JPH0526244A - Grease sealed bearing - Google Patents
Grease sealed bearingInfo
- Publication number
- JPH0526244A JPH0526244A JP18627791A JP18627791A JPH0526244A JP H0526244 A JPH0526244 A JP H0526244A JP 18627791 A JP18627791 A JP 18627791A JP 18627791 A JP18627791 A JP 18627791A JP H0526244 A JPH0526244 A JP H0526244A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- grease
- steel
- ring
- inner ring
- 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.)
- Granted
Links
Landscapes
- Rolling Contact Bearings (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は、自動車電装部品（オ
ルタネータ、電磁クラッチ、アイドラプーリー等）及び
その他の補機部品用のグリース封入軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grease-filled bearing for automobile electrical components (alternator, electromagnetic clutch, idler pulley, etc.) and other auxiliary components.
【０００２】[0002]
【従来の技術】自動車の電装部品や補機部品に用いられ
るグリース封入軸受を高荷重下で高速回転させた場合、
軸受の転走面に金属疲労による表面剥離・表層剥離とは
異なり、相当内部の深い部分から生じる特異な剥離現象
が現われ、グリース封入軸受の寿命を短くする原因とな
っている。2. Description of the Related Art When a grease-filled bearing used for an electric component of an automobile or an auxiliary component is rotated at a high speed under a high load,
Unlike surface peeling / surface layer peeling due to metal fatigue on the rolling surface of the bearing, a unique peeling phenomenon that occurs from a deep portion inside considerably appears, which is the cause of shortening the life of the grease-filled bearing.
【０００３】上記の特異性剥離は、先に本出願人の出願
（特開平２−１９０６１号）において明らかにしている
ように、軸受の高速化による振動が転走面の鏡面摩耗を
引き起こし、それによる新生面の形成が触媒作用をなし
てグリースを分解せしめ、その際に発生した水素が鋼中
に侵入し、水素脆性を引起こすことが原因である。As described above in the applicant's application (Japanese Patent Application Laid-Open No. 2-19061), the above-mentioned peculiar peeling causes the mirror surface wear of the rolling surface due to the vibration due to the high speed of the bearing, The reason is that the formation of a new surface by means of catalysis decomposes the grease, and the hydrogen generated at that time penetrates into the steel, causing hydrogen embrittlement.
【０００４】上記の出願においては、上記の特異性剥離
を防止する手段として軸受転走面に酸化皮膜を形成する
ことを開示した。In the above application, it is disclosed that an oxide film is formed on the bearing rolling surface as a means for preventing the above-mentioned specific peeling.
【０００５】[0005]
【発明が解決しようとする課題】軸受転走面に酸化皮膜
を形成するという上記の手段は、特異性剥離を防止する
一つの有効な手段であるが、酸化皮膜を形成するため
に、例えば、低温加熱下のカセイソーダ水溶液中に軌道
輪を浸漬して四三酸化鉄皮膜を形成させるという手間の
かかる処理が必要となる。The above-mentioned means of forming an oxide film on the rolling contact surface of the bearing is one effective means for preventing specific exfoliation, but in order to form an oxide film, for example, It requires a laborious process of immersing the bearing ring in an aqueous solution of caustic soda under low temperature heating to form a ferrosoferric oxide film.
【０００６】そこで、この発明は上記のごとき処理を施
すことなく、軌道輪の材料自体により特異性剥離を防止
できるようにすることを課題とする。Therefore, an object of the present invention is to prevent peculiar peeling by the material of the bearing ring itself without performing the above-mentioned treatment.
【０００７】[0007]
【課題を解決するための手段】上記の課題を解決するた
めに、この発明はグリース封入軸受の内側軌道輪（以下
内輪）又は外側軌道輪（以下外輪）のうち、少なくとも
固定側に使用される軌道輪を１.5〜６％Ｃｒ含有鋼によ
り構成するという手段を採用した。In order to solve the above-mentioned problems, the present invention is used at least on the fixed side of an inner race ring (hereinafter inner ring) or an outer race ring (hereinafter outer ring) of a grease-filled bearing. The means of forming the bearing ring from steel containing 1.5 to 6% Cr was adopted.
【０００８】[0008]
【作用】１.5〜６％Ｃｒ含有鋼は、金属表面に効果的な
厚みの強いち密なＣｒの酸化皮膜〔ＦｅＣｒＯ4 〕がで
きるため、転走面を不活性にする。このため、グリース
の分解を抑制する。また、たとえグリースが分解して
も、その際に発生した水素が鋼中に侵入することを防
ぐ。即ち、軌道輪の材料自体が酸化皮膜を形成し、特異
性剥離を防止する。In the steel containing 1.5 to 6% Cr, a dense and dense oxide film of Cr [FeCrO 4 ] is formed on the metal surface, so that the rolling surface becomes inactive. Therefore, the decomposition of grease is suppressed. Even if the grease is decomposed, hydrogen generated at that time is prevented from entering the steel. That is, the material of the bearing ring itself forms an oxide film to prevent specific peeling.
【０００９】[0009]
【実施例】図１は、オルタネータのプーリ側に使用され
るグリース封入軸受であり、内輪１と外輪２との間に介
在される転動体３を保持器４により案内保持し、上記保
持器４の両側において内輪１と外輪２との間にシール部
材５、５を装着し、これらのシール部材５、５によって
囲まれた空所にグリース６を封入したものである。1 is a grease-filled bearing used on the pulley side of an alternator, in which a rolling element 3 interposed between an inner ring 1 and an outer ring 2 is guided and held by a cage 4, and the cage 4 Sealing members 5 and 5 are mounted between the inner ring 1 and the outer ring 2 on both sides of, and grease 6 is filled in a space surrounded by these sealing members 5 and 5.
【００１０】上記の場合、外輪２がハウジングに固定さ
れ、内輪１が回転軸に装着される。外輪２は１.5〜６％
望ましくは２〜６％のＣｒ含有鋼により構成される。内
輪２も同様の材料で構成してもよいが、コストの面から
通常は一般の軸受鋼が使用される。In the above case, the outer ring 2 is fixed to the housing and the inner ring 1 is mounted on the rotating shaft. Outer ring 2 is 1.5-6%
Desirably, it is composed of steel containing 2 to 6% Cr. The inner ring 2 may be made of the same material, but generally, ordinary bearing steel is used in terms of cost.
【００１１】[0011]
【実験例】上記実施例の軸受に関し、外輪のＣｒ含有量
を順次変えた場合につき、試験温度６０〜８０℃、回転
数１８０００rpm の実験条件で寿命試験を行なった。そ
の試験結果を比較例（軸受鋼を使用したもの）と共に表
１に示す。表１の試験結果は、試験軸受５個の平均値で
ある。[Experimental Example] With respect to the bearings of the above-mentioned examples, a life test was conducted under the experimental conditions of a test temperature of 60 to 80 ° C and a rotation speed of 18,000 rpm when the Cr content of the outer ring was changed sequentially. The test results are shown in Table 1 together with a comparative example (using bearing steel). The test results in Table 1 are average values of five test bearings.
【００１２】上記の試験結果によれば、外輪に１.5％以
上のＣｒ含有鋼を使用したものは転走面に特異性剥離が
見られず、軸受鋼を使用したものに比べて著しく長寿命
を示すことがわかる。According to the above-mentioned test results, when the outer ring uses steel containing 1.5% or more of Cr, no peculiar delamination is observed on the rolling surface, which is significantly longer than that using the bearing steel. It can be seen that the life is shown.
【００１３】[0013]
【表１】 [Table 1]
【００１４】Ｃｒ含有量が６％を越えると、焼入温度が
高くなり、熱処理コストが上がるため、６％以下である
ことが望ましい。If the Cr content exceeds 6%, the quenching temperature rises and the heat treatment cost increases, so it is desirable that the Cr content be 6% or less.
【００１５】以上の結果により、内・外輪のうち、いず
れか一方の固定側軌道輪に１.5〜６％Ｃｒ含有鋼を使用
したものは特異性剥離を防止する効果があることが明ら
かである。From the above results, it is clear that one of the inner ring and the outer ring that uses 1.5 to 6% Cr-containing steel for the fixed side raceway has the effect of preventing specific peeling. is there.
【００１６】[0016]
【発明の効果】以上のように、この発明のグリース封入
軸受は、固定側軌道輪の材料自体により特異性剥離を防
止することができ、また酸化皮膜処理を必要としないの
で製造コストを低減することができる。As described above, the grease-sealed bearing according to the present invention can prevent peculiar peeling due to the material of the fixed side bearing ring itself, and can reduce the manufacturing cost because no oxide film treatment is required. be able to.
【図１】実施例のグリース封入軸受の一部省略断面図FIG. 1 is a partially omitted sectional view of a grease-filled bearing according to an embodiment.
１ 内輪 ２ 外輪 ３ 転動体 ４ 保持器 ５ シール部材 ６ グリース 1 Inner ring 2 Outer ring 3 Rolling element 4 Cage 5 Sealing member 6 Grease
Claims (1)
入軸受において、上記軸受の少なくとも固定側軌道輪が
１.5〜６％Ｃr 含有鋼から成ることを特徴とするグリー
ス封入軸受。Claims: 1. A grease-filled bearing in which grease is filled in the bearing, wherein at least the fixed-side bearing ring of the bearing is made of steel containing 1.5 to 6% Cr. bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3186277A JP3009254B2 (en) | 1991-07-25 | 1991-07-25 | Grease sealed bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3186277A JP3009254B2 (en) | 1991-07-25 | 1991-07-25 | Grease sealed bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0526244A true JPH0526244A (en) | 1993-02-02 |
| JP3009254B2 JP3009254B2 (en) | 2000-02-14 |
Family
ID=16185484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3186277A Expired - Lifetime JP3009254B2 (en) | 1991-07-25 | 1991-07-25 | Grease sealed bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3009254B2 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000011235A1 (en) * | 1998-08-25 | 2000-03-02 | Nsk Ltd. | Surface treated rolling bearing and manufacturing method thereof |
| EP1123986A1 (en) | 2000-02-10 | 2001-08-16 | Nsk Ltd | Rolling bearing |
| JP2003202026A (en) * | 2001-10-22 | 2003-07-18 | Nsk Ltd | Rolling bearing device |
| DE10012350C2 (en) * | 1999-03-19 | 2003-12-11 | Nsk Ltd | roller bearing |
| WO2009145135A1 (en) | 2008-05-28 | 2009-12-03 | Ntn株式会社 | Grease-sealed bearing |
| US8188016B2 (en) | 2003-07-08 | 2012-05-29 | Ntn Corporation | Lubricant composition and bearing using same |
-
1991
- 1991-07-25 JP JP3186277A patent/JP3009254B2/en not_active Expired - Lifetime
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000011235A1 (en) * | 1998-08-25 | 2000-03-02 | Nsk Ltd. | Surface treated rolling bearing and manufacturing method thereof |
| GB2346385A (en) * | 1998-08-25 | 2000-08-09 | Nsk Ltd | Surface treated rolling bearing and manufacturing method thereof |
| US6531000B1 (en) | 1998-08-25 | 2003-03-11 | Nsk Ltd. | Surface treated rolling bearing and manufacturing method thereof |
| GB2346385B (en) * | 1998-08-25 | 2003-06-11 | Nsk Ltd | Surface treated rolling bearing and manufacturing method thereof |
| US6848832B2 (en) | 1998-08-25 | 2005-02-01 | Nsk Ltd. | Surface-treated rolling bearing and manufacturing method thereof |
| DE19981506B4 (en) * | 1998-08-25 | 2006-05-24 | Nsk Ltd. | Surface-treated roller bearing and method for its production |
| DE10012350C2 (en) * | 1999-03-19 | 2003-12-11 | Nsk Ltd | roller bearing |
| EP1123986A1 (en) | 2000-02-10 | 2001-08-16 | Nsk Ltd | Rolling bearing |
| US6602360B2 (en) | 2000-02-10 | 2003-08-05 | Nsk Ltd. | Rolling bearing |
| JP2003202026A (en) * | 2001-10-22 | 2003-07-18 | Nsk Ltd | Rolling bearing device |
| US8188016B2 (en) | 2003-07-08 | 2012-05-29 | Ntn Corporation | Lubricant composition and bearing using same |
| WO2009145135A1 (en) | 2008-05-28 | 2009-12-03 | Ntn株式会社 | Grease-sealed bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3009254B2 (en) | 2000-02-14 |
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