| 摘要 |
<p>A system for snap locking the coupling parts (6) of a tractor implement to holding parts (2) of the tractor in response to the tractor being driven against these coupling parts (6). By the final driving phase of the tractor the coupling parts (6) are raised by cooperation with an inclined edge (10) on the holding parts (2), up to a maximum raised position, from which, in response to the very last motion of the tractor, they are lowered into holding engagement with respective notches (12) at the end of the inclined edge. Just prior to the very last tractor motion an upwardly directed pivot pawl plate (18) on the coupling part (6) is forced to be swung rearwardly by a frontal engagement with a locking nose portion (40, 42) on the holding part (2), but also to be released from this engagement in response to the final lowering of the coupling part (6), whereby the pawl plate (18), with snap action, pivots forwardly into a locking position underneath the locking nose (40,42) portion so as to be locked against being raised, by way of its engagement with the lower side (40) of the locking nose (40,42). Hereby the coupling part (6) will be effectively locked to the holding part (2), until the pawl (18) is manually swung into a spring stabilized released position. Upon the separation of the respective coupling and holding parts (6 and 2) the pawl members (18) may be swung back into their potential locking positions prior to the next coupling together of the said parts (6,2). <IMAGE></p> |
