JP5351686B2 - Roller bearing - Google Patents

Roller bearing Download PDF

Info

Publication number
JP5351686B2
JP5351686B2 JP2009222498A JP2009222498A JP5351686B2 JP 5351686 B2 JP5351686 B2 JP 5351686B2 JP 2009222498 A JP2009222498 A JP 2009222498A JP 2009222498 A JP2009222498 A JP 2009222498A JP 5351686 B2 JP5351686 B2 JP 5351686B2
Authority
JP
Japan
Prior art keywords
column
roller
cage
lubricant
extension
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.)
Expired - Fee Related
Application number
JP2009222498A
Other languages
Japanese (ja)
Other versions
JP2011069460A (en
Inventor
直太 山本
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.)
NTN Corp
Original Assignee
NTN 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 NTN Corp filed Critical NTN Corp
Priority to JP2009222498A priority Critical patent/JP5351686B2/en
Publication of JP2011069460A publication Critical patent/JP2011069460A/en
Application granted granted Critical
Publication of JP5351686B2 publication Critical patent/JP5351686B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • F16C33/46—Cages for rollers or needles
    • F16C33/49—Cages for rollers or needles comb-shaped
    • F16C33/494—Massive or moulded comb cages
    • F16C33/495—Massive or moulded comb cages formed as one piece cages, i.e. monoblock comb cages
    • F16C33/498—Massive or moulded comb cages formed as one piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
    • 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
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F16C19/28—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with two or more rows of rollers

Landscapes

  • 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 roller bearing equipped with a comb-shaped cage for preventing the occurrence of improper lubrication on an outer peripheral face of a roller. <P>SOLUTION: A plurality of rollers 3 held in the cage 4 are provided between an inner ring 1 and an outer ring 2. The cage 4 has an annular part 5 and a plurality of column parts 6 protruding from a plurality of sections in the peripheral direction of the annular part 5 like comb-teeth to hold each roller 3 in a pocket 7 between adjacent column parts 6. Each of the column parts 6 of the cage 4 includes a column part extended part 6b extended from a tip of a column part body 6a being a part functioning to guide the roller in the column part 6 and holding lubricant. A cross sectional shape of an opposing face 6ba to the roller in the column part extended part 6b is such a cross sectional shape being more separated from an outer peripheral face 3a of the roller than an opposing face 6aa to the roller in the column part body 6a on the whole face. A lubricant holding recessed part 9 for holding lubricant is formed in a part close to a roller arranging pitch circle pcd in the radial direction of the column part extended part 6b. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

この発明は、工作機械用主軸等の高速スピンドルの支持に用いられるころ軸受に関する。   The present invention relates to a roller bearing used for supporting a high-speed spindle such as a spindle for a machine tool.

周知のように、マシニングセンタ、ＣＮＣ旋盤、フライス盤等の工作機械においては、主軸はハウジングに対して軸受で回転自在に支持されるのが通例であって、この主軸の向きは、機械形式によって、縦軸（軸線が鉛直方向に向いたもの）と横軸（軸線が水平方向に向いたもの）とに大別される。また、この主軸を支持する軸受の潤滑方式は、使用条件等に応じて、グリース潤滑やエアオイル潤滑等の油潤滑が採用されると共に、その軸受形式としては、組合せアンギュラ玉軸受や円筒ころ軸受が一般に広く使用されている。   As is well known, in a machine tool such as a machining center, a CNC lathe, a milling machine, etc., the main shaft is usually supported rotatably by a bearing with respect to the housing, and the orientation of the main shaft depends on the machine type. It is roughly divided into an axis (the axis is oriented in the vertical direction) and a horizontal axis (the axis is oriented in the horizontal direction). The lubrication system of the bearing that supports the main shaft employs oil lubrication such as grease lubrication or air-oil lubrication according to the usage conditions, and as a bearing type, a combination angular contact ball bearing or cylindrical roller bearing is used. Generally used widely.

この場合、工作機械の主軸の支持に用いられる円筒ころ軸受は、内輪と外輪との相互間に所定間隔おきに複数の円筒ころを保持しておくための保持器を備えているのが通例である。そして、この保持器としては、従来より高力黄銅鋳物のもみ抜き（削り出し）保持器が主に使用されてきたが、運転時の保持器の摩耗粉による潤滑剤劣化の問題や軽量化の点から、近年においては合成樹脂製保持器への切り換えが進むに至っている。   In this case, the cylindrical roller bearing used for supporting the main shaft of the machine tool is usually provided with a cage for holding a plurality of cylindrical rollers at predetermined intervals between the inner ring and the outer ring. is there. And, as this cage, a high-strength brass cast-out (machined) cage has been mainly used conventionally. However, there is a problem of lubricant deterioration due to wear powder of the cage during operation and weight reduction. From this point, in recent years, switching to a synthetic resin cage has progressed.

現在使用されている円筒ころ軸受の合成樹脂製保持器として、環状部およびこの環状部の周方向複数箇所から櫛歯状に突出した柱部を有し、隣合う柱部の間のポケットで円筒ころを保持する櫛形のものが公知となっている（例えば特許文献１，２，３）。   As a synthetic resin cage for cylindrical roller bearings currently in use, it has an annular part and pillar parts protruding in a comb-like shape from a plurality of locations in the circumferential direction of this annular part, and a cylinder in a pocket between adjacent pillar parts Comb-shaped ones that hold rollers are known (for example, Patent Documents 1, 2, and 3).

特開２００５−１４０２６９号公報JP 2005-140269 A 特開２００５−１６３９９７号公報Japanese Patent Laid-Open No. 2005-163997 特開２００４−１６２８１８号公報JP 2004-162818 A

この種の櫛形の保持器は、柱部の先端が自由端であるため、特に高速回転時において、柱部の先端が遠心力で外径側へ弾性変形することにより、変形した柱部の円周方向側面の先端側内周部が円筒ころの外周面と接触する可能性がある。これを避けるため、柱部はあまり長くしないのが良いとされ、一般的には、図７に示すように、保持器４の柱部６の長さＡは円筒ころ３の軸方向長さＬの７０％程度が好ましいとされている。   Since this type of comb-shaped cage has a free end at the end of the column, the tip of the column is elastically deformed to the outer diameter side by centrifugal force, especially during high-speed rotation. There is a possibility that the inner peripheral portion on the front end side of the circumferential side surface contacts the outer peripheral surface of the cylindrical roller. In order to avoid this, it is preferable that the column portion is not so long. Generally, as shown in FIG. 7, the length A of the column portion 6 of the cage 4 is the axial length L of the cylindrical roller 3. 70% of the total is preferred.

しかし、上記のように柱部６の長さＡを円筒ころ３の軸方向長さＢよりも短くすると、長時間運転した場合に、円筒ころ３の外周面３ａにおける柱部６と対向しない箇所（交差したハッチングで示す箇所）の潤滑剤保持力が低下し、潤滑不良による油焼けや摩耗が発生することが試験により明らかになった。   However, when the length A of the column portion 6 is shorter than the axial length B of the cylindrical roller 3 as described above, the portion that does not face the column portion 6 on the outer peripheral surface 3a of the cylindrical roller 3 when operated for a long time. Tests have revealed that the lubricant retention of the areas (shown by crossed hatching) is reduced, and oil burns and wear due to poor lubrication occur.

この発明の目的は、ころ外周面で潤滑不良が生じにくい櫛形の保持器を備えたころ軸受を提供することである。
この発明の他の目的は、ころ外周面で潤滑不良が生じにくい櫛形の保持器を提供することである。 An object of the present invention is to provide a roller bearing provided with a comb-shaped cage that hardly causes poor lubrication on the outer peripheral surface of the roller.
Another object of the present invention is to provide a comb-shaped cage in which poor lubrication hardly occurs on the outer peripheral surface of the roller.

この発明のころ軸受は、内輪と外輪との間に、保持器に保持された複数のころが介在し、前記保持器が、環状部およびこの環状部の周方向複数箇所から櫛歯状に突出した複数の柱部を有し、隣合う柱部の間が、ころを保持するポケットとなる櫛形の保持器である。前記保持器の前記各柱部に、この柱部のころ案内機能を果たす部分である柱部本体の先端から延長して、潤滑剤を保持する機能を奏する柱部延長部を設け、前記保持器の前記柱部延長部におけるころ対向面の断面形状が、全面において、前記柱部本体におけるころ対向面よりもころ外周面から離れる断面形状であり、かつ前記柱部延長部のころ配列ピッチ円付近となる径方向部分に、潤滑剤を保持する潤滑剤保持凹部を設けたことを特徴とする。   In the roller bearing according to the present invention, a plurality of rollers held by a cage are interposed between an inner ring and an outer ring, and the cage protrudes in a comb shape from an annular portion and a plurality of circumferential portions of the annular portion. A comb-shaped cage that has a plurality of column portions and between the adjacent column portions becomes a pocket for holding rollers. Each of the column portions of the retainer is provided with a column portion extension that extends from the end of a column main body that is a portion that performs a roller guiding function of the column portion, and has a function of retaining a lubricant. The cross-sectional shape of the roller facing surface in the column portion extension portion is a cross-sectional shape that is farther from the roller outer peripheral surface than the roller facing surface in the column body in the entire surface, and near the roller arrangement pitch circle of the column portion extension portion. A lubricant retaining recess for retaining the lubricant is provided in the radial direction portion.

この構成によると、保持器の柱部に、この柱部のころ案内機能を果たす部分である柱部本体の先端から延長して、潤滑剤を保持する機能を奏する柱部延長部が設けられているため、ころ外周面における柱部によって案内される領域よりも先端側の領域でも潤滑剤を保持できる。しかも、柱部延長部のころ配列ピッチ円付近となる径方向部分に、潤滑剤を保持する潤滑剤保持凹部が設けられているため、潤滑剤の保持力がより一層高まり、潤滑性が極めて良好である。保持器の柱部延長部におけるころ対向面の断面形状が、全面において、柱部本体におけるころ対向面よりもころ外周面から離れる断面形状であるため、高速回転時に柱部の先端が遠心力で外径側へ弾性変形した場合でも、変形した柱部延長部がころ外周面と接触しない。   According to this configuration, the column portion of the cage is provided with a column portion extension portion that extends from the tip of the column portion main body, which is a portion that performs the roller guiding function of the column portion, and that functions to hold the lubricant. Therefore, the lubricant can be retained in the region on the tip side of the region guided by the column portion on the roller outer peripheral surface. In addition, since the lubricant retaining recess for retaining the lubricant is provided in the radial direction portion near the roller arrangement pitch circle of the column extending portion, the retaining force of the lubricant is further increased, and the lubricity is extremely good. It is. Since the cross-sectional shape of the roller facing surface in the column extension portion of the cage is a cross-sectional shape that is farther from the roller outer peripheral surface than the roller facing surface in the column main body, the tip of the column portion is subjected to centrifugal force during high-speed rotation. Even when elastically deforming to the outer diameter side, the deformed column extension does not contact the roller outer peripheral surface.

前記保持器の前記柱部本体の長さはころ長さよりも短く、かつ前記柱部延長部の先端がころ端面よりも突出している。
柱部本体の長さをころ長さよりも短くすることで、高速回転時に柱部本体が遠心力で外径側へ弾性変形した場合でも、柱部本体の先端の変形量を少なくして、変形した柱部本体がころ外周面と接触するのを防ぐことができる。また、柱部延長部の先端をころ端面よりも突出させることにより、確実にころ外周面の全域にわたって潤滑剤を保持させることができる。 The length of the pillar portion body before Symbol retainer is shorter than the roller length, and the tip of the pillar portion extending portions that protrude from the end face rollers.
By making the length of the column main body shorter than the roller length, even when the column main body elastically deforms to the outer diameter side due to centrifugal force during high-speed rotation, the amount of deformation at the tip of the column main body is reduced and deformed. It is possible to prevent the column main body from contacting the roller outer peripheral surface. Further, by making the tip of the column extension part protrude from the roller end face, the lubricant can be reliably held over the entire area of the roller outer peripheral face.

前記保持器の前記柱部における前記潤滑剤保持凹部は、前記柱部延長部の全長にわたって設ける。
潤滑剤保持凹部を柱部延長部の全長にわたって設ければ、柱部延長部の全長にわたって潤滑剤の保持力を高くできる。 The lubricant holding recess in the pillar portion of the front Symbol retainer Ru provided over the entire length of said pillar portion extension.
If the lubricant retaining recess is provided over the entire length of the column extension, the holding force of the lubricant can be increased over the entire length of the column extension.

前記保持器の前記柱部延長部における前記ころ対向面の径方向の外径端に、ポケット内側に突出する鍔状部を設け、この鍔状部の先端位置を、前記柱部本体のころ対向面よりも微小寸法だけころ外周面から離れる位置とする。その場合、前記保持器の前記柱部延長部のころ対向面の断面形状を、前記鍔状部を除く全体が前記潤滑剤保持凹部となる形状とするのが望ましい。
保持器の柱部延長部におけるころ対向面の径方向の外径端に設けた鍔状部により、回転時の遠心力による潤滑剤保持凹部から潤滑剤の漏れを防ぐことができる。鍔状部を除く柱部延長部のころ対向面の全体が潤滑剤保持凹部であれば、潤滑剤保持凹部により十分な量の潤滑剤を確保することができる。 Before SL retainer of said radial direction of said roller facing surface of the pillar portion extended portion radially outer end, a flange portion protruding inward pockets provided, the position of the tip of the flange portion, the time of the pillar portion body The position is separated from the outer peripheral surface of the roller by a minute dimension from the opposing surface . In this case, it is desirable that the cross-sectional shape of the roller facing surface of the column portion extension portion of the cage is a shape in which the entire portion excluding the hook-like portion becomes the lubricant holding concave portion.
The hook-shaped portion provided at the radially outer diameter end of the roller facing surface in the column portion extension portion of the cage can prevent the lubricant from leaking from the lubricant holding concave portion due to the centrifugal force during rotation. If the entire roller facing surface of the column extension portion excluding the bowl-shaped portion is the lubricant retaining recess, a sufficient amount of lubricant can be secured by the lubricant retaining recess.

この発明において、前記保持器の前記柱部延長部の保持器径方向の厚さを、内径側面および外径側面が共に前記柱部本体と同じ径方向位置となる厚さとしてもよく、あるいは、前記保持器の前記柱部延長部の保持器径方向の厚さを、内径側端が前記柱部本体よりも大径で、かつ外径側端が前記柱部本体と同じ径方向位置となる厚さとしてもよい。
前者の場合、潤滑剤保持凹部の潤滑剤保持力が大ききという利点があり、後者の場合、保持器重量を小さくして遠心力による柱部の変形量を抑えられるという利点がある。ころ軸受のサイズ、用途等の条件に応じて選択すればよい。 In this invention, the thickness in the cage radial direction of the column extension portion of the cage may be a thickness in which both the inner diameter side surface and the outer diameter side surface are in the same radial position as the column body, or The thickness of the cage extension of the cage in the radial direction of the cage is such that the inner diameter side end is larger in diameter than the column body and the outer diameter side end is at the same radial position as the column body. It may be a thickness.
In the former case, there is an advantage that the lubricant holding force of the lubricant holding recess is large, and in the latter case, there is an advantage that the weight of the cage can be reduced and the deformation amount of the column portion due to centrifugal force can be suppressed. What is necessary is just to select according to conditions, such as a size of a roller bearing and a use.

この発明において、前記保持器の前記柱部延長部における前記ころ対向面の径方向の内径端に、ポケット内側へ突出する鍔状部を設け、この鍔状部の先端位置を、前記柱部本体のころ対向面よりも微小寸法だけ外周面から離れる位置としてもよい。その場合、前記保持器の柱部延長部における、両側のころ対向面の前記潤滑剤保持凹部間を貫通する貫通孔を設けるとよい。
保持器の柱部延長部におけるころ対向面の径方向の外径端に設けた鍔状部により、回転時の遠心力による潤滑剤保持凹部からの潤滑剤の漏れを防ぐことができることに加えて、内径端に設けた鍔状部により、停止時に潤滑剤保持凹部から潤滑剤が漏れるのを防ぐことができる。両側のころ対向面の潤滑剤保持凹部間を貫通する貫通孔を設ければ、潤滑剤の保持量を多くすることができると共に、各ポケット間で潤滑剤が移動可能となることで、ころ外周面への潤滑油の供給が良好に行われ、潤滑寿命を延長させられる。 In the present invention, the said column portion radially inner diameter end of the roller opposing surface in the extension portion of the retainer, the flange portion which projects inside pocket is provided, the position of the tip of the flange portion, the pillar portion It is good also as a position which leaves | separates from a peripheral surface only a minute dimension rather than the roller opposing surface of a main body. In that case, it is good to provide the through-hole which penetrates between the said lubricant holding recessed parts of the roller opposing surface of both sides in the pillar part extension part of the said holder | retainer.
In addition to preventing the leakage of the lubricant from the lubricant holding recess due to the centrifugal force during rotation by the flange-shaped portion provided at the radially outer diameter end of the roller facing surface in the column extension portion of the cage The hook-shaped portion provided at the inner diameter end can prevent the lubricant from leaking from the lubricant holding recess when stopped. Providing through-holes that penetrate between the lubricant retaining recesses on the roller facing surfaces on both sides increases the amount of lubricant retained and allows the lubricant to move between the pockets. Lubricating oil can be supplied to the surface well, and the lubrication life can be extended.

この発明において、ころ軸受は複列の円筒ころ軸受とすることができる。その場合、各列の円筒ころをそれぞれ保持する各列の保持器は互いに前記環状部の側で対向し、これら各列の保持器の間隔が０．４ないし０．６ｍｍであるのが望ましいことが、試験により明らかとなった。   In this invention, the roller bearing can be a double row cylindrical roller bearing. In that case, it is desirable that the cages in each row holding the cylindrical rollers in each row face each other on the side of the annular portion, and the distance between the cages in each row is 0.4 to 0.6 mm. However, it became clear by the test.

ころ軸受用保持器は、ころ軸受に用いられ、環状部およびこの環状部の周方向複数箇所から櫛歯状に突出した複数の柱部を有し、隣合う柱部の間が、ころを保持するポケットとなる櫛状の保持器である。前記保持器の前記各柱部に、この柱部のころ案内機能を果たす部分である柱部本体の先端から延長しで、潤滑油を保持する機能を奏する部分である柱部延長部を設け、前記保持器の前記柱部延長部におけるころ対向面の断面形状が、全面において、前記柱部本体におけるころ対向面よりもころ外周面から離れる断面形状であり、かつ前記柱部延長部のころ配列ピッチ円付近となる径方向部分に、潤滑剤を保持する潤滑剤保持凹部を設けたことを特徴とする。 This Ro bearing cage is used in a roller bearing has an annular portion and a plurality of pillar portions which protrude in a comb shape from a plurality of circumferential locations of the annular portion, between the adjacent pillar portions, the rollers It is a comb-like cage that serves as a pocket to hold. Each column portion of the retainer is provided with a column portion extension portion that is a portion that functions to retain lubricating oil by extending from the tip of the column portion main body that is a portion that performs the roller guiding function of the column portion, The cross-sectional shape of the roller facing surface in the column portion extension of the cage is a cross-sectional shape that is farther from the roller outer peripheral surface than the roller facing surface in the column main body, and the roller arrangement of the column portion extension portion. A lubricant holding recess for holding the lubricant is provided in a radial direction portion near the pitch circle.

この構成によると、保持器の柱部に、この柱部のころ案内機能を果たす部分である柱部本体の先端から延長して、潤滑剤を保持する機能を奏する柱部延長部が設けられているため、ころ外周面における柱部の先端側の領域でも潤滑剤を保持できる。しかも、柱部延長部のころ配列ピッチ円付近となる径方向部分に、潤滑剤を保持する潤滑剤保持凹部を設けられているため、潤滑剤の保持力がより一層高まり、潤滑性が極めて良好である。保持器の柱部延長部におけるころ対向面の断面形状が、全面において、柱部本体におけるころ対向面よりもころ外周面から離れる断面形状であるため、高速回転時に柱部の先端が遠心力で外径側へ弾性変形した場合でも、変形した柱部延長部がころ外周面と接触しない。   According to this configuration, the column portion of the cage is provided with a column portion extension portion that extends from the tip of the column portion main body, which is a portion that performs the roller guiding function of the column portion, and that functions to hold the lubricant. Therefore, the lubricant can be held even in the region on the tip end side of the column portion on the roller outer peripheral surface. In addition, since the lubricant retaining recess for retaining the lubricant is provided in the radial direction portion in the vicinity of the roller arrangement pitch circle of the column extension portion, the retaining force of the lubricant is further increased and the lubricity is extremely good. It is. Since the cross-sectional shape of the roller facing surface in the column extension portion of the cage is a cross-sectional shape that is farther from the roller outer peripheral surface than the roller facing surface in the column main body, the tip of the column portion is subjected to centrifugal force during high-speed rotation. Even when elastically deforming to the outer diameter side, the deformed column extension does not contact the roller outer peripheral surface.

この発明のころ軸受は、内輪と外輪との間に、保持器に保持された複数のころが介在し、前記保持器が、環状部およびこの環状部の周方向複数箇所から櫛歯状に突出した複数の柱部を有し、隣合う柱部の間が、ころを保持するポケットとなる櫛形の保持器であるころ軸受において、前記保持器の前記各柱部に、この柱部のころ案内機能を果たす部分である柱部本体の先端から延長して、潤滑剤を保持する機能を奏する柱部延長部を設け、前記保持器の前記柱部延長部におけるころ対向面の断面形状が、全面において、前記柱部本体におけるころ対向面よりもころ外周面から離れる断面形状であり、かつ前記柱部延長部のころ配列ピッチ円付近となる径方向部分に、潤滑剤を保持する潤滑剤保持凹部を設け、前記保持器の前記柱部本体の長さがころ長さよりも短く、かつ前記柱部延長部の先端がころ端面よりも突出し、前記保持器の前記柱部における前記潤滑剤保持凹部を、前記柱部延長部の全長にわたって設け、前記保持器の前記柱部延長部における前記ころ対向面の径方向の外径端に、ポケット内側に突出する鍔状部を設け、この鍔状部の先端位置を、前記柱部本体のころ対向面よりも微小寸法だけころ外周面から離れる位置としたため、ころ外周面で潤滑不良が生じにくい。 In the roller bearing according to the present invention, a plurality of rollers held by a cage are interposed between an inner ring and an outer ring, and the cage protrudes in a comb shape from an annular portion and a plurality of circumferential portions of the annular portion. In a roller bearing which is a comb-shaped cage that has a plurality of column portions and a space between adjacent column portions is a pocket for holding a roller, the roller guide of the column portion is provided to each column portion of the cage. Extending from the tip of the column main body, which is the part that fulfills the function, provided with a column extension that functions to hold the lubricant, the cross-sectional shape of the roller facing surface of the column extension of the cage is the entire surface In the above, the lubricant retaining recess for retaining the lubricant in the radial direction portion of the pillar body, which has a cross-sectional shape that is farther from the roller outer peripheral surface than the roller facing surface, and is near the roller arrangement pitch circle of the pillar portion extension. the setting only, the length of the pillar body of the retainer Shorter than the filter length, and the tip of the column extension extends beyond the end face of the roller, and the lubricant holding recess in the column of the cage is provided over the entire length of the column extension. A flange-like portion that protrudes inside the pocket is provided at the radially outer diameter end of the roller-facing surface in the column portion extension portion, and the tip position of the bowl-shaped portion is smaller than that of the roller-facing surface of the column body. Since the position is away from the outer peripheral surface of the roller by the dimension , poor lubrication hardly occurs on the outer peripheral surface of the roller.

（Ａ）はこの発明の実施形態にかかるころ軸受の断面図、（Ｂ）はそのＩＡ−ＩＡ断面のころおよび保持器を示す図である。(A) is sectional drawing of the roller bearing concerning embodiment of this invention, (B) is a figure which shows the roller and holder | retainer of the IA-IA cross section. 同ころ軸受の異なる状態を示す断面図である。It is sectional drawing which shows the different state of the roller bearing. （Ａ）はこの発明の異なる実施形態にかかるころ軸受の断面図、（Ｂ）はそのIIIＢ−IIIＢ断面のころおよび保持器を示す図である。(A) is sectional drawing of the roller bearing concerning different embodiment of this invention, (B) is a figure which shows the roller and holder | retainer of the IIIB-IIIB cross section. （Ａ）はこの発明のさらに異なる実施形態にかかるころ軸受の断面図、（Ｂ）はそのVIＢ−VIＢ断面のころおよび保持器を示す図である。(A) is sectional drawing of the roller bearing concerning another embodiment of this invention, (B) is a figure which shows the roller and holder | retainer of the VIB-VIB cross section. （Ａ）はこの発明のさらに異なる実施形態にかかるころ軸受の断面図、（Ｂ）はそのＶＢ−ＶＢ断面のころおよび保持器を示す図である。(A) is sectional drawing of the roller bearing concerning further different embodiment of this invention, (B) is a figure which shows the roller and holder | retainer of the VB-VB cross section. （Ａ）はこの発明のさらに異なる実施形態にかかるころ軸受の断面図、（Ｂ）はそのVIＢ−VIＢ断面のころおよび保持器を示す図である。(A) is sectional drawing of the roller bearing concerning another embodiment of this invention, (B) is a figure which shows the roller and holder | retainer of the VIB-VIB cross section. （Ａ）は従来のころ軸受の断面図、（Ｂ）はそのVIIＢ−VIIＢ断面のころおよび保持器を示す図である。(A) is sectional drawing of the conventional roller bearing, (B) is a figure which shows the roller and holder | retainer of the VIIB-VIIB cross section.

この発明の第１の実施形態を図１および図２と共に説明する。このころ軸受は、複列円筒ころ軸受であり、複列の軌道面１ａを有する内輪１と、複列の軌道面２ａを有する外輪２と、これら内外輪１，２の軌道面１ａ，２ａ間に介在させた各列複数の円筒ころ３と、各列の円筒ころ３をそれぞれ保持する一対の保持器４とを備える。内輪１は、複列の軌道面１ａ間に中鍔１ｂおよび各軌道面１ａの軸方向外側に外鍔１ｃをそれぞれ有する鍔付き内輪であり、図示しない主軸の外径面に嵌合する。外輪２は鍔無しであり、図示しない軸受箱内に固定される。ころ軸受は、内部空間に油やグリース等の潤滑剤を封入して使用される。   A first embodiment of the present invention will be described with reference to FIGS. This roller bearing is a double-row cylindrical roller bearing, and includes an inner ring 1 having a double-row raceway surface 1a, an outer ring 2 having a double-row raceway surface 2a, and the raceway surfaces 1a and 2a of the inner and outer rings 1 and 2a. A plurality of cylindrical rollers 3 interposed in each row, and a pair of cages 4 that respectively hold the cylindrical rollers 3 in each row. The inner ring 1 is a hooked inner ring having a center rod 1b between the double-row raceway surfaces 1a and an outer rod 1c on the outer side in the axial direction of each raceway surface 1a, and is fitted to an outer diameter surface of a main shaft (not shown). The outer ring 2 has no wrinkles and is fixed in a bearing box (not shown). A roller bearing is used by enclosing a lubricant such as oil or grease in an internal space.

保持器４は、例えば、ポリエーテルエーテルケトン樹脂（ＰＥＥＫ）、ポリアミド樹脂（ＰＡ：ＰＡ６６：ＰＡ４６）、ポリフェニレンサルファイド樹脂（ＰＰＳ）等の自己潤滑性を有する合成樹脂（必要に応じてカーボンファイバ（ＣＦ）、グラスファイバ（ＧＦ）等の充填材を所要量配合する。）を射出成形して形成される。   The cage 4 is made of, for example, a synthetic resin having a self-lubricating property such as polyether ether ketone resin (PEEK), polyamide resin (PA: PA66: PA46), polyphenylene sulfide resin (PPS) (carbon fiber (CF if necessary) ), A required amount of a filler such as glass fiber (GF) is blended).

保持器４は、環状部５およびこの環状部５の周方向複数箇所から櫛歯状に突出した複数の柱部６を有し、隣合う柱部６の間が、円筒ころ３を保持するポケット７となる櫛形をしている。柱部６は、円筒ころ３の案内機能を果たす部分である柱部本体６ａと、この柱部本体６ａの先端から延長して、潤滑剤を保持する機能を奏する柱部延長部６ｂとでなる。柱部本体６ａの断面形状は、両側面が、円筒ころ３の外周面３ａに沿う断面円弧状に形成されている。柱部延長部６ｂの断面形状については、後で説明する。   The cage 4 has an annular portion 5 and a plurality of column portions 6 protruding in a comb shape from a plurality of locations in the circumferential direction of the annular portion 5, and a pocket between the adjacent column portions 6 holds the cylindrical roller 3. It has a comb shape of 7. The column portion 6 includes a column portion main body 6a that is a portion that performs the guiding function of the cylindrical roller 3, and a column portion extension portion 6b that extends from the tip of the column portion main body 6a and has a function of holding a lubricant. . As for the cross-sectional shape of the column part main body 6a, both side surfaces are formed in the cross-section circular arc shape along the outer peripheral surface 3a of the cylindrical roller 3. FIG. The cross-sectional shape of the column portion extension 6b will be described later.

柱部本体６ａの軸方向長さＡは、円筒ころ３の軸方向長さＬよりも短い。例えば、ＡはＬの６０〜８０％とするのが良く、７０％程度が最も好ましい。また、柱部本体６ａと柱部延長部６ｂを合わせた柱部６全体の軸方向長さ（Ａ＋Ｂ）は、円筒ころ３の軸方向長さＬよりも長い。よって、柱部延長部６ｂの先端は、円筒ころ３の端面よりも突出している（突出量Ｃ）。なお、図１（Ａ）は、各列の保持器４が互いに接触した状態を示すが、図２に示すように、柱部本体６ａの基端と円筒ころ３の軸受中心側の端面とが同一軸方向位置にある状態では、各列の保持器４間に隙間（隙間寸法Ｄ）が生じる。各保持器４は隙間寸法Ｄの範囲内で軸方向に移動可能である。この隙間寸法Ｄは、軸受サイズによって異なるが、０．４〜０．６ｍｍ程度が望ましいことが試験によって分かった。隙間寸法Ｄ＝０である場合でも、前記突出量Ｃ≧０となるように柱部延長部６ｂの寸法が定められている。   The axial length A of the columnar body 6 a is shorter than the axial length L of the cylindrical roller 3. For example, A is preferably 60 to 80% of L, and most preferably about 70%. Further, the axial length (A + B) of the entire column portion 6 including the column portion main body 6 a and the column portion extension portion 6 b is longer than the axial length L of the cylindrical roller 3. Therefore, the tip of the column portion extension 6b protrudes beyond the end surface of the cylindrical roller 3 (projection amount C). 1A shows a state in which the cages 4 in each row are in contact with each other. As shown in FIG. 2, the base end of the column body 6a and the end surface on the bearing center side of the cylindrical roller 3 are connected to each other. In the state in the same axial position, a gap (gap size D) is generated between the cages 4 in each row. Each cage 4 is movable in the axial direction within a gap D. Although this gap dimension D differs depending on the bearing size, it has been found through tests that about 0.4 to 0.6 mm is desirable. Even when the gap dimension D = 0, the dimension of the column portion extension portion 6b is determined so that the protrusion amount C ≧ 0.

柱部延長部６ｂにおけるころ対向面６ｂａの断面形状は、全面において、柱部本体６ａにおけるころ対向面６ａａよりもころ外周面３ａから離れる断面形状である。言い換えると、柱部延長部６ｂは、ポケット内面となる側面の全体を、円筒ころ３に対して非接触となるように、柱部本体６ａのポケット内面よりも柱部６の柱幅中心側へ凹ました形状をしている。詳しくは、柱部延長部６ｂにおけるころ対向面６ｂａの径方向外径端に、ポケット７の内側へ突出する鍔状部８が設けられている。この鍔状部８の先端位置は、柱部本体６ａのころ対向面６ａａよりも微小寸法δだけころ外径面３ａから離れた位置とされている。つまり、鍔状部８の箇所で、ポケット７の周方向幅を狭くしてある。鍔状部８の先端面は、円筒ころ３の外周面３ａに沿う断面円弧状、またはテーパ面とされている。   The cross-sectional shape of the roller facing surface 6ba in the columnar extension 6b is a cross-sectional shape that is farther from the roller outer peripheral surface 3a than the roller facing surface 6aa in the columnar body 6a. In other words, the column portion extension portion 6b is closer to the column width center side of the column portion 6 than the pocket inner surface of the column portion main body 6a so that the entire side surface serving as the pocket inner surface is not in contact with the cylindrical roller 3. It has a concave shape. Specifically, a flange-shaped portion 8 that protrudes inward of the pocket 7 is provided at the radially outer end of the roller facing surface 6ba in the column portion extension 6b. The tip position of the flange-shaped portion 8 is a position farther from the roller outer diameter surface 3a by a minute dimension δ than the roller facing surface 6aa of the columnar body 6a. That is, the circumferential width of the pocket 7 is narrowed at the portion of the hook-shaped portion 8. The front end surface of the bowl-shaped portion 8 has a circular arc shape or a tapered surface along the outer peripheral surface 3 a of the cylindrical roller 3.

柱部延長部６ｂにおけるころ対向面６ｂａの鍔状部８を除く全体は、潤滑剤を保持する潤滑剤保持凹部９になっている。この潤滑剤保持凹部９は、柱部延長部６ｂのころ配列ピッチ円ｐｃｄ付近となる径方向部分を含んでいる。また、潤滑剤保持凹部９は、柱部延長部６ｂの全長にわたって設けられている。柱部延長部６ｂにおけるころ対向面６ｂａの鍔状部８を除く部分の断面形状は、保持器円周方向の幅が一定の矩形状とされている。   The entirety of the column extension portion 6b excluding the flange-shaped portion 8 of the roller facing surface 6ba is a lubricant holding recess 9 for holding the lubricant. The lubricant retaining recess 9 includes a radial direction portion in the vicinity of the roller arrangement pitch circle pcd of the column extending portion 6b. Further, the lubricant retaining recess 9 is provided over the entire length of the column extension portion 6b. The cross-sectional shape of the portion excluding the flange portion 8 of the roller facing surface 6ba in the column portion extension portion 6b is a rectangular shape having a constant width in the cage circumferential direction.

柱部延長部６ｂの保持器径方向の厚さは、内径側面および外径側面が共に柱部本体６ａと同じ径方向位置となる厚さである。つまり、柱部延長部６ｂの外径側面および内径側面が、柱部６全体の外径側面および内径側面からそのまま延びている。   The thickness in the cage radial direction of the column portion extension 6b is such that both the inner diameter side surface and the outer diameter side surface are at the same radial position as the column main body 6a. That is, the outer diameter side surface and the inner diameter side surface of the column portion extension portion 6 b extend as they are from the outer diameter side surface and the inner diameter side surface of the entire column portion 6.

この構成によると、保持器４の柱部６に、この柱部６のころ案内機能を果たす部分である柱部本体６ａの先端から延長して、潤滑剤を保持する機能を奏する柱部延長部６ｂが設けられ、この柱部延長部６ｂの先端を円筒ころ３の端面よりも突出させてあるため、ころ外周面３ａの全域にわたって潤滑剤を保持できる。しかも、柱部延長部６ｂのころ配列ピッチ円ｐｃｄ付近となる径方向部分から内径側にかけて、潤滑剤を保持する潤滑剤保持凹部９が柱部延長部６ｂの全長にわたって設けられているため、潤滑剤の保持力がより一層高まり、潤滑性が極めて良好である。   According to this structure, the pillar part 6 of the retainer 4 is extended from the tip of the pillar part body 6a, which is a part that performs the roller guiding function of the pillar part 6, and has a function of retaining the lubricant. 6b is provided, and the tip of the column portion extension 6b protrudes beyond the end surface of the cylindrical roller 3, so that the lubricant can be held over the entire region of the roller outer peripheral surface 3a. In addition, since the lubricant retaining recess 9 for retaining the lubricant is provided over the entire length of the column portion extension portion 6b from the radial portion of the column portion extension portion 6b near the roller arrangement pitch circle pcd to the inner diameter side, lubrication is performed. The holding power of the agent is further increased, and the lubricity is extremely good.

保持器４の柱部延長部６ｂにおけるころ対向面６ｂａの径方向の外径端に鍔状部８が設けられているため、回転時の遠心力による潤滑剤保持凹部９から潤滑剤の漏れを防ぐことができる。また、鍔状部８を除く柱部延長部６ｂのころ対向面６ｂａの全体が潤滑剤保持凹部９であるため、潤滑剤保持凹部９により十分な量の潤滑剤を確保することができる。   Since the flange portion 8 is provided at the outer diameter end of the roller facing surface 6ba in the radial direction of the column portion extension portion 6b of the retainer 4, leakage of the lubricant from the lubricant holding recess portion 9 due to centrifugal force during rotation is provided. Can be prevented. Further, since the entire roller facing surface 6ba of the column extension portion 6b excluding the bowl-shaped portion 8 is the lubricant holding recess 9, a sufficient amount of lubricant can be secured by the lubricant holding recess 9.

保持器４の柱部本体６ａの軸方向長さＡが円筒ころ３の軸方向長さＬよりも短いため、高速回転時に柱部本体６ａが遠心力で外径側へ弾性変形した場合でも、柱部本体６ａの先端の変形量が少なく、変形した柱部本体６ａが円筒ころ３の外周面３ａと接触しない。また、柱部本体６ａから先の延びる柱部延長部６ｂは、そのころ対向面６ｂａの断面形状が、全面において、柱部本体６ａにおけるころ対向面６ａａよりもころ外周面３ａから離れる断面形状であるため、高速回転時に柱部延長部６ｂの先端が遠心力で外径側へ弾性変形した場合でも、変形した柱部延長部６ｂが円筒ころ３と接触しない。   Since the axial length A of the column main body 6a of the cage 4 is shorter than the axial length L of the cylindrical roller 3, even when the column main body 6a is elastically deformed to the outer diameter side by centrifugal force during high-speed rotation, The amount of deformation at the tip of the column main body 6a is small, and the deformed column main body 6a does not contact the outer peripheral surface 3a of the cylindrical roller 3. Further, the column extending portion 6b extending from the column main body 6a has a cross-sectional shape of the roller facing surface 6ba that is separated from the roller outer peripheral surface 3a more than the roller facing surface 6aa in the column main body 6a. Therefore, even when the tip of the column extension 6b is elastically deformed to the outer diameter side by centrifugal force during high-speed rotation, the deformed column extension 6b does not contact the cylindrical roller 3.

図３はこの発明の異なる実施形態を示す。このころ軸受は、保持器４の柱部延長部６ｂの保持器径方向の厚さを、内径側端が柱部本体６ａよりも大径で、かつ外径側端が柱部本体６ａと同じ径方向位置となる厚さとしている。すなわち、柱部延長部６ｂの保持器径方向の厚さが、柱部本体６ａの保持器径方向の厚さよりも、寸法Ｅだけ薄くなっている。柱部延長部６ａの内径側端の両側の周縁共に、断面円弧状の面取り形状とされている。この構成とすることにより、保持器４の重量を小さくして遠心力による柱部６の変形量を抑えることができる。その他の構成、効果は、図１および図２に示す第１の実施形態と同様である。   FIG. 3 shows a different embodiment of the invention. In this roller bearing, the thickness in the cage radial direction of the column part extension 6b of the cage 4 is such that the inner diameter side end is larger in diameter than the column part body 6a and the outer diameter side end is the same as the column part body 6a. The thickness is a radial position. That is, the thickness in the cage radial direction of the column portion extension 6b is thinner by the dimension E than the thickness in the cage radial direction of the column body 6a. Both peripheral edges on the inner diameter side end of the column extension portion 6a are chamfered in a circular arc shape in cross section. By setting it as this structure, the weight of the holder | retainer 4 can be made small and the deformation amount of the column part 6 by centrifugal force can be suppressed. Other configurations and effects are the same as those of the first embodiment shown in FIGS.

図４はさらに異なる実施形態を示す。このころ軸受は、保持器４の柱部延長部６ｂにおけるころ対向面６ｂａの径方向の外径端および内径端に、ポケット内側へ突出する鍔状部８，１０が設けられている。これら鍔状部８，１０の先端位置は、柱部本体６ａのころ対向面６ａａよりもそれぞれ微小寸法δ１，δ２だけ外周面から離れる位置とされている。δ１，δ２の値は、同じであっても異なっていてもよい。この構成であると、前記同様、外径端に設けた鍔状部８により、回転時の遠心力による潤滑剤保持凹部９から外径側へ潤滑剤が漏れるのを防ぐことができることに加えて、内径端に設けた鍔状部１０により、停止時に潤滑剤保持凹部９から内径側へ潤滑剤が漏れるのを防ぐことができる。その他の構成、効果は、図１および図２に示す第１の実施形態と同様である。   FIG. 4 shows a further different embodiment. This roller bearing is provided with hook-shaped portions 8 and 10 protruding inward of the pockets at the radially outer and inner diameter ends of the roller facing surface 6ba of the column portion extension 6b of the cage 4. The tip positions of the flanges 8 and 10 are positions away from the outer peripheral surface by minute dimensions δ1 and δ2 from the roller facing surface 6aa of the column body 6a. The values of δ1 and δ2 may be the same or different. In this configuration, in the same manner as described above, the hook-like portion 8 provided at the outer diameter end can prevent the lubricant from leaking from the lubricant holding recess 9 to the outer diameter side due to the centrifugal force during rotation. The hook-shaped portion 10 provided at the inner diameter end can prevent the lubricant from leaking from the lubricant holding recess 9 to the inner diameter side when stopped. Other configurations and effects are the same as those of the first embodiment shown in FIGS.

図５はさらに異なる実施形態を示す。このころ軸受は、図４のころ軸受に対し、保持器４の柱部延長部６ｂにおける、両側のころ対向面６ｂａの潤滑剤保持凹部９間を貫通する貫通孔１１を設けたものである。この実施形態では、貫通孔１１は軸方向に長い長孔形状であり、柱部延長部６ｂの基端から円筒ころ３の端面よりも軸受外側の箇所にかけて設けられている。貫通孔９の両側の開口周縁は、断面円弧状の面取形状とされている。このような貫通孔１１を設ければ、貫通孔１１の分だけ潤滑剤を多く保持することができると共に、貫通孔１１を介して各ポケット７間で潤滑剤が移動可能となるため、円筒ころ３の外周面３ａへの潤滑油の供給が良好に行われ、潤滑寿命を延長させられる。その他の構成、効果は、図１および図２に示す第１の実施形態と同様である。   FIG. 5 shows a further different embodiment. The roller bearing shown in FIG. 4 is provided with through-holes 11 penetrating between the lubricant holding recesses 9 of the roller facing surfaces 6ba on both sides of the column extension portion 6b of the cage 4 with respect to the roller bearing of FIG. In this embodiment, the through-hole 11 has a long hole shape that is long in the axial direction, and is provided from the base end of the column portion extension 6 b to a location outside the bearing from the end face of the cylindrical roller 3. The peripheral edges of the openings on both sides of the through-hole 9 are chamfered with an arc cross section. If such a through hole 11 is provided, a larger amount of lubricant can be retained by the amount of the through hole 11 and the lubricant can be moved between the pockets 7 via the through hole 11. Thus, the lubricating oil can be satisfactorily supplied to the outer peripheral surface 3a of the steel 3, and the lubricating life can be extended. Other configurations and effects are the same as those of the first embodiment shown in FIGS.

図６に示すころ軸受のように、柱部延長部６ｂのさらに先端側に、柱部本体６ａと同じ断面形状をした柱部先端部６ｃを設けてもよい。柱部先端部６ｃは、円筒ころ３の端面よりも常時突出しているため、柱部本体６ａと同じ断面形状であっても、遠心力で弾性変形した場合に円筒ころ３に接触することがない。その他の構成、効果は、図１および図２に示す第１の実施形態と同様である。   As in the roller bearing shown in FIG. 6, a column tip end portion 6c having the same cross-sectional shape as the column portion main body 6a may be provided on the further tip side of the column extension portion 6b. Since the columnar tip 6c always protrudes from the end surface of the cylindrical roller 3, even if it has the same cross-sectional shape as the columnar body 6a, it does not contact the cylindrical roller 3 when it is elastically deformed by centrifugal force. . Other configurations and effects are the same as those of the first embodiment shown in FIGS.

この発明は、複列の円筒ころ軸受に限らす、他の形式のころ軸受にも、また単列のころ軸受にも適用できる。   The present invention is applicable not only to double-row cylindrical roller bearings, but also to other types of roller bearings and single-row roller bearings.

１…内輪
２…外輪
３…円筒ころ
３ａ…ころ外周面
４…保持器
５…環状部
６…柱部
６ａ…柱部本体
６ａａ…柱部本体のころ対向面
６ｂ…柱部延長部
６ｂａ…柱部延長部のころ対向面
７…ポケット
８，１０…鍔状部
９…潤滑剤保持凹部
１１…貫通孔
ｐｃｄ…ころ配列ピッチ円 DESCRIPTION OF SYMBOLS 1 ... Inner ring 2 ... Outer ring 3 ... Cylindrical roller 3a ... Roller outer peripheral surface 4 ... Cage 5 ... Annular part 6 ... Column part 6a ... Column part main body 6aa ... Roller opposing surface 6b ... Column part extension part 6ba ... Column Roller facing surface 7 of extension portion ... Pockets 8, 10 ... Bridge 9 ... Lubricant holding recess 11 ... Through hole pcd ... Roller array pitch circle

Claims (7)

内輪と外輪との間に、保持器に保持された複数のころが介在し、前記保持器が、環状部およびこの環状部の周方向複数箇所から櫛歯状に突出した複数の柱部を有し、隣合う柱部の間が、ころを保持するポケットとなる櫛形の保持器であるころ軸受において、
前記保持器の前記各柱部に、この柱部のころ案内機能を果たす部分である柱部本体の先端から延長して、潤滑剤を保持する機能を奏する柱部延長部を設け、
前記保持器の前記柱部延長部におけるころ対向面の断面形状が、全面において、前記柱部本体におけるころ対向面よりもころ外周面から離れる断面形状であり、
かつ前記柱部延長部のころ配列ピッチ円付近となる径方向部分に、潤滑剤を保持する潤滑剤保持凹部を設け、前記保持器の前記柱部本体の長さがころ長さよりも短く、かつ前記柱部延長部の先端がころ端面よりも突出し、前記保持器の前記柱部における前記潤滑剤保持凹部を、前記柱部延長部の全長にわたって設け、前記保持器の前記柱部延長部における前記ころ対向面の径方向の外径端に、ポケット内側に突出する鍔状部を設け、この鍔状部の先端位置を、前記柱部本体のころ対向面よりも微小寸法だけころ外周面から離れる位置とした、
ことを特徴とするころ軸受。 A plurality of rollers held by a cage are interposed between the inner ring and the outer ring, and the cage has a ring portion and a plurality of column portions protruding in a comb shape from a plurality of circumferential positions of the ring portion. In a roller bearing that is a comb-shaped cage that becomes a pocket for holding a roller between adjacent column parts,
Each column portion of the cage is provided with a column portion extending from the tip of the column main body that is a portion that performs the roller guiding function of the column portion, and having a function of holding the lubricant,
The cross-sectional shape of the roller facing surface in the column portion extension of the cage is a cross-sectional shape that is farther from the roller outer peripheral surface than the roller facing surface in the column body in the entire surface,
And a radial portion which rollers the vicinity arrangement pitch circle of the pillar portion extension, only setting a lubricant holding recess for holding a lubricant, shorter than the length is around the length of the pillar body of the retainer, And the front-end | tip of the said column part extension part protrudes rather than a roller end surface, The said lubricant holding recessed part in the said column part of the said holder | retainer is provided over the full length of the said column part extension part, and in the said column part extension part of the said holder | retainer A flange-like portion protruding inside the pocket is provided at the radially outer diameter end of the roller facing surface, and the tip position of the flange-shaped portion is slightly smaller than the roller facing surface of the column body from the roller outer peripheral surface. A position to leave ,
A roller bearing characterized by that. 請求項１において、前記保持器の前記柱部延長部のころ対向面の断面形状を、前記鍔状部を除く全体が前記潤滑剤保持凹部となる形状としたころ軸受。 2. The roller bearing according to claim 1 , wherein a cross-sectional shape of a roller facing surface of the column portion extension portion of the cage is a shape in which the entirety excluding the flange portion becomes the lubricant holding recess portion. 請求項１または請求項２において、前記保持器の前記柱部延長部の保持器径方向の厚さを、内径側面および外径側面が共に前記柱部本体と同じ径方向位置となる厚さとしたころ軸受。 In Claim 1 or Claim 2 , the thickness in the cage radial direction of the column portion extension of the cage is set such that the inner diameter side surface and the outer diameter side surface are both in the same radial position as the column body. Roller bearing. 請求項１または請求項２において、前記保持器の前記柱部延長部の保持器径方向の厚さを、内径側端が前記柱部本体よりも大径で、かつ外径側端が前記柱部本体と同じ径方向位置となる厚さとしたころ軸受。 3. The thickness in the cage radial direction of the column extension portion of the cage according to claim 1 , wherein an inner diameter side end is larger in diameter than the column body and an outer diameter side end is the column. Roller bearing with the same radial position as the main body. 請求項１において、前記保持器の前記柱部延長部における前記ころ対向面の径方向の内径端に、ポケット内側へ突出する鍔状部を設け、この鍔状部の先端位置を、前記柱部本体のころ対向面よりも微小寸法だけ外周面から離れる位置としたころ軸受。 In claim 1, the roller opposing surface of the inner radial diameter end of the pillar portion extending portion of the retainer, the flange portion which projects inside pocket is provided, the position of the tip of the flange-shaped portion, said post Roller bearing that is positioned away from the outer peripheral surface by a minute size than the roller facing surface of the main body. 請求項５において、前記保持器の柱部延長部における、両側のころ対向面の前記潤滑剤保持凹部間を貫通する貫通孔を設けたころ軸受。 The roller bearing according to claim 5 , wherein a through-hole penetrating between the lubricant retaining recesses on the roller facing surfaces on both sides in the pillar portion extension portion of the cage is provided. 請求項１ないし請求項６のいずれか１項において、複列の円筒ころ軸受であり、各列の円筒ころをそれぞれ保持する各列の保持器は互いに前記環状部の側で対向し、これら各列の保持器の間隔が０．４ないし０．６ｍｍであるころ軸受。 In any one of claims 1 to 6, a cylindrical roller bearing with double row, cage each column to hold the column of cylindrical rollers each is opposed by the side of the annular portion to each other, each of these Roller bearings in which the distance between the row cages is 0.4 to 0.6 mm.
JP2009222498A 2009-09-28 2009-09-28 Roller bearing Expired - Fee Related JP5351686B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2009222498A JP5351686B2 (en) 2009-09-28 2009-09-28 Roller bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009222498A JP5351686B2 (en) 2009-09-28 2009-09-28 Roller bearing

Publications (2)

Publication Number Publication Date
JP2011069460A JP2011069460A (en) 2011-04-07
JP5351686B2 true JP5351686B2 (en) 2013-11-27

Family

ID=44014913

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2009222498A Expired - Fee Related JP5351686B2 (en) 2009-09-28 2009-09-28 Roller bearing

Country Status (1)

Country Link
JP (1) JP5351686B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7186061B2 (en) * 2018-10-29 2022-12-08 Ntn株式会社 ball bearing
JP6894561B1 (en) * 2020-10-29 2021-06-30 Ｔｐｒ株式会社 Thrust washer

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004162818A (en) * 2002-11-13 2004-06-10 Ntn Corp Cylindrical roller bearing
JP4387162B2 (en) * 2003-11-07 2009-12-16 Ｎｔｎ株式会社 Cylindrical roller bearing
JP2008240766A (en) * 2007-03-26 2008-10-09 Ntn Corp Rolling bearing
JP2009191939A (en) * 2008-02-14 2009-08-27 Nsk Ltd Tapered roller bearing

Also Published As

Publication number Publication date
JP2011069460A (en) 2011-04-07

Similar Documents

Publication Publication Date Title
US8939865B2 (en) Roller bearing
EP2787224B1 (en) Prong type resin cage for double row roller bearing and double row roller bearing
EP2787231B1 (en) Prong type cage for double row roller bearing and double row roller bearing
JP2013145012A (en) Thrust roller bearing and thrust roller bearing apparatus
KR20180041127A (en) Angular contact ball bearings
KR20210044827A (en) Rolling bearings and spindle units equipped with the rolling bearings
WO2017110905A1 (en) Roller bearing
JP5351686B2 (en) Roller bearing
KR20140094614A (en) Rolling bearing
JP2009275722A (en) Rolling bearing
JP2014111954A (en) Rolling bearing device
CN107269688B (en) Rolling bearing
JP2009024796A (en) Rolling bearing
JP5889596B2 (en) Roller bearing
JP4387162B2 (en) Cylindrical roller bearing
JP4322641B2 (en) Cylindrical roller bearing
JP2019168020A (en) Cylindrical roller bearing
JP2005321078A (en) Roller bearing and rolling bearing device
JP2018062942A (en) Rolling bearing
JP2008144879A (en) Retainer for rolling bearing and rolling bearing
JP2007263211A (en) Resin-made crown shaped cage for ball bearing
JP2005163997A (en) Cylindrical roller bearing
JP6606903B2 (en) Rolling bearing
JP6186880B2 (en) Comb cage and rolling bearing
JP5778540B2 (en) Roller bearing

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20120829

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20130524

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20130611

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20130725

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20130820

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20130823

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

LAPS Cancellation because of no payment of annual fees