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).
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Patent number: 10632833Abstract: 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: GrantFiled: October 26, 2018Date of Patent: April 28, 2020Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki Kiyokami, Yota Mizuno, Tatsuo Obata
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Patent number: 10487888Abstract: 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: GrantFiled: November 29, 2016Date of Patent: November 26, 2019Assignees: 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
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Publication number: 20190128179Abstract: 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: ApplicationFiled: October 26, 2018Publication date: May 2, 2019Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Hiroaki KIYOKAMI, Yota MIZUNO, Tatsuo OBATA
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Publication number: 20180127029Abstract: 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: ApplicationFiled: October 27, 2017Publication date: May 10, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yukinobu NISHIKAWA, Hiroaki KIYOKAMI, Yota MIZUNO
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Publication number: 20180080542Abstract: 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: ApplicationFiled: September 11, 2017Publication date: March 22, 2018Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Masataka SUGIYAMA, Yota MIZUNO
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Patent number: 9688132Abstract: 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: GrantFiled: November 18, 2015Date of Patent: June 27, 2017Assignee: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akiko Nishimine, Yota Mizuno, Sohei Murata, Kensei Hata
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Publication number: 20170159727Abstract: 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: ApplicationFiled: November 29, 2016Publication date: June 8, 2017Applicants: 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
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Publication number: 20160207519Abstract: 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: ApplicationFiled: January 13, 2016Publication date: July 21, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kensei HATA, Yuji IWASE, Yosuke SUZUKI, Yota MIZUNO, Akiko NISHIMINE, Sohei MURATA
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Publication number: 20160137050Abstract: 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: ApplicationFiled: November 18, 2015Publication date: May 19, 2016Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Akiko NISHIMINE, Yota MIZUNO, Sohei MURATA, Kensei HATA
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Patent number: 8900089Abstract: 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: GrantFiled: September 9, 2010Date of Patent: December 2, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yota Mizuno, Kenji Odaka, Takayoshi Kato
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Patent number: 8833329Abstract: 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: GrantFiled: March 31, 2010Date of Patent: September 16, 2014Assignee: Toyota Jidosha Kabushiki KaishaInventors: Tomoyuki Kasuga, Takashi Shimizu, Yukinobu Nishikawa, Yota Mizuno, Yuji Shimada, Kenji Odaka
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Patent number: 8415849Abstract: 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: GrantFiled: July 4, 2007Date of Patent: April 9, 2013Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yota Mizuno, Hiroshi Hata
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Publication number: 20120057929Abstract: 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: ApplicationFiled: March 31, 2010Publication date: March 8, 2012Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Tomoyuki Kasuga, Takashi Shimizu, Yukinobu Nishikawa, Yota Mizuno, Yuji Shimada, Kenji Odaka
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Patent number: 8128528Abstract: 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: GrantFiled: December 20, 2005Date of Patent: March 6, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kenji Tanabe, Yota Mizuno, Hiroshi Hata
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Patent number: 8097997Abstract: 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: GrantFiled: February 24, 2005Date of Patent: January 17, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yota Mizuno, Yuji Shimada, Hiroshi Hata, Akito Okawa, Kinji Tange, Kinya Yoshii, Masatoshi Adachi
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Publication number: 20110009233Abstract: 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: ApplicationFiled: September 9, 2010Publication date: January 13, 2011Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yota Mizuno, Kenji Odaka, Takayoshi Kato
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Patent number: 7628091Abstract: 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: GrantFiled: February 24, 2005Date of Patent: December 8, 2009Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yota Mizuno, Mitsuyasu Ukita
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Publication number: 20090278417Abstract: 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: ApplicationFiled: July 4, 2007Publication date: November 12, 2009Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Yota Mizuno, Hiroshi Hata
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Publication number: 20080300097Abstract: 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: ApplicationFiled: December 20, 2005Publication date: December 4, 2008Applicant: Toyota Jidosha Kabushiki KaishaInventors: Kenji Tanabe, Yota Mizuno, Hiroshi Hata
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Publication number: 20080217867Abstract: 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: ApplicationFiled: September 20, 2006Publication date: September 11, 2008Applicant: Toyota Jidosha Kabushiki KaishaInventors: Yosuke Kato, Yota Mizuno, Kenji Tanabe, Hiroshi Hata, Toshiharu Hirai, Toshihiko Ishida