CN101248244B - Damping element - Google Patents

Abstract

A damping element (1), in particular for movable furniture parts, comprising a linear damper having a cylinder (12) and a piston movable in the cylinder (12), the piston comprising a A piston rod (15) is connected thereto, wherein the piston rod (15) is biased into a position protruding from the cylinder (12). At the same time the stroke length of the piston rod (15) relative to the cylinder (12) is adjustable, so that the damping displacement can be adapted to the corresponding furniture part.

Description

cushioning element

technical field

The invention relates to a damping element, in particular for movable furniture parts, comprising a linear damper having a cylinder and a piston movable in the cylinder, the piston comprising a An attached piston rod, wherein the piston rod is biased to a position protruding from the cylinder.

Background technique

Known from DE 202 05 076 is a linear damper for movable furniture parts, wherein a cylinder and a piston rod located in the cylinder are provided. For a damping process, the cylinder forms a push rod into which the piston rod can be pressed against a spring force. Although such a linear damper damps the closing movement of movable furniture parts such as cabinet doors or drawers, it is designed especially for a certain type of furniture in which a suitably configured push rod and cylinder form a unit.

DE 202 00 798 discloses a damping device for movable furniture parts, wherein a linear damper is provided, which has a cylinder and a piston preloaded by a spring. The linear damper can be pushed into a housing via screws to adjust the contact point for damping of a furniture part. The maximum travel of the linear buffer remains constant, and only the other adjustment range of the travel is used for damping in the event of a displacement of the linear buffer. If one adjusts the mounting position of the linear damper, although a small adjustment path can be exploited, for example, at the same time there is the problem that in the initial range of the damping movement there is less force via the spring and the damper and it is not possible to Utilizes the high force generated by the spring of the linear buffer at the end of the maximum travel. In this adjustment mode, the damping element is always used from a fully extended position to a partially extended position. The end position of the damper is only reached at the maximum adjusted adjustment displacement. Furthermore, there is the disadvantage that the forces generated, in particular also due to dynamic damping, act directly on the adjusting device, which can lead to premature wear over prolonged use. Furthermore, since the adjusting device has a large overall length, it is arranged in the direction of movement of the damper.

Contents of the invention

It is therefore an object of the present invention to provide a damping element which, with respect to the damping force, can be adapted to different application purposes and thus can be used for different furniture pieces. For this purpose, a defined end position of the linear buffer should always be reached. Furthermore, it should be possible to decouple the resulting damping force from an adjusting device.

This object is achieved with a damping element having the features of claim 1 .

According to the invention, the length of the stroke of the piston rod relative to the cylinder is adjustable. The damping element can thus be used universally for different movable furniture parts, wherein the damping displacement can be adapted to the corresponding furniture part, in which case the linear damper is not adjusted, but the displacement displacement of the piston rod is changed, because light furniture parts are in contrast to heavier ones. Generally only a lower damping force is required compared to other furniture parts and the type of furniture part can also be important for the required damping displacement. As far as this is concerned, the same cushioning element can be adapted for different purposes. At the same time, the same force of the pretension spring always acts at the end of the damping displacement, regardless of how far the stroke displacement of the piston rod relative to the cylinder is set. Naturally, it is also possible to adjust the tensioning force of the spring in addition, so that further adjustments can be made.

According to a preferred embodiment of the invention, an adjustment device is provided in order to push the piston rod into the cylinder against the force of a spring. The adjusting device can here form a stop in order to limit the movement of the piston rod out of the cylinder. As a result, the stroke of the piston rod relative to the cylinder can be limited and the damping displacement can be varied accordingly. Regardless of the length of the damping displacement, in addition to the dynamic damping force, the pretensioning of the spring is also used to prevent slamming of moving furniture parts, such as doors. In addition, the adjusting device can be disengaged from the forces generated by the dynamic damper.

The cushioning element preferably has a housing that can be attached to a furniture part, from which a push rod protrudes, which is connected to the piston rod or the cylinder. The cylinder and the piston rod are then housed in the housing in a protected manner and only the push rod protrudes from the housing, so that a movable component, such as a hinge or a movable furniture part, can rest on the push rod in order to move the The push rod is pushed into the housing. Naturally, it is also possible for a movable component to act directly on the cylinder or the piston rod of the linear damper.

The adjusting device can comprise a curved guide, whereby the curved guide can adjust a limiting element for the travel relative to the housing. Via the adjusting device, an adjusting element can then continuously adjust the length of the stroke according to the desired length of damping displacement. For this purpose, the adjusting device can be designed as an adjusting disk, on which a helical curve guide is formed, into which the pin of a limiting element engages.

For a compact construction, the limiting element can have a web which engages through an opening in the housing into a receptacle on the plunger. A damping element can then be formed with only a small number of components. The push rod can cooperate with a hinge element on which a pivotable furniture door is fastened. Furthermore, it is possible to use the damping element in drawers or other movable furniture parts.

The adjustment device can also be formed by a lockable slide or a lockable lever, whereby the damping displacement can be adjusted. In addition, a stop which can be fixed in different positions can also be provided.

Description of drawings

The invention is explained in more detail below with the aid of a number of exemplary embodiments with reference to the drawings. in:

Fig. 1 is the perspective view of the cushioning element of the present invention in the installed state;

Figures 2 and 3 are two views of the cushioning element of Figure 1 in different positions;

Figures 4, 5, 6 and 7 are different views of the cushioning element of Figure 1 in different positions;

Fig. 8 is an exploded view of the cushioning element of Fig. 1;

Figure 9 is an exploded view of another embodiment of a cushioning element;

Figure 10 is a perspective cutaway view of a cushioning element according to another embodiment;

Figure 11 is a perspective view of another embodiment of a cushioning element; and

Figure 12 is a force-displacement diagram of the cushioning element of the present invention.

Detailed ways

A damping element 1 serves to damp the movement of the movable furniture part and comprises a plate 2 which can be fastened via screws to a deflectable door 3 . Mounted on the plate 2 is a housing 4 in which the other components of the damping element 1 are arranged in a protected manner. The door 3 is fastened to a fixed furniture body 5 , on which is mounted a hinge 6 , on which the panel 2 is pivotably fixed via a hinge mechanism 7 . Attached to the furniture body 5 is a further plate 8 , on which the hinge 6 is fastened, whereby the position of the door 3 relative to the furniture body 5 can be adjusted via screws 9 .

At the end of the closing movement, the movement of the door 3 relative to the furniture body 5 should be suppressed in order to prevent the door 3 from slamming shut. For this purpose, a damping element 1 is provided which comprises a push rod 10 which acts on the hinge part 6, wherein the push rod 10 can consist of a plastic material, metal or another material.

As shown in FIG. 2 , the push rod 10 protrudes from the housing 4 and no longer bears against the hinge 6 when the door 3 is opened. The push rod 10 is connected, for example by a clamp connection or elastic snap connection, to a cylinder 12 which is an element of a linear damper. Furthermore, an adjusting disc 11 is provided in order to be able to adjust the damping displacement.

FIG. 3 shows the position of the door 3 in which the hinge part 6 bears against the push rod 10 . In this position, the joint element 6 presses against the push rod 10 and moves it into the housing 4 , while the push rod 10 acts on the cylinder 12 of the linear damper, which generates dynamic and static damping forces.

FIG. 4 shows a detail of the damping element 1 , which, in addition to the cylinder, is provided in the housing 4 with a piston rod 15 which can be moved into the cylinder 12 . The cylinder body 12 and the piston rod 15 can be constructed as described in DE 202 05 076. Other forms of linear dampers are also possible in which the piston rod 15 is pressed out of the cylinder 12 via a spring. Hydraulic or pneumatic damping elements can be used for damping the dynamic movement. Unlike the prior art, the resulting damping force does not act on an adjusting device, but is transmitted directly into the housing 4, which can be mounted correspondingly securely.

The cylinder 12 and the piston rod 15 are arranged in an inner space 16 of the housing 4 , wherein the distance from the cylinder 12 to the end wall of the housing 4 is a predetermined length l, and the cylinder 12 is displaceable up to this length l. It is also possible to press the plunger 10 into the housing 4 up to this length.

Furthermore, the length l is predetermined by means of an adjusting device, which comprises a limiting element 13 which engages in a receptacle 14 on the plunger 10 . Due to the spring in the cylinder 12 , the push rod 10 together with the cylinder 12 can no longer be removed from the housing 4 . The limiting element 13 is connected to the adjusting disc 11 , and at this time, the maximum buffering displacement can be limited by the rotation of the adjusting disc 11 .

FIG. 5 shows a position in which the piston rod 15 projects farther out of the cylinder 12 than in FIG. 4 . This results in a longer damping path L, for which purpose the limiting element 13 is correspondingly moved to the right in order to lengthen the damping path.

FIG. 6 shows a position in which the furniture door 3 is closed and the hinge part 6 is pressed against the push rod 10 . The cylinder body 12 is now in close contact with the housing 4 and the piston rod 15 is in the cylinder body. Between the limiting element 13 and a wall of the push rod 10 there is thus seen a maximum length H of the stroke which the cylinder 12 and the push rod 10 can carry out. If the limiting element 13 is moved slightly further to the right, the stroke is correspondingly increased.

FIG. 7 shows the installed state of the damping element 1 , in which the furniture door is likewise in the closed position and the hinge part 6 rests against the push rod 10 . In this case, however, the cylinder 12 is not arranged directly next to the housing 4 and is arranged at a distance b from the housing 4 . The maximum stroke length of the damping element is therefore not fully utilized, and in particular the last part of the damping displacement, in which the spring exerts its greatest force in the cylinder, is not utilized. Such an installation situation can be used in particular for lighter furniture parts, in which a maximum spring force for the movement braking is not absolutely necessary. In this installation situation, too, a maximum travel H occurs between the limiting element 13 and a wall of the push rod 10 .

The cushioning element of the present invention is shown in detail in the exploded view of FIG. 8 . The housing 4 includes a cylindrical receiving space for the cylinder 12 and the protruding piston rod 15 . An adjustment disc 11 is arranged below the housing 4, in which a helical curved guide 17 is opened. The adjusting disc is rotatable around an axis which is embedded in a hole 18 on the adjusting disc 11 .

The limiting element 13 is formed by a U-shaped bracket 20 , on its sides and at the end faces upwardly protruding webs 21 are formed. These two webs pass through slots 22 in the housing 4 and are then guided in receptacles 14 on the plunger 10 . Also formed on the U-shaped bracket 20 on the side facing the adjusting disk 11 is a pin 19 which engages in the helical curve guide 17 . Thereby, the position of the moving element 13 can be adjusted along the stroke displacement direction of the cylinder 12 by adjusting the rotation of the disc 11 . In this way it is possible to reduce the displacement of the piston rod 15 , while the position of maximum displacement is determined by the contact of the cylinder 12 on the housing 4 .

9 to 11 show a modified embodiment of a damping element. In this case, identical components are provided with the same reference numerals.

In the exemplary embodiment shown in FIG. 9 , a lever 13 ′ is provided as limiting element, which lever is pivotably mounted on the housing, the lever 13 ′ being arranged rotatably about a pin 30 . The lever 13' comprises an operating part 33 which protrudes from the housing and is pivotable. Furthermore, a cam-shaped opening 31 is formed in the housing, into which a pin of the lever 13 ′ engages, while this pin additionally engages in a recess 14 ′ on the plunger 10 . The pin thus forms a stop in the form of a stop in order to be able to adjust the maximum extension movement of the damping element. In addition, a plurality of positioning elements are provided on the lever 13', which cooperate with corresponding receiving portions 34 on the housing, so that the lever 13' can be locked in different positions.

In the embodiment of a buffer element shown in FIG. 10, a limiting element 13 "is provided, which constitutes a movable slide. The slide can move in a recess 14" of a push rod 10, while the slide 13" is moved via a spring is preloaded outwards. This presses a rib-shaped projection 40 into each positioning tooth 41, so that the slide 13" can be pressed downwards and then moved into the desired position. The sliding plate then engages and can then define the maximum stroke of a cylinder 12 of a linear damper.

Another embodiment of a cushioning element is shown in FIG. 11, wherein the travel displacement is limited via a stop 13"' on which a pin 52 is arranged, which can be inserted into each adjacent hole 50, 51 and It then remains fixed there. The pin 52 also engages in a recess 14 ″' on the push rod 10 , so that a maximum stroke movement of the cylinder 12 and the push rod 10 is limited by the stop 13 ″.

In FIG. 12 a force-displacement diagram of a cushioning element according to the invention is shown. With increasing displacement, the force effected by the spring in the linear damper increases, so that there is a greater force at the end of the damping movement than at the beginning. At the same time, the maximum stroke H of the push rod 10 and the cylinder body 12, that is, the distance between the points X2 and X3 can be adjusted through the limiting devices 13, 13', 13", 13"'. Another possible travel displacement V between the points X1 and X2 is not used in the damping element 1 . In the closed position of the door, however, the spring force has a maximum value at position X3, which is independent of the length of the stroke displacement.

If desired, it is naturally also possible to deflect the damping element in such a way that only the part with the lower spring force for the damping element is utilized, as shown in FIG. 7 . Both the spring force and the damping displacement can be optimally adjusted to the corresponding furniture part with the damping element according to the invention. Furthermore, the push rod 10 can be exchanged and longer and shorter push rods can be used in order to adapt to a changed installation situation.

In the exemplary embodiments shown, the piston rod 15 always bears against the housing 4 . It is naturally also possible to arrange the cylinder 12 on the housing and to connect the piston rod to the push rod 10 . Furthermore, in a corresponding embodiment the push rod 10 can be formed directly by the cylinder 12 or the piston rod 15 in order to require as few components as possible for the damping element.

In the exemplary embodiment shown, the damping element is attached to a hinge element, while the damping element is attached to the door. It is naturally possible to mount the cushioning element on the furniture body. The cushioning element can also be used in other furniture, for example in drawer guides and other furniture accessories.

Furthermore, different mechanisms are shown for adjusting the maximum stroke. It is also possible here to use other mechanical arrangements in order to limit the maximum stroke displacement without departing from the basic idea of the invention. At the same time, it is also possible to bring the cylinder 12 into direct contact with movable furniture parts, for example if the push rod 10 is to be dispensed with.

In the exemplary embodiments shown, the damping element is integrated into the furniture fitting and is therefore mounted on the furniture together with the furniture fitting. Naturally, it is also possible to install the damping element separately from the furniture fitting and thus retrofit existing furniture. In addition, the damping element can be detachably connected to a furniture fitting in order to be installed when required, while screw connections or other mechanical means can be used for the connection of known positioning elements or clamping elements.

Claims (11)

1. A cushioning element (1) comprising a housing (4) mountable on a furniture part; a linear damper having a cylinder (12) and a cylinder (12) a movable piston comprising a piston rod (15) connected to the piston; and a push rod (10) protruding from the housing (4) and connected to the piston rod (15) or the cylinder Body (12) connection, wherein the piston rod (15) of the linear buffer is biased to a position protruding from the cylinder (12); characterized in that the adjustment device (11, 13, 14; 13' ; 13 ", 13 "'), the adjustment device constitutes a stopper to limit the movement of the push rod (10) and therefore the piston rod (15) from the cylinder (12), wherein the piston rod (15) is relatively The length of the stroke of the cylinder (12) can be adjusted. 2. The cushioning element according to claim 1, characterized in that the piston rod (15) can push the cylinder against the force of a spring via the adjustment device (11, 13, 14; 13', 13", 13"') (12). 3. The damping element according to claim 1 or 2, characterized in that the adjusting device comprises a curved guide (17), whereby the curved guide can adjust a limit for the stroke relative to the housing (4) element (13). 4. Damping element according to claim 1 or 2, characterized in that the adjusting device has an adjusting element (11) for continuously adjusting the length of the stroke. 5. The damping element according to claim 1 or 2, characterized in that the adjusting device comprises an adjusting disc (11), in which a helical curved guide (17) is formed, a limiting element The pin (19) of (13) fits into said curved guide. 6. The cushioning element according to claim 3, characterized in that the limiting element (13) has a strip (21), which is inserted through a slot (22) of the housing (4) into the push rod ( 10) in a housing (14). 7. Damping element according to claim 1 or 2, characterized in that the push rod (10) cooperates with a hinge element on which a deflectable furniture door (3) is fastened. 8. Damping element according to claim 1 or 2, characterized in that the adjusting device is formed by a lockable slide (13") or a lockable lever (13'). 9. Damping element according to claim 1 or 2, characterized in that the adjustment device is formed by a stop (13"') which can be fixed in different positions. 10. The damping element as claimed in claim 1 or 2, characterized in that it is used for movable furniture parts. 11. The cushioning element according to claim 5, characterized in that the limiting element (13) has a strip (21) which engages the push rod ( 10) in a housing (14).

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