Patent ID: 7614573

Claim:
A jaw crusher, comprising: a) a moving base, installed to a machine through an eccentric shaft, and having a moving die installed onto a crushing surface; b) a fixed base, fixed onto the machine, and having a fixed die disposed at a position corresponding to the moving die of the moving base; c) a crush travel adjusting mechanism, for pivotally coupling the top of a crush travel adjusting base to the machine, and an axle of the crush travel adjusting base being pivotally coupled to the machine through an eccentric sleeve, and a toggle plate being disposed separately on both ends and between the bottom of the crush travel adjusting base and the moving base, and a pull rod of the moving base having a compression spring being provided for tightly pressing front and rear ends of the toggle plate; and d) an automatic crush gap adjusting mechanism having at least one triangular wedge-shaped lump at a position adjusting base of the machine, and a stop plate installed between a steel slotted member disposed adjacent the stop plate and a middle section of the crush travel adjusting base, and using a pull rod of the adjusting base having a compression spring to tightly press front and rear ends of the stop plate to control a position of the triangular wedge-shaped lump and thereby change the position of the steel slotted member to set a crush gap between the moving die and the fixed die.