Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Provided is a hydraulic drive apparatus capable of suitably supplying hydraulic fluid upon slip of a traveling body of a working machine. The hydraulic drive apparatus includes a specific working actuator (27) making a working arm perform a traveling assist motion upon the slip, first and second traveling motors (25R, 25L), first and second hydraulic pumps (31, 32), a traveling selector valve (39) switchable to a neutral position (PN) and a straight traveling position (PS), a communication throttle portion (39b) provided in a communication passage providing communication between a working fluid passage and a traveling fluid passage in the straight traveling position, and a switching control part (50) switching the traveling selector valve (39) to the neutral position (PN) when a single operation action is performed and switches the traveling selector valve (39) to the straight traveling position (PS) when a specific combined operation action of simultaneously making a forward traveling operation and the specific working operation is performed. The switching control section (50) adjusts the opening degree of the communication throttle section (39b) to decrease the flow rate in the communication passage (39c) with an increase in the difference between the first pump pressure and the second pump pressure.
Provided is a hydraulic drive apparatus capable of suitably supplying hydraulic fluid upon slip of a traveling body of a working machine. The hydraulic drive apparatus includes a specific working actuator (27) making a working arm perform a traveling assist motion upon the slip, first and second traveling motors (25R, 25L), first and second hydraulic pumps (31, 32), a traveling selector valve (39) switchable to a neutral position (PN) and a straight traveling position (PS), a communication throttle portion (39b) provided in a communication passage providing communication between a working fluid passage and a traveling fluid passage in the straight traveling position, and a switching control part (50) switching the traveling selector valve (39) to the neutral position (PN) when a single operation action is performed and switches the traveling selector valve (39) to the straight traveling position (PS) when a specific combined operation action of simultaneously making a forward traveling operation and the specific working operation is performed. The switching control section (50) adjusts the opening degree of the communication throttle section (39b) to decrease the flow rate in the communication passage (39c) with an increase in the difference between the first pump pressure and the second pump pressure.
HYDRAULIC DRIVE DEVICE FOR TRAVELING WORK MACHINE
HYDRAULISCHE ANTRIEBSVORRICHTUNG FÜR EINE FAHRENDE ARBEITSMASCHINE
DISPOSITIF D'ENTRAÎNEMENT HYDRAULIQUE POUR MACHINE DE TRAVAIL EN DÉPLACEMENT
UEDA KOJI (Autor:in)
12.07.2023
Patent
Elektronische Ressource
Englisch
HYDRAULIC DRIVE OF WORK MACHINE EQUIPPED WITH CRAWLER-TYPE TRAVELING DEVICE
| Europäisches Patentamt | 2021