Swing arm of thin seam mining machine

Abstract

The invention relates to a swing arm of a thin seam mining machine, which comprises a swing arm shell, the main body of the swing arm shell is an arm frame extending left and right, a cutting transmission mechanism is arranged in the arm frame, and the ends of an input end gear and an output end gear of the cutting transmission mechanism are respectively used as the high-speed end and the low-speed end of the arm frame. 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 overhanging leftwards or rightwards from the connecting arm are arranged on the connecting arm, and the high-speed end of the front arm, the high-speed end of the rear arm and the high-speed end of the arm frame are parallel to one another and 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 an input end gear of the cutting transmission mechanism. 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 present invention relates to a shearer rocker structure, particularly suitable for thin coal seam shearers, helps to provide a large mining range and a large cutting power for thin coal seam shearers. Background [0002] On existing thin-seam shearers, the cutting motor is usually located on the rocker arm and oscillates with the swing arm. When the back swing arm of this thin coal seam suspension fuselage shearer is mined in the direction of travel, there will be a problem that the height of the rear drum is too small, because when the mining height is increased, the rear rocker arm cutting motor will interfere with the upper coal table left behind the front drum cutting bottom knife, so the overall mining height of this shearer is too narrow, and it cannot adapt to the mining requirements of the large change in the thickness of the ore layer of the working surface of the thin coal seam in China. [0003] In view of the above problems, the industry ha...

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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