| 摘要 |
<p>The present invention concerns a haymaking machine comprising a chassis (2) supported on the ground by wheels (6) and a working device (11) linked to the chassis (2), the chassis (2) comprising a coupling device (4) to which two coupling parts (18a, 18b) are hinged, each carrying a journal (17a, 17b) for coupling to the respective lower arms of a tractor (5), each coupling part (18a, 18b) engaging with a respective return device (21a, 21b), each return device (21a, 21b) storing energy when the corresponding journal (17a, 17b) moves, relative to the coupling device (4), upwards from a first position, and each return device (21a, 21b) being able to restore this energy to the corresponding journal (17a, 17b) by bringing the journal (17a, 17b) back to the first position. The invention is remarkable in that each return device (21a, 21b) stores energy when the corresponding journal (17a, 17b) moves, relative to the coupling device (4), downwards from a second position, and each return device (21a, 21b) can restore this energy to the corresponding journal (17a, 17b) by bringing the journal (17a, 17b) back to the second position.</p> |
