DE2729811A1 - COMPOSED BY A TRACTOR AND AN AGRICULTURAL-DRAWN IMPLEMENT - Google Patents

Description

Team consisting of a tractor and an agricultural

trailed work implement The invention relates to a team consisting of a tractor and one with this at least during use laterally offset to this with drawn agricultural implements Front attachments of excess width, in particular trailed combine harvesters, whereby the tractor is connected to the implement via a pull rod or the like, the one end on the tractor and the other end as well as an additional connecting link connected to the combine.

In practice, shleppe;, trailed combines are known to be over a drawbar connected to the tractor.

De the trailed combine harvesters usually have front attachments, which are wider than the combine harvester itself, the drawbar must be long enough that the tractor does not use the front attachments when changing the direction of travel of the pulled combine harvester collides. However, this has the consequence that the tractor driver very often has to look back at the attachments of the combine harvester in order to oversee the flawless operation of the attachments or the trailed combine harvester to be able to.

The present invention is therefore based on the problem of a team from a tractor and an agricultural towed machine in particular To form a combine harvester, in which the operation of the trailed combine harvester to a large extent is manageable without turning the driver's gaze. This task is done with a team of the type specified at the outset solved in that the additional connecting member depending on the position of the tractor in relation to the combine harvester adjustable in length is. In this way it is possible to have the tractor right next to the attachments to run along without the risk of the tractor changing direction collided with the attachments of the combine harvester. Consists in a simple way the connecting link from a hydraulic Eolben cylinder unit. Included It is advantageous that the piston-cylinder unit as a function of a target / actual comparison the angular positions of the tractor to the drawbar and of the combine harvester to the drawbar is adjustable in length.

According to a further essential feature of the invention is the respective extension length of the piston-cylinder unit via a control valve, preferably a solenoid valve adjustable, its impulses indirectly from two angle sensors E.g. rotary potentioxeter, one of which is the articulation point tractor drawbar and the other is located at the combine harvester drawbar pivot.

In the following, the invention is based on an exemplary embodiment and two of this schematically depicting figures are explained in more detail. Included shows: Fig. 1 a tractor and a trailed combine harvester driving straight ahead and FIG. 2 shows a tractor and a combine harvester during a change of direction in top view.

The single-axle combine harvester 2 running to the right of the tractor has a boom 3 to which a tie rod 4 is articulated so as to be pivotable about a vertical axis 5 is. The swiveling capacity is under the control of a hydraulic cylinder 6. The drawbar 4 is hinged to the trailer 7 or to the drawbar, located at the hinge point an angle transducer 8. This angle transducer is not shown in detail. It gives impulses to the control valve belonging to the hydraulic cylinder. Another Wintelawrnehmer 9 is arranged in the hinge point 10 for the target / actual comparison. juf these In this way, the required safety distance from the tractor is automatically established a. In the exemplary embodiment shown here, this kinematics only has to be used for right-hand bends become active, as there is no risk of collision when turning left. Through this inventive training of a team, it is possible to the tractor so to Arrange combine harvesters so that the tractor driver can turn without looking back to have to work perfectly the combine harvester with attachments of over width can control.

For road and transport trips, the drawbar offers in one 18n0 swiveled lockable position a central Mnlenkpunkt 11 for pulling the machine.

L e r s e i t e

Claims (5)

Claims 9 team consisting of a tractor and a with these drawn ones arranged laterally offset to it at least during use Agricultural implement with front attachments of excess width, whereby the tractor is connected to the implement via a pull rod or the like, the one end on the tractor and the other end as well as an additional connecting link is connected to the combine harvester, that is the additional link depending on the position of the tractor (1) for the combine harvester (2) is adjustable in length. 2.) Team according to claim 1, d a d u r c h g e k e n n z e i c h n e t that the connecting member is a piston-cylinder unit (6). 3.) Team according to one of claims 1 or 2, d a d u r c h g e it is not indicated that the piston-cylinder unit (6) is dependent on one Target / actual comparison of the angular positions of the tractor (1) to the drawbar (4) and of the combine harvester (2) to the pull rod (4) is variable in length. 4.) Team according to one or more of claims 1-3, d a d u It is noted that the respective extension length of the piston-cylinder unit (6) via a control valve, preferably a solenoid valve, which is his Impulse indirectly from two angle sensors z. B. Receives rotary potentiometer from one at the point of the tractor drawbar (5) and the other at the point of articulation Xäbdrescher pull rod (10) is arranged. 5.) Team according to one or more of claims 1 - 4 there through k e n n z ei without t that the drawbar (4) swiveled around 1800 lockable position a central pivot point (11) for pulling the machine in road and transport travel offers.