An excavating device for underground metal mining

Abstract

The application relates to the technical field of excavating devices, and discloses an excavating device for underground metal mine exploitation, which comprises an excavating device main body, a bucket assembly arranged on the front side of a connecting rod mechanism of the excavating device main body, two groups of adjusting assemblies arranged on the bucket assembly, two groups of connecting plates movably connected to a connecting mechanism of the excavating device main body, a bucket back plate fixedly arranged at the lower end of the connecting plate, four groups of bucket teeth fixedly arranged at the lower side of the bucket back plate, two groups of equipment seats fixedly arranged at the position close to the connecting plate at the upper end of the bucket back plate, and hydraulic cylinders fixedly arranged at the upper sides of the two groups of equipment seats. The excavating device for underground metal mine exploitation can realize width size adjustment and make the bucket back plates on both sides present a screen bag state to shake the metal mine in the bucket back plate through overall cooperation.

Description

Technical Field

[0001] This invention relates to the field of excavation equipment technology, and in particular to an excavation device for underground metal mining. Background Technology

[0002] Currently, the use of traditional fixed buckets for loading blasted ore in underground metal mining has significant limitations. On the one hand, the uneven particle size distribution of blasted ore leads to a large amount of non-compliant debris being mixed with qualified ore during transportation, increasing unnecessary transportation energy consumption and the workload of subsequent crushing equipment. On the other hand, the fixed structure of traditional buckets cannot adapt to different working conditions. When excavating hard ore bodies, a smaller width is required to concentrate digging force, while a larger volume is needed to improve the efficiency of a single operation when loading loose materials. In addition, the narrow working space traditionally requires separate configuration of excavation and screening equipment, which not only increases equipment investment costs but also causes the operation process to be interrupted due to process changes, seriously affecting mining efficiency. Summary of the Invention

[0003] The main objective of this invention is to provide an excavation device for underground metal mining, which can effectively solve the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] An excavation device for underground metal mining includes a main body. A bucket assembly is located at the front of the linkage mechanism of the main body. Two sets of adjustment components are mounted on the bucket assembly. The bucket assembly includes two sets of connecting plates movably connected to the connecting mechanism of the main body. A bucket back plate is fixedly mounted at the lower end of each connecting plate. Four sets of bucket teeth are fixedly mounted on the lower side of the bucket back plate. Two sets of equipment seats are fixedly mounted at the upper end of the bucket back plate near the connecting plates. Hydraulic cylinders are fixedly installed on the upper side. Two sets of connecting frames are respectively fitted on one side of the telescopic rods of the two sets of hydraulic cylinders. Two sets of limiting plates are fixedly installed on the outer sides of the telescopic rods of the two sets of hydraulic cylinders near the connecting frames. Bucket side plates are fixedly installed on the lower ends of the two sets of connecting frames near the back plate of the bucket. Movable side plates are fixedly installed on one end of the two sets of bucket side plates near the back plate of the bucket. Filter screens are opened on the inner side of the two sets of movable side plates. Side plate grooves are opened on both sides of the back plate of the bucket corresponding to the positions of the movable side plates.

[0006] Preferably, two sets of fixing tubes are fixedly installed on the rear side of the bucket back plate, and the inner side of each of the two sets of fixing tubes is provided with an inner tube hole. Fixing blocks are fixedly installed near the two sets of fixing tubes at the rear end of each of the two sets of bucket side plates. Fixing cylinders are fixedly installed on the rear side of each of the four sets of fixing blocks. Fixing rods are fixedly installed on the inner side of each of the four sets of fixing cylinders. Several sets of ball bearings are movably installed on the inner side of each of the four sets of fixing rods.

[0007] Preferably, the adjustment assembly includes a shielding groove located on the upper side of the side plate slide groove. The shielding groove has an opening near its edge. A shielding plate is slidably disposed on the inner side of the shielding groove. A side strip is fixedly disposed on one end of the shielding plate near the opening. Two sets of fixing plates are fixedly disposed on the upper end of the side strip near its edge. A double-threaded shaft is rotatably disposed on the inner side of each of the two sets of fixing plates. A knob wheel is fixedly disposed on the outer side of each of the two sets of double-threaded shafts. Connecting sleeves are fixedly disposed on the upper ends of the bucket back plate and the bucket side plate near both sides of the two sets of double-threaded shafts. Threaded grooves are opened on the inner sides of each of the four sets of connecting sleeves. A high-frequency hydraulic vibrator is fixedly disposed on the upper end of the bucket back plate near the connecting sleeve. A shielding plate is fixedly disposed on the upper rear end of the bucket back plate.

[0008] Preferably, there are two equipment seats, and the two sets of hydraulic cylinders and connecting frames are mirror-symmetrically arranged, with the connecting frame constrained between the two sets of limiting plates.

[0009] Preferably, the two sets of bucket side plates are respectively attached to both ends of the bucket back plate, the movable side plate is slidably inserted into the inner side of the side plate groove, and the filter screen is correspondingly set at the bottom of the inner side of the bucket back plate.

[0010] Preferably, the fixing cylinders and fixing rods on both sides of the fixing tube are mirror-symmetrically arranged. The fixing rods are movably inserted into the inner tube hole, and several sets of ball bearings are evenly distributed inside the fixing rods and in contact with the inner wall of the inner tube hole.

[0011] Preferably, the shielding groove and opening are connected to the inside of the side plate sliding groove, the shielding plate and side strip are adapted to the shielding groove and opening, the shielding plate and the shielding groove are slidably arranged, and the number of fixing plates is two.

[0012] Preferably, the double-threaded shaft passes through the interior of a set of fixed plates, and the spiral patterns on the outer side of the double-threaded shaft near the two sides of the knob wheel are arranged in opposite directions. The two spiral patterns on the outer side of the double-threaded shaft are respectively threadedly connected to the connecting sleeve and the threaded groove on the bucket side plate and the bucket back plate. The shielding plate is shielded on the upper side of the bucket back plate.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. By rotating the knob wheel, the connected double threaded shaft is rotated clockwise to connect with the threaded groove on the inner side of the connecting sleeve on the corresponding bucket back plate. The double threaded shaft is connected to the side strip and the baffle plate through the fixing plate. Therefore, after the double threaded shaft is threadedly connected to the connecting sleeve on the bucket back plate, the baffle plate is restricted in the baffle groove. When the movable side plate moves, it will not be moved, thus exposing the filter screen. In addition, rotating the knob wheel counterclockwise rotates the double threaded shaft, which is threadedly fixed to the connecting sleeve and the threaded groove on the other side of the bucket side plate. When the movable side plate moves, it moves the double threaded shaft, the fixing plate, the side strip, and the baffle plate together through the connecting sleeve to cover the bottom of the filter screen and prevent the ore in the baffle plate from falling out. Adjust the state of the baffle plate in advance according to the actual process to adapt to the working requirements.

[0015] 2. By activating two sets of hydraulic cylinders, the limiting plates on the telescopic rods of the two sets of hydraulic cylinders push the connecting frames on both sides and the connected bucket side plates to move and unfold to both sides, so that the connected movable side plates move out from the side plate sliding grooves, thereby extending the internal width of the bucket back plate. In conjunction with the adjustment components, the connection between the baffle plate and the bucket side plate can be adjusted. When the filter screen is covered, the capacity of the bucket back plate can be increased, and the width can be adjusted to achieve more efficient metal ore mining. When the baffle plate is opened to cover the filter screen, the two sides of the bucket back plate are in a screen bag state. In conjunction with the use of the main body of the excavation device and the high-frequency hydraulic vibrator, the metal ore inside the bucket back plate is shaken, and the smaller pieces of ore fall off, leaving the screened ore.

[0016] 3. The fixed round bar connected to the side plate of the bucket is driven to move along the fixed tube. The connection between the fixed round bar and the fixed tube improves the rigidity of the extended side plate. In addition, several sets of balls are movably set on the other four sets of fixed round bars, which roll in the inner tube hole during the movement, improving the smoothness of the movement of the side plate. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an excavation device for underground metal mining according to the present invention;

[0018] Figure 2 This is a schematic diagram of the bucket assembly and adjustment assembly of an excavation device for underground metal mining according to the present invention;

[0019] Figure 3 This is a schematic diagram of a partially unfolded movable side plate and a partially cut-out shielding plate of an excavation device for underground metal mining according to the present invention.

[0020] Figure 4 This is a partial structural diagram of a bucket assembly and adjustment assembly for an excavation device used in underground metal mining according to the present invention;

[0021] Figure 5 This is a schematic diagram of the bucket backplate structure of an excavation device for underground metal mining according to the present invention.

[0022] Figure 6 This invention relates to a digging device for underground metal mining. Figure 4 Enlarged structural diagram of section A in the middle;

[0023] Figure 7 This invention relates to a digging device for underground metal mining. Figure 4 Enlarged structural diagram of section B;

[0024] Figure 8 This invention relates to a digging device for underground metal mining. Figure 5 Enlarged structural diagram of section C.

[0025] In the diagram: 1. Main body of the excavating device; 2. Bucket assembly; 21. Connecting plate; 22. Bucket back plate; 23. Bucket teeth; 24. Equipment base; 25. Hydraulic cylinder; 26. Connecting frame; 27. Limiting plate; 28. Bucket side plate; 29. ​​Movable side plate; 210. Filter screen; 211. Side plate groove; 212. Fixed pipe; 213. Inner pipe hole; 214. Fixed block; 215. Fixed cylinder; 216. Fixed round bar; 217. Ball bearing; 3. Adjustment assembly; 31. Covering groove; 32. Opening; 33. Covering plate; 34. Side strip; 35. Fixed plate; 36. Double threaded shaft; 37. Knob wheel; 38. Connecting sleeve; 39. Threaded groove; 310. High-frequency hydraulic vibrator; 311. Covering plate. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0027] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship as a relative relationship of orientation or position, and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0028] Please see Figures 1-8This invention provides an embodiment of an excavation device for underground metal mining, comprising an excavation device body 1, a bucket assembly 2 disposed on the front side of the linkage mechanism of the excavation device body 1, two sets of adjustment components 3 disposed on the bucket assembly 2, the bucket assembly 2 including two sets of connecting plates 21 movably connected to the connecting mechanism of the excavation device body 1, a bucket back plate 22 fixedly disposed at the lower end of the connecting plate 21, four sets of bucket teeth 23 fixedly disposed on the lower side of the bucket back plate 22, and two sets of equipment seats 24 fixedly disposed at the upper end of the bucket back plate 22 near the connecting plate 21. Hydraulic cylinders 25 are fixedly installed on the upper side. Two sets of connecting frames 26 are respectively fitted on one side of the telescopic rods of the two sets of hydraulic cylinders 25. Two sets of limiting plates 27 are fixedly installed on both sides of the telescopic rods of the two sets of hydraulic cylinders 25 near the connecting frames 26. Bucket side plates 28 are fixedly installed on both sides of the lower end of the two sets of connecting frames 26 near the bucket back plate 22. Movable side plates 29 are fixedly installed on one side of the two sets of bucket side plates 28 near the bucket back plate 22. Filter screens 210 are opened on the inner side of the two sets of movable side plates 29. Side plate grooves 211 are opened on both sides of the bucket back plate 22 at the positions corresponding to the movable side plates 29.

[0029] There are two equipment bases 24. The two sets of hydraulic cylinders 25 and connecting frame 26 are mirror-symmetrically arranged. The connecting frame 26 is restricted between two sets of limiting plates 27. The two sets of bucket side plates 28 are respectively attached to both ends of the bucket back plate 22. The movable side plate 29 is slidably inserted into the inside of the side plate groove 211. The filter screen 210 is correspondingly set at the bottom of the inside of the bucket back plate 22.

[0030] By activating two sets of hydraulic cylinders 25, the limiting plates 27 on the telescopic rods of the two sets of hydraulic cylinders 25 respectively push the connecting frames 26 on both sides and the connected bucket side plates 28 to move and unfold to both sides, so that the connected movable side plates 29 are moved out from the side plate slide grooves 211, thereby extending the internal width of the bucket back plate 22. In conjunction with the adjustment component 3, the connection between the baffle plate 33 and the bucket side plates 28 is adjusted. When the filter screen 210 is covered, the capacity of the bucket back plate 22 can be increased, and the width can be adjusted to achieve more efficient metal ore mining. When the baffle plate 33 is opened to cover the filter screen 210, the two sides of the bucket back plate 22 are in a screen bag state. In conjunction with the use of the main body 1 of the excavation device and the high-frequency hydraulic vibrator 310, the metal ore inside the bucket back plate 22 is shaken, and the smaller pieces of ore fall off, leaving the screened ore.

[0031] Two sets of fixing pipes 212 are fixedly installed on the rear side of the bucket back plate 22. The inner side of each of the two sets of fixing pipes 212 is provided with an inner pipe hole 213. The rear end of each of the two sets of bucket side plates 28 is fixedly installed with fixing blocks 214 near the two sets of fixing pipes 212. The rear side of each of the four sets of fixing blocks 214 is fixedly installed with fixing cylinders 215. The inner side of each of the four sets of fixing cylinders 215 is fixedly installed with fixing rods 216. The inner side of each of the four sets of fixing rods 216 is movably provided with several sets of ball bearings 217.

[0032] The fixed cylinders 215 and fixed rods 216 on both sides of the fixed tube 212 are mirror-symmetrically arranged. The fixed rods 216 are movably inserted into the inner tube hole 213. Several sets of balls 217 are evenly distributed inside the fixed rods 216 and contact the inner wall of the inner tube hole 213.

[0033] The fixed round bar 216 connected to the bucket side plate 28 is driven to move along the fixed tube 212. The connection between the fixed round bar 216 and the fixed tube 212 improves the rigidity of the extended movable side plate 29. In addition, several sets of balls 217 are movably set on the other four sets of fixed round bars 216 and roll in the inner tube hole 213 during the movement, improving the smoothness of the movement of the movable side plate 29.

[0034] The adjustment component 3 includes a shielding groove 31 located on the upper side of the side plate slide groove 211. The shielding groove 31 has an opening 32 near its edge. A shielding plate 33 is slidably arranged on the inner side of the shielding groove 31. A side strip 34 is fixedly arranged on one end of the shielding plate 33 near the opening 32. Two sets of fixing plates 35 are fixedly arranged on the upper end of the side strip 34 near its edge. Double threaded shafts 36 are rotatably arranged on the inner side of both sets of fixing plates 35. A knob wheel 37 is fixedly arranged on the outer side of both sets of double threaded shafts 36. Connecting sleeves 38 are fixedly arranged on both sides of the upper end of the bucket back plate 22 and the bucket side plate 28 near the two sets of double threaded shafts 36. Threaded grooves 39 are opened on the inner side of the four sets of connecting sleeves 38. A high-frequency hydraulic vibrator 310 is fixedly arranged on the upper end of the bucket back plate 22 near the connecting sleeves 38. A shielding plate 311 is fixedly arranged on the upper rear end of the bucket back plate 22.

[0035] The shielding groove 31 and opening 32 are connected to the inside of the side plate sliding groove 211. The shielding plate 33 and side strip 34 are adapted to the shielding groove 31 and opening 32. The shielding plate 33 and the shielding groove 31 are slidably arranged. There are two fixed plates 35. The double threaded shaft 36 passes through the inside of the connected set of fixed plates 35. The spiral patterns on the outer side of the double threaded shaft 36 near the knob wheel 37 are arranged in opposite directions. The two spiral patterns on the outer side of the double threaded shaft 36 are threadedly connected to the connecting sleeve 38 and threaded groove 39 on the bucket side plate 28 and the bucket back plate 22, respectively. The shielding piece 311 shields the upper side of the bucket back plate 22.

[0036] Rotating the knob wheel 37 causes the connected double-threaded shaft 36 to rotate clockwise, connecting it to the threaded groove 39 inside the connecting sleeve 38 on one side of the bucket back plate 22. The double-threaded shaft 36 is connected to the side strip 34 and the baffle plate 33 via the fixing plate 35. Therefore, after the double-threaded shaft 36 is threadedly connected to the connecting sleeve 38 on the bucket back plate 22, the baffle plate 33 is confined in the baffle groove 31, preventing it from being moved when the movable side plate 29 moves, thus exposing the filter screen 210. Additionally... Rotating the knob wheel 37 counterclockwise drives the double threaded shaft 36 to rotate, so that the double threaded shaft 36 on the other side is threadedly fixed to the connecting sleeve 38 and threaded groove 39 on the bucket side plate 28. When the movable side plate 29 moves, it drives the double threaded shaft 36, the fixed plate 35, the side strip 34, and the baffle plate 33 to move together through the connecting sleeve 38, so as to cover the bottom of the filter screen 210 and prevent the ore in the baffle plate 33 from falling out. According to the actual process, the state of the baffle plate 33 is adjusted in advance to adapt to the working requirements.

[0037] Working principle: During use, rotating the knob wheel 37 drives the connected double-threaded shaft 36 to rotate clockwise, connecting it to the threaded groove 39 inside the connecting sleeve 38 on one side of the bucket back plate 22. The double-threaded shaft 36 is connected to the side strip 34 and the baffle plate 33 via the fixing plate 35. Therefore, after the double-threaded shaft 36 is threadedly connected to the connecting sleeve 38 on the bucket back plate 22, the baffle plate 33 is confined in the baffle groove 31. When the movable side plate 29 moves, it will not be moved, thus exposing the filter screen 210. Additionally, rotating the knob wheel 37 counterclockwise... The double threaded shaft 36 is rotated, causing the other double threaded shaft 36 to be threadedly fixed to the connecting sleeve 38 and threaded groove 39 on the bucket side plate 28. When the movable side plate 29 moves, it drives the double threaded shaft 36, fixed plate 35, side strip 34, and baffle plate 33 to move together through the connecting sleeve 38, thus blocking the bottom of the filter screen 210 and preventing the ore in the baffle plate 33 from falling out. The state of the baffle plate 33 is adjusted in advance according to the actual process to adapt to the working requirements. Then, by activating the two sets of hydraulic cylinders 25, the limit plates on the extension rods of the two sets of hydraulic cylinders 25 are activated. 27. Push the connecting frames 26 on both sides and the connected bucket side plates 28 to move and unfold to both sides, so that the connected movable side plates 29 can be moved out from the side plate slide grooves 211, thereby extending the internal width of the bucket back plate 22. This, combined with the adjustment assembly 3, adjusts the connection between the baffle plate 33 and the bucket side plates 28. When the filter screen 210 is covered, the capacity of the bucket back plate 22 can be increased, allowing for width adjustment and more efficient metal ore mining. When the baffle plate 33 is opened to cover the filter screen 210, the sides of the bucket back plate 22 are in a screen-like state, thus cooperating with... The use of the high-frequency hydraulic vibrator 310 in the main body 1 of the excavating device shakes the metal ore inside the bucket back plate 22, causing smaller pieces of ore to fall and leaving the screened ore. Meanwhile, the fixed round bar 216 connected to the bucket side plate 28 is driven to move along the fixed pipe 212. The connection between the fixed round bar 216 and the fixed pipe 212 improves the rigidity of the extended movable side plate 29. In addition, several sets of ball bearings 217 movably set on the other four sets of fixed round bars 216 roll in the inner pipe hole 213 during the movement, improving the smoothness of the movement of the movable side plate 29.

[0038] The excavating device body 1, bucket back plate 22, bucket teeth 23, hydraulic cylinder 25, high-frequency hydraulic vibrator 310, and the connection between the excavating device body 1 and the connecting plate 21 are existing technologies and common knowledge in the field. Their working principle is already a well-known technology, and the appropriate model is selected according to actual use, so it will not be explained in detail.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A digging device for underground metal mining, comprising a main body (1) of the digging device, characterized in that: A bucket assembly (2) is provided on the front side of the linkage mechanism of the main body (1) of the excavating device. Two sets of adjustment components (3) are provided on the bucket assembly (2). The bucket assembly (2) includes two sets of connecting plates (21) movably connected to the connecting mechanism of the main body (1) of the excavating device. A bucket back plate (22) is fixedly provided at the lower end of the connecting plate (21). Four sets of bucket teeth (23) are fixedly provided on the lower side of the bucket back plate (22). Two sets of equipment seats (24) are fixedly provided at the upper end of the bucket back plate (22) near the connecting plate (21). Hydraulic cylinders (25) are fixedly provided on the upper side of the two sets of equipment seats (24). Two sets of connecting frames (26) are respectively fitted on one side of the telescopic rod of the hydraulic cylinder (25). Two sets of limiting plates (27) are fixedly installed on the outer sides of the telescopic rods of the two sets of hydraulic cylinders (25) near the connecting frames (26). Two sets of bucket side plates (28) are fixedly installed on the lower ends of the two sets of connecting frames (26) near the bucket back plate (22). One end of the two sets of bucket side plates (28) near the bucket back plate (22) is fixedly installed with a movable side plate (29). A filter screen (210) is opened on the inner side of the two sets of movable side plates (29). Side plate grooves (211) are opened on both sides of the bucket back plate (22) corresponding to the movable side plates (29). The adjustment component (3) includes a shielding groove (31) located on the upper side of the side plate slide groove (211). The shielding groove (31) has an opening (32) near its edge. A shielding plate (33) is slidably disposed on the inner side of the shielding groove (31). A side strip (34) is fixedly disposed on one end of the shielding plate (33) near the opening (32). Two sets of fixing plates (35) are fixedly disposed on the upper end of the side strip (34) near its edge. A double threaded shaft is rotatably disposed on the inner side of each of the two sets of fixing plates (35). (36) A knob wheel (37) is fixedly provided on the outer side of both sets of double threaded shafts (36). A connecting sleeve (38) is fixedly provided on both sides of the upper end of the bucket back plate (22) and the bucket side plate (28) near the two sets of double threaded shafts (36). A threaded groove (39) is opened on the inner side of the four sets of connecting sleeves (38). A high-frequency hydraulic vibrator (310) is fixedly provided on the upper end of the bucket back plate (22) near the connecting sleeve (38). A baffle plate (311) is fixedly provided on the upper rear end of the bucket back plate (22). The shielding groove (31) and opening (32) are connected to the inside of the side plate sliding groove (211). The shielding plate (33) and side strip (34) are adapted to the shielding groove (31) and opening (32). The shielding plate (33) and shielding groove (31) are slidably arranged. The number of fixing plates (35) is two. The double-threaded shaft (36) passes through the interior of a set of fixed plates (35) connected to it. The spiral patterns on the outer side of the double-threaded shaft (36) near the knob wheel (37) are arranged in opposite directions. The two spiral patterns on the outer side of the double-threaded shaft (36) are threadedly connected to the connecting sleeve (38) and the threaded groove (39) on the bucket side plate (28), the bucket back plate (22), and the shielding plate (311) is shielded on the upper side of the bucket back plate (22).

2. The excavation device for underground metal mining according to claim 1, characterized in that: Two sets of fixing tubes (212) are fixedly installed on the rear side of the bucket back plate (22). The inner side of the two sets of fixing tubes (212) is provided with an inner tube hole (213). The rear end of the two sets of bucket side plates (28) is fixedly installed with fixing blocks (214) near the two sets of fixing tubes (212). The rear side of the four sets of fixing blocks (214) is fixedly installed with fixing cylinders (215). The inner side of the four sets of fixing cylinders (215) is fixedly installed with fixing rods (216). The inner side of the four sets of fixing rods (216) is movably provided with several sets of ball bearings (217).

3. The excavation device for underground metal mining according to claim 1, characterized in that: The number of the equipment base (24) is two, the two sets of hydraulic cylinders (25) and connecting frame (26) are mirror-symmetrically arranged, and the connecting frame (26) is restricted between two sets of limiting plates (27).

4. The excavation device for underground metal mining according to claim 1, characterized in that: The two sets of bucket side plates (28) are respectively attached to both ends of the bucket back plate (22), the movable side plate (29) is slidably inserted into the inner side of the side plate groove (211), and the filter screen (210) is correspondingly set at the bottom of the inner side of the bucket back plate (22).

5. A mining device for underground metal mining according to claim 2, characterized in that: The fixed cylinder (215) and fixed rod (216) on both sides of the fixed tube (212) are mirror-symmetrically arranged. The fixed rod (216) is movably inserted into the inner tube hole (213). Several sets of balls (217) are evenly distributed inside the fixed rod (216) and contact the inner wall of the inner tube hole (213).

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