The invention discloses a variable-stiffness shock insulation and absorption limiting
damper, and relates to the field of dampers. The variable-stiffness shock insulation and absorption limiting
damper comprises a
piston sleeve provided with a
piston cavity and a
piston movably arranged in the piston sleeve, the piston is connected with a
piston rod penetrating out of the piston sleeve, the end, away from the
piston rod, of the piston sleeve is connected with a sleeve supporting rod, and the end, away from the
piston rod, of the piston cavity is provided with a variable-
diameter cavity. The inner
diameter of the variable-
diameter cavity is gradually reduced along the direction away from the piston rod, and the end, facing the variable-diameter cavity, of the piston is connected with a plurality of
extrusion push petals arranged at intervals in the circumferential direction of the piston. When the piston moves along the variable-diameter cavity, the inner wall of the variable-diameter cavity synchronously pushes or stops pushing all the
extrusion pushing petals, and all the
extrusion pushing petals synchronously rotate in the direction close to or away from the axis of the piston sleeve. According to the variable-stiffness shock insulation and absorption limiting
damper, the variable-
damping function that the damping force is increased along with the increase of displacement is achieved by arranging the variable-diameter cavity to extrude all the extrusion push petals connected with the piston, and the variable-stiffness shock insulation and absorption limiting damper has the advantages of being simple in structure, low in cost and good in shock
absorption effect.