Patents by Inventor Katsuhiko Shoda

Katsuhiko Shoda 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).

  • Patent number: 11364974
    Abstract: A hydrofoil craft includes a hull including a bottom that spreads from a bow to a stern; and a hydrofoil mechanism provided on the bow side of the hull. The hull further includes an accommodating recess formed therein, and the accommodating recess is recessed toward the stern side between the bow and the bottom to accommodate the hydrofoil mechanism. A retreat surface is formed between the bottom and a recess main surface facing the bow side in the accommodating recess, and the retreat surface extends toward the stern side in a downward direction and is connected to the bottom.
    Type: Grant
    Filed: November 17, 2020
    Date of Patent: June 21, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Shoda, Masaya Kubota, Takashi Okafuji, Masashi Sasaki
  • Patent number: 11273478
    Abstract: A power transmission device includes a first power transmission path for transmitting a driving force of a motor to one driven shaft, and a second power transmission path for transmitting the driving force of the motor to another driven shaft. At least one of the first power transmission path or the second power transmission path includes a first intermediate rotor fixed to an output shaft of the motor, a second intermediate rotor rotated by the first intermediate rotor and moving arcuately along an outer circumference of the first intermediate rotor, a driving shaft rotated by the second intermediate rotor and transmitting the driving force to the one driven shaft or the another driven shaft. The driving shaft is configured to move in a direction perpendicular to an axial center direction of the driving shaft in accordance with movement of the second intermediate rotor around the first intermediate rotor.
    Type: Grant
    Filed: June 7, 2019
    Date of Patent: March 15, 2022
    Assignee: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Akihiko Umeda, Katsuhiko Shoda, Kensuke Nishiura, Kazuma Otaka
  • Publication number: 20210374303
    Abstract: A tooth surface shape design support device for supporting design of a tooth surface shape of a gear includes a principal component shape data acquisition unit configured to acquire a plurality of principal component shape data obtained by performing principal component analysis on a tooth surface shape sample data group including a plurality of tooth surface shape sample data indicating samples of the tooth surface shape, and a tooth surface shape evaluation unit configured to evaluate a tooth surface shape defined by using the plurality of principal component shape data acquired by the principal component shape data acquisition unit.
    Type: Application
    Filed: March 31, 2021
    Publication date: December 2, 2021
    Inventors: Kensuke NISHIURA, Katsuhiko SHODA, Kazuma OTAKA
  • Publication number: 20210179230
    Abstract: A hydrofoil craft includes: a hull including a bottom that spreads from a bow to a stern; and a hydrofoil mechanism provided on the bow side of the hull. The hull includes an accommodating recess formed therein, the accommodating recess being recessed toward the stern side between the bow and the bottom to accommodate the hydrofoil mechanism. A retreat surface is formed between the bottom and a recess main surface facing the bow side in the accommodating recess, the retreat surface extending toward the stern side in a downward direction and being connected to the bottom.
    Type: Application
    Filed: November 17, 2020
    Publication date: June 17, 2021
    Inventors: Katsuhiko SHODA, Masaya KUBOTA, Takashi OKAFUJI, Masashi SASAKI
  • Publication number: 20210162856
    Abstract: A drive device for an electric vehicle includes: an in-wheel motor; and a reduction gear that reduces rotational speed of the in-wheel motor and transmits resultant rotation to a drive wheel of the electric vehicle; the reduction gear including a sun gear driven by the in-wheel motor, a first planetary gear that is arranged to be meshed with the sun gear and has a first number of teeth, a fixed ring gear that is meshed with the first planetary gear and arranged non-rotatably, a second planetary gear that is coupled to the first planetary gear and has a second number of teeth that is smaller than the first number of teeth, a movable ring gear that is meshed with the second planetary gear and arranged rotatably, and a transmission member that transmits rotation of the movable ring gear to the drive wheel.
    Type: Application
    Filed: October 22, 2020
    Publication date: June 3, 2021
    Inventors: Katsuhiko SHODA, Kensuke NISHIURA, Kazuma OTAKA
  • Publication number: 20200238352
    Abstract: A power transmission device includes a first power transmission path for transmitting a driving force of a motor to one driven shaft, and a second power transmission path for transmitting the driving force of the motor to another driven shaft. At least one of the first power transmission path or the second power transmission path includes a first intermediate rotor fixed to an output shaft of the motor, a second intermediate rotor rotated by the first intermediate rotor and moving arcuately along an outer circumference of the first intermediate rotor, a driving shaft rotated by the second intermediate rotor and transmitting the driving force to the one driven shaft or the another driven shaft. The driving shaft is configured to move in a direction perpendicular to an axial center direction of the driving shaft in accordance with movement of the second intermediate rotor around the first intermediate rotor.
    Type: Application
    Filed: June 7, 2019
    Publication date: July 30, 2020
    Inventors: Akihiko UMEDA, Katsuhiko SHODA, Kensuke NISHIURA, Kazuma OTAKA
  • Patent number: 8820753
    Abstract: Disclosed is a lubricant sealing structure for a gear coupling, which can firmly prevent the leaking of the lubricant due to vibration or the like in the axial and radial directions inside the gear coupling. A sealing member is a cloth-inserted rubber 21 having flexibility. The cloth-inserted rubber 21 has a first end being fixed to a fixing member 24s on a cover plate 20 mounted on a side of an outer ring 7 and a second end being fixed to another fixing member 25s on a side of the drive shaft 10 in liquid tight manner in the axial direction of a drive shaft 10. Each of the first and second ends of the cloth-inserted rubber 21 has a face extending in a direction that is perpendicular to the axial direction. The cloth-inserted rubber 21 seals the lubricant at the face of said each of the first and second ends.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: September 2, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Fumiharu Takahashi, Akihiko Yano, Katsuhiko Shoda, Hisao Miyake, Shin Koga
  • Patent number: 8800354
    Abstract: An impact load monitoring system for a wind turbine for wind power generation is provided with: an acceleration sensor 28 attached to a step-up gear 18 connected to a main shaft 20; a frequency filter 30 for extracting a monitoring-object component contained in a target frequency domain from vibration data representing a temporal change of amplitude of the acceleration obtained by the acceleration sensor 28; and a determination unit 32 for determining whether or not amplitude of acceleration of the monitoring-object component exceeds a reference value which is set in advance, by comparing the amplitude of the acceleration with the reference value.
    Type: Grant
    Filed: November 28, 2012
    Date of Patent: August 12, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventor: Katsuhiko Shoda
  • Patent number: 8657578
    Abstract: In an object to provide a gear box for a wind turbine generator and a wind turbine generator in which the life of the planet bearings are further enhanced, a gear box of the present invention includes a casing, a carrier, planet pins held to the carrier, planet bearings supported to the planet pins, respectively, a plurality of planet gears supported to the planet pin via the planet bearings, respectively, and a ring gear and a sun gear meshed with the planet gears. In the gear box, the carrier has an inclined surface facing the planet bearing as a part of an outer cylinder part provided on both ends of the planet pins in axial direction of the planet pin and surrounding the outer circumference of the both ends of the planet pins and the incline surface inclines such that the farther from an axial center of the planet pin, the longer a distance between the inclined surface and the planet bearing.
    Type: Grant
    Filed: February 12, 2010
    Date of Patent: February 25, 2014
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Keita Nakashima, Kaoru Iwasaki, Takafumi Yoshida, Hiroaki Takeuchi, Katsuhiko Shoda
  • Publication number: 20120274033
    Abstract: Disclosed is a lubricant sealing structure for a gear coupling, which can firmly prevent the leaking of the lubricant due to vibration or the like in the axial and radial directions inside the gear coupling. A sealing member is a cloth-inserted rubber 21 having flexibility. The cloth-inserted rubber 21 has a first end being fixed to a fixing member 24s on a cover plate 20 mounted on a side of an outer ring 7 and a second end being fixed to another fixing member 25s on a side of the drive shaft 10 in liquid tight manner in the axial direction of a drive shaft 10. Each of the first and second ends of the cloth-inserted rubber 21 has a face extending in a direction that is perpendicular to the axial direction. The cloth-inserted rubber 21 seals the lubricant at the face of said each of the first and second ends.
    Type: Application
    Filed: April 26, 2011
    Publication date: November 1, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Fumiharu TAKAHASHI, Akihiko YANO, Katsuhiko SHODA, Hisao MIYAKE, Shin KOGA
  • Publication number: 20120208669
    Abstract: The present invention provides a gear box for a wind turbine generator which can reduce damage by flaking even when a self-aligning roller bearing is adopted as a planet bearing and a wind turbine generator. The gear box 14 comprises a casing 40; a carrier 52; a plurality of planet pins 54 supported to the carrier 52; self-aligning roller bearings 56 held on the planet pins 54, respectively; the planet gears 58 supported to the planet pins 54 via the self-aligning roller bearing 56, respectively; and a ring gear 60 and a sun gear 62 meshed with the planet gears 58. The planet gears 58 are fixed to the outer race 56B of the self-aligning bearing 56 with an interference fit, respectively, so that each end surface of the outer race 56B of the self-aligning bearing 56 is positioned inner side to an end surface of each planet gears 58.
    Type: Application
    Filed: February 12, 2010
    Publication date: August 16, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keita Nakashima, Kaoru Iwasaki, Takafumi Yoshida, Hiroaki Takeuchi, Katsuhiko Shoda
  • Publication number: 20120091725
    Abstract: A wind turbine generator including a low-cost drive train that allows for reduced weight and reduced length in the axial direction is provided. In a wind turbine generator that generates electricity by driving a generator coupled, by means of a drive train, to a rotor head that has wind-turbine rotor blades attached thereto and rotates together therewith, a gear box (20) of the drive train that transmits torque from the rotor head to the generator includes a star-type gear-box mechanism serving as a first-stage gear-box unit and integrated with a main bearing (50).
    Type: Application
    Filed: September 2, 2009
    Publication date: April 19, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Takafumi Yoshida, Katsuhiko Shoda, Shin Nakayama
  • Publication number: 20120003096
    Abstract: In an object to provide a gear box for a wind turbine generator and a wind turbine generator in which the life of the planet bearings are further enhanced, a gear box of the present invention includes a casing, a carrier, planet pins held to the carrier, planet bearings supported to the planet pins, respectively, a plurality of planet gears supported to the planet pin via the planet bearings, respectively, and a ring gear and a sun gear meshed with the planet gears. In the gear box, the carrier has an inclined surface facing the planet bearing as a part of an outer cylinder part provided on both ends of the planet pins in axial direction of the planet pin and surrounding the outer circumference of the both ends of the planet pins and the incline surface inclines such that the farther from an axial center of the planet pin, the longer a distance between the inclined surface and the planet bearing.
    Type: Application
    Filed: February 12, 2010
    Publication date: January 5, 2012
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Keita Nakashima, Kaoru Iwasaki, Takafumi Yoshida, Hiroaki Takeuchi, Katsuhiko Shoda
  • Publication number: 20110286846
    Abstract: A sun-and-planet speed-up gear includes a low-speed-stage sun-and-planet gearing and a high-speed-stage sun-and-planet gearing, in which an input shaft is connected to a low-speed-stage ring gear, the position of a shaft of a low-speed-stage planet gear is secured, a shaft of a low-speed-stage sun gear is connected to a high-speed-stage carrier, and an output shaft is connected to a high-speed-stage sun gear. In order to automatically center the low-speed-stage sun gear to prevent damage to gears and a bearing, a flange formed at a tip of the shaft of the low-speed-stage sun gear and a flange formed at a tip of a coupling that is directly attached to the high-speed-stage carrier or that is formed on the high-speed-stage carrier are coupled via a sleeve.
    Type: Application
    Filed: January 29, 2010
    Publication date: November 24, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Katsuhiko Shoda, Kenji Sakai, Kazutaka Suzuki
  • Publication number: 20110140448
    Abstract: A wind-turbine-generator-system transmission and a wind turbine generator that can ensure the strength of a bearing and can also minimize seizing and abrasion are provided. In a wind-turbine-generator-system transmission having a sun gear, a planetary gear that meshes with the sun gear and rotates around the sun gear, and an inner tooth that meshes with the planetary gear, the transmission includes a carrier that rotates the planetary gear around the sun gear; a planetary pin that is disposed in the carrier and transmits rotation of the carrier to the planetary gear; a cylindrical sleeve disposed around a periphery of the planetary pin; and a slide bearing that is disposed between the sleeve and the planetary gear and supports the planetary gear in a rotatable manner about the planetary pin.
    Type: Application
    Filed: December 1, 2010
    Publication date: June 16, 2011
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD.
    Inventors: Hiroaki TAKEUCHI, Hideaki NISHIDA, Katsuhiko SHODA, Atsushi YUGE
  • Patent number: 7282808
    Abstract: A power generating wind turbine includes parts and components installed in or on a nacelle which are made smaller and lighter, thus facilitating maintenance. A main shaft 11, a gear-box for speeding up rotation of the main shaft 11 and a generator 13 driven by an output of the gear-box 11 are provided on a nacelle bed plate 6. The main shaft 11 is connected to an input shaft 12a end of the gear-box 12 via a double-row tapered roller bearing 16. The main shaft 11 is supported to a wall portion W1 of the nacelle bed plate 6 with the double-row tapered roller bearing 16 being interposed therebetween. The main shaft 11 is formed in an annular shape having its outer diameter D1 larger than its axial directional length L1.
    Type: Grant
    Filed: September 28, 2004
    Date of Patent: October 16, 2007
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Masaaki Shibata, Hisao Miyake, Tomohiro Numajiri, Yasuyoshi Tozaki, Katsuhiko Shoda
  • Patent number: 7259472
    Abstract: A wind turbine generator including a nacelle having reduced size and weight is provided. The wind turbine generator includes a nacelle disposed on a tower. The nacelle includes a main shaft that is connected to a rotor head equipped with blades and that integrally rotates with the rotor head, a gearbox that increases the rotational speed of the main shaft and that outputs the resulting rotational speed, and a generator driven by the output from the gearbox. In the wind turbine generator, a drivetrain extending from the main shaft to the generator via the gearbox is disposed in the rotor head.
    Type: Grant
    Filed: December 21, 2005
    Date of Patent: August 21, 2007
    Assignee: Mitsubishi Heavy Industries, Ltd
    Inventors: Hisao Miyake, Masaaki Shibata, Yasuyoshi Tozaki, Katsuhiko Shoda
  • Publication number: 20060220389
    Abstract: Provided is a power generating wind turbine in which parts and compoments installed in or on a nacelle are made smaller and lighter and maintenance is facilitated. A main shaft 11, a gear-box speeding up rotation of the main shaft 11 and a generator 13 driven by output of the gear-box 11 are provided on a nacelle bed plate 6. The main shaft 11 is connected to an input shaft 12a end of the gear-box 12 via a double-row tapered roller bearing 16. The main shaft 11 is supported to be fitted to a wall portion W1 of the nacelle bed plate 6 with the double-row tapered roller bearing 16 being interposed therebetween. The main shaft 11 is formed in an annular shape having its outer diameter D1 made larger than its axial directional length L1.
    Type: Application
    Filed: September 28, 2004
    Publication date: October 5, 2006
    Inventors: Masaaki Shibata, Hisao Miyake, Tomohiro Numajiri, Yasuyoshi Tozaki, Katsuhiko Shoda
  • Publication number: 20060138781
    Abstract: A wind turbine generator including a nacelle having reduced size and weight is provided. The wind turbine generator includes a nacelle disposed on a tower. The nacelle includes a main shaft that is connected to a rotor head equipped with blades and that integrally rotates with the rotor head, a gearbox that increases the rotational speed of the main shaft and that outputs the resulting rotational speed, and a generator driven by the output from the gearbox. In the wind turbine generator, a drivetrain extending from the main shaft to the generator via the gearbox is disposed in the rotor head.
    Type: Application
    Filed: December 21, 2005
    Publication date: June 29, 2006
    Applicant: MITSUBISHI HEAVY INDUSTRIES, LTD
    Inventors: Hisao Miyake, Masaaki Shibata, Yasuyoshi Tozaki, Katsuhiko Shoda