公开(公告)号：US20230361651A1

公开(公告)日：2023-11-09

申请号：US18224885

申请日：2023-07-21

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA

IPC分类号： H02K7/14 ,  H02K11/33 ,  H02K1/16 ,  H02K1/18 ,  H02K3/34 ,  H02K3/46

CPC分类号： H02K7/145 ,  H02K11/33 ,  H02K1/16 ,  H02K1/18 ,  H02K3/34 ,  H02K3/46 ,  B25F5/00

摘要： In the brushless motor disposed in a hammer drill, while a stator core of a stator is formed by joining a plurality of divided cores divided in a circumferential direction, varnishes are applied over a coil and joining portions between the divided cores.

公开(公告)号：US20230216359A1

公开(公告)日：2023-07-06

申请号：US17924062

申请日：2021-04-16

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA ,  Kei KOUDA

IPC分类号： H02K1/276 ,  H02K1/28 ,  H02K7/14 ,  H02K9/06 ,  H02K11/215 ,  H02K21/16

CPC分类号： H02K1/276 ,  H02K1/28 ,  H02K7/145 ,  H02K9/06 ,  H02K11/215 ,  H02K21/16 ,  B25B21/02

摘要： An electric work machine reduces a decrease in the detection accuracy of rotation of a rotor while avoiding generation of insufficient reluctance torque. The electric work machine includes a brushless motor including a rotor and a stator, and a magnetic sensor. The rotor includes a rotor core and permanent magnets. The magnetic sensor faces a first end of the rotor core to detect rotation of the rotor. The rotor core includes a first core including the first end and first slots, and a second core including second slots. The permanent magnets are received in the corresponding first and second slots. The first core includes a first portion between first slots adjacent in a circumferential direction. The second core includes a second portion between second slots adjacent in the circumferential direction. The first portion has a dimension smaller than a dimension of the second portion in the circumferential direction.

公开(公告)号：US20240128834A1

公开(公告)日：2024-04-18

申请号：US18397480

申请日：2023-12-27

申请人： MAKITA CORPORATION

发明人： Tatsuya NAGAHAMA ,  Junya INUZUKA ,  Takashi MOMOSE

IPC分类号： H02K7/14 ,  B25F5/02 ,  H02K3/28 ,  H02K3/52 ,  H02K5/04 ,  H02K5/22 ,  H02K7/116 ,  H02K11/215 ,  H02K11/27 ,  H02K29/08

CPC分类号： H02K7/145 ,  B25F5/02 ,  H02K3/28 ,  H02K3/522 ,  H02K5/04 ,  H02K5/225 ,  H02K7/116 ,  H02K11/215 ,  H02K11/27 ,  H02K29/08 ,  B25F5/00 ,  H02K2203/03 ,  H02K2203/09

摘要： A power tool includes a housing formed of two half-housings and an end cap. A stator is mounted in the housing, and a rotor including a rotor core and a permanent magnet is mounted in the stator core. A rotary shaft having an axis of rotation extending in a front-rear direction supports the rotor core. Insulators are mounted at front and rear axial ends of the stator core, a planetary gear is mounted forward of the rotor core and a handle extends from the housing. The front insulator includes two recesses, and a first portion of each recess opens radially and a second portion of each recess opens axially rearward. Portions of the stator core cover the recesses, and projections extend from the housing and respectively mate with the recesses.

公开(公告)号：US20220416608A1

公开(公告)日：2022-12-29

申请号：US17747196

申请日：2022-05-18

申请人： MAKITA CORPORATION

发明人： Yusuke ICHIOKA ,  Junya INUZUKA

IPC分类号： H02K3/52 ,  H02K21/22 ,  A01D34/68 ,  A01D34/78

摘要： An electric work machine includes coils formed reliably. The machine includes a stator, a rotor rotatable about a rotation axis, and an output unit drivable by the rotor. The stator includes a stator core including a cylindrical yoke and teeth protruding radially outward from the yoke, an insulator fixed to the stator core, and coils each wound around a corresponding one of the teeth with the insulator in between. The insulator includes a first cover covering a first end face of the yoke in a first axial direction and a rib on the first cover and supporting a wire connecting the coils. The rotor includes a rotor core outside a periphery of the stator and a magnet fixed to the rotor core.

公开(公告)号：US20220416598A1

公开(公告)日：2022-12-29

申请号：US17743741

申请日：2022-05-13

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA

IPC分类号： H02K1/278 ,  H02K7/14 ,  H02K1/28 ,  H02K3/34

摘要： An electric work machine includes magnets appropriately fixed to a rotor core. The electric work machine includes a stator including a stator core, an insulator fixed to the stator core, and a coil attached to the insulator, a rotor rotatable about a rotation axis and including a rotor core, a magnet fixed to the rotor core, and a rotor cup supporting the rotor core and including a core support surface supporting an end face of the rotor core in a first axial direction along the rotation axis and a magnet support surface supporting at least a part of an end face of the magnet in the first axial direction, and an output unit drivable by the rotor.

公开(公告)号：US20230006516A1

公开(公告)日：2023-01-05

申请号：US17824474

申请日：2022-05-25

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA

IPC分类号： H02K11/20 ,  H02K1/16 ,  H02K3/12 ,  H02K7/00 ,  H02K11/30

摘要： A sensor board is downsized. An electric work machine includes a stator, a rotor rotatable about a rotation axis, magnetic sensors, a sensor board supporting the magnetic sensors, and an output unit drivable by the rotor. The stator includes a stator core, an insulator, and coils including first-, second-, and third-phase coils. The rotor includes a rotor core and magnets fixed to the rotor core. The magnetic sensors detect the magnets and include, in a circumferential direction, a first magnetic sensor aligned with at least a portion of a first coil pair, a second magnetic sensor aligned with at least a portion of a second coil pair, and a third magnetic sensor aligned with at least a portion of a third coil pair.

公开(公告)号：US20220416625A1

公开(公告)日：2022-12-29

申请号：US17743768

申请日：2022-05-13

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA ,  Yusuke ICHIOKA

IPC分类号： H02K11/215 ,  H02K21/22 ,  A01D34/68 ,  A01D34/78

摘要： An electric work machine can appropriately detect rotation of a rotor. The electric work machine includes a stator including a stator core, an insulator fixed to the stator core, and a coil attached to the insulator, a rotor rotatable about a rotation axis and including a rotor core and a magnet fixed to the rotor core, a stator base supporting the stator, a sensor board supported by the stator base and including a magnetic sensor that detects the magnet, and an output unit drivable by the rotor.

公开(公告)号：US20220224173A1

公开(公告)日：2022-07-14

申请号：US17704141

申请日：2022-03-25

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA

IPC分类号： H02K1/16 ,  H02K11/33 ,  B25F5/00 ,  H02K1/18 ,  H02K3/34 ,  H02K3/46

摘要： In the brushless motor disposed in a hammer drill, while a stator core of a stator is formed by joining a plurality of divided cores divided in a circumferential direction, varnishes are applied over a coil and joining portions between the divided cores.

公开(公告)号：US20200381964A1

公开(公告)日：2020-12-03

申请号：US16998043

申请日：2020-08-20

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA

IPC分类号： H02K1/27 ,  H02K9/06 ,  B25D11/12 ,  B25D16/00 ,  B25F5/02 ,  H02K1/30 ,  H02K7/14

摘要： A rotor has reduced weight. A hammer drill includes a motor including a stator and a rotor rotatable relative to the stator. The rotor includes a rotor core having a first space, and a permanent magnet fixed on the rotor core.

公开(公告)号：US20180358854A1

公开(公告)日：2018-12-13

申请号：US15963568

申请日：2018-04-26

申请人： MAKITA CORPORATION

发明人： Junya INUZUKA

IPC分类号： H02K1/27 ,  H02K7/14 ,  H02K1/30 ,  B25D11/12 ,  B25D16/00 ,  B25F5/02

CPC分类号： H02K1/276 ,  B25D11/12 ,  B25D16/00 ,  B25D2211/068 ,  B25D2250/121 ,  B25D2250/221 ,  B25D2250/265 ,  B25F5/02 ,  H02K1/30 ,  H02K7/145 ,  H02K9/06

摘要： A rotor has reduced weight. A hammer drill includes a motor including a stator and a rotor rotatable relative to the stator. The rotor includes a rotor core having a first space, and a permanent magnet fixed on the rotor core.