US 5,312,053 A · Cone crusher with adjustable stroke

Abstract

A gyratory crusher includes a bowl assembly with a concave crushing surface and a crusher head of conical shape which extends into the concave portion of the bowl assembly. A central crusher axis extends centrally through the bowl assembly. The crusher head is mounted with a central head axis at an angular deviation with respect to the central crusher axis to intersect the crusher axis at an apex. Crushing action is obtained by driving the crusher head to gyrate the angular offset of its central axis about the central crusher axis. The gyratory crusher has an adjustable stroke of gyration. Adjustability of the stroke is obtained by controllably varying the amount of angular deviation by which the crusher head gyrates about the central crusher axis. The amount of angular deviation is controlled by an eccentric support bearing which gyrates a guide shaft of the crusher head about the crusher axis and which is adjustably mounted to move toward and away from the apex of gyration without also changing the position of the crusher head with respect to the apex.

Claims16

Dependent claims

A method of crushing materials with a gyratory crusher, the gyratory crusher including a crusher bowl centered on a central vertical crusher axis, a crusher head disposed below the crusher bowl, and a gyratory drive including a bearing for retaining the crusher head at a predetermined angle of deviation with respect to the central vertical crusher axis for gyratory motion of the crusher head at a defined angle of deviation about the central vertical crusher axis, the method comprising the preparatory steps of:

adjusting the position of the bearing within the gyratory crusher and thereby adjusting the defined angle of deviation of the crusher head and a stroke length of gyration of the crusher head of the gyratory crusher;
and
verifying that a minimum desirable opening exists at a closed side between the crusher bowl and the crusher head, and adjusting the opening at the closed side to a minimum desired open setting if the minimum desirable opening does not exist after adjusting the stroke length of gyration of the gyratory crusher.

A gyratory crusher comprising:

a crusher frame assembly having a central vertical axis and including a support structure for supporting a crusher head along the central vertical axis;
a crusher head supported by the frame assembly along the central vertical axis, the crusher head including a guide shaft extending downward from the crusher head into the frame assembly;
an eccentric drive member mounted within the frame assembly concentric with the central vertical axis, the frame assembly including bearings for rotatably supporting the eccentric drive member to rotate on the central vertical axis, the eccentric drive member including an eccentric bearing having a bore displaced from the central vertical axis for retaining the guide shaft of the crusher head at an angle of deviation with respect to the central vertical axis;
a drive mechanism engaging the eccentric drive member to rotate the eccentric drive member and to gyrate the guide shaft with respect to the central vertical axis;
and
a positioning mechanism coupled to the eccentric drive member, the positioning mechanism supported with respect to the crusher frame assembly and including a drive link coupled to the eccentric drive member to reposition the eccentric bearing and change the angle of deviation of the guide shaft with respect to the central vertical axis, whereby a stroke length of gyration of the crusher head changes.

3 more elements

Dependencies are inferred from the claim text.

Cone crusher with adjustable stroke

Life of this patent

Cone crusher with adjustable stroke

Life of this patent

Abstract

Claims16