Patent ID: 6915721

Claim:
An electrical ratchet wrench comprising: a body composed of two shells each having an outer side and an inner side; a motor received in the body and having an output shaft with a pinion; a battery set detachably received in the body and electrically connected to the motor; a switch electrically connected between the motor and the battery set; a planet gear assembly received in the body and comprising a rotating base rotatably received in the body and having a first side and a second side; a stub protruding from the first side and having a distal end and an engaging hole defined in the distal end; multiple planet gears rotatably attached on the second side of the rotating base and engaging with the pinion on the output shaft of the motor; and a stationary collar securely held in the body and having an outer surface and an inner gear engaging with the planet gears; a connecting collar with an inner surface attached to one end of the body and securely holding the stationary collar in the connecting collar; a head attached to the connecting collar; and a ratcheting device received in the head for driving a fastener to rotate and having a driven shaft extending into and engaging with the engaging hole in the stub on the rotating base.