JP2008240762A - Retainer for cylindrical roller bearing and its manufacturing method - Google Patents

Retainer for cylindrical roller bearing and its manufacturing method Download PDF

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JP2008240762A
JP2008240762A JP2007078115A JP2007078115A JP2008240762A JP 2008240762 A JP2008240762 A JP 2008240762A JP 2007078115 A JP2007078115 A JP 2007078115A JP 2007078115 A JP2007078115 A JP 2007078115A JP 2008240762 A JP2008240762 A JP 2008240762A
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cage
axial direction
cylindrical roller
roller bearing
column
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Naota Yamamoto
直太 山本
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NTN Corp
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NTN Corp
NTN Toyo Bearing Co Ltd
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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
    • F16C33/46—Cages for rollers or needles
    • F16C33/49—Cages for rollers or needles comb-shaped
    • F16C33/494—Massive or moulded comb cages

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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 optionally align angles of respective pillar parts relative to an axial direction of an annular part. <P>SOLUTION: In the manufacturing method for the retainer for the cylindrical roller bearing having a pocket 12 for retaining a plurality of cylindrical rollers 5 between an inner ring 1 and an outer ring 2, a plurality of pillar parts 11 projected in an axial direction and having a through hole 15 in an axial direction are provided on an annular part 9 in a circumferential direction at a constant pitch, and a retainer body 7 provided with a pocket 12 between the adjacent pillar parts 11 is molded by synthetic resin. Pins 17 of a reinforcement fitting 8 in which pins 17 extending in an axial direction are provided on an annular base part 16 at the same pitch as the installation pitch of the pillar part 11 are inserted to the through holes 15 of the respective pillar parts 11 to correct the inclination of the pillar part 11. Thereafter, annealing treatment for retaining attitude after correction of the pillar part 11 is applied. Thereby, the inclination relative to the axial direction of the annular part of the pillar part 11 is corrected and the attitude after correction of the pillar part 11 is retained. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

この発明は、旋盤、マシニングセンタなどの工作機械等、各種機械装置の回転支持部に組み込まれる円筒ころ軸受に用いる保持器に関するものである。   The present invention relates to a cage used for a cylindrical roller bearing incorporated in a rotation support part of various machine devices such as a lathe, a machine tool such as a machining center.

一般に、旋盤、マシニングセンタなどの工作機械や、各種機械装置の回転支持部は、ワークの加工効率や加工精度を高めるなどの理由から高速回転で運転される場合が多く、その回転支持部に使用される円筒ころ軸受は、さらに、高速化、長寿命化に対応する必要がある。   In general, machine tools such as lathes and machining centers, and rotation support parts of various machine devices are often operated at high speeds for reasons such as increasing the machining efficiency and machining accuracy of workpieces. Further, the cylindrical roller bearing needs to cope with higher speed and longer life.

これらの高速化、長寿命化の要求から、円筒ころ軸受の保持器として、従来の高力黄銅鋳物を加工した保持器が使用されていたが、この高力黄銅鋳物による保持器は、高速回転で使用すると、保持器の内外周面、ポケット内面が、内輪や外輪の転動面および円筒ころに接触して摩耗し、摩耗粉が発生する欠点があった。この摩耗粉が潤滑剤中に混入すると、潤滑性能が著しく劣化して焼付きや損傷の原因となっていた。この焼付きや損傷等の問題から、高力黄銅鋳物による保持器に代えて合成樹脂製保持器が用いられている。   Due to these demands for higher speed and longer service life, conventional cages made from high-strength brass castings were used as cages for cylindrical roller bearings. When used in, the inner and outer peripheral surfaces of the cage and the inner surface of the pocket are worn by contact with the rolling surfaces of the inner ring and the outer ring and the cylindrical rollers, and there is a defect that wear powder is generated. When this wear powder is mixed in the lubricant, the lubrication performance is remarkably deteriorated, causing seizure and damage. Because of problems such as seizure and damage, a synthetic resin cage is used instead of a cage made of high-strength brass casting.

この円筒ころ軸受の合成樹脂製保持器としては、例えば、特許文献１に記載のように、環状部と、その環状部の一端面に軸方向に突出した複数の柱部を周方向に定ピッチで設け、隣り合う柱部の周方向側面間に円筒ころを回転可能に保持するポケットを形成した保持器が知られている。
特開２００５−１４０２６９号公報 As a synthetic resin cage for this cylindrical roller bearing, for example, as described in Patent Document 1, an annular portion and a plurality of column portions protruding in the axial direction on one end face of the annular portion are arranged at a constant pitch in the circumferential direction. There is known a cage in which a pocket is formed between the circumferential side surfaces of adjacent column portions to hold a cylindrical roller rotatably.
JP 2005-140269 A

この合成樹脂製の保持器は、例えば、特許文献２に記載のようなトンネルゲート方式の多点ゲート方式で、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。しかし、合成樹脂は射出成形時に熱収縮し、ゲート位置、ウェルド位置による成形収縮のばらつき、金型の出来栄え、または成形機の成形条件のばらつきにより複雑に収縮し、各柱部全てが環状部に対して軸方向の同じ角度に成形するのが困難で、径方向または周方向の傾きにばらつきが発生する。
特願２００５−２２５０５０号公報 This cage made of synthetic resin is, for example, a tunnel gate type multipoint gate system as described in Patent Document 2, for example, polyetheretherketone resin (PEEK), polyamide resin (PA: PA66, PA46), It is formed by injection molding a synthetic resin having a self-lubricating property such as polyphenylene sulfide resin (PPS) (a necessary amount of filler such as carbon fiber (CF) and glass fiber (GF) is blended as required). . However, synthetic resin heat shrinks during injection molding, and shrinks in a complex manner due to variations in molding shrinkage depending on the gate position and weld position, the quality of the mold, and variations in molding conditions of the molding machine. On the other hand, it is difficult to mold at the same angle in the axial direction, and variation occurs in the radial or circumferential inclination.
Japanese Patent Application No. 2005-225050

一部の柱部が極端に傾いた状態の保持器を円筒ころ軸受に組み込めば、軸受の運転時、保持器の一部の傾きの大きい柱部の周方向側面または径方向ポケット面と円筒ころの転動面との接触圧が大きくなり、その接触部分に油膜切れが生じて、異常摩擦の発生や異常な軸受温度上昇の原因となる。   If a cage in which some column parts are extremely inclined is incorporated into a cylindrical roller bearing, the circumferential side surface or radial pocket surface of the cylinder part with a large inclination in part of the cage and the cylindrical roller during operation of the bearing As a result, the contact pressure with the rolling contact surface increases, and the oil film is cut off at the contact portion, causing abnormal friction and abnormal bearing temperature rise.

通常、金型をあらかじめ成形時の収縮を見込んだ形状に作製し，成形収縮後の形状を設計通りに狙うが，これはゲート位置、ウェルド位置による成形収縮のばらつき、金型の出来栄え、または成形機の成形条件のばらつきがあるため、環状部に対する各柱部の成形角度を全て同じ角度に高精度に制御することが難しい。   Normally, molds are prepared in advance with a shape that allows for shrinkage during molding, and the shape after mold shrinkage is aimed as designed. This is due to variations in molding shrinkage depending on the gate position and weld position, the quality of the mold, or molding. Since there are variations in the molding conditions of the machine, it is difficult to accurately control the molding angles of the column portions with respect to the annular portion to the same angle.

そこで、この発明は、環状部の軸方向に対する各柱部の角度を任意のものに揃えることを課題とする。好ましくは環状部の軸方向に対し垂直または少々軸方向の中心に内倒れとする。   Then, this invention makes it a subject to arrange the angle of each pillar part with respect to the arbitrary directions with respect to the axial direction of an annular part. Preferably, it is perpendicular to the axial direction of the annular portion or slightly tilted in the center in the axial direction.

上記の課題を解決するために、この発明の円筒ころ軸受用保持器は、環状部の一端面に軸方向に突出した複数の柱部を周方向に定ピッチで設け、隣り合う前記柱部の間にポケットを形成した合成樹脂製の保持器本体と、環状の基部に軸方向同じ向きに延びるピンを前記柱部の設置ピッチと同ピッチで設けた補強金具とからなり、前記保持器本体の各柱部に軸方向の貫通孔を設け、その各柱部の貫通孔に上記補強金具のピンを挿入した構成を採用したのである。   In order to solve the above-mentioned problems, a cylindrical roller bearing retainer according to the present invention is provided with a plurality of column portions protruding in an axial direction at one end face of an annular portion at a constant pitch in the circumferential direction, and A cage body made of synthetic resin with pockets formed between it, and a reinforcing bracket provided with pins extending in the same direction in the axial direction on the annular base portion at the same pitch as the installation pitch of the pillar portion, A configuration is adopted in which an axial through hole is provided in each column portion, and the pin of the reinforcing metal fitting is inserted into the through hole of each column portion.

この構成によると、合成樹脂製の保持器本体の各柱部が、成形時に環状部の軸方向に対してその傾きがばらついている場合、補強金具のピンを各柱部の貫通孔に挿入すれば、補強金具の各ピンが環状部から軸方向同じ向きに設けられているので、この各ピンにより保持器の各柱部の傾きのばらつきが矯正される。ここで、補強金具のピンの柱部の貫通孔への挿入による嵌め合いは、貫通孔にピンが適合した状態で嵌め合わされて矯正効果の得られるものであればよく、その嵌め合わせ手段は、例えば、圧入によるものや、貫通孔とピンとに隙間のない状態での嵌め合わせであってもよい。また、補強金具は円環ではなく、半円、または環状の一部分として、複数を組み合わせて利用しても良い。また、分離型保持器（セパレイト保持器）のような連結していない円環タイプの保持器でもよい。   According to this configuration, when the pillar portions of the synthetic resin cage main body vary in inclination with respect to the axial direction of the annular portion during molding, the pins of the reinforcing metal fittings are inserted into the through holes of the pillar portions. For example, since each pin of the reinforcing metal fitting is provided in the same direction in the axial direction from the annular portion, variation in inclination of each column portion of the cage is corrected by each pin. Here, the fitting by inserting the reinforcing metal fitting into the through-hole of the column portion of the pin may be any one that can be fitted with the through-hole in a state in which the pin is fitted to obtain a correction effect, and the fitting means is For example, it may be press fitting or fitting with no gap between the through hole and the pin. Further, a plurality of reinforcing metal fittings may be used in combination as a semicircle or a part of a ring instead of a ring. Further, a ring-type cage that is not connected, such as a separate cage (separate cage) may be used.

上記保持器本体の形状としては、上記保持器本体が、上記補強金具の基部を嵌め合わせる嵌合溝を上記環状部の他端面に有しており、その嵌合溝の溝底に上記貫通孔を設けたものとすると、補強金具の基部が保持器本体の環状部の嵌合溝内に収まるので、補強金具が保持器本体から突き出さず、円筒ころ軸受用保持器の軸方向の寸法を変更する必要がなくなる。   As the shape of the cage body, the cage body has a fitting groove on the other end surface of the annular portion for fitting the base of the reinforcing metal fitting, and the through hole is formed in the groove bottom of the fitting groove. Since the base of the reinforcing bracket fits in the fitting groove of the annular portion of the cage body, the reinforcing bracket does not protrude from the cage body, and the axial dimension of the cylindrical roller bearing cage is reduced. No need to change.

また、この発明の円筒ころ軸受用保持器の作製方法は、環状部の一端面に軸方向に突出し軸方向に貫通孔を有する複数の柱部を周方向に定ピッチで設け、隣り合う前記柱部の間にポケットを備えた保持器本体を合成樹脂により成形し、環状の基部に軸方向同じ向きに延びるピンを上記柱部の設置ピッチと同ピッチで設けた補強金具のピンを、前記環状部の他端面側から前記各柱部の貫通孔に挿入して前記柱部の傾きを矯正し、その後、前記柱部の矯正後の姿勢を保持するためのアニール処理を施す方法を採用することができる。   Further, in the manufacturing method of the cylindrical roller bearing retainer according to the present invention, a plurality of column portions protruding in the axial direction and having through holes in the axial direction are provided at one end face of the annular portion at a constant pitch in the circumferential direction, and the adjacent columns A cage body having pockets between the parts is molded from a synthetic resin, and a pin of a reinforcing bracket provided with pins extending in the same direction in the axial direction on the annular base is provided at the same pitch as the installation pitch of the column part. Adopting a method of correcting the inclination of the column part by inserting it into the through hole of each column part from the other end surface side of the part, and then performing an annealing process for maintaining the post-correction posture of the column part Can do.

上記方法により円筒ころ軸受用保持器を作製すれば、保持器本体の柱部の傾きを補強金具により矯正した状態でアニール処理が施されるので、矯正される柱部の内部応力が取り除かれて、矯正後の姿勢を保持した合成樹脂製の保持器を得ることができる。   If a cage for cylindrical roller bearings is produced by the above method, the annealing treatment is performed in a state where the inclination of the pillar portion of the cage body is corrected by the reinforcing bracket, so that the internal stress of the pillar portion to be corrected is removed. A cage made of synthetic resin that maintains the post-correction posture can be obtained.

また、この発明の円筒ころ軸受は、内輪と外輪との相互間に間隔をおいて複数の円筒ころを保持する保持器を備える円筒ころ軸受において、前記保持器が上記したいずれかの円筒ころ軸受用保持器である構成を採用することができる。   Further, the cylindrical roller bearing of the present invention is a cylindrical roller bearing comprising a cage for holding a plurality of cylindrical rollers at intervals between an inner ring and an outer ring, wherein the cage is any of the cylindrical roller bearings described above. It is possible to adopt a configuration that is a cage.

以上のように、この発明は、保持器本体に補強金具を挿入することにより、保持器本体の各柱部の環状部の軸方向に対する傾きを矯正して、その傾きを任意のものとすることができる。   As described above, the present invention corrects the inclination of the annular portion of each column portion of the cage body with respect to the axial direction by inserting the reinforcing metal fitting into the cage body, and makes the inclination arbitrary. Can do.

また、保持器本体の柱部に補強金具のピンが挿入され、各柱部が補強されるので、円筒ころ軸受の高速回転時、回転の遠心力による柱部先端部の外径方向への弾性変形を抑制する。   In addition, since the pins of the reinforcing metal fittings are inserted into the pillar portions of the cage body and the respective pillar portions are reinforced, the cylindrical roller bearing is elastic at the tip end portion of the pillar portion due to the centrifugal force of rotation when rotating at high speed. Suppress deformation.

以下、この発明の実施形態を図１〜図３に示す。この実施形態の円筒ころ軸受は、図１（ａ）、（ｂ）に示すように、複列の軌道面３を有する内輪１と、複列の軌道面４を有する外輪２と、この内輪１と外輪２とのそれぞれの軌道面３、４の相互間に周方向に転動可能に組み込まれる複列の円筒ころ５と、各列の円筒ころ５を周方向に所定間隔をおいて保持する一対の保持器６とから構成される。なお、上記円筒ころ軸受は、図示するように複列円筒ころ軸受に限定されるものでなく、単列円筒ころ軸受や多列円筒ころ軸受であってもよい。   Embodiments of the present invention are shown in FIGS. As shown in FIGS. 1A and 1B, the cylindrical roller bearing of this embodiment includes an inner ring 1 having a double row raceway surface 3, an outer ring 2 having a double row raceway surface 4, and the inner ring 1. Between the raceway surfaces 3 and 4 of the outer ring 2 and the outer ring 2, and the double row cylindrical rollers 5 incorporated so as to roll in the circumferential direction, and the cylindrical rollers 5 in each row are held at predetermined intervals in the circumferential direction. It comprises a pair of cages 6. The cylindrical roller bearing is not limited to a double row cylindrical roller bearing as shown in the figure, and may be a single row cylindrical roller bearing or a multi-row cylindrical roller bearing.

上記保持器６は、図２に示すように、合成樹脂製の保持器本体７と、金属製の補強金具８とを組み合わせたものである。上記保持器本体７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）等の充填材を適宜配合する。）を射出成形により形成したものである。   As shown in FIG. 2, the cage 6 is a combination of a cage body 7 made of synthetic resin and a metal reinforcing bracket 8. The cage body 7 is made of, for example, a synthetic resin having a self-lubricating property such as polyetheretherketone resin (PEEK), polyamide resin (PA: PA66, PA46), polyphenylene sulfide resin (PPS) (carbon fiber if necessary) (CF) and a filler such as glass fiber (GF) are appropriately blended.) Is formed by injection molding.

この保持器本体７は、図２に示すように、円環状の環状部９と、この環状部９の一端面１０に軸方向に突出した複数の柱部１１とを有し、この各柱部１１が環状部９に周方向に定ピッチで配列される。   As shown in FIG. 2, the retainer body 7 includes an annular annular portion 9 and a plurality of column portions 11 protruding in the axial direction on one end surface 10 of the annular portion 9. 11 are arranged on the annular portion 9 at a constant pitch in the circumferential direction.

その隣り合う柱部１１、１１の周方向側面の間に、円筒ころ５を回転可能に保持する複数のポケット１２が形成される。各ポケット１２は隣り合う柱部１１、１１の周方向側面と、環状部９の一端面１０とに囲まれ、軸方向の一方に向かって開口している。   A plurality of pockets 12 that rotatably hold the cylindrical roller 5 are formed between the circumferential side surfaces of the adjacent column portions 11 and 11. Each pocket 12 is surrounded by the circumferential side surfaces of the adjacent column portions 11 and 11 and the one end surface 10 of the annular portion 9 and opens toward one side in the axial direction.

上記保持器本体７の環状部９は、その他端面１３の全周にわたって嵌合溝１４が設けられ、この嵌合溝１４は、その開口縁部の両側に径方向の突条１８が形成されるとともに、その溝底に各柱部１１の中心を通る貫通孔１５が形成される。この嵌合溝１４に補強金具８の基部１６を強引に押し込んで突条１８を越えて無理嵌めすると（図４（ｃ）参照）、突条１８により補強金具８が保持されて、保持器本体７から脱落するのを防止する。   The annular portion 9 of the retainer body 7 is provided with a fitting groove 14 over the entire circumference of the other end surface 13, and the fitting groove 14 is formed with radial protrusions 18 on both sides of the opening edge thereof. At the same time, a through hole 15 passing through the center of each column 11 is formed at the groove bottom. When the base portion 16 of the reinforcing bracket 8 is forcibly pushed into the fitting groove 14 and forcibly fitted beyond the protrusion 18 (see FIG. 4C), the reinforcing bracket 8 is held by the protrusion 18 and the cage body 7 is prevented from falling off.

また、嵌合溝１４の各貫通孔１５は、図３に示すように、補強金具８のピン１７が挿入可能となっている。ここで、補強金具８のピン１７の、柱部１１の貫通孔１５への挿入による嵌め合いは、貫通孔１５にピン１７が適合した状態で嵌め合わされて矯正効果の得られるものであればよく、その嵌め合わせ手段は、例えば、圧入によるものや、貫通孔１５とピン１７とに隙間のない状態での嵌め合わせであってもよい。   Moreover, as shown in FIG. 3, the pin 17 of the reinforcement metal fitting 8 can be inserted in each through-hole 15 of the fitting groove 14. Here, the fitting of the pin 17 of the reinforcing metal fitting 8 by insertion into the through hole 15 of the column part 11 may be any as long as the pin 17 is fitted in the through hole 15 and the correction effect is obtained. The fitting means may be, for example, press fitting or fitting in a state where there is no gap between the through hole 15 and the pin 17.

上記保持器本体７に組み合わされる補強金具８は、保持器本体７よりも剛性が高い金属、例えば、高力黄銅、炭素鋼、ステンレス鋼、工具鋼、アルミニウムやカーボンなどで形成されたものであり、円環状の基部１６と、この基部１６に軸方向同じ向きに延びる複数のピン１７とを有している。そのピン１７は柱部１１の設置ピッチと同ピッチで基部１６の周方向に配列している。なお、このピン１７は、基部１６の軸方向に対し狙いの角度、例えば、基部１６の軸方向に対し少々軸方向の中心に（内径方向に）内倒れとしてもよい。   The reinforcing metal fitting 8 combined with the cage main body 7 is formed of a metal having higher rigidity than the cage main body 7, for example, high-strength brass, carbon steel, stainless steel, tool steel, aluminum or carbon. The base 16 has an annular base 16 and a plurality of pins 17 extending in the same direction in the axial direction. The pins 17 are arranged in the circumferential direction of the base portion 16 at the same pitch as the installation pitch of the column portions 11. The pin 17 may be inclined inward (in the inner diameter direction) at a target angle with respect to the axial direction of the base portion 16, for example, a little in the axial center with respect to the axial direction of the base portion 16.

上記基部１６は、その径方向の中心線のなす中心円Ｃ２が、上記環状部９の径方向の中心線のなす中心円Ｃ１と同じ直径となるように形成されるとともに、この基部１６の厚さが嵌合溝１４の深さよりも小さく形成される（図３参照）。   The base portion 16 is formed such that a central circle C2 formed by the radial center line thereof has the same diameter as the central circle C1 formed by the radial center line of the annular portion 9, and the thickness of the base portion 16 is increased. Is formed smaller than the depth of the fitting groove 14 (see FIG. 3).

このように基部１６を形成すれば、補強金具８を保持器本体７に挿入した際、補強金具８の基部１６が嵌合溝１４に嵌まり合い、環状部９の背面から突出しない（図４（ｂ）参照）。環状部９が突出しなければ、円筒ころ軸受用保持器の軸方向の寸法変更する必要がなくなる。   If the base portion 16 is formed in this way, when the reinforcing bracket 8 is inserted into the retainer body 7, the base portion 16 of the reinforcing bracket 8 fits into the fitting groove 14 and does not protrude from the back surface of the annular portion 9 (FIG. 4). (See (b)). If the annular portion 9 does not protrude, there is no need to change the axial dimension of the cylindrical roller bearing retainer.

このように構成される円筒ころ軸受の保持器６の作製方法としては、まず、上述した保持器本体７を成形する。この成形方法は、例えば、射出成形等の通常の方法で成形することができる。   As a manufacturing method of the cage 6 of the cylindrical roller bearing configured as described above, first, the cage body 7 described above is formed. This molding method can be molded by a normal method such as injection molding.

次に、図４（ｂ）に示すように、成形した保持器本体７の各貫通孔１５に、上記補強金具８のピン１７を環状部９の他端面１３側から挿入し、補強金具８の基部１６を嵌合溝１４に無理嵌めにより嵌め合わせる。このとき、補強金具８を嵌め合わせる保持器本体７は成形時にゲート位置、ウェルド位置の影響による成形収縮のばらつきや成形条件のばらつきにより、各柱部１１が狙いの角度に対して周方向または径方向にばらつき、角度α傾くことがある（図４（ａ）参照）。   Next, as shown in FIG. 4 (b), the pins 17 of the reinforcing metal fitting 8 are inserted into the through holes 15 of the molded cage body 7 from the other end face 13 side of the annular portion 9. The base 16 is fitted into the fitting groove 14 by forcible fitting. At this time, the retainer body 7 to which the reinforcing metal fitting 8 is fitted is formed in the circumferential direction or the diameter of each column portion 11 with respect to the target angle due to variations in molding shrinkage and molding conditions due to the influence of the gate position and weld position during molding. The direction may vary and the angle α may be inclined (see FIG. 4A).

各柱部１１が傾いた場合であっても、補強金具８を嵌め合わせることにより、保持器本体７の各柱部１１の傾きが矯正される。補強金具８は、合成樹脂製の保持器本体７の剛性よりも高く、各ピン１７が基部１６に軸方向同じ向きに設けられているので、そのピン１７の挿入により、保持器本体７の柱部１１は、環状部９の軸方向ｐに対する傾きが矯正され、その角度を揃えることができるのである（図４（ｃ）参照）。   Even if each column portion 11 is inclined, the inclination of each column portion 11 of the cage body 7 is corrected by fitting the reinforcing metal fittings 8 together. The reinforcing metal fitting 8 is higher in rigidity than the cage body 7 made of synthetic resin, and the pins 17 are provided in the base 16 in the same direction in the axial direction. The portion 11 can correct the inclination of the annular portion 9 with respect to the axial direction p and can make the angle uniform (see FIG. 4C).

図４（ｃ）に示した補強金具８による矯正後、保持器本体７をこれに嵌め合わせた補強金具８とともにアニール処理を施す。このアニール処理の処理温度は、保持器本体７の合成樹脂材のガラス転移温度以上且つ融点未満であればよい。例えば、ポリエーテルエーテルケトン（ＰＥＥＫ）の場合、１５０℃〜２３０℃の間の温度で施される。アニール処理を施すことにより、各柱部１１の残留応力が取り除かれて、各柱部１１が、矯正後の環状部９に対する角度が揃った姿勢（環状部９に対して軸方向ｐに突出する姿勢）に保持される。   After correction by the reinforcing metal fitting 8 shown in FIG. 4 (c), annealing treatment is performed together with the reinforcing metal fitting 8 in which the cage body 7 is fitted. The processing temperature of this annealing process should just be more than the glass transition temperature of the synthetic resin material of the holder body 7, and less than melting | fusing point. For example, in the case of polyetheretherketone (PEEK), it is applied at a temperature between 150 ° C and 230 ° C. By applying the annealing treatment, the residual stress of each column portion 11 is removed, and each column portion 11 protrudes in the axial direction p with respect to the annular portion 9 after the correction. Posture).

このようにして、柱部１１の傾きが矯正された円筒ころ軸受用の保持器６が作製される。この保持器６のポケット１２に円筒ころ５を保持させた状態で、円筒ころ軸受に組み込んで運転させると、柱部１１はその傾きが矯正され、環状部９に対する角度が揃った姿勢となっているので、柱部１１の周方向側面と円筒ころ５の転動面との接触圧が異常に大きくならず、円筒ころ５がポケット１２内で円滑に転動する。   In this way, the cylindrical roller bearing retainer 6 in which the inclination of the column portion 11 is corrected is produced. When the cylindrical roller 5 is held in the pocket 12 of the cage 6 and is operated by being incorporated in the cylindrical roller bearing, the inclination of the column portion 11 is corrected, and the angle with respect to the annular portion 9 is uniform. Therefore, the contact pressure between the circumferential side surface of the column portion 11 and the rolling surface of the cylindrical roller 5 does not become abnormally large, and the cylindrical roller 5 rolls smoothly in the pocket 12.

また、保持器６は、柱部１１にピン１７が挿入されて、各柱部１１が補強されているので、円筒ころ軸受の高速運転時、回転の遠心力による柱部１１先端部の外径方向への弾性変形が抑制される。弾性変形が抑制されれば、柱部１１の周方向側面の先端部と円筒ころ５の転動面との過大な接触を防止するとともに、軸受温度の上昇を防止する。   Moreover, since the cage | basket 6 inserts the pin 17 in the pillar part 11 and each pillar part 11 is reinforced, the outer diameter of the front-end | tip part of the pillar part 11 by the centrifugal force of rotation at the time of high speed operation of a cylindrical roller bearing. Elastic deformation in the direction is suppressed. If the elastic deformation is suppressed, excessive contact between the distal end portion of the circumferential side surface of the column portion 11 and the rolling surface of the cylindrical roller 5 is prevented, and an increase in bearing temperature is prevented.

（ａ）この発明の実施形態の円筒ころ軸受の一部断面図、（ｂ）図１（ａ）ｂ−ｂ線の一部切り欠き断面図。(A) Partial sectional view of a cylindrical roller bearing of an embodiment of the present invention, (b) FIG. 1 (a) a partially cutaway sectional view taken along line bb. 同上の実施形態の保持器の分解斜視図。The disassembled perspective view of the holder | retainer of embodiment same as the above. 同上の保持器本体に補強金具を嵌め合わす状態を示す一部拡大斜視図Partially enlarged perspective view showing a state in which the reinforcing metal fitting is fitted to the cage body same as above （ａ）同上の成形後の保持器本体を示す断面図、（ｂ）同上の保持器本体を補強金具で矯正した状態を示す断面図、（ｃ）同上の補強金具を抜け止めした状態を示す断面図(A) Cross-sectional view showing the cage main body after molding same as above, (b) Cross-sectional view showing a state where the cage main body same as above is corrected with reinforcing metal fittings, (c) Shown with a state where the same reinforcing metal fitting is prevented from coming off. Cross section

符号の説明Explanation of symbols

１ 内輪
２ 外輪
３ 軌道面
４ 軌道面
５ 円筒ころ
６ 保持器
７ 保持器本体
８ 補強金具
９ 環状部
１０ 一端面
１１ 柱部
１２ ポケット
１３ 他端面
１４ 嵌合溝
１５ 貫通孔
１６ 基部
１７ ピン
１８ 突条
Ｃ１ 中心円（保持器本体）
Ｃ２ 中心円（補強金具） DESCRIPTION OF SYMBOLS 1 Inner ring 2 Outer ring 3 Raceway surface 4 Raceway surface 5 Cylindrical roller 6 Cage 7 Cage body 8 Reinforcing bracket 9 Annular portion 10 One end surface 11 Column portion 12 Pocket 13 Other end surface 14 Fitting groove 15 Through hole 16 Base portion 17 Pin 18 Projection Article C1 center circle (main body of the cage)
C2 Center circle (reinforcing metal fittings)

Claims (4)

環状部(９)の一端面(１０)に軸方向に突出した複数の柱部(１１)を周方向に定ピッチで設け、隣り合う前記柱部(１１)の間にポケット(１２)を形成した合成樹脂製の保持器本体(７)と、
環状の基部(１６)に軸方向同じ向きに延びるピン(１７)を上記柱部(１１)の設置ピッチと同ピッチで設けた補強金具(８)とからなり、
上記保持器本体(７)の各柱部(１１)に軸方向の貫通孔(１５)を設け、その各柱部(１１)の貫通孔(１５)に上記補強金具(８)のピン(１７)を挿入した円筒ころ軸受用保持器。 A plurality of column portions (11) protruding in the axial direction are provided at one end face (10) of the annular portion (9) at a constant pitch in the circumferential direction, and pockets (12) are formed between the adjacent column portions (11). A cage body (7) made of synthetic resin,
A reinforcing bracket (8) provided with pins (17) extending in the same direction in the axial direction on an annular base (16) at the same pitch as the installation pitch of the column (11),
An axial through hole (15) is provided in each column portion (11) of the cage body (7), and the pin (17) of the reinforcing bracket (8) is inserted into the through hole (15) of each column portion (11). ) Inserted cylindrical roller bearing cage. 上記保持器本体(７)は、上記補強金具(８)の基部(１６)を嵌め合わせる嵌合溝(１４)を上記環状部(９)の他端面(１３)に有しており、その嵌合溝(１４)の溝底に上記貫通孔(１５)を設けた請求項１に記載の円筒ころ軸受用保持器。   The cage body (7) has a fitting groove (14) for fitting the base portion (16) of the reinforcing metal fitting (8) in the other end surface (13) of the annular portion (9). The cylindrical roller bearing retainer according to claim 1, wherein the through hole (15) is provided in the groove bottom of the mating groove (14). 環状部(９)の一端面(１０)に軸方向に突出し軸方向に貫通孔(１５)を有する複数の柱部(１１)を周方向に定ピッチで設け、隣り合う前記柱部(１１)の間にポケット(１２)を備えた保持器本体(７)を合成樹脂により成形し、
環状の基部(１６)に軸方向同じ向きに延びるピン(１７)を上記柱部(１１)の設置ピッチと同ピッチで設けた補強金具(８)のピン(１７)を、上記環状部(９)の他端面(１３)側から前記各柱部(１１)の貫通孔(１５)に挿入して前記柱部(１１)の傾きを矯正し、
その後、上記柱部(１１)の矯正後の姿勢を保持するためのアニール処理を施す円筒ころ軸受用保持器の作製方法。 A plurality of column portions (11) projecting in the axial direction on one end face (10) of the annular portion (9) and having through holes (15) in the axial direction are provided at a constant pitch in the circumferential direction, and the adjacent column portions (11) A cage body (7) having a pocket (12) in between is molded from synthetic resin,
The pin (17) of the reinforcing metal fitting (8) in which the pin (17) extending in the same axial direction on the annular base portion (16) is provided at the same pitch as the installation pitch of the column portion (11) is connected to the annular portion (9). ) Is inserted into the through hole (15) of each column portion (11) from the other end surface (13) side to correct the inclination of the column portion (11),
Then, the manufacturing method of the cage for cylindrical roller bearings which performs the annealing process for hold | maintaining the post-correction attitude | position of the said pillar part (11). 内輪(１)と外輪(２)との相互間に間隔をおいて複数の円筒ころ(５)を保持する保持器を備える円筒ころ軸受において、
前記保持器(６)が、請求項１または請求項２に記載の円筒ころ軸受用保持器であることを特徴とする円筒ころ軸受。 In a cylindrical roller bearing provided with a cage for holding a plurality of cylindrical rollers (5) at intervals between an inner ring (1) and an outer ring (2),
A cylindrical roller bearing, wherein the cage (6) is the cylindrical roller bearing cage according to claim 1 or 2.
JP2007078115A 2007-03-26 2007-03-26 Retainer for cylindrical roller bearing and its manufacturing method Pending JP2008240762A (en)

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Family

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