An oil pulse tool including: a brushless motor which includes stator windings; a drive circuit configured to apply a driving voltage to any of the stator windings of the brushless motor at a predetermined timing; an oil pulse mechanism portion configured to be rotary driven by the brushless motor; and an output shaft which is connected to the oil pulse mechanism portion, wherein the drive circuit changes an advance angle of the driving voltage in accordance with a rotational position of the oil pulse mechanism portion.
申请公布号
US2012073846(A1)
申请公布日期
2012.03.29
申请号
US201113235323
申请日期
2011.09.16
申请人
HIRAI SHOUICHI;IWATA KAZUTAKA;HITACHI KOKI CO., LTD.,