EP3172492A1

EP3172492A1 - Roller, deployment system, and domestic cooking appliance

Info

Publication number: EP3172492A1
Application number: EP15732213.2A
Authority: EP
Inventors: Alexander Dinkel; Philipp Schaller
Original assignee: BSH Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2014-07-21
Filing date: 2015-06-24
Publication date: 2017-05-31
Also published as: WO2016012183A1; DE102014214170A1; US20170122572A1

Abstract

The invention relates to a roller (18-21) for a cooking item support system (10), in particular for a deployment system, of a domestic cooking appliance (1), comprising a roller body (26) and an antifriction bearing (27) which is accommodated at least partly in the roller body (26) and is used for supporting the roller (18-21) against or on a roller pin (28) of the cooking item support system (10).

Description

Caster, pull-out system and household cooker

The present invention relates to a roller, a Gargutträgersystem and a

Haushaltsgargerät. For Haushaltsgargeräte such as ovens, there are so-called

Gargutträgersysteme, 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. DE 10 2008 010 501 A1 describes such a product support system for a

Haushaltsgargerät. The food carrier system has rails, which are guided on rollers.

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

Accordingly, a roller for a Gargutträgersystem, in particular for a

Pull-out system, a Haushaltsgargeräts with a roller body and at least partially recorded in the roller body slide bearing proposed for supporting the roller on or on a roller axle of the Gargutträgersystems.

The fact that the slide bearing is provided, can be dispensed with a grease lubrication. In contrast, in a bearing provided with a grease lubrication the functionality of the roller over the life of the Gargutträgersystems with a frequent cleaning of the same in a dishwasher or with the help of pyrolysis would not be guaranteed. This is also in the cleaning of the

Gargutträgersystems in a dishwasher always the functionality of

Guaranteed product carrier system. In particular, the roller body and the sliding bearing are made in two parts.

According to one embodiment, the sliding bearing is received in a receiving portion of the roller body. The receiving portion may be a completely breaking through the roller body bore. The plain bearing can, in particular loose, be inserted into the receiving portion. According to a further embodiment, the sliding bearing is frictionally engaged with the

Receiving section connected.

The slide bearing can be pressed into the receiving portion. Between the slide bearing and the receiving portion may be provided a press fit.

According to a further embodiment, the sliding bearing is positively connected to the

Receiving section connected.

In this way, a rotation of the sliding bearing can be prevented relative to the roller body. The plain bearing can also be non-positively and positively connected to the receiving portion. In a purely interlocking connection can be dispensed with a highly accurate and thus consuming and costly produced fitting system between the sliding bearing and the roller body. According to a further embodiment, the sliding bearing has an engagement portion which engages positively in a mating engagement portion of the receiving portion.

The engagement portion may be a lateral flattening of the particular tubular or cylindrical plain bearing. The counter-engagement portion is preferably formed corresponding to the lateral flattening of the sliding bearing. Alternatively, the engagement portion and the counter engagement portion may form a tongue and groove joint. As a result, a coding is achieved, thus precluding a faulty installation of the sliding bearing.

According to a further embodiment, the slide bearing on two separate bearing elements, the opposite end portions of the

Recording section are included in this. The end portions of the receiving portion preferably have a larger one

Diameter as a disposed between the end portions of the receiving portion.

According to a further embodiment, the roller body is made of a steel material or a ceramic material.

This provides sufficient heat resistance, even in the pyrolysis of the

Household cooking appliance, guaranteed. According to a further embodiment, the sliding bearing is made of a

Metal sintered material, a ceramic material or a graphite material manufactured.

In particular, highly compacted sintered materials with incorporated solid lubricants in a bronze or iron matrix are suitable materials for the slide bearing. These have a good chemical and a very good temperature resistance. Furthermore, various ceramic materials with excellent tribological properties such as zirconium oxide, silicon carbide or silicon nitride can be used for the plain bearings. Alternatively, specialty graphite can be used as the sliding bearing material.

According to a further embodiment, the roller body has a cylindrical, convex or concave tread.

If the food support system has tubular or rod-shaped rails, preferably concave running surfaces are provided on the rollers. Alternatively, in the case of C-shaped rails, spherical or convex running surfaces may be provided on the roller bodies.

Furthermore, a food support system, in particular a pull-out system, for a

Haushaltsgargerät with at least one such roller and at least one

Guide rail proposed, wherein the at least one roller is adapted to unroll on the at least one running rail. The pull-out system can also be referred to as a telescopic extension system. The rails can also be referred to as guide rails.

According to one embodiment, the Garguttragersystem a roller axis, on or on which the at least one roller is rotatably mounted.

The roller axle can be made of steel or ceramic.

According to a further embodiment, the roller axle is fixed to a carrier of the food support system, wherein the carrier is connectable to a side wall of a cooking chamber of the Haushaltsgargeräts.

The carrier has in particular a fastening section. With the help of

Fixing section is the food support system with the side wall connectable.

According to a further embodiment, the Gargutträgersystem is removed from the oven.

Preferably, the food support system is tool-free removed from the oven. As a result, the food support system can be easily removed from the oven and cleaned, for example, in a dishwasher.

Furthermore, a Haushaltsgargerät proposed with such a roller and / or such Gargutträgersystem.

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

According to one embodiment, two Gargutträgersysteme are provided which are provided on opposite side walls of a cooking chamber of Haushaltsgargeräts.

Other possible implementations of the roller, the food carrier system and / or the Haushaltsgargeräts include not explicitly mentioned combinations of previously or in the following with respect to the embodiments described features or embodiments. The expert will also add individual aspects as improvements or additions to the respective basic shape of the roller, the Garguttragersystems and / or Haushaltsgargeräts. Further advantageous embodiments and aspects of the roller, the food support system and / or the Haushaltsgargeräts are the subject of the dependent claims and the embodiments of the roller described below, the food support system and / or the Haushaltsgargeräts. Furthermore, the roller, the

Gargutträgersystem and / or the Haushaltsgargerät based on preferred

Embodiments with reference to the accompanying figures explained in more detail.

Fig. 1 shows a schematic perspective view of an embodiment of a Haushaltsgargeräts; FIG. 2 shows a schematic perspective view of an embodiment of a food support system for the domestic appliance according to FIG. 1; FIG.

FIG. 3 shows a schematic side view of the food support system according to FIG. 2; FIG. FIG. 4 shows a schematic sectional view of the food carrier system according to FIG. 2; FIG.

FIG. 5 shows a schematic side view of a further embodiment of a food support system for the household appliance according to FIG. 1; FIG. 6 shows a schematic sectional view of an embodiment of a roller for the food support system according to FIGS. 2 to 5;

FIG. 7 shows a schematic side view of a further embodiment of a food support system for the domestic appliance according to FIG. 1; FIG. and

FIG. 8 shows a schematic sectional view of the food carrier system according to FIG. 7. In the figures, the same or functionally identical elements have been given the same reference numerals, unless stated otherwise.

Fig. 1 shows a schematic perspective view of a Haushaltsgargeräts 1. The Haushaltsgargerät 1 is for example an oven, a microwave oven, a steamer, a microwave oven or the like. The

Haushaltsgargerät 1 has a muffle or a cooking chamber 2, which is closed by a door 3. The cooking chamber 2 can inside a housing of the

Household cooking appliance 1 can be arranged. The door 3 is shown in Fig. 1 in its closed position. By pivoting about a provided at a lower end of the door 3 pivot axis, the door 3 can be closed or opened. Alternatively, the door 3 can be struck laterally on the cooking chamber 2. Furthermore, the door 3 can be arranged on a withdrawable from the cooking chamber 2 baking carriage. At an upper portion of the door 3, a handle 4 may be provided. The cooking chamber 2 has a bottom 5, a cover 5 arranged opposite the bottom 5, a rear wall 7 arranged opposite the door 3 and two side walls 8, 9 arranged opposite one another. The cooking chamber 2 is preferably cuboid or cube-shaped. The cooking chamber 2 may be made of a metal material, in particular of a steel sheet.

2 shows a schematic perspective view of an embodiment of a food support system 10 for the household cooking appliance 1. The food support system 10 is in particular an extension system. The pull-out system can also be called

Telescopic extension system can be called. The food support system 10 has a first track rail 1 1 and a spaced from the first track rail 1 1 arranged second track rail 12. The rails 1 1, 12 may also be referred to as guide rails. With a mounting portion 13, the food support system 10 is releasably fastened in or on the cooking chamber 2. In particular, two such Gargutträgersysteme 10 are provided in or on the cooking chamber, which are preferably mounted on the opposite side walls 8, 9 of the cooking chamber 2. For cleaning the food support system 10, for example in a dishwasher, the food support system 10 or the food support systems 10 can be removed from the cooking chamber 2. On the second or upper rail 12 accessories such as a

Baking tray or a baking grid are stored. The rails 1 1, 12 are

spaced apart from each other and connected by means of two connecting portions 14, 15 with each other. The connecting portions 14, 15 are plate-shaped. At the attachment portion 13, a recess 16 may be provided by means of which the food support system 10 on one of the side walls 8, 9 can be fastened.

The Gargutträgersystem 10 further comprises a support 17, are rotatably mounted on the rollers 18 to 21. As shown in FIG. 2, four rollers 18 to 21

be provided, with two rollers 18, 19 and 20, 21 are arranged in pairs. The rollers 18 to 21 are adapted to unroll on the rails 1 1, 12. The rollers 18 to 21 are rotatably mounted on the carrier 17. The carrier 17 is preferably materialeinstückig connected to the attachment portion 13. The attachment portion 13 and the carrier 17 may be a sheet metal bending member. The carrier 17 comprises the attachment portion 13. The rollers 18 to 21 are arranged between the rails 1 1, 12.

3 shows in a schematic side view, run the rollers 18, 21 on the second or upper track rail 12. The rollers 19, 20 run on the first or lower track rail 1 1. These are central axes 23, 24 of the rollers 19, 20 with respect to central axes 22, 25 of the rollers 18, 21 positioned offset.

4 shows a section through the food support system 10 at the level of the roller 18. As shown in FIG. 4, the rails 1 1, 12 are tubular. Alternatively, the rails 1 1, 12 may be solid. The roller 18 has a

Casters body 26 on. The roller body 26 is made of a steel material or a ceramic material. The roller body 26 is pyrolysefähig. That is, the roller body is not damaged even at high temperatures, especially at temperatures above 450 ° C.

The roller 18 further comprises an at least partially received in the roller body 26 slide bearing 27 for supporting the roller 18 on or on a

Caster axle 28 of the product support system 10. The roller axle 28 is on the Carrier 17 attached. For example, the roller axle 28 may be screwed into the carrier 17 or riveted to it. The roller axle 28 has a disk-shaped end portion 29 which prevents the roller 18 from slipping off the roller axle 28. The end portion 29 covers the sliding bearing 27 completely. As a result, abrasion or discoloration of the sliding bearing 27 due to high temperature stress can be laminated.

As shown in FIG. 4, the sliding bearing 27 is made in one piece in one embodiment and penetrates the roller body 26 completely. The end portion 29 of the

Caster axle 28 is located on the front side of the sliding bearing 27 and partially on the

Casters body 26 on. The sliding bearing 27 is tubular. The sliding bearing 27 is received in a receiving portion 30 of the roller body 26. The receiving portion 30 may be a roller body 26 piercing bore. The sliding bearing 27 may be non-positively connected to the receiving portion 30. That is, the sliding bearing 27 may be press-fitted into the receiving portion 30. Alternatively or additionally, the slide bearing 27 may be positively connected to the receiving portion 30.

The sliding bearing 27 is preferably made of a metal sintered material, a

Made of ceramic material or a graphite material. In particular, can be dispensed with an additional lubrication of the sliding bearing 27. As a result, the sliding bearing 27 retains its tribological properties even when cleaning the

Gargutträgersystems 10 in a dishwasher or by means of pyrolysis. The sliding bearing 27 is temperature resistant. In particular, the sliding bearing 27 is capable of pyrolysis. For example, come as materials for the sliding bearing 27 highly compressed

Sintered materials with embedded solid lubricants in a bronze or iron matrix in question. These materials have a good chemical and a very good one

Temperature resistance on. Furthermore, 27 different ceramic materials with excellent tribological properties such as zirconium oxide, silicon carbide or silicon nitride can be used for the sliding bearing. In addition, as

Slide bearing material special graphite can be used. In addition to good mechanical properties and high temperature resistance, this material also has good chemical resistance. By selecting the aforementioned plain bearing materials good rolling properties or a good feel of the rollers 18 to 21 and the Gargutträgersystems 10 are achieved despite the omission of lubricants. An elaborate lubrication of the roller axles 28 can be dispensed with. By dispensing with the greasing can also no shear between bearings 27 and

Caster axle 28 emerge and contaminate the food support system 10 and / or the cooking chamber 2. As shown in FIG. 4, the roller body 26 may have a concave tread 31.

5 shows a schematic side view of a further embodiment of a food support system 10. As shown in FIG. 5, the receiving portion 30 of the roller body 26 of the roller 19 comprises a counter-engagement portion 32, in a

Engaging portion 33 of the sliding bearing 27 engages. The engaging portion 33 is a lateral flattening of the sliding bearing 27. The counter-engaging portion 32 of

Receiving portion 30 of the roller body 26 is also a corresponding flattening of the receiving portion 30. As a result, a coding during installation of the sliding bearing 27 is achieved in the roller body 26. An incorrect assembly of the sliding bearing 27 is prevented. Furthermore, can be dispensed with a non-positive connection of the sliding bearing 27 with the roller body 26. Excessive mechanical stress on the sliding bearing 27 and thus damage to the same are thereby reliably prevented. By coding can be dispensed with an otherwise required high-precision fitting system between the sliding bearing 27 and the roller body 26. In this way, the food support system 10 can be produced inexpensively and easily. Such coding may be provided on all rollers 18 to 21.

6 shows a schematic sectional view of another embodiment of a roller 18. The roller 18 according to FIG. 6 differs from the rollers 18 to 21 according to FIGS. 2 to 5 in that the sliding bearing 27 has two separate bearing elements 34 , 35. The disc-shaped end portion 29 of the

Caster axle 28 is preferably located on the front side of the bearing element 34 and prevents it from slipping out of the receiving portion 30. This also beyond a direct contact of the end portion 29 is prevented with the roller body 26. The bearing elements 34, 35 may be positively and / or positively received in the roller body 26. The bearing elements 34, 35 are at opposite end portions 36, 37 of the receiving portion 30 in this added. The end portions 36, 37 preferably have a larger one

Diameter as a disposed between the end portions 36, 37 portion of the receiving portion 30th

7 shows a schematic side view of a further embodiment of a product support system 10. The product support system 10 according to FIG. 7 differs from the product support system 10 according to FIGS. 2 to 5 in that the running rail, as shown in FIG. C-shaped. For example, the Gargutträgersystem 10 only three rollers 18 to 20 and a running rail 1 1 on. The rollers 18 to 20 preferably have a convex or spherical tread 31. The rollers 18, 19 run on top of or in the C-shaped track rail 1 1 and the roller 20 runs on the underside or in the C-shaped track rail 1 first

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

Used reference signs:

1 household cooking appliance

2 cooking space

3 door

4 handle

5 floor

6 ceiling

7 rear wall

8 side wall

9 side wall

10 food carrier system

1 1 track rail

12 track rail

13 fixing section

14 connecting section

15 connecting section

16 recess

17 carriers

18 roller

19 roller

20 roller

21 roller

22 central axis

23 central axis

24 central axis

25 central axis

26 roller body

27 plain bearings

28 roller axle

29 end section

30 receiving section

31 tread

32 counter-engagement section Engaging portion bearing element bearing element end portion end portion

Claims

1. roller (18 - 21) for a Gargutträgersystem (10), in particular for a

Pullout system, a household cooking appliance (1), comprising a roller body (26) and a slide bearing (27) at least partially received in the roller body (26) for supporting the roller (18 - 21) on or on a roller axle (28) of the roller

Food carrier system (10).

2. Castor according to claim 1, characterized in that the sliding bearing (27) is received in a receiving portion (30) of the roller body (26).

3. Castor according to claim 2, characterized in that the sliding bearing (27) is non-positively connected to the receiving portion (30).

4. Roller according to claim 2 or 3, characterized in that the sliding bearing (27) is positively connected to the receiving portion (30).

5. Castor according to claim 4, characterized in that the sliding bearing (27) has an engagement portion (33) which engages positively in a mating engagement portion (32) of the receiving portion (30).

6. Castor according to one of claims 2-5, characterized in that the sliding bearing (27) has two separate bearing elements (34, 35) which are received at opposite end portions (36, 37) of the receiving portion (30) in this ,

7. Castor according to one of claims 1-6, characterized in that the rollers body (26) is made of a steel material or a ceramic material.

8. Roller according to one of claims 1-7, characterized in that the sliding bearing (27) is made of a metal sintered material, a ceramic material or a graphite material.

9. Castor according to one of claims 1-8, characterized in that the

Casters body (26) has a cylindrical, convex or concave tread (31).

10. Gargutträgersystem (10) for a Haushaltsgargerät (1), with at least one roller (18 - 21) according to any one of claims 1-9 and at least one running rail (1 1, 12), wherein the at least roller (18 - 21) to is set to roll on the at least one running rail (1 1, 12).

1 1. Gargutträgersystem according to claim 10, characterized by a roller axle (28) on or on which the at least one roller (18 - 21) is rotatably mounted.

12. Gargutträgersystem according to claim 1 1, characterized in that the

Roller axle (28) on a support (17) of the food support system (10) is fixed, wherein the carrier (17) with a side wall (8, 9) of a cooking chamber (2) of the

Haushaltsgargeräts (1) is connectable.

13. Gargutträgersystem according to claim 12, characterized in that the

Gargutträgersystem (10) from the cooking chamber (2) can be removed.

14. Haushaltsgargerät (1) with a roller (18 - 21) according to any one of claims 1-9 and / or a Gargutträgersystem (10) according to any one of claims 10-13.

15. Haushaltsgargerät according to claim 14, characterized by two

Gargutträgersysteme (10), which are provided on opposite side walls (8, 9) of a cooking chamber (2) of the Haushaltsgargeräts (1).