WORKING EQUIPMENT OF SINGLE-BUCKET HYDRAULIC EXCAVATOR Russian patent published in 2004 - IPC

FIELD: earth moving machinery.

SUBSTANCE: working equipment of single-bucket hydraulic excavator includes dipper stick, bucket and hydraulic operated triple-joint insert placed in between one part of which is full-swing one. Axle of hinge joint fastening triple-joint insert to dipper stick in located in plane of dipper stick travel, and full-swing part is located between hinge joints fastening dipper stick and bucket. Bucket turning drive includes two hydraulic cylinders and bucket turning intermediate lever placed in between for successive force action onto its rear wall. First of bucket turning hydraulic cylinders is hinge-coupled with bucket turning axle, being also axle of said joint, and with one arm of intermediate lever supported by full-swing part of triple-joint insert. Second arm of intermediate lever is hinge-coupled through second bucket turning hydraulic cylinder with hinge joint on rear wall of bucket. Triple-joint insert turning hydraulic cylinder is hinge-connected with dipper stick to provide tilting of longitudinal axis of said hydraulic cylinder in plane parallel to triple-joint insert turning plane and hinge-connected with possibility of its deflection from longitudinal axis in plane of turning of triple-joint insert through angle up 90^o to each side from middle position in which longitudinal axle of triple-joint insert, being also axle of full swing part of triple-joint insert, is extension of axle of dipper stick. Rod of triple-joint insert turning hydraulic cylinder is in middle position relative to its body. Bucket turning second hydraulic cylinder is made telescopic.

EFFECT: improved reliability of working equipment.

2 cl, 6 dwg