公开(公告)号：US11850710B2

公开(公告)日：2023-12-26

申请号：US17464958

申请日：2021-09-02

Applicant: MAKITA CORPORATION

Inventor： Yuya Sano ,  Yuki Murai ,  Nobuaki Shikata

IPC: B25B21/02 ,  B25B23/00

CPC classification number: B25B21/02 ,  B25B23/0035

Abstract: An impact wrench (1) includes: a brushless motor (11); a hammer (17) disposed frontward of, and driven by, the brushless motor; and a hammer case (16), which houses the hammer. An anvil (4) of the impact wrench includes: an arm portion (25) disposed frontward of the hammer and configured to be impacted (struck) in a rotational direction by the hammer; a cylindrical portion (30) connected to the arm portion and supported by the hammer case; a square-column portion (31) disposed frontward of the cylindrical portion; and an enlarged portion (35) disposed between the cylindrical portion and the square-column portion and enlarging in a direction extending rearward from the square-column portion. A recessed portion (37) is continuous in a circumferential direction of the cylindrical portion and is disposed between the cylindrical portion and the enlarged portion of the anvil.

公开(公告)号：US12155291B2

公开(公告)日：2024-11-26

申请号：US18155854

申请日：2023-01-18

Applicant: MAKITA CORPORATION

Inventor： Hiroki Nagai ,  Takaya Yamada ,  Yuya Sano

IPC: H02K7/04 ,  H02K7/14 ,  H02K21/16 ,  B27B9/00

Abstract: A power tool includes a resin member in a rotor that is less susceptible to breaking. A power tool includes a stator, a rotor rotatable relative to the stator at a speed of 30000 rpm or greater, and an output unit drivable by the rotor. The stator includes a stator core, an insulator fixed to the stator core, and a coil held on the insulator. The rotor includes a rotor core having a slot, a permanent magnet received in the slot in the rotor core, and a resin member fixing the rotor core and the permanent magnet. The resin member includes an annular portion protruding from an end face of the rotor core. The annular portion includes a cut portion.

公开(公告)号：US11780060B2

公开(公告)日：2023-10-10

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

CPC classification number: 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.