arrangement for reduction

Abstract

Arrangement for reducing vibrations and oscillations with a magnetically acting vertical absorber system for damping vertical oscillations, in which a device for horizontal damping is additionally provided.

Description

[0001] The invention relates to an arrangement for reducing vibrations and / or oscillations, which in particular serves to isolate or dampen shock-sensitive devices by positioning the arrangement between the device to be protected and its support surface.

[0002] A typical application is in audio technology, where vibration-sensitive audio components, such as record players, CD players, tube amplifiers, loudspeakers, etc., need to be decoupled from the surface they are placed on. Another application is in weighing technology. In this area, it is important to note that high-resolution analytical balances are extremely sensitive to vibrations, which negatively impact the accuracy of the measurement results.

[0003] One problem with vibration-sensitive devices is the transmission of external disturbances to the device or from the device itself to its surroundings. These disturbances include, for example, impact noise, sound waves, and shocks and vibrations from the immediate vicinity.

[0004] To reduce disruptive vibrations, it is advisable to mechanically decouple the contact surfaces between the device and its support points. This can be achieved, for example, using springs, rubber buffers, spikes, or similar devices. Mechanically acting vibration dampers based on these principles have long been available on the market and will not be described in detail here.

[0005] Mechanically acting vibration damping elements offer significant advantages, but they have the crucial disadvantage that there are still fixed, mechanically closed contact points with the mounting surface, through which disturbances can be transmitted, albeit in a mitigated form. Furthermore, the unavoidable aging process of the damping materials used has a negative impact.

[0006] Magnetic damping elements are already available on the market. These are based on the principle of aligned and therefore repelling magnetic poles. This is described as the levitation effect. Functionally, these dampers are already relatively effective and significantly better than mechanically acting ones, since there is no damping material between the contact points, but rather a magnetic field with an axial air gap. Magnetic dampers, in principle, do not exhibit an aging effect.

[0007] Levitation-based dampers have the disadvantage of being mechanically quite unstable when considered as a functional unit. The repelling magnets always exhibit a physically unavoidable radial drift, since the like poles have an inevitable and strong tendency to move towards their respective opposite pole. Therefore, such arrangements absolutely require mechanical centering and guidance, which has a detrimental effect on handling and especially on stability. Furthermore, the damping effect only occurs in one direction: axially towards the point of contact.

[0008] Against this background, an arrangement for reducing vibrations and oscillations with the features of claim 1 is described. Embodiments are described in the dependent claims and in the description.

[0009] The presented arrangement serves to reduce vibrations and oscillations and features a vertical absorber system or damping system for damping vertical oscillations, in which a device for horizontal damping is also provided.

[0010] This device for horizontal damping includes, in its embodiment, a base part in which balls, in particular metal balls, are implemented for axial movement absorption.

[0011] The base part can form an independent functional unit with six or more spheres embedded in congruently arranged centering radii, which actively contributes to reducing the horizontal kinetic energy.

[0012] Thus, an arrangement is presented that represents a vibration and oscillation damper based on the principle of magnetically opposite-polarity attraction effects.

[0013] With this arrangement, the aforementioned disadvantages of mechanical and levitation-magnetic damping elements can be avoided, and the advantages of magnetism with its excellent damping properties can be utilized.

[0014] This is achieved by a vibration and shock absorber based on the oppositely acting magnetic attraction principle, with the characteristics described above and below.

[0015] The presented arrangement is based on the principle of the magnetic attraction between north- and south-polarized magnets. In this configuration, a conical magnet with north polarity (facing the narrow side) is embedded in a ring magnet with south polarity (facing the top) within the head or piston of the damping element. In this orientation, the ring magnet attracts the conical magnet and positions it at the center of the ring magnet, at the transition point between the north and south polarities. This results in extremely stable operation with high compressive and tensile strength. Vibration damping in this part of the mechanism occurs in a vertical orientation.

[0016] Another key aspect of the invention lies in the ability to absorb horizontal vibrations. This is achieved in one embodiment by means of six or more spheres, e.g., steel spheres, positioned in radial recesses on identical circles. Their centric alignment is enforced by the radial recesses. In this configuration, six or more radial recesses are formed on a single circle, within which the steel spheres move horizontally. The identical radii above and below the spheres create a centering effect, allowing the base to move circularly in all directions in response to vibrations and, moreover, to automatically align itself centrally with the control element above it.

[0017] The base section adheres to the damping system on the vertical absorber system above it by means of a disc magnet embedded in the base section, oriented towards the pot magnet facing north. This causes the attached base section to magnetically adhere to the pot magnet of the actuator, thus forming a stable overall assembly.

[0018] Furthermore, a height adjustment mechanism can be provided. This allows for height adjustment via an external thread in the adjusting element and an internal thread in the base, without having to remove the absorber system or damper from its operating position. The height adjustment is thus performed while installed, which significantly improves handling compared to various known designs. Knurling can be applied to the adjusting element to enhance grip.

[0019] The load-bearing capacity of this magnetic arrangement can be increased by joining two identical ring magnets to form a double magnet, ensuring that the north and south poles of the ring magnets attract each other. In this configuration, their centrally acting magnetic force is almost doubled, and this is achieved with very compact dimensions.

[0020] In some designs, one or more ring magnets are embedded and pressed into a base made of plastic or another non-magnetic material, such as aluminum, so that the top of the magnet is flush with the outer shape of the base.

[0021] In further designs, a conical magnet, oriented with north towards its narrow underside, is embedded in a top section, also made of plastic or a non-magnetic material such as aluminum, and pressed into place with a clamping piece so that, ideally, it protrudes as far downwards as possible. This is necessary to minimize magnetic shielding caused by the material surrounding the magnet. Furthermore, the shaft of the mounting serves as a centering and guide within the ring magnet.

[0022] The functional part of the design consists of inserting the upper part with the conical magnet into the lower part with the ring magnet(s). These two assemblies attract each other axially with considerable force. Due to their mutual polarity, the upper part with the conical magnet slips into the lower part with the ring magnet(s), forming a stable and compact vibration damping unit with high load-bearing capacity and stability.

[0023] Furthermore, it should be noted that the implemented damping feet, considered as a unit, are load-stable in both directions, i.e., in compression and tension, and can absorb forces. This greatly increases the stability of the devices positioned on them, as it prevents fluctuations and the associated risk of tipping, such as that which can occur with slim and tall loudspeakers.

[0024] In a further embodiment, a counter magnet with north polarity facing the adhesive side, e.g., a so-called pot magnet or flat gripper, is incorporated into the lower part. By attaching such a counter magnet, a significant increase in the holding force is achieved due to its polarity alignment with the narrow, downward-facing side of the cone magnet. The pot magnet is cast into a metallic shielding housing, which allows it to be fully magnetic in only one direction. This proves advantageous in application, as it virtually eliminates the magnetism that is not required on the underside of the damping element. When surrounded by a metal casing, the pot magnet also serves as a shield.

[0025] Alternatively, a disc magnet can be used instead of a pot magnet to increase the load-bearing capacity. However, it should be noted that this type of magnet exerts the same magnetic force on both pole faces, which is also noticeable externally, specifically in areas where it might not be desired.

[0026] In addition to the points mentioned above, magnets with reversed polarity can also be used, as described above. However, this does not affect the function. Only the polarity of the magnets relative to each other needs to be adjusted during their arrangement.

[0027] An important feature is an attached base section which, in addition to the axial damping effect described above, also provides damping of horizontal influences, which is advantageous. In this configuration, six or more radial recesses or centering radii are embedded on a bolt circle, in which balls move horizontally. The identical radii above and below the balls create a centering effect, allowing the base section to move circularly in response to vibrations and automatically align itself centrally.

[0028] It is understood that the features mentioned above and those to be explained below can be used not only in the combinations specified, but also in other combinations or on their own, without leaving the scope of the present invention.

[0029] Further advantages and embodiments of the invention will become apparent from the description and the accompanying drawing. Brief description of the drawing Fig. Figure 1 shows a cross-sectional view of an embodiment of the presented arrangement. Fig. Figure 2 shows a simplified version of the presented arrangement without taking into account the horizontal damping effect. Fig. Figure 3 shows a simplified version of the presented arrangement without taking into account the horizontal damping effect. Fig. Figure 4 shows a further simplified version of the presented arrangement without taking into account the horizontal damping effect. Fig. Figure 5 shows a further simplified version of the presented arrangement without taking into account the horizontal damping effect. Embodiments of the invention

[0030] The invention is schematically illustrated with reference to embodiments in the drawing and is described in detail below with reference to the drawing.

[0031] Fig. Figure 1 shows in a sectional view an arrangement of the type described herein, which is generally designated by the reference numeral 100 and represents a vibration and shock damper acting by means of magnetic attraction.

[0032] The illustration shows a cone magnet 102, a ring magnet 104, an end stop 106, a pot magnet 108, a disc magnet 110, a press piece 112 for the cone magnet 102, a soft rubber pad 114, a piston 116, an adjusting element 118, a lower part 120, balls 122, in particular steel balls, a base part 124 and a felt disc 126. A thread 130 is designated by reference numeral 130.

[0033] This threaded function, consisting of internal and external threads which interact and are each assigned to the adjusting part 118 or the lower part 120, constitutes a device for height adjustment.

[0034] The ring magnet 104 is pressed into the adjusting part 118 from the top. The conical magnet 102 is inserted into the piston 116 by means of the pressing piece 112, so that it protrudes downwards by a few millimeters.

[0035] The pot magnet 108, acting as a counter magnet, serves to increase the load and is pressed into the base of the adjusting part 118. In the base part 124 and in the adjusting part 118, balls 122 are recessed and positioned in radial depressions with identical pitch circles and a 30-60° spacing, corresponding to the spacing.

[0036] During assembly of the magnetically actuated vibration damper, the piston 116, with the embedded conical magnet 102, is inserted into the adjusting part 118, which contains the ring magnet 104 and, depending on the design, also a pot magnet 108 acting as a counter magnet. The adjusting part 118 is screwed into the lower part 120, which has an internal fine thread, using an external fine thread.

[0037] Six or more steel balls 122 are placed in the radial recesses in the base part 124. Furthermore, the disc magnet 110 is inserted centrally in the base part 124.

[0038] The base part 124, with the steel balls 122 and the embedded disc magnet 110 contained therein, is now attracted to the lower part 120 by means of magnetic forces.

[0039] The piston 116 with the inserted conical magnet 102, which here represents the component referred to previously and subsequently as the head or upper part, is magnetically positioned in the adjusting element 118 with the ring magnet 104 inserted therein in a vertical orientation. The counter magnet or pot magnet 108, embedded on the bottom side of the adjusting element 118, increases the possible load.

[0040] The base 124, containing embedded steel balls 122, is magnetically attracted to the pot magnet 108 in the adjusting element 110 by means of the disc magnet 110 and positions itself centrally on the adjusting element. Thus, thanks to the steel balls 122 rolling within their respective centering radii, the base 124 can absorb horizontally occurring vibrations. The base 124 with the balls 122 forms a device for damping horizontal oscillations and vibrations.

[0041] The interacting magnets represent an embodiment of the vertical absorber system or damping device for damping horizontal oscillations and vibrations.

[0042] In the Fig. 2, Fig. 3, Fig. 4 to Fig. Section 5 describes a simplified version of the vibration and oscillation damper, illustrating the principle of the magnetic attraction damper. In this version, the elements for horizontal damping are not shown. The arrangement described herein can be achieved through combinations of the designs described in Section 5. Fig. 2, Fig. 3, Fig. 4 to Fig. 5 with the in Fig. 1. In particular, this also includes embodiments of the arrangement that incorporate the elements for horizontal damping with the features of the embodiments of the Fig. 2, Fig. 3, Fig. 4 to Fig. 5 combine them.

[0043] Fig. Figure 2 shows a partially cutaway view of an embodiment of the arrangement, which is designated in its entirety by reference numeral 200. The illustration shows a lower part 202, an upper or head part 204, a ring magnet 206, a cone magnet 208, a non-slip pad 210, also referred to as a foam rubber pad, both on the top and bottom, an end stop damper 212, and a clamping piece 214. The pad 210 is made, for example, of EPDM cellular rubber.

[0044] Fig. Figure 3 shows a further embodiment of the arrangement, designated in its entirety by reference numeral 300, in a partially cutaway view. The illustration shows a lower part 302, a head part 304, ring magnets 306, 307, which are typically identical in construction, a cone magnet 308, a non-slip support 310 at the top and bottom, an end stop damper 312, and a clamping piece 314.

[0045] Fig. Figure 4 shows a further embodiment of the arrangement in a partially cutaway view, which is designated in its entirety by the reference numeral 400. The illustration shows a lower part 402, a head part 404, a ring magnet 406, a cone magnet 408, a non-slip support 410 at the top and bottom, an end stop damper 412, a clamping piece 414 and a counter magnet 416.

[0046] Fig. Figure 5 shows a further embodiment of the arrangement, designated in its entirety by reference numeral 500, in a partially cutaway view. The illustration shows a lower part 502, a head part 504, ring magnets 506 and 507, which are typically identical in construction, a cone magnet 508, a non-slip support 510 at the top and bottom, an end stop damper 512, a clamping piece 514, and a counter magnet 516.

[0047] The design, assembly, and functionality are described below, taking into account the Fig. 2, Fig. 3, Fig. 4 to Fig. 5 using the reference symbols of the Fig. 5 explained.

[0048] The ring magnet(s) 506, 507 are incorporated into the base part 502. This is done, for example, using a hydraulic press, with a bore dimension 0.2 mm smaller than the size of the magnet(s) used. It is important to ensure that the upper edge of the ring magnet(s) 506, 507 is flush with the upper edge of the base part 502.

[0049] The counter magnet 506 for increasing the load is machined into the recess on the bottom of the base part 502. This is also done using a hydraulic press, with the recess being 0.2 mm undersized compared to the dimension of the ring magnet(s) 506, 507 used. It is important to ensure that the underside of the pot magnet or counter magnet 516 is flush with the underside of the base part 502.

[0050] The cone magnet 508 is machined into the head part 504 with zero play. This is achieved by means of a precisely machined recess with a small, beveled collar at the front, which acts as a stop. This ensures that the cone magnet 508 is firmly fixed in its final position when pressed with the clamping piece 514. This is done, for example, using a hydraulic press, with the recess machined 0.2 mm smaller than the clamping piece 514. The clamping piece 514 has an integrated threaded hole for a fastening screw. It is important to ensure that the top edge of the clamping piece 514 is flush with the top edge of the head part 514.

[0051] During the assembly of the arrangement 500, which constitutes a magnetically acting vibration and oscillation damper or a vertical absorber system, the head section 504 with the pressed-in conical magnet 508 is inserted into the base section 502, in which the ring magnet(s) 506, 507, and, depending on the design, also the counter magnet 516 are pressed. The two components then pull together, thus forming a functional damping unit. For slip resistance, so-called foam rubber pads 510 with a thickness of 2 to 3 mm are glued to both the underside of the base section 502 and the top of the head section 504. Alternatively, a needle felt disc can be glued to the underside of the base section 502 to facilitate easier movement on the surface. In the lower part 502, a piece of foam rubber 510, approximately 10 mm in diameter, is glued in to dampen the end stop 512.

[0052] The head section 504, with the inserted conical magnet 508, is positioned axially within the base section 504, which contains the ring magnet(s) 506, 507, due to their mutual magnetic polarity. In this magnetically fixed position, it is possible to absorb axial forces in both directions and thereby very efficiently dampen oscillations and vibrations. Depending on the applied load, the conical magnet 508 extends into the ring magnet(s) 506, 508 until it reaches the end stop 512. This end stop also limits the insertion depth, which corresponds to the maximum load.

[0053] The maximum load capacity can vary depending on the magnet strength and size. The counter magnet 516, recessed into the base, increases the possible load capacity. Depending on the application, any number of magnetic vibration dampers can be installed, ultimately significantly increasing the total possible load capacity. For stability, at least three damping feet should be used. Arrangements of four, six, or eight dampers are also possible.

[0054] It is important that the in Fig. 2, Fig. 3, Fig. 4 to Fig. The embodiments shown in section 5 are disclosed separately and in combination with a device for damping horizontal oscillations and vibrations, such as those described in Fig. 1 is achieved by the balls stored in the base part.

Claims

[1] Arrangement for reducing vibrations and oscillations with a magnetically acting vertical absorber system for damping vertical oscillations, in which a device for horizontal damping is additionally provided. [2] Arrangement according to claim 1, wherein the horizontal damping device comprises a base part (124) in which balls (122), in particular steel balls, are implemented for axial motion absorption. [3] Arrangement according to claim 2, wherein the base part (124) with six or more spheres (122) embedded in congruently arranged centering radii forms an independent functional unit which actively contributes to the reduction of the horizontal kinetic energy. [4] Arrangement according to claim 2 or 3, wherein the bottom part (124) adheres to the vertical absorber system arranged above it by means of an embedded disc magnet (110). [5] Arrangement according to any one of claims 1 to 4, wherein the vertical absorber system is configured to absorb both compressive and tensile forces. [6] Arrangement according to one of claims 1 to 5, wherein the vertical absorber system for absorbing vertical oscillations and vibrations comprises a cone magnet (102, 208, 308, 408) and at least one ring magnet (104, 206, 306, 307, 406, 506, 507) which interact for damping according to the principle of magnetic attraction. [7] Arrangement according to claim 6, wherein the cone magnet (102, 208, 308, 408) is arranged in an upper part and the at least one ring magnet (104, 206, 306, 307, 406, 506, 507) is arranged in a lower part (120, 202, 302, 402). [8] Arrangement according to one of claims 1 to 7, which additionally comprises an actuating element (118). [9] Arrangement according to any one of claims 1 to 4, wherein a height adjustment device is provided. [10] Arrangement according to claims 8 and 9, wherein the adjusting part (118) in the lower part (120, 202, 302, 402) is height-adjustable by a rotary movement using a thread (130). [11] Arrangement according to one of claims 8 to 10, which is set up in such a way that a height adjustment can be carried out in the installed and partially loaded state. [12] Arrangement according to one of claims 1 to 11, wherein an additional counter magnet is provided for the purpose of increasing the load-bearing capacity. [13] Arrangement according to one of claims 1 to 12 and claim 2, wherein the bottom part (124) responsible for receiving the horizontally acting vibrations achieves an attractive effect towards the counter magnet by means of a disc magnet (110) in order to avoid a screw connection that inhibits function. [14] Arrangement according to one of claims 1 to 13 and claim 8, wherein the counter magnet is associated with the actuating part (118). [15] Arrangement according to one of claims 1 to 14 and claim 12, wherein the counter magnet is designed as a pot magnet (108).

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