JPH0996315A - Resin holder for ball bearing - Google Patents
Resin holder for ball bearingInfo
- Publication number
- JPH0996315A JPH0996315A JP27628295A JP27628295A JPH0996315A JP H0996315 A JPH0996315 A JP H0996315A JP 27628295 A JP27628295 A JP 27628295A JP 27628295 A JP27628295 A JP 27628295A JP H0996315 A JPH0996315 A JP H0996315A
- Authority
- JP
- Japan
- Prior art keywords
- claws
- grease
- scattering prevention
- ball
- prevention wall
- 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.)
- Pending
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
- F16C33/412—Massive or moulded comb cages, e.g. snap ball cages
- F16C33/414—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages
- F16C33/416—Massive or moulded comb cages, e.g. snap ball cages formed as one-piece cages, i.e. monoblock comb cages made from plastic, e.g. injection moulded comb cages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
- F16C33/30—Parts of ball or roller bearings
- F16C33/66—Special parts or details in view of lubrication
- F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
- F16C33/6629—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、レーザビームプ
リンタ用軸受等、低トルクで低トルク変動が要求される
用途の軸受に適した玉軸受用樹脂保持器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a resin cage for ball bearings suitable for bearings for laser beam printers and the like, which are used in applications requiring low torque and low torque fluctuation.
【０００２】[0002]
【従来の技術】低トルク，低トルク変動が要求される場
合、グリースは樹脂保持器のグリース溜まり部に封入
し、グリースの基油で潤滑を行うようにされる。しか
し、遠心力でグリースが飛散し、トルク変動が大きくな
ることがある。このようなグリース飛散の防止を図った
保持器として、図２に示すようにグリース飛散防止壁５
１を隣合うポケット５２，５２の爪５３，５３間に連続
して設け、これら爪５３，５３間で形成されるグリース
溜まり部５４を蓋するものが提案されている（実開昭５
４−１６５６３９号公報）。2. Description of the Related Art When low torque and low torque fluctuation are required, grease is sealed in a grease reservoir of a resin holder and lubricated with a base oil of grease. However, the centrifugal force may cause the grease to scatter, resulting in a large torque fluctuation. As a cage designed to prevent such grease scattering, as shown in FIG.
It has been proposed that 1 is continuously provided between the claws 53, 53 of the adjacent pockets 52, 52, and the grease reservoir 54 formed between the claws 53, 53 is covered (actually published Japanese Utility Model Publication No. 5).
4-16539).
【０００３】[0003]
【発明が解決しようとする課題】しかし、このようにグ
リース飛散防止壁５１がポケット爪５３，５３間に連続
していると、軸受組立時にボールを爪５３をポケット５
２に入れるときに、爪５３が変形し難く、ボールを入れ
る作業が難しくなる。グリース飛散防止壁５１を両側の
爪５３，５３に達しない幅狭のものとすると、ボールの
組込時に爪５３が変形し難くなる問題は解消されるが、
グリース飛散防止壁５１と爪５３との間に生じた隙間に
より、グリースの飛散防止効果が低減する。However, if the grease scattering prevention wall 51 is continuous between the pocket claws 53, 53 in this manner, the ball claws 53 are inserted into the pockets 5 when the bearing is assembled.
The claws 53 are less likely to be deformed when the ball is put in the second slot, which makes it difficult to insert the ball. If the grease scattering prevention wall 51 has a narrow width that does not reach the claws 53, 53 on both sides, the problem that the claw 53 becomes difficult to be deformed when the ball is assembled is solved.
The gap between the grease scattering prevention wall 51 and the claw 53 reduces the grease scattering prevention effect.
【０００４】この発明の目的は、ボールの組込作業性を
低下させることなく、グリースの飛散防止効果を高めた
玉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 cage for ball bearings which has an improved effect of preventing the grease from scattering without lowering the workability of assembling the balls.
【０００５】[0005]
【課題を解決するための手段】この発明の玉軸受用樹脂
保持器は、環状体の一側面の円周方向複数箇所に、前記
円周方向に対面する一対の爪を設けて両爪の間にボール
を保持するポケットを形成した玉軸受用樹脂保持器にお
いて、前記環状体の外周部に、隣合うポケットの背を向
け合う爪の間で突出するグリース飛散防止壁を設け、こ
のグリース飛散防止壁を、両側縁の内壁面が両側の爪の
端面と対面する位置まで延びる幅としたものである。グ
リース飛散防止壁の両側縁と前記爪とは互いに分離させ
る。A ball bearing resin holder according to the present invention is provided with a pair of claws facing each other in the circumferential direction at a plurality of circumferential positions on one side surface of an annular body. In a resin cage for ball bearings in which a pocket for holding balls is formed, a grease scattering prevention wall protruding between the claws of the adjacent pockets facing each other is provided on the outer peripheral portion of the annular body to prevent the grease scattering. The wall has a width that extends to a position where the inner wall surfaces of both side edges face the end faces of the claws on both sides. Both side edges of the grease scattering prevention wall and the claw are separated from each other.
【０００６】この構成によると、隣合うポケットの背を
向け合う爪の間で形成されるグリース溜まりが、保持器
半径方向に見て、グリース飛散防止壁で全体を覆われ
る。そのため、グリースの飛散が生じ難く、グリースの
基油だけがボールと軌道輪の転走面へ供給され、低トル
クおよび低トルク変動となる。一方、グリース飛散防止
壁と両側の爪とは非連続としてあるため、グリース飛散
防止壁が爪の変形の抵抗とならず、ポケットへボールを
入れる作業の作業性が損なわれない。グリース飛散防止
壁の両側縁と前記爪の端面とは、一体化されずに分離し
ていれば良く、互いに接触させても良い。また、この分
離箇所にラビリンスシールとなる隙間を設けても良い。
このように隙間を設けてもグリースの飛散防止効果が保
持される。According to this structure, the grease reservoir formed between the claws of the adjacent pockets facing each other is covered with the grease scattering prevention wall when viewed in the radial direction of the cage. Therefore, the grease is unlikely to scatter, and only the base oil of the grease is supplied to the rolling surfaces of the balls and the bearing rings, resulting in low torque and low torque fluctuation. On the other hand, since the grease scattering prevention wall and the claws on both sides are discontinuous, the grease scattering prevention wall does not resist the deformation of the claws and the workability of inserting the ball into the pocket is not impaired. Both side edges of the grease scattering prevention wall and the end surfaces of the claws may be separated without being integrated, and may be in contact with each other. In addition, a gap that serves as a labyrinth seal may be provided at this separation location.
Even if such a gap is provided, the effect of preventing grease from scattering is maintained.
【０００７】[0007]
【発明の実施の形態】この発明の一実施例を図１に基づ
いて説明する。この玉軸受用樹脂保持器は、いわゆる冠
形の保持器であり、環状体１の一側面の円周方向複数箇
所に、前記円周方向に対面する一対の爪２，２を設け、
両爪２，２の間にボール（図示せず）を保持するポケッ
ト３を形成したものとする。ポケット３は、環状体１の
側面に形成された球面状の凹部３ａと、この凹部３ａか
ら続く両爪２，２の球面状の内壁面３ｂとで形成され
る。BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIG. This resin retainer for ball bearings is a so-called crown-shaped retainer, and a pair of claws 2, 2 facing each other in the circumferential direction are provided at a plurality of circumferential positions on one side surface of the annular body 1,
A pocket 3 for holding a ball (not shown) is formed between the claws 2, 2. The pocket 3 is formed by a spherical concave portion 3a formed on the side surface of the annular body 1 and spherical inner wall surfaces 3b of both the claws 2 and 2 which continue from the concave portion 3a.
【０００８】この保持器において、環状体１の外周部
に、隣合うポケット３，３の背を向け合う爪２，２の間
で突出するグリース飛散防止壁４を設ける。このグリー
ス飛散防止壁４は、両側縁の内壁面が両側の爪２，２の
端面２ａと対面する位置まで延びる幅とし、かつグリー
ス飛散防止壁４の両側縁と前記爪２の端面２ａとを、ラ
ビリンス隙間ｄの形成により分離状態とする。グリース
飛散防止壁４は、両側縁、すなわち爪２の端面２ａと対
面する部分を薄肉部とすることで、前記隙間ｄを形成し
てある。In this retainer, a grease scattering prevention wall 4 is provided on the outer peripheral portion of the annular body 1 so as to project between the claws 2 and 2 which face the backs of the adjacent pockets 3 and 3. The grease scattering prevention wall 4 has a width that extends to a position where the inner wall surfaces of both side edges face the end surfaces 2a of the claws 2, 2 on both sides, and both side edges of the grease scattering prevention wall 4 and the end surface 2a of the claw 2 are formed. , And the labyrinth gap d is formed so that the labyrinth gap d is separated. The grease scattering prevention wall 4 has the gap d formed by making both side edges, that is, a portion facing the end surface 2a of the claw 2, a thin portion.
【０００９】この構成によると、隣合うポケット３，３
の背を向け合う爪２，２の間で形成されるグリース溜ま
り６が、保持器半径方向に見て、グリース飛散防止壁４
で全体を覆われる。そのため、グリースの飛散が生じ難
く、グリースの基油だけがボールと軌道輪の転走面へ供
給され、低トルクおよび低トルク変動となる。一方、グ
リース飛散防止壁４と両側の爪２とは隙間ｄを介して分
離させたあるため、グリース飛散防止壁４が爪２の変形
の抵抗とならず、ポケット３へボールを入れる作業の作
業性が損なわれない。隙間ｄが生じていても、ラビリン
ス効果のため、グリースの飛散防止効果は十分に得られ
る。According to this construction, the adjacent pockets 3, 3 are adjacent to each other.
The grease reservoir 6 formed between the claws 2, 2 facing each other has a grease scattering prevention wall 4 when viewed in the radial direction of the cage.
The whole is covered with. Therefore, the grease is unlikely to scatter, and only the base oil of the grease is supplied to the rolling surfaces of the balls and the bearing rings, resulting in low torque and low torque fluctuation. On the other hand, since the grease splash prevention wall 4 and the claws 2 on both sides are separated by the gap d, the grease splash prevention wall 4 does not resist the deformation of the claws 2 and the work of inserting the ball into the pocket 3 is performed. The sex is not lost. Even if the gap d is formed, the effect of preventing grease from scattering is sufficiently obtained due to the labyrinth effect.
【００１０】[0010]
【発明の効果】この発明の玉軸受用樹脂保持器は、グリ
ース飛散防止壁の幅を、両側縁の内壁面が両側の爪の端
面と対面する位置まで延びる幅とし、かつグリース飛散
防止壁と前記爪とを分離状態としたため、ボールの組込
作業性を低下させることなく、グリースの飛散防止効果
を高めることができる。グリース飛散防止壁の両側縁と
爪の端面との間に隙間を設けても、そのラビリンスシー
ル効果でグリースの飛散防止効果が維持される。In the resin cage for ball bearings according to the present invention, the width of the grease scattering prevention wall is such that the inner wall surfaces of both side edges extend to positions where the inner wall surfaces of both edges face the end surfaces of the claws on both sides, and the grease scattering prevention wall is formed. Since the claws are separated from each other, the effect of preventing the grease from scattering can be enhanced without lowering the workability of assembling the balls. Even if a gap is provided between both side edges of the grease scattering prevention wall and the end surface of the pawl, the labyrinth sealing effect maintains the grease scattering prevention effect.
【図１】（Ａ）はこの発明の一実施形態にかかる玉軸受
用樹脂保持器の部分斜視図、（Ｂ）はその部分平面図で
ある。FIG. 1A is a partial perspective view of a resin cage for ball bearings according to an embodiment of the present invention, and FIG. 1B is a partial plan view thereof.
【図２】従来例の部分斜視図である。FIG. 2 is a partial perspective view of a conventional example.
１…環状体、２…爪、２ａ…端面、３…ポケット、４…
グリース飛散防止壁、６…グリース溜まり、ｄ…隙間1 ... Annular body, 2 ... Claw, 2a ... End surface, 3 ... Pocket, 4 ...
Grease scattering prevention wall, 6 ... Grease reservoir, d ... Gap
Claims (2)
前記円周方向に対面する一対の爪を設けて両爪の間にボ
ールを保持するポケットを形成した玉軸受用樹脂保持器
において、前記環状体の外周部に、隣合うポケットの背
を向け合う爪の間で突出するグリース飛散防止壁を設
け、このグリース飛散防止壁を、両側縁の内壁面が両側
の爪の端面と対面する位置まで延びる幅とし、前記グリ
ース飛散防止壁の両側縁と前記爪の端面とを互いに分離
させた玉軸受用樹脂保持器。1. At a plurality of circumferential positions on one side of the annular body,
In a resin cage for ball bearings, wherein a pair of pawls facing each other in the circumferential direction are provided, and a pocket for holding a ball is formed between the pawls, in the outer peripheral portion of the annular body, the backs of adjacent pockets are faced A grease scattering prevention wall protruding between the claws is provided, and the width of the grease scattering prevention wall extends to a position where the inner wall surfaces of both side edges face the end faces of the claws on both sides. Resin retainer for ball bearings where the end faces of the claws are separated from each other.
端面との間にラビリンスシールとなる隙間を設けた請求
項１記載の玉軸受用樹脂保持器。2. The resin retainer for a ball bearing according to claim 1, wherein a gap serving as a labyrinth seal is provided between both side edges of the grease scattering prevention wall and an end surface of the claw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27628295A JPH0996315A (en) | 1995-09-29 | 1995-09-29 | Resin holder for ball bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27628295A JPH0996315A (en) | 1995-09-29 | 1995-09-29 | Resin holder for ball bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0996315A true JPH0996315A (en) | 1997-04-08 |
Family
ID=17567279
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27628295A Pending JPH0996315A (en) | 1995-09-29 | 1995-09-29 | Resin holder for ball bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0996315A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2623801A4 (en) * | 2010-09-28 | 2017-01-25 | NTN Corporation | Retainer for ball bearing, and ball bearing |
| WO2019027011A1 (en) * | 2017-08-04 | 2019-02-07 | Ntn株式会社 | Ball bearing |
-
1995
- 1995-09-29 JP JP27628295A patent/JPH0996315A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2623801A4 (en) * | 2010-09-28 | 2017-01-25 | NTN Corporation | Retainer for ball bearing, and ball bearing |
| WO2019027011A1 (en) * | 2017-08-04 | 2019-02-07 | Ntn株式会社 | Ball bearing |
| JP2019031990A (en) * | 2017-08-04 | 2019-02-28 | Ntn株式会社 | Ball bearing |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Effective date: 20040406 Free format text: JAPANESE INTERMEDIATE CODE: A02 |