초록 ▼

The invention relates to a road-milling machine or machine for working deposits, such as deposits of coal, ores, minerals, etc. by surface mining. The machine according to the invention has an arrangement 14 for detecting the path followed by a milled edge 13 of a milled strip, with the arrangement

The invention relates to a road-milling machine or machine for working deposits, such as deposits of coal, ores, minerals, etc. by surface mining. The machine according to the invention has an arrangement 14 for detecting the path followed by a milled edge 13 of a milled strip, with the arrangement for detecting the path followed by the milled edge having means 14 for measuring the distance between at least one reference point I on the machine and the milled edge. The means 14 for detecting the path followed by the milled edge co-operate with the arrangement 6 for steering the track-laying units 3A, 3B in such a way that the machine follows the path followed by the milled edge. The distance between the at least one reference point on the machine and the milled edge can be set in such a way that milled strips situated alongside one another are exactly aligned relative to one another.

대표청구항 ▼

We claim: 1. A milling machine for milling a ground surface, comprising:a chassis having a direction of travel;a running gear supporting the chassis and including front and rear track-laying units;a rotatable milling drum supported from the chassis between the front and rear track-laying units, the

We claim: 1. A milling machine for milling a ground surface, comprising:a chassis having a direction of travel;a running gear supporting the chassis and including front and rear track-laying units;a rotatable milling drum supported from the chassis between the front and rear track-laying units, the drum having a working width for milling a strip from the ground surface, the strip having two substantially vertical milled edges;a steering system operable to steer at least one of the track-laying units;a mechanical sensing member pivotable about a vertical axis and operable to engage one of the previously milled edges of a previously milled strip;a sensor associated with the sensing member and operable to detect an angular position of the sensing member about the vertical axis;a controller operably associated with the sensor and the steering system, the controller operable to steer the machine so that the machine follows a path defined by the previously milled edge engaged by the pivotable sensing member;a left-hand edge guard and a right-hand edge guard extending longitudinally adjacent two ends of the milling drum;a second sensing member, the first and second sensing members being connected to the left and right edge guards, respectively, the first and second sensing members being selectively activateable; andvertical adjustment mechanisms operably associated with the edge guards for adjusting vertical positions of the edge guards;wherein the controller is operable to detect one of the edge guards being in a higher position and the other of the edge guards being in a lower position, and the controller is operable to activate the pivotable sensing member associated with the edge guard in the lower position.