公开(公告)号：US20200251956A1

公开(公告)日：2020-08-06

申请号：US16716506

申请日：2019-12-17

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K7/04 ,  H02K7/116 ,  F16H1/32

Abstract: An electric actuator according to an aspect of the disclosure includes: a motor including a rotor having a motor shaft extending along a central axis and a stator facing the rotor in a radial direction; and a deceleration mechanism which is disposed on a side of the stator in an axial direction and connected to the motor shaft. The motor shaft includes an eccentric shaft part with an eccentric axis, which is eccentric with respect to the central axis, as a center, and the eccentric shaft part is connected with the deceleration mechanism. The eccentric shaft part includes a balance concave part disposed on an end part of the eccentric shaft part in a predetermined direction which is in a radial direction from the central axis toward the eccentric axis. The balance concave part is recessed from an outer surface of the eccentric shaft part.

公开(公告)号：US20190207462A1

公开(公告)日：2019-07-04

申请号：US16234529

申请日：2018-12-27

Applicant: NIDEC TOSOK CORPORATION

Inventor： Yutaka UEMATSU ,  Shun KATO ,  Ryunosuke OIKAWA ,  Yuzo AKASAKA ,  Kazumi SHINKAI

IPC: H02K3/50 ,  H02K5/08 ,  H02K5/173 ,  H02K5/22 ,  H02K7/08 ,  H02K7/116 ,  H02K11/215 ,  H02K21/14 ,  F16H61/32 ,  F16H61/00 ,  F16H57/02

Abstract: An electric actuator includes: a motor unit; a speed reducer; a circuit board; a busbar; and a housing. The housing has a motor case and a circuit board case attached to one side of the motor case in an axial direction. The circuit board case has a bottom wall blocking an opening of the motor case. The bottom wall has a bottom wall through-hole that penetrates through the bottom wall in the axial direction on an outer side beyond the speed reducer in the radial direction. A busbar has a busbar main body section, a coil line connecting section to which a coil line extending on one side in the axial direction from a coil is connected, and a connection terminal section. The connection terminal section extends to one side of the bottom wall in the axial direction via the bottom wall through-hole and is connected to the circuit board.

公开(公告)号：US20200244132A1

公开(公告)日：2020-07-30

申请号：US16745363

申请日：2020-01-17

Applicant: NIDEC TOSOK CORPORATION

Inventor： Shuichi KINJO ,  Hiroshi SHIRAI ,  Yutaka UEMATSU

IPC: H02K5/10 ,  H02K5/24 ,  H02K7/116

Abstract: An electric actuator includes a motor which has a rotor having a motor shaft and a stator, a motor case for housing the motor, and a deceleration mechanism coupled to the motor shaft. The motor case has a case cylinder portion and a lid. The lid has a top plate portion, an outer cylinder portion, an inner cylinder portion, an annular groove portion, and an annular seal member. An axial length of the outer cylinder portion is larger than an axial length of the inner cylinder portion. An inner diameter of the annular seal member is smaller than an outer diameter of the inner cylinder portion in a state that the annular seal member is removed from the lid. The annular seal member is housed in the annular groove portion in a state of being in contact with an outer peripheral surface of the inner cylinder portion.

公开(公告)号：US20200036266A1

公开(公告)日：2020-01-30

申请号：US16497896

申请日：2018-03-20

Applicant: Nidec Tosok Corporation

Inventor： Yutaka UEMATSU ,  Kazumi SHINKAI ,  Shun KATO ,  Shuichi KINJO ,  Kohei OSUGA ,  Tadayuki HATSUDA

IPC: H02K11/215 ,  H02K7/00 ,  H02K7/116

Abstract: An electric actuator includes a motor portion that includes a motor including a motor shaft extending axially, a decelerator that is joined to one axial side of the motor shaft, and an output portion that includes an output shaft to which rotation of the motor shaft is transmitted via the decelerator. The output shaft includes a joint portion joined to a driven shaft, the output portion includes a sensor magnet and a magnet holder which holds the sensor magnet, and the magnet holder is indirectly joined to the output shaft and is fixed to the driven shaft.

公开(公告)号：US20190207475A1

公开(公告)日：2019-07-04

申请号：US16234602

申请日：2018-12-28

Applicant: NIDEC TOSOK CORPORATION

Inventor： Yutaka UEMATSU ,  Shun KATO ,  Ryunosuke OIKAWA ,  Yuzo AKASAKA ,  Kazumi SHINKAI

IPC: H02K7/116 ,  H02K5/08 ,  H02K5/173 ,  H02K5/22 ,  H02K7/08 ,  H02K11/215 ,  H02K21/14 ,  F16H19/00 ,  F16H57/02

CPC classification number: H02K7/116 ,  F16H1/32 ,  F16H19/001 ,  F16H57/02 ,  F16H61/32 ,  F16H2001/325 ,  F16H2057/02034 ,  H02K5/08 ,  H02K5/1732 ,  H02K5/225 ,  H02K7/083 ,  H02K11/215 ,  H02K21/14 ,  H02K2211/03

Abstract: An electric actuator is provided and includes: a motor unit having a motor shaft extending in an axial direction, a speed reducer connected to one side of the motor shaft in the axial direction, an output section having an output shaft to which rotation of the motor shaft is transmitted via the speed reducer, and a housing accommodating the motor unit, the speed reducer and the output section. The motor shaft and the output shaft are disposed apart from each other in the radial direction of the motor shaft. The motor unit has a first bearing that rotatably supports the motor shaft. The housing has a housing main body formed of resin, and a metal member formed of metal and held by the housing main body. The metal member has a bearing holding section that holds the first bearing, and an output shaft support section that supports the output shaft.

公开(公告)号：US20190207471A1

公开(公告)日：2019-07-04

申请号：US16234487

申请日：2018-12-27

Applicant: NIDEC TOSOK CORPORATION

Inventor： Yutaka UEMATSU ,  Shun KATO ,  Ryunosuke OIKAWA ,  Yuzo AKASAKA ,  Kazumi SHINKAI

IPC: H02K7/116 ,  H02K5/08 ,  H02K5/173 ,  H02K5/22 ,  H02K7/08 ,  H02K11/215 ,  H02K21/14 ,  F16H57/02

Abstract: An electric actuator attached to a vehicle is provided and includes: a motor unit, a speed reducer, a circuit board, an output section, and a housing that accommodates the motor unit, the speed reducer, the circuit board and the output section. The housing has a motor case that opens at one side in an axial direction, and a circuit board case attached to one side of the motor case in the axial direction to close an opening of the motor case and accommodates the circuit board. The motor case has a motor case main body that accommodates the motor unit, and multiple attaching leg sections protruding from the motor case main body and fixed to the vehicle. The attaching leg sections protrude outward from the circuit board case when seen in the axial direction.

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：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.