Nail gun

A nail gun comprising:

• a housing;
• a power output portion arranged in the housing;
• a magazine configured to provide fasteners for the nail gun;
• a muzzle configured to receive a driven fastener;
• a driver assembly comprising a driver member and a base that is in mechanical communication with the driver member, wherein the driver member extends along a first axis in a longitudinal direction;
• and
• a lifting assembly configured to drive the driver member to move to drive the base to move from a bottom-dead-center position to a top-dead-center position, wherein:
• the lifting assembly comprises a driving wheel that is driven by the power output portion and rotates around a second axis, and a plurality of fitting units is arranged on a periphery of the driving wheel at intervals;
• a plurality of engagement units is arranged on the driver member along a direction of the first axis;
• the plurality of fitting units is configured to alternately engage with respective corresponding engagement units under an action of the driving wheel;
• at least one of the plurality of fitting units is a rolling portion, the rolling portion being capable of rotating around an axis of the rolling portion, the rolling portion is movably engaged with a corresponding engagement unit;
• and
• an engagement unit closest to the base among the plurality of engagement units is defined as a first engagement unit, and a fitting unit engaging with the first engagement unit is a first rolling portion, and the first rolling portion is non-cylindrical and has a main body portion and a plurality of bump portions extending radially outward from the main body portion.