WORKING EQUIPMENT OF HYDRAULIC EXCAVATOR Russian patent published in 2010 - IPC E02F3/28 E02F5/08 

FIELD: mining.

SUBSTANCE: working equipment of hydraulic excavator consists of swivel platform, of connected thereto two-beam cantilever boom with lifting-lowering mechanism, of disk cutter with rotation mechanism and of pump station. The mechanism of boom lifting-lowering includes a pole pivotally connected to the swivel platform and the boom, a hydro-cylinder of pole lifting and telescopic hydro-cylinder pivotally tied with the swivel platform and the boom. Also the boom is made telescopic and includes a root, intermediate and head sections with a telescopic mechanism of their extending and telescopic pipelines. The head section of the boom is assembled of three parts: a boom head, middle section and extended section and is designed to double fold in vertical plane by means of two hydro-mechanisms. Notably, working equipment includes an additional disk cutter mounted on the head of the boom head section; the cutters are equipped with separate rotation mechanisms and arranged one above the other. Rotation centre of the upper disk cutter is set off forward downstream sections extension, while width of the upper disk cutter exceeds that one of the lower disk cutter. Support skies are hinged at the head of the head section of the boom on both sides of the upper disk cutter.

EFFECT: increased efficiency of loosening quarry faces of up to 15 m height and frozen to 2-2,2 m depth, cutting chaps both at slopes and at working platforms, decreased weight of working equipment, increased steadiness and manoeuvrability of excavator at travel.

2 cl, 6 dwg