JP2016070422A - Cage for rolling bearing - Google Patents

Cage for rolling bearing Download PDF

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JP2016070422A
JP2016070422A JP2014201920A JP2014201920A JP2016070422A JP 2016070422 A JP2016070422 A JP 2016070422A JP 2014201920 A JP2014201920 A JP 2014201920A JP 2014201920 A JP2014201920 A JP 2014201920A JP 2016070422 A JP2016070422 A JP 2016070422A
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cage
rolling bearing
circumferential side
centers
arcs
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JP6550711B2 (en
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健太 剱持
Kenta Kenmochi
健太 剱持
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NSK Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a cage for rolling bearing which can reduce friction generating between a rolling element and a pocket part.SOLUTION: A pocket part 20 includes a first circumferential direction side surface 11a of one column part 10, and a second circumferential direction side surface 11b of the other column part 10, out of the adjacent column parts 10. The first and second circumferential direction side surfaces 11a, 11b comprise first and second circular arcs 12a, 12b having first and second centers Oa, Ob respectively. Axial direction positions of the first and second centers Oa, Ob are identical, and circumferential direction positions are not identical.SELECTED DRAWING: Figure 2

Description

本発明は転がり軸受用保持器に関する。   The present invention relates to a cage for a rolling bearing.

転がり軸受では、多くの品種において保持器が用いられる。保持器の主な役割は、回転中の各転動体を軸受に対して等配に公転させ、軸受の剛性及び回転精度を高い状態で維持することである。   In rolling bearings, cages are used in many types. The main role of the cage is to revolve each rolling element in rotation equally with respect to the bearing and maintain the rigidity and rotational accuracy of the bearing in a high state.

保持器は一般的に、転動体、内輪、及び外輪の間に、一定の隙間を介して配置される。保持器の半径方向の動き量が、内輪又は外輪で規制される場合は、内輪案内保持器又は外輪案内保持器として分類され、転動体で規制される場合は転動体案内保持器として分類される。   In general, the cage is disposed between the rolling elements, the inner ring, and the outer ring with a certain gap therebetween. When the amount of movement in the radial direction of the cage is regulated by the inner ring or the outer ring, it is classified as an inner ring guide cage or outer ring guide cage, and when it is regulated by a rolling element, it is classified as a rolling element guide cage. .

転動体の等配を維持するため、軸受回転中、保持器と転動体との間には接触が発生する。特に、転動体案内保持器の場合は、通常、保持器の動きは転動体に依存するため、保持器と転動体の接触によって発生する摩擦は大きくなる。   In order to maintain the uniform distribution of the rolling elements, contact is generated between the cage and the rolling elements during the rotation of the bearing. In particular, in the case of a rolling element guide retainer, the movement of the retainer usually depends on the rolling element, so that the friction generated by the contact between the retainer and the rolling element increases.

転動体と保持器ポケット間で発生する摩擦は、発熱や摩耗、保持器の回転不良（暴れ）を引き起こす。発熱や摩耗は軸受の劣化（寿命低下）を引き起こし、保持器の回転不良（暴れ）は回転精度不良や異常音を発生させるため、転がり軸受において、この様な摩擦の低減は解決すべき課題の一つとなっている。   Friction generated between the rolling elements and the cage pocket causes heat generation, wear, and rotation failure (rambling) of the cage. Heat generation and wear cause deterioration of the bearing (life reduction), and rotation failure of the cage (runaway) generates poor rotation accuracy and abnormal noise. Therefore, such reduction of friction in rolling bearings is a problem to be solved. It has become one.

特許文献１には、柱部の円周方向側面が、外径側凹曲面部と内径側凹曲面とを連続させてなる、ゴシックアーチ状の複合曲面からなる保持器が開示されている。これにより、ポケット内でのころの変位に拘らず、各ころの転動面と各柱部の円周方向側面の径方向端縁部とが当接（エッジ当たり）しない事を図っている。   Patent Document 1 discloses a cage having a Gothic arch-shaped composite curved surface in which a circumferential side surface of a pillar portion is formed by connecting an outer diameter side concave curved surface portion and an inner diameter side concave curved surface. Thus, regardless of the displacement of the rollers in the pocket, the rolling surfaces of the rollers and the radial end edges of the circumferential side surfaces of the column portions do not contact (per edge).

特開２００７−２７８４０６号公報JP 2007-278406 A

しかしながら、特許文献１に記載の保持器では、柱部の円周方向側面が２つの凹円弧同士を連続させてなるため、転動体が公転した際に、当該転動体と円周方向側面との接触が二面当たりとなってしまい、摩擦が大きくなってしまう問題が生じる。   However, in the cage described in Patent Document 1, since the circumferential side surface of the column portion is formed by connecting two concave arcs, when the rolling body revolves, the rolling body and the circumferential side surface There is a problem in that the contact comes into contact with two surfaces and the friction increases.

本発明は上記事情に鑑みてなされたものであり、転動体とポケット部との間で発生する摩擦を低減可能な転がり軸受用保持器を提供することを目的とする。   This invention is made | formed in view of the said situation, and it aims at providing the cage for rolling bearings which can reduce the friction which generate | occur | produces between a rolling element and a pocket part.

本発明の上記目的は、下記の構成により達成される。
（１） 周方向に所定間隔で配置された複数の柱部と、
隣り合う前記柱部の間に形成され、それぞれ転動体を転動自在に保持するポケット部と、
を備える転がり軸受用保持器であって、
前記ポケット部は、隣り合う前記柱部のうち、一方の前記柱部の第１円周方向側面と、他方の前記柱部の第２円周方向側面と、を有し、
前記第１及び第２円周方向側面は、それぞれ、第１及び第２中心を有する第１及び第２円弧からなり、
前記第１及び第２中心は、軸方向位置が同一であり、円周方向位置が不同である、転がり軸受用保持器。
（２） 前記第１及び第２中心は、半径方向位置が同一である、（１）に記載の転がり軸受用保持器。
（３） 前記第１及び第２中心は、半径方向位置が不同である、（１）に記載の転がり軸受用保持器。
（４） 前記第１及び第２円弧は、半径が同一である、（１）〜（３）の何れか１つに記載の転がり軸受用保持器。
（５） 前記第１及び第２円弧は、半径が不同である、（１）〜（３）の何れか１つに記載の転がり軸受用保持器。
（６） 周方向に所定間隔で配置された複数の柱部と、
隣り合う前記柱部の間に形成され、それぞれ転動体を転動自在に保持するポケット部と、
を備える転がり軸受用保持器であって、
前記ポケット部は、隣り合う前記柱部のうち、一方の前記柱部の第１円周方向側面と、他方の前記柱部の第２円周方向側面と、を有し、
前記第１及び第２円周方向側面は、それぞれ、第１及び第２中心を有する第１及び第２円弧と、前記第１及び第２円弧と接続して平面形状である第１及び第２ストレート部と、からなり、
前記第１及び第２中心は、軸方向位置が同一であり、円周方向位置が不同である、転がり軸受用保持器。
（７） 前記転がり軸受用保持器は、前記複数の柱部の軸方向一端部と接続する円環部を備え、
前記ポケット部は、前記第１及び第２円周方向側面と、前記円環部の軸方向側面と、を有し、
前記円環部の軸方向側面は、平面形状である、（１）〜（６）の何れか１つに記載の転がり軸受用保持器。
（８） 前記転がり軸受用保持器は、前記複数の柱部の軸方向両端部とそれぞれ接続する第１及び第２円環部を備え、
前記ポケット部は、前記第１及び第２円周方向側面と、前記第１及び第２円環部の軸方向側面と、を有し、
前記第１及び第２円環部の軸方向側面は、平面形状である、（１）〜（６）の何れか１つに記載の転がり軸受用保持器。 The above object of the present invention can be achieved by the following constitution.
(1) a plurality of pillars arranged at predetermined intervals in the circumferential direction;
A pocket portion formed between the adjacent column portions, each holding a rolling element so as to be freely rollable;
A rolling bearing retainer comprising:
The pocket portion includes a first circumferential side surface of one of the column portions and a second circumferential side surface of the other column portion among the adjacent column portions,
The first and second circumferential side surfaces comprise first and second arcs having first and second centers, respectively.
The first and second centers are rolling bearing cages having the same axial position and the same circumferential position.
(2) The rolling bearing cage according to (1), wherein the first and second centers have the same radial position.
(3) The rolling bearing retainer according to (1), wherein the first and second centers have different radial positions.
(4) The rolling bearing retainer according to any one of (1) to (3), wherein the first and second arcs have the same radius.
(5) The rolling bearing retainer according to any one of (1) to (3), wherein the first and second arcs have radii that are the same.
(6) a plurality of pillars arranged at predetermined intervals in the circumferential direction;
A pocket portion formed between the adjacent column portions, each holding a rolling element so as to be freely rollable;
A rolling bearing retainer comprising:
The pocket portion includes a first circumferential side surface of one of the column portions and a second circumferential side surface of the other column portion among the adjacent column portions,
The first and second circumferential side surfaces respectively have first and second arcs having first and second centers, and first and second planar shapes connected to the first and second arcs. It consists of a straight part,
The first and second centers are rolling bearing cages having the same axial position and the same circumferential position.
(7) The rolling bearing retainer includes an annular portion connected to one axial end portion of the plurality of column portions,
The pocket portion includes the first and second circumferential side surfaces and the axial side surface of the annular portion,
The rolling bearing retainer according to any one of (1) to (6), wherein an axial side surface of the annular portion has a planar shape.
(8) The rolling bearing retainer includes first and second annular portions that are respectively connected to axial end portions of the plurality of column portions,
The pocket portion includes the first and second circumferential side surfaces and the axial side surface of the first and second annular portions,
The rolling bearing retainer according to any one of (1) to (6), wherein the axial side surfaces of the first and second annular portions have a planar shape.

本発明の転がり軸受用保持器によれば、ポケット部を形成する第１及び第２円周方向側面は、それぞれ、第１及び第２中心を有する第１及び第２円弧からなり、第１及び第２中心は、軸方向位置が同一であり、円周方向位置が不同である。したがって、転動体と保持器が半径方向に相対移動した場合には、保持器と転動体との接触が面当たりとなるので、転動体と柱部の円周方向側面の径方向端縁部とがエッジ当たりすることを回避できる。
また、第１及び第２円周方向側面がそれぞれ単一の円弧である第１及び第２円弧からなるので、転動体と保持器とが円周方向に相対移動した場合には、転動体と保持器とを一点で接触させることができる。
このように、接触面積が減少するので、転動体と保持器との間で発生する摺動摩擦を低減することが可能である。したがって、本発明の転がり軸受用保持器は、転動体と保持器との接触摩擦が大きい転動体案内形式の保持器に好適である。 According to the rolling bearing retainer of the present invention, the first and second circumferential side surfaces forming the pocket portion are respectively composed of first and second arcs having first and second centers, and The second center has the same axial position, and the circumferential position is not the same. Therefore, when the rolling element and the cage move relative to each other in the radial direction, the contact between the cage and the rolling element comes into contact with the surface, so that the radial edge of the circumferential side surface of the rolling element and the column portion Can be prevented from hitting the edge.
In addition, since the first and second circumferential side surfaces are respectively composed of the first and second arcs which are single arcs, when the rolling element and the cage are relatively moved in the circumferential direction, The cage can be brought into contact with one point.
As described above, since the contact area is reduced, it is possible to reduce the sliding friction generated between the rolling elements and the cage. Therefore, the rolling bearing cage of the present invention is suitable for a rolling element guide type cage having a large contact friction between the rolling element and the cage.

本発明の第１実施形態に係る転がり軸受用保持器の斜視図である。1 is a perspective view of a rolling bearing retainer according to a first embodiment of the present invention. 図１の転がり軸受用保持器を軸方向から見た断面図である。It is sectional drawing which looked at the cage for rolling bearings of FIG. 1 from the axial direction. 図１の転がり軸受用保持器を半径方向から見た断面図である。It is sectional drawing which looked at the cage for rolling bearings of FIG. 1 from the radial direction. 保持器と玉とが半径方向に相対移動した状態を示す断面図である。It is sectional drawing which shows the state which the cage | basket and the ball moved relatively to the radial direction. 玉が半径方向内側に移動した状態を示す断面図である。It is sectional drawing which shows the state which the ball | bowl moved to the radial inside. 玉が半径方向外側に移動した状態を示す断面図である。It is sectional drawing which shows the state which the ball | bowl moved to the radial direction outer side. （ａ）は第１実施形態の、（ｂ）〜（ｄ）は変形例の、第１及び第２中心並びに第１及び第２半径を示す図である。(A) is a figure which shows the 1st and 2nd center and 1st and 2nd radius of (b)-(d) of 1st Embodiment of a modification. 第２実施形態に係る転がり軸受用保持器を軸方向から見た断面図である。It is sectional drawing which looked at the cage for rolling bearings concerning 2nd Embodiment from the axial direction. 第３実施形態に係る転がり軸受用保持器を軸方向から見た断面図である。It is sectional drawing which looked at the cage for rolling bearings concerning 3rd Embodiment from the axial direction. 変形例に係る転がり軸受用保持器を軸方向から見た断面図である。It is sectional drawing which looked at the cage for rolling bearings concerning the modification from the axial direction.

以下、本発明の実施形態に係る転がり軸受用保持器について、図面を用いて説明する。   Hereinafter, a rolling bearing retainer according to an embodiment of the present invention will be described with reference to the drawings.

（第１実施形態）
図１に示すように、本実施形態の転がり軸受用保持器１（以下、単に保持器と呼ぶ。）は、円周方向に所定間隔で配置された複数の柱部１０と、隣り合う柱部１０の間に形成され、それぞれ転動体としての玉３（図２及び図３参照）を転動自在に保持するポケット部２０と、複数の柱部１０の軸方向一端部と接続する円環部３０と、を備える玉案内形式の冠型保持器である。 (First embodiment)
As shown in FIG. 1, the rolling bearing cage 1 (hereinafter simply referred to as a cage) of the present embodiment includes a plurality of column portions 10 arranged at predetermined intervals in the circumferential direction and adjacent column portions. 10 formed between the pockets 20 for holding the balls 3 (see FIGS. 2 and 3) as rolling elements so as to be freely rollable, and the annular parts connected to the axial one ends of the plurality of pillars 10 30 is a ball guide type crown-shaped cage.

図２及び図３に示すように、ポケット部２０は、隣り合う柱部１０のうち、一方の柱部１０の第１円周方向側面１１ａと、他方の柱部１０の第２円周方向側面１１ｂと、円環部３０の軸方向側面３１と、から構成される。   As shown in FIGS. 2 and 3, the pocket portion 20 includes the first circumferential side surface 11 a of one column portion 10 and the second circumferential side surface of the other column portion 10 among the adjacent column portions 10. 11b and the axial side surface 31 of the annular portion 30.

第１及び第２円周方向側面１１ａ、１１ｂは、それぞれ、第１及び第２中心Ｏａ、Ｏｂ並びに第１及び第２半径Ｒａ、Ｒｂを有する第１及び第２円弧１２ａ、１２ｂからなる球面形状である。すなわち、第１及び第２円周方向側面１１ａ、１１ｂはいわゆるゴシックアーチ形状に形成される。   The first and second circumferential side surfaces 11a and 11b are spherical shapes formed of first and second arcs 12a and 12b having first and second centers Oa and Ob and first and second radii Ra and Rb, respectively. It is. That is, the first and second circumferential side surfaces 11a and 11b are formed in a so-called gothic arch shape.

第１及び第２中心Ｏａ、Ｏｂは、互いに軸方向位置（図２における紙面垂直方向位置。図３における左右方向位置。）が同一であり、円周方向位置（図２における時計回り方向位置。図３における上下方向位置。）が不同であり、半径方向位置（図２における上下方向位置。図３における紙面垂直方向位置。）が同一である。第１及び第２半径Ｒａ、Ｒｂは、互いに等しく（Ｒａ＝Ｒｂ）、且つ玉３の半径よりも大きく設定される。   The first and second centers Oa, Ob have the same axial position (position in the direction perpendicular to the paper surface in FIG. 2; position in the left-right direction in FIG. 3), and circumferential position (clockwise direction position in FIG. 2). The vertical position in FIG. 3 is the same, and the radial position (the vertical position in FIG. 2; the vertical position in FIG. 3) is the same. The first and second radii Ra and Rb are set equal to each other (Ra = Rb) and larger than the radius of the ball 3.

第１及び第２中心Ｏａ、Ｏｂの位置を適正値にずらし、第１及び第２半径Ｒａ、Ｒｂを適正値にすることにより、軸受回転中、図４に示すように保持器１と玉３とが半径方向に相対移動した場合であっても、保持器１と玉３との接触を面当たりとすることが可能となる。仮に、第１及び第２中心Ｏａ、Ｏが同一位置にあり、第１及び第２円周方向側面１１ａ、１１ｂが単一中心の円弧であった場合、いかなる寸法関係においても、保持器１と玉３との接触がエッジ当たりとなってしまう。すなわち、ポケット部２０の半径方向端縁部（エッジ部）と玉３とが接触し、接触部の摩擦増大による不良や異常を引き起こす大きな要因となってしまう。本実施形態の保持器１は、この様なエッジ当たりを回避できるため、接触部の摩擦を低減することが可能である。   By shifting the positions of the first and second centers Oa and Ob to appropriate values and setting the first and second radii Ra and Rb to appropriate values, the cage 1 and the ball 3 are rotated as shown in FIG. Even when they move relative to each other in the radial direction, the contact between the cage 1 and the balls 3 can be made per surface. If the first and second centers Oa, O are at the same position and the first and second circumferential side surfaces 11a, 11b are single-centered arcs, the cage 1 and the The contact with the ball 3 is per edge. That is, the radial direction edge (edge part) of the pocket part 20 and the ball | bowl 3 contact, and it will become a big factor which causes the defect and abnormality by the friction increase of a contact part. Since the cage 1 of the present embodiment can avoid such edge contact, it is possible to reduce the friction of the contact portion.

上述の適正値とは、以下に示す条件を満たす数値である。図５には、保持器１が半径方向外側に移動し、当該保持器１の第１円周方向側面１１ａと玉３とがｅで接触し、第２円周方向側面１１ｂと玉３とがｆで接触している状態が示されている。また、第１円周方向側面１１ａの半径方向内側縁部がａで示され、半径方向外側縁部がｂで示され、第２円周方向側面１１ｂの半径方向内側縁部がｃで示され、半径方向外側縁部がｄで示されている。図５において、Ｙ軸方向は、第１及び第２円周方向側面１１ａ、１１ｂの周方向中間部を径方向に延びる中間線Ｍと同一方向であり、Ｘ軸方向は、Ｙ軸方向及び軸受回転軸方向と垂直の方向である。また、Ｙ軸は、軸受中心Ｏ及び保持器１の中心Ｏ１を通る軸であり、Ｘ軸は、保持器１の中心Ｏ１を通る軸である。このとき、Ｏａ、Ｏｂ、ａ〜ｆの座標はそれぞれ、（ＸＯａ、ＹＯａ）、（ＸＯｂ、ＹＯｂ）、（Ｘａ、Ｙａ）、（Ｘｂ、Ｙｂ）、（Ｘｃ、Ｙｃ）、（Ｘｄ、Ｙｄ）、（Ｘｅ、Ｙｅ）、（Ｘｆ、Ｙｆ）で、玉３の直径はＷで、第１及び第２中心Ｏａ、Ｏｂの中間線Ｍ（Ｙ軸）からのＸ軸方向ずれ量はＬａ、Ｌｂで、玉３のピッチ円直径はＰＣＤで示されている。 The appropriate value described above is a numerical value that satisfies the following conditions. In FIG. 5, the cage 1 moves radially outward, the first circumferential side surface 11 a and the ball 3 of the cage 1 come into contact with e, and the second circumferential side surface 11 b and the ball 3 are in contact with each other. The state of contact at f is shown. In addition, the radially inner edge of the first circumferential side surface 11a is denoted by a, the radially outer edge is denoted by b, and the radially inner edge of the second circumferential side surface 11b is denoted by c. The radially outer edge is indicated by d. In FIG. 5, the Y-axis direction is the same direction as the intermediate line M extending in the radial direction at the circumferential intermediate portions of the first and second circumferential side surfaces 11a, 11b, and the X-axis direction is the Y-axis direction and the bearing. This is a direction perpendicular to the rotation axis direction. Further, Y-axis is an axis passing through the center O 1 of the bearing center O and the cage 1, X-axis is an axis passing through the center O 1 of the cage 1. At this time, the coordinates of Oa, Ob, and a to f are (X Oa , Y Oa ), (X Ob , Y Ob ), (X a , Y a ), (X b , Y b ), and (X c ), respectively. , Y c ), (X d , Y d ), (X e , Y e ), (X f , Y f ), the diameter of the ball 3 is W, and the intermediate line between the first and second centers Oa, Ob The amounts of deviation in the X-axis direction from M (Y-axis) are La and Lb, and the pitch circle diameter of the balls 3 is indicated by PCD.

このとき、接触点ｅは、（Ｌａ−Ｒａ）＜Ｘｅ＜Ｘａ、且つＹａ＜Ｙｅ＜Ｙｂを満たす。また、Ｘｅ及びＹｅは以下のように表される。

Figure 2016070422
Figure 2016070422
 At this time, the contact point e satisfies (La−Ra) <X e <X a and Y a <Y e <Y b . X e and Y e are expressed as follows.
Figure 2016070422
Figure 2016070422

また、同様に、接触点ｆは、Ｘｃ＜Ｘｆ＜（Ｒｂ−Ｌｂ）、且つＹｃ＜Ｙｆ＜Ｙｄを満たす。また、Ｘｆ及びＹｆは以下のように表される。

Figure 2016070422
Figure 2016070422
 Similarly, contact point f is, X c <X f <( Rb-Lb), and satisfies the Y c <Y f <Y d . X f and Y f are expressed as follows.
Figure 2016070422
Figure 2016070422

図６には、保持器１が半径方向内側に移動し、当該保持器１の第１円周方向側面１１ａと玉３とがｇで接触し、第２円周方向側面１１ｂと玉３とがｈで接触している状態が示されている。ここで、ｇ及びｈの座標はそれぞれ、（Ｘｇ、Ｙｇ）、（Ｘｈ、Ｙｈ）である。 In FIG. 6, the cage 1 moves inward in the radial direction, the first circumferential side surface 11 a of the cage 1 and the ball 3 come into contact with g, and the second circumferential side surface 11 b and the ball 3 are in contact with each other. A contact state is indicated by h. Here, the coordinates of g and h are (X g , Y g ) and (X h , Y h ), respectively.

このとき、接触点ｇは、（Ｌａ−Ｒａ）＜Ｘｇ＜Ｘｂ、且つＹａ＜Ｙｇ＜Ｙｂを満たす。また、Ｘｇ及びＹｇは以下のように表される。

Figure 2016070422
Figure 2016070422
 At this time, the contact point g satisfies (La−Ra) <X g <X b and Y a <Y g <Y b . Xg and Yg are expressed as follows.
Figure 2016070422
Figure 2016070422

また、同様に、接触点ｈは、Ｘｄ＜Ｘｈ＜（Ｒｂ−Ｌｂ）、且つＹｃ＜Ｙｈ＜Ｙｄを満たす。また、Ｘｈ及びＹｈは以下のように表される。

Figure 2016070422
Figure 2016070422
 Similarly, the contact point h satisfies X d <X h <(Rb−Lb) and Y c <Y h <Y d . X h and Y h are expressed as follows.
Figure 2016070422
Figure 2016070422

このように、接触点ｅ〜ｈにおいて、保持器１の第１及び第２円周方向側面１１ａ、１１ｂと玉３との接触条件が全て満たされるように設定される。   Thus, at the contact points e to h, the contact conditions between the first and second circumferential side surfaces 11a and 11b of the cage 1 and the ball 3 are all satisfied.

また、玉３の公転によって、当該玉３と保持器１とが円周方向に接触した場合であっても、第１及び第２円周方向側面１１ａ、１１ｂは、それぞれ玉３の公転方向（円周方向）において単一の第１及び第２円弧１２ａ、１２ｂからなるので、通常の保持器と同様に、玉３と保持器１とを一点で接触させることができる。   Moreover, even if the said ball | bowl 3 and the holder | retainer 1 contact in the circumferential direction by revolution of the ball | bowl 3, the 1st and 2nd circumferential direction side surfaces 11a and 11b are the revolution directions ( Since it consists of a single first and second arcs 12a, 12b in the circumferential direction), the ball 3 and the cage 1 can be brought into contact at a single point in the same way as a normal cage.

なお、軸受回転軸方向の自由度のためには、本実施形態のように、第１及び第２中心Ｏａ、Ｏｂの半径方向位置は同一であることが好ましく、第１及び第２円弧１２ａ、１２ｂの第１及び第２半径Ｒａ、Ｒｂは同一であることが好ましい（図７（ａ）参照）。しかしながら、保持器暴れ抑制等の目的により、意図的に保持器１に拘束を与えるために、第１及び第２中心Ｏａ、Ｏｂの半径方向位置、並びに、第１及び第２半径Ｒａ、Ｒｂのうち、一方又は両方を異なる値としてもよい。例えば、図７（ｂ）に示すように、第１及び第２中心Ｏａ、Ｏｂの半径方向位置が不同であり、第１及び第２半径Ｒａ、Ｒｂが同一であってもよい。また、図７（ｃ）に示すように、第１及び第２中心Ｏａ、Ｏｂの半径方向位置が同一であり、第１及び第２半径Ｒａ、Ｒｂが不同であってもよい。また、図７（ｄ）に示すように、第１及び第２中心Ｏａ、Ｏｂの半径方向位置、並びに第１及び第２半径Ｒａ、Ｒｂが共に不同であってもよい。   For the degree of freedom in the bearing rotation axis direction, the radial positions of the first and second centers Oa and Ob are preferably the same as in the present embodiment, and the first and second arcs 12a, The first and second radii Ra and Rb of 12b are preferably the same (see FIG. 7A). However, in order to intentionally constrain the cage 1 for the purpose of restraint rampage suppression or the like, the radial positions of the first and second centers Oa, Ob and the first and second radii Ra, Rb Of these, one or both may be different values. For example, as shown in FIG. 7B, the radial positions of the first and second centers Oa and Ob may be the same, and the first and second radii Ra and Rb may be the same. Moreover, as shown in FIG.7 (c), the radial direction position of 1st and 2nd center Oa, Ob may be the same, and 1st and 2nd radius Ra, Rb may be dissimilar. Moreover, as shown in FIG.7 (d), the radial direction position of 1st and 2nd center Oa, Ob and 1st and 2nd radius Ra, Rb may be disagree.

また、保持器１の半径方向動き量は、第１及び第２中心Ｏａ、Ｏｂの座標、第１及び第２円弧１２ａ、１２ｂの第１及び第２半径Ｒａ、Ｒｂ、玉３の直径Ｗ、及び玉３のピッチ円直径ＰＣＤの関係から決定される。これらの値は、軸受の用途により変更可能な数値であるが、いずれの値に設定したとしても、上述したエッジ当たりが回避可能な値となっていれば、同様の効果が発揮可能である。   The radial movement amount of the cage 1 includes the coordinates of the first and second centers Oa and Ob, the first and second radii Ra and Rb of the first and second arcs 12a and 12b, the diameter W of the ball 3, And the pitch circle diameter PCD of the ball 3 is determined. Although these values are numerical values that can be changed depending on the application of the bearing, even if any value is set, the same effect can be exhibited as long as the above-described edge contact can be avoided.

また、図１及び図３に戻り、ポケット部２０を構成する円環部３０の軸方向側面３１は、平面形状とされている。したがって、保持器１と玉３とが軸方向に相対移動した場合であっても、玉３は軸方向側面３１と一点で接触するので、軸方向動き量規制時の摩擦も低減できる。また、軸方向側面３１の位置はある程度自由に設計可能であるため、保持器１の動き量もある程度自由に設定可能となる。   Returning to FIGS. 1 and 3, the axial side surface 31 of the annular portion 30 constituting the pocket portion 20 has a planar shape. Therefore, even when the cage 1 and the ball 3 move relative to each other in the axial direction, the ball 3 comes into contact with the axial side surface 31 at a single point, so that friction during the axial movement amount regulation can also be reduced. Further, since the position of the axial side surface 31 can be designed freely to some extent, the amount of movement of the cage 1 can be set to some extent freely.

（第２実施形態）
次に、本発明の第２実施形態に係る転がり軸受用保持器１について、図８を用いて説明する。本実施形態の保持器１において、第１及び第２円周方向側面１１ａ、１１ｂは、第１及び第２中心Ｏａ、Ｏｂを有する第１及び第２円弧１２ａ、１２ｂと、第１及び第２円弧１２ａ、１２ｂの径方向外側端部と接続して平面形状である第１及び第２ストレート部１３ａ、１３ｂと、からなる。なお、第１及び第２円周方向側面１１ａ、１１ｂのうち、径方向内側の略半分が第１及び第２円弧１２ａ、１２ｂとされ、径方向外側の略半分が第１及び第２ストレート部１３ａ、１３ｂとされる。また、本実施形態の第１及び第２ストレート部１３ａ、１３ｂは中間線Ｍと略平行となるように形成される。なお、第１及び第２ストレート部１３ａ、１３ｂは、径方向外側に向かうにしたがって、中間線Ｍから円周方向に離間するような形状としても構わない。 (Second Embodiment)
Next, a rolling bearing cage 1 according to a second embodiment of the present invention will be described with reference to FIG. In the cage 1 of the present embodiment, the first and second circumferential side surfaces 11a and 11b have first and second arcs 12a and 12b having first and second centers Oa and Ob, and first and second. The first and second straight portions 13a and 13b are connected to the radially outer ends of the arcs 12a and 12b and have a planar shape. Of the first and second circumferential side surfaces 11a and 11b, approximately half of the radially inner side is the first and second arcs 12a and 12b, and approximately half of the radially outer side is the first and second straight portions. 13a and 13b. Further, the first and second straight portions 13 a and 13 b of the present embodiment are formed so as to be substantially parallel to the intermediate line M. Note that the first and second straight portions 13a and 13b may be shaped so as to be separated from the intermediate line M in the circumferential direction toward the radially outer side.

このように構成することで、保持器１の半径方向の動き量の規制が、第１及び第２円弧１２ａ、１２ｂによるもののみとなるため、玉３と保持器１の接触位置のランダム性が減少し、保持器１の動きを安定させることが可能となる。また、運転時の遠心力により保持器１が膨張する際、玉３公転方向（円周方向）のポケット部２０の隙間増大に合わせて、保持器１の径も大きくなるため、相対的に保持器１の半径方向動き量の増大を抑制し、又は減少させることが可能となる。   With this configuration, since the restriction of the amount of movement of the cage 1 in the radial direction is limited only by the first and second arcs 12a and 12b, the contact position between the ball 3 and the cage 1 is random. It becomes possible to decrease and to stabilize the movement of the cage 1. In addition, when the cage 1 expands due to centrifugal force during operation, the diameter of the cage 1 increases as the gap of the pocket portion 20 in the ball 3 revolution direction (circumferential direction) increases, so that the cage 1 is relatively held. It is possible to suppress or reduce an increase in the amount of radial movement of the device 1.

（第３実施形態）
次に、本発明の第３実施形態に係る転がり軸受用保持器１について、図９を用いて説明する。本実施形態の保持器１において、第１及び第２円周方向側面１１ａ、１１ｂは、第１及び第２中心Ｏａ、Ｏｂを有する第１及び第２円弧１２ａ、１２ｂと、第１及び第２円弧１２ａ、１２ｂの径方向内側端部と接続して平面形状である第１及び第２ストレート部１３ａ、１３ｂと、からなる。なお、第１及び第２円周方向側面１１ａ、１１ｂのうち、径方向外側の略半分が第１及び第２円弧１２ａ、１２ｂとされ、径方向内側の略半分が第１及び第２ストレート部１３ａ、１３ｂとされる。また、本実施形態の第１及び第２ストレート部１３ａ、１３ｂは中間線Ｍと略平行となるように形成される。なお、第１及び第２ストレート部１３ａ、１３ｂは、径方向内側に向かうにしたがって、中間線Ｍから円周方向に離間するような形状としても構わない。 (Third embodiment)
Next, a rolling bearing cage 1 according to a third embodiment of the present invention will be described with reference to FIG. In the cage 1 of the present embodiment, the first and second circumferential side surfaces 11a and 11b have first and second arcs 12a and 12b having first and second centers Oa and Ob, and first and second. The first and second straight portions 13a and 13b are connected to the radially inner ends of the arcs 12a and 12b and have a planar shape. Of the first and second circumferential side surfaces 11a and 11b, approximately half of the radially outer side is the first and second arcs 12a and 12b, and approximately half of the radially inner side is the first and second straight portions. 13a and 13b. Further, the first and second straight portions 13 a and 13 b of the present embodiment are formed so as to be substantially parallel to the intermediate line M. The first and second straight portions 13a and 13b may be shaped so as to be separated from the intermediate line M in the circumferential direction toward the radially inner side.

このように構成することで、保持器１の半径方向の動き量の規制が、第１及び第２円弧１２ａ、１２ｂによるもののみとなるため、玉３と保持器１の接触位置のランダム性が減少し、保持器１の動きを安定させることが可能となる。また、本実施形態では、遠心力の増大により、保持器１の動き量を大きくできるので、保持器１の膨張による第１及び第２円弧１２ａ、１２ｂと玉３との干渉の発生を回避できるとともに、保持器１の半径方向動き量の初期値を極限まで小さく設定することが可能となる。   With this configuration, since the restriction of the amount of movement of the cage 1 in the radial direction is limited only by the first and second arcs 12a and 12b, the contact position between the ball 3 and the cage 1 is random. It becomes possible to decrease and to stabilize the movement of the cage 1. In the present embodiment, since the amount of movement of the cage 1 can be increased by increasing the centrifugal force, the occurrence of interference between the first and second arcs 12a, 12b and the ball 3 due to the expansion of the cage 1 can be avoided. At the same time, the initial value of the radial movement amount of the cage 1 can be set as small as possible.

尚、本発明は、前述した実施形態に限定されるものではなく、適宜変更、改良等が可能である。   In addition, this invention is not limited to embodiment mentioned above, A change, improvement, etc. are possible suitably.

例えば、上述の実施形態においては、本発明を、円環部３０を１つのみ有する所謂冠型保持器１に適用した構成を示したが、一対の円環部を有する所謂かご形状保持器にも適用可能である。図１０には、複数の柱部１０の軸方向両端部とそれぞれ接続する第１及び第２円環部３０ａ、３０ｂを備える、かご形状保持器１が示されている。この保持器１においては、ポケット部２０を構成する第１及び第２円環部３０ａ、３０ｂの軸方向側面３１ａ、３１ｂが、平面形状であるので、保持器１の軸方向動き量を精度良く設定することが可能となる。   For example, in the above-described embodiment, the configuration in which the present invention is applied to the so-called crown-shaped cage 1 having only one annular portion 30 is shown. Is also applicable. FIG. 10 shows a cage-shaped cage 1 that includes first and second annular portions 30a and 30b that are respectively connected to both axial ends of the plurality of column portions 10. In this cage 1, since the axial side surfaces 31a and 31b of the first and second annular portions 30a and 30b constituting the pocket portion 20 have a planar shape, the axial movement amount of the cage 1 can be accurately determined. It becomes possible to set.

１ 転がり軸受用保持器
３ 玉（転動体）
１０ 柱部
１１ａ 第１円周方向側面
１１ｂ 第２円周方向側面
１２ａ 第１円弧
１２ｂ 第２円弧
１３ａ 第１ストレート部
１３ｂ 第２ストレート部
２０ ポケット部
３０ 円環部
３０ａ 第１円環部
３０ｂ 第２円環部
３１、３１ａ、３１ｂ 軸方向側面
Ｌａ Ｘ軸方向ずれ量
Ｍ 中間線
Ｏａ 第１中心
Ｏｂ 第２中心
ＰＣＤ ピッチ円直径
Ｒａ 第１半径
Ｒｂ 第２半径
Ｗ 玉の直径 1 Rolling bearing cage 3 Ball (rolling element)
10 Column 11a First circumferential side surface 11b Second circumferential side surface 12a First arc 12b Second arc 13a First straight portion 13b Second straight portion 20 Pocket portion 30 Annular portion 30a First annular portion 30b First 2-ring part 31, 31a, 31b Axial side face La X-axis direction deviation amount M Middle line Oa First center Ob Second center PCD Pitch circle diameter Ra First radius Rb Second radius W Diameter of ball

Claims (8)

周方向に所定間隔で配置された複数の柱部と、
隣り合う前記柱部の間に形成され、それぞれ転動体を転動自在に保持するポケット部と、
を備える転がり軸受用保持器であって、
前記ポケット部は、隣り合う前記柱部のうち、一方の前記柱部の第１円周方向側面と、他方の前記柱部の第２円周方向側面と、を有し、
前記第１及び第２円周方向側面は、それぞれ、第１及び第２中心を有する第１及び第２円弧からなり、
前記第１及び第２中心は、軸方向位置が同一であり、円周方向位置が不同である、転がり軸受用保持器。 A plurality of pillars arranged at predetermined intervals in the circumferential direction;
A pocket portion formed between the adjacent column portions, each holding a rolling element so as to be freely rollable;
A rolling bearing retainer comprising:
The pocket portion includes a first circumferential side surface of one of the column portions and a second circumferential side surface of the other column portion among the adjacent column portions,
The first and second circumferential side surfaces comprise first and second arcs having first and second centers, respectively.
The first and second centers are rolling bearing cages having the same axial position and the same circumferential position. 前記第１及び第２中心は、半径方向位置が同一である、請求項１に記載の転がり軸受用保持器。   The rolling bearing retainer according to claim 1, wherein the first and second centers have the same radial position. 前記第１及び第２中心は、半径方向位置が不同である、請求項１に記載の転がり軸受用保持器。   The rolling bearing retainer according to claim 1, wherein the first and second centers have different radial positions. 前記第１及び第２円弧は、半径が同一である、請求項１〜３の何れか１項に記載の転がり軸受用保持器。   The rolling bearing cage according to any one of claims 1 to 3, wherein the first and second arcs have the same radius. 前記第１及び第２円弧は、半径が不同である、請求項１〜３の何れか１項に記載の転がり軸受用保持器。   The rolling bearing retainer according to any one of claims 1 to 3, wherein the first and second arcs have the same radius. 周方向に所定間隔で配置された複数の柱部と、
隣り合う前記柱部の間に形成され、それぞれ転動体を転動自在に保持するポケット部と、
を備える転がり軸受用保持器であって、
前記ポケット部は、隣り合う前記柱部のうち、一方の前記柱部の第１円周方向側面と、他方の前記柱部の第２円周方向側面と、を有し、
前記第１及び第２円周方向側面は、それぞれ、第１及び第２中心を有する第１及び第２円弧と、前記第１及び第２円弧と接続して平面形状である第１及び第２ストレート部と、からなり、
前記第１及び第２中心は、軸方向位置が同一であり、円周方向位置が不同である、転がり軸受用保持器。 A plurality of pillars arranged at predetermined intervals in the circumferential direction;
A pocket portion formed between the adjacent column portions, each holding a rolling element so as to be freely rollable;
A rolling bearing retainer comprising:
The pocket portion includes a first circumferential side surface of one of the column portions and a second circumferential side surface of the other column portion among the adjacent column portions,
The first and second circumferential side surfaces respectively have first and second arcs having first and second centers, and first and second planar shapes connected to the first and second arcs. It consists of a straight part,
The first and second centers are rolling bearing cages having the same axial position and the same circumferential position. 前記転がり軸受用保持器は、前記複数の柱部の軸方向一端部と接続する円環部を備え、
前記ポケット部は、前記第１及び第２円周方向側面と、前記円環部の軸方向側面と、を有し、
前記円環部の軸方向側面は、平面形状である、請求項１〜６の何れか１項に記載の転がり軸受用保持器。 The rolling bearing retainer includes an annular portion connected to one axial end portion of the plurality of column portions,
The pocket portion includes the first and second circumferential side surfaces and the axial side surface of the annular portion,
The rolling bearing retainer according to any one of claims 1 to 6, wherein an axial side surface of the annular portion has a planar shape. 前記転がり軸受用保持器は、前記複数の柱部の軸方向両端部とそれぞれ接続する第１及び第２円環部を備え、
前記ポケット部は、前記第１及び第２円周方向側面と、前記第１及び第２円環部の軸方向側面と、を有し、
前記第１及び第２円環部の軸方向側面は、平面形状である、請求項１〜６の何れか１項に記載の転がり軸受用保持器。 The rolling bearing retainer includes first and second annular portions respectively connected to axial end portions of the plurality of column portions,
The pocket portion includes the first and second circumferential side surfaces and the axial side surface of the first and second annular portions,
The rolling bearing cage according to any one of claims 1 to 6, wherein the axial side surfaces of the first and second annular portions have a planar shape.
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JP2014101899A (en) * 2012-11-16 2014-06-05 Ntn Corp Snap cage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108397476A (en) * 2017-02-06 2018-08-14 株式会社捷太格特 Ball bearing
CN108397476B (en) * 2017-02-06 2021-09-28 株式会社捷太格特 Ball bearing
WO2023157428A1 (en) * 2022-02-17 2023-08-24 日本精工株式会社 Cage

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