| 摘要 |
PCT No. PCT/SE87/00547 Sec. 371 Date Apr. 19, 1989 Sec. 102(e) Date Apr. 19, 1989 PCT Filed Nov. 20, 1987 PCT Pub. No. WO88/04134 PCT Pub. Date Jun. 16, 1988.An agricultural roller has two or more pivotably connected sections arranged side by side. A central frame has a towing bar pivotably connected to the central frame. The roller has roller sections (4, 6) on either side of the central frame (8) and transport wheels (15, 16), which are settable between an inactive position above the ground in the work position of the roller and a transport position where the roller means are lifted up from the ground and swung towards each other to achieve a small transport width. The two side sections (4, 6) situated closest the central frame (8) carry the transport wheels connected to the section frames, and between the sections there are pivot joints (17, 18) implemented such that the sections can adjust themselves to irregularities in the ground in the working position of the roller. A hydraulic cylinder (21) is arranged between the towing bar (2) and central frame (8), and can swing the central frame and the roller sections (4, 5, 6) connected thereto about 90 DEG about a pivoting axis transverse the driving direction to an 'on edge' or intermediate position, where the roller rests on the transport wheels (15, 16). By driving the tractor forwards the side sections (4, 6) are caused to swing towards each other into the transport position. |
