公开(公告)号：US20230412040A1

公开(公告)日：2023-12-21

申请号：US18329684

申请日：2023-06-06

Applicant: MAKITA CORPORATION

Inventor： Mitsuo SUENAGA ,  Keita MIZUKOSHI

IPC: H02K7/00 ,  B23D49/16 ,  H02K15/02

CPC classification number: H02K7/003 ,  B23D49/16 ,  H02K15/02

Abstract: A brushless motor (6) includes: a rotor (25), which rotates about a rotational axis (AX); and a stator (24), which is disposed around the rotor and comprises one or more coils (29). The rotor comprises a rotor core (31) and a rotor shaft (33), which is disposed in a shaft hole (60) of the rotor core. The rotor shaft includes: a thinner-diameter force-fitting segment (82), which is force-fit into the shaft hole with a first amount of force-fitting interference; and a thicker-diameter force-fitting segment (79), which is disposed at a location different from that of the thinner-diameter force-fitting segment in a front-rear direction parallel to the rotational axis and which is force-fit into the shaft hole with a second amount of force-fitting interference that is larger than the first amount of force-fitting interference.