Disc hob type cutting structure of coal mining machine

Abstract

The utility model discloses a disc-shaped hob type cutting structure of a coal mining machine, which comprises a barrel body, a spiral blade, a cutterhead and a disc-shaped cutter head structure, and the spiral blade is spirally arranged on the outer wall of the barrel body; the cutter head is arranged at the end part of the cylinder body; a plurality of disc-shaped tool bit structures are arranged on the outer wall of the spiral blade at intervals, and a plurality of disc-shaped tool bit structures are obliquely arranged on the outer ring of the cutter head at intervals; the disc-shaped cutter head structure comprises a mounting frame, a cutter shaft and a hobbing cutter, and the mounting frame is a U-shaped frame; the cutter shaft is arranged on the mounting frame; and the hobbing cutter is rotatably arranged on the cutter shaft. The disc-shaped cutter head structures are arranged on the spiral blade and the cutter head, the hob can rotate along the cutter shaft to counteract impact force of rock cutting, and the situation that the hob is broken due to the fact that the rock cannot be cut is avoided; and when the hobbing cutter cuts the rock wall, the surface is approximately broken by a line, the abrasion loss of the rock wall to the hobbing cutter is less, the abrasion resistance is relatively improved, and the service life is longer under extreme geological conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining and drilling, in particular to a disc-type hob-type cutting structure of a coal mining machine. Background Art

[0002] As the mining depth of underground mines increases, the geological conditions of the working face become more complex, and the rock hardness and content are high, which puts higher requirements on the cutting system of the coal mining machine.

[0003] The cutting systems commonly used in traditional coal mining machines are mainly divided into two types: knife-type tooth cutting system and pick-type tooth cutting system.

[0004] Both systems have significant shortcomings when facing complex geological conditions: the knife-tooth cutting system consists of fixed knife-tooth and tooth holder. The knife-tooth is installed on the tooth holder and cannot rotate. This design makes it easy for the knife-tooth to break frequently when encountering hard gangue, semi-coal rock, faults and other geological conditions because it cannot unload the force through rotation, affecting work efficiency and equipment safety.

[0005] The pick-type picks in the pick-type cutting system can rotate freely, which makes it perform better in dealing with the above-mentioned complex geological conditions. However, the pick-type picks break rock based on the principle of point breaking. Although the rock breaking ability is strong, it also leads to a higher pick loss rate. For example, under extreme geological conditions with rock hardness F ≥ 8 and rock content ≥ 30%, the pick-type picks wear faster and the consumption increases sharply.

[0006] In summary, the existing knife-type tooth and pick-type tooth cutting systems face technical challenges of varying degrees when dealing with underground mining working faces with high rock hardness and high rock content. In order to improve the cutting ability and wear resistance of coal mining machines under harsh geological conditions, and at the same time improve the block formation rate to increase economic benefits, an innovative coal mining machine disc-type hob cutting structure is urgently needed to overcome the limitations of existing technology. Summary of the Invention

[0007] The present invention aims to solve at least one of the technical problems in the above-mentioned technology to a certain extent.

[0008] To achieve the above-mentioned purpose, the first aspect of the present invention proposes a disc-type roller cutter structure for a coal mining machine, comprising: a cylinder, a spiral blade, a cutter disc and a disc-shaped cutter head structure, wherein the spiral blade is spirally arranged on the outer wall of the cylinder; the cutter disc is arranged at the end of the cylinder; a plurality of disc-shaped cutter head structures are arranged at intervals on the outer wall of the spiral blade, and a plurality of disc-shaped cutter head structures are inclinedly arranged at intervals on the outer ring of the cutter disc; the disc-shaped cutter head structure comprises a mounting frame, a cutter shaft and a roller cutter, wherein the mounting frame is a U-shaped frame; the cutter shaft is arranged on the mounting frame; and the roller cutter is rotatably arranged on the cutter shaft.

[0009] In addition, the above-mentioned disc cutter structure of the coal mining machine proposed in the present invention may also have the following additional technical features:

[0010] As a further description of the above technical solution: the disc-shaped cutter head structure installed on the outer ring of the cutter disc has the cutter facing the side away from the cylinder and tilted outward.

[0011] As a further description of the above technical solution: the number of the disc-shaped cutter head structures installed on the outer ring of the cutter disc ranges from 16 to 22, and the spaced disc-shaped cutter head structures are arranged at equal distances on the cutter disc.

[0012] As a further description of the above technical solution: the disc-shaped cutter head structure is installed outside the spiral blade, and the hob is perpendicular to the axial direction of the cylinder.

[0013] As a further description of the above technical solution: the number of the disc-shaped cutter head structures installed on the outer ring of the spiral blade ranges from 8 to 12.

[0014] As a further description of the above technical solution: the surface of the hob is coated with a wear-resistant coating.

[0015] As a further description of the above technical solution: the axial angle between the hob and the cylinder is 20-70 degrees, and the angles of the multiple hobs change in a broken line reciprocating manner.

[0016] According to the disc-type roller cutter cutting structure of the coal mining machine of the utility model, a disc-shaped cutter head structure is provided on the spiral blades and the cutter disc, so that the roller can rotate along the cutter shaft to offset the impact force of cutting the rock, and the situation of the roller being broken due to the rock not being able to be cut will not occur; and when the roller cuts the rock wall, it breaks the surface approximately in a linear manner, so the amount of wear caused to the roller by the rock wall is less, the wear resistance is relatively increased, and the service life is longer under extreme geological conditions.

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0019] Figure 1 This is a structural schematic diagram of a disc-type roller cutter structure for a coal mining machine according to one embodiment of the present utility model;

[0020] Figure 2 This is a schematic diagram of the main structure of a disc-type roller cutter structure for a coal mining machine according to one embodiment of the present utility model;

[0021] Figure 3 This is a schematic diagram of a disc-shaped cutter head structure according to one embodiment of the present invention;

[0022] Figure 4 This is a schematic diagram of the change of the cutter head angle according to one embodiment of the present utility model;

[0023] As shown in the figure:

[0024] 100, cylinder; 200, spiral blade; 300, cutter disc; 400, disc-shaped cutter head structure; 410, mounting frame; 420, cutter shaft; 430, hob. DETAILED DESCRIPTION

[0025] The following describes in detail embodiments of the present invention, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0026] The following describes the disc-type roller cutter structure of a coal mining machine according to an embodiment of the present invention in conjunction with the accompanying drawings.

[0027] like Figure 1 and Figure 2 As shown, the disc-type roller cutter structure of the coal mining machine according to the embodiment of the present invention may include a cylinder 100 , spiral blades 200 , a cutter head 300 and a disc-shaped cutter head structure 400 .

[0028] Among them, the spiral blade 200 is spirally arranged on the outer wall of the cylinder 100, the cutter disc 300 is arranged at the end of the cylinder 100, and multiple disc-shaped cutter head structures 400 are arranged at intervals on the outer wall of the spiral blade 200. The outer ring of the cutter disc 300 is inclined to have multiple disc-shaped cutter head structures 400 spaced apart.

[0029] like Figure 3 As shown, the disc-shaped cutter head structure 400 includes a mounting frame 410 , a cutter shaft 420 and a cutter wheel 430 .

[0030] The mounting frame 410 is a U-shaped frame, which is mounted on the spiral blade 200 or the cutter head 300 . The cutter shaft 420 is disposed on the mounting frame 410 , and the hob 430 is rotatably disposed on the cutter shaft 420 .

[0031] It should be noted that in order to adapt to different geological conditions and improve cutting efficiency, the disc-shaped cutter head structure 400 can be distributed on the spiral blade 200 and the cutter head 300 according to a specific arrangement pattern. For example, the multiple disc-shaped cutter head structures 400 on the spiral blade 200 can be arranged at intervals, while the outer ring of the cutter head 300 is inclined to be provided with multiple disc-shaped cutter head structures 400 at intervals to achieve the best cutting effect.

[0032] The cutter 430 can rotate along the cutter shaft 420 to offset the impact force of cutting the rock, and the cutter 430 has excellent self-rotation performance. The cutter 430 will not be broken due to the inability to cut the rock, nor will it stop rotating due to sintering of rock dust. The large size of the cutter 430 will not cause a sharp increase in the cutting resistance of the mining equipment, thereby reducing the damage to the mining equipment caused by cutting hard rock. At the same time, because the cutter 430 is a disc-shaped structure, except for the part directly cut by the cutter 430 and ground into powder, most of the rest will be peeled off in blocks, and the economic benefits of working faces with requirements for block formation will be greatly increased. The cutter 430 cuts the rock wall approximately in a line-breaking manner, and the rock wall causes less wear on the cutter 430, which is relatively more wear-resistant and has a much longer service life than ordinary rollers.

[0033] Specifically, in actual operation, the shearer's disc-type cutter mechanism rotates the cylinder 100 through a motor, driving the spiral blades 200 and cutterhead 300. When the cutter 430 contacts the rock wall, it rotates against the rock wall, effectively breaking the rock. Simultaneously, the spiral blades 200 transport the cut material backward for subsequent processing. This design not only improves cutting efficiency but also enhances the overall stability and safety of the equipment, reduces maintenance costs, and extends its lifespan.

[0034] In this way, the utility model effectively responds to complex geological conditions, significantly improves the working performance of the coal mining machine, and provides a more advanced and reliable solution for underground mining.

[0035] In one embodiment of the present invention, the disc-shaped cutter head structure 400 installed on the outer ring of the cutter head 300 has its cutter 430 facing the side away from the cylinder 100 and tilted outward.

[0036] In addition, the number of disc-shaped cutter head structures 400 installed on the outer ring of the cutter head 300 ranges from 16 to 22, and the spaced disc-shaped cutter head structures 400 are arranged on the cutter head 300 at equal distances.

[0037] like Figure 4 As shown, the axial included angle between the roller cutter 430 and the cylinder 100 is 20-70 degrees, and the included angles of the multiple roller cutters 430 change in a reciprocating manner.

[0038] It should be noted that the selection of this angle range is based on actual working conditions to ensure that the hob 430 can provide sufficient cutting force when cutting into the material while reducing unnecessary vibration and impact.

[0039] If the angle of the roller cutter 430 is too small (eg, less than 20 degrees), sufficient cutting force may not be provided when encountering hard rock, resulting in poor cutting effect and even the roller cutter 430 may slip.

[0040] If the angle of the hob 430 is too large (for example, exceeding 70 degrees), it will generate greater reaction force during operation, causing increased machine vibration and potentially causing accelerated wear or damage to mechanical components. Furthermore, the strong impact will pose a safety hazard to the operator. By controlling the angle between 20 and 70 degrees, sufficient cutting force can be ensured while effectively limiting the adverse effects caused by excessive angles, maintaining system stability and safety.

[0041] The included angles of the multiple hobs 430 change in a broken line reciprocating manner. This change can make the multiple hobs 430 form a sawtooth wave or a triangular wave. The hobs 430 can contact the material at the optimal angle when cutting into the material, and reduce the angle when exiting the material, thereby reducing the impact force on the machine itself and helping to dissipate heat and remove chips.

[0042] For example, during coal mining operations, the strata encountered gradually transition from soft soil to harder rock. If the angle of the roller cutter 430 remains unchanged, it may not be possible to achieve the best cutting effect for the two materials of different properties. However, if the angle of the roller cutter 430 can be automatically adjusted in a broken line reciprocating manner during each rotation, then a smaller angle can be used for cutting when facing soft soil, and the angle can be quickly increased when encountering hard rock, ensuring that each cut can achieve the ideal effect. Such a layout design can also help the roller cutter 430 penetrate the material surface faster, forming a smoother incision, reducing the subsequent finishing workload, thereby optimizing cutting performance, reducing wear and improving work efficiency.

[0043] In order to further improve the strength of the hob 430 , the surface of the hob 430 is coated with a wear-resistant coating.

[0044] In one embodiment of the present invention, the disc-shaped cutter head structure 400 is installed outside the spiral blade 200 , and the roller cutter 430 is perpendicular to the axial direction of the cylinder 100 .

[0045] It should be noted that the disc cutter head can directly act on a working surface, such as soil, rock, or other materials, to cut or crush them. The cutter 430 (as part of the disc cutter head) is positioned perpendicular to the axial direction of the cylinder 100. That is, the rotational plane of the cutter 430 forms a 90-degree angle with the longitudinal axis of the cylinder 100. This arrangement ensures that the cutter 430 can penetrate the material at an optimal angle during its rotation, achieving efficient performance and helping to reduce vibration and impact forces generated during operation.

[0046] As a possible scenario, the number of the disc-shaped cutter head structures 400 installed on the outer ring of the spiral blade 200 ranges from 8 to 12.

[0047] It's important to note that an appropriate number of disc cutter heads ensures even load distribution during operation, preventing excessive wear or damage to individual cutter heads due to excessive pressure. Different numbers of disc cutter heads are suitable for different construction environments and material types. For example, in softer formations, a smaller number of cutter heads may be sufficient; whereas in harder or more complex formations, a larger number of cutter heads may be required to ensure efficient operation. While increasing the number of cutter heads can improve efficiency, it also increases manufacturing and maintenance costs. Therefore, selecting a reasonable number range is crucial for optimizing overall economic benefits.

[0048] In actual use, by rationally configuring the position and number of the disc cutter head structure 400 and its roller cutter 430, the working efficiency of the mechanical equipment can be significantly improved. Each disc cutter head can operate independently while cooperating with each other to ensure consistent cutting force on the entire working surface, thereby accelerating the progress of the project.

[0049] In summary, according to the disc-type roller cutter cutting structure of the coal mining machine in the embodiment of the present invention, by arranging the disc-shaped cutter head structure 400 on the spiral blade 200 and the cutter disc 300, the roller cutter 430 can rotate along the cutter shaft 420 to offset the impact force of cutting the rock, and there will be no situation where the roller cutter 430 is broken due to the inability to cut the rock; and when the roller cutter 430 cuts the rock wall, it breaks the surface approximately in a linear manner, and the amount of wear caused by the rock wall on the roller cutter 430 is less, the wear resistance is relatively increased, and the service life under extreme geological conditions is longer.

[0050] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0051] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means 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 application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A disc cutter type cutting structure for a coal mining machine, characterized in that: include: A cylinder (100), a spiral blade (200), a cutter disc (300) and a disc-shaped cutter head structure (400), wherein: The spiral blade (200) is spirally arranged on the outer wall of the cylinder (100); The cutter disc (300) is arranged at the end of the cylinder (100); A plurality of the disc-shaped cutter head structures (400) are arranged at intervals on the outer wall of the spiral blade (200), and a plurality of the disc-shaped cutter head structures (400) are arranged at intervals on the outer ring of the cutter disc (300); The disc-shaped cutter head structure (400) includes a mounting frame (410), a cutter shaft (420) and a hob (430), wherein: The mounting frame (410) is a U-shaped frame; The knife shaft (420) is arranged on the mounting frame (410); The rolling cutter (430) is rotatably arranged on the cutter shaft (420).

2. The disc cutter type cutting structure of the coal mining machine according to claim 1, characterized in that: The disc-shaped cutter head structure (400) is installed on the outer ring of the cutter disc (300), and its roller cutter (430) faces the side away from the cylinder (100) and is inclined outward.

3. The disc cutter type cutting structure of the coal mining machine according to claim 1, characterized in that: The number of the disc-shaped cutter head structures (400) installed on the outer ring of the cutter head (300) ranges from 16 to 22, and the spaced disc-shaped cutter head structures (400) are arranged at equal distances on the cutter head (300).

4. The shearer disc cutter structure according to claim 1, characterized in that: The disc-shaped cutter head structure (400) is installed outside the spiral blade (200), and the roller cutter (430) is perpendicular to the axial direction of the cylinder (100).

5. The shearer disc cutter structure according to claim 1, characterized in that: The number of the disc-shaped cutter head structures (400) installed on the outer ring of the spiral blade (200) ranges from 8 to 12.

6. The shearer disc cutter structure according to claim 1, characterized in that: The surface of the hob (430) is coated with a wear-resistant coating.

7. The disc cutter type cutting structure of the coal mining machine according to claim 1, characterized in that: The axial included angle between the roller cutter (430) and the cylinder (100) is 20-70 degrees, and the included angles of the plurality of roller cutters (430) change in a broken line reciprocating manner.

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