WO2017163870A1 - Roulement à billes pour une broche ayant un moteur incorporé - Google Patents

Roulement à billes pour une broche ayant un moteur incorporé Download PDF

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Publication number
WO2017163870A1
WO2017163870A1 PCT/JP2017/009148 JP2017009148W WO2017163870A1 WO 2017163870 A1 WO2017163870 A1 WO 2017163870A1 JP 2017009148 W JP2017009148 W JP 2017009148W WO 2017163870 A1 WO2017163870 A1 WO 2017163870A1
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WO
WIPO (PCT)
Prior art keywords
grease
spindle
built
inner diameter
bearing
Prior art date
Application number
PCT/JP2017/009148
Other languages
English (en)
Japanese (ja)
Inventor
峰夫 古山
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 CN201780019209.4A priority Critical patent/CN108884873A/zh
Priority to DE112017001483.2T priority patent/DE112017001483T5/de
Priority to KR1020187026468A priority patent/KR20180122629A/ko
Publication of WO2017163870A1 publication Critical patent/WO2017163870A1/fr

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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
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • 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
    • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
    • F16C19/14—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load
    • F16C19/16—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls
    • F16C19/163—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for both radial and axial load with a single row of balls with angular contact
    • 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
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6614—Retaining the grease in or near the bearing in recesses or cavities provided in retainers, races or rolling elements
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6607—Retaining the grease in or near the bearing
    • F16C33/6618—Retaining the grease in or near the bearing in a reservoir in the sealing means
    • 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
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6603—Special parts or details in view of lubrication with grease as lubricant
    • F16C33/6633—Grease properties or compositions, e.g. rheological properties
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72—Sealings
    • F16C33/76—Sealings of ball or roller bearings
    • F16C33/78—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members
    • F16C33/784—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race
    • F16C33/7843—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc
    • F16C33/7846—Sealings of ball or roller bearings with a diaphragm, disc, or ring, with or without resilient members mounted to a groove in the inner surface of the outer race and extending toward the inner race with a single annular sealing disc with a gap between the annular disc and the inner race
    • 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
    • F16C2322/00—Apparatus used in shaping articles
    • F16C2322/39—General build up of machine tools, e.g. spindles, slides, actuators
    • 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
    • F16C2370/00—Apparatus relating to physics, e.g. instruments
    • F16C2370/12—Hard disk drives or the like
    • 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

Definitions

  • the present invention relates to a ball bearing for a small spindle, particularly a motor built-in spindle.
  • Small spindle is mainly used for light load machining such as aluminum machining.
  • an angular ball bearing is used which is excellent in high speed, reduces the displacement of the spindle against the external load from the spindle tip during machining, and is advantageous for high-precision machining. There are many cases.
  • the motor 2 and the bearing 3 generate heat during continuous operation, so a cooling structure is necessary to prevent a decrease in machining accuracy due to a change in the dimensions of the entire spindle.
  • the cooling structure there is an outer cylinder cooling structure in which the coolant circulates around the outer periphery of the housing 1 of the spindle.
  • the outer cylinder cooling structure needs to increase the spindle outer diameter, and prevents leakage of the coolant.
  • the structure becomes complicated, such as the need for a seal.
  • the cooling in the housing 1 of the spindle with a built-in motor is mainly performed with air that does not require a complicated structure.
  • the air that cools the inside of the spindle housing 1 cools the motor 2 and then the bearing 3 from the rear side, and is discharged from the tip of the spindle housing 1 to the outside of the spindle housing 1.
  • the tip of the spindle housing 1 also serves as a seal against flying objects, and the pressure inside the spindle housing 1 is increased by an air curtain and a labyrinth seal so that cutting fluid, work pieces, etc. are contained in the spindle housing 1. Preventing intrusion.
  • reference numeral 8 denotes a cage
  • 9 denotes an outer ring
  • 10 denotes a rolling element.
  • the labyrinth structure prevents the air that has entered the inside of the bearing 3 from being discharged by the seal plate 5, and the air that has entered the inside of the bearing 3 causes turbulent flow inside the bearing 3 as shown by the arrows in FIG. 4.
  • the cage 8 may be vibrated.
  • the vibration of the cage 8 is transmitted to the spindle housing 1 and adversely affects the quietness.
  • ball bearings for spindles with built-in motors are often used at high speed operation of about dn 500,000 to dn 1 million even under grease lubrication conditions.
  • the ball bearings for spindles with built-in motors are excellent in high-speed driving performance, that is, grease is used that forms an oil film with a very small amount of lubricating oil but has low stirring resistance even during high-speed operation and does not easily rise in temperature. ing.
  • the base oil contained in the grease has a low viscosity. In many cases, grease having a viscosity of 20 to 40 mm 2 / S40 ° C. and a blending degree of about 200 to 300 is used.
  • a base oil viscosity of 20 to 30 mm 2 / S (40 ° C., blending degree of about 200 to 230) is used.
  • the ball bearing 3 for a spindle with a built-in motor in Patent Document 2 has a structure in which air flows inside the bearing, and there are cases where 10 to 30 NL / min flows in the amount of air.
  • the greater the air flow inside the bearing the easier it is to grease the grease that was initially sealed or the base oil viscosity 20-30mm 2 / S40 ° C and the blending degree 200-230. In particular, it is easy to be discharged.
  • the present invention tries to enable a long-term stable lubrication life while maintaining lubrication characteristics during high-speed operation and preventing the grease and base oil from being easily discharged even under conditions where air flows inside the bearing. Is.
  • a seal plate that protrudes toward the inner ring is provided on the inner diameter surface of the seal plate, and the length in the inner diameter direction of the seal plate is substantially straight without any resistance from the inlet side to the outlet side of the air passing through the bearing.
  • the grease enclosed between the outer ring and the inner ring is held by the low-viscosity grease mainly located on the inner diameter side of the outer ring and easily affected by air. It consists of two types of high-viscosity greases located on the inner diameter side from the container side surface.
  • the low-viscosity grease mainly located on the inner diameter side of the outer ring is a grease with a base oil viscosity of 20 to 30 mm 2 / S (40 ° C) and a blending degree of 200 to 230.
  • the high-viscosity grease located on the side is a grease having a base oil viscosity of 30 to 40 mm 2 / S (40 ° C.) and a blending degree of 240 to 260.
  • the ball bearing for a spindle with a built-in motor has a structure in which air flows inside the bearing, high-viscosity grease is sealed from the side surface of the cage that is susceptible to air to the inner diameter side.
  • the high-viscosity grease makes it difficult to discharge low-viscosity greases and base oils, which are mainly located on the inner diameter side of the outer ring and have excellent lubrication characteristics at high speed, and provide a stable lubrication life over a long period of time.
  • FIG. 6 is a partial cross-sectional view of a ball bearing for a spindle with a built-in motor of Patent Document 2. It is the schematic of a spindle with a built-in motor.
  • the ball bearing for spindle with a built-in motor is an angular ball bearing.
  • the angular ball bearing according to the present invention includes an inner ring 11, an outer ring 12, a rolling element 13 disposed on the rolling surfaces of the inner ring 11 and the outer ring 12 facing each other, a cage 14 that holds the rolling element 13, and an inner ring.
  • the seal plate 15 is mounted in a mounting groove 16 provided on the inner diameter surface of the outer ring 12.
  • the outer diameter surface 11 a of the inner ring 11 facing the inner diameter portion of the seal plate 15 is formed in a straight line, and between the inner diameter portion of the seal plate 15 and the outer diameter surface of the inner ring 11, Unlike the conventional bearing shown in FIG. 4, the seal groove forming the labyrinth structure is not formed.
  • the outer diameter surface of the inner ring 11 on the outlet side and the sealing plate so that the air can pass substantially linearly without resistance from the inlet side to the outlet side of the passing air.
  • the length of the seal plate 15 in the inner diameter direction is defined so that the projected area of the gap between the inner diameter portion 15 and the projected area of the air flow path passing through the bearing is substantially equal.
  • the projected area is about 10% smaller than the projected area of the flow path of the air passing through the bearing. Good.
  • the inner diameter direction of the seal plate 15 is such that the gap between the inner diameter portion of the seal plate 15 and the outer diameter surface of the inner ring 11 facing the seal plate 15 has a projected area through which air can pass substantially linearly without resistance.
  • the length By prescribing the length, it is difficult for excessive force to be applied to the seal plate 15 when air passes through the bearing, and the seal plate 15 can be prevented from falling over and deforming, thereby ensuring stable sealing performance. If this condition is satisfied, the gap between the inner diameter portion of the seal plate 15 and the outer diameter surface of the inner ring 11 facing the seal plate 15 may be increased. It is desirable to be small.
  • 2 and 3 are partially enlarged views showing the guide state of the cage 14 of the embodiment of the ball bearing for a spindle with a built-in motor according to the present invention.
  • the alternate long and two short dashes line indicates the pitch circle diameter (PCD) of the rolling element 13
  • reference numeral 14 a indicates a pocket that accommodates the rolling element 13.
  • the dimension d of the inner diameter portion 14b of the retainer 14 is preferably as large as possible so as not to prevent the passage of air. However, if the inner diameter portion 14b of the retainer 14 is increased, the strength of the retainer 14 decreases.
  • the dimension d of the inner diameter part 14b of the cage 14 is the dimension D of the outer diameter part 14c of the cage 14, the load Q received by the rolling element 13, the friction coefficient ⁇ between the rolling element 13 and the race, and the cage 14 are formed.
  • the dimension d of the inner diameter portion 14b of the retainer 14 is preferably larger than the inner diameter dimension of the seal plate 15 so as not to prevent the passage of air.
  • a structure in which the circumferential contact portion 14d of the pocket 14a with the rolling element 13 is on the outer diameter side than the PCD of the rolling element 13 is more preferable.
  • the circumferential contact portion 14d of the pocket 14a of the cage 14 with the rolling element 13 is positioned on the outer diameter side of the PCD of the rolling element 13, thereby causing the rolling element 13 to move in the circumferential direction as indicated by a thick line arrow.
  • a force in the outer diameter direction always acts on the retainer 14, a clearance between the retainer 14 and the outer diameter surface 11a of the inner ring 11 is secured, and passage of air is not hindered.
  • the inner diameter portion 14 b of the cage 14 is more than the PCD of the rolling element 13 so that the outer diameter direction force always acts on the cage 14 with respect to the circumferential movement of the rolling element 13. It may be located on the outer diameter side.
  • the circumferential contact portion 8b of the pocket 8a of the cage 8 with the rolling element 10 is on the PCD of the rolling element 10, but the embodiment of the present invention shown in FIG. Then, the circumferential direction contact part 14d with the rolling element 13 of the pocket 14a of the holder
  • retainer 14 is located in the outer diameter side rather than PCD of a rolling element.
  • a grease pocket 17 is provided in the part.
  • the orientation of the bearing differs between the two rows with respect to the air flow, so that the grease pockets 17 are formed on the left and right sides of the bearing. .
  • the amount of grease filled is 40% to 50% of the static space volume. If it is 40% or less, a stable durability effect cannot be obtained due to the bias of grease due to air pressure. In the case of 50% or more, due to grease bias due to air pressure, excessive rewinding of grease leads to large temperature fluctuations and vibration fluctuations, and stable rotation cannot be obtained.
  • Two types of grease are used: a low-viscosity grease G1 mainly located on the inner diameter side of the outer ring 12, and a high-viscosity grease G2 located on the inner diameter side from the side surface of the cage 14 that is easily affected by air. ing.
  • the grease G2 having a higher base oil viscosity of 30 to 40 mm 2 / S40 ° C. and a blending degree of 240 to 260 than the initially filled grease G1 is used.
  • the cage 14 is sealed so as to be positioned on the inner diameter side from the side surface.
  • the grease with low viscosity is first sealed and used for familiar operation, and then the grease with high viscosity is sealed on both the left and right sides. Excessive grease is discharged from the lip by agitation, but the familiar operation is performed with the pre-filled grease, and then the grease is distributed and sealed in the spaces on both sides, so that the discharge from the seal lip 15 during the familiar operation is performed. Can be suppressed.
  • the total amount of grease filled will be 50% to 70% of the static space volume.
  • the running-in time after assembling the spindle becomes longer, or the grease may be rewound or excessive, resulting in large temperature fluctuations and vibration fluctuations, and stable rotation may not be obtained.
  • the initial grease G1 is about 50% of the total amount of grease.
  • 25% of high-viscosity grease G2 is sealed on both sides of the bearing.
  • Grease thickeners include, for example, urea, Ba complex soap, Li soap, and the like.
  • Base oils include ester-based and synthetic oils.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rolling Contact Bearings (AREA)

Abstract

Le but de la présente invention est de fournir un roulement à billes pour une broche ayant un moteur intégré, le roulement étant conçu de telle sorte que, tout en maintenant des propriétés de lubrification pendant un fonctionnement à grande vitesse, et même dans les conditions où l'air s'écoule à travers l'intérieur du roulement, le roulement n'est pas enclin à rejeter de la graisse ou de l'huile de base et rend possible une durée de vie de lubrification stable à long terme. De la graisse de viscosité élevée (G2) est introduite dans un espace qui est facilement altéré par l'air, à partir d'une surface latérale d'un élément de retenue (14) jusqu'au côté de diamètre intérieur, et en raison de cette graisse de viscosité élevée (G2), une graisse de faible viscosité (G1) ou une huile de base ayant des propriétés de lubrification exceptionnelles à des vitesses élevées, principalement située sur le côté de diamètre intérieur d'une bague extérieure (12), n'est pas sujette à être rejetée, ce qui permet d'obtenir une durée de vie de lubrification stable à long terme.
PCT/JP2017/009148 2016-03-23 2017-03-08 Roulement à billes pour une broche ayant un moteur incorporé WO2017163870A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201780019209.4A CN108884873A (zh) 2016-03-23 2017-03-08 用于内置有电动机的轴的球轴承
DE112017001483.2T DE112017001483T5 (de) 2016-03-23 2017-03-08 Spindelkugellager mit eingebautem motor
KR1020187026468A KR20180122629A (ko) 2016-03-23 2017-03-08 모터 내장 스핀들용 볼베어링

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2016-057825 2016-03-23
JP2016057825A JP2017172650A (ja) 2016-03-23 2016-03-23 モータ内蔵スピンドル用玉軸受

Publications (1)

Publication Number Publication Date
WO2017163870A1 true WO2017163870A1 (fr) 2017-09-28

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PCT/JP2017/009148 WO2017163870A1 (fr) 2016-03-23 2017-03-08 Roulement à billes pour une broche ayant un moteur incorporé

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JP (1) JP2017172650A (fr)
KR (1) KR20180122629A (fr)
CN (1) CN108884873A (fr)
DE (1) DE112017001483T5 (fr)
TW (1) TW201805538A (fr)
WO (1) WO2017163870A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201800004583A1 (it) * 2018-04-17 2019-10-17 Cuscinetto di rotolamento a contatto angolare ad alta precisione
GB2595882A (en) * 2020-06-09 2021-12-15 Edwards Ltd Vacuum bearing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107956793B (zh) * 2017-12-04 2019-05-03 吴银辉 一种推力球轴承及包括推力球轴承的挖掘机
JP7050632B2 (ja) * 2018-09-07 2022-04-08 Ntn株式会社 転がり軸受およびこの転がり軸受を備えたスピンドル装置
JP2020085128A (ja) * 2018-11-26 2020-06-04 Ntn株式会社 転がり軸受

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JP2001263358A (ja) * 2000-03-23 2001-09-26 Minebea Co Ltd 玉軸受及びその潤滑方法
JP2003327990A (ja) * 2002-03-07 2003-11-19 Nsk Ltd グリース組成物、転がり軸受及びスピンドルモータ
JP2004211797A (ja) * 2002-12-27 2004-07-29 Kyodo Yushi Co Ltd 転がり軸受
JP2008121749A (ja) * 2006-11-09 2008-05-29 Ntn Corp インバータ駆動モータ用グリース封入軸受
JP2012154359A (ja) * 2011-01-24 2012-08-16 Nsk Ltd 転がり軸受、及びモータ
JP2014169758A (ja) * 2013-03-04 2014-09-18 Mitsubishi Heavy Ind Ltd 軸受装置
WO2015178495A1 (fr) * 2014-05-22 2015-11-26 日本精工株式会社 Dispositif de roulement
JP2016023719A (ja) * 2014-07-22 2016-02-08 Ntn株式会社 モータ内蔵スピンドル用玉軸受

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TW201805538A (zh) 2018-02-16
JP2017172650A (ja) 2017-09-28

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