FIELD: machine building.
SUBSTANCE: power efficient working equipment consists of turning platform, of gantry, of boom, of stick, of bucket, of hydro-cylinders of boom lift. of hydro-cylinders of stick turn and of hydro-cylinder of bucket turn. In vertical plane of symmetry of the boom between hydro-cylinders of stick turn there is installed a pneumatic hydro-cylinder pivotally secured on the turning platform and the boom, a piston cavity of which is connected at least with two gas tanks charged with compressed air at pressure over 10 MPa. Total volume of gas tanks amounts to at least four working volumes of the pneumatic hydro-cylinder. At least one hydraulic damper of working fluid pressure charged with compressed air over 15 MPa is connected to piston cavities of the boom hydro-cylinders.
EFFECT: improved design of working equipment of hydraulic excavator, reduced fluctuations of pressure in hydro-system of working equipment.
2 dwg
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