JP2611393B2 - Solid lubricated ball bearings - Google Patents
Solid lubricated ball bearingsInfo
- Publication number
- JP2611393B2 JP2611393B2 JP63298408A JP29840888A JP2611393B2 JP 2611393 B2 JP2611393 B2 JP 2611393B2 JP 63298408 A JP63298408 A JP 63298408A JP 29840888 A JP29840888 A JP 29840888A JP 2611393 B2 JP2611393 B2 JP 2611393B2
- Authority
- JP
- Japan
- Prior art keywords
- cage
- ball
- divided
- pieces
- retainer
- 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.)
- Expired - Fee Related
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
- F16C33/3818—Ball cages formed of unconnected segments
-
- 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
- F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
- F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Rolling Contact Bearings (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） この発明は、特に高真空、高速、高温条件下で、しか
も油やグリースなどによる潤滑が不可能なＸ線管用回転
陽極の支持軸受などに使用されて、有効に機能する固体
潤滑の玉軸受に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial application field) The present invention is particularly applicable to a bearing for a rotating anode for an X-ray tube, which cannot be lubricated with oil or grease under high vacuum, high speed and high temperature conditions. The present invention relates to a solid lubricated ball bearing which is used and functions effectively.
（従来技術） 従来より知られているこの種の用途の固体潤滑の玉軸
受として、例えば、特開昭62−270826号公報に開示され
ているように、軸受の外輪溝、内輪溝および玉に軟金属
の被膜を有し、かつ、保持器に固体潤滑剤を有するもの
が知られている。(Prior Art) Conventionally known solid lubricated ball bearings for this type of application include, as disclosed in Japanese Patent Application Laid-Open No. 62-270826, an outer ring groove, an inner ring groove and a ball of a bearing. It is known to have a soft metal coating and a cage having a solid lubricant.
（発明が解決しようとする課題） しかしながら、上記従来技術の軸受のように、固定潤
滑剤の被膜で潤滑しているので、油やグリース潤滑に比
べて、玉と外内輪溝との間のすべり摩擦係数が大きく
（例えば、油、グリースは0.05、銀は0.4、鉛は0.2
5）、かつ、固体潤滑剤は外輪、内輪の溝表面に均一に
着かず、偏在して外輪、内輪の溝表面に微小な凹凸を生
ずるために、回転中この溝表面を転がる玉は円周方向１
回転中に公転速度のバラツキを発生する。(Problems to be Solved by the Invention) However, since the bearing is lubricated with a film of a fixed lubricant as in the above-mentioned prior art bearing, the slip between the ball and the outer and inner ring grooves is smaller than that of oil or grease lubrication. High coefficient of friction (for example, 0.05 for oil and grease, 0.4 for silver, 0.2 for lead)
5) In addition, since solid lubricant does not uniformly reach the groove surfaces of the outer ring and the inner ring, and is unevenly distributed, causing minute irregularities on the groove surfaces of the outer ring and the inner ring, the balls rolling on the groove surfaces during rotation are circumferential. Direction 1
The revolution speed varies during rotation.
その結果、保持器の円周方向に引張りまたは圧縮の過
大な力が作用して、保持器破損の危険性がある。保持器
が破損した場合、破損した保持器破片を外内輪溝と玉と
の間にかみ込んで軸受が回転しないという問題があっ
た。As a result, an excessive force of tension or compression acts in the circumferential direction of the cage, and there is a risk of the cage being damaged. When the cage is broken, there is a problem that the broken cage piece is caught between the outer and inner race grooves and the ball, and the bearing does not rotate.
よって、この発明は高真空、高温、高速回転の条件下
で使用される固体潤滑の玉軸受について、玉と保持器ポ
ケットにおけるすべり面の摩擦の低減と保持器の破損防
止による軸受の耐久性の向上を図ることを目的としてい
る。Therefore, the present invention relates to a solid lubricated ball bearing used under conditions of high vacuum, high temperature, and high speed rotation, which reduces the friction between the ball and the sliding surface of the cage pocket and prevents the cage from being damaged. It aims to improve.
（課題を解決するための手段） 外輪の軌道溝と内輪の軌道溝との間に玉を有し、か
つ、前記玉が保持器によって保持案内されてなる固体潤
滑剤を使用する玉軸受において、前記保持器が円周上複
数個に分割され、該分割された保持器片は少なくとも１
つ以上の玉を完全に保持案内している。また前記保持器
の分割位置は玉を保持案内するポケット部としている。
さらに円周上複数個に分割された前記保持器片間のすき
まΔｈは、保持器ポケット径r1と玉径r2との差のすきま
Δｒよりも大きく構成したのものである。(Means for Solving the Problems) In a ball bearing using a solid lubricant having a ball between a raceway groove of an outer ring and a raceway groove of an inner ring, and wherein the ball is held and guided by a retainer, The retainer is divided into a plurality of pieces on a circumference, and the divided retainer pieces are at least one.
One or more balls are completely held and guided. Further, the dividing position of the cage is a pocket portion for holding and guiding the ball.
Further, the retainer pieces of the gap Δh divided into circumferentially plurality are those of larger construction than the gap Δr of the difference between the cage pocket diameter r 1 and ball diameter r 2.
（作用） かくして、この発明の固体潤滑の玉軸受にあっては、
保持器を円周上複数個に分割することによって、保持器
片は、保持器ポケット内で完全に保持する玉の数が玉軸
受の全玉数の約1/2より少ないので、公転速度の異なる
玉を保持する確率が小さく、保持器片の円周方向に作用
する力が小さくなる。(Operation) Thus, in the solid lubricated ball bearing of the present invention,
By dividing the cage into a plurality of pieces on the circumference, the number of balls to be completely held in the cage pocket is less than about 1/2 of the total number of ball bearings in the cage piece. The probability of holding different balls is small, and the force acting in the circumferential direction of the retainer piece is reduced.
また、保持器の分割位置は柱のところではなく、保持
器ポケット部で分割されているので、保持器の強度は分
割前の保持器とほぼ同程度に保つことができる。In addition, since the cage is divided at the cage pocket portion, not at the column, the strength of the cage can be kept substantially the same as that of the cage before the division.
また、分割された保持器片間のすきまΔｈ（Δｈ＞Δ
ｒ）により、円周方向に保持器片が動き得るすきまを有
することになるので、分解された各保持器片の速度差を
吸収でき、保持器の円周方向に作用する力が軽減され
る。Also, the clearance Δh (Δh> Δ
According to r), since there is a gap in which the retainer pieces can move in the circumferential direction, the speed difference between the disassembled retainer pieces can be absorbed, and the force acting on the retainer in the circumferential direction can be reduced. .
（実施例） 次にこの発明を第１図および第２図に示す固体潤滑の
玉軸受の一実施例について説明すると、図中、１は外
輪、２は内輪、3a,3b,・・・3iは玉、４は保持器を示
す。前記保持器４は円周上3a,3b,3gの玉のところの保持
器ポケット部でそれぞれ分割されて組み込まれている。
分割された３つの保持器片41,42,43は玉3b,3cと、3e,3
f、そして3h,3iの各２個の玉をそれぞれ完全に保持して
いる。(Embodiment) Next, the present invention will be described with reference to an embodiment of a solid lubricated ball bearing shown in FIGS. 1 and 2. In the drawings, 1 is an outer ring, 2 is an inner ring, 3a, 3b,. Indicates a ball, and 4 indicates a retainer. The retainer 4 is divided and incorporated at the retainer pocket portions at the balls 3a, 3b and 3g on the circumference.
The three retainer pieces 41, 42, 43 divided into balls 3b, 3c and 3e, 3
f, and 3h, 3i each completely holds two balls.
固体潤滑剤は外輪、内輪の溝表面11と21にまた玉表面
にも31のように被覆されている。The solid lubricant is coated on the groove surfaces 11 and 21 of the outer ring and the inner ring as well as on the ball surface as 31.
保持器材質は固体潤滑剤を主成分としている。 The cage material is mainly composed of a solid lubricant.
従来の玉軸受の保持器は3a,3b・・・3iの９個の玉を
保持するのに対して、この発明の分割された保持器片4
1,42,43は各々２個の玉を保持している。While the conventional ball bearing cage holds nine balls 3a, 3b,... 3i, the cage member 4 of the present invention is divided.
1, 42 and 43 each hold two balls.
この上記の状態で円周方向１回転中に玉の公転速度に
変化を生ずる例を考える。今一定の玉の公転速度をＵと
したとき、一定の玉の公転速度Ｕに対して、仮に玉3eが
ΔＵに進み、玉31がΔＵ遅れるとすると、従来の保持器
では、速度差は２ΔＵとなり、保持器の円周方向に働く
ひずみ量は大きくなる。この発明の実施例では、玉3eと
3iは分離された保持器片42と43とに保持されているから
どちらの保持器片42,43においても玉3e,3iの公転速度Ｕ
に対する速度差はΔＵにとどまり保持器片42,43の円周
方向に働くひずみ量は小さくなる。従って玉の保持器に
作用する力は小さくなる。Consider an example in which the revolution speed of the ball changes during one rotation in the circumferential direction in this state. Assuming now that the revolving speed of a certain ball is U, if the ball 3e advances to ΔU and the ball 31 delays by ΔU with respect to the certain ball revolving speed U, the speed difference is 2ΔU in the conventional cage. And the amount of strain acting in the circumferential direction of the cage becomes large. In the embodiment of the present invention, the ball 3e and
3i is held by the separated retainer pieces 42 and 43, so that the revolving speed U of the balls 3e and 3i in both the retainer pieces 42 and 43.
, The speed difference acting on the retainer pieces 42, 43 in the circumferential direction is reduced. Therefore, the force acting on the ball cage is reduced.
また一定の速度で公転する保持器片41に比較して玉3e
によって速く公転する保持器片42と玉31によって遅く公
転する保持器片43は玉3gのところで保持器が分割されて
いる。Also, compared to the retainer piece 41 which revolves at a constant speed, the ball 3e
The retainer piece 42 that revolves quickly by the ball 31 and the retainer piece 43 that revolves slowly by the ball 31 are divided at the ball 3g.
分割された保持器片42と43との保持器間すきまΔｈ
は、保持器ポケット径r1と玉径r2との差で示される保持
器ポケットすきまΔｒより大きくなっているので分割さ
れた保持器片42と43とは相互に接触することはない。よ
って円周上複数個に分割された保持器片は他の分割され
た保持器片から円周方向の力を受けることがなくなる。Cage clearance Δh between divided cage pieces 42 and 43
It is not contact with each other and the cage pocket diameter r 1 and ball diameter r 2 retainer piece 42 which is divided so is larger than the cage pocket clearance Δr represented by the difference between the 43. Therefore, the retainer piece divided into a plurality of pieces on the circumference does not receive the circumferential force from the other divided retainer pieces.
従って保持器に作用する円周方向の力が小さくなるこ
とにより保持器の破損がなくなる。また玉の保持器ポケ
ット面へ作用する回転方向の力が小さくなるので、玉と
保持器ポケットのすべり面の摩擦は低減する。Therefore, the cage is not broken due to a small circumferential force acting on the cage. Also, since the rotational force acting on the cage pocket surface of the ball is reduced, the friction between the ball and the sliding surface of the cage pocket is reduced.
第２図は分割された保持器片の１側面を示している。
分割の位置は柱のところではなく保持器ポケット部で分
割されているので、分割された保持器の強度は分割前の
保持器とほぼ同程度に保つことができる。FIG. 2 shows one side of the split retainer piece.
Since the position of the division is divided not by the pillar but by the cage pocket portion, the strength of the divided cage can be kept substantially the same as that of the cage before the division.
なお実施例では保持器の分割数を円周上３箇所にした
が、分割数は円周上２箇所以上でよく、この保持器の分
割数は軸受の玉数によって任意に決り、分割された保持
器片は少なくとも１個以上の玉を完全に保持案内してい
ればよい。Although the number of divisions of the cage is set to three places on the circumference in the embodiment, the number of divisions may be two or more on the circumference. The retainer piece only needs to completely hold and guide at least one or more balls.
またこの発明は実施例の保持器が内輪案内形成である
が、外輪案内形式及び玉案内形式のどちらにも同様に適
用することができる。In the present invention, the cage of the embodiment is formed with an inner ring guide, but the present invention can be similarly applied to both the outer ring guide type and the ball guide type.
（発明の効果） この発明によれば、上記で述べた如く次の効果があ
る。即ち、固体潤滑の玉軸受において、保持器が円周上
複数個に分割されているので玉の公転速度に変化を生じ
ても、保持器片は公転速度の異なる玉を保持する確率が
減り、保持器への円周方向に作用する力が小さくなる。
従って、保持器の破損がなく、破損により生ずる保持器
破片の発生とそのかみ込みによる摩擦の増大を防止す
る。また保持器の分割はポケット部で分割しているので
保持器の強度は、分割前の保持器とほぼ同程度の強度を
有することができる。また分割された保持器片間のすき
まは、保持器ポケット径と玉径との差のすきまより大き
くなっているので、各保持器片は相互に非接触であるこ
とより玉の保持器ポケット面へ作用する回転方向の力を
小さくして、玉と保持器ポケットのすべり面の摩擦を低
減する。(Effects of the Invention) According to the present invention, the following effects are obtained as described above. That is, in a solid lubricated ball bearing, even if a change occurs in the revolving speed of the ball because the cage is divided into a plurality of pieces on the circumference, the probability that the retainer piece holds a ball having a different revolving speed is reduced, The circumferential force acting on the retainer is reduced.
Therefore, the cage is not damaged, and the generation of cage fragments caused by the damage and the increase in friction due to the bite are prevented. Further, since the cage is divided at the pocket portion, the strength of the cage can be substantially the same as that of the cage before the division. Also, the clearance between the divided cage pieces is larger than the gap between the cage pocket diameter and the ball diameter. The friction between the ball and the sliding surface of the cage pocket is reduced by reducing the rotational force acting on the ball.
以上より固定潤滑剤を使用する玉軸受の耐久性の向上
を図ることができる。As described above, the durability of the ball bearing using the fixed lubricant can be improved.
第１図はこの発明の一実施例に係る固体潤滑の玉軸受の
平面図、第２図は分割された保持器片の側面図。 〔符号の説明〕 １……外輪 ２……内輪 3a,3b……3i……玉 ４……保持器 41,42,43……分割された保持器片 Δｈ……分割された保持器片間のすきま r1……保持器のポケット径 r2……玉径 11,21,31……固体潤滑剤FIG. 1 is a plan view of a solid lubricated ball bearing according to an embodiment of the present invention, and FIG. 2 is a side view of a divided cage piece. [Explanation of Symbols] 1 ... Outer ring 2 ... Inner ring 3a, 3b ... 3i ... Ball 4 ... Cage 41,42,43 ... Cage piece divided Δh… Cage piece divided Clearance r 1 …… Cage pocket diameter r 2 … Ball diameter 11,21,31 …… Solid lubricant
Claims (1)
有し、かつ、前記玉が保持器によって保持案内されてな
る固体潤滑剤を使用する玉軸受において、前記保持器が
円周上複数個に分割され、該分割された保持器片は少な
くとも１つ以上の玉を完全に保持案内し、前記保持器の
分割位置は玉を保持案内するポケット部とし、円周上複
数個に分割された保持器片間のすきまΔｈは、保持器ポ
ケット径r1と玉径r2との差のすきまΔｒよりも大きくな
っていることを特徴とする固体潤滑の玉軸受。1. A ball bearing using a solid lubricant having a ball between a raceway groove of an outer race and a raceway groove of an inner race, and wherein the ball is held and guided by a cage. The cage is divided into a plurality of pieces on the circumference, and the divided retainer pieces completely hold and guide at least one ball, and the divided position of the cage is a pocket portion for holding and guiding the balls. clearance Δh of retention unit pieces split into pieces, cage ball bearing solid lubricant, characterized in that is larger than the gap Δr of the difference between the pocket diameter r 1 and ball diameter r 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63298408A JP2611393B2 (en) | 1988-11-28 | 1988-11-28 | Solid lubricated ball bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63298408A JP2611393B2 (en) | 1988-11-28 | 1988-11-28 | Solid lubricated ball bearings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02146314A JPH02146314A (en) | 1990-06-05 |
| JP2611393B2 true JP2611393B2 (en) | 1997-05-21 |
Family
ID=17859325
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63298408A Expired - Fee Related JP2611393B2 (en) | 1988-11-28 | 1988-11-28 | Solid lubricated ball bearings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2611393B2 (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08173453A (en) * | 1994-12-27 | 1996-07-09 | Ntn Corp | Rolling bearing device for handpiece |
| EP2388489B1 (en) | 2005-12-16 | 2014-12-17 | NTN Corporation | Roller bearing, main shaft support structure of wind-power generator, intermediate element and retainer segment |
| JP5211963B2 (en) * | 2008-03-03 | 2013-06-12 | 日本精工株式会社 | Ball bearing, conveyor, vacuum processing equipment |
| JP2009228682A (en) * | 2008-03-19 | 2009-10-08 | Ntn Corp | Divided type retainer for rolling bearing, and rolling bearing with divided type retainer |
| JP5088208B2 (en) * | 2008-03-31 | 2012-12-05 | 株式会社ジェイテクト | Manufacturing method of rolling bearing device for wheel |
| JP5724275B2 (en) * | 2010-09-29 | 2015-05-27 | 日本精工株式会社 | Rolling bearing |
| JP2020118240A (en) * | 2019-01-25 | 2020-08-06 | Ntn株式会社 | Solid lubrication roller bearing |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55129657A (en) * | 1979-03-29 | 1980-10-07 | Toyota Motor Corp | Roller bearing |
| JPS5813230A (en) * | 1981-07-14 | 1983-01-25 | Ntn Toyo Bearing Co Ltd | Flexible retainer for rolling bearing |
| JPS62270826A (en) * | 1986-01-09 | 1987-11-25 | Nippon Seiko Kk | Rolling bearing |
| JPS63140118A (en) * | 1986-12-02 | 1988-06-11 | Kao Corp | Ball retainer for rolling bearing and manufacture thereof |
-
1988
- 1988-11-28 JP JP63298408A patent/JP2611393B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02146314A (en) | 1990-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |