EP2347074A1

EP2347074A1 - Domestic appliance with bearing pins having twist lock for bearing bushes

Info

Publication number: EP2347074A1
Application number: EP09753075A
Authority: EP
Inventors: Andreas Guba; Alfred Raab; Harald Stelzer
Original assignee: BSH Bosch und Siemens Hausgeraete GmbH
Current assignee: BSH Hausgeraete GmbH
Priority date: 2008-11-18
Filing date: 2009-11-09
Publication date: 2011-07-27
Also published as: DE102008043811A1; RU2011121446A; WO2010057790A1; CN102216549A

Abstract

The invention relates to a domestic appliance, in particular, a refrigerator, comprising at least one hinge for mounting a door of the domestic appliance, wherein the hinge has a bearing pin (20) with at least one first free end (22) and a bearing bush (30) which has a housing (32) for a free end (22) of the bearing pin (20) and a through channel (34) for a cable and is designed to be able to plugged on the first free end (22) of the bearing pin (20) on assembly, wherein the bearing pin (20) has a first positioning device which guarantees that the bearing bush (30) may be plugged onto the first free end (22) of the bearing pin (20) only in a first angular position and not in a second angular position.

Description

Household appliance with bearing pin with anti-rotation lock for bearing bush

The present invention relates to a household appliance, in particular a refrigerator, with at least one hinge for supporting a door of the household appliance, wherein the hinge nier a journal with at least one free end and a mountable on the free end bushing, wherein the bearing bush a receptacle for having the free end of the journal and a passageway for a cable.

When mounting the door of a household appliance mentioned above is as an assembly step, inter alia, the bearing bush aufzustecken on a free end of the journal. In embodiments of the household appliance, in which a cable from the household appliance is to be placed in the door and thus this is guided by the feedthrough of the bearing bush, the bushing by the performed cable for this reason alone only in the correct angular position on the free end of the journal can be plugged. However, if the free end of the journal and the corresponding receptacle of the bushing formed symmetrically, the bushing could be plugged upside down on a mounting without cable - which is common in some variants of household appliances - on the free end of the journal. This would mean that the bearing bushing was twisted by 180 ° relative to the correct angular position on the free end of the journal plugged. If the receptacle for the free end of the journal is not centered, but eccentric in the bearing bush, this means that the pivot axis of the door is moved and thus may not close the door properly.

The present invention is therefore an object of the invention to provide a household appliance with at least one hinge for storing a door of the household appliance, wherein the bearing bush in the assembly in any case in a first, correct angular position on the free end of the journal and not can be plugged in a second, wrong angle position.

This object is achieved with a household appliance according to claim 1. Advantageous developments of the invention are the subject of the dependent claims. According to the invention, the household appliance, in particular a refrigerator or a freezer, has a hinge for supporting a door of the domestic appliance, wherein the hinge has a bearing journal which has at least one first free end. In addition, the household appliance has a bearing bush with a passage channel for a cable, which comprises a receptacle into which the at least one free end of the bearing journal can be inserted during assembly. An automatically correct positioning of the bearing bush on the bearing journal in a first, namely the correct, angular position is achieved in that the bearing journal has a positioning device which ensures that the bearing bush is not in a second, namely wrong, angular position but only in the first Angular position can be plugged onto the first free end of the journal. The term "first" or "right angular position" is understood here and below to mean the position which is absolutely necessary for a correct installation of the door on the bearing journal, possibly with a cable. As a result, the mounting of the bearing bush to the journal can be simplified because no control is required, whether the bearing bush is really put on properly.

According to a preferred embodiment of the invention, the bearing pin additionally has a second free end, which faces away from the first free end, and a second positioning, which ensures that the bearing bushing only in the first angular position and not in a second angular position on the second free end of the journal is attachable. Since the journal has two provided with a corresponding positioning free ends, it can be mounted in two different positions on the household appliance, which are suitable for a left stop or a right stop of the door.

If the first positioning means are arranged in the region of the first free end of the bearing journal and the second positioning in the region of the second free end of the bearing journal, it is advantageously ensured that these positioning devices can be effective at the earliest possible time when the bearing bushing is fitted.

A particularly simple positioning can be ensured if the first and possibly also the second positioning device with a respective position nierhilfe can cooperate, which is attached to the bearing bush or are. It is particularly advantageous that the positioning at least partially or approximately the same contour as the position aid, so that these two elements cooperate well when attaching the bearing bush to a free end of the journal - for example, engage with each other - can. One possibility of the embodiment of the positioning aid is, for example, an axially extending slot in which a positioning device designed as a cam or projection can be guided.

It is advantageous if the bearing journal is part of a bearing angle which is symmetrical to a plane which is transverse to the direction defined by the extension from the first free end to the second free end. This direction corresponds at least approximately to the direction of the pivot axis. The symmetrical design results in a particularly simple assembly, regardless of whether the bearing angle or the bearing pin is used for a left or a right hinged or hinged door.

The bearing angle or the bearing journal is preferably formed from a flat material blank, in particular from a sheet metal blank. Particularly preferably, the bearing angle or the bearing pin is made of a steel sheet, wherein in a particularly preferred manner high-strength steel such as chromium steel or chromium nickel steel is used. Alternatively, bearing bracket and journals could also be made as a casting. The thickness of the flat material blank is usually 3 mm to 7 mm, with a thickness of about 5 ± 1 mm being preferred.

The bearing angle or the bearing pin can be manufactured in a simple manner as a stamped / bent part, preferably by punching from a steel sheet and subsequent bending. In this way, the bearing pin can be made in one piece with the bearing angle, whereby this arrangement can be produced inexpensively and still has a high strength.

It is preferred to design the bearing journal such that the first angular position is rotated by substantially 180 ° with respect to the second angular position, about an axis extending in the direction of the extension from the first free end to the second free end runs. As a result, the bearing pin is particularly well suited for use in the left and hinged or hinged doors right.

According to an advantageous embodiment of the invention, the outer contour of the bearing bush in cross-section at least substantially the shape of a circle, and the receptacle for the free end of the journal is arranged eccentrically in the substantially circular cross-section. As a result, the feedthrough channel can also be arranged in the bearing bush without unnecessarily increasing its space requirement.

Advantageously, the receptacle for the free end of the journal and the passage channel are connected to each other at least in sections. It is also advantageous if the bearing pin is formed as a flat part, in particular as flat material blank, which can be inserted into the correspondingly shaped receptacle in the bearing bush. The feedthrough channel of the bearing bush is connected to the receptacle without an intermediate wall. As a result, the bearing bush is produced in a simple manner as an injection molded part and can be plugged easily due to the described shape on the free end of the journal.

It is preferable to form the receptacle for the free end of the bearing journal in mirror symmetry in cross section. As a result, a simpler attachment of the bearing bush on the bearing pin is given both left-hand and right-hinged door.

A particularly simple and convenient design of the journal results when the positioning, which ensures positioning of the bearing bush in the correct angular position, is formed from at least one located in the region of the respective free end of the journal projection, which in turn is intended to itself into the positioning aid - serving as the preferably the feedthrough channel - to extend the bushing into it. This can be ensured in a particularly simple manner that the bearing bush can be plugged only in the correct angular position on the free end of the journal, because when trying to plug in the wrong angular position of the protrusion blocking plugging, as no corresponding bulge or opening in the bearing bush is present. The bearing pin can be produced in a particularly simple manner if the projection has at least substantially the same volume as a depression located in its vicinity. That is, the projection can be made not only by appropriate punching and, if appropriate, suitable bending of a corresponding material portion, but also by a displacement or displacement of material from the recess. Thus, a notch at a free end of the journal can be made in a particularly advantageous manner, whereby the displaced by the notching material is moved and forms the projection. Of course, in each case instead of a projection at a free end in each case a projection at each free end of the bearing journal can be provided, or it can also be provided in each case a plurality of projections on one or both free ends of the journal.

Further advantages, features and features of the invention will become apparent from the following description of an advantageous embodiment of the invention with reference to the drawing. Show it:

1 is a bearing pin with plugged bearing bush of the household appliance according to the invention in a perspective front view,

2 is a plan view of a bearing angle with bearing pin and mounted bushing,

Fig. 3 is a perspective plan view of the arrangement of Fig. 2, and Fig. 4 is a cross-sectional view through the bearing bush.

1 to 3, an advantageous embodiment of the hinge of the inventive household appliance is shown, wherein the household appliance itself for the sake of clarity is not shown in the drawing.

The hinge comprises according to a bearing angle 10, which at one end 12 via through holes 11 on the household appliance or on its body to install, preferably to screw on is. At its other end 14, the bearing angle 10 continues in a bearing journal 20, which has a first free end 22 and a second free end 26 facing away from the first free end 22. As shown in Fig. 1 and common in a conventional installation of a household appliance, shows the first free end 22 of the journal upwards and the second free end 26 down. The

Direction of extension from the first free end 22 to the second free end 26 defines a pivot axis about which a hinged to the bearing bracket 10 and its bearing pin 20 door is pivotally mounted on the body of the household appliance.

The bearing bracket 10 describes from its end 12 to be fastened to the body to its other end 14 a curve or arc of more than 180 °, preferably of more than 210 ° (see Fig. 2) to the largest possible opening angle Door to allow.

The bearing angle 10 with the integrally formed thereto journal 20 is preferably stamped from a sheet metal blank such as a flat steel and bent into the appropriate shape. The thickness of the bearing bracket 10 and the journal 20 is preferably 3 to 7 mm, in particular, a thickness of 5 ± 1 mm is preferred.

The bearing pin 20 has - at least at its free ends 22 and 26 - preferably a rectangular cross-section. However, the cross section may also be square or have the shape of another polygon. At its upper, free end 22, the bearing pin 20 has a projection 24 which projects from the free end 22. The projection 24 does not project beyond the upper, free end 22 of the pivot pin 20 in the direction of the pivot axis, but rather perpendicularly away from the larger side of the rectangular cross section. On the one hand, such a projection 24 can be produced by, for example, punching or indenting a notch or recess in the first free end 22 from the end face of the first free end 22 with a tool, such as a grain, in which case this is achieved by hammering the notch 23 displaced material forms the projection 24. Alternatively, a notch may also be introduced from the long side of the rectangular cross-section (in FIG. 1 from the front) and the projection 24 formed by the material displaced by the notch. As a further alternative, it is conceivable to make the bearing pin during punching so that at its first free end 22 a corresponding, extending in the pivoting direction, section remains, which is then subsequently bent by 90 °. It should be noted here that the projections 24, 28 are shown in FIGS. 2 and 3 only schematically as spherical or hemispherical, while they are indicated in Fig. 1 with triangular cross-section. Similarly, the depressions or notches 23, 27 in FIGS. 1 and 3 are shown as having a triangular shape. However, the exact design is not essential for reasons explained later.

In the advantageous embodiment shown in the figures, there is also at the other, shown below, the second free end 26, a projection 28 and a corresponding recess 27. The type of design and manufacture of the recess 27 and the projection 28 correspond in an advantageous manner those of the recess 23 and the projection 24th

On the lower, second free end 26 of the journal 20, a bearing bush 30 is attached. The bushing 30 serves to be inserted into a corresponding bearing sleeve of the door of the household appliance, and it therefore acts as a pivot bearing. Consequently, the bearing bush 30 is circular in shape or at least substantially circular in shape on its outside. The bushing 30 is formed as a substantially cylindrical body, which is penetrated in the axial direction of a receptacle 32 which is substantially complementary to the cross-section of the free ends 22, 26 of the journal 20, so that the bearing bush 30 without play on the respective free end of the journal 20 is seated. The receptacle 32 is arranged eccentrically in the bearing bush 30, as shown in particular in FIGS. 1 and 2 can be seen. Immediately following the receptacle 32, the bearing bush 30 is axially penetrated in its interior by a feedthrough channel 34 for an electrical cable, wherein the feedthrough channel 34 and the receptacle 32 without an intermediate wall as a single axial opening of the bearing sleeve 30 are formed.

In Fig. 1 - only to illustrate the embodiment of the bearing bush 30 - whose front part folded away to the left, so that both the axially extending feedthrough channel 34 and the axially extending receptacle 32 is easy to see. A preferred example of the configuration of the bearing bush 30 is shown in the cross-sectional view of FIG. 4. The passage channel 34 is connected without intermediate wall with the receptacle 32, thus forms with her a common axial opening. The feedthrough channel 34 has the same cross-section over its axial extent. This however, it does not necessarily have to be that way, but the cross-section may possibly also deviate therefrom and vary over the axial extension.

Alternatively, it is also possible for the feedthrough channel 34 and the receptacle 32 to be connected to one another only in sections, and thus to have an interrupted or perforated intermediate wall between them. It is important, however, that no material is present in the bearing bush 30 at the point or those points at which when plugging the bushing 30 on the lower free end 26 of the journal 20 ago up the projection 28 projects into the feed channel 34, no material is present , which could hinder such a plugging. The feedthrough channel 34 thus serves as positioning aid into which the projection 28 (or 24) serving as positioning device engages and can therefore cooperate with it. The contours of the projections 24, 28 on the one hand and the feedthrough channel 34 on the other hand are at least partially adapted to each other, these elements need not be such that when engaging the projections 24, 28 in the feedthrough channel 34 an exact positive connection is made.

It is clear that the bearing bush 30 could not be plugged or pushed from below onto the second free end 26 of the bearing journal 20 in an angular position rotated by 180 ° about a vertical axis, because the projection 28 at this angular position of the bearing bush 30 at the boundary of the receptacle 32 abuts.

The illustrated and described bearing angle with bearing pin is intended for an articulation on the right of the household appliance. If the bearing angle is determined for a linkage on the left of the household appliance and thus to attach to the other end of the household appliance, its attachment is "upside down", so that the first free end 22 below and the second free end 24 is above. Even with such an arrangement, the previously described with respect to the projection 28 in a similar manner applies to the projection 24. Thus, the bearing bracket 10 described with the bearing pin 20 can be easily used both for hinging the door on the left home appliance as well as to the right. The bearing bush 30 is made of a plastic, preferably by injection molding. It is preferred to produce the bearing bush 30 made of POM (polyoxymethylene), which also allows good sliding in conjunction with metal. To the sliding sliding of the bearing bush 30 on the bearing pin 20th To facilitate and better lead, has the bearing bush 30 on the side facing away from the passage channel 34 side of the receptacle 32 with a - possibly curved - inclined surface 35 beheamende ramp 36, wherein the inclined surface 35 is arranged inclined so that they are its bottom approximately at the receptacle 32 connects and on its upper side further away from the receptacle 32.

From the graphic representation it can be seen that the bearing pin 20 is mirror-symmetrical with respect to a horizontal plane. Apart from the projections 24 and 28, the free ends 22 and 26 are also mirror-symmetrical with respect to a plane perpendicular to the plane of the drawing and with respect to a plane parallel to the plane of the drawing. However, in alternative embodiments this need not necessarily be so.

LIST OF REFERENCE NUMBERS

10 bearing angle

11 through hole

12 first end of the bearing angle 14 second end of the bearing angle

20 journals

22 first free end

23 deepening

24 projection 26 second free end

27 deepening

28 lead

30 bearing bush

32 receptacle 34 feedthrough channel

35 inclined surface

36 ramp

Claims

1. Household appliance, in particular refrigerator, with at least one hinge for supporting a door of the household appliance, wherein the hinge has a bearing journal (20) which has at least a first free end (22), and a bearing bush (30) which has a receptacle (30). 32) for a free end (22) of the trunnion (20) and a passage channel (34) for a cable and is designed so that it can be attached to the first free end (22) of the trunnion (20) during assembly, wherein the bearing journal (20) has a first positioning device which ensures that the bearing bush (30) can be plugged onto the first free end (22) of the bearing journal (20) only in a first angular position and not in a second angular position.

2. Household appliance according to claim 1, wherein the bearing pin (20) facing away from the first free end (22) second free end (26) and is provided with a second positioning device, which ensures that the bearing bush (30) only in the first Angle position and not in a second angular position on the second free end (26) of the journal (20) can be plugged.

3. Household appliance according to claim 1 or 2, wherein the first positioning means in the region of the first free end (22) of the bearing journal (20) and the second positioning means in the region of the second free

End (26) is arranged.

4. Household appliance according to one of the preceding claims, wherein the first and the second positioning device is able to cooperate with a positioning aid on the bearing bush (30).

5. Household appliance according to claim 4, wherein the first and the second positioning at least approximately contours matched with the positioning aid is available.

6. Household appliance according to one of claims 2 to 5, wherein the bearing pin (20) is part of a bearing bracket (10) which is symmetrical to a plane transverse to the direction of extension from the first free end (22) to the second free end (10). 26) runs.

7. Household appliance according to one of the preceding claims, wherein the bearing angle (10) or the bearing pin (20) is formed from a flat blank.

8. Household appliance according to one of the preceding claims, wherein the first angular position with respect to the second angular position is rotated by substantially 180 ° about an axis extending in the direction of extension from the first free end (22) to the second free end (26).

9. Household appliance according to one of the preceding claims, wherein the bearing bush (30) has an at least substantially circular cross section, wherein the receptacle (32) for the free end (22, 26) of the bearing pin (20) is arranged eccentrically.

10. Household appliance according to one of the preceding claims, wherein the receptacle (32) for the free end (22, 26) of the bearing journal (20) and the feedthrough channel (34) are connected to each other at least in sections.

11. Household appliance according to one of the preceding claims, wherein the bearing pin (20) is formed as a flat part which in the correspondingly shaped receptacle (32) in the bearing bush (30) can be inserted, wherein the passage channel (34) of the bearing bush (30). without intermediate wall with the receptacle (32) is connected.

12. Household appliance according to one of the preceding claims, wherein the receptacle (32) for the free end (22, 26) of the bearing journal (20) is formed in mirror symmetry in cross section.

13. Household appliance according to one of the preceding claims, wherein each positioning means of at least one at the respective free end (22, 26) of the bearing pin (20) located projection (24, 28) is formed, which is intended to be in the positioning of the Bearing bush (30) extend into it.

14. Household appliance according to claim 13, wherein the positioning bush (34) of the bearing bush (30) serves as a positioning aid.

15. Household appliance according to claim 14, wherein the projection (24, 28) has at least substantially the same volume as an adjacent recess (23, 27).

16. Household appliance according to claim 15, wherein the projection (24, 28) by displacement of material from the recess (23, 27) is formed.

17. Household appliance according to claim 15 or 16, wherein the recess (23, 27) is a notch.