HYDRAULICALLY DAMPED MOUNTING DEVICE

Abstract

A hydraulically damped mounting device has a first anchor part; a second anchor part in the form of a hollow sleeve containing the first anchor part, such that the first anchor part extends axially of the sleeve; first and second resilient walls interconnecting the first and second anchor parts, the first and second resilient walls being spaced apart so as to define an enclosed space within the sleeve extending circumferentially around the first anchor part and axially bounded by the first and second resilient walls; first and second deformable walls, each extending axially between the first and second resilient walls at circumferentially spaced locations, so as to divide the enclosed space into first and second chambers for hydraulic fluid; a passageway interconnecting the first and second chambers, the passageway being for flow of hydraulic fluid therethrough. In one version the deformable walls have a flap, the movement of which is controlled by support devices so that the flap deforms to allow fluid to pass between the chambers only at or above a predetermined fluid pressure. In another version, the deformable walls have valved openings therein, the valved openings allowing fluid to pass through only at or above a predetermined pressure.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present invention will now be described in detail, by way of example, with reference to the accompanying drawings, in which:

FIG. 1 is a longitudinal sectional view through a hydraulically damped mounting as described in GB-A-2322427;

FIG. 2 is a transverse sectional view along the line A to A in FIG. 1;

FIG. 3 is a perspective view of the hydraulically damped mounting device of FIG. 1 with the sleeve removed;

FIG. 4 is a longitudinal sectional view through the hydraulically damped mounting device of FIG. 1, in a direction perpendicular to FIG. 1;

FIG. 5 is a longitudinal sectional view through another hydraulically damped mounting device described in GB-A-2322427;

FIG. 6 is an end view of the hydraulically damped mounting device of FIG. 5;

FIG. 7 is a transverse sectional view through a mounting device being a first embodiment of the present invention;

FIG. 8 is a detail of the mounting device of FIG. 7;

FIG. 9 is a longitudinal sectional view through the mounting device of FIG. 7;

FIG. 10 is a perspective view of part of the mounting device of FIG. 7;

FIG. 11 is a perspective view of the sleeve of the mounting device of FIG. 7;

FIG. 12 is a side view of the mounting device of FIG. 7, the view of FIG. 9 being taken along the line B to B in FIG. 12;

FIG. 13 is another side view of the mounting device of FIG. 7, FIG. 7 being taken along the line A to A in FIG. 13;

FIGS. 14 a to 14c show a modification of part of the mounting device in FIG. 7, prior to insertion of the relevant parts in the sleeve of FIG. 11;

FIGS. 15 a to 15d show that modification, when the relevant parts are inserted in the sleeve;

FIG. 16 a and 16b shows a further modification of part of the mounting device of FIG. 7;

FIG. 17 is a transverse sectional through a mounting device being a second embodiment of the present invention;

FIG. 18 is a detail of the mounting device of FIG. 17;

FIG. 19 is a longitudinal section view through the mounting device of FIG. 17;

FIG. 20 is a prospective view of part of the mounting device of FIG. 17;

FIG. 21 is another prospective view, from a different angle, of the part of the mounting device of FIG. 17;

FIG. 22 is a side view of the mounting device of FIG. 17; the view of FIG. 19 being taken along the line of B′ to B′ in FIG. 22; and

FIG. 23 is another side view of the mounting device of FIG. 17, FIG. 17 being taken along the line A′ to A′ in FIG. 23.

Claims

1. A hydraulically damped mounting device having: a first anchor part;a second anchor part in the form of a hollow sleeve containing the first anchor part, such that the first anchor part extends axially of the sleeve;first and second resilient walls interconnecting the first and second anchor parts, the first and second resilient walls being spaced apart so as to define an enclosed space within the sleeve extending circumferentially around the first anchor part and axially bounded by the first and second resilient walls;first and second deformable walls, each extending axially between the first and second resilient walls at circumferentially spaced locations, so as to divide the enclosed space into first and second chambers for hydraulic fluid;a passageway interconnecting the first and second chambers, the passageway being for flow of hydraulic fluid therethrough;wherein the deformable walls each have at least one flap forming an abutting un-bonded contact with the sleeve or first anchor part, and there is at least one support device associated with the or each flap, the at least one support device being arranged to resist deformation of the corresponding flap below a pre-determined fluid pressure, to maintain that corresponding flap in said abutting unbonded contact, and to permit deformation of the corresponding flap above said pre-determined fluid pressure, thereby to form a fluid path between said chambers around said flap.

2. A hydraulically damped mounting device according to claim 1, wherein the or each flap extends radially.

3. A hydraulically damped mounting device according to claim 1, wherein each flap has a notch therein at an intermediate position along the axial length of the corresponding flap.

4. A hydraulically damped mounting device according to claim 1, wherein the deformable walls have an abutment surface parallel to the longitudinal axis of the sleeve, which abutment surface contacts the flap when the fluid pressure is below the predetermined fluid pressure.

5. A hydraulically damped mounting device according to claim 1, having a plurality of said support devices spaced apart along the axial extent of each flap.

6. A hydraulically damped mounting device having: a first anchor part;a second anchor part in the form of a hollow sleeve containing the first anchor part, such that the first anchor part extends axially of the sleeve;first and second resilient walls interconnecting the first and second anchor parts, the first and second resilient walls being spaced apart so as to define an enclosed space within the sleeve extending circumferentially around the first anchor part and axially bounded by the first and second resilient walls;first and second deformable walls, each extending axially between the first and second resilient walls at circumferentially spaced locations, so as to divide the enclosed space into first and second chambers for hydraulic fluid;a passageway interconnecting the first and second chambers, the passageway being for flow of hydraulic fluid therethrough;whereinthe deformable walls each makes abutting un-bonded contact with the sleeve or first anchor part, and there is at least one valved opening in at least one of the deformable walls interconnecting the first and second chambers, the at least one valved opening being arranged to permit fluid to pass therethrough only at or above a predetermined pressure.

7. A hydraulically damped mounting device according to claim 6, wherein there are slits in the or each deformable wall, thereby form said valved opening(s).

8. A hydraulically damped mounting device according to claim 6, wherein the valved openings define one-way valves.