A quick fastening machine

Abstract Title: Fastening device driving mechanism having an annular gear and planet gear structure A fastening device， such as a nail gun， having a base 1， an impact unit 3 connected to an energy storage medium 2， and a driving mechanism 4 in the base for pushing the impact unit to compress the energy storage medium to store energy. The driving mechanism has an annular gear 41 and driving shaft 42 in the the base， a crank 43 installed on the driving shaft， a planet gear 44 rotatably installed in the upper end of the crank， and a rotatable connecting rod 45 installed on the planet gear， where the planet gear is engaged with the annular gear so that it can implement revolution against the annular gear and rotation at the upper end of the crank. A clamp shaft 46 is located in the upper end of the connecting rod for connecting the impact unit. The lower end of the driving shaft extends out of the lower end of the base and connects the device to a rotating energy release unit. The impact unit may be an impact bar and may be disengaged from the clamp shaft.