Cutting tool for digging trenches, and enabling the cutter head to be changed quickly

A cutting tool for digging vertical trenches, the tool comprising:

• a jib;
• a cutter structure suspended from the jib via a cable;
• a plurality of cutter members disposed on at least one cylindrical surface;
• a motor assembly;
• a power supply for powering said motor assembly;
• releasable retention means for securing at least a portion of the motor assembly having the cutter members mounted thereto to a bottom end of the structure;
• relative positioning means between the structure and the motor assembly;
• and
• means for connecting the power supply to the motor assembly;
• suction means secured to the structure, a separable suction nozzle associated with at least the portion of the motor assembly having the cutter members fixed thereon, and means for releasably connecting these two elements;
• wherein at least a portion of the motor assembly with the cutter members can easily be separated from the structure of the machine.

A cutting tool for digging vertical trenches, the tool comprising:

• a jib;
• a cutter structure suspended from the jib via a cable;
• a plurality of cutter members disposed on at least one cylindrical surface;
• a motor assembly;
• a power supply for powering said motor assembly;
• releasable retention means for securing at least a portion of the motor assembly having the cutter members mounted thereto to a bottom end of the structure;
• relative positioning means between the structure and the motor assembly;
• and
• means for connecting the power supply means to the motor assembly;
• wherein the releasable retention means include a first plate having at least the portion of the motor assembly that supports the cutter members mounted on the bottom face thereof;
• and
• wherein the bottom end of the structure further includes a second plate which comes to bear on the first plate associated at least with said portion of the motor assembly that supports the cutter members;
• wherein at least a portion of the motor assembly with the cutter members is easily separated from the structure of the machine.