Assembly containing an elastomer 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 present invention relates to an assembly having an elastomeric body as described in claim 1.

Background Art

[0002] It has been conventionally known to elastically attach one part to another part by a spring member. In order to attenuate vibrations, the spring member is fixed to an opening of one part, and the other part is connected to the spring member.

[0003] An assembly of the above-described type is used in an automobile structure to reduce vibrations transmitted from one part, for example, an engine or a compressor, to another part, for example, a vehicle part, even during running or stopping, thereby improving driving comfort.

[0004] However, this drawback is that a vulcanization tool having a complex and multi-part design must be configured in order to be able to release the complex shape of the spring member and / or to allow many insert parts in the vulcanization tool. Such insert parts, for example, the outer sleeve of an elastomeric bush, also have problems in terms of press-fitting with subsequent parts and tolerances for safe operation. On the other hand, a spring member without a sleeve does not provide satisfactory safety against detachment from the opening.

Summary of the Invention

[0005] Therefore, an object of the present invention is to provide an assembly that enables improved and at the same time cost-efficient manufacturing and assembly, and at the same time improves and ensures the attachment of a damping device during operation. The main features of the present invention are specified in claim 1. The improvements are the subject matter of claims 2 to 10.

[0006] Accordingly, according to the present invention, the damping device comprises a first component having an opening with an inner circumferential surface, and a damping device through which a central longitudinal axis passes, wherein the damping device comprises an inner sleeve having a hole designed for fixing the damping device to another component, and an elastomer body for fixing the damping device to the first component, the elastomer body surrounding the outer circumference of the inner sleeve and supported with preload applied to the inner circumferential surface, the damping device is designed without an outer sleeve, and the outer circumferential surface is formed by the elastomer body, preferably in the contact area with the first component, more preferably completely.

[0007] According to the present invention, the damping device can already be manufactured more cost-effectively due to the fact that an outer sleeve is unnecessary and the elastomer body comes into direct contact with the inner circumferential surface (without an intermediate outer sleeve). As a result, the vulcanization tool becomes simpler, as only an inner sleeve is inserted therein. Overall, the present 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 connection to the first part by press-fitting, for example. As the elastomer body comes into contact with the first part, its deformability plays a role in compensating for the tolerances. Furthermore, it is no longer necessary to ensure a secure press-fit of the outer sleeve, and the corresponding assembly process does not need to be monitored. The omission of the outer sleeve results in at least a partial elastic circumferential region of the elastomer body, and as a result, the axial and / or radial stiffness ratio can be easily adjusted. The damping device can be designed to be rotationally symmetric about the central longitudinal axis.

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

[0009] The damping device can be inserted or press-fitted into the opening along the insertion direction, thereby forming an interference fit with the second case. The damping device or its elastomer body may have a dimensional overlap with respect to the opening, preferably radially, thereby providing preload, ensuring a tight interference fit of the damping device in the opening, and simultaneously providing tolerance compensation for the first component. For this purpose, for example, the elastomer body may have a diameter larger than the diameter of the opening at least partially in the respective contact areas in the assembled state between the first component and the damping device. It is precisely this press-fit that enables the structural configuration of the opening and / or the elastomer body, which can affect both the overall axial and / or radial stiffness and specific adjustments between the axial and radial damping behavior. In this case, the adjustment of the stiffness ratio can be influenced by various approaches, which are the subject of favorable embodiments.

[0010] Therefore, damping devices can be used to dampen vibrations in components such as compressors.

[0011] The assembled state should be understood as the state in which the damping device is finally held within the opening after installation. The unloaded state should be understood as the state before assembly. The diameter should be understood mathematically as the chord or chord length passing through the center point of the corresponding body. The relationship between the damping device and the first component is described in the assembled state in principle, unless explicitly stated otherwise, such as in the unloaded state or the pre-assembly state. The outer sleeve is, for example, a cylindrical sleeve made of plastic or metal, which usually surrounds the elastomer body on its outer circumference. 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 there is no outer sleeve covering the outer circumference of the elastomer body.

[0012] In another development of the assembly according to the present invention, the opening has a circumferential flange projecting radially inward, and the elastomer body has a circumferential groove, thereby allowing the circumferential flange to be securely fitted into the groove. Preferably, the first longitudinal contact length can be formed along the groove bottom and along the circumferential flange. The first longitudinal contact length indicates the distance in the direction of the central longitudinal axis at which the first component and the elastomer body are in contact with each other in this region. The circumferential flange can be an inner flange, and the groove can be an outer groove. This connection between the flange and the groove ensures secure mounting of the damping device. The groove has a groove bottom and two groove walls adjacent to the groove bottom, and can be designed so that the flange engages on three sides. Thus, secure mounting is ensured in two opposite spatial directions along the central longitudinal axis.

[0013] According to another conceivable development of the assembly according to the present invention, the opening can form a cylindrical mounting portion, i.e., a portion of a certain diameter, adjacent to, preferably directly adjacent to, the circumferential flange. The elastomer body can support itself with respect to this mounting portion. Furthermore, the opening can be configured as simply as possible and the damping device can be fixed in a reliable manner.

[0014] According to another conceivable development of the assembly according to the present invention, the circumferential flange may have at least one mounting surface for the elastomer body, preferably for its groove, and the mounting surface may have a conical shape. Viewed in longitudinal section, the mounting surface may be inclined in the central longitudinal axis direction and the insertion direction, thereby the mounting surface may surround an angle with the central longitudinal axis, preferably in the range of 60° to 90°. This can safely prevent the damping device from coming out 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 elastomer body can be optimized from the viewpoint of operational functionality without the possibility of adverse effects from insertion from multiple directions.

[0015] In another conceivable development of the assembly according to the present invention, the first longitudinal contact length can be in the range of 2 mm to 15 mm. Thus, the groove bottom contacts the circumferential flange in the central longitudinal direction over a distance of 2 mm to 15 mm. This range represents the optimal range between sufficient radial stopping function (lower limit) for the elastomer body to buffer radial abutment between the inner sleeve and the flange in the region of its groove bottom, and sufficient economic efficiency (upper limit) because a first longitudinal contact length exceeding 15 mm can only be manufactured at considerable cost. Of course, the same effect can be obtained beyond the aforementioned limits in each boundary region, but in some cases, it may be in a weakened form.

[0016] In another conceivable development of the assembly according to the present invention, the elastomer body may have a circumferential projection projecting radially outward, the circumferential projection supporting the inner surface over a second longitudinal contact length of at least 1.5 mm. Thus, the circumferential projection contacts the inner surface in the central longitudinal direction over a distance of at least 1.5 mm. The second longitudinal contact length may be in the region of a cylindrical mounting portion that provides additional fastening beyond the connection between the flange and the groove. The ratio of the length of the opening in the central longitudinal direction to the second longitudinal contact length may also be in the range of 2 to 5, preferably 2.5 to 3.5. These dimensions play a particular role in ensuring a secure and durable mounting of the damping device. This second longitudinal contact length can be used to favorably adjust the axial and radial stiffness ratio of the assembly. The second longitudinal contact length may be dimensioned such that the stiffness ratio of radial stiffness to axial stiffness is in the range of 0.6 to 2.4. Radial stiffness increases as the second longitudinal contact length increases, while axial stiffness remains unaffected. The circumferential projections may form groove walls and / or contact the mounting surface of the circumferential flange. This allows for the formation of a compact elastomer body. The circumferential projections can be formed integrally with the elastomer body, preferably in the same material. The circumferential projections can project radially from the legs of the elastomer body. Of course, similar effects can be obtained in each boundary region beyond the aforementioned limits, although in some cases, they may be weaker.

[0017] According to other conceivable developments of the assembly according to the present invention, the circumferential projection may have a square, rectangular, or trapezoidal longitudinal cross-section in an unloaded state. These shapes can influence the second longitudinal contact length and allow for advantageous adjustment of the axial and radial stiffness ratio of the assembly.

[0018] According to another conceivable development of the assembly according to the present invention, in a region of a second longitudinal contact length, the elastomer body can be in continuous contact with the inner surface in the circumferential direction. As a result, the stiffness ratio can be made independent of the application of force from any radial direction.

[0019] In another conceivable development of the assembly according to the present invention, the ratio between the second longitudinal contact length and the first longitudinal contact length can be greater than 0.75. This ratio allows for advantageous adjustment of the axial and radial stiffness ratio of the assembly. A larger ratio results in greater radial stiffness relative to axial stiffness. Of course, a similar effect can be obtained in the boundary region beyond this limit, although it may be weaker in some cases.

[0020] In another development of the assembly according to the present invention, the ratio of the diameter of the elastomer body in the portion designed to contact the circumferential flange to the diameter of the circumferential flange, or the maximum diameter of the circumferential flange, can be greater than 1.03 in the unloaded state of the elastomer body. The portion of the elastomer body supported by the circumferential flange in this case can be the bottom of the groove. This dimension, which overlaps by at least 3%, serves to ensure a secure and durable mounting of the damping device. The diameter of the groove bottom in the unloaded state can be 3% larger than the diameter of the circumferential flange. Of course, a similar effect can be obtained in the boundary region beyond the limits described above, although it may be weaker in some cases.

[0021] In another development of the assembly according to the present invention, the ratio of the diameter of the elastomer body in the portion designed to contact the inner circumferential surface, particularly the diameter of the elastomer body in the region of the second longitudinal contact length, to the diameter of the opening, which can be the second diameter, or the maximum diameter of the opening, in the unloaded state of the elastomer body, can be greater than 1.03. This dimension, which overlaps by at least 3%, also serves to ensure a secure and durable mounting of the damping device and affects the stiffness ratio of the assembly in the axial and radial directions. A larger ratio results in greater radial stiffness. The diameter of the unloaded circumferential projection can be 3% larger than the diameter of the cylindrical mounting portion. Of course, similar effects can be obtained in boundary regions beyond the above limits, although they may be weaker in some cases.

[0022] In another development of the assembly according to the present invention, the difference between the second diameter and the first diameter can be greater than 5 mm. This makes it possible to achieve a radial shoulder having a radial length of at least 2.5 mm. This dimension is particularly useful in ensuring a secure and durable mounting of the damping device. Of course, the same effect can be obtained in the boundary region beyond the aforementioned limits, although it may be weaker in some cases.

[0023] In other developments of the assembly according to the present invention, the grooves and / or circumferential projections may have a circular, elliptical, oblong, or elongated hole-like outer profile in cross-section, and / or the circumferential flanges and / or inner surfaces and / or mounting portions of the openings may have an inner profile with a circular cross-section. The inner surface of the opening may preferably be designed in this way in a region of at least a second longitudinal contact length. The connection between the flange and the groove may be non-circular, resulting in different clearances, different preloads, and / or stiffness in different radial directions. The same applies to the contact region of the inner surface or the region of the second longitudinal contact length. Furthermore, this allows the inner sleeve to be positioned within the opening so as to be movable, for example, in the lateral direction (a direction perpendicular to the central longitudinal axis). This facilitates the mounting of other components, as the damping device can be easily moved along its respective profile, for example, along the elongated hole-like outer profile.

[0024] This configuration may be provided only on the component side (at least the inner surface of the circumferential flange and / or opening), and the elastomer body may be designed to have a circular cross-section at least in the contact area with the first component. Firstly, this makes it possible to influence the ratio of axial stiffness to radial stiffness. Secondly, the contour of the circumferential flange and / or the inner surface of the opening, which deviates from the circular contour, allows for different characteristic curves, particularly with respect to linear spring stiffness. Thirdly, these advantages can be achieved without adapting the elastomer body accordingly, and therefore the cross-section can be circular or remain circular at least in the contact area with the first component. Thus, there is no need to prepare a new vulcanization tool.

[0025] In other developments of the assembly according to the present invention, the damping device may have at least one axial stopper projecting radially outward, preferably two axial stoppers projecting radially outward, and these axial stoppers may be located on one end of the damping device or preferably at opposite ends of the damping device. The axial stoppers may preferably have a circular cross-section to be non-directional. At least one axial stopper may be formed together with the elastomer body, preferably integrally, of the same material. Alternatively, only one of the two axial stoppers may be formed together with the elastomer body, preferably integrally, of the same material, and a second axial stopper adjacent to the elastomer body may be connected to an inner sleeve. At least one axial stopper may project radially from a leg or fold of the elastomer body. At least one axial stopper can have many functions. It may function as a limiter on the axial movement of the first and / or other parts and may buffer axial stopping. At least one axial stopper may at least partially cover the axial surface of the first part. Furthermore, at least one axial stopper can ensure secure mounting of the damping device and prevent it from coming loose from the opening. In this invention, since an outer sleeve, which is normally press-fitted into the opening, is unnecessary, secure mounting can be achieved through fitting between the elastomer body and the opening, even without an outer sleeve. By providing two axial stoppers, a damping device can be realized that has axial stoppers in both spatial directions along the central longitudinal axis.

[0026] According to another conceivable development of the assembly according to the present invention, at least one axial stopper or one of two axial stoppers can form a groove wall. This makes it possible to form a compact elastomer body.

[0027] According to another possible development of the assembly according to the invention, the material thickness of the elastomeric body in the region surrounding the circumferential flange can additionally improve the safety against disengagement, due to the fact that it at least partially corresponds 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 stopper supporting the circumferential flange and in the region on the inner circumferential side of the circumferential flange. The region surrounding the circumferential flange can form a groove. As a result, a material thickness sufficient to counteract the force for disengaging the fit is provided.

[0028] According to another development of the assembly according to the invention, one axial stopper or at least one of the axial stoppers can have mounting slots that extend radially and are preferably arranged equidistant from each other with respect to the central longitudinal axis. Preferably, the only axial stopper having the mounting slots is guided through the opening during the assembly of the damping device. Thereby, in order to avoid substantial stress and damage, this axial stopper can be easily folded during assembly, and thus the required assembly force can be reduced. This axial stopper can be in the form of an umbrella and can thus snap open to its end position after passing through the opening or after being sufficiently inserted into the opening, or snap out of the opening. The mounting slots can extend over approximately half of the radial extent of each axial stopper, resulting in a suitable configuration that is easy to assemble and has a reliable function of the axial stopper.

[0029] In other conceivable developments of the assembly according to the present invention, when assembling the damping device into the opening, one axial stopper or at least one of the axial stoppers and / or the circumferential projection can be preferably geometrically designed such that the corresponding axial stopper is supported by an elastomer body axially below the circumferential projection or adjacent to the circumferential projection. Preferably, this affects the axial stopper guided through the opening during the assembly of the damping device. The elastomer body can form a corner of the assembly into which the axial stopper can be inserted during assembly. The corner of the assembly can be stepped, and / or its radial depth can correspond to at least the material thickness of the inserted axial stopper. Firstly, this can prevent the axial stopper and the circumferential projection from overlapping radially during assembly, thereby avoiding large assembly forces. Secondly, the circumferential projection can effectively prevent the corresponding axial stopper from engaging with the circumferential flange during assembly, resulting in failure to mount.

[0030] According to another deployment of the assembly according to the present invention, at least one of the one axial stopper or the axial stoppers can be arranged longitudinally on the elastomeric body, preferably on the fold of the elastomeric body, or adjacent to the elastomeric body or its fold. At least one axial stopper can be formed of the same material together with, preferably integrally with, the elastomeric body. Alternatively, it is also conceivable that the axial stopper is adjacent to the elastomeric body and vulcanized and bonded to the inner sleeve, preferably on it. There may be a connecting elastomeric skin between this axial stopper and the elastomeric body, but this is due to manufacturing reasons and can simplify the vulcanization tool. However, this does not result in a forced bond between this adjacent axial stopper and the elastomeric body, that is, when one of the axial stopper and the elastomeric body is deformed, the other part is not necessarily deformed. It is precisely the adjacent arrangement of the axial stopper that enables the axial stopper to be used as a high-frequency vibration damping device. The axial stopper can vibrate freely from the elastomeric body without affecting the elastomeric body. This adjacent axial stopper has no retaining function. The adjacent arrangement of the axial stopper also means that there is no relative movement between this axial stopper and the elastomeric body, thereby avoiding wear accompanied by dynamic hardening and a flexible intrinsic shape accompanied by dynamic hardening in the elastomeric body. The adjacent axial stopper can be designed and / or arranged so that in the assembled state it does not support the first part but instead can support another (second) part. This arrangement improves the absorption function.

[0031] According to another conceivable development of the assembly according to the present invention, at least one of the axial stoppers can be positioned on the elastomer such that the centerline of the axial stopper on the centerline of the elastomer is angled with the central longitudinal axis in the range of 0° to 45°. This improves the axial stopper from moving away from the opening or detaching from the opening to its end position after passing through the opening or after being inserted sufficiently deep into the opening, and the axial stopper is preloaded during insertion, with the preload increasing as the angle decreases. This effect is amplified when the axial stopper is positioned on a fold, which can generate a whip-like preload, thus allowing the axial stopper to move away from or detach from the opening.

[0032] According to other conceivable developments of the assembly according to the present invention, one axial stopper or at least one of the axial stoppers may have a contour. An axial stopper having a contour may have the contour on the side facing away from the transverse center plane of the damping device. The contour may be, for example, a circular wave contour, a radial wave contour or a checkerboard grid, or may be formed by a dome such as a point. An axial stopper with a contour may, alternatively or additionally, have a contour on its circumferential surface. For example, a mounting slot is a contour in this sense. In any case, such a contour helps to facilitate a smooth transition between basic stiffness and progressiveness.

[0033] According to another conceivable development of the assembly according to the present invention, the radially inward connection point of one axial stopper or at least one of the axial stoppers to the inner sleeve, elastomer body, or leg of the elastomer body can be located within a circumferential flange when viewed longitudinally. This facilitates passing each axial stopper through the opening during assembly.

[0034] According to another development of the assembly according to the present invention, it is possible to provide other components that can be connected to the damping device and preferably have one axial stopper or a stopping surface that can be positioned axially adjacent to one of the axial stoppers, wherein the (first and / or second) longitudinal distance between the axial stopper and the stopping surface is less than or equal to the overlap distance between the axial stopper and the first component. Other components may include, for example, a stop plate and a damped compressor. The other components can be used in a manner convenient for preventing detachment. This embodiment actually helps to ensure that after longitudinal adjustment of the damping device, one of these other components abuts against the corresponding axial stopper before the damping device detaches. Thus, the abutment is used as an additional retaining force.

[0035] According to another conceivable development of the assembly according to the present invention, the elastomer body may have at least one bellows-like contour and / or form a fold and / or be U-shaped when viewed in longitudinal section. Thus, when viewed in longitudinal section, the elastomer body may have a first leg which can be connected to an inner sleeve, a second leg which can surround the first leg on its outer circumference, and a fold which connects the two legs to each other. The first leg can be used to cohesively vulcanize the inner sleeve. The fold also allows for spring capacity, particularly in the longitudinal direction. This design also allows for highly flexible support characteristics.

[0036] According to another conceivable development of the assembly according to the present invention, the elastomer body may have a centerline that, when viewed in a longitudinal section, is radially covered by a circumferential flange in the region of the fold, or at least tangentially covered by a projection of the circumferential flange in the direction of the central longitudinal axis. The centerline may also extend only through the legs. This relationship between the circumferential flange and the fold is used to prevent detachment, in that the circumferential flange holds and supports the fold in the direction of the central longitudinal axis.

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

[0038] Other features, details, and advantages of the present invention will become apparent from the following description of embodiments with reference to the claims and drawings. The drawings are as follows. [Brief explanation of the drawing]

[0039] [Figure 1] This is a schematic perspective view of a damping device according to the first embodiment of the present invention. [Figure 2] Figure 1 is a longitudinal cross-sectional view of the damping device. [Figure 3] This is a longitudinal cross-sectional view of the damping device according to the second embodiment. [Figure 4] Figure 1 is a longitudinal cross-sectional view of the assembly according to the present invention, which is equipped with a damping device. [Modes for carrying out the invention]

[0040] In the figures, identical or corresponding elements are given the same reference numerals and will not be described again unless necessary. Features already described will not be described again to avoid repetition and will apply to all elements having the same or corresponding reference numerals unless explicitly excluded. The disclosures herein as a whole are analogous to identical parts having the same reference numerals or the same part names. Furthermore, positional designations selected herein, such as top / top, bottom / bottom, and side, are related to the currently described and illustrated figures and will be analogously transferred to the new positions if their positions are changed. In addition, individual features or combinations of features from different exemplary embodiments illustrated and described may constitute independent solutions or inventive solutions according to the present invention.

[0041] The radial direction R extends from the central longitudinal axis A, the circumferential direction U extends around the central longitudinal axis A, and the transverse central plane Q is positioned 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] Figure 1 shows a damping device 2 in an unloaded state, which comprises an inner sleeve 4 with through holes or holes 6 in the longitudinal direction L and / or the central longitudinal axis A. The damping device 2 can be rotationally symmetric with respect to the central longitudinal axis A. To connect the damping device 2 to parts 200, 300, fastening members 400, such as screws shown in Figure 4, can be passed through the holes 6. The elastomer body 8 is vulcanized in the inner sleeve 4 and serves to secure 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 Figure 2, the damping device 2 has an axial stopper 18 that lies horizontally opposite to the insertion direction E and protrudes radially outward, and an axial stopper 20 that lies horizontally in the insertion direction E and protrudes radially outward. The axial stoppers 18 and 20 are positioned on the opposing end sides of the damping device 2 or the elastomer body 8 and have a circular cross-section. The axial stoppers 18 and 20 are integrally formed from the same material as the elastomer body 8 and are each connected to the second leg portion 30 at connection points 24. In particular, as shown in Figure 1, the axial stopper 20 has mounting slots 22 that extend radially R and are equidistant from each other with respect to the central longitudinal axis A.

[0044] Figure 2 shows that the elastomer body 8 has a bellows-like contour K. The elastomer body 8 comprises a first leg portion 28 integrally vulcanized with the inner sleeve 4, and a second leg portion 30 surrounding the first leg portion 28 on its outer circumference. A 180° bend 26 connects the two legs 28, 30 to each other. It can also be seen that the elastomer body 8 has a center line 32 extending to the center through the legs 28, 30 and the fold 26 of the elastomer body 8. The first leg portion 28 functions as a radial buffer or radial stopper, either individually or together with the second leg portion 30.

[0045] The axial stopper 18 protrudes outward from the second leg portion 30 at a right angle to the radial direction R. The axial stopper 20 has a centerline 34. The centerline 34 of the axial stopper 20 is in contact with the centerline 32 of the elastomer body 8 in the region of the fold 26. At this point, the centerline 34 of the axial stopper 20 makes an angle W with the central longitudinal axis A in the range of 0° to 45°. In its distal region, the axial stopper 20 extends radially R and, in some cases, parallel to the axial stopper 18.

[0046] In the longitudinal direction L between the two axial stoppers 18 and 20, the elastomer body 8 has a circumferential projection 16 on its outer circumference that protrudes radially R outward. In the unloaded state shown in Figures 2 and 3, the circumferential projection 16 can be seen to have a square or trapezoidal longitudinal section, or a nearly square or trapezoidal longitudinal section. The corners of the longitudinal section can be rounded for manufacturing reasons. In its distal region, the circumferential projection 16 extends radially R, originating from the second leg portion 30, and possibly parallel to the axial stopper 18. The circumferential projection 16 is integral with the elastomer body 8 and is made of the same material.

[0047] To be fixed to the first component 100, the elastomer body 8 has an outer circumferential groove 10. The groove 10 is an outer circumferential groove and has a rectangular longitudinal cross-section. Furthermore, the groove 10 has a groove bottom 12 and two adjacent groove walls 14, which are formed on one side by an axial stopper 18 and on the other side by a circumferential projection 16. Thus, a three-sided groove is formed.

[0048] Inner sleeve 4 It extends significantly longer in the longitudinal direction than the elastomer body 8. (Inner sleeve) 4 The outer perimeter is completely covered with elastomer, which is partly due to the manufacturing process. Therefore, the inner sleeve 4 In this case, only an elastomer skin 36 that does not have the function of the elastomer body 8 is provided in one end region.

[0049] To avoid repetition, only the differences between Figure 3 and Figure 2 will be explained below. In the damping device shown in Figure 2, the axial stopper 20 is integrally formed from the same material as the elastomer body 8, whereas the second axial stopper 20 is adjacent to the elastomer body 8 and has an inner sleeve. 4 It is attached to the adjacent axial stopper 20 and the elastomer body 8, with an elastomer skin 36 as an inner sleeve. 4 The elastomer skin present on top is a by-product of the manufacturing process and does not function relative to the elastomer body 8 and the adjacent axial stopper 20. In this embodiment, the adjacent axial stopper 20 can be used as a damper for high-frequency vibrations. The adjacent axial stopper 20 has an inner sleeve in the radial direction R. 4 It protrudes outward at a right angle.

[0050] Figure 4 shows the assembly 1 equipped with the damping device 2 according to Figures 1 and 2, and in principle, the damping device 2 according to Figure 3 can also be used here.

[0051] In addition to the damping device 2, the assembly 1 includes a first component 100 which can serve as a frame. The first component 100 has an opening 102 designed as a through-hole, through which the damping device 2 can be connected to the respective components 200 and 300 on either side of the through-hole. The opening 102 has an inner circumferential surface 104, and the central longitudinal axis A passes through its center. The damping device 2 is inserted or press-fitted into this opening 102 in the insertion direction E. Thus, in the assembled state, a press-fit is formed between the damping device 2 and the opening 102.

[0052] During assembly, the axial stopper 20 is inserted into the opening 102 in the insertion direction E and guided through the opening 102. After passing through the opening 102, or after being inserted sufficiently deep into the opening 102, the axial stopper 20 snaps away to the illustrated terminal position and comes to rest on the first part 100.

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

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

[0055] The groove 10 and the circumferential projection 16 each have an outer circular cross-sectional shape, while the circumferential flange 106 and the mounting portion 108 of the opening 102 each have an inner circular cross-sectional shape.

[0056] In the assembled state, the center line 32 can be seen to extend so as to radially overlap with the circumferential flange 106 in the region of the fold 26, or at least in contact with the projection of the circumferential flange in the direction of the central longitudinal axis A. The center line 32 is also present in the region of the first leg portion 28, but is not shown purely for illustrative purposes.

[0057] Other parts 200, 300 are connected to the damping device 2 and are, 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. Parts 200, 300 each have stop surfaces 202, 302 which are positioned axially adjacent to the corresponding axial stoppers 18, 20. The fastening member 400 passes through the third part 300 and the inner sleeve 4 and securely 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 surface 112, and the first longitudinal contact length L1 indicates 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 elastomer body 8 in the region surrounding the circumferential flange 106 corresponds at least partially to at least the first longitudinal contact length L1, thereby, in this embodiment, this applies to the region of the elastomer body 8 on the inner circumference side of the circumferential flange 106 and the axial stopper 18 that contacts the circumferential flange 106.

[0059] 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 mounting portion 108. The second longitudinal contact length L2 indicates the distance at which the elastomer body 8 and the part 100 are in contact with each other in the region outside the circumferential flange 106 or in the region of the mounting portion 108. The second longitudinal contact length L2 can be at least 1.5 mm. In the region 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 of the second longitudinal contact length L2 to the first longitudinal contact length L1 can 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 stopper 20 and the stopping surface 202. The (first) longitudinal distance L3 represents the distance that the axial stopper 20 and the stopping surface 202 can move relative to each other until they abut each other and the axial stopper 20 buffers the abutment of the second part 200.

[0061] A (second) longitudinal distance L4 extending in the longitudinal direction L may exist between the axial stopper 18 and the stopping surface 302. The (second) longitudinal distance L4 represents the distance that the axial stopper 18 and the stopping surface 302 can move relative to each other until they abut each other and the axial stopper 18 buffers the abutment of the third component 300.

[0062] The (third) longitudinal distance L5 extending in the longitudinal direction L may exist between the fold 26 and the circumferential flange 106 and can be at least 2 mm. The (third) longitudinal distance L5 represents the distance between the surface facing the fold 26 or its circumferential flange on one side and the contact surface facing the circumferential flange 106 or its fold on the other side.

[0063] Let L6 be the longitudinal length of the opening 102. 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.

[0064] The first diameter D1 is formed by the circumferential flange 106, which indicates the distinct width of the opening 102 in the region of the circumferential flange 106. The ratio of the diameter of the elastomer body 8 in the groove bottom 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.

[0065] The second diameter D2 is formed by the mounting portion 108 and indicates the distinct width of the opening 102 in the region of the mounting portion 108, which is also the maximum diameter of the opening 102 as shown in the illustrated embodiment. In the unloaded state of the elastomer body 8, the ratio of the diameter of the elastomer body 8 in the portion 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 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. Let this overlap distance be the (first) overlap distance D3. The (first) longitudinal distance L3 can be smaller than this (first) overlap distance D3.

[0067] The axial stopper 18 also contacts the front surface of the first part 100. Let this overlap distance be the (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 any one of the embodiments described above, but can instead be modified in many different ways. All features and advantages evident from the claims, detailed description, and drawings, including structural details, spatial arrangements, and method steps, may be essential to the present invention, both individually and in a wide variety of combinations.

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

[0070] To avoid repetition, features disclosed in connection with an apparatus may also be considered and claimed to be disclosed in connection with a method. Similarly, features disclosed in connection with a method may also be considered and claimed to be disclosed in connection with an apparatus. [Explanation of Symbols]

[0071] 1 assembly 2. Damping device 4. Inner sleeve 6 holes 8 Elastomer 10 grooves 12 Groove bottom 14. Ditch wall 16 Circumferential projections 18 Axial stopper 20 Axial stopper 22 mounting slots 24 connection points 26 folds 28 First leg 30 Second leg 32 Center line 34 Center line 36 Elastomer Leather 38 Mounting corner 100 Part 1 102 Opening 104 Inner peripheral surface 106 Circumferential flange 108 Mounting part 110 Contact surface 112 Inner surface 200 Other (Second) Parts 202 Stopping surface 204 screws 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 outline L Longitudinal direction 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) having an opening (102) with an inner circumferential surface (104), It comprises a damping device (2) through which the central longitudinal axis (A) passes, The damping device (2) An inner sleeve (4) having a hole (6) is designed to fix the damping device (2) to other parts (200, 300), The damping device (2) is fixed to the first component (100) by an elastomer body (8), the elastomer body (8) surrounding the outer circumference of the inner sleeve (4) and supported in a manner that applies preload to the inner circumferential surface (104), The damping device (2) is designed without an outer sleeve, The damping device (2) has two axial stoppers (18, 20) that protrude radially outward, and these axial stoppers (18, 20) are arranged at both ends of the damping device (2) in the direction of the central longitudinal axis (A). The elastomer body (8) has a U-shape when viewed in a longitudinal section. An assembly in which at least one of the axial stoppers (18, 20) is positioned on the U-shaped fold (26) of the elastomer body (8), or adjacent to the fold (26) when viewed in the longitudinal direction (L).

2. The opening (102) has a circumferential flange (106) that protrudes radially inward, The elastomer body (8) has a circumferential groove (10), The assembly according to claim 1, wherein the circumferential flange (106) is fitted into the circumferential groove (10), and preferably, the first longitudinal contact length (L1) is formed along the groove bottom (12) and the circumferential flange (106).

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

03.

4. The assembly according to claim 3, wherein, in an unloaded state of the elastomer body (8), the ratio of the diameter of the elastomer body (8) in the portion designed to contact the inner circumferential surface (104), particularly in the region of the second longitudinal contact length (L2), to the second diameter (D2) of the opening (102) or the maximum diameter of the opening (102) is greater than 1.

03.

5. The assembly according to claim 4, wherein the difference between the second diameter (D2) and the first diameter (D1) is greater than 5 mm.

6. The circumferential groove (10) and / or circumferential projection (16) have a circular, elliptical, oblong, or elongated outer contour in cross-section. The assembly according to claim 2, wherein the circumferential flange (106) and / or the inner circumferential surface (104) and / or the mounting portion (108) have an inner circumferential contour with a circular cross-section.

7. The assembly according to claim 1, wherein one of the axial stoppers (18, 20) or at least one of the axial stoppers (18, 20) has mounting slots (22) that extend radially (R) and are preferably equidistant from each other with respect to the central longitudinal axis (A).

8. The assembly according to claim 1, which is connectable to the damping device (2), and preferably comprises one axial stopper (18, 20) or another part (200, 300) having a stopping surface (202, 302) axially adjacent to one of the axial stoppers (18, 20), wherein the longitudinal distance (L3, L4) between the axial stopper (18, 20) and the stopping surface (202, 302) is less than or equal to the overlap distance (D3, D4) between the axial stopper (18, 20) and the first part (100).

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