JPH044311A - Galvanic corrosion resistant rolling bearing and manufacture thereof - Google Patents

Galvanic corrosion resistant rolling bearing and manufacture thereof

Info

Publication number
JPH044311A
JPH044311A JP2105944A JP10594490A JPH044311A JP H044311 A JPH044311 A JP H044311A JP 2105944 A JP2105944 A JP 2105944A JP 10594490 A JP10594490 A JP 10594490A JP H044311 A JPH044311 A JP H044311A
Authority
JP
Japan
Prior art keywords
outer ring
fiber
rolling bearing
electrolytic corrosion
composite material
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
Application number
JP2105944A
Other languages
Japanese (ja)
Other versions
JP2950576B2 (en
Inventor
Masakazu Hirata
正和 平田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTN Corp
Original Assignee
NTN Corp
NTN Toyo Bearing Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NTN Corp, NTN Toyo Bearing Co Ltd filed Critical NTN Corp
Priority to JP2105944A priority Critical patent/JP2950576B2/en
Publication of JPH044311A publication Critical patent/JPH044311A/en
Application granted granted Critical
Publication of JP2950576B2 publication Critical patent/JP2950576B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • F16C33/58—Raceways; Race rings
    • F16C33/62—Selection of substances
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/583—Details of specific parts of races
    • F16C33/586—Details of specific parts of races outside the space between the races, e.g. end faces or bore of inner ring
    • 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
    • F16C33/58—Raceways; Race rings
    • F16C33/64—Special methods of manufacture
    • 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
    • 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
    • F16C2208/00—Plastics; Synthetic resins, e.g. rubbers
    • F16C2208/80—Thermosetting resins
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/07—Fixing them on the shaft or housing with interposition of an element
    • F16C35/077—Fixing them on the shaft or housing with interposition of an element between housing and outer race ring

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

PURPOSE:To obtain an galvanic corrosion proofing rolling bearing, which features its easiness in covering treatment and in machining and which has a large withstand-load, by covering both and outer diametral surface and an end surface of an outer ring with a fiber reinforced compound material. CONSTITUTION:An insulating covering film 8 consisting of a fiber reinforced compound material is formed on an outer diametral surface 4 and on both end surfaces 6 of an outer ring 2 of a rolling bearing, which is used for a motor of, for example, a rolling stock. The film 8 is formed by the filament winding method. In other words, a glass fiber or an Alamid fiber, which is pregnated with a thermosetting resin, is wound to prescribed thickness around an outer diametral surface 4 of the outer ring 2 and undergoes an hardening treatment. Then, the outer diameter is finished to the prescribed dimension and precision by means of machining by a lathe or the like.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、鉄道車両のモータ用軸受のように、電食が
起こりうる環境下で使用される転がり軸受の電食防止に
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to prevention of electrolytic corrosion of rolling bearings used in environments where electrolytic corrosion can occur, such as bearings for motors of railway vehicles.

〔従来の技術〕[Conventional technology]

例えば鉄道車両のモータに用いられる転がり軸受の場合
、モータに流れる電流を車輪からレールへ接地して他に
漏れないようにするため接地用簗電装置が設けられてい
るが、この装置が何らかの原因で完全に機能しなかった
場合に、モータの電流が転がり軸受を通って車輪、そし
てレールへと接地することになる。その結果、転がり軸
受の転動体と、外輪または内輪の転走面との間でスパー
クが発生し、これがいわゆる電食を起こして軸受の損耗
を早める原因のひとつとなる。For example, in the case of rolling bearings used in railway vehicle motors, a grounding device is installed to ground the current flowing through the motor from the wheels to the rails to prevent it from leaking elsewhere. If the motor fails to function completely, the motor's current will flow through the rolling bearings to the wheels and then to the rail. As a result, sparks are generated between the rolling elements of the rolling bearing and the raceway surfaces of the outer ring or inner ring, which causes so-called electrolytic corrosion and is one of the causes of accelerated wear of the bearing.

従来、電食防止対策としては、軸受の内・外輪間で転動
体を通じて電流が流れないようにするため、外輪の外径
面および両端面を含む外表面を電気絶縁材料で被覆する
ことにより外部から電気的に絶縁するのが一般的である
。実開昭６０−８５６２６号公報にその一例が記載され
ている。Conventionally, as a countermeasure to prevent electrical corrosion, in order to prevent current from flowing through the rolling elements between the inner and outer rings of a bearing, the outer surface of the outer ring, including the outer diameter surface and both end surfaces, is coated with an electrically insulating material. Generally, it is electrically isolated from the An example of this is described in Japanese Utility Model Application Publication No. 60-85626.

被覆材料としては、硬質ゴム、合成樹脂、セラミックス
などが使用されている。Hard rubber, synthetic resin, ceramics, etc. are used as the covering material.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

電食防止転受用の電気絶縁材料は、電気絶縁性は当然と
して、そのほかに次のような特性が要求される。すなわ
ち、使用時には、■外力による変形がないこと、■軸受
の取り付け、取り外しの際に傷がつかないこと、■不慮
の取扱いでも欠けないように脆くないこと、■１００°
Ｃ以上の耐熱性があること、■潤滑剤による劣化がない
こと、などが挙げられる。また、製造工程では、■機械
加工が容易で、しかも不慮の取り扱いでも欠けないよう
脆くないこと、■被覆処理温度が軸受鋼の硬度を低下さ
せるほど高くないこと、などが挙げられる。Electrical insulating materials for electrolytic corrosion prevention transfers are required to have the following properties in addition to electrical insulation. In other words, during use, ■ it must not be deformed by external force, ■ it must not be damaged when installing or removing the bearing, ■ it must not be brittle so that it will not chip even if handled accidentally, and ■ it must be 100°.
Examples include heat resistance of C or higher, and (1) no deterioration due to lubricants. In addition, in the manufacturing process, (1) it is easy to machine and is not brittle so that it will not chip when handled accidentally, and (2) the coating treatment temperature is not so high as to reduce the hardness of the bearing steel.

ところが、硬質ゴムや合成樹脂は、加工性が高いという
利点がある反面、外力により変形しやすいので軽荷重で
の用途にしか適さないという難点がある。一方、セラミ
ックスは高荷重で使えるという点があるが、脆くて欠け
やすい、処理温度が高い、鋼との密着性が悪いため特別
の工夫を要する、硬質材料であるので加工性が悪い、そ
して高価である、などの欠点がある。However, although hard rubber and synthetic resin have the advantage of being highly processable, they have the disadvantage that they are easily deformed by external forces, making them suitable only for applications with light loads. On the other hand, ceramics can be used under high loads, but they are brittle and easily chipped, require high processing temperatures, have poor adhesion to steel and require special efforts, are hard materials, have poor workability, and are expensive. There are drawbacks such as.

そこで、この発明は、上に述べたような欠点がなく、し
かも、従来使用されていた被覆材料の利点を併せ持つ電
食防止転がり軸受を提供せんとするものである。換言す
れば、この発明の目的は、被覆処理の簡便性、加工性お
よび耐荷重性を具備した電食防止転がり軸受を提供する
ことである。SUMMARY OF THE INVENTION It is an object of the present invention to provide an anti-electrolytic corrosion rolling bearing that does not have the above-mentioned drawbacks and also has the advantages of conventionally used coating materials. In other words, an object of the present invention is to provide an electrolytic corrosion-resistant rolling bearing that is easy to coat, workable, and has good load resistance.

〔課題を解決するための手段〕[Means to solve the problem]

この発明は、外輪の外径面および端面を繊維強化複合材
料で被覆することにより課題を解決した。This invention solved the problem by covering the outer diameter surface and end surface of the outer ring with a fiber-reinforced composite material.

繊維強化複合材料としては、ガラス繊維系複合材料また
はケブラー（登録商標）のようなアラミド繊維系の複合
材料を使用することができる。As the fiber reinforced composite material, a glass fiber composite material or an aramid fiber composite material such as Kevlar (registered trademark) can be used.

〔作用〕[Effect]

熱硬化性樹脂を含浸させたガラス繊維またはアラミド繊
維をフィラメントワインディング法により外輪外径面に
巻き付けて所定の厚さの層を得、硬化処理をして絶縁被
膜を形成させた後、機械加工で所定の寸法、精度に外径
を仕上げる。Glass fiber or aramid fiber impregnated with a thermosetting resin is wound around the outer diameter surface of the outer ring using the filament winding method to obtain a layer of a predetermined thickness, and after being hardened to form an insulating coating, it is machined. Finish the outer diameter to the specified dimensions and accuracy.

フィラメントワインディング法は、繊維強化プラスチッ
ク（ＦＲＰ）の機械成形法のひとつとして知られており
、第２図に示されるように、適当な内型（マンドレル）
に不飽和ポリエステル樹脂またはエポキシ樹脂を含浸さ
せたロービング状の強化繊維（ガラス、カーボン、アラ
ミドなど）を巻き付けて所定の厚さとし、硬化抜脱型す
る方法である。The filament winding method is known as one of the mechanical molding methods for fiber reinforced plastic (FRP), and as shown in Figure 2, a suitable inner mold (mandrel) is
In this method, a roving-like reinforcing fiber (glass, carbon, aramid, etc.) impregnated with unsaturated polyester resin or epoxy resin is wound around the material to a predetermined thickness, and the material is cured and removed.

フィラメントワインディング法を採ることにより、使用
条件に応じて巻数を調整して任意の被膜厚さを容易に得
ることができる。By employing the filament winding method, it is possible to easily obtain a desired coating thickness by adjusting the number of windings according to the conditions of use.

〔実施例〕〔Example〕

第１図に従ってこの発明の詳細な説明すると、外輪（２
）の外径面（４）および両端面（６）に繊維強化複合材
料の絶縁被膜（８）が形成されている。A detailed explanation of this invention according to FIG.
) is formed with an insulating coating (8) of fiber reinforced composite material on the outer diameter surface (4) and both end surfaces (6).

被膜（８）は第２図に示されるようなフィラメントワイ
ンディング法によって形成される。すなわち、熱硬化性
樹脂を含浸させたガラス繊維またはアラミド繊維を外輪
（２）の外径面（４）に巻き付けて所定の厚さにし、硬
化処理を施した後、旋削等の機械加工で外径を所定の寸
法、精度に仕上げる。The coating (8) is formed by a filament winding method as shown in FIG. That is, glass fiber or aramid fiber impregnated with a thermosetting resin is wrapped around the outer diameter surface (4) of the outer ring (2) to a predetermined thickness, hardened, and then externally processed by machining such as turning. Finish the diameter to the specified dimensions and accuracy.

外輪（２）の端面（６）に被膜を形成させるにあたって
は、第１図に想像線で示されるように、外輪（２）の外
径より小径の突部（１２）を有する治具（１０）を外輪
（２）の端面（６）にあてがい、この治具（１０）の突
部（１２）と外輪（２）の端面（６）との間の環状の凹
所に繊維を巻きつけていくことにより、外輪（２）の外
径面（４）に形成される被膜における繊維と同じ巻きつ
け方向で連続して外輪（２）の端面にも被膜を形成させ
ることができる。In order to form a coating on the end surface (6) of the outer ring (2), a jig (10) having a protrusion (12) with a smaller diameter than the outer diameter of the outer ring (2) is used, as shown by the imaginary line in FIG. ) to the end face (6) of the outer ring (2), and wrap the fibers in the annular recess between the protrusion (12) of this jig (10) and the end face (6) of the outer ring (2). By doing so, a coating can be continuously formed on the end surface of the outer ring (2) in the same winding direction as the fibers in the coating formed on the outer diameter surface (4) of the outer ring (2).

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明は、転がり軸受の外輪外
径面および端面を繊維強化複合材料で被覆したから、従
来の硬質ゴムや合成樹脂に比べて高荷重に耐える絶縁被
覆が得られる。また、処理温度が低く、セラミックスは
ど硬くないので機械加工が容易である。さらに、フィラ
メントワインディング法を採用したので、絶縁の要求レ
ベルに応じて所望の被覆厚さを容易に設定することがで
き、製造にあたっては基本的には繊維を巻き付けていく
だけなので成形金型が不要であるなど設備が簡単で特に
少量多種の生産に向く、等々の利点がある。As explained above, in the present invention, since the outer diameter surface and end surface of the outer ring of a rolling bearing are coated with a fiber-reinforced composite material, an insulating coating that can withstand higher loads than conventional hard rubber or synthetic resin can be obtained. In addition, machining is easy because the processing temperature is low and the ceramic is not hard. Furthermore, since we have adopted the filament winding method, it is possible to easily set the desired coating thickness according to the required level of insulation, and because the manufacturing process basically involves winding the fibers, there is no need for a mold. It has the advantages of simple equipment and is especially suitable for small-lot, wide-variety production.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は断面図、 第２図はフィラメントワインディング法を示す概略図で
ある。 ２：外輪 ４：外径面 ６：端面 ８：被膜（１！ｌｉ維強化複合材料） １０：治具 １２：突部FIG. 1 is a sectional view, and FIG. 2 is a schematic diagram showing the filament winding method. 2: Outer ring 4: Outer diameter surface 6: End surface 8: Coating (1! Li fiber reinforced composite material) 10: Jig 12: Projection

Claims (6)

【特許請求の範囲】[Claims] （１）外輪の外径面および端面を繊維強化複合材料で被
覆した電食防止転がり軸受。(1) Electrolytic corrosion-preventing rolling bearing in which the outer diameter surface and end surface of the outer ring are coated with fiber-reinforced composite material. （２）前記繊維強化複合材料がガラス繊維系複合材料で
ある請求項１の電食防止転がり軸受。(2) The electrolytic corrosion-preventing rolling bearing according to claim 1, wherein the fiber-reinforced composite material is a glass fiber-based composite material. （３）熱硬化性樹脂を含浸させたロービング状ガラス繊
維をフィラメントワインディング法により軸受外径に巻
き付けて所定の厚さにした後、硬化処理をする請求項２
の電食防止転がり軸受の製造方法。(3) A roving-shaped glass fiber impregnated with a thermosetting resin is wound around the outer diameter of the bearing by a filament winding method to a predetermined thickness, and then hardening treatment is performed.
A manufacturing method for anti-electrolytic corrosion rolling bearings. （４）前記繊維強化複合材料がアラミド繊維系複合材料
である請求項１の電食防止転がり軸受。(4) The electrolytic corrosion-preventing rolling bearing according to claim 1, wherein the fiber-reinforced composite material is an aramid fiber-based composite material. （５）熱硬化性樹脂を含浸させたアラミド繊維をフィラ
メントワインディング法により軸受外径に巻き付けて所
定の厚さにした後、硬化処理をする請求項４の電食防止
転がり軸受の製造方法。(5) The method for manufacturing an electrolytic corrosion-preventing rolling bearing according to claim 4, wherein aramid fibers impregnated with a thermosetting resin are wound around the outer diameter of the bearing by a filament winding method to a predetermined thickness and then hardened. （６）外輪の端面に外輪外径より小径の突部を有する治
具をあてがって、この治具突部と外輪の端面との間の環
状の凹所に繊維を巻き付ける請求項３または５の電食防
止転がり軸受の製造方法。(6) A jig having a protrusion with a smaller diameter than the outer diameter of the outer ring is applied to the end face of the outer ring, and the fibers are wound in an annular recess between the jig protrusion and the end face of the outer ring. Manufacturing method for anti-electrolytic corrosion rolling bearings.
JP2105944A 1990-04-20 1990-04-20 Anti-corrosion rolling bearing and method of manufacturing the same Expired - Fee Related JP2950576B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2105944A JP2950576B2 (en) 1990-04-20 1990-04-20 Anti-corrosion rolling bearing and method of manufacturing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2105944A JP2950576B2 (en) 1990-04-20 1990-04-20 Anti-corrosion rolling bearing and method of manufacturing the same

Publications (2)

Publication Number Publication Date
JPH044311A true JPH044311A (en) 1992-01-08
JP2950576B2 JP2950576B2 (en) 1999-09-20

Family

ID=14420960

Family Applications (1)

Application Number Title Priority Date Filing Date
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Country Status (1)

Country Link
JP (1) JP2950576B2 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994020201A1 (en) * 1993-03-01 1994-09-15 General Signal Corporation Mixer systems
US5358338A (en) * 1992-05-28 1994-10-25 Nippon Thompson Co., Ltd. Linear motion rolling guide unit with insulating members
US5375933A (en) * 1990-03-26 1994-12-27 Ntn Corporation Rolling contact bearing protected against electrolytic corrosion
WO2010108481A1 (en) * 2009-03-27 2010-09-30 Schaeffler Technologies Gmbh & Co. Kg Bearing race having electrical insulation and method for producing the same
WO2012065898A1 (en) * 2010-11-18 2012-05-24 Schaeffler Technologies AG & Co. KG Bearing ring
JP2016156394A (en) * 2015-02-23 2016-09-01 株式会社ジェイテクト Bearing ring and method for manufacturing the same
JP2017219177A (en) * 2016-06-10 2017-12-14 日本精工株式会社 Uniaxial actuator

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5375933A (en) * 1990-03-26 1994-12-27 Ntn Corporation Rolling contact bearing protected against electrolytic corrosion
US5358338A (en) * 1992-05-28 1994-10-25 Nippon Thompson Co., Ltd. Linear motion rolling guide unit with insulating members
WO1994020201A1 (en) * 1993-03-01 1994-09-15 General Signal Corporation Mixer systems
US5368390A (en) * 1993-03-01 1994-11-29 General Signal Corporation Mixer systems
WO2010108481A1 (en) * 2009-03-27 2010-09-30 Schaeffler Technologies Gmbh & Co. Kg Bearing race having electrical insulation and method for producing the same
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