公开(公告)号：US20220111497A1

公开(公告)日：2022-04-14

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

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.