JP2014185655A

JP2014185655A - Rolling bearing device

Info

Publication number: JP2014185655A
Application number: JP2013059484A
Authority: JP
Inventors: Yuki Shishihara; 祐樹獅子原
Original assignee: JTEKT Corp
Current assignee: JTEKT Corp
Priority date: 2013-03-22
Filing date: 2013-03-22
Publication date: 2014-10-02
Anticipated expiration: 2033-03-22
Also published as: JP6136421B2

Abstract

PROBLEM TO BE SOLVED: To provide a rolling bearing device which has an extremely simple configuration to supply lubricant from a lubricant storage part into a rolling bearing.SOLUTION: The rolling bearing device includes a rolling bearing 11 having a rotary ring 20, a fixed ring 30, and a plurality of rolling elements 41. On at least one end side of the fixed ring 30, a storage part structural member 50 is arranged in the state of being fixed to the side of a housing 2. The storage part structural member 50 has an opening 61 opening toward the end face of the fixed ring 30. On the storage part structural member 50, a passage member 70 is arranged, which forms a supply passage for lubricant from a lubricant storage part 60 to the end face of the fixed ring 30 and is permeable to the lubricant. The passage member 70 has a main part 71 arranged in the lubricant storage part 60, and a high-density front end part 72 formed integrally with the main part 71, having higher density than the main part 71 to enhance permeability to the lubricant, and contacting the end face of the fixed ring 30 through the opening 61 of the lubricant storage part 60.

Description

この発明は、転がり軸受と、その転がり軸受に対し潤滑剤を供給する潤滑剤供給部とを備えた転がり軸受装置に関する。 The present invention relates to a rolling bearing device including a rolling bearing and a lubricant supply unit that supplies a lubricant to the rolling bearing.

転がり軸受と、その転がり軸受に対し潤滑剤を供給する潤滑剤供給部とを備えた転がり軸受装置においては、例えば特許文献１に開示されている。
これにおいては、外輪の端面に接して設けられる外輪位置決め間座と、この外輪位置決め間座の内径面に嵌合される外向き溝形の潤滑剤溜り形成部品本体とからなる潤滑剤溜り形成部品内に潤滑剤が貯留される潤滑剤溜りが形成されている。
また、潤滑剤溜り形成部品の軸受隣接側の側壁部における外径端部から一体に延びて隙間形成部品が形成されている。
また、潤滑剤溜りから隙間形成部品の軸受軸方向の途中まで通油材が設置される。そして、通油材の毛細管現象等による通油作用によって、隙間形成部品の途中まで通油された潤滑油は、さらに隙間形成部品の先端部の幅の狭い隙間での毛細管現象により外輪の軌道面に供給される。 A rolling bearing device including a rolling bearing and a lubricant supply unit that supplies a lubricant to the rolling bearing is disclosed in Patent Document 1, for example.
In this case, a lubricant reservoir forming component comprising an outer ring positioning spacer provided in contact with an end surface of the outer ring and an outward groove-shaped lubricant reservoir forming component main body fitted to the inner diameter surface of the outer ring positioning spacer. A lubricant reservoir is formed in which the lubricant is stored.
Further, a gap forming part is formed so as to extend integrally from the outer diameter end of the side wall adjacent to the bearing of the lubricant reservoir forming part.
Further, an oil passing material is installed from the lubricant reservoir to the middle of the gap forming component in the bearing axial direction. Further, the lubricating oil that has been passed through the gap forming part by the oil passing action due to the capillary action of the oil passing material further causes the outer ring raceway surface by capillary action in the narrow gap at the tip of the gap forming part. To be supplied.

特開２００６−２２６４２７号公報JP 2006-226427 A

ところで、特許文献１に開示された転がり軸受装置においては、通油材の毛細管現象等による通油作用によって、隙間形成部品の途中まで通油された潤滑油は、さらに隙間形成部品の先端部の幅の狭い隙間での毛細管現象により外輪の軌道面に供給される構造上、隙間形成部品の先端部に対する幅の狭い隙間を好適に形成することが困難となることが予測される。
例えば、隙間形成部品の先端部の隙間が大きいと、潤滑剤を毛細管現象により外輪の軌道面に供給できなくなる場合が予測され、隙間が小さ過ぎると目詰まりが生じやすくなることが予測される。 By the way, in the rolling bearing device disclosed in Patent Document 1, the lubricating oil that has been passed to the middle of the gap forming part by the oil passing action due to the capillary phenomenon of the oil passing material is further added to the tip of the gap forming part. It is predicted that it will be difficult to suitably form a narrow gap with respect to the tip of the gap forming component due to the structure supplied to the raceway surface of the outer ring by the capillary phenomenon in the narrow gap.
For example, when the gap at the tip of the gap forming component is large, it is predicted that the lubricant cannot be supplied to the raceway surface of the outer ring due to a capillary phenomenon, and it is predicted that clogging is likely to occur when the gap is too small.

この発明の目的は、前記問題点に鑑み、極めて簡単な構成によって、潤滑剤貯留部の潤滑剤を転がり軸受内に供給することができる転がり軸受装置を提供することである。 In view of the above problems, an object of the present invention is to provide a rolling bearing device that can supply the lubricant in the lubricant reservoir into the rolling bearing with a very simple configuration.

前記課題を解決するために、この発明の請求項１に係る転がり軸受装置は、回転輪と、固定輪と、前記回転輪と固定輪との間の環状空間に転動可能に配設される複数の転動体とを有する転がり軸受を備え、前記固定輪の少なくとも一端側には、潤滑剤が貯留される潤滑剤貯留部を構成する貯留部構成部材が前記固定輪側に固定された状態で配設され、前記貯留部構成部材には、前記潤滑剤貯留部を前記固定輪の端面に向けて開口する開口部が形成され、前記貯留部構成部材には、前記潤滑剤貯留部から前記固定輪の端面までの間の潤滑剤の供給経路をなす経路部材が配設され、前記経路部材は、潤滑剤が浸透可能な部材によって形成されると共に、前記潤滑剤貯留部内に配設される主体部分と、前記主体部分に一体状に形成され、前記主体部分よりも高密度をなして潤滑剤の浸透性が高められ、かつ前記潤滑剤貯留部の開口部を通して前記固定輪の端面に接触する高密度先端部分と、を有していることを特徴とする。 In order to solve the above-mentioned problems, a rolling bearing device according to claim 1 of the present invention is arranged to be able to roll in a rotating wheel, a fixed wheel, and an annular space between the rotating wheel and the fixed wheel. A rolling bearing having a plurality of rolling elements is provided, and at least one end of the fixed ring is in a state in which a storage member constituting a lubricant storage part in which a lubricant is stored is fixed to the fixed ring side. And an opening that opens the lubricant reservoir toward the end surface of the fixed wheel is formed in the reservoir component, and the reservoir component is fixed from the lubricant reservoir to the fixed member. A path member forming a lubricant supply path to the end face of the ring is disposed, and the path member is formed of a member through which the lubricant can permeate and is disposed in the lubricant reservoir. And the main body portion formed integrally with the main body portion. A high-density tip portion that has a higher density than the lubricant storage portion and that contacts the end face of the fixed ring through the opening of the lubricant reservoir. .

請求項２に係る転がり軸受装置は、請求項１に記載の転がり軸受装置であって、経路部材の高密度先端部分は、固定輪の端面に押し当てられて軸方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分よりも高密度をなしていることを特徴とする。 A rolling bearing device according to claim 2 is the rolling bearing device according to claim 1, wherein the high-density tip portion of the path member is pressed against the end face of the fixed ring and compressed in the axial direction. The density is higher than that of the main part by the amount corresponding to the compression amount.

請求項３に係る転がり軸受装置は、請求項１又は２に記載の転がり軸受装置であって、経路部材の高密度先端部分は、潤滑剤貯留部の開口部で径方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分よりも高密度をなしていることを特徴とする。 A rolling bearing device according to a third aspect is the rolling bearing device according to the first or second aspect, wherein the high-density tip portion of the path member is compressed in the radial direction at the opening of the lubricant reservoir. Further, the density is higher than that of the main part by the amount corresponding to the compression amount.

請求項４に係る転がり軸受装置は、請求項１〜３のいずれか一項に記載の転がり軸受装置であって、固定輪の端面には環状凹部が形成され、前記環状凹部の底面に経路部材の高密度先端部分が接触することを特徴とする。 The rolling bearing device according to claim 4 is the rolling bearing device according to any one of claims 1 to 3, wherein an annular recess is formed on an end surface of the fixed ring, and a path member is formed on a bottom surface of the annular recess. It is characterized in that the high-density tip portion of the contact.

この発明によると、経路部材の主体部分には、潤滑剤貯留部内の潤滑剤が浸透される。
主体部分に浸透された潤滑剤は、主体部分に一体状に形成された高密度先端部分に浸透される。潤滑剤は、密度が低い部分に比べ密度が高い部分に浸透しやすいため、主体部分に浸透された潤滑剤は高密度先端部分に浸透される。
高密度先端部分は、潤滑剤貯留部の開口部を通して固定輪の端面に接触するため、高密度先端部分に浸透された潤滑剤は、固定輪の端面を伝って転がり軸受内に供給される。
すなわち、潤滑剤が浸透可能な部材によって形成された経路部材において、その主体部分を潤滑剤貯留部内に配設し、主体部分に一体状に形成された高密度先端部分を潤滑剤貯留部の開口部を通して固定輪の端面に接触させるという、極めて簡単な構成によって、潤滑剤貯留部の潤滑剤を転がり軸受内に良好に供給することができる。 According to this invention, the lubricant in the lubricant reservoir is infiltrated into the main portion of the path member.
The lubricant that has penetrated into the main portion penetrates into the high-density tip portion formed integrally with the main portion. Since the lubricant easily penetrates into a portion having a higher density than a portion having a low density, the lubricant that has penetrated into the main portion penetrates into the high-density tip portion.
Since the high-density tip portion contacts the end surface of the fixed ring through the opening of the lubricant reservoir, the lubricant that has penetrated into the high-density tip portion is supplied to the rolling bearing along the end surface of the fixed ring.
That is, in a path member formed by a member through which lubricant can permeate, its main portion is disposed in the lubricant reservoir, and the high-density tip portion formed integrally with the main portion is the opening of the lubricant reservoir. The lubricant in the lubricant reservoir can be satisfactorily supplied into the rolling bearing by an extremely simple configuration in which the end surface of the fixed ring is brought into contact with the roller through the portion.

この発明の実施例１に係る転がり軸受装置の軸方向断面図である。It is an axial sectional view of the rolling bearing device according to Embodiment 1 of the present invention. 同じく転がり軸受装置を拡大して示す軸方向断面図である。It is an axial direction sectional view which expands and shows a rolling bearing device similarly. 同じく要部を拡大して示す軸方向断面図である。It is an axial direction sectional view which expands and shows a principal part similarly.

この発明を実施するための形態について実施例にしたがって説明する。 A mode for carrying out the present invention will be described in accordance with an embodiment.

この発明の実施例１を図面にしたがって説明する。
図１に示すように、転がり軸受装置は、転がり軸受１１（この実施例１ではアンギュラ玉軸受）と、この転がり軸受１１に潤滑剤（グリース、潤滑油等）を供給する潤滑剤供給部４９とを備える。
図１と図２に示すように、転がり軸受１１は、回転軸１（例えば、工作機のスピンドル）の外周面に嵌込まれて配設される回転輪としての内輪２０と、この内輪２０の外周に環状空間を隔て、かつハウジング２に嵌込まれて配設される固定輪としての外輪３０と、内輪２０の外周面の内輪軌道面２２と、外輪３０の内周面の外輪軌道面３２との間の環状空間に保持器４５によって保持された状態で転動可能に配設された複数の転動体４１（この実施例１では玉）とを備える。 A first embodiment of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the rolling bearing device includes a rolling bearing 11 (angular ball bearing in the first embodiment), and a lubricant supply unit 49 that supplies a lubricant (grease, lubricating oil, etc.) to the rolling bearing 11. Is provided.
As shown in FIGS. 1 and 2, the rolling bearing 11 includes an inner ring 20 as a rotating wheel that is fitted and disposed on the outer peripheral surface of the rotary shaft 1 (for example, a spindle of a machine tool), and the inner ring 20. An outer ring 30 as a fixed ring that is disposed in the housing 2 with an annular space on the outer periphery, an inner ring raceway surface 22 on the outer peripheral surface of the inner ring 20, and an outer ring raceway surface 32 on the inner peripheral surface of the outer ring 30. And a plurality of rolling elements 41 (balls in the first embodiment) arranged so as to be able to roll while being held by the cage 45.

また、この実施例１において、外輪３０の内周面のうち、外輪軌道面３２の片側に形成された軌道肩部３３の内周面は、保持器４５の外周面に僅かな隙間をもって対向することで保持器４５を回転案内する保持器案内面３４が形成されている。
また、この実施例１において、外輪３０の一端面（保持器案内面３４が形成される側の端面）には環状凹部３５が形成され、この環状凹部３５の底面に対し後述する経路部材７０の高密度先端部分７２の先端接触部７３が押し当てられる。 Further, in the first embodiment, of the inner peripheral surface of the outer ring 30, the inner peripheral surface of the track shoulder portion 33 formed on one side of the outer ring raceway surface 32 faces the outer peripheral surface of the cage 45 with a slight gap. Thus, a cage guide surface 34 for rotating and guiding the cage 45 is formed.
Further, in the first embodiment, an annular recess 35 is formed on one end surface of the outer ring 30 (the end surface on the side where the cage guide surface 34 is formed), and a path member 70 to be described later is formed on the bottom surface of the annular recess 35. The tip contact portion 73 of the high-density tip portion 72 is pressed.

転がり軸受１１の外輪３０の少なくとも一端側には、潤滑剤供給部４９を構成する貯留部構成部材５０と経路部材７０とが配設されている。
この実施例１において、貯留部構成部材５０は、外輪間座５１と、貯留部構成体５５との二部品で構成されている。
図２に示すように、外輪間座５１は、外輪３０の一端面に隣接してハウジング２内に圧入固定される筒状部５２と、この筒状部５２の外側端部から径方向内方に環状に突出された向けて環状外壁部５３とを有して縦断面Ｌ字状に形成されている。また、環状外壁部５３の内径寸法は、内輪２０の端部に隣接して配設された内輪間座２５の外径寸法よりも適宜に大きく設定されている。 At least one end side of the outer ring 30 of the rolling bearing 11 is provided with a storage portion constituting member 50 and a path member 70 that constitute the lubricant supply portion 49.
In the first embodiment, the reservoir component member 50 is composed of two parts, an outer ring spacer 51 and a reservoir component 55.
As shown in FIG. 2, the outer ring spacer 51 includes a cylindrical portion 52 that is press-fitted and fixed in the housing 2 adjacent to one end surface of the outer ring 30, and a radially inward portion from the outer end portion of the cylindrical portion 52. And having an annular outer wall portion 53 that protrudes in an annular shape, and is formed in an L-shaped longitudinal section. The inner diameter dimension of the annular outer wall portion 53 is appropriately set larger than the outer diameter dimension of the inner ring spacer 25 disposed adjacent to the end of the inner ring 20.

図２に示すように、貯留部構成体５５は、外輪間座５１と協働して潤滑剤貯留部６０を構成するものであり、外輪間座５１の筒状部５６の内周面に圧入固定されて外輪間座５１の環状外壁部５３の内側面に接して配置される固定用環状壁部５７と、この固定用環状壁部５７の内径端から外輪間座５１の筒状部５２と平行状に延出された筒状部５６と、この筒状部５６の延出端部から径方向外方へ突出された開口用環状壁部５８とを有して縦断面Ｕ字状をなしている。
また、貯留部構成体５５の筒状部５６の内径寸法は、外輪間座５１の環状外壁部５３の内径寸法とほぼ同じで、内輪間座２５の外径寸法よりも適宜に大きく設定されている。
また、開口用環状壁部５８の外径寸法は、外輪間座５１の筒状部５２の内径寸法よりも適宜に小さく設定され、開口用環状壁部５８の外周面と、外輪間座５１の筒状部５２の内周面との間には、潤滑剤貯留部６０を外輪３０の環状凹部３５の底面に向けて環状に開口させる開口部６１が形成されている。 As shown in FIG. 2, the reservoir structure 55 constitutes a lubricant reservoir 60 in cooperation with the outer ring spacer 51, and is press-fitted into the inner peripheral surface of the cylindrical portion 56 of the outer ring spacer 51. A fixed annular wall portion 57 that is fixed and disposed in contact with the inner surface of the annular outer wall portion 53 of the outer ring spacer 51, and a cylindrical portion 52 of the outer ring spacer 51 that extends from the inner diameter end of the fixed annular wall portion 57. A cylindrical section 56 extending in parallel and an opening annular wall 58 projecting radially outward from the extending end of the cylindrical section 56 have a U-shaped longitudinal section. ing.
Further, the inner diameter dimension of the cylindrical portion 56 of the storage portion constituting body 55 is substantially the same as the inner diameter dimension of the annular outer wall portion 53 of the outer ring spacer 51 and is appropriately set larger than the outer diameter dimension of the inner ring spacer 25. Yes.
Further, the outer diameter of the opening annular wall 58 is set to be appropriately smaller than the inner diameter of the cylindrical portion 52 of the outer ring spacer 51, and the outer peripheral surface of the opening annular wall 58 and the outer ring spacer 51. Between the inner peripheral surface of the cylindrical part 52, an opening 61 is formed that opens the lubricant reservoir 60 in an annular shape toward the bottom surface of the annular recess 35 of the outer ring 30.

外輪間座５１と貯留部構成体５５との二部品で構成される貯留部構成部材５０には、潤滑剤貯留部６０から外輪３０端面の環状凹部３５の底面までの間の潤滑剤の供給経路をなす経路部材７０が配設されている。
経路部材７０は、潤滑剤が浸透可能な部材（例えば、フェルト等の繊維、連続気泡を有する多孔質樹脂（連続気泡の発泡体）、繊維を樹脂でバインド成形した繊維材料等）によって形成されている。
この経路部材７０は、潤滑剤貯留部６０内に配設され、かつ周方向に連続して筒状をなす主体部分７１と、この主体部分７１の先端側に一体連続状をなして筒状に形成されると共に、主体部分７１よりも高密度をなして潤滑剤の浸透性が高められた高密度先端部分７２とを有している。そして、高密度先端部分７２は、潤滑剤貯留部６０の開口部６１を通して外輪３０端面の環状凹部３５の底面に押し当てられる。 The storage portion constituting member 50 constituted by two parts of the outer ring spacer 51 and the storage portion constituting body 55 includes a lubricant supply path from the lubricant storage portion 60 to the bottom surface of the annular recess 35 on the end surface of the outer ring 30. A path member 70 is provided.
The path member 70 is formed of a member (for example, a fiber such as felt, a porous resin having open cells (open cell foam), a fiber material in which fibers are bind-molded with a resin, or the like) through which a lubricant can permeate. Yes.
The path member 70 is disposed in the lubricant reservoir 60 and is continuously cylindrical in the circumferential direction. The path member 70 is integrally formed on the distal end side of the main body portion 71 so as to be cylindrical. It has a high-density tip portion 72 that is formed and has a higher density than the main portion 71 and has improved lubricant permeability. Then, the high-density tip 72 is pressed against the bottom surface of the annular recess 35 on the end surface of the outer ring 30 through the opening 61 of the lubricant reservoir 60.

この実施例１において、図３に示すように、経路部材７０の高密度先端部分７２は、その先端接触部７３が、外輪３０端面の環状凹部３５のに押し当てられて軸方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分７１よりも高密度をなしている。
また、高密度先端部分７２は、潤滑剤貯留部６０の開口部６１で貯留部構成体５５の開口用環状壁部５８の外周面に押圧されることによって径方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分７１よりも高密度をなしている。 In the first embodiment, as shown in FIG. 3, the high-density tip portion 72 of the path member 70 is compressed in the axial direction by the tip contact portion 73 being pressed against the annular recess 35 on the end surface of the outer ring 30. Thus, the density is higher than that of the main portion 71 by an amount corresponding to the compression amount.
The high-density tip 72 is compressed in the radial direction by being pressed against the outer peripheral surface of the opening annular wall 58 of the reservoir structure 55 by the opening 61 of the lubricant reservoir 60. The density is higher than that of the main portion 71 by the amount corresponding to the compression amount.

また、図３に示すように、外輪３０端面の環状凹部３５の底面と、経路部材７０の高密度先端部分７２の内周面と、貯留部構成体５５の開口用環状壁部５８とによって囲まれた空間部を潤滑剤溜まり部８０として構成し、この潤滑剤溜まり部８０に対し、グリース等の粘性が高い潤滑剤８１を充填することが望ましい。すなわち、潤滑剤溜まり部８０は、外輪３０端面の環状凹部３５の底面と、経路部材７０の高密度先端部分７２の内周面と、貯留部構成体５５の開口用環状壁部５８とによって囲まれた空間部に構成されるため、潤滑剤８１の粘度が低いと潤滑剤溜まり部８０から流出しやすくなるが、グリース等の粘性が高い潤滑剤８１を用いることによって、潤滑剤溜まり部８０に潤滑剤８１が良好に保留される。 Also, as shown in FIG. 3, the outer ring 30 is surrounded by the bottom surface of the annular recess 35 on the end surface, the inner peripheral surface of the high-density tip portion 72 of the path member 70, and the opening annular wall portion 58 of the storage portion constituting body 55. It is desirable to form the space portion as a lubricant reservoir portion 80 and fill the lubricant reservoir portion 80 with a lubricant 81 having a high viscosity such as grease. That is, the lubricant reservoir 80 is surrounded by the bottom surface of the annular recess 35 on the end surface of the outer ring 30, the inner peripheral surface of the high-density distal end portion 72 of the path member 70, and the opening annular wall 58 of the reservoir structure 55. Therefore, if the viscosity of the lubricant 81 is low, the lubricant 81 tends to flow out from the lubricant reservoir 80. However, by using the lubricant 81 having a high viscosity such as grease, the lubricant reservoir 80 Lubricant 81 is well retained.

この実施例１に係る転がり軸受装置は上述したように構成される。
したがって、図２に示すように、経路部材７０の主体部分７１は、潤滑剤６２が貯留された潤滑剤貯留部６０内に配設される。これによって、経路部材７０の主体部分７１には、潤滑剤貯留部６０内の潤滑剤６２（例えば、潤滑剤６２がグリースである場合には、グリースの基油）が浸透される。 The rolling bearing device according to the first embodiment is configured as described above.
Therefore, as shown in FIG. 2, the main portion 71 of the path member 70 is disposed in the lubricant reservoir 60 in which the lubricant 62 is stored. Thereby, the lubricant 62 in the lubricant reservoir 60 (for example, the base oil of grease when the lubricant 62 is grease) permeates into the main portion 71 of the path member 70.

経路部材７０の主体部分７１に浸透された潤滑剤６２は、主体部分７１先端側の高密度先端部分７２に浸透され、主体部分７１側から高密度先端部分７２側に向かう潤滑剤６２の流れが生じる（図３の矢印参照）。
すなわち、主体部分７１は、高密度先端部分７２よりも密度が低く、主体部分７１と高密度先端部分７２とは疎密の関係となる。密度が疎である主体部分７１には、潤滑剤貯留部６０内の潤滑剤６２が取り込みやすく、その取り込み量も密の場合よりも多くなる。また、高密度先端部分７２は密度が高密であるため、潤滑剤６２（例えば、グリースの基油）の付着力、表面張力等の作用で、主体部分７１側の潤滑剤６２が高密度先端部分７２に浸透され、これによって、主体部分７１から高密度先端部分７２に向けて潤滑剤６２の流れが促進される。なお、高密度先端部分７２において、その空隙が潤滑剤６２の分子の大きさよりも小さい過度の高密となると潤滑剤６２が浸透不能となるため、少なくとも潤滑剤６２の分子の大きよりも大きく設定される。
高密度先端部分７２は、潤滑剤貯留部６０の開口部６１を通し、その先端接触部７３が外輪３０端面の環状凹部３５の底面に接触する（押し当てられる）。このため、高密度先端部分７２に浸透された潤滑剤６２は、外輪３０端面の環状凹部３５を伝って転がり軸受１１内としての外輪３０の保持器案内面３４と保持器４５の外周面との間に供給される。 The lubricant 62 that has permeated the main body portion 71 of the path member 70 permeates the high-density front end portion 72 on the front end side of the main body portion 71 and the flow of the lubricant 62 from the main body portion 71 side toward the high-density front end portion 72 side. Occurs (see arrow in FIG. 3).
That is, the main body portion 71 has a lower density than the high-density tip portion 72, and the main body portion 71 and the high-density tip portion 72 are in a sparse / dense relationship. In the main portion 71 having a low density, the lubricant 62 in the lubricant reservoir 60 can be easily taken in, and the amount to be taken is larger than that in the dense case. Further, since the high-density tip portion 72 has a high density, the lubricant 62 on the main portion 71 side causes the high-density tip portion due to the adhesion force, surface tension, and the like of the lubricant 62 (for example, grease base oil). 72, thereby promoting the flow of the lubricant 62 from the main body portion 71 toward the high-density tip portion 72. In addition, in the high-density tip portion 72, if the void becomes excessively high density smaller than the size of the molecule of the lubricant 62, the lubricant 62 cannot be penetrated, so that it is set at least larger than the size of the molecule of the lubricant 62. The
The high-density tip portion 72 passes through the opening 61 of the lubricant reservoir 60, and the tip contact portion 73 contacts (presses) the bottom surface of the annular recess 35 on the end surface of the outer ring 30. For this reason, the lubricant 62 that has penetrated into the high-density tip portion 72 travels through the annular recess 35 on the end surface of the outer ring 30 to form the cage guide surface 34 of the outer ring 30 in the rolling bearing 11 and the outer peripheral surface of the cage 45. Supplied in between.

また、外輪３０端面の環状凹部３５の底面と、経路部材７０の高密度先端部分７２の内周面と、貯留部構成体５５の開口用環状壁部５８とによって囲まれた空間部を潤滑剤溜まり部８０として構成し、この潤滑剤溜まり部８０に対し、例えば、潤滑剤８１としてのグリースが充填された場合には、潤滑剤溜まり部８０のグリースの基油が外輪３０端面の環状凹部３５を伝って転がり軸受１１内としての外輪３０の保持器案内面３４と保持器４５の外周面との間に供給される。そして、潤滑剤溜まり部８０のグリースの基油が不足したときには、高密度先端部分７２に浸透された潤滑剤６２（例えば、グリースの基油）が潤滑剤溜まり部８０のグリース内に補充される。 Further, the space surrounded by the bottom surface of the annular recess 35 on the end surface of the outer ring 30, the inner peripheral surface of the high-density tip portion 72 of the path member 70, and the annular wall portion 58 for opening of the storage portion constituting body 55 is lubricated. When the lubricant reservoir 80 is filled with, for example, grease as the lubricant 81, the base oil of the grease in the lubricant reservoir 80 is the annular recess 35 on the end face of the outer ring 30. And is supplied between the cage guide surface 34 of the outer ring 30 and the outer peripheral surface of the cage 45 in the rolling bearing 11. When the grease base oil in the lubricant reservoir 80 is insufficient, the lubricant 62 (for example, grease base oil) that has penetrated into the high-density tip 72 is replenished into the grease in the lubricant reservoir 80. .

前記したように、経路部材７０において、その主体部分７１を潤滑剤貯留部６０内に配設し、高密度先端部分７２を潤滑剤貯留部６０の開口部６１を通して外輪３０端面の環状凹部３５の底面に押し当てるという、極めて簡単な構成によって、潤滑剤貯留部６０の潤滑剤６２を転がり軸受１１内に良好に供給することができる。
また、転がり軸受１１の軸受回転時において、保持器案内面３４と、保持器４５の外周面との間に発生する摩擦熱が最も大きい。
そして、この実施例１においては、高密度先端部分７２に浸透された潤滑剤６２は、外輪３０端面の環状凹部３５を伝って、先ず、外輪３０の保持器案内面３４と保持器４５の外周面との間に供給される。このため、保持器案内面３４と、保持器４５の外周面との間に発生する摩擦熱による保持器４５の焼き付きや熱変形が潤滑剤によって抑制される。 As described above, in the path member 70, the main portion 71 is disposed in the lubricant reservoir 60, and the high-density tip portion 72 passes through the opening 61 of the lubricant reservoir 60 and the annular recess 35 on the end surface of the outer ring 30. The lubricant 62 in the lubricant reservoir 60 can be satisfactorily supplied into the rolling bearing 11 by an extremely simple configuration of pressing against the bottom surface.
Further, during the rotation of the rolling bearing 11, the frictional heat generated between the cage guide surface 34 and the outer peripheral surface of the cage 45 is the largest.
In the first embodiment, the lubricant 62 that has penetrated into the high-density tip portion 72 travels through the annular recess 35 on the end surface of the outer ring 30, and first, the outer periphery of the cage guide surface 34 of the outer ring 30 and the cage 45. Supplied between the faces. For this reason, seizure and thermal deformation of the cage 45 due to frictional heat generated between the cage guide surface 34 and the outer peripheral surface of the cage 45 are suppressed by the lubricant.

また、この実施例１においては、経路部材７０の高密度先端部分７２は、その先端接触部７３が外輪３０端面の環状凹部３５の底面に押し当てられて軸方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分７１よりも高密度をなしている。
また、経路部材７０の高密度先端部分７２は、潤滑剤貯留部６０の開口部６１で貯留部構成体５５の開口用環状壁部５８の外周面に押圧されることによって径方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分７１よりも高密度をなしている。 In the first embodiment, the high-density tip portion 72 of the path member 70 has its tip contact portion 73 pressed against the bottom surface of the annular recess 35 on the end surface of the outer ring 30 and compressed in the axial direction. The density is higher than that of the main portion 71 by the amount corresponding to the compression amount.
Further, the high-density tip portion 72 of the path member 70 is compressed in the radial direction by being pressed by the opening 61 of the lubricant reservoir 60 against the outer peripheral surface of the opening annular wall 58 of the reservoir structure 55. Thus, the density is higher than that of the main portion 71 by an amount corresponding to the compression amount.

前記したようにして、高密度先端部分７２を軸方向へ圧縮されたり、径方向へ圧縮されることで形成することができるため、予め、経路部材７０の先端部分を高密度に製作する必要がない。このため、経路部材７０を、潤滑剤が浸透可能な部材、例えば、フェルト等の繊維、連続気泡を有する多孔質樹脂（連続気泡の発泡体）、繊維を樹脂でバインド成形した繊維材料等によって容易に製作することができる。 As described above, since the high-density tip portion 72 can be formed by being compressed in the axial direction or compressed in the radial direction, it is necessary to manufacture the tip portion of the path member 70 at a high density in advance. Absent. For this reason, the path member 70 is easily made of a material that can penetrate the lubricant, such as a fiber such as felt, a porous resin having open cells (open cell foam), a fiber material in which the fibers are bind-molded with a resin, and the like. Can be produced.

なお、この発明は前記実施例１に限定するものではなく、この発明の要旨を逸脱しない範囲内において、種々の形態で実施することができる。
例えば、前記実施例１においては、外輪３０端面の環状凹部３５の底面と、経路部材７０の高密度先端部分７２の内周面と、貯留部構成体５５の開口用環状壁部５８とによって囲まれた空間部を潤滑剤溜まり部８０として構成したが、潤滑剤溜まり部８０は必ずしも設けなくてもよい。
また、前記実施例１においては、経路部材７０の主体部分７１及び高密度先端部分７２が周方向に連続して筒状をなす場合を例示したが、紐状又は帯状の複数の経路部材を周方向に断続的に配設してもこの発明を実施することができる。
また、前記実施例１においては、経路部材７０の高密度先端部分７２は、経路部材７０の先端部分が軸方向へ圧縮されたり、径方向へ圧縮されることで構成される場合を例示したが、例えば、フェルト等の繊維、連続気泡を有する多孔質樹脂（連続気泡の発泡体）、繊維を樹脂でバインド成形した繊維材料等によって経路部材７０の先端部分を高密度に製作して高密度先端部分７２を構成することも可能である。
また、前記実施例１においては、経路部材７０の高密度先端部分７２の先端接触部７３が押し当てられる外輪３０端面に環状凹部３５が形成される場合を例示したが、環状凹部３５は必ずしも設けなくてもよい。
また、前記実施例１においては、内輪２０が回転輪であり、外輪３０が固定輪である場合を例示したが内輪２０が固定輪であり、外輪が回転輪である場合においてもこの発明を実施することが可能である。 In addition, this invention is not limited to the said Example 1, In the range which does not deviate from the summary of this invention, it can implement with a various form.
For example, in the first embodiment, the bottom surface of the annular recess 35 on the end surface of the outer ring 30, the inner peripheral surface of the high-density tip portion 72 of the path member 70, and the opening annular wall portion 58 of the storage portion constituting body 55 are surrounded. The space portion is configured as the lubricant reservoir 80, but the lubricant reservoir 80 is not necessarily provided.
In the first embodiment, the main portion 71 and the high-density tip portion 72 of the path member 70 are continuously formed in a cylindrical shape in the circumferential direction. However, a plurality of string-shaped or belt-shaped path members are surrounded by a loop. The present invention can be carried out even if it is arranged intermittently in the direction.
In the first embodiment, the case where the high-density tip portion 72 of the path member 70 is configured by compressing the tip portion of the path member 70 in the axial direction or in the radial direction is illustrated. For example, the tip portion of the path member 70 is manufactured with a high density by using a fiber such as felt, a porous resin having open cells (open cell foam), a fiber material in which fibers are bind-molded with resin, and the like. It is also possible to constitute part 72.
In the first embodiment, the case where the annular recess 35 is formed on the end surface of the outer ring 30 against which the tip contact portion 73 of the high-density tip portion 72 of the path member 70 is pressed is illustrated. However, the annular recess 35 is not necessarily provided. It does not have to be.
Further, in the first embodiment, the case where the inner ring 20 is a rotating wheel and the outer ring 30 is a fixed ring is illustrated. However, the present invention is implemented even when the inner ring 20 is a fixed ring and the outer ring is a rotating ring. Is possible.

１回転軸
２ハウジング
１１転がり軸受
２０内輪（回転輪）
３０外輪（固定輪）
４１転動体
４５保持器
５０貯留部構成部材
５１外輪間座
５５貯留部構成体
６０潤滑剤貯留部
６１開口部
６２潤滑剤
７０経路部材
７１主体部分
７２高密度先端部分
７３先端接触部
DESCRIPTION OF SYMBOLS 1 Rotating shaft 2 Housing 11 Rolling bearing 20 Inner ring (rotating ring)
30 Outer ring (fixed ring)
DESCRIPTION OF SYMBOLS 41 Rolling body 45 Cage 50 Storage part structural member 51 Outer ring spacer 55 Storage part structural body 60 Lubricant storage part 61 Opening part 62 Lubricant 70 Path | route member 71 Main part 72 High-density tip part 73 Tip contact part

Claims

回転輪と、固定輪と、前記回転輪と固定輪との間の環状空間に転動可能に配設される複数の転動体とを有する転がり軸受を備え、
前記固定輪の少なくとも一端側には、潤滑剤が貯留される潤滑剤貯留部を構成する貯留部構成部材が前記固定輪側に固定された状態で配設され、
前記貯留部構成部材には、前記潤滑剤貯留部を前記固定輪の端面に向けて開口する開口部が形成され、
前記貯留部構成部材には、前記潤滑剤貯留部から前記固定輪の端面までの間の潤滑剤の供給経路をなす経路部材が配設され、
前記経路部材は、潤滑剤が浸透可能な部材によって形成されると共に、前記潤滑剤貯留部内に配設される主体部分と、
前記主体部分に一体状に形成され、前記主体部分よりも高密度をなして潤滑剤の浸透性が高められ、かつ前記潤滑剤貯留部の開口部を通して前記固定輪の端面に接触する高密度先端部分と、
を有していることを特徴とする転がり軸受装置。 A rolling bearing having a rotating wheel, a fixed wheel, and a plurality of rolling elements that are rotatably disposed in an annular space between the rotating wheel and the fixed wheel;
At least one end side of the fixed wheel is disposed in a state where a storage member constituting a lubricant storage portion in which a lubricant is stored is fixed to the fixed wheel side,
The reservoir component member is formed with an opening that opens the lubricant reservoir toward an end surface of the fixed wheel,
A path member forming a lubricant supply path between the lubricant reservoir and the end surface of the fixed wheel is disposed in the reservoir component member,
The path member is formed of a member through which a lubricant can permeate, and a main portion disposed in the lubricant reservoir,
A high-density tip that is formed integrally with the main body portion, has a higher density than the main body portion, enhances the permeability of the lubricant, and contacts the end face of the fixed ring through the opening of the lubricant reservoir. Part,
A rolling bearing device comprising:

請求項１に記載の転がり軸受装置であって、
経路部材の高密度先端部分は、固定輪の端面に押し当てられて軸方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分よりも高密度をなしていることを特徴とする転がり軸受装置。 The rolling bearing device according to claim 1,
The high-density tip portion of the path member is pressed against the end face of the fixed ring and compressed in the axial direction, so that it has a higher density than the main portion by an amount corresponding to the compression amount. Rolling bearing device.

請求項１又は２に記載の転がり軸受装置であって、
経路部材の高密度先端部分は、潤滑剤貯留部の開口部で径方向へ圧縮されることで、その圧縮量に相当する分だけ主体部分よりも高密度をなしていることを特徴とする転がり軸受装置。 A rolling bearing device according to claim 1 or 2,
The rolling member is characterized in that the high-density tip portion of the path member is compressed in the radial direction at the opening portion of the lubricant storage portion, thereby forming a higher density than the main portion by an amount corresponding to the compression amount. Bearing device.

請求項１〜３のいずれか一項に記載の転がり軸受装置であって、
固定輪の端面には環状凹部が形成され、前記環状凹部の底面に経路部材の高密度先端部分が接触することを特徴とする転がり軸受装置。 It is a rolling bearing device as described in any one of Claims 1-3,
An annular recess is formed on the end surface of the fixed ring, and the high-density tip portion of the path member is in contact with the bottom surface of the annular recess.