A fully automatic PCB board loading and unloading machine

Abstract

A fully automatic PCB board loading and unloading machine, comprising: a loading machine and an unloading machine. Both the loading machine and the unloading machine include a material transportation cart and a feeding system. The feeding system includes a lifting component, a picking and placing component, and a belt conveyor component supported by a frame. In the loading machine, after the material transportation cart is located in the U-shaped space of the frame and positioned by a limiting component, the PCB board is lifted to the picking height by the lifting component. The picking and placing component transfers the topmost PCB board to the belt conveyor component through a suction cup and conveys it to the next process. The operation of the unloading machine is opposite. Among them, the working dimensions of both the belt conveyor component and the material transportation cart can be adjusted to meet the use of different PCB boards. The loading and unloading machine involved in the present invention can automatically complete the loading and unloading operations, meet the needs of automated operations, improve work efficiency, reduce damage caused by manual operations, have a wide applicability, and can be docked with the transfer ports of different production lines, shortening the production cycle of PCB boards as a whole.

Description

Technical Field

[0001] The present invention relates to the technical field of PCB board loading and unloading equipment, and particularly to a fully automatic PCB board loading and unloading machine for PCB boards. Background Art

[0002] At present, the electronics industry is advancing by leaps and bounds, and the demand in the PCB circuit board industry is very large. The PCB board, also known as the printed circuit board, is the provider of electrical connections for electronic components. The main advantages of the PCB board are that it greatly reduces wiring and assembly errors, and improves the automation level and labor productivity. When the PCB board is being produced and processed, a loading and unloading machine is required to load and unload the PCB board into a storage frame for storage, which facilitates the staff to process, sort, and package the PCB board. The invention patents with the application dates of CN201921471744.6 and CN202210509161.8 both involve loading and unloading machines for PCB boards, which meet the storage work in the PCB board production process to a certain extent, but there are still the following problems to be improved:

[0003] The automation level of PCB board loading and unloading is relatively low, and the work efficiency is low, which is not conducive to the automatic information transformation of the workshop and the layout planning of MES;

[0004] The loading and unloading machine can only load and unload PCB boards with the same width and thickness, and the adaptability is relatively low.

[0005] The present invention proposes a fully automatic PCB board loading and unloading machine to solve one or more of the above technical problems. Summary of the Invention

[0006] A fully automatic PCB board loading and unloading machine for PCB boards includes a material transportation cart and a loading system. The material transportation cart is used to carry the PCB boards to be transported, and the loading system transfers the PCB boards in the material transportation cart to the area of the next process flow.

[0007] Preferably, in the fully automatic PCB board loading and unloading machine for PCB boards, the loading system includes a lifting component, a pick-and-place component, a belt conveyor component, and a frame. The lifting component, the pick-and-place component, and the belt conveyor component are all installed and supported by the frame.

[0008] Preferably, in the fully automatic PCB board loading and unloading machine for PCB boards, the frame includes a first frame for installing the pick-and-place component, a second frame for installing the belt conveyor component, and a third frame for installing the control equipment. The first frame, the second frame, and the third frame enclose a U-shaped space. The feeding end of the material transportation cart is located at the open end of the U-shaped space, and the lifting component is also installed in the U-shaped space.

[0009] Preferably, for the fully automatic PCB board loading and unloading machine, the lifting assembly includes a motor-screw module and a lifting table surface. The lifting table surface is fixed to the screw nut in the motor-screw module, and the motor-screw module is installed on the board surface of the second frame.

[0010] Preferably, for the fully automatic PCB board loading and unloading machine, the loading and unloading component includes a suction cup equipped with a vacuum suction nozzle, a lifting and picking cylinder, and a left and right translation cylinder. The lifting and picking cylinder is fixed to the translation output end of the left and right translation cylinder, the lifting output end of the lifting and picking cylinder is fixed to the suction cup, and the left and right translation cylinder is installed in the space of the first frame.

[0011] Preferably, for the fully automatic PCB board loading and unloading machine, the belt conveyor assembly includes a fixed belt module, a movable belt module, and a reference edge aluminum block. The fixed belt module includes a first driving wheel, a first belt wheel mounting plate, and a belt. The first driving wheel is fixed to the power output end of the motor, the motor is installed on the outer board surface of the first belt wheel mounting plate, a belt wheel is installed on the inner board surface of the first belt wheel mounting plate, the belt passes around the first driving wheel and the belt wheel, and the reference edge aluminum block is fixed to the upper board surface of the first belt wheel mounting plate; the movable belt module includes a distance adjustment motor, a distance adjustment synchronous belt wheel, a screw rod, a second belt wheel mounting plate, a second belt wheel mounting plate support plate, a second driving wheel, and a belt. The two distance adjustment synchronous belt wheels are respectively fixed to the output shaft of the distance adjustment motor and the end of the screw rod, the two distance adjustment synchronous belt wheels are connected by a synchronous belt in a transmission manner, the two ends of the screw rod are rotatably connected to the board surfaces of the first belt wheel mounting plate and the second belt wheel mounting plate support plate through rolling bearings, the second belt wheel mounting plate is connected to the screw rod through a screw nut, a belt wheel is installed on the inner board surface of the second belt wheel mounting plate, the second driving wheel is fixed to the output end of the motor, the belt wheel and the second driving wheel are connected by a belt in a transmission manner, the motor driving the second driving wheel to rotate is fixed to the board surface of the second belt wheel mounting plate, the first belt wheel mounting plate and the second belt wheel mounting plate support plate are both fixed to the upper board surface of the second frame, the distance adjustment motor is installed on the board surface of the second belt wheel mounting plate support plate, and the reference edge aluminum block is fixed to the upper board surface of the second belt wheel mounting plate.

[0012] Preferably, for the fully automatic PCB board loading and unloading machine, the belt conveyor assembly further includes a guide shaft. The two ends of the guide shaft are respectively fixed to the first belt wheel mounting plate and the second belt wheel mounting plate support plate, and the guide shaft is connected to the second belt wheel mounting plate through a linear bearing.

[0013] Preferably, for the full-automatic PCB board loading and unloading machine, the belt conveying assembly further includes a pallet, which includes a pallet body, a locking plate, and rollers. Guide shaft mounting grooves are machined on the plate surfaces of the pallet body and the locking plate. The pallet body and the locking plate are engaged with the guide shafts through the guide shaft mounting grooves. The pallet body and the locking plate are fixedly connected by bolts. The rollers are installed near the upper end surface of the pallet body.

[0014] Preferably, for the full-automatic PCB board loading and unloading machine, the material handling trolley includes a frame with universal wheels, a carriage, and a partition. The carriage is arranged on the upper plate surface of the frame. The partition is inserted into the partition groove on the inner wall of the carriage. The PCB boards are placed in the space enclosed by the partition and the carriage. The carriage is composed of three vertically placed enclosing plates.

[0015] Preferably, for the full-automatic PCB board loading and unloading machine, the material handling trolley further includes a limiting assembly, which includes a clamping jaw cylinder and a male head column. The cylinder body of the clamping jaw cylinder is fixed on the plate surface of the second frame. The male head column is fixed at the lower end of the front plate surface of the frame. A clamping groove matching the male head column is machined on the inner side of the output end of the clamping jaw cylinder. After the sensor senses that the material handling trolley is in place, the pneumatic clamping jaw cylinder clamps the male head column to complete the positioning of the material handling trolley.

[0016] Preferably, for the full-automatic PCB board loading and unloading machine, the limiting assembly further includes a buffer head or / and a guiding and buffering wheel set. The buffer head is arranged at the front end of the position where the frame runs in place and abuts against the lower plate surface of the frame. The guiding and buffering wheel set includes a guiding strip and rollers. The rollers are installed in the guiding strip. The two guiding strips are respectively fixed on the plate surfaces of the first frame and the third frame.

[0017] Preferably, for the full-automatic PCB board loading and unloading machine, the material handling trolley is provided with a trolley pallet. The carriage is arranged on the upper plate surface of the trolley pallet. The PCB boards are placed in the space enclosed by the trolley pallet, the carriage, and the partition. The lifting table surface and the plane position of the trolley pallet are complementary.

[0018] The advantages are as follows:

[0019] The material handling trolley in the full-automatic PCB board loading and unloading machine involved in the present invention can be manually pushed to the position of the loading system or driven to the position of the loading system by the navigation system, with high selectivity and high automation degree;

[0020] The full-automatic PCB board loading and unloading machine involved in the present invention realizes an automated process of loading, picking, placing, and conveying, saving manpower and material resources, avoiding unnecessary damage caused by humans, and greatly improving the working efficiency of PCB board production;

[0021] The fully automatic PCB board loading and unloading machine involved in the present invention can adjust the conveying distance of the partition board according to the size of the PCB board from the feeding trolley to the belt conveying component. One set of equipment can be used for loading and unloading multiple different specifications of PCB boards, with high versatility;

[0022] The fully automatic PCB board loading and unloading machine involved in the present invention can be moved to a designated area to dock with the PCB board production line, which helps the automatic informatization transformation of the workshop and the layout planning of MES;

[0023] In the fully automatic PCB board loading and unloading machine involved in the present invention, the board receiving machine and the board discharging machine are respectively placed at the feeding end and the discharging end of the PCB board processing equipment to complete the automatic feeding and receiving of the PCB board. And in the board receiving machine and the board discharging machine, whether to use the belt conveying component can be freely selected according to the transfer distance between the feeding / discharging port of the PCB board processing equipment and the loading / unloading component and the equipment interference situation, with high flexibility. Description of the Drawings

[0024] The following further explains the specific implementation manners in conjunction with the drawings, where:

[0025] Figure 1 is the overall structural schematic diagram of the automatic board receiving machine or the automatic board discharging machine in the fully automatic PCB board loading and unloading machine involved in the present invention;

[0026] Figure 2 is the partial structural schematic diagram of the automatic board receiving machine or the automatic board discharging machine in the fully automatic PCB board loading and unloading machine involved in the present invention;

[0027] Figure 3 is the structural schematic diagram of the material transporting trolley and the lifting component;

[0028] Figure 4 is the structural schematic diagram of the belt conveying component;

[0029] Figure 5 is the structural schematic diagram of the pallet;

[0030] The specific structures corresponding to the numbers are as follows:

[0031] Frame 1, trolley supporting plate 11, carriage 2, partition 3, limit component 4, clamping jaw cylinder 41, male head column 42, buffer head 43, guiding buffer wheel set 44, lifting component 5, motor-screw module 51, lifting table 52, loading and unloading component 6, suction cup 61, lifting loading and unloading cylinder 62, left and right translation cylinder 63, belt conveying component 7, fixed belt module 71, first driving wheel 711, first belt wheel mounting plate 712, movable belt module 72, distance adjusting motor 721, distance adjusting synchronous belt wheel 722, lead screw 723, second belt wheel mounting plate 724, second belt wheel mounting plate support 725, second driving wheel 726, reference edge aluminum block 73, guiding shaft 74, pallet 75, pallet body 751, locking plate 752, roller 753, frame 8, first frame 81, second frame 82, third frame 83, start button 831, stop button 832, emergency stop button 833, three-color lamp 834,

[0032] The following specific embodiments will further illustrate the present invention in conjunction with the above-mentioned drawings. Specific embodiments

[0033] Specific embodiment 1:

[0034] A fully automatic PCB board loading and unloading machine for PCB boards, comprising: an automatic board collecting machine and an automatic board loading machine. Both the automatic board collecting machine and the automatic board loading machine include a material transporting trolley and a loading system. The material transporting trolley is used to carry the PCB boards to be transported. The loading system of the automatic board loading machine transfers the PCB boards in the material transporting trolley to the area of the next process flow (i.e., the feeding port end of the PCB board processing equipment). The automatic board collecting machine transfers the processed PCB boards from the processing equipment to the material transporting trolley and transfers them to the next working area through the material transporting trolley.

[0035] The feeding system of the automatic plate collecting machine includes a lifting assembly 5, a pick-and-place assembly 6, and a frame 8. The lifting assembly 5 and the pick-and-place assembly 6 are installed and supported by the frame 8. The frame 8 includes a first frame 81 for installing the pick-and-place assembly 6, a second frame 82, and a third frame 83 for installing control equipment. The first frame 81, the second frame 82, and the third frame 83 enclose a U-shaped space. The feeding end of the material transport cart is located at the open end of the U-shaped space, and the lifting assembly 5 is also installed within the U-shaped space. Setting the open end of the U-shaped space that encloses the space as the feeding end position of the material transport cart: on the one hand, it facilitates the guiding movement of the material transport cart and is convenient for the positioning of the feeding cart; on the other hand, it does not occupy other spaces during the working process. The lifting assembly 5 includes a motor-screw module 51 and a lifting table 52. The lifting table 52 is fixed to the screw nut in the motor-screw module 51, and the motor-screw module 51 is installed on the plate surface of the second frame 82. The pick-and-place assembly 6 includes a suction cup 61 equipped with a vacuum suction nozzle, a lifting pick-up cylinder 62, and a left-right translation cylinder 63. The lifting pick-up cylinder 62 is fixed to the translation output end of the left-right translation cylinder 63, and the lifting output end of the lifting pick-up cylinder 62 is fixed to the suction cup 61. The left-right translation cylinder 63 is installed within the space of the first frame 81.

[0036] The feeding system of the automatic plate discharging machine includes a lifting assembly 5, a pick-and-place assembly 6, a belt conveyor assembly 7, and a frame 8. The lifting assembly 5, the pick-and-place assembly 6, and the belt conveyor assembly 7 are installed and supported by the frame 8. The frame 8 includes a first frame 81 for installing the pick-and-place assembly 6, a second frame 82 for installing the belt conveyor assembly 7, and a third frame 83 for installing control equipment. The first frame 81, the second frame 82, and the third frame 83 enclose a U-shaped space. The feeding end of the material transport cart is located at the open end of the U-shaped space, and the lifting assembly 5 is also installed within the U-shaped space. Setting the open end of the U-shaped space that encloses the space as the feeding end position of the material transport cart: on the one hand, it facilitates the guiding movement of the material transport cart and is convenient for the positioning of the feeding cart; on the other hand, it does not occupy other spaces during the working process. The lifting assembly 5 includes a motor-screw module 51 and a lifting table 52. The lifting table 52 is fixed to the screw nut in the motor-screw module 51, and the motor-screw module 51 is installed on the plate surface of the second frame 82. The pick-and-place assembly 6 includes a suction cup 61 equipped with a vacuum suction nozzle, a lifting pick-up cylinder 62, and a left-right translation cylinder 63. The lifting pick-up cylinder 62 is fixed to the translation output end of the left-right translation cylinder 63, and the lifting output end of the lifting pick-up cylinder 62 is fixed to the suction cup 61. The left-right translation cylinder 63 is installed within the space of the first frame 81.

[0037] The belt conveyor assembly 7 includes a fixed belt module 71, a movable belt module 72, and a reference edge aluminum block 73. The fixed belt module 71 includes a first driving pulley 711, a first belt pulley mounting plate 712, and a belt. The first driving pulley 711 is fixed to the power output end of the motor, and the motor is mounted on the outer plate surface of the first belt pulley mounting plate 712. A belt pulley is mounted on the inner plate surface of the first belt pulley mounting plate 712. The belt passes around the first driving pulley 711 and the belt pulley. The reference edge aluminum block 73 is fixed to the upper plate surface of the first belt pulley mounting plate 712. The movable belt module 72 includes a distance adjustment motor 721, a distance adjustment synchronous pulley 722, a lead screw 723, a second belt pulley mounting plate 724, a second belt pulley mounting plate support 725, a second driving pulley 726, and a belt. The two distance adjustment synchronous pulleys 722 are respectively fixed to the output shaft of the distance adjustment motor 721 and the end of the lead screw 723. The two distance adjustment synchronous pulleys 722 are connected by a synchronous belt for transmission. The two ends of the lead screw 723 are rotatably connected to the plate surfaces of the first belt pulley mounting plate 712 and the second belt pulley mounting plate support 725 through rolling bearings. The second belt pulley mounting plate 724 is connected to the lead screw 723 through a lead screw nut. A belt pulley is mounted on the inner plate surface of the second belt pulley mounting plate 724. The second driving pulley 726 is fixed to the output end of the motor. The belt pulley and the second driving pulley 726 are connected by a belt for transmission. The motor driving the second driving pulley 726 to rotate is fixed to the plate surface of the second belt pulley mounting plate 724. The first belt pulley mounting plate 712 and the second belt pulley mounting plate support 725 are both fixed to the upper plate surface of the second frame 82. The distance adjustment motor 721 is mounted on the plate surface of the second belt pulley mounting plate support 725. The reference edge aluminum block 73 is fixed to the upper plate surface of the second belt pulley mounting plate 724.

[0038] Adjust the distance between the movable belt module 72 and the fixed belt module 71 according to the width of the PCB board. The two side edges of the PCB board are respectively located on the belts of the movable belt module 72 and the fixed belt module 71 for conveying. During the conveying process, the reference edge aluminum blocks 73 on both sides are used for the conveying limit of the PCB board.

[0039] A start button 831, a stop button 832, an emergency stop button 833, and a three-color lamp 834 are mounted on the outer plate surface of the third frame 83.

[0040] The material transport cart includes a frame 1 with universal wheels, a carriage 2, and a partition 3. The upper plate surface of the frame 1 is provided with the carriage 2. The partition 3 is inserted into a partition slot on the inner wall of the carriage 2. The PCB board is placed in the space enclosed by the partition 3 and the carriage 2. The carriage 2 is composed of 3 vertically placed enclosing boards (without boards at the upper and lower ends and with an opening on one side), and the stacking and feeding of PCB boards with different areas can be satisfied by adjusting the insertion position of the partition 3.

[0041] Specific implementation case 2:

[0042] Based on specific implementation case 1, the loading system of the automatic board collecting machine includes a lifting component 5, a board placing and picking component 6, a belt conveyor component 7, and a frame 8. Since the transfer distance between the board placing and picking component 6 and the PCB board production equipment is relatively long, the product is first placed on the belt conveyor component 7 for conveyance. The board placing and picking component 6 adsorbs the PCB board that has been conveyed to the position and places it into the feeding cart through the lifting component 5. The operation of the automatic board placing machine is opposite. After the lifting component 5 raises the PCB board in the feeding cart to the suction height, the board placing and picking component 6 places the PCB boards one by one into the belt conveyor component 7 and enters the processing area through the inlet end of the PCB board processing equipment.

[0043] Specific implementation case 3:

[0044] Based on specific implementation cases 1 and 2, the fully automatic board collecting and placing machine for PCB boards can also adopt one or more of the following preferred technical solutions.

[0045] Optionally, the belt conveyor component 7 further includes a guide shaft 74. The two ends of the guide shaft 74 are respectively fixed to the first belt pulley mounting plate 712 and the second belt pulley mounting plate support plate 725. The guide shaft 74 is connected to the second belt pulley mounting plate 724 through a linear bearing. The guide shaft 74 plays a role in connecting and supporting the movable belt module 72 on the one hand, and a role in moving and guiding on the other hand.

[0046] Optionally, the belt conveyor assembly 7 further includes a support plate 75, which includes a support plate body 751, a locking plate 752, and rollers 753. Guide shaft mounting grooves are machined on the plate surfaces of the support plate body 751 and the locking plate 752. The support plate body 751 and the locking plate 752 are engaged with the guide shaft 74 through the guide shaft mounting grooves. The support plate body 751 and the locking plate 752 are fixedly connected by bolts. The rollers 753 are installed near the upper end surface of the support plate body 751. The support plate 75 is arranged at the center of the distance between the first pulley mounting plate 712 and the second pulley mounting plate support 725 or at a position of L / 3 on one side of the distance center (defining the distance between the first pulley mounting plate 712 and the second pulley mounting plate support 725 as L). This is mainly to avoid the problem of the entire PCB board surface sagging due to gravity during the conveying process due to the excessive area of the PCB board. The support plate 75 can not only support the center of the thinner PCB board, but also help the conveyance of the PCB board through the rollers 753.

[0047] Optionally, the material transport cart is also provided with a navigation drive system, which can plan its own route to move to the destination and can bypass obstacles encountered during operation.

[0048] Optionally, the material transport cart further includes a limit component 4, which includes a jaw cylinder 41 and a male head column 42. The cylinder body of the jaw cylinder 41 is fixed on the plate surface of the second frame 82. The male head column 42 is fixed at the lower end of the front plate surface of the vehicle frame 1. A clamping groove matching the male head column 42 is machined on the inner side of the output end of the jaw cylinder 41. After the sensor senses that the material transport cart is in place, the pneumatic jaw cylinder 41 clamps the male head column to complete the positioning of the material transport cart.

[0049] Preferably, for the fully automatic PCB board loading and unloading machine, the limit component 4 further includes a buffer head 43 and a guide buffer wheel set 44. The buffer head 43 is arranged at the front end of the position after the vehicle frame 1 runs in place and abuts against the lower plate surface of the vehicle frame 1. For example, the buffer head 43 can be directly fixed on the plate surface of the second frame 82 or fixed on the plate surface of the jaw cylinder 41 (as Figure 3 shown); the guide buffer wheel set 44 includes a guide bar and rollers. The rollers are installed in the guide bar. The two guide bars are respectively fixed to the plate surfaces of the first frame 81 and the third frame 83. The setting of the buffer head 43 can prevent the material transport cart from colliding with the outer plate of the equipment of the feeding system during operation or being clamped. The guide buffer wheel set 44 guides the material transport cart to correct its orientation under the guiding action of the guide buffer wheel set 44 during the process of running from the outside to the feeding station of the feeding system, ensuring the smooth progress of the subsequent clamping operation and the smooth material taking operation after clamping.

[0050] Optionally, the material transport cart is provided with a cart pallet 11, the carriage 2 is arranged on the upper plate surface of the cart pallet 11, and the PCB board is placed in the enclosed space surrounded by the cart pallet 11, the carriage 2 and the partition 3. The lifting table surface 52 is complementarily arranged with the plane position of the cart pallet 11 (that is, the structures of the lifting table surface 52 and the cart pallet 11 are staggered and do not overlap in the plane position, as Figure 3 shown, the lifting table surface 52 can be lifted from the gap of the cart pallet 11).

[0051] The above embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. An automatic loading and unloading machine for PCB boards, characterized in that: The automatic board collecting machine and the automatic board feeding machine both include a material transporting trolley and a loading system. The material transporting trolley is used to carry the PCB boards to be transported. The loading system transfers the PCB boards in the material transporting trolley to the area of the next process flow or transfers the processed PCB boards into the material transporting trolley. The loading system includes a frame, and the frame includes a first frame, a second frame for installing the picking and placing component, and a third frame for installing the control equipment. The first frame, the second frame, and the third frame enclose a U-shaped space, and the feeding end of the material transporting trolley is located at the open end of the U-shaped space. The loading system further includes a belt conveying component. The second frame is used to install the belt conveying component. The belt conveying component includes a fixed belt module, a movable belt module, and a reference edge aluminum block. The fixed belt module includes a first driving wheel, a first belt wheel mounting plate, and a belt. The first driving wheel is fixed to the power output end of the motor, and the motor is installed on the outer plate surface of the first belt wheel mounting plate. A belt wheel is installed on the inner plate surface of the first belt wheel mounting plate. The belt bypasses the first driving wheel and the belt wheel. The reference edge aluminum block is fixed on the upper plate surface of the first belt wheel mounting plate. The movable belt module includes a distance adjusting motor, a distance adjusting synchronous belt pulley, a lead screw, a second belt wheel mounting plate, a second belt wheel mounting plate support plate, a second driving wheel, and a belt. The two distance adjusting synchronous belt pulleys are respectively fixed to the output shaft of the distance adjusting motor and the end of the lead screw. The two distance adjusting synchronous belt pulleys are connected by a synchronous belt in a transmission manner. The two ends of the lead screw are rotatably connected to the plate surfaces of the first belt wheel mounting plate and the second belt wheel mounting plate support plate through rolling bearings. The second belt wheel mounting plate is connected to the lead screw through a lead screw nut. A belt wheel is installed on the inner plate surface of the second belt wheel mounting plate. The second driving wheel is fixed to the output end of the motor. The belt wheel and the second driving wheel are connected by a belt in a transmission manner to drive the second driving wheel to rotate. The motor driving the second driving wheel to rotate is fixed to the plate surface of the second belt wheel mounting plate. The first belt wheel mounting plate and the second belt wheel mounting plate support plate are both fixed to the upper plate surface of the second frame. The distance adjusting motor is installed on the plate surface of the second belt wheel mounting plate support plate. The reference edge aluminum block is fixed on the upper plate surface of the second belt wheel mounting plate. The belt conveying component further includes a guide shaft, and the two ends of the guide shaft are respectively fixed to the first belt wheel mounting plate and the second belt wheel mounting plate support plate. The guide shaft is connected to the second belt wheel mounting plate through a linear bearing. The belt conveying component further includes a support plate, and the support plate includes a support plate body, a locking plate, and rollers. Guide shaft mounting grooves are machined on the plate surfaces of the support plate body and the locking plate. The support plate body and the locking plate are engaged with the guide shaft through the guide shaft mounting grooves. The support plate body and the locking plate are fixedly connected by bolts. The rollers are installed near the upper end surface of the support plate body.

2. The fully automatic PCB board loading and unloading machine according to claim 1, characterized in that: The feeding system also includes a lifting component and a material placing and taking component. The lifting component, the material placing and taking component and the belt transmission component are all installed and supported by the frame; the lifting component is also installed in the U-shaped space.

3. The full-automatic PCB board loading and unloading machine according to claim 2, wherein: The lifting assembly includes a motor-screw module and a lifting table, the lifting table is fixed to the screw nut in the motor-screw module, and the motor-screw module is installed on the plate surface of the second frame; the material placement and picking assembly includes a suction cup with a vacuum suction nozzle, a lifting and picking cylinder, and a left and right translation cylinder, the lifting and picking cylinder is fixed to the translation output end of the left and right translation cylinder, the lifting output end of the lifting and picking cylinder is fixed to the suction cup, and the left and right translation cylinder is installed in the space of the first frame.

4. The fully automatic board loading and unloading machine for PCB boards according to claim 3, characterized in that: The material transport cart includes a frame with universal wheels, a carriage, and a partition. The carriage is provided on the upper plate surface of the frame. The partition is inserted into a partition groove on the inner wall of the carriage. The PCB board is placed in the space enclosed by the partition and the carriage. The carriage is composed of three vertically placed panels.

5. The fully automatic PCB board loading and unloading machine according to claim 4, wherein: The material transport cart also includes a limiting component, which includes a clamping cylinder and a male column. The cylinder body of the clamping cylinder is fixed to the panel of the second frame, and the male column is fixed to the lower end of the front panel of the frame. A clamping groove matching the male column is processed on the inner side of the output end of the clamping cylinder. After the sensor senses that the material transport cart is in place, the pneumatic clamping cylinder clamps the male column to complete the positioning of the material transport cart.

6. The fully automatic PCB board loading and unloading machine according to claim 5, characterized in that: The limiting assembly also includes a buffer head and / or a guide buffer wheel group, wherein the buffer head is arranged at the front end of the position after the frame moves into position and contacts the lower end plate surface of the frame; the guide buffer wheel group includes a guide bar and a roller, wherein the roller is installed in the guide bar, and the two guide bars are respectively fixed to the plate surfaces of the first frame and the third frame.

7. The fully automatic PCB board loading and unloading machine according to claim 4, characterized in that: The material transport cart is provided with a cart pallet, the carriage is arranged on the upper plate surface of the cart pallet, the PCB board is placed in the space enclosed by the cart pallet, the carriage and the partition, and the lifting platform is arranged in a complementary position to the plane position of the cart pallet.

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