Mechanical arm structure for mining machinery

Abstract

The present invention relates to the technical field of mining machinery, and specifically to a mechanical arm structure for mining machinery, comprising: a base end is rotatably connected to a large arm, an end of the large arm away from the base is connected to a middle arm, an end of the middle arm away from the large arm is rotatably connected to a crushing head, and an end of the crushing head away from the middle arm is installed with a drill bit; a mounting base is fixedly installed on one side of the crushing head, a fixed shell is connected to the surface of the mounting base by bolts, and a liquid extraction pipe is fixedly installed between the fixed shell and the mounting base; a water spray ring is arranged on the outside of the drill bit, a spray hole is opened on the inside of the water spray ring, and a rotating seat is arranged on the inside of the water spray ring; a liquid extraction column is driven to reciprocate by a piston rod inside the crushing head, and cooling hydraulic pressure is sent to the inside of the water spray ring, and sprayed on the surface of the drill bit through the spray hole to achieve cooling of the drill bit, thereby avoiding the problem that the coolant is difficult to drip onto the drill bit when the drill bit performs non-vertical operation.

Description

Technical Field

[0001] The present invention relates to the technical field of mining machinery, and in particular to a mechanical arm structure used for mining machinery. Background Art

[0002] The manipulator arm of mining machinery is an important equipment for operation in mines. Depending on the different manipulator arms, it can be used for material handling, loading and crushing operations, etc. It can perform high-intensity and high-precision operations in the harsh environment of Kunshan.

[0003] In the prior art, the patent with publication number CN115157282B discloses a hydraulic mechanical arm for mining machinery, in which coolant is introduced into the connecting pipe 1, and the coolant flows along the fixed ring after entering the connecting ring. After the coolant fills the connecting ring, the pressure inside the connecting ring increases, and the coolant squeezes the beads and drips along the leakage groove 2 opened inside the groove, so that the dripping coolant can flow along the connecting pipe 2 to the surface of the drill bit, and the surface of the drill bit is cooled, which has the characteristics of strong practicality;

[0004] However, in the above technology, when the drill bit performs non-vertical operation, it is difficult for the coolant to drip onto the drill bit, resulting in a decrease in the cooling effect of the drill bit. Moreover, when the drill bit performs high-frequency and low-amplitude operation, it is difficult for the stuck bead to escape from the second leakage groove under the action of vibration, resulting in the coolant being unable to drip, thereby making it impossible to cool the drill bit. Summary of the invention

[0005] The object of the present invention is to provide a mechanical arm structure for mining machinery to solve the problems raised by the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A mechanical arm structure for mining machinery, comprising:

[0008] A base, one end of the base is rotatably connected to a large arm, an end of the large arm away from the base is connected to a middle arm, an end of the middle arm away from the large arm is rotatably connected to a crushing head, and an end of the crushing head away from the middle arm is equipped with a drill bit;

[0009] A mounting base is fixedly installed on one side of the crushing head, a fixed shell is connected to the surface of the mounting base by bolts, a liquid extraction tube is fixedly installed between the fixed shell and the mounting base, a liquid extraction column is slidably arranged inside the liquid extraction tube, and a liquid inlet and a liquid guide groove are arranged inside the liquid extraction column;

[0010] A water spray ring is arranged on the outside of the drill bit, a spray hole is opened on the inside of the water spray ring, and a rotating seat is arranged on the inside of the water spray ring. An impeller is rotatably arranged inside the water spray ring, and the water spray ring is connected with the liquid extraction pipe through a connecting pipe and a conducting pipe.

[0011] Preferably, a cylinder 1 is connected between the base and the boom, and the cylinder 1 is used to control the swing of the boom. A cylinder 2 is connected between the boom and the middle arm, and the cylinder 2 is used to control the swing of the middle arm. A cylinder 3 is arranged between the middle arm and the crushing head, and the cylinder 3 is used to control the swing of the crushing head.

[0012] Preferably, an oil inlet pipe and an oil outlet pipe are connected to the surface of the crushing head, and a piston rod is arranged inside the crushing head.

[0013] Preferably, the top of the liquid extraction tube is connected to a liquid inlet pipe, which is used to transport coolant to the interior of the liquid extraction tube. A lifting connecting rod is slidably inserted at the bottom of the liquid extraction tube. One end of the lifting connecting rod extends to the outside of the liquid extraction tube and is fixedly connected to a support rod. The support rod is fixedly connected to the piston rod inside the crushing head.

[0014] Preferably, the liquid extraction column is fixedly connected to one end of the liquid extraction column located inside the liquid extraction tube, the liquid inlet is opened at the end of the liquid extraction column away from the lifting connecting rod, a lifting bin is opened at the end of the liquid inlet close to the lifting connecting rod, an air hole is opened at the end of the lifting bin away from the liquid inlet, the liquid guide groove is connected to one side of the lifting bin, and a lifting column is slidably arranged inside the lifting bin.

[0015] Preferably, a plug is fixedly connected to one end of the lifting column close to the liquid inlet, the plug can be inserted into the liquid inlet, and a compression spring is arranged at one end of the lifting column away from the liquid inlet.

[0016] Preferably, the water spray ring is an annular shell structure, the water spray ring is fixedly connected to the connecting pipe, the conducting pipe is arranged between the connecting pipe and the liquid extraction pipe, the bottom of the water spray ring on the side close to the drill bit is arranged as an inclined surface, the spray holes are arranged on the inclined surface of the water spray ring, and the spray holes are arranged in a circular array in multiple groups.

[0017] Preferably, a plurality of groups of blades are arranged in a circular array inside the impeller, the spacing between two adjacent groups of blades is smaller than the inner diameter of the connecting pipe, and a rotating ring is fixedly connected to the inner side of the impeller.

[0018] Preferably, the rotating ring is rotatably arranged inside the rotating seat, a plurality of sets of mounting seat plates are fixedly mounted on the inner side of the rotating ring, and bristles are arranged on the side of the mounting seat plates facing the drill bit.

[0019] Preferably, the connecting pipe conveys the coolant to the inside of the water spray ring, and the coolant drives the impeller to rotate when passing through the blades, and the impeller drives the bristles to brush the surface of the drill bit through the rotating ring and the mounting seat plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The piston rod inside the crushing head drives the pumping column to reciprocate, and the cooling hydraulic pressure is sent to the inside of the water spray ring, and sprayed on the surface of the drill bit through the spray hole to cool the drill bit, thereby avoiding the problem that the coolant is difficult to drip onto the drill bit when the drill bit is performing non-vertical operation. At the same time, it also avoids the problem that when the drill bit is performing high-frequency and low-amplitude operation, the stuck bead is difficult to separate from the leakage groove 2 under the action of vibration, resulting in the coolant being unable to drip, and then the drill bit cannot be cooled.

[0022] 2. The flow of coolant drives the impeller to rotate, so that the impeller drives the mounting plate to rotate around the drill bit through the rotating ring. At this time, the bristles will evenly scrape the coolant sprayed on the surface of the drill bit, so that the coolant on the surface of the drill bit can evaporate quickly, thereby improving the cooling efficiency of the drill bit. At the same time, the scraping of the drill bit surface by the bristles can also achieve the surface cleaning effect of the drill bit. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 It is a cross-sectional schematic diagram of the water spray ring of the present invention;

[0025] Figure 3 This is a cross-sectional view of the vertical liquid extraction pipe of the present invention;

[0026] Figure 4 For the present invention Figure 3 The enlarged schematic diagram at A in the middle;

[0027] Figure 5 It is a schematic diagram of the structure of the liquid extraction column of the present invention;

[0028] Figure 6 It is a schematic diagram of the impeller structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the connection between the liquid extraction pipe and the water spray ring of the present invention.

[0030] In the figure: base 1, cylinder 1 11, upper arm 2, cylinder 2 21, middle arm 3, cylinder 3 31, crushing head 4, oil inlet pipe 41, oil outlet pipe 42, mounting base 43, fixed shell 44, drill bit 45, liquid extraction pipe 5, liquid inlet pipe 51, lifting connecting rod 6, supporting rod 61, liquid extraction column 62, liquid inlet 63, lifting bin 64, air hole 65, liquid guide groove 66, lifting column 67, plug column 68, compression spring 69, water spray ring 7, connecting pipe 71, conducting pipe 72, rotating seat 73, spray hole 74, impeller 8, blades 81, rotating ring 82, mounting seat plate 83, bristles 84. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0032] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0033] In addition, in the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. However, if it is indicated as a direct connection, it means that the two connected bodies are not connected through a transition structure, but are connected to form a whole through a connecting structure. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0035] In the present invention, unless otherwise clearly specified and limited, the first feature "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0036] Please refer to the attached Figure 1 To Attachment Figure 7 As shown, the present invention provides a mechanical arm structure for mining machinery, comprising:

[0037] One end of the base 1 is rotatably connected to a boom 2, an end of the boom 2 away from the base 1 is connected to a middle arm 3, an end of the middle arm 3 away from the boom 2 is rotatably connected to a crushing head 4, an oil cylinder 11 is connected between the base 1 and the boom 2, the oil cylinder 11 is used to control the swing of the boom 2, an oil cylinder 21 is connected between the boom 2 and the middle arm 3, the oil cylinder 21 is used to control the swing of the middle arm 3, an oil cylinder 3 31 is provided between the middle arm 3 and the crushing head 4, the oil cylinder 3 31 is used to control the swing of the crushing head 4, an oil inlet pipe 41 and an oil outlet pipe 42 are connected to the surface of the crushing head 4, a piston rod is provided inside the crushing head 4, and a drill bit 45 is installed at the end of the crushing head 4 away from the middle arm 3;

[0038] A mounting base 43 is fixedly installed on one side of the crushing head 4, and a fixed shell 44 is connected to the surface of the mounting base 43 by bolts. A liquid extraction tube 5 is fixedly installed between the fixed shell 44 and the mounting base 43, and a liquid inlet pipe 51 is connected to the top of the liquid extraction tube 5. The liquid inlet pipe 51 is used to transport coolant to the inside of the liquid extraction tube 5. A lifting connecting rod 6 is slidably inserted at the bottom of the liquid extraction tube 5. One end of the lifting connecting rod 6 extends to the outside of the liquid extraction tube 5 and is fixedly connected to a supporting rod 61. The supporting rod 61 is fixedly connected to the piston rod inside the crushing head 4, and a liquid extraction column 62 is fixedly connected to one end of the liquid extraction column 62 located inside the liquid extraction tube 5. The liquid inlet 63 is opened at the bottom of the liquid extraction tube 5. The end of the liquid extraction column 62 is away from the lifting connecting rod 6, and the end of the liquid inlet 63 close to the lifting connecting rod 6 is provided with a lifting chamber 64, and the end of the lifting chamber 64 away from the liquid inlet 63 is provided with an air hole 65, and the liquid guide groove 66 is communicated with one side of the lifting chamber 64, and a lifting column 67 is slidably provided inside the lifting chamber 64, and a plug column 68 is fixedly connected to the end of the lifting column 67 close to the liquid inlet 63, and the plug column 68 can be inserted into the liquid inlet 63, and a compression spring 69 is provided at the end of the lifting column 67 away from the liquid inlet 63, and the liquid extraction column 62 is slidably provided inside the liquid extraction tube 5, and the liquid extraction column 62 is provided with a liquid inlet 63 and a liquid guide groove 66;

[0039] A water spray ring 7 is arranged on the outside of the drill bit 45, a spray hole 74 is opened on the inside of the water spray ring 7, and a rotating seat 73 is arranged on the inside of the water spray ring 7. An impeller 8 is rotatably arranged inside the water spray ring 7. The water spray ring 7 is connected with the liquid extraction pipe 5 through a connecting pipe 71 and a conducting pipe 72. The water spray ring 7 is an annular shell structure. The water spray ring 7 is fixedly connected to the connecting pipe 71. The conducting pipe 72 is arranged between the connecting pipe 71 and the liquid extraction pipe 5. The bottom of the water spray ring 7 close to the drill bit 45 is arranged as an inclined surface. The spray hole 74 is opened on the inclined surface of the water spray ring 7. The spray holes 74 are arranged in a circular array in multiple groups. The impeller A plurality of groups of blades 81 are arranged in a circular array inside 8, and the spacing between two adjacent groups of blades 81 is smaller than the inner diameter of the connecting pipe 71. A rotating ring 82 is fixedly connected to the inner side of the impeller 8, and the rotating ring 82 is rotatably arranged inside the rotating seat 73. A plurality of groups of mounting seat plates 83 are fixedly installed on the inner side of the rotating ring 82, and a brush 84 is arranged on the side of the mounting seat plate 83 facing the drill bit 45. The connecting pipe 71 transports the coolant to the inside of the water spray ring 7, and the coolant pushes the impeller 8 to rotate when passing through the blades 81, and the impeller 8 drives the bristles 84 to brush the surface of the drill bit 45 through the rotating ring 82 and the mounting seat plate 83.

[0040] As a further improvement of the present invention, when the robot arm is working, the piston rod inside the crushing head 4 drives the lifting connecting rod 6 to reciprocate through the supporting rod 61, and the lifting connecting rod 6 drives the supporting rod 61 to reciprocate inside the liquid extraction pipe 5. When the liquid extraction column 62 moves in the direction close to the liquid inlet pipe 51, the pressure on the side of the liquid extraction column 62 close to the liquid inlet pipe 51 pushes the lifting column 67 to retract into the inside of the lifting bin 64, so that the liquid inlet 63 is connected with the liquid guide groove 66. When the liquid extraction column 62 moves in the direction away from the liquid inlet pipe 51, the gas on the side of the liquid extraction column 62 away from the liquid inlet pipe 51 The pressure and compression spring 69 press the lifting column 67 toward the liquid inlet 63, so that the plug 68 is inserted into the inside of the liquid inlet 63 and the liquid guide groove 66 is blocked. In this way, the coolant is pumped into the inside of the liquid extraction pipe 5 through the liquid inlet pipe 51, and the coolant passes through the liquid inlet 63 and the liquid guide groove 66 and enters the side of the liquid extraction column 62 away from the liquid inlet pipe 51. During the movement of the liquid extraction column 62, the coolant is pressed into the inside of the water spray ring 7 through the guide pipe 72 and the connecting pipe 71, and then sprayed on the surface of the drill bit 45 through the spray hole 74 to achieve cooling of the drill bit 45;

[0041] The piston rod inside the crushing head 4 is controlled to reciprocate and rise and fall through the oil inlet pipe 41, the oil outlet pipe 42 and the reversing valve inside the crushing head 4 to hit the drill bit 45. This technology is a prior art, well known and commonly used by those skilled in the art, so it will not be described in detail in this case.

[0042] The piston rod inside the crushing head 4 drives the pumping column 62 to reciprocate, and the cooling hydraulic pressure is sent to the inside of the water spray ring 7, and is sprayed on the surface of the drill bit 45 through the spray hole 74 to cool the drill bit 45, thereby avoiding the problem that the coolant is difficult to drip onto the drill bit when the drill bit is performing non-vertical operation. At the same time, it also avoids the problem that when the drill bit is performing high-frequency and low-amplitude operation, the stuck bead is difficult to separate from the leakage groove 2 under the action of vibration, thereby causing the coolant to be unable to drip, and then causing the drill bit to be unable to be cooled.

[0043] As a further improvement of the present invention, when the coolant enters the interior of the water spray ring 7 through the connecting pipe 71, the coolant will pass between the blades 81, and the impact force of the coolant will drive the impeller 8 to rotate through the blades 81, so that the impeller 8 drives the mounting plate 83 to rotate around the drill bit 45 through the rotating ring 82. At this time, the bristles 84 will evenly scrape the coolant sprayed on the surface of the drill bit 45, so that the coolant on the surface of the drill bit 45 can evaporate quickly, thereby improving the efficiency of cooling the drill bit 45. At the same time, the scraping of the surface of the drill bit 45 by the bristles 84 can also achieve the cleaning effect of the surface of the drill bit 45.

[0044] Working principle: The present invention proposes a mechanical arm structure for mining machinery. When working, the piston rod inside the crushing head 4 drives the lifting connecting rod 6 to reciprocate through the supporting rod 61, and the lifting connecting rod 6 drives the supporting rod 61 to reciprocate inside the liquid pumping tube 5. When the liquid pumping column 62 moves in the direction close to the liquid inlet tube 51, the pressure on the side of the liquid pumping column 62 close to the liquid inlet tube 51 pushes the lifting column 67 to retract into the inside of the lifting bin 64, so that the liquid inlet 63 is connected with the liquid guide groove 66. When the liquid pumping column 62 moves in the direction away from the liquid inlet tube 51, the air pressure on the side of the liquid pumping column 62 away from the liquid inlet tube 51 and the compression spring 69 press the lifting column 67 toward the liquid inlet 63, so that the plug column 68 is inserted into the inside of the liquid inlet 63 to block the liquid guide groove 66, and the coolant is reciprocated through the liquid inlet tube. 51 is drawn into the interior of the liquid extraction pipe 5, and the coolant passes through the liquid inlet 63 and the liquid guide groove 66 and then enters the side of the liquid extraction column 62 away from the liquid inlet pipe 51. During the movement of the liquid extraction column 62, the coolant is pressed into the interior of the water spray ring 7 through the guide pipe 72 and the connecting pipe 71, and then sprayed on the surface of the drill bit 45 through the spray hole 74 to achieve cooling of the drill bit 45. When the coolant enters the interior of the water spray ring 7 through the connecting pipe 71, the coolant will pass between the blades 81. The impact force of the coolant will drive the impeller 8 to rotate through the blades 81, so that the impeller 8 drives the mounting plate 83 to rotate around the drill bit 45 through the rotating ring 82. At this time, the bristles 84 will evenly scrape the coolant sprayed on the surface of the drill bit 45, so that the coolant on the surface of the drill bit 45 can evaporate quickly.

[0045] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may also be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0046] It should be noted that the robotic arm of the present invention can also be used as the arm of a humanoid robot for mineral resource exploration. The robotic arm can be used to drill holes in ore, etc., so that the humanoid robot can crush and collect the ore, thereby facilitating subsequent analysis of the ore.

[0047] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mechanical arm structure for a mining machine, comprising a base (1), characterized in that: One end of the base (1) is rotatably connected to a large arm (2), an end of the large arm (2) away from the base (1) is connected to a middle arm (3), an end of the middle arm (3) away from the large arm (2) is rotatably connected to a crushing head (4), and an end of the crushing head (4) away from the middle arm (3) is mounted with a drill bit (45); A mounting base (43) is fixedly mounted on one side of the crushing head (4), a fixed shell (44) is connected to the surface of the mounting base (43) via bolts, a liquid extraction tube (5) is fixedly mounted between the fixed shell (44) and the mounting base (43), a liquid extraction column (62) is slidably disposed inside the liquid extraction tube (5), and a liquid inlet (63) and a liquid guide groove (66) are provided inside the liquid extraction column (62); A water spray ring (7) is arranged on the outside of the drill bit (45), a spray hole (74) is opened on the inside of the water spray ring (7), and a rotating seat (73) is arranged on the inside of the water spray ring (7). An impeller (8) is rotatably arranged inside the water spray ring (7), and the water spray ring (7) is connected to the liquid extraction pipe (5) through a connecting pipe (71) and a conducting pipe (72); An oil inlet pipe (41) and an oil outlet pipe (42) are connected to the surface of the crushing head (4), and a piston rod is arranged inside the crushing head (4); The top of the liquid extraction pipe (5) is connected to a liquid inlet pipe (51), and the liquid inlet pipe (51) is used to transport cooling liquid to the inside of the liquid extraction pipe (5). The bottom of the liquid extraction pipe (5) is slidably plugged with a lifting connecting rod (6), and one end of the lifting connecting rod (6) extends to the outside of the liquid extraction pipe (5) and is fixedly connected to a supporting rod (61). The supporting rod (61) is fixedly connected to the piston rod inside the crushing head (4); The liquid extraction column (62) is fixedly connected to one end of the liquid extraction column (62) located inside the liquid extraction tube (5); the liquid inlet (63) is provided at one end of the liquid extraction column (62) away from the lifting connecting rod (6); a lifting chamber (64) is provided at one end of the liquid inlet (63) close to the lifting connecting rod (6); an air hole (65) is provided at one end of the lifting chamber (64) away from the liquid inlet (63); the liquid guide groove (66) is communicated with one side of the lifting chamber (64); and a lifting column (67) is slidably provided inside the lifting chamber (64); One end of the lifting column (67) close to the liquid inlet (63) is fixedly connected to a plug column (68), and the plug column (68) can be inserted into the interior of the liquid inlet (63). One end of the lifting column (67) away from the liquid inlet (63) is provided with a compression spring (69).

2. The mechanical arm structure for mining machinery according to claim 1, characterized in that: A cylinder 1 (11) is connected between the base (1) and the upper arm (2), and the cylinder 1 (11) is used to control the swing of the upper arm (2). A cylinder 2 (21) is connected between the upper arm (2) and the middle arm (3), and the cylinder 2 (21) is used to control the swing of the middle arm (3). A cylinder 3 (31) is provided between the middle arm (3) and the crushing head (4), and the cylinder 3 (31) is used to control the swing of the crushing head (4).

3. The mechanical arm structure for mining machinery according to claim 1, characterized in that: The water spray ring (7) is in an annular shell structure. The water spray ring (7) is fixedly connected to the connecting pipe (71). The conducting pipe (72) is arranged between the connecting pipe (71) and the liquid extraction pipe (5). The bottom of the water spray ring (7) on a side close to the drill bit (45) is arranged as an inclined surface. The spray holes (74) are arranged on the inclined surface of the water spray ring (7). The spray holes (74) are arranged in a plurality of groups in a circular array.

4. The mechanical arm structure for mining machinery according to claim 3, characterized in that: The impeller (8) has multiple groups of blades (81) arranged in a circular array inside, the spacing between two adjacent groups of blades (81) is smaller than the inner diameter of the connecting pipe (71), and a rotating ring (82) is fixedly connected to the inner side of the impeller (8).

5. The mechanical arm structure for mining machinery according to claim 4, characterized in that: The rotating ring (82) is rotatably arranged inside the rotating seat (73), and a plurality of sets of mounting seat plates (83) are fixedly mounted on the inner side of the rotating ring (82). Brush bristles (84) are arranged on the side of the mounting seat plates (83) facing the drill bit (45).

6. The mechanical arm structure for mining machinery according to claim 5, characterized in that: The connecting pipe (71) transports the coolant to the interior of the water spray ring (7); the coolant drives the impeller (8) to rotate when passing through the blades (81); and the impeller (8) drives the bristles (84) to brush the surface of the drill bit (45) via the rotating ring (82) and the mounting seat plate (83).

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