Hydraulic antivibration support
AssigneeHutchinson
InventorsDenis Reh, Jean-Pierre Monneau
Life of this patent
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Abstract
A hydraulic antivibration support comprises a strength member connected to a plate by an elastomer body whose base is pressed against the plate to define two hydraulic chambers and a narrow channel all filled with liquid. A perforated sheet metal insert embedded in the base of the elastomer body is crimped to the plate via two fixing edges that are interconnected by two free edges of the base. The perforated insert has a stamped corrugation which defines the narrow channel and whose outer side wall extends around the entire periphery of the plate.
Claims11
A hydraulic antivibration support designed to be interposed between two rigid elements to damp vibration between said 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 being constituted by a plate which extends perpendicularly to the first axis and which has a support face facing towards the first strength member;
- an elastomer body in the form of a one-piece molding 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 clamping parallel to the first axis, the elastomer body further including a thick bell-shaped wall extending along the first axis and flaring to the base of said elastomer body from a top secured to the first strength member;
- a liquid-filled working chamber defined by the thick wall of the elastomer body and by the support plate of the plate;
- a liquid-filled compensation chamber defined by a freely-deformable thin wall belonging to the elastomer body and by the support face of the plate;
- a liquid-filled narrow channel interconnecting the first and second liquid-filled chambers and which is formed between the base of the elastomer body and the support face of the plate;
- and
- a rigid perforated insert embedded in the base of the elastomer body and secured to the plate by crimping to press the base of the elastomer body in sealing contact against the support face of the plate, said perforated insert presenting, on a portion of its periphery, a corrugation projecting away from the plate and open towards the support face of said plate, said corrugation co-operating with the support face of the plate to define the narrow channel, and said corrugation having a radially inner side wall, a radially outer side wall, and a web interconnecting the inner and outer side walls;
- wherein the outer side wall of the corrugation extends continuously around the entire periphery of the perforated insert.
Dependencies are inferred from the claim text.