Swing arm shell of short-span coal mining machine for thin coal seam

Abstract

The invention relates to a thin seam short-span coal mining machine swing arm shell, a main body of the shell is an arm frame extending left and right, a transmission cavity used for installing a cutting transmission mechanism is arranged in the arm frame, and the left end and the right end of the arm frame are respectively a high-speed end and a low-speed end. An input end gear mounting hole and an output end gear mounting hole are formed in the rear portion of the high-speed end of the arm frame and the low-speed end of the arm frame respectively, a connecting arm overhanging forwards from the arm frame is arranged in the middle of the arm frame, and a front arm overhanging leftwards or rightwards from the connecting arm is arranged on the connecting arm. The front parts of the high-speed ends of the front arm and the arm frame are respectively provided with a front pin shaft mounting hole and a rear pin shaft mounting hole which are used for mounting the cutting motor as a pin shaft; and the front pin shaft mounting hole, the rear pin shaft mounting hole and the input end gear mounting hole are coaxial. 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 swing arm shell of a shearer, which is especially suitable for a shearer with a short span in a thin coal seam, and can provide a larger mining range for the 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 ...

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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