Split type pickaxe-shaped cutting pick for coal mining machine

Abstract

The utility model relates to the technical field of coal mining in coal mines, and discloses a split-type pickaxe-shaped cutting pick for a coal mining machine in coal mines, which comprises a cutter bar, a mounting and fixing component is arranged on the cutter bar, and the mounting and fixing component is used for fixing the cutting pick. The mounting and fixing assembly comprises a drum-shaped fixing block, a small cutting pick rod, an alloy head, a connecting seat, a welding layer, a waisted arc-shaped surface, a high-strength anti-loosening bolt, a limiting block and a fixing gap, the alloy head can be quickly dismounted and replaced with a new alloy head by unscrewing and screwing the high-strength anti-loosening bolt, the replacement process is greatly simplified through the design, and the replacement efficiency is improved. Compared with a traditional mode, the design does not need complex tools or skills, so that an operator can complete tasks more quickly, and the problems that time and labor are consumed and operation risks are increased due to the fact that in the traditional mode, the whole cutting tooth assembly needs to be disassembled or the alloy head needs to be replaced through a complex tool are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mining, in particular to a split pick-shaped cutting tooth for a coal mining machine. Background Art

[0002] A shearer is an essential tool for coal mining. Coal rock is excavated by cutting with picks fixed to the shearer. The existing pick structure generally consists of a pick body and a tooth head, and the tooth head is brazed to the top of the pick body.

[0003] During the coal and rock excavation process, the tooth head, as the main stress-bearing part, is severely worn and often damaged before the pick body is worn, causing the entire pick to be scrapped, thereby increasing the replacement rate of the pick and increasing the coal mining cost. The traditional replacement method requires disassembling the entire pick assembly or using complex tools to replace the alloy head, which is not only time-consuming and labor-intensive, but also increases operational risks. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides a split pick-type pick for a coal mining machine, which can solve the problem that the traditional replacement method requires disassembling the entire pick assembly or using complex tools to replace the alloy head, which is not only time-consuming and labor-intensive, but also increases operational risks.

[0006] (2) Technical solution

[0007] To achieve the above-mentioned object, the utility model provides the following technical solutions: a split pick-type pick for a coal mining machine, comprising a cutter bar, a mounting and fixing assembly provided on the cutter bar, the mounting and fixing assembly being used to fix the pick, the mounting and fixing assembly comprising a drum-shaped fixing block, a small pick bar, an alloy head, a connecting seat, a welding layer, a waisted arc surface, a high-strength anti-loosening bolt, a limit block and a fixing gap;

[0008] An arc-shaped fixing ring is integrally formed on the tool rod of the installation and fixing assembly, a drum-shaped fixing block is arranged in the arc-shaped fixing ring, a locking hole is opened on the drum-shaped fixing block, a high-strength anti-loosening bolt is arranged in the locking hole, a threaded hole is opened on the tool rod, and the lower end of the high-strength anti-loosening bolt is threadedly connected to the threaded hole;

[0009] The high-strength anti-loosening bolt is used to drive the drum-shaped fixing block to lock downward. When the drum-shaped fixing block moves downward, the small pick rod can be clamped. Multiple small pick rods are arranged between the drum-shaped fixing block and the arc-shaped fixing ring.

[0010] Preferably, the plurality of small pick tooth rods are evenly arranged in a circular array, and the waisted arc surface is opened on the outer surface of the small pick tooth rod, and the waisted arc surface is respectively fitted with the outer surface of the drum-shaped fixing block and the inner surface of the arc-shaped fixing ring, and the plurality of small pick tooth rods are inclined outward.

[0011] Preferably, the plurality of limit blocks are fixedly connected to the inner surface of the arc-shaped fixed ring, and the plurality of limit blocks are evenly arranged in a circular array, and a fixed gap is formed between two adjacent limit blocks, and the plurality of small pick rods are respectively located in the corresponding fixed gaps.

[0012] Preferably, the plurality of connecting seats are respectively fixedly connected to the corresponding small pick rods, and welding grooves are provided on the connecting seats. The alloy heads are arranged in the corresponding welding grooves. The alloy heads are high-performance alloy materials made of tungsten, cobalt and carbide as the main raw materials, and have the characteristics of high hardness, high strength, wear resistance and corrosion resistance.

[0013] Preferably, the alloy head and the welding groove are fixed together by a welding layer, and the outer surface of the alloy head is provided with a wear-resistant layer. The wear-resistant layer is a plasma cladding wear-resistant layer. The plasma cladding technology is used to clad the wear-resistant material on the surface of the pick to form a solid wear-resistant layer. This wear-resistant layer has excellent wear resistance and impact resistance, and is suitable for various harsh working conditions.

[0014] Preferably, a retaining spring groove for mounting the knife rod is provided on the outer surface of the lower end of the knife rod.

[0015] (3) Beneficial effects

[0016] Compared with the prior art, the present invention provides a split pick type pick for a coal mining machine, which has the following beneficial effects:

[0017] 1. The coal mining machine uses a split pick-type pick. By loosening and tightening the high-strength anti-loosening bolts, the alloy head can be quickly removed and replaced with a new one. This design greatly simplifies the replacement process, reducing downtime and maintenance costs. Compared with traditional methods, this design does not require complex tools or skills, allowing operators to complete tasks faster and avoiding the need to disassemble the entire pick assembly or use complex tools to replace the alloy head in traditional methods, which is not only time-consuming and labor-intensive, but also increases operational risks.

[0018] 2. The split pick type pick for coal mining machine has a wear-resistant layer that is a plasma cladding wear-resistant layer. The plasma cladding technology is used to melt the wear-resistant material onto the surface of the pick to form a solid wear-resistant layer. This wear-resistant layer has excellent wear resistance and impact resistance and is suitable for various harsh working conditions.

[0019] 3. The split pick type pick for coal mining machine has an alloy head which is made of high performance alloy material with tungsten, cobalt and carbide as main raw materials, and has the characteristics of high hardness, high strength, wear resistance and corrosion resistance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the structure of the high-strength anti-loosening bolt of the utility model;

[0022] Figure 3 For this utility model Figure 2 Enlarged structural diagram at point A in the middle.

[0023] In the figure: 1. Cutter bar; 2. Arc-shaped fixing ring; 3. Drum-shaped fixing block; 4. Small pick rod; 5. Alloy head; 6. Connecting seat; 7. Welding groove; 8. Welding layer; 9. Wear-resistant layer; 10. Waisted arc surface; 11. Locking hole; 12. High-strength anti-loosening bolt; 13. Threaded hole; 14. Retaining ring groove; 15. Limit block; 16. Fixing gap. DETAILED DESCRIPTION

[0024] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0025] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0026] In the description of this utility model, greater than, less than, exceed, etc. are understood as not including the number itself, and above, below, within, etc. are understood as including the number itself. If there is a description of first or second, it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0027] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0028] See also Figure 1-3 The utility model provides a new technical solution: a split pick type pick for a coal mining machine, comprising a cutter bar 1, a mounting and fixing assembly provided on the cutter bar 1, the mounting and fixing assembly being used to fix the pick, the mounting and fixing assembly comprising a drum fixing block 3, a small pick bar 4, an alloy head 5, a connecting seat 6, a welding layer 8, a waisted arc surface 10, a high-strength anti-loosening bolt 12, a limit block 15 and a fixing gap 16;

[0029] An arc-shaped fixing ring 2 is integrally formed on the tool rod 1 of the installation and fixing assembly. A drum-shaped fixing block 3 is arranged in the arc-shaped fixing ring 2. A locking hole 11 is opened on the drum-shaped fixing block 3. A high-strength anti-loosening bolt 12 is arranged in the locking hole 11. A threaded hole 13 is opened on the tool rod 1. The lower end of the high-strength anti-loosening bolt 12 is threadedly connected to the threaded hole 13.

[0030] The high-strength anti-loosening bolt 12 is used to drive the drum-shaped fixing block 3 to lock downward. When the drum-shaped fixing block 3 moves downward, it can clamp the small pick rod 4. Multiple small pick rods 4 are arranged between the drum-shaped fixing block 3 and the arc-shaped fixing ring 2.

[0031] Furthermore, multiple small pick rods 4 are evenly arranged in a circular array, and a waisted arc surface is opened on the outer surface of the small pick rod. The waisted arc surface 10 is respectively fitted with the outer surface of the drum-shaped fixing block 3 and the inner surface of the arc-shaped fixing ring 2, and multiple welding grooves 7 are inclined outward.

[0032] Furthermore, multiple limit blocks 15 are fixedly connected to the inner surface of the arc-shaped fixed ring 2, and the multiple limit blocks 15 are evenly arranged in a circular array. A fixed gap 16 is formed between two adjacent limit blocks 15, and multiple small pick rods 4 are respectively located in the corresponding fixed gaps 16.

[0033] Furthermore, multiple connecting seats 6 are respectively fixedly connected to the corresponding small pick rods 4, and welding grooves 7 are opened on the connecting seats 6. The alloy heads 5 are all arranged in the corresponding welding grooves 7. The alloy heads 5 are high-performance alloy materials made of tungsten, cobalt and carbide as main raw materials, and have the characteristics of high hardness, high strength, wear resistance and corrosion resistance.

[0034] Furthermore, the alloy head 5 and the welding groove 7 are fixed together by a welding layer 8. The outer surface of the alloy head 5 is provided with a wear-resistant layer 9. The wear-resistant layer 9 is a plasma-clad wear-resistant layer. The wear-resistant material is clad onto the surface of the pick using plasma cladding technology to form a solid wear-resistant layer. This wear-resistant layer has excellent wear resistance and impact resistance, and is suitable for various harsh working conditions.

[0035] Furthermore, a retaining ring groove 14 for mounting the knife rod 1 is provided on the outer surface of the lower end of the knife rod 1 .

[0036] Furthermore, during use, by loosening the high-strength anti-loosening bolt 12, the high-strength anti-loosening bolt 12 can drive the drum fixing block 3 to move upward. At this time, the small pick rod 4 will be out of the restriction of the drum fixing block 3, and the alloy head 5 that needs to be replaced can be replaced. After replacing the new alloy head 5, the high-strength anti-loosening bolt 12 can be tightened to make the high-strength anti-loosening bolt 12 drive the drum fixing block 3 to move downward until the drum fixing block 3 presses the multiple small pick rods 4 into the fixed gap 16. The above operation can enable multiple alloy heads 5 to be quickly replaced. By loosening and tightening the high-strength anti-loosening bolt 12, the alloy head 5 can be quickly removed and replaced with a new alloy head 5. This design greatly simplifies the replacement process, reduces downtime and maintenance costs, and compared with traditional methods, this design does not require complex tools or skills, allowing operators to complete tasks faster, avoiding the need to disassemble the entire pick assembly or use complex tools to replace the alloy head 5 in the traditional method, which is not only time-consuming and labor-intensive, but also increases operational risks.

[0037] Furthermore, the wear-resistant layer 9 is a plasma cladding wear-resistant layer, and the wear-resistant material is clad on the surface of the pick by plasma cladding technology to form a solid wear-resistant layer. This wear-resistant layer has excellent wear resistance and impact resistance and is suitable for various harsh working conditions.

[0038] Furthermore, the alloy head 5 is a high-performance alloy material made of tungsten, cobalt and carbide as main raw materials, and has the characteristics of high hardness, high strength, wear resistance and corrosion resistance.

[0039] Working principle: When in use, by loosening the high-strength anti-loosening bolt 12, the high-strength anti-loosening bolt 12 can drive the drum fixing block 3 to move upward. At this time, the small pick rod 4 will be out of the restriction of the drum fixing block 3. At this time, the alloy head 5 that needs to be replaced can be replaced. After replacing the new alloy head 5, the high-strength anti-loosening bolt 12 can be tightened to make the high-strength anti-loosening bolt 12 drive the drum fixing block 3 to move downward until the drum fixing block 3 presses multiple small pick rods 4 into the fixed gap 16. The above operation enables multiple alloy heads 5 to be quickly replaced.

[0040] Furthermore, the wear-resistant layer 9 is a plasma cladding wear-resistant layer, and the wear-resistant material is clad on the surface of the pick by plasma cladding technology to form a solid wear-resistant layer. This wear-resistant layer has excellent wear resistance and impact resistance and is suitable for various harsh working conditions.

[0041] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A split pick type pick for a coal mining machine, characterized by: The utility model comprises a tool rod (1), wherein the tool rod (1) is provided with a mounting and fixing assembly, the mounting and fixing assembly is used to fix the pick, and the mounting and fixing assembly comprises a drum-shaped fixing block (3), a small pick rod (4), an alloy head (5), a connecting seat (6), a welding layer (8), a waisted arc surface (10), a high-strength anti-loosening bolt (12), a limit block (15) and a fixing gap (16); The knife rod (1) of the mounting and fixing assembly is integrally formed with an arc-shaped fixing ring (2), a drum-shaped fixing block (3) is arranged in the arc-shaped fixing ring (2), a locking hole (11) is provided on the drum-shaped fixing block (3), a high-strength anti-loosening bolt (12) is arranged in the locking hole (11), a threaded hole (13) is provided on the knife rod (1), and the lower end of the high-strength anti-loosening bolt (12) is threadedly connected to the threaded hole (13); The high-strength anti-loosening bolt (12) is used to drive the drum-shaped fixing block (3) to lock downward. When the drum-shaped fixing block (3) moves downward, it can clamp the small pick rod (4). A plurality of small pick rods (4) are arranged between the drum-shaped fixing block (3) and the arc-shaped fixing ring (2).

2. The split pick type pick for a coal mining machine according to claim 1, characterized in that: The plurality of small pick tooth rods (4) are evenly arranged in a circular array, and the waisted arc surface (10) is provided on the outer surface of the small pick tooth rod (4). The waisted arc surface (10) is respectively fitted with the outer surface of the drum-shaped fixing block (3) and the inner surface of the arc-shaped fixing ring (2), and the plurality of small pick tooth rods (4) are inclined outward.

3. The split pick type pick for a coal mining machine according to claim 1, characterized in that: The plurality of limit blocks (15) are fixedly connected to the inner surface of the arc-shaped fixed ring (2), and the plurality of limit blocks (15) are evenly arranged in a circular array. A fixed gap (16) is formed between two adjacent limit blocks (15), and the plurality of small pick rods (4) are respectively located in the corresponding fixed gaps (16).

4. The split pick type pick for a coal mining machine according to claim 3, characterized in that: The plurality of connecting seats (6) are respectively fixedly connected to the corresponding small pick rods (4); the connecting seats (6) are each provided with a welding groove (7); and the alloy heads (5) are each arranged in the corresponding welding groove (7).

5. The split pick type pick for a coal mining machine according to claim 4, characterized in that: The alloy head (5) and the welding groove (7) are fixed together via a welding layer (8), and the outer surface of the alloy head (5) is provided with a wear-resistant layer (9).

6. The split pick type pick for a coal mining machine according to claim 1, characterized in that: The outer surface of the lower end of the knife rod (1) is provided with a retaining spring groove (14) for mounting the knife rod (1).

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