US 6,644,633 B2 · Hydraulic damping bush

Abstract

A hydraulic damping bush, more particularly in automotive applications, damps loads in a main loading direction. The bush includes an inner sleeve, an outer sleeve, a resilient mounting assembly disposed between the inner sleeve and the outer sleeve, as well as at least one end cap connecting the inner sleeve to the outer sleeve. The at least one end cap caps the space enclosed by the inner sleeve and outer sleeve from the environment. Two chambers are provided charged with a hydraulic damping fluid and interconnected via a transfer duct. The main loading direction is oriented parallel to a longitudinal axis of the inner sleeve and outer sleeve. The end caps can be formed separate from the resilient mounting assembly. Each of the chambers is defined by the resilient mounting assembly or a component adjoining the latter or by one of the end caps. This permits optimum material compatibility for facilitated production and assembly as well as a modular configuration of the bush.

Claims25

Dependent claims

A hydraulic damping bush for damping loads in a main loading direction, comprising:

inner and outer sleeves together enclosing a space and defining a longitudinal direction;
a resilient mounting assembly disposed between said inner sleeve and said outer sleeve;
at least two end caps connecting said inner sleeve to said outer sleeve, capping said space enclosed by said inner sleeve and said outer sleeve, being formed separately from said resilient mounting assembly, and each having a rigid member mutually overlapping in a direction perpendicular to said main loading direction to define an overlapping region;
two chambers charged with a hydraulic damping fluid;
and
a transfer duct interconnecting said two chambers and having an inlet, an outlet, and a main loading direction oriented parallel to said longitudinal axis of said inner sleeve and said outer sleeve;
each of said chambers being defined by one of said resilient mounting assembly, a component adjoining the resilient mounting assembly, and one of said end caps;
and
said inlet and said outlet of said transfer duct being located in said overlapping portion of said rigid members of said resilient mounting assembly and said end caps.

6 more elements

Dependencies are inferred from the claim text.

Hydraulic damping bush

Life of this patent

Hydraulic damping bush

Life of this patent

Abstract

Claims25