| 摘要 |
The invention relates to a towable or semitowable sowing and fertilizing machine comprising a container structure 1; shares 2,3 connected to the container structure; a roller device 4 which has been divided at least into two parts 4A which have not been rigidly supported in relation one to the other; at least one hydraulic cylinder 6 for raising and lowering the container structure and shares connected thereto; and at least one load cylinder 7, which pushes down or pulls up the roller device at a certain point in order to achieve a uniform load over the entire width of the roller device. The said at least one hydraulic raising and lowering cylinder 6 has been coupled between the container structure 1 and a certain part 4A of the roller device, its range of motion, at least in the lowering direction, having been limited by means of a column of liquid which remains in this cylinder and which in terms of its height can be regulated by a valve system connected to the machine; and the load cylinder(s) 7 having been coupled to the side of raising and lowering cylinder(s) such that they operate at the pressure of the abovementioned column of liquid. <IMAGE> |
