公开(公告)号：US20200251951A1

公开(公告)日：2020-08-06

申请号：US16739070

申请日：2020-01-09

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K5/10 ,  H02K7/00

Abstract: An electric actuator includes a motor and a deceleration mechanism. The motor has a motor case having a first opening end surface. The deceleration mechanism has a deceleration mechanism case having a second opening end surface. The motor case and the deceleration mechanism case are connected via a sealing member. The first opening end surface has a first end surface body part and a first end surface protrusion part. The second opening end surface has a second end surface body part and a second end surface protrusion part. The sealing member has a body part sealing part and a protrusion part sealing part. The protrusion part sealing part has an axial-direction protrusion that faces a side surface of the motor case in the first end surface protrusion part or a side surface of the deceleration mechanism case in the second end surface protrusion part in a circumferential direction.

公开(公告)号：US20200244140A1

公开(公告)日：2020-07-30

申请号：US16747552

申请日：2020-01-21

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K5/22 ,  H02K5/08 ,  H02K5/06

Abstract: An electric actuator includes a motor which has a rotor having a motor shaft extending along a central axis and a stator facing the rotor in a radial direction, a motor case for housing the motor, and a deceleration mechanism coupled to one axial side of the motor shaft. The motor case has a case cylinder portion, a lid for covering, and a plurality of screws. The case cylinder portion has a plurality of screw fixing portions. The lid has a top plate portion, an outer cylinder portion which surrounds the case cylinder portion from a radial outer side, an annular groove portion, and a seal member which seals the opening portion of the case cylinder portion. In the lid, an axial thickness of a region which overlaps the annular groove portion as viewed in the axial direction is larger than an axial thickness of the top plate portion.

公开(公告)号：US20200088267A1

公开(公告)日：2020-03-19

申请号：US16574107

申请日：2019-09-18

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Shuichi KINJO ,  Yutaka UEMATSU

IPC: F16H1/32 ,  H02K7/08 ,  H02K7/116

Abstract: In one aspect of an electric actuator, a motor shaft has an eccentric shaft portion. A speed reducing mechanism has an externally toothed gear coupled to the eccentric shaft portion, an internally toothed gear engaged with the externally toothed gear, an output flange portion located on one side in an axial direction of the externally toothed gear, and a plurality of pillar members having pillar member bodies. The output flange portion has a plurality of through holes disposed along the peripheral direction. The pillar member bodies are inserted into the through holes, and support the externally toothed gear so that the externally toothed gear is capable of swinging around a central axis. The pillar member has a convex portion arranged on an outer peripheral surface of a part of the pillar member body. The convex portion is disposed facing one side peripheral in the axial direction of the edge portion.

公开(公告)号：US20200036255A1

公开(公告)日：2020-01-30

申请号：US16515045

申请日：2019-07-18

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Shuichi KINJO ,  Kazuhiro SAITO

IPC: H02K3/52 ,  H02K1/14 ,  H02K3/38 ,  H02K7/116 ,  H02K11/33

Abstract: The stator of the stator unit has a stator core in an annular shape along a circumferential direction, an insulator attached to the stator core, and coils attached to the stator core via the insulator. The bus bar unit of the stator unit has a bus bar holder for holding the bus bar on one side in an axial direction of the insulator. The bus bar has a terminal part extending closer to the one side in the axial direction than the bus bar holder and a coil connection part connected to a coil lead wire drawn from the coils to the one side in the axial direction. One of the bus bar holder and the insulator has claw parts protruding in the radial direction, and the other of them has a hooking part to which the claw parts are hooked and fixed in the axial direction.

公开(公告)号：US20200021164A1

公开(公告)日：2020-01-16

申请号：US16504318

申请日：2019-07-07

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Toshiaki NAKAMURA

IPC: H02K5/22 ,  G01R33/02 ,  H02K11/215 ,  H02B1/20 ,  H02K29/08

Abstract: The sensor unit (40) includes a case (41) having a bottom surface (41a); a sensor element (42) including a sensor element main body (421) and a power supply terminal (42a); and a power supply bus bar (44) including an inclined part (44d) and a first connection part (44a). An end on one side of the power supply terminal (42a) is electrically connected to the sensor element main body (421). In a state where the power supply terminal (42a) passes through the first connection part (44a), an end on the other side of the power supply terminal (42a) is in contact with the inclined part (44d) and the first connection part (44a) is in contact with the power supply terminal (42a), so that movement of the power supply terminal (42a) in a direction away from the bottom surface (41a) is restricted.

公开(公告)号：US20190173360A1

公开(公告)日：2019-06-06

申请号：US16209972

申请日：2018-12-05

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Toshiaki NAKAMURA ,  Yutaka UEMATSU

IPC: H02K11/215 ,  H02K5/22 ,  H02K7/116

Abstract: An electric actuator is provided. The electric actuator includes a motor, a deceleration mechanism, case, an output part, a first rotation sensor and a holding member that holds the first rotation sensor in the case. The case includes a first recess that is recessed from an inner surface of the case to one side in a first direction and a support surface that faces the other side in the first direction. The first rotation sensor includes a sensor main body which includes a sensor chip and is accommodated in the first recess and a projection that protrudes in a second direction orthogonal to the first direction from the sensor main body. The projection is supported on the support surface from one side in the first direction. The sensor main body is disposed on the other side in the first direction away from the bottom surface of the first recess.

公开(公告)号：US20190024782A1

公开(公告)日：2019-01-24

申请号：US16038574

申请日：2018-07-18

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Tomoka OSAWA ,  Toshiaki NAKAMURA ,  Kenichi OZAWA

IPC: F16H61/00 ,  F15B13/08 ,  F16K1/08

Abstract: A sensor mounting may include an accommodation unit; a sensor case; and a screw member. A flow passage body may include the accommodation unit, and a flow passage opening. The fluid pressure sensor may include a sensor main body, and the sensor case. The sensor case may include a sensing hole. The sensor case may include a columnar portion disposed along a center axis, and a flange portion which protrudes from the columnar portion. The accommodation unit may include a female screw provided in a radially inside surface of the accommodation unit. The screw member may include the screw member may include a hole portion, and a male screw. The screw member may be disposed to be opposed to an upper side of the flange portion.

公开(公告)号：US20220337118A1

公开(公告)日：2022-10-20

申请号：US17721355

申请日：2022-04-15

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Tomoki SATO

IPC: H02K5/173 ,  H02K7/116 ,  H02K11/215 ,  F16H15/50 ,  F16H61/664 ,  F16H37/12

Abstract: One aspect of an electric actuator of the present invention includes: a motor having a motor shaft rotatable about a motor axis; a transmission mechanism coupled to one side in the axial direction of the motor shaft; an output shaft extending in the axial direction of the motor shaft and to which rotation of the motor shaft is transmitted via the transmission mechanism; and a rolling member group including three or more rolling members arranged to surround the motor axis. The motor shaft is a hollow shaft. At least a part of the output shaft is located inside the motor shaft. The motor shaft and the output shaft are supported with each other in the axial direction and the radial direction via the rolling member group.

公开(公告)号：US20210381582A1

公开(公告)日：2021-12-09

申请号：US17340074

申请日：2021-06-06

Applicant: NIDEC TOSOK CORPORATION

Inventor： Hiroshi SHIRAI ,  Tomoki SATO

IPC: F16H1/32 ,  H02K7/00 ,  H02K7/08 ,  H02K7/116 ,  F16H57/02

Abstract: An electric actuator of the disclosure includes a motor, a speed reduction mechanism, and a bearing fixed to a motor shaft having an eccentric axis portion. The speed reduction mechanism has: an externally toothed gear, an internally toothed gear, a facing member arranged facing the externally toothed gear, and column members arranged to protrude from one member of the facing member and the externally toothed gear toward the other member and surround the motor axis. The other member has hole portions arranged to surround the motor axis. The column members are inserted into the hole portions respectively, and support the externally toothed gear to be swingable around the motor axis via an inner side surface of each of the hole portions. At least one of the column members is attached to the one member in a manner of being rotatable around a central axis of the at least one column member.

公开(公告)号：US20200251959A1

公开(公告)日：2020-08-06

申请号：US16740487

申请日：2020-01-13

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K7/116 ,  H02K7/00 ,  H02K7/08 ,  H02K5/22

Abstract: An electric actuator includes a motor including a rotor having a motor shaft extending along a central axis and a stator, a deceleration mechanism connected to the motor shaft, an output shaft, a bearing, and a deceleration mechanism case. The motor shaft includes an eccentric axis part with an eccentric axis as a center. The bearing is fitted on of the eccentric axis part. The deceleration mechanism includes an internal gear in a ring shape; an external gear connected to the eccentric axis part via the bearing and engaging with the internal gear; and an output flange part which transmits rotation of the external gear around the central axis to the output shaft. The deceleration mechanism case includes a plurality of gear supporting parts which support an end surface of the internal gear facing one axial-direction side and which are disposed in a circumferential direction with intervals from one another.