公开(公告)号：US20220077748A1

公开(公告)日：2022-03-10

申请号：US17529419

申请日：2021-11-18

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

Abstract: A power tool includes a brushless motor that has a stator including a tubular stator core, a rotor disposed in the tubular stator core, first and second electrically insulating members affixed to opposite ends of the stator core and a plurality of coils. A sensor-circuit board is supported by the first electrically insulating member. The first electrically insulating member is bounded by a first plane perpendicular to the rotational axis and a second plane perpendicular to the rotational axis, and the sensor-circuit board is located between the first plane and the second plane.

公开(公告)号：US20210083543A1

公开(公告)日：2021-03-18

申请号：US16954412

申请日：2018-12-19

Applicant: MAKITA CORPORATION

Inventor： Masahiro WATANABE ,  Akira NIWA

IPC: H02K5/08 ,  B25B23/18 ,  H02K11/33 ,  H02K11/215 ,  B25F5/02 ,  H02K5/22

Abstract: An electric working machine includes a molded member, a motor, a control circuit, and an electric circuit. The molded member includes an insulating material and is molded in one piece. The control circuit is configured to control the motor. The electric circuit is coupled to the control circuit. The electric circuit includes a surface circuit that is integrally arranged on a surface of the molded member.

公开(公告)号：US20190280560A1

公开(公告)日：2019-09-12

申请号：US16424822

申请日：2019-05-29

Applicant: MAKITA CORPORATION

Inventor： Akira NIWA ,  Kei KOUDA

IPC: H02K7/14 ,  H02K3/24 ,  H02K1/27 ,  H02K3/28 ,  H02K11/21 ,  H02K11/215 ,  H02K29/06 ,  H02K29/08 ,  H02K5/08 ,  H02K5/22 ,  H02K9/02

Abstract: A power tool includes a motor (8) having a stator (9), a rotor (10) and three terminals (81). The stator includes a tubular stator core (60) having six teeth (63), first and second electrically insulating members (61, 62) affixed to the stator core, and six coils (64) wound around the teeth such that three phases are defined. The three terminals are held by the first electrically insulating member and are respectively electrically connected to the three phases. All of the six coils may be formed by winding a single continuous winding wire (101) sequentially around each of the six teeth. All of the three terminals (81) may be disposed within a semicircular area of the stator core. At least a first crossover wire portion (102) of the winding wire may be disposed on the second electrically insulating member.

公开(公告)号：US20180034354A1

公开(公告)日：2018-02-01

申请号：US15609501

申请日：2017-05-31

Applicant: MAKITA CORPORATION

Inventor： Akira NIWA

IPC: H02K29/12 ,  H02K9/06 ,  H02K29/08

Abstract: In a brushless motor comprising a stator core having a plurality of teeth that protrude therefrom in radial directions, a front insulator which is attached to the stator core and which has a plurality of insulating portions that protrude therefrom along the direction of protrusion of the respective teeth, and a plurality of coils formed by magnet wire wound about each of the insulating portions at the respective teeth, a top face of the respective insulating portions of the front insulator is provided in advance with a deformable rib which is capable of being deformed by tension of the magnet wire wound thereabout, and the magnet wire is wound about the deformable rib to form the coils as the deformable rib is made to deform in correspondence to the external shape of the magnet wire.

公开(公告)号：US20180029148A1

公开(公告)日：2018-02-01

申请号：US15631949

申请日：2017-06-23

Applicant: MAKITA CORPORATION

Inventor： Ryosuke SUZUKI ,  Akira NIWA

IPC: B23D47/02 ,  B27B9/00 ,  B23B45/02 ,  B23B45/00 ,  B23D51/02

CPC classification number: B23D47/02 ,  B23B45/001 ,  B23B45/008 ,  B23B45/02 ,  B23B2260/128 ,  B23D51/02 ,  B25F5/008 ,  B27B9/00

Abstract: A covering member made of a resin is integrally molded with a sensor substrate of a brushless motor in a circular saw by low-temperature, low-pressure injection molding. The covering member covers rotation detecting elements, a thermistor, resistors, and connecting portions (terminals) of lead wires that serve as electrically conductive portions conducting electric currents.

公开(公告)号：US20170317548A1

公开(公告)日：2017-11-02

申请号：US15485765

申请日：2017-04-12

Applicant: MAKITA CORPORATION

Inventor： Ryosuke SUZUKI ,  Akira NIWA

IPC: H02K3/34 ,  B23D47/12 ,  B23D45/16 ,  H02K1/14 ,  H02K11/30

CPC classification number: H02K3/34 ,  B23D45/16 ,  B23D47/12 ,  B27B9/00 ,  H02K1/146 ,  H02K3/325 ,  H02K3/522 ,  H02K11/30 ,  H02K11/33 ,  H02K2213/03

Abstract: An electric power tool is configured to drive a tool bit. The electric power tool includes a motor that includes a stator and a rotor. The stator includes a cylindrical stator core that includes an inner peripheral side with a slot, a first insulator and a second insulator installed on respective both end surfaces of the stator core, and a coil wound around the slot of the stator core via the first insulator and the second insulator. The rotor is rotatable with respect to the stator. The rotor includes a rotor core and a rotation shaft. The first insulator overlaps with the second insulator in the slot in an axial direction of the stator core.

公开(公告)号：US20160211730A1

公开(公告)日：2016-07-21

申请号：US14960844

申请日：2015-12-07

Applicant: MAKITA CORPORATION

Inventor： Akira NIWA

IPC: H02K13/00 ,  H02K7/14 ,  H02K9/06

CPC classification number: H02K9/06 ,  B25F5/008 ,  H02K7/145 ,  H02K9/28

Abstract: An electric power tool includes a housing, a commutator motor housed in the housing, and a brush holder disposed in the housing. A fan is disposed to the commutator motor. The brush holder includes a metal sleeve and a resin base. The metal sleeve houses a brush, and the resin base holds the metal sleeve at one surface side of the resin base. The resin base includes an opening portion exposing the metal sleeve to the opposite side surface of the one surface side. The brush holder is disposed in a direction that the resin base is disposed at the fan side such that rotation of the fan causes air suctioned from an air intake opening disposed in the housing at the metal sleeve side to be discharged from an exhaust outlet disposed in the housing at the fan side after passing through the brush holder and a commutator.

Abstract translation: 电动工具包括壳体，容纳在壳体中的换向器马达以及设置在壳体中的电刷架。 风扇设置在换向器电动机上。 电刷架包括金属套筒和树脂基座。 金属套筒装有刷子，树脂基座将金属套筒保持在树脂基座的一个表面侧。 树脂基部包括将金属套筒暴露于一个表面侧的相对侧表面的开口部分。 刷保持器沿着树脂基部设置在风扇侧的方向设置，使得风扇的旋转使得从设置在壳体中的进气口抽吸的空气在金属套筒侧从排出口处的排气出口排出 风扇侧的外壳通过电刷架和换向器。