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公开(公告)号：US12186866B2
公开(公告)日：2025-01-07
申请号：US17624525
申请日：2020-05-27
Inventor： Masanori Nakamoto , Hiroaki Murakami
IPC: B25B23/147 , G05B19/18
Abstract: An electric tool system includes an electric tool and an inspection device. The electric tool includes: a tightening unit configured to tighten a workpiece onto an attaching target by driving force of a drive source; and a sensor configured to measure a tightening torque provided by the tightening unit. The inspection device includes a measuring unit configured to measure tightening force applied from the tightening unit. The electric tool system further includes an association processor configured to associate a first torque measured value with a second torque measured value. The first torque measured value corresponds to a measurement result by the sensor. The second torque measured value corresponds to a measurement result by the measuring unit.
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公开(公告)号：US12070845B2
公开(公告)日：2024-08-27
申请号：US17273705
申请日：2019-06-26
Inventor： Itarü Murui , Hiroaki Murakami , Akiko Honda , Masanori Nakamoto , Mitsumasa Mizuno , Takashi Kusagawa , Masahiro Sato
IPC: B25B23/147 , B25F5/00 , G05B15/02
CPC classification number: B25F5/00 , G05B15/02 , B25B23/147
Abstract: An electric power tool includes: a motor; an output shaft; and a power transmission mechanism that transmits a rotational output of the motor to the output shaft. A motor control unit controls rotation of the motor in accordance with an on operation of the user operation switch performed by a user. A detector detects physical quantity data while the motor is being rotated. A status determination unit determines whether the electric power tool is in a deteriorated status, by using the physical quantity data. A notification interface communicates that the electric power tool is in a deteriorated status while the motor is not being rotated.
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公开(公告)号：US12070839B2
公开(公告)日：2024-08-27
申请号：US18043686
申请日：2021-07-28
Inventor： Masanori Nakamoto , Hiroaki Murakami , Akiko Honda , Kimitaka Ozawa
IPC: B25B23/00 , B25B21/02 , B25B23/147
CPC classification number: B25B23/1475 , B25B21/02
Abstract: An impact rotary tool includes a drive source, an impact force generator, an output shaft, a torque measuring unit, and a torque calculator. The impact force generator is configured to generate impact force in pulse form from power of the drive source. The output shaft is configured to transmit the impact force to a tip tool. The torque measuring unit is configured to measure a torque applied to the output shaft. The torque calculator is configured to, when a torque waveform of the torque measured by the torque measuring unit during one impact includes a plurality of peak values, calculates the tightening torque in accordance with a largest peak value of one or more second or subsequent peak values.
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公开(公告)号：US11890727B2
公开(公告)日：2024-02-06
申请号：US17556488
申请日：2021-12-20
Inventor： Itaru Murui , Hiroaki Murakami , Mitsumasa Mizuno , Akiko Honda , Satoshi Kajiyama
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.
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Patent Agency Ranking
公开(公告)号：US11724371B2
公开(公告)日：2023-08-15
申请号：US17274066
申请日：2019-06-26
Inventor： Itaru Murui , Mitsumasa Mizuno , Hiroaki Murakami , Takashi Kusagawa , Masahiro Sato , Masanori Nakamoto , Akiko Honda
IPC: B25B23/147 , B25F5/02
CPC classification number: B25B23/147 , B25F5/021
Abstract: An electric power tool includes: an output shaft on which a front-end tool is adapted to be mounted; and a power transmission mechanism that transmits a rotational output of a motor to the output shaft. A posture information acquisition unit acquires posture information for identifying a posture of the electric power tool. A torque information acquisition unit acquires torque information indicating a measured value of tightening torque produced by the front-end tool. A transmission unit transmits the posture information, the torque information, and time information related to a time when respective information is acquired to an external apparatus.
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公开(公告)号：US11539272B2
公开(公告)日：2022-12-27
申请号：US16617491
申请日：2018-03-14
Inventor： Hiroaki Murakami , Mitsumasa Mizuno , Akiko Honda
IPC: H02K11/215 , H02K11/22 , B25F5/00 , H02K7/14 , B25B21/02
Abstract: 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.
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公开(公告)号：US11569725B2
公开(公告)日：2023-01-31
申请号：US16647466
申请日：2018-06-15
Inventor： Mitsumasa Mizuno , Itaru Murui , Satoshi Kajiyama , Hiroaki Murakami , Akiko Honda
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.
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公开(公告)号：US11478916B2
公开(公告)日：2022-10-25
申请号：US16617494
申请日：2018-03-14
Inventor： Hiroaki Murakami , Akiko Honda , Mitsumasa Mizuno
Abstract: 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.
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公开(公告)号：US11235445B2
公开(公告)日：2022-02-01
申请号：US16487794
申请日：2017-11-30
Inventor： Itaru Murui , Hiroaki Murakami , Mitsumasa Mizuno , Akiko Honda , Satoshi Kajiyama
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.
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