公开(公告)号：US20180099394A1

公开(公告)日：2018-04-12

申请号：US15724766

申请日：2017-10-04

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka ICHIKAWA ,  Hirokatsu YAMAMOTO ,  Ryo UMEMOTO ,  Kunihisa SHIMA

IPC: B25D16/00 ,  B25D17/24

CPC classification number: B25D16/006 ,  B25D17/043 ,  B25D17/24 ,  B25D2211/068 ,  B25D2216/0015 ,  B25D2216/0023 ,  B25D2216/0038 ,  B25D2216/0084 ,  B25D2222/72 ,  B25D2250/121 ,  B25D2250/201 ,  B25D2250/221 ,  B25D2250/265

Abstract: An electric power tool according to one aspect of the present disclosure includes a main body, a motor, a tool holder configured to hold a tool bit, a hammer, a motion converter, a rotation transmitter, a first load detector, a second load detector, and a motor controller. The first load detector detects, based on information indicating a drive state of the motor, a load imposed from a work piece to the tool bit. The second load detector detects, based on information indicating a behavior of the main body, a load imposed from the work piece to the tool bit. The motor controller sets an upper limit of rotational speed of the motor to a predetermined no-load rotational speed in response to no-load on the tool bit being detected by both the first load detector and the second load detector.

公开(公告)号：US20230023514A1

公开(公告)日：2023-01-26

申请号：US17856340

申请日：2022-07-01

Applicant: MAKITA CORPORATION

Inventor： Kunihisa SHIMA ,  Hitoshi SUZUKI ,  Ryo UMEMOTO

IPC: B60L15/20 ,  B62B5/00 ,  H02P3/22 ,  H02P5/74

Abstract: A cart may include: a driving wheel; a motor configured to rotate the driving wheel; a motor drive circuit configured to drive the motor; a motor brake circuit configured to electrically brake the motor; a rotation speed sensor configured to detect a rotation speed of the motor; and a control device configured to control the motor via the motor drive circuit and the motor brake circuit based on a target rotation speed of the motor and the rotation speed detected by the rotation speed sensor. The motor brake circuit may include an electronically variable resistance element configured to operate in a linear mode and a switching mode in response to a control input signal. The motor brake circuit may be configured to operate. the electronically variable resistance element in the linear mode when braking the motor.

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

IPC: B23Q17/22 ,  B25D16/00 ,  G01H1/00 ,  B25D17/00 ,  H02P6/16

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.

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

IPC: E04G21/12 ,  B21F15/06 ,  B25B25/00

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.

公开(公告)号：US20230026990A1

公开(公告)日：2023-01-26

申请号：US17854847

申请日：2022-06-30

Applicant: MAKITA CORPORATION

Inventor： Ryo UMEMOTO

IPC: B60L15/20 ,  B62D5/04 ,  B60L3/00 ,  B60L15/30 ,  B62B5/00 ,  B62B5/04

Abstract: A cart may include: a driving wheel; a motor configured to rotate the driving wheel; a motor drive circuit configured to control electric power supply to the motor; a motor control device configured to control the motor via the motor drive circuit; a switching element arranged on an electric power supply path to the motor drive circuit; a switch circuit arranged separately from the motor control device and configured to switch the switching element between a conduction state and a non-conduction state; and an operation member arranged on the cart and configured to be operated by a user. The cart may operate in a manual mode in which 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 in which the motor is driven regardless of whether the operation member is on or off.

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

IPC: B25F5/02 ,  B25D17/04 ,  B25F5/00

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.

公开(公告)号：US20180099391A1

公开(公告)日：2018-04-12

申请号：US15723587

申请日：2017-10-03

Applicant: MAKITA CORPORATION

Inventor： Ryo UMEMOTO ,  Hirokatsu YAMAMOTO ,  Kunihisa SHIMA

IPC: B25D11/00 ,  B25D16/00

CPC classification number: B25D11/005 ,  B25D16/00 ,  B25D2216/0023 ,  B25D2216/0084 ,  B25D2217/0057 ,  B25D2222/72 ,  B25D2250/095 ,  B25D2250/221 ,  B25D2250/265 ,  B25F5/00

Abstract: An electric power tool of one aspect of the present disclosure includes a housing, a motor, an output shaft, a first power transmission, a second power transmission, a common sensor, a twisted-motion detector, and a vibration-based load detector. The common sensor detects a motion of the housing and outputs a detection signal indicating the detected motion. The twisted-motion detector detects a twisted-motion of the housing in a circumferential direction of the output shaft based on the detection signal. The vibration-based load detector detects a vibration of the housing in an axial direction of the output shaft based on the detection signal and detects a load on the output shaft based on the detected vibration.

公开(公告)号：US20230027921A1

公开(公告)日：2023-01-26

申请号：US17855367

申请日：2022-06-30

Applicant: MAKITA CORPORATION

Inventor： Ryo UMEMOTO ,  Hirokatsu YAMAMOTO

IPC: B60L15/20 ,  B62B5/00 ,  B60L15/30 ,  H02P3/22 ,  H02P5/74

Abstract: A cart may include a driving wheel, a motor configured to rotate the driving wheel, a motor drive circuit configured to drive the motor, a motor brake circuit configured to electrically brake the motor, a control device configured to control the motor via the motor drive circuit and the motor brake circuit so that a travelling speed of the cart becomes equal to or lower than an upper limit travelling speed, and a temperature sensor configured to detect a temperature of the motor brake circuit. The control device may be configured to change the upper limit travelling speed to a second upper limit travelling speed lower than the first upper limit travelling speed when the upper limit travelling speed is a first upper limit travelling speed and the temperature detected by the temperature sensor exceeds a first predetermined temperature.

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

IPC: B60L15/30 ,  B62B5/00 ,  B60L3/00

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.

公开(公告)号：US20210076757A1

公开(公告)日：2021-03-18

申请号：US16629653

申请日：2018-05-22

Applicant: MAKITA CORPORATION

Inventor： Tsuyoshi TANAKA ,  Yuki MIZUKOSHI ,  Ryo UMEMOTO

IPC: A41D1/00

Abstract: A garment includes a garment body, a wear detection device configured to detect whether the garment body is worn by a worker, and a control device configured to output an alert signal for controlling an alert device based on detection data of the wear detection device.