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.

公开(公告)号：US11278837B2

公开(公告)日：2022-03-22

申请号：US16806133

申请日：2020-03-02

Applicant: MAKITA CORPORATION

Inventor： Takayuki Tahara ,  Makoto Hotta

IPC: B01D46/42 ,  B01D46/02 ,  H01M50/20 ,  A47L5/36 ,  A47L9/28

Abstract: A backpack dust collector includes a housing. The housing includes: a suction port; a dust collecting chamber connected to the suction port and configured to accommodate a dust collecting bag; a motor chamber connected to the dust collecting chamber and accommodating a fan and a motor; an exhaust port through which air from the motor chamber is discharged; first and second battery openings; and first and second battery receiving portions respectively corresponding to the first and second battery openings. At least part of the first battery opening is formed on a left side surface of the housing, and at least part of the second battery opening is formed on a right side surface of the housing.

公开(公告)号：US20220077700A1

公开(公告)日：2022-03-10

申请号：US17527778

申请日：2021-11-16

Applicant: MAKITA CORPORATION

Inventor： Hiroshi INOUE ,  Yoshihiro ISHIKAWA

IPC: H02J7/00 ,  H01M10/42 ,  H01M10/46 ,  H01M50/543

Abstract: In one aspect, the present disclosure discloses a charging system including a battery pack and a charger. The battery pack includes a first battery pack terminal, a second battery pack terminal, and a third battery pack terminal. The second battery pack terminal is spaced apart from the first battery pack terminal in an intersecting direction. The intersecting direction intersects a removal direction of the battery pack from the charger. The charger includes a first charger terminal, a second charger terminal, and a third charger terminal. The second battery pack terminal is arranged so as to pass through an area spaced apart from the third charger terminal in a process of removing the battery pack from the charger.

公开(公告)号：US11260515B2

公开(公告)日：2022-03-01

申请号：US16655556

申请日：2019-10-17

Applicant: MAKITA CORPORATION

Inventor： Yoshihiro Ito

IPC: B25B21/02 ,  B25F5/00 ,  H02K9/06 ,  B25B21/00 ,  B25B23/145 ,  H02K7/116

Abstract: A rotary power tool, such as an oil pulse driver, includes: a motor, a pinion rotated by the motor, planet gears that mesh with the pinion, an internal gear that meshes with the planet gears and a shaft that is rotationally driven by the planet gears and disposed frontward of the planet gears. The internal gear comprises an internal gear part and an internal gear retaining part for holding the internal gear part. An oil unit bearing is disposed frontward of the internal gear part, and the oil unit bearing is held at a front part of the internal gear retaining part.

公开(公告)号：US11247323B2

公开(公告)日：2022-02-15

申请号：US16056717

申请日：2018-08-07

Applicant: MAKITA CORPORATION

Inventor： Ryunosuke Kumagai ,  Masahiro Watanabe ,  Jiro Suzuki ,  Kosuke Ito

IPC: B25B23/151 ,  B25F5/00 ,  B25B21/00 ,  B25B23/147 ,  H02P6/08 ,  B25B21/02 ,  H02K7/14 ,  H02P27/04

Abstract: An electric working machine in one aspect of the present disclosure includes a motor, a setter, and a controller. The setter is configured to modifiably set a change characteristic in changing a rotational state of the motor from a low speed rotation to a high speed rotation. The high speed rotation is greater than the low speed rotation in rotational frequency of the motor.

公开(公告)号：US11235453B2

公开(公告)日：2022-02-01

申请号：US16052747

申请日：2018-08-02

Applicant: MAKITA CORPORATION

Inventor： Yoshitaka Ichikawa ,  Goshi Ishikawa ,  Shinichi Hira ,  Yasuhito Kawai ,  Masahiro Watanabe ,  Takuya Kusakawa

IPC: B25F5/00 ,  B25B21/00 ,  H02P6/08 ,  B25B23/147 ,  H02P29/40 ,  B25B21/02 ,  H02P27/04

Abstract: An electric working machine in one aspect of the present disclosure includes a motor, a controller, and a setter. The controller is configured to change a rotational state of the motor, in response to an establishment of a condition for change after the motor is initiated, from a low speed rotation to a high speed rotation. The setter is configured to set, based on a situation in the motor in the low speed rotation, a control variable of the motor in the high speed rotation and/or the condition for change.

公开(公告)号：US20220029214A1

公开(公告)日：2022-01-27

申请号：US17297279

申请日：2019-11-07

Applicant: MAKITA CORPORATION

Inventor： Kohei NAKATANI ,  Kazuya TANAKA ,  Hiroki UESUGI

IPC: H01M10/48 ,  H01M10/613 ,  H01M10/643 ,  H01M50/213 ,  H01M10/6235 ,  H01M50/247 ,  H01M10/42

Abstract: A battery pack contains a plurality of battery cells that includes a first battery cell and a second battery cell; a first thermistor disposed closest to the first battery cell among the battery cells; a second thermistor disposed closest to the second battery cell among the battery cells. A case of the battery pack holds the battery cells, the first thermistor, and the second thermistor. The first battery cell is disposed such that at least one of the other battery cells is interposed between the first battery cell and a wall surface of the case in a direction orthogonal to a longitudinal direction of the first battery cell. The second battery cell is disposed such that none of the other battery cells is interposed between the second battery cell and the wall surface of the case in a direction orthogonal to a longitudinal direction of the second battery cell.

公开(公告)号：US20220021065A1

公开(公告)日：2022-01-20

申请号：US17343365

申请日：2021-06-09

Applicant: MAKITA CORPORATION

Inventor： Ryuki YUEDA

IPC: H01M50/267 ,  B01F11/00 ,  B01F15/00 ,  E04G21/06 ,  H02K11/00

Abstract: An electric work machine allows use of batteries with different sizes with battery covers and allows easy maintenance of a damaged battery cover. A rechargeable concrete vibrator includes a motor, a motor housing accommodating the motor, a battery holder connected to the motor housing to receive a battery in a detachable manner, and a battery cover to cover an overall part of the battery held by the battery holder. The battery cover is attachable to and detachable from the battery holder.

公开(公告)号：US20220009073A1

公开(公告)日：2022-01-13

申请号：US17363487

申请日：2021-06-30

Applicant: MAKITA CORPORATION

Inventor： Tomoki TAKATA ,  Katsumi OKOUCHI ,  Takuji KIMURA

IPC: B25F5/02 ,  B24B23/04

Abstract: A portable power tool includes a first handle extending in an elongated manner and configured to be held by a user, an electric motor, a tool accessory that undergoes orbital and/or rotational motion in response to generation of a rotational driving force by the electric motor, and a battery mounting part configured to detachably attach a battery that serves as a power source for the electric motor. The battery mounting part includes an upward mounting surface on which the battery is mountable, and at least one terminal configured to be electrically connected to the battery when a surface of the battery that includes a connection interface is placed on the mounting surface. The mounting surface is located at a position different from the first handle in the front-rear direction, and is located below an upper side of the first handle in the up-down direction.

公开(公告)号：US20220006347A1

公开(公告)日：2022-01-06

申请号：US17342232

申请日：2021-06-08

Applicant: MAKITA CORPORATION

Inventor： Fuminari FUJII

IPC: H02K3/52 ,  H02K5/04 ,  H02K7/14 ,  H02K9/06 ,  H02K21/16

Abstract: An electric work machine includes a smaller motor. An electric work machine includes a motor and a housing accommodating the motor. The motor includes a stator and a rotor rotatable about a rotation axis. The stator includes a stator core, an insulator fixed to the stator core, a plurality of coils fixed to the insulator, and a terminal connected to each of the plurality of coils. The housing includes at least one first tab in contact with at least a part of a surface of the stator. The at least one first tab is at the same position as at least a part of the terminal in an axial direction parallel to the rotation axis.