ADDITIONAL SPRING FOR A SHOCK ABSORBER OF A MOTOR VEHICLE AND DAMPER BEARING FOR A SHOCK ABSORBER OF A MOTOR VEHICLE

Abstract

An additional spring for a shock absorber of a motor vehicle and a damper bearing for a shock absorber of a motor vehicle. In this case, the additional spring includes a first spring body which has a central hole for guiding through a piston rod of the shock absorber. The first spring body is formed spherical on an end face. The damper bearing according to the invention comprises a cylindrical receptacle space in which the first spring body of the additional spring is retained at least in certain regions, and is distinguished in that the receptacle space has a spherically formed base surface formed corresponding to the end face of the first spring body.

Claims

1-13. (canceled)

14. An additional spring for a shock absorber of a motor vehicle, comprising: a first spring body, which has a central hole for guiding through a piston rod of the shock absorber, wherein the first spring body is formed spherical on an end face.

15. The additional spring as claimed in claim 14, further comprising: a second spring body having a different spring stiffness in relation to the first spring body, wherein the second spring body has a central hole for guiding through a piston rod of the shock absorber and is arranged opposite to the spherical end face, adjoining the first spring body, and wherein the second spring body is formed spherical on its end face facing away from the first spring body.

16. The additional spring as claimed in claim 14, wherein the spherically formed end face is formed in the form of a ball head.

17. The additional spring as claimed in claim 15, further comprising: a bump stop having a different spring stiffness in relation to the two spring bodies wherein the bump stop has a central hole for guiding through a piston rod of the shock absorber and is arranged between the first and second spring body.

18. The additional spring as claimed in claim 17, wherein the bump stop is arranged in a cavity formed in the first and/or second spring body.

19. The additional spring as claimed in claim 17, wherein a piezoelectric pressure sensor is integrated into the bump stop.

20. The additional spring as claimed in claim 16, wherein the bump stop is formed from polyamide.

21. The additional spring as claimed in claim 14, wherein the first and/or spring body are formed from an elastomeric material.

22. The additional spring as claimed in claim 21, wherein the first and/or second spring body are formed from polyurethane.

23. A damper bearing for a shock absorber of a motor vehicle, comprising: a flange region for fastening on a vehicle body and also a cylindrical receptacle space, in which a first spring body of an additional spring with a first spring body, which has a central hole for guiding through a piston rod of the shock absorber, wherein the first spring body is formed spherical on an end face is retained at least in certain regions in the installed state, wherein the receptacle space has a spherically shaped base surface formed corresponding to the end face of the first spring body.

24. The damper bearing as claimed in claim 23, wherein an elastomeric bearing element is arranged in the flange region.

25. The damper bearing as claimed in claim 24, wherein the elastomeric bearing element comprises a piezoelectric pressure sensor.

26. The damper bearing as claimed in claim 23, wherein the base surface of the receptacle space is formed in the form of a ball socket.

27. The additional spring as claimed in claim 15, wherein the first and/or spring body are formed from an elastomeric material.

28. The additional spring as claimed in claim 16, wherein the first and/or spring body are formed from an elastomeric material.

29. The additional spring as claimed in claim 17, wherein the first and/or spring body are formed from an elastomeric material.

30. The additional spring as claimed in claim 18, wherein the first and/or spring body are formed from an elastomeric material.

31. The additional spring as claimed in claim 19, wherein the first and/or spring body are formed from an elastomeric material.

32. The additional spring as claimed in claim 20, wherein the first and/or spring body are formed from an elastomeric material.

33. The damper bearing as claimed in claim 24, wherein the base surface of the receptacle space is formed in the form of a ball socket.

Description

[0024] Further advantages and possible applications of the present invention result from the following description in conjunction with the exemplary embodiment illustrated in the drawing.

[0025] In the figures of the drawing:

[0026] FIG. 1 shows a schematic sectional illustration of the additional spring according to the invention;

[0027] FIG. 2 shows a schematic sectional illustration of the damper bearing according to the invention; and

[0028] FIG. 3 shows the additional spring from FIG. 1 and the damper bearing from FIG. 2 in the installed state in a schematic sectional illustration.

[0029] FIG. 1 shows an additional spring identified as a whole by the reference sign 10. The additional spring 10 comprises a first spring body 12, a second spring body 14, and a bump stop 16.

[0030] In this case, as shown in FIG. 1, the two spring bodies 12, 14 are arranged in series viewed in the axial direction a and the first spring body 12 is formed spherical on its end face 12-1 facing away from the second spring body 14, i.e., the surface has a hemispherical design. Accordingly, the second spring body 14 is also formed spherical, in the present case again hemispherical, on its end face 14-1 facing away from the first spring body 12, via which the second spring body 14 supports itself during the spring compression on the shock absorber cap 34, cf. FIG. 3.

[0031] As can furthermore be inferred from FIG. 1, the bump stop 16 is arranged between the first and second spring body 12, 14 viewed in the axial direction a, in the present case in a cavity formed in the second spring body 14. The bump stop 16 can optionally be provided with a piezoelectric pressure sensor 28, which supplies corresponding input signals for a chassis control.

[0032] Moreover, the spring bodies 12, 14 and the bump stop 16 are each provided with a central hole 18 arranged aligned with one another.

[0033] Furthermore, the spring bodies 12, 14 and the bump stop 16 have different spring stiffnesses. The spring bodies 12, 14, which are formed from an elastomeric material, for example, polyurethane, are designed so that the first spring body 12 has a higher spring stiffness in comparison to the second spring body 14. And the bump stop 16, which is formed from a plastic material, preferably polyamide, has a spring stiffness which is even substantially higher in comparison to the first spring element 12.

[0034] FIG. 2 shows a schematic illustration of a damper bearing identified as a whole with the reference sign 20. The damper bearing 20 comprises a flange region 22 for fastening on a vehicle body and a cylindrical receptacle space 24, formed as a hollow body, for partially accommodating the first spring body 12 of the additional spring 10. Moreover, the damper bearing 20 comprises an elastomeric bearing element 26 in the flange region 22 for the screw connection of the piston rod 32 of the shock absorber 30. The damper bearing 20 can optionally be provided with a piezoelectric pressure sensor 28, which supplies corresponding input signals to a chassis control. The arrangement of the piezoelectric pressure sensor 28 in the damper bearing 20 has proven to be particularly advantageous, since in this way simplified laying of the electrical lines to the chassis control is enabled.

[0035] In this case, as FIG. 2 shows, the base surface 24-1 of the receptacle space 24 is formed corresponding to the spherically formed end face 12-1 of the first spring body 12. I.e., the base surface 24-1 has a counter contour correspondingly formed concave in relation to the convex shaping of the end face 12-1.

[0036] FIG. 3 shows a schematic illustration of the additional spring 10 and the damper bearing 20 in the installed state on a piston rod 32 of a shock absorber 30. Due to the design according to the invention of the contact surfaces 12-1 of the first spring body 12 and the base surface 24-1 of the damper bearing 24, a type of articulated mounting is provided between additional spring 10 and damper bearing, which causes an angle adaptation during the inclined spring compression and thus enables offset-free spring compression.