公开(公告)号：US20170072533A1

公开(公告)日：2017-03-16

申请号：US15258010

申请日：2016-09-07

申请人： MAKITA CORPORATION

发明人： Tatsuya YOSHIZAKI ,  Yuta IZUTSU

IPC分类号： B24B55/05 ,  B24B23/02

CPC分类号： B24B55/052 ,  B24B23/02 ,  B24B23/028

摘要： A grinder includes a motor, a housing that houses the motor, a spindle that projects from the housing and is driven by the motor, and thereby rotates relative to the housing, and a wheel cover that is disposed on an outer-circumference side of the spindle and is configured to cover a portion of a tool accessory attached to the spindle. The grinder also includes a holding device for holding the wheel cover on the housing such that the arrangement and position of the wheel cover around the spindle can be changed but such that the wheel cover is not readily removable from the housing.

摘要翻译： 研磨机包括电动机，容纳电动机的壳体，从壳体突出并由电动机驱动并由此相对于壳体旋转的主轴，以及设置在壳体的外周侧的车轮罩 并且被构造成覆盖附接到主轴的工具附件的一部分。 研磨机还包括用于将轮盖保持在壳体上的保持装置，使得轮罩围绕心轴的布置和位置可以改变，但是轮盖不容易从壳体移除。

公开(公告)号：US20240082999A1

公开(公告)日：2024-03-14

申请号：US18241691

申请日：2023-09-01

申请人： MAKITA CORPORATION

发明人： Yuta IZUTSU ,  Hirokatsu YAMAMOTO ,  Yusuke FURUYA

IPC分类号： B25B23/147 ,  H02P23/00

CPC分类号： B25B23/147 ,  H02P23/0077

摘要： 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.

公开(公告)号：US20220286024A1

公开(公告)日：2022-09-08

申请号：US17625068

申请日：2020-07-27

申请人： MAKITA CORPORATION

发明人： Takaharu NAKATSUKA ,  Yuta IZUTSU

IPC分类号： H02K11/33 ,  H02K7/00 ,  H02K7/116 ,  H02K11/24 ,  H02K7/14 ,  B25F5/00

摘要： A power tool includes a motor including a rotor and a stator disposed around the rotor; an output shaft to which a tip tool is attached and that is rotated by power generated by the motor; a torque sensor unit that is disposed between the stator and the output shaft in a front-rear direction parallel to a rotation axis of the motor and that is coupled to the output shaft; an amplifier circuit that amplifies a detection signal of the torque sensor unit; and a housing including a motor housing part for housing the motor and a grip part. The torque sensor unit is disposed forward of the stator. The grip part is disposed downward of the motor housing part. The amplifier circuit is disposed upward of the grip part. The amplifier circuit is disposed forward of a rear end part of the stator.

公开(公告)号：US20220355362A1

公开(公告)日：2022-11-10

申请号：US17719481

申请日：2022-04-13

申请人： MAKITA CORPORATION

发明人： Yuta IZUTSU ,  Kisho SEKIDO

IPC分类号： B21J15/26 ,  B21J15/04 ,  B21J15/10 ,  B21J15/34 ,  B21J15/28

摘要： A fastening tool includes a motor, an anvil, a pin-gripping part, a magnet having the north pole and the south pole aligned in a front-rear direction and configured to move integrally with the pin-gripping part in the front-rear direction, a first magnetic sensor having a first sensing surface, a second magnetic sensor having a second sensing surface and disposed rearward of the first magnetic sensor, and a control device configured to move the pin-gripping part rearward based on a detection result of the second magnetic sensor and to move the pin-gripping part forward based on a detection result of the first magnetic sensor. The first and second magnetic sensors are unipolar detection type sensors configured to detect a same specified pole of the magnet. Orientations of the first sensing surface and the second sensing surface relative to a movement axis of the magnet are opposite to each other.

公开(公告)号：US20190157857A1

公开(公告)日：2019-05-23

申请号：US16099219

申请日：2017-04-26

申请人： MAKITA CORPORATION

发明人： Yuta IZUTSU ,  Katsuhito FUJINAMI ,  Akira ITO

IPC分类号： H02H3/20 ,  H02H7/122 ,  H02P27/06 ,  B25F5/00 ,  B23B45/02

摘要： An electric working machine in one aspect of the present disclosure includes a main current-path, a driving unit including a motor and at least one first semiconductor-switching-element, a controller, a bypass current-path, a second semiconductor-switching-element, and a switch driver. The main current-path is arranged between a positive electrode and a negative electrode of a battery. The driving unit is situated in the main current path. The bypass current-path is arranged in parallel with the driving unit. The second semiconductor-switching-element is situated in the bypass current-path. The switch driver causes the second semiconductor-switching-element to interrupt the bypass current-path in an event that a voltage value of a drive voltage applied to the driving unit is less than a threshold value, and causes the second semiconductor-switching-element to complete the bypass current-path in an event that the voltage value is equal to or greater than the threshold value.