Device for transferring electrical energy from an agricultural work vehicle to an extension device which can be coupled onto the work vehicle

p0001The invention relates to a device for transmitting electrical energy from an agricultural working vehicle to a vehicle reversibly couplable to the working implement. The device comprises at least one work vehicle-mounted power electronics, at least one electric utility vehicle interface and at least one electrical Attachments interface. The power electronics can be supplied with electrical energy, which is generated by a generator and / or of a fuel cell of the work vehicle. The power electronics are electrically connectable to the generator and with the utility vehicle interface. The attachment has at least one attachment device interface and at least one electrical load. With the electrical load of the attachment of an agricultural working function is executable. At least one utility vehicle interface can be coupled with at least one attachment device interface, and here a part of the electric power on the utility vehicle interface to the attachment produced by the generator of the utility vehicle is at least transferable.

p0002An agricultural working vehicles such as forage harvesters, self-propelled sprayers and tractors are known from the prior art. A tractor is a versatile utility vehicle because different attachments can be connected to a tractor. Plows, harrows, cultivators, seed drills, sprayers, mowers and balers are coupled to a tractor regularly. Accordingly, a tractor leads to a respectively coupled attachment of diverse agricultural work functions. This also makes it necessary that the tractor drives the respective attachment accordingly, if the agricultural work function which is realized with the planting device is realized with an actuator, a tool or a motor. But also different harvesting attachments for a combine can be an attachment, which requires an individual control through the combine.

p0003There are attachments known whose actuators or tools are mechanically driven, with mechanical drive power is transmitted from a provided on the tractor PTO to the implement. An example of such an attachment is a round baler. Furthermore implements are known which are hydraulically driven. For this purpose, hydraulic quick couplers are provided on the tractor, which are connected with hoses of the attachment. Such attachment is for example a front loader or a trailed sprayer. When front loading the control or operation of the boom is hydraulic. When drawn syringe the linkage is adjusted hydraulically.

p0004Both the mechanical and the hydraulic transmission of power between the working vehicle and the implement creates problems when driving with him. So it is necessary, inter alia, that the engine of the utility vehicle is driven at a certain speed and / or that the transmission has a certain, predetermined ratio, so that on the PTO driven attachments can be operated as intended. This may be a poor efficiency of the team, consisting of working vehicle and the implement, result.

p0005There are known attachments, which have electrical consumers. These are electric motors and / or fan of relatively low power class. Furthermore, illumination devices and / or electromagnets can be operated as electric actuators. These are used to be supplied from the electrical system of the utility vehicle. For this purpose, the electrical energy required is generated by the conventional light engine of the work vehicle. No attachments with electrical loads or electrical consumers have hitherto been used, which have a greater power to run an agricultural working function.

p0006From the <patcit id="pcit0001" dnum="EP1306955A2"><text>EP 1306955 A2</text></patcit> is known a mobile high-voltage network of a work vehicle for providing DC voltage with high power for an attachment. Here, only DC on the attachment interface of the utility vehicle or the attachment is transmitted. Hereby, however, problems due to corrosion and the formation of electric arcs are connected.

p0007From the <patcit id="pcit0002" dnum="WO20061437A1"><text>WO 2006/1437 A1</text></patcit> discloses an interface device for transmitting electrical energy between a work vehicle and a work vehicle can be coupled to the attachment. The interface device is associated with a measuring device and / or an adjusting device. With the measuring device at least one electrical state variable of the electrical energy transmitted is quantified. With the actuator at least one electrical state variable of the electrical energy transmitted is changed. Specifically, with the actuator, the voltage and / or current of the electrical energy transmitted be increased or reduced, or the interface device is de-energized.

p0008The present invention is therefore based on the object to provide a device of the type mentioned and further, by which the aforementioned problems are overcome. In particular should be possible with the device, an electrical supply of a work vehicle can be coupled to the attachment, whereby the controllability is to be more flexible in the operation of the implement or improved, and the efficiency is increased.

p0009The object is solved by the teaching of claim 1. Further advantageous embodiments and developments of the invention will become apparent from the dependent claims.

p0010According to the invention a device of the initially mentioned type is characterized in that the power electronics is adapted to provide the required for the electric load of the respective attachment of current available, and that at least two different types of current from the power electronics are adjustable available.

p0011According to a concept for the electrical supply of the agricultural working vehicle and / or the attachment is proposed. Here, the attachment to an electrical load and an electrical consumer with which or with which an agricultural working function can be performed. It is expected that different implements different nature electrical loads or loads have, which are to supply electric power respectively to different species and in different power classes from working vehicle. For this purpose, the inventive concept provides to provide the electrical energy to the working vehicle or to produce. Furthermore, the work vehicle has at least one power electronics, with which the electric energy generated by the source of electrical energy required in the currently coupled to the utility vehicle of the attachment is convertible. This Productivity also be coupled to the utility vehicle and electrically operated advantageously. The attachments themselves can be easily configured and need not be equipped with its own power electronics components. This redundancy and reduced costs. The apparatus for transmitting electrical energy is flexible and reconfigurable if another implement is coupled or connected to the working vehicle. Advantageously, further comprising a safe and reliable operation is possible because the power electronics is an integral part of the work vehicle. This results in an overall improved efficiency of the team, consisting of agricultural work vehicle and a coupled implement, since, for example, no forced coupling of the speed of the engine is required with the intended mode of attachment. In that regard, can be realized with the electrical supply concept according to the invention a flexible and optimized on predetermined objectives actuation strategy. For example, the working vehicle and the implement can be so driven or operated so that the fuel consumption of the internal combustion engine is minimized. Also, the team can be controlled such that the work steps to be performed time-optimized, so there running as fast as possible. With appropriate power electronics, the power flow of electrical energy between the working vehicle and the implement can be controlled flexibly within certain limits.

p0012Possible type of current AC, mixed flow and / or DC power can be provided. As AC could be envisaged three-phase or single- or multi-phase alternating current. In this context, can be changed by the power electronics and provided via the electrical interfaces are available as of current or voltage and a sawtooth or square-wave pulses or voltage pulses. The square-wave pulses may be predetermined or variable pulse widths and / or pulse frequencies and / or pulse spacings.

p0013According to a preferred embodiment, the working vehicle to a DC intermediate circuit and an active or passive rectifier. The electrical energy produced by the generator is connected to the rectifier to the DC voltage intermediate circuit can be fed. The at least one power electronics is electrically supplied from the DC voltage intermediate circuit. Since the generator is usually driven mechanically by the internal combustion engine of the working vehicle and is thus operated with a ligand dependent from the engine speed, the first AC voltage produced by the generator has a dependent on the rotational speed of the engine frequency. By rectifying the electric power generated by the generator is independent of speed fed to the DC intermediate circuit, wherein the power electronics unit converts the DC voltage to the required by the attachment of current and the electrical load of the attachment provides.

p0014Particularly preferably, the power electronics a U mrichter on, which is operable to at least two different types of current convertible. Thus it can be driven in such example, the inverter that this the implement a fixed, standardized voltage or frequency provides, for example, 480 V is another attachment coupled at 60 Hz. If, on the working vehicle, can the same inverter, a standardized, fixed rectangular voltage , for example, with 400 Hz, converted. Basically, the inverter can make the attachment and DC power are available, if even - less preferred - for the reasons mentioned above.

p0015Very particular preference is for the transmission of electric power at least two, preferably four, the utility vehicle interface and / or the Attachments interface associated electrical wiring provided. Over at least one of the wiring different current types are transferable. This lead compounds which can be prepared by appropriate line contacts of the two electrical interfaces, the different types of electricity transmitted. Accordingly, two, three or four line connections can be actively involved in the power transmission between the working vehicle and the implement, depending on the type of power the respective attachment needed for operation.

p0016According to a particularly preferred embodiment, the utility vehicle interface and / or the attachment device interface to electrical line connections, which are combined to form at least one connector. Such a connector may be working on the vehicle side is formed into a socket and AttAcHmENts side in the form of a plug. Plug and outlet are substantially formed complementary to each other. Preferably, the utility vehicle interface and / or the Attachments interface has two connectors. Preferably, a connector comprises four line contacts, which can be used in a power transmission than three phases and a neutral conductor. The line contacts of a connector are electrically connected to the electric power transmitting line connections.

p0017The combined into a work vehicle-side connector, electrical line contacts can be electrically connected via line connections to the power electronics, especially if the power electronics is in the form of an inverter. This supplies the power electronics to a connector with the required type of current.

p0018A connector of the Attachments interface may be electrically connected to an electrical load or a partial circuit of the attachment. Accordingly, the electric load or a partial circuit of the implement over the connector from the power electronics of the working vehicle is supplied with electric current of the required type.

p0019According to a particularly preferred embodiment, the working vehicle on two power electronics. The utility vehicle interface has two connectors. Each power electronics is electrically connected to one connector. Accordingly, an electrical load of the attachment via a connector (the working vehicle and the implement) with a power electronics of the work vehicle and a second electrical load of the attachment on the connector with the other power electronics of the working vehicle can be connected. This can be operated independently of one another, the two electrical loads, which is advantageous with a left-right allocation of agricultural labor functions in agricultural implements.

p0020The proposed concept allows different operating conditions during operation of the utility vehicle or the attachment, which hereinafter - listed - not exhaustive.

p0021Thus, a first operating state is provided in which a connector is activated for the power transmission and in which a connector is disabled. Here, then, only one connector of the utility vehicle is connected to a connector of the attachment. The other connector of the utility vehicle is connected to any other connectors of the attachment. This mode is particularly useful for an implement with only an electrical load on the application.

p0022According to a second operating state, two connectors of the working vehicle are enabled to transmit power, wherein the two connectors are electrically connected with two connectors of the attachment. This mode is particularly useful if two identical or different electrical loads of the implement have to be supplied. Then may be connected to each connector in each case an electrical load of the attachment of identical or substantially different power consumption.

p0023In a third operating state of two connectors of the working vehicle are enabled to transmit power. The two connectors on the transmitted electric power is an electrical load parallelization provided, whereby an electrical load twice the maximum power can be made available, which can be transmitted via a plug connector.

p0024In a fourth mode, the two power electronics are operated such that the implement three phases and a neutral conductor, ie 4 line connections, are made available. To this end, the two power electronics can be used together, which is provided with a power electronics the three phases of the three-phase current and the other power electronics, switched neutral available.

p0025Since the operating conditions described with the device for transmitting electrical energy according to the invention can be realized, advantageously a reconfigurable and flexible system for operating at least one attachment is formed on a work vehicle.

p0026To automate the selection of each adjusted operating state, at least one means may be provided with lockable which to set which operating status or the type of power to provide the growing device. Such means may be in the form of a mechanical component of the cultivation device interface and the utility vehicle interface. A sensor may be provided, with which the mechanical component can be detected. For example, with a connector, preferably from zero to four, control pins can be provided with which implements identification information is coded and transferable.

p0027Particularly preferably, the means to a communication network with which an electrical load or a control device of the attachment to a control device of the utility vehicle and / or a control device of the power electronics information for selecting the adjusted operating state or to be provided to end of current are interchangeable. The agent may also be a part of the communication network. Such a communication network may be based on a CAN bus or an Ethernet data network.

p0028Alternatively or additionally, the means comprise a laid down on the mounting device interface transponder. The agent has a provided on the utility vehicle interface for reading and / or writing device on a transponder. This can be identified without contact and without mechanical coding means a coupled to the utility vehicle attachment.

p0029According to a particularly preferred embodiment, the utility vehicle interface on two connectors. Now there are different ways of connectors Attachments interface with the two connectors of the utility vehicle interface to connect. The following are the most common ways are listed.

p0030At the utility vehicle interface a cultivation device interface is coupled, which has only one connector. Accordingly, these connectors are connected only activated. The other connector of the utility vehicle interface is electrically disabled and to external environmental influences sealed or covered.

p0031The Attachments interface may be in the form of a double connector and have two connectors. Accordingly, the two connectors of the attachment device interface with the two connectors of the utility vehicle interface are electrically connected and activated during operation of the implement.

p0032It is also possible to couple two single Attachments interface to the utility vehicle interface, each attachment device interface having a respective connector. In other words, it is in such an attachment unit interface respectively to a single connector.

p0033Not least for safety point of at least one monitoring means is preferably adapted and configured in accordance with which at least the listed below conditions can be monitored.

p0034So should be monitored if a cultivation device interface is connected completely or incompletely to the utility vehicle interface. If the two interfaces are connected incompletely, to the utility vehicle interface subject to stress.

p0035If the Attachments interface to be separated from the utility vehicle interface, to a correspondingly designed monitoring means detect this and switch the utility vehicle interface tension.

p0036Further, the monitoring means should be able to determine whether an electrical insulation of the electrical components is given or not. If it is determined that there is no isolation or that a sufficient insulation of the electrical components is present, a warning the driver and / or a shutdown of the device for transferring the electric energy can be carried out.

p0037The monitoring means may be integrated in a communication network, and alternatively or additionally integrated into the components of the connector or the utility vehicle interface and / or attachments interface.

p0038Particularly preferably a control means is provided with which at least one electrical load of the attachment be controlled and / or regulated. This control device may be provided on the utility vehicle and consider directly measured variables of the utility vehicle. Such metrics can be the vehicle speed above the ground, the speed of the engine and / or the currently present slip a designed in the form of a tractor working vehicle. The control device controls in particular the at least one power electronics of the working vehicle.

p0039It can thus be driven with the control means controls the electric load of an attachment with a predetermined and substantially fixed voltage and / or constant frequency. Usual indicators of this are, for example, 400 V, 50 Hz or 480 V, 60 Hz - with or without neutral - or a square wave of 400 Hz and / or 15 kHz.

p0040The electrical load of an attachment can be controlled with a predetermined variable voltage and / or predetermined variable frequency from the work vehicle and / or regulated. With such control, the electric load of the attachment can be operated in dependence on the speed of the working vehicle. When a tractor which corresponds to an operating mode of a mechanically operated attachment at a rate dependent on the speed of the work vehicle PTO speed, a so-called ground speed. Additionally or alternatively, may be controlled and / or regulated electrical load of the attachment with a predetermined variable voltage from the attachment of. Thus, the attachment may have an operation mode in which the implement, the energy needed may request from the working vehicle to operate.

p0041There can be provided a communication network for data transmission, via which a control device of the attachment can be identified and or controllable. Such a communication network can be used, among other things, to configure a power electronics or a converter of the work vehicle. Also, data may be transmitted via such a communication network which are used for driving and for controlling the at least one electrical load of the attachment. Such a communication network may include a CAN-bus or Ethernet, in particular a real-time Ethernet data network comprise.

p0042Thus, a very high efficiency of the utility vehicle and / or the attachment is achieved, a control circuit may be provided, which has the power electronics of the utility vehicle and / or a controller. The control loop can communicate with sensors and / or controllers of the utility vehicle and / or the attachment and having a communication network for data transmission. With this loop, for example, the above-mentioned pulse width and / or pulse frequency and / or amplitude of a square wave voltage can be regulated. Thus, for example be provided that the control device of the working vehicle communicates via the communication network directly with sensors of the attachment and function of the detected from the respective sensors sizes the power electronics of the working vehicle controls such that the electrical consumers of the implement to be supplied directly to electrical energy, without a further control means is provided on the attachment.

p0043The network may include a CAN bus and / or an Ethernet data network, preferably a realtime Ethernet data network comprise. As with an Ethernet data network and in particular a real-time Ethernet data network a higher data transfer rate than with a CAN bus is possible, a system based on an Ethernet network data network is preferably used.

p0044Specifically, the working vehicle to a mounting interface, which enables attachment to the utility vehicle is reversibly coupled. This may be a conventional three-point implement mounting to act a drawbar or by any other mechanical coupling, which is common in agricultural work vehicles and / or attachments, and in particular on tractors.

p0045According to a preferred embodiment of the present invention, an agricultural work vehicle to a device for transmitting electrical energy from the utility vehicle on a can be coupled to the utility vehicle attachment. The work vehicle comprises a generator, at least one electric utility vehicle interface and at least one power electronics. With the generator electric power can be generated. The power electronics are electrically connected to the generator and with the utility vehicle interface. The attachment has at least one attachment device interface and an electrical load. With the electrical load of the attachment of an agricultural working function is executable. At least one utility vehicle interface can be coupled with at least one attachment device interface and here a part of the electrical energy produced by the generator of the working vehicle to the attachment is at least transferable. The power electronics are designed to provide the required for the electrical load of the respective attachment of current available. At least two different types of electricity are the power electronics available adjustable. In other words, according to this embodiment defined agricultural working vehicle with the necessary electrical components is provided, which are required to operate different attachments with at least one electrical load to carry at least one agricultural working function. In particular, this work vehicle, the necessary electrical infrastructure and at least one utility vehicle interface available, to which an attachment unit interface of the attachment can be connected.

p0046According to a preferred embodiment of the present invention, an agricultural implement comprising a device for transmitting electrical energy from an agricultural working vehicle to be coupled to the working vehicle attachment. The attachment has at least one attachment device interface and at least one electrical load. With the load at least one electrical an agricultural working function is executable. At least one utility vehicle interface of the utility vehicle can be coupled to the at least one attachment device interface and here a part of the electrical energy produced by the generator of the working vehicle to the attachment is at least transferable. The work vehicle has at least one power electronics, which is designed to provide the required for the electrical load of the respective attachment of current available. At least two different types of electricity are the power electronics available adjustable. The agricultural implement as defined in accordance with this embodiment is thus configured to couple to the embodiment of the agricultural work vehicle described above. After the cultivation device interface coupled to the utility vehicle interface, the attachment with electrical energy can be supplied, which is provided by the work vehicle in the time required for the attachment of current available.

p0047There are various possibilities for embodying and developing the teaching of the present invention advantageously. On the one hand is subordinate to the claims claim 1 claims and also to refer to the following explanation of the preferred embodiments of the invention based on the drawings. preferred embodiments and developments of the teaching are described in conjunction with the description of the preferred embodiments of the invention with reference to the drawings in general. In the drawings, each showing a schematic representation:<dl id="dl0001"><dt>Fig. 1</dt><dd>an embodiment of a device for transmitting electrical energy from an agricultural utility vehicle on a coupled to the utility vehicle attachment,</dd><dt>FIGS. 2-4</dt><dd>a utility vehicle interface to which each have a different attachment device interface is coupled.</dd></dl>

p0048Identical or similar parts are designated in the figures with the same reference numerals.

p0049<figref idrefs="f0001">Fig. 1</figref> shows an agricultural work vehicle 10, which is in the form of a tractor. In the following, the tractor is also referred to by the reference numeral 10th The tractor 10 includes an internal combustion engine 12. on the one hand by the output shaft 14 of the engine 12 of the traveling drive of the tractor 10 via a in<figref idrefs="f0001">Fig. 1</figref> not shown gear driven. On the other hand drives the output shaft 14 to the generator 16 at. The generator 16 is permanently installed on the tractor 10th Concretely, the generator 16 is formed in the form of a crankshaft generator and mounted with its stator on the motor housing and by its rotor to the flywheel of the engine 12th The generator 16 generates three-phase alternating current which is converted via the converter 18 of the generator 16 and a rectifier contained therein into direct current. The direct current is fed into the direct voltage intermediate circuit 20 of the tractor 10th The voltage of the DC voltage intermediate circuit 20 is approximately 700 V. only schematically is indicated that over the branches 22 of the DC voltage intermediate circuit 20 more in<figref idrefs="f0001">Fig. 1</figref> electrical load not shown is provided.

p0050The tractor 10 has a mechanical mounting interface 24 which may be formed in the form of a three-point implement cultivation, a drawbar and / or other conventional coupling system. To the mounting interface 24 of the tractor 10, the attachment 26 is coupled via the mechanical connection 28th The attachment 26 comprises, among other things on an agricultural working function exerted or driven by an electric motor 30th The electric motor 30 of the attachment 26 is supplied from the electric supply system of the tractor 10 with electrical energy. For this purpose, the attachment 26 via electrical lead 32 and the attachment device interface 34 of the implement 26 is connected to the utility vehicle interface 36 of the tractor 10th The utility vehicle interface 36 in turn is electrically connected to the inverter 38 formed in the form of a power electronics. The inverter 38 converts the direct current of the direct voltage intermediate circuit 20 into alternating current. The AC voltage is in a range of about 400 V to 480 V. The converted by the inverter 38 alternating current is supplied via the line 32 to the transformer 40th Accordingly, the transformer 40 on the primary side supplied with an alternating voltage of 400 V to 480 V. The transformer 40 is provided on the attachment 26 and there is fixedly mounted in a housing 42nd In that regard, the transformer 40 and the housing 42 constitute a structural unit.

p0051The transformer 40 converts the primary-side AC voltage of 400 V to 480 V in a secondary-side alternating voltage of 200 V to 240 V. Therefore, the electric motor 30 and ultimately the agricultural working function driven by this AC voltage. To the transformer 40 a rectifier 44 is connected, which is generated from the secondary-side alternating voltage DC voltage and this one at the attachment 26 adaptable electrical load (not shown as not adapted to the attachment 26) via a socket 46 will provide. Furthermore, a three-phase outlet 48 is provided, via which an electrical load can be connected (in<figref idrefs="f0001">Fig. 1</figref> not shown) which is operated with alternating current. In that regard, the attachment 26, an electrical distribution system, can be used with which electric current to multiple electrical loads, including the fixed to the attachment 26 installed electric motor 30 provided, available.

p0052The work vehicle 10 includes a controller 50, with which the inverters 18 and 38 are controlled. The control unit 52 of the engine 12 controls the engine 12 in response to operator input and is connected via the data line 54 of the communication network to the control device 50th Similarly, the inverters 18, 38 via the data lines 56, 58 connected to the control device 50th The data line 60 connects the controller 50 to the utility vehicle interface 36. The vehicle speed sensor 62 is connected via data line 64 to the control device 50th The attachment 26 comprises a control device 66 which is connected via data line 68 to the mounting device interface 34th With the sensor 70 of the attachment 26 a AttAcHmENts specific measure is detectable. The sensor 70 is connected via data line 72 to the control device 66th The electric motor 30 is connected via data line 73 to the control unit 66th The data lines 60, 68 between the control devices 50, 66 and the other data lines 54, 56, 58, 64, 72, which connect the respective components with the controller 50, 66, forming the communication network of the vehicle combination consisting of work vehicle 10 and attachment 26 . via the data line 54 can, in particular, the control unit 52 transmit the currently present rotational speed of the internal combustion engine 12 of the controller 50. Further, the detected by the vehicle speed sensor 62 vehicle speed is transmitted over the data line 64 of the control device 50th The 70 detected by sensor mounted implement specific measure as well as the currently present operating state of the electric motor 30 is transmitted via the data lines 72 and 73 of the controller 66 of the attachment 26th The controller 66 communicates over the data lines 60, 68 to the control device 50 in connection, via which the 26 required measuring and control variables to be exchanged for the actuation of the electric motor 30 of the attachment.

p0053Via the communication network information of the electric motor 30 and the controller 66 of the attachment 26 to the control device 50 of the work vehicle 10 are interchangeable. In that regard, can be directly identified on the basis of the data exchanged, the attachment 26 when the attachment unit interface 34 is connected to the utility vehicle interface 36th Also, a control loop is provided, which measurement and control data between the control device 50 of the work vehicle 10 for driving the inverter 38, and with further sensors 62, 70 and controllers 52 of the implement 26 and the work vehicle 10 exchanges. The communication network is based on an Ethernet data network, namely, a real-time Ethernet derivative.

p0054In the <figref idrefs="f0002 f0003 f0004">FIGS. 2-4</figref> are each a utility vehicle interface 36 of the utility vehicle 10 from <figref idrefs="f0001">Fig. 1</figref> shown, which are connected to two power electronics of the working vehicle tenth Not all components of the utility vehicle 10 from<figref idrefs="f0001">Fig. 1</figref> are in the <figref idrefs="f0002 f0003 f0004">FIGS. 2-4</figref> shown. With the parting line 75 is indicated, which components are associated with the work vehicle 10 (shown on the left side) and which components are associated with the attachment 26 (shown on the right side). The power electronics is the inverter 38 and the other power electronics of the converter 74. The two converters 38, 74 are connected electrically parallel to the DC voltage intermediate circuit 22 and are supplied by the DC voltage intermediate circuit 20 with DC voltage. The two converters 38, 74 are driven by the control device 50th

p0055For transmitting the electrical power 16 generated by the generator to an attachment four electrical line connections are provided in both the utility vehicle interface 36 as well as a growing device interface 34th Working vehicle side, these are the line connections 76 to 82. Attachments side are the line connections 84 to 90. The line connections 82, 90 have the function of a neutral conductor for. The line connections 76 to 80 and 84 to 88 are used for transmitting electrical energy between work vehicle 10 and attachment 26th The line connections 76 to 82 are summarized work on the vehicle side, respectively to a connector 92nd Attachments side the lead compounds are combined 84 to 90 respectively to a connector 94th The two connectors 92 are formed in the form of a socket and arranged in a housing of the utility vehicle interface 36th One connector 92 is electrically connected directly to the inverter 38th The other connector 92 is electrically connected directly to the inverter 74th

p0056The two connectors 94 of the attachment device interface 34 from <figref idrefs="f0002">FIG. 2</figref> are in the form of a plug complementary to said sockets or connectors 92nd The line connections 84 to 88 of each connector 94 are in AttAcHmENts side each with a<figref idrefs="f0002">FIG. 2</figref> no electric load shown the attachment 26 electrically connected. The four line contacts 96 of each connector 92 and 94 are each electrically connected to the wiring 76 to 82 or 84 to 90 and ultimately post produce the electrical contact between connectors 92 and 94 and the corresponding line connections as soon as the utility vehicle interface 36 the attachment unit interface 34 is electrically coupled. In the embodiment according to<figref idrefs="f0002">FIG. 2</figref> are electrically connected to the two connectors 92 of the utility vehicle 10 with the two connectors 94 of the attachment 26, and thus both connectors are enabled.

p0057<figref idrefs="f0003">Fig. 3</figref> shows to <figref idrefs="f0002">FIG. 2</figref> similar embodiment as far as the side of the working vehicle tenth Attachments side are two attachments interfaces 34, 98 are provided, which are coupled together on the utility vehicle interface 36th The Attachments interface 34 and the connector 94 are connected to an opening formed in the form of an electric motor electric load 102nd The cultivation device interface 98 with the plug connector 100 is connected to another, likewise constructed in the form of an electric motor electric load 104th Thus, the electric load is driven by the converter 38102 via the electrical interfaces 34, 36 and supplied with electric power. The electrical load 104 is controlled via the electrical interfaces 36, 98 of the inverter 74 and supplied with electrical power regardless of the currently present electric supply of the electric load 102 by the inverter 38th

p0058<figref idrefs="f0004">Fig. 4</figref> shows to <figref idrefs="f0003">Fig. 3</figref> comparable embodiment. However, only an attachment unit interface 34 is provided AttAcHmENts other. Another Attachments interface is coupled to the utility vehicle interface 36th Accordingly, only the connectors 92, 94 electrically coupled together and active. The connector 94 is connected to the electrical load 102, which is thus driven by the inverter 74 and supplied with electric power. The associated with any attachments interface upper connector 92 of the utility vehicle interface 36 is protected by a cover flap 110 against external environmental influences.

p0059In the <figref idrefs="f0002 f0003 f0004">FIGS. 2-4</figref> connect the data lines 60, 106, the controller 50 with the utility vehicle interface 36. Here, the data line 60 to the upper connector 92 and the data line 106 to the lower connector 92 of the utility vehicle interface 36 - assigned - also regarding Ansteuer- or evaluation logic. In the<figref idrefs="f0002">FIG. 2</figref> and <figref idrefs="f0003">3</figref> connect the data lines 68, 108, the attachment unit interface 34 with the (in <figref idrefs="f0002">FIG. 2</figref> not shown) of control device 66. In particular, the data lines 60, 106 and 68, 108 are used to build the communication network between the work vehicle 10 and the attachment 26. In particular, <figref idrefs="f0004">Fig. 4</figref> is inferred that 34 are connected to the utility vehicle interface 36, only the data lines 106, 108 by the coupling of the mounting device interface. Accordingly, only over the data lines 106, 108 a data link between the two control devices 50 can be constructed 66th Depending on the identification of the control device 66 in the control device 50 only the data line 106 is associated with lower connector 92 is activated. As at the upper connector 92 of the utility vehicle interface 36 associated data line 60 no corresponding labor-board data cable is connected, the upper connector 92 is disabled and thus switched off.

p0060On the Attachments interface 34 from the <figref idrefs="f0002 f0003 f0004">FIGS. 2-4</figref> are designated by the reference numeral 112 and RID transponder tags (Radio Frequency Identification tags) in. This transponder 112 can be read with the reading and / or writing device 114 without contact and at a distance of up to 30 cm (depending on the type used, the transponder) and / or described. In a transponder 112 AttAcHmENts specific data are stored, containing operating parameters and other information about the operation of the attachment 26th The reading and / or writing device 114 is connected via the data line 116 to the controller 50th Once a provided with a transponder 112 Attachments interface 34, the utility vehicle interface approaching 36, this is detected by the reading and / or writing device 114 and transmitted via the data line 116 of the controller 50th Based on this information, a control logic based, according to which the utility vehicle interface 36 is then de-energized, if no transponder from the reader and / or control device is detected 114th If the reading and / or writing device 114 detects a transponder 112, but no data connection 60, 68 and / or 106, 108 can be detected between the two control devices 50, 66, the utility vehicle interface 36 or the corresponding connector 92 is also de-energized , Only when the reading and / or writing device 114 detects at least one transponder and for each of the proposed AttAcHmENts side connector and a corresponding data line connection is detected, the interconnected connectors are supplied with current for transmitting electrical energy between work vehicle 10 and attachment 26th In this way, a monitoring means is constituted, with which it can be determined whether the two interfaces 34, 36 are effectively electrically connected together.

p0061Finally, it is particularly pointed out that the above-discussed embodiments serve merely to describe the teaching claimed, but do not limit to the embodiments.