公开(公告)号：US12011813B2

公开(公告)日：2024-06-18

申请号：US17014012

申请日：2020-09-08

Applicant: MAKITA CORPORATION

Inventor： Hitoshi Suzuki ,  Seitaro Hayashi ,  Motohiro Omura ,  Itsuku Kato

IPC: H02H7/097 ,  B25F5/00 ,  H02P6/12 ,  H02P6/16 ,  H02P6/22 ,  H02P6/24 ,  H02P29/028

CPC classification number: B25F5/001 ,  H02H7/097 ,  H02P29/028 ,  H02P6/12 ,  H02P6/16 ,  H02P6/22 ,  H02P6/24

Abstract: An electric work machine (1; 110; 120; 130), such as a power tool, includes a motor (11) having a rotor, a drive part (13) that supplies electric currents to drive the motor, a rotational-direction selection part (17), and a motor-control part (14; 31, 32, 40, 50, 60; 14, 40, 60, 73, 80; 14, 60, 91). The rotational-direction selection part is configured for manually setting (selecting) the rotational direction of the rotor and outputs first and second setting signals that each indicate the set (selected) rotational direction. The motor-control part controls the drive part such that the rotor rotates in the rotational direction indicated by the first setting signal and/or the second setting signal. In response to a determination that the rotational directions indicated by the first and second setting signals are inconsistent, the motor-control part stops or prevents the drive of the motor.

公开(公告)号：US11811249B2

公开(公告)日：2023-11-07

申请号：US16890518

申请日：2020-06-02

Applicant: MAKITA CORPORATION

Inventor： Minoru Gyoda ,  Hitoshi Suzuki ,  Motohiro Omura

IPC: H02J7/00 ,  B25F5/00 ,  H01M50/574

CPC classification number: H02J7/00306 ,  B25F5/00 ,  H01M50/574 ,  H02J7/0063

Abstract: A battery-powered system includes a battery pack (10; 71; 81) connected to an electrical equipment (30; 50; 76; 86). The battery pack includes a first positive electrode terminal (11), a first negative electrode terminal (12), a first communication terminal (13), a first data input circuit (23), and a first limiting circuit (D11; D72; D82) that limits a flow of electric current in a direction from the first negative electrode terminal to the first communication terminal via the first data input circuit. The connected equipment includes a second positive electrode terminal (31; 51), a second negative electrode terminal (32; 52), a second communication terminal (33; 53), a second data input circuit (43; 63; 77; 87), and a second limiting circuit (D31; D51; D77; D87) that limits a flow of electric current in a direction from the second negative electrode terminal to the second communication terminal via the second data input circuit.

公开(公告)号：US11673240B2

公开(公告)日：2023-06-13

申请号：US16935758

申请日：2020-07-22

Applicant: MAKITA CORPORATION

Inventor： Yuta Araki ,  Motohiro Omura ,  Akira Ito

IPC: B25B21/00 ,  B25B23/147 ,  B25F5/00

CPC classification number: B25B21/008 ,  B25B23/147 ,  B25F5/001

Abstract: A driver-drill (1) includes: a controller (32), which stops rotation of a brushless motor (9) when a torque applied to a spindle (26) reaches a prescribed clutch-actuation torque; and a dial (65), which is capable of specifying, to the controller (32), the setting of the prescribed clutch-actuation torque within a prescribed high-low range of values. In the controller (32), a relationship between clutch-actuation torques and each value in the high-low range is set such that, in a first range in which the values are low, changes in the clutch-actuation torques are the same in the low-speed mode and in the high-speed mode and such that, in a second range outside of the first range, the clutch-actuation torques in the low-speed mode are higher than in the high-speed mode.

公开(公告)号：US10326337B2

公开(公告)日：2019-06-18

申请号：US14792008

申请日：2015-07-06

Applicant: MAKITA CORPORATION

Inventor： Motohiro Omura ,  Ryosuke Suzuki ,  Hideyuki Taga

IPC: H02K9/22 ,  B24B23/02 ,  H05K7/20 ,  B25F5/00 ,  H02K7/14 ,  H02K11/33

Abstract: In an electric power tool which houses a motor and a controller for controlling drive of the motor, the controller has a circuit board on which electric components are mounted and a heat radiation member which radiates heat of the electric components. The heat radiation member has a facing part which faces the circuit board in parallel to a board surface of the circuit board. The facing part is provided with steps by which a distance between the facing part and the board surface of the circuit board varies. Furthermore, the facing part of the heat radiation member is provided with a first facing part in which a relative distance with respect to the board surface of the circuit board is reduced.

公开(公告)号：US09844849B2

公开(公告)日：2017-12-19

申请号：US14597806

申请日：2015-01-15

Applicant: MAKITA CORPORATION

Inventor： Seitaro Hayashi ,  Goshi Ishikawa ,  Tatsuki Mori ,  Motohiro Omura ,  Tatsuya Yoshizaki

IPC: B25F5/00 ,  B23Q17/24 ,  B25B23/18 ,  B25F5/02 ,  B25B23/12 ,  B25B21/00 ,  H01H9/06

CPC classification number: B23Q17/2404 ,  B25B21/00 ,  B25B23/12 ,  B25B23/18 ,  B25F5/00 ,  B25F5/021 ,  H01H9/06

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.