Anti-blocking structure of fine crusher and fine crusher

Abstract

The utility model discloses an anti-blocking structure of a fine crusher and the fine crusher, the anti-blocking structure comprises a guide plate arranged on a material guide plane of a feeder, when the feeder swings to feed, the guide plate guides and disperses materials to be crushed along the length direction of the material guide plane, so that the materials are prevented from being accumulated and blocked; the scrapers are connected to the two side faces of the feeder in the swinging direction, protrude out of the arc-shaped face of the feeder, are close to the inner wall of the feeding part of the box body and shield a gap between the feeder and the inner wall of the feeding part of the box body. According to the scheme, the guide plate is arranged on the guide plane of the feeder, and materials are guided and dispersed through the guide plate, so that the materials uniformly enter the crushing part of the box body, and the materials are prevented from being accumulated and blocked at the feeding part of the box body; the scrapers are arranged on the two side faces of the feeder in the swinging direction, the scrapers are used for shielding, the situation that materials enter a gap between the feeder and the inner wall of the feeding part of the box body to cause blockage, and the feeder is stuck is avoided, and normal operation of the feeder can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of crushers, in particular to a material anti-blocking structure and a fine crusher for a fine crusher. Background Technique

[0002] In the current market, for a single-shaft fine crusher, the feeder swings reciprocally inside the feeding part of the box body to send the material to be crushed to the crushing part of the box body. Under different crushing scenarios and complex and diverse material conditions, the material accumulates inside the feeding part of the box body, resulting in the material entering the gap between the feeder and the inner wall of the feeding part of the box body, thus causing material blockage, leading to the abnormal operation of the feeder of the fine crusher. It is necessary to stop the equipment operation and manually enter the equipment to dig out the material and remove the blocked material, which seriously affects the output of the equipment. Moreover, manual material digging is time-consuming and laborious, increasing both the equipment operation cost and affecting the equipment output. Content of the Utility Model

[0003] The utility model provides a material anti-blocking structure and a fine crusher for a fine crusher. By arranging a diversion plate on the material guiding plane of the feeder, the material is diverted and dispersed by the diversion plate, so that the material enters the crushing part of the box body evenly, avoiding the accumulation and blockage of the material in the feeding part of the box body; scraping plates are arranged on both sides of the feeder in the swinging direction, and the scraping plates are used for shielding to prevent the material from entering the gap between the feeder and the inner wall of the feeding part of the box body to cause blockage, resulting in the jamming of the feeder, and can ensure the normal operation of the feeder.

[0004] To solve the above technical problems, the technical solution of the utility model is as follows:

[0005] A material anti-blocking structure for a fine crusher provided by the utility model includes:

[0006] A diversion plate arranged on the material guiding plane of the feeder. When the feeder swings to feed, the diversion plate diverts and disperses the material to be crushed along the length direction of the material guiding plane, avoiding the accumulation and blockage of the material.

[0007] Scraping plates connected to both sides of the feeder in the swinging direction. The scraping plates protrude from the arc surface of the feeder close to the inner wall of the feeding part of the box body and shield the gap between the feeder and the inner wall of the feeding part of the box body.

[0008] Optionally, the diversion plate is arranged in the middle of the feeding direction of the material guiding plane of the feeder, and the diversion plate is a diversion triangular plate with a certain height protruding in the middle and presenting a certain angle distribution.

[0009] Optionally, the material anti-blocking structure of the fine crusher further includes:

[0010] Threaded connection holes formed on both sides of the feeder in the swinging direction;

[0011] A kidney-shaped groove formed on the surface of the scraper, the kidney-shaped groove corresponding to the connecting threaded hole, and the kidney-shaped groove extending towards the inner wall of the feeding part of the box body;

[0012] A connecting bolt, the end of the connecting bolt passing through the kidney-shaped groove and being threadedly connected to the connecting threaded hole.

[0013] Optionally, the scraper is composed of multiple splicing plates butt-jointed, and at least two kidney-shaped grooves are provided on each splicing plate.

[0014] The present utility model also provides a fine crusher, including:

[0015] The anti-blocking structure of the above-mentioned fine crusher;

[0016] A discharge port formed through the feeding part of the box body;

[0017] A discharge door rotatably installed on the outer side of the feeding part of the box body, the discharge door corresponding to the discharge port;

[0018] An oil cylinder for driving the discharge door to rotate, the output end of the oil cylinder being rotatably connected to the outer side of the discharge door, and the discharge door being rotated into or out of the discharge port by the oil cylinder to seal or open the discharge port;

[0019] The inner side of the discharge door has an arc-shaped surface structure, and the radian of the inner side of the discharge door is adapted to the radian of the inner wall of the feeding part of the box body;

[0020] When the discharge door enters the discharge port under the drive of the oil cylinder to seal the discharge port, the inner side of the discharge door is flush with the inner wall of the feeding part of the box body.

[0021] Optionally, the fine crusher further includes:

[0022] A sleeve connected to the outer side of the discharge door, the sleeve extending along the length direction of the discharge door;

[0023] A rotating shaft fixedly arranged on the outer side of the feeding part of the box body, there are two rotating shafts, and the two rotating shafts are respectively inserted into both ends of the sleeve, and the rotating shaft is rotatably connected to the sleeve.

[0024] Optionally, the fine crusher further includes:

[0025] A connecting ear plate connected to the outer side of the discharge door, the connecting ear plate being rotatably connected to the output end of the oil cylinder through a pin shaft.

[0026] Optionally, two sets of connecting lugs are provided, and the two sets of connecting lugs are respectively close to both sides of the length direction of the discharge door; two oil cylinders are provided, and the two oil cylinders are respectively rotatably connected to the two connecting lugs.

[0027] Optionally, the fine crusher further includes:

[0028] A reinforcing plate connected to the outer side surface of the discharge door.

[0029] Optionally, the fine crusher further includes:

[0030] A limiting plate detachably connected to the outer side surface of the feeding part of the box body by bolts, the limiting plate extends towards the opening end of the discharge door, and the limiting plate abuts against the outer side surface of the discharge door.

[0031] The above solution of the present invention has at least the following beneficial effects:

[0032] In the above solution of the present invention, by arranging a diversion plate on the material guiding plane of the feeder, the material is diverted and dispersed by the diversion plate, so that the material enters the crushing part of the box body evenly, avoiding the accumulation and blockage of the material in the feeding part of the box body; scraping plates are arranged on both side surfaces in the swinging direction of the feeder, and the scraping plates are used for blocking to prevent the material from entering the gap between the feeder and the inner wall of the feeding part of the box body to cause blockage, which may cause the feeder to be stuck, and can ensure the normal operation of the feeder. Description of the Drawings

[0033] Figure 1 is a schematic structural diagram of the anti-blocking structure of the fine crusher provided by the embodiment of the present invention;

[0034] Figure 2 is Figure 1 an enlarged schematic view of part A;

[0035] Figure 3 is a schematic structural diagram of the diversion plate in the anti-blocking structure of the fine crusher provided by the embodiment of the present invention;

[0036] Figure 4 is a schematic structural diagram of the inner side surface of the discharge door in the fine crusher provided by the embodiment of the present invention;

[0037] Figure 5 is a schematic structural diagram of the outer side surface of the discharge door in the fine crusher provided by the embodiment of the present invention;

[0038] Figure 6 is a schematic installation structure diagram of the discharge door in the fine crusher provided by the embodiment of the present invention;

[0039] Figure 7It is a schematic structural diagram of the opening state of the discharge door in the fine crusher provided by the embodiment of the present utility model.

[0040] The description of the reference numerals is as follows:

[0041] 1. Feeder; 11. Guide plane; 2. Deflector; 3. Discharge door; 31. Sleeve; 32. Connecting ear plate; 33. Reinforcing plate; 4. Oil cylinder; 5. Box body crushing part; 6. Box body feeding part; 7. Scraper; 8. Limiting plate; 9. Rotating shaft. Detailed implementation manners

[0042] Hereinafter, exemplary embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0043] As Figures 1-3 shown, the present utility model provides an anti-blocking structure for a fine crusher, including:

[0044] A deflector 2 provided on the guide plane 11 of the feeder 1. When the feeder 1 swings for feeding, the deflector 2 guides and disperses the material to be crushed along the length direction of the guide plane 11 to avoid material accumulation and blockage;

[0045] Scrapers 7 connected to both side surfaces in the swinging direction of the feeder 1. The scrapers 7 protrude from the arc surface of the feeder 1 and are close to the inner wall of the box body feeding part 6 to block the gap between the feeder 1 and the inner wall of the box body feeding part 6.

[0046] In this embodiment, the material to be crushed enters the inside of the box body feeding part 6, and the feeder 1 swings inside the box body feeding part 6. When the feeder 1 swings inside the box body feeding part 6 along Figure 7When swinging towards the highest point in the X direction, as the feeder 1 swings, the material slides down under the action of gravity to the guiding plane 11. The guiding plate 2 on the guiding plane 11 guides and disperses the material to be crushed, so that the material to be crushed is evenly distributed along the length direction of the guiding plane 11, which can reduce the feeding burden of the feeder 1, thereby preventing the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6, and reducing the occurrence of material accumulation and blockage. During the process of the feeder 1 swinging to the highest point, the material to be crushed breaks away from the guiding plane 11 and the guiding plate 2 under the action of gravity and enters the inside of the box body crushing part 5 for crushing; by guiding and evenly dispersing the material to be crushed through the guiding plate 2, the feeding burden of the feeder 1 can be reduced, thereby preventing the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6, reducing the occurrence of material accumulation and blockage, ensuring the normal feeding, and at the same time helping to improve the material crushing effect;

[0047] By using the scraping plate 7 to block the gap between the feeder 1 and the inner wall of the box body feeding part 6, during the feeding process of the feeder, it can prevent the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6 and reduce the occurrence of material blockage; specifically: when the feeder 1 swings towards the highest point in the X direction inside the box body feeding part 6, the scraping plate 7 far from the box body crushing part 5 blocks the material, preventing the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6 and causing blockage. Through the scraping plate 7, the material can be directly moved to the guiding plane 11 of the feeder 1 and be guided and dispersed by the guiding plate 2; when the feeder 1 swings towards the lowest point in the X direction inside the box body feeding part 6, the scraping plate 7 close to the box body crushing part 5 can push the material remaining on the inner wall of the box body feeding part 6 into the inside of the box body crushing part 5, preventing the material remaining on the inner wall of the box body feeding part 6 from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6 and causing blockage; by using the scraping plate 7 to block the gap between the feeder 1 and the inner wall of the box body feeding part 6, it can effectively prevent the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6, thereby avoiding the feeder 1 being stuck due to material blockage and ensuring the normal operation of the feeder 1. Figure 7 When swinging towards the highest point in the X direction, as the feeder 1 swings, the material slides down under the action of gravity to the guiding plane 11. The guiding plate 2 on the guiding plane 11 guides and disperses the material to be crushed, so that the material to be crushed is evenly distributed along the length direction of the guiding plane 11, which can reduce the feeding burden of the feeder 1, thereby preventing the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6, and reducing the occurrence of material accumulation and blockage. During the process of the feeder 1 swinging to the highest point, the material to be crushed breaks away from the guiding plane 11 and the guiding plate 2 under the action of gravity and enters the inside of the box body crushing part 5 for crushing; by guiding and evenly dispersing the material to be crushed through the guiding plate 2, the feeding burden of the feeder 1 can be reduced, thereby preventing the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6, reducing the occurrence of material accumulation and blockage, ensuring the normal feeding, and at the same time helping to improve the material crushing effect; Figure 7 When swinging towards the lowest point in the X direction inside the box body feeding part 6, the scraping plate 7 close to the box body crushing part 5 can push the material remaining on the inner wall of the box body feeding part 6 into the inside of the box body crushing part 5, preventing the material remaining on the inner wall of the box body feeding part 6 from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6 and causing blockage; by using the scraping plate 7 to block the gap between the feeder 1 and the inner wall of the box body feeding part 6, it can effectively prevent the material from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6, thereby avoiding the feeder 1 being stuck due to material blockage and ensuring the normal operation of the feeder 1.

[0048] As Figure 1 and Figure 3 shown, in an alternative embodiment of the present invention, the guiding plate 2 is arranged in the middle of the feeding direction of the guiding plane 11 of the feeder 1, and the guiding plate 3 is a guiding triangular plate with a certain height protruding in the middle and presenting a certain angular distribution.

[0049] In this embodiment, the deflector 3 adopts the above structure, which can deflect and evenly disperse the material to be broken by the deflector 2, so that the material to be broken is evenly distributed along the length direction of the material guiding plane 11, reducing the feeding burden of the feeder 1, avoiding material accumulation and blockage, and ensuring smooth feeding. At the same time, since the length direction of the material guiding plane 11 is consistent with the axial direction of the rotor of the crusher, the evenly dispersed material can enter the crushing part 5 of the box body and fully and evenly contact with the rotor of the crusher, thus helping to improve the material crushing effect.

[0050] As Figure 3 shown, in an alternative embodiment of the present invention, the anti-blocking structure of the fine crusher further includes:

[0051] Connecting threaded holes formed on both side surfaces in the swinging direction of the feeder 1;

[0052] Waist-shaped grooves formed on the surface of the scraper 7, the waist-shaped grooves corresponding to the connecting threaded holes and extending towards the inner wall of the box body feeding part 6;

[0053] Connecting bolts, the ends of the connecting bolts passing through the waist-shaped grooves and being threadedly connected to the connecting threaded holes.

[0054] In this embodiment, the position of the scraper 7 can be adjusted through the waist-shaped grooves and the connecting bolts, so as to adjust the distance between the scraper 7 and the inner wall of the box body feeding part 6, ensuring that the scraper 7 can fully cover the gap between the feeder 1 and the inner wall of the box body feeding part 6, preventing materials from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6 and causing blockage, which may lead to the jamming of the feeder 3 and ensuring the normal operation of the feeder 1.

[0055] As Figure 3 shown, in an alternative embodiment of the present invention, the scraper 7 is composed of multiple splicing plates butt-jointed, and at least two waist-shaped grooves are provided on each splicing plate.

[0056] In this embodiment, the scraper 7 is composed of multiple splicing plates butt-jointed, which is convenient for segmentally adjusting the position of the scraper 7, ensuring that the scraper 7 can fully cover the gap between the feeder 1 and the inner wall of the box body feeding part 6, and preventing materials from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6 and causing blockage;

[0057] By providing at least two waist-shaped grooves on the splicing plates, the installation stability of the splicing plates can be ensured, thereby ensuring the stability of the scraper 7, enabling the scraper 7 to fully cover the gap between the feeder 1 and the inner wall of the box body feeding part 6, and preventing materials from entering the gap between the feeder 1 and the inner wall of the box body feeding part 6 and causing blockage.

[0058] As Figure 1 and Figures 4-7 shown, the present invention also provides a fine crusher, including:

[0059] The anti-blocking structure of the fine crusher described above;

[0060] The discharge port penetrating and formed on the feed part 6 of the box body;

[0061] The discharge door 3 rotatably installed on the outer side of the feed part 6 of the box body, and the discharge door 3 corresponds to the discharge port;

[0062] The oil cylinder 4 used to drive the discharge door 3 to rotate, the output end of the oil cylinder 4 is rotatably connected to the outer side of the discharge door 3, and the discharge door 3 is screwed into or out of the discharge port under the drive of the oil cylinder 4 to seal or open the discharge port;

[0063] The inner side of the discharge door 3 is of an arc surface structure, and the radian of the inner side of the discharge door 3 is adapted to the radian of the inner wall of the feed part 6 of the box body;

[0064] When the discharge door 3 enters the discharge port under the drive of the oil cylinder 4 to seal the discharge port, the inner side of the discharge door 3 is flush with the inner wall of the feed part 6 of the box body.

[0065] In this embodiment, when feeding and crushing are carried out normally, the output end of the oil cylinder 4 drives the discharge door 3 to rotate along Figure 7 the direction Y in

[0066] towards the feeder 1, so that the discharge door 3 is screwed into the discharge port to seal the discharge port. At this time, the inner side of the discharge door 3 is flush with the inner wall of the feed part 6 of the box body, and the feeder 1 swings for feeding; Figure 7 When materials enter the gap between the feeder 1 and the inner wall of the feed part 6 of the box body, or when materials enter the gap between the feeder 1 and the inner side of the discharge door 3, causing blockage and affecting the normal operation of the feeder 1, the output end of the oil cylinder 4 drives the discharge door 3 to rotate along

[0067] the direction Y in

[0068] away from the feeder 1, and the movable end of the discharge door 3 is screwed out of the discharge port to open the discharge port, so as to discharge the materials that enter the gap between the feeder 1 and the inner wall of the feed part 6 of the box body, or enter the gap between the feeder 1 and the inner side of the discharge door 3, thereby solving the blockage problem; Figure 5 and Figure 6 As shown in

[0069] a sleeve 31 connected to the outer side of the discharge door 3, and the sleeve 31 extends along the length direction of the discharge door 3;

[0070] A rotating shaft 9 is fixedly arranged on the outer side of the box feeding part 6 . Two rotating shafts 9 are arranged, and the two rotating shafts 9 are respectively inserted into the two ends of the sleeve 31 , and the rotating shaft 9 is rotatably connected to the sleeve 31 .

[0071] In this embodiment, the rotation connection of the discharge door 3 is achieved by the rotation connection between the rotating shaft 9 and the sleeve 31, which ensures that the oil cylinder 4 drives the discharge door 3 to rotate smoothly while ensuring the strength of the discharge door 3.

[0072] In an optional embodiment of the present invention, the fine crusher further comprises:

[0073] A connecting ear plate 32 is connected to the outer side of the discharge door 3, and the connecting ear plate 32 is rotatably connected to the output end of the oil cylinder 4 through a pin shaft.

[0074] In this embodiment, the discharging door 3 is rotatably connected to the output end of the oil cylinder 4 by connecting the ear plate 32 in cooperation with the pin, ensuring that the oil cylinder 4 can accurately drive the discharging door 3 to rotate, thereby achieving the sealing and opening of the discharging port.

[0075] like Figure 5 and Figure 6 As shown, in an optional embodiment of the utility model, two groups of connecting ear plates 32 are provided, and the two groups of connecting ear plates 32 are respectively close to both sides of the length direction of the discharge door 3; two oil cylinders 4 are provided, and the two oil cylinders 4 are rotatably connected to the two connecting ear plates 32 respectively.

[0076] In this embodiment, the above structure is adopted to make the discharge door 3 evenly stressed, ensuring that the oil cylinder 4 drives the discharge door 3 to rotate accurately; at the same time, the discharge door 3 is supported by the two oil cylinders 4 to ensure the strength of the discharge door 3.

[0077] like Figure 5 As shown, in an optional embodiment of the utility model, the fine crusher also includes:

[0078] A reinforcing plate 33 connected to the outer side of the discharge door 3 .

[0079] In this embodiment, by providing a reinforcing plate 33 on the outer side of the discharge door 3 , the strength of the discharge door 3 can be further improved.

[0080] like Figure 1 and Figure 2 As shown, in an optional embodiment of the utility model, the fine crusher also includes:

[0081] The limit plate 8 is detachably connected to the outer side surface of the box feed part 6 by bolts, and the limit plate 8 extends toward the open end of the discharge door 3, and the limit plate 8 abuts against the outer side surface of the discharge door 3.

[0082] In this embodiment, when feeding and crushing are carried out normally, the limiting plate 8 is installed on the outer side of the feeding part 6 of the box body through bolts, so that the limiting plate 8 abuts against the outer side of the discharge door 3. The movable end of the discharge door 3 is supported and limited by the limiting plate 8 to prevent the discharge door 3 from opening due to the failure of the oil cylinder 4. When material blockage occurs and the discharge door 3 needs to be opened, the limiting plate 8 is removed to release the support and limit of the limiting plate 8 on the discharge door 3, which facilitates the oil cylinder 4 to drive the movable end of the discharge door 3 to rotate out of the discharge port, realizing the opening of the discharge port, and thus discharging the blocked material.

[0083] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An anti-blocking structure for a fine crusher, characterized in that: Comprising: A diversion plate (2) arranged on the material guiding plane (11) of the feeder (1). When the feeder (1) swings for feeding, the diversion plate (2) guides and disperses the material to be crushed along the length direction of the material guiding plane (11), avoiding material accumulation and blockage. Scrapers (7) connected to both side surfaces in the swinging direction of the feeder (1). The scrapers (7) protrude from the arc surface of the feeder (1) close to the inner wall of the feeding part (6) of the box body and block the gap between the feeder (1) and the inner wall of the feeding part (6) of the box body.

2. The anti-blocking structure of the fine crusher according to claim 1, characterized in that, The diversion plate (2) is arranged in the middle of the feeding direction of the material guiding plane (11) of the feeder (1). The diversion plate (2) is a diversion triangular plate with a certain height protruding in the middle and presenting a certain angular distribution.

3. The anti-blocking structure of the fine crusher according to claim 1, characterized in that, Further comprising: Connecting threaded holes formed on both side surfaces in the swinging direction of the feeder (1); Waist-shaped grooves formed on the surface of the scraper (7). The waist-shaped grooves correspond to the connecting threaded holes and extend towards the inner wall of the feeding part (6) of the box body; Connecting bolts, the ends of which penetrate through the waist-shaped grooves and are threadedly connected to the connecting threaded holes.

4. The anti-blocking structure of the fine crusher according to claim 3, characterized in that, The scraper (7) is composed of multiple splicing plates butt-jointed. There are at least two waist-shaped grooves on each splicing plate.

5. A fine crusher, characterized in that, Comprising: The anti-blocking structure of the fine crusher according to any one of claims 1 to 4; A discharge port formed through the feeding part (6) of the box body; A discharge door (3) rotatably installed on the outer side surface of the feeding part (6) of the box body. The discharge door (3) corresponds to the discharge port; An oil cylinder (4) for driving the discharge door (3) to rotate. The output end of the oil cylinder (4) is rotatably connected to the outer side surface of the discharge door (3). The discharge door (3) is driven by the oil cylinder (4) to rotate into or out of the discharge port to seal or open the discharge port; The inner side surface of the discharge door (3) is of an arc surface structure, and the radian of the inner side surface of the discharge door (3) is adapted to the radian of the inner wall of the feeding part (6) of the box body; When the discharge door (3) enters the discharge port under the drive of the oil cylinder (4) to seal the discharge port, the inner side surface of the discharge door (3) is flush with the inner wall of the feeding part (6) of the box body.

6. The fine crusher according to claim 5, wherein Further comprising: A sleeve (31) connected to the outer side surface of the discharge door (3), and the sleeve (31) extends along the length direction of the discharge door (3); A rotating shaft (9) fixedly arranged on the outer side surface of the feeding part (6) of the box body. There are two rotating shafts (9), and the two rotating shafts (9) are respectively inserted into both ends of the sleeve (31), and the rotating shaft (9) is rotatably connected to the sleeve (31).

7. The fine crusher according to claim 6, characterized in that Further comprising: A connecting ear plate (32) connected to the outer side surface of the discharge door (3), and the connecting ear plate (32) is rotatably connected to the output end of the oil cylinder (4) through a pin shaft.

8. The fine crusher according to claim 7, characterized in that There are two sets of the connecting lugs (32), and the two sets of connecting lugs (32) are respectively close to both sides of the length direction of the discharge door (3); there are two oil cylinders (4), and the two oil cylinders (4) are respectively rotatably connected to the two connecting lugs (32).

9. The fine crusher according to claim 5, wherein, It further includes: A reinforcing plate (33) connected to the outer side surface of the discharge door (3).

10. The fine crusher according to claim 5, characterized in that, It further includes: A limiting plate (8) detachably connected to the outer side surface of the feeding part (6) of the box body by bolts, the limiting plate (8) extends towards the opening end of the discharge door (3), and the limiting plate (8) abuts against the outer side surface of the discharge door (3).

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