Patent ID: 6386794
Filing Date: 2002-05-14
Classification: B06B,E01C,E02D

Abstract:
A vibrating drum for a soil tamping machine comprising:a tubular skirt adapted to be arranged in abutment against soil to be tamped; one or more structural elements radially fastened inside said tubular skirt; a central shaft in a through arrangement into said one or more structural elements, supported by rolling means; flanging means adapted to make said tubular skirt integral with a frame of said tamping machine; motorization means comprising at least a first hydraulic motor adapted to place said tubular skirt into rotation and vibration means adapted to make said tubular skirt vibrate, wherein said vibration means comprises at least a second hydraulic motor coupled to an end of said central shaft and a receptacle fastened to said central shaft which delimits a chamber for containing a liquid in which may be at least partly immersed at least one draught pipe connected through at least one duct to a hydraulic circuit, said hydraulic circuit comprising pumping means adapted to change an amount of liquid contained in said chamber so as to change a weight of liquid therein and thereby change the vibration amplitude of said drum.