Each of left and right direction switching valves includes: a pump port connected to a pump; a first compensation port connected to an upstream side of a corresponding pressure compensation valve; a second compensation port connected to a downstream side of the corresponding pressure compensation valve; a pair of supply/discharge ports connected to a corresponding travel motor; and a communication port. The communication ports of the left and right direction switching valves are connected by a communication line. When a spool shifts from a neutral position by the travel operation device, the pump port communicates with the first compensation port and the second compensation port communicates with one of the supply/discharge ports and the communication port. Each direction switching valve is configured wherein a degree of communication between the second compensation port and communication port increases in a shifting amount of the spool from the neutral position.
HYDRAULIKKREISLAUF EINER BAUMASCHINE
2021-07-08
Patent
Electronic Resource
German
Bedieneinheit für eine Baumaschine, Baumaschine und Verfahren zur Bedienung einer Baumaschine
European Patent Office | 2022
|BEDIENEINHEIT FÜR EINE BAUMASCHINE, BAUMASCHINE UND VERFAHREN ZUR BEDIENUNG EINER BAUMASCHINE
European Patent Office | 2022
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