| 摘要 |
Improvements are disclosed for a jaw crusher having converging and opposed jaws defining a space for passage of material to be crushed. An improved assembly for imparting oscillatory vibration to at least one jaw comprises multiple eccentric means arranged in vertically spaced apart relation and synchronously operated by split drive means for producing more uniform and consistent operation of the crusher under different load conditions. Another improvement comprises at least two eccentric masses arranged in laterally spaced apart relation on the one jaw by separate shafts which are independently mounted by separate bearings whereby the size of both the eccentric masses and bearings is proportionately reduced to permit crusher operation at increased rates of rotation. A further improvement comprises an elongated resilient member mounted on the frame structure with a reaction member connected to the one jaw and surrounding the elongated resilient member for permitting oscillatory movement of the one jaw while limiting its travel in all directions on the frame structure. Preferably, both jaws are similarly constructed and mounted on the frame structure.
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