JP2005180666A - Ball bearing cage and its ball bearing - Google Patents

Ball bearing cage and its ball bearing Download PDF

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Publication number
JP2005180666A
JP2005180666A JP2003426192A JP2003426192A JP2005180666A JP 2005180666 A JP2005180666 A JP 2005180666A JP 2003426192 A JP2003426192 A JP 2003426192A JP 2003426192 A JP2003426192 A JP 2003426192A JP 2005180666 A JP2005180666 A JP 2005180666A
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cage
pockets
ball
ball bearing
space
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Japanese (ja)
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Masahiko Satoda
雅彦 里田
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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Priority to JP2003426192A priority Critical patent/JP2005180666A/en
Publication of JP2005180666A publication Critical patent/JP2005180666A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/38—Ball cages
    • F16C33/41—Ball cages comb-shaped
    • F16C33/412—Massive or moulded comb cages, e.g. snap ball 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
    • 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)
  • Rolling Contact Bearings (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball bearing cage and its ball bearing capable of minimizing the stirring of lubricant by the cage, to prevent the temperature rise and bubbling caused by the stirring. <P>SOLUTION: This ball bearing cage 5 has a plurality of pockets 8 arranged in the circumferential direction and opened to the axial direction to rotatably and undroppably hold balls 4, on one axial face of a circular body 11. These pockets are constituted of recessed parts 10 formed on the circular body 11. In this cage 5, a part 15 between the adjacent pockets 8 has a contour free from the recessed part. A deformation promoting means 14 for promoting the elastic deformation is mounted between adjacent faces of the pockets. Various constitutions can be applied as the deformation promoting means 14, for example, that where the pocket 8 is formed of the recessed part 10 of the annular body and a pair of claw pieces 9, 9, and a space 11 between the claw pieces 9, 9 faced back to back of the adjacent pockets 8, 8 is filled with a space filling member 1. The space filling member 12 is, for example, independently mounted in the space 11 between the claw pieces 9, 9, and made out of an easy-deformable material such as rubber. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

この発明は、油浴潤滑下等で使用される深溝玉軸受やその他の玉軸受用保持器およびその玉軸受に関する。   The present invention relates to a deep groove ball bearing and other ball bearing cages used under oil bath lubrication and the like and the ball bearing thereof.

深溝玉軸受の保持器は、金属製と樹脂製に大別され、潤滑油の粘性が低い場合など、潤滑条件が厳しい場合は、自己潤滑性に優れる樹脂性保持器にする場合が多い。
図８に展開図で示すように、樹脂性保持器５５の場合、ボール５４を保持するために各ポケット５８の両側に爪片５９が形成されており、爪片５９の先端で構成されるポケット入口幅径ｄ１は、使用するボール５２の径ｄよりも小さい寸法とされている。保持器５５を組付ける際は、この爪片５９先端をボール５４で押し広げる方法で行われる。いわゆるスナップオン方式が取られる（例えば、特許文献１）
特開２０００−２６６０６２号公報 Deep groove ball bearing cages are broadly divided into metal and resin, and when the lubrication conditions are severe, such as when the viscosity of the lubricating oil is low, resin cages with excellent self-lubricating properties are often used.
As shown in a development view in FIG. 8, in the case of the resin retainer 55, claw pieces 59 are formed on both sides of each pocket 58 to hold the ball 54, and the pocket constituted by the tips of the claw pieces 59. The entrance width diameter d1 is smaller than the diameter d of the ball 52 to be used. When assembling the retainer 55, it is performed by a method of spreading the tip of the claw piece 59 with the ball 54. A so-called snap-on method is taken (for example, Patent Document 1).
JP 2000-266062 A

上記のように、保持器５５にはボール５４を組付けるために爪片５９がある程度自由に変形する必要があり、爪片５４の剛性を抑える必要がある。このため、隣合うボール５４間の爪片５９，５９間には、空間６１が存在する。
しかし、この空間６１があるため、この保持器５５が組付けられた深溝玉軸受が油浴潤滑等の潤滑油中で回転するときに、保持器５５の回転方向における断面形状ないし断面積の差が大きくなる。その結果、潤滑油を不要に攪拌し、温度上昇や油中に気泡の発生を誘発する。温度上昇は軸支持精度等の面から好ましくなく、また油中の気泡の発生は、潤滑面から好ましくない。 As described above, the claw piece 59 needs to be freely deformed to some extent in order to assemble the ball 54 to the retainer 55, and the rigidity of the claw piece 54 needs to be suppressed. For this reason, a space 61 exists between the claw pieces 59 between the adjacent balls 54.
However, since this space 61 exists, when the deep groove ball bearing in which the cage 55 is assembled rotates in lubricating oil such as oil bath lubrication, the difference in cross-sectional shape or cross-sectional area in the rotational direction of the cage 55 Becomes larger. As a result, the lubricating oil is agitated unnecessarily, inducing a temperature rise and generation of bubbles in the oil. An increase in temperature is undesirable from the standpoint of shaft support accuracy and the like, and generation of bubbles in the oil is not preferred from a lubrication surface.

この発明の目的は、保持器による潤滑油の攪拌を極力抑えて、攪拌による温度上昇や気泡の発生を防止することができ、かつボールを脱落不能に保持するポケット形状でありながらボールの組込みが可能な玉軸受用保持器およびその玉軸受を提供することである。   The object of the present invention is to suppress the stirring of the lubricating oil by the cage as much as possible, to prevent the temperature rise and the generation of bubbles due to the stirring, and to incorporate the ball while keeping the ball in a non-detachable manner. The object is to provide a ball bearing cage and a ball bearing thereof.

この発明の玉軸受用保持器は、環状体の軸方向の一方の面に、軸方向に向いて開口してボールを転動自在にかつ脱落不能に保持する複数のポケットを円周方向に並んで有し、これらポケットが前記環状体に形成された凹部により形成された樹脂製の玉軸受用保持器において、隣合うポケット間の部分を凹部がない輪郭とし、かつこの隣合うポケット間の部分に、これらポケットの隣り合う面間の弾性変形を容易化する変形容易化手段を設けたことを特徴とする。前記変形容易化手段は、隣合うポケット間の部分を凹部がない輪郭を略維持しながら弾性変形を容易とする手段である。   The ball bearing retainer according to the present invention has a plurality of pockets arranged in the circumferential direction on one surface of the annular body in the axial direction so as to open in the axial direction and hold the ball in a rollable and non-detachable manner. In the ball bearing retainer made of resin, in which these pockets are formed by recesses formed in the annular body, the portion between the adjacent pockets has a contour without a recess, and the portion between the adjacent pockets Further, a deformation facilitating means for facilitating elastic deformation between adjacent surfaces of these pockets is provided. The deformation facilitating means is a means for facilitating elastic deformation while substantially maintaining a contour having no recess in a portion between adjacent pockets.

この構成の保持器によると、隣合うポケット間の部分を凹部がない輪郭としたため、この保持器が組付けられた玉軸受が回転するときに、保持器の回転方向における断面形状や断面積の差が小さい。その結果、潤滑油の攪拌が極力抑えられ、攪拌による温度上昇や気泡の発生が防止される。また、隣合うポケット間の部分に前記変形容易化手段を設けたため、ボールを脱落不能に保持するポケット形状でありながら、隣合うポケット間の部分の弾性変形によって、ボールをポケット内に組み込むことができる。   According to the cage of this configuration, since the portion between adjacent pockets has a contour without a recess, when the ball bearing assembled with this cage rotates, the cross-sectional shape and cross-sectional area in the rotation direction of the cage The difference is small. As a result, the stirring of the lubricating oil is suppressed as much as possible, and the temperature rise and the generation of bubbles due to the stirring are prevented. Further, since the deformation facilitating means is provided in the portion between the adjacent pockets, the ball can be incorporated into the pocket by elastic deformation of the portion between the adjacent pockets while being in a pocket shape that keeps the ball from dropping off. it can.

この発明において、前記変形容易化手段は、隣合うポケット間に設けられたスリットであっても良い。このスリットは、隙間のない形状、つまりスリット形成面となる対向面が互いに接した形状であっても良い。
スリットが設けられていると、隣合うポケット間の部分が分割されて肉厚が薄くなるため、弾性変形が容易となり、ボールを脱落不能に保持するポケット形状であっても、ボールの組み込みが可能になる。また、スリットであれば、隣合うポケット間の部分を凹部がない輪郭とした形状を、あまり損なわずに済み、回転時の潤滑油の攪拌が抑えられる。 In this invention, the deformation facilitating means may be a slit provided between adjacent pockets. The slit may have a shape without a gap, that is, a shape in which opposing surfaces serving as slit forming surfaces are in contact with each other.
If a slit is provided, the part between adjacent pockets is divided and the wall thickness is reduced, which facilitates elastic deformation and allows the ball to be incorporated even if it has a pocket shape that prevents the ball from falling off. become. Moreover, if it is a slit, the shape which made the part between adjacent pockets the outline which does not have a recessed part does not need to be damaged so much, and stirring of the lubricating oil at the time of rotation can be suppressed.

この発明において、隣合うポケット間の部分を、これらポケット間で円周方向に連続しかつ断面形状が略変化のない平坦な壁部とし、前記変形容易化手段として、保持器の材質を、ボールをポケット側へ押し付けることでボールがポケット内へ入り込み可能に弾性変形する材質としても良い。この場合に、上記のように隣合うポケット間にスリットを設けても良い。
このように、保持器自体の材質を変形容易なものとすることで、隣合うポケット間の部分を円周方向に連続した平坦な形状の壁部としながら、ボールの組み込みを可能なものとすることができる。隣合うポケット間の部分を連続した平坦な壁部とすることで、保持器の回転方向における断面積の変化が小さく抑えられ、保持器による潤滑油の攪拌が抑えられる。 In this invention, a portion between adjacent pockets is a flat wall portion that is continuous in the circumferential direction between the pockets and has substantially no change in cross-sectional shape. It is good also as a material which elastically deforms so that a ball | bowl can enter into a pocket by pressing to a pocket side. In this case, a slit may be provided between adjacent pockets as described above.
In this way, by making the material of the cage itself easily deformable, the ball can be incorporated while the portion between the adjacent pockets is a flat wall portion continuous in the circumferential direction. be able to. By making the part between adjacent pockets into a continuous flat wall, the change in the cross-sectional area in the rotation direction of the cage is suppressed to a small level, and the stirring of the lubricating oil by the cage is suppressed.

保持器のポケット間に上記の平坦な壁部を設けながら、ボールがポケット内へ入り込み可能に弾性変形する材質の保持器とするには、保持器全体の材質を弾性変形し易いするものとする他に、保持器の材質を部分的に変えても良い。例えば、ポケット間の壁部を弾性変形し易い材質としても、また環状体をポケット底部等で弾性変形し易い材質としても良い。ポケット間の壁部を弾性変形し易い材質とする場合に、ポケット内面となる表面部の材質に比べて、その表面部の間の材質を弾性変形し易い材質としても良い。   In order to make the cage of a material that elastically deforms so that the ball can enter the pocket while providing the flat wall portion between the pockets of the cage, the material of the entire cage is easily elastically deformed. In addition, the material of the cage may be partially changed. For example, the wall between the pockets may be made of a material that is easily elastically deformed, and the annular body may be made of a material that is easily elastically deformed at the pocket bottom or the like. When the wall portion between the pockets is made of a material that is easily elastically deformed, the material between the surface portions may be made of a material that is easily elastically deformed as compared with the material of the surface portion serving as the inner surface of the pocket.

この発明において、前記ポケットが、前記環状体に形成された凹部と、前記環状体の各凹部の環状体周方向の両側に位置する一対の爪片により形成され、隣合うポケットの背を向き合う各爪片の間の空間が、空間埋め部材で埋められたものであっても良い。この場合は、これら爪片を設けて空間埋め部材空間を設けた構成が前記変形容易化手段となる。
この構成の保持器の場合、背を向き合う爪片間の空間を空間埋め部材で埋めたため、保持器の複雑な形状が補正され、この保持器が組付けられた玉軸受が回転するときに、保持器の回転方向における断面形状や断面積の差が小さくなる。その結果、潤滑油の攪拌が極力抑えられ、攪拌による温度上昇や気泡の発生が防止される。この保持器は、ポケットの両側に爪片を有しているため、従来の保持器と同じく、爪片の弾性変形によってボールをポケット内に組み込むことができる。空間埋め部材は、ボールをポケット内に組み込む前に保持器に取付けられるものであっても、ボールの組み込み後に保持器に取付けられるものであっても良い。ボール組み込み前に保持器に取付けられるものである場合は、空間埋め部材がボール押し込み時の爪片の弾性変形をできるだけ妨げないものとすることが必要である。 In the present invention, the pocket is formed by a recess formed in the annular body and a pair of claw pieces positioned on both sides of the annular body in the circumferential direction of the annular body, and each of the pockets facing each other facing the back. The space between the nail pieces may be filled with a space filling member. In this case, a configuration in which these claw pieces are provided to provide a space filling member space is the deformation facilitating means.
In the case of the cage of this configuration, since the space between the claw pieces facing each other is filled with the space filling member, the complicated shape of the cage is corrected, and when the ball bearing assembled with this cage rotates, The difference in cross-sectional shape and cross-sectional area in the rotation direction of the cage is reduced. As a result, the stirring of the lubricating oil is suppressed as much as possible, and the temperature rise and the generation of bubbles due to the stirring are prevented. Since this cage has claw pieces on both sides of the pocket, the ball can be incorporated into the pocket by elastic deformation of the claw pieces as in the conventional cage. The space filling member may be attached to the cage before the ball is incorporated into the pocket, or may be attached to the cage after the ball is incorporated. In the case where it is attached to the cage before the ball is assembled, it is necessary that the space filling member does not hinder the elastic deformation of the claw piece when the ball is pushed in as much as possible.

例えば、前記空間埋め部材は、前記各爪片間の空間に個別に設けられたものであって、前記爪片を構成する材質よりも変形の容易な材質からなるものとする。このような材質として、ゴムを用いても良く、また爪片よりも軟質の樹脂材料を用いても良い。
この構成の場合、空間埋め部材が容易に変形するため、ボール組込み前に保持器に空間埋め部材を取付けておいても、ボール組込み時に爪片が弾性変形できて、ボールの組込みが可能になる。 For example, the space filling member is provided individually in the space between the claw pieces, and is made of a material that is easier to deform than the material constituting the claw pieces. As such a material, rubber may be used, or a resin material softer than the nail piece may be used.
In this configuration, since the space filling member is easily deformed, even if the space filling member is attached to the cage before the ball is assembled, the claw pieces can be elastically deformed when the ball is assembled, and the ball can be incorporated. .

前記空間埋め部材は、上記のような個別品とする代わりに一体品としても良い。例えば前記空間埋め部材は、前記各爪片間の空間に嵌合する個別空間埋め部と、これら複数の個別空間埋め部を連結した連結部を有する一体の部品であって、この空間埋め部材は、前記ボールをポケット内に組込んだ後に前記各爪間の空間に嵌合可能なものとしても良い。
空間埋め部材が一体品の場合、その連結部の配置される空間が軸受内に必要となるが、ボール組込み後の保持器への組付け性が良い。また、空間埋め部材がボール組込み後に保持器へ組込むものであると、爪片の変形を考慮する必要がないため、空間埋め部材の材質は硬質のものであっても良い。 The space filling member may be an integrated product instead of the individual product as described above. For example, the space filling member is an integral part having an individual space filling portion that fits in a space between the claw pieces and a connecting portion that connects the plurality of individual space filling portions, and the space filling member is The ball may be fitted into the space between the claws after the ball is incorporated in the pocket.
In the case where the space filling member is an integral product, a space in which the connecting portion is disposed is required in the bearing, but the assembly to the cage after the ball is assembled is good. Moreover, since it is not necessary to consider the deformation | transformation of a nail | claw piece if a space filling member is what is built into a holder after ball | bowl incorporation, the material of a space filling member may be a hard thing.

この発明の玉軸受用保持器は、玉軸受一般に適用できるが、特に、深溝玉軸受用の保持器である場合に、空間埋め部材を設けることがより効果的となる。深溝玉軸受において、樹脂保持器とする場合は、ポケットの両側に上記のような一対の爪片が設けられた保持器形状とされることが多い。そのため、空間埋め部材を設けることによる上記の潤滑油攪拌抑制の作用が効果的に発揮される。   The ball bearing cage of the present invention can be applied to ball bearings in general. However, in the case of a cage for deep groove ball bearings, it is more effective to provide a space filling member. In a deep groove ball bearing, when a resin cage is used, the cage shape is often provided with a pair of claw pieces as described above on both sides of a pocket. Therefore, the above-described action of suppressing the stirring of the lubricating oil by providing the space filling member is effectively exhibited.

この発明の玉軸受は、内輪および外輪の軌道面間に複数のボールが介在し、これら複数のボールを保持する樹脂製の保持器を有し、前記保持器が、環状体の軸方向の一方の面に、軸方向に向いて開口してボールを転動自在にかつ脱落不能に保持する複数のポケットを円周方向に並んで有し、これらポケットが、前記環状体に形成された凹部により形成された玉軸受において、前記保持器の隣合うポケット間の部分を凹部がない輪郭とし、かつこの隣合うポケット間の部分に、これらポケットの隣り合う面間の弾性変形を容易化する変形容易化手段を設けたことを特徴とする。
この構成の玉軸受によると、保持器の隣合うポケット間の部分を凹部がない輪郭としたため、潤滑油の攪拌を抑制することができ、玉軸受の発熱が低減する。すなわち、軸受全体としてその温度上昇抑制等の効果が得られる。また、前記変形容易化手段を設けたため、ボールを脱落不能に保持するポケット形状でありながら、ボールをポケット内に組み込むことができる。 The ball bearing of the present invention includes a resin cage in which a plurality of balls are interposed between the raceways of the inner ring and the outer ring, and holds the plurality of balls. A plurality of pockets that are open in the axial direction and that hold the ball in a rollable and non-droppable manner are arranged in a circumferential direction, and these pockets are formed by recesses formed in the annular body. In the formed ball bearing, the portion between the adjacent pockets of the cage has a contour without a recess, and the portion between the adjacent pockets is easily deformable to facilitate elastic deformation between the adjacent surfaces of the pockets. The present invention is characterized in that an adjusting means is provided.
According to the ball bearing of this structure, since the part between the adjacent pockets of the cage has an outline without a recess, stirring of the lubricating oil can be suppressed, and heat generation of the ball bearing is reduced. That is, effects such as temperature rise suppression can be obtained as a whole bearing. In addition, since the deformation facilitating means is provided, the ball can be incorporated into the pocket while having a pocket shape that keeps the ball from dropping off.

この発明の玉軸受用保持器は、隣合うポケット間の部分を凹部がない輪郭としたため、保持器による潤滑油の攪拌を極力抑え、攪拌による温度上昇や気泡の発生を防止することができる。また、隣合うポケット間の部分に変形容易化手段を設けたため、ボールを脱落不能に保持するポケット形状でありながら、ボールの組み込みが可能になる。   In the ball bearing cage of the present invention, the portion between adjacent pockets has a contour without a recess, so that stirring of the lubricating oil by the cage can be suppressed as much as possible, and temperature rise and bubble generation due to stirring can be prevented. Further, since the means for facilitating the deformation is provided in the portion between the adjacent pockets, the ball can be incorporated even though the pocket shape holds the ball so that it cannot fall off.

この発明の第１の実施形態を図１ないし図３と共に説明する。この実施形態は深溝玉軸受に適用した例であり、また油潤滑で使用される例である。この玉軸受１は、内輪２と外輪３の軌道面２ａ，３ａ間に複数のボール４を介在させ、これらのボール４を保持する保持器５を設けたものである。外輪３には、内外輪２，３間の軸受空間の両端を密閉する一対のシール６，６が設けられている。シール６は、図示の例では金属製のシールド板からなる非接触シールとしてあるが、接触シールであっても良い。   A first embodiment of the present invention will be described with reference to FIGS. This embodiment is an example applied to a deep groove ball bearing and is an example used in oil lubrication. The ball bearing 1 includes a plurality of balls 4 interposed between raceway surfaces 2 a and 3 a of an inner ring 2 and an outer ring 3, and a cage 5 that holds these balls 4. The outer ring 3 is provided with a pair of seals 6 and 6 for sealing both ends of the bearing space between the inner and outer rings 2 and 3. The seal 6 is a non-contact seal made of a metal shield plate in the illustrated example, but may be a contact seal.

保持器５は樹脂製であり、いわゆる冠型のものとされている。図２に示すように、保持器５の保持器本体５Ａは、環状体７の軸方向の一方の面に、軸方向に向いて開口してボール４を転動自在にかつ脱落不能に保持する複数のポケット８を円周方向に並んで有する。ポケット８は等間隔とされている。これらポケット８は、環状体７に形成された凹部１０と、環状体７の各凹部１０の環状体周方向の両側に位置する一対の爪片９，９により形成されている。ポケット８の内面は、凹部１０および爪片９に渡って、球面状とされている。ポケット８の内面は、ボール４を転動自在にかつ脱落不能に保持可能な形状であれば良く、複数の曲面の組み合わせ形状であっても良い。ポケット８の両側の爪片９は、図１（Ｂ）に示すように、互いに先端が近づく形状とされ、爪片９，９間の入口径ｄ１は、ボール径ｄよりも小さくされている。   The cage 5 is made of resin and is a so-called crown type. As shown in FIG. 2, the cage body 5 </ b> A of the cage 5 opens on one axial surface of the annular body 7 in the axial direction to hold the ball 4 so that it can roll and cannot fall off. A plurality of pockets 8 are arranged in the circumferential direction. The pockets 8 are equally spaced. These pockets 8 are formed by a recess 10 formed in the annular body 7 and a pair of claw pieces 9, 9 positioned on both sides of each recess 10 of the annular body 7 in the circumferential direction of the annular body. The inner surface of the pocket 8 has a spherical shape across the recess 10 and the claw piece 9. The inner surface of the pocket 8 only needs to have a shape that can hold the ball 4 in a rollable and non-detachable manner, and may be a combined shape of a plurality of curved surfaces. As shown in FIG. 1B, the claw pieces 9 on both sides of the pocket 8 are shaped so that the tips approach each other, and the entrance diameter d1 between the claw pieces 9 and 9 is smaller than the ball diameter d.

図１（Ｂ）に示すように、この実施形態では、保持器５の保持器本体５Ａに対して、隣合うポケット８の背を向き合う各爪片９，９間の空間１１を空間埋め部材１２で埋めている。このように空間埋め部材１２で埋めることによって、隣合うポケット８間の部分１５が、凹部がない輪郭とされている。図３に示すように、空間埋め部材１２は、各爪片９間の空間１１に個別に設けられたものであって、保持器本体５Ａを構成する材質よりも変形の容易な材質からなる。例えば、空間埋め部材１２はゴム、または保持器５の材質よりも弾性係数の低い合成樹脂等の弾性体とされている。各空間埋め部材１２の形状は、背を向き合う各爪片９，９間の空間１１に略隙間無く嵌まり込む形状のものとされ、接着剤による接着、または圧入や射出成形等によって保持器本体５Ａに固定または射出成形される。空間埋め部材１２は、ボール４を保持器５に組み込むよりも前に保持器本体５Ａに対して取付けられる。
前記爪片９を設け、空間埋め部材１２で空間１１を埋めた構成要素により、変形容易化手段１４が構成される。 As shown in FIG. 1 (B), in this embodiment, a space filling member 12 is formed between the claw pieces 9 and 9 facing the backs of the adjacent pockets 8 with respect to the cage body 5A of the cage 5. Filled with. Thus, by filling with the space filling member 12, the part 15 between the adjacent pockets 8 is made into the outline without a recessed part. As shown in FIG. 3, the space filling member 12 is individually provided in the space 11 between the claw pieces 9, and is made of a material that is easier to deform than the material constituting the cage body 5 </ b> A. For example, the space filling member 12 is an elastic body such as rubber or a synthetic resin having a lower elastic coefficient than the material of the cage 5. The shape of each space filling member 12 is a shape that fits into the space 11 between the claw pieces 9 facing each other with almost no gap, and the cage body is bonded by an adhesive, or by press-fitting or injection molding. Fixed to 5A or injection molded. The space filling member 12 is attached to the cage main body 5 </ b> A before the ball 4 is incorporated into the cage 5.
The deformation facilitating means 14 is constituted by the components in which the claw pieces 9 are provided and the space 11 is filled with the space filling member 12.

この構成によると、背を向き合う各対の爪片９間の空間１１を空間埋め部材１２で埋めたため、保持器５の爪片９の突出による複雑な形状が補正され、保持器５が組付けられた玉軸受１が回転するときに、保持器５の回転方向における断面形状や断面積の差が小さくなる。その結果、潤滑油の攪拌が極力抑えられ、攪拌による温度上昇や気泡の発生が防止される。この保持器６は、ポケット８の両側に爪片９を有しているため、従来の保持器と同じく、爪片９の弾性変形によってボール４をポケット内に組み込むことができる。このとき、空間埋め部材１２は弾性体からなるため、爪片９の弾性変形をあまり妨げず、ボール４の組み込み性の低下が回避される。   According to this configuration, since the space 11 between each pair of claw pieces 9 facing each other is filled with the space filling member 12, the complicated shape due to the protrusion of the claw piece 9 of the cage 5 is corrected, and the cage 5 is assembled. When the ball bearing 1 is rotated, the difference in cross-sectional shape and cross-sectional area in the rotation direction of the cage 5 is reduced. As a result, the stirring of the lubricating oil is suppressed as much as possible, and the temperature rise and the generation of bubbles due to the stirring are prevented. Since the cage 6 has claw pieces 9 on both sides of the pocket 8, the ball 4 can be incorporated into the pocket by elastic deformation of the claw pieces 9 as in the conventional cage. At this time, since the space filling member 12 is made of an elastic body, the elastic deformation of the claw piece 9 is not hindered so much and the deterioration of the assemblability of the ball 4 is avoided.

図４，図５は、保持器５の変形例を示す。保持器本体５Ａは、図１ないし図３と共に前述した第１の実施形態のものと同じである。この例では、空間埋め部材２２が、背を向き合う各爪片９間の空間１１に嵌合する複数の個別空間埋め部２２ａと、これら複数の個別空間埋め部２２ａを連結したリング状の連結部２２ｂを有する一体の部品とされている。連結部２２ｂは、保持器本体５Ａの環状体７に対して、ポケット８を介して軸方向に対面するように設けられる。この空間埋め部材２２は、ボール４をポケット８内に組込んだ後に、各爪片９間の空間１１に嵌合可能なものとされている。空間埋め部材２２は、保持器本体５Ａに対して、接着剤による接着により固定され、または個別空間埋め部２２ａが爪片９間の空間に圧入されることで、保持器本体５Ａに固定される。個別空間埋め部２２ａの材質は特に限定れず、例えば保持器本体５Ａと同じ材質の樹脂であっても良い。また、圧入の容易のためにゴム材としても良い。   4 and 5 show a modification of the cage 5. The cage body 5A is the same as that of the first embodiment described above with reference to FIGS. In this example, the space filling member 22 is fitted in the space 11 between the claw pieces 9 facing each other, and a plurality of individual space filling portions 22a, and a ring-shaped connection portion connecting the plurality of individual space filling portions 22a. It is an integral part having 22b. The connecting portion 22b is provided to face the annular body 7 of the cage main body 5A in the axial direction via the pocket 8. The space filling member 22 can be fitted into the space 11 between the claw pieces 9 after the ball 4 is assembled in the pocket 8. The space filling member 22 is fixed to the cage body 5A by bonding with an adhesive, or the individual space filling portion 22a is press-fitted into the space between the claw pieces 9 to be fixed to the cage body 5A. . The material of the individual space filling portion 22a is not particularly limited, and for example, the same material as that of the cage body 5A may be used. Further, a rubber material may be used for easy press-fitting.

このように空間埋め部材２２を一体のものとした場合も、保持器５の爪片９の突出による複雑な形状が補正され、保持器５の円周方向における断面積の差が小さくなる。その結果、潤滑油の攪拌が極力抑えられ、攪拌による温度上昇や気泡の発生が防止される。この空間埋め部材２２は、ボール４を保持器５に組込んだ後に保持器５に取付けられるため、ボール４の組み込み作業性を低下させることがない。空間埋め部材２２の保持器本体５Ａへの取付作業についても、空間埋め部材２２が一体品であるため、容易に行える。   Even when the space filling member 22 is integrated as described above, the complicated shape due to the protrusion of the claw piece 9 of the cage 5 is corrected, and the difference in the cross-sectional area of the cage 5 in the circumferential direction is reduced. As a result, the stirring of the lubricating oil is suppressed as much as possible, and the temperature rise and the generation of bubbles due to the stirring are prevented. Since the space filling member 22 is attached to the cage 5 after the ball 4 is assembled into the cage 5, the assembling workability of the ball 4 is not deteriorated. The mounting operation of the space filling member 22 to the cage main body 5A can be easily performed because the space filling member 22 is an integrated product.

図６，図７は、この発明のさらに他の実施形態にかかる玉軸受用保持器５を示す。この保持器５は、環状体１１の軸方向の一方の面に、軸方向に向いて開口してボールを転動自在にかつ脱落不能に保持する複数のポケット６を円周方向に並んで有する樹脂製の玉軸受用保持器において、隣合うポケット８間の部分を、これらポケット８間で円周方向に連続しかつ断面形状が略変化のない平坦な壁部１３としたものである。ポケット８の内面形状は、球面状または複数種類の曲面の組み合わせ形状とされる。保持器５の材質は、ボール４をポケット８側へ押し付けることでボール４がポケット８内へ入り込み可能に弾性変形する材質とされている。上記ボール４のポケット８側への押し付けは、例えば軸方向とされる。   6 and 7 show a ball bearing retainer 5 according to still another embodiment of the present invention. This cage 5 has a plurality of pockets 6 arranged in the circumferential direction on one surface of the annular body 11 in the axial direction so as to open in the axial direction and hold the ball so that it can roll and cannot fall off. In the ball bearing cage made of resin, a portion between adjacent pockets 8 is a flat wall portion 13 that is continuous in the circumferential direction between the pockets 8 and has a substantially unchanged cross-sectional shape. The inner surface shape of the pocket 8 is a spherical shape or a combination shape of a plurality of types of curved surfaces. The cage 5 is made of a material that is elastically deformed so that the ball 4 can enter the pocket 8 by pressing the ball 4 toward the pocket 8. The ball 4 is pressed against the pocket 8 side, for example, in the axial direction.

保持器５のポケット８間に平坦形状の壁部１３を設けながら、ボール３がポケット８内へ入り込み可能に弾性変形する保持器５とするには、変形容易化手段として、保持器５の全体の材質を弾性変形し易いものとする他に、保持器５の材質を部分的に変えても良い。例えば、壁部１３を弾性変形し易い材質としても、また環状体１１をポケット８の底部等で弾性変形し易い材質としても良い。壁部１３を弾性変形し易い材質とする場合に、ポケット８の内面となる表面部の材質に比べて、内部の材質を弾性変形し易い材質としても良い。ポケット８の内面は、潤滑性や摩耗防止性に優れた材質の樹脂であることが望ましいが、内部の材質は摩耗や潤滑に影響しないため、ボール４の押し込みに対して変形し易い材質とすることが好ましい。   In order to make the cage 5 elastically deformable so that the ball 3 can enter the pocket 8 while providing the flat wall portion 13 between the pockets 8 of the cage 5, the entire cage 5 is used as a means for facilitating deformation. The material of the cage 5 may be partially changed, in addition to the material that is easily elastically deformed. For example, the wall 13 may be made of a material that is easily elastically deformed, and the annular body 11 may be made of a material that is easily elastically deformed at the bottom of the pocket 8 or the like. When the wall portion 13 is made of a material that is easily elastically deformed, the internal material may be made of a material that is easily elastically deformed as compared with the material of the surface portion serving as the inner surface of the pocket 8. The inner surface of the pocket 8 is preferably made of a resin excellent in lubricity and wear resistance, but the inner material does not affect the wear and lubrication, so that the inner surface of the pocket 8 is easily deformed when the ball 4 is pushed in. It is preferable.

この構成の保持器５は、隣合うポケット８間の部分を円周方向に連続した平坦な壁部１３としたため、上記各実施形態と同じく、保持器５の回転方向における断面積の変化が小さく抑えられ、保持器５による潤滑油の攪拌が抑えられる。   In the cage 5 having this configuration, since the portion between the adjacent pockets 8 is a flat wall portion 13 continuous in the circumferential direction, the change in the cross-sectional area in the rotation direction of the cage 5 is small as in the above embodiments. And the stirring of the lubricating oil by the cage 5 is suppressed.

図８は、この発明のさらに他の実施形態を示す。この実施形態は、図６，図７に示す実施形態において、保持器５の材質を弾性変形容易な材質とする代わりに、変形容易化手段として、隣合うポケット８間にスリット１６を設けたものである。その他の構成は図６，図７に示す実施形態と同じである。
スリット１６が設けられていると、隣合うポケット８間の部分１５が分割されて肉厚が薄くなるため、弾性変形が容易となる。そのため、ボール４を脱落不能に保持するポケット形状であっても、ボール４の組み込みが可能になる。また、スリット１６であれば、隣合うポケット８間の部分１５を凹部がない輪郭とした形状を、あまり損なわずに済み、回転時の潤滑油の攪拌が抑えられる。 FIG. 8 shows still another embodiment of the present invention. In this embodiment, in the embodiment shown in FIGS. 6 and 7, a slit 16 is provided between adjacent pockets 8 as a deformation facilitating means instead of using a material that can be easily elastically deformed as a material of the cage 5. It is. Other configurations are the same as those of the embodiment shown in FIGS.
When the slit 16 is provided, the portion 15 between the adjacent pockets 8 is divided and the wall thickness is reduced, so that elastic deformation is facilitated. Therefore, even if it is a pocket shape that holds the ball 4 so as not to drop off, the ball 4 can be incorporated. Moreover, if it is the slit 16, it is not necessary to lose much the shape which made the part 15 between the adjacent pockets 8 the outline without a recessed part, and stirring of the lubricating oil at the time of rotation is suppressed.

（Ａ）はこの発明の第１の実施形態にかかる玉軸受用保持器の部分断面図、（Ｂ）はその保持器の展開状態の部分断面図である。(A) is a fragmentary sectional view of the cage for ball bearings concerning a 1st embodiment of this invention, and (B) is a fragmentary sectional view of the deployment state of the cage. 同保持器の保持本体の斜視図である。It is a perspective view of the holding main body of the holder. 同保持器の空間埋め部材の組立過程を示す説明図である。It is explanatory drawing which shows the assembly process of the space filling member of the holder. この発明の他の実施形態にかかる保持器の展開状態の部分平面図である。It is a partial top view of the expansion | deployment state of the holder | retainer concerning other embodiment of this invention. 同保持器の空間埋め部材の取付過程の説明図である。It is explanatory drawing of the attachment process of the space filling member of the holder | retainer. この発明のさらに他の実施形態にかかる保持器の斜視図である。It is a perspective view of the holder | retainer concerning further another embodiment of this invention. 同保持器の展開状態の部分断面図である。It is a fragmentary sectional view of the unfolded state of the cage. この発明のさらに他の実施形態にかかる保持器の展開状態の部分断面図である。It is a fragmentary sectional view of the unfolded state of the cage concerning other embodiments of this invention. 従来例の展開状態の部分断面図である。It is a fragmentary sectional view of the expansion state of a prior art example.

符号の説明Explanation of symbols

１…玉軸受
２…内輪
３…外輪
４…ボール
５…保持器
５Ａ…保持器本体
７…環状体
８…ポケット
９…爪片
１０…凹部
１１…空間
１２…空間埋め部材
１３…壁部
１４…変形容易化手段
１５…ポケット間の部分
１６…スリット
２２…空間埋め部材
２２ａ…個別空間埋め部
２２ｂ…連結部
DESCRIPTION OF SYMBOLS 1 ... Ball bearing 2 ... Inner ring 3 ... Outer ring 4 ... Ball 5 ... Cage 5A ... Cage body 7 ... Ring body 8 ... Pocket 9 ... Claw piece 10 ... Recess 11 ... Space 12 ... Space filling member 13 ... Wall part 14 ... Deformation facilitating means 15 ... portion 16 between pockets ... slit 22 ... space filling member 22a ... individual space filling portion 22b ... connecting portion

Claims (8)

環状体の軸方向の一方の面に、軸方向に向いて開口してボールを転動自在にかつ脱落不能に保持する複数のポケットを円周方向に並んで有し、これらポケットが前記環状体に形成された凹部により形成された樹脂製の玉軸受用保持器において、
隣合うポケット間の部分を凹部がない輪郭とし、かつこの隣合うポケット間の部分に、これらポケットの隣り合う面間の弾性変形を容易化する変形容易化手段を設けたことを特徴とする玉軸受用保持器。 A plurality of pockets are formed on one surface in the axial direction of the annular body so as to open in the axial direction and hold the ball in a rollable and non-detachable manner along the circumferential direction. In the ball bearing cage made of resin formed by the recess formed in
A ball characterized in that a portion between adjacent pockets has a contour without a recess, and a deformation facilitating means for facilitating elastic deformation between adjacent surfaces of the pockets is provided in a portion between the adjacent pockets. Bearing cage. 請求項１において、前記変形容易化手段が、隣合うポケット間に設けられたスリットである玉軸受用保持器。   The ball bearing retainer according to claim 1, wherein the deformation facilitating means is a slit provided between adjacent pockets. 請求項１または請求項２において、隣合うポケット間の部分を、これらポケット間で円周方向に連続しかつ断面形状が略変化のない平坦な壁部とし、前記変形容易化手段が、保持器の材質を、ボールをポケット側へ押し付けることでボールがポケット内へ入り込み可能に弾性変形する材質としたことである玉軸受用保持器。   3. The part between adjacent pockets according to claim 1 or 2, wherein the portion between adjacent pockets is a flat wall portion that is continuous in the circumferential direction between the pockets and has substantially no change in cross-sectional shape. The ball bearing retainer is a material that is elastically deformed so that the ball can enter the pocket by pressing the ball toward the pocket. 請求項１において、前記ポケットが、前記環状体に形成された凹部と、前記環状体の各凹部の環状体周方向の両側に位置する一対の爪片により形成され、隣合うポケットの背を向き合う各爪片の間の空間が、空間埋め部材で埋められ、前記変形容易化手段が、これら爪片を設けて空間埋め部材空間を設けたものである玉軸受用保持器。   2. The pocket according to claim 1, wherein the pocket is formed by a recess formed in the annular body and a pair of claw pieces located on both sides of the annular body in the circumferential direction of each annular body, and faces the backs of adjacent pockets. A ball bearing retainer in which a space between each claw piece is filled with a space filling member, and the deformation facilitating means is provided with a space filling member space by providing these claw pieces. 請求項４において、前記空間埋め部材が、前記各爪片間の空間に個別に設けられたものであって、前記爪片を構成する材質よりも変形の容易な材質からなる玉軸受用保持器。   The ball bearing retainer according to claim 4, wherein the space filling member is individually provided in a space between the claw pieces, and is made of a material that is easier to deform than a material constituting the claw pieces. . 請求項４において、前記空間埋め部材が、前記各爪片間の空間に嵌合する個別空間埋め部と、これら複数の個別空間埋め部を連結した連結部を有する一体の部品であり、この空間埋め部材は、前記ボールをポケット内に組込んだ後に前記各爪間の空間に嵌合可能なものとした玉軸受用保持器。   5. The space filling member according to claim 4, wherein the space filling member is an integral part having an individual space filling portion that fits into a space between the claw pieces and a connecting portion that connects the plurality of individual space filling portions. The embedding member is a ball bearing retainer that can be fitted into a space between the claws after the ball is assembled in a pocket. 請求項１ないし請求項６のいずれか１項において、深溝玉軸受用の保持器である玉軸受用保持器。   7. The ball bearing cage according to claim 1, wherein the ball bearing cage is a cage for a deep groove ball bearing. 内輪および外輪の軌道面間に複数のボールが介在し、これら複数のボールを保持する樹脂製の保持器を有し、前記保持器が、環状体の軸方向の一方の面に、軸方向に向いて開口してボールを転動自在にかつ脱落不能に保持する複数のポケットを円周方向に並んで有し、これらポケットが、前記環状体に形成された凹部と、前記環状体の各凹部の環状体周方向の両側に位置する一対の爪片により形成された玉軸受において、
隣合うポケット間の部分を凹部がない輪郭とし、かつこの隣合うポケット間の部分に、これらポケットの隣り合う面間の弾性変形を容易化する変形容易化手段を設けたことを特徴とする玉軸受。 A plurality of balls are interposed between the raceways of the inner ring and the outer ring, and a resin cage is provided to hold the plurality of balls, and the cage is axially provided on one axial surface of the annular body. A plurality of pockets arranged in the circumferential direction so as to open and face the ball so that it can roll and cannot be dropped off, and these pockets are formed in the recesses of the annular body, and the recesses of the annular body In a ball bearing formed by a pair of claw pieces located on both sides of the annular body circumferential direction of
A ball characterized in that a portion between adjacent pockets has a contour without a recess, and a deformation facilitating means for facilitating elastic deformation between adjacent surfaces of the pockets is provided in a portion between the adjacent pockets. bearing.
JP2003426192A 2003-12-24 2003-12-24 Ball bearing cage and its ball bearing Pending JP2005180666A (en)

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Cited By (9)

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JP2007327514A (en) * 2006-06-06 2007-12-20 Nsk Ltd Ball bearing
WO2010150707A1 (en) * 2009-06-26 2010-12-29 Ntn株式会社 Synthetic resin holder for deep groove ball bearings, deep groove ball bearing, and gear supporting device
JP2011007286A (en) * 2009-06-26 2011-01-13 Ntn Corp Deep groove ball bearing and gear support device
JP2011021661A (en) * 2009-07-15 2011-02-03 Ntn Corp Synthetic resin holder for deep groove ball bearing, and deep groove ball bearing
US8534920B2 (en) 2008-04-22 2013-09-17 Jtekt Corporation Rolling bearing
JP2013245762A (en) * 2012-05-25 2013-12-09 Ntn Corp Synthetic resin cage and ball bearing
JP2015017710A (en) * 2014-10-30 2015-01-29 Ntn株式会社 Synthetic resin retainer and ball bearing
IT202000024403A1 (en) * 2020-10-16 2022-04-16 Skf Ab BEARING UNIT EQUIPPED WITH HIGH PERFORMANCE RETENTION DEVICE
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Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4582051B2 (en) * 2006-06-06 2010-11-17 日本精工株式会社 Ball bearing
JP2007327514A (en) * 2006-06-06 2007-12-20 Nsk Ltd Ball bearing
US8534920B2 (en) 2008-04-22 2013-09-17 Jtekt Corporation Rolling bearing
US8939044B2 (en) 2009-06-26 2015-01-27 Ntn Corporation Retainer made of synthetic resin for use in a deep groove ball bearing; deep groove ball bearing; and gear support device
WO2010150707A1 (en) * 2009-06-26 2010-12-29 Ntn株式会社 Synthetic resin holder for deep groove ball bearings, deep groove ball bearing, and gear supporting device
JP2011007286A (en) * 2009-06-26 2011-01-13 Ntn Corp Deep groove ball bearing and gear support device
EP2447557A1 (en) * 2009-06-26 2012-05-02 NTN Corporation Synthetic resin holder for deep groove ball bearings, deep groove ball bearing, and gear supporting device
CN102803767A (en) * 2009-06-26 2012-11-28 Ntn株式会社 Synthetic Resin Holder For Deep Groove Ball Bearings, Deep Groove Ball Bearing, And Gear Supporting Device
EP2447557A4 (en) * 2009-06-26 2013-11-06 Ntn Toyo Bearing Co Ltd Synthetic resin holder for deep groove ball bearings, deep groove ball bearing, and gear supporting device
JP2011021661A (en) * 2009-07-15 2011-02-03 Ntn Corp Synthetic resin holder for deep groove ball bearing, and deep groove ball bearing
JP2013245762A (en) * 2012-05-25 2013-12-09 Ntn Corp Synthetic resin cage and ball bearing
JP2015017710A (en) * 2014-10-30 2015-01-29 Ntn株式会社 Synthetic resin retainer and ball bearing
IT202000024403A1 (en) * 2020-10-16 2022-04-16 Skf Ab BEARING UNIT EQUIPPED WITH HIGH PERFORMANCE RETENTION DEVICE
US20220120318A1 (en) * 2020-10-16 2022-04-21 Aktiebolaget Skf Bearing unit having a high-performance retention device
US11835091B2 (en) * 2020-10-16 2023-12-05 Aktiebolaget Skf Bearing unit having a high-performance retention device
US20240077110A1 (en) * 2020-10-16 2024-03-07 Aktiebolaget Skf Bearing unit having a high-performance retention device
DE102022203851A1 (en) 2021-05-05 2022-11-10 Minebea Mitsumi Inc. Ball bearing and method of mounting a ball bearing
US11692588B2 (en) 2021-05-05 2023-07-04 Minebea Mitsumi, Inc. Ball bearing and method for mounting a ball bearing

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