A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
WORK MACHINE HYDRAULIC SYSTEM AND WORK MACHINE
To suppress interference between a work tool such as a bucket and a boom side.SOLUTION: A hydraulic system of a work machine comprises: a boom cylinder; a work tool cylinder; a boom control valve that can switch the boom cylinder between an ascending position and a descending position; a work tool control valve that can switch the work tool cylinder between a first operating position and a second operating position; first and second oil passages that supply and discharge hydraulic oil to the boom cylinder; third and fourth oil passages that supply and discharge hydraulic oil to the work tool cylinder; a first relief valve that is provided in a first bypass oil passage connecting the first oil passage and the fourth oil passage, allows hydraulic oil from the fourth oil passage to the first oil passage, and blocks hydraulic oil from the first oil passage to the fourth oil passage; and a second relief valve that is provided in a second bypass oil passage connecting the second oil passage and the third oil passage, allows hydraulic oil from the third oil passage to the second oil passage, and blocks hydraulic oil from the second oil passage to the third oil passage.SELECTED DRAWING: Figure 1
【課題】バケット等の作業具とブーム側との干渉を抑制することができるようにする。【解決手段】作業機の油圧システムは、ブームシリンダと、作業具シリンダと、ブームシリンダを上昇位置と下降位置に切換可能なブーム制御弁と、作業具シリンダを第１作動位置と第２作動位置に切換可能な作業具制御弁と、ブームシリンダに作動油を給排する第１、２油路と、作業具シリンダに作動油を給排する第３、４油路と、第１油路と第４油路を接続する第１バイパス油路に設けられ且つ第４油路から第１油路に向かう作動油を許容し且つ第１油路から第４油路に向かう作動油を阻止する第１リリーフ弁と、第２油路と第３油路を接続する第２バイパス油路に設けられ且つ第３油路から第２油路に向かう作動油を許容し且つ第２油路から第３油路に向かう作動油を阻止する第２リリーフ弁と、を備えている。【選択図】図１
WORK MACHINE HYDRAULIC SYSTEM AND WORK MACHINE
To suppress interference between a work tool such as a bucket and a boom side.SOLUTION: A hydraulic system of a work machine comprises: a boom cylinder; a work tool cylinder; a boom control valve that can switch the boom cylinder between an ascending position and a descending position; a work tool control valve that can switch the work tool cylinder between a first operating position and a second operating position; first and second oil passages that supply and discharge hydraulic oil to the boom cylinder; third and fourth oil passages that supply and discharge hydraulic oil to the work tool cylinder; a first relief valve that is provided in a first bypass oil passage connecting the first oil passage and the fourth oil passage, allows hydraulic oil from the fourth oil passage to the first oil passage, and blocks hydraulic oil from the first oil passage to the fourth oil passage; and a second relief valve that is provided in a second bypass oil passage connecting the second oil passage and the third oil passage, allows hydraulic oil from the third oil passage to the second oil passage, and blocks hydraulic oil from the second oil passage to the third oil passage.SELECTED DRAWING: Figure 1
【課題】バケット等の作業具とブーム側との干渉を抑制することができるようにする。【解決手段】作業機の油圧システムは、ブームシリンダと、作業具シリンダと、ブームシリンダを上昇位置と下降位置に切換可能なブーム制御弁と、作業具シリンダを第１作動位置と第２作動位置に切換可能な作業具制御弁と、ブームシリンダに作動油を給排する第１、２油路と、作業具シリンダに作動油を給排する第３、４油路と、第１油路と第４油路を接続する第１バイパス油路に設けられ且つ第４油路から第１油路に向かう作動油を許容し且つ第１油路から第４油路に向かう作動油を阻止する第１リリーフ弁と、第２油路と第３油路を接続する第２バイパス油路に設けられ且つ第３油路から第２油路に向かう作動油を許容し且つ第２油路から第３油路に向かう作動油を阻止する第２リリーフ弁と、を備えている。【選択図】図１
WORK MACHINE HYDRAULIC SYSTEM AND WORK MACHINE
作業機の油圧システム及び作業機
ROBERT STEWART BOYD (author) / OYAMA TAKAMASA (author)
2021-01-28
Patent
Electronic Resource
Japanese
IPC:
E02F
Baggern
,
DREDGING