A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
HYDRAULIC TRANSMISSION OF CONSTRUCTION MACHINE
PROBLEM TO BE SOLVED: To provide a hydraulic transmission of a construction machine capable of ensuring excellent combined control operability when combined control operating by a light load work implement and a heavy load work implement.SOLUTION: With a hydraulic transmission of a large-sized hydraulic shovel of the invention, a controller 60 includes: a first discrimination part 60a for determining whether operation is boom lowering single operation or boom lowering/arm drawing combined operation; a normal control table 60b that is selected when the single operation is determined by the first discrimination part 60a for outputting the current corresponding to the lever angle of a boom electric lever device 70 to a specific electromagnetic valve 50; and a specific control table 60c that is selected when the combined operation is determined by the first discrimination part 60a and in which the ratio of the current value of the output current to the lever angle of the boom electric lever device 70 is previously set smaller than that in the normal control table 60b, for outputting the current corresponding to this setting to the specific electromagnetic valve 50.SELECTED DRAWING: Figure 3
【課題】軽負荷作業具と重負荷作業具とによる複合操作に際し、優れた複合操作性を確保することができる建設機械の油圧駆動装置の提供。【解決手段】本発明に係る大型油圧ショベルの油圧駆動装置は、コントローラ６０が、ブーム下げ単独操作か、ブーム下げ・アーム引き複合操作かを判別する第１判別部６０ａと、第１判別部６０ａで単独操作と判別されたときに選択され、ブーム用電気レバー装置７０のレバー角度に応じた電流を特定電磁弁５０に出力する通常制御テーブル６０ｂと、第１判別部６０ａで複合操作と判別されたときに選択され、ブーム用電気レバー装置７０のレバー角度に対する出力電流の電流値の割合が、通常制御テーブル６０ｂにおけるよりも予め小さく設定され、この設定に応じた電流を特定電磁弁５０に出力する特定制御テーブル６０ｃとを含む構成にしてある。【選択図】図３
HYDRAULIC TRANSMISSION OF CONSTRUCTION MACHINE
PROBLEM TO BE SOLVED: To provide a hydraulic transmission of a construction machine capable of ensuring excellent combined control operability when combined control operating by a light load work implement and a heavy load work implement.SOLUTION: With a hydraulic transmission of a large-sized hydraulic shovel of the invention, a controller 60 includes: a first discrimination part 60a for determining whether operation is boom lowering single operation or boom lowering/arm drawing combined operation; a normal control table 60b that is selected when the single operation is determined by the first discrimination part 60a for outputting the current corresponding to the lever angle of a boom electric lever device 70 to a specific electromagnetic valve 50; and a specific control table 60c that is selected when the combined operation is determined by the first discrimination part 60a and in which the ratio of the current value of the output current to the lever angle of the boom electric lever device 70 is previously set smaller than that in the normal control table 60b, for outputting the current corresponding to this setting to the specific electromagnetic valve 50.SELECTED DRAWING: Figure 3
【課題】軽負荷作業具と重負荷作業具とによる複合操作に際し、優れた複合操作性を確保することができる建設機械の油圧駆動装置の提供。【解決手段】本発明に係る大型油圧ショベルの油圧駆動装置は、コントローラ６０が、ブーム下げ単独操作か、ブーム下げ・アーム引き複合操作かを判別する第１判別部６０ａと、第１判別部６０ａで単独操作と判別されたときに選択され、ブーム用電気レバー装置７０のレバー角度に応じた電流を特定電磁弁５０に出力する通常制御テーブル６０ｂと、第１判別部６０ａで複合操作と判別されたときに選択され、ブーム用電気レバー装置７０のレバー角度に対する出力電流の電流値の割合が、通常制御テーブル６０ｂにおけるよりも予め小さく設定され、この設定に応じた電流を特定電磁弁５０に出力する特定制御テーブル６０ｃとを含む構成にしてある。【選択図】図３
HYDRAULIC TRANSMISSION OF CONSTRUCTION MACHINE
建設機械の油圧駆動装置
ITO HIDEAKI (author)
2017-06-22
Patent
Electronic Resource
Japanese