This utility model discloses a
nonlinear stiffness vibration reduction device, including a
vibration damper assembly and a
nonlinear vibration damping frame. The
nonlinear vibration damping frame includes several double-link mechanisms hinged to both ends of the
vibration damper assembly. The hinge joints of adjacent double-link mechanisms are connected by transverse springs. The
vibration damper assembly includes a vibration
damper and vibration damping springs disposed outside the vibration
damper. A bearing top plate, a force transmission plate, and a base vibration plate are sequentially arranged along the vertical direction of the vibration
damper, all connected to the ends of the corresponding vibration damping springs via spring seats. The two ends of the double-link mechanisms are respectively hinged to the bearing top plate and the base vibration plate. A transmission short rod connected to the double-link mechanism is provided on the force transmission plate, forming a
rhomboid support structure through the transmission short rod and the double-link mechanism. This utility model has a stable structure, strong anti-tilting ability, and good
impact resistance, improving the support reliability and vibration reduction effect of the device in complex vibration environments.