JP2007332995A - Cage for ball bearing and ball bearing using the same - Google Patents

Cage for ball bearing and ball bearing using the same Download PDF

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JP2007332995A
JP2007332995A JP2006162411A JP2006162411A JP2007332995A JP 2007332995 A JP2007332995 A JP 2007332995A JP 2006162411 A JP2006162411 A JP 2006162411A JP 2006162411 A JP2006162411 A JP 2006162411A JP 2007332995 A JP2007332995 A JP 2007332995A
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cage
ball bearing
ball
pockets
pocket
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Azusa Otani
梓 大谷
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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
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
    • F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
    • F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb 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
    • F16C33/38—Ball cages
    • F16C33/3831—Ball cages with hybrid structure, i.e. with parts made of distinct materials
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/44—Selection of substances
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/008—Identification means, e.g. markings, RFID-tags; Data transfer means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
    • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract


【課題】回転時における潤滑油などの攪拌抵抗をより小さくすることができる新規な玉軸受用保持器およびこれを用いた玉軸受の提供。
【解決手段】内輪1と外輪2間で転動する複数のボール3を保持するための玉軸受用保持器4であって、リング状の保持器本体4aにポケット4bを複数備えると共に、当該保持器本体4aの各ポケット4b、4b間の端面形状を、隣接するポケット4b、4b間で連続するように滑らかな曲面とし、保持器ポケット4bの回転方向上流側縁部3aをボール3組み込み持に弾性変形可能とする。これによって、その周囲の潤滑油がその各ポケット4b、4b間の曲面状の端面に沿ってスムーズに流れるようになるため、その端面部分での流体の攪拌が発生しなくなって攪拌抵抗が大幅に減少すると共に、ボール3の保持器ポケット4bへの組み込み性を向上させる。
【選択図】 図３
A novel ball bearing cage capable of further reducing agitation resistance of lubricating oil or the like during rotation and a ball bearing using the same.
A ball bearing retainer 4 for retaining a plurality of balls 3 that roll between an inner ring 1 and an outer ring 2, the ring-shaped retainer body 4a having a plurality of pockets 4b, and the holding The end face shape between each pocket 4b, 4b of the cage body 4a is a smooth curved surface so as to be continuous between adjacent pockets 4b, 4b, and the upstream edge 3a in the rotational direction of the cage pocket 4b is incorporated into the ball 3 It can be elastically deformed. As a result, the surrounding lubricating oil flows smoothly along the curved end surface between the pockets 4b, 4b, so that the agitation of the fluid does not occur at the end surface portion and the agitation resistance is greatly increased. As well as decreasing, the incorporation of the ball 3 into the cage pocket 4b is improved.
[Selection] Figure 3

Description

本発明は、油浴潤滑下などの深溝玉軸受などのようにボールおよびその保持器の周囲が潤滑油で満たされた玉軸受に係り、特にそのボールを保持するための保持器およびこれを用いた玉軸受に関するものである。   The present invention relates to a ball bearing in which the periphery of the ball and its cage is filled with lubricating oil, such as a deep groove ball bearing under oil bath lubrication, and the like, and in particular, a cage for holding the ball and the use thereof It relates to a ball bearing.

一般に油浴潤滑下などで使用される玉軸受は、図５に示すように、回転する軸体側に支持される内輪１と、静止体側に支持される外輪２と、その間に設けられる複数のボール（転動体）３と、これらボール３を保持するための保持器４から主に構成されている。
そして、この保持器４としては、打抜き保持器やかご形保持器などのように金属材料からなるものが多いが、最近では、金属材料に比べて自己潤滑性や耐摩耗性に優れた合成樹脂材料からなるものが多く採用されてきている。 As shown in FIG. 5, a ball bearing generally used under oil bath lubrication includes an inner ring 1 supported on a rotating shaft body side, an outer ring 2 supported on a stationary body side, and a plurality of balls provided therebetween. (Rolling body) 3 and a cage 4 for holding these balls 3 are mainly composed.
The retainer 4 is often made of a metal material such as a punched cage or a cage retainer, but recently, a synthetic resin superior in self-lubricity and wear resistance compared to a metal material. Many materials have been adopted.

このような合成樹脂製の保持器４としては、例えば図６に示すようないわゆる冠型樹脂保持器４がある。この冠型樹脂保持器４は、リング状をした保持器本体４ａの端面に複数のポケット４ｂがその周方向に沿って一定の間隔を隔てて設けられており、これら各ポケット４ｂ、４ｂ…にそれぞれボール３を回転自在に収容することで、これら各ボール３、３…をそれぞれ一定の間隔を隔てて保持するようになっている。   An example of such a synthetic resin cage 4 is a so-called crown type resin cage 4 as shown in FIG. In the crown-shaped resin retainer 4, a plurality of pockets 4b are provided on the end face of a ring-shaped retainer main body 4a at regular intervals along the circumferential direction, and the pockets 4b, 4b,. Each of the balls 3 is rotatably accommodated to hold the balls 3, 3,... At a predetermined interval.

ところで、図６に示したような冠型樹脂保持器４は、各ポケット４ｂ、４ｂ…に収容されたボール３の脱落を防止するために、各ポケット４ｂ、４ｂ…の縁部には、収容されたボール３を抱えるように突出した爪４ｃ、４ｃが設けられている。
このため、各ポケット４ｂ、４ｂ…間には大きな溝部４ｄが形成されることになり、この溝部４ｄによって冠型樹脂保持器４が回転したときにその周囲の潤滑油を不要に攪拌してしまい、攪拌抵抗による潤滑油の温度上昇や気泡の発生を誘発することがある。 Incidentally, the crown-shaped resin retainer 4 as shown in FIG. 6 is accommodated at the edge of each pocket 4b, 4b... To prevent the balls 3 accommodated in the pockets 4b, 4b. Claws 4c and 4c that protrude so as to hold the ball 3 are provided.
For this reason, a large groove 4d is formed between the pockets 4b, 4b,... And when the crown-shaped resin retainer 4 is rotated by the groove 4d, the surrounding lubricating oil is unnecessarily agitated. , Lubricating oil temperature rise and bubble generation may be induced by stirring resistance.

そのため、例えば特許文献１では、保持器４のポケット４ｂ，４ｂ間の空間を空間埋め部材などで埋めることでその空間による潤滑油の攪拌を極力抑え、攪拌抵抗による温度上昇や気泡の発生を防止するようにしている。
また、特許文献２では、保持器４の内周面と外周面の全面に亘って複数の細い溝を形成することで保持器４周囲の潤滑剤などの流体の流れを整流化し、これによって回転トルクの低減および発熱の抑制を図るようにしている。
特開２００５−１８０６６６号公報 特開２００３−２３２３６２号公報 Therefore, in Patent Document 1, for example, the space between the pockets 4b and 4b of the cage 4 is filled with a space filling member or the like to suppress the stirring of the lubricating oil by the space as much as possible and prevent the temperature rise and the generation of bubbles due to the stirring resistance. Like to do.
Moreover, in patent document 2, the flow of fluids, such as a lubrication around a holder | retainer 4, is rectified | straightened by forming several thin groove | channels over the inner peripheral surface and the whole outer peripheral surface of the holder | retainer 4, and it rotates by this The torque is reduced and the heat generation is suppressed.
JP-A-2005-180666 JP 2003-232362 A

ところで、この特許文献１のように保持器４のポケット４ｂ，４ｂ間の空間を空間埋め部材などで埋めることによってその空間などによる潤滑油の攪拌を抑え、攪拌抵抗による温度上昇や気泡の発生をある程度まで抑制することは可能であるが、ボール３をポケット４ｂへ組み込む場合の変形量が十分でない。
また、特許文献２の技術では、保持器４の内周面と外周面の流体の流れを整流することは可能であるが、保持器４の端面部分の流体の流れまでも整流することは困難である。
そこで、本発明はこのような課題を解決するための案出されたものであり、その主な目的は、回転時における潤滑油などの攪拌抵抗をより小さくすることができると共に、ポケットへのボール組み込み性を改良した新規な玉軸受用保持器およびこれを用いた玉軸受を提供するものである。 By the way, as in Patent Document 1, the space between the pockets 4b and 4b of the cage 4 is filled with a space filling member or the like to suppress the agitation of the lubricating oil by the space and the like. Although it is possible to suppress to a certain extent, the amount of deformation when the ball 3 is incorporated into the pocket 4b is not sufficient.
Further, in the technique of Patent Document 2, it is possible to rectify the fluid flow on the inner peripheral surface and the outer peripheral surface of the cage 4, but it is difficult to rectify even the fluid flow on the end surface portion of the cage 4. It is.
Therefore, the present invention has been devised to solve such problems, and its main purpose is to reduce the agitation resistance of lubricating oil and the like during rotation, and to ball into the pocket. It is intended to provide a novel ball bearing retainer with improved assemblability and a ball bearing using the same.

前記課題を解決するために請求項１の発明は、
内輪と外輪間で転動する複数のボールを保持するための玉軸受用保持器であって、リング状の保持器本体に前記各ボールをその端面側から収容するためのポケットを複数備えると共に、当該保持器本体の各ポケット間の端面形状を、隣接するポケット間で連続するように滑らかな曲面とし、前記ポケットの回転方向上流側の縁部をボール組み込み時に弾性変形可能としたことを特徴とする玉軸受用保持器である。
また、請求項２の発明は、
請求項１に記載の玉軸受用保持器において、前記保持器本体を合成樹脂材料で形成したことを特徴とする玉軸受用保持器である。 In order to solve the above-mentioned problem, the invention of claim 1
A ball bearing retainer for retaining a plurality of balls that roll between an inner ring and an outer ring, the ring-shaped retainer body including a plurality of pockets for accommodating each of the balls from its end face side, The end face shape between each pocket of the cage body is a smooth curved surface so as to be continuous between adjacent pockets, and the edge on the upstream side in the rotation direction of the pocket is elastically deformable when the ball is incorporated. It is a cage for ball bearings.
The invention of claim 2
2. The ball bearing cage according to claim 1, wherein the cage body is made of a synthetic resin material.

また、請求項３の発明は、
請求項１に記載の玉軸受用保持器において、前記保持器本体の各ポケット間に溝部を形成し、当該溝部に前記各ポケット間の曲面形状を維持すべく弾性変形部材を嵌合したことを特徴とする玉軸受用保持器である。
また、請求項４の発明は、
請求項１〜３のいずれか１項に記載の玉軸受用保持器を回転自在に組み込んだことを特徴とする玉軸受である。
また、請求項５の発明は、
請求項４に記載の玉軸受において、前記外輪または内輪の端面に、前記保持器の回転方向を識別する識別情報を付したことを特徴とする玉軸受である。 The invention of claim 3
The ball bearing retainer according to claim 1, wherein a groove is formed between each pocket of the retainer body, and an elastic deformation member is fitted to the groove so as to maintain a curved shape between the pockets. This is a ball bearing cage.
The invention of claim 4
A ball bearing in which the ball bearing retainer according to any one of claims 1 to 3 is rotatably incorporated.
The invention of claim 5
The ball bearing according to claim 4, wherein identification information for identifying a rotation direction of the cage is attached to an end face of the outer ring or the inner ring.

請求項１の発明によれば、保持器本体が回転した際にその周囲の潤滑油がその各ポケット間の曲面状の端面に沿ってスムーズに流れるようになるため、その端面部分での流体の攪拌しなくなって攪拌抵抗が大幅に減少する。この結果、攪拌抵抗による潤滑油の温度上昇や気泡の発生などを効果的に抑制することができる。
請求項２の発明によれば、前記保持器本体を合成樹脂材料で形成したため、前記保持器本体を容易に変形することができる。これによって、各ポケットへのボールの組み込みや交換作業を容易に行うことができる。 According to the first aspect of the present invention, when the cage body rotates, the surrounding lubricating oil flows smoothly along the curved end surfaces between the pockets. Stirring resistance is greatly reduced because stirring is stopped. As a result, it is possible to effectively suppress an increase in the temperature of the lubricating oil due to the stirring resistance and the generation of bubbles.
According to the invention of claim 2, since the cage body is formed of a synthetic resin material, the cage body can be easily deformed. As a result, it is possible to easily perform the work of assembling or replacing the ball in each pocket.

請求項３の発明によれば、請求項２の発明と同様に前記保持器本体を容易に変形することが可能となるため、各ポケットへのボールの組み込みや交換作業を容易に行うことができる。
請求項４の発明によれば、玉軸受に前記請求項１〜３のいずれかに記載の玉軸受用保持器を回転自在に組み込んだことから、攪拌抵抗による潤滑油の温度上昇や気泡の発生などが効果的に抑制されるため、従来よりもさらに長期に亘って安定した軸受性能を維持することができる。
請求項５の発明によれば、前記外輪または内輪の端面に、前記保持器の回転方向を識別する識別情報を付したことから、その識別情報に基づいて前記保持器を玉軸受に組み込み、かつその玉軸受をハウジングなどに組み込むことにより、その回転方向を間違えずに正確に組み込むことができる。 According to the invention of claim 3, since the retainer body can be easily deformed similarly to the invention of claim 2, it is possible to easily incorporate and replace the ball in each pocket. .
According to the invention of claim 4, since the ball bearing cage according to any one of claims 1 to 3 is rotatably incorporated in the ball bearing, the temperature of the lubricating oil rises due to the stirring resistance and the generation of bubbles. Therefore, stable bearing performance can be maintained over a longer period than before.
According to the invention of claim 5, since the identification information for identifying the rotation direction of the cage is attached to the end face of the outer ring or the inner ring, the cage is incorporated in the ball bearing based on the identification information, and By incorporating the ball bearing in a housing or the like, it is possible to accurately incorporate the rotation direction without making a mistake.

以下、本発明の実施形態について図面を参照しながら説明する。
図１は、本発明に係る玉軸受１０の実施の一形態を示したものであり、図２はこの玉軸受１０に組み込まれる保持器４を示す斜視図である。
図示するようにこの玉軸受１０は、外周面に断面円弧状の軌道溝１ａを有する内輪１と、内周面に前記内輪１の軌道面１ａに対向すべく同じく断面円弧状の軌道溝２ａを有する外輪２と、これら軌道溝１ａ，２ａ間に転動自在に配置される複数のボール（転動体）３，３…と、これら各ボール３，３…を一定の間隔を隔てて保持するリング状の保持器４とを備えた構造となっている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows an embodiment of a ball bearing 10 according to the present invention, and FIG. 2 is a perspective view showing a cage 4 incorporated in the ball bearing 10.
As shown in the figure, this ball bearing 10 has an inner ring 1 having a raceway groove 1a having an arcuate cross section on the outer peripheral surface, and a raceway groove 2a having an arcuate cross section to face the raceway surface 1a of the inner ring 1 on the inner peripheral surface. The outer ring 2 having a plurality of balls (rolling elements) 3, 3..., Which are movably arranged between the raceway grooves 1 a and 2 a, and a ring which holds the balls 3, 3. It has a structure provided with a cage 4.

そして、本実施の形態にあっては、これら各ボール３，３…をその周方向に沿って一定の間隔を隔てて保持するリング状の保持器４の一端面が図２および図３に示すように滑らかな連続した波形形状となっている。
すなわち、同図に示すようにこの保持器本体４ａの一端面側からその周方向に沿って一定の間隔を隔てて複数のポケット４ｂ，４ｂ…が形成されていると共に、それら各ポケット４ｂ，４ｂ…にボール３の一部が露出した状態で転動自在に収容されている。そして、この各ポケット４ｂ，４ｂ…間の形状がその露出したボール３の表面（曲面）部分と連続するように曲面状に形成されており、この各ポケット４ｂ，４ｂ…に収容されたボール３の露出面と、その各ポケット４ｂ，４ｂ…間の表面形状とによって曲面が連続した波形端面が形成されるようになっている。 And in this Embodiment, the end surface of the ring-shaped holder | retainer 4 which hold | maintains these each ball | bowl 3,3 ... with a fixed space | interval along the circumferential direction shows in FIG.2 and FIG.3. Thus, it has a smooth continuous waveform shape.
That is, as shown in the figure, a plurality of pockets 4b, 4b,... Are formed at regular intervals along the circumferential direction from one end surface side of the retainer body 4a. Are contained in a freely rotatable manner in a state in which a part of the ball 3 is exposed. .. Are formed in a curved shape so that the shape between the pockets 4b, 4b... Is continuous with the exposed surface (curved surface) portion of the ball 3, and the balls 3 accommodated in the pockets 4b, 4b. A corrugated end face having a continuous curved surface is formed by the exposed surface and the surface shape between the pockets 4b, 4b.

つまり、図６などに示したように従来の保持器４の場合は、各ポケット４ｂ，４ｂ…にボール３を収容したときに、そのポケット４ｂの爪部４ｃと収容されたボール３との境界部に急激な段差が多数形成されてしまうのに対し、本発明の保持器４の場合は図３に示すように特に各ポケット４ｂ，４ｂ…の回転方向上流側の縁部３ａが滑らかに盛り上がってボール３の露出面頂部と連続するような形状となっている。そして、この各ポケット４ｂ，４ｂ…の回転方向下流側の縁部３ｂも、ボール３の露出面底部と連続するような凸状の曲面形状となってそのまま滑らかに盛り上がって次のボール３の露出面頂部と再び連続するような形状となっており、ボール３の露出面の前後において急激な段差部分が皆無となっている。   That is, in the case of the conventional cage 4 as shown in FIG. 6 and the like, when the ball 3 is accommodated in each of the pockets 4b, 4b..., The boundary between the claw portion 4c of the pocket 4b and the accommodated ball 3 In the case of the cage 4 according to the present invention, the edge 3a on the upstream side in the rotational direction of each pocket 4b, 4b... Is smoothly raised as shown in FIG. Thus, the shape is continuous with the top of the exposed surface of the ball 3. Further, the edge 3b on the downstream side in the rotational direction of each of the pockets 4b, 4b... Becomes a convex curved surface that continues to the bottom of the exposed surface of the ball 3 and rises smoothly as it is, so that the next ball 3 is exposed. The shape is such that it is continuous with the top of the surface again, and there are no sudden step portions before and after the exposed surface of the ball 3.

従って、図３に示すように各ボール３，３…の転動に伴って潤滑油の流れが矢印の方向に向かうようにこの保持器４を図２の矢印の回転方向に回転すると、各ポケット４ｂ，４ｂ…が形成された保持器本体４ａ側の端面においてその周囲の潤滑油がその波形端面に沿ってスムーズに流れることになる。
これによって、その端面部分で潤滑油が無用に攪拌しなくなって攪拌抵抗が大幅に減少するため、攪拌抵抗による潤滑油の温度上昇や気泡の発生などを効果的に抑制することができる。 Therefore, when the cage 4 is rotated in the direction of the arrow in FIG. 2 so that the lubricating oil flows in the direction of the arrow as the balls 3, 3. The surrounding lubricating oil smoothly flows along the corrugated end face on the end face on the cage body 4a side where 4b, 4b... Are formed.
As a result, the lubricating oil is not unnecessarily stirred at the end face portion, and the stirring resistance is greatly reduced. Therefore, the temperature rise of the lubricating oil due to the stirring resistance and the generation of bubbles can be effectively suppressed.

さらに、回転方向上流側の縁部３ａおよび下流側の縁部３ｂは、それぞれその先端が細くなっており、ボール３をポケット４ｂに着脱するにあたってこの部分が変形し易いので、ポケット４ｂへのボール３の着脱時の作業性が向上する。
また、この保持器４を弾性変形し易い材料、例えばフェノール樹脂や、四フッ化エチレン樹脂（ＰＴＦＥ、テフロン（登録商標））、ポリアミド（ナイロン）などのように自己潤滑性のみならず可撓性に優れた合成樹脂材料で形成すれば、適度な弾性変形性を発揮することが可能となるため、各ポケット４ｂ，４ｂ…へのボール３の着脱作業をさらに極めて容易に行うことができる。 Furthermore, the edge 3a on the upstream side in the rotation direction and the edge 3b on the downstream side are each narrowed at the tip, and this portion is easily deformed when the ball 3 is attached to or detached from the pocket 4b. The workability at the time of attaching and detaching 3 is improved.
The cage 4 is not only self-lubricating but also flexible, such as a material that is easily elastically deformed, such as phenol resin, tetrafluoroethylene resin (PTFE, Teflon (registered trademark)), and polyamide (nylon). If it is made of an excellent synthetic resin material, it becomes possible to exhibit an appropriate elastic deformability, so that the work of attaching / detaching the ball 3 to / from the pockets 4b, 4b,.

また、この保持器４を、合成樹脂材料のような適度な弾性変形性を有しない剛性が大きい材料、例えば金属などで形成した場合には、図４に示すように、その保持器本体４ａの各ポケット間に溝部４ｄを形成し、その溝部４ｄに各ポケット間４ｂ，４ｂ…の曲面形状を維持すべく弾性変形部材４ｅ、例えばゴムなどの保持器本体４ａより弾性係数が小さい弾性変形部材４ｅを詰め物として嵌合するようにしても良い。なお、この弾性変形部材としてポリウレタンや発泡スチロールなどの吸音特性が優れる材料を用いることにより、音響特性の向上が図れる。   Further, when the retainer 4 is formed of a material having a large rigidity such as a synthetic resin material that does not have an appropriate elastic deformability, for example, a metal or the like, as shown in FIG. A groove portion 4d is formed between the pockets, and an elastic deformation member 4e having an elastic coefficient smaller than that of the retainer body 4a such as rubber is formed in the groove portion 4d so as to maintain the curved surface shape between the pockets 4b, 4b. May be fitted as a filling. The acoustic characteristics can be improved by using a material having excellent sound absorption characteristics such as polyurethane and polystyrene foam as the elastic deformation member.

このような構成にすれば、適度な弾性変形性が発揮されるため、各ポケット４ｂ、４ｂ…へのボール３の着脱作業が容易になると共に、各ポケット間４ｂ，４ｂ…の曲面形状を損なうこともないため、その端面部分での攪拌抵抗を増大させることもなくなる。
また、本実施の形態の保持器４のように、各ポケット４ｂ，４ｂ…の回転方向上流側の縁部３ａが回転方向下流側の縁部３ｂよりも盛り上がるように形成した場合は、その保持器４の回転方向が重要となってくる。すなわち、その回転方向を誤って取り付けると、各ポケット４ｂ，４ｂ…に収容されたボール３の露出面と潤滑油がほぼ直角に衝突してしまい、全く効果が得られないばかりか却って逆効果になってしまう。 With such a configuration, moderate elastic deformability is exhibited, so that it is easy to attach and detach the ball 3 to / from the pockets 4b, 4b, and the curved surface shape between the pockets 4b, 4b is impaired. Therefore, the agitation resistance at the end face portion is not increased.
Further, when the pockets 4b, 4b... Are formed so that the edge 3a on the upstream side in the rotational direction of the pockets 4b, 4b... Rises higher than the edge 3b on the downstream side in the rotational direction. The direction of rotation of the vessel 4 becomes important. That is, if the rotation direction is mistakenly attached, the exposed surfaces of the balls 3 accommodated in the respective pockets 4b, 4b... And the lubricating oil collide almost at right angles, and not only the effect is obtained but also the opposite effect. turn into.

そのため、例えば図１に示すように外輪２や内輪３の端面に、保持器４の回転方向を識別する識別情報６を刻印しておけば、その回転方向に対応した保持器４を間違いなく玉軸受に組み付けることができ、かつ、その玉軸受をハウジングなどに組み込むことができる。具体的には、前記回転方向の識別情報としてその回転方向を示す矢印やその軸受や対応する保持器４の型番などの数字記号を用いることができる。   Therefore, for example, as shown in FIG. 1, if identification information 6 for identifying the rotation direction of the cage 4 is engraved on the end faces of the outer ring 2 and the inner ring 3, the cage 4 corresponding to the rotation direction is definitely attached to the ball. The ball bearing can be assembled into a housing or the like. Specifically, as the identification information of the rotation direction, an arrow indicating the rotation direction, a numerical symbol such as a bearing or a model number of the corresponding cage 4 can be used.

本発明に係る玉軸受１０の実施の一形態を示す周方向部分断面図である。1 is a partial circumferential sectional view showing an embodiment of a ball bearing 10 according to the present invention. 本発明に係る冠型樹脂保持器の実施の一形態を示す斜視図である。It is a perspective view showing one embodiment of a crown type resin retainer concerning the present invention. 図２のＡ部を示す部分拡大図である。It is the elements on larger scale which show the A section of FIG. 本発明に係る冠型樹脂保持器の他の実施の形態を示す部分拡大斜視図である。It is a partial expansion perspective view which shows other embodiment of the crown type resin retainer which concerns on this invention. 従来の玉軸受の一例を示す周方向部分断面図である。It is a circumferential direction fragmentary sectional view which shows an example of the conventional ball bearing. 従来の玉軸受で採用されている冠型樹脂保持器の一例を示す斜視図である。It is a perspective view which shows an example of the crown type resin retainer employ | adopted with the conventional ball bearing.

符号の説明Explanation of symbols

１０…玉軸受
１…内輪
２…外輪
３…ボール（転動体）
４…保持器
４ａ…保持器本体
４ｂ…ポケット
４ｄ…溝
４ｅ…弾性変形部材
６…回転方向識別情報 10 ... Ball bearing 1 ... Inner ring
2 ... Outer ring
3. Ball (rolling element)
DESCRIPTION OF SYMBOLS 4 ... Cage 4a ... Cage body 4b ... Pocket 4d ... Groove 4e ... Elastic deformation member 6 ... Rotation direction identification information

Claims (5)

内輪と外輪間で転動する複数のボールを保持するための玉軸受用保持器であって、リング状の保持器本体に前記各ボールをその端面側から収容するためのポケットを複数備えると共に、当該保持器本体の各ポケット間の端面形状を、隣接するポケット間で連続するように滑らかな曲面とし、前記ポケットの回転方向上流側の縁部をボール組み込み時に弾性変形可能としたことを特徴とする玉軸受用保持器。   A ball bearing retainer for retaining a plurality of balls that roll between an inner ring and an outer ring, the ring-shaped retainer body including a plurality of pockets for accommodating each of the balls from its end face side, The end face shape between each pocket of the cage body is a smooth curved surface so as to be continuous between adjacent pockets, and the edge on the upstream side in the rotation direction of the pocket is elastically deformable when the ball is incorporated. Ball bearing cage. 請求項１に記載の玉軸受用保持器において、
前記保持器本体を合成樹脂材料で形成したことを特徴とする玉軸受用保持器。 The ball bearing retainer according to claim 1,
A cage for ball bearings, wherein the cage body is formed of a synthetic resin material. 請求項１に記載の玉軸受用保持器において、
前記保持器本体の各ポケット間に溝部を形成し、当該溝部に前記各ポケット間の曲面形状を維持すべく弾性変形部材を嵌合したことを特徴とする玉軸受用保持器。 The ball bearing retainer according to claim 1,
A ball bearing cage, wherein a groove is formed between each pocket of the cage body, and an elastically deformable member is fitted in the groove to maintain the curved shape between the pockets. 請求項１〜３のいずれか１項に記載の玉軸受用保持器を回転自在に組み込んだことを特徴とする玉軸受。   A ball bearing in which the ball bearing retainer according to claim 1 is rotatably incorporated. 請求項４に記載の玉軸受において、前記外輪または内輪の端面に、前記保持器の回転方向を識別する識別情報を付したことを特徴とする玉軸受。   The ball bearing according to claim 4, wherein identification information for identifying a rotation direction of the cage is attached to an end face of the outer ring or the inner ring.
JP2006162411A 2006-06-12 2006-06-12 Cage for ball bearing and ball bearing using the same Pending JP2007332995A (en)

Priority Applications (1)

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JP2006162411A JP2007332995A (en) 2006-06-12 2006-06-12 Cage for ball bearing and ball bearing using the same

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Application Number Priority Date Filing Date Title
JP2006162411A JP2007332995A (en) 2006-06-12 2006-06-12 Cage for ball bearing and ball bearing using the same

Publications (1)

Publication Number Publication Date
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012043575A1 (en) * 2010-09-28 2012-04-05 Ntn株式会社 Fluid dynamic bearing device and assembly method thereof
US8534920B2 (en) 2008-04-22 2013-09-17 Jtekt Corporation Rolling bearing

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8534920B2 (en) 2008-04-22 2013-09-17 Jtekt Corporation Rolling bearing
WO2012043575A1 (en) * 2010-09-28 2012-04-05 Ntn株式会社 Fluid dynamic bearing device and assembly method thereof

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