Vibrating aggregate, an apparatus for processing mineral material, and a method for moving a processing device of an apparatus for processing mineral material

A processing apparatus for processing mineral material, comprising at least a processing device and a vibrating aggregate for moving the processing device, the vibrating aggregate comprising:

• a frame;
• a shaft having an axis extending in a first direction, the shaft being arranged to rotate with respect to the frame, and the shaft having an eccentric portion;
• a first element coupled to the shaft outside of the frame such that a mass centre of the first element is not on the axis of the shaft, the first element being arranged to rotate with the shaft, rotation of the shaft and the first element causing the shaft and the first element to move along a circular path;
• and
• a second element inside of the frame having (i) a first end coupled to the eccentric portion of the shaft and (ii) a free second end, the eccentric portion being disposed within the first end of the second element, the eccentric portion being rotatable relative to the first end of the second element, and the free second end of the second element being (a) configured to move along a substantially linear path in a first direction when the shaft is rotating at a constant speed, and (b) restricted by the frame from movement in a second direction, perpendicular to the first direction, and in a direction of the axis of the shaft, wherein
• a phase of the movement of the first element in relation to a phase of the movement of the free second end of the second element is adjusted such that an elliptical movement of the vibratory aggregate is generated when the shaft is rotated,
• the second element is one uniform piece, and
• when viewed from the first direction, the path of the second element is at least partly within the path of the first element.

A method for moving a processing device of a mineral material processing apparatus along an elliptical path, the method comprising:

• generating a first portion of the movement of the processing device by a first element rotatably connected to a rotatable shaft, which is arranged to rotate with respect to a frame, and moving along a circular path with the shaft when the shaft is rotating about an axis of the shaft, the first element being coupled to the shaft outside of the frame and positioned such that a centre of mass of the first element is not on the axis of the shaft;
• and
• generating a second portion of the movement of the processing device by a second element having a first end connected to an eccentric portion of the rotatable shaft inside of the frame, the rotatable shaft being disposed within the first end of the second element, and a free second end of the second element being (a) configured to move along a substantially linear path in a first direction when the shaft is rotating at a constant speed, and (b) restricted by the frame from movement in a second direction, perpendicular to the first direction, by a frame and in a direction of the axis of the shaft, wherein
• a phase of the movement of the first element in relation to a phase of the movement of the free second end of the second element is adjusted such that an elliptical movement of the vibratory aggregate is generated when the shaft is rotated,
• the second element is one uniform piece, and
• when viewed from the first direction, the path of the second element is at least partly within the path of the first element.