B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
241/34
B02C 2/02 (2006.01) B02C 2/04 (2006.01)
Patent
CA 1063080
ABSTRACT OF THE DISCLOSURE Apparatus for limiting the rotation of the head of a roller bearing type gyratory crusher. The crusher includes a frame having a bowl and a head cooperable therewith during crushing action. An eccentric is rotatably mounted on the frame and a head is Mounted on the eccentric with roller bearings between the eccentric and the head. When the crusher is operating empty the frictional drag on the bearings will cause the head to rotate with the eccentric. During crushing opera- tions, this frictional drag is overcome by the material in the crusher and the crushing forces will tend to rotate the head in a direction opposite to the rotational direction of the eccentric. Apparatus is provided for reducing the speed of rotation of the head in the direction of the rotation of the eccentric while permitting free rotation of the head in the other direction. This apparatus includes a ring gear fixed to the head, an inner gear rotatably mounted on the frame or main shaft extension and a one-way clutch connecting the inner gear to the frame. The inner gear has at least one less tooth than the ring gear. In the direction of rotation of the eccentric, the inner gear is fixed to the frame, and the ring gear and thus the head rotate about the inner gear. The ratio of number of gear teeth on the inner gear to the number of teeth on the ring gear causes the head to rotate at a lower speed than the eccentric. In the other direction of rotation, the inner gear is free to rotate about the main shaft extension, and thus the head is freely rotatable relative to the frame and the eccentric.
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