In the crushing process, the moving jaw of a compound pendulum jaw crusher exhibits a periodic reciprocating motion, with slight differences in the movement trajectories between the feed inlet and discharge outlet. At the feed inlet, the moving jaw’s trajectory approximates a circle, while at the discharge outlet, it follows an elliptical path. This motion pattern improves the equipment’s crushing efficiency, and the near-linear trajectory at the discharge outlet facilitates the removal of crushed material. However, this motion also has drawbacks. The pronounced vertical movement at the discharge outlet can lead to over-crushing and suboptimal material shape. Therefore, when purchasing a jaw crusher, users should weigh the advantages and disadvantages, considering various factors in conjunction with their actual production needs to select the appropriate crusher.

Extensive research by our company’s crushing equipment experts has revealed that the speed and acceleration of the feed inlet and discharge outlet of the compound pendulum jaw crusher also exhibit periodic variations, reaching two maximum and minimum values ​​within a single cycle, distributed approximately at 67°, 160°, 254°, and 340° of eccentric shaft rotation. Specifically, the compound pendulum jaw crusher performs crushing motion when the eccentric shaft rotates between 67° and 254°; when the eccentric shaft rotates to other positions, the moving jaw performs a swinging motion.