公开(公告)号：US20170047818A1

公开(公告)日：2017-02-16

申请号：US15304653

申请日：2015-04-22

Applicant: NSK Ltd.

Inventor： Kazunori KOIZUMI ,  Kenichi FUKUYAMA ,  Hayao WATANABE

IPC: H02K7/14 ,  H02K24/00 ,  H02K5/16 ,  H02K7/08 ,  H02K11/21

CPC classification number: H02K7/14 ,  F16C19/06 ,  F16C25/083 ,  F16C35/067 ,  F16C2380/26 ,  H02K1/2786 ,  H02K5/16 ,  H02K5/1735 ,  H02K7/08 ,  H02K7/085 ,  H02K11/21 ,  H02K11/215 ,  H02K24/00 ,  H02K29/06

Abstract: A direct drive motor includes: a motor unit including a stator and a rotor rotatable with respect to the stator; a housing including a first housing to which the stator is fixed and a second housing to which the rotor is fixed; a bearing that rotatably supports the second housing with respect to the first housing; and a rotation detector that detects a rotating state of the motor unit. The rotation detector is a single incremental-type resolver that detects a relative displacement of the rotor with respect to the stator.

Abstract translation: 直接驱动马达包括：马达单元，其包括定子和可相对于定子旋转的转子; 壳体，其包括固定有定子的第一壳体和固定有转子的第二壳体; 相对于第一壳体可转动地支撑第二壳体的轴承; 以及检测电动机单元的旋转状态的旋转检测器。 旋转检测器是检测转子相对于定子的相对位移的单个增量式分解器。

公开(公告)号：US20230037848A1

公开(公告)日：2023-02-09

申请号：US17786957

申请日：2021-01-26

Applicant: NSK LTD.

Inventor： Toshifumi TAGUCHI ,  Hayao WATANABE ,  Masayuki MARUYAMA ,  Kenichi FUKUYAMA

IPC: H02K24/00 ,  H02K1/02 ,  H02K5/173 ,  H02K7/08 ,  H02K11/225 ,  H02K11/33 ,  H02K21/16 ,  G05B15/02

Abstract: A motor includes a housing including a housing base and a housing shaft portion that is provided on the housing base and extends in a direction along a rotation center axis, a motor stator that is disposed outward in a radial direction of the housing shaft portion, a motor rotor that is provided between the motor stator and the housing shaft portion, a bearing that is provided inward in a radial direction of the motor rotor and rotatably supports the motor rotor to the housing shaft portion, a sealing structure that is provided on an opposite side to the housing base in an axial direction of the motor rotor and seals between the motor rotor and the housing shaft portion, and a resolver that is configured to detect rotation of the motor rotor.

公开(公告)号：US20170331343A1

公开(公告)日：2017-11-16

申请号：US15536418

申请日：2015-12-24

Applicant: NSK LTD.

Inventor： Hideya HIGUCHI ,  Tsuyoshi NAKAMURA ,  Hayao WATANABE

IPC: H02K5/10 ,  F16C35/067 ,  F16C35/07 ,  H02K9/24 ,  H02K5/20 ,  H02K5/173

CPC classification number: H02K5/10 ,  F16C35/067 ,  F16C35/07 ,  H02K5/04 ,  H02K5/1732 ,  H02K5/1737 ,  H02K5/20 ,  H02K7/086 ,  H02K7/088 ,  H02K9/24 ,  H02K21/22 ,  H02K2205/09 ,  H02K2213/03

Abstract: Provided is a motor capable of more reliably preventing dust generated therein from flowing to the outside. A motor includes a stator, a rotor, a rotor housing which rotates along with the rotor, a stator housing which fixes the stator thereto, includes spaces formed with respect to the rotor housing, and overlaps the rotor housing with first gaps interposed therebetween in the entire circumferential direction, annular members which overlap the stator housing with second gaps interposed therebetween in the entire circumferential direction inside the spaces, exhaust holes which suck and discharge air inside the spaces through the second gaps, and exhaust grooves.

公开(公告)号：US20210391767A1

公开(公告)日：2021-12-16

申请号：US17283782

申请日：2019-09-26

Applicant: NSK LTD.

Inventor： Kazunori KOIZUMI ,  Hayao WATANABE

IPC: H02K7/06 ,  H02K5/173 ,  H02K7/00 ,  H02K16/00

Abstract: An actuator includes: a first motor including a first stator and a first rotor; a second motor and including a second stator and a second rotor; a shaft member penetrating through the first rotor and the second rotor, and including a first part protruding from the first rotor toward an opposite side to the second rotor and including a spline groove, and a second part protruding from the second rotor toward an opposite side to the first rotor and including a male screw portion; a spline outer cylinder engaging with the spline groove to guide the shaft member and configured to rotate together with the first rotor to enable the shaft member to rotate; and a nut member provided with a female screw portion engaging with the male screw portion of the shaft member, and configured to rotate together with the second rotor to enable the shaft member to move.

公开(公告)号：US20190190353A1

公开(公告)日：2019-06-20

申请号：US16318877

申请日：2017-07-18

Applicant: NSK LTD.

Inventor： Kazunori KOIZUMI ,  Hayao WATANABE

IPC: H02K11/22 ,  H02K7/00 ,  H02K7/08 ,  H02K16/00 ,  H02K21/12 ,  H02K24/00

Abstract: A dual shaft integrated motor includes an inner rotor and an outer rotor that are independently rotatable and rotate in an identical pivotal direction. The inner rotor, an inner stator, an outer stator, and the outer rotor are sequentially arranged from a pivot in a radial direction. The inner stator and the outer stator interpose a non-magnetic body therebetween, the non-magnetic body being provided at a position contiguous with the inner stator and the outer stator along a circumferential direction centering on the pivot.

公开(公告)号：US20190068035A1

公开(公告)日：2019-02-28

申请号：US16074845

申请日：2017-07-18

Applicant: NSK Ltd.

Inventor： Kazunori KOIZUMI ,  Hayao WATANABE

IPC: H02K16/02 ,  H02K7/00 ,  H02K7/08 ,  H02K11/21

CPC classification number: H02K16/02 ,  H02K1/141 ,  H02K7/003 ,  H02K7/085 ,  H02K7/088 ,  H02K11/022 ,  H02K11/21 ,  H02K11/225 ,  H02K16/00 ,  H02K21/12 ,  H02K21/14 ,  H02K21/22 ,  H02K24/00

Abstract: A dual shaft integrated motor including inner and outer rotors independently rotatable and rotating in an identical pivotal direction, the inner and outer rotors each having an output shaft positioned on one end of the pivotal direction, the dual shaft integrated motor includes: a detection unit including a first detection unit detecting a rotation angle of the inner rotor, and a second detection unit detecting a rotation angle of the outer rotor; a bearing unit including a first bearing rotating in conjunction with the inner rotor, and a second bearing rotating in conjunction with the outer rotor; a stator core unit including a first core serving as a stator core of the inner rotor, and a second core serving as a stator core of the outer rotor; and a base to which the detection unit, the bearing unit, and the stator core unit are sequentially attached from the one end.

公开(公告)号：US20160301270A1

公开(公告)日：2016-10-13

申请号：US15100382

申请日：2015-01-05

Applicant: NSK LTD.

Inventor： Yusuke OTA ,  Hayao WATANABE ,  Shigeru ENDOU

IPC: H02K1/27 ,  H02K21/16 ,  H02K1/14

CPC classification number: H02K1/278 ,  H02K1/08 ,  H02K1/146 ,  H02K1/276 ,  H02K21/16 ,  H02K29/03 ,  H02K2201/03 ,  H02K2213/03

Abstract: To provide a motor core and a motor capable of reducing cogging torque and torque ripple by the shape of a pole tooth of a stator. An end surface of a pole tooth of a stator is formed such that a cross-section of the end surface along a circumferential direction is a curved surface having an arc shape that protrudes in a direction opposite to a direction in which an end surface of a magnet of a rotor (equivalent to an outer periphery of a rotor yoke part), which is opposed to the end surface, protrudes.

Abstract translation: 提供一种能够通过定子的极齿的形状减少齿槽转矩和转矩脉动的电动机芯和电动机。 定子的极齿的端面形成为使得沿着圆周方向的端面的横截面是具有弧形的弯曲表面，该弧形表面沿与方向的端面的方向相反的方向突出 与端面相对的转子的磁体（相当于转子磁轭部的外周）突出。

公开(公告)号：US20180367018A1

公开(公告)日：2018-12-20

申请号：US16061785

申请日：2017-07-18

Applicant: NSK Ltd.

Inventor： Kazunori KOIZUMI ,  Hayao WATANABE

IPC: H02K21/16

CPC classification number: H02K21/16 ,  H02K1/12 ,  H02K1/16 ,  H02K1/2706 ,  H02K15/02

Abstract: An electric motor includes: a rotor having a rotor yoke and a magnet; and a stator formed by stacking, in a rotation axis direction of the rotor, a plurality of electromagnetic steel sheet layers in each of which a plurality of electromagnetic steel sheets each having two teeth is annularly arranged. A core of a coil provided in the stator is formed of the teeth stacked in the rotation axis direction, there are two types of phases for arrangement of a plurality of electromagnetic steel sheets in one electromagnetic steel sheet layer, and the stator includes the electromagnetic steel sheet layers having the two types of phases.

公开(公告)号：US20160118855A1

公开(公告)日：2016-04-28

申请号：US14892442

申请日：2014-05-07

Applicant: NSK LTD.

Inventor： Masayuki MARUYAMA ,  Yusuke OTA ,  Kazunori KOIZUMI ,  Hayao WATANABE ,  Toshinori SATOU

IPC: H02K5/10 ,  H02K11/225

CPC classification number: H02K5/10 ,  H02K11/225 ,  H02K2205/09

Abstract: Provided are a motor having a small number of parts and provided with waterproof performance in a low-cost method, and a positioning device and a conveyance device that are positioned and driven by the motor. The motor includes a columnar motor body that is formed with a center hole penetrating in an axial direction, and a housing for accommodating the motor body. The housing includes a cylindrical part that covers an outer peripheral surface of the motor body; a rotation output part provided on an upper side of the cylindrical part in the axial direction and fixed to rotary bodies of the motor body; and a fixed part provided on a lower side of the cylindrical part in the axial direction and fixed to fixed bodies of the motor body. The housing is sealed by a sealing mechanism at only one place of the cylindrical part in the axial direction.

Abstract translation: 本发明提供一种具有少量部件并以低成本方法提供防水性能的电动机，以及由电动机定位和驱动的定位装置和输送装置。 电动机包括形成有沿轴向贯通的中心孔的柱状电动机主体和容纳电动机主体的壳体。 壳体包括覆盖电动机主体的外周面的圆筒部; 旋转输出部，其设置在所述筒状部的轴向上侧上并固定于所述电动机主体的旋转体; 以及固定部，其设置在所述圆筒部的轴向的下侧，并固定到所述电动机主体的固定体。 壳体通过密封机构在轴向方向上仅在圆柱形部分的一个位置处密封。