公开(公告)号：US11137061B2

公开(公告)日：2021-10-05

申请号：US16323929

申请日：2017-08-08

Applicant: Nidec Corporation

Inventor： Yuki Ishikawa ,  Yasuo Yamaguchi ,  Takayuki Migita

IPC: F16H57/04 ,  H02K7/116 ,  H02K9/19 ,  F16H63/34 ,  B60K1/00

Abstract: A motor unit includes a motor including a rotor, a reduction gear including an intermediate gear to rotate about an intermediate axis, a differential including a ring gear arranged to rotate about a differential axis, a housing, oil in a vertically lower region of a housing space, and an oil passage to feed the oil to the motor. At least a portion of the ring gear is lower than a liquid surface of the oil in the vertically lower region of the housing space. A motor axis, the intermediate axis, and the differential axis to extend in parallel with one another in a horizontal direction. Each of the intermediate axis and the differential axis is lower than the motor axis. A line segment imaginarily joining the motor axis and the intermediate axis, a line segment imaginarily joining the intermediate axis and the differential axis, and a line segment imaginarily joining the motor axis and the differential axis when viewed in an axial direction of the motor axis are defined as first, second, and third line segments, respectively. The first line segment extends substantially along a vertical direction. The second line segment extends substantially along a horizontal direction.

公开(公告)号：US11079004B2

公开(公告)日：2021-08-03

申请号：US16902274

申请日：2020-06-16

Applicant: NIDEC CORPORATION

Inventor： Yuki Ishikawa ,  Keigo Nakamura

IPC: F16H57/03 ,  F16H57/021 ,  F16H57/025 ,  B60K17/04

Abstract: A drive apparatus includes a motor, a transmission system, and a housing having a motor housing accommodating the motor and a gear housing accommodating the transmission system. The transmission system includes a first gear supported by a first bearing and a second gear supported by a second bearing. The gear housing includes first and second holding portions holding the first and second bearings. Surrounding ribs project from a wall surface of the gear housing, and surround an area that encompasses the first and second bearings when viewed in an axial direction. The surrounding ribs include arc-shaped ribs along outer circumferential edges of the first and second bearings, and straight ribs connected to the arc-shaped ribs. One or more of the straight ribs are each located on a common tangent to the first bearing and the second bearing.

公开(公告)号：US10958137B2

公开(公告)日：2021-03-23

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 ,  F01P3/00

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.

公开(公告)号：US10862365B2

公开(公告)日：2020-12-08

申请号：US16323930

申请日：2017-08-07

Applicant: Nidec Corporation

Inventor： Yasuo Yamaguchi ,  Takayuki Migita ,  Yuki Ishikawa

IPC: H02K9/19 ,  H02K5/20

Abstract: A motor unit includes a motor, 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 lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage includes a cooler to cool the oil therein.

公开(公告)号：US11894751B2

公开(公告)日：2024-02-06

申请号：US17688113

申请日：2022-03-07

Applicant: NIDEC CORPORATION

Inventor： Keisuke Nakata ,  Yuki Ishikawa ,  Kouhei Oba

IPC: H02K5/20 ,  H02K5/173 ,  H02K9/193 ,  H02K7/08 ,  B60K1/00 ,  B60K1/04

CPC classification number: H02K5/203 ,  H02K5/1732 ,  H02K7/083 ,  H02K9/193 ,  B60K1/04 ,  B60K2001/006

Abstract: A housing of a drive device includes a refrigerant flow path through which a refrigerant flows. The refrigerant flow path includes a first flow path, a second flow path, a third flow path, and a fourth flow path. The refrigerant to be sent from a pump flows through the first flow path. The refrigerant to be supplied to the motor portion flows in the second flow path. The third flow path supplies a part of the refrigerant flowing through the second flow path to the outer surface of a stator. The fourth flow path supplies the other part of the refrigerant flowing through the second flow path to a hollow portion of a shaft. A minimum flow-path cross-sectional area in the fourth flow path is smaller than a minimum flow-path cross-sectional area in the third flow path.

公开(公告)号：US11876433B2

公开(公告)日：2024-01-16

申请号：US17519820

申请日：2021-11-05

Applicant: Nidec Corporation

Inventor： Yuki Ishikawa ,  Hitoshi Kuroyanagi ,  Naohiro Wada

IPC: H02K9/19 ,  B60L50/51 ,  H02K1/20 ,  H02K1/32

CPC classification number: H02K9/19 ,  B60L50/51 ,  H02K1/20 ,  H02K1/32 ,  B60L2210/40 ,  B60L2240/425

Abstract: A housing of a drive device includes a tubular portion, a side plate portion, a plate portion, and a peripheral wall portion. The tubular portion extends in a first direction and accommodates a motor. The side plate portion has a plate shape intersecting the first direction, and is at one end portion of the tubular portion in the first direction. The plate portion expands from the tubular portion along one of the first direction and a second direction perpendicular to the first direction. The peripheral wall portion surrounds an inverter accommodation portion that accommodates inverter when viewed from a third direction perpendicular to the first direction and the second direction, and is connected to the plate portion. Each of a pump and an oil cooler is at any of one end portion of the peripheral wall portion in the second direction, another end portion of the plate portion in the third direction, and another end portion of the side plate portion in the first direction.

公开(公告)号：US11777364B2

公开(公告)日：2023-10-03

申请号：US17519819

申请日：2021-11-05

Applicant: Nidec Corporation

Inventor： Yuki Ishikawa ,  Hitoshi Kuroyanagi ,  Naohiro Wada

IPC: H02K5/20 ,  B60L53/22 ,  F16H57/02 ,  F16H57/04 ,  H02K11/33 ,  H02K21/16 ,  H02K7/116 ,  H02K9/193 ,  B60K1/00

CPC classification number: H02K5/203 ,  B60L53/22 ,  F16H57/02 ,  F16H57/043 ,  F16H57/0417 ,  F16H57/0424 ,  F16H57/0436 ,  F16H57/0476 ,  H02K7/116 ,  H02K9/193 ,  H02K11/33 ,  H02K21/16 ,  B60K2001/001 ,  F16H2057/02034 ,  F16H2057/02052

Abstract: A gear portion of a drive device is connected to a motor shaft. An oil passage through which oil to cool a motor flows includes a first oil passage, a second oil passage, a third oil passage, and a fourth oil passage. The first oil passage connects a gear accommodation portion and a pump accommodation portion. The second oil passage connects the pump accommodation portion and an oil cooler. The third oil passage connects the oil cooler and the fourth oil passage. The fourth oil passage connects the third oil passage and a motor accommodation portion. Each of the first oil passage, the second oil passage, and the third oil passage is in a first housing portion. The fourth oil passage is in a third housing portion.

公开(公告)号：US11715987B2

公开(公告)日：2023-08-01

申请号：US17400114

申请日：2021-08-12

Applicant: NIDEC CORPORATION

Inventor： Yuki Ishikawa ,  Masami Sugino

IPC: H02K5/10 ,  H02K5/173 ,  H02K9/19 ,  H02K5/20

CPC classification number: H02K5/10 ,  H02K5/173 ,  H02K5/20 ,  H02K9/19

Abstract: In a motor, a motor housing includes a motor housing main body having a cylindrical portion and a lid portion holding a first bearing, a cover holding a second bearing, a stator housing forming a radial flow path, first and second seal members, and a positioning portion for radially positioning the motor housing main body and the cover. The stator housing includes a stator housing main body and a flange portion positioned between the motor housing main body and the cover in the axial direction. The first seal member seals a gap in the radial direction between the cylindrical portion and the stator housing main body. The second seal member seals a gap in the axial direction between the motor housing main body and the flange portion. The positioning portion positions the stator housing in the radial direction with respect to the motor housing main body and the cover.

公开(公告)号：US11578798B2

公开(公告)日：2023-02-14

申请号：US17685381

申请日：2022-03-03

Applicant: NIDEC CORPORATION

Inventor： Keisuke Nakata ,  Yuki Ishikawa ,  Sota Doi

IPC: F16H57/04 ,  B60K1/00 ,  F16H57/021 ,  F16H57/02

Abstract: A transmission mechanism device of an aspect of the present invention includes a motor, a transmission mechanism including a plurality of gears, a first shaft and a bearing supporting the first shaft and transmitting power of the motor, a housing that accommodates the transmission mechanism and holds the bearing on an inner face, oil that collects in a lower region inside the housing, a catch tank that is disposed inside the housing and opens upward, an oil passage through which the oil passes, and an oil pump provided in the oil passage. The oil passage has a first path connecting the oil pump and the catch tank and a scooping path for scooping the oil by rotation of the gear to guide the scooped oil to the catch tank. The catch tank includes a feed portion for supplying the oil to the gear or the bearing.

公开(公告)号：US11515749B2

公开(公告)日：2022-11-29

申请号：US17086513

申请日：2020-11-02

Applicant: Nidec Corporation

Inventor： Yasuo Yamaguchi ,  Takayuki Migita ,  Yuki Ishikawa

IPC: H02K5/20 ,  H02K9/19

Abstract: A motor assembly includes a motor, 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 lead the oil from the vertically lower region of the housing space through the motor to the vertically lower region of the housing space. The oil passage includes a first oil passage extending through an inside of the motor, and a second oil passage extending through an outside of the motor. One of the first oil passage and the second oil passage includes a cooler to cool the oil therein.