EP3126708A1

EP3126708A1 - Device for damping movement

Info

Publication number: EP3126708A1
Application number: EP15703938.9A
Authority: EP
Inventors: Boris Kruedener; Gabriele Schneider
Original assignee: Grass GmbH Deutschland
Current assignee: GRASS GmbH
Priority date: 2014-03-31
Filing date: 2015-02-03
Publication date: 2017-02-08
Also published as: US20170037668A1; WO2015149967A1; US10161173B2; CN106460989A; DE202014101503U1; CN106460989B

Abstract

The invention relates to a device (1) for damping movement, in particular a mobile piece of furniture, having a bearing housing (2). According to the invention, a movement sensor (3) is movably mounted and a rotating element (8) is rotatably mounted on the bearing housing (2), comprising gear means (4, 5, 6) by means of which a movement of the movement sensor (3) can be transferred into a rotational movement of the rotating element (8), wherein the bearing housing (2) has a chamber into which at least one plunging section of the rotational element (8) reaches, wherein there is a damping fluid in the chamber.

Description

"Motion damping device"

The invention relates to a device for motion damping, in particular a movable furniture part according to the preamble of claim 1.

Devices for motion damping are known in particular from the field of furniture in various designs. For example, a damping device may comprise two mutually movably mounted elements, for example, which are pressed together with a predetermined force perpendicular to their direction of movement relative to each other to provide a damping by a corresponding adhesive or Gleitreibungswirkung. Furthermore, it is known that

Damping devices a cylinder with one in it

guided piston, wherein in a piston or

between the pistons and a cylinder inner wall

Passages are present through the one

Damping medium, for example, a gas, in accordance

limited manner can flow through. During movements of the piston relative to the cylinder, the passage openings limit a pressure equalization between the cylinder volume in front of and behind a piston in the cylinder interior, thereby leading the Damping effect. The corresponding

However, damping devices have a required space, which can be reduced with the present invention.

The object of the present invention is therefore to provide a device for damping movement, which can perform comparatively space-saving with the same damping effect.

The object is achieved with a device having the features of claim 1.

Advantageous and preferred embodiments of the invention are set forth in the dependent claims.

The invention relates to a device for

Motion damping, in particular a movable furniture part with a bearing housing. The essence of the invention is that on the bearing housing, a motion sensor is movably mounted and that in the bearing housing a

Rotary element is rotatably mounted, and that the device comprises gear means with which movement of the

Movement transducer is transferable in a rotational movement of the rotary member, wherein the bearing housing has a chamber into which extends at least a dipping portion of the rotary member, wherein in the chamber, a damping fluid is present. Preferably, the transmission means are in and / or on the

Bearing housing arranged, wherein they can be stored directly and / or indirectly in or on the bearing housing. The chamber of the bearing housing, in which the damping fluid is present, is preferably used together with the immersion portion of the rotary member for damping a movement of the

Movement transducer provided. For this is the

Motion sensor preferably coupled via the gear means with the rotary member.

The intermediate space to each other movable, in particular

rotatable parts, an inner wall of the chamber and the Dipping portion of the rotary member may be completely filled with the damping medium, for example. The

However, presence of the damping fluid may also be such that the chamber and the immersion section, when moving relative to one another, promote the damping fluid through the clearance.

The damping fluid, for example, a viscous

Liquid, for example an oil or a dispersion, be. The device according to the invention has the advantage that a shear stress in a liquid can be maintained in a relatively small space by rotational movement virtually in a continuous range of motion, with which a damping force can be generated. The gap, for example, between an inner wall of the chamber and an outer surface of the immersion portion and the rotary member, respectively

preferably in a radial direction perpendicular to

Rotational axis of the rotary member by a correspondingly high shear stress in the. With a comparatively high speed difference between chamber wall and immersion section

Damping fluid can be generated. For the damping fluid may also be provided a gap which is arranged primarily between end faces of the chamber and the immersion portion, and which are opposite to each other in the axial direction with respect to the axis of rotation.

Preferably, the damping fluid in the chamber performs a clearance between an outer surface of the immersion portion and an inner surface of the chamber.

A preferred embodiment of the invention is that a cross section of the inner surface of the chamber has an irregular curvature about a geometric center. A

For example, irregular curvature may be in the form of a corner or edge on the interior surface of the chamber. As the plunger portion of the rotating member rotates relative to the chamber, the irregular curvature of the inner surface of the chamber increases in places

Flow velocity through, for example Cross-sectional narrowing or, for example, cause turbulence. In this case, a cross section of the chamber perpendicular to the axis of rotation, for example, polygonal, in particular as

regular polygon, be shaped. The cheeky, the inner surface of the chamber may have a thread-like surface profile, for example by a transverse to the rotational movement of the rotary member flow component of the

Damping fluids to achieve an additional increase in shear stress. In this case, advantageously, a back pressure within the chamber can be generated.

Similarly, a cross section of the

Immersion element, which is located transversely, in particular perpendicular to the axis of rotation, having an irregular curvature about the axis of rotation, to achieve advantageous effects similar to an irregularly curved inner surface of the chamber.

A further preferred embodiment of the invention is that the rotary member and in particular the immersion portion, in particular its axis of rotation eccentric to a

Is arranged symmetry axis of the inner surface of the chamber, wherein the axis of symmetry is located in particular parallel to the axis of rotation. In this way, an annular gap with different or varying width can be formed even with circular cross-sections. The

eccentric arrangement of the axis of rotation with respect to

Symmetryeachse the chamber allows a symmetrical behavior with respect to the directions of rotation of the dipping section within the chamber.

The gear means may comprise a rotatably mounted to the bearing housing gear member which is rotatably coupled to the rotary member. Thereby are movements of the

Movement transducer in opposite directions can be damped.

A preferred embodiment of the invention provides that the gear means a rotatably mounted to the bearing housing

Gear element comprise, which is coupled via an overrunning clutch with the rotary member such that in one predetermined rotational direction of a higher torque than in an opposite direction of rotation of the transmission element on the

Rotary element is transferable. Preferably, the

Freewheel clutch designed such that in the given direction of rotation a torque is transferable, whereas in the opposite direction of rotation no damping and the

Dampfungsfluid is effective. If, for example, the

Movement sensor is not permanently connected to a movable furniture part to be damped, this embodiment has the advantage that the motion sensor, for example, in a closing movement can transmit damping forces on the furniture part and yet at an opening movement

can follow the furniture part comparatively quickly.

In principle, the device may also comprise an overrunning clutch of a type which allows power transmission in only one predetermined linear direction of force. For this purpose, the one-way clutch may be formed, for example, in the form of a ratchet with a serrated row and with a movable, adjacent pawl.

For example, to provide space for further gear elements within the bearing housing, the gear element may have a hollow cylindrical portion which is arranged parallel to the axis of rotation.

Preferably, the Bewegungsaufnehmer is a plunger, alternately on a front side of the bearing housing on a predetermined path of movement on the bearing housing and out

is movable into it. The trajectory is preferably

straight. Furthermore, the movement path may be curved, for example, circular arc. To avoid having the motion sensor with a furniture part within the

Bearing housing must be kept, the device preferably has a stop which limits an extending movement of the Bewegungsaufnehmers. In addition, one can

retracting motion of the motion recorder by a

Stop be limited to the device.

To avoid that the Bewegungseaufnehmer, in particular the Tappet drills into a surface of a movable furniture part over a longer period of use, it is preferred that the bearing housing a guide portion

is formed, on which the plunger in opposite

Direction along a predetermined trajectory is movable, wherein a rotational movement of the plunger around a

Movement path, in particular with respect to the bearing housing, is blocked. The guide portion also has the advantage that can be generated by moving the plunger torque, which drives the rotary member only one rotation and prevents counter-rotation of the plunger.

For an advantageous space-saving generation of a

Rotary movement for driving the rotary member include the

Gear means a helical guide slot.

This can save space a forward and backward movement of the

Movement transducer along the predetermined path of movement advantageously be converted into a rotational movement to drive the rotary member.

Furthermore, the transmission means may have a second

Include guide slot, which has a along the axis of rotation parallel guide profile. The

Guide profile, for example, as a slot-shaped

Wall opening of a hollow cylinder, for example a

Gear element, be formed. This can be a

Avoid counter-rotational movement of a driving part in the drive of the rotary member.

Preferably, the gear means comprise a driver element which can engage in the helical guide slot. In this case, the driver element for driving the

be provided helical guide slot. To the

Example, by the driver element is in particular firmly connected to the Bewegungsaufnehmer. Likewise, that can

Mitnehmerelement rotatably connected to the rotary member and by a linear movement of the guide slot along the screw axis, the driver element and the rotary member in Set the rotation.

The driver element may be a pin which is on

Movement sensor, in particular on the plunger, is attached to a fixed position. In this case, the pin protrude laterally on the plunger and in this case engage in the first, possibly in the second guide slot. In this case, the pin falls into movements of the movement receiver, in particular of the plunger.

The helical guide slot can be formed for example on the transmission element.

Furthermore, the parallel to the axis of rotation extending

Guide profile, so the second guide profile, on

Be formed transmission element.

Furthermore, the first guide slot or the second guide slot can be firmly connected to the bearing housing.

Preferably, the damping fluid is a non-Newtonian, in particular dilatant fluid. This offers the advantage that a user is not affected by the non-linear damping behavior of the

Device can feel relatively quickly when there is an increased risk of overloading of the damping device.

Because the device according to the invention can be constructed comparatively compact, is on a piece of furniture, which is equipped with the invention, more space available. Of

Furthermore, the device according to the invention is visually less noticeable on furniture equipped with it.

The invention will be described in more detail below

Embodiments described and with the help of

Drawings explained. The drawings are not to scale. Corresponding features are shown in the figures

uniformly denoted by the same reference numerals. 1 shows a schematic perspective view of a damper according to the invention,

FIG. 2 shows a schematic perspective view of the damper with the ram extended,

Figure 3 is a schematic perspective

Exploded view of the steamer,

Figure 4 is a schematic side view of

damper

FIG. 5 shows a schematic lateral sectional view in a sectional plane which runs perpendicular to the plane of the paper through an axis A-A in FIG.

FIG. 6 shows a schematic cross-section of the damper in a sectional plane which runs through the axis B-B of FIG. 5 perpendicular to the plane of the paper,

Figure 7 is a schematic side view of a second

Embodiment of a damper according to the invention,

8 is a schematic side sectional view of the bearing housing of the damper,

Figure 9 is a schematic side view of a

third embodiment of a damper according to the invention,

10 shows a schematic side view of the steamer with the ram extended, FIG.

Figure 11 is a schematic view of the damper from above. Figure 12 is a schematic side sectional view of a bearing housing of the steamer in a sectional plane which extends through the axis AA in Fig. 11 perpendicular to the paper plane.

FIG. 13 shows a schematic lateral sectional view of the damper in a sectional plane which runs through the axis B-B in FIG. 11 perpendicular to the plane of the paper,

Figure 14 is a schematic perspective

Exploded view of the damper,

Figure 15 is a schematic side view of a

Gear element and a rotary member,

16 shows a schematic view of a cross section of the gear element in a sectional plane perpendicular to the plane of the paper on the axis A-A of FIG. 18, FIG.

Figure 17 is a schematic perspective

Exploded view of the gear element with freewheel and rotating element.

FIG. 1 shows a first exemplary embodiment of a

Shock absorber 1 according to the invention, comprising a housing 2 and a plunger 3 displaceable therein. On the plunger 3 projects inside the bearing housing 2, a pin 4 laterally and thus perpendicular to the longitudinal axis of the plunger 3, which engages in a helical guide slot 5. The

Guide slot 5 is formed in the form of the slot-shaped opening on a hollow cylindrical housing portion 2a of the bearing housing 2. In particular, the pin 4 protrudes laterally from, for example, opposite sides of the plunger 3, whereby the pin 4 can engage in a second helical guide slot 6 on the housing portion 2a. wherein the guide slot 6 with respect to the Führungsungskulisee 5 parallel uro 180 ° is rotated about the longitudinal axis of the bearing housing.

The bearing housing 2 is substantially cylindrical

formed, wherein on one end face 2b of the plunger is retracted and extended. At an opposite end face 2c, the bearing housing is closed with a bearing element 7.

The figure 3 can be seen that the damper 1 a

Rotary element 8 includes, which is rotatable about the rotation axis S and concentric with this stored in the bearing housing 2. A maximum outer diameter of the rotary member 8 is preferably at an inner diameter of the housing portion 2a of

Bearing housing 2 adapted so that the rotary member 8 with relatively little play and movement

relatively low friction within the Lagexgehäuses 2 can rotate. The rotary member 8 may, for example, over an entire length of the longitudinal axis of the bearing housing 2 of the

End face 2b to be extended to the front side 2c.

The rotary element 8 has a hollow cylindrical

Sleeve section 8a, in which the plunger 3 is parallel to the rotation and symmetry axis S displaced.

The sleeve section 8a is adjoined on the rotary element 8 along the axis S by a plunging section 8b, which may, for example, have a reduced diameter compared to the outside diameter of the sleeve section 8a. The immersion section 8b has a cross-section perpendicular to the axis S

uniform, symmetrical hexagon, which is arranged concentrically to the central axis of symmetry S of the rotary member 8. Also concentric with the central axis 5 of

Rotary element 8 leads from one end of the rotary member 8 has a bore 8c in the rotary member 8 in. The bore 8c is intended to ensure that a bearing pin 7a of the bearing element 7 projecting into the bearing housing 2 into the rotary element,

in particular may protrude into the dipping section 8b.

At the sleeve portion 8a of the rotary member 8 is a rectilinear Guide slot 9 in the form of a slot-shaped

Breakthrough trained. The inner diameter of the

Sleeve portion 8a and the outer diameter of the plunger 3 are matched to one another such that the plunger 3 with relatively little play in the sleeve member 8a in the direction of the axis of symmetry and concentric with the central axis of rotation of the rotary member 8 is moved in and out. At an end portion 3b of the plunger 3 is perpendicular to

Longitudinal axis S of the plunger 3 is a bore 3a formed on the plunger 3, through which the pin 4 stuck through and can be fixed preferably on the plunger 3. The pen protrudes

4 on the plunger 3 preferably on opposite sides of the plunger 3 laterally. In an assembled state of the damper, the pin passes through the rectilinear

Guide slot 9 of the rotary member 8 and into the helical slide 5 of the sleeve portion 8a of the

Turning element 8 into it. Preferably, a second rectilinear guide slot (not shown) is formed on the sleeve portion 8a of the rotary member 8, whereby the pin 4 is also formed on an opposite side of the rotary member by the linear guide slot (not shown) in the helical

Guide slot of the housing portion 2a may extend.

The end portion 3b with the pin 4, the sleeve portion 8a of the rotary member 8 with the particular two thereto

trained straightforward leadership as well as the

Housing section 2a with the helical guide slots

5 and 6 are gear means with which an axial

Displacement of the plunger 3 along the axis S in a

Rotary movement of the rotary member 8 within the bearing housing 2 about the axis S is convertible or translatable. In a displacement of the plunger 3, for example, in the rotary member 8 in the helical guide slots allow 5 and 6 axial movement of the pin only with simultaneous rotation of the pin 4 about the axis S, due to the

concentric arrangement of plunger 3, rotary member 8 and

Bearing housing 2 at the same time a screw axis of

Guide slots 5 and 6 forms. When rotating the axis S, the pin 4 abuts boundaries of the axially extending. Slit-shaped guide slots 9 and thereby leads the coupled with the sleeve portion 8a rotary member 8, in particular the immersion portion 8b with a rotation about the axis S with.

With reference to Figures 4, 5 and 6, the internal structure of

1 damper in a composite functional

Condition recognizable. Between the sleeve portion 2a of the

Lagergehauses and the end face 2c extends a hollow Gehauseabschnitt 2d of the bearing housing. In this case, on an inner side of the section 2d symmetrically about the central axis S of the bearing housing 2 seven equal-sized rectangular surfaces 2e are arranged, which delimit a chamber 10 with a regular, heptagonal cross-section in the radial direction perpendicular to the axis S. A minimum distance B each of the

Inner surfaces 2e of the sleeve member is larger than a

maximum distance A from corner edges 8d immersion section Bb from the central axis S. The inner wall surfaces 2e enclose a chamber 10 into which the immersion section 8b with a cross section of a uniform hexagon extends symmetrically with respect to the central axis of rotation S.

Preferably, the chamber 10 is at least partially filled with a damping fluid 12, which is located in the space between the side surfaces 2e and the immersion portion Bb. Neil the two evenly polygonal cross sections of

Inner surfaces 2e and the dipping section Bb differ by one corner, at each rotational angle position of the dipping section Bb against the inner surfaces 2e at least one corner is comparatively close to one of the inner surfaces 2e, whereby at the corresponding corner a reduced

Flow cross section occurs when the immersion element 8b rotates relative to the housing portion 2d. As a result, comparatively high shear stresses can be produced in the damping fluid 12, with which strong damping forces can be generated. If the damping fluid is a non-Newtonian, in particular a dilatant, liquid or dispersion, the chamber 10 can achieve a desired damping effect with a comparatively small volume. FIGS. 7 and 8 show a second exemplary embodiment of a damper 1 according to the invention. As in the previous example, a plunger 3 is mounted in a linearly displaceable manner in a bearing housing 2. The damper has a spring 11, which on the plunger 3 a compressive force in the direction of

extended home position shown in Figures 7 and 8. The damper 1 is in essence

Characteristics match the above-described embodiment, which is why only one essential

Difference is described.

A linear guide slot 9 in the form of a

slit-shaped opening is formed on the damper 1 on the bearing housing 2. Furthermore, they are helical

Guide slots 5 and 6 in the form of slit-shaped

Openings formed on a sleeve portion 8a of a rotary member B. Because the plunger 3 is guided by the guide slot 9 on the bearing housing 2 on a straight path, the damper 1, only the rotary member 8 as a rotating element. As a result, a rotating co-movement of the plunger 3 can be advantageously avoided.

FIGS. 9 to 17 show a third exemplary embodiment of a damper 1 according to the invention. The damper 1 has a bearing housing 2, on the plate-shaped

Attachment sections 2f on opposite sides of the

Bearing housing 2 protrude. At each of the attachment portions 2f a hole 2g is provided, whereby the damper attach to a furniture part, in particular screws.

The damper 1 shown in Figures 9 to 17 has

numerous matching features with the previously

described second embodiment, which is why below will be discussed only on different features.

The damper 1 comprises a rotary element 8 with a

Immersion section 8b, which may be immersed in a chamber 10 of the bearing housing 2 in a damping fluid 12. The

Rotary element 8 is provided with a cylindrical pin portion 8e coupled to an overrunning clutch 13, wherein the pin portion extends concentrically into the one-way clutch.

LIST OF REFERENCE NUMBERS

1 damper

2 bearing housings

2a housing section

2b front side

2c front side

2d housing section

2e palm

2f attachment sections

2g bore

3 pestles

3a hole

3b end section

4 pen

5 guide slot (helical)

6 guide slot (helical)

7 bearing element (circular cover) 7a bearing pin

8 rotary element

8a sleeve section

8b diving section

8c bearing bore

8d corner edge

8e pin section

9 guide slot (straight line)

10 chamber

11 spring

12 damping fluid

13 overrunning clutch

14 gear element

Claims

Claims:

1. Device (1) for damping movement in particular a movable furniture part with a bearing housing (2), characterized in that on the bearing housing (2) a

Movement sensor (3) is movably mounted and in which a rotary member (8) is rotatably mounted, and with gear means (4, 5, 6, 8a, 9, 14), with which a movement of

Movement transducer (3) in a rotational movement of the rotary member (8) is transferable, wherein the bearing housing (2) has a chamber (10) into which extends at least one immersion portion (8b) of the rotary member (8), wherein in the chamber (10) a damping fluid (12) is present.

2. Device (1) according to claim 1, characterized in that the damping fluid (12) in the chamber (10) has a

Gap between an outer surface of the immersion portion (8b) and an inner surface (2e) of the chamber (10) fills.

3. Device (1) according to any one of the preceding claims, characterized in that a cross section of an interior of the chamber (10) on an inner surface (2 e) has an irregular curvature about a geometric center.

4. Device (1) according to one of the preceding claims, characterized in that a cross section of the immersion element (8b), which is located perpendicular to a rotational axis, has an irregular curvature about the axis of rotation.

5. Device (1) according to one of the preceding claims, characterized in that the rotary element (8) and

in particular the immersion section (8b), in particular its axis of rotation is arranged eccentrically to an axis of symmetry of the interior of the chamber (10), wherein the axis of symmetry is located in particular parallel to the axis of rotation of the rotary member.

6. Device (1) according to any one of the preceding claims, characterized in that the transmission means (4, 5, 6, Ba, 9, 14) a. to the bearing housing (2) rotatably mounted

Gear element (8a, 14) comprise, rotatably with the

Rotary element (8) is coupled.

7. Device (1) according to any one of the preceding claims, characterized in that the transmission means (4, 5, 6, 8a, 9, 14) to the bearing housing (2) rotatably mounted

Gear element (Ba, 14) comprise, over a

One-way clutch (13) is coupled to the rotary member (B) such that in a given direction of rotation a higher

Torque as in an opposite direction of rotation of the transmission element (8a, 14) on the rotary member (8) is transferable.

8. Device (1) according to any one of the preceding claims, characterized in that the transmission element (8a, 14) has a hollow cylindrical portion which is arranged parallel to the axis of rotation.

9. Device (1) according to any one of the preceding claims, characterized in that the Bewegungsaufnehmer (3) is a plunger, on a front side (2b) of the Lagergehauses (2) on a predetermined path of movement on the bearing housing (2) alternately out and is movable into it.

10. Device (1) according to one of the preceding claims, characterized in that the bearing housing (2) a

Guide section is formed, at which the

Movement sensor (3) is movable in opposite directions along a predetermined path of movement, wherein a rotational movement of the Bewegungsaufnehmers (3) around the movement path, in particular with respect to the bearing housing (2) is blocked.

11. Device (1) according to one of the preceding claims, characterized in that the transmission means (4, 5, 6, 8a, 9, 14) comprise a helical guide slot (5, 6).

12. Device (1) according to any one of the preceding claims, characterized in that the transmission means (4, 5, 6, 8a, 9, 14) comprise a second guide slot (9) having a along the axis of rotation parallel guide profile.

13. Device (1) according to one of the preceding claims, characterized in that the transmission means (4, 5, 6, 8a, 9, 14) comprise a driver element (4) which in the

helical guide slot (5, 6) can engage.

14. Device (1) according to any one of the preceding claims, characterized in that the driver element (4) is a pin which is mounted on the motion sensor (3), in particular on the plunger at a fixed position.

15. Device (1) according to one of the preceding claims, characterized in that the helical

Guide slot {5, 6) on the transmission element (8a, 14) is formed.

16. Device (1) according to any one of the preceding claims, characterized in that the second guide slot (9) with the parallel to the axis of rotation extending guide profile on the transmission element (8a, 14) is formed.

17. Device (1) according to any one of the preceding claims, characterized in that the first guide slot (5, 6) or the second guide slot (9) is fixedly connected to the bearing housing (2).

18. Device (1) according to any one of the preceding claims, characterized in that the Dampfungsfluid (12) is a dilatant fluid.

19. Furniture with a device (1) according to one of

aforementioned claims.