JP2021116853A - Rolling bearing device - Google Patents

Rolling bearing device Download PDF

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JP2021116853A
JP2021116853A JP2020009979A JP2020009979A JP2021116853A JP 2021116853 A JP2021116853 A JP 2021116853A JP 2020009979 A JP2020009979 A JP 2020009979A JP 2020009979 A JP2020009979 A JP 2020009979A JP 2021116853 A JP2021116853 A JP 2021116853A
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annular
outer ring
rolling bearing
bearing device
cage
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拓矢 戸田
Takuya Toda
拓矢 戸田
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JTEKT Corp
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JTEKT Corp
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Abstract

To provide a technology that can lead a lubrication oil to a bearing interior effectively.SOLUTION: A rolling bearing device 1 includes: an outer member G; an inner ring 8; balls 10 disposed between the outer member and the inner ring 8; and an annular retainer 12 which rotatably retains the balls 10. The outer member G includes: an outer ring 6 having an outer ring raceway surface 6a at the inner periphery side; an annular part 20 which is provided at one axial side of the outer ring 6 and closes an annular opening L between the outer ring 6 and the inner ring 8; an oil supply passage 22 which opens on an annular space K between a spacer part 20 and the retainer 12; an annular guide part 26 which extends from an inner surface 20a of the spacer part 20 facing the annular space K to the bearing interior side.SELECTED DRAWING: Figure 2

Description

本発明は、転がり軸受装置に関する。 The present invention relates to a rolling bearing device.

工作機械の回転軸等の高速回転する回転軸に対しては、ｄｍｎ値が１００万以上の転がり軸受装置が用いられる。このような転がり軸受装置においては、軸受外部から給油し潤滑する給油方式が採用されることがある（例えば、特許文献１参照）。 For a rotating shaft that rotates at high speed, such as a rotating shaft of a machine tool, a rolling bearing device having a dmn value of 1 million or more is used. In such a rolling bearing device, a lubrication method in which lubrication is performed from the outside of the bearing may be adopted (see, for example, Patent Document 1).

特開２０１５−１１３９５６号公報Japanese Unexamined Patent Publication No. 2015-113956

図４は、軸受外部から給油する方式の転がり軸受装置を示す断面図である。
図４中、転がり軸受装置１００は、外輪１０１と、内輪１０２と、複数の玉１０３と、複数の玉１０３を保持する保持器１０４と、外輪１０１の軸方向両端に隣接配置された一対の間座１０５とを備える。
間座１０５には、給油路１０６が設けられている。給油路１０６は、軸受内部に開口しており、軸受内部に給油する。 FIG. 4 is a cross-sectional view showing a rolling bearing device in which oil is supplied from the outside of the bearing.
In FIG. 4, the rolling bearing device 100 is between an outer ring 101, an inner ring 102, a plurality of balls 103, a cage 104 holding the plurality of balls 103, and a pair of outer rings 101 arranged adjacent to each other in the axial direction. It has a seat 105.
The spacer 105 is provided with a refueling passage 106. The oil supply passage 106 is open inside the bearing and lubricates the inside of the bearing.

ここで、回転軸１０７及び内輪１０２が高速回転すると、軸受内部には、主として、回転軸１０７の軸中心周りに流れる気流（主流）が発生する。さらに、間座１０５と、複数の玉１０３及び保持器１０４側との間の環状空間では、主流に加えて２次流れが発生する。２次流れとは、主流に直交して生じる気流の流れ成分である。
この２次流れ（成分）は、図４に示すように、環状空間における保持器１０４側では気流に働く遠心力によって径方向外方側に向かって流れ、間座１０５側では径方向内方側に向って流れ、渦となって発生する。 Here, when the rotating shaft 107 and the inner ring 102 rotate at high speed, an air flow (mainstream) flowing around the center of the rotating shaft 107 is mainly generated inside the bearing. Further, in the annular space between the spacer 105 and the plurality of balls 103 and the cage 104 side, a secondary flow is generated in addition to the main flow. The secondary flow is a flow component of an air flow generated orthogonally to the mainstream.
As shown in FIG. 4, this secondary flow (component) flows outward in the radial direction due to the centrifugal force acting on the airflow on the cage 104 side in the annular space, and on the radial inward side on the spacer 105 side. It flows toward and occurs as a vortex.

このような２次流れの渦が発生しているときに軸受内部に給油すると、給油された潤滑油は、２次流れの渦の影響によって間座１０５の内側面を径方向内方側へ向かって伝い流れ、潤滑油が軸受外部側へ導かれてしまい、軸受内部に流入し難くなることがあった。 When the inside of the bearing is lubricated when such a vortex of the secondary flow is generated, the lubricated lubricating oil moves the inner surface of the spacer 105 inward in the radial direction due to the influence of the vortex of the secondary flow. Lubricating oil was sometimes guided to the outside of the bearing, making it difficult for it to flow into the bearing.

本発明は、このような問題に鑑みてなされたものであり、潤滑油を軸受内部に効果的に導くことができる技術の提供を目的とする。 The present invention has been made in view of such a problem, and an object of the present invention is to provide a technique capable of effectively guiding lubricating oil into a bearing.

（１）本発明は、外方部材と、内方部材と、前記外方部材と前記内方部材との間に配置された複数の転動体と、前記複数の転動体を回転自在に保持する環状の保持器と、を有する転がり軸受装置であって、前記外方部材は、内周側に軌道面を有する外輪と、前記外輪の軸方向一方側に設けられ前記外輪と前記内方部材との間の環状開口部を塞ぐ円環部と、前記円環部と前記保持器との間の環状空間に開口する給油路と、前記環状空間に面する前記円環部の内側面から軸受内部側へ延伸する環状誘導部と、を備える。 (1) The present invention rotatably holds an outer member, an inner member, a plurality of rolling elements arranged between the outer member and the inner member, and the plurality of rolling elements. A rolling bearing device having an annular cage, wherein the outer member includes an outer ring having a raceway surface on the inner peripheral side, and the outer ring and the inner member provided on one side in the axial direction of the outer ring. An annular portion that closes the annular opening between the two, an oil supply passage that opens in the annular space between the annular portion and the cage, and the inside of the bearing from the inner surface of the annular portion facing the annular space. It is provided with an annular guide portion extending to the side.

上記構成によれば、転がり軸受装置が、円環部の内側面から軸受内部側へ延伸する環状誘導部を備えるので、転がり軸受装置が回転することで円環部と保持器との間の環状空間に２次流れの渦が発生し、給油された潤滑油が円環部の内側面を径方向外方側から径方向内方側へ向かって伝い流れたとしても、環状誘導部によって、内側面を伝い流れる潤滑油を軸受内部側へ誘導することができる。これにより、潤滑油を軸受内部に効果的に導くことができる。 According to the above configuration, since the rolling bearing device includes an annular guide portion extending from the inner side surface of the annular portion to the inner side of the bearing, the rotation of the rolling bearing device causes the annular portion between the annular portion and the cage. Even if a secondary flow vortex is generated in the space and the lubricated lubricating oil flows along the inner surface of the annular portion from the outer side in the radial direction to the inner side in the radial direction, the annular guide portion causes the inner surface. Lubricating oil flowing along the side surface can be guided to the inside of the bearing. As a result, the lubricating oil can be effectively guided to the inside of the bearing.

（２）上記転がり軸受装置において、前記環状誘導部の先端は、前記保持器の外周面よりも径方向内方側に位置することが好ましい。
この場合、少なくとも、保持器の外周面よりも径方向内方側の範囲で円環部の内側面を伝い流れる潤滑油を軸受内部側へ誘導することができる。 (2) In the rolling bearing device, the tip of the annular guide portion is preferably located on the inner side in the radial direction with respect to the outer peripheral surface of the cage.
In this case, at least, the lubricating oil flowing along the inner surface of the annulus portion can be guided to the inner side of the bearing in the range on the inner side in the radial direction from the outer peripheral surface of the cage.

（３）上記転がり軸受装置において、前記環状誘導部の先端は、前記保持器の内周面と前記内方部材との間に位置していてもよい。
この場合、潤滑油を転動体の近傍まで誘導することができる。 (3) In the rolling bearing device, the tip of the annular guide portion may be located between the inner peripheral surface of the cage and the inner member.
In this case, the lubricating oil can be guided to the vicinity of the rolling element.

（４）また、上記転がり軸受装置において、前記円環部は、前記外輪と軸方向に隣接して配置された間座であることが好ましい。
この場合、環状空間内に設けられる環状誘導部の取付けが容易となる。 (4) Further, in the rolling bearing device, it is preferable that the annular portion is a spacer arranged so as to be adjacent to the outer ring in the axial direction.
In this case, it becomes easy to attach the annular guide portion provided in the annular space.

本発明によれば、潤滑油を軸受内部に効果的に導くことができる。 According to the present invention, the lubricating oil can be effectively guided to the inside of the bearing.

図１は、第１実施形態に係る転がり軸受装置の一例を示す断面図である。FIG. 1 is a cross-sectional view showing an example of a rolling bearing device according to the first embodiment. 図２は、図１中の要部を拡大した断面図である。FIG. 2 is an enlarged cross-sectional view of a main part in FIG. 図３は、第２実施形態に係る転がり軸受装置の要部断面図である。FIG. 3 is a cross-sectional view of a main part of the rolling bearing device according to the second embodiment. 図４は、軸受外部から給油する方式の転がり軸受装置を示す断面図である。FIG. 4 is a cross-sectional view showing a rolling bearing device in which oil is supplied from the outside of the bearing.

以下、本発明の好ましい実施形態について添付図面を参照しながら説明する。
〔転がり軸受装置の全体構成〕
図１は、第１実施形態に係る転がり軸受装置の一例を示す断面図である。
この転がり軸受装置１は、中心軸Ｃ周りに回転する回転軸Ｓを支持するためのものであり、転がり軸受２と、転がり軸受２を保持するハウジング４とを備えている。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
[Overall configuration of rolling bearing device]
FIG. 1 is a cross-sectional view showing an example of a rolling bearing device according to the first embodiment.
The rolling bearing device 1 is for supporting a rotating shaft S that rotates around a central axis C, and includes a rolling bearing 2 and a housing 4 that holds the rolling bearing 2.

転がり軸受２は、外輪６と、内輪８と、転動体である複数の玉１０と、複数の玉１０を保持する保持器１２とを備える。
外輪６は、軸受鋼や機械構造用合金鋼等を用いて形成された環状の部材である。外輪６の内周面には、複数の玉１０が転動する外輪軌道面６ａが設けられている。
内輪８は、軸受鋼や機械構造用合金鋼等を用いて形成された環状の部材であり、外輪６の径方向内方側に同心に配置されている。また、内輪８は、回転軸Ｓに一体回転可能に外嵌される。内輪８の外周面には、複数の玉１０が転動する内輪軌道面８ａが設けられている。 The rolling bearing 2 includes an outer ring 6, an inner ring 8, a plurality of balls 10 which are rolling elements, and a cage 12 for holding the plurality of balls 10.
The outer ring 6 is an annular member formed of bearing steel, alloy steel for machine structure, or the like. An outer ring raceway surface 6a on which a plurality of balls 10 roll is provided on the inner peripheral surface of the outer ring 6.
The inner ring 8 is an annular member formed of bearing steel, alloy steel for machine structure, or the like, and is concentrically arranged on the radial inward side of the outer ring 6. Further, the inner ring 8 is fitted on the rotating shaft S so as to be integrally rotatable. An inner ring raceway surface 8a on which a plurality of balls 10 roll is provided on the outer peripheral surface of the inner ring 8.

複数の玉１０は、軸受鋼等を用いて形成された部材であり、外輪軌道面６ａ及び内輪軌道面８ａの間に転動自在に介在している。これにより、内輪８及び外輪６は相対回転自在である。
保持器１２は、金属または樹脂等を用いて形成された環状の部材であり、外輪６と内輪８との間に配置され、複数の玉１０を周方向に保持する。
保持器１２には、周方向に沿って複数のポケット部１２ａが形成されている。ポケット部１２ａには、玉１０が収容される。保持器１２は、複数のポケット部１２ａにより複数の玉１０を保持する。保持器１２の外周面は、外輪６の内周面６ｄに摺接可能とされており、保持器１２は、外輪６によって径方向に位置決めされる。なお、保持器１２は、玉案内である場合もある。 The plurality of balls 10 are members formed of bearing steel or the like, and are rotatably interposed between the outer ring raceway surface 6a and the inner ring raceway surface 8a. As a result, the inner ring 8 and the outer ring 6 are relatively rotatable.
The cage 12 is an annular member formed of metal, resin, or the like, and is arranged between the outer ring 6 and the inner ring 8 to hold a plurality of balls 10 in the circumferential direction.
A plurality of pocket portions 12a are formed in the cage 12 along the circumferential direction. The ball 10 is housed in the pocket portion 12a. The cage 12 holds a plurality of balls 10 by the plurality of pocket portions 12a. The outer peripheral surface of the cage 12 can be slidably contacted with the inner peripheral surface 6d of the outer ring 6, and the cage 12 is positioned in the radial direction by the outer ring 6. The cage 12 may be a ball guide.

ハウジング４は、回転軸Ｓを支持する転がり軸受２を固定するための部材である。ハウジング４は、回転軸Ｓが差し込まれる貫通孔１７を有するハウジング本体１８と、貫通孔１７の軸方向一端に、ハウジング本体１８と一体に設けられた円環部２０とを有する。
円環部２０は、貫通孔１７の内周面１６よりも径方向内方へ突出した円環状の部分である。貫通孔１７の内周面１６には、転がり軸受２が設けられている。
円環部２０は、外輪６の軸方向一方側の端面６ｂに当接している。これによって、円環部２０は、内周面１６に設けられた転がり軸受２を軸方向に位置決めする。
また、円環部２０は、外輪６の内周面６ｄよりも径方向内方側へ突出しており、内輪８と外輪６との間の環状開口部Ｌを部分的に塞いでいる。 The housing 4 is a member for fixing the rolling bearing 2 that supports the rotating shaft S. The housing 4 has a housing main body 18 having a through hole 17 into which the rotation shaft S is inserted, and an annular portion 20 provided integrally with the housing main body 18 at one end in the axial direction of the through hole 17.
The annular portion 20 is an annular portion that protrudes inward in the radial direction from the inner peripheral surface 16 of the through hole 17. A rolling bearing 2 is provided on the inner peripheral surface 16 of the through hole 17.
The annulus portion 20 is in contact with the end surface 6b on one side in the axial direction of the outer ring 6. As a result, the annulus portion 20 positions the rolling bearing 2 provided on the inner peripheral surface 16 in the axial direction.
Further, the annular portion 20 projects radially inward from the inner peripheral surface 6d of the outer ring 6, and partially closes the annular opening L between the inner ring 8 and the outer ring 6.

貫通孔１７の内周面１６には、円環状の間座２４が圧入固定されている。間座２４は、外輪６の軸方向他方側の端面６ｃに当接しており、円環部２０との間で転がり軸受２を軸方向に挟持する。これにより、転がり軸受２はハウジング４に保持される。
本実施形態において、内輪８は、回転軸Ｓと一体に回転する内方部材を構成する。また、円環部２０、ハウジング本体１８、外輪９、及び間座２４は、内輪８の外方側に配置される外方部材Ｇを構成する。 An annular spacer 24 is press-fitted and fixed to the inner peripheral surface 16 of the through hole 17. The spacer 24 is in contact with the end surface 6c on the other side of the outer ring 6 in the axial direction, and sandwiches the rolling bearing 2 with the annular portion 20 in the axial direction. As a result, the rolling bearing 2 is held in the housing 4.
In the present embodiment, the inner ring 8 constitutes an inner member that rotates integrally with the rotation shaft S. Further, the ring portion 20, the housing body 18, the outer ring 9, and the spacer 24 constitute an outer member G arranged on the outer side of the inner ring 8.

外方部材Ｇには、給油路２２が形成されている。給油路２２は、ハウジング４の外周面１９と、外輪６及び内輪８の間の環状空間（後に説明する。）とを連通している。給油路２２の外周面１９側の開口には、潤滑油を給油するための給油装置が接続される。給油装置からの潤滑油は、給油路２２を通じて環状空間へ給油される。 An oil supply passage 22 is formed in the outer member G. The refueling passage 22 communicates the outer peripheral surface 19 of the housing 4 with the annular space (described later) between the outer ring 6 and the inner ring 8. A refueling device for refueling lubricating oil is connected to the opening on the outer peripheral surface 19 side of the refueling passage 22. The lubricating oil from the refueling device is refueled into the annular space through the refueling passage 22.

図２は、図１中の要部を拡大した断面図である。
転がり軸受装置１は、内輪８、外輪６、保持器１２、及び円環部２０によって画定される環状空間Ｋを有する。給油路２２の開口部２２ａは、環状空間Ｋに面する円環部２０の内側面２０ａに開口している。よって、給油路２２は、環状空間Ｋに開口している。 FIG. 2 is an enlarged cross-sectional view of a main part in FIG.
The rolling bearing device 1 has an annular space K defined by an inner ring 8, an outer ring 6, a cage 12, and an annular portion 20. The opening 22a of the oil supply passage 22 opens on the inner side surface 20a of the annular portion 20 facing the annular space K. Therefore, the refueling passage 22 is open to the annular space K.

給油路２２は、ハウジング本体１８に設けられてハウジング４の外周面１９と内周面１６とを連通する孔部２３ａと、円環部２０の内側面２０ａに設けられ、孔部２３ａの内周面１６側の開口から径方向内方へ向かって延びる溝部２３ｂとを含んで構成される。
溝部２３ｂは、孔部２３ａの内壁の一部を延長するように設けられている。溝部２３ｂは、外輪６の内周面６ｄよりも径方向内方側へ延びている。これにより、溝部２３ｂは、外輪６の端面６ｂとともに潤滑油が流通可能な空間を構成し、環状空間Ｋに開口する。
これにより、給油路２２は、外周面１９と環状空間Ｋとを連通する。 The oil supply passage 22 is provided in the hole portion 23a provided in the housing main body 18 and communicates the outer peripheral surface 19 and the inner peripheral surface 16 of the housing 4, and is provided in the inner side surface 20a of the annular portion 20 and is provided in the inner circumference of the hole portion 23a. It is configured to include a groove portion 23b extending inward in the radial direction from the opening on the surface 16 side.
The groove portion 23b is provided so as to extend a part of the inner wall of the hole portion 23a. The groove portion 23b extends inward in the radial direction from the inner peripheral surface 6d of the outer ring 6. As a result, the groove portion 23b forms a space through which the lubricating oil can flow together with the end surface 6b of the outer ring 6, and opens in the annular space K.
As a result, the refueling passage 22 communicates the outer peripheral surface 19 with the annular space K.

内側面２０ａには、環状誘導部２６が設けられている。
環状誘導部２６は、金属等で形成された環状の部材であり、内側面２０ａから軸受内部側（軸方向他方側）へ延伸している。
環状誘導部２６の先端２６ａは、鋭角な先細り形状とされている。
また、環状誘導部２６の先端２６ａは、保持器１２の端面１２ｂよりも軸方向他方側に位置している。よって、環状誘導部２６の先端２６ａは、保持器１２の内周面１２ｃと、内輪８の外周面８ｂとの間に位置している。
つまり、環状誘導部２６は、保持器１２と、内輪８との間の空間に差し込まれるように配置されている。 An annular guide portion 26 is provided on the inner surface surface 20a.
The annular guide portion 26 is an annular member made of metal or the like, and extends from the inner side surface 20a to the inner side of the bearing (the other side in the axial direction).
The tip 26a of the annular guide portion 26 has an acute-angled tapered shape.
Further, the tip 26a of the annular guide portion 26 is located on the other side in the axial direction from the end surface 12b of the cage 12. Therefore, the tip 26a of the annular guide portion 26 is located between the inner peripheral surface 12c of the cage 12 and the outer peripheral surface 8b of the inner ring 8.
That is, the annular guide portion 26 is arranged so as to be inserted into the space between the cage 12 and the inner ring 8.

以上のように、本実施形態の転がり軸受装置１は、円環部２０の内側面２０ａから軸受内部側へ延伸する環状誘導部２６を備えるので、転がり軸受装置１が回転することで環状空間Ｋに２次流れ（成分）の渦が発生し、給油路２２から給油された潤滑油が円環部２０の内側面２０ａを径方向外方側から径方向内方側へ向かって伝い流れたとしても、環状誘導部２６によって、内側面２０ａを伝い流れる潤滑油を軸受内部側へ誘導することができる。これにより、潤滑油を軸受内部に効果的に導くことができる。 As described above, since the rolling bearing device 1 of the present embodiment includes the annular guide portion 26 extending from the inner side surface 20a of the annular portion 20 to the inner side of the bearing, the rolling bearing device 1 rotates to cause the annular space K. Assuming that a vortex of a secondary flow (component) is generated in the bearing, and the lubricating oil supplied from the oil supply passage 22 flows along the inner side surface 20a of the annular portion 20 from the outer side in the radial direction to the inner side in the radial direction. Also, the annular guide portion 26 can guide the lubricating oil flowing along the inner side surface 20a to the inner side of the bearing. As a result, the lubricating oil can be effectively guided to the inside of the bearing.

また、本実施形態では、環状誘導部２６の先端２６ａが保持器１２の内周面１２ｃと内輪８の外周面８ｂとの間に位置しているので、円環部２０の内側面２０ａを伝い流れる潤滑油を玉１０及び内輪軌道面８ａの近傍まで誘導することができる。 Further, in the present embodiment, since the tip 26a of the annular guide portion 26 is located between the inner peripheral surface 12c of the cage 12 and the outer peripheral surface 8b of the inner ring 8, it travels along the inner surface 20a of the annular portion 20. The flowing lubricating oil can be guided to the vicinity of the ball 10 and the inner ring raceway surface 8a.

図３は、第２実施形態に係る転がり軸受装置１の要部断面図である。
本実施形態の転がり軸受装置１は、円環部２０がハウジング本体１８と別体となっている点、及び、給油路２２が外輪６に設けられた給油孔６ｅを含んで構成されている点において、第１実施形態と相違している。 FIG. 3 is a cross-sectional view of a main part of the rolling bearing device 1 according to the second embodiment.
The rolling bearing device 1 of the present embodiment is configured such that the annular portion 20 is separate from the housing main body 18 and the oil supply passage 22 includes an oil supply hole 6e provided in the outer ring 6. Is different from the first embodiment.

本実施形態の給油路２２は、ハウジング本体１８に設けられた孔部２３ａと、外輪６に設けられた給油孔６ｅとによって構成されている。
外輪６の給油孔６ｅは、外輪６の外周面６ｆと内周面６ｄとの間を連通する。
また、 孔部２３ａと、給油孔６ｅとは、互いに繋がっている。
これにより、給油路２２は、外周面１９（図１）と環状空間Ｋとを連通する。よって、潤滑油は、ハウジング４の孔部２３ａ及び外輪６の給油孔６ｅを通過して環状空間Ｋへ給油される。 The oil supply passage 22 of the present embodiment is composed of a hole portion 23a provided in the housing main body 18 and an oil supply hole 6e provided in the outer ring 6.
The oil supply hole 6e of the outer ring 6 communicates between the outer peripheral surface 6f and the inner peripheral surface 6d of the outer ring 6.
Further, the hole portion 23a and the refueling hole 6e are connected to each other.
As a result, the refueling passage 22 communicates the outer peripheral surface 19 (FIG. 1) with the annular space K. Therefore, the lubricating oil passes through the hole 23a of the housing 4 and the oil supply hole 6e of the outer ring 6 and is supplied to the annular space K.

本実施形態において、円環部２０は、上述のようにハウジング本体１８と別体であり、外輪６の軸方向一方側に隣接配置された間座である。
円環部２０は、貫通孔１７の内周面１６に圧入固定され外輪６の端面６ｂに当接している。 In the present embodiment, the annular portion 20 is a separate body from the housing main body 18 as described above, and is a spacer arranged adjacent to one side of the outer ring 6 in the axial direction.
The annulus portion 20 is press-fitted and fixed to the inner peripheral surface 16 of the through hole 17 and is in contact with the end surface 6b of the outer ring 6.

本実施形態において、環状誘導部２６の先端２６ａの径方向位置は、保持器１２の外周面１２ｄと内周面１２ｃとの間となっている。
この場合、環状誘導部２６の先端２６ａは、保持器１２の外周面１２ｄよりも径方向内方側に位置するので、少なくとも、保持器１２の外周面１２ｄよりも径方向内方側の範囲で円環部２０の内側面２０ａを伝い流れる潤滑油を軸受内部側へ誘導することができる。 In the present embodiment, the radial position of the tip 26a of the annular guide portion 26 is between the outer peripheral surface 12d and the inner peripheral surface 12c of the cage 12.
In this case, since the tip 26a of the annular guide portion 26 is located on the radial inward side of the outer peripheral surface 12d of the cage 12, at least in the range of the radial inward side of the outer peripheral surface 12d of the cage 12. Lubricating oil flowing along the inner side surface 20a of the annular portion 20 can be guided to the inner side of the bearing.

〔その他〕
なお、今回開示された実施形態はすべての点で例示であって制限的なものではないと考えられるべきである。
例えば、上記各実施形態では、外輪６と、円環部２０とを別体として設けた場合を例示したが、これらを一体としてもよい。
なお、上記各実施形態のように、円環部２０と、外輪６とを別体として設けた場合、環状空間Ｋ内に設けられる環状誘導部２６の取付けが容易となる。
また、上記各実施形態では、外方部材Ｇを、円環部２０、ハウジング本体１８、外輪６及び間座２４によって構成した場合を例示したが、外方部材Ｇは、少なくとも、円環部２０及び外輪６を含んでいればよい。
本発明の範囲は、特許請求の範囲によって示され、特許請求の範囲と均等の意味、及び範囲内でのすべての変更が含まれることが意図される。 〔others〕
It should be noted that the embodiments disclosed this time are exemplary in all respects and are not considered to be restrictive.
For example, in each of the above embodiments, the case where the outer ring 6 and the annulus portion 20 are provided as separate bodies is illustrated, but these may be integrated.
When the annular portion 20 and the outer ring 6 are provided as separate bodies as in each of the above embodiments, the annular guide portion 26 provided in the annular space K can be easily attached.
Further, in each of the above embodiments, the case where the outer member G is composed of the ring portion 20, the housing body 18, the outer ring 6 and the spacer 24 is illustrated, but the outer member G is at least the ring portion 20. And the outer ring 6 may be included.
The scope of the present invention is indicated by the scope of claims, and is intended to include meaning equivalent to the scope of claims and all modifications within the scope.

１ 転がり軸受装置 ２ 転がり軸受 ６ 外輪
６ａ 外輪軌道面 ６ｄ 内周面 ６ｅ 給油路
８ 内輪 １０ 玉 １２ 保持器
１２ｃ 内周面 １２ｄ 外周面
２０ 円環部 ２０ａ 内側面 ２２ 給油路
２６ 環状誘導部 ２６ａ 先端 Ｇ 外方部材
Ｋ 環状空間 Ｌ 環状開口部 1 Rolling bearing device 2 Rolling bearing 6 Outer ring 6a Outer ring raceway surface 6d Inner peripheral surface 6e Refueling path 8 Inner ring 10 balls 12 Cage 12c Inner peripheral surface 12d Outer surface 20 Circular part 20a Inner side surface 22 Refueling path 26 Ring guide part 26a Tip G outer member K annular space L annular opening

Claims (4)

外方部材と、内方部材と、前記外方部材と前記内方部材との間に配置された複数の転動体と、前記複数の転動体を回転自在に保持する環状の保持器と、を有する転がり軸受装置であって、
前記外方部材は、
内周側に軌道面を有する外輪と、
前記外輪の軸方向一方側に設けられ前記外輪と前記内方部材との間の環状開口部を塞ぐ円環部と、
前記円環部と前記保持器との間の環状空間に開口する給油路と、
前記環状空間に面する前記円環部の内側面から軸受内部側へ延伸する環状誘導部と、を備える
転がり軸受装置。 An outer member, an inner member, a plurality of rolling elements arranged between the outer member and the inner member, and an annular cage for rotatably holding the plurality of rolling elements. It is a rolling bearing device that has
The outer member is
An outer ring with a raceway on the inner circumference side,
An annular portion provided on one side of the outer ring in the axial direction and closing the annular opening between the outer ring and the inner member, and an annular portion.
An oil supply path that opens in the annular space between the annulus and the cage,
A rolling bearing device including an annular guide portion extending from the inner surface of the annular portion facing the annular space to the inner side of the bearing. 前記環状誘導部の先端は、前記保持器の外周面よりも径方向内方側に位置する
請求項１に記載の転がり軸受装置。 The rolling bearing device according to claim 1, wherein the tip of the annular guide portion is located on the inner side in the radial direction with respect to the outer peripheral surface of the cage. 前記環状誘導部の先端は、前記保持器の内周面と前記内方部材との間に位置する
請求項１又は請求項２に記載の転がり軸受装置。 The rolling bearing device according to claim 1 or 2, wherein the tip of the annular guide portion is located between the inner peripheral surface of the cage and the inner member. 前記円環部は、前記外輪と軸方向に隣接して配置された間座である
請求項１から請求項３のいずれか一項に記載の転がり軸受装置。
The rolling bearing device according to any one of claims 1 to 3, wherein the annular portion is a spacer arranged adjacent to the outer ring in the axial direction.
JP2020009979A 2020-01-24 2020-01-24 Rolling bearing device Pending JP2021116853A (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551122A (en) * 1978-10-02 1980-04-14 Skf Ind Trading & Dev Bearing for highhspeed rotation
JP2002089573A (en) * 2000-09-12 2002-03-27 Ntn Corp Structure and method for lubricating rolling bearing with air-oil
JP2011001990A (en) * 2009-06-17 2011-01-06 Jtekt Corp Roller bearing device and rolling bearing used therefor
JP2014025525A (en) * 2012-07-26 2014-02-06 Jtekt Corp Oil air lubrication type rolling bearing device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5551122A (en) * 1978-10-02 1980-04-14 Skf Ind Trading & Dev Bearing for highhspeed rotation
JP2002089573A (en) * 2000-09-12 2002-03-27 Ntn Corp Structure and method for lubricating rolling bearing with air-oil
JP2011001990A (en) * 2009-06-17 2011-01-06 Jtekt Corp Roller bearing device and rolling bearing used therefor
JP2014025525A (en) * 2012-07-26 2014-02-06 Jtekt Corp Oil air lubrication type rolling bearing device

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