公开(公告)号：US11673240B2

公开(公告)日：2023-06-13

申请号：US16935758

申请日：2020-07-22

Applicant: MAKITA CORPORATION

Inventor： Yuta Araki ,  Motohiro Omura ,  Akira Ito

IPC: B25B21/00 ,  B25B23/147 ,  B25F5/00

CPC classification number: B25B21/008 ,  B25B23/147 ,  B25F5/001

Abstract: A driver-drill (1) includes: a controller (32), which stops rotation of a brushless motor (9) when a torque applied to a spindle (26) reaches a prescribed clutch-actuation torque; and a dial (65), which is capable of specifying, to the controller (32), the setting of the prescribed clutch-actuation torque within a prescribed high-low range of values. In the controller (32), a relationship between clutch-actuation torques and each value in the high-low range is set such that, in a first range in which the values are low, changes in the clutch-actuation torques are the same in the low-speed mode and in the high-speed mode and such that, in a second range outside of the first range, the clutch-actuation torques in the low-speed mode are higher than in the high-speed mode.

公开(公告)号：US11031770B2

公开(公告)日：2021-06-08

申请号：US16099219

申请日：2017-04-26

Applicant: MAKITA CORPORATION

Inventor： Yuta Izutsu ,  Katsuhito Fujinami ,  Akira Ito

IPC: H02H3/20 ,  B25F5/00 ,  H02P27/06 ,  H02H7/122 ,  B23B45/02 ,  H02P29/024

Abstract: An electric working machine in one aspect of the present disclosure includes a main current-path, a driving unit including a motor and at least one first semiconductor-switching-element, a controller, a bypass current-path, a second semiconductor-switching-element, and a switch driver. The main current-path is arranged between a positive electrode and a negative electrode of a battery. The driving unit is situated in the main current path. The bypass current-path is arranged in parallel with the driving unit. The second semiconductor-switching-element is situated in the bypass current-path. The switch driver causes the second semiconductor-switching-element to interrupt the bypass current-path in an event that a voltage value of a drive voltage applied to the driving unit is less than a threshold value, and causes the second semiconductor-switching-element to complete the bypass current-path in an event that the voltage value is equal to or greater than the threshold value.

公开(公告)号：US11911881B2

公开(公告)日：2024-02-27

申请号：US18140717

申请日：2023-04-28

Applicant: MAKITA CORPORATION

Inventor： Yuta Araki ,  Motohiro Omura ,  Akira Ito

IPC: B25B21/00 ,  B25F5/00 ,  B25B23/147

CPC classification number: B25B21/008 ,  B25B23/147 ,  B25F5/001

Abstract: A rotary tool includes a motor having an axis of rotation extending in a forward-rearward direction of the rotary tool. A grip part is located below the axis of rotation in an up-down direction that is perpendicular to the forward-rearward direction. A planet gear is configured to be driven by the motor. An internal gear meshes with the planet gear and is movable in the forward-rearward direction to change a speed. A sun gear meshes with the planet gear, and an output shaft is configured to be rotationally driven by the sun gear. A sensor is configured to detect the forward-rearward movement of the internal gear, the sensor being disposed downward of the sun gear in the up-down direction.

公开(公告)号：US11420310B2

公开(公告)日：2022-08-23

申请号：US16722595

申请日：2019-12-20

Applicant: MAKITA CORPORATION

Inventor： Yuta Araki ,  Akira Ito

IPC: B23B23/00 ,  B25B23/147 ,  B25B21/02 ,  B25D16/00 ,  B25B21/00

Abstract: A power tool, such as a hammer driver-drill (1), includes: a motor (8); a motor housing (7A) that holds the motor (8); a grip housing (7B) connected to the motor housing (7A); a battery mount housing or enlarged-part housing (7C) connected to the grip housing (7B); and a dial (24) that is provided in the enlarged-part housing (7C) such that it is rotatable about a dial shaft (29). A threshold for stopping the motor (8) is settable by rotating the dial (24).

公开(公告)号：US12036641B2

公开(公告)日：2024-07-16

申请号：US18499267

申请日：2023-11-01

Applicant: MAKITA CORPORATION

Inventor： Takuma Iwatani ,  Makoto Chikaraishi ,  Kisho Sekido ,  Akira Ito

IPC: B25B23/18 ,  F21V33/00

CPC classification number: B25B23/18 ,  F21V33/0084

Abstract: A power tool (1; 101) includes: a motor (6; 106) having a stator (61) and a rotor (63), which is rotatable relative to the stator; an output part (8; 108) disposed more forward than the motor and configured to be rotated by the motor; a motor-housing part (21; 121), which houses the motor; a grip part (22; 122) disposed downward of the motor-housing part; a battery-holding part (23; 123) disposed downward of the grip part; and a COB light (50) disposed on the battery-holding part.

公开(公告)号：US11890730B2

公开(公告)日：2024-02-06

申请号：US17806163

申请日：2022-06-09

Applicant: MAKITA CORPORATION

Inventor： Yuta Araki ,  Akira Ito

IPC: B25B23/14 ,  B25B23/147 ,  B25B21/02 ,  B25D16/00 ,  B25B21/00

CPC classification number: B25B23/1475 ,  B25B21/007 ,  B25B21/023 ,  B25D16/006 ,  B25D2216/0084

Abstract: A driver drill includes a motor housing that holds an electric motor, an axis of rotation of a rotor of the electric motor extending in a front-rear direction of the driver drill, a grip housing having an upper end connected to a lower part of the motor housing and an enlarged-part housing connected to a lower end of the grip housing and spaced from the motor housing in an up-down direction of the driver drill that is perpendicular to the front-rear direction. A torque setting of the driver drill is changeable, and the driver drill is changeable between a setting unlocked state in which the torque setting is changeable and a setting locked state in which the torque setting is not changeable.