Portable coal mine underground crusher

Abstract

The portable coal mine underground crusher comprises a material collecting frame, the material collecting frame is provided with an upper end face opening, the upper end face of the material collecting frame is provided with an inclined edge, and the inner side wall, away from the opening, of the material collecting frame is provided with a crushing cavity; the upper end face of the bottom filter frame is fixedly connected with the material collecting frame, and a crushing chamber is formed; one end of the rotating shaft is connected into the crushing cavity of the material collecting frame in a penetrating mode, a six-edge end is arranged on the outer arc surface of the rotating shaft, internal threads are arranged on the two sides of the outer arc surface of the rotating shaft, a through hole is formed in the middle of the surface of one side of the limiting ring, and the limiting ring, the positioning ring and the circular base wheel form a detachable structure, so that the crushing assembly can be rapidly disassembled and assembled; the equipment maintenance and debugging time is greatly shortened, the coal mine underground operation environment is complex and changeable, the equipment can be conveniently and rapidly adjusted or transferred according to the requirements of different mining areas through the design, the portability of the equipment is remarkably enhanced, and the problem that operation is limited due to the fact that a traditional crusher is fixed in structure and difficult to move is effectively solved.

Description

Technical Field

[0001] The present application relates to the field of coal mine processing, and in particular to a portable underground coal mine crusher. Background Art

[0002] In the field of coal mining, the underground working environment is complex and changeable, which places strict demands on the performance and adaptability of the equipment. As a key equipment in the coal mining process, the performance of the underground crusher is directly related to the efficiency and quality of coal mining.

[0003] At present, although some new crushers have appeared on the market, such as double-toothed roller crushers and mobile rock crushers, there are still certain limitations. Double-toothed roller crushers are based on the principle of double-roller extrusion crushing. Although they perform stably in conventional coal processing, when faced with special coal with high humidity and high viscosity, it is easy for materials to stick to the roller teeth and accumulate to block the crushing chamber. Utility Model Content

[0004] The main purpose of this application is to provide a portable underground coal mine crusher, aiming to solve the technical problem of materials sticking to roller teeth and accumulating to block the crushing chamber.

[0005] In order to achieve the above-mentioned purpose, the present application provides a portable coal mine underground crusher, including an aggregate frame, a bottom filter frame, a rotating shaft, a limiting ring, a positioning ring, a circular base wheel and an oscillation assembly; wherein the aggregate frame has an upper end face opening, the upper end face of the aggregate frame is provided with an oblique tilting edge, the inner side wall of the aggregate frame away from the opening is provided with a crushing chamber, the upper end face of the bottom filter frame is fixedly connected to the aggregate frame to form a crushing chamber, one end of the rotating shaft passes through and is connected to the crushing chamber of the aggregate frame, the outer arc surface of the rotating shaft is provided with a hexagonal end, and the outer arc surface of the rotating shaft has two Both sides are provided with internal threads, and a through hole is opened in the middle of one side surface of the limiting ring, and the through hole of the inner arc surface of the limiting ring is provided with an external thread. The end face of one side of the positioning ring is sleeved on the outer arc surface of the rotating shaft, and the cross section of the circular base wheel and the positioning ring are in the same plane and sleeved on the surface of the rotating shaft. The crushing assembly is fixedly mounted on the hexagonal end of the rotating shaft surface, and the oscillation assembly is away from one side of the crushing assembly and connected to one end of the rotating shaft, wherein the outer side wall of the aggregate frame is conical structure connected to the bottom filter frame, and a gear is fixedly mounted on the edge of one side of the rotating shaft.

[0006] Optionally, the positioning ring includes a positioning protrusion and a base; wherein, a surface on one side of the positioning protrusion is an arc-shaped structure; and the base is connected to both sides of the outer arc surface of the positioning ring.

[0007] Optionally, a hole is provided on one side surface of the positioning protrusion, and the outer arc surface of the positioning protrusion is sleeved in the external thread of the through hole of the limiting ring, and the external thread of the limiting ring is threadedly connected to the internal thread of the rotating shaft.

[0008] Optionally, one side surface of the circular base wheel is in the same plane as the gear, there are two rotating shafts, one end of each of the two rotating shafts is connected to a gear, and the outer arc surface serrations of the two gears are meshed and connected with each other.

[0009] Optionally, the crushing assembly includes a crushing knife and a grinding knife; wherein, the middle part of one side surface of the crushing knife is connected to the outer arc surface of the rotating shaft, and the grinding knife is placed on one side of the crushing knife and connected to the surface of the rotating shaft.

[0010] Optionally, the outer arc surface of the crushing knife is provided with a toothed blade, and the toothed blade is placed inside the crushing chamber. The number of the crushing knives is two groups, and they are distributed in a mirror-symmetrical manner. The two groups of crushing knives are arranged crosswise along the axial direction of the rotating shaft, and the movement trajectories of the toothed blades are intertwined during the rotation of the rotating shaft.

[0011] Optionally, the crushing knife is connected and adapted to the gear, the outer arc surface of the grinding knife is provided with an arc tool, the outer arc surface of the grinding knife close to the arc tool is provided with a trapezoidal block knife, and the trapezoidal block knife is adapted to the tooth-shaped blade.

[0012] Optionally, the oscillation assembly includes a driving wheel, a sleeve and a pull plate shaft; wherein the driving wheel is connected to one end of the rotating shaft on one side; one side of the sleeve is fixedly mounted on the surface of the driving wheel; and the middle of the end face of the pull plate shaft is connected to the surface of the rotating shaft on the other side.

[0013] Optionally, a screw rod is connected through the outer arc surface of the sleeve, and nuts are threadedly connected to both sides of the screw rod close to the sleeve.

[0014] Optionally, one end of the screw rod close to the other side pull plate shaft is connected to a tension spring, and a cam is provided on the side of the rotating shaft close to the pull plate shaft, and one end of the tension spring is fixedly installed in one end face of the cam.

[0015] The embodiment of the present application proposes a portable underground coal mine crusher. The detachable structure composed of a limit ring, a positioning ring and a circular base wheel allows the crushing assembly to be quickly disassembled and installed, greatly shortening the equipment maintenance and debugging time. The underground coal mine operating environment is complex and changeable. This design facilitates the rapid adjustment or transfer of the equipment according to the needs of different mining areas, significantly enhancing the portability of the equipment and effectively solving the problem of limited operation of traditional crushers due to fixed structures and difficulty in moving. Through the dual crushing method of staggered cutting and fine grinding of the crushing assembly, coal materials of different hardness and humidity can be efficiently processed to ensure that the particle size of the crushed coal is uniform and meets the standards. At the same time, through the threaded connection of the limit ring and the positioning ring, the position of the crushing assembly can be flexibly adjusted to achieve precise control of the crushing force and effect to meet diverse production needs. The vibration generated by the oscillation component through mechanical transmission can effectively prevent the coal material from accumulating and clogging in the crushing chamber, ensuring the continuity of the crushing operation. After the vibration is transmitted to the bottom filter frame, the auxiliary bottom filter frame achieves efficient screening, prompting the coal particles that meet the particle size requirements to be discharged in time, reducing the generation of over-crushed materials, improving the utilization rate of coal resources, and reducing the difficulty of subsequent sorting and transportation links.

[0016] Additional aspects and advantages of the present invention will be given in part in the following description and will become apparent from the following description or learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 This is a diagram showing the overall three-dimensional structure of the aggregate frame in the embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of the disassembly structure of the rotating shaft connection in the embodiment of the present application;

[0020] Figure 3 This is a schematic diagram of the positioning ring structure in the embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the top view of the crushing assembly in the embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the partial structure of the oscillation component in the embodiment of the present application;

[0023] Figure 6This is a schematic diagram of the structure of the crushing knife and the grinding knife in the embodiment of this application.

[0024] Figure markings: 1. Aggregate frame; 101. Oblique edge; 102. Crushing chamber; 2. Bottom filter frame; 3. Rotating shaft; 301. Hexagonal end; 4. Limiting ring; 5. Positioning ring; 501. Positioning protrusion; 502. Base; 6. Circular base wheel; 7. Crushing assembly; 701. Crushing knife; 7011. Toothed blade; 702. Grinding knife; 7021. Arc-shaped tool; 7022. Trapezoidal block knife; 8. Oscillation assembly; 801. Driving wheel; 802. Sleeve; 803. Pull plate shaft; 804. Screw; 805. Nut; 806. Tension spring; 807. Cam; 9. Gear.

[0025] The realization of the objectives, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their 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 such features. In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Figure 1 This is a diagram showing the overall three-dimensional structure of the aggregate frame in the embodiment of this application. Figure 2 This is a schematic diagram of the disassembly structure of the rotating shaft connection in the embodiment of this application. Figure 3 This is a schematic diagram of the positioning ring structure in the embodiment of this application. Figure 4 This is a schematic diagram of the top view of the crushing assembly in the embodiment of this application. Figure 5 This is a schematic diagram of the local structure of the oscillation component in the embodiment of the present application. Figure 6 This is a schematic diagram of the structure of the crushing knife and the grinding knife in the embodiment of this application.

[0031] The present application provides a portable underground coal mine crusher. Figures 1 to 6 The portable underground coal mine crusher may include an aggregate frame 1, a bottom filter frame 2, a rotating shaft 3, a limit ring 4, a positioning ring 5, a circular base wheel 6, a crushing assembly 7, an oscillation assembly 8 and a gear 9.

[0032] The aggregate frame 1 has an upper end face opening, and the upper end face of the aggregate frame 1 is provided with an oblique tilting edge 101, and the inner side wall of the aggregate frame 1 away from the opening is provided with a crushing chamber 102; the upper end face of the bottom filter frame 2 is fixedly connected to the aggregate frame 1, and a crushing chamber 102 is formed; one end of the rotating shaft 3 is connected to the crushing chamber 102 of the aggregate frame 1, and the outer arc surface of the rotating shaft 3 is provided with a hexagonal end 301, and both sides of the outer arc surface of the rotating shaft 3 are provided with internal threads; a through hole is opened in the middle of the surface of one side of the limiting ring 4, and the inner surface of the limiting ring 4 is provided with a through hole. An external thread is provided in the through hole of the arc surface; one end face of the positioning ring 5 is sleeved on the outer arc surface of the rotating shaft 3; the cross section of the circular base wheel 6 is in the same plane as the positioning ring 5, and is sleeved on the surface of the rotating shaft 3; the crushing assembly 7 is fixedly mounted on the hexagonal end 301 on the surface of the rotating shaft 3; the oscillation assembly 8 is arranged on the side away from the crushing assembly 7 and is connected to one end of the rotating shaft 3, wherein the outer side wall of the aggregate frame 1 is a conical structure connected to the bottom filter frame 2, and a gear 9 is fixedly mounted on the edge of one side of the rotating shaft 3.

[0033] The upper end surface of the aggregate frame 1 is designed as an open structure, and its outer side wall is conical and connected to the bottom filter frame 2 to form a stable whole, which not only facilitates the collection of coal materials, but also effectively disperses the stress generated during equipment operation and improves the stability of the equipment.

[0034] One end of the rotating shaft 3 is connected to the crushing chamber 102 of the aggregate frame 1, and its outer arc surface is provided with a hexagonal end 301 for fixing the crushing assembly 7. The design of this hexagonal end 301 can ensure reliable torque transmission between the crushing assembly 7 and the rotating shaft 3, avoiding slipping during high-speed rotation. At the same time, both sides of the outer arc surface of the rotating shaft 3 are provided with internal threads for cooperating with the external threads of the limit ring 4 to achieve precise limiting of the positioning ring 5.

[0035] The positioning ring 5 is sleeved onto the outer curved surface of the rotating shaft 3. Its outer curved surface is connected to a base 502 on both sides. The positioning protrusion 501 on the base 502 has an arc-shaped surface and is provided with a hole. The outer curved surface of the positioning protrusion 501 is sleeved into the external thread of the through hole of the limiting ring 4. By rotating the limiting ring 4, its external thread can be threadedly connected with the internal thread of the rotating shaft 3, thereby achieving precise adjustment of the position of the positioning ring 5 on the rotating shaft 3. This adjustable positioning structure design can flexibly adjust the working position of the crushing assembly 7 according to different crushing requirements, improving the adaptability of the equipment.

[0036] The cross section of the circular base wheel 6 is in the same plane as the positioning ring 5 and is sleeved on the surface of the rotating shaft 3. One end of the two rotating shafts 3 is connected to a gear 9, and the outer arc serrations of the two gears 9 are meshed with each other. When one of the rotating shafts 3 rotates under the drive of an external power source, the meshing transmission of the gear 9 can drive the other rotating shaft 3 to rotate synchronously in the opposite direction, thereby providing power for the crushing operation.

[0037] In some embodiments, the positioning ring 5 may include a positioning protrusion 501 and a base 502; wherein, one side surface of the positioning protrusion 501 is an arc-shaped structure; the base 502 is connected to both sides of the outer arc surface of the positioning ring 5, and one side surface of the positioning protrusion 501 is provided with a hole, and the outer arc surface of the positioning protrusion 501 is sleeved in the external thread of the through hole of the limiting ring 4, and the external thread of the limiting ring 4 and the internal thread of the rotating shaft 3 are threadedly connected to each other; one side surface of the circular base wheel 6 and the gear 9 are in the same plane; the number of rotating shafts 3 is two, and one end of the two rotating shafts 3 is connected to a gear 9, and the outer arc surface serrations of the two gears 9 are meshed with each other.

[0038] In some embodiments, the crushing assembly 7 may include a crushing knife 701 and a grinding knife 702; wherein the middle portion of one side surface of the crushing knife 701 is connected to the outer arc surface of the rotating shaft 3; the grinding knife 702 is placed on one side of the crushing knife 701 and connected to the surface of the rotating shaft 3;

[0039] Furthermore, the outer arc surface of the crushing knife 701 is provided with a toothed blade 701, and the toothed blade 701 is placed inside the crushing chamber 102. The number of crushing knives 701 is two groups, and they are distributed in a mirror-symmetrical manner. The two groups of crushing knives 701 are arranged axially crosswise along the rotating shaft 3, and the movement trajectories of the toothed blades 701 are intertwined during the rotation of the rotating shaft 3. The crushing knife 701 is connected and adapted to the gear 9. The outer arc surface of the grinding knife 702 is provided with an arc tool 7021, and the outer arc surface of the grinding knife 702 close to the arc tool 7021 is provided with a trapezoidal block knife 7022, and the trapezoidal block knife 7022 is adapted to the toothed blade 7011.

[0040] Combine Figure 2 and Figure 3 The inner arc surface of the limiting ring 4 is provided with an external thread, which forms a thread pair with the internal thread of the outer arc surface of the rotating shaft 3. When the limiting ring 4 is rotated, it can move axially along the rotating shaft 3, and axial limitation is achieved by squeezing the positioning ring 5. The positioning ring 5 is sleeved on the external thread of the limiting ring 4 through the hole of the positioning protrusion 501, and the base 502 contacts the end face of the crushing assembly 7. When the limiting ring 4 is tightened, the positioning ring 5 is pressed between the crushing assembly 7 and the limiting ring 4 to prevent axial movement. The cross section of the circular base wheel 6 is coplanar with the positioning ring 5, and the hexagonal hole on its inner side cooperates with the hexagonal end 301 of the rotating shaft 3, transmitting torque while providing radial support to ensure the stability of the crushing assembly 7.

[0041] When it is necessary to adjust the position of the crushing assembly 7 or to perform equipment maintenance and disassembly, it is only necessary to loosen the limiting ring 4 and separate it from the internal thread of the rotating shaft 3 by rotating it. At the same time, the connection between the positioning ring 5 and the limiting ring 4 is also released, and the positioning ring 5 together with the crushing assembly 7 can be removed from the rotating shaft 3. The cross-section of the circular base wheel 6 is coplanar with the positioning ring 5 and is sleeved on the surface of the rotating shaft 3. Its function is to assist positioning. During the disassembly process, it can be easily disassembled together with the positioning ring 5. During installation, the positioning ring 5 and the circular base wheel 6 are sleeved on the rotating shaft 3. The double threaded connection between the limiting ring 4 and the rotating shaft 3 and the positioning ring 5 is used to realize the tightening and limiting of the positioning ring 5, ensuring that the position of the crushing assembly 7 is stable during operation and the position can be flexibly adjusted according to the crushing requirements.

[0042] For example Figure 4 and Figure 6As shown, the crushing assembly 7 is composed of a crushing knife 701 and a grinding knife 702, which cooperate with each other and, driven by the rotating shaft 3, perform fine processing on the coal material. The middle part of one side surface of the crushing knife 701 is fixedly connected to the outer arc surface of the rotating shaft 3, and its outer arc surface is provided with a toothed blade 7011, and there are two of them, which are mirror-symmetrically distributed and placed crosswise. When the rotating shaft 3 rotates under the drive of an external power source, the two rotating shafts 3 rotate synchronously in opposite directions through the meshing transmission of the gear 9, driving the crushing knife 701 to rotate at high speed. At this time, the toothed blade 7011 forms an interlaced cutting trajectory in the crushing chamber 102, and strongly shears and tears the coal material entering the crushing chamber 102, and preliminarily crushes large pieces of coal into smaller particles. This cross-placement design increases the contact area between the crushing knife 701 and the coal. At the same time, the interlaced cutting movement can generate greater crushing force, effectively improving the crushing efficiency.

[0043] The grinding blade 702 is placed on one side of the crushing blade 701 and is also connected to the surface of the rotating shaft 3. Its outer curved surface is equipped with a curved cutter 7021 and a trapezoidal block cutter 7022. The trapezoidal block cutter 7022 is compatible with the tooth-shaped blade edge 7011. After the crushing blade 701 completes the initial crushing, the smaller coal particles will continue to be affected by the grinding blade 702. The curved cutter 7021 squeezes and grinds the coal particles through its curved surface structure, while the trapezoidal block cutter 7022 uses its unique trapezoidal structure to cooperate with the tooth-shaped blade edge 7011 to further refine and shape the particles. The two work together to grind the coal particles to the required particle size standard, ensuring that the crushed coal meets the requirements of subsequent sorting, transportation, and other links.

[0044] In addition, the crushing assembly 7 is mounted on the hexagonal end 301 on the surface of the rotating shaft 3. This hexagonal end 301 structure can achieve reliable torque transmission between the crushing assembly 7 and the rotating shaft 3, ensuring that the crushing knife 701 and the grinding knife 702 remain stable during high-speed rotation, avoiding loosening or slipping, thereby ensuring the continuous and efficient implementation of the crushing operation.

[0045] In some embodiments, the oscillation assembly 8 may include a driving wheel 801, a sleeve 802, a pull plate shaft 803, a screw 804, a nut 805, a tension spring 806 and a cam 807; the driving wheel 801 is connected to one end of the rotating shaft 3 on one side; one side of the sleeve 802 is fixedly mounted on the surface of the driving wheel 801; the middle part of the end face of the pull plate shaft 803 is connected to the surface of the rotating shaft 3 on the other side; the outer arc surface of the sleeve 802 is penetrated by a screw 804, and both sides of the screw 804 close to the sleeve 802 are threadedly connected with nuts 805; one end of the screw 804 close to the pull plate shaft 803 on the other side is connected to a tension spring 806, and a cam 807 is provided on the side of the rotating shaft 3 close to the pull plate shaft 803, and one end of the tension spring 806 is fixedly mounted on one end face of the cam 807.

[0046] like Figure 1 、 Figure 4 and Figure 5 As shown, a drive wheel 801 is connected to the end of one side of the rotating shaft 3, a sleeve 802 is fixed to the surface of the drive wheel 801, and a screw 804 extends through the outer arc surface of the sleeve 802 and is fixed at both ends by nuts 805. One end of the screw 804 is connected to a tension spring 806, and the other end of the tension spring 806 is fixed to a cam 807 next to the other side of the rotating shaft 3. When the rotating shaft 3 rotates, the drive wheel 801 rotates accordingly, driving the sleeve 802 to rotate, which in turn causes the screw 804 to produce a circular motion.

[0047] Specifically, when screw 804 moves, tension spring 806 is pulled by it. Due to the changing profile of cam 807, tension spring 806 periodically expands and contracts. The expansion and contraction of tension spring 806 is transmitted to the entire oscillation assembly 8 through screw 804, causing oscillation assembly 8 to vibrate. This vibration prevents coal material from accumulating and clogging within crushing chamber 102, evenly distributing the material within the range of crushing assembly 7 and improving crushing efficiency. Furthermore, the vibration is transmitted to bottom filter frame 2, assisting in screening, prompting coal particles that meet the particle size requirements to pass through bottom filter frame 2 more quickly and avoid the retention of overcrushed or substandard material.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A portable underground coal mine crusher, characterized in that: include: An aggregate frame (1) has an upper end surface opening, the upper end surface of the aggregate frame (1) is provided with an oblique tilting edge (101), and an inner side wall of the aggregate frame (1) away from the opening is provided with a crushing chamber (102); A bottom filter frame (2), the upper end surface of which is fixedly connected to the aggregate frame (1) and forms a crushing chamber (102); A rotating shaft (3) has one end connected to the crushing chamber (102) of the aggregate frame (1), an outer arc surface of the rotating shaft (3) is provided with a hexagonal end (301), and both sides of the outer arc surface of the rotating shaft (3) are provided with internal threads; A limiting ring (4) is provided with a through hole in the middle of one side surface, and an external thread is provided in the through hole on the inner arc surface of the limiting ring (4); A positioning ring (5), one end surface of which is sleeved on the outer arc surface of the rotating shaft (3); A circular base wheel (6), the cross section of which is in the same plane as the positioning ring (5), and is sleeved on the surface of the rotating shaft (3); A crushing assembly (7) is fixedly mounted on the hexagonal end (301) of the surface of the rotating shaft (3); An oscillating assembly (8) is arranged on a side away from the crushing assembly (7) and connected to one end of the rotating shaft (3); The outer side wall of the aggregate frame (1) is in a conical structure and is connected to the bottom filter frame (2), and a gear (9) is fixedly mounted on one side edge of the rotating shaft (3).

2. The portable underground coal mine crusher according to claim 1, characterized in that: The positioning ring (5) comprises: A positioning protrusion (501) having a curved surface on one side; The base (502) is connected to both sides of the outer arc surface of the positioning ring (5).

3. The portable underground coal mine crusher according to claim 2, characterized in that: A hole is provided on one side surface of the positioning protrusion (501), and the outer arc surface of the positioning protrusion (501) is sleeved in the external thread of the through hole of the limiting ring (4), and the external thread of the limiting ring (4) is threadedly connected to the internal thread of the rotating shaft (3).

4. The portable underground coal mine crusher according to claim 1, characterized in that: One side surface of the circular base wheel (6) and the gear (9) are in the same plane, the number of the rotating shafts (3) is two, one end of each of the two rotating shafts (3) is connected to a gear (9), and the outer arc surface serrations of the two gears (9) are meshed and connected with each other.

5. The portable underground coal mine crusher according to claim 1, characterized in that: The crushing assembly (7) comprises: A crushing knife (701), the middle portion of one side surface of which is connected to the outer arc surface of the rotating shaft (3); The grinding knife (702) is placed on one side of the crushing knife (701) and connected to the surface of the rotating shaft (3).

6. The portable underground coal mine crusher according to claim 5, characterized in that: The outer arc surface of the crushing knife (701) is provided with a toothed blade (7011), and the toothed blade (7011) is placed inside the crushing chamber (102). The crushing knives (701) are provided in two groups and are distributed in a mirror-symmetrical manner. The two groups of crushing knives (701) are arranged crosswise along the axial direction of the rotating shaft (3), and the movement trajectories of the toothed blades (7011) are intertwined during the rotation of the rotating shaft (3).

7. The portable underground coal mine crusher according to claim 6, characterized in that: The crushing knife (701) is connected and adapted to the gear (9); the outer arc surface of the grinding knife (702) is provided with an arc-shaped knife (7021); the outer arc surface of the grinding knife (702) close to the arc-shaped knife (7021) is provided with a trapezoidal block knife (7022); the trapezoidal block knife (7022) is adapted to the tooth-shaped blade (7011).

8. The portable underground coal mine crusher according to claim 1, characterized in that: The oscillating component (8) comprises: A driving wheel (801) connected to one end of the rotating shaft (3) on one side; A sleeve (802), one side of which is fixedly mounted on the surface of the driving wheel (801); The middle portion of the end surface of the pull plate shaft (803) is connected to the surface of the rotating shaft (3) on the other side.

9. The portable underground coal mine crusher according to claim 8, characterized in that: A screw rod (804) is connected through the outer arc surface of the sleeve (802), and nuts (805) are threadedly connected on both sides of the screw rod (804) close to the sleeve (802).

10. The portable underground coal mine crusher according to claim 9, characterized in that: One end of the screw rod (804) close to the pull plate shaft (803) on the other side is connected to a tension spring (806), and a cam (807) is provided on the side of the rotating shaft (3) close to the pull plate shaft (803), and one end of the tension spring (806) is fixedly installed in one end face of the cam (807).

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