CONTROL DEVICE FOR CRANE

Disclosed is a control device for crane. In the circuit of the control device for crane, a braking contactor is not provided with a self-locking device, while is provided with a converting device of descendent mode. The descendent mode of hoisting structure can be selected. The utility model adopts...

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Bibliographische Detailangaben
1. Verfasser: YAO XIANMING
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:Disclosed is a control device for crane. In the circuit of the control device for crane, a braking contactor is not provided with a self-locking device, while is provided with a converting device of descendent mode. The descendent mode of hoisting structure can be selected. The utility model adopts a structure of which a braking contactor main contact and a controller contact are connected in series, and the contactor can be released as long as the rise and drop of the controller at any position. The electricity of the driving element of the braker can be cut off immediately to make the braker brake. When the controller returns to zero, the electricity of the driving element of the braking contactor is cut off immediately to make the braker brake without reference to releasing or not of the braking contactor. The utility model has the advantages of simple circuit, convenient operation and high safety, and the accident potential can be eliminated.