Coal mine crusher

Abstract

The invention relates to the technical field of coal mine equipment, in particular to a coal mine crusher which is used for crushing coal briquettes and comprises a crusher body, a first motor, a second motor, a first rotating rod, a second rotating rod, two crushing rollers, a discharging box, a filter plate and a transmission assembly. The coal crusher has the beneficial effects that the first motor and the second motor which are arranged on the two sides respectively drive the corresponding first rotating rod, the second rotating rod and the crushing rollers, so that the two crushing rollers synchronously and reversely rotate, stable extrusion crushing force is formed on coal briquettes, and the crushing uniformity and efficiency are improved. The first motor gives consideration to crushing driving and power output of the transmission assembly, an additional power source does not need to be configured for screening, and energy consumption and manufacturing cost are reduced while the equipment structure is simplified. The filter plate can rotate to form a preset inclination angle, large coal briquettes are accurately guided to roll directionally, the problem that a traditional fixed filter plate is prone to accumulation and blockage is solved, and screening continuity is guaranteed. The power utilization rate and the equipment operation stability are improved, and the coal mine crushing treatment process is optimized.

Description

Technical Field

[0001] This invention relates to the field of coal mining equipment technology, and in particular to a coal mine crusher. Background Technology

[0002] The main purpose of a coal mine crusher is to crush large chunks of coal obtained from mining into uniformly sized coal fragments or coal powder. The working principle of a coal mine crusher is to apply squeezing and impact forces through a mechanical structure to overcome the internal binding forces of large coal chunks, crushing them into material forms that meet the requirements of subsequent processes. This significantly improves the convenience of coal storage, transportation efficiency, and adaptability to subsequent processing, providing crucial support for the smooth operation of the coal mining industry chain.

[0003] Most existing coal mine crushers still suffer from technical defects in practical applications: they struggle to achieve the desired crushing effect for large coal pieces, resulting in incomplete crushing. Larger coal chunks produced by incomplete crushing tend to accumulate in the screen area at the bottom of the crusher during their fall. As the accumulation increases, the screen openings gradually become clogged. This clogging not only prevents the efficient separation and discharge of qualified coal fragments or coal powder, but also significantly reduces the crusher's discharge efficiency, impacting the continuity of the entire coal processing flow, increasing energy consumption and maintenance costs, and hindering the improvement of the crusher's performance.

[0004] Therefore, there is an urgent need for a coal mine crusher to prevent large coal lumps from clogging the screen of the coal mine crusher. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides a coal mine crusher that solves the technical problem that the existing coal mine crushers produce large coal lumps, which easily clog the screen of the coal mine crusher.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0009] This invention provides a coal mine crusher for crushing coal blocks, comprising a crusher body, a first motor, a second motor, a first rotating rod, a second rotating rod, two crushing rollers, a discharge box, a filter plate, and a transmission assembly. The first motor and the second motor are respectively located on both sides of the crusher body. The output shafts of the first motor and the second motor are respectively connected to the first rotating rod and the second rotating rod, and the two crushing rollers are respectively sleeved on the first rotating rod and the second rotating rod. The two crushing rollers are arranged opposite each other and can rotate synchronously in opposite directions to crush coal blocks. The discharge box is connected to the bottom of the crusher body, and the filter plate extends horizontally and is rotatably connected inside the discharge box. The first motor is driven by the transmission assembly, which drives the filter plate to rotate to form a preset tilt angle, suitable for larger coal blocks to roll along the tilt direction of the filter plate.

[0010] Optionally, a first transmission wheel is provided on the output shaft of the first motor; the transmission assembly includes a third rotating rod, a second transmission wheel, and a drive plate; a connecting spring extending in the vertical direction is connected to one end of the filter plate near the third rotating rod; the first transmission wheel and the second transmission wheel are connected in a transmission manner, the second transmission wheel is fixed on the third rotating rod, the third rotating rod extending in the horizontal direction is rotatably connected to the bottom of the discharge box, one end of the drive plate extending in the vertical direction is fixed to one end of the third rotating rod near the filter plate, the first motor drives the third rotating rod to rotate, thereby driving the drive plate to move circumferentially around the axis of the third rotating rod, and then the drive plate periodically drives the filter plate to rotate to form a preset tilt angle.

[0011] Optionally, the coal mine crusher also includes a collection device, which is connected to the discharge box and is arranged in a stepped manner from top to bottom. The rotating filter plate is suitable for collecting the coal powder formed by the crushing of coal into the collection device.

[0012] Optionally, a third transmission wheel is provided on the output shaft of the second motor; the collecting device includes a collecting box, a fourth rotating rod, a fourth transmission wheel, a bevel gear set, a transmission shaft, fan blades, and multiple filter screens; the collecting box is connected to the discharge box, the third transmission wheel is connected to the fourth transmission wheel, the third transmission wheel is fixed on the fourth rotating rod, the fourth rotating rod is rotatably mounted on the collecting box at the end away from the transmission assembly, one bevel gear of the bevel gear set is fixed to the end of the fourth rotating rod near the collecting box, the other bevel gear of the bevel gear set is fixed to one end of the transmission shaft, the fan blades are connected to the other end of the transmission shaft, and multiple filter screens are evenly spaced in the collecting box, with the multiple filter screens and fan blades arranged opposite each other; the fourth rotating rod is driven to rotate by the second motor, thereby driving the fan blades to rotate to draw coal powder formed by crushing coal into the multiple filter screens.

[0013] Optionally, the collection device also includes a collection box disposed below the collection box, multiple collection holes opened on the collection box, and a collection frame located inside the collection box; each collection hole is located on the side of each filter screen near the filter plate, the collection box is connected to the collection box through multiple collection holes, the collection frame corresponds to the multiple collection holes, and the collection frame is detachably connected to the collection box.

[0014] Optionally, the collection device further includes a cleaning assembly for cleaning the filter screens. The cleaning assembly includes: a protective frame covering multiple filter screens; a third motor fixed to the collection box, with its output end connected to a disc; a transmission structure including a transmission rod, a connecting rod, and a drive rod, one end of which is connected to the disc, and the other end is rotatably connected to the drive rod via the connecting rod, for converting the rotational motion of the disc into bidirectional reciprocating motion of the drive rod perpendicular to the filter screen direction; a guide component including a sliding rod fixed to the protective frame and a slider slidably connected to the sliding rod, the slider being fixed above the drive rod for guiding the movement of the drive rod; and an impact component including multiple impact plates and multiple impact blocks, the impact plates being fixed to the drive rod and extending into the collection box through movable holes opened on the collection box, and the impact blocks being fixed to the impact plates near the filter screen end; the disc is driven to rotate by the third motor, and the drive rod is driven to reciprocate via the transmission structure, so that the impact plates periodically impact the filter screen along the direction perpendicular to the filter screen.

[0015] Optionally, the coal mine crusher also includes a feed port, two protective covers, two stabilizing frames, and two drive components. The two protective covers, two stabilizing frames, and two drive components are symmetrically arranged about the feed port. The drive components are driven to connect with the protective covers. The protective covers are adapted to the feed port. The two drive components can drive the two protective covers to move bidirectionally between the open position and the closed position, selectively opening or closing the feed port.

[0016] Optionally, the drive assembly includes a fourth motor, a threaded rod, a first moving block, a second moving block, and a guide rod; the fourth motor is fixed to the stabilizer and is driven by one end of the threaded rod, the other end of the threaded rod is fixed to the stabilizer, the first moving block is threadedly connected to the threaded rod, the guide rod is fixed to the side of the stabilizer away from the threaded rod, and the second moving block is slidably connected to the guide rod; the first and second moving blocks are symmetrically arranged about the protective cover and are both connected to the protective cover; the threaded rod is driven to rotate by the fourth motor, thereby causing the first moving block, the protective cover, and the second moving block to move bidirectionally along the axial direction of the threaded rod.

[0017] Optionally, the first movable block includes a first movable seat, a first connecting seat, and a first limiting rod. The first movable seat is threadedly connected to the threaded rod, the first connecting seat is fixedly connected to the side of the first movable seat near the protective cover, and the first limiting rod is fixedly connected to the side of the first movable seat near the protective cover, with the first limiting rod inserted into the protective cover. The second movable block includes a second movable seat, a second connecting seat, and a second limiting rod. The second movable seat is slidably connected to the smooth rod, the second connecting seat is fixedly connected to the side of the second movable seat near the protective cover, and the second limiting rod is fixedly connected to the side of the second movable seat near the protective cover, with the second limiting rod inserted into the protective cover.

[0018] Optionally, the protective cover is provided with a first limiting hole and a second limiting hole corresponding to the first limiting rod and the second limiting rod, and the first limiting hole and the second limiting hole are located on the same axis; the ends of the first limiting rod and the second limiting rod near the protective cover are each provided with a plurality of spring blocks in the circumferential direction, and the first limiting hole and the second limiting hole are each provided with a locking groove corresponding to the plurality of spring blocks.

[0019] (III) Beneficial Effects

[0020] The beneficial effects of this invention are as follows: This invention provides a coal mine crusher for crushing coal blocks, comprising a crusher body, a first motor, a second motor, a first rotating rod, a second rotating rod, two crushing rollers, a discharge box, a filter plate, and a transmission assembly. The first and second motors are respectively located on both sides of the crusher body. The output shafts of the first and second motors are respectively connected to the first and second rotating rods, and the two crushing rollers are respectively sleeved on the first and second rotating rods. The two crushing rollers are arranged opposite each other and can rotate synchronously in opposite directions to crush coal blocks. The discharge box is connected to the bottom of the crusher body, and the filter plate extends horizontally and is rotatably connected inside the discharge box. The first motor is driven by the transmission assembly, which drives the filter plate to rotate at a preset tilt angle, suitable for larger coal blocks to roll along the tilt direction of the filter plate. Compared to the prior art, the first and second motors arranged on both sides drive the corresponding first rotating rod, second rotating rod, and crushing rollers, ensuring that the two crushing rollers rotate synchronously in opposite directions, forming a stable crushing force on the coal blocks, and improving crushing uniformity and efficiency. The primary motor serves as both the crushing drive and transmission component power output, eliminating the need for an additional power source for screening. This simplifies the equipment structure while reducing energy consumption and manufacturing costs. The filter plate can rotate to form a preset tilt angle, precisely guiding larger coal blocks to roll in the correct direction. This avoids the problem of easy accumulation and clogging in traditional fixed filter plates, ensuring continuous screening. The overall design achieves coordinated operation of crushing and screening, improving power utilization and equipment operational stability, and optimizing the coal mine crushing process. Attached Figure Description

[0021] Figure 1 This is a sectional view of Embodiment 1 of the coal mine crusher of the present invention, taken along the vertical plane containing the axis of the first rotating rod.

[0022] Figure 2 for Figure 1 The image shows a partial sectional view of a coal mine crusher taken along the cross-section of the crushing rollers.

[0023] Figure 3 for Figure 1 The diagram shows a partial sectional view of the filter plate section, cut along the vertical plane containing the axis of the third rotating rod of the coal mine crusher.

[0024] Figure 4 for Figure 1 The diagram shows a partial sectional view of the third rotating rod of the coal mine crusher, taken along the vertical plane containing the axis of the third rotating rod.

[0025] Figure 5 for Figure 1 A side view of a coal mine crusher is shown.

[0026] Figure 6 for Figure 1 A partial cross-sectional view of the filter screen in the collecting device of the coal mine crusher, cut along the horizontal plane containing the axis of the fourth rotating rod.

[0027] Figure 7 for Figure 1 A partial sectional view of the collecting device in the coal mine crusher, taken along the vertical plane containing the center line of the filter screen in the left-right direction.

[0028] Figure 8 This is a partial cross-sectional view of the stabilizing frame section along the horizontal plane where the protective cover is located, in Embodiment 2 of the coal mine crusher of the present invention.

[0029] Figure 9 for Figure 8 A partial schematic diagram showing the location of the sector gear in a coal mine crusher.

[0030] Explanation of reference numerals in the attached figures

[0031] 1: Crusher body; 2: Support frame; 3: First motor; 31: First transmission wheel; 4: Second motor; 41: Third transmission wheel; 5: First rotating rod; 6: Second rotating rod; 7: Crushing roller; 8: Discharge box; 81: Collection seat; 9: Filter plate; 91: Rotating plate; 92: Rotating shaft;

[0032] 10: Transmission assembly; 101: Third rotating rod; 102: Second transmission wheel; 103: Drive plate;

[0033] 11: Connecting spring;

[0034] 12: Collection device; 121: Collection box; 122: Fourth rotating rod; 123: Fourth transmission wheel; 124: Bevel gear set; 125: Transmission shaft; 126: Fan blade; 127: Filter screen; 128: Collection box; 129: Collection hole; 130: Collection frame; 131: Protective frame; 132: Third motor; 133: Disc; 134: Transmission rod; 135: Connecting rod; 136: Sliding rod; 137: Movable hole; 138: Slider; 139: Drive rod; 140: Impact plate; 141: Impact block;

[0035] 15: Feed port; 16: Protective cover; 17: Stabilizer;

[0036] 18: Drive assembly; 181: Fourth motor; 182: Threaded rod; 183: First moving block; 184: Second moving block; 185: Spur rod; 186: Sector gear; 187: Rack seat;

[0037] 19: Spring catch block; 20: Locking groove. Detailed Implementation

[0038] To better explain and facilitate understanding of the present invention, a detailed description of the invention is provided below with reference to the accompanying drawings and specific embodiments. In this document, directional terms such as "upper," "lower," "left," "right," "front," and "rear" are used interchangeably. Figure 1 The orientation is used as a reference. Here, "up" refers to the direction away from the discharge box 8, "down" refers to the direction towards the discharge box 8, and "left" refers to the direction the person is facing. Figure 1 When facing left, "right" refers to the direction a person is facing. Figure 1 "To the right" refers to the direction to the right, while "front" refers to the direction perpendicular to the right. Figure 1 The inward direction of the cut plane, "back" refers to the direction perpendicular to the plane. Figure 1 The cutting plane faces outwards.

[0039] To better understand the above technical solutions, exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that the present invention can be understood more clearly and thoroughly, and that the scope of the present invention can be fully conveyed to those skilled in the art.

[0040] Example 1:

[0041] Reference Figures 1 to 7This embodiment proposes a coal mine crusher for crushing coal blocks and preventing large coal blocks from clogging the screen of the coal mine crusher. Specifically, the coal mine crusher in this embodiment includes a crusher body 1, two support frames 2, a first motor 3, a second motor 4, a first rotating rod 5, a second rotating rod 6, two crushing rollers 7, a discharge box 8, a filter plate 9, and a transmission assembly 10, which are described in detail below.

[0042] In this embodiment, support frames 2 are symmetrically arranged on both sides of the crusher body 1, and the two support frames 2 together support the crusher body 1 away from the bottom surface. The first motor 3 and the second motor 4 are fixed to the top of the support frame 2 by welding, screwing, or snap-fitting. The output shaft of the first motor 3 is connected to one end of the first rotating rod 5 through a coupling, and the other end of the first rotating rod 5 extends to the crusher body 1 and is rotatably connected to the crusher body 1. The output shaft of the second motor 4 is connected to one end of the second rotating rod 6 through a coupling, and the other end of the second rotating rod 6 extends to the crusher body 1 and is rotatably connected to the crusher body 1. The first rotating rod 5 and the second rotating rod 6 are arranged parallel to each other and at the same height from the ground. Two crushing rollers 7 are respectively sleeved on the first rotating rod 5 and the second rotating rod 6, and the two crushing rollers 7 are arranged opposite each other, achieving the crushing of coal by relative rotation.

[0043] The discharge box 8 is connected to the bottom of the crusher body 1. The filter plate 9 extends horizontally in its initial state and is rotatably connected inside the discharge box 8. Specifically, the filter plate 9 is a split type, including a rotating plate 91 and a rotating shaft 92. The rotating shaft 92 extends in the front-to-back direction and its two ends are fixed inside the discharge box 8 by welding, snap-fitting, or screwing. The middle part of the rotating plate 91 is sleeved on the rotating shaft 92, so that the rotating plate 91 can rotate around the rotating shaft 92 as the rotation axis. The first motor 3 is driven and connected to the transmission assembly 10. The transmission assembly 10 transmits power to the filter plate 9, causing the filter plate 9 to rotate around its rotating shaft 92 and form a preset tilt angle, which is adapted to the need for crushed coal blocks to roll along the tilt direction of the filter plate 9, realizing the screening of crushed coal blocks and the separation of larger coal blocks, and avoiding the accumulation and clogging on the surface of the filter plate 9. Furthermore, the right side of the discharge box 8 is connected to a collection seat 81. The collection seat 81 is connected to the end of the filter plate 9 away from the transmission component 10. Larger coal blocks can roll into the collection seat 81 along the inclined direction of the filter plate 9. At the same time, a storage basket is provided at the bottom of the collection seat 81. The storage basket and the collection seat 81 form a drawer structure, which can remove larger coal blocks from the collection seat 81.

[0044] The transmission assembly 10, in conjunction with the filter plate 9, causes the filter plate 9 to rotate periodically under the drive of the first motor 3. Here, "periodic rotation" means that the filter plate 9 rotates under the drive of the first motor 3, and then rotates in the reverse direction to reset. Each rotation and resetting of the filter plate 9 constitutes one periodic rotation. This ensures the continuity of the screening process and, through the creation of the tilt angle, promotes coal block movement, thereby improving screening efficiency and equipment operational stability.

[0045] In summary, the symmetrically arranged support frame 2 provides a stable installation foundation for the first motor 3. Combined with the transmission of the dual motors and the rotating rod, the two oppositely positioned crushing rollers 7 achieve synchronous reverse rotation, ensuring uniform and efficient coal crushing and improving crushing quality and stability. The transmission component 10 transmits power from the first motor 3 to the filter plate 9, driving it to rotate and form a preset tilt angle. The preset tilt angle refers to the range of angles formed between the filter plate 9 and its initial horizontal position after rotating around the rotation axis 92. Each time the filter plate 9 completes its rotation, it remains within this angle range, ensuring stable screening results. The preset tilt angle causes larger crushed coal pieces to roll and be screened along the tilt direction, effectively avoiding the coal blockage problem in traditional equipment. The rotatable design and power linkage mechanism of the filter plate 9 not only ensure the continuity of screening and separation but also reduce the equipment failure rate. Simultaneously, it simplifies the overall structure, improves operational reliability, and significantly optimizes the overall efficiency and user experience of coal mine crushing.

[0046] Furthermore, the output shaft of the first motor 3 is connected to the first transmission wheel 31 via a connection method such as sleeve or welding. The transmission assembly 10 includes a third rotating rod 101, a second transmission wheel 102, and a drive plate 103. The third rotating rod 101 extends horizontally and is rotatably connected to the lower part of the discharge box 8. Specifically, the third rotating rod 101 is rotatably connected to the discharge box 8 via a bearing. The second transmission wheel 102 is fixed to the third rotating rod 101 by welding or sleeve, and forms a transmission engagement with the first transmission wheel 31 through chain, belt, or gear meshing. The drive plate 103 is located inside the discharge box 8, more specifically, below the filter plate 9, and is not in contact with the filter plate 9 in the initial state. One end of the drive plate 103 is fixed to the end of the third rotating rod 101 near the filter plate 9 by welding, screwing, or snapping.

[0047] A connecting spring 11 extending vertically is connected to one end of the filter plate 9 near the third rotating rod 101. One end of the connecting spring 11 is fixed to the filter plate 9 by welding, snap-fitting, or screwing, and the other end is fixed to the inner wall of the discharge box 8 by welding, snap-fitting, or screwing. Specifically, the connecting spring 11 is connected to the end of the rotating plate 91 of the filter plate 9 away from the rotating shaft 92. Thus, when the rotating plate 91 rotates, the connecting spring 11 can convert the driving force of the driving plate 103 into the elastic potential energy of the connecting spring 11. Moreover, when the elastic potential energy of the connecting spring 11 reaches its maximum angle as the rotating plate 91 rotates, it is converted into a restoring force that drives the rotating plate 91 to reset. Under the action of the restoring force of the connecting spring 11, the rotating plate 91 rotates in the opposite direction, towards its initial position. Of course, the connecting spring 11 can also be connected to the bottom of the filter plate 9. To prevent the rotating plate 91 from exceeding its initial position when resetting, a limiting member should be provided near the filter plate 9, with the top of the limiting member abutting against the initial position of the rotating plate 91. During operation, after the first motor 3 starts, its output shaft drives the first transmission wheel 31 to rotate, which in turn drives the third rotating rod 101 to rotate synchronously through the transmission cooperation with the second transmission wheel 102. During the rotation of the third rotating rod 101, it drives the drive plate 103 to perform circular motion around its axis. When the drive plate 103 rotates to the top, it abuts against the end of the rotating plate 91 of the filter plate 9 away from the rotating shaft 92, pushing the rotating plate 91 to rotate clockwise around the rotating shaft 92. During its movement, the drive plate 103 periodically applies force to the filter plate 9, causing it to rotate around its rotating shaft 92 and form a preset tilt angle. After the filter plate 9 rotates, the connecting spring 11 undergoes axial stretching or compression deformation. Once the drive plate 103 disengages, the connecting spring 11 resets, driving the filter plate 9 back to its original position, thus achieving periodic rotation adjustment of the filter plate 9 and ensuring stable rolling of the coal block along the tilt direction.

[0048] Furthermore, the collecting device 12 and the discharge box 8 are arranged in a stepped manner along the vertical direction, forming a drop structure from top to bottom from the discharge box 8 to the collecting device 12.

[0049] During operation, the filter plate 9 rotates periodically under the drive of the transmission assembly 10. The coal powder generated after crushing changes with the tilt angle of the rotating plate 91 of the filter plate 9, detaches from the surface of the filter plate 9, and slides down the inner wall of the discharge box 8. With the help of the stepped drop and connecting structure between the collection device 12 and the discharge box 8, the coal powder flows naturally into the collection device 12 under the action of gravity, realizing the centralized collection of coal powder.

[0050] The stepped layout guides the directional movement of pulverized coal, and with the dynamic adjustment of the filter plate 9, it effectively prevents pulverized coal and coal lumps from accumulating in the discharge box 8. The centralized collection of pulverized coal can also prevent pulverized coal from escaping and polluting the air.

[0051] Furthermore, the collecting device 12 includes a collecting box 121, a fourth rotating rod 122, a fourth transmission wheel 123, a bevel gear set 124, a transmission shaft 125, a fan blade 126, and multiple filter screens 127. The collecting box 121 is connected to the discharge box 8, forming a coal powder flow channel. The output shaft of the second motor 4 is fitted with a third transmission wheel 41 by means of sleeve or welding. The fourth rotating rod 122 is rotatably mounted on one end of the collecting box 121 near the second motor 4. The fourth rotating rod 122 extends in the left-right direction and is parallel to the second rotating rod 6. One end of the fourth rotating rod 122 is located outside the collecting box 121 and is fixedly connected to the fourth transmission wheel 123 by means of welding or sleeve. The fourth transmission wheel 123 and the third transmission wheel 41 establish a transmission connection, for example, by means of chain, belt, or gear meshing. The other end of the fourth rotating rod 122 is located inside the collecting box 121 and is connected to the bevel gear set 124.

[0052] The bevel gear set 124 consists of two meshing bevel gears. One bevel gear is fixed to the other end of the fourth rotating rod 122 by welding or sleeve connection, and the other bevel gear is fixed to the drive shaft 125 by welding or sleeve connection. The meshing of the bevel gears changes the direction of power transmission. One end of the drive shaft 125 is rotatably connected to the collection box 12, and the drive shaft 125 is perpendicular to the fourth rotating rod 122. Specifically, the drive shaft 125 extends in the front-to-back direction. The fan blade 126 is fixedly connected to the other end of the drive shaft 125 and rotates synchronously with the drive shaft 125. Multiple filter screens 127 are evenly spaced along the internal space of the collection box 121, and the arrangement of the filter screens 127 corresponds to the fan blades 126, forming a coal powder filtration channel.

[0053] During operation, after the second motor 4 starts, its output shaft drives the third transmission wheel 41 to rotate. Through transmission cooperation with the fourth transmission wheel 123, it drives the fourth rotating rod 122 to rotate synchronously. During the rotation of the fourth rotating rod 122, it drives the bevel gear at its end to rotate. The bevel gear drives another bevel gear in the bevel gear set 124 and the transmission shaft 125 to rotate through meshing, thereby driving the fan blade 126 to rotate at high speed. The rotation of the fan blade 126 generates negative pressure suction, which draws the coal powder generated during the coal crushing process from the discharge box 8 into the collection box 121. When the drawn-in coal powder flows through multiple filter screens 127, it is intercepted and filtered by the filter screens 127, realizing the centralized collection and separation of coal powder and ensuring the integrity and cleanliness of the collected coal powder.

[0054] Furthermore, the collection device 12 also includes a collection box 128, multiple collection holes 129, and a collection frame 130. The collection box 128 is arranged below the collection box 121 and is positioned corresponding to the collection box 121. Multiple collection holes 129 are formed on the bottom wall of the collection box 121 and on the wall surface corresponding to the collection frame 130. The position of each collection hole 129 corresponds one-to-one with the side of each filter screen 127 near the filter plate 9. The collection box 128 forms a communication channel with the interior of the collection box 121 through the multiple collection holes 129.

[0055] The collection frame 130 is located inside the collection box 128, and its position corresponds to the multiple collection holes 129 to ensure that the coal powder falling from the collection holes 129 can fall accurately into the collection frame 130. At the same time, the collection frame 130 and the collection box 128 are detachably connected, which facilitates the subsequent cleaning and transfer of the collected coal powder.

[0056] During operation, the negative pressure suction generated by the rotating fan blades 126 draws coal dust from the discharge box 8 into the collection box 121. The coal dust then flows through multiple filter screens 127 and is intercepted by them. Under the influence of its own gravity and the airflow generated by the fan blades 126, the intercepted coal dust gradually accumulates on the side of the filter screen 127 closest to the filter plate 9. As the amount of coal dust accumulates, it slides down the surface of the filter screen 127 to the corresponding collection holes 129, and falls into the collection frame 130 inside the collection box 128 below. When a certain amount of coal dust has been collected in the collection frame 130, the collection frame 130 can be removed from the collection box 128, completing the centralized recovery and subsequent processing of the coal dust.

[0057] The structure ensures that coal dust falls and collects in a directional manner through the precise correspondence between the collection hole 129, the filter screen 127, and the collection frame 130, thus preventing coal dust from accumulating in the collection box 121. The detachable design of the collection frame 130 simplifies the coal dust removal process, improves the ease of use of the equipment, and further ensures the integrity and efficiency of coal dust collection.

[0058] The collection device 12 also includes a protective frame 131, a third motor 132, a disc 133, a transmission rod 134, a connecting rod 135, a sliding rod 136, multiple movable holes 137, multiple sliders 138, a drive rod 139, multiple impact plates 140, and multiple impact blocks 141. The protective frame 131 is installed above the collection box 121 by welding, screwing, or snap-fitting, and covers the outside of the multiple filters 127, forming a protective and support space. The third motor 132 is fixedly installed on the collection box 121 by welding, screwing, or snap-fitting. The output shaft of the third motor 132 extends vertically and is fixedly connected to the center of the disc 133 by welding, screwing, or snap-fitting, driving the disc 133 to rotate synchronously.

[0059] One end of the transmission rod 134 is connected to the radially outer side of the surface of the disc 133 away from the third motor 132, and the other end is rotatably connected to one end of the connecting rod 135; the other end of the connecting rod 135 is rotatably connected to one end of the drive rod 139, forming a linkage transmission structure. Multiple impact plates 140 are fixed to the side of the drive rod 139 near the filter screen 127, and the collection box 121 is near the side of the protective frame 131. That is, multiple movable holes 137 are opened on the top side of the collection box 121, each movable hole 137 corresponds to one impact plate 140, and the length of the movable hole 137 is adapted to the range of motion of the impact plate 140; the impact plate 140 extends into the interior of the collection box 121 through the movable hole 137 and is arranged adjacent to the multiple filter screens 127 respectively; the impact block 141 is fixed to the end of the impact plate 140 near the filter screen 127 by welding, screwing or snap-fitting.

[0060] The sliding rod 136 is fixed to the top of the protective frame 131 by welding, screwing, or snap-fitting. Multiple sliders 138 are slidably connected to the sliding rod 136, and the bottom end of the slider 138 is fixedly connected to the drive rod 139, guiding the movement of the drive rod 139. The directional relationships of the various components are as follows: the impact plate 140 is parallel to the filter screen 127 and the transmission rod 134; the disc 133 is parallel to the connecting rod 135, the sliding rod 136, and the drive rod 139; and the drive rod 139 is perpendicular to the impact plate 140.

[0061] During operation, after the third motor 132 starts, its output shaft drives the disc 133 to rotate around the center. During the rotation of the disc 133, the transmission rod 134 performs a circular motion. Since the transmission rod 134 and the connecting rod 135, as well as the connecting rod 135 and the drive rod 139, are rotatably connected, the circular motion of the transmission rod 134 is converted into the bidirectional reciprocating movement of the drive rod 139 along a direction perpendicular to the filter screen 127 through the connecting rod 135. At the same time, the slider 138 slides synchronously along the sliding rod 136 to ensure the smooth movement of the drive rod 139.

[0062] When the drive rod 139 moves in both directions, it drives multiple impact plates 140 and impact blocks 141 to move synchronously back and forth in a direction perpendicular to the filter screen 127. The impact plates 140 slide back and forth within the movable holes 137 to adapt to the movement range. During this process, the impact blocks 141 periodically approach and impact the surface of the filter screen 127, causing the filter screen 127 to vibrate. This causes the coal dust intercepted on its surface to be shaken off, ensuring that the filter screen 127 continues to filter efficiently and avoiding the impact of coal dust accumulation on the intake and collection efficiency.

[0063] Example 2:

[0064] Reference Figure 1 , Figure 5 , Figure 8 and Figure 9The difference between this embodiment and embodiment 1 is that this embodiment also includes a feeding port 15, two protective covers 16, two stabilizing frames 17 and two drive components 18, as detailed below.

[0065] In this embodiment, a feed port 15 is provided at the top of the crusher body 1 as a coal input channel. Two stabilizing frames 17 are symmetrically arranged relative to the feed port 15, providing an installation base for the drive assembly 18 and the protective cover 16. The two drive assemblies 18 are respectively mounted on the stabilizing frames 17 and establish a drive connection with the two protective covers 16 one by one. The structural contours of the two protective covers 16 are adapted to the edge shape of the feed port 15, and can completely cover or separate from the feed port 15 area.

[0066] The two protective covers 16, the two stabilizers 17, and the two drive components 18 are all mirror-distributed with the central axis of the feed port 15 as the center of symmetry, ensuring uniform protection and coverage of the feed port 15.

[0067] When coal needs to be fed into the crusher during operation, the drive assembly 18 starts and drives the protective cover 16 to move away from the feed port 15 until the protective cover 16 is completely removed from the feed port 15 area and is in the open position. At this time, the feed port 15 remains unobstructed, which facilitates the feeding of coal.

[0068] When the crusher is in crushing operation or when feeding needs to be stopped, the drive assembly 18 drives the protective cover 16 to move towards the feed port 15 in the opposite direction. The two protective covers 16 move towards each other synchronously along a symmetrical path until they are completely in contact with the edge of the feed port 15 and are in a closed position, thereby closing the feed port 15.

[0069] Through the bidirectional driving action of the drive assembly 18, the protective cover 16 can stably switch between the open and closed positions, ensuring smooth feeding and preventing external impurities from entering the crusher during operation. It also prevents coal dust generated during crushing from overflowing from the feed port 15, improving the cleanliness and safety of the equipment operation. The symmetrically arranged drive assembly 18 and protective cover 16 work together to ensure smooth and synchronous movement, avoiding deviation or jamming caused by unilateral force, thus enhancing the reliability of the structure's operation.

[0070] Furthermore, the drive assembly 18 includes a fourth motor 181, a threaded rod 182, a first moving block 183, a second moving block 184, and a guide rod 185. The fourth motor 181 is fixedly mounted on the stabilizer 17 by welding, screwing, or snap-fitting. Its output end is connected to one end of the threaded rod 182 via a coupling, and the other end of the threaded rod 182 is rotatably connected to the corresponding position on the stabilizer 17 via bearings, forming a stable support structure. The guide rod 185 is arranged parallel to the threaded rod 182 and fixedly mounted on the side of the stabilizer 17 away from the threaded rod 182, providing guiding support for the moving parts.

[0071] The first moving block 183 is threadedly connected to the threaded rod 182, allowing it to move axially along the rod as the threaded rod 182 rotates. The second moving block 184 is slidably connected to the smooth rod 185, allowing it to slide freely along the axial direction of the smooth rod 185. The first moving block 183 and the second moving block 184 are symmetrically distributed about the central axis of the protective cover 16, and both are fixedly connected to the protective cover 16, jointly providing the driving force and support for the movement of the protective cover 16.

[0072] During operation, after the fourth motor 181 starts, its output end drives the threaded rod 182 to rotate clockwise or counterclockwise around its own axis. Through the threaded transmission, the rotation of the threaded rod 182 is converted into the linear movement of the first moving block 183 along the axial direction of the threaded rod 182. Since the first moving block 183 is fixedly connected to the protective cover 16, the protective cover 16 moves synchronously with the first moving block 183, while simultaneously driving the second moving block 184 to slide synchronously along the smooth rod 185. The cooperation between the smooth rod 185 and the second moving block 184 serves as a guide and limiter, preventing the protective cover 16 from shifting or jamming during movement.

[0073] The threaded rod 182 is driven to rotate in both directions by the fourth motor 181, so that the first moving block 183, the protective cover 16 and the second moving block 184 can move bidirectionally along the axial direction of the threaded rod 182. This drives the protective cover 16 to switch stably between the open and closed positions, ensuring selective opening or closing of the feeding port 15, and guaranteeing ease of operation and structural stability.

[0074] Furthermore, the first movable block 183 includes a first movable seat, a first connecting seat, and a first limiting rod. The first movable seat is threadedly connected to the threaded rod 182 and can move axially as the threaded rod 182 rotates. The first connecting seat is fixedly assembled on the side of the first movable seat near the protective cover 16 by means of screwing, welding, or snap-fitting, forming a connection support with the protective cover 16. The first limiting rod is fixedly disposed on the side of the first movable seat near the protective cover 16 by means of screwing, welding, or snap-fitting, and its end is inserted into the interior of the protective cover 16 to form a fitting engagement with the protective cover 16.

[0075] The second movable block 184 includes a second movable seat, a second connecting seat, and a second limiting rod. The second movable seat is slidably connected to the smooth rod 185 and can slide freely along the axial direction of the smooth rod 185. The second connecting seat is fixedly assembled on the side of the second movable seat near the protective cover 16 by means of screwing, welding, or snap-fitting, and is symmetrically distributed with the first connecting seat to provide connection support for the protective cover 16. The second limiting rod is fixedly disposed on the side of the second movable seat near the protective cover 16, and its end is inserted into the interior of the protective cover 16. It is symmetrically distributed with the first limiting rod and also forms a fitting engagement with the protective cover 16.

[0076] During operation, the fourth motor 181 drives the threaded rod 182 to rotate, which in turn drives the first moving seat to move axially along the threaded rod 182 via threaded transmission. The first connecting seat moves synchronously with the first moving seat. At the same time, the first limiting rod moves synchronously with the protective cover 16 through its interlocking action. During this process, the protective cover 16 moves synchronously with the second moving seat through its connection with the second connecting seat. The second limiting rod moves synchronously with the second moving seat and helps to limit the movement trajectory of the protective cover 16 through its interlocking action.

[0077] The design of inserting the first and second limiting rods into the protective cover 16 enhances the connection strength between the moving block and the protective cover 16, preventing relative shaking or separation between the two. The symmetrical support of the first and second connecting seats further ensures that the protective cover 16 is subjected to balanced force during movement, effectively preventing deviation or jamming, and ensuring the stability and reliability of the protective cover 16 when switching between the open and closed positions.

[0078] Furthermore, the protective cover 16 has a first limiting hole and a second limiting hole inside, which correspond to the positions of the first limiting rod and the second limiting rod, respectively. The first limiting hole and the second limiting hole are arranged coaxially to provide a matching channel for the insertion of the limiting rod. Near the ends of the first and second limiting rods, multiple spring clips 19 are provided circumferentially on both the first and second limiting rods. The inner walls of the first and second limiting holes are provided with locking grooves 20 that are adapted to the spring clips 19. The limiting and fixing are achieved by the engagement of the spring clips 19 and the locking grooves 20. The spring clips 19 are the same as existing ball screws, consisting of a spring, a post head, and a housing. The post head faces the locking groove 20, and the housing is fixed to the first and second limiting rods by welding, snap-fitting, or bonding. When the spring clips 19 and the locking grooves 20 are aligned, they engage to achieve a temporary fixing effect. The locking grooves 20 are evenly arranged circumferentially along the inner walls of the first and second limiting holes.

[0079] The drive assembly 18 is equipped with a sector gear 186 and a rack seat 187, which are arranged in a corresponding manner: the sector gear 186 is fixed to the bottom end of the protective cover 16, and the rack seat 187 is fixed to the side of the stabilizer 17 near the sector gear 186. The rack seat 187 has meshing teeth on the side facing the sector gear 186, which can mesh with the teeth of the sector gear 186 for transmission.

[0080] When the protective cover 16 is in the open position, the fourth motor 181 drives the threaded rod 182 to rotate, and drives the first moving block 183 to move linearly along the axial direction of the threaded rod 182 through the threaded transmission. The first moving block 183 is connected to the protective cover 16 through the first connecting seat and the first limiting rod, and drives the protective cover 16 to move synchronously from the initial position toward the direction closer to the feeding port 15.

[0081] As the protective cover 16 moves, the sector gear 186 at its bottom gradually approaches the rack seat 187 until the teeth of the sector gear 186 mesh with the meshing teeth of the rack seat 187. At this time, the first moving block 183 continues to drive the protective cover 16 to move, and the rack seat 187 applies a lateral force to the sector gear 186 through the meshing action, forcing the sector gear 186 to drive one end of the protective cover 16 to rotate around the axis of the first limiting rod and the second limiting rod (the limiting rod is relatively stationary in the limiting hole, and the protective cover 16 rotates around it).

[0082] During the rotation of the protective cover 16, the locking groove 20 inside it rotates synchronously with the protective cover 16, and undergoes relative displacement with the spring block 19 on the limiting rod. When the protective cover 16 rotates to a preset angle, the spring block 19, under its own elastic action, engages in the corresponding locking groove 20, thereby positioning the rotation angle of the protective cover 16. At this time, the two protective covers 16 are symmetrically inclined and abut against each other, and their edges are in contact with the inclined surface of the feeding port 15, thus completing the closure of the feeding port 15.

[0083] When the protective cover 16 is in the closed position, the fourth motor 181 drives the threaded rod 182 to rotate in the opposite direction, which drives the first moving block 183 to move in a straight line in the opposite direction along the axial direction of the threaded rod 182, thereby pulling the protective cover 16 to move away from the feed port 15.

[0084] During the movement, the sector gear 186 and the rack seat 187 remain engaged. Under the action of the reverse pulling force, the sector gear 186 is driven by the reaction force of the meshing teeth of the rack seat 187 to rotate the protective cover 16 in the opposite direction and return to its original position around the axis of the first limiting rod and the second limiting rod. The spring block 19 disengages from the locking groove 20.

[0085] As the protective cover 16 continues to move, the sector gear 186 gradually moves away from the rack seat 187 until it is completely disengaged. The protective cover 16 stops rotating and continues to move in a straight line along with the first moving block 183 and the second moving block 184, eventually returning to the open position. The feeding port 15 is then unobstructed, completing the opening action.

[0086] Through the above-mentioned structural cooperation, the protective cover 16 achieves tight sealing and smooth opening of the feeding port 15 under the synergistic effect of linear movement and rotation. The positioning function of the spring block 19 and the locking groove 20 ensures the stability of the closed state. The meshing transmission of the sector gear 186 and the rack seat 187 ensures that the rotation process is precise and controllable, thereby improving the operational reliability of the protective cover 16 and the protective effect on the feeding port 15.

[0087] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0088] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0089] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," or "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," or "beneath" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0090] In the description of this specification, the terms "one embodiment," "some embodiments," "embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0091] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make modifications, alterations, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A coal mine crusher for crushing coal blocks, characterized in that: It includes the main body of the crusher (1), the first motor (3), the second motor (4), the first rotating rod (5), the second rotating rod (6), two crushing rollers (7), the discharge box (8), the filter plate (9), and the transmission assembly (10). The first motor (3) and the second motor (4) are respectively located on both sides of the crusher body (1); the output shafts of the first motor (3) and the second motor (4) are respectively connected to the first rotating rod (5) and the second rotating rod (6), and the two crushing rollers (7) are respectively sleeved on the first rotating rod (5) and the second rotating rod (6), and the two crushing rollers (7) are arranged opposite to each other and can rotate synchronously in opposite directions to crush coal blocks. The discharge box (8) is connected to the bottom of the crusher body (1), and the filter plate (9) extends in the horizontal direction and is rotatably connected to the inside of the discharge box (8). The first motor (3) is driven and connected to the transmission component (10). The transmission component (10) drives the filter plate (9) to rotate to form a preset tilt angle, which is suitable for larger coal blocks to roll along the tilt direction of the filter plate (9).

2. The coal mine crusher as described in claim 1, characterized in that: The first motor (3) has a first transmission wheel (31) on its output shaft. The transmission assembly (10) includes a third rotating rod (101), a second transmission wheel (102), and a drive plate (103). The filter plate (9) is connected to a connecting spring (11) that extends in the vertical direction near the end of the third rotating rod. The first transmission wheel (31) and the second transmission wheel (102) are connected by transmission. The second transmission wheel (102) is fixed on the third rotating rod. The third rotating rod, which extends horizontally, is rotatably connected to the bottom of the discharge box (8). One end of the drive plate (103), which extends vertically, is fixed to the end of the third rotating rod near the filter plate (9). The first motor (3) drives the third rotating rod (101) to rotate, thereby driving the drive plate (103) to move circumferentially around the third rotating rod (101) in the axial direction. Then, the drive plate (103) periodically drives the filter plate (9) to rotate to form a preset tilt angle.

3. The coal mine crusher as described in claim 2, characterized in that: The coal mine crusher also includes a collection device (12), which is connected to the discharge box (8). The collection device (12) and the discharge box (8) are arranged in a stepped manner from top to bottom. The filter plate (9) rotates to allow the coal powder formed by the crushing of coal to fall into the collection device (12).

4. The coal mine crusher as described in claim 3, characterized in that: The output shaft of the second motor (4) is equipped with a third transmission wheel (41). The collection device (12) includes a collection box (121), a fourth rotating rod (122), a fourth transmission wheel (123), a bevel gear set (124), a transmission shaft (125), a fan blade (126), and multiple filter screens (127). The collection box (121) is connected to the discharge box (8), the third transmission wheel (41) is connected to the fourth transmission wheel (123), the third transmission wheel (41) is fixed on the fourth rotating rod (122), the fourth rotating rod (122) is rotatably set on the end of the collection box (121) away from the transmission assembly (10), one bevel gear of the bevel gear set (124) is fixed on the end of the fourth rotating rod (122) near the collection box (121), the other bevel gear of the bevel gear set (124) is fixed on one end of the transmission shaft (125), the fan blade (126) is connected to the other end of the transmission shaft (125), and multiple filter screens (127) are evenly spaced in the collection box (121), and the multiple filter screens (127) are arranged opposite to the fan blade (126); The second motor (4) drives the fourth rotating rod (122) to rotate, thereby driving the fan blade (126) to rotate, which is suitable for sucking the coal powder formed by the crushing of coal into multiple filter screens (127).

5. The coal mine crusher as described in claim 4, characterized in that: The collection device (12) also includes a collection box (128) disposed below the collection box (121), a plurality of collection holes (129) opened on the collection box (121), and a collection frame (130) located inside the collection box (128). Each collection hole (129) is located on the side of each filter screen (127) near the filter plate (9). The collection box (128) is connected to the collection box (121) through multiple collection holes (129). The collection frame (130) corresponds to multiple collection holes (129) and is detachably connected to the collection box (128).

6. The coal mine crusher as described in claim 5, characterized in that: The collection device (12) also includes a cleaning assembly for cleaning the filter (127), the cleaning assembly comprising: A protective frame (131) is placed over multiple filters (127); The third motor (132) is fixed on the collection box (121), and its output end is connected to a disc (133). The transmission structure includes a transmission rod (134), a connecting rod (135), and a drive rod (139). One end of the transmission rod (134) is connected to the disk (133), and the other end is rotatably connected to the drive rod (139) through the connecting rod (135). It is used to convert the rotational motion of the disk (133) into the bidirectional reciprocating motion of the drive rod (139) in a direction perpendicular to the filter screen (127). The guide includes a sliding rod (136) fixed to the protective frame (131) and a slider (138) slidably connected to the sliding rod (136). The slider (138) is fixed above the drive rod and is used to guide the movement of the drive rod (139). The impact component includes multiple impact plates (140) and multiple impact blocks (141). The impact plates (140) are fixed to the drive rod (139) and extend into the collection box (121) through the movable hole (137) opened on the collection box (121). The impact blocks (141) are fixed to the end of the impact plates (140) near the filter screen (127). The disk (133) is driven to rotate by the third motor (132), and the drive rod (139) is driven to move back and forth through the transmission structure, so that the impact block (141) periodically impacts the filter screen (127) along the direction perpendicular to the filter screen (127) with the impact plate (140).

7. The coal mine crusher as described in claim 1, characterized in that: The coal mine crusher also includes a feed port (15), two protective covers (16), two stabilizers (17) and two drive components (18). The two protective covers (16), two stabilizers (17) and two drive components (18) are symmetrically arranged about the feed port (15). The drive components (18) are driven to connect with the protective covers (16). The protective covers (16) are adapted to the feed port (15). The two drive components (18) can drive the two protective covers (16) to move bidirectionally between the open position and the closed position, selectively opening or closing the feed port (15).

8. The coal mine crusher as described in claim 7, characterized in that: The drive assembly (18) includes a fourth motor (181), a threaded rod (182), a first moving block (183), a second moving block (184), and a guide rod (185). The fourth motor (181) is fixed to the stabilizer (17), and the fourth motor (181) is driven to one end of the threaded rod (182). The other end of the threaded rod (182) is fixed to the stabilizer (17). The first moving block (183) is threaded to the threaded rod (182). The smooth rod (185) is fixed to the side of the stabilizer (17) away from the threaded rod (182). The second moving block (184) is slidably connected to the smooth rod (185). The first moving block (183) and the second moving block (184) are symmetrically arranged about the protective cover (16) and are both connected to the protective cover (16). The threaded rod (182) is driven to rotate by the fourth motor (181), thereby causing the first moving block (183), the protective cover (16), and the second moving block (184) to move bidirectionally along the axial direction of the threaded rod (182).

9. The coal mine crusher as described in claim 8, characterized in that: The first movable block (183) includes a first movable seat, a first connecting seat and a first limiting rod. The first movable seat is threadedly connected to the threaded rod (182). The first connecting seat is fixedly connected to the side of the first movable seat near the protective cover (16). The first limiting rod is fixedly connected to the side of the first movable seat near the protective cover (16) and is inserted into the protective cover (16). The second movable block (184) includes a second movable seat, a second connecting seat, and a second limiting rod. The second movable seat is slidably connected to the light rod (185). The second connecting seat is fixedly connected to the side of the second movable seat near the protective cover (16). The second limiting rod is fixedly connected to the side of the second movable seat near the protective cover (16) and is inserted into the protective cover (16).

10. The coal mine crusher as described in claim 9, characterized in that: The protective cover (16) is provided with a first limiting hole and a second limiting hole corresponding to the first limiting rod and the second limiting rod, and the first limiting hole and the second limiting hole are located on the same axis; Multiple spring clips (19) are provided circumferentially at the ends of the first and second limiting rods near the protective cover (16), and locking grooves (20) corresponding to the multiple spring clips (19) are provided in the first and second limiting holes.

Images