Receptacle for a uniball joint, joint assembly, and suspension arm

Abstract

The invention relates to a receptacle for a uniball joint for installation in a joint receptacle, located in the body, of a suspension arm, in particular of a supporting arm. The receptacle comprises a first tube element; a second tube element which is concentrically arranged in the first tube element, wherein the second tube element preferably has a shorter length than the first tube element; and a plastic element between the first and the second tube element. The plastic element fully surrounds the second tube element in the radial direction and arranges and fixes the second tube element in the first tube element in such a way that the second tube element is fully accommodated in the first tube element. The first tube element has outer dimensions which are suitable for a tight fit, preferably by means of interference fit, in a joint receptacle, located in the body, of a suspension arm. The second tube element has inner dimensions which are suitable for fixedly but detachably accommodating a uniball joint, in particular by means of interference fit, and the plastic element has a predetermined hardness for providing a damping effect with respect to a relative movement between the tube elements.

Description

[0001] Mounting for a uniball joint, joint arrangement and wishbone

[0002] The present invention relates to a receptacle for a uniball joint for installation in a body-side joint receptacle of a wishbone, in particular a support arm, a joint arrangement and a wishbone.

[0003] In automotive engineering, it is well known that control arms, particularly support arms for steerable wheels, have body-side and wheel-side joints. Rubber bearings are used for body-side joints. These are pressed into a designated joint socket in the control arm, for example, in the form of a bore. Movements here occur in the rubber. Neither the outer ring nor the inner sleeve of the rubber bearing may rotate, which places high demands on a flawless connection between the rubber (elastomer body) and the metal. Rotational movement in these joints is usually limited to an angle of approximately ± 20 degrees, and vertical or transverse movement to a distance of ± 1 millimeter. This type of joint relies primarily on the vibration- and sound-damping properties of the rubber.

[0004] During operation, the rubber is subjected to constant shock and torsional loads, including those caused by rotational and lateral movements of the control arm. The rubber used therefore typically represents a compromise between shock absorption and sufficient pivoting and torsional capability. During operation, the rubber is known to wear, and thus the functionality of the joint is compromised. In particular, the torsional forces caused by rotational and lateral movements of the control arm cause accelerated wear of the rubber. Since the torsional forces partially degrade the rubber from within, the wear is often not noticed until the joint is completely broken. Therefore, such joints must be replaced occasionally, which is very time-consuming.

[0005] It is therefore the object of the present invention to alleviate or eliminate at least one of the above-mentioned disadvantages of the rubber joints for the body-side attachment of a wishbone, in particular a support arm.

[0006] According to the invention, a receptacle for a uniball joint according to claim 1, a joint arrangement according to claim 9, or a wishbone according to claim 12 or 14 is provided. In particular, a receptacle for a uniball joint for installation in a body-side joint receptacle of a wishbone, in particular a support arm, is provided, which comprises the following: a first tubular element; a second tubular element arranged concentrically in the first tubular element, wherein the second tubular element preferably has a shorter length than the first tubular element;and a plastic element between the first and second tubular elements, which completely surrounds the second tubular element in the radial direction and arranges and fixes the second tubular element in the first tubular element in such a way that the second tubular element is completely received in the first tubular element, wherein the first tubular element has external dimensions which are suitable for a firm fit, preferably by means of a press fit, in a body-side joint receptacle of a wishbone, wherein the second tubular element has internal dimensions which are suitable for a firm but detachable reception of a uniball joint, in particular by means of a press fit, and wherein the plastic element has a predetermined hardness for providing damping against a relative movement, preferably a radial relative movement, between the tubular elements.;

[0007] Such a mount allows for the integration of a uniball joint in such a way that the joint's movements are provided by the uniball joint, while shocks are absorbed / damped by the plastic element. Movement and damping are thus decoupled and can be optimized accordingly. Certain movements are also decoupled from each other, meaning they do not influence each other.

[0008] Preferably, the first and / or second tubular element are made of metal, which, on the one hand, provides the required strength and, on the other hand, enables good assembly. In one embodiment, the second tubular element is shorter than the first tubular element and / or the second tubular element is mounted centrally in the longitudinal direction of the first tubular element.

[0009] To improve the fixation of the plastic element and / or to increase the damping travel, the first tubular element has a contour on its inner circumference for at least partially receiving the plastic element, in particular in the form of a circumferential groove. Alternatively or additionally, the second tubular element can have a contour on its outer circumference for at least partially receiving the plastic element, in particular in the form of a circumferential groove. Corresponding contours are preferably designed to be centered in the longitudinal direction of the receptacle. The contour on the inner circumference of the first tubular element extends in particular over the entire length of the second tubular element. The plastic element preferably extends substantially over the entire length of the first tubular element and is in contact with the inner circumference, wherein the plastic element has a uniform thickness over the length of the second tubular element and / or tapers in the region of the longitudinal ends.

[0010] In one embodiment, the plastic element has a substantially axially symmetrical shape, with two radially inwardly projecting stops formed in at least one end region, which can serve as anti-tilt pins. For good damping properties, the plastic element is made of a polymer, in particular polyurethane, and / or has a Shore A hardness of 60-85°, preferably 70-80°, in particular 73-75°, and particularly preferably approximately 74°. Furthermore, the plastic element preferably has a material thickness that is greater than the material thickness of the first and / or second tubular element.

[0011] The joint arrangement for a body-side joint mount of a wishbone, in particular a support arm, comprises, in particular, the following: a mount of the type described above and a uniball joint that is fixedly but releasably received in the second tubular element, in particular by means of a press fit. The uniball joint has a central passage for receiving and guiding a leg of a fastening element, the passage being tiltable with respect to a tilting point and rotatable about its longitudinal axis. The joint arrangement enables the above-mentioned advantages.

[0012] In one embodiment, the uniball joint has a length that is shorter than the length of the first tubular element, wherein the joint arrangement further comprises two end caps that can be placed on opposite ends of the uniball joint, wherein the end caps each have a passage which, when the end caps are in place, is aligned with the passage in the uniball joint to together provide an extended passage, wherein the end caps have outer dimensions that fit with play into the inner circumference of the first tubular element and a length that is dimensioned such that the end caps protrude longitudinally beyond the first tubular element when in place. On the one hand, this relocates the joint part into the first tubular element and thus protects it, and on the other hand, the passage is extended to facilitate corresponding fastening.Furthermore, the end caps can be dimensioned and selected to limit the movements of the uniball joint. For this purpose, for example, at least one of the end caps can have external dimensions that limit the tilting of a received leg at least within a predetermined angular range. The control arm, in particular a support arm with a body-side joint mount, in particular has a joint arrangement of the type described above, which is firmly but releasably received, in particular by means of a press fit, in the joint mount. Preferably, the first tubular element extends through the joint mount and protrudes beyond its ends.

[0013] Alternatively, a control arm, in particular a support arm, can be provided with a body-side joint mount in which at least one plastic element is accommodated, via which a uniball joint is directly or indirectly positioned and fixed in the joint mount. This can also result in a decoupling of mobility from damping, whereby the first and / or second tubular element can optionally be omitted.

[0014] The invention is explained in more detail below with reference to the drawings: In the drawings:

[0015] Fig. 1 is a schematic perspective view of a receptacle for a uniball joint;

[0016] Fig. 2 is a schematic cross-sectional view of the receptacle according to Fig. 1;

[0017] Fig. 3 is a schematic cross-sectional view of the receptacle according to Fig. 1;

[0018] Fig. 4 is a schematic cross-sectional view of the holder with the uniball joint inserted;

[0019] Fig. 5 is a schematic perspective view of an embodiment of an end cap for placement on a uniball joint;

[0020] Fig. 6 is a schematic plan view of the end cap according to Fig. 5;

[0021] Fig. 7 is a schematic perspective view of another embodiment of an end cap for mounting on a uniball joint;

[0022] Fig. 8 is a schematic plan view of the end cap according to Fig. 7;

[0023] Fig. 9 is a schematic cross-sectional view of the holder with the uniball joint inserted and the end caps attached;

[0024] Fig. 10 is a schematic plan view of an exemplary support arm;

[0025] Fig. 11 is a schematic side view of the support arm; and

[0026] Fig. 12 is a schematic end view of the exemplary support arm.

[0027] The relative terms used in the following description, such as left, right, above, and below, refer to the drawings and are not intended to limit the application in any way, even though they may indicate preferred arrangements. The term "essentially" is intended to encompass typical deviations in the range of no more than 5%; with respect to angular ranges, deviations of up to 2° are included.

[0028] The structure of a holder 1 for a uniball joint, which is not shown in Figures 1 to 3, is first described with reference to Figures 1 to 3. Figure 1 shows a schematic perspective view of the holder, and Figures 2 and 3 show schematic cross-sectional views along different cutting lines.

[0029] As can best be seen in Figures 2 and 3, the receptacle 1 has a first, outer tube element 3, a second, inner tube element 5, and a plastic element 7.

[0030] The first tubular element 3 is preferably made of metal, but can also be made of another suitable material that is suitable for the mechanical loads in a wishbone, in particular a support arm. Non-exhaustive examples of this are high-strength plastic, glass fiber reinforced plastic, and carbon fiber composite materials. The first tubular element 3 has external dimensions that are suitable for a tight fit, preferably by means of a press fit, in a body-side joint mount of a wishbone, in particular a support arm. Alternatively, the first tubular element 3 can also have, for example, an external thread at each of its longitudinal ends, via which the first tubular element could be fixed in a joint mount of a wishbone. Other fastening options are also possible.In this case, a corresponding fastening of the first tubular element 3 in a body-side joint mount of a wishbone should preferably be designed to be detachable. The term "detachable" refers to a detachment that at least does not destroy the body-side joint mount.

[0031] On its inner circumference, the first tubular element has a recess 9 that is symmetrical with respect to a longitudinal center plane, i.e., a plane that intersects the first tubular element 3 centrally in the longitudinal direction. The recess 9 preferably has a length that is greater than the length of the second tubular element 5, as shown.

[0032] The second tubular element 5 is again preferably made of metal, but can also be made of another suitable material. In particular, the first tubular element 3 and the second tubular element 5 can be made of the same material. The second tubular element 5 has an outer diameter that is smaller than the inner diameter of the first tubular element 3. The inner diameter of the second tubular element 5 is, as explained in more detail below, dimensioned to accommodate a uniball joint, preferably by means of a press fit. The second tubular element 5 preferably has a length that is shorter than the length of the first tubular element 3, as shown.

[0033] The plastic element 7 is located between the first pipe element 3 and the second pipe element 5, contacts both, and arranges the second pipe element 5 in the first pipe element 3. The plastic element 7 contacts the first pipe element 3 along its entire inner circumference and extends in particular into the recess 9 on the inner circumference of the first pipe element 3. The plastic element 7 also contacts the second pipe element 5 over its entire surface over its outer circumference. The second pipe element 5 is positioned concentrically within the first pipe element 3 via the plastic element 7. Furthermore, the plastic element 7 positions the second pipe element 5 essentially symmetrically with respect to the aforementioned longitudinal center plane of the first pipe element 3. While contact over the entire inner / outer circumference of the respective pipe elements 3, 5 is desirable, it is not absolutely necessary.

[0034] The plastic element 7 is preferably manufactured by injection molding and injected directly into the space formed between the first and second pipe elements 5, which is sealed by corresponding further elements.

[0035] At the longitudinal ends of the plastic element 7, the plastic element 7 tapers from the longitudinal ends of the second tubular element 5 to the corresponding longitudinal end of the first tubular element 3. A corresponding taper is shown at 11. At the left end shown in Figure 2, the taper 11 of the plastic element 7 is circularly symmetrical with respect to a longitudinal center axis of the receptacle 1. At the right-hand end, in deviation from the circularly symmetrical shape, the plastic element 7 has two projections 13 on the left side, which are offset by 180° from one another in the circumferential direction of the plastic element 7. Figure 3 shows a cross-section of the projections 13. In Figure 2, only one of the projections 13 is indicated schematically. The projections can, for example, be casting noses created during the injection molding process. However, they can also be formed in other ways.As will be explained in more detail below, the projections 13 serve as stops or anti-tilt pins.

[0036] The plastic material of the plastic element 7 is selected with regard to its damping properties and preferably consists of a polymer, in particular polyurethane. The material forming the plastic element 7 should have a Shore A hardness of 60 to 85°, preferably 70 to 80°, in particular 73 to 75°, and particularly preferably approximately 74°. The plastic element, particularly in the area between the first and second tubular elements, has a material thickness that is greater than the material thickness of the first and / or second tubular elements. The material thickness, in combination with the choice of material and the hardness of the material, essentially define the damping properties of the receptacle 1.

[0037] Although not shown in the figures, the second tubular element 5 can have a contour on its outer circumference that at least partially accommodates the plastic element, such as a circumferential groove, or a contour that extends at least partially into the plastic element, such as a circumferential projection. For example, circumferential ribs can be provided on the outer circumference of the second tubular element. These provide a particularly secure fixation of the second tubular element 5 with respect to the first tubular element 3.

[0038] Figure 4 shows the receptacle 1 again in section, similar to Figure 3, with an exemplary uniball joint 15 accommodated therein. If the uniball joint 15 is accommodated in the second tubular element in the manner shown, in particular is pressed therewith, the elements together form a joint arrangement for a body-side joint receptacle of a wishbone, in particular a support arm.

[0039] The uniball joint 15, which is shown only as an example, essentially comprises a tubular element 17, a bearing element 18, a ball element 19, a bushing 20, and sleeves 22.

[0040] The tubular element 17 is made of a suitable rigid material, in particular metal, and has an outer circumference suitable for being received in the second tubular element 5, preferably by means of a press fit. However, other types of fixing the uniball joint 15 within the second tubular element 5 are also conceivable and possible, such as a screw connection. The outer circumference of the tubular element 17 is further contoured such that it tapers from a central region towards the ends, then forms a region of constant diameter and has a projection at the very end. This forms a substantially circumferential groove at the end regions, which serves to receive an end region of one of the sleeves 22, as shown.

[0041] The inner circumference of the tubular element 17 is also contoured and has a circumferential recess, particularly in the central region. This serves to accommodate the bearing element 18, as can be seen in Figure 4. Furthermore, the inner circumference of the tubular element 17 widens slightly toward its ends. The bearing element is received in the recess on the inner circumference of the tubular element 17 and has an at least partially inner contour that is adapted to the contour of the ball element 19. The bearing element 18 is made of a material that enables smooth sliding movement of the ball element 19 relative to the bearing element 18.

[0042] The ball element 19 is preferably made of metal or another suitable material and has a through-opening in which the bushing 20 is received. The bushing 20 can be secured in any manner in the through-opening of the ball element 20.

[0043] The bushing 20 is again preferably made of metal and has two radially circumferential projections 25 at its opposite ends, which form a receptacle for an end region of a respective one of the sleeves 22 therebetween.

[0044] The sleeves 22 are made of a suitable plastic material. One sleeve 22 is provided at each end of the uniball joint 15, such that a first end of the sleeve 22 is fixed to the outer circumference of the tubular element 17, for example by a corresponding clamping element (not shown), and the other end is fixed to the passage 20, again for example by a clamping element (not shown), such as a clamping ring. The sleeves 22 seal the space between the outer circumference of the passage 20 and the inner circumference of the tubular element 17, in which the ball element 19 is also accommodated. This space serves, for example, as a receiving space for a lubricant, such as grease.

[0045] As can be seen from the illustration in Figure 4, the bushing 20 can tilt essentially freely relative to a center point of the ball element 19. Movement is limited only by the inner circumference of the tubular element 17. Furthermore, however, the bushing 20 can also rotate about its longitudinal center axis if the ball element 19 rotates accordingly in the bearing element 18.

[0046] The joint arrangement shown in Figure 4 is intended for a body-side joint mount for a wishbone, in particular a support arm. Mobility of the bushing 20, through which a corresponding body fastening member can extend, is provided by the uniball joint 15, while shock absorption is absorbed by the plastic element 7. This prevents fatigue phenomena such as those that occur with a pure rubber mount, particularly due to pivoting and torsional forces within the rubber mount, since corresponding torsional forces are absorbed by the bearing properties of the uniball joint and do not impair its functionality. Shock absorption, on the other hand, is essentially absorbed by the plastic element 7, which can be optimized for these properties since it does not need to allow any pivoting and / or torsional movements.Thus, damping is essentially completely decoupled from mobility, and they do not influence each other. Simultaneous pivoting and / or torsional movements also have no negative effect, and they do not influence each other.

[0047] As can be seen in Figure 4, the uniball joint has a length that is greater than the second tube element 5 but shorter than the first tube element 3.

[0048] In order to extend the central opening formed by the passage 20 beyond the tubular element 3, optional end caps are provided, which are explained in more detail below with reference to Figures 5 to 9.

[0049] Figures 5 and 6 show a first end cap 30, which has a substantially circularly symmetrical shape. The end cap 30 has a first, flat side 32 and an opposite, contoured side 33. Furthermore, the end cap 30 has a through-opening 34, which has an inner diameter substantially equal to the through-opening of the feedthrough 20. A circularly symmetrical projection 35 is provided on the side 33 and surrounds the through-opening 34. The circularly symmetrical projection 35 is dimensioned such that it can be placed onto one of the projections 25 on the feedthrough 20, preferably such that it can be placed by hand and is initially held in this position without the application of external forces.

[0050] Figures 7 and 8 show a further end cap 40 which, as shown, has two round sections 42 and flat sections 44 on the outer circumference connecting the round sections 42. The end cap 40, also referred to as an anti-tip filler piece 40, in turn has a through-opening 45 which has a diameter substantially equal to that of the through-opening of the feedthrough 20. The end cap 40 also has a first, flat side 46 and a contoured, second side 47. The second side 47 has an annular projection 48, which in turn can be placed onto one of the projections 25 on the feedthrough 20, preferably in such a way that the end cap 40 is initially held in this position without the application of forces. This serves for pre-assembly, as with the end cap 30. Figure 9 shows the joint arrangement according to Figure 4 with the end caps in place.The end cap 30 is applied to the left-hand side according to Figure 9, i.e., the side that does not have any projections 13. The end cap 40 is arranged on the right-hand side in Figure 9 and is placed on such that the round sections 42 on the outer circumference are aligned with the projections 13 on the plastic element 7. As a result, a tilting movement of the feedthrough 20 with respect to a center point of the spherical element 19 can be restricted in this partial area, as can be clearly seen in Figure 9. In particular, tilting of the feedthrough 20 upwards or downwards is significantly restricted. Tilting of the feedthrough 20 in a direction perpendicular to the up / down movement would not be restricted by the projections 13 and would be possible over a larger area, as the person skilled in the art can immediately recognize.

[0051] Figures 10 to 12 show a top view, a side view, and a rear view of a support arm 50, which is shown only very schematically. The support arm 50 is made of a suitable material and has a body-side joint mount 51, a wheel-side joint mount 53, and an optional shock absorber mount 55.

[0052] The structure of a corresponding control arm is well known and therefore will not be explained in detail. The body-side joint mount 51 is dimensioned such that it tightly accommodates the first tubular element 3 of the mount 1. In particular, the mount 1 can preferably be accommodated by a press fit within the body-side joint mount 51 of the control arm 50. During installation, the projections 13 should be aligned so that they are at the top or bottom, or in other words, with the control arm in its normal alignment, essentially on a vertical axis.

[0053] In the illustration according to Figure 10, the ball element of the uniball joint is schematically indicated, around which the support arm can pivot transversely to its longitudinal extent, as shown by the arrows A. A corresponding pivoting of the support arm is made possible by a tilting movement of the passage 20 in the uniball joint 15, as the person skilled in the art will recognize.

[0054] Figure 11 shows how the support arm 50 can move up and down around a center point of the schematically indicated ball element 19 of the uniball joint. A corresponding up and down movement of the support arm, which can also be referred to as a torsional movement, is made possible by a rotational movement of the ball element 19 with respect to the bearing element 18. The corresponding movement is shown by the arrows B. The rear view according to Figure 12 shows a lateral tilting movement of the support arm. This is in turn made possible by tilting / pivoting the feedthrough 20 of the uniball joint 15. A corresponding tilting / pivoting is indicated by the arrows C in Figure 12. The corresponding tilting in turn occurs around a center point of the ball element 19.If the joint arrangement were correctly installed, as shown in Figure 9, the projections 13 would each lie on a vertical axis, so that the end cap 40 would severely restrict a corresponding tilting movement according to Figure 12. A corresponding movement according to the arrows C would therefore only be possible, if at all, over a small angular range of ± 1° to ± 3° and preferably approximately ± 2° from the central position of the joint arrangement.

[0055] A pivoting or torsional movement according to the arrows B in Figure 11 is again essentially not restricted by the uniball joint 15, but is usually restricted by other components of the vehicle to ±5° to ±20°, in particular approximately ±10° from the central position of the joint arrangement.

[0056] A pivoting movement according to arrows A is limited outside the area of ​​the projections 13 of the plastic element 7 by the shape of the end caps 30, 40 to ± 5° to ± 10°, in particular approximately ± 7°, from the center position of the joint arrangement. Of course, other limitations for the pivoting, torsional, or tilting movement can also be provided; in particular, the limitations can also be non-symmetrical with respect to the center position.

[0057] The invention has been explained in more detail above using preferred embodiments without being limited to the specific embodiment. In particular, the structure of the uniball joint 15 may differ from the illustrated structure. The shape of the wishbone according to Figures 10 to 12 is also only schematic and is not intended to be limiting. In particular, the wishbone could also have only one body-side and one wheel-side joint mount, or could have additional joint mounts besides those schematically illustrated.

[0058] In deviation from the claims, the first tubular element 3 could also be omitted, so that the plastic element 7 is preferably introduced directly into a wishbone with tubular element 5 (for example, by injection molding). Alternatively or additionally, it would also be conceivable to omit the second tubular element 5, so that the tubular element 17 of the uniball joint is in direct contact with the plastic element 7. Although this would complicate the replacement of the elements, it would still enable the advantages of an optimizable function with regard to damping on the one hand and mobility on the other.

Claims

Patent claims 1. A holder for a uniball joint for installation in a body-side joint holder of a wishbone, in particular a support arm, comprising: a first tubular element; a second tubular element which is arranged concentrically in the first tubular element; and a plastic element between the first and second tubular elements, which completely surrounds the second tubular element in the radial direction and arranges and fixes the second tubular element in the first tubular element such that the second tubular element is completely received in the first tubular element, wherein the first tubular element has external dimensions which are suitable for a tight fit in a body-side joint holder of a wishbone, wherein the second tubular element has internal dimensions which are suitable for a fixed but detachable reception of a uniball joint, and wherein the plastic element has a predetermined hardness for providing damping against relative movement between the tubular elements.

2. Receptacle according to claim 1, wherein the second tubular element has a shorter length than the first tubular element.

3. A mount according to claim 1 or 2, wherein the outer dimensions of the first tubular element are suitable for a tight fit by means of a press fit in the body-side joint mount of a wishbone.

4. Receptacle according to one of the preceding claims, wherein the internal dimensions of the second tubular element are suitable for the fixed but detachable reception of a uniball joint by means of a press fit 5. Receptacle according to one of the preceding claims, wherein the first and / or the second tubular element are made of metal.

6. Receptacle according to one of the preceding claims, wherein the second tubular element has a shorter length than the first tubular element and / or the second tubular element is received centrally in the longitudinal direction of the first tubular element.

7. Receptacle according to one of the preceding claims, wherein the first tubular element has a contour on the inner circumference for at least partially receiving the plastic element.

8. Receptacle according to claim 7, wherein the contour for at least partially receiving the plastic element is designed in the form of a circumferential groove.

9. Receptacle according to one of the preceding claims, wherein the second tubular element has a contour on the outer circumference for at least partially receiving the plastic element.

10. Receptacle according to claim 9, wherein the contour on the outer circumference of the second tubular element is formed in the form of a circumferential groove.

11. Receptacle according to one of claims 7 to 10, wherein the contour for at least partially receiving the plastic element is formed centrally in the longitudinal direction.

12. Receptacle according to one of the preceding claims, wherein the plastic element extends substantially over the entire length of the first tubular element and is in contact with the inner circumference, wherein the plastic element has a uniform thickness over the length of the second tubular element and / or tapers in the region of the longitudinal ends.

13. Receptacle according to one of the preceding claims, wherein the plastic element has a substantially axially symmetrical shape, wherein two radially inwardly projecting stops are formed in at least one end region.

14. A receptacle according to any one of the preceding claims, wherein the plastic element consists of a polymer.

15. A receptacle according to claim 15, wherein the polymer is polyurethane.

16. Receptacle according to one of the preceding claims, wherein the plastic element has a Shore A hardness of 60-85°, preferably of 70-80°, in particular of 73-75° and particularly preferably of approximately 74°.

17. Receptacle according to one of the preceding claims, wherein the plastic element has a material thickness that is greater than the material thickness of the first and / or the second tubular element.

18. Joint arrangement for a body-side joint mount of a wishbone, in particular a support arm, comprising: a mount according to one of the preceding claims; and a uniball joint which is fixedly but releasably received in the second tubular element, wherein the uniball joint has a central passage for receiving and guiding a leg of a fastening element, wherein the passage is tiltable with respect to a tilting point and rotatable about its longitudinal axis.

19. A joint assembly according to claim 18, wherein the uniball joint is received in the second tubular member in a fixed but releasable manner by means of an interference fit.

20. The joint assembly of claim 18 or 19, wherein the uniball joint has a length that is less than the length of the first tubular member, the joint assembly further comprising two end caps that can be placed on opposite ends of the uniball joint, the end caps each having a passage that, when the end caps are in place, is aligned with the passage in the uniball joint to jointly provide an extended passage, the end caps having outer dimensions that fit with play into the inner circumference of the first tubular member and a length that is dimensioned such that the end caps, when in place, protrude longitudinally beyond the first tubular member.

21. The joint assembly of claim 20, wherein at least one of the end caps has outer dimensions that limit tilting of a received leg at least within a predetermined angular range.

22. A wishbone, in particular a support arm, with a body-side joint receptacle having a joint arrangement according to one of claims 18 to 21, which is fixedly but detachably received in the joint receptacle.

23. Control arm, in particular support arm, according to claim 22, wherein the joint arrangement is received in the joint receptacle by means of a press fit.

24. A control arm according to claim 22 or 23, wherein the first tubular element extends through the joint socket and projects beyond the ends thereof.

25. Control arm, in particular support arm with a body-side joint receptacle in which at least one plastic element is received, via which a uniball joint is positioned and fixed directly or indirectly in the joint receptacle.

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