公开(公告)号：US20230291274A1

公开(公告)日：2023-09-14

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

CPC classification number: H02K7/04 ,  H02K7/145 ,  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.