WO2020090278A1 - Dispositif de broche muni de moteur intégré - Google Patents

Dispositif de broche muni de moteur intégré Download PDF

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Publication number
WO2020090278A1
WO2020090278A1 PCT/JP2019/036850 JP2019036850W WO2020090278A1 WO 2020090278 A1 WO2020090278 A1 WO 2020090278A1 JP 2019036850 W JP2019036850 W JP 2019036850W WO 2020090278 A1 WO2020090278 A1 WO 2020090278A1
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WO
WIPO (PCT)
Prior art keywords
spindle device
motor
housing
bearing
flinger
Prior art date
Application number
PCT/JP2019/036850
Other languages
English (en)
Japanese (ja)
Inventor
翔一郎 小栗
恭平 松永
Original Assignee
日本精工株式会社
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 日本精工株式会社 filed Critical 日本精工株式会社
Publication of WO2020090278A1 publication Critical patent/WO2020090278A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/207—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium with openings in the casing specially adapted for ambient air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/04—Headstocks; Working-spindles; Features relating thereto
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B47/00—Drives or gearings; Equipment therefor
    • B24B47/10—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces
    • B24B47/12—Drives or gearings; Equipment therefor for rotating or reciprocating working-spindles carrying grinding wheels or workpieces by mechanical gearing or electric power
    • 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
    • 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
    • F16C33/80—Labyrinth sealings
    • 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
    • F16C35/08—Rigid support of bearing units; Housings, e.g. caps, covers for spindles
    • F16C35/12—Rigid support of bearing units; Housings, e.g. caps, covers for spindles with ball or roller bearings

Definitions

  • the present invention relates to a motor built-in type spindle device.
  • a spindle device applied to machine tools, etc. is equipped with a cutting tool at the tip of the rotary shaft and rotates at high speed to perform cutting and grinding of the workpiece.
  • a large amount of machining liquid is supplied to the machining site for the purpose of lubricating and cooling the cutting tool and the machining site. That is, due to the lubricating effect of the working fluid, it is possible to improve the machinability, suppress the wear of the working edge, and extend the tool life.
  • the cooling effect of the machining fluid suppresses the thermal expansion of the cutting tool and the workpiece to improve the machining accuracy and prevent the heat welding of the machining site to improve the machining efficiency and the surface texture of the machined surface. Planned.
  • the distance between the spindle device and the machining area may be short, and problems may occur due to the large amount of machining fluid also on the front surface of the spindle device. That is, a large amount of machining fluid supplied may infiltrate into the bearing that supports the rotary shaft, and if the machining fluid infiltrates into the bearing, it may cause lubrication failure or seizure of the bearing. Therefore, various waterproof mechanisms are applied to the spindle device for the purpose of improving the waterproof property of the spindle device and preventing the machining fluid from entering the inside of the bearing.
  • a spindle device used in a machine tool
  • the spindle device rotates integrally with the rotary shaft at the front end (tool side).
  • a non-contact waterproof mechanism called a flinger is often applied.
  • the flinger narrows the clearance between the flinger and the housing to form a so-called labyrinth seal to improve waterproofness. This is because contact seals such as oil seals and V seals generate a large amount of heat from the seal contact portion during high-speed rotation, and the seal members wear and it is difficult to maintain waterproof performance for a long period of time. Further, air is forcibly discharged from the vicinity of the labyrinth seal to prevent the machining fluid from entering the bearing due to the air seal effect.
  • Patent Document 1 discloses a spindle device having a motor built-in structure including a flinger.
  • FIG. 8 is a sectional view showing an example of a conventional spindle device having a motor built-in structure including a flinger.
  • the spindle device 100 has a motor 101 inside the spindle device 100, and drives the motor 101 to rotate a rotary shaft 102.
  • the flinger 105 is fixed to the front end of the spindle device 100 so as to rotate integrally with the rotary shaft 102, and forms a labyrinth seal portion 108 between the flinger 105 and the front outer ring retainer 107 of the housing 103.
  • the flinger 105 integrally rotates at a high speed together with the rotary shaft 102, so that the working fluid applied to the flinger 105 is spun outward in the radial direction by centrifugal force along with the above-mentioned labyrinth effect, and the inside of the spindle device 100, in particular, Also, it has an effect of suppressing the infiltration of the working fluid into the inside of the front bearing 109. Further, by opening one end 111a of the air seal path 111 perforated in the housing 103 to the labyrinth seal portion 108 and forcibly supplying air from the other end 111b of the air seal path 111 to discharge the air to the labyrinth seal portion 108. , The air seal effect is obtained.
  • the spindle device is required to be downsized due to high-speed rotation.
  • the small spindle device 100 it is difficult to provide the air seal path 111 as shown in FIG. 8 in the housing 103.
  • equipment for forcibly ejecting air of 0.05 MPa or more is also required, and it is difficult to satisfy the energy saving demanded in recent years.
  • the temperature inside the spindle device 100 tends to rise due to the heat generated from the front and rear bearings 109 and 110 and the motor 101.
  • the high-temperature air may shorten the life of the spindle device 100 due to a decrease in the viscosity of the lubricating oil, solidification of the grease, and the like, in addition to destabilizing the processing accuracy due to thermal expansion of the spindle device 100 and heat loss of the motor 101.
  • the output will decrease due to.
  • a method of cooling the outer diameter side of the spindle device 100 with oil or water is generally adopted. However, when the internal air of the spindle device 100 is hot, the outer diameter is reduced. There is a possibility that it may not be possible to sufficiently cool it only by cooling from.
  • the present invention has been made in view of the problems described above, and an object thereof is to improve machining accuracy even in a relatively small spindle in which it is difficult to install an air seal path, and reduce heat loss of a motor.
  • An object is to provide a spindle device of a motor built-in type that can be reduced.
  • the above object of the present invention is achieved by the following configurations.
  • a motor built-in spindle device comprising: A flinger fixed to the front end side of the rotating shaft to form a labyrinth seal with the housing, The motor-built-in spindle device, wherein the housing has an opening hole for allowing air from the outside of the spindle device to flow into a rear space formed behind the rear bearing.
  • the external air having a temperature lower than that of the inside of the spindle device is made to flow from the outside of the spindle device to the rear space behind the rear bearing so as to cause a gap between the flinger and the housing.
  • 1 is a sectional view of a motor built-in type spindle device according to a first embodiment of the present invention. It is sectional drawing of the spindle device of the motor built-in system which concerns on the 1st modification of 1st Embodiment. It is sectional drawing of the spindle device of a motor built-in system which concerns on the 2nd modification of 1st Embodiment. It is sectional drawing of the spindle device of the motor built-in system which concerns on the 3rd modification of 1st Embodiment. It is sectional drawing of the spindle device of a motor built-in system which concerns on 2nd Embodiment of this invention.
  • the side of the rotary shaft on which the tool is attached (tool side) is also referred to as the front side, and the side opposite to the tool side is also referred to as the rear side.
  • FIG. 1 is a cross-sectional view of a motor built-in type spindle device according to a first embodiment of the present invention.
  • a motor-built-in type spindle device 10 for machine tool spindles hereinafter also simply referred to as “spindle device 10”
  • a rotary shaft 11 is arranged on the tool side (left side in FIG. 1). It is rotatably supported by the housing H by two rows of front bearings 50, 50 and two rows of rear bearings 60, 60 arranged on the opposite side of the tool (on the right side in FIG. 1).
  • the housing H is mainly composed of a front housing 12, an outer cylinder 13, a rear housing 14, and a rear lid 15 in this order from the tool side, and is fastened and fixed by bolts (not shown).
  • Each front bearing 50 is an angular ball bearing having an outer ring 51, an inner ring 52, balls 53 as rolling elements arranged with a contact angle, and a cage (not shown), and each rear bearing 60.
  • the front bearings 50, 50 (parallel combination) and the rear bearings 60, 60 (parallel combination) are arranged so as to cooperate with each other to form a back surface combination.
  • the outer rings 51, 51 of the front bearings 50, 50 are internally fitted to the front housing 12, and the outer ring spacer 54 is fixed by the front outer ring retainer 16 screwed and fixed to the female screw 27 formed in the front housing 12. It is positioned and fixed in the axial direction with respect to the front housing 12 via.
  • the female screw 27 projects forward from the front end surface 12a of the portion of the front housing 12 into which the outer races 51, 51 are fitted, and is formed on the inner peripheral surface of the front cylindrical portion 12b facing the flinger 40 described later. ..
  • the inner rings 52, 52 of the front bearings 50, 50 are fitted onto the rotary shaft 11 by the nut 17 fastened to the rotary shaft 11 via a flinger 40 and an inner ring spacer 55 described later. It is positioned and fixed in the axial direction.
  • the outer rings 61, 61 of the rear bearings 60, 60 are fitted in the sleeve 18 which is slidably fitted in the rear housing 14 in the axial direction, and are integrally formed in the sleeve 18 by bolts (not shown).
  • the fixed rear outer ring retainer 19 positions and fixes the sleeve 18 in the axial direction via the outer ring spacer 64.
  • the inner rings 62, 62 of the rear bearings 60, 60 are fitted onto the rotating shaft 11 by another nut 21, which is fastened to the rotating shaft 11, via the inner ring spacers 65, 65. It is positioned and fixed in the axial direction.
  • a coil spring 23 is arranged between the rear housing 14 and the rear outer ring retainer 19, and the spring force of the coil spring 23 pushes the rear outer ring retainer 19 together with the sleeve 18 rearward. As a result, preload is applied to the front bearings 50, 50 and the rear bearings 60, 60.
  • the tool side of the rotary shaft 11 is provided with a tool mounting hole and a female screw (not shown) formed in the axial direction through the center of the shaft.
  • the tool mounting hole and the female screw are used to mount a tool (not shown) such as a cutting tool on the rotary shaft 11.
  • a conventionally known draw bar (not shown) may be slidably inserted into the shaft core of the rotary shaft 11.
  • Each of the drawbars has a collet portion for fixing a tool holder (not shown), and is biased in the direction opposite to the tool side by the force of the disc spring.
  • a rotor 31 that is integrally rotatable with the rotating shaft 11 and a stator 32 that is arranged around the rotor 31 are disposed substantially in the axial center between the front bearings 50 and 50 and the rear bearings 60 and 60 of the rotating shaft 11.
  • a motor 30 including is provided.
  • the stator 32 is fixed to the outer cylinder 13 by fitting the cooling jacket 33 shrink-fitted into the stator 32 into the outer cylinder 13 forming the housing H.
  • An electric wire 35 that is connected to the coil of the stator 32 and supplies electric power to the stator 32 is inserted into the rear housing 14 and the wiring holes 36 a and 36 b provided in the rear lid 15, and is connected to an external power source.
  • the motor 30 supplies electric power to the stator 32 via the electric wire 35 to generate a rotational force in the rotor 31 to rotate the rotating shaft 11.
  • the motor 30 is housed in a motor chamber 34 that is a space surrounded by the front housing 12, the outer cylinder 13, the rear housing 14, and the sleeve 18 around the rotary shaft 11.
  • the rear lid 15 has an opening cover 28 that closes the opening portion 15a formed at the rear end portion, and is formed mainly by the rear housing 14, the rear lid 15, and the sleeve 18 behind the rotary shaft 11.
  • a rear space 45 is provided.
  • An opening hole 71 that connects the rear space 45 and the outside of the spindle device 10 is formed in the opening cover 28.
  • the opening hole 71 is a hole for letting in air from the outside of the spindle device 10.
  • the flinger 40 is externally fitted to the front end side of the rotary shaft 11 on the tool side (left side in the drawing) of the front bearings 50, 50, and is fixed to the rotary shaft 11 together with the inner rings 52, 52 by the nut 17. ing.
  • the flinger 40 includes a boss portion 41 which is fitted onto the rotary shaft 11, a disc portion 42 which extends radially outward from the boss portion 41, and a ring shape which extends rearward from the outer peripheral portion of the disc portion 42. And an extended annular portion 43.
  • the inner side surface of the disk portion 42 in the axial direction is arranged to face the front housing 12 and the front end surface of the front outer ring retainer 16 in the axial direction with a slight axial clearance, for example, a clearance of about 0.5 mm.
  • the inner peripheral surface of 43 is radially opposed to the outer peripheral surface of the front housing 12 with a slight radial gap, for example, a gap of about 0.5 mm.
  • the flinger 40 constitutes a so-called labyrinth seal 44 between the front housing 12 and the front outer ring retainer 16.
  • the air curtain is formed on the outer peripheral portion of the front housing 12 by the flinger 40, and in order to suppress the machining liquid that falls on the spindle device 10 from entering the front bearings 50, 50 when machining the workpiece. Constitutes a waterproof mechanism. Further, even if the machining liquid or dust enters the labyrinth seal 44, it can be discharged from the annular portion 43 to the outside due to the centrifugal effect of the flinger 40, and the machining liquid or dust can be discharged inside the rotary shaft 11. Intrusion can be prevented.
  • thermal energy is generated in the motor 30 due to various losses that occur when the motor is driven. Further, the temperature of the front bearing 50 and the rear bearing 60 also rises due to the high speed rotation of the rotary shaft 11. This thermal energy heats the air in the motor chamber 34 in which the motor 30 is housed, to become high-temperature air inside the housing H. Further, since the spindle device 10 is generally designed so that air, moisture, dust, etc. do not enter from the outside as much as possible, except for the labyrinth seal 44 provided at the front part of the rotary shaft 11, the spindle device 10 is In many cases, a hole or the like that connects the internal space of the device 10 to the outside is not opened. Therefore, the internal space of the spindle device 10 (in particular, the motor chamber 34) has a higher pressure than the outside due to the high temperature air.
  • the vicinity of the flinger 40 is the portion where the peripheral speed becomes the highest during the rotation of the rotary shaft 11, and the air near the flinger 40 is accompanied by the rotation of the flinger 40.
  • the pressure drops as the velocity of the fluid increases. That is, the air that accompanies the rotation of the flinger 40, which has the highest peripheral speed in the spindle device 10, has the highest speed in the air in the vicinity of the spindle device 10, and therefore the pressure thereof is also the lowest.
  • the thermal energy generated in the motor 30 raises the pressure of the air in the motor chamber 34, while the rotation of the flinger 40 lowers the pressure of the air in the vicinity of the flinger 40.
  • the front side bearing 50 is located in the middle of the space connecting the internal space of the spindle device 10 and the labyrinth seal 44, the high temperature air in the motor chamber 34 is rotated by the front side bearing 50 while the rotary shaft 11 is rotating. Pass through the inner gap.
  • the passage of this high-temperature air that is, the high-temperature air passing through the inside of the front bearing 50 raises the internal temperature of the bearing 50, and the operating environment of the bearing 50 becomes severe.
  • thermal deterioration of the lubricant due to temperature rise inside the bearing and lubricant outflow due to viscosity decrease are likely to occur and the lubricating life is shortened. This could lead to premature bearing damage.
  • the opening cover 28 has the opening hole 71 that connects the rear space 45 and the outside of the spindle device 10, so that the pressure of the air near the flinger 40 is low.
  • an air flow path is formed which passes through the opening hole 71, the rear bearings 60, 60, the motor chamber 34, the front bearings 50, 50, and the labyrinth seal 44, Since the external air (air having a temperature lower than that inside the spindle) introduced from the opening hole 71 flows from the rear side to the front side of the spindle device 10, the above-mentioned problem of thermal deterioration can be eliminated.
  • the external air introduced from the opening hole 71 may flow into the motor chamber 34 via the wiring hole 36a of the rear housing 14 through which the electric wire 35 is inserted.
  • the flinger 40 of the present embodiment is formed so that the annular portion 43 covers the outer peripheral surface of the front housing 12, and has a larger diameter than the flinger 105 of the conventional spindle device 100 shown in FIG. .. Therefore, the circumferential speed of the annular portion 43 is high, the pressure in the vicinity of the flinger 40 is also lower than the pressure in the vicinity of the conventional flinger 105, and a large amount of air flows in the spindle device 10 from the rear to the front. Further, as a result, an air sealing effect is obtained by the air curtain formed near the flinger 105.
  • the inside of the spindle device 10 including the front bearing 50 (in particular, the motor chamber 34) is supplied from the outside of the spindle device 10 by injecting the external air having a temperature lower than that of the inside of the spindle device 10 and discharging it from the labyrinth seal 44. Can be cooled.
  • the opening cover 28 may be formed with an opening hole by a female screw 72 such as a taper screw tap for a pipe or a metric screw tap.
  • a filter member 73 such as a silencer is attached to the female screw 72 to prevent foreign matter such as dust and mist from entering the spindle device 10. May be prevented.
  • a resin tube 74 is connected to the female screw 72 so as to take in the air outside the machine tool, so that dust and dirt can be stored in the spindle device 10. Invasion of foreign matter such as mist may be prevented.
  • the rear housing 14 has a communication hole 24 that connects the motor chamber 34 and the rear space 45. Is provided. Therefore, the pressure drop generated in the labyrinth seal 44 due to the rotation of the flinger 40 can supply more external air to the motor chamber 34, and the motor chamber 34 can be efficiently cooled.
  • the coil spring 23 between the rear housing 14 and the rear outer ring retainer 19 is arranged in a phase (not shown). Other configurations and operations are similar to those of the first embodiment of the present invention.
  • a plurality of communication holes 24 may be formed in the circumferential direction.
  • the sleeve 18 and the rear outer ring retainer 19 are provided with the motor chamber 34 and the rear space. Communication holes 25 and 26 that communicate with 45 may be provided. Also in this case, the pressure drop generated in the labyrinth seal 44 due to the rotation of the flinger 40 allows more external air to be supplied to the motor chamber 34, and the motor chamber 34 can be efficiently cooled.
  • a communication hole 24 that communicates the motor chamber 34 and the rear space 45 is provided in the rear housing 14, and the sleeve 18 and the rear outer ring holder are held.
  • Communication holes 25, 26 may be provided in 19 to connect the motor chamber 34 and the rear space 45.
  • a spindle device shown in FIG. 1 as an example and a spindle device having the same configuration as the example except that the opening cover 28 is not provided with the opening hole 71 as a comparative example. was used to perform the test.
  • the present invention is not limited to the above-described embodiments and modified examples, and various modifications and improvements can be made as appropriate.
  • the motor built-in type spindle device of the present invention can be preferably used for a spindle of a grinder.
  • the rotation axis A front bearing and a rear bearing that rotatably support the rotating shaft with respect to the housing, A motor having a rotor arranged to be rotatable integrally with the rotary shaft between the front bearing and the rear bearing, and a stator arranged around the rotor.
  • a motor built-in spindle device comprising: A flinger fixed to the front end side of the rotating shaft to form a labyrinth seal with the housing, The motor-built-in spindle device, wherein the housing has an opening hole for allowing air from the outside of the spindle device to flow into a rear space formed behind the rear bearing.
  • the housing includes a front housing into which an outer ring of the front bearing is fitted, and a front outer ring retainer that is fixed to the front housing and axially positions the outer ring,
  • the motor built-in spindle device according to any one of (1) to (3), which is for a spindle of a grinding machine. According to this structure, it can be suitably used for a spindle of a grinding machine.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Turning (AREA)
  • Constituent Portions Of Griding Lathes, Driving, Sensing And Control (AREA)
  • Sealing Of Bearings (AREA)
  • Rolling Contact Bearings (AREA)
  • Motor Or Generator Frames (AREA)
  • Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)

Abstract

L'invention concerne un dispositif de broche (10) muni d'un moteur intégré, un déflecteur (40) étant fixé à l'extrémité avant d'un arbre rotatif (11) afin de former un joint à labyrinthe (44) avec un logement H. Le logement H possède une ouverture (71) qui permet à l'air provenant de l'extérieur du dispositif de broche (10) de pénétrer dans un espace arrière (45) formé plus à l'arrière qu'un palier arrière (60). Grâce à cette configuration, il est possible d'améliorer la précision d'usinage et de réduire la perte de chaleur dans le moteur même avec une broche relativement petite dans laquelle il est difficile de fournir un trajet d'étanchéité à l'air.
PCT/JP2019/036850 2018-10-31 2019-09-19 Dispositif de broche muni de moteur intégré WO2020090278A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2018205653A JP7070340B2 (ja) 2018-10-31 2018-10-31 モータビルトイン方式のスピンドル装置
JP2018-205653 2018-10-31

Publications (1)

Publication Number Publication Date
WO2020090278A1 true WO2020090278A1 (fr) 2020-05-07

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JP (1) JP7070340B2 (fr)
TW (1) TW202017679A (fr)
WO (1) WO2020090278A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI811871B (zh) * 2021-11-30 2023-08-11 泓鉅精機股份有限公司 主軸防水蓋結構
WO2023155270A1 (fr) * 2022-02-15 2023-08-24 广东美的智能科技有限公司 Boîtier pour machine électrique

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP7376326B2 (ja) * 2019-11-14 2023-11-08 ファナック株式会社 主軸装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013100099A1 (fr) * 2011-12-27 2013-07-04 日本精工株式会社 Dispositif à broche
JP2014046408A (ja) * 2012-08-31 2014-03-17 Nsk Ltd スピンドル装置
JP2016010204A (ja) * 2014-06-23 2016-01-18 ファナック株式会社 エア流量を制御可能なエアパージシステム
JP2017158240A (ja) * 2016-02-29 2017-09-07 ファナック株式会社 内部に冷媒供給路を有するモータ

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013100099A1 (fr) * 2011-12-27 2013-07-04 日本精工株式会社 Dispositif à broche
JP2014046408A (ja) * 2012-08-31 2014-03-17 Nsk Ltd スピンドル装置
JP2016010204A (ja) * 2014-06-23 2016-01-18 ファナック株式会社 エア流量を制御可能なエアパージシステム
JP2017158240A (ja) * 2016-02-29 2017-09-07 ファナック株式会社 内部に冷媒供給路を有するモータ

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWI811871B (zh) * 2021-11-30 2023-08-11 泓鉅精機股份有限公司 主軸防水蓋結構
WO2023155270A1 (fr) * 2022-02-15 2023-08-24 广东美的智能科技有限公司 Boîtier pour machine électrique

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JP2020069605A (ja) 2020-05-07
TW202017679A (zh) 2020-05-16
JP7070340B2 (ja) 2022-05-18

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