WO2024009346A1 - 電動機の回転子 - Google Patents

電動機の回転子 Download PDF

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Publication number
WO2024009346A1
WO2024009346A1 PCT/JP2022/026579 JP2022026579W WO2024009346A1 WO 2024009346 A1 WO2024009346 A1 WO 2024009346A1 JP 2022026579 W JP2022026579 W JP 2022026579W WO 2024009346 A1 WO2024009346 A1 WO 2024009346A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
adapter
electric motor
recess
main body
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/026579
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
友佑 今泉
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fanuc Corp
Original Assignee
Fanuc Corp
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 Fanuc Corp filed Critical Fanuc Corp
Priority to US18/866,288 priority Critical patent/US20250330054A1/en
Priority to JP2024531756A priority patent/JPWO2024009346A1/ja
Priority to CN202280096750.6A priority patent/CN119318102A/zh
Priority to DE112022007052.8T priority patent/DE112022007052T5/de
Priority to PCT/JP2022/026579 priority patent/WO2024009346A1/ja
Publication of WO2024009346A1 publication Critical patent/WO2024009346A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K1/00—Details of the magnetic circuit
    • H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22—Rotating parts of the magnetic circuit
    • H02K1/28—Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures
    • 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
    • H02K7/003—Couplings; Details of shafts
    • 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
    • H02K7/086—Structural association with bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • 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
    • H02K5/16—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields
    • H02K5/167—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings
    • H02K5/1677—Means for supporting bearings, e.g. insulating supports or means for fitting bearings in the bearing-shields using sliding-contact or spherical cap bearings radially supporting the rotor around a fixed spindle; radially supporting the rotor directly
    • 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
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans

Definitions

  • the present invention relates to a rotor of an electric motor, and particularly to a rotor into which a shaft of a rotating device powered by an electric motor is inserted.
  • Patent Document 1 listed below discloses a configuration in which a protrusion formed on a rotating shaft of a motor is engaged with a groove formed on a central shaft of a cutting blade roller. Therefore, in the invention described in Patent Document 1 below, the cutting blade roller can be rotated by transmitting the rotational force of the rotating shaft of the motor to the cutting blade roller.
  • an engagement structure as shown in FIG. 7 is conventionally known.
  • the shaft 102 of the rotor 101 rotatably disposed inside the stator 100 is non-rotatably inserted into the insertion hole 105 of the shaft portion 104 of the rotating device 103.
  • a tapered shaft 102 may be inserted into the insertion hole 105 and connected in a tapered manner, or a shaft with spline teeth may be used.
  • a shaft 102 having spline teeth is inserted into the insertion hole 105 for spline connection.
  • One aspect of the present disclosure is a rotor for an electric motor that powers a rotating device, including a rotor body that is rotatably arranged inside a stator and has a recess on one end surface in the axial direction, and a rotor body that is inserted into the recess. an adapter that is attached to the rotor body in a state in which the rotating device is rotated, and into which a shaft portion of the rotating device is inserted in a non-rotatable manner; and a fixing portion that removably fixes the adapter to the rotor body. It is a child.
  • a rotor of an electric motor that can be easily and inexpensively adapted to rotating devices with different configurations.
  • FIG. 2 is a left side view showing a state in which the rotor of the electric motor according to the first embodiment of the present invention is used, with a part thereof shown in cross section.
  • FIG. 2 is a left side view showing the rotor of the electric motor according to the first embodiment of the present invention in a usage state, with a part of the rotor in an exploded state being shown in cross section.
  • FIG. 1 is a front view showing a rotor of an electric motor according to a first embodiment of the present invention. It is a left side view showing the usage state of the rotor of the electric motor concerning a 2nd embodiment of the present invention, and is made into a part, and is shown in cross section.
  • FIG. 2 is a longitudinal cross-sectional view showing the state in which a rotor of a conventional electric motor is used.
  • an electric motor 2 including a rotor 1 according to a first embodiment will be described.
  • the electric motor 2 provides power to the rotating device 3, and is, for example, a servo motor.
  • the electric motor 2 includes a stator 4, a rotor 1, and a housing (not shown).
  • the axial direction J1 is defined as the front-back direction. At this time, one end side in the axial direction J1 is defined as the front side, and the other end side in the axial direction J1 is defined as the rear side.
  • the stator 4 is held within the housing with the axial direction J1 along the front-rear direction.
  • the stator 4 has a contact portion 5 on one end surface in the axial direction J1, with which the rotating device 3 comes into contact.
  • the contact portion 5 has an annular shape that protrudes forward from the front surface of the stator 4 .
  • a coil (not shown) is wound around the stator 4.
  • a rotor 1 is provided inside the stator 4.
  • the rotor 1 includes a rotor body 6 that is rotatably arranged inside the stator 4, an adapter 7 that is detachably attached to the rotor body 6, and an adapter 7 that is detachably fixed to the rotor body 6.
  • a fixing part 8 is provided.
  • the rotor main body 6 is arranged inside the stator 4 with the axial direction J1 along the front-rear direction.
  • the rotor body 6 receives a force from the rotating magnetic field generated by the voltage applied to the coils of the stator 4. Thereby, the rotor main body 6 can rotate around its axis A.
  • the rotor main body 6 is arranged inside the stator 4 so as to be rotatable around the axis A thereof.
  • the rotor main body 6 has a recess 10 in the front surface 9, which is one end surface in the axial direction J1.
  • the recess 10 has a circular shape or a polygonal shape when viewed from the front, and is open toward the front.
  • the front surface 9 of the rotor body 6 is provided with a plurality of screw holes 11 that open forward.
  • the plurality of screw holes 11 are arranged annularly on a virtual circle centered on the axis A.
  • a female thread is formed on the inner peripheral surface of each screw hole 11.
  • the front surface 9 of the rotor body 6 is provided with a plurality of insertion holes 12 that open forward.
  • the plurality of insertion holes 12 are arranged on a virtual circle centered on the axis A. In this embodiment, two insertion holes 12 are arranged at positions sandwiching the axis A.
  • the adapter 7 is made of iron, for example, and has a cylindrical shape into which the shaft portion 13 of the rotating device 3 is inserted.
  • the adapter 7 has a cylindrical shape that opens in the axial direction J1.
  • the inner peripheral surface of the adapter 7 is provided with a plurality of spline teeth 14 that protrude inward in the radial direction of the adapter 7.
  • the plurality of spline teeth 14 are arranged in a ring shape.
  • the adapter 7 has a plate-shaped flange 15 extending radially outward of the adapter 7 at one end in the axial direction J1.
  • the flange 15 is provided with a plurality of through holes 16 that penetrate in the axial direction J1.
  • the plurality of through holes 16 are arranged annularly on a virtual circle centered on the axis A.
  • the flange 15 is provided with a plurality of insertion holes 17 that penetrate in the axial direction J1.
  • the plurality of insertion holes 17 are arranged on a virtual circle centered on the axis A. In this embodiment, two insertion holes 17 are arranged at positions sandwiching the axis A.
  • the shaft portion 13 of the rotating device 3 is provided with spline teeth 18 that mesh with the spline teeth 14 of the adapter 7.
  • the shaft portion 13 of the rotating device 3 has a rod shape with a circular cross section.
  • a plurality of spline teeth 18 are provided on the outer circumferential surface of the shaft portion 13 and protrude outward in the radial direction of the shaft portion 13 .
  • the plurality of spline teeth 18 are arranged in a ring.
  • the fixing part 8 includes a screw member 19 that is screwed into the rotor body 6 via the adapter 7 and a pin 20 that is inserted into the rotor body 6 via the adapter 7.
  • the screw member 19 is a bolt.
  • the pin 20 has a rod shape with a circular cross section.
  • the adapter 7 in order to attach the adapter 7 to the rotor body 6, the adapter 7 is inserted into the recess 10 so that the flange 15 abuts the front surface 9 of the rotor body 6.
  • the screw member 19 is screwed into the screw hole 11 of the rotor body 6 through the through hole 16 of the flange 15, and the screw member 19 is screwed into the screw hole 11 of the rotor body 6 through the through hole 17 of the flange 15.
  • the pin 20 is inserted into the insertion hole 12 of the rotor body 6.
  • the adapter 7 is inserted into the recess 10 of the rotor body 6 and is attached to the rotor body 6 in a non-rotatable but detachable manner.
  • the adapter 7 and the rotor body 6 are arranged on the same axis.
  • the diameter of the insertion hole 12 into which the pin 20 is inserted is larger than the diameter of the insertion hole 17 through which the pin 20 passes.
  • the electric motor 2 and rotating device 3 having such a configuration are connected when the rotor 1 of the electric motor 2 and the shaft portion 13 of the rotating device 3 are engaged.
  • the shaft part 13 is inserted into the adapter 7 so that the spline teeth 14 of the adapter 7 and the spline teeth 18 of the shaft part 13 mesh with each other, so that the rotor 1 of the electric motor 2 and the shaft of the rotating device 3 are connected.
  • portion 13 is engaged. That is, the rotor 1 of the electric motor 2 and the shaft portion 13 of the rotating device 3 are spline-coupled. Therefore, the shaft portion 13 of the rotating device 3 is inserted into the adapter 7 in a non-rotatable manner and rotates together with the rotor body 6.
  • the rotating device 3 can be powered by the rotation of the rotor 1 of the electric motor 2. Note that in the first embodiment, the rotating device 3 contacts the contact portion 5 of the stator 4, thereby preventing the shaft portion 13 from being inserted into the adapter 7 more than necessary.
  • the shaft portion 13 of the rotating device 3 is engaged with the adapter 7 that is detachably attached to the rotor main body 6.
  • the adapter 7 that is detachably attached to the rotor main body 6.
  • the shaft portion 13 of the rotating device 3 comes into contact with the adapter 7. Therefore, according to the first embodiment, since it is the adapter 7 that wears out due to contact with the shaft portion 13, only the adapter 7 needs to be replaced.
  • the fixing part 8 is a screw member 19 that is screwed into the rotor main body 6 via the adapter 7. Therefore, according to the first embodiment, the adapter 7 can be easily attached to and detached from the rotor main body 6.
  • the adapter 7 is fixed to the rotor body 6 by a plurality of screw members 19. Therefore, according to the first embodiment, it is possible to prevent the adapter 7 from rotating relative to the rotor main body 6 when power is transmitted from the electric motor 2 to the rotating device 3.
  • the fixing part 8 is a pin 20 that is inserted into the rotor body 6 via the adapter 7. Therefore, according to the first embodiment, the adapter 7 can be positioned with respect to the rotor body 6 by inserting the pin 20 into the rotor body 6. That is, the screw hole 11 of the rotor body 6 and the through hole 16 of the adapter 7 can be easily positioned.
  • the adapter 7 is fixed to the rotor body 6 by a plurality of pins 20. Therefore, according to the first embodiment, it is possible to prevent the adapter 7 from rotating relative to the rotor main body 6 when power is transmitted from the electric motor 2 to the rotating device 3.
  • the diameter of the insertion hole 12 is larger than the diameter of the insertion hole 17.
  • FIG. 4 a second embodiment of the rotor of the present invention will be described using FIG. 4. Note that components having the same reference numerals as those in the first embodiment have the same functions, and therefore descriptions thereof may be omitted below.
  • the rotor 1a of the second embodiment differs from the first embodiment in the configurations of the adapter 7 and the rotor main body 6.
  • the adapter 7 has an annular spigot part 21 on the outer peripheral surface.
  • the spigot part 21 has an annular shape that projects from the outer peripheral surface of the adapter 7 to the outside in the radial direction of the adapter 7, and also has an annular shape that projects from the flange 15 to the other end side of the adapter 7 in the axial direction J1.
  • the recessed portion 10 of the rotor main body 6 has an annular fitted portion 22 into which the spigot portion 21 is inserted at one end of the inner peripheral surface in the axial direction J1.
  • the fitted portion 22 has an annular shape that projects from the inner peripheral surface of the recess 10 inward in the radial direction of the recess 10 .
  • the spigot part 21 of the adapter 7 is inserted into the fitted part 22 of the recess 10 when the adapter 7 is attached to the rotor main body 6.
  • the outer peripheral surface of the spigot part 21 of the adapter 7 is in contact with the inner peripheral surface of the mated part 22 of the recess 10 .
  • a cylindrical gap 23 is formed between the outer circumferential surface of the adapter 7 and the inner circumferential surface of the recess 10 when the outer circumferential surface of the pilot part 21 and the inner circumferential surface of the fitted part 22 are in contact with each other.
  • the adapter 7 can be positioned with respect to the rotor main body 6 by inserting the spigot part 21 into the fitted part 22. Therefore, according to the rotor 1a of the second embodiment, compared to the case where the adapter 7 is positioned with respect to the rotor main body 6 by contact between the outer circumferential surface of the adapter 7 and the inner circumferential surface of the recess 10, the positioning The processing area of the part used for this can be reduced. Therefore, the rotor 1a of the second embodiment can reduce processing costs.
  • the fitted portion 22 is provided at the opening of the recess 10 . Therefore, according to the rotor 1a of the second embodiment, it is possible to improve the ease of attaching and detaching the adapter 7 to the rotor main body 6.
  • FIGS. 5 and 6 Note that components having the same reference numerals as those in the first embodiment have the same functions, and therefore descriptions thereof may be omitted below.
  • the rotor 1b of the first modification differs from the first embodiment in the configuration of the adapter 7.
  • the adapter 7 has a flange 15 closer to one end in the axial direction J1 than the center in the axial direction J1. Therefore, in the first modification, one end 7a of the cylindrical portion of the adapter 7 in the axial direction J1 protrudes from the flange 15.
  • the length of the adapter 7 of the first modification in the axial direction J1 is preferably longer than the length of the adapter 7 of the first embodiment in the axial direction J1. In this case, the rotor 1b can more reliably prevent the axis of the shaft portion 13 of the rotating device 3 from shifting. Further, a sufficient contact area can be ensured between the adapter 7 and the shaft portion 13 of the rotating device 3, and surface pressure can be reduced, so that larger rotational force can be transmitted.
  • the rotor 1c of the second modification differs from the first embodiment in the configuration of the adapter 7.
  • the tip of the shaft portion 13 of the rotating device 3 has a tapered shape that becomes smaller in diameter toward the other end in the axial direction J1. Therefore, the inner hole 24 of the adapter 7 has a tapered shape whose diameter decreases toward the other end in the axial direction J1.
  • the tapered tip portion of the shaft portion 13 is inserted into the inner hole 24 of the adapter 7, so that the shaft portion 13 of the rotating device 3 is tapered coupled to the adapter 7.
  • the nut member 27 is screwed to a male threaded portion provided at the tip of the shaft portion 13. Since the shaft portion 13 of the rotating device 3 and the inner hole 24 of the adapter 7 are fixed by the frictional force generated by tightening the nut member 27, the end surface 25 of the adapter 7 is fixed to the end surface 26 of the shaft portion 13. Make it stand out.
  • the adapter 7 is engaged with the shaft portion 13 of the rotating device 3 by the spline connection in the first embodiment or the tapered connection in the second modification, the adapter 7 is not limited to this. It suffices if it cannot rotate about the shaft.
  • a pilot part may be provided in the rotor 1b of the first modification and the rotor 1c of the second modification.
  • the inner peripheral surface of the recess 10 is provided with a fitted part into which the spigot part is inserted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)
PCT/JP2022/026579 2022-07-04 2022-07-04 電動機の回転子 Ceased WO2024009346A1 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
US18/866,288 US20250330054A1 (en) 2022-07-04 2022-07-04 Rotor for electric motor
JP2024531756A JPWO2024009346A1 (https=) 2022-07-04 2022-07-04
CN202280096750.6A CN119318102A (zh) 2022-07-04 2022-07-04 电动机的转子
DE112022007052.8T DE112022007052T5 (de) 2022-07-04 2022-07-04 Rotor für einen Elektromotor
PCT/JP2022/026579 WO2024009346A1 (ja) 2022-07-04 2022-07-04 電動機の回転子

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/026579 WO2024009346A1 (ja) 2022-07-04 2022-07-04 電動機の回転子

Publications (1)

Publication Number Publication Date
WO2024009346A1 true WO2024009346A1 (ja) 2024-01-11

Family

ID=89452909

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2022/026579 Ceased WO2024009346A1 (ja) 2022-07-04 2022-07-04 電動機の回転子

Country Status (5)

Country Link
US (1) US20250330054A1 (https=)
JP (1) JPWO2024009346A1 (https=)
CN (1) CN119318102A (https=)
DE (1) DE112022007052T5 (https=)
WO (1) WO2024009346A1 (https=)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3174891U (ja) * 2012-01-31 2012-04-12 ケーエスエス株式会社 電動リニアアクチュエータ
JP2012219488A (ja) * 2011-04-07 2012-11-12 Kobelco Contstruction Machinery Ltd ハイブリッド建設機械

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0646515Y2 (ja) * 1988-09-30 1994-11-30 日立工機株式会社 遠心分離機
JP2001298904A (ja) * 2000-04-14 2001-10-26 Mitsubishi Materials Corp 掘削装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012219488A (ja) * 2011-04-07 2012-11-12 Kobelco Contstruction Machinery Ltd ハイブリッド建設機械
JP3174891U (ja) * 2012-01-31 2012-04-12 ケーエスエス株式会社 電動リニアアクチュエータ

Also Published As

Publication number Publication date
US20250330054A1 (en) 2025-10-23
CN119318102A (zh) 2025-01-14
DE112022007052T5 (de) 2025-09-18
JPWO2024009346A1 (https=) 2024-01-11

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