EP2625359B1 - Device for transmitting electric power from a wall to a wing fastened to said wall in a hinged manner - Google Patents

Description

The invention relates to a device for transmitting electrical power from a wall to a hinged about a hinge axis hinged to this wall wings.

Bands that serve to hingedly connect a wing to a wall, have long been, for example from the DE 93 02 652 U1 known. They have proven themselves in various technical designs many times and are also used for doors for objects such as houses, shops or escape doors use.

Such doors increasingly include safety or comfort enhancing devices powered by electrical energy.

For power supply, these devices are connected via flexible cables to an external power source.

These cable connections significantly affect the visual appearance and can be trapped between the wing and the wall, which can damage or even destroy the cables.

From the DE 10 2004 017 341 A1 is a band with a built-in transformer for contactless energy transfer known. This band comprises a primary coil arranged in a frame band part and a secondary coil arranged in a leaf band part. The magnetic coupling of the secondary coil to the primary coil, which are spaced apart in the direction of the hinge axis, serves a coil passing through both iron core, which is formed by a hinge pin.

Although, in principle, the contactless energy transfer from a fixed frame in a pivotally arranged on the frame wings to avoid the above disadvantages desirable, but experiments have shown that with the from the DE 10 2004 017 341 A1 Only very small electrical power can be transmitted from the primary to the secondary side.

A device for inductive transmission of electrical energy between a body and a vehicle door is known from US 5,156,074 JP 201 057744 known.

The invention has for its object to provide a device for transmitting electrical energy from a wall to a hinge axis hingedly mounted on this wall wings to accomplish a contactless transmission of electrical energy at least with a power as they are for charging an electrical Energy storage and / or for an electrical consumer is needed.

This object is achieved by the reproduced in claim 1 device.

The device according to the invention for transmitting electrical power from a fixed wall into a hinge hinged to the wall about a hinge axis therefore has a wall-mountable wall portion, a wing portion attachable to the wing, a primary coil provided on the wall portion, and one on the wing portion provided secondary coil on.

The primary coil comprises a primary coil winding and a primary coil housing having ferrimagnetic or ferromagnetic properties, for example containing a ferrimagnetic or ferromagnetic material. The primary coil housing is open at the end face facing the wing part and covers the coil winding at least almost completely on the opposite end side. The secondary coil comprises a secondary coil winding and a secondary coil housing having ferrimagnetic or ferromagnetic properties, for example comprising a ferrimagnetic or a ferromagnetic material. The secondary coil housing is open on the end facing the wall part and covers the coil winding on the opposite end face at least almost completely.

In order to ensure a good inductive coupling between the primary coil and the secondary coil, according to the invention at least one of the primary and secondary coils is spring-loaded against the respective other coil in the direction of the hinge axis displaceable in the wall or the wing part. Due to this measure it is ensured that the mutually facing end faces of the two coils are always in direct contact. This is of particular importance, since it has surprisingly been found that even with an existing bolt with sleeve already small gaps lead to a significant deterioration of the power transmission from the primary to the secondary coil.

Surprisingly, it has been shown that with this arrangement, a particularly effective inductive coupling of the secondary coil is achieved to the primary coil, so that compared to that from the DE 10 2004 017 341 A1 previously known arrangement considerably higher electrical power from the primary to the secondary coil can be transmitted at approximately the same coil dimensions.

To improve the coupling and also to facilitate winding of the coil, a primary coil housing and / or a secondary housing is particularly preferred, which has an inner, cylindrical circumferential surface, around which the primary coil winding or the secondary coil winding is wound.

In addition, it is again to improve the inductive coupling of the secondary coil to the primary coil - and also to make the coils resistant to external influences - of particular advantage, when the primary coil housing and / or the secondary coil housing comprises an outer lateral surface which is concentric with the inner circumferential surface is arranged. The coil windings are then protected surrounded by the inner and outer lateral surfaces and the closed end faces.

The primary coil housing and / or the secondary coil housing are preferably each formed in one piece from a ferrimagnetic and / or ferromagnetic particles containing plastic. Such a housing is characterized in particular by its magnetic flux conducting and by its inductive coupling of the coil improving properties. In addition, such a housing can readily assume sliding bearing tasks, if it is a bearing material in the plastic used.

The ferrimagnetic and / or ferromagnetic particles may consist of different materials. The choice of materials depends essentially on the frequency of the primary voltage. If this is in the range of about 50 kHz, then the use of manganese-zinc-ferrite material has led to good coupling results.

In addition, the coil housings may include on their outsides electrically conductive shields. This reduces the risk of external electromagnetic fields adversely affecting transmission. It is also prevented that electromagnetic waves are radiated by the inductive transmission and, for example, can disturb radio-operated devices in the vicinity of the device.

The shield may comprise electrically conductive layers or layers with such properties provided on the outer surfaces of the coil housings. By "layer" is here to be understood a material layer firmly connected to the respective outer surface, wherein "layer" means a self-supporting configuration or position, for example in the form of a shell.

It has proven particularly advantageous to use an alternating voltage of 20 kHz to 150 kHz as primary voltage. The primary coil winding and the secondary coil winding therefore preferably consist of high-frequency stranded wire.

The device according to the invention can be designed such that it serves exclusively for the transmission of electrical energy from a wall to a wing hinged about a hinge axis on this wall and not for the transmission of mechanical forces. The actual attachment of the wing to the wall takes place in such a case exclusively with the help of at least two other conventional bands. Viewed from the inner circumferential surface radially inwardly, the primary and the secondary coil body can then be solid.

However, an embodiment of the device according to the invention is particularly preferred in which the primary and secondary coil housings each include an opening extending approximately concentrically with the inner lateral surface in the direction of the hinge axis, through which a hinge bolt defining the hinge axis can be inserted. The device can then serve in addition to the power transmission and the transmission of mechanical forces between the wing and wall and thus at the same time take over the conventional band function.

In order for the bolt to continue to act to enhance inductive coupling as well as a common core of a transformer formed by the primary and secondary coils, it has a sleeve along the length covered by the primary and secondary coils with ferrimagnetic or ferromagnetic properties, for example containing a manganese-zinc-ferrite material on. Their length is preferably as closely as possible to the length covered by the primary and secondary coils, adapted to avoid losses.

The sleeve can be pushed onto the bolt. However, it is preferred to provide the sleeve in a concentric with the longitudinal axis of the bolt recess. It is then - particularly preferably - made of a plastic material with ferrimagnetic or ferromagnetic properties having particles, as the unit of bolt with sleeve is particularly easy to produce.

Are - as also preferred - the primary coil and the secondary coil of identical design, so can the cost of manufacturing and storage of the coils can be reduced.

Fig. 1

eine Explosionsdarstellung eines Ausführungsbeispiels einer erfindungsgemäßen Vorrichtung, der zugleich die Funktion eines herkömmlichen Bandes zukommt;

Fig. 2

diese Vorrichtung in einer teilweise aufgerissenen Darstellung der Wand- und Flügelteile in einer perspektivischen Darstellung, mit schematisch angedeuteter Primär- und Sekundärelektronik;

Fig. 3

das obere Wandteil und das Flügelteil, teilweise aufgerissen, in perspektivischer Einzeldarstellung;

Fig. 4

eine Ansicht der offenen Stirnseite eines Spulenkörpers;

Fig. 5

den Ausschnitt V in Fig. 2 im Schnitt durch die Scharnierachse;

Fig. 6

eine Explosionsdarstellung einer weiteren Ausführungsform der erfindungsgemäßen Vorrichtung, die nur der Übertragung von elektrischer Leistung von einer Wand in einen Flügel dient.

The invention will now be further illustrated with reference to the accompanying drawings. Show it:

Fig. 1

an exploded view of an embodiment of a device according to the invention, which also plays the function of a conventional band;

Fig. 2

this device in a partially torn view of the wall and wing parts in a perspective view, with schematically indicated primary and secondary electronics;

Fig. 3

the upper wall part and the wing part, partially torn, in perspective detail view;

Fig. 4

a view of the open end of a bobbin;

Fig. 5

the section V in Fig. 2 in section through the hinge axis;

Fig. 6

an exploded view of another embodiment of the device according to the invention, which only serves to transfer electrical power from a wall into a wing.

The in the FIGS. 1 to 5 as a whole with 100 designated device is designed as a so-called three-piece tape. It comprises an upper wall part 1 and a lower wall part 2. Both parts 1, 2 are spaced apart in the direction of a hinge axis S.

Between the upper and the lower wall part 1, 2, a wing part 3 is arranged.

The upper and lower wall parts 1, 2 each comprise a wall hinge part 4, 4 'and a wall fastening part 5, 5'. Accordingly, the wing hinge part comprises a wing hinge part 6 and a wing attachment part 7.

The hinge axis S is defined by a the wall hinge parts 4, 4 'and the wing hinge part 6 in bolt receivers 8, 8' and 9 passing through bolt 10. The bearing of the bolt 10 in the bolt receptacles 8, 8 ', 9 serve bushings 11, 11' and 12 of a plastic material, for example based on POM with Gleitlagermodifizierenden additives, which has been proven for use as a bearing bush in tapes. The bushings 11, 11 ', 12 have parallel to the hinge axis S extending, radial projections 13. The diameter of the radial projections 13 interconnecting circle is adapted to the inner diameter of the bolt receptacles 8, 8 ', 9 such that the bearing bushes 11, 11', 12 engage clearance in the respective bolt receptacle. At the upwardly directed end of the bearing bush of the lower wall portion 2, at the upper end of the bearing bush 11 of the upper wall portion 1 and at the lower end of the bearing bush 12 of the wing portion 3 annular end portions 14 are formed, which protrude radially slightly beyond the radial projections 13 , They rest in a correspondingly dimensioned radial extension 15 of the respective bolt receptacle 8, 8 ', 9 and thus close the bolt receptacles to the outside against the ingress of contaminants. In addition, the end portions 14 of the bushings 11 'of the lower wall part 2 and the Bearing bush 12 of the wing part 3 supports, via which acting in the direction of the hinge axis forces are introduced from the wing part 3 in the lower wall part 2. Furthermore, the bearing bushes 11, 11 ', 12 inner bores 16, whose diameter is adapted to the diameter of the bolt 10 so that it is rotatable, but at least substantially free of play of the bushings 11, 11', 12 is added.

The lower end of the lower wall part 2 forms a bearing plate 17 whose dimensions correspond to the end portions 14 and which is inserted into a radial extension 15 of the lower wall portion.

The length of the bearing bush 11 'corresponds almost to the length of the bolt receptacle 8' of the lower wall part 2, whereas the bushings 11, 12 are formed only about half as long as the bolt receptacle 8 of the upper wall portion 1 and the pin receptacle 9 of the wing portion 3. In the remaining space of the bolt receptacles 8, 9, a primary coil 19 and a secondary coil 20 are used. Between the primary coil 19 and the bearing bush 11 and between the secondary coil 20 and the bearing bush 12 is in each case a compression spring 18, 18 '. These compression springs ensure that the two primary and secondary coils 19, 20 lie with their end faces 21, 22 against each other, as in particular in Fig. 2 . 5 and 6 is recognizable.

The primary coil 19 and the secondary coil 20 are identical, but mounted with respect to the hinge axis S in the reverse direction. They include a primary coil housing 23 and a secondary coil housing 24 made of plastic material in which manganese-zinc-ferrite particles are embedded. The bobbins 23, 24 have at their mutually facing end sides in each case a closed outer end wall 25, 26, which is in each case interrupted by a central through hole 48, 48 'for the passage of the hinge pin. Of the end walls 25, 26 extend concentrically to the hinge axis S in the opposite direction in each case an inner shell wall 27, 28 and in each case an outer jacket wall 29, 30. At the end walls 25, 26 opposite end faces 21, 22, the bobbin 23, 24 are open ,

Inside the bobbins 24, 25 are the primary and secondary coil windings 31, 32, which are wound around the inner jacket walls 27, 28. For the coil windings suitable for the respective primary and secondary voltages and the respective primary and secondary currents and frequencies suitable strand, such as high-frequency strand use.

The coil housings 23, 24 are surrounded by an electrically conductive shield 33, which reduces the emission and penetration of interference radiation.

In particular Fig. 1 and 3 can be removed, 3 channels 34, 35 are provided on the upper wall portion 1 and on the wing portion, which extend from the hinge pin receivers 8, 9 in the frame attachment part 5 and the wing attachment part 7. They serve to pass through connection lines 36, 37 of the primary and / or secondary coil 19, 20.

In Fig. 2 a device 100 according to the invention is shown with a primary electronics 38 and a secondary electronics 39 to a system for transmitting electrical energy from a wall to a fixed to this wall wings. The primary electronics 38 of this system 200 is connected to its input 40 to a mains voltage 41. The primary electronics convert the mains voltage into a maximum voltage of 48 V and a frequency between 20 and 1 mHz, which is provided at the output 42. The latter is connected to the primary coil 19.

Since the primary and secondary coils 19, 20 are identical, is located at the input 43 of the secondary electronics 39, which is connected to the secondary coil 20, about the same voltage as at the output 42 at. In the secondary electronics 39, this voltage is converted into one which is suitable for operating an electrical consumer or electric energy store 45 connected to the output 44 of the secondary electronics 39.

In order to improve the inductive coupling between primary coil 19 and secondary coil 20, the bolt 10 has a concentric with the hinge axis S extending recess 46. In this is a sleeve 47 from a Plastic material in which particles of a manganese-zinc-ferrite material are incorporated. The length of the sleeve 47 is dimensioned so that it coincides at least almost exactly with the length of the coil consisting of primary and secondary coil 19, 20 coil package.

The system according to the invention was tested with the following test setup: As primary and secondary coils 19, 20, coils with a coil winding of 30 turns of a strand of 0.8 mm diameter were used. The primary voltage provided with the primary electronics was effectively about 12 V with a primary frequency of 50 kHz. The secondary electronics were designed to provide a DC voltage of about 12V to 24V at the output. It was possible to provide a power of more than 10 W on the secondary side.

Another embodiment of a device 300 according to the invention is shown in FIG Fig. 6 shown. For functionally identical components, the same reference numerals have been used as in the apparatus 100. To avoid repetition, reference is made to the above description.

The device 300 is used exclusively for the transmission of electrical power from a wall part 1 in a wing part 3. It is therefore always in addition to conventional tapes in a wall / wing assembly use.

In this device 300 thus lacks the bolt 10. Accordingly, the bushings 11, 12 are not provided with a bore. They are so adapted to the receptacles 8, 9 that they can be pressed into them to produce a frictional connection, so that the compression springs 18, 18 'can be supported on the facing end faces.

The primary and secondary coils 19, 20 accordingly have coil housings which, in contrast to the coil bodies in the device 100, have no central passage bore for the passage of the bolt, but instead are designed as a solid body.

If the device according to the invention is attached to a wall / door arrangement which comprises conventional strips, this is done so that the hinge parts 4, 6 do not abut each other with their end faces facing one another, but a gap remains which of the primary pressed against one another by spring force - And secondary coils is bridged. Since these are also transversely to the hinge axis S displaced in the absence of an enforcing bolt, an adjustment of the wing in the wall section can be made in all three spatial directions, without the need for a special adaptation of the device for this purpose.

LIST OF REFERENCE NUMBERS

100, 300

contraption

200

system

1

upper wall part

2

lower wall part

3

wing part

4, 4 '

Wall hinge part

5, 5 '

Wall mounting part

6

Wing hinge part

7

Wing attachment part

8, 8 '

bolt Hole

9

bolt Hole

10

bolt

11, 11 '

bearing bush

12

bearing bush

13

projections

14

end regions

15

extension

16

drilling

17

bearing disk

18, 18 '

compression spring

19

primary coil

20

secondary coil

21

front

22

front

23

Primary coil housing

24

Secondary coil housing

25

outer end wall

26

outer end wall

27

inner jacket wall

28

inner jacket wall

29

outer jacket wall

30

outer jacket wall

31

Primary coil winding

32

Secondary coil winding

33

shielding

34

channel

35

channel

36

connecting cable

37

connecting cable

38

primary electronics

39

secondary electronics

40

entrance

41

mains voltage

42

output

43

entrance

44

output

45

Consumer / energy storage

46

recess

47

shell

48, 48 '

Through holes

Claims (14)

1. Device (100, 300) for transmitting electrical power from a fixed wall to a wing that is hingedly attached to the wall about a hinge axis, comprising a wall part (1) that can be fastened to the wall, comprising a wing part (3) that can be fastened to the wing, comprising a primary coil (19) provided on the wall part (1), and comprising a secondary coil (20) provided on the wing part (3), the primary coil (19) and the secondary coil (20) being arranged such that the end faces thereof face one other, the primary coil (19) comprising a primary coil winding (31) and a coil housing (29) that has ferromagnetic or ferrimagnetic properties and is open at the end face facing the wing part (3), and the coil winding (31) on the opposite end face being at least almost completely covered, and the secondary coil (20) comprising a secondary coil winding (32) and a secondary coil housing (30) that has ferrimagnetic or ferromagnetic properties, is open at the end face facing the wall part, and at least almost completely covers the coil winding (32) on the opposite end face, characterized in that at least one of the primary and secondary coils (19, 20) is mounted in a spring-loaded manner in the wall part or wing part, respectively, so as to be movable towards the relevant other coil (20, 19) in the direction of the hinge axis.
2. Device according to claim 1, characterized in that the primary coil housing and/or the secondary coil housing has an inner lateral wall around which the relevant coil winding is wound.
3. Device according to claim 2, characterized in that the inner lateral wall is cylindrical.
4. Device according to either claim 2 or claim 3, characterized in that the primary coil housing and/or the secondary coil housing comprises an outer lateral wall that is arranged concentrically with respect to the inner lateral wall.
5. Device according to any of claims 1 to 4, characterized in that the primary coil housing and/or the secondary coil housing are each integrally formed from a plastics material containing ferrimagnetic and/or ferromagnetic particles.
6. Device according to claim 5, characterized in that the particles comprise manganese-zinc ferrite material.
7. Device according to any of claims 1 to 6, characterized in that the coil housing comprises an electrically conductive shield.
8. Device according to claim 7, characterized in that the shield comprises an electrically conductive layer or coat provided on the outer surface of the coil housing.
9. Device according to any of claims 1 to 8, characterized in that the primary coil winding and the secondary coil winding consist of litz wires that are suitable for the primary and secondary voltages and the primary and secondary current intensities and frequencies.
10. Device according to any of claims 2 to 4, characterized in that the primary and secondary coil elements each comprise an opening extending approximately concentrically with respect to the inner lateral wall in the direction of the hinge axis, through which opening a bolt can be inserted that defines the hinge axis.
11. Device according to claim 10, characterized in that the bolt comprises a sleeve having ferrimagnetic or ferromagnetic properties over the length covered by the primary and the secondary coil.
12. Device according to claim 11, characterized in that the sleeve is provided in a recess that extends concentrically with respect to the longitudinal axis of the bolt.
13. Device according to either claim 11 or claim 12, characterized in that the sleeve is made from a plastics material comprising ferrite particles.
14. Device according to claim 13, characterized in that the ferrite particles contain manganese-zinc ferrite material.

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