JP2011117542A - Rolling bearing and retainer for rolling bearing - Google Patents

Rolling bearing and retainer for rolling bearing Download PDF

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Publication number
JP2011117542A
JP2011117542A JP2009276033A JP2009276033A JP2011117542A JP 2011117542 A JP2011117542 A JP 2011117542A JP 2009276033 A JP2009276033 A JP 2009276033A JP 2009276033 A JP2009276033 A JP 2009276033A JP 2011117542 A JP2011117542 A JP 2011117542A
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cage
peripheral surface
rolling
rolling element
retainer
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JP5506354B2 (en
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Futoshi Kosugi
太 小杉
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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
    • F16C33/38—Ball cages
    • F16C33/3806—Details of interaction of cage and race, e.g. retention, centring
    • 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
    • F16C33/38—Ball cages
    • F16C33/3837—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages
    • F16C33/3843—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages
    • F16C33/3856—Massive or moulded cages having cage pockets surrounding the balls, e.g. machined window cages formed as one-piece cages, i.e. monoblock cages made from plastic, e.g. injection moulded window 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact

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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 rolling bearing and a retainer for the rolling bearing which can reduce part management man-hours as types of retainers are integrated. <P>SOLUTION: A retainer 4 of the rolling bearing is shaped so that it can be assembled in the axial assembling direction of any of the regular and reverse directions, and a relationship between a radial clearance B between a rolling element 3 and a rolling element retaining projection 4a when a rolling element 3 is located at a neutral location in a pocket Pt of the retainer 4, and a radial clearance G, between a circumferential surface section 4ba at a projection side of the retainer 4 and an outer ring inner circumferential surface 2h opposed to this circumferential surface section 4ba indicates G<B. A state where the retainer 4 is assembled in the regular direction makes a retainer guiding type for guiding an outer ring such that the circumferential surface section 4ba at the projection side of the retainer 4 contacts with the outer ring inner circumferential surface 2h. A state where the retainer 4 is assembled in the reverse direction makes a retainer guiding type for guiding the rolling element such that the rolling element 3 contacts with the rolling element retaining projection 4a. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

この発明は、工作機械主軸等に用いられる転がり軸受および転がり軸受用保持器に関するものである。   The present invention relates to a rolling bearing and a rolling bearing retainer used for a machine tool main shaft and the like.

転がり軸受の保持器の案内方式には、転動体案内方式および軌道輪案内方式がある。
工作機械主軸等に使用されるアンギュラ玉軸受の保持器は、通常、図６に示す転動体案内方式の保持器５０であることが多い（特許文献１）。しかし、高速領域まで使用される場合は、図７に示す外輪５１もしくは内輪で案内される前記軌道輪案内方式の保持器５２が適用される。この軌道輪案内方式の保持器５２の材料としては、フェノール樹脂やその他の合成樹脂等が使用されることが多い。 Roller bearing cage guide systems include a rolling element guide system and a bearing ring guide system.
The angular ball bearing cage used for a machine tool spindle or the like is usually a rolling element guide type cage 50 shown in FIG. 6 (Patent Document 1). However, when used up to a high speed region, the bearing ring guide type cage 52 guided by the outer ring 51 or the inner ring shown in FIG. 7 is applied. As a material of the bearing ring guide type cage 52, a phenol resin or other synthetic resin is often used.

特開２００５−９０６９２号公報JP 2005-90692 A

例えば、軌道輪案内方式の保持器をグリース潤滑で使用すると、稀に保持器音と呼ばれる異音が発生することがある。その場合には、転動体案内方式の保持器とすることで、保持器音の発生を抑えることができる。従来技術では、このように二種類の保持器案内形式の軸受を製作するにつき、各保持器案内形式毎に別の保持器が必要であった。   For example, when a bearing ring guide type cage is used for grease lubrication, an unusual noise called a cage noise may occur in rare cases. In that case, generation of cage noise can be suppressed by using a rolling element guide type cage. In the prior art, when producing two types of cage guide type bearings in this way, a separate cage is required for each cage guide type.

この発明の目的は、保持器の品種を統合し、部品管理工数を削減することができる転がり軸受および転がり軸受用保持器を提供することである。   An object of the present invention is to provide a rolling bearing and a rolling bearing cage capable of integrating the types of cages and reducing the number of parts management man-hours.

この発明の転がり軸受は、内外の軌道輪、およびこれら内外の軌道輪の軌道面間に介在した複数の転動体を有し、これら転動体が、環状の保持器の円周方向複数箇所に設けられた各ポケットに保持された転がり軸受において、前記保持器は、前記各ポケット内の保持器内径側縁にポケット内側へ突出した転動体保持突部を有し、かつ内外いずれかの周面におけるポケットに対する軸方向の一方の周面部分と他方の周面部分とに径方向の段差があり、前記保持器は、軌道輪に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状であり、前記転動体が保持器のポケット内の中立位置にあるときの前記転動体と前記転動体保持突部との間の径方向隙間Ｂと、前記保持器の前記段差を成す周面部分のうちの突出側の周面部分と、この周面部分に対向する軌道輪の周面との径方向隙間Ｇとの関係につき、Ｇ＜Ｂとしたことを特徴とする。   The rolling bearing according to the present invention has inner and outer races and a plurality of rolling elements interposed between the raceways of the inner and outer races, and the rolling elements are provided at a plurality of locations in the circumferential direction of the annular cage. In the rolling bearing held in each of the pockets, the cage has a rolling element holding projection that protrudes inward from the inner diameter side edge of the cage in each pocket, and on either the inner or outer peripheral surface. There is a step in the radial direction between the one peripheral surface part and the other peripheral surface part in the axial direction with respect to the pocket, and the cage can be installed in either the forward or reverse direction of the axial direction of the bearing ring. A radial gap B between the rolling element and the rolling element holding projection when the rolling element is in a neutral position in the pocket of the cage, and a circumference forming the step of the cage. A peripheral surface portion on the protruding side of the surface portion; Of every relationship between radial gap G between the peripheral surface of the opposing bearing ring on the peripheral surface portion, characterized in that the G <B.

前記転動体が保持器のポケット内の「中立位置」にあるときとは、転動体がピッチ円上に等配に位置されて各ポケット中心線上に転動体中心があり、ピッチ円中心と保持器中心が一致した位置関係にあるときを言う。
この構成によると、前記転動体が保持器のポケット内の中立位置にあるときの前記転動体と前記転動体保持突部との間の径方向隙間Ｂと、保持器の突出側の周面部分とこの周面部分に対向する軌道輪の周面との径方向隙間Ｇとの関係をＧ＜Ｂとしたため、前記保持器を内外の軌道輪に対して正方向に組み込んだ状態では、保持器の前記突出側の周面部分が、これに対向する軌道輪の周面に接するが、前記転動体が前記転動体保持突部に接触することのない軌道輪案内の保持器案内形式となり、前記保持器を内外の軌道輪に対して逆方向に組み込んだ状態では、前記転動体が前記転動体保持突部に接触するが、保持器の前記突出側の周面部分が、これに対向する軌道輪の周面に接することのない転動体案内の保持器案内形式となる。
このように、保持器の組み込み方向を正逆に変えることで、内外の軌道輪に対する保持器の案内形式を軌道輪案内形式と、転動体案内形式とに変えることができる。このため、一種類の保持器で、軌道輪案内形式の転がり軸受と、転動体案内形式の転がり軸受を製造することができる。これにより、保持器の品種を統合し、部品管理工数を削減することができる。 When the rolling elements are in the “neutral position” in the pocket of the cage, the rolling elements are equally positioned on the pitch circle, and there are rolling element centers on each pocket center line. This is when the centers are in the same positional relationship.
According to this configuration, the radial gap B between the rolling element and the rolling element holding projection when the rolling element is in a neutral position in the cage pocket, and the peripheral surface portion on the protruding side of the cage And the radial gap G between the circumferential surface of the bearing ring and the circumferential surface facing the circumferential surface portion is set to G <B. Therefore, in a state where the cage is incorporated in the forward direction with respect to the inner and outer races, The projecting-side peripheral surface portion of the bearing ring contacts the peripheral surface of the raceway ring opposite thereto, but the rolling element does not come into contact with the rolling element holding projection, and becomes a cage guide type of the raceway guide, In a state in which the cage is incorporated in the opposite direction with respect to the inner and outer races, the rolling element comes into contact with the rolling element holding projection, but the circumferential surface portion on the protruding side of the cage is opposed to the raceway. It is a cage guide type of rolling element guide that does not contact the circumferential surface of the ring.
Thus, by changing the assembling direction of the cage in the forward and reverse directions, the guide type of the cage with respect to the inner and outer races can be changed into a raceway guide form and a rolling element guide form. For this reason, the rolling bearing guide type rolling bearing and the rolling element guide type rolling bearing can be manufactured with one type of cage. As a result, the types of cages can be integrated, and the number of parts management steps can be reduced.

前記保持器の前記突出側の周面部分が接する軌道輪が、外輪であって、前記保持器を前記正方向に組み込んだ状態では外輪案内の保持器案内形式となるものであっても良い。
前記保持器の前記突出側の周面部分が接する軌道輪が、内輪であって、前記保持器を前記正方向に組み込んだ状態では内輪案内の保持器案内形式となるものであっても良い。
転がり軸受は、前記転動体を玉とした玉軸受であっても良い。 The bearing ring in contact with the protruding peripheral surface portion of the cage may be an outer ring, and in a state where the cage is incorporated in the forward direction, a cage guide type of an outer ring guide may be used.
The bearing ring with which the peripheral surface portion on the protruding side of the retainer is in contact may be an inner ring, and in a state in which the retainer is incorporated in the forward direction, an inner ring guide retainer guide type may be used.
The rolling bearing may be a ball bearing in which the rolling element is a ball.

アンギュラ玉軸受であって、前記保持器の突出側の周面部分は、前記正方向に組み込んだ状態では、軌道輪の背面側の周面部分に接するものであっても良い。
前記保持器が合成樹脂からなるものであっても良い。この場合、金型により保持器の量産化を図れ、例えば金属を切削加工してなる保持器よりも、保持器１個あたりの製造コストの低減を図ることが可能となる。
前記保持器が金属からなるものであっても良い。この場合、保持器の剛性を高め、軸受の高回転化を図れる。 In the angular ball bearing, the peripheral surface portion on the protruding side of the cage may be in contact with the peripheral surface portion on the back surface side of the raceway in a state where the cage is incorporated in the positive direction.
The cage may be made of a synthetic resin. In this case, mass production of the cage can be achieved by the mold, and it becomes possible to reduce the manufacturing cost per cage, for example, compared with a cage formed by cutting metal.
The cage may be made of metal. In this case, it is possible to increase the rigidity of the cage and increase the rotation speed of the bearing.

前記保持器は、前記突出側の周面部分を形成する突出側周面部分形成部品を、保持器本体に組付けることで一体に形成したものであっても良い。この場合、保持器の周面部分と、この周面部分に対向する軌道輪の周面との径方向隙間Ｇを容易に設計変更することができる。また、共通の保持器本体に対し、外輪案内の保持器案内形式となる突出側周面部分形成部品を組み付けても良いし、内輪案内の保持器案内形式となる突出側周面部分形成部品を組み付けても良い。この場合、保持器本体の部品の兼用性を高めることができる。また、この保持器から突出側周面部分形成部品を除いた保持器本体のみを用いて転動体案内形式の保持器とすることも可能となる。   The retainer may be integrally formed by assembling a projecting side peripheral surface part forming part that forms the projecting side peripheral surface part to the retainer body. In this case, the design of the radial gap G between the peripheral surface portion of the cage and the peripheral surface of the bearing ring facing the peripheral surface portion can be easily changed. In addition, a protruding peripheral surface part forming part that forms a cage guide type for an outer ring guide may be assembled to a common cage main body, or a protruding side peripheral surface part forming part that forms a cage guide type for an inner ring guide. It may be assembled. In this case, the combined use of the parts of the cage body can be enhanced. It is also possible to use a rolling element guide type cage by using only the cage body excluding the protruding peripheral surface portion forming component from the cage.

この発明の転がり軸受用保持器は、内外の軌道輪、およびこれら内外の軌道輪の軌道面間に介在した複数の転動体を有し、これら転動体が、環状の保持器の円周方向複数箇所に設けられた各ポケットに保持された転がり軸受に用いられる転がり軸受用保持器において、前記保持器は、前記各ポケット内の保持器内径側縁にポケット内側へ突出した転動体保持突部を有し、かつ内外いずれかの周面におけるポケットに対する軸方向の一方の周面部分と他方の周面部分とに径方向の段差があり、前記保持器は、軌道輪に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状であり、前記転動体が保持器のポケット内の中立位置にあるときの前記転動体と前記転動体保持突部との間の径方向隙間Ｂと、前記保持器の前記段差を成す周面部分のうちの突出側の周面部分と、この周面部分に対向する軌道輪の周面との径方向隙間Ｇとの関係につき、Ｇ＜Ｂとしたことを特徴とする。
この構成によると、一種類の保持器で、軌道輪案内形式の転がり軸受と、軌道輪案内形式の転がり軸受を製造することができる。これにより、保持器の品種を統合し、部品管理工数を削減することができる。
前記保持器は、前記突出側の周面部分を形成する突出側周面部分形成部品を、保持器本体に組付けることで一体に形成したものであっても良い。 The rolling bearing retainer of the present invention has inner and outer race rings and a plurality of rolling elements interposed between the raceway surfaces of the inner and outer race rings. In a rolling bearing retainer used for a rolling bearing retained in each pocket provided at a location, the retainer has a rolling element retaining projection projecting inward from the inner diameter side edge of the retainer in each pocket. And there is a step in the radial direction between one circumferential surface portion and the other circumferential surface portion with respect to the pocket on either the inner or outer peripheral surface, and the cage is incorporated in the axial direction with respect to the raceway ring. The shape is a shape that can be incorporated in either the forward or reverse direction, and the radial gap B between the rolling element and the rolling element holding projection when the rolling element is in a neutral position in the pocket of the cage And forming the step of the cage. A circumferential portion of the protruding side of the peripheral portions, every relationship between radial gap G between the peripheral surface of the bearing ring facing the peripheral portions, characterized in that the G <B.
According to this configuration, it is possible to manufacture a bearing ring guide type rolling bearing and a bearing ring guide type rolling bearing with a single type of cage. As a result, the types of cages can be integrated, and the number of parts management steps can be reduced.
The retainer may be integrally formed by assembling a projecting side peripheral surface part forming part forming the projecting side peripheral surface part to the retainer body.

この発明の転がり軸受は、内外の軌道輪、およびこれら内外の軌道輪の軌道面間に介在した複数の転動体を有し、これら転動体が、環状の保持器の円周方向複数箇所に設けられた各ポケットに保持された転がり軸受において、前記保持器は、前記各ポケット内の保持器内径側縁にポケット内側へ突出した転動体保持突部を有し、かつ内外いずれかの周面におけるポケットに対する軸方向の一方の周面部分と他方の周面部分とに径方向の段差があり、前記保持器は、軌道輪に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状であり、前記転動体が保持器のポケット内の中立位置にあるときの前記転動体と前記転動体保持突部との間の径方向隙間Ｂと、前記保持器の前記段差を成す周面部分のうちの突出側の周面部分と、この周面部分に対向する軌道輪の周面との径方向隙間Ｇとの関係につき、Ｇ＜Ｂとする。これにより、前記保持器を内外の軌道輪に対して正方向に組み込んだ状態では、保持器の前記突出側の周面部分が、これに対向する軌道輪の周面に接するが、前記転動体が前記転動体保持突部に接触することのない軌道輪案内の保持器案内形式となり、前記保持器を内外の軌道輪に対して逆方向に組み込んだ状態では、前記転動体が前記転動体保持突部に接触するが、保持器の前記突出側の周面部分が、これに対向する軌道輪の周面に接することのない転動体案内の保持器案内形式となる。このため、保持器の品種を統合し、部品管理工数を削減することができる。
この発明の保持器は、前記各ポケット内の保持器内径側縁にポケット内側へ突出した転動体保持突部を有し、かつ内外いずれかの周面におけるポケットに対する軸方向の一方の周面部分と他方の周面部分とに径方向の段差があり、前記保持器は、軌道輪に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状であり、前記転動体が保持器のポケット内の中立位置にあるときの前記転動体と前記転動体保持突部との間の径方向隙間Ｂと、前記保持器の前記段差を成す周面部分のうちの突出側の周面部分と、この周面部分に対向する軌道輪の周面との径方向隙間Ｇとの関係につき、Ｇ＜Ｂとしたため、品種を統合し、部品管理工数を削減することができる。 The rolling bearing according to the present invention includes inner and outer races and a plurality of rolling elements interposed between raceways of the inner and outer races, and the rolling elements are provided at a plurality of locations in the circumferential direction of the annular cage. In the rolling bearing held in each of the pockets, the cage has a rolling element holding projection that protrudes inward from the inner diameter side edge of the cage in each pocket, and on either the inner or outer peripheral surface. There is a radial step between one axial surface portion and the other peripheral surface portion with respect to the pocket, and the cage can be mounted in either the forward or reverse direction of the axial direction of the bearing ring. A radial gap B between the rolling element and the rolling element holding projection when the rolling element is in a neutral position in the pocket of the cage, and a circumference forming the step of the cage. A peripheral surface portion on the protruding side of the surface portion; Of every relationship between radial gap G between the peripheral surface of the opposing bearing ring on the peripheral surface portion, and G <B. As a result, in the state where the cage is incorporated in the positive direction with respect to the inner and outer races, the peripheral surface portion on the protruding side of the cage is in contact with the circumferential surface of the raceway facing this, but the rolling element Becomes a cage guide type of a bearing ring guide that does not contact the rolling element holding projection, and when the cage is assembled in the opposite direction with respect to the inner and outer race rings, the rolling element is held by the rolling element Although it comes into contact with the protrusion, the peripheral surface portion on the protruding side of the cage does not come into contact with the peripheral surface of the bearing ring facing this, and the cage guide type of rolling element guide is formed. For this reason, the types of cages can be integrated, and the number of parts management man-hours can be reduced.
The cage according to the present invention has a rolling element holding projection that protrudes toward the inside of the pocket on the inner diameter side edge of the cage in each pocket, and one circumferential surface portion in the axial direction with respect to the pocket on either the inner or outer circumferential surface And the other peripheral surface portion have a step in the radial direction, and the retainer has a shape that can be assembled in either the forward or reverse direction in the axial direction with respect to the raceway, and is held by the rolling element A radial clearance B between the rolling element and the rolling element holding projection when in the neutral position in the pocket of the cage, and a circumferential surface on the protruding side of the circumferential surface portion forming the step of the cage Since the relationship between the portion and the radial gap G between the peripheral surface of the bearing ring facing the peripheral surface portion is G <B, the types can be integrated and the number of parts management man-hours can be reduced.

（Ａ）は、この発明の一実施形態に係る転がり軸受の断面図、（Ｂ）は同転がり軸受の保持器を逆方向に組み込んだ状態の転がり軸受の断面図である。(A) is sectional drawing of the rolling bearing which concerns on one Embodiment of this invention, (B) is sectional drawing of the rolling bearing of the state which integrated the cage | basket of the rolling bearing in the reverse direction. 図１（Ａ）の要部の拡大断面図である。It is an expanded sectional view of the principal part of Drawing 1 (A). 図１（Ｂ）の要部の拡大断面図である。It is an expanded sectional view of the principal part of Drawing 1 (B). （Ａ）は、この発明の他の実施形態に係る転がり軸受の断面図、（Ｂ）は同転がり軸受の保持器を逆方向に組み込んだ状態の転がり軸受の断面図である。(A) is sectional drawing of the rolling bearing which concerns on other embodiment of this invention, (B) is sectional drawing of the rolling bearing of the state which integrated the cage | basket of the rolling bearing in the reverse direction. （Ａ）は、この発明のさらに他の実施形態に係る転がり軸受の保持器の突出側の周面部分を、保持器本体に組付ける前の断面図、（Ｂ）は、同保持器本体に突出側の周面部分を組付けた状態の断面図である。(A) is sectional drawing before assembling the peripheral surface part of the protrusion side of the cage | basket of the rolling bearing which concerns on further another embodiment of this invention to a cage body, (B) is the cage body. It is sectional drawing of the state which assembled | attached the surrounding surface part of the protrusion side. 従来例の転がり軸受の断面図である。It is sectional drawing of the rolling bearing of a prior art example. 他の従来例の転がり軸受の断面図である。It is sectional drawing of the rolling bearing of another prior art example.

この発明の一実施形態を図１ないし図３と共に説明する。
この実施形態にかかる転がり軸受は、内外の軌道輪１，２つまり内外輪１，２と、複数の転動体３と、環状の保持器４とを有する。内外輪１，２の軌道面１ａ，２ａ間に前記複数の転動体３が介在する。前記環状の保持器４の円周方向複数箇所にポケットＰｔが設けられ、各ポケットＰｔに転動体３が保持されている。この転がり軸受はアンギュラ玉軸受とされ、転動体３は鋼球等のボールからなる。但し、ボールは鋼球に限定されるものではなく例えばセラミックスからなるものであっても良い。 An embodiment of the present invention will be described with reference to FIGS.
The rolling bearing according to this embodiment includes inner and outer race rings 1 and 2, that is, inner and outer rings 1 and 2, a plurality of rolling elements 3, and an annular cage 4. The plurality of rolling elements 3 are interposed between the raceway surfaces 1 a and 2 a of the inner and outer rings 1 and 2. Pockets Pt are provided at a plurality of locations in the circumferential direction of the annular cage 4, and the rolling elements 3 are held in the pockets Pt. This rolling bearing is an angular ball bearing, and the rolling element 3 is made of a ball such as a steel ball. However, the balls are not limited to steel balls, and may be made of ceramics, for example.

外輪２の正面側内周面２ｓに、カウンタボアとなるテーパ面が形成されている。外輪２の正面側の端面２ｂに、前記テーパ面を介して外輪軌道面２ａが繋がる。前記テーパ面は、外輪端面２ｂ側から外輪軌道面２ａ側に向かうに従って径方向内方に傾斜する。外輪軌道面２ａと、外輪２の背面側の端面２ｃとの間に、後述する保持器４に案内される背面側内周面２ｈが形成されている。なお、内外の軌道輪１，２における「正面」とは、アキシアル荷重を支持しない側面（端面ともいう）を表す。内外の軌道輪１，２における「背面」とはアキシアル荷重を支持する側面を表す。
内輪１の背面側内周面１ｈ、つまり外輪２のテーパ面に対向する周面は、この内輪１の正面側内周面１ｓよりも径方向外方に所定寸法大径に形成されている。 A tapered surface serving as a counterbore is formed on the front-side inner peripheral surface 2 s of the outer ring 2. The outer ring raceway surface 2a is connected to the front end face 2b of the outer ring 2 through the tapered surface. The tapered surface is inclined radially inward from the outer ring end surface 2b side toward the outer ring raceway surface 2a side. Between the outer ring raceway surface 2a and the end surface 2c on the back side of the outer ring 2, a back side inner peripheral surface 2h guided by a cage 4 described later is formed. The “front” in the inner and outer races 1 and 2 represents a side surface (also referred to as an end surface) that does not support the axial load. The “rear surface” in the inner and outer races 1 and 2 represents a side surface that supports the axial load.
The inner peripheral surface 1h on the back side of the inner ring 1, that is, the peripheral surface facing the tapered surface of the outer ring 2, is formed to have a large diameter with a predetermined dimension radially outward from the front inner peripheral surface 1s of the inner ring 1.

前記保持器４は、各ポケットＰｔ内の保持器内径側縁にポケットＰｔ内側へ突出した転動体保持突部４ａを有する。さらにこの保持器４は、内外輪１，２に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状であり、合成樹脂から成る。この合成樹脂としては、熱硬化性樹脂の一つであるフェノール樹脂等を用いることができる。前記フェノール樹脂に例えば強化材や充填材を配合したものを適用しても良い。このようなフェノール樹脂からなる保持器を採用することで、機械的性質、耐熱・耐寒性、寸法安定性に優れた保持器を得ることが可能となる。
前記転動体保持突部４ａは、保持器ピッチ円直径ＰＣＤよりも内径側の部分から径方向内方に向かうに従ってポケット内側に傾斜する傾斜角度を有する傾斜面４ａａを成す。この保持器４のポケットＰｔ内の中立位置において、転動体３と前記転動体保持突部４ａとの径方向隙間Ｂを有する。 The cage 4 has rolling element holding projections 4a projecting inward from the pocket Pt at the inner diameter side edge of the cage in each pocket Pt. Further, the retainer 4 has a shape that can be incorporated in both the forward and reverse directions in the axial direction with respect to the inner and outer rings 1 and 2 and is made of a synthetic resin. As this synthetic resin, a phenol resin which is one of thermosetting resins can be used. You may apply what mixed the reinforcing material and the filler with the said phenol resin, for example. By employing such a cage made of a phenol resin, it is possible to obtain a cage excellent in mechanical properties, heat resistance / cold resistance, and dimensional stability.
The rolling element holding projection 4a forms an inclined surface 4aa having an inclination angle that inclines inward from the portion of the inner diameter side of the cage pitch circle diameter PCD toward the inside in the radial direction. At the neutral position in the pocket Pt of the cage 4, there is a radial gap B between the rolling element 3 and the rolling element holding projection 4 a.

すなわち保持器４は、図３に示すように、このポケットＰｔ内の中立位置では、転動体保持突部４ａの内径側縁部分４ａｂと、この内径側縁部分４ａｂから軸受軸方向に垂直な方向に延びる線が転動体３と交差する位置との間に、径方向隙間Ｂを有する。図１（Ｂ）および図３に示す保持器４の組み込み状態では、前記保持器４のポケットＰｔ内において、内外輪１，２に対して保持器４を径方向外方に径方向隙間Ｂ分変位させると、転動体保持突部４ａの内径側縁部分４ａｂと転動体３とが接触するが、この径方向隙間Ｂ分、保持器４を変位させたとき、保持器外周面４ｂは外輪内周面２ｈ，２ｓとは接触しない。このとき保持器４の前記ポケットの１８０°反対側においては、保持器内周面４ｃは内輪外周面１ｓ，１ｈとは接触しない。   That is, as shown in FIG. 3, the cage 4 has an inner diameter side edge portion 4ab of the rolling element holding projection 4a and a direction perpendicular to the bearing axial direction from the inner diameter side edge portion 4ab at the neutral position in the pocket Pt. A radial gap B is provided between the line extending to the position intersecting the rolling element 3. In the assembled state of the cage 4 shown in FIGS. 1 (B) and 3, the cage 4 is radially outwardly spaced from the inner and outer rings 1 and 2 in the pocket Pt of the cage 4 by a radial gap B. When displaced, the inner diameter side edge portion 4ab of the rolling element holding projection 4a and the rolling element 3 come into contact with each other, but when the cage 4 is displaced by this radial gap B, the outer circumferential surface 4b of the cage is within the outer ring It does not contact with the peripheral surfaces 2h and 2s. At this time, the cage inner peripheral surface 4c does not contact the inner ring outer peripheral surfaces 1s and 1h on the opposite side of the pocket of the cage 4 by 180 °.

この保持器４の外周面４ｂにおけるポケットＰｔに対する軸方向一方の周面部分４ｂａと、軸方向他方の周面部分４ｂｂとに、径方向の段差４ｂｃを形成している。換言すれば、保持器外周面４ｂは、径方向外方へ突出する突出側の周面部分４ｂａと、この周面部分４ｂａに段差部分４ｂｃを介して繋がる周面部分４ｂｂとを有する。この例では、突出側の周面部分４ｂａの幅寸法Ｈ１は、周面部分４ｂｂの幅寸法Ｈ２よりも幅狭に形成されている。段差部分４ｂｃは、周面部分４ｂａ側から周面部分４ｂｂ側に向かうに従って小径となる傾斜面を成す。   A step 4bc in the radial direction is formed on one peripheral surface portion 4ba in the axial direction with respect to the pocket Pt and the other peripheral surface portion 4bb in the axial direction on the outer peripheral surface 4b of the cage 4. In other words, the outer peripheral surface 4b of the cage has a protruding peripheral surface portion 4ba protruding outward in the radial direction and a peripheral surface portion 4bb connected to the peripheral surface portion 4ba via the stepped portion 4bc. In this example, the width dimension H1 of the peripheral surface portion 4ba on the protruding side is formed narrower than the width dimension H2 of the peripheral surface portion 4bb. The step portion 4bc forms an inclined surface having a smaller diameter as it goes from the peripheral surface portion 4ba side to the peripheral surface portion 4bb side.

前記転動体３が保持器４のポケットＰｔ内の中立位置にあるとき、前述の径方向隙間Ｂと、前記突出側の周面部分４ｂａとこの周面部分４ｂａに対向する外輪２の内周面２ｈとの径方向隙間Ｇとの関係につき、Ｇ＜Ｂとしている。
図１（Ａ）および図２に示すように、保持器４を内外輪１，２に対して正方向に組み込んだ状態では、保持器４の突出側の周面部分４ｂａがこれに対向する外輪２の内周面２ｈに接するが、転動体３が転動体保持突部４ａに接触することのない軌道輪案内つまり外輪案内の保持器形式となる。
図１（Ｂ）および図３に示すように、保持器４を内外輪１，２に対して逆方向に組み込んだ状態では、転動体３が前記転動体保持突部４ａに接触するが、保持器４の突出側の周面部分４ｂａが、これに対向する外輪２の内周面２ｓに接することのない転動体案内の保持器案内形式となる。 When the rolling element 3 is in a neutral position in the pocket Pt of the cage 4, the aforementioned radial gap B, the protruding peripheral surface portion 4ba, and the inner peripheral surface of the outer ring 2 facing the peripheral surface portion 4ba. G <B with respect to the relationship between the radial gap G and 2h.
As shown in FIG. 1A and FIG. 2, in a state where the cage 4 is assembled in the positive direction with respect to the inner and outer rings 1 and 2, the outer circumferential surface portion 4ba on the protruding side of the cage 4 faces the outer ring. 2 is in contact with the inner peripheral surface 2h, but the rolling element 3 does not come into contact with the rolling element holding projection 4a, that is, a bearing ring guide, that is, an outer ring guide retainer type.
As shown in FIG. 1 (B) and FIG. 3, in a state where the cage 4 is assembled in the opposite direction with respect to the inner and outer rings 1 and 2, the rolling element 3 comes into contact with the rolling element holding projection 4a. The peripheral surface portion 4ba on the protruding side of the cage 4 is a rolling element guide cage guide type that does not come into contact with the inner peripheral surface 2s of the outer ring 2 facing this.

図１（Ａ）および図２に示す保持器４の組み込み状態では、前記保持器４のポケットＰｔ内において、内外輪１，２に対して保持器４を径方向外方に径方向隙間Ｇ分変位させると、保持器外周面４ｂと外輪内周面２ｈとが接触するが、転動体３と転動体保持突部４ａとの径方向隙間Ｂは完全には無くならない。すなわち図１（Ａ）および図２に示す保持器４の組み込み状態では、本保持器４は外輪案内保持器として機能する。
これに対して保持器４の組み込み方向を図１（Ａ）および図２とは逆方向とした図１（Ｂ）および図３に示す保持器４の組み込み状態では、保持器外周面４ｂは外輪内周面２ｓと接触することなく、本保持器４は転動体案内保持器として機能する。 In the assembled state of the cage 4 shown in FIGS. 1A and 2, the cage 4 is radially outwardly spaced from the inner and outer rings 1 and 2 in the pocket Pt of the cage 4 by the radial gap G. When displaced, the outer peripheral surface 4b of the cage and the inner peripheral surface 2h of the outer ring come into contact with each other, but the radial gap B between the rolling element 3 and the rolling element holding projection 4a is not completely eliminated. That is, in the assembled state of the retainer 4 shown in FIGS. 1A and 2, the retainer 4 functions as an outer ring guide retainer.
On the other hand, in the assembled state of the cage 4 shown in FIGS. 1B and 3 in which the cage 4 is assembled in the direction opposite to that in FIGS. 1A and 2, the cage outer peripheral surface 4 b is the outer ring. The holder 4 functions as a rolling element guide holder without contacting the inner peripheral surface 2s.

以上説明した転がり軸受によると、転動体３が保持器４のポケットＰｔ内で中立位置にあるときの前記転動体３と転動体保持突部４ａとの間の径方向隙間Ｂと、保持器４の突出側の周面部分４ｂａとこの周面部分４ｂａに対向する外輪２の内周面２ｈとの径方向隙間Ｇとの関係をＧ＜Ｂとしたため、保持器４を内外輪１，２に対して正方向に組み込んだ状態では、保持器４の突出側の周面部分４ｂａが、これに対向する外輪２の内周面２ｈに接するが、転動体３が転動体保持突部４ａに接触することがない外輪案内形式となり、保持器４を内外輪１，２に対して逆方向に組み込んだ状態では、転動体３が転動体保持突部４ａに接触するが、保持器４の突出側の周面部分４ｂａがこれに対向する外輪２の内周面２ｓに接することのない転動体案内形式となる。
すなわち、一種類の保持器４で、外輪案内形式の転がり軸受と、転動体案内形式の転がり軸受を製造することができる。これにより、保持器の品種を統合し、部品管理工数を削減することができる。保持器４の組み込み方向を正逆に変えることで、内外輪１，２に対する保持器４の案内形式を外輪案内形式と、転動体案内形式とに変えることができる。例えば、工作機械主軸等にこの転がり軸受を適用する場合において、高速領域まで使用する場合は外輪案内の保持器案内形式とし、中低速領域で使用する場合は保持器案内形式とする。また、外輪案内の保持器案内形式でグリース潤滑するときに保持器音が発生する場合には、転動体案内の保持器案内形式とすることで、前記保持器音の発生を解消することが可能となる。 According to the rolling bearing described above, the radial gap B between the rolling element 3 and the rolling element holding projection 4a when the rolling element 3 is in the neutral position in the pocket Pt of the cage 4, and the cage 4 Since the relationship between the circumferential surface portion 4ba on the projecting side and the radial gap G between the inner circumferential surface 2h of the outer ring 2 facing the circumferential surface portion 4ba is G <B, the retainer 4 is connected to the inner and outer rings 1 and 2. In the state of being assembled in the positive direction, the peripheral surface portion 4ba on the protruding side of the cage 4 is in contact with the inner peripheral surface 2h of the outer ring 2 facing this, but the rolling element 3 is in contact with the rolling element holding projection 4a. In the state where the outer ring guide type is not performed and the cage 4 is assembled in the opposite direction with respect to the inner and outer rings 1 and 2, the rolling element 3 comes into contact with the rolling element holding projection 4 a, but the protruding side of the cage 4 Rolling body plan in which the peripheral surface portion 4ba of the outer ring 2 does not come into contact with the inner peripheral surface 2s of the outer ring 2 facing the same The format.
That is, it is possible to manufacture an outer ring guide type rolling bearing and a rolling element guide type rolling bearing with a single type of cage 4. As a result, the types of cages can be integrated, and the number of parts management steps can be reduced. By changing the assembling direction of the cage 4 in the forward and reverse directions, the guide format of the cage 4 with respect to the inner and outer rings 1 and 2 can be changed between an outer ring guide format and a rolling element guide format. For example, when this rolling bearing is applied to a machine tool main shaft or the like, the cage guide type of the outer ring guide is used when used up to the high speed region, and the cage guide type is used when used in the medium / low speed region. In addition, when grease is lubricated with the outer ring guide cage guide type, it is possible to eliminate the cage noise generation by adopting a rolling element guide cage guide type. It becomes.

このように保持器４の組み込み方向を変えることによって、外輪案内の軸受と転動体案内の軸受とを一種類の保持器で製造可能となる。従来、使用条件により、転動体案内方式の保持器、軌道輪案内方式の保持器と二種類の保持器が必要であったのに対し、本実施形態の構成では一種類の保持器４で、二つの案内方式の機能を満足することが可能となり兼用できることになる。したがって、保持器の品種を統合し、部品管理工数を削減することができる。それ故、転がり軸受の製造コストの低減を図ることができる。   Thus, by changing the direction in which the cage 4 is assembled, the outer ring guide bearing and the rolling element guide bearing can be manufactured with a single type of cage. Conventionally, rolling element guide type cages, raceway guide type cages and two types of cages were required depending on the use conditions, whereas in the configuration of this embodiment, one type of cage 4 It is possible to satisfy the functions of the two guidance methods and to use them both. Therefore, it is possible to integrate the cage types and reduce the number of parts management man-hours. Therefore, the manufacturing cost of the rolling bearing can be reduced.

保持器４が合成樹脂からなるため、金型により保持器４の量産化を図れ、例えば金属を切削加工してなる同形状の保持器よりも、保持器１個あたりの製造コストの低減を図ることが可能となる。合成樹脂のうちフェノール樹脂を採用することで、機械的性質、耐熱・耐寒性、寸法安定性に優れた保持器を得ることが可能となる。なお、保持器材料として、フェノール樹脂以外の合成樹脂を採用しても良い。
保持器４の突出側の周面部分４ｂａの幅寸法Ｈ１は、周面部分４ｂｂの幅寸法Ｈ２よりも幅狭に形成されているため、保持器全体として薄肉化を図り、材料費を低減することができる。
保持器４の転動体保持突部４ａは、径方向内方に向かうに従ってポケットＰｔ内側に傾斜する傾斜角度を有する複雑でない形状のため、金型による成形を容易に行うことが可能となる。また、金型成形後の成形品を金型から容易に取り出すことができる。 Since the cage 4 is made of a synthetic resin, the cage 4 can be mass-produced by a mold, and the manufacturing cost per cage is reduced compared to a cage having the same shape formed by cutting metal, for example. It becomes possible. By adopting a phenol resin among the synthetic resins, it becomes possible to obtain a cage excellent in mechanical properties, heat resistance / cold resistance, and dimensional stability. In addition, you may employ | adopt synthetic resins other than a phenol resin as a cage material.
Since the width dimension H1 of the peripheral surface portion 4ba on the protruding side of the cage 4 is formed narrower than the width dimension H2 of the peripheral surface portion 4bb, the overall thickness of the cage is reduced and the material cost is reduced. be able to.
Since the rolling element holding protrusion 4a of the cage 4 has an uncomplicated shape having an inclination angle inclined inward of the pocket Pt as it goes inward in the radial direction, it can be easily formed by a mold. Moreover, the molded product after metal mold | die shaping | molding can be taken out from a metal mold | die easily.

以下、この発明の他の実施形態について説明する。以下の説明においては、各形態で先行する形態で説明している事項に対応している部分には同一の参照符を付し、重複する説明を略する場合がある。構成の一部のみを説明している場合、構成の他の部分は、先行して説明している形態と同様とする。実施の各形態で具体的に説明している部分の組合せばかりではなく、特に組合せに支障が生じなければ、実施の形態同士を部分的に組合せることも可能である。   Hereinafter, other embodiments of the present invention will be described. In the following description, the same reference numerals are given to portions corresponding to the matters described in the preceding forms in each embodiment, and overlapping description may be omitted. When only a part of the configuration is described, the other parts of the configuration are the same as those described in the preceding section. Not only the combination of the parts specifically described in each embodiment, but also the embodiments can be partially combined as long as the combination does not hinder.

図４の転がり軸受は、前述の保持器４に代えて、保持器４Ａを内輪案内の保持器案内形式とし、転動体案内の保持器案内形式にもすることができる形状としている。つまり、この保持器４Ａも、内外輪１，２に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状である。さらに保持器内周面４ｃは、径方向内方へ突出する突出側の周面部分４Ａａと、この周面部分４Ａａに段差部分４Ａｂを介して繋がる周面部分４Ａｃとを有する。前記段差部分４Ａｂは、周面部分４Ａａに対して垂直に立ち上がり周面部分４Ａｃに繋がる。また保持器４Ａにおいて、この段差部分４Ａｂは、転動体保持突部４ａの内径側縁部分４ａｂ（図３参照）に連続して繋がる軸方向位置に、円周方向にわたって設けられる。   The rolling bearing shown in FIG. 4 has a shape that can replace the cage 4 described above with the cage 4A as an inner ring guide cage guide type and a rolling element guide cage guide type. That is, this cage 4A is also of a shape that can be assembled to the inner and outer rings 1 and 2 in both the forward and reverse directions. Furthermore, the cage inner peripheral surface 4c has a protruding peripheral surface portion 4Aa protruding radially inward, and a peripheral surface portion 4Ac connected to the peripheral surface portion 4Aa via a stepped portion 4Ab. The step portion 4Ab rises perpendicularly to the peripheral surface portion 4Aa and is connected to the peripheral surface portion 4Ac. In the retainer 4A, the stepped portion 4Ab is provided in the circumferential direction at an axial position continuously connected to the inner diameter side edge portion 4ab (see FIG. 3) of the rolling element holding projection 4a.

図４（Ａ）に示すように、保持器４Ａを内外輪１，２に対して正方向に組み込んだ状態では、保持器４Ａの突出側の周面部分４Ａａがこれに対向する内輪１の外周面１ｈに接するが、転動体３が転動体保持突部４ａに接触することのない内輪案内の保持器形式となる。図４（Ｂ）に示すように、保持器４Ａを逆方向に組み込んだ状態では、転動体３が前記転動体保持突部４ａに接触するが、保持器４Ａの突出側の周面部分４Ａａがこれに対向する内輪１の外周面１ｓに接することのない転動体案内の保持器案内形式となる。
このように保持器４Ａの組み込み方向を変えることによって、内輪案内と転動体案内の使い分けが一種類の保持器で可能となる。 As shown in FIG. 4 (A), in a state in which the cage 4A is assembled in the forward direction with respect to the inner and outer rings 1 and 2, the outer circumferential surface portion 4Aa on the protruding side of the cage 4A is opposed to the outer circumference of the inner ring 1 Although it is in contact with the surface 1h, the rolling element 3 does not come into contact with the rolling element holding projection 4a, and the inner ring guide retainer type is adopted. As shown in FIG. 4B, in a state where the cage 4A is assembled in the reverse direction, the rolling element 3 comes into contact with the rolling element holding projection 4a, but the peripheral surface portion 4Aa on the protruding side of the cage 4A is It becomes a cage guide type of rolling element guide that does not contact the outer peripheral surface 1s of the inner ring 1 facing this.
In this way, by changing the assembling direction of the cage 4A, the inner ring guide and the rolling element guide can be selectively used with one type of cage.

図５の転がり軸受における保持器４Ｂは、突出側の周面部分４ｓを形成する突出側周面部分形成部品４ｓＭを、同図５（Ａ）に示すように保持器本体４Ｂａに接着または圧入等により組付けることで、図５（Ｂ）に示すように一体に形成したものである。前記保持器本体４Ｂａは、保持器４Ｂのうち突出側周面部分形成部品４ｓＭを除いた構成部品であって、転動体３を保持するポケットＰｔおよび転動体保持突部４ａを成す構成部品である。保持器本体４Ｂａの軸方向一方の内周面部分ｄ１に、突出側周面部分形成部品４ｓＭの外周面部分ｄ３が接着または圧入されて固定されている。
前記保持器本体４Ｂａは、図５（Ａ）に示すように、軸方向一方および他方の両側の内周面部分ｄ１、ｄ２が同一径であり、さらに両側の外周面部分も同一径に設けられている。よって、保持器本体４Ｂａは軸方向一方および他方に対称な形状となる。 In the cage 4B in the rolling bearing of FIG. 5, the protruding side peripheral surface part forming component 4sM forming the protruding side peripheral surface part 4s is bonded or press-fitted to the cage main body 4Ba as shown in FIG. As shown in FIG. 5B, they are integrally formed. The cage body 4Ba is a component part of the cage 4B excluding the protruding peripheral surface part forming component 4sM, and is a component part that forms the pocket Pt that holds the rolling element 3 and the rolling element holding projection 4a. . The outer peripheral surface portion d3 of the protruding peripheral surface portion forming component 4sM is fixed to the inner peripheral surface portion d1 in the axial direction of the cage body 4Ba by bonding or press-fitting.
As shown in FIG. 5A, the retainer body 4Ba has inner diameter portions d1 and d2 on both sides in the axial direction and the same diameter, and outer diameter portions on both sides are also provided with the same diameter. ing. Therefore, the cage body 4Ba has a symmetrical shape with respect to one and the other in the axial direction.

この場合、一種類の保持器４で、軌道輪案内形式の転がり軸受と、転動体案内形式の転がり軸受を製造することができるうえ、保持器４Ｂの周面部分４ｓと、この周面部分４ｓに対向する軌道輪の周面との径方向隙間Ｇを容易に設計変更することができる。また、共通の保持器本体４Ｂａに対し、外輪案内の保持器案内形式となる突出側周面部分形成部品４ｓＭを組み付けても良いし、内輪案内の保持器案内形式となる突出側周面部分形成部品４ｓＭを組み付けても良い（図５の例は内輪案内形式）。この場合、保持器本体４Ｂａの部品の兼用性を高めることができる。
前記保持器本体４Ｂａの両側の内周面部分ｄ１、ｄ２が同一径であるため、図５（Ｂ）の形態から、保持器本体４Ｂａの軸方向他方の内周面部分ｄ２に、突出側周面部分形成部品４ｓＭの外周面部分ｄ３を圧入等により固定した形態に変更することも可能である。また、この保持器４Ｂから突出側周面部分形成部品４ｓＭを除いた保持器本体４Ｂａのみを用いて転動体案内形式の保持器とすることも可能となる。よって、部品管理工数の削減をさらに図ることが可能となる。 In this case, it is possible to manufacture a bearing ring type rolling bearing and a rolling element guide type rolling bearing with a single type of cage 4, and the peripheral surface portion 4 s of the cage 4 B and the peripheral surface portion 4 s. It is possible to easily change the design of the radial gap G with respect to the circumferential surface of the raceway facing the. Further, a protruding side circumferential surface part forming part 4sM that becomes a cage guide type for the outer ring guide may be assembled to a common cage body 4Ba, or a protruding side circumferential surface part that becomes a cage guide type for the inner ring guide is formed. The component 4sM may be assembled (the example of FIG. 5 is an inner ring guide type). In this case, the combined use of the parts of the cage body 4Ba can be improved.
Since the inner peripheral surface portions d1 and d2 on both sides of the cage body 4Ba have the same diameter, from the form of FIG. It is also possible to change to a form in which the outer peripheral surface portion d3 of the surface portion forming component 4sM is fixed by press fitting or the like. It is also possible to use a rolling element guide type cage by using only the cage body 4Ba excluding the protruding side circumferential surface part forming component 4sM from the cage 4B. Therefore, it is possible to further reduce the number of parts management man-hours.

前記保持器が金属からなるものであっても良い。この場合、保持器の剛性を高め、軸受の高回転化を図れる。
転がり軸受は、前記いずれかの保持器を組み込んだ単列のアンギュラ玉軸受としているが、複列のアンギュラ玉軸受としても良い。この発明の転がり軸受として、深溝玉軸受や４点接触玉軸受を適用することも可能である。 The cage may be made of metal. In this case, it is possible to increase the rigidity of the cage and increase the rotation speed of the bearing.
The rolling bearing is a single-row angular contact ball bearing incorporating any one of the above cages, but may be a double-row angular contact ball bearing. As the rolling bearing of this invention, a deep groove ball bearing or a four-point contact ball bearing can be applied.

１…内輪
２…外輪
１ａ，２ａ…軌道面
３…転動体
４，４Ａ，４Ｂ…保持器
４ｂａ，４Ａａ…周面部分
４ａ…転動体保持突部
４ｓＭ…突出側周面部分形成部品
Ｐｔ…ポケット
DESCRIPTION OF SYMBOLS 1 ... Inner ring 2 ... Outer ring 1a, 2a ... Raceway surface 3 ... Rolling bodies 4, 4A, 4B ... Cage 4ba, 4Aa ... Circumferential surface part 4a ... Rolling body holding projection 4sM ... Projection side circumferential surface part formation part Pt ... Pocket

Claims (10)

内外の軌道輪、およびこれら内外の軌道輪の軌道面間に介在した複数の転動体を有し、これら転動体が、環状の保持器の円周方向複数箇所に設けられた各ポケットに保持された転がり軸受において、
前記保持器は、前記各ポケット内の保持器内径側縁にポケット内側へ突出した転動体保持突部を有し、かつ内外いずれかの周面におけるポケットに対する軸方向の一方の周面部分と他方の周面部分とに径方向の段差があり、
前記保持器は、軌道輪に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状であり、
前記転動体が保持器のポケット内の中立位置にあるときの前記転動体と前記転動体保持突部との間の径方向隙間Ｂと、前記保持器の前記段差を成す周面部分のうちの突出側の周面部分と、この周面部分に対向する軌道輪の周面との径方向隙間Ｇとの関係につき、Ｇ＜Ｂとしたことを特徴とする転がり軸受。 It has inner and outer race rings and a plurality of rolling elements interposed between the raceway surfaces of these inner and outer race rings, and these rolling elements are held in pockets provided at a plurality of locations in the circumferential direction of the annular cage. In rolling bearings,
The retainer has a rolling element retaining protrusion projecting inward from the inner diameter side edge of the retainer in each pocket, and one peripheral surface portion in the axial direction with respect to the pocket on either the inner or outer peripheral surface and the other There is a step in the radial direction with the peripheral surface part of
The cage has a shape that can be incorporated in either the forward or reverse direction of the axial direction of the bearing ring.
A radial gap B between the rolling element and the rolling element holding projection when the rolling element is in a neutral position in the pocket of the cage, and a peripheral surface portion forming the step of the cage A rolling bearing characterized in that G <B with respect to the relationship between the circumferential surface portion on the protruding side and the radial gap G between the circumferential surface of the bearing ring facing the circumferential surface portion. 請求項１において、前記保持器の前記突出側の周面部分が接する軌道輪が、外輪であって、前記保持器を前記正方向に組み込んだ状態では外輪案内の保持器案内形式となる転がり軸受。   The rolling bearing according to claim 1, wherein the bearing ring that is in contact with the protruding peripheral surface portion of the cage is an outer ring, and in the state in which the cage is incorporated in the forward direction, the rolling bearing has a cage guide type for outer ring guidance. . 請求項１において、前記保持器の前記突出側の周面部分が接する軌道輪が、内輪であって、前記保持器を前記正方向に組み込んだ状態では内輪案内の保持器案内形式となる転がり軸受。   The rolling bearing according to claim 1, wherein the bearing ring in contact with the protruding peripheral surface portion of the cage is an inner ring, and in the state where the cage is incorporated in the forward direction, the rolling bearing is a cage guide type of an inner ring guide. . 請求項１ないし請求項３のいずれか１項において、前記転動体を玉とした、玉軸受である転がり軸受。   The rolling bearing according to any one of claims 1 to 3, wherein the rolling element is a ball bearing. 請求項１ないし請求項４のいずれか１項において、アンギュラ玉軸受であって、前記保持器の突出側の周面部分は、前記正方向に組み込んだ状態では、軌道輪の背面側の周面部分に接する転がり軸受。   5. The angular contact ball bearing according to claim 1, wherein the peripheral surface portion on the protruding side of the cage is a peripheral surface on the back surface side of the raceway in a state of being incorporated in the positive direction. Rolling bearing in contact with the part. 請求項１ないし請求項５のいずれか１項において、前記保持器が合成樹脂からなる転がり軸受。   The rolling bearing according to claim 1, wherein the cage is made of a synthetic resin. 請求項１ないし請求項５のいずれか１項において、前記保持器が金属からなる転がり軸受。   The rolling bearing according to claim 1, wherein the cage is made of metal. 請求項１ないし請求項５のいずれか１項において、前記保持器は、前記突出側の周面部分を形成する突出側周面部分形成部品を、保持器本体に組付けることで一体に形成したものである転がり軸受。   6. The cage according to claim 1, wherein the retainer is integrally formed by assembling a projecting side peripheral surface part forming part that forms the projecting side peripheral surface part to the retainer body. Rolling bearings that are things. 内外の軌道輪、およびこれら内外の軌道輪の軌道面間に介在した複数の転動体を有し、これら転動体が、環状の保持器の円周方向複数箇所に設けられた各ポケットに保持された転がり軸受に用いられる転がり軸受用保持器において、
前記保持器は、前記各ポケット内の保持器内径側縁にポケット内側へ突出した転動体保持突部を有し、かつ内外いずれかの周面におけるポケットに対する軸方向の一方の周面部分と他方の周面部分とに径方向の段差があり、
前記保持器は、軌道輪に対して軸方向の組み込み方向が正逆いずれの方向にも組み込み可能な形状であり、
前記転動体が保持器のポケット内の中立位置にあるときの前記転動体と前記転動体保持突部との間の径方向隙間Ｂと、前記保持器の前記段差を成す周面部分のうちの突出側の周面部分と、この周面部分に対向する軌道輪の周面との径方向隙間Ｇとの関係につき、Ｇ＜Ｂとしたことを特徴とする転がり軸受用保持器。 It has inner and outer race rings and a plurality of rolling elements interposed between the raceway surfaces of these inner and outer race rings, and these rolling elements are held in pockets provided at a plurality of locations in the circumferential direction of the annular cage. In the rolling bearing cage used for the rolling bearing,
The retainer has a rolling element retaining protrusion projecting inward from the inner diameter side edge of the retainer in each pocket, and one peripheral surface portion in the axial direction with respect to the pocket on either the inner or outer peripheral surface and the other There is a step in the radial direction with the peripheral surface part of
The cage has a shape that can be incorporated in either the forward or reverse direction of the axial direction of the bearing ring.
A radial gap B between the rolling element and the rolling element holding projection when the rolling element is in a neutral position in the pocket of the cage, and a peripheral surface portion forming the step of the cage A cage for a rolling bearing, characterized in that G <B with respect to the relationship between the circumferential surface portion on the protruding side and the radial gap G between the circumferential surface of the bearing ring facing the circumferential surface portion. 請求項９において、前記保持器は、前記突出側の周面部分を形成する突出側周面部分形成部品を、保持器本体に組付けることで一体に形成したものである転がり軸受用保持器。   10. The rolling bearing retainer according to claim 9, wherein the retainer is integrally formed by assembling a projecting side peripheral surface portion forming component that forms the projecting side peripheral surface portion to the retainer body.
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016044758A (en) * 2014-08-22 2016-04-04 株式会社ジェイテクト Rolling bearing
WO2020189364A1 (en) 2019-03-18 2020-09-24 Ntn株式会社 Angular ball bearing, and retainer for angular ball bearing
US20230003252A1 (en) * 2021-06-30 2023-01-05 Aktiebolaget Skf Rolling bearing for high speeds equipped with an optimized cage to reduce noise at low speeds
KR20240004650A (en) 2021-04-27 2024-01-11 엔티엔 가부시키가이샤 Angular ball bearings

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016044758A (en) * 2014-08-22 2016-04-04 株式会社ジェイテクト Rolling bearing
WO2020189364A1 (en) 2019-03-18 2020-09-24 Ntn株式会社 Angular ball bearing, and retainer for angular ball bearing
KR20240004650A (en) 2021-04-27 2024-01-11 엔티엔 가부시키가이샤 Angular ball bearings
US20230003252A1 (en) * 2021-06-30 2023-01-05 Aktiebolaget Skf Rolling bearing for high speeds equipped with an optimized cage to reduce noise at low speeds
US11846316B2 (en) * 2021-06-30 2023-12-19 Aktiebolaget Skf Rolling bearing for high speeds equipped with an optimized cage to reduce noise at low speeds

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