Patents by Inventor Jun Ohmura
Jun Ohmura 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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Publication number: 20180172138Abstract: A power system includes: an electric motor that drives wheels of a vehicle; a transmission that is disposed on power transmission paths between the electric motor and the wheels; and a differential gear system that distributes output power shifted by the transmission to the wheels. The transmission includes: a first gear mechanically connected to the electric motor; a second gear that has a rotation axis in common with the first gear and is mechanically connected to a differential gear casing of the differential gear system; a pinion gear that meshes with the first gear and the second gear; and a pinion holder that rotatably supports the pillion gear. The pinion holder has a pinion gear supporting portion which is disposed on a side of the differential gear casing to support the pinion gear, relative to a meshing portion between the second gear and the pinion gear.Type: ApplicationFiled: November 28, 2017Publication date: June 21, 2018Applicant: HONDA MOTOR CO., LTD.Inventors: Yoshihiro NAKANO, Megumi MARUYAMA, Jun OHMURA
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Patent number: 9803741Abstract: A lubricating structure for a differential device includes a pair of baffle plates, fixed to a transmission case, partitioning an internal space between the transmission case, and a differential case and a final driven gear and a second space. The inner surface of the baffle plates has a portion on the first space side that is enlarged to be similar in shape to outer surfaces of rotating bodies defined by trajectories of the differential case and the final driven gear rotated around a rotational axis of inboard shafts. The baffle plates are configured such that the amount of lubricating oil accumulating in the first space is smaller than that in the second space. A through-hole is provided at a position to secure a level of lubricating oil.Type: GrantFiled: February 20, 2015Date of Patent: October 31, 2017Assignee: HONDA MOTOR CO., LTD.Inventors: Jun Ohmura, Yuichi Suenaga, Kouji Ono
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Publication number: 20170302128Abstract: A motor includes a stator including a terminal and a casing that houses the stator, in which the casing includes a casing body with high thermal conductivity that includes an opening in which the terminal is disposed and houses the stator and a casing block disposed in the opening and with an insulating property and high thermal conductivity, and the casing block includes a housing part that houses a distal end portion of the terminal.Type: ApplicationFiled: April 5, 2017Publication date: October 19, 2017Applicant: MINEBEA MITSUMI INC.Inventors: Jun OHMURA, Makoto OTSUKA
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Patent number: 9657825Abstract: A drive device for a vehicle includes a first drive shaft, a second drive shaft, a differential mechanism, a speed reduction mechanism, and a case. The second speed reduction pinion gear of the speed reduction mechanism, and the first pinion gear and the second pinion gear of the differential mechanism are arranged out of phase in a rotation direction, and are arranged at a position in an axial direction so that at least any one of the first pinion gear and the second pinion gear of the differential mechanism overlaps with the second speed reduction pinion gear of the speed reduction mechanism.Type: GrantFiled: February 15, 2013Date of Patent: May 23, 2017Assignee: HONDA MOTOR CO., LTD.Inventors: Jun Ohmura, Shigeru Nakayama
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Publication number: 20170102065Abstract: A lubricating structure for a differential device includes a pair of baffle plates, fixed to a transmission case, partitioning an internal space between the transmission case, and a differential case and a final driven gear and a second space. The inner surface of the baffle plates has a portion on the first space side that is enlarged to be similar in shape to outer surfaces of rotating bodies defined by trajectories of the differential case and the final driven gear rotated around a rotational axis of inboard shafts. The baffle plates are configured such that the amount of lubricating oil accumulating in the first space is smaller than that in the second space. A through-hole is provided at a position to secure a level of lubricating oil.Type: ApplicationFiled: February 20, 2015Publication date: April 13, 2017Inventors: Jun OHMURA, Yuichi SUENAGA, Kouji ONO
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Publication number: 20160204671Abstract: A motor shaft is configured to be press-fitted into a hole formed in a press-fitted component from a front end side in an axial direction. The motor shaft includes: a shaft body; a first annular projection portion that protrudes outwardly in a radial direction of the shaft body and is brought into contact with an inner circumferential surface of the hole the first annular projection portion being positioned at a first position; and a second annular projection portion that protrudes outwardly in the radial direction of the shaft body and is brought into contact with the inner circumferential surface of the hole, the second annular projection portion being positioned at a second position that is shifted from the first position toward a rear end side in the axial direction of the shaft body.Type: ApplicationFiled: January 12, 2016Publication date: July 14, 2016Inventors: Makoto OTSUKA, Yutaka KAMOGI, Jun OHMURA
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Publication number: 20150045170Abstract: A drive device for a vehicle includes a first drive shaft, a second drive shaft, a differential mechanism, a speed reduction mechanism, and a case. The second speed reduction pinion gear of the speed reduction mechanism, and the first pinion gear and the second pinion gear of the differential mechanism are arranged out of phase in a rotation direction, and are arranged at a position in an axial direction so that at least any one of the first pinion gear and the second pinion gear of the differential mechanism overlaps with the second speed reduction pinion gear of the speed reduction mechanism.Type: ApplicationFiled: February 15, 2013Publication date: February 12, 2015Applicant: HONDA MOTOR CO., LTD.Inventors: Jun Ohmura, Shigeru Nakayama
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Patent number: 8628445Abstract: A vehicle driving system includes, a first drive shaft and a second drive shaft; a differential mechanism; a drive input member which inputs a power from a driving power source to the differential mechanism; and a fastening member that fastens the differential mechanism and the drive input member together, wherein the differential mechanism includes: a first sun gear; a second sun gear; a first pinion gear; a second pinion gear that is engaged to the second sun gear and the first pinion gear; and a carrier that is fastened to the drive input member and rotatably supports the first pinion gear and the second pinion gear; and, wherein a spline joint portion that causes the carrier and the drive input member to be fitted in a spline manner is provided at an outer peripheral end portion of the carrier and an inner peripheral end portion of the drive input member.Type: GrantFiled: February 12, 2013Date of Patent: January 14, 2014Assignee: Honda Motor Co., Ltd.Inventor: Jun Ohmura
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Patent number: 7429227Abstract: In a vehicular driving force distribution system, a left or right torque distribution clutch is selectively engaged to lock a carrier member or a sun gear of a planetary gear mechanism, whereby torque can be distributed between left and right wheels. Also, if a differential limitation clutch is engaged to control relative rotation of the sun gear and the carrier member of the planetary gear mechanism, the planetary gear mechanism enters a locked state, so that the left and right wheels are integrated to perform differential limitation. By the arrangement of merely providing the differential limitation clutch, the differential limitation can be performed by simple control and moreover the control response is improved, as compared with the case where differential limitation is performed by controlling engagement forces of the left and right torque distribution clutches.Type: GrantFiled: July 5, 2006Date of Patent: September 30, 2008Assignee: Honda Motor Co., Ltd.Inventors: Kenji Honda, Yasuji Shibahata, Jun Ohmura
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Publication number: 20070021264Abstract: In a vehicular driving force distribution system, a left or right torque distribution clutch is selectively engaged to lock a carrier member or a sun gear of a planetary gear mechanism, whereby torque can be distributed between left and right wheels. Also, if a differential limitation clutch is engaged to control relative rotation of the sun gear and the carrier member of the planetary gear mechanism, the planetary gear mechanism enters a locked state, so that the left and right wheels are integrated to perform differential limitation. By the arrangement of merely providing the differential limitation clutch, the differential limitation can be performed by simple control and moreover the control response is improved, as compared with the case where differential limitation is performed by controlling engagement forces of the left and right torque distribution clutches.Type: ApplicationFiled: July 5, 2006Publication date: January 25, 2007Applicant: HONDA MOTOR CO., LTD.Inventors: Kenji Honda, Yasuji Shibahata, Jun Ohmura
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Patent number: 6700287Abstract: Core sheets are progressively displaced one after the other by a predetermined displacement angle in a circumferential direction of a core in such a manner that stays of the core sheets form a plurality of stairstep-shaped guide walls. Each core sheet includes projections, recesses and a through hole, which are all arranged along a concentric circle that is concentric to a rotational axis of a rotatable shaft of a motor. The projections are arranged in a first axial end surface of the core sheet, and the recesses and the through hole are arranged in a second axial end surface of the core sheet in such a manner that each projection of the core sheet is opposed to a corresponding one of the recesses of the core sheet in the axial direction of the core.Type: GrantFiled: December 19, 2001Date of Patent: March 2, 2004Assignee: Asmo Co., Ltd.Inventors: Jun Ohmura, Ichirou Arai
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Publication number: 20020079778Abstract: Core sheets are progressively displaced one after the other by a predetermined displacement angle in a circumferential direction of a core in such a manner that stays of the core sheets form a plurality of stairstep-shaped guide walls. Each core sheet includes projections, recesses and a through hole, which are all arranged along a concentric circle that is concentric to a rotational axis of a rotatable shaft of a motor. The projections are arranged in a first axial end surface of the core sheet, and the recesses and the through hole are arranged in a second axial end surface of the core sheet in such a manner that each projection of the core sheet is opposed to a corresponding one of the recesses of the core sheet in the axial direction of the core.Type: ApplicationFiled: December 19, 2001Publication date: June 27, 2002Inventors: Jun Ohmura, Ichirou Arai