JP2015086909A - Four-point contact ball bearing - Google Patents

Four-point contact ball bearing Download PDF

Info

Publication number
JP2015086909A
JP2015086909A JP2013224187A JP2013224187A JP2015086909A JP 2015086909 A JP2015086909 A JP 2015086909A JP 2013224187 A JP2013224187 A JP 2013224187A JP 2013224187 A JP2013224187 A JP 2013224187A JP 2015086909 A JP2015086909 A JP 2015086909A
Authority
JP
Japan
Prior art keywords
shield plate
lubricating oil
inner ring
outer ring
side shield
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2013224187A
Other languages
Japanese (ja)
Inventor
昭人 鳥居
Akito Torii
昭人 鳥居
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JTEKT Corp
Original Assignee
JTEKT Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JTEKT Corp filed Critical JTEKT Corp
Priority to JP2013224187A priority Critical patent/JP2015086909A/en
Publication of JP2015086909A publication Critical patent/JP2015086909A/en
Pending legal-status Critical Current

Links

Images

Classifications

    • 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
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/664—Retaining the liquid in or near the bearing
    • 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
    • F16C33/7869—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward
    • F16C33/7879—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted with a cylindrical portion to the inner surface of the outer race and having a radial portion extending inward with a further sealing ring
    • 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
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • F16C19/166—Four-point-contact ball bearings

Abstract

PROBLEM TO BE SOLVED: To provide a four-point contact ball bearing capable of suppressing occurrence of lubrication failure under an oil lubrication environment.SOLUTION: A four-point contact ball bearing 1 includes an inner ring 2, an outer ring 3, a plurality of balls 4 and a cage 5. The ball 4 comes into contact with a raceway surface 2a of the inner ring 2 and a raceway surface 3a of the outer ring 3 at two points respectively, and a lubricating oil A is supplied from an axial direction. A supply direction upstream side of the lubricating oil A is made to be an open state, and on the supply direction downstream side of the lubricating oil A, an inner ring side shield plate 6 comprising a cylindrical part 6a which is externally fitted and fixed at the inner ring 2 and a disk part 6b extending to the outer diameter side from the cylindrical part 6a, and an outer ring side shield plate 7 comprising a cylindrical part 7a internally fitted and fixed at the outer ring 3 and a disk part 7b extending to the inner diameter side from the cylindrical part 7a are provided. The extended end surface of the disk part 6b of the inner ring side shield plate 6 and the extended end surface of the disk part 7b of the outer ring side shield plate 7 are oppositely arranged by having a predetermined gap c.

Description

本発明は、４点接触玉軸受に関する。   The present invention relates to a four-point contact ball bearing.

４点接触玉軸受は、一般に、内輪と外輪の間に、複数の玉を保持器により周方向に一定の間隔で保持し、転動自在に配置した構造をとり、内輪と外輪の軌道面に、玉がそれぞれ２点、計４点で接触するように構成されている。４点接触玉軸受は、軽量、コンパクト、低コストであるという利点がある。   In general, a four-point contact ball bearing has a structure in which a plurality of balls are held at a predetermined interval in the circumferential direction by a cage between the inner ring and the outer ring, and arranged so as to be freely rotatable. The balls are configured to contact each other at two points, for a total of four points. The four-point contact ball bearing has the advantages of being light weight, compact and low cost.

通常、４点接触玉軸受は、内部隙間を正隙間として使用する。そのため、４点接触玉軸受では、例えばラジアル荷重とモーメント荷重が同時に負荷された場合、軌道面に４点で接触している玉のすべりが大きくなり、玉および軌道面が摩耗するおそれがある。また、軸受回転時にフレッティングが生じ、玉および軌道面が摩耗するおそれもある。   Normally, a four-point contact ball bearing uses an internal gap as a positive gap. Therefore, in a four-point contact ball bearing, for example, when a radial load and a moment load are simultaneously applied, the slip of the ball that is in contact with the raceway surface at four points increases, and the ball and the raceway surface may be worn. Further, fretting occurs when the bearing rotates, and the balls and raceway surface may be worn.

上記摩耗を抑制するために、軸受内の潤滑性の向上が図られる。潤滑性を向上させるには、グリースを軸受内部に封入するグリース潤滑を採用する場合もあるが、構造上又は使用条件によりグリース潤滑が採用できない場合は、外部から潤滑油を供給する油潤滑方式が採用される。   In order to suppress the wear, the lubricity in the bearing is improved. In order to improve lubricity, grease lubrication in which grease is enclosed inside the bearing may be used.However, if grease lubrication cannot be adopted due to the structure or usage conditions, an oil lubrication system that supplies lubricating oil from the outside is used. Adopted.

油潤滑における潤滑性を向上させるために、例えば、特許文献１には、潤滑油の供給方向上流側を開放状態とし、潤滑油を流入しやすくし、潤滑油の供給方向下流側の外輪にシールド板を設け、シールド板と内輪の隙間から潤滑油を排出させ、潤滑油の滞留性を向上させた深溝玉軸受が開示されている。   In order to improve the lubricity in oil lubrication, for example, in Patent Document 1, the upstream side in the lubricating oil supply direction is opened to facilitate the flow of the lubricating oil, and the outer ring on the downstream side in the lubricating oil supply direction is shielded. A deep groove ball bearing is disclosed in which a plate is provided and the lubricating oil is discharged from the gap between the shield plate and the inner ring to improve the retention of the lubricating oil.

特開２００７−１７７８５８号公報JP 2007-177858 A

しかしながら、特許文献１の深溝玉軸受では、潤滑油の供給方向下流側の外輪に1枚のシールド板が設けられ、シールド板と内輪の隙間から潤滑油が排出される構成であるため、玉の外輪側に潤滑油が滞留しやすく、内輪側には潤滑油が滞留しにくいという問題がある。このため、軸受の潤滑性が十分に確保されず、玉および軌道面に摩耗が発生する場合がある。また、潤滑油を排出する隙間が、内輪の外周面近くに設けられているため、潤滑油の滞留性を確保しつつ、軸受に供給される潤滑油量を適切に調整することが困難であるという問題がある。   However, in the deep groove ball bearing of Patent Document 1, since one shield plate is provided on the outer ring on the downstream side in the lubricating oil supply direction and the lubricating oil is discharged from the gap between the shield plate and the inner ring, There is a problem that the lubricating oil tends to stay on the outer ring side and the lubricating oil does not easily stay on the inner ring side. For this reason, the lubricity of the bearing is not sufficiently ensured, and wear may occur on the balls and the raceway surface. Further, since the gap for discharging the lubricating oil is provided near the outer peripheral surface of the inner ring, it is difficult to appropriately adjust the amount of the lubricating oil supplied to the bearing while ensuring the retention of the lubricating oil. There is a problem.

本発明は、上記問題点を解決するためになされたものであって、本発明が解決しようとする課題は、油潤滑の環境下において、潤滑不良が発生するのを抑制することができる４点接触玉軸受を提供することにある。   The present invention has been made to solve the above-described problems, and the problem to be solved by the present invention is that four problems can be prevented from causing poor lubrication in an oil lubrication environment. The object is to provide a contact ball bearing.

請求項１に係る発明は、内輪と、外輪と、前記内外輪間に転動自在に配置される複数の玉と、前記玉を周方向に一定の間隔で保持する保持器と、を備え、前記玉が前記内輪の外周面に形成された軌道面と前記外輪の内周面に形成された軌道面のそれぞれに２点で接触し、軸方向から潤滑油が供給される４点接触玉軸受において、前記潤滑油の供給方向上流側は、開放状態とされ、前記潤滑油の供給方向下流側に、前記内輪に外嵌固定される円筒部と該円筒部から外径側に延出される円板部とからなる内輪側シールド板と、前記外輪に内嵌固定される円筒部と該円筒部から内径側に延出される円板部とからなる外輪側シールド板と、を備え、前記内輪側シールド板の前記円板部の延出端面と、前記外輪側シールド板の前記円板部の延出端面とが、所定の隙間を有して対向配置されることを特徴とする。   The invention according to claim 1 includes an inner ring, an outer ring, a plurality of balls that are rotatably arranged between the inner and outer rings, and a cage that holds the balls at a predetermined interval in the circumferential direction. A four-point contact ball bearing in which the ball contacts the raceway surface formed on the outer peripheral surface of the inner ring and the raceway surface formed on the inner peripheral surface of the outer ring at two points, and lubricating oil is supplied from the axial direction. The lubricating oil supply direction upstream side is in an open state, and the lubricating oil supply direction downstream side is a cylindrical portion fitted and fixed to the inner ring, and a circle extending from the cylindrical portion to the outer diameter side. An inner ring side shield plate composed of a plate portion, an outer ring side shield plate composed of a cylindrical portion that is fitted and fixed to the outer ring, and a disc portion that extends from the cylindrical portion toward the inner diameter side. An extended end surface of the disk portion of the shield plate and an extended end surface of the disk portion of the outer ring side shield plate Characterized in that it is opposed with a predetermined gap.

上記のように構成した請求項１に係る発明によれば、潤滑油が軸方向から供給される４点接触玉軸受において、潤滑油の供給方向上流側を開放状態とし、潤滑油を供給されやすくしている。そして、潤滑油の供給方向下流側には、内輪側シールド板と外輪側シールド板とを固定し、両延出端面を所定の隙間を有して対向配置する構成となっている。よって、供給された潤滑油は、内輪と内輪側シールド板の間および外輪と外輪側シールド板の間に滞留するので、軌道面に再供給しやすくすることができる。また、内輪側シールド板と外輪側シールド板の両延出端面を所定の隙間とすることにより、軸受内に供給される潤滑油量を調整することができる。従って、軸受内部への潤滑油の滞留性を向上させるとともに、潤滑油量の適正化を実現でき、潤滑不良が発生することを抑制できる。   According to the invention according to claim 1 configured as described above, in the four-point contact ball bearing in which the lubricating oil is supplied from the axial direction, the upstream side in the lubricating oil supply direction is opened and the lubricating oil is easily supplied. doing. The inner ring side shield plate and the outer ring side shield plate are fixed to the downstream side in the lubricating oil supply direction, and both extended end faces are arranged to face each other with a predetermined gap. Therefore, since the supplied lubricating oil stays between the inner ring and the inner ring side shield plate and between the outer ring and the outer ring side shield plate, it can be easily supplied again to the raceway surface. In addition, the amount of lubricating oil supplied into the bearing can be adjusted by setting both extended end surfaces of the inner ring side shield plate and the outer ring side shield plate to a predetermined gap. Accordingly, the retention of the lubricating oil inside the bearing can be improved, the amount of the lubricating oil can be optimized, and the occurrence of poor lubrication can be suppressed.

本発明によれば、油潤滑の環境下において、潤滑不良が発生するのを抑制することができる４点接触玉軸受を提供することができる。   According to the present invention, it is possible to provide a four-point contact ball bearing capable of suppressing the occurrence of poor lubrication in an oil lubrication environment.

本発明の実施形態に係る４点接触玉軸受の断面図である。It is sectional drawing of the 4-point contact ball bearing which concerns on embodiment of this invention.

以下、本発明の実施形態に係る４点接触玉軸受について図面を参照しつつ説明する。   Hereinafter, a four-point contact ball bearing according to an embodiment of the present invention will be described with reference to the drawings.

図1に示すように、４点接触玉軸受１は、内輪２と、外輪３と、内外輪間に転動自在に配置される複数の玉４と、玉４を周方向に一定の間隔で保持する保持器５と、内輪２の外周面に固定される内輪側シールド板６と、外輪３の内周面に固定される外輪側シールド板７とを備えている。内輪側シールド板６と外輪側シールド板７は、内外輪間の環状空間Ｓの一方側端部に固定されており、他方側端部の軸方向から潤滑油Ａが外部供給される。   As shown in FIG. 1, the four-point contact ball bearing 1 includes an inner ring 2, an outer ring 3, a plurality of balls 4 arranged so as to be able to roll between the inner and outer rings, and the balls 4 at regular intervals in the circumferential direction. A retainer 5 to be held, an inner ring side shield plate 6 fixed to the outer peripheral surface of the inner ring 2, and an outer ring side shield plate 7 fixed to the inner peripheral surface of the outer ring 3 are provided. The inner ring side shield plate 6 and the outer ring side shield plate 7 are fixed to one end of the annular space S between the inner and outer rings, and the lubricating oil A is externally supplied from the axial direction of the other end.

内輪２は、円筒状に形成され、内輪２の外周面には、幅方向（図１の左右方向）中央の両側に曲率中心が異なる２つの円弧２ａ１、２ａ２を有する軌道面２ａが設けられている。左側の円弧２ａ１および右側の円弧２ａ２は、それぞれ点Ｐａおよび点Ｐｂで玉４と接触する。   The inner ring 2 is formed in a cylindrical shape, and a raceway surface 2a having two arcs 2a1 and 2a2 having different centers of curvature is provided on both sides of the center in the width direction (left-right direction in FIG. 1) on the outer peripheral surface of the inner ring 2. Yes. The left arc 2a1 and the right arc 2a2 are in contact with the ball 4 at points Pa and Pb, respectively.

外輪３は、内輪２の外径側に環状空間Ｓを介して円筒状に形成され、外輪３の内周面には、幅方向中央の両側に曲率中心が異なる２つの円弧３ａ１、３ａ２を有する軌道面３ａが設けられている。左側の円弧３ａ１および右側の円弧３ａ２は、それぞれ点Ｐｃおよび点Ｐｄで玉４と接触する。なお、内外輪の軌道面２ａ，３ａと玉４との内部隙間は、正隙間とされている。   The outer ring 3 is formed in a cylindrical shape on the outer diameter side of the inner ring 2 via an annular space S, and the inner surface of the outer ring 3 has two arcs 3a1, 3a2 having different centers of curvature on both sides in the center in the width direction. A raceway surface 3a is provided. The left arc 3a1 and the right arc 3a2 are in contact with the ball 4 at points Pc and Pd, respectively. The internal gap between the raceway surfaces 2a, 3a of the inner and outer rings and the ball 4 is a positive gap.

複数の玉４は、例えば軸受鋼からなる球体により形成され、内輪２の軌道面２ａと外輪３の軌道面３ａとの間に介在し、保持器５によって周方向に一定の間隔で、転動自在に配置されている。   The plurality of balls 4 are formed of, for example, a sphere made of bearing steel, and are interposed between the raceway surface 2a of the inner ring 2 and the raceway surface 3a of the outer ring 3, and are rolled by the cage 5 at regular intervals in the circumferential direction. Arranged freely.

内輪側シールド板６は、内輪２の外周面に外嵌固定される円筒部６ａと、円筒部６ａの端部から外径側に延出される円板部６ｂとからなり、断面Ｌ字状に形成されている。円筒部６ａは、潤滑油Ａの供給方向下流側（図１の右側）である内輪２の外周面端部に、圧入等により固定される。   The inner ring side shield plate 6 includes a cylindrical portion 6a that is fitted and fixed to the outer peripheral surface of the inner ring 2, and a disc portion 6b that extends from the end of the cylindrical portion 6a to the outer diameter side, and has an L-shaped cross section. Is formed. The cylindrical portion 6a is fixed to the end portion of the outer peripheral surface of the inner ring 2 on the downstream side in the supply direction of the lubricating oil A (right side in FIG. 1) by press-fitting or the like.

外輪側シールド板７は、外輪３の内周面に内嵌固定される円筒部７ａと、円筒部７ａの端部から内径側に延出される円板部７ｂとからなり、断面Ｌ字状に形成されている。円筒部７ａは、潤滑油Ａの供給方向下流側である外輪３の内周面端部に、圧入等により固定される。   The outer ring side shield plate 7 is composed of a cylindrical portion 7a fitted and fixed to the inner peripheral surface of the outer ring 3, and a disc portion 7b extending from the end of the cylindrical portion 7a to the inner diameter side, and has an L-shaped cross section. Is formed. The cylindrical portion 7a is fixed to the end portion of the inner peripheral surface of the outer ring 3 on the downstream side in the supply direction of the lubricating oil A by press-fitting or the like.

内輪側シールド板６の円板部６ｂの延出端面と、外輪側シールド板７の円板部７ｂの延出端面とは、内外輪間の環状空間Ｓの径方向の略中央において、所定の隙間ｃを有して対向して配置されている。この隙間ｃから潤滑油Ａが排出される。隙間ｃの大きさにより、内外輪間に供給される潤滑油量が調整される。内輪側シールド板６と外輪側シールド板７の材料としては、ＳＰＣＣ等の炭素鋼が用いられる。また、内外輪間に潤滑油Ａが供給される供給方向上流側（図１の左側）は、内外輪間の環状空間Ｓが存在するのみで、開放状態とされている。   The extended end surface of the disc portion 6b of the inner ring side shield plate 6 and the extended end surface of the disc portion 7b of the outer ring side shield plate 7 are arranged at a predetermined center in the radial center of the annular space S between the inner and outer rings. They are arranged facing each other with a gap c. The lubricating oil A is discharged from the gap c. The amount of lubricating oil supplied between the inner and outer rings is adjusted according to the size of the gap c. As a material for the inner ring side shield plate 6 and the outer ring side shield plate 7, carbon steel such as SPCC is used. Further, the upstream side in the supply direction (the left side in FIG. 1) where the lubricating oil A is supplied between the inner and outer rings is in an open state only with the annular space S between the inner and outer rings.

上記のように構成された４点接触玉軸受１によれば、潤滑油Ａを外部から供給する油潤滑の環境下において、潤滑油Ａの供給方向上流側を開放状態とし、潤滑油Ａを供給されやすくしている。そして、潤滑油Ａの供給方向下流側に、内輪側シールド板６と外輪側シールド板７をそれぞれ内輪２の外周面端部と外輪３の内周面端部に固定し、両延出端面を所定の隙間ｃを有して対向配置する構成としている。これにより、供給された潤滑油Ａは、内輪２と内輪側シールド板６の間および外輪３と外輪側シールド板７の間に滞留するので、内外輪の軌道面２ａ，３ａに潤滑油Ａを再供給しやすくすることができる。   According to the four-point contact ball bearing 1 configured as described above, in the environment of oil lubrication in which the lubricant A is supplied from the outside, the upstream side in the supply direction of the lubricant A is opened and the lubricant A is supplied. It is easy to be done. The inner ring side shield plate 6 and the outer ring side shield plate 7 are respectively fixed to the outer peripheral surface end portion of the inner ring 2 and the inner peripheral surface end portion of the outer ring 3 on the downstream side in the supply direction of the lubricating oil A. It is set as the structure arrange | positioned facing with the predetermined clearance gap c. As a result, the supplied lubricating oil A stays between the inner ring 2 and the inner ring side shield plate 6 and between the outer ring 3 and the outer ring side shield plate 7, so that the lubricating oil A is applied to the raceway surfaces 2a and 3a of the inner and outer rings. Easy to re-supply.

また、内輪側シールド板６と外輪側シールド板７の円板部６ｂ，７ｂの両延出端面が所定の隙間ｃを介して対向配置されているので、隙間ｃの大きさを適宜設定することにより、軸受内部への潤滑油Ａの滞留性を確保しつつ、軸受内部に供給される潤滑油量を調整することができる。   In addition, since both extended end surfaces of the disc portions 6b and 7b of the inner ring side shield plate 6 and the outer ring side shield plate 7 are arranged to face each other with a predetermined gap c, the size of the gap c should be set appropriately. Thus, it is possible to adjust the amount of lubricating oil supplied to the inside of the bearing while ensuring the retention of the lubricating oil A inside the bearing.

従って、上記４点接触玉軸受１は、軸受内部への潤滑油Ａの滞留性を向上させるとともに、潤滑油量の適正化を実現でき、潤滑不良が発生することを抑制できる。これにより、玉４と内外輪の軌道面２a，３ａの摩耗を抑制でき、軸受の信頼性を向上させることができる。   Therefore, the four-point contact ball bearing 1 can improve the retention of the lubricating oil A inside the bearing, can realize the optimization of the amount of the lubricating oil, and can suppress the occurrence of poor lubrication. Thereby, the wear of the balls 4 and the raceway surfaces 2a and 3a of the inner and outer rings can be suppressed, and the reliability of the bearing can be improved.

本発明は、上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内で適宜変更することが可能である。   The present invention is not limited to the above-described embodiment, and can be changed as appropriate without departing from the gist of the present invention.

例えば、上記実施形態では、外部から潤滑油Ａが供給される４点接触玉軸受１を示したが、４点接触玉軸受１以外にも、深溝玉軸受、アンギュラ玉軸受、円筒ころ軸受、円すいころ軸受等において、潤滑油Ａの経路になっている軸受に適用してもよい。   For example, in the above-described embodiment, the four-point contact ball bearing 1 to which the lubricant A is supplied from the outside is shown, but in addition to the four-point contact ball bearing 1, a deep groove ball bearing, an angular ball bearing, a cylindrical roller bearing, a cone You may apply to the roller bearing etc. which are the path | routes of the lubricating oil A in a roller bearing etc.

１：４点接触玉軸受、 ２：内輪、２ａ，３ａ：軌道面、
２ａ１，２ａ２，３ａ１，３ａ２：円弧、 ３：外輪、 ４：玉、 ５：保持器、
６：内輪側シールド板、 ６ａ，７ａ：円筒部、 ６ｂ，７ｂ：円板部、
７：外輪側シールド板、 ｃ：隙間、 Ａ：潤滑油、 Ｐａ，Ｐｂ，Ｐｃ，Ｐｄ：点、
Ｓ：環状空間 1: Four-point contact ball bearing, 2: inner ring, 2a, 3a: raceway surface,
2a1, 2a2, 3a1, 3a2: arc, 3: outer ring, 4: ball, 5: cage,
6: Inner ring side shield plate, 6a, 7a: cylindrical portion, 6b, 7b: disc portion,
7: outer ring side shield plate, c: gap, A: lubricating oil, Pa, Pb, Pc, Pd: point,
S: Annular space

Claims (1)

内輪と、外輪と、前記内外輪間に転動自在に配置される複数の玉と、前記玉を周方向に一定の間隔で保持する保持器と、を備え、前記玉が前記内輪の外周面に形成された軌道面と前記外輪の内周面に形成された軌道面のそれぞれに２点で接触し、軸方向から潤滑油が供給される４点接触玉軸受において、
前記潤滑油の供給方向上流側は、開放状態とされ、
前記潤滑油の供給方向下流側に、前記内輪に外嵌固定される円筒部と
該円筒部から外径側に延出される円板部とからなる内輪側シールド板と、
前記外輪に内嵌固定される円筒部と該円筒部から内径側に延出される円板部と
からなる外輪側シールド板と、を備え、
前記内輪側シールド板の前記円板部の延出端面と、前記外輪側シールド板の前記円板部の延出端面とが、所定の隙間を有して対向配置されることを特徴とする４点接触玉軸受。 An inner ring, an outer ring, a plurality of balls that are rotatably arranged between the inner and outer rings, and a cage that holds the balls at regular intervals in the circumferential direction, and the balls are outer peripheral surfaces of the inner ring. In a four-point contact ball bearing that contacts the raceway surface formed on the raceway surface and the raceway surface formed on the inner peripheral surface of the outer ring at two points, and is supplied with lubricating oil from the axial direction,
The upstream side of the lubricating oil supply direction is open,
On the downstream side of the lubricating oil supply direction, an inner ring side shield plate comprising a cylindrical portion that is externally fitted and fixed to the inner ring, and a disc portion that extends from the cylindrical portion to the outer diameter side,
An outer ring side shield plate composed of a cylindrical part fitted and fixed to the outer ring and a disk part extending from the cylindrical part to the inner diameter side,
The extending end surface of the disk portion of the inner ring side shield plate and the extending end surface of the disk portion of the outer ring side shield plate are arranged to face each other with a predetermined gap. Point contact ball bearing.
JP2013224187A 2013-10-29 2013-10-29 Four-point contact ball bearing Pending JP2015086909A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2013224187A JP2015086909A (en) 2013-10-29 2013-10-29 Four-point contact ball bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2013224187A JP2015086909A (en) 2013-10-29 2013-10-29 Four-point contact ball bearing

Publications (1)

Publication Number Publication Date
JP2015086909A true JP2015086909A (en) 2015-05-07

Family

ID=53049912

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2013224187A Pending JP2015086909A (en) 2013-10-29 2013-10-29 Four-point contact ball bearing

Country Status (1)

Country Link
JP (1) JP2015086909A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0338425U (en) * 1989-08-25 1991-04-15
JP2000230562A (en) * 1999-02-10 2000-08-22 Nsk Ltd Rolling bearing
JP2004144282A (en) * 2002-08-30 2004-05-20 Nsk Ltd Rolling bearing

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0338425U (en) * 1989-08-25 1991-04-15
JP2000230562A (en) * 1999-02-10 2000-08-22 Nsk Ltd Rolling bearing
JP2004144282A (en) * 2002-08-30 2004-05-20 Nsk Ltd Rolling bearing

Similar Documents

Publication Publication Date Title
JP2013029129A (en) Sealed rolling bearing
JP2010196845A (en) Rolling bearing
JP6028409B2 (en) Self-aligning roller bearing with sealing device and manufacturing method thereof
JP2018109448A (en) Conical roller bearing
JP2018021569A (en) Rolling bearing
JP2012202453A (en) Self-aligning roller bearing
JP2014214792A (en) Retainer of rolling bearing
JP4915346B2 (en) Solid lubricated roller bearing
JP2015086909A (en) Four-point contact ball bearing
WO2016147881A1 (en) Retainer and rolling bearing
JP2015132320A (en) Self-aligning roller bearing
RU98791U1 (en) ROLLER SPHERICAL DOUBLE-ROW ROLLING BEARING
JP6790535B2 (en) Rolling bearing
JP2013015201A (en) Conical bearing
JP6829522B2 (en) Self-aligning roller bearing
JP2014105732A (en) Rolling bearing
RU2484320C2 (en) Spherical antifriction bearing (versions)
RU116584U1 (en) BEARING BALL-ROLLER RADIALLY THRESHOLD THREE ROW COMBINED WITH SEALS
JP2018004062A (en) Rolling bearing
JP2009168106A (en) Roller bearing and its fixing structure
JP2014167316A (en) Rolling bearing
JP6533682B2 (en) Sealing device and rolling bearing device provided with the same
JP2015068354A (en) Rolling bearing
JP2015218845A (en) Self-aligning roller bearing
JP2014194249A (en) Self-aligning roller bearing

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20160913

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20170621

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20170711

A02 Decision of refusal

Free format text: JAPANESE INTERMEDIATE CODE: A02

Effective date: 20180123