公开(公告)号：US11890727B2

公开(公告)日：2024-02-06

申请号：US17556488

申请日：2021-12-20

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru Murui ,  Hiroaki Murakami ,  Mitsumasa Mizuno ,  Akiko Honda ,  Satoshi Kajiyama

IPC: B25B21/02 ,  B25B23/14

CPC classification number: B25B21/02 ,  B25B23/1405

Abstract: An electric power tool includes: a driving shaft that is rotated by a motor; an output shaft on which a front-end tool is attachable; and a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft, and the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces.

公开(公告)号：US11235445B2

公开(公告)日：2022-02-01

申请号：US16487794

申请日：2017-11-30

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Itaru Murui ,  Hiroaki Murakami ,  Mitsumasa Mizuno ,  Akiko Honda ,  Satoshi Kajiyama

IPC: B25B21/02 ,  B25B23/14

Abstract: An electric power tool includes: a driving shaft that is rotated by a motor; an output shaft on which a front-end tool is attachable; and a torque transmission mechanism that transmits a torque produced by the rotation of the driving shaft to the output shaft. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to a side of the driving shaft and a driven magnet member coupled to a side of the output shaft, and the driving magnet member and the driven magnet member are provided such that respective magnetic surfaces face each other, S-poles and N-poles being alternately arranged on each of the magnetic surfaces.

公开(公告)号：US11569725B2

公开(公告)日：2023-01-31

申请号：US16647466

申请日：2018-06-15

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Mitsumasa Mizuno ,  Itaru Murui ,  Satoshi Kajiyama ,  Hiroaki Murakami ,  Akiko Honda

IPC: B25B21/02 ,  F16D7/02 ,  H02K49/10 ,  B25F5/00 ,  F16D41/10

Abstract: A torque transmission mechanism transmits a torque produced by a rotation of a driving shaft to an output shaft. A clutch mechanism is provided between a motor and the torque transmission mechanism. The torque transmission mechanism includes a magnet coupling including a driving magnet member coupled to the driving shaft side and a driven magnet member coupled to the output shaft side. The driving magnet member and the driven magnet member are arranged such that magnetic surfaces on each of which S-pole magnets and N-pole magnets are alternately arranged face other. The clutch mechanism transmits the torque produced by the rotation of the driving shaft to the driving magnet member but does not transmit a torque the driving magnet member receives from the driven magnet member to the driving shaft.