Jaw crusher is a famous mining machinery machine widely used
mining, road, railway, chemical industry, etc. It was mainly
make up by six parts. The first part is rack and it is a walls
rigid frame with the top and lower surface is open. Used for
supporting partiality axis and to bear the reaction of crushing
materials. Generally inblock cast by cast steel. Small machine
can also used high quality iron instead of cast steel. But the
rack of large machine need cast subsection, the process is more
complex. The second part is jaw plate and side guard plate,
fixed jaws and dynamic jaw were all made up by jaw bed and jaw
plate. Jaw plate is working part, fixed in the jaw bed by bolts
and wedge iron .The jaw bed of fixed jaw is the front wall of
rack, the jaw bed of dynamic jaw was hanging in the axis. So the
all need enough intensity and stiffness to sustain the
counterforce of crushing . The thired part of jaw crusher is
adjusting device , adjusting device divided into wedge block
type, plate type and the hydrauli