PROBLEM TO BE SOLVED: To provide a counterweight attaching/detaching device that is capable of reducing the weight of a machine body side lower link and its attachment part, the machine body side lower link being provided at the rear part of a swivel base and having a distal end at which a hydraulic cylinder for lift is mounted, and that makes operation velocity of the hydraulic cylinder for lift close to operation velocity of the counterweight to control the velocity of the counterweight.SOLUTION: A counterweight attaching/detaching device 10 is provided at the rear part of a swivel base 3 of a movable crane, and removably mounts a counterweight 40, the counterweight attaching/detaching device 10 comprising a machine body side upper link 11 and a machine body side lower link 21 that are provided vertically apart from each other at the rear part of the swivel base 3 to lock the counterweight 40, and a hydraulic cylinder for lift 16 that is arranged between distal ends of the machine body side upper link 11 and the machine body side lower link 21 and that liftably and pivotably drives the machine body side upper link 11 around its longitudinal intermediate part serving as a pivoting support point. The counterweight attaching/detaching device 10 arranges a machine body side tension bar between the machine body side lower link 21 and a bracket unit 30 located at the side closer to the machine body side upper link 11.SELECTED DRAWING: Figure 1
【課題】旋回台の後部に設けられ先端部にリフト用油圧シリンダが取付けられた機体側下リンク及びその取付け部の軽量化を図ることができ、リフト用油圧シリンダの動作速度とカウンターウエイトの動作速度を近づけカウンターウエイトの速度制御を図ったカウンタウエイト着脱装置を提供。【解決手段】カウンタウエイト着脱装置10は、移動式クレーンの旋回台3の後部に設置され、カウンタウエイト40を取外し可能に装着するものであり、旋回台3の後部に上下に離間して設けられカウンタウエイト40を係止する機体側上リンク11及び機体側下リンク21と、機体側上リンク11と機体側下リンク21の各先端部相互間に配設され、機体側上リンク11をその長さ方向中間部を回動支点として起伏回動自在に駆動するリフト用油圧シリンダ16とを備え、機体側下リンク21と機体側上リンク11側に位置するブラケット部30との間に機体側テンションバーを配設する。【選択図】図1
COUNTERWEIGHT ATTACHING/DETACHING DEVICE
カウンタウエイト着脱装置
2018-04-12
Patent
Elektronische Ressource
Japanisch
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