Patents by Inventor Yota Mizuno

Yota Mizuno 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: 10632833
    Abstract: In a vehicle drive device, a case cover includes a cylindrical wall portion formed circumferentially in an outside space of a first rotating shaft and projecting toward the case parallel to an axial direction of the first rotating shaft, an oil pump includes a pump cover arranged in a space radially inside the wall portion and a pump chamber formed in a space radially inside the wall portion by the case cover including the wall portion and the pump cover to house the pump gear, and the wall portion includes a support portion disposed on the other axial end side of the first rotating shaft relative to the pump cover, having a bearing fitted thereto, and rotatably supporting a second rotating shaft via the bearing.
    Type: Grant
    Filed: October 26, 2018
    Date of Patent: April 28, 2020
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroaki Kiyokami, Yota Mizuno, Tatsuo Obata
  • Patent number: 10487888
    Abstract: Since one end of a spring is received by a planar portion of a spring seat provided on any one of an outer plate and an inner plate, it is possible to support the spring with a planar member without machining a bottom wall face of the outer plate into a planar shape. Since the spring seat has seat guide portions that contact the outer plate, it is possible to suppress the fluctuation of the spring seat and the fluctuation of the spring by the seat guide portions, so it is possible to reliably prevent interference of the spring with its peripheral portion. Therefore, a load on the spring is reduced, so it is possible to improve the durability of a one-way clutch.
    Type: Grant
    Filed: November 29, 2016
    Date of Patent: November 26, 2019
    Assignees: TOYOTA JIDOSHA KABUSHIKI KAISHA, NSK-WARNER K.K.
    Inventors: Michinobu Suzuki, Yuji Iwase, Shotaro Kato, Michitaka Tsuchida, Yota Mizuno, Koichi Kato, Takaya Yamada, Hiroyuki Ohishi, Tomoyuki Miyazaki
  • Publication number: 20190128179
    Abstract: In a vehicle drive device, a case cover includes a cylindrical wall portion formed circumferentially in an outside space of a first rotating shaft and projecting toward the case parallel to an axial direction of the first rotating shaft, an oil pump includes a pump cover arranged in a space radially inside the wall portion and a pump chamber formed in a space radially inside the wall portion by the case cover including the wall portion and the pump cover to house the pump gear, and the wall portion includes a support portion disposed on the other axial end side of the first rotating shaft relative to the pump cover, having a bearing fitted thereto, and rotatably supporting a second rotating shaft via the bearing.
    Type: Application
    Filed: October 26, 2018
    Publication date: May 2, 2019
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Hiroaki KIYOKAMI, Yota MIZUNO, Tatsuo OBATA
  • Publication number: 20180127029
    Abstract: A vehicle structure includes a pair of right and left front side members, a rotary electric machine, a casing disposed in close proximity to one front side member, a cover closing an opening portion of the casing, and a connector attached to a part of the cover that is the closest to a flange portion. The casing includes the opening portion facing the one front side member side and a thick portion surrounding the opening portion. The cover includes the flange portion overlapping with the thick portion of the casing in close contact with the thick portion of the casing. The connector is disposed at a position where the one front side member is deformed and pressed when the one front side member is subjected to a load equivalent to a load applied in a small overlap collision test or an oblique collision test.
    Type: Application
    Filed: October 27, 2017
    Publication date: May 10, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yukinobu NISHIKAWA, Hiroaki KIYOKAMI, Yota MIZUNO
  • Publication number: 20180080542
    Abstract: A gear apparatus according to the present disclosure includes: a sun gear; a carrier to which planetary gear shafts rotatably supporting multiple planetary gears meshing with this sun gear are fixed; an external gear portion; a gear cylinder having an internal gear portion meshing with the planetary gears; a gear meshing with the external gear portion of the gear cylinder; a lubricating oil passage formed in the planetary gears shafts, the lubricating oil passage configured to supply the lubricating oil to respective mashing parts between the planetary gears and the internal gear portion and between the planetary gears and the sun gear; and a lubricating oil guiding passage having one end opening to an inner circumferential surface of the gear cylinder, and discharging the lubricating oil present on an inner circumferential surface of the gear cylinder toward the meshing part between the external gear portion and the gear.
    Type: Application
    Filed: September 11, 2017
    Publication date: March 22, 2018
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Masataka SUGIYAMA, Yota MIZUNO
  • Patent number: 9688132
    Abstract: A hybrid vehicle uses a first motor, a second motor and an engine as driving force sources and includes a gear transmission mechanism and an oil supply mechanism. The gear transmission mechanism transmits torque, output from the first motor, to a drive shaft side. The oil supply mechanism is driven by power other than power of the engine to supply oil to the gear transmission mechanism. When the hybrid vehicle is caused to travel by using the torque output from at least the first motor in a state where operation of the engine is stopped, and when an estimated amount of oil that is supplied from the oil supply mechanism to the gear transmission mechanism is smaller than or equal to a predetermined amount, an electronic control unit limits an operation state of the first motor such that load on the gear transmission mechanism decreases.
    Type: Grant
    Filed: November 18, 2015
    Date of Patent: June 27, 2017
    Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akiko Nishimine, Yota Mizuno, Sohei Murata, Kensei Hata
  • Publication number: 20170159727
    Abstract: Since one end of a spring is received by a planar portion of a spring seat provided on any one of an outer plate and an inner plate, it is possible to support the spring with a planar member without machining a bottom wall face of the outer plate into a planar shape. Since the spring seat has seat guide portions that contact the outer plate, it is possible to suppress the fluctuation of the spring seat and the fluctuation of the spring by the seat guide portions, so it is possible to reliably prevent interference of the spring with its peripheral portion. Therefore, a load on the spring is reduced, so it is possible to improve the durability of a one-way clutch.
    Type: Application
    Filed: November 29, 2016
    Publication date: June 8, 2017
    Applicants: TOYOTA JIDOSHA KABUSHIKI KAISHA, NSK-WARNER K.K.
    Inventors: Michinobu SUZUKI, Yuji IWASE, Shotaro KATO, Michitaka TSUCHIDA, Yota MIZUNO, Koichi KATO, Takaya YAMADA, Hiroyuki OHISHI, Tomoyuki MIYAZAKI
  • Publication number: 20160207519
    Abstract: A drive control system for a hybrid vehicle comprises a lubricating oil passage, a first oil pump, an electronic control unit, and an electronic control unit. The lubricating oil passage is configured to supply lubricating oil to the power split mechanism by causing the lubricating oil to flow outward in a radial direction of a power split mechanism. The first oil pump is configured to be allowed to be driven by a first motor, and configured to generate hydraulic pressure of the lubricating oil that lubricates the power split mechanism. The electronic control unit is configured to, when the hybrid vehicle is set to a one-motor mode after traveling in a two-motor mode, execute control for increasing an amount of the lubricating oil that is supplied to the power split mechanism by driving the first motor.
    Type: Application
    Filed: January 13, 2016
    Publication date: July 21, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Kensei HATA, Yuji IWASE, Yosuke SUZUKI, Yota MIZUNO, Akiko NISHIMINE, Sohei MURATA
  • Publication number: 20160137050
    Abstract: A hybrid vehicle uses a first motor, a second motor and an engine as driving force sources and includes a gear transmission mechanism and an oil supply mechanism. The gear transmission mechanism transmits torque, output from the first motor, to a drive shaft side. The oil supply mechanism is driven by power other than power of the engine to supply oil to the gear transmission mechanism. When the hybrid vehicle is caused to travel by using the torque output from at least the first motor in a state where operation of the engine is stopped, and when an estimated amount of oil that is supplied from the oil supply mechanism to the gear transmission mechanism is smaller than or equal to a predetermined amount, an electronic control unit limits an operation state of the first motor such that load on the gear transmission mechanism decreases.
    Type: Application
    Filed: November 18, 2015
    Publication date: May 19, 2016
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Akiko NISHIMINE, Yota MIZUNO, Sohei MURATA, Kensei HATA
  • Patent number: 8900089
    Abstract: The present invention is aimed to provide a carrier assembly which can be made small in size while securing a sufficient fixing strength between a first carrier plate and a second carrier plate. The second carrier plate (8) has a plurality of connection elements (23) bent toward the first carrier plate (7) to weld and fix the outwardly projected end portions (23b) of the connection elements with the outwardly projected end portion of the first carrier plate (7) by electron beam welding. The connection elements each have a base portions (23a) formed with a notch (28). The notch (28) thus formed makes a gap S between the base portion of the connection element and the corner portion (29) of the pinion gear.
    Type: Grant
    Filed: September 9, 2010
    Date of Patent: December 2, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yota Mizuno, Kenji Odaka, Takayoshi Kato
  • Patent number: 8833329
    Abstract: A hybrid transaxle 200 that is a transmission is provided with a junction surface 20 that contacts a junction surface of an internal combustion engine. A bolt span portion 20a of the junction surface 20 is provided with a protrusion portion 25 that elastically deforms so that the internal combustion engine-side junction surface and the hybrid transaxle 200-side junction surface 20 closely contact each other.
    Type: Grant
    Filed: March 31, 2010
    Date of Patent: September 16, 2014
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Tomoyuki Kasuga, Takashi Shimizu, Yukinobu Nishikawa, Yota Mizuno, Yuji Shimada, Kenji Odaka
  • Patent number: 8415849
    Abstract: An injection apparatus includes a gate for injecting a filler to a gap between an inner wall of a slot and a permanent magnet. A plurality of gates are provided for one slot. An IPM rotor with improved NV characteristics, and method and apparatus for manufacturing such an IPM rotor can be provided by such a structure.
    Type: Grant
    Filed: July 4, 2007
    Date of Patent: April 9, 2013
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yota Mizuno, Hiroshi Hata
  • Publication number: 20120057929
    Abstract: A hybrid transaxle 200 that is a transmission is provided with a junction surface 20 that contacts a junction surface of an internal combustion engine. A bolt span portion 20a of the junction surface 20 is provided with a protrusion portion 25 that elastically deforms so that the internal combustion engine-side junction surface and the hybrid transaxle 200-side junction surface 20 closely contact each other.
    Type: Application
    Filed: March 31, 2010
    Publication date: March 8, 2012
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Tomoyuki Kasuga, Takashi Shimizu, Yukinobu Nishikawa, Yota Mizuno, Yuji Shimada, Kenji Odaka
  • Patent number: 8128528
    Abstract: A planetary gear set includes a sun gear; pinions that are positioned around the sun gear and that mesh with the sun gear; and a ring gear that is positioned on the outer side of the pinions and that meshes with the pinions. Each pinion has a plurality of teeth on the outer surface thereof. Each tooth has a first tooth surface and a second tooth surface on opposite sides of the tooth, which can contact tooth surfaces of the sun gear and the ring gear. The deviation of the first tooth surface from the corresponding reference surface differs from the deviation of the second tooth surface from the corresponding reference surface.
    Type: Grant
    Filed: December 20, 2005
    Date of Patent: March 6, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Tanabe, Yota Mizuno, Hiroshi Hata
  • Patent number: 8097997
    Abstract: A transaxle includes a case having an opening, a second rotating electric machine stored in the opening of the case and having a stator, a rear planetary gear stored in the transaxle case and connected to the second rotating electric machine, a transaxle rear cover sealing the opening and a bolt fixing the second rotating electric machine to the transaxle case. The stator has first and second thrust end faces defining an axial length thereof. The first thrust end face is pressed against an inner surface of the case.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: January 17, 2012
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yota Mizuno, Yuji Shimada, Hiroshi Hata, Akito Okawa, Kinji Tange, Kinya Yoshii, Masatoshi Adachi
  • Publication number: 20110009233
    Abstract: The present invention is aimed to provide a carrier assembly which can be made small in size while securing a sufficient fixing strength between a first carrier plate and a second carrier plate. The second carrier plate (8) has a plurality of connection elements (23) bent toward the first carrier plate (7) to weld and fix the outwardly projected end portions (23b) of the connection elements with the outwardly projected end portion of the first carrier plate (7) by electron beam welding. The connection elements each have a base portions (23a) formed with a notch (28). The notch (28) thus formed makes a gap S between the base portion of the connection element and the corner portion (29) of the pinion gear.
    Type: Application
    Filed: September 9, 2010
    Publication date: January 13, 2011
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yota Mizuno, Kenji Odaka, Takayoshi Kato
  • Patent number: 7628091
    Abstract: A composite gear, wherein an external gear and a rotation Support surface are formed on the outer peripheral surface thereof and a first internal gear and a second internal gear are formed on the inner peripheral surface thereof at a predetermined interval in the rotating axis direction. A chuck portion is formed on the inner peripheral surface between the first terminal gear and the second internal gear, and the inner diameter of the chuck portion is smaller than at least one of the diameter of the tip of the first internal gear and the diameter of the tip of the second internal gear.
    Type: Grant
    Filed: February 24, 2005
    Date of Patent: December 8, 2009
    Assignee: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yota Mizuno, Mitsuyasu Ukita
  • Publication number: 20090278417
    Abstract: An injection apparatus includes a gate for injecting a filler to a gap between an inner wall of a slot and a permanent magnet. A plurality of gates are provided for one slot. An IPM rotor with improved NV characteristics, and method and apparatus for manufacturing such an IPM rotor can be provided by such a structure.
    Type: Application
    Filed: July 4, 2007
    Publication date: November 12, 2009
    Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA
    Inventors: Yota Mizuno, Hiroshi Hata
  • Publication number: 20080300097
    Abstract: A planetary gear set includes a sun gear; pinions that are positioned around the sun gear and that mesh with the sun gear; and a ring gear that is positioned on the outer side of the pinions and that meshes with the pinions. Each pinion has a plurality of teeth on the outer surface thereof. Each tooth has a first tooth surface and a second tooth surface on opposite sides of the tooth, which can contact tooth surfaces of the sun gear and the ring gear. The deviation of the first tooth surface from the corresponding reference surface differs from the deviation of the second tooth surface from the corresponding reference surface.
    Type: Application
    Filed: December 20, 2005
    Publication date: December 4, 2008
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Kenji Tanabe, Yota Mizuno, Hiroshi Hata
  • Publication number: 20080217867
    Abstract: A sealing structure of a casing includes a housing having a flow path, a case having a flow path communicating with the flow path when combined with the housing, a tubular knock pin provided to fit to both of the housing and the case and surround the flow path in a joint portion between the housing and the case, and an FIPG holding portion provided on an outer circumferential side of the knock pin.
    Type: Application
    Filed: September 20, 2006
    Publication date: September 11, 2008
    Applicant: Toyota Jidosha Kabushiki Kaisha
    Inventors: Yosuke Kato, Yota Mizuno, Kenji Tanabe, Hiroshi Hata, Toshiharu Hirai, Toshihiko Ishida