Patent ID: 7258331
Filing Date: 2007-08-21
Classification: F16F

Abstract:
1. A hydraulic bearing having an acoustic decoupling matched to lie in a range of hum frequency, the hydraulic bearing comprising: a pot-shaped housing containing a hydraulic volume; a support spring disposed in said pot-shaped housing and being made of elastomeric material; a compensating membrane disposed in said housing; said support spring being arranged in said pot-shaped housing so as to cause said support spring to close off said hydraulic volume from above and said compensating membrane being arranged in said pot-shaped housing so as to cause said compensating membrane to close off said hydraulic volume from below; a partition wall for partitioning said hydraulic volume into a work chamber and a compensating chamber; a transfer channel disposed in said partition wall for interconnecting said chambers; said partition wall defining an opening; a radially prestressed decoupling element fixed in said opening and being made of flexible, elastic material; said decoupling element being laterally clamped so as to be pressure tight; a lattice base plate and a lattice throttle plate disposed in said housing; said decoupling element being between said plates which act to limit displacement of said decoupling element; said decoupling element being made of rubber or an elastic material and having a peripheral bead containing a reinforcement element; and, said radial prestress of said decoupling element occurring because of shrinkage during vulcanization so as to cause said decoupling element to have a natural frequency lying in said range of hum frequency.