公开(公告)号：US20240195243A1

公开(公告)日：2024-06-13

申请号：US18533455

申请日：2023-12-08

Applicant: MILWAUKEE ELECTRIC TOOL CORPORATION

Inventor： Rohan S. Gosalia ,  Zhiwei Zhang ,  Linnea Emerson ,  Keith Boulanger ,  Jeffrey C. Hessenberger ,  Matthew R. Bailey ,  Ashad Farhan

IPC: H02K1/2791 ,  H02K1/276 ,  H02K7/14 ,  H02K21/14 ,  H02K21/22

CPC classification number: H02K1/2791 ,  H02K1/276 ,  H02K7/145 ,  H02K21/14 ,  H02K21/22

Abstract: A power tool may include a battery pack interface configured to receive a removable and rechargeable battery pack. A device may include an outer rotor motor including a stator including a plurality of stator teeth configured to receive a plurality of stator coils and a rotor configured to rotate around the stator. The rotor includes a first permanent magnet positioned on an inner surface of the rotor, a second permanent magnet positioned on the inner surface of the rotor, and an air slot located between the first permanent magnet and the second permanent magnet on the inner surface of the rotor. The air slot has a length and a width. The length of the air slot is greater than a length of the first permanent magnet or the second permanent magnet.