| 摘要 |
<P>PROBLEM TO BE SOLVED: To effectively reduce the vibration and noise generated when a planetary reduction part is vibrated by an impact force. <P>SOLUTION: This impact rotary tool includes a motor 3, the planetary reduction part 4 constituted of a ring gear 20 and planetary gears 21, an impact force generating part 5 for converting the rotating power of the motor 3 into an impact force in the rotating direction, and a housing 10 in which these parts are stored. The impact rotary tool further includes a ring gear holding structure for holding the ring gear 20 in the housing 10 so as to be rotated within a predetermined range so that the ring gear 20 can be impulsively rotated when an impact force is generated, and a cushion member 14 interposed directly or indirectly between the ring gear 20 and the housing 10 so as to buffer the impulsive rotation of the ring gear 20. <P>COPYRIGHT: (C)2012,JPO&INPIT |
