Patent ID: 8127974
Filing Date: 2012-03-06
Classification: B25C

Abstract:
1. An electrical motor driven nail gun comprising: an electric drive motor electrically connected to a power source, a fastener feeding device with a magazine for feeding fasteners, and a trigger connected to a control unit for activating a fastener driving action; a rotational motion speed reduction drive assembly further comprising a pinion gear fixed to an output shaft of the motor, and a flywheel with a rack gear formed on an inward facing peripheral surface and engaging the pinion gear; a linear motion conversion linkage, further comprising a slot board having an arcuate slot with an axis in a central portion, a driving block slidingly mounted in said arcuate slot, a pitman with a proximal end portion pivotably connected to the driving block, and an elongate drive unit having a first end portion and an opposite second end portion with the first end portion pivotably connected to a distal end portion of the pitman; a clutching mechanism mounted to the flywheel, having a clutch bar engaging the driving block when the trigger is activated to drive a fastener, and a disengage block for disengaging the clutch bar from the driving block on completion of the driving action; and a long board having a first end portion and an opposite second end portion, with a longitudinal long slot in which the drive unit is disposed with linear sliding motion, and with an elastic member connecting the first end portion of the drive unit to the first end portion of the long board; wherein fasteners are delivered by the feeding device to the second end portion of the long board where the fasteners are driven one-by-one by the second end portion of the drive unit, the rotating energy of the flywheel being converted by the linkage mechanism to lateral movement of the drive unit for driving the fasteners.