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: 20240055928Abstract: To achieve miniaturization in the rotation axis direction. A motor includes a stator housing having an inner peripheral portion and an outer peripheral portion, a stator supported by an outer peripheral portion of the stator housing, a rotor housing covering the stator housing and the stator, and a magnet supported by an outer peripheral portion of the rotor housing. The stator includes a first surface provided at an inner side of the magnet, supported by the stator housing and positioned in a rotation axis direction, and a second surface opposing an outside in the rotation axis direction. A surface of the magnet supported by the rotor housing is provided at an upper surface portion side of the stator core in the rotation axis direction.Type: ApplicationFiled: December 16, 2021Publication date: February 15, 2024Inventor: Jun OHMURA
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Patent number: 11808341Abstract: A rotating device includes a motor, a gear, and a housing configured to accommodate the motor and the gear. The housing includes a first housing, a second housing, and a joining element for joining the first housing and the second housing. The first housing includes a first attaching part attached to an external device. The second housing includes a second attaching part attached to the external device. The first attaching part and the second attaching part include surfaces opposing each other after the housing is assembled. The first attaching part and the second attaching part include the joining element.Type: GrantFiled: February 8, 2022Date of Patent: November 7, 2023Assignee: MINEBEA MITSUMI Inc.Inventors: Koichiro Hirabayashi, Yukimasa Matsumura, Jun Ohmura, Kodai Kameoka
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Publication number: 20230327513Abstract: A motor includes: a lid including an opening; a bracket including a projecting part; and a terminal extending from the projecting part. A part of the bracket is covered by the lid. The projecting part projects from the opening of the lid.Type: ApplicationFiled: March 20, 2023Publication date: October 12, 2023Inventors: Jun OHMURA, Koichiro HIRABAYASHI, Yukimasa MATSUMURA
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Patent number: 11757327Abstract: A motor (1) including a rotary shaft (2) and a bearing portion (53) including an inner ring and an outer ring and a magnet (51) and a balance adjusting portion (52). The balance adjusting portion (52) and the magnet (51) are fixed. The balance adjusting portion (52) is in contact with an inner ring of the bearing portion (53).Type: GrantFiled: March 14, 2022Date of Patent: September 12, 2023Assignee: MINEBEA MITSUMI Inc.Inventor: Jun Ohmura
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Publication number: 20220268350Abstract: A rotating device includes a motor, a gear, and a housing configured to accommodate the motor and the gear. The housing includes a first housing, a second housing, and a joining element for joining the first housing and the second housing. The first housing includes a first attaching part attached to an external device. The second housing includes a second attaching part attached to the external device. The first attaching part and the second attaching part include surfaces opposing each other after the housing is assembled. The first attaching part and the second attaching part include the joining element.Type: ApplicationFiled: February 8, 2022Publication date: August 25, 2022Inventors: Koichiro HIRABAYASHI, Yukimasa MATSUMURA, Jun OHMURA, Kodai KAMEOKA
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Publication number: 20220200399Abstract: A motor (1) including a rotary shaft (2) and a bearing portion (53) including an inner ring and an outer ring and a magnet (51) and a balance adjusting portion (52). The balance adjusting portion (52) and the magnet (51) are fixed. The balance adjusting portion (52) is in contact with an inner ring of the bearing portion (53).Type: ApplicationFiled: March 14, 2022Publication date: June 23, 2022Inventor: Jun OHMURA
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Patent number: 11322998Abstract: A rotor according to an embodiment includes a cylindrical magnet, a holder, and a balance adjusting portion. The cylindrical magnet has a bore portion into which a rotary shaft is inserted, the inner diameter of the bore portion being larger than the outer diameter of the rotary shaft. The holder is made of resin, and has a tubular portion formed in the bore portion of the magnet and a protruding portion protruding from the magnet in the rotation axis direction, the holder being press-fitted onto the rotary shaft. The balance adjusting portion is press-fitted onto the rotary shaft with the protruding portion interposed therebetween.Type: GrantFiled: August 27, 2018Date of Patent: May 3, 2022Assignee: MINEBEA MITSUMI Inc.Inventor: Jun Ohmura
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Patent number: 11277053Abstract: A rotor according to an embodiment includes a cylindrical magnet and a balance adjusting portion. The balance adjusting portion is provided to at least one end portion of the magnet in a rotation axis direction, and is used for adjusting rotational balance of the rotor. The balance adjusting portion has a first member that is in contact with an end portion of the magnet and a second member press-fitted onto the rotary shaft with the first member interposed therebetween.Type: GrantFiled: August 27, 2018Date of Patent: March 15, 2022Assignee: MINEBEA MITSUMI, INC.Inventor: Jun Ohmura
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Publication number: 20210367460Abstract: A stator of a motor includes a plurality of magnetic bodies stacked in a direction of a central axis (X), a case configured to hold the plurality of magnetic bodies, a cover configured to cover the case, and a pillar including a guiding part configured to guide the plurality of magnetic bodies in the direction of the central axis (X). The plurality of magnetic bodies include a guided part guided by the pillar. The pillar includes an outer peripheral surface including positioning parts. The positioning parts determine relative positions of the case and the cover in an axial direction.Type: ApplicationFiled: May 13, 2021Publication date: November 25, 2021Inventor: Jun OHMURA
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Publication number: 20210075294Abstract: A rotor according to an embodiment includes a cylindrical magnet and a balance adjusting portion. The balance adjusting portion is provided to at least one end portion of the magnet in a rotation axis direction, and is used for adjusting rotational balance of the rotor. The balance adjusting portion has a first member that is in contact with an end portion of the magnet and a second member press-fitted onto the rotary shaft with the first member interposed therebetween.Type: ApplicationFiled: August 27, 2018Publication date: March 11, 2021Inventor: Jun OHMURA
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Publication number: 20210057947Abstract: A rotor according to an embodiment includes a cylindrical magnet, a holder, and a balance adjusting portion. The cylindrical magnet has a bore portion into which a rotary shaft is inserted, the inner diameter of the bore portion being larger than the outer diameter of the rotary shaft. The holder is made of resin, and has a tubular portion formed in the bore portion of the magnet and a protruding portion protruding from the magnet in the rotation axis direction, the holder being press-fitted onto the rotary shaft. The balance adjusting portion is press-fitted onto the rotary shaft with the protruding portion interposed therebetween.Type: ApplicationFiled: August 27, 2018Publication date: February 25, 2021Inventor: Jun OHMURA
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Patent number: 10844943Abstract: A drive shaft (7) as a rotating body includes an engaging portion (7c) engaging with a side gear (14) and a sliding portion (7b) abutted by a differential case (9). The engaging portion (7c) includes a plurality of engaging grooves (15). The engaging grooves (15) engage with the side gear (14). The engaging portion (7c) includes a small diameter portion (15d) at a position corresponding to between the drive shaft (7) and the differential case (9) in a direction of a rotational axis L1. The small diameter portion (15d) has an outer diameter smaller than the outer diameter of the sliding portion (7b).Type: GrantFiled: October 21, 2016Date of Patent: November 24, 2020Assignee: HONDA MOTOR CO., LTD.Inventors: Jun Ohmura, Koji Ono
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Patent number: 10396623Abstract: A motor includes: a motor shaft including a press-fitting surface; and a first annular projection group and a second annular projection group formed in the press-fitting surface of the motor shaft. The first annular projection group and the second annular projection group are separated from each other in an axial direction, a distance between an adjacent two of annular projections in the first annular projection group and a distance between an adjacent two of annular projections in the second annular projection group are smaller than a distance between the first annular projection group and the second annular projection group in the axial direction.Type: GrantFiled: October 24, 2018Date of Patent: August 27, 2019Assignee: Minebea Co., Ltd.Inventors: Makoto Otsuka, Yutaka Kamogi, Jun Ohmura
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Patent number: 10378641Abstract: 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: GrantFiled: November 28, 2017Date of Patent: August 13, 2019Assignee: HONDA MOTOR CO., LTD.Inventors: Yoshihiro Nakano, Megumi Maruyama, Jun Ohmura
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Patent number: 10291095Abstract: 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: GrantFiled: April 5, 2017Date of Patent: May 14, 2019Assignee: MINEBEA MITSUMI INC.Inventors: Jun Ohmura, Makoto Otsuka
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Patent number: 10281021Abstract: A power system includes an electric motor, a transmission, and a differential gear system. The transmission includes a first gear that is 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 pinion gear. The pinion holder has a pinion gear supporting portion which is disposed on a side of the differential gear casing of the differential gear system to support the pinion gear, relative to a meshing portion between the second gear and the pinion gear. An inner diameter of the second gear at the meshing portion is equal to or smaller than an outer diameter of the pinion holder.Type: GrantFiled: December 8, 2017Date of Patent: May 7, 2019Assignee: HONDA MOTOR CO., LTD.Inventor: Jun Ohmura
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Publication number: 20190072166Abstract: A drive shaft (7) as a rotating body includes an engaging portion (7c) engaging with a side gear (14) and a sliding portion (7b) abutted by a differential case (9). The engaging portion (7c) includes a plurality of engaging grooves (15). The engaging grooves (15) engage with the side gear (14). The engaging portion (7c) includes a small diameter portion (15d) at a position corresponding to between the drive shaft (7) and the differential case (9) in a direction of a rotational axis L1. The small diameter portion (15d) has an outer diameter smaller than the outer diameter of the sliding portion (7b).Type: ApplicationFiled: October 21, 2016Publication date: March 7, 2019Applicants: HONDA MOTOR CO., LTD., HONDA MOTOR CO., LTD.Inventors: Jun Ohmura, Koji Ono
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Publication number: 20190058371Abstract: A motor includes: a motor shaft including a press-fitting surface; and a first annular projection group and a second annular projection group formed in the press-fitting surface of the motor shaft. The first annular projection group and the second annular projection group are separated from each other in an axial direction, a distance between an adjacent two of annular projections in the first annular projection group and a distance between an adjacent two of annular projections in the second annular projection group are smaller than a distance between the first annular projection group and the second annular projection group in the axial direction.Type: ApplicationFiled: October 24, 2018Publication date: February 21, 2019Inventors: Makoto OTSUKA, Yutaka KAMOGI, Jun OHMURA
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Patent number: 10141812Abstract: 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: GrantFiled: January 12, 2016Date of Patent: November 27, 2018Assignee: Minebea Co., Ltd.Inventors: Makoto Otsuka, Yutaka Kamogi, Jun Ohmura
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Publication number: 20180172130Abstract: A power system includes an electric motor, a transmission, and a differential gear system. The transmission includes a first gear that is 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 pinion gear. The pinion holder has a pinion gear supporting portion which is disposed on a side of the differential gear casing of the differential gear system to support the pinion gear, relative to a meshing portion between the second gear and the pinion gear. An inner diameter of the second gear at the meshing portion is equal to or smaller than an outer diameter of the pinion holder.Type: ApplicationFiled: December 8, 2017Publication date: June 21, 2018Applicant: HONDA MOTOR CO., LTD.Inventor: Jun OHMURA