The crusher body is installed on the vibration isolation device. The working mechanism of the basic combustion engine is composed of a crushing cone (inner cone) and an outer cone. Both cone working surfaces are embedded with protective lining plates, and the surface forms a crushing chamber that gradually shrinks towards the direction of ore discharge. On the crushing cone shaft, an unbalanced vibration exciter is installed through bearings, and the electric motor drives the vibration exciter to rotate through a V-belt transmission system and a flexible coupling. When the exciter rotates, centrifugal force is generated, forcing the broken cone supported on a spherical support to swing around the center of the ball. If there is no broken material in the crushing chamber, the crushing cone rolls along the inner surface of the outer cone without gaps. If there is material in the crushing chamber, it rolls repeatedly through the material, and at the same time, there is an impact with the change of material layer thickness, thus crushing the material. Crushed products are discharged from the discharge port, and the size of the discharge port can be adjusted by adjusting the ring. Under working conditions, the resistance of the crushed material along the crushing chamber is uneven, which can cause changes in the amplitude of the crushing cone. When the crushing chamber falls into an unbreakable object, the crushing cone will temporarily stop moving, but the unbalanced vibration exciter will continue to rotate, so there will be no damage to the transmission system. The motion state of the inertial cone crusher The body of the inertial cone crusher is not directly fixed on the foundation, but is installed on an elastic support. Its motion state is complex. Generally, it has ten degrees of freedom. The body has six degrees of freedom: three rotational degrees of freedom and three translational degrees of freedom. The crushing cone has 3 rotational degrees of freedom relative to the body. The exciter has 1 rotational degree of freedom relative to the crushing cone. The motion of an inertial crusher can be described by a differential equation system, but solving this equation is very complex. For crushers, the most important thing is the mutual movement between the crushing bodies, that is, the movement of the breaking cone relative to the outer cone. There is no rigid connection between the crushing cone and the motor, allowing for spatial swing motion. Its position relative to the body can be determined by the precession angle, rotation angle, and nutation angle. Due to the structural characteristics of the crushing cone support device and the lack of rigid connection between the crushing cone and the transmission component, the crushing cone not only rotates around the centerline of the crusher, but also rotates around its own axis. At the same time, due to the uneven distribution of the material layer in the crushing chamber, the particle size of the material varies, and the movement of the crushing cone during rolling along the material layer is also unstable. Every rolling cycle is accompanied by strong vibration. Therefore, the motion of the crushing cone is composed of the following three rotational movements. Progressive motion - the crushing cone rotates around the centerline of the crusher; Autorotation motion - the broken cone rotates around its own axis, while nutation motion - the broken cone rotates around its pitch line. At this point, it not only performs precession and rotation movements, but also nutation movements - it has 30 degrees of freedom relative to the body, and its position relative to the body needs to be determined using three parameter variables. Due to the uneven distribution of materials and particle size in the crushing chamber, the unstable rolling of the crushing cone along the material layer is accompanied by strong vibration every rolling cycle. At this point, P i constantly changes, causing nutation motion when the cone is broken. The existence of nutation motion of the cone is a significant difference in kinematics between inertial cone crushers and eccentric circular crushers. In an inertial cone crusher, due to the lack of rigid connection between the crushing cone and the motor, the amplitude of the crushing cone, i.e. the nutation angle of the crushing cone, is not limited by the transmission system and can vary. Its magnitude depends on the balance between the compressive resistance of the material layer and the crushing force. When the crusher is first started, the oscillation frequency of the crusher is small, the crushing force is small, and the amplitude angle is small. Therefore, the starting torque is also small, and starting with load will not damage the machine. Therefore, the inertia cone crusher has the advantage of being able to start and stop with load. The oscillation frequency of the inertia cone crusher's crushing cone is much higher than that of the eccentric cone crusher's crushing cone. Therefore, during the crushing process, the number of times the material is crushed in the crushing chamber is much higher than that of the eccentric cone crusher. The inertia cone crusher has nutation motion, and the crushing cone is accompanied by more than 100 vibrations every time it rolls along the material layer. This additional strong pulse vibration enhances the excitation effect of crushing, which is also an important reason why its crushing ratio is much higher than that of an eccentric cone crusher.