A CUTTING TOOL FOR DIGGING TRENCHES, AND ENABLING THE CUTTER HEAD TO BE CHANGED QUICKLY

摘要

The invention relates to a cutting tool for digging vertical trenches, the tool comprisincl: .cndot. a.jib (B) having a cutter structure (34; C) suspended therefrom via a cable; .cndot. a plurality of cutter members (18) disposed on at least one cylindrical surface; a motor assembly (12); and power supply means (46) for powering said motor assembly (12). The tool is characterized in that it further comprises: .cndot. releasable retention means (22; 44) for securing at least a portion of the motor assembly (12) having the cutter members (18) mounted thereto to the bottom end of the structure (34); .cndot. relative positioning means between the structure (34) and the motor assembly (12); and .cndot. means for connecting the power supply means (46) to the motor assembly (12); whereby at least a portion of the motor assembly (12) with the cutter members (18) can easily be separated from the structure (34) of the machine.