公开(公告)号：US20190194959A1

公开(公告)日：2019-06-27

申请号：US16222632

申请日：2018-12-17

Applicant: MAKITA CORPORATION

Inventor： Kunihisa SHIMA ,  Yuki KAWAI

IPC: E04G21/12

CPC classification number: E04G21/123

Abstract: A tying machine may include a feeding mechanism configured to feed a tying string, a battery, and a voltage detection circuit configured to detect a voltage of the battery. The feeding mechanism may include a feeding motor to which power is supplied from the battery. The tying machine may be configured to set a duty ratio for driving the feeding motor when feeding the tying string, in accordance with the voltage of the battery detected by the voltage detection circuit.

公开(公告)号：US20210180347A1

公开(公告)日：2021-06-17

申请号：US17115045

申请日：2020-12-08

Applicant: MAKITA CORPORATION

Inventor： Shunta MIZUNO ,  Yuki KAWAI

IPC: E04G21/12 ,  E04C5/16 ,  B21F15/04

Abstract: A rebar tying tool includes: a feed mechanism (24), which includes a first brushless motor (32) and performs an advancing process that advances a wire (W) and a draw-back process that draws back the wire (W); a first inverter circuit (212), which is electrically connected to the first brushless motor; and a control unit (202), which controls the first brushless motor via the first inverter circuit. The first brushless motor comprises a first Hall-effect sensor (180), which is disposed on a first sensor board (178). In the advancing process, the control unit performs lead-angle control on the first brushless motor at a first lead angle. In the draw-back process, the control unit performs lead-angle control on the first brushless motor at a second lead angle. The first lead angle is set to be larger than the second lead angle.

公开(公告)号：US20190283111A1

公开(公告)日：2019-09-19

申请号：US16465130

申请日：2017-11-24

Applicant: MAKITA CORPORATION

Inventor： Yuki KAWAI ,  Michisada YABUGUCHI ,  Hiroki IKUTA ,  Toshihito YABUNAKA

IPC: B21J15/26 ,  B21J15/10

Abstract: A fastening tool includes a fastener-abutment part, a pin-gripping part, a motor, a driving mechanism, an input-accepting part and a motor-control part. The fastener-abutment part is configured to abut on a cylindrical part of a fastener. The pin-gripping part is configured to grip a portion of a pin of the fastener. The driving mechanism is configured to be driven by power of the motor to move the pin-gripping part rearward along a driving axis relative to the fastener-abutment part, thereby fastening a workpiece via the fastener. The input-accepting part is configured to accept setting information for a control condition of the motor inputted via an operation part configured to be externally operated by a user. The motor-control part is configured to control operation of the driving mechanism by controlling driving of the motor according to the control condition based on the setting information accepted by the input-accepting part.

公开(公告)号：US20170302211A1

公开(公告)日：2017-10-19

申请号：US15484479

申请日：2017-04-11

Applicant: MAKITA CORPORATION

Inventor： Akihiro NAKAMOTO ,  Itsuku KATO ,  Yuki KAWAI

IPC: H02P27/06 ,  H02M1/08 ,  B23D47/12 ,  H02M7/06 ,  B23D45/16

Abstract: An electric working machine of an example of the present disclosure includes: a motor; a power supply portion; a controller; and a voltage detector. The power supply portion generates a DC voltage to drive the motor by rectifying an AC voltage supplied from an AC power source and smoothing by a capacitor. The controller controls energization of the motor. The voltage detector detects the AC voltage. The controller is configured to interrupt the energization when the voltage detector does not detect the AC voltage.

公开(公告)号：US20200244193A1

公开(公告)日：2020-07-30

申请号：US16849417

申请日：2020-04-15

Applicant: MAKITA CORPORATION

Inventor： Yuki KAWAI ,  Itsuku KATO

IPC: H02P1/02 ,  H02P6/20 ,  H02H9/00 ,  H02P29/024 ,  H03K17/567 ,  H03K5/1536 ,  H02M7/06 ,  H02M1/36

Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a rectifier circuit, a capacitor, a series switching element, a resistive element, a drive circuit, a peak voltage value acquirer, and a controller. The capacitor smooths power rectified by the rectifier circuit. The series switching element is coupled in series with the capacitor. The resistive element is coupled in parallel with the series switching element. The controller brings the series switching element into conduction in a case where AC power is inputted to the rectifier circuit and where a specified conducting condition based on a peak voltage value acquired by the peak voltage value acquirer is satisfied.

公开(公告)号：US20190283110A1

公开(公告)日：2019-09-19

申请号：US16465120

申请日：2017-11-24

Applicant: MAKITA CORPORATION

Inventor： Yuki KAWAI ,  Michisada YABUGUCHI ,  Hiroki IKUTA ,  Toshihito YABUNAKA

IPC: B21J15/26

Abstract: A fastening tool includes a bolt-gripping part, an anvil, a motor, and a control part. When the bolt-gripping part grips an end region of a shaft part and moves relative to the anvil in a first direction of a longitudinal-axis direction, the anvil presses a collar fitted onto the shaft part in a second direction opposite to the first direction of the longitudinal-axis direction and inward in a radial direction of the collar, so that a hollow part of the collar is crimped to a groove while the workpiece is clamped between the collar and a head part, whereby swaging of a fastener is completed while the end region remains integrated with the shaft part. The control part completes swaging of the fastener by terminating a movement of the bolt-gripping part in the first direction relative to the anvil based on driving current of the motor.

公开(公告)号：US20180080453A1

公开(公告)日：2018-03-22

申请号：US15568062

申请日：2016-04-19

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu YAMAMOTO ,  Yuki KAWAI ,  Makoto TAKAHASHI

IPC: F04D25/08 ,  F04D25/06 ,  F04D27/00 ,  H02P5/46 ,  H02P6/04 ,  H02P6/18

CPC classification number: F04D25/08 ,  F04D25/0673 ,  F04D25/166 ,  F04D27/004 ,  F04D27/008 ,  H02P5/46 ,  H02P6/04 ,  H02P6/06 ,  H02P6/18 ,  H02P2006/045

Abstract: A backpack-type blower according to one aspect of the present disclosure includes a plurality of fans, a plurality of DC power supplies and a backpack. The plurality of fans and the plurality of DC power supplies are mounted on the backpack. The backpack-type blower is configured to blow winds from the plurality of fans together.

公开(公告)号：US20180034388A1

公开(公告)日：2018-02-01

申请号：US15657484

申请日：2017-07-24

Applicant: MAKITA CORPORATION

Inventor： Yuki KAWAI ,  Itsuku KATO

IPC: H02P1/02 ,  H02M7/06 ,  H02M1/36 ,  H03K5/1536 ,  H03K17/567

CPC classification number: H02P1/022 ,  H02H9/002 ,  H02M1/36 ,  H02M7/062 ,  H02P6/20 ,  H02P29/0241 ,  H03K5/1536 ,  H03K17/567

Abstract: An electric working machine according to one aspect of the present disclosure comprises a motor, a rectifier circuit, a capacitor, a series switching element, a resistive element, a drive circuit, a peak voltage value acquirer, and a controller. The capacitor smooths power rectified by the rectifier circuit. The series switching element is coupled in series with the capacitor. The resistive element is coupled in parallel with the series switching element. The controller brings the series switching element into conduction in a case where AC power is inputted to the rectifier circuit and where a specified conducting condition based on a peak voltage value acquired by the peak voltage value acquirer is satisfied.

公开(公告)号：US20230075030A1

公开(公告)日：2023-03-09

申请号：US17897624

申请日：2022-08-29

Applicant: MAKITA CORPORATION

Inventor： Yuki KAWAI ,  Naoya ASAMI

IPC: H02P29/10 ,  H02P7/22 ,  H02P7/29 ,  H02P29/40 ,  F04D25/06

Abstract: A blower in one aspect of the present disclosure includes: a housing including a first discharge port; a motor in the housing; a fan in the housing; an attachment fitting portion; and a motor drive circuit. The attachment fitting portion is configured to detachably attach, to the first discharge port, an attachment including a second discharge port. The motor drive circuit (i) delivers a designated power to the motor and (ii) performs a constant power control that maintains a magnitude of an electric power delivered to the motor at a magnitude of the designated power.

公开(公告)号：US20230071190A1

公开(公告)日：2023-03-09

申请号：US17899363

申请日：2022-08-30

Applicant: MAKITA CORPORATION

Inventor： Yuki KAWAI ,  Naoya ASAMI

IPC: F04D25/06 ,  H02K7/14 ,  H02P3/06 ,  H02P23/14

Abstract: A blower in one aspect of the present disclosure includes: a housing including a suction port and a discharge port; a motor in the housing; a fan in the housing; a motor drive circuit; and a control circuit. The control circuit detects an insufficient airflow from the suction port to the discharge port based on an operation parameter. The operation parameter is associated with an operation of the motor.