Compact coal mining machine for thin coal seam

Abstract

The invention relates to a thin seam compact coal mining machine which comprises a machine body and two swing arm shells hinged to the left end and the right end of the machine body respectively, the two ends of an arm frame extending leftwards and rightwards of the swing arm shells are the high-speed end and the low-speed end respectively, a connecting arm overhanging forwards from the arm frame is arranged in the middle of the arm frame, and a front arm and a rear arm are arranged on the front portion and the rear portion of the arm frame respectively. The root of the front arm is connected to the connecting arm, the front arm and the rear arm are hinged to the machine body, an input end gear of a rear-stage cutting transmission mechanism installed in the arm frame is in coaxial transmission connection with an output end gear of a front-stage cutting transmission mechanism installed in the machine body, an oil cylinder outer containing cavity is formed in the lower portion of the connecting arm, and an oil cylinder inner containing cavity is formed in the lower portion of the machine body. The height adjusting oil cylinder is located in the oil cylinder outer containing cavity and the oil cylinder inner containing cavity, and the two ends of the height adjusting oil cylinder are hinged to the connecting arm and the machine body respectively. The coal mining machine can provide a larger mining range, has a more compact machine body, and can improve the gravity center problem of the coal mining machine.

Description

technical field [0001] The invention relates to a coal shearer, especially a compact coal shearer for thin coal seams, which has a larger mining range, a shorter fuselage and better stress stability of the whole machine. 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 ab...

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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