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公开(公告)号：US20220209619A1
公开(公告)日：2022-06-30
申请号：US17560476
申请日：2021-12-23
Applicant: Nidec Corporation
Inventor： Shohei FUJIMOTO , Hibiki TAKADA , Shuhei NAKAMATSU , Keisuke ASO
Abstract: A transmission housing of a drive device is fixed to one side in an axial direction of a motor housing that includes a first housing and a second housing fixed to another side in the axial direction of the first housing. The transmission housing includes a third housing fixed to the first housing and a fourth housing fixed to one side in the axial direction of the third housing. A bolt fixing the first and second housings passes through a through-hole of the second housing from the another side in the axial direction, and is fixed to a bolt hole of the first housing. A bolt fixing the second and third housings passes through a through hole of the first housing from the another side in the axial direction, and is fixed to a bolt hole of the third housing.
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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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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：US20230082913A1
公开(公告)日：2023-03-16
申请号：US17942178
申请日：2022-09-12
Applicant: NIDEC CORPORATION
Inventor： Shuhei NAKAMATSU , Keisuke ASO , Ayumi NAKAGAWA
Abstract: In a drive apparatus, a ring gear of a differential device is rotatable about a third axis in a direction opposite to a counter gear of a deceleration device. The inner surface of the gear housing accommodating the deceleration device, the differential device, and the reservoir capable of storing a fluid includes a first curved surface disposed in the +X direction with respect to the third axis and a second curved surface disposed in the +X direction with respect to the second axis. At least a part of the first curved surface faces the radially outer end portion of the ring gear in the radial direction and extends in the circumferential direction. At least a part of the second curved surface faces the radially outer end portion of the counter gear in the radial direction and extends in the circumferential direction. The position of the reservoir in the Y-axis direction overlaps the first curved surface and the second curved surface.
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公开(公告)号：US20230067898A1
公开(公告)日：2023-03-02
申请号：US17893185
申请日：2022-08-23
Applicant: NIDEC CORPORATION
Inventor： Kentaro OKI , Shuhei NAKAMATSU
Abstract: A motor having a motor shaft rotatable about a motor axis; a power transmission having gears and connected to the motor shaft; a housing having a motor housing portion accommodating the motor and a gear accommodation portion accommodating the power transmission; a fluid contained in the housing; and a fluid channel through which the fluid flows, in which a reservoir storing the fluid above the motor axis is provided in the inside of the gear accommodation portion. The fluid channel includes an external supply channel for supplying the fluid from an outside of the motor to the motor, and an internal supply channel for supplying the fluid to a hollow portion of the motor shaft. The reservoir has a first supply port and a second supply port. The external supply channel is connected to a first supply port. The internal supply channel is connected to a second supply port.
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Patent Agency Ranking
公开(公告)号：US20220149701A1
公开(公告)日：2022-05-12
申请号：US17436584
申请日：2020-01-10
Applicant: NIDEC CORPORATION
Inventor： Shuhei NAKAMATSU , Hitoshi KUROYANAGI , Keisuke FUKUNAGA
Abstract: A motor unit according to an aspect of the present invention includes: a motor having a rotor that rotates about a motor axis and a stator located radially outside the rotor; an inverter that controls a current to be supplied to the motor; a housing body having a motor housing portion that houses the motor and an inverter housing portion that houses the inverter; and an inverter housing configured to cover an opening of the inverter housing portion while supporting the inverter. The housing body is provided with a first cooling path through which a first refrigerant for cooling the motor flows. The inverter housing is provided with a second cooling path through which a second refrigerant for cooling the inverter flows.
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公开(公告)号：US20190181724A1
公开(公告)日：2019-06-13
申请号：US16323906
申请日：2017-08-01
Applicant: Nidec Corporation
Inventor： Shuhei NAKAMATSU , 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, a rotor core surrounding the shaft from radially outside, a plate-shaped end plate at an axial end portion of the rotor core, and a cover portion at the axial end portion of the rotor core with the end plate intervening between the cover portion and the rotor core. The end plate includes a plate through hole extending in an axial direction, a first recessed portion extending radially inward from the plate through hole, and a second recessed portion extending radially outward from the plate through hole. The first recessed portion opens radially inward in the end plate. The first recessed portion includes an axially-facing opening covered with the rotor core. The second recessed portion includes an axially-facing opening including a covered portion covered with the cover portion, and an open portion not covered with the cover portion.
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公开(公告)号：US20230407958A1
公开(公告)日：2023-12-21
申请号：US18461511
申请日：2023-09-06
Applicant: NIDEC CORPORATION
Inventor： Shohei FUJIMOTO , Ayumi NAKAGAWA , Shuhei NAKAMATSU , Yusuke MAKINO
IPC: F16H57/04 , F16H57/021 , F16H57/031
CPC classification number: F16H57/0476 , F16H57/021 , F16H57/031 , F16H57/0424 , F16H57/0441 , F16H57/0423 , F16H57/0471 , F16H57/045 , F16H57/0415 , B60K2001/001
Abstract: In a drive device, a first flow path of a fluid connects a gear accommodation portion and an inlet of a pump. A second flow path connects an outlet of the pump and one end of a third flow path via a cooler. The third flow path is inside a partition wall of a housing and intersects a rotation axis of a first shaft. A fourth flow path connects another end of the third flow path and one end of a fifth flow path. The fifth flow path is inside a gear side lid of the housing. Another end of the fifth flow path is connected to one end of a second shaft in an axial direction. One end of a sixth flow path is connected to another end of the third flow path. Another end of the sixth flow path is inside a housing tubular portion.
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公开(公告)号：US20230102677A1
公开(公告)日：2023-03-30
申请号：US17955547
申请日：2022-09-29
Applicant: NIDEC CORPORATION
Inventor： Hiroki AKAISHI , Kazuyuki YAMAMOTO , Daisuke OGASAWARA , Shuhei NAKAMATSU
Abstract: In an electric power unit including: an electric motor accommodated in a motor accommodating portion formed in a housing; an inverter accommodated in an inverter accommodating portion formed in an upper portion of the housing; and a harness storing portion that is provided in the inverter accommodating portion and protrudes from an end surface of the housing in a motor-axis direction, at least one fastening portion that supports the harness storing portion from below is formed in the harness storing portion, the fastening portion is provided with a seat surface and at least one rib adjacent to the seat surface and connected to a lower surface of the inverter accommodating portion, and the harness storing portion is fastened to the housing by a bolt (fastener) inserted into the seat surface.
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公开(公告)号：US20220196135A1
公开(公告)日：2022-06-23
申请号：US17554088
申请日：2021-12-17
Applicant: Nidec Corporation
Inventor： Tsubasa TAMURA , Shuhei NAKAMATSU , Keisuke ASO
IPC: F16H57/021 , H02K7/116
Abstract: A gear portion of a power transmission device is connected to one side in an axial direction of a first shaft rotatable about a first axis extending along a horizontal direction. The first shaft is supported by a first bearing. The gear portion includes a second shaft rotatable about a second axis below the first axis. A lubricant is provided in a first bearing holding portion of the first bearing. A gear housing that houses the gear portion includes an oil passage below the first bearing. A first end of the oil passage is connected to the first bearing holding portion through the first bearing. A second end of the oil passage is connected to a second bearing holding portion of a second bearing that supports the second shaft through an opening below the first bearing.
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