A semi-mounted plough has a rear chassis, the plough trailing behind a plough-towing tractor in a laterally pivotable or steerable manner by a vertically oriented joint. In order to compensate lateral pulling for the tractor, which is generated by the traction force of the plough about the vertical axis of the tractor, an energy accumulator is arranged, which generates a torque counteracting the lateral pulling.

The invention relates to a method for increasing the load on driving rear wheels (KB, KP) of a tractor during soil cultivation with a farm implement (2), in particular with a plough (20), attached to a three-point linkage (1) of the tractor, in which the vertical position of the attached implement (2, 20) is adjusted relative to the tractor by means of the position of the arms (4) of a lifting device and the length of the upper link (13) of the three-point linkage (1) of the tractor is adjusted. After adjusting the length of the upper link (13) of the three-point linkage of the tractor the axial force acting/induced in the upper link (13) is determined and during travel of the tractor continuously monitored and automatically maintained at the adjusted value, whereby also the adjusted vertical position of the implement (2) attached to the tractor is continuously monitored (2) and is also automatically maintained at the adjusted value, thereby maintaining the vertical position of the attached implement (3) in this regulation and thus also constant ploughing depth.

In addition, the invention relates to a device for performing the above-mentioned method for increasing the load on driving rear wheels of tractors during soil cultivation.

A rotary plow (1) with pivoting support wheel (2) for mounting on a plow frame (3). The pivoting support wheel (2) is suitable for plows projecting far behind, such as multi-plowbody mounted, reversible plows or semi-mounted reversible plows with a movable rear part. Furthermore, the pivoting support wheel (2) exhibits self-steering characteristics which have different support or steering forces which act on the pivoting support wheel (2) or the plow frame (3) through the pushed or forwardly-directed arrangement of the pivot arm, and thus enables an accurate lateral guidance of the plow.

The invention relates to a semi-mounted plough (1) having a rear chassis, said plough trailing behind a plough-towing tractor in a laterally pivotable or steerable manner by means of a vertically oriented joint. In order to compensate lateral pulling for the tractor, which is generated by the traction force of the plough about the vertical axis of the tractor, an energy accumulator (10) is arranged, which generates a torque counteracting the lateral pulling.

A swivelling support wheel for a reversible plough is proposed that is adjusted with a toothed segment and a catch and gives the working depth of the ploughing tools.

A device for automatically adjusting the working width of the first plough body of a plough in accordance with the variable working width of subsequent plough bodies. A first hydraulic cylinder displaces a rear frame section laterally. A second hydraulic cylinder pivots the rear frame section to adjust a transverse spacing of the plough bodies. The first hydraulic cylinder includes a multi-stage cylinder. A first cylinder stage forms a main lateral control, and a second cylinder stage forms an automatic working-width control for the first plough body. The second cylinder stage is in hydraulic-fluid communication with the second hydraulic cylinder in a master-slave configuration. The second cylinder stage is master or the slave depending on a moving direction of the cylinder stage and the second hydraulic cylinder being slave or the master. Piston diameters are matched to provide a correction of a lateral displacement of the front frame section.

The invention relates to a pivoting support wheel (2), which is aligned and pushed forwards, for a reversible plough (1), said wheel guiding the reversible plough into a determined working position and has self-guiding properties which prevent adverse lateral forces to the plough.