Patent ID: 7931219
Filing Date: 2011-04-26
Classification: B02C

Abstract:
1. An anti-spin assembly in a gyratory crusher, comprising: a crushing head; an inner shell is mounted on said crushing head; a frame with a frame top part and a frame bottom part; an outer shell mounted on said frame top part; a shaft supporting the crushing head, said shaft being arranged on said frame bottom part, the outer shell defining together with the inner shell a crushing gap; and an eccentric arranged about the shaft being adapted to cause the crushing head to execute a gyratory pendulum movement with a view to crushing material that is introduced in the crushing gap; wherein the anti-spin assembly includes at least one expandable braking receptacle, which is adapted to be expanded by way of a pressure medium and which is arranged in a space between a first surface formed on a part which rotates with the crushing head and a second surface formed on a non-rotary part which is connected to the frame, the at least one expandable braking receptacle being arranged, when expanding, to engage both the first and the second surface, thereby braking the rotation of the crushing head.