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公开(公告)号：US20160190960A1
公开(公告)日：2016-06-30
申请号：US14978697
申请日：2015-12-22
Applicant: MAKITA CORPORATION
Inventor： Yuki KAWAI , Yoshitaka ICHIKAWA , Hirokatsu YAMAMOTO , Ying YANG
CPC classification number: H02P6/157 , H02P6/085 , H02P6/14 , H02P27/08 , H02P2201/03
Abstract: 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.
Abstract translation: 本公开的一个方面的电动驱动装置包括：无刷电动机; 全波整流电路; 驱动电路; 控制器 和强制停机单元。 强制停止单元执行强制停止控制，以在全波整流电压小于由多个线圈产生的感应电压的停止期间临时强制停止多个开关元件的开关动作，并且开关动作 要停止多个开关元件。
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12.发明申请公开(公告)号：US20180339385A1
公开(公告)日：2018-11-29
申请号：US15975904
申请日：2018-05-10
Applicant: MAKITA CORPORATION
Inventor： Hirokatsu YAMAMOTO , Ryo UMEMOTO
Abstract: An electric working machine in one aspect of the present disclosure includes a motor; an acceleration sensor; a load-determiner; a filter part having a cutoff frequency; and a filter-property setting part. The filter part removes an unwanted signal component from a detection signal from the acceleration sensor based on the cutoff frequency and inputs, to the load-determiner, the detection signal with the unwanted signal component removed. The filter-property setting part changes the cutoff frequency of the filter part such that a cutoff frequency in a high-speed rotation mode is higher than a cutoff frequency in a low-speed rotation mode.
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公开(公告)号：US20180297179A1
公开(公告)日：2018-10-18
申请号：US15948003
申请日：2018-04-09
Applicant: MAKITA CORPORATION
Inventor： Takaaki OSADA , Hirokatsu YAMAMOTO , Goshi ISHIKAWA , Kunihisa SHIMA
Abstract: A rotary impact tool in one aspect of the present disclosure includes a motor, an impact mechanism, an impact detector, and a controller. The controller executes constant duty ratio control from when the motor is started until an impact is detected by the impact detector. The controller executes constant rotation speed control in response to detection of an impact by the impact detector.
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公开(公告)号：US20180202178A1
公开(公告)日：2018-07-19
申请号：US15742573
申请日：2016-03-11
Applicant: MAKITA CORPORATION
Inventor： Kunihisa SHIMA , Hirokatsu YAMAMOTO , Ryo UMEMOTO
Abstract: A rebar tying device is configured to tie a plurality of rebars by a wire. The rebar tying device includes a feeder configured to feed the wire wound around a reel by a rotation of a feeding motor; a guide configured to guide the wire fed by the feeder to around the plurality of rebars; a cutter configured to cut the wire fed by the feeder at a predetermined position; a twister configured to twist the wire around the plurality of rebars; a battery configured to supply power to the feeding motor; and a control unit. The control unit configured to control a feeding length of the wire by controlling an energizing time of the feeding motor based on a predetermined feeding length of the wire.
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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
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.
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Patent Agency Ranking
公开(公告)号：US20150137721A1
公开(公告)日：2015-05-21
申请号：US14518301
申请日：2014-10-20
Applicant: MAKITA CORPORATION
Inventor： Hirokatsu YAMAMOTO , Takaaki OSADA
Abstract: A power tool comprises a motor, an output torque calculation unit configured to calculate an output torque of the motor based on a current flowing through the motor, a friction torque calculation unit configured to calculate a friction torque of the motor based on a rotation speed of the motor, a load torque estimation unit configured to estimate a load torque acting on the motor, an inertia torque calculation unit configured to calculate an inertia torque based on the output torque, the friction torque and the load torque, and a motor deceleration unit configured to stop or decelerate the motor when the inertia torque is greater than an inertia torque reference value.
Abstract translation: 电动工具包括电动机，输出转矩计算单元，被配置为基于流过电动机的电流来计算电动机的输出转矩;摩擦转矩计算单元，被配置为基于电动机的转速计算电动机的摩擦转矩 电动机，构造为估计作用在电动机上的负载转矩的负载转矩估计单元，被配置为基于输出转矩，摩擦转矩和负载转矩来计算惯性转矩的惯性转矩计算单元和配置成的电动机减速单元 当惯性转矩大于惯性转矩参考值时，停止或减速电机。
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公开(公告)号：US20240082999A1
公开(公告)日：2024-03-14
申请号：US18241691
申请日：2023-09-01
Applicant: MAKITA CORPORATION
Inventor： Yuta IZUTSU , Hirokatsu YAMAMOTO , Yusuke FURUYA
IPC: B25B23/147 , H02P23/00
CPC classification number: B25B23/147 , H02P23/0077
Abstract: One aspect of the present disclosure provides an electric power tool including an output shaft, a motor, a manual switch, a memory device, a first circuit, and a second circuit distinct from the first circuit. The memory device stores two or more sets of job information. Each of the two or more sets of job information includes at least one operation setting of the motor for performing an associated tightening operation. The first circuit (i) receives one set of job information and (ii) drives the motor in accordance with the at least one operation setting included in the one set of job information based on the manual switch being or having been manually operated. The second circuit outputs a next set of job information from the memory device to the first circuit based on the first circuit having completed driving the motor.
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公开(公告)号：US20190291255A1
公开(公告)日：2019-09-26
申请号：US16298409
申请日：2019-03-11
Applicant: MAKITA CORPORATION
Inventor： Kiyonobu YOSHIKANE , Yoshitaka MACHIDA , Taro HISANO , Hirokatsu YAMAMOTO
Abstract: A work tool includes a motor, a driving mechanism, a housing, a handle, a detecting mechanism and an elastic support part. The detecting mechanism is configured to detect information corresponding to an operating state of the work tool. The elastic support part supports the detecting mechanism so as to be movable relative to the housing in at least two of a front-rear direction, an up-down direction and a left-right direction. The elastic support part includes at least one elastic member disposed between the detecting mechanism and the housing. The elastic support part has respectively different spring constants in the at least two directions.
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公开(公告)号：US20190193879A1
公开(公告)日：2019-06-27
申请号：US16222076
申请日：2018-12-17
Applicant: MAKITA CORPORATION
Inventor： Hirokatsu YAMAMOTO , Kunihisa SHIMA
CPC classification number: B65B13/22 , B65B13/187 , B65B13/285
Abstract: A tying machine may include a twisting mechanism configured to twist a tying string. The twisting mechanism may include a twisting motor. The tying machine may be configured to obtain torque acting on the twisting motor as a twisting torque value, and stop the twisting motor when a predetermined tying completion condition is satisfied. The tying completion condition may include that an elapsed time since a rise in the twisting torque value was detected reaches a first predetermined time.
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公开(公告)号：US20180099399A1
公开(公告)日：2018-04-12
申请号：US15720451
申请日：2017-09-29
Applicant: MAKITA CORPORATION
Inventor： Hikaru SUNABE , Hirokatsu YAMAMOTO , Ryo UMEMOTO
CPC classification number: B25F5/02 , B25D16/00 , B25D17/04 , B25D2211/068 , B25D2216/0023 , B25D2250/165 , B25D2250/201 , B25D2250/221 , B25F5/006
Abstract: An electric power tool in one aspect of the present disclosure includes a housing; a motor; an output shaft; a rotation transmission; a motor controller; and a twisted-motion detector. The twisted-motion detector is disposed in the housing independently from the motor controller. The twisted-motion detector detects a twisted-motion of the housing in the circumferential direction of the output shaft and outputs a result of the detection to the motor controller.
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