| 摘要 |
The invention relates to a coupling hook particularly for the lower arms of a three-point linkage of a tractor, which is intended to attach an implement to a tractor by means of a coupling ball (11) or similar. The coupling hook includes a body (1), in which there is a housing (25) and a coupling jaw (27) and a catch (2) moving linearly in guides (13, 23) of housing (25) and opening at a downward angle. In addition, the coupling hook includes a spring (8) pressing catch (2) into the retaining position and an operating lever (3) for moving catch (2). According to the invention, operating lever (3) operating the coupling hook from above, is connected to catch (2) by means of a pull-turning device (26). Pull-turning device (26) is arranged to turn the operating lever's (3) pulling movement, which is directed essentially upwards, into a movement of the catch (2) from the retaining position to the open position. |
