JPH06294417A - Rolling bearing for preventing electrocorrosion - Google Patents
Rolling bearing for preventing electrocorrosionInfo
- Publication number
- JPH06294417A JPH06294417A JP7944793A JP7944793A JPH06294417A JP H06294417 A JPH06294417 A JP H06294417A JP 7944793 A JP7944793 A JP 7944793A JP 7944793 A JP7944793 A JP 7944793A JP H06294417 A JPH06294417 A JP H06294417A
- Authority
- JP
- Japan
- Prior art keywords
- aromatic polyamide
- polyamide resin
- rolling bearing
- resin
- insulating coating
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、鉄道車両用のモータの
軸受等に使用される電食防止転がり軸受に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-corrosion rolling bearing used for bearings of motors for railway vehicles.
【０００２】[0002]
【従来の技術】従来、鉄道車両用のモータ等に使用され
る転がり軸受において、転動体と軌道輪との間に電食現
象が生じることを防止するために、外輪や内輪の、少な
くともハウジングまたは軸が嵌合される面に絶縁性の被
膜を設けて、外部からの電流を遮断することが行われて
いる。2. Description of the Related Art Conventionally, in a rolling bearing used for a motor for a railway vehicle or the like, in order to prevent an electrolytic corrosion phenomenon from occurring between a rolling element and a race ring, at least a housing of an outer ring or an inner ring or An insulating film is provided on the surface on which the shaft is fitted to block the current from the outside.
【０００３】一般に、電気絶縁性能に優れたプラスチッ
ク材料であって絶縁被膜に適する材料としては、ポリア
ミド６６，ポリアミド６，ポリアミド４６等の脂肪族ポ
リアミド樹脂や、ポリブチレンテレフタレート，ポリエ
チレンテレフタレート等のポリエステル樹脂や、特開平
３−２７７８１８号公報に開示されているポリフェニレ
ンサルファイド樹脂（以下ＰＰＳ樹脂という）がある。In general, as a plastic material having excellent electric insulation performance and suitable for an insulating coating, an aliphatic polyamide resin such as polyamide 66, polyamide 6, polyamide 46 or the like, or polyester resin such as polybutylene terephthalate or polyethylene terephthalate, etc. Alternatively, there is a polyphenylene sulfide resin (hereinafter referred to as PPS resin) disclosed in JP-A-3-277818.
【０００４】[0004]
【発明が解決しようとする課題】しかし、これらの各プ
ラスチック材料は、いずれも、鉄道車両用モータの軸受
等の絶縁被膜として適用する場合に要求される機能の全
てを満足させるものではない。すなわち、このような用
途に適用した場合の絶縁被膜には、寸法安定性と耐
クリープ性と耐熱性とを同時に満たす機能が要求され
ている。However, none of these plastic materials satisfies all the functions required when applied as an insulating coating for bearings of railway vehicle motors. That is, the insulating coating applied to such an application is required to have a function of simultaneously satisfying dimensional stability, creep resistance and heat resistance.
【０００５】寸法安定性は、軸受をハウジングまたは
軸に、所定の締め代で嵌合するために必要とされる。 耐クリープ性は、上記締め代を保ったままの状態に長
時間おいても絶縁被膜の厚さを減少させないために必要
とされる。 耐熱性は、鉄道車両用モータ等において、軸受が高速
回転で使用される際には絶縁被膜が約１２０℃程度まで
昇温することから、そのような高温でも絶縁被膜が変形
したり、絶縁性能が低下することを防止するために必要
とされる。Dimensional stability is required to fit the bearing to the housing or shaft with a given interference. The creep resistance is required so as not to reduce the thickness of the insulating coating even when the tightening margin is maintained for a long time. With respect to heat resistance, in motors for railway vehicles, etc., when the bearing is used at high speed rotation, the insulating coating temperature rises to about 120 ° C. Therefore, the insulating coating may be deformed or the insulating performance may increase even at such a high temperature. Is required to prevent the drop.
【０００６】ところが、従来使用されていた上述のプラ
スチック材料のうち、ポリアミド６６，ポリアミド６，
ポリアミド４６等の脂肪族ポリアミド樹脂は、吸水によ
る寸法変化が大きいという問題点があった。また、ポリ
ブチレンテレフタレート，ポリエチレンテレフタレート
等のポリエステル樹脂には、耐熱性を満足しないという
問題点があった。However, among the above-mentioned conventional plastic materials, polyamide 66, polyamide 6,
The aliphatic polyamide resin such as polyamide 46 has a problem that the dimensional change due to water absorption is large. Further, polyester resins such as polybutylene terephthalate and polyethylene terephthalate have a problem that they do not satisfy heat resistance.
【０００７】さらに、ＰＰＳ樹脂には、耐クリープ性が
劣るという問題点があった。本発明は、このような従来
技術の問題点に着目してなされたものであり、絶縁被膜
の材料として芳香族ポリアミド樹脂を使用することによ
り、耐クリープ性，耐熱性に優れ、かつ寸法安定性の良
い絶縁被膜を有する電食防止転がり軸受を提供すること
を目的とする。Further, the PPS resin has a problem that the creep resistance is poor. The present invention has been made by paying attention to such problems of the prior art, and by using an aromatic polyamide resin as a material for the insulating coating, it has excellent creep resistance and heat resistance, and has dimensional stability. An object of the present invention is to provide an electrolytic corrosion preventing rolling bearing having a good insulating coating.
【０００８】[0008]
【課題を解決するための手段】上記の目的を達成するた
め、本発明は、電食防止転がり軸受の軌道輪に形成する
絶縁被膜を、ガラス繊維を含有する芳香族ポリアミド樹
脂組成物により形成したことを特徴とする。前記芳香族
ポリアミド樹脂組成物に含有させるガラス繊維は、耐ク
リープ性を向上させる強化材である。In order to achieve the above object, the present invention provides an insulating coating formed on a bearing ring of an anticorrosion rolling bearing with an aromatic polyamide resin composition containing glass fibers. It is characterized by The glass fiber contained in the aromatic polyamide resin composition is a reinforcing material that improves creep resistance.
【０００９】本発明の絶縁被膜形成材料としては、芳香
族ポリアミド樹脂５０〜９０重量％、ガラス繊維１０〜
５０重量％の芳香族ポリアミド樹脂樹脂組成物を使用す
ることが好ましい。更に望ましくは、芳香族ポリアミド
樹脂組成物の比率が５０〜７０重量％、ガラス繊維３０
〜５０重量％である。As the insulating film forming material of the present invention, aromatic polyamide resin 50 to 90% by weight, glass fiber 10 to
It is preferable to use 50% by weight of the aromatic polyamide resin resin composition. More preferably, the ratio of the aromatic polyamide resin composition is 50 to 70% by weight, and the glass fiber 30
~ 50% by weight.
【００１０】本発明に使用する芳香族ポリアミド樹脂と
して、例えば、三井石油化学（株）製の「アーレン」
（商品名）、ＢＡＳＦジャパン（株）製の「ウルトラミ
ッドＴ（商品名）、アモコジャパン（株）製の「アモデ
ル」（商品名）等があるが、好ましくは、特開昭６２−
２５６８３０号公報に開示されているようなガラス転移
温度（Ｔｇ）が１１０℃以上である芳香族ポリアミド樹
脂が良い。The aromatic polyamide resin used in the present invention is, for example, "Aren" manufactured by Mitsui Petrochemical Co., Ltd.
(Trade name), "Ultramid T (trade name)" manufactured by BASF Japan Ltd., "Amodel" (trade name) manufactured by Amoco Japan Co., Ltd., etc., but preferably JP-A-62-1
An aromatic polyamide resin having a glass transition temperature (Tg) of 110 ° C. or higher as disclosed in JP-A-256830 is preferable.
【００１１】また、ガラス繊維の含有量は、５０重量％
を越えると溶融樹脂の流動性が低下して成形性が悪化す
るため好ましくない。反対に、ガラス繊維の含有量が１
０重量％未満では耐クリープ性が低下する。なお、この
ような絶縁被膜をなす材料に、必要に応じて相溶化剤，
離型剤，カップリング剤等を添加しても良い。The glass fiber content is 50% by weight.
If it exceeds, the flowability of the molten resin is lowered and the moldability is deteriorated, which is not preferable. On the contrary, the glass fiber content is 1
If it is less than 0% by weight, the creep resistance is lowered. If necessary, a compatibilizing agent may be added to the material forming the insulating coating,
A release agent, a coupling agent, etc. may be added.
【００１２】[0012]
【作用】 本発明に使用する芳香族ポリアミド樹脂の寸法安定性
について述べる。芳香族ポリアミド樹脂はポリアミド系
樹脂としての吸水特性を有しているが、ポリアミド６
６，ポリアミド４６等の脂肪族ポリアミド樹脂と比較す
ると吸水による寸法変化が小さい。The dimensional stability of the aromatic polyamide resin used in the present invention will be described. Aromatic polyamide resins have water absorption properties as polyamide resins, but polyamide 6
6, Dimensional change due to water absorption is smaller than that of aliphatic polyamide resin such as 6, polyamide 46.
【００１３】例えば、ガラス繊維３０重量％の樹脂組成
物で厚さ０．６ｍｍの試験片を用いて上記各樹脂の吸水
による変化を比べたところ、温度２３℃，相対湿度６５
％の室内に１００日間放置後の芳香族ポリアミド樹脂の
吸水重量変化率は、ポリアミド６６の約１／２、ポリア
ミド４６の約１／３であった。また、吸水による寸法変
化率についても、芳香族ポリアミド樹脂組成物の寸法変
化率は０．０２〜０．０５％であって、これはポリアミ
ド６６の約１／２、ポリアミド４６の約１／３であっ
た。その理由は、特開昭６２−２５６８３０号公報に開
示されるように、芳香族ポリアミド樹脂はポリマーの繰
り返し単位中に占めるアミド結合（−ＣＯＮＨ−）の分
子量比が脂肪族ポリアミド樹脂（この場合ポリアミド
６，ポリアミド６６，ポリアミド４６）の比に較べて小
さいことによる。上記の芳香族ポリアミド樹脂の吸水に
よる寸法変化率の値（０．０２〜０．０５％）は、本発
明の意図する電食防止転がり軸受に実際に使用する上で
支障のない範囲である。For example, when a test piece having a resin composition of 30% by weight of glass fiber and a thickness of 0.6 mm was used and the change in each of the above resins due to water absorption was compared, a temperature of 23 ° C. and a relative humidity of 65
% Of the aromatic polyamide resin after being left in a room of 100% for about 100 days was about 1/2 of that of polyamide 66 and about 1/3 of that of polyamide 46. Regarding the dimensional change rate due to water absorption, the dimensional change rate of the aromatic polyamide resin composition is 0.02 to 0.05%, which is about ½ of polyamide 66 and about ⅓ of polyamide 46. Met. The reason is that, as disclosed in JP-A-62-256830, an aromatic polyamide resin has an aliphatic polyamide resin (in this case, polyamide) in which the molecular weight ratio of amide bonds (-CONH-) in the repeating units of the polymer is high. 6, because it is smaller than the ratio of polyamide 66, polyamide 46). The value of the dimensional change rate (0.02 to 0.05%) of the above aromatic polyamide resin due to water absorption is within a range that does not cause any problem in practical use in the rolling bearing which is intended for the purpose of the present invention.
【００１４】次に、本発明に使用する芳香族ポリアミ
ド樹脂の耐クリープ性について述べる。一般に、合成樹
脂の耐クリープ性能はガラス転移温度を越えると急激に
悪化する。例えば、ＰＰＳ樹脂のガラス転移温度は約８
５℃であり、これより高温では耐クリープ性能がさらに
低くなる。Next, the creep resistance of the aromatic polyamide resin used in the present invention will be described. Generally, the creep resistance of synthetic resins rapidly deteriorates when the glass transition temperature is exceeded. For example, the glass transition temperature of PPS resin is about 8
The temperature is 5 ° C., and the creep resistance is further deteriorated at higher temperatures.
【００１５】これに対して、芳香族ポリアミド樹脂の特
徴として、高いガラス転移温度を有する点を挙げること
ができる。例えば、特開昭６２−２５６８３０号公報や
特開昭６２−２０９１３５号公報に開示されるように、 一般式〔Ｉ〕 −ＮＨ−Ｒ−ＮＨ−ＣＯ−Ｐｈ−ＣＯ− 一般式〔ＩＩ〕 −ＮＨ−Ｒ−ＮＨ−ＣＯ−Ａｒ−ＣＯ− 〔式中、 Ｒ ：炭素原子数が４ないし２５の二価の炭化水素基 Ｐｈ：フェニレン基 Ａｒ：１，３−フェニレン基以外の炭素原子数が６ない
し２０の二価の炭化水素基〕で表される構成成分の組み
合わせにより、種々のガラス転移温度を有する芳香族ポ
リアミド樹脂の製造が可能であり、例えば後述する実施
例の芳香族ポリアミド樹脂はガラス転移温度約１２５℃
のものである。On the other hand, a characteristic of the aromatic polyamide resin is that it has a high glass transition temperature. For example, as disclosed in JP-A-62-256830 and JP-A-62-209135, the general formula [I] -NH-R-NH-CO-Ph-CO-general formula [II]- NH-R-NH-CO-Ar-CO- [In the formula, R: a divalent hydrocarbon group having 4 to 25 carbon atoms; Ph: a phenylene group; Ar: a carbon atom number other than 1,3-phenylene group; 6 to 20 divalent hydrocarbon groups], it is possible to produce an aromatic polyamide resin having various glass transition temperatures. For example, the aromatic polyamide resins of Examples described later are Glass transition temperature about 125 ℃
belongs to.
【００１６】一般に、芳香族ポリアミド樹脂や脂肪族ポ
リアミド樹脂，ＰＰＳ樹脂の射出成形で製造される成形
品の結晶化度（樹脂を結晶部と非晶部とに分けたときの
結晶部の割合）は、およそ１０〜４０重量％で、非晶部
分の割合の方が大きい。しかして、非晶部の分子は、ガ
ラス転移温度より下の温度では凍結されているが、ガラ
ス転移温度を越える温度においてはブラウン運動により
動くことができる。そのため、ガラス転移温度が高温で
の耐クリープ性能に大きな影響を及ぼす。Generally, the crystallinity of a molded article produced by injection molding of an aromatic polyamide resin, an aliphatic polyamide resin, or a PPS resin (the ratio of crystal parts when the resin is divided into crystalline parts and amorphous parts) Is about 10 to 40% by weight, and the proportion of the amorphous portion is larger. Thus, the molecules of the amorphous part are frozen at a temperature below the glass transition temperature, but can move by Brownian motion at a temperature above the glass transition temperature. Therefore, the glass transition temperature has a great influence on the creep resistance performance at high temperatures.
【００１７】本発明にあっては、使用温度より高いガラ
ス転移温度を有する芳香族ポリアミド樹脂を絶縁材料に
用いることで、耐クリープ性を向上させることができ
る。 さらに、本発明に使用する芳香族ポリアミド樹脂の耐
熱性については、４００００時間での引張強度の半減温
度が約１５０℃であり、１００〜１４０℃での使用条件
に対して十分に適用可能である。In the present invention, creep resistance can be improved by using an aromatic polyamide resin having a glass transition temperature higher than the operating temperature as the insulating material. Further, regarding the heat resistance of the aromatic polyamide resin used in the present invention, the half-temperature of the tensile strength at 40,000 hours is about 150 ° C, and it is sufficiently applicable to the use conditions at 100 to 140 ° C. .
【００１８】かくして、本発明では、芳香族ポリアミド
樹脂を電食防止転がり軸受の軌道輪に形成する絶縁被膜
に使用することにより、寸法安定性，耐クリープ性に優
れ、かつ耐熱性の良い優れた特性を備えた電食防止転が
り軸受を提供することができる。Thus, in the present invention, the aromatic polyamide resin is used for the insulating coating formed on the race of the anti-corrosion rolling bearing, so that the dimensional stability and the creep resistance are excellent and the heat resistance is excellent. It is possible to provide an anti-corrosion rolling bearing having characteristics.
【００１９】[0019]
【実施例】以下、本発明を実施例により詳細に説明す
る。図１に示す転がり軸受（円筒ころ軸受）１Ａの外輪
１１の外面を被覆する絶縁被膜２の材料として、表１の
各実施例および比較例に示す樹脂組成物を用いたものを
被試験体とし、それら各被試験体について以下の特性評
価を実施した。EXAMPLES The present invention will be described in detail below with reference to examples. As the material of the insulating coating 2 that covers the outer surface of the outer ring 11 of the rolling bearing (cylindrical roller bearing) 1A shown in FIG. 1, the resin composition shown in each of the examples and comparative examples of Table 1 was used as a test object. The following characteristic evaluations were carried out for each of the test objects.
【００２０】[0020]
【表１】 [Table 1]
【００２１】なお、各被試験体の転がり軸受１Ａは、外
輪１１の外周及び左右両端面にそれぞれ溝１１ａ，１１
ｂを形成し、所定厚さの絶縁被膜２を射出成形により外
輪１１の外周（ハウジングが嵌合される面）から両端面
に連続して付着させることで製作した。すなわち、先
ず、予め各材料組成を、ブレンダやヘンシェルミキサ等
により混合して二軸押出機等の押出機に供給し、押出機
から材料ペレットを得た。次に、外輪１１の外側に、絶
縁被膜２の厚さ（ここでは約１．０ｍｍ）に対応させて
形成した金型を設置し、外輪１１と金型との間の空間に
前記ペレットを溶融した材料を射出し、所定の時間冷却
後、外輪１１と絶縁被膜２を有する成形品を得た。The rolling bearing 1A of each test object has grooves 11a, 11 on the outer circumference and both left and right end surfaces of the outer ring 11, respectively.
b was formed, and the insulating coating film 2 having a predetermined thickness was continuously formed by injection molding from the outer circumference (the surface where the housing is fitted) of the outer ring 11 to both end surfaces. That is, first, each material composition was mixed in advance with a blender, a Henschel mixer, or the like, and the mixture was supplied to an extruder such as a twin-screw extruder to obtain material pellets from the extruder. Next, a mold formed corresponding to the thickness of the insulating coating 2 (here, about 1.0 mm) is installed outside the outer ring 11, and the pellets are melted in the space between the outer ring 11 and the mold. The above material was injected, and after cooling for a predetermined time, a molded product having the outer ring 11 and the insulating coating 2 was obtained.
【００２２】表１に示す樹脂において、芳香族ポリアミ
ド樹脂としては三井石油化学（株）製の「アーレン」
（商品名）を、ＰＰＳ樹脂としては呉羽化学工業（株）
製の「フォートロンＫＰＳ」（商品名）を、ポリアミド
４６としては帝人（株）製の「テイジンナイロン４６」
（商品名）を使用し、また、ガラス繊維として繊維径が
１０〜１５μｍ，長さが約０．２〜１．０ｍｍのものを
用いた。なお、芳香族ポリアミド樹脂はガラス転移温度
が約１２５℃のものを使用した。Among the resins shown in Table 1, as the aromatic polyamide resin, "arene" manufactured by Mitsui Petrochemical Co., Ltd.
(Trade name) is used as PPS resin by Kureha Chemical Industry Co., Ltd.
"Fortron KPS" (trade name) manufactured by Teijin Ltd. as Teijin Nylon 46
(Trade name) was used, and glass fibers having a fiber diameter of 10 to 15 μm and a length of about 0.2 to 1.0 mm were used. The aromatic polyamide resin used had a glass transition temperature of about 125 ° C.
【００２３】表１に、各評価項目をしめしている。 寸法安定性の評価は、上記被試験体を２０時間水中に
浸漬し、浸漬前後の寸法変化量を測定して行った。その
変化量が８μｍ以下であれば合格とした。 耐クリープ性の評価は、上記被試験体を締め代３０μ
ｍでハウジングに圧入したものを、１００℃の雰囲気下
で１００時間放置し、放置前後の寸法変化量を測定して
行った。その変化量が８μｍ以下であれば合格とした。Table 1 shows each evaluation item. The dimensional stability was evaluated by immersing the test object in water for 20 hours and measuring the amount of dimensional change before and after the immersion. If the amount of change was 8 μm or less, it was determined to be acceptable. Creep resistance is evaluated by tightening the above-mentioned DUT with a tightening margin of 30μ.
What was press-fitted into the housing at m was left in an atmosphere of 100 ° C. for 100 hours, and the amount of dimensional change before and after standing was measured. If the amount of change was 8 μm or less, it was determined to be acceptable.
【００２４】成形性の評価は、上記被試験体のウエルド
やゲート部等にボイド，割れ等の無いものを合格とし
た。絶縁性能の評価は、上記被試験体を２０時間水中に
浸漬し、表面の水を拭き取った後、絶縁被膜２の外周に
金属製の環を装着し、外輪１１とその金属環との間の絶
縁抵抗値を測定して行った。その絶縁抵抗値が２０００
ＭΩ以上であれば合格とした。For the evaluation of the formability, the test piece having no weld, gate portion, or the like having voids or cracks was regarded as acceptable. The insulation performance was evaluated by immersing the test object in water for 20 hours, wiping off the water on the surface, and then mounting a metal ring on the outer periphery of the insulating coating 2 so that a gap between the outer ring 11 and the metal ring was attached. The insulation resistance value was measured. Its insulation resistance is 2000
If it was MΩ or more, it was determined to be acceptable.
【００２５】表１の結果より、実施例１〜３は、寸法安
定性，耐クリープ性，成形性，絶縁性能のいずれについ
ても合格した。これに対して、比較例１のＰＰＳ樹脂で
は耐クリープ性が悪く、比較例２のポリアミド４６樹脂
は寸法安定性と耐クリープ性に劣る。また、比較例３の
芳香族ポリアミド樹脂単体では寸法安定性と耐クリープ
性に劣り、比較例４のガラス繊維が６０重量％入りの芳
香族ポリアミド樹脂は成形性が悪かった。したがって、
芳香族ポリアミド樹脂のガラス繊維添加量は１０〜５０
重量％が好ましい。From the results shown in Table 1, Examples 1 to 3 passed all of the dimensional stability, creep resistance, moldability and insulation performance. On the other hand, the PPS resin of Comparative Example 1 is poor in creep resistance, and the polyamide 46 resin of Comparative Example 2 is inferior in dimensional stability and creep resistance. Further, the aromatic polyamide resin alone of Comparative Example 3 was inferior in dimensional stability and creep resistance, and the aromatic polyamide resin of Comparative Example 4 containing 60% by weight of glass fiber had poor moldability. Therefore,
The amount of glass fiber added to the aromatic polyamide resin is 10 to 50.
Weight percent is preferred.
【００２６】図２には、上記実施例１および比較例１，
比較例２の被試験体について行った耐熱性評価試験の結
果を示す。この試験結果は、クリープ特性と相関のある
曲げ弾性率の温度依存性を示しており、実施例１と比較
例２の芳香族ポリアミド樹脂はガラス転移温度約１２５
℃，比較例１のＰＰＳ樹脂はガラス転移温度約８５℃で
ある。FIG. 2 shows Example 1 and Comparative Example 1 described above.
The result of the heat resistance evaluation test conducted on the test object of Comparative Example 2 is shown. This test result shows the temperature dependence of the flexural modulus that correlates with the creep property, and the aromatic polyamide resins of Example 1 and Comparative Example 2 have a glass transition temperature of about 125.
C., the PPS resin of Comparative Example 1 has a glass transition temperature of about 85.degree.
【００２７】ガラス転移温度を越えると曲げ弾性率の低
下が顕著になりクリープが起こり易くなるが、表１から
も明らかな耐クリープ性に優れた実施例１については、
１２０〜１４０℃で十分に耐える高温強度，耐クリープ
性が確認できた。図３に、本発明の電食防止転がり軸受
の他の実施例を示す。この実施例は、転がり軸受として
玉軸受１Ｂを対象とし、その外輪１１と内輪１２との外
面を、それぞれ上記実施例１〜３で示したガラス繊維を
含有する芳香族ポリアミド樹脂樹脂組成物からなる絶縁
被膜２で被覆したものである。なお、外輪１１の外周及
び左右両端面にそれぞれ溝１１ａ，１１ｂを形成すると
共に、内輪１２の内周及び左右両端面にもそれぞれ溝１
２ａ，１２ｂを形成することにより、射出成形された絶
縁被膜２の付着性を高めている。When the glass transition temperature is exceeded, the flexural modulus is remarkably reduced and creep easily occurs. However, Table 1 clearly shows excellent creep resistance in Example 1.
It was possible to confirm high-temperature strength and creep resistance that can withstand at 120 to 140 ° C. FIG. 3 shows another embodiment of the electrolytic corrosion preventing rolling bearing of the present invention. This example is directed to a ball bearing 1B as a rolling bearing, and the outer surfaces of the outer ring 11 and the inner ring 12 are made of the aromatic polyamide resin resin composition containing the glass fibers shown in Examples 1 to 3, respectively. It is covered with an insulating coating 2. The grooves 11a and 11b are formed on the outer circumference and the left and right end surfaces of the outer ring 11, respectively, and the groove 1 is formed on the inner circumference and the left and right end surfaces of the inner ring 12, respectively.
By forming 2a and 12b, the adhesiveness of the injection-molded insulating coating 2 is enhanced.
【００２８】[0028]
【発明の効果】以上説明してきたように、本発明にあっ
ては、絶縁被膜を、ガラス繊維を含有する芳香族ポリア
ミド樹脂組成物により形成したため、寸法安定性，耐ク
リープ性，耐熱性，絶縁性に優れた絶縁被膜が得られ
て、例えば鉄道車両用モータの軸受などのような高速回
転で高温にさらされる使用条件下でも安定した性能が保
証できる電食防止転がり軸受を提供できるという効果を
奏する。As described above, in the present invention, since the insulating coating is formed of the aromatic polyamide resin composition containing glass fiber, dimensional stability, creep resistance, heat resistance, insulation It is possible to provide an anti-corrosion rolling bearing that can ensure stable performance even under operating conditions exposed to high temperatures at high speeds, such as bearings for motors for railway vehicles, by providing an insulating coating with excellent properties. Play.
【図１】本発明の電食防止転がり軸受の一実施例の断面
図である。FIG. 1 is a cross-sectional view of an embodiment of an anti-corrosion rolling bearing according to the present invention.
【図２】図１の電食防止転がり軸受の耐熱性評価試験の
結果を表したグラフである。FIG. 2 is a graph showing the results of a heat resistance evaluation test of the electrolytic corrosion preventing rolling bearing of FIG.
【図３】本発明の電食防止転がり軸受の他の実施例の断
面図である。FIG. 3 is a sectional view of another embodiment of the electrolytic corrosion preventing rolling bearing of the present invention.
２ 絶縁被膜 １１ 軌道輪（外輪） １２ 軌道輪（内輪） 2 Insulating coating 11 Race ring (outer ring) 12 Race ring (inner ring)
Claims (1)
り軸受において、前記絶縁被膜を、ガラス繊維を含有す
る芳香族ポリアミド樹脂組成物により形成したことを特
徴とする電食防止転がり軸受。1. A galvanic corrosion preventing rolling bearing having an insulating coating on a bearing ring, wherein the insulating coating is formed of an aromatic polyamide resin composition containing glass fibers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7944793A JPH06294417A (en) | 1993-04-06 | 1993-04-06 | Rolling bearing for preventing electrocorrosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7944793A JPH06294417A (en) | 1993-04-06 | 1993-04-06 | Rolling bearing for preventing electrocorrosion |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002083773A Division JP3736486B2 (en) | 2002-03-25 | 2002-03-25 | Anti-corrosion rolling bearing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06294417A true JPH06294417A (en) | 1994-10-21 |
Family
ID=13690141
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7944793A Pending JPH06294417A (en) | 1993-04-06 | 1993-04-06 | Rolling bearing for preventing electrocorrosion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06294417A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120093453A1 (en) * | 2006-01-31 | 2012-04-19 | John Horvat | Bearing anti creep device & method |
| US10823229B2 (en) | 2017-03-24 | 2020-11-03 | Aktiebolaget Skf | Rolling-element bearing including an electrically insulating layer |
| KR20210002730A (en) | 2018-10-15 | 2021-01-08 | 미쓰비시 마테리알 가부시키가이샤 | Lid material and package for package |
-
1993
- 1993-04-06 JP JP7944793A patent/JPH06294417A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120093453A1 (en) * | 2006-01-31 | 2012-04-19 | John Horvat | Bearing anti creep device & method |
| US8444321B2 (en) * | 2006-01-31 | 2013-05-21 | John Horvat | Bearing anti creep device and method |
| US10823229B2 (en) | 2017-03-24 | 2020-11-03 | Aktiebolaget Skf | Rolling-element bearing including an electrically insulating layer |
| KR20210002730A (en) | 2018-10-15 | 2021-01-08 | 미쓰비시 마테리알 가부시키가이샤 | Lid material and package for package |
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