Conical damping hole type buffer for undercarriage of passenger plane

The invention provides a conical damping hole type buffer for an undercarriage of a passenger plane. The conical damping hole type buffer comprises an external fastening connection assembly, an internal movable assembly and a separation part, wherein the external fastening connection assembly comprises an outer actuating cylinder, a travel plunger and a sealing device structure; the internal movable assembly comprises an inner actuating cylinder and a damping piston head; the separation part comprises a damping braking valve and an air chamber partition plate piston; a conical damping hole A is formed in the center at the bottom of the travel plunger; and a plurality of conical damping holes B are formed on the outer edge of the damping piston head uniformly along the axial direction. In the conical damping hole type buffer for the undercarriage of the passenger plane, the optimal buffer full-travel variable damping working condition is realized by designing conical angles of the conical damping holes and an