NOZZLE PLATE FOR AN AXIALLY DAMPING HYDRAULIC BEARING

Abstract

A nozzle plate for an axially damping hydraulic mount having a passage disk with a passage for connecting a work chamber and a balance chamber of a hydraulic mount. The passage disk is rotationally fixable at a first angular position in the hydraulic mount. The nozzle plate also has a cover disk with an aperture that is arranged above the passage at a pre-definable angular position. The passage of the passage disk is bound on one side by the cover disk. The aperture forms an inlet opening into the passage or an outlet opening out of the passage for a fluid damping agent. The cover disk is rotationally fixed such that the aperture is at a second angular position selected from a plurality of different angular positions with respect to the passage disk.

Claims

1-14. (canceled)

15. A nozzle plate for an axially damping hydraulic mount of the type having a work chamber and a balance chamber, the nozzle plate comprising: a passage disk with a passage for connecting a work chamber and a balance chamber of a hydraulic mount, the passage disk being rotationally fixable at a first angular position in the hydraulic mount; and a cover disk, the passage of the passage disk being bound on one side by the cover disk, the cover disk having an aperture that is arranged above the passage of the passage disk at a pre-definable angular position, the aperture forming an inlet opening into the passage or an outlet opening out of the passage for a fluid damping agent, the cover disk being rotationally fixed such that the aperture is at a second angular position selected from a plurality of different angular positions with respect to the passage disk.

16. The nozzle plate of claim 15, wherein the passage of the passage disk has a length and a cross-sectional area, and the cross-sectional area changes over the length of the passage of the passage disk.

17. The nozzle plate of claim 16, wherein the passage of the passage disk has a passage width, a passage depth and an inclination of a passage wall, and the passage width, the passage depth and/or the inclination of the passage wall changes over the length of the passage.

18. The nozzle plate of claim 16, wherein the cross-sectional area of the passage changes step-wise over the length of the passage of the passage disk.

19. The nozzle plate of claim 16, wherein the passage of the passage disk has a predefined cross-sectional area independent of an angular position of the cover disk.

20. The nozzle plate of claim 16, wherein a section of the passage bounded by the cover disk has a constant cross-sectional height and/or width over the length of the passage.

21. The nozzle plate of claim 15, wherein the cover disk is latched in an angular position with respect to the passage disk.

22. The nozzle plate of claim 15, wherein the passage disk and/or the cover disk is/are respectively formed in one piece from plastic.

23. The nozzle plate of claim 16, wherein the cross-sectional area of the passage changes continuously over the length of the passage of the passage disk.

24. The nozzle plate of claim 23, wherein a passage inflow is defined by the aperture in the cover disk, the passage disk having an aperture at one end of the passage, the aperture at one end forming a passage outflow, and the cross-sectional area of the passage reduces continuously starting from the aperture in the passage disk to the aperture in the cover disk.

25. The nozzle plate of claim 23, wherein the angular position of the aperture in the cover disk, and thus of the passage inflow is presettable by changing an angular positioning of the passage cover disk.

26. The nozzle plate of claim 15, further comprising: a work chamber for receiving the fluid damping agent and a balance chamber for the fluid damping agent, wherein the nozzle plate extends between the work chamber and the balance chamber transversely to a hydraulic mount axis, with the nozzle plate is rotationally fixed in the hydraulic mount.

27. The nozzle plate of claim 26, wherein the aperture in the cover disk opens into the work chamber and the cross-sectional area of the passage increases over the length of the passage starting from the aperture.

28. The nozzle plate of claim 26, wherein the aperture in the cover disk opens into the work chamber and the cross-sectional area of the passage increases continuously over the length of the passage starting from the aperture.

29. An axially damping hydraulic mount comprising: a work chamber for receiving a fluid damping agent; a balance chamber for the fluid damping agent; and a nozzle plate extending between the work chamber and the balance chamber transversely to a hydraulic mount axis, with the nozzle plate being rotationally fixed in the hydraulic mount, the nozzle plate further comprising; a passage disk with a passage for connecting the work chamber and the balance chamber of the hydraulic mount, the passage disk being rotationally fixed at a first angular position in the hydraulic mount; and a cover disk, the passage of the passage disk being bound on one side by the cover disk, the cover disk having an aperture that is arranged above the passage of the passage disk at a pre-definable angular position, the aperture forming an inlet opening into the passage or an outlet opening out of the passage for the fluid damping agent, the cover disk being rotationally fixed such that the aperture is at a second angular position selected from a plurality of different angular positions with respect to the passage disk.

30. The hydraulic mount of claim 29, wherein the passage of the passage disk has a length and a cross-sectional area, and the cross-sectional area changes over the length of the passage of the passage disk.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] An embodiment of the invention is described in more detail in the following with reference to the following figures. It shows in a schematic representation:

[0024] FIG. 1 is a cross section of a hydraulic mount in accordance with an embodiment of the present invention in cross-section;

[0025] FIG. 2 is a partly sectional representation of a nozzle plate in accordance with an embodiment of the invention;

[0026] FIG. 3 shows a cover disk of the nozzle plate in accordance with FIG. 2;

[0027] FIG. 4 is a plan view of a passage disk of the nozzle plate in accordance with FIG. 2;

[0028] FIG. 5 shows a cross-section through AA of the passage disk in FIG. 4; and

[0029] FIG. 6 is a schematic representation of an adjustment of the nozzle plate in accordance with FIG. 2.

DETAILED DESCRIPTION OF THE INVENTION

[0030] FIG. 1 shows a cross-section through a hydraulic mount 1 in accordance with an embodiment of the present invention. The hydraulic mount 1 comprises a mount core 2 as well as a two-part outer casing having an upper housing part 3 and a lower housing part 4. An elastomeric support body 5 is arranged between the mount core 2 and the upper housing part 3. The mount core 2 is supported against the upper housing part 3 via the support body 5. The mount core 2 serves the fastening of the hydraulic mount 1 at the installation site in the motor vehicle. The support body 5 surrounds a work chamber 6 for receiving a fluid damping agent. The work chamber 6 is spatially separated from a balance chamber 8, which is disposed below in the axial direction. The nozzle plate 7 comprises a passage disk 9 and a passage cover disk 10, which are clamped transversely to a mount axis 11. A passage 12 running around at the periphery of the nozzle plate 7 is encompassed by the passage disk 9 and the passage cover disk 10. The passage 12 allows the transfer of fluid damping agent between the work chamber 6 and the balance chamber 8. The passage disk 9 has at its outer right side a closable filling opening for filling the hydraulic mount 1 with the fluid damping agent. The center axis of the filling opening is arranged perpendicular to the mount axis 11. The balance chamber 8 is encompassed at its lower side by an elastomeric bellows 13, which is surrounded by the lower housing part 4 for mechanical protection.

[0031] FIG. 2 shows the nozzle plate 7 in accordance with an embodiment of the invention in a partly sectional representation. The passage cover disk 10 is rotationally fixed on the passage disk 9. For this purpose, cut-outs 14 are provided at the periphery of the passage cover disk 10 and one or more corresponding, axially projecting latching projections 15 (FIG. 5) at the periphery of the passage disk 9 can engage into them. The effective length and cross-section of the passage 12 can be preset stepwise by rotationally fixing the passage cover disk 10 with respect to the passage disk 9 before the nozzle plate 7 is installed in the hydraulic mount 1 and the hydraulic 1 is installed in the vehicle. Once installation has taken place, a further adjustment of the effective length or of the effective cross-section is no longer possible or available.

[0032] The passage disk 9 and the passage disk cover 10 bound the passage 12, with the passage 12 extending in arcuate form along the periphery of the passage disk 9 and of the passage cover disk 10. A passage outflow 16 is formed in the passage disk 9 and opens into the balance chamber 8 in the installed state. A passage inflow 17, which opens into the work chamber 6 in the installed state, is provided at the axially opposite side of the nozzle plate 7. The passage inflow 17 is defined by an aperture 18 in the passage cover disk 10. The radial position of the aperture 18 and thus of the passage inflow 17 can be preset by rotation, i.e. by changing the radial positioning of the passage cover disk 10.

[0033] FIG. 3 shows the passage cover disk 10 without the passage disk 9. The passage cover disk 10 having the aperture 18 may be manufactured in one piece from plastic.

[0034] FIG. 4 shows a plan view of the passage disk 9. In the example shown, the passage 12 runs practically along the total periphery of the passage disk 9. The passage disk 9 has an aperture 19 at an end of the passage 12. The aperture 19 forms the above-mentioned passage outflow 16 (FIG. 2).

[0035] The passage disk 9 may likewise be manufactured in one piece from plastic.

[0036] FIG. 5 shows a cross-section through the passage disk 9 along the line A-A in FIG. 4. It can be seen therein that the passage 12 has different cross-sectional areas at the points 20 and 21. The passage cross-section changes continuously over the length of the passage 12. The cross-sectional area in particular decreases continuously starting from the aperture 19 in the passage disk 9. The cross-sectional area increases toward the passage outflow 16 starting from the passage inflow 17. The area change can take place by changing the passage cross-section in an axial and/or radial direction.

[0037] FIG. 6 shows the passage disk 9 with a passage cover disk 10 placed on. As shown by the arrow 22, the passage cover disk 10 can be rotated with respect to the passage disk 9 and can be brought into a desired radial position before the passage disk 9 and the passage cover disk 10 are rotationally fixed with respect to one another for the further installation. The radial position of the passage inflow 17 is changed relative to the passage outflow 16 by rotation. The effective length and the effective cross-section of the passage 12 thus change.

REFERENCE NUMERALS

[0038] 1 hydraulic mount [0039] 2 mount core [0040] 3 upper housing part [0041] 4 lower housing part [0042] 5 support body [0043] 6 work chamber [0044] 7 nozzle plate [0045] 8 balance chamber [0046] 9 passage disk [0047] 10 passage cover disk [0048] 11 mount axis [0049] 12 passage [0050] 13 bellows [0051] 14 cut-out [0052] 15 latching projection [0053] 16 passage outflow [0054] 17 passage inflow [0055] 18 aperture in the passage cover disk [0056] 19 aperture in the passage disk [0057] 20 first cross-sectional area [0058] 21 second cross-sectional area [0059] 22 direction of rotation