公开(公告)号：US20210207598A1

公开(公告)日：2021-07-08

申请号：US16488688

申请日：2018-03-12

Applicant: Nidec Tosok Corporation

Inventor： Takamitsu ETO ,  Yoshiyuki KOBAYASHI ,  Koji HIGUCHI ,  Yutaka HASHIMOTO

IPC: F04C2/10 ,  F04C15/00

Abstract: The pump device includes a motor portion that includes a shaft rotating about a central axis and a pump portion that is driven by a motor portion via the shaft. The pump portion includes a pump rotor that rotates along with the shaft and a pump housing that includes an accommodation portion that accommodates the pump rotor. The pump housing includes a pump body that includes a first bearing portion that supports the shaft and a pump cover with an accommodation portion disposed between the pump cover and the pump body. The pump cover includes a flow path through which oil is discharged and suctioned, and includes a second bearing portion that rotatably supports the shaft and that communicates with the flow path. An end portion of the shaft on one side in the axial direction is disposed at the second bearing portion or inside the flow path.

公开(公告)号：US20220034315A1

公开(公告)日：2022-02-03

申请号：US17290305

申请日：2019-09-20

Applicant: NIDEC TOSOK CORPORATION ,  KYB CORPORATION

Inventor： Koji HIGUCHI ,  Yutaka HASHIMOTO ,  Yoshiyuki MAKI ,  Kohei KUBO

IPC: F04C2/10 ,  F04C11/00 ,  F04C13/00 ,  F04C15/06

Abstract: An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.

公开(公告)号：US20210348620A1

公开(公告)日：2021-11-11

申请号：US17268926

申请日：2019-10-29

Applicant: KYB Corporation ,  NIDEC TOSOK CORPORATION

Inventor： Kohei KUBO ,  Tomoyuki FUJITA ,  Koichiro AKATSUKA ,  Yoshiyuki MAKI ,  Koji HIGUCHI ,  Yutaka HASHIMOTO

IPC: F04D29/043 ,  F04D13/06

Abstract: An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.

公开(公告)号：US20200153368A1

公开(公告)日：2020-05-14

申请号：US16676406

申请日：2019-11-06

Applicant: NIDEC TOSOK CORPORATION

Inventor： Yoshiyuki KOBAYASHI ,  Kazuhiro HOMMA ,  Koji HIGUCHI ,  Yutaka HASHIMOTO

IPC: H02P6/16 ,  F04D13/06 ,  H02K7/00 ,  F01M11/00 ,  H02K5/22

Abstract: Provided is an electric oil pump that does not degrade assembly operability and does not require a complicated configuration. The electric oil pump includes a motor portion that has a motor shaft disposed along a center axis extending in an axial direction; a pump portion that is disposed on one side of the motor portion in the axial direction, is driven by the motor portion via the motor shaft, and suctions and ejects an oil, and an inverter portion that is disposed on one side of the pump portion in the axial direction and drives the motor portion, the motor shaft penetrates through the pump portion, and the electric oil pump further includes a rotation angle sensor that is disposed at the inverter portion and detects a rotation angle of the motor shaft.

公开(公告)号：US20190032656A1

公开(公告)日：2019-01-31

申请号：US16048376

申请日：2018-07-30

Applicant: NIDEC TOSOK CORPORATION

Inventor： Yoshiyuki KOBAYASHI ,  Koji HIGUCHI ,  Yutaka HASHIMOTO ,  Shigehiro KATAOKA

IPC: F04C15/00 ,  F04C2/10 ,  H02K7/14 ,  H02K5/02 ,  H02K5/173 ,  H02K5/167

Abstract: An electric oil pump includes a motor unit having a shaft and a pump unit which is disposed on a front side of the motor unit, is driven by the shaft, and discharges oil. The motor unit includes a rotor, a stator, and a resin housing in which the rotor and the stator are housed. The pump unit includes a pump rotor provided at the shaft and a pump housing having a housing part in which the pump rotor is housed. The pump housing includes the pump body that is supported by the shaft via a sliding bearing and a pump cover that covers a front side of the pump body. A rear side of the shaft is supported by the resin housing via a rolling bearing and a front side of the shaft that protrudes from the motor unit is supported by a pump body via the sliding bearing.