公开(公告)号：US20160151845A1

公开(公告)日：2016-06-02

申请号：US14904240

申请日：2014-03-31

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu YAMAMOTO ,  Takaaki OSADA ,  Yasushi OGURA

IPC: B23D59/00 ,  B23D51/16 ,  B23D49/16

CPC classification number: B23D59/001 ,  B23D49/16 ,  B23D49/162 ,  B23D51/16

Abstract: A reciprocating electric power tool in one aspect of the present invention includes an attachment unit, a motor, a power transmission unit, and a controller. The controller is configured to operate the motor at a first speed when activated; to operate the motor at a second speed that is higher than the first speed when a first condition is satisfied after activation; and, to operate the motor at a third speed that is higher than the second speed when a second condition is satisfied after the first condition is satisfied.

Abstract translation: 本发明的一个方面的往复式电动工具包括安装单元，马达，动力传递单元和控制器。 控制器被配置为在激活时以第一速度操作电动机; 以在激活后满足第一条件时以比第一速度高的第二速度操作电动机; 并且在满足第一条件之后满足第二条件时，以高于第二速度的第三速度操作电动机。

公开(公告)号：US20180099392A1

公开(公告)日：2018-04-12

申请号：US15723757

申请日：2017-10-03

Applicant: MAKITA CORPORATION

Inventor： Hikaru SUNABE ,  Hirokatsu YAMAMOTO ,  Takaaki OSADA

IPC: B25D11/00 ,  B25D16/00 ,  B25D17/24

CPC classification number: B25D11/005 ,  B25D16/006 ,  B25D17/043 ,  B25D17/24 ,  B25D2216/0015 ,  B25D2216/0023 ,  B25D2216/0038 ,  B25D2216/0084 ,  B25D2217/0057 ,  B25D2222/72 ,  B25D2250/095 ,  B25D2250/221 ,  B25D2250/265

Abstract: An electric power tool includes a housing, a motor, an output shaft, an acceleration sensor, and a twisted-motion detector. The housing is configured to house the motor and the output shaft. The acceleration sensor is configured to detect acceleration of the housing. The twisted-motion detector is configured to repeatedly obtain acceleration of the housing in the circumferential direction of the output shaft, to calculate a speed by integrating, of the obtained accelerations, accelerations obtained in a certain period, and to detect twisting of the housing from the speed.

公开(公告)号：US20150122523A1

公开(公告)日：2015-05-07

申请号：US14534418

申请日：2014-11-06

Applicant: MAKITA CORPORATION

Inventor： Hirokatsu YAMAMOTO ,  Takaaki OSADA ,  Manabu SUGIMOTO

IPC: B25F5/00

CPC classification number: B25F5/001 ,  B23B45/008 ,  B25B21/008 ,  B25B23/0064 ,  B25B23/141 ,  B25B23/147

Abstract: It is an object of the invention to provide a technique for enhancing the operability of a power tool.A representative screwdriver 100 is provided which has a motor 110 and a driving mechanism 120. The driving mechanism 120 has a rotation transmitting mechanism including a driving cam 137 and a driven cam 157, and a cam engagement state is switched by movement of the spindle 150 in a longitudinal direction of the spindle. The position of the spindle 150 in the longitudinal direction is detected by a detecting mechanism 162 that is disposed on the opposite side of the rotation transmitting mechanism from a front end region in the longitudinal direction of the spindle 150. A controller 180 controls the rotation speed of the motor 110 based on the detection result of the detecting mechanism 162 and drives the motor 110.

Abstract translation: 本发明的目的是提供一种用于增强电动工具的可操作性的技术。 提供了具有马达110和驱动机构120的代表性的螺丝刀100.驱动机构120具有包括驱动凸轮137和从动凸轮157的旋转传递机构，并且通过主轴150的移动来切换凸轮接合状态 在主轴的纵向上。 主轴150在纵向上的位置由检测机构162检测，该检测机构162从主轴150的纵向方向上的前端区域设置在旋转传递机构的相对侧上。控制器180控制旋转速度 基于检测机构162的检测结果，驱动电动机110。

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

IPC: B25B21/00 ,  B25B21/02 ,  B25F5/00

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.

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

IPC: H02P6/08 ,  H02P7/28

CPC classification number: H02P6/08 ,  B25F5/00 ,  H02P6/24 ,  H02P21/20 ,  H02P23/14 ,  H02P2205/05

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。

公开(公告)号：US20210078153A1

公开(公告)日：2021-03-18

申请号：US17018079

申请日：2020-09-11

Applicant: MAKITA CORPORATION

Inventor： Hikaru SUNABE ,  Hirokatsu YAMAMOTO ,  Takaaki OSADA

IPC: B25F5/00 ,  B25F5/02 ,  H02P29/00

Abstract: An electric working machine in one aspect of the present disclosure includes an output shaft, a motor, a housing, an acceleration detector, a twisted motion detector, a reference level changer, and a motor controller. The acceleration detector detects an acceleration of the housing in a circumferential direction of the output shaft. The twisted motion detector detects a twisted motion of the housing based on a reference level and the acceleration detected. The reference level determines that the housing is twisted. The reference level changer changes the reference level based on a rotating motion of the output shaft.

公开(公告)号：US20180272511A1

公开(公告)日：2018-09-27

申请号：US15928788

申请日：2018-03-22

Applicant: MAKITA CORPORATION

Inventor： Masahiko SAKO ,  Takaaki OSADA ,  Hirokatsu YAMAMOTO

IPC: B25B21/02 ,  B25B23/147

CPC classification number: B25B21/02 ,  B25B23/1405 ,  B25B23/1475

Abstract: An impact fastening tool may include a motor; a hammer configured to be rotationally driven by the motor; an anvil configured to he hit in a rotational direction by the hammer; a signal obtainer configured to obtain a variable signal. which varies in accordance with a hit to the anvil by the hammer; and a seating determiner configured to determine whether or not a fastener has been seated based on the variable signal obtained by the signal obtainer, wherein the seating determiner is configured to determine whether or not the fastener has been seated based on a signal component of the variable signal obtained by the signal obtainer, the signal component corresponding to a predetermined reference frequency.