公开(公告)号：US20180241281A1

公开(公告)日：2018-08-23

申请号：US15874421

申请日：2018-01-18

Applicant: MAKITA CORPORATION

Inventor： Toan Van DOAN ,  Motohiro OMURA ,  Tatsuya NAGAHAMA

IPC: H02K7/08 ,  H02K21/14 ,  H02K11/215 ,  H02K7/14 ,  H02K5/16 ,  B25D16/00 ,  B25F5/02

CPC classification number: H02K7/083 ,  B25D16/003 ,  B25D16/006 ,  B25D17/00 ,  B25D2211/003 ,  B25D2211/061 ,  B25D2216/0015 ,  B25D2216/0023 ,  B25D2216/0038 ,  B25D2216/0084 ,  B25D2250/095 ,  B25D2250/221 ,  B25D2250/265 ,  B25D2250/331 ,  B25F5/00 ,  B25F5/02 ,  H02K3/522 ,  H02K5/161 ,  H02K7/14 ,  H02K7/145 ,  H02K11/215 ,  H02K21/145 ,  H02K2211/03

Abstract: A power tool including a brushless motor having a sensor circuit board has higher durability. The power tool includes a housing, a brushless motor including a rotor having a rotational shaft, a stator, and a sensor circuit board fixed to the stator and having a rotation detecting element that detects rotation of the rotor, and receiving the rotational shaft through the sensor circuit board, and a bearing held in the housing and supporting the rotational shaft. The bearing is located to overlap the rotation detecting element in an axial direction of the rotational shaft.