A recycled plastic recycling device

Abstract

The application provides a regenerated plastic recycling device and relates to the technical field of plastic recycling equipment. The device comprises a crushing mechanism for crushing and recycling regenerated plastic. The crushing mechanism comprises a crushing box provided with a feeding bin at the top, an eccentric shaft arranged in the crushing box, a rotating sleeve arranged on the eccentric section, a plurality of crushing components mounted on the side surface of the rotating sleeve, and a self-rotation constraint component arranged on the crushing box and used for forcing the rotating sleeve to rotate around its own axis when the eccentric shaft drives the rotating sleeve to revolve. Each crushing component comprises a plurality of hinged seats mounted on the side surface of the rotating sleeve at equal intervals along the axial direction of the rotating sleeve, a crushing knife rotatably mounted on the hinged seat at one end, and a filter screen mounted below the crushing knife. The crushing knife makes a combined motion of revolution and rotation with the rotating sleeve under the condition of one-way driving. The motion track of the cutting edge of the crushing knife is a cycloid. Impact shearing is formed on the ductile plastic. Meanwhile, the stress direction of the moving knife root alternately changes, bidirectional shearing and automatic anti-winding are realized.

Description

Technical Field

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

[0002] Most existing plastic recycling devices employ a unidirectional rotating blade roller structure around a fixed axis, where the blades on the roller only shear against the fixed blade in one direction. When plastic film, woven bags, or filamentous materials are fed in, the material tends to accumulate between the roller and the inner wall of the housing, becoming entangled around the blade shaft, leading to decreased pulverization efficiency or even jamming. Unidirectional pulverization also results in a single tumbling path for the material within the pulverization chamber, with the shearing zone concentrated on one side of the roller, causing some material to be repeatedly squeezed without being cut.

[0003] To address the entanglement problem, existing technologies employ a motor that alternates between forward and reverse rotation to drive the cutter rollers. In this approach, the motor and reducer are frequently subjected to reverse impacts, resulting in complex electrical control and delayed switching response under heavy loads, potentially leading to insufficient reverse torque during jamming. Another approach involves a slinger blade on the cutter roller that interferes with a fixed block on the inner wall of the housing, utilizing the radial extension and retraction of the slinger blade to scrape away the entangled material. In this approach, the slinger blade always shears in the same rotational direction, and the cutting direction remains unchanged, allowing the entangled material to continue accumulating along the entanglement direction at the blade root. Yet another approach uses an eccentric shaft to drive a rotating sleeve in translational revolution. The rotating sleeve does not rotate on its own axis, and the crushing blade is hinged to the rotating sleeve, achieving bidirectional shearing through revolution. In this approach, the tangential velocity of the crushing blade relative to the fixed blade is constant. For high-toughness plastics (such as PP woven bags and PE agricultural films), this can easily cause compression deformation rather than cutting, causing the material to slip at the fixed blade edge. Simultaneously, the constant centrifugal force keeps the crushing blade in a maximum outward-spraying state, continuously compressing the entangled material at the blade root, making it difficult for it to detach on its own. Summary of the Invention

[0004] To address the above problems, the present invention provides a device for recycling recycled plastics.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a recycled plastic recycling device, comprising a crushing mechanism for crushing and recycling recycled plastic, the crushing mechanism comprising a crushing box with a feeding hopper at the top, an eccentric shaft passing through the crushing box, a rotating sleeve rotatably sleeved on the eccentric section, multiple crushing components installed on the side of the rotating sleeve, a rotation constraint component set on the crushing box and controlling the rotating sleeve to rotate around its own axis when the eccentric shaft drives the rotating sleeve to revolve, and a transmission component for driving the eccentric shaft to rotate unidirectionally, the eccentric shaft being composed of shafts at both ends and a shaft body located in the middle, the middle shaft body being the eccentric section, and the axis of the eccentric section being offset parallel to the axis of the shafts at both ends, the shafts at both ends being rotatably mounted on the crushing box; Multiple crushing components are arranged and installed at equal intervals along the axial direction of the rotating sleeve. Each crushing component includes multiple hinge seats that are installed at equal intervals around the axial direction of the rotating sleeve on the side of the rotating sleeve, a crushing blade that is rotatably installed on the hinge seat at one end, and a filter screen installed below the crushing blade.

[0006] Preferably, the rotation constraint assembly includes a fixed internal gear ring coaxially sleeved on the shaft and fixed to the inner wall of the crushing chamber, and a planetary gear fixedly installed on the end of the rotating sleeve. The planetary gear passes through the fixed internal gear ring and meshes with it. The number of teeth on the fixed internal gear ring is greater than the number of teeth on the planetary gear.

[0007] Preferably, the ratio of the number of teeth of the fixed internal gear ring to the number of teeth of the planetary gear is 2:1, and the rotating sleeve rotates twice when it revolves once around the planet.

[0008] Preferably, a needle roller bearing is installed between the rotating sleeve and the shaft of the eccentric section, and the inner diameter of the rotating sleeve is larger than the outer diameter of the eccentric section.

[0009] Preferably, each crushing component has four hinge seats, which are arranged at 90° intervals in the circumferential direction of the rotating sleeve.

[0010] Preferably, the hinge base consists of two parallel vertical plates mounted parallel to each other on a fixed plate. A hinge hole is opened on the vertical plate, and a pin is inserted into the hinge hole. A pin hole is opened at the end of the crusher, and the pin hole is sleeved outside the pin.

[0011] Preferably, a swing rod is provided on the fixed plate, the swing rod is installed on the fixed plate and is arranged parallel to the two upright plates. The crushing blade includes a connecting rod with one end passing through the two upright plates and rotatably connected between the two upright plates, a movable blade detachably installed on the end of the connecting rod away from the hinge seat, and a limiting structure for limiting the swing angle of the connecting rod. A swing groove is opened on the rod body at the end of the connecting rod passing through the two upright plates and is rotatably sleeved on the swing rod. A limiting groove with an arc in the length direction is opened on the groove wall of the swing groove, and the arc length of the limiting groove corresponds to the swing angle range of the crushing blade. A limiting shaft that is movably inserted in the limiting groove passes through the end of the swing rod.

[0012] Preferably, two fixed blades are fixed on the inner wall of the housing. The two fixed blades are located above the filter screen on both sides symmetrically. The cutting edges of the fixed blades face the inner wall of the crushing chamber. The cutting edges of the crushing blades are arc-shaped, and the radius of the arc surface of the arc-shaped cutting edge matches the radius of the inner wall of the housing. A gap is left between the arc-shaped cutting edge and the inner wall of the housing.

[0013] Preferably, the transmission assembly includes a motor with a drive pulley mounted on its output end, a driven pulley mounted on one end of an eccentric shaft, and a belt sleeved on the drive pulley and the driven pulley.

[0014] Preferably, the number of crushing blades is arranged in five groups along the axial direction of the rotating sleeve, with each group containing four crushing blades, for a total of twenty crushing blades.

[0015] The beneficial effects of this invention are: 1. The eccentric shaft drives the rotating sleeve to revolve, while the rotation constraint component forces the rotating sleeve to rotate around its own axis during the revolution. The cutting blade undergoes a combined revolution and rotation motion with the rotating sleeve, and its cutting edge trajectory is cycloidal. The cycloidal trajectory causes the tangential velocity of the cutting blade relative to the fixed blade to increase twice in each revolution cycle, forming impact shearing that directly cuts the tough plastic rather than squeezing and sliding it. At the same time, the periodic change in tangential velocity causes the force direction at the root of the cutting blade to change alternately, and the entangled material is released from the hinge point under the alternating force.

[0016] 2. The rotation constraint component adopts a fixed internal gear ring and planetary gear meshing structure. The fixed internal gear ring is coaxially fixed to the inner wall of the crushing chamber, and the planetary gear is fixed to the end of the rotating sleeve. When the eccentric shaft drives the rotating sleeve to revolve, the planetary gear rolls along the fixed internal gear ring, forcing the rotating sleeve to generate a rotation with a certain speed ratio. No additional motor or sensor control is required, and the transmission is reliable and impact-free.

[0017] 3. The ratio of the number of teeth on the fixed internal gear ring to the number of teeth on the planetary gear is 2:1, so that the rotating sleeve rotates twice when it revolves once. At this speed ratio, the cutting blade passes through the fixed blade area twice in each revolution cycle, and the rotation phases of the two passes are 180° apart. The tangential velocity of the cutting blade reaches its maximum and second maximum values ​​in the two shearing operations, respectively. At the same time, the cutting directions of the two shearing operations are opposite, realizing bidirectional variable speed shearing.

[0018] 4. The four hinge seats in each crushing component are arranged at 90° intervals on the circumference of the rotating sleeve, so that the crushing blades are evenly distributed in the circumference and the rotating sleeve is balanced by forces during its revolution and rotation, avoiding eccentric vibration.

[0019] 5. The hinged base consists of two parallel vertical plates. The breaker blade is hinged between the two plates via a pin, resulting in a compact structure. A swing rod is installed on the fixed plate, and a swing groove is formed on the connecting rod. An arc-shaped limiting groove is set within the swing groove. The limiting groove and the swing rod cooperate to limit the swing angle range of the breaker blade. This structure ensures that the breaker blade can only swing within a preset angle under the action of centrifugal force and gravity, avoiding excessive outward swing and collision with the inner wall of the housing. At the same time, the arc length of the limiting groove can precisely control the extension amount of the blade. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a simplified structural diagram of the recycled plastic recycling device proposed in this invention.

[0021] Figure 2 This is a bottom view of the structure of the recycled plastic recycling device proposed in this invention.

[0022] Figure 3 This is a schematic diagram of the internal structure of the recycled plastic recycling device proposed in this invention.

[0023] Figure 4 This is a schematic diagram of the unfolded section of the recycled plastic recycling device proposed in this invention.

[0024] Figure 5 This is a schematic diagram of the crushing component structure of the present invention.

[0025] Figure 6 This is a schematic diagram of the eccentric shaft structure of the present invention.

[0026] Figure 7 This is a schematic diagram of the crushing component of the present invention installed on an eccentric shaft structure.

[0027] Figure 8 This is a schematic diagram of the crusher blade structure of the present invention.

[0028] Figure 9 This is a schematic diagram of the unfolded structure of the crushing blade of the present invention.

[0029] In the diagram: 1. Crushing box; 2. Feed hopper; 3. Filter screen; 4. Eccentric shaft; 5. Driven pulley; 6. Driven pulley; 7. Motor; 8. Fixed blade; 9. Moving blade; 10. Connecting rod; 11. Swing groove; 12. Swing rod; 13. Limiting shaft; 14. Limiting groove; 15. Fixed internal gear ring; 16. Planetary gear; 17. Hinge seat. Detailed Implementation

[0030] To make the technical means, creative features, achieved objectives, and effects of this invention readily understandable, the invention is further described below with reference to specific embodiments and accompanying drawings. However, the following embodiments are merely preferred embodiments of this invention and not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments described herein without creative effort are all within the protection scope of this invention.

[0031] Example 1: Reference Figures 1-9The device for recycling recycled plastics includes a crushing mechanism for crushing and recycling recycled plastics. The crushing mechanism is characterized by comprising a crushing box 1 with a feeding bin 2 at the top, an eccentric shaft 4 passing through the crushing box 1, a rotating sleeve rotatably sleeved on the eccentric section, multiple crushing components installed on the side of the rotating sleeve, a rotation constraint component installed on the crushing box and controlling the rotating sleeve to rotate around its own axis when the eccentric shaft 4 drives the rotating sleeve to revolve, and a transmission component that drives the eccentric shaft 4 to rotate unidirectionally. The eccentric shaft 4 is composed of shafts at both ends and a shaft body located in the middle. The middle shaft body is the eccentric section, and the axis of the eccentric section is offset parallel to the axis of the shafts at both ends. The shafts at both ends are rotatably installed on the crushing box 1. Multiple crushing components are arranged and installed at equal intervals along the axial direction of the rotating sleeve. Each crushing component includes multiple hinge seats 17 that are installed at equal intervals around the axial direction of the rotating sleeve on the side of the rotating sleeve, a crushing blade that is rotatably installed on the hinge seat 17 at one end, and a filter screen 3 installed below the crushing blade.

[0032] In this embodiment, motor 7 drives eccentric shaft 4 to rotate in one direction. The eccentric section of eccentric shaft 4 drives rotating sleeve to revolve, while the rotation constraint component forces rotating sleeve to rotate around its own axis. The hinge seat 17 and crushing blade fixed to the side of rotating sleeve perform a compound motion of revolution and rotation with rotating sleeve. The trajectory of crushing blade edge is cycloidal. Plastic material falls from feed bin 2 into crushing box 1. During revolution, crushing blade periodically passes through the fixed blade area above filter screen 3. Its tangential velocity increases instantaneously due to the superposition of rotation, forming impact shear on tough plastic. The crushed particles pass through filter screen 3 and are discharged from the bottom of crushing box 1. The force direction of the root of crushing blade changes periodically under the alternating action of revolution and rotation. Plastic fibers wrapped around hinge seat 17 are automatically peeled off and re-enter the shearing zone, thereby achieving bidirectional variable speed shearing and anti-entanglement under unidirectional drive. The eccentric shaft 4 drives the rotating sleeve to revolve and force it to rotate, causing the crushing blade to generate a cycloidal motion trajectory. This allows for bidirectional impact shearing without the need for motor reversal. At the same time, the periodic change in the direction of force actively removes entangled materials, improving crushing efficiency and operational stability.

[0033] It is understandable that the rotation of the eccentric shaft 4 can be forced to rotate around its own axis when it revolves around the central axis. This embodiment provides the following solution: like Figure 6 As shown, the rotation constraint assembly includes a fixed internal gear ring 15 coaxially sleeved on the shaft and fixed to the inner wall of the crushing box 1, and a planetary gear 16 fixedly installed on the end of the rotating sleeve. The planetary gear 16 passes through the fixed internal gear ring 15 and meshes with the fixed internal gear ring 15. The number of teeth of the fixed internal gear ring is greater than the number of teeth of the planetary gear 16.

[0034] In this embodiment, when the eccentric shaft 4 drives the rotating sleeve to revolve, the planetary gear 16 fixed to the end of the rotating sleeve rolls within the fixed internal gear ring 15 fixed to the inner wall of the crushing chamber 1. Since the number of teeth on the fixed internal gear ring 15 is greater than the number of teeth on the planetary gear 16, the planetary gear 16 is forced to rotate around its own axis, thereby driving the rotating sleeve to rotate on its own axis while revolving around the central axis. A fixed speed ratio transmission of revolution and rotation is achieved through pure mechanical meshing, eliminating the need for motor reversal or additional sensors. This allows the crushing blade to obtain the composite motion required for a cycloidal motion trajectory, resulting in a reliable structure with no control delay.

[0035] For the transmission between the fixed internal gear ring 15 and the planetary gear 16, this embodiment provides the following solution: The ratio of the number of teeth on the fixed internal gear ring to the number of teeth on the planetary gear 16 is 2:1. The rotating sleeve rotates twice on its own axis while completing one revolution. During one revolution of the rotating sleeve driven by the eccentric shaft 4, the planetary gear 16 rolls along the fixed internal gear ring 15. Because the ratio of the number of teeth on the fixed internal gear ring to the number of teeth on the planetary gear 16 is 2:1, the planetary gear 16 rotates twice around its own axis, causing the rotating sleeve to complete two rotations on its own axis while completing one revolution. This tooth ratio ensures that the breaker blade passes through the fixed blade area twice in each revolution cycle, with a 180° phase difference in rotation between the two passes. The tangential velocity of the breaker blade reaches its maximum and second maximum values ​​in the two shearing operations, respectively, and the cutting directions of the two shearing operations are opposite, achieving bidirectional variable-speed shearing.

[0036] A needle roller bearing is installed between the rotating sleeve and the shaft of the eccentric section. The inner diameter of the rotating sleeve is larger than the outer diameter of the eccentric section. When the eccentric shaft 4 rotates, the eccentric section moves inside the rotating sleeve. The needle roller bearing installed between the rotating sleeve and the eccentric section converts the sliding friction between them into rolling friction. The gap formed by the inner diameter of the rotating sleeve being larger than the outer diameter of the eccentric section provides installation space for the needle roller bearing and allows the rotating sleeve to rotate freely relative to the axis of the eccentric section. This structure reduces the frictional resistance during the revolution and rotation of the rotating sleeve, reduces power loss, and avoids direct contact between the eccentric section and the inner wall of the rotating sleeve, which can cause wear and jamming.

[0037] like Figure 5 and Figure 7 As shown, each crushing assembly has four hinge seats 17, which are arranged at 90° intervals in the circumferential direction of the rotating sleeve.

[0038] In this embodiment, when the eccentric shaft 4 drives the rotating sleeve to rotate, the four hinge seats 17 are evenly distributed at 90° intervals along the circumference of the rotating sleeve, allowing the four crushing blades mounted on the hinge seats 17 to alternately enter the fixed blade area. This arrangement causes the centrifugal forces of the rotating sleeve in its combined revolution and rotation to cancel each other out in the circumferential direction, resulting in smooth operation of the rotating sleeve without eccentric vibration. At the same time, one crushing blade cuts into the material every 90° of rotation, forming a continuous and uniform shearing rhythm.

[0039] like Figures 6-9 As shown, the hinge base 17 consists of two parallel vertical plates mounted parallel to each other on the fixed plate. A hinge hole is formed on the vertical plate, through which a pin passes. A pin hole is formed at the end of the crushing blade, and the pin hole is fitted over the pin. A swing rod 12 is provided on the fixed plate, mounted on the fixed plate and arranged parallel to the two vertical plates. The crushing blade includes a connecting rod 10, one end of which passes through the two vertical plates and is rotatably connected between them; a movable blade 9 detachably mounted on the end of the connecting rod 10 away from the hinge base 17; and a limiting structure that restricts the swing angle of the connecting rod 10. A swing groove 11, rotatably fitted onto the swing rod 12, is formed on the end of the connecting rod 10 passing through the two vertical plates. A limiting groove 14, arc-shaped in the length direction, is formed on the groove wall of the swing groove 11, and the arc length of the limiting groove 14 corresponds to the swing angle range of the crushing blade. A limiting shaft 13, movably passing through the limiting groove 14, extends through the end of the swing rod 12.

[0040] In this embodiment, when the eccentric shaft 4 drives the rotating sleeve to rotate, the connecting rod 10 of the crusher blade rotates around the pin on the vertical plate of the hinge seat 17. The swing rod 12, fixed on the fixed plate, extends into the swing groove 11 of the connecting rod 10. The limiting shaft 13 passes through the end of the swing rod 12 and enters the arc-shaped limiting groove 14 on the wall of the swing groove 11. During the swing of the connecting rod 10, the limiting shaft 13 slides along the arc of the limiting groove 14. When the limiting shaft 13 touches one end of the limiting groove 14, the connecting rod 10 stops swinging, thereby limiting the swing angle of the moving blade 9 within the range corresponding to the arc length of the limiting groove 14, preventing the moving blade 9 from hitting the inner wall of the housing or retracting excessively due to excessive centrifugal force and thus failing. Through the cooperation of the swing groove 11, the limiting groove 14 and the limiting shaft 13, the rigid limiting of the swing angle of the moving blade 9 is achieved without the need for elastic elements, ensuring that the crusher blade enters the shearing zone with a controllable extension amount in each rotation cycle.

[0041] like Figures 1-5 As shown, two fixed blades 8 are fixed on the inner wall of the housing. The two fixed blades 8 are located above the filter screen 3 on both sides symmetrically. The cutting edge of the fixed blade 8 faces the inner wall of the crushing box 1. The cutting edge of the crushing blade is an arc-shaped cutting edge. The radius of the arc surface of the arc-shaped cutting edge matches the radius of the inner wall of the housing. There is a gap between the arc-shaped cutting edge and the inner wall of the housing.

[0042] In this embodiment, during the revolution and rotation of the rotating sleeve, the arc-shaped cutting edge of the crusher periodically passes over two fixed blades 8 symmetrically positioned above the filter screen 3 on both sides. The cutting edges of the fixed blades 8 face the inner wall of the crushing chamber 1, forming a shearing pair with the arc-shaped cutting edge of the crusher. Because the radius of the arc-shaped cutting edge matches the radius of the inner wall of the shell and leaves a gap, the cutting edge of the crusher intersects with the cutting edge of the fixed blade 8 when it approaches, cutting off the material. The crushed particles fall onto the filter screen 3. The material that does not pass through the filter screen 3 is thrown up again by the subsequent crusher and pushed to the fixed blade 8 on the other side for secondary shearing. This structure utilizes two symmetrically arranged fixed blades 8 to complete two shearing operations in each revolution cycle. The gap between the arc-shaped cutting edge and the inner wall of the shell ensures that the crusher does not impact the shell, while the matching radius of the arc surface causes the shearing point to move along the cutting edge, avoiding localized wear.

[0043] The transmission assembly includes a motor 7 with a drive pulley 6 mounted on its output end, a driven pulley 5 mounted on one end of an eccentric shaft 4, and a belt fitted onto the drive pulley 6 and the driven pulley 5.

[0044] like Figure 5 and Figure 7 As shown, the number of crushing blades is arranged in five groups along the axial direction of the rotating sleeve, with each group containing four crushing blades, for a total of twenty crushing blades.

[0045] In this embodiment, when the eccentric shaft 4 drives the rotating sleeve to rotate, the five sets of crushing components arranged along the axial direction of the rotating sleeve move synchronously. In each set, four crushing blades cut into the material sequentially at 90° intervals in the circumferential direction. A total of twenty crushing blades are arranged to fully cover the material along the axial direction inside the crushing box 1. After the material falls into the feed bin 2, it is pushed to the fixed blade area by at least one set of crushing blades regardless of its axial position. This five-set axial arrangement creates a continuous shearing band inside the crushing box 1, avoiding axial dead zones. At the same time, the uniform distribution of four crushing blades in each set ensures the dynamic balance of the rotating sleeve, and the alternating shearing of the twenty crushing blades increases the shearing frequency per unit time.

[0046] The usage process of this invention is as follows: Before starting, check that the filter screen 3 is installed at the bottom of the crushing box 1 and that the discharge port is unobstructed. Confirm that all twenty crushing blades are normally limited by the connecting rod 10 and the limiting shaft 13. The rotating sleeve is sleeved on the eccentric section of the eccentric shaft 4 through the needle roller bearing, and the planetary gear 16 is engaged with the fixed internal gear ring 15. Start the motor to drive the eccentric shaft 4 to rotate unidirectionally around the axis of its two ends through the belt. The eccentric section of the eccentric shaft 4 drives the rotating sleeve to revolve. At the same time, the planetary gear 16 rolls along the fixed internal gear ring 15, forcing the rotating sleeve to rotate around its own axis during the revolution, and rotating twice on its own axis for every revolution. The recycled plastic to be recycled is continuously fed into the crushing box 1 from the feed hopper 2. The material falls above the filter screen 3 and onto the movement path of the crushing blades under the action of gravity. When the rotating sleeve revolves and rotates, the twenty crushing blades move alternately in five groups along the axial direction and four groups around the circumference. The connecting rod 10 of each crushing blade... The moving blade 9 swings around the pin on the hinge seat 17. The limiting shaft 13 slides along the limiting groove 14 to limit the swing angle of the moving blade 9 within a safe range. When the arc-shaped cutting edge of the moving blade 9 moves with the rotating sleeve to the fixed blade 8 above the symmetrical sides of the filter screen 3, it forms a shearing pair with the cutting edge of the fixed blade 8. The cycloidal motion trajectory causes the tangential velocity to increase instantaneously, cutting the plastic. The crushed particles pass through the filter screen 3 and are discharged from the bottom of the crushing box 1. Large pieces of material that do not pass through the filter screen 3 are thrown up again by the subsequent crushing blades and pushed to the fixed blade 8 on the other side for secondary shearing. Under the combined motion of revolution and rotation, the force direction at the root of the crushing blade changes periodically. The plastic fibers wrapped around the hinge seat 17 or the connecting rod 10 are automatically peeled off and re-enter the shearing zone. The motor keeps rotating continuously in one direction until all plastic is recycled. After stopping, wait for all the material in the crushing box 1 to be discharged before opening it to check the wear of the crushing blade.

[0047] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A recycled plastic recycling device, comprising a crushing mechanism for crushing and recycling recycled plastic, characterized in that, The crushing mechanism includes a crushing box (1) with a feed bin (2) on top, an eccentric shaft (4) passing through the crushing box (1), a rotating sleeve rotatably mounted on the eccentric section, multiple crushing components installed on the side of the rotating sleeve, a rotation constraint component set on the crushing box and controlling the eccentric shaft (4) to drive the rotating sleeve to rotate around its own axis when it revolves around the center, and a transmission component that drives the eccentric shaft (4) to rotate in one direction. The eccentric shaft (4) consists of shafts at both ends and a shaft body in the middle. The middle shaft body is the eccentric section, and the axis of the eccentric section is offset parallel to the axis of the shafts at both ends. The shafts at both ends are rotatably mounted on the crushing box (1). Multiple crushing components are arranged and installed at equal intervals along the axial direction of the rotating sleeve. Each crushing component includes multiple hinge seats (17) that are installed at equal intervals around the axial direction of the rotating sleeve on the side of the rotating sleeve, a crushing blade that is rotatably installed on the hinge seat (17) at one end, and a filter screen (3) installed below the crushing blade.

2. The recycled plastic recycling device according to claim 1, characterized in that: The self-rotation constraint assembly includes a fixed internal gear ring (15) coaxially sleeved on the shaft and fixed to the inner wall of the crushing box (1) and a planetary gear (16) fixedly installed on the end of the rotating sleeve. The planetary gear (16) passes through the fixed internal gear ring (15) and meshes with the fixed internal gear ring (15). The number of teeth of the fixed internal gear ring (15) is greater than the number of teeth of the planetary gear (16).

3. The recycled plastic recycling device according to claim 2, characterized in that: The ratio of the number of teeth of the fixed internal gear ring to the number of teeth of the planetary gear (16) is 2:1, and the rotating sleeve rotates twice when it revolves once.

4. The recycled plastic recycling device according to claim 1, characterized in that: A needle roller bearing is installed between the rotating sleeve and the shaft of the eccentric section, and the inner diameter of the rotating sleeve is larger than the outer diameter of the eccentric section.

5. The recycled plastic recycling device according to claim 1, characterized in that: In each crushing assembly, there are four hinge seats (17), which are arranged at 90° intervals in the circumferential direction of the rotating sleeve.

6. The recycled plastic recycling device according to claim 1, characterized in that: The hinge seat (17) consists of two parallel vertical plates mounted on a fixed plate. A hinge hole is opened on the vertical plate, and a pin is inserted into the hinge hole. A pin hole is opened at the end of the crusher, and the pin hole is sleeved outside the pin.

7. The recycled plastic recycling device according to claim 6, characterized in that: A swing rod (12) is provided on the fixed plate. The swing rod (12) is installed on the fixed plate and is arranged parallel between the two vertical plates. The crushing knife includes a connecting rod (10) that passes through the two vertical plates and is rotatably connected between the two vertical plates, a movable knife (9) that is detachably installed on the end of the connecting rod (10) away from the hinge seat (17), and a limiting structure that limits the swing angle of the connecting rod (10). A swing groove (11) is opened on the rod body of the connecting rod (10) that passes through the two vertical plates and is rotatably sleeved on the swing rod (12). A limiting groove (14) with an arc in the length direction is opened on the groove wall of the swing groove (11). The arc length of the limiting groove (14) corresponds to the swing angle range of the crushing knife. A limiting shaft (13) that is movably inserted in the limiting groove (14) passes through the end of the swing rod (12).

8. The recycled plastic recycling device according to claim 1, characterized in that: Two fixed blades (8) are fixed on the inner wall of the housing. The two fixed blades (8) are located above the filter screen (3) on both sides. The blades of the fixed blades (8) face the inner wall of the crushing box (1). The blades of the crushing blades are arc-shaped. The radius of the arc surface of the arc-shaped blade matches the radius of the inner wall of the housing. There is a gap between the arc-shaped blade and the inner wall of the housing.

9. The recycled plastic recycling device according to claim 1, characterized in that: The transmission assembly includes a motor (7) with a drive pulley (6) mounted on the output end, a driven pulley (5) mounted on one end of an eccentric shaft (4), and a belt fitted on the drive pulley (6) and the driven pulley (5).

10. The recycled plastic recycling device according to claim 1, characterized in that: The number of crushing blades is arranged in five groups along the axis of the rotating sleeve, with each group containing four crushing blades, for a total of twenty crushing blades.

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