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公开(公告)号：US20190173359A1
公开(公告)日：2019-06-06
申请号：US16323912
申请日：2017-08-07
Applicant: Nidec Corporation
Inventor： Yuki ISHIKAWA , Takayuki MIGITA , Yasuo YAMAGUCHI
Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis extending in a horizontal direction, and a stator radially outside of the rotor, a housing including a housing space to house the motor, oil in a vertically lower region of the housing space, and an oil passage to feed the oil from the vertically lower region of the housing space to the motor. A channel of the oil passage includes a main reservoir and an auxiliary reservoir to store the oil. Each of the main reservoir and the auxiliary reservoir includes an outflow port to feed the oil to the motor. The main reservoir is located on an upstream side of the auxiliary reservoir in the oil passage. The auxiliary reservoir is structured to receive a portion of the oil overflowing from the main reservoir.
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公开(公告)号：US20190173358A1
公开(公告)日：2019-06-06
申请号：US16323910
申请日：2017-08-08
Applicant: Nidec Corporation
Inventor： Yuki ISHIKAWA , Yasuo YAMAGUCHI , Takayuki MIGITA
Abstract: A motor unit includes a motor including a rotor to rotate about a motor axis extending in a horizontal direction, a differential connected to the motor, a housing including a housing space to house the motor and the differential, oil in a vertically lower region of the housing space, and an oil passage to feed the oil from the vertically lower region of the housing space to the motor. A pump is fixed to an outer peripheral surface of the housing and is located in a channel of the oil passage. The pump is on an opposite side of the motor axis with respect to the differential when viewed in an axial direction of the motor axis.
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公开(公告)号：US20190036426A1
公开(公告)日：2019-01-31
申请号：US16148177
申请日：2018-10-01
Applicant: NIDEC CORPORATION
Inventor： Tomoyuki UMEDA , Takayuki MIGITA
IPC: H02K11/40 , H02K1/18 , H02K1/32 , H02K3/52 , H02K5/173 , H02K5/22 , H02K7/08 , H02K7/14 , H02K11/30 , H02K21/16 , F04D19/00 , F04D29/18
Abstract: A motor may include a rotor rotating on a central axis; a stator located radially outside the rotor; a bearing supporting the rotor such that the rotor is rotatable with respect to the stator; and a holder that holds the stator. The stator may include a stator core; and a coil. The holder may include a cover disposed on an axially first side of the coil; and a bracket that is electrically connected to and fixed to the cover, is disposed on an axially second side of the coil, and is connectable to a ground. The holder may have an opening that penetrates the holder in a radial direction and is located between the axially first-side end of the coil and the cover, and an opening that penetrates the holder in the radial direction and is located between the axially second-side end of the coil and the bracket.
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公开(公告)号：US20210305875A1
公开(公告)日：2021-09-30
申请号：US17205074
申请日：2021-03-18
Applicant: Nidec Corporation
Inventor： Shunsuke TAKAHASHI , Takayuki MIGITA , Takumi OKADA
Abstract: In manufacturing a motor, a second protrusion of a lead bushing is inserted into a second through-hole in a bearing holder. A diameter increased portion on an upper end of the second protrusion fixes the lead bushing to the bearing holder. This configuration thus requires less dimensional accuracy as compared with a case where the lead bushing is press fitted to the bearing holder.
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公开(公告)号：US20200161937A1
公开(公告)日：2020-05-21
申请号：US16631890
申请日：2018-06-19
Applicant: NIDEC CORPORATION
Inventor： Yuki ISHIKAWA , Takayuki MIGITA , Shuhei NAKAMATSU
Abstract: One aspect of a motor of the present disclosure may include a rotor having a motor shaft disposed along a central axis extending in one direction, a stator facing the rotor via a gap in a radial direction, and a housing having an accommodating portion configured to accommodate the rotor and the stator, and to enable oil to be stored therein, wherein the housing comprises a lower wall portion facing a vertical-directional lower region in the inside of the accommodating portion, the lower wall portion comprises a cooling flow passage formed therein, and refrigerant flows in the cooling flow passage, and at least a portion of the cooling flow passage overlaps the vertical-directional lower region in the inside of the accommodating portion when viewed along a vertical direction.
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Patent Agency Ranking
公开(公告)号：US20200007009A1
公开(公告)日：2020-01-02
申请号：US16323632
申请日：2017-08-07
Applicant: Nidec Corporation
Inventor： Takayuki MIGITA , Yuki ISHIKAWA , Shuhei NAKAMATSU
IPC: H02K9/193 , H02K11/225
Abstract: In a drive device, a housing includes an outer lid that covers one side in an axial direction of a motor shaft. A pump includes an external gear fixed to an end on one side in the axial direction of the motor shaft, an internal gear surrounding a radial outside of the external gear and meshing with the external gear, a pump room recessed from a surface on the other side in the axial direction of an outer lid toward one side in the axial direction, the pump room accommodating the internal gear and the external gear, a suction port through which the oil is to be sucked into the pump room, and a discharge port through which the oil is to be discharged from the pump room. The motor shaft includes a motor shaft body to which a rotor core is fixed and a closer fixed to the motor shaft body to overlap the internal gear, and close at least a portion of the opening on the other side in the axial direction of the pump room.
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公开(公告)号：US20190190356A1
公开(公告)日：2019-06-20
申请号：US16282468
申请日：2019-02-22
Applicant: Nidec Corporation
Inventor： Yasuaki NAKAHARA , Takayuki MIGITA , Hiroshi KITAGAKI , Takeshi HONDA , Hisashi FUJIHARA
CPC classification number: H02K15/024 , H02K1/165 , H02K1/18 , H02K3/12 , H02K3/28 , H02K15/02 , H02K15/095
Abstract: A stator includes core pieces in which at least first and second laminate members are laminated, the first laminate member includes a first tooth portion and a first core back portion, the second laminate member includes a second tooth portion and a second core back portion, the first core back portion includes a first protrusion on one side thereof in a circumferential direction and a first recess on the other side thereof in the circumferential direction, the second core back portion includes a second recess on one side thereof in a circumferential direction and a second protrusion on the other side thereof in the circumferential direction, and an area of a region in which the first and second core back portions of the core piece adjacent thereto overlap in a lamination direction is greater than a circumferential cross-sectional area of the first core back portion circumferentially inward from the first protrusion.
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公开(公告)号：US20190190325A1
公开(公告)日：2019-06-20
申请号：US16282470
申请日：2019-02-22
Applicant: Nidec Corporation
Inventor： Yasuaki NAKAHARA , Takayuki MIGITA , Hiroshi KITAGAKI , Takeshi HONDA , Hisashi FUJIHARA
CPC classification number: H02K1/148 , H02K1/12 , H02K1/18 , H02K15/02 , H02K15/022
Abstract: A stator includes core pieces in which at least first and second laminate members are laminated, the first laminate member includes a first tooth portion and a first core back portion, the second laminate member includes a second tooth portion and a second core back portion, the first core back portion includes a first protrusion on one side thereof in a circumferential direction and a first recess on another side thereof in the circumferential direction, the second core back portion includes a second recess on one side thereof in a circumferential direction and a second protrusion on the other side thereof in the circumferential direction, and an area of a region in which the first core back portion and the second core back portion of the core piece adjacent thereto overlap in a lamination direction is greater than a circumferential cross-sectional area of the first core back portion circumferentially inward from the first protrusion.
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公开(公告)号：US20190173344A1
公开(公告)日：2019-06-06
申请号：US16323908
申请日：2017-08-01
Applicant: Nidec Corporation
Inventor： Yuki ISHIKAWA , Takayuki MIGITA
Abstract: A motor includes a rotor to rotate about a motor axis, and a stator radially outside of the rotor. The rotor includes a shaft extending along the motor axis, and a rotor core surrounding the shaft from radially outside. The shaft includes a hollow portion including an inner circumferential surface extending along an axial direction, and a communicating hole extending in a radial direction to bring a space outside of the shaft and the hollow portion into communication with each other, the hollow portion being structured to allow oil to be fed thereinto. The inner circumferential surface of the hollow portion includes a recessed groove extending along a circumferential direction. The communicating hole opens into the hollow portion at the recessed groove.
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公开(公告)号：US20180351428A1
公开(公告)日：2018-12-06
申请号：US16058324
申请日：2018-08-08
Applicant: NIDEC CORPORATION
Inventor： Toshiya OKAMOTO , Shota KAWASHIMA , Masato AONO , Takayuki MIGITA
Abstract: A stator includes a plurality of lead wires extending upward from a coil and a guide member supporting the lead wire above the coil. The guide member is an insulating body. The guide member includes a lower plate, an inner wall, and an upper plate. The lower plate spreads annularly around a central axis. The inner wall extends upward from an inner circumference of the lower plate. The upper plate extends from the inner wall to a radial outside. A single lead wire accommodation space exists on an upper side of the lower plate, a lower side of the upper plate, and a radial outside of the inner wall. The plurality of lead wires are circumferentially disposed along the inner wall in the lead wire accommodation space.
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