Swing arm shell of thin seam mining machine

Abstract

A main body of the swing arm shell is an arm support extending leftwards and rightwards, a transmission cavity used for installing a cutting transmission mechanism is formed in the arm support, and an input end gear installation hole and an output end gear installation hole are formed in the two ends of the transmission cavity respectively. The ends where the input end gear mounting hole and the output end gear mounting hole are located are the high-speed end and the low-speed end of the arm support respectively, a connecting arm overhanging forwards from the arm support is arranged in the middle of the arm support, a front arm and a rear arm overhanging leftwards or rightwards from the connecting arm are arranged on the connecting arm, and the front arm, the rear arm and the high-speed end of the arm support are sequentially arranged at intervals from front to back. The front arm and the rear arm 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 and the rear pin shaft mounting hole are coaxial with the input end gear mounting hole. According to the invention, a larger mining range 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 swing arm casing, which is especially suitable for thin coal seam shearers, and helps to provide the thin coal seam shearers with a larger mining range and shorten the shearer body. 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...

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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