Drill bit dismounting structure of concrete sampler

The utility model relates to the technical field of experimental coring, and discloses a drill bit dismounting structure of a concrete sampler. The drill bit dismounting structure of the concrete sampler comprises a drill rod, a drill bit, a first locking assembly and a second locking assembly. The second locking assembly comprises a first semi-ring, a second semi-ring and two clamping blocks, andthe first semi-ring and the second semi-ring are arranged on the outer side of the drill rod in a sleeving mode after being in butt joint. The two clamping blocks are oppositely arranged on the opposite inner sides of the first semi-ring and the second semi-ring respectively. And each clamping block can penetrate into the corresponding positioning groove to be clamped and matched with the corresponding annular clamping groove. The utility model discloses a drill bit dismounting structure of a concrete sampler. The drill rod and the drill bit are relatively fixed through the first locking assembly and the second locki