Swing arm and swing arm supporting structure of thin seam short-span coal mining machine

Abstract

The invention relates to a thin seam short-span coal mining machine swing arm and a swing arm supporting structure, a main body of a swing arm shell of the swing arm is an arm frame extending leftwards and rightwards, a connecting arm extending forwards is connected to the middle of the arm frame, a front arm is arranged on the connecting arm, and the front arm is located in front of the high-speed end of the arm frame; the front arm, the front part of the high-speed end of the arm frame and the rear part of the high-speed end of the arm frame are respectively provided with a front pin shaft mounting hole, a rear pin shaft mounting hole and an input end gear of the cutting transmission mechanism, which are coaxial with each other; the supporting structure comprises a front main body part shell, swing arms, cutting motors and a height adjusting oil cylinder, the left end and the right end of the front main body part shell are hinged to the swing arms with the cutting motors as pin shafts correspondingly, and output shafts of the cutting motors are in coaxial transmission connection with input end gears on the left side and the right side on the same side; and a height adjusting oil cylinder is hinged between the front arm of the swinging arm and the shell of the front main body part. The mining machine is compact in structure, a large mining range can be provided, and a short machine body length and a relatively clean oil cylinder installation space can be achieved.

Description

technical field [0001] The invention relates to a shearer swing arm and a height-adjusting oil cylinder installation structure of the swing arm, which is especially suitable for thin coal seam shearers, and helps to expand the mining range of thin coal seam shearers, shorten the length of the fuselage and improve suspension. The center of gravity of the fuselage. Background technique [0002] The cutting motor of existing thin coal seam shearer is usually positioned on the swing arm, and swings with the swing of the swing arm. When the rear swing arm of this kind of 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 rear swing arm cuts the motor 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 t...

AI Technical Summary

Problems solved by technology

When the rear swing arm of this kind of 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 rear swing arm cuts the motor 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

[0004] At the same time, since the support cylinder of the existing structure is installed in an open space, coal and rocks are accumulated on the top and bottom of the support cylinder during work, especially the accumulation of coal and rock between the support cylinder and the body shell of the shearer will cause the cylinder to swing limited, As a result, the mining height is not as high as the theoretical mining requirements, and some even directly cut off the oil cylinder, etc.

Moreover, the existing method of setting oil cylinders in the left and right longitudinal directions of the shearer fuselage further leads to the lengthening of the fuselage, which in turn makes the center of gravity of the suspended fuselage biased towards the coal wall.

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