Cone crushing machine and crushing method using such a machine

A crushing machine (1), comprising:

• a frame (2);
• a tank (3) forming an internal grinding track (3a), the tank being mounted on a chassis (4) which is movable in translation in at least a plane transverse with respect to the frame (2);
• a cone (5) forming an external grinding track (5a) and placed inside the tank (3);
• and
• a device (7) for vibrating the tank (3) with respect to the frame (2) in a transverse plane, so that the material is crushed between the internal grinding track (3a) and the external grinding track (5a) through the relative movement of the tank (3) with respect to the cone (5),
• wherein the device (7) for vibrating the tank (3) comprises at least two vibrators which are mounted on the chassis (4), each vibrator of the at least two vibrators being rotated about a longitudinal axis of the chassis by a motor (10), each motor (10) driving a vibrator of the at least two vibrators with which the motor is associated independently from one another,
• the device (7) for vibrating the tank (3) further comprising a system (11) for controlling the motors (10), and a system (12) for measuring a relative phase shift angle between the at least two vibrators, so that the vibration device (7) can take any of at least three positions:
• a zero position, in which the phase shift angle between the at least two vibrators is such that the vibrations of the tank (3) are of minimal amplitude,
• a maximum position, in which the phase shift angle between the at least two vibrators is zero, so that the vibrations of the tank (3) are of maximum amplitude,
• at least one intermediate position, in which the phase shift angle between the at least two vibrators is such that the vibrations of the tank are of intermediate amplitude between the maximum amplitude and the minimum amplitude,
• wherein the control system (11) is configured to switch the vibration device from one position of the at least three positions to an other of the at least three positions while maintaining rotation of the vibrators, and
• wherein, when the vibrators are rotated, the tank is vibrated and describes a circular translation movement in said transverse plane.