3results about How to "Reduce dynamic stiffness" patented technology

The application provides a hydraulic bushing and a vehicle, and the hydraulic bushing comprises an outer tube, an inner tube and an elastic body connected between the outer tube and the inner tube, a cavity is formed between the elastic body and the outer tube, and a limiting structure abutting against the outer tube is arranged in the cavity; the limiting structure has two limiting blocks extending to the two sides of the elastic body, respectively, two liquid chambers are formed between the two limiting blocks and the elastic body, respectively, and a flow channel communicating the two liquid chambers is arranged on the limiting structure. The elastic body has a blocking structure arranged between the two liquid chambers, and the blocking structure has blocking blocks arranged corresponding to the two liquid chambers; when the pressure of damping liquid in one of the liquid chambers is greater than a preset threshold value, the corresponding blocking block can be deformed by extrusion, so that the damping liquid passes through the blocking block and flows to the other liquid chamber. The hydraulic bushing changes the fixed characteristics of the traditional bushing damping, and through the arrangement of the limiting structure and the blocking structure, the vehicle handling and comfort performance can be improved.

The present application belongs to the field of rail transit equipment technology, and provides a multi-stage damping spring floating slab track bed and a regulating method, comprising a floating slab, a lower-mounted vibration isolator, a side-mounted vibration isolator, a first stiffness adjusting device, a second stiffness adjusting device, a base, a drainage ditch and a shear hinge device. The structure of the present application has lower dynamic stiffness than ordinary spring floating slab, but the static stiffness is not reduced, that is, the damping effect of the rail system is improved while the carrying capacity is ensured. It also has certain lateral stiffness, so that the stress condition of the rail structure in the curve section is significantly improved. It can also achieve ultra-low frequency damping within 10 Hz, and suppress the "low frequency vibration amplification" phenomenon of traditional spring floating slab.

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.