US 6,149,382 A · Vacuum pump with shaft bearing

Abstract

A vacuum pump has a shaft bearing (6) supported in a bearing outer ring (8). In order to improve the damping properties a substantially cylindrical radial supporting ring (7) is provided between the outer ring (8) and an interior surface of a bore (9) in a housing (1). First and second circumferential projections (11, 12) project from opposite edges of cylindrical ring (7) on one side. On its other side, a third circumferential projection (13) is axially arranged between the first projections (11, 12). The first and second projections engage one of the outer race and the bore and the third projection engages the other. The damping of the radial support ring (7) is determined by its radial stiffness which is determined by the stiffness of the material and the distance between the projections (11, 12, 13).

Claims13

Dependent claims

A vacuum pump comprising:

a housing which defines a bore with an interior surface;
a bearing received in the bore, the bearing including an inner race connected with a rotating shaft, an outer race disposed in a spaced relationship with the bore interior surface, and rolling elements disposed between the inner and outer races;
a vibration damping ring mounted between the outer race and the bore interior surface, the vibration damping ring including:
first and second circumferential projections disposed at opposite ends of the damping ring and engaging one of the bearing outer race and the bore interior surface,
a third circumferential projection disposed centrally along the damping ring and engaging the other of the bearing outer surface and the bore interior surface, and
cylindrical spring sections disposed between the third circumferential projection and the first and second circumferential projections for absorbing vibration and damping passage of vibration between the housing and the bearing outer race.

3 more elements

Dependencies are inferred from the claim text.

Vacuum pump with shaft bearing

Life of this patent

Vacuum pump with shaft bearing

Life of this patent

Abstract

Claims13