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公开(公告)号：US20230013915A1
公开(公告)日：2023-01-19
申请号：US17855410
申请日：2022-06-30
Applicant: MAKITA CORPORATION
Inventor： Ryo UMEMOTO , Hirokatsu YAMAMOTO , Shingo KAMINOKADO
Abstract: The cart may include: a driving wheel; a motor configured to rotate the driving wheel; a motor drive circuit configured to drive the motor; a control device configured to control the motor via the motor drive circuit so that a travelling speed of the cart becomes equal to or lower than an upper limit travelling speed; and an operation member arranged on the cart and configured to receive an operation by a user. The cart may be configured to operate in a manual mode where the motor is driven when the operation member is on and the motor is stopped when the operation member is off, and in an automatic mode were the motor is driven regardless of whether the operation member is on or off. The upper limit travelling speed in the automatic mode may be set lower than the upper limit travelling speed in the manual mode.
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公开(公告)号：US20180297186A1
公开(公告)日：2018-10-18
申请号：US15946029
申请日：2018-04-05
Applicant: MAKITA CORPORATION
Inventor： Hitoshi IIDA , Masanori FURUSAWA , Hirokatsu YAMAMOTO , Ryo UMEMOTO , Yoshinori SASAKI , Akira NAITO
Abstract: An impact tool includes a motor, a driving mechanism, and a vibration sensor. The driving mechanism is configured to perform a hammering operation of linearly driving a tool accessory along an impact-axis by power of the motor. The impact-axis extends in a front-rear direction of the impact tool. The vibration sensor is configured to detect vibrations. The vibration sensor is disposed such that the vibration sensor is capable of detecting vibrations of a first frequency among vibrations caused in the impact tool, and such that transmission of vibrations of a second frequency to the vibration sensor is suppressed. The vibrations of the first frequency result from the hammering operation. The second frequency is different from the first frequency.
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13.发明申请公开(公告)号：US20180038546A1
公开(公告)日：2018-02-08
申请号：US15660372
申请日：2017-07-26
Applicant: MAKITA CORPORATION
Inventor： Takeshi NISHIMIYA , Hirokatsu YAMAMOTO
CPC classification number: F16P3/00 , B24B23/028 , B25F5/00
Abstract: An electric power tool in one aspect of the present disclosure comprises a main body, a motor, a driver, a detector, and a kickback determiner. The kickback determiner determines that the main body is kicked back from a workpiece when an attitude change amount of the main body detected by the detector exceeds a preset kickback determination threshold during driving of the motor by the driver.
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14.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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Patent Agency Ranking
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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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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