FIELD: transport engineering; quarry dump trucks.
SUBSTANCE: invention relates to devices for lifting and lowering dump-trucks when carrying out opencast mining. Proposed device for lifting dump-truck to flank of opencast contains, in addition of lifting line, a lowering line, both lines are parallel, being mechanically coupled by drive sprockets in head and middle parts of both lines. Each device for gripping and transporting of dump-trucks up and down is made in form twin levers with rollers hinge-connected to two leaf-and-roller chains and arranged in between for turning twin levers in vertical plane and moving rollers along guides arranged under guides for running rollers of traction chains. Twin levers are interconnected by platform to arrange front wheels of dump0truck. Platforms are arranged with clearances over tracks and are provided with curvilinear stop on lifting line from side of tension sprocket for engagement with front wheels of dump-truck and are made on lowering line with two stops to arranged front wheels of dump-truck between said stops. Cavities with inclined bottom to said of tension sprocket and wall square to surface of track are arranged on surface of lifting line track at definite step. Each platform of lifting line is furnished with shoe hinge-secured on platform symmetrically to longitudinal axis of lifting line for engagement of free end of shoe with surface of track at normal operation and, at break of traction chains, engagement of free end with wall of cavity, and free end of curvilinear form, with stop of platform.
EFFECT: provision of lifting loaded dump-trucks to flank of opencast and simultaneous lowering of empty-dump trucks into opencast with possibility of holding loaded dump-truck on lifting line in case of breaks of traction chains.
2 cl, 7 dwg
