公开(公告)号：US20230364752A1

公开(公告)日：2023-11-16

申请号：US18302070

申请日：2023-04-18

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25B21/02

CPC classification number: B25B21/026

Abstract: An impact tool includes: a motor; a spindle that includes a spindle shaft and a flange provided at a rear portion of the spindle shaft and that is rotated by a rotational force of the motor; a tool holding shaft at least a part of which is disposed forward of the spindle; a hammer that is supported by the spindle shaft and impacts the tool holding shaft in a rotation direction; and an elastic member disposed between a front surface of the flange and a support surface of the hammer disposed forward of the flange in the axial direction. The elastic member includes a disk spring.

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：US20190160636A1

公开(公告)日：2019-05-30

申请号：US16169303

申请日：2018-10-24

Applicant: MAKITA CORPORATION

Inventor： Tokuo HIRABAYASHI ,  Yasuhito KAWAI

IPC: B25B21/02

Abstract: An impact tool includes a motor, a first hammer, an anvil, and a second hammer. The first hammer is configured to be rotated by driving of the motor. The anvil is configured to be hammered in a rotation direction by the first hammer. The second hammer is configured to be switchable between a state being linked and a state not being linked to the first hammer. The impact tool ensures selections of a first hammering mode in which only the first hammer hammers the anvil and a second hammering mode in which the first hammer and the second hammer hammer the anvil.

公开(公告)号：US20230364750A1

公开(公告)日：2023-11-16

申请号：US18299277

申请日：2023-04-12

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25B21/02

CPC classification number: B25B21/02

Abstract: An impact tool includes a motor; a spindle that is rotated by rotational force of the motor; a tool holding shaft at least a part of which is disposed forward of the spindle; a hammer that is supported by the spindle and impacts the tool holding shaft in a rotation direction without being displaced in the axial direction; a hammer case that houses the hammer; and a hammer bearing that is held by the hammer case and supports the hammer in a rotatable manner.

公开(公告)号：US20230249264A1

公开(公告)日：2023-08-10

申请号：US18136362

申请日：2023-04-19

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI ,  Tomoyuki KONDO

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

CPC classification number: B23B31/1071 ,  B25B21/02 ,  B25D16/00

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：US20200047319A1

公开(公告)日：2020-02-13

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

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：US20190047131A1

公开(公告)日：2019-02-14

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 ,  H02P29/40 ,  B25B21/02

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：US20230415309A1

公开(公告)日：2023-12-28

申请号：US18196497

申请日：2023-05-12

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25B21/00 ,  B25B21/02 ,  B25F5/02 ,  H02K5/173 ,  H02K7/08 ,  H02K7/14

CPC classification number: B25B21/002 ,  B25B21/02 ,  B25F5/02 ,  H02K5/1732 ,  H02K7/083 ,  H02K7/145

Abstract: An electric work machine has less size increase. An electric work machine includes a motor including a stator and a rotor at least partially located radially inward from the stator and rotatable about a rotation axis, a spindle located frontward from the stator in a front-rear direction parallel to the rotation axis and rotatable under a rotational force generated by the rotor, and a spindle bearing supporting a rear portion of the spindle in a rotatable manner. The spindle bearing is located radially inward from the stator.

公开(公告)号：US20230364751A1

公开(公告)日：2023-11-16

申请号：US18302069

申请日：2023-04-18

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25B21/02

CPC classification number: B25B21/026

Abstract: An impact tool includes a motor, a spindle configured to rotate by a rotational force of the motor, a tool holding shaft at least a part of which is disposed in front of the spindle, a movable anvil movably supported by the tool holding shaft; and a hammer supported by the spindle and striking the movable anvil in a rotation direction without being displaced in an axial direction.

公开(公告)号：US20220305625A1

公开(公告)日：2022-09-29

申请号：US17684850

申请日：2022-03-02

Applicant: MAKITA CORPORATION

Inventor： Yasuhito KAWAI

IPC: B25B21/02

Abstract: An impact tool has a smaller diameter in its portion around a front end of an anvil. The impact tool includes a motor, a hammer rotatable by the motor, an anvil having a tool hole to receive a tip tool and being strikable by the hammer in a rotation direction and having a ball hole, a ball movable, through the ball hole, between an entered position at which the ball is at least partially inside the tool hole and a retracted position at which the ball is outside the tool hole, and at least one button operable to move the ball radially.