Hydraulic antivibration pivot with axial stops, vehicle equipped with such a pivot, and method of producing such a pivot
OwnerBernard Bouhier, Pascal Carobolante +1inventors
InventorsBernard Bouhier, Pascal Carobolante, Pierre Gautier
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Abstract
Hydraulic antivibration pivot comprising coaxial internal and external reinforcements connected by an elastomer body that defines two hydraulic chambers communicating with each other through a throttled passage. An intermediate reinforcement embedded in the elastomer body comprises two rigid annuluses about which the external reinforcement is tightened, the said annuluses having collars that project from this reinforcement. The external reinforcement is immobilized between the two collars, which means that axial loads are absorbed without the risk of the pivot becoming detached.
Claims8
Hydraulic antivibration pivot intended to be inserted between a first and a second rigid elements to damp vibrations along at least a first axis, this pivot being designed to be inserted into a housing belonging to the second rigid element, and the said pivot comprising:
- an internal rigid reinforcement that extends longitudinally along a second axis perpendicular to the first axis and that is intended to be fixed to the first rigid element,
- an external rigid reinforcement that is of a tubular shape centred on the second axis and that surrounds the internal reinforcement, this external reinforcement having a certain inside diameter and a certain outside diameter,
- an elastomer body connecting together the internal and external reinforcements while defining with the latter at least two liquid-filled hydraulic chamber, which are situated on each side of the internal reinforcement and which are connected to each other by at least one throttled passage,
- and a rigid intermediate reinforcement which is embedded in the elastomer body near the external reinforcement and which is cut away over the hydraulic chambers, this intermediate reinforcement comprising two rigid annuluses which are centred on the second axis and which frame the hydraulic chambers axially, the external reinforcement gripping these two rigid annuluses and sealing the hydraulic chambers, in which pivot the intermediate reinforcement comprises, beyond the two rigid annuluses a first and a second collars that extend radially outwards, thereby forming two shoulders oriented axially towards the two annuluses, the external reinforcement being retained between these shoulders without play, in which pivot the first and second collars have a radial size that is greater than the inside diameter of the external reinforcement and thus act as axial stops for the external reinforcement, in which pivot the outside diameter of the external reinforcement is greater than the radial size of at least the first collar, in which pivot the first and second collars are covered with an elastomer layer belonging to the elastomer body, wherein the outside diameter of the external reinforcement is greater than the radial size of the elastomer layer covering the first collar.
Dependencies are inferred from the claim text.