Patent ID: 6012710
Filing Date: 2000-01-11
Classification: F16F

Abstract:
A hydraulic antivibration support designed to be interposed between two rigid elements to damp vibration between these two elements essentially along a first axis, the support comprising:first and second rigid strength members suitable for securing respectively to the two rigid elements to be united, the second strength member being constituted by a plate which extends in a mean plane perpendicular to the first axis and which has a ""support"" face facing towards the first strength member;an elastomer body connecting the first strength member to the plate and having a base pressed in sealing contact against the support face of the plate merely by being clamped parallel to the first axis, said axial clamping being obtained by means of a rigid perforated insert which is embedded in the base of the elastomer body and which is held pressed against the support face of the plate by crimping, the base of the elastomer body having at its periphery firstly at least two opposite ""fixing"" edges along which said crimping is performed, and secondly at least two free edges interconnecting the fixing edges, the perforated insert itself having free edges which are embedded in the free edges of the base of the elastomer body and which are merely pressed axially against the support face of the plate, the elastomer body further comprising a bell-shaped thick wall which extends along the first axis which flares to the base of said elastomer body from a top secured to the first strength member and which co-operates with the support face of the plate to define at least a first hydraulic chamber filled with liquid;a deformable second hydraulic chamber also filled with liquid; anda narrow channel which is filled with liquid, and which interconnects the first and second hydraulic chambers;wherein the base of the elastomer body has, at its periphery and at least along each of said free edges, an outer sealing lip made of a solid bead of elastomer projecting towards the plate, said outer sealing lip having an asymmetrical V-shaped profile with an inner bearing face which flares outwards towards the support face of the plate and which is compressed against said support face of the plate, and an outer side face which is substantially perpendicular to the mean plane of the plate.