WO2004072498A1 - 焼結含油軸受 - Google Patents
焼結含油軸受 Download PDFInfo
- Publication number
- WO2004072498A1 WO2004072498A1 PCT/JP2004/001538 JP2004001538W WO2004072498A1 WO 2004072498 A1 WO2004072498 A1 WO 2004072498A1 JP 2004001538 W JP2004001538 W JP 2004001538W WO 2004072498 A1 WO2004072498 A1 WO 2004072498A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- oil
- sintered
- bearing
- impregnated
- lubricating oil
- Prior art date
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
- F16C33/02—Parts of sliding-contact bearings
- F16C33/04—Brasses; Bushes; Linings
- F16C33/06—Sliding surface mainly made of metal
- F16C33/10—Construction relative to lubrication
- F16C33/1025—Construction relative to lubrication with liquid, e.g. oil, as lubricant
- F16C33/103—Construction relative to lubrication with liquid, e.g. oil, as lubricant retained in or near the bearing
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M169/00—Lubricating compositions characterised by containing as components a mixture of at least two types of ingredient selected from base-materials, thickeners or additives, covered by the preceding groups, each of these compounds being essential
- C10M169/04—Mixtures of base-materials and additives
- C10M169/041—Mixtures of base-materials and additives the additives being macromolecular compounds only
-
- 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
- F16C17/00—Sliding-contact bearings for exclusively rotary movement
- F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
- H02K7/08—Structural association with bearings
- H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/0206—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2205/00—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions
- C10M2205/02—Organic macromolecular hydrocarbon compounds or fractions, whether or not modified by oxidation as ingredients in lubricant compositions containing acyclic monomers
- C10M2205/026—Butene
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2207/00—Organic non-macromolecular hydrocarbon compounds containing hydrogen, carbon and oxygen as ingredients in lubricant compositions
- C10M2207/28—Esters
- C10M2207/281—Esters of (cyclo)aliphatic monocarboxylic acids
- C10M2207/2815—Esters of (cyclo)aliphatic monocarboxylic acids used as base material
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10M—LUBRICATING COMPOSITIONS; USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION
- C10M2209/00—Organic macromolecular compounds containing oxygen as ingredients in lubricant compositions
- C10M2209/02—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- C10M2209/08—Macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds containing monomers having an unsaturated radical bound to a carboxyl radical, e.g. acrylate type
- C10M2209/084—Acrylate; Methacrylate
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10N—INDEXING SCHEME ASSOCIATED WITH SUBCLASS C10M RELATING TO LUBRICATING COMPOSITIONS
- C10N2040/00—Specified use or application for which the lubricating composition is intended
- C10N2040/02—Bearings
Definitions
- the present invention relates to a sintered oil-impregnated bearing in which the friction coefficient of a sliding surface that supports a shaft that slides at high speed is maintained low for a long period of time, and is particularly suitable as a bearing for a spindle motor used in an optical disc device or the like.
- One type of bearing for a spindle motor used in a disk rotating device such as a CD-ROM has a sliding bearing structure in which two bearing surfaces are spaced apart in the axial direction.
- the two bearing surfaces can be either press-fitted into the housing or the sintered oil-impregnated bearing can be inserted into the housing, or a bearing surface can be provided at both ends, and a middle relief with a larger diameter than the shaft can be provided in the middle. It is constructed by pressing a sintered oil-impregnated bearing into the housing.
- the spindle motor rotates at a high speed of several thousand revolutions per minute or more.When such a bearing is used, the unbalance load due to the mounting of the disk is applied, and the shaft swings in the circumferential direction of the bearing surface. Therefore, in the bearing, it is difficult to form an oil film on the bearing surface, and the friction coefficient is gradually increased, so that problems such as rapid progress of wear are easily caused.
- a porous sintered bearing is formed from a bronze-based alloy or a copper-iron alloy that has excellent compatibility with the shaft and abrasion resistance, and is lubricated by impregnating the bearing.
- Various improvements have been made to oils as shown in Patent Documents 1 to 4 below.
- the base oil of the bearing oil contains polyolefin and polyol ester. Have.
- the bearing oil of Patent Document 2 is based on poly-Ichijin refin or its hydrogenated base oil, and is obtained by condensation between fatty acids having one OH group or a fatty acid having one OH group and a fatty acid having no -OH group. It is a composition in which an ester of estolide (alcohol), which is a dimer or higher oxy fatty acid oligomer, and an alcohol is blended.
- Patent Document 3 discloses a lubricating oil having a configuration in which poly- ⁇ -olefin or a hydride thereof is used as a base oil, and a phosphate ester is blended with the base oil.
- Patent Document 4 is a prior application filed by the applicant of the present invention, and is a composition in which poly-one-year-old refin is used as a base oil and an aliphatic monohydric alcohol having 14 to 20 carbon atoms (for example, oleyl alcohol) is blended.
- the lubricating oil is described.
- the sintered oil-impregnated bearing impregnated with the above oil has a low friction coefficient on the bearing surface, enables operation at a low current, and can maintain that state for a long time. I have.
- Patent Document 1 Japanese Patent Application Laid-Open No. 9-1225086 (Page 2 etc.)
- Patent Document 2 Japanese Patent Application Laid-Open No. 10-36870 (Page 2 etc.)
- Patent Document 3 Japanese Patent Application Laid-Open No. H11-2649475 (Page 2 etc.)
- Patent Document 4 Japanese Patent Application Laid-Open No. 2002-310016 (Page 2 etc.) However, with the demand for increasing the rotation speed of the spindle motor and saving power consumption, etc. On the other hand, there is a further demand for improved sliding characteristics such as low friction. Disclosure of the invention
- An object of the present invention is to provide a sintered oil-impregnated bearing having excellent durability.
- a sintered oil-impregnated bearing of the present invention is a sintered oil-impregnated bearing in which pores of a porous sintered bearing are impregnated with a lubricating oil, and the lubricating oil is composed of poly-Q! It is intended to contain a base oil and 2-ethylhexyl hydroxystearate. With this configuration, low friction of the sliding surface of the bearing can be maintained for a long time, and power consumption of a power source such as a spindle motor is reduced.
- the lubricating oil may be 0.1 to 3% by mass of polyisobutylene, 0.1 to 3% by mass of polybutene, and 0.5 to 3% by mass of polybutene. It preferably contains at least one of alkyl methacrylates.
- the lubricating oil can contain a corrosion inhibitor (metal deactivator), an antioxidant and the like, as in the conventional lubricating oil.
- FIG. 1 is a schematic cross-sectional view showing the structure of a spindle motor used for a bearing performance evaluation test. BEST MODE FOR CARRYING OUT THE INVENTION
- a sintered oil-impregnated bearing has a sintered bearing formed of a sintered porous metal and a lubricating oil impregnated into the pores of the sintered bearing.
- Various additives are blended depending on the amount of the additives. Common additives include oily agents, lubricity improvers (viscosity index improvers), corrosion inhibitors, antioxidants, extreme pressure agents, cleaning dispersants, pour point depressants, etc., described below. The additive is particularly effective in the present invention.
- Each component of the sintered bearing and the lubricating oil will be described below.
- the bearing material constituting the sintered bearing is a sintered porous metal material, and the composition thereof is bronze, iron, iron-copper, bronze-iron, brass-iron, or the like. Is applicable.
- a bearing for a spindle motor a bronze-iron composite material or a brass-iron composite material, which is a composite material in which copper alloy is dispersed in an iron-based structure, is particularly preferable.
- the effective porosity of the bearing material may be appropriately determined and changed according to the structure of the bearing, and is usually set to about 5 to 25% (volume percentage).
- Sintered oil-impregnated bearings have a shape that forms one smooth sliding surface that is continuous over the entire inner diameter, or have sliding surfaces at both axial ends of the inner diameter, with the inner diameter supporting between them. Those with a large middle relief-shaped intermediate part, those with oil grooves or dynamic pressure grooves formed on the sliding surface, those with sliding surfaces on both the inner diameter and both end faces in the axial direction, etc. Including.
- Such a sintered bearing can be manufactured by a general powder metallurgy manufacturing method including the steps of compacting raw material metal powder, sintering in a non-oxidizing atmosphere, sizing, and oil impregnation. A bearing in which the amount of pores opened in the sliding surface is reduced by sizing is preferable.
- the dynamic pressure groove When the dynamic pressure groove is provided, its shape can be appropriately selected from various shapes such as a shape parallel to the axial direction and a herringbone pattern, but it is desirable that the groove surface has few pores.
- poly- ⁇ -olefin is used as the base oil.
- Poly- ⁇ -Alpha Refin has the lubricating properties, heat resistance, low-temperature properties, and thermal stability required for lubricating oil for plain bearings, and is superior to various mineral oils.
- kinematic viscosity There are no particular restrictions on the composition or properties of the polya-olefin used, but it is very effective to use kinematic viscosity as an index for selection. If the kinematic viscosity of the poly- ⁇ -olefin used is too low, the oil bearing If the kinematic viscosity is too high, the fluidity of the lubricating oil may decrease and the coefficient of friction in the initial stage of operation of the oil-impregnated bearing may increase.
- poly Ichihi suitable for use - the scope of the kinematic viscosity of Orefin can be 5 to 1 0 0 ⁇ 2 Z s at 4 0 ° C.
- the viscosity index can be used as another index.
- Those having a high viscosity index are preferable because they maintain lubricating properties and high-temperature stability, and can be selected with a viscosity index of 110 or more as a guide.
- the lubricating oil for bearings of the present invention contains 2-ethylhexyl hydroxystearate as an oil agent.
- 2-Ethylhexyl hydroxystearate is a condensation reaction product of hydroxystearic acid and 2-ethylhexyl alcohol, and belongs to octyl hydroxystearate, which is industrially known as an oil agent added to cosmetics.
- octyl hydroxystearate may be liquid at room temperature or semi-bestic due to structural isomerism, in the present invention, 2-ethylhexyl hydroxystearate which is liquid at room temperature is preferably used. Particularly preferred is 2-ethylhexyl 12-hydroxystearate.
- the lubricating oil is adsorbed on the metal surface of the bearing to improve the sliding characteristics. Furthermore, when an oil-impregnated bearing is used as a bearing element that supports the shaft of a motor, the change in friction coefficient during operation is smaller than that of conventional lubricating oil, and the effect that the initial friction coefficient can be maintained for a long time is obtained. can get. This effect increases as the content increases, and becomes extremely significant when the content ratio is about 5% by mass or more based on the entire lubricating oil. Exceeds the lubrication properties of lubricating oils. However, if the content exceeds 20% by mass, there is no effect in increasing the content. Therefore, considering the economical aspect, the content ratio of the lubricating oil to the total amount is preferably 5 to 20% by mass.
- the lubricating oil for bearings of the present invention preferably contains at least one of polyisobutylene, polybutene and polyalkyl methacrylate as an additive for improving lubricity.
- Polyisobutylene and polybutene (— CH 2 C (CH 3 ) 2 —) n , (— CH 2 CH (C 2 H 5 ) —) n , (one CH (CH 3 ) CH (CH 3 ) one) n
- it does not contribute to lowering the coefficient of friction, it has the effect of forming a thick lubricating film on the sliding surface, and suppresses metal contact between the bearing surface and the shaft to improve the wear resistance and durability of the bearing.
- These include those ranging from viscous liquids to rubbery solids depending on the molecular weight. In the present invention, those soluble in base oil are used, and those having a molecular weight of about 800 to 20,000 are preferable.
- a mixture of those having different molecular weights may be used.
- a mixture of two kinds of polyisobutylene having a molecular weight of about 5,000 or more and about 5,000 or more can be suitably used.
- the ratio to the total amount of the lubricating oil is preferably in the range of 0.1 to 3% by mass.
- both polyisobutylene and polybutene are added, or when those having different molecular weights are mixed and used, it is preferable to adjust the total amount within the above range. If the content is less than 0.1% by mass, the effect is not sufficiently exhibited, and if it exceeds 3% by mass, the effect is not accompanied by an increase in the content.
- Polyalkyl methacrylate reduces metal contact of sliding parts by adsorption to metal surface. In addition, it acts as a friction polymer due to molecular changes caused by temperature rise due to sliding, and has the effect of reducing friction under heavy load conditions.
- Alkyl groups of polyalkyl methacrylates are branched even with linear saturated hydrocarbons It may be those having, preferably, for example, polymethyl methacrylate, with carbon number of 1 to 1 8 alkyl groups, such as polyether Chirume evening acrylate, those molecular weight of 1 0 4 ⁇ 1. 5 X 1 0 6 Used. It is preferable that the content of the lubricant is in the range of 0.5 to 3% by mass based on the total amount of the lubricating oil. If the content is less than 0.5% by mass, the effect is not sufficiently exhibited. Since the operation of the shaft facilitates the formation of sludge, the durability may be reduced.
- the lubricating oil for bearings of the present invention does not need to contain any additives other than the above-mentioned additives. However, depending on the material of the sintered bearing and the operating environment of the oil-impregnated sintered bearing, corrosion suppression (metal deactivation) is performed. And additives such as antioxidants.
- anti-corrosion agent examples include benzotriazole and derivatives thereof, which have an action of forming an inert film on the metal surface and an antioxidant action.
- antioxidant examples include phenol compounds such as 4,4′-methylene-bis (2,6-di-tert-butylphenol) and 2,6-di-tert-butyl-4-methylphenol; di (octylphen) Nil) Amine compounds such as amine diphenyl-1-naphthylamine.
- the amount of the anticorrosive and the antioxidant to be added may be set so that the ratio to the total amount of the lubricating oil is about 0.05 to 2% by mass.
- a sintered bearing was manufactured using a ferrous copper-based sintered alloy as the bearing material.
- the simple metal powders of iron, copper, zinc and tin are mixed, and the composition is expressed by mass ratio of Cu: 55%, Z n: 6%, Sn: 2%, Fe and other metal impurities: the remaining metal mixed powder was prepared.
- This metal mixed powder was compacted to obtain a compact having a bearing shape and a density of 6.6 Mg Zm 3 .
- the compact was sintered at a temperature of 780 ° C. in a mixed gas atmosphere of hydrogen and nitrogen to obtain a sintered body made of a porous sintered alloy.
- This sintered body had a metal structure in which a copper alloy phase was dispersed in an iron (ferrite) matrix, and had an effective porosity of 20%.
- the obtained sintered body is sized, and as shown in Fig. 1, there are bearings at both ends in the axial direction, and a middle relief with a medium clearance larger than the bearing is formed between them. Bearing 1 was obtained.
- PAO poly- ⁇ -olefin (having a viscosity grade equivalent to ISO VG18)
- HSEH 2-ethylhexyl 12-hydroxystearate
- PAMA non-dispersed polyalkyl methacrylate (alkyl Carbon number: average 12, molecular weight: about 70,000)
- PIB polyisobutylene (molecular weight: about 10,000)
- OA oleyl alcohol
- the mixing ratio of each component is expressed by mass%.
- the components blended as “others” are 0.1% by mass of 2,6-di-tert-butyl-4-methylphenol as an antioxidant and 1.1% by mass of benzotriazole as an anticorrosive agent. .
- the lubricating oils of Examples 1 to 3 were based on polyalpha-olefin, 0.1% by mass of a phenolic antioxidant, 1.1% by mass of a benzotriazole anticorrosive and 1.1% by mass. It contains 2 to 20% by weight of 2-ethylhexyl hydroxystearate.
- the lubricating oils of Examples 4 and 5 further contain polyisobutylene as a lubricity improver, and the lubricating oil of Example 6 further contains polyisobutylene and polyalkyl methacrylate as lubricity improvers.
- the lubricating oil of Example 7 is Contains a large amount of alkyl methacrylate.
- the lubricating oil of Example 8 has a smaller content of 2-ethylhexyl hydroxystearate than that of Example 1.
- the lubricating oil of Example 9 has a higher content of 2-ethylhexyl hydroxystearate than Example 3.
- the lubricating oil of Comparative Example 1 does not contain 2-ethylhexyl hydroxystearate.
- the lubricating oil of Comparative Example 2 corresponds to the lubricating oil described in JP-A-2002-310156, does not contain 2-ethylhexyl hydroxystearate, and contains 10% by mass of oleyl alcohol instead. contains.
- the sintered oil-impregnated bearing 1 was press-fitted into the cylindrical inner diameter of the cup-shaped housing 2 having an open top.
- the inner bottom part of the housing 2 of this test device forms a thrust receiving part 3 for receiving the spherical surface at the end of the shaft 4 in the thrust direction.
- the outer periphery of the housing 2 is provided with a core around which a coil 7 is wound.
- the diameter of the shaft 4 is 3 mm, and on the upper part of the shaft 4 are fixed a rotatable yoke 6 having a magnet 5 on the inner periphery and a mouth 8. Accordingly, in this test apparatus, when the coil 7 is energized, the rotor yoke 6 rotates around the shaft 4.
- the voltage applied to the coil 7 is adjusted so that the rotation speed of the above-mentioned test equipment is 1000 rpm, the rotor 8 is rotated, and the initial current value flowing through the coil 7 at the beginning of rotation (unit: A) was measured. If the operation is continued while adjusting the voltage so that the rotation speed does not change, the rotation will stabilize within one hour from the first operation of the device, and the current value will be constant at a value slightly lower than the initial current value. The operation was continued while maintaining the operation conditions of. After that, the operation time (unit: h) was measured until the rotation speed of the rotor 8 was reduced by 500 rpm or more (below 950 rpm). Table 2 shows the obtained initial current value and operation time.
- the initial current value increases as the sliding friction of the sliding surface of the sintered oil-impregnated bearing increases, it serves as a guideline for evaluating the sliding characteristics.
- the above operation time depends on the initial sliding characteristics of the bearing. This is equivalent to the time during which the durability can be maintained, and is a measure of durability.
- the operating conditions of the above test equipment are more severe than the actual conditions of use of the sintered oil-impregnated bearings, and can be said to be sufficient for evaluation considering practical use.
- Example 8 the initial current value is low as in Examples 1 to 3, but the operation time is relatively short. From these facts, sliding friction can be reduced by adding 2-ethylhexyl hydroxystearate to lubricating oil. It can be seen that by setting the mixing ratio to about 5% by mass or more, it is possible to make the operation time that can maintain the initial sliding characteristics with low sliding friction longer than that of the conventional lubricating oil.
- the present invention by devising the composition of the lubricating oil impregnated into the pores of the porous bearing, the sintered oil-impregnated bearing having a small sliding friction and a sliding property capable of maintaining a low friction state for a long period of time.
- a sintered oil-impregnated bearing suitable for a spindle motor mounted on a disk rotating device such as a CD-ROM or a DVD-ROM, thereby reducing the power consumption of the disk rotating device. And contribute to improved performance.
- the applications of sintered oil-impregnated bearings will expand.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Power Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Sliding-Contact Bearings (AREA)
- Lubricants (AREA)
- Motor Or Generator Frames (AREA)
- Permanent Magnet Type Synchronous Machine (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005504995A JP4213714B2 (ja) | 2003-02-14 | 2004-02-14 | 焼結含油軸受 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2003-037301 | 2003-02-14 | ||
JP2003037301 | 2003-02-14 |
Publications (1)
Publication Number | Publication Date |
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WO2004072498A1 true WO2004072498A1 (ja) | 2004-08-26 |
Family
ID=32866354
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2004/001538 WO2004072498A1 (ja) | 2003-02-14 | 2004-02-14 | 焼結含油軸受 |
Country Status (3)
Country | Link |
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JP (1) | JP4213714B2 (ja) |
CN (1) | CN100417825C (ja) |
WO (1) | WO2004072498A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100404893C (zh) * | 2004-10-27 | 2008-07-23 | 日立粉末冶金株式会社 | 动压轴承的制造方法 |
US8546987B2 (en) | 2009-09-18 | 2013-10-01 | Johnson Electric S.A. | Brushless DC motor |
CN112048356A (zh) * | 2020-09-18 | 2020-12-08 | 刘佩仓 | 用于粉末冶金轴承的耐高温型润滑油及生产方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5523223B2 (ja) * | 2010-07-01 | 2014-06-18 | 日立粉末冶金株式会社 | 焼結含油軸受 |
JP6358563B2 (ja) * | 2014-11-04 | 2018-07-18 | Nokクリューバー株式会社 | 焼結含油軸受用潤滑油組成物 |
JP2019100360A (ja) * | 2017-11-28 | 2019-06-24 | マブチモーター株式会社 | 油軸受、その製造方法、及び、モータ組立体 |
JP7153476B2 (ja) * | 2018-06-08 | 2022-10-14 | 出光興産株式会社 | 潤滑油組成物、及び含浸軸受 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6436870A (en) * | 1987-07-30 | 1989-02-07 | Nippon Samikon Kk | Arctic structure |
JPH09125086A (ja) * | 1995-10-31 | 1997-05-13 | Idemitsu Kosan Co Ltd | 含油軸受油組成物 |
JPH11269475A (ja) * | 1998-03-23 | 1999-10-05 | Nippon Steel Chem Co Ltd | 焼結含油軸受ユニット |
JP2002310156A (ja) * | 2001-04-17 | 2002-10-23 | Hitachi Powdered Metals Co Ltd | 焼結含油軸受 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3925958B2 (ja) * | 1996-07-18 | 2007-06-06 | 出光興産株式会社 | 軸受油組成物 |
JP3782889B2 (ja) * | 1998-05-28 | 2006-06-07 | Ntn株式会社 | 動圧型焼結含油軸受 |
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2004
- 2004-02-14 WO PCT/JP2004/001538 patent/WO2004072498A1/ja active Application Filing
- 2004-02-14 CN CNB200480003942XA patent/CN100417825C/zh not_active Expired - Lifetime
- 2004-02-14 JP JP2005504995A patent/JP4213714B2/ja not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6436870A (en) * | 1987-07-30 | 1989-02-07 | Nippon Samikon Kk | Arctic structure |
JPH09125086A (ja) * | 1995-10-31 | 1997-05-13 | Idemitsu Kosan Co Ltd | 含油軸受油組成物 |
JPH11269475A (ja) * | 1998-03-23 | 1999-10-05 | Nippon Steel Chem Co Ltd | 焼結含油軸受ユニット |
JP2002310156A (ja) * | 2001-04-17 | 2002-10-23 | Hitachi Powdered Metals Co Ltd | 焼結含油軸受 |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100404893C (zh) * | 2004-10-27 | 2008-07-23 | 日立粉末冶金株式会社 | 动压轴承的制造方法 |
US8546987B2 (en) | 2009-09-18 | 2013-10-01 | Johnson Electric S.A. | Brushless DC motor |
CN112048356A (zh) * | 2020-09-18 | 2020-12-08 | 刘佩仓 | 用于粉末冶金轴承的耐高温型润滑油及生产方法 |
Also Published As
Publication number | Publication date |
---|---|
CN1748092A (zh) | 2006-03-15 |
JP4213714B2 (ja) | 2009-01-21 |
CN100417825C (zh) | 2008-09-10 |
JPWO2004072498A1 (ja) | 2006-06-01 |
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