Swing arm and swing arm supporting structure of thin seam compact coal mining machine

Abstract

The invention relates to a thin seam compact type 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 left and right, a connecting arm extending forwards is connected to the middle of the arm frame, a front arm and a rear arm are arranged in front of and behind the arm frame respectively, and the root of the front arm is connected to the connecting arm; the front arm and the rear arm are respectively provided with a hinged connection hole used for being hinged with a machine body, a rear-stage cutting transmission mechanism is arranged in the arm frame, and an input end gear is coaxial with the hinged connection hole; the supporting structure comprises a front main body part shell, a rear main body part shell, a height adjusting oil cylinder and a swinging arm, the front arm and the rear arm are hinged to the front main body part shell and the rear main body part shell respectively, an output end gear of a front-stage cutting transmission mechanism in the front main body part shell is in coaxial transmission connection with an input end gear of a rear-stage cutting transmission mechanism, and the height adjusting oil cylinder is hinged between the connecting arm and the front main body part shell. The structure is compact, a large mining range can be provided, the length of the machine body is short, and the gravity center of the machine body is improved.

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 cannot meet the theoretical mining requirements, and some even directly lead to the failure of 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 prominence of the lengthening of the fuselage and the deviation of the center of gravity of the suspended fuselage to the coal wall

Images