JP2005265083A - Ball bearing - Google Patents

Ball bearing Download PDF

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Publication number
JP2005265083A
JP2005265083A JP2004079980A JP2004079980A JP2005265083A JP 2005265083 A JP2005265083 A JP 2005265083A JP 2004079980 A JP2004079980 A JP 2004079980A JP 2004079980 A JP2004079980 A JP 2004079980A JP 2005265083 A JP2005265083 A JP 2005265083A
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Japan
Prior art keywords
inner ring
cylindrical portion
lubricant
ball bearing
outer ring
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JP2004079980A
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Japanese (ja)
Inventor
Yoshitaka Nakagawa
義崇 中川
Tomoyuki Aida
友之 合田
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Koyo Seiko Co Ltd
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Koyo Seiko Co Ltd
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Priority to JP2004079980A priority Critical patent/JP2005265083A/en
Publication of JP2005265083A publication Critical patent/JP2005265083A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/58—Raceways; Race rings
    • F16C33/588—Races of sheet metal
    • 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
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • 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
    • F16C33/762—Sealings of ball or roller bearings by means of a fluid
    • F16C33/763—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap
    • F16C33/766—Sealings of ball or roller bearings by means of a fluid retained in the sealing gap by pumping action

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

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ball bearing made by press-molding, for exerting a thrust bearing function with respect to both of an axially inward force and an axially outward force, and preventing outflow of lubricant when used for the rotation of an inner race. <P>SOLUTION: The inner race 1 includes; an inner race cylinder part 11 having an outer circumference in which an inner race raceway track 11a is formed; and an inner race flange part 12. An outer race 2 includes: an outer race cylinder part 13 formed concentrically with the inner race cylinder part 11, and having an inner circumference in which an outer race raceway track groove 13a is formed; and an outer race flange part 14 extending from a left end of the outer race cylinder part 13 to an outer diameter direction. A seal 6 between flanges is constituted of a cylinder part 18 fit to an outer diameter of the outer race 2 and a seal lip 19 brought into slide-contact with the inner race flange part 12. An annular grove 21 of a lubricant outflow prevention groove is provided in an inside face of the inner race flange part 12 to suppress flow of the lubricant to the outside. <P>COPYRIGHT: (C)2005,JPO&amp;NCIPI

Description

この発明は、玉軸受に関し、特に、内輪および外輪がプレス成形により形成されている玉軸受に関する。   The present invention relates to a ball bearing, and more particularly to a ball bearing in which an inner ring and an outer ring are formed by press molding.

プレス製の玉軸受としては、例えば、特許文献１に記載されているように、２つ１対のプレス製環状板からなるレースの間に複数の玉が配置された構成とされてスラスト玉軸受として使用されるものが知られている。   As a ball bearing made of a press, for example, as described in Patent Document 1, a thrust ball bearing having a configuration in which a plurality of balls are arranged between races made of two pairs of press-made annular plates. What is used as is known.

この玉軸受は、例えば、いずれか一方の環状板がケーシングに支持され、他方が回転体に一体化されることにより、回転体にかかる軸方向の力を受けるスラスト軸受とされる。この場合、軸方向内向きの力に対しては、スラスト軸受の機能を発揮することができるが、軸方向外向きの力に対しては、スラスト軸受の機能を発揮することができないため、軸方向外向きの力がかかる条件下での使用には問題があった。   The ball bearing is, for example, a thrust bearing that receives an axial force applied to the rotating body by supporting one of the annular plates on the casing and integrating the other with the rotating body. In this case, the thrust bearing function can be exerted with respect to the axially inward force, but the axial bearing function cannot be exerted with respect to the axially outward force. There was a problem in use under conditions where an outward force was applied.

そこで、本出願人は、特願２００３−３０２３４９において、外周に内輪軌道溝が形成された内輪円筒部および内輪円筒部の一端部から外径方向にのびる内輪フランジ部を有するプレス製内輪と、内輪円筒部と同心でかつ内周に外輪軌道溝が形成されるとともに一端部が内輪フランジ部に軸方向内方から対向する外輪円筒部および外輪円筒部の他端部から外径方向にのびる外輪フランジ部を有するプレス製外輪と、内輪円筒部と外輪円筒部との間に配置された複数の玉と、玉を保持する保持器とを備えており、軸方向内向きの力および軸方向外向きの力の両方に対して、スラスト軸受の機能を発揮することができる玉軸受を提案した。
特開２００２−２２７８６１号公報 In view of this, the present applicant, in Japanese Patent Application No. 2003-302349, has a press-made inner ring having an inner ring cylindrical portion having an inner ring raceway groove formed on the outer periphery and an inner ring flange portion extending from one end of the inner ring cylindrical portion in the outer diameter direction, and an inner ring. An outer ring raceway groove that is concentric with the cylindrical part and has an outer ring raceway groove formed on the inner periphery and one end of which is opposed to the inner ring flange part from the inside in the axial direction, and an outer ring flange that extends in the outer diameter direction from the other end of the outer ring cylindrical part A press outer ring having a portion, a plurality of balls disposed between the inner ring cylindrical portion and the outer ring cylindrical portion, and a cage for holding the ball, and an axially inward force and an axially outward direction We proposed a ball bearing capable of exerting the function of a thrust bearing against both of these forces.
JP 2002-227861 A

ところで、この種の玉軸受は、内輪回転でも外輪回転でも使用可能であるが、この玉軸受を内輪回転で使用する場合には、軸受内の潤滑剤（グリース）が外部に流出して、潤滑不良が発生する可能性があることから、潤滑剤の流出を防止することが重要となってくる。   By the way, this type of ball bearing can be used for both inner ring rotation and outer ring rotation. However, when this ball bearing is used for inner ring rotation, the lubricant (grease) in the bearing flows out and lubricates. Since defects may occur, it is important to prevent the lubricant from flowing out.

この発明の目的は、軸方向内向きの力および軸方向外向きの力の両方に対して、スラスト軸受の機能を発揮することができ、しかも、内輪回転で使用した場合に、潤滑剤の流出を防止することができるプレス成形製の玉軸受を提供することにある。   The object of the present invention is to exert the function of a thrust bearing with respect to both an axially inward force and an axially outward force, and further, when used in inner ring rotation, the outflow of lubricant. It is an object of the present invention to provide a press-molded ball bearing capable of preventing the above-described problem.

この発明による玉軸受は、外周に内輪軌道溝が形成された内輪円筒部および内輪円筒部の一端部から外径方向にのびる内輪フランジ部を有するプレス製内輪と、内輪円筒部と同心でかつ内周に外輪軌道溝が形成されるとともに一端部が内輪フランジ部に軸方向内方から対向する外輪円筒部および外輪円筒部の他端部から外径方向にのびる外輪フランジ部を有するプレス製外輪と、内輪円筒部と外輪円筒部との間に配置された複数の玉と、玉を保持する保持器と、外輪外径に嵌められた円筒部および円筒部に設けられて内輪フランジ部に摺接しているシールリップからなるフランジ間シールとを備えており、内輪フランジ部の内側面に、潤滑剤の外部への流出を抑える潤滑剤流出防止溝が設けられていることを特徴とするものである。   A ball bearing according to the present invention includes an inner ring cylindrical part having an inner ring raceway groove formed on the outer periphery, an inner ring made of a press having an inner ring flange extending from one end of the inner ring cylindrical part in an outer diameter direction, a concentric inner ring and an inner ring cylindrical part. A press outer ring having an outer ring raceway groove formed on the circumference and having an outer ring cylindrical portion whose one end is opposed to the inner ring flange portion from the inside in the axial direction and an outer ring flange portion extending from the other end of the outer ring cylindrical portion in the outer radial direction; A plurality of balls disposed between the inner ring cylindrical portion and the outer ring cylindrical portion, a cage for holding the balls, a cylindrical portion fitted to the outer diameter of the outer ring, and a cylindrical portion provided in sliding contact with the inner ring flange portion. And an inter-flange seal composed of a sealing lip, and a lubricant outflow prevention groove for suppressing the outflow of lubricant to the outside is provided on the inner surface of the inner ring flange portion. .

フランジ間シールは、樹脂製とされることがあり、また、ゴム製とされることがある。シールリップと内輪フランジ部との接触の程度は、高速回転での使用に適するように、いわゆる軽接触とされる。軽接触の場合、内部の潤滑剤が流出しやすいことから、これを防止することがより重要となる。フランジ間シールの円筒部の反シールリップ側端部は、外輪フランジ部に当接させられることが好ましい。   The flange-to-flange seal may be made of resin or rubber. The degree of contact between the seal lip and the inner ring flange portion is so-called light contact so as to be suitable for use at high speed rotation. In the case of light contact, since the internal lubricant tends to flow out, it is more important to prevent this. The end portion on the side opposite to the seal lip of the cylindrical portion of the flange-to-flange seal is preferably brought into contact with the outer ring flange portion.

潤滑剤流出防止溝は、環状とされていることがあり、また、スパイラル状とされていることがある。スパイラル状の潤滑剤流出防止溝の形状（径方向となす角、曲率など）は、潤滑剤に作用する力（遠心力、慣性力、摩擦力などの合力）を溝に沿う成分とこれに直交する向きとに分けた場合に、溝に沿う成分が回転の中心に向かう方向となるように決定される。   The lubricant outflow prevention groove may be annular or may be spiral. The shape of the spiral lubricant flow prevention groove (radius angle, curvature, etc.) is orthogonal to the force acting on the lubricant (the resultant force of centrifugal force, inertial force, friction force, etc.) and the component along the groove. In this case, the component along the groove is determined to be in the direction toward the center of rotation.

環状の潤滑剤流出防止溝によると、内輪回転時にグリースが遠心力により移動する際、内輪フランジ部の内側面近傍のグリースは、この溝内に溜まるので、フランジ間シールと内輪との間から外部へ流出するグリースの量を抑えることができ、潤滑不良が防止される。しかも、この溝にグリースを溜めることで、初期グリース封入量を増加することができ、グリースの流出があったとしても、残留グリース量を確保することができる。   According to the annular lubricant outflow prevention groove, when grease moves due to centrifugal force when the inner ring rotates, the grease near the inner surface of the inner ring flange portion accumulates in this groove. The amount of grease flowing out to the water can be suppressed, and poor lubrication is prevented. In addition, by storing grease in the groove, the initial grease filling amount can be increased, and even if the grease flows out, the residual grease amount can be secured.

スパイラル状の潤滑剤流出防止溝によると、内輪回転時に、潤滑剤には、これを強制的に軸受内部に戻す力が作用し、これにより、潤滑剤の外部への流出が防止され、潤滑不良が防止される。しかも、この溝にグリースを溜めることで、初期グリース封入量を増加することができ、グリースの流出があったとしても、残留グリース量を確保することができる。   According to the spiral lubricant flow prevention groove, when the inner ring rotates, the lubricant is forced to return it to the inside of the bearing, which prevents the lubricant from flowing out and causes poor lubrication. Is prevented. In addition, by storing grease in the groove, the initial grease filling amount can be increased, and even if the grease flows out, the residual grease amount can be secured.

上記の玉軸受において、フランジ間シールとは別に、内輪円筒部の他端部と外輪円筒部の他端部との間に設けられた円筒部間シールがさらに設けられていることが好ましい。円筒部間シールは、外輪円筒部内周に固定されてそのシールリップが内輪円筒部外周に対向させられる。   In the ball bearing described above, it is preferable that a seal between the cylindrical portions provided between the other end portion of the inner ring cylindrical portion and the other end portion of the outer ring cylindrical portion is further provided separately from the seal between the flanges. The seal between the cylindrical portions is fixed to the inner periphery of the outer ring cylindrical portion, and the seal lip is opposed to the outer periphery of the inner ring cylindrical portion.

この発明の玉軸受によると、外周に軌道溝が形成された内輪円筒部および内輪円筒部の一端部から外径方向にのびる内輪フランジ部を有するプレス製内輪と、内輪円筒部と同心でかつ内周に軌道溝が形成されるとともに一端部が内輪フランジ部に対向する外輪円筒部および外輪円筒部の他端部から外径方向にのびる外輪フランジ部を有するプレス製外輪と、両輪円筒部間に配置された複数の玉とを備えているので、軸方向内向きの力および軸方向外向きの力の両方に対して、スラスト軸受の機能を発揮することができる。また、外輪外径に嵌められた円筒部および円筒部に設けられて内輪フランジ部に摺接しているシールリップからなるフランジ間シールをさらに備えているとともに、内輪フランジ部の内側面に、潤滑剤の外部への流出を抑える潤滑剤流出防止溝が設けられているので、グリース封入量を増加することができ、内輪が回転輪とされた場合に、グリースの流出をより確実に防止することができ、内輪回転で使用するのに極めて優れたものとなる。   According to the ball bearing of the present invention, an inner ring cylindrical portion having a raceway groove formed on the outer periphery, a press-made inner ring having an inner ring flange portion extending in an outer diameter direction from one end of the inner ring cylindrical portion, a concentric inner ring and an inner ring cylindrical portion A raceway groove is formed in the circumference and an outer ring cylindrical portion having one end portion facing the inner ring flange portion and an outer ring flange portion extending in an outer diameter direction from the other end portion of the outer ring cylindrical portion, Since the plurality of balls are arranged, the function of the thrust bearing can be exhibited with respect to both the axially inward force and the axially outward force. In addition, a cylinder portion fitted to the outer diameter of the outer ring and a flange-to-flange seal provided on the cylinder portion and made of a seal lip that is in sliding contact with the inner ring flange portion are provided, and a lubricant is provided on the inner surface of the inner ring flange portion. Since the lubricant outflow prevention groove that suppresses the outflow to the outside is provided, the amount of grease can be increased, and when the inner ring is a rotating ring, the outflow of grease can be more reliably prevented Can be used for inner ring rotation.

この発明の実施の形態を、以下図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、この発明の玉軸受の第１実施形態を示している。以下の説明において、左右とは、図の左右をいうものとする。   FIG. 1 shows a first embodiment of the ball bearing of the present invention. In the following description, the left and right refer to the left and right in the figure.

玉軸受は、内輪(1)、外輪(2)、両輪(2)(3)の中央部間に配置された複数の玉(3)、玉(3)を保持する保持器(4)、および両輪(2)(3)間に配置された２つの樹脂製シール(5)(6)を備えている。   The ball bearing comprises an inner ring (1), an outer ring (2), a plurality of balls (3) disposed between the central portions of both wheels (2) (3), a cage (4) for holding the balls (3), and Two resin seals (5) and (6) are provided between the two wheels (2) and (3).

内輪(1)は、例えば、軸方向の両方向に移動可能とされたギヤなどの回転体と一体化され、外輪(2)は、ケーシングなどに支持される。   For example, the inner ring (1) is integrated with a rotating body such as a gear that is movable in both axial directions, and the outer ring (2) is supported by a casing or the like.

内輪(1)および外輪(2)は、いずれもプレス成形により形成されている。   Both the inner ring (1) and the outer ring (2) are formed by press molding.

内輪(1)は、外周に内輪軌道溝(11a)が形成された内輪円筒部(11)と、内輪円筒部(11)の右端部から外径方向にのびる内輪フランジ部(12)とを有している。   The inner ring (1) has an inner ring cylindrical portion (11) having an inner ring raceway groove (11a) formed on the outer periphery and an inner ring flange portion (12) extending from the right end of the inner ring cylindrical portion (11) in the outer diameter direction. doing.

外輪(2)は、内輪円筒部(11)と同心でかつ内周に外輪軌道溝(13a)が形成されるとともに右端部が内輪フランジ部(12)に左方（軸方向内方）から対向する外輪円筒部(13)と、外輪円筒部(13)の左端部から外径方向にのびる外輪フランジ部(14)とを有している。   The outer ring (2) is concentric with the inner ring cylindrical section (11) and has an outer ring raceway groove (13a) formed on the inner circumference, and the right end faces the inner ring flange section (12) from the left (inward in the axial direction). The outer ring cylindrical portion (13) and the outer ring flange portion (14) extending in the outer diameter direction from the left end portion of the outer ring cylindrical portion (13).

玉(3)は、内輪円筒部(11)と外輪円筒部(13)とによって、深溝タイプの玉軸受と同様に支持されている。   The ball (3) is supported by the inner ring cylindrical portion (11) and the outer ring cylindrical portion (13) in the same manner as the deep groove type ball bearing.

２つのシール(5)(6)のうちの一方は、内輪円筒部(11)の左端部と外輪円筒部(13)の左端部との間に設けられた円筒部間シール(5)であり、他方は、外輪フランジ部(14)と内輪フランジ部(12)との間に設けられたフランジ間シール(6)である。   One of the two seals (5) and (6) is an inter-cylindrical seal (5) provided between the left end of the inner ring cylindrical portion (11) and the left end of the outer ring cylindrical portion (13). The other is an inter-flange seal (6) provided between the outer ring flange portion (14) and the inner ring flange portion (12).

円筒部間シール(5)は、孔あきの円板部(15)と、孔あき円板部(15)の外周縁部から右方（軸方向内方）にのびる短円筒部(16)とからなる。短円筒部(16)の外径は、外輪円筒部(13)の内径よりも大きくされている。そして、外輪円筒部(13)の左端部に、これより右にある部分よりも大径のシール嵌め合わせ部(17)が形成されており、このシール嵌め合わせ部(17)の内周に、円筒部間シール(5)の短円筒部(16)の外周部が嵌め入れられて接着されている。シール嵌め合わせ部(17)には、さらに、径方向外方に行くにしたがって細くなる三角形断面の環状溝(17a)が形成されており、円筒部間シール(5)の短円筒部(16)の外周には、この環状溝(17a)にきつく嵌め入れられている環状突起(16a)が形成されている。孔あきの円板部(15)の内周縁部(15a)は、内輪円筒部(11)の外周に若干の径方向間隙をおいて対向させられているシールリップとされており、これにより、内輪円筒部(11)の左端部と外輪円筒部(13)の左端部との間に、非接触シールとしての円筒部間シール(5)が形成されている。   The seal between cylinders (5) consists of a perforated disc (15) and a short cylindrical part (16) extending rightward (inward in the axial direction) from the outer periphery of the perforated disc (15). Become. The outer diameter of the short cylindrical portion (16) is larger than the inner diameter of the outer ring cylindrical portion (13). Then, a seal fitting portion (17) having a larger diameter than the portion on the right side is formed on the left end portion of the outer ring cylindrical portion (13), and on the inner periphery of the seal fitting portion (17), The outer peripheral portion of the short cylindrical portion (16) of the seal between cylindrical portions (5) is fitted and bonded. The seal fitting portion (17) is further formed with an annular groove (17a) having a triangular cross section that becomes thinner as going radially outward, and the short cylindrical portion (16) of the seal between the cylindrical portions (5) An annular protrusion (16a) that is tightly fitted in the annular groove (17a) is formed on the outer periphery of the ring. The inner peripheral edge portion (15a) of the perforated disc portion (15) is a seal lip that is opposed to the outer periphery of the inner ring cylindrical portion (11) with a slight radial gap therebetween. Between the left end portion of the cylindrical portion (11) and the left end portion of the outer ring cylindrical portion (13), an inter-cylindrical seal (5) is formed as a non-contact seal.

フランジ間シール(6)は、内径が外輪円筒部(13)の外径にほぼ等しい円筒部(18)と、円筒部(18)の右端部に設けられて内輪フランジ部(12)の左面に摺接しているシールリップ(19)とからなる。フランジ間シール(6)は、その円筒部(18)が外輪円筒部(13)の外径にきつく嵌め合わされるとともに、円筒部(18)の左端部が外輪フランジ部(14)の立上り基部に当接させられて接着されている。   The flange-to-flange seal (6) is provided on the left side of the inner ring flange portion (12) provided at the cylindrical portion (18) whose inner diameter is substantially equal to the outer diameter of the outer ring cylindrical portion (13) and at the right end of the cylindrical portion (18). The seal lip (19) is in sliding contact. The seal (6) between the flanges has a cylindrical portion (18) that is tightly fitted to the outer diameter of the outer ring cylindrical portion (13), and the left end of the cylindrical portion (18) is at the rising base of the outer ring flange portion (14). It is abutted and bonded.

この実施形態の玉軸受は、内輪回転でかつ高速回転での使用に適するように、フランジ間シール(6)の内輪フランジ部(12)への接触が軽接触とされており、内輪フランジ部(12)の内側面に、潤滑剤（グリース）(G)の外部への流出を抑える潤滑剤流出防止溝としての環状溝(21)が設けられている。   In the ball bearing of this embodiment, the contact between the inner ring flange portion (12) of the seal between the flanges (6) is light contact so that the inner ring rotation and the high speed rotation are suitable, and the inner ring flange portion ( An annular groove (21) is provided on the inner side surface of 12) as a lubricant outflow prevention groove for suppressing outflow of the lubricant (grease) (G) to the outside.

環状溝(21)は、断面方形とされて、内輪フランジ部(12)の内側面の全周にのびている。環状溝(21)の内径は、内輪円筒部(11)の外径よりわずかに大きく、かつ、シールリップ(19)の内径よりもわずかに小さくなされている。   The annular groove (21) has a square cross section and extends all around the inner surface of the inner ring flange portion (12). The inner diameter of the annular groove (21) is slightly larger than the outer diameter of the inner ring cylindrical portion (11) and slightly smaller than the inner diameter of the seal lip (19).

環状の潤滑剤流出防止溝(21)によると、内輪回転時にグリース(G)が遠心力により移動した際、内輪フランジ部(12)の内側面近傍のグリース(G)は、この溝(21)内に溜まるので、フランジ間シール(6)と内輪フランジ部(12)との間から外部へ流出するグリースの量を抑えることができる。しかも、この溝(21)にグリース(G)を溜めることで、初期グリース封入量を増加することができ、グリース(G)の流出があったとしても、残留グリース量を確保することができる。   According to the annular lubricant outflow prevention groove (21), when the grease (G) moves due to centrifugal force when the inner ring rotates, the grease (G) in the vicinity of the inner surface of the inner ring flange (12) Since it accumulates inside, it is possible to suppress the amount of grease flowing out from between the flange seal (6) and the inner ring flange portion (12). In addition, by storing the grease (G) in the groove (21), the initial grease filling amount can be increased, and even if the grease (G) flows out, the residual grease amount can be secured.

図２は、この発明による玉軸受の第２実施形態を示している。この第２実施形態のものは、第１実施形態のものと潤滑剤流出防止溝の形状が異なっている。   FIG. 2 shows a second embodiment of the ball bearing according to the present invention. The thing of this 2nd Embodiment differs in the shape of the lubricant outflow prevention groove | channel from the thing of 1st Embodiment.

図２において、潤滑剤流出防止溝(22)は、正面から見て、複数本の溝(22a)からなるスパイラル状とされている。各溝(22a)は、回転方向が図２の反時計方向であるのに対し、その径方向外側に向かう方向が、径方向に対して反時計方向（回転方向と同じ方向）に傾斜させられている。スパイラル状の潤滑剤流出防止溝(22)の各溝(22a)が径方向となす角および曲率は、潤滑剤に作用する力（遠心力、慣性力、摩擦力などの合力）を溝(22a)に沿う成分とこれに直交する向きとに分けた場合に、溝(22a)に沿う成分が回転の中心に向かう方向となるように決定されている。   In FIG. 2, the lubricant outflow prevention groove (22) is formed in a spiral shape composed of a plurality of grooves (22a) when viewed from the front. Each groove (22a) is inclined in the counterclockwise direction (the same direction as the rotational direction) with respect to the radial direction while the rotational direction is counterclockwise in FIG. ing. The angle and curvature that each groove (22a) of the spiral lubricant flow prevention groove (22) makes with the radial direction is the force acting on the lubricant (the resultant force of centrifugal force, inertial force, friction force, etc.) groove (22a ) And a direction perpendicular to the component are determined so that the component along the groove (22a) is directed toward the center of rotation.

したがって、このスパイラル状の潤滑剤流出防止溝(22)によると、内輪回転時に溝内のグリース(G)に作用する力がグリース(G)を戻す側に働くことにより、グリース(G)が強制的に軸受内部に戻され、これにより、グリース(G)の流出が防止されて、潤滑不良が防止される。しかも、この溝(22)にグリース(G)を溜めることで、初期グリース封入量を増加することができ、グリース(G)の流出があったとしても、残留グリース量を確保することができる。   Therefore, according to the spiral lubricant outflow prevention groove (22), the force acting on the grease (G) in the groove when the inner ring rotates acts on the return side of the grease (G), so that the grease (G) is forced. Thus, the grease (G) is prevented from flowing out, and poor lubrication is prevented. In addition, by storing the grease (G) in the groove (22), the initial grease filling amount can be increased, and even if the grease (G) flows out, the residual grease amount can be secured.

なお、上記の第１および第２実施形態の軸受において、内輪フランジ部(12)および外輪フランジ部(14)は、同じ外径を有するように図示されているが、各フランジ部(12)(14)は、これらが取り付けられる部材に応じて、これをさらに外径方向に延長した外径方向延長部やフランジ部の外周縁部を軸方向に折り曲げた折曲げ縁部などを有するようにしてもよい。   In the bearings of the first and second embodiments described above, the inner ring flange portion (12) and the outer ring flange portion (14) are shown to have the same outer diameter, but each flange portion (12) ( 14), depending on the member to which they are attached, it has an outer diameter direction extension part obtained by further extending the outer diameter direction, a bent edge part obtained by bending the outer peripheral edge part of the flange part in the axial direction, and the like. Also good.

図１は、この発明による玉軸受の第１実施形態を示す縦断面図である。FIG. 1 is a longitudinal sectional view showing a first embodiment of a ball bearing according to the present invention. 図２は、この発明による玉軸受の第２実施形態を示す要部の横断面図である。FIG. 2 is a cross-sectional view of a main part showing a second embodiment of the ball bearing according to the present invention.

符号の説明Explanation of symbols

(1) 外輪
(2) 内輪
(3) 玉（転動体）
(4) 保持器
(11) 内輪円筒部
(11a) 内輪軌道溝
(12) 内輪フランジ部
(13) 外輪円筒部
(13a) 外輪軌道溝
(14) 外輪フランジ部
(21) 環状溝（潤滑剤流出防止溝）
(22) スパイラル溝（潤滑剤流出防止溝） (1) Outer ring
(2) Inner ring
(3) Ball (rolling element)
(4) Cage
(11) Inner ring cylinder
(11a) Inner ring raceway groove
(12) Inner ring flange
(13) Outer ring cylindrical part
(13a) Outer ring raceway groove
(14) Outer ring flange
(21) Annular groove (lubricant outflow prevention groove)
(22) Spiral groove (lubricant outflow prevention groove)

Claims (4)

外周に内輪軌道溝が形成された内輪円筒部および内輪円筒部の一端部から外径方向にのびる内輪フランジ部を有するプレス製内輪と、内輪円筒部と同心でかつ内周に外輪軌道溝が形成されるとともに一端部が内輪フランジ部に軸方向内方から対向する外輪円筒部および外輪円筒部の他端部から外径方向にのびる外輪フランジ部を有するプレス製外輪と、内輪円筒部と外輪円筒部との間に配置された複数の玉と、玉を保持する保持器と、外輪外径に嵌められた円筒部および円筒部に設けられて内輪フランジ部に摺接しているシールリップからなるフランジ間シールとを備えており、内輪フランジ部の内側面に、潤滑剤の外部への流出を抑える潤滑剤流出防止溝が設けられていることを特徴とする玉軸受。   An inner ring cylindrical portion having an inner ring raceway groove formed on the outer periphery and an inner ring made of a press having an inner ring flange portion extending from one end of the inner ring cylindrical portion in the outer diameter direction, and an outer ring raceway groove formed concentrically with the inner ring cylindrical portion and on the inner periphery A press outer ring having an outer ring cylindrical portion whose one end faces the inner ring flange portion from the inner side in the axial direction and an outer ring flange portion extending in the outer radial direction from the other end portion of the outer ring cylindrical portion, and an inner ring cylindrical portion and an outer ring cylinder A flange comprising a plurality of balls arranged between the outer ring, a cage for holding the balls, a cylindrical portion fitted to the outer diameter of the outer ring, and a seal lip provided on the cylindrical portion and in sliding contact with the inner ring flange portion A ball bearing characterized in that a lubricant outflow prevention groove is provided on the inner surface of the inner ring flange portion to prevent outflow of the lubricant to the outside. 潤滑剤流出防止溝は、環状とされている請求項１の玉軸受。   The ball bearing according to claim 1, wherein the lubricant outflow prevention groove is annular. 潤滑剤流出防止溝は、スパイラル状とされている請求項１の玉軸受。   The ball bearing according to claim 1, wherein the lubricant outflow prevention groove has a spiral shape. 内輪回転である請求項１から３までのいずれかの玉軸受。   4. The ball bearing according to claim 1, wherein the ball bearing is an inner ring rotation.
JP2004079980A 2004-03-19 2004-03-19 Ball bearing Withdrawn JP2005265083A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016118055A1 (en) * 2016-09-23 2018-03-29 Thyssenkrupp Ag Rolling bearing, wind turbine and method for operating a rolling bearing
CN107882870A (en) * 2017-11-29 2018-04-06 浙江大学 Bionical Spiral Groove Thrust Bearing

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102016118055A1 (en) * 2016-09-23 2018-03-29 Thyssenkrupp Ag Rolling bearing, wind turbine and method for operating a rolling bearing
DE102016118055B4 (en) * 2016-09-23 2020-10-15 Thyssenkrupp Ag Roller bearings and wind turbine
CN107882870A (en) * 2017-11-29 2018-04-06 浙江大学 Bionical Spiral Groove Thrust Bearing
CN107882870B (en) * 2017-11-29 2024-03-22 浙江大学 Bionic spiral groove thrust bearing

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