A plastic waste recycling device

Abstract

The application relates to the technical field of plastic recycling, and particularly relates to a plastic waste recycling device, which comprises a feeding bin, a crushing chamber is installed at the bottom of the feeding bin, a support is installed on the outer surface of the crushing chamber, the side, away from the crushing chamber, of the support is downwardly inclined to form an inclined surface, a cutter shaft is rotatably installed in the crushing chamber, one end of the cutter shaft extends to the outside of the crushing chamber and is provided with a large belt pulley, a motor is installed on the inclined surface of the support through an adjusting piece, a small belt pulley is installed on the output shaft of the motor, the large belt pulley is connected with the small belt pulley through a plurality of transmission belts, a belt cover is connected with the support through bolts, the side, facing the crushing chamber, of the belt cover is open, and the transmission belts, the large belt pulley and the small belt pulley are arranged in the belt cover. The risk that a worker is injured by mistake in a cleaning process is fundamentally avoided, and the safety hidden danger that a transmission belt is always connected in a traditional device is solved.

Description

Technical Field

[0001] This invention relates to the field of plastic recycling technology, specifically to a plastic waste recycling device. Background Technology

[0002] The crushing and recycling of plastic waste, as a crucial link in the resource recycling system, can transform various types of waste plastics into raw materials that can be reused in production through a complete and systematic processing flow. This process not only effectively reduces the environmental pollution pressure of plastic waste but also significantly reduces the demand for virgin plastics, which is of great significance in terms of environmental protection and resource conservation. Specifically, in the crushing stage, the operation process typically involves feeding collected waste plastics into the crushing chamber through a feeding hopper. The crushing chamber is powered by a motor, which, through the coordinated action of a transmission belt and pulley, drives a cutter shaft equipped with movable blades within the crushing chamber to rotate at high speed. During rotation, the movable blades cooperate with the fixed blades installed inside the crushing chamber, crushing the input waste plastic into fine fragments through shearing and impact actions. These crushed plastic fragments are then screened by a mesh plate at the bottom and fall into a temporary storage bin below for further processing.

[0003] In practice, there are certain safety hazards: when the motor unexpectedly stops due to a sudden malfunction, a significant amount of incompletely crushed plastic often remains inside the crushing chamber. To prevent damage caused by the motor restarting under load, workers need to open the crushing chamber and manually clean out the remaining plastic. However, the problem is that the motor and the crushing chamber's cutter shaft remain connected via a drive belt. If the motor starts unexpectedly due to misoperation or malfunction during this process, the cutter shaft will suddenly rotate, which could easily cause serious injury to workers performing the cleaning operation, resulting in poor overall safety. Summary of the Invention

[0004] To address the aforementioned issues, a plastic waste recycling device is provided. This device solves the problem that the motor and the cutter shaft of the crushing chamber are still connected via a transmission belt. If the motor is accidentally started due to misoperation or malfunction during this process, the cutter shaft will suddenly rotate, which could easily cause serious injury to workers who are cleaning up the waste, resulting in poor overall safety.

[0005] To address the problems of existing technologies, this invention provides a plastic waste recycling device.

[0006] As one technical solution of the present invention, a plastic waste recycling device includes:

[0007] Feeding bin;

[0008] The crushing chamber is installed at the bottom of the feeding hopper. A support is installed on the outer surface of the crushing chamber. The side of the support away from the crushing chamber is inclined downward to form an inclined surface. A storage hopper for temporarily storing plastic fragments is provided directly below the crushing chamber. The storage hopper is connected and fixed to the support. The upper end and one side of the storage hopper are open.

[0009] A cutter shaft is rotatably mounted inside the crushing chamber, with one end of the cutter shaft extending to the outside of the crushing chamber and fitted with a large pulley;

[0010] The motor is mounted on the inclined surface of the bracket via an adjusting component. A small pulley is mounted on the output shaft of the motor, and a large pulley is connected to the small pulley via multiple transmission belts.

[0011] The belt cover is connected to the bracket by bolts. The side of the belt cover facing the crushing chamber is open. The drive belt, large pulley and small pulley are all set inside the belt cover.

[0012] Furthermore, the adjusting member includes:

[0013] A movable base is slidably mounted on the inclined surface of the bracket. The motor is mounted on the movable base by bolts. A guide groove is provided at the middle of the upper surface of the movable base. A guide block is inserted in the guide groove. The guide block is mounted on the inclined surface of the bracket.

[0014] A support lug is installed at the end of the movable seat away from the crushing chamber, and a through hole is provided on one side of the support lug;

[0015] An adjusting stud is inserted into a through hole at one end. Both sides of the through hole are provided with retaining rings. The retaining rings are sleeved on the adjusting stud and connected and fixed to it. A positioning seat, threadedly connected to the adjusting stud, is sleeved on the adjusting stud and connected and fixed to a bracket. A through hole is opened at the end of the adjusting stud away from the support lug, and a handle is inserted into the through hole. Both ends of the handle are fitted with round heads. A lock-loosening nut is threaded onto the adjusting stud and is located on the side of the positioning seat away from the support lug.

[0016] Furthermore, the positioning seat includes an L-shaped plate, the lower end of which is connected and fixed to the bracket. Two detachable clamping blocks are installed on the upper end of the L-shaped plate. Semicircular grooves are opened on the opposite surfaces of the two clamping blocks, and the two semicircular grooves form a circular space. An internal thread that mates with an adjusting stud is machined on the inner wall of the semicircular groove. The adjusting stud is threadedly connected in the circular space formed by the two semicircular grooves.

[0017] Furthermore, the upper end of the L-shaped plate is fixed with two lower connecting ears, and the back sides of the two clamping blocks are each equipped with an upper connecting ear that mates with the lower connecting ears. The upper surface of the lower connecting ear is provided with a lower small hole, and the upper surface of the upper connecting ear is provided with an upper small hole that is aligned with the lower small hole. A connecting screw is inserted into the channel formed by the lower small hole and the upper small hole, and a nut is threaded to the lower end of the connecting screw.

[0018] Furthermore, the upper surfaces of the two clamping blocks are recessed downward to form slots, and a U-shaped rod is inserted into the space formed by the two slots. A U-shaped handle is installed on the upper surface of the horizontal part of the U-shaped rod.

[0019] Furthermore, the slot has a rectangular cross-section, the U-shaped plug has a rectangular cross-section, and both ends of the U-shaped plug are glued with rubber heads, which are interference-fitted with the inner wall of the slot.

[0020] Furthermore, a support arm plate is bolted to the end of the movable seat away from the support lug. A slat is installed at the end of the support arm plate away from the movable seat. A large frame box and a small frame box are respectively installed at both ends of the slat. The small frame box is located inside the belt cover near the small pulley, and the large frame box is located inside the belt cover near the large pulley. Multiple evenly arranged round rods are installed at both ends of the large frame box and both ends of the small frame box. The multiple round rods are alternately arranged with multiple transmission belts.

[0021] Furthermore, a limiting ring is fitted onto the round rod and fixedly connected to the round rod. A sleeve is provided on the side of the limiting ring near the transmission belt. The sleeve is fitted onto the round rod and rotatably connected to the round rod. The sleeve is in rolling contact with the transmission belt.

[0022] Furthermore, the crushing chamber includes an upper chamber body, which is installed at the bottom of the feeding hopper. The bottom of the upper chamber body is bolted to the upper chamber body. The lower chamber body is connected and fixed to a support. The side of the lower chamber body facing the upper chamber body and the side of the upper chamber body facing the lower chamber body are both inclined. Two fixed blades are installed between the upper and lower chamber bodies. Multiple blade holders connected and fixed to the blade shaft are sleeved on the blade shaft. Multiple movable blades that cooperate with the fixed blades are installed on the blade holders. A semi-circular mesh plate is installed in the lower part of the lower chamber body.

[0023] Furthermore, a flywheel is installed at the end of the cutter shaft away from the large pulley, and a protective cover is provided on the outside of the flywheel. The side of the protective cover facing the lower chamber is open, and the protective cover is connected to the bracket by bolts.

[0024] The advantages of this invention compared to the prior art are:

[0025] 1. The motor is slidably mounted on the inclined surface of the bracket. When it is necessary to clean residual plastic in the crushing chamber, the adjusting stud can be rotated to drive the moving seat to slide along the inclined surface, allowing the motor to move closer to the crushing chamber with the moving seat. This loosens the transmission belt and separates it from the large and small pulleys. At this time, the power connection between the motor and the cutter shaft is cut off. Even if the motor starts accidentally, the cutter shaft will not rotate, fundamentally avoiding the risk of accidental injury to workers during the cleaning process and solving the safety hazard of the always-connected transmission belt in traditional devices.

[0026] 2. By rotating the adjusting stud with the handle, the position of the moving seat can be finely adjusted through the threaded engagement between the positioning seat and the adjusting stud, thereby precisely controlling the tension of the transmission belt. If the transmission belt is too loose, it can be tightened promptly to prevent slippage and ensure proper power transmission during crushing; if the transmission belt is too tight, it can be loosened appropriately to reduce motor load and belt wear, extending the service life of the transmission components.

[0027] 3. The drive belt and pulleys are enclosed within a belt cover, preventing the belt from slipping off or getting caught in debris during operation. This further isolates the transmission components, reducing the risk of accidental contact. When the drive belt is slack, the alternating arrangement of multiple cylinders and multiple drive belts, along with the structure formed by the large frame box, lower frame box, and round rods, effectively supports and limits the drive belt. This prevents the need to remove the belt cover to connect the drive belt to the large or small pulley due to excessive belt displacement. Simply adjusting the studs is sufficient, eliminating the need for excessive effort to prevent excessive belt displacement. By fitting a sleeve on the round rod, the sliding contact between the round rod and the drive belt is converted into rolling contact between the sleeve and the drive belt, reducing wear on the drive belt.

[0028] 4. The two clamping blocks are mounted on the L-shaped plate using the structure formed by the connecting screws and nuts. The adjusting stud is then threaded into the space formed by the two semi-circular grooves. When the adjusting stud is affected by debris, the clamping blocks can be separated from the adjusting stud by disassembling the connecting screws and nuts, making it easy to clean the debris in the threaded connection.

[0029] 5. After the two clamping blocks are assembled, insert the two ends of the U-shaped rod into the two slots respectively. At this time, the rubber head is in an interference fit with the inner wall of the slot to prevent the U-shaped rod from coming out of the slot at will. The fasteners formed by the connecting screws and nuts cooperate with the U-shaped rod to improve the stability of the assembly of the two clamping blocks. Attached Figure Description

[0030] Figure 1 This is a three-dimensional diagram of a plastic waste recycling device.

[0031] Figure 2 This is a perspective view of a plastic waste recycling device.

[0032] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0033] Figure 4 This is an assembly diagram of a motor, transmission belt, cutter shaft, and support frame in a plastic waste recycling device.

[0034] Figure 5 This is an exploded structural diagram of the clamping block, U-shaped insert rod, adjusting stud, and L-shaped plate in a plastic waste recycling device.

[0035] Figure 6 This is an assembly diagram of a large frame box, a small frame box, and a transmission belt in a plastic waste recycling device.

[0036] Figure 7 This is an assembly diagram of a large frame box, a lower frame box, and a movable base in a plastic waste recycling device.

[0037] Figure 8 yes Figure 7 Enlarged view of section B in the middle.

[0038] The numbers on the map are:

[0039] 1. Feeding bin; 11. Upper chamber; 12. Lower chamber; 13. Support; 14. Storage bin; 2. Motor; 21. Drive belt; 22. Small pulley; 23. Large pulley; 24. Fixed blade; 25. Movable blade; 26. Cutter shaft; 27. Flywheel; 28. Cutter holder; 29. ​​Protective cover; 3. Moving seat; 31. Support lug; 32. Guide groove; 33. Through hole; 4. Belt cover; 5. Slat; 51. Support arm plate; 52. Small frame box; 53. Large frame box; 54. Sleeve; 55. Limiting ring; 56. Round rod; 6. Adjusting stud; 61. Handle; 62. Anti-loosening nut; 63. U-shaped insert rod; 64. Blocking ring; 65. Clamping block; 66. Upper connecting lug; 67. Lower connecting lug; 68. L-shaped plate; 69. Slot; 7. Mesh plate. Detailed Implementation

[0040] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0041] See Figures 1-8As shown, a plastic waste recycling device includes a feeding hopper 1, a crushing chamber installed at the bottom of the feeding hopper 1, and an upper chamber 11 installed at the bottom of the feeding hopper 1. The bottom of the upper chamber 11 is bolted to a lower chamber 12. The lower chamber 12 is connected and fixed to a support 13. The side of the lower chamber 12 facing the upper chamber 11 and the side of the upper chamber 11 facing the lower chamber 12 are both inclined. Two fixed blades 24 are installed between the upper chamber 11 and the lower chamber 12. A plurality of blade holders 28 connected and fixed to the blade shaft 26 are sleeved on the blade shaft 26. A plurality of movable blades 25 that cooperate with the fixed blades 24 are installed on the blade holders 28. A semi-circular mesh plate is installed in the lower part of the lower chamber 12. 7. A flywheel 27 is installed at the end of the cutter shaft 26 away from the large pulley 23. A protective cover 29 is provided on the outside of the flywheel 27. The side of the protective cover 29 facing the lower chamber 12 is open. The protective cover 29 is connected to the bracket 13 by bolts. A storage bin 14 for temporarily storing plastic fragments is provided directly below the crushing chamber. The storage bin 14 is connected and fixed to the bracket 13. The upper end and one side of the storage bin 14 are open, which facilitates the collection of crushed plastic fragments and allows for quick manual or mechanical material removal. The moving blades 25 and fixed blades 24 in the crushing chamber cut each other in an alternating manner, which can efficiently crush various types of plastic waste. The semi-circular mesh plate 7 can screen out fragments with uniform particle size to ensure the consistency of raw materials for subsequent recycling processing. The flywheel 27 at the end of the cutter shaft 26 can use inertia to maintain the smooth rotation of the cutter shaft 26, reduce the impact load when the motor 2 starts, and especially when crushing harder plastics, it can prevent the cutter shaft 26 from jamming, ensuring the continuity and stability of the crushing process.

[0042] The side of the bracket 13 away from the crushing chamber slopes downwards to form an inclined surface. The cutter shaft 26 is rotatably mounted inside the crushing chamber. One end of the cutter shaft 26 extends to the outside of the crushing chamber and is fitted with a large pulley 23. A small pulley 22 is mounted on the output shaft of the motor 2. The large pulley 23 is connected to the small pulley 22 via multiple drive belts 21. The belt cover 4 is bolted to the bracket 13. The side of the belt cover 4 facing the crushing chamber is open. The drive belts 21, the large pulley 23, and the small pulleys 22 are all housed inside the belt cover 4. This design prevents the belts from slipping off or getting caught in debris during operation and further isolates the transmission components, reducing the risk of accidental contact.

[0043] The movable seat 3 is slidably mounted on the inclined surface of the bracket 13. The motor 2 is mounted on the movable seat 3 by bolts. A guide groove 32 is provided in the middle of the upper surface of the movable seat 3. A guide block is inserted in the guide groove 32. The guide block is mounted on the inclined surface of the bracket 13. The movable seat 3 slides through the guide groove 32 and the guide block on the bracket 13 to ensure that the motor 2 always moves smoothly along the inclined surface during the adjustment process, avoids uneven force on the transmission belt 21 due to deviation, and ensures transmission stability.

[0044] The lug 31 is installed at the end of the movable seat 3 away from the crushing chamber. One side of the lug 31 has a through hole 33. One end of the adjusting stud 6 is inserted into the through hole 33. Both sides of the through hole 33 have retaining rings 64, which are fitted onto and fixed to the adjusting stud 6. A positioning seat, threadedly connected to the adjusting stud 6, is fitted onto the adjusting stud 6 and fixed to the bracket 13. The end of the adjusting stud 6 away from the lug 31 has a through hole, into which a handle 61 is inserted. Both ends of the handle 61 have round heads. An anti-loosening nut 62 is threaded onto the adjusting stud 6 and is located on the side of the positioning seat away from the lug 31. The motor 2 is slidably mounted on the inclined surface of the bracket 13. This design provides a basis for flexible control of the transmission system. When the crushing chamber has a large amount of residual plastic due to an unexpected shutdown of the motor 2, requiring manual cleaning, the operator can rotate the adjusting stud 6 to slide the connected movable seat 3 along the inclined surface of the bracket 13. At this time, motor 2 moves synchronously with the moving base 3, gradually approaching the crushing chamber. The originally taut transmission belt 21 then loosens and eventually completely separates from the large pulley 23 and the small pulley 22. This process directly cuts off the power transmission path between motor 2 and cutter shaft 26. Even if motor 2 starts unexpectedly due to misoperation or malfunction during this period, cutter shaft 26 will not rotate, eliminating the risk of workers being accidentally injured by rotating parts during cleaning operations and completely solving the safety hazards caused by the transmission belt 21 always being connected in traditional devices.

[0045] The tension of the transmission belt 21 significantly affects the equipment's operating efficiency and component lifespan. This device allows for precise control by rotating the adjusting stud 6 via the handle 61. The adjusting stud 6 is tightly threaded onto the positioning seat. When the handle 61 is rotated, the adjusting stud 6 pushes or pulls the moving seat 3 axially, thereby fine-tuning the distance between the motor 2 and the crushing chamber. When the transmission belt 21 becomes loose, causing slippage and affecting power transmission efficiency, the moving seat 3 can be adjusted away from the crushing chamber to re-tension the transmission belt 21, ensuring that the power of the motor 2 is efficiently transmitted to the cutter shaft 26 and guaranteeing stable crushing operations. If the transmission belt 21 is overly tight due to long-term use or improper installation, it will exacerbate the load on the motor 2 and the wear of the transmission belt 21 itself. In this case, the adjusting stud 6 can be reversed to bring the moving seat 3 closer to the crushing chamber, relieving the tension of the transmission belt 21, reducing unnecessary energy loss, extending the service life of components such as the transmission belt 21 and the motor 2, and reducing equipment maintenance costs.

[0046] The positioning seat includes an L-shaped plate 68, the lower end of which is fixedly connected to the bracket 13. Two detachable clamping blocks 65 are mounted on the upper end of the L-shaped plate 68. Each clamping block 65 has a semi-circular groove on its opposite surface, forming a circular space. Internal threads that mate with adjusting studs 6 are machined on the inner walls of the semi-circular grooves. The adjusting studs 6 are threaded into the circular space formed by the two semi-circular grooves. Two lower connecting ears 67 are fixedly connected to the upper end of the L-shaped plate 68. Upper connecting ears 66 that mate with the lower connecting ears 67 are mounted on the opposite sides of each clamping block 65. The upper surface of the lower connecting ears 67 has... The upper connecting lug 66 has a small lower hole, and an upper connecting lug 67 has a small upper hole aligned with the lower hole. A connecting screw is inserted into the channel formed by the lower and upper holes, and a nut is threaded onto the lower end of the connecting screw. The upper surfaces of the two clamping blocks 65 are recessed downwards to form slots 69. A U-shaped rod 63 is inserted into the space formed by the two slots 69. A U-shaped handle is installed on the upper surface of the horizontal part of the U-shaped rod 63. The slots 69 and U-shaped rod 63 have rectangular cross-sections. Rubber heads are glued to both ends of the U-shaped rod 63, and the rubber heads are interference-fitted with the inner wall of the slots 69. The two clamping blocks 65 are fixed to the L-shaped plate 68 by the cooperation of the connecting screw and nut: the connecting screw passes through the upper connecting lug 66 and the lower connecting lug 67, and after tightening the nut at the lower end, the clamping block 65 is firmly connected to the L-shaped plate 68. At this time, the semi-circular grooves on the opposite sides of the two clamping blocks 65 are combined to form a complete circular space, and the adjusting stud 6 is precisely threaded into this circular space, forming a stable transmission and adjustment structure. When the threaded surface of the adjusting stud 6 becomes stuck or obstructed due to dust, debris, or other contaminants accumulated over time, simply unscrew the nut and remove the connecting screw to detach the clamp 65 from the L-shaped plate 68, thus separating the clamp 65 from the adjusting stud 6. This disassembly process is simple and convenient, directly exposing the threaded contact area between the adjusting stud 6 and the clamp 65, facilitating thorough cleaning of debris and ensuring smooth subsequent adjustments.

[0047] After the two clamping blocks 65 are assembled and fixed, the two ends of the U-shaped plug 63 are inserted into the slots 69 of the two clamping blocks 65 respectively. The rubber heads at both ends of the U-shaped plug 63 form an interference fit with the inner wall of the slot 69. With the elastic deformation of the rubber, it fits tightly against the inner wall of the slot 69, effectively preventing the U-shaped plug 63 from accidentally falling out of the slot 69 during equipment vibration or adjustment. At the same time, the fasteners consisting of connecting screws and nuts provide longitudinal fixation, while the U-shaped plug 63 further reinforces the splicing of the two clamping blocks 65 from the lateral side. The two work together to form a double fixation, which significantly improves the overall stability of the clamping blocks 65 after assembly, avoids the clamping blocks 65 from loosening or shifting when the adjusting stud 6 rotates, and ensures the precise transmission of the adjustment structure.

[0048] A support arm plate 51 is bolted to the end of the movable seat 3 away from the support lug 31. A slat 5 is installed at the end of the support arm plate 51 away from the movable seat 3. A large frame box 53 and a small frame box 52 are installed at both ends of the slat 5, respectively. The small frame box 52 is located inside the belt cover 4 near the small pulley 22, and the large frame box 53 is located inside the belt cover 4 near the large pulley 23. Multiple evenly arranged round rods 56 are installed at both ends of the large frame box 53 and both ends of the small frame box 52. The multiple round rods 56 are alternately arranged with multiple transmission belts 21. A limiting ring 55 is fitted on the round rod 56 and fixed to the round rod 56. A sleeve 54 is provided on the side of the limiting ring 55 near the transmission belt 21. The sleeve 54 is fitted on the round rod 56 and rotatably connected to the round rod 56. The sleeve 54 is in rolling contact with the transmission belt 21. When the drive belt 21 is in a slack state, the support structure formed by the alternating arrangement of multiple round rods 56 and multiple drive belts 21, along with the large frame box 53, small frame box 52, and round rods 56, lifts and limits the drive belt 21. These round rods 56 support the drive belt 21 from the inside, effectively limiting excessive sag or lateral displacement of the drive belt 21 and preventing it from dislodging from the pulley groove due to excessive displacement. Therefore, when it is necessary to re-tension the drive belt 21, there is no need to disassemble the belt cover 4 and manually adjust the connection between the drive belt 21 and the large pulley 23 and small pulley 22. Tensioning the drive belt 21 can be completed simply by controlling the adjusting stud 6 to move the moving seat 3, eliminating tedious disassembly and assembly steps and avoiding the need to spend extra effort to correct large deviations in the drive belt 21, significantly improving operational convenience.

[0049] Meanwhile, the sleeve 54 fitted onto the round rod 56 is rotatably connected to the round rod 56. When the transmission belt 21 contacts the round rod 56 during tensioning or operation, the original sliding friction is transformed into rolling friction between the sleeve 54 and the transmission belt 21. This change in friction mode significantly reduces the wear on the surface of the transmission belt 21, reduces problems such as fraying and cracking caused by long-term friction, extends the service life of the transmission belt 21, and reduces the replacement frequency and maintenance costs.

[0050] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims

1. A plastic waste recycling device, characterized in that, include: Feeding bin (1); The crushing chamber is installed at the bottom of the feeding bin (1). A bracket (13) is installed on the outer surface of the crushing chamber. The side of the bracket (13) away from the crushing chamber is inclined downward to form an inclined surface. A storage bin (14) for temporarily storing plastic fragments is provided directly below the crushing chamber. The storage bin (14) is connected and fixed to the bracket (13). The upper end of the storage bin (14) and one side of the storage bin (14) are open. The cutter shaft (26) is rotatably mounted in the crushing chamber, with one end of the cutter shaft (26) extending to the outside of the crushing chamber and equipped with a large pulley (23). The motor (2) is mounted on the inclined surface of the bracket (13) by means of an adjusting component. A small pulley (22) is mounted on the output shaft of the motor (2). The large pulley (23) is connected to the small pulley (22) by multiple transmission belts (21). The belt cover (4) is connected to the bracket (13) by bolts. The side of the belt cover (4) facing the crushing chamber is open. The transmission belt (21), the large pulley (23) and the small pulley (22) are all installed inside the belt cover (4). The adjusting element includes: The movable seat (3) is slidably mounted on the inclined surface of the bracket (13). The motor (2) is mounted on the movable seat (3) by bolts. A guide groove (32) is provided in the middle of the upper surface of the movable seat (3). A guide block is inserted in the guide groove (32). The guide block is mounted on the inclined surface of the bracket (13). A support ear (31) is installed at the end of the movable seat (3) away from the crushing chamber, and a through hole (33) is provided on one side of the support ear (31). An adjusting stud (6) is inserted into a through hole (33) at one end. Both sides of the through hole (33) are provided with a blocking ring (64). The blocking ring (64) is sleeved on the adjusting stud (6) and connected and fixed to the adjusting stud (6). A positioning seat is sleeved on the adjusting stud (6) and threadedly connected to the adjusting stud (6). The positioning seat is connected and fixed to the bracket (13). A through hole is opened at the end of the adjusting stud (6) away from the support ear (31). A handle (61) is inserted in the through hole. Both ends of the handle (61) are equipped with round heads. A lock nut (62) is threadedly connected to the adjusting stud (6). The lock nut (62) is located on the side of the positioning seat away from the support ear (31). The movable seat (3) is bolted to a support plate (51) at one end away from the support lug (31). A slat (5) is installed at the other end of the support plate (51) away from the movable seat (3). A large frame box (53) and a small frame box (52) are installed at both ends of the slat (5). The small frame box (52) is located inside the belt cover (4) on the side near the small pulley (22). The large frame box (53) is located inside the belt cover (4) on the side near the large pulley (23). Multiple evenly arranged round rods (56) are installed at both ends of the large frame box (53) and the small frame box (52). The multiple round rods (56) are alternately arranged with multiple transmission belts (21). A limiting ring (55) is fitted on the round rod (56) and fixed to the round rod (56). A sleeve (54) is provided on the side of the limiting ring (55) near the transmission belt (21). The sleeve (54) is fitted on the round rod (56) and rotatably connected to the round rod (56). The sleeve (54) is in rolling contact with the transmission belt (21).

2. The plastic waste recycling device according to claim 1, characterized in that, The positioning seat includes an L-shaped plate (68), the lower end of which is connected and fixed to the bracket (13). Two detachable clamping blocks (65) are installed on the upper end of the L-shaped plate (68). The two clamping blocks (65) have semi-circular grooves on their opposite surfaces, forming a circular space. The inner wall of the semi-circular groove is machined with an internal thread that matches the adjusting stud (6). The adjusting stud (6) is threadedly connected in the circular space formed by the two semi-circular grooves.

3. The plastic waste recycling device according to claim 2, characterized in that, The upper end of the L-shaped plate (68) is connected and fixed with two lower connecting ears (67). The two clamping blocks (65) are each equipped with an upper connecting ear (66) that mates with the lower connecting ears (67) on their opposite sides. The upper surface of the lower connecting ear (67) is provided with a lower small hole, and the upper surface of the upper connecting ear (66) is provided with an upper small hole that is aligned with the lower small hole. A connecting screw is inserted into the channel formed by the lower small hole and the upper small hole, and a nut is threaded to the lower end of the connecting screw.

4. The plastic waste recycling device according to claim 3, characterized in that, The upper surfaces of the two clamps (65) are recessed downward to form slots (69), and a U-shaped rod (63) is inserted into the space formed by the two slots (69). A U-shaped handle is installed on the upper surface of the horizontal part of the U-shaped rod (63).

5. A plastic waste recycling device according to claim 4, characterized in that, The slot (69) has a rectangular cross-section, the U-shaped plug (63) has a rectangular cross-section, and both ends of the U-shaped plug (63) are glued with rubber heads, which are interference fit with the inner wall of the slot (69).

6. The plastic waste recycling device according to claim 1, characterized in that, The crushing chamber includes an upper chamber (11), which is installed at the bottom of the feeding bin (1). The bottom of the upper chamber (11) is bolted to the upper chamber (12). The lower chamber (12) is connected and fixed to the bracket (13). The side of the lower chamber (12) facing the upper chamber (11) and the side of the upper chamber (11) facing the lower chamber (12) are both inclined. Two fixed blades (24) are installed between the upper chamber (11) and the lower chamber (12). Multiple blade holders (28) connected and fixed to the blade shaft (26) are sleeved on the blade shaft (26). Multiple movable blades (25) that cooperate with the fixed blades (24) are installed on the blade holders (28). A semi-circular mesh plate (7) is installed in the lower part of the lower chamber (12).

7. A plastic waste recycling device according to claim 6, characterized in that, A flywheel (27) is installed at the end of the cutter shaft (26) away from the large pulley (23). A protective cover (29) is provided on the outside of the flywheel (27). The side of the protective cover (29) facing the lower chamber (12) is open. The protective cover (29) is connected to the bracket (13) by bolts.

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