Mine stone crushing device

Abstract

The utility model belongs to the field of mine engineering, and particularly relates to a mine stone crushing device which comprises a box body, a feeding port is formed in the left end of the top of the box body, a flow limiting mechanism communicated with the feeding port is arranged on the top wall of the box body, a flow slowing mechanism is arranged at the bottom of the flow limiting mechanism, and the flow slowing mechanism and the flow limiting mechanism are meshed with a transmission mechanism. The output end of the flow slowing mechanism is connected with the smashing mechanism, the screening mechanism is arranged at the bottom of the smashing mechanism, the dust collecting box is arranged at the bottom of the screening mechanism, and the transport cart is arranged at the output end of the screening mechanism. Lump ore enters the flow limiting mechanism through the feeding port and then falls into the slow flow mechanism, the slow flow mechanism controls opening and closing of the flow limiting mechanism according to the weight of the lump ore inside so as to control the entering amount of the lump ore, and the lump ore falls into the smashing mechanism through the slow flow mechanism and then is smashed into small lump ore and dust. Small ores slide to a transport vehicle from the screening mechanism, and dust falls into the dust collection box through the screening mechanism.

Description

Technical Field

[0001] This utility model belongs to the field of mining engineering, and specifically designs a stone crushing device for mining. Background Technology

[0002] Mining technology refers to the techniques used manually or mechanically to extract valuable natural mineral resources. However, freshly mined ore is often too large for transportation and use, making crushing equipment crucial in the mining process as it facilitates subsequent ore processing. However, excessive ore entering the crushing device can cause it to jam, and due to varying degrees of crushing, powder and ore chunks may remain, necessitating their separation. Utility Model Content

[0003] The purpose of this utility model is to provide a crushing device for mining to solve the problems existing in the prior art. To achieve the above-mentioned objective, the technical solution adopted by this utility model is as follows:

[0004] A crushing device for mining includes a housing with an inlet at the top left end. A flow-limiting mechanism connected to the inlet is located on the top wall of the housing. A flow-slowing mechanism is located at the bottom of the flow-limiting mechanism. The flow-slowing mechanism and the flow-limiting mechanism mesh with a transmission mechanism. The output end of the flow-slowing mechanism is connected to a crushing mechanism. A screening mechanism is located at the bottom of the crushing mechanism, and a dust collection box is located at the bottom of the screening mechanism. A transport vehicle is located at the output end of the screening mechanism. Large pieces of ore enter the flow-limiting mechanism through the inlet and then fall into the flow-slowing mechanism. The flow-slowing mechanism controls the opening and closing of the flow-limiting mechanism based on the weight of the large pieces of ore, thereby controlling the amount of large pieces of ore entering. After falling into the crushing mechanism through the flow-slowing mechanism, the large pieces of ore are crushed into small pieces of ore and dust. The small pieces of ore slide down the screening mechanism to the transport vehicle, and the dust falls into the dust collection box through the screening mechanism.

[0005] Furthermore, the flow-limiting mechanism includes a fixed plate, a sliding plate, and a gear. The fixed plate is fixedly mounted on the top wall of the housing. The gear is rotatably mounted on the bottom of the fixed plate. Six triangular prisms with their sides connected end-to-end are provided between the gear and the fixed plate. One side of each of the six triangular prisms overlaps. A slider is located at the top of the end of each of the six triangular prisms away from the overlapping side, and a slider is located at the bottom of the end of each of the six triangular prisms away from the overlapping side. The fixed plate has an opening at its center. Six inclined through slots are evenly arranged around the opening on the fixed plate. The gear has an opening at its center. The upper surface of the gear has six hexagonal sliding slots connected end-to-end. A slider is slidably mounted in each of the sliding slots. A slider is slidably mounted in each of the through slots. The gear meshes with the transmission mechanism. The openings one, two, and the center of the inlet are located on the same vertical line.

[0006] Furthermore, the flow-slowing mechanism includes a buffer block, teeth, a spring, and a fixed base plate. The fixed base plate is horizontally arranged on the inner side wall of the box. One end of the buffer block is provided with an arc-shaped groove, and the other end of the buffer block is provided with teeth arranged in a vertical direction. The input end of the arc-shaped groove is connected to the second opening, and the output end of the arc-shaped groove is connected to the crushing mechanism. The teeth mesh with the transmission mechanism. The two ends of the spring are respectively connected to the bottom of the buffer block and the top of the fixed base plate.

[0007] Furthermore, the transmission mechanism includes gear two, bevel gear one, bevel gear two, and gear three; gear two and bevel gear one are respectively located at both ends of a horizontally arranged connecting rod one, and bevel gear two and gear three are respectively located at both ends of a vertically arranged connecting rod two. The connecting rod one is rotatably mounted on a fixed bracket one, and the connecting rod two is rotatably mounted on a fixed bracket two. The fixed bracket one and the fixed bracket two are fixedly mounted on the inner wall of the housing. Gear three meshes with gear one, and gear two meshes with the teeth.

[0008] Furthermore, the crushing mechanism includes a transmission rod, a roller, and transmission teeth; two parallel transmission rods are rotatably passed through the two distant inner walls of the housing, and the rollers are fixedly mounted on the transmission rods. Each roller has multiple sets of teeth evenly arranged along its length, each set including multiple crushing teeth evenly arranged circumferentially along its surface. The sets of teeth on the two rollers are spaced apart and mesh with each other. One end of the transmission rod has the transmission teeth, and a power mechanism is provided on one of the housing's corresponding outer walls. The power mechanism includes an outer housing, which is located on the outer wall of the housing. A motor is located inside the outer housing, and the motor's output end has output teeth. The output teeth mesh with one of the transmission teeth and a gear, and the gear meshes with the other transmission tooth.

[0009] Furthermore, the screening mechanism includes a screening plate, a crossbar one, and a crossbar two; the crossbar one and the crossbar two are arranged parallel to each other in the housing, the vertical height of the crossbar one is higher than that of the crossbar two, one end of the screening plate is rotatably connected to the crossbar two, and a plurality of springs two are evenly provided at the bottom of the other end of the screening plate, the two ends of the springs two are respectively connected to the screening plate and the crossbar one, the crossbar one is provided with a cylinder, the output end of the cylinder is connected to the bottom of the screening plate, and the screening plate is used to screen ore.

[0010] Furthermore, the bottom of the box is provided with a dust collection box, which is located on the same vertical line as the sieve plate. The side wall of the box is provided with a perforation, and a dust discharge pipe is provided in the perforation. The dust discharge pipe connects to the outside and the dust collection box, and a negative pressure fan is provided in the dust discharge pipe.

[0011] Furthermore, the screening plate is located at one end of the crossbar and connected to the transport vehicle. The transport vehicle includes an outer body and an inner body. The inner body is housed inside the outer body. A slide rail is vertically mounted on the inner wall of the outer body, and a slider is vertically mounted on the outer wall of the inner body. The slider is slidably mounted within the slide rail. A spring for vibration damping is provided between the bottom of the inner body and the outer body. A wheel set is rotatably mounted on the bottom of the outer body. A handle for pushing is provided on the top of the outer wall of the outer body. A fixing plate is provided on the top of the outer wall. An opening is provided on the side wall of the box. A fixing plate is provided on the top of the opening. The transport vehicle is slidably mounted in the opening. The fixing plate and the fixing plate are fixed by a pin.

[0012] This invention offers the following advantages: It incorporates a flow-limiting mechanism that automatically adjusts the inlet size based on the amount of ore added, thereby regulating the amount of ore entering the chamber and preventing excessive ore from causing blockages. It also includes a screening mechanism that separates ore powder and ore lumps through vibration, which simultaneously causes the ore lumps to fall quickly into the transport vehicle, accelerating the crushing process. Finally, it features a transport vehicle that enables rapid ore transfer. Attached Figure Description

[0013] Figure 1 This is a three-dimensional view of the device;

[0014] Figure 2 This is an exploded view of the device;

[0015] Figure 3 It is a 3D view of the box;

[0016] Figure 4 This is a 3D view of the power mechanism and the crushing mechanism;

[0017] Figure 5This is a front sectional view of the device;

[0018] Figure 6 This is an exploded view of the flow-limiting mechanism;

[0019] Figure 7 yes Figure 2 Enlarged view of point A in the middle;

[0020] Figure 8 yes Figure 2 Enlarged view at point B in the middle;

[0021] Figure 9 yes Figure 2 Enlarged view at point C;

[0022] Figure 10 yes Figure 5 Enlarged view at point D;

[0023] Figure 11 These are two state diagrams showing the current limiting mechanism when it is open and closed.

[0024] Figure label:

[0025] Box 1, Fixed insert plate 2 102, Opening 103, Through hole 104, Fixed base plate 106, Power mechanism 2, Outer box 201, Motor 202, Output gear 203, Crushing mechanism 3, Transmission rod 301, Roller 302, Crushing gear 303, Transmission gear 304, Flow control mechanism 4, Buffer block 401, Arc-shaped chute 402, Tooth section 403, Spring 1 404, Flow limiting mechanism 5, Through groove 502, Fixed plate 501, Through groove 502, Sliding plate 503, Sliding block 1 504, Gear 1 505, Sliding groove 1 506, Opening 1 507. 508 Opening 2, 509 Slider 2, 6 Screening Mechanism, 601 Screening Plate, 602 Spring 2, 603 Crossbar 1, 604 Cylinder, 605 Crossbar 2, 7 Transport Vehicle, 701 Outer Body, 702 Inner Body, 703 Slider, 704 Slide Rail, 705 Handle, 706 Fixed Insert Plate 1, 707 Spring 3, 8 Dust Collection Box, 801 Dust Exhaust Pipe, 9 Transmission Mechanism, 901 Gear 2, 902 Fixed Bracket 1, 903 Connecting Rod 1, 904 Bevel Gear 1, 905 Bevel Gear 2, 906 Connecting Rod 2, 907 Fixed Bracket 2, 908 Gear 3. Detailed Implementation

[0026] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Unless otherwise specified, the technical means used in the embodiments are conventional means well known to those skilled in the art.

[0027] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0028] like Figure 1-10 As shown, the device includes a housing 1. A feed inlet is located at the top left end of the housing 1. A flow-limiting mechanism 5, connected to the feed inlet, is located on the top wall of the housing 1. A flow-slowing mechanism 4 is located at the bottom of the flow-limiting mechanism 5. The flow-slowing mechanism 4 and the flow-limiting mechanism 5 engage with a transmission mechanism 9. The output end of the flow-slowing mechanism 4 is connected to a crushing mechanism 3. A screening mechanism 6 is located at the bottom of the crushing mechanism 3. A dust collection box 8 is located at the bottom of the screening mechanism 6. A transport vehicle 7 is located at the output end of the screening mechanism 6. Large pieces of ore enter the flow-limiting mechanism 5 through the feed inlet and then fall into the flow-slowing mechanism 4. The flow-slowing mechanism 4 controls the opening and closing of the flow-limiting mechanism 5 based on the weight of the large pieces of ore, thereby controlling the amount of large pieces of ore entering. After falling into the crushing mechanism 3 through the flow-slowing mechanism 4, the large pieces of ore are crushed into small pieces of ore and dust. The small pieces of ore slide down the screening mechanism 6 to the transport vehicle 7, and the dust falls into the dust collection box 8 through the screening mechanism 6.

[0029] like Figure 6 As shown, the flow-limiting mechanism 5 includes a fixed plate 501, a sliding plate 503, and a gear 505. The fixed plate 501 is fixedly mounted on the top wall of the housing 1. The gear 505 is rotatably mounted on the bottom of the fixed plate 501. Six triangular prisms with their sides connected end to end are provided between the gear 505 and the fixed plate 501. One side of each of the six triangular prisms overlaps. A slider 504 is located at the top of the end of each of the six triangular prisms away from the overlapping side, and a slider 509 is located at the bottom of the end of each of the six triangular prisms away from the overlapping side. An opening is provided in the center of the fixed plate 501. The fixed plate 501 has six inclined through slots 502 evenly arranged around the opening 507. The gear 505 has an opening 508 at its center. The upper surface of the gear 505 has six hexagonal sliding grooves 506 connected end-to-end. A slider 509 is slidably mounted in each of the sliding grooves 506. A slider 504 is slidably mounted in each of the through slots 502. The gear 505 meshes with the transmission mechanism 9. The openings 507, 508, and the feed inlet are located on the same vertical line. When the gear 505 is rotated, the slider 509 slides within the sliding groove 506, thus causing the sliding plate 503 to open or close (e.g., ...). Figure 11 As shown, the size of the opening varies depending on the degree of rotation of gear 505, and the size of the ore that can enter the box 1 varies.

[0030] like Figure 7 As shown, the flow control mechanism 4 includes a buffer block 401, teeth 403, a spring 404, and a fixed base plate 106. The fixed base plate 106 is horizontally arranged on the inner side wall of the housing 1. One end of the buffer block 401 is provided with an arc-shaped groove 402, and the other end of the buffer block 401 is provided with teeth 403 arranged in the vertical direction. The input end of the arc-shaped groove 402 is connected to the second opening 508, and the output end of the arc-shaped groove 402 is connected to the crushing mechanism 3. The teeth 403 mesh with the transmission mechanism 9. The two ends of the spring 404 are respectively connected to the bottom of the buffer block 401 and the top of the fixed base plate 106. The transmission mechanism 9 includes a second gear 901, a first bevel gear 904, a second bevel gear 905, and a third gear 908. The second gear 901 and the first bevel gear 904 are located at both ends of a horizontally arranged connecting rod 903, while the second bevel gear 905 and the third gear 908 are located at both ends of a vertically arranged connecting rod 906. The first connecting rod 903 is rotatably mounted on a fixed bracket 902, and the second connecting rod 906 is rotatably mounted on a fixed bracket 907. The first fixed bracket 902 and the second fixed bracket 907 are fixedly mounted on the inner wall of the housing 1. The third gear 908 meshes with the first gear 505, and the second gear 901 meshes with the toothed portion 403. When there is no ore in the buffer block 401, the sliding plate 503 is fully extended (e.g., Figure 11 As shown in the figure below, after the ore slides into the feed inlet, it falls into the arc-shaped chute 402. The pressure of the buffer block 401 is different for different weights (sizes) of ore, and the buffer block 401 moves downwards at different distances. Through the transmission of the toothed part 403, the rotation angle of the gear 505 is different, which in turn makes the sliding distance of the sliding plate 503 different. The heavier ore presses the buffer block 401 downwards to a greater extent, and the sliding distance of the sliding plate 503 is greater, thus reducing the opening size. Only ore of the corresponding size can enter the box 1.

[0031] like Figure 2 , 4As shown, the crushing mechanism 3 includes a transmission rod 301, a roller 302, and transmission teeth 304; two parallel transmission rods 301 are rotatably inserted through the two distant inner walls of the housing 1, and the roller 302 is fixedly mounted on the transmission rod 301. The roller 302 has a plurality of teeth evenly arranged along its length, each tooth including a plurality of crushing teeth 303 evenly arranged circumferentially along the surface of the roller 302. The teeth on the two rollers 302 are spaced apart and mesh with each other; the transmission rod 301... One end is provided with the transmission tooth 304, and the box body 1 and its corresponding outer wall are provided with a power mechanism 2. The power mechanism 2 includes an outer box body 201, which is disposed on the outer side wall of the box body 1. A motor 202 is provided inside the outer box body 201. The output end of the motor 202 is provided with an output tooth 203. The output tooth 203 meshes with one of the transmission teeth 304 and a gear 4 204. The gear 4 204 meshes with the other transmission tooth 304. The two rollers 302 rotate in opposite directions to achieve a better crushing effect.

[0032] like Figure 8 As shown, the screening mechanism 6 includes a screening plate 601, a first crossbar 603, and a second crossbar 605. The first crossbar 603 and the second crossbar 605 are arranged parallel to each other in the housing 1. The first crossbar 603 is vertically higher than the second crossbar 605. One end of the screening plate 601 is rotatably connected to the second crossbar 605. A plurality of second springs 602 are evenly provided at the bottom of the other end of the screening plate 601. The two ends of the second springs 602 are respectively connected to the screening plate 601 and the first crossbar 603. A cylinder 604 is provided on the first crossbar 603. The output end of the cylinder 604 is connected to the bottom of the screening plate 601. The screening plate 601 is used for screening ore. The sieve plate 601 is inclined so that the crushed ore can slide down along it to the transport vehicle 7. The output end of the cylinder 604 moves up and down to drive the sieve plate 601 to vibrate, so that the ore powder can fall into the dust collection box 8 to prevent it from getting stuck on the sieve plate 601. At the same time, the vibration drives the ore to move downward to prevent it from accumulating on the sieve plate 601.

[0033] like Figure 2 As shown, the dust collection box 8 is located at the bottom of the housing 1. The dust collection box 8 and the sieve plate 601 are on the same vertical line. A perforation 104 is provided on the side wall of the housing 1, and a dust discharge pipe 801 is installed in the perforation 104. The dust discharge pipe 801 connects to the outside and the dust collection box 8, and a negative pressure fan is installed in the dust discharge pipe 801. The dust collection box 8 can collect ore powder, which is discharged into a collection device through the dust discharge pipe 801 for use in other processes.

[0034] like Figure 9-10As shown, the screening plate 601 is located at one end of the crossbar 605 and connected to the transport vehicle 7. The transport vehicle 7 includes an outer body 701 and an inner body 702. The inner body 702 is disposed inside the outer body 701. A slide rail 704 is vertically disposed on the inner wall of the outer body 701. A slider 703 is vertically disposed on the outer wall of the inner body 702. The slider 703 is slidably disposed within the slide rail 704. A connection is provided between the bottom of the inner body 702 and the outer body 701. A third spring 707 is used for vibration damping. The bottom of the outer car body 701 is rotatably equipped with a wheel assembly 708. A handle 705 for pushing is located on the top of one outer wall of the outer car body 701. A first fixing plate 706 is located on the top of the outer wall. An opening 103 is provided on the side wall of the housing 1. A second fixing plate 102 is located on the top of the opening 103. The transport vehicle 7 is slidably mounted on the opening 103. The second fixing plate 102 and the first fixing plate 706 can be fixed by a pin. The third spring 707 is used for vibration damping to prevent damage to the inner car body 702 from hard impacts from ore. The transport vehicle 7 can be fixed / released by inserting / removing the pin. The operator can push the transport vehicle 7 using the handle 705 to transfer the ore inside.

[0035] Working principle: Raw ore is fed into the feed inlet via a conveyor belt and falls into the buffer block 401. The descent height of the buffer block 401 varies depending on the weight of the raw ore, thereby controlling the opening and closing of the inlet of the flow limiting mechanism 5 to achieve the purpose of flow restriction. When the weight of the raw ore is large, the opening and closing degree of the flow limiting mechanism 5 is small, allowing only small pieces of ore to enter. Then, the raw ore falls into the crushing mechanism 3 via the buffer block 401, and is crushed into small pieces of ore by the rollers 302 and crushing teeth 303. The ore then falls into the screening plate 601. Dust falls into the dust collection box 8 through the small holes on the screening plate 601. Slightly larger pieces of ore roll into the transport vehicle 7 through the screening plate 601. When there is enough ore in the transport vehicle 7, the operator can transfer the ore to the collection point through the transport vehicle 7.

[0036] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Any modifications, alterations, alterations, or substitutions made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model shall fall within the protection scope defined by the claims of the present utility model.

Claims

1. A stone crushing device for mining, characterized in that: Includes a housing (1), with an inlet at the top left end of the housing (1), a flow-limiting mechanism (5) connected to the inlet on the top wall of the housing (1), a flow-slowing mechanism (4) at the bottom of the flow-limiting mechanism (5), the flow-slowing mechanism (4) and the flow-limiting mechanism (5) meshing with a transmission mechanism (9), the output end of the flow-slowing mechanism (4) connected to a crushing mechanism (3), a sieving mechanism (6) at the bottom of the crushing mechanism (3), a dust collection box (8) at the bottom of the sieving mechanism (6), and the sieving mechanism (6) The output end is equipped with a transport vehicle (7); large pieces of ore enter the flow limiting mechanism (5) through the feed port and then fall into the slow flow mechanism (4). The slow flow mechanism (4) controls the opening and closing of the flow limiting mechanism (5) according to the weight of the large pieces of ore inside, thereby controlling the amount of large pieces of ore entering. After the large pieces of ore fall into the crushing mechanism (3) through the slow flow mechanism (4), they are crushed into small pieces of ore and dust. The small pieces of ore slide down to the transport vehicle (7) through the screening mechanism (6), and the dust falls into the dust collection box (8) through the screening mechanism (6).

2. The crushing device for mining as described in claim 1, characterized in that: The flow limiting mechanism (5) includes a fixed plate (501), a sliding plate (503), and a gear (505). The fixed plate (501) is fixedly mounted on the top wall of the housing (1). The gear (505) is rotatably mounted on the bottom of the fixed plate (501). Six triangular prisms with their sides connected end to end are provided between the gear (505) and the fixed plate (501). One side of each of the six triangular prisms overlaps. A slider (504) is provided at the top of the end of each of the six triangular prisms away from the overlapping side, and a slider (509) is provided at the bottom of the end of each of the six triangular prisms away from the overlapping side. An opening (504) is provided at the center of the fixed plate (501). 7) The fixed plate (501) is provided with six inclined through slots (502) evenly arranged around the opening one (507) in the circumference. The gear one (505) is provided with an opening two (508) in the center. The upper surface of the gear one (505) is provided with six regular hexagonal sliding grooves one (506) connected end to end. Each sliding groove one (506) is provided with a sliding block two (509). The through slot (502) is provided with a sliding block one (504). The gear one (505) meshes with the transmission mechanism (9). The opening one (507), the opening two (508) and the center of the feed port are located on the same vertical line.

3. A crushing device for mining according to claim 2, characterized in that: The slow-flow mechanism (4) includes a buffer block (401), teeth (403), spring one (404), and a fixed base plate (106). The fixed base plate (106) is horizontally arranged on the inner side wall of the box (1). One end of the buffer block (401) is provided with an arc-shaped groove (402), and the other end of the buffer block (401) is provided with teeth (403) arranged in the vertical direction. The input end of the arc-shaped groove (402) is connected to the second opening (508), and the output end of the arc-shaped groove (402) is connected to the crushing mechanism (3). The teeth (403) mesh with the transmission mechanism (9). The two ends of the spring one (404) are respectively connected to the bottom of the buffer block (401) and the top of the fixed base plate (106).

4. A crushing device for mining according to claim 3, characterized in that: The transmission mechanism (9) includes gear 2 (901), bevel gear 1 (904), bevel gear 2 (905), and gear 3 (908); gear 2 (901) and bevel gear 1 (904) are respectively located at both ends of the horizontally arranged connecting rod 1 (903), bevel gear 2 (905) and gear 3 (908) are respectively located at both ends of the vertically arranged connecting rod 2 (906), the connecting rod 1 (903) is rotatably mounted on the fixed bracket 1 (902), the connecting rod 2 (906) is rotatably mounted on the fixed bracket 2 (907), the fixed bracket 1 (902) and the fixed bracket 2 (907) are fixedly mounted on the inner wall of the housing (1), gear 3 (908) meshes with gear 1 (505), and gear 2 (901) meshes with the toothed part (403).

5. A crushing device for mining according to claim 3, characterized in that: The crushing mechanism (3) includes a transmission rod (301), a roller (302), and transmission teeth (304); two parallel transmission rods (301) are rotatably inserted through the two distant inner walls of the housing (1), and the roller (302) is fixedly mounted on the transmission rod (301). The roller (302) is evenly provided with multiple tooth groups along its length, and the tooth groups include multiple crushing teeth (303) evenly arranged along the circumferential direction of the surface of the roller (302); one end of the transmission rod (301) is provided with the transmission teeth (304). The housing (1) and its corresponding outer wall are provided with a power mechanism (2). The power mechanism (2) includes an outer housing (201). The outer housing (201) is disposed on the outer side wall of the housing (1). The outer housing (201) is provided with a motor (202). The output end of the motor (202) is provided with an output tooth (203). The output tooth (203) meshes with one of the transmission teeth (304) and gear four (204). The gear four (204) meshes with the other transmission tooth (304).

6. A crushing device for mining according to claim 1, characterized in that: The screening mechanism (6) includes a screening plate (601), a crossbar one (603), and a crossbar two (605); the crossbar one (603) and the crossbar two (605) are arranged parallel to the box body (1), the vertical height of the crossbar one (603) is higher than that of the crossbar two (605), one end of the screening plate (601) is rotatably connected to the crossbar two (605), and a plurality of springs two (602) are evenly provided at the bottom of the other end of the screening plate (601). The two ends of the springs two (602) are respectively connected to the screening plate (601) and the crossbar one (603). A cylinder (604) is provided on the crossbar one (603), and the output end of the cylinder (604) is connected to the bottom of the screening plate (601). The screening plate (601) is used to screen ore.

7. A crushing device for mining according to claim 6, characterized in that: The bottom of the box (1) is provided with the dust collection box (8), the dust collection box (8) and the sieve plate (601) are located on the same vertical line, the side wall of the box (1) is provided with a perforation (104), the perforation (104) is provided with a dust discharge pipe (801), the dust discharge pipe (801) is connected to the outside and the dust collection box (8), and a negative pressure fan is provided in the dust discharge pipe (801).

8. A crushing device for mining according to claim 7, characterized in that: The screening plate (601) is located at one end of the crossbar (605) and connected to the transport vehicle (7). The transport vehicle (7) includes an outer body (701) and an inner body (702). The inner body (702) is located inside the outer body (701). A slide rail (704) is vertically arranged on the inner wall of the outer body (701). A slider (703) is vertically arranged on the outer wall of the inner body (702). The slider (703) is slidably arranged in the slide rail (704). A connection is provided between the bottom of the inner body (702) and the outer body (701). Spring 3 (707) for vibration damping; wheel set (708) is rotatably provided at the bottom of the outer body (701); handle (705) for pushing is provided at the top of an outer wall of the outer body (701); fixed insert plate 1 (706) is provided at the top of the outer wall; opening (103) is provided on the side wall of the box (1); fixed insert plate 2 (102) is provided at the top of the opening (103); transport vehicle (7) is slidably provided in the opening (103); fixed insert plate 2 (102) and fixed insert plate 1 (706) can be fixed by a pin.

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