Cylindrical elastomeric bearing

摘要

A cylindrical elastomeric bearing for carrying relatively large compressive radial loads while accommodating thrust and torsional loads acting along the bearing's longitudinal axis. The bearing generally comprises a rigid interior member and a rigid exterior member, with the two members being joined together by bonded concentric laminae comprising alternating strata of resilient material and non-extensible material. The fatigue life of the bearing is enhanced by forming each resilient stratum with a shear modulus of elasticity such that the stratum will tend to carry a strain substantially equal to the strain carried by every other resilient stratum when the bearing is subjected to a wide range of different torsional loads. The desired shear moduli of elasticity are attained for the different resilient strata over a wide range of different torsional loads by forming at least some of the resilient strata from two or more substrata of selected thicknesses wherein each substratum within a given resilient stratum comprises a resilient material having a unique shear modulus.