The upper end of the movable raft is directly suspended on the eccentric shaft, and the connecting rod as the crank connecting rod mechanism is directly driven by the eccentricity of the eccentric shaft, and the lower end of the movable cymbal is hinged to the thrust plate and supported on the rear wall of the frame. When the eccentric shaft rotates, the trajectory of each point on the moving cymbal is from the circumferential line of the suspension point (the radius is equal to the eccentricity), and gradually becomes elliptical downward. The lower the part, the more the ellipse is biased until the lower part and the thrust plate The connection point track is a circular line. Because the movement trajectory of each point on the moving cymbal is complicated, it is called a complex oscillating jaw crusher.
Compared with the simple pendulum type, the compound pendulum jaw crusher has the advantages of lighter weight, fewer components, more compact structure, better filling in the crushing chamber, uniform crushing of the loaded material block, and lowering of the lower end of the moving jaw. Mandatory introduction of finished product discharge, so the productivity is higher, 20-30% higher than the productivity of the simple pendulum jaw crusher of the same specification; the material block has a large up and down tumble motion in the lower part of the moving jaw, which is easy to be in the shape of a cube. Unloading reduces the sheet-like composition as in the simple pendulum product, and the product quality is good.