Anti-impact device and working method thereof

A anti-impact device, comprising a first connector, an upper outer cylinder, a lower outer cylinder and a second connector which are sequentially connected, wherein the first connector is fixedly connected to the upper outer cylinder, the second connector is fixedly connected to the lower outer cylinder, and a top of the lower outer cylinder is sleeved with the upper outer cylinder to be movably connected to the upper outer cylinder;

• an aluminum honeycomb and a magnetorheological buffer outer cylinder are arranged inside the lower outer cylinder, an upper end and a lower end of the magnetorheological buffer outer cylinder are packaged by means of an upper end cover and a lower end cover respectively, the aluminum honeycomb is arranged at a bottom of the lower end cover, a piston rod is arranged inside the magnetorheological buffer outer cylinder, a top end of the piston rod extends out of the upper end cover and is connected to a collision head, and the piston rod between the collision head and the upper end cover is sleeved with a return spring;
• and an electromagnetic coil is wound around the piston rod, a damping piston is arranged on a lower part of the piston rod, a damping hole is provided on the damping piston, a guide disc is arranged at a bottom end of the damping piston and makes contact with an inner wall of the magnetorheological buffer outer cylinder, and a lower part of the guide disc is filled with a magnetorheological fluid.