US 5,887,859 A · Suspension bushing

Abstract

An entire outer periphery of an axially central portion of an inner cylindrical member is expanded outwardly to define an expanding portion having a spherical configuration of which a center locates about an axial line of the inner cylindrical member. A cylindrical internal ring is disposed in about the middle between an outer cylindrical member and the inner cylindrical member coaxially and an axially central portion of the internal ring bends in conformity with the expanding portion of the inner cylindrical member. By virtue of the expanding portion and internal ring, the rigidity in the directions perpendicular to the axial direction increases. A first vibration-damping rubber member and a second vibration-damping rubber member are formed between the internal ring and the inner cylindrical member and between the internal ring and the outer cylindrical member, respectively, and annular recesses are formed in both axial end portions of the first and second vibration-damping rubber member, respectively, such that an inner end of each annular recess locates inwardly of an end edge of the expanding portion, thus decreasing the torsional rigidity.

Claims18

Dependent claims

A suspension bushing comprising:

an inner cylindrical member having an expanding portion which expands outwardly from an entire outer periphery of an axially central portion thereof, said expanding portion having a generally spherical configuration of which a center locates about an axial line of said inner cylindrical member;
an outer cylindrical member disposed coaxially outside said inner cylindrical member;
an internal ring disposed in about the middle between said inner cylindrical member and said outer cylindrical member, an axially central portion of said internal ring bending in conformity with said expanding portion;
a first vibration-damping rubber member interposed between and joined to said internal ring and said inner cylindrical member;
and
a second vibration-damping rubber member interposed between and joined to said internal ring and said outer cylindrical member, said first vibration-damping rubber member and said second vibration-damping rubber member having annular recesses in axial end portions thereof, respectively, and an inner end of each annular recess locating inwardly of an end edge of said expanding portion.

3 more elements

As suspension bushing comprising:

a cylindrical member having an expanding portion which expands outwardly from an entire outer periphery of an axially central portion thereof, said expanding portion having a spherical configuration of which a center locates about an axial line of said inner cylindrical member;
a vibration-damping rubber member having a predetermined thickness, which is joined to an outer periphery of said cylindrical member;
an internal ring which is embedded in said vibration-damping rubber member in about the middle thereof, an axially central portion of said cylindrical internal ring bending in conformity with said expanding portion, said vibration-damping rubber member having annular recesses in axial end portions thereof between said internal ring and said cylindrical member, an inner end of each annular recess locating inwardly of an end edge of said expanding portion, and said vibration-damping rubber member having a pair of flanges which project radially outwardly from axial ends thereof, and a bracket connected to a vibrating body being press-fitted unto an outer periphery of said vibration-damping rubber member between said flanges.

A suspension bushing comprising:

an inner cylindrical member having an expanding portion which expands outwardly from an entire outer periphery of an axially central portion thereof, said expanding portion having a generally spherical configuration of which a center locates about an axial line of said inner cylindrical member;
an outer cylindrical member disposed coaxially outside said inner cylindrical member, an axially central portion of said outer cylindrical member bending in conformity with said expanding part to define a bending portion, and said bending portion including at an axial center thereof a larger-diameter part having a uniform larger diameter, which is adapted to abut an inner surface of a cylindrical bracket disposed outside said outer cylindrical member;
a vibration-damping rubber member interposed between and joined to said inner cylindrical member and said outer cylindrical member, said vibration-damping rubber member having annular recesses in axial end portions thereof, and an inner end of each annular recess locating inwardly of an end edge of said expanding portion.

Dependencies are inferred from the claim text.

Suspension bushing

Life of this patent

Suspension bushing

Life of this patent

Abstract

Claims18