EP2594714A1 - Device for contactless transfer of electrical energy between a wall and a leaf fixed to this wall - Google Patents

Abstract

The device (100) has primary power coils (1, 10) fastened to a wall, and secondary power coils (2, 9) fastened to a leaf of a door. Hinge bolts (3, 103) are formed as a multi-part and as magnetic flow conductive bodies between the primary and secondary coils. The bolts include flow elements (4, 4', 104, 104') with front sides and support pieces (8, 8', 108, 108') with counter front sides. The front sides of the flow elements are interlocked against the counter front sides of the support pieces. A slide element penetrates the flow elements and is connected with the support pieces.

Description

The invention relates to a device for the contactless transmission of electrical energy between a wall and a hinge hingedly mounted on this wall about a hinge axis in which a fixed to the wall primary coil and a secondary wing attached to the wing are provided by a hinge pin are in inductive active connection.

In particular, wings of doors for objects such as houses, shops or production halls increasingly have the safety or comfort improving facilities, the current state of operation and their operation is monitored or operated by located outside the door monitoring or actuation devices and which operating state changes or possibly send signals received from sensors to the monitoring or actuation devices.

As an example, a warning system installed in the building may be mentioned, which communicates with devices provided on the door, for example for opening, breakthrough, closure, sabotage or engine lock monitoring.

To transmit corresponding signals and electrical power between the monitoring device and the devices located on the door, many types of cables are used in the art that are flexibly routed between the sash and the frame and are often surrounded by a flexible metal hose for protection.

These cable transitions affect the visual appearance significantly and can be trapped when closing the wing, which can lead to damage or even the destruction of the cable. In addition, the cable transitions are weak points with regard to possible manipulations, which is why so-called Z-wiring of sensors or contacts is also realized in the cable transition for sabotage protection.

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 also forms the hinge pin.

Although in principle the contactless energy transfer from a fixed frame into a pivotally arranged in the frame wings to avoid the above-mentioned disadvantages is desirable. Experiments have shown, however, that with the of the generic DE 10 2004 017 341 A1 known band only very small electrical power from the primary to the secondary side can be transmitted because the power loss during transmission is very high.

The invention has for its object to provide a generic device with a respect to the inductive operative connection of the primary and secondary coils improved hinge pin.

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

The hinge pin of the device according to the invention is designed in several parts. It comprises at least one flow element designed as a prefabricated component. By this is meant the component which alone or predominantly conducts the magnetic flux between the primary coil and the secondary coil. This flow element is prefabricated. By this is meant that it does not first cast, sprayed or otherwise formed on another, existing component of the hinge pin. Rather, it is at least almost in its final form prior to assembly with at least one other part of the hinge pin.

The hinge pin according to the invention further comprises at least one bearing piece, which alone or predominantly measures the introduction of mechanical forces in the hinge pin or the exercise of mechanical forces by the hinge pin, so ultimately the transmission of mechanical forces between the wing and the wall.

Due to the multi-part structure, the flow element and the bearing piece can be optimized for various properties, such as low magnetic resistance in the case of the flow element or high mechanical strength in the case of the bearing piece and placed where these properties are particularly required. The prefabricated flow element can be made of a material which is particularly suitable for the particular application of the device. If, for example, the device is intended to transmit an alternating voltage of approximately 50 Hz, then the flux element can consist of or include, for example, dynamo plate. If the AC voltage has a higher frequency, for example in the kilohertz range, then the flux element can consist of or include, for example, amorphous or nanocrystalline bands or also of ferrites.

Since the production of the flow element is done separately from the other parts of the hinge pin, it is particularly simple and inexpensive. Also optimized for different purposes flow elements together with the other components of the hinge pin are kept in a kind of modular system.

The flow element comprises end faces, of which at least one is braced against a counter-end face of a bearing piece. As a result, the bearing piece and the flow element are reliably fixed to each other.

The flow element is preferably rotationally symmetrical. As a result, it can have the greatest possible cross-sectional area in favor of a particularly low magnetic resistance. In addition, disturbing, axially on the surface of the hinge pin extending edges of the flow element, as are conceivable, for example, in a flow element formed from half-shells excluded.

In order to effect the bracing, in a first, preferred variant of the hinge pin, at least one tension element passing through the flow element in a central bore is provided, which is connected to at least one bearing piece. In this case, the diameter of the tension element and the bore of the flow element are kept as small as possible, so that the flow element has the maximum possible cross-sectional area for minimizing the magnetic resistance. Therefore, preferably a material is used for the tension element, which has a sufficient tensile strength to achieve the required for the particular application strength of the strain.

The tension element is preferably screwed to the at least one bearing piece, since this connection is easy to implement in terms of machine technology and can be released. In addition, a desired tensile stress can be achieved by fixing the torque with which the screw connection takes place.

The device according to the invention may also comprise two coil pairs spaced apart from each other, each consisting of a primary coil and a secondary coil. This, for example, when a pair of coils of the transmission of electrical power, the other pair of coils to serve the transmission of electrical signals between the band and wing. The hinge pin then preferably comprises two mutually separated by a central piece, which facing away from each other end faces includes spaced-apart flow elements. The flow elements can be adapted to the power, frequency, signal shape etc. to be transmitted by means of the respective coil pair by means of different dimensioning and choice of material.

For example, to reduce the transmission of shock or vibration from one flow element to the other flow element, the center piece may be formed to have damping properties. For this purpose, it may be formed, for example, from a material having damping properties, for example a suitable plastic material.

The middle piece preferably has a through-hole penetrated by the pulling element which is screwed to bearing pieces, the end pieces, i. form the two end portions of the hinge pin, which essentially plays the bearing function and which serve to transmit mechanical forces.

In a second embodiment of the device according to the invention, a threaded extension or a threaded bore is provided on the at least one flow element and on the facing counter-end side of a bearing piece a complementary threaded bore or a threaded extension, so that the at least one flow element can be screwed to the bearing piece. This embodiment differs from the first embodiment described above, thus, in that no separate tension element is present, but the tension of the front and opposite ends against each other, is produced by a screwing of the thread extension in the threaded bore. The strength of the tension or the value of the pressure force with which the front and opposite ends face each other can in turn be determined by the specification of the torque with which the screwing takes place.

In the case that the hinge pin is to be suitable for a device with two coil pairs, it in turn comprises two flow elements spaced from each other by a central piece. The middle piece has facing away from each other end faces, wherein at the opposite end faces to the threaded extensions or threaded holes of the flow elements complementary threaded holes or threaded extensions are provided so that the flow elements are screwed to the center piece. The center piece may in turn be designed such that it has damping properties.

In both embodiments, it is advantageous if the at least one bearing piece has a centering surface and the at least one flow element has a counter-centering surface, so that the bearing piece and flow element are reliably positioned within permissible tolerances with respect to one another without the need for additional measures beyond merely joining together.

In the event that the hinge pin comprises two flow elements spaced apart from one another by a middle piece, the middle piece preferably also has counter-centering surfaces for a respective centering surface of a flow element.

In order to avoid that the inductive coupling of primary and secondary coil is affected by unnecessary leakage losses, the bearing pieces are particularly preferably made of a material with low permeability. Also, due to this measure, the susceptibility to external magnetic fields, which may act on the bearing pieces, reduced.

Preferably, if present, the center piece is made of a low permeability material to reduce unwanted magnetic coupling of the two flux elements.

The invention also relates to a hinge pin per se of a device of the type described above. The materials used for the individual parts are preferably not components composed of different materials, such as a metal core overmoulded with a high-permeability material. But each part is preferably made of a single commercially available material or a single commercial material combination.

Fig. 1

- schematisch - eine erfindungsgemäße Vorrichtung, teilweise im Längsschnitt;

Fig. 2

eine perspektivische Darstellung eines ersten Ausführungsbeispiels eines Bandbolzens einer erfindungsgemäßen Vorrichtung;

Fig. 3

eine Ansicht wie in Fig. 2, jedoch als Explosionsdarstellung;

Fig. 4

eine Seitenansicht eines Bandbolzens wie in Fig. 2;

Fig. 5

eine Stirnansicht eines Bandbolzens wie in Fig. 2;

Fig. 6

eine Schnittdarstellung eines Bandbolzens wie in Fig. 4;

Fig. 7

eine vergrößerte Darstellung eines Details aus Fig. 6;

Fig. 8

eine perspektivische Darstellung eines zweiten Ausführungsbeispiels eines Bandbolzens einer erfindungsgemäßen Vorrichtung;

Fig. 9

eine Ansicht wie in Fig. 8, jedoch als Explosionsdarstellung;

Fig. 10

eine Seitenansicht eines Bandbolzens wie in Fig. 8;

Fig. 11

eine Stirnansicht eines Bandbolzens wie in Fig. 10;

Fig. 12

eine Schnittdarstellung eines Bandbolzens wie in Fig. 10 sowie

Fig. 13

eine vergrößerte Darstellung eines Details der Fig. 12.

The invention will now be explained in more detail with reference to embodiments shown in the drawings. Show it:

Fig. 1

- schematically - a device according to the invention, partly in longitudinal section;

Fig. 2

a perspective view of a first embodiment of a hinge pin of a device according to the invention;

Fig. 3

a view like in Fig. 2 , but as an exploded view;

Fig. 4

a side view of a hinge pin as in Fig. 2 ;

Fig. 5

an end view of a hinge pin as in Fig. 2 ;

Fig. 6

a sectional view of a hinge pin as in Fig. 4 ;

Fig. 7

an enlarged view of a detail Fig. 6 ;

Fig. 8

a perspective view of a second embodiment of a hinge pin of a device according to the invention;

Fig. 9

a view like in Fig. 8 , but as an exploded view;

Fig. 10

a side view of a hinge pin as in Fig. 8 ;

Fig. 11

an end view of a hinge pin as in Fig. 10 ;

Fig. 12

a sectional view of a hinge pin as in Fig. 10 such as

Fig. 13

an enlarged view of a detail of Fig. 12 ,

In the Fig. 1 schematically illustrated and denoted as 100 as a whole comprises two pairs of primary and secondary coils, namely a primary power coil 1 and a secondary power coil 2, as well as a signal transmission coil 9 and a signal transmission coil 10 located therewith in inductive coupling. All coils are penetrated by one and the same hinge pin 3, 103. The hinge pin is - in contrast to the rest of the device - not shown in longitudinal section.

The hinge pin 3, 103 connects hinge parts 14, 15, 16 pivotally about a hinge axis S. The device 100 is constructed similar to a three-part belt. It may be arranged in addition to the load of the wing receiving bands of known design between the wing and frame or instead of such a band. The device 100 can therefore also absorb mechanical forces, in particular forces to be transmitted between the wall and the wing.

The hinge pin 3, 103 is formed in several parts. It comprises two spaced-apart flow elements 4, 4 '; 104, 104 ', which are spaced from each other by a central piece 7, 107. The flow elements 4, 4 '; 104, 104 'are dimensioned to match that of the coils 1, 2; 9, 10 enclosed space substantially completely fill, but not protrude from them.

Furthermore, the hinge pin comprises the two flow elements 4, 4 '; 104, 104 'outwardly extending bearing pieces 8, 8'; 108, 108 ', which serve for the storage of the hinge pin in the band parts 14, 16 and the transmission of mechanical forces. The storage of the hinge pin in the band part 15 serves the middle piece 7, 107th

The hinge pin 3, 103 is - as below with reference to the Fig. 2 to 13 is explained in more detail - constructed entirely of individual parts. The flow elements 4, 4 '; 104, 104 'are made of soft magnetic material, such as ferrite. The center piece 7, 107 is for magnetic decoupling of the flow elements 4, 4 '; 104, 104 ', as well as the bearing pieces 8, 8'; 108, 108 'made of a material having a low permeability.

In order to give the hinge pin 3, 103 damping properties which limit the transmission of, for example, vibrations between the flux elements 4, 4 '; 104 104 ', at least reduced, the center piece 7, 107 made of a damping material, for example made of plastic. For fixing in the direction of the hinge axis S, it has a constriction 13, in which engages a stud bolt, not shown in the drawing.

Based on Fig. 2 to 7 Now, a first preferred embodiment of the hinge pin 3 will be explained in more detail. This embodiment comprises a tension element 6, which is rod-shaped and provided at both ends with a thread 6 '. The tension member 6 may also be formed as a continuous threaded rod. The threads 6, 6 'engage, in particular Fig. 6 shows, in this complementary internal thread 6 "of the bearing pieces 8, 8 'a .The tension element 6 is thus bolted to the bearing pieces 8, 8' with it on the bearing pieces 8, 8 'tensile forces exerted so that they with counter-end faces 17, 17 'at end faces 18, 18' of the flow elements 4, 4 'rest (s. Fig. 3 ), So the end faces 18, 18 'of the flow element 4, 4' against counter-end faces 17, 17 'of the bearing pieces 8, 8' are braced.

The tension element 6 additionally causes the end faces 19, 19 'respectively provided at the other end of the flow elements 4, 4' to be braced against counter-end faces 20, 20 'of the center piece 7.

The amount of tension caused by the tie rod can be influenced by the torque with which the bearing pieces 8, 8 'are tightened. To attach a suitable turning tool, they comprise key surfaces 8a, 8a '.

The internal threads 6 "can be designed to be self-tapping, so that only cylinder bores must be provided in the bearing pieces 8, 8 '.The tension element 6 is formed from a material suitable for absorbing high tensile stresses, such as an iron alloy Fig. 5 shows, thereby the diameter of the tension member may be relatively small, for example, less than half the diameter of the hinge pin. In the illustrated embodiment, the diameter of the tension member is slightly larger than one third of the diameter of the hinge pin 3. By the relatively small Diameter, the flow elements 4, 4 'occupy a relatively large cross-sectional area. This results in a particularly low magnetic resistance and the highest possible inherent stability of the flow elements 4, 4 '.

If the bearing pieces 8, 8 'screwed so tightly on the tension member 6 that it is not stretched due to the tension to the limit of its particular elastic deformability, so the hinge pin 3, in particular paired with the damping design of the middle piece 7, a total a shock-absorbing effect. Because the middle hinge part 15, which is regularly attached to a wing, can move in the scope of deformation relative to the band parts 14, 16 which are regularly attached to the wall, under the action of external forces.

In particular 6 and 7 show, the flow elements 4, 4 'at its two end faces 18, 19; 18 ', 19' provided with approximately frusto-conical chamfers 11, which cooperate with self-centering on the center piece 7 and on the bearing pieces 8, 8 'provided complementary chamfers 12 and thus centering and Gegenzentrierflächen for the bearing pieces 8, 8', the flow elements. 4 , 4 'and the middle piece 7 form.

The hinge pin 3 is easy to assemble in the manufacture and also for the processor who inserts it into the device 100. There are no ferritic half-shells and no often critical bonds. The hinge pin is simple and has an automatic tolerance compensation in the assembly length by the elastic properties of the center piece 7 and the tension element 6. It is always centered by the self-centering components and therefore easily mounted on the belt or the device. It is very easy to adapt to other dimensional and coil situations (modular system). Due to the low magnetic resistance of the flux elements 4, 4 ', the inductive coupling is optimized. Due to the shock-absorbing effect of the middle piece 7, which may comprise a plastic part, the unwanted vibration or shock transmission between the flux elements 4, 4 'is reduced and the toughness of the hinge pin 3 is improved. The small diameter of the tension member allows an effective use of the shock-absorbing effect Middle part. By screwing the tension element 6 with the bearing pieces 8, 8 ', the structure of the hinge pin 3 is flexible, since both the flow elements 4, 4', as well as the middle piece 7 are easily replaceable.

The Fig. 7 to 12 show a designated as a whole with 103, second embodiment of a hinge pin, which is used as an alternative to the first embodiment 3. Functionally equivalent components of the second embodiment are designated by the same reference numerals, but increased by 100.

In contrast to the first embodiment, the hinge pin 103 has no tension element. Rather, two flow elements 104, 104 'are provided, which each have threaded extensions 104a, 104a' at their two front ends. These thread extensions 3 engage in complementary threaded bores 105, 105 'which are provided in the bearing pieces 108, 108' and the center piece 107 ( Fig. 9 ). The bearing pieces 108, 108 'have key surfaces 108a, 108a'. As Fig. 12 again, the flow elements 104, 104 'do not abut one another, but an air gap 121 is provided between them to improve the decoupling of the two flow elements 104, 104' from each other and a slight relative displacement of the two flow elements 104, 104 'and thus the Bearings 108, 108 'to allow each other for the purpose of shock absorption. For this purpose, the center piece 107 again has shock-absorbing properties and a low permeability. The flux elements 104, 104 'are made of a soft ferromagnetic material, such as ferrite.

All parts 104, 104 ', 105, 107, 108, 108' of the hinge pin 103 are screwed together. Also in this embodiment, chamfers 111, 112 are provided, which cause a self-centering of the components when screwing together.

It is understood that alternatively the threaded extensions can also be realized on the bearing and center pieces and, accordingly, the complementary threaded holes in the flow elements.

In the assembled state of the device according to the invention the hinge pin defines the hinge axis S, ie its longitudinal central axis A and the hinge axis S coincide.

LIST OF REFERENCE NUMBERS

100

contraption

1

Primary power coil

2

Secondary power coil

3, 103

hinge bolts

4, 4 '; 104, 104 '

flow elements

104a, 104a '

Threaded extensions

6

tension element

6 '

thread

6 "

inner thread

7, 107

centerpiece

8, 8 '; 108, 108 '

bearing pieces

8a, 8a '; 108a, 108a '

key areas

9

Signal transmission coil

10

Signal transmission coil

11, 111

chamfers

12, 112

chamfers

13

constriction

14

band part

15

band part

16

band part

17, 17 '; 117, 117 '

Against front sides

18, 18 '; 118, 118 '

front sides

19, 19 '; 119, 119 '

front sides

20, 20 '; 120, 120 '

Against front sides

105

threaded hole

121

air gap

A

Center longitudinal axis of the hinge pin

S

hinge axis

Claims (15)

Apparatus for the contactless transmission of electrical energy between a wall and a wing hinged to said wall about a hinge axis (S), comprising a primary coil (1, 10) attachable to the wall, having a secondary coil (2, 9) attachable to the wing , and with a belt pin (3, 103) serving as a magnetic flux guide between the primary coil (1, 10) and the secondary coil (2, 9),
characterized,
in that the hinge pin (3, 103) has at least one flow element (4, 4 ', 104, 104') configured as a prefabricated component with end faces (18, 19, 18 ', 19', 118, 119, 118 ', 119') and at least one bearing piece (8, 8 '; 108, 108') having a counter-end face (17, 17 ', 20, 20', 117, 117 ', 120, 120'), and at least one end face (18, 19, 18 ', 19', 118, 119, 118 ', 119') of the flow element (4, 4 ', 104, 104') against a counter-end face (17, 17 ', 20, 20', 117, 117 ', 120, 120 ') of the bearing piece (8, 8', 108, 108 ') is braced. Apparatus according to claim 1, characterized in that the at least one flow element (4, 4 ') passing through the tension element (6) is provided, which is connected to at least one bearing piece (8, 8'). Apparatus according to claim 2, characterized in that the tension element (6) with the at least one bearing piece (8, 8 ') is screwed. Device according to one of claims 1 to 3, characterized in that the hinge pin (6) has two mutually by a central piece (7), which facing away from each other end faces (20, 20 '), spaced apart flow elements (4, 4') , Apparatus according to claim 6, characterized in that the central piece (7) has damping properties. Apparatus according to claim 5, characterized in that the tension elements (6) with bearing pieces (8, 8 ') is screwed, forming the end pieces. Device according to claim 1, characterized in that on the at least one flow element (104, 104 ') at least one threaded extension (104a, 104a') or a threaded bore, and that on the opposite end face (117, 117 ') of a bearing piece (108 , 108 ') a complementary threaded bore (105') or a thread extension are provided, so that the at least one flow element (103) with the bearing piece (108, 108 ') can be screwed. Device according to claim 7, characterized in that the hinge pin (103) comprises two flow elements (104, 104 ') spaced apart from each other by a central piece (107), which faces away from each other (120, 120'), the middle piece (107) at its opposite end faces (120, 120 ') to the threaded extensions (104a, 104a') or the threaded bores of the flow elements (104, 104 ') complementary threaded holes (105) or thread extensions comprises, so that the flow elements (104, 104' ) are screwed to the center piece (107). Apparatus according to claim 8, characterized in that the central piece (107) has damping properties. Device according to one of claims 1 to 9, characterized in that the bearing pieces (8, 8 ', 108, 108') have wrench surfaces (8a, 8a ', 108a, 108a') for applying a turning tool. Device according to one of claims 1 to 10, characterized in that the at least one bearing piece (8, 8 '; 108, 108') has a centering surface (17, 17 ', 117, 117') and the at least one flow element has a counter-centering surface (18 , 19, 18 ', 19', 118, 119, 118 ', 119'). Apparatus according to claim 4 or 8, characterized in that the central piece (7, 107) Gegenzentrierflächen (20, 20 ', 120, 120') for each one Centering surface (19, 19 ', 119, 119') of a flow element (4, 4 ', 104, 104'). Device according to one of claims 1 to 12, characterized in that the bearing pieces (8, 8 ', 108, 108') are made of a material with low permeability. Apparatus according to claim 4 or 8, characterized in that the central piece (7, 107) is made of a material with low permeability. Tape bolt (3, 103) of a device (100) according to one of claims 1 to 14.

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