| 摘要 |
<p>The inventions realizes a vibrating drum (1) for soil tamping machines, comprising a cylindrical tubular skirt (2) adapted to be arranged in abutment against the soil (S) to be tamped, to which is associated a first hydraulic motor (8) which place it into rotation around a central shaft (5) to move it forward and vibration means adapted to make it vibrate during rotation. The vibration means comprises a second hydraulic motor (11) coupled to an end of the central shaft (5) and a receptacle (14; 26, 28) fastened to the central shaft (5) which delimits a chamber (13; 25, 27) containing a liquid in which is partly immersed a draught pipe (16; 29, 30) connected to a hydraulic circuit (18; 34) external to the tubular skirt (2), comprising pumping means (19; 36) adapted to change the amount of the liquid contained into the chamber (13; 25, 27) so as to change the vibration amplitude of the drum (1) during rotation. <IMAGE></p> |
