公开(公告)号：US11979049B2

公开(公告)日：2024-05-07

申请号：US17274396

申请日：2019-09-11

申请人： MAKITA CORPORATION

发明人： Yoshitaka Ichikawa ,  Tadahiko Kobayakawa

IPC分类号： H02J7/00 ,  A01D34/68 ,  A01D34/78 ,  H01M10/48 ,  H02K7/14 ,  H02K11/33

CPC分类号： H02J7/00714 ,  A01D34/68 ,  A01D34/78 ,  H01M10/48 ,  H02J7/0044 ,  H02K7/145 ,  H02K11/33

摘要： An electric work machine (1), such as a power tool, comprises a motor (50), a manipulatable part (12) such as a trigger switch, and a control part (36). The motor is energized with electric current supplied by a battery pack (22). By manipulating the manipulatable part, the control part energizes the motor. The control part also acquires information concerning the state of the battery from the battery pack, and, if appropriate based on the information obtained from the battery pack, takes measures (such as limiting a discharge current) to restrain, delay and possibly avert the performance of a protection (discharge-prohibited) operation by the battery pack.

公开(公告)号：US10131047B2

公开(公告)日：2018-11-20

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

IPC分类号： B25C1/04 ,  B25C1/06

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.

公开(公告)号：US11476790B2

公开(公告)日：2022-10-18

申请号：US16715560

申请日：2019-12-16

申请人： MAKITA CORPORATION

发明人： Yoshitaka Ichikawa ,  Akihiro Nakamoto

IPC分类号： H02P29/024 ,  H02P27/06 ,  A01G3/06 ,  A01G3/053 ,  B25F5/02

摘要： An electric working machine in one aspect of the present disclosure includes two or more circuits and a control circuit. The control circuit executes two or more diagnoses one by one in order. The diagnoses at least include a first diagnosis and a second diagnosis. The first diagnosis diagnoses a first circuit. The second diagnosis diagnoses a second circuit. The control circuit executes the first diagnosis or the second diagnosis at a first diagnosis timing. The control circuit executes the first diagnosis or the second diagnosis at a second diagnosis timing. The second diagnosis timing follows the first diagnosis timing.

公开(公告)号：US11235453B2

公开(公告)日：2022-02-01

申请号：US16052747

申请日：2018-08-02

申请人： MAKITA CORPORATION

发明人： Yoshitaka Ichikawa ,  Goshi Ishikawa ,  Shinichi Hira ,  Yasuhito Kawai ,  Masahiro Watanabe ,  Takuya Kusakawa

IPC分类号： B25F5/00 ,  B25B21/00 ,  H02P6/08 ,  B25B23/147 ,  H02P29/40 ,  B25B21/02 ,  H02P27/04

摘要： An electric working machine in one aspect of the present disclosure includes a motor, a controller, and a setter. The controller is configured to change a rotational state of the motor, in response to an establishment of a condition for change after the motor is initiated, from a low speed rotation to a high speed rotation. The setter is configured to set, based on a situation in the motor in the low speed rotation, a control variable of the motor in the high speed rotation and/or the condition for change.

公开(公告)号：US12057719B2

公开(公告)日：2024-08-06

申请号：US17275504

申请日：2019-09-12

申请人： MAKITA CORPORATION

发明人： Yoshitaka Ichikawa ,  Akihiro Nakamoto ,  Minoru Gyoda ,  Hayato Kano ,  Toru Yamada ,  Hitoshi Suzuki

IPC分类号： H02P1/00 ,  H01M10/48 ,  H02J7/00 ,  H02P3/00 ,  H02P3/06 ,  H02P5/00

CPC分类号： H02J7/0029 ,  H01M10/48 ,  H02J7/00032 ,  H02J7/0063 ,  H02P3/06

摘要： A battery pack is configured to supply electric power to an electric work machine, such as a power tool or outdoor power equipment. The battery pack includes a first battery-signal terminal and a second battery-signal terminal. The first battery-signal terminal outputs, to the electric work machine, a first signal indicating that discharging is to be prohibited or permitted. The second battery-signal terminal outputs, to the electric work machine, a second signal indicating that discharging is to be prohibited or permitted. Thus, two communication paths are provided for transmitting signals to permit or prohibit discharging of the battery pack.

公开(公告)号：US11641798B2

公开(公告)日：2023-05-09

申请号：US16787140

申请日：2020-02-11

申请人： MAKITA CORPORATION

发明人： Yoshitaka Ichikawa

IPC分类号： A01D34/78 ,  A01D34/68 ,  B25F3/00 ,  B25F5/00 ,  A01D34/416 ,  A01D101/00

CPC分类号： A01D34/78 ,  A01D34/6806 ,  B25F3/00 ,  B25F5/001 ,  A01D34/416 ,  A01D2101/00

摘要： An electric working machine includes an attachment portion, a motor, and a controller. Multiple types of tip tools are alternatively attached to the attachment portion. The motor drives the tip tool attached to the attachment portion. The controller has first start control and second start control. The controller is configured to execute the first start control so as to determine the type of the tip tool when not having tool type information, and configured to execute the second start control when having the tool type information.

公开(公告)号：US11533841B2

公开(公告)日：2022-12-27

申请号：US16778276

申请日：2020-01-31

申请人： MAKITA CORPORATION

发明人： Tatsuya Hata ,  Hiroshi Nojiri ,  Yoshitaka Ichikawa

IPC分类号： A01D34/73 ,  A01D34/78 ,  A01G3/06 ,  A01D34/416 ,  A01D34/90 ,  A01D34/82

摘要： One aspect of the present disclosure provides an electric working machine. The electric working machine includes a driver, a motor, and a control circuit. Attached to the driver is a selected tool. The motor drives the selected tool attached to the driver. The control circuit sets a target rotational frequency based on the selected tool. The control circuit controls the motor to rotate at the target rotational frequency.

公开(公告)号：US10348227B2

公开(公告)日：2019-07-09

申请号：US15278523

申请日：2016-09-28

申请人： MAKITA CORPORATION

发明人： Yoshitaka Ichikawa

IPC分类号： H02P3/14 ,  H02P6/24 ,  H02K11/215 ,  H02P23/20 ,  B25F5/00 ,  H02P27/08 ,  H02P29/024

摘要： One aspect of the present disclosure relates to an electric power tool including a motor, an operation unit, a bridge circuit, and a control unit. The control unit performs a brake control when the motor is braked, and performs a regenerative current inhibition control before stopping the brake control when a drive command is inputted to the operation unit while the brake control is performed.

公开(公告)号：US09621081B2

公开(公告)日：2017-04-11

申请号：US14978697

申请日：2015-12-22

申请人： MAKITA CORPORATION

发明人： Yuki Kawai ,  Yoshitaka Ichikawa ,  Hirokatsu Yamamoto ,  Ying Yang

IPC分类号： H02P27/04 ,  H02P6/00 ,  H02P6/14 ,  H02P27/08 ,  H02P6/15

CPC分类号： H02P6/157 ,  H02P6/085 ,  H02P6/14 ,  H02P27/08 ,  H02P2201/03

摘要： A motor-driven apparatus in one aspect of the present disclosure includes: a brushless motor; a full-wave rectifier circuit; a drive circuit; a controller; and a forcible stop unit. The forcible stop unit performs a forcible stop control to temporarily forcibly stop a switching operation of a plurality of switching elements during a stop period when a full-wave rectified voltage is smaller than an induced voltage generated by a plurality of coils, and the switching operation of the plurality of switching elements is to be stopped.

公开(公告)号：US11770079B2

公开(公告)日：2023-09-26

申请号：US17889109

申请日：2022-08-16

申请人： MAKITA CORPORATION

发明人： Yoshitaka Ichikawa

IPC分类号： H02J7/00 ,  H02P1/12 ,  H02P29/00 ,  H01M10/48

CPC分类号： H02P1/12 ,  H01M10/48 ,  H02J7/0063 ,  H02J7/00712 ,  H02P29/0016 ,  H02P2209/09

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.