Rotary digging drill and amphibious tunnel construction robot using same

An amphibious tunnel construction robot, comprising:

• a rotary digging drill, wherein the rotary digging drill comprises:
• three disk drills arranged in ascending order of diameter, each with a cavity therein,
• wherein each disk drill comprises two circular ring seats arranged side by side, multiple toothed digging buckets disposed at peripheries of the two circular ring seats, and ring gear racks respectively disposed on inner sides of the two circular ring seats;
• and a periphery of each toothed digging bucket is provided with steel teeth and each toothed digging bucket has openings in different sizes at two ends;
• and
• wherein adjacent ones of the disk drills have the toothed digging buckets facing opposite directions, and the disk drills all rotate in a direction facing a large opening, enabling adjacent two of the three disk drills to rotate in opposite directions;
• and the rotary digging drill further comprises:
• three disk drill supports that match the three disk drills in quantity and are configured to support and drive the three disk drills, each two of the three disk drill supports being connected to each other;
• and
• a guide drill having a head end disposed at a front end of the disk drill with a minimum diameter and having a tail end running through the three disk drills;
• and
• wherein the robot further comprises a roadheader chassis portion, a support vehicle chassis portion connected to the roadheader chassis portion via a docking mechanism, and a support vehicle main body portion disposed on the support vehicle chassis portion;
• wherein the roadheader chassis portion comprises a roadheader chassis mechanism configured to fix and bear the rotary digging drill, the roadheader chassis mechanism comprises a roadheader chassis support and two propellers that are disposed on two sides of the roadheader chassis support and face different directions, and a soil conveyor belt is disposed on a side above the roadheader chassis support;
• and
• wherein an end of the roadheader chassis mechanism provided with the soil conveyor belt extends into the cavities of the three disk drills, and the soil conveyor belt is powered by a hydraulic motor to transport soil excavated by the rotary digging drill to rear.