Coal mining machine suitable for mining ultra-thin coal seam

Abstract

The utility model discloses a coal mining machine suitable for mining an ultra-thin coal seam. The coal mining machine comprises an electric cabinet, semi-suspended traction parts fixedly arranged at the two ends of the electric cabinet, a U-shaped rocker arm rotationally connected to the semi-suspended traction parts through a rotating shaft, and a mining roller rotationally connected to the U-shaped rocker arm, a plurality of mining cutting teeth are mounted on the mining roller; the mining cutting teeth are connected with the mining roller through a vibration excitation mechanism, the vibration excitation mechanism comprises a vibration excitation mechanism fixing pipe, a vibration excitation driving rod is slidably connected into the vibration excitation mechanism fixing pipe, and the mining cutting teeth are fixedly installed at the outer end of the vibration excitation driving rod; the structure of the roller is optimized, the mining cutting teeth belong to quick-wear parts in the working process, and the mining cutting teeth are convenient to disassemble and replace, so that the downtime is shortened, and the working efficiency is improved; the mining cutting teeth are subjected to reinforced design, and the shock excitation mechanism is used for providing impact vibration for the mining cutting teeth, so that the mining cutting teeth can more efficiently crush and mine a coal seam in the coal seam mining process, and the coal mining efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a coal shearer suitable for the mining of extremely thin coal seams. Background Art

[0002] The mining of thin and extremely thin coal seams in China has successively experienced such technological methods as blasting mining, coal cutting machine combined with blasting mining, ordinary mechanized mining and fully mechanized mining. However, for a long time, the mining and utilization of thin and extremely thin coal seams have not been prosperous. Especially for extremely thin coal seams with a thickness less than 0.8 m, due to the narrow working space, the mining equipment is required to be small in size, and must be reliable in performance and strong in adaptability, resulting in very difficult mechanized mining. At the same time, the mining of thin coal seams requires a large amount of human resources, with low efficiency and high cost. Therefore, some coal mines have abandoned the mining of this part of the coal seams in the past, causing huge waste of coal resources. The existing coal shearers for the mining of extremely thin coal seams still need to be further improved in terms of mining efficiency. Content of the Utility Model

[0003] The purpose of the utility model is to provide a coal shearer suitable for the mining of extremely thin coal seams, which can more efficiently carry out the mining work of extremely thin coal seams.

[0004] To achieve the above purpose, the utility model provides the following technical solutions:

[0005] A coal shearer suitable for the mining of extremely thin coal seams includes an electric control box, semi-suspension traction parts fixedly installed at both ends of the electric control box, a U-shaped rocker arm rotatably connected to the semi-suspension traction parts through a rotating shaft, a mining drum rotatably connected to the U-shaped rocker arm, a mining conveying blade fixed on the outside of the mining drum and spirally extending around its axis, and a plurality of mining cutting teeth fixedly installed on the mining conveying blade.

[0006] Preferably, the mining cutting teeth are connected to the mining drum through a vibration excitation mechanism. The vibration excitation mechanism includes a plurality of vibration excitation mechanism fixed pipes arranged along the path of the mining conveying blade. The vibration excitation mechanism fixed pipes are fixedly connected to the mining drum, and the other ends of the vibration excitation mechanism fixed pipes extend into the mining drum;

[0007] A vibration excitation drive rod is slidably connected in the vibration excitation mechanism fixed pipe. An end sliding column is fixed to the outer end of the vibration excitation drive rod. The end sliding column is slidably connected in the vibration excitation mechanism fixed pipe. The mining cutting teeth are fixedly installed on the end sliding column. A vibration excitation drive hammer is fixed to one end of the vibration excitation drive rod located inside the mining drum.

[0008] Explanation: The mining cutting teeth are intensively designed, and the vibration excitation mechanism is used to provide impact vibration for the mining cutting teeth, so that the mining cutting teeth can more efficiently crush and mine the coal seam during the coal seam mining process, improving the coal mining efficiency.

[0009] Preferably, a limit sliding ring is fixed on the excitation drive rod, two limit fixing rings are fixed in the fixed tube of the excitation mechanism, the limit sliding ring is located between the two limit fixing rings, a limit support spring is arranged between the limit sliding ring and the limit fixing rings in a pressing fit manner, a one-way limit ring is fixed in the fixed tube of the excitation mechanism, and the one-way limit ring presses and supports on the end face of the end sliding column.

[0010] Note: By using the one-way limit ring to press and support on the end face of the end sliding column, the reverse sliding of the mining cutting tooth is avoided, which affects the mining force. The limit support spring can reduce the adverse vibration generated during the mining process.

[0011] Preferably, the mining cutting tooth is connected to the end sliding column through a quick-release mechanism. The quick-release mechanism includes a quick-release connection column fixed on the mining cutting tooth. The end sliding column has a quick-release connection hole coaxial with it, and the quick-release connection column is threadedly connected in the quick-release connection hole;

[0012] The outer side of the end sliding column has a radial constraint hole communicating with the quick-release connection hole. The quick-release connection column has a radial constraint cooperation hole extending along its radial direction. A radial constraint screw is threadedly fixed in the radial constraint hole and the radial constraint cooperation hole together.

[0013] Note: The mining cutting tooth is a vulnerable part during work. The mining cutting tooth that is convenient for disassembly and replacement is beneficial to reducing the downtime and improving the work efficiency.

[0014] Compared with the prior art, the beneficial effects of the present utility model are reflected in the following aspects:

[0015] 1. The structure of the present utility model is reasonably designed, the drum structure is optimized. The mining cutting tooth is a vulnerable part during work. The mining cutting tooth that is convenient for disassembly and replacement is beneficial to reducing the downtime and improving the work efficiency;

[0016] 2. The present utility model is convenient to operate. The mining cutting tooth is intensively designed. The excitation mechanism is used to provide impact vibration for the mining cutting tooth, so that the mining cutting tooth can more efficiently crush and mine the coal seam during the coal seam mining process, improving the coal mining efficiency;

[0017] 3. The overall structure of the present utility model is compactly designed, and the overall center of gravity of the shearer is relatively low, which is suitable for the mining work of extremely thin coal seams. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view of the present utility model;

[0019] Figure 2 is the structural schematic diagram of the excitation mechanism of the present utility model;

[0020] Figure 3 is the structural schematic diagram of the quick-release mechanism of the present utility model.

[0021] In the figure, 10 is the electric control box, 11 is the semi - suspended traction unit, 12 is the U - shaped rocker arm, 13 is the mining drum, 131 is the mining conveying blade, 132 is the mining cutting tooth, 14 is the vibration excitation mechanism, 141 is the vibration excitation mechanism fixing pipe, 142 is the vibration excitation driving rod, 143 is the end sliding column, 144 is the limit sliding ring, 145 is the limit fixing ring, 146 is the limit support spring, 15 is the quick - release mechanism, 151 is the quick - release connecting column, 152 is the quick - release connecting hole, 153 is the radial constraint hole, 154 is the radial constraint mating hole, 155 is the radial constraint screw. Detailed implementation mode

[0022] The following combines Figures 1-3 to elaborate on the present utility model in detail. For the convenience of narration, the orientations mentioned below are defined as follows: The up - down, left - right, front - back directions mentioned below are consistent with the up - down, left - right, front - back directions of the projection relationship of each main view or structural schematic diagram itself.

[0023] Embodiment:

[0024] A coal shearer adapted to the mining of extremely thin coal seams, as Figure 1 shown, includes an electric control box 10, a semi - suspended traction unit 11 fixedly installed at both ends of the electric control box 10, a U - shaped rocker arm 12 rotatably connected to the semi - suspended traction unit 11 through a rotating shaft, and a mining drum 13 rotatably connected to the U - shaped rocker arm 12;

[0025] On the outside of the mining drum 13, a mining conveying blade 131 spirally extending along its axis is fixed, and a plurality of mining cutting teeth 132 are fixedly installed on the mining conveying blade 131.

[0026] As Figure 1 shown, the mining cutting teeth 132 are connected to the mining drum 13 through a vibration excitation mechanism 14. As Figure 2 shown, the vibration excitation mechanism 14 includes a plurality of vibration excitation mechanism fixing pipes 141 arranged along the path of the mining conveying blade 131. The vibration excitation mechanism fixing pipes 141 are fixedly connected to the mining drum 13, and the other ends of the vibration excitation mechanism fixing pipes 141 extend into the interior of the mining drum 13;

[0027] A vibration excitation driving rod 142 is slidably connected in the vibration excitation mechanism fixing pipe 141. An end sliding column 143 is fixed to the outer end of the vibration excitation driving rod 142. The end sliding column 143 is slidably connected in the vibration excitation mechanism fixing pipe 141. The mining cutting teeth 132 are fixedly installed on the end sliding column 143. A vibration excitation driving hammer 140 is fixed to one end of the vibration excitation driving rod 142 inside the mining drum 13.

[0028] As Figure 2As shown, a limiting sliding ring 144 is fixed on the excitation driving rod 142, two limiting fixing rings 145 are fixed in the fixing tube 141 of the excitation mechanism, the limiting sliding ring 144 is located between the two limiting fixing rings 145, a limiting support spring 146 is provided between the limiting sliding ring 144 and the limiting fixing ring 145, and a one-way limiting ring 147 is fixed in the fixing tube 141 of the excitation mechanism, and the one-way limiting ring 147 is supported on the end face of the end sliding column 143 by pressing.

[0029] like Figure 3 As shown, the mining cutting tooth 132 is connected to the end sliding column 143 through a quick release mechanism 15, and the quick release mechanism 15 includes a quick release connection column 151 fixed on the mining cutting tooth 132, and the end sliding column 143 has a quick release connection hole 152 coaxial therewith, the quick release connection column 151 is processed with an external thread, and the quick release connection hole 152 is processed with an internal thread, and the quick release connection column 151 is threadedly connected in the quick release connection hole 152;

[0030] The outer side of the end sliding column 143 is provided with a radial constraint hole 153 which is connected with the quick-release connecting hole 152. The radial constraint hole 153 is arranged along the radial extension of the end sliding column 143. The quick-release connecting column 151 is provided with a radial constraint fitting hole 154 which extends along its radial direction. The radial constraint fitting hole 154 is processed with an internal thread. A radial constraint screw 155 is threadedly fixed in the radial constraint hole 153 and the radial constraint fitting hole 154.

[0031] In the actual application process of the utility model, the U-shaped rocker arm 12 is built with a drive motor and a gearbox, and the power of the drive motor is transmitted to the mining drum 13 after the gearbox changes speed and torque, driving the mining drum 13 to rotate, and the mining cutting teeth 132 on the mining drum 13 are used to crush and mine the coal seam;

[0032] When the mining cutting tooth 132 needs to be replaced, the radial constraint screw 155 is first removed, and then the quick-release connection column 151 is removed from the quick-release connection hole 152, and the old mining cutting tooth 132 can be removed, and then the new mining cutting tooth 132 is installed on the end sliding column 143, and finally the quick-release connection column 151 is constrained and fixed with the radial constraint screw 155;

[0033] During the coal seam mining process, the vibration driving hammer 140 can generate reciprocating vibrations along the axis direction of the vibration driving rod 142. This reciprocating vibration energy will be transmitted to the mining cutting tooth 132 at the end through the vibration driving rod 142 and the end sliding column 143. This vibration energy is used to assist in crushing the coal seam and improve mining efficiency.

Claims

1. A coal mining machine suitable for mining extremely thin coal seams, characterized in that: It comprises an electric control box (10), a semi-suspended traction part (11) fixedly mounted on both ends of the electric control box (10), a U-shaped rocker arm (12) rotatably connected to the semi-suspended traction part (11) via a rotating shaft, and a mining roller (13) rotatably connected to the U-shaped rocker arm (12); A mining conveying blade (131) spirally extending around the axis of the mining roller (13) is fixed on the outer side of the mining roller (13), and a plurality of mining cutting teeth (132) are fixedly mounted on the mining conveying blade (131); The mining cutting teeth (132) are connected to the mining drum (13) via a vibration mechanism (14); the vibration mechanism (14) comprises a plurality of vibration mechanism fixing tubes (141) arranged along the path of the mining conveying blades (131); the vibration mechanism fixing tubes (141) are fixedly connected to the mining drum (13), and the other end of the vibration mechanism fixing tubes (141) extends into the interior of the mining drum (13); An excitation drive rod (142) is slidably connected in the excitation mechanism fixed tube (141), an end sliding column (143) is fixed to the outer end of the excitation drive rod (142), the end sliding column (143) is slidably connected in the excitation mechanism fixed tube (141), and the mining cutting tooth (132) is fixedly mounted on the end sliding column (143); An excitation driving hammer (140) is fixed to one end of the excitation driving rod (142) located inside the mining drum (13); A limit sliding ring (144) is fixed on the excitation driving rod (142), two limit fixing rings (145) are fixed in the excitation mechanism fixing tube (141), the limit sliding ring (144) is located between the two limit fixing rings (145), a limit support spring (146) is provided between the limit sliding ring (144) and the limit fixing ring (145), and a one-way limit ring (147) is fixed in the excitation mechanism fixing tube (141), and the one-way limit ring (147) is supported by pressing on the end face of the end sliding column (143).

2. A coal mining machine suitable for mining extremely thin coal seams according to claim 1, characterized in that: The mining cutting tooth (132) is connected to the end sliding column (143) via a quick-release mechanism (15), the quick-release mechanism (15) comprising a quick-release connecting column (151) fixed on the mining cutting tooth (132), the end sliding column (143) having a quick-release connecting hole (152) coaxial therewith, the quick-release connecting column (151) being threadedly connected to the quick-release connecting hole (152); The outer side of the end sliding column (143) has a radial constraint hole (153) communicating with the quick-release connection hole (152); the quick-release connection column (151) has a radial constraint matching hole (154) extending in its radial direction; and a radial constraint screw (155) is threadedly fixed in the radial constraint hole (153) and the radial constraint matching hole (154).

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