Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINE
PROBLEM TO BE SOLVED: To improve energy saving characteristic at the time of fine operation while assuring a fine operability when a specified actuator is driven at a hydraulic system of a construction machine such as a hydraulic shovel or the like in which the third circuit of a control valve unit having the first to third circuits connected to the first to third hydraulic pumps is provided with a confluence change-over valve, the discharged oil from the third hydraulic pump is merged with discharged oil from the first or second hydraulic pump, the hydraulic actuator such as a boom cylinder or the like is incremented in speed and driven.SOLUTION: A confluence change-over valve 15 is constituted in such a way that when an instruction pilot pressure for changing over a specified changing-over valve 7 from its neutral position is less than a prescribed pressure Pa, it is changed over to a merging position if the instruction pilot pressure becomes higher than the prescribed pressure Pa irrespective of the merging position.SELECTED DRAWING: Figure 1
【課題】第１〜第３油圧ポンプに接続された第１〜第３回路を有する制御弁ユニットの第３回路に合流切換弁を設け、第１若しくは第２油圧ポンプからの吐出油に第３油圧ポンプからの吐出油を合流させることで、ブームシリンダ等の油圧アクチュエータを増速して駆動するようにした油圧ショベル等の建設機械の油圧システムにおいて、特定のアクチュエータを駆動するときの微操作性を確保しながら、微操作時の省エネ性を向上する。【解決手段】合流切換弁１５は、特定の切換弁７を中立位置から切り換える指令パイロット圧が所定の圧力Ｐａ未満の場合、合流位置に切り換わらず、指令パイロット圧が所定の圧力Ｐａより高くなると合流位置に切り換わるように構成されている。【選択図】 図１
HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINE
PROBLEM TO BE SOLVED: To improve energy saving characteristic at the time of fine operation while assuring a fine operability when a specified actuator is driven at a hydraulic system of a construction machine such as a hydraulic shovel or the like in which the third circuit of a control valve unit having the first to third circuits connected to the first to third hydraulic pumps is provided with a confluence change-over valve, the discharged oil from the third hydraulic pump is merged with discharged oil from the first or second hydraulic pump, the hydraulic actuator such as a boom cylinder or the like is incremented in speed and driven.SOLUTION: A confluence change-over valve 15 is constituted in such a way that when an instruction pilot pressure for changing over a specified changing-over valve 7 from its neutral position is less than a prescribed pressure Pa, it is changed over to a merging position if the instruction pilot pressure becomes higher than the prescribed pressure Pa irrespective of the merging position.SELECTED DRAWING: Figure 1
【課題】第１〜第３油圧ポンプに接続された第１〜第３回路を有する制御弁ユニットの第３回路に合流切換弁を設け、第１若しくは第２油圧ポンプからの吐出油に第３油圧ポンプからの吐出油を合流させることで、ブームシリンダ等の油圧アクチュエータを増速して駆動するようにした油圧ショベル等の建設機械の油圧システムにおいて、特定のアクチュエータを駆動するときの微操作性を確保しながら、微操作時の省エネ性を向上する。【解決手段】合流切換弁１５は、特定の切換弁７を中立位置から切り換える指令パイロット圧が所定の圧力Ｐａ未満の場合、合流位置に切り換わらず、指令パイロット圧が所定の圧力Ｐａより高くなると合流位置に切り換わるように構成されている。【選択図】 図１
HYDRAULIC DRIVING DEVICE OF CONSTRUCTION MACHINE
建設機械の油圧駆動装置
NAKAMURA NATSUKI (Autor:in) / TAKAHASHI KIWAMU (Autor:in) / TAKEBAYASHI KEIFUMI (Autor:in) / MORI KAZUSHIGE (Autor:in) / ITO MASAMICHI (Autor:in)
14.04.2016
Patent
Elektronische Ressource
Japanisch