SUPPORTING DEVICE AND ENGINEERING MACHINERY VEHICLE

摘要

A supporting device and an engineering machinery vehicle. The supporting device (20) comprises: a telescopic outrigger (201), a vertical cylinder, a horizontal cylinder, a rotating outrigger (203), a rotating outrigger cylinder, and a swing drive unit (204). The vertical cylinder comprises a vertical piston rod (2072) and a vertical cylinder barrel (2071) fitted with each other; the vertical cylinder is vertically connected to a first end of the telescopic outrigger (201). The horizontal cylinder comprises a horizontal piston rod (2082) and a horizontal cylinder barrel (2081) fitted with each other; a first end of the horizontal cylinder is horizontally connected to the telescopic outrigger (201); a first end of the rotating outrigger (203) is rotatably connected to the telescopic outrigger (201). The rotating outrigger cylinder comprises a rotating outrigger cylinder piston rod (2062) and a rotating outrigger cylinder barrel (2061) fitted with each other; the rotating outrigger cylinder is vertically connected at a second end of the rotating outrigger (203), and the swing drive unit (204) is vertically connected at the rotating outrigger (203) and is used for controlling the rotation of the rotating outrigger (203). By means of the mode, the engineering machinery vehicle utilizes the combined action of the telescopic outrigger (201) and the rotating outrigger (203) to increase an outrigger span, so the anti-tipping capability and the operation stability of the engineering machinery vehicle are improved.