KR101777495B1

KR101777495B1 - Damping device for moveable furniture parts and method for the production thereof

Info

Publication number: KR101777495B1
Application number: KR1020157037166A
Authority: KR
Inventors: 클라우스 뵘; 도미니크 학슈필
Original assignee: 줄리우스 블룸 게엠베하
Priority date: 2013-07-01
Filing date: 2014-05-09
Publication date: 2017-09-11
Also published as: CN105358784B; SI3017132T1; CN105358784A; JP2016526624A; EP3017132A1; AT514519B1; WO2015000001A1; KR20160016954A; AT514519A1; JP6165976B2; EP3017132B1

Abstract

The invention relates to a damping device (1) for a movable furniture part (2), said damping device comprising at least two housing parts (3, 4) in which at least one sealing ring (5) Wherein one of the two housing parts (3) has a mating shape (6) for holding the seal ring (5), and the cross section of the mating ring (6) has a circular shape And has an exclusive positive curvature contour.

Description

[0001] DAMPING DEVICE FOR MOVABLE FURNITURE PARTS AND METHOD FOR MANUFACTURING THE SAME [0002]

The present invention relates to a damping device for a movable furniture part, said damping device comprising a damper housing comprising at least two housing parts with at least one sealing ring disposed therebetween, One of the portions has a counterpart shape for retaining the seal ring. The present invention also relates to a furniture fitting having at least one damping device according to the invention and a method of manufacturing the same.

Certain types of damping devices are known in the prior art, for example in Austrian patent application A 1180/2012. The technical object to be achieved by the present invention relates to the fact that the relative shape for holding the seal ring has been optimized according to the prior art with respect to boundary conditions relating to production engineering. It is clear from the fact that this relative shape is in the form of a slot.

It has been found, however, that securing the seal ring to the relative configuration of such a configuration has a series of disadvantages: firstly, when the seal ring comprises a gap that does not correspond with respect to the mating configuration at different locations, The work is not achieved in the optimal form. Such inconsistent clearance creates a problem with the sealing integrity between at least two housing portions of the damper housing. Also, the wear phenomenon can thereby be promoted in the seal ring.

It is therefore an object of the present invention to provide an improved damping device which avoids disadvantages arising in the prior art and can be used, for example, in furniture fittings. At the same time, the present invention provides a method of manufacturing a damping device according to the present invention which is improved over the prior art.

Its object is achieved by the features of independent claims 1, 9 and 12.

Therefore, the basic idea of the present invention is that the cross-section of the relative shape has a different outline from the circular shape and has an exclusively positive curvature. Particularly, when the seal ring is formed in a stretched shape different from the circular shape, it has a great advantage that the relative shape can be reliably matched to the shape of the seal ring. In such a way, any clearance between the seal ring and the mating shape can be prevented, resulting in a further subsequent mounting being simplified, and sealing integrity being improved. Further, there is no abrasion phenomenon caused by the gap.

It should also be noted that the term, curvature, is clearly defined: the curvature of the curve specifies how large the tangent direction at the point on the curve changes when the point is displaced from left to right. We talk about positive curvature when the tangent turns counterclockwise according to the displacement of the point from left to right. The positive curvature can also be described by the term convex. In this case, the associated system is a seal ring, that is, as seen in the seal ring, or as compared to the seal ring, the mating profile has an outline with a unique positive curvature different from the circular shape in cross section.

As a requirement of a person having ordinary knowledge in the technical field relating to the designing of a relative shape, the sign relating to the curvature is provided without any change. Which considerably limits the number of possible shapes. For example, substantially elliptical or oval shapes can be considered in principle. It has proved to be particularly advantageous in the context of the present invention that the profile of the contour shape has at least one symmetry axis, preferably exactly two symmetry axes. Alternatively or additionally, the contour of the contour may have two convex portions having a first radius of curvature, said two convex portions having a second radius of curvature different from the first radius of curvature, Are connected by convex portions.

And in relation to the interior of the damper, the profile of the contour is advantageously in the direction of the largest extent, 1.5 to 2.5 times, preferably about twice the direction of the smallest extent Proven.

In particular, when the damping device whose outer size is relatively small is sealed, in other words, the contour of the counterpart shape is in the direction of the largest range, for example, 7.5 to 10.5 mm, preferably about 9 mm , It is possible to enjoy the advantages of the present invention.

As for the material of the seal ring, it has proved advantageous that the seal ring comprises substantially nitrile rubber (simple identification: NBR). The material has high resistance to oil, good aging characteristics and low wear rate.

Also, the mating profile for mounting the seal ring, which may be referred to as a sealing seat, is provided in a technically simple manner by having at least one groove shaped portion and / or at least one guide passage .

As already mentioned at the beginning of this specification, the damping device according to the invention is particularly suitable for use in furniture fittings to damp the movement of furniture fittings. In this regard, the furniture fitting may be, for example, a furniture hinge, wherein the furniture hinge in a known manner has a hinge cup connected to the hinge arm by at least one joint lever, Placed in a cup or placed in a hinge cup.

In addition, at least one fluid chamber having at least one piston displaceably mounted in the fluid chamber, preferably in a linear manner, is provided in the damper housing, and at the same time a driving device for displacing the piston during the damping stroke (Provided according to a preferred configuration of the invention) is provided, the actuating element movably mounted in the hinge cup can be actuated by the joint lever, and the actuating element is movably connected to a drive for displacing the piston .

As already stated, the method of manufacturing the damping device according to the present invention is also a claim to be protected, the method comprising:

- providing at least one circular seal ring,

Stretching the seal ring by a stretching device into a shape having a proprietary positive curvature different from the circular shape,

- mounting a stretched sealing ring to the mating profile, the cross-section of the mating shape having an outline corresponding to the stretched shape of the seal ring, the mating shape being disposed in a first housing portion of the damper housing; and

Assembling the first housing part to the second housing part, wherein the sealing ring is disposed in the two housing parts.

The contour of the stretched shape of the seal ring and the corresponding relative shape can be ascertained, for example, using a simulation program or by simple attempt. It also naturally follows the structure of the stretching device.

Further details and advantages of the present invention are described in more detail with reference to the embodiments shown in the drawings:
Figure 1 shows a schematic perspective view of a furniture article.
Figure 2 shows a schematic perspective view of a furniture hinge.
Figure 3 shows a schematic exploded view of a damping device according to a preferred embodiment.
Figures 4a and 4b show cross sections of the damping device in two operating positions.
Figure 5a shows a schematic perspective and side view of a circular seal ring.
Figures 5b and 5c schematically show two operating positions of the stretching device for stretching the seal ring, respectively.
Figure 5d shows a schematic perspective and side view of a stretched seal ring.
Figure 5e shows a schematic perspective view of a first housing portion of the damping device in combination with a stretched seal ring.
Figures 6a and 6b show schematic side views of a first housing part with and without a sealing ring.
Figures 7a and 7b show schematic cross-sectional views in which the seal ring and the mating shape are combined, wherein Figure 7b illustrates the prior art.

Figure 1 includes a movable furniture part 2 in the form of a furniture door 37 and a furniture door which is pivotally connected to the furniture body 37 by means of two furniture fittings 19 in the form of a furniture hinge A furniture product 36 in the form of a cabinet.

It can be seen from Fig. 2 that the furniture hinge 19 has a hinge cup 20 connected to the hinge arm 22 by a joint lever 21. [ In this arrangement, the hinge arm 22 can be releasably connected to the furniture body 37, for example by a screw, and the hinge cup 20 can be connected to the flange 25 Can be connected to the furniture door (2) by fastening means, for example in the form of a screw. A damping device according to a preferred embodiment of the present invention is disposed on the side surface of the hinge cup 20 and shows only a front region of the drive shaft 18 as a part of the damping device, 18 are movably connected to an actuating element 23 movably mounted on the hinge cup 20 and the actuating element 23 is movable between a final position of the closing movement of the furniture hinge 19, ). &Lt; / RTI >

The exact structure of the damping device 1 arranged on the hinge cup 20 can be seen in figure 3: here a damper housing is provided comprising two housing parts 3 and 4, A seal ring 5 is arranged between the first and second housing parts 3 and 4 and the first housing part 3 has a counter shape 6 in the form of a guide passage for mounting the seal ring. The damper housing is provided with a fluid chamber (15) having a piston (16) displaceably mounted linearly in the fluid chamber (15). There is also a drive device for displacing the piston 16 during a damping stroke, the drive device comprising a contact portion 17 and a drive shaft 18, which actuates the actuating element 23 To the motion of the piston 16 in the fluid chamber 15. The damping action occurs in this way. The return spring 28 ensures that the piston 16 moves back to its starting position after the damping stroke is generated. An additional seal 27 is disposed between the first housing portion 3 and the drive shaft 18. The gap with respect to the drive shaft 18 in the longitudinal direction thereof is further prevented by the cover 26. [

Figs. 4A and 4B show cross sections of two operating positions of the damping device 1. Fig. In the operating position shown in Figure 4a, the piston 16 is in the starting position of the damping stroke. In the illustrated embodiment, the piston 16 is constructed in two parts, the piston 16 including an inner piston and a sleeve disposed in the inner piston. In order to operate the piston 16, a moveably mounted drive part 17 comprising a lever arm is arranged, which lever arm cooperates with the housing part of the piston 16. The driving portion 17 is movably connected to the actuating element 23 shown in Fig. 2 by a driving shaft 18, so that the rotation of the actuating element 23 causes rotation of the driving portion 17. Thus, in the damping stroke, the drive portion 17 is pivoted relative to the rotational axis 18, in which case the lever arm of the drive portion 17 presses the piston into the fluid chamber 15. The maximum position reached in that case is shown in Fig. 4B. After the damping stroke is generated, the piston 16 can be returned to the intended ready position for the next damping stroke by the force of the return spring 28.

A method of manufacturing a damping device is schematically described with reference to the sequence of Figures 5A to 5E: In a first method step, a circular seal ring 5 is provided, which comprises an elastic material, preferably nitrile rubber. In the next step, the sealing ring 5 is stretched by the stretching device 24 in a shape which differs from the circular shape and is composed of an exclusive positive curvature (see FIGS. 5b and 5c), wherein the stretching device 24 For example, two semi-cylindrical components 29 and 30, the two semi-cylindrical components being combined to form a complete cylindrical configuration in the first operating position (see FIG. 5b) (See Fig. 5C). The stretched shape of the seal ring 5 after stretching by the stretching device 24 is shown in Figure 5d. The details of the shape will be described in more detail with reference to FIG. 7A. In a third method step the stretched seal ring 5 is mounted on the mating configuration 6 and the cross section of the mating configuration has an outline corresponding to the stretched configuration of the seal ring 5, Is disposed in the first housing portion 3 of the damper housing (see Fig. 5E). In a final step, the first housing part 3 is fixed with the second housing part, in particular in such a way that the sealing ring 5 is arranged between the two housing parts.

Figures 6a and 6b show in particular a front view of the first housing part 3 of the damper housing with the sealing ring 5 in Figure 6a and the sealing ring 5 in Figure 6b.

In order to more precisely describe the arrangement of the mating ring 6 and the mating ring 5, all the other components are omitted in Fig. 7A, compared to Fig. 6B. From this explanation, it can clearly be seen that the cross-section of the outline of the mating shape 6 on which the seal ring 5 is mounted is different from the circular shape and has an exclusive positive curvature.

In order to clarify this fact, it should be noted that the arrangement comprises a positive curvature with respect to the sealing ring 5 or from the sealing ring 5, As shown in FIG. When the point 32 moves from left to right with the associated tangent line 31 (see arrow 33), the tangent line 31 rotates counterclockwise at any point, particularly at any point in the contour of the mate 6 In other words, the cross-section of the profile of the contour 6 has an exclusive positive curvature.

7A, the contour of the counter-shape 6 also has two symmetrical axes 7,8. The outline of the mate 6 can also be divided into two opposing convexes 9, 10 having a first radius of curvature, the two convexes being arranged between them and having a first radius of curvature Can be connected by two convex portions (11, 12) having different second curvature radii. Finally, in the illustrated embodiment, the contour of the mate 6 in the direction of the largest extent 13 is approximately twice the size in the direction of the smallest extent 14. The figures are shown at a constant rate. However, in fact from the absolute point of view, the contour of the contour 6 in the largest range direction is actually about 9 mm in size.

Also, as can be seen in Figure 7a, the sealing ring 5 can be supported in a precise fixed relationship with respect to the mating shape 6, i.e. there is no clearance that causes the problems described in the introductory part of this specification. In comparison with this, Fig. 7b shows the prior art in which the sealing ring 5 is provided in the slotted shape 34. As can be seen in the enlarged portion, the sealing ring 5 has a considerable gap 35 in the straight portion of the mating shape 34.

Finally, it should be noted that circular seal rings separated in two opposite directions have a natural linear portion that occasionally occurs in a marginal situation. The arrival of such a limit situation is highly dependent on the material properties of the seal ring.

The stretched shape of the seal ring of the present invention will be set to an intermediate shape between a pure circular shape and a shape having a linear portion that reaches a limit state.

Claims

A damping device (1) for a movable furniture part (2), said damping device comprising a damper housing (3) comprising at least two housing parts (3, 4) in which at least one sealing ring , Wherein one of the two housing parts (3) has a mating shape (6) for mounting the seal ring (5), the damping device comprising:
The cross-section of the relative shape (6) is different from the circular shape and has an exclusive positive curvature contour, the contour of which has two convex portions (9, 10) with a first radius of curvature, Wherein the two convex portions are connected by two convex portions (11, 12) having a second radius of curvature different from the first radius of curvature.

2. A damping device as claimed in claim 1, characterized in that the contour of the mating shape (6) has at least one symmetrical axis (7, 8).

3. A damping device as claimed in claim 2, characterized in that the contour of the mating shape (6) has two symmetrical axes.

2. A damping device as claimed in claim 1, characterized in that the contour of the mating shape (6) is in the direction of the largest extent (13) 1.5 to 2.5 times the direction of the smallest extent (14).

2. A damping device according to claim 1, characterized in that the profile of the mating shape (6) is 7.5 mm to 10.5 mm in the direction of its largest extent (13).

The damping device according to claim 1, characterized in that the sealing ring (5) comprises nitrile rubber.

2. A damping device according to claim 1, characterized in that said mating profile (6) has at least one groove-shaped part and / or at least one guide passage.

8. A damper according to any one of claims 1 to 7, wherein at least one fluid chamber (15) having at least one piston (16) displaceably mounted in the fluid chamber (15) is provided in the damper housing, And a drive device (17, 18) for displacing said piston (16) during a damping stroke is provided.

Furniture fitting (19) having at least one damping device (1) according to any one of claims 1 to 7 for damping the movement of furniture fitting (19).

The furniture fitting according to claim 9, characterized in that the furniture fitting (19) is in the form of a furniture hinge having a hinge cup (20) connected to the hinge arm (22) by at least one joint lever (21) Characterized in that the device (1) is arranged in the hinge cup (20) or in the hinge cup (20).

11. A method as claimed in claim 10, wherein at least one fluid chamber (15) having at least one piston (16) displaceably mounted in the fluid chamber (15) is provided in the damper housing, The operating element 23 movably mounted on the hinge cup 20 is actuated by the joint lever 21 and the actuating element 23 ) Are movably connected to drive devices (17, 18) for displacing said piston (16).

A manufacturing method of a damping device (1) according to any one of claims 1 to 7,
- providing at least one circular sealing ring (5)
- stretching the seal ring (5) in a shape having an exclusive positive curvature different from the circular shape by means of a stretching device (24)
- mounting the stretched seal ring (5) to a mating shape (6), the mating ring (5) having an outline corresponding to the stretched shape of the seal ring (5) Is disposed in the first housing portion (3) of the damper housing, and
- assembling the first housing part (3) to the second housing part (4), characterized in that the sealing ring (5) is arranged in the two housing parts (3, 4) Of the damping device.

5. A damping device according to claim 4, characterized in that the contour of the mating shape (6) is twice as large as the direction of the smallest range (14) in the direction of the largest range (13).

6. A damping device according to claim 5, characterized in that the contour of the mating shape (6) is 9 mm in the direction of its largest extent (13).

9. A damping device according to claim 8, characterized in that the piston (16) is mounted linearly displaceably in the fluid chamber (15).