HYDRAULICALLY DAMPING ASSEMBLY BEARING

Abstract

A hydraulically damping assembly bearing has two fluid-filled chambers which lie axially opposite each other and are hydraulically connected by a channel. A first chamber forms a working chamber enclosed by a bearing spring body and a second chamber forms a compensating chamber enclosed by a bellows. The compensating chamber has an axially extending inner wall encircling an interior. The bearing includes an annular body axially between the working and compensating chambers, enclosing an axial throughopening opening into the working chamber and closed by a membrane integrally formed with the inner wall of the bellows. The membrane has a central region defined by the inner wall and together with the inner wall delimits the interior. The membrane has a collar region encircling the central region and integrally formed with the central region. The outer circumference of the collar is rigidly connected to the annular body and/or the spring body.

Claims

1-13. (canceled)

14. A hydraulically damping assembly bearing, comprising: a housing; a working chamber defined in the housing; a balance chamber defined in the housing opposite the working chamber in an axial direction; the working chamber and the balance chamber filled with a fluid and hydraulically connected to one another by at least one channel; a bearing spring member surrounding the working chamber; a bellows surrounding the balance chamber; an inner wall of the bellows extending in an axial direction, the inner wall encompassing an inner space; an annular member arranged between the working chamber and the balance chamber in the axial direction; an axial passage aperture defined by the annular member, the axial passage aperture opening into the working chamber; a membrane configured to close the axial passage aperture, the membrane being formed in one part with the inner wall of the bellows; the membrane having a central region defined and/or bounded by the inner wall, the central region bounding the inner space together with the inner wall, wherein; the membrane has a collar region encompassing the central region and the collar region is formed in one part with the central region, and the collar region is fixedly connected at its outer periphery to the annular member and/or to the bearing spring member.

15. The hydraulically damping assembly bearing in accordance with claim 14, wherein the inner wall has at least one bulge, the inner space having an axial center axis, the at least one bulge extending about the axial center axis.

16. A hydraulically damping assembly bearing in accordance with claim 15, wherein the inner wall has at least one dimple axially adjoining the at least bulge, the at least one dimple extending about the axial center axis.

17. A hydraulically damping assembly bearing in accordance with claim 14, wherein the membrane has at least one stiffening element arranged at a side of the membrane, the side of the membrane facing the inner space, the stiffening element being configured to increase the stiffness of the membrane.

18. A hydraulically damping assembly bearing in accordance with claim 14, wherein the inner space comprises a side, the side being open toward an environment, and the side being remote from the membrane.

19. A hydraulically damping assembly bearing in accordance with claim 14, wherein the membrane is vibration capable in the axial direction relative to the annular member.

20. A hydraulically damping assembly bearing in accordance with claim 14, wherein the annular member has two ring-shaped annular member parts, the two ring-shaped annular member parts being arranged axially above one another, and the collar region is fixed at its outer periphery between the two ring-shaped annular member parts.

21. A hydraulically damping assembly bearing in accordance with claim 20, wherein the annular member has a recess at a side remote from the working chamber, the axial passage aperture opening into the recess.

22. A hydraulically damping assembly bearing in accordance with claim 21, wherein the recess is provided in an annular member part of the annular member parts, the annular member part being remote from the working chamber.

23. A hydraulically damping assembly bearing in accordance with claim 14, wherein the at least one channel is provided in the annular member.

24. A hydraulically damping assembly bearing in accordance with claim 14, wherein the bearing spring member has an elastomeric bearing spring and two connector parts of stable shape, the two connector parts of stable shape each fixedly connected to the bearing spring member, the bearing spring extending in the axial direction between the two connector parts of stable shape.

25. A hydraulically damping assembly bearing in accordance with claim 14, wherein the membrane is configured in a disk shape and the membrane is movable in the axial direction with respect to the annular member, and wherein the central region and the collar region together form the membrane, the central region and the collar region together being able to rise from the annular member in the axial direction.

26. A hydraulically damping assembly bearing in accordance with claim 21, wherein the membrane is disposed in the recess.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0030] The invention will be described in the following with reference to a preferred embodiment and to the drawing. There are shown in the drawing:

[0031] FIG. 1 is a perspective view of a hydraulically damping assembly bearing in accordance with an embodiment;

[0032] FIG. 2 is a plan view of the hydraulically damping assembly bearing in accordance with FIG. 1;

[0033] FIG. 3 is a longitudinal section through the hydraulically damping assembly bearing along the line A-A visible from FIG. 2;

[0034] FIG. 4 is a different longitudinal section through the hydraulically damping assembly bearing along the line B-B visible from FIG. 3; and

[0035] FIG. 5 is a bottom view of the hydraulically damping assembly bearing in accordance with FIG. 1.

DETAILED DESCRIPTION OF THE INVENTION

[0036] Different views of a hydraulically damping assembly bearing 1 in accordance with an embodiment can be seen from FIGS. 1 to 5, with a center axis 2 extending in an axial direction x being associated therewith. The hydraulically damping assembly bearing 1 has a central installation element 3 and a housing 4 that is closed at the front face on a side remote from the central installation element 3 by a bellows cover 5 in which a plurality of holes 30 are provided. Additional installation elements 6 are furthermore provided at the housing 4. A cap 7 encompassing the central installation element 3 is also fastened thereto.

[0037] A bearing spring member 8 is arranged in the housing 4 and has an elastomeric bearing spring 9 and two connector parts 10 and 11 connected thereto between which the bearing spring 9 extends in the axial direction x. The central installation element 3 is fastened to a first one of the connector parts 10 that extends, in particular axially, from the housing 4. In accordance with a possible alternative, the first connector unit 10 is formed, e.g. in one piece, with the central installation element 3. A second one of the connector parts 11 radially contacts an inner peripheral wall of the housing 4 and axially at a radial inner shoulder 22 of the housing 4 so that the bearing spring member 8 is connected to the housing 4 by the second connector part 11. An annular member 12 is arranged between the bearing spring member 8 and the bellows cover 5 in the axial direction x and is composed of two ring-shaped annular member parts 13 and 14 arranged axially above one another. The annular member 12 surrounds an axial passage aperture 15 that is closed by a membrane 16.

[0038] The bellows cover 5 is in particular secured at the second connector part 11, in particular in the pre-installed state, by a snap-in connection 23. The annular member 12 is furthermore fixed between the second connector part 11 and a margin 24 of the bellows cover 5 that faces the annular member 12 and that is in turn fixed to the housing 4.

[0039] A bellows 17 is provided at a side of the annular member 12 remote from the bearing spring member 8, said bellows 17 having an inner wall 19 encompassing an inner space 18, an outer wall 20 encompassing it, and a base 21 that connects the inner wall 19 to the outer wall 20 and by which the bellows 17 is supported, in particular axially, at the bellows cover 5. The end of the outer wall 20 remote from the base 21 is fixed between the annular member 12 and the bellows cover 5.

[0040] The bearing spring member 8 surrounds a working chamber 24 into which the passage aperture 15 opens. The bellows 17 furthermore surrounds an annular balance chamber 26 that is separated from the working chamber 25 by the annular member 12 and the membrane 16. The chambers 25 and 26 are filled with a fluid and are hydraulically connected to one another by a channel 27 extending in the annular member 12.

[0041] The membrane 16 comprises a central region 34 and a collar region 28 that encompasses it and adjoins it and that is fixed at its outer periphery between the annular member parts 13 and 14 at the annular body 12. The membrane 16 and the inner wall 19 are formed in one part with one another. The central region 34 and the collar region 28 are furthermore formed in one part with one another and in one part with the bellows 17, with the end of the inner wall 19 of said bellows 17 facing the membrane 16 being connected to the membrane 16 at the transition between the central region 34 and the collar region 28. The central region 34 and the collar region 28 together form the membrane 16 that in particular forms a disk-shaped member.

[0042] At its side remote from the working chamber 25, the annular member 12 has a recess 29 that is preferably circular and into which the passage aperture 15 opens, preferably centrally, that in particular has a smaller diameter than the recess 29 in which the membrane 16 is disposed. The membrane 16 together with the inner wall 19 bounds the inner space 18 that is open to the environment at its side remote from the membrane 16. The center axis 2 also forms a center axis of the inner space 18.

[0043] The inner wall 19 has a bulge 31 extending about the center axis 2 in the axial direction x and a dimple 32 that adjoins it and extends about the center axis 2. Stiffening elements 33 are furthermore provided in the form of ribs that extend axially from the central region 24 of the membrane 16 into the inner space 18.