Excavation tool for making diaphragms and related excavation equipment

An excavation tool for making ground excavations for panels and diaphragms, said excavations containing excavation fluid or stabilizing mud during execution of the excavations, said excavation tool being configured for immersing in the excavation fluid or stabilizing mud during execution of the excavations;

• the excavation tool comprising:
• at least one rotary excavation drum;
• at least one frame, adapted to support said at least one excavation drum;
• at least one suction pump, adapted for suction of the excavation fluid or stabilizing mud and detritus present in the excavation fluid or stabilizing mud;
• at least one brushless electric motor, adapted to put in rotation said at least one excavation drum;
• at least one mechanical reducer, operationally connected to said at least one brushless electric motor and said at least one excavation drum;
• said at least one brushless electric motor being installed in said frame and being coaxial to said at least one excavation drum;
• said at least one mechanical reducer coaxial to said at least one brushless electric motor and said at least one excavation drum;
• said at least one mechanical reducer being adapted to transfer rotary motion from said at least one brushless electric motor to said at least one excavation drum.