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TRAVELING TYPE HYDRAULIC WORK MACHINE
PROBLEM TO BE SOLVED: To provide a traveling type hydraulic work machine that never spoils straight traveling properties during a high-speed travel and can effectively reduce pressure loss.SOLUTION: A hydraulic work machine includes: an engine 20; first and second hydraulic pumps 22A and 22B; left and right travel motors 24A and 24B which drive left and right traveling bodies respectively; a travel operation device 38; control valves 26 and 32 corresponding to the left and right travel motors 24A and 24B; a rotating speed setter 40 which sets a target rotating speed of the engine 20; and a target rotating speed determination part 60 which determines the target rotating speed through an operation on the rotating speed setter 40. The target rotating speed determination part 60 determines the target rotating speed which is lower when target rotating speed reduction conditions including imparting of an operation for a high-speed straight travel to the travel operation device 38 are met than when the target rotating speed reduction conditions are not met.
【課題】走行式の油圧作業機械であって、高速走行時に直進走行性を損なうことなく圧力損失を有効に低減することが可能なものを提供する。【解決手段】油圧作業機械は、エンジン20と、第1及び第2油圧ポンプ22A,22Bと、左右走行体をそれぞれ駆動する左右走行モータ24A,24Bと、走行操作装置38と、左右走行モータ24A,24Bにそれぞれ対応するコントロールバルブ26,32と、エンジン20の目標回転数を設定するための回転数設定器40と、回転数設定器40の操作に基づいて目標回転数を決定する目標回転数決定部60と、を備える。目標回転数決定部60は、走行操作装置38に高速直進走行を行うための操作が与えられることを含む目標回転数低減条件を満たす場合に、当該目標回転数低減条件を満たさない場合に比べて低い目標回転数を決定する。【選択図】図2
TRAVELING TYPE HYDRAULIC WORK MACHINE
PROBLEM TO BE SOLVED: To provide a traveling type hydraulic work machine that never spoils straight traveling properties during a high-speed travel and can effectively reduce pressure loss.SOLUTION: A hydraulic work machine includes: an engine 20; first and second hydraulic pumps 22A and 22B; left and right travel motors 24A and 24B which drive left and right traveling bodies respectively; a travel operation device 38; control valves 26 and 32 corresponding to the left and right travel motors 24A and 24B; a rotating speed setter 40 which sets a target rotating speed of the engine 20; and a target rotating speed determination part 60 which determines the target rotating speed through an operation on the rotating speed setter 40. The target rotating speed determination part 60 determines the target rotating speed which is lower when target rotating speed reduction conditions including imparting of an operation for a high-speed straight travel to the travel operation device 38 are met than when the target rotating speed reduction conditions are not met.
【課題】走行式の油圧作業機械であって、高速走行時に直進走行性を損なうことなく圧力損失を有効に低減することが可能なものを提供する。【解決手段】油圧作業機械は、エンジン20と、第1及び第2油圧ポンプ22A,22Bと、左右走行体をそれぞれ駆動する左右走行モータ24A,24Bと、走行操作装置38と、左右走行モータ24A,24Bにそれぞれ対応するコントロールバルブ26,32と、エンジン20の目標回転数を設定するための回転数設定器40と、回転数設定器40の操作に基づいて目標回転数を決定する目標回転数決定部60と、を備える。目標回転数決定部60は、走行操作装置38に高速直進走行を行うための操作が与えられることを含む目標回転数低減条件を満たす場合に、当該目標回転数低減条件を満たさない場合に比べて低い目標回転数を決定する。【選択図】図2
TRAVELING TYPE HYDRAULIC WORK MACHINE
走行式油圧作業機械
TAKESHITA TATSUYA (Autor:in)
27.07.2015
Patent
Elektronische Ressource
Japanisch
HYDRAULIC DRIVE OF WORK MACHINE EQUIPPED WITH CRAWLER-TYPE TRAVELING DEVICE
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