公开(公告)号：US20220263357A1

公开(公告)日：2022-08-18

申请号：US17624815

申请日：2020-06-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akito NAKAMURA

IPC: H02K1/16 ,  H02K7/14 ,  H02K9/08 ,  H02K5/08

Abstract: A motor includes a stator, a rotor, and a cover. The rotor is disposed inside the stator with a gap left with respect to the stator. The rotor is provided to be rotatable with respect to the stator. The stator includes a plurality of coils, a plurality of teeth, and a coupling portion. Around the plurality of teeth, the plurality of coils are respectively arranged via an insulator. The coupling portion is located closer to the rotor than the plurality of coils. The coupling portion couples at least some adjacent ones of the plurality of teeth. The cover is formed mechanically integrally with the insulator. The cover is disposed to face at least a space inside the coupling portion along a rotational axis X of the rotor. The cover closes the gap.

公开(公告)号：US20220410283A1

公开(公告)日：2022-12-29

申请号：US17766914

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Kota KITAMURA ,  Itaru MURUI ,  Naoki TSUJIMOTO ,  Kotaro MOMOEDA ,  Akito NAKAMURA

IPC: B23B45/02 ,  B25F5/00

Abstract: An electric tool includes a pressure-sensitive sensor, a support, an output shaft, and a controller. The pressure-sensitive sensor is configured to sense pressing force which is externally provided. The support supports the pressure-sensitive sensor. The output shaft is configured to hold a tip tool and be rotated relative to the support by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with an output according to the pressing force, the output being output from the pressure-sensitive sensor.

公开(公告)号：US20220247261A1

公开(公告)日：2022-08-04

申请号：US17624715

申请日：2020-06-26

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akito NAKAMURA

IPC: H02K5/173 ,  H02K3/52 ,  H02K7/08 ,  H02K7/14 ,  H02K21/16

Abstract: A motor includes a stator, a rotor, and a bearing holder. The rotor is disposed inside the stator. The rotor rotates with respect to the stator. The bearing holder holds a bearing of the rotor. The stator includes a plurality of coils, a plurality of teeth, and a coupling portion. Around the plurality of teeth, the plurality of coils are respectively arranged via an insulator. The coupling portion is located closer to the rotor than the plurality of coils are. The coupling portion couples at least some adjacent ones of the plurality of teeth. The bearing holder is positioned within a plane intersecting at right angles with a rotational axis of the rotor by coming into contact with either respective inner peripheral tips of the plurality of teeth or the coupling portion.

公开(公告)号：US20220123610A1

公开(公告)日：2022-04-21

申请号：US17428198

申请日：2019-11-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Koichiro ESAKA ,  Akito NAKAMURA ,  Kenji OKADA ,  Mitsumasa MIZUNO

IPC: H02K1/18 ,  H02K3/38 ,  H02K3/50 ,  H02K1/17

Abstract: An electric tool includes a motor. The motor includes a stator core and a rotor. The rotor has an output shaft and rotates with respect to the stator core. The stator core includes: an inner cylindrical portion having a circular cylindrical shape; and a plurality of teeth. Inside the inner cylindrical portion, the rotor is arranged. Each of the plurality of teeth includes a body portion and a tip piece. The body portion protrudes outward from the inner cylindrical portion along a radius of the inner cylindrical portion. The tip piece extends, from a tip part of the body portion, in a direction intersecting with a direction in which the body portion protrudes.

公开(公告)号：US20230120149A1

公开(公告)日：2023-04-20

申请号：US17766899

申请日：2020-09-18

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru MURUI ,  Kotaro MOMOEDA ,  Kota KITAMURA ,  Naoki TSUJIMOTO ,  Akito NAKAMURA

IPC: B25B23/147 ,  B25F5/00 ,  B25B21/02

Abstract: An electric tool includes an output shaft and a controller. The output shaft is configured to hold a tip tool and be rotated by motive power provided from an electric motor with the output shaft holding the tip tool. The controller is configured to control rotation of the output shaft in accordance with pressing force in a direction from a tip end of the tip tool toward the output shaft. The electric tool has, as an operation range, a restriction range in which rotation of the output shaft is restricted in a state where the pressing force is less than or equal to a prescribed value.

公开(公告)号：US20230111524A1

公开(公告)日：2023-04-13

申请号：US17908165

申请日：2021-01-25

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akito NAKAMURA

IPC: H02K5/173 ,  H02K3/52 ,  H02K7/08 ,  H02K7/14 ,  H02K9/06 ,  H02K21/16

Abstract: The rotor includes a rotary shaft, a rotor core, and a plurality of permanent magnets. The stator includes a stator core and a plurality of coils. The stator core has a first contact surface. A normal vector to the first contact surface is aligned with a radially inward direction defined for the rotary shaft. A bearing holder (first bearing holder) has a second contact surface in contact with the first contact surface. A normal vector to the second contact surface is aligned with a radially outward direction defined for the rotary shaft. The bearing holder is positioned by bringing the first contact surface into contact with the second contact surface.

公开(公告)号：US20240243623A1

公开(公告)日：2024-07-18

申请号：US18434702

申请日：2024-02-06

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Koichiro ESAKA ,  Akito NAKAMURA ,  Kenji OKADA ,  Mitsumasa MIZUNO

IPC: H02K1/18 ,  H02K1/17 ,  H02K3/38 ,  H02K3/50

CPC classification number: H02K1/187 ,  H02K1/17 ,  H02K3/38 ,  H02K3/50

Abstract: An electric tool includes a motor. The motor includes a stator core and a rotor. The rotor has an output shaft and rotates with respect to the stator core. The stator core includes: an inner cylindrical portion having a circular cylindrical shape; and a plurality of teeth. Inside the inner cylindrical portion, the rotor is arranged. Each of the plurality of teeth includes a body portion and a tip piece. The body portion protrudes outward from the inner cylindrical portion along a radius of the inner cylindrical portion. The tip piece extends, from a tip part of the body portion, in a direction intersecting with a direction in which the body portion protrudes.

公开(公告)号：US20230170768A1

公开(公告)日：2023-06-01

申请号：US17913401

申请日：2021-02-05

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Akito NAKAMURA ,  Kota KITAMURA

IPC: H02K11/33 ,  H02K3/52 ,  H02K7/14

CPC classification number: H02K11/33 ,  H02K3/522 ,  H02K7/145

Abstract: A brushless motor is an inner rotor type brushless motor. The brushless motor includes a plurality of phase coils of multiple phases arranged around a rotation axis, and a plurality of terminals configured to connect the plurality of phase coils of multiple phases to a switching circuit. The plurality of terminals are located inside a circumscribed circle of the plurality of phase coils of multiple phases.

公开(公告)号：US20220131434A1

公开(公告)日：2022-04-28

申请号：US17428922

申请日：2019-11-21

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Mitsumasa MIZUNO ,  Akito NAKAMURA ,  Koichiro ESAKA ,  Kenji OKADA

IPC: H02K1/276 ,  H02K7/14 ,  H02K21/16

Abstract: An electric tool includes a motor. The motor includes a stator core and a rotor. The rotor rotates with respect to the stator core. The rotor includes: a rotor core having a circular cylindrical shape; a plurality of permanent magnets; and an output shaft. The output shaft is held inside the rotor core. The plurality of permanent magnets are arranged as spokes around a center of the rotor core.