DE102006030335B4 - System with drives under a rotary table - Google Patents

Abstract

System, in which drives (2) are supplied without contact under a movable, rotatably mounted part, i.e. turntable (1), by means of respective inductive coupling to one or more primary conductors (4), the housing of at least one drive (2) on a first side of the movable part is provided and a bearing (3) of the output shaft is provided on a second side of the movable part on a device which is connected to the movable part,wherein on the output side a flange (32) which comprises a centering flange (37), connects the drive (2) to a device connected to the movable part, with the movable part being supplied with energy and/or information in a contactless and inductive manner by means of a rotary transmitter, with an electronics box (20) being provided on the movable part, with at least one drive (2) comprises an electric motor and an electronic circuit for supplying the electric motor, the drive (2) being supplied inductively, wobe i a primary conductor (4) is provided on the drive (2) in such a way that there is an inductive coupling with a secondary coil comprised by the drive (2), with at least one primary conductor (4) in a recess, indentation, slot or cable duct of the drive (2) is provided, with a primary conductor (4) being supplied by the movably arranged part (22) of the rotary transmitter, from which the drives (2) can each be supplied with energy and/or information without contact by means of a secondary coil they contain, with the Rotary transmitter has a primary winding in the stationary part (21) and a secondary winding in the rotatably mounted part (22) to supply the primary conductor (4) which is inductively coupled to the secondary coils of the drives (2) and can also rotate with the drives (2), the primary conductor (4) is routed from the rotary transmitter via the electronics box (20) through a hollow shaft (23) to the turntable (1) and is laid there in a ring, with the primary conductor ( 4) the drives (2) supplied in series.

Description

The invention relates to a system with drives under a turntable.

In industrial plants it is known to supply drives from a network. For this purpose, the drives are usually connected using expensive connectors. In addition, the system or machine has a T-piece for each drive as an energy branch. These T-pieces are difficult to install and expensive, especially if they have to be used with a high degree of protection for wet areas or even aseptic areas.

From the DE 102 39 252 A1 a device for non-contact power transmission for a turntable is known as the closest prior art.

From the DE 103 60 599 A1 a system with drives on a rotatably mounted, movable part, ie a turntable, is known.

From the WO 2005/115 848 A2 is a machine for aligning and equipping objects.

The invention is therefore based on the object of creating simpler and more cost-effective cabling for drives and systems.

According to the invention, the object is achieved with the system according to the features specified in claim 1 and with the drive according to the features specified in claim 9 .

Essential features of the invention in the system are that it includes drives that are supplied without contact on a movable part, in particular a turntable or linear drive, by means of a respective inductive coupling to one or more primary conductors. The advantage here is that the cabling can be carried out quickly and easily and can also be clearly planned. In addition, the system can be used in wet areas and in aseptic areas, since the inductive coupling enables the housing to be designed to be smooth. In addition, there is a wear-free transmission of energy.

Another advantage is that the power supply to the drives is potential-free and there is no need for potential carry-over or radio interference suppression devices on isolating switches. In addition, reactive power compensation, particularly in the drive, is made possible and the alternating current therefore has lower values, which is why smaller cable diameters can then also be provided for the primary conductor and lower cabling costs can therefore be achieved. Circuit breakers are not required, since disconnection can be replaced by pulling out the primary conductor.

In particular, the primary conductor is laid and held stationary. Thus, only a single inductive transition is necessary. The drives enclose the primary conductor in a recess in such a way that they can be moved along the primary conductor.

In particular, holders for the primary conductor are provided in a stationary manner such that the drives can be moved past along the primary conductor.

In an alternative embodiment according to the invention, the movable part can be supplied with energy and/or information in a contactless manner, in particular inductively, by means of a rotary transmitter. Thus, the power transmission location to the movable part can be made at any axial position.

In particular, an electronics box is provided on the movable part. In addition, a primary conductor can be supplied from the movably arranged part of the rotary transmitter, from which the drives can each be supplied with energy and/or information in a contact-free manner by means of a secondary coil they comprise. In particular, the rotary transmitter has a primary winding in the stationary part and a secondary winding in the rotatably mounted part, in particular for supplying the primary conductor which is inductively coupled to the secondary coils of the drives and can also be rotated with the drives.

In an advantageous embodiment of the variant embodiment, the part is rotatably mounted or can be moved linearly. The advantage here is that the system can be designed as a rotary table or as a linear drive.

In an advantageous embodiment, the primary conductor supplies the drives in series. The advantage here is that no T-pieces are required and therefore very cost-effective cabling, in particular without connectors and the like, can be implemented.

In an advantageous embodiment, the primary conductor is supplied with energy in a contactless manner via stationary coil cores comprising at least one coil winding or via a conductor line. The advantage of non-contact transmission is that the movable part can be used in wet areas or aseptic areas and there is no wear.

In an advantageous embodiment, the primary conductor is laid as a closed loop. The advantage here is that it is particularly inexpensive and no beginning or end pieces are necessary.

In an advantageous embodiment, at least one drive comprises an electric motor and an electronic circuit for supplying power to the electric motor, with the drive being able to be supplied inductively. The advantage here is that the drive is sealed and can be implemented in a cost-effective manner with a high degree of protection. The fact that the drive is supplied without contact allows the housing to be designed simply and simply, in particular without bumps or connectors, thus allowing water to drain away and preventing solids from settling. In particular, it can therefore be used in wet areas and aseptic areas. The time required for cabling can be reduced with the invention.

In an advantageous embodiment, a primary conductor is provided on the drive in such a way that an inductive coupling with a secondary winding comprised by the drive can be provided. The advantage here is that no plug connector is required, which means that the wiring can be carried out quickly and easily. In addition, costs can be saved.

In an advantageous embodiment, at least one primary conductor is provided in a recess or a cable duct of the drive. The advantage here is that the laying of the cable can be carried out very quickly and easily and, in addition, casting with a casting compound can advantageously be carried out.

In an advantageous embodiment, at least one secondary winding is wound around a U-shaped and/or E-shaped core. The advantage here is that the design can be selected depending on the process used and the desired degree of efficiency.

In an advantageous embodiment, the primary conductors are at least partially encapsulated and/or protected by a cover. The advantage here is that a particularly high degree of protection can be achieved.

In an advantageous embodiment, the drive is tight, smooth on the outer surface and/or has a high degree of protection. The advantage here is that the drive can be provided in particular for use in wet areas and/or aseptic areas.

In an advantageous embodiment, the drive does not have a plug connector or other electrical connection devices on its exterior. In turn, it is advantageous that the drive can be designed to be sealed in a simple manner and have a high degree of protection.

Essential features of the drive for a system are that the housing of the drive is provided on a first side of the movable part, in particular the turntable or linear drive, and bearings of the output shaft, in particular the rotor shaft, are provided on a second side of the movable part, in particular on a device connected to the movable part. Advantageously, the drive can thus be implemented in a very compact manner.

In particular, a flange, in particular comprising a centering flange, is provided on the output side for connecting the drive to the movable part and/or to a device that can be connected to it. Thus, the drive can be relatively positioned very precisely.

Further advantages result from the dependent claims.

• In der 1 ist ein drehbar gelagerter Tisch, insbesondere Drehtisch 1, gezeigt, der Antriebe 2 umfasst zum Antreiben von Objekten. Die Antriebe 2 sind unterhalb des Drehtisches an diesem lösbar verbunden. Die Abtriebswelle ragt durch den Drehtisch 1 hindurch und ist an einer nicht gezeigten Vorrichtung über die beiden Lager 3 gelagert. Dabei ist diese Vorrichtung ebenfalls mit dem Drehtisch 1 verbunden. Abtriebsseitig kann die Abtriebswelle beispielsweise mit einem Teller verbunden sein, auf den Objekte, wie Werkstücke oder Güter, aufstellbar sind. Somit sind die Objekte drehbar. Ein Werkzeug, beispielsweise ein Ettiketierer oder Beschrifter, ist an einer Stelle am Umfang vorgesehen und kann das Objekt während dessen Drehung bearbeiten.

The invention will now be explained in more detail with reference to figures:

• In the 1 a rotatably mounted table, in particular a turntable 1, is shown, which includes drives 2 for driving objects. The drives 2 are detachably connected below the turntable on this. The output shaft protrudes through the turntable 1 and is mounted on a device, not shown, via the two bearings 3 . This device is also connected to the turntable 1 . On the output side, the output shaft can be connected to a plate, for example, on which objects, such as workpieces or goods, can be placed. Thus, the objects are rotatable. A tool, such as a labeler or annotator, is provided at a location on the perimeter and can manipulate the object as it rotates.

It is therefore important that bearings 3 of the output shaft of the drive are not supported within the housing of the drive, but on the other side of the rotary table 1. The drive can therefore be designed to be very compact.

The drive can be implemented, for example, as a direct drive, ie as an electric motor without a gear. It can therefore be made particularly compact and has a low moment of inertia.

In 3 the internal structure of the drive is indicated in more detail, with the output area being shown in an exploded manner. In 4 assembly is indicated schematically. The rotor shaft section 30 leads through a recess in the table top to that area which accommodates the bearings 3 . The rotor 31 is provided with permanent magnets provided in the vicinity of the stator 34 . The associated electric motor can also be designed with a high number of poles to generate a high torque.

Furthermore, a circuit board is provided within the housing 2, which includes electronic components, in particular with converter functionality. In addition, at least one secondary winding is provided around the U-shaped ferrite core 35 to supply the electronics on the circuit board 36 with energy and information. The secondary coil is inductively coupled to the primary conductor 4.

A feed feeds a medium-frequency alternating current that is as constant as possible into the primary conductor 4 . The advantage here is a frequency between 15 and 100 kHz.

The drive 2 can be connected to recesses of the turntable by means of the flange 32 and by means of screws, the screws being guided through the bores 33 and being screwed into threaded bores of the turntable.

The drive can be precisely positioned relative to the bearings by means of the centering flange 37 . The device for accommodating the bearings can therefore be equipped with a corresponding receptacle for the centering flange 37 and thus enables exact relative positioning.

In a further development, the long screws are not screwed into threaded bores in the rotary table, but rather passed through bores in the rotary table and screwed into threaded bores in the device for accommodating the bearings.

In 1 the feed is integrated in the power supply 5, which can also be equipped with control electronics.

is important at 1 that the primary conductor is stationary, ie not rotatable, and the drives with their U-shaped recess can be moved along the primary conductor 4. The recess resembles a slot.

In 2 an alternative embodiment is shown. Here, the primary conductor 23 is arranged on the movable part. The energy is transmitted from the stationary side to the movably arranged parts via a rotary transmitter. For this purpose, the rotary transmitter comprises a stationary part 21 and a rotatably mounted part 22, with the stationary part 21 comprising a primary coil and the other part 22 comprising a secondary coil.

In addition to the contactless transmitted energy, data can also be transmitted. An electronics box 20 for additional components is provided on the rotatable part, which contains additional electronic functions, with which signal-processing functions in particular can be implemented. The primary conductor 23 is guided from the rotary transmitter either directly or via the electronics box 20, in particular through the hollow shaft 23, to the turntable and laid there in a ring shape.

The drives are in turn coupled inductively as in 1 and intended for driving objects.

In further exemplary embodiments of the invention, the housing part comprises a core 35 with a U-shaped cross-section around which is wound a secondary winding which supplies the electronic circuit. The drive can therefore be supplied without contact using the inductive coupling and is therefore galvanically isolated from the primary circuit. Disconnecting power to the drive is quick and easy by unwinding or taking down the loop of the primary conductor.

The primary circuit is fed by a device which has current source behavior with regard to the primary current it generates.

In further exemplary embodiments according to the invention, information is transmitted to the primary conductor by modulation of higher-frequency signals, in that the electronic circuit comprises means for demodulating the signals. In order to exchange information, the electronic circuit also includes means for modulation, as a result of which signals can then also be modulated onto the primary conductor.

In this way, the drive can be supplied without contact. As a result, a new type of supply principle can be implemented in industrial plants and/or machines. Because when installing the drives, they no longer have to be electrically connected and wired with expensive plug connectors, but it is sufficient to wrap a primary conductor in the recess of the drive.

In addition, a high degree of protection can be achieved since there are no plug connectors and the drive can therefore be manufactured with its housing sealed in a cost-effective manner. The drive can thus be produced in particular with a smooth housing and can therefore be used in aseptic or wet areas.

Means for separating the potential and other separating devices can be saved since the housing wall thickness can be dimensioned accordingly and the inductive coupling can be easily separated.

The electronic circuit on the circuit board 36 naturally also includes the secondary-side means for the inductive, ie non-contact, energy transmission. In an advantageous embodiment, these means are advantageously passive components, ie capacitors and windings around coil cores. In the simplest version, the pick-up is wound with a winding as a secondary winding and a capacitor is connected downstream, the capacitance of which resonates with the inductance of the winding, the resonance frequency corresponding to the frequency of the alternating current in the primary conductor or deviating by no more than 10%.

The drives can be supplied in series with the primary conductor. Individual motors can be decoupled without having to interrupt the power supply to the others. It is only necessary for the primary conductor conductor loop to be loosened around the drive, for example by lifting the conductor loop out of the recess.

T-pieces are omitted in the wiring according to the invention.

The drive is drawn in the figures as a rotary drive. In other exemplary embodiments according to the invention, the drive is designed as a linear drive and is inductively supplied.

A significant advantage of the invention is that the system can be designed with a particularly high degree of protection and is easy to clean in wet areas or aseptic areas or in the food and beverages industry. In addition, the primary conductor can be installed easily and quickly, which means that the manufacturing costs and maintenance costs of the entire system can be reduced.

In particular, the primary conductor is laid in a closed path.

In further exemplary embodiments according to the invention, the primary conductor is wound around a drive several times instead of only being guided through the slot.

In other exemplary embodiments according to the invention, a linearly movable table is provided instead of the rotary table, under which the drives are positioned. The coil cores are then arranged along the movement path and supply the primary conductor, which is laid essentially linearly.

In advantageous embodiments, the method for contactless energy transmission and the associated components can advantageously be carried out in accordance with the specifications DE 100 53 373 A1 , DE 103 12 284 A1 , DE 103 12 792 B3 , DE 103 39 340 A1 , DE 103 38 852 A1 , DE 103 49 242 B3 , DE 103 44 144 A1 , DE 44 46 779 A1 or WO 92/017929 A1 disclosed features. The use of a medium frequency of about 15 to 100 kHz is particularly advantageous. The matching circuit following the pick-up, comprising the coil core, can be implemented particularly advantageously in a passive manner, that is to say without electronic power semiconductors.

Reference List

1

turntable

2

drive

3

warehouse

4

primary conductor

5

Power supply with control electronics

20

Electronic box for additional components

21

stationary part of the rotary joint

22

rotatably mounted part of the rotary transmitter

23

Hollow shaft with primary conductor

30

rotor shaft section

31

Rotor with permanent magnets

32

flange part

33

drilling

34

stator

35

U-shaped core

36

circuit board

37

centering flange

Claims (9)

System, wherein drives (2) are supplied without contact under a movable, rotatably mounted part, i.e. rotary table (1), by means of respective inductive coupling to one or more primary conductors (4), the housing of at least one drive (2) on a first side of the movable part is provided and a bearing (3) of the output shaft is provided on a second side of the movable part on a device connected to the movable part, with a flange (32) on the output side, which includes a centering flange (37), connecting the drive (2) to a device connected to the movable part, the movable part being supplied with energy and/or information by means of a rotary transmitter without contact and is supplied inductively, with an electronics box (20) being provided on the movable part, with at least one drive (2) comprising an electric motor and an electronic circuit for supplying the electric motor, with the drive (2) being supplied with inductive power, with a primary conductor (4 ) is provided on the drive (2) in such a way that there is an inductive coupling with a secondary coil comprised by the drive (2), with at least one primary conductor (4) being provided in a recess, indentation, slot or cable duct of the drive (2). , With the movably arranged part (22) of the rotary transmitter, a primary conductor (4) is supplied, from which the drives (2) each by means of one of ih The secondary coil that is included can be supplied with energy and/or information in a contact-free manner, with the rotary transmitter having a primary winding in the stationary part (21) and a secondary winding in the rotatably mounted part (22) for supplying the primary conductor ( which is inductively coupled to the secondary coils of the drives (2) 4), which can also be rotated with the drives (2), with the primary conductor (4) being routed from the rotary transmitter via the electronics box (20) through a hollow shaft (23) to the turntable (1) and laid there in a ring, with the primary conductor ( 4) the drives (2) supplied in series. plant after claim 1 wherein a drive (2) comprises at least one coil winding wound around a coil core and is supplied with energy without contact. System according to at least one of the preceding claims, in which the primary conductor (4) is laid as a closed loop. Plant according to at least one of the preceding claims, wherein at least one secondary winding is wound around a U-shaped (35) and/or E-shaped core. System according to at least one of the preceding claims, in which the primary conductors (4) are at least partially encapsulated and/or protected by means of a cover. System according to at least one of the preceding claims, wherein at least one drive (2) is sealed, smooth on the outer surface and/or has a high degree of protection. Plant according to at least one of the preceding claims, in which the drive (2) does not comprise a connector or other electrical connection devices on its exterior. System according to at least one of the preceding claims, in which the drive (2) is designed in such a way that information can be transmitted to the primary conductor (4) by modulation of higher-frequency signals. Drive for a plant according to at least one of the preceding claims, wherein the housing of the drive (2) is provided on a first side of the movable part and Bearings (3) of the output shaft are provided on a second side of the movable part, on a device which is connected to the movable part, wherein on the output side a flange (32) comprising a centering flange (37) connects the drive (2) to a device connected to the movable part, wherein the drive (2) comprises an electric motor and an electronic circuit for supplying the electric motor, the drive (2) being supplied inductively, a primary conductor (4) being arranged on the drive (2) in such a way that an inductive coupling is provided with a secondary coil comprised by the drive (2), wherein the primary conductor (4) is provided in a recess, indentation, slot or a cable duct of the drive (2), the primary conductor (4) supplying the drives (2) of the installation in series.

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