樹脂製の保持器を使用する場合が多くなりつつある。この様な合成樹脂製の保持器として通常は、ポリアミド樹脂、ポリフェニレンサルファイド樹脂等、優れた摩擦特性を有する（摩耗しにくい）合成樹脂中に、ガラス繊維等の補強材を適量混入した、繊維強化合成樹脂を射出成形する事により造ったものを使用している。この様な合成樹脂製の保持器を組み込んだころ軸受は、前述の様な過酷な使用条件下でも摩耗粉が発生しにくく、焼き付きや著しい摩耗等の損傷を発生しにくくできる。   In view of such circumstances, in recent years, as a cage incorporated in a roller bearing for rotatably supporting a rotating body that receives a large load, such as a main shaft of a machine tool or an axle of a railway vehicle, described in Patent Document 1 and the like. As is done, the use of a cage made of synthetic resin is increasing. Such a synthetic resin cage is usually made of fiber reinforced by mixing an appropriate amount of reinforcing material such as glass fiber in a synthetic resin with excellent friction characteristics (hard to wear) such as polyamide resin and polyphenylene sulfide resin. The one made by injection molding synthetic resin is used. A roller bearing incorporating such a cage made of synthetic resin is less likely to generate wear powder even under the severe use conditions as described above, and can hardly cause damage such as seizure or significant wear.

又、上記特許文献１には、高速運転時にも破損しにくいころ軸受用合成樹脂製保持器の発明が記載されている。この保持器は、円環状の１個のリム部に各柱部の基端部を連続させる事により、これら各柱部を片持ち支持すると共に、各柱部のうちの一部の柱部の先端部同士のみを、連結枠部により円周方向に連結させている。そして、この様に構成する事により、上記保持器の柔軟性を確保し、高速運転時の安定性の向上を図っている。   Patent Document 1 describes an invention of a synthetic resin cage for roller bearings that is not easily damaged during high-speed operation. This retainer cantilever-supports each of the pillar parts by connecting the base end of each pillar part to one annular rim part, and also supports some of the pillar parts of each pillar part. Only the tip portions are connected in the circumferential direction by the connecting frame portion. And by comprising in this way, the softness | flexibility of the said holder | retainer is ensured and the improvement at the time of high-speed driving | operation is aimed at.

前述の様に、円筒ころ軸受の保持器を合成樹脂製とする事で、従来の銅合金製の保持器に比べ耐摩耗性及び耐焼き付き性の向上を図れる。但し、工作機械や鉄道車両の高速化に伴って、微量潤滑下での低発熱性及び耐久性が、更に要求されている。即ち、上述の様な工作機械や鉄道車両に組み込むころ軸受の場合、高速で運転する程このころ軸受を構成する軌道輪の案内面と保持器の被案内面との摺接部で潤滑剤（グリースや潤滑油）が枯渇し易くなる。そして、この摺接部で潤滑剤が枯渇すると、摩耗や振動が増大したり温度上昇し易くなる他、著しい場合には溶着、焼き付き等の損傷が生じる可能性もある。この為、上述の様な微量潤滑下で高速運転した場合でも、摩耗や溶着、焼き付き等の損傷が生じにくく、しかも温度上昇や振動が増大しにくい、優れた耐久性並びに安定性を有するころ軸受が望まれている。   As described above, by making the cage of the cylindrical roller bearing made of synthetic resin, it is possible to improve wear resistance and seizure resistance as compared with a conventional cage made of copper alloy. However, with the increase in the speed of machine tools and railway vehicles, low heat generation and durability under a minute amount of lubrication are further required. That is, in the case of a roller bearing incorporated in a machine tool or a railway vehicle as described above, the lubricant (in the sliding contact portion between the guide surface of the bearing ring and the guided surface of the cage constituting the roller bearing as the roller is operated at a higher speed. (Grease and lubricating oil) are easily depleted. When the lubricant is depleted at the sliding contact portion, wear and vibration increase or the temperature easily rises. In addition, in a remarkable case, damage such as welding and seizure may occur. For this reason, roller bearings with excellent durability and stability that do not easily cause damage such as wear, welding, and seizure even when operated at a high speed under the above-mentioned minute lubrication, and that are less likely to increase in temperature and vibration. Is desired.

特開平１１−１６６５４４号公報JP 11-166544 A

本発明は、上述の様な事情に鑑みて、高速運転、微量潤滑等の厳しい使用条件の下でも、優れた耐久性並びに安定性を有するころ軸受用合成樹脂製保持器及びころ軸受を実現すべく発明したものである。   In view of the circumstances as described above, the present invention realizes a synthetic resin cage and roller bearing for roller bearings having excellent durability and stability even under severe use conditions such as high-speed operation and minute lubrication. Invented accordingly.

本発明のころ軸受用合成樹脂製保持器及びころ軸受のうちのころ軸受用合成樹脂製保持器は、内周面に外輪軌道を有する外輪と、外周面に内輪軌道を有する内輪と、外周面を上記外輪軌道及び内輪軌道に接触する転動面とした複数のころとを備えたころ軸受に組み込んだ状態で、これら各ころを転動自在に保持する。
この為、合成樹脂を射出成形する事により一体に形成して成り、軸方向に互いに間隔をあけて配置した１対のリム部と、円周方向に亙って間欠的に配置され、それぞれの両端部を上記各リム部の互いに対向する内側面に連続させた複数本の柱部とを備える。
そして、円周方向に隣り合う上記各柱部の円周方向両側面と上記各リム部の互いに対向する内側面とにより四周を囲まれる矩形の空間部分を、上記各ころを転動自在に保持する為のポケットとしている。又、これと共に、上記各リム部の外周面と内周面とのうちの一方の周面である被案内面を、上記外輪の内周面と上記内輪の外周面とのうちの一方の周面である案内面に近接対向させる事により、径方向に関する位置決めを図られる。
特に、本発明のころ軸受用合成樹脂製保持器に於いては、円周方向に関して上記被案内面の一部に、この被案内面の他の部分よりも径方向に凹んだ凹部を設けている。
又、本発明のころ軸受は、内周面に外輪軌道を有する外輪と、外周面に内輪軌道を有する内輪と、外周面を上記外輪軌道及び内輪軌道に接触する転動面とした複数のころと、これら各ころを転動自在に保持する保持器とを備える。
特に、本発明のころ軸受に於いては、上記保持器が、上述の様なころ軸受用合成樹脂製保持器である。 The synthetic resin cage for roller bearings of the present invention and the synthetic resin cage for roller bearings of the roller bearings include an outer ring having an outer ring raceway on an inner peripheral surface, an inner ring having an inner ring raceway on an outer peripheral surface, and an outer peripheral surface. In a state where the roller is incorporated in a roller bearing provided with a plurality of rollers having rolling surfaces in contact with the outer ring raceway and the inner ring raceway, each of these rollers is rotatably held.
For this reason, synthetic resin is integrally formed by injection molding, and a pair of rim portions arranged at intervals in the axial direction, and intermittently arranged in the circumferential direction. And a plurality of column portions having both end portions connected to the mutually opposing inner side surfaces of the rim portions.
And the rectangular space part surrounded by four circumferences by the circumferential direction both side surfaces of each said column part adjacent to the circumferential direction and the mutually opposing inner side surface of each said rim part hold | maintains each said roller so that rolling is possible. It is a pocket to do. At the same time, a guided surface which is one of the outer peripheral surface and the inner peripheral surface of each of the rim portions is set to be a circumference of one of the inner peripheral surface of the outer ring and the outer peripheral surface of the inner ring. Positioning in the radial direction can be achieved by making the guide surface close to and opposite to the surface.
In particular, in the synthetic resin cage for roller bearings of the present invention, a concave portion that is recessed in a radial direction from the other portion of the guided surface is provided in a part of the guided surface in the circumferential direction. Yes.
The roller bearing of the present invention includes a plurality of rollers having an outer ring having an outer ring raceway on an inner peripheral surface, an inner ring having an inner ring raceway on an outer peripheral surface, and a rolling surface whose outer peripheral surface is in contact with the outer ring raceway and the inner ring raceway. And a cage for holding these rollers in a rollable manner.
In particular, in the roller bearing of the present invention, the cage is a synthetic resin cage for a roller bearing as described above.

上述の様に構成する本発明のころ軸受用合成樹脂製保持器及びころ軸受によれば、高速運転、微量潤滑等の厳しい使用条件の下でも、耐久性並びに安定性を確保できる。即ち、上記保持器の被案内面に設けた凹部に溜まった潤滑剤（グリースや潤滑油、グリースと潤滑油の混合物等）が、上記ころ軸受を構成する軌道輪の案内面と上記被案内面との摺接部に取り込まれる。この為、この摺接部で潤滑剤が枯渇する事を防止でき、この潤滑剤の枯渇に基づく摩耗や振動、温度上昇、溶着、焼き付き等を防止できる。   According to the synthetic resin cage and roller bearing of the present invention configured as described above, durability and stability can be ensured even under severe use conditions such as high speed operation and minute lubrication. That is, the lubricant (grease, lubricating oil, a mixture of grease and lubricating oil, etc.) accumulated in the recessed portion provided on the guided surface of the cage causes the guide surface of the bearing ring constituting the roller bearing and the guided surface. It is taken into the sliding contact part. For this reason, it is possible to prevent the lubricant from being depleted at the sliding contact portion, and it is possible to prevent wear, vibration, temperature rise, welding, seizure, and the like due to the depletion of the lubricant.

本発明の合成樹脂製保持器及びころ軸受を実施する場合に好ましくは、請求項２に記載した様に、各リム部の被案内面にこの被案内面から突出する状態で、（仮想の）中心軸に直交する仮想平面に関する断面を円弧形とした複数の凸部を設け、これら各凸部同士の間部分を凹部とする。
或は、請求項３に記載した様に、各リム部の被案内面にこの被案内面から凹入する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした複数の凹溝を設け、これら各凹溝を凹部とする。
又、請求項４に記載した様に、各リム部の被案内面のうちで各柱部と整合する部分から外れた部分（より好ましくは、円周方向に隣り合う柱部同士の中央部、即ち各ポケットの円周方向中央部に整合する部分）に、凸部若しくは凹溝を設ける。
或は、請求項５に記載した様に、各リム部の被案内面のうちで各柱部と整合する部分並びにこれら各柱部の周面に、凸部若しくは凹溝を設ける。
又、請求項６に記載した様に、各柱部のうちの径方向に関して被案内面と反対側となる部分を各リム部の周面よりも径方向に突出させ、この突出させた部分に、射出成形の際に合成樹脂を送り込む為のゲートを配置する。
又、請求項７に記載した様に、ころ軸受を構成する各ころを、各ポケットの内径側開口縁側を通過不能に保持自在とする。
更には、請求項８に記載した様に、各リム部の軸方向外側面に、この外側面から軸方向内側に凹入する第二の凹部を設ける。 In the case of carrying out the synthetic resin cage and roller bearing of the present invention, preferably, as described in claim 2, in a state of protruding from the guided surface to the guided surface of each rim portion (virtual) A plurality of convex portions having an arc-shaped cross section with respect to a virtual plane orthogonal to the central axis are provided, and a portion between these convex portions is defined as a concave portion.
Alternatively, as described in claim 3, a plurality of concave grooves each having an arcuate cross section with respect to a virtual plane orthogonal to the central axis in a state where the guided surface of each rim portion is recessed from the guided surface. These concave grooves are defined as concave parts.
In addition, as described in claim 4, a portion of the guided surface of each rim portion that is out of a portion aligned with each column portion (more preferably, a central portion between column portions adjacent in the circumferential direction, That is, a convex portion or a concave groove is provided in a portion that is aligned with the circumferential central portion of each pocket.
Alternatively, as described in claim 5, a convex portion or a concave groove is provided on a portion of the guided surface of each rim portion that is aligned with each column portion and on the peripheral surface of each column portion.
Further, as described in claim 6, a portion of each column portion that is opposite to the guided surface with respect to the radial direction is protruded in a radial direction from the peripheral surface of each rim portion, and the protruding portion is A gate for feeding synthetic resin during injection molding is arranged.
In addition, as described in claim 7, each roller constituting the roller bearing can be held so as not to pass through the inner diameter side opening edge side of each pocket.
Furthermore, as described in claim 8, a second recess is provided on the outer surface in the axial direction of each rim portion so as to be recessed inward in the axial direction from the outer surface.

図１〜３は、請求項１、２、４、６、７、８、９に対応する、本発明の実施例１を示している。本例の合成樹脂製保持器１０は、図３に示す様に、鍔付の円筒ころ軸受３ａに組み込んだ状態で、この円筒ころ軸受３ａを構成する各円筒ころ４、４を転動自在に保持する。尚、この円筒ころ軸受３ａの基本構成は、上記合成樹脂製保持器１０の構造を除き、前述の図１２〜１３に示した鍔付の円筒ころ軸受３と同様である為、同等部分には同一符号を付して重複する説明を省略する。   1 to 3 show a first embodiment of the present invention corresponding to claims 1, 2, 4, 6, 7, 8, and 9. FIG. As shown in FIG. 3, the synthetic resin cage 10 of the present example enables rolling of the cylindrical rollers 4, 4 constituting the cylindrical roller bearing 3 a while being incorporated in a cylindrical roller bearing 3 a with a flange. Hold. The basic structure of the cylindrical roller bearing 3a is the same as that of the cylindrical roller bearing 3 with a flange shown in FIGS. 12 to 13 except for the structure of the synthetic resin cage 10 described above. The same reference numerals are assigned and duplicate descriptions are omitted.

上記合成樹脂製保持器１０は、ポリアミド６、ポリアミド６６、ポリアミド４６、ポリフェニレンサルファイド、ポリエーテル・エーテルケトン等の熱可塑性合成樹脂を母材とし、強度向上及び寸法安定化の為にガラス繊維を１０〜４０重量％程度添加したものを、射出成形により一体成形して成る。但し、用途により、上記合成樹脂製保持器１０に更なる強度向上と耐摩耗性を要求する場合には、カーボン繊維を１５〜３０％添加しても良い。   The synthetic resin cage 10 is made of a thermoplastic synthetic resin such as polyamide 6, polyamide 66, polyamide 46, polyphenylene sulfide, polyether ether ketone, etc., and glass fiber 10 is used for strength improvement and dimensional stabilization. What is added by about 40% by weight is integrally formed by injection molding. However, depending on the application, when further improvement in strength and wear resistance are required for the synthetic resin cage 10, carbon fiber may be added in an amount of 15 to 30%.

この様な合成樹脂により造られた本例の合成樹脂製保持器１０は、軸方向に互いに間隔をあけて配置した１対のリム部１１、１１と、円周方向に亙って間欠的に配置され、それぞれの両端部を上記各リム部１１、１１の互いに対向する内側面に連続させた複数本の柱部１２、１２とを備える。そして、円周方向に隣り合うこれら各柱部１２、１２の円周方向両側面と上記各リム部１１、１１の互いに対向する内側面とにより四周を囲まれる矩形の空間部分を、上記各円筒ころ４、４を転動自在に保持する為のポケット１３、１３としている。又、これと共に、上記合成樹脂製保持器１０の外周面のうち軸方向両端部外周面、即ち、上記各リム部１１、１１の外周面を、上記円筒ころ軸受３ａを構成する内向鍔部６ａ、６ｂの内周面（案内面）に近接対向させる事により、上記合成樹脂製保持器１０の直径方向位置決めを行なう被案内面としている。   The synthetic resin cage 10 of this example made of such a synthetic resin includes a pair of rim portions 11 and 11 arranged at intervals in the axial direction, and intermittently over the circumferential direction. And a plurality of column portions 12 and 12 which are arranged and are connected to the inner surfaces of the rim portions 11 and 11 facing each other. A rectangular space portion surrounded by four sides by the circumferential side surfaces of the column parts 12 and 12 adjacent to each other in the circumferential direction and the inner surfaces of the rim parts 11 and 11 facing each other is defined as the cylinders. Pockets 13 and 13 are provided for holding the rollers 4 and 4 so as to roll freely. At the same time, the outer circumferential surface of both ends in the axial direction of the outer circumferential surface of the synthetic resin cage 10, that is, the outer circumferential surface of each of the rim portions 11, 11 is used as the inward flange portion 6 a constituting the cylindrical roller bearing 3 a. , 6b is used as a guided surface for positioning in the diametrical direction of the synthetic resin retainer 10 by facing the inner peripheral surface (guide surface) of 6b.

更に、本例の合成樹脂製保持器１０の場合、上記各リム部１１、１１の外周面（被案内面）に、この外周面から突出する状態で、軸方向に直交する仮想平面に関する断面を円弧形とした、凸部１４、１４を設けている。本例の場合、これら各凸部１４、１４同士の間部分、即ち、これら各凸部１４、１４同士の間に存在する円筒面部分を、上記被案内面に設けたこの被案内面の他の部分よりも径方向に凹んだ、特許請求の範囲に記載した凹部としている。そして、上記円筒ころ軸受３ａに上記合成樹脂製保持器１０を組み込んだ状態で、上記各凸部１４、１４の頂部は、上記内向鍔部６ａ、６ｂの内周面に近接する。これら各凸部１４、１４は、上記各リム部１１、１１にそれぞれ３乃至上記各ポケット１３、１３と同数ずつ、軸方向に関して互いに整合する状態で設ける事が好ましい。   Further, in the case of the synthetic resin cage 10 of the present example, a cross section relating to a virtual plane orthogonal to the axial direction is projected on the outer peripheral surface (guided surface) of each of the rim portions 11 and 11 from the outer peripheral surface. The convex parts 14 and 14 made into circular arc shape are provided. In the case of this example, the portion between these convex portions 14 and 14, that is, the cylindrical surface portion existing between these convex portions 14 and 14, other than the guided surface provided on the guided surface. It is set as the recessed part described in the claim which was dented in radial direction rather than this part. And the top part of each said convex part 14 and 14 adjoins to the internal peripheral surface of the said inward flange part 6a, 6b in the state which incorporated the said synthetic resin cage 10 in the said cylindrical roller bearing 3a. Each of the convex portions 14 and 14 is preferably provided in the rim portions 11 and 11 so as to be aligned with each other in the axial direction by the same number as 3 to the pockets 13 and 13, respectively.

本例の場合、上記各凸部１４、１４を、上記各ポケット１３、１３と同数設けている。即ち、これら各凸部１４、１４を、上記リム部１１、１１の外周面のうちで上記各柱部１２、１２と整合する部分から外れた部分、より具体的には円周方向に隣り合う柱部１２、１２同士の中央部（ポケット１３、１３の円周方向中央部に整合する部分）に、それぞれ設けている。又、上記各凸部１４、１４の曲率半径Ｒは、上記合成樹脂製保持器１０の外径をＤとした場合に、Ｄ／２０≦Ｒ≦Ｄ／４（より好ましくはＤ／１４≦Ｒ≦Ｄ／８）としている。但し、この様に各凸部１４、１４の曲率半径Ｒを規制する場合でも、上記各凸部１４、１４の上記被案内面からの突出量ｔ（凸部１４の頂部とこの凸部１４から外れた円筒面部分との径方向距離ｔ）は、０．５mm≦ｔ≦１．５mm（より好ましくは０．８mm≦ｔ≦１．２mm）とする事が好ましい。   In the case of this example, the same number of the convex portions 14 and 14 as the pockets 13 and 13 are provided. That is, these convex portions 14 and 14 are adjacent to each other in the outer circumferential surface of the rim portions 11 and 11, and more specifically in the circumferential direction, which are out of the portion that aligns with the column portions 12 and 12. It is provided in the central part of the column parts 12, 12 (part aligned with the central part in the circumferential direction of the pockets 13, 13). The curvature radius R of each of the convex portions 14 and 14 is D / 20 ≦ R ≦ D / 4 (more preferably D / 14 ≦ R, where D is the outer diameter of the synthetic resin cage 10. ≦ D / 8). However, even when the curvature radius R of each convex part 14, 14 is regulated in this way, the protruding amount t of each convex part 14, 14 from the guided surface (from the top part of the convex part 14 and this convex part 14 The radial distance t) from the removed cylindrical surface portion is preferably 0.5 mm ≦ t ≦ 1.5 mm (more preferably 0.8 mm ≦ t ≦ 1.2 mm).

尚、上記凸部１４、１４の曲率半径ＲがＤ／２０未満の場合、或は、上記各凸部１４、１４の上記被案内面からの突出量ｔが０．５mm未満の場合には、上記被案内面のうちのこれら各凸部１４、１４から外れた円筒面部分に潤滑剤（グリースや潤滑油、グリースと潤滑油の混合物等）を十分に溜める事ができなくなり、上記被案内面と案内面との摺接部で潤滑剤が枯渇し易くなる可能性がある。一方、上記凸部１４、１４の曲率半径ＲがＤ／４を超える場合、或は、上記各凸部１４、１４の上記被案内面からの突出量ｔが１．５mmを超える場合には、これら各凸部１４、１４の摩耗が著しくなり、上記被案内面と案内面との摺接状態を良好に保てなくなる可能性がある。   When the radius of curvature R of the convex portions 14 and 14 is less than D / 20, or when the protruding amount t of the convex portions 14 and 14 from the guided surface is less than 0.5 mm, A lubricant (grease, lubricating oil, mixture of grease and lubricating oil, etc.) cannot be sufficiently accumulated in the cylindrical surface portion of the guided surface that is out of the convex portions 14, 14, and the guided surface There is a possibility that the lubricant is easily depleted at the sliding contact portion between the guide surface and the guide surface. On the other hand, when the curvature radius R of the convex portions 14 and 14 exceeds D / 4, or when the protruding amount t of the convex portions 14 and 14 from the guided surface exceeds 1.5 mm, There is a possibility that the wear of each of the convex portions 14 and 14 becomes significant, and the sliding contact state between the guided surface and the guiding surface cannot be maintained well.

又、上記各柱部１２、１２のうちの径方向に関して被案内面と反対側となる部分、即ちこれら各柱部１２、１２の内径側端部を、上記各リム部１１、１１の周面よりも径方向に突出させ、この突出させた部分に、射出成形の際に合成樹脂を送り込む為のゲートを配置している。この様に各柱部１２、１２の内径側端部にゲートを配置する事で、このゲートの数を多くすれば、射出成形の際に金型のキャビティ内に合成樹脂を均一に流し込み易くでき、上記合成樹脂製保持器１０の成形精度の向上を図れる。しかも、本例の場合は、上記被案内面に設けた凸部１４、１４の頂部が前記案内面に摺接する為、これら各凸部１４、１４の外接円の真円度を確保する事で、上記被案内面と案内面との摺接状態を良好に保てる。   Further, a portion of each of the column portions 12 and 12 that is opposite to the guided surface in the radial direction, that is, an inner diameter side end of each of the column portions 12 and 12 is a peripheral surface of each of the rim portions 11 and 11. Further, a gate for feeding a synthetic resin at the time of injection molding is arranged in the protruding portion more in the radial direction. Thus, by arranging the gates at the inner diameter side ends of the pillars 12 and 12, if the number of the gates is increased, the synthetic resin can be easily poured into the mold cavity at the time of injection molding. The molding accuracy of the synthetic resin cage 10 can be improved. In addition, in the case of this example, since the tops of the convex portions 14 and 14 provided on the guided surface are in sliding contact with the guide surface, the roundness of the circumscribed circle of the convex portions 14 and 14 is ensured. The sliding contact state between the guided surface and the guide surface can be maintained well.

即ち、射出成形により造られる合成樹脂製保持器の場合、寸法が大きくなる程この保持器の形状精度を確保しにくくなる。言い換えれば、この合成樹脂製保持器が大型になる程、射出成形の際に金型のキャビティ内で合成樹脂が均一に固化しにくくなる等、上記保持器の被案内面の真円度を十分に確保しにくくなる（真円度を高度に維持できなくなる）可能性がある。そして、この様な真円度が十分でない合成樹脂製保持器を組み込んだ円筒ころ軸受等のころ軸受を高速運転すると、このころ軸受を構成する軌道輪の案内面と上記保持器の被案内面とが安定して摺接せずに（案内面と被案内面との摺接状態を良好に保てずに）、摩耗や振動、温度上昇の増大が避けられなくなる可能性がある。   That is, in the case of a synthetic resin cage made by injection molding, it becomes difficult to ensure the shape accuracy of the cage as the size increases. In other words, the larger the synthetic resin cage is, the more difficult it is to solidify the synthetic resin uniformly in the cavity of the mold during injection molding. May be difficult to secure (cannot maintain a high degree of roundness). When a roller bearing such as a cylindrical roller bearing incorporating such a synthetic resin cage having insufficient roundness is operated at a high speed, the guide surface of the bearing ring and the guided surface of the cage constituting the roller bearing Are not stably slidably contacted (the slidably contacted state between the guide surface and the guided surface is not maintained well), and there is a possibility that an increase in wear, vibration, and temperature increase cannot be avoided.

これに対して本例の合成樹脂製保持器１０の場合には、上記被案内面に設けた凸部１４、１４の頂部が前記案内面に摺接する為、これら各凸部１４、１４の外接円の真円度を確保する事で、上記被案内面と案内面との摺接状態を良好に保てる。これら各凸部１４、１４の外接円の真円度は、金型の調整等の容易な作業で確保できる為、上記ゲートの数を多くする事と相まって、上記被案内面と案内面とを安定して摺接させる事ができる。   On the other hand, in the case of the synthetic resin cage 10 of this example, since the tops of the convex portions 14 and 14 provided on the guided surface are in sliding contact with the guide surface, the circumscribing of these convex portions 14 and 14 is performed. By ensuring the roundness of the circle, the sliding contact state between the guided surface and the guiding surface can be maintained well. Since the roundness of the circumscribed circle of each of the convex portions 14 and 14 can be ensured by an easy operation such as adjustment of a mold, the guide surface and the guide surface are coupled with an increase in the number of gates. Stable contact can be achieved.

又、本例の場合、上記各リム部１１、１１の軸方向外側面に、この外側面から軸方向内側に凹入する状態で凹部１５、１５を設けている。これら各凹部１５、１５は、特許請求の範囲に記載した第二の凹部に相当するもので、上記合成樹脂製保持器１０の軽量化を図ると同時に、冷却時に生じる、引けと呼ばれる変形を抑えると共に、射出成形時にボイド（金型のキャビティ内で合成樹脂が行き渡らない事により生じる空隙）を生じにくくする為のものである。即ち、上記凹部１５、１５を上記各リム部１１、１１の側面に１乃至複数設ける事で、上記各リム部１１、１１の体積の低減を図れる。そして、この様に各リム部１１、１１の体積を小さくする事で、上記合成樹脂製保持器１０の軽量化を図ると同時に冷却に伴う変形を抑えると共に、射出成形時に合成樹脂を金型のキャビティ内に行き渡り易くして、上記ボイドが生じるのを防止している。   In the case of this example, the recesses 15 and 15 are provided on the axially outer side surfaces of the rim portions 11 and 11 so as to be recessed inward in the axial direction from the outer surface. Each of these recesses 15, 15 corresponds to a second recess described in the claims, and at the same time as reducing the weight of the synthetic resin retainer 10, suppresses deformation called shrinkage that occurs during cooling. At the same time, it is intended to make it difficult for voids (voids caused by the fact that synthetic resin does not spread in the mold cavity) to occur during injection molding. That is, by providing one or more of the concave portions 15 and 15 on the side surfaces of the rim portions 11 and 11, the volume of the rim portions 11 and 11 can be reduced. And by reducing the volume of each rim | limb part 11 and 11 in this way, while aiming at the weight reduction of the said synthetic resin holder 10, while suppressing the deformation | transformation accompanying cooling, synthetic resin is used for a metal mold | die at the time of injection molding. The voids are prevented from occurring by facilitating the distribution into the cavity.

又、本例の場合、前記各ポケット１３、１３の開口縁のうちで、上記各リム部１１、１１の径方向に関して前記被案内面と反対側（内径側）の開口縁の一部（軸方向中間部）の、円周方向に関する距離ｗ（図１〜２）を、前記各円筒ころ４、４の外径ｄ（図１）よりも小さく（ｗ＜ｄ）している。即ち、本例の場合には、上記各ポケット１３、１３の内面のうちの内径側半部の円周方向に関する距離ｗを、径方向内方に向かうに従って漸減させている。言い換えれば、これら各ポケット１３、１３の内面の内径側半部を、内径側に向かう程狭くなる様に傾斜（並びに湾曲）させている。この様な構成により、上記各ポケット１３、１３に上記各円筒ころ４、４を、前記合成樹脂製保持器１０の径方向外方からのみ挿入自在とし、且つ、上記内径側の各開口縁を通過不能に保持自在としている。   In the case of this example, of the opening edges of the pockets 13 and 13, a part of the opening edge on the side opposite to the guided surface (inner diameter side) with respect to the radial direction of the rim parts 11 and 11 (axis The distance w (FIGS. 1 and 2) in the circumferential direction of the middle portion in the direction is smaller than the outer diameter d (FIG. 1) of each of the cylindrical rollers 4 and 4 (w <d). In other words, in the case of this example, the distance w in the circumferential direction of the inner diameter side half of the inner surfaces of the pockets 13 and 13 is gradually reduced toward the inner side in the radial direction. In other words, the inner diameter side halves of the inner surfaces of these pockets 13 and 13 are inclined (and curved) so as to become narrower toward the inner diameter side. With such a configuration, the cylindrical rollers 4 and 4 can be inserted into the pockets 13 and 13 only from the outside in the radial direction of the synthetic resin retainer 10, and the opening edges on the inner diameter side are formed. It can be held freely so that it cannot pass.

上述の様に構成する本例の合成樹脂製保持器１０及び円筒ころ軸受３ａによれば、高速運転、微量潤滑等の厳しい使用条件の下でも、耐久性並びに安定性を確保できる。即ち、上述の様に合成樹脂製保持器１０の被案内面に凸部１４、１４を設ける為、これら各凸部１４、１４の頂部が上記円筒ころ軸受３ａを構成する内向鍔部６ａ、６ｂの内周面（案内面）に摺接する。この為、これら案内面と被案内面との摺接面積の低減を図れ、振動や温度上昇の低減を図れる。又、これと共に、上記被案内面のうちの上記各凸部１４、１４から外れた部分に溜まった潤滑剤（グリースや潤滑油、グリースと潤滑油の混合物等）が、これら各凸部１４、１４の頂部と上記案内面との摺接部に効率良く取り込まれる。この為、この摺接部で潤滑剤が枯渇する事を防止でき、この潤滑剤の枯渇に基づく摩耗や振動、温度上昇、溶着、焼き付き等を防止できる。しかも、上述した様に、上記被案内面に設けた上記各凸部１４、１４の外接円の真円度を確保する事で、上記被案内面と案内面との摺接状態を良好に保てる。上記各凸部１４、１４の外接円又は内接円の真円度は、金型の調整等の容易な作業で確保できる為、上記合成樹脂製保持器１０の寸法が大きい場合や外輪案内の様に被案内面がこの合成樹脂製保持器１０の外径側に位置する場合でも、上記被案内面と案内面とを安定して摺接させる事ができ、摩耗や振動、温度上昇の低減を図れる。   According to the synthetic resin cage 10 and the cylindrical roller bearing 3a of the present example configured as described above, durability and stability can be ensured even under severe use conditions such as high speed operation and minute lubrication. That is, in order to provide the convex portions 14 and 14 on the guided surface of the synthetic resin cage 10 as described above, the top portions of the convex portions 14 and 14 are the inward flange portions 6a and 6b constituting the cylindrical roller bearing 3a. In sliding contact with the inner peripheral surface (guide surface). For this reason, the sliding contact area between the guide surface and the guided surface can be reduced, and vibration and temperature rise can be reduced. At the same time, a lubricant (grease, lubricating oil, mixture of grease and lubricating oil, etc.) accumulated in a portion of the guided surface that is out of the convex portions 14, 14 is transferred to the convex portions 14, 14. 14 is efficiently taken into the sliding contact portion between the top of 14 and the guide surface. For this reason, it is possible to prevent the lubricant from being depleted at the sliding contact portion, and it is possible to prevent wear, vibration, temperature rise, welding, seizure, and the like due to the depletion of the lubricant. In addition, as described above, by ensuring the roundness of the circumscribed circle of the projections 14 and 14 provided on the guided surface, the sliding contact state between the guided surface and the guiding surface can be maintained well. . The roundness of the circumscribed circle or the inscribed circle of each of the convex portions 14 and 14 can be ensured by an easy operation such as adjustment of a mold. Therefore, when the dimension of the synthetic resin cage 10 is large or the outer ring guide In this way, even when the guided surface is positioned on the outer diameter side of the synthetic resin cage 10, the guided surface and the guiding surface can be stably brought into sliding contact, and wear, vibration, and temperature increase can be reduced. Can be planned.

次に、本発明の効果を確認する為に行なった実験に就いて説明する。この実験は、上述の図１〜３に示した被案内面に凸部１４、１４を設けた、本発明に属する合成樹脂製保持器１０（実施例１〜９）と、被案内面を単一円筒面とした（凸部を設けていない）、本発明に属さない保持器（比較例１〜３）とに就いて、それぞれの真円度を測定した。又、これと共に、本発明に属する合成樹脂製保持器１０（実施例１、２、４、６、７、８）と、本発明に属さない保持器（比較例１、４）を、前述した円筒ころ軸受３、３ａ（図３、１２〜１３）に組み込んで、運転時の温度上昇量並びに被案内面の摩耗量をそれぞれ測定した。   Next, an experiment conducted for confirming the effect of the present invention will be described. In this experiment, a synthetic resin cage 10 (Examples 1 to 9) belonging to the present invention in which convex portions 14 and 14 are provided on the guided surface shown in FIGS. The roundness of each was measured with respect to a cage (Comparative Examples 1 to 3) that did not belong to the present invention, which had one cylindrical surface (no protrusions). Along with this, the synthetic resin cage 10 (Examples 1, 2, 4, 6, 7, 8) belonging to the present invention and the cage not belonging to the present invention (Comparative Examples 1, 4) are described above. Incorporated into cylindrical roller bearings 3 and 3a (FIGS. 3 and 12 to 13), the amount of temperature rise during operation and the amount of wear on the guided surface were measured.

尚、上記各保持器を構成する合成樹脂は、ＢＡＳＦジャパン株式会社製のウルトラミッドＡ３ＨＧ５（ポリアミド６６）、ＤＪＥＰ株式会社製のＴＷ２４１Ｆ６（ポリアミド４６）、呉羽化学工業株式会社製のＫＰＳ（ポリフェニレンサルファイド、ガラス繊維２０％含有）とした。そして、これら各合成樹脂を、インラインスクリュー式の射出成形機で成形し、それぞれの真円度を測定した。尚、保持器の寸法は、内径１６０mm、外径２００mm、幅７３mmとし、真円度は東京精密株式会社製の「ＲＯＮＤ ＣＯＭＩＤ７２」（製品名）で測定した。又、本発明に属する合成樹脂製保持器３ａ（実施例１〜９）の真円度は、被案内面に設けた各凸部１４、１４の頂点を結ぶ仮想円（外接円）の真円度として測定した。結果を下記の表１に示す。   In addition, the synthetic resin which comprises each said holder | retainer is Ultramid A3HG5 (polyamide 66) by BASF Japan, TW241F6 (polyamide 46) by DJEP, KPS (polyphenylene sulfide, made by Kureha Chemical Co., Ltd.) Glass fiber 20%). Each of these synthetic resins was molded with an in-line screw type injection molding machine, and the roundness of each was measured. The dimensions of the cage were an inner diameter of 160 mm, an outer diameter of 200 mm, and a width of 73 mm, and the roundness was measured with “ROND COMID 72” (product name) manufactured by Tokyo Seimitsu Co., Ltd. Further, the roundness of the synthetic resin cage 3a (Examples 1 to 9) belonging to the present invention is the roundness of a virtual circle (circumscribed circle) connecting the vertices of the convex portions 14 and 14 provided on the guided surface. Measured as degrees. The results are shown in Table 1 below.

Figure 2005061483
この表１から明らかな様に、被案内面を単一円筒面とした本発明に属さない保持器（比較例１〜３）の真円度が２００μｍ以上となるのに対して、被案内面に凸部１４、１４を設けた本発明に属する合成樹脂製保持器３ａ（実施例１〜９）の真円度は４４μｍ以下と、良好な結果を得られる事が分る。
Figure 2005061483
 As apparent from Table 1, the roundness of the cage (Comparative Examples 1 to 3) not belonging to the present invention in which the guided surface is a single cylindrical surface is 200 μm or more, while the guided surface is It can be seen that the roundness of the synthetic resin cage 3a (Examples 1 to 9) belonging to the present invention in which the convex portions 14 and 14 are provided is 44 μm or less, and good results can be obtained.

又、上記表１に示した各保持器のうちの実施例１、２、４、６、７、８及び比較例１、並びに前述の図１２〜１３に示した黄銅（ＨＢS Ｃｌ）製の保持器（比較例４）を、前述した円筒ころ軸受３、３ａに組み込んで、運転時の温度上昇量並びに被案内面の摩耗量をそれぞれ測定した。この円筒ころ軸受３、３ａの諸元は、内径１３０mm、外径２５０mm、幅８０mm、円筒ころの外径３２mm、ころ数１４個とした。又、上記各保持器の寸法は、内径１６０mm、外径２００mm、幅７３mmとした。そして、ラジアル荷重（１２０ｋＮ）を付与しつつ、回転速度１〜１３００min-1 で運転した。尚、潤滑剤はリチウム石鹸グリースを使用すると共に、雰囲気温度は室温とした。結果を下記の表２に示す。 Moreover, Examples 1, 2, 4, 6, 7, 8 and Comparative Example 1 among the respective cages shown in Table 1 and the brass (HB S Cl) shown in FIGS. A cage (Comparative Example 4) was incorporated into the cylindrical roller bearings 3 and 3a described above, and the temperature rise during operation and the wear amount of the guided surface were measured. The specifications of the cylindrical roller bearings 3 and 3a were an inner diameter of 130 mm, an outer diameter of 250 mm, a width of 80 mm, a cylindrical roller outer diameter of 32 mm, and 14 rollers. The dimensions of the cages were an inner diameter of 160 mm, an outer diameter of 200 mm, and a width of 73 mm. And it was operated at a rotational speed of 1 to 1300 min −1 while applying a radial load (120 kN). The lubricant used was lithium soap grease and the ambient temperature was room temperature. The results are shown in Table 2 below.

Figure 2005061483
Figure 2005061483

尚、この表２に示す温度上昇量は、回転速度１１８０min-1 （鉄道車輌で速度約２００km/h相当）時の温度上昇量である。尚、図４に、回転速度毎の温度上昇量を示す。又、上記表２の摩耗量のうち、被案内面に凸部１４、１４を設けた、本発明に属する合成樹脂製保持器１０（実施例１、２、４、６、７、８）の摩耗量は、この凸部１４の突出量ｔ（凸部１４の頂部とこの凸部１４から外れた円筒面部分との径方向距離ｔ）の運転前と後との差を測定する事により求めた。又、被案内面を単一円筒面とした本発明に属さない保持器（比較例１、４）の摩耗量は、被案内面のうちの摩耗していな部分と摩耗した部分との差を測定する事により求めた。 The temperature increase shown in Table 2 is the temperature increase at a rotational speed of 1180 min −1 (equivalent to a speed of about 200 km / h for a railway vehicle). FIG. 4 shows the temperature rise amount for each rotation speed. In addition, among the wear amounts in Table 2 above, the synthetic resin cage 10 (Examples 1, 2, 4, 6, 7, and 8) belonging to the present invention in which the convex portions 14 and 14 are provided on the guided surface. The amount of wear is determined by measuring the difference between the amount of protrusion t of the protrusion 14 (the radial distance t between the top of the protrusion 14 and the cylindrical surface portion deviated from the protrusion 14) before and after operation. It was. In addition, the wear amount of the cage (Comparative Examples 1 and 4) that does not belong to the present invention in which the guided surface is a single cylindrical surface is the difference between the worn portion and the worn portion of the guided surface. Obtained by measuring.

又、上記各実施例のうちの実施例６及び実施例８は、被案内面に設けた凸部１４、１４の曲率半径Ｒ及び突出量ｔが、前述した好ましい値の範囲（Ｄ／２０≦Ｒ≦Ｄ／４、０．５mm≦ｔ≦１．５mm）からは外れている。上記表２及び図４から明らかな様に、上記各凸部１４、１４の曲率半径ＲをＤ／２０≦Ｒ≦Ｄ／４とし、同じく突出量ｔを０．５mm≦ｔ≦１．５mmとすれば、運転時の温度上昇量、摩耗量の低減を図れる。   In addition, in Examples 6 and 8 among the above-described Examples, the curvature radius R and the protrusion amount t of the convex portions 14 and 14 provided on the guided surface are within the above-described preferable value range (D / 20 ≦ R ≦ D / 4, 0.5 mm ≦ t ≦ 1.5 mm). As apparent from Table 2 and FIG. 4, the curvature radius R of each of the convex portions 14 and 14 is D / 20 ≦ R ≦ D / 4, and the protrusion amount t is 0.5 mm ≦ t ≦ 1.5 mm. By doing so, it is possible to reduce the amount of temperature rise and wear during operation.

次に、図５は、請求項１、３、４、６、７、８に対応する、本発明の実施例２を示している。本例の場合は、各リム部１１ａ、１１ａの外周面（被案内面）に、この外周面から凹入する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした凹溝１６、１６を設けている。本例の場合、これら各凹溝１６、１６を、上記被案内面の他の部分よりも径方向に凹んだ、特許請求の範囲に記載した凹部としている。上記各凹溝１６、１６は、上記各リム部１１ａ、１１ａにそれぞれ３乃至各ポケット１３、１３と同数ずつ、軸方向に関して互いに整合する状態で設ける事が好ましい。本例の場合には、上記各凹溝１６、１６を、上記各ポケット１３、１３と同数設けている。即ち、これら各凹溝１６、１６を、上記各リム部１１ａ、１１ａの周面のうちで各柱部１２、１２と整合する部分から外れた部分、より具体的には円周方向に隣り合う柱部１２、１２同士の中央部（ポケット１３、１３の円周方向中央部に整合する部分）に、それぞれ設けている。   Next, FIG. 5 shows Embodiment 2 of the present invention corresponding to claims 1, 3, 4, 6, 7 and 8. In the case of this example, the concave groove 16 having an arc-shaped cross section with respect to a virtual plane perpendicular to the central axis in a state where the outer peripheral surface (guided surface) of each rim portion 11a, 11a is recessed from the outer peripheral surface. 16 are provided. In the case of this example, each of these concave grooves 16, 16 is a concave portion described in the claims, which is recessed in the radial direction from the other portions of the guided surface. The concave grooves 16 and 16 are preferably provided in the rim portions 11a and 11a so as to be aligned with each other in the axial direction by the same number as the three to pockets 13 and 13, respectively. In the case of this example, the same number of the grooves 16 and 16 as the pockets 13 and 13 are provided. That is, the concave grooves 16 and 16 are adjacent to each other in the circumferential surface of the rim portions 11a and 11a, and more specifically in the circumferential direction. It is provided in the central part of the column parts 12, 12 (part aligned with the central part in the circumferential direction of the pockets 13, 13).

又、上記各凹溝１６、１６の曲率半径Ｒは、合成樹脂製保持器１０の外径をＤとした場合に、Ｄ／５０≦Ｒ≦Ｄ／１０（より好ましくはＤ／３０≦Ｒ≦Ｄ／１５）としている。但し、この様に各凹溝１６、１６の曲率半径Ｒを規制する場合でも、上記各凹溝１６、１６の上記被案内面からの凹入量（凹溝１６の底部とこの凹溝１６から外れた円筒面部分との径方向距離）ｔは、０．５mm≦ｔ≦４．０mm（より好ましくは１．０≦ｔ≦３．０mm）とする事が好ましい。   The radius of curvature R of each of the concave grooves 16 and 16 is D / 50 ≦ R ≦ D / 10 (more preferably D / 30 ≦ R ≦ when the outer diameter of the synthetic resin cage 10 is D. D / 15). However, even when the radius of curvature R of each concave groove 16, 16 is regulated in this way, the amount of concave insertion from the guided surface of each of the concave grooves 16, 16 (from the bottom of the concave groove 16 and the concave groove 16 The radial distance (t) from the removed cylindrical surface portion) t is preferably 0.5 mm ≦ t ≦ 4.0 mm (more preferably 1.0 ≦ t ≦ 3.0 mm).

尚、上記各凹溝１６、１６の曲率半径ＲがＤ／５０未満の場合、或は、上記各凹溝１６、１６の上記被案内面からの凹入量ｔが０．５mm未満の場合には、これら各凹溝１６、１６を通じて被案内面と案内面との摺接部に潤滑剤（グリースや潤滑油、グリースと潤滑油の混合物等）を十分に溜める事ができなくなり、上記被案内面と案内面との摺接部で潤滑剤が枯渇し易くなる可能性がある。一方、上記各凹溝１６、１６の曲率半径ＲがＤ／１０を超える場合、或は、上記各凹溝１６、１６の上記被案内面からの凹入量ｔが４．０mmを超える場合には、これら各凹溝１６、１６が大きくなり過ぎて、上記各リム部１１ａ、１１ａの強度、延いては上記合成樹脂製保持器１０の強度を十分に確保できなくなる可能性がある。   When the radius of curvature R of each of the concave grooves 16 and 16 is less than D / 50, or when the concave insertion amount t of the concave grooves 16 and 16 from the guided surface is less than 0.5 mm. Cannot sufficiently store a lubricant (grease, lubricating oil, mixture of grease and lubricating oil, etc.) at the sliding contact portion between the guided surface and the guiding surface through the concave grooves 16, 16. There is a possibility that the lubricant is easily depleted at the sliding contact portion between the surface and the guide surface. On the other hand, when the radius of curvature R of each of the concave grooves 16 and 16 exceeds D / 10, or when the concave insertion amount t of the concave grooves 16 and 16 from the guided surface exceeds 4.0 mm. These concave grooves 16, 16 become too large, and there is a possibility that the strength of each of the rim portions 11a, 11a, and hence the strength of the synthetic resin cage 10 cannot be sufficiently secured.

上述の様に構成する本例の合成樹脂製保持器１０によれば、高速運転、微量潤滑等の厳しい使用条件の下でも、耐久性並びに安定性を確保できる。即ち、上述の様に合成樹脂製保持器１０の被案内面に凹溝１６、１６を設ける為、これら各凹溝１６、１６に溜まった潤滑剤が、円筒ころ軸受３ａを構成する内向鍔部６ａ、６ｂ（図３参照）の内周面（案内面）と上記被案内面との摺接部に取り込まれる。この為、この摺接部で潤滑剤が枯渇する事を防止でき、この潤滑剤の枯渇に基づく摩耗や振動、温度上昇、溶着、焼き付き等を防止できる。その他の構成及び作用は、前述した実施例１と同様であるから、重複する説明は省略する。   According to the synthetic resin cage 10 of the present example configured as described above, durability and stability can be ensured even under severe use conditions such as high speed operation and micro lubrication. That is, since the concave grooves 16 and 16 are provided on the guided surface of the synthetic resin cage 10 as described above, the lubricant accumulated in each of the concave grooves 16 and 16 is an inward flange portion that constitutes the cylindrical roller bearing 3a. 6a and 6b (see FIG. 3) are taken into the sliding contact portion between the inner peripheral surface (guide surface) and the guided surface. For this reason, it is possible to prevent the lubricant from being depleted at the sliding contact portion, and it is possible to prevent wear, vibration, temperature rise, welding, seizure, and the like due to the depletion of the lubricant. Other configurations and operations are the same as those of the first embodiment described above, and thus redundant description is omitted.

次に、図６は、請求項１、２、４、６、７、８に対応する、本発明の実施例３を示している。本例の場合は、合成樹脂製保持器１０の内周面のうち軸方向両端部内周面、即ち、各リム部１１ｂ、１１ｂの内周面を、円筒ころ軸受を構成する内輪の端部外周面に設けた外向鍔部の外周面（案内面）に近接対向させる事により、上記合成樹脂製保持器１０の直径方向位置決めを行なう被案内面としている。そして、上記各リム部１１ｂ、１１ｂの内周面（被案内面）に、この内周面から径方向内方に突出する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした凸部１４、１４を設けている。   Next, FIG. 6 shows Embodiment 3 of the present invention corresponding to claims 1, 2, 4, 6, 7, and 8. In the case of this example, the inner peripheral surface of both ends in the axial direction of the inner peripheral surface of the synthetic resin cage 10, that is, the inner peripheral surface of each rim portion 11 b, 11 b is the outer periphery of the end portion of the inner ring constituting the cylindrical roller bearing. By making the outer peripheral surface (guide surface) of the outward flange portion provided on the surface close to and facing, the guided surface for positioning the synthetic resin cage 10 in the diameter direction is used. And the cross section regarding the virtual plane orthogonal to a central axis is made into circular arc shape in the state which protrudes to the inner peripheral surface (guided surface) of each said rim | limb part 11b, 11b radially inward from this inner peripheral surface. Protrusions 14 and 14 are provided.

又、本例の場合、各ポケット１３、１３の開口縁のうちの上記各リム部１１ｂ、１１ｂの径方向に関して前記被案内面と反対側（外径側）の開口縁の一部（軸方向中間部）の円周方向に関する距離ｗを、各円筒ころ４の外径ｄよりも小さく（ｗ＜ｄ）している。即ち、本例の場合には、上記各ポケット１３、１３の内面のうちの外径側半部の円周方向に関する距離ｗを、径方向内方に向かうに従って漸減させている。言い換えれば、これら各ポケット１３、１３の内面の外径側半部を、外径側に向かう程狭くなる様に傾斜（並びに湾曲）させている。この様な構成により、上記各ポケット１３、１３に上記各円筒ころ４を、上記合成樹脂製保持器１０の径方向内方からのみ挿入自在とし、且つ、上記外径側の各開口縁を通過不能に保持自在としている。その他の構成及び作用は、前述した実施例１と同様であるから、重複する説明は省略する。   In the case of this example, a part of the opening edge on the side opposite to the guided surface (outer diameter side) with respect to the radial direction of each rim portion 11b, 11b of the opening edge of each pocket 13, 13 (axial direction) The distance w in the circumferential direction of the intermediate portion is smaller than the outer diameter d of each cylindrical roller 4 (w <d). That is, in the case of this example, the distance w in the circumferential direction of the outer diameter side half of the inner surfaces of the pockets 13 and 13 is gradually decreased toward the inner side in the radial direction. In other words, the outer diameter side halves of the inner surfaces of these pockets 13 and 13 are inclined (and curved) so as to become narrower toward the outer diameter side. With this configuration, the cylindrical rollers 4 can be inserted into the pockets 13 and 13 only from the inside in the radial direction of the synthetic resin cage 10 and pass through the opening edges on the outer diameter side. It is impossible to hold. Other configurations and operations are the same as those of the first embodiment described above, and thus redundant description is omitted.

次に、図７は、請求項１、３、４、６、７、８に対応する、本発明の実施例４を示している。本例の場合も、合成樹脂製保持器１０の内周面のうち軸方向両端部内周面、即ち、各リム部１１ｃ、１１ｃの内周面を、円筒ころ軸受を構成する内輪の端部外周面に設けた外向鍔部の外周面（案内面）に近接対向させる事により、上記合成樹脂製保持器１０の径方向に関する位置決めを図る為の被案内面としている。そして、本例の場合は、上記各リム部１１ｃ、１１ｃの内周面（被案内面）に、この内周面から凹入する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした凹溝１６、１６を設けている。その他の構成及び作用は、上述した実施例３及び前述した実施例２と同様であるから、重複する説明は省略する。   Next, FIG. 7 shows Embodiment 4 of the present invention corresponding to claims 1, 3, 4, 6, 7 and 8. Also in this example, the inner peripheral surface of both ends in the axial direction of the inner peripheral surface of the synthetic resin cage 10, that is, the inner peripheral surface of each rim portion 11 c, 11 c is the outer periphery of the end portion of the inner ring constituting the cylindrical roller bearing. A guided surface for positioning in the radial direction of the synthetic resin retainer 10 is formed by making it face and face the outer peripheral surface (guide surface) of the outward flange provided on the surface. And in the case of this example, the cross section regarding the virtual plane orthogonal to the central axis is circular arc-shaped in a state where the inner peripheral surface (guided surface) of each of the rim portions 11c, 11c is recessed from the inner peripheral surface. The recessed grooves 16 and 16 are provided. Other configurations and operations are the same as those in the above-described third embodiment and the above-described second embodiment.

次に、図８は、請求項１、２、５、６、７、８に対応する、本発明の実施例５を示している。本例の場合は、合成樹脂製保持器１０の外周面のうち軸方向両端部外周面、即ち、各リム部１１ｄ、１１ｄの外周面を、円筒ころ軸受３ａを構成する外輪１の両端部内周面に設けた内向鍔部６ａ、６ｂ（図３参照）の内周面（案内面）に近接対向させる事により、上記合成樹脂製保持器１０の直径方向位置決めを行なう被案内面としている。そして、この被案内面に、この被案内面から突出する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした凸部１４、１４を設けている。本例の場合、これら各凸部１４、１４を、上記各リム部１１ｄ、１１ｄの外周面のうちで、各柱部１２ａ、１２ａと整合する部分並びにこれら各柱部１２ａ、１２ａの外周面に、それぞれ設けている。その他の構成及び作用は、前述した実施例１と同様であるから、重複する説明は省略する。   Next, FIG. 8 shows Embodiment 5 of the present invention corresponding to claims 1, 2, 5, 6, 7, and 8. In the case of this example, the outer circumferential surface of both ends in the axial direction of the outer circumferential surface of the synthetic resin cage 10, that is, the outer circumferential surface of each rim portion 11 d, 11 d is the inner circumference of the outer ring 1 constituting the cylindrical roller bearing 3 a. The guided surface for positioning in the diametrical direction of the synthetic resin cage 10 is formed by making it face and face the inner peripheral surface (guide surface) of the inwardly directed flanges 6a and 6b (see FIG. 3) provided on the surface. And the convex part 14 and 14 which made the cross section regarding the virtual plane orthogonal to a central axis circular arc shape in the state protruded from this guided surface in this guided surface. In the case of this example, these convex portions 14 and 14 are arranged on the outer peripheral surfaces of the rim portions 11d and 11d on the outer peripheral surfaces of the column portions 12a and 12a and the outer peripheral surfaces of the column portions 12a and 12a. , Each provided. Other configurations and operations are the same as those of the first embodiment described above, and thus redundant description is omitted.

次に、図９は、請求項１、３、５、６、７、８に対応する、本発明の実施例６を示している。本例の場合も、合成樹脂製保持器１０の外周面のうち軸方向両端部外周面、即ち、各リム部１１ｅ、１１ｅの外周面を、円筒ころ軸受３ａを構成する外輪１の両端部内周面に設けた内向鍔部６ａ、６ｂ（図３参照）の内周面（案内面）に近接対向させる事により、上記合成樹脂製保持器１０の直径方向位置決めを行なう被案内面としている。そして、この被案内面に、この案内面から凹入する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした凹溝１６、１６を設けている。本例の場合、これら各凹溝１６、１６を、上記各リム部１１ｅ、１１ｅの外周面のうちで、各柱部１２ｂ、１２ｂと整合する部分並びにこれら各柱部１２ｂ、１２ｂの外周面に、それぞれ設けている。その他の構成及び作用は、前述した実施例２と同様であるから、重複する説明は省略する。   Next, FIG. 9 shows Embodiment 6 of the present invention corresponding to claims 1, 3, 5, 6, 7, and 8. Also in the case of this example, the outer peripheral surface of both ends in the axial direction of the outer peripheral surface of the synthetic resin cage 10, that is, the outer peripheral surface of each rim portion 11e, 11e is the inner periphery of both ends of the outer ring 1 constituting the cylindrical roller bearing 3a. The guided surface for positioning in the diametrical direction of the synthetic resin cage 10 is formed by making it face and face the inner peripheral surface (guide surface) of the inwardly directed flanges 6a and 6b (see FIG. 3) provided on the surface. Then, in the guided surface, recessed grooves 16 and 16 having arcuate cross sections with respect to a virtual plane orthogonal to the central axis in a state of being recessed from the guiding surface are provided. In the case of this example, these concave grooves 16 and 16 are formed on the outer peripheral surfaces of the rim portions 11e and 11e on the outer peripheral surfaces of the column portions 12b and 12b and the outer peripheral surfaces of the column portions 12b and 12b. , Each provided. Other configurations and operations are the same as those of the above-described second embodiment, and thus redundant description is omitted.

次に、図１０は、請求項１、２、５、６、７、８に対応する、本発明の実施例７を示している。本例の場合は、合成樹脂製保持器１０の内周面のうち軸方向両端部内周面、即ち、各リム部１１ｆ、１１ｆの内周面を、円筒ころ軸受を構成する内輪の端部外周面に設けた外向鍔部の外周面（案内面）に近接対向させる事により、上記合成樹脂製保持器１０の直径方向位置決めを行なう被案内面としている。そして、この被案内面に、この被案内面から突出する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした凸部１４、１４を設けている。本例の場合、これら各凸部１４、１４を、上記各リム部１１ｆ、１１ｆの内周面のうちで、各柱部１２ｃ、１２ｃと整合する部分並びにこれら各柱部１２ｃ、１２ｃの内周面に、それぞれ設けている。その他の構成及び作用は、前述した実施例１及び実施例３と同様であるから、重複する説明は省略する。   Next, FIG. 10 shows Embodiment 7 of the present invention corresponding to claims 1, 2, 5, 6, 7, and 8. In the case of this example, the inner peripheral surface of both ends in the axial direction of the inner peripheral surface of the synthetic resin cage 10, that is, the inner peripheral surface of each rim portion 11f, 11f is the outer periphery of the end portion of the inner ring constituting the cylindrical roller bearing. By making the outer peripheral surface (guide surface) of the outward flange portion provided on the surface close to and facing, the guided surface for positioning the synthetic resin cage 10 in the diameter direction is used. And the convex part 14 and 14 which made the cross section regarding the virtual plane orthogonal to a central axis circular arc shape in the state protruded from this guided surface in this guided surface. In the case of this example, these convex portions 14 and 14 are arranged on the inner peripheral surface of each of the rim portions 11f and 11f so as to align with the column portions 12c and 12c and the inner periphery of the column portions 12c and 12c. Each is provided on the surface. Other configurations and operations are the same as those of the first embodiment and the third embodiment described above, and thus a duplicate description is omitted.

次に、図１１は、請求項１、３、５、６、７、８に対応する、本発明の実施例８を示している。本例の場合も、合成樹脂製保持器１０の内周面のうち軸方向両端部内周面、即ち、各リム部１１ｇ、１１ｇの内周面を、円筒ころ軸受を構成する内輪の端部外周面に設けた外向鍔部の外周面（案内面）に近接対向させる事により、上記合成樹脂製保持器１０の直径方向位置決めを行なう被案内面としている。そして、この被案内面に、この被案内面から凹入する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした凹溝１６、１６を設けている。本例の場合、これら各凹溝１６、１６を、上記各リム部１１ｇ、１１ｇの内周面のうちで、各柱部１２ｄ、１２ｄと整合する部分並びにこれら各柱部１２ｄ、１２ｄの外周面に、それぞれ設けている。その他の構成及び作用は、前述した実施例２及び実施例３と同様であるから、重複する説明は省略する。   Next, FIG. 11 shows Embodiment 8 of the present invention corresponding to claims 1, 3, 5, 6, 7, and 8. Also in this example, the inner peripheral surface of both ends in the axial direction of the inner peripheral surface of the synthetic resin cage 10, that is, the inner peripheral surface of each rim portion 11g, 11g is the outer periphery of the end portion of the inner ring constituting the cylindrical roller bearing. By making the outer peripheral surface (guide surface) of the outward flange portion provided on the surface close to and facing, the guided surface for positioning the synthetic resin cage 10 in the diameter direction is used. Then, in the guided surface, recessed grooves 16 and 16 having arcuate cross sections with respect to a virtual plane orthogonal to the central axis in a state of being recessed from the guided surface are provided. In the case of this example, the concave grooves 16 and 16 are formed on the inner peripheral surfaces of the rim portions 11g and 11g, the portions aligned with the column portions 12d and 12d, and the outer peripheral surfaces of the column portions 12d and 12d. Respectively. Other configurations and operations are the same as those in the second embodiment and the third embodiment described above, and therefore, a duplicate description is omitted.

本発明の実施例１を、上半部を切断して示す側面図。The side view which cuts and shows the upper half part of Example 1 of this invention. 図１のＡ−Ａ断面図。AA sectional drawing of FIG. ころ軸受に組み付けた状態で示す断面図。Sectional drawing shown in the state assembled | attached to the roller bearing. 実験結果を示す線図。The diagram which shows an experimental result. 本発明の実施例２を示す、図１と同様の側面図。The side view similar to FIG. 1 which shows Example 2 of this invention. 同実施例３を示す、図１と同様の側面図。The side view similar to FIG. 1 which shows the same Example 3. FIG. 同実施例４を示す、図１と同様の側面図。The side view similar to FIG. 1 which shows the same Example 4. FIG. 同実施例５を示す、図１と同様の側面図。The side view similar to FIG. 1 which shows the same Example 5. FIG. 同実施例６を示す、図１と同様の側面図。The side view similar to FIG. 1 which shows the same Example 6. FIG. 同実施例７を示す、図１と同様の側面図。The side view similar to FIG. 1 which shows the same Example 7. FIG. 同実施例８を示す、図１と同様の側面図。The side view similar to FIG. 1 which shows the same Example 8. FIG. 従来構造をころ軸受に組み付けた状態で示す断面図。Sectional drawing shown in the state which assembled | attached the conventional structure to the roller bearing. 上半部を切断して示す、図１２の右方から見た図。The figure seen from the right side of FIG. 12 which cuts and shows an upper half part.

符号の説明Explanation of symbols

１ 外輪
２ 内輪
３ 円筒ころ軸受
４ 円筒ころ
５ 外輪軌道
６ａ、６ｂ 内向鍔部
７ 内輪軌道
８ 外向鍔部
９ 保持器
１０ 合成樹脂製保持器
１１、１１ａ〜１１ｇ リム部
１２、１２ａ〜１２ｄ 柱部
１３ ポケット
１４ 凸部
１５ 凹部
１６ 凹溝
DESCRIPTION OF SYMBOLS 1 Outer ring 2 Inner ring 3 Cylindrical roller bearing 4 Cylindrical roller 5 Outer ring raceway 6a, 6b Inward flange part 7 Inner ring raceway 8 Outer flange part 9 Cage 10 Synthetic resin cage 11, 11a-11g Rim part 12, 12a-12d Pillar part 13 Pocket 14 Convex part 15 Concave part 16 Concave groove

Claims (9)

内周面に外輪軌道を有する外輪と、外周面に内輪軌道を有する内輪と、外周面を上記外輪軌道及び内輪軌道に接触する転動面とした複数のころとを備えたころ軸受に組み込んだ状態で、これら各ころを転動自在に保持する為、合成樹脂を射出成形する事により一体に形成して成り、軸方向に互いに間隔をあけて配置した１対のリム部と、円周方向に亙って間欠的に配置され、それぞれの両端部を上記各リム部の互いに対向する内側面に連続させた複数本の柱部とを備え、円周方向に隣り合うこれら各柱部の円周方向両側面と上記各リム部の互いに対向する内側面とにより四周を囲まれる矩形の空間部分を上記各ころを転動自在に保持する為のポケットとすると共に、上記各リム部の外周面と内周面とのうちの一方の周面である被案内面を上記外輪の内周面と上記内輪の外周面とのうちの一方の周面である案内面に近接対向させる事により、径方向に関する位置決めを図られるころ軸受用合成樹脂製保持器に於いて、円周方向に関して上記被案内面の一部に、この被案内面の他の部分よりも径方向に凹んだ凹部を設けた事を特徴とするころ軸受用合成樹脂製保持器。   Incorporated into a roller bearing comprising an outer ring having an outer ring raceway on the inner peripheral surface, an inner ring having an inner ring raceway on the outer peripheral surface, and a plurality of rollers having outer peripheral surfaces as rolling surfaces that contact the outer ring raceway and the inner ring raceway. In order to hold these rollers in a freely rollable manner, a synthetic resin is integrally formed by injection molding, and a pair of rim portions arranged at intervals in the axial direction, and a circumferential direction A plurality of column portions that are intermittently arranged over each other and have both end portions connected to inner surfaces facing each other of the rim portions, and the circles of these column portions adjacent to each other in the circumferential direction. A rectangular space surrounded by the four circumferences by both circumferential side surfaces and inner surfaces facing each other of the rim portions serves as a pocket for holding the rollers in a freely rolling manner, and the outer peripheral surfaces of the rim portions. The guided surface which is one of the inner peripheral surface and the inner peripheral surface is In a synthetic resin cage for roller bearings that can be positioned in the radial direction by making the guide surface, which is one of the inner peripheral surface of the ring and the outer peripheral surface of the inner ring, face closely to each other. A synthetic resin cage for roller bearings, characterized in that a concave portion that is recessed in a radial direction is provided in a part of the guided surface with respect to the circumferential direction. 各リム部の被案内面にこの被案内面から突出する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした複数の凸部を設け、これら各凸部同士の間部分を凹部とした、請求項１に記載したころ軸受用合成樹脂製保持器。   A plurality of convex portions having an arc-shaped cross section with respect to a virtual plane orthogonal to the central axis are provided on the guided surface of each rim portion in a state of projecting from the guided surface, and a portion between these convex portions is recessed. The synthetic resin cage for roller bearings according to claim 1. 各リム部の被案内面にこの被案内面から凹入する状態で、中心軸に直交する仮想平面に関する断面を円弧形とした複数の凹溝を設け、これら各凹溝を凹部とした、請求項１に記載したころ軸受用合成樹脂製保持器。   In a state where the guided surface of each rim portion is recessed from the guided surface, a plurality of concave grooves having an arc shape in a cross section related to a virtual plane orthogonal to the central axis are provided, and each concave groove is defined as a concave portion. A synthetic resin cage for a roller bearing according to claim 1. 各リム部の被案内面のうちで各柱部と整合する部分から外れた部分に、凸部若しくは凹溝を設けた、請求項２〜３の何れかに記載したころ軸受用合成樹脂製保持器。   The synthetic resin holding for roller bearings according to any one of claims 2 to 3, wherein a convex portion or a concave groove is provided in a portion of the guided surface of each rim portion that is deviated from a portion aligned with each column portion. vessel. 各リム部の被案内面のうちで各柱部と整合する部分並びにこれら各柱部の周面に、凸部若しくは凹溝を設けた、請求項２〜３の何れかに記載したころ軸受用合成樹脂製保持器。   The roller bearing according to any one of claims 2 to 3, wherein a convex portion or a concave groove is provided on a portion of the guided surface of each rim portion that is aligned with each column portion and on a peripheral surface of each column portion. Synthetic resin cage. 各柱部のうちの径方向に関して被案内面と反対側となる部分を各リム部の周面よりも径方向に突出させ、この突出させた部分に、射出成形の際に合成樹脂を送り込む為のゲートを配置した、請求項１〜５の何れかに記載したころ軸受用合成樹脂製保持器。   To project the portion of each column portion that is opposite to the guided surface with respect to the radial direction in the radial direction from the peripheral surface of each rim portion, and to feed synthetic resin into this projected portion during injection molding A synthetic resin cage for roller bearings according to any one of claims 1 to 5, wherein the gate is disposed. ころ軸受を構成する各ころを、各ポケットの内径側開口縁側を通過不能に保持自在とした、請求項１〜６の何れかに記載したころ軸受用合成樹脂製保持器。   The roller made of a synthetic resin for roller bearings according to any one of claims 1 to 6, wherein each roller constituting the roller bearing can be held so as not to pass through an inner diameter side opening edge side of each pocket. 各リム部の軸方向外側面に、この外側面から軸方向内側に凹入する第二の凹部を設けた、請求項１〜７の何れかに記載したころ軸受用合成樹脂製保持器。   The synthetic resin cage for roller bearings according to any one of claims 1 to 7, wherein a second recess is provided in the axially outer surface of each rim portion so as to be recessed axially inward from the outer surface. 内周面に外輪軌道を有する外輪と、外周面に内輪軌道を有する内輪と、外周面を上記外輪軌道及び内輪軌道に接触する転動面とした複数のころと、これら各ころを転動自在に保持する保持器とを備えたころ軸受に於いて、この保持器が請求項１〜８の何れかに記載したころ軸受用合成樹脂製保持器である事を特徴とするころ軸受。
An outer ring having an outer ring raceway on the inner peripheral surface, an inner ring having an inner ring raceway on the outer peripheral surface, a plurality of rollers having the outer peripheral surface as a rolling surface in contact with the outer ring raceway and the inner ring raceway, and each of these rollers can freely roll. A roller bearing provided with a retainer for holding a roller bearing, wherein the retainer is a synthetic resin retainer for a roller bearing according to any one of claims 1 to 8.
JP2003290664A 2003-08-08 2003-08-08 Cage made out of synthetic resin for roller bearing, and roller bearing Pending JP2005061483A (en)

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Cited By (12)

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JP2008025759A (en) * 2006-07-24 2008-02-07 Nsk Ltd Rolling bearing for railway vehicle axle
JP2008121888A (en) * 2006-10-19 2008-05-29 Nsk Ltd Cylindrical roller bearing and spindle device for machine tool
WO2012023437A1 (en) * 2010-08-18 2012-02-23 日本精工株式会社 Rolling bearing and spindle device for machine tool
JP2012127396A (en) * 2010-12-14 2012-07-05 Nsk Ltd Cylindrical roller bearing and spindle device for machine tool
JP2012132506A (en) * 2010-12-21 2012-07-12 Nsk Ltd Cylindrical roller bearing and machine-tool spindle device
JP2012132507A (en) * 2010-12-21 2012-07-12 Nsk Ltd Cylindrical roller bearing and machine-tool spindle device
JP2013011353A (en) * 2006-10-19 2013-01-17 Nsk Ltd Cylindrical roller bearing and main spindle device for machine tool
JP2013142424A (en) * 2012-01-10 2013-07-22 Jtekt Corp Resin retainer
CN103732933A (en) * 2012-06-21 2014-04-16 日本精工株式会社 Rolling bearing, and spindle device for machine tool
TWI491813B (en) * 2012-10-30 2015-07-11 Hiwin Tech Corp Retainer for a cross roller bearing
WO2015110103A1 (en) * 2014-01-22 2015-07-30 Schaeffler Technologies AG & Co. KG Lubrication-optimized roller bearing cage for cylindrical roller bearings
US10323686B2 (en) 2015-10-01 2019-06-18 Shuichi NOWATARI Radial roller bearing

Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008025759A (en) * 2006-07-24 2008-02-07 Nsk Ltd Rolling bearing for railway vehicle axle
JP2013011353A (en) * 2006-10-19 2013-01-17 Nsk Ltd Cylindrical roller bearing and main spindle device for machine tool
JP2008121888A (en) * 2006-10-19 2008-05-29 Nsk Ltd Cylindrical roller bearing and spindle device for machine tool
KR101368100B1 (en) * 2010-08-18 2014-02-27 닛본 세이고 가부시끼가이샤 Rolling bearing and spindle device for machine tool
CN102483092A (en) * 2010-08-18 2012-05-30 日本精工株式会社 Rolling bearing and spindle device for machine tool
JP2016128720A (en) * 2010-08-18 2016-07-14 日本精工株式会社 Rolling bearing and machine tool spindle device
WO2012023437A1 (en) * 2010-08-18 2012-02-23 日本精工株式会社 Rolling bearing and spindle device for machine tool
TWI481786B (en) * 2010-08-18 2015-04-21 Nsk Ltd Rolling bearings and machine tool spindle device
CN104747599A (en) * 2010-08-18 2015-07-01 日本精工株式会社 Rolling bearing and spindle device for machine tool
JP6016632B2 (en) * 2010-08-18 2016-10-26 日本精工株式会社 Rolling bearings and spindles for machine tools
JP2012127396A (en) * 2010-12-14 2012-07-05 Nsk Ltd Cylindrical roller bearing and spindle device for machine tool
JP2012132506A (en) * 2010-12-21 2012-07-12 Nsk Ltd Cylindrical roller bearing and machine-tool spindle device
JP2012132507A (en) * 2010-12-21 2012-07-12 Nsk Ltd Cylindrical roller bearing and machine-tool spindle device
JP2013142424A (en) * 2012-01-10 2013-07-22 Jtekt Corp Resin retainer
CN103732933A (en) * 2012-06-21 2014-04-16 日本精工株式会社 Rolling bearing, and spindle device for machine tool
CN105736579A (en) * 2012-06-21 2016-07-06 日本精工株式会社 Rolling bearing, and spindle device for machine tool
CN103732933B (en) * 2012-06-21 2016-11-23 日本精工株式会社 Rolling bearing and spindle device for machine tool
TWI491813B (en) * 2012-10-30 2015-07-11 Hiwin Tech Corp Retainer for a cross roller bearing
WO2015110103A1 (en) * 2014-01-22 2015-07-30 Schaeffler Technologies AG & Co. KG Lubrication-optimized roller bearing cage for cylindrical roller bearings
US10323686B2 (en) 2015-10-01 2019-06-18 Shuichi NOWATARI Radial roller bearing

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