Thin seam coal mining machine

Abstract

The invention relates to a thin seam mining machine which comprises a main body part shell and two swing arm shells hinged to the left end and the right end of the front portion of the main body part shell respectively, a cutting motor is arranged between each swing arm shell and the main body part shell to serve as a hinge pin shaft, and a cover plate is installed at an opening in the front end of the main body part shell. A closed oil cylinder installation cavity is defined by the swing arm shells, the main body shell, the cutting motor and the cover plate, oil cylinders driving the left swing arm shell and the right swing arm shell to swing are installed in the oil cylinder installation cavity, the rear portion of the main body shell is provided with a left coal flow rear channel and a right coal flow rear channel, the coal flow rear channels are grooves which extend from front to back and are provided with downward groove openings, and the coal flow rear channels are communicated with the oil cylinder installation cavity. And the rear end of the groove is closed. The large mining range and the large cutting power can be provided, the machine body can be shortened, and the coal flow loading effect is improved.

Description

technical field [0001] The invention relates to a coal shearer, especially a thin coal seam shearer, which has a large mining range and high cutting power. Background technique [0002] On the existing thin coal seam shearer, the cutting motor is usually located on the rocker arm and swings with the swing of the rocker arm. When the rear rocker arm of the thin coal seam suspension body shearer picks the upper knife, there will be a problem that the mining height of the rear drum is too small. The reason is that when the mining height increases, the cutting motor of the rear rocker arm will It will interfere with the upper coal platform left behind the bottom cutting knife of the front drum, so the overall mining height of this kind of shearer is too narrow, and cannot adapt to the mining requirements of large changes in seam thickness in thin coal seam working faces in my country. [0003] In response to the above problems, the industry once proposed to divide the cutting pa...

AI Technical Summary

Problems solved by technology

When the rear rocker arm of the thin coal seam suspension body shearer picks the upper knife, there will be a problem that the mining height of the rear drum is too small. The reason is that when the mining height increases, the cutting motor of the rear rocker arm will It will interfere with the upper coal platform left behind the bottom cutting knife of the front drum, so the overall mining height of this kind of shearer is too narrow to meet the mining requirements of my country's thin coal seam working face with large changes in seam thickness

[0003] In response to the above problems, the industry once proposed to divide the cutting part into a swing part and a fixed part, and set the cutting motor and the main body of the cutting transmission system in the fixed part, resulting in the structure of the fixed part being too complicated, and the left and right lengths of the overhanging section of the fuselage are skewed. Long and heavy, the problem of the center of gravity of the whole machine still has a great influence on the force of the whole machine

In addition, the shearer with a long body structure cannot perform the straight-feeding knife process similar to the short-wall shearer, and the oblique cutting at both ends takes a long time, which limits the mining efficiency to a certain extent.

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