EP2863774B1 - Pull-out guide device for furniture parts that are movable relative to one another comprising a roller bearing device - Google Patents

Description

The invention relates to a pull-out guide device for drawers, with a Wälzkörperlagereinrichtung with a plurality of rolling elements, which are rotatably mounted in at least one Wälzkörperkäfig each in at least one or more the respective rolling elements associated bearing area (s).

Guide devices with Wälzkörperlagereinrichtungen are known from the prior art for a long time, so from the DE 35 36 654 C2 and the WO 2007/065180 A1 ,

After DE 35 36 654 C2 have the bearing areas bearing receptacles, which engage in a wave-like bearing journal of the rolling elements. For insertion into the bearing mounts an insertion gap is widened briefly, which contracts elastically after insertion of the journal again. In the circular bearing mount the trunnions are then held freely rotatable with a clearance fit.

From the WO 2009/027342 A1 It is also known to press the rolling elements with elastic spring elements against an abutment. This is especially the high design effort to complain about.

There is still a need for optimization with regard to a quieter running of the roller bearing device or the guide device provided therewith. In addition, the design effort for the production should not be increased, if possible, or only insignificantly, despite the quiet running.

The invention addresses this problem and solves it by means of the subject matter of claims 1 and 14.

Advantageous embodiments of the invention can be found in the dependent claims.

According to claim 1, a pull-out guide device for relatively movable furniture parts (preferably a furniture body and a relative thereto movable drawer) is provided with a Wälzkörperlagereinrichtung with rolling elements, which are rotatably mounted in at least one Wälzkörperkäfig, wherein at least one of the rolling elements is held by means of an interference fit in at least one bearing area in Wälzkörperkäfig and rotatably supported.

The interference fit leads to a slightly less smooth running of this rolling element in the rolling element cage, which does not significantly affect the bearing properties, whereas the measure results in reduced noise. In this case, one, two or more of the rolling elements by means of an interference fit in the bearing areas are rotatably mounted and the rest of the rolling elements by means of a transition fit, which can be designed as Übermaßpassung, zero fit or clearance, but which is designed such that no flow due to plastic deformation caused in the assembly of the rolling element / has been rotatably mounted in the rolling element cage in the associated storage areas. The design effort for production is possibly not known or only slightly increased.

The rolling element (s) held with interference fit on / in the bearing areas significantly reduce the noise, whereas preferably the plurality (preferably more than 50, in particular 70%) of the rolling elements with the transition fit are particularly easily rotatable.

There is also provided a method of assembling a rolling element bearing device for a drawer slide extractor, characterized by the following step: inserting the rolling elements into the rolling element cage, mounting a first part of the transition fit rolling elements and a second part of the rolling elements with interference fit is mounted. Preferably, this method is supplemented by the following further step: limited plastic deformation of the storage area as a result of a flow process. Then, the rolling element bearing device is preferably mounted on one or more rails. It can also be integrated directly into it.

The rolling elements preferably have (first) bearing means, which cooperate rotatably with corresponding (second) bearing means - hereinafter also referred to bearing points - the Wälzkörperkäfigs, the "bearing means" and the "bearings" in the language of this application form the "storage areas".

In this context, it is particularly advantageous if the at least one actual storage area, i. the first bearing means of the rolling element or the bearing points of the Wälzkörperkäfigs are plastically deformable, in the region of the interference fit or the bearing means and / or bearings of the rolling elements and / or the bearing cage after the first insertion limited plastically deformed so that the rotation of the rolling element due the flow is improved from the state immediately after the assembly of the rolling element mounted with interference fit.

For this purpose, it is again advantageous if at least the rolling body rotatably mounted with the interference fit and / or the bearing areas consists of a plastically deformable plastic material (for example polyamide) which brings about the described flowability after oversized assembly.

Despite the flow, the rolling element still remains largely free of play, but due to the lower holding force acting on the rolling element, the torque required for rotating the rolling element is reduced. Overall, this results in an excellent noise reduction with good running properties.

The rolling elements may preferably consist of non-metals such as polyamide, POM, PE, PP, ceramics, thermosets or metals such as brass, bronze, aluminum, steel or a rolling element made of several materials. Also conceivable are rolling elements which have a core and jacket, or arrangements in which the actual rolling element consists of a material with good bearing properties and the bearing areas of the rolling element of a flowable plastic.

The main effect of "flow" or "flow" begins at the onset and takes a few hours. The flow itself is usually completed after a few days to a considerable extent, but may take longer.

The Wälzkörperkäfige preferably consist of a dimensionally stable material, which may be, for example, as in the rolling elements to metals or non-metals. Also, a rolling element cage made of a multi-component material is conceivable, wherein the base body of a particularly dimensionally stable material and the bearing areas may consist of a plastically deformable plastic.

The interpretation of the material pairing between the bearing of the Wälzkörperkäfigs and the rolling element is incumbent on the skilled person, which can take place due to the construction of the pullout guide device the actual flow process at the bearing of the Wälzkörperkäfigs and / or at the bearing point of the rolling element.

It is also advantageous if at least one of the two materials of the bearing points has tribologically optimized properties, so that the torque required for rotating the rolling element is reduced as much as possible. This is achieved for example by lubricants that are already in at least one material of the bearings.

In the context of the invention, many different advantageous variants can be realized. Thus, it is advantageously possible for the at least one rolling element rotatably mounted by means of the interference fit to differ from the at least one rolling element mounted with transition fitting by at least one or more of the following main parameters: shape, modulus, color, construction.

In addition, it is also advantageously possible for the rolling bodies rotatably mounted with transition fit and interference fit to differ with regard to one or more of the following subparameters of the main parameter "shape": diameter, width, running surface, bearing means. It is also conceivable that the rolling bodies rotatably mounted with transition fit and interference fit differ by one or more of the following subparameters of the main parameter "structure": solid body, hollow body, material, composite material.

Optionally / alternatively, it is also expedient if the at least one interference fit of the bearing point of the rolling element cage differs from the at least one bearing point provided with transitional fit of the rolling element cage by at least one or more of the following main parameters: shape, dimensions, structure.

It is also advantageous if the at least one oversized rolling element is shaped so that the at least one bearing means is located within the projected cross-sectional area of its largest tread diameter.

Advantageous embodiments can be found in the dependent claims.

Fig. 1

eine Seitenansicht eines ersten Ausführungsbeispiels eines Wälzkörperkäfigs mit Wälzkörpern;

Fig. 2

eine Seitenansicht der Wälzkörperkäfigs aus Fig. 1;

Fig. 3

eine Seitenansicht eines zweiten Ausführungsbeispiels eines Wälzkörperkäfigs mit Wälzkörpern;

Fig. 4a

eine Draufsicht auf einen Wälzkörper;

Fig. 4b

eine Draufsicht auf einen Wälzkörperkäfig;

Fig. 4c

eine Draufsicht auf einen Wälzkörper, der mit Übergangspassung in Lageraufnahmen eines Wälzkörperkäfigs nach Art der Fig. 4b eingesetzt ist;

Fig. 4d

eine Draufsicht auf einen Wälzkörper nach Art der Fig. 4a , der mit Übermaßpassung in Lageraufnahmen eines Wälzkörperkäfigs nach Art der Fig. 4b eingesetzt ist;

Fig. 5a

eine Draufsicht auf einen weiteren Wälzkörper;

Fig. 5b

eine Draufsicht auf einen weiteren Wälzkörperkäfig;

Fig. 5c

eine Draufsicht auf einen Wälzkörper, der mit Übergangspassung in eine Lageraufnahme eines Wälzkörperkäfigs nach Art der Fig. 5b eingesetzt ist;

Fig. 5d

eine Draufsicht auf einen Wälzkörper nach Art der Fig. 5a, der mit Übermaßpassung in Lageraufnahmen eines Wälzkörperkäfigs nach Art der Fig. 5b eingesetzt ist; und

Fig. 6

eine Sprengansicht einer Auszugs-Führungsvorrichtung für Schubkästen.

The invention will be described in more detail below with reference to the drawing with reference to exemplary embodiments. It shows:

Fig. 1

a side view of a first embodiment of a rolling element cage with rolling elements;

Fig. 2

a side view of the Wälzkörperkäfigs Fig. 1 ;

Fig. 3

a side view of a second embodiment of a Wälzkörperkäfigs with rolling elements;

Fig. 4a

a plan view of a rolling body;

Fig. 4b

a plan view of a rolling element cage;

Fig. 4c

a plan view of a rolling element with the transition fit in bearing receptacles of a Wälzkörperkäfigs on the type of Fig. 4b is used;

Fig. 4d

a plan view of a rolling element of the type Fig. 4a , with oversize in bearing receptacles of a rolling element cage on the type of Fig. 4b is used;

Fig. 5a

a plan view of another rolling element;

Fig. 5b

a plan view of another Wälzkörperkäfig;

Fig. 5c

a plan view of a rolling element with the transition fit into a bearing receptacle of a rolling element cage according to the type Fig. 5b is used;

Fig. 5d

a plan view of a rolling element of the type Fig. 5a , with oversize in bearing receptacles of a rolling element cage on the type of Fig. 5b is used; and

Fig. 6

an explosive view of an extension guide device for drawers.

Fig. 1 shows a rolling bearing device 1 for guide devices, in particular extract guide devices 100 (see Fig. 6 ).

The pullout guide device 100 - Fig. 6 - Has one or more relative to each other preferably linearly displaceable rails 101, 102, 103 and one or more of the rolling bearing devices 1. The rails 101, 102, 103 preferably form a carcass rail (for attachment to a furniture carcass), possibly a middle rail and a running rail (for attachment to the drawer). In this way, a full or partial statement guide is formed. In the Fig. 6 shown extract guide device is to be understood only as a preferred embodiment. The invention also permits the realization of other drawer slide devices in which the rails or rolling bearing devices are designed differently than in FIG Fig. 6 shown.

The rolling bearing device 1 ( Fig. 6 or in an alternative embodiment: Fig. 1 to 5 ) has at least one Wälzkörperkäfig 2 and a plurality of rolling elements 3, 3a, 3b, 3c, d, ... and 4, 4a, 4b, ... each in one or here two storage areas 5a, b ( Fig. 2 ) are rotatably mounted in the Wälzkörperkäfig 2. The Wälzkörperkäfig can be advantageously designed as a cross-sectionally U-shaped rail, as in Fig. 1 is shown. The Wälzkörperkäfig but also have a nearly different shape, it may be designed trapezoidal or other suitable manner. In addition, it can be arranged on one or preferably two or more sides rolling elements on him.

The rolling elements 3 and 4 may be formed in various ways.

Particularly preferred are - as in Fig. 4 and 5 shown - formed as a cylindrical roller body, each having a cylindrical body 6 and on both sides of this body 6 at its axial sides each have a protruding bearing pin 7, 8 and 9, 10, said bearing pins serve as shaft sections, which - in a simple manner - rotatable in bearing receptacles 11, 12 of the Wälzkörperkäfigs 2 engage. Fig. 4 and 5 is advantageous, but at the same time also exemplary, the execution depends on the application. The expert can choose from a variety of combinations of rolling elements, as for example in the EP1407691 A1 is described, with other arrangements and designs of rolling elements are possible, such as in the WO2011146951 A1 described. However exist here the bearings for the Wälzköper in the Wälzkörperkäfig only from play fits, as in the WO2011146951 A1 on page 8 (4).

The bearing pins 7, 8 and 9, 10 and the bearing mounts 11, 12 form in their interaction here - in an advantageous but not mandatory way - the bearing portions 5a, b from.

Alternative embodiments of the illustrated variants are conceivable. Thus, the storage areas could be designed differently, they could for example be formed equivalent to the representation of the figures by bearing pins on the inner sides of the Wälzkörperkäfigs 2, which engage respectively in opposite directions in an axial bore of the rolling elements (not shown). Also, the rolling elements 3, 4 need not be cylindrical. In particular, rolling elements 3, 4 in spherical or barrel shape or as an ellipsoid, in particular with bearing pins or holes, can be realized.

As in Fig. 2 can be seen in the illustrated embodiment, all of the bearing receivers 11, 12 of the Wälzkörperkäfigs still identical before mounting. They each have a lateral slot 13 for insertion of the bearing pins 7, 8 and 9, 10 in the actual bearing mounts 11, 12.

As can be seen, in this case, the majority of the rolling elements 3 have such circular cross-section bearing pins 7, 8, which have a smaller diameter than the circular bearing mounts, so that they are rotatably mounted with a transition fit in the bearing mounts.

To Fig. 1 such as Fig. 4c and d However, one of the rolling elements 4 on bearing journals 9, 10, which have a total diameter or partially a larger diameter than the associated bearing seat 12, so that these bearing pins 9, 10 held with an oversize or press fit in this or both sides in these bearing receivers 12 and are also rotatably mounted. On a mounted state - by type or analogous to Fig. 1 , in particular involving a flow process, which has plastically deformed the bearing areas 5a, 5b of this rolling element 4a after the first insertion and after the lapse of a time of, in particular, at least a few days - the subject of the device claim 1 relates.

The interference fit is dimensioned in such a way and may therefore only be dimensioned in such a way that nevertheless a certain rotatability of the rolling body 4 in the bearing area 5a, b is maintained after termination of the flow process following the plastic deformation.

It is therefore additionally preferably and advantageously used the effect that the at least one storage area 5a, b changed after the onset of the rolling body 4a, b in the bearing seat 12 due to the excess flow.

This is particularly possible if the storage areas - here so the at least one bearing pin 9, 10 or the bearing pin 9, 10 and / or the bearing receptacle (s) 12 made of a plastically deformable plastic (possibly with low elastic components), the over a certain period of time eg a few days after the insertion of the journals in the receptacle (or analogously in another embodiment of the or the storage areas (s)) limited flow deformed and wherein the low elastic portion exerts the lowest possible pressure on the storage area.

In the experiment it has been found that the noise of a Wälzkörperlagerung or a guide provided therewith, in particular a linear pull-out guide for drawers, reduced when one or more of the rolling elements 4 is mounted with such a press fit in the Wälzkörperkäfig 2 / are.

It is also possible to rotatably support a plurality of rolling bodies 4a, b with an oversize in the bearing areas 5a, b ( Fig. 3 ), the expert determined in each case in a simple test experiment easily the appropriate design so that the running of the guide device is not or at least not too much affected and yet a significant noise reduction is achieved.

To Fig. 3 are the excessively rotatably supported rolling elements 4a, b arranged in a row of a plurality of rolling elements at the opposite ends of the row, resulting in a particularly quiet running. Alternative series - eg alternating with play and interference fit - are also conceivable.

Between the rolling bodies 4a, b, which are held rotatably with excess, at least one or more preferably a plurality of rolling elements 3a, b, c, ... are preferably provided, which are held with transition fit in the Wälzkörperkäfig 2, which optimizes the run.

Two different versions show the Fig. 4 and 5 , To Fig. 4 engage the bearing pins 7, 8 and 9, 10 axially through the bearing receivers 11 and 12 in the spaced sides 14, 15 of the bearing cage 2 and stand out of these sides facing away from each other freely outwards. This embodiment corresponds to the embodiment described above, in which the diameter of the journal bearing 12 held with interference fit in the bearing receptacles 12 is greater than that of the bearing receivers 12 and the diameter of the transition pin bearing 7, 8 of the rolling elements 3 is smaller than the diameter the associated bearing mounts 11. The illustrated variant is inexpensive and easy to install. In particular, the measure of the bearing with a press fit does not make the rolling element bearing device expensive or not appreciable.

To Fig. 5 the bearing receptacles are formed as bores or pockets in the side walls 14, 15 of the roller body cage (not shown in detail here), wherein between the bearing journal 7, 8 held with transitional fit Fig. 5c ) and the holes or pockets of the Wälzkörperkäfigs 2 is given a transition fit, whereas the one or more held with interference fit rolling elements 4 with excess in the holes or pockets in the inner sides of the side walls 14, 15 engage. This variant is also simple and safe and very quiet in the barrel. The rolling elements can einliegen here in chambers 16 of the rolling element cage, which are separated by intermediate walls 17 perpendicular to the side walls 14, 15 from each other.

reference numeral

roller bearing device

1

Rolling Element

2

rolling elements

3, 3a, 3b, 3c, 3d, ...; 4, 4a, 4b, ...

storage areas

5a, b

body

6

spigot

7, 8 or 9, 10

bearing mounts

11, 12

slot

13

side walls

14, 15

chambers

16

partitions

17

Abstract guiding device

100

rails

101, 102, 103

Claims (15)

1. A pullout guide device for furniture parts movable relative to one another, having a roller bearing device, which comprises the following:

   a. rolling elements (3a, b, c, d,... 4a, b), which are mounted so they are rotatable in at least one roller bearing cage (2),

   b. wherein at least one of the rolling elements (4a, b) is held and mounted so it is rotatable by means of an interference fit in at least one bearing region (5a, b) in the roller bearing cage (2),

   c. wherein the bearing region(s) (5a, b) is/are plastically deformed after the first insertion in the region of the interference fit.
2. The pullout guide device according to Claim 1, characterized in that one single or a plurality of the rolling elements (4a, b) of the roller bearing device is/are mounted so they are rotatable by means of an interference fit in the roller bearing cage (2), and the remaining ones of the rolling elements (3a, b, c,...) are mounted so they are rotatable by means of a transition fit in the roller bearing cage (2).
3. The pullout guide device according to one of the preceding claims, characterized in that one or two bearing regions (5a, 5b) are plastically deformed in a flowing manner to a limited extent in the region of the interference fit.
4. The pullout guide according to one of the preceding claims, characterized in that the rolling elements (3, 4) preferably each have first bearing means (7, 8, 9, 10) which interact with corresponding second bearing means (11, 12) - also referred to as bearing points hereafter - of the roller bearing cage (2) in a rotatable manner, wherein the first bearing means and the bearing points each implement the bearing regions (5a, b) in their interaction.
5. The pullout guide device according to one of the preceding claims, characterized in that the rolling elements (4a, b) mounted so they are rotatable with the interference fit consist of a plastically deformable plastic, and/or the roller bearing cage (2) consists of a plastically deformable plastic at least in the region of the at least one bearing point for mounting the rolling element (4) mounted so it is rotatable with interference fit.
6. The pullout guide device according to one of the preceding claims, characterized in that the plastic of the at least one rolling element (4) mounted with interference fit has the capability in relation to the plastic of the bearing point of the associated roller bearing cage (2) to flow in a plastically deforming manner to a limited extent.
7. The pullout guide device according to one of the preceding claims, characterized in that the at least one rolling element (4), which is mounted so it is rotatable by means of the interference fit, differs from the at least one rolling element (3) mounted using transition fit by way of at least one or more of the following main parameters: shape, modulus of elasticity, color, structure.
8. The pullout guide device according to one of the preceding claims, characterized in that the rolling elements (3, 4), which are mounted so they are rotatable with transition fit and interference fit, differ with regard to one or more of the following subparameters of the main parameter "shape": diameter, width, running surface, bearing means.
9. The pullout guide device according to one of the preceding claims, characterized in that the rolling elements which are mounted so they are rotatable with transition fit and interference fit differ by way of one or more of the following subparameters of the main parameter "structure": solid body, hollow body, material, material composite.
10. The pullout guide device according to one of the preceding claims, characterized in that the at least one interference fit of the bearing point of the roller bearing cage (2) differs from the at least one bearing points of the roller bearing cage provided with transition fit by way of at least one or more of the following main parameters: shape, dimensions, structure.
11. The pullout guide device according to one of the preceding claims, characterized in that the at least one rolling element (4) which is held with interference fit is shaped so that the at least one bearing means (9, 10) is located within the projected cross-sectional area of its largest running surface diameter.
12. The pullout guide device according to one of the preceding claims, characterized in that the bearing points are implemented as bearing receptacles (11, 12) of the roller bearing cage (2), and the bearing means of the rolling elements (3) are implemented as bearing pins (7, 8; 9, 10), and the bearing pins (9, 10) of the at least one rolling element (4) which is held with interference fit engage in the bearing receptacles (12) with a or the interference fit, and the bearing pins (7, 8) of the remaining rolling elements (3) engage in the associated bearing receptacles (11) with transition fit.
13. The pullout guide device according to one of the preceding claims, characterized in that at least one of the bearing regions (5a, b) is plastically deformed as a result of a flowing procedure in the region of at least one contact point between the rolling element (4) and the bearing receptacle (12).
14. A method for installing a roller bearing device for a pullout guide device for drawers, characterized by the following step:

    inserting the rolling elements into the roller bearing cage (2), wherein a first part of the rolling elements are installed with transition fit and a second part of the rolling elements are installed with press fit.
15. The method according to Claim 14, characterized by the following further step: causing limited plastic deformation of the bearing region as a result of a flowing procedure.

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