Crushed rock loading machine

A crushed rock discharging machine comprising a carriage;

• a body with rests and a boom mounted on said carriage, said body being allowed to pivot for setting said boom to stowed and operating positions;
• said boom being in the form of two parallel brackets;
• a drive for pivoting said body;
• a shaft fitted into said brackets;
• an operating unit suspended from inner sides of said brackets by means of said shaft and allowed to turn in the vertical plane for depending under crushed rock flowing on a mine working floor;
• a drive for turning said operating unit, said operating unit being composed of two guide plates, a beam, a wedge-shaped cross-bar and a conveyor, said guide plates having arched rear edges for preventing the ingress of crushed rock under said operating unit from the sides thereof when said unit is placed on the working floor and is dug under discharged rock, said beam serving to interconnect said guide plates in the upper section and to protect the operating unit against heavy blows when crushed rock breaks rapidly out of an outlet opening, said wedge-shaped cross-bar serving to interconnect said guide plates in the lower section and to dig in under crushed rock, said cross-bar having a rear wall with a recess, a driven roller of said conveyor hinged to said guide plates of the operating unit and located beside said recess at a minimum possible clearance to allow movement of the conveyor and, at the same time, to prevent entry of small fractions of rock into a space under said conveyor, the intake and discharge sections thereof being interconnected by means of a hinge joint for cathing and extraction of crushed rock located above said intake section after said operating unit is dug in, and for hauling crushed rock, respectively;
• at least two arms attached to said boom brackets and allowed to swing in the vertical plane for interaction with crushed rock and mated with the outer surfaces of said guide plates, said mating surfaces of said guide plates and arms being congruent;
• guides in said boom brackets and inclined toward said wedge-shaped cross-bar at retraction of the latter to the extreme rear position for accommodating a shaft of said hinge joint of said conveyor incline upon swinging of said operating unit.