FIELD: quarry transport.
SUBSTANCE: invention relates to complexes for lifting and lowering dump trucks into quarry at opencast mining. Proposed complex consists of inclined section and adjoining horizontal sections in upper and lower parts of complex. Line for lowering dump trucks into quarry is arranged in parallel to dump truck lifting line. Both lines are mechanically coupled by drive sprockets in head and middle parts of both lines, gear ratio being 1. Each device for gripping and transporting dump truck upwards and downwards is made in form of twin levers hinge connected to two leaf and roll chains, levers being arranged between chains. Said twin levers are connected by platform for fitting rear wheels of dump truck on lifting line and front wheels, on lowering lines. Said platform are arranged with clearances over tracks. Each platform is provided with curvilinear stop for wheels. Devices for catching torn off pull chains are arranged on inclined section at equal pitch. Each said chain catching device is made in form of U-shaped shoe secured by brackets in upper part of guide for running rolls of pull chain and arranged over pull chain with its height increasing in direction of pull chain movement. Bus is installed under pull chain within minimum clearance of guide for twin lever rolls, and wedge is freely fitted inside shoe on pull chain for thrusting against front wall of shoe at normal operation of complex and for wedging between shoe and pull chain at change of direction of movement of broken pull chain. Additional sprockets are installed on lifting and lowering lines for engagement with upper runs of pull chains. Axles of said sprockets are mechanically intercoupled by gear pair, gear ratio 1.
EFFECT: provision of continuous transportation, brought to minimum metal usage and consumption of power when lifting and lowering dump trucks.
9 dwg
