DE202006011846U1 - Device for damping or deceleration of moving furniture parts of furniture - Google Patents

Abstract

contraption (10; 10 ') for damping or Slowing down the movement of relative to a stationary furniture part movable furniture parts at least during a subsection of the total relative movement with one in one casing provided bore (12a), in which a piston (14) longitudinally displaceable is stored, which within the bore (12 a) in dependence from its position of displacement at least one size-variable, with a liquid damping medium filled Working space (20) forms, which over overflow openings (26; 26a, 26b) or channels a strangled passage of the liquid damping medium from one to a second working space (22) allows, on one side the piston (14) led out of the associated end of the housing piston rod (24) is connected via the piston-remote outer end the movement of the to be damped or furniture part to be braked is transmitted to the piston (14), and to compensate for, if necessary, by the volume of Piston rod (14) when retracting changing total volume of workrooms (22; 20) a volume compensating device can be provided, characterized in that in the ...

Description

The The invention relates to a device for damping or deceleration of relatively to an immovable furniture part movable furniture parts at least during a subsection of the total relative movement with a Bore housing, in which a piston is longitudinally displaceable is stored, which within the bore in dependence from its position of displacement at least one size-variable, with a liquid damping medium filled Working space forms, the overflow openings or channels a strangled passage of the liquid Damping medium of one to a second work space allows, being on one side the piston one sealed from the associated end of the cylinder led out Piston rod is connected, over the piston-remote outer end the movement of the to be damped or furniture part to be braked transferred to the piston is, and to compensate for, if necessary, by the volume the piston rod when retracting changing the total volume of workrooms a volume compensating device may be provided.

Such damping or braking devices are used in furniture, for example, to avoid or at least largely reduce the rapid energetic closing of doors or closing drawers of cabinets in the jerky braking of striking the body moving furniture part arising stresses and noise. With viscous liquids, such as. B. silicone oil as a damping medium working damping devices (eg. DE 103 00 732 A1 ) have compared to working with gaseous damping medium devices the advantage that these liquid damping medium are virtually incompressible, so that they have no springback properties, which seek to move the movable furniture part after reaching the closed position again slightly from the actual closed position. In this case, the problem arises that for damping a movable furniture part to be generated damping or braking forces also depend on the mass of the respective furniture part or its closing speed, so that for different damping tasks of the damping characteristic correspondingly adapted different dampers are required. Due to the use of incompressible liquid damping medium, it is therefore necessary to provide a volume compensation device in the piston rod side damping chamber to compensate for the volume of the piston rods during extension or retraction changing total volume of the work spaces, which inevitably the length of the housing of the damping or braking device increased.

Of the Invention is in contrast the task is based, a damping or braking device for furniture parts to create which without remodeling or replacing individual parts different damping or braking forces is adjustable. In particular, the critical length of the housing the damping device in comparison to known from the prior art damping device at least not enlarged, preferably but still be reduced.

outgoing from a device of the type mentioned is this task according to the invention thereby solved, that in the case in addition to the piston longitudinally displaceable receiving piston bore at least one more parallel to the piston bore extending bore is provided, which over at least one with a the size variable formed by the piston in the piston bore Workspaces via an overflow passage connected is. This embodiment allows, for example, a Part of the length of the changing at the stroke of the piston rod workrooms to distribute on two parallel holes, which saves construction length for the housing.

In preferred development of the invention, the embodiment is then so hit that the overflow passage the piston-facing working space of the piston bore with the parallel connects to the piston bore extending bore, in which the second working space is formed.

The overflow passage will be useful in the area the piston rod facing away from the piston bore provided where it is possible is, in the overflow passage a resistance to overflowing damping medium between the two housing bores to provide influencing throttle device.

The Throttle effect of the throttle device is then useful in terms on the parallel to the piston bore holes in the working space the piston bore overflowing working fluid adjustable variable formed, whereby the desired adaptation of the device at required for different masses of furniture components to be damped different damping forces is possible.

In a preferred embodiment of the invention, the throttle device provided in a piston rod away from the working space of the piston bore, resiliently biased in contact with a housing seat throttle plate, wherein a rotatably arranged in the housing adjusting element is provided with an engaging the throttle plate eccentric, which is a continuously variable Ver Changing the size of the throttle gap formed between the throttle plate and the seat and thus allows a change in the damping characteristic.

The Adjustment is then suitably sealed in a housing side open hole stored and on its exterior End provided with means for twisting. These agents can, for example at least one recess or a projection for applying a tool are formed in or at the front end of the adjustment. Thus, then is a change the damping or braking characteristics by means of a screwdriver or a socket wrench without Removal of the device in a simple and fast way possible.

at an alternative embodiment of Invention is the piston bore by two in the direction of the piston stroke spaced spill passages with connected to the bore extending parallel to the piston bore, in which case in the bore extending parallel to the piston bore in the area between the estuaries the overflow passages one Throttle device is provided. The design is suitably made so that one overflow passage the piston rod away from the working space of the piston bore with the bore extending parallel to the piston bore in the area connecting the piston rod facing away from the piston bore, then the second overflow passage in the area of the piston rod-side working space of the piston bore is provided.

Also in this embodiment the throttle device is preferably adjustable in the throttle effect mutable educated.

In Advantageous embodiment, this is achieved in that the Throttle in a longitudinal direction having an adjustable throttle element with an elongate shaft, which tapers slightly conically towards its free end, wherein the conically tapering End longitudinally displaceable in a reduced diameter portion of the piston bore parallel bore is arranged. Due to the possibility of longitudinal displacement of conically rejuvenating End of the throttle shaft is a variation of the annular gap between this end and its diameter reduced section in the second bore and thus a change in the throttle effect possible.

Of the reduced diameter section of the bore is in the range for this purpose provided between the two overflow passages, the rejuvenating End opposite end the throttle shaft with advantage rotatably on one in the associated bore sealed plug inserted, and the plug in threaded engagement with an associated threaded portion in the is parallel to the piston bore bore.

Around also in this embodiment a Adjustment of the throttle effect without removal or modification of the device to enable ends the parallel to the piston bore bore then expedient in their the conically tapered Throttle shaft opposite End open in the housing and in the mouth exposed face the plug means are provided for rotating the throttle element.

These Means can in this embodiment of at least one recess or a projection for attachment a tool, such as a screwdriver, in or be formed at the free end face of the throttle element. Thus, also in this embodiment the damping or braking characteristics by means of a screwdriver or socket wrench without Removal or conversion of the device from the outside easily and quickly possible.

In Inventive training may be in the piston of the device in the piston rod facing away face the piston on the one hand and in the peripheral surface of the piston on the other opening out Passage be provided, in which a the passage of liquid damping medium from the rod away from the working space to the piston rod side Working space when an impermissibly high pressure occurs in the rod away working space contained damping medium enabling overpressure safety valve arranged is. This safety valve is then in the simplest case of one of a biased spring against a valve seat surface in the passage crowded Valve body, z. B. formed in the form of a sphere.

The Invention is in the following description of two embodiments in connection with the drawing explained in more detail and shows or show:

1 u. 2 in each case a central section through the housing of a first embodiment of a damping or braking device according to the invention in a schematic representation in two different functional positions of the throttle device integrated in the housing;

3 an isometric representation of the in the 1 and 2 shown device in an exploded view;

4 one of the 3 corresponding representation in the assembled state;

5 the in 4 within the dash-dot circle portion of the damping device shown on an enlarged scale;

6 a longitudinal center section through the housing of a second embodiment of a damping or braking device according to the invention;

7 u. 8th each Schnittanschitt seen in the direction of arrows 7-7 in 6 wherein different working positions are illustrated the piston in the associated housing bore; and

9 one of the 7 corresponding view on an enlarged scale, in which additionally the piston is cut and can be seen in the piston provided over-pressure safety valve.

That in the 1 to 5 presented, in its entirety with 10 designated embodiment of a damping device according to the invention comprises a housing 12 auf, which - deviating from known damping devices with a hollow cylindrical and therefore usually also referred to as a "cylinder" housing designated damping devices - is shaped so that there is room for two laterally adjacent parallel cylindrical holes 12a and 12b offers. In the in the 1 and 2 hole shown on the left 12a is a piston 14 arranged longitudinally displaceable, which the bore 12a - Depending on the displacement position of the piston 14 - in an upper working space 20 and a lower room 21 divided.

At the bottom of the drawing in the figures of the piston 14 is one the room 21 penetrating piston rod 24 connected by a piston bore 12a on the underside closing front cover 16 passed through. In the upper end area is the piston bore 12a sealed in the embodiment shown by an integral housing, wherein in this end a the working space 20 with the upper end portion of the bore 12b connecting overflow passage 26 to a second working space formed there 22 is provided.

In the at its open underside by another front cover 18 closed hole 12b is longitudinally displaceable a piston 28 arranged, which by one at its lower end side on the one hand and the inside of the end cover 18 supported, under compressive prestressed coil spring 30 is biased in the upward direction. The one by the spring 30 preloaded pistons 28 So tries in the second working space formed above its upper end face 22 located damping medium over the overflow 26 in the workroom 20 to displace, which then inevitably the piston 14 is shifted by the pressure additionally building up there in the damping medium in the downward direction.

The overflow passage 26 which the work space 20 with the workspace 22 connects is with a throttle device 34 provided, which the passage cross section of the overflow 26 adjustable variable forms.

The throttle device 34 has one in the piston bore 12a at the top of the workroom 20 arranged throttle disk 36 on, which by a prestressed coil spring 38 in contact with one in the hole 12a formed (not designated) Sitzflä che is crowded. With complete installation of the throttle disk 34 on the seat is the overflow passage 26 largely closed, so that then when inserting the piston rod 24 into the piston bore 12a established high throttling effect by the strongly throttled passage of damping medium from the working space 20 is generated over a small size remaining between the throttle disk and the overflow passage. In 2 is this functional position of the throttle disk 34 shown.

In 1 In contrast, a positioning of the throttle plate 36 shown in the upper peripheral region of the associated housing seat surface lifted state in which during insertion of the piston rod 24 from the workroom 20 displaced liquid damping medium in addition by the between the bottom of the throttle plate 36 and the housing seat formed gap with enlarged passage cross-section in the working space 22 override and then the one in the hole 12b displaceably arranged piston 28 against the bias of the spring acting on it 30 can move in the downward direction. The feather 30 also serves as a return spring, which the piston 28 pushes back in the upward direction and over it into the work space 20 recirculated damping medium the piston 14 displaced in the downward direction as soon as the force acting on the piston rod in the insertion direction is eliminated.

The through the throttled passage of damping medium from the working space 20 in the other working space 22 certain damping characteristic is thus variable by the throttling effect adjustable throttle device 34 selectable, so that a variable damping effect by corresponding change in the between the throttle plate 36 and the associated housing seat adjustable throttle gap is possible. When overflowing damping medium from the working space 22 in the workroom 20 the damping effect is additionally due to the bias of the spring 38 influenced. Is this bias slightly increased by the overflowing damping medium on the throttle plate 36 force exerted to a greater extent the size of the throttling gap than when using a higher bias spring 38 , Ie. the ratio of the slide at one or in the provision of the piston rod 14 resulting damping forces is due to the choice of the bias of the spring 38 preselected.

Thus, a change in the damping characteristic of the device 10 is possible without installation effort from the outside, is in the upper end face of the housing 12 a in a through bore a rotatably arranged adjusting element 40 used sealed, which at its inner end with a vorreetenden eccentric 42 is provided of reduced diameter. The peripheral surface of this eccentric 42 engages the spring-facing underside of the throttle plate 36 at. By turning the adjusting element 40 changes the engaging on the underside of the throttle disc peripheral surface of the eccentric 42 their position with respect to the axis of rotation of the adjusting element 40 and thus raises the throttle plate 36 in the attack area of the eccentric 40 - Depending on the rotational position of the adjusting element in the housing bore - more or less from the housing seat surface. This rotation of the adjustment can be done in a simple manner by applying a tool, for. B. a screwdriver on a (not shown) Ansetzvertiefung for a turning tool, for. As a screwdriver, in the externally exposed end face of the adjustment 40 respectively.

The throttle disc 36 and the spring 38 are on a short shaft 44 slidably held, which of the inner end face of a closure plug inserted into a through-going housing bore 46 steps forward. The shaft 44 occurs with its free end in the Überströmdruchlass 26 and thus forms an annular throttle gap.

The design and arrangement of the individual components of the device can be in detail the perspective exploded view according to 3 and the associated one 4 and 5 also remove the piston 14 in the hole 12a and the piston 28 in the hole 12b sealing gaskets 14a and 28a as well as the adjusting elements 14 in the associated housing bore sealing gasket 40a is recognizable. It can also be seen that in the end face of the adjusting element 14 a screwdriver slot 41 is formed, in which the cutting edge of a screwdriver is inserted.

In 6 is a second embodiment 10 ' a damping device according to the invention shown, the configuration of which is made with respect to the structure of the damping device so that the functional components of the actual damping device - in accordance with the structure known as piston-cylinder / unit formed damping devices - all in the bore 12a are arranged, while composed of a plurality of longitudinally successive in diameter stepped portions composing parallel bore 12b exclusively for receiving an adjustable throttle device 34 ' is provided, which a stepless adjustment of the throttle effect in the case of a displacement of the piston rod 24 and thus the piston 14 between the two sides of the piston 14 formed workspaces 20 and 22 overflowing damping medium allows.

In the lower, the workroom 22 final area of the piston bore 12a is one of the piston rod 24 slidably interspersed cup seal 50 arranged, which by one as the piston rod 24 inside the case 12 enforced coil spring 52 trained spring is biased in the sense of a shift in the upward direction. The compressive prestress of this coil spring 52 So try the pot seal 50 in the workroom 22 displaced enclosed pressure medium, this being by throttled overflow of the damping medium over the in the second bore 12b provided in the housing throttle device 34 ' is possible. If the pressure in the work area, z. B. by reducing the total volume of the two workrooms 20 . 22 when inserting the piston rod 24 in the workroom 22 rises, the pot seal shifts 50 under compression of the spring 52 , Ie. the cup seal, in cooperation with the helical spring acting upon it, forms the volume compensating device required in this embodiment.

In the area of the lower end of the piston in the lower stroke position with extended piston rod 14 ( 6 and 7 ) connects an overflow passage 26a and in the area of the upper stroke end position ( 8th ) another overflow passage 26b the hole 12a with the stepped in the longitudinal direction in the diameter bore 12b , in which the change to the damping characteristic of the damping device 10 ' provided throttle device 34 ' is arranged. This throttle device 34 ' has one in the lower open mouth of the housing bore 12b usable throttle ment 60 on which one of a threaded portion of the mouth of the hole 12b screw-in plug 62 is formed, from the bore inner end face a shank tapering in its free end region free end region shank 64 steps forward. This conically tapered end portion is by twisting the plug 62 So steplessly in the diameter only slightly larger than the diameter of the shaft sized end portion of the bore 12b screwed in or out.

This is in the transition region to the previous, enlarged diameter section of the bore 12b between the shaft 64 and the step formed between the successive bore sections passage cross-section of the annular throttle gap continuously variable, ie the throttle effect and thus the damping characteristic of the device 10 ' is by twisting the plug 62 by means of a screwdriver slot provided in the outer end face of the plug 41 used screwdriver changeable.

The piston rod 24 is in her out of the hole 12a at the lower end closing end cap 16 led out area of one on the outside of the front cover 16 on the one hand and provided on the free end of the piston rod head 56 enlarged diameter supported compression spring 58 in the in the 7 and 9 illustrated initial positions, at which the piston 14 in his lower stroke end position and the work space 22 is reduced from its minimum volume.

If in the in the starting position according to 7 standing head 56 at the outer free end of the Kolbestange 24 an unexpectedly high, possibly even burst-like stress is initiated, it can lead to an impermissible pressure increase in the working space 20 located damping medium come, as a result of the throttle effect of the throttle device 34 can not be dismantled immediately. In this case, damage or destruction of the damping device 10 ' to avoid is in the piston 14 when an inadmissibly high pressure occurs in the working space 20 contained damping medium appealing overpressure safety valve 66 provided, which in 9 in the interior of the opposite 7 additionally shown cut piston 14 is illustrated schematically.

This safety valve 66 has one in the workroom 20 facing end face of the piston 14 on the one hand and in the peripheral surface of the piston below the piston seal 14a on the other hand, opening passage 68 in which that the passage of liquid damping medium from the working space 20 to the piston rod side working space 22 Overpressure safety valve enabling excessive pressure 66 is provided. This safety valve 66 is in the case illustrated by one of a biased spring 70 against a valve seat surface in the passage 66 crowded valve body in the form of a valve ball 72 educated.

Claims (19)

Contraption ( 10 ; 10 ' ) for damping or slowing down the movement of furniture parts which can be moved relative to a stationary furniture part, at least during a partial section of the total relative movement with a bore provided in a housing ( 12a ), in which a piston ( 14 ) is longitudinally displaceable, which within the bore ( 12a ) depending on its displacement position at least one variable-size, filled with a liquid damping medium working space ( 20 ), which via overflow openings ( 26 ; 26a . 26b ) or channels a throttled passage of the liquid damping medium from one to a second working space ( 22 ), wherein on one side of the piston ( 14 ) a guided out of the associated end of the housing piston rod ( 24 ) is connected, via the piston-remote outer end of the movement of the furniture part to be damped or braked on the piston ( 14 ) and, if necessary, by the volume of the piston rod ( 14 ) when changing the overall volume of the work spaces ( 22 ; 20 ) a volume compensating device can be provided, characterized in that in the housing ( 12 ) in addition to the piston ( 14 ) longitudinally displaceable receiving piston bore ( 12a ) at least one further parallel to the piston bore ( 12a ) running bore ( 12b ) is provided, which via at least one with one of the piston formed in the piston bore variable-size working space ( 20 ) via an overflow passage ( 26 ; 26a . 26b ) connected is. Apparatus according to claim 1, characterized in that the overflow passage ( 26 ) the rod away from the working space ( 20 ) of the piston bore ( 12a ) with the bore extending parallel to the piston bore ( 12b ), in which the second working space ( 22 ) is provided. Apparatus according to claim 1 or 2, characterized in that the overflow passage ( 26 ) in the region of the rod end facing away from the piston bore ( 12a ) is provided. Apparatus according to claim 3, characterized by gekenn records that in the overflow passage ( 26 ) a resistance to overflowing damping medium between the two housing bores ( 12a ; 12b ) influencing throttle device ( 34 ) is provided. Apparatus according to claim 4, characterized in that the throttling effect of the throttle device ( 34 ) with respect to that of the piston bore ( 12a ) parallel bore ( 12b ) in the working space ( 22 ) of the piston bore overflowing working fluid is adjustable adjustable formed. Apparatus according to claim 4 or 5, characterized in that the throttle device ( 34 ) in the piston rod away from the working space of the piston bore ( 20 ) provided, resiliently biased in contact with a housing seat throttle plate ( 36 ), and in that a rotatable in the housing ( 12 ) arranged adjusting element ( 40 ) with a at the throttle plate ( 36 ) engaging eccentric ( 42 ) is provided. Apparatus according to claim 6, characterized in that the adjusting element ( 40 ) mounted sealed in a housing outside open bore opening and at its housing outside end with means ( 41 ) is provided for rotation. Device according to claim 7, characterized in that the means ( 41 ) for rotating the adjusting element ( 40 ) of at least one recess or a projection for applying a tool in or at the free end face of the adjusting element ( 40 ) are formed. Apparatus according to claim 1, characterized in that the piston bore ( 12a ) by two in the direction of the piston stroke spaced spill passages ( 26a ; 26b ) with the bore extending parallel to the piston bore ( 12b ) and that in the bore extending parallel to piston bore ( 12b ) in the region between the mouths of the overflow passages ( 26a ; 26b ) a throttle device ( 34 ' ) is provided. Apparatus according to claim 9, characterized in that the one overflow ( 26b ) the rod away from the working space ( 20 ) of the piston bore ( 12a ) with the parallel to the piston bore ( 12a ) run the bore ( 12b ) in the region of the rod end facing away from the piston bore, and that the second overflow passage ( 26a ) in the area of the piston rod side working space ( 22 ) of the piston bore ( 12a ) is provided. Apparatus according to claim 9 or 10, characterized in that the throttle device ( 34 ' ) is adjustable adjustable in the throttle effect. Apparatus according to claim 11, characterized in that the throttle device ( 34 ' ) a longitudinally adjustable throttle element ( 60 ) with an elongated shaft ( 64 ), which tapers slightly conically towards its free end, and in that the conically tapering end is longitudinally displaceable in a reduced diameter portion of the piston bore (10). 12a ) parallel bore ( 12b ) is arranged. Apparatus according to claim 12, characterized in that the reduced diameter portion of the bore ( 12b ) in the area between the two overflow passages ( 26a ; 26b ) is provided. Device according to Claim 13, characterized in that the end of the throttle shaft opposite the tapering end ( 64 ) rotatably on one in the associated bore ( 12b ) sealed plug ( 62 ) and that the stopper ( 62 ) in threaded engagement with an associated threaded portion in the parallel to the piston bore ( 12a ) extending bore is. Apparatus according to claim 14, characterized in that the parallel to the piston bore ( 12a ) running bore ( 12b ) in its opposite the conically tapered throttle shaft end open in the housing ( 12 ), and that in the end face of the plug exposed in the mouth ( 62 ) Means for rotating the throttle element ( 60 ) are provided. Device according to claim 15, characterized in that the means ( 41 ) for rotating the throttle element ( 60 ) of at least one recess or a projection for applying a tool in or at the free end face of the throttle element ( 60 ) are formed. Device according to one of claims 9 to 16, characterized in that in the piston ( 14 ) in the piston rod facing away from the end face of the piston ( 14 On the one hand and in the peripheral surface of the piston on the other hand opening passage ( 68 ) is provided, in which a the passage of liquid damping medium from the piston rod away from working space ( 20 ) to the piston rod side working space ( 22 ) upon occurrence of an impermissibly high pressure in the damping medium contained in the piston rod away from the working chamber enabling overpressure safety valve ( 66 ) is arranged. Device according to claim 17, characterized in that the safety valve comprises a spring (a) under prestressing 70 ) against a valve seat surface in the passage ( 68 ) crowded valve body ( 72 ) having. Device according to claim 18, characterized in that the valve body ( 72 ) is spherical.