WO2023026978A1 - Dispositif de palier - Google Patents

Dispositif de palier Download PDF

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Publication number
WO2023026978A1
WO2023026978A1 PCT/JP2022/031367 JP2022031367W WO2023026978A1 WO 2023026978 A1 WO2023026978 A1 WO 2023026978A1 JP 2022031367 W JP2022031367 W JP 2022031367W WO 2023026978 A1 WO2023026978 A1 WO 2023026978A1
Authority
WO
WIPO (PCT)
Prior art keywords
bearing
bearing ring
rotating shaft
insulating coating
housing
Prior art date
Application number
PCT/JP2022/031367
Other languages
English (en)
Japanese (ja)
Inventor
隼人 川口
Original Assignee
Ntn株式会社
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 Ntn株式会社 filed Critical Ntn株式会社
Priority to CN202280056870.3A priority Critical patent/CN117836527A/zh
Priority to KR1020247008561A priority patent/KR20240050370A/ko
Publication of WO2023026978A1 publication Critical patent/WO2023026978A1/fr

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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
    • F16C19/02—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
    • F16C19/52—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
    • F16C33/62—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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/063—Fixing them on the shaft
    • 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
    • F16C35/00—Rigid support of bearing units; Housings, e.g. caps, covers
    • F16C35/04—Rigid support of bearing units; Housings, e.g. caps, covers in the case of ball or roller bearings
    • F16C35/06—Mounting or dismounting of ball or roller bearings; Fixing them onto shaft or in housing
    • F16C35/067—Fixing them in a housing
    • 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
    • F16C41/00—Other accessories, e.g. devices integrated in the bearing not relating to the bearing function as such
    • F16C41/002—Conductive elements, e.g. to prevent static electricity

Definitions

  • the present invention relates to a bearing device having a rolling bearing between a rotating shaft and a housing included in a motor for driving a vehicle or the like, and more particularly to insulating the bearing ring of the rolling bearing.
  • a drive system including a drive motor and a transmission.
  • a rotating shaft of the drive motor or transmission is supported by a rolling bearing.
  • a drive motor needs to have a high frequency for inverter control in order to achieve high efficiency, but the higher the frequency, the more likely the current will flow through the rolling bearings.
  • the fitting surface of the bearing ring attached to one of the rotating shaft and the housing is conductive, the electric current due to the potential difference described above will flow through the rolling bearing and discharge will occur in the elastic contact area between the raceway surface and the rolling elements. Electrolytic corrosion may occur on the rolling elements.
  • the fitting surface of the bearing ring is formed with an insulating coating (Patent Document 1).
  • the body of the bearing ring of the rolling bearing is a metal ring, and the outer circumference or inner circumference of the metal ring on the side opposite to the raceway surface is provided with a ground surface for the fitting surface of the bearing ring, and Form a dent that is radially recessed from the base surface, cover the peripheral surface of the metal ring on the base surface side with an insulating coating so as to follow the shape of the dent, or cover the surface on the base surface side so as to fill the dent is covered with an insulating film to reduce the capacitance between the bearing ring and the mating rotating shaft or housing, thereby increasing the impedance.
  • one or more groove-like dents are formed on the metal ring, or a large number of dents are formed in a distributed arrangement, and the insulating coating is formed in a shape that follows the dents.
  • a large number of recessed covering portions recessed from the fitting surface of the bearing ring are formed on the entire circumference of the insulating coating, and a gap is formed between the recessed covering portion and the mating fitting surface of the bearing ring.
  • the problem to be solved by the present invention is to provide a bearing device for supporting a rotating shaft included in a vehicle driving motor or a transmission connected to the vehicle driving motor with a rolling bearing to a housing. It is an object of the present invention to reduce the cost of a bearing ring provided in a rolling bearing while avoiding deterioration in the mass productivity of the bearing ring and the reliability of an insulating coating.
  • the present invention provides a rotating shaft included in a vehicle driving motor or a transmission connected to the vehicle driving motor, a housing provided around the rotating shaft, and a and a rolling bearing for supporting the rotating shaft, the rolling bearing comprising an inner bearing ring, an outer bearing ring, and interposed between the inner bearing ring and the outer bearing ring. and a retainer for holding the plurality of rolling elements, wherein one of the inner bearing ring and the outer bearing ring is connected to the rotating shaft and the housing. and a fitting surface of said one bearing ring that fits into said one member is made of an insulating coating, wherein said fitting surface and said one member , a clearance-fit configuration was adopted.
  • the insulating coating forming the fitting surface of one of the bearing rings and the one member, which is the mating member, are loosely fitted.
  • a high impedance can be realized. Therefore, it is possible to reduce the film thickness of the insulating coating while eliminating the need to form a recessed covering portion in the insulating coating, thereby avoiding deterioration in the mass productivity of one bearing ring and the reliability of the insulating coating. The cost of the bearing ring can be suppressed.
  • the vehicle drive motor in the present invention refers to an electrical device that converts electrical energy and outputs rotation that serves as a vehicle drive source, and an electrical device that converts input rotation into electrical energy during regenerative braking of the vehicle. It means what corresponds to at least one.
  • the transmission in the present invention means a device that converts the input rotational speed and transmits it to the output side, and a continuously variable transmission that can continuously change the speed conversion ratio (reduction ratio, gear ratio),
  • the concept includes a fixed-ratio transmission in which the speed conversion ratio is fixed, and the fixed-ratio transmission includes what is called a speed reducer or a speed increaser that has only one type of speed conversion ratio. included.
  • a fitting clearance of 0.005 mm or more is preferably set between the fitting surface and the one member.
  • the fitting surface of one bearing ring and the one member are The contact area can be reduced to about half or less compared to the case where there is no fitting clearance between them, and high impedance can be realized. Accordingly, it is possible to reduce the cost by thinning the insulating coating.
  • the fitting clearance is 0.02 mm or more.
  • the aforementioned contact area can be reduced by about 70%, and the insulating coating can be made even thinner.
  • the film thickness of the insulating coating is preferably 0.05 mm or less.
  • the film thickness of the insulating coating is reduced to 0.05 mm or less in this way, the deformation of the insulating coating due to the radial load acting on the contact portion between the fitting surface of one bearing ring and the one member is reduced, thereby reducing the contact area described above. expansion can be suppressed and high impedance can be ensured.
  • the insulating film is preferably a fired film containing at least one of ceramics, polyphenylene sulfide resin, polyamideimide resin, and epoxy resin. These materials are suitable as insulating coating materials in terms of insulation resistance, dielectric breakdown voltage, mechanical strength, workability, and the like.
  • the present invention provides a bearing device for supporting a rotating shaft included in a vehicle driving motor or a transmission connected to a vehicle driving motor with a rolling bearing to a housing, by adopting the above configuration. It is possible to reduce the cost of the bearing ring while avoiding deterioration in the mass productivity of the bearing ring provided in the rolling bearing and the reliability of the insulating coating.
  • FIG. 1 is a longitudinal front view showing a main part of a bearing device according to an embodiment of the invention.
  • Side view of the bearing device of FIG. Schematic diagram showing an example of use of the bearing device shown in FIG. Enlarged view of the contact portion between the bearing ring and the housing shown in FIG.
  • the bearing device shown in FIGS. 1 to 3 includes a housing 10, a rotating shaft 21 of a vehicle driving motor 20, and a rolling bearing 1 supporting the rotating shaft 21 with respect to the housing 10.
  • the rotation transmission device illustrated in FIG. 3 includes a vehicle drive motor 20 and a transmission 30 connected to the vehicle drive motor 20 .
  • the transmission 30 comprises a plurality of rotating shafts 31-33, gears 34-36 provided on the respective rotating shafts 31-33, and a plurality of rolling bearings 37, 38 supporting the rotating shafts 31, 32, 33.
  • a rotating shaft 21, which is the motor shaft of the vehicle driving motor 20, is connected to a rotating shaft 31, and both shafts 21, 31 rotate together.
  • the rotation input to the rotation shaft 31 of the transmission 30 is input from the rotation shaft 21 serving as the output shaft of the vehicle driving motor 20 , and the transmission 30 rotates the rotation input to the rotation shaft 31 . is reduced and output from the rotary shaft 33.
  • the transmission 30 accelerates the rotation input to the rotating shaft 33 from the traveling wheel side and outputs it from the rotating shaft 31 to the rotating shaft 21 of the vehicle driving motor 20. It becomes a gearbox.
  • the rolling bearing 1 that supports the rotating shaft 21 and the rolling bearing 37 that supports the rotating shafts 31 to 32 are deep groove ball bearings.
  • a rolling bearing 38 that supports the rotating shaft 33 is a tapered roller bearing.
  • the rolling bearing 1 is interposed between the inner bearing ring 2, the outer bearing ring 3, and the inner bearing ring 2 and the outer bearing ring 3. It has a plurality of rolling elements 4 and a retainer 5 that holds the plurality of rolling elements 4 .
  • the direction along the bearing center axis (not shown, hereinafter the same) of the rolling bearing 1 will be referred to as the "axial direction”.
  • a direction orthogonal to the axial direction is called a “radial direction”.
  • the direction along the circumference around the center axis of the bearing is referred to as the "circumferential direction”.
  • the bearing center axis is the center axis of the inner bearing ring 2 which is the rotating ring.
  • FIG. 1 shows a cross section of an imaginary plane containing the bearing central axis.
  • the axial direction corresponds to the horizontal direction in FIG. 1
  • the radial direction corresponds to the vertical direction in FIG.
  • the inner bearing ring 2 is an annular member having a raceway surface 2a on the outer peripheral side that contacts the rolling elements 4 and a fitting surface 2b that is fitted to the rotating shaft 21 on the inner peripheral side.
  • the outer bearing ring 3 is an annular member having a raceway surface 3a on the inner peripheral side that contacts the rolling elements 4 and a fitting surface 3b on the outer peripheral side.
  • the rolling elements 4 are made of steel balls.
  • the retainer 5 is an annular bearing component that keeps the plurality of rolling elements 4 interposed between the inner and outer raceway surfaces 2a and 3a at a predetermined circumferential interval.
  • the housing 10 has a fitting surface 10a provided around the rotating shaft 21.
  • This fitting surface 10a is formed in the shape of a cylindrical surface.
  • the housing 10 is made of, for example, an aluminum-based material.
  • the entire inner bearing ring 2 is made of steel.
  • the outer bearing ring 3 consists of a metal ring 6 having a raceway surface 3a on the inner peripheral side and an insulating coating 7 covering the outer circumference and both side surfaces of the metal ring 6.
  • the metal ring 6 is made of steel.
  • the insulating coating 7 is made of a coating layer made of a non-metallic material having insulating properties.
  • the insulating coating 7 entirely follows the cylindrical outer diameter surface of the metal ring 6 .
  • the film thickness of the insulating coating 7 is uniform over the entire surface. In FIG. 1, the thickness of the insulating coating 7 is greatly exaggerated in order to make it easier to understand.
  • Insulation coating 7 is made of at least one of ceramics, polyphenylene sulfide resin (PPS), polyamideimide resin (PAI), and epoxy resin from the viewpoint of insulation resistance, dielectric breakdown voltage, mechanical strength, workability, etc. is preferably a fired film containing
  • PPS polyphenylene sulfide resin
  • PAI polyamideimide resin
  • epoxy resin from the viewpoint of insulation resistance, dielectric breakdown voltage, mechanical strength, workability, etc.
  • a fired film containing
  • a baked film can be formed by heating the coated material.
  • epoxy resins and polyamide-imide resins it is also possible to bake them while including a curing agent.
  • the insulating coating 7 can be formed by forming a ceramic coating on the outer circumference of the metal ring 6 and impregnating the ceramic coating with an insulating synthetic resin such as PPS or PAI.
  • the insulating coating 7 may be, for example, a synthetic resin composition containing at least one of PPS, PAI, and epoxy resin as a matrix resin and containing fibrous material that contributes to strengthening the matrix resin.
  • the film thickness of the insulating coating 7 can be, for example, 0.0010 mm or more and 1.0 mm or less. If the film thickness is unnecessarily thick, the cost will increase, so it is preferable to set the film thickness to 1.0 mm or less.
  • the film thickness of the insulating film 7 should be 0.005 mm or more, .100 mm or less is preferred. In this case, considering wear due to creep of the outer bearing ring 3 and insulating properties, it is more preferable that the film thickness of the insulating coating 7 is 0.010 mm or more and 0.050 mm or less.
  • a fitting surface 3b of the outer bearing ring 3 is made of an insulating coating 7. This fitting surface 3b is formed in the shape of a cylindrical surface that defines the outer diameter of the bearing ring 3 on the outer side.
  • the fitting surface 3b of the outer bearing ring 3 is fitted with the fitting surface 10a of the housing 10.
  • a fitting surface 2 b of the inner bearing ring 2 is fitted with a rotating shaft 21 .
  • the maximum outer diameter of the fitting surface 3b of the outer bearing ring 3 is smaller than the minimum inner diameter of the fitting surface 10a of the housing 10. That is, the fitting surface 3b of the outer bearing ring 3 is loosely fitted with the housing 10 as one member of the rotating shaft 21 and the housing 10. As shown in FIG.
  • the fitting clearance set between the fitting surface 3b of the outer bearing ring 3 and the fitting surface 10a of the housing 10 corresponds to the difference between the minimum inner diameter of the fitting surface 10a and the maximum value of the fitting surface 3b.
  • the portions where the housing 10 as one member and the outer bearing ring 3 as one bearing ring, which is a mating member, can come into contact in the radial direction are only the mutual fitting surfaces 3b and 10a. .
  • the insulating coating 7 forming the fitting surface 3b cuts off a circuit through which a leakage current from the drive motor 20 flows, prevents electric discharge between the inner and outer bearing rings 2, 3 and the rolling elements 4, thereby preventing discharge between the inner and outer raceways. To prevent electrolytic corrosion of rings 2, 3 and rolling elements 4.
  • a gap g is formed between the fitting surfaces 3b and 10a over most of the region in the circumferential direction. While a occurs, both fitting surfaces 3b and 10a are in contact at the rest of the circumferential direction. A contact portion between the fitting surfaces 3b and 10a is deformed by a radial load applied to the rolling bearing 1. As shown in FIG. Therefore, the contact portion between the fitting surfaces 3b and 10a has a width Wa in a direction along a plane orthogonal to the radial load direction (downward direction in FIG. 4).
  • the thickness of the insulating coating 7 is preferably 0.05 mm or less.
  • the capacitance C due to the insulating coating 7 can be expressed by the following [Equation 1].
  • ⁇ 0 is the dielectric constant of a vacuum
  • ⁇ m is the dielectric constant of the insulating coating material
  • S is the contact area between the fitting surfaces 3b and 10a
  • d is the thickness of the insulating coating 7.
  • the width Wb of the contact portion between the fitting surfaces 3b and 10b becomes larger than the width Wa in the example shown in FIG. It becomes larger than the example, which is disadvantageous for high impedance. 4 and 5, the widths Wa and Wb are exaggerated in order to make it easier to understand the change in the contact area due to the difference in the fit clearance.
  • the contact area can be reduced by more than half compared to when there is no fit clearance.
  • the contact area can be reduced by about 70%.
  • the contact area between both fitting surfaces 3b and 10a is reduced by 50% or more, more preferably by 70% or more to achieve high impedance between both fitting surfaces 3b and 10a. It can be seen that it is possible to realize Therefore, even if the same capacitance is obtained, the film thickness of the insulating coating 7 is reduced by 50% or more when the fitting clearance is 0.005 mm or more. can be reduced by 70% or more, and the cost of the insulating coating 7 can be reduced.
  • the bearing device shown in FIGS. 1 to 4 is as described above, and includes a rotating shaft 21 included in a vehicle driving motor 20, a housing 10 provided around the rotating shaft 21, and a A rolling bearing 1 for supporting a rotating shaft 21 is provided, and the rolling bearing 1 comprises an inner bearing ring, an outer bearing ring, and a plurality of roller bearings interposed between the inner bearing ring and the outer bearing ring. and a retainer for holding the plurality of rolling elements, and one bearing ring 3 of the inner bearing ring and the outer bearing ring is connected to one of the rotating shaft and the housing.
  • the fitting surface 3b that fits into one member 10 is made of an insulating coating 7, and the fitting surface 3b of one bearing ring 3 and one member 10 are loosely fitted, so that the contact area between the insulating coating and one member is reduced based on the fitting clearance, the capacitance is reduced, and high impedance is realized. be able to.
  • the outer circumference of the metal ring 6 is not recessed to increase the impedance, and the film thickness of the insulating coating 7 is reduced, so that one bearing ring 3 can be mass-produced and the insulating coating 7 can be reduced.
  • the cost of one bearing ring 3 can be suppressed while avoiding deterioration in reliability.
  • a fitting clearance of 0.005 mm or more is set between the fitting surface 3b of one bearing ring 3 and the one member 10, so that the rotating shaft 21 of the vehicle driving motor 20 can be moved.
  • the contact area is reduced to about half or less, and the Impedance can be achieved, and the insulating coating 7 can be made thinner to that extent, thereby reducing the cost.
  • the fitting clearance between the fitting surface 3b of one bearing ring 3 and the one member 10 is 0.02 mm or more, so that the aforementioned contact area is reduced by about 70% and insulation is achieved.
  • Coating 7 can be made thinner.
  • the film thickness of the insulating coating 7 is 0.05 mm or less, the insulating coating 7 is not affected by the radial load acting on the contact portion between the fitting surface 3b of the bearing ring 3 and the member 10 on the one hand. By reducing the deformation of the contact area, the expansion of the contact area can be suppressed, and high impedance can be ensured.
  • the insulation coating 7 is a fired film containing at least one of ceramics, polyphenylene sulfide resin, polyamideimide resin, and epoxy resin, so that the insulation coating 7 has good insulation resistance and insulation. Breakdown voltage, mechanical strength, workability, etc. can be obtained.
  • the impedance is increased between the housing 10 and the outer bearing ring 3 of the rolling bearing 1 that supports the rotating shaft 21 of the vehicle driving motor 20, but the impedance between the inner bearing ring and the rotating shaft is high. It is also conceivable to attempt impedance conversion.
  • the fitting surface of the inner bearing ring as one of the bearing rings is configured with an insulating coating, the fitting surface of the inner bearing ring and the rotating shaft as one member are loosely fitted, and the film thickness is Since it is only necessary to set the loose fitting clearance in the same manner, the illustration and explanation thereof will be omitted.
  • the present invention is applied to the bearing device that supports the rotating shaft 21 of the motor for driving the vehicle 20. Even when the fitting surface of the bearing ring is formed of an insulating coating, the same application as in the case of the rolling bearing 1 may be applied, so illustration and explanation thereof will be omitted.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)
  • Mounting Of Bearings Or Others (AREA)

Abstract

Ce dispositif de palier utilise des paliers à roulement pour supporter un moteur d'entraînement de véhicule, ou un arbre de rotation inclus dans la transmission reliée au moteur d'entraînement de véhicule, par rapport à un boîtier. Le dispositif de palier supprime les coûts de bague de palier tout en évitant la réduction de la fiabilité de film d'isolation ou la productibilité de masse des bagues de palier des paliers à roulement. À cet effet, le palier à roulement (1) présente une bague de roulement (3) qui est fixée à un arbre de rotation (21) ou un boîtier (10), une surface de montage (3b) d'une bague de palier (3) qui s'ajuste avec le premier élément (10) est formée à partir d'un film d'isolation (7), et la surface de montage (3b) et le boîtier (10) ont un ajustement avec jeu.
PCT/JP2022/031367 2021-08-24 2022-08-19 Dispositif de palier WO2023026978A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN202280056870.3A CN117836527A (zh) 2021-08-24 2022-08-19 轴承装置
KR1020247008561A KR20240050370A (ko) 2021-08-24 2022-08-19 베어링 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2021-136377 2021-08-24
JP2021136377A JP2023030949A (ja) 2021-08-24 2021-08-24 軸受装置

Publications (1)

Publication Number Publication Date
WO2023026978A1 true WO2023026978A1 (fr) 2023-03-02

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PCT/JP2022/031367 WO2023026978A1 (fr) 2021-08-24 2022-08-19 Dispositif de palier

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JP (1) JP2023030949A (fr)
KR (1) KR20240050370A (fr)
CN (1) CN117836527A (fr)
WO (1) WO2023026978A1 (fr)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007292119A (ja) * 2006-04-21 2007-11-08 Ntn Corp 軸受、転動部材および転動部材の製造方法
JP2007292114A (ja) * 2006-04-21 2007-11-08 Nsk Ltd 電食防止用絶縁転がり軸受
JP2009191895A (ja) * 2008-02-13 2009-08-27 Sii Micro Precision Kk 転がり軸受ユニットおよびその製造方法
JP2012202487A (ja) * 2011-03-25 2012-10-22 Jtekt Corp 転がり軸受装置
JP2012219850A (ja) * 2011-04-05 2012-11-12 Ntn Corp 車両用モータ駆動装置および自動車
JP2014234901A (ja) * 2013-06-04 2014-12-15 日本精工株式会社 転がり軸受
JP2015209562A (ja) * 2014-04-25 2015-11-24 Ntn株式会社 溶射被膜、及びその形成方法と形成装置、並びに軸受部材

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007298060A (ja) 2006-04-27 2007-11-15 Nsk Ltd 転がり軸受

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007292119A (ja) * 2006-04-21 2007-11-08 Ntn Corp 軸受、転動部材および転動部材の製造方法
JP2007292114A (ja) * 2006-04-21 2007-11-08 Nsk Ltd 電食防止用絶縁転がり軸受
JP2009191895A (ja) * 2008-02-13 2009-08-27 Sii Micro Precision Kk 転がり軸受ユニットおよびその製造方法
JP2012202487A (ja) * 2011-03-25 2012-10-22 Jtekt Corp 転がり軸受装置
JP2012219850A (ja) * 2011-04-05 2012-11-12 Ntn Corp 車両用モータ駆動装置および自動車
JP2014234901A (ja) * 2013-06-04 2014-12-15 日本精工株式会社 転がり軸受
JP2015209562A (ja) * 2014-04-25 2015-11-24 Ntn株式会社 溶射被膜、及びその形成方法と形成装置、並びに軸受部材

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JP2023030949A (ja) 2023-03-08
CN117836527A (zh) 2024-04-05
KR20240050370A (ko) 2024-04-18

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