Cutting device, coal mining machine and coal mining system

Abstract

The invention discloses a cutting device, a coal mining machine and a coal mining system.The cutting device comprises a roller and a plurality of first cutting teeth, the first cutting teeth are arranged on the end face of the first end of the roller at intervals, an included angle is formed between the central axis of each first cutting tooth and the axial direction of the roller, and the included angle is larger than or equal to 25 degrees; compared with the first cutting teeth far away from the central axis of the roller, the included angle between the central axis of the first cutting teeth close to the central axis of the roller and the axial direction of the roller is smaller. Thus, the cutting feed end of the cutting device provided by the embodiment of the invention is provided with the first cutting teeth with different inclination angles, multi-angle destructive force can be generated on the coal wall during cutting, the coal wall can be more efficiently destroyed and cut, the coal mining speed and the coal mining efficiency are greatly improved, and in addition, the coal cutting efficiency is improved. The cutting device provided by the embodiment of the invention is high in cutting strength and suitable for cutting harder coal rocks.

Description

Technical Field

[0001] The invention belongs to the technical field of coal mine mechanical equipment, and in particular relates to a cutting device, a coal mining machine and a coal mining system. Background Art

[0002] Thin coal seams refer to coal seams with a thickness of 1.0-1.3m, accounting for 18% of the total coal reserves. The traditional methods of mining thin coal seams are blasting and general mining, which are inefficient and unsafe. The more common thin coal seam mining technologies include coal plow mining technology and comprehensive mechanized coal mining technology, but the coal plow has the disadvantages of low cutting hardness and poor efficiency, and the above coal mining technologies are not very suitable for cutting harder coal rocks, and the cutting efficiency is low. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a cutting device.

[0004] An embodiment of the present invention further provides a coal mining machine.

[0005] An embodiment of the present invention further provides a coal mining system.

[0006] The cutting device of the embodiment of the present invention includes: a drum; a plurality of first cutting teeth, wherein the plurality of first cutting teeth are arranged at intervals on the end surface of the first end of the drum, an angle is formed between the central axis of the first cutting teeth and the axial direction of the drum, and the angle is greater than or equal to 25°, and compared with the first cutting teeth far away from the central axis of the drum, the angle between the central axis of the first cutting teeth close to the central axis of the drum and the axial direction of the drum is smaller.

[0007] The cutting device provided by the embodiment of the present invention comprises a drum and a plurality of first cutting teeth, wherein the plurality of first cutting teeth are arranged on the end surface of the first end of the drum, and the central axis of the plurality of first cutting teeth has a plurality of different angles with the axial direction of the drum, and the angle is greater than or equal to 25°. Thus, the first cutting teeth with different inclination angles at the feed end of the cutting device provided by the embodiment of the present invention can generate multi-angle destructive force on the coal wall during cutting, destroy the coal wall more efficiently, cut the coal wall, and greatly improve the coal mining speed and efficiency. In addition, the cutting device provided by the embodiment of the present invention has a strong cutting force and is suitable for cutting harder coal rocks.

[0008] In some embodiments, the plurality of first cutting teeth are arranged in a spiral pattern with the central axis of the drum as the center, and the angle between the central axis of the first cutting teeth and the axial direction of the drum gradually increases from the inside to the outside.

[0009] In some embodiments, the plurality of first cutting teeth are divided into a plurality of groups, each group of first cutting teeth includes a plurality of first cutting teeth, and the plurality of first cutting teeth are arranged in a spiral from the inside to the outside, and the plurality of first cutting teeth are rotationally symmetrical with the central axis of the drum as the center line, and in the direction from the inside to the outside, the angle between the central axis of the first cutting teeth and the axial direction of the drum gradually increases.

[0010] In some embodiments, the plurality of first cutting teeth are divided into 3-4 groups, and each group of first cutting teeth includes 4-8 first cutting teeth.

[0011] In some embodiments, the end face of the first end of the drum is a plane perpendicular to the central axis of the drum, and the tooth tips of the plurality of first cutting teeth are located on a first arc surface, which is an arc surface protruding in a direction away from the end face of the first end of the drum.

[0012] In some embodiments, the end surface of the first end of the roller is an arc surface protruding in the direction away from the second end of the roller, and the tooth tips of multiple first cutting teeth are located on the first arc surface, and the first arc surface is an arc surface protruding in the direction away from the end surface of the first end of the roller.

[0013] In some embodiments, the angle between the central axis of the first cutting tooth and the axial direction of the drum is 30°-60°.

[0014] In some embodiments, the cutting device further comprises:

[0015] A plurality of second cutting teeth, wherein the plurality of second cutting teeth are arranged at intervals on the outer peripheral surface of the drum; and / or,

[0016] A plurality of third cutting teeth are provided at intervals around the plurality of first cutting teeth along the circumferential direction of the drum.

[0017] Another aspect of the present invention provides a coal mining machine, comprising: a frame; a cutting device, the cutting device being the cutting device described in any one of the above embodiments, the cutting device being arranged on the frame, and the drum of the cutting device being arranged horizontally; and a driving device, the driving device being arranged on the frame, and the driving device being used to drive the cutting device to rotate.

[0018] Another aspect of the present invention provides a coal mining system, comprising: a coal mining machine, which is the coal mining machine described in the above embodiment; and a traction system, which is connected to the coal mining machine and is used to pull the coal mining machine to move along a working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a cutting device for a thin coal seam shearer according to an embodiment of the present invention.

[0020] Figure 2 It is another schematic diagram of the thin coal seam shearer cutting device according to an embodiment of the present invention.

[0021] Figure 3 It is a top view of the thin coal seam shearer cutting device according to an embodiment of the present invention.

[0022] Figure 4 It is a front view of a cutting device for a thin coal seam shearer according to an embodiment of the present invention.

[0023] Reference numerals:

[0024] Cutting device 100,

[0025] Drum 1 , first end 11 , second end 12 , first cutting teeth 2 , second cutting teeth 3 , third cutting teeth 4 , fourth cutting teeth 5 , spiral blades 6 , annular end plate 7 , through groove 71 . DETAILED DESCRIPTION

[0026] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0027] According to the following Figure 1-Figure 4 The cutting device 100 according to the embodiment of the present invention is described. The cutting device 100 includes a drum 1 and a plurality of first cutting teeth 2 .

[0028] The drum 1 has a first end 11 and a second end 12 opposite to each other in the axial direction. When the drum 1 is fed, the drum 1 is generally arranged horizontally, that is, the central axis of the drum 1 extends in the horizontal direction, and the central axis of the drum 1 is substantially perpendicular to the coal wall, wherein the first end 11 of the drum 1 faces the coal wall, that is, the first end 11 of the drum 1 is close to the coal wall, the second end 12 of the drum is away from the coal wall, and the first end 11 of the drum 1 moves in a direction close to the coal wall.

[0029] A plurality of first cutting teeth 2 are arranged at intervals on the end face of the first end 11 of the drum 1, and the tooth tips of the first cutting teeth 2 are facing in a direction away from the end face of the first end 11 of the drum 1, that is, toward the coal wall, so that when the cutting device 100 advances, the tooth tips of the first cutting teeth 2 contact the coal wall, the drum 1 rotates, and the first cutting teeth 2 destroy the coal seam on the coal wall.

[0030] There is an angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1, and the angle is greater than or equal to 25°. When performing cutting operations, the first cutting tooth 2 rotates with the drum 1 under the action of the drum 1. The first cutting tooth 2, which is tilted relative to the axial direction of the drum 1, has a stronger cutting strength, which effectively improves the cutting efficiency. When the angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1 is greater than or equal to 25°, the first cutting tooth 2 has an excellent cutting effect. As the drum 1 rotates, the first cutting tooth 2 cuts into the coal wall and crushes the coal wall. If the angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1 is less than 25°, the destructive performance of the first cutting tooth 2 on the coal wall may not be strong enough, affecting the cutting effect and cutting efficiency.

[0031] There are various angles between the central axes of the plurality of first cutting teeth 2 and the axial direction of the drum 1, that is, among the plurality of first cutting teeth 2, at least two of the central axes of the first cutting teeth have different angles with the axial direction of the drum 1, that is, the inclination angles of the plurality of cutting teeth 2 are different. In this way, the cutting device 100 with the first cutting teeth 2 having various inclination angles can generate destructive forces of various angles on the coal wall during the cutting operation, and can destroy the coal wall more quickly and easily, with excellent cutting effect, and greatly improved cutting efficiency.

[0032] The cutting device provided by the embodiment of the present invention comprises a drum and a plurality of first cutting teeth, wherein the plurality of first cutting teeth are arranged on the end surface of the first end of the drum, and the central axis of the plurality of first cutting teeth has a plurality of different angles with the axial direction of the drum, and the angle is greater than or equal to 25°. Thus, the first cutting teeth with different inclination angles at the feed end of the cutting device provided by the embodiment of the present invention can generate multi-angle destructive force on the coal wall during cutting, destroy the coal wall more efficiently, cut the coal wall, and greatly improve the coal mining speed and efficiency. In addition, the cutting device provided by the embodiment of the present invention has a strong cutting force and is suitable for cutting harder coal rocks.

[0033] In some embodiments, the angle between the axis of the first cutting tooth 2 near the center axis of the drum 1 and the axial direction of the drum 1 is smaller than the angle between the axis of the first cutting tooth 2 near the center axis of the drum 1 and the axial direction of the drum 1. The direction near the center axis of the drum 1 is defined as the "inner" direction, and the direction away from the center axis of the drum 1 is defined as the "outer" direction, that is, the angle between the center axis of the first cutting tooth 2 located on the inside and the axial direction of the drum 1 is smaller than the angle between the center axis of the first cutting tooth 2 located on the outside and the axial direction of the drum 1.

[0034] The angle between the central axis of the first cutting tooth 2 located on the inner side and the axial direction of the drum 1 is made smaller. The feeding performance of the first cutting tooth 2 with a smaller angle is better, and it mainly plays the function of "drilling into" the coal wall. The angle between the central axis of the first cutting tooth 2 located on the outer side and the axial direction of the drum 1 is made larger. Since the first cutting tooth 2 with a larger angle has a certain distance from the central axis of the drum 1, it has better cutting performance as the drum 1 rotates, and it mainly plays the function of "crushing" the coal wall, breaking up the coal blocks and exporting them. By setting multiple first cutting teeth 2 in this way, the cutting effect of the cutting device 100 can be further improved, and the coal mining speed and efficiency can be increased.

[0035] In the embodiment of the present invention, the arrangement of the plurality of first cutting teeth 2 provided on the end surface of the first end of the drum 1 may be any of the following.

[0036] In one embodiment of the present invention, the plurality of first cutting teeth 2 are arranged in a spiral with the central axis of the drum 1 as the center. For example, the plurality of first cutting teeth 2 are arranged in a spiral line from a position close to the central axis of the drum 1 to the outside. The plurality of first cutting teeth 2 are arranged in a spiral, which is conducive to smoothly guiding the cut coal blocks from the inside to the outside, avoiding the coal blocks from being unable to be output in time and generating a large resistance, which slows down the cutting process of the cutting device. Therefore, the plurality of first cutting teeth 2 are arranged in a spiral, which is conducive to speeding up the cutting speed and improving the cutting efficiency.

[0037] Preferably, when the cutting device 100 is in the feeding operation, the rotation direction of the drum 1 conforms to the spiral direction of the plurality of first cutting teeth 2, so that the cutting operation can be carried out more smoothly.

[0038] In addition, in the direction from inside to outside, the angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1 gradually increases. In other words, the angle between the central axis of the first cutting tooth 2 located on the inside and the axial direction of the drum 1 is smaller than the angle between the central axis of the first cutting tooth 2 located on the outside and the axial direction of the drum 1. The first cutting teeth with different inclination angles can generate multi-angle destructive forces on the coal wall during cutting, destroy the coal wall more efficiently, cut the coal wall, and greatly improve the coal mining speed and efficiency.

[0039] In another embodiment of the present invention, Figure 4As shown, the multiple first cutting teeth 2 are divided into multiple groups, each group of first cutting teeth includes multiple first cutting teeth 2, and the multiple first cutting teeth 2 in each group are arranged in a spiral from the inside to the outside, that is, the multiple first cutting teeth 2 in each group are arranged in sequence along the spiral line from the inside of the center axis of the drum 1. The multiple groups of first cutting teeth are rotationally symmetrical with the center axis of the drum 1 as the center line. Such an arrangement of multiple first cutting teeth 2 effectively avoids the coal blocks from being unable to be output in time and generating greater resistance, resulting in a slowdown in the cutting process of the cutting device, which is conducive to smoothly guiding the cut coal blocks from the inside to the outside, accelerating the cutting speed, and improving the cutting efficiency.

[0040] In addition, in the direction from inside to outside, the angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1 gradually increases. In other words, the angle between the central axis of the first cutting tooth 2 located on the inside and the axial direction of the drum 1 is smaller than the angle between the central axis of the first cutting tooth 2 located on the outside and the axial direction of the drum 1. The first cutting teeth with different inclination angles can generate multi-angle destructive forces on the coal wall during cutting, destroy the coal wall more efficiently, cut the coal wall, and greatly improve the coal mining speed and efficiency.

[0041] Optionally, the plurality of first cutting teeth 2 are divided into 3-4 groups, each group of first cutting teeth includes 4-8 first cutting teeth 2. Too many groups (eg, more than 4 groups) will result in each group of first cutting teeth being arranged too closely, which is not conducive to the export of coal blocks.

[0042] As an example, Figure 4 As shown, the multiple first cutting teeth 2 of the cutting device 100 are divided into three groups, each group of first cutting teeth includes 5 first cutting teeth 2, and the 5 first cutting teeth 2 in each group of first cutting teeth are arranged in sequence from the inner side of the central axis of the drum 1 along the spiral line outward, and the three groups of first cutting teeth are rotationally symmetrical with the central axis of the drum 1 as the center line. There is a gap between two adjacent groups of first cutting teeth in the circumferential direction of the drum 1 to guide the cut coal blocks to be smoothly discharged from the inside to the outside, effectively avoiding the coal blocks that cannot be discharged in time and generate greater resistance, resulting in the slowing down of the cutting process of the cutting device.

[0043] Understandably, Figure 4 The illustrated embodiment is only an example of the present invention. In other embodiments, the plurality of first cutting teeth 2 of the cutting device 100 may have other grouping arrangements.

[0044] Preferably, when the cutting device 100 is in the cutting operation, the rotation direction of the drum 1 follows the spiral direction of the first cutting teeth 2, so that the cutting operation can be carried out more smoothly.

[0045] In some embodiments, Figure 1-Figure 4As shown, the end face of the first end 11 of the drum 1 is a plane perpendicular to the central axis of the drum 1, and the multiple first cutting teeth 2 arranged on the end face of the first end of the drum 1 are arranged with different inclination angles and / or different lengths, so that the tooth tips of the multiple first cutting teeth 2 are located on the first arc surface, and the first arc surface is an arc surface protruding in the direction away from the end face of the first end of the drum 1.

[0046] It should be noted that the present invention is not limited thereto. In other optional embodiments, the end surface of the first end 11 of the drum 1 may be a curved surface protruding in a direction away from the second end 12 of the drum 1, and the plurality of first cutting teeth 2 arranged on the end surface of the first end of the drum 1 may also be arranged with different inclination angles and / or be arranged with different lengths, so that the tooth tips of the plurality of first cutting teeth 2 are located on the first curved surface, and the first curved surface is a curved surface protruding in a direction away from the end surface of the first end of the drum 1.

[0047] Preferably, the angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1 is 30°-60°, so that the cutting effect of the first cutting tooth 2 can be optimized. If the angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1 is small (for example, less than 30°), the destructive force generated by the first cutting tooth 2 is limited, and the cutting effect may be limited to a certain extent. If the angle between the central axis of the first cutting tooth 2 and the axial direction of the drum 1 is large (for example, greater than 60°), it will have a certain impact on the feeding performance of the first cutting tooth 2, and may increase the rotation resistance of the drum 1, resulting in increased energy consumption and increased operating costs.

[0048] Therefore, the angle between the central axis of the multiple first cutting teeth 2 and the axial direction of the drum 1 is distributed between 30°-60°, and has a variety of angles of different sizes, which can balance the cutting performance and feed performance, while balancing the operating cost, and further improving the coal mining speed and efficiency.

[0049] In some embodiments, Figure 1-Figure 4 As shown, the cutting device 100 further includes an annular end plate 7 and a plurality of spiral blades 6, the spiral blades 6 are spirally wound on the outer circumference of the drum 1, and the plurality of spiral blades 6 are spaced apart in the circumferential direction of the drum 1. The annular end plate 7 is sleeved on the drum 1 and connected to the outer circumference of the drum 1, and the annular end plate 7 is adjacent to the first end of the drum 1. Figure 1-Figure 4 As shown, the annular end plate 7 is located on one side of the plurality of spiral blades 6 adjacent to the first end of the drum 1, and the annular end plate 7 is connected to the ends of the plurality of spiral blades 6 adjacent to the first end of the drum 1. Figure 4 As shown, a plurality of through grooves 71 are provided on the annular end plate 7 , and the plurality of through grooves 71 are arranged at intervals along the circumference of the annular end plate 7 . The plurality of through grooves 71 and the plurality of intervals formed between the plurality of spiral blades 6 are connected one by one in the axial direction of the drum 1 .

[0050] The annular end plate 7 can stabilize the multiple spiral blades 6 and improve the structural strength of the multiple spiral blades 6. The cut coal blocks can be respectively led out from the multiple through grooves 71 set on the annular end plate 7, and enter the corresponding intervals between the spiral blades 6, and are led out along the intervals, effectively avoiding the accumulation of coal blocks between the first end of the drum 1 and the coal wall, generating resistance and affecting the cutting efficiency. The spiral blades 6 are spirally wound on the outer circumferential surface of the drum 1, and the coal blocks can be smoothly led out in accordance with the rotation of the drum 1. Therefore, the cutting device 100 provided in the embodiment of the present invention has the advantage of high cutting efficiency.

[0051] like Figure 4 As shown, in an embodiment of the present invention, the through groove 71 is an arc-shaped groove, which extends along the circumference of the annular end plate 7 and has a certain length, so that it can better correspond to the interval between the spiral blades 6, avoid the annular end plate 7 from hindering the export of coal blocks, and promote the smooth export of coal blocks.

[0052] In some embodiments, Figure 1-Figure 3 As shown, the cutting device 100 also includes a plurality of second cutting teeth 3, and a plurality of second cutting teeth 3 are arranged at intervals on the end surface of each spiral blade 6 away from the outer peripheral surface of the drum 1, that is, the plurality of second cutting teeth 3 are divided into a plurality of groups and are sequentially arranged on the outer end surfaces of the plurality of spiral blades 6. The arrangement of the second cutting teeth 3 can cut the coal seam at more angles, further improving the cutting efficiency.

[0053] The tooth tip of the second cutting tooth 3 faces outwards and / or the tooth tip of the second cutting tooth 3 faces forwards. Here, "forwards" means that the tooth tip of the second cutting tooth 3 faces the direction of the feed.

[0054] Optionally, the tooth tip of the second cutting tooth 3 faces outward, and the central axis of the second cutting tooth 3 is perpendicular to the axial direction of the drum 1 .

[0055] Optionally, the tooth tip of the second cutting tooth 3 faces outward and forward, and there is a certain angle between the central axis of the second cutting tooth 3 and the axial direction of the drum 1, and the angle is less than 90 degrees.

[0056] Optionally, there is an angle between the central axis of the second cutting tooth 3 and the radial direction of the drum 1 .

[0057] exist Figure 1-Figure 4 In the illustrated embodiment, the tooth tip of the second cutting tooth 3 faces outward, the central axis of the second cutting tooth 3 is perpendicular to the axial direction of the drum 1 , and an angle is formed between the central axis of the second cutting tooth 3 and the radial direction of the drum 1 .

[0058] In some embodiments, Figure 1-Figure 4As shown, the cutting device 100 further includes a plurality of third cutting teeth 4, which are arranged at intervals on the outer peripheral surface of the annular end plate 7 along the circumferential direction of the annular end plate 7. The arrangement of the third cutting teeth 4 further improves the cutting efficiency.

[0059] The tooth tip of the third cutting tooth 4 faces outwards and / or the tooth tip of the third cutting tooth 4 faces forwards. Here, "forwards" means that the tooth tip of the third cutting tooth 4 faces the direction of the feed.

[0060] Optionally, the tooth tip of the third cutting tooth 4 faces outward, and the central axis of the third cutting tooth 4 is perpendicular to the axial direction of the drum 1 .

[0061] Optionally, the tooth tip of the third cutting tooth 4 faces outward and forward, and there is a certain angle between the central axis of the third cutting tooth 4 and the axial direction of the drum 1, and the angle is less than 90 degrees.

[0062] Optionally, there is an angle between the central axis of the third cutting tooth 4 and the radial direction of the drum 1 .

[0063] In some optional embodiments, the tooth tips of a portion of the plurality of third cutting teeth 4 face outward, the central axis of the third cutting teeth 4 is perpendicular to the axial direction of the drum 1, and an angle is formed between the central axis of the third cutting teeth 4 and the radial direction of the drum 1. The tooth tips of another portion of the plurality of third cutting teeth 4 face outward and forward, and an angle is formed between the central axis of the third cutting teeth 4 and the radial direction of the drum 1. With such an arrangement, the coal seam can be cut at more angles, further improving the cutting efficiency.

[0064] As an example, the plurality of third cutting teeth 4 are divided into a plurality of groups, and the plurality of groups of third cutting teeth 4 are arranged along the circumference of the annular end plate 7. Each group of third cutting teeth 4 includes a plurality of third cutting teeth 4, and the plurality of third cutting teeth 4 are sequentially arranged at intervals along the circumference of the annular end plate 7. Among the plurality of third cutting teeth 4 in each group of third cutting teeth 4, the angles between two adjacent third cutting teeth 4 and the axial direction of the drum 1 are different, specifically, as Figure 3 As shown, the directions of the tooth tips of several third cutting teeth 4 of each group of third cutting teeth 4 gradually move forward from outward along the circumferential direction of the drum 1 .

[0065] In some embodiments, Figure 1-Figure 4 As shown, the cutting device 100 further includes a plurality of fourth cutting teeth 5 , which are arranged on the end surface of the annular end plate 7 away from the spiral blade 6 , and are located between two adjacent through grooves 71 in the circumferential direction of the annular end plate 7 .

[0066] Specifically, Figure 4As shown, nine fourth cutting teeth 5 are provided on the end surface of the annular end plate 7 away from the spiral blade 6. The nine fourth cutting teeth 5 are divided into three groups, each group includes three fourth cutting teeth 5, and the three groups of fourth cutting teeth and three through grooves 71 are alternately distributed in the circumferential direction of the annular end plate 7, that is, the three fourth cutting teeth 5 in each group of fourth cutting teeth are located between two adjacent channels 71 in the circumferential direction of the annular end plate 7. Figure 4 As shown, nine fourth cutting teeth 5 are arranged around the first cutting teeth 2 .

[0067] like Figure 2 As shown, the tooth tips of the fourth cutting teeth 5 are all arranged to face forward in an inclined manner, and an angle is formed between the central axis of the fourth cutting teeth 5 and the axial direction of the drum 1 .

[0068] Optionally, the angles between the central axis of the fourth cutting tooth 5 and the axial direction of the drum 1 are the same.

[0069] The embodiment of the present invention further provides a thin coal seam coal mining machine, which includes a frame, a cutting device and a driving device, wherein the cutting device is the cutting device 100 of any of the above embodiments. The cutting device 100 is arranged on the frame, and the drum 1 of the cutting device 100 is arranged horizontally. The horizontal arrangement of the drum 1 of the cutting device 100 means that the axial direction of the drum 1 is substantially along the horizontal direction. The driving device is arranged on the frame, and the driving device is used to drive the drum 1 of the cutting device 100 to rotate.

[0070] When the thin coal seam shearer is performing a cutting operation, the driving device drives the drum 1 to rotate, and the rotation of the drum 1 drives the plurality of first cutting teeth 2 arranged on the first end 11 to rotate.

[0071] In some embodiments, there are two cutting devices 100, and the two cutting devices 100 are arranged at intervals in the forward direction of the coal mining machine. The arrangement of the two cutting devices 100 is conducive to improving the coal mining efficiency of the coal mining machine.

[0072] The embodiment of the present invention also provides a thin coal seam coal mining system, comprising: a coal mining machine and a traction system, wherein the coal mining machine is the thin coal seam coal mining machine in any of the above embodiments. The traction system is connected to the coal mining machine, and the traction system is used to traction the coal mining machine to move along the working face.

[0073] When the thin coal seam mining system is performing cutting operations, it is mainly divided into two main steps: 1. The cutting device 100 gradually moves forward (i.e., along the axial direction of the drum 1 into the coal wall), the first cutting tooth 2 contacts the coal wall, and cuts the coal wall along the thickness direction of the coal wall, i.e., enters the coal wall; 2. The thin coal seam coal mining machine moves along the working face, and the extension direction of the working face is basically parallel to the coal wall. The moving direction of the thin coal seam coal mining machine is orthogonal to the axial direction of the drum 1 of the cutting device 100, and the coal wall is peeled off.

[0074] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0075] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0076] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0077] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0078] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0079] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A cutting device, characterized in that: include: roller; and A plurality of first cutting teeth are arranged at intervals on the end face of the first end of the drum, an angle is formed between the central axis of the first cutting teeth and the axial direction of the drum, and the angle is greater than or equal to 25°, and angles of various sizes are formed between the central axis of the plurality of first cutting teeth and the axial direction of the drum.

2. The cutting device according to claim 1, characterized in that: The plurality of first cutting teeth are arranged in a spiral pattern with the central axis of the drum as the center, and the angle between the central axis of the first cutting teeth and the axial direction of the drum gradually increases from the inside to the outside.

3. The cutting device according to claim 1, characterized in that: The multiple first cutting teeth are divided into multiple groups, each group of first cutting teeth includes a plurality of first cutting teeth, and the plurality of first cutting teeth are arranged in a spiral from the inside to the outside, and the multiple groups of first cutting teeth are rotationally symmetrical with the central axis of the drum as the center line, and in the direction from the inside to the outside, the angle between the central axis of the first cutting teeth and the axial direction of the drum gradually increases.

4. The cutting device according to claim 3, characterized in that: The plurality of first cutting teeth are divided into 3-4 groups, and each group of first cutting teeth includes 4-8 first cutting teeth.

5. The cutting device according to any one of claims 1 to 4, characterized in that: The end face of the first end of the drum is a plane perpendicular to the central axis of the drum, and the tooth tips of the plurality of first cutting teeth are located on a first arc surface, which is a arc surface protruding in a direction away from the end face of the first end of the drum.

6. The cutting device according to any one of claims 1 to 4, characterized in that: The end surface of the first end of the drum is an arc surface protruding in the direction away from the second end of the drum, and the tooth tips of the plurality of first cutting teeth are located on the first arc surface, which is an arc surface protruding in the direction away from the end surface of the first end of the drum.

7. The cutting device according to any one of claims 1 to 4, characterized in that: The angle between the central axis of the first cutting tooth and the axial direction of the drum is 30°-60°.

8. The cutting device according to any one of claims 1 to 4, characterized in that: Also includes: A plurality of second cutting teeth, wherein the plurality of second cutting teeth are arranged at intervals on the outer peripheral surface of the drum; and / or, A plurality of third cutting teeth are provided at intervals around the plurality of first cutting teeth along the circumferential direction of the drum.

9. A coal mining machine, characterized in that: include: frame; A cutting device, wherein the cutting device is a cutting device according to any one of claims 1 to 8, the cutting device is arranged on the frame, and the drum of the cutting device is arranged horizontally; and A driving device is arranged on the frame, and is used for driving the cutting device to rotate.

10. A coal mining system, characterized in that: include: A coal shearer, wherein the coal shearer is the coal shearer according to claim 9; and A traction system is connected to the coal mining machine, and the traction system is used to tow the coal mining machine to move along the working face.

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