| 摘要 |
The stubble clearing implement has a chassis (1) carrying teeth (2), a roller (3) and the discs (7). It is drawn behind a tractor, by a three point towing hitch (4,5). The adjustment of the rear roller and the levelling discs, is realised by a pair of jacks (13). The jacks adjust the height of a parallelogram (11 - 12), linked to the roller and the discs and the chassis. The jacks operate through a lever (19), which rotates according to whether the stops (21,22) are in place or not. When the stops are withdrawn the lever rotates around an axis (20), moving the damper (23), which causes a rod (18) to rotate around the axis (26), to raise or lower the levelling discs.
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