Astec Industries, Inc.

James C Bremer

Herbert E Jakob

Matthew B Haven

Edward H Breiling

A gyratory crusher includes an anti-spin mechanism which is coupled to a lower end of a main shaft of the crusher and which prevents the main shaft and associated crushing head from spinning when the crusher is not subject to a crushing load. The anti-spin mechanism includes 1) a hydraulic brake, and 2) a gear train which couples the main shaft to the hydraulic brake so as to drive the hydraulic brake to rotate faster than the main shaft while at the same time permitting relative sliding motion between the main shaft and the hydraulic brake without unduly increasing the complexity or height of the crusher. The hydraulic brake is supercharged so as to respond immediately to a tendency of the main shaft to spin. As a result, only relatively low braking forces are required to prevent spinning.

Anti-spin mechanism for gyratory crusher

A gyratory crusher includes an anti-spin mechanism which couples a lower end of the eccentric shaft of the crusher to the stationary frame of the crusher so as to prevent the eccentric shaft and associated crushing head from spinning when the crusher is not subject to a crushing load. The anti-spin mechanism includes 1) a gear train preferably formed from two sets of intermeshing gears, and 2) a torque limiter which is coupled to the gear train and which releases upon the imposition of a crushing load on the crusher so as to permit relatively slow rotation of the eccentric and crushing head counter to the direction of rotation of the main drive gear or bull gear.

Apparatus for adjusting a conical concave crushing bowl of a gyrasphere crasher relative to a conical convex crashing head of the gyrasphere crasher includes a plurality of lugs connected to the conical concave crashing bowl; a bushing i) connected to the conical convex crashing head and ii) defining a bushing axis; and ii) defining a bushing axis a swivel bracket i) circumscribing an elongated trans cylinder release stud ii) defining a swivel axis that is coaxial with the bushing axis iii) adjacent the elongated bushing and iv) freely radially repositionable with regard to the swivel axis; and a tensioner having a proximal end attached to the swivel bracket and a distal end removably attached to one of the plurality of lugs. A method of adjusting the conical concave crashing bowl relative to the conical convex crashing head includes shortening the tensioner so as to rotate the conical concave crashing bowl relative to the conical convex crushing head.

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Slinger, WI, United States of America

James C Bremer