Thin seam short-span coal mining machine

Abstract

The invention relates to a short-span coal mining machine for a thin coal seam, which comprises a front main body part shell and a rear main body part shell which are fixedly connected front and back, and two swing arm shells which are respectively hinged to the left end and the right end of the front main body part shell, the two ends of an arm frame extending left and right of the swing arm shell 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, a front arm overhanging leftwards or rightwards is arranged on the connecting arm, and a front pin shaft mounting hole and a rear pin shaft mounting hole are formed in the front portion of the high-speed end of the front arm and the front portion of the high-speed end of the arm frame respectively. An input end gear mounting hole is formed in the rear portion of the high-speed end of the arm frame, the front pin shaft mounting hole and the rear pin shaft mounting hole are coaxial with the input end gear, an oil cylinder containing cavity is formed below the front arm and the lower portion of the connecting arm, and the two ends of a height adjusting oil cylinder are hinged to the connecting arm and the front main body portion 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 coal shearer, especially a short-span coal shearer for a thin coal seam, which has a larger mining range and a 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 response to the above problems, the industry once propos...

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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