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The structure of jaw crusher is mainly composed of eccentric shaft, large pulley, flywheel, moving jaw, side guard plate, rear seat of elbow plate, gap adjusting screw, reset spring, fixed jaw plate and movable jaw plate, among which the elbow plate also plays a safe role. The crushing mode of jaw crusher is curved extrusion type, motor drives belt and pulley, moves the moving jaw up and down through eccentric shaft, when the moving jaw rises, the angle between the elbow plate and the moving jaw becomes larger, thus pushing the moving jaw plate close to the fixed jaw plate, at the same time, the material is squeezed, rubbed, ground and so on. When the moving jaw goes down, the angle between the elbow plate and the moving jaw becomes smaller, and the moving jaw plate leaves the fixed jaw plate under the action of pull rod and spring. At this time, the broken material is discharged from the lower mouth of the crushing cavity. As the motor continuously rotates the broken jaw as periodic crushing and discharging, the mass production can be realized.

Operating environment of jaw crusher: in the process of breaking huge stones into small stones, the first crusher is usually called "main" crusher. The longest and strongest crusher in history is the jaw crusher. When feeding a jaw crusher, the material is poured into a crushing chamber with jaw teeth from the top entrance. The jaw teeth lift the material to the wall of the chamber with great force and break it into smaller stones. The jaw tooth movement is supported by a eccentric shaft that runs through the fuselage frame. Eccentric motion is usually caused by flywheels fixed at both ends of the shaft. Spherical roller bearings are often used in flywheels and eccentric support bearings, and the working environment of bearings is very harsh. Bearings must withstand huge impact loads, erosive sewage and high temperatures. Despite the harsh working environment, jaw crushers still need to work very reliably. 

Jaw Crusher Operating principle
Jaw crusher machine uses motor as its power. Through the motor's wheels, the eccentric shaft is driven by the triangle belt and slot wheel to make the moving jaw plate move by a regulated track. Therefore, the materials in the crushing cavity ,which is composed of fixed jaw plate, moving jaw plate and side liner,can be crushed and discharged through the discharging opening.