Cutting mechanism of thin seam short-span coal mining machine

Abstract

The invention relates to a thin seam short-span coal mining machine cutting mechanism which comprises a cutting motor, a swing arm shell and a front main body shell, a main body of the swing arm shell is an arm frame extending left and right, a connecting arm overhanging forwards is arranged in the middle of the arm frame, and a front arm overhanging leftwards or rightwards is arranged on the connecting arm. A first lug seat, a second lug seat and a connecting base are sequentially arranged on the right edge or the left edge of the front main body part shell from front to back, and the high-speed end of the front arm and the high-speed end of the arm frame are mutually inserted and hinged with the first lug seat, the second lug seat and the connecting base of the front main body part shell; an output shaft of the cutting motor is in coaxial transmission connection with an input end gear of a cutting transmission mechanism in the arm frame, and the cutting motor is fixedly connected and rotationally connected relative to the front main body part shell and the swing arm shell respectively. According to the invention, a larger mining range and larger cutting power can be provided, the machine body can be shortened, and the gravity center of the coal mining machine can be improved.

Description

technical field [0001] The invention relates to a shearer cutting mechanism, which is especially suitable for the thin coal seam shearer, and can provide a larger mining range for the thin coal seam shearer. 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,...

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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