Patents by Inventor Yohei Arimatsu

Yohei Arimatsu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20200238389
    Abstract: A precision machine tool includes: a tool support for supporting a tool; a tool table serving as a moving mechanism capable of moving the tool support; and one or multiple imaging devices fixed to the tool support, the imaging devices each having an imaging unit configured to capture the image of a machining point on a workpiece machined by the tool.
    Type: Application
    Filed: January 21, 2020
    Publication date: July 30, 2020
    Applicant: FANUC CORPORATION
    Inventor: Yohei Arimatsu
  • Publication number: 20200150094
    Abstract: A machine tool includes: a first calculator configured to calculate a first frequency characteristic based on a first oscillation signal and a measurement signal of a physical quantity measured by a measurement unit when the drive shaft of a servo motor swings in accordance with the first oscillation signal; and a second calculator configured to calculate a second frequency characteristic based on a second oscillation signal and a measurement signal of the physical quantity measured by the measurement unit when the drive shaft of the servo motor swings in accordance with the second oscillation signal.
    Type: Application
    Filed: November 7, 2019
    Publication date: May 14, 2020
    Inventor: Yohei ARIMATSU
  • Publication number: 20200116293
    Abstract: A supporting structure for supporting a device includes: a base portion configured to support the device; and a plurality of leg portions configured to support the base portion. At least one of the plurality of leg portions includes a height adjusting mechanism whose length is adjustable in a height direction of the base portion, and a ground contact member configured to make contact with a ground. The ground contact member is fixed to the base portion with the height adjusting mechanism sandwiched between the ground contact member and the base portion so as to fix the height adjusting mechanism, and the ground contact member has a ground contact surface formed in the shape of a convex-shaped curved surface.
    Type: Application
    Filed: October 7, 2019
    Publication date: April 16, 2020
    Inventor: Yohei ARIMATSU
  • Patent number: 10622854
    Abstract: A rotor includes: a rotary member; a plurality of permanent magnets that are arranged on the outer circumferential side of the rotary member; and a cover tube that is provided on the side of an outer circumferential surface of the plurality of the permanent magnets and that is formed with a fiber bundle in which a plurality of fiber reinforced plastic filaments are arranged along a longitudinal direction, and the fiber bundle of the cover tube is spirally stacked in layers along a circumferential direction of the rotary member such that a part of the fiber bundle in a width direction is slackened.
    Type: Grant
    Filed: August 28, 2018
    Date of Patent: April 14, 2020
    Assignee: FANUC CORPORATION
    Inventors: Shinobu Takano, Takafumi Kajiya, Yohei Arimatsu
  • Patent number: 10355544
    Abstract: Provided is a rotor member that can contribute to an easy assembling operation and components thereof can be reused. The rotor member includes a magnet mounting member having a first end and a second end, a plurality of magnets arranged radially outwardly of the magnet mounting member, and a tubular holding member arranged radially outwardly of the plurality of magnets and holds the magnets between the holding member and the magnet mounting member. The magnet mounting member includes a slit that radially penetrates the magnet mounting member and extends in a predetermined axial-direction section.
    Type: Grant
    Filed: January 30, 2018
    Date of Patent: July 16, 2019
    Assignee: FANUC CORPORATION
    Inventor: Yohei Arimatsu
  • Publication number: 20190081524
    Abstract: A rotor includes: a rotary member; a plurality of permanent magnets that are arranged on the outer circumferential side of the rotary member; and a cover tube that is provided on the side of an outer circumferential surface of the plurality of the permanent magnets and that is formed with a fiber bundle in which a plurality of fiber reinforced plastic filaments are arranged along a longitudinal direction, and the fiber bundle of the cover tube is spirally stacked in layers along a circumferential direction of the rotary member such that a part of the fiber bundle in a width direction is slackened.
    Type: Application
    Filed: August 28, 2018
    Publication date: March 14, 2019
    Applicant: FANUC CORPORATION
    Inventors: Shinobu TAKANO, Takafumi KAJIYA, Yohei ARIMATSU
  • Patent number: 10177619
    Abstract: A rotator member 300 includes a tubular sleeve 301 having a first end surface and a second end surface, a plurality of magnet segments 311 circumferentially disposed at a radially outside of the sleeve 301, and a tubular member 321 adapted to cover the magnet segments 311 from a radially outside to hold the magnet segments 311 between the tubular member 321 and the sleeve 301. The sleeve 301 has an inner circumference surface that includes a tapered surface that gradually and outside the radial direction expands in a direction from the first end surface toward the second end surface.
    Type: Grant
    Filed: November 4, 2016
    Date of Patent: January 8, 2019
    Assignee: FANUC CORPORATION
    Inventor: Yohei Arimatsu
  • Patent number: 10128727
    Abstract: A rotor member includes a cylindrical sleeve part having a circular outer peripheral surface, a plurality of magnets arranged along the outer peripheral surface and including an inner peripheral surface having a curvature radius larger than a curvature radius of the outer peripheral surface, and a cylindrical holding member surrounding the plurality of magnets. Between the outer peripheral surface of the sleeve part and the inner peripheral surface of the magnets, a gap of a radial direction increased toward a circumferential edge portion of the magnets is formed.
    Type: Grant
    Filed: November 9, 2015
    Date of Patent: November 13, 2018
    Assignee: FANUC CORPORATION
    Inventors: Yohei Arimatsu, Kenji Kawai
  • Patent number: 10103589
    Abstract: Provided is a rotor member that can contribute to an easy assembling operation and components thereof can be reused. The rotor member includes a magnet mounting member having a first end and a second end, a plurality of magnets arranged radially outwardly of the magnet mounting member, and a tubular holding member arranged radially outwardly of the plurality of magnets and holds the magnets between the holding member and the magnet mounting member. The magnet mounting member includes a slit that radially penetrates the magnet mounting member and extends in a predetermined axial-direction section.
    Type: Grant
    Filed: June 12, 2015
    Date of Patent: October 16, 2018
    Assignee: FANUC CORPORATION
    Inventor: Yohei Arimatsu
  • Publication number: 20180175684
    Abstract: Provided is a rotor member that can contribute to an easy assembling operation and components thereof can be reused. The rotor member includes a magnet mounting member having a first end and a second end, a plurality of magnets arranged radially outwardly of the magnet mounting member, and a tubular holding member arranged radially outwardly of the plurality of magnets and holds the magnets between the holding member and the magnet mounting member. The magnet mounting member includes a slit that radially penetrates the magnet mounting member and extends in a predetermined axial-direction section.
    Type: Application
    Filed: January 30, 2018
    Publication date: June 21, 2018
    Applicant: FANUC CORPORATION
    Inventor: Yohei Arimatsu
  • Patent number: 9812914
    Abstract: A rotor according to the present invention includes a rotating axis rotating about an axial center of the rotating axis and a rotor component member including an inner circumferential surface on which an outer circumferential surface of the rotating axis fits. The outer circumferential surface of the rotating axis and the inner circumferential surface of the rotor component member include corresponding tapered surfaces each having a diameter that varies in taper along the axial center, the tapered surfaces being in full contact with each other while the outer circumferential surface of the rotating axis is press-fitted relative to the inner circumferential surface of the rotor component member, and at least one of the tapered surfaces has a corrugated surface structure storing a lubricant before the rotating axis is press-fitted relative to the rotor component member, while configured to wear away by press-fitting the rotating axis relative to the rotor component member to discharge the lubricant.
    Type: Grant
    Filed: November 12, 2015
    Date of Patent: November 7, 2017
    Assignee: FANUC CORPORATION
    Inventors: Kenji Kawai, Shinobu Takano, Yohei Arimatsu
  • Patent number: 9680342
    Abstract: A magnet holding member capable of increasing the rotating speed and improving or maintaining reliability of a rotating electrical machine, a rotor having the magnet holding member, a rotating electrical machine having the rotor, and a machine tool having the rotating electrical machine. When one section between one axial end and another axial end of the rotor is referred to as one traverse, the holding member has a cylindrical shape formed by spirally winding a fiber bundle, which is unbroken over at least one traverse, on the outer periphery of the rotor, from one axial end to the other axial end. The holding member is constituted by an FRP having a resin as a matrix, and a terminal treatment by using reactive curable resin is carried out on at least one of a winding start end and a winding terminal end of the fiber bundle.
    Type: Grant
    Filed: October 9, 2015
    Date of Patent: June 13, 2017
    Assignee: FANUC CORPORATION
    Inventor: Yohei Arimatsu
  • Patent number: 9614404
    Abstract: A stator of a rotary electric machine includes a stator core and coils. The stator core is provided with a plurality of slots extending in an axial direction and being spaced apart from one another in a circumferential direction. The coils are wound around through the slots. The coils include coil end portions which protrude outward in the axial direction from an end surface of the stator core. The stator includes a restricting member situated on an inner side of the coil end portions in the radial direction. The restricting member serves to prevent deformation of the coil end portions inward in the radial direction.
    Type: Grant
    Filed: November 25, 2013
    Date of Patent: April 4, 2017
    Assignee: Fanuc Corporation
    Inventors: Shinobu Takano, Yohei Arimatsu
  • Patent number: 9583984
    Abstract: A rotator member 300 includes a tubular sleeve 301 having a first end surface and a second end surface, a plurality of magnet segments 311 circumferentially disposed at a radially outside of the sleeve 301, and a tubular member 321 adapted to cover the magnet segments 311 from a radially outside to hold the magnet segments 311 between the tubular member 321 and the sleeve 301. The sleeve 301 has an inner circumference surface that includes a tapered surface that gradually and outside the radial direction expands in a direction from the first end surface toward the second end surface.
    Type: Grant
    Filed: April 2, 2014
    Date of Patent: February 28, 2017
    Assignee: Fanuc Corporation
    Inventor: Yohei Arimatsu
  • Publication number: 20170054337
    Abstract: A rotator member 300 includes a tubular sleeve 301 having a first end surface and a second end surface, a plurality of magnet segments 311 circumferentially disposed at a radially outside of the sleeve 301, and a tubular member 321 adapted to cover the magnet segments 311 from a radially outside to hold the magnet segments 311 between the tubular member 321 and the sleeve 301. The sleeve 301 has an inner circumference surface that includes a tapered surface that gradually and outside the radial direction expands in a direction from the first end surface toward the second end surface.
    Type: Application
    Filed: November 4, 2016
    Publication date: February 23, 2017
    Applicant: FANUC CORPORATION
    Inventor: Yohei Arimatsu
  • Patent number: 9531226
    Abstract: A rotor of an internal permanent magnet synchronous motor including a rotor core, a plurality of slots formed in the rotor core, and a plurality of permanent magnets housed in the plurality of slots. Each of the slots includes a holding part formed between a first outside diameter surface and a first inside diameter surface to hold each of the permanent magnets, and an opening part formed at both sides of the holding part and formed by a second outside diameter surface, a second inside diameter surface and a connecting surface connecting them. The second outside diameter surface is formed to a curved shape so that a distance to an outer circumferential surface of the rotor core in the diametrical direction gradually becomes smaller from both ends of the second outside diameter surface to an intermediate part in the circumferential direction.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: December 27, 2016
    Assignee: Fanuc Corporation
    Inventors: Yohei Arimatsu, Kenji Kawai
  • Patent number: 9413199
    Abstract: A rotor of an electric motor includes a plurality of magnets arranged in a circumferential direction. The rotor includes a holding member mounted concentrically with the rotor and on a radially outside of the magnets so as to hold the magnets. The holding member includes a plurality of tubular members having different diameters and being arranged concentrically with one another. The respective tubular members have expanded diameters, and therefore, compressive holding force acts on the magnets from the holding member, as a result of elastic restorative force. The tubular members include tubular members having different mechanical properties.
    Type: Grant
    Filed: December 26, 2014
    Date of Patent: August 9, 2016
    Assignee: Fanuc Corporation
    Inventor: Yohei Arimatsu
  • Publication number: 20160141929
    Abstract: A rotor member includes a cylindrical sleeve part having a circular outer peripheral surface, a plurality of magnets arranged along the outer peripheral surface and including an inner peripheral surface having a curvature radius larger than a curvature radius of the outer peripheral surface, and a cylindrical holding member surrounding the plurality of magnets. Between the outer peripheral surface of the sleeve part and the inner peripheral surface of the magnets, a gap of a radial direction increased toward a circumferential edge portion of the magnets is formed.
    Type: Application
    Filed: November 9, 2015
    Publication date: May 19, 2016
    Inventors: Yohei Arimatsu, Kenji Kawai
  • Publication number: 20160141931
    Abstract: A rotor according to the present invention includes a rotating axis rotating about an axial center of the rotating axis and a rotor component member including an inner circumferential surface on which an outer circumferential surface of the rotating axis fits. The outer circumferential surface of the rotating axis and the inner circumferential surface of the rotor component member include corresponding tapered surfaces each having a diameter that varies in taper along the axial center, the tapered surfaces being in full contact with each other while the outer circumferential surface of the rotating axis is press-fitted relative to the inner circumferential surface of the rotor component member, and at least one of the tapered surfaces has a corrugated surface structure storing a lubricant before the rotating axis is press-fitted relative to the rotor component member, while configured to wear away by press-fitting the rotating axis relative to the rotor component member to discharge the lubricant.
    Type: Application
    Filed: November 12, 2015
    Publication date: May 19, 2016
    Inventors: Kenji Kawai, Shinobu Takano, Yohei Arimatsu
  • Publication number: 20160111926
    Abstract: A magnet holding member capable of increasing the rotating speed and improving or maintaining reliability of a rotating electrical machine, a rotor having the magnet holding member, a rotating electrical machine having the rotor, and a machine tool having the rotating electrical machine. When one section between one axial end and another axial end of the rotor is referred to as one traverse, the holding member has a cylindrical shape formed by spirally winding a fiber bundle, which is unbroken over at least one traverse, on the outer periphery of the rotor, from one axial end to the other axial end. The holding member is constituted by an FRP having a resin as a matrix, and a terminal treatment by using reactive curable resin is carried out on at least one of a winding start end and a winding terminal end of the fiber bundle.
    Type: Application
    Filed: October 9, 2015
    Publication date: April 21, 2016
    Inventor: Yohei Arimatsu