公开(公告)号：US20220099177A1

公开(公告)日：2022-03-31

申请号：US17481367

申请日：2021-09-22

Applicant: Nidec Corporation

Inventor： Tsubasa TAMURA ,  Keisuke ASO ,  Shuhei NAKAMATSU

IPC: F16H57/04 ,  F16H57/037 ,  F16H57/031 ,  B60K1/00

Abstract: A bearing device includes a gear portion and a gear housing that houses the gear portion and stores a lubricant therein. The gear housing includes a side plate extending in a direction intersecting the axial direction, a recess recessed from the side plate toward the other side in the axial direction, a saucer opened upward, and a groove including a shaft opening opposing the gear housing and a peripheral opening opened to the recess. The gear portion includes an output shaft rotatably supported by the gear housing via a bearing, and a first gear connected to the output shaft. The saucer includes an opposing surface opposing an outer peripheral surface of the first gear. The groove is inclined downward toward the peripheral opening and reaches the bearing, and the shaft opening of the groove reaches the saucer.

公开(公告)号：US20200300353A1

公开(公告)日：2020-09-24

申请号：US16780909

申请日：2020-02-04

Applicant: NIDEC CORPORATION

Inventor： Yuki ISHIKAWA ,  Shuhei NAKAMATSU

IPC: F16H57/04 ,  B60K17/16 ,  F16H1/20 ,  F16H57/037 ,  F16H48/12

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.

公开(公告)号：US20220268351A1

公开(公告)日：2022-08-25

申请号：US17741409

申请日：2022-05-10

Applicant: NIDEC CORPORATION

Inventor： Yuki ISHIKAWA ,  Shuhei NAKAMATSU

IPC: F16H57/04 ,  B60K17/16 ,  F16H48/12 ,  F16H57/037 ,  F16H1/20

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.

公开(公告)号：US20220173641A1

公开(公告)日：2022-06-02

申请号：US17602370

申请日：2020-04-09

Applicant: Nidec Corporation

Inventor： Shohei FUJIMOTO ,  Shuhei NAKAMATSU ,  Keigo NAKAMURA ,  Keisuke FUKUNAGA

IPC: H02K11/33 ,  H02K5/22 ,  H02K9/19

Abstract: A motor assembly includes a motor with a rotor rotatable about a motor shaft and a stator located radially outside the rotor, an inverter to supply power to the motor, a housing provided with a motor housing space that houses the motor and an inverter housing space that houses the inverter, and a first bus bar that electrically connects the motor and the inverter. The housing includes a partition wall portion that partitions the motor housing space and the inverter housing space and is provided with a through hole penetrating in the axial direction. The first bus bar is connected to a coil wire extending from the stator at an end on one side in the axial direction of the stator in the motor housing space, and extends to the inverter housing space through the through hole.

公开(公告)号：US20220173639A1

公开(公告)日：2022-06-02

申请号：US17436587

申请日：2020-01-10

Applicant: NIDEC CORPORATION

Inventor： Shuhei NAKAMATSU ,  Tsubasa TAMURA ,  Hitoshi KUROYANAGI

IPC: H02K11/33 ,  H02K5/20 ,  H02K5/22 ,  H02K7/116 ,  H02K9/193

Abstract: Provided is a motor unit including: a motor that rotates about a motor axis; a gear unit connected to the motor; an inverter that controls a current to be supplied to the motor; and a housing having a motor housing portion that houses the motor, an inverter housing portion that houses the inverter, and a gear housing portion that houses the gear unit. The inverter housing portion is supported by the motor housing portion and the gear housing portion. The housing includes a housing body that is a single member, the housing body including: a first wall portion that also serves as a side wall of each of the inverter housing portion and the motor housing portion; and a second wall portion that also serves as a side wall of each of the inverter housing portion and the gear housing portion.

公开(公告)号：US20220123628A1

公开(公告)日：2022-04-21

申请号：US17431425

申请日：2020-01-10

Applicant: NIDEC CORPORATION

Inventor： Shuhei NAKAMATSU

IPC: H02K9/19 ,  H02K5/22 ,  H02K7/116 ,  H02K1/32 ,  B60L50/51

Abstract: A motor unit including a motor having a rotor rotatable about a motor axis and a stator radially outside the rotor; a housing having a motor housing portion housing the motor; and a refrigerant channel passing through the interior of the housing. A core back portion of the stator has a plurality of fixing portions projecting radially outward from an outer peripheral surface and extending along an axial direction. An upper fixing portion projecting upward from the outer peripheral surface of the core back portion. The refrigerant channel includes a supply portion for feeding refrigerant to the outer peripheral surface of the core back portion. The supply portion is on a side portion of the upper fixing portion in a circumferential direction. The housing includes a breather portion above the upper fixing portion and allows communication between the interior of the motor housing portion and the outside.

公开(公告)号：US20200266687A1

公开(公告)日：2020-08-20

申请号：US16752694

申请日：2020-01-27

Applicant: NIDEC CORPORATION

Inventor： Shuhei NAKAMATSU

IPC: H02K9/193 ,  H02K5/20 ,  H02K5/24 ,  H02K7/00 ,  H02K7/116 ,  H02K21/14 ,  B60K1/00

Abstract: A motor unit includes a motor including a rotor, a stator radially outside of the rotor; a housing for housing the motor; an oil passage for circulating the oil in the housing space; and a gear portion connected to a shaft of the rotor. The housing includes a motor housing portion defining a motor chamber in an interior, a gear housing portion defining a gear chamber in an interior, and a partition dividing the gear chamber and the motor chamber. The oil passage includes a flow passage arranged in an interior of the housing, and an oil feeding structure on an upper side of the motor to feed the oil to at least one of a stator core or coil ends. The flow passage includes a portion extending along an axial direction to feed the oil to the oil feeding structure. The partition includes the portion of the flow passage.

公开(公告)号：US20190386545A1

公开(公告)日：2019-12-19

申请号：US16479286

申请日：2018-01-06

Applicant: NIDEC CORPORATION

Inventor： Shuhei NAKAMATSU ,  Takayuki MIGITA ,  Hisashi FUJIHARA ,  Masato AONO ,  Takashi SHIRAISHI

IPC: H02K11/215 ,  H02K1/28 ,  H02K5/16

Abstract: A motor includes a magnet rotating together with a rotor about a central axis, a substrate on which a sensor to detect a position of the magnet is installed, a housing to hold a stator to drive the rotor, a bearing assembly including a bearing holder, and a conductor assembly between the housing and the bearing assembly. The conductor assembly includes a conductor including a first conductor electrically connected to the sensor through the substrate and a conductor holder covering the conductor. The substrate is fixed to the conductor holder. In the radial direction, a gap is located between an outer side surface of the bearing holder and an inner side surface of the conductor holder, and at least a portion of the magnet is located in the gap.

公开(公告)号：US20240102556A1

公开(公告)日：2024-03-28

申请号：US18536101

申请日：2023-12-11

Applicant: NIDEC CORPORATION

Inventor： Shuhei NAKAMATSU ,  Shinsuke MIZUKAMI ,  Tsubasa TAMURA ,  Keisuke ASO

IPC: F16H63/34 ,  F16H57/04 ,  H02K9/19

CPC classification number: F16H63/3483 ,  F16H57/0424 ,  F16H57/0476 ,  F16H63/3458 ,  H02K9/19

Abstract: A drive apparatus includes a motor that has a motor shaft extending in an axial direction, a transmission mechanism that is connected on one side in the axial direction of the motor shaft, a lock mechanism that restricts driving of the transmission mechanism, a housing that houses the motor, the transmission mechanism, and the lock mechanism, an oil that is stored in the housing, and an oil passage that circulates the oil. The housing includes a motor room that houses the motor, a gear room that houses the transmission mechanism and the lock mechanism, and a partition that is provided between the motor room and the gear room. The oil passage includes a pump that pumps the oil in the oil passage, a first feed flow passage that feeds the oil to the motor, and a second feed flow passage that feeds the oil to the lock mechanism.

公开(公告)号：US20230090548A1

公开(公告)日：2023-03-23

申请号：US17939963

申请日：2022-09-08

Applicant: NIDEC CORPORATION

Inventor： Yuki ISHIKAWA ,  Shuhei NAKAMATSU ,  Hitoshi KUROYANAGI

IPC: H02K11/33 ,  H02P27/06 ,  H02K5/20 ,  H02K7/116 ,  H02K9/19

Abstract: A drive apparatus includes an inverter accommodated in an inverter housing, a cooling flow path through which a first fluid for cooling the inverter can flow, and a heat exchanger configured to allow a second fluid for cooling a motor to exchange heat with the first fluid. The inverter includes a first element and a second element arranged side by side in a second direction perpendicular to the first direction. The cooling flow path includes a first cooling portion that cools the first element with the first fluid, a second cooling portion that cools the second element with the first fluid, a first connection flow path that connects the first cooling portion and the second cooling portion, and a second connection flow path that connects the second cooling portion and the heat exchanger.