Rubber bushing that suppresses vibrations hydraulically

US5178375A · kind A · utility

Assignee

• Firma Carl Freudenberg · DE

Inventors

• Arno Hamaekers · Gorxheimertal, DE
• Arnold Simuttis · Bad Kreuznach, DE

Key dates

• Filing date: Nov 13, 1991
• Grant date: Jan 12, 1993
• Expiry date: Nov 13, 2011

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16F13/1463
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A rubber bushing that suppresses vibrations hydraulically, having a central longitudinal axis and being preponderantly subjected to loads in a direction perpendicular to its axis. The bushing comprises two axially coincident supporting sleeves arranged one inside the other and a rubber resilient element retained between the sleeves. The resilient element forms at least two essentially radially projecting webs having metal contact elements on the outer surfaces that rest against the inner surface of the outer supporting sleeve. The webs demarcate, in conjuction with the walls at each end of the sleeve and with the outer supporting sleeve, at least two working chambers that are full of fluid and communicate through connecting channels. The webs are resiliently compressed to less than their nominal size between the two retaining supporting sleeves. The ends of the webs are outwardly secured in the vicinity of the walls to mechanical rings demarcating, in conjuction with the outer supporting sleeve, annular channels that constitute part of the connecting channels. The annular channels, extending around each end of the resilient element, terminate at and conduct fluid into a working cha…