Cutting mechanism of thin seam mining machine

Abstract

The invention relates to a cutting mechanism of a thin seam mining machine, which is characterized in that a swing arm shell is hinged with a main body shell by taking a cutting motor as a pin shaft, the cutting motor is fixed relative to the main body shell, the main body of the swing arm shell is an arm frame extending left and right, and a connecting arm overhanging forwards from the arm frame is arranged in the middle of the arm frame; a front arm and a rear arm which overhang leftwards or rightwards are arranged on the connecting arm, the front arm, the rear arm and the high-speed end of the arm frame are sequentially arranged at intervals from front to back, the front arm and the rear arm are hinged to a first lug base, a second lug base and a third lug base on the front portion of the main body shell, and loads from the roller are transmitted to the main body shell. An input end gear of a cutting transmission mechanism installed in the high-speed end of the arm frame is in coaxial transmission connection with an output shaft of the cutting motor, a height adjusting oil cylinder is arranged in an inner cavity in the front portion of the main body shell, and the two ends of the height adjusting oil cylinder are hinged to the front arm and the main body shell respectively. A large mining range can be provided, the machine body can be shortened, and the gravity center of the coal mining machine is 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 the thin coal seam shearer with a larger mining range and larger 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 respo...

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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