Chain wheel type ground drill with drill bit convenient to replace

The chain wheel type ground auger comprises a sliding block, a gear box and a sliding frame, the top of the sliding frame is connected with the gear box, the back face of the sliding frame is connected with the sliding block, a transmission rod is connected into the sliding block in a penetrating mode, the top and the bottom of the transmission rod are both connected with installation plates through bearing seats, and the installation plates are connected with the transmission rod through bearing seats. A frame is connected to the back face of the mounting plate, and a speed reducer body is mounted at the top of the frame. Through the arrangement of the sliding block, the speed reducer body, the transmission rod, the sliding frame, the speed reducer body, the driving gear, the connecting gear and the transmission chain, under the auxiliary action of the driving gear and the connecting gear, the movement of the limiting frame can drive the gear box to move up and down, and then the drilling work of the bottom