公开(公告)号：US20210031342A1

公开(公告)日：2021-02-04

申请号：US16915068

申请日：2020-06-29

Applicant: MAKITA CORPORATION

Inventor： Koji TAKAHAGI

IPC: B25B23/145 ,  B25B21/02 ,  B25B21/00

Abstract: Torque produced in an oil unit is leveled irrespective of the temperature variation to maintain intended operation efficiency. An impact driver includes a brushless motor, and an oil unit rotatable by the brushless motor. The oil unit includes a case including a projection inside, a spindle protruding from the case, a coil spring held at the spindle in the case, and a blade held at the spindle in the case and urged outward in a radial direction of the case by the coil spring. The blade comes in contact with the projection in a rotation direction of the case.

公开(公告)号：US10906163B2

公开(公告)日：2021-02-02

申请号：US16654461

申请日：2019-10-16

Applicant: MAKITA CORPORATION

Inventor： Hidenori Nagasaka ,  Ryunosuke Kumagai ,  Koji Tsukamoto ,  Tomonori Kawase ,  Kosuke Ito ,  Tokuo Hirabayashi ,  Yasuhito Kawai

IPC: B25B23/00 ,  B25B23/147 ,  H02K7/14 ,  B25F5/02 ,  H02K11/33 ,  B25B21/02 ,  H01H13/02 ,  H01H13/08

Abstract: A power tool includes a tool-main-body part, an electric motor as a drive source, a grip part, which extends downward from the tool-main-body part and is configured to be gripped by a user, and a power-supply unit at a tip of the grip part. The power tool includes a controller configured to control the operation of the electric motor, the controller being located on the power-supply unit, and a display controlled by the controller and configured to indicate an operating state of the electric motor. The controller and the display each have a flat-plate shape and are disposed along a surface direction with respect to one another, and the display includes a first portion that overlies the controller and a second portion that projects beyond an end edge of the controller.

公开(公告)号：US20210023629A1

公开(公告)日：2021-01-28

申请号：US16934296

申请日：2020-07-21

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI ,  Tomoyuki KONDO

IPC: B23B31/107 ,  B25D16/00 ,  B25B21/02

Abstract: A tool-holding apparatus (70) includes an engaging member (71) for engaging a tool accessory (B) and being movably supported in axial and radial directions in a rotational-output shaft (26) having an insertion hole (81) for holding the tool accessory (B). A first biasing member (72) biases the engaging member towards engagement with the engaging member. A bit sleeve (73) is movable in the axial direction along an outer-circumferential surface of the rotational-output shaft between a blocking position at which radial outward movement of the engaging member is blocked and a permitting position at which radial outward movement of the engaging member is permitted. A second biasing member (74) biases the bit sleeve toward the blocking position. A positioning part (75) is fixed on the outer-circumferential surface of the rotational-output shaft and stops the bit sleeve at the blocking position. The bit sleeve has a projection (88), which is disposed on the forward side of the first biasing member, extends inward in the radial direction, and slidably contacts the rotational-output shaft.

公开(公告)号：US10903718B2

公开(公告)日：2021-01-26

申请号：US15919615

申请日：2018-03-13

Applicant: MAKITA CORPORATION

Inventor： Tatsuya Nagahama ,  Junya Inuzuka ,  Takashi Momose

IPC: H02K7/14 ,  B25F5/02 ,  H02K5/04 ,  H02K3/52 ,  H02K3/28 ,  H02K5/22 ,  H02K29/08 ,  H02K7/116 ,  H02K11/215 ,  H02K11/27 ,  B25F5/00

Abstract: A power tool (1; 90) includes a motor (17) having a stator (18) and a rotor (19). The stator (18) includes front and rear insulators (21, 22) respectively disposed forward and rearward of a stator core (20) in an axial direction thereof. At least six coils (23) are respectively wound on the stator (18) such that the coils (23) are wound through the front and rear insulators (21, 22). Winding wires (23a) respectively electrically connect circumferentially-adjacent pairs of the coils (23). A short circuiting device (25) short circuits respective pairs of windings (23a) that are located diagonally or diametrically across from one another.

公开(公告)号：US10903716B2

公开(公告)日：2021-01-26

申请号：US16135490

申请日：2018-09-19

Applicant: MAKITA CORPORATION

Inventor： Masaki Kamada ,  Fujio Nakano

IPC: H02K5/24 ,  H02K7/14 ,  H02K11/40 ,  H02K5/22 ,  H05K1/18 ,  B25F5/02 ,  B25F5/00 ,  H02K11/02 ,  H02K11/026 ,  H02K5/14

Abstract: An electric working machine includes a motor, a circuit board having capacitors and choke coils for noise reduction, and a fixing tool for fixing the circuit board to a portion of a case of the motor including motor terminals for power feed. The circuit board includes input terminal members to receive an externally supplied driving power, and a ground connection member electrically coupled to the portion of the case. The capacitors couple the input terminal members to the ground connection member. The choke coils couple the input terminal members to the motor terminals. The ground connection member is arranged in a certain area of the circuit board, which is one of areas on the circuit board defined by dividing the circuit board with a straight line crossing a rotational shaft and is an area where the input terminal members are located. The capacitors are mounted in the certain area.

公开(公告)号：US20210016463A1

公开(公告)日：2021-01-21

申请号：US16929332

申请日：2020-07-15

Applicant: MAKITA CORPORATION

Inventor： Zuoxiu ZHAO ,  Shixuan PENG ,  Pengsheng WANG ,  Xiongfei WEN

IPC: B27C1/04 ,  B27C1/14 ,  B27G3/00

Abstract: A thickness planer has a housing, a motor housed in the housing, a controller having a control board configured to control driving of the motor, at least one intake port provided in the housing, at least one outlet port provided in the housing, an air flow passage that is provided within the housing and configured such that air taken in from the at least one intake port flows therethrough toward the at least one outlet port via the motor , and a fan that is configured to generate flow of air from the at least one intake port to the at least one outlet port through the air flow passage. A particular region of the controller is arranged on the air flow passage.

公开(公告)号：USD907666S1

公开(公告)日：2021-01-12

申请号：US29714421

申请日：2019-11-22

Applicant: MAKITA CORPORATION

Designer： Shusheng Dai ,  Qinzhou Jiang ,  Xianming Li

公开(公告)号：US20210001418A1

公开(公告)日：2021-01-07

申请号：US16969445

申请日：2019-02-19

Applicant: MAKITA CORPORATION

Inventor： Tatsuo NAKASHIMA ,  Kenji NOSE ,  Takuji KIMURA

IPC: B23D45/16 ,  B25F5/02 ,  B27G19/04

Abstract: A suspending member, such as a tether strap or the like, may by connected to improve convenience for an operator. The function of the suspending member shall be reliably performed by clearly notifying the user when the connecting part for connecting the suspending member is damaged. A ring-shaped notification member is incorporated in a connecting part for connecting the suspending member. The suspending member is inserted into both of a connecting hole in a connecting part and a notification member so as to be connected. When an end of a handle portion breaks due to long-term use, the notification member is pulled out such that the damage of the connecting part is notified.

公开(公告)号：US10862376B2

公开(公告)日：2020-12-08

申请号：US16460149

申请日：2019-07-02

Applicant: MAKITA CORPORATION

Inventor： Kei Kouda ,  Akira Naito ,  Hideki Abe

IPC: H02K11/33 ,  A01D34/78 ,  A01D69/02 ,  A01D101/00

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：US10857660B2

公开(公告)日：2020-12-08

申请号：US16193860

申请日：2018-11-16

Applicant: MAKITA CORPORATION

Inventor： Yonosuke Aoki

IPC: B25F5/00 ,  B24B23/04 ,  B25F3/00 ,  B27B19/00 ,  B23D51/02 ,  B25F5/02 ,  B23D61/00

Abstract: A power tool includes a motor having an output shaft rotatable around a first axis, a spindle rotatably supported around a second axis, a transmitting mechanism configured to reciprocally rotate the spindle within a specified angle range around the second axis, an elongate support body supporting the motor, the spindle and the transmitting mechanism, an elongate housing that houses the support body, and a first elastic member interposed between the housing and a first end part of the support body and connecting the housing and the support body so as to be movable relative to each other. The spindle is supported in the first end part such that the second axis crosses the direction of a longitudinal axis of the support body. The support body has a weight provided to increase an inertia moment of the support body around the second axis.