JPS59103023A - Electric corrosion inhibitive type rolling bearing - Google Patents

Electric corrosion inhibitive type rolling bearing

Info

Publication number
JPS59103023A
JPS59103023A JP57210644A JP21064482A JPS59103023A JP S59103023 A JPS59103023 A JP S59103023A JP 57210644 A JP57210644 A JP 57210644A JP 21064482 A JP21064482 A JP 21064482A JP S59103023 A JPS59103023 A JP S59103023A
Authority
JP
Japan
Prior art keywords
coating film
rolling bearing
insulating coating
boundary
arcuated
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
Application number
JP57210644A
Other languages
Japanese (ja)
Inventor
Toshio Suzuki
鈴木　寿雄
Nobuyoshi Matsumura
松村　信義
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.)
NSK Ltd
Original Assignee
NSK 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 NSK Ltd filed Critical NSK Ltd
Priority to JP57210644A priority Critical patent/JPS59103023A/en
Publication of JPS59103023A publication Critical patent/JPS59103023A/en
Pending 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
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/52—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions
    • 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
    • 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
    • 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
    • F16C2240/00—Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40—Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/60—Thickness, e.g. thickness of coatings

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mounting Of Bearings Or Others (AREA)
  • Motor Or Generator Frames (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)

Abstract

PURPOSE:To achieve an electric corrosion inhibition with a strong coating film, by constituting a boundary surface between the engaging peripheral surface of bearing and a chamfered surface in a slightly tapered or arcuated shape and by spraying an insulating coating film of inorganic compound over the engaging surface. CONSTITUTION:A boundary 13 between the outer diameter surface 11 and the chamfered surface 12 of outer ring 1 is constituted in a slightly tapered surface or in an arcuated surface of increased curving radius for ensuring a smooth connection. An insulating coating film 4 of inorganic compound is defined with the thickness of about 0.1-3.0mm. over an engaging surface by spraying, and finished to a predetermined size by grinding. Because the tapered or arcuated surface has the coating film thicker than that of prior art, and consequently the mechanical strength better than before, the coating film is less subjected to damage when brought into collision with other member at the time of installation. Even if the coating film is partially peeled off at that time, it can still maintain the film thickness necessary for ensuring an insulation, and thus an electric insulating characteristic can be adequately preserved.

Description

【発明の詳細な説明】 この発明は、電流の通過によって生ずる電蝕を防止する
ために、ころがり軸受のはめあい面に絶縁被膜を形成し
た電蝕防止形ころがり軸受に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an anti-electrolytic rolling bearing in which an insulating coating is formed on the fitting surface of the rolling bearing in order to prevent electrolytic corrosion caused by the passage of electric current.

電気機器に使用される軸受、例えば車輌主電動機用軸受
においては、車体からの帰路電流およびモータ軸電流が
流れるために、電蝕発生の問題がある。これを晴ぐ方法
としては、接地ブラシ（車体からの帰路電流のバイパス
）や、軸電流バイパス、あるいは軸受ハウジング取付部
の絶縁等が実施されているが１．、改造の困難さ、コス
ト面の問題等から、軸受自体に絶縁機能をもたせること
が要望されている。この要望に添うものとして、出願人
は先に特願昭５３−８０５４９．名称「電食防止形ころ
がり軸受」を出願しているが、との電食防止形ころがり
軸受においても、まだ゛絶縁に関して、内径面、外径面
と面取り部の境界付近の絶縁被膜厚さが確保し難いため
絶縁性能が安定しないと云う問題があり、絶縁被膜その
ものもベーキングやコーティングしたものでは強度が不
十分で、軸受を相手部材に組込むとき、絶縁被膜が破損
し、絶縁不良になる心配がある。Bearings used in electrical equipment, such as bearings for vehicle main motors, have the problem of electrolytic corrosion due to the flow of return current from the vehicle body and motor shaft current. Methods to solve this problem include using a grounding brush (bypassing the return current from the vehicle body), bypassing the shaft current, or insulating the bearing housing mounting part. Due to the difficulty of modification, cost issues, etc., it is desired that the bearing itself has an insulating function. In order to meet this request, the applicant previously filed Japanese Patent Application No. 53-80549. Although an application has been filed for the name "electrolytic corrosion-proof rolling bearing," there are still problems with the insulation coating thickness near the boundary between the inner diameter surface, outer diameter surface, and chamfered part. There is a problem that the insulation performance is unstable because it is difficult to secure it, and the insulation coating itself is not strong enough even if it is baked or coated, so when the bearing is assembled into a mating component, there is a risk that the insulation coating will be damaged and lead to poor insulation. There is.

この発明は、上記の欠点を除去するためになされたもの
で、ころがり軸受のはめあい面（このはめあい面は相手
部材と接触する周面、面取り部、平面を含む）の周面と
面取り部との境界面はゆるいテーバ状または円弧状とし
、前記はめあい面に溶射による無機化合物の絶縁被膜が
形成され、十分な被膜強度を有することを特徴とする電
蝕防止形ころがり軸受である。This invention was made in order to eliminate the above-mentioned drawbacks, and the fitting surface of the rolling bearing (this fitting surface includes the circumferential surface that contacts the mating member, the chamfered portion, and the flat surface) and the chamfered portion. This is an electrolytic corrosion-proof rolling bearing characterized in that the boundary surface has a loose tapered or arcuate shape, and an insulating coating of an inorganic compound is formed by thermal spraying on the fitting surface, and has sufficient coating strength.

次にこの発明の第１の実施例を図を参照しながら説明す
る。■はころがり軸受の外輪、２は内輪、３は転動体と
しての円筒ころを示すものであり、この実施例において
は、円筒ころ軸受の外輪はめあ〜・面にのみ無機化合物
の絶縁被膜を形成した場合である。前記外輪における外
径面１１と面ホり部１２との境界面１３は、ゆるいテー
パ面あるいは曲率半径の大きい円弧面となっており、外
径面１１と面取り部１２の接続が清らかになっている。Next, a first embodiment of the present invention will be described with reference to the drawings. ■ indicates the outer ring of the rolling bearing, 2 indicates the inner ring, and 3 indicates the cylindrical roller as the rolling element. In this example, an insulating coating of an inorganic compound is formed only on the surface where the outer ring of the cylindrical roller bearing fits. This is the case. The boundary surface 13 between the outer diameter surface 11 and the chamfered portion 12 in the outer ring is a gently tapered surface or a circular arc surface with a large radius of curvature, so that the connection between the outer diameter surface 11 and the chamfered portion 12 is clear. There is.

上記のはめあい面には、例えば溶射によって、厚さ０．
１〜３．０ｍｍ程度の無機化合物の絶縁被膜４が形成さ
れ、研削加工によって所定の寸法に仕上げられている。The above-mentioned fitting surface is coated with a thickness of 0.5 mm by thermal spraying, for example.
An insulating coating 4 made of an inorganic compound with a thickness of about 1 to 3.0 mm is formed and finished to a predetermined size by grinding.

この軸受のテーパ面あるいは曲率半径の大きい円弧面に
おいては、絶縁被膜４の厚さが、従来の電蝕防止形ころ
がり軸受の境界面におが太きいために、軸受の取付時に
おいて、相手部材と特に強く接触しても被膜が破損し難
く、かりに表層部の被膜が一部削りとられても、なお絶
縁に必要な被膜厚さは確保されており、十分な絶縁機能
をもっている。On the tapered surface of this bearing or the circular arc surface with a large radius of curvature, the thickness of the insulating coating 4 is thicker than that of the conventional anti-electrolytic rolling bearing. The coating is not easily damaged even if it comes into particularly strong contact with the surface, and even if some of the surface layer of the coating is scraped off, the coating thickness necessary for insulation is still maintained and has sufficient insulation function.

次に示す第２の実施例は玉軸受を対象としたもので、５
は外輪、６は内輪、７は玉で、内輪６のはめあい面に無
機化合物の絶縁被膜を形成したものである。内輪６の内
径面６１と面取り部６２との境界面６３は、ゆるいテー
パ面あるいは曲率半径の大きい円弧面となっており、内
径面６１と面取り物６２はなめらかな面で接続している
。この玉軸受の場合にも前記第１の実施例同様、テーパ
面あるいは円弧面における絶縁被膜の厚さは、従来の電
蝕防止ころがり軸受の境界面における厚さより厚（なり
、前記同様の効果が得られる。The second embodiment shown below is aimed at ball bearings.
6 is an outer ring, 6 is an inner ring, 7 is a ball, and the fitting surface of the inner ring 6 is coated with an insulating coating of an inorganic compound. A boundary surface 63 between the inner diameter surface 61 of the inner ring 6 and the chamfer 62 is a gently tapered surface or an arcuate surface with a large radius of curvature, and the inner diameter surface 61 and the chamfer 62 are connected by a smooth surface. In the case of this ball bearing, as in the first embodiment, the thickness of the insulating coating on the tapered surface or the arcuate surface is thicker than the thickness on the boundary surface of the conventional anti-electrolytic rolling bearing, and the same effect as described above can be obtained. can get.

上記二つの実施例においては、ころがり軸受の一方のは
めあい面にのみ絶縁被膜を形成したものについて説明し
たが、外径はめあい面と内径はめあい面の両者に絶縁被
膜を形成すれば、絶縁効果は更に確実なものとなる。In the above two embodiments, the insulating coating was formed only on one fitting surface of the rolling bearing, but if the insulating coating is formed on both the outer fitting surface and the inner fitting surface, the insulation effect can be further improved. It becomes certain.

この発明の電蝕防止形ころがり軸受は、前記のように、
はめあい面における局面と面取り部との境界面をゆるい
テーパ面あるいは曲率半径の大きい円弧面としたので、
その部分における絶縁被膜の厚さは、従来の電蝕防止形
ころがり軸受の境界二面における厚さより厚くなり、従
来懸念されていた境界面における絶縁機能について十分
保障でき、かりに軸受取付時に絶縁被膜が多少削り取ら
れることがあっても、なお絶縁に必要な凰さは確保され
るので、絶縁に対して有効な機能を有している。また絶
縁被膜は無機化合物を使用しているので絶縁効果が大き
く、絶縁被膜の接着形成な溶射により行っているため、
ベーキングやコーティングによって行った場合より接着
強度が犬である。As mentioned above, the galvanic corrosion-resistant rolling bearing of this invention has the following features:
Since the interface between the curved surface and the chamfer on the fitting surface is a gently tapered surface or an arcuate surface with a large radius of curvature,
The thickness of the insulating coating at that part is thicker than the thickness at the two boundary surfaces of conventional anti-galvanic rolling bearings, and the insulation function at the interface, which was a concern in the past, can be sufficiently guaranteed, and the insulating coating can be removed when the bearing is installed. Even if it is scraped off to some extent, the thickness necessary for insulation is still maintained, so it has an effective function for insulation. In addition, since the insulating coating uses an inorganic compound, it has a great insulation effect, and since it is done by thermal spraying to form an adhesive of the insulating coating,
The bond strength is greater than if done by baking or coating.

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

第１図はこの発明の第１の実施例を示す要部断面図、第
２図は同じく第２の実施例を示す要部の断面図である。 符号の説明 ■は外輪、２は内輪、３はころ、４は絶縁被膜、５は外
輪、６は内輪、７は玉、１１は外径面、１２は面取り部
、１３は境界面、６１は内径面、６２は面取り部、６３
は境界面。 特許出願人　　　日本精工株式会社FIG. 1 is a sectional view of a main part showing a first embodiment of the present invention, and FIG. 2 is a sectional view of a main part showing a second embodiment. Explanation of the symbols ■ is the outer ring, 2 is the inner ring, 3 is the roller, 4 is the insulation coating, 5 is the outer ring, 6 is the inner ring, 7 is the ball, 11 is the outer diameter surface, 12 is the chamfered part, 13 is the boundary surface, 61 is the Inner diameter surface, 62 is chamfered portion, 63
is the boundary surface. Patent applicant: NSK Ltd.

Claims (1)

【特許請求の範囲】[Claims] ころがり軸受の内輪はめあい面または外輪はめあい面、
あるいは内輪はめあい面と外輪はめあい面の両はめあい
面に絶縁被膜が形成された電蝕防止形ころがり軸受にお
いて、前記内輪はめあい面の局面または外輪はめあい面
の周面と面取り部との境界面はゆるいテーバ面あるいは
曲率半径の大きい円弧面を呈し、少くとも一方の前記は
めあい面に溶射による無機化合物の絶縁被膜を有する電
蝕防止形ころがり軸受。Inner ring fitting surface or outer ring fitting surface of a rolling bearing,
Alternatively, in an anti-galvanic rolling bearing in which an insulating coating is formed on both the inner ring fitting surface and the outer ring fitting surface, the curved surface of the inner ring fitting surface or the boundary surface between the circumferential surface of the outer ring fitting surface and the chamfer has a loose taper. An anti-electrolytic corrosion rolling bearing having a surface or an arcuate surface with a large radius of curvature, and having an insulating coating of an inorganic compound formed by thermal spraying on at least one of the fitting surfaces.
JP57210644A 1982-12-02 1982-12-02 Electric corrosion inhibitive type rolling bearing Pending JPS59103023A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57210644A JPS59103023A (en) 1982-12-02 1982-12-02 Electric corrosion inhibitive type rolling bearing

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57210644A JPS59103023A (en) 1982-12-02 1982-12-02 Electric corrosion inhibitive type rolling bearing

Publications (1)

Publication Number Publication Date
JPS59103023A true JPS59103023A (en) 1984-06-14

Family

ID=16592717

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57210644A Pending JPS59103023A (en) 1982-12-02 1982-12-02 Electric corrosion inhibitive type rolling bearing

Country Status (1)

Country Link
JP (1) JPS59103023A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5059041A (en) * 1989-09-12 1991-10-22 Railway Technical Research Institute Electrical insulating bearing
JPH10225047A (en) * 1997-02-04 1998-08-21 Asmo Co Ltd Bearing structure of motor
EP1408249A1 (en) * 2002-10-08 2004-04-14 Ntn Corporation Rolling bearing protected against electrocorrosion
WO2011111188A1 (en) 2010-03-10 2011-09-15 三菱電機株式会社 Electric motor rotor, electric motor, air conditioner, and production method for electric motor rotor
JP2013141405A (en) * 2013-04-04 2013-07-18 Mitsubishi Electric Corp Electric motor and air conditioner
RU2599938C2 (en) * 2013-12-19 2016-10-20 Открытое акционерное общество Институт технологии и организации производства (ОАО НИИТ) Permanent part connection method
KR101867906B1 (en) * 2017-02-13 2018-06-18 (주)코리아인코어테크놀러지 Brush-less direct current motor and method for preventing electric corrosion thereof

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510111A (en) * 1978-07-04 1980-01-24 Nippon Seiko Kk Roller bearing for preventing electrolytic corrosion

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5510111A (en) * 1978-07-04 1980-01-24 Nippon Seiko Kk Roller bearing for preventing electrolytic corrosion

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5059041A (en) * 1989-09-12 1991-10-22 Railway Technical Research Institute Electrical insulating bearing
JPH10225047A (en) * 1997-02-04 1998-08-21 Asmo Co Ltd Bearing structure of motor
EP1408249A1 (en) * 2002-10-08 2004-04-14 Ntn Corporation Rolling bearing protected against electrocorrosion
WO2011111188A1 (en) 2010-03-10 2011-09-15 三菱電機株式会社 Electric motor rotor, electric motor, air conditioner, and production method for electric motor rotor
JP2013141405A (en) * 2013-04-04 2013-07-18 Mitsubishi Electric Corp Electric motor and air conditioner
RU2599938C2 (en) * 2013-12-19 2016-10-20 Открытое акционерное общество Институт технологии и организации производства (ОАО НИИТ) Permanent part connection method
KR101867906B1 (en) * 2017-02-13 2018-06-18 (주)코리아인코어테크놀러지 Brush-less direct current motor and method for preventing electric corrosion thereof

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