Offset-resistant packaging material conveyor belt arrangement
By using an infrared sensor to automatically adjust the limit rollers and combining them with an anti-deviation packaging material conveyor belt device with automatic cleaning and shock absorption components, the problem of downtime caused by manual adjustment of the limit rollers is solved, and efficient and stable material conveying is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHONGQING KUNHONG PACKAGING CO LTD
- Filing Date
- 2025-10-10
- Publication Date
- 2026-06-09
AI Technical Summary
The limit rollers of existing anti-deviation packaging material conveyor belt devices rely heavily on manual adjustment, which requires machine stoppage when changing specifications in mass production. Inaccurate adjustment can easily cause malfunctions, affecting the stability of the conveyor belt and resulting in long downtime.
Infrared sensors are used to detect the height and width of the packaging box in real time. The controller automatically adjusts the position and height of the limit wheels. Combined with automatic cleaning and shock absorption components, it achieves precise adjustment and stable conveying without manual intervention.
It reduces errors from manual adjustments, enhances the equipment's ability to adapt to diverse production processes, reduces labor intensity and downtime, ensures the stability and cleanliness of transmission, and improves the equipment's adaptability and reliability.
Smart Images
Figure CN224336470U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of material conveying technology, specifically to a packaging material conveyor belt device for preventing deviation. Background Technology
[0002] In modern industrial production systems, anti-deviation packaging material conveyor belt devices play an indispensable role as key equipment to ensure stable material transportation. Through precise mechanical design and control logic, these devices can effectively prevent abnormal situations such as material deviation and slippage during transportation, ensuring the smooth operation of the production process.
[0003] In existing technologies, during actual use, the limiting rollers of most anti-deviation packaging material conveyor belt devices still rely heavily on manual operation. In the face of mass production, whenever production needs change and the height of the limiting rollers needs to be adjusted to accommodate different specifications of materials, the machine needs to be stopped for adjustment. If the operation is not done properly, the height of the limiting rollers may be inaccurate, which will affect the stability of material conveying and even cause equipment failure. Moreover, the manual adjustment method often results in long downtime, which undoubtedly has a serious impact on the production schedule. Utility Model Content
[0004] The purpose of this invention is to provide a packaging material conveyor belt device to prevent deviation, thereby solving the problems mentioned in the background art, such as the existing anti-deviation conveyor belt limit roller height relying on manual adjustment, requiring machine stoppage for changing specifications in mass production, being prone to affecting transmission stability and causing malfunctions due to inaccurate adjustment, and long downtime seriously delaying production progress.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an anti-deviation packaging material conveyor belt device, comprising a device body, a support base slidably connected to the device body, a shock-absorbing component disposed between the device body and the support base, a conveying component disposed on the device body, a fixed housing fixedly mounted on the device body, a first infrared sensor body mounted on the device body, a second infrared sensor body mounted on the device body, a cleaning component disposed on the fixed housing, a controller body mounted on the fixed housing, a first fixed bracket fixedly mounted on the device body, a first push rod body fixedly mounted on the first fixed bracket, and a component slidably connected to the first fixed bracket. The device includes a sliding rod, a first connecting bracket fixedly connected to the sliding rod, a first limiting wheel assembly fixedly installed on the first connecting bracket, a first motor fixedly installed on the main body of the device, a first threaded rod fixedly connected to the output end of the first motor, and a second limiting wheel assembly threadedly connected to the first threaded rod. The second limiting wheel assembly is slidably connected to the first connecting bracket. The first infrared sensor body is used to sense the height position of the packaging box, the second infrared sensor body is used to sense the width of the packaging box, the controller body is used to control the operation of the first motor and the first push rod body, the first push rod body is used to adjust the position of the first connecting bracket, the first motor is used to drive the first threaded rod to rotate, and the conveying assembly is used to convey the packaging box forward.
[0006] In a preferred embodiment of this technical solution, the first fixed bracket has a limiting groove at the relative position of the sliding rod, and the sliding rod is slidably connected to the groove.
[0007] According to the preferred embodiment of this technical solution, the cleaning assembly includes a second motor fixedly mounted on a fixed housing, a second threaded rod fixedly connected to the output end of the second motor, a sliding seat threadedly connected to the second threaded rod, a mounting bracket fixedly mounted on the sliding seat, a cleaning roller body rotatably connected to the mounting bracket, a first gear fixedly connected to one end of the cleaning roller body, and a fixed rack fixedly mounted on the fixed housing. The first gear meshes with the fixed rack, the sliding seat is slidably connected to the fixed housing, the second motor drives the second threaded rod to rotate, and when the mounting bracket moves, it drives the cleaning roller body to rotate through the engagement of the first gear and the fixed rack.
[0008] In a preferred embodiment of this technical solution, the fixed housing has a guide groove at the relative position of the sliding seat, and the sliding seat is slidably connected to the groove.
[0009] In the preferred embodiment of this technical solution, the mounting bracket has a limiting groove at the relative position of the cleaning roller body, and the cleaning roller body is rotatably connected to the groove.
[0010] Based on the preferred embodiment of this technical solution, the shock absorption component includes a first fixed seat fixedly installed on the main body of the device, a second fixed seat fixedly installed on the support base, a second connecting bracket disposed between the first fixed seat and the second fixed seat, a damper body disposed between the first fixed seat and the second fixed seat, a shock absorption spring disposed between the first fixed seat and the second fixed seat, a first sliding block slidably connected to the second connecting bracket, a second connecting rod rotatably connected between the first sliding block and the first fixed seat, and a first connecting rod rotatably connected between the first sliding block and the second fixed seat.
[0011] In a preferred embodiment of this technical solution, the second connecting bracket has a limiting groove at the relative position of the first sliding block, and the first sliding block is slidably connected to the groove.
[0012] According to the preferred embodiment of this technical solution, the conveying assembly includes a third motor fixedly installed on the main body of the device, a first conveying roller fixedly connected to the output end of the third motor, a conveyor belt drivenly connected to the first conveying roller, and a support roller body rotatably connected to the main body of the device.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. By using the first and second infrared sensor bodies to detect the height and width of the packaging box in real time, the device can accurately capture the shape characteristics of packaging boxes of different specifications and transmit the data synchronously to the controller body. The controller body automatically triggers the working instructions of the first push rod body and the first motor based on the detection data, eliminating the need for manual adjustment. This reduces the operation process of repeatedly adjusting the equipment according to the packaging specifications, lowers labor costs and adjustment errors, and significantly improves the adaptability of the equipment to diverse production scenarios.
[0015] 2. By activating the cleaning assembly, the cleaning work is completed automatically, reducing the labor intensity of the staff. At the same time, the cleaning assembly drives the cleaning roller body to rotate through the meshing transmission of the first gear and the fixed rack, realizing the dual cleaning effect of "mobile cleaning + self-rotation cleaning", improving the cleaning accuracy and the detection accuracy of the first infrared sensor body and the second infrared sensor body.
[0016] 3. By setting up shock-absorbing components, the main body of the device and the conveyor belt are kept running smoothly by absorbing and attenuating vibrations. This ensures that the surface of the conveyor belt remains flat and prevents the packaging box from tilting due to the undulation of the conveyor belt. At the same time, the stable operating environment of the equipment reduces the interference of vibration on the first limit wheel group, the second limit wheel group and other limiting structures, so that the wheel group can continuously provide stable limiting for the packaging box and further prevent the packaging box from shifting. Attached Figure Description
[0017] Figure 1This is a schematic diagram of one embodiment of the anti-deviation packaging material conveyor belt device of this utility model;
[0018] Figure 2 for Figure 1 Schematic diagram of the fixed outer shell and its connected components;
[0019] Figure 3 for Figure 1 Schematic diagram of the structure of the second motor and its connected components;
[0020] Figure 4 for Figure 1 Schematic diagram of the first fixed bracket and its connected components;
[0021] Figure 5 This is a schematic diagram of the shock absorption component structure of this utility model;
[0022] Figure 6 This is a schematic diagram of the conveying component structure of this utility model.
[0023] In the diagram: 1. Main body of the device; 4. Support base; 21. Fixed outer shell; 22. First infrared sensor body; 23. Second infrared sensor body; 24. Controller body; 25. First fixed bracket; 26. First push rod body; 27. Sliding rod; 28. First connecting bracket; 29. First limit wheel assembly; 210. First motor; 211. First threaded rod; 212. Second limit wheel assembly; 213. Second motor; 214. Second threaded rod; 215. Sliding seat; 216. Mounting bracket; 217. Cleaning roller body; 218. First gear; 219. Fixed rack; 31. First fixed seat; 32. Second fixed seat; 33. Second connecting bracket; 34. Damper body; 35. Shock-absorbing spring; 36. First sliding block; 37. First connecting rod; 38. Second connecting rod; 39. Third motor; 310. First conveying roller; 311. Conveyor belt; 312. Support roller body. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1 - Figure 6This utility model provides an embodiment of an anti-deviation packaging material conveyor belt device, including a device body 1, a support base 4 slidably connected to the device body 1, a shock-absorbing component disposed between the device body 1 and the support base 4, a conveying component disposed on the device body 1, a fixed housing 21 fixedly mounted on the device body 1, a first infrared sensor body 22 mounted on the device body 1, a second infrared sensor body 23 mounted on the device body 1, a cleaning component disposed on the fixed housing 21, a controller body 24 mounted on the fixed housing 21, a first fixed bracket 25 fixedly mounted on the device body 1, a first push rod body 26 fixedly mounted on the first fixed bracket 25, a sliding rod 27 slidably connected to the first fixed bracket 25, a first connecting bracket 28 fixedly connected to the sliding rod 27, a first limiting wheel group 29 fixedly mounted on the first connecting bracket 28, and a component fixedly mounted on the device body 1. The device includes a first motor 210, a first threaded rod 211 fixedly connected to the output end of the first motor 210, a second limiting wheel set 212 threadedly connected to the first threaded rod 211, the second limiting wheel set 212 slidably connected to the first connecting bracket 28, a first infrared sensor body 22 for sensing the height position of the packaging box, a second infrared sensor body 23 for sensing the width of the packaging box, a controller body 24 for controlling the operation of the first motor 210 and the first push rod body 26, the first push rod body 26 for adjusting the position of the first connecting bracket 28, the first motor 210 for driving the first threaded rod 211 to rotate, and a conveying assembly for conveying the packaging box forward. When the device is started, the conveying assembly provides a stable conveying foundation for the packaging box and guides the packaging box forward along the preset path of the conveyor belt 311. During the conveying process of the packaging box, the first infrared sensor body 22 and the second infrared sensor body 23 monitor the size information of the packaging box in real time. The first infrared sensor body 22 senses the height of the packaging box, and the second infrared sensor body 23 senses the width of the packaging box. The sensed data is transmitted to the controller body 24. The controller body 24 controls the first push rod body 26 and the first motor 210 to work according to the received size data. The first push rod body 26 adjusts the movement of the first connecting bracket 28 and the sliding rod 27 through telescopic movement, thereby adjusting the width position of the first limit wheel group 29 and the second limit wheel group 212. Then, the first motor 210 drives the first threaded rod 211 to rotate, so that the second limit wheel group 212, which is threadedly connected to the threaded rod, slides along the first connecting bracket 28 to adjust the height position of the second limit wheel group 212. This completes the adjustment. When impurities are attached to the detection ends of the first infrared sensor body 22 and the second infrared sensor body 23 and need to be cleaned, the cleaning component is activated to clean the first infrared sensor body 22 and the second infrared sensor body 23. In addition, the vibration generated during the operation of the device is buffered and dissipated by the shock absorption component.
[0026] Please seeFigure 1 - Figure 4 A further solution based on this embodiment is as follows: the first fixed bracket 25 has a limiting groove at the relative position of the sliding rod 27, and the sliding rod 27 is slidably connected to the groove. The groove provides a clear movement trajectory for the sliding rod 27, restricts the lateral displacement of the sliding rod 27 during the adjustment process, ensures that the sliding rod 27 can move stably along the preset direction, thereby ensuring the adjustment accuracy of the first connecting bracket 28 and the first limiting wheel group 29, reducing the limiting error caused by the shaking of the sliding rod 27, and enhancing the stability of the device structure.
[0027] Please see Figure 1 - Figure 3 A further embodiment of this solution is as follows: the cleaning assembly includes a second motor 213 fixedly mounted on the fixed housing 21, a second threaded rod 214 fixedly connected to the output end of the second motor 213, a sliding seat 215 threadedly connected to the second threaded rod 214, a mounting bracket 216 fixedly mounted on the sliding seat 215, a cleaning roller body 217 rotatably connected to the mounting bracket 216, a first gear 218 fixedly connected to one end of the cleaning roller body 217, and a fixed rack 219 fixedly mounted on the fixed housing 21. The first gear 218 meshes with the fixed rack 219, and the sliding seat 215 is slidably connected to the fixed housing 21. The second motor 213 is used to drive the second threaded rod 214 to rotate. When the mounting bracket 216 moves, it drives the cleaning roller body 217 to rotate through the cooperation of the first gear 218 and the fixed rack 219. The cleaning assembly uses a motor-driven threaded rod to move the sliding seat 215. At the same time, the meshing of gears and racks enables the cleaning roller to rotate, allowing the cleaning roller to rotate at high speed during lateral movement. This not only thoroughly cleans the dust and debris on the conveyor belt 311, but also enhances the cleaning force and improves the cleaning effect through rotation. The sliding connection between the sliding seat 215 and the fixed housing 21 ensures the stability of the cleaning trajectory, avoids cleaning dead corners, ensures the cleanliness of the surface of the conveyor belt 311, and reduces the interference of impurities on the conveying of packaging boxes.
[0028] Please see Figure 1 - Figure 3 A further solution based on this embodiment is as follows: the fixed housing 21 has a guide groove at a relative position to the sliding seat 215, and the sliding seat 215 is slidably connected to the groove. The guide groove provides precise guidance for the movement of the sliding seat 215, preventing the sliding seat 215 from rotating or deviating under the drive of the second threaded rod 214, ensuring that the sliding seat 215 can move smoothly along a fixed direction, thereby ensuring that the cleaning path of the cleaning roller body 217 is uniform and consistent, avoiding the problem of incomplete cleaning in some areas due to the shaking of the sliding seat 215, and improving the working reliability of the cleaning assembly.
[0029] Please see Figure 1 -Figure 3 A further solution based on this embodiment is as follows: the mounting bracket 216 has a limiting groove at a relative position to the cleaning roller body 217, and the cleaning roller body 217 is rotatably connected to the groove. The groove design provides stable rotational support for the cleaning roller body 217, restricting the axial displacement and radial sway of the cleaning roller body 217 during rotation, ensuring that the cleaning roller can rotate smoothly around the fixed axis, reducing frictional noise and component wear caused by unstable installation, extending the service life of the cleaning roller, and ensuring the uniformity of cleaning force.
[0030] Please see Figure 1 - Figure 5 A further embodiment of this solution includes: a shock-absorbing assembly comprising a first fixed seat 31 fixedly mounted on the main body 1, a second fixed seat 32 fixedly mounted on the support base 4, a second connecting bracket 33 disposed between the first fixed seat 31 and the second fixed seat 32, a damper body 34 disposed between the first fixed seat 31 and the second fixed seat 32, a shock-absorbing spring 35 disposed between the first fixed seat 31 and the second fixed seat 32, a first sliding block 36 slidably connected to the second connecting bracket 33, a second connecting rod 38 rotatably connected between the first sliding block 36 and the first fixed seat 31, and a first connecting rod 37 rotatably connected between the first sliding block 36 and the second fixed seat 32. The shock-absorbing assembly effectively absorbs the vibration impact generated during the operation of the device through the elastic buffering of the spring and the energy dissipation effect of the damper; the cooperation of the connecting rod and the sliding block allows the vibration force to be evenly distributed to each component, avoiding structural damage caused by excessive local stress, while improving the overall stability of the device, reducing the impact of vibration on the conveying accuracy of the packaging box, and protecting the internal components of the equipment.
[0031] Please see Figure 1 - Figure 5 A further solution based on this embodiment is as follows: the second connecting bracket 33 has a limiting groove at the relative position of the first sliding block 36, and the first sliding block 36 is slidably connected to the groove. The groove plays a limiting and guiding role in the movement of the first sliding block 36, ensuring that the sliding block can only slide along the preset direction of the second connecting bracket 33, so that the rotation angle of the first connecting rod 37 and the second connecting rod 38 is kept within a reasonable range, ensuring the stability of the force transmission path of the shock absorption component, avoiding the reduction of shock absorption effect or component jamming caused by the displacement of the sliding block, and enhancing the reliability of the shock absorption structure.
[0032] Please see Figure 1 - Figure 6A further embodiment of this solution is as follows: the conveying assembly includes a third motor 39 fixedly mounted on the main body 1 of the device, a first conveying roller 310 fixedly connected to the output end of the third motor 39, a conveyor belt 311 driven by the first conveying roller 310, and a support roller body 312 rotatably connected to the main body 1 of the device. The conveying assembly drives the conveyor roller to rotate the conveyor belt 311, providing stable conveying power for the packaging box; the support roller body 312 provides uniform support for the conveyor belt 311, preventing the conveyor belt 311 from sagging due to the load, ensuring the surface of the conveyor belt 311 is flat, reducing the bumps and tilts of the packaging box during the conveying process, and further improving the stability and anti-deviation effect of the conveying with the limiting structure, ensuring that the packaging box can be accurately conveyed according to the preset path.
[0033] Working principle: When the device is started, the third motor 39 drives the first conveyor roller 310 to rotate, which in turn drives the conveyor belt 311 to rotate, providing continuous conveying power for the packaging boxes. The support roller body 312 provides uniform support for the conveyor belt 311, preventing the conveyor belt 311 from sagging due to the load and ensuring that the surface of the conveyor belt 311 is flat, providing a stable conveying foundation for the packaging boxes and guiding them to move along the preset path of the conveyor belt 311. During the conveying process of the packaging boxes, the first infrared sensor body 22 and the second infrared sensor body 23 monitor the size information of the packaging boxes in real time. The height of the packaging box is sensed, and the width of the packaging box is sensed by the second infrared sensor body 23. The sensed data is transmitted to the controller body 24. Based on the received size data, the controller body 24 controls the operation of the first push rod body 26 and the first motor 210. The first push rod body 26 adjusts the movement of the first connecting bracket 28 and the sliding rod 27 through telescopic movement, thereby adjusting the width position of the first limit wheel set 29 and the second limit wheel set 212. Then, the first motor 210 drives the first threaded rod 211 to rotate, causing the second limit wheel set 212, which is threaded onto the threaded rod, to slide along the first connecting bracket 28. Adjust the height of the second limit wheel set 212 to complete the adjustment. When impurities are attached to the detection ends of the first infrared sensor body 22 and the second infrared sensor body 23 and need to be cleaned, the second motor 213 is started to drive the second threaded rod 214 to rotate, causing the sliding seat 215 threaded on the threaded rod to move laterally along the guide groove of the fixed housing 21. When the sliding seat 215 moves, the mounting bracket 216 moves synchronously with it. At this time, the first gear 218 at one end of the cleaning roller body 217 meshes with the fixed rack 219 on the fixed housing 21, driving the cleaning roller body 217 during the movement. The self-rotating cleaning roller body 217 rotates while moving, thoroughly cleaning the dust and debris on the surfaces of the first infrared sensor body 22 and the second infrared sensor body 23. In addition, when the device is subjected to vibration and impact, the shock-absorbing spring 35 between the first fixed seat 31 and the second fixed seat 32 absorbs part of the vibration energy through elastic deformation, while the damper body 34 attenuates the vibration amplitude through energy dissipation. At the same time, the first connecting rod 37 and the second connecting rod 38 push the first sliding block 36 to slide along the slide groove of the second connecting bracket 33, dispersing the vibration force, avoiding local stress concentration, and improving the overall operational stability.
[0034] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An anti-deviation packaging material conveyor belt device, comprising a device body (1), characterized in that: It also includes a support base (4) slidably connected to the device body (1), a shock-absorbing component disposed between the device body (1) and the support base (4), a conveying component disposed on the device body (1), a fixed housing (21) fixedly mounted on the device body (1), a first infrared sensor body (22) mounted on the device body (1), a second infrared sensor body (23) mounted on the device body (1), a cleaning component disposed on the fixed housing (21), a controller body (24) mounted on the fixed housing (21), a first fixed bracket (25) fixedly mounted on the device body (1), a first push rod body (26) fixedly mounted on the first fixed bracket (25), a sliding rod (27) slidably connected to the first fixed bracket (25), a first connecting bracket (28) fixedly connected to the sliding rod (27), and a fixed mounting bracket. The first limiting wheel assembly (29) is mounted on the first connecting bracket (28), the first motor (210) is fixedly mounted on the main body (1) of the device, the first threaded rod (211) is fixedly connected to the output end of the first motor (210), and the second limiting wheel assembly (212) is threadedly connected to the first threaded rod (211). The second limiting wheel assembly (212) is slidably connected to the first connecting bracket (28). The first infrared sensor body (22) is used to sense the height position of the packaging box, the second infrared sensor body (23) is used to sense the width of the packaging box, the controller body (24) is used to control the first motor (210) and the first push rod body (26) to work, the first push rod body (26) is used to adjust the position of the first connecting bracket (28), the first motor (210) is used to drive the first threaded rod (211) to rotate, and the conveying assembly is used to convey the packaging box forward.
2. The anti-deviation packaging material conveyor belt device according to claim 1, characterized in that: The first fixed bracket (25) has a limiting groove at the relative position of the sliding rod (27), and the sliding rod (27) is slidably connected to the groove.
3. The anti-deviation packaging material conveyor belt device according to claim 1, characterized in that: The cleaning assembly includes a second motor (213) fixedly mounted on a fixed housing (21), a second threaded rod (214) fixedly connected to the output end of the second motor (213), a sliding seat (215) threadedly connected to the second threaded rod (214), a mounting bracket (216) fixedly mounted on the sliding seat (215), a cleaning roller body (217) rotatably connected to the mounting bracket (216), a first gear (218) fixedly connected to one end of the cleaning roller body (217), and a fixed rack (219) fixedly mounted on the fixed housing (21). The first gear (218) meshes with the fixed rack (219), and the sliding seat (215) is slidably connected to the fixed housing (21). The second motor (213) is used to drive the second threaded rod (214) to rotate. When the mounting bracket (216) moves, it drives the cleaning roller body (217) to rotate through the engagement of the first gear (218) and the fixed rack (219).
4. The anti-deviation packaging material conveyor belt device according to claim 3, characterized in that: The fixed housing (21) has a guide groove at the relative position of the sliding seat (215), and the sliding seat (215) is slidably connected to the groove.
5. The anti-deviation packaging material conveyor belt device according to claim 3, characterized in that: The mounting bracket (216) has a limiting groove at the relative position of the cleaning roller body (217), and the cleaning roller body (217) is rotatably connected to the groove.
6. The anti-deviation packaging material conveyor belt device according to claim 1, characterized in that: The damping assembly includes a first fixed seat (31) fixedly installed on the main body (1), a second fixed seat (32) fixedly installed on the support base (4), a second connecting bracket (33) disposed between the first fixed seat (31) and the second fixed seat (32), a damper body (34) disposed between the first fixed seat (31) and the second fixed seat (32), a damping spring (35) disposed between the first fixed seat (31) and the second fixed seat (32), a first sliding block (36) slidably connected to the second connecting bracket (33), a second connecting rod (38) rotatably connected between the first sliding block (36) and the first fixed seat (31), and a first connecting rod (37) rotatably connected between the first sliding block (36) and the second fixed seat (32).
7. The anti-deviation packaging material conveyor belt device according to claim 6, characterized in that: The second connecting bracket (33) has a limiting groove at the relative position of the first sliding block (36), and the first sliding block (36) is slidably connected to the groove.
8. The anti-deviation packaging material conveyor belt device according to claim 6, characterized in that: The conveying assembly includes a third motor (39) fixedly mounted on the main body (1), a first conveying roller (310) fixedly connected to the output end of the third motor (39), a conveyor belt (311) drivenly connected to the first conveying roller (310), and a support roller body (312) rotatably connected to the main body (1).