JP2005061575A - Rolling bearing - Google Patents

Rolling bearing Download PDF

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JP2005061575A
JP2005061575A JP2003295316A JP2003295316A JP2005061575A JP 2005061575 A JP2005061575 A JP 2005061575A JP 2003295316 A JP2003295316 A JP 2003295316A JP 2003295316 A JP2003295316 A JP 2003295316A JP 2005061575 A JP2005061575 A JP 2005061575A
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oil
inner ring
ring
outer ring
rolling bearing
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Yasushi Amano
靖 天野
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NSK Ltd
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NSK Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a rolling bearing capable of reducing oil leakage by properly delivering a lubricant in a bearing space. <P>SOLUTION: In this rolling bearing comprising an outer ring 12 as a rotating ring having an outer ring raceway face, an inner ring 14 as a stationary ring having an inner ring raceway face, a plurality of rolling elements 15 rollably mounted between the outer ring and the inner ring raceway face, and oil seals 19 mounted on both axial end parts of the outer ring, and supplying the lubricant into the bearing space defined by the outer ring 12, the inner ring 14 and the oil seals 19 to apply the lubricant, the inner ring 12 comprises oil delivering holes 23, 32 for delivering the lubricant to a shaft side, and the oil delivering ports 22, 34 of the oil delivering holes 23, 32 are formed near a sliding face of the inner ring 14 where the oil seals 19 slide. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は、転がり軸受に関し、詳細には、鉄鋼産業における製鐡設備等に使用され、強制循環給油、オイルミスト潤滑、オイルエア潤滑のような油潤滑が適用され、外輪回転にて使用される転がり軸受に関する。   TECHNICAL FIELD The present invention relates to a rolling bearing, and more specifically, is used in steelmaking facilities in the steel industry, and is used in outer ring rotation to which oil lubrication such as forced circulation lubrication, oil mist lubrication, and oil air lubrication is applied. Related to bearings.

従来、外輪回転にて使用される転がり軸受を潤滑する手法が種々考案されている(例えば、特許文献1参照。)。図3は、外輪回転にて使用される複列円筒ころ軸受にオイルエア潤滑が適用される従来の構造を示す。   Conventionally, various techniques for lubricating a rolling bearing used in outer ring rotation have been devised (see, for example, Patent Document 1). FIG. 3 shows a conventional structure in which oil-air lubrication is applied to a double-row cylindrical roller bearing used in outer ring rotation.

図3において、複列円筒ころ軸受40は、内周面に複列の外輪軌道面41を有する外輪42と、外周面に複列の内輪軌道面43を有する内輪44と、外輪軌道面41と内輪軌道面43との間に転動自在に配された複数の円筒ころ45と、円筒ころ45を円周方向に等間隔に保持する保持器46とを備えている。   3, a double row cylindrical roller bearing 40 includes an outer ring 42 having a double row outer ring raceway surface 41 on an inner peripheral surface, an inner ring 44 having a double row inner ring raceway surface 43 on an outer peripheral surface, and an outer ring raceway surface 41. A plurality of cylindrical rollers 45 disposed so as to be able to roll between the inner ring raceway surface 43 and a cage 46 for holding the cylindrical rollers 45 at equal intervals in the circumferential direction are provided.

内輪44の両端部側方には、各列の円筒ころ45の端面と摺動接触可能な一対の鍔輪47が設けられている。内輪44及び鍔輪47は、固定軸48に複数のOリング49を介して外嵌固定された静止輪として作用し、外輪42は円筒ころ45を介して相対回転する回転輪として作用する。また、外輪42の軸方向両端部には、その内周面に一対のオイルシール50が取付けられており、オイルシール50のリップ部51が鍔輪47の外周面と摺動するように構成されている。
また、内輪44の軸方向中間部には、給油孔52が穿孔されると共に、軸方向両端部には、鍔輪47と対向する部分に端面油溝53が形成されている。
On both sides of the inner ring 44, there are provided a pair of flanges 47 that can be in sliding contact with the end surfaces of the cylindrical rollers 45 in each row. The inner ring 44 and the eaves ring 47 act as stationary wheels that are externally fitted and fixed to the fixed shaft 48 via a plurality of O-rings 49, and the outer ring 42 acts as a rotating ring that rotates relative to each other via cylindrical rollers 45. In addition, a pair of oil seals 50 are attached to the inner peripheral surfaces of both ends in the axial direction of the outer ring 42, and the lip portion 51 of the oil seal 50 is configured to slide with the outer peripheral surface of the collar ring 47. ing.
In addition, an oil supply hole 52 is drilled in an axially intermediate portion of the inner ring 44, and an end face oil groove 53 is formed in a portion facing the flange ring 47 at both axial ends.

図示しない潤滑油供給装置から送られたオイルエアは、固定軸48に形成された給油通路54、内輪44の給油孔52を介して、外輪42、内輪44、オイルシール50とで画成された軸受空間内を供給潤滑する。一方、軸受空間内を潤滑したオイルエアは、内輪44の端面油溝53、固定軸48に形成された排油通路55を通って回収される。
実開平5−22849号公報
Oil air sent from a lubricating oil supply device (not shown) is a bearing defined by an outer ring 42, an inner ring 44, and an oil seal 50 through an oil supply passage 54 formed in the fixed shaft 48 and an oil supply hole 52 of the inner ring 44. Lubricate the supply inside the space. On the other hand, the oil air lubricated in the bearing space is collected through an oil drain passage 55 formed in the end face oil groove 53 of the inner ring 44 and the fixed shaft 48.
Japanese Utility Model Publication No. 5-22849

しかしながら、図3に示された複列円筒ころ軸受40では、内輪44に形成された端面油溝53を用いて排油が行われている。このため、潤滑油は軸受下部における内輪軌道面43まで溜まり、軸受空間内に充満して、オイルシール50のリップ部51から油漏れが生じることが懸念された。また、軸受空間の内圧が増加すると、外輪42の鍔部に装着されたオイルシール50が軸方向に変形する可能性があり、リップ部51からの油漏れがより起きやすくなるという問題がある。   However, in the double row cylindrical roller bearing 40 shown in FIG. 3, oil is discharged using the end face oil groove 53 formed in the inner ring 44. For this reason, there is a concern that the lubricating oil accumulates up to the inner ring raceway surface 43 in the lower portion of the bearing, fills the bearing space, and oil leaks from the lip portion 51 of the oil seal 50. Further, when the internal pressure of the bearing space increases, there is a possibility that the oil seal 50 mounted on the flange portion of the outer ring 42 may be deformed in the axial direction, and oil leakage from the lip portion 51 is more likely to occur.

本発明は、上記の問題点を鑑みて、軸受空間内の潤滑油を適当に排出して油漏れが起き難い転がり軸受を提供することを目的とする。   In view of the above-described problems, an object of the present invention is to provide a rolling bearing that appropriately discharges lubricating oil in a bearing space and hardly causes oil leakage.

本発明の上記の目的は、下記構成によって達成される。
(1)外輪軌道面を有する回転輪である外輪と、内輪軌道面を有する静止輪である内輪と、前記外輪及び前記内輪軌道面間に転動自在に配された複数の転動体と、前記外輪の軸方向両端部に設けられたオイルシールと、を備え、前記外輪、内輪、オイルシールとで画成された軸受空間内に潤滑油を供給する油潤滑が適用される、転がり軸受において、
前記内輪は、前記潤滑油を軸側(本実施形態における固定軸の排出通路)に排出するための排油孔を備え、
前記排油孔の排油口は、前記オイルシールが摺動する前記内輪の摺動面近傍に形成されていることを特徴とする転がり軸受。
(2)前記油潤滑は、圧縮空気を利用して前記潤滑油を供給通路(本実施形態における給油通路、給油孔を含む)の内壁面に沿って移動させるようにして、前記軸受空間内を潤滑するオイルエア潤滑であることを特徴とする(1)に記載の転がり軸受。
(3)前記内輪は、外周面に前記排油孔の排油口及び前記摺動面が形成された鍔部を備え、前記鍔部は、前記摺動面に対して前記排油口の反対側に、前記鍔部の外周面から径方向外方に突出する環状突起を有することを特徴とする(1)又は(2)に記載の転がり軸受。
(4)前記オイルシールは、前記環状突起の内側面と対向する位置に、外側面から軸方向に突出した突起部を備えたことを特徴とする(3)に記載の転がり軸受。
The above object of the present invention is achieved by the following configurations.
(1) An outer ring that is a rotating ring having an outer ring raceway surface, an inner ring that is a stationary ring having an inner ring raceway surface, a plurality of rolling elements that are arranged to freely roll between the outer ring and the inner ring raceway surface, An oil seal provided at both axial ends of the outer ring, and a rolling bearing to which oil lubrication is applied to supply a lubricating oil into a bearing space defined by the outer ring, the inner ring, and the oil seal.
The inner ring includes an oil drain hole for discharging the lubricating oil to the shaft side (discharge passage of the fixed shaft in the present embodiment),
An oil discharge port of the oil discharge hole is formed in the vicinity of a sliding surface of the inner ring on which the oil seal slides.
(2) In the oil lubrication, the lubricating oil is moved along the inner wall surface of the supply passage (including the oil supply passage and the oil supply hole in the present embodiment) using compressed air, and the inside of the bearing space is moved. The rolling bearing according to (1), which is oil-air lubrication.
(3) The inner ring includes a flange portion in which an oil discharge port of the oil discharge hole and the sliding surface are formed on an outer peripheral surface, and the flange portion is opposite to the oil discharge port with respect to the sliding surface. The rolling bearing according to (1) or (2), further including an annular protrusion that protrudes radially outward from an outer peripheral surface of the flange portion.
(4) The rolling bearing according to (3), wherein the oil seal includes a protruding portion that protrudes in the axial direction from the outer surface at a position facing the inner surface of the annular protrusion.

本発明によれば、外輪回転にて使用され、油潤滑が適用される転がり軸受において、内輪に設けられた排油孔の排油口をオイルシールが摺動する内輪の摺動面近傍に形成している。したがって、排油口とオイルシールのリップ部とが同レベルかつ近い位置にあるため、軸受内の油浴レベルとリップ部の摺動位置とが同レベルとなる。これにより、リップ部近傍の余分な油が排油孔へと搬送され、オイルシールのリップ部からの油漏れを非常に少なくすることが可能となる。   According to the present invention, in a rolling bearing used for outer ring rotation and to which oil lubrication is applied, the oil drain hole of the oil drain hole provided in the inner ring is formed near the sliding surface of the inner ring on which the oil seal slides. doing. Accordingly, since the oil outlet and the lip portion of the oil seal are at the same level and close to each other, the oil bath level in the bearing and the sliding position of the lip portion are at the same level. As a result, excess oil in the vicinity of the lip portion is conveyed to the oil drain hole, and oil leakage from the lip portion of the oil seal can be greatly reduced.

また、内輪の鍔部に環状突起が設けられたので、軸受空間の内圧増加によるオイルシールの軸方向変形を防止することができ、オイルシールのリップ部から油漏れが発生することをより確実に防止することができる。さらに、オイルシールが軸方向に変形したとしても、オイルシールに突起部を設けることで接触面積を小さくし、シール効果を落とさずに、環状突起との面接触によるトルクの増加を防止することができる。   In addition, since an annular protrusion is provided on the flange portion of the inner ring, it is possible to prevent axial deformation of the oil seal due to an increase in the internal pressure of the bearing space, and more reliably that oil leakage occurs from the lip portion of the oil seal. Can be prevented. Furthermore, even if the oil seal is deformed in the axial direction, providing a protrusion on the oil seal can reduce the contact area and prevent an increase in torque due to surface contact with the annular protrusion without deteriorating the sealing effect. it can.

以下、図面を参照して本発明の実施形態について説明する。図1(a)は、第1実施形態に係る油潤滑であるオイルエア潤滑が適用される転がり軸受の断面図であり、図1(b)は、図1(a)のA部分の拡大断面図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig.1 (a) is sectional drawing of the rolling bearing to which the oil air lubrication which is the oil lubrication concerning 1st Embodiment is applied, FIG.1 (b) is an expanded sectional view of A part of Fig.1 (a). It is.

図1(a)において、転がり軸受である複列円筒ころ軸受10は、内周面に複列の外輪軌道面11を有する外輪12と、外周面にそれぞれ内輪軌道面13を有する一対の内輪14と、複列の外輪軌道面11と内輪軌道面13との間に転動自在に配された転動体である複数の円筒ころ15とを備えている。内輪14は、固定軸16に複数のOリング17を介して外嵌固定された静止輪として作用し、外輪12は、円筒ころ15を介して相対回転する回転輪として作用する。   In FIG. 1A, a double row cylindrical roller bearing 10 which is a rolling bearing includes an outer ring 12 having a double row outer ring raceway surface 11 on an inner peripheral surface and a pair of inner rings 14 each having an inner ring raceway surface 13 on an outer peripheral surface. And a plurality of cylindrical rollers 15 which are rolling elements arranged so as to be freely rollable between the double-row outer ring raceway surface 11 and the inner ring raceway surface 13. The inner ring 14 acts as a stationary wheel that is externally fitted and fixed to the fixed shaft 16 via a plurality of O-rings 17, and the outer ring 12 acts as a rotating wheel that rotates relative to each other via cylindrical rollers 15.

一対の内輪14は、それぞれ一方の端部同士を突き合わせて配置されている。また、各内輪14の他方の端部には、各列の円筒ころ15の端面と摺動接触可能な鍔部18が設けられている。外輪12の軸方向両端部には、その内周面に一対のオイルシール19が取付けられており、オイルシール19のリップ部20が鍔部18の外周面と摺動するように構成されている。   The pair of inner rings 14 are arranged such that one ends thereof are butted against each other. In addition, a flange 18 is provided at the other end of each inner ring 14 so as to be in sliding contact with the end surface of each row of cylindrical rollers 15. A pair of oil seals 19 are attached to the inner circumferential surfaces of both ends of the outer ring 12 in the axial direction, and the lip portion 20 of the oil seal 19 is configured to slide with the outer circumferential surface of the flange portion 18. .

一対の内輪14の一方の端部間には、径方向に貫通した給油孔21が設けられている。また、各内輪の鍔部18には、オイルシール19のリップ部20が摺動する摺動面近傍に排出口22を有し、径方向に貫通する排油孔23が穿孔されている。
給油孔21は、固定軸16に設けられた給油通路24と、外輪12、内輪14、オイルシール19とで画成された軸受空間とを連通しており、排出孔23は、固定軸16に設けられた排油通路25と、軸受空間とを連通している。
An oil supply hole 21 penetrating in the radial direction is provided between one end portions of the pair of inner rings 14. Further, the flange portion 18 of each inner ring has a discharge port 22 in the vicinity of the sliding surface on which the lip portion 20 of the oil seal 19 slides, and an oil discharge hole 23 penetrating in the radial direction is drilled.
The oil supply hole 21 communicates an oil supply passage 24 provided in the fixed shaft 16 and a bearing space defined by the outer ring 12, the inner ring 14, and the oil seal 19, and the discharge hole 23 is connected to the fixed shaft 16. The provided oil drainage passage 25 and the bearing space communicate with each other.

また、各内輪14の鍔部18には、リップ部20が摺動する摺動面に対して排油口22の軸方向反対側に、鍔部18の外周面から径方向外方に突出する環状突起26が設けられている。環状突起26は、軸受空間の内圧増加によるオイルシール19の軸方向変形を防止しており、その軸方向内側面はオイルシール19の外側面と対向している。   Further, the flange portion 18 of each inner ring 14 protrudes radially outward from the outer peripheral surface of the flange portion 18 on the opposite side in the axial direction of the oil discharge port 22 with respect to the sliding surface on which the lip portion 20 slides. An annular protrusion 26 is provided. The annular protrusion 26 prevents axial deformation of the oil seal 19 due to an increase in the internal pressure of the bearing space, and the axial inner surface faces the outer surface of the oil seal 19.

一方、図1(b)に示されるように、オイルシール19の外側面には、環状突起26の内側面と対向する位置に、軸方向外方に突出した突起部27が形成されている。これにより、オイルシール19が軸受空間の内圧増加により軸方向に変形したとしても、突起部27が環状突起26の内側面と接触するので、接触面積を小さくし、シール効果を落とさずに、環状突起26との面接触によるトルクの増加を防止することができる。   On the other hand, as shown in FIG. 1 (b), on the outer surface of the oil seal 19, a protruding portion 27 protruding outward in the axial direction is formed at a position facing the inner surface of the annular protrusion 26. As a result, even if the oil seal 19 is deformed in the axial direction due to an increase in the internal pressure of the bearing space, the projecting portion 27 contacts the inner surface of the annular projection 26. An increase in torque due to surface contact with the protrusions 26 can be prevented.

本実施形態のオイルエア潤滑においては、図示しない潤滑油供給装置が、圧縮空気を利用して、潤滑油を供給通路の内壁面に沿って移動させるように、圧縮空気と潤滑油を適宜混合してなるオイルエアを搬送する。オイルエアは、固定軸16の給油通路24、内輪12の給油孔21を介して、軸受空間内に搬送され、軸受空間内を潤滑する。一方、軸受空間内を潤滑したオイルエアは、内輪14の排油孔23、固定軸16の排油通路25を通り、固定軸16の外部に排出される。   In the oil-air lubrication of the present embodiment, the compressed oil and the lubricating oil are appropriately mixed so that the lubricating oil supply device (not shown) uses the compressed air to move the lubricating oil along the inner wall surface of the supply passage. Convey oil air. The oil air is conveyed into the bearing space through the oil supply passage 24 of the fixed shaft 16 and the oil supply hole 21 of the inner ring 12, and lubricates the bearing space. On the other hand, the oil air lubricated in the bearing space passes through the oil drain hole 23 of the inner ring 14 and the oil drain passage 25 of the fixed shaft 16 and is discharged to the outside of the fixed shaft 16.

従って、本実施形態の複列円筒ころ軸受によれば、オイルシール19のリップ部20が摺動する内輪14の摺動面近傍、即ち、内輪14の鍔部18の外周面上であり、かつ、リップ部20が摺接する部分の近傍に、オイルエアを排出するための排油孔23の排油口22が設けられている。このため、軸受内の油浴レベルとリップ部20の摺動位置とが同レベルとなり、オイルシール19のリップ部20近傍の余分なオイルは直ちに排油孔23へと排出され、オイルシール19のリップ部20からの油漏れを非常に少なくすることができる。   Therefore, according to the double-row cylindrical roller bearing of the present embodiment, near the sliding surface of the inner ring 14 on which the lip portion 20 of the oil seal 19 slides, that is, on the outer peripheral surface of the flange portion 18 of the inner ring 14, and An oil discharge port 22 of an oil discharge hole 23 for discharging oil air is provided in the vicinity of the portion where the lip portion 20 is in sliding contact. For this reason, the oil bath level in the bearing and the sliding position of the lip portion 20 become the same level, and excess oil in the vicinity of the lip portion 20 of the oil seal 19 is immediately discharged to the oil drain hole 23. Oil leakage from the lip portion 20 can be greatly reduced.

また、各内輪14の鍔部18には、リップ部20が摺動する摺動面に対して排油口22の軸方向反対側に、鍔部18の外周面から径方向外方に突出する環状突起26が設けられたので、軸受空間の内圧増加によるオイルシール19の軸方向変形を防止することができ、オイルシール19のリップ部20から油漏れが発生することをより確実に防止することができる。さらに、オイルシール19が軸方向に変形したとしても、オイルシールに突起部27を設けることで接触面積を小さくし、シール効果を落とさずに、環状突起26との面接触によるトルクの増加を防止することができる。   Further, the flange portion 18 of each inner ring 14 protrudes radially outward from the outer peripheral surface of the flange portion 18 on the opposite side in the axial direction of the oil discharge port 22 with respect to the sliding surface on which the lip portion 20 slides. Since the annular projection 26 is provided, the axial deformation of the oil seal 19 due to an increase in the internal pressure of the bearing space can be prevented, and oil leakage from the lip portion 20 of the oil seal 19 can be more reliably prevented. Can do. Further, even if the oil seal 19 is deformed in the axial direction, the protrusion 27 is provided on the oil seal to reduce the contact area and prevent an increase in torque due to surface contact with the annular protrusion 26 without deteriorating the sealing effect. can do.

次に、本発明の第2実施形態に係る転がり軸受について図2を参照して説明する。なお、第2実施形態の転がり軸受は、油潤滑における給・排油構造が特徴であり、その他の構成は第1実施形態と略同様であるので、同一の構成については、同一の符号を付し、その部分の説明は省略若しくは簡略にする。   Next, a rolling bearing according to a second embodiment of the present invention will be described with reference to FIG. Note that the rolling bearing of the second embodiment is characterized by a supply / drainage structure in oil lubrication, and other configurations are substantially the same as those of the first embodiment. Therefore, the same components are denoted by the same reference numerals. However, the description of that part is omitted or simplified.

転がり軸受である複列円筒ころ軸受30では、給油孔31が一方の内輪14(図中左側)の鍔部18に穿孔されていると共に、排油孔32が他方の内輪14(図中右側)の鍔部18に穿孔されている。給油孔31は、オイルシール19のリップ部20が摺動する鍔部18の摺動面近傍に給油口33を有しており、固定軸16の給油通路24と軸受空間とを連通するように径方向に貫通している。また、排油孔32は、オイルシール19のリップ部20が摺動する鍔部18の摺動面近傍に排油口34を有しており、固定軸16の排油通路25と軸受空間とを連通するように径方向に貫通している。   In the double-row cylindrical roller bearing 30 which is a rolling bearing, an oil supply hole 31 is drilled in the flange portion 18 of one inner ring 14 (left side in the figure), and an oil discharge hole 32 is formed in the other inner ring 14 (right side in the figure). The perforated portion 18 is perforated. The oil supply hole 31 has an oil supply port 33 in the vicinity of the sliding surface of the flange portion 18 on which the lip portion 20 of the oil seal 19 slides, so that the oil supply passage 24 of the fixed shaft 16 and the bearing space communicate with each other. It penetrates in the radial direction. Further, the oil drain hole 32 has an oil drain port 34 in the vicinity of the sliding surface of the flange portion 18 on which the lip portion 20 of the oil seal 19 slides, and the oil drain passage 25 of the fixed shaft 16 and the bearing space. Are penetrated in the radial direction so as to communicate with each other.

上記構成の複列円筒ころ軸受30におけるオイルエア潤滑では、内輪14の中央部分から給油ができないような場合に、一方の内輪14に形成された給油孔32から軸受空間内にオイルエアを供給し、他方の内輪14に形成された排油孔34を介して、外部へオイルエアを排出している。ここで、排油孔34の排油口33は、第1実施形態と同様、オイルシール19のリップ部20が摺動する内輪14の摺動面近傍、即ち、内輪14の鍔部18の外周面上であり、かつ、オイルシール19のリップ部20が摺動する部分の近傍に設けられている。このため、軸受内の油浴レベルとリップ部20の摺動位置とが同レベルとなり、オイルシール19のリップ部20近傍の余分なオイルは直ちに排油孔23へと排出され、オイルシール19のリップ部20からの油漏れを非常に少なくすることができる。   In the oil / air lubrication in the double-row cylindrical roller bearing 30 having the above-described configuration, when oil cannot be supplied from the central portion of the inner ring 14, oil air is supplied into the bearing space from the oil supply hole 32 formed in one inner ring 14, and the other Oil air is discharged to the outside through an oil discharge hole 34 formed in the inner ring 14. Here, the oil discharge port 33 of the oil discharge hole 34 is similar to the first embodiment in the vicinity of the sliding surface of the inner ring 14 on which the lip 20 of the oil seal 19 slides, that is, the outer periphery of the flange 18 of the inner ring 14. It is provided on the surface and in the vicinity of the portion where the lip portion 20 of the oil seal 19 slides. For this reason, the oil bath level in the bearing and the sliding position of the lip portion 20 become the same level, and excess oil in the vicinity of the lip portion 20 of the oil seal 19 is immediately discharged to the oil drain hole 23. Oil leakage from the lip portion 20 can be greatly reduced.

また、本実施形態では、給油孔32、排油孔34が同一形状を有することから、一対の内輪14は同一形状に加工される。これにより、内輪14の加工が容易となり、コストアップを抑えることができる。   Moreover, in this embodiment, since the oil supply hole 32 and the oil drain hole 34 have the same shape, the pair of inner rings 14 are processed into the same shape. Thereby, the processing of the inner ring 14 becomes easy, and an increase in cost can be suppressed.

なお、本発明は上述した各実施形態に限定されるものではなく、適宜な変形、改良等が可能である。本実施形態の排油孔は、内輪と一体に設けられた鍔部に形成されているけれども、内輪と別体に設けられた鍔輪に排油孔を穿孔し、オイルシールのリップ部が摺動する鍔輪外周の摺動面近傍に排油口が形成されるようにしてもよい。   In addition, this invention is not limited to each embodiment mentioned above, A suitable deformation | transformation, improvement, etc. are possible. Although the oil drainage hole of this embodiment is formed in the collar provided integrally with the inner ring, the oil drainage hole is drilled in the collar provided separately from the inner ring, and the lip part of the oil seal slides. An oil drain port may be formed in the vicinity of the sliding surface on the outer periphery of the moving wheel ring.

図1(a)は、第1実施形態に係る油潤滑が適用された転がり軸受の断面図であり、図1(b)は、図1(a)のA部分の拡大断面図である。Fig.1 (a) is sectional drawing of the rolling bearing to which the oil lubrication concerning 1st Embodiment was applied, FIG.1 (b) is an expanded sectional view of A part of Fig.1 (a). 図2は、第2実施形態に係る油潤滑が適用された転がり軸受の断面図である。FIG. 2 is a cross-sectional view of a rolling bearing to which oil lubrication according to the second embodiment is applied. 従来の油潤滑が適用された転がり軸受の構成を示す断面図である。It is sectional drawing which shows the structure of the rolling bearing to which the conventional oil lubrication was applied.

符号の説明Explanation of symbols

10,30 複列円筒ころ軸受(転がり軸受)
12 外輪
14 内輪
15 円筒ころ(転動体)
19 オイルシール
22,34 排油口
23,32 排油孔
10,30 Double row cylindrical roller bearing (rolling bearing)
12 Outer ring
14 Inner ring 15 Cylindrical roller (rolling element)
19 Oil seal 22, 34 Oil outlet
23, 32 Oil drain hole

Claims (4)

外輪軌道面を有する回転輪である外輪と、内輪軌道面を有する静止輪である内輪と、前記外輪及び前記内輪軌道面間に転動自在に配された複数の転動体と、前記外輪の軸方向両端部に設けられたオイルシールと、を備え、前記外輪、内輪、オイルシールとで画成された軸受空間内に潤滑油を供給する油潤滑が適用される、転がり軸受において、
前記内輪は、前記潤滑油を軸側に排出するための排油孔を備え、
前記排油孔の排油口は、前記オイルシールが摺動する前記内輪の摺動面近傍に形成されていることを特徴とする転がり軸受。
An outer ring that is a rotating wheel having an outer ring raceway surface, an inner ring that is a stationary ring having an inner ring raceway surface, a plurality of rolling elements that are freely rollable between the outer ring and the inner ring raceway surface, and an axis of the outer ring In a rolling bearing provided with oil seals provided at both ends in the direction, and applied with oil lubrication for supplying lubricating oil into a bearing space defined by the outer ring, the inner ring, and the oil seal,
The inner ring includes an oil drain hole for discharging the lubricating oil to the shaft side,
An oil discharge port of the oil discharge hole is formed in the vicinity of a sliding surface of the inner ring on which the oil seal slides.
前記油潤滑は、圧縮空気を利用して前記潤滑油を供給通路の内壁面に沿って移動させるようにして、前記軸受空間内を潤滑するオイルエア潤滑であることを特徴とする請求項1に記載の転がり軸受。   The oil lubrication is oil-air lubrication that lubricates the inside of the bearing space by moving the lubricating oil along an inner wall surface of a supply passage using compressed air. Rolling bearings. 前記内輪は、外周面に前記排油孔の排油口及び前記摺動面が形成された鍔部を備え、前記鍔部は、前記摺動面に対して前記排油口の反対側に、前記鍔部の外周面から径方向外方に突出する環状突起を有することを特徴とする請求項1又は2に記載の転がり軸受。   The inner ring includes a flange portion in which an oil discharge port of the oil discharge hole and the sliding surface are formed on an outer peripheral surface, and the flange portion is on the opposite side of the oil discharge port with respect to the sliding surface. The rolling bearing according to claim 1, further comprising an annular protrusion protruding radially outward from an outer peripheral surface of the flange portion. 前記オイルシールは、前記環状突起の内側面と対向する位置に、外側面から軸方向に突出した突起部を備えたことを特徴とする請求項3に記載の転がり軸受。   The rolling bearing according to claim 3, wherein the oil seal includes a protruding portion that protrudes in the axial direction from the outer surface at a position facing the inner surface of the annular protrusion.
JP2003295316A 2003-08-19 2003-08-19 Rolling bearing Pending JP2005061575A (en)

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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008256160A (en) * 2007-04-09 2008-10-23 Nsk Ltd Bearing device
CN106743220A (en) * 2016-11-29 2017-05-31 青岛碱业发展有限公司 It is a kind of can self-lubricating plus grey conveying worm
CN106762790A (en) * 2016-12-31 2017-05-31 浙江耐士伦机械有限公司 A kind of automobile engine cooling fan transmission device
CN107355470A (en) * 2017-08-15 2017-11-17 中冶辽宁德龙钢管有限公司 A kind of Forming Roll for Spiral Weld Pipe and its lubricating system, lubricating method
CN114321384A (en) * 2021-12-28 2022-04-12 安徽亚兰密封件股份有限公司 Mechanical sealing system for solving lubrication
WO2023065753A1 (en) * 2021-10-22 2023-04-27 珠海格力电器股份有限公司 Bearing cylinder for compressor, compressor and air conditioner

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008256160A (en) * 2007-04-09 2008-10-23 Nsk Ltd Bearing device
CN106743220A (en) * 2016-11-29 2017-05-31 青岛碱业发展有限公司 It is a kind of can self-lubricating plus grey conveying worm
CN106762790A (en) * 2016-12-31 2017-05-31 浙江耐士伦机械有限公司 A kind of automobile engine cooling fan transmission device
CN106762790B (en) * 2016-12-31 2023-07-11 浙江耐士伦机械有限公司 Fan transmission device for cooling automobile engine
CN107355470A (en) * 2017-08-15 2017-11-17 中冶辽宁德龙钢管有限公司 A kind of Forming Roll for Spiral Weld Pipe and its lubricating system, lubricating method
WO2023065753A1 (en) * 2021-10-22 2023-04-27 珠海格力电器股份有限公司 Bearing cylinder for compressor, compressor and air conditioner
CN114321384A (en) * 2021-12-28 2022-04-12 安徽亚兰密封件股份有限公司 Mechanical sealing system for solving lubrication

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