ACCESSARY UP AND DOWN DEVICE AGRICULTURAL TRACTOR

The present invention relates to an apparatus (10) for vertically moving a working tool of an agricultural tractor capable of performing up/down lift on a rotary or a plow without malfunction or trouble like an electronic hydraulic apparatus by including an up-down unit (30) having an automatic lift...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	NAM, CHEUNG HYUN
Format:	Patent
Sprache:	eng ; kor
Schlagworte:	AGRICULTURE ANIMAL HUSBANDRY FISHING FORESTRY HUMAN NECESSITIES HUNTING PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES ORIMPLEMENTS, IN GENERAL SOIL WORKING IN AGRICULTURE OR FORESTRY TRAPPING
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Beschreibung
Zusammenfassung:	The present invention relates to an apparatus (10) for vertically moving a working tool of an agricultural tractor capable of performing up/down lift on a rotary or a plow without malfunction or trouble like an electronic hydraulic apparatus by including an up-down unit (30) having an automatic lift valve (51) moved by oil pressure supplied from a tractor hydraulic circuit and an up-down valve (61) making a rotary or a plow to move upward and downward by interworking with the automatic lift valve (51), and particularly, capable of being manufactured at low cost relatively to the electric hydraulic apparatus.