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公开(公告)号：US10099392B2
公开(公告)日：2018-10-16
申请号：US15221253
申请日：2016-07-27
Applicant: MAKITA CORPORATION
Inventor： Hidekazu Suda , Motohiro Omura
Abstract: Electric scissors comprise a motor, a movable blade, a transmission mechanism, an operation device, an operation signal output device, a control device, a drive circuit, and a forced stop device. The forced stop device is configured to stop the motor when an abnormal state is present in which the value of the operation signal output from the operation signal output device is a value determined in the control device to rotate the motor in a specific rotation direction out of the first and the second rotation directions or to stop the motor, and in which the motor is rotating in a direction opposite to the specific rotation direction.
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公开(公告)号：US11911881B2
公开(公告)日：2024-02-27
申请号：US18140717
申请日：2023-04-28
Applicant: MAKITA CORPORATION
Inventor： Yuta Araki , Motohiro Omura , Akira Ito
IPC: B25B21/00 , B25F5/00 , B25B23/147
CPC classification number: B25B21/008 , B25B23/147 , B25F5/001
Abstract: A rotary tool includes a motor having an axis of rotation extending in a forward-rearward direction of the rotary tool. A grip part is located below the axis of rotation in an up-down direction that is perpendicular to the forward-rearward direction. A planet gear is configured to be driven by the motor. An internal gear meshes with the planet gear and is movable in the forward-rearward direction to change a speed. A sun gear meshes with the planet gear, and an output shaft is configured to be rotationally driven by the sun gear. A sensor is configured to detect the forward-rearward movement of the internal gear, the sensor being disposed downward of the sun gear in the up-down direction.
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公开(公告)号：US09364906B2
公开(公告)日：2016-06-14
申请号：US14155358
申请日：2014-01-15
Applicant: MAKITA CORPORATION
Inventor： Kenji Abe , Masayoshi Okumi , Hidenori Nagasaka , Motohiro Omura , Masaaki Fukumoto , Kenji Shibata , Nobuyasu Furui , Masanori Higashi , Kiyoshi Aoyama
Abstract: A hand-held power tool includes a motor having a stator and a rotor, the motor being configured to rotate the rotor at a speed of at least 40,000 rpm, an output shaft directly driven by the rotor, a tool accessory shaft configured to support a tool accessory, and a two-stage speed reducing transmission operably connecting the output shaft to the tool accessory shaft. The two-stage speed reducing transmission is configured to drive the tool accessory shaft at a rate less than the rotor speed, for example, at a rate less than or equal to 37.5% of the rotor speed.
Abstract translation: 一种手持电动工具包括具有定子和转子的电动机，所述电动机构造成以至少40,000rpm的转速旋转所述转子，由所述转子直接驱动的输出轴;工具附件轴， 工具附件，以及将输出轴与工具附件轴可操作地连接的两级减速传动装置。 两级减速传动装置构造成以小于转子速度的速度驱动工具附件轴，例如以小于或等于转子速度的37.5％的速率。
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公开(公告)号：US11146087B2
公开(公告)日：2021-10-12
申请号：US16884788
申请日：2020-05-27
Applicant: MAKITA CORPORATION
Inventor： Motohiro Omura , Junya Matsushita , Yoshitaka Ichikawa
Abstract: An electric working machine of one aspect of the present disclosure includes a connection port, a control circuit, and/or a power supply switch. The power supply switch is provided on a power supply path extending from a battery pack connected to the connection port to the control circuit. The power supply switch maintains an ON state while a power supply permission signal is output from the battery pack to the electric working machine. The control circuit outputs an ON-command signal to the power supply switch for a specified period of time in response to loss of the power supply permission signal from the battery pack.
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公开(公告)号：US09853586B2
公开(公告)日：2017-12-26
申请号：US14801420
申请日：2015-07-16
Applicant: MAKITA CORPORATION
Inventor： Takuya Kusakawa , Goshi Ishikawa , Motohiro Omura
IPC: H02P27/04 , H02P27/06 , H02P29/024 , H02J7/00
CPC classification number: H02P27/04 , H02J7/0029 , H02J7/0063 , H02P27/06 , H02P29/0241 , H02P29/027
Abstract: A motor driven appliance comprises a battery, a motor, at least one switch, a control unit, an abnormality detection unit, a determination unit, and a processing unit. The at least one switch comprises an operation switch. The control unit controls driving of the motor by controlling power supply from the battery to the motor when the operation switch is turned on. The abnormality detection unit detects abnormality of the appliance. The determination unit determines whether the detected abnormality is a first type abnormality that can be cleared when the operation switch is switched from on to off, or is a second type abnormality that cannot be cleared even if the operation switch is merely switched from on to off. The processing unit is configured to perform a specific process when it is determined that the detected abnormality is the second type abnormality.
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Patent Agency Ranking
公开(公告)号：US10886816B2
公开(公告)日：2021-01-05
申请号：US15874421
申请日：2018-01-18
Applicant: MAKITA CORPORATION
Inventor： Toan Van Doan , Motohiro Omura , Tatsuya Nagahama
IPC: H02K7/08 , H02K7/14 , H02K11/215 , H02K5/16 , H02K21/14 , B25F5/00 , H02K3/52 , B25D17/00 , B25D16/00 , B25F5/02
Abstract: A power tool including a brushless motor having a sensor circuit board has higher durability. The power tool includes a housing, a brushless motor including a rotor having a rotational shaft, a stator, and a sensor circuit board fixed to the stator and having a rotation detecting element that detects rotation of the rotor, and receiving the rotational shaft through the sensor circuit board, and a bearing held in the housing and supporting the rotational shaft. The bearing is located to overlap the rotation detecting element in an axial direction of the rotational shaft.
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公开(公告)号：US09815165B2
公开(公告)日：2017-11-14
申请号：US14597806
申请日：2015-01-15
Applicant: MAKITA CORPORATION
Inventor： Seitaro Hayashi , Goshi Ishikawa , Tatsuki Mori , Motohiro Omura , Tatsuya Yoshizaki
Abstract: A motor driven appliance in one aspect of embodiments of the present disclosure comprises a light source, a lighting unit, a motor, an operation unit, an operation detector, a reference signal output unit, a determination unit, and a control unit. The operation detector detects that the operation unit is operated, and outputs an operation detection signal that indicates that the operation unit is operated. The reference signal output unit outputs at least one reference signal that can be used as a reference for determining whether the detection by the operation detector is normal. The determination unit determines whether the operation unit is actually operated based on the operation detection signal and the at least one reference signal. The control unit controls operation of the lighting unit based on the determination made by the determination unit.
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公开(公告)号：US09287810B2
公开(公告)日：2016-03-15
申请号：US14155691
申请日：2014-01-15
Applicant: MAKITA CORPORATION
Inventor： Motohiro Omura
Abstract: In a motor control circuit, a switching element such as an FET for controlling a motor current and a current detection element for detecting the motor current are connected in series. One terminal of a temperature detection element is electrically connected to an electrical connecting section between the FET and the current detection element, and the other terminal of the temperature detection element is electrically connected to a temperature detection circuit.
Abstract translation: 在电动机控制电路中，串联连接有用于控制电动机电流的开关元件和用于检测电动机电流的电流检测元件。 温度检测元件的一个端子电连接到FET和电流检测元件之间的电连接部分，并且温度检测元件的另一个端子电连接到温度检测电路。
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9.发明授权Power tool having a brushless motor and a control unit for controlling the brushless motor 有权具有无刷电动机的电动工具和用于控制无刷电动机的控制单元公开(公告)号：US09276509B2
公开(公告)日：2016-03-01
申请号：US14165711
申请日：2014-01-28
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato , Motohiro Omura
Abstract: A power tool according to one aspect of one embodiment described in the disclosure includes a brushless motor, a battery voltage detection unit configured to detect a voltage of a battery that provides energy for driving the brushless motor, a rotational position detection unit configured to detect a rotational position of the brushless motor, and a control unit configured to control a drive output supplied to the brushless motor based at least in part on a signal from the rotational position detection unit. The control unit controls a current conduction angle and/or an advance angle supplied to the brushless motor so that, during control of the drive output to the brushless motor, a rotational speed or a conducting current of the brushless motor approaches or reaches a target value, the target value being based at least in part on a battery voltage detected by the battery voltage detection unit.
Abstract translation: 根据本公开所述的一个实施方式的电动工具，具有：无刷电动机，电池电压检测部，被配置为检测提供用于驱动无刷电动机的能量的电池的电压;旋转位置检测部， 无刷电动机的旋转位置，以及控制单元，被配置为至少部分地基于来自旋转位置检测单元的信号来控制提供给无刷电动机的驱动输出。 控制单元控制提供给无刷电动机的电流导通角和/或提前角，使得在对无刷电动机的驱动输出的控制期间，无刷电动机的转速或导通电流接近或达到目标值 目标值至少部分地基于由电池电压检测单元检测到的电池电压。
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公开(公告)号：US09190947B2
公开(公告)日：2015-11-17
申请号：US13760435
申请日：2013-02-06
Applicant: MAKITA CORPORATION
Inventor： Kenya Yanagihara , Yoshitaka Ichikawa , Motohiro Omura , Yutaka Matsunaga
Abstract: An electric power tool according to the present invention is provided with a tool main body, an induction motor, a power supply unit, and an inverter. The power supply unit and the inverter are integrally incorporated in the tool main body together with the induction motor.
Abstract translation: 根据本发明的电动工具设置有工具主体，感应电动机，电源单元和逆变器。 电源单元和逆变器与感应电动机一体地并入工具主体。
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