| 主权项 |
1. A gyratory crusher comprising:
a frame; a crushing head arranged rotatably about a substantially vertical shaft, wherein the frame includes an upper frame portion, and a lower frame portion; and a hub formed in the lower frame portion, the hub having a centralized arranged through hole with a center axis extending through said hole and the hub, the hole being arranged to cooperate with the shaft rotatably arranged in said hole, the hub being connected by a plurality of arms to the lower frame portion and including a drive ring pocket, the drive ring pocket being bounded by an inner wall element, an outer wall element of the hub and a bottom wall element, the inner wall, outer wall and bottom wall elements extending continuously around a periphery of the hub, wherein the hub includes a hub bottom end and a waist portion, the waist portion extending discontinuously around the periphery of the hub, wherein at each arm the waist portion extends from the bottom wall element of the drive ring pocket to the hub bottom end and has a height that is larger than a longitudinal height of the bottom wall element, the waist portion having a thickness in a radial direction from the center axis that is larger than a width of the drive ring pocket for the hub. |
