公开(公告)号：US20240189970A1

公开(公告)日：2024-06-13

申请号：US18528934

申请日：2023-12-05

Applicant: MAKITA CORPORATION

Inventor： Tokuo HIRABAYASHI ,  Kihiro KUSUMOTO ,  Tomoya HATTORI

IPC: B25B21/02 ,  B25B23/00

CPC classification number: B25B21/02 ,  B25B23/0035 ,  B25F5/001

Abstract: An impact wrench includes a motor including a rotor rotatable about a rotation axis extending in a front-rear direction, a spindle rotatable with a rotational force from the rotor, an anvil frontward from at least a part of the spindle and including an anvil shaft and an anvil projection, and a hammer including a hammer projection that strikes the anvil projection in a rotation direction. The anvil shaft includes a first shaft having a circular cross section, a second shaft having a rectangular cross section, and an intermediate portion between the first and second shafts. The second shaft includes four flat portions and four flat portion connectors. Each flat portion has a first edge and a second edge. The intermediate portion includes support portions each connected to the first edge and is connected to the second edge of each flat portion at positions rearward from the support portions.

公开(公告)号：US20230381942A1

公开(公告)日：2023-11-30

申请号：US18233483

申请日：2023-08-14

Applicant: MAKITA CORPORATION

Inventor： Kihiro KUSUMOTO ,  Kenji ABE

IPC: B25F5/00 ,  B25F5/02

CPC classification number: B25F5/008 ,  B25F5/001 ,  B25F5/02

Abstract: A power tool includes a motor including a stator and a rotor rotatable relative to the stator about a rotation axis, a gear drivable in response to rotation of the rotor, a motor compartment accommodating the motor, a rear cover covering a rear opening in the motor compartment, a gear case accommodating the gear and covering a front opening in the motor compartment, a first screw fastening the rear cover and the motor compartment together, and a second screw fastening the motor compartment and the gear case together, and at a different position from the first screw in a plane orthogonal to the rotation axis.

公开(公告)号：US20230364749A1

公开(公告)日：2023-11-16

申请号：US18176892

申请日：2023-03-01

Applicant: MAKITA CORPORATION

Inventor： Kihiro KUSUMOTO

IPC: B25B21/02

CPC classification number: B25B21/02

Abstract: An impact tool has less size increase and improved striking efficiency. An impact tool includes a motor, a spindle rotatable with a rotational force from the motor and including a spindle shaft and a flange, an anvil, a hammer, first and second coil springs surrounding the spindle shaft, a cup washer, and a support ball. The anvil includes an anvil shaft to receive a tip tool and an anvil projection protruding radially outward from the anvil shaft. The hammer includes a hammer projection to strike the anvil projection in a rotation direction, a recess at a rear of the hammer, and a support groove inside the recess. The cup washer is located in the recess and supports front ends of the first and second coil springs. The support ball is located in the support groove and supports the cup washer.

公开(公告)号：US20210283762A1

公开(公告)日：2021-09-16

申请号：US17144207

申请日：2021-01-08

Applicant: MAKITA CORPORATION

Inventor： Kihiro KUSUMOTO ,  Kenji ABE

IPC: B25F5/00 ,  B25F5/02

Abstract: A power tool includes a motor including a stator and a rotor rotatable relative to the stator about a rotation axis, a gear drivable in response to rotation of the rotor, a motor compartment accommodating the motor, a rear cover covering a rear opening in the motor compartment, a gear case accommodating the gear and covering a front opening in the motor compartment, a first screw fastening the rear cover and the motor compartment together, and a second screw fastening the motor compartment and the gear case together, and at a different position from the first screw in a plane orthogonal to the rotation axis.

公开(公告)号：US20210060741A1

公开(公告)日：2021-03-04

申请号：US16928466

申请日：2020-07-14

Applicant: MAKITA CORPORATION

Inventor： Kihiro KUSUMOTO ,  Tokuo HIRABAYASHI ,  Yuya SANO ,  Koji KASUGAI

IPC: B25B21/02 ,  B25F5/02

Abstract: An anvil receives less stress around a rectangular prism and has higher durability. An impact wrench includes a motor, a hammer rotatable by the motor, a body accommodating the motor and the hammer, and an anvil protruding frontward from the body and to be struck in a rotation direction by the hammer. The anvil includes a blade to be in contact with the hammer, a cylinder located frontward from the blade, a rectangular prism located frontward from the cylinder, at least one chamfered surface each at an edge of the rectangular prism, and a concave on a rear end of the at least one chamfered surface.