An ultra-long working face coal mining machine for coal mining

Abstract

The application relates to the technical field of coal mining equipment, in particular to a super-long working face coal mining machine for coal mining, which comprises a hollow rotating arm, a cutting drum is arranged at the left end of the front side of the hollow rotating arm, a spiral cutting plate is welded on the circumferential surface of the cutting drum, a clamping assembly comprises a rotating ring, an arc-shaped pressing plate, a gear one, an annular gear and a rotating part which are arranged in a cutting tooth seat, the annular gear is arranged in a avoiding arc groove, the annular gear is sleeved on the outer circumferential surface of the rotating ring, and a preset interval is formed between the inner surface of the annular gear and the outer surface of the rotating ring, the rotating part drives the rotating ring to rotate relative to the cutting tooth so that the gear one and the arc-shaped pressing plate rotate, and the arc-shaped pressing plate extends into or out of the rotating ring. The super-long working face coal mining machine for coal mining has the clamping assembly, the cutting tooth can be replaced conveniently, and the stability of coal mining is improved.

Description

Technical Field

[0001] This application relates to the field of coal mining equipment technology, and in particular to a coal mining machine for ultra-long working faces in coal mining. Background Technology

[0002] In coal mining operations, cutting teeth are prone to wear and even breakage due to continuous and intense friction with the coal seam, requiring timely replacement to ensure mining efficiency. However, current cutting teeth and tooth holders are connected by pins and rubber sleeves, requiring specialized tools for pin installation and removal during assembly and disassembly. This cumbersome and labor-intensive process directly leads to low cutting tooth replacement efficiency, impacting overall coal mining efficiency. Summary of the Invention

[0003] This application provides a coal mining machine for ultra-long working faces in coal mines, which improves the stability of coal mining by setting up a clamping component to facilitate the replacement of cutting teeth.

[0004] The coal mining machine for ultra-long working faces in this application embodiment is characterized by comprising:

[0005] A hollow rotating arm is provided with a cutting drum on the front side of the left end of the hollow rotating arm. A spiral cutting plate is welded on the circumferential surface of the cutting drum. Notches are provided at equal intervals on the spiral cutting plate. A cutting tooth seat is provided in each notch. A cutting tooth is inserted into the cutting tooth seat. A clamping component is provided inside the cutting tooth seat. The clamping component is used to clamp the cutting tooth surface.

[0006] The clamping assembly includes a rotating ring, an arc-shaped pressure plate, a first gear, a ring gear, and a rotating component disposed within the cutting tooth holder. The rotating ring has an avoidance arc groove, the first gear is disposed within the avoidance arc groove, the ring gear is sleeved on the outer circumferential surface of the rotating ring, and there is a preset distance between the inner surface of the ring gear and the outer surface of the rotating ring, and the ring gear meshes with the first gear. The arc-shaped pressure plate is disposed on the first gear, and the rotating component is connected to the bottom of the rotating ring. The rotating component drives the rotating ring to rotate relative to the cutting tooth, so that the first gear and the arc-shaped pressure plate rotate, so that the arc-shaped pressure plate extends into or out of the rotating ring.

[0007] The coal mining machine for ultra-long working faces in this application improves the stability of coal mining by setting up a clamping assembly to facilitate the replacement of cutting teeth.

[0008] In some embodiments, a predetermined distance A is provided between the inner surface of the ring gear and the outer surface of the rotating ring, and 3cm≤A≤7cm.

[0009] The number of the avoidance arc grooves and gears is multiple, and the multiple avoidance arc grooves are spaced apart in the circumferential direction of the rotating ring. The multiple avoidance arc grooves and the multiple gears correspond one-to-one.

[0010] In some embodiments, each set of cutting tooth seats includes an arched frame welded to the circumferential surface of the cutting drum. The arched frame is inclined, and a tubular seat is fixedly fixed through the middle of the top of the arched frame. A blocking ring is fixedly installed at the top of the tubular seat. An annular groove is formed on the inner wall of the tubular seat, and a partition plate is fixedly installed on the inner wall of the tubular seat. The partition plate is located below the annular groove, and a collar is fixedly installed at the top of the partition plate.

[0011] In some embodiments, an arc-shaped groove is arrayed through the separator plate, the arc-shaped groove being located between the outer wall of the collar and the inner wall of the tubular seat, a limiting ring is fixedly installed on the inner wall of the tubular seat, the limiting ring being located below the separator plate, and an insertion hole is arrayed through the surface of the limiting ring.

[0012] In some embodiments, each set of cutting teeth includes a conical tooth, a connecting post is fixedly installed at the center of the bottom of the conical tooth, a disc is fixedly installed at the bottom end of the connecting post, the disc is inserted into the inside of the collar, and the top of the disc is flush with the top of the collar, the bottom end of the conical tooth fits against the top of the blocking ring and seals the opening of the blocking ring.

[0013] In some embodiments, the rotating component includes a slider and a rotating adjustment component. The rotating adjustment component includes a turntable fixedly installed at the bottom of the slider. A sleeve is fixedly installed at the center of the bottom of the turntable. Slide grooves are integrally formed on both sides of the sleeve. A slide rod is slidably connected inside the sleeve. A boss is fixedly installed on the circumferential surface of the top end of the slide rod. The boss is slidably connected to the slide groove. A tension spring is fixedly installed between the top end of the slide rod and the bottom of the turntable.

[0014] An adjustment disc is fixedly installed at the bottom of the slide rod. The adjustment disc is located below the limiting ring. A pin array is fixedly installed on the top of the adjustment disc. The pins are inserted into the insertion holes. The number of insertion holes is an integer multiple of the number of pins. A handle is fixedly installed at the bottom of the adjustment disc.

[0015] In some embodiments, a drive shaft is fixedly installed at the rear end of the cutting drum. The drive shaft is inserted into the front side of the left end of the hollow rotating arm. A rotation drive component is provided inside the hollow rotating arm to drive the drive shaft to rotate. A limit component is provided inside the hollow rotating arm to clamp the drive shaft surface.

[0016] Two annular flanges are fixedly installed on the circumferential surface of the front half of the drive shaft, and two protruding strips are fixedly installed on the circumferential surface of the rear half of the drive shaft.

[0017] The hollow rotating arm has a mounting hole on the front left side, the diameter of which is equal to the diameter of the annular flange. The hollow rotating arm has a protective shell integrally formed on the rear side. The hollow rotating arm has a refueling window on the top. The top of the hollow rotating arm is fixed with a cover plate by bolts, and the cover plate seals the opening of the refueling window.

[0018] In some embodiments, the rotation drive includes a motor fixedly installed inside a protective housing, a speed reducer fixedly installed at the output end of the motor, and a sprocket fixedly installed at the output end of the speed reducer;

[0019] An annular sleeve is fixedly installed on the inner wall of the rear side of the left end of the hollow rotating arm. A connecting ring is rotatably connected inside the annular sleeve. The connecting ring has an L-shaped cross-section. A second sprocket is fixedly installed on the front side of the connecting ring. A docking groove is opened through the center of the second sprocket. The first sprocket and the second sprocket are connected by a chain.

[0020] The drive shaft and the protrusion are inserted into the mating groove.

[0021] In some embodiments, the limiting component includes a left clamp and a right clamp, each of which has an arc-shaped surface on its opposite side. The left clamp and the right clamp are respectively attached to the circumferential surface of the front half of the drive shaft, and the two annular flanges are attached to the front and rear sides of the left clamp and the right clamp.

[0022] A straight rack is fixedly installed at the top and bottom of the left clamp, and an L-shaped rack is fixedly installed at the top and bottom of the right side of the right clamp. A gear two meshes between the straight rack and the L-shaped rack, and the gear two is rotatably connected to the inner wall of the hollow rotating arm.

[0023] A hydraulic cylinder is fixedly installed on the right side of the right clamp, and two guide rods are fixedly installed on the left side of the left clamp. A guide tube is sleeved on the outer side of the left end of the guide rod, and the guide tube is fixedly installed on the inner wall of the left end of the hollow rotating arm.

[0024] In some embodiments, an oil storage tank is fixedly installed on the inner wall of the hollow rotating arm. A sealing plate is provided on the top of the oil storage tank. The sealing plate is attached to the bottom of the cover plate. A guide pipe is connected to the bottom left side of the oil storage tank. The other end of the guide pipe is connected to the right side of the right clamp.

[0025] Both the left and right clamps have cavities inside. Each of the left and right clamps has a through hole on its opposite side, which communicates with the cavity. Both the left and right clamps have an array of cylindrical grooves on their arc-shaped surfaces, with rollers rotatably connected inside the cylindrical grooves. Both the left and right clamps have liquid guiding holes on their inner walls within the cavities, with each liquid guiding hole corresponding to a cylindrical groove. The cylindrical grooves communicate with the cavity through the liquid guiding holes.

[0026] A perforated plate is fixedly installed on the inner wall of each through hole. A crossbar is slidably connected to the center of the perforated plate. A conical sealing plug is fixedly installed on the end of the crossbar near the opening of the through hole. A spring is fixedly installed between the conical sealing plug and the perforated plate. An insert ring is fixedly installed on the inner wall of the opening of the through hole. The insert ring is adapted to the circumferential surface of the conical sealing plug, and the conical sealing plug is inserted through the insert ring. Attached Figure Description

[0027] To more clearly illustrate the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a three-dimensional structural diagram of a coal mining machine for ultra-long working faces in coal mines, according to an embodiment of the present invention.

[0029] Figure 2 This is a schematic diagram of the ring gear and rotating ring according to an embodiment of the present invention;

[0030] Figure 3 This is a three-dimensional structural diagram of the hollow rotating arm and the cutting drum of the coal mining machine for ultra-long working faces in a coal mine, according to an embodiment of the present invention.

[0031] Figure 4 This is a schematic diagram of the three-dimensional structure of the cutting drum according to an embodiment of the present invention;

[0032] Figure 5 This is a front cross-sectional view of the cutting tooth holder, cutting tooth, and clamping assembly according to an embodiment of the present invention.

[0033] Figure 6 This is a three-dimensional structural diagram of the clamping assembly and the cutting tooth holder in a separated state according to an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the three-dimensional cross-sectional structure of the cutting tooth holder according to an embodiment of the present invention;

[0035] Figure 8 This is a three-dimensional structural diagram of the clamping component according to an embodiment of the present invention;

[0036] Figure 9 This is a three-dimensional structural diagram of the rotation drive component according to an embodiment of the present invention;

[0037] Figure 10 This is a three-dimensional structural diagram of the limiting component according to an embodiment of the present invention;

[0038] Figure 11 This is a schematic diagram of the three-dimensional cross-sectional structure of the limiting component according to an embodiment of the present invention;

[0039] Figure 12 for Figure 11 A detailed, enlarged structural diagram of point A in the middle.

[0040] Hollow swing arm 100, mounting hole 101, protective shell 102, cover plate 103.

[0041] Cutting drum 200,

[0042] Spiral cutting plate 300, cutting tooth holder 400, arched frame 401, tubular seat 402, blocking ring 403, annular groove 404, dividing plate 405, collar 406, arc groove 407, limiting ring 408, insertion hole 409, cutting tooth 500, conical tooth 501, connecting post 502, insert plate 503, clamping assembly 600, rotating ring 601, clearance arc groove 602, arc pressure plate 603, gear 604, ring gear 605, slider 606, turntable 607, sleeve 608, sliding groove 609, sliding rod 610, boss 611, tension spring 612, adjusting plate 613, insertion post 614, handle 615, drive shaft 700, annular boss 701, 702, rotating drive component 800, motor 801, reducer 802, sprocket one 803, annular sleeve 804, connecting ring 805, sprocket two 806, mating groove 807, chain 808, limiting component 900, left clamp 901, right clamp 902, straight rack 903, L-shaped rack 904, gear two 905, hydraulic cylinder 906, guide rod 907, guide tube 908, oil reservoir 909, sealing plate 910, guide tube 911, cavity 912, through hole 913, roller 914, liquid guide hole 915, hollow plate 916, crossbar 917, conical sealing plug 918, spring 919, insert ring 920. Detailed Implementation

[0043] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this application.

[0044] It should be noted that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. The terms "installed," "connected," and "linked" should be interpreted broadly, for example, they can be fixed connections, detachable connections, or integral connections; they can be mechanical connections or electrical connections; they can be direct connections or indirect connections through an intermediate medium; they can be internal connections between two elements. The terms "parallel," "perpendicular," and "equal" include the described situation and situations similar to the described situation, the range of which is within an acceptable deviation range, wherein the acceptable deviation range is determined by those skilled in the art taking into account the measurement under discussion and the error associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where an acceptable deviation range for approximate parallelism can be, for example, within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where an acceptable deviation range for approximate perpendicularity can also be, for example, within 5°. "Equal" includes absolute equality and approximate equality, where an acceptable deviation range for approximate equality can be, for example, a difference between the two equal items being less than or equal to 5% of either one. Those skilled in the art will understand the specific meaning of the above terms in this application based on the specific circumstances.

[0045] To enable those skilled in the art to better understand the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] This application provides an example of an ultra-long working face coal mining machine, comprising:

[0047] A hollow rotating arm 100 is provided with a cutting drum 200 on the front side of the left end of the hollow rotating arm 100. A spiral cutting plate 300 is welded on the circumferential surface of the cutting drum 200. Notches are provided at equal intervals on the spiral cutting plate 300. A cutting tooth seat 400 is provided in each notch. A cutting tooth 500 is inserted into the cutting tooth seat 400. A clamping component 600 is provided inside the cutting tooth seat 400. The clamping component 600 is used to clamp the cutting tooth 500 on the surface.

[0048] The clamping assembly 600 includes a rotating ring 601, an arc-shaped pressure plate 603, a gear 604, a ring gear 605, and a rotating component disposed within the cutting tooth holder 400. The rotating ring 601 has an avoidance arc groove 602, the gear 604 is disposed within the avoidance arc groove 602, the ring gear 605 is sleeved on the outer circumferential surface of the rotating ring 601, and there is a preset distance between the inner surface of the ring gear 605 and the outer surface of the rotating ring 601, and the ring gear 605 meshes with the gear 604. The arc-shaped pressure plate 603 is disposed on the gear 604, and the rotating component is connected to the bottom of the rotating ring 601. The rotating component drives the rotating ring 601 to rotate relative to the cutting tooth 500, so that the gear 604 and the arc-shaped pressure plate 603 rotate, so that the arc-shaped pressure plate 603 extends into or out of the rotating ring 601.

[0049] A rotating ring 601 is disposed within the cutting tooth holder 400. An array of clearance arc grooves 602 are formed through the center of the rotating ring 601. Along a clockwise direction, an arc-shaped pressure plate 603 is rotatably connected between the top and bottom walls of the front end of each clearance arc groove 602. A gear 604 is fixedly mounted at the center of the front end of the arc-shaped pressure plate 603. A ring gear 605 is embedded within the cutting tooth holder 400, and the gear 604 meshes with the ring gear 605. Thus, when the rotating ring 601 rotates inside the tubular holder 402, the gear 604 rolls on the ring gear 605, thereby causing the arc-shaped pressure plate 603 to deflect relative to the rotating ring 601. The arc-shaped pressure plate 603 deflects to the upper side of the insert 503, thereby clamping the insert 503 through the cooperation of the arc-shaped pressure plate 603 and the separator 405, preventing the cutting tooth 500 from detaching from the tubular holder 402.

[0050] Furthermore, a preset distance exists between the inner surface of the ring gear 605 and the outer surface of the rotating ring 601. This prevents friction between the ring gear 605 and the rotating ring 601 when the rotating ring 601 is rotated, thus avoiding excessive contact. Simultaneously, it also prevents unstable meshing caused by excessive distance between the ring gear 605 and the rotating ring 601, thereby improving the stability and safety of the clamping and cutting teeth 500.

[0051] The coal mining machine for ultra-long working faces in this embodiment uses a clamping assembly 600 inside the cutting tooth holder 400 to prevent damage to the clamping assembly 600 during operation. Through the coordinated action of the rotating ring 601, the arc-shaped pressure plate 603, the gear 604, and the ring gear 605, the cutting teeth 500 are firmly clamped, preventing them from loosening or falling off during the cutting process, thereby ensuring the stability and reliability of the coal mining machine. The clamping assembly 600 also facilitates the replacement of the cutting teeth 500, improving the stability of coal mining.

[0052] In some embodiments, a preset distance A is provided between the inner surface of the ring gear 605 and the outer surface of the rotating ring 601, and 3cm≤A≤7cm.

[0053] There are multiple clearance grooves 602 and gears 604. Multiple clearance grooves 602 are spaced apart in the circumferential direction of the rotating ring 601, and multiple clearance grooves 602 and multiple gears 604 correspond one-to-one.

[0054] Specifically, such as Figures 1 to 12 As shown, there is a preset distance A between the inner surface of the ring gear 605 and the outer surface of the rotating ring 601, where 3cm ≤ A ≤ 7cm. A can be 3cm, thereby improving the meshing stability between the rotating ring 601 and the ring gear 605. A can be 7cm, thereby reducing the friction between the rotating ring 601 and the ring gear 605.

[0055] Meanwhile, there are multiple gears 604, which are spaced apart in the circumferential direction of the rotating ring 601. The gears 604 are rotatably mounted in the clearance arc groove 602 by a rotating shaft, so that the gears 604 can rotate relative to the rotating ring 601. In turn, the gears 604 drive the arc-shaped pressure plates 603 to move closer to each other to clamp the cutting teeth 500, or the gears 604 drive the arc-shaped pressure plates 603 to move away from each other to facilitate the disassembly of the cutting teeth 500.

[0056] By setting multiple gears 604 and arc-shaped pressure plates 603 on the rotating ring 601, the clamping and release of the cutting teeth 500 are realized.

[0057] The coal mining machine for ultra-long working faces in this embodiment of the invention, by setting a preset distance A, avoids friction between the rotating ring 601 and the ring gear 605 caused by the ring gear 605 being too close. Simultaneously, it also avoids unstable meshing caused by the ring gear 605 and the rotating ring 601 being too far apart, thus improving the stability and safety of clamping the cutting teeth 500. By setting multiple gears 604, the stability of clamping and releasing the cutting teeth 500 can be further improved.

[0058] In some embodiments, each set of cutting tooth seats 400 includes an arched frame 401 welded to the circumferential surface of the cutting drum 200. The arched frame 401 is inclined. A tubular seat 402 is fixedly fixed through the middle of the top of the arched frame 401. A blocking ring 403 is fixedly installed at the top of the tubular seat 402. An annular groove 404 is opened on the inner wall of the tubular seat 402. An annular gear 605 is embedded in the annular groove 404. A partition plate 405 is fixedly installed on the inner wall of the tubular seat 402. The partition plate 405 is located below the annular groove 404. A collar 406 is fixedly installed on the top of the partition plate 405. A rotating ring 601 is sleeved on the outside of the collar 406.

[0059] Specifically, such as Figures 1 to 12As shown, the tubular seat 402 is perpendicular to the top of the arched frame 401, meaning the tubular seat 402 is also inclined. Each set of cutting teeth 500 includes a conical tooth 501. A connecting post 502 is fixedly installed at the center of the bottom of the conical tooth 501. A disc 503 is fixedly installed at the bottom end of the connecting post 502. The disc 503 is inserted into the inside of the collar 406, and the top of the disc 503 is flush with the top of the collar 406. The inner diameter of both the blocking ring 403 and the collar 406 is equal to the diameter of the disc 503. The bottom end of the conical tooth 501 fits against the top of the blocking ring 403, sealing the opening of the blocking ring 403, thereby improving the stability of the device operation.

[0060] Furthermore, an array of arc-shaped grooves 407 are provided through the partition plate 405. The arc-shaped grooves 407 are located between the outer wall of the collar 406 and the inner wall of the tubular seat 402. A limiting ring 408 is fixedly installed on the inner wall of the tubular seat 402. The limiting ring 408 is located below the partition plate 405. An array of insertion holes 409 are provided through the surface of the limiting ring 408.

[0061] In some embodiments, the rotating component includes a slider 606 and a rotating adjustment component. The rotating adjustment component includes a turntable 607 fixedly installed at the bottom of the slider 606. A sleeve 608 is fixedly installed at the center of the bottom of the turntable 607. Slide grooves 609 are integrally formed on both sides of the sleeve 608. A slide rod 610 is slidably connected inside the sleeve 608. A boss 611 is fixedly installed on the circumferential surface of the top end of the slide rod 610. The boss 611 is slidably connected to the slide groove 609. A tension spring 612 is fixedly installed between the top end of the slide rod 610 and the bottom of the turntable 607.

[0062] An adjustment disc 613 is fixedly installed at the bottom of the slide bar 610. The adjustment disc 613 is located below the limit ring 408. An array of pins 614 are fixedly installed on the top of the adjustment disc 613. The pins 614 are inserted into the sockets 409. The number of sockets 409 is an integer multiple of the number of pins 614. A handle 615 is fixedly installed at the bottom of the adjustment disc 613.

[0063] Specifically, such as Figures 1 to 12 As shown, the rotating adjustment component includes a turntable 607 installed at the bottom of the slider 606. The turntable 607 is attached to the bottom of the partition plate 405. A sleeve 608 is fixedly installed at the center of the bottom of the turntable 607. Slide grooves 609 are integrally formed on both sides of the sleeve 608. A slide rod 610 is slidably connected inside the sleeve 608. A boss 611 is fixedly installed on the circumferential surface of the top of the slide rod 610. The boss 611 is slidably connected to the slide groove 609. A tension spring 612 is fixedly installed between the top of the slide rod 610 and the bottom of the turntable 607. The tension of the tension spring 612 causes the slide rod 610 to have an upward tendency.

[0064] An adjusting disc 613 is fixedly installed at the bottom of the slide rod 610. The adjusting disc 613 is located below the limiting ring 408. An array of insert pins 614 are fixedly installed on the top of the adjusting disc 613. The insert pins 614 are inserted into the insertion holes 409. The number of insertion holes 409 is an integer multiple of the number of insert pins 614. A handle 615 is fixedly installed at the bottom of the adjusting disc 613. By pulling down the handle 615, the adjusting disc 613 moves down, and the insert pins 614 are pulled out from the insertion holes 409. At this time, the adjusting disc 613 can be rotated, and the protrusion 611 provided on the surface of the slide rod 610 drives the sleeve 608, the slide groove 609 and the turntable 607 to rotate, thereby driving the slider 606 to slide in the arc groove 407, and causing the rotating ring 601 to rotate inside the tubular seat 402. Then, release the handle 615. Under the tension of the tension spring 612, the adjusting disc 613 moves upward, and the insert 614 is inserted into the insertion hole 409, inhibiting the rotation of the adjusting disc 613. This moves the adjusting disc 613 and the handle 615 into the tubular seat 402, preventing the ore from impacting the adjusting disc 613 and the handle 615.

[0065] A gear 604 is fixedly mounted at the center of the front end of the arc-shaped pressure plate 603. An annular gear 605 is embedded in the annular groove 404, and the gear 604 meshes with the annular gear 605. Thus, when the rotating ring 601 rotates inside the tubular seat 402, the gear 604 rolls on the annular gear 605, thereby causing the arc-shaped pressure plate 603 to deflect relative to the rotating ring 601. The arc-shaped pressure plate 603 deflects to the upper side of the insert 503, thereby clamping the insert 503 through the cooperation of the arc-shaped pressure plate 603 and the partition plate 405, preventing the cutting teeth 500 from disengaging from inside the tubular seat 402.

[0066] In this embodiment of the invention, the ultra-long working face coal mining machine, by holding the handle 615 and pulling it downwards, causes the adjusting plate 613 to move down, disengaging the insert 614 from the insertion hole 409. Rotating the handle 615 then causes the adjusting plate 613 to rotate, which in turn drives the sleeve 608 and the slide groove 609 to rotate via the boss 611 on the slide rod 610. The turntable 607 rotates synchronously, and the slider 606 slides within the arc-shaped groove 407, causing the rotating ring 601 to rotate. Gear 604 rotates within the ring gear... The wheel 605 rolls and drives the arc-shaped pressure plate 603 to deflect away from the top of the insert plate 503, so that the cutting tooth 500 can be pulled out from the tubular seat 402. When installing the cutting tooth 500, insert the insert plate 503 into the collar 406, and then rotate the adjusting plate 613 in the opposite direction, so that the rotating ring 601 can be rotated in the opposite direction, and the arc-shaped pressure plate 603 deflects to the top of the insert plate 503 to limit the cutting tooth 500. This makes it easy to replace the cutting tooth 500.

[0067] In some embodiments, a drive shaft 700 is fixedly mounted on the rear end of the cutting drum 200. The drive shaft 700 is inserted into the front left side of the hollow rotating arm 100. A rotation drive component 800 is provided inside the hollow rotating arm 100. The rotation drive component 800 is used to drive the drive shaft 700 to rotate. A limit component 900 is provided inside the hollow rotating arm 100. The limit component 900 is used to clamp the surface of the drive shaft 700.

[0068] Two annular flanges 701 are fixedly installed on the circumferential surface of the front half of the drive shaft 700, and two protrusions 702 are fixedly installed on the circumferential surface of the rear half of the drive shaft 700.

[0069] A mounting hole 101 is provided on the front side of the left end of the hollow swing arm 100. The diameter of the mounting hole 101 is equal to the diameter of the annular flange 701. A protective shell 102 is integrally formed on the rear side of the hollow swing arm 100. An oil filling window is provided on the top of the hollow swing arm 100. A cover plate 103 is fixed to the top of the hollow swing arm 100 by bolts. The cover plate 103 seals the opening of the oil filling window.

[0070] In some embodiments, the rotation drive 800 includes a motor 801 fixedly installed inside the protective housing 102, a reducer 802 fixedly installed at the output end of the motor 801, and a sprocket 803 fixedly installed at the output end of the reducer 802.

[0071] A ring sleeve 804 is fixedly installed on the inner wall of the rear side of the left end of the hollow rotating arm 100. A connecting ring 805 is rotatably connected inside the ring sleeve 804. The cross-section of the connecting ring 805 is L-shaped. A second sprocket 806 is fixedly installed on the front side of the connecting ring 805. A docking groove 807 is opened through the center of the second sprocket 806. The first sprocket 803 and the second sprocket 806 are connected by a chain 808.

[0072] The drive shaft 700 and the protrusion 702 are inserted into the mating groove 807.

[0073] Furthermore, the limiting assembly 900 includes a left clamp 901 and a right clamp 902. Both the left clamp 901 and the right clamp 902 have arc-shaped surfaces on opposite sides. The left clamp 901 and the right clamp 902 are respectively attached to the circumferential surface of the front half of the drive shaft 700. Two annular flanges 701 are attached to the front and rear sides of the left clamp 901 and the right clamp 902.

[0074] A straight rack 903 is fixedly installed at the top and bottom of the left clamp 901, and an L-shaped rack 904 is fixedly installed at the top and bottom of the right side of the right clamp 902. A gear 905 meshes between the straight rack 903 and the L-shaped rack 904, and the gear 905 is rotatably connected to the inner wall of the hollow rotating arm 100.

[0075] A hydraulic cylinder 906 is fixedly installed on the right side of the right clamp 902, and two guide rods 907 are fixedly installed on the left side of the left clamp 901. A guide tube 908 is sleeved on the outer side of the left end of the guide rod 907, and the guide tube 908 is fixedly installed on the inner wall of the left end of the hollow rotating arm 100.

[0076] The coal mining machine for ultra-long working faces in this embodiment of the invention retracts at the output end of the hydraulic cylinder 906, causing the right clamp 902 to move to the right, which in turn causes the L-shaped rack 904 to move to the right, driving the gear 905 to rotate, which in turn causes the straight rack 903 and the left clamp 901 to move to the left. By moving the left clamp 901 and the right clamp 902 away from each other and avoiding the annular flange 701, the drive shaft 700 can be pulled out from the hollow rotating arm 100, and the cutting drum 200 can be disassembled. This achieves the purpose of facilitating the disassembly of the cutting drum 200. Furthermore, by removing the cutting drum 200 from the hollow rotating arm 100, the cutting teeth 500 on the cutting drum 200 can be easily replaced.

[0077] Furthermore, an oil storage tank 909 is fixedly installed on the inner wall of the hollow swing arm 100. A sealing plate 910 is provided on the top of the oil storage tank 909. The sealing plate 910 is attached to the bottom of the cover plate 103. A guide pipe 911 is connected to the bottom left side of the oil storage tank 909. The other end of the guide pipe 911 is connected to the right side of the right clamp 902.

[0078] Both the left clamp 901 and the right clamp 902 have cavities 912 inside. Both the left clamp 901 and the right clamp 902 have through holes 913 on opposite sides, which communicate with the cavities 912. Both the left clamp 901 and the right clamp 902 have cylindrical grooves arranged in an array on their arc surfaces, and rollers 914 are rotatably connected in the cylindrical grooves. Both the left clamp 901 and the right clamp 902 have liquid guiding holes 915 on the inner walls of the cavities 912. The liquid guiding holes 915 correspond one-to-one with the cylindrical grooves, and the cylindrical grooves communicate with the cavities 912 through the liquid guiding holes 915.

[0079] A perforated plate 916 is fixedly installed on the inner wall of each through hole 913. A crossbar 917 is slidably connected at the center of the perforated plate 916. A conical sealing plug 918 is fixedly installed on the end of the crossbar 917 near the opening of the through hole 913. A spring 919 is fixedly installed between the conical sealing plug 918 and the perforated plate 916. An insert ring 920 is fixedly installed on the inner wall of the opening of the through hole 913. The insert ring 920 is adapted to the circumferential surface of the conical sealing plug 918, and the conical sealing plug 918 is inserted through the insert ring 920.

[0080] In this embodiment of the coal mining machine for ultra-long working faces, when the output end of the hydraulic cylinder 906 extends, causing the left clamp 901 and right clamp 902 to adhere to the surface of the drive shaft 700, the annular flange 701 is limited, ensuring the drive shaft 700 is stably connected to the hollow rotating arm 100. The roller 914 adheres to the surface of the drive shaft 700. During the rotation of the drive shaft 700, the friction between the drive shaft 700 and the roller 914 drives the roller 914 to rotate. The lubricating oil inside the cavity 912 is transferred to the surface of the drive shaft 700 through the roller 914, lubricating the drive shaft 700 and reducing the friction between the drive shaft 700 and the left and right clamps 901 and 902. This achieves the purpose of automatically lubricating the drive shaft 700.

[0081] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the method and core ideas of this application. It should be noted that those skilled in the art can make several improvements and modifications to this application without departing from the principles of this application, and these improvements and modifications also fall within the protection scope of the claims of this application.

Claims

1. A coal mining machine for ultra-long working faces in coal mining, characterized in that, include: A hollow rotating arm is provided with a cutting drum on the front side of the left end of the hollow rotating arm. A spiral cutting plate is welded on the circumferential surface of the cutting drum. Notches are provided at equal intervals in the circumferential direction on the spiral cutting plate. Cutting tooth seats are provided in the notches. Cutting teeth are inserted into the cutting tooth seats. A clamping component is provided inside the cutting tooth seats. The clamping component is used to clamp the cutting tooth surface. The clamping assembly includes a rotating ring, an arc-shaped pressure plate, a first gear, a ring gear, and a rotating component disposed within the cutting tooth holder. The rotating ring has an avoidance arc groove, the first gear is disposed within the avoidance arc groove, the ring gear is sleeved on the outer circumferential surface of the rotating ring, and there is a preset distance between the inner surface of the ring gear and the outer surface of the rotating ring, and the ring gear meshes with the first gear. The arc-shaped pressure plate is disposed on the first gear, and the rotating component is connected to the bottom of the rotating ring. The rotating component drives the rotating ring to rotate relative to the cutting tooth so that the first gear and the arc-shaped pressure plate rotate, so that the arc-shaped pressure plate extends into or out of the rotating ring. Each set of cutting tooth holders includes an arched frame welded to the circumferential surface of the cutting drum. The arched frame is inclined, and a tubular seat is fixedly inserted through the middle of the top of the arched frame. A blocking ring is fixedly installed at the top of the tubular seat. An annular groove is formed on the inner wall of the tubular seat, and an annular gear is embedded in the annular groove. A partition plate is fixedly installed on the inner wall of the tubular seat. The partition plate is located below the annular groove. A collar is fixedly installed on the top of the partition plate, and a rotating ring is sleeved on the outside of the collar.

2. The coal mining machine for ultra-long working faces according to claim 1, characterized in that, There is a preset distance A between the inner surface of the ring gear and the outer surface of the rotating ring, and 3cm≤A≤7cm. The number of the avoidance arc grooves and gears is multiple, and the multiple avoidance arc grooves are spaced apart in the circumferential direction of the rotating ring. The multiple avoidance arc grooves and the multiple gears correspond one-to-one.

3. The coal mining machine for ultra-long working faces according to claim 1, characterized in that, The separator plate has an array of through arc-shaped grooves located between the outer wall of the collar and the inner wall of the tubular seat. A limiting ring is fixedly installed on the inner wall of the tubular seat, located below the separator plate. The surface of the limiting ring has an array of through holes.

4. The coal mining machine for ultra-long working faces according to claim 3, characterized in that, Each set of cutting teeth includes conical teeth, a connecting post is fixedly installed at the center of the bottom of the conical teeth, a disc is fixedly installed at the bottom of the connecting post, the disc is inserted into the inside of the collar, and the top of the disc is flush with the top of the collar. The bottom of the conical teeth fits against the top of the blocking ring and seals the opening of the blocking ring.

5. The coal mining machine for ultra-long working faces according to claim 4, characterized in that, The rotating component includes a slider and a rotation adjusting element, with the rotation adjusting element fixedly mounted on the bottom of the slider. The bottom of the rotating ring is fixed with sliders, each slider corresponding to an arc-shaped groove, and the sliders are slidably connected within the arc-shaped grooves. The rotating adjustment component includes a turntable fixedly installed at the bottom of the slider. The turntable is attached to the bottom of the partition plate. A sleeve is fixedly installed at the center of the bottom of the turntable. Slide grooves are integrally formed on both sides of the sleeve. A slide rod is slidably connected inside the sleeve. A boss is fixedly installed on the circumferential surface of the top of the slide rod. The boss is slidably connected to the slide groove. A tension spring is fixedly installed between the top of the slide rod and the bottom of the turntable. An adjustment disc is fixedly installed at the bottom of the slide rod. The adjustment disc is located below the limiting ring. A pin array is fixedly installed on the top of the adjustment disc. The pins are inserted into the insertion holes. The number of insertion holes is an integer multiple of the number of pins. A handle is fixedly installed at the bottom of the adjustment disc.

6. The coal mining machine for ultra-long working faces according to claim 5, characterized in that, A drive shaft is fixedly mounted at the rear end of the cutting drum. The drive shaft is inserted into the front left side of the hollow rotating arm. A rotation drive component is provided inside the hollow rotating arm to drive the drive shaft to rotate. A limit component is provided inside the hollow rotating arm to clamp the drive shaft surface. Two annular flanges are fixedly installed on the circumferential surface of the front half of the drive shaft, and two protruding strips are fixedly installed on the circumferential surface of the rear half of the drive shaft. The hollow rotating arm has a mounting hole on the front left side, the diameter of which is equal to the diameter of the annular flange. The hollow rotating arm has a protective shell integrally formed on the rear side. The hollow rotating arm has a refueling window on the top. The top of the hollow rotating arm is fixed with a cover plate by bolts, and the cover plate seals the opening of the refueling window.

7. The coal mining machine for ultra-long working faces according to claim 6, characterized in that, The rotation drive component includes a motor fixedly installed inside the protective housing, a reducer fixedly installed at the output end of the motor, and a sprocket fixedly installed at the output end of the reducer; An annular sleeve is fixedly installed on the inner wall of the rear side of the left end of the hollow rotating arm. A connecting ring is rotatably connected inside the annular sleeve. The connecting ring has an L-shaped cross-section. A second sprocket is fixedly installed on the front side of the connecting ring. A docking groove is opened through the center of the second sprocket. The first sprocket and the second sprocket are connected by a chain. The drive shaft and the protrusion are inserted into the mating groove.

8. The coal mining machine for ultra-long working faces according to claim 6, characterized in that, The limiting component includes a left clamp and a right clamp. The left clamp and the right clamp are provided with arc-shaped surfaces on opposite sides. The left clamp and the right clamp are respectively attached to the circumferential surface of the front half of the drive shaft. The two annular flanges are attached to the front and rear sides of the left clamp and the right clamp. A straight rack is fixedly installed at the top and bottom of the left clamp, and an L-shaped rack is fixedly installed at the top and bottom of the right side of the right clamp. A gear two meshes between the straight rack and the L-shaped rack, and the gear two is rotatably connected to the inner wall of the hollow rotating arm. A hydraulic cylinder is fixedly installed on the right side of the right clamp, and two guide rods are fixedly installed on the left side of the left clamp. A guide tube is sleeved on the outer side of the left end of the guide rod, and the guide tube is fixedly installed on the inner wall of the left end of the hollow rotating arm.

9. The coal mining machine for ultra-long working faces according to claim 8, characterized in that: An oil storage tank is fixedly installed on the inner wall of the hollow swing arm. A sealing plate is provided on the top of the oil storage tank and is attached to the bottom of the cover plate. A guide pipe is connected to the bottom left side of the oil storage tank, and the other end of the guide pipe is connected to the right side of the right clamp. Both the left and right clamps have cavities inside. Each of the left and right clamps has a through hole on its opposite side, which communicates with the cavity. Both the left and right clamps have an array of cylindrical grooves on their arc-shaped surfaces, with rollers rotatably connected inside the cylindrical grooves. Both the left and right clamps have liquid guiding holes on their inner walls within the cavities, with each liquid guiding hole corresponding to a cylindrical groove. The cylindrical grooves communicate with the cavity through the liquid guiding holes. A perforated plate is fixedly installed on the inner wall of each through hole. A crossbar is slidably connected to the center of the perforated plate. A conical sealing plug is fixedly installed on the end of the crossbar near the opening of the through hole. A spring is fixedly installed between the conical sealing plug and the perforated plate. An insert ring is fixedly installed on the inner wall of the opening of the through hole. The insert ring is adapted to the circumferential surface of the conical sealing plug, and the conical sealing plug is inserted through the insert ring.

Images