WO2020162448A1 - Solid-lubricated roller bearing - Google Patents

Solid-lubricated roller bearing Download PDF

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Publication number
WO2020162448A1
WO2020162448A1 PCT/JP2020/004103 JP2020004103W WO2020162448A1 WO 2020162448 A1 WO2020162448 A1 WO 2020162448A1 JP 2020004103 W JP2020004103 W JP 2020004103W WO 2020162448 A1 WO2020162448 A1 WO 2020162448A1
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Prior art keywords
bearing
solid lubricant
solid
cage
diameter surface
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PCT/JP2020/004103
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French (fr)
Japanese (ja)
Inventor
理沙 久保
琢也 小津
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Ntn株式会社
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Publication of WO2020162448A1 publication Critical patent/WO2020162448A1/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
    • 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
    • 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
    • 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
    • F16C33/49—Cages for rollers or needles comb-shaped
    • 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
    • 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
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members

Definitions

  • the present invention relates to a rolling bearing equipped with a solid lubricant that is used in environments such as high temperatures and vacuum.
  • Solid lubrication rolling bearings are used in high temperature atmospheres and vacuum environments where grease or lubricating oil cannot be used as a lubricant.
  • Patent Document 1 as a component for separating the rolling element and the solid lubricant in the circumferential direction, a substantially U-shaped "regulating member" is adopted, but the component is asymmetrical in the axial direction of the bearing and is a separate component. Therefore, during operation, the bearing may slide in an unstable posture against the bearing ring or the sealing plate, and the smooth rotation of the bearing may be hindered.
  • Patent Document 2 although a cage having a substantially sheathed pear shape is adopted, the cage of the cage surrounds the rolling element and the solid lubricant in both the axial direction and the radial direction. It is difficult to make the diameter larger than that of the rolling element, and the wear life of the solid lubricant may be shortened.
  • the transfer of solid lubricant and the generation of lubricant powder mainly depend on the sliding of the rolling element and the solid lubricant, in order to make up for the lack of lubricant in the initial stage of operation, the rolling element should also be solid beforehand. It is necessary to form a lubricating film.
  • Another object of the present invention is to provide a structure capable of supplying various lubricants.
  • the present invention provides an inner ring, an outer ring, a plurality of rolling elements, at least one solid lubricant located between the rolling elements, and a rolling element and a solid lubricant in the circumferential direction.
  • the cage is composed of at least one annular portion and a plurality of column portions that extend in the axial direction from the annular portion as a starting point, and the solid lubricant is applied to the inner surface of the outer ring or the inner ring.
  • the configuration is such that at least one of the outer diameter surfaces is guided.
  • a solid-lubricated rolling bearing capable of supplying a sufficient amount of lubricant to the inside of the bearing at the initial stage of operation without hindering the rotation of the component parts of the bearing and limiting the shape and size of the solid lubricant is provided. Can be provided.
  • the solid lubricant also slides with the raceway ring, and a sufficient amount of lubricant is supplied to the inside of the bearing at the beginning of operation. Will be done. Further, by arranging the cage to be guided by at least one of the inner diameter surface of the outer ring and the outer diameter surface of the inner ring, the behavior of the cage during operation can be further stabilized.
  • the solid lubricant can be further increased.
  • the annular portion it is necessary to arrange the annular portion immediately below the inner diameter surface of the outer ring or directly above the outer diameter surface of the inner ring, which naturally limits the width of the solid lubricant.
  • the annular portion can be arranged outside the inner diameter surface of the outer ring and the outer diameter surface of the inner ring.
  • the behavior of the cage during operation is further stabilized by adopting a structure in which the cage is guided by the bearing ring that fixes the sealing plate.
  • the cage can be guided by both the bearing ring and the sealing plate.
  • the components of the bearing do not hinder the rotation, the shape and size of the solid lubricant are less likely to be limited, and a sufficient lubricant is supplied to the inside of the bearing at the initial stage of operation. As a result, it is possible to provide a solid-lubricated rolling bearing which has a long life and can be smoothly rotated.
  • FIG. 6 is a perspective view of the holder alone of FIG. 5.
  • FIG. 6 is a radial cross-sectional view of the bearing of FIG. 5.
  • 1 to 4 show an embodiment in which the present invention is applied to a sealed deep groove ball bearing.
  • FIG. 1 is a perspective view of a sealed deep groove ball bearing 1 to which the present invention is applied.
  • the outer ring 2 and the sealing plate 6 are shown by removing the front half of the drawing.
  • the bearing 1 includes an outer ring 2 having an outer raceway surface 2a on an inner peripheral surface, an inner race 3 having an inner raceway surface 3a on an outer peripheral surface, a rolling element 4, and a solid lubricant 7 located between the rolling elements 4. , A cage 5 that separates the rolling elements 4 in the circumferential direction, and an annular plate 8 having the same shape as the annular portion 5a on the axially opposite side of the annular portion 5a of the retainer 5, on both sides of the outer ring 2.
  • the sealing plate 6 is fixed.
  • the outer diameter end of the sealing plate 6 is press-fitted and fixed in the peripheral groove formed on the inner peripheral surface of the outer ring 2, and the inner diameter end thereof is close to the outer peripheral surface of the inner ring 3 to form a non-contact seal.
  • the seal plate 6 may be a contact seal type in which the inner diameter end of the seal plate 6 is in sliding contact with the outer peripheral surface of the inner ring 3.
  • the outer ring 2, the inner ring 3, the cage 5, and the annular plate 8 are made of a steel material, for example, martensitic stainless steel such as SUS440C.
  • the rolling element 4 is made of ceramics, and as the ceramics, for example, silicon nitride can be used. When the rolling elements 4 are not made of ceramics, it is preferable to form a coating film made of a solid lubricating material such as graphite on the surface thereof.
  • the sealing plate 6 is preferably made of a steel material, for example, austenitic stainless steel such as SUS304 having excellent corrosion resistance.
  • the cage 5 is composed of one annular portion 5a and three pillar portions 3b extending in the axial direction starting from the outer diameter side of the annular portion 5a.
  • the contact surface of the column portion 5b with the rolling element 4 has a concave surface shape for receiving the rolling element 4.
  • the outer diameter surface of the column portion 5b is a partial cylindrical surface corresponding to the inner diameter surface of the outer ring 2.
  • the solid lubricant 7 is made of, for example, a graphite-based, tungsten disulfide-based, or molybdenum disulfide-based solid lubricant material, has a plate shape curved along the shape of the bearing ring, and as shown in FIG. It extends beyond both ends of the faces 2a, 3a and its axial movement is limited by the annular portion 5a of the retainer 5 and the annular plate 8.
  • the outer diameter surface and the inner diameter surface of the solid lubricant 7 are guided by the inner diameter surface of the outer ring 2 and the outer diameter surface of the inner ring 3, respectively, and the guided surface of the cage 5 is the outer diameter surface of the column portion 5b.
  • the inner ring 3 is guided by the inner diameter surface of the outer ring 2 and is not in contact with the inner ring 3.
  • FIG. 4 is a side view of the bearing 1 of FIG. 1, and for convenience of explanation, the sealing plate 6 and the annular plate 8 on the front side of the drawing are omitted.
  • the guide surfaces of the solid lubricant 7 and the cage 5 are formed along the inner diameter surface of the outer ring 2 or the outer diameter surface of the inner ring 3.
  • FIG. 5 is a perspective view of a sealed deep groove ball bearing 9 to which the present invention is applied.
  • the outer ring 2 and the sealing plate 6 are shown with the front half of the paper surface removed.
  • the parts common to those of the embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be appropriately omitted.
  • the bearing 9 includes an outer ring 2 and an inner ring 3 made of stainless steel, a rolling element 4 made of ceramics, a solid lubricant 7 made of a graphite-based solid lubricating material located between the rolling elements 4, and a rolling element. It has a cage 5 made of stainless steel plate and spaced apart from each other in the circumferential direction.
  • the cage 5 is composed of one annular portion 5a and three pillar portions 5b extending in the axial direction from the inner diameter side of the annular portion 5a as a starting point.
  • the contact surface of the column portion 5b with the rolling element 4 has a planar shape facing the rolling element 4.
  • the inner diameter surface of the column portion 5b has a planar shape that faces the outer diameter surface of the inner ring 3.
  • the present invention is not limited to ball bearings, but can be applied to roller bearings.
  • the material and shape of the components are not limited to the above.
  • Steel balls made of stainless steel or bearing steel, tungsten disulfide-based or molybdenum disulfide-based solid lubricants, as well as cylindrical members were turned.
  • a machined cage can also be used.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Sealing Of Bearings (AREA)

Abstract

This invention addresses the problem of how to provide a configuration in which: constituent parts of a solid-lubricated roller bearing do not impede rotation; the shape and size of the solid lubricant are not easily limited; and an ample amount of lubricant can be supplied to the bearing interior at an initial stage of operation. This roller bearing has an inner race 3, and outer race 2, a plurality of rolling elements 4, at least one solid lubricant 7 positioned between the rolling elements 4, and a holder 5 that spaces the rolling elements 4 and the solid lubricant 7 apart in a circumferential direction. The holder 5 comprises at least one annular section 5a and a plurality of column sections 5b that extend in an axial direction from a starting point of the annular part 5a. The holder 5 is configured such that the radially outer surfaces of the column sections 5b are guided by the radially inner surface of the outer race 2 and the solid lubricant 7 is guided by at least one of the radially inner surface of the outer race 2 and the radially outer surface of the inner race 3.

Description

固体潤滑転がり軸受Solid lubrication rolling bearing
　この発明は、高温や真空等の環境下で使用する固体潤滑剤を備えた転がり軸受に関する。 The present invention relates to a rolling bearing equipped with a solid lubricant that is used in environments such as high temperatures and vacuum.
　固体潤滑転がり軸受は、潤滑剤としてグリースや潤滑油を使用することができない高温雰囲気や真空雰囲気等で使用される。 　Solid lubrication rolling bearings are used in high temperature atmospheres and vacuum environments where grease or lubricating oil cannot be used as a lubricant.
　この種の固体潤滑転がり軸受として、従来、特許文献１や特許文献２に記載のものが知られている。いずれの構成も２つの転動体の間に固体潤滑剤を介在させ、固体潤滑剤が転動体や軌道輪と摺動することで、潤滑剤が相手部品に移着または潤滑粉が生成されて軸受内部が潤滑される。 As this type of solid lubrication rolling bearing, those described in Patent Document 1 and Patent Document 2 are conventionally known. In either configuration, the solid lubricant is interposed between the two rolling elements, and the solid lubricant slides on the rolling elements or the bearing ring, whereby the lubricant is transferred to the mating component or lubricating powder is generated, and the bearing The inside is lubricated.
特許第６２７５４３３号公報Japanese Patent No. 6275433 特許第３５５０６８９号公報Japanese Patent No. 3550689
　ところで、特許文献1では、転動体および固体潤滑剤を周方向に離間する部品として、略コの字形の"規制部材"を採用しているが、軸受の軸方向に非対称形状かつ分離独立した部品であるため、運転中に不安定な姿勢で軌道輪や密封板と摺動し、軸受の円滑な回転を阻害する恐れがある。 By the way, in Patent Document 1, as a component for separating the rolling element and the solid lubricant in the circumferential direction, a substantially U-shaped "regulating member" is adopted, but the component is asymmetrical in the axial direction of the bearing and is a separate component. Therefore, during operation, the bearing may slide in an unstable posture against the bearing ring or the sealing plate, and the smooth rotation of the bearing may be hindered.
　また、特許文献２では、略さやえんどう形の保持器を採用しているが、保持器のポケットが転動体と固体潤滑剤を軸方向にも径方向にも取り囲む構成であるため、固体潤滑剤の直径を転動体よりも大きくすることが困難であり、固体潤滑剤の摩滅寿命が短くなる恐れがある。また、固体潤滑剤の移着や潤滑粉の生成は、主に転動体と固体潤滑剤の摺動に頼る構成であることから、運転初期の潤滑剤不足を補うため、転動体にも予め固体潤滑膜を成膜する必要がある。 Further, in Patent Document 2, although a cage having a substantially sheathed pear shape is adopted, the cage of the cage surrounds the rolling element and the solid lubricant in both the axial direction and the radial direction. It is difficult to make the diameter larger than that of the rolling element, and the wear life of the solid lubricant may be shortened. In addition, since the transfer of solid lubricant and the generation of lubricant powder mainly depend on the sliding of the rolling element and the solid lubricant, in order to make up for the lack of lubricant in the initial stage of operation, the rolling element should also be solid beforehand. It is necessary to form a lubricating film.
　そこで、この発明は、固体潤滑剤を備えた転がり軸受において、軸受の構成部品が回転を阻害することなく、また、固体潤滑剤の形状や大きさが制限されにくく、運転初期の軸受内部に潤沢な潤滑剤を供給可能な構成を提供しようとするものである。 Therefore, in the present invention, in a rolling bearing provided with a solid lubricant, the components of the bearing do not hinder the rotation, and the shape and size of the solid lubricant are less likely to be restricted, and the bearing inside the bearing at the beginning of operation is rich. Another object of the present invention is to provide a structure capable of supplying various lubricants.
　前記の課題を解決するために、この発明は、内輪と、外輪と、複数の転動体と、転動体の間に位置する少なくとも1つの固体潤滑剤と、転動体および固体潤滑剤を周方向に離間する保持器を有する転がり軸受において、保持器が少なくとも1つの円環部と、円環部を起点に軸方向に伸びる複数の柱部で構成され、固体潤滑剤を外輪の内径面または内輪の外径面の少なくとも一方で案内する構成を採用したものである。 In order to solve the above problems, the present invention provides an inner ring, an outer ring, a plurality of rolling elements, at least one solid lubricant located between the rolling elements, and a rolling element and a solid lubricant in the circumferential direction. In a rolling bearing having a cage that is separated from each other, the cage is composed of at least one annular portion and a plurality of column portions that extend in the axial direction from the annular portion as a starting point, and the solid lubricant is applied to the inner surface of the outer ring or the inner ring. The configuration is such that at least one of the outer diameter surfaces is guided.
　かかる構成により、軸受の構成部品が回転を阻害することなく、また、固体潤滑剤の形状や大きさが制限されにくく、運転初期の軸受内部に潤沢な潤滑剤を供給可能な固体潤滑転がり軸受を提供することができる。 With such a configuration, a solid-lubricated rolling bearing capable of supplying a sufficient amount of lubricant to the inside of the bearing at the initial stage of operation without hindering the rotation of the component parts of the bearing and limiting the shape and size of the solid lubricant is provided. Can be provided.
　すなわち、柱部が円環部によって結合された保持器を採用することで、特許文献1の構成で懸念される"規制部材"の不安定な挙動が抑制される。また、軌道面から離れた位置に円環部を設け、円環部から伸びる柱部だけを転動体および固体潤滑剤の間に挿入することにより、特許文献２のように固体潤滑剤の形状や大きさが大幅に制限されることがない。 That is, by adopting the cage in which the pillars are coupled by the annular portion, the unstable behavior of the "regulating member" which is a concern in the configuration of Patent Document 1 is suppressed. Further, by providing an annular portion at a position distant from the raceway surface and inserting only a column portion extending from the annular portion between the rolling element and the solid lubricant, the shape of the solid lubricant as in Patent Document 2 and The size is not significantly limited.
　さらに、固体潤滑剤を外輪の内径面または内輪の外径面の少なくとも一方で案内することにより、固体潤滑剤が軌道輪とも摺動する構成となり、運転初期の軸受内部に潤沢な潤滑剤が供給されることになる。
　また、保持器を外輪の内径面または内輪の外径面の少なくとも一方で案内する構成とすることにより、運転中の保持器の挙動を一層安定化させることができる。 Furthermore, by guiding the solid lubricant on at least one of the inner diameter surface of the outer ring or the outer diameter surface of the inner ring, the solid lubricant also slides with the raceway ring, and a sufficient amount of lubricant is supplied to the inside of the bearing at the beginning of operation. Will be done.
Further, by arranging the cage to be guided by at least one of the inner diameter surface of the outer ring and the outer diameter surface of the inner ring, the behavior of the cage during operation can be further stabilized.
　さらに、保持器の被案内面を柱部の外径面または内径面とすることにより、固体潤滑剤を一層大きくすることができる。円環部の外径面または内径面を案内する場合、円環部を外輪内径面の直下または内輪外径面の直上に配置する必要があり、自ずと固体潤滑剤の幅寸法が制限されるが、かかる構成によれば、外輪内径面や内輪外径面の外側に円環部を配置することができる。 Furthermore, by making the guided surface of the cage an outer diameter surface or an inner diameter surface of the column portion, the solid lubricant can be further increased. When guiding the outer diameter surface or inner diameter surface of the annular portion, it is necessary to arrange the annular portion immediately below the inner diameter surface of the outer ring or directly above the outer diameter surface of the inner ring, which naturally limits the width of the solid lubricant. According to this configuration, the annular portion can be arranged outside the inner diameter surface of the outer ring and the outer diameter surface of the inner ring.
　さらにまた、密封板を有する軸受において、密封板を固定する側の軌道輪で保持器を案内する構成とすることにより、運転中の保持器の挙動がより一層安定化する。密封板を有する軸受においては、保持器の端面と密封板の内壁が摺動し得るため、保持器は軌道輪と密封板の双方で案内され得るが、保持器を密封板を固定する側の軌道輪で案内することにより、保持器が回転輪と固定輪の双方に案内されることがなく、運転中の保持器の挙動がより一層安定化する。 Furthermore, in a bearing having a sealing plate, the behavior of the cage during operation is further stabilized by adopting a structure in which the cage is guided by the bearing ring that fixes the sealing plate. In a bearing having a sealing plate, since the end face of the cage and the inner wall of the sealing plate can slide, the cage can be guided by both the bearing ring and the sealing plate. By guiding with the bearing ring, the cage is not guided by both the rotating wheel and the fixed wheel, and the behavior of the cage during operation is further stabilized.
　以上のように、この発明によれば、軸受の構成部品が回転を阻害することなく、また、固体潤滑剤の形状や大きさが制限されにくく、運転初期の軸受内部に潤沢な潤滑剤を供給可能となり、長寿命で円滑に回転可能な固体潤滑転がり軸受を提供することができる。 As described above, according to the present invention, the components of the bearing do not hinder the rotation, the shape and size of the solid lubricant are less likely to be limited, and a sufficient lubricant is supplied to the inside of the bearing at the initial stage of operation. As a result, it is possible to provide a solid-lubricated rolling bearing which has a long life and can be smoothly rotated.
この発明を密封形深溝玉軸受に適用した実施形態を示す一部を除去した斜視図である。It is a perspective view with a part removed showing an embodiment in which the present invention is applied to a sealed deep groove ball bearing. 図１の軸受の保持器単体の斜視図である。It is a perspective view of the holder simple substance of the bearing of FIG. 図１の軸受の径方向断面図である。It is a radial direction sectional drawing of the bearing of FIG. 図１の軸受の側面図である。It is a side view of the bearing of FIG. この発明を密封型深溝玉軸受に適用した実施形態を示す一部を除去した斜視図である。It is the perspective view which removed one part which shows embodiment which applied this invention to the sealed deep groove ball bearing. 図５の保持器単体の斜視図である。FIG. 6 is a perspective view of the holder alone of FIG. 5. 図５の軸受の径方向断面図である。FIG. 6 is a radial cross-sectional view of the bearing of FIG. 5.
　以下、この発明の実施の形態を添付図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the accompanying drawings.
　図１～図４は、この発明を密封形深溝玉軸受に適用した実施形態を示している。 1 to 4 show an embodiment in which the present invention is applied to a sealed deep groove ball bearing.
　図１は、この発明を適用した密封形深溝玉軸受１の斜視図であり、便宜上、外輪２と密封板６は、紙面手前側半分を除去して表示している。 FIG. 1 is a perspective view of a sealed deep groove ball bearing 1 to which the present invention is applied. For convenience, the outer ring 2 and the sealing plate 6 are shown by removing the front half of the drawing.
　同軸受１は、内周面に外側軌道面２ａを有する外輪２と、外周面に内側軌道面３ａを有する内輪３と、転動体４と、転動体４の間に位置する固体潤滑剤７と、転動体４を周方向に離間する保持器５と、保持器５の円環部５ａの軸方向反対側に前記円環部５ａと同様形状の円環板８を備え、外輪２の両側に密封板６が固定されている。 The bearing 1 includes an outer ring 2 having an outer raceway surface 2a on an inner peripheral surface, an inner race 3 having an inner raceway surface 3a on an outer peripheral surface, a rolling element 4, and a solid lubricant 7 located between the rolling elements 4. , A cage 5 that separates the rolling elements 4 in the circumferential direction, and an annular plate 8 having the same shape as the annular portion 5a on the axially opposite side of the annular portion 5a of the retainer 5, on both sides of the outer ring 2. The sealing plate 6 is fixed.
　前記密封板６は、その外径端が外輪２の内周面に形成された周溝に圧入固定され、その内径端が内輪３の外周面に近接して非接触シールを形成している。なお、高温環境で使用されない軸受等では、密封板６として、その内径端を内輪３の外周面に摺接させる接触シールタイプを使用することもできる。 The outer diameter end of the sealing plate 6 is press-fitted and fixed in the peripheral groove formed on the inner peripheral surface of the outer ring 2, and the inner diameter end thereof is close to the outer peripheral surface of the inner ring 3 to form a non-contact seal. In a bearing or the like that is not used in a high temperature environment, the seal plate 6 may be a contact seal type in which the inner diameter end of the seal plate 6 is in sliding contact with the outer peripheral surface of the inner ring 3.
　外輪２、内輪３、保持器５および円環板８は、鋼材料、例えばＳＵＳ４４０Ｃ等のマルテンサイト系ステンレス鋼で形成される。転動体４は、セラミックスで形成され、セラミックスとしては、例えば窒化ケイ素を使用することができる。転動体４をセラミックスで形成しない場合には、その表面にグラファイト等の固体潤滑材料からなる被膜を形成するのが好ましい。密封板６は、鋼材料で形成し、例えば耐食性に優れるＳＵＳ３０４等のオーステナイト系ステンレス鋼で形成するのが好ましい。 The outer ring 2, the inner ring 3, the cage 5, and the annular plate 8 are made of a steel material, for example, martensitic stainless steel such as SUS440C. The rolling element 4 is made of ceramics, and as the ceramics, for example, silicon nitride can be used. When the rolling elements 4 are not made of ceramics, it is preferable to form a coating film made of a solid lubricating material such as graphite on the surface thereof. The sealing plate 6 is preferably made of a steel material, for example, austenitic stainless steel such as SUS304 having excellent corrosion resistance.
　保持器５は、１つの円環部５ａと、この円環部５ａの外径側を起点に軸方向に伸びる３つの柱部３ｂで構成されている。柱部５ｂの転動体４との接触面は、転動体４を受け入れる凹面形状である。また、柱部５ｂの外径面は、外輪２の内径面に対応した部分円筒面を成している。 The cage 5 is composed of one annular portion 5a and three pillar portions 3b extending in the axial direction starting from the outer diameter side of the annular portion 5a. The contact surface of the column portion 5b with the rolling element 4 has a concave surface shape for receiving the rolling element 4. The outer diameter surface of the column portion 5b is a partial cylindrical surface corresponding to the inner diameter surface of the outer ring 2.
　固体潤滑剤７は、例えば、グラファイト系、二硫化タングステン系や二硫化モリブデン系の固体潤滑剤材料からなり、軌道輪の形状に沿って湾曲した板状を呈し、図３に示すように、軌道面２ａ、３ａの両端を超えて延在し、軸方向の移動は、保持器５の円環部５ａと円環板８によって制限される。 The solid lubricant 7 is made of, for example, a graphite-based, tungsten disulfide-based, or molybdenum disulfide-based solid lubricant material, has a plate shape curved along the shape of the bearing ring, and as shown in FIG. It extends beyond both ends of the faces 2a, 3a and its axial movement is limited by the annular portion 5a of the retainer 5 and the annular plate 8.
　また、固体潤滑剤７の外径面と内径面は、それぞれ外輪２の内径面と内輪３の外径面で案内されるほか、保持器５の被案内面は、柱部５ｂの外径面となり、外輪２の内径面によって案内され、内輪３とは接触しない構成となっている。 The outer diameter surface and the inner diameter surface of the solid lubricant 7 are guided by the inner diameter surface of the outer ring 2 and the outer diameter surface of the inner ring 3, respectively, and the guided surface of the cage 5 is the outer diameter surface of the column portion 5b. Thus, the inner ring 3 is guided by the inner diameter surface of the outer ring 2 and is not in contact with the inner ring 3.
　図４は、図1の軸受１の側面図であり、説明の便宜上、紙面手前の密封板６および円環板８を省略している。ここで、固体潤滑剤７と保持器５の案内面は、外輪２の内径面または内輪３の外径面に沿った形状を成している。 FIG. 4 is a side view of the bearing 1 of FIG. 1, and for convenience of explanation, the sealing plate 6 and the annular plate 8 on the front side of the drawing are omitted. Here, the guide surfaces of the solid lubricant 7 and the cage 5 are formed along the inner diameter surface of the outer ring 2 or the outer diameter surface of the inner ring 3.
　次に、図５は、この発明を適用した密封形深溝玉軸受９の斜視図であり、便宜上、外輪２と密封板６は、紙面手前側半分を除去して表示している。図１～４に示した実施形態と共通する部位については同一の符号を付し、適宜説明を省略する。 Next, FIG. 5 is a perspective view of a sealed deep groove ball bearing 9 to which the present invention is applied. For convenience, the outer ring 2 and the sealing plate 6 are shown with the front half of the paper surface removed. The parts common to those of the embodiment shown in FIGS. 1 to 4 are designated by the same reference numerals, and the description thereof will be appropriately omitted.
　軸受９は軸受１と同様にステンレス鋼製の外輪２および内輪３と、セラミックス製の転動体４と、転動体４の間に位置するグラファイト系固体潤滑材料からなる固体潤滑剤７と、転動体４を周方向に離間するステンレス鋼板製の保持器５を有する。 Similar to the bearing 1, the bearing 9 includes an outer ring 2 and an inner ring 3 made of stainless steel, a rolling element 4 made of ceramics, a solid lubricant 7 made of a graphite-based solid lubricating material located between the rolling elements 4, and a rolling element. It has a cage 5 made of stainless steel plate and spaced apart from each other in the circumferential direction.
　保持器５は、１つの円環部５ａと、この円環部５ａの内径側を起点に軸方向に伸びる３つの柱部５ｂで構成されている。柱部５ｂの転動体４との接触面は、転動体４と対向する平面形状である。また、柱部５ｂの内径面は、内輪３の外径面に対向する平面形状である。 The cage 5 is composed of one annular portion 5a and three pillar portions 5b extending in the axial direction from the inner diameter side of the annular portion 5a as a starting point. The contact surface of the column portion 5b with the rolling element 4 has a planar shape facing the rolling element 4. The inner diameter surface of the column portion 5b has a planar shape that faces the outer diameter surface of the inner ring 3.
　なお、本発明は玉軸受に限定されるものではなく、ころ軸受にも適用することができる。また、構成部品の材質や形状も上記に限定されるものではなく、ステンレス鋼や軸受鋼製の鋼球、二硫化タングステン系や二硫化モリブデン系の固体潤滑剤のほか、円筒部材を旋削加工したもみ抜き保持器を採用することもできる。 The present invention is not limited to ball bearings, but can be applied to roller bearings. In addition, the material and shape of the components are not limited to the above. Steel balls made of stainless steel or bearing steel, tungsten disulfide-based or molybdenum disulfide-based solid lubricants, as well as cylindrical members were turned. A machined cage can also be used.
１　　：密封形深溝玉軸受
２　　：外輪
２ａ　：外側軌道面
３　　：内輪
３ａ　：内側軌道面
４　　：転動体
５　　：保持器
５ａ　：円環部
５ｂ　：柱部
６　　：密封板
７　　：固体潤滑剤
８　　：円環板
９　　：密封形深溝玉軸受 1: Sealed deep groove ball bearing 2: Outer ring 2a: Outer raceway surface 3: Inner ring 3a: Inner raceway surface 4: Rolling element 5: Cage 5a: Annular portion 5b: Column portion 6: Sealing plate 7: Solid lubricant 8 : Annular plate 9: Sealed deep groove ball bearing

Claims (4)

  1. 　内輪と、外輪と、複数の転動体と、転動体の間に位置する少なくとも１つの固体潤滑剤と、転動体および固体潤滑剤を周方向に離間する保持器を有する転がり軸受において、
    　保持器が少なくとも１つの円環部と、円環部を起点に軸方向に伸びる複数の柱部で構成され、固体潤滑剤を外輪の内径面または内輪の外径面の少なくとも一方で案内する固体潤滑転がり軸受。     In a rolling bearing having an inner ring, an outer ring, a plurality of rolling elements, at least one solid lubricant located between the rolling elements, and a retainer that separates the rolling element and the solid lubricant in the circumferential direction,
    A cage in which a cage is composed of at least one annular portion and a plurality of pillar portions extending in the axial direction from the annular portion as a starting point, and which guides the solid lubricant to at least one of the inner diameter surface of the outer ring or the outer diameter surface of the inner ring. Lubricated rolling bearing.
  2. 　保持器を外輪の内径面または内輪の外径面の少なくとも一方で案内する請求項１に記載の固体潤滑転がり軸受。 The solid lubricated rolling bearing according to claim 1, wherein the cage is guided by at least one of the inner diameter surface of the outer ring and the outer diameter surface of the inner ring.
  3. 　保持器の被案内面を柱部の外径面または内径面とした請求項２に記載の固体潤滑転がり軸受。 The solid lubricated rolling bearing according to claim 2, wherein the guided surface of the cage is the outer diameter surface or the inner diameter surface of the column portion.
  4. 　密封板を有する軸受において、密封板を固定する側の軌道輪で保持器を案内する請求項２または３記載の固体潤滑転がり軸受。 The solid lubricating rolling bearing according to claim 2 or 3, wherein in the bearing having the sealing plate, the cage is guided by the bearing ring on the side where the sealing plate is fixed.
PCT/JP2020/004103 2019-02-07 2020-02-04 Solid-lubricated roller bearing WO2020162448A1 (en)

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JP2019020534A JP2020128758A (en) 2019-02-07 2019-02-07 Solid lubrication rolling bearing
JP2019-020534 2019-02-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06509628A (en) * 1991-08-21 1994-10-27 バランスド　エンジンズ　インコーポレイテッド Bearings with lubricated spacers and non-lubricated spacers
JPH0949525A (en) * 1995-05-30 1997-02-18 Ntn Corp Solid lubrication roller bearing
JP2008064280A (en) * 2006-09-11 2008-03-21 Nsk Ltd Rolling bearing
JP2008267401A (en) * 2007-04-16 2008-11-06 Nsk Ltd Ball bearing
JP2018091399A (en) * 2016-12-02 2018-06-14 Ntn株式会社 Holder for rolling bearing, and rolling bearing including the same

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06509628A (en) * 1991-08-21 1994-10-27 バランスド　エンジンズ　インコーポレイテッド Bearings with lubricated spacers and non-lubricated spacers
JPH0949525A (en) * 1995-05-30 1997-02-18 Ntn Corp Solid lubrication roller bearing
JP2008064280A (en) * 2006-09-11 2008-03-21 Nsk Ltd Rolling bearing
JP2008267401A (en) * 2007-04-16 2008-11-06 Nsk Ltd Ball bearing
JP2018091399A (en) * 2016-12-02 2018-06-14 Ntn株式会社 Holder for rolling bearing, and rolling bearing including the same

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