Coal mine screening device

Abstract

The coal mine screening device comprises a base, a transmission mechanism, a collecting box and a screen, the transmission mechanism comprises a motor, a rotating disc and a columnar transmission assembly, the motor is installed on the base and drives the rotating disc to rotate, the upper surface of the rotating disc is an inclined plane inclined relative to the horizontal plane, and the rotating axis of the rotating disc is vertically arranged; the lower end of the transmission assembly is installed on the upper surface of the rotating disc, the transmission assembly and the rotating axis of the rotating disc are arranged at intervals, the extending direction of the transmission assembly inclines relative to the vertical direction, the upper end of the transmission assembly is fixedly connected with the lower side of the collecting box, and the screen is installed on the collecting box. When the rotating disc rotates, the collecting box and the screen are driven to shake through the transmission assembly. According to the scheme, the transmission assembly drives the collecting box to shake at multiple angles, so that the coal mine in the screen is shaken up, the coal mine is effectively screened, uniform and stable coal mine screening is achieved, screen blockage and maintenance time are reduced, and screening efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coal mine screening, in particular to a coal mine screening device. Background Art

[0002] Coal screening equipment is an essential tool in the coal mining process. Its primary function is to sort mined coal by particle size and quality for subsequent processing, transportation, and sales. Screening equipment typically consists of a screen, a vibrating device, and a collection box. It separates the coal into particles of varying sizes through mechanical vibration or shaking. With the increasing demand for coal and advances in mining technology, coal screening equipment has become widely used in mines, coal processing plants, and other locations.

[0003] The existing screening devices still have some shortcomings. Most screening devices use single-direction vibration to screen, which can easily cause coal to accumulate on one side of the screen and prevent uniform screening, and the screen is easily clogged, affecting screening efficiency and accuracy.

[0004] For example, patent document CN217140724U discloses a coal screening device used in coal mining, including a screening barrel, a feed port provided on the top sidewall of the screening barrel, a carrier plate rotatably connected to the inside of the screening barrel, an adjustment rod fixedly connected to the axis of the carrier plate, an adjustment gear sleeved on the bottom end of the adjustment rod, and a rotating sleeve sleeved on the outer surface of the adjustment rod above the adjustment gear. The device uses a second motor to drive the adjustment gear to rotate, which drives the adjustment rod to rotate within the rotating sleeve, which drives the supporting plate to rotate, and the sieve holes inside the supporting plate engage with the sieve holes inside the screening plate to complete the sieve hole adjustment. The first motor drives the chain to rotate, which drives the power gear to rotate, which drives the rotating sleeve to rotate, which drives the screening plate to rotate, and the rotation of the screening plate causes the coal to be screened, and the screened coal is removed from the device through the screening port.

[0005] Therefore, a coal screening device that can screen coal evenly and stably is needed to improve screening efficiency. Utility Model Content

[0006] The utility model provides a coal screening device to achieve uniform and stable screening of coal, reduce screen blockage and maintenance time, and improve screening efficiency.

[0007] In order to achieve the above-mentioned purpose, the utility model provides a coal mine screening device, including a base, a transmission mechanism, a collection box and a screen, the transmission mechanism including a motor, a turntable and a columnar transmission assembly, the motor is installed on the base, the motor drives the turntable to rotate, the upper surface of the turntable is an inclined surface inclined relative to the horizontal plane, the rotation axis of the turntable is vertically arranged, the lower end of the transmission assembly is installed on the upper surface of the turntable, the transmission assembly and the rotation axis of the turntable are spaced apart, the extension direction of the transmission assembly is inclined relative to the vertical direction, the upper end of the transmission assembly is fixedly connected to the lower side of the collection box, and the screen is installed on the collection box; wherein, when the turntable rotates, the collection box and the screen are driven to shake by the transmission assembly.

[0008] Furthermore, the transmission assembly includes a connecting column and a sleeve, the connecting column is installed on the upper surface of the turntable and is perpendicular to the upper surface of the turntable, the sleeve is connected to the lower side of the collection box, and the sleeve is sleeved on the connecting column.

[0009] Furthermore, the transmission mechanism further comprises a connecting block, wherein the connecting block is fixedly connected to the upper end of the sleeve, and the connecting block is detachably connected to the lower side of the collection box via bolts.

[0010] Furthermore, the lower surface of the turntable has an annular limiting groove, the center line of the limiting groove is the rotation axis of the turntable, and the transmission mechanism also includes a vertically arranged limiting column, the upper end of the limiting column is inserted into the limiting groove.

[0011] Furthermore, the transmission mechanism also includes a fixed block and two fixed columns, the two fixed columns are fixed to the base, the two fixed columns are respectively located on opposite sides of the motor, the fixed block is fixed to the two fixed columns, the fixed block has an opening to avoid the rotating shaft of the motor, there are two limiting columns, and the two limiting columns are both installed on the fixed block.

[0012] Furthermore, the collecting box has a receiving cavity, the screen is removably installed in the receiving cavity, and the lower surface of the screen is spaced apart from the bottom wall of the receiving cavity.

[0013] Furthermore, a plurality of columns are fixedly connected to the lower surface of the screen, and the lower ends of the columns are supported on the bottom wall of the accommodating cavity.

[0014] Furthermore, the end of the screen has a grabbing groove.

[0015] Furthermore, there is a movable gap between the sleeve and the connecting column, a movable block is fixedly connected to the sleeve, a fixed rod is fixedly connected to the base, and the fixed rod and the movable block are movably connected.

[0016] Furthermore, the movable block has a groove, the upper part of the fixed rod is a limiting rod, the limiting rod is located in the groove of the movable block, and there is a movable gap between the inner wall of the groove and the limiting rod.

[0017] The invention provides a coal screening device comprising a base, a transmission mechanism, a collection box, and a screen. The transmission mechanism comprises a motor, a turntable, and a cylindrical transmission assembly. The motor is mounted on the base and drives the turntable to rotate. The upper surface of the turntable is an inclined surface inclined relative to the horizontal plane. The rotation axis of the turntable is vertically arranged. The lower end of the transmission assembly is mounted on the upper surface of the turntable. The transmission assembly and the rotation axis of the turntable are spaced apart. The extension direction of the transmission assembly is inclined relative to the vertical direction. The upper end of the transmission assembly is fixedly connected to the lower side of the collection box. The screen is mounted on the collection box. When the turntable rotates, the collection box and the screen are driven to shake by the transmission assembly. In this solution, the motor drives the turntable to rotate. Since the rotation axes of the transmission assembly and the turntable are spaced apart and the extension direction of the transmission assembly is inclined relative to the vertical direction, the transmission assembly drives the collection box to shake at multiple angles, so that the coal in the screen is shaken evenly, ensuring that coal that meets the standards is effectively screened into the collection box. This effectively screens the coal, thereby achieving uniform and stable screening of the coal, reducing screen blockage and maintenance time, and improving screening efficiency.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. When the utility model is in use, the motor drives the rotating shaft and the turntable, which drives the connecting column and the sleeve, so that the collection box is shaken at multiple angles with the connecting column as the center, so that the coal in the screen is shaken evenly, ensuring that the coal that meets the standards is effectively screened into the collection box, effectively screening the coal.

[0020] 2. When the utility model is in use, the connection between the limit groove at the bottom of the turntable and the limit column enables the turntable to rotate smoothly, ensuring the stability of the screening process.

[0021] 3. When the utility model is in use, the screen can be easily replaced through the grabbing slot, allowing coal to be screened according to different standards to meet diverse needs.

[0022] 4. When the utility model is in use, the collection box can be disassembled by bolts, which is convenient for replacement, cleaning and maintenance, ensuring convenience after long-term use. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0024] Figure 1 A schematic diagram of the structure of the coal mine screening device provided by the utility model;

[0025] Figure 2 Another view of the coal mine screening device provided by the utility model;

[0026] Figure 3 This is a schematic diagram of the structures of the collection box and sleeve in the coal mine screening device provided by the utility model;

[0027] Figure 4 This is a schematic diagram of the base and transmission mechanism of the coal mine screening device provided by the utility model;

[0028] Figure 5 A schematic diagram of a turntable and a connecting column in a coal mine screening device provided by the present invention;

[0029] Figure 6 This is a schematic diagram of the disassembly and assembly of the collection box and screen in the coal mine screening device provided by the utility model.

[0030] The above drawings include the following reference numerals:

[0031] 1. Base;

[0032] 2. Transmission mechanism;

[0033] 3. Collection box;

[0034] 4. Screen;

[0035] 5. Pillar;

[0036] 6. Grab slot;

[0037] 7. Fixed column;

[0038] 8. Fixed block;

[0039] 9. Limit column;

[0040] 10. Fixing rod;

[0041] 11. Limit rod;

[0042] 21. Motor;

[0043] 22. Rotation axis;

[0044] 23. Turntable;

[0045] 24. Limiting slot;

[0046] 25. Connecting column;

[0047] 26. Sleeve;

[0048] 27. Activity block;

[0049] 28. Connecting block;

[0050] 29. Bolt. DETAILED DESCRIPTION

[0051] 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 some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way serves as any limitation on the present invention and its application or use. 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.

[0052] like Figures 1 to 6 As shown, an embodiment of the present utility model provides a coal mine screening device, including a base 1, a transmission mechanism 2, a collection box 3 and a screen 4, the transmission mechanism 2 includes a motor 21, a turntable 23 and a columnar transmission assembly, the motor 21 is installed on the base 1, and the motor 21 drives the turntable 23 to rotate, the upper surface of the turntable 23 is an inclined surface inclined relative to the horizontal plane, the rotation axis of the turntable 23 is vertically arranged, the lower end of the transmission assembly is installed on the upper surface of the turntable 23, the transmission assembly and the rotation axis of the turntable 23 are spaced apart, the extension direction of the transmission assembly is inclined relative to the vertical direction, the upper end of the transmission assembly is fixedly connected to the lower side of the collection box 3, and the screen 4 is installed on the collection box 3; wherein, when the turntable 23 rotates, the collection box 3 and the screen 4 are driven to shake through the transmission assembly.

[0053] In this solution, the motor drives the turntable to rotate. Since the transmission assembly and the rotation axis of the turntable 23 are spaced apart and the extension direction of the transmission assembly is inclined relative to the vertical direction, the transmission assembly drives the collection box 3 to shake at multiple angles, so that the coal in the screen 4 is shaken evenly, ensuring that the coal that meets the standards is effectively screened into the collection box 3, effectively screening the coal, thereby achieving uniform and stable screening of the coal, reducing screen blockage and maintenance time, and improving screening efficiency.

[0054] The transmission assembly includes a connecting post 25 and a sleeve 26. The connecting post 25 is mounted on the upper surface of the turntable 23 and is perpendicular to the upper surface of the turntable 23. The sleeve 26 is connected to the lower side of the collection box 3 and is sleeved on the connecting post 25. In this way, the turntable 23 drives the sleeve 26 to move, and the sleeve 26 drives the collection box 3 to shake.

[0055] In this embodiment, the transmission mechanism 2 further includes a connecting block 28, which is fixedly connected to the upper end of the sleeve 26. The connecting block 28 is detachably connected to the lower side of the collection box 3 via bolts 29. This allows the collection box 3 to be disassembled when needed.

[0056] like Figure 4 and Figure 5 As shown, the lower surface of the turntable 23 has an annular limiting groove 24, the center line of the limiting groove 24 is the rotation axis of the turntable 23, and the transmission mechanism 2 also includes a vertically arranged limiting column 9, the upper end of the limiting column 9 is inserted into the limiting groove 24.

[0057] The cooperation between the limiting column 9 and the limiting groove 24 can support and guide the turntable 23, so that the turntable 23 can rotate smoothly.

[0058] Furthermore, the transmission mechanism 2 also includes a fixed block 8 and two fixed columns 7. The two fixed columns 7 are fixed to the base 1 and are located on opposite sides of the motor 21. The fixed block 8 is fixed to the two fixed columns 7. The fixed block 8 has an opening that avoids the rotating shaft 22 of the motor 21. There are two limiting columns 9, and both of the limiting columns 9 are mounted on the fixed block 8. The above arrangement further improves the structural stability of the device.

[0059] like Figure 6 As shown, the collecting box 3 has a receiving cavity, and the screen 4 is removably installed in the receiving cavity, with the lower surface of the screen 4 and the bottom wall of the receiving cavity spaced apart. This allows the screen 4 to be removed when needed, such as when the screen 4 is clogged or when replacing a screen 4 with a different aperture.

[0060] The lower surface of the screen 4 is fixedly connected to a plurality of columns 5, the lower ends of which are supported on the bottom wall of the accommodating cavity. The screen 4 is supported by the plurality of columns 5. The end of the screen 4 has a grabbing groove 6 for easy operation.

[0061] like Figures 1 to 4 As shown, the sleeve 26 is fixedly connected to a movable block 27, and the base 1 is fixedly connected to a fixed rod 10, and the fixed rod 10 and the movable block 27 are movably connected. This can limit the rotation range of the sleeve 26 to a certain extent, which is more conducive to realizing the multi-angle shaking of the collection box 3.

[0062] Specifically, the movable block 27 has a groove, and the upper portion of the fixed rod 10 is a limiting rod 11, which is located in the groove of the movable block 27. There is a movable gap between the inner wall of the groove and the limiting rod 11. This arrangement ensures that the movement of the sleeve 26 is restricted while preventing interference and jamming, and has a simple structure and low cost.

[0063] To facilitate understanding of this solution, further explanation is given below.

[0064] See also Figures 1 to 6 The utility model provides a coal screening device used in coal mining, comprising a base 1, a transmission mechanism 2 is fixedly connected to the outer wall of one side of the upper end of the base 1, and a collection box 3 is threadedly connected to the upper end of the transmission mechanism 2;

[0065] The transmission mechanism 2 includes a motor 21 fixedly connected to the outer wall of one side of the upper end of the base 1, a rotating shaft 22 movably connected to the upper end of the motor 21, a turntable 23 fixedly connected to the outer wall of the upper end of the rotating shaft 22, a limiting groove 24 provided on the outer wall of the lower end of the turntable 23, a connecting column 25 fixedly connected to the outer wall of one side of the upper end of the turntable 23, a sleeve 26 movably connected to the outer wall of the upper end of the connecting column 25, a movable block 27 fixedly connected to the outer wall of one side of the sleeve 26, a connecting block 28 fixedly connected to the outer wall of the upper end of the sleeve 26, and a bolt 29 threadedly connected to the outer wall of the connecting block 28;

[0066] A transmission mechanism 2 is fixedly connected to one side of the upper outer wall of the base 1, and the transmission mechanism 2 includes a motor 21. The bottom end of the motor 21 is fixedly connected to the upper outer wall of the base 1, and a rotating shaft 22 is rotatably connected to the upper end of the motor 21, and a turntable 23 is fixedly connected to the upper end of the rotating shaft 22. Therefore, when the motor 21 is started, the motor 21 can drive the rotating shaft 22 to rotate and drive the turntable 23 to rotate, thereby driving the connecting column 25 connected to the upper outer wall of the turntable 23 and the sleeve 26, movable block 27, connecting block 28, bolt 29 and collection box 3 connected through the connecting column 25 to rotate.

[0067] Because the sleeve 26 is movably connected to the connecting post 25, when the connecting post 25 rotates, the sleeve 26 is limited by the movable block 27 on one side and the external part, and the connection between the sleeve 26 and the connecting post 25 rotates accordingly, thereby driving the collection box 3 at the upper end to shake at multiple angles. The upper outer wall of the turntable 23 adopts a beveled plane, and the connecting post 25 is perpendicular to the turntable 23. Therefore, when the sleeve 26 is connected to the connecting post 25, it is also perpendicular to the turntable 23. Therefore, the collection box 3 is initially tilted. Therefore, under the influence of the turntable 23, the connecting post 25 and the sleeve 26, the collection box 3 can be tilted and shaken, thereby allowing the coal poured into it to be shaken evenly and prevented from piling up, thereby allowing the coal to be screened and the required coal to be obtained. The collection box 3 is connected to the connecting block 28 by bolts 29. Therefore, when the required coal is obtained, it can be disassembled to collect the coal inside and transport it uniformly.

[0068] After long-term use, some coal may accumulate inside the collecting box 3 and cannot be completely poured out. Therefore, in this way, it can be disassembled and cleaned regularly, which improves the practicality of the device.

[0069] like Figures 1 to 6 As shown, the upper inner wall of the collection box 3 is provided with a cavity and is movably connected to a screen 4. The bottom end of the screen 4 is fixedly connected to a column 5. A grabbing groove 6 is provided on both sides of the upper outer wall of the screen 4. The screen 4, the column 5 and the grabbing groove 6 are all provided on one side of the inner wall of the collection box 3, and the collection box 3 is movably connected to the connecting block 28 by a bolt 29. The upper outer wall of the base 1 is fixedly connected to a fixing column 7. The upper outer wall of the fixing column 7 is fixedly connected to a fixing block 8. The upper outer wall of the fixing block 8 is fixedly connected to a limiting column 9 on both sides. The bottom end of the sleeve 26 is movably connected to the connecting column 25 connected to the upper end of the turntable 23, and the limiting groove 24 provided at the bottom end of the turntable 23 is slidably connected to the limiting column 9. A fixing rod 10 is fixedly connected to the outer wall of one side of the upper end of the base 1. A limiting rod 11 is provided on the upper outer wall of the fixing rod 10. A groove is provided on the side of the movable block 27 away from the sleeve 26 and is slidably connected to the limiting rod 11 provided on the upper outer wall of the fixing rod 10.

[0070] It should be noted that since the turntable 23 rotates under the action of the rotating shaft 22, in order to enable it to run smoothly, a limiting groove 24 is provided at its lower end, and a fixing column 7, a fixing block 8 and a limiting column 9 are fixedly connected to the outer wall of the upper end of the base 1, and the limiting column 9 can be connected to the limiting groove 24 accordingly, and a limiting column 9 is connected on both sides of the limiting groove 24, which can further play a role in stabilizing its rotation. The two fixing columns 7 and the limiting columns 9 are fixedly connected by a fixing block 8, which can prevent one side from shaking due to the centripetal force, and then the turntable 23 cannot play a protective role when rotating.

[0071] A fixed rod 10 is fixedly connected to the outer wall of one side of the upper end of the base 1, and a limit rod 11 is provided on the upper outer wall of the fixed rod 10. The limit rod 11 can be connected to the movable block 27. A groove is provided on one side of the movable block 27 and is equal in size to the limit rod 11. Therefore, when the movable block 27 shakes with the sleeve 26, the movable block 27 can slide on the limit rod 11, thereby limiting the sleeve 26 and the upper end of the collection box 3 to prevent lateral deviation. A screen 4 is connected to the inner wall of the upper end of the collection box 3, and the lower end of the screen 4 is connected to the column 5. The screen 4 is supported in the collection box 3 by the column 5. Grabbing grooves 6 are provided on both sides of the upper end of the screen 4. Therefore, the screen 4 can be removed through the grabbing grooves 6 and then replaced with a screen 4 of different standards, thereby enabling multi-standard screening of coal. The screened coal will be collected in the collection box 3, which improves the practicality of the device.

[0072] The working principle of the above scheme is: pour the coal to be screened onto the screen 4 on the inner wall of the upper end of the collecting box 3. At this time, the coal will pile up together. At this time, start the motor 21, and the motor 21 drives the rotating shaft 22 to rotate, and the rotating shaft 22 drives the turntable 23 and the connecting column 25 to rotate. The turntable 23 is connected by the limit groove 24 set at the bottom and the limit column 9, so that it can rotate smoothly during rotation. Since the outer wall of the upper end of the turntable 23 adopts a beveled style, and the connecting column 25 is vertically connected to the turntable 23, the connecting column 25 has an inclination, and the connecting column 25 is movably connected to the sleeve 26, and the upper end of the sleeve 26 is connected to the connecting block 28 and the bolt 29, and the collection box 3 is connected to the upper end of the connecting block 28 by the bolt 29, and the outer wall of one side of the sleeve 26 is vertically connected to the movable block 27, and a groove is provided on one side of the movable block 27, and is correspondingly connected to the limiting rod 11 provided on the upper end of the fixed rod 10. Therefore, when the sleeve 26 is rotated by the connecting column 25, it is limited by the movable block 27 and the limiting rod 11. The sleeve 26 will drive the collection box 3 to shake at multiple angles with the connecting column 25 as the center, and the movable block 27 will slide back and forth longitudinally on the outer wall of the limit rod 11. At this time, the coal in the screen 4 can be shaken evenly, and the coal that meets the standards will be screened into the collection box 3, and the screen 4 can be taken out through the grabbing groove 6, and then replaced with a screen 4 of different standards, so that the coal can be screened by multiple standards. After long-term use, the collection box 3 can be disassembled by the bolt 29, and replaced and cleaned, and the coal that has been screened inside it can be uniformly collected and transported subsequently to complete the screening operation.

[0073] The above description is merely an optional embodiment of the present invention and is not intended to limit the present invention. Persons skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

[0074] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0075] Unless otherwise specified, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of this solution. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the drawings are not drawn according to actual proportional relationships. The techniques, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the techniques, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific values ​​should be interpreted as being merely exemplary, rather than limiting. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0076] In the description of this scheme, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this scheme and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this scheme; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0077] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0078] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this solution.

Claims

1. A coal mine screening device, characterized in that: The invention comprises a base (1), a transmission mechanism (2), a collection box (3) and a screen (4), wherein the transmission mechanism (2) comprises a motor (21), a turntable (23) and a columnar transmission assembly, wherein the motor (21) is mounted on the base (1), and the motor (21) drives the turntable (23) to rotate, wherein the upper surface of the turntable (23) is an inclined surface inclined relative to a horizontal plane, and the rotation axis of the turntable (23) is vertically arranged, and the lower end of the transmission assembly is mounted on the upper surface of the turntable (23), and the rotation axes of the transmission assembly and the turntable (23) are spaced apart, and the extension direction of the transmission assembly is inclined relative to the vertical direction, and the upper end of the transmission assembly is fixedly connected to the lower side of the collection box (3), and the screen (4) is mounted on the collection box (3); wherein, when the turntable (23) rotates, the collection box (3) and the screen (4) are driven to shake by the transmission assembly.

2. The coal mine screening device according to claim 1, characterized in that: The transmission assembly includes a connecting column (25) and a sleeve (26), wherein the connecting column (25) is mounted on the upper surface of the turntable (23) and is perpendicular to the upper surface of the turntable (23), and the sleeve (26) is connected to the lower side of the collection box (3), and the sleeve (26) is sleeved on the connecting column (25).

3. The coal mine screening device according to claim 2, characterized in that: The transmission mechanism (2) further comprises a connecting block (28), wherein the connecting block (28) is fixedly connected to the upper end of the sleeve (26), and the connecting block (28) is detachably connected to the lower side of the collection box (3) via bolts (29).

4. The coal mine screening device according to claim 1, characterized in that: The lower surface of the turntable (23) has an annular limiting groove (24), the center line of the limiting groove (24) is the rotation axis of the turntable (23), and the transmission mechanism (2) also includes a vertically arranged limiting column (9), the upper end of the limiting column (9) is inserted into the limiting groove (24).

5. The coal mine screening device according to claim 4, characterized in that: The transmission mechanism (2) further comprises a fixed block (8) and two fixed columns (7), the two fixed columns (7) being fixed to the base (1), the two fixed columns (7) being respectively located on opposite sides of the motor (21), the fixed block (8) being fixed to the two fixed columns (7), the fixed block (8) having an opening for avoiding the rotating shaft (22) of the motor (21), and the two limiting columns (9) being installed on the fixed block (8).

6. The coal mine screening device according to claim 1, characterized in that: The collecting box (3) has a receiving cavity, the screen (4) is installed in the receiving cavity in a removable manner, and the lower surface of the screen (4) and the bottom wall of the receiving cavity are spaced apart.

7. The coal mine screening device according to claim 6, characterized in that: A plurality of columns (5) are fixedly connected to the lower surface of the screen (4), and the lower ends of the columns (5) are supported on the bottom wall of the accommodating cavity.

8. The coal mine screening device according to claim 6, characterized in that: The end of the screen (4) is provided with a gripping groove (6).

9. The coal mine screening device according to claim 2, characterized in that: There is a movable gap between the sleeve (26) and the connecting column (25); a movable block (27) is fixedly connected to the sleeve (26); a fixed rod (10) is fixedly connected to the base (1); and the fixed rod (10) and the movable block (27) are movably connected.

10. The coal mine screening device according to claim 9, characterized in that: The movable block (27) has a groove, the upper part of the fixed rod (10) is a limiting rod (11), the limiting rod (11) is located in the groove of the movable block (27), and there is a movable gap between the inner wall of the groove and the limiting rod (11).

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