AT504054B1 - DEVICE FOR CUSHIONING OR BZW. BREAKDOWN OF MOVABLE FURNITURE PARTS OF FURNITURE PIECES - Google Patents

Abstract

A device (10) is proposed for damping or slowing down the movement of furniture parts movable relative to a stationary furniture part. According to the invention, a throttling device (34) influencing the resistance to overflowing damping medium between housing bores (12a, 12b) is provided in an overflow passage (26), wherein the throttle device (34) has a working chamber (20) of a piston bore (12a) facing away from the piston rod ), resiliently biased into abutment with a housing seat surface throttle plate (36), and in that a rotatably in the housing (12) arranged adjusting element (40) with an on the throttle plate (36) engaging eccentric (42) is provided.

Description

Austrian Patent Office AT 504 054 B1 2014-02-15

Description: The invention relates to a device for damping or braking furniture parts that are movable relative to an immovable furniture part, at least during a partial section of the total relative movement with a housing having a bore, in which a piston is mounted so as to be longitudinally displaceable within the bore from its displacement position forms at least one large variable, filled with a liquid damping medium first working space, which allows a throttled passage of the liquid damping medium from the first to a second variable-sized working space via an overflow passage or channel, wherein on one side of the piston a sealed from the associated End of the cylinder led out piston rod is connected, on the piston-remote outer end, the movement of the furniture part to be damped or braked is transmitted to the piston, wob ei the second working space is formed by a further in the housing in addition to the piston longitudinally displaceable piston bore provided further, parallel to the piston bore hole formed, which is connected via the overflow with the first variable-size working space formed by the piston in the piston bore wherein the overflow passage connects the first working chamber of the piston bore in the region of the piston rod end facing away from the second working space formed by the bore extending parallel to the piston bore.

Such damping or braking devices are used in furniture, for example, to avoid the rapid and energetic closing of doors or closing of drawers of cabinets in the jerky braking of the carcase moving furniture part resulting stresses and noise or largely reduce , With viscous liquids, such as. As silicone oil working as a damping medium 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 the movable furniture part after reaching the Close position again to move back 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 changed total volume of the work spaces, which the length of the housing of the damping or Braking device inevitably increased.

Such damping or braking devices are known from DE 528 780 C1 and US 3,358,318 A, in which case a device for damping the closing movement of a door with a provided in a housing bore, in which a piston is mounted longitudinally displaceable wherein the piston divides the bore into two working spaces. The piston also has a guided out of the housing piston rod, which transmits the movement of the braked door on the piston. In the housing also a bore parallel to the piston bore is provided, which is connected via overflow openings with the piston bore and the work spaces.

Furthermore, DE 28 35 825 A1 discloses a damping device for damping relatively movable parts wherein the device has a housing with two holes arranged parallel to each other. In a bore, a piston is mounted longitudinally displaceable, which divides the bore into two working spaces, wherein the working spaces are connected by overflow openings and the further working space forming bore. The piston further comprises a led out of the housing piston rod 1/7 Austrian Patent Office AT504 054B1 2014-02-15 on the piston-remote end, the movement of the braked part is transmitted to the piston.

Furthermore, from JP 59 021 382 U a damping device for damping movements of sliding doors is known, wherein the device has a housing with a bore. In the housing, a piston is mounted longitudinally displaceable, which forms a variable-size working space within the bore, which allows overflow passage a passage of a damping medium from the first to a second variable-size working space. The second working space is formed by a further bore provided in the housing in addition to the piston bore receiving the piston in a longitudinally displaceable manner, which bore is connected to the first working space via the overflow passage.

A disadvantage of the known damping and braking devices, however, is that no throttle device is provided with a throttle disk, which regulates the resistance to overflowing damping medium between the two holes in the overflow. As a result, the known damping and braking devices also have no rotatably arranged in the housing adjustment with an attacking on the throttle disc eccentric.

The invention is based on the object to provide a damping or braking device for furniture parts, which is adjustable without conversion or replacement of individual parts to different damping or braking forces. In particular, the critical length of the housing of the damping device should not be increased in comparison to known from the prior art damping device, but preferably still be reduced.

Starting from a device of the type mentioned above, this object is achieved in that in the overflow passage a resistance to the overflowing damping medium between the two housing bores influencing throttle device is provided, wherein the throttle device in a kolbenstangenabge-facing working space of the piston Bore provided, resiliently biased in abutment with a housing seat surface throttle plate, and that a rotatably arranged in the housing adjusting element is provided with an engaging on the throttle disc eccentric.

The throttle device has adjusting means for changing the throttle effect in the bore parallel to the bore of the piston in the working space of the piston bore working fluid, thereby allowing an adaptation of the device to the required at different masses of the damped furniture components different damping forces becomes.

The eccentric allows a stepless change in the size of the throttle gap formed between the throttle plate and seat and thus a change in the damping characteristic.

The adjustment is then suitably sealed stored in a housing side open opening bore and provided at its outer end of the housing with means for rotation. These means can be formed for example by at least one recess or a projection for applying a tool in or at the front end of the adjusting element. Thus, then a change in the damping or braking characteristics by means of a screwdriver or a socket wrench without removing the device in a simple and fast way possible.

The invention is explained in more detail in the following description of an embodiment in conjunction with the drawing, in which: Fig. 1 u. 2 each show a central section through the housing of an exemplary embodiment of a damping or braking device according to the invention in a schematic illustration in two different functional positions of the throttle device integrated in the housing; 2.7

Austrian Patent Office AT504 054B1 2014-02-15 [0014] FIG. 3 shows an isometric view of the device shown in FIGS. 1 and 2 in an exploded view; FIG. 4 shows a representation corresponding to FIG. 3 in the assembled state; FIG. and [0016] FIG. 5 shows, on an enlarged scale, the part area of the damping device illustrated in FIG. 4 within the dot-dashed circle; The illustrated in Figures 1 to 5, denoted in its entirety by 10 embodiment of a damping device according to the invention comprises a housing 12, which - deviating from known, with a hollow cylindrical and therefore usually also short as "cylinder". designated housing provided damping devices - is shaped so that there is room for two laterally adjacent parallel cylindrical bores 12a and 12b. In the hole 12a shown on the left in Figures 1 and 2, a piston 14 is arranged longitudinally displaceable, which divides the bore 12a-depending on the displacement position of the piston 14 - in an upper working space 20 and a lower space 21.

At the bottom in the drawing figures end face of the piston 14, a space 21 passes through the piston rod 24 is connected, which is passed through a the piston bore 12a on the underside closing end cap 16. In the upper end region, the piston bore 12a is closed by an integral housing wall in the specifically illustrated embodiment, wherein in this end region a overflow passage 26 connecting the working space 20 to the upper end region of the bore 12b is provided to a second working space 22 formed there.

In the closed at its open bottom by a further end cap 18 bore 12b, a piston 28 is longitudinally displaceable, which is biased by a supported on its lower end side on the one hand and the inside of the end cover 18, under compression bias coil spring 30 in the upward direction. The biased by the spring 30 piston 28 thus tries to displace in the above its upper end surface formed second working space 22 befindliches damping medium via the overflow 26 into the working space 20, whereby then inevitably the piston 14 by the there additionally building pressure in the damping medium in the downward direction is moved.

The overflow passage 26, which connects the working chamber 20 with the working chamber 22, is provided with a throttle device 34, which forms the passage cross section of the overflow passage 26 adjustable changeable.

The throttle device 34 has a valve disposed in the piston bore 12a at the upper end of the working chamber 20 throttle disk 36 which is urged by a standing under pressure bias coil spring 38 in abutment with a formed in the bore 12a (not designated) seating surface. Upon complete contact of the throttle disk 36 on the seat of the overflow 26 is largely closed, so that then built when inserting the piston rod 24 in the piston bore 12a high throttling effect by the heavily throttled passage of damping medium from the working chamber 20 via a between the throttle plate and the overflow passage remaining small size cleavers is generated. FIG. 2 shows this functional position of the throttle disk 36.

In Figure 1, by contrast, a positioning of the throttle disc 36 is shown in the upper peripheral region of the associated housing seat lifted state in which when inserting the piston rod 24 from the working space 20 displaced liquid damping medium additionally by the between the bottom of the throttle disc 36th and the housing seat surface formed gap with enlarged passage cross section into the working space 22 and then pass the displaceably arranged in the bore 12b piston 28 against the bias of the spring 30 acting on it can move in the downward direction. The spring 30 also serves as a return spring, which pushes back the piston 28 in the upward direction and displaces the piston 14 in the downward direction via the damping medium recirculated into the working space 20, as soon as the In the insertion direction acting on the piston rod force is eliminated.

The particular by the throttled transfer of damping medium from the working chamber 20 into the other working space 22 specific damping characteristic is thus selectable by the throttle effect changeable adjustable throttle device 34, so that a variable damping effect by appropriate variation of the between the throttle disc 36 and the associated housing seat adjustable throttle gap is possible. When overflow of damping medium from the working chamber 22 into the working space 20, the damping effect is additionally influenced by the bias of the spring 38. If this bias is small, the force applied to the orifice plate 36 by the overflowing damping medium increases the size of the throttling gap to a greater extent than when using a higher tension spring 38. the ratio of the resulting upon insertion or in the provision of the piston rod 14 damping forces can be preselected by the choice of the bias of the spring 38.

Thus, a change in the damping characteristic of the device 10 without installation effort from the outside is possible in the upper end face of the housing 12 is rotatably inserted in a through bore rotatably arranged adjustment 40, which at its inner end with a vorrezenden eccentric 42 of reduced diameter is provided. The peripheral surface of this eccentric 42 engages the spring-facing underside of the throttle disk 36. By rotating the adjusting element 40, the peripheral surface of the eccentric 42 acting on the underside of the throttle plate changes its position with respect to the axis of rotation of the adjusting element 40 and thus raises the throttle disk 36 in the engagement region of the eccentric 42, depending on the rotational position of the adjusting element in the housing bore - more or less from the housing seat. 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. B. a screwdriver, carried out in the externally exposed end face of the adjusting element 40.

The throttle disc 36 and the spring 38 are held displaceably on a short shaft 44, which protrudes from the inner end face of a closure plug 46 inserted into a continuous housing bore. The shaft 44 enters with its free end into the overflow passage 26 and thus forms an annular throttle gap.

The design and arrangement of the individual components of the device can be seen in detail in the perspective exploded view of Figure 3 and the associated Figures 4 and 5, wherein the piston 14 in the bore 12a and the piston 28 in the bore 12b sealing Sealing rings 14a and 28a and the adjusting element 40 in the associated housing bore sealing sealing ring 40a can be seen. In addition, it can be seen that in the end face of the adjusting element 40, a screwdriver slot 41 is formed, in which the cutting edge of a screwdriver is inserted. 4.7

Claims (3)

Austrian Patent Office AT504 054B1 2014-02-15 Claims 1. A device (10) for damping or slowing down the movement of furniture parts movable relative to an immovable furniture part at least during a partial section of the total relative movement with a bore (12a) provided in a housing (12) ), in which a piston (14) is mounted longitudinally displaceable, which forms within the bore (12 a) depending on its displacement position a variable size, filled with a liquid damping medium first working space (20) via an overflow passage (26) or channel throttled passage of the liquid damping medium from the first into a second variable-size working space (22), wherein on one side of the piston (14) led out of the associated end of the housing piston rod (24) is connected, via the piston remote outer end of the movement to steam The second working chamber (22) is supported by a further, in the housing (12) in addition to the piston (14) longitudinally displaceable receiving piston bore (12a), parallel to the piston Bore (12 a) extending bore (12 b) and a longitudinally displaceable piston (28) and a spring (30) is formed, and wherein the bore (12 b) via the overflow passage (26) with the piston (14) in the piston bore (12a) formed first variable-sized working space (20) is connected, and wherein the overflow passage (26) the first working space (20) of the piston bore in the region of the rod end remote from the parallel to the piston bore bore (12b) formed second working space (22), characterized in that in the overflow passage (26) has a resistance to the overflowing damping medium between the two housing bores (12a, 12 b) influencing throttle device (34) is provided, wherein the throttle device (34) has a piston rod in the remote working space (20) of the piston bore (12 a) provided resiliently biased in contact with a housing seat throttle plate (36), and that a rotatably arranged in the housing (12) adjusting element (40) with an on the throttle disc (36) engaging eccentric (42) is provided. 2. Apparatus according to claim 1, characterized in that the adjusting element (40) mounted sealed in a housing outside open bore opening and provided at its housing outer side end with means (41) for rotation. 3. Apparatus according to claim 2, 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. For this 2 sheets drawings 5/7