DE102014225890A1 - Pull-out system and household cooker - Google Patents

Abstract

The invention relates to a pull - out system (10) for a household cooking appliance (1), comprising a first running rail (11), a second running rail (12), a bearing device (13) arranged between the running rails (11, 12), which has a roller bearing cage (14 ) and a plurality of rolling bearing bodies (15-17) accommodated in the rolling bearing cage (14), and a lubricating device (18) arranged between the running rails (11, 12), which has an open-pore lubricant storage structure (31), the first running rail (11 ) and the second running rail (12) by means of the bearing device (13) between a retracted state and an extended state of the extension system (10) are displaceable relative to each other, wherein when relatively displacing the rails (11, 12), the rolling bearing body (15- 17) roll along rolling bearing body raceways (19-24) on the rails (11, 12), and wherein the lubricating device (18) is adapted to the relative zueinande r displacing the rails (11, 12) to act on the rolling bearing body raceways (19-24) with a lubricant stored in the open-pore lubricant storage structure (31).

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 2012 218 007 A1 describes a pull-out system with a first track, a second track and a arranged between the rails bearing means with rolling bearing bodies. On the second rail, a lubricating device is provided, which is adapted to act on rolling bearing body raceways of the rolling bearing body with a solid lubricant or a liquid lubricant.

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

Accordingly, a pull-out system for a household appliance having a first rail, a second rail, a bearing device arranged between the rails, which has a roller bearing cage and a plurality of rolling bearing housings received in the rolling bearing cage, and a lubrication device provided between the rails is proposed. The lubricating device comprises an open-pore lubricant storage structure, wherein the first running rail and the second running rail are displaceable relative to each other with the aid of the bearing device between a retracted state and an extended state of the extension system, wherein when rolling rails are displaced relative to each other, the rolling bearing bodies roll along rolling bearing body raceways on the running rails, and wherein the lubricating device is adapted to act on the rolling bearing body raceways with a stored in the open-pored lubricant storage structure lubricant during relative displacement of the rails.

Due to the porous, open structure of the lubricant storage structure significantly more lubricant can be stored than on the bare rolling bearing body raceways. During operation of the extraction system, the lubrication device thus continuously lubricates the roller bearing body raceways. When using the Haushaltsgargeräts the same damp, fatty vapors are deposited in a cooking chamber, which secrete increased by the large surface of the lubricant storage structure in this. The lubricant storage structure preferably distributes this natural oiling over the entire running area of the rails.

According to one embodiment, the roller bearing cage has a recess for receiving the lubricating device.

In particular, the lubrication device is loosely inserted into the recess. Because the lubricating device is a separate component from the roller bearing cage, the lubricating device may or may not be used modularly as needed.

According to a further embodiment, the lubricating device is mounted on the first running rail or the second running rail.

For this purpose, can be provided on one or both of the rails driver elements to realize a Mitführfunktion for carrying the lubricating device.

According to a further embodiment, the open-pore lubricant storage structure is formed from compressed, woven, entangled, entangled and / or felted fibers.

The term "open-pored" is to be understood here as meaning that cavities, pores and / or channels of the lubricant storage structure are connected to one another and to the environment.

According to a further embodiment, channels, cavities and / or pores are provided between the fibers for forming the open-pored lubricant storage structure.

The lubricant is absorbed in the channels, cavities and / or pores. The lubricant storage structure preferably stores the lubricant in a sponge fashion.

The lubricant may be a grease-based lubricant or a powdered solid lubricant.

According to another embodiment, the fibers are metal fibers, ceramic fibers or alkaline earth fibers.

In particular, the fibers are resistant to pyrolysis.

According to a further embodiment, the open-pored lubricant storage structure is made of a sintered material or a spongy material.

For example, the lubricant storage structure may be made of a metallic or ceramic sintered material. Furthermore, the lubricant storage structure can be made, for example, of highly porous basalt.

According to a further embodiment, the lubricating device is adapted to act on when relatively displacing the rails relative to contact areas between the roller bearing cage and the rails with the lubricant stored in the open-pored lubricant storage structure.

The rolling bearing cage preferably has cage positioning elements which can slide on the rails.

According to a further embodiment, the second running rail has a filling opening for filling the lubricating device with lubricant.

The lubricating device can be filled, for example, with a temperature-resistant food oil such as rapeseed oil. For closing the filling opening, a plug may be provided which is pressed or screwed into the filling opening.

According to a further embodiment, the rolling bearing cage is arranged in the retracted state of the extension system in a predetermined position, so that the filling opening is arranged above the lubricating device.

For this purpose, corresponding stops can be provided on the rails, against which the roller bearing cage rests in the retracted state of the extension system. The stops are used to position the rolling bearing cage in the predetermined position. Preferably, the lubricating device is received in the rolling bearing cage.

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

The Haushaltsgargerät is for example an oven, a microwave oven or a microwave oven.

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 an enlarged schematic view of the extension system according to the 2 ;

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

6 shows a schematic sectional view along the section line VI-VI of 5 ;

7 shows a schematic sectional view along the section line VII-VII of 5 ; and

8th shows an enlarged schematic perspective 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 of over 450 ° C.

The 2 shows a schematic perspective view of an embodiment 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 the two 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 attached. The first track 11 has approximately a T-shape in cross-section. 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 recorded rolling bearing body 15 to 17 on ( 6 ). 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 , Furthermore, the extract system includes 10 one between the first track 11 and the second track 12 arranged lubrication device 18 ,

The rolling bearing body 15 to 17 can be spherical or cylindrical. As the 6 shows, are the rolling bearing body 15 . 17 for example, as balls and the rolling bearing body 16 is 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 19 to 24 on the rails 11 . 12 off ( 6 ). The rolling bearing body raceways 19 to 24 are in the 6 bordered by dashed lines. The rolling bearing body 15 rolls on a rolling bearing body raceway 19 on the first track 11 and on a rolling bearing body raceway 20 on the second track 12 from. The rolling bearing body 16 rolls on the first track 11 on a rolling bearing body raceway 21 and on the second track 12 on a rolling bearing body raceway 22 from. The rolling bearing body 17 rolls on the first track 11 on a rolling bearing body raceway 23 and on the second track 12 on a rolling bearing body raceway 24 from.

The rolling bearing cage 14 is by means of cage positioning elements 25 to 30 relative to the first track 11 and the second track 12 positioned. For this purpose, the Käfigpositionierelemente 25 to 30 on the rails 11 . 12 slide. In particular, first or lateral cage positioning elements 25 . 26 . 29 . 30 provided to the rolling bearing cage 14 in the vertical direction relative to the first track rail 11 and the second track 12 to position. Second cage positioning elements 27 . 28 Also called upper cage positioning elements 27 . 28 can be designated, are adapted to the rolling bearing cage 14 in the horizontal direction relative to the first track 11 and the second track 12 to position. The cage positioning element 27 is used for horizontal positioning of the rolling bearing cage on the first track 11 , The cage positioning element 28 serves for horizontal positioning of the roller bearing cage 14 on the second track 12 ,

The 7 shows the rails 11 . 12 along the step line VII-VII according to the 5 , The lubrication device 18 has an open-pore lubricant storage structure 31 on. The Lubricant storage structure 31 has cavities, pores and / or channels. The term "open-pore" is to be understood here as meaning that the cavities, pores and / or channels are connected to one another and to the environment. In the lubricant storage structure 31 Preferably, a lubricant is stored. The lubricant storage structure 31 is designed to store the sponge-like lubricant and release it again. The lubricant may be a liquid or pasty grease-based lubricant or a powdered solid lubricant such as graphite. During the initial production of the pull-out system 10 becomes the lubrication device 18 provided with incorporated lubricating elements or impregnated directly with lubricant. The lubricant storage structure 31 can one between the rails 11 . 12 completely fill the provided cavity.

The open-pore lubricant storage structure 31 is preferably made of pressed-together, woven, entangled, entangled and / or felted fibers. Alternatively, the open-pored lubricant storage structure 31 be made of a sintered material or a spongy material such as a highly porous basalt block. Between the fibers of the lubricant storage structure 31 the cavities, pores and / or channels are provided. The fibers are preferably metal fibers, ceramic fibers or alkaline earth fibers. The lubricant storage structure 31 gets loose in the rails 11 . 12 entrained and via a corresponding recess 32 in the rolling bearing cage 14 positioned or fixed within the outer track 12 stored.

When moving relative to each other of the rails 11 . 12 run the rolling bearing body 15 to 17 along the rolling bearing body raceways 19 to 24 on the rails 11 . 12 from, with the lubricating device 18 is arranged to relocate the rails relative to each other 11 . 12 the rolling bearing body raceways 19 to 24 with the in the open-pore lubricant storage structure 31 to apply stored lubricant. Furthermore, the lubrication device 18 also adapted to relocate relative to each other of the rails 11 . 12 Contact areas between the rolling bearing cage 14 , in particular the cage positioning elements 25 to 30 , and the rails 11 . 12 with the in the open-pore lubricant storage structure 31 to apply stored lubricant.

As the 2 and 8th show is on the second track 12 a filling opening 33 intended. As a result, the lubricant storage structure 31 be soaked with lubricant before commissioning or it can be refilled lubricant subsequently. The filling opening 33 can with the help of a plug 34 be closed. The stopper 34 can in the filling opening 33 be pressed or screwed.

Due to the porous, open structure of the lubricant storage structure 31 significantly more lubricant can be stored than on the bare rolling bearing body raceways 19 to 24 and the contact areas between the cage positioning elements 25 to 30 and the rails 11 . 12 , During operation of the extension system 10 lubricates the lubrication device 18 thus the rolling bearing body raceways 19 to 24 and the contact areas between the cage positioning elements 25 to 30 and the rails 11 . 12 continuously after.

In pyrolysis, a loses in the lubricant storage structure 31 stored grease lubricant its supple structure and initially leaves only solid lubricant particles, which also have a good lubricating effect. When using the household cooking appliance 1 be in the oven 2 damp, fatty vapors deposited, which are also in the extraction system 10 and increased by the large surface area in the lubricant storage structure 31 drop. This shows the extension system 10 Although, as in known pullout systems without such lubrication 18 , after pyrolysis a rough run with dry greasing on, but the running behavior improves automatically by natural moisturizing. The lubricant storage structure 31 distributes this natural lubrication to the entire running area of the rails 11 . 12 ,

Furthermore, decompose the organic deposits in the lubricant storage structure 31 by pyrolysis turn to new graphite and thus produce an almost inexhaustible re-greasing of the extraction system 10 , About the filling opening 33 For example, refractory food oil such as rapeseed oil may be filled. The oil runs along the lubricant storage structure 31 and thanks to direct access, it fills all running areas of the rails 11 . 12 , Excess fat breaks down again at the latest during pyrolysis to new graphite and greases again. As it is the lubrication device 18 is an additional component, which is not the rolling bearing cage 14 It can be modularly used as required or omitted.

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

 lubricator

19

 Rolling body raceway

20

 Rolling body raceway

21

 Rolling body raceway

22

 Rolling body raceway

23

 Rolling body raceway

24

 Rolling body raceway

25

 Käfigpositionierelement

26

 Käfigpositionierelement

27

 Käfigpositionierelement

28

 Käfigpositionierelement

29

 Käfigpositionierelement

30

 Käfigpositionierelement

31

 Lubricant storage structure

32

 recess

33

 filling

34

 Plug

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 102012218007 A1 [0003]

Claims (11)

Extract system ( 10 ) for a household cooking appliance ( 1 ), with a first track ( 11 ), a second track ( 12 ), one between the rails ( 11 . 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 ), and one between the rails ( 11 . 12 ) arranged lubrication device ( 18 ) which has an open-pored lubricant storage structure ( 31 ), 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 ( 19 - 24 ) on the rails ( 11 . 12 ), and wherein the lubricating device ( 18 ) is adapted, when relative to each other relocating the rails ( 11 . 12 ) the roller bearing body raceways ( 19 - 24 ) with a in the open-pored lubricant storage structure ( 31 ) to apply stored lubricant. Pull-out system according to claim 1, characterized in that the roller bearing cage ( 14 ) a recess ( 32 ) for receiving the lubricating device ( 18 ) having. Pull-out system according to claim 1, characterized in that the lubricating device ( 18 ) on the first track ( 11 ) or on the second track ( 12 ) is stored. Pull-out system according to one of claims 1-3, characterized in that the open-pored lubricant storage structure ( 31 ) is formed from compressed, woven, entangled, entangled and / or matted fibers. Pull-out system according to claim 4, characterized in that for forming the open-pored lubricant storage structure ( 31 ) between the fibers channels, cavities and / or pores are provided. Pull-out system according to claim 4 or 5, characterized in that the fibers are metal fibers, ceramic fibers or alkaline earth fibers. Pull-out system according to one of claims 1-3, characterized in that the open-pored lubricant storage structure ( 31 ) is made of a sintered material or a sponge-like material. Pull-out system according to one of claims 1-7, characterized in that the lubricating device ( 18 ) is adapted, when relative to each other relocating the rails ( 11 . 12 ) Contact areas between the rolling bearing cage ( 14 ) and the rails ( 11 . 12 ) with the in the open-pored lubricant storage structure ( 31 ) to apply stored lubricant. Pull-out system according to one of claims 1-8, characterized in that the second track ( 12 ) a filling opening ( 33 ) for filling the lubricating device ( 18 ) with lubricant. Pull-out system according to claim 9, characterized in that the roller bearing cage ( 14 ) in the retracted state of the extension system ( 10 ) is arranged in a predetermined position, so that the filling opening ( 33 ) above the lubrication device ( 18 ) is arranged. Household cooking appliance ( 1 ) with a pull-out system ( 10 ) according to any one of claims 1-10.

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