Damping device for damping movement of movable part, in particular furniture part, window and / or door

Abstract

The invention relates to a damping device (1) for damping the movement of movable components, in particular furniture components, windows and / or doors, comprising a cylinder (3), a piston (5) which is guided in particular linearly in the cylinder (3) and which is damped by a damping fluid (4), and a piston rod (6) which is connected to the piston (5), the damping device (1), preferably the piston (5), comprising at least one flow channel (9) for the flow of the damping fluid (4), wherein the flow channel (9) has a flow cross-section (11), and the damping device (1) comprises at least one diaphragm (10) for adjusting the flow cross-section (11) for the flow of the damping fluid (4) in a damping stroke, and wherein the piston (5) and / or the at least one diaphragm (10) are / is designed in such a way that the flow cross-section (11) for the flow of the damping fluid (4) is adjusted in the damping stroke by means of a longitudinal movement of the piston (5) during the damping stroke. The piston (5) can be rotated relative to the at least one diaphragm (10) and / or the at least one diaphragm (10) can be rotated relative to the piston (5) and / or the at least one diaphragm (10) can be rotated within the cylinder (3).

Description

Technical Field

[0001] The invention relates to a damping device for damping the movement of movable parts, in particular furniture parts, windows and / or doors, the damping device having a cylinder, a piston which is guided in the cylinder, in particular linearly and damped by a damping fluid, and a piston rod connected to the piston, wherein the damping device, preferably the piston, comprises at least one flow channel for the flow of the damping fluid, wherein the flow channel has a flow cross section, and the damping device comprises at least one partition for adjusting the flow cross section for the flow of the damping fluid during the damping stroke. The invention also relates to the use of such a damping device. The invention also relates to furniture, doors or windows having at least one such damping device. Background Art

[0002] DE 20 2011 108 658 U1 already discloses a damping device which uses a volume-constant holding element in the form of a floating seal with a groove control device in the return flow region of the damping fluid in order to achieve a groove design adapted to the volume change caused by the sealing element and a uniform damping characteristic. The groove can generate a volume flow that changes for different operating positions, so that, depending on the piston displacement, the magnitude of the damping force provided by the damping device can be higher at the beginning of damping than at the end of damping.

[0003] A disadvantage of the prior art is that during the damping stroke, the sealing element also moves on the groove with a variable cross section, so that only a small braking power is caused in the area of ​​the groove with a large cross section. In addition, the damping device with a given groove cross section cannot be flexibly adjusted to the changing actual conditions of the furniture, because different sizes of movable furniture parts, different movement paths and / or movement processes lead to changing damping characteristics. In particular, for each specific requirement in use and each specific piece of furniture, the damping device must be individually adjusted by means of the structural design, for example the geometry of the groove. In addition, in particular when the piston speed changes, in addition to a uniform damping characteristic, no adaptation to the desired speed characteristic curve of the damping device is carried out. Summary of the invention

[0004] The objective technical object of the present invention is therefore to provide a damping device which is improved compared to the prior art, in which the disadvantages of the prior art are at least partially eliminated and which is distinguished in particular by a high and / or constant damping capacity over the entire damping stroke.

[0005] This object is achieved by the features of claim 1 .

[0006] Therefore, according to the present invention, it is provided that the piston and / or at least one partition plate are constructed in such a way that during the damping stroke, via the longitudinal movement of the piston, the piston can rotate relative to the at least one partition plate and / or the at least one partition plate can rotate relative to the piston and / or the at least one partition plate can rotate within the cylinder body.

[0007] This makes it possible, firstly, to adapt the damping capacity to the speed of the piston without requiring a groove in the cylinder which would undesirably impair the damping properties over the damping stroke.

[0008] By rotating, at least one partition can partially cover at least one flow channel in order to reduce the throughflow cross section. For example, at the beginning of the damping stroke, at least one partition opening and at least one flow channel are congruent, wherein during the damping stroke the damping cross section is reduced, preferably reduced to zero, in particular in order to adjust the damping power during the damping process.

[0009] Positive properties are obtained in that the flow cross section for the damping fluid can be adapted to the desired damping properties by the interaction of at least one partition with at least one flow channel of the piston and / or the flow through of the damping fluid can be adjusted during the damping stroke. For example, starting from the starting point of the damping stroke, in which a high speed of the piston is generally present, to the operating position in the region of the end point of the damping stroke, in which a low speed of the piston is generally expected, at least one partition can cover at least one flow channel to a greater extent, so that the flow cross section is preferably gradually reduced for the damping.

[0010] It is particularly preferably provided that during the damping stroke, via the longitudinal movement of the piston and through a device, the piston can rotate relative to at least one partition and / or at least one partition can rotate relative to the piston and / or at least one partition can rotate within the cylinder, thereby reducing the flow cross section, the device being separated from at least one partition and the damping fluid and used to rotate the at least one partition.

[0011] Preferably, at least one partition comprises a partition opening for the flow of the buffer fluid. However, this is generally not mandatory. During the buffer stroke, at least one partition can completely, partially and / or not cover at least one flow channel in order to adjust the flow of the buffer fluid through the piston.

[0012] Preferably, during the damping stroke, at least one web is arranged in the throughflow direction of the damping fluid in front of the piston, particularly preferably on the end side of the piston.

[0013] Particularly preferably, the piston comprises at least one flow channel, wherein it is also conceivable in general that the at least one flow channel is formed by the region between the piston and the cylinder and is partially covered by the at least one intermediate wall during the damping stroke.

[0014] For example, during the buffer stroke, the groove in the cylinder can also be reduced and / or increased in cross section by at least one partition. In general, in addition to the flow channel in the piston, there can also be a groove, which is partially covered by at least one partition during the buffer stroke.

[0015] Preferably, the flow channel is configured such that during the damping stroke, the damping fluid flows through or through the area in front of the piston into the area behind the piston or inside the piston in the flow direction. The damping fluid can generally be present in liquid form or as a gas.

[0016] As stated at the outset, protection is also claimed for the use of such a damping device in furniture parts, doors and / or windows.

[0017] The damping device offers the advantage that a damping stroke can be achieved over a large angular range of the component to be damped. Conventional damping devices are designed for damping a short area in the range of about 20° in front of the closed position. In contrast, the damping device according to the invention can damp an angular range of more than 90°, wherein the increased forces required for moving the component can be reduced, in particular by the interaction between at least one control partition and at least one flow channel; for example, the damping device can be rendered essentially inactive by the damping cross section. As a result, the user of the component generally preferably does not have to operate the damping device within a defined angular range, wherein the area in front of the closed position can be effectively damped, preferably depending on the speed of the piston.

[0018] As explained at the outset, protection is also claimed for a piece of furniture having at least one such buffer device, a door having at least one such buffer device and a window having at least one such buffer device, wherein a movable furniture part relative to the furniture body, a door relative to a door frame or a window relative to a window frame can be buffered between an open position and a closed position by means of at least one buffer device.

[0019] Here, at least one damping device can be used externally as an additional component for retrofitting and / or as an integrated structural component. For example, at least one damping device can be integrated in a furniture fitting, a window fitting or a door fitting.

[0020] Advantageous embodiments of the invention are defined in the dependent claims.

[0021] Preferably, the buffering device is suitable for furniture accessories or building accessories and comprises a cylinder body, in which a buffer fluid is arranged, wherein the piston can be moved at a speed through the buffer fluid during the buffer stroke, wherein at least one flow channel with a flow cross section is provided, through which the buffer fluid can pass through the piston during the buffer stroke, wherein at least one adjusting piston is provided, which is movably, preferably displaceably supported in and / or at the piston, wherein the flow cross section of the flow channel can be changed by moving the adjusting piston relative to the piston, wherein at least one accumulator, preferably a return spring, is provided, which loads the adjusting piston with a return force relative to the piston, and the return force resists at least one flow force that can be applied to the adjusting piston by the buffer fluid during the buffer stroke.

[0022] Preferably, at least one flow channel with a flow cross section is provided, through which a damping fluid can pass through the piston during a damping stroke, characterized in that at least one regulating piston is provided, which is movably, preferably displaceably supported in and / or on the piston, wherein the flow cross section of at least one flow channel can be changed by moving the at least one regulating piston relative to the piston, wherein at least one accumulator, preferably a return spring, is provided, which loads the regulating piston with a return force relative to the piston, the return force counteracting at least one flow force that can be applied to the at least one regulating piston by the damping fluid during the damping stroke, wherein at least one control diaphragm is provided, at which a pressure drop proportional to the flow force and to the speed of the piston is achieved, wherein a rated speed for the piston (5) is preset in relation to the position of the piston relative to the cylinder, wherein the at least one regulating piston can move relative to the piston against the return force when the speed of the piston is greater than the rated speed, i.e., such that the flow cross section of the at least one flow channel can be reduced, preferably wherein the rated speed for the piston in relation to the position of the piston relative to the cylinder

[0023] - presetting by at least one further force accumulator, particularly preferably a spring, which acts against the restoring force on at least one control piston, and / or

[0024] - presetting by means of the adjustability of the partition opening of at least one control partition, and / or

[0025] The provision is made by at least one groove in the inner wall of the cylinder having a varying groove cross section.

[0026] It is particularly preferred that at least one control diaphragm is provided, at which a pressure drop is achieved which is proportional to the flow force and to the speed of the piston, wherein a rated speed for the piston is preset in relation to the position of the piston relative to the cylinder body, wherein the regulating piston can move relative to the piston against a restoring force when the speed of the piston is greater than the rated speed, i.e., such that the flow cross-section of the flow channel can be reduced, preferably wherein the rated speed for the piston in relation to the position of the piston relative to the cylinder body is preset by at least one spring (which loads the regulating piston against the restoring force) and / or by the adjustability of a diaphragm opening of at least one control diaphragm and / or by at least one groove with a variable groove cross-section in the inner wall of the cylinder body.

[0027] According to an advantageous embodiment of the invention, the piston comprises at least two, preferably exactly two, flow channels, wherein it is preferably provided that the at least two flow channels are arranged symmetrically on the end side of the piston.

[0028] The symmetrical arrangement allows the structural component (such as the piston) to be loaded symmetrically, thereby increasing the service life of the damping device and / or preventing the structural component (such as the piston) from tilting in the cylinder. If a plurality of flow channels are present, these flow channels can be arranged at the end side of the piston at a distance from the axis of symmetry of the piston, and when the piston or at least one partition rotates, the flow cross section can be closed and / or opened in a defined manner by the at least one partition.

[0029] It is advantageously provided that at least one flow channel is arranged on an end side of the piston and / or at least one intermediate wall is arranged on the end side of the piston.

[0030] As a result, the damping fluid can flow directly into the piston in the center, without requiring lateral openings at the piston, through which the damping fluid can flow from the area in front of the piston into the area behind the piston and / or possibly through a sealing element. In general, during the damping stroke, the fluid chamber in the area in front of the piston decreases due to the movement of the piston, while the fluid chamber in the area behind the piston increases accordingly.

[0031] It is particularly preferably provided that the piston and the at least one intermediate plate are designed to be motionally coupled to one another in the longitudinal direction during the damping stroke and / or to be rotationally decoupled from one another during the damping stroke.

[0032] A longitudinal movement of the piston and / or of the at least one intermediate plate along the axis of the damping device can bring about a rotational movement of the piston and / or of the at least one intermediate plate.

[0033] According to an advantageous embodiment of the invention, it is provided that the throughflow cross section can be varied by rotating the piston relative to at least one intermediate plate and / or by rotating at least one intermediate plate relative to the piston.

[0034] It has proven to be advantageous that the damping device comprises a hollow piston rod, which is preferably separated from the piston rod, via which the piston can be rotated relative to at least one partition plate, wherein it is preferably provided that the hollow piston rod is particularly preferably arranged directly on the piston and / or that the hollow piston rod is guided via a particularly preferably arranged and / or twisted sliding groove track on the cylinder body.

[0035] In general, during the damping stroke, the piston can be guided in the cylinder in a rotationally stationary manner while at least one partition rotates, or during the damping stroke, at least one partition can be guided in the cylinder in a rotationally stationary manner while the piston rotates, wherein an overlap of the two rotational movements is also conceivable.

[0036] The hollow piston rod is preferably arranged between the cylinder and the piston on the side of the end face of the piston facing away from the piston, wherein during the damping stroke the hollow piston rod is guided along a sliding path in order to move the piston relative to the partition. For example, the sliding path can be implemented as a groove in the cylinder, along which the hollow piston rod moves, wherein during the longitudinal movement of the piston, a torsion can cause a rotational movement.

[0037] In general, the piston and the at least one intermediate plate can be designed to be coupled to one another in longitudinal motion, so that during the damping stroke the at least one intermediate plate moves together with the piston in longitudinal direction along the axis of the damping device.

[0038] An advantageous variant of the invention is that the buffer device comprises a magnet, preferably a rod magnet and / or a permanent magnet, via which at least one partition can be rotated relative to the piston, wherein it is preferably provided that the magnet is particularly preferably arranged directly at at least one partition and / or the magnet can be rotated via at least one metal belt, particularly preferably a steel belt, which is particularly preferably arranged at the cylinder body.

[0039] Due to the magnetic interaction between the magnet and the metal strip located on the cylinder, at least one partition can rotate when the at least one partition moves longitudinally in the cylinder in order to reduce (during buffering) and / or increase (during resetting of the buffer device) the flow cross section.

[0040] It is particularly preferably provided that at least two metal strips are provided and / or that at least one metal strip is arranged in a twisted manner on the cylinder.

[0041] Two metal strips have proven to be particularly suitable for rotating the rod magnet, which can be guided along the metal strip on the cylinder along a torsion section (on the inner circumference of the cylinder with an angular range that changes in the longitudinal direction for rotating at least one partition) .

[0042] In one embodiment of the present invention, it is provided that the buffer device includes a spring for loading a force on the piston, the spring being arranged at at least one partition, wherein the at least one partition can rotate relative to the piston via the spring, wherein it is preferably provided that the spring is fixedly connected to the at least one partition, and / or the at least one partition can rotate via compression of the spring.

[0043] If the spring is compressed at the fixed free end, this compression automatically causes a rotation of the other free end of the spring. This inherent rotation during the compression process can be used to rotate at least one partition arranged at the spring during the damping stroke. For example, the degree of rotation can be adapted to the desired degree via the spring length, the spring cross section or the spring diameter.

[0044] According to a preferred embodiment of the present invention, it is provided that the buffer device includes an impeller, through which at least one partition can rotate relative to the piston, wherein it is preferably provided that the impeller is particularly preferably arranged directly at at least one partition and / or can be rotated by the flow of buffer fluid and / or includes at least two, particularly preferably four blades.

[0045] Particularly preferably, the blades are inclined in the longitudinal direction of the damping device, so that a rotation of the at least one partition arranged on the impeller can be generated by the flow of damping fluid through the at least one partition into the piston and / or vice versa.

[0046] It is further preferably provided that the buffer device comprises at least one telescopic device, by means of which at least one partition can be rotated relative to the piston, wherein it is preferably provided that at least one telescopic device can be rotated via a guide which is particularly preferably twisted and / or arranged on the cylinder body, and / or comprises a plurality of telescopic parts which can be telescoped in and relative to each other.

[0047] The telescopic device is preferably arranged on the side facing the end side of the piston and between the cylinder body at at least one intermediate plate. For example, the guide can be designed as a twisted guideway on the cylinder body and / or the telescopic device so that the intermediate plate is rotated together via the telescopic device during the damping stroke. The telescopic device can be compressed in the longitudinal direction during the damping stroke and can be transferred into the starting position during the resetting of the damping device.

[0048] The arrangement and structural design and positioning of the hollow telescopic rod can be applied in the telescopic device, and vice versa.

[0049] In a further embodiment, it can be provided that the sealing device comprises a sealing element, wherein the sealing element is designed as a braking element and / or acts in parallel to the at least one flow channel in the throughflow direction and / or acts in series with the at least one flow channel in the throughflow direction.

[0050] In principle, the sealing element can be designed to prevent the flow of damping fluid between the cylinder and the outside of the piston, so that the damping device is completely blocked when the flow channel is completely covered by the at least one partition. However, the sealing element can also allow small amounts of damping fluid to pass through, so that the sealing element acts as a braking element and / or produces damping even when the flow channel is completely closed.

[0051] According to an advantageous design of the invention, the piston comprises a power valve in the form of a regulating piston, wherein a flow cross section and / or a further flow cross section of a fluid outlet opening of the piston can be varied by means of the power valve, wherein it is preferably provided that the power valve acts in parallel and / or in series with a sealing element and / or at least one partition plate which may be present.

[0052] If the power valve is connected in parallel with at least one diaphragm and / or a brake element, the flow through the brake element and / or at least one diaphragm can act as a regulating pressure for the power valve, wherein a buffer device is provided in the sense of a bypass line, which can be switched at the buffer device preferably between two operating positions (active buffering and suppressed buffering caused by at least one flow channel).

[0053] The power valve can adapt the damping effect of the damping device in such a way that the speed of the piston is adapted to the desired reference speed, wherein an increased damping effect is produced at the beginning of the damping stroke (when a high piston speed occurs), which decreases until the end of the damping stroke (when a low piston speed is desired). The desired reference speed can be a linear curve of the speed over the damping displacement, wherein generally other reference speed curves are also possible. Thus, during the damping stroke, the damping effect can be produced in a displacement-dependent and speed-dependent manner as a function of the desired reference speed.

[0054] It is particularly preferably provided that the regulating piston is arranged on the outside of the piston and / or inside the piston, wherein it is preferably provided that at least one regulating piston is preloaded relative to the piston by means of a regulating piston spring and / or that the piston can be loaded with force by means of a spring that may be present and / or that the power valve is constructed as a pressure balance.

[0055] The regulating piston can, by functioning as a pressure balance, bring about a pressure difference at the piston, wherein the flow cross section and / or a further flow cross section at at least one flow channel and / or at the fluid outlet opening is reduced or increased as a function of the pressure difference present at the piston. The regulating piston can thus function as a pressure balance, wherein preferably, during the damping stroke, damping fluid flows permanently through the piston.

[0056] It is particularly preferably provided that the damping device comprises a fluid chamber which is filled with a damping fluid and which is delimited at least by the cylinder, a sealing element which may be present, the piston and / or the piston rod.

[0057] According to a preferred embodiment, the buffer device includes a volume constant maintaining element which maintains a constant volume for the buffer fluid in the fluid chamber in each position of the piston together with the piston rod, and / or wherein a sealing element together forms the volume constant maintaining element and can move relative to the cylinder body and is loaded with force on the side of the sealing element facing away from the fluid chamber, preferably by a spring if any.

[0058] According to a particularly preferred embodiment, it is provided that at least one intermediate plate and the piston are rotatable relative to one another in such a way that the flow cross section can be reduced during the damping stroke, preferably in the longitudinal direction as a function of the piston travel and / or speed.

[0059] Thus, during the damping stroke, the damping power can be adapted to the desired damping effect, wherein the damping power can be adjusted as a function of the axial position of the piston and / or the speed of the piston in the cylinder so as to enable automatic adjustment of the speed of the movable part to a desired reference speed, in particular via a power valve if present. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] Further details and advantages of the invention are explained in more detail below with reference to the accompanying drawings, which illustrate embodiments of the invention.

[0061] Figure 1 A damping device according to a preferred embodiment is shown in perspective, cross-sectional and enlarged detail sections, in which a relative rotation is produced between the partition and the piston via a rod magnet.

[0062] Figure 2 shows the buffer stroke according to Figure 1 A buffer device of an embodiment,

[0063] Figures 3a to 3d The exploded view, perspective view and front view show the Figure 1The partition plate and the rod-shaped magnet of the buffer device of the embodiment of the present invention are shown in the front view, and the rod-shaped magnet is hidden in three different positions along the buffer stroke.

[0064] Figures 4a to 4c The three-dimensional diagram, the front view and the cross-sectional diagram respectively show the buffer stroke at different positions according to the Figure 3a The embodiment of the buffer device has a partition,

[0065] Figure 5 A damping device according to another preferred embodiment is shown in a perspective sectional view with an enlarged detail section and in a sectional view from the side with an enlarged detail section, wherein the rotation is generated via a spring,

[0066] Figure 6 shows the buffer stroke according to Figure 5 A buffer device of an embodiment,

[0067] Figure 7a , 7b Shown according to Figure 5 A damping device in two different positions during the damping stroke of an embodiment of the present invention, wherein the spring is hidden,

[0068] Figure 8 A perspective sectional view with an enlarged detail section and a sectional view from the side with an enlarged detail section show a damping device according to another preferred embodiment, wherein the rotation is generated via a telescopic device,

[0069] Fig. 9 shows the buffer stroke according to Figure 8 A buffer device of an embodiment,

[0070] Figures 10a to 10c The embodiment of the invention is shown in a side view before and after the damping stroke, in an exploded view and a perspective view before the damping stroke, and in a perspective view after the damping stroke. Figure 8 The embodiment of the telescopic device of the buffer device,

[0071] Fig.11 A damping device according to another preferred embodiment is shown in a perspective view and in an exploded view, wherein the rotation is generated via an impeller.

[0072] Fig.12a , 12b The three-dimensional cross-sectional view shows the buffer stroke before and during the Fig.11 A buffer device of an embodiment,

[0073] Fig.13a , 13b The cross-sectional view from the side shows the following diagram before and during the buffer stroke: Fig.11 A buffer device of an embodiment,

[0074] Fig.14 A damping device having a power valve in the form of a translationally movable regulating piston is shown in a perspective view with an enlarged detail section. DETAILED DESCRIPTION

[0075] Figure 1 A damping device 1 for damping the movement of a movable component, such as a furniture component, a window or a door, is shown, which has a cylinder 3 , a piston 5 linearly guided in the cylinder 3 and damped by a damping fluid 4 , and a piston rod 6 connected to the piston 5 .

[0076] The piston 5 and the intermediate plate 10 are designed such that the intermediate plate 10 can rotate relative to the piston 5 in the cylinder 3 (via the longitudinal movement of the piston 5 during the damping stroke) when the piston 5 moves relative to each other in the cylinder 3 .

[0077] Figure 2 and Figure 1 The only difference is that, for the purpose of damping, the piston rod 6 penetrates further into the cylinder 3 , whereby the partition plate 10 rotates relative to the piston 5 .

[0078] In order to rotate the intermediate plate 10 , the damping device 1 comprises a magnet 15 in the form of a permanent magnet in the form of a rod magnet, by which the intermediate plate 10 can be rotated relative to the piston 5 during the damping stroke.

[0079] The magnet 15 is arranged directly on the partition 10, wherein the magnet 15 can be rotated via two metal belts 16 arranged on the cylinder 3 in the form of twisted steel belts. The belts 16 are arranged on the outside of the cylinder 3, wherein the belts 16 can generally also be arranged on the inner circumference of the cylinder 3. The number of belts 16 is generally arbitrary, wherein the number is preferably set to be the same as the number of free ends of the magnets 15.

[0080] In general, a kinematic reversal of the rotation is also possible, wherein the piston 5 rotates relative to the intermediate plate 10 when the piston 5 moves in the cylinder 3. This can be provided, for example, in a preferred embodiment, in which the rotation of the damping device 1 is generated by a hollow piston rod, wherein the piston 5 can be rotated relative to the intermediate plate 10 by the hollow piston rod. The hollow piston rod can be arranged directly on the piston 5 and guided, for example, via a twisted sliding guide rail arranged on the cylinder 3 (a kinematic mechanism with forced guidance along the sliding guide rail similar to the twisted belt 16).

[0081] Figure 3a An exploded view of structural components interacting with a diaphragm 10 of a damping device in an embodiment with magnets 15 is shown.

[0082] The damping power is generated in the damping device 1 via the interaction between the partition 10 and the piston 5, which is given as a function of the speed difference between the actually existing speed of the piston 5 and the desired reference speed of the piston 5. For this purpose, the piston 5 comprises at least one flow channel 9 for the flow of the damping fluid 4, wherein the flow channel 9 has a flow cross section 11, and the damping device 1 comprises a partition 10 for adjusting the flow cross section 11 for the flow of the damping fluid 4 during the damping stroke via a relative rotation between the partition 10 and the piston 5.

[0083] Figure 3b to Figure 3d Different web positions along the damping stroke are shown, wherein the flow cross section 11 is changed by the magnet 15 (hidden in the illustration). By rotating the web 10 relative to the piston 15, the flow cross section 11 can be enlarged or reduced, so that the damping capacity can be adapted.

[0084] The piston 5 comprises exactly two flow channels 9, wherein the two flow channels 9 are arranged symmetrically on the end side 12 of the piston 5. The number of flow channels 9 is generally arbitrary.

[0085] The partition wall 10 is arranged on the end side 12 of the piston 5 , although this is not necessarily necessary if the flow channel 9 is arranged on the end side 12 .

[0086] The piston 5 and the at least one intermediate plate 10 are designed to be motionally coupled to one another in a longitudinal direction 32 during a damping stroke and to be decoupled from one another in a rotational direction 33 during a damping stroke.

[0087] Figures 4a to 4c A motion coupling between the diaphragm 10 and the piston 5 in the longitudinal direction is shown, while there is a relative rotation orthogonal to the longitudinal direction of the damping device 1 .

[0088] from Figure 4b Starting from the relative positioning in Figure 4a The flow cross section 11 in is changed by the rotation of the piston 5 relative to the partition 10 (in the case of an active movement of the partition 10 in the direction of rotation). Figure 4c In the embodiment, the flow cross section 11 for the buffer fluid 4 is Figure 4b Significantly smaller in comparison.

[0089] Figure 5 Another possibility for rotating between the partition 10 and the piston 5 in order to change the throughflow cross section 11 by rotation is shown, wherein a spring 17a is provided for the rotation. The spring 17a can be, for example, a return spring which is present anyway in the damping device 1 and serves to adjust the throughflow cross section 11 via the partition 10 in a dual-functional sense.

[0090] As can be seen in two enlarged detail sections of the sectional view, the damping device 1 comprises a spring 17a for applying a force to the piston 5, which is arranged directly (also conceivably indirectly) on the partition 10. The compression of the spring 17a automatically causes a rotation of the free end of the spring 17a arranged on the partition 10, wherein the partition 10 is rotated relative to the piston 5 by the spring 17a in order to adapt the throughflow cross section 11 to the desired damping power.

[0091] In the present embodiment, the spring 17 a is fixedly connected to the partition 10 , and the partition 10 can be rotated by compression of the spring 17 a , wherein in general, the spring 17 a can also be arranged on the piston 5 as an alternative or in addition to rotating the piston 5 .

[0092] Figure 6 and Figure 5 The only difference is that the piston 5 moves in the cylinder 3 in the direction of the damping stroke, whereby the throughflow cross section 11 is changed via the spring 17 a.

[0093] To illustrate the rotation of the diaphragm 10 relative to the piston 5 caused by the spring 17a, Figure 7a and Figure 7b FIG. 2 shows two different rotational positions of the partition 10 with the spring 17 a omitted, in which the flow cross sections 11 are different.

[0094] The spring 17a provided for the rotation of the partition 10 is fixedly fastened on the inner side of the cylinder body 3 with its free end position, so that when the spring 17a is compressed, the rotational movement is transmitted to the partition 10 (through the connection between the spring 17a and the partition 10) to adjust the flow cross-section 11 of the flow channel 9 for the piston 9.

[0095] Figure 8 A further embodiment of a damping device 1 is shown, wherein the damping device 1 comprises a telescopic device 20 , by means of which the partition plate 10 can be rotated relative to the piston 5 .

[0096] The telescopic device 20 is supported at the end on the inner side of the cylinder 3, wherein a guide 21 twisted along the circumference is used for rotation in interaction with a guide pin. The telescopic device 20 is arranged inside the return spring 17, wherein an arrangement outside the spring 17 and a damping device 1 without the spring 17 are possible.

[0097] By fastening the telescopic device 20 at the end of the cylinder 3 (similar to when the diaphragm 10 is rotated via the spring 17), a fixed point is provided for the rotation of the diaphragm 10 during the retraction movement (through the motion coupling between the diaphragm 10 and the telescopic device 20) during the buffer stroke.

[0098] Fig. 9 and Figure 8The only difference is that the damping device 1 is moved along the damping path, so that the telescopic device 20 is in the retracted position, in which the throughflow cross section 11 changes.

[0099] Fig.10a It is shown that, in order to rotate the partition 10 via the telescopic device 20 , the telescopic device 20 comprises three telescopic elements 22 which can be telescoped in and relative to each other and which are presented in an extended and retracted state.

[0100] exist Fig.10b 2 shows the structural components of the telescopic device 20 in an exploded view and in the assembled state, wherein the spring 17 supports the telescopic process but is generally not absolutely necessary.

[0101] exist Fig.10c In FIG. 2 , the telescopic device 20 is in a completely retracted state, in which the partition 10 is generally rotated to the maximum extent relative to the piston 5 relative to the initial position.

[0102] Fig.11 A further embodiment of the damping device 1 is shown in an exploded view and in the assembled state, in which an impeller 18 is used to rotate the partition wall 10 .

[0103] In accordance with Fig.12a and Figure 12b It can be seen in two positions along the damping stroke that during the damping movement, the partition 10 is rotated relative to the piston 5 by the impeller 18. In the present example, for this purpose, the impeller 18 is arranged directly on the partition 10 and can be rotated by the flow of the damping fluid 4, wherein a plurality of blades 19 are provided, which can cause the partition 10 to rotate by the damping fluid 4 flowing through.

[0104] The impeller 18 functions like a turbine, wherein a meshing motion is generated between the damping fluid 1 and the blades 19 for rotating the diaphragms.

[0105] Fig.13a and Fig.13b and Fig.12a , Figure 12b The difference is only the change in the viewing angle of the cross-sectional view. Generally speaking, a sealing element 7 can be provided, through which the piston rod 6 moves. The damping device 1 includes a sealing element 7, wherein the sealing element 7 is configured as a brake element 23 and acts in series with the flow channel 9 in the flow direction of the damping fluid 4.

[0106] In general, it can also be provided that the sealing element 7 in the form of the braking element 23 acts in parallel with the flow channel 9 in the throughflow direction.

[0107] like Fig.14As can be seen in the figure, in addition to the rotation of the partition 10 (in all embodiments), the piston 3 can also include a power valve 24 in the form of an adjusting piston 25, wherein the flow cross-section 11 or a further flow cross-section of the fluid outlet opening of the piston 5 can be changed by the power valve 24, wherein the power valve 24 acts in parallel or in series with the sealing element 7 or the partition 10.

[0108] The regulating piston 25 can be arranged on the outside of the piston 5, wherein in the present embodiment, the regulating piston 25 is arranged inside the piston 5, wherein the regulating piston 25 is preloaded relative to the piston 5 by means of a regulating piston spring 28, and the piston 5 can be loaded with force by means of a spring 17. Thus, the power valve 24 is designed as a pressure balance 29. The power valve 24 can be arranged on the damping device 1 via the rotatably movable partition 10 and the other power valve 24 can be arranged via the regulating piston 25.

[0109] The damping device 1 comprises a fluid chamber 8 which is filled with a damping fluid 4 and is delimited by a cylinder 3 , a sealing element 7 , a piston 5 and a piston rod 6 .

[0110] The damping device 1 comprises a constant volume holding element 30 which in each position of the piston 5 together with the piston rod 6 holds the volume of the damping fluid 4 in the fluid chamber 8 constant and is loaded with force on a side 31 of the constant volume holding element facing away from the fluid chamber by means of a spring 17. The sealing element 7 can be designed to be movable relative to the cylinder 3 and / or to jointly form the constant volume holding element 30, but this is generally not necessary.

[0111] With the partitions of the partitions 10 described above, the piston 5 can be designed to be rotatable relative to the partition 10 in such a way that the flow cross section 11 can be reduced in the longitudinal direction during the damping stroke in a manner dependent on the displacement of the piston 5 and / or dependent on the speed.

[0112] According to the present invention, a buffer device 1 can be applied to a movable furniture part, door or window, wherein, for example, the furniture, door or window can be equipped with a buffer device 1 so as to buffer the movable furniture part, door or window between an open position and a closed position relative to the furniture body, door frame or window frame via the buffer device 1.

[0113] The damping device 1 is suitable for furniture fittings or building fittings, wherein the piston 5 can be moved at a speed by a damping fluid during a damping stroke, wherein a flow channel with a flow cross section is provided, through which the damping fluid can pass through the piston 5 during the damping stroke. In general, an adjusting piston 25 is provided in all embodiments, which is displaceably supported in or on the piston 5, wherein the flow cross section of the flow channel can be changed by moving the adjusting piston 25 relative to the piston 5.

[0114] A force accumulator 28 in the form of a restoring spring acts on the control piston 25 relative to the piston 5 with a restoring force which counteracts at least one flow force which can be exerted on the control piston 25 by the damping fluid during the damping stroke.

[0115] A control diaphragm is provided at which a pressure drop is achieved which is proportional to the flow force and to the speed of the piston 5, wherein a rated speed for the piston 5 is preset which is related to the position of the piston 5 relative to the cylinder 3, wherein the regulating piston 25 can move relative to the piston 5 against the restoring force when the speed of the piston 5 is greater than the rated speed, i.e., so that the flow cross section of the flow channel can be reduced.

[0116] The rated speed for the piston 5, which is related to the position of the piston 5 relative to the cylinder 3, can be preset, for example, by a spring (which loads the regulating piston 25 against the restoring force), by the adjustability of the partition opening of the control partition, or by a groove with a variable groove cross-section in the inner wall of the cylinder.

Claims

1. A damping device (1) for damping the movement of a movable part, in particular a furniture part, a window and / or a door, comprising: - cylinder body (3), a piston (5) which is guided in the cylinder (3), in particular linearly, and which is damped by a damping fluid (4), and - a piston rod (6) connected to the piston (5), in, The damping device (1), preferably the piston (5), comprises at least one flow channel (9) for the damping fluid (4) to flow through, wherein the flow channel (9) has a flow cross section (11), and the damping device (1) comprises at least one partition (10) for adjusting the flow cross section (11) for the flow of the damping fluid (4) during the damping stroke, characterized in that the piston (5) and / or the at least one partition (10) are constructed such that during the damping stroke, via the longitudinal movement of the piston (5), the piston (5) can rotate relative to the at least one partition (10) and / or the at least one partition (10) can rotate relative to the piston (5) and / or the at least one partition (10) can rotate within the cylinder (3).

2. The buffer device (1) according to claim 1, wherein: The piston (5) comprises at least two, preferably exactly two, flow channels (9), wherein it is preferably provided that the at least two flow channels (9) are arranged symmetrically on an end side (12) of the piston (5).

3. A buffer device (1) according to claim 1 or 2, wherein the at least one flow channel (9) is arranged at the end side (12) of the piston (5), and / or the at least one partition plate (10) is arranged at the end side (12) of the piston (5).

4. A buffer device (1) according to any of the preceding claims, wherein the piston (5) and the at least one partition plate (10) are configured to be motionally coupled to each other in a longitudinal direction (32) during a buffer stroke and / or to be decoupled from each other in a rotational direction (33) during a buffer stroke.

5. A buffer device (1) according to any of the preceding claims, wherein the flow cross section (11) can be changed by rotating the piston (5) relative to the at least one partition (10) and / or rotating the at least one partition (10) relative to the piston (5).

6. A buffer device (1) according to any one of the preceding claims, wherein the buffer device (1) comprises a hollow piston rod, through which the piston (5) can rotate relative to the at least one partition (10), wherein it is preferably provided that the hollow piston rod is particularly preferably arranged directly on the piston (5), and / or the hollow piston rod is guided via a particularly preferably arranged and / or twisted sliding groove track on the cylinder body (3).

7. A buffer device (1) according to any one of the preceding claims, wherein the buffer device (1) comprises a magnet (15), preferably a rod magnet and / or a permanent magnet, through which the at least one partition (10) can rotate relative to the piston (5), wherein it is preferably arranged that the magnet (15) is particularly preferably arranged directly at the at least one partition (10), and / or the magnet (15) can rotate via at least one metal belt (16), particularly preferably a steel belt, which is particularly preferably arranged at the cylinder body (3).

8. The damping device (1) according to claim 7, wherein at least two metal strips (16) are provided and / or the at least one metal strip (16) is arranged in a twisted manner on the cylinder (3).

9. A buffer device (1) according to any one of the preceding claims, wherein the buffer device (1) comprises a spring (17a) for loading force onto the piston (5), the spring being arranged at the at least one partition (10), wherein the at least one partition (10) is capable of rotating relative to the piston (5) via the spring (17a), wherein it is preferably arranged that the spring (17a) is fixedly connected to the at least one partition (10), and / or the at least one partition (10) is capable of rotating via compression of the spring (17a).

10. A buffer device (1) according to any of the preceding claims, wherein the buffer device (1) comprises an impeller (18), through which the at least one partition (10) can rotate relative to the piston (5), wherein it is preferably arranged that the impeller (18) is particularly preferably arranged directly at the at least one partition (10) and / or can be rotated via the flow of a buffer fluid (4) and / or comprises at least two, particularly preferably four blades (19).

11. A buffer device (1) according to any one of the preceding claims, wherein the buffer device (1) comprises at least one telescopic device (20), through which the at least one partition (10) can rotate relative to the piston (5), wherein it is preferably arranged that the at least one telescopic device (20) can rotate via a guide part (21) that is particularly preferably twisted and / or arranged on the cylinder body (3) and / or comprises a plurality of telescopic parts (22) that can be telescopic within each other and / or can be telescopic relative to each other.

12. The cushioning device (1) according to any one of the preceding claims, wherein the cushioning device (1) comprises a sealing element (7), wherein the sealing element (7) - configured as a brake element (23) and / or - acts parallel to the at least one flow channel (9) in the through-flow direction, and / or - acts in series with the at least one flow channel (9) in the through-flow direction.

13. A buffer device (1) according to any of the preceding claims, wherein the piston (3) comprises a power valve (24) in the form of an adjusting piston (25), wherein the flow cross-section (11) and / or a further flow cross-section of the fluid outlet opening of the piston (5) can be changed by means of the power valve (24), wherein it is preferably arranged that the power valve (24) acts in parallel and / or in series with a sealing element (7) and / or the at least one partition (10) if any.

14. A buffer device (1) according to claim 13, wherein the regulating piston (25) is arranged on the outside of the piston (5) and / or inside the piston (5), wherein it is preferably provided that the at least one regulating piston (25) is prestressed relative to the piston (5) by means of an regulating piston spring (28), and / or the piston (5) can be loaded with force by means of a spring (17) if any, and / or the power valve (24) is constructed as a pressure balance (29).

15. A buffer device (1) according to any of the preceding claims, wherein the buffer device (1) comprises a fluid chamber (8) filled with a buffer fluid (4), the fluid chamber being delimited at least by the cylinder body (3), a sealing element (7) if any, the piston (5) and / or the piston rod (6).

16. A damping device (1) according to any one of claims 12 to 14 and 15, wherein the damping device (1) comprises a volume constant maintaining element (30) which keeps the volume provided for the damping fluid (4) in the fluid chamber (8) constant in any position of the piston (5) together with the piston rod (6), and / or wherein, The sealing element (7) together forms the volume-constant maintaining element (30) and is movable relative to the cylinder (3) and is acted upon by a force on the side (31) of the sealing element facing away from the fluid chamber, preferably by a possibly present spring (17).

17. A buffer device (1) according to any of the preceding claims, wherein the at least one partition (10) and the piston (5) are constructed to be able to rotate relative to each other in such a way that during the buffer stroke, the flow cross-section (11) can be reduced, preferably in the longitudinal direction, in relation to the displacement of the piston (5) and / or in relation to the speed.

18. The buffer device (1) according to any one of the preceding claims, wherein During the damping stroke, via the longitudinal movement of the piston (5) and through a device, the piston (5) can rotate relative to the at least one baffle (10) and / or the at least one baffle (10) can rotate relative to the piston (5) and / or the at least one baffle (10) can rotate within the cylinder (3), thereby reducing the flow cross section (11). The device is separated from the at least one baffle (10) and the damping fluid (4) and is used to rotate the at least one baffle (10).

19. Use of a cushioning device (1) according to any of the preceding claims in a furniture component, a door and / or a window.

20. A piece of furniture having at least one damping device (1) according to any one of claims 1 to 18, wherein a furniture part that can be moved relative to the furniture body can be damped between an open position and a closed position by the at least one damping device (1).

21. A door having at least one damping device (1) according to any one of claims 1 to 18, wherein the door can be damped relative to a door frame between an open position and a closed position by means of the at least one damping device (1).

22. A window having at least one damping device (1) according to any one of claims 1 to 18, wherein the window can be damped relative to the window frame between an open position and a closed position by means of the at least one damping device (1).

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