A device for recycling waste rubber

Abstract

The application relates to the technical field of rubber recycling, in particular to a waste rubber recycling device, which comprises a rack, a crushing box is arranged on the rack, a feeding port is arranged above the crushing box, two groups of symmetrical crushing rollers are rotationally arranged in the crushing box and are used for crushing waste rubber by extrusion, a mounting frame is slidably arranged below the crushing box on the rack, a connecting rod is rotationally arranged on the mounting frame, and a crank is fixed on the driving shaft of the crushing roller. The crank drives the connecting rod, the connecting rod pushes the mounting frame to slide back and forth along the guide rod, so that the first sieve frame and the second sieve frame move together, the crushing roller crushes rubber on one side and provides power required for sieving on the other side, an additional vibration driving device is omitted, and the manufacturing cost and the failure possibility of the whole machine are reduced.

Description

Technical Field

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

[0002] In the field of mechanical technology for waste rubber recycling, with the continuous expansion of the global automotive industry and the consumption of rubber products, the amount of waste tires, rubber scraps, and discarded rubber products generated annually is enormous. Their long-term accumulation not only occupies valuable land resources but also forms "black pollution" due to its difficulty in natural degradation, posing a serious threat to the ecological environment. At the same time, rubber, as a non-renewable polymer material, still possesses extremely high secondary utilization value due to its internal elements such as carbon, oxygen, and sulfur, as well as additives such as carbon black and steel wire. Therefore, converting waste rubber into rubber powder or granules through physical means such as mechanical crushing, grinding, and screening has become the mainstream technical approach for resource recycling.

[0003] In the field of waste rubber recycling, traditional crushing equipment typically uses multi-stage crushing or independent screening systems to control the particle size of rubber blocks and powders. However, in existing technologies, the crushing and screening processes are often placed in different workstations or require additional drive mechanisms to vibrate the screens, resulting in low equipment integration, high energy consumption, and large footprint. Furthermore, the crushing rollers only perform the crushing function, and their rotational kinetic energy is not fully utilized. Common vibrating screening devices require separate configuration of excitation motors or eccentric wheel mechanisms, which not only increases manufacturing costs and potential failure points but also easily generates noise and dust leakage. Therefore, how to simplify the equipment structure, reduce energy consumption, and improve the integration of crushing and screening has become an urgent problem to be solved in this field. Summary of the Invention

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a waste rubber recycling device, which solves the problems mentioned in the background section.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, the present invention provides the following technical solution: a waste rubber recycling device, including a frame, a crushing bin on the frame, a feed inlet above the crushing bin, two sets of symmetrically distributed crushing rollers rotatably arranged inside the crushing bin for crushing waste rubber, and a mounting frame slidably installed on the frame below the crushing bin.

[0008] A connecting rod is rotatably mounted on the mounting frame, and a crank is fixed on the drive shaft of the crushing roller. The free end of the crank is rotatably connected to the connecting rod to convert the rotational motion of the drive shaft into the reciprocating sliding motion of the mounting frame. A first screening frame is slidably arranged inside the mounting frame, and a second screening frame is slidably arranged on the first screening frame for grading and screening the crushed rubber particles.

[0009] Preferably, both sets of crushing rollers are rotatably connected to the crushing box via their respective drive shafts. Both sets of drive shafts are fixedly fitted with meshing gears. The two sets of gears have the same number of teeth, which are used to make the two sets of crushing rollers rotate in opposite directions at the same speed, thereby forming a uniform extrusion and shearing force on the waste rubber entering between the two crushing rollers.

[0010] Preferably, at least one horizontally arranged guide rod is fixedly installed inside the frame, and the mounting frame has a guide hole that matches the guide rod. The mounting frame is slidably connected to the guide rod through the guide hole. The guide rod is used to constrain the reciprocating sliding trajectory of the mounting frame in the horizontal direction and prevent the mounting frame from deviating or shaking during movement.

[0011] Preferably, two sets of symmetrically distributed springs are sleeved on the guide rod. The two sets of springs are located on opposite sides of the mounting frame. One end of each set of springs is fixedly connected to the mounting frame, and the other end is fixedly connected to the end of the guide rod. The two sets of springs are used to provide rebound force and buffer force respectively during the reciprocating sliding process of the mounting frame, so that the movement of the mounting frame is more stable.

[0012] Preferably, a sliding sleeve is installed between the first screening frame and the mounting frame. The sliding sleeve includes an inner tube and an outer tube that are nested together. One end of the inner tube is fixedly connected to the first screening frame, and one end of the outer tube is fixedly connected to the mounting frame. The sliding sleeve is used to guide the sliding direction of the first screening frame relative to the mounting frame and limit its sliding stroke.

[0013] Preferably, a disc spring is fitted onto the sliding sleeve tube. One end of the disc spring is fixedly connected to the inner tube end of the sliding sleeve tube, and the other end of the disc spring is fixedly connected to the outer tube end of the sliding sleeve tube. The disc spring is used to generate elastic vibration on the first screening frame when the mounting frame slides back and forth, thereby assisting the rubber particles on the screening frame to pass through the screen quickly.

[0014] Preferably, a lead screw is provided inside the first screening frame along its sliding direction. The two ends of the lead screw pass through the opposite side walls of the first screening frame and are rotatably connected to the first screening frame through rolling bearings. One end of the lead screw extends to the outside of the first screening frame and is provided with a screwing part for manually driving the lead screw to rotate.

[0015] Preferably, the second screen frame has a threaded hole that matches the lead screw. The lead screw passes through the threaded hole and forms a threaded transmission connection with the second screen frame. By rotating the lead screw, the second screen frame can be driven to slide relative to the first screen frame, thereby adjusting the degree of misalignment of the screen holes between the first screen frame and the second screen frame.

[0016] Preferably, the crank has a rod-shaped structure, with one end fixedly sleeved on the drive shaft and rotating synchronously with the drive shaft. The free end of the crank is rotatably connected to one end of the connecting rod through a rotating shaft. The other end of the connecting rod is rotatably mounted on the mounting frame. The drive shaft, crank, connecting rod, and mounting frame together constitute a connecting rod rocker mechanism, which is used to convert the continuous rotational motion of the drive shaft into the reciprocating linear motion of the mounting frame.

[0017] Preferably, both the first and second screening frames are mesh plate structures, wherein the screen aperture of the first screening frame is larger than that of the second screening frame. When the mounting frame slides back and forth, it drives the first and second screening frames to move synchronously. At the same time, the elastic vibration generated by the disc spring causes the first screening frame to generate high-frequency micro-amplitude vibration relative to the mounting frame, so as to enhance the screening effect.

[0018] (III) Beneficial Effects

[0019] Compared with the prior art, the present invention provides a waste rubber recycling device, which has the following beneficial effects:

[0020] By directly converting the rotational motion of the crushing roller into the reciprocating sliding motion of the screening frame, a separate motor or vibrator is no longer needed for the screening section. Specifically, a crank is fixed on the drive shaft, the crank drives the connecting rod, and the connecting rod pushes the mounting frame to slide back and forth along the guide rod, so that the first and second screening frames move together. In this way, the crushing roller crushes the rubber while providing the power required for screening, eliminating the need for an additional vibration drive device, reducing the overall manufacturing cost and the possibility of failure, and also reducing power consumption and equipment footprint.

[0021] By installing a sliding sleeve and disc spring between the first screening frame and the mounting frame, the disc spring generates elastic vibration when the mounting frame slides back and forth. This causes the first screening frame to vibrate at a high frequency and with a small amplitude relative to the mounting frame, helping the rubber particles on the screen to pass through the screen faster and preventing clogging. At the same time, the second screening frame can be adjusted by a screw to change the degree of misalignment between its screen holes and the first screening frame, thereby changing the actual particle size being screened. It can adapt to different particle size requirements without replacing the screen. The entire device integrates crushing, transmission, screening, and adjustment functions, resulting in a more compact structure and smoother operation. Attached Figure Description

[0022] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram showing the structural separation of the frame and mounting bracket of the present invention;

[0025] Figure 3 This is a schematic diagram of the connecting rod and crank of the present invention;

[0026] Figure 4 This is a side view of the entire invention;

[0027] Figure 5 This is a schematic diagram showing the structural separation of the mounting frame, the first screening frame, and the second screening frame of the present invention;

[0028] Figure 6 This is a schematic diagram showing the separation of the first and second screening frames of the present invention.

[0029] In the diagram: 1. Frame; 2. Feed inlet; 3. Mounting frame; 4. Drive shaft; 5. Crushing roller; 6. Gear; 7. Crank; 8. Connecting rod; 9. Guide rod; 10. Spring; 11. First screen frame; 12. Second screen frame; 13. Sliding sleeve; 14. Disc spring; 15. Lead screw; 16. Crushing box. Detailed Implementation

[0030] The following will describe in detail the implementation of this application with reference to the accompanying drawings and embodiments, so that the implementation process of how this application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0031] Figures 1-6In one embodiment of the present invention, a waste rubber recycling device includes a frame 11, on which a crushing bin 16 is mounted. A feed inlet 2 is located above the crushing bin 16. Two sets of symmetrically distributed crushing rollers 5 are rotatably mounted inside the crushing bin 16 for crushing and compressing the waste rubber. A mounting frame 3 is slidably mounted on the frame 11 below the crushing bin 16. A connecting rod 8 is rotatably mounted on the mounting frame 3. A crank 7 is fixed to the drive shaft 4 of the crushing rollers 5, and the free end of the crank 7 is rotatably connected to the connecting rod 8, converting the rotational motion of the drive shaft 4 into the reciprocating sliding motion of the mounting frame 3. A first screening frame 11 is slidably mounted inside the mounting frame 3, and a second screening frame 12 is slidably mounted on the first screening frame 11 for grading and screening the crushed rubber particles. After the equipment is started, waste rubber is fed into the crushing bin 16 through the feed inlet 2 and falls between the two sets of crushing rollers 5. Driven by the drive shaft 4, the crushing roller 5 rotates relative to the screen, squeezing and crushing the rubber, tearing it into particles of varying sizes. The crushed rubber particles fall downwards under gravity onto the first screen frame 11 inside the mounting frame 3. At the same time, the drive shaft 4 rotates, driving the crank 7 fixed on it to rotate as well. The free end of the crank 7 pulls the connecting rod 8 through the rotating shaft. The other end of the connecting rod 8 is mounted on the mounting frame 3. Therefore, the swing of the connecting rod 8 will push the mounting frame 3 to slide back and forth along the frame 11. When the mounting frame 3 slides, it drives the first screen frame 11 and the second screen frame 12 to move together, causing the rubber particles falling on the screen to continuously tumble and move. Small particles fall through the screen holes, while large particles remain on the screen surface and continue to move forward or are bounced back. In this way, the crushing roller 5 completes the crushing work while providing power for the screening below. There is no need to equip the screen with a separate motor. The power of the whole device is fully utilized, and the structure is more compact.

[0032] In this embodiment, reference Figure 2 , Figure 3 and Figure 4As shown, both sets of crushing rollers 5 are rotatably connected to the crushing box 16 via their respective drive shafts 4. Gears 6, which mesh with each other, are fixedly fitted onto both sets of drive shafts 4. The two sets of gears 6 have the same number of teeth, used to cause the two sets of crushing rollers 5 to rotate in opposite directions at the same speed, thereby creating a uniform extrusion and shearing force on the waste rubber entering between the two crushing rollers 5. When the drive shaft 4 rotates, the gears 6 fitted onto the drive shaft 4 rotate accordingly. Since the two sets of gears 6 mesh with each other and have the same number of teeth, the rotation of one gear 6 will drive the other gear 6 to rotate in the opposite direction at the same speed. The gear set 6 then transmits power to its respective drive shaft 4, causing the two drive shafts 4 to drive the two sets of crushing rollers 5 to rotate in opposite directions at the same speed. This design ensures that the waste rubber falling between the two rollers is subjected to uniform extrusion pressure from both sides. At the same time, since the two rollers rotate at the same speed but in opposite directions, the rubber is also subjected to shearing action when passing through the roller gap. Compared with the case of inconsistent speeds, this equal speed and opposite direction configuration can make the rubber be torn more evenly, and the size of the crushed particles is more consistent. This reduces the number of times large pieces of material are returned to the furnace for re-crushing in subsequent screening and improves the overall crushing efficiency.

[0033] At least one horizontally arranged guide rod 9 is fixedly installed inside the frame 11. The mounting frame 3 has guide holes that match the guide rod 9. The mounting frame 3 is slidably connected to the guide rod 9 through the guide holes. The guide rod 9 constrains the reciprocating sliding trajectory of the mounting frame 3 in the horizontal direction, preventing the mounting frame 3 from shifting or swaying during movement. Two sets of symmetrically distributed springs 10 are sleeved on the guide rod 9. The two sets of springs 10 are located on opposite sides of the mounting frame 3. One end of each spring 10 is fixedly connected to the mounting frame 3, and the other end is fixedly connected to the end of the guide rod 9. The two sets of springs 10 provide rebound force and buffer force respectively during the reciprocating sliding of the mounting frame 3, making the movement of the mounting frame 3 more stable. When the mounting frame 3 reciprocates under the push of the connecting rod 8, without guide constraint, it is easy for it to sway left and right or jump up and down due to inertia or uneven force, causing the screening frame to shake excessively. Large slack can affect screening efficiency and even cause component jamming or damage. The guide rod 9 is horizontally fixed inside the frame 11, and the mounting frame 3 is fitted onto the guide rod 9 through the guide hole, which is equivalent to setting a fixed track for the mounting frame 3. The mounting frame 3 can only slide back and forth along the direction of the guide rod 9, and the movement trajectory is firmly restricted. At the same time, two sets of springs 10 installed on the guide rod 9 are located on both sides of the mounting frame 3. When the mounting frame 3 slides to one side, the spring 10 on that side is compressed and stores elastic potential energy, while the spring 10 on the other side is stretched and generates a pull force. When the thrust of the connecting rod 8 weakens or reverses, the spring 10 releases the stored energy, helping the mounting frame 3 return to the middle position or turn in the opposite direction. In this way, the spring 10 not only plays a buffering role, avoiding rigid impact of the mounting frame 3 at the moving end point, but also provides a rebound force, making the reciprocating motion smoother and more stable, reducing vibration and noise, and also reducing the wear of various connecting parts.

[0034] A sliding sleeve 13 is installed between the first screening frame 11 and the mounting frame 3. The sliding sleeve 13 includes an inner tube and an outer tube that are nested together. One end of the inner tube is fixedly connected to the first screening frame 11, and one end of the outer tube is fixedly connected to the mounting frame 3. The sliding sleeve 13 guides the sliding direction of the first screening frame 11 relative to the mounting frame 3 and limits its sliding stroke. A disc spring 14 is sleeved on the sliding sleeve 13. One end of the disc spring 14 is fixedly connected to the end of the inner tube of the sliding sleeve 13, and the other end of the disc spring 14 is fixedly connected to the end of the outer tube of the sliding sleeve 13. The disc spring 14 generates elastic vibration on the first screening frame 11 when the mounting frame 3 reciprocates, assisting the rubber particles on the screening frame to pass through the screen quickly. When the mounting frame 3 reciprocates, the first screening frame 11 is not completely rigidly fixed to the mounting frame 3, but forms a relatively slidable connection with the mounting frame 3 through the sliding sleeve 13. The inner tube of the sliding sleeve 13 is fixed to the first screening frame 11. The outer tube is fixed to the mounting frame 3, and the inner tube can extend and retract inside the outer tube. This allows the first screening frame 11 to slide up and down or back and forth relative to the mounting frame 3 with a small amplitude. At the same time, the sliding direction is restricted by the sliding sleeve 13, preventing deviation. More importantly, the disc spring 14, which is sleeved on the outside of the sliding sleeve 13, is continuously compressed and released during the movement of the mounting frame 3. When the mounting frame 3 accelerates or decelerates, the elasticity of the disc spring 14 causes the first screening frame 11 to generate a high-frequency, micro-amplitude vibration relative to the mounting frame 3, similar to gently shaking a sieve by hand. This vibration causes the rubber particles on the screen to be constantly thrown up and then falling down, making it easier for small particles to pass through the screen holes. Particles stuck at the edge of the screen holes will also fall off due to the vibration, thus effectively reducing the phenomenon of clogging. Compared with simple sliding screening, the screening speed is significantly faster and the screening efficiency is higher after adding the vibration generated by the disc spring 14. Moreover, this vibration does not require an additional motor or eccentric wheel; it is generated naturally by the inertial force and elasticity during the movement.

[0035] In this embodiment, reference Figure 5 and Figure 6As shown, a lead screw 15 is provided inside the first screening frame 11 along its sliding direction. Both ends of the lead screw 15 penetrate the opposite side walls of the first screening frame 11 and are rotatably connected to the first screening frame 11 via rolling bearings. One end of the lead screw 15 extends to the outside of the first screening frame 11 and is provided with a screwing part for manually driving the lead screw 15 to rotate. A threaded hole matching the lead screw 15 is provided on the second screening frame 12. The lead screw 15 passes through the threaded hole and forms a threaded transmission connection with the second screening frame 12. By rotating the lead screw 15, the second screening frame 12 can be driven to slide relative to the first screening frame 11, thereby adjusting the distance between the first screening frame 11 and the second screening frame 12. The degree of misalignment of the screen holes between the frames 12 is considered. Both the first screening frame 11 and the second screening frame 12 are mesh plate structures, wherein the screen hole diameter of the first screening frame 11 is larger than that of the second screening frame 12. When the mounting frame 3 reciprocates, it drives the first screening frame 11 and the second screening frame 12 to move synchronously. At the same time, the elastic vibration generated by the disc spring 14 causes the first screening frame 11 to generate high-frequency micro-amplitude vibration relative to the mounting frame 3, thereby enhancing the screening effect. Both the first screening frame 11 and the second screening frame 12 are mesh plates, but the screen holes on the first screening frame 11 are larger and are used for coarse screening, while the screen holes on the second screening frame 12 are smaller and are used for fine screening. The second screening frame 12 is mounted on the first screening frame 11. Furthermore, they can slide relative to each other. When it is necessary to change the particle size of the final product, the operator manually rotates the screw at the end of the lead screw 15. The lead screw 15 rotates in place under the support of the rolling bearing. Since the lead screw 15 passes through the threaded hole on the second screen frame 12 and is threadedly engaged with it, the rotational motion of the lead screw 15 is converted into the linear sliding of the second screen frame 12 along the axial direction of the lead screw 15. After the second screen frame 12 moves, the relative position between its screen holes and the screen holes of the first screen frame 11 changes. If the screen holes of the two layers are completely aligned, the particles can pass straight up and down through the two screens, and the actual sieve aperture is close to the aperture of the second screen frame 12. If the screen holes of the two layers are misaligned, the particles need to pass at an angle. As the material passes through, the actual sieve aperture becomes smaller. If the misalignment is greater, it can even achieve a filtration effect close to half-hole size. In this way, there is no need to disassemble or replace the screen. The sieving particle size can be continuously adjusted by rotating the screw 15 to adapt to the particle size requirements of different rubber products. During the operation of the equipment, the mounting frame 3 drives the first sieve frame 11 and the second sieve frame 12 to slide back and forth together. At the same time, the vibration generated by the disc spring 14 causes the first sieve frame 11 to vibrate at a high frequency and a small amplitude relative to the mounting frame 3. The second sieve frame 12 moves synchronously with the first sieve frame 11. The two layers of screens maintain a relatively fixed misalignment, which not only achieves graded screening but also ensures that the sieving effect after adjustment is stable and reliable.

[0036] In this embodiment, during operation, waste rubber is fed into the crushing box 16 through the feed inlet 2. Two sets of crushing rollers 5 rotate in opposite directions under the drive of the drive shaft 4, maintaining the same speed through meshing gears 6, thus squeezing and crushing the rubber. Simultaneously, the crank 7 fixed to the drive shaft 4 rotates, and the free end of the crank 7 pulls the connecting rod 8 through the rotating shaft. The connecting rod 8 pushes the mounting frame 3 to reciprocate along the guide rod 9. The springs 10 on both sides of the mounting frame 3 act as buffers and return mechanisms, making the movement smoother. When the mounting frame 3 slides, the first screening frame 11 connected to it through the sliding sleeve 13 and the second screening frame 12 mounted on the first screening frame 11 move synchronously. At the same time, the disc spring 14 sleeved on the sliding sleeve 13 generates elastic vibration during the reciprocating sliding of the mounting frame 3, causing the first... A screening rack 11 forms a high-frequency micro-amplitude vibration relative to the mounting frame 3, which helps the rubber particles on the screen to pass through the screen quickly. Both the first screening rack 11 and the second screening rack 12 are mesh plate structures. The screen aperture of the first screening rack 11 is larger than that of the second screening rack 12. The rubber particles first pass through the coarse screen of the first screening rack 11 and then fall into the fine screen of the second screening rack 12 to achieve graded screening. When it is necessary to change the screening particle size, the second screening rack 12 is driven to slide relative to the first screening rack 11 by turning the screw 15 to adjust the degree of misalignment of the screen apertures between the two, thereby changing the actual screening aperture size. Different particle size requirements can be adapted without replacing the screen. In the whole process, the rotational kinetic energy of the crushing roller 5 is used to drive the screen rack to slide back and forth and vibrate simultaneously, without the need to equip the screening part with an independent motor or vibrator.

[0037] The control method of this invention is automatic control through a controller. The control circuit of the controller can be implemented by simple programming by those skilled in the art. The power supply is also common knowledge in the art. Furthermore, since this invention is mainly used to protect mechanical devices, the control method and circuit connection will not be explained in detail here.

[0038] It should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste rubber recycling device, comprising a frame (11), characterized in that: The frame (11) is provided with a crushing box (16), and a feed inlet (2) is provided above the crushing box (16). Two sets of symmetrically distributed crushing rollers (5) are rotatably arranged inside the crushing box (16) for crushing waste rubber. A mounting frame (3) located below the crushing box (16) is slidably installed on the frame (11). A connecting rod (8) is rotatably mounted on the mounting frame (3). A crank (7) is fixed on the drive shaft (4) of the crushing roller (5). The free end of the crank (7) is rotatably connected to the connecting rod (8) to convert the rotational motion of the drive shaft (4) into the reciprocating sliding motion of the mounting frame (3). A first screening frame (11) is slidably arranged inside the mounting frame (3). A second screening frame (12) is slidably arranged on the first screening frame (11) to classify and screen the crushed rubber particles.

2. The waste rubber recycling device according to claim 1, characterized in that: Both sets of crushing rollers (5) are rotatably connected to the crushing box (16) through their respective drive shafts (4). Both sets of drive shafts (4) are fixedly fitted with meshing gears (6). The two sets of gears (6) have the same number of teeth and are used to make the two sets of crushing rollers (5) rotate in opposite directions at the same speed, thereby forming a uniform extrusion and shearing force on the waste rubber entering between the two crushing rollers (5).

3. The waste rubber recycling device according to claim 1, characterized in that: At least one horizontally arranged guide rod (9) is fixedly installed inside the frame (11). The mounting frame (3) has a guide hole that matches the guide rod (9). The mounting frame (3) is slidably connected to the guide rod (9) through the guide hole. The guide rod (9) is used to constrain the reciprocating sliding trajectory of the mounting frame (3) in the horizontal direction and prevent the mounting frame (3) from deviating or shaking during the movement.

4. The waste rubber recycling device according to claim 3, characterized in that: Two sets of symmetrically distributed springs (10) are sleeved on the guide rod (9). The two sets of springs (10) are located on opposite sides of the mounting frame (3). One end of each set of springs (10) is fixedly connected to the mounting frame (3), and the other end is fixedly connected to the end of the guide rod (9). The two sets of springs (10) are used to provide rebound force and buffer force respectively during the reciprocating sliding process of the mounting frame (3), so that the movement of the mounting frame (3) is more stable.

5. The waste rubber recycling device according to claim 1, characterized in that: A sliding sleeve (13) is installed between the first screening frame (11) and the mounting frame (3). The sliding sleeve (13) includes an inner tube and an outer tube that are nested together. One end of the inner tube is fixedly connected to the first screening frame (11), and one end of the outer tube is fixedly connected to the mounting frame (3). The sliding sleeve (13) is used to guide the sliding direction of the first screening frame (11) relative to the mounting frame (3) and limit its sliding stroke.

6. The waste rubber recycling device according to claim 5, characterized in that: A disc spring (14) is fitted onto the sliding sleeve (13). One end of the disc spring (14) is fixedly connected to the inner tube end of the sliding sleeve (13), and the other end of the disc spring (14) is fixedly connected to the outer tube end of the sliding sleeve (13). The disc spring (14) is used to generate elastic vibration on the first screening frame (11) when the mounting frame (3) slides back and forth, to assist the rubber particles on the screening frame to pass through the screen quickly.

7. The waste rubber recycling device according to claim 1, characterized in that: A lead screw (15) is provided inside the first screening frame (11) along its sliding direction. The two ends of the lead screw (15) pass through the opposite side walls of the first screening frame (11) respectively, and are rotatably connected to the first screening frame (11) through rolling bearings. One end of the lead screw (15) extends to the outside of the first screening frame (11) and is provided with a screwing part for manually driving the lead screw (15) to rotate.

8. The waste rubber recycling device according to claim 7, characterized in that: The second screen frame (12) has a threaded hole that matches the lead screw (15). The lead screw (15) passes through the threaded hole and forms a threaded transmission connection with the second screen frame (12). By rotating the lead screw (15), the second screen frame (12) can be driven to slide relative to the first screen frame (11), thereby adjusting the degree of misalignment of the screen holes between the first screen frame (11) and the second screen frame (12).

9. The waste rubber recycling device according to claim 1, characterized in that: The crank (7) has a rod-shaped structure. One end of the crank (7) is fixedly sleeved on the drive shaft (4) and rotates synchronously with the drive shaft (4). The free end of the crank (7) is rotatably connected to one end of the connecting rod (8) through a rotating shaft. The other end of the connecting rod (8) is rotatably mounted on the mounting frame (3). The drive shaft (4), crank (7), connecting rod (8) and mounting frame (3) together constitute the connecting rod (8) rocker mechanism, which is used to convert the continuous rotational motion of the drive shaft (4) into the reciprocating linear motion of the mounting frame (3).

10. A waste rubber recycling device according to claim 1, characterized in that: The first screening frame (11) and the second screening frame (12) are both mesh plate structures. The screen hole diameter of the first screening frame (11) is larger than that of the second screening frame (12). When the mounting frame (3) slides back and forth, it drives the first screening frame (11) and the second screening frame (12) to move synchronously. At the same time, the elastic vibration generated by the disc spring (14) causes the first screening frame (11) to generate high-frequency micro-amplitude vibration relative to the mounting frame (3) to enhance the screening effect.

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