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公开(公告)号：US11670993B2
公开(公告)日：2023-06-06
申请号：US17042376
申请日：2019-03-27
Applicant: NIDEC CORPORATION
Inventor： Yuki Ishikawa , Yohei Miyata
Abstract: A motor unit includes a motor having a motor shaft extending along a first direction, an inverter that supplies electric power to the motor, a housing that supports the motor therein, an inverter case that is fixed to one side of the housing in a second direction orthogonal to the first direction and that houses the inverter, and a plurality of bolts that fasten the housing and the inverter case. The plurality of bolts include a first bolt extending along the first direction, a second bolt extending along the second direction, a third bolt extending along a third direction orthogonal to both the first direction and the second direction, and one or more fourth bolts extending in a fourth direction intersecting all of the first direction, the second direction and the third direction.
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公开(公告)号：US11649890B2
公开(公告)日：2023-05-16
申请号：US17741409
申请日：2022-05-10
Applicant: NIDEC CORPORATION
Inventor： Yuki Ishikawa , Shuhei Nakamatsu
CPC classification number: F16H57/0408 , B60K17/16 , F16H1/20 , F16H48/12 , F16H57/037
Abstract: A drive apparatus includes a motor; a reduction gear connected to the motor; a differential connected to the reduction gear, for rotating an axle about a differential axis; a housing including a gear housing portion housing the reduction gear and the differential; and an oil housed in the gear housing portion. The differential includes a gear for rotating about the differential axis. An end portion of the gear is lower than the reduction gear, and is configured to soak in the oil. The housing includes an oil drain hole and an oil feed hole for joining an interior of the housing and a space outside of the housing, a first stopper member removably in the oil drain hole, and a second stopper member removably in the oil feed hole. Each of the oil drain hole and the oil feed hole is in a portion of the gear housing portion.
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公开(公告)号：US11621609B2
公开(公告)日：2023-04-04
申请号：US17697867
申请日：2022-03-17
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：US10910918B2
公开(公告)日：2021-02-02
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：US12273012B2
公开(公告)日：2025-04-08
申请号：US17785049
申请日：2020-11-19
Applicant: NIDEC CORPORATION
Inventor： Yuki Ishikawa , Hitoshi Kuroyanagi , Naohiro Wada , Hironobu Kumagai , Hisashi Fujihara
Abstract: A drive device includes a motor and an inverter. A motor axis is parallel to an output axis. The inverter is located in a second direction orthogonal to a first direction with respect to the motor axis and extends in a third direction orthogonal to the first and second directions. When viewed from the first direction, a virtual straight line passing through the axes extends in the third direction. An inverter housing portion overlaps the axes when viewed from the second direction, and has a boundary wall on the virtual straight line side in the second direction. In the second direction, a distance between the boundary wall and the output axis is smaller than a distance between the boundary wall and the motor axis. A motor side connection portion has a portion closer to the side opposite to the output axis than the motor axis in the third direction.
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Patent Agency Ranking
公开(公告)号：US12126239B2
公开(公告)日：2024-10-22
申请号：US17950100
申请日：2022-09-22
Applicant: NIDEC CORPORATION
Inventor： Daisuke Ogasawara , Yuki Ishikawa , Keisuke Nakata , Jun Murakami , Hiroki Akaishi , Kazuyuki Yamamoto
Abstract: In an electric power unit which accommodates at least an electric motor in a housing, polygonal rib regions in which polygonal ribs are respectively formed are provided on at least two surfaces of an outer peripheral surface of the housing, and the polygonal rib regions are connected by a circumferential rib. Here, a first axial rib and a second axial rib extending parallel to an axial direction are formed on the outer peripheral surface of the housing, and the polygonal rib region is provided in a portion sandwiched between the first axial rib and the second axial rib. Further, the circumferential rib is formed over the entire part of the polygonal rib region in a circumferential direction. Note that the polygonal rib is a honeycomb rib.
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公开(公告)号：US12103372B2
公开(公告)日：2024-10-01
申请号：US17694690
申请日：2022-03-15
Applicant: NIDEC CORPORATION
Inventor： Yuki Ishikawa , Hitoshi Kuroyanagi
CPC classification number: B60K1/00 , H02K9/19 , B60K2001/001 , B60K2001/006
Abstract: In a drive device, a housing includes a motor accommodation portion for accommodating a motor and an inverter accommodation portion for accommodating an inverter unit, the motor accommodation portion includes a tubular portion of a tubular shape extending in a first direction, the inverter accommodation portion includes a peripheral wall portion surrounding the inverter accommodation portion when viewed from a second direction and a plate portion extending from the tubular portion along one side in a direction perpendicular to the first direction and intersecting the second direction and continuous with the peripheral wall portion, and at least one of the pump and the oil cooler is fixed to the plate portion.
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公开(公告)号：US12027933B2
公开(公告)日：2024-07-02
申请号：US17686410
申请日：2022-03-04
Applicant: NIDEC CORPORATION
Inventor： Yuki Ishikawa , Hironobu Kumagai
CPC classification number: H02K3/50 , H02K11/25 , H02K2203/09
Abstract: A motor includes a rotor, a stator, and a bus bar unit disposed on one side in an axial direction of the stator. The stator includes conductor connection bodies and a segment coil. Each connection body includes first and second ends in the axial direction. The bus bar unit includes a neutral point bus bar connected to the first end and phase bus bars connected to the second end. The neutral point bus bar extends along a circumferential direction. The phase bus bar includes a main body extending along the circumferential direction and at least partially overlapping the neutral point bus bar and a connection portion extending from the main body to one side in the axial direction. The first end passes through one side in the axial direction of the neutral point bus bar and is connected to the connection portion.
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公开(公告)号：US11515758B2
公开(公告)日：2022-11-29
申请号：US16772807
申请日：2018-12-20
Applicant: NIDEC CORPORATION
Inventor： Yuki Ishikawa , Takanobu Oyama , Keisuke Fukunaga
Abstract: The motor unit includes: a motor having a motor shaft that rotates around a motor axis extending along a horizontal direction; a gear section connected to the motor shaft on one side of the motor shaft in an axial direction; a housing that houses the motor and the gear section; and an oil contained in the housing. The housing includes a motor housing section that has inside a motor chamber for housing the motor, and a gear housing section that has inside a gear chamber for housing the gear section. The housing is provided with an oil passage along which the oil circulates for cooling the motor. A pump that supplies the oil to the motor is provided in a channel of the oil passage. The pump has a pump motor. A rotation axis of the pump motor is parallel to the motor axis.
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公开(公告)号：US11289980B2
公开(公告)日：2022-03-29
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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