公开(公告)号：US20210094158A1

公开(公告)日：2021-04-01

申请号：US17026390

申请日：2020-09-21

Applicant: MAKITA CORPORATION

Inventor： Itsuku KATO ,  Yasuhito KAWAI

IPC: B25B21/02 ,  B25B23/147

Abstract: An electric power tool in one aspect of the present disclosure includes a motor, an impact mechanism, and a control circuit. The control circuit executes a motor control process. The motor control process includes limiting an output of the motor in response to establishment of a preset condition. The preset condition is based on a load applied to the motor.

公开(公告)号：US20200269407A1

公开(公告)日：2020-08-27

申请号：US16793434

申请日：2020-02-18

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25D17/20 ,  B25D11/06 ,  B25D16/00

Abstract: A power tool, such as an impact driver, includes a motor having a rotor that rotates relative to a stator, and a centrifugal fan that rotates together with the rotor. A motor housing and a rear housing house the motor. Overlapping parts of the motor housing and the rear housing radially surround an outer circumference of the centrifugal fan. Air exhaust ports are defined in each of the overlapping parts and are offset in an axial direction of the rotor. Fluid communication paths are defined between the air exhaust ports in the overlapping parts. The fluid communication paths have an opening area or width in the axial direction that is smaller than an opening area or width in the axial direction of the air exhaust ports.

公开(公告)号：US20250073885A1

公开(公告)日：2025-03-06

申请号：US18787219

申请日：2024-07-29

Applicant: MAKITA CORPORATION

Inventor： Miyuki ASAHI ,  Yasuhito KAWAI ,  Tomoya HATTORI ,  Yuta SUZUKI ,  Haruki TEJIMA ,  Tokuo HIRABAYASHI ,  Tomoyuki KONDO

IPC: B25F5/02 ,  B25B21/02 ,  B25B23/18 ,  B25F5/00 ,  H02K5/04 ,  H02K7/102 ,  H02K11/30

Abstract: A power tool includes a motor, an output part, a housing, a control circuit board, and a panel. The motor includes a rotor rotatable about a motor rotation axis extending in a front-rear direction. The output part is disposed forward of the motor and is rotated by a rotational force of the rotor. The housing includes: a motor housing part that houses the motor; a grip part that extends downward from the motor housing part; and a battery holding part that is connected to a lower end of the grip part. The control circuit board is housed in the grip part and is configured to control the motor. The panel is disposed at a rear portion of the battery holding part and is manipulated to change a control method of the motor.

公开(公告)号：US20240082994A1

公开(公告)日：2024-03-14

申请号：US18510761

申请日：2023-11-16

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25B21/02

CPC classification number: B25B21/02

Abstract: Durability deterioration caused by a shock load is effectively reduced. An impact driver includes a motor, a carrier including a reduction assembly and rotatable by the motor, a shaft that receives rotation of the carrier and is rotatable relative to the carrier in an overloaded state, a hammer held by the shaft, and an anvil that is struck by the hammer in a rotation direction.

公开(公告)号：US20230158623A1

公开(公告)日：2023-05-25

申请号：US17958902

申请日：2022-10-03

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B23Q11/12 ,  B25B21/02

CPC classification number: B23Q11/122 ,  B25B21/026

Abstract: An impact driver includes a motor, a spindle, a hammer externally and coaxially mounted on the spindle to receive rotation of the spindle and move relative to the spindle in an axial direction, an anvil in front of the hammer and coaxial with the spindle to be struck by the hammer in a rotation direction, and a hammer case accommodating the spindle, the hammer, and the anvil, allowing a front end of the anvil to protrude frontward from the hammer case, and filled with grease. The spindle includes a grease supply path located in the spindle and open in a sliding surface of the spindle on which the hammer slides to allow grease to be supplied to the sliding surface, and an accelerator in the spindle to accelerate a flow of the grease onto the sliding surface along the grease supply path in response to rotation of the motor.

公开(公告)号：US20220212320A1

公开(公告)日：2022-07-07

申请号：US17548703

申请日：2021-12-13

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25B21/02

Abstract: Durability deterioration caused by a shock load is effectively reduced. An impact driver includes a motor, a carrier including a reduction assembly and rotatable by the motor, a shaft that receives rotation of the carrier and is rotatable relative to the carrier in an overloaded state, a hammer held by the shaft, and an anvil that is struck by the hammer in a rotation direction.

公开(公告)号：US20210060755A1

公开(公告)日：2021-03-04

申请号：US16935376

申请日：2020-07-22

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25F5/02 ,  H02K7/14 ,  H02K11/28 ,  H02K11/33

Abstract: Breakage of a controller in an electric work machine and components around the controller is reduced. The electric work machine includes a motor, a trigger switch operated to activate the motor, a controller that controls the motor, a housing including a grip on which the trigger switch is located and a controller compartment accommodating the controller, and a deformation reducing member located at an interface between the grip and the controller compartment to reduce deformation of the housing.

公开(公告)号：US20170151657A1

公开(公告)日：2017-06-01

申请号：US15356862

申请日：2016-11-21

Applicant: MAKITA CORPORATION

Inventor： Hidenori NAGASAKA ,  Ryunosuke KUMAGAI ,  Koji TSUKAMOTO ,  Tomonori KAWASE ,  Kosuke ITO ,  Tokuo HIRABAYASHI ,  Yasuhito KAWAI

IPC: B25B23/147 ,  B25B21/02 ,  H01H13/02 ,  H02K11/33 ,  H01H13/08

CPC classification number: B25B23/1475 ,  B25B21/02 ,  B25B23/00 ,  B25F5/02 ,  H01H13/023 ,  H01H13/08 ,  H01H2219/062 ,  H01H2221/016 ,  H02K7/145 ,  H02K11/33

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.