Patent ID: 6218737
Filing Date: 2001-04-17
Classification: A01B

Abstract:
A device for setting the length of a top link of an attaching device of a tractor, the attaching device, apart from the top link, comprising:a top link;two lower steering arms;a power drive coupled with said top link for providing length settings of said top link;a displacement sensor for generating an electric actual length signal which represents the respective actual length setting of the top link;a lift position sensor for generating an electric signal representing the actual lift position of the lower steering arms;a storage unit for storing a nominal length setting of the top link, said nominal length setting relates to the respective actual lift position, and the respective nominal length settings can be stored in the storage unit relative to the associated lift positions in the form of a curve, and when a new actual lift position is reached, said storage unit generates an electric control signal corresponding to the nominal length setting of the top link; anda control unit including a comparator comparing the control signal with the actual length signal and actuating the power drive as a function of the deviation of the respective actual length signal from the control signal.