Self-notching machine

Abstract

The present invention discloses a self-notching machine, comprising a frame, a first cutting device and a second cutting device; the frame has a traveling portion for connecting to a scraper conveyor; the first cutting device comprises a plurality of drill bit groups arranged in sequence along the traveling direction of the frame, the drill bit groups being rotatably connected to the frame to form a circular cutting area; the second cutting device is spaced apart from the first cutting device, the diameter of the cutting area formed by the plurality of drill bit groups decreasing in sequence in a direction away from the second cutting device, the second cutting device comprises a swing arm and a cutting drum, the swing arm being swingably connected to the frame, and the cutting drum being rotatably connected to the swing arm. The self-notching machine of an embodiment of the present invention can cut the coal wall of a fully mechanized mining face to form a notch for a coal mining machine to directly enter the coal wall, and the coal mining machine can enter the coal wall without adopting an oblique cutting method, thereby improving the coal mining efficiency and the advancement speed of the fully mechanized mining face.

Description

Technical Field

[0001] The invention relates to the technical field of coal mining equipment, in particular to a self-notching machine. Background Art

[0002] Currently, when shearers are mining in fully mechanized coal mining faces, they cannot directly enter the coal wall. They must use an oblique cutting method to force the shearer body into the coal wall to properly cut coal. This process involves numerous and complex steps, including shearing, body leveling, pushing and sliding, reverse cutting, and clearing loose coal with an empty cutter. Furthermore, the shearer's cutting speed is slow during this process, severely impacting the advancement of the fully mechanized coal mining face. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention proposes a self-notching machine that can cut the coal wall of the comprehensive mining working face to form a notch. The coal mining machine can directly enter the coal wall through the notch to cut coal. The coal mining machine does not need to adopt an oblique cutting method to enter the coal wall, which can increase the coal cutting speed of the coal mining machine, thereby improving the advancement speed and production efficiency of the comprehensive mining working face.

[0005] 18. The self-notching machine of claim 17, wherein the frame comprises a first cutting device and a second cutting device; the frame comprises a walking portion for connecting a scraper conveyor; the first cutting device comprises a plurality of drill bit groups arranged in sequence along the walking direction of the frame, the drill bit groups being rotatably connected to the frame to form a circular cutting area, the rotation axis of the drill bit group relative to the frame being consistent with the walking direction of the frame; the second cutting device and the first cutting device are arranged at intervals along the walking direction of the frame, the diameter of the cutting area formed by the plurality of drill bit groups decreasing in sequence in the direction away from the second cutting device, the second cutting device comprises a swing arm and a cutting drum, the swing arm being swingably connected to the frame, the cutting drum being rotatably connected to the swing arm, the swing axis of the swing arm relative to the frame being perpendicular to the rotation axis of the drill bit group relative to the frame, and the rotation axis of the cutting drum relative to the swing arm being parallel to the swing axis of the swing arm relative to the frame.

[0006] In some embodiments, the drill bit group includes a rotating seat and multiple drill bits, the rotating seat is rotatably connected to the frame, the multiple drill bits are evenly arranged along the circumference of the rotating seat, the drill bits are rotatably connected to the rotating seat, and the rotation axis of the drill bits relative to the rotating seat is perpendicular to the rotation axis of the rotating seat relative to the frame.

[0007] In some embodiments, the drill bit includes a tooth seat and a plurality of first cutting teeth, the tooth seat is rotatably connected to the rotating seat, the tooth seat extends radially outward along the rotating seat, the cross-section of a part of the tooth seat away from the rotating seat gradually decreases from the inside to the outside, and the plurality of first cutting teeth are arranged in a spiral shape along the extension direction of the tooth seat.

[0008] In some embodiments, the self-notching machine also includes a transmission device, which includes a transmission shaft and multiple transmission components. The transmission shaft is rotatably connected to the frame, and multiple rotating seats are connected to the transmission shaft. The transmission components correspond to the rotating seats one by one, and the rotating seats and the drill bit are connected through the transmission components so that the rotating seats and the drill bit rotate synchronously.

[0009] In some embodiments, the transmission assembly includes a driving bevel gear and a plurality of driven bevel gears meshing with the driving bevel gear, the driving bevel gear is connected to the transmission shaft, and the driven bevel gears are in one-to-one correspondence and connected to the drill bit.

[0010] In some embodiments, the transmission assembly includes a worm wheel, a worm, a first bevel gear and a second bevel gear, the worm wheel is connected to the transmission shaft, the worm is meshed with the worm wheel, the first bevel gear and the worm are coaxially arranged and rotate synchronously, the second bevel gear is meshed with the first bevel gear, and the second bevel gear is connected to the drill bit.

[0011] In some embodiments, the number of the first cutting devices is two, and the two first cutting devices are arranged opposite to each other on both sides of the second cutting device.

[0012] In some embodiments, the cutting drum includes a drum body and a plurality of second cutting teeth, the drum body is rotatably connected to the swing arm, the second cutting teeth are connected to the drum body, and the plurality of second cutting teeth are spirally arranged along the axial direction of the drum body.

[0013] In some embodiments, a diameter of the cutting zone formed by the drill bit group arranged near the second cutting device is equal to an axial length of the drum body.

[0014] In some embodiments, the second cutting device further includes a swing driving member, which includes a cylinder body and a telescopic body, wherein the cylinder body is hinged to the frame, the telescopic body is hinged to the swing arm, and the telescopic body is telescopically connected to the cylinder body.

[0015] The self-notching machine of the embodiment of the present invention is suitable for cutting the coal wall of the fully-mechanized mining working face to form a notch, and the coal shearer can directly enter the coal wall through the notch to cut coal; in other words, the coal shearer can enter the coal wall without adopting an oblique cutting method, which can increase the coal cutting speed of the coal shearer, thereby improving the advancement speed and production efficiency of the fully-mechanized mining working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view schematic diagram of the relative positions of the self-notching machine and the coal wall according to one embodiment of the present invention.

[0017] Figure 2 It is a structural schematic diagram of a self-notching machine according to an embodiment of the present invention.

[0018] Figure 3 It is a structural schematic diagram from another angle of the self-notching machine according to one embodiment of the present invention (there is only one jack in the figure).

[0019] Figure 4 It is a structural schematic diagram of a drill bit assembly of a self-notching machine according to an embodiment of the present invention.

[0020] Figure 5 The drill bit of the self-notching machine of the embodiment of the present invention is Figure 4 Schematic diagram of the structure in the A direction.

[0021] Figure 6 It is a schematic diagram of the principle of the transmission assembly of the self-notching machine according to one embodiment of the present invention.

[0022] Figure 7 It is a schematic diagram of the principle of the transmission assembly of the self-notching machine according to another embodiment of the present invention.

[0023] Figure 8 It is a structural schematic diagram from another angle of the self-notching machine according to one embodiment of the present invention (there are two jacks in the figure).

[0024] Figure 9 It is a schematic structural diagram of the cutting drum of the self-notching machine according to an embodiment of the present invention.

[0025] Reference numerals:

[0026] 100. Self-notching machine;

[0027] 1. Frame; 11. Traveling unit;

[0028] 2. First cutting device; 21. Drill bit assembly; 211. Rotating seat; 2111. Mounting surface; 212. Drill bit; 2121. Tooth holder; 2121-1. First portion; 2121-2. Second portion; 2122. First cutting tooth;

[0029] 3. Second cutting device; 31. Swing arm; 311. First end; 312. Second end; 32. Cutting drum; 321. Drum body; 322. Second cutting tooth;

[0030] 4. Drive shaft;

[0031] 5. Transmission assembly; 51. Driving bevel gear; 52. Driven bevel gear; 521. Driven shaft; 53. Worm gear; 54. Worm; 55. First bevel gear; 56. Second bevel gear; 561. Rotating shaft;

[0032] 6. Jack; 61. Cylinder; 62. Telescopic body;

[0033] 200, coal wall;

[0034] 300. Scraper conveyor. DETAILED DESCRIPTION

[0035] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] like Figures 1 to 3 As shown, the self-notching machine 100 of the embodiment of the present invention includes a frame 1, a first cutting device 2 and a second cutting device 3; the frame 1 has a walking portion 11 for connecting to a scraper conveyor 300; the first cutting device 2 includes a plurality of drill bit groups 21 arranged in sequence along the walking direction of the frame 1, and the drill bit group 21 is rotatably connected to the frame 1 to form a circular cutting area, and the rotation axis of the drill bit group 21 relative to the frame 1 is consistent with the walking direction of the frame 1; the second cutting device 3 and the first cutting device 2 are arranged along the frame 1 is arranged at intervals in the traveling direction of the drill bit group 21, and the diameter of the cutting area formed by the multiple drill bit groups 21 decreases successively in the direction away from the second cutting device 3. The second cutting device 3 includes a swing arm 31 and a cutting drum 32. The swing arm 31 is swingably connected to the frame 1, and the cutting drum 32 is rotatably connected to the swing arm 31. The swing axis of the swing arm 31 relative to the frame 1 is perpendicular to the rotation axis of the drill bit group 21 relative to the frame 1, and the rotation axis of the cutting drum 32 relative to the swing arm 31 is parallel to the swing axis of the swing arm 31 relative to the frame 1.

[0037] The self-notching machine 100 of the embodiment of the present invention is suitable for cutting the coal wall 200 of the fully-mechanized mining working face to form a notch, through which the coal mining machine can directly enter the coal wall 200 to cut coal; in other words, the coal mining machine can enter the coal wall 200 without adopting an oblique cutting method, which can increase the coal cutting speed of the coal mining machine, thereby improving the advancement speed and production efficiency of the fully-mechanized mining working face.

[0038] The self-notching machine 100 of the embodiment of the present invention has a frame 1 connected to the scraper conveyor 300 through a walking part 11, so that the self-notching machine 100 can walk along the length direction of the fully mechanized mining working face to cut the coal wall 200; in the walking process of cutting the coal wall 200 to form the above-mentioned notch, the first cutting device 2 needs to be arranged in front of the second cutting device 3, and the multiple drill bit groups 21 of the first cutting device 2 can rotate to form multiple cutting areas on the coal wall 200, and the diameters of the multiple cutting areas gradually decrease in the direction away from the second cutting device 3, that is, ... The head group 21 is arranged in a gradually tapered shape from front to back; therefore, during the coal cutting process of the self-notching machine 100, the notch formed on the coal wall 200 by the drill group 21 on the front side is relatively small. As the self-notching machine 100 moves forward, the notch formed on the coal wall 200 by the first cutting device 2 gradually increases, which can reduce the cutting resistance; at the same time, the cutting drum 32 of the second cutting device 3 on the rear side rotates to continue cutting the coal wall 200, and cuts through the coal wall 200 under the swing of the swing arm 31, which can expand the size of the notch so that the gap can be entered by the coal mining machine.

[0039] Optionally, the self-notching machine 100 can form a notch at the end of the comprehensive mining working face by cutting coal inward from the end of the comprehensive mining working face; the self-notching machine 100 can form a notch in the middle of the comprehensive mining working face by cutting coal in the middle position of the comprehensive mining working face.

[0040] Therefore, the coal mining machine can enter the coal wall 200 through the gap from the end or middle position of the fully mechanized mining working face to cut coal normally, so that the self-notching machine 100 can adapt to various mining methods of the fully mechanized mining working face.

[0041] It can be understood that the scraper conveyor 300 is the coal transportation equipment of the comprehensive mining working face. The scraper conveyor 300 is arranged on one side of the comprehensive mining working face and extends along the length direction of the comprehensive mining working face. A pin row is provided on the lower side of the coal mining machine, and a pin rail is provided on the scraper conveyor 300. The coal mining machine can move along the scraper conveyor 300 through the engagement of the pin row and the pin rail.

[0042] Optionally, the self-notching machine 100 of the embodiment of the present invention has the same walking principle as the coal mining machine, that is, Figure 1 As shown, a pin row is also provided on the lower side of the frame 1 of the self-notching machine 100 , which can engage with the pin rail on the scraper conveyor 300 , thereby driving the self-notching machine 100 to move along the scraper conveyor 300 .

[0043] In some embodiments, as Figure 3 and Figure 4As shown, the drill bit group 21 includes a rotating base 211 and multiple drill bits 212. The rotating base 211 is rotatably connected to the frame 1. The multiple drill bits 212 are evenly arranged along the circumference of the rotating base 211. The drill bits 212 are rotatably connected to the rotating base 211. The rotation axis of the drill bits 212 relative to the rotating base 211 is perpendicular to the rotation axis of the rotating base 211 relative to the frame 1.

[0044] Through the above settings, each drill bit 212 can rotate around its own axis so that the drill bit 212 can drill into the coal wall 200. At the same time, multiple drill bits 212 can rotate around the travel axis of the self-notching machine 100 along with the rotating seat 211 (wherein the travel axis of the self-notching machine 100 is consistent with the travel direction of the self-notching machine 100), thereby improving the cutting efficiency of the drill bit group 21.

[0045] Alternatively, as Figure 3 As shown, the drill bit assembly 21 includes a rotating base 211 and six drill bits 212 . The six drill bits 212 are evenly arranged along the circumference of the rotating base 211 .

[0046] As an example, Figure 3 and Figure 4 As shown, the rotating seat 211 is columnar, and its outer side includes multiple mounting surfaces 2111 for mounting drill bits 212. The mounting surfaces 2111 are plane and parallel to the axis of the rotating seat 211. The multiple mounting surfaces 2111 are evenly distributed along the circumference of the rotating seat 211, so that the outer contour of the cross section of the rotating seat 211 is polygonal; the drill bits 212 correspond to the mounting surfaces 2111 one by one, and the end faces of the drill bits 212 match the mounting surfaces 2111, so that the multiple drill bits 212 are stably mounted on the rotating seat 211.

[0047] In some embodiments, as Figure 4 and Figure 5 As shown, the drill bit 212 includes a tooth seat 2121 and a plurality of first cutting teeth 2122. The tooth seat 2121 is rotatably connected to the rotating seat 211. The tooth seat 2121 extends radially outward from the rotating seat 211. The cross-section of a part of the tooth seat 2121 away from the rotating seat 211 gradually decreases from the inside to the outside. The plurality of first cutting teeth 2122 are arranged in a spiral shape along the extension direction of the tooth seat 2121.

[0048] Through the above arrangement, multiple first cutting teeth 2122 are arranged in a spiral shape on the outer side of the tooth seat 2121 to form a drill bit 212. When the drill bit 212 rotates, the coal wall 200 is cut by the multiple first cutting teeth 2122, thereby forming a notch on the coal wall 200; in addition, since the end of the tooth seat 2121 away from the rotating seat 211 is conical, the multiple first cutting teeth 2122 are arranged in a conical spiral shape on the tooth seat 2121, which can reduce the resistance of the drill bit 212 to cutting the coal wall 200 and improve the cutting efficiency.

[0049] As an example, Figure 4 and Figure 5 As shown, the tooth seat 2121 includes a cylindrical first part 2121-1 and a conical second part 2121-2, and the first part 2121-1 and the second part 2121-2 are arranged in sequence in the direction away from the rotating seat 211 and are formed as one piece; the first cutting tooth 2122 is conical so as to cut the coal wall 200, and multiple first cutting teeth 2122 are arranged in a spiral shape along the axial direction of the tooth seat 2121, and the arrangement trajectory of the multiple first cutting teeth 2122 extends from one end of the tooth seat 2121 close to the rotating seat 211 to the end face of the tooth seat 2121 away from the rotating seat 211; therefore, the efficiency of cutting the coal wall 200 is higher when the drill bit 212 rotates along its own axis.

[0050] In some embodiments, as Figure 3 and Figure 6 As shown, the self-notching machine 100 also includes a transmission device, which includes a transmission shaft 4 and multiple transmission components 5. The transmission shaft 4 is rotatably connected to the frame 1, and multiple rotating seats 211 are all connected to the transmission shaft 4. The transmission components 5 correspond one-to-one to the rotating seats 211. The rotating seats 211 and the drill bit 212 are connected through the transmission component 5 so that the rotating seat 211 and the drill bit 212 rotate synchronously.

[0051] The transmission shaft 4 drives multiple rotating seats 211 to rotate, so that multiple drill bit groups 21 can rotate around the travel axis of the self-notching machine 100 to form notches on the coal wall 200; at the same time, when the rotating seat 211 rotates, the transmission assembly 5 can drive multiple drill bits 212 on the rotating seat 211 to rotate along its own axis, which is more conducive to the drill bits 212 drilling into the coal wall 200.

[0052] Optionally, the frame 1 is provided with a power component, such as a motor, for driving the transmission shaft 4 to rotate.

[0053] This is more conducive to achieving the rotation and control of the transmission shaft 4, and further achieving the rotation control of the multiple drill bit groups 21.

[0054] Of course, in other embodiments, if the space for arranging the self-notching machine 100 allows, the rotation of multiple drill bits 212 around the travel axis and the rotation of the drill bits 212 along their own axes can also be achieved using different power systems, for example, by arranging multiple motors.

[0055] In some embodiments, as Figure 2 and Figure 3 As shown, there are two first cutting devices 2 , and the two first cutting devices 2 are arranged oppositely on both sides of the second cutting device 3 .

[0056] The two first cutting devices 2 are arranged on both sides of the second cutting device 3, so that the self-notching machine 100 can adapt to different mining methods.

[0057] For example, when the comprehensive mining face adopts the dual coal mining method to mine coal, the comprehensive mining face is provided with a first coal mining machine and a second coal mining machine. When the first coal mining machine and the second coal mining machine run to the middle position of the comprehensive mining face, they both need to adopt an oblique cutting method to enter the coal wall 200, and then move from the middle position of the comprehensive mining face to the end to cut coal. Therefore, a self-opening gap is required to form a first gap for the first coal mining machine to enter the coal wall 200 and a second gap for the second coal mining machine to enter the coal wall 200 in the middle position of the comprehensive mining face.

[0058] Specifically, first move the self-notching machine 100 to the middle position of the comprehensive mining working face, control the self-notching machine 100 to move in the direction away from the first coal mining machine, and form a first notch on the coal wall 200. The first coal mining machine enters the coal wall 200 through the first notch, and then cuts the coal wall 200 from the middle position of the comprehensive mining working face in the direction away from the second coal mining machine; control the self-notching machine 100 to move in the direction away from the second coal mining machine, and form a second notch on the coal wall 200. The second coal mining machine enters the coal wall 200 through the second notch, and then cuts the coal wall 200 from the middle position of the comprehensive mining working face in the direction away from the first coal mining machine.

[0059] In some embodiments, as Figure 8 and Figure 9 As shown, the cutting drum 32 includes a drum body 321 and a plurality of second picks 322 . The drum body 321 is rotatably connected to the swing arm 31 . The second picks 322 are connected to the drum body 321 . The plurality of second picks 322 are spirally arranged along the axial direction of the drum body 321 .

[0060] As the self-notching machine 100 moves and cuts the coal wall 200, the multiple drill bit groups 21 gradually cut into the coal wall 200, and the size of the notch gradually increases. However, the notch is uneven and cannot form a notch for the coal shearer to enter. Through the above arrangement, under the action of the rotation of the cutting drum 32 and the swing of the swing arm 31, the multiple second cutting teeth 322 can cut through the coal wall 200, improve the uniformity of the notch shape, and expand the size of the notch vertically, so that the size of the notch matches the size of the coal shearer, allowing the coal shearer to enter the coal wall 200 through the notch and carry out normal coal cutting, thereby increasing the coal cutting speed of the coal shearer and the advancement speed of the fully mechanized mining working face.

[0061] In addition, by arranging the plurality of second cutting teeth 322 in a spiral shape, the cutting efficiency of the cutting drum 32 can be improved.

[0062] As an example, Figure 9As shown, the roller body 321 is cylindrical and is rotatably connected to the swing arm 31. The second cutting teeth 322 have the same shape as the first cutting teeth 2122. Multiple second cutting teeth 322 are arranged in a spiral shape along the axial direction of the roller body 321. The second cutting teeth 322 are distributed on the outer wall of the roller body 321 along the axial direction of the roller body 321.

[0063] In some embodiments, as Figure 2 As shown, the diameter of the cutting area formed by the drill bit group 21 arranged close to the second cutting device 3 is equal to the axial length of the drum body 321.

[0064] Through the above settings, in the process of notching by the notching machine 100, the drill bit group 21 away from the drum body 321 first cuts the coal wall 200 and forms a smaller notch, and multiple drill bit groups 21 gradually expand the depth of the notch. The drill bit group 21 close to the drum body 321 expands the depth of the notch to a preset depth, which is equal to the length of the drum body 321. The drum body 321 only needs to cut through the coal wall 200 at the notch, and there is no need to continue to expand the notch depth, thereby improving the cutting efficiency.

[0065] In some embodiments, as Figure 3 As shown, the second cutting device 3 also includes a swing driving member, which includes a cylinder 61 and a telescopic body 62. The cylinder 61 is hinged to the frame 1, and the telescopic body 62 is hinged to the swing arm 31. The telescopic body 62 is telescopically connected to the cylinder 61.

[0066] During the process of the cutting drum 32 cutting the coal wall 200, the swing arm 31 can be controlled to swing up and down through the swing drive component, thereby increasing the vertical size of the gap so that the vertical size of the gap matches the size of the coal mining machine, so that the coal mining machine can enter the coal wall 200 through the gap.

[0067] Optionally, the swing driving member is a jack 6 .

[0068] As an example, Figure 3 As shown, the swing arm 31 is rotatably connected to the frame 1 through a swing shaft. The swing arm 31 includes a first end 311 and a second end 312 respectively arranged on both sides of the swing shaft, and the cutting drum 32 is rotatably connected to the second end 312; the jack 6 is provided on the lower side of the swing shaft, the cylinder body 61 of the jack 6 is hinged to the frame 1, and the telescopic body 62 is hinged to the first end 311 of the swing shaft.

[0069] Thus, the swing arm 31 can be controlled to swing up and down by the jack 6 , with a swing angle of 90 degrees, and the coal wall 200 can be cut through by the cutting drum 32 .

[0070] Alternatively, as Figure 8As shown, there are two jacks 6 , namely a first jack and a second jack. The first jack and the second jack are arranged relatively on both sides of the swing arm 31 along the moving direction of the self-notching machine 100 .

[0071] Thus, the first jack can drive the swing arm 31 to swing 90 degrees from the vertical direction to one side, and the second jack can drive the swing arm 31 to swing 90 degrees from the vertical direction to the other side, that is, the swing angle of the swing arm 31 is 180 degrees, thereby improving the cutting efficiency of the second cutting device 3.

[0072] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to 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, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0073] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0074] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0075] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0076] In the present invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean 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 representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0077] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A self-notching machine, characterized in that: include: A frame having a walking portion for connecting to a scraper conveyor; a first cutting device, the first cutting device comprising a plurality of drill bit groups arranged in sequence along the travel direction of the frame, the drill bit groups being rotatably connected to the frame to form a circular cutting area, the rotation axis of the drill bit group relative to the frame being aligned with the travel direction of the frame; The second cutting device, the second cutting device and the first cutting device are arranged at intervals along the moving direction of the frame, the diameter of the cutting area formed by the multiple drill bit groups decreases successively in the direction away from the second cutting device, the second cutting device includes a swing arm and a cutting drum, the swing arm is swingably connected to the frame, the cutting drum is rotatably connected to the swing arm, the swing axis of the swing arm relative to the frame is perpendicular to the rotation axis of the drill bit group relative to the frame, and the rotation axis of the cutting drum relative to the swing arm is parallel to the swing axis of the swing arm relative to the frame.

2. The self-notching machine according to claim 1, characterized in that: The drill bit group includes a rotating seat and multiple drill bits, the rotating seat is rotatably connected to the frame, the multiple drill bits are evenly arranged along the circumference of the rotating seat, the drill bits are rotatably connected to the rotating seat, and the rotation axis of the drill bits relative to the rotating seat is perpendicular to the rotation axis of the rotating seat relative to the frame.

3. The self-notching machine according to claim 2, characterized in that: The drill bit includes a tooth seat and a plurality of first cutting teeth. The tooth seat is rotatably connected to the rotating seat. The tooth seat extends outward in the radial direction of the rotating seat. The cross-section of a part of the tooth seat away from the rotating seat gradually decreases from the inside to the outside. The plurality of first cutting teeth are arranged in a spiral shape along the extension direction of the tooth seat.

4. The self-notching machine according to claim 2, characterized in that: It also includes a transmission device, which includes a transmission shaft and multiple transmission components. The transmission shaft is rotatably connected to the frame, and multiple rotating seats are connected to the transmission shaft. The transmission components correspond to the rotating seats one by one. The rotating seats and the drill bit are connected through the transmission components so that the rotating seats and the drill bit rotate synchronously.

5. The self-notching machine according to any one of claims 1 to 4, characterized in that: There are two first cutting devices, and the two first cutting devices are arranged opposite to each other on both sides of the second cutting device.

6. The self-notching machine according to claim 1, characterized in that: The cutting drum includes a drum body and a plurality of second cutting teeth. The drum body is rotatably connected to the swing arm. The second cutting teeth are connected to the drum body. The plurality of second cutting teeth are spirally arranged along the axial direction of the drum body.

7. The self-notching machine according to claim 6, characterized in that: The diameter of the cutting area formed by the drill bit group arranged close to the second cutting device is equal to the axial length of the drum body.

8. The self-notching machine according to claim 1, characterized in that: The second cutting device further comprises a swing driving member, which comprises a cylinder body and a telescopic body. The cylinder body is hinged to the frame, the telescopic body is hinged to the swing arm, and the telescopic body is telescopically connected to the cylinder body.

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