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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
申请人： MAKITA CORPORATION
摘要： 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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12.发明授权公开(公告)号：US10780563B2
公开(公告)日：2020-09-22
申请号：US15724766
申请日：2017-10-04
申请人： MAKITA CORPORATION
摘要： An electric power tool according to one aspect of the present disclosure includes a main body, a motor, a tool holder configured to hold a tool bit, a hammer, a motion converter, a rotation transmitter, a first load detector, a second load detector, and a motor controller. The first load detector detects, based on information indicating a drive state of the motor, a load imposed from a work piece to the tool bit. The second load detector detects, based on information indicating a behavior of the main body, a load imposed from the work piece to the tool bit. The motor controller sets an upper limit of rotational speed of the motor to a predetermined no-load rotational speed in response to no-load on the tool bit being detected by both the first load detector and the second load detector.
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公开(公告)号：US10592151B2
公开(公告)日：2020-03-17
申请号：US15244130
申请日：2016-08-23
申请人： MAKITA CORPORATION
IPC分类号： G06F3/06 , G06F12/0868 , B25C1/08 , B25F5/00 , G05B19/042
摘要： A work apparatus in one aspect of the present disclosure comprises a control unit, a volatile memory and a rewritable non-volatile memory. The control unit comprises an update processing unit and a writing processing unit. The writing processing unit writes history information in the volatile memory into the non-volatile memory when the writing processing unit predicts a suspension of supply of an electric power to the control unit.
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公开(公告)号：US10322498B2
公开(公告)日：2019-06-18
申请号：US14885448
申请日：2015-10-16
申请人： MAKITA CORPORATION
摘要： An electric power tool in one aspect of the present disclosure comprises a motor, a hitting mechanism, a hitting detector, and a control unit. The control unit is configured to set a control amount of the motor so that the motor rotates at a lower speed than a speed in the target rotation state during an initial driving period, and switch the control amount to a final control amount corresponding to the target rotation state when the initial driving period elapses. The initial driving period is a period from when generation of a hitting force is detected by the hitting detector until a predetermined first time period elapses, after the motor is started driven.
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公开(公告)号：US20150217436A1
公开(公告)日：2015-08-06
申请号：US14399647
申请日：2013-05-07
申请人： MAKITA CORPORATION
发明人： Kenya Yanagihara , Ying Yang , Yoshitaka Ichikawa , Yuki Kawai
CPC分类号： B25C1/041 , B25C1/04 , B25C1/06 , Y10T29/49833
摘要： A driving tool, such as a nailer, includes a compression piston slidably disposed within a compression cylinder. An electric motor and a crank mechanism reciprocally drive the compression piston within the compression cylinder, and a sensor directly or indirectly detects the position of the compression piston. Prior to the start of a driving operation, a return operation is performed to move the compression piston to its bottom dead center when the sensor detects that the compression piston is located at a position other its bottom dead center.
摘要翻译： 诸如钉枪的打入工具包括可滑动地设置在压缩缸内的压缩活塞。 电动机和曲柄机构在压缩气缸内往复驱动压缩活塞，传感器直接或间接地检测压缩活塞的位置。 在开始驾驶操作之前，当传感器检测到压缩活塞位于其下死点以外的位置时，执行返回操作以将压缩活塞移动到其下止点。
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公开(公告)号：US12023787B2
公开(公告)日：2024-07-02
申请号：US17145965
申请日：2021-01-11
申请人： MAKITA CORPORATION
IPC分类号： B25B23/147 , B25B21/02 , B25F5/00 , H02P29/024
CPC分类号： B25B23/1475 , B25B21/02 , B25F5/00 , H02P29/024
摘要： An electric powered work machine in one aspect of the present disclosure includes a motor, a tool driver, a command receiver, a diagnosis circuit, and a result transmitter. The diagnosis circuit executes a failure diagnosis of the electric powered work machine in response to the command receiver receiving a diagnosis command signal from a diagnosis device. The result transmitter transmits a diagnosis result signal to the diagnosis device. The diagnosis result signal indicates a result of the failure diagnosis that is executed by the diagnosis circuit.
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公开(公告)号：US11463027B2
公开(公告)日：2022-10-04
申请号：US17015158
申请日：2020-09-09
申请人： MAKITA CORPORATION
发明人： Yoshitaka Ichikawa
摘要： An electric working machine in one aspect of the present disclosure includes a motor and a controller. The motor is configured to be electrically coupled to a battery pack and to be driven with electric power from the battery pack. The controller is configured to acquire an internal resistance information of the battery pack and to change control of the motor based on the internal resistance information acquired.
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18.发明授权公开(公告)号：US10326385B2
公开(公告)日：2019-06-18
申请号：US15992530
申请日：2018-05-30
申请人： MAKITA CORPORATION
发明人： Yoshitaka Ichikawa
摘要： In one aspect of the present disclosure, an electric working machine includes a three-phase brushless motor, a first switching element, a second switching element, a third switching element, a fourth switching element, a fifth switching element, a sixth switching element, a rotation detector, a brake controller. The brake controller executes a two-phase short-circuit brake. The two-phase short-circuit brake is executed so as to switch any of the fourth switching element, the fifth switching element, and the sixth switching element to a corresponding ON-state or an OFF-state in response a detection signal from the rotation detector that occurs prior to a switching time.
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公开(公告)号：US09553542B2
公开(公告)日：2017-01-24
申请号：US14744721
申请日：2015-06-19
申请人： MAKITA CORPORATION
CPC分类号： H02P29/20 , B23D51/16 , B23D59/001 , B25D11/00 , B25D16/00 , B25D16/006 , B25D2250/201 , B25D2250/221 , H02P7/18
摘要： A hammer drill (100) comprises an electric motor (110), a piston (127) as a driving member and a controller (199) which controls and drives the electric motor (110). The piston (127) is reciprocated by rotation of the electric motor (110) and thereby a hammer bit (119) is driven in its longitudinal direction. The hammer bit (119) is moved forward in response to a forward movement stroke of the piston (127) and thereby a hammering operation is performed by the hammer bit (119). The controller (199) sets a duty ratio of a driving pulse signal which drives the electric motor (110) in the forward movement stroke of the piston (127) to be larger in order to prevent a reduction of a rotation speed of the electric motor (110) due to a load applied on the electric motor (110) during the forward movement stroke of the piston (127).
摘要翻译： 锤钻（100）包括电动机（110），作为驱动构件的活塞（127）和控制和驱动电动机（110）的控制器（199）。 活塞（127）通过电动机（110）的旋转而往复运动，从而使锤头（119）在其长度方向上被驱动。 响应于活塞（127）的向前移动行程，锤钻头（119）向前移动，从而通过锤钻头（119）执行锤击操作。 控制器（199）将活塞（127）的前进行程中驱动电动机（110）的驱动脉冲信号的占空比设定得较大，以防止电动机的转速降低 （110）在活塞（127）的向前移动行程期间由于施加在电动机（110）上的负载而产生。
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20.发明授权Braking apparatus for three-phase brushless motor, and motor-driven appliance provided with same 有权用于三相无刷电机的制动装置，以及与此相同的电动机构公开(公告)号：US09246416B2
公开(公告)日：2016-01-26
申请号：US13895890
申请日：2013-05-16
申请人： MAKITA CORPORATION
发明人： Yoshitaka Ichikawa
摘要： A braking apparatus for a three-phase brushless motor is provided in a motor-driven appliance, and includes a switching circuit having six switching elements and a brake control device. The brake control device executes two-phase short-circuit control in braking control in which a braking force is generated in the motor. In the two-phase short-circuit control, an on/off state of each of the switching elements is set in such a manner that two out of three conduction paths constituting one of a positive electrode side conduction path that connects three terminals of the motor and a positive electrode side of a direct current power source and a negative electrode side conduction path that connects the three terminals and a negative electrode side of the power source are in a conducting state and other of the three conduction paths is in a non-conducting state.
摘要翻译： 一种用于三相无刷电动机的制动装置设置在电动机具中，并且包括具有六个开关元件和制动控制装置的开关电路。 制动控制装置在电动机中产生制动力的制动控制中进行两相短路控制。 在两相短路控制中，每个开关元件的导通/截止状态被设置成使三个导通路径中的两个构成连接电动机的三个端子的正极侧导电路径之一 直流电源的正极侧和连接电源的三个端子和负极侧的负极侧导电路径处于导通状态，三个导通路径中的另一个处于不导通状态 州。
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