公开(公告)号：US20200280252A1

公开(公告)日：2020-09-03

申请号：US16647466

申请日：2018-06-15

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Mitsumasa MIZUNO ,  Itaru MURUI ,  Satoshi KAJIYAMA ,  Hiroaki MURAKAMI ,  Akiko HONDA

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

摘要： 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.

公开(公告)号：US20200186008A1

公开(公告)日：2020-06-11

申请号：US16617491

申请日：2018-03-14

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Hiroaki MURAKAMI ,  Mitsumasa MIZUNO ,  Akiko HONDA

IPC分类号： H02K11/215 ,  B25F5/00 ,  H02K7/14 ,  H02K11/22

摘要： A motor retainer is provided on an inner circumferential surface of a housing and retains an outer circumference of a motor unit. A rotation detector includes a rotating body attached to a motor shaft and a position detector that outputs a rotational position signal corresponding to a rotational position of the rotating body. A sensor substrate retainer is provided on the inner circumferential surface of the housing and retains the position detector at a position facing the rotating body.

公开(公告)号：US20200180131A1

公开(公告)日：2020-06-11

申请号：US16617494

申请日：2018-03-14

申请人： Panasonic Intellectual Property Management Co., Ltd.

发明人： Hiroaki MURAKAMI ,  Akiko HONDA ,  Mitsumasa MIZUNO

IPC分类号： B25F5/00 ,  H02K7/14

摘要： An electric power tool includes: a motor unit including a motor; a driving block for transmitting a rotational output of the motor to a front-end tool; and a rotation detector that detects an angle of rotation of the motor. The rotation detector includes a rotating body attached to a motor shaft and a position detector that outputs a rotational position signal corresponding to a rotational position of the rotating body. The rotating body includes an opening, and the motor shaft is press fitted and fixed to the opening of the rotating body.