JPH062030Y2 - Anti-corrosion rolling bearing - Google Patents

Anti-corrosion rolling bearing

Info

Publication number
JPH062030Y2
JPH062030Y2 JP1988124258U JP12425888U JPH062030Y2 JP H062030 Y2 JPH062030 Y2 JP H062030Y2 JP 1988124258 U JP1988124258 U JP 1988124258U JP 12425888 U JP12425888 U JP 12425888U JP H062030 Y2 JPH062030 Y2 JP H062030Y2
Authority
JP
Japan
Prior art keywords
insulating layer
bearing
rolling bearing
peripheral surface
layer
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 - Lifetime
Application number
JP1988124258U
Other languages
Japanese (ja)
Other versions
JPH0246119U (en
Inventor
英彦 小野
健 堀内
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.)
Nippon Sharyo Ltd
Original Assignee
Nippon Sharyo 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 Nippon Sharyo Ltd filed Critical Nippon Sharyo Ltd
Priority to JP1988124258U priority Critical patent/JPH062030Y2/en
Publication of JPH0246119U publication Critical patent/JPH0246119U/ja
Application granted granted Critical
Publication of JPH062030Y2 publication Critical patent/JPH062030Y2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F16C33/583—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
    • F16C33/62—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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/24—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly
    • F16C19/26—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for radial load mainly with a single row of rollers
    • 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
    • F16C2202/00—Solid materials defined by their properties
    • F16C2202/30—Electric properties; Magnetic properties
    • 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
    • F16C2380/00—Electrical apparatus
    • F16C2380/26—Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)

Description

【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、例えば鉄道車両のモータ用軸受や車軸用軸受
として用いられる電食防止型の転がり軸受に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an electrolytic corrosion-preventing rolling bearing used as, for example, a motor bearing or an axle bearing of a railway vehicle.

〔従来の技術〕[Conventional technology]

鉄道車両のモータベアリングに用いられる転がり軸受
は、モータの電流を車輪からレールへ接地する接地用集
電装置が不完全な場合に、モータの電流が転がり軸受を
通って、車輪，レールへと接地するため、軸受の転動体
が外輪転走面または内輪転走面との間でスパークし、い
わゆる電食を生じて軸受の損耗を早めることがある。Rolling bearings used for motor bearings of railway vehicles are grounded to the wheels and rails through the rolling bearings when the grounding current collector that grounds the motor current to the rails is incomplete. Therefore, the rolling elements of the bearing may spark between the outer ring rolling surface or the inner ring rolling surface, causing so-called electrolytic corrosion and accelerating the wear of the bearing.

このため、例えば実開昭６０−８５６２６号公報に開示
される技術では、外輪の外周面と端面、及び内輪の内周
面と端面とに、それぞれセラミックスを溶射した絶縁層
を設け、該絶縁層に絶縁性の合成樹脂を含浸させた技術
が開示されている。Therefore, for example, in the technique disclosed in Japanese Utility Model Laid-Open No. 60-85626, an insulating layer formed by spraying ceramics is provided on each of the outer peripheral surface and the end surface of the outer ring and the inner peripheral surface and the end surface of the inner ring. There is disclosed a technique in which an insulating synthetic resin is impregnated.

〔考案が解決しようとする課題〕[Problems to be solved by the device]

上述の絶縁層は、セラミックス材料として、アルミナ，
グレイアルミナ，ジルコニア等が用いられるが、これら
材料は軸受材料に馴染みにくく、容易に付着しない。The above-mentioned insulating layer is made of alumina,
Gray alumina, zirconia, etc. are used, but these materials are difficult to adapt to bearing materials and do not easily adhere.

また、外輪外径に設けられる絶縁層は、溶射後にその外
周を、軸受箱の内径に合った所定の寸法精度に研削仕上
げされるが、これら絶縁層材料は硬く脆いため、寸法仕
上げのための研削工程に多大な加工数と時間とを要して
いた。更にこの軸受を軸受箱に嵌合する場合に、圧入に
よって絶縁層が剥離し易いという問題があった。In addition, the insulating layer provided on the outer diameter of the outer ring is ground and finished on its outer periphery with a predetermined dimensional accuracy that matches the inner diameter of the bearing box after thermal spraying.However, since these insulating layer materials are hard and brittle, The grinding process requires a great number of processes and a lot of time. Further, when the bearing is fitted in the bearing box, there is a problem that the insulating layer is easily peeled off by press fitting.

本考案は、かかる実情を背景にしてなされたもので、絶
縁層の溶射が容易で且つ剥離しにくく、また軸受箱に圧
入される外周面の研削加工も容易に行なえる電食防止型
の転がり軸受を提供することを目的としている。The present invention has been made against the background of such circumstances, and an electrolytic corrosion-preventing type rolling that facilitates thermal spraying of an insulating layer and is not easily peeled off, and can also easily grind the outer peripheral surface pressed into a bearing box. The purpose is to provide a bearing.

〔課題を解決するための手段〕[Means for Solving the Problems]

上述の目的を達成すたるめ、本考案の転がり軸受は、軸
受箱に嵌合される外輪の外周面若しくは該外周面から端
面に亙って絶縁層を設けた電食防止型転がり軸受におい
て、前記絶縁層の外面と、該絶縁層及び外輪外径との間
に、それぞれ金属層を形成したことを特徴とするもので
ある。In order to achieve the above object, the rolling bearing of the present invention is an electrolytic corrosion prevention type rolling bearing in which an insulating layer is provided on the outer peripheral surface of an outer ring fitted to a bearing box or from the outer peripheral surface to the end surface. It is characterized in that a metal layer is formed between the outer surface of the insulating layer and the outer diameter of the insulating layer and the outer ring.

〔実施例〕〔Example〕

以下、本考案の一実施例を図面に基づいて説明する。 An embodiment of the present invention will be described below with reference to the drawings.

転がり軸受１は、内輪２と外輪３との間に、複数のコロ
４を転動可能に配設した円筒コロ軸受で、外輪３の外周
面から両端面に亙って、金属層５，６との間に絶縁層７
を挟装した被覆層８が設けられている。The rolling bearing 1 is a cylindrical roller bearing in which a plurality of rollers 4 are rotatably arranged between an inner ring 2 and an outer ring 3, and the metal layers 5, 6 are formed from the outer peripheral surface of the outer ring 3 to both end surfaces thereof. Insulation layer 7 between
The coating layer 8 sandwiching the is provided.

上記金属層５，６は、それぞれ金属パウダを溶射して、
また絶縁層７は、アルミナやグレイアルミナ，ジルコニ
ア等のパウダを溶射してそれぞれ形成される。これら各
層５，６，７のコーティング厚さは、例えば本考案の転
がり軸受１を鉄道車両のモータ用軸受として使用する場
合に、内側の金属層５で0.1〜0.15mm，外側の金属層６
で0.3〜0.4mm（但し研削代0.15〜0.2mmを含む），また
絶縁層７で0.2〜0.3mm程度に設けられる。The metal layers 5 and 6 are formed by spraying metal powders,
The insulating layer 7 is formed by spraying powder of alumina, gray alumina, zirconia, or the like. The coating thickness of each of these layers 5, 6 and 7 is, for example, 0.1 to 0.15 mm in the inner metal layer 5 and the outer metal layer 6 when the rolling bearing 1 of the present invention is used as a bearing for a motor of a railway vehicle.
0.3 to 0.4 mm (including the grinding allowance 0.15 to 0.2 mm), and the insulating layer 7 is set to 0.2 to 0.3 mm.

金属層５，６は、セラミックスの絶縁層７に較べて充分
に軟かく、且つ変形能も大きいことから、絶縁層７のア
ンダコートとなる内側の金属層５では、溶射される絶縁
層７が付着し易くなり、またオーバーコートとなる外側
の金属層６は、外周の研削加工が容易に行なえて、所定
の寸法精度が出し易くなり、更に圧入による軸受箱への
嵌合にも、絶縁層７に剥離を生じない。Since the metal layers 5 and 6 are sufficiently soft and have a large deformability as compared with the ceramic insulating layer 7, in the inner metal layer 5 serving as the undercoat of the insulating layer 7, the insulating layer 7 to be sprayed is The outer metal layer 6 which is easily adhered and serves as an overcoat can be easily ground on the outer periphery to easily obtain a predetermined dimensional accuracy, and further, an insulating layer is used for fitting the bearing box by press fitting. No peeling occurs in 7.

また、溶射によって形成される各層５，６，７には、微
小な孔が存在するため、浸透性の良い接着剤を含浸さ
せ、これら各層５，６，７の密着力を増しながら、封孔
処理を行なうことも有効である。In addition, since each layer 5, 6, 7 formed by thermal spraying has minute holes, it is impregnated with an adhesive having good penetrability to increase the adhesion of each layer 5, 6, 7 and to seal the holes. It is also effective to perform processing.

尚、上記実施例では、被覆層８を、外輪３の外周面から
両端面に亙って形成したもので説明したが、被覆層を外
輪の外周面のみに設けてもよく、或いは内輪の内周面や
端面に設けてもよい。In the above embodiment, the coating layer 8 was described as being formed from the outer peripheral surface of the outer ring 3 to both end surfaces, but the coating layer may be provided only on the outer peripheral surface of the outer ring or inside the inner ring. It may be provided on the peripheral surface or the end surface.

また金属層は、上記実施例の如く、絶縁層がセラミック
ス材料において効果的であるが、本考案は特に絶縁層を
セラミックスに限定するものでなく、他の絶縁性材料を
用いても差支えない。Further, as for the metal layer, the insulating layer is effective in the ceramic material as in the above embodiment, but the present invention is not particularly limited to the insulating layer of ceramics, and other insulating materials may be used.

更に実施例で示した円筒コロ軸受以外に、玉軸受やニー
ドル軸受等の他の転がり軸受にも適用可能である。Further, in addition to the cylindrical roller bearing shown in the embodiment, it can be applied to other rolling bearings such as ball bearings and needle bearings.

〔考案の効果〕[Effect of device]

以上のように、本考案の電食防止型転がり軸受は、外輪
の外周面若しくは該外周面から端面に亙って、内外の金
属層の間に絶縁層を挟装して設けたから、絶縁層は、イ
ンナコートとなる内側の金属層により付着し易くなっ
て、溶射を短時間で容易に行なうことができる。As described above, the electrolytic corrosion-preventing rolling bearing of the present invention is provided with the insulating layer sandwiched between the inner and outer metal layers over the outer peripheral surface of the outer ring or the outer peripheral surface to the end surface. Is more easily adhered by the inner metal layer serving as the inner coat, and thermal spraying can be easily performed in a short time.

またアウタコートとなる外側の金属層により、絶縁層は
軸受箱へ圧入する場合にも剥離することがなく、更に外
周面の研削加工が精度良く容易に行なえる効果がある。Further, the outer metal layer serving as the outer coat prevents the insulating layer from peeling off even when it is press-fitted into the bearing box, and further has the effect that the outer peripheral surface can be ground accurately and easily.

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

図は本考案の一実施例を示す転がり軸受の要部拡大断面
図である。 １…電食防止型の転がり軸受、２…内輪 ３…外輪、４…コロ、５，６…金属層 ７…絶縁層、８…被覆層FIG. 1 is an enlarged cross-sectional view of a main part of a rolling bearing showing an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Electrolytic corrosion-preventive rolling bearing, 2 ... Inner ring 3 ... Outer ring, 4 ... Rollers, 5, 6 ... Metal layer 7 ... Insulating layer, 8 ... Coating layer

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 【請求項１】軸受箱に嵌着される外輪の外周面若しくは
該外周面から端面に亙って絶縁層を設けた電食防止型転
がり軸受において、前記絶縁層の外面と、該絶縁層及び
外輪外径との間に、それぞれ金属層を形成したこを特徴
とする電食防止型転がり軸受。1. An electrolytic corrosion-preventing rolling bearing having an outer peripheral surface of an outer ring fitted to a bearing box or an insulating layer extending from the outer peripheral surface to the end surface, wherein the outer surface of the insulating layer and the insulating layer and An anti-corrosion rolling bearing characterized in that a metal layer is formed between the outer ring and the outer diameter.
JP1988124258U 1988-09-22 1988-09-22 Anti-corrosion rolling bearing Expired - Lifetime JPH062030Y2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1988124258U JPH062030Y2 (en) 1988-09-22 1988-09-22 Anti-corrosion rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1988124258U JPH062030Y2 (en) 1988-09-22 1988-09-22 Anti-corrosion rolling bearing

Publications (2)

Publication Number Publication Date
JPH0246119U JPH0246119U (en) 1990-03-29
JPH062030Y2 true JPH062030Y2 (en) 1994-01-19

Family

ID=31373836

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1988124258U Expired - Lifetime JPH062030Y2 (en) 1988-09-22 1988-09-22 Anti-corrosion rolling bearing

Country Status (1)

Country Link
JP (1) JPH062030Y2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005133876A (en) 2003-10-31 2005-05-26 Ntn Corp Electrical corrosion prevention rolling bearing

Also Published As

Publication number Publication date
JPH0246119U (en) 1990-03-29

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