CN100419291C - Anti electrolytic corrosion bearing - Google Patents
Anti electrolytic corrosion bearing Download PDFInfo
- Publication number
- CN100419291C CN100419291C CNB2004100065394A CN200410006539A CN100419291C CN 100419291 C CN100419291 C CN 100419291C CN B2004100065394 A CNB2004100065394 A CN B2004100065394A CN 200410006539 A CN200410006539 A CN 200410006539A CN 100419291 C CN100419291 C CN 100419291C
- Authority
- CN
- China
- Prior art keywords
- isolation layer
- fitting surface
- foreign steamer
- aforementioned
- electrolytic corrosion
- 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 - Fee Related
Links
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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
- 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
- F16C37/00—Cooling of bearings
-
- 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
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- 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
- 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
- F16C19/525—Bearings with rolling contact, for exclusively rotary movement with devices affected by abnormal or undesired conditions related to temperature and heat, e.g. insulation
-
- 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
Abstract
To enhance the thermal radiation while securing the proper impact-proof and load bearing characteristics of an insulating layer. The insulating layer (5) is formed from an outer face (2a) of an outer ring (2) toward both end faces (2b). As a central part (2a2) of the outer face (2a) of the outer ring (2) is higher than both end parts (2a3) by a dimension [delta], a thickness (t1) at the central part (2a2) of the outer face (2a), of the insulating layer (5) is thinner than a thickness (t2) at both end parts (2a3) by the dimension [delta].
Description
Technical field
The present invention relates to a kind of Anti electrolytic corrosion bearing that prevents to produce galvanic corrosion at the contacting part of rail wheel and rotor, be used as the place of problem applicable to galvanic corrosion, for example rail truck with various industries such as motor and fan motors with the rotary bearing of being packed in the electric motor.
Background technique
Usually, the galvanic corrosion of rotary bearing is to generate potential difference between interior wheel and foreign steamer, and produces when flowing through electric current in bearing inside by rotor, and the durability of bearing is descended because of the galvanic corrosion of rotation surface.
Prevent measure as above-mentioned galvanic corrosion, known have a kind of at bearing foreign steamer and interior wheel on form the method (for example with reference to patent documentation 1～3) of the isolation layer that constitutes by resin and pottery.
In patent documentation 1,, form isolation layer (insulation film) by the polyphenylene sulfides that contains glass fibre (PPS) resin from water absorption character, anti-creep properties, high-temperature capability, formability aspect.
In patent documentation 2, in order to solve the problem of damaging anti-galvanic corrosion effect at the edge part deposit attachment of isolation layer (insulation film), the thickness of end face film that makes the rail wheel end face that covers insulation film is greater than the thickness of the surface film on the surface that covers rail wheel.
In patent documentation 3,, circumferential groove is set in the chamfered edge portion of foreign steamer external diameter face for the cracking resistance line of reinforced insulation layer (insulation film) to external force and impact force.
[patent documentation 1]
The spy of Japanese Patent Laid Open Publication opens flat 3-277818 communique.
[patent documentation 2]
The reality of Japanese Patent Laid Open Publication is opened flat 3-121222 communique.
[patent documentation 3]
The spy of Japanese Patent Laid Open Publication opens flat 9-88972 communique.
The resin material that forms isolation layer is compared with metallic material with stupalith, pyroconductivity is low, so having formed the Anti electrolytic corrosion bearing of isolation layer has at the inner heat that produces of bearing and is difficult to discharge to the outside, compare with the common bearing that does not form isolation layer, the temperature of rail wheel has the tendency of easy rising.Particularly under the situation that bearing at full speed turns round with anxious acceleration, the heating quantitative change of bearing inside is big, so require good to the character (thermal diffusivity) of outside release heat.
On the other hand, falling etc. isolation layer impact load in addition when using because of bearing sometimes, and when bearing is installed (chimeric) on case and axle sometimes can in addition bigger load at the end of the installation direction of isolation layer.Therefore, require isolation layer to have proper impact and withstand load.
Summary of the invention
Problem of the present invention is exactly to guarantee the proper impact and the withstand load of the isolation layer of Anti electrolytic corrosion bearing, and improves thermal diffusivity.
In order to solve above-mentioned problem, the invention provides the Anti electrolytic corrosion bearing of formed isolation layer on a kind of fitting surface that comprises at least one rail wheel in interior wheel, foreign steamer, the rotor between interior wheel and foreign steamer, wheel and the foreign steamer, wherein aforementioned fitting surface is that its central part swells than two end part, having an even surface of the isolation layer that forms at the fitting surface place, and the aforementioned dielectric layer formation that adopts the thickness of fitting surface central part to diminish than two end part.
Diminish relatively by the thickness of the isolation layer that makes fitting surface, can improve the thermal diffusivity of isolation layer, and the heating of bearing inside is discharged to the outside well by isolation layer efficient at central part.On the other hand, become big relatively, can guarantee the proper impact and the anti-load of isolation layer by the thickness of the isolation layer that makes fitting surface at two end part.
In addition, above-mentioned fitting surface be outer diametric plane at foreign steamer, be aperture surface at interior wheel.Usually, the outer diametric plane of foreign steamer is chimeric at case, and the aperture surface of interior wheel is chimeric at axle.The outer diametric plane of foreign steamer and the cooperation of case, the cooperation of the aperture surface of interior wheel and axle, can adopt Spielpassung, middle cooperate, interference fit (being pressed into) any.Isolation layer is formed at the outer diametric plane of foreign steamer and at least one place in the interior aperture surface of taking turns.When on foreign steamer, forming isolation layer, isolation layer only can be formed on the diametric plane outside, also can all form to end face from outer diametric plane.Equally, when on interior wheel, forming isolation layer, isolation layer only can be formed on aperture surface, also can from the aperture surface to the end face, all form.
As a kind of method that aforesaid thickness difference is set on the isolation layer of fitting surface, the central part of fitting surface is swelled than two end part.By adopting this formation, can on the isolation layer of fitting surface, form the difference of above-mentioned this thickness, and to make the external diameter (or internal diameter) of this isolation layer be homogeneous diameter.Whereby, can make the installment state of case and axle keep stable.
And, also can circumferential groove be set respectively at the central part and the two end part of fitting surface.By making this circumferential groove bury the part of isolation layer, can improve the peeling strength of isolation layer on axle direction.In addition, when isolation layer being formed into the end face of rail wheel, also can on this end face, form circumferential groove always.By making this circumferential groove bury the part of isolation layer, can improve the peeling strength of isolation layer on radial direction.
In the above-described configuration, also can be in the critical bight of the central part of fitting surface, axis formed less than the plane of inclination of 45 ° angle or to have the R face of curvature and chamfered edge is set.For example, when isolation layer is formed by injection moulding of resin material etc., by the resin shrinkage after being shaped, can produce stress in the inside of isolation layer, and this stress concentrates on easily on the isolation layer part that the critical bight with the fitting surface central part joins to the fitting surface center side.And, for example when on fitting surface, being pressed into counter-element (case and axle), can be to the weight (power of back-pressure Inbound) on the axle direction in addition of formed isolation layer on the fitting surface, and this weight concentrates on the isolation layer part that the critical bight with the fitting surface central part joins easily.By the chamfered edge that imposes above-mentioned shape in the critical bight of fitting surface central part, can relax to the weight of the isolation layer part of joining with this critical bight and concentrate, prevent from isolation layer, to produce be full of cracks.
In the present invention, the material as forming isolation layer can use resin material, rubber material, stupalith etc., but considers from aspects such as formability, cost-effectivenes, is good to use resin material.
Description of drawings
Figure 1 shows that the sectional drawing of Anti electrolytic corrosion bearing (zanjon ball bearing) about the 1st example of the present invention.
Figure 2 shows that sectional drawing about the Anti electrolytic corrosion bearing (roller bearing) of the 2nd example of the present invention.
Symbol description
1: interior wheel; 2: foreign steamer;
2a: outer diametric plane (fitting surface); 2a1: circumferential groove;
2a2: central part; 2a3: two end part;
2a4: chamfered edge; 2b: both ends of the surface;
2b1: circumferential groove; 3: ball (rotor);
4: retainer; 5: isolation layer;
5a: external diameter layer; 5b: facing layer;
11: interior wheel; 12: foreign steamer;
12a: outer diametric plane (fitting surface); 12a1: circumferential groove;
12a2: central part; 12a3: two end part;
12a4: chamfered edge; 13: cylindrical roller (rotor);
14: retainer 15: isolation layer;
T1, t2: thickness
Embodiment
Below, example of the present invention is described.
Figure 1 shows that the 1st example that the present invention is applicable to the zanjon ball bearing.Wheel 1, foreign steamer 2, several balls 3 between interior wheel 1 and foreign steamer 2 in comprising about the Anti electrolytic corrosion bearing of the 1st example, keep the retainer 4 of ball 3, formed isolation layer 5 on foreign steamer 2.
The fitting surface of foreign steamer 2, promptly outer diametric plane 2a utilizes at (central authorities of outer diametric plane 2a) axle direction circumferential groove 2a1 of forming of the position of distance about equally at interval respectively to the left and right from the axle direction center, by zoning is central part 2a2 and two end part 2a3, and central part 2a2 only swells δ (radial direction size) to two end part 2a3.
And, such as Fig. 1 (b) expansion expression, be provided with chamfered edge 2a4 in the critical bight of central part 2a2 and circumferential groove 2a1.In this example, chamfered edge 2a4 to be to form the angle θ less than 45 ° to axis, and for example the plane of inclination of θ=30 ° is set up.In addition, the R face that also can have curvature is provided with chamfered edge 2a4.
On the both ends of the surface 2b of foreign steamer 2, be formed with circumferential groove 2b1 respectively.
Under this example, isolation layer 5 can be by with resin material, and for example polyphenylene sulfides (PPS) is a main component, and forms with the resin material of therein glass fibre being allocated with certain proportion.The mould-forming method of this isolation layer 5 is not particularly limited, but is good with encapsulation molding.
And in this example, isolation layer 5 is formed into both ends of the surface 2b from the outer diametric plane 2a of foreign steamer 2 always.Isolation layer 5, be formed at the part (following this part is called [external diameter layer 5a]) on the outer diametric plane 2a and be formed at part on the end face 2b (following this part is called [facing layer 5b]), go up the part that forms by diametric plane 2a outside and the 2c of chamfered edge portion between end face 2b and be connected.The part of external diameter layer 5a buries in circumferential groove 2a1, and the part of facing layer 5b buries in circumferential groove 2b1.
The external diameter of external diameter layer 5a is evenly directly, but because the central part 2a2 of outer diametric plane 2a only swells dimension delta to two end part 2a3, so the thickness of external diameter layer 5a and inhomogeneous, outer diametric plane 2a at the thickness t1 of central part 2a2 at thickness t2 the small size δ (t1=t2-δ) of two end part 2a3.External diameter layer 5a is viewpoint from impact resistance etc. at the thickness t1 of central part 2a2, being preferable more than the 0.3mm.The thickness t3 of facing layer 5b, identical with external diameter layer 5a at the thickness t2 of two end part 2b3, perhaps also can be greater than or less than thickness t2.Preferably thickness t3 is greater than thickness t2.
Figure 2 shows that the 2nd example that the present invention is applicable to roller bearing.Wheel 11, foreign steamer 12, the several cylinders roller 13 between interior wheel 11 and foreign steamer 12 in comprising about the Anti electrolytic corrosion bearing of the 2nd example, keep the retainer 14 of cylindrical roller 13, formed isolation layer 15 on foreign steamer 12.
In the 2nd example, the material of the outer diametric plane 12a of foreign steamer 12 and the form of end face 12b, isolation layer 15, form, thickness are all according to above-mentioned the 1st example, so the part of correspondence is used the reference number (reference number front at Fig. 1 add 1) identical with the employed reference number of Fig. 1 and represent, and the repetitive description thereof will be omitted with reference to literal (t1, t2, t3, δ).
[embodiment]
Make the Anti electrolytic corrosion bearing (roller bearing: embodiment) that constitutes as shown in Figure 2, with in formation shown in Figure 2, make the Anti electrolytic corrosion bearing (roller bearing: comparative example), and carry out anxious acceleration test of the thickness t2 that outer diametric plane 12a equals at two end part 2a3 at the thickness of the external diameter layer 15a of central part 12a2 by following condition.
1. test bearing
(embodiment)
Form: 2TS2-7MP2-NU314HSL1BX2P6S20
The material of isolation layer: Mitsubishi's aerochemistry (strain) system MS-6 (PPS+ polyamide+glass fibre 40 weight %)
The thickness of isolation layer: t1=0.5mm, t2=0.8mm, t3=1.5mm
(comparative example)
Form: 2TS2-7MP-NU314HSL1BX2P6S20
The material of isolation layer: Polyplastics (strain) makes FORTLON1140A (PPS+ glass fibre 40 weight %)
The thickness of isolation layer: t1=0.8mm, t2=0.8mm, t3=1.5mm
2. test conditions
Radial load: 1.04KN
Lubricated: grease lubrication
Running figure: 1800rpm * 30 minute → 6520rpm * 8 hour
(from 1800rpm to 6520rpm, rising) to be divided into unit
3. content of the test
Test bearing is carried out anxious accelerated service under these conditions, and each temperature of the interior wheel when measuring running, foreign steamer mother metal, foreign steamer isolation layer.
4. test result
The maximum temperature of the interior wheel during running, foreign steamer mother metal, foreign steamer isolation layer is as follows.
Interior wheel: 123.7 ℃ of embodiments
141.9 ℃ of comparative examples
Foreign steamer mother metal: 71.4 ℃ of embodiments
73.2 ℃ of comparative examples
Foreign steamer isolation layer: 104.1 ℃ of embodiments
127.7 ℃ of comparative examples
The temperature difference of interior wheel and foreign steamer isolation layer: 52.3 ℃ of embodiments
68.7 ℃ of comparative examples
The temperature difference of foreign steamer mother metal and foreign steamer isolation layer: 32.7 ℃ of embodiments
54.5 ℃ of comparative examples
5. Shi Yan evaluation
The interior wheel during urgency accelerated service and the maximum temperature of foreign steamer isolation layer are compared with comparative example, low 20 ℃ approximately of embodiment's situations.In addition, in the outward appearance investigation after test, embodiment, comparative example all do not have to find to have unusually.By this test result as can be known, embodiment compares with comparative example, and the temperature difference of the temperature difference of interior wheel and foreign steamer isolation layer and foreign steamer mother metal and foreign steamer isolation layer is little, and fine heat radiation property.
As described above, as utilize the present invention, can provide a kind of and guarantee isolation layer proper impact and withstand load, and the Anti electrolytic corrosion bearing of fine heat radiation property.
Claims (6)
1. Anti electrolytic corrosion bearing comprises formed isolation layer on the fitting surface of at least one rail wheel of interior wheel, foreign steamer, the rotor between between interior wheel and the foreign steamer, wheel and foreign steamer;
It is characterized in that: aforementioned fitting surface is that its central part swells than two end part,
Having an even surface of the aforementioned dielectric layer that forms at aforementioned fitting surface place, and the aforementioned dielectric layer at the thickness of aforementioned fitting surface central part less than thickness at two end part.
2. Anti electrolytic corrosion bearing as claimed in claim 1 is characterized in that: aforementioned fitting surface has circumferential groove respectively between portion and the two end part in the central.
3. Anti electrolytic corrosion bearing as claimed in claim 2 is characterized in that: the critical bight at the central part of aforementioned fitting surface is provided with chamfered edge, and this chamfered edge is arranged to axis is formed less than the plane of inclination of 45 or the R face with curvature.
4. as any described Anti electrolytic corrosion bearing in the claim 1～3, it is characterized in that: the aforementioned dielectric layer is formed into the end face of aforementioned rail wheel always from aforementioned fitting surface.
5. as any described Anti electrolytic corrosion bearing in the claim 1～3, it is characterized in that: the aforementioned dielectric layer is a resin layer.
6. Anti electrolytic corrosion bearing as claimed in claim 4 is characterized in that: the aforementioned dielectric layer is a resin layer.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-101487 | 2003-04-04 | ||
| JP2003101487A JP4286573B2 (en) | 2003-04-04 | 2003-04-04 | Electric corrosion prevention bearing |
| JP2003101487 | 2003-04-04 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1536238A CN1536238A (en) | 2004-10-13 |
| CN100419291C true CN100419291C (en) | 2008-09-17 |
Family
ID=33465266
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100065394A Expired - Fee Related CN100419291C (en) | 2003-04-04 | 2004-03-04 | Anti electrolytic corrosion bearing |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP4286573B2 (en) |
| CN (1) | CN100419291C (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692590B (en) * | 2009-08-10 | 2011-09-07 | 南阳防爆集团股份有限公司 | Motor insulating bearing device and manufacturing method thereof |
| CN102979813A (en) * | 2012-11-22 | 2013-03-20 | 上海斐赛轴承科技有限公司 | Insulating bearing with insulating ferrule and manufacturing method thereof |
| CN105422618A (en) * | 2015-12-15 | 2016-03-23 | 谷家菊 | Bearing for vehicle transmission shaft |
| WO2017179634A1 (en) * | 2016-04-12 | 2017-10-19 | 日本精工株式会社 | Insulated bearing |
| JP7134639B2 (en) * | 2017-03-24 | 2022-09-12 | アクティエボラゲット・エスコーエッフ | Rolling bearing with electrical insulating layer |
| CN106837996A (en) * | 2017-03-31 | 2017-06-13 | 浙江天马轴承有限公司 | One kind insulation deep groove ball bearing |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0475224U (en) * | 1990-11-09 | 1992-06-30 | ||
| JPH04210124A (en) * | 1990-12-11 | 1992-07-31 | Bando Chem Ind Ltd | Electrically insulated bearing |
| JPH07208462A (en) * | 1994-01-24 | 1995-08-11 | Ntn Corp | Insulated rolling bearing |
| JPH07238939A (en) * | 1994-02-25 | 1995-09-12 | Nippon Seiko Kk | Electric corrosion preventive rolling bearing and its manufacturing device |
| JPH10246238A (en) * | 1997-03-06 | 1998-09-14 | Ntn Corp | Rolling bearing and its attaching structure |
| JPH1130239A (en) * | 1997-05-12 | 1999-02-02 | Nippon Seiko Kk | Electrolytic corrosion preventive rolling bearing |
-
2003
- 2003-04-04 JP JP2003101487A patent/JP4286573B2/en not_active Expired - Fee Related
-
2004
- 2004-03-04 CN CNB2004100065394A patent/CN100419291C/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0475224U (en) * | 1990-11-09 | 1992-06-30 | ||
| JPH04210124A (en) * | 1990-12-11 | 1992-07-31 | Bando Chem Ind Ltd | Electrically insulated bearing |
| JPH07208462A (en) * | 1994-01-24 | 1995-08-11 | Ntn Corp | Insulated rolling bearing |
| JPH07238939A (en) * | 1994-02-25 | 1995-09-12 | Nippon Seiko Kk | Electric corrosion preventive rolling bearing and its manufacturing device |
| JPH10246238A (en) * | 1997-03-06 | 1998-09-14 | Ntn Corp | Rolling bearing and its attaching structure |
| JPH1130239A (en) * | 1997-05-12 | 1999-02-02 | Nippon Seiko Kk | Electrolytic corrosion preventive rolling bearing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2004308735A (en) | 2004-11-04 |
| JP4286573B2 (en) | 2009-07-01 |
| CN1536238A (en) | 2004-10-13 |
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| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
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Granted publication date: 20080917 Termination date: 20180304 |