Assembly with elastomer body

Abstract

assembly, comprising a first component (100) with an opening (102) with an inner circumferential surface (104) and a damping device (2) through which a central longitudinal axis (A) penetrates, comprising an inner sleeve (4) with a bore (6) designed for fastening the damping device (2) to a further component (200, 300), and an elastomeric body (8) for attaching the damping device (2) to the first component (100), which surrounds the inner sleeve (4) on its outer circumference, wherein the damping device (2) is designed without an outer sleeve, wherein the damping device (2) has at least one radially outward projecting axial stop (18, 20), wherein one axial stop (18, 20) is arranged on a fold (26) of the elastomer body (8) or in the longitudinal direction (L) adjacent to its fold (26), characterized in that the elastomer body (8) is pre-tensioned against the inner circumferential surface (104) and has an axial stop (18, 20) or at least one of the axial stops (18, 20) mounting slots (22) extending in the radial direction (R).

Description

[0001] The invention relates to an assembly with an elastomer body according to claim 1.

[0002] In practice, it is known to elastically mount one component to another using a spring device. To dampen vibrations, the spring device is fixed in an opening of one of the components, and the other component is then connected to the spring device.

[0003] Assemblies of the type mentioned above are used in motor vehicle construction to reduce the vibration transmitted from one component, for example an engine or a compressor, to another component, for example a vehicle part, during driving or when stationary, and thus to increase driving comfort.

[0004] A disadvantage of this approach, however, is that vulcanization tools sometimes need to be complex and multi-part in order to demold potentially complex geometries of the spring assembly and / or to accommodate numerous inserts within the tool. Such inserts, for example, the outer sleeve of an elastomeric bushing, also present challenges regarding tolerances for a subsequent press fit with a component and for reliable operation. On the other hand, sleeve-free spring assemblies do not offer satisfactory protection against dislodging from the opening.

[0005] From the prior art, assemblies are known, for example, from US 6 302 385 B1 and EP 1 104 853 A1.

[0006] The present invention is therefore based on the objective of creating an assembly that enables improved and at the same time cost-effective manufacturing and assembly, while simultaneously improving and ensuring a secure fit of a damping device during operation.

[0007] The main features of the invention are specified in claim 1. Embodiments are the subject of claims 2 to 9.

[0008] According to the invention, an assembly is therefore proposed comprising a first component with an opening having an inner circumferential surface and a damping device penetrated by a central longitudinal axis, comprising an inner sleeve with a bore designed for fastening the damping device to a further component, and an elastomer body for fastening the damping device to the first component, which surrounds the inner sleeve on its outer circumferential side and is pre-tensioned against the inner circumferential surface, wherein the damping device is designed without an outer sleeve - the outer circumferential surface can be formed, so to speak, by the elastomer body, preferably in the contact areas with the first component, more preferably completely.

[0009] According to the invention, the damping device can be manufactured more cost-effectively simply by eliminating the outer sleeve, allowing the elastomer body to rest directly against the inner circumferential surface (without an intermediate outer sleeve). This results in a less complex vulcanization tool, as only an inner sleeve now needs to be inserted. Overall, the invention reduces the complexity of the vulcanization tool in the manufacturing process. Furthermore, the elimination of the outer sleeve removes the need to maintain tight tolerances for the connection with the first component, for example, by means of an interference fit. Because the elastomer body rests against the first component, its deformability compensates for tolerances. Moreover, reliable crimping of an outer sleeve is no longer required, and the corresponding assembly process no longer needs to be monitored.Only by omitting an outer sleeve does the circumferential area of ​​the elastomer body become at least partially elastomeric, thus allowing for simple adjustment of stiffness ratios in the axial and / or radial direction. The damping device can be designed to be rotationally symmetrical with respect to the central longitudinal axis.

[0010] The opening can be a through-hole, in which case the damping device can advantageously be connected to a component on either side of the through-hole. Alternatively, the opening can be a blind hole, in which case a penetrating or deep opening is not required if the first component does not permit it. The opening can also be a bore.

[0011] The damping device can be inserted or pressed into the opening along an insertion direction, resulting in an interference fit in the latter case. The damping device or its elastomeric body can have a dimensional overlap, preferably in the radial direction, with the opening, which creates a preload and ensures a tight fit of the damping device in the opening while simultaneously compensating for tolerances with respect to the first component. For this purpose, the elastomeric body can, for example, have a diameter, at least in sections, that is larger than the diameter of the opening in the respective contact area during assembly between the first component and the damping device.This press fit allows for design modifications of the opening and / or the elastomer body, thereby influencing both the overall stiffness in the axial and / or radial direction, as well as a specific balance between axial and radial damping behavior. The stiffness ratio can be influenced by various approaches, which are the subject of advantageous designs.

[0012] Ultimately, the damping device can be used to dampen vibrations and oscillations of a component, for example a compressor.

[0013] The term "assembled state" refers to the state in which the damping device is finally held in the opening after installation. The term "unloaded state" refers to the state before assembly. "Diameter" is understood in a mathematical sense as a chord or the length of a chord passing through the center point of the corresponding body. Relationships between the damping device and the first component are generally described in the "assembled state" unless explicitly stated otherwise, for example, in the "pre-assembled state" or "unloaded state." An outer sleeve can be a cylindrical sleeve, made, for example, of plastic or metal, which typically surrounds the elastomer body. The insertion direction is the direction along the central longitudinal axis in which the damping device is inserted into the opening during assembly.Outer sleeve-free means that no outer sleeve covers the elastomer body on its outer circumference.

[0014] According to a further development of the assembly according to the invention, the opening has a radially inwardly projecting circumferential flange, and the elastomer body has a circumferential groove, wherein the circumferential flange can engage positively in the groove. Preferably, a first longitudinal contact length can form along the groove base of the groove and the circumferential flange. The first longitudinal contact length defines the distance in the direction of the central longitudinal axis over which the first component and the elastomer body are in contact with each other in this area. The circumferential flange can be an inner circumferential flange; the groove can be an outer circumferential groove. This flange-groove connection serves to ensure a secure fit of the damping device. The groove can be designed such that it has a groove base and two adjacent groove walls, so that the flange can be engaged on three sides.Thus, a stable seating position can be ensured in two opposite spatial directions along the central longitudinal axis.

[0015] According to a possible further development of the assembly according to the invention, the opening can comprise a cylindrical contact section, i.e., a section of constant diameter, adjacent to, preferably directly adjacent to, the circumferential flange. The elastomer body can bear against this contact section. Furthermore, the opening is thus designed as simply as possible and can still reliably secure the damping device.

[0016] According to a possible further development of the assembly according to the invention, the circumferential flange can have at least one contact surface for the elastomer body, preferably for its groove, wherein the contact surface can have a conical profile. Viewed longitudinally, the contact surface can be tilted in the direction of the central longitudinal axis and in an insertion direction, whereby the contact surface can form an angle with the central longitudinal axis, preferably in the range of 60° to 90° inclusive. This reliably prevents the damping device from disengaging against the insertion direction. Preferably, the assembly has only a single insertion direction. This allows the geometries of the opening and / or the elastomer body to be optimized for their operational functionality without the possibility of insertion from multiple directions having a negative impact.

[0017] According to a possible further development of the assembly according to the invention, the first longitudinal contact length can be in the range of 2 mm to 15 mm. The groove base thus contacts the circumferential flange in the direction of the central longitudinal axis over a distance of 2 mm to 15 mm. This range represents an optimum between sufficient radial stop function (lower limit), in which the elastomer body in the area of ​​its groove base buffers radial contact between the inner sleeve and the flange, and sufficient cost-effectiveness (upper limit), since a first longitudinal contact length of more than 15 mm is only achievable at considerable expense. Certainly, similar effects can be achieved in the respective border regions beyond the aforementioned limits, but possibly in a weakened form.

[0018] According to a possible further development of the assembly according to the invention, the elastomer body can have a radially outwardly projecting circumferential projection which bears against the inner circumferential surface over a second longitudinal contact length of at least 1.5 mm. The circumferential projection thus contacts the inner circumferential surface in the direction of the central longitudinal axis over a distance of at least 1.5 mm. It is conceivable that the second longitudinal contact length lies in the area of ​​the cylindrical contact section, with an additional locking mechanism being formed next to the flange-groove connection. It is also conceivable that the ratio of the length of the opening in the direction of the central longitudinal axis to the second longitudinal contact length is in the range of 2 to 5, preferably 2.5 to 3.5. These dimensions serve, among other things, to ensure a secure and durable fit of the damping device.This second longitudinal contact length also advantageously allows for adjusting the stiffness ratio of the assembly in the axial and radial directions. It is conceivable that the second longitudinal contact length is dimensioned such that the stiffness ratio of radial to axial stiffness lies in the range of 0.6 to 2.4. With increasing second longitudinal contact length, the radial stiffness increases, while the axial stiffness remains unaffected. It is conceivable that the circumferential projection forms a groove wall of the groove and / or abuts the contact surface of the circumferential flange. This allows for the formation of a compact elastomer body. The circumferential projection can be integrally bonded, preferably integrally formed and made of the same material as the elastomer body. It can project radially from a leg of the elastomer body.Certainly, the same effects can be achieved in the respective border regions beyond the aforementioned borders, but possibly in a weaker form.

[0019] According to a possible further development of the assembly according to the invention, the circumferential projection can have a square, rectangular, or trapezoidal longitudinal cross-sectional area in the unloaded state. These geometries can influence the second longitudinal contact length, advantageously allowing the stiffness ratio of the assembly to be adjusted in the axial and radial directions.

[0020] According to a possible further development of the assembly according to the invention, the elastomer body can be in continuous contact with the inner circumferential surface in the region of the second longitudinal contact length. This allows the stiffness ratio to be made independent of the force applied from any radial direction.

[0021] According to a possible further development of the assembly according to the invention, the ratio between the second longitudinal contact length and the first longitudinal contact length can be greater than 0.75. This ratio advantageously allows the stiffness of the assembly to be adjusted in the axial and radial directions. As the ratio increases, the radial stiffness increases relative to the axial stiffness. Certainly, a similar effect can be achieved in the borderline region beyond the aforementioned limit, although possibly in a weaker form.

[0022] According to a further development of the assembly according to the invention, the ratio of the diameter of the elastomer body at the section designed to abut the circumferential flange, in the unloaded state of the elastomer body, to the diameter of the circumferential flange or to the largest diameter of the circumferential flange can be greater than 1.03. The relevant section of the elastomer body in contact with the circumferential flange can be the groove base. This minimum overlap of 3% ensures a secure and durable fit of the damping device. The diameter of the unloaded groove base can be 3% larger than the diameter of the circumferential flange. Certainly, a similar effect can be achieved in the border region beyond this limit, although possibly in a less pronounced form.

[0023] According to a further development of the assembly according to the invention, the ratio of the diameter of the elastomer body in the section designed to contact the inner circumferential surface, particularly in the region of the second longitudinal contact length, to the diameter of the opening (which may be a second diameter) or to the largest diameter of the opening, in the unloaded state of the elastomer body, can be greater than 1.03. This minimum overlap of 3% also ensures a secure and durable fit of the damping device and influences the stiffness ratio of the assembly in the axial and radial directions. The radial stiffness increases with an increasing value of the ratio. The diameter of the unloaded circumferential projection can be 3% larger than the diameter of the cylindrical contact section. Certainly, a similar effect can be achieved in the boundary region beyond this limit, although possibly in a less pronounced form.

[0024] According to a further development of the assembly according to the invention, the difference between the second diameter and the first diameter can be greater than 5 mm. This allows for the creation of a radial step with a radial length of at least 2.5 mm. This dimension serves, among other things, to ensure a secure and durable fit of the damping device. Certainly, a similar effect can be achieved in the border region beyond the aforementioned limit, although possibly in a less pronounced form.

[0025] According to a further development of the assembly according to the invention, the groove and / or the circumferential projection can have a circular, oval, elliptical, or oblong outer circumferential contour in cross-section, and / or the circumferential flange and / or the inner circumferential surface and / or a contact section of the opening can have a circular inner circumferential contour in cross-section. The inner circumferential surface of the opening can preferably be designed in this way, at least in the region of the second longitudinal contact length. The flange-groove connection can be non-circular, which can result in different clearances and different preloads and / or stiffnesses in different radial directions. The same applies to the contact area on the inner circumferential surface or the region of the second longitudinal contact length. Furthermore, this allows the inner sleeve to be arranged, for example, to be displaceable in the opening in a transverse direction (perpendicular to the central longitudinal axis).This leads to easier assembly of other components, as the damping device can be easily moved along the respective contour, for example along the elongated outer circumferential contour.

[0026] It is conceivable that this design is implemented solely on the component side (at least on the circumferential flange and / or the inner circumferential surface of the opening) and that the elastomer body is circular in cross-section, at least in the contact areas with the first component. This allows, firstly, influence on the axial to radial stiffness ratio. Secondly, different characteristic curves, especially with regard to linear spring stiffnesses, can be achieved by using a contour of the circumferential flange and / or the inner circumferential surface of the opening that deviates from a circular shape. Thirdly, these advantages can be realized without having to adapt the elastomer body accordingly – it can therefore be or remain circular in cross-section, at least in the contact areas with the first component. The need for new vulcanization tools is thus avoided.

[0027] According to the invention, the damping device has at least one radially outwardly projecting axial stop, preferably two radially outwardly projecting axial stops, which are preferably arranged at one end or preferably on opposite end faces of the damping device. The axial stop(s) can preferably be circular in cross-section to be directionally independent. The at least one axial stop can be integrally bonded, preferably integrally and of the same material as the elastomer body. Alternatively, it is conceivable that only one of the two axial stops is integrally bonded, preferably integrally and of the same material as the elastomer body, and the second axial stop is connected to the inner sleeve adjacent to the elastomer body. The at least one axial stop can project radially from a leg or a fold of the elastomer body.The at least one axial stop can perform many functions. It can serve as an axial travel limit for the first component and / or another component, and buffer axial impacts. It is conceivable that the at least one axial stop covers at least a section of an axial surface of the first component. Furthermore, the at least one axial stop can ensure a secure fit of the damping device and also prevent it from disengaging from the opening. Since the invention does not require an outer sleeve that is typically pressed into the opening, a positive fit between the elastomer body and the opening can result in a secure fit even without an outer sleeve. If both axial stops are provided, a damping device with axial stops in both spatial directions along the central longitudinal axis can be created.

[0028] According to a possible further development of the assembly according to the invention, at least one axial stop or one of the two axial stops can form a groove wall of the groove. This allows a compact elastomer body to be formed.

[0029] According to a possible further development of the assembly according to the invention, the security against unhooking can also be further improved by ensuring that the material thickness of the elastomer body in the area surrounding the circumferential flange corresponds, at least in sections, to at least the first longitudinal contact length. The material thickness can be defined transversely to the centerline of the elastomer body. This material thickness can be present at least in the area of ​​an axial stop bearing against the circumferential flange and in an area on the inner circumference of the circumferential flange. The area surrounding the circumferential flange can form the groove. This provides sufficient material thickness in this area to counteract an unhooking force.

[0030] According to the invention, one or at least one of the axial stops has radially extending mounting slots, which are preferably arranged equidistant from each other with respect to the central longitudinal axis. Preferably, only the axial stop that is guided through the opening during assembly of the damping device has mounting slots. This allows this axial stop to fold easily during assembly to avoid excessive strain and damage, thus reducing the required assembly force. This axial stop, which can be umbrella-shaped, can therefore snap open into its final position or snap out of the opening after being guided through the opening or inserted sufficiently far into the opening.The mounting slots can extend approximately half the radial extent of the respective axial stop, resulting in a suitable design for easy mounting and a secure axial stop function.

[0031] According to a possible further development of the assembly according to the invention, one or at least one of the axial stops and / or the circumferential projection can be designed, preferably geometrically, such that the corresponding axial stop rests axially below or adjacent to the circumferential projection in the opening during assembly of the damping device. Preferably, this applies to the axial stop that is guided through the opening during assembly of the damping device. The elastomer body can form a mounting corner into which the axial stop can be inserted during assembly. The mounting corner can be a step and / or its radial depth can be at least equal to the material thickness of the inserted axial stop. This prevents, firstly, radial overlapping of the axial stop and circumferential projection during assembly, thus avoiding high assembly forces.Secondly, the circumferential projection successfully prevents the corresponding axial stop from threading into the circumferential flange during assembly, thus making it impossible to mount.

[0032] According to the invention, one axial stop is arranged on a fold of the elastomer body or longitudinally adjacent to its fold. The at least one axial stop can be bonded to the elastomer body, preferably integrally and of the same material. Alternatively, the axial stop can be bonded to the inner sleeve adjacent to the elastomer body, preferably by vulcanization. A bonding elastomer skin may be present between this axial stop and the elastomer body, which may be a result of the manufacturing process and can simplify the vulcanization tool. However, this does not result in a forced coupling between this adjacent axial stop and the elastomer body, i.e., deformation of one axial stop and one elastomer body does not necessarily lead to deformation of the other.The adjacent arrangement of the axial stop allows it to be used as a damping device for high-frequency vibrations. The axial stop can oscillate freely from the elastomer body without affecting it. This adjacent axial stop does not serve a holding function. Furthermore, the adjacent arrangement of the axial stop prevents any relative movement between it and the elastomer body, thus avoiding frictional wear and the formation of flexible geometries with dynamic hardening in the elastomer body. The adjacent axial stop can be designed and / or positioned so that, in the assembled state, it does not rest against the first component, but rather against a second component. This arrangement improves the damping function.

[0033] According to a possible further development of the assembly according to the invention, at least one of the axial stops can be arranged on the elastomer body such that the centerline of the axial stop forms an angle with the centerline of the elastomer body at an angle of 0° to 45° with the central longitudinal axis. This improves the snapping apart or snapping out of the opening of the axial stop after it has been inserted through the opening or sufficiently far into the opening into its final position, such that the axial stop experiences a preload upon insertion, with this preload increasing as the angle decreases. This effect can be enhanced by arranging the axial stop at the fold, as this creates a whip-like preload that causes the axial stop to snap apart or out of the opening.

[0034] According to a possible further development of the assembly according to the invention, one or at least one of the axial stops can be contoured. The contoured axial stop can have a contour on its side facing away from a transverse center plane of the damping device. The contour can, for example, be a circular wave contour, a radial wave contour, a checkerboard-like grid, or be designed by means of point-like domes. Alternatively or additionally, the contoured axial stop can have a contour on its circumferential surface. For example, the mounting slots are a contour in this sense. In any case, such contouring serves to provide a smooth transition between basic stiffness and progression.

[0035] According to a possible further development of the assembly according to the invention, a radially inner connection point of one axial stop, or at least one of the axial stops, to the inner sleeve, the elastomer body, or to a leg of the elastomer body, viewed in the longitudinal direction, can be located within the circumferential flange. This simplifies the insertion of the respective axial stop through the opening during assembly.

[0036] According to a further development of the assembly according to the invention, a further component can be provided which is connectable to the damping device and has a stop surface which is preferably arranged axially adjacent to one or more axial stops, wherein a (first and / or second) longitudinal distance between this axial stop and the stop surface is less than or equal to an overlap distance between this axial stop and the first component. Further components can, for example, be a stop plate and a compressor to be damped. Further components can be used, for example, to prevent disengagement. This embodiment serves to ensure that, after a longitudinal adjustment in the direction of the damping device, one of these further components abuts the corresponding axial stop before the damping device can disengage.The striking action is therefore used as an additional holding force.

[0037] According to a possible further development of the assembly according to the invention, the elastomer body can have a rolled diaphragm contour on at least one side and / or form a fold and / or be U-shaped in longitudinal section. The elastomer body can therefore, in longitudinal section, have a first leg which may be connected to the inner sleeve, a second leg which may surround the first leg circumferentially, and a fold connecting the two legs. The inner sleeve can be vulcanized into the first leg. The fold also enables a spring-like action, particularly in the longitudinal direction. Furthermore, this design allows for very soft bearing characteristics.

[0038] According to a possible further development of the assembly according to the invention, the elastomer body, viewed longitudinally, can have a center line which, in the region of the fold, is radially covered by the circumferential flange or at least tangent to the projection of the circumferential flange in the direction of the central longitudinal axis. The center line can also extend only through the legs. This relationship between the circumferential flange and the fold serves to prevent unbundling by having the circumferential flange hold and reinforce the fold in the direction of the central longitudinal axis.

[0039] According to a possible further development of the assembly according to the invention, a (third) longitudinal gap between the fold and the circumferential flange can be at least 2 mm. This longitudinal gap can be located between, on the one hand, the contact surface of the circumferential flange and / or, on the other hand, the surface of the fold facing the circumferential flange. A smaller gap would restrict the damping functionality.

[0040] Further features, details and advantages of the invention will become apparent from the wording of the claims and from the following description of exemplary embodiments with reference to the drawings. The drawings show: Fig. 1 a schematic perspective view of a damping device of the first embodiment according to the invention; Fig. 2 a longitudinal sectional view of the damping device according to Fig. 1; Fig. 3 a longitudinal sectional view of a damping device of second embodiment, and Fig. 4 a longitudinal sectional view of an assembly according to the invention with the damping device according to Fig. 1.

[0041] In the figures, identical or corresponding elements are designated with the same reference numerals and are therefore not described again unless expedient. Features already described are not described again to avoid repetition and are applicable to all elements with the same or corresponding reference numerals, unless explicitly excluded. The disclosures contained in the entire description are transferable analogously to identical parts with the same reference numerals or component designations. Furthermore, the positional designations chosen in the description, such as top, bottom, side, etc., refer to the directly described and illustrated figure and must be applied analogously to any new position.Furthermore, individual features or combinations of features from the different exemplary embodiments shown and described can also represent independent, inventive or inventive solutions.

[0042] A radial direction R extends from a central longitudinal axis A. A circumferential direction U extends around the central longitudinal axis A, and a transverse median plane Q is arranged such that its normal vector lies on the central longitudinal axis A. A longitudinal direction L extends parallel to the central longitudinal axis A.

[0043] Fig. Figure 1 shows a damping device 2 in the unloaded state, which comprises an inner sleeve 4 provided with a through-hole or bore 6 in the longitudinal direction L or in the direction of the central longitudinal axis A. The damping device 2 can be designed to be rotationally symmetrical with respect to the central longitudinal axis A. A [missing information] can be inserted through the bore 6. Fig. The fastening element 400 shown, for example a screw, is passed through to connect the damping device 2 to a component 200, 300. An elastomer body 8 is vulcanized to the inner sleeve 4, which serves to fasten the damping device 2 to a first component 100. It can be seen that the damping device 2 is designed without an outer sleeve.

[0044] As seen in conjunction with Fig. As can be seen in Figure 2, the damping device 2 has a radially outward projecting axial stop 18, which can be an axial stop located opposite to an insertion direction E, and a radially outward projecting axial stop 20, which can be an axial stop located in the insertion direction E. The axial stops 18, 20 are arranged on opposite end faces of the damping device 2 or the elastomer body 8 and have a circular cross-section. The axial stops 18, 20 are formed integrally with the elastomer body 8 and are made of the same material and are connected to the second leg 30 at a connection point 24. Fig. Figure 1 shows that the axial stop 20 has mounting slots 22 extending in the radial direction R, which are arranged equidistant to each other with respect to the central longitudinal axis A.

[0045] Fig. Figure 2 shows that the elastomer body 8 has a rolled diaphragm contour K. The elastomer body 8 comprises a first leg 28, in which the inner sleeve 4 is vulcanized in a material-bonded manner, and a second leg 30, which surrounds the first leg 28 circumferentially. A fold 26, which describes a 180° bend, connects the two legs 28 and 30. It can also be seen that the elastomer body 8 has a center line 32, which extends centrally through the legs 28 and 30 and the fold 26 of the elastomer body 8. The first leg 28 serves, individually or together with the second leg 30, as a radial buffer or radial stop.

[0046] The axial stop 18 projects outwards at a right angle from the second leg 30 in the radial direction R. The axial stop 20 has a center line 34. The center line 34 of the axial stop 20 abuts the center line 32 of the elastomer body 8 in the region of the fold 26. At this point, the center line 34 of the axial stop 20 forms an angle W with the central longitudinal axis A in the range of 0° to 45°. The axial stop 20 extends in its distal region in the radial direction R, possibly parallel to the axial stop 18.

[0047] In the longitudinal direction L between the two axial stops 18, 20, the elastomer body 8 has a circumferential projection 16 on its outer circumference, projecting outwards in the radial direction R. It is evident that the circumferential projection 16 in its Fig. 2 and Fig. Figure 3 shows that the unloaded state has, or approximately has, a square or trapezoidal longitudinal cross-sectional surface. The corners of the longitudinal cross-sectional surface may be rounded due to the manufacturing process. The circumferential projection 16 extends in its distal region in the radial direction R, possibly parallel to the axial stop 18, starting from the second leg 30. The circumferential projection 16 is formed in one piece and of the same material as the elastomer body 8.

[0048] For fixing to the first component 100, the elastomer body 8 has an external circumferential groove 10. The groove 10 is an external circumferential groove and has a rectangular cross-section. Furthermore, the groove 10 has a groove base 12 and two adjacent groove walls 14, which are formed on one side by the axial stop 18 and on the other side by the circumferential projection 16. A three-sided groove is therefore formed.

[0049] The inner sleeve 2 has a greater longitudinal extent than the elastomer body 8. On its outer circumference, the inner sleeve 2 is completely covered with elastomer, although this is due to the manufacturing process in certain sections. For example, in one end region, the inner sleeve 2 is only provided with an elastomer skin 36, which has no function for the elastomer body 8 as such.

[0050] To avoid repetition, the following should be noted regarding Fig. 3 only the differences to Fig. 2 will be described. While in the case of the damping device according to Fig. Since the first axial stop 20 is formed integrally and of the same material as the elastomer body 8 itself, the second axial stop 20 is connected to the inner sleeve 2 adjacent to the elastomer body 8. Between this adjacent axial stop 20 and the elastomer body 8, an elastomer skin 36 is present on the inner sleeve 2. This skin is a manufacturing feature and serves no function for the elastomer body 8 or the adjacent axial stop 20. In this configuration, the adjacent axial stop 20 can be used as a damping device for high-frequency vibrations. The adjacent axial stop 20 projects outwards at a right angle from the inner sleeve 2 in the radial direction R.

[0051] Fig. Figure 4 now shows an assembly 1 with the damping device 2 according to Fig. 1 and Fig. 2, where the damping device 2 is also included in principle according to Fig. 3 can be used.

[0052] Assembly 1 comprises, in addition to the damping device 2, the first component 100, which can be a frame. The first component 100 has an opening 102, which is designed as a through-opening, so that the damping device 2 can be connected to a component 200, 300 from either side of the through-opening. The opening 102 has an inner circumferential surface 104, and the central longitudinal axis A extends centrally through it. The damping device 2 is arranged in this opening 102, being inserted or pressed into the opening 102 in the direction of an insertion direction E. Thus, in the assembled state, an interference fit is formed between the damping device 2 and the opening 102.

[0053] During assembly, the axial stop 20 is inserted into the opening 102 in the insertion direction E and guided through it. After passing through the opening 102 or after being inserted sufficiently far into the opening 102, the axial stop 20 snaps apart into its end position as shown and rests against the first component 100.

[0054] The axial stop 20 and / or the circumferential projection 16 is / are designed such that, during the assembly of the damping device 2 in the opening 102, the axial stop 20 rests axially below or adjacent to the circumferential projection 16 against the elastomer body 8. The length and / or the connection point 24 of the axial stop 20 can, for example, be dimensioned and / or arranged such that, during assembly, the axial stop 20 rests in a mounting corner 38, which may be formed by the circumferential projection 16. The axial stop 20 also receives a preload force from the fold 26, which contributes to its snap-in action. The radially inner connection point 24 of the axial stop 20 lies, viewed in the longitudinal direction L, within the circumferential flange 106 or a first diameter D1.

[0055] The opening 102 has two adjacent sections in the longitudinal direction L. One section has the circumferential flange 106, and the other is a cylindrical contact section 108, which is arranged directly adjacent to the circumferential flange 106. The circumferential flange 106 projects radially inwards in the direction R and engages positively in the groove 10. The circumferential flange 106 is encompassed on three sides. The circumferential flange 106 has at least one contact surface 110 for the groove 10, where the groove wall 14 abuts.

[0056] The groove 10 and the circumferential projection 16 each have a circular outer circumferential contour in cross-section, while the circumferential flange 106 and the mounting section 108 of the opening 102 each have a circular inner circumferential contour in cross-section.

[0057] It is evident that, in the assembled state, the center line 32 runs in such a way that it is radially covered by the circumferential flange 106 in the area of ​​the fold 26, or at least tangent to its projection in the direction of the central longitudinal axis A. For illustrative purposes only, the center line 32 is not shown in the area of ​​the first leg 28, although it is present.

[0058] Further components 200, 300 are connected to the damping device 2, namely a second component 200, which can be a compressor or a compressor support, and a third component 300, which can be a stop plate. Components 200, 300 each have a stop surface 202, 302, which is arranged axially adjacent to the corresponding axial stop 18, 20. The fastening element 400 extends through the third component 300, the inner sleeve 4, and then engages securely in a thread 204 in the second component 200.

[0059] A first longitudinal contact length L1, extending in the longitudinal direction L, is formed along the groove base 12 of the groove 10 and the circumferential flange 106 or its radial inner surface 112, wherein the first longitudinal contact length L1 defines the distance over which the groove base 12 and the circumferential flange 106 are in contact with each other. The first longitudinal contact length L1 can be in the range of 2 mm to 15 mm. A material thickness of the elastomer body 8 in the area surrounding the circumferential flange 106 corresponds, at least in sections, to at least the first longitudinal contact length L1, whereby in the present example this applies to the axial stop 18 bearing against the circumferential flange 106 and to a region of the elastomer body 8 on the inner circumferential side of the circumferential flange 106.

[0060] A second longitudinal contact length L2, extending in the longitudinal direction L, is formed between the elastomer body 8 or its circumferential projection 16 and the inner circumferential surface 104 or the contact section 108. The second longitudinal contact length L2 defines the distance over which the elastomer body 8 and the component 100 are in contact with each other in the area outside the circumferential flange 106 or in the area of ​​the contact section 108. The second longitudinal contact length L2 can be at least 1.5 mm. In the area of ​​the second longitudinal contact length L2, the elastomer body 8 is in continuous contact with the inner circumferential surface 104 in the circumferential direction U. The ratio between the second longitudinal contact length L2 and the first longitudinal contact length L1 can be greater than 0.75 (L2 / L1 > 0.75).

[0061] A (first) longitudinal distance L3, extending in the longitudinal direction L, can be given between the axial stop 20 and the stop surface 202. The (first) longitudinal distance L3 specifies the distance over which the axial stop 20 and the stop surface 202 can move relative to each other until they abut each other and the axial stop 20 buffers the impact of the second component 200.

[0062] A (second) longitudinal distance L4, extending in the longitudinal direction L, can be given between the axial stop 18 and the stop surface 302. The (second) longitudinal distance L4 specifies the distance over which the axial stop 18 and the stop surface 302 can move relative to each other until they abut each other and the axial stop 18 buffers the impact of the third component 300.

[0063] A (third) longitudinal distance L5, extending in the longitudinal direction L, can be provided between the fold 26 and the circumferential flange 106, and this distance can be at least 2 mm. The (third) longitudinal distance L5 specifies the distance between the fold 26 or its surface facing the circumferential flange on the one hand, and the circumferential flange 106 or its contact surface facing the fold on the other.

[0064] The length of the opening 102 in the longitudinal direction is designated L6. The ratio of the length L6 of the opening 102 in the direction of the central longitudinal axis A to the second longitudinal contact length L2 can be in the range of 2 to 5.

[0065] A first diameter D1 is encompassed by the circumferential flange 106 and specifies the clear width of the opening 102 in the area of ​​the circumferential flange 106. The ratio of the diameter of the elastomer body 8 in the groove base 12 in the unloaded state of the elastomer body 8 to the diameter D1 of the circumferential flange 106 can be greater than 1.03.

[0066] A second diameter D2 is encompassed by the contact section 108 and defines the clear width of the opening 102 in the region of the contact section 108, which in the example shown is also the largest diameter of the opening 102. The ratio of the diameter of the elastomer body 8 in the section designed to contact the inner circumferential surface 104, particularly in the region of the second longitudinal contact length L2, to the diameter of the opening 102 in the region of the second longitudinal contact length L2, in the unloaded state of the elastomer body 8, can be greater than 1.03. The difference between the second diameter D2 and the first diameter D1 can be greater than 5 mm.

[0067] The axial stop 20 rests against the end face of the first component 100. The distance of this overlap is designated as the (first) overlap distance D3. The (first) longitudinal distance L3 can be smaller than this (first) overlap distance D3.

[0068] The axial stop 18 also rests against the end face of the first component 100. The distance of this overlap is designated as the (second) overlap distance D4. The (second) longitudinal distance L4 can be smaller than this (second) overlap distance D4.

[0069] The invention is not limited to one of the embodiments described above, but can be modified in a variety of ways. All features and advantages arising from the claims, the description, and the drawings, including design details, spatial arrangements, and process steps, can be essential to the invention both individually and in various combinations.

[0070] The invention encompasses all combinations of at least two of the features disclosed in the description, the claims and / or the figures.

[0071] To avoid repetition, features disclosed by the device itself shall also be deemed disclosed by the process and be claimable. Likewise, features disclosed by the process shall be deemed disclosed by the device itself and be claimable.

Claims

[1] Assembly comprising a first component (100) with an opening (102) with an inner circumferential surface (104) and a damping device (2) through which a central longitudinal axis (A) penetrates, comprising an inner sleeve (4) with a bore (6) designed for fastening the damping device (2) to a further component (200, 300), and an elastomeric body (8) for attaching the damping device (2) to the first component (100), which surrounds the inner sleeve (4) on its outer circumference, wherein the damping device (2) is designed without an outer sleeve, wherein the damping device (2) has at least one radially outward projecting axial stop (18, 20), wherein one axial stop (18, 20) is arranged on a fold (26) of the elastomer body (8) or in the longitudinal direction (L) adjacent to its fold (26), characterized by, that the elastomer body (8) is pre-tensioned against the inner circumferential surface (104) and has an axial stop (18, 20) or at least one of the axial stops (18, 20) mounting slots (22) extending in the radial direction (R). [2] Assembly according to claim 1, characterized by , that the opening (102) has a radially inward projecting circumferential flange (106) and the elastomer body (8) has a circumferential groove (10), wherein the circumferential flange (106) engages positively in the groove (10), preferably forming a first longitudinal contact length (L1) along the groove base (12) and the circumferential flange (106). [3] Assembly according to one of the preceding claims, characterized by, that the ratio of the diameter of the elastomer body (8) at the section designed to fit the circumferential flange (106) in the unloaded state of the elastomer body (8) to the diameter (D1) of the circumferential flange (106) or to the largest diameter of the circumferential flange (106) is greater than 1.

03. [4] Assembly according to one of the preceding claims, characterized by , that the ratio of the diameter of the elastomer body (8) in the section designed to be in contact with the inner circumferential surface (104), in particular in the area of ​​the second longitudinal contact length (L2), in the unloaded state of the elastomer body (8) to the diameter (D2) of the opening (102) or to the largest diameter of the opening (102) is greater than 1.

03. [5] Assembly according to claims 3 and 4, characterized by , that the difference between the second diameter (D2) and the first diameter (D1) is greater than 5 mm. [6] Assembly according to one of the preceding claims, characterized by, that the groove (10) and / or a circumferential projection (16) has / have a cross-sectionally circular, oval, elliptical or oblong outer circumferential contour and / or the circumferential flange (106) and / or the inner circumferential surface (104) and / or a contact section (108) has / have a cross-sectionally circular inner circumferential contour. [7] Assembly according to one of the preceding claims, characterized by , that the damping device (2) has two radially outward projecting axial stops (18, 20) which are preferably arranged on opposite end sides of the damping device (2). [8] Assembly according to one of the preceding claims, characterized by , that the mounting slots (22) are arranged equidistant to each other with respect to the central longitudinal axis (A). [9] Assembly according to one of the preceding claims, characterized bythe further component (200, 300) which can be connected to the damping device (2) and has a stop surface (202, 302) which is preferably arranged axially adjacent to the one axial stop (18, 20) or to one of the axial stops (18, 20), wherein a longitudinal distance (L3, L4) between this axial stop (18, 20) and the stop surface (202, 302) is less than or equal to an overlap distance (D3, D4) between this axial stop (18, 20) and the first component (100).

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