JPH0626741Y2 - Ceramic bearings - Google Patents
Ceramic bearingsInfo
- Publication number
- JPH0626741Y2 JPH0626741Y2 JP1989052765U JP5276589U JPH0626741Y2 JP H0626741 Y2 JPH0626741 Y2 JP H0626741Y2 JP 1989052765 U JP1989052765 U JP 1989052765U JP 5276589 U JP5276589 U JP 5276589U JP H0626741 Y2 JPH0626741 Y2 JP H0626741Y2
- Authority
- JP
- Japan
- Prior art keywords
- ceramic
- bearing
- outer plates
- rolling
- raceway
- 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
Description
【考案の詳細な説明】 ［産業上の利用分野］ 本考案は、レース（軌道）の転動面をセラミック化した
セラミック軸受に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a ceramic bearing in which the rolling surface of a race (raceway) is made ceramic.
［従来の技術］ 従来より、第２図に示すように、内輪（インナーレー
ス）１００、外輪（アウターレース）２００、および転
動体３００を全てセラミックで形成したベアリングＢが
提案されている（例えば、特開昭４８−９９５３８号公
報）。[Prior Art] Conventionally, as shown in FIG. 2, a bearing B in which an inner race (inner race) 100, an outer race (outer race) 200, and a rolling element 300 are all made of ceramic has been proposed (for example, JP-A-48-99538).
［考案が解決しようとする課題］ しかるに、上記技術ではつぎのような欠点がある。[Problems to be Solved by the Invention] However, the above technique has the following drawbacks.
(1)セラミックは金属に比べ脆性であり、弾性変形をほ
とんどしないため、セラミック製レースを金属部材に嵌
合する場合、セラミック製レースの破損防止に非常に注
意を払う必要がある。特に、圧入による外嵌めの場合
は、レースに引っ張り応力がかかるため、耐久性に問題
を生じ易い。(1) Ceramics are more brittle than metals and undergo almost no elastic deformation. Therefore, when fitting ceramic races to metal members, great care must be taken to prevent damage to the ceramic races. In particular, in the case of external fitting by press fitting, tensile stress is applied to the race, so that a problem is likely to occur in durability.
(2)セラミックは一般に金属に比べ熱膨張係数が小さい
ので、上記レースを回転軸に外嵌めする場合、通常の鋼
製の軸受で行われているような締め代による固定を行う
と、使用中、温度が高くなった時、熱膨張差により引っ
張り応力が大きくなる。このため、引っ張りに弱いセラ
ミック製レースは破壊し易い。(2) Ceramics generally have a smaller coefficient of thermal expansion than metals, so when fitting the above race to the rotating shaft, fixing it with a tightening allowance as is done with ordinary steel bearings, it will be in use. When the temperature rises, the tensile stress increases due to the difference in thermal expansion. Therefore, the ceramic lace, which is weak against pulling, is easily broken.
本考案の目的は、金属部材への装着が容易に行え、か
つ、使用環境温度が変化しても不具合が生じ難い、セラ
ミック軸受の提供にある。An object of the present invention is to provide a ceramic bearing that can be easily mounted on a metal member and that is unlikely to cause a problem even when the operating environment temperature changes.
［課題を解決するための手段］ 上記目的達成のため、本考案は、対向して配される１対
の金属製外板の内面にセラミック製軌道面板をろう付け
してなるレース間に、複数個の転動体を介在させたセラ
ミック軸受であって、前記セラミック軸受はスラスト軸
受であり、前記１対の金属製外板は、円環平板状を呈す
るとともに、装着時に嵌め込み面となる側に筒状部を有
し、前記セラミック製軌道面板と前記筒状部の壁面との
間に隙間を形成した。[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of metal plates between the races which are brazed with ceramic raceway plates on the inner surfaces of a pair of metal outer plates facing each other. A ceramic bearing in which individual rolling elements are interposed, the ceramic bearing is a thrust bearing, and the pair of metal outer plates have an annular flat plate shape, and a cylinder is provided on a side that is a fitting surface when mounted. And a gap is formed between the ceramic raceway plate and the wall surface of the tubular portion.
［作用および考案の効果］ 本考案のセラミック軸受は、つぎの作用および効果を奏
する。[Operation and Effect of Invention] The ceramic bearing of the present invention has the following operations and effects.
対向して配される１対の金属製外板の内面にセラミック
製軌道面板をろう付けしたレース間に複数個の転動体を
介在させている。よって、回転軸やハウジング等の金属
部材に、セラミック軸受を装着する場合、嵌合面は金属
どうしとなる。このため、圧入による嵌め合いの場合、
金属製レースを有する軸受とほぼ同様に取り扱うことが
できる。A plurality of rolling elements are interposed between races in which a ceramic raceway surface plate is brazed to the inner surfaces of a pair of metal outer plates arranged to face each other. Therefore, when the ceramic bearing is mounted on a metal member such as a rotating shaft or a housing, the fitting surfaces are metal. Therefore, in the case of fitting by press fitting,
It can be handled much like a bearing with a metal race.
回転軸やハウジング等の金属部材に嵌まる外板は金属で
あり、これらの熱膨張係数は近似している。このため、
使用時、セラミック軸受が温度変化を受けても、嵌合が
緩んだり、圧入代の増加を起こしたりすることはほとん
どない。The outer plates fitted to the metal members such as the rotating shaft and the housing are made of metal, and their thermal expansion coefficients are similar. For this reason,
In use, even if the ceramic bearing is subjected to temperature changes, the fitting is rarely loosened and the press-fitting margin is not increased.
又、各レースは、装着時に嵌め込み面となる側に金属製
筒状部を有し、かつ、軌道面板と筒状部壁との間には隙
間が形成されている。このため、セラミック軸受を回転
軸やハウジング等の金属部材に圧入して装着する際、金
属製外板の変形をこの隙間により吸収でき、セラミック
製軌道面板に応力がかからず破損ができる。Further, each race has a metal cylindrical portion on the side that becomes a fitting surface when mounted, and a gap is formed between the raceway face plate and the cylindrical portion wall. Therefore, when the ceramic bearing is press-fitted and mounted on a metal member such as a rotary shaft or a housing, the deformation of the metal outer plate can be absorbed by this gap, and the ceramic raceway plate can be damaged without being stressed.
［実施例］ つぎに、本考案の一実施例を第１図に基づき説明する。[Embodiment] Next, an embodiment of the present invention will be described with reference to FIG.
第１図に示すごとく、本実施例のスラスト軸受Ａは、回
転軸４００およびハウジング５００へ装着される外板
１、２、および該外板１、２に銀ろう付け３により接合
される転動軌道４、５とを備えるレース６、７と、前記
転動軌道４、５間に配される複数個の球８とからなる。As shown in FIG. 1, the thrust bearing A according to the present embodiment has outer plates 1 and 2 mounted on a rotary shaft 400 and a housing 500, and a rolling member joined to the outer plates 1 and 2 by silver brazing 3. It consists of races 6 and 7 having raceways 4 and 5, and a plurality of balls 8 arranged between the rolling raceways 4 and 5.
外板１、２（円環平板状）はＳＮＣＭ６３０（ニッケル
・クロム・モリブデン鋼）で形成されている。この外板
１、２は、厚肉円筒に円環状のスペースを削成すること
により、軌道装着溝１１、２１を形成している。また、
回転軸４００およびハウジング５００と外板１、２との
嵌合面は筒状となっている。The outer plates 1 and 2 (annular flat plate shape) are made of SNCM630 (nickel / chromium / molybdenum steel). The outer plates 1 and 2 form track mounting grooves 11 and 21 by cutting an annular space in a thick cylinder. Also,
The fitting surfaces of the rotating shaft 400 and the housing 500 and the outer plates 1 and 2 are cylindrical.
転動軌道４、５は、窒化珪素を主成分とするセラミック
焼結体で形成され、前記球８が転動する円弧状の溝４
１、５１を周設している。なお、本実施例では軌道装着
溝１１、２１の垂直壁１２、２２と転動軌道４、５との
間に隙間１３、２３が設けられている。The rolling tracks 4 and 5 are formed of a ceramic sintered body containing silicon nitride as a main component, and the arc-shaped groove 4 on which the sphere 8 rolls.
Around 1,51. In this embodiment, gaps 13, 23 are provided between the vertical walls 12, 22 of the raceway mounting grooves 11, 21 and the rolling raceways 4, 5.
球８は、前記転動軌道４、５と同じセラミック焼結体で
形成されている。また、球８はリテーナ（図示せず）に
より保持されている。The sphere 8 is formed of the same ceramic sintered body as the rolling tracks 4 and 5. The ball 8 is held by a retainer (not shown).
つぎに、スラスト軸受Ａの製造方法を説明する。Next, a method of manufacturing the thrust bearing A will be described.
(1)９０重量％の窒化珪素粉末にＡｌ２Ｏ３−Ｙ２Ｏ３
系の焼結助剤を加え、素地調整を行い、金型プレスによ
る成形後、窒素雰囲気中で焼成し、研磨加工を行って転
動軌道４、５および球８を製造する。(1) 90% by weight of silicon nitride powder on Al 2 O 3 —Y 2 O 3
A system sintering aid is added to adjust the base material, and after molding by a die press, firing is performed in a nitrogen atmosphere, and polishing is performed to manufacture the rolling tracks 4 and 5 and the balls 8.
(2)ＳＮＣＭ６３０材料に削り加工を施して軌道装着溝
１１、２１を形成する。(2) The SNCM 630 material is ground to form the orbit mounting grooves 11 and 21.
(3)外板１と、転動軌道４とをＩｎ−Ｃｕ−Ａｇ−Ｔｉ
系のろう材を用い、７９５℃で３０分間、真空雰囲気中
で各々接合する。転動軌道５も同様に外板２に接合す
る。(3) The outer plate 1 and the rolling raceway 4 are made of In-Cu-Ag-Ti.
Bonding is performed in a vacuum atmosphere at 795 ° C. for 30 minutes using a system brazing material. The rolling track 5 is similarly joined to the outer plate 2.
(4)一体化されたレース６、７に仕上げ加工を施す。(4) Finish the integrated races 6 and 7.
(5)球８を取付け、完成したスラスト軸受Ａを回転軸４
００およびハウジング５００に圧入する（圧入部の外板
１、２の金属硬度はＨRC４０以上である）。(5) Attach the ball 8 and attach the completed thrust bearing A to the rotary shaft 4
00 and the housing 500 (the metal hardness of the outer plates 1 and 2 of the press-fitting portion is H RC 40 or more).
つぎに、本実施例の、スラスト軸受Ａの作用効果につい
て述べる。Next, the function and effect of the thrust bearing A of this embodiment will be described.
（あ）回転軸４００およびハウジング５００へ装着する
外板１、２はＳＮＣＭ６３０（ニッケル・クロム・モリ
ブデン鋼）で形成されている。このため、スラスト軸受
Ａは軸受の転動軌道（耐磨耗性が要求される）がセラミ
ックであるという長所（磨耗し難い）を有し、装着性は
通常の鋼製の軸受と変わらない。(A) The outer plates 1 and 2 attached to the rotary shaft 400 and the housing 500 are made of SNCM630 (nickel / chromium / molybdenum steel). Therefore, the thrust bearing A has an advantage that the rolling raceway of the bearing (which is required to have wear resistance) is ceramic (hard to wear), and the mountability is the same as that of a normal steel bearing.
（い）使用時、スラスト軸受Ａの温度が上昇しても、外
板１、２と、回転軸４００およびハウジング５００との
嵌合は金属どうしなので、略同一的に膨張し（熱膨張係
数が近似していることによる）、緩んだり、圧入代が増
加するようなことは極めて起こり難い。(Ii) During use, even if the temperature of the thrust bearing A rises, since the outer plates 1 and 2 and the rotating shaft 400 and the housing 500 are fitted to each other by metal, they expand substantially in the same manner (the coefficient of thermal expansion is It is very unlikely that it will loosen or the press-fitting margin will increase due to the approximation.
（う）球８および転動軌道４、５は、外板２、５を介し
て回転軸４００およびハウジング５００に取付けられて
いる。このため、チッピング（微細な欠損）に対する配
慮をしなくても良い。つまり、スラスト軸受Ａは、鋼製
のベアリングと同様に取り扱うことができる。(U) The ball 8 and the rolling tracks 4 and 5 are attached to the rotary shaft 400 and the housing 500 via the outer plates 2 and 5. Therefore, it is not necessary to consider chipping (fine defects). That is, the thrust bearing A can be handled like a steel bearing.
（え）軌道装着溝１１、２１の垂直壁１２、２２と転動
軌道４、５との間に隙間１３、２３が設けられている。
このため、スラスト軸受Ａを回転軸４００およびハウジ
ング５００に圧入する際、外板１、２の内方向への変形
を隙間１３、２３により吸収し、セラミック製の転動軌
道４、５に応力がかかるのを防止している。(E) Gaps 13, 23 are provided between the vertical walls 12, 22 of the raceway mounting grooves 11, 21 and the rolling raceways 4, 5.
Therefore, when the thrust bearing A is press-fitted into the rotary shaft 400 and the housing 500, the inward deformation of the outer plates 1 and 2 is absorbed by the gaps 13 and 23, and stress is applied to the ceramic rolling raceways 4 and 5. This is prevented.
本考案は上記実施例以外につぎの実施態様を含む。The present invention includes the following embodiments in addition to the above embodiments.
ａ．ろう付けのろう材は銀ろう以外に、黄銅ろう、洋銀
ろう、金ろう、耐熱合金ろう、鉄ろう、アルミニウムろ
う等を用いても良い。a. As the brazing material for brazing, other than silver brazing, brass brazing, nickel silver brazing, gold brazing, heat-resistant alloy brazing, iron brazing, aluminum brazing or the like may be used.
ｂ．転動体の形状は球以外にコロでも良い。b. The shape of the rolling element may be a roller instead of a sphere.
ｃ．回転軸４００およびハウジング５００の配設方向は
任意である。c. The arrangement directions of the rotating shaft 400 and the housing 500 are arbitrary.
ｄ．球８は、他のセラミック材料（炭化硼素、硼化チタ
ン−炭化珪素、窒化アルミニウム、アルミナ等）や金属
材料（鋼、超硬合金等）でも良い。d. The sphere 8 may be made of another ceramic material (boron carbide, titanium boride-silicon carbide, aluminum nitride, alumina, etc.) or metal material (steel, cemented carbide, etc.).
【図面の簡単な説明】 第１図は本考案の一実施例であるセラミック軸受の部分
断面図である。 第２図は従来の軸受（ベアリング）の構成図である。 図中 １、２……外板（金属製外板）、３……銀ろう付
け、４、５……転動軌道（セラミック製軌道面板）、
６、７……レース、８……球（転動体）、１３、２３…
…隙間、Ａ……スラスト軸受（セラミック軸受）BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partial sectional view of a ceramic bearing according to an embodiment of the present invention. FIG. 2 is a block diagram of a conventional bearing. In the figure, 1 ... 2 ... Outer plate (metal outer plate), 3 ... Silver brazing, 4,5 ... Rolling raceway (ceramic raceway face plate),
6, 7 ... Race, 8 ... Ball (rolling element), 13, 23 ...
… Gap, A …… Thrust bearing (ceramic bearing)
Claims (1)
にセラミック製軌道面板をろう付けしてなるレース間
に、複数個の転動体を介在させたセラミック軸受であっ
て、 前記セラミック軸受はスラスト軸受であり、 前記１対の金属製外板は、円環平板状を呈するととも
に、装着時に嵌め込み面となる側に筒状部を有し、 前記セラミック製軌道面板と前記筒状部の壁面との間に
隙間を形成したセラミック軸受。1. A ceramic bearing in which a plurality of rolling elements are interposed between races formed by brazing a ceramic raceway surface plate to the inner surface of a pair of metal outer plates arranged opposite to each other. The ceramic bearing is a thrust bearing, and the pair of metal outer plates have an annular flat plate shape, and have a cylindrical portion on a side that is a fitting surface at the time of mounting, and the ceramic raceway plate and the cylinder. A ceramic bearing that has a gap between it and the wall of the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989052765U JPH0626741Y2 (en) | 1989-05-08 | 1989-05-08 | Ceramic bearings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989052765U JPH0626741Y2 (en) | 1989-05-08 | 1989-05-08 | Ceramic bearings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02143520U JPH02143520U (en) | 1990-12-05 |
| JPH0626741Y2 true JPH0626741Y2 (en) | 1994-07-20 |
Family
ID=31573352
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989052765U Expired - Fee Related JPH0626741Y2 (en) | 1989-05-08 | 1989-05-08 | Ceramic bearings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0626741Y2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012153927A (en) * | 2011-01-25 | 2012-08-16 | Sharp Corp | Film forming apparatus with rotation support structure |
| JP6880542B2 (en) * | 2015-07-30 | 2021-06-02 | 日本電気株式会社 | Bearing equipment |
| KR102488077B1 (en) * | 2021-08-17 | 2023-01-13 | (주)아폴로세이코코리아 | Soldering device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58163821A (en) * | 1982-03-19 | 1983-09-28 | Fuji Seikou Kk | Bearing |
| JPS63115913A (en) * | 1986-11-04 | 1988-05-20 | Hisashi Kobayashi | Double row ball bearing made of ceramic |
-
1989
- 1989-05-08 JP JP1989052765U patent/JPH0626741Y2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02143520U (en) | 1990-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |