Coal cutting pick for coal mining

Abstract

The utility model discloses a coal cutting pick for coal mining in the technical field of coal mining, which comprises a base of the coal cutting pick and a digging tooth sleeved on the outer side of the base, one end of the base is provided with a fixing groove, one end of the digging tooth is provided with a placing groove, the inner side of the placing groove is connected with a fixing block, and the fixing block is connected with the digging tooth. Locking pieces are installed between the digging teeth and the base, a fixing part is connected to the outer side, close to one end, of the base, one end of the base is inserted into a containing groove in one side of the digging teeth, meanwhile, a fixing block on the inner side of the containing groove is inserted into a fixing groove in one side of the base, and a gasket can be located between the fixing block and the fixing groove. By means of the technical scheme, the spacer can conduct anti-collision and anti-abrasion protection on the fixing block, the base and the digging teeth are spliced and installed again through the locking piece, and the problems that the stability of splicing installation of the cutting tooth head and the cutting tooth base is low, consequently, the cutting tooth head and the cutting tooth base shake or disengage, and disassembly and replacement operation of the cutting tooth head and the cutting tooth base are strenuous are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a coal cutting pick for coal mining. Background Technique

[0002] Shearer and roadheader are important production equipment in coal mines. As an important component of shearer and roadheader, the cutting pick is an important wear element during operation; the cutting pick is a tool for cutting coal or rock in mining machinery, generally including a cutting pick head and a cutting pick seat, etc.; the cutting pick head directly cuts coal or rock, requiring high hardness, and mostly uses a cemented carbide head; the material of the cemented carbide head mostly uses tungsten cobalt alloy; the cutting pick seat is a connecting component between the cutting pick head and coal mining equipment, roadheader and rotary drilling equipment, etc., requiring strong impact toughness. The stability of the existing splicing and installation of the cutting pick head and the cutting pick seat is low, and the cutting pick seat and the cutting pick head are prone to detachment.

[0003] During the coal mining process, the cutting pick head is subjected to impact or wear. The low stability of the splicing and installation of the cutting pick head and the cutting pick seat results in the shaking or detachment of the cutting pick head and the cutting pick seat, and the disassembly and replacement operation of the cutting pick head and the cutting pick seat is relatively laborious. Therefore, those skilled in the art provide a coal cutting pick for coal mining to solve the problems raised in the above background technique. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a coal cutting pick for coal mining to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A coal cutting pick for coal mining includes the base of the coal cutting pick and the excavation tooth sleeved outside the base. One end of the base is provided with a fixing groove, one end of the excavation tooth is provided with a placing groove, a fixing block is connected inside the placing groove, a locking member is installed between the excavation tooth and the base, a fixing part is connected to the outside of the base and close to one end, the base is movably connected with the placing groove, and the fixing block is movably connected with the fixing groove;

[0006] The locking member includes a fixing ring sleeved outside the base and located on the other side of the fixing part. Activity grooves are respectively opened on the outer periphery of the base. One side of the inside of the activity groove is connected with an elastic frame. One side of the elastic frame is connected with a sliding plate. One side of the sliding plate is connected with a pushing block. The other side of the sliding plate is connected with a locking block. A plurality of locking grooves arranged in a circumferential manner are opened on the outer side of the excavation tooth. Both sides of the sliding plate are fixedly connected with the elastic frame and the pushing block respectively. The fixing ring is screwed with the base.

[0007] Preferably: A plurality of positioning blocks arranged in a circumferential manner are connected to the other side of the excavation tooth. A plurality of positioning grooves arranged in a circumferential manner are opened on the other side of the fixing part. The positioning blocks are movably connected with the positioning grooves.

[0008] Preferably, first elastic pieces are respectively connected to both sides inside the elastic frame, two second elastic pieces are connected between the two first elastic pieces, the first elastic pieces are fixedly connected to the elastic frame, and the first elastic pieces are fixedly connected to the second elastic pieces.

[0009] Preferably, a limiting rod is connected to the inner side of the movable groove and near the bottom, and the limiting rod penetrates through the sliding plate and is slidably connected thereto.

[0010] Preferably, a progressive portion is provided at one end of the pushing block and near the top, a pushing portion is provided at the bottom of the fixed ring and near the inner ring, and the cross sections of the pushing portion and the progressive portion are both arc-shaped.

[0011] Preferably, a gasket is placed inside the fixing groove.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. In the present utility model, by providing a digging tooth, a fixing groove, a placing groove and a fixing block, the digging tooth is spliced and installed with the base. One end of the base is inserted into the placing groove on one side of the digging tooth, and at the same time, the fixing block inside the placing groove is inserted into the fixing groove on one side of the base. The locking member is used to splice and install the base and the digging tooth again, and then the base is spliced and installed with a coal mining machine or a tunneling machine, which improves the convenience of disassembling and installing the digging tooth for replacement and the stability of installing the digging tooth.

[0014] 2. In the present utility model, by providing a fixed ring, an elastic frame, a sliding plate, a pushing block and a locking block, the fixed ring is sleeved outside the base and screwed and rotated. The fixed ring moves downward to squeeze and push the pushing block, and then the pushing block drives the locking block to be embedded into the locking groove outside the fixing block through the sliding plate, so that a plurality of locking blocks lock and fix the fixing block, which improves the convenience and stability of installing the digging tooth.

[0015] 3. In the present utility model, by providing a positioning block and a positioning groove, a plurality of positioning blocks arranged circumferentially at the bottom of the digging tooth can be embedded into the positioning groove on one side of the fixing part, which can increase the contact area of the splicing between the digging tooth and the base and improve the stability of the splicing and installation of the digging tooth and the base. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 is a left-sectional perspective view of the overall structure of the present utility model;

[0018] Figure 3 is the Figure 2 enlarged view at A in the overall structure of the present utility model;

[0019] Figure 4 This is a schematic structural diagram of the base, excavation teeth, fixing grooves, placement grooves, fixing blocks, fixing parts, fixing rings, movable groove positioning blocks, and positioning grooves in the overall structure of the present utility model.

[0020] In the figure: 1. Base; 2. Excavation teeth; 3. Fixing groove; 4. Placement groove; 5. Fixing block; 6. Fixing part; 7. Fixing ring; 8. Movable groove; 9. Elastic frame; 10. Sliding plate; 11. Pushing block; 12. Locking block; 13. Locking groove; 14. Positioning block; 15. Positioning groove; 16. First elastic piece; 17. Second elastic piece; 18. Limiting rod; 19. Progressive part; 20. Pushing part; 21. Gasket. Specific embodiments

[0021] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0022] Please refer to Figures 1 to 4 , in the embodiment of the present utility model, a coal cutting pick for coal mining includes a base 1 of the coal cutting pick and excavation teeth 2 sleeved on the outer side of the base 1. A fixing groove 3 is opened at one end of the base 1, a placement groove 4 is opened at one end of the excavation teeth 2, a fixing block 5 is connected inside the placement groove 4, a locking member is installed between the excavation teeth 2 and the base 1, a fixing part 6 is connected to the outer side of the base 1 and close to one end, a gasket 21 is placed inside the fixing groove 3, the base 1 is movably connected to the placement groove 4, and the fixing block 5 is movably connected to the fixing groove 3.

[0023] During use, the excavation teeth 2 and the base 1 are spliced and installed. One end of the base 1 is inserted into the placement groove 4 on one side of the excavation teeth 2. At the same time, the fixing block 5 inside the placement groove 4 is inserted into the fixing groove 3 on one side of the base 1. The gasket 21 can be located between the fixing block 5 and the fixing groove 3, which can protect the fixing block 5 from impact, collision, and abrasion. The locking member is used to splice and install the base 1 and the excavation teeth 2 again, and then the base 1 is spliced and installed with a shearer or a roadheader to improve the convenience of disassembling and replacing the excavation teeth 2 and the stability of installing the excavation teeth 2.

[0024] In one embodiment, specifically, the locking member includes a fixing ring 7 sleeved on the outer side of the base 1 and located on the other side of the fixing portion 6. Activity grooves 8 are respectively formed around the outer side of the base 1. One side inside the activity groove 8 is connected with an elastic frame 9. One side of the elastic frame 9 is connected with a sliding plate 10. One side of the sliding plate 10 is connected with a pushing block 11. The other side of the sliding plate 10 is connected with a locking block 12. A plurality of locking grooves 13 arranged in a circumferential pattern are formed on the outer side of the digging tooth 2. Both sides inside the elastic frame 9 are respectively connected with a first elastic sheet 16. Two second elastic sheets 17 are connected between the two first elastic sheets 16. A limiting rod 18 is connected to the inner side of the activity groove 8 and near the bottom. One end of the pushing block 11 and near the top is provided with a progressive portion 19. The bottom of the fixing ring 7 and near the inner ring is provided with a pushing portion 20. The cross-sections of the pushing portion 20 and the progressive portion 19 are both arc-shaped. The limiting rod 18 penetrates through the sliding plate 10 and is slidably connected therewith. The first elastic sheet 16 is fixedly connected with the elastic frame 9. The first elastic sheet 16 is fixedly connected with the second elastic sheet 17. Both sides of the sliding plate 10 are respectively fixedly connected with the elastic frame 9 and the pushing block 11. The fixing ring 7 is screwed to the base 1.

[0025] Among them, the limiting rod 18 can guide and limit the sliding plate 10 to prevent the sliding plate 10 from shifting or shaking. The fixing ring 7 is sleeved on the outer side of the base 1 and is screwed and rotated. When the fixing ring 7 moves downward, it squeezes and pushes the pushing block 11. Then the pushing block 11 drives the locking block 12 through the sliding plate 10 to be embedded into the locking groove 13 on the outer side of the fixing block 5, so that a plurality of locking blocks 12 lock and fix the fixing block 5. When the pushing portion 20 at the bottom of the fixing ring 7 moves downward, it contacts and presses the progressive portion 19 at the top of the pushing block 11 to avoid contact and friction between the fixing ring 7 and the pushing block 11. The first elastic sheet 16 and the second elastic sheet 17 can squeeze and push the elastic frame 9 to make the elastic frame 9 squeeze the sliding plate 10 to slide in the activity groove 8, so that the sliding plate 10 drives the locking block 12 to disengage from the locking groove 13, improving the convenience and stability of installing the digging tooth 2.

[0026] Further, a plurality of positioning blocks 14 arranged in a circumferential pattern are connected to the other side of the digging tooth 2. A plurality of positioning grooves 15 arranged in a circumferential pattern are formed on the other side of the fixing portion 6. The positioning blocks 14 are movably connected with the positioning grooves 15.

[0027] In one embodiment, specifically, a plurality of positioning blocks 14 arranged in a circumferential pattern at the bottom of the digging tooth 2 can be embedded into the positioning grooves 15 on one side of the fixing portion 6, which can increase the contact area between the digging tooth 2 and the base 1 and improve the stability of the splicing and installation of the digging tooth 2 and the base 1.

[0028] The working principle of the present utility model:

[0029] First, the excavation tooth 2 is spliced and installed with the base 1. At this time, one end of the base 1 is inserted into the placement groove 4 on one side of the excavation tooth 2. At the same time, the fixing block 5 inside the placement groove 4 is inserted into the fixing groove 3 on one side of the base 1. Meanwhile, the gasket 21 is located between the fixing block 5 and the fixing groove 3. Then, the fixing ring 7 is sleeved on the outside of the base 1 and rotated by screwing. At this time, the fixing ring 7 moves downward to squeeze and push the pushing block 11. At the same time, when the pushing part 20 at the bottom of the fixing ring 7 moves downward, it contacts and presses down the progressive part 19 at the top of the pushing block 11. At this time, the pushing block 11 squeezes and pushes the elastic frame 9 through the sliding plate 10. At the same time, the elastic frame 9 squeezes the first elastic piece 16 and the second elastic piece 17. Then, the pushing block 11 drives the locking block 12 to be embedded into the locking groove 13 on the outside of the fixing block 5 through the sliding plate 10. Then, multiple locking blocks 12 lock and fix the fixing block 5. At the same time, the positioning block 14 is embedded into the positioning groove 15.

[0030] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and the inventive concept of the present invention, makes equivalent substitutions or changes, and all should be covered within the protection scope of the present invention.

Claims

1. A coal pick for coal mining, comprising a base (1) of the coal pick and a digging tooth (2) sleeved on the outside of the base (1), characterized in that: A fixing groove (3) is formed at one end of the base (1), a placement groove (4) is formed at one end of the digging tooth (2), a fixing block (5) is connected to the inner side of the placement groove (4), a locking piece is installed between the digging tooth (2) and the base (1), a fixing part (6) is connected to the outer side of the base (1) near one end, the base (1) is movably connected to the placement groove (4), and the fixing block (5) is movably connected to the fixing groove (3); The locking member comprises a fixing ring (7) which is sleeved on the outside of the base (1) and is located on the other side of the fixing part (6); movable grooves (8) are respectively provided on the four sides of the outside of the base (1); one side of the inside of the movable groove (8) is connected to an elastic frame (9); one side of the elastic frame (9) is connected to a sliding plate (10); one side of the sliding plate (10) is connected to a pushing block (11); the other side of the sliding plate (10) is connected to a locking block (12); a plurality of locking grooves (13) arranged in a circumference are provided on the outside of the excavating tooth (2); the two sides of the sliding plate (10) are respectively fixedly connected to the elastic frame (9) and the pushing block (11); and the fixing ring (7) is screwed to the base (1).

2. A coal pick for coal mining according to claim 1, characterized in that: The other side of the digging tooth (2) is connected to a plurality of circumferentially arranged positioning blocks (14), the other side of the fixing portion (6) is provided with a plurality of circumferentially arranged positioning grooves (15), and the positioning blocks (14) are movably connected to the positioning grooves (15).

3. A coal pick for coal mining according to claim 2, characterized in that: First spring sheets (16) are connected to both sides of the elastic frame (9), two second spring sheets (17) are connected between the two first spring sheets (16), the first spring sheet (16) is fixedly connected to the elastic frame (9), and the first spring sheet (16) is fixedly connected to the second spring sheet (17).

4. A coal pick for coal mining according to claim 3, characterized in that: A limiting rod (18) is connected to the inner side of the movable groove (8) and close to the bottom. The limiting rod (18) penetrates the sliding plate (10) and is slidably connected thereto.

5. A coal pick for coal mining according to claim 4, characterized in that: A progressive portion (19) is provided at one end of the pushing block (11) and close to the top, and a pushing portion (20) is provided at the bottom of the fixing ring (7) and close to the inner ring. The pushing portion (20) and the progressive portion (19) both have arc-shaped cross sections.

6. A coal pick for coal mining according to claim 2, characterized in that: A gasket (21) is placed inside the fixing groove (3).

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