DE102004028595A1 - Energy/data transmission device for non-contact transmission of energy/data between fixed and moving components has primary and secondary windings - Google Patents

Abstract

A primary part (4) with a support (6) carrying a primary winding (5) fits on a fixed component (2). A secondary part (7) with a support (9) carrying a secondary winding (8) fits on a rotating component (3). One of the two supports (6,9) consists of support segments forming a ring so as to be separable. An independent claim is also included for a motor vehicle module with a device for non-contact transmission of energy and data so as to act as a component in a system for controlling the filling of a motor vehicle's tire.

Description

The The invention relates to a device for non-contact inductive transmission of electrical energy and data between a fixed one Component and a relatively rotatory to this movable component according to the preamble of Claim 1 and a motor vehicle module with such Device according to claim 16th

A device of the type mentioned is, for example, from the DE 199 46 934 A1 known. Herein, a module with angle sensor, contactless energy transmission and non-contact information transmission is proposed, which is arranged on a circuit board at least one primary coil for determining an angular position and at least one exciter coil for contactless energy transfer and information transfer is arranged on a circuit board, and a rotorseitiges component, in which at least one short-circuited secondary coil for determining the angular position is arranged on a printed circuit board and at least one receiver coil is arranged for non-contact energy transmission and information transmission. This contactless operating module according to the inductive principle can in the range of a steering wheel, for example a motor vehicle, for detecting the angular position of the steering wheel, for data transfer from and to electronic components in the steering wheel, for the energy supply of an integrated in the steering wheel airbag module and for the power supply of communication or control devices serve.

The Coils of the stator (primary part) and the rotor (secondary part) are concentric with respect to the axis of rotation of the device and constructed in the form of a Einzelleiterwicklung. The device therefore requires axial mounting. Inductive transmission is of changes the magnetic air gap e.g. dependent on installation tolerances.

Another example of a device mentioned in the introduction is in the DE 195 30 589 A1 described. The proposed therein arrangement for contactless inductive transmission of an airbag trigger signal consists of a transformer whose primary and secondary windings are in separate, around the axis of rotation of a steering wheel against each other rotatable shell cores. One of the two shell cores is designed as a closed ring and the other shell core consists of one or more ring segments. With the replacement of a closed shell core ring by a ring segment a required reduction of the inductance of the transformer and a weight saving to be achieved.

The Coil of the shell core designed as a closed ring is concentric relative to the axis of rotation of the arrangement and in the form of a single conductor winding built up. This part of the device requires axial mounting. For the Shell pits becomes a U-shaped Structure proposed. It is described that the U-profiles coaxial can be arranged one inside the other, whereby the inductive transmission insensitive to an axial offset of the shell cores, as a result of the magnetic Air gap not changed becomes.

Furthermore, the disclosure DE 195 29 528 A1 an arrangement for the contactless transmission of signals between a fixed and a rotatably mounted vehicle part. So that an axial offset between the stationary and the movable vehicle part from one part to the other contactless transmitted signal is influenced as little as possible, here a rotary transformer is provided, the shell cores for the primary and secondary windings either U-profiles or L-profiles exist, wherein the shell cores are coaxially mounted one inside the other, so that there is an air gap between the two, and wherein one of the two facing, the air gap forming end faces of the two shell cores is widened in the direction of the axis of rotation relative to the other end face.

By the different widths of the faces of primary and secondary parts the inductive transmission unaffected by axial displacements between these parts. The coil of at least one shell core is concentrically related on the axis of rotation of the arrangement and in the form of a Einzelleiterwicklung built up. This part of the arrangement requires axial mounting.

at this arrangement, which preferably between one with an airbag equipped steering wheel and arranged on the chassis control circuit is provided, is used to reduce the weight of the transformer suggested that an as L-profile trained shell core of the secondary winding only from a or a plurality of segments of a ring, the to this segmented shell core belonging concentrated winding on the short leg of the corresponding L-profile segment is wound.

While all the aforementioned devices offer the advantages of a non-contact transmission of energy and / or information by their inductive action principle, so the assembly of these known devices, however, is usually associated with considerable difficulties. Even with a segmental design of the shell core of Secondary coil, as in the DE 195 29 528 A1 or DE 195 30 589 A1 , At least one shell core - in the aforementioned solutions of the shell core of the primary coil - designed as a compact, rotationally symmetric component, which can be pushed onto the rotating component during mounting on a rotating system only in the axial direction or frontally attached to a shaft end. With a uniform concentric structure of the primary coil and the secondary coil, the assembly cost increases accordingly. Particularly hindering prove this mounting restrictions in motor vehicle construction with larger rotating systems, such. B. at a vehicle shaft.

It is therefore an object of the present invention, one after the inductive Principle working device for contactless transmission of energy and data between a fixed component and a relatively rotational to this movable component and a hereby equipped motor vehicle module to provide, with a continuous and largely independent of angle of rotation Power transmission, a simplified installation and a space-optimized arrangement are possible.

According to the invention this Task with a device according to the characterizing features of claim 1 and a motor vehicle module according to the features of claim 15.

The in this case provided device in which on the fixed component a primary part with a a primary winding carrying carrier is arranged and on the rotatably movable ble component, a secondary part with one carrying a secondary winding carrier is arranged with the inventive design, in the at least one of the two carriers divisible from at least approximately a ring forming carrier segments is constructed and the associated winding in such a way over the carrier segments guided is that the carrier segments with the winding part arranged thereon, a coil row circuit form, the advantage of a divisibility of a coil arrangement also in a total rotationally symmetrical coil structure, whereby the Assembly of the device according to the invention over known Devices is considerably simplified.

The Divisibility of the carrier and the winding is in particular by the one double-line winding performing inventive guide the Winding over the carrier segments and the structural design of the winding with a series circuit achieved by in each case a coil forming windings.

In an advantageous embodiment of the invention, the divisible primary or secondary part of two Be constructed segments, the segments preferably form ring halves, which at least approximately cover a ring angle range of 180 °. A constructed in this way of two ring halves Überträgerteil needed due to the limited number of parts and the simple design of the winding a particularly low cost in the production and requires even a very small installation effort.

By each approximately a ring angle range of 180 ° covering Winding parts of these two segments can be a particular advantage almost independent of angle of rotation and thus continuous inductive transmission can be achieved.

The carrier can to train one for the contactless inductive transmission Spaced from energy and data required air gap executed to each other be that the magnetic flux the air gap axially to the axis of rotation of the rotationally movable component or radially to this axis of rotation cuts. In erstgenanntem case, it is useful if the carrier axially spaced apart by an air gap and the one carrier segment associated winding part in the carrier segment at least approximately semicircular in guided a first radius and is attributed to a radial misalignment, so that a favorable area for the guidance of the magnetic flux is achieved. In the latter case, the Carrier radially be arranged in each other to form the air gap, wherein the one assigned to a carrier segment Winding part expediently in the carrier segment at least approximately semicircular guided in a first radius and returned to an axial offset.

Either the carrier the primary winding as well as the carrier the secondary winding can be in spatial concentrated form - for example as a ring segment - trained be, and the other carrier divisible executed be. It is particularly advantageous to do this with the rotationally moving Component as a divisible arrangement and that with the fixed component as spatial to design a concentrated arrangement.

This ring segment may be formed, for example, with an E-core profile or as a rod core coil. In a further advantageous embodiment, the ring segment can also be formed with a dividing support partially circumferentially encompassing U-profile, which has the advantage that with an axial relative movement of the carrier to each other, the inductive Übertra is not affected, since the resulting magnetic air gap remains constant.

to Achieving the consistent inductive transmission can at an alternative arrangement, the carrier radially into each other and with an air gap provided between the facing peripheral surfaces be, wherein one of the peripheral surfaces across from the peripheral surface of the other carrier is widened so that an axial relative movement of the carrier against each other no effect on the width of the air gap and ensuring the energy and data transmission Has.

In An advantageous embodiment of the invention can at least one of the carriers as a pot core with an E-core profile be formed, wherein the winding expediently between the respective E-thighs is included. In a further embodiment can at least one of the carriers Also be designed as a board, wherein the arranged on the support Winding in this case also as a printed circuit feasible is.

It It is understood that the skilled person depending on the application also different Can provide embodiments of the respective carrier, wherein the flux-conducting material, e.g. Ferrite or plastic-bonded ferrite, respectively required Performance and the conditions of use is adapted.

A Another embodiment of the invention is that a positioning for adjusting a fixed axial position of the primary relative to the relative to the primary part radially rotatable abutment is provided. This has the advantage that with an additional Relative movement between the rotating component and the stationary component, e.g. an angular offset or a combination of angular offset and spatial Shift, a good and almost unaffected inductive transmission between primary and secondary part ensured can be. This is achieved by using the fixed component connected transformer part or carrier by means of a suitable component such on the rotating component is arranged, that the angular position of this Übertagerteils relative to the other transformer part changeable in a meaningful area is, and this transmitter part nevertheless not moved synchronously with the moving component.

When mechanical component for the angular compensation allowing fixation of the non-rotating transmission part on the rotating component, e.g. a fixing element with the Properties of a plain bearing can be selected. Such a fixing element Can be done very easily due to the relatively low load and as a material, e.g. Plastic used. The fixing element In the simple case, it can consist of two parts. When the rotating Component is a shaft is synchronously mitbewegte part of the fixing element arranged concentrically around the shaft. This part becomes concentric enclosed by a non-rotating part. The non-rotating Part serves to accommodate the primary or Secondary part of the transformer or at the same time it forms the carrier of the associated transmitter part. The non-rotating part is over a suitable flexible holder connected to the solid component. This bracket prevents rotation while leaving an angle change to. Such a holder may e.g. through a flexible wire will be realized. Advantageously, the electrical line to Connection of the corresponding transmitter part with a fixed controller along this flexible bracket guided.

The non-rotating part can be unbalanced, symmetric, concentric or spoke-like with only one or more spokes. It may vary depending on the version with only one transmitter part (Carrier and windings) or with several connected coil segments (incl. Carrier) be provided.

Especially advantageous is the execution the parts of the fixing element of divisible halves, the can be mechanically connected together in a suitable manner.

One Another advantage of this arrangement is that by an angle compensation permissible fixing of the transmission part at the same time a reliable one Setting a small magnetic air gap is made possible. As a result, the properties of an inductive transmission significantly improves or can reduce the volume of construction.

The described an angle compensation allowing fixation of a transmission part can for the embodiment of the invention Ring segments as E core profile, as a bar coil and as the divisible carrier encompassing U-profile executed be.

The inventive device is suitable in principle for energy and data transmission between a fixed Component and a relatively rotatory to this movable component in all areas of mechanical engineering, where a requirement for a non-contact Energy and / or data transmission given is. Particularly noteworthy are the areas of machine tool construction, rail vehicles and motor vehicle construction.

Accordingly, it is particularly advantageous if the fixed component and the rotational movable component represent each motor vehicle components. Here comes as an application in particular a system for controlling a filling of a tire of a motor vehicle and / or monitoring of tire air pressure and temperature of wheels ei nes motor vehicle in question. Other areas of application in motor vehicles are systems such as steering wheel steering column or hinges or flaps between the body and doors or closure means.

Especially advantageous in terms of mountability and spatial possible arrangements is a motor vehicle module with a device according to the present invention Invention, wherein the device for contactless transmission of energy and data part of a system for regulating a filling a tire of a motor vehicle.

Preferably In this case, the tire is arranged on a rim and has a valve device at least for air supply on which valve means cooperates with an electrically operated compressor, which with an associated electrical actuator forms a decentralized unit associated with a wheel of the motor vehicle, wherein the device according to the invention for continuous, speed, independent of angle of rotation and rotation direction of the energy supply Compressor is provided.

The Power supply of the compressor by means of a Rotationsübertragers for contactless inductive energy transfer from an electrical energy source of the motor vehicle to the electrical actuator The compressor is carried out without the power loss, which at touch contacts inevitably is given, and without this also necessarily resulting Wear.

The possible additional Data transmission allowed as well as a fully flexible pressure control in a dynamic Operation itself during the drive of the vehicle, so that at any time one the vehicle and the driving situation just adjusting the tire pressure by fill up or venting air can be.

at an advantageous embodiment of the motor vehicle module according to the invention are the compressor and its associated electrical actuator together as a compact unit on a while moving the vehicle arranged synchronously to the wheel speed rotating component.

Around the pressure that is actually present in a tire during activation of the compressor to be able to it is expedient to provide a control unit, which has a module for tire pressure regulation, and which dependent on of print data, for example, from a radio-controlled Sensors working pressure monitoring device be delivered, the electrical actuator of the compressor on the inventive device for energy and data transmission controls.

Regarding the arrangement of the device for inductive energy transmission via an air gap to the electrical actuator of the Compressor provides an interface between a stationary vehicle component, d. H. a chassis-fixed component, and a rotating wheel component, such as As a rim on.

Of the Compressor can in such an arrangement on a rotating Wheel component, such as the rim, be arranged.

alternative can the compressor together with the electric actuator also on a rotating vehicle component, such as the vehicle axle be arranged, with a simple pneumatic connection between the rotating compressor and the valve device provided in such a way may be that of the compressor a pneumatic line bypassing around an axle joint into the rim and into the valve device leads.

A such suitably sealed designed pneumatic line of course with coincident drill holes at any point be provided. In a very advantageous embodiment can the pneumatic line in a connection area between a Arm and the rim on one of the components as an annular groove or annular channel, which in the assembled state congruent with at least one bore in the other component is executed. The design in the form of an annular channel and corresponding holes has the particular advantage that the tire in any Position can be mounted without causing a preferential direction or special mechanical conditions must be considered. Between vehicle component and rotating rim is for a seal ensured by, for example, a suitable seal is appropriate.

For the valve device can different embodiments and arrangements or cultivation sites are used. For filling up the tire can be a conventional Check valve on End of the connection channel and at a suitable connection point be used between rim and tire.

For the padding and bleed can be an adjustable valve with an additional outlet for draining be used by air from the tire. Such a valve can be designed as electrically controllable valve, wherein the electrical control the valve device over separate lines, over Radio or over an inductive non-contact data transfer by means of this provided fiction, contemporary device can be done. Likewise, the electrical energy supply the valve device by means of this device.

In another embodiment of the system according to the invention can the device for inductive energy transmission at a connection between a stationary Vehicle component and a rotating wheel component, such as the rim, be arranged and an interface between these Form components.

The electrical actuator and the compressor can be arranged eccentrically in the rim, in which case the device for energy transfer at a contact area of the rim eccentric to a rim and Wheel axle is arranged. The primary part of the device for energy transmission is fixed to the vehicle and acts with the secondary part of the Device for energy transmission, which is firmly connected to the rim, together.

In one in terms of inertia on the wheel, the imbalance risk at the wheel and the freedoms in the wheel design even more advantageous solution can the device for energy transfer be arranged on a vehicle axle, wherein the primary part of the device for energy transfer with a stationary one Vehicle component and the secondary part the device for energy transmission connected to the vehicle axle or a component rotating therewith is.

each of these designs is characterized by a low cost in both the constructive Realization of the motor vehicle module as well as its handling, as during assembly or a tire change, off. Each of the shown embodiments represents a robust solution with a low risk of damage represents.

Of the Operation of the described motor vehicle module allows in particularly advantageous embodiments not just a filling of the tire, but also a regulated deflation of air - both depending on the vehicle as well as driving situation-dependent. Overall, the applications of the system of a refill at low pressure loss, d. H. a controlled filling in a quasi-stationary one Operation, a standard tire pressure monitor with filling and venting in quasi-stationary Operation to an adaptive pressure control and automatic, fully flexible pressure control during dynamic operation during the Journey.

One Another advantage, which in an inventively designed Motor vehicle module results, is the possibility of the required components in the area of the inside of the rim or in the area around the wheel suspension. This will change the external appearance of the wheel or the rim is not affected. In addition, it is advantageous that an arrangement of the components, in particular of the compressor and the electrical actuator, avoided in the center of the wheel or rim side in the wheel axle can be.

Further Advantages and advantageous embodiments of the subject to The invention are the claims, the drawing and the following described in more detail embodiments refer to.

there demonstrate:

1 a simplified cross section through an inventive device for contactless transmission of energy and data with a primary part and a secondary part in isolation;

2 a plan view of the secondary part of the device according to 1 in a simplified representation;

3 a cross section through a second embodiment of a device for contactless transmission of energy and data with a primary part and a secondary part in isolation, the primary part according to 1 is trained;

4 a principle of supervision on the primary part according to 1 and 3 in isolation;

5 a plan view of an embodiment variant of the primary part;

6 a simplified cross-section through another embodiment of a device according to the invention for non-contact transmission of energy and data, in which an air gap between the secondary part and the primary part extending in the longitudinal direction of the axis of rotation of the secondary part;

7 a schematic representation of a second därwicklung the secondary part of the device according to 6 in isolation;

8th a simplified cross section through an alternative embodiment of the device according to 6 and 7 which differs from this by the configuration of a carrier of the secondary winding;

9 a further embodiment of a device according to the invention for non-contact transmission of energy and data, in which the primary part radially surrounds the secondary part;

10 a simplified view of the device according to 9 ;

10A a simplified cross section for a rotary transformer with relative to the secondary rotatable arranged primary part.

10B a simplified plan view of the primary part according to 10A ,

10C a simplified plan view of a dual primary part of an arrangement accordingly 10A ,

11 a schematic diagram of a motor vehicle module according to the invention with a system for controlling a filling of a tire of a motor vehicle in a block diagram;

12 a block diagram of a second embodiment of a motor vehicle module according to the invention with a system for regulating a filling of a tire;

13 a block diagram of a third embodiment of a motor vehicle module according to the invention;

14 a first structural embodiment of a motor vehicle module according to the invention;

15 a section of a pneumatic line in a connection region between a suspension and a rim in a simplified cross section;

16 an alternative arrangement of the pneumatic line according to 15 in a connection area between a wheel suspension and a rim in a simplified cross-section; and

17 a further structural embodiment of a motor vehicle module according to the invention.

Referring to the 1 . 3 . 6 . 8th . 9 and 10 , in which, for reasons of clarity, the same reference numerals are used for functionally identical components, is a device 1 for contactless transfer of energy and data between a stationary component 2 and a relatively rotational to this movable member 3 shown in principle in isolation, with the fixed component 2 a primary part 4 . 4 '' . 4 ''' with a a primary winding 5 . 5 '' . 5 ''' carrying carrier 6 . 6 '' . 6 ''' is arranged and on the rotatably movable component 3 a secondary part 7 . 7 '' . 7 ''' with a secondary winding 8th . 8th'' . 8th''' carrying carrier 9 . 9 ' . 9 '' . 9 ''' is arranged. The primary part 4 thus forms a stator and the secondary part 7 a rotor of the total of a rotary transformer performing device 1 ,

In the illustrated embodiments, each of the secondary winding 8th carrying beams 9 . 9 ' . 9 '' . 9 ''' divisible from two at least approximately one ring forming carrier segments 9A . 9A '' . 9B . 9B '' built up. The wound secondary winding 8th . 8th'' . 8th''' is in particular in the supervision of the 2 and 7 way shown on the carrier segments 9A . 9B respectively. 9A '' . 9B '' led that the carrier segments 9A . 9B respectively. 9A '' . 9B '' with this each associated winding part 8A . 8A '' respectively. 8B . 8B '' form a coil, wherein the carrier segments 9A . 9B respectively. 9A '' . 9B '' with the winding parts arranged thereon 8A . 8B respectively. 8A '' . 8B '' represent a coil series circuit.

The carrier 6 of the primary part 4 can as in the execution according to 4 around a middle E-thigh 6A be wound concentrically on the primary-side carrier, so that the primary winding 5 and the carrier carrying them 6 form a primary coil.

The 5 shows an alternative embodiment of a carrier 6 ' of the primary part 4 which has a ring-segment-shaped cross section around which the primary winding 5 is guided.

The carrier segments 9A . 9B respectively. 9A '' . 9B '' form in the embodiments shown in each case a ring half, which cover at least approximately a ring angle range of 180 ° and cup-like about an axis of rotation 10 can be arranged.

In the execution according to 1 and 2 is the first semi-annular support segment 9A associated winding part 8A with a connection 11 to a control unit 30 connected and leads from a sickle end of the first carrier segment 9A semi-circular with a first radius to the opposite crescent end of the carrier segment 9A , learns there regarding the radius of the Trä gersegments 9A a radial offset and becomes with a smaller radius to the first sickle end of the carrier segment 9A returned from where the first winding part 8A the secondary winding 8th back to a second connection 21 at the control unit 30 is returned.

It is advisable to connect the electrical leads from or to the respective connection 11 . 21 . 13 . 14 of the control unit 30 To execute so flexible or to lay that a simple assembly of the divisible arrangement is supported. This can be done for example via flexible conductors or a laying in a conductor loop, so that a shift or rotation between the sub-segments for assembly purposes is possible.

From this second connection 21 extends the secondary winding 8th to one on the second carrier segment 9B arranged winding part 8B associated port 13 , From this connection 13 is the secondary winding 8th on the second semi-annular support segment 9B of the abutment 7 guided, wherein it is first of a first crescent end of the second support segment 9B , which is the first crescent end of the first support segment 9A is opposite, with a radius which is the radius of the return of the first winding part 8A on the first carrier segment 9A corresponds to the second crescent end of the second support segment 9B is guided. Analogous to the winding guide on the first carrier segment 9A learns the the second carrier segment 9B associated winding part 8B at the second crescent end of the carrier segment 9B a radial offset, wherein the second winding part 8B here radially outward on the second carrier segment 9B is guided and with a larger radius, which is the radius of the leadership of the first winding part 8A from the first crescent end to the second crescent end on the first carrier segment 9A corresponds, back to the first crescent end of the second support segment 9B to be led. After this is the secondary winding 8th to another connection 14 on the control unit 30 guided.

Overall, this results in a mirror-image arrangement of each of a double line winding performing winding parts 8A and 8B on the respective carrier segments 9A and 9B , which in the area of their sickle ends by a first separation point 15A and a second separation point 15B are separated. These separation points 15A . 15B which the mechanical divisibility and thus the easier assembly of the device 1 advantageously have no appreciable influence on the transformer characteristics.

The carrier 9 the secondary winding 8th is in accordance with the execution 1 and 3 like the carrier 6 the primary winding 5 formed with an E-core profile, wherein the carrier segments 9A . 9B each integrated into a molding plastic part and having plastic-bonded ferrite or solid ferrite material to improve the inductive transmission or to increase the transmittable power.

In contrast, in the embodiment according to 3 the carrier 9 ' the secondary winding 8th as a thin-layer board with the secondary winding 8th consisting of conductor tracks, formed. Alternatively, the carrier 9 ' be realized with a lower required performance as an elongated flat film. In this case, the secondary winding arranged thereon 8th also represent a printed circuit.

In assembly with the primary part 4 and their spatially concentrated carrier 6 are the carrier segments 9A . 9B and thus the wearer 9 of the abutment 7 axially with respect to its axis of rotation 10 from the carrier 6 of the primary part with the primary winding 5 through an air gap 16 separated the magnetic flux 17 around the primary winding 5 and the secondary winding 8th axially to the axis of rotation 10 of the rotationally movable component 3 and the abutment 7 cuts. Thus, over the air gap 16 Energy and data by inductive means contact-free from the stationary primary part 4 to the rotating abutment 7 or in the opposite direction or in both directions.

It It is understood that the expert guide the windings on the carriers and the number of turns can adapt to the particular application.

The 6 to 8th show embodiments of the device 1 in which the primary winding 4 '' or the secondary part 7 '' radially into each other and through an air gap 18 spaced from each other, wherein the magnetic flux 17 the air gap 18 radial to the axis of rotation 10 of the rotationally movable component 3 cuts.

7 shows a variant of a transformer with radially arranged transformer parts after 6 in divisible design. The division is exemplary of a division of the carrier 6 '' and the winding 8th'' shown in 2 shell-like halves. In again 7 apparent principle representation of the leadership of the secondary winding 8th'' can be seen in this embodiment, is in an embodiment of the carrier 9 '' of the abutment 7 '' with two shell-like, ring halves representing carrier segments 9A '' . 9B '' the one respective carrier segment 9A '' respectively. 9B '' associated winding part 8A '' respectively. 8B '' in the relevant carrier segment 8A '' respectively. 8B '' at least approximately semi-circular guided in a first radius and after an axial offset 19 preferably recirculated in the same radius semicircular. Thus, each winding part provides 8A '' . 8B '' a double line winding in the axial direction of the axis of rotation 10 which is with a control unit 30 connected is.

A further advantageous embodiment possibility of the device 1 in which essentially an arrangement of the carrier 6 ''' the primary winding 5 ''' and the vehicle 9 ''' the secondary winding 8th''' according to the 1 is chosen, show 9 and 10 , Here is the carrier 6 ''' the primary winding 5 ''' formed as a ring segment, which is the divisible carrier 9 ''' the secondary winding 8th''' partially surrounded circumferentially with a U-profile. In this way is an axial offset of the primary part 4 ''' and abutment 7 ''' in the axial direction of the axis of rotation 10 harmless for inductive transmission.

The 10A shows an alternative embodiment of a transformer arrangement, in which the not moving along the transformer part, for example, the primary part 4 , rotatable to the rotating transformer part, eg the secondary part 7 , is arranged. The primary part 4 can by an additional receiving element 301 being held. For fixing the primary part 4 relative to the secondary part 7 serve the fixing elements 302 and 303 , The rota-saving fixing element 303 is on the rotating component 3 , eg a shaft. The non-moving fixing element 302 encloses the fixing element 303 , so that an angular offset around the shaft is possible. The fixation elements 302 and 303 can be performed for example in the form of a simple bearing or plain bearing. The fixing element 302 is with the receiving element 301 connected. The receiving element is provided with a suitable flexible holder 304 connected to the stationary component, so that a rotation of the receiving element 301 is prevented. Moreover, by this embodiment of the holder a multi-dimensional limited relative movement between the stationary component 3 and the receiving element 304 allows, without thereby the air gap is changed or the transmission properties are adversely affected. The electrical wires 305 between the primary part 4 and the primary-side controller connected to the stationary component 306 are suitably along the flexible bracket 304 too mislaid and also flexible. The receiving element 304 and the fixing element 301 can be executed as a single component.

10B shows the top view stored stored primary part 4 according to 10A , The fixation elements 302 and 303 can be split in the direction of the axis of rotation. This considerably simplifies mounting on a shaft. The sub-elements can be joined together by choosing a suitable connection technique.

10C shows an alternative embodiment of the arrangements according to 10A and 10B , The arrangement sees 2 opposing primary parts 4a and 4b on a two-sided receiving element 301 ' in front. The arrangement can be extended to design variants with a plurality of receiving elements in various structural design and multiple primary parts. Alternatively, an arrangement with a rotationally symmetrical receiving element can be selected in conjunction with one or more primary parts. The electrical interconnection or connection of the primary parts can be carried out by a person skilled in the art in a suitable manner.

A structural design of the transformer arrangement with a rotatable relative to the secondary part arranged primary part according to 10A The expert can also according to a transformer arrangement 9 and 10 be transmitted.

The 11 to 17 show an advantageous application of a device according to the invention 1 for the contactless transmission of energy and data in a motor vehicle module, which represents a system for controlling a filling of a tire of a motor vehicle.

Referring to 11 is a system for controlling a tire inflation 102 of a motor vehicle on which tires 102 a pressure sensor 104 attached, which is the current compressed air data present by radio to a tire pressure monitoring system 106 which supplies the signals from the pressure sensor 104 as input signals to a control unit 108 provides.

As a pressure sensor 104 For example, a conventional detection system can be used. This contains suitable means for electrical power supply, for. As an inductive transmission system, a battery or regenerative systems, such. B. based on piezoelectric generators, as well as facilities for data transmission, z. B. inductive or by radio.

In another embodiment, the current air pressure data can also be generated via other systems with an indirectly operating pressure detection and the control unit 108 and therein the pressure control, z. B, via a data bus connection 112 , to provide.

The control unit 108 , which continues with an energy source in the form of the electrical system 12 of Motor vehicle and the data bus 112 connected, has a module 114 for tire pressure control, which in the present case as a switch-off control of a power supply of an air compressor 118 is trained.

The power supply of the compressor 118 includes a present as an electric motor 120 trained electrical actuator for the compressor 118 and a device for electrical energy transmission 1 to the electric motor 120 , The compressor 118 is together with the electric motor 120 arranged on a rotating during movement of the vehicle component.

The device for electrical energy transmission 1 works contactless, by being designed as a rotary transformer with inductive energy transfer.

Depending on the control sets the electric motor 120 the compressor 118 in operation, which compressed air L and to a valve device 124 leads, which is presently designed as a check valve and the filling of the tire 102 allowed.

The control of the valve device 124 for filling and bleeding the tire 102 is about the module 114 specified for tire pressure control of the control unit. The control takes place via the in 11 shown connection 126 used as a line or a suitable transmission system z. B. radio, can be executed. A control of the valve device 124 is also about in 11 shown connection 129 from the electric motor 20 to the valve device 124 possible. The connection 129 can be used as a line or a suitable transmission system, z. B. inductive, be executed. For filling the valve device 124 advantageously designed as a check valve. The connections 126 or 129 are not required then.

At the in 12 shown embodiment is in contrast to the embodiment according to 11 in addition to the wheel-side valve device 124 another valve device 124A at the air outlet of the compressor 118 arranged, which allows the air pressure immediately behind the compressor 118 and at the beginning of a pneumatic channel 142 with a suitable pressure gauge 104 capture. Deviating from a pressure gauge 119 be used, the pressure gauge 119 about the device for electrical power supply 1 is supplied with electrical energy.

The pressure control is carried out according to the description 1 ,

As wheel-side valve device 124 that before the tire 102 is arranged, in particular, is an arrangement at a connection between the wheel suspension and rim, which is automatically actuated during assembly and disassembly of the wheel, z. B. by a mechanical forced operation.

In such an embodiment, no additional transmission link such as the radio link between the pressure sensor 4 and the tire pressure monitoring system 106 according to the embodiment according to 1 needed.

In 13 is a respect to the execution according to 11 and 12 extended variant shown in the functionally identical components in 11 and 12 used reference numbers apply.

Unlike the execution after 12 The air pressure data are stored directly in a control and regulation unit 121 processed for tire pressure. The electrical actuator 120 is about this control unit 121 driven. The control unit is the current air pressure preferably via a pressure gauge 119 made available. Due to the structural arrangement and the spatial proximity can be a conventional electrical line for this connection 150 be used. The pressure gauge 119 can via the device for electrical power supply 1 or a suitable line connection to be supplied with electrical energy.

Setpoint presets for the tire pressure are the control unit 121 over the device 1 provided, which in this case is preferably designed as an energy and data transmission system, wherein the data transmission is carried out as inductive transmission.

The device for electrical power supply 1 is for bidirectional data transfer from and to tire pressure regulation 114 in the control unit 108 designed. As a result, the actual value of the air pressure and other diagnostic data, the current states of the components, for. B. the electrical actuator 120 , describe and detected by conventional methods or measuring devices, via the device for electrical power supply 1 to the control unit 108 be transmitted.

In such an embodiment, the actual values of the air pressure data can be used by the tire pressure monitoring system 106 from the controller 108 be passed without having a bulky pressure gauge 104 in tires 102 is needed.

At the in 13 illustrated embodiment, the valve devices 124 correspond to the Execution in 12 Find application. Alternatively, one or both valve devices 124 be executed as controllable or switchable valves, via the control and regulation unit 121 can be controlled so that both the filling and the venting of the tire 102 is possible. An embodiment of the valve device is advantageous 124 at the air outlet of the compressor 122 as electrically controllable valve with air outlet and an embodiment of the wheel-side valve device 124 as a mechanically operated check valve on the connection between the wheel suspension and rim, which is automatically opened during wheel assembly.

In the execution of the 13 is always an energization of the device 1 for electrical power supply from the connection to the electrical system 12 given the current provided by z. B. is converted into a medium frequency energy of, for example, 100 kHz, and then on the rotary transformer or the device 1 a conversion unit for generating a suitable output voltage, for example, a rectifier for generating a DC voltage, is supplied. According to the of the device 1 provided electric power and the target value of the air pressure is the electric actuator 120 from the control unit 121 driven.

The variants according to 11 - 13 , shown for a vehicle module for tire filling, can be transmitted on other motor vehicle modules. These include, in particular, a motor vehicle module for controlling steering wheel functions (airbag, operating, display and electrical control functions) in conjunction with an inductive transmission system between steering column and steering wheel or a motor vehicle module in doors or flaps in conjunction with an inductive transmission system between cabin and doors or flaps.

In 14 is a constructive embodiment of the system according to the invention for controlling a filling of in 14 not shown tire 102 shown at the device for power supply 1 of the compressor 118 an interface between a chassis-mounted component 2 a motor vehicle and a rotating vehicle component forms. The rotating vehicle component, in this case the compressor 118 with its associated, designed as an electric motor electrical actuator 120 is arranged according to the embodiment of 14 a rotating vehicle axle 3 , The arrangement of the compressor 118 and the electric motor 120 is in one at an axle joint 146 adjacent area within an axle seal bellows 147 provided and allows a great deal of design freedom.

For pneumatic connection of the compressor 118 with the in the rim 140 arranged valve device 124 , which allows an air supply into the tire and an air release from the tire, is used in 14 only schematically indicated by dashed line pneumatic line 142 , This pneumatic line 142 consists of a first, substantially axially parallel to the wheel or rim axis extending portion 142A and a second, essentially inside the rim 140 radially outward to the valve means 124 extending subsection 142B together. The first section 142A the pneumatic line 142 is like a bypass at the axle joint 146 passed and in a suspension 138 educated.

In one in the 15 and 16 closer connection area between the suspension 138 and the rim 140 meets the first section 142A the pneumatic line 142 on the second section 142B , The sealing effect of a seal used in the region of the connection between the sections 142A . 142B the pneumatic line 142 can in this case in connection with the wheel attachment via wheel bolts 141 be ensured.

In a variant of this, as rotating, the compressor 118 and its electric motor 120 receiving vehicle component and a rotating brake disc 136 a brake 135 serve, of which further components in the 14 a brake shoe 137 and a brake shoe hanger 139 are shown.

The compressor 118 can be performed arbitrarily depending on the application, with known compressor types z. As a diaphragm pump, a reciprocating compressor, a rotary compressor or a turbocharger are suitable.

In the 14 only schematically indicated device for electrical energy transmission 1 to the electric motor 120 and thus the compressor 118 is in this case a rotary transformer according to 1 and 2 , which an inductive energy and data transmission through the air gap 16 causes.

While in the illustrated device for data and energy transmission of the primary part 6 and the secondary part 9 in the axial direction of the vehicle axle 3 If they are arranged next to one another, they can also be arranged radially relative to one another in a different embodiment of the primary part of the secondary part.

In any case, such a device designed as a rotary transformer with non-contact inductive energy and data transmission ensures 1 a continuous energy and data transmission even when the wheel is stationary.

In 15 is schematically the connection area between the sections 142A . 142B the in 14 shown pneumatic line 142 shown. In the execution according to 15 is in an axial end face of the suspension 138 an annular groove 143 formed, in which the first section 142A the pneumatic line 142 empties. In the rim 140 is in an assembled state to the annular groove 143 on the suspension 138 congruent area a hole 144 formed, which part of the second section 142B the pneumatic line 142 is.

Another way of training the pneumatic line 142 , which allows any installation without preferential direction, shows the schematic diagram of 8th , Again 8th it can be seen, the annular groove 143 also on an area of the suspension 138 be formed, which is an area of the rim 140 enclosing radially, so that the annular groove 143 and the bore corresponding thereto 144 the pneumatic line 142 on each radial surfaces of the suspension 138 and the rim 140 are formed.

In further versions is self-evident also a reverse arrangement of annular groove and bore possible, d. H. that the annular groove on the rim and the at least one corresponding bore on the suspension are formed.

The 17 shows a further embodiment of a system for controlling a filling of a tire, wherein the vehicle-side and wheel-side base components in their configuration those of in 14 correspond to the execution shown.

Unlike the execution of the 14 forms the device 1 to power the compressor 118 Here an interface between a stationary vehicle component 2 ' and a rotating wheel component 3 ' , which in this case part of the rim 140 is.

The compressor 118 and its electric actuator designed as an electric motor 120 are in this embodiment variant eccentric in the rim 140 arranged. The power supply of the compressor 118 takes place here over in a contact area of the rim 140 on the vehicle-fixed component 2 ' eccentrically arranged to a rim or wheel axle device for energy transmission 1 , The device for energy transfer 1 is with a vehicle-side primary section 6 and a rim-side abutment 9 formed, wherein the transmission of electrical energy and data takes place contactless and inductive.

All described embodiments according to 11 to 17 are characterized by their robustness and allow constant compressor operation regardless of the speed, angle of rotation and direction of rotation of the wheel, so that an automatic and dynamic adjustment of the tire pressure is unproblematic regardless of the speed of the vehicle and even when reversing. Furthermore, by a device according to the invention in the embodiments shown, both the cost of manufacturing or integration of the system in conventional vehicle and wheel components and the cost of a tire change low.

Claims (22)

Device for non-contact transmission of energy and data between a stationary component ( 2 . 2 ' ) and a relatively rotationally movable to this component ( 3 . 3 ' ), wherein on the stationary component ( 2 . 2 ' ) a primary part ( 4 . 4 '' . 4 ''' ) with a a primary winding ( 5 . 5 '' . 5 ''' ) carrying carrier ( 6 . 6 ' . 6 '' . 6 ''' ) is arranged and on the rotatably movable component ( 3 . 3 ' ) a secondary part ( 7 . 7 '' . 7 ''' ) with a secondary winding ( 8th . 8th'' . 8th''' ) carrying carrier ( 9 . 9 ' . 9 '' . 9 ''' ), characterized in that at least one of the two supports ( 6 . 6 ' . 6 '' . 6 '' . 9 . 9 ' . 9 '' . 9 ''' ) divisible from at least approximately one ring forming carrier segments ( 9A . 9B . 9A '' . 9B '' ) and the associated winding ( 8th . 8th'' . 8th''' ) in such a way over the carrier segments ( 9A . 9B . 9A '' . 9B '' ), the carrier segments ( 9A . 9B . 9A '' . 9B '' ) with the winding part arranged thereon ( 8A . 8B . 8A '' . 8B '' ) form a coil series circuit. Device according to claim 1, characterized in that the divisible carrier ( 9 . 9 ' . 9 '' . 9 ''' ) of two carrier segments ( 9A . 9B ) is constructed. Device according to claim 2, characterized in that the carrier segments ( 9A . 9B . 9A '' . 9B '' ) Form ring halves which cover at least approximately a ring angle range of 180 °. Device according to one of claims 1 to 3, characterized in that the supports ( 6 . 6 ' . 9 . 9 ' ) axially to each other by an air gap ( 16 ) are spaced by the magnetic flux ( 17 ) axially of the axis of rotation ( 10 ) of the rotatably movable component ( 3 . 3 ' ) cuts. Apparatus according to claim 4, characterized ge indicates that the one carrier segment ( 9A . 9B ) associated winding part ( 8A . 8B ) on the carrier segment ( 9A . 9B ) is guided at least approximately semicircular in a first radius and returned to a radial displacement. Device according to one of claims 1 to 3, characterized in that the supports ( 6 '' . 9 '' ) radially into one another and through an air gap ( 18 ) are spaced apart, the magnetic flux ( 17 ) the air gap ( 18 ) radially to the axis of rotation ( 10 ) of the rotatably movable component ( 3 ) cuts. Apparatus according to claim 6, characterized in that the one carrier segment ( 9A '' . 9B '' ) associated winding part ( 8A '' . 8B '' ) in the carrier segment ( 9A '' . 9B '' ) at least approximately semicircular in Ers th radius and after an axial displacement ( 19 ) is returned. Device according to one of claims 1 to 7, characterized in that one of the two carriers as a ring segment ( 6 ' . 6 ''' ) is trained. Device according to claim 8, characterized in that the ring segment ( 6 ''' ) is formed with a divisible carrier regions circumferentially encompassing U-profile. Apparatus according to claim 8 or 9, characterized in that the carrier ( 6 ' . 6 ''' ) of the primary part ( 4 ) is designed as a ring segment Device according to one of claims 1 to 10, characterized in that at least one of the carriers ( 6 . 6 '' . 9 . 9 '' ) is designed as a pot core with an E-core profile. Device according to one of claims 1 to 11, characterized in that at least one of the carriers ( 9 ' ) is designed as a flat board or foil. Apparatus according to claim 12, characterized in that on the carrier ( 9 ' ) arranged winding ( 8th ) is a printed circuit or a printed circuit. Apparatus according to claim 1 to 13, characterized in that the fixed component ( 2 . 2 ' ) and the rotatably movable component ( 3 . 3 ' ) represent each motor vehicle components. Device according to one of claims 1 to 14, characterized by, a positioning means for setting a fixed axial position of the primary part ( 4 . 4 '' . 4 ''' ) relative to that in relation to the primary part ( 4 . 4 '' . 4 ''' ) radially rotatable secondary part ( 7 . 7 '' . 7 ''' ). Motor vehicle module with a device according to one of claims 1 to 15, characterized in that the device ( 1 ) for non-contact transmission of energy and data part of a system for controlling a filling of a tire ( 102 ) of a motor vehicle, the tire ( 102 ) on a rim ( 140 ) is arranged and a valve device ( 124 ) at least for air supply, which valve device ( 124 ) with an electrically operated compressor ( 118 ) which cooperates with an electrical actuating device ( 120 ) forms a decentralized unit associated with a wheel of the motor vehicle, and wherein the device ( 1 ) for continuous, speed, rotation angle and direction independent energy supply of the compressor ( 118 ) is provided. Motor vehicle module according to claim 16, characterized in that the compressor ( 118 ) and its associated electrical actuator ( 120 ) on the rotatably movable component ( 3 . 3 ' ) are arranged, which rotates synchronously to the wheel speed during movement of the motor vehicle. Motor vehicle module according to claim 16 or 17, characterized in that the device ( 1 ) for non-contact transfer of energy to the compressor ( 118 ) an interface between a stationary vehicle component ( 2 ) and a rotating vehicle component ( 3 ). Motor vehicle module according to one of claims 16 to 18, characterized in that the rotationally movable component is a rotating vehicle component ( 3 . 136 ), wherein a pneumatic connection between the compressor ( 118 ) and the valve device ( 124 ) is provided such that from the compressor ( 118 ) a pneumatic line ( 142 ) Bypass-like around an axle joint ( 146 ) in the rim ( 140 ) and therein to the valve device ( 124 ) leads. Motor vehicle module according to one of Claims 16 to 19, characterized in that the device ( 1 ) for non-contact transmission of energy and data to a vehicle axle ( 3 ), wherein the primary part ( 6 ) of this device ( 1 ) with a stationary vehicle component ( 2 ) and the secondary part ( 9 ) of this device ( 1 ) with the vehicle axle ( 3 ) or a component rotating therewith. Motor vehicle module according to claim 16, characterized in that the device ( 1 ) for non-contact transfer of energy to the compressor ( 118 ) an interface between a stationary vehicle component ( 2 ' ) and a rotating wheel component ( 3 ' ). Motor vehicle module according to claim 21, characterized in that the electrical actuating device ( 120 ) and the compressor ( 118 ) eccentric in the rim ( 140 ) and that the device ( 1 ) for non-contact transmission of energy and data at a contact area of the rim ( 140 ) is arranged eccentrically to a rim and wheel axis, wherein the primary part ( 6 ) of this device ( 1 ) fixed to the vehicle and the secondary part ( 9 ) of this device ( 1 ) with the rim ( 140 ) connected is.