Crushing equipment capable of changing speed through reverse rotation

Abstract

The utility model discloses a counter-rotating speed-changing crushing device, and aims to provide a counter-rotating speed-changing crushing device which is favorable for improving the crushing effect, and comprises a rack, a crushing cylinder body is connected to the rack, a feeding hole is formed in the front side of the crushing cylinder body, a driving structure is arranged on the rear side of the crushing cylinder body, and the driving structure is detachably connected with the crushing cylinder body; a first cutter head, a second cutter head and an annular filter screen are arranged in the smashing cylinder, the first cutter head is located on the side face of the second cutter head, the first cutter head is rotationally connected with the smashing cylinder in the forward direction under driving of a driving structure, and the second cutter head is rotationally connected with the smashing cylinder in the reverse direction under driving of the driving structure. The two ends of the filter screen are detachably connected with the front side and the rear side of the smashing barrel respectively, the first cutter head, the second cutter head and the feeding port are all located in the filter screen, and a discharging port corresponding to the filter screen is formed in the bottom of the smashing barrel. The crushing device has the beneficial effects that the purpose of improving the crushing effect is achieved, and the crushing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field related to pulverizers, in particular to a pulverizing device with reverse speed change. Background Art

[0002] A crusher is a commonly used machine in production and life. It drives the internal crushing mechanism through a motor to cut and crush various herbs, woody plants, Chinese medicinal materials, minerals and other processing objects.

[0003] The Chinese patent number is CN2378121Y, and the announcement date is May 17, 2000. It discloses a claw type crusher, which includes a body, a circular crushing chamber in the body, a feed hopper and a discharge hopper connected to the crushing chamber, an annular screen in the crushing chamber, a disc-shaped fixed tooth plate arranged coaxially with the annular screen, and a rotor plate connected to the power machine transmission, the columnar fixed teeth on the fixed tooth plate and the columnar moving teeth on the rotor plate are matched with each other, and the characteristic is that the cross section of the above-mentioned moving teeth is an N-gon.

[0004] It can be seen from the above patents that most of the claw type grinders in the prior art use a certain cutter disc (i.e., rotor disc) and a moving cutter disc (i.e., fixed tooth disc) to crush raw materials such as cereals, Chinese herbal medicines, plastics, and rubber, and the crushing effect is poor and the crushing efficiency is low. Utility Model Content

[0005] The utility model aims to overcome the shortcomings of the prior art that the pulverizer has a poor pulverizing effect and provides a pulverizing device with a reverse speed change which is beneficial to improving the pulverizing effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A reverse speed pulverizing device, which comprises a frame, a pulverizing cylinder connected to the frame, a feed port being arranged on the front side of the pulverizing cylinder, a driving structure being arranged on the rear side of the pulverizing cylinder, the driving structure being detachably connected to the pulverizing cylinder, a cutter disc 1, a cutter disc 2 and an annular filter being arranged in the pulverizing cylinder respectively, the cutter disc 1 being located on the side of the cutter disc 2, the cutter disc 1 being connected to the pulverizing cylinder in a forward rotation under the drive of the driving structure, the cutter disc 2 being connected to the pulverizing cylinder in a reverse rotation under the drive of the driving structure, the two ends of the filter being detachably connected to the front and rear sides of the pulverizing cylinder respectively, the cutter disc 1, the cutter disc 2 and the feed port being all located in the filter, and a discharge port corresponding to the filter being arranged at the bottom of the pulverizing cylinder.

[0008] The frame is connected with a crushing cylinder, a feed port is provided at the front side of the crushing cylinder, a driving structure is provided at the rear side of the crushing cylinder, the driving structure is detachably connected with the crushing cylinder, a knife disc 1, a knife disc 2 and an annular filter are provided in the crushing cylinder, the knife disc 1 is located at the side of the knife disc 2, the knife disc 1 is connected to the crushing cylinder in a forward rotation under the drive of the driving structure, the knife disc 2 is connected to the crushing cylinder in a reverse rotation under the drive of the driving structure, the two ends of the filter are detachably connected to the front and rear sides of the crushing cylinder, the knife disc 1, the knife disc 2 and the feed port are all located in the filter, and a discharge port corresponding to the filter is provided at the bottom of the crushing cylinder. The material to be crushed enters the crushing cylinder from the feed port, the driving structure drives the knife disc 1 to rotate forward and the knife disc 2 to rotate reversely, and the single moving knife disc structure is changed into a double moving knife disc structure, and the material is hit in the forward and reverse directions at the same time, so as to achieve the purpose of improving the crushing effect and improving the crushing efficiency; the crushed material is discharged from the discharge port through the filter for collection, so that the coarseness of the material meets the requirements.

[0009] Preferably, the driving structure includes a transmission shaft, a motor and a gear box, the transmission shaft passes through the rear center of the crushing cylinder, one end of the transmission shaft is located in the crushing cylinder and fixedly connected to the center of the cutter disc one, a connecting pipe is provided on the side wall of the cutter disc two, the connecting pipe is rotatably connected to the crushing cylinder, one end of the connecting pipe is located in the crushing cylinder and detachably connected to the center of the cutter disc two, the other end of the connecting pipe passes through the rear side of the crushing cylinder and is located in the gear box, and a plurality of obliquely arranged convex teeth are provided on the outer side of the connecting pipe, the plurality of convex teeth are evenly distributed along the circumference of the connecting pipe to form a bevel gear one, the gear box is detachably connected to the outer side of the crushing cylinder, The other end of the transmission shaft passes through the cutter disc 2 and the connecting pipe in sequence and is located in the gear box and fixed with the bevel gear 2. The other end of the transmission shaft is rotatably connected to one side of the gear box, and the transmission shaft is rotatably connected to the cutter disc 2 and the connecting pipe respectively. A bevel gear 3 is provided on the other side of the gear box, which is meshed with the bevel gear 1 and the bevel gear 2 respectively. The motor is detachably connected to the frame, and the output end of the motor is connected to the bevel gear 3. Driven by the motor, the transmission shaft drives the cutter disc 1 to rotate forward through the meshing of the bevel gear 3 and the bevel gear 2. Driven by the motor, the connecting pipe drives the cutter disc 2 to rotate reversely through the meshing of the bevel gear 3 and the bevel gear 1. When the driving structure is working, the motor drives the bevel gear three to rotate, and the bevel gear three is respectively meshed with the bevel gear one and the bevel gear two, so that the bevel gear one and the bevel gear two rotate in opposite directions. Since the bevel gear one is connected to the cutter disc two through the connecting pipe, and the bevel gear two is connected to the cutter disc one through the transmission shaft, the cutter disc one and the cutter disc two can be respectively rotated in the positive and negative directions through the control of only one motor, which is convenient to control and has a simple structure.

[0010] Preferably, a gear shaft is provided on the bevel gear three, the gear shaft is rotatably connected to the side wall of the gear box, one end of the gear shaft is fixedly connected to the bevel gear three and is located inside the crushing cylinder, and the other end of the gear shaft is located outside the crushing cylinder and is belt-drivenly connected to the output end of the motor. The bevel gear three is located inside the gear box and is conveniently connected to the output end of the external motor through the gear shaft for belt transmission.

[0011] Preferably, the shapes of the blade disc 1 and the blade disc 2 are both circular, and a plurality of groups of crushing components 1 are provided on the front and rear sides of the blade disc 1, and the plurality of groups of crushing components 1 are evenly distributed along the radial direction of the blade disc 1. The crushing component 1 includes a plurality of crushing shafts 1, and the plurality of crushing shafts 1 are evenly distributed in a circular shape with the center of the blade disc 1 as the center, and the crushing shaft 1 is fixedly connected to the blade disc 1, and a plurality of groups of crushing components 2 are provided on the front and rear sides of the blade disc 2, and the plurality of groups of crushing components 2 are evenly distributed along the radial direction of the blade disc 2 and are interspersed with the plurality of groups of crushing components 1. The crushing component 2 includes a plurality of crushing shafts 2, and the plurality of crushing shafts 2 are evenly distributed in a circular shape with the center of the blade disc 2 as the center, and the crushing shaft 2 is fixedly connected to the blade disc 2. Installing crushing shaft one on the front and rear sides of cutter disc one and installing crushing shaft two on the front and rear sides of cutter disc two is beneficial to achieving the use of positive and negative directions to strike the material under the opposite driving directions of cutter disc one and cutter disc two, which is beneficial to improving the crushing effect and crushing efficiency; at the same time, the distribution of crushing shaft one and crushing shaft two makes it possible to avoid interference when cutter disc one and cutter disc two are driven in opposite directions, which is beneficial to increasing the probability of material being struck in positive and negative directions, thereby improving the crushing effect and crushing efficiency.

[0012] Preferably, the shortest straight-line distance between the blade disc 1 and the blade disc 2 is less than the sum of the lengths of the crushing shaft 1 and the crushing shaft 2, so that the crushing shaft 1 and the crushing shaft 2 can intersect with each other, thereby increasing the probability of the material being struck in the forward and reverse directions, thereby facilitating the improvement of the crushing effect and efficiency.

[0013] Preferably, the cutter disc 1 and the cutter disc 2 are both provided with a plurality of feeding holes evenly distributed along the circumference thereof, and the crushing shaft 1 and the crushing shaft 2 are respectively located on the sides of the corresponding feeding holes. The feeding holes facilitate the passage of materials, so that the materials in the crushing cylinder can be crushed under the joint action of the crushing shaft 1 and the crushing shaft 2, and can also be fully stirred, which is conducive to improving the crushing effect and crushing efficiency.

[0014] Preferably, the front side of the crushing cylinder is provided with an inspection port connected to the interior thereof, the inspection port is provided with an inspection door, the feed port is located on the inspection door, the inspection door completely covers the inspection port, one side of the inspection door is rotatably connected to one side of the inspection port, a hand wheel is provided on the other side corresponding to the inspection port, the hand wheel is rotatably connected to the outer side wall of the crushing cylinder, and a locking port matching the hand wheel is provided on the other side corresponding to the inspection door. The cooperation between the hand wheel and the locking port facilitates the opening and closing of the inspection door, thereby facilitating the replacement and maintenance of the blade disc 1, blade disc 2 and the filter.

[0015] Preferably, the filter is in the shape of a circular ring, and the central axis of the filter is respectively in the same straight line with the central axis of the blade disc one and the central axis of the blade disc two, which is convenient for the rotation of the blade disc one and the blade disc two, and is beneficial to the full mixing and crushing of the material; one end of the filter is connected to the inspection port and is detachably connected to the side wall of the inspection port, and the other end of the filter is detachably connected to the rear side of the crushing cylinder, so that the material can be concentrated in the filter, which is convenient for the crushing of the blade disc one and the blade disc two, and is beneficial to improve the filtering effect and ensure a good coarseness and fineness of the material.

[0016] Preferably, a feed hopper with an opening at the top is provided at the feed inlet, one side of the feed hopper is detachably connected to the inspection door, the feed inlet is located at the bottom of one side of the feed hopper, and the other side of the feed hopper corresponding to the feed hopper is provided with a guide inclined surface that gradually approaches the feed inlet from the top of the feed hopper to its bottom. The structural design of the feed hopper facilitates the material to pass through the guide inclined surface and then enter the crushing cylinder, which is convenient for the material to be put in on the one hand, and helps to prevent the material from accumulating in the feed hopper on the other hand.

[0017] Preferably, a guide hopper is provided at the discharge port, the guide hopper is arranged obliquely, one end of the guide hopper is detachably connected to the discharge port, the other end of the guide hopper passes through the frame and is located at the front side of the frame, and the motor is detachably connected to the rear side of the frame. The guide hopper facilitates the discharge and collection of the crushed material.

[0018] The beneficial effects of the utility model are as follows: the material is struck in the forward and reverse directions at the same time, so as to achieve the purpose of improving the crushing effect and improving the crushing efficiency; the crushed material is discharged from the discharge port through the filter screen for collection, so that the coarseness and fineness of the material meets the requirements; the knife disc one and the knife disc two can be respectively rotated in the forward and reverse directions through the control of a motor, which is convenient to control and has a simple structure; the probability of striking the material in the forward and reverse directions is increased; it is convenient to replace and repair the knife disc one, the knife disc two and the filter screen; it is conducive to the full mixing and crushing of the material; the material can be concentrated in the filter screen, which is conducive to improving the filtering effect and ensuring the good coarseness and fineness of the material; the structural design of the feed hopper makes it easy for the material to pass through the guide inclined surface and then enter the crushing cylinder through the feed port, which is convenient for the material to be put in on the one hand, and is conducive to preventing the material from accumulating in the feed hopper on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model;

[0020] Figure 2 It is an exploded view of the utility model;

[0021] Figure 3 It is the front view of the utility model;

[0022] Figure 4 yes Figure 3 Sectional view of AA in the middle;

[0023] Figure 5 yes Figure 3 Right view of;

[0024] Figure 6 It is a structural schematic diagram of the gear box of the utility model after being exploded.

[0025] In the figure: 1. frame, 2. crushing cylinder, 3. feed port, 4. drive structure, 5. cutter disc 1, 6. cutter disc 2, 7. filter screen, 8. discharge port, 9. transmission shaft, 10. motor, 11. gear box, 12. connecting pipe, 13. bevel gear 1, 14. bevel gear 2, 15. bevel gear 3, 16. gear shaft, 17. crushing component 1, 18. crushing shaft 1, 19. crushing component 2, 20. crushing shaft 2, 21. feed hole, 22. inspection port, 23. inspection door, 24. hand wheel, 25. locking port, 26. feed hopper, 27. guide inclined surface, 28. guide hopper. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 In the described embodiment, a reverse speed pulverizing device comprises a frame 1, to which a pulverizing cylinder 2 is connected, a feed port 3 is arranged on the front side of the pulverizing cylinder 2, a driving structure 4 is arranged on the rear side of the pulverizing cylinder 2, the driving structure 4 is detachably connected to the pulverizing cylinder 2, a cutter disc 1 5, a cutter disc 2 6 and an annular filter screen 7 are arranged in the pulverizing cylinder 2, respectively, the cutter disc 1 5 is located on the side of the cutter disc 2 6, the cutter disc 1 5 is connected to the pulverizing cylinder 2 in a forward rotation under the drive of the driving structure 4, the cutter disc 2 6 is connected to the pulverizing cylinder 2 in a reverse rotation under the drive of the driving structure 4, the two ends of the filter screen 7 are detachably connected to the front and rear sides of the pulverizing cylinder 2, respectively, the cutter disc 1 5, the cutter disc 2 6 and the feed port 3 are all located in the filter screen 7, and a discharge port 8 corresponding to the filter screen 7 is arranged at the bottom of the pulverizing cylinder 2.

[0028] like Figure 4 and Figure 6 As shown, the driving structure 4 includes a transmission shaft 9, a motor 10 and a gear box 11. The transmission shaft 9 passes through the rear center of the crushing cylinder 2. One end of the transmission shaft 9 is located in the crushing cylinder 2 and is fixedly connected to the center of the cutter disc 5. A connecting pipe 12 is provided on the side wall of the cutter disc 6. The connecting pipe 12 is rotatably connected to the crushing cylinder 2. One end of the connecting pipe 12 is located in the crushing cylinder 2 and is detachably connected to the center of the cutter disc 6. The other end of the connecting pipe 12 passes through the rear side of the crushing cylinder 2 and is located in the gear box 11. A plurality of inclined convex teeth are provided on the outer side of the connecting pipe 11. The plurality of convex teeth are evenly distributed along the circumference of the connecting pipe 12 to form a bevel gear 13. The gear box 11 is detachably connected to the outer side of the crushing cylinder 2. The other end of the transmission shaft 9 is detachably connected to the outer side of the crushing cylinder 2. After passing through the cutter disc 2 6 and the connecting pipe 12 for the first time, it is located in the gear box 11 and fixed with a bevel gear 2 14. The other end of the transmission shaft 9 is rotatably connected to one side of the gear box 11, and the transmission shaft 9 is rotatably connected to the cutter disc 2 6 and the connecting pipe 12 respectively. A bevel gear 3 15 is provided on the other side of the gear box 11, which is meshed with the bevel gear 1 13 and the bevel gear 2 14 respectively. The motor 10 is detachably connected to the frame 1, and the output end of the motor 10 is connected to the bevel gear 3 15. The transmission shaft 9 drives the cutter disc 1 5 to rotate forwardly through the meshing of the bevel gear 3 15 and the bevel gear 2 14 under the drive of the motor 10. The connecting pipe 12 drives the cutter disc 2 6 to rotate reversely through the meshing of the bevel gear 3 15 and the bevel gear 1 13 under the drive of the motor 10. A gear shaft 16 is provided on the bevel gear three 15, and the gear shaft 16 is rotatably connected to the side wall of the gear box 11. One end of the gear shaft 16 is fixedly connected to the bevel gear three 15 and is located in the crushing cylinder 2, and the other end of the gear shaft 16 is located outside the crushing cylinder 2 and is connected to the output end belt drive of the motor 10.

[0029] like Figure 2 and Figure 4As shown, the shapes of the blade disc 1 5 and the blade disc 2 6 are both circular, and the front and rear sides of the blade disc 1 5 are provided with a plurality of groups of crushing components 17, and the plurality of groups of crushing components 17 are evenly distributed along the radial direction of the blade disc 1 5, and the crushing components 1 17 include a plurality of crushing shafts 18, and the plurality of crushing shafts 18 are evenly distributed in a circular ring shape with the center of the blade disc 1 5 as the center, and the crushing shafts 18 are fixedly connected to the blade disc 1 5, and the front and rear sides of the blade disc 2 6 are provided with a plurality of groups of crushing components 2 19, and the plurality of groups of crushing components 2 19 are evenly distributed along the radial direction of the blade disc 2 6 and are interlaced with the plurality of groups of crushing components 1 17, and the crushing components 2 19 include a plurality of crushing shafts 2 20, and the plurality of crushing shafts 20 are evenly distributed in a circular ring shape with the center of the blade disc 2 6 as the center, and the crushing shafts 2 20 are fixedly connected to the blade disc 2 6. The shortest straight-line distance between the blade disc 1 5 and the blade disc 2 6 is less than the sum of the lengths of the crushing shafts 1 18 and 20. The cutter disc 1 5 and the cutter disc 2 6 are both provided with a plurality of feeding holes 21 evenly distributed along the circumference thereof, and the crushing shaft 1 18 and the crushing shaft 2 20 are respectively located on the sides of the corresponding feeding holes 21 .

[0030] like Figure 1 and Figure 2 As shown, the front side of the pulverizing cylinder 2 is provided with an inspection port 22 connected with the interior thereof, and an inspection door 23 is provided at the inspection port 22. The feed port 3 is located on the inspection door 23, and the inspection door 23 completely covers the inspection port 22. One side of the inspection door 23 is rotatably connected to one side of the inspection port 22, and a hand wheel 24 is rotatably connected to the outer side wall of the pulverizing cylinder 2, and a locking port 25 matching the hand wheel 24 is provided on the other side of the inspection door 23.

[0031] like Figure 2 and Figure 4 As shown, the filter screen 7 is in the shape of a circular ring, and the central axis of the filter screen 7 is respectively in the same straight line with the central axis of the blade disc 1 5 and the central axis of the blade disc 2 6, one end of the filter screen 7 is connected to the inspection port 22 and is detachably connected to the side wall of the inspection port 22, and the other end of the filter screen 7 is detachably connected to the rear side of the crushing cylinder 2.

[0032] like Figure 1 , Figure 2 and Figure 4 As shown, a feed hopper 26 with a top opening is provided at the feed port 3, one side of the feed hopper 26 is detachably connected to the inspection door 23, the feed port 3 is located at the bottom of one side of the feed hopper 26, and the other side of the feed hopper 26 is provided with a guide inclined surface 27 that gradually approaches the feed port 3 from the top of the feed hopper 26 to its bottom. A guide hopper 28 is provided at the discharge port 8, the guide hopper 28 is arranged in an inclined manner, one end of the guide hopper 28 is detachably connected to the discharge port 8, and the other end of the guide hopper 28 passes through the frame 1 and is located at the front side of the frame 1, and the motor 10 is detachably connected to the rear side of the frame 1.

[0033] The material to be crushed enters the crushing cylinder 2 from the feed port 3, and the driving structure 4 drives the cutter disc 1 5 to rotate forward and the cutter disc 2 6 to rotate reversely. During the rotation of the cutter disc 1 5 and the cutter disc 2 6, the crushing shaft 1 18 and the crushing shaft 2 20 are used to strike the material in the forward and reverse directions respectively, thereby achieving the purpose of improving the crushing effect and improving the crushing efficiency; the crushed material is discharged from the discharge port 8 through the filter screen 7 for collection, so that the coarseness of the material meets the requirements.

[0034] When the driving structure 4 is working, the motor 10 drives the bevel gear three 15 to rotate, and the bevel gear three 15 is respectively meshed with the bevel gear one 13 and the bevel gear two 14, so that the bevel gear one 13 and the bevel gear two 14 rotate in opposite directions. Since the bevel gear one 13 is connected to the cutter disc two 6 through the connecting tube 12, and the bevel gear two 14 is connected to the cutter disc one 5 through the transmission shaft 9, the cutter disc one 5 and the cutter disc two 6 can be rotated in the positive and negative directions respectively only through the control of the motor 10, which is convenient to control and has a simple structure.

Claims

1. A reversing speed pulverizing device, characterized in that: The machine comprises a frame (1), a grinding cylinder (2) is connected to the frame (1), a feed port (3) is provided on the front side of the grinding cylinder (2), a drive structure (4) is provided on the rear side of the grinding cylinder (2), the drive structure (4) is detachably connected to the grinding cylinder (2), a knife disc 1 (5), a knife disc 2 (6) and an annular filter screen (7) are provided in the grinding cylinder (2), the knife disc 1 (5) is located on the side of the knife disc 2 (6), and the knife disc 1 (5) is provided on the rear side of the grinding cylinder (2). ) is connected to the pulverizing cylinder (2) in a forward rotational direction under the drive of the driving structure (4); the blade disc 2 (6) is connected to the pulverizing cylinder (2) in a reverse rotational direction under the drive of the driving structure (4); the two ends of the filter screen (7) are detachably connected to the front and rear sides of the pulverizing cylinder (2); the blade disc 1 (5), the blade disc 2 (6) and the feed port (3) are all located in the filter screen (7); and the bottom of the pulverizing cylinder (2) is provided with a discharge port (8) corresponding to the filter screen (7).

2. A reverse speed pulverizing device according to claim 1, characterized in that: The driving structure (4) comprises a transmission shaft (9), a motor (10) and a gear box (11); the transmission shaft (9) passes through the rear center of the crushing cylinder (2); one end of the transmission shaft (9) is located in the crushing cylinder (2) and is fixedly connected to the center of the first cutter disc (5); a connecting pipe (12) is provided on the side wall of the second cutter disc (6); the connecting pipe (12) is rotatably connected to the crushing cylinder (2); one end of the connecting pipe (12) is located in the crushing cylinder (2) and is detachably connected to the center of the second cutter disc (6); the other end of the connecting pipe (12) passes through the rear side of the crushing cylinder (2) and is located in the gear box (11); a plurality of inclined convex teeth are provided on the outer side of the connecting pipe (12); the plurality of convex teeth are evenly distributed along the circumference of the connecting pipe (12) and together form a bevel gear (13); the gear box (11) is detachably connected to the outer side of the crushing cylinder (2); the other end of the transmission shaft (9) passes through the connecting pipe (12) in sequence; The cutter disc 2 (6) and the connecting pipe (12) are located in the gear box (11) and fixed with a bevel gear 2 (14). The other end of the transmission shaft (9) is rotatably connected to one side of the gear box (11). The transmission shaft (9) is rotatably connected to the cutter disc 2 (6) and the connecting pipe (12). The other side of the gear box (11) is provided with a bevel gear 3 (15) which is meshed with the bevel gear 1 (13) and the bevel gear 2 (14). The motor (10) is detachably connected to the frame (1), the output end of the motor (10) is connected to the bevel gear three (15), the transmission shaft (9) is driven by the motor (10) to drive the cutter disc one (5) to rotate in the forward direction through the meshing of the bevel gear three (15) and the bevel gear two (14), and the connecting pipe (12) is driven by the motor (10) to drive the cutter disc two (6) to rotate in the reverse direction through the meshing of the bevel gear three (15) and the bevel gear one (13).

3. A reverse speed pulverizing device according to claim 2, characterized in that: The bevel gear three (15) is provided with a gear shaft (16), the gear shaft (16) being rotatably connected to the side wall of the gear box (11), one end of the gear shaft (16) being fixedly connected to the bevel gear three (15) and being located inside the grinding cylinder (2), and the other end of the gear shaft (16) being located outside the grinding cylinder (2) and being belt-drivenly connected to the output end of the motor (10).

4. A reverse speed pulverizing device according to claim 1, characterized in that: The shapes of the blade disc 1 (5) and the blade disc 2 (6) are both circular. A plurality of groups of crushing assemblies 1 (17) are provided on both the front and rear sides of the blade disc 1 (5). The plurality of groups of crushing assemblies 1 (17) are evenly distributed along the radial direction of the blade disc 1 (5). The crushing assemblies 1 (17) include a plurality of crushing shafts 1 (18). The plurality of crushing shafts 1 (18) are evenly distributed in a circular ring shape with the center of the blade disc 1 (5) as the center. The crushing shafts 1 (18) are fixedly connected to the blade disc 1 (5). A plurality of groups of crushing assemblies 2 (19) are provided on both the front and rear sides of the blade disc 2 (6). The plurality of groups of crushing assemblies 2 (19) are evenly distributed along the radial direction of the blade disc 2 (6) and are interlaced with the plurality of groups of crushing assemblies 1 (17). The crushing assemblies 2 (19) include a plurality of crushing shafts 2 (20). The plurality of crushing shafts 2 (20) are evenly distributed in a circular ring shape with the center of the blade disc 2 (6) as the center. The crushing shafts 2 (20) are fixedly connected to the blade disc 2 (6).

5. A reverse speed pulverizing device according to claim 4, characterized in that: The shortest straight-line distance between the blade disc 1 (5) and the blade disc 2 (6) is less than the sum of the lengths of the crushing shaft 1 (18) and the crushing shaft 2 (20).

6. A reverse speed pulverizing device according to claim 4, characterized in that: The blade disc 1 (5) and the blade disc 2 (6) are both provided with a plurality of material passing holes (21) evenly distributed along their circumferences, and the crushing shaft 1 (18) and the crushing shaft 2 (20) are respectively located on the sides of the corresponding material passing holes (21).

7. A reverse speed pulverizing device according to claim 1 or 2 or 3 or 4 or 5 or 6, characterized in that: The front side of the pulverizing cylinder (2) is provided with an inspection opening (22) which is connected to the interior thereof, and the inspection opening (22) is provided with an inspection door (23). The feed port (3) is located on the inspection door (23), and the inspection door (23) completely covers the inspection opening (22). One side of the inspection door (23) is rotatably connected to one side of the inspection opening (22), and the other side corresponding to the inspection opening (22) is provided with a hand wheel (24), and the hand wheel (24) is rotatably connected to the outer side wall of the pulverizing cylinder (2), and the other side corresponding to the inspection door (23) is provided with a locking opening (25) which matches the hand wheel (24).

8. A reverse speed pulverizing device according to claim 7, characterized in that: The filter screen (7) is in the shape of a ring, the central axis of the filter screen (7) is respectively in the same straight line with the central axis of the first blade disc (5) and the central axis of the second blade disc (6), one end of the filter screen (7) is connected to the inspection opening (22) and is detachably connected to the side wall of the inspection opening (22), and the other end of the filter screen (7) is detachably connected to the rear side of the crushing cylinder (2).

9. A reverse speed pulverizing device according to claim 7, characterized in that: A feed hopper (26) with a top opening is provided at the feed port (3), one side of the feed hopper (26) is detachably connected to the inspection door (23), the feed port (3) is located at the bottom of one side of the feed hopper (26), and the other side of the feed hopper (26) corresponding to the feed hopper (26) is provided with a guiding inclined surface (27) that gradually approaches the feed port (3) from the top of the feed hopper (26) to its bottom.

10. The reverse speed pulverizing device according to claim 2, characterized in that: A guide hopper (28) is provided at the discharge port (8), the guide hopper (28) being arranged in an inclined manner, one end of the guide hopper (28) being detachably connected to the discharge port (8), the other end of the guide hopper (28) passing through the frame (1) and being located at the front side of the frame (1), and the motor (10) being detachably connected to the rear side of the frame (1).

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