| 摘要 |
PCT No. PCT/SE94/00931 Sec. 371 Date Jul. 3, 1996 Sec. 102(e) Date Jul. 3, 1996 PCT Filed Oct. 6, 1994 PCT Pub. No. WO95/10174 PCT Pub. Date Apr. 20, 1995A coupling device for a tractor provided with a three point hitch. The coupling device has a first coupling frame, and a second coupling frame, provided with at least an upper and two lower fastening links for hinged fastening of a tool, the first coupling frame being provided with a first coupling element in longitudinally and directionally variable rotation connection with the rotating shaft of the tractor. The second coupling frame is provided with a second coupling element being rotatably connectable with the first coupling element, to transfer the effect of the rotating shaft to the tool. The coupling frames are provided with cooperating upper and lower fastening elements. The upper fastening element of the first coupling frame consists of two fastening hooks turned from the tractor, provided at a spaced horizontal distance from each other symmetrically from the vertical symmetric axis of the coupling frame, converging upwards towards each other. The second coupling frame comprises an upper beam element in each end limited by downwardly directed limiting elements. The fastening hooks and the beam element are formed and provided in such a way that the fastening hooks can be brought, from below, to vertically and horizontally correct coupling with the horizontal beam element, even when the first and second coupling frames are somewhat mutually twisted in a plane perpendicular to the longitudinal direction of the tractor. |
