Mining or in situ disintegration of hard material – Hard material disintegrating machines – With material-handling means
Patent
1988-08-22
1989-11-07
Massie, IV, Jerome W.
Mining or in situ disintegration of hard material
Hard material disintegrating machines
With material-handling means
299 76, F21D 910, F21D 912
Patent
active
048787140
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a cutting machine having cutting heads or drums which are rotatably supported on a swivelling cutting arm, with a loading ramp or conveyor extending in the direction to the work face to receive and transport the cut material.
From Austrian Patent No. 380 730, a cutting machine having an all-round swivelling boom, at the free end of which at least one cutting head is rotatably supported, has become known, a collecting channel being arranged below the cutting head for the cut material being connected with the boom carrying the cutting head, such a design of a collecting channel being arranged below the cutting head making superfluous the provision of a loading ramp. In the case of the cutting machine disclosed in Austrian Patent No. 380 728, there are connected to the cutting arm at both sides of the cutting arm in each case one worm conveyor for rearward transportaion, the front end of the cutting arm being in the region of the cutting head. The cut material is therefore transported away by the worm conveyors arranged laterally of the cutting arm, the conveyor worms being surrounded by a housing which is designed to be open on that side facing away from the cutting arm.
Known arrangements of the kind mentioned above are disclosed, for example, in U.S. Pat. No. 3,966,258, having swivelling loading ramps or conveying means, which may be chain conveyors, in the front region facing the work face. The loading ramp is usually located below the rotatably supported cutting heads, with the result that the material cut by the cutting heads falls on to the loading ramp. In the case of such arrangements it is, however, necessary to take steps to prevent a collision between cutting arm and loading ramp. The position of the loading ramp for the purpose of receiving the cut material is adjusted by displacement of the machine. When cutting a drift, as a rule, the entire machine is therefore displaced, thus simultaneously advancing the loading ramp to an appropriate position.
SUMMARY OF THE INVENTION
On the basis of a cutting machine of the kind mentioned at the outset, the invention aims at making possible an exact positioning of the loading ramp or conveying means even when the cutting machine is not displaced. To meet this object, the invention essentially is characterized in that the loading ramp or conveyor is supported on the machine frame to be displaceable in the longitudinal direction of the cutting machine. As a result of the fact that the loading ramp or conveyor is supported on the machine frame to be displaceable in the longitudinal direction of the cutting machine, an adjustment of the loading ramp can be undertaken, irrespective of the position of the machine itself, and thus, in particular when it is intended to cut with the cutting heads close to the floor, such a loading ramp can simply be drawn back in order to avoid a collision with the cutting appliances. Such an arrangement is particularly advantageous in connection with known cutting machines in the case of which the horizontal pivotal axis of the cutting arm, which axis extends at right angles to the longitudinal direction of the machine, is provided to be adjustable in the longitudinal direction of the machine relative to the machine frame. In the case of such cutting machines, a drift can be cut without displacement of the machine itself, the pivotal axis of the cutting arm being relocated forward in the direction of the work face. In the case of such an arrangement, it is particularly advantageous if the adjusting movement of the horizontal pivotal axis of the cutting arm is coupled with the adjusting movement of the loading ramp or conveyor, so that the possibility is given to advance the loading means simultaneously with the cutting of a new drift with the advancing movement of the pivotal axis of the cutting arm. A cutting arm moved forwards in the direction to the work face does not collide earlier with the loading means, even when the loading ramp or conveying means follow in the direct
REFERENCES:
patent: 3966258 (1976-06-01), Dolecki
Barnthaler Franz
Rutkowski Krzysztof
Bagnell David J.
Massie IV Jerome W.
Voest-Alpine Aktiengesellschaft
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