Vibration decoupling sleeve, and fastening device comprising a vibration decoupling sleeve

Abstract

The invention relates to a vibration decoupling sleeve (10) comprising: axial end sides (12, 14) that face in opposite directions; a central opening (16) which is defined by a radial inner side (18); an outer side (20) which delimits the vibration decoupling sleeve (10) on the outside; and a peripheral receiving groove (22) on the outer side (20), which groove is delimited by two opposing axial groove-delimiting sides (24, 26) and a groove bottom (28), wherein the groove-delimiting sides (24, 26), the radial inner side (18) and the axial end sides (12, 14) define abutments against a mounting part on the one hand and, on the other hand, against a component which is to be decoupled from the mounting part in terms of vibration and is to be fastened to the mounting part. The vibration decoupling sleeve (10) comprises a sleeve-shaped core portion made of an elastomeric material from which one or more projections (32, 34, 36, 38, 43) project in order to form at least one of the abutments, which projections taper, as seen in axial section, towards their end furthest from the core portion and merge integrally into said core portion. The invention also relates to a fastening device comprising such a vibration decoupling sleeve (10).

Description

[0001] Vibration decoupling sleeve and fastening device with a vibration decoupling sleeve

[0002] The invention relates to a vibration decoupling sleeve with axial end faces pointing in opposite directions, a central opening defined by a radial inner side, an outer side defining the vibration decoupling sleeve on the outside, and a circumferential receiving groove on the outside, which is defined by two opposing axial groove delimiting sides and a groove base. The groove delimiting sides, the radial inner side, and the axial end faces define abutments, on the one hand, on a mounting part and, on the other hand, on a component to be vibrationally decoupled from the mounting part and to be fastened to the mounting part. Furthermore, the invention relates to a fastening device for fastening a component, in particular a vehicle display, to a mounting part, in particular a vehicle structure, having such a vibration decoupling sleeve.

[0003] Vibration decoupling sleeves are used in vehicles, particularly motorcycles, but also in cars and trucks, to protect add-on parts attached to the vehicle structure from vibrations. Figure 1 shows such a vibration decoupling sleeve 1 made of an elastomer material according to the prior art. The vibration decoupling sleeve 1 has a central opening 2 in which a cylindrical fastening bolt can be received, and two axial end faces 3, 4 pointing in opposite directions. A circumferential receiving groove 6 is provided in an outer side 5, which is delimited by two opposite axial groove limiting sides 7 and a groove base 8. The vibration decoupling sleeve 1 is inserted with the receiving groove 6 into a recess in the vehicle structure, with the vehicle structure ideally protruding into the receiving groove 6 up to the groove base 8.The fastening bolt is attached to the component to be fastened. It extends through the central opening 2 and is secured to the end 3 of the vibration decoupling sleeve 1 opposite the component, e.g., using a locking ring. The problem here is that various types of vibrations occur during vehicle operation. For example, the vehicle's drive system typically produces vibrations with a higher frequency in the range of approximately 1 kHz and low amplitudes in both the radial and axial directions. However, due to the road surface, low-frequency vibrations tend to occur, albeit with high amplitudes.

[0004] To effectively isolate low-amplitude engine vibrations, the vibration decoupling sleeve 1 should have the lowest possible rigidity, i.e., be made of the softest possible material. In contrast, to isolate the high-amplitude excitations caused by the road surface, the highest possible rigidity of the vibration decoupling sleeve 1 is required. Furthermore, the service life can be extended by using the highest possible Shore hardness of the material used.

[0005] Thus, the known vibration decoupling sleeve 1 can only be optimized for one type of vibration, which can lead to damage to both the vibration decoupling sleeve 1 and the component attached to the vehicle. Furthermore, due to tolerances in the structure supporting the sleeve and the other components, a perfect fit of the vibration decoupling sleeve is often not achieved, preventing it from achieving its optimal effect.

[0006] It is therefore an object of the invention to provide a vibration decoupling sleeve or a fastening device in which the problems known from the prior art are avoided.

[0007] According to a first aspect of the invention, a vibration decoupling sleeve of the type mentioned at the outset is provided for this purpose, wherein the vibration decoupling sleeve comprises a sleeve-shaped core section made of an elastomeric material, from which one or more projections project to form at least one of the systems, which projections, viewed in axial section, taper towards their end furthest from the core section and merge integrally into the core section.

[0008] Due to the tapered projections, the respective systems have a smaller contact area when installed compared to the prior art. Therefore, the vibration decoupling sleeve according to the invention has low rigidity for low-amplitude vibrations, which occur due to engine vibrations and have a relatively high frequency of approximately 1 kHz, since only (partially) the tapered projections and thus only a small amount of the elastomeric material are compressed.

[0009] If (additional) high-amplitude vibrations occur, which are caused by road surface excitation, for example due to unevenness or potholes, the vibration decoupling sleeve offers greater rigidity to decouple these high-amplitude vibrations, since more and more material has to be compressed as the vibration amplitude increases due to the increase in the cross-section of the projections towards the core section.

[0010] Thus, the geometric design of the vibration decoupling sleeve according to the invention achieves amplitude-dependent stiffness with a uniform Shore hardness of the elastomer material used. This allows for optimal decoupling of both low-amplitude vibrations caused by the vehicle's drive and higher-amplitude vibrations caused by road excitation, preventing damage to the vehicle components and the vibration decoupling sleeve itself.

[0011] Furthermore, the vibration decoupling sleeve according to the invention can be made of an elastomeric material with a higher Shore hardness than was the case in the prior art, since the geometric design with the tapered projections ensures the required low rigidity against higher-frequency, low-amplitude vibrations. This has a positive effect on the service life of the vibration decoupling sleeve.

[0012] In addition to the aforementioned applications in all types of vehicles, the vibration decoupling sleeve according to the invention can also be advantageously used in other areas where components need to be protected from vibrations, for example, in wind turbines or similar devices. Preferably, at least one of the components is formed by a closed, annular projection. This results in a simple-to-manufacture design that achieves the desired gradation of stiffness depending on the amplitude of the vibrations occurring.

[0013] In a preferred embodiment, at least one of the abutments is formed by a plurality of circumferentially spaced projections, in particular crenellated projections, wherein the projections are arranged along an imaginary circular ring. The design with a plurality of circumferentially spaced projections allows for even more precise adjustment of the rigidity.

[0014] In particular, it is possible to precisely adjust both the height and width of the protrusions in the circumferential direction to the respective application. By varying the height of the protrusions, the transition point from the low-stiffness range to the high-stiffness range can be adjusted as desired; by varying the width of the individual crenellated protrusions, the stiffness value in the low-stiffness range can be influenced.

[0015] Of course, several of the abutments can be formed by several circumferentially spaced projections, for example, on one of the axial end faces and at least one axial groove boundary side. Advantageously, both a abutment for the component to be fastened and a abutment for the mounting part are formed by several circumferentially spaced projections. This ensures optimal vibration decoupling in the axial direction for both components.

[0016] According to a preferred embodiment, the contact surface is designed as a projection, in particular a closed, annular projection, on an axial end side, in particular on the end side which bears against the component to be fastened. According to a preferred embodiment, the projection borders directly or almost directly on the central opening. In other words, according to a preferred embodiment, the annular projection has a diameter which is smaller or significantly smaller than the diameter of the vibration decoupling sleeve. This advantageously allows the contact surface or its diameter to be reduced, whereby the vibration decoupling sleeve is also suitable for use in smaller installation spaces. The contact surface can also comprise a plurality of projections which are arranged in a ring shape with the smaller diameter.

[0017] In a further development of the invention, the radial inner side has several axially spaced, tapered projections, each located on an imaginary circular ring. In this design, the vibration decoupling sleeve, in the resting state, rests only with the projections on a typically cylindrical fastening bolt that fastens the component to the support member. This also provides a rigidity in the radial direction that is adapted to the respective amplitude of the various types of vibration occurring during operation. This means that a low rigidity is achieved for higher-frequency vibrations with a small amplitude, which are excited by the engine, and a comparatively high rigidity is achieved for low-frequency vibrations with a large amplitude, which occur, for example, due to the road surface.

[0018] In a preferred embodiment, one or more tapered projections are provided on one, in particular a single, axial end face. This end face then forms, for example, a contact point with the component to be fastened or the mounting part.

[0019] In particular, several tapered projections are provided here, which are circumferentially spaced and lie along an imaginary circular ring.

[0020] In a particularly advantageous embodiment, the vibration decoupling sleeve comprises a base part made of elastomeric material, which comprises the core section and the tapered projections, and a protective disk, wherein the protective disk is made of a material that is harder than that of the base part and is fastened to an axial end face of the base part. The protective disk is firmly connected to the base part, for example glued into it or vulcanized into the elastomer material, and serves to protect the surface of the vibration decoupling sleeve, e.g. from damage caused by a metallic fastening element arranged in this area. Preferably, one or more tapered projections are provided on at least one, in particular on both axial groove boundary sides, said projections extending axially towards the opposite groove boundary side.The groove serves to accommodate the mounting part or component by providing a preferably circular opening in the mounting part or component into which the vibration isolation sleeve is inserted and snapped in. The tapered projections in this contact area provide the vibration isolation sleeve with a rigidity adapted to the respective amplitude of the vibrations occurring.

[0021] In a particularly preferred embodiment, one axial groove boundary side has several projections extending along an imaginary ring, and the other groove boundary side has a circumferentially encircling annular projection. Such a configuration has proven particularly advantageous.

[0022] In addition, the projections on both opposing axial groove boundary sides in the transition area from each groove boundary side to the groove base result in an advantageous geometry in which the "edge" in axial section is not formed by a right angle, but rather by a pitch circle radius. With this design, in the event of sharp edges on the component accommodated in the groove (i.e., the component or the mounting part), no or significantly less damage to the vibration isolation sleeve occurs than was the case with the vibration isolation sleeve with a right-angled abutting edge known from the prior art.

[0023] A particularly good adaptability of the stiffness to different amplitudes of the occurring vibrations can be achieved by the projections having a rounded free end and / or a triangular or trapezoidal cross-section seen in axial section.

[0024] According to a second aspect of the invention, a fastening device is provided for fastening a component, in particular a vehicle display, to a support part, in particular a vehicle structure. The fastening device has a vibration decoupling sleeve as previously described, a cylindrical fastening bolt that projects into the opening of the vibration decoupling sleeve and is clamped therein, a C-shaped, slotted locking ring that is partially received in a groove on the cylindrical fastening bolt and presses against an axial end side of the vibration decoupling sleeve, and a support surface each on the component and on the support part, wherein one support surface presses against the other axial end side of the vibration decoupling sleeve and the other support surface presses against a groove boundary side, in particular wherein the projection(s) are prestressed and partially compressed.

[0025] For the purposes of the invention, "partially compressed" means that the projections are still present or recognizable as such. Due to the preload of the projections, which is particularly present in both the axial and radial directions when at rest, an ideal, positive fit of the vibration isolation sleeve is ensured within the defined tolerances of the supporting structures, thus ensuring its full effectiveness.

[0026] Preferably, the cylindrical fastening bolt is designed as one piece with the component and is inserted into the central opening of the vibration decoupling sleeve, which in turn is inserted into a circular opening on the support part, the edge of which projects into the groove in the outer side of the vibration decoupling sleeve, so that one or both groove boundary sides are supported on the support part.

[0027] At the end of the fastening bolt farthest from the component, a slotted locking ring is provided, which presses against the axial end of the vibration isolation sleeve, to which the protective disk made of harder material is attached. The other axial end of the vibration isolation sleeve rests against the component.

[0028] Furthermore, all developments and advantages described with reference to the vibration decoupling sleeve according to the invention also apply to the fastening device according to the invention, and vice versa. Further features and advantages will become apparent from the following description of a preferred embodiment with reference to the accompanying drawings. These show:

[0029] - Figure 1 is a perspective view of a vibration decoupling sleeve according to the prior art;

[0030] - Figure 2 is a perspective view of a vibration decoupling sleeve according to the invention;

[0031] - Figure 3 is a perspective sectional view of the vibration decoupling sleeve of Figure 2;

[0032] - Figure 4 shows an axial section through the vibration decoupling sleeve of Figures 2 and 3;

[0033] - Figure 5 is a plan view of an axial end side of the vibration decoupling sleeve of Figures 2 to 4;

[0034] - Figure 6 is a plan view of the other axial end side of the vibration decoupling sleeve of Figures 2 to 5; and

[0035] - Figure 7 is a perspective view, partially in section, of a fastening device according to the invention, in which the vibration decoupling sleeve of Figures 2 to 6 is used.

[0036] Figures 2 to 6 show a vibration decoupling sleeve 10 according to the invention, which is used in a fastening device with which a component, in particular a vehicle display, is fixed to a support part, in particular a vehicle structure.

[0037] The vibration decoupling sleeve 10 has two axial end sides 12, 14 pointing in opposite directions and a central opening 16 which is defined by a radial inner side 18.

[0038] Furthermore, the vibration decoupling sleeve 10 has an outer side 20 defining its outer side, on which a circumferential receiving groove 22 is provided. The receiving groove 22 is defined by two opposing axial groove delimiting sides 24, 26 and a groove base 28. The groove delimiting sides 24, 26, the radial inner side 18, and the axial end sides 12, 14 define the contact points with the support part and the component to be fastened to the support part, whereby the component is to be vibrationally decoupled from the support part during fastening.

[0039] For this purpose, the vibration decoupling sleeve 10 comprises a sleeve-shaped core section 30 made of an elastomeric material (see in particular Figures 3 and 4), wherein a plurality of projections 32, 34, 36, 38, 42 protrude from the sleeve-shaped core section 30, which projections merge integrally into the core section 30 and, viewed in axial section, each taper towards their end furthest from the core section 30.

[0040] A first group of several, here four, tapered projections 32 is provided on the axial end face 14, wherein the projections 32 are circumferentially spaced from one another and are crenellated. The projections 32 are evenly distributed along an imaginary circular ring, as can be seen in particular in Figure 6.

[0041] The projections 32 have a substantially triangular or trapezoidal cross-section in axial section and rounded free ends. They are also trapezoidal in plan view in axial direction A with rounded corners (see Figure 6).

[0042] A second group of tapered projections 34 is provided on the upper axial groove boundary side 24 in Figures 2 to 4. These projections 34 also extend along an imaginary circular ring and are circumferentially spaced from one another and have a crenellated design. Again, four projections 34 are provided, which are geometrically similar to the projections 32 and are located at the same positions in the circumferential direction U as these. Alternatively, the projections 32 and 34 could also be offset in the circumferential direction U.

[0043] It should be noted that instead of the design shown here with four crenellated projections 32, 34 each, each extending in the circumferential direction U over an angular range of approximately 45° of the imaginary circular ring, more or fewer projections 32, 34 can also be provided. It is also conceivable to provide a single, closed, annular projection 32, 34 in each case.

[0044] The lower groove boundary side 26 in Figures 2 to 4 has a single circumferentially extending annular projection 36, wherein both the projections 34 and the projection 36 extend in the axial direction A toward the respective opposite groove boundary side 26 or 24. The projection 36 also has a substantially trapezoidal cross-section as seen in axial section, as well as rounded free ends.

[0045] In addition, the groove base 28 has a projection 38 which tapers towards the outer side 20 of the vibration decoupling sleeve 10 and which is essentially annular and runs in a closed annular manner.

[0046] This results in annular recesses 40 in the areas in which an axial groove limiting side 24 or 26 and the groove base 28 meet or merge into one another, which run circumferentially around the vibration decoupling sleeve 10 and are delimited in the axial section (Figures 3 and 4) by a three-quarter circular line.

[0047] As can be seen particularly from the sectional views of Figures 3 and 4, the radial inner side 18 also has several, here two, axially spaced, tapered projections 42, each of which lies on an imaginary circular ring. The projections 42 have a substantially trapezoidal cross-section when viewed in axial section.

[0048] Since the associated fastening bolt has a substantially circular-cylindrical shape, only the projections 42 rest on the fastening bolt in the installed state, which results in a low stiffness of the vibration decoupling sleeve 10 even in the radial direction for higher-frequency vibrations with low amplitude, such as those excited by the drive of the vehicle.

[0049] The height of the projections 32, 34, 36, 38, 42 is each a maximum of 1 mm, preferably approximately 0.8 mm. The sleeve-shaped core section 30 and the tapered projections 32, 34, 36, 38, 42 integrally formed thereon together form a solid base part 44 made of elastomeric material.

[0050] In the area of ​​the upper axial end face 12 shown in Figures 2 to 4, a protective disk 46 is attached to an axial end face 48 of the base part 44. This protective disk consists of a material that is harder than the material of the base part 44. For example, aluminum or a plastic with a greater Shore hardness than the base part 44 is used here. The protective disk 46 can be glued to the base part 44 or vulcanized into the material of the base part 44 (see especially Figure 5).

[0051] Figure 7 shows the use of the vibration decoupling sleeve 10 in a fastening device 50. This serves to fasten a component 52, here a vehicle display for a motorcycle, to a mounting part 54, here a vehicle structure, which is only indicated schematically in Figure 7.

[0052] The component 52 and the support part 54 should be decoupled from each other in terms of vibration in order to prevent damage to the component 52 due to high vibration couplings, which occur on the one hand due to engine vibrations and on the other hand due to road-specific vibrations.

[0053] The fastening device 50 has a cylindrical fastening bolt 56 that is integrally formed with the component 52. Alternatively, the fastening bolt 56 can also be designed as a separate component.

[0054] For the vibration-decoupled fixing of the component 52 to the support part 54, the vibration-decoupling sleeve 10 is inserted into a circular opening 58 of the support part 54 such that the area of ​​the plate-like support part 54 surrounding the opening 58 projects into the receiving groove 22 on the outer side 20 of the vibration-decoupling sleeve 10.

[0055] The cylindrical fastening bolt 56 is inserted into the central opening 16 of the vibration decoupling sleeve 10 and clamped therein.

[0056] To secure the fastening bolt 56, a C-shaped, slotted locking ring 60 made of metal is provided, which is partially received in a groove 62 located at the end of the fastening bolt 56 furthest from the component 52. In addition, the slotted locking ring 60 presses against the axial end face 12 of the vibration decoupling sleeve 10, on which the protective disk 46 is arranged.

[0057] Since the locking ring 60 can have sharp edges, the protective disk 46 made of harder material ensures that the elastomer material of the vibration decoupling sleeve 10 is not damaged by vibrations or deformations occurring during operation, especially if the locking ring 60 does not lie completely flat on the axial end side 12, but is slightly inclined relative to it.

[0058] The other axial end side 14 of the vibration decoupling sleeve 10, which has the tapered projections 32, presses against a support surface 64 formed on the component 52, while the projections 34 of the groove limiting side 24 press against a support surface 66 on the holding part 54.

[0059] According to one embodiment, the contact surface on the end face 14 is designed as a particularly closed, annular projection (not shown here), which directly adjoins or borders the central opening 30. The diameter is therefore advantageously significantly smaller than the diameter of the base part 44, which advantageously allows the contact or contact surface to be reduced. This is particularly advantageous when, for example, the bearing surface 64 is very small. The contact surface can also be formed by a plurality of projections arranged in the smaller diameter.

[0060] In the installed state shown in Figure 7, all tapered projections 32, 34, 36, 38, 42 are preloaded and partially compressed, ensuring optimal performance of the vibration decoupling sleeve 10, virtually independent of the tolerances of the interconnected components. Undesirable play is effectively prevented.

[0061] During operation of the vehicle in which the fastening device 50 with the vibration decoupling sleeve 10 is used, vibrations occur, whereby on the one hand the drive of the vehicle excites vibrations with a higher frequency in the range of approximately 1 kHz, but with a low amplitude of a few tenths of a millimeter, and on the other hand vibrations with a lower frequency, but with a comparatively high amplitude, occur due to the condition of the road surface.

[0062] The vibration decoupling sleeve 10 ensures reliable decoupling of the component 52 and the support part 54 and thus prevents damage to the component 52.

[0063] In contrast to the vibration decoupling sleeve 1 known from the prior art, in which all contact surfaces are formed over the entire surface, the vibration decoupling sleeve 10 according to the invention rests on all components involved with only comparatively small contact surfaces due to the tapered projections 32, 34, 36, 38, 42 in the installed state.

[0064] Therefore, the vibration decoupling sleeve 10 has a low stiffness for small amplitude vibrations, such as those caused by the vehicle drive, both in the axial direction (via the projections 32, 34 and 36) and in the radial direction (projections 42), and can have an optimal vibration decoupling effect in this area.

[0065] However, if (additionally) low-frequency vibrations with a large amplitude occur due to the road surface condition, the projections 32, 34, 36, 38, 42 are or will be largely compressed in both the axial and radial directions, which is why the vibration decoupling sleeve 10 counteracts these vibrations with greater rigidity.

[0066] Therefore, with the vibration decoupling sleeve 10 according to the invention, with a uniform Shore hardness of the elastomer material of the base part 44, both vibrations with low and with high amplitude can be optimally decoupled.

[0067] Due to the design of the receiving groove 22 with the circular recesses 40, which represent an optimized corner geometry, it is also ensured that in the case of a sharp-edged design of the holding part 54 in the area of ​​the opening 58, damage to the vibration decoupling sleeve 10 in this area is avoided due to the vibration-induced deformations occurring during operation, as occurred with previous vibration decoupling sleeves with a straight edge.

[0068] In addition, in the vibration decoupling sleeve 10 according to the invention, different stiffnesses can be achieved by adapting the dimensions of the projections 32, 34, 36, 38, 42 to the respective application.

[0069] By varying the height of the projections 32, 34, 36, 38, 42, the transition point from the area of ​​low stiffness to the area of ​​high stiffness can be adjusted as desired.

[0070] By varying the width of the individual crenellated projections 32, 34, the magnitude of the stiffness in the range of low stiffness can be influenced.

[0071] With the vibration decoupling sleeve 10 according to the invention, both higher-frequency vibration couplings with low amplitude and low-frequency vibration couplings with higher amplitude can be reduced or compensated. The base part 44 of the vibration decoupling sleeve 10 has a uniform Shore hardness, which can also be designed to be as high as possible to achieve a long service life. Nevertheless, the tapered projections 32, 34, 36, 38, 42 ensure that the vibration decoupling sleeve 10 has sufficiently low rigidity for higher-frequency vibration couplings due to the vehicle drive.

Claims

Patent claims 1. Vibration decoupling sleeve with axial end faces (12, 14) pointing in opposite directions, a central opening (16) defined by a radial inner surface (18), an outer surface (20) bounding the vibration decoupling sleeve (10) on the outside, and a circumferential receiving groove (22) on the outer surface (20) bounded by two opposing axial groove boundary faces (24, 26) and a groove base (28), wherein the groove boundary faces (24, 26), the radial inner surface (18), and the axial end faces (12, 14) define contact on one side with a mounting part (54) and on the other side with a component (52) to be vibrationally decoupled from the mounting part (54) and attached to the mounting part (54), characterized in that the vibration decoupling sleeve (10) comprises a sleeve-shaped core section (30) made of an elastomeric material, from which to Formation of at least one of the systems, one or more of them, seen in axial section,Towards their end furthest from the core section (30) project tapering projections (32, 34, 36, 38, 42) which merge seamlessly into the core section (30).

2. Vibration decoupling sleeve according to claim 1, characterized in that at least one of the systems is formed by a closed annular circumferential, annular projection (36, 38, 42).

3. Vibration decoupling sleeve according to claim 1 or 2, characterized in that at least one of the systems is formed by several circumferentially spaced projections (32, 34), in particular crenellated projections (32, 34), wherein the projections (32, 34) lie along an imaginary circular ring.

4. Vibration decoupling sleeve according to one of the preceding claims, characterized in that the radial inner surface (18) has several axially spaced, tapered projections (42) which each lie on an imaginary circular ring.

5. Vibration decoupling sleeve according to one of the preceding claims, characterized in that on one, in particular a single, one or more tapered projections (32) are provided on the axial end side (14).

6. Vibration decoupling sleeve according to one of the preceding claims, characterized in that the vibration decoupling sleeve (10) comprises a base part (44) made of elastomeric material, which includes the core section (30) and the tapered projections (32, 34, 36, 38, 42), and a protective disc (46), wherein the protective disc (46) is made of a material which is harder than that of the base part (44) and is attached to an axial end face (48) of the base part (44).

7. Vibration decoupling sleeve according to one of the preceding claims, characterized in that at least on one, in particular on both axial groove boundary sides (24, 26) one or more tapered projections (34, 36) are provided which extend axially in the direction to the opposite groove boundary side (26, 24).

8. Vibration decoupling sleeve according to claim 7, characterized in that an axial groove limiting side (24) has several projections (34) extending along an imaginary ring and the other groove limiting side (26) has a circumferentially circumferential annular projection (36).

9. Vibration decoupling sleeve according to one of the preceding claims, characterized in that the projections (32, 34, 36, 38, 42) have a rounded free end and / or a triangular or trapezoidal cross-section seen in axial section.

10. Fastening device for attaching a component (52), in particular a vehicle display, to a mounting part (54), in particular a vehicle structure, comprising a vibration decoupling sleeve (10) according to one of the preceding claims, a cylindrical fastening bolt (56) which projects into the opening (16) of the vibration decoupling sleeve (10) and is clamped therein, a C-shaped, slotted locking ring (60) which is partially received in a groove (62) on the cylindrical fastening bolt (56) and presses against an axial end face (12) of the vibration decoupling sleeve (10), and a support surface (64, 66) each on the component (52) and on the mounting part (54), wherein a support surface (64) presses against the other axial end side (14) of the vibration decoupling sleeve (10) and the other support surface (66) against a groove limiting side (24), in particular wherein the projection(s) (32, 34, 36, 38, 42) are pre-stressed and partially compressed.

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