Anti-blocking device of coal crusher

Abstract

The utility model discloses an anti-blocking device of a coal crusher. Due to the fact that most of sealing materials of the valve seat are rubber, plastic and the like, the valve seat and the valve body can be aged and hardened as time goes on, connection between the valve seat and the valve body is tighter, and therefore the disassembly difficulty is increased. The device comprises a crushing box (1), the top of the crushing box is fixedly connected with a feeding port (2), a crushing assembly (3) is installed on the top of the inner side of the crushing box, an anti-blocking assembly (4) is installed at the bottom of the inner side of the crushing box, a discharging port is formed in the bottom of the crushing box, and the bottom of the anti-blocking assembly extends to the outer side of the bottom of the crushing box through the discharging port. A shielding assembly (5) is installed on the outer side of the top of the crushing box. The anti-blocking device is used for preventing blocking of the coal crusher.

Description

Technical Field

[0001] The utility model relates to the technical field of coal crushing, in particular to an anti-blocking device for a coal crusher. Background Art

[0002] Coal crusher is a mechanical equipment used to crush coal ore or coal lumps. Its main function is to break large pieces of coal materials into smaller particles or powder to meet the needs of different industrial applications.

[0003] Reference is made to the authorized announcement number "CN216910430U" which discloses a non-clogging crusher device for chemical coal sample preparation, which records: "When the worm rotates, it can drive the dragon conveying blades to rotate. The rotation of the dragon conveying blades can achieve the effect of orderly discharging, thereby avoiding the crusher from being easily blocked during discharging. The baffle can block the coal splashing inside the device, preventing the coal from splashing out from the inside of the device under the squeezing of the crushing roller, effectively avoiding damage to the operator." Technical problems.

[0004] In the process of implementing the patent, the applicant found that the patent had the following technical problems:

[0005] Since the crusher set in this patent concentrates the crushed coal at the bottom of the device and transmits it to the outside through the auger when discharging, when the humidity of the crushed coal is high, it is easy to stick to the side walls inside the device and the surface of the auger. Therefore, long-term adhesion and accumulation can easily cause blockage at the discharge port. Therefore, it is necessary to propose a coal crusher anti-blocking device to provide a new technical solution to solve the technical problems mentioned in the above patent. Utility Model Content

[0006] The utility model provides a coal crusher anti-blocking device, which is used to solve the following technical problems raised in the background technology: since the crusher set in the patent concentrates the crushed coal at the bottom of the device when discharging, and transmits it to the outside through the auger, when the humidity of the crushed coal is high, it is easy to stick to the side wall inside the device and the surface of the auger, so long-term adhesion and accumulation can easily cause blockage at the discharge port.

[0007] The above purpose is achieved through the following technical solutions:

[0008] A coal crusher anti-blocking device, comprising a crushing box, a feed port fixedly connected to the top of the crushing box, a crushing assembly installed at the top of the inner side of the crushing box, an anti-blocking assembly installed at the bottom of the inner side of the crushing box, a discharge port opened at the bottom of the crushing box, and the bottom of the anti-blocking assembly extends through the discharge port to the outside of the bottom of the crushing box, and a shielding assembly is installed at the outside of the top of the crushing box;

[0009] The crushing assembly includes a crushing roller, a first gear, a second gear, a third gear and a first motor. A first movable groove is provided on the inner side of the side wall at one end of the crushing box. Crushing rollers are rotatably connected to both sides of the top of the crushing box. One end of the crushing roller close to the first movable groove extends to the inner side of the first movable groove, and the outer side of one end of the crushing roller located on the inner side of the first movable groove is fixedly connected to the first gear. The second gear and the third gear are rotatably connected to the inner side of the first movable groove. The second gear and the third gear are located between the two first gears. The second gear and the third gear are meshingly connected, and the second gear and the third gear are respectively meshingly connected to the two first gears. The first motor is fixedly connected to the outer side of the crushing box, and the output end of the first motor extends to the inner side of the first movable groove and is fixedly connected to one of the crushing rollers.

[0010] The anti-blocking device of a coal crusher is described, and the anti-blocking component includes a rotating seat, a baffle plate, a first right-angle plate and a connecting spring. The inner side walls at both ends of the crushing box are fixedly connected to two rotating seats, each two rotating seats are arranged as a group, and the heights of the two groups of rotating seats are different. Shield plates are arranged at both ends of the inner side of the crushing box, and the baffle plates are rotatably connected to each group of rotating seats. The bottom of the baffle plate away from the rotating seat is fixedly connected to the first right-angle plate, and both sides of the baffle plate close to the bottom of the rotating seat are fixedly connected to connecting springs, and the connecting springs are arranged obliquely, and the ends of the connecting springs away from the baffle plate are fixedly connected to the inner side walls of the crushing box.

[0011] The anti-blocking device of a coal crusher described in the embodiment of the present invention further includes a first rotating rod, a toggle plate, a transmission belt and a second motor, both ends of the inner side of the crushing box are rotatably connected to the first rotating rod, the first rotating rods are arranged below the baffle plate, the outer side of the first rotating rod is fixedly connected to a plurality of toggle plates in a circular array, and the toggle plates are toggle-matched with the first right-angle plate, a second movable groove is provided on the inner side of the side wall of one side of the crushing box, the first rotating rod on the side close to the second movable groove extends to the inner side of the second movable groove, a transmission belt is provided on the inner side of the second movable groove, and the transmission belt wraps the two first rotating rods and is arranged on the outer side of the inner side of the second movable groove, and the transmission belt has a transmission effect on the two first rotating rods, the outer side of the crushing box close to the second movable groove is fixedly connected to the second motor, and the output end of the second motor extends to the inner side of the second movable groove and is fixedly connected to one of the first rotating rods.

[0012] The anti-blocking device of a coal crusher described in claim 1, wherein the anti-blocking component also includes a first fixed plate, a guide inclined plate, a second fixed plate, a second rotating rod, a transmission belt and a third motor, both ends of the inner side of the bottom of the crushing box are fixedly connected to the first fixed plate, and the first fixed plate extends to the outer side of the bottom of the crushing box through the discharge port, the first fixed plate is located at the top of the inner side of the bottom of the crushing box and is fixedly connected to the guide inclined plate, and the two guide inclined plates are inclined, the first fixed plate is located at both ends of the outer side of the bottom of the crushing box and is fixedly connected to the second fixed plate, the two sides between the two first fixed plates are rotatably connected to the second rotating rod, the outer side of the two second rotating rods is wrapped with a transmission belt, and the transmission belt plays a transmission role for the two second rotating rods, one end of one of the first fixed plates located on the outer side of the crushing box is fixedly connected to the third motor, and the output end of the third motor passes through the first fixed plate and the corresponding second fixed plate and is fixedly connected to the corresponding second rotating rod.

[0013] The anti-blocking device of a coal crusher is described, and the shielding assembly includes a first support plate, a third rotating rod and a second right-angle plate. The first support plates are fixedly connected to both sides of the outer ends of the top of the crushing box, and the inner sides of every two first support plates are rotatably connected to the third rotating rods. The outer sides of the third rotating rods are fixedly connected to the second right-angle plates, and the tops of the second right-angle plates have a shielding effect on the top of the feed port.

[0014] The anti-blocking device of a coal crusher described herein, the shielding assembly also includes a double-headed motor, a fourth rotating rod, a second support plate and a bevel gear group, the double-headed motor is fixedly connected to the middle part of one side of the outer side of the top of the crushing box, the output ends at both ends of the double-headed motor are fixedly connected to the fourth rotating rod, the outer side of the fourth rotating rod away from the end of the double-headed motor is rotatably connected to the second support plate, and the second support plates are fixedly connected to the outer side of the crushing box, the outer side of the fourth rotating rod away from the end of the double-headed motor is provided with a bevel gear group, and the fourth rotating rod drives the third rotating rod to rotate through the bevel gear group. Beneficial Effects

[0015] 1. After the coal blocks are crushed, the utility model can shield the broken coal in the falling process, thereby slowing down the speed at which the broken coal falls to the bottom of the device and reducing the accumulation of broken coal, thereby reducing the phenomenon of broken coal with excessive humidity blocking the discharge port.

[0016] 2. The utility model can shield the feed port, thereby preventing coal slag from popping out during the coal crushing process, and can also create a squeezing effect on the coal blocks at the feed port, thereby further improving the efficiency of coal block crushing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the crushing component of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the anti-blocking component of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the crushing roller of the utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the shielding plate of the utility model;

[0022] Figure 6 It is a structural schematic diagram of the transmission belt of the utility model;

[0023] Figure 7 It is a structural schematic diagram of the transmission belt of the utility model;

[0024] Figure 8 This is a schematic structural diagram of the second right-angle plate of the utility model;

[0025] In the figure: 1. crushing box; 2. feed inlet; 3. crushing assembly; 4. anti-blocking assembly; 5. shielding assembly; 6. crushing roller; 7. first gear; 8. second gear; 9. third gear; 10. first motor; 11. rotating seat; 12. shielding plate; 13. first right-angle plate; 14. connecting spring; 15. first rotating rod; 16. toggle plate; 17. transmission belt; 18. second motor; 19. first fixed plate; 20. guide inclined plate; 21. second fixed plate; 22. second rotating rod; 23. transmission belt; 24. third motor; 25. first support plate; 26. third rotating rod; 27. second right-angle plate; 28. double-headed motor; 29. ​​fourth rotating rod; 30. second support plate; 31. bevel gear set. DETAILED DESCRIPTION

[0026] The utility model provides an anti-blocking device for a coal crusher, which can shield the broken coal in the falling process after the coal blocks are broken, thereby slowing down the speed at which the broken coal falls to the bottom of the device and reducing the accumulation of broken coal, thereby reducing the phenomenon of broken coal with excessive humidity blocking the discharge port.

[0027] Specifically, please refer to Figure 1-Figure 4 A coal crusher anti-blocking device specifically comprises a crushing box 1, a feed port 2 is fixedly connected to the top of the crushing box 1, a crushing component 3 is installed on the top of the inner side of the crushing box 1, an anti-blocking component 4 is installed on the bottom of the inner side of the crushing box 1, a discharge port is opened at the bottom of the crushing box 1, and the bottom of the anti-blocking component 4 extends through the discharge port to the outside of the bottom of the crushing box 1, and a shielding component 5 is installed on the outside of the top of the crushing box 1;

[0028] The crushing assembly 3 includes a crushing roller 6, a first gear 7, a second gear 8, a third gear 9 and a first motor 10. A first movable groove is opened on the inner side of the side wall at one end of the crushing box 1, and crushing rollers 6 are rotatably connected on both sides of the top of the crushing box 1. The end of the crushing roller 6 close to the first movable groove extends to the inner side of the first movable groove, and the outer side of the end of the crushing roller 6 located on the inner side of the first movable groove is fixedly connected with the first gear 7. The second gear 8 and the third gear 9 are rotatably connected to the inner side of the first movable groove, and the second gear 8 and the third gear 9 are located between the two first gears 7. The second gear 8 and the third gear 9 are meshingly connected, and the second gear 8 and the third gear 9 are respectively meshingly connected with the two first gears 7. The first motor 10 is fixedly connected to the outer side of the crushing box 1, and the output end of the first motor 10 extends to the inner side of the first movable groove and is fixedly connected to one of the crushing rollers 6.

[0029] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings.

[0030] Please refer to Figure 1-Figure 4 A coal crusher anti-blocking device comprises a crushing box 1, a feed port 2 is fixedly connected to the top of the crushing box 1, a crushing assembly 3 is installed on the top of the inner side of the crushing box 1, an anti-blocking assembly 4 is installed on the bottom of the inner side of the crushing box 1, a discharge port is opened at the bottom of the crushing box 1, and the bottom of the anti-blocking assembly 4 extends to the outside of the bottom of the crushing box 1 through the discharge port, and a shielding assembly 5 is installed on the outside of the top of the crushing box 1;

[0031] When in use, a large piece of coal can be placed inside the feed port 2, and then the coal can be squeezed and crushed by the setting of the crushing component 3, so that the coal can be crushed;

[0032] Then, by setting the anti-blocking component 4, the falling broken coal blocks can be shielded, thereby preventing the coal blocks from falling too fast after breaking and accumulating on the inner side of the bottom of the crushing box 1, thereby preventing the broken coal from blocking the bottom of the crushing box 1.

[0033] By setting the shielding component 5, the top of the feed port 2 can be shielded, thereby preventing the coal blocks from flying when the crushing component 3 crushes the coal blocks. At the same time, when there are larger coal blocks on the inside of the feed port 2, the coal blocks can be squeezed, thereby further improving the crushing effect of the crushing component 3 on the coal blocks.

[0034] The crushing assembly 3 includes a crushing roller 6, a first gear 7, a second gear 8, a third gear 9 and a first motor 10. A first movable groove is provided on the inner side of the side wall at one end of the crushing box 1. Crushing rollers 6 are rotatably connected to both sides of the top of the crushing box 1. One end of the crushing roller 6 close to the first movable groove extends to the inner side of the first movable groove, and the outer side of one end of the crushing roller 6 located on the inner side of the first movable groove is fixedly connected to the first gear 7. The second gear 8 and the third gear 9 are rotatably connected to the inner side of the first movable groove. The second gear 8 and the third gear 9 are located between the two first gears 7. The second gear 8 and the third gear 9 are meshingly connected, and the second gear 8 and the third gear 9 are respectively meshingly connected to the two first gears 7. The first motor 10 is fixedly connected to the outer side of the crushing box 1, and the output end of the first motor 10 extends to the inner side of the first movable groove and is fixedly connected to one of the crushing rollers 6.

[0035] By turning on the first motor 10, one of the crushing rollers 6 can be driven to rotate, thereby driving the first gear 7 fixedly connected to the crushing roller 6 to rotate synchronously. Through the meshing connection between the first gear 7, the second gear 8 and the third gear 9, one of the first gears 7 can be driven to rotate synchronously while the other first gear 7 is rotated, so that the two crushing rollers 6 can rotate synchronously inside the crushing box 1.

[0036] At the same time, by setting the second gear 8 and the third gear 9, the two first gears 7 can rotate in opposite directions, thereby driving the two crushing rollers 6 to rotate in opposite directions, thereby facilitating the two crushing rollers 6 to crush the coal blocks.

[0037] By cooperating with the anti-blocking component 4 and the structure in the above-mentioned embodiment, it is achieved that after the coal blocks are crushed, the broken coal can be shielded in the falling process, thereby slowing down the speed at which the broken coal falls to the bottom of the device and reducing the accumulation of broken coal, thereby reducing the phenomenon of broken coal with excessive humidity blocking the discharge port.

[0038] like Figure 5-Figure 7 As shown, the anti-blocking component 4 includes a rotating seat 11, a baffle plate 12, a first right-angle plate 13 and a connecting spring 14. The inner side walls at both ends of the crushing box 1 are fixedly connected to two rotating seats 11, and each two rotating seats 11 are arranged as a group, and the heights of the two groups of rotating seats 11 are different. Shielding plates 12 are arranged at both ends of the inner side of the crushing box 1, and the shielding plates 12 are rotatably connected to each group of rotating seats 11. The bottom of the baffle plate 12 away from the rotating seat 11 is fixedly connected to the first right-angle plate 13, and the two sides of the bottom of the baffle plate 12 close to the rotating seat 11 are fixedly connected to the connecting spring 14, and the connecting spring 14 is inclined, and the end of the connecting spring 14 away from the baffle plate 12 is fixedly connected to the inner side wall of the crushing box 1.

[0039] The anti-blocking assembly 4 also includes a first rotating rod 15, a toggle plate 16, a transmission belt 17 and a second motor 18. Both ends of the inner side of the crushing box 1 are rotatably connected to the first rotating rod 15, and the first rotating rods 15 are arranged below the baffle plate 12. The outer side of the first rotating rod 15 is fixedly connected with a plurality of toggle plates 16 in a circular array, and the toggle plates 16 are toggle-matched with the first right-angle plate 13. A second movable groove is provided on the inner side of the side wall of one side of the crushing box 1, and the side of the first rotating rod 15 close to the second movable groove extends to the inner side of the second movable groove. A transmission belt 17 is provided on the inner side of the second movable groove, and the transmission belt 17 wraps the two first rotating rods 15 and is arranged on the outer side of the inner side of the second movable groove, and the transmission belt 17 has a transmission effect on the two first rotating rods 15. The outer side of the crushing box 1 close to the second movable groove is fixedly connected to the second motor 18, and the output end of the second motor 18 extends to the inner side of the second movable groove and is fixedly connected to one of the first rotating rods 15.

[0040] The anti-blocking component 4 also includes a first fixed plate 19, a guide inclined plate 20, a second fixed plate 21, a second rotating rod 22, a transmission belt 23 and a third motor 24. The first fixed plate 19 is fixedly connected to both ends of the inner side of the bottom of the crushing box 1, and the first fixed plate 19 extends to the outer side of the bottom of the crushing box 1 through the discharge port. The first fixed plate 19 is located at the top of the inner side of the bottom of the crushing box 1 and is fixedly connected to the guide inclined plate 20, and the two guide inclined plates 20 are inclined. The first fixed plate 19 is located at both ends of the outer side of the bottom of the crushing box 1 and is fixedly connected to the second fixed plate 21. The second rotating rod 22 is rotatably connected to both sides between the two first fixed plates 19. The transmission belt 23 is wrapped around the outside of the two second rotating rods 22, and the transmission belt 23 plays a transmission role for the two second rotating rods 22. One end of one of the first fixed plates 19 located on the outside of the crushing box 1 is fixedly connected to the third motor 24, and the output end of the third motor 24 passes through the first fixed plate 19 and the corresponding second fixed plate 21 and is fixedly connected to the corresponding second rotating rod 22.

[0041] When the crushed coal falls through the gap between the two crushing rollers 6, it will first fall to the top of the shielding plate 12 located above. The setting of the first right-angle plate 13 can pull the shielding plate 12. At the same time, the inclined setting of the first right-angle plate 13 can make the shielding plate 12 also inclined, so that the crushed coal can slide down from the surface of the shielding plate 12 located above and fall to the surface of the shielding plate 12 located below, so that the crushed coal can be stopped for a second time, further slowing down the speed of the crushed coal falling, and then the crushed coal can pass through the shielding plate 12 located below and fall to the top of the conveyor belt 23;

[0042] At the same time, by turning on the second motor 18, one of the first rotating rods 15 can be driven to rotate, thereby driving the multiple toggle plates 16 outside the first rotating rod 15 to move synchronously, and at the same time, the toggle plates 16 cooperate with the toggle of the first right-angle plate 13 to move the first right-angle plate 13, thereby driving the shielding plate 12 fixedly connected to the first right-angle plate 13 to move synchronously;

[0043] By continuously toggling the first right-angle plate 13 through the multiple toggling plates 16, the surface of the shielding plate 12 can be shaken, thereby reducing the residual coal fragments on the top of the shielding plate 12. At the same time, the elastic setting of the connecting spring 14 can further enhance the shaking effect of the shielding plate 12.

[0044] The two guide inclined plates 20 can guide the crushed coal at the lower inner side of the crushing box 1, and can also collect and guide the crushed coal that is shaken and broken by the shielding plate 12, and make the crushed coal fall to the top of the conveyor belt 23;

[0045] After the crushed coal falls to the top of the conveyor belt 23 through the baffle plate 12 below, by turning on the third motor 24, one of the second rotating rods 22 can be driven to rotate, and then the conveyor belt 23 can be driven to rotate around the two second rotating rods 22 through the support setting of the two second rotating rods 22, and the crushed coal on the top of the conveyor belt 23 can be moved to the outside of the crushing box 1, so as to facilitate the staff to collect the crushed coal and other subsequent operations.

[0046] By cooperating with the shielding component 5 and the structure in the above embodiment, a shielding effect can be achieved on the feed port, thereby preventing coal slag from popping out during the coal crushing process, and at the same time causing a squeezing effect on the coal blocks at the feed port, thereby further improving the efficiency of coal block crushing.

[0047] like Figure 8 As shown, the shielding assembly 5 includes a first support plate 25, a third rotating rod 26 and a second right-angle plate 27. The first support plates 25 are fixedly connected to both sides of the outer ends of the top of the crushing box 1, and the inner sides of every two first support plates 25 are rotatably connected to the third rotating rod 26. The outer sides of the third rotating rod 26 are fixedly connected to the second right-angle plates 27, and the tops of the second right-angle plates 27 have a shielding effect on the top of the feed port 2.

[0048] The shielding assembly 5 also includes a double-headed motor 28, a fourth rotating rod 29, a second support plate 30 and a bevel gear set 31. The double-headed motor 28 is fixedly connected to the middle part of the outer side of the top of the crushing box 1, and the output ends at both ends of the double-headed motor 28 are fixedly connected to the fourth rotating rod 29. The outer side of the fourth rotating rod 29 away from the end of the double-headed motor 28 is rotatably connected to the second support plate 30, and the second support plate 30 is fixedly connected to the outer side of the crushing box 1. The outer side of the fourth rotating rod 29 away from the end of the double-headed motor 28 is provided with a bevel gear set 31, and the fourth rotating rod 29 drives the third rotating rod 26 to rotate through the bevel gear set 31.

[0049] By turning on the double-headed motor 28, the two fourth rotating rods 29 can be driven to rotate, and the second supporting plates 30 can provide support for the fourth rotating rods 29.

[0050] Through the setting of the bevel gear set 31, the two third rotating rods 26 at both ends of the crushing box 1 can be driven to rotate synchronously while the fourth rotating rod 29 rotates, thereby driving the second right-angle plate 27 fixedly connected to the third rotating rod 26 to flip, and making the top of the second right-angle plate 27 close to the top of the feed port 2, so as to achieve the effect of shielding the flying coal blocks, and at the same time, it can also squeeze the coal blocks beyond the top of the feed port 2, further improving the crushing effect of the crushing assembly 3.

Claims

1. A coal crusher anti-blocking device, comprising a crushing box, characterized in that: The top of the crushing box is fixedly connected with a feed port, the top of the inner side of the crushing box is equipped with a crushing assembly, the bottom of the inner side of the crushing box is equipped with an anti-blocking assembly, the bottom of the crushing box is provided with a discharge port, and the bottom of the anti-blocking assembly extends through the discharge port to the outside of the bottom of the crushing box, and a shielding assembly is installed on the outside of the top of the crushing box; The crushing assembly includes a crushing roller, a first gear, a second gear, a third gear and a first motor. A first movable groove is provided on the inner side of the side wall at one end of the crushing box. Crushing rollers are rotatably connected to both sides of the top of the crushing box. One end of the crushing roller close to the first movable groove extends to the inner side of the first movable groove, and the outer side of one end of the crushing roller located on the inner side of the first movable groove is fixedly connected to the first gear. The second gear and the third gear are rotatably connected to the inner side of the first movable groove. The second gear and the third gear are located between the two first gears. The second gear and the third gear are meshingly connected, and the second gear and the third gear are respectively meshingly connected to the two first gears. The first motor is fixedly connected to the outer side of the crushing box, and the output end of the first motor extends to the inner side of the first movable groove and is fixedly connected to one of the crushing rollers.

2. A coal crusher anti-blocking device according to claim 1, characterized in that: The anti-blocking assembly includes a rotating seat, a baffle plate, a first right-angle plate and a connecting spring. The inner side walls at both ends of the crushing box are fixedly connected to two rotating seats, each two rotating seats are arranged in a group, and the heights of the two groups of rotating seats are different. Shield plates are arranged at both ends of the inner side of the crushing box, and the shield plates are rotatably connected to each group of rotating seats. The bottom of the baffle plate away from the rotating seat is fixedly connected to the first right-angle plate, and both sides of the baffle plate close to the bottom of the rotating seat are fixedly connected to connecting springs, and the connecting springs are arranged obliquely, and the end of the connecting spring away from the baffle plate is fixedly connected to the inner side wall of the crushing box.

3. A coal crusher anti-blocking device according to claim 2, characterized in that: The anti-blocking assembly also includes a first rotating rod, a toggle plate, a transmission belt and a second motor, both ends of the inner side of the crushing box are rotatably connected to the first rotating rod, the first rotating rod is arranged below the baffle plate, the outer side of the first rotating rod is fixedly connected to a plurality of toggle plates in a circular array, and the toggle plates are toggle-matched with the first right-angle plate, a second movable groove is opened on the inner side of the side wall of one side of the crushing box, the first rotating rod on the side close to the second movable groove extends to the inner side of the second movable groove, a transmission belt is arranged inside the second movable groove, and the transmission belt wraps the two first rotating rods and is arranged on the outer side of the inner side of the second movable groove, and the transmission belt has a transmission effect on the two first rotating rods, the outer side of the crushing box close to the second movable groove is fixedly connected to the second motor, and the output end of the second motor extends to the inner side of the second movable groove and is fixedly connected to one of the first rotating rods.

4. A coal crusher anti-blocking device according to claim 3, characterized in that: The anti-blocking assembly also includes a first fixed plate, a guide inclined plate, a second fixed plate, a second rotating rod, a transmission belt and a third motor, wherein both ends of the inner side of the bottom of the crushing box are fixedly connected to the first fixed plate, and the first fixed plate extends to the outer side of the bottom of the crushing box through the discharge port, the first fixed plate is located at the top of the inner side of the bottom of the crushing box and is fixedly connected to the guide inclined plate, and the two guide inclined plates are inclined, the first fixed plate is located at both ends of the outer side of the bottom of the crushing box and is fixedly connected to the second fixed plate, the two sides between the two first fixed plates are rotatably connected to the second rotating rod, the outer side of the two second rotating rods is wrapped with a transmission belt, and the transmission belt plays a transmission role for the two second rotating rods, one end of one of the first fixed plates located on the outer side of the crushing box is fixedly connected to the third motor, and the output end of the third motor passes through the first fixed plate and the corresponding second fixed plate and is fixedly connected to the corresponding second rotating rod.

5. The anti-blocking device for a coal crusher according to claim 1 is characterized in that: The shielding assembly includes a first support plate, a third rotating rod and a second right-angle plate. The first support plates are fixedly connected to both sides of the outer ends of the top of the crushing box, and the inner sides of every two first support plates are rotatably connected to the third rotating rods. The outer sides of the third rotating rods are fixedly connected to the second right-angle plates, and the tops of the second right-angle plates have a shielding effect on the top of the feed port.

6. A coal crusher anti-blocking device according to claim 5, characterized in that: The shielding assembly also includes a double-headed motor, a fourth rotating rod, a second support plate and a bevel gear group. The double-headed motor is fixedly connected to the middle part of the outer side of the top of the crushing box, and the output ends at both ends of the double-headed motor are fixedly connected to the fourth rotating rod. The outer side of the fourth rotating rod away from the end of the double-headed motor is rotatably connected to the second support plate, and the second support plates are fixedly connected to the outer side of the crushing box. A bevel gear group is arranged on the outer side of the fourth rotating rod away from the end of the double-headed motor, and the fourth rotating rod drives the third rotating rod to rotate through the bevel gear group.

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