Heat dissipating device and electric nail gun having the same

A heat dissipating device adapted to be mounted in an electric nail gun, the electric nail gun including a main frame, a flywheel that is mounted to the main frame and that is rotatable about an axis, a first pulley that is rotatably mounted to the main frame and that is spaced apart from the flywheel, and a transmission belt that is trained on the first pulley, said heat dissipating device comprising:

• a second pulley adapted to be connected coaxially and co-rotatably to the flywheel, and adapted to be trained by the transmission belt, such that said second pulley is adapted to be driven rotatably by the first pulley to thereby drive rotation of the flywheel about the axis;
• a weight disc adapted to be connected coaxially and co-rotatably to said second pulley;
• and
• a heat dissipating member connected coaxially and co-rotatably to said weight disc, and including a reference surface normal to the axis and a plurality of fan blades, each of said fan blades extending perpendicularly from said reference surface in a direction of the axis away from said weight disc such that, during co-rotation of the flywheel, said weight disc and said heat dissipating member, said fan blades create a flow of air for cooling the flywheel.