SHOVEL

To provide a shovel capable of producing force necessary for a work while suppressing energy loss.SOLUTION: A shovel 100 comprises an upper structure 3, a lower structure 1, an excavation attachment AT including a boom 4 and an arm 5, a hydraulic actuator, a control valve controlling a hydraulic oil...

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Bibliographic Details
Main Authors SHIRATANI RYUJI, KUROKAWA TOMONORI, SANO KIMINORI, NIIGAKI HAJIME
Format Patent
LanguageEnglish
Japanese
Published 18.03.2021
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Summary:To provide a shovel capable of producing force necessary for a work while suppressing energy loss.SOLUTION: A shovel 100 comprises an upper structure 3, a lower structure 1, an excavation attachment AT including a boom 4 and an arm 5, a hydraulic actuator, a control valve controlling a hydraulic oil flowing to the hydraulic actuator, a main pump 14, a relief valve 50, and a controller 30. The controller 30 controls a discharge amount of the main pump 14 so that a discharge pressure of the main pump 14 is maintained at a relief pressure of the relief valve 50.SELECTED DRAWING: Figure 1 【課題】エネルギ損失を抑えながらも、作業に必要な力を出すことができるショベルを提供すること。【解決手段】ショベル100は、上部旋回体3と、下部走行体1と、ブーム4及びアーム5を含む掘削アタッチメントATと、油圧アクチュエータと、油圧アクチュエータへ流れる作動油を制御する制御弁と、メインポンプ14と、リリーフ弁50と、コントローラ30と、を備えている。コントローラ30は、メインポンプ14の吐出圧がリリーフ弁50のリリーフ圧で維持されるように、メインポンプ14の吐出量を制御する。【選択図】図1
Bibliography:Application Number: JP20190166125