Coupling hook particularly for the lower arms of a three-point linkage of a tractor

摘要

The invention relates to a coupling hook, which is intended to attach an implement to a tractor by means of a coupling ball (11). The body (1), includes a housing (25) for a catch mechanism and a coupling throat (27) arranged to receive particularly the said coupling ball (11) and a catch (2) rotating in the housing (25) for locking the coupling ball (11) into the coupling throat (27). In the free position, the catch (2) can rotate, thus permitting the coupling ball (11) to rise out of the coupling throat (27). The catch (2) is operated by an operating lever (3). The catch (2) is arranged to return the operating lever (3) to the locking position, when the coupling ball (11) rotates it as it rises out of the coupling throat.