-
公开(公告)号：US20220364555A1
公开(公告)日：2022-11-17
申请号：US17770725
申请日：2020-10-28
Applicant: MAKITA CORPORATION
Inventor： Makito TERAMOTO , Tomohiro HACHISUKA , Noriyuki NISHIDO , Kei KOUDA
Abstract: An air compressor includes a motor provided with a basic insulation, a first air compressing unit and a second air compressing unit that are driven by the motor, at least two tanks, and a discharge port. The at least two tanks are connected to the first air compressing unit and the second air compressing unit, store air compressed by the first air compressing unit and the second air compressing unit, and are connected to one another in series. The discharge port is disposed to a tank positioned on a most downstream of supplied compressed air and discharges the compressed air. The motor, the first air compressing unit and the second air compressing unit, and a tank on an upstream side with respect to the tank positioned on the most downstream are electrically insulated from the tank positioned on the most downstream and the discharge port.
-
公开(公告)号：US20230238856A1
公开(公告)日：2023-07-27
申请号：US18127293
申请日：2023-03-28
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA , Hideki ABE
CPC classification number: H02K7/003 , H02K5/08 , H02K5/161 , H02K21/16 , A01D34/78 , H02K7/083 , F16C3/02
Abstract: An electric work machine, such as a lawn mower includes a motor case (22) fixed inside a main-body housing (10). A brushless motor (21) is housed inside the motor case (22) and includes a stator (23) having a stator core (40), coils (45), and upper and lower insulators (42, 43), and a rotor (24) disposed inward of the stator (23) and having a rotary shaft (25). A spindle (17) is driven by the rotary shaft (25). The motor case (22) holds the stator (23) and axially supports the rotary shaft (25) via bearings (68, 76). One or more insulating members, such as an insulating cap (67) and/or a resin layer (78), provide electrical insulation between the stator core (40) and the rotary shaft (25).
-
公开(公告)号：US20200052558A1
公开(公告)日：2020-02-13
申请号：US16460149
申请日：2019-07-02
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA , Akira NAITO , Hideki ABE
Abstract: An electric work machine includes a brushless motor including a stator including a stator core, an electrical insulator located on the stator core, and at least one coil wound around the stator core with the electrical insulator in between, and a rotor rotatable with respect to the stator, and an output unit drivable by the brushless motor. The stator core has a through-hole and/or a recess to lock rotation of the stator with a screw.
-
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.
-
公开(公告)号：US20230076631A1
公开(公告)日：2023-03-09
申请号：US17929802
申请日：2022-09-06
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA
Abstract: An electric work machine (1) includes: a brushless motor having a stator disposed around a rotor (30); and an output part driven by the rotor. The rotor has a rotor core (31) and first and second magnetic-pole parts (34S, 34N) disposed around a circumferential direction of the rotor core. When the induced voltage of the brushless motor is given as Va, the power-supply voltage of the brushless motor is given as Vb, the rotational speed of the brushless motor is given as ω, a first induced voltage constant, which is expressed by Va/ω, is given as Ea [V/krpm], a pole-pairs count, which is the number of the first magnetic-pole parts or the second magnetic-pole parts, is given as Pi, and a second induced voltage constant, which is expressed as Ea/Pi, is given as Eb [V/krpm pole-pairs count], the motor satisfies the condition: Eb≤0.025×Vb.
-
Patent Agency Ranking
公开(公告)号：US20230066000A1
公开(公告)日：2023-03-02
申请号：US17890434
申请日：2022-08-18
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA
IPC: H02K21/12 , H02K7/14 , H02K3/34 , H02K11/215 , H02K1/278
Abstract: An electric work machine (1) includes: an inner-rotor-type brushless motor (6) having a stator (20) disposed around a rotor (30); and an output part (10), which is directly or indirectly driven by the rotor. The rotor comprises a rotor core (32) and eight permanent magnets (33) fixed to the rotor core. The stator comprises a stator core (21), one or more insulators (22, 23) fixed to the stator core, and six coils (24), which are respectively wound on teeth (21T) of the stator core via the insulator(s).
-
公开(公告)号：US20220416619A1
公开(公告)日：2022-12-29
申请号：US17903081
申请日：2022-09-06
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA , Hideki ABE
Abstract: An electric work machine, such as a lawn mower includes a motor case (22) fixed inside a main-body housing (10). A brushless motor (21) is housed inside the motor case (22) and includes a stator (23) having a stator core (40), coils (45), and upper and lower insulators (42, 43), and a rotor (24) disposed inward of the stator (23) and having a rotary shaft (25). A spindle (17) is driven by the rotary shaft (25). The motor case (22) holds the stator (23) and axially supports the rotary shaft (25) via bearings (68, 76). One or more insulating members, such as an insulating cap (67) and/or a resin layer (78), provide electrical insulation between the stator core (40) and the rotary shaft (25).
-
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。
-
公开(公告)号：US20250055360A1
公开(公告)日：2025-02-13
申请号：US18928528
申请日：2024-10-28
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA
Abstract: An electric work machine (1) includes: a brushless motor having a stator disposed around a rotor (30); and an output part driven by the rotor. The rotor has a rotor core (31) and first and second magnetic-pole parts (34S, 34N) disposed around a circumferential direction of the rotor core. When the induced voltage of the brushless motor is given as Va, the power-supply voltage of the brushless motor is given as Vb, the rotational speed of the brushless motor is given as ω, a first induced voltage constant, which is expressed by Va/ω, is given as Ea [V/krpm], a pole-pairs count, which is the number of the first magnetic-pole parts or the second magnetic-pole parts, is given as Pi, and a second induced voltage constant, which is expressed as Ea/Pi, is given as Eb [V/krpm·pole-pairs count], the motor satisfies the condition: Eb≤0.025×Vb.
-
公开(公告)号：US20230231457A1
公开(公告)日：2023-07-20
申请号：US17924430
申请日：2021-04-16
Applicant: MAKITA CORPORATION
Inventor： Kei KOUDA
CPC classification number: H02K21/16 , H02K1/146 , H02K1/276 , H02K7/145 , H02K9/06 , H02K11/215 , H02K11/33 , H02K15/022 , H02K2211/03
Abstract: An electric work machine includes a first brushless motor including a first stator and a first rotor combined with the first stator, and a controller. The first stator includes a first stator core and multiple first coils wound around multiple teeth on the stator core. The controller magnetizes the teeth to cause the first rotor to rotate about a rotation axis. In a plane orthogonal to the rotation axis, the first stator core has the same shape as a second stator core in a second stator used in a second brushless motor in another electric work machine. The first rotor can be combined with the second stator. The first rotor has a different number of poles from a second rotor used in the second brushless motor.
-
-
-
-
-
-
-
-
-
Search Results
19
records
(took 0.019 seconds)
