DE102013201064A1 - Vibration absorber for use in stand for acoustic decoupling of phonographic apparatus from environment, has projections and interstices formed for positive stacking of one absorber element with another absorber element - Google Patents

Abstract

The absorber (1) has three absorber elements (2, 5) whose front ends (3, 6) comprise coupling- and contact regions (4, 7) with three-dimensionally formed surface contours with projections (33) and interstices at a front end (3). One of the surface contours corresponds to the other surface contour. The projections and the interstices are formed for positive stacking of one of the absorber elements with the other absorber element. The projections of coupling- and contact regions are protruded in a stacking direction. The projections comprise a sinusoidal shaft contour along a ring. The absorber elements are made of thermoplastic elastomer e.g. thermoplastic polyurethane or silicone, timber, plastic, metal and/or a metal alloy. Independent claims are also included for the following: (1) a stand for acoustic decoupling of a phonographic apparatus from environment (2) a decoupling device for acoustic decoupling of a phonographic apparatus from environment (3) an oscillating mechanical system.

Description

FIELD OF THE INVENTION

The present invention relates to a vibration absorber, a decoupling device with such a vibration absorber and a vibrating mechanical system with such a vibration absorber or with such a decoupling device.

TECHNICAL BACKGROUND

In mechanical systems, natural frequencies exist, in which a system easily springs up when excited externally. Such suggestions can be of very different nature and have many different causes. In order to avoid larger vibration amplitudes, vibration absorbers are used in a wide variety of technical fields. For example, vibration absorbers in the field of phonotechnics have a special significance. The functional principle of a vibration absorber is always to convert the energy of the vibrations into heat by internal friction of the material structure and thus to dampen the decay behavior of a system when vibrations occur.

In electric phono devices, all electronic components and all mechanical components, in particular the housing, form mechanical systems with natural frequencies. In such devices, transformers are often used for voltage conversion, which usually disturbing vibrations, especially in the range of the grid frequency, stimulate. Furthermore, such systems are often also excited by the sound emission associated, usually located in the same room befindlicher speakers. In addition, suggestions from outside, z. B. by impact sound on. With such suggestions resonances, i. H. the coincidence of the frequency of an excitation with a resonant frequency occur. The resulting vibrations degrade the sound quality of phono devices.

Another problem with phonograms in combination with vibrations is microphonics. This is understood as the property of electronic components to react to mechanical stimulation by changing their electrical parameters. This also affects the sound quality.

In phonetic technology, therefore, vibration absorbers are used to detect phonographic devices from their surroundings, i. H. usually from their footprint, decoupled, for example, to increase the sound quality of a record player. Simple vibration absorbers are often designed as rubber feet. High quality vibration absorbers are provided as, for example, as composite feet or as absorber plates.

All of these previous solutions are either very complex and expensive to produce and / or dampen vibrations not over a sufficiently wide frequency band.

This is a condition to be improved.

SUMMARY OF THE INVENTION

Against this background, the present invention has the object to provide an improved vibration absorber.

According to the invention this object is achieved by a vibration absorber having the features of patent claim 1 and a decoupling device having the features of claim 17 and a vibratory mechanical system having the features of claim 19.

• – Ein Schwingungsabsorber, insbesondere zur akustischen Entkopplung eines Phonogeräts von seiner Umgebung, mit einem ersten Absorberelement, welches an zumindest einer Stirnseite einen ersten Koppel- und Kontaktbereich mit einer dreidimensional geformten ersten Oberflächenkontur aufweist, mit einem zweiten Absorberelement, welches an zumindest einer Stirnseite einen zweiten dreidimensionalen Koppel- und Kontaktbereich mit einer dreidimensional geformten, zur ersten Oberflächenkontur korrespondierenden, zweiten Oberflächenkontur aufweist, wobei der erste und der zweite Koppel- und Kontaktbereich derart vorgesehen und ausgelegt sind, dass das erste Absorberelement mit dem zweiten Absorberelement formschlüssig stapelbar ist.
• – Eine Entkopplungsvorrichtung, insbesondere zur akustischen Entkopplung eines Phonogeräts von seiner Umgebung, mit zumindest einer Platte, zumindest einem Gerätegehäuse und zumindest einem Schwingungsabsorber gemäß einem der vorstehenden Ansprüche, wobei die Platte und der Schwingungsabsorber zwischen dem Gerätegehäuse und einer Umgebung des Gerätegehäuses angeordnet sind.
• – Ein schwingfähiges mechanisches System, insbesondere Gerät mit einem Gehäuse, gedämpft durch einen erfindungsgemäßen Schwingungsabsorber oder durch eine erfindungsgemäße Entkopplungsvorrichtung.

Accordingly, it is provided:

• A vibration absorber, in particular for the acoustic decoupling of a phono device from its surroundings, having a first absorber element which has on at least one end face a first coupling and contact region with a three-dimensionally shaped first surface contour, with a second absorber element which has a second absorber element on at least one end side three-dimensional coupling and contact region having a three-dimensionally shaped, corresponding to the first surface contour, the second surface contour, wherein the first and the second coupling and contact area are provided and designed such that the first absorber element with the second absorber element is positively stackable.
• A decoupling device, in particular for the acoustic decoupling of a phono device from its surroundings, comprising at least one plate, at least one device housing and at least one vibration absorber according to one of the preceding claims, wherein the plate and the vibration absorber are arranged between the device housing and an environment of the device housing.
• - An oscillatory mechanical system, in particular device with a housing, damped by a vibration absorber according to the invention or by a decoupling device according to the invention.

An idea underlying the present invention is to prevent vibrations in absorb a vibration absorber simultaneously with internal friction within a material and with external friction between different elements or materials. In addition to absorption by internal friction thus absorption by friction of several absorber elements takes place with each other at their contact surfaces.

The contact surfaces are provided by the three-dimensional design of the surface contour of the coupling and contact areas preferably in different spatial levels, so that a three-dimensional nesting of the contact surfaces is formed. Thus, surface friction can arise in different directions and an effective damping or absorption of vibrations in different directions is achieved.

A further idea on which the invention is based is to provide absorber elements of modular design, in particular with a uniform three-dimensional surface contour and / or three-dimensionally form-fitting, with a large contact surface stackable with one another. With such a design, as required, different absorber elements, in particular of different materials, can be modularly combined to absorb vibrations in different frequency ranges or over a very wide frequency range in the stack. No additional connection technology is necessary. In particular, absorber elements of materials of different hardness can be stacked modularly simple and stable on each other.

Thus, a due to the preferred uniform geometry of the absorber elements very easily variable, different usable vibration absorber is created, which absorbs by an intimate connection between absorber elements, depending on the choice of the material of the absorber elements, vibrations of different frequency ranges.

Furthermore, a vibration absorber is provided which can be tuned or designed with very little effort by the selection or the different combination of the materials of the absorber elements. For example, individual tuning of phono equipment is very easily possible because the absorber elements are easily interchangeable individually with another absorber element.

In addition, a vibration absorption is additionally provided by external friction of the absorber elements with each other by the large contact surface. In particular, different surface contours may also be provided at different contact or coupling regions in the design in order to influence or design the damping characteristic.

For decoupling a phono unit from its surroundings, the oscillation absorber according to the invention can be provided, for example, directly on the phono unit as a housing base or as a base for feet.

Alternatively or additionally, the vibration absorber according to the invention can also be used in a decoupling device. A decoupling device can be constructed, for example, such that one or more vibration absorbers are inserted between two plates, wherein a lower plate is located on an ambient background and the upper plate serves as a base for the phono unit. The plates are for example made of plexiglass, slate, MDF (medium-density fiber), multiplex or other rigid material. The plate material preferably has a higher hardness than the absorber elements and / or a high chemical resistance. In one embodiment, the plate material may have different shore hardnesses. Furthermore, in one embodiment, only one plate above or below the or the vibration absorber may be provided. For this purpose, either the housing can rest directly on the vibration absorber or the vibration absorber stand directly on an underground environment.

Advantageous embodiments and further developments will become apparent from the other dependent claims and from the description with reference to the figures of the drawing.

In an advantageous embodiment, the first and the second three-dimensional surface contour are of the same design, such that the first and second absorber elements can be stacked with one another in a form-fitting manner by a radial offset. Alternatively or additionally, the offset may also be lateral. Thus, the first and second absorber elements can be provided with a uniform geometry. This is particularly advantageous if different absorber elements are to be combined with one another as required, for example if the absorber elements have different materials or different properties. In order to produce a form-fitting stack, these need advantageously only be offset from each other. Thus, no tool or connecting element or the like is necessary to stack the absorber elements in a form-fitting manner. Furthermore, advantageously adapted to the individual application as required, different absorber elements can be easily stacked with one another without regard to stackability and offer good stability in the stack.

In a preferred embodiment, at least one third absorber element is provided which has a third coupling and contact region with a three-dimensionally shaped third surface contour on at least one end face. The third coupling and contact region is provided and designed such that the third absorber element with the first and second absorber element is positively stackable. As a result, advantageously at least three different absorber elements can be stacked together in a form-fitting manner. For a vibration absorber, this means that three different damper materials can be used, whereby the damped vibration frequency band is wider adjustable.

In a further embodiment, the first, second or third absorber element, or a combination of the absorber elements contains at least one thermoplastic elastomer, in particular thermoplastic polyurethane or silicone, wood, a metal or a metal alloy, or a combination of such materials. Furthermore, composite materials can also be used. Various types of material, for example different woods or preferably different thermoplastic elastomers may also be used. Thus, advantageously different materials for the individual or for a plurality of absorber elements can be used, which can be selected depending on the requirements of the damping characteristic of the absorber elements.

According to a further advantageous embodiment, the first, second or third absorber element, or a combination of the absorber elements, contains a plastic having a Shore A hardness of 20-80, in particular of 30-60. Preferably, the plastic is a thermoplastic elastomer. Thus, a particularly suitable for damping or absorption vibrations material is used. A particularly preferred Shore A hardness of a plastic for damping phonotechnically relevant vibrations is 50. In the above Shore A hardness values, a plastic has the property that vibrations can be particularly well coupled into them and by internal friction, in particular the so-called hysteresis, energy is removed during elastic deformation. Thus, the vibration amplitudes of disturbing vibrations are reduced or the vibrations are damped.

In a further advantageous embodiment, the first and second or the first, second and third absorber element each have different materials, in particular different thermoplastic elastomers with different Shore A hardness. Thus, up to three different materials can be provided which damp vibrations with their internal friction in different frequency ranges. Thus, a damping or absorption of vibrations can be realized over a wide frequency band. Furthermore, it is also conceivable to stack four or more absorber elements with different materials.

In a preferred embodiment, the first, second and in the case of three absorber elements also the third coupling and contact region in the stacking direction protruding extensions. Alternatively, projections can also be provided only on a pairing of coupling and contact areas between two absorber elements. Further, the coupling and contact areas facing away, faces may also be different, for example, plan or flat. Between the extensions of the coupling and contact regions, there is provided in each case a gap for the positive reception of an extension of a coupling and contact region of an absorber element stacked with the respective absorber element. The extensions thus interlock and create a positive fit. It is thus produced a toothing or an intimate connection between the absorber elements, which generates a wealth of contact surfaces. These cause advantageous because of the surface friction occurring there increased vibration damping. Furthermore, a stable stackability of the absorber elements is ensured by the interlocking of the extensions. The stacked absorber elements can not slip relative to each other by the intermeshing and separated from each other only by moving apart in the stacking direction. Thus, a stack of absorber elements which is particularly easy to stack and at the same time provides a particularly secure form-fitting connection is provided.

According to a further embodiment, the first, second or third absorber element, in particular the stack in the middle absorber element, or even each of the absorber elements each have a coupling and contact area on two end faces. Thus, the absorber elements are stackable in any order, which is advantageous for the fine tuning of the vibration damping and / or for the stability of the stack. For example, the stiffest and / or hardest material can thus be arranged at the bottom, and the at least stiff or least hard material at the top in the stack. This ensures that the stack is stable and does not tip over.

According to a preferred embodiment, the absorber elements have a substantially circular circumference. Thus, on the one hand a universal form is provided and on the other hand a realized visually appealing form, which is an important selling point, especially for phonographic equipment.

According to an advantageous embodiment, the extensions are arranged in at least one ring arranged concentrically to the circular circumference. Thus, a symmetry of the absorber elements, in particular an axis symmetry, is produced, which results in a high stability of a stack of such absorber elements. Furthermore, in this way, contact surfaces oriented in a plurality of directions are created, which is advantageous for damping vibrations with different directions or different orientations. The ring structure also advantageously has a particularly reliable form-locking, whereby a very simple stacking is possible. Further advantages are that, if the vibration absorber is used in a rotating system, there is advantageously no imbalance about its main axis. Furthermore, the ring structure advantageously allows easy staple replacement if the absorber elements are to be fixed to one another with a clamp, for example a retaining ring. In a further advantageous embodiment, the extensions along the ring have a sinusoidal wave contour. Thus, a particularly harmonious transition between the extensions is provided, which favors a continuous friction at the contact surfaces and thus also promotes the vibration absorption.

In a preferred embodiment, a plurality of concentric rings are provided with sinusoidal wave contour in the coupling and contact area, wherein the same number of sinusoidal extensions are provided on outer and inner rings and the phase lengths of the respective sinusoids, which are described by the extensions, corresponding to the same amplitude the different circumference between outer and inner rings are adjusted. Thus, a wide variety of vibration characteristics can be damped by friction at the contact surfaces. Furthermore, in this way a high, in particular concentric, symmetry or axial symmetry of the absorber elements is generated, which in turn increases the stability of the stack of absorber elements of the vibration absorber.

In a further embodiment, the extensions are formed substantially sinusoidally in the radial direction. Alternatively, on the surface of the sinusoids, a plane vertex surface may be provided, which serves as a contact surface. In the case of the sinusoidal nature of the extensions in the radial direction, as it were, a three-dimensional wave structure is created on the surface of the coupling and contact region, which overall provides a particularly large contact surface between the absorber elements. This is particularly advantageous because a large contact surface, in particular with different curvatures, can escape the oscillation particularly high energy by surface friction. In this case, a lower end face form a negative mold of the upper end face. Alternatively, the contour of the surface, for example, by a rotation of the absorber elements to each other about their main axis, intermesh.

According to an alternative embodiment, the extensions are substantially cylindrical and have a recess, wherein the projections on a side facing away from the recess have a shape corresponding to the recess and are arranged at regular intervals to each other such that between the projections in each case a gap is provided , which is designed for the positive recording of a same extension.

Substantially cylindrical is to be understood that the extensions also cylinder-like forms, eg. B. conical, conical or frustoconical, pyramidal or truncated pyramid shaped may be formed. In particular, these forms can also be provided with rounded edges.

Thus, extensions of two absorber elements can interlock positively with one another when the absorber elements are stacked together. The recess ensures a stable form fit and at the same time a good stackability. A gap forms at least partially a negative form of an extension.

In a preferred embodiment, the base of a cylindrical extension is formed as a circular surface with a circular portion-shaped recess and has a same radius of the circle as the circular surface, wherein the circle center of the recess on the ring on which the extensions are arranged, outside the circular area. Two adjacent, substantially cylindrical, extensions are so far apart that exactly another such shaped extension fits between them. In the middle of the ring of extensions, a flat contact surface between the absorber elements is preferably provided, which serves to stabilize the stack in the center. Furthermore, an additional surface is thereby created, at which contact the absorber elements. Thus, vibration energy can be reduced by surface friction on this surface.

In an advantageous embodiment, the absorber elements, that is, two Absorber elements or at least three absorber elements, a common circumferential strapping on. This is particularly preferably formed as a circumferential retaining ring with recess. Thus, on the one hand an optical improvement of the vibration absorber is achieved, and on the other hand also added an additional resonance-receiving component. Furthermore, the stability of the vibration absorber is improved, in particular also in the stacking direction, because the strapping or the retaining ring holds the absorber elements together in the stacking direction.

In a preferred embodiment of a decoupling device, an upper plate in contact with the device housing and a lower ambiently contacting plate and at least three vibration absorbers therebetween are provided, the upper and lower plates being superimposed in parallel and the vibration absorbers being provided between the plates and are arranged, that the upper plate and the device housing are vibration-decoupled from the lower plate and the environment through the vibration absorber. With this device, a very stable state of the device housing despite a high possible stack height of the vibration absorber with a variety of absorber elements, d. H. with at least two and preferably at least three absorber elements, guaranteed in a stack. Furthermore, the plates themselves advantageously additionally damp vibrations due to their preferably rigid material, for example in high frequency ranges.

In a preferred embodiment of a vibratory mechanical system, the same has a device from the hi-fi area and, alternatively or additionally, a piece of furniture from the hi-fi area. In particular, the system comprises a player such as a turntable or a CD / DVD / BlueRay disc player, an amplifier, a power supply, a speaker such as a shelf box or a stand box, a hi-fi shelf, or a combination thereof. Alternatively, the oscillatory system may comprise another technical application in which a vibration-related decoupling from an environment is to be realized. This may be, for example, a machine decoupled from a foundation or floor, a work base, a measuring instrument, a tool or a machine tool, a measuring or analyzing device, a living or working piece of furniture or the like.

The above embodiments and developments can, if appropriate, combine with each other as desired. Further possible refinements, developments and implementations of the invention also include combinations, not explicitly mentioned, of features of the invention described above or below with regard to the exemplary embodiments. In particular, the person skilled in the art will also add individual aspects as improvements or additions to the respective basic form of the present invention.

CONTENT OF THE DRAWING

The present invention will be explained in more detail with reference to the exemplary embodiments indicated in the schematic figures of the drawing. It shows:

1A a vibration absorber according to the invention with two absorber elements, shown in the stacking order;

1B the vibration absorber according to the invention

1A in the stacked state;

2A . 2 B an embodiment of a vibration absorber according to the invention with three absorber elements;

3A . 3B a first embodiment of an absorber element in a side view and in an isometric view;

4A . 4B a second embodiment of an absorber element in a side view and an isometric view;

5A . 5B a third embodiment of an absorber element in a side view and an isometric view;

6A an isometric view of a fourth embodiment of an absorber element with cylindrical projections;

6B the absorber element 6A in a side view;

7A an embodiment of a vibration absorber with two absorber elements according to 6A and 6B shown in stacking order;

7B the vibration absorber according to 7A in a stacked condition;

8A a vibration absorber with three absorber elements according to 6A and 6B shown in stacking order;

8B the vibration absorber according to 8A in the stacked state;

9 a schematic representation of the geometric arrangement of the extensions of the fourth embodiment of an absorber element;

10 a front view of a decoupling device;

11 a cross-sectional view through a vibration absorber with retaining ring;

12 a perspective view of the vibration absorber 11 ,

The accompanying figures of the drawing are intended to convey a further understanding of the embodiments of the invention. They illustrate embodiments and, together with the description, serve to explain principles and concepts of the invention. Other embodiments and many of the stated advantages will become apparent with reference to the drawings. The elements of the drawings are not necessarily shown to scale to each other.

In the figures of the drawing are the same, functionally identical and same-acting elements, features and components - unless otherwise stated - each provided with the same reference numerals.

DESCRIPTION OF EMBODIMENTS

1 shows a first embodiment of a vibration absorber according to the invention 1 with two absorber elements 2 . 5 , shown in stacking order. The stack has a stacking direction S. The two absorber elements 2 and 5 are each the same shape and have a major axis 13 which runs parallel to the stacking direction. Each absorber element has an upper end side 3 and one under the front 6 on. The absorber elements 2 . 5 are essentially designed as round discs, being on the front sides 3 and 6 the discs coupling and contact areas 4 and 7 are provided.

In the illustrated embodiment, a coupling and contact area is on both end faces 4 . 7 intended. It is conceivable, however, that only one end face 3 . 6 the absorber elements 2 . 5 a coupling and contact area is provided and the other end face 3 . 6 which, so to speak, the upper or lower standing surface or bearing surface of the vibration absorber 1 forms, differently, in particular flat, is formed.

The coupling and contact areas 4 . 7 have a three-dimensional surface contour. This three-dimensional surface contour is in the stack or major axis protruding projections 11 formed, which are arranged annularly, concentric with the circular peripheral surface of the discs. In this case, three concentric rings are provided, each with eight extensions, each radially around the main axis 13 are arranged the same orientation. In each case substantially equal angle segments are covered by a series of radially arranged projections. Between the extensions are also uniformly distributed to the rings, formed by the expiring extensions interstices 12 or valleys provided, which also overlap radially within an angular segment of the concentric circles. The second absorber element 5 is the first absorber element 2 radially about an offset angle about the major axis 13 arranged offset so that the extensions of the first absorber element 2 in the interstices 12 or valleys 12 of the second absorber element 5 intervene, and vice versa. Here is the first absorber element 2 on the same main axis 13 arranged like the second element 5 so that the concentric rings overlap axially. This results in the coupling and contact area 4 and 7 in the stacked state between the first and second absorber element, a substantially closed side surface.

The absorber elements 2 . 5 are formed with different materials. They consist for example of thermoplastic elastomers, wherein the elastomers have different Shore A hardnesses. As a result, they are suitable and designed for damping different vibration frequencies. For example, the absorber elements consist of the thermoplastic polyurethane, which is marketed under the name "Elastollan" by BASF Chemical Company. This is for example in the technical information from BASF Chemical Company "Thermoplastic polyurethane elastomers (TPU) Elastollan ^® material properties" as of November 2011 described. Accordingly, this material is characterized, depending on the configuration, inter alia, by a hardness range of "60 Shore A to 74 Shore D" (determined according to DIN 53505 ), by "high wear and abrasion resistance", by "very good damping behavior" and by "high resistance to oils, fats, oxygen and ozone". These properties make this material very advantageous for vibration damping of mechanical systems for a variety of applications. In the softest configuration offered by BASF, the modulus of elasticity is about 10 MPa (N / mm ² ) and can be increased to more than 1000 MPa by adding various additives as needed. A preferred material variant "C 85 A" has, for example, an E-modulus of about 20 MPa at room temperature.

The TPU preferably contains plasticizers to precisely adjust the degree of hardness. Furthermore, it may of course be colored to improve the optically aesthetic appearance or to provide a fair market color selection available. In this case, the dye is introduced in such a way that no staining and no impression on other surfaces.

1B shows the first and second absorber element 2 . 5 in the stacked state. In this state, the extensions of the coupling and contact area engage 4 . 7 the two absorber elements 2 . 5 positively in one another. Thus surface friction is possible at the contact surfaces, by means of which vibrations in addition to the internal friction in the material can be absorbed or additional vibration energy can be converted into frictional heat or heat energy. Because the two absorber elements 2 and 5 Also have different vibration-absorbing materials, which additionally absorb vibrations by internal friction, a total of a very high proportion of induced by vibrations in the vibration absorber vibration energy, ideally the entire vibration energy, is converted into heat. This energy conversion takes place over a wide vibration frequency range, so that the vibration absorber damps a wide range of vibrations.

For example, with the vibration absorber 1 a phonograph device are decoupled from its environment by one or more, in particular three or four, vibration absorber according to the invention are interposed between the phonograph and a footprint of an environmental background. For example, the vibration absorbers can be positioned on the housing or on pedestals of the phono unit, the phono unit standing on the vibration absorbers.

2A and 2 B show a vibration absorber according to the invention with three absorber elements 2 . 5 and 8th , where in 2A the stacking order is shown and 2 B shows the stacked state. In this embodiment, the absorber elements 2 . 5 . 8th essentially equal to the absorber elements 2 . 5 according to 1A educated. The essential difference of this embodiment is that the central absorber element 8th , which is a third absorber element 8th represents, on two faces 3 . 6 . 9 Coupling and contact areas 4 . 7 . 10 needed. Thus, the middle, third absorber element 8th on both sides with the lower first absorber element 2 and the upper second absorber element 5 be stacked form-fitting. In the illustrated embodiment, all three are absorber elements 2 . 5 and 8th the same education. So that the absorber elements are stackable with each other, is the middle, third absorber element 8th relative to the first, lower absorber element 2 and to the upper, second absorber element 5 radially around the main axis 13 by an offset angle, which is half a sinusoidal period of the sinusoidal shape, rotated or offset. Thus, the extensions can 11 and spaces 12 the surface contours of the coupling and contact areas 4 . 7 . 10 interlock.

In the in 2 B illustrated, stacked state grab the extensions 11 according to one another, so that sinusoidal contact surfaces between the individual absorber elements 2 . 5 . 8th available. The sinusoidal contact surfaces may be of different types, with respect to the following 3A to 5B is described.

3A and 3B show a first embodiment of an absorber element. In this embodiment, the annularly arranged, sinusoidally extending extensions have 12 one at the apex of the appendages 11 along running, extending in the radial direction vertex surface 22 on. This results in a corrugated in the axial direction and in the radial direction surface extending contact surface ring 21 on the surface of in 3B shown coupling and contact area 4 . 7 , The described shape in this embodiment all three illustrated, concentrically arranged rings 21 of extensions 11 , which with evenly arranged valleys 12 (or spaces) are interspersed. Thus, the contact surface is predefined here on the corrugated ring contact surfaces. An identically shaped, second absorber element 5 can, as in the embodiment of 1A and 1B , with a first absorber element 2 by a radial angular offset about the major axis 13 , which is half a sine period of the sinusoidal form, are positively stacked. This creates contact surfaces on the vertex surfaces 22 along the wavy rings 21 ,

The 4A and 4B show an alternative embodiment of an absorber element. In this embodiment, the structure of the coupling and contact areas 4 . 7 altogether three-dimensionally sine wave-shaped. That means the extensions 11 not only along the shape of the ring 21 sinusoidal, but also in the radial direction. Thus, contact surfaces are not just along the rings 21 but also in the radial spaces 23 between the rings 21 and their extensions 11 created, which are available in total more surfaces for the desired surface friction for the absorption of vibration energy.

In this embodiment, upper and lower coupling and contact areas 4 . 7 the absorber elements to be stacked 2 . 5 . 8th accordingly, alternatively to a same geometry, also have a different geometry. For example, extensions are 11 a second absorber element 5 , which in the coupling and contact area 7 one to the coupling and contact area 4 of the first absorber element 2 having different geometry, arranged so that they are in between the rings 21 of the first absorber element 2 provided spaces 23 intervention. The gaps 23 have, so to speak, as a negative form, also a three-dimensional sinusoidal surface contour, so that a total of three-dimensional, over almost the entire surface of the absorber elements 2 . 5 extending, coupling and contact area results. Excluded are only the peripheral edges and the center of the absorber elements. The contact surface also extends over this surface in the stacked state. Due to the three-dimensional corrugation is thus a very large contact surface between the absorber elements 2 . 5 created which is larger than the mere cross-sectional area of an absorber element. In this embodiment, as a result of the large contact surface increased surface friction between two absorber elements take place.

Of course, three or more such absorber elements, in particular of different materials, are stacked together. By selecting the materials of the absorber elements, the damping characteristic can still be specifically influenced or designed.

As an alternative to the different surfaces, the coupling and contact areas 4 . 7 also in this embodiment on both end faces 3 . 6 or with both absorber elements 2 . 5 be the same. In this case, the contours of the rings complement each other as in the embodiment 3A and 3B , with the difference that no predefined contact surface is provided, but rather the contact surface results from the contact of the three-dimensional sine waves, if necessary also under elastic deformation under the weight of a phono device, for example.

5A and 5B show a further embodiment of an absorber element, wherein the basic design on the in 4A and 4B shown absorber element based. In the 5A and 5B The embodiment shown differs in that the amplitudes of the sinusoids are greater. This creates higher processes 11 with more inclined surfaces, which leads to an additional enlargement of the contact surface.

The 6A and 6B show a fourth embodiment of an absorber element. Here are the extensions 33 formed with an alternative shape design. This sees in the illustrated embodiment arranged in a ring shape, knob-like or cylindrical extensions 33 in front. The cylindrical extensions 33 are doing with a recess 32 provided and evenly spaced with a gap 39 arranged to each other. The gap 39 is to receive a same knob or a same cylindrical extension 33 educated.

The geometric arrangement of the extensions of the fourth embodiment is in 9 shown schematically. About the circumference of the concentric ring 38 , which leads to the round outer contour of the absorber element 2 is arranged concentrically, are eight evenly distributed and identically formed extensions 33 arranged. Each of these extensions 33 is in the axial direction of the absorber element 2 before and has as a cylinder base a circular area 31 with a circular section-shaped recess 32 on. The circular section-shaped recess 32 has the same circular radius R as the otherwise circular base 31 and has its center of circle M outside the base area 31 , The circle center M is along the ring 38 which is in 9 located, moved. On this ring 38 which passes virtually through the circle centers M of the extensions 33 and recesses 32 can be pulled, are all circle centers M of the extensions 33 as well as the circular recesses 32 evenly distributed over the circumference. In 9 for the sake of simplicity, this is only for a quarter of the ring 38 shown. This geometry is, however, how 6A shows over the entire ring 38 evenly.

The circle centers M of the base areas always change 31 with the circle centers M of the recesses 32 from. Furthermore, the distances between the extensions 33 so chosen, and the extensions 33 are dimensioned such that in the space 39 between two extensions 33 exactly the same extension 33 is positively inserted. Thus, an extension 33 with a same shape, which another absorber element 5 is associated, when stacking the absorber elements 2 . 5 in the gap 39 introduced, whereby the stacked absorber elements 2 . 5 be positively connected with each other. The form fit comes in particular through the recesses 32 which are the extensions 33 make each other form-fitting coupled.

This ensures easy stackability and the absorber elements are not jammed at all edges of the extensions 33 Radii or curves 35 . 36 intended. Especially in the area of contact surfaces these radii 35 . 36 always formed correspondingly. thats why at the upper edge of an extension 33 a positive rounding 35 and at the lower edge of an extension 33 a negative rounding 36 provided so that in the stacked state, the curves also form a contact surface.

In the center of the absorber element is an annular stacking paragraph 34 provided, which is about half as high as the extensions 33 is formed and is provided for providing additional contact surface and for stabilizing the stack in the center. When stacked, the stack heels complement each other 34 stacked absorber elements 2 . 5 to the height of the extensions 33 , This results in a large, nested contact surface between the absorber elements in the area of the complete coupling and contact areas 4 . 7 with the extensions 33 as well as in the area of stack heels 34 , Furthermore, contact friction surfaces oriented in a plurality of spatial directions are provided. The absorber elements according to this embodiment are particularly stably stackable with each other, since here the form fit in the circumferential direction again with the rounding of the recess 32 is provided.

The in the 3A to 6B illustrated embodiments of an absorber element have in the center a through hole along the main axis 13 on. This can be used, for example, for centering the absorber elements with a bolt, not shown, or the like. It is also conceivable that the absorber elements are fastened by means of an inserted through the through hole fastening means to a housing or a plate. Furthermore, these embodiments of an absorber element at the outer edge heels 53 . 54 auf, by means of which the absorber elements can be stapled together or strapped together, for example, as in relation to the 10 and 11 detailed, by means of a retaining ring 51 ,

7A and 7B show two absorber elements 2 . 5 according to 6A and 6B , where in 7A the stacking order is shown and 7B shows the stacked state. The two illustrated absorber elements 2 and 5 are geometrically equal and radially about the major axis 13 offset from each other. The radial offset 37 has a twist angle, which with respect to the center of the ring 38 on which the extensions 33 are arranged, the angle between the circle center M of an extension and the circle center M of its recess 32 equivalent. The circle center M of the recess 32 a first absorber element 2 coincides in the stacked state with the circle center M of an extension 33 of the second absorber element 5 , Since the distances between the circle centers M of the extensions 33 and the recesses 32 regularly over the circumference of the ring 38 are arranged, the extensions alternate 33 of the first absorber element 2 and the second absorber element 5 continuous and form-fitting with each other. Thus arises from the coupling and contact areas 4 . 7 the two absorber elements 2 . 5 on their faces 3 and 6 in the stacked state, an intimate interlocking bond, as in 7B shown.

8A and 8B show a vibration absorber with three absorber elements 2 . 5 and 8th , wherein analogous to the embodiment of 2 B the third, middle absorber element 8th necessarily on both ends 3 and 6 Coupling and contact areas 4 and 7 having. This is also about the radial offset 37 to the first and second absorber element 2 . 5 added. The coupling and contact areas 4 . 7 are on both ends 3 . 6 an absorber element 2 . 5 . 8th equal, mirror symmetry to a radial center plane of the absorber element 2 . 5 . 8th , educated. The three absorber elements 2 . 5 . 8th thus get to the coupling and contact areas 4 . 7 positively engaged with each other when stacked.

The stacked state is in 8B shown. This consists of the three absorber elements 2 . 5 and 8th in the area of their coupling and contact areas 4 . 7 in each case a positive connection with a plurality of oriented in different spatial directions friction or contact surfaces.

10 shows a front view of a decoupling device 40 , In this, the vibration absorber according to the invention 1 in the decoupling device 40 used. The decoupling device 40 is constructed such that one or more vibration absorbers 1 , in the example shown, four vibration absorbers 1 (with the back two covered by the front ones) between two plates 42 . 43 are interposed. A lower plate 43 lies on an ambient background 44 on and the top plate 42 serves as a stand for the phono unit 41 with housing 45 , The plates 42 . 43 are made of plexiglas, slate, MDF (medium density fiber), multiplex or other rigid material. With this device, a very stable state of the phono unit is ensured despite a high stacking height of the vibration absorber with a plurality of absorber elements in a stack. For example, in a stack according to the embodiment as a vibration absorber 1 three absorber elements provided in a stack. Further, the plates dampen 42 . 43 even additional vibrations.

11 shows a cross-sectional view through a vibration absorber 1 with retaining ring 51 , The vibration absorber 1 has a first absorber element in this embodiment 2 and a second absorber element 5 on. The absorber elements 2 . 5 are stacked on each other in the manner described in relation to the preceding embodiments. The retaining ring 51 straps the absorber elements 2 . 5 outside, concentric around the main axis 13 , The retaining ring 51 is around the main axis 13 formed rotationally symmetrical and has on its inside a puncture 52 on. This puncture 52 forms at the top and bottom of the retaining ring 51 in each case an inside paragraph. The upper and lower absorber element 2 . 5 have at their outer edges in each case a circumferentially formed paragraph 53 . 54 on. These paragraphs 53 . 54 are in the illustrated assembled state in the region of the groove 52 and stand by the puncture 52 formed inside paragraphs of the retaining ring. Thus, the upper and lower absorber elements become 2 . 5 held together. Further, the retaining ring, which includes, for example, a metal with a polished, brushed or chrome-plated outer surface, provides an improved optical-aesthetic appearance of the vibration absorber. This is particularly advantageous in the case of home phono technology, since it also depends on the aesthetics of functional elements. Furthermore, with the retaining ring is another material component for vibration damping ready.

For mounting the retaining ring, the absorber elements preferably made of flexible TPU are under flexible deformation with their paragraphs 53 . 54 into the puncture 52 of the retaining ring pressed.

Shown is the vibration absorber with absorber elements 2 . 5 according to the third embodiment. The absorber elements 2 . 5 but according to the first, second or fourth embodiment are also with retaining ring 51 usable.

12 shows a perspective view of the vibration absorber 1 out 11 , The perspective is chosen so that the surface profile of the upper, second absorber element 5 and the upper and outer edges of the retaining ring 51 are visible. The lower, first absorber element 2 is only by its downward protruding extensions 11 , which protrude in the illustrated perspective on the lower edge of the retaining ring to recognize.

In this embodiment, the vibration absorber is preferably without plates 42 . 43 used and can be placed directly under a phono unit for decoupling from its ambient background. For this purpose, three or four such vibration absorbers, for example four vibration absorbers, are each placed at the corners of a cuboid phono device.

In all embodiments, it is advantageous if the different absorber elements different materials or different properties, such as different Shore A hardnesses, because it allows vibrations of different frequency ranges can be absorbed by internal friction in the material.

Although the present invention has been fully described above with reference to preferred embodiments, it is not limited thereto but is modifiable in a variety of ways.

Although the present invention will be described below by way of examples of the phonetic technique, it is not limited thereto. Rather, it can be used in all technical fields in which the attenuation of vibrations transmitted between different assemblies, components or elements is significant.

For example, the vibration absorber according to the invention could also be provided in a different order of magnitude and / or with materials adapted to the other order of magnitude. For example, the use is just as conceivable on a machine tool, for example, to increase manufacturing accuracy by vibration-technical decoupling of the machine bed from his environment. For example, with the vibration absorber, the machine tool could also be decoupled from the factory floor on which other machines are located. Of course, the materials of the absorber elements would have to be adapted to the vibration energy to be absorbed, to the frequency ranges and to the weight of the machine to be supported.

Furthermore, the absorber elements of the vibration absorber need not have a round circumference, but could also be any appropriate, for. B. have angular basic shape. Furthermore, the extensions in the coupling and contact areas can also have a polygonal shape. For example, it would be conceivable that the basic shape and / or the shape of the projections are square or hexagonal.

In the case of a quadrangular basic shape, the entire end face can be provided, for example, with parallelepipedal projections, in particular arranged in a checkerboard pattern with alternating extensions and interspaces, which occur during the Checkerboard pattern rather than pockets or depressions are formed. The extensions of a second coupling and contact area then have the negative form of the checkerboard pattern. That is, the extensions of the second coupling and contact are provided where the first coupling and contact region has its recesses, and vice versa. Thus, a very large contact surface is created, which extends over the end faces and the flanks or lateral surfaces of the extensions.

The same principle is also conceivable in a hexagonal basic form with hexagonal extensions with a honeycomb pattern instead of the checkerboard pattern. In the case of all patterns and geometries of the extensions, these can be tapered or frusto-conical or pyramid-like or truncated pyramid-shaped and / or rounded. The depressions can accordingly also be tapered and / or rounded.

Furthermore, the basic shape can also be formed independently of the shape of the projections.

Of course, a retaining ring can also grip and hold together three or more absorber elements.

As an alternative to a one-piece design of the retaining ring and a multi-part design is conceivable. For example, an upper and a lower retaining ring member could be screwed with a thread, pressed together, glued or otherwise connected. In this case, advantageously less flexible absorber elements could be inserted into the stack.

The retaining ring can also be provided in a decoupling device according to the invention on the vibration absorber.

LIST OF REFERENCE NUMBERS

1

vibration absorber

2, 5, 8

absorber elements

3, 6, 9

front sides

4, 7, 10

Coupling and contact areas

11, 33

projections

12

Intermediate spaces or valleys

13

main axis

20

scope

21

ring

22

apex surface

23

Radial gap

31

Circular surface with recess or base

32

recess

34

stacking shoulder

35, 36

Radii, curves

37

angular displacement

38

ring

39

gap

40

decoupling device

41

phonographic apparatus

42

upper plate

43

lower plate

44

Environmental background, environment

51

Retaining ring, strapping

52

puncture

53, 54

Paragraphs of the absorber elements

R

radius

S

stacking direction

M

Circle center

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited non-patent literature

• DIN 53505 [0062]

Claims (20)

Vibration absorber ( 1 ; 30 ), in particular for the acoustic decoupling of a phono device from its surroundings, with a first absorber element ( 2 ), which on at least one end face ( 3 ) a first coupling and contact area ( 4 ) having a three-dimensionally shaped first surface contour, with a second absorber element ( 5 ), which on at least one end face ( 6 ) a second three-dimensional coupling and contact area ( 7 ) having a three-dimensionally shaped, corresponding to the first surface contour, second surface contour, wherein the first and the second coupling and contact area ( 4 . 7 ) are provided and designed such that the first absorber element ( 2 ) with the second absorber element ( 5 ) is positively stackable. Vibration absorber according to one of the preceding claims, characterized in that the first and the second three-dimensional surface contour are identical, such that the first and second absorber element ( 2 . 5 ) are positively stackable with each other by a radial and / or lateral offset. Vibration absorber according to one of the preceding claims, characterized in that at least one third absorber element ( 8th ) is provided, which on at least one end face ( 9 ) a third coupling and contact area ( 10 ) having a three-dimensionally shaped third surface contour, wherein the third coupling and contact region ( 10 ) is provided and designed such that the third absorber element with the first and the second absorber element ( 2 . 4 ) is positively stackable. Vibration absorber according to one of the preceding claims, characterized in that the first and / or second and / or third absorber element ( 2 ; 5 ; 8th ) contains at least one thermoplastic elastomer, in particular thermoplastic polyurethane or silicone, and / or wood and / or a metal and / or a metal alloy. Vibration absorber according to one of the preceding claims, characterized in that the first and / or second and / or third absorber element ( 2 ; 5 ; 8th ) contains a plastic having a Shore A hardness of from 20 to 80, in particular from 30 to 60. Vibration absorber according to one of claims 5 or 6, characterized in that the first and second or the first, second and third absorber element ( 2 . 5 ; 2 . 5 . 8th ) each contain different materials, in particular different thermoplastic elastomers with different Shore A hardness. Vibration absorber according to one of the preceding claims, characterized in that the first and / or second and / or third coupling and contact region ( 4 ; 7 ; 10 ) in the stacking direction (S) projecting extensions ( 11 ; 33 ), between each of which a gap ( 12 ) for the positive reception of an extension ( 11 ) of a coupling and contact area ( 4 ; 7 ; 10 ) one with the first and / or second and / or third absorber element ( 2 ; 5 ; 8th ) stacked absorber element ( 2 ; 5 ; 8th ) is provided. Vibration absorber according to one of the preceding claims, characterized in that the first and / or second and / or third absorber element ( 2 ; 5 ; 8th ) each on two end faces ( 3 ; 6 ; 9 ) a coupling and contact area ( 4 ; 7 ; 10 ) having. Vibration absorber according to one of the preceding claims, characterized in that the absorber elements ( 2 ; 5 ; 8th ) has a substantially circular circumference ( 20 ) exhibit. Vibration absorber according to claim 9, characterized in that the extensions ( 11 ; 33 ) in at least one concentric with the circular circumference ( 20 ) arranged ring ( 21 ; 38 ) are arranged. Vibration absorber according to claim 9 or 10, characterized in that the extensions ( 11 ; 33 ) along the ring ( 21 ; 38 ) have a sinusoidal wave contour. Vibration absorber according to claim 11, characterized in that a plurality of concentric rings ( 21 ) with sinusoidal wave contour in the coupling and contact area ( 4 ; 7 ; 10 ) are provided, wherein on outer and inner rings ( 21 ) each have the same number of sinusoidal extensions ( 11 ) are provided and the phase lengths of the respective sinusoids at the same amplitude corresponding to the different circumference between outer and inner rings ( 21 ) are adjusted. Vibration absorber according to claim 12, characterized in that the projections ( 11 ) are formed substantially sinusoidally in the radial direction. Vibration absorber according to claim 10, characterized in that the extensions ( 33 ) are formed substantially cylindrical and a recess ( 32 ), wherein the extensions ( 33 ) On a side facing away from the recess a corresponding shape to the recess shape and are arranged at regular intervals to each other such that between the extensions ( 33 ) each one space ( 39 ) is provided, which for the positive reception of a same extension ( 33 ) is trained. Vibration absorber according to claim 14, characterized in that the base of a cylindrical extension ( 33 ) as a circular area ( 31 ) with a circular section-shaped recess ( 32 ) is formed and the recess ( 32 ) has the same circle radius (R) as the circular area ( 31 ), wherein the circle center (M) of the recess ( 32 ) on the ring ( 21 ) outside the circular area ( 31 ) lies. Vibration absorber according to one of the preceding claims, characterized in that the absorber elements ( 2 ; 5 ; 8th ) a common circumferential strapping ( 51 ), in particular a circumferential retaining ring ( 51 ) with puncture ( 52 ), exhibit. Decoupling device ( 40 ), in particular for the acoustic decoupling of a phono device ( 41 ) of its environment, with at least one plate ( 42 ; 43 ), at least one device housing ( 45 ) and at least one vibration absorber ( 1 ) according to one of the preceding claims, wherein the plate ( 42 ; 43 ) and the vibration absorber ( 1 ) between the device housing ( 45 ) and an environment ( 44 ) of the device housing ( 45 ) are arranged. Decoupling device according to claim 17, characterized in that an upper with the device housing ( 45 ) in contact ( 42 ) and a lower one with the environment ( 44 ) in contact ( 43 ) and in between at least three vibration absorbers ( 1 ), the upper and lower plates ( 42 . 43 ) parallel to each other and the vibration absorbers ( 1 ) between the plates ( 42 . 43 ) are provided and arranged such that the upper plate ( 42 ) and the device housing ( 45 ) from the lower plate ( 43 ) and the environment ( 44 ) by the vibration absorbers ( 1 ) are decoupled vibration technology. Oscillating mechanical system, in particular device ( 41 ) with a housing ( 45 ), damped by a vibration absorber ( 1 ) according to one of claims 1 to 16 or by a decoupling device ( 40 ) according to claims 17 or 18. System according to claim 19, characterized in that the system is a device ( 41 ) and / or a piece of furniture from the hi-fi area, in particular a playback device, an amplifier, a power supply, a loudspeaker and / or a hi-fi shelf.

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