Anti-spin system for the head of a cone crusher

摘要

The anti-spin system is applied to a cone crusher having a structure (10) carrying an upper housing (20) and a vertical axle (30); an eccentric element (40) to be rotated around the vertical axle (30); and a cone head (60) disposed inside the upper housing (20) and being axially and rotatively supported on the structure (10) and radially supported around the eccentric element (40). The anti-spin system comprises a braking bush (70) carried by the cone head (60) or by the structure (10), and an annular shoe (80) carried by the other of said parts, which are pressed against each other, by action of the inertial centrifugal force acting on the cone head (60), upon “no-load” operation of the crusher, to generate a friction force opposite and superior to that generated between the cone head (60) and the eccentric element (40) and to prevent the latter from rotatively dragging the cone head (60).

主权项

1. An anti-spin system for the head of a cone crusher of the type which comprises a structure (10), in which are mounted an upper housing (20) and a vertical axle (30) having a free upper end (31); an eccentric element (40) mounted around the vertical axle (30), to be rotated by a drive mechanism (50); and a cone head (60), disposed in the interior of the upper housing (20) and being axially and rotatively supported on the structure (10) above the free upper end (31) of the vertical axle (30) and radially and rotatively supported around the eccentric element (40),
wherein said cone head (60) has a mass center, said anti-spin system further comprising a braking bush (70), carried by one of the parts defined by the cone head (60) and by the structure (10) and an annular shoe (80) carried by the other of said parts, the braking bush (70) and the annular shoe (80) being pressed against each other, by action of the inertial centrifugal force (T) acting on the mass center of the cone head (60) upon “no-load” operation of the crusher, so as to generate a braking friction force (R1) opposite to a dragging friction force (R2) generated between the cone head (60) and the eccentric element (40); characterized in that said braking bush (70) and annular shoe (80 lie an axial distance (A) from the mass center of the cone head (60) smaller than an axial distance (B) between said mass center and the region in which acts the dragging friction force (R2) in the minimum eccentricity region of the eccentric element (40), said braking friction force (R2) being superior to the dragging friction force (R2) preventing the cone head (60) from being rotationally dragged by the eccentric element (40).