The present invention relates to a hydraulic steering device of an agricultural work vehicle, the hydraulic steering device comprising: a steering pump for supplying a working fluid; an automatic steering unit which is connected to the steering pump and uses the working fluid supplied from the steering pump to change the traveling direction of the agricultural work vehicle when automatic steering is performed by a control unit; a manual steering unit which is connected to the steering pump and uses the working fluid supplied from the steering pump to change the traveling direction of the agricultural work vehicle when manual steering is performed by operating a steering handle; and an automatic cut-off unit which is connected to the automatic steering unit and is for selectively cutting off the supply of the working fluid for the automatic steering to a steering cylinder of the agricultural work vehicle according to whether the manual steering is being performed, wherein the automatic cut-off unit allows the working fluid for the automatic steering to be supplied to the steering cylinder, but uses a portion of the working fluid supplied from the steering pump to the manual steering unit to cut off the supply of the working fluid for the automatic steering to the steering cylinder when the manual steering is being performed.

    La présente invention concerne un dispositif de direction hydraulique d'un engin agricole, le dispositif de direction hydraulique comprenant : une pompe de direction destinée à fournir un fluide de travail; une unité de direction automatique qui est reliée à la pompe de direction et qui utilise le fluide de travail fourni par la pompe de direction pour modifier la direction de déplacement de l'engin agricole lorsqu'une direction automatique est effectuée par une unité de commande; une unité de direction manuelle qui est reliée à la pompe de direction et qui utilise le fluide de travail fourni par la pompe de direction pour modifier la direction de déplacement de l'engin agricole lorsqu'une direction manuelle est effectuée par actionnement d'une poignée de direction; et une unité de coupure automatique qui est reliée à l'unité de direction automatique et qui est destinée à interrompre de manière sélective l'alimentation en fluide de travail pour la direction automatique vers un vérin de direction de l'engin agricole selon que la direction manuelle est en train d'être effectuée ou non, l'unité de coupure automatique permettant au fluide de travail pour la direction automatique d'être fourni au vérin de direction, mais utilisant une partie du fluide de travail fourni par la pompe de direction à l'unité de direction manuelle pour interrompre l'alimentation en fluide de travail pour la direction automatique vers le vérin de direction lorsque la direction manuelle est en train d'être effectuée.

    본 발명은 작동유체를 공급하는 조향펌프; 상기 조향펌프에 연결되고, 제어부에 의한 자동조향이 이루어짐에 따라 상기 조향펌프로부터 공급된 작동유체를 이용하여 농업용 작업차량의 주행방향을 변경시키는 자동조향유닛; 상기 조향펌프에 연결되고, 조향핸들의 조작에 의한 수동조향이 이루어짐에 따라 상기 조향펌프로부터 공급된 작동유체를 이용하여 상기 농업용 작업차량의 주행방향을 변경시키는 수동조향유닛; 및 상기 자동조향유닛에 연결되고, 상기 수동조향이 이루어지는지 여부에 따라 상기 자동조향을 위한 작동유체가 상기 농업용 작업차량의 조향실린더로 공급되는 것을 선택적으로 차단하기 위한 자동차단유닛을 포함하고, 상기 자동차단유닛은 상기 자동조향을 위한 작동유체가 상기 조향실린더로 공급되는 것을 허용하되, 상기 수동조향이 이루어지는 경우 상기 조향펌프에서 상기 수동조향유닛으로 공급된 작동유체의 일부를 이용하여 상기 자동조향을 위한 작동유체가 상기 조향실린더로 공급되는 것을 차단하는 농업용 작업차량의 유압식 조향장치에 관한 것이다.


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    Title :

    HYDRAULIC STEERING DEVICE OF AGRICULTURAL WORK VEHICLE


    Additional title:

    DISPOSITIF DE DIRECTION HYDRAULIQUE POUR ENGIN AGRICOLE
    농업용 작업차량의 유압식 조향장치


    Contributors:

    Publication date :

    2021-01-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Korean


    Classification :

    IPC:    A01B SOIL WORKING IN AGRICULTURE OR FORESTRY , Bodenbearbeitung in Land- oder Forstwirtschaft / B62D MOTOR VEHICLES , Motorfahrzeuge



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