Elastic support

Abstract

The invention relates to an elastic support, comprising a main body (4) having at least one fastening hole (6) for a fastening sleeve (8), wherein the fastening hole (6) is penetrated by a central longitudinal axis (Z), and at least one fastening sleeve (8), wherein the fastening sleeve has a flange portion (10) extending in a radial direction (R) and a rod portion (12) extending in a longitudinal direction (L), wherein the fastening sleeve (8) is fixed in the fastening hole (6), and an elastomer (14) which is arranged on a surface of the elastic body. The invention relates to a fastening hole (6) having an elastomer (14) and a main body (4) disposed on the outer peripheral side of the fastening sleeve (8), wherein the elastomer (14) has an enlarged diameter profile (16) in the region of the shaft portion (12), the diameter of which increases as the longitudinal distance from the flange portion (10) increases, and the fastening hole (6) has an enlarged diameter profile (18) that is enlarged to the same extent as the enlarged diameter profile (16) of the elastomer (14), wherein the elastomer (14) is preloaded at least in the radial direction (R) by the main body (4) and the fastening sleeve (8).

Description

Technical Field

[0001] The present invention relates to an elastic support (Lager). Background Art

[0002] From practice, elastic supports are known which can include a main body, such as a vibration-damping body, and a clamping sleeve inserted into a fastening hole of the main body. A vibrating device can be connected to the sleeve (damping function) and / or a device which is to be isolated from vibration can be connected to the sleeve (separation function). An elastomer layer is arranged between the main body and the clamping sleeve. As an anti-loss mechanism, in automobile construction, for example, a side bite between the main body and the clamping sleeve is usually achieved by a radial flange portion of the sleeve, the sleeve having a diameter greater than the fastening hole. Common clamping sleeves include a cylindrical section, which can carry a cylindrical elastomer, whereby a radial overlap between the elastomer layer and the fastening hole is caused with sufficient friction for a cylindrical press fit.

[0003] Due to the large operating vibration clearances and some high-amplitude vibration events associated with the corresponding relative movement between the main body and the clamping sleeve, combined with possibly higher temperatures, the friction at the elastomer layer does not prevent axial outward movement of the main body in particular. The prestressing of the elastomer layer can also cause axial outward movement of the main body over a long period of time. After the main body can still move axially relative to the clamping sleeve, a hard stop with the device may occur, or a complete locking of the main body may occur, with the result that no damping or separation effect can occur. In addition, axial slip cannot be excluded or reliably prevented by universal abandonment. Summary of the invention

[0004] The object of the present invention is therefore to provide a spring-loaded mounting which allows a more permanent and more process-reliable fixation of the clamping sleeve over the entire service life.

[0005] According to the present invention, an elastic support is proposed, which includes a main body (Masse), the main body has at least one fastening hole for a fastening sleeve, wherein the fastening hole is penetrated by a central longitudinal axis, and also includes at least one fastening sleeve, the fastening sleeve has a flange portion extending in the radial direction and a shaft portion extending in the longitudinal direction, wherein the fastening sleeve is fixed in the fastening hole, and includes an elastomer, which is arranged on the outer circumference of the fastening sleeve, wherein the elastomer has a diameter expansion profile in the shaft region, and its diameter increases with increasing longitudinal distance from the flange portion, and the fastening hole has a diameter expansion profile that expands to the same extent as the diameter expansion profile of the elastomer, wherein the elastomer is prestressed at least in the radial direction by the main body and the fastening sleeve.

[0006] By means of the enlarged diameter profile of the elastomer, the axial outward movement of the clamping sleeve in two axial directions can now be reliably prevented. The elastomer, which can be designed as a truncated cone at least in the shank region, has a radial overlap with the inner profile of the clamping hole. When an axial force acts, a "normal force" appears in the friction surface relative to the elastomer and / or the main body depending on the arrangement of the elastomer, which prevents accidental movement. In addition, the enlarged diameter profile of the elastomer causes the clamping sleeve to return to the initial position even in large-amplitude vibration events, because the normal component is greater than that of a simple cylindrical press fit due to the tilting of the enlarged diameter. In addition to the higher normal component, a typical form fit can also occur at the larger diameter of the enlarged diameter. It is conceivable that the larger diameter of the profile is located on the screwing side, i.e., on the side where a fastener or screw can be screwed in so that it can be threadedly connected to a device there. The device to be isolated from it can be, for example, a vehicle body. The elastic support can be, for example, a shock absorber, a rubber support or a support bushing. The main body can be, for example, a damping body or an auxiliary / secondary device or a fastening member.

[0007] The maximum outer diameter of the enlarged diameter profile of the elastomer is greater than the minimum inner diameter of the fastening hole through which the clamping sleeve is to be inserted. As a result, the elastomer has a radial overlap with the inner profile of the body. Advantageously, the elastomer can therefore be squeezed open during installation when the clamping sleeve is inserted into the fastening hole. After installation, the elastomer is supported due to the high rigidity of the body and / or the clamping sleeve.

[0008] The enlarged diameter contours of the fastening opening and of the fastening sleeve can extend parallel to one another when viewed in longitudinal section.

[0009] According to a conceivable improvement of the support according to the invention, the elastomer layer can be carried by the body or the clamping sleeve or vulcanized there. The vulcanization design improves the manufacturing process in that the entire body does not have to be placed in the mold during vulcanization, which saves a lot of space in the mold and saves energy that would otherwise be required to heat the body. Alternatively, the elastomer layer can be a separate component that rests only against the body and the sleeve in a force-fitting and / or form-fitting manner.

[0010] According to a further development of the support according to the invention, the clamping sleeve can have a diameter expansion profile in the shank region which is expanded to the same extent as the diameter expansion profile of the elastomer. By means of the mounting at the rear, squeezing out of the elastomer after mounting is better prevented, since the clamping sleeve cannot be compressed and does not provide any clearance for the elastomer.

[0011] According to an improved embodiment of the support according to the invention, the elastomer can have a flange area, which is supported by the flange part and abuts against a step in the fastening hole. The elastomer thus has at least two sections, namely a clamping area in the shank area of ​​the fastening sleeve with a diameter-enlarged profile, and an axially acting flange area. The flange area can be over-pressed and temporarily compressed during installation, but here, the flange area pulls the fastening sleeve into the installation position after the pressure is discharged. In order to increase the axial rigidity or universal rigidity (with respect to the axial frequency / rocking frequency), an elastomer layer can also be arranged in the annular gap between the flange part of the fastening sleeve and the radially opposite main body surface, which is preferably integral with the elastomer.

[0012] According to an improved embodiment of the support according to the invention, the diameter expansion profile of the elastomer and the flange area can be designed to preload the elastomer in the axial direction. For example, by appropriately selecting the geometry and / or arrangement of the diameter expansion profile of the elastomer and the flange area, both are preloaded in the equilibrium position. This results in mutually opposing forces acting on the clamping sleeve.

[0013] According to an improved solution of the support of the present invention, the elastomer can have a cavity area, which is carried by the rod and forms a cavity together with the fastening hole. The cavity area can be arranged axially between the flange area and the clamping area, preferably at least in close proximity with respect to the clamping area. The outer diameter of the cavity area of ​​the elastomer can be smaller than the inner diameter of the radially opposite inner surface of the fastening hole. The cavity area is used for simple installation, because the elastomer that is squeezed open due to excessive compression can be pressed into the cavity area and thus avoided. The cavity area can include an annular groove, which has an enlarged contour relative to the diameter of the elastomer or is at least radially retracted relative to the adjacent section.

[0014] According to an improved solution of the support of the present invention, the clamping sleeve can have a radially extending support portion, which can be arranged in the vicinity of the maximum diameter of the diameter-enlarged profile of the elastomer. It is also conceivable that there is an axial gap between the support portion and the maximum diameter of the diameter-enlarged profile of the elastomer. In order to strengthen the clamping effect, the clamping sleeve can have an additional support portion, which does not have to be bonded to or supported on the elastomer. However, if there is an axial gap, with or without bonding between the elastomer and the inner sleeve, the elastomer can be slightly deformed relative to the support portion and thus make it easier to insert into the fastening hole. In the event of possible disassembly, the elastomer can be firmly supported on the support portion. The support portion can have an outer diameter that is smaller than the minimum inner diameter of the fastening hole, so that the sleeve can be easily installed.

[0015] According to a further development of the bearing according to the invention, the enlarged diameter profile of the elastic body can be designed as a frustoconical profile or as a partial oval profile, thereby making it possible to influence the bearing behavior.

[0016] According to a further development of the support according to the invention, the clamping sleeve can have a central through hole, through which the fastening element and in particular the screw can pass toward the screwing side. Preferably, the central through hole is designed without an internal thread.

[0017] According to an improved embodiment of the support according to the invention, the elastomer and / or the fastening hole can have an introduction bevel for the respective other component. The at least one introduction bevel is inclined relative to the cross section. As a result, the installation is significantly simplified, because the deformation direction of the elastomer is preset, and the elastomer or the fastening sleeve and the fastening hole can be centered at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Further features, details and advantages of the invention emerge from the wording of the claims and from the following description of exemplary embodiments in conjunction with the figures, in which:

[0019] Figure 1a A longitudinal section view shows the pre-installed position of the clamping sleeve of the present invention in a first embodiment;

[0020] Figure 1b Show according to Figure 1a The installation position of the fastening sleeve; and

[0021] Figure 2 A second embodiment of the clamping sleeve according to the invention is shown in longitudinal section.

[0022] Reference numerals list

[0023] 2 Support

[0024] 3 Shock absorber

[0025] 4 Main Body

[0026] 5. Vibration reduction body

[0027] 6 Fastening holes

[0028] 8 Fastening sleeve

[0029] 9 Matrix

[0030] 10 Flange

[0031] 12 Rod

[0032] 14 Elastomer

[0033] 16. Outline

[0034] 18. Outline

[0035] 20 Outline

[0036] 22 Center through hole

[0037] 24 Flange area

[0038] 26 Cavity area

[0039] 28 Clamping area

[0040] 30 steps

[0041] 32 Cavity

[0042] 34 Supporting part

[0043] 36 Axial clearance

[0044] 38 Lead-in bevel

[0045] 40 Lead-in bevel

[0046] 42 Screw side

[0047] 44 Annular gap

[0048] 46 Coverage

[0049] 48 Annular groove

[0050] A Axial

[0051] E Screw-in direction

[0052] L Vertical

[0053] R Radial

[0054] Z Center longitudinal axis DETAILED DESCRIPTION

[0055] In the figures, identical or mutually corresponding parts are respectively marked with the same reference numerals, so they will not be described again unless it is inappropriate. Features that have already been described will not be described again to avoid repetition and can be applied to parts with the same reference numerals or reference numerals corresponding to each other, unless explicitly excluded. The disclosure contained in all descriptions can be transferred to the same parts with the same reference numerals or the same component names according to the meaning. The position descriptions selected in the specification, such as top, bottom, lateral, etc., can also refer to the figures immediately described and shown and be transferred to the new position according to the meaning when the position changes. In addition, independent features or feature combinations from the different embodiments shown and described can also be independent, creative or solutions according to the present invention.

[0056] Figure 1a and Figure 1b A half side view of the same elastic bearing 2 is shown, which is shown in the form of a vibration damper 3 . Figure 1a The pre-installed position is shown, in which the fastening sleeve 8 has not yet been placed in the fastening hole 6. Figure 1bThe illustrated installation position is in which the mounting has already taken place in the screwing direction E. The reference numerals can therefore be transferred to the respective other figures.

[0057] The support 2 includes a main body 4, which is shown as a vibration-damping main body 5. The main body 4 includes at least one continuously formed fastening hole 6. The fastening hole 6 is passed through by the central longitudinal axis Z in the axial direction A or in the longitudinal direction L. The fastening hole 6 has a profile 18 on the inner peripheral side. The support 2 also includes at least one fastening sleeve 8, which includes a base body 9, which has a flange portion 10 extending in the radial direction R and a rod portion 12 extending in the longitudinal direction L. The fastening hole 6 and / or the fastening sleeve 8 can be designed to be rotationally symmetrical about the central longitudinal axis Z. The fastening sleeve 8 has a central through hole 22 extending along the central longitudinal axis Z, and a fastener, especially a screw, can pass through the central through hole 22 in the screwing direction E until the screwing side 42 and be tightened on a device there. An elastomer 14 that can also be vulcanized on the fastening sleeve 8 is provided on the outer peripheral side of the fastening sleeve 8. The elastomer 14 has a profile 16 on the outer peripheral side. The elastomer 14 can be designed to be rotationally symmetrical about the central longitudinal axis Z.

[0058] The longitudinal cross-sectional profiles of the contour 18 of the fastening hole 6 and the contour 16 of the fastening sleeve 8 are matched to each other in such a way that, in the installed position, they reliably prevent the fastening sleeve 8 from axially moving outward at least in the axial direction A. For this purpose, the contour 16 of the elastomer 14 is designed as an enlarged diameter at least in the region of the shank 12, wherein its diameter increases with increasing longitudinal distance from the flange 10. In addition, the fastening sleeve 8 has an enlarged diameter contour 20 in the region of the shank 12, which is enlarged to the same extent as the enlarged diameter contour 16 of the elastomer 14 for installation therebehind. In longitudinal cross-section, the contours 16 and 20 extend in parallel.

[0059] Therefore, the elastomer 14 has at least partially the shape of a truncated cone, wherein the larger diameter of the contour 16 is located on the screw side 42. The enlarged diameter contour 16 of the elastomer 14 is carried by the clamping area 28 in the region of the shank 12 of the clamping sleeve 8. The elastomer 14 also has two other sections, namely the flange area 24 carried by the flange part 10 and abutting against the step 30 in the fastening hole 6 in the installed position, and the cavity area 26 carried by the shank 12 and forming the cavity 32 with the fastening hole 6. In order to form the cavity area 26, the elastomer 14 has an annular groove 48, which is set back inwards in the radial direction R relative to the enlarged diameter contour 16. In the annular gap 44 between the flange part 10 of the clamping sleeve 8 and the radially R opposite surfaces of the main body 4, an elastomer layer can also be arranged.

[0060] The contour 18 of the fastening hole 6 is designed at least in sections to increase the diameter. The contour 18 is enlarged to the same extent as the enlarged diameter contour 16 of the elastomer 14. The enlarged diameter contour 16 of the elastomer 14 and its flange area 24 are dimensioned in relation to the fastening hole 6 such that the elastomer 14 is preloaded in the axial direction A and in the radial direction R. In the installed position, the enlarged diameter contour 16 and the flange area 24 are arranged in a balanced position under preload.

[0061] exist Figure 1a It can be seen that the elastomer 14 has a radial cover 46 relative to the contour 18 of the fastening hole 6 at least at the position of its maximum diameter. Therefore, the elastomer 14 can be pressed out of its unstressed state when the fastening sleeve 8 is installed in the fastening hole 6, preferably at least partially pressed into the cavity 32 or the annular groove 48 formed there. If the fastening sleeve 8 is completely inserted into the fastening hole 6, it is over-compressed in the screw-in direction E at the end of the installation. Here, the flange area 24 is compressed and the clamping area 28 is clamped forward or toward the screwing side 42. The flange area 24 then overcomes its compression and pulls the sleeve 8 into the hole 6 a certain distance in the opposite direction of the screw-in direction E. Subsequently, both the flange area 24 and the clamping area 28 are pre-tensioned and installed in the equilibrium position. In the direction opposite to the screw-in direction E, it cannot be moved back or axially outward due to the cover 46, wherein this effect is reinforced by the installation with the help of the contour 20.

[0062] In order to facilitate installation, a plurality of introduction bevels 38, 40 may be provided, wherein the introduction bevel 38 is provided on the end side of the elastic body 14, and the introduction bevel 40 in the fastening hole 6 is only provided on the end side of the elastic body 14. Figure 1a The introduction bevels 38, 40 are inclined relative to the cross section and taper toward the screw side 42. The longitudinal sections of the introduction bevels 38, 40 can be designed to be parallel to each other, but it is also advantageously conceivable that the introduction bevel 40 of the fastening hole 6 is more inclined or encloses a larger angle with the cross section.

[0063] Figure 2 The fastening sleeve 8 according to the invention is also shown, but now in an independent state. In order to avoid repetition, only the fastening sleeve 8 according to the invention shall be described below. Figure 1a and Figure 1b The difference between the fastening sleeve 8.

[0064] The clamping sleeve 8 has a support portion 34 extending in the radial direction R, which is formed on the side opposite to the flange portion 10. The support portion 34 is arranged near the maximum diameter of the diameter-enlarged profile 16 of the elastomer 14, but it is not necessarily designed in this way. An axial gap 36 is formed between the support portion 34 and the elastomer 14, and its longitudinal section is designed to be wedge-shaped. However, there is not necessarily such an axial gap 36. The elastomer 14 can also be supported by the support portion 34 or vulcanized there. The outer diameter of the support portion 34 is smaller than the minimum inner diameter of the clamping hole 8.

[0065] The invention is not limited to one of the above-described embodiments, but can be varied in many ways. All features and advantages from the claims, the description and the figures, including structural details, spatial arrangements and method steps, can be important to the invention both individually and in various combinations.

[0066] All combinations of at least two features disclosed in the description, the claims and / or the figures fall within the scope of the invention.

[0067] In order to avoid repetition, features disclosed in relation to the device should also be considered disclosed and claimable in relation to the method. Features disclosed in relation to the method should also be considered disclosed and claimable in relation to the device.

Claims

1. An elastic support, comprising a main body (4), the main body (4) having at least one fastening hole (6) for a fastening sleeve (8), wherein: The fastening hole (6) is penetrated by a central longitudinal axis (Z), and the elastic support further comprises at least one fastening sleeve (8), wherein the at least one fastening sleeve (8) has a flange portion (10) extending in a radial direction (R) and a rod portion (12) extending in a longitudinal direction (L), wherein the at least one fastening sleeve (8) is fixed in the fastening hole (6), and the elastic support further comprises an elastomer (14), which is arranged on the outer peripheral side of the fastening sleeve (8), characterized in that the elastomer (14) has a diameter expansion profile (16) in the region of the rod portion (12), and the diameter of the diameter expansion profile (16) increases as the distance from the flange portion ( 10), and the fastening hole (6) has a diameter expansion contour (18) that is expanded to the same extent as the diameter expansion contour (16) of the elastomer (14), wherein the elastomer (14) is prestressed at least in the radial direction (R) by the main body (4) and the fastening sleeve (8), wherein the elastomer (14) has a flange area (24), which abuts against a step (30) in the fastening hole (6), wherein the flange area (24) can be overstressed and temporarily compressed during installation, but the flange area pulls the fastening sleeve into the installation position after the pressure is released.

2. The elastic support according to claim 1, characterized in that: The clamping sleeve (8) has, in the region of the shaft (12), an expanded diameter contour (20) which is expanded to the same extent as the expanded diameter contour (16) of the elastomer (14).

3. The elastic support according to any one of the preceding claims, characterized in that The flange area (24) is carried by the flange portion (10).

4. The elastic support according to claim 3, characterized in that: The enlarged diameter contour (16) and the flange region (24) preload the elastomer body (14) in the axial direction (A).

5. The elastic support according to claim 1, characterized in that: The elastic body (14) has a cavity portion (26) which is carried by the rod portion (12) and forms a cavity (32) together with the fastening hole (6).

6. The elastic support according to claim 1, characterized in that: The clamping sleeve (8) has a support portion (34) extending in the radial direction (R), and the support portion is arranged near the maximum diameter of the enlarged diameter profile (16) of the elastomer (14).

7. The elastic support according to claim 1, characterized in that: The enlarged diameter profile (16) of the elastic body (14) is designed as a frustoconical profile or a partial oval profile.

8. The elastic support according to claim 1, characterized in that: The fastening sleeve (8) has a central through hole (22), and a fastener can pass through the central through hole (22) toward the tightening side.

9. The elastic support according to claim 1, characterized in that: The elastomer body (14) and / or the fastening hole (6) have an insertion bevel (38, 40) for the respective other component.

10. The elastic support according to claim 8, characterized in that: The clamping sleeve (8) has a central through hole (22), through which a screw can pass toward the tightening side.

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