FIELD: mining industry; quarry lifts for dump trucks.
SUBSTANCE: proposed lift contains line with closed leaf-and-roll chain. Devices for gripping and transporting of dump trucks are arranged on chain at definite pitch. According to invention, each gripping and transporting device for dump trucks is made in form of twin levers with rolls on free ends hinge-connected to two leaf-and-roll chains and arranged between said chains. Twin levers are installed for turning in vertical plane and moving rolls along guides arranged under guides for running rolls of traction chains. Twin levers are interconnected by platform installed with clearance over way for moving rear wheels of dump trucks and with possibility of arranged on front wheels of dump truck on said platform. Each platform is provided with curvilinear stop side of tension sprocket for engagement with front wheels of dump truck. In quarry and on its flank in zones of entering of dump trucks moving rearwards lips are installed, and in middle part of lift, traction chains are provided with additional drive sprockets. Catchers of broken traction chains are installed at equal step on inclined section of lift. Each catcher is made form of U-shaped shoe arranged over traction chain secured on upper part of guide traction chain for running rolls by means of brackets. Height of shoe increases in direction of movement of traction chain. Bus is secured on guide for twin lever rolls under traction chain. Wedge is freely fitted on traction chain inside shoe for thrusting against front wall of shoe at normal operation of lift and for jumping between shoe and traction chain at change of direction of movement of traction chain after its break.
EFFECT: provision of lifting of loaded dump trucks to flank of opencast and possibility of catching broken off traction chains.
7 dwg
