Such a vehicle is known.

The known vehicle is usually employed for cleaning the stable floor.

It is an objective of the invention to provide a multifunctional, unmanned vehicle.

In accordance with the invention, this is achieved in that the unmanned vehicle is connected to a hopper and/or comprises a hopper for the storage of material, such as e. g. sawdust or straw, and is provided with spreading means for spreading the material. As a result thereof the unmanned vehicle is capable of providing e. g. a cubicle in the stable with a layer of sawdust or straw or any other material which is suitable for covering the floor. According to an inventive feature, the spreading means comprise metering means for metering the material to be spread. With the aid of the metering means it is possible to spread a uniform layer of material over certain floor surface areas in the stable.

According to an embodiment of the invention, the spreading means comprise a ventilator for spreading the material by blowing. It is further possible for the spreading means to comprise a compressed air unit, so that the material is spread by means of compressed air. For the purpose of spreading such material uniformly over a specific surface area, according to an inventive feature the spreading means comprise a distribution mouthpiece. By means of the distribution mouthpiece it is also achieved that the spread pattern of the material is exactly defined. For the purpose of using the spreading means in a more flexible manner, according to an inventive feature, the spreading means are rotatably disposed on the unmanned vehicle.

According to again another inventive feature, the unmanned vehicle is provided with navigation means for guiding the unmanned vehicle through the stable. According to a further inventive feature, the unmanned vehicle is provided

with detection means for determining the surface area which is covered with the material to be spread. According to an aspect of the invention, the navigation means and/or detection means comprise a camera. However, it will be obvious that it is also possible for the navigation means to comprise, besides the camera, a radar or an ultrasonic sensor, for example. Other detection means than those already mentioned and alternative sensors may be used as well.

According to an inventive feature, the unmanned vehicle may also comprise a manure displacing device, such as e. g. a manure slide. By means of the manure displacing device it is possible first to clean the cubicle, after which the material to be spread is distributed over the cubicle floor.

The invention will now be explained in further detail with reference to the accompanying drawings.

Figure 1 is a side view of a first unmanned vehicle according to the invention, and Figure 2 is a side view of a second unmanned vehicle according to the invention.

Figure 1 shows a first embodiment of an unmanned vehicle 1 comprising a frame 2 with two wheels 3 disposed underneath, which wheels 3 are each individually drivable by means of an electric motor 4. On the frame 2 there is arranged a hopper 5 with a cover 6. The hopper 5 is designed as a conical one. In the hopper 5, near the lower side thereof, there are disposed spreading means 7 with the aid of which material stored in the hopper 5, such as sawdust or straw, can be spread over the stable floor. The spreading means 7 comprise a metering unit 8 which, in the present embodiment, is designed as a venturi. The spreading means 7 further comprise a compressed air unit 9 which is provided with a compressed air vessel 10 with a pipe 11 connected thereto. A (non-shown) valve enables air to flow from the compressed air vessel via the pipe 11 to the metering unit 8. The material to be spread can leave the metering unit 8 via a distribution

mouthpiece 12. The distribution mouthpiece 12 is provided with guide members 13 which are adjustable in such a manner that by means of these members the direction of the material to be spread is defined.

Apart from the fact that the unmanned vehicle 1 is supported by the wheels 3, a further support point is constituted by a manure displacing device 14. In the present embodiment, the manure displacing device 14 comprises e. g. a manure slide 15. The unmanned vehicle 1 is further provided with a rotatable guide/protective bracket 16.

Figure 2 shows a second embodiment of an unmanned vehicle 1, in which parts corresponding to those in the first embodiment are indicated by the same reference numerals. In the second embodiment of the invention the spreading means 7 comprise a metering unit 8 which is constituted by a cam wheel 17. The spreading means 7 further comprise a guide channel 18, to one end of which a ventilator 19 is connected. By means of the ventilator 19 it is possible to blow air into the guide channel 18. Via the cam wheel 17 material is brought from the hopper 5 into the guide channel 18. To the other end of the guide channel 18 there is connected an extension piece 20 whose end is provided with a distribution mouthpiece 12. The extension piece 20 can be pivoted upwards by means of a control cylinder 21, as shown in Figure 2.

Both in the first and second embodiment of the invention it is possible to rotate the spreading means 7 relative to the frame 2 with the aid of (non-shown) control means.