A belt conveying device for vacuum cleaning of PCB boards

Abstract

The utility model relates to the technical field of belt conveying equipment discloses a kind of belt conveying equipment for PCB vacuum cleaning, including shell, the bottom side of shell inner wall is fixedly connected with support frame one, the top side of shell inner wall is slidably connected with support frame two, support frame one is located the bottom side of support frame two, the left end of support frame one is connected with support frame two by jacking assembly, the front end of shell is fixedly connected with two fixed plates located on same straight line, the inner wall of two fixed plates is fixedly connected with laser measuring equipment, two support frame three.In the utility model, through laser measuring equipment and hydraulic automatic adjusting mechanism linkage, the PCB board of different thickness can be quickly adapted, without manual replacement component or manual adjustment spacing, greatly improve work efficiency, avoid the damage of plate caused by improper spacing, protect product yield, and PCB board conveying and preliminary cleaning integrated operation can be realized simultaneously.

Description

Technical Field

[0001] This utility model relates to the field of belt conveyor equipment technology, and in particular to a belt conveyor equipment for vacuum cleaning of PCB boards. Background Technology

[0002] As the electronics and information industry develops towards higher precision and larger scale, PCBs (Printed Circuit Boards), as the core carrier components of electronic devices, have been widely used in many fields such as communications, consumer electronics, automotive electronics, and industrial control. In the PCB manufacturing process, surface cleaning and stable transportation are important prerequisites for ensuring the quality of subsequent key processes such as soldering and surface mount technology, and are directly related to the stability and reliability of the end product. Therefore, the industry has placed higher demands on the efficient and precise operation of PCB transportation and cleaning equipment.

[0003] Currently, the industry mainly uses two types of equipment for PCB board conveying and cleaning operations: one is a separate conveying and cleaning system, where PCB boards are transferred from the conveying system to the cleaning system for processing. While this type can achieve basic conveying and cleaning functions separately, the transfer process increases the difficulty of maintaining continuity in the production process, reducing overall operational efficiency and potentially increasing the risk of PCB board damage due to connection deviations during transfer. The other type is an integrated conveying and cleaning system. While this type of equipment reduces transfer steps, most products lack an automatic adjustment mechanism linked to thickness measurement. When dealing with PCB boards of different thicknesses, operators need to manually adjust the spacing of the conveying components. Due to the diverse thicknesses of PCB boards, manual adjustment relies on experience and repeated adjustments, which is not only time-consuming and labor-intensive but also prone to mismatch between the conveying spacing and the PCB board thickness due to adjustment errors, potentially causing board misalignment or edge crushing damage. To address this technical problem, this application proposes a belt conveyor for vacuum cleaning of PCB boards. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a belt conveyor for vacuum cleaning of PCB boards. Through the linkage of laser measuring equipment and hydraulic automatic adjustment mechanism, it can quickly adapt to PCB boards of different thicknesses without the need for manual component replacement or manual spacing adjustment, thus greatly improving work efficiency. At the same time, it avoids damage to the boards caused by improper spacing, ensuring product yield, and can realize integrated operation of PCB board conveying and preliminary cleaning.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A belt conveyor for vacuum cleaning of PCB boards includes:

[0007] The outer shell has a support frame 1 fixedly connected to the bottom side of the inner wall of the outer shell, and a support frame 2 slidably connected to the top side of the inner wall of the outer shell. The support frame 1 is located at the bottom side of the support frame 2. The left end of the support frame 1 is connected to the support frame 2 through a lifting assembly. The front end of the outer shell has two fixed plates located on the same straight line. Laser measuring equipment is fixedly connected to the inner walls of the two fixed plates.

[0008] Two support frames three are provided, with their outer walls fixedly connected to the inner walls of support frame one and support frame two, respectively. The inner walls of the two support frames three are rotatably connected to four rotating rods distributed at the four corners of a parallelogram. In each of the two sets of four rotating rods, one rotating rod is longer than the others. Multiple rollers are fixedly connected to the outer walls of the multiple rotating rods. The four rollers in each set that are in a straight line are connected by a conveyor belt. The inner walls of the two support frames three are fixedly connected to a flow guide hood. The ends of the two flow guide hoods that are close to each other are fixedly connected to a jet nozzle. The ends of the two flow guide hoods that are far apart are connected to a flow guide groove through a pipe.

[0009] The three synchronous pulleys are connected by a synchronous belt. The inner walls of the two front synchronous pulleys are fixedly connected to the outer walls of the two extended rotating rods, and a tension assembly is provided on the right end of the rear synchronous pulley.

[0010] Furthermore, the lifting assembly includes a guide rod 2 located at the left end of support frame 1 and support frame 2. A movable frame 1 is slidably connected to the outer wall of the bottom side of the guide rod 2, and a movable frame 2 is slidably connected to the outer wall of the top side of the guide rod 2. The left end of the movable frame 1 is connected to the movable frame 2 via a connecting rod. One end of the connecting rod is rotatably connected to the left end of the movable frame 1, and the other end of the connecting rod is rotatably connected to the left end of the movable frame 2.

[0011] Furthermore, the tension assembly includes a slider rotatably connected to the right end of the rear synchronous pulley. A slide rod is slidably connected to the inner wall of the slider. The slide rod is fixedly connected to the inner wall of the housing. Two springs are provided on the outer wall of the slide rod. One end of each spring is connected to the slider, and the other end of each spring is connected to the housing.

[0012] Furthermore, a connecting pipe is fixedly connected to the top of the top side of the flow guide shroud, and a connecting pipe is slidably connected to the outer wall of the connecting pipe. The connecting pipe is connected to the top side flow guide groove, and the bottom of the bottom side flow guide shroud is connected to the bottom side flow guide groove through another connecting pipe.

[0013] Furthermore, a hydraulic rod is fixedly connected to the left front end of the outer shell, and the rear end of the hydraulic rod is fixedly connected to the outer wall of the movable frame.

[0014] Furthermore, a motor is mounted on the inner wall of the outer casing via a fixing frame, and the drive end of the motor is connected to a rotating rod on the rear side of the bottom end.

[0015] Furthermore, a guide rod is fixedly connected to the top of the support frame one, and the outer wall of the guide rod one is slidably connected to the inner wall of the support frame two.

[0016] Furthermore, a support plate is fixedly connected to the front end of the outer shell.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, by linking the laser measuring equipment with the hydraulic automatic adjustment mechanism, it can quickly adapt to PCB boards of different thicknesses without the need for manual component replacement or manual spacing adjustment, which greatly improves work efficiency, avoids damage to the board caused by improper spacing, ensures product yield, and enables integrated operation of PCB board conveying and preliminary cleaning.

[0019] 2. In this utility model, when the motor drives the rotating rod to rotate, the two synchronous pulleys on the front side cooperate with the synchronous pulley of the tension assembly on the rear side, and drive all the rotating rods to rotate synchronously through the synchronous belt. The spring adjusts the position of the synchronous pulley in real time to prevent the synchronous belt from loosening or slipping. Combined with the parallelogram-shaped distribution of the rotating rods and rollers to support the conveyor belt, it ensures that there is no deviation or jamming during the PCB board transportation process.

[0020] 3. In this utility model, the guide rod 1 at the top of the support frame 1 and the guide rod 2 of the lifting component form a double guide, which respectively restricts the vertical movement of the support frame 2 and the horizontal movement of the moving frame 1 and the moving frame 2, thus avoiding jamming caused by component misalignment. Attached Figure Description

[0021] Figure 1 This is a perspective view of a belt conveyor for vacuum cleaning of PCB boards proposed in this utility model;

[0022] Figure 2 This is a schematic diagram of the moving frame of a belt conveyor for vacuum cleaning of PCB boards proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the support frame of a belt conveyor for vacuum cleaning of PCB boards proposed in this utility model.

[0024] Figure 4 This is a schematic diagram of the connecting pipe structure of a belt conveyor for vacuum cleaning of PCB boards proposed in this utility model.

[0025] Figure 5 This is a schematic diagram of the guide shroud structure of a belt conveyor for vacuum cleaning of PCB boards proposed in this utility model;

[0026] Figure 6This is a schematic diagram of the slider structure of a belt conveyor for vacuum cleaning of PCB boards proposed in this utility model.

[0027] Figure 7 This is a schematic diagram of the synchronous belt structure of a belt conveyor for vacuum cleaning of PCB boards proposed in this utility model.

[0028] Legend:

[0029] 1. Outer shell; 2. Lifting plate; 3. Fixing plate; 4. Laser measuring equipment; 5. Hydraulic rod; 6. Moving frame one; 7. Connecting rod; 8. Guide rod one; 9. Moving frame two; 10. Guide rod two; 11. Support frame one; 12. Support frame two; 13. Support frame three; 14. Rotating rod; 15. Roller; 16. Conveyor belt; 17. Flow guide; 18. Jet nozzle; 19. Connecting pipe one; 20. Connecting pipe two; 21. Flow guide groove; 22. Sliding rod; 23. Sliding block; 24. Spring; 25. Synchronous pulley; 26. Synchronous belt; 27. Motor. Detailed Implementation

[0030] 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.

[0031] Example 1:

[0032] Reference Figure 1 , Figure 3 and Figure 4 One embodiment of this utility model is a belt conveyor for vacuum cleaning of PCB boards, comprising:

[0033] The outer shell 1 has a support frame 11 fixedly connected to the bottom side of the inner wall of the outer shell 1 and a support frame 2 12 slidably connected to the top side of the inner wall of the outer shell 1. The support frame 11 is located on the bottom side of the support frame 2 12. The left end of the support frame 11 is connected to the support frame 2 12 through a lifting assembly. The front end of the outer shell 1 has two fixed plates 3 located on the same straight line. The inner walls of the two fixed plates 3 are fixedly connected to laser measuring equipment 4.

[0034] Two support frames 13 are fixedly connected to the inner walls of support frame 11 and support frame 2 12 respectively. The inner walls of the two support frames 13 are rotatably connected to four rotating rods 14 distributed at the four corners of a parallelogram. In each of the two groups of four rotating rods 14, one rotating rod 14 is longer than the other rotating rods 14. Multiple rollers 15 are fixedly connected to the outer walls of the multiple rotating rods 14. The four rollers 15 in each group that are in the same straight line are connected by a conveyor belt 16. The inner walls of the two support frames 13 are fixedly connected to a flow guide shroud 17. The two flow guide shrouds 17 are fixedly connected to a jet nozzle 18 at the close end of each of the two flow guide shrouds 17. The two flow guide shrouds 17 are connected to a flow guide groove 21 through a pipe at the far end of each of the two flow guide shrouds 17.

[0035] Reference Figure 7 Three synchronous pulleys 25, the inner walls of the two front synchronous pulleys 25 are fixedly connected to the outer walls of the two extended rotating rods 14 respectively, and a tension assembly is provided at the right end of the rear synchronous pulley 25. The three synchronous pulleys 25 are connected by a synchronous belt 26.

[0036] Specifically, the outer shell 1 serves as the overall support frame for the equipment, providing installation reference and protection for all internal components and ensuring the stability of equipment operation. The lifting plate 2 is made of smooth and wear-resistant material with a flat surface, reducing scratch damage to PCB boards during placement. The laser measuring device 4 has high-precision measurement capabilities, enabling it to quickly collect and transmit PCB board thickness data in real time, replacing manual measurement and improving adjustment efficiency and accuracy. Support frame one 11 is a fixed support structure, providing a stable installation base for guide rod one 8 and support frame three 13, preventing the bottom components from shaking and affecting conveying accuracy. Support frame two 12 can slide up and down, and its distance from support frame one 11 can be adjusted to adapt to the conveying needs of PCB boards of different thicknesses. Its sliding trajectory is limited by guide rod one 8, ensuring vertical lifting without deviation. The rotating rod 14 is connected to support frame three 13 through bearings, ensuring smooth rotation without jamming. The design of one long rotating rod 14 in each group of rotating rods 14 ensures that the conveyor belt 16 maintains uniform tension under the support of the parallelogram-distributed rollers 15, avoiding local slack that could cause PCB board conveying deviation. The rollers 15 are made of spring. The conveyor belt 16 is made of a wear-resistant material, which not only supports the stable operation of the conveyor belt 16, but also buffers the slight vibrations during the conveying process, reducing friction damage between the PCB board and the conveyor belt 16. At the same time, the evenly distributed multiple rollers 15 can prevent the conveyor belt 16 from deforming due to excessive local stress. The conveyor belt 16 is made of a smooth, wear-resistant material that is not prone to static electricity, so as to avoid scratching the surface circuit of the PCB board or attracting dust during conveying, ensuring a clean effect. Moreover, it achieves smooth conveying through the linkage of the rollers 15 and the rotating rod 14. The synchronous pulley 25 works closely with the rotating rod 14 and the synchronous belt 26. This ensures that the power of the motor 27 can be synchronously transmitted to all rotating rods 14, preventing the conveyor belt 16 from running off-center due to asynchronous operation of multiple rotating rods 14. The slider 23, slider 22, and spring 24 adjust the position of the synchronous pulley 25 in real time through an elastic compensation mechanism to adapt to the tensile deformation of the synchronous belt 26 after long-term operation, avoid transmission slippage, and extend the service life of the synchronous belt 26. The synchronous belt 26 is made of high-strength wear-resistant rubber material, which has good toughness and high transmission efficiency. It can maintain stability during high-speed operation, reduce power loss, and its wear-resistant properties can extend the replacement cycle.

[0037] Reference Figure 2 , Figure 5 and Figure 6The guide rod 10 located at the left end of support frame 11 and support frame 22 has a sliding connection between its bottom guide rod 10 and its outer wall, and a sliding connection between its top guide rod 10 and its outer wall, and a sliding connection between its top guide rod 10 and its outer wall, and a sliding connection between its left end and its top guide rod 10. The left end of the sliding frame 16 is connected to the sliding frame 29 via a connecting rod 7. One end of the connecting rod 7 is rotatably connected to the left end of the sliding frame 16, and the other end of the connecting rod 7 is rotatably connected to the left end of the sliding frame 29. The slider 23 located at the right end of the rear synchronous wheel 25 is rotatably connected to a slider 23. A sliding rod 22 is slidably connected to the inner wall of the outer shell 1. The sliding rod 22 is fixedly connected to the inner wall of the outer shell 1. Two springs 24 are provided on the outer wall of the sliding rod 22. One end of each spring 24 is connected to the slider 23, and the other end of each spring 24 is connected to the slider 23. The outer shell 1 is connected to the top of the top side guide shroud 17, which is fixedly connected to the top of the top side guide shroud 17. One of the connecting pipes 20 is slidably connected to the outer wall of the connecting pipe 19. The top side connecting pipe 20 is connected to the top side guide channel 21. The bottom end of the bottom side guide shroud 17 is connected to the bottom side guide channel 21 through another connecting pipe 20. The front left side of the outer shell 1 is fixedly connected to the hydraulic rod 5. The rear end of the hydraulic rod 5 is fixedly connected to the outer wall of the moving frame 6. The inner wall of the outer shell 1 is equipped with a motor 27 through a fixed frame. The drive end of the motor 27 is connected to a rotating rod 14 at the rear of the bottom end. The top of the support frame 11 is fixedly connected to the top of the support frame 11. The outer wall of the guide rod 18 is slidably connected to the inner wall of the support frame 2 12. The front end of the outer shell 1 is fixedly connected to the lifting plate 2.

[0038] Specifically, guide rod 2 10 provides a precise sliding trajectory for movable frame 1 6 and movable frame 2 9, restricting their movement to the horizontal direction only. This prevents lateral deviation from causing jamming in the lifting assembly and ensures the vertical movement accuracy of support frame 2 12. Movable frame 1 6 and movable frame 2 9 are made of high-strength, lightweight materials, ensuring structural stability while reducing the driving force loss of hydraulic rod 5. The two are synchronized through connecting rod 7, making the lifting and lowering of support frame 2 12 smooth and wobbly. Connecting rod 7 adopts a rotatable connection design, which can convert the horizontal movement of movable frame 1 6 into the vertical movement of movable frame 2 9, resulting in high transmission efficiency. The sliding cooperation between guide rod 1 8 and support frame 2 12 further restricts the movement trajectory of support frame 2 12, ensuring that it can only rise and fall vertically. This prevents uneven contact of the upper and lower conveyor belts 16 due to deviation, ensuring smooth PCB board transport. Hydraulic rod 5, as the power source of the lifting assembly, can have its extension and retraction speed precisely adjusted through the main control panel, with stable thrust, and can adjust according to the PCB... The thickness of the plate allows for flexible adjustment of the moving distance of the support frame 2 12, avoiding errors and inefficiencies caused by manual adjustment. The motor 27 is securely installed via a fixed frame, ensuring stable and vibration-free operation. Its speed can be adjusted according to actual needs, providing continuous and stable power to the rotating rod 14 to adapt to different conveying speed requirements. The connecting pipe 1 19 and the connecting pipe 2 20 adopt a sliding connection structure, which can flexibly extend and retract with the up and down movement of the support frame 2 12, ensuring that the airflow path is always unobstructed and that the pipe will not fall off or bend due to the movement of the support frame 2 12. The connecting pipe 2 20 serves as a transmission channel for airflow and dust, with a smooth inner wall to reduce airflow resistance and dust adhesion. The slide rod 22 provides a stable sliding track for the slider 23, ensuring accurate trajectory when the slider 23 drives the synchronous wheel 25, and avoiding uneven force on the synchronous belt 26. The spring 24 has good elastic deformation capability and durability, and pushes the slider 23 through bidirectional elastic force to achieve real-time compensation of the position of the synchronous wheel 25, adapting to the tension changes of the synchronous belt 26 under different working conditions.

[0039] Example 2:

[0040] A conveying method for a belt conveyor used in vacuum cleaning of PCB boards includes the following steps:

[0041] Step 1: After the PCB board to be cleaned is placed on the support plate 2, the laser measuring device 4 on the two fixed plates 3 will measure the thickness of the board.

[0042] Step 2: The measured thickness data will be transmitted to the main control screen on the left side of the outer casing 1. The operator will select the appropriate spacing between support frame 11 and support frame 22 according to the measured thickness.

[0043] Step 3: After selection, the main control screen drives the hydraulic rod 5 to run, and the hydraulic rod 5 pulls the moving frame 6 to slide along the bottom guide rod 10.

[0044] Step 4: The first movable frame 6 pushes the second movable frame 9 to slide upward synchronously along the top guide rod 10 through the connecting rod 7, thereby driving the second support frame 12 to move up and down along the guide rod 8 until the upper and lower sets of conveyor belts 16 are in contact with the upper and lower surfaces of the PCB board.

[0045] Step 5: Start motor 27. Motor 27 drives the rotating rod 14 at the bottom rear side to rotate. Under the action of synchronous pulley 25, synchronous belt 26 and conveyor belt 16, all rotating rods 14 are driven to rotate synchronously. Conveyor belt 16 transports PCB board. At the same time, airflow is connected to guide channel 21. The airflow is concentrated through guide shroud 17. Finally, the airflow is compressed by jet head 18 and sprayed onto the surface of PCB board to clean the surface dust.

[0046] Step 6: During the conveying process, the spring 24 of the tension assembly pushes the slider 23 to move along the slide bar 22 through the elastic force, and adjusts the position of the rear synchronous pulley 25 in real time to ensure that the synchronous belt 26 is always in a suitable tension state.

[0047] Step 7: After the PCB board is cleaned, it is conveyed to the output end of the equipment via conveyor belt 16, completing the entire conveying and cleaning process.

[0048] The thickness measurement accuracy of the laser measuring device 4 is not less than 0.01mm, ensuring that the interval adjustment of support frame 11 and support frame 2 12 is accurately matched with the PCB board thickness. The extension and retraction speed of the hydraulic rod 5 can be adjusted through the main control panel, with an adjustment range of 5-15mm per second, to avoid damage to the PCB board due to excessive adjustment. The synchronous belt 26 is made of wear-resistant rubber, and its tension is compensated in real time by the elastic deformation of the spring 24, with a compensation range of 5-20mm, to ensure transmission stability.

[0049] Working principle: First, the PCB board is placed on the support plate 2. Two laser measuring devices 4 at the front end of the outer shell 1 synchronously collect the board thickness data and transmit it to the main control screen. The main control screen drives the hydraulic rod 5 to run according to the data. The hydraulic rod 5 pulls the moving frame 6 on the bottom guide rod 10 to slide. The moving frame 6 drives the moving frame 9 on the top guide rod 10 to slide synchronously through the connecting rod 7. In turn, it pulls the support frame 12 to move up and down along the guide rod 8, so that the upper and lower conveyor belts 16 are precisely attached to the upper and lower surfaces of the PCB board to adapt to boards of different thicknesses. Then, the motor 27 is started. The motor 27 drives the bottom rear rotating rod 14 to rotate. The rotating rod 14 forms a transmission with the synchronous wheel 25 and synchronous belt 26 on the outer wall of the two front rotating rods 14. The moving link drives all rotating rods 14 to operate synchronously, and the conveyor belt 16 smoothly transports the PCB board. At the same time, the airflow is connected to the guide channel 21. The airflow is introduced into the guide shroud 17 through the connecting pipe 20 and the connecting pipe 19, and then evenly sprayed onto the surface of the PCB board through the jet nozzle 18 on the guide shroud 17 to blow away the dust. The blown-away dust flows back to the guide shroud 17 with the airflow and is then discharged through the pipe into the guide channel 21. During the conveying process, the two springs 24 on the outer wall of the slide rod 22 push the slider 23 to move along the slide rod 22 through elastic deformation, and adjust the position of the rear synchronous wheel 25 in real time to ensure that the synchronous belt 26 is always in a stable tension state, avoiding transmission slippage or jamming. Finally, the cleaned PCB board is transported to the output end of the equipment to complete the whole process.

[0050] It is worth noting that the circuits, measurements, airflow access, and dust discharge involved in the above embodiments all adopt corresponding existing technologies according to the actual situation, and therefore will not be described in detail in the embodiments of this application.

[0051] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A belt conveyor for vacuum cleaning of PCB boards, characterized in that, include: The outer shell (1) has a support frame one (11) fixedly connected to the bottom side of the inner wall of the outer shell (1), and a support frame two (12) slidably connected to the top side of the inner wall of the outer shell (1). The support frame one (11) is located on the bottom side of the support frame two (12). The left end of the support frame one (11) is connected to the support frame two (12) through a lifting assembly. The front end of the outer shell (1) has two fixed plates (3) located on the same straight line. The inner walls of the two fixed plates (3) are fixedly connected to laser measuring equipment (4). Two support frames (13) are fixedly connected to the inner walls of support frame 1 (11) and support frame 2 (12) respectively. The inner walls of the two support frames (13) are rotatably connected to four rotating rods (14) distributed in a parallelogram at the four corners. In each of the two groups of four rotating rods (14), one rotating rod (14) is longer than the other rotating rods (14). The outer walls of the multiple rotating rods (14) are fixedly connected to multiple rollers (15). The four rollers (15) in each group that are in the same straight line are connected by a conveyor belt (16). The inner walls of the two support frames (13) are fixedly connected to a flow guide (17). The two flow guides (17) are fixedly connected to a jet nozzle (18) at the close end of the two flow guides (17). The two flow guides (17) are connected to a flow guide groove (21) through a pipe at the far end of the two flow guides (17). Three synchronous pulleys (25), the inner walls of the two front synchronous pulleys (25) are fixedly connected to the outer walls of the two extended rotating rods (14), and a tension assembly is provided at the right end of the rear synchronous pulley (25). The three synchronous pulleys (25) are connected by a synchronous belt (26).

2. The belt conveyor equipment for vacuum cleaning of PCB boards according to claim 1, characterized in that: The lifting assembly includes a guide rod 2 (10) located at the left end of support frame 1 (11) and support frame 2 (12). The outer wall of the guide rod 2 (10) on the bottom side is slidably connected to a movable frame 1 (6), and the outer wall of the guide rod 2 (10) on the top side is slidably connected to a movable frame 2 (9). The left end of the movable frame 1 (6) is connected to the movable frame 2 (9) through a connecting rod (7). One end of the connecting rod (7) is rotatably connected to the left end of the movable frame 1 (6), and the other end of the connecting rod (7) is rotatably connected to the left end of the movable frame 2 (9).

3. The belt conveyor equipment for vacuum cleaning of PCB boards according to claim 1, characterized in that: The tension assembly includes a slider (23) rotatably connected to the right end of the rear synchronous wheel (25). A slide rod (22) is slidably connected to the inner wall of the slider (23). The slide rod (22) is fixedly connected to the inner wall of the outer shell (1). Two springs (24) are provided on the outer wall of the slide rod (22). One end of each spring (24) is connected to the slider (23), and the other end of each spring (24) is connected to the outer shell (1).

4. A belt conveyor for vacuum cleaning of PCB boards according to claim 1, characterized in that: The top of the top side of the flow guide (17) is fixedly connected to a connecting pipe (19), and a connecting pipe (20) is slidably connected to the outer wall of the connecting pipe (19). The top side connecting pipe (20) is connected to the top side flow guide groove (21), and the bottom end of the bottom side of the flow guide (17) is connected to the bottom side flow guide groove (21) through another connecting pipe (20).

5. A belt conveyor for vacuum cleaning of PCB boards according to claim 1, characterized in that: A hydraulic rod (5) is fixedly connected to the left front end of the outer shell (1), and the rear end of the hydraulic rod (5) is fixedly connected to the outer wall of the mobile frame (6).

6. A belt conveyor for vacuum cleaning of PCB boards according to claim 1, characterized in that: A motor (27) is mounted on the inner wall of the outer shell (1) via a fixing frame. The driving end of the motor (27) is connected to a rotating rod (14) on the rear side of the bottom end.

7. A belt conveyor for vacuum cleaning of PCB boards according to claim 1, characterized in that: The top of the support frame one (11) is fixedly connected to the guide rod one (8), and the outer wall of the guide rod one (8) is slidably connected to the inner wall of the support frame two (12).

8. A belt conveyor for vacuum cleaning of PCB boards according to claim 1, characterized in that: The front end of the outer shell (1) is fixedly connected to a support plate (2).

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