A windbox-based conveyor system

Abstract

The application discloses a wind box-based conveying belt system, which comprises a rack, a first conveying belt, a second conveying belt, a conveying driving mechanism, a wind box, an arc plate and an arc clamping conveying mechanism. The first and second conveying belts are both provided with linear conveying sections and are arranged perpendicularly in a horizontal plane; the rack is provided with the wind box corresponding to each linear conveying section; the suction force generated by the wind box enables the through holes on the belts to adsorb paper cards. The rack is provided with the arc plate, the two ends of the arc plate are connected to the two linear conveying sections respectively, the arc clamping conveying mechanism is arranged below the arc plate and is used for clamping the paper cards in the arc section, so that the paper cards with high gram weight are conveyed while adhering to the arc plate. The wind box adsorption is adopted in the linear section and the mechanical clamping is adopted in the arc section, so that the volume and cost of the wind box system are reduced, the deviation or falling of the paper cards with high gram weight during the connection between the turning section and the conveying section is effectively prevented, and the stability and automation efficiency of the conveying are improved.

Description

Technical Field

[0001] This application relates to the technical field of cardboard box bundling, and more specifically, to a bellows-based conveyor belt system. Background Technology

[0002] In the field of cardboard box strapping technology, existing strapping machines typically require the placement of paper cards as edge-protecting materials at the strapping point to ensure secure strapping and prevent damage to the cardboard box edges, thus isolating the PP strapping tape from direct contact with the cardboard box. Traditionally, these paper cards are placed manually, which is inefficient and inaccurate, hindering automated production. To address this, existing technologies integrate automatic paper card conveying systems, such as the paper card bending device and automatic corner protection mechanism for cardboard box strapping disclosed in patent number CN202320405375.0. This mechanism uses an adsorption belt conveyor to transport the paper cards, including a vacuum chamber, a conveyor belt with adsorption holes, an adsorption fan, and a servo motor. The adsorption fan generates vacuum adsorption force to fix the paper cards onto the conveyor belt, and the servo motor drives the conveyor belt to achieve stable transport of the paper cards.

[0003] However, to accommodate loading obstructions, the layout of the adsorption conveyor belt system requires a first straight conveyor section aligned with the carton conveying direction, a second straight conveyor section for obstruction-avoiding loading, and an arc-shaped conveyor section connecting the two. These sections all consist of a perforated conveyor belt and a bellows, resulting in a large bellows volume and high cost. Especially in the arc-shaped conveyor section and the various conveyor junctions, when handling high-grammage paper cards, insufficient adsorption force makes it difficult for the paper cards to bend and adhere to the conveyor belt, easily leading to misalignment or even falling off, causing equipment malfunctions and production interruptions. Therefore, there is a need in the art for an improved conveyor belt system to solve the problems of high bellows cost and unstable conveying in the arc-shaped section. Utility Model Content

[0004] To address the issues of high cost and unstable conveying in circular arc sections in existing paper card conveying systems, this application provides a bellows-based conveyor belt system.

[0005] A bellows-based conveyor belt system includes a frame, on which a first conveyor belt and a second conveyor belt with through holes are mounted, and a conveying drive mechanism is provided for driving the first and second conveyor belts to convey materials. Both the first and second conveyor belts have straight conveying sections, and the two straight conveying sections are arranged perpendicularly in a horizontal plane. A bellows for generating suction force is provided at both the first and second conveyor belts on the frame, and the straight conveying sections of the first and second conveyor belts are respectively attached to their corresponding bellows, enabling the straight conveying sections to adsorb paper cards. An arc plate is provided on the frame, with its two ends respectively connecting to the two straight conveying sections. An arc clamping conveying mechanism is provided below the arc plate on the frame for clamping the paper cards and conveying them in contact with the arc plate.

[0006] By adopting the above technical solution, the straight conveyor section of the first conveyor belt achieves full-process adsorption, facilitating matching with the movement path of the cardboard and enabling synchronous movement and conveying. This allows for precise attachment of the paper cards to their fixed positions on the cardboard. The straight conveyor section of the second conveyor belt avoids misalignment during paper card loading. The bellows only adsorbs paper cards in the straight section, avoiding the use of bellows in the curved section, thus reducing the volume and number of bellows and lowering system costs. The curved section employs a clamping conveyor mechanism that actively clamps the paper cards, bending them to conform to the curved plate. This solves the problem of paper card misalignment or falling due to insufficient adsorption force in the curved section, improving conveying stability and reliability. The overall system layout is compact, adapting to the transition of paper cards from straight lines to curved sections, and improving automation efficiency.

[0007] Preferably, the frame is provided with an arc-shaped groove extending along the arc surface of the arc plate above the arc plate, the arc-shaped groove opening downwards, and the width of the arc-shaped groove matching the thickness of the paper card.

[0008] Using the above technical solution, the arc-shaped chute acts as a physical guide mechanism, providing lateral restraint as the paper card passes through the arc segment, preventing the paper card from shifting, tilting, or flipping during the bending process. The width-matching design ensures that the paper card will not jam or loosen, further enhancing the stability and accuracy of the arc segment conveying. Working in conjunction with the clamping and conveying mechanism, it forms a double protection, reducing the failure rate.

[0009] Preferably, the frame is provided with a first linear chute extending in a straight line above the straight conveying section of the first conveyor belt, and the frame is provided with a second linear chute extending in a straight line above the straight conveying section of the second conveyor belt. Both the first linear chute and the second linear chute open downwards and are respectively connected to the two ends of the arc chute.

[0010] By adopting the above technical solution, the interconnected design of the straight and circular chutes makes the transition of the paper card from the straight segment to the circular segment smoother and seamless, reducing the impact and jamming risk of the paper card when turning. The continuity of the guide path ensures that the paper card maintains the correct posture throughout the conveying process, improving the consistency and efficiency of system operation. At the same time, this structure simplifies the paper card guiding mechanism and reduces the difficulty of adjustment and maintenance.

[0011] Preferably, the arc clamping conveyor mechanism includes a first clamping conveyor belt, a second clamping conveyor belt, and a clamping transmission drive assembly. The second clamping conveyor belt is located on one side of the first clamping conveyor belt. The first clamping conveyor belt includes a first arc portion extending along the arc surface of the arc plate, a first straight portion corresponding to the straight conveying section of the first conveyor belt, and a second straight portion corresponding to the straight conveying section of the second conveyor belt. The second clamping conveyor belt includes a second arc portion that fits against the first arc portion and a third straight portion that fits against the first straight portion. The first clamping conveyor belt is connected to the clamping transmission drive assembly, and the clamping transmission drive assembly drives the first clamping conveyor belt to drive the second clamping conveyor belt.

[0012] By employing the above technical solution, the clamping conveyor belts provide active clamping force in both the arc and straight sections, ensuring the paper cards adhere tightly to the arc plate. This effectively overcomes the bending resistance caused by the rigidity of the paper cards, preventing them from falling off. The drive assembly only needs to drive the first clamping conveyor belt to power the second clamping conveyor belt, simplifying the transmission structure and saving energy and costs. The clamping conveyor belts cover multiple sections, ensuring uniform force on the paper cards during turning, resulting in more reliable conveying.

[0013] Preferably, the conveying drive mechanism includes a first conveying drive assembly for driving a first conveyor belt drive and a second conveying drive assembly for driving a second conveyor belt drive.

[0014] By adopting the above technical solution, the independent drive component allows the two conveyor belts to operate at different speeds or sequences, adapting to the different conveying needs of paper cards in straight and turning sections, thus improving the system's flexibility and controllability. For example, the belt speed can be adjusted to match the conveying rhythm of the paper cards, reducing accumulation or pulling. Furthermore, independent drive simplifies troubleshooting and maintenance; a failure in one component does not affect the operation of the other.

[0015] Preferably, the first conveying drive assembly includes a first driving pulley, a first driven pulley, a first intermediate pulley, and a first servo motor. The first conveyor belt is sleeved on the first driving pulley and the first driven pulley. The first intermediate pulley is located on one side of the first driving pulley and abuts against the inner side of the first conveyor belt. The portion of the first conveyor belt between the first driven pulley and the first intermediate pulley forms a straight conveying section. The first servo motor is fixed to the frame and connected to the first driving pulley to drive the first driving pulley to rotate.

[0016] The above technical solution utilizes a pressure-absorbing design in the intermediate pulley to ensure the stability and flatness of the linear conveyor section, allowing the belt to fit tightly against the bellows and enhancing the adsorption effect. The servo motor provides precise speed and position control, facilitating synchronous conveying and adjustment, and improving the accuracy and smoothness of paper card delivery. This structure is simple and reliable, reducing the risk of belt slippage or slack.

[0017] Preferably, the second conveying drive assembly includes a second driving pulley, a second driven pulley, a second intermediate pulley, and a second servo motor. The second conveyor belt is sleeved on the second driving pulley and the second driven pulley. The second intermediate pulley is located on one side of the second driving pulley and abuts against the inner side of the second conveyor belt. The portion of the second conveyor belt between the first driven belt and the second intermediate pulley forms a straight conveying section. The second servo motor is fixed to the frame and connected to the second driving pulley for the rotation of the second driving pulley.

[0018] By employing the above technical solution, this structure ensures stable operation and suction force on the straight section of the second conveyor belt. Independent servo motor drive allows for individual control of the second conveyor belt, adapting to vertical conveying requirements. Overall, this improves the system's modularity and maintainability while guaranteeing reliable paper card delivery on the second straight section.

[0019] Preferably, the air box includes a closed box body with side plates arranged in a straight line. The side plates are covered with a plurality of air holes that connect to the interior of the box body. The box body is also provided with an exhaust pipe that connects to its interior. The straight conveying sections of the first conveyor belt and the second conveyor belt are respectively attached to the side plates of the corresponding air box.

[0020] Using the above technical solution, the air box design generates uniform adsorption force through air holes, ensuring that paper cards are firmly adsorbed in straight sections. The enclosed box and exhaust pipe facilitate connection to external fans (such as vacuum pumps), achieving efficient adsorption without complex structures and reducing manufacturing costs.

[0021] Preferably, the clamping transmission drive assembly includes a support bar, a third driving pulley, and a third driven pulley. The support bar is disposed at the bottom of the frame and includes an arcuate strip extending along the arc surface of the arc plate. Each end of the arcuate strip extends a first straight strip aligned with the straight conveying section of the first conveyor belt and a second straight strip aligned with the straight end of the second conveyor belt. The third driving pulley and the third driven pulley are respectively disposed at both ends of the support bar and rotatably connected to the frame. The third driving pulley and the second driven pulley are coaxially connected. The first clamping conveyor belt is sleeved on the third driving pulley and the third driven pulley, and its inner side is attached to the support bar. The first clamping conveyor belt forms a first arcuate portion in the arcuate strip portion, a first straight portion in the first straight strip portion, and a second straight portion in the second straight strip portion.

[0022] By adopting the above technical solution, the support bar provides rigid support for the clamping conveyor belt, ensuring that it maintains the correct shape in both curved and straight sections, and preventing the conveyor belt from deforming or shifting. The coaxial connection of the third driving pulley and the second driven pulley enables synchronization between the clamping conveyor belt and the main conveyor belt, improving the coordination of paper card clamping. This structure optimizes power transmission, reduces energy loss, and enhances system reliability.

[0023] Preferably, the bottom of the support bar is connected to a base plate, and two fourth driven pulleys are rotatably disposed on the base plate, with the second clamping conveyor belt sleeved on the two fourth driven pulleys.

[0024] By adopting the above technical solution, the base plate and driven pulley design ensure stable operation of the second clamping conveyor belt, forming a symmetrical clamping force with the first clamping conveyor belt. This ensures that the paper cards are evenly pressed in the arc section, avoiding misalignment caused by unilateral force. The overall structure is compact, reducing space occupation and facilitating installation and adjustment. The servo motor drive ensures controllable clamping speed, further improving conveying efficiency.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The straight conveyor section of the first conveyor belt achieves full-length adsorption, facilitating matching with the movement path of the cardboard and enabling synchronous movement. This ensures precise placement of the paper cards onto the fixed position on the cardboard. The straight conveyor section of the second conveyor belt avoids misalignment during paper card loading. The bellows only adsorb paper cards in the straight section, avoiding the need for bellows in the curved section, thus reducing the size and number of bellows and lowering system costs. The curved section employs a clamping conveyor mechanism that actively clamps the paper cards, bending them to conform to the curved plate. This solves the problem of paper card misalignment or falling due to insufficient adsorption force in the curved section, improving conveying stability and reliability. The overall system layout is compact, adapting to the transition of paper cards from straight lines to curved sections, enhancing automation efficiency.

[0027] 2. The arc-shaped chute acts as a physical guide mechanism, providing lateral restraint when the paper card passes through the arc section, preventing the paper card from shifting, tilting, or flipping during bending. The connection design between the straight chute and the arc-shaped chute makes the transition of the paper card from the straight section to the arc section smoother and seamless, reducing the impact and jamming risks of the paper card when turning and at the junction of each conveying section.

[0028] 3. Through the cooperation of the clamping conveyor belts, active clamping force is provided in both the arc and straight sections, ensuring that the paper cards fit tightly against the arc plate. This effectively overcomes the high rigidity and bending resistance caused by the high basis weight of the paper cards, preventing them from falling off. Furthermore, the clamping in the straight sections ensures a smooth transition of the paper cards during handover. The drive assembly only needs to drive the first clamping conveyor belt to drive the second clamping conveyor belt, simplifying the transmission structure and saving energy and costs. The clamping conveyor belts cover multiple sections, ensuring uniform force on the paper cards during turning, making the conveying more reliable. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a bellows-based conveyor belt system according to this embodiment.

[0030] Figure 2 This is a schematic diagram of the first angle of a bellows-based conveyor belt system according to this embodiment, after removing the first and second conveyor belts.

[0031] Figure 3 This is a second-angle schematic diagram of a bellows-based conveyor belt system according to this embodiment, after removing the first and second conveyor belts.

[0032] Figure 4 This is a schematic diagram of the arc clamping and conveying mechanism in this embodiment.

[0033] Reference numerals: 1. Frame; 11. Arc-shaped slide rail; 12. First straight slide rail; 13. Second straight slide rail; 2. First conveyor belt; 3. Second conveyor belt; 4. Air box; 41. Side plate; 42. Air hole; 43. Exhaust pipe; 5. First conveyor drive assembly; 51. First driving pulley; 52. First driven pulley; 53. First intermediate pulley; 54. First pressure roller; 55. First servo motor; 6. Second conveyor drive assembly; 61. Second driving pulley; 62. Second driven pulley; 63. Second intermediate pulley; 64. Second pressure roller; 65. Second servo motor; 7. Arc plate; 8. Arc clamping conveyor mechanism; 81. First clamping conveyor belt; 811. First arc section; 812. First straight section; 813. Second straight section; 82. Second clamping conveyor belt; 821. Second arc section; 822. Third straight section; 83. Clamping transmission drive assembly; 831. Support bar; 8311. Arc bar body; 8312. First straight bar body; 8313. Second straight bar body; 832. Third driving pulley; 833. Third driven pulley; 834. First tensioning pulley; 835. Second tensioning pulley; 836. Base plate; 837. Fourth driven pulley; Detailed Implementation

[0034] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0035] Reference Figure 1-3 A conveyor belt system based on a bellows includes a frame 1, on which a first conveyor belt 2, a second conveyor belt 3, and a conveyor drive mechanism are mounted. Both conveyor belts are perforated and driven by the conveyor drive mechanism. Each of the first and second conveyor belts 2 and 3 has a straight conveying section, and these two straight conveying sections are arranged vertically in the horizontal plane, forming an L-shaped path. A bellows 4 is installed at each straight conveying section on the frame 1. The bellows 4 includes a closed box body, with side plates 41 arranged in a straight line on one side of the box body. Multiple air holes 42 are evenly distributed on the side plates 41. The box body is also connected to an exhaust pipe 43 for connecting to an external fan. The straight conveying sections of the first and second conveyor belts 2 and 3 are respectively tightly fitted to the side plates 41 of the corresponding bellows 4. When the fan starts, negative pressure adsorption is generated through the air holes 42, firmly adsorbing the paper cards onto the conveyor belts, achieving stable conveying of the straight sections.

[0036] Reference Figure 1-3The conveying drive mechanism includes a first conveying drive assembly 5 and a second conveying drive assembly 6. The first conveying drive assembly 5 consists of a first driving pulley 51, a first driven pulley 52, a first intermediate pulley 53, a first pressure roller 54, and a first servo motor 55. A first conveyor belt 2 is fitted onto the first driving pulley 51 and the first driven pulley 52. ​​The first intermediate pulley 53 is located on one side of the first driving pulley 51 and presses against the inner side of the first conveyor belt 2, forming a straight conveying section between the first driven pulley 52 and the first intermediate pulley 53. The first pressure roller 54 is rotatably mounted on the frame 1 and located on one side of the first intermediate pulley 53, pressing against the first conveyor belt 2 towards the first intermediate pulley 53 to tighten the first conveyor belt 2 and prevent slippage or slackness. The first servo motor 55 is fixed to the frame 1 and connected to the first driving pulley 51, driving its rotation and thus driving the first conveyor belt 2. Similarly, the second conveying drive assembly 6 consists of a second driving pulley 61, a second driven pulley 62, a second intermediate pulley 63, a second pressure roller 64, and a second servo motor 65. Its structure and working principle are the same as those of the first conveying drive assembly 5, ensuring the stable operation of the straight conveying section of the second conveyor belt 3.

[0037] Reference Figure 1 and Figure 4 An arc plate 7 is also provided on the frame 1, with its two ends respectively connecting to the straight conveyor sections of the first conveyor belt 2 and the second conveyor belt 3, realizing the turning of the paper card from one straight conveyor end to the other. To ensure stable conveying of the paper card on the arc plate 7, an arc clamping conveyor mechanism 8 is installed below the arc plate 7 on the frame 1. This mechanism includes a first clamping conveyor belt 81, a second clamping conveyor belt 82, and a clamping transmission drive assembly 83. The second clamping conveyor belt 82 is located on one side of the first clamping conveyor belt 81, forming a clamping pair. The first clamping conveyor belt 81 includes a first arc portion 811 extending along the arc surface of the arc plate 7, a first straight portion 812 corresponding to the straight conveyor section of the first conveyor belt 2, and a second straight portion 813 corresponding to the straight conveyor section of the second conveyor belt 3. The second clamping conveyor belt 82 includes a second arc portion 821 that fits against the first arc portion 811 and a third straight portion 822 that fits against the first straight portion 812.

[0038] Reference Figure 1 and Figure 4The clamping transmission drive assembly 83 includes a support bar 831, a third driving pulley 832, a third driven pulley 833, and multiple first tensioning pulleys 834 and second tensioning pulleys 835. The support bar 831 is fixed to the bottom of the frame 1 and its shape includes an arcuate bar 8311 extending along the arc surface of the arc plate 7, and a first straight bar 8312 and a second straight bar 8313 respectively aligned with the straight conveying sections of the first and second conveyor belts 3. The third driving pulley 832 and the third driven pulley 833 are respectively disposed at both ends of the support bar 831 and rotatably connected to the frame 1. The third driving pulley 832 is coaxially connected to the second driven pulley 62 to achieve synchronous drive.

[0039] Reference Figure 1 and Figure 4 The first clamping conveyor belt 81 is fitted onto the third driving pulley 832 and the third driven pulley 833, with its inner side abutting the support bar 831, forming a first arc portion 811, a first straight portion 812, and a second straight portion 813. Multiple first tensioning pulleys 834 are rotatably mounted on the bottom of the frame 1 and arranged along the extension direction of the support bar 831 on the side of the support bar 831 away from the second clamping conveyor belt 82. These first tensioning pulleys 834 press against the first clamping conveyor belt 81, tightening it to ensure close contact between the conveyor belt and the support bar 831. A horizontally placed base plate 836 is connected to the bottom of the support bar 831, and the second clamping conveyor belt 82 is supported by the base plate 836. Two fourth driven pulleys 837 are rotatably mounted on the base plate 836, and the second clamping conveyor belt 82 is fitted onto these two fourth driven pulleys 837. The second tensioning wheel 835 is rotatably mounted on the base plate 836, located inside the second clamping conveyor belt 82, and presses the second clamping conveyor belt 82 away from the first clamping conveyor belt 81, thus tightening it and forming a clamping force in conjunction with the first clamping conveyor belt 81. When the clamping transmission drive assembly 83 is working, the first clamping conveyor belt 81 is driven to run, and through friction, it drives the second clamping conveyor belt 82 to drive synchronously, clamping the paper card, bending it and fitting it to the arc plate 7, thus achieving stable conveying of the arc segment.

[0040] Reference Figure 1 Furthermore, the frame 1 has an arc-shaped chute 11 extending along the arc surface of the arc plate 7 above the arc plate 7. The arc-shaped chute 11 opens downwards, and its width matches the thickness of the paper card, providing lateral guidance in the arc segment. Simultaneously, the frame 1 has a first straight chute 12 extending in a straight line above the straight conveying section of the first conveyor belt 2, and a second straight chute 13 extending in a straight line above the straight conveying section of the second conveyor belt 3. Both the first straight chute 12 and the second straight chute 13 open downwards and respectively connect to the two ends of the arc-shaped chute 11, forming a continuous guide path to ensure a smooth and seamless transition of the paper card from the straight section to the arc segment.

[0041] The implementation principle of the bellows-based conveyor belt system disclosed in this application is as follows: During system operation, paper cards are first attracted to the linear conveyor section of the second conveyor belt 3 for feeding, and then driven by the second servo motor 65 to the arc section. In the arc section, the arc clamping conveyor mechanism 8 actively clamps the paper card, bending it to fit the arc plate 7. At the same time, the arc chute 11 and the linear chute provide guidance to prevent misalignment. The paper card is then transferred to the linear conveyor section of the first conveyor belt 2, where it continues to be conveyed by the second servo motor 65. The linear conveyor section of the first conveyor belt 2 achieves full-process attraction, facilitating matching with the movement path of the carton board and ensuring synchronous movement and conveying, thus facilitating precise fitting of the paper card to the fixed position on the carton board. The bellows 4 only provides attraction force in the linear section, while the arc section relies on clamping conveying, thereby reducing the use of the bellows 4, lowering costs, and improving the reliability and efficiency of conveying. The entire system has a compact layout, adapts to the turning and conveying needs of paper cards, and realizes automated production.

[0042] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A bellows-based conveyor belt system, characterized in that: The device includes a frame, on which are mounted a first conveyor belt and a second conveyor belt with through holes, and a conveying drive mechanism for driving the first and second conveyor belts. Both the first and second conveyor belts have straight conveying sections, and the two straight conveying sections are arranged perpendicularly to each other on a horizontal plane. The frame is equipped with air boxes at both the first and second conveyor belts to generate suction force, and the straight conveying sections of the first and second conveyor belts are respectively attached to the corresponding air boxes, so that the straight conveying sections can adsorb paper cards. The frame is equipped with an arc plate, and the two ends of the arc plate are respectively connected to the two straight conveying sections. The frame is equipped with an arc clamping conveying mechanism below the arc plate to clamp the paper cards and make the paper cards adhere to the arc plate for conveying.

2. The conveyor belt system based on a bellows according to claim 1, characterized in that: The frame is provided with an arc-shaped groove extending along the arc surface of the arc plate above the arc plate. The arc-shaped groove opens downward and its width matches the thickness of the paper card.

3. A bellows-based conveyor belt system according to claim 2, characterized in that: The frame is provided with a first linear chute extending in a straight line above the straight conveying section of the first conveyor belt, and the frame is provided with a second linear chute extending in a straight line above the straight conveying section of the second conveyor belt. Both the first linear chute and the second linear chute open downwards and are respectively connected to the two ends of the arc chute.

4. A bellows-based conveyor belt system according to claim 1, characterized in that: The arc-shaped clamping conveyor mechanism includes a first clamping conveyor belt, a second clamping conveyor belt, and a clamping transmission drive assembly. The second clamping conveyor belt is located on one side of the first clamping conveyor belt. The first clamping conveyor belt includes a first arc portion extending along the arc surface of the arc plate, a first straight portion corresponding to the straight conveying section of the first conveyor belt, and a second straight portion corresponding to the straight conveying section of the second conveyor belt. The second clamping conveyor belt includes a second arc portion that fits against the first arc portion and a third straight portion that fits against the first straight portion. The first clamping conveyor belt is connected to the clamping transmission drive assembly, and the clamping transmission drive assembly drives the first clamping conveyor belt to drive the second clamping conveyor belt.

5. A bellows-based conveyor belt system according to claim 4, characterized in that: The conveying drive mechanism includes a first conveying drive assembly for driving a first conveyor belt drive and a second conveying drive assembly for driving a second conveyor belt drive.

6. A bellows-based conveyor belt system according to claim 5, characterized in that: The first conveying drive assembly includes a first driving pulley, a first driven pulley, a first intermediate pulley, and a first servo motor. The first conveyor belt is sleeved on the first driving pulley and the first driven pulley. The first intermediate pulley is located on one side of the first driving pulley and abuts against the inner side of the first conveyor belt. The portion of the first conveyor belt between the first driven pulley and the first intermediate pulley forms a straight conveying section. The first servo motor is fixed to the frame and connected to the first driving pulley to drive the first driving pulley to rotate.

7. A bellows-based conveyor belt system according to claim 6, characterized in that: The second conveying drive assembly includes a second driving pulley, a second driven pulley, a second intermediate pulley, and a second servo motor. The second conveyor belt is sleeved on the second driving pulley and the second driven pulley. The second intermediate pulley is located on one side of the second driving pulley and abuts against the inner side of the second conveyor belt. The portion of the second conveyor belt between the first driven belt and the second intermediate pulley forms a straight conveying section. The second servo motor is fixed to the frame and connected to the second driving pulley for the rotation of the second driving pulley.

8. A bellows-based conveyor belt system according to claim 1, characterized in that: The air box includes a closed box body with side plates arranged in a straight line. The side plates are covered with a number of air holes that connect to the interior of the box body. The box body is also provided with an exhaust pipe that connects to its interior. The straight conveying sections of the first conveyor belt and the second conveyor belt are respectively attached to the side plates of the corresponding air box.

9. A bellows-based conveyor belt system according to claim 7, characterized in that: The clamping transmission drive assembly includes a support bar, a third driving pulley, and a third driven pulley. The support bar is disposed at the bottom of the frame and includes an arcuate strip extending along the arc surface of the arc plate. Each end of the arcuate strip extends a first straight strip aligned with the straight conveying section of the first conveyor belt and a second straight strip aligned with the straight end of the second conveyor belt. The third driving pulley and the third driven pulley are respectively disposed at both ends of the support bar and rotatably connected to the frame. The third driving pulley and the second driven pulley are coaxially connected. The first clamping conveyor belt is sleeved on the third driving pulley and the third driven pulley, and its inner side is attached to the support bar. The first clamping conveyor belt forms a first arcuate portion in the arcuate strip portion, a first straight portion in the first straight strip portion, and a second straight portion in the second straight strip portion.

10. A bellows-based conveyor belt system according to claim 9, characterized in that: The bottom of the support bar is connected to a base plate, and two fourth driven pulleys are rotatably mounted on the base plate. The second clamping conveyor belt is sleeved on the two fourth driven pulleys.

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