Jaw Crusher have invented early in 1858 by American Blake, named jaw crusher, Prior to this, in 1806 have appeared roll crusher driven by a steam engine, In 1878 the United States has developed a gyratory crusher with continuous crushing action, the production efficiency is higher than the jaw crusher equipment with intermittent movement of the broken. In 1895, the United States, William invention impact crusher with lower energy, Modern crusher machinery have been created based on the gradual improvement and promotion of the machinery which driven by steam engine and the electric motor power, such as impact crusher , cone crusher and so on.
The first advent of jaw crusher in the world which structure is in the form of double toggle plate, To the 1980s, the feeding size of the a large jaw crusher with capacity of 800 tons per hour has reached to about 1800 mm, Commonly, jaw crusher has double toggle plate and single toggle plate . The double one moving jaw stack for simple swing arc only while working , so called simple swing jaw crusher , while the single one doing up and down movement when moving jaw stack for simple swing arc, so called complex swing jaw crusher.
In our country, the technical of jaw crusher has a big different with different manufacturers, The level of some manufacturers of jaw crusher was close to the world advanced level, while most of the manufacturers have a big gap with the world advanced level, Welded frame is the long-term development of the jaw crusher, due to the frame of jaw crusher take up a large proportion of the whole mass ( 50% casting frame , welded frame , 30% ) . Many foreign manufacturers of jaw crusher are using welded frame, even jaw stock is also using welded structure too, while there are many poorly designed frame structure among domestic jaw crusher without thinking about the actual force in crushing situation, In this case, the domestic price of jaw crusher will greatly reduced with its quality.
The basic factors of jaw crusher has the best performance is required jaw stock has the best motion characteristics, Therefore, Optimize design of the mechanism of jaw crusher is important to jaw crusher have the best performance, Designers are required to optimize the design of different jaw crusher according to optimize the institutions on a variety of modules. Obtain us to get the best characteristics of jaw stock. Practical results show that after the optimization design, there is a significant improvement of crusher performance. but optimize design of jaw crusher haven’t been widely applied yet.
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