Hydraulically damping elastomeric bushing

US8534647B2 · kind B2 · utility

Assignee

• AUDI AG · DE

Inventors

• Wolfgang Schnaars · Osnabrück, DE
• Thomas Conrad · Treuchtlingen, DE

Key dates

• Filing date: May 6, 2008
• Grant date: Sep 17, 2013
• Expiry date: Apr 30, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T29/49691
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

An elastomeric bush bearing, with hydraulic damping, comprises a metallic inner part (1), an elastomeric bearing element (2) encompassing the inner part (1) with a cage (3) for reinforcing the bearing element (2) vulcanized thereto. At least two chambers (5), for accommodating a fluid damping medium, are separated from one another by partitions (8), constructed between the bearing element (2), adhesively bonded to the inner part (1) by the vulcanization, but are mutually connected by a damping medium channel (7). A prestressing is applied to the elastomer of the bearing element (2). However, the prestressing is not applied over the bearing shell (4), but instead over the cage (3). Calibration takes places thus by a pressure force exerted on the cage, before assembly of the bearing element (2) in the outer shell (4), which is a deviation from the state of the art.