DE202014009194U1 - Pull-out system and household cooker - Google Patents

Abstract

Extractor system (10) for a Haushaltsgargerät (1), with a first track (11), a second track (12) and between the first track (11) and the second track (12) arranged bearing means (13) which a rolling bearing cage (14) and a plurality in the rolling bearing cage (14) received rolling bearing body (15, 17), wherein the first track (11) and the second track (12) by means of the bearing means (13) between a retracted state and an extended state of the extension system (10) are displaceable relative to each other, wherein during relative displacement of the rails (11, 12), the rolling bearing bodies (15, 17) roll along rolling bearing body raceways (18, 19, 22, 23) on the rails (11, 12), wherein the rolling bearing cage (14) is positioned by means of first cage positioning elements (24, 27) relative to the second running track (12), and wherein the first cage positioning elements (24, 27) are located outside of Rolling body raceways (18, 19, 22, 23) are arranged and have a lubricant.

Description

The present invention relates to a pull-out system for a Haushaltsgargerät and a Haushaltsgargerät.

For Haushaltsgargeräte, such as ovens, there are so-called pull-out systems, which allow the user to pull out accessories such as baking sheets significantly further out of the oven than would be possible with normal Einhängegittern.

The DE 10 2011 052 824 A1 describes such an extension system with a fixed and a movable rail, which are mounted relative to each other via rolling bearing, which are received by a rolling bearing cage, relative to each other.

Against this background, an object of the present invention is to provide an improved extraction system.

Accordingly, a pull-out system for a Haushaltsgargerät is proposed with a first track, a second track and a arranged between the first track and the second track bearing device. The bearing device comprises a rolling bearing cage and a plurality of rolling bearing housings accommodated in the rolling bearing cage, wherein the first running rail and the second running rail are displaceable relative to one another by means of the bearing device between a retracted state and an extended state of the extension system, wherein the relative displacement of the rails Rolling rolling bearing body along rolling bearing body raceways on the rails, wherein the rolling bearing cage is positioned by means of first Käfigpositionierelementen relative to the second track rail and wherein the first Käfigpositionierelemente are arranged outside of the rolling bearing body raceways and having a lubricant.

Characterized in that the arranged outside the rolling bearing body raceways first or side Käfigpositionierelemente have a lubricant, prevents the first Käfigpositionierelemente wear. This prevents that a lateral clearance between the second rails and the rolling bearing cage over the life of the extension system increases such that the extraction system blocks. The service life of the extension system can be significantly increased with the help of the lubricant. It is achieved a better running behavior and a lower noise during operation of the extension system. The pull-out system can also be referred to as a telescopic extension system. The rails can also be referred to as guide rails. The first track is preferably fastened in or on a cooking chamber of the Haushaltsgargeräts. In particular, the first running rail can be suspended in or on a side wall of the cooking chamber. Preferably, at least two such pull-out systems are arranged at the same height on mutually opposite side walls of the cooking chamber in the cooking chamber. The pull-out systems can be removed from the cooking compartment. As a result, an easy cleaning of the extraction systems, for example in a dishwasher, possible. The first track can also be referred to as a fixed track, the second track can also be referred to as a movable track. In the retracted state, the first and the second track rail are arranged in the cooking chamber. In the extended state, the second running rail is moved out of the cooking chamber at least in sections.

According to one embodiment, second cage positioning elements are adapted to position the rolling bearing cage relative to the first track rail and the second track rail.

The second or upper Käfigpositionierelemente are preferably adapted to position the roller bearing cage simultaneously relative to the first track rail and the second track rail. With the help of the first and the second Käfigpositionierelemente tilting of the rolling bearing cage is prevented relative to the rails and a consequent blocking of the extension system.

According to a further embodiment, the first Käfigpositionierelemente for positioning the roller bearing cage relative to the second track rail are adapted to abut on side walls of the second track rail.

In cross-section, the second running rail preferably has a U-shaped or C-shaped geometry which at least partially surrounds the first running rail. The roller bearing cage preferably also has a U-shaped or C-shaped geometry and partially surrounds the first track rail.

According to a further embodiment, the first cage positioning elements are arranged next to the roller bearing body raceways. Preferably, the first Käfigpositionierelemente are so far away from the rolling bearing body raceways that no lubricant passes from the rolling bearing body raceways on the Käfigpositionierelemente.

According to a further embodiment, the first Käfigpositionierelemente are materialeinstückig formed with the rolling bearing cage.

Preferably, the rolling bearing cage is a metal component. For example, the rolling bearing cage may be a bending / stamping component. The first and / or second cage positioning elements are preferably embossed in the roller bearing cage.

According to a further embodiment, each first cage positioning element has a receiving area for receiving the lubricant.

The lubricant is preferably grease-based. The receiving area may have roughnesses, dents, slits or grooves. In particular, such a receiving region is arranged on each first and / or second cage positioning element. Preferably, each receiving area has a plurality of grooves or slots which extend in a longitudinal direction rolling bearing cage. In particular, the slots or grooves extend in an extension direction of the extension system.

According to a further embodiment, the first Käfigpositionierelemente and the rolling bearing cage are formed in several parts.

Each first and / or second cage positioning element is preferably a separate component.

According to a further embodiment, the first Käfigpositionierelemente are bolted to the rolling bearing cage, riveted or pressed into this.

Alternatively, the first and / or second Käfigpositionierelemente be snapped into the rolling bearing cage or otherwise firmly connected thereto.

According to a further embodiment, the first cage positioning elements are made of a self-lubricating material.

As a result, relubrication of the first and / or second cage positioning elements can be dispensed with. The lubricating properties of the cage positioning elements are preferably maintained throughout the life of the extension system. For example, the Käfigpositionierelemente can be made of a graphite material or a sintered metal. For example, the Käfigpositionierelemente are formed as pressed into the rolling bearing cage graphite blocks.

Furthermore, a Haushaltsgargerät is proposed with such an extension system.

The Haushaltsgargerät may for example be an oven, a microwave oven, a microwave oven or the like.

Further possible implementations of the pull-out system and / or the household cooking appliance also include not explicitly mentioned combinations of features or embodiments described above or below with respect to the exemplary embodiments. The expert will also add individual aspects as improvements or additions to the respective basic form of the extension system and / or the Haushaltsgargeräts.

Further advantageous embodiments and aspects of the drawer system and / or the Haushaltsgargeräts are the subject of the dependent claims and the embodiments described below, the drawer system and / or Haushaltsgargeräts. Furthermore, the pull-out system and / or the household cooking appliance will be explained in more detail on the basis of preferred embodiments with reference to the enclosed figures.

1 shows a schematic perspective view of an embodiment of a Haushaltsgargeräts;

2 shows a schematic perspective view of an embodiment of a pull-out system for the Haushaltsgargerät according to the 1 ;

3 shows a further schematic perspective view of the extension system according to the 2 ;

4 shows a further schematic perspective view of the extension system according to the 2 ; and

5 shows a schematic sectional view of the extension system according to the 2 ,

In the figures, the same or functionally identical elements have been given the same reference numerals, unless stated otherwise.

The 1 shows a schematic perspective view of a Haushaltsgargeräts 1 , The household cooking appliance 1 For example, is an oven, a microwave oven, a microwave oven or the like. The household cooking appliance 1 has a muffle or a cooking chamber 2 up, through a door 3 is closable. The cooking space 2 can inside a housing of the Haushaltsgargeräts 1 be arranged. The door 3 is in the 1 shown in their closed position. By pivoting around one at a lower end of the door 3 provided pivot axis can the door 3 closed or opened. Alternatively, the door 3 on the side of the oven 2 be struck. Furthermore, the door can 3 at one of the oven 2 be arranged pull-out baking cart. At an upper section of the door 3 can a handle 4 be provided.

The cooking space 2 has a floor 5 one to the ground 5 opposite arranged ceiling 6 , one of the door 3 opposite rear wall 7 and two side walls arranged opposite each other 8th . 9 on. The cooking space 2 is preferably cuboid or cube-shaped. The cooking space 2 can be made of a metal material, in particular of a steel sheet. Preferably, the household cooking appliance 1 pyrolysefähig. That means the cooking space 2 of the household cooking appliance 1 can be heated to temperatures above 450 ° C.

The 2 shows a schematic perspective view of an extension system 10 for the household cooking appliance 1 , The 3 shows a further schematic perspective view of the extension system 10 , The following is on the 2 and 3 simultaneously referred to.

The pull-out system 10 is in the oven 2 arranged. Preferably, in the cooking chamber 2 at least two on opposite side walls 8th . 9 intended extension systems 10 intended. In particular, several such pairs of extension systems 10 in the oven 2 be provided. The pairs of abstract systems 10 can be arranged one above the other. In particular, the pull-out systems 10 from the oven 2 removable. This allows the pull-out systems 10 be easily cleaned, for example in a dishwasher. In particular, the pull-out systems 10 in or on the side walls 8th . 9 suspended.

The pull-out system 10 has a first track 11 , a second track 12 in the 3 not shown, and one between the first track 11 and the second track 12 arranged storage facility 13 on. The first track 11 is on one of the side walls 8th . 9 of the cooking chamber 2 fixable. The first track 11 has in cross section, as in the 5 shown in about a T shape. The second track 12 has a U- or C-shaped geometry in cross-section, which is the first track 11 embraces. The storage facility 13 has a rolling bearing cage 14 and a plurality in the rolling bearing cage 14 received rolling bearing body 15 to 17 on. The rolling bearing cage 14 points like the second track 12 , an inverted U-shape or C-shape on and surrounds the first track 11 ,

The rolling bearing body 15 to 17 can be spherical or cylindrical. As the 5 shows, are the rolling bearing body 15 . 17 for example, as balls and the rolling bearing body 16 designed as a cylinder. The number of rolling bearing bodies 15 to 17 is arbitrary. For example, the storage facility 13 , as the 4 shows twelve rolling bearing bodies 15 to 17 exhibit. The rolling bearing body 15 and 17 can be considered lateral rolling bearing body 15 . 17 be designated. The rolling bearing body 16 can as upper rolling bearing body 16 be designated.

The first or fixed track 11 and the second or movable track rail 12 can with the help of the storage facility 13 between one in the 2 shown retracted state and an extended state of the extension system 10 be relocatable relative to each other. When moving from the retracted state to the extended state is the first track 11 fixed and the second track 12 moves relative to the fixed first track 11 , When relative to each other relocating the rails 11 . 12 roll the rolling bearing body 15 to 17 along roller bearing body raceways 18 to 23 on the rails 11 . 12 from. The rolling bearing body raceways 18 to 23 are in the 5 bordered by dashed lines. The rolling bearing body 15 rolls on a rolling bearing body raceway 18 on the first track 11 and on a rolling bearing body raceway 19 on the second track 12 from. The rolling bearing body 16 rolls on the first track 11 on a rolling bearing body raceway 20 and on the second track 12 on a rolling bearing body raceway 21 from. The rolling bearing body 17 rolls on the first track 11 on a rolling bearing body raceway 22 and on the second track 12 on a rolling bearing body raceway 23 from.

The rolling bearing cage 14 is by means of cage positioning elements 24 to 27 relative to the first track 11 and the second track 12 positioned. For this purpose, the Käfigpositionierelemente 24 to 27 on the rails 11 . 12 slide. In particular, first or lateral cage positioning elements 24 . 27 provided to the rolling bearing cage 14 relative to the second track 12 to position. Second cage positioning elements 25 . 26 also as upper cage positioning elements 25 . 26 can be designated, are adapted to the rolling bearing cage 14 relative to the first track 11 and the second track 12 to position. The cage positioning element 25 serves to position the rolling bearing cage 14 at the first track 11 , The cage positioning element 26 serves to position the rolling bearing cage 14 on the second track 12 ,

The first cage positioning elements 24 . 27 are preferably outside or next to the rolling bearing body raceways 18 to 23 arranged and have a lubricant. The lubricant may be grease-based, for example. Alternatively, the lubricant may be a dry lubricant such as for example graphite. The first cage positioning elements 24 . 27 are furnished to sidewalls 28 . 29 the second track 12 to lie around the rolling bearing cage 14 relative to the second track 12 to position.

The first or side cage positioning elements 24 . 27 are theoretically without force, as a weight FG of on the second track 12 on-mounted accessories acts purely vertically, as in the 5 is indicated with two vertical arrows. Since such accessories are never completely flat, acts, as in the 5 shown, a larger force vector laterally on the second track 12 , The second track 12 is applied with a torque M. This leads to an increased frictional movement and a lateral application of force to the first cage positioning elements 24 . 27 , This allows the cage positioning 24 . 27 Abrade with time, leaving a radial clearance of the rolling bearing cage 14 as well as the running noise of the pull-out system 10 increase significantly, which in turn a lateral force vector F _{S is} increased. This can cause the rolling bearing cage 14 so far is ground that this with its complete side surface on the second track 12 rests and blocks.

This is prevented by the fact that the first cage positioning elements 24 . 27 have the lubricant. Also the second cage positioning elements 25 . 26 may include the lubricant. The first cage positioning elements 24 . 27 can be trained. The positioning elements 24 to 27 are preferably material integral with the rolling bearing cage 14 educated. In particular, the Käfigpositionierelemente 24 to 27 as imprints of the rolling bearing cage 14 be educated.

In an alternative embodiment of the extension system 10 has each cage positioning element 24 to 27 and in particular the first cage positioning elements 24 . 27 a recording area 30 for picking up the lubricant. The reception areas 30 may be formed as depressions, grooves, roughening, slits or the like. As the 5 shows are the shooting areas 30 preferably as in a longitudinal direction of the rolling bearing cage 14 or in a statement direction A ( 2 ) of the extraction system 10 extending slots or grooves formed. The grooves may for example have a rectangular, round or triangular geometry.

In a further embodiment of the extension system 10 are the cage positioning elements 24 to 27 and the rolling bearing cage 14 formed in several parts. In particular, the cage positioning elements 24 to 27 with the rolling bearing cage 14 screwed, riveted or pressed into this. Preferably, the cage positioning elements 24 to 27 made of a self-lubricating material. For example, the cage positioning elements 24 to 27 be made of a graphite material or a metallic sintered material. This allows the extension system 10 in comparison to a pull-out system without lubrication of the cage positioning elements 24 to 27 , in particular the cage positioning 24 . 27 to achieve a longer service life. Furthermore, this results in a better running behavior and a lower noise level when using the extension system 10 reached.

Although the present invention has been described with reference to embodiments, it is variously modifiable.

LIST OF REFERENCE NUMBERS

1

Haushaltsgargerät

2

oven

3

door

4

Handle

5

ground

6

blanket

7

rear wall

8th

Side wall

9

Side wall

10

pull-out system

11

runner

12

runner

13

Storage facility

14

Rolling bearing cage

15

Rolling body

16

Rolling body

17

Rolling body

18

Rolling body raceway

19

Rolling body raceway

20

Rolling body raceway

21

Rolling body raceway

22

Rolling body raceway

23

Rolling body raceway

24

Käfigpositionierelement

25

Käfigpositionierelement

26

Käfigpositionierelement

27

Käfigpositionierelement

28

Side wall

29

Side wall

30

reception area

A

extraction direction

F _G

force

F _S

force

M

torque

QUOTES INCLUDE IN THE DESCRIPTION

This list of the documents listed by the applicant has been generated automatically and is included solely for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Cited patent literature

• DE 102011052824 A1 [0003]

Claims (10)

Extract system ( 10 ) for a household cooking appliance ( 1 ), with a first track ( 11 ), a second track ( 12 ) and one between the first track ( 11 ) and the second track ( 12 ) arranged storage device ( 13 ), which has a rolling bearing cage ( 14 ) and a plurality in the rolling bearing cage ( 14 ) received rolling bearing body ( 15 . 17 ), wherein the first track ( 11 ) and the second track ( 12 ) by means of the storage facility ( 13 ) between a retracted state and an extended state of the statement system ( 10 ) are displaceable relative to each other, wherein when moving relative to each other of the rails ( 11 . 12 ) the rolling bearing bodies ( 15 . 17 ) along roller bearing body raceways ( 18 . 19 . 22 . 23 ) on the rails ( 11 . 12 ), whereby the rolling bearing cage ( 14 ) by means of first cage positioning elements ( 24 . 27 ) relative to the second track ( 12 ) and wherein the first cage positioning elements ( 24 . 27 ) outside the rolling bearing body raceways ( 18 . 19 . 22 . 23 ) are arranged and have a lubricant. Pull-out system according to claim 1, characterized in that second cage positioning elements ( 25 . 26 ) are adapted to the rolling bearing cage relative to the first track ( 11 ) and the second track ( 12 ). Pull-out system according to claim 1 or 2, characterized in that the first cage positioning elements ( 24 . 27 ) for positioning the rolling bearing cage ( 14 ) relative to the second track ( 12 ) are arranged on sidewalls ( 28 . 29 ) of the second track ( 12 ). Pull-out system according to one of claims 1-3, characterized in that the first cage positioning elements ( 24 . 27 ) in addition to the rolling bearing body raceways ( 18 . 19 . 22 . 23 ) are arranged. Pull-out system according to one of claims 1-4, characterized in that the first cage positioning elements ( 24 . 27 ) material integral with the rolling bearing cage ( 14 ) are formed. Pull-out system according to one of claims 1-5, characterized in that each first cage positioning element ( 24 . 27 ) a receiving area ( 30 ) for receiving the lubricant. Pull-out system according to one of claims 1-4, characterized in that the first cage positioning elements ( 24 . 27 ) and the rolling bearing cage ( 14 ) are formed in several parts. Pull-out system according to claim 7, characterized in that the first cage positioning elements ( 24 . 27 ) with the rolling bearing cage ( 14 ) screwed, riveted or pressed into this. Pull-out system according to claim 7 or 8, characterized in that the first cage positioning elements ( 24 . 27 ) are made of a self-lubricating material. Household cooking appliance ( 1 ) with a pull-out system ( 10 ) according to any one of claims 1-9.

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