| 摘要 |
Disclosed is a centrifugal impact wrench using an electric driving motor, which is rotated by electricity supplied from an electric power source, as a power source. The electric impact wrench includes: a sun gear 21 coupled to a rotation shaft 11 of the electric driving motor 10 and rotating; a plurality of planetary gears 22 including first gear 22a engaged with the sun gear 21 and rotating, and second gear 22b having a smaller diameter than the first gear 22a; an output gear 23 engaged with the second gear 22b of the planetary gear 22 and rotating; an inertia wheel 50 rotated by rotation force transmitted from the output gear 23; a spindle 70 rotatably connected to a front portion of the inertia wheel 50 and provided with a connector 71 at a side of the spindle 50; and a blow body 60 hitting the connector 71 when centrifugal force caused by the rotation of the inertia wheel 50 increases over a predetermined extent, and returning to an initial position by means of a return spring 67 when the centrifugal force caused by the rotation of the inertia wheel 50 is reduced below a predetermined extent.
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