Assembly with elastomeric body

Abstract

The present invention is an assembly comprising a first part (100) with an opening (102) having an inner circumferential surface (104), a damping device (2) through which a central longitudinal axis (A) passes, an inner sleeve (4) having a hole (6) and designed for fixing the damping device (2) to another part (200, 300), and an elastomeric body (8) for fastening the damping device (2) to the first part, the elastomeric body (8) surrounding the outer periphery of the inner sleeve (4) and supporting it in a manner that applies a preload against the inner circumferential surface (104), the damping device (2) being designed without an outer sleeve.

Description

[Technical field]

[0001] The invention relates to an assembly comprising an elastomeric body as claimed in claim 1. [Background technology]

[0002] It is known in the art to resiliently mount one component to another by means of a spring member, the spring member being secured in an opening in one component and the other component being connected to the spring member in order to damp vibrations.

[0003] Assemblies of the above-mentioned kind are used in automotive construction to reduce the vibrations transmitted from one component, e.g. the engine or the compressor, to other components, e.g. vehicle components, while the vehicle is moving or even while stationary, thereby improving driving comfort.

[0004] However, the disadvantage is that the vulcanization tool must be constructed to be able to release the complex shape of the spring element and / or to accommodate many insert parts in the vulcanization tool, which are of complex and multi-part design. Such insert parts, for example the outer sleeve of an elastomeric bushing, are problematic in terms of the tolerances for the subsequent press-in of the parts and for safe operation. On the other hand, a spring element without a sleeve does not provide sufficient security against withdrawal through the opening. Summary of the Invention

[0005] It is therefore an object of the present invention to provide an assembly which allows for improved and at the same time cost-effective manufacture and assembly, while at the same time improving and ensuring attachment of the damping device during operation. The main features of the invention are specified in claim 1. Improvements are the subject matter of claims 2 to 10.

[0006] Thus, according to the invention, a damping device is provided which comprises a first part having an opening with an inner circumferential surface and a damping device through which a central longitudinal axis passes, the damping device comprising an inner sleeve having a hole designed for fixing the damping device to another part and an elastomeric body for fixing the damping device to the first part, the elastomeric body surrounding the outer periphery of the inner sleeve and supported under preload against the inner circumferential surface, the damping device being designed without an outer sleeve, the outer circumferential surface being more preferably completely formed by the elastomeric body, preferably in the contact area with the first part.

[0007] According to the invention, the damping device can already be manufactured more cost-effectively due to the fact that the outer sleeve is no longer necessary and the elastomeric body comes into direct contact with the inner circumferential surface (without an intermediate outer sleeve). As a result, the vulcanization tool is less complicated, since only the inner sleeve is inserted there. Overall, the invention reduces the complexity of the vulcanization tool in the manufacturing process. In addition, by not using an outer sleeve, it is not necessary to maintain tight tolerances for the connection to the first part, for example by press-fitting. Since the elastomeric body comes into contact with the first part, its deformability serves to compensate for the tolerances. Furthermore, it is no longer necessary to ensure a reliable press-fit of the outer sleeve and therefore no need to monitor the corresponding assembly process. The omission of the outer sleeve results in an at least partially elastic circumferential area of ​​the elastomeric body, as a result of which the stiffness ratio in the axial and / or radial direction can be easily adjusted. The damping device can be designed to be rotationally symmetrical about a central longitudinal axis.

[0008] The opening can be a through hole, whereby the damping device can advantageously be connected to the part from both sides of the through hole. Alternatively, the opening can be a blind hole, in which case a continuous or deep opening can be omitted if the first part does not allow it. The opening can also be a hole.

[0009] The damping device can be inserted or pressed into the opening along the insertion direction, whereby a tight fit is formed in the second case. The damping device or its elastomeric body can have a dimensional overlap, preferably in the radial direction, with respect to the opening, which brings about a prestress and ensures a tight fit of the damping device in the opening and at the same time provides a tolerance compensation for the first part. For this purpose, for example, the elastomeric body can have a diameter that is larger than the diameter of the opening, at least partially in the respective contact area in the assembled state between the first part and the damping device. Precisely this press-fit allows a structural configuration of the opening and / or the elastomeric body, which can affect both the overall stiffness in the axial and / or radial direction and a specific adjustment between the damping behavior in the axial and radial directions. In this case, the adjustment of the stiffness ratio can be influenced by various approaches, which are the subject of advantageous embodiments.

[0010] Thus, the damping device may be used to damp vibrations in components such as compressors.

[0011] The assembled state is to be understood as the state in which the damping device is finally held in the opening after fitting. The unloaded state is to be understood as the state before assembly. The diameter is to be understood in the mathematical sense as the chord or chord length passing through the centre point of the corresponding body. The relationship between the damping device and the first part is as a rule described in the assembled state, unless expressly stated otherwise, e.g. in the preassembled state or in the unloaded state. The outer sleeve is a cylindrical sleeve, e.g. made of plastic or metal, which usually surrounds the elastomeric body on the outer periphery. The insertion direction is the direction along the central longitudinal axis in which the damping device is inserted into the opening during assembly. The outer sleeve free means that there is no outer sleeve covering the outer periphery of the elastomeric body.

[0012] According to another development of the assembly according to the invention, the opening has a circumferential flange projecting radially inwards and the elastomeric body has a circumferential groove, whereby the circumferential flange can fit securely into the groove. Preferably, the first longitudinal contact length can be formed along the groove bottom of the groove and along the circumferential flange. The first longitudinal contact length indicates the distance in the direction of the central longitudinal axis, in which the first part and the elastomeric body contact each other in this area. The circumferential flange can be an inner circumferential flange and the groove can be an outer circumferential groove. This flange-groove connection ensures a secure attachment of the damping device. The groove can be designed with a groove bottom and two groove walls adjacent to the groove bottom, such that the flange can engage on three sides. A secure attachment is thus ensured in two opposite spatial directions along the central longitudinal axis.

[0013] According to another possible development of the assembly according to the invention, the opening can be adjacent, preferably directly adjacent, to the circumferential flange and constitute a cylindrical attachment, i.e. a part of constant diameter, against which the elastomeric body can support itself. Furthermore, the opening can be constructed as simply as possible and still allow the damping device to be fixed in a reliable manner.

[0014] According to another possible development of the assembly according to the invention, the circumferential flange can have at least one mounting surface for the elastomeric body, preferably for its groove, which mounting surface can have a conical shape. Viewed in longitudinal section, the mounting surface can be inclined towards the central longitudinal axis and towards the insertion direction, whereby the mounting surface can subtend an angle with the central longitudinal axis, preferably ranging from 60° to 90°. This makes it possible to safely prevent the damping device from being dislodged in the direction opposite to the insertion direction. Preferably, the assembly has only a single insertion direction. In this way, the shape of the opening and / or the elastomeric body can be optimized in terms of operational functionality, without possible negative effects of insertion from multiple directions.

[0015] According to another possible 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 central longitudinal direction over a distance of 2 mm to 15 mm. This range represents an optimum range between a sufficient radial stop function (lower limit) in which the elastomeric body buffers the radial abutment of the inner sleeve with the flange in the region of the groove base, and a sufficient economy (upper limit) since a first longitudinal contact length exceeding 15 mm can only be produced at considerable cost. Of course, in the respective boundary region, the same effect can be obtained beyond the aforementioned limits, but possibly in a weakened form.

[0016] According to another possible development of the assembly according to the invention, the elastomeric body can have a circumferential projection projecting radially outward, which supports the inner peripheral surface over a second longitudinal contact length of at least 1.5 mm. In this way, the circumferential projection contacts the inner peripheral surface in the central longitudinal direction over a distance of at least 1.5 mm. It is conceivable that the second longitudinal contact length is in the region of the cylindrical attachment, where an additional fixation is provided in addition to the flange-groove connection. It is also conceivable that the ratio of the length of the central longitudinal opening to the second longitudinal contact length is in the range of 2 to 5, preferably 2.5 to 3.5. These dimensions serve in particular to ensure a secure and durable attachment of the damping device. This second longitudinal contact length can be used to advantageously adjust the stiffness ratio of the assembly in the axial and radial directions. It is conceivable to dimension the second longitudinal contact length such that the stiffness ratio between the radial stiffness and the axial stiffness is in the range of 0.6 to 2.4. The radial stiffness increases as the second longitudinal contact length increases, while the axial stiffness remains unaffected. It is conceivable that the circumferential projection forms the groove wall of the groove and / or contacts against the mounting surface of the circumferential flange. This allows a compact elastomeric body to be formed. The circumferential projection can be formed integrally with the elastomeric body, preferably integrally and of the same material. The circumferential projection can protrude radially from the foot of the elastomeric body. Of course, a similar effect can be obtained in the respective boundary region beyond the above-mentioned limits, but possibly in a weakened form.

[0017] According to other possible developments of the assembly according to the invention, the circumferential projection can have, in the unloaded state, a square, rectangular or trapezoidal longitudinal section, which can influence the second longitudinal contact length and advantageously adjust the stiffness ratio of the assembly in the axial and radial directions.

[0018] According to another possible development of the assembly according to the invention, in the region of the second longitudinal contact length, the elastomeric body can be in uninterrupted contact with the inner circumferential surface in the circumferential direction, so that the stiffness ratio can be independent of the application of any radial force.

[0019] According to another possible 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 allows advantageously adjusting the stiffness ratio of the assembly in the axial and radial directions. The higher the ratio, the greater the radial stiffness relative to the axial stiffness. Of course, in the boundary region beyond this limit, a similar effect is obtained, but possibly in a weakened form.

[0020] According to another development of the assembly according to the invention, the ratio of the diameter of the elastomeric body in the part designed to come into contact with the circumferential flange to the diameter of the circumferential flange or to the maximum diameter of the circumferential flange can be greater than 1.03 in the unloaded state of the elastomeric body. The part of the elastomeric body bearing on the circumferential flange concerned here can be the bottom of the groove. This dimension of at least 3% overlap serves to ensure a secure and durable attachment of the damping device. The diameter of the unloaded bottom of the groove can be 3% greater than the diameter of the circumferential flange. Of course, the same effect is obtained in the border areas beyond the abovementioned limits, but possibly in a weakened form.

[0021] According to another development of the assembly according to the invention, the ratio of the diameter of the elastomeric body in the part designed to contact the inner circumferential surface, in particular in the region of the second longitudinal contact length, to the diameter of the opening, which may be the second diameter, or to the maximum diameter of the opening, in the unloaded state of the elastomeric body, can be greater than 1.03. This dimension of at least 3% overlap also serves to ensure a secure and durable attachment of the damping device and influences the stiffness ratio of the assembly in the axial and radial directions. The greater this ratio, the greater the radial stiffness. The diameter of the unloaded circumferential projection can be 3% greater than the diameter of the cylindrical attachment. Of course, the same effect can be obtained in the border regions beyond the abovementioned limits, but possibly in a weakened form.

[0022] According to another 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 to realize a radial shoulder with a radial length of at least 2.5 mm. This dimension serves in particular to ensure a secure and durable attachment of the damping device. Of course, the same effect is also obtained in the border area beyond the aforementioned limits, but possibly in a weakened form.

[0023] According to another development of the assembly according to the invention, the groove and / or the circumferential projection can have a circular, elliptical, oval or slot-like outer peripheral contour in cross section and / or the circumferential flange and / or the inner peripheral surface and / or the mounting part of the opening can have a circular inner peripheral contour in cross section. The inner peripheral surface of the opening can preferably be designed in this way at least in the region of the second longitudinal contact length. The connection between the flange and the groove can be non-circular, which can result in different clearances, different preloads and / or stiffnesses in different radial directions, as well as the contact area of ​​the inner peripheral surface or the region of the second longitudinal contact length. Furthermore, this allows the inner sleeve to be arranged in the opening, for example laterally (perpendicular to the central longitudinal axis) displaceable. This allows the damping device to be easily moved along the respective contour, for example along the slot-like outer peripheral contour, which facilitates the mounting of the other components.

[0024] It is conceivable that this configuration is provided only on the part side (at least on the inner circumferential surface of the circumferential flange and / or the opening) and that the elastomeric body is designed to have a circular cross section, at least in the contact area with the first part. Firstly, this makes it possible to influence the ratio between axial and radial stiffness. Secondly, a contour of the inner circumferential surface of the circumferential flange and / or the opening that deviates from a circular contour allows different characteristic curves, in particular with regard to the linear spring stiffness. Thirdly, these advantages can be realised without a corresponding adaptation of the elastomeric body, which can therefore be or remain circular in cross section, at least in the contact area with the first part. Thus, no new vulcanisation tools need to be provided.

[0025] According to another development of the assembly according to the invention, the damping device can have at least one axial stopper projecting radially outward, preferably two axial stops projecting radially outward, which are preferably arranged at one end of the damping device or preferably at opposite ends of the damping device. The axial stopper can preferably be circular in cross section, in order to be non-directional. The at least one axial stopper can be formed, preferably integrally, with the elastomeric body, from the same material. Alternatively, it is conceivable that only one of the two axial stops is formed, preferably integrally, with the elastomeric body, from the same material, and that the second axial stopper adjacent to the elastomeric body is connected to the inner sleeve. The at least one axial stopper can project radially from a leg or a fold of the elastomeric body. The at least one axial stopper can have multiple functions. It can act as an axial movement limit of the first part and / or the other part and can buffer the axial stop. It is conceivable that the at least one axial stopper at least partially covers the axial surface of the first part. Furthermore, at least one axial stop can ensure a secure attachment of the damping device and prevent it from coming off the opening. Since the present invention does not require an outer sleeve that is normally pressed into the opening, the fit between the elastomeric body and the opening can provide a secure attachment even without an outer sleeve. By providing two axial stops, a damping device with axial stops in both spatial directions along the central longitudinal axis can be realized.

[0026] According to another possible 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, which makes it possible to form a compact elastomeric body.

[0027] According to another possible development of the assembly according to the invention, the safety against unmating can also be additionally improved by the fact that the material thickness of the elastomeric body in the region surrounding the circumferential flange corresponds at least partially to at least the first longitudinal contact length. The material thickness can be defined perpendicular to the center line of the elastomeric body. This material thickness can be provided at least in the region of the axial stop supporting the circumferential flange and in the region on the inner circumference of the circumferential flange. The region surrounding the circumferential flange can form a groove. As a result, a sufficient material thickness is provided to resist the unmating forces.

[0028] According to another development of the assembly according to the invention, the or at least one of the axial stops can have mounting slots extending in the radial direction and preferably arranged equidistantly from each other with respect to the central longitudinal axis. Preferably, the only axial stop with a mounting slot is the one that is guided through the opening during assembly of the damping device. This allows this axial stop to be easily folded during assembly, to avoid substantial stresses and damage, thus reducing the required assembly forces. This axial stop can be in the form of an umbrella and can therefore be snapped open to its end position or snapped out of the opening after passing through or being fully inserted into the opening. The mounting slot can extend over approximately half the radial extent of the respective axial stop, resulting in a preferred configuration for easy assembly and reliable functioning of the axial stop.

[0029] According to another possible development of the assembly according to the invention, one or at least one of the axial stops and / or the circumferential projection can be preferably geometrically designed in such a way that during assembly of the damping device into the opening, the corresponding axial stop is supported on the elastomeric body axially below or adjacent to the circumferential projection. Preferably, this is affected by the axial stop that is guided through the opening during assembly of the damping device. The elastomeric body can form a corner of the assembly into which the axial stop can be inserted during assembly. The corner of the assembly can be a step and / or its radial depth can correspond at least to the material thickness of the axial stop to be inserted. Firstly, this can prevent the axial stop and the circumferential projection from radially overlapping during assembly, thus avoiding large assembly forces. Secondly, the circumferential projection can advantageously prevent the corresponding axial stop from engaging the circumferential flange during assembly and thus being unable to be fitted.

[0030] According to another development of the assembly according to the invention, one axial stop or at least one of the axial stops can be arranged on the elastomeric body, preferably on a fold of the elastomeric body or in the longitudinal direction adjacent to the elastomeric body or its fold. At least one axial stop can be formed together with the elastomeric body, preferably integrally, from the same material. Alternatively, it is conceivable that the axial stop is connected adjacent to the elastomeric body to the inner sleeve, preferably vulcanized thereon. Between this axial stop and the elastomeric body, a connecting elastomer skin can be present, which is for manufacturing reasons and allows to simplify the vulcanization tool. However, this does not result in a forced connection of this adjacent axial stop and the elastomeric body, i.e. a deformation of one of the axial stop and the elastomeric body does not necessarily lead to a deformation of the other. It is precisely the adjacent arrangement of the axial stops that allows the axial stop to be used as a damping device for high-frequency vibrations. The axial stop can vibrate freely from the elastomeric body without affecting the elastomeric body. This adjacent axial stop does not have a retaining function. The adjacent arrangement of the axial stops also means that there is no relative movement between the axial stops and the elastomeric body, which avoids wear and soft inherent shapes that accompany dynamic hardening in the elastomeric body. The adjacent axial stops can be designed and / or arranged in such a way that they do not support the first part in the assembled state, but can instead support the other (second) part. This arrangement improves the absorption function.

[0031] According to another possible development of the assembly according to the invention, at least one of the axial stops can be arranged on the elastomeric body in such a way that its centre line on the centre line of the elastomeric body makes an angle with the central longitudinal axis in the range of 0° to 45°. This improves the axial stopper's departure from the opening or its departure from the opening to its end position after passing through the opening or after being inserted deep enough into the opening, the axial stopper being preloaded during insertion, the preload increasing as the angle decreases. This effect is increased if the axial stopper is arranged on a fold, which can generate a whip-like preload, thus allowing the axial stopper to leave or come out of the opening.

[0032] According to another possible development of the assembly according to the invention, the or at least one of the axial stops can have a profile. The profiled axial stop can have a profile on the side facing away from the transverse central plane of the damping device. The profile can be, for example, a circular wave profile, a radial wave profile or a checkerboard grid or can be formed by a dome like point. The profiled axial stop can alternatively or additionally have a profile on its circumferential surface. For example, the mounting slot is a profile in this sense. In any case, such a profile serves for a smooth transition between the basic stiffness and the progressiveness.

[0033] According to another possible development of the assembly according to the invention, the radially inner connection point of the or at least one of the axial stops to the inner sleeve, to the elastomeric body or to the leg of the elastomeric body can be located in the circumferential flange when viewed in the longitudinal direction, which makes it easier to thread the respective axial stop through the opening during assembly.

[0034] According to another development of the assembly according to the invention, it is possible to provide further parts which are connectable to the damping device and preferably have a stop surface which can be arranged axially adjacent to an axial stop or one of the axial stops, the (first and / or second) longitudinal distance between this axial stop and the stop surface being equal to or smaller than the overlap distance between this axial stop and the first part. The further parts can include, for example, a stop plate and the compressor to be damped. The further parts can be used in an advantageous manner to prevent disengagement. This embodiment actually serves to ensure that after the longitudinal adjustment of the damping device, one of these further parts abuts against the corresponding axial stop before the damping device disengages. The abutment is therefore used as an additional holding force.

[0035] According to other possible developments of the assembly according to the invention, the elastomeric body can have at least a one-sided bellows profile and / or form folds and / or be U-shaped when viewed in longitudinal section. Thus, when viewed in longitudinal section, the elastomeric body can have a first leg that can be connected to the inner sleeve, a second leg that can surround the first leg at the periphery and a fold that connects the two legs to each other. At the first leg, the inner sleeve can be cohesively vulcanized. The fold also allows for a spring capacity, especially in the longitudinal direction. This design also allows for very flexible support properties.

[0036] According to another possible development of the assembly according to the invention, the elastomeric body can have a centerline which, when viewed in longitudinal section, is radially covered by the circumferential flange in the region of the fold, or at least in the tangential direction of the projection of the circumferential flange in the central longitudinal direction. The centerline can also extend only through the leg. This relationship between the circumferential flange and the fold is used to prevent dislodging, in that the circumferential flange holds and supports the fold in the central longitudinal direction.

[0037] According to another possible development of the assembly according to the invention, the (third) longitudinal distance between the fold and the circumferential flange may be at least 2 mm. This longitudinal distance may be located between the mounting surface of the circumferential flange and / or the surface of the fold facing the circumferential flange. Smaller dimensions limit the damping function.

[0038] Other features, details and advantages of the invention will become apparent from the claims and the following description of embodiments, taken in conjunction with the drawings, in which: [Brief description of the drawings]

[0039] [Figure 1] 1 is a schematic perspective view of a damping device according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a longitudinal sectional view of the damping device of FIG. [Diagram 3] FIG. 6 is a longitudinal sectional view of a damping device according to a second embodiment. [Figure 4] 2 is a longitudinal section through an assembly according to the invention comprising the damping device of FIG. 1; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0040] In the figures, identical or corresponding elements are respectively provided with the same reference numbers and will not be described again unless inconvenient. Features already described will not be described again to avoid repetition and will apply to all elements with the same or corresponding reference numbers, unless explicitly excluded. The disclosure in this specification can be analogized to identical parts having the same reference numbers or the same part names as a whole. In addition, the positional indications selected in this specification, such as upper / top, lower / bottom, side, etc., are related to the currently described and illustrated figures and are analogized to new positions in case of positional changes. Furthermore, individual features or combinations of features from different exemplary embodiments shown and described can also constitute independent solutions or inventive solutions according to the present invention.

[0041] The radial direction R extends starting from the central longitudinal axis A, the circumferential direction U extends around the central longitudinal axis A, and the transverse central plane Q is disposed such that its normal vector lies on the central longitudinal axis A. The longitudinal direction L extends parallel to the central longitudinal axis A.

[0042] FIG. 1 shows the 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 and / or in the direction of the central longitudinal axis A. The damping device 2 can be rotationally symmetrical with respect to the central longitudinal axis A. To connect the damping device 2 to the parts 200, 300, fastening members 400, e.g. screws, as shown in FIG. 4, can be passed through the bore 6. An elastomeric body 8 is vulcanized onto the inner sleeve 4 and serves to fasten the damping device 2 to the first part 100. It can be seen that the damping device 2 is designed without an outer sleeve.

[0043] As can be seen with reference to Fig. 2, the damping device 2 has an axial stop 18 projecting radially outwardly, which is an axial stop lying opposite to the insertion direction E, and an axial stop 20 projecting radially outwardly, which is an axial stop lying in the insertion direction E. The axial stops 18, 20 are arranged on opposite end sides of the damping device 2 or of the elastomeric body 8 and have a circular cross section. The axial stops 18, 20 are integrally formed of the same material as the elastomeric body 8 and are connected to the second legs 30 at connection points 24, respectively. In particular, as shown in Fig. 1, the axial stops 20 have mounting slots 22 extending in the radial direction R and arranged equidistant from each other with respect to the central longitudinal axis A.

[0044] FIG. 2 shows that the elastomeric body 8 has a bellows profile K. The elastomeric body 8 comprises a first leg 28, to which the inner sleeve 4 is vulcanized, and a second leg 30, which surrounds the first leg 28 at its outer periphery. A 180° bend 26 connects the two legs 28, 30 to each other. It can also be seen that the elastomeric body 8 has a centerline 32, which runs centrally through the legs 28, 30 and the fold 26 of the elastomeric body 8. The first leg 28, either individually or together with the second leg 30, serves as a radial buffer or radial stop.

[0045] The axial stop 18 projects outwardly from the second leg 30 at right angles to the radial direction R. The axial stop 20 has a centerline 34. The centerline 34 of the axial stop 20 is tangent to the centerline 32 of the elastomeric body 8 in the region of the fold 26. At this point, the centerline 34 of the axial stop 20 forms an angle W with the central longitudinal axis A ranging from 0° to 45°. In its distal region, the axial stop 20 extends in the radial direction R, possibly parallel to the axial stop 18.

[0046] In the longitudinal direction L between the two axial stops 18, 20, the elastomeric body 8 has at its outer periphery a circumferential projection 16 which projects outward in the radial direction R. It can be seen that the circumferential projection 16 has a square or trapezoidal longitudinal section or an approximately square or trapezoidal longitudinal section in the unloaded state shown in Figs. 2 and 3. The corners of the longitudinal section can be rounded for reasons related to the manufacturing process. In its distal region, the circumferential projection 16 starts from the second leg 30 and extends in the radial direction R, possibly parallel to the axial stop 18. The circumferential projection 16 is integral with the elastomeric body 8 and consists of the same material.

[0047] For fastening to the first part 100, the elastomeric body 8 has a peripheral groove 10. The groove 10 is an outer circumferential groove and has a rectangular longitudinal section. Furthermore, the groove 10 has a groove bottom 12 and two adjacent groove walls 14, which are formed on the one hand by an axial stop 18 and on the other hand by a circumferential projection 16. A three-sided groove is thus formed.

[0048] The inner sleeve 2 has a greater longitudinal extension than the elastomeric body 8. The inner sleeve 2 is completely covered on its outer periphery by elastomer, which is partly a result of the manufacturing process, and is therefore only provided in one end region with an elastomeric skin 36 which does not have the function of the elastomeric body 8.

[0049] In order to avoid repetition, only the differences from FIG. 2 will be described below with respect to FIG. 3. In the damping device shown in FIG. 2, the axial stop 20 is integrally formed from the same material as the elastomeric body 8 itself, whereas a second axial stop 20 is now attached to the inner sleeve 2 adjacent to the elastomeric body 8. Between this adjacent axial stop 20 and the elastomeric body 8, an elastomeric skin 36 is present on the inner sleeve 2, which results from the manufacturing process and has no effect on the elastomeric body 8 and the adjacent axial stop 20. In this embodiment, the adjacent axial stop 20 can be used as a damping device for high-frequency vibrations. The adjacent axial stop 20 projects perpendicularly outwards from the inner sleeve 2 in the radial direction R.

[0050] FIG. 4 shows an assembly 1 with a damping device 2 according to FIGS. 1 and 2, a damping device 2 according to FIG. 3 could in principle also be used here.

[0051] In addition to the damping device 2, the assembly 1 comprises a first part 100, which may be a frame. The first part 100 has an opening 102 designed as a through hole, on both sides of which the damping device 2 can be connected to the respective part 200, 300. The opening 102 has an inner peripheral surface 104 and a central longitudinal axis A passing through its centre. The damping device 2 is inserted or press-fitted into this opening 102 in the direction of an insertion direction E. In the assembled state, a press-fit is thus formed between the damping device 2 and the opening 102.

[0052] During assembly, the axial stop 20 is inserted into and guided through the opening 102 in an insertion direction E. After passing through the opening 102 or being inserted sufficiently deep into the opening 102, the axial stop 20 snaps away into the end position shown and rests on the first part 100.

[0053] The axial stop 20 and / or the circumferential projection 16 are designed such that during mounting of the damping device 2 in the opening 102, the axial stop 20 contacts the elastomeric body 8 axially below or adjacent to the circumferential projection 16. The length and / or the connection point 24 of the axial stop 20 can be dimensioned and / or positioned, for example, such that the axial stop 20 is located at a mounting corner 38 that may be formed by the circumferential projection 16 during assembly. The axial stop 20 also receives a preload force from the fold 26 that contributes to the snap-open action. The radially inner connection point 24 of the axial stop 20 is within the circumferential flange 106 or the first diameter D1 when viewed in the longitudinal direction L.

[0054] The opening 102 has two adjacent portions in the longitudinal direction L. One portion has a circumferential flange 106, and the other is a cylindrical mounting portion 108 disposed directly adjacent to the circumferential flange 106. The circumferential flange 106 projects radially inwardly in the radial direction R and fits into the groove 10. The circumferential flange 106 is surrounded on three sides. The circumferential flange 106 has at least one contact surface 110 with the groove 10, on which the groove wall 14 rests.

[0055] The groove 10 and the circumferential projection 16 each have an outer peripheral contour that is circular in cross section, and the circumferential flange 106 and the mounting portion 108 of the opening 102 each have an inner peripheral contour that is circular in cross section.

[0056] It can be seen that in the assembled state, the centerline 32 extends so as to be radially overlapped by the circumferential flange 106 in the region of the fold 26, or at least tangent to a projection of the circumferential flange in the direction of the central longitudinal axis A. The centerline 32 is not shown for purely representational reasons, even if it is also present in the region of the first leg 28.

[0057] Other parts 200, 300 are connected to the damping device 2, on the one hand a second part 200 which may be a compressor or a compressor carrier, and on the other hand a third part 300 which may be a stop plate. The parts 200, 300 each have a stop surface 202, 302 which is arranged axially adjacent to the corresponding axial stop 18, 20. A fastening member 400 passes through the third part 300 and the inner sleeve 4 and positively engages with the thread 204 of the second part 200.

[0058] A first longitudinal contact length L1 extending in the longitudinal direction L is formed along the groove bottom 12 of the groove 10 and the circumferential flange 106 or its radially inner side 112, the first longitudinal contact length L1 indicating the distance at which the groove bottom 12 and the circumferential flange 106 contact each other. The first longitudinal contact length L1 can be in the range of 2 mm to 15 mm. The material thickness of the elastomeric body 8 in the area surrounding the circumferential flange 106 corresponds at least in part to the first longitudinal contact length L1, whereby in the present embodiment this applies to the area of ​​the axial stop 18 in contact with the circumferential flange 106 and the elastomeric body 8 on the inner peripheral side of the circumferential flange 106.

[0059] Between the elastomeric body 8 or its circumferential projection 16 and the inner circumferential surface 104 or the mounting portion 108, a second longitudinal contact length L2 is formed, which extends in the longitudinal direction L. The second longitudinal contact length L2 indicates the distance over which the elastomeric 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 mounting portion 108. The second longitudinal contact length L2 may be at least 1.5 mm. In the area of ​​the second longitudinal contact length L2, the elastomeric body 8 is in uninterrupted contact with the inner circumferential surface 104 in the circumferential direction U. The ratio of the second longitudinal contact length L2 to the first longitudinal contact length L1 may be greater than 0.75 (L2 / L1>0.75).

[0060] A (first) longitudinal distance L3 extending in the longitudinal direction L may exist between the axial stop 20 and the stop surface 202. The (first) longitudinal distance L3 indicates the distance over which the axial stop 20 and the stop surface 202 can move relative to each other until they butt against each other and the axial stop 20 buffers the butt of the second part 200.

[0061] A (second) longitudinal distance L4 extending in the longitudinal direction L may exist between the axial stop 18 and the stop surface 302. The (second) longitudinal distance L4 indicates the distance over which the axial stop 18 and the stop surface 302 can move relative to each other until they butt against each other and the axial stop 18 buffers the abutment of the third part 300.

[0062] A (third) longitudinal distance L5 extending in the longitudinal direction L may be present between the fold 26 and the circumferential flange 106 and may be at least 2 mm. The (third) longitudinal distance L5 denotes 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 hand.

[0063] The longitudinal length of the opening 102 is denoted as 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 may be in the range of 2-5.

[0064] The first diameter D1 is defined by the circumferential flange 106 and indicates the distinct width of the opening 102 in the region of the circumferential flange 106. The ratio of the diameter of the elastomeric body 8 in the groove bottom 12 in the unloaded state of the elastomeric body 8 to the diameter D1 of the circumferential flange 106 can be greater than 1.03.

[0065] The second diameter D2 is defined by the attachment portion 108 and indicates the defined width of the opening 102 in the region of the attachment portion 108, which is at the same time the maximum diameter of the opening 102 shown in the illustrated embodiment. The ratio of the diameter of the elastomeric body 8 in the unloaded state of the elastomeric body 8 in the part designed to contact the inner circumferential surface 104, in particular 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 can be greater than 1.03. The difference between the second diameter D2 and the first diameter D1 can be greater than 5 mm.

[0066] The axial stopper 20 contacts the front surface of the first part 100. The distance of this overlap is defined as a (first) overlap distance D3. The (first) longitudinal distance L3 can be smaller than this (first) overlap distance D3.

[0067] The axial stop 18 also contacts the front surface of the first part 100. This overlap distance is referred to as a (second) overlap distance D4. The (second) longitudinal distance L4 can be smaller than this (second) overlap distance D4.

[0068] The present invention is not limited to one of the above-described embodiments, but can instead be modified in many different ways. All the features and advantages that are evident from the claims, detailed description and drawings, including the structural details, spatial arrangement and method steps, can be essential to the present invention, both individually and in a very wide variety of combinations.

[0069] Any combination of at least two of the features disclosed in the specification, the claims and / or the drawings falls within the scope of the invention.

[0070] To avoid repetition, features disclosed in the context of an apparatus may also be considered and claimed as being disclosed in the context of a method, and similarly, features disclosed in the context of a method may also be considered and claimed as being disclosed in the context of an apparatus. [Explanation of symbols]

[0071] 1 assembly 2. Damping device 4 Inner Sleeve 6 holes 8 Elastomer body 10 grooves 12 Groove bottom 14 Groove Wall 16 Circumferential protrusion 18 Axial stopper 20 Axial stopper 22 Mounting slots 24 Connection points 26 Creases 28 First Leg 30 Second leg 32 Center line 34 Center line 36 Elastomer Leather 38 Mounting corner 100 1st part 102 Opening 104 Inner surface 106 Circumferential flange 108 Mounting part 110 Contact surface 112 Inner surface 200 Other (second) parts 202 Stopping surface 204 Screw 300 Other (third) parts 302 Stopping surface 400 Fastening members A central longitudinal axis D1 diameter D2 diameter D3 Overlap distance D4 Overlap distance E Insertion direction K Bellows Profile L Longitudinal L1 Longitudinal contact length L2 Longitudinal contact length L3 Longitudinal distance L4 Longitudinal distance L5 Longitudinal distance L6 Length Q Transverse center plane R Radial direction

Claims

1. a first part (100) including an opening (102) having an inner periphery (104); a damping device (2) through which a central longitudinal axis (A) passes; The damping device (2), an inner sleeve (4) with holes (6) designed for fixing the damping device (2) to other parts (200, 300); an elastomeric body (8) for fixing the damping device (2) to the first part (100), the elastomeric body (8) surrounding an outer periphery of the inner sleeve (4) and supported in a preloaded manner against the inner circumferential surface (104), An assembly, wherein the damping device (2) is designed without an outer sleeve.

2. the opening (102) having a radially inwardly projecting circumferential flange (106); and The elastomeric body (8) has a circumferential groove (10), 2. The assembly of claim 1, wherein the circumferential flange (106) fits into the circumferential groove (10), and preferably a first longitudinal contact length (L1) is defined along a groove bottom (12) and the circumferential flange (106).

3. 3. The assembly according to claim 1 or claim 2, wherein in the unloaded state of the elastomeric body (8), the ratio of the diameter of the elastomeric body (8) in a portion designed to contact the circumferential flange (106) to the diameter (D1) of the circumferential flange (106) or to the maximum diameter of the circumferential flange (106) is greater than 1.

03.

4. 4. An assembly according to claim 1, wherein the ratio of the diameter of the elastomeric body (8) in the unloaded state of the elastomeric body (8) designed to be in contact with the inner circumferential surface (104), in particular in the region of the second longitudinal contact length (L2), to the diameter (D2) of the opening (102) or to the maximum diameter of the opening (102) is greater than 1.

03.

5. 5. An assembly according to any one of claims 1 to 4, wherein the difference between the second diameter (D2) and the first diameter (D1) is greater than 5 mm.

6. the groove (10) and / or circumferential projection (16) has a peripheral profile that is circular, elliptical, oval, or elongated in cross section; 6. An assembly according to any one of claims 1 to 5, wherein the circumferential flange (106) and / or the inner peripheral surface (104) and / or the mounting portion (108) have an inner peripheral profile which is circular in cross section.

7. 7. An assembly according to any one of claims 1 to 6, wherein the damping device (2) has at least one axial stop (18, 20) protruding radially outwardly, preferably two axial stoppers (18, 20) protruding radially outwardly, which axial stoppers (18, 20) are preferably arranged on an end side of the damping device (2) or preferably arranged on opposite end sides of the damping device (2).

8. 8. An assembly according to any one of claims 1 to 7, wherein the or at least one of the axial stops (18, 20) has mounting slots (22) extending in a radial direction (R) and preferably arranged equidistantly relative to the central longitudinal axis (A).

9. 9. An assembly according to any one of claims 1 to 8, wherein the or at least one of the axial stops (18, 20) is arranged on the elastomeric body (8), preferably on a fold (26) of the elastomeric body (8) or adjacent to the fold (26) of the elastomeric body (8) as viewed in the longitudinal direction (L).

10. 10. An assembly according to any one of claims 1 to 9, comprising a further part (200, 300) connectable to the damping device (2) and preferably having a stop surface (202, 302) axially adjacent to one of the axial stops (18, 20) or to one of the axial stops (18, 20), wherein a longitudinal distance (L3, L4) between the axial stop (18, 20) and the stop surface (202, 302) is less than or equal to an overlap distance (D3, D4) between the axial stop (18, 20) and the first part (100).

Images