JPS63259216A - Rolling bearing - Google Patents
Rolling bearingInfo
- Publication number
- JPS63259216A JPS63259216A JP9324287A JP9324287A JPS63259216A JP S63259216 A JPS63259216 A JP S63259216A JP 9324287 A JP9324287 A JP 9324287A JP 9324287 A JP9324287 A JP 9324287A JP S63259216 A JPS63259216 A JP S63259216A
- Authority
- JP
- Japan
- Prior art keywords
- insulating sheet
- rolling bearing
- inner ring
- outer ring
- 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.)
- Pending
Links
- 238000005096 rolling process Methods 0.000 title claims description 35
- 229920005989 resin Polymers 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims abstract description 7
- 230000002093 peripheral effect Effects 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 5
- 239000000853 adhesive Substances 0.000 claims description 2
- 230000001070 adhesive effect Effects 0.000 claims description 2
- 239000012811 non-conductive material Substances 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 abstract description 3
- 229910000831 Steel Inorganic materials 0.000 abstract description 2
- 239000011810 insulating material Substances 0.000 abstract description 2
- 239000007769 metal material Substances 0.000 abstract description 2
- 239000010959 steel Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract 2
- 239000000470 constituent Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000007751 thermal spraying Methods 0.000 description 3
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000005452 bending Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002989 phenols Chemical class 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Mounting Of Bearings Or Others (AREA)
- Rolling Contact Bearings (AREA)
Abstract
Description
【発明の詳細な説明】
a0発明の目的
(産業上の利用分野)
この発明に係る転がり軸受は、各種電気機器の回転軸を
支持する等、電流が流れる部分に設けて利用する。Detailed Description of the Invention a0 Object of the Invention (Industrial Field of Application) The rolling bearing according to the present invention is used by being installed in a part where an electric current flows, such as supporting the rotating shaft of various electrical devices.
(従来の技術)
車輌用主電動機の回転軸等、各種電気機器の回転軸を支
承する為に転がり軸受が使用されているが、電機機器の
回転軸支水用の転がり軸受の場合、対策を講じないと、
転がり軸□受自体に、帰路電流、モータ軸電流等の電流
が流れてしまう。(Prior art) Rolling bearings are used to support the rotating shafts of various electrical devices, such as the rotating shafts of vehicle main motors. If you don't take lessons,
Current such as return current and motor shaft current flows through the rolling shaft receiver itself.
転がり軸受に電流が流れた場合、電流の通路となる部分
の腐食が進む、所謂電蝕が発生して、転がり軸受の寿命
を著しく短縮してしまう。When current flows through a rolling bearing, corrosion progresses in the portion where the current passes, so-called galvanic corrosion, which significantly shortens the life of the rolling bearing.
この様な電蝕の発生を防止する為、転がり軸受を構成す
る外輪や内輪の表面に絶縁層を形成する事で、転がり軸
受に電流が流れない様にする技術が、特開昭59−10
3023号公報、実開昭60−85626号公報に開示
されている。In order to prevent the occurrence of such electrolytic corrosion, a technology was developed in JP-A-59-10 to prevent current from flowing through the rolling bearing by forming an insulating layer on the surface of the outer ring and inner ring that make up the rolling bearing.
It is disclosed in Japanese Utility Model Publication No. 3023 and Japanese Utility Model Application Publication No. 60-85626.
即ち、特開昭59−103023号公報に開示された技
術は、第4〜5図に示す様に、内輪1の外周面と外輪2
の内周面との間に形成される環状の隙間3内に複数の転
動体4.4を介在させた転がり軸受に於いて、内輪1の
内周面1a及び端面1b、lb(第5図の例)、或は外
輪2の外周面2a及び端面2b、2b(第4図の例)に
、無機化合物の溶射層5を形成する事で、転がり軸受を
構成する各部品に電流が流れない様にしている。That is, the technique disclosed in Japanese Patent Application Laid-Open No. 59-103023 has a structure in which the outer circumferential surface of the inner ring 1 and the outer ring 2 are
In a rolling bearing in which a plurality of rolling elements 4.4 are interposed in an annular gap 3 formed between the inner circumferential surface 1a and the end surfaces 1b and lb of the inner ring 1 (Fig. example), or by forming a thermally sprayed layer 5 of an inorganic compound on the outer circumferential surface 2a and end surfaces 2b, 2b (example shown in Fig. 4) of the outer ring 2, current will not flow through the parts that make up the rolling bearing. I'm doing it like that.
更に実開昭60−85626号公報には、無機化合物と
してセラミックを用い、このセラミック溶射層中の微細
な隙間に合成樹脂を含浸させる事で、絶縁性を向上させ
た技術が開示されている。Further, Japanese Utility Model Application Publication No. 60-85626 discloses a technique in which insulation is improved by using ceramic as an inorganic compound and impregnating minute gaps in the ceramic sprayed layer with a synthetic resin.
(発明が解決しようとする問題点)
ところが、上述の様な従来の絶縁型の転がり軸受の場合
、内輪1の内周面1a及び端面tb。(Problems to be Solved by the Invention) However, in the case of the conventional insulated rolling bearing as described above, the inner peripheral surface 1a and end surface tb of the inner ring 1.
1bや、外輪2の外周面2a′ELび端面2b。1b, the outer peripheral surface 2a'EL of the outer ring 2, and the end surface 2b.
2bに絶縁性の溶射層5を形成する作業が面倒で、しか
も溶射層5を構成するセラミック自体高価である為、転
がり軸受自体、高価になる事が避けられなかった。The process of forming the insulating thermal sprayed layer 5 on the thermal sprayed layer 5 is troublesome, and the ceramic forming the thermal sprayed layer 5 itself is expensive, so the rolling bearing itself inevitably becomes expensive.
更に、セラミック溶射に於いては、溶射時に溶射装置に
一部である所謂ガンの内側の金属が削り取られる事でセ
ラミック中に混入した金属粉末が、溶射層中に存在する
為、溶射層の絶縁性が必ずしも十分とは言えなかった。Furthermore, in ceramic thermal spraying, the metal inside the so-called gun, which is a part of the thermal spraying equipment, is scraped off during thermal spraying, and the metal powder mixed into the ceramic is present in the thermal sprayed layer, so the insulation of the thermal sprayed layer is affected. Sex was not always sufficient.
本発明の転がり軸受は、上述の様な不都合を解消するも
のである。The rolling bearing of the present invention eliminates the above-mentioned disadvantages.
b0発明の構成
(問題を解決するための手段)
本発明の転がり軸受は、従来の転がり軸受の場合と同様
に、内輪の外周面と外輪の内周面との間に形成される環
状の隙間内に複数の転動体を介在させ、上記内輪と外輪
との相対的回動を自在としている。b0 Structure of the Invention (Means for Solving the Problem) The rolling bearing of the present invention, as in the case of conventional rolling bearings, has an annular gap formed between the outer peripheral surface of the inner ring and the inner peripheral surface of the outer ring. A plurality of rolling elements are interposed therein to allow relative rotation between the inner ring and the outer ring.
更に、本発明の転がり軸受に於いては、上記内輪の内周
面及び端面と、外輪の外周面及び端面との少なくとも一
方の面を、非導電性材料により造られた布状物にレジン
を含浸させた絶縁シートで覆っている。Furthermore, in the rolling bearing of the present invention, at least one of the inner peripheral surface and end surface of the inner ring and the outer peripheral surface and end surface of the outer ring is coated with resin on a cloth-like material made of a non-conductive material. Covered with an impregnated insulation sheet.
(作 用)
上述の様に構成される本発明の転がり軸受が、回転軸等
を回転自在に支承する際の作用自体は、従来からの転が
り軸受と同様である。(Function) The function itself when the rolling bearing of the present invention configured as described above rotatably supports a rotating shaft or the like is the same as that of a conventional rolling bearing.
但し、本発明の転がり軸受の場合、内輪の内周面及び端
面と、外輪の外周面及び端面との少なくとも一方6面が
絶縁シートで覆われている為、転がり軸受を構成する各
部品に電流が流れる事がなく、電蝕によって上記各部品
の一部に著しい腐食が発生する事がない。However, in the case of the rolling bearing of the present invention, at least one of six surfaces, the inner circumferential surface and end surface of the inner ring, and the outer circumferential surface and end surface of the outer ring, is covered with an insulating sheet. There is no flow, and significant corrosion does not occur in some of the above parts due to electrolytic corrosion.
(実施例)
次に、図示の実施例を説明しつつ、本発明を更に詳しく
説明する。(Example) Next, the present invention will be explained in more detail while explaining the illustrated embodiment.
第1〜2図は本発明の第一実施例を示しており、第1図
は転がり軸受を構成する内輪の断面図、第2図は第1図
のA矢視図である。1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a sectional view of an inner ring constituting a rolling bearing, and FIG. 2 is a view taken in the direction of arrow A in FIG. 1.
軸受鋼等の金属材料により短円筒状に造られた内輪1の
内周面1aと両端面tb、tbとには、絶縁シート6が
貼着されて、各面1a、1bが覆われている。An insulating sheet 6 is adhered to the inner peripheral surface 1a and both end surfaces tb, tb of the inner ring 1, which is made of a metal material such as bearing steel and has a short cylindrical shape, to cover each surface 1a, 1b. .
この絶縁シート6は、テトラフルオロエチレン(TFE
)等の絶縁材料製のフィラメントを編組して成る厚さ0
.3〜0.6mm程度の布状物に、ブチラール変性フェ
ノール等のレジンを含浸させ、更に加圧してレジンをモ
ノフィラメント中の微小隙間にも含浸させてから乾燥さ
せて、厚さを例えば0.4mai程度としたものである
。This insulating sheet 6 is made of tetrafluoroethylene (TFE).
), etc., made of braided filaments made of insulating material with a thickness of 0
.. A cloth-like material of about 3 to 0.6 mm is impregnated with a resin such as butyral-modified phenol, and further pressurized to impregnate the resin into the minute gaps in the monofilament, and then dried to a thickness of, for example, 0.4 ma. It is based on the degree.
この様な絶縁シート6は、接着剤により、或は絶縁シー
ト6を貼着すべき面に、例えば60〜80℃程度に加熱
しつつ、例えば100 kgf/cm2の力で押圧する
事で、内輪1の内周面1aと両端面1b、lbとに貼着
するが、内周面1aからはみ出て、両端面1b、lbを
覆う部分には、等間隔に多数の切目7.7を形成する事
で、内周面1aからのはみ出し部分8を、外周方向に折
り曲げ、上記両端面1b、1bを覆える様にしている。Such an insulating sheet 6 can be attached to the inner ring by using an adhesive or by pressing the surface to which the insulating sheet 6 is to be attached with a force of, for example, 100 kgf/cm2 while heating it to about 60 to 80°C. 1, but a large number of cuts 7.7 are formed at equal intervals in the portion that protrudes from the inner peripheral surface 1a and covers both end surfaces 1b, lb. Therefore, the protruding portion 8 from the inner circumferential surface 1a is bent in the outer circumferential direction so as to cover both end surfaces 1b, 1b.
切目7.7部分に形成される隙間部分9.9には、必要
に応じて、絶縁シート6の貼着後、レジンを充填して、
この隙間部分9.9の絶縁を図る。If necessary, the gap 9.9 formed at the cut 7.7 is filled with resin after pasting the insulating sheet 6.
This gap portion 9.9 is insulated.
次に、第3図は本発明の第二実施例を示している。Next, FIG. 3 shows a second embodiment of the present invention.
本実施例の場合、転がり軸受を構成する外輪2の外周面
2aと両端面2b、2bとを、絶縁シート6で覆ってい
る。In the case of this embodiment, the outer peripheral surface 2a and both end surfaces 2b, 2b of the outer ring 2 constituting the rolling bearing are covered with an insulating sheet 6.
絶縁シート6の材質は、前記第一実施例と同様であるが
、絶縁シート6の両側で、上記外周面2aからはみ出し
た、はみ出し部分10は、外周面2aから内周方向に折
り曲げる事で、外輪2の両端面2b、2bを覆っている
。図示は省略したが、上記はみ出し部分10には■字形
の切り込みを等間隔で多数形成して、内周方向に折り曲
げた事で外輪2の両端面2b、2bを覆ったはみ出し部
分10に、しわが寄らない様にしている。The material of the insulating sheet 6 is the same as that of the first embodiment, but the protruding portions 10 protruding from the outer circumferential surface 2a on both sides of the insulating sheet 6 are bent from the outer circumferential surface 2a in the inner circumferential direction. It covers both end surfaces 2b, 2b of the outer ring 2. Although not shown in the drawings, a large number of ■-shaped notches are formed at equal intervals in the protruding portion 10, and by bending it in the inner circumferential direction, the protruding portion 10 that covers both end surfaces 2b, 2b of the outer ring 2 is formed. I try not to get too close to myself.
以上に述べた様に、内周面1aと両端面1b、1bとを
絶縁シート6により覆った内輪1、或は外周面2aと両
端面2b、2bとを絶縁シート6により覆った外輪2は
、従来から広く知られた転がり軸受と同様に組み立てら
れて使用されるが、上記絶縁シート6の存在により、構
成各部品に電流が流れる事を防止出来る。As described above, the inner ring 1 has the inner circumferential surface 1a and both end surfaces 1b, 1b covered with the insulating sheet 6, or the outer ring 2 has the outer circumferential surface 2a and both end surfaces 2b, 2b covered with the insulating sheet 6. Although it is assembled and used in the same manner as a conventionally well-known rolling bearing, the presence of the insulating sheet 6 prevents current from flowing through each component.
尚、上述の各実施例に於いては、内輪1の内周面fa、
或は外輪2の外周面2aからはみ出したはみ出し部分8
.10を折り曲げる事で、各端面Ib、2bを覆う様に
しているが、この様に端面Ib、2bを覆う絶縁シート
6は、内周面1a、或は外周面2aを覆う部分とは別体
としても良い。In each of the above embodiments, the inner circumferential surface fa of the inner ring 1,
Or a protruding portion 8 protruding from the outer peripheral surface 2a of the outer ring 2
.. 10 is bent to cover each end surface Ib, 2b, but the insulating sheet 6 that covers the end surfaces Ib, 2b in this way is separate from the part that covers the inner circumferential surface 1a or the outer circumferential surface 2a. It's good as well.
又、各面を絶縁シート6で覆う事で、転がり軸受の寸法
が不定となる場合は、この絶縁シート6の貼着後、絶縁
シート6の表面を研磨する。If the dimensions of the rolling bearing become undefined by covering each surface with the insulating sheet 6, the surface of the insulating sheet 6 is polished after the insulating sheet 6 is attached.
C6発明の効果
本発明の転がり軸受は、以上に述べた通り構成され作用
するが、布状物にレジンを含浸させ、更に乾燥させた絶
縁シート6は、比較的安価に得られる為、電動機等、電
流が流れる部分に装着しても電蝕が発生する事のない、
電蝕防止型の転がり軸受の製作費の低廉化と信頼性の向
上とを図る事が出来る。C6 Effects of the Invention The rolling bearing of the present invention is configured and operates as described above, but since the insulating sheet 6, which is a cloth-like material impregnated with resin and further dried, can be obtained at a relatively low cost, it is suitable for electric motors, etc. , will not cause galvanic corrosion even if installed in a part where electric current flows.
It is possible to reduce the manufacturing cost and improve the reliability of a rolling bearing that prevents electrolytic corrosion.
第1〜2図は本発明の第一実施例を示しており、第1図
は転がり軸受を構成する内輪の断面図、第2図は第1図
のA矢視図、第3図は本考案の第二実施例を示す外輪の
断面図、第4〜5図は従来の転がり軸受の2例を示す、
それぞれ部分断面図である。
1:内輪、1a:内周面、1b:端面、2:外輪、2a
:外周面、2b:端面、3:隙間、4:転動体、5:溶
射層、6:絶縁シート、7:切目、8:はみ出し部分、
9:隙間部分、10:はみ出し部分。1 and 2 show a first embodiment of the present invention, in which FIG. 1 is a sectional view of an inner ring constituting a rolling bearing, FIG. 2 is a view taken in the direction of arrow A in FIG. 1, and FIG. A sectional view of an outer ring showing a second embodiment of the invention, and Figures 4 and 5 show two examples of conventional rolling bearings.
Each is a partial sectional view. 1: Inner ring, 1a: Inner peripheral surface, 1b: End surface, 2: Outer ring, 2a
: outer peripheral surface, 2b: end surface, 3: gap, 4: rolling element, 5: sprayed layer, 6: insulation sheet, 7: cut, 8: protruding part,
9: Gap portion, 10: Protruding portion.
Claims (3)
環状の隙間内に複数の転動体を介在させた転がり軸受に
於いて、上記内輪の内周面及び端面と、外輪の外周面及
び端面との少なくとも一方の面を、非導電性材料により
造られた布状物にレジンを含浸させた絶縁シートで覆っ
た事を特徴とする、転がり軸受。(1) In a rolling bearing in which a plurality of rolling elements are interposed in an annular gap formed between the outer circumferential surface of the inner ring and the inner circumferential surface of the outer ring, the inner circumferential surface and end surface of the inner ring and the outer ring A rolling bearing characterized in that at least one of the outer peripheral surface and end surface of the bearing is covered with an insulating sheet made of a cloth-like material made of a non-conductive material and impregnated with resin.
の範囲第1項に記載の転がり軸受。(2) The rolling bearing according to claim 1, wherein the insulating sheet is attached with an adhesive.
された、特許請求の範囲第1項に記載の転がり軸受。(3) The rolling bearing according to claim 1, wherein the insulating sheet is attached by being heated and pressurized.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9324287A JPS63259216A (en) | 1987-04-17 | 1987-04-17 | Rolling bearing |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP9324287A JPS63259216A (en) | 1987-04-17 | 1987-04-17 | Rolling bearing |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS63259216A true JPS63259216A (en) | 1988-10-26 |
Family
ID=14077047
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP9324287A Pending JPS63259216A (en) | 1987-04-17 | 1987-04-17 | Rolling bearing |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS63259216A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013512400A (en) * | 2009-11-30 | 2013-04-11 | シェフラー テクノロジーズ アクチエンゲゼルシャフト ウント コンパニー コマンディートゲゼルシャフト | Electrically and / or thermally insulating rolling bearing |
JP2017020649A (en) * | 2015-05-27 | 2017-01-26 | ケイドン コーポレイションKaydon Corporation | Flexible insulation liner for bearing |
-
1987
- 1987-04-17 JP JP9324287A patent/JPS63259216A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2013512400A (en) * | 2009-11-30 | 2013-04-11 | シェフラー テクノロジーズ アクチエンゲゼルシャフト ウント コンパニー コマンディートゲゼルシャフト | Electrically and / or thermally insulating rolling bearing |
JP2017020649A (en) * | 2015-05-27 | 2017-01-26 | ケイドン コーポレイションKaydon Corporation | Flexible insulation liner for bearing |
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