Self-notching machine

Abstract

The invention discloses a self-notching machine. The self-notching machine comprises a rack, a first cutting device and a second cutting device, the rack is provided with a walking part used for being connected with the scraper conveyor. The first cutting device comprises a plurality of drill bit groups which are sequentially arranged in the walking direction of the rack, and the drill bit groups are rotatably connected with the rack to form a circular cutting area; the second cutting device and the first cutting device are arranged in a spaced mode, the diameter of a cutting area formed by the multiple drill bit sets is sequentially decreased in the direction away from the second cutting device, the second cutting device comprises a swing arm and a cutting roller, the swing arm is in swing connection with the rack, and the cutting roller is rotationally connected with the swing arm. According to the self-notching machine provided by the embodiment of the invention, the coal wall of the fully-mechanized coal mining face can be cut to form the notch for the coal mining machine to directly enter the coal wall, and the coal mining machine can enter the coal wall without adopting a beveling feed mode, so that the coal mining efficiency and the propelling speed of the fully-mechanized coal mining face are improved.

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] At present, when the coal mining machine is mining in the fully mechanized mining face, the coal mining machine body cannot directly enter the coal wall, and it needs to use the oblique cutting method to make the body enter the coal wall in order to cut coal normally. The oblique cutting of the coal mining machine includes the processes of body oblique cutting, body straightening, pushing and sliding, reverse cutting, empty knife clearing floating coal, etc. The processes are numerous and complicated, and the coal cutting speed of the coal mining machine is slow during the oblique cutting, which seriously affects the advancement speed of the fully mechanized 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, which 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 can enter the coal wall 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 comprehensive mining working face.

[0005] The self-notching machine of the embodiment of the present invention includes a frame, a first cutting device and a second cutting device; the frame has a walking part for connecting to a scraper conveyor; the first cutting device includes a plurality of drill bit groups arranged in sequence along the walking direction of the frame, the drill bit groups are rotatably connected to the frame to form a circular cutting area, and the rotation axis of the drill bit group relative to the frame is 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, and the diameter of the cutting area formed by the plurality of drill bit groups decreases in sequence in the direction away from the second cutting device, and the second cutting device includes a swing arm and a cutting drum, the swing arm is swingably connected to the frame, and 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.

[0006] In some embodiments, the drill bit group includes a rotating seat and a plurality of drill bits, the rotating seat is rotatably connected to the frame, the plurality of 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, wherein 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 portion of the tooth seat away from the rotating seat gradually decreases from inside to 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 meshed with the driving bevel gear, the driving bevel gear is connected to the transmission shaft, and the driven bevel gears correspond to and are connected to the drill bits one by one.

[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 picks, wherein the drum body is rotatably connected to the swing arm, the second picks are connected to the drum body, and the plurality of second picks are spirally arranged along the axial direction of the drum body.

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

[0014] In some embodiments, the second cutting device further comprises a swing driving member, wherein the swing driving member comprises 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 comprehensive mining working face to form a notch, and the coal mining machine can directly enter the coal wall through the notch to cut coal; in other words, the coal mining machine can enter the coal wall 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 comprehensive mining working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a top view schematic diagram of the relative position of a self-notching machine and a coal wall according to an 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 of a self-notching machine from another angle according to an embodiment of the present invention (the number of jacks in the figure is one).

[0019] Figure 4 It is a schematic structural 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 a transmission assembly of a 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 of one embodiment of the present invention (the number of jacks in the figure is two).

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

[0025] Reference numerals: 100. Self-notching machine; 1. Frame; 11. Traveling part; 2. first cutting device; 21. drill bit assembly; 211. rotating seat; 2111. mounting surface; 212. drill bit; 2121. tooth seat; 2121-1. first part; 2121-2. second part; 2122. first cutting tooth; 3. Second cutting device; 31. Swing arm; 311. First end; 312. Second end; 32. Cutting drum; 321. Drum body; 322. Second cutting tooth; 4. Transmission shaft; 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; 6. Jack; 61. Cylinder; 62. Telescopic body; 200, coal wall; 300. Scraper conveyor. DETAILED DESCRIPTION

[0026] 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.

[0027] 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 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, the diameter of the cutting area formed by the plurality of drill bit groups 21 decreases successively in the direction away from the second cutting device 3, the second cutting device 3 comprises a swing arm 31 and a cutting drum 32, the swing arm 31 is swingably connected to the frame 1, 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.

[0028] The self-notching machine 100 of the embodiment of the present invention is suitable for cutting the coal wall 200 of the comprehensive mining working face to form a notch, and the coal mining machine can directly enter the coal wall 200 through the notch 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 comprehensive mining working face.

[0029] The self-notching machine 100 of the embodiment of the present invention has a frame 1 connected to a 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 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 multiple drill bit groups 21 of the first cutting device 2 are arranged in front of the second cutting device 3. The head group 21 is arranged gradually in a tapered shape from front to back; therefore, during the process of cutting coal with the self-notching machine 100, the notch formed on the coal wall 200 by the drill bit group 21 on the front side is relatively small, and as the self-notching machine 100 moves forward, the notch formed on the coal wall 200 by the first cutting device 2 gradually increases, thereby reducing 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 the coal wall 200 is cut through under the swing of the swing arm 31, thereby expanding the notch size so that the notch can be entered by the coal mining machine.

[0030] 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.

[0031] Therefore, the coal mining machine can enter the coal wall 200 through the gap from the end or the middle position of the comprehensive mining working face to cut coal normally, so that the self-notching machine 100 can adapt to various mining methods of the comprehensive mining working face.

[0032] 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.

[0033] 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 , and the pin row 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 .

[0034] In some embodiments, Figure 3 and Figure 4As shown, the drill bit group 21 includes a rotating seat 211 and a plurality of drill bits 212. The rotating seat 211 is rotatably connected to the frame 1. The plurality of drill bits 212 are evenly arranged along the circumference of the rotating seat 211. The drill bits 212 are rotatably connected to the rotating seat 211. The rotation axis of the drill bits 212 relative to the rotating seat 211 is perpendicular to the rotation axis of the rotating seat 211 relative to the frame 1.

[0035] Through the above arrangement, 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 along the rotating seat 211 around the travel axis of the self-notching machine 100 (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.

[0036] Alternatively, if Figure 3 As shown, the drill bit assembly 21 includes a rotating seat 211 and six drill bits 212 , and the six drill bits 212 are evenly arranged along the circumference of the rotating seat 211 .

[0037] As an example, Figure 3 and Figure 4 As shown, the rotating seat 211 is columnar, and its outer side surface includes a plurality of mounting surfaces 2111 for mounting drill bits 212, the mounting surfaces 2111 are plane and parallel to the axis of the rotating seat 211, and the plurality of 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 one-to-one to the mounting surfaces 2111, and the end faces of the drill bits 212 match the mounting surfaces 2111, so that the plurality of drill bits 212 are stably mounted on the rotating seat 211.

[0038] In some embodiments, 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 portion 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.

[0039] Through the above arrangement, a plurality of first cutting teeth 2122 are spirally arranged 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 plurality of 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 plurality of first cutting teeth 2122 are arranged on the tooth seat 2121 in a conical spiral shape, which can reduce the resistance of the drill bit 212 in cutting the coal wall 200 and improve the cutting efficiency.

[0040] 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 integrally formed; the first cutting tooth 2122 is conical so as to cut the coal wall 200, and a plurality of 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 plurality of 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.

[0041] In some embodiments, 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 to the rotating seats 211 one by one. The rotating seats 211 and the drill bit 212 are connected by the transmission component 5 so that the rotating seats 211 and the drill bit 212 rotate synchronously.

[0042] 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 a notch 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 bit 212 drilling into the coal wall 200; thus, the rotation of the drill bit 212 along its own axis and the rotation of multiple drill bits 212 along the travel axis can be achieved through one power system, which saves more installation space.

[0043] Optionally, the frame 1 is provided with a power component, such as a motor, for driving the transmission shaft 4 to rotate.

[0044] This is more conducive to realizing the rotation and control of the transmission shaft 4 , and further realizing the rotation control of the multiple drill bit groups 21 .

[0045] 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.

[0046] In some embodiments, Figure 6As shown, the transmission assembly 5 includes a driving bevel gear 51 and a plurality of driven bevel gears 52 meshing with the driving bevel gear 51 , the driving bevel gear 51 is connected to the transmission shaft 4 , and the driven bevel gears 52 correspond to and are connected to the drill bit 212 one by one.

[0047] The transmission shaft 4 drives the rotating seat 211 to rotate, so that the multiple drill bits 212 can rotate around the travel axis of the self-notching machine 100; at the same time, the transmission shaft 4 drives the active bevel gear 51 to rotate, and through the engagement of the active bevel gear 51 and the driven bevel gear 52, the multiple driven bevel gears 52 are driven to rotate, so that the multiple drill bits 212 connected to the same rotating seat 211 can rotate around their own axes; thus, the rotation of the drill bit 212 in two directions can be achieved through only one power system, which saves more installation space.

[0048] Alternatively, if Figure 6 As shown, the diameter of the driving bevel gear 51 is greater than the diameter of the driven bevel gear 52 .

[0049] Therefore, the driving bevel gear 51 has a higher load-bearing capacity, and the power is transmitted to the plurality of driven bevel gears 52 via the driving bevel gear 51 , so that the stability of the power system can be improved.

[0050] As an example, Figure 6 As shown, the transmission shaft 4 is rotatably connected to the frame 1, and the rotating seat 211 and the active bevel gear 51 are both mounted on the transmission shaft 4 and rotate synchronously with the transmission shaft 4, so as to drive the multiple rotating seats 211 and the multiple active bevel gears 51 to rotate synchronously through the transmission shaft 4. There are six drill bits 212 on the rotating seat 211, and then there are six driven bevel gears 52 meshing on each active bevel gear 51. The driven bevel gears 52 correspond to and are connected with the drill bits 212 one by one. A driven shaft 521 is passed through the driven bevel gear 52, and the driven shaft 521 is rotatably connected to the rotating seat 211, so that the driven bevel gear 52 rotates stably relative to the rotating seat 211.

[0051] Thus, the transmission shaft 4 can drive multiple drill bit groups 21 to rotate around the travel axis. At the same time, the multiple drill bits 212 of the drill bit group 21 can rotate around their own axes to achieve the cutting of the coal wall 200, and then a gap for the coal mining machine to enter is formed on the coal wall 200 through the second cutting device 3, thereby improving the coal mining efficiency of the comprehensive mining working face.

[0052] In some embodiments, Figure 7 As shown, the transmission assembly 5 includes a worm wheel 53, a worm 54, a first bevel gear 55 and a second bevel gear 56. The worm wheel 53 is connected to the transmission shaft 4, the worm 54 is meshed with the worm wheel 53, the first bevel gear 55 and the worm 54 are coaxially arranged and rotate synchronously, the second bevel gear 56 is meshed with the first bevel gear 55, and the second bevel gear 56 is connected to the drill bit 212.

[0053] The transmission shaft 4 drives the rotating seat 211 to rotate, so that multiple drill bits 212 can be rotated around the travel axis of the self-notching machine 100; at the same time, the transmission shaft 4 transmits power to the worm gear 53, and the worm gear 53 engages with the worm 54, driving the worm 54 to rotate, and the first bevel gear 55 rotates accordingly and drives the second bevel gear 56 to rotate, so that the drill bit 212 can be rotated around its own axis; thus, the rotation of the drill bit 212 in two directions can be achieved by only one power system, which saves more space.

[0054] It is understandable that in the embodiment of the present invention, by optimizing the tooth profile of the worm wheel 53 and the worm 54, the self-locking property of the worm wheel 53 and the worm 54 structure can be released, and the worm 54 can be driven to rotate by the worm wheel 53, thereby realizing the rotation of the drill bit 212 around its own axis.

[0055] As an example, Figure 4 and Figure 7 As shown, the number of drill bits 212 is six, and the six drill bits 212 are evenly distributed along the circumference of the rotating seat 211; the rotating seat 211 and the worm gear 53 are both mounted on the transmission shaft 4 and rotate synchronously with the transmission shaft 4, the number of the worm 54, the first bevel gear 55 and the second bevel gear 56 are the same as the number of drill bits 212, the six worms 54 are evenly distributed along the circumference of the worm wheel 53 and are all meshed with the worm wheel 53, the worm 54 is rotatably connected to the rotating seat 211, the first bevel gear 55 is mounted on the shaft of the worm 54 and rotates synchronously with the worm 54, the second bevel gear 56 is meshed with the first bevel gear 55, and the second bevel gear 56 is connected to the drill bit 212 through the rotating shaft 561.

[0056] Thus, the transmission shaft 4 transmits power to the worm gear 53, and the worm gear 53 drives the multiple worms 54 to rotate simultaneously, thereby driving the first bevel gear 55 and the second bevel gear 56 to rotate in turn, thereby realizing the rotation of the drill bit 212 around its own axis.

[0057] It is understandable that those skilled in the art can make adaptive modifications to the positions and sizes of components such as the transmission shaft 4, the worm gear 53, the worm 54, the first bevel gear 55 and the second bevel gear 56 according to the installation space of the self-notching machine 100, so that the transmission system can operate normally, thereby realizing the rotation of the drill bit 212 in two directions through a power system.

[0058] In some embodiments, Figure 2 and Figure 3 As shown, there are two first cutting devices 2 , and the two first cutting devices 2 are arranged opposite to each other on both sides of the second cutting device 3 .

[0059] 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.

[0060] For example, when the comprehensive mining face adopts the double 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 walk 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.

[0061] 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 a 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 a direction away from the second coal mining machine; control the self-notching machine 100 to move in a 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 a direction away from the first coal mining machine.

[0062] In some embodiments, Figure 8 and Fig. 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 arranged in a spiral shape along the axial direction of the drum body 321 .

[0063] During the process of the self-notching machine 100 moving and cutting the coal wall 200, the multiple drill bit groups 21 gradually cut the coal wall 200, and the size of the notch gradually increases, but the notch is uneven and cannot form a notch for the coal mining machine to enter. Through the above settings, under 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 in the vertical direction, so that the size of the notch matches the size of the coal mining machine, so that the coal mining machine enters the coal wall 200 through the notch to cut coal normally, thereby improving the coal cutting speed of the coal mining machine and improving the advancement speed of the comprehensive mining working face.

[0064] 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.

[0065] As an example, Fig. 9As shown, the drum body 321 is cylindrical and 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 drum body 321. The second cutting teeth 322 cover the outer wall of the drum body 321 along the axial direction of the drum body 321.

[0066] In some embodiments, 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.

[0067] Through the above arrangement, in the process of notching by the notching machine 100, the drill bit group 21 far 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, and 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.

[0068] In some embodiments, Figure 3 As shown, the second cutting device 3 also includes a swing driving member, which includes a cylinder body 61 and a telescopic body 62. The cylinder body 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 body 61.

[0069] 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.

[0070] Optionally, the swing driving member is a jack 6 .

[0071] 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 arranged 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.

[0072] Thus, the swing arm 31 can be controlled to swing up and down by the jack 6, and the swing angle is 90 degrees, and the coal wall 200 can be cut through by the cutting drum 32.

[0073] Alternatively, if 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 .

[0074] 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.

[0075] In the description of the present invention, it is to 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”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, 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 limiting the present invention.

[0076] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0077] 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 one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0078] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0079] In the present invention, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. 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 described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0080] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary 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, and a rotation axis of the drill bit group relative to the frame being consistent with the travel direction of the frame; A second cutting device, wherein the second cutting device and the first cutting device are arranged at intervals along the moving direction of the frame, and the diameter of the cutting area formed by the plurality of drill bit groups decreases successively along the direction away from the second cutting device. The second cutting device comprises a swing arm and a cutting drum, wherein the swing arm is swingably connected to the frame, and the cutting drum is rotatably connected to the swing arm, and 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 a plurality of drill bits, the rotating seat is rotatably connected to the frame, the plurality of drill bits are evenly arranged along the circumference of the rotating seat, the drill bits are rotatably connected to the rotating seat, and a rotation axis of the drill bits relative to the rotating seat is perpendicular to a 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, wherein the tooth seat is rotatably connected to the rotating seat, the tooth seat extends radially outwardly along the rotating seat, the cross-section of a portion of the tooth seat away from the rotating seat gradually decreases from inside to outside, and 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 claim 4, characterized in that: 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 correspond to and are connected to the drill bits one by one.

6. The self-notching machine according to claim 4, characterized in that: 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.

7. The self-notching machine according to any one of claims 1 to 6, characterized in that: The number of the first cutting devices is two, and the two first cutting devices are arranged oppositely on both sides of the second cutting device.

8. The self-notching machine according to claim 1, characterized in that: The cutting drum comprises 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 arranged in a spiral shape along the axial direction of the drum body.

9. The self-notching machine according to claim 8, 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.

10. The self-notching machine according to claim 1, characterized in that: The second cutting device also includes a swing driving member, which includes 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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