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公开(公告)号：US20190084107A1
公开(公告)日：2019-03-21
申请号：US16131525
申请日：2018-09-14
Applicant: MAKITA CORPORATION
Inventor： Michisada YABUGUCHI
Abstract: A rotary tool or machine includes: an output shaft; a motor that rotates the output shaft; an operation part for commanding driving/stopping of the motor; and a control unit that controls the driving/stopping of the motor in accordance with commands from the operation part. The control unit is configured to generate a braking force in the motor or on the output shaft when the motor is to be stopped in proportion to a tightening force (torque) applied to the tool accessory when the motor is started up, such that the greater the tightening force (torque), the greater the braking force.
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公开(公告)号：US20040017119A1
公开(公告)日：2004-01-29
申请号：US10449331
申请日：2003-05-29
Inventor： Hirokatsu Yamamoto , Simoru Otogao
IPC: H02K011/00 , H02K009/00
Abstract: It is an object of the present teachings to provide a technique that rationalizes the structure of the brushless motor so as to save space in the power tool. According to the present teachings, a representative brushless motor utilized in a power tool may comprise a stator, a rotor and a cooling fan. The brushless motor is disposed within the power tool. The brushless motor is adapted to supply driving current to the stator to drive a tool bit of the power tool by rotating the rotor. The cooling fan is molded of a magnetic or conductive material so that the cooling fan also serves as a rotating position detector that detects the rotating position of the rotor with respect to the stator. Because the cooling fan may also have a function of rotating position detector of the rotor, the inner space of the power tool can be rationalized.
Abstract translation: 本发明的目的是提供一种使无刷电动机的结构合理化以便节省电动工具空间的技术。 根据本教导，在动力工具中使用的代表性的无刷电动机可以包括定子，转子和冷却风扇。 无刷电动机设置在动力工具内。 无刷电动机适于通过旋转转子向定子提供驱动电流以驱动电动工具的工具头。 冷却风扇由磁性或导电材料模制而成，使得冷却风扇也用作检测转子相对于定子的旋转位置的旋转位置检测器。 因为冷却风扇也可以具有旋转位置检测器的功能，因此可以使电动工具的内部空间合理化。
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公开(公告)号：US20250070623A1
公开(公告)日：2025-02-27
申请号：US18815134
申请日：2024-08-26
Applicant: MAKITA CORPORATION
Inventor： Yoshimasa FUKUOKA
Abstract: A motor used for an electric power tool includes a cylindrical-shaped stator, a rotor arranged on an inner circumferential side of the stator, and a sensor board arranged at an axial end of the stator. The sensor board includes a board main body located radially inside of the stator when viewed from an axial direction of the stator, and a leg protruding radially outward from the board main body toward the stator. The stator is exposed at least on one side of the leg in a circumferential direction of the stator. The motor further includes a sensor which is mountable on the leg so as to face the rotor and detects rotation of the rotor.
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公开(公告)号：US20250063992A1
公开(公告)日：2025-02-27
申请号：US18810048
申请日：2024-08-20
Applicant: MAKITA CORPORATION
Inventor： Ryo Sunazuka
Abstract: A working machine may include a first working machine part, a second working machine part, and a vibration damping member positioned between them. The vibration damping member may include a first mount portion configured to be attached to a first mount element disposed on one of the first working machine part and the second working machine part, a second mount portion offset in a first direction from the first mount portion and configured to be attached to a second mount element disposed on the other of the first working machine part and the second working machine part, a first connection portion connecting the first mount portion to the second mount portion, and a first recessed groove defined in a portion of an outer surface of the vibration damping member that corresponds to an outer surface of the first connection portion.
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公开(公告)号：US12233517B2
公开(公告)日：2025-02-25
申请号：US17982649
申请日：2022-11-08
Applicant: MAKITA CORPORATION
Inventor： Itsuku Kato
IPC: B25B23/147
Abstract: The electric work machine in one aspect of the present disclosure includes an output shaft, a motor, a current measuring circuit, and a controller. The current measuring circuit measures a current value, the current value corresponding to a magnitude of a drive current flowing through the motor. The controller sets a maximum value and a threshold. The controller calculates the correction value less than or equal to the maximum value so that the drive current decreases, in response to the current value having reached the threshold. The controller subtracts, from the control parameter, the correction value calculated, thereby correcting the control parameter. The controller drives the motor based on the control parameter corrected.
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Patent Agency Ranking
公开(公告)号：US12226841B2
公开(公告)日：2025-02-18
申请号：US17678257
申请日：2022-02-23
Applicant: MAKITA CORPORATION
Inventor： Tomohiro Ukai , Shoichi Ishikawa
Abstract: A reciprocating cutting tool reduces dispersion of dust. The reciprocating cutting tool includes a reciprocation converter drivable by a motor, a rod-like slider connected to the reciprocation converter to be reciprocable, a blade holder at the front end of the slider to hold a blade, a power transmission housing housing the reciprocation converter and allowing the slider to protrude from its front end, a cover outward from the power transmission housing, and a fan rotatable together with a rotor in the motor. A first passage of cooling air from the fan is defined between the power transmission housing and the cover. The first passage branches into a second passage toward the blade holder and a third passage not toward the blade holder.
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公开(公告)号：US20250049275A1
公开(公告)日：2025-02-13
申请号：US18764797
申请日：2024-07-05
Applicant: MAKITA CORPORATION
Inventor： Bang Wang , Xiongfei Wen , Yoshiro Tada , Takahiro Nishikawa
Abstract: A dust collecting attachment includes a dust suction portion and a main body. The dust suction portion has a suction opening through which a tip tool is allowed to pass. The main body has a dust collection passage communicated with the dust suction portion and connectable to an external hose. The main body includes a suction space, an air vent hole, and an air vent operation portion. The suction space is communicated with the dust collection passage and has a suction port opening to a workpiece. The air vent hole opens the suction space to outside. The air vent operation portion normally closes the air vent hole and opens the air vent hole by a predetermined operation. The air vent operation portion is operated together with an operation of removing the main body from the workpiece to open the air vent hole.
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公开(公告)号：US12220791B2
公开(公告)日：2025-02-11
申请号：US18409099
申请日：2024-01-10
Applicant: MAKITA CORPORATION
Inventor： Ryunosuke Kumagai , Tokuo Hirabayashi , Hidenori Nagasaka , Manabu Sugimoto
Abstract: An impact tool includes a brushless motor having a rotor extending in a front-rear direction and disposed in a motor housing constituted by left, right and rear motor housings. A battery pack is disposed below the motor housing in an up-down direction. A plurality of first screws extend in a left-right direction and fix the left motor housing to the right motor housing. A plurality of second screws extend in the front-rear direction and fix the rear motor housing to the left and right motor housings. A fan is disposed between the rotor and the rear motor housing, a grip housing is disposed downward of the motor housing, and a planetary gear mechanism is disposed frontward of the motor. A spindle is disposed frontward of the planetary gear mechanism, a hammer is disposed on an outer circumference of the spindle, and an anvil is disposed frontward of the hammer.
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公开(公告)号：USD1059982S1
公开(公告)日：2025-02-04
申请号：US29845101
申请日：2022-07-05
Applicant: MAKITA CORPORATION
Designer： Tomonori Kawase
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公开(公告)号：US12218538B2
公开(公告)日：2025-02-04
申请号：US17680459
申请日：2022-02-25
Applicant: MAKITA CORPORATION
Inventor： Katsuhito Fujinami , Ken Yamauchi , Yasuyuki Fujimoto
IPC: H02J7/00 , A41D1/00 , H01M50/204 , H01M50/247
Abstract: A voltage control device in one aspect of the present disclosure includes an appliance connector, a voltage output circuit, a manual switch, and a controller. The voltage output circuit outputs an operating voltage based on a direct voltage received from a direct-current power source. In response to a first electric appliance being connected to the appliance connector, the controller controls the voltage output circuit so as to fix the operating voltage. In response to a second electric appliance being connected to the appliance connector, the controller controls the voltage output circuit so as to vary the operating voltage in accordance with a manual operation applied to the manual switch.
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