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公开(公告)号：US20220094251A1
公开(公告)日：2022-03-24
申请号：US17417927
申请日：2019-12-20
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA
IPC: H02K29/08 , H02K1/276 , H02K11/215 , H02K7/14 , H02K11/33
Abstract: An electric work machine includes a motor, a driver, and a rotation sensor. The motor includes a stator, and a rotor of permanent-magnet type. The stator includes a cylindrical body, teeth, and coils. The rotation sensor is installed in an area of the stator close to the rotor than an area where the coils are disposed in a radial direction of the stator.
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公开(公告)号：US20160380510A1
公开(公告)日：2016-12-29
申请号：US15149634
申请日：2016-05-09
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA
CPC classification number: H02K11/0094 , H02K3/522 , H02K11/215 , H02K29/08
Abstract: A power tool includes a stator having a coil, a sensor circuit board attached to the stator and on which a magnetic sensor is provided, the sensor circuit board having a first side facing the stator and a second side opposite the first side, a rotor configured to rotate with respect to the stator, a tool-accessory retaining part configured to be driven by the rotor and a power-supply line configured to supply electrical power to the coil. The power-supply line is connected to the coil without traversing the second side of the sensor circuit board.
Abstract translation: 电动工具包括具有线圈的定子，附接到定子的传感器电路板，其上设置有磁性传感器，传感器电路板具有面向定子的第一侧和与第一侧相对的第二侧，转子配置 相对于定子旋转，被配置为由转子驱动的工具附件保持部分和被配置为向线圈供应电力的电源线。 电源线连接到线圈，而不穿过传感器电路板的第二侧。
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公开(公告)号：US20220085698A1
公开(公告)日：2022-03-17
申请号：US17418088
申请日：2019-12-20
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA , Kei KOUDA
Abstract: An electric work machine in one aspect of the present disclosure includes a motor, a driver, and a temperature sensor. The motor includes a stator, and a rotor. The stator includes a cylindrical body, a tooth, and a coil. The cylindrical body includes a first inner circumferential surface. The tooth is disposed to stand on the first inner circumferential surface. The coil is wound around the tooth. The coil generates a magnetic force in response to receiving an electric power. The temperature sensor is installed in/on the tooth.
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公开(公告)号：US20160226339A1
公开(公告)日：2016-08-04
申请号：US15002652
申请日：2016-01-21
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA , Kei KOUDA
CPC classification number: H02K7/145 , H02K1/14 , H02K1/27 , H02K3/24 , H02K3/28 , H02K5/08 , H02K5/225 , H02K9/02 , H02K11/21 , H02K11/215 , H02K29/06 , H02K29/08 , H02K2203/09 , H02K2211/03
Abstract: A power tool (1) includes a brushless motor (8) having a stator (9) and a rotor (10). The stator (9) includes: a tubular stator core (60); front and rear insulators (61, 62) fixed to the stator core; and coils (64), which are wound around a plurality of teeth (63) on the stator core. The rotor (10) includes: a rotor core (67) disposed within the stator; a rotary shaft (11) fixed to the rotor core; and one or more permanent magnets (68) fixed to the rotor core. A sensor-circuit board (65) detects the position(s) of the permanent magnet(s) and is fixed to the stator. One or more notched parts (91) is/are formed, in an outer circumference of the sensor-circuit board, between circumferentially-adjacent teeth in an axial direction of the stator. The notch part(s) allow(s) air for cooling the brushless motor to pass more easily through the interior of the stator.
Abstract translation: 电动工具（1）包括具有定子（9）和转子（10）的无刷电动机（8）。 定子（9）包括：管状定子芯（60）; 固定在所述定子铁芯上的前后绝缘体（61,62） 以及卷绕在定子铁芯上的多个齿（63）周围的线圈（64）。 转子（10）包括：设置在定子内的转子芯（67）; 固定在转子芯上的旋转轴（11）; 和一个或多个固定到转子芯上的永磁体（68）。 传感器电路板（65）检测永磁体的位置并固定在定子上。 在传感器电路板的外周中，在定子的轴向上在周向相邻的齿之间形成有一个或多个切口部（91）。 切口部分允许空气冷却无刷电动机以更容易地通过定子内部。
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公开(公告)号：US20250015543A1
公开(公告)日：2025-01-09
申请号：US18754820
申请日：2024-06-26
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA , Hitoshi SUZUKI
IPC: H01R13/66 , H01R13/26 , H01R13/447 , H01R31/06
Abstract: A battery-powered device in one aspect of the present disclosure includes a battery port, an electric load, a controller, and a terminal block. To the battery port, a battery pack including a first battery is attached. The electric load operates with first electric power of the first battery. The terminal block includes two or more machine-side terminals, a battery holder, and a wireless communicator. The two or more machine-side terminals are coupled to two or more battery-side terminals of the battery pack, respectively. In the battery holder, a second battery is removably held. The wireless communicator (i) receives second electric power from the second battery (ii) and performs a wireless communication.
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Patent Agency Ranking
公开(公告)号：US20230369940A1
公开(公告)日：2023-11-16
申请号：US18227380
申请日：2023-07-28
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA , Kei KOUDA
IPC: H02K7/14 , H02K11/21 , H02K3/28 , H02K1/27 , H02K3/24 , H02K29/08 , H02K29/06 , H02K11/215 , H02K5/08 , H02K5/22 , H02K9/02
CPC classification number: H02K7/145 , H02K11/21 , H02K3/28 , H02K1/27 , H02K3/24 , H02K29/08 , H02K29/06 , H02K11/215 , H02K5/08 , H02K5/225 , H02K9/02 , H02K1/14
Abstract: A power tool includes a brushless motor having a stator and a rotor. The stator includes a stator core having teeth, first and second insulators fixed to the stator core, and coils respectively wound around the teeth, all of the coils being wound around the first and second insulators. The rotor includes a rotor core disposed in the interior of the stator, a rotary shaft fixed to the rotor core, and one or more permanent magnets fixed to the rotor core. Power supply lines are configured to respectively supply current to the coils. Fusing terminals are fixed to the first insulator members. The fusing members respectively pinch the power supply lines and are thereby respectively electrically connected to the power supply lines.
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公开(公告)号：US20220337121A1
公开(公告)日：2022-10-20
申请号：US17632949
申请日：2020-06-19
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA
Abstract: An electric work machine includes: a motor having a rotor disposed in an interior of a stator and being rotatable about a rotational axis; and an output shaft, on which a tool accessory is mountable and which is configured to be driven using motive power output from the motor. The stator includes: a stator core; a coil wound on a portion of the stator core; and a fusing terminal disposed more inward in a radial direction of the stator core than the coil and being connected to the coil.
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公开(公告)号：US20210222866A1
公开(公告)日：2021-07-22
申请号：US17154090
申请日：2021-01-21
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA
Abstract: An electric working machine according to one aspect of the present disclosure includes a motor, a driving mechanism, a housing, a grip, a first light emitter, and a light guide. The first light emitter emits light. The light guide has a ring-shape. The light guide is extending along an outer circumference of the housing. The light guide includes a light entering surface receiving the light emitted from the first light emitter. While propagating the light entered from the light entering surface in the light guide, the light guide radiates the light from a surface of the light guide.
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公开(公告)号：US20160336838A1
公开(公告)日：2016-11-17
申请号：US15135979
申请日：2016-04-22
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA , Akira NIWA
IPC: H02K11/215 , H02K1/27 , H02K3/18 , B25B21/00 , H02K3/46 , H02K7/14 , B25F5/00 , H02K1/16 , H02K3/28
CPC classification number: H02K11/215 , B25B21/00 , B25B21/02 , B25F5/00 , H02K1/146 , H02K3/28 , H02K3/522 , H02K2201/03 , H02K2213/03
Abstract: A power tool, such as a hammer driver-drill (1), includes a brushless motor (8) having a stator (9) and a rotor (10). The stator (9) has slots (78) between teeth (63) that protrude inwardly. Coils (64) are respectively wound around each tooth (63) and the coils (64) of all phases are delta-connected in series. The rotor (10) includes permanent magnets (68) and is rotatably disposed in the interior of the stator (9). A sensor circuit board (65) is fixed to the stator (9) and includes magnetic sensors (66) that detect the rotational position of the rotor (10). The magnetic sensors (66) are provided at locations that correspond at least substantially to the centers of the slots (78) in the rotational direction of the rotor (10).
Abstract translation: 电动工具，例如锤式钻头（1），包括具有定子（9）和转子（10）的无刷电动机（8）。 定子（9）在向内突出的齿（63）之间具有槽（78）。 线圈（64）分别围绕每个齿（63）缠绕，并且所有相的线圈（64）串联三角形连接。 转子（10）包括永磁体（68），并且可旋转地设置在定子（9）的内部。 传感器电路板（65）固定在定子（9）上，并包括检测转子（10）旋转位置的磁传感器（66）。 磁传感器（66）设置在至少基本上与转子（10）的旋转方向上的槽（78）的中心对应的位置处。
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公开(公告)号：US20240097464A1
公开(公告)日：2024-03-21
申请号：US18462505
申请日：2023-09-07
Applicant: MAKITA CORPORATION
Inventor： Akira NIWA
CPC classification number: H02J7/0045 , H01M10/46
Abstract: An accommodating box may include: a case; and a plurality of battery attaching units supported by the case. Each of the battery packs may include an engagement member configured to engage with the electrical device when the battery pack is attached to the electrical device, engagement between the battery pack and the electrical device being released by a user's operation on the engagement member. Each of the battery attaching units may include: a terminal member unit configured to be electrically connected to one of the battery packs when the battery pack is attached to the battery attaching unit; and a holding member that holds the terminal member unit. The holding member may not be engaged with the engagement member of the battery pack when the battery pack is attached to the battery attaching unit.
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