Cutting pick of coal mining machine

Abstract

The utility model provides a coal mining machine cutting pick which comprises a fixed bin, a cutting pick body is arranged in the fixed bin, the outer surface of the cutting pick body is fixedly connected with a fixed block, the inner wall of the fixed block is rotatably connected with a fixed rod, and the two ends of the fixed rod are fixedly connected with the inner wall of the fixed bin. A protective sleeve is arranged on the outer surface of the fixing bin, an angle adjusting assembly used for adjusting the angle of the cutting pick body is arranged outside the fixing bin, and a reinforcing assembly used for reinforcing the cutting pick body is arranged outside the fixing bin. Through cooperation of the angle adjusting assembly, the reinforcing assembly, the fixing block and the fixing rod, the angle of the cutting tooth body can be adjusted conveniently and quickly, so that the optimal cutting angle can be selected during coal rock crushing, the crushing efficiency is improved, the angle of the cutting tooth body can be adjusted according to the hardness and toughness differences of coal rock in different areas, and the cutting tooth is more convenient to use. And the phenomena of aggravated wear and even tooth breakage caused by overlarge impact load borne by the cutting tooth body are avoided.

Description

Technical Field

[0001] This utility model relates to the field of coal mining machinery technology, and in particular to a cutting tooth for a coal mining machine. Background Technology

[0002] In modern coal mining operations, the coal mining machine, as the core equipment, bears the important responsibility of efficiently extracting coal from the coal face. The cutting teeth, as the key components of the coal mining machine that directly contact the coal and rock, are like the "teeth" of the coal mining machine. They cut and crush the coal body through high-speed rotation or reciprocating motion, realizing the function of coal falling and crushing. They are the foundation for the smooth progress of the entire mining process.

[0003] According to CN222576663U, a cutting tooth for a coal mining machine is disclosed. It includes a cutter body, and a cutter head is installed on the upper part of the cutter body. The structure of the cutter body, from bottom to top, includes an embedded mounting part, an intermediate connecting part, and a cutter head mounting part. The intermediate connecting part is used to connect the embedded mounting part and the cutter head mounting part. The outer wall of the embedded mounting part is provided with a cutting tooth stabilizing device. The cutting tooth stabilizing device includes a lifting module and a forward extrusion extrusion module that mechanically cooperates with the lifting module.

[0004] In practical use, the above-mentioned solution cannot adjust the posture of the cutting teeth. Due to the large differences in the hardness and toughness of coal and rock in different regions, the cutting teeth with a fixed angle will be subjected to excessive impact loads when encountering coal and rock with high hardness or special structure, which will lead to increased wear and even tooth breakage. Furthermore, it is difficult to select the optimal cutting angle when crushing coal and rock, which reduces the crushing efficiency. Utility Model Content

[0005] This utility model provides a coal mining machine cutting tooth to solve the technical problems existing in the background art.

[0006] The purpose and effect of this utility model of a coal mining machine cutting tooth are achieved by the following specific technical means: a coal mining machine cutting tooth includes a fixed chamber, a cutting tooth body is provided inside the fixed chamber, a fixed block is fixedly connected to the outer surface of the cutting tooth body, a fixed rod is rotatably connected to the inner wall of the fixed block, and both ends of the fixed rod are fixedly connected to the inner wall of the fixed chamber, a protective sleeve is provided on the outer surface of the fixed chamber, and an angle adjustment component for adjusting the angle of the cutting tooth body is provided outside the fixed chamber, the angle adjustment component includes a first rotating rod rotatably connected to the outer surface of the fixed chamber;

[0007] The angle adjustment component also includes an adjustment structure for rotating the cutting tooth body to adjust the angle;

[0008] The fixed chamber is externally equipped with a reinforcement component for reinforcing the cutting tooth body.

[0009] Preferably, the adjustment structure includes a first bevel gear fixedly connected to the outer surface of the first rotating rod, a second bevel gear meshing with the outside of the first bevel gear, a second rotating rod fixedly connected to the inner wall of the second bevel gear, and both ends of the second rotating rod being rotatably connected to the inner wall of the fixed chamber.

[0010] Preferably, a meshing gear is fixedly connected to the outer surface of the second rotating rod, a toothed plate is meshed with the outer surface of the meshing gear, a movable column is fixedly connected to the outer surface of the toothed plate, a connecting chamber is slidably connected to the outer surface of the movable column, and the outer surface of the connecting chamber is fixedly connected to the outer surface of the cutting tooth body.

[0011] Preferably, a compression spring is fixedly connected to the inner wall of the connecting chamber, and the other end of the compression spring is fixedly connected to the outer surface of the moving column.

[0012] Preferably, two movable plates are fixedly connected to the outer surface of the toothed plate, and each movable plate has a guide rail slidably connected to its outer surface, and the outer surface of the guide rail is fixedly connected to the inner wall of the fixed chamber.

[0013] Preferably, the reinforcement component includes a first threaded rod threaded to the outer surface of the fixed chamber, a first rotating plate rotatably connected to the bottom end of the first threaded rod, a first hinge seat fixedly connected to the bottom surface of the first rotating plate, an arc-shaped plate hinged to the inner wall of the first hinge seat, a second hinge seat hinged to the outer surface of the arc-shaped plate, a second rotating plate fixedly connected to the outer surface of the second hinge seat, a second threaded rod rotatably connected to the upper surface of the second rotating plate, and the outer surface of the second threaded rod threadedly connected to the inner wall of the fixed chamber.

[0014] Beneficial effects:

[0015] 1. The cutting tooth of this coal mining machine can adjust the angle of the cutting tooth body through the cooperation of the angle adjustment component, the reinforcement component, the fixing block and the fixing rod. This is convenient and quick, so that the best cutting angle can be selected when crushing coal and rock, thereby improving crushing efficiency. Moreover, the angle of the cutting tooth body can be adjusted according to the differences in hardness and toughness of coal and rock in different areas, so as to avoid excessive impact load on the cutting tooth body, which may lead to accelerated wear or even tooth breakage.

[0016] 2. The cutting teeth of this coal mining machine are reinforced by a set of reinforcement components to prevent the cutting teeth from rotating when crushing coal, which would affect the crushing effect. The set of protective sleeve can deform into the fixed chamber as the angle of the cutting teeth is adjusted, which plays a protective role and prevents coal from entering the fixed chamber and affecting subsequent angle adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0018] Figure 2 This is a three-dimensional structural schematic diagram of the fixed compartment of this utility model, shown in a front sectional view.

[0019] Figure 3 This is a three-dimensional structural diagram of the reinforcement component of this utility model.

[0020] Figure 4 This is a three-dimensional structural diagram of the angle adjustment component of this utility model.

[0021] Figure 5 This is a three-dimensional structural schematic diagram of the connecting compartment of this utility model, shown in a cross-sectional view.

[0022] Figure 1-5 In the diagram, the correspondence between component names and drawing numbers is as follows:

[0023] 1. Fixed chamber; 2. Cutting tooth body; 3. Angle adjustment assembly; 301. First rotating rod; 302. First bevel gear; 303. Second bevel gear; 304. Second rotating rod; 305. Meshing gear; 306. Tooth plate; 307. Moving column; 308. Connecting chamber; 309. Compression spring; 310. Moving plate; 311. Guide rail; 4. Reinforcing assembly; 401. First threaded rod; 402. First rotating plate; 403. First hinge seat; 404. Arc plate; 405. Second hinge seat; 406. Second rotating plate; 407. Second threaded rod; 5. Fixing block; 6. Fixing rod; 7. Protective sleeve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0025] As attached Figure 1 To be continued Figure 2 As shown: A coal mining machine cutting tooth includes a fixed chamber 1, a cutting tooth body 2 is disposed inside the fixed chamber 1, a fixed block 5 is fixedly connected to the outer surface of the cutting tooth body 2, a fixed rod 6 is rotatably connected to the inner wall of the fixed block 5, and both ends of the fixed rod 6 are fixedly connected to the inner wall of the fixed chamber 1. A protective sleeve 7 is disposed on the outer surface of the fixed chamber 1. The protective sleeve 7 is made of rubber material with strong elasticity and high tear strength, which can deform into the fixed chamber 1 as the angle of the cutting tooth body 2 is adjusted, so as to play a protective role and prevent coal from entering the fixed chamber 1 and affecting subsequent angle adjustment.

[0026] As attached Figure 1 Appendix Figure 2 Appendix Figure 4 and attached Figure 5 As shown: An angle adjustment assembly 3 for adjusting the angle of the cutting tooth body 2 is provided on the outside of the fixed chamber 1. The angle adjustment assembly 3 includes a first rotating rod 301 rotatably connected to the outer surface of the fixed chamber 1. The angle adjustment assembly 3 also includes an adjustment structure for driving the cutting tooth body 2 to rotate and adjust the angle. The adjustment structure includes a first bevel gear 302 fixedly connected to the outer surface of the first rotating rod 301. A second bevel gear 303 meshes with the outside of the first bevel gear 302. A second rotating rod 304 is fixedly connected to the inner wall of the second bevel gear 303, and both ends of the second rotating rod 304 are rotatably connected to the inner wall of the fixed chamber 1. A meshing gear 305 is fixedly connected to the outer surface of the second rotating rod 304. A toothed plate 306 meshes with the outside of the meshing gear 305. A moving column 307 is fixedly connected to the outer surface of the toothed plate 306. The outer surface of 307 is slidably connected to the connecting chamber 308, and the outer surface of the connecting chamber 308 is fixedly connected to the outer surface of the cutting tooth body 2. Turning the first rotating rod 301 drives the first bevel gear 302 to rotate. The meshing between the first bevel gear 302 and the second bevel gear 303 drives the meshing gear 305 to rotate. Then, the meshing between the meshing gears 305 causes the tooth plate 306 to perform circumferential motion, thereby driving the cutting tooth body 2 to rotate around the fixed rod 6. This achieves the effect of adjusting the angle of the cutting tooth body 2, which is convenient and quick. It can select the best cutting angle when crushing coal and rock, and can adjust the angle of the cutting tooth body 2 according to the differences in the hardness and toughness of coal and rock in different areas, so as to avoid excessive impact load on the cutting tooth body 2, which may lead to accelerated wear or even tooth breakage.

[0027] As attached Figure 1 Appendix Figure 2 Appendix Figure 4 and attached Figure 5 As shown: A compression spring 309 is fixedly connected to the inner wall of the connecting chamber 308. The other end of the compression spring 309 is fixedly connected to the outer surface of the moving column 307. Two moving plates 310 are fixedly connected to the outer surface of the toothed plate 306. Each moving plate 310 has a guide rail 311 slidably connected to its outer surface, and the outer surface of the guide rail 311 is fixedly connected to the inner wall of the fixed chamber 1. The compression spring 309 is always in a compressed state. When the toothed plate 306 moves, the compressed spring 309 will pop outward to push the moving column 307 to move, so that the toothed plate 306 and the meshing gear 305 are always in a meshing state. This prevents the toothed plate 306 from disengaging from the meshing gear 305 when the cutting tooth body 2 is subjected to force during coal mining, which would cause the angle of the cutting tooth body 2 to change and affect the mining effect. The guide rail 311 can guide the toothed plate 306, so that the toothed plate 306 can move stably and facilitate the subsequent adjustment of the angle of the cutting tooth body 2.

[0028] As attached Figure 1 To be continued Figure 3 As shown: A reinforcement assembly 4 for reinforcing the cutting tooth body 2 is provided on the outside of the fixed chamber 1. The reinforcement assembly 4 includes a first threaded rod 401 threaded to the outer surface of the fixed chamber 1. A first rotating plate 402 is rotatably connected to the bottom end of the first threaded rod 401. A first hinge seat 403 is fixedly connected to the bottom surface of the first rotating plate 402. An arc-shaped plate 404 is hinged to the inner wall of the first hinge seat 403. A second hinge seat 405 is hinged to the outer surface of the arc-shaped plate 404. A second rotating plate 406 is fixedly connected to the outer surface of the second hinge seat 405. A second threaded rod 407 is rotatably connected to the upper surface of the second rotating plate 406, and the outer surface of the second threaded rod 407 is threaded to the inner wall of the fixed chamber 1. Next, before adjusting the angle of the cutting tooth body 2, rotate the first threaded rod 401 and the second threaded rod 407 to move the arc plate 404 upward, so that the arc plate 404 is disengaged from the cutting tooth body 2, which facilitates the subsequent adjustment of the angle of the cutting tooth body 2. After the angle of the cutting tooth body 2 is adjusted, first turn the first threaded rod 401 to push one end of the arc plate 404 into contact with the outer surface of the cutting tooth body 2, and then turn the second threaded rod 407 to push the other end of the arc plate 404 into contact with the outer surface of the cutting tooth body 2, so that the arc plate 404 fits tightly against the outer surface of the cutting tooth body 2, which reinforces the cutting tooth body 2 and prevents the cutting tooth body 2 from rotating when digging coal.

[0029] Working principle: When adjusting the angle of the cutting tooth body 2, firstly, rotating the first threaded rod 401 and the second threaded rod 407 moves the arc plate 404 upward, disengaging it from the cutting tooth body 2. Then, turning the first rotating rod 301 drives the first bevel gear 302 to rotate. The meshing between the first bevel gear 302 and the second bevel gear 303 drives the meshing gear 305 to rotate. The meshing between the meshing gears 305 and 306 causes the tooth plate 306 to rotate in a circular motion, thus rotating the cutting tooth body 2 around the fixed rod 6. After the angle of the cutting tooth body 2 is adjusted, turning the first threaded rod 401... The first threaded rod 401 pushes one end of the arc-shaped plate 404 to contact the outer surface of the cutting tooth body 2. Then, the second threaded rod 407 is turned to push the other end of the arc-shaped plate 404 to contact the outer surface of the cutting tooth body 2, so that the arc-shaped plate 404 fits tightly against the outer surface of the cutting tooth body 2, which strengthens the cutting tooth body 2. This achieves the effect of adjusting the angle of the cutting tooth body 2, which is convenient and quick. It can select the best cutting angle when crushing coal and rock, and can adjust the angle of the cutting tooth body 2 according to the differences in hardness and toughness of coal and rock in different areas, so as to avoid excessive impact load on the cutting tooth body 2, which may lead to accelerated wear or even tooth breakage.

Claims

1. A coal mining machine cutting tooth, comprising a fixed chamber (1), characterized in that: The fixed chamber (1) is provided with a cutting tooth body (2) inside. A fixing block (5) is fixedly connected to the outer surface of the cutting tooth body (2). A fixing rod (6) is rotatably connected to the inner wall of the fixing block (5). Both ends of the fixing rod (6) are fixedly connected to the inner wall of the fixed chamber (1). A protective sleeve (7) is provided on the outer surface of the fixed chamber (1). An angle adjustment component (3) for adjusting the angle of the cutting tooth body (2) is provided on the outside of the fixed chamber (1). The angle adjustment component (3) includes a first rotating rod (301) rotatably connected to the outer surface of the fixed chamber (1). The angle adjustment component (3) also includes an adjustment structure for driving the cutting tooth body (2) to rotate for angle adjustment; The fixed chamber (1) is provided with a reinforcement component (4) for reinforcing the cutting tooth body (2).

2. The coal mining machine cutting tooth according to claim 1, characterized in that: The adjustment structure includes a first bevel gear (302) fixedly connected to the outer surface of the first rotating rod (301), a second bevel gear (303) meshing with the outside of the first bevel gear (302), a second rotating rod (304) fixedly connected to the inner wall of the second bevel gear (303), and both ends of the second rotating rod (304) being rotatably connected to the inner wall of the fixed chamber (1).

3. The coal mining machine cutting tooth according to claim 2, characterized in that: The outer surface of the second rotating rod (304) is fixedly connected to a meshing gear (305), the meshing gear (305) is meshed with a toothed plate (306), the outer surface of the toothed plate (306) is fixedly connected to a moving column (307), the outer surface of the moving column (307) is slidably connected to a connecting chamber (308), and the outer surface of the connecting chamber (308) is fixedly connected to the outer surface of the cutting tooth body (2).

4. The coal mining machine cutting tooth according to claim 3, characterized in that: A compression spring (309) is fixedly connected to the inner wall of the connecting chamber (308), and the other end of the compression spring (309) is fixedly connected to the outer surface of the moving column (307).

5. The coal mining machine cutting tooth according to claim 3, characterized in that: Two movable plates (310) are fixedly connected to the outer surface of the toothed plate (306). Each movable plate (310) is slidably connected to a guide rail (311) on its outer surface, and the outer surface of the guide rail (311) is fixedly connected to the inner wall of the fixed chamber (1).

6. The coal mining machine cutting tooth according to claim 1, characterized in that: The reinforcement component (4) includes a first threaded rod (401) threaded to the outer surface of the fixed chamber (1), a first rotating plate (402) rotatably connected to the bottom end of the first threaded rod (401), a first hinge seat (403) fixedly connected to the bottom surface of the first rotating plate (402), an arc plate (404) hinged to the inner wall of the first hinge seat (403), a second hinge seat (405) hinged to the outer surface of the arc plate (404), a second rotating plate (406) fixedly connected to the outer surface of the second hinge seat (405), a second threaded rod (407) rotatably connected to the upper surface of the second rotating plate (406), and the outer surface of the second threaded rod (407) threadedly connected to the inner wall of the fixed chamber (1).

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