CN209825846U

CN209825846U - Furniture buffer and furniture fitting

Info

Publication number: CN209825846U
Application number: CN201821101531.XU
Authority: CN
Inventors: C·格茨; B·克拉默尔; F·菲舍尔
Original assignee: Unisys Co Ltd Blum Si
Current assignee: Unisys Co Ltd Blum Si; Julius Blum GmbH
Priority date: 2017-07-13
Filing date: 2018-07-12
Publication date: 2019-12-24
Anticipated expiration: 2028-07-12
Also published as: AT17733U1; DE202018103820U1

Abstract

The invention relates to a furniture damper (16) for damping the movement of a movably mounted furniture part (3) or a movably mounted furniture fitting part, in order to overcome the disadvantages of the prior art in which a long piston rod bends or even buckles under high loads, comprising: a housing (19); at least one fluid chamber (19a) formed in the housing; at least one piston (20); a piston rod (21) having a longitudinal direction (L), wherein the piston rod is connected to the piston, wherein at least one stabilizing element (24) is provided in the fluid chamber (19a), which stabilizing element has an opening (24a) for movably receiving the piston rod (21), such that the piston rod can be stabilized in a direction transverse to the longitudinal direction (L) of the piston rod when a damping stroke is performed.

Description

Furniture buffer and furniture fitting

Technical Field

The present invention relates to a furniture damper for damping the movement of a movably mounted furniture part or a movably mounted furniture fitting part, comprising:

-a housing for the housing,

at least one fluid chamber formed in the housing,

at least one piston which is movably arranged in the fluid chamber between a first end position and a second end position for performing a damping stroke,

-a piston rod having a longitudinal direction, wherein the piston rod is connected with the piston.

The invention further relates to a furniture fitting, in particular a drawer extension guide, a furniture hinge or a furniture drive for moving or driving a furniture part which is mounted movably relative to a furniture body.

Background

The piston rod transmits a tractive force or a pressure force to a piston which is movable in the fluid chamber, wherein the movement of the piston can be braked by a damping medium which is located in the fluid chamber, in particular hydraulic. In this way, the movement of the furniture part and/or of the movably mounted furniture fitting part can be damped, so that impact noises and mechanical stresses occurring when the movable furniture part (door, drawer or table) is closed by force can be reduced as far as possible.

When the damping stroke increases, a correspondingly long piston rod is provided, which (in particular in the case of an elongated design) bends or even buckles under high loads.

SUMMERY OF THE UTILITY MODEL

The object of the invention is to provide a furniture buffer of the type mentioned at the outset, in which the disadvantages discussed above are overcome.

According to the invention, this is achieved by a furniture damper for damping the movement of a movably mounted furniture part or a movably mounted furniture fitting part, comprising:

-a housing for the housing,

at least one fluid chamber formed in the housing,

at least one piston, which is arranged movably in the fluid chamber between a first end position and a second end position for performing a damping stroke,

a piston rod having a longitudinal direction, wherein the piston rod is connected with a piston,

wherein at least one stabilizing element is provided in the fluid chamber, said stabilizing element having an opening for movably receiving the piston rod, such that the piston rod is stabilized in a direction transverse to the longitudinal direction of the piston rod when performing said damping stroke.

Therefore, according to the invention, at least one stabilizing element is provided in the fluid chamber, which stabilizing element has an opening for movably receiving the piston rod, so that the piston rod can be stabilized in a direction transverse to the longitudinal direction of the piston rod when the damping stroke is performed.

At least one stabilizing element having an opening through which the piston rod is guided in a movable manner is therefore provided in a region spaced apart from the two end positions of the piston rod. The risk of the piston rod bending or buckling during the damping stroke can be reduced or prevented by the stabilizing element. However, two or more stabilizing elements may also be provided, which are arranged in the fluid chamber at a distance from one another in the longitudinal direction of the piston rod.

Provision is preferably made for the opening of the stabilizing element to have a size which substantially corresponds to the diameter of the piston rod, so that the piston rod is guided precisely in the longitudinal direction. In this case, it can be provided that the piston rod is supported so as to be slidable on the edge of the preferably circular opening of the stabilizing element.

According to one embodiment, it can be provided that the stabilizing element bears at least partially against an inner wall of the fluid chamber. Suitably, the stabilizing element may have two or more mutually spaced-apart regions, each of which bears against an inner wall of the fluid chamber. For a compact design, it may be advantageous if the regions of the stabilizing elements that are spaced apart from one another are arranged in a common plane.

According to a preferred embodiment of the invention, the stabilizing element has at least one recess for the passage of a damping fluid arranged in the fluid chamber.

According to a preferred embodiment of the invention, the stabilizing element has at least one peripheral-side recess for the passage of a damping fluid arranged in the fluid chamber.

According to a preferred embodiment of the invention, the stabilizing element has two or more recesses for the passage of a damping fluid.

According to a preferred embodiment of the invention, the first end position corresponds to a moved-out position of the piston rod relative to the fluid chamber and the second end position corresponds to a pushed-in position of the piston rod relative to the fluid chamber, wherein the stabilizing element is arranged closer to the first end position than the second end position.

According to a preferred embodiment of the invention, the stabilizing element is disk-shaped.

According to a preferred embodiment of the invention, the volume of the fluid chamber can be changed by a movement of the piston rod between the first end position and the second end position, and the furniture damper has a deformable or movable compensation device for compensating the volume of the fluid chamber.

According to a preferred embodiment of the invention, the compensating device has a sealing element which can be loaded by a compression spring and which is mounted inside the fluid chamber so as to be movable along the piston rod.

According to a preferred embodiment of the invention, the movement of the sealing element in the longitudinal direction can be limited by the stabilizing element.

According to a preferred embodiment of the invention, the stabilizing element is mounted within the fluid chamber so as to be movable in a limited manner in the longitudinal direction.

According to a preferred embodiment of the invention, the fluid chamber has a stop surface for limiting the movement of the stabilizing element inside the fluid chamber.

According to a preferred embodiment of the invention, the stop surface is formed by a tapering of the fluid chamber.

According to a preferred embodiment of the invention, a blocking element is provided for the fluid-tight blocking of the fluid chamber, wherein the piston rod is guided through the blocking element, and the at least one stabilizing element is arranged in the region between the blocking element and the piston.

The utility model discloses still relate to a furniture accessory, it has at least one furniture bumper.

According to a preferred embodiment of the invention, the furniture fitting is designed as a drawer extension guide, as a furniture hinge or as a furniture drive for moving a furniture part mounted movably relative to a furniture body.

Due to the compact design and for economical manufacturability, it may be advantageous if the at least one stabilizing element is designed as a disk.

Drawings

Further details and advantages of the invention emerge from the following description of the figures. In the drawings:

fig. 1 shows a perspective view of a piece of furniture having a furniture body and a drawer mounted so as to be movable relative to one another;

FIG. 2 shows a drawer pull-out guide having a drawer rail to be connected to a drawer side wall;

FIGS. 3 a-3 c show the furniture damper in an exploded view and in two enlarged detail views;

fig. 4a, 4b show the furniture damper in a perspective cross-sectional view and in an enlarged detail view.

Detailed Description

Fig. 1 shows a piece of furniture 1 having a cabinet-like furniture carcass 2, wherein a movable furniture part 3 in the form of a drawer is mounted so as to be movable relative to the furniture carcass 2 via a drawer extension guide 4. The drawer has a front panel 5, a drawer bottom panel 6, drawer side walls 7 and a back wall 8, respectively. The drawer pull-out guide 4 comprises a body rail 9, which is to be fastened to the furniture body 2 via fastening sections 12a, 12b, a drawer rail 10, which is mounted so as to be movable relative to the body rail 9 and is connected or connectable to the drawer side wall 7, and optionally an intermediate rail 11, which is mounted so as to be movable between the body rail 9 and the drawer rail 10 in order to enable a full pull-out of the drawer.

Fig. 2 shows the drawer extension guide 4 and the drawer side wall 7 to be connected to the drawer rail 10 in a perspective view. A movable intermediate rail 11 is provided between the drawer rail 10 and the main body rail 9, wherein a coupling element 13 is provided on the drawer rail 10, which coupling element can be detachably coupled to a spring-loaded catch 14 of the retraction device 15, so that the drawer rail 10 is caught by the catch 14 towards the end of the closing movement and can be retracted into the closed end position by an energy store of the retraction device 15. The spring-assisted retraction movement of the drawer rail 10 into the closed end position can be braked by a furniture damper 16 with a preferably hydraulic piston-cylinder unit to be described further.

The drawer side wall 7 is designed as a hollow-chamber profile with an inner profile wall 7a and an outer profile wall 7b, wherein the drawer side wall 7 has a channel 17 which is open at the bottom and extends in the longitudinal direction of the drawer side wall 7 and is used to accommodate the drawer rail 10. The drawer side wall 7 also has a first fastening means 38a for connection with the back wall 8, a second fastening means 38b for connection with the front panel 5 and a bracket 18 for supporting the drawer bottom 6.

Fig. 3a shows the furniture damper 16 in an exploded view. The furniture damper 16 has a housing 19, for example, cylindrical, in which a fluid chamber 19a is formed for the displaceable mounting of a piston 20. The piston 20 is connected to a piston rod 21 which is guided outwards by the housing 19, wherein the piston 20 is movably supported inside the fluid chamber 19a in the longitudinal direction L of the piston rod 21 between a first end position and a second end position. When the damping stroke is performed, the piston 20 can be braked against the resistance of a preferably hydraulic damping fluid located in the housing 19. The piston 20 can be constructed in one piece or in several pieces. The volume of the fluid chamber 19a can be varied by a movement of the piston rod 21 between the first end position and the second end position, wherein a deformable or movable compensation device 23 is provided for compensating the volume of the fluid chamber 19 a. At least one stabilizing element 24 is arranged in the fluid chamber 19a, which stabilizing element has an opening 24a for movably receiving the piston rod 21, so that the piston rod 21 can be stabilized in a direction transverse to the longitudinal direction L of the piston rod 21 when a damping stroke is performed. In this way, the piston rod 21 is guided precisely in the longitudinal direction L, whereby the piston rod 21 is prevented from bending or buckling when it is moved in the longitudinal direction L. For fluid-tight locking of the fluid chamber 19a, a locking element 22 is provided.

Fig. 3b shows the area a circled in fig. 3a in an enlarged view. The compensating device 23 can either comprise a compressible material block (e.g., a sponge) or alternatively (as shown in the figures) comprise a seal 23c which can be acted upon by a compression spring 23a and which is mounted inside the fluid chamber 19a so as to be displaceable along the piston rod 21. The seal 23c can be supported on the bearing 23b opposite the compression spring 23 a. The size of the opening 24a of the preferably disc-shaped stabilizing element 24 substantially corresponds to the diameter of the piston rod 21. The stabilization element 24 rests at least in regions against the inner wall of the fluid chamber 19a and has at least one preferably circumferential recess 26a for the passage of a buffer fluid arranged in the fluid chamber 19 a. In the embodiment shown, the stabilization element 24 is provided with two or more recesses 26a, 26b, 26c for the passage of a damping fluid. The stabilization element 24 can be mounted either fixedly or in a manner that is movable in a limited manner in the longitudinal direction L within the fluid chamber 19 a.

Fig. 3c shows the area B circled in fig. 3a in an enlarged view. The piston 20 comprises interconnected piston parts 20c, 20d and an overload safety 25 with a locking part 20b, which is pretensioned by an overload spring 20 a. The piston 20 has at least one overload channel which is blocked by a blocking element 20b when a predetermined pressure is applied to the piston 20. Above a predetermined pressure load on the piston 20, the blocking element 20b is moved against the force of the load spring 20a, so that the overload channel of the piston 20 is released for the passage of the damping fluid. In this way, a rapid pressure drop in the fluid chamber 19a is caused without damaging the housing 19, the piston 20 or other components of the furniture damper 16. During the damping stroke, the passage of the piston 20 is blocked by a switching ring 20e which is movable relative to the piston parts 20c, 20d, so that the piston 20 opposes the damping fluid with high resistance when moving in the direction 29 of the piston stroke (fig. 4 a). On the other hand, when moving counter to the direction 29 of the damping stroke, the switching ring 20e moves into a position in which the passage of the piston 20 is released, so that the piston 20 only opposes the damping fluid with a low resistance and the piston rod 21 can be pulled out of the housing 19 again quickly.

Fig. 4a shows the furniture damper 16 in a perspective cross section. A fluid chamber 19a for movably supporting the piston 20 is formed in the housing 19. The path-dependent control of the damping force can be brought about by flow channels 27a, 27b provided on the inner wall of the housing 19. The flow channels 27a, 27b can be designed such that the effective flow cross section in the direction of the damping stroke is reduced. In this way, the deeper the piston 20 is pushed into the housing 19, the higher the flow resistance of the damping fluid and thus the damping force. The piston rod 21 is guided through the locking part 22, the compression spring 23a, the bearing 23b and the seal 23c of the compensating device 23 and through the stabilizing element 24 and is connected to the piston 20. The piston 20 is movably supported between a first end position (which corresponds to a moved-out position of the piston rod 21 relative to the fluid chamber 19a) and a second end position (which corresponds to a pushed-in position of the piston rod 21 relative to the fluid chamber 19a), wherein the stabilizing element 24 is arranged closer to the first end position than the second end position.

Fig. 4b shows the area enclosed in fig. 4a in an enlarged view. When the piston 20 is moved in the direction 29 of the damping stroke, the piston rod 21 is pushed into the fluid chamber 19a, wherein an additional volume of the piston rod 21 can be compensated by the compensation device 23. This is achieved in that the fluid pressure presses the seal 23c against the force of the compression spring 23a and thus compensates for the additional volume of the piston rod 21. In the exemplary embodiment shown, the stabilization element 24 is only limitedly movable within the fluid chamber 19a on the first partial path S1, wherein the housing 19 has a stop surface 28 for limiting the movement of the stabilization element 24. In the exemplary embodiment shown, the stop face 28 is formed by a taper of the fluid chamber 19a, wherein the taper is configured with an annular bevel. In this way, the stabilizing element 24 is movably supported only along the first sub-path S1. The flow channels 27a, 27b are arranged along a second partial path S2, wherein the stop surface 28 prevents the entry and thus the possible jamming of the seal 23c with the flow channels 27a, 27 b.

Fig. 2 shows a combination of a furniture damper 16 and a furniture fitting in the form of a drawer extension guide 4. However, the furniture damper 16 can also be used with other furniture fittings, for example furniture hinges or furniture drives for moving a furniture part 3 which is mounted movably relative to a furniture body 2.

Claims

1. Furniture damper (16) for damping the movement of a movably mounted furniture part (3) or a movably mounted furniture fitting part, comprising:

-a housing (19),

at least one fluid chamber (19a) formed in the housing (19),

-at least one piston (20) movably arranged in the fluid chamber (19a) between a first end position and a second end position for performing a damping stroke,

a piston rod (21) having a longitudinal direction (L), wherein the piston rod (21) is connected with a piston (20),

characterized in that at least one stabilizing element (24) is provided in the fluid chamber (19a), said stabilizing element having an opening (24a) for movably receiving the piston rod (21), such that the piston rod (21) can be stabilized in a direction transverse to the longitudinal direction (L) of the piston rod (21) when performing the damping stroke.

2. Furniture damper according to claim 1, characterized in that the opening (24a) of the stabilizing element (24) has a size substantially corresponding to the diameter of the piston rod (21).

3. Furniture damper according to claim 1, characterized in that the stabilizing element (24) bears at least partially against an inner wall of the fluid chamber (19 a).

4. Furniture damper according to one of claims 1 to 3, characterized in that the stabilizing element (24) has at least one recess (26a) for the passage of a damping fluid provided in the fluid chamber (19 a).

5. Furniture damper according to one of claims 1 to 3, characterized in that the stabilizing element (24) has at least one peripheral-side recess (26a) for the passage of a damping fluid provided in the fluid chamber (19 a).

6. Furniture buffer according to claim 4, characterized in that the stabilizing element (24) has two or more recesses (26a, 26b, 26c) for passing through a damping fluid.

7. Furniture damper according to any of claims 1-3, characterized in that the first end position corresponds to a moved-out position of the piston rod (21) relative to the fluid chamber (19a) and the second end position corresponds to a pushed-in position of the piston rod (21) relative to the fluid chamber (19a), wherein the stabilizing element (24) is arranged closer to the first end position than the second end position.

8. Furniture damper according to one of claims 1 to 3, characterized in that the stabilizing element (24) is configured disc-shaped.

9. Furniture damper according to one of claims 1 to 3, characterized in that the volume of the fluid chamber (19a) can be changed by a movement of the piston rod (21) between the first end position and the second end position, and in that the furniture damper (16) has a deformable or movable compensation device (23) for compensating the volume of the fluid chamber (19 a).

10. Furniture damper according to claim 9, characterized in that the compensating device (23) has a seal (23c) which can be loaded by a compression spring (23a) and which is mounted displaceably along the piston rod (21) inside the fluid chamber (19 a).

11. Furniture damper according to claim 10, characterized in that the movement of the sealing element (23c) in the longitudinal direction (L) can be limited by the stabilizing element (24).

12. Furniture damper according to any of claims 1 to 3, characterized in that the stabilizing element (24) is supported within the fluid chamber (19a) in a limited movable manner in the longitudinal direction (L).

13. Furniture damper according to claim 12, characterized in that the fluid chamber (19a) has a stop surface (28) for limiting the movement of the stabilizing element (24) inside the fluid chamber (19 a).

14. Furniture damper according to claim 13, characterized in that the stop surface (28) is constituted by a tapering of the fluid chamber (19 a).

15. Furniture damper according to one of claims 1 to 3, characterized in that a blocking part (22) for fluid-tightly blocking the fluid chamber (19a) is provided, wherein the piston rod (21) is guided through the blocking part (22) and the at least one stabilizing element (24) is provided in the region between the blocking part (22) and the piston (20).

16. Furniture fitting, characterized in that it has at least one furniture bumper (16) according to one of claims 1 to 15.

17. Furniture fitting according to claim 16, characterized in that the furniture fitting is configured as a drawer pull-out guide (4), as a furniture hinge or as a furniture drive for moving a furniture part (3) movably mounted relative to a furniture body (2).