JP2003049838A - Ball bearing - Google Patents
Ball bearingInfo
- Publication number
- JP2003049838A JP2003049838A JP2001234775A JP2001234775A JP2003049838A JP 2003049838 A JP2003049838 A JP 2003049838A JP 2001234775 A JP2001234775 A JP 2001234775A JP 2001234775 A JP2001234775 A JP 2001234775A JP 2003049838 A JP2003049838 A JP 2003049838A
- Authority
- JP
- Japan
- Prior art keywords
- ball
- ball bearing
- diameter
- cage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/38—Ball cages
- F16C33/41—Ball cages comb-shaped
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、ミニチュア玉軸
受のように玉径が小さい玉軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ball bearing having a small ball diameter such as a miniature ball bearing.
【０００２】[0002]
【従来の技術】従来の玉軸受(1)は、例えば、図７およ
び図８に示すように、固定輪である外輪(2)、回転輪で
ある内輪(3)、これらの間に配置された複数の玉(4)およ
び冠型保持器(5)を備えている。2. Description of the Related Art A conventional ball bearing (1) is, for example, as shown in FIGS. 7 and 8, arranged with an outer ring (2) which is a fixed ring, an inner ring (3) which is a rotating ring, and between these. It has a plurality of balls (4) and a crown type cage (5).
【０００３】近年、玉径が小さい玉軸受(1)において
は、保持器(5)のプラスチック化が進み、各分野で使用
されている。玉径が大きい玉軸受の保持器では、一般的
には、玉ガイドとされることが多いが、玉径が例えば
０．８φ以下のミニチュア玉軸受のプラスチック保持器
(5)では、樹脂成形精度上ポケット部を球面にすること
ができないため、図に示すように、円筒形状のポケット
面(6)とされ、内輪ガイドまたは外輪ガイド（図示した
例では内輪ガイド）とされている。In recent years, in the ball bearing (1) having a small ball diameter, the cage (5) has been made plastic, and is used in various fields. Ball cages with large ball diameters are often used as ball guides, but plastic cages for miniature ball bearings with a ball diameter of 0.8φ or less, for example.
In (5), since the pocket cannot be made spherical due to the precision of resin molding, it is a cylindrical pocket surface (6) as shown in the figure, and it is an inner ring guide or outer ring guide (inner ring guide in the example shown). It is said that.
【０００４】[0004]
【発明が解決しようとする課題】この種の玉軸受では、
低トルク・低騒音の要求が厳しくなり、保持器が原因の
微小トルク変動によって、要求を達成することができな
い場合が生じている。上記従来の玉軸受(1)では、ポケ
ット面を球面状にすることができないため、保持器(5)
の軸と内輪(3)の軸とが若干ずれた状態で保持器(5)と内
輪(3)とが接触することになり、図７および図８にＧで
示す接触部が大きくなり、これが原因で、トルクロスが
大きくなって、微小トルク変動も大きくなると考えられ
る。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention In this type of ball bearing,
Demands for low torque and low noise are becoming strict, and there are cases where the requirements cannot be achieved due to minute torque fluctuations caused by the cage. In the above conventional ball bearing (1), the pocket surface cannot be made spherical, so the cage (5)
The cage (5) and the inner ring (3) come into contact with each other with the shaft of the inner ring (3) and the shaft of the inner ring slightly displaced, and the contact portion indicated by G in FIGS. 7 and 8 becomes large. It is considered that due to this, the torque cross becomes large and the minute torque fluctuation also becomes large.
【０００５】この発明の目的は、円筒状ポケット面を有
する保持器を使用しかつ球面状ポケット面を有する保持
器を使用したものと同等のトルク変動を実現した玉軸受
を提供することにある。An object of the present invention is to provide a ball bearing which uses a cage having a cylindrical pocket surface and realizes a torque fluctuation equivalent to that using a cage having a spherical pocket surface.
【０００６】[0006]
【課題を解決するための手段および発明の効果】第１の
発明による玉軸受は、外輪、内輪、これらの間に配置さ
れた複数の玉および保持器を備え、保持器が径方向に円
筒状のポケット面を有している玉軸受において、保持器
の内周面および外周面のうちの保持器をガイドする面に
接触する面に、周方向に間隔をおいて少なくとも３つの
突起が設けられていることを特徴とするものである。A ball bearing according to the first invention comprises an outer ring, an inner ring, a plurality of balls arranged between them, and a cage, and the cage has a cylindrical shape in the radial direction. In a ball bearing having a pocket surface, at least three protrusions are provided at intervals in the circumferential direction on a surface of the inner peripheral surface and the outer peripheral surface of the cage that comes into contact with the surface that guides the cage. It is characterized by that.
【０００７】第１の発明の玉軸受によると、保持器の突
起と軸受のガイド面とが接触するので、接触面積が小さ
くなり、トルクロスが小さくなる。したがって、トルク
変動も小さくなる。According to the ball bearing of the first invention, the protrusion of the cage and the guide surface of the bearing are in contact with each other, so that the contact area is small and the torque cross is small. Therefore, the torque fluctuation is reduced.
【０００８】第２の発明による玉軸受は、外輪、内輪、
これらの間に配置された複数の玉および保持器を備え、
保持器が径方向に円筒状のポケット面を有している玉軸
受において、所定間隔をおいた少なくとも３つのポケッ
ト面に、玉のピッチ円径よりも径大の位置および径小の
位置のいずれかにあって玉径よりも小さい周方向の対面
間部が形成されていることを特徴とするものである。The ball bearing according to the second aspect of the present invention comprises an outer ring, an inner ring,
With multiple balls and cages placed between them,
In a ball bearing in which the cage has a cylindrical pocket surface in the radial direction, at least three pocket surfaces at a predetermined interval have a diameter larger or smaller than the pitch circle diameter of the balls. It is characterized in that a facing inter-face portion in the circumferential direction, which is smaller than the ball diameter, is formed.
【０００９】保持器は、冠型であることが好ましい。冠
型では、保持器のポケット面が軸方向に開口しており、
玉のピッチ円径よりも径大または径小の位置にあって玉
径よりも小さい周方向の対面間部を形成しても、保持器
に玉を保持させる際の妨げにはならない。The retainer is preferably crowned. In the crown type, the pocket surface of the cage is opened in the axial direction,
Even if the facing facing portion in the circumferential direction, which is smaller or larger than the pitch diameter of the balls and is smaller than the ball diameter, is formed, it does not hinder the holding of the balls by the cage.
【００１０】対面間部は、例えば、ポケット１つ置きに
設けられる。また、対面間部は、ポケット面における外
輪側の縁部の最奥部とポケット開口側の両端部との間の
部分にそれぞれ１つずつの突起を設けることによって形
成される。The facing portions are provided, for example, every other pocket. In addition, the facing portion is formed by providing one protrusion each at a portion between the innermost portion of the outer ring side edge portion of the pocket surface and both end portions of the pocket opening side.
【００１１】第２の発明の玉軸受によると、対面間部が
設けられているポケット面では、玉の径方向への動きが
規制され、保持器の径方向への動きが減少する。これに
より、保持器と内輪とが広い範囲で接触することが防止
され、トルクロスが小さくなる。したがって、トルク変
動も小さくなる。According to the ball bearing of the second aspect of the invention, the radial movement of the balls is restricted on the pocket surface provided with the facing portion, and the radial movement of the cage is reduced. As a result, the cage and the inner ring are prevented from coming into contact with each other over a wide range, and the torque cloth becomes small. Therefore, the torque fluctuation is reduced.
【００１２】[0012]
【発明の実施の形態】この発明の実施の形態を、以下図
面を参照して説明する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.
【００１３】図１から図３までは、第１の発明による玉
軸受の実施形態を示している。同図において、玉軸受(1
1)は、固定輪である外輪(12)、回転輪である内輪(13)、
これらの間に配置された複数の転動体である玉(14)およ
び保持器(15)を備えている。1 to 3 show an embodiment of a ball bearing according to the first invention. In the figure, ball bearings (1
1) is an outer ring (12) that is a fixed wheel, an inner ring (13) that is a rotating wheel,
A ball (14) and a cage (15), which are a plurality of rolling elements, are arranged between them.
【００１４】保持器(15)は、冠型で、玉(14)を周方向に
等配に離隔する径方向に円筒状のポケット面(16)を有し
ている。保持器(15)の内周には、周方向に所定間隔をお
いて計３つの突起(17)が設けられている。突起(17)は、
円周上でほぼ等配になるように設けられることが好まし
く、ポケット面と一致する位置にあってもよく、また、
ずれた位置にあってもよい。突起(17)の数は、３以上で
あればよく、特に限定されるものではない。The retainer (15) is of a crown type and has a radially cylindrical pocket surface (16) for equally spacing the balls (14) in the circumferential direction. A total of three protrusions (17) are provided on the inner circumference of the cage (15) at predetermined intervals in the circumferential direction. The protrusion (17)
It is preferable that they are provided so as to be substantially evenly distributed on the circumference, and they may be located at the same position as the pocket surface.
It may be in a displaced position. The number of the protrusions (17) may be 3 or more and is not particularly limited.
【００１５】この実施形態のものによると、保持器(15)
の突起(17)と内輪(13)のガイド面とが接触するので、突
起(17)がない場合に比べて、保持器(15)とガイド面との
接触面積が小さくなり、トルクロスが小さくなる。した
がって、トルク変動も小さくなる。According to this embodiment, the cage (15)
Since the protrusion (17) of the contact part and the guide surface of the inner ring (13) contact each other, the contact area between the retainer (15) and the guide surface is smaller and torque cross is smaller than in the case without the protrusion (17). . Therefore, the torque fluctuation is reduced.
【００１６】図４から図６までは、第２の発明による玉
軸受の実施形態を示している。同図において、玉軸受(2
1)は、固定輪である外輪(22)、回転輪である内輪(23)、
これらの間に配置された複数の転動体である玉(24)およ
び保持器(25)を備えている。4 to 6 show an embodiment of a ball bearing according to the second invention. In the figure, ball bearings (2
1) is an outer ring (22) that is a fixed wheel, an inner ring (23) that is a rotating wheel,
A ball (24) and a cage (25), which are a plurality of rolling elements, are arranged between them.
【００１７】保持器(25)は、冠型で、玉(24)を周方向に
等配に離隔する径方向に円筒状のポケット面(26)を有し
ている。そして、所定のポケット面(26)には、外輪側の
縁部の最奥部とポケット開口側の両端部との間の部分に
それぞれ１つずつの突起(27)が設けられている。突起(2
7)は、玉のピッチ円径（ＰＣＤ）よりも大きい径の位置
に設けられており、これらの突起(27)により、玉径より
も小さい周方向の対面間部がポケット面(26)に形成され
ている。突起(27)の形状は、線接触や面接触にならない
ように、お椀状が好ましく、また、突起(27)の大きさ
は、回転精度に影響しないように、玉径の１／１０以下
とすることが好ましい。The retainer (25) is of a crown type and has a radially cylindrical pocket surface (26) for equally spacing the balls (24) in the circumferential direction. The predetermined pocket surface (26) is provided with one protrusion (27) at a portion between the innermost portion of the outer ring side edge portion and both end portions on the pocket opening side. Protrusion (2
7) is provided at a position having a diameter larger than the pitch circle diameter (PCD) of the ball, and these projections (27) cause the facing surface portion in the circumferential direction smaller than the ball diameter to be the pocket surface (26). Has been formed. The shape of the protrusion (27) is preferably a bowl shape so as not to make line contact or surface contact, and the size of the protrusion (27) is 1/10 or less of the ball diameter so as not to affect the rotation accuracy. Preferably.
【００１８】この実施形態の玉軸受(21)によると、対面
間部を形成する突起(27)が設けられているポケット面(2
6)では、玉(24)の径方向外方への動きが規制され、内輪
(23)に対する保持器(25)の径方向への動きが減少する。
これにより、実質的に玉ガイドとなって、保持器(25)と
内輪(23)とが広い範囲で接触することが防止され、トル
クロスが小さくなる。したがって、トルク変動も小さく
なる。According to the ball bearing (21) of this embodiment, the pocket face (2) provided with the protrusion (27) forming the facing portion is formed.
In 6), the movement of the balls (24) in the radial direction is restricted and the inner ring
Radial movement of the retainer (25) relative to (23) is reduced.
This substantially serves as a ball guide and prevents the cage (25) and the inner ring (23) from contacting each other in a wide range, and the torque cross becomes small. Therefore, the torque fluctuation is reduced.
【００１９】なお、図４から図６までに示した形態で
は、突起(27)を玉(24)のピッチ円径よりも径大の位置に
設けたが、突起を玉(24)のピッチ円径よりも径小の位置
に設けてもよい。In the embodiment shown in FIGS. 4 to 6, the projection (27) is provided at a position larger in diameter than the pitch circle diameter of the ball (24), but the projection is formed on the pitch circle of the ball (24). It may be provided at a position smaller in diameter than the diameter.
【図１】第１の発明による玉軸受の実施形態を示す横断
面図である。FIG. 1 is a cross-sectional view showing an embodiment of a ball bearing according to the first invention.
【図２】保持器の軸方向から見た図である。FIG. 2 is a view seen from the axial direction of the cage.
【図３】図２のIII-III線に沿う断面図である。FIG. 3 is a sectional view taken along the line III-III in FIG.
【図４】第２の発明による玉軸受の実施形態を示す横断
面図である。FIG. 4 is a transverse sectional view showing an embodiment of a ball bearing according to the second invention.
【図５】同縦断面図である。FIG. 5 is a vertical sectional view of the same.
【図６】同斜視図である。FIG. 6 is a perspective view of the same.
【図７】従来の玉軸受を示す横断面図である。FIG. 7 is a cross-sectional view showing a conventional ball bearing.
【図８】同縦断面図である。FIG. 8 is a vertical sectional view of the same.
(11)(21) 玉軸受 (12)(22) 外輪 (13)(23) 内輪 (14)(24) 玉 (15)(25) 保持器 (16)(26) 円周状ポケット面 (17)(27) 突起 (11) (21) Ball bearing (12) (22) Outer ring (13) (23) Inner ring (14) (24) jade (15) (25) Cage (16) (26) Circumferential pocket surface (17) (27) Protrusion
Claims (4)
数の玉および保持器を備え、保持器が径方向に円筒状の
ポケット面を有している玉軸受において、 保持器の内周面および外周面のうちのガイドされている
面に、周方向に間隔をおいて少なくとも３つの突起が設
けられていることを特徴とする玉軸受。1. A ball bearing comprising an outer ring, an inner ring, a plurality of balls arranged between them, and a retainer, wherein the retainer has a cylindrical pocket surface in a radial direction. A ball bearing, wherein at least three protrusions are provided at intervals in the circumferential direction on the guided surface of the surface and the outer peripheral surface.
数の玉および保持器を備え、保持器が径方向に円筒状の
ポケット面を有している玉軸受において、 所定間隔をおいた少なくとも３つのポケット面に、玉の
ピッチ円径よりも径大の位置および径小の位置のいずれ
かにあって玉径よりも小さい周方向の対面間部が形成さ
れていることを特徴とする玉軸受。2. A ball bearing having an outer ring, an inner ring, a plurality of balls arranged between them, and a retainer, and the retainer having a cylindrical pocket surface in the radial direction, at a predetermined interval. It is characterized in that at least three pocket surfaces are formed with a facing portion in the circumferential direction, which is located at a position having a diameter larger than the pitch diameter of the ball or a position having a diameter smaller than the ball diameter, and is smaller than the ball diameter. Ball bearings.
の縁部の最奥部とポケット開口側の両端部との間の部分
にそれぞれ１つずつの突起を設けることによって形成さ
れている請求項３の玉軸受。4. The face-to-face portion is formed by providing one protrusion each at a portion between the innermost portion of the outer ring side edge portion of the pocket surface and both end portions of the pocket opening side. Item 3 Ball bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001234775A JP2003049838A (en) | 2001-08-02 | 2001-08-02 | Ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001234775A JP2003049838A (en) | 2001-08-02 | 2001-08-02 | Ball bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003049838A true JP2003049838A (en) | 2003-02-21 |
Family
ID=19066324
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001234775A Withdrawn JP2003049838A (en) | 2001-08-02 | 2001-08-02 | Ball bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003049838A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010094016A3 (en) * | 2009-02-16 | 2010-12-23 | The Timken Company | Prong cage for an angular contact ball bearing and method for assembling an angular contact ball bearing |
-
2001
- 2001-08-02 JP JP2001234775A patent/JP2003049838A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010094016A3 (en) * | 2009-02-16 | 2010-12-23 | The Timken Company | Prong cage for an angular contact ball bearing and method for assembling an angular contact ball bearing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7427163B2 (en) | Self-aligning antifriction bearing and cage for said self-aligning antifriction bearing | |
| CN105190065B (en) | Spherical roller bearing cage with cylindrical guide contact surfaces and radially outwardly turned inward flanges | |
| JPH0619176B2 (en) | 4-point contact ball bearing synthetic resin cage | |
| US4838712A (en) | Ball bearing and the retainer thereof | |
| JP2008115903A (en) | Cage for rolling bearing and rolling bearing | |
| JP2008169937A (en) | Bearing unit | |
| JP2007078078A (en) | Retainer for rolling ball bearing and its manufacturing method | |
| JP2007327516A (en) | Deep groove ball bearing | |
| JP2000291662A (en) | Ball bearing | |
| JP2002310167A (en) | Roller bearing | |
| JP2007056930A (en) | Resin-made cage for rolling bearing and rolling bearing | |
| JP4454336B2 (en) | Linear motion bearing mechanism | |
| JP2003049838A (en) | Ball bearing | |
| JP5272737B2 (en) | Crown type cage and ball bearing | |
| JP2000320558A (en) | Synthetic resin made retainer for roller bearing | |
| JP7092422B2 (en) | Retaining rings for linear motion bearings and linear motion bearings | |
| JP2006017180A (en) | Crown retainer made of synthetic resin | |
| JP2006153200A (en) | Cage for roller bearing and roller bearing | |
| JP4147500B2 (en) | Roller bearing cage | |
| JP2998626B2 (en) | Synthetic resin cage for angular ball bearings | |
| JP4424092B2 (en) | Synthetic resin crown cage | |
| JP2000002245A (en) | Plastic retainer for thrust ball bearing | |
| JP2001214930A (en) | Interval body for ball bearing | |
| JP2006144815A (en) | Roller bearing | |
| US11846316B2 (en) | Rolling bearing for high speeds equipped with an optimized cage to reduce noise at low speeds |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 20081007 |