PCB (Printed Circuit Board) conveying machine

Abstract

The utility model discloses a PCB (Printed Circuit Board) conveying machine, a first conveying unit is arranged below a rack, a frame returning mechanism is arranged above the first conveying unit, the first conveying unit comprises a first width adjusting mechanism and a first material frame supporting mechanism, and the first width adjusting mechanism is used for adjusting the width of a first material frame structure according to the sizes of different PCBs or material frames; the first conveying unit is connected with a plate conveying lifting mechanism, and the plate conveying lifting mechanism is used for lifting a material frame; the frame returning mechanism is provided with a pushing mechanism, the pushing mechanism is used for pushing the PCBs out of the material frames, the PCB feeding machine can automatically adapt to various standard material frames through the automatic width adjusting structure, use is more convenient, the space utilization degree is higher and higher, use is convenient, meanwhile, cost is saved, the applicability of equipment is greatly improved, and the PCB feeding machine is suitable for popularization and application. The stability and accuracy of the material frame in the lifting process are ensured, the pushing efficiency is improved, and potential damage in the pushing process is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of plate feeding machine, especially a PCB plate feeding machine. BACKGROUND

[0002] The upper and lower plate machine is one of the automatic devices commonly used in the PCB production line, at present, the PCB plates used are gathered on a jig to realize automatic feeding and collecting, the structure for fixing the PCB plates on the jig can only realize gathering and fixing of the PCB plates of specified size, such as the automatic PCB plate feeding machine disclosed in Chinese patent CN220200359U, the inside of the out-frame track frame and the in-frame track frame is respectively provided with a bottom driving chain and an upper driving chain for supporting the PCB plate placing frame, the lower supporting plate and the upper supporting plate are respectively provided with a first travel switch and a second travel switch, a lifting plate is slidably connected in the guide rail frame, the lifting plate is connected with a lifting mechanism on the right side, the lifting mechanism comprises two groups of light rods, a screw rod and a motor installed in the electric box, the output end of the motor is connected to the pulley on the top of the screw rod through a synchronous belt, the upper driving chain and the bottom driving chain can realize the entry and exit of the PCB plate placing frame and the PCB plates therein, and the lifting mechanism can realize the downward movement of the upper PCB plate placing frame and the PCB plates therein, so that the upper driving chain and the bottom driving chain can be connected, realizing full-automatic PCB feeding and high work efficiency. However, the existing jig has poor universality for different size PCB plate gathering frames, such as general four standard material frames 250, 330, 390 and 460, and there is a risk of damage to the PCB plates when the PCB plates enter and exit the PCB plate placing frame, and the PCB plate placing frame cannot effectively control the entry and exit of the PCB plates. SUMMARY

[0003] The utility model discloses a PCB plate feeding machine, which greatly improves the applicability of the equipment, ensures the stability of the material frame during conveying, prevents PCB misalignment caused by vibration or movement, ensures the stability and accuracy of the material frame during lifting, and also ensures the orderly feeding of the PCB plates, improves the pushing efficiency, reduces potential damage during pushing, and makes the PCB plates orderly fed, facilitating the production and processing of the next process.

[0004] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0005] A PCB feeding machine, comprising a frame, a first conveying unit arranged at the lower part of one side of the frame, and a frame returning mechanism arranged above the first conveying unit; the first conveying unit comprises a first width adjusting mechanism, a first frame supporting mechanism, and a first conveying assembly; the first conveying unit is provided with the first width adjusting mechanism at one side thereof; the first width adjusting mechanism is connected to the frame at one side thereof; the first width adjusting mechanism is used to adjust the width of the first frame supporting mechanism according to the size of different PCBs or frame; the first frame supporting mechanism is connected to the other side of the first width adjusting mechanism at one side thereof; the other side of the first frame supporting mechanism is connected to the inner side of the frame; the first frame supporting mechanism is adjusted by the first width adjusting mechanism so that the frame falls between the first frame supporting mechanism; the feeding machine is provided with a frame lifting mechanism in the advancing direction of the first conveying unit; the frame lifting mechanism is used to lift the frame layer by layer; the frame returning mechanism is connected with a pushing mechanism; the pushing mechanism is used to push the PCB in the frame out.

[0006] The first frame supporting mechanism is connected with the first conveying assembly; the first conveying assembly is arranged at the inner side of the first frame supporting mechanism; the first conveying assembly is used to convey the frame to the frame lifting mechanism station.

[0007] The first width adjusting mechanism comprises a first width adjusting motor arranged on the side surface of the first frame supporting mechanism; the first width adjusting motor is used to provide driving force for adjusting the width of the first frame supporting mechanism; the first width adjusting motor is connected with a first width adjusting belt at the front end thereof; the inner side of the first width adjusting belt is connected with a first width adjusting shaft; the first width adjusting shaft is used to adjust the width of the first frame supporting mechanism.

[0008] The frame lifting mechanism comprises a second conveying assembly, a lifting assembly, and a frame stabilizing assembly; the second conveying assembly is connected to the inner side of the frame; the second conveying assembly is arranged in front of the first conveying unit; one side of the second conveying assembly is connected with the lifting assembly; the lifting assembly is connected to the inner side of one side of the frame; the lifting assembly is used to lift the frame; the lifting assembly is provided with the frame stabilizing assembly above; the frame stabilizing assembly is connected to the top surface of the outer side of the frame; the frame stabilizing assembly is used to stabilize the frame when pushing the PCB, so as to prevent the frame from moving and causing the PCB to be pushed out.

[0009] The second conveying assembly is kept in the same horizontal plane with the first conveying unit in the conveying direction of the frame, and is used to transfer the frame conveyed by the first conveying unit to the lifting assembly station and to transfer the empty frame to the frame returning mechanism station after the pushing process is completed; the second conveying assembly comprises a second conveying assembly used to provide driving force when conveying the frame; the second conveying assembly is connected with a second frame supporting assembly used to support the frame; and the second frame supporting assembly is connected with a second automatic width adjusting mechanism used to synchronously adjust the width of the first width adjusting mechanism.

[0010] The lifting assembly comprises a lifting step control assembly connected with the inner side of the frame, which is arranged on one side of the second conveying assembly, and is used to control the lifting step of the lifting assembly and to synchronously control the lifting height of the frame.

[0011] The frame stabilizing assembly is horizontally arranged on the top surface of the frame, and is used to fix the frame when the pushing mechanism pushes the PCB out of the frame.

[0012] The pushing mechanism comprises a pushing motor, a pushing rod and a pushing mechanism mounting plate connected inside the frame returning mechanism, the pushing motor is arranged on one side of the pushing mechanism mounting plate, the pushing rod is arranged on the other side of the pushing mechanism mounting plate, the pushing motor is connected with the pushing rod, and the pushing rod is used to push the PCB driven by the pushing motor.

[0013] The frame returning mechanism is provided with a third conveying mechanism connected with the upper part of the frame, and the third conveying mechanism is arranged above the first conveying unit, and is used to transfer the frame to the frame unloading station.

[0014] The third conveying mechanism is provided with a third conveying assembly used to provide driving force when conveying the frame; the third conveying assembly is connected with a third frame supporting assembly connected with the frame, and is used to provide support for conveying the frame; and the outer side of the third frame supporting assembly is connected with a third automatic width adjusting mechanism connected with the frame, and is used to synchronously adjust the width of the first width adjusting mechanism.

[0015] The beneficial effects of the utility model are as follows:

[0016] 1. The first width adjusting mechanism, the second automatic width adjusting mechanism and the third automatic width adjusting mechanism can adjust the width according to the different sizes of the PCB or the frame, so that the board feeding machine can be suitable for frames of various specifications, and the applicability of the utility model is greatly improved.

[0017] 2、The first material frame supporting mechanism and the second material frame supporting assembly provide stable support for the material frame, ensure the stability of the material frame during conveying, and prevent PCB misplacement caused by vibration or movement;

[0018] 3、The lifting step control assembly in the plate feeding lifting mechanism can accurately control the lifting steps and height, ensure the stability and accuracy of the material frame during lifting, and also ensure the orderly feeding of the PCB;

[0019] 4、The push motor and the push rod in the push mechanism can efficiently push the PCB out of the material frame, improve the pushing efficiency, and reduce potential damage during pushing. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is a perspective view of the utility model.

[0021] Figure 2 It is a first conveying unit perspective view of the utility model.

[0022] Figure 3 It is a first conveying unit partial schematic view of the utility model.

[0023] Figure 4 It is a first conveying unit partial schematic view of the utility model.

[0024] Figure 5 It is a plate feeding lifting mechanism perspective view of the utility model.

[0025] Figure 6 It is a second conveying assembly schematic view of the utility model.

[0026] Figure 7 It is a lifting assembly perspective view of the utility model.

[0027] Figure 8 It is a lifting assembly partial schematic view of the utility model.

[0028] Figure 9 It is a material frame stabilizing assembly perspective view of the utility model.

[0029] Figure 10 It is a push mechanism and frame returning mechanism perspective view of the utility model.

[0030] Figure 11 It is a frame returning mechanism partial schematic view of the utility model.

[0031] BRIEF DESCRIPTION OF DRAWINGS

[0032] 1-frame, 10-pad foot, 11-support frame, 12-mounting fixed plate, 2-first conveying unit, 20-first width adjusting mechanism, 200-first width adjusting motor, 201-first width adjusting belt, 202-first width adjusting shaft, 21-first material frame support mechanism, 210-moving support frame, 2100-moving support block, 2101-moving conveying belt, 211-fixed support frame, 2110-fixed support block, 2111-support conveying belt, 2112-support shaft, 22-first conveying assembly, 220-first conveying motor, 221-first motor belt, 222-first rotating shaft, 3-plate feeding lifting mechanism, 30-second conveying assembly, 300-second conveying assembly, 3000-second conveying motor, 3001-second motor belt, 3002-second rotating shaft, 301-second automatic width adjusting mechanism, 3010-second width adjusting motor, 3011-second width adjusting belt, 3012-second width adjusting shaft, 302-second material frame support assembly, 31-second conveying assembly connecting plate, 32-lifting assembly, 320-lifting step control assembly, 3201-sawtooth limiting strip, 3202-pull chain, 321-fixed support lead screw, 322-transmission lead screw, 323-transmission belt, 324-transmission motor, 33-material frame stabilizing assembly, 330-telescopic motor, 331-telescopic head, 332-telescopic motor mounting plate, 3320-notch, 4-pushing mechanism, 40-pushing motor, 41-pushing rod, 42-pushing mechanism mounting plate, 5-back frame mechanism, 50-third conveying mechanism, 500-third conveying assembly, 5000-third conveying motor, 5001-third motor belt, 5002-third rotating shaft, 51-third automatic width adjusting mechanism, 510-third width adjusting motor, 511-third width adjusting belt, 512-third width adjusting shaft, 52-third material frame support assembly, 6-sensor, 7-control end. DETAILED DESCRIPTION

[0033] The utility model will be further described below in connection with the drawings of the specification:

[0034] As Figures 1-11The utility model relates to a kind of PCB board feeder, including rack 1, first conveying unit 2 being equipped in the lower side of rack 1, the first conveying unit 2 upper is equipped with back frame mechanism 5, the first conveying unit 2 includes first width-adjusting mechanism 20, first material frame support mechanism 21, the first width-adjusting mechanism 20 is used to adjust the width of first material frame support mechanism 21 according to different PCB or material frame size;The first conveying unit 2 is connected with board feeding lifting mechanism 3, the board feeding lifting mechanism 3 is used to lift material frame;The back frame mechanism 5 is connected with rack 1, the back frame mechanism 5 is equipped with push mechanism 4, the push mechanism 4 is used to push PCB in material frame out.The rack 1 is equipped with pad foot 10, the pad foot 10 can make rack 1 stand stably on ground, pad foot 10 connects support frame 11, support frame 11 is connected with installation fixed plate 12, the installation fixed plate 12 is used to install each component structure.

[0035] As Figures 1-4As shown, the first conveying unit 2 is provided with a first conveying assembly 22 for conveying the material frame to the board lifting mechanism 3, the first conveying assembly 22 is connected with a first material frame supporting mechanism 21 for supporting and stabilizing the material frame, so that the material frame is stably conveyed along the first material frame supporting mechanism 21 under the driving of the first conveying assembly 22; the first material frame supporting mechanism 21 comprises a movable supporting frame 210 and a fixed supporting frame 211 parallel to the movable supporting frame 210, the fixed supporting frame 211 is installed on the mounting fixed plate 12 of the rack 1, the fixed supporting frame 211 comprises a fixed supporting block 2110, a supporting conveying belt 2111 and a supporting shaft 2112, the fixed supporting block 2110 is internally provided with a cavity connected with the supporting conveying belt 2111, the supporting shaft 2112 is provided in two groups, one end of the supporting shaft 2112 is connected with the fixed supporting block 2110 for supporting the rotation of the conveying belt 2111 in the cavity of the fixed supporting block 2110, and the other end of the supporting shaft 2112 is connected with the movable supporting frame 210; the movable supporting frame 210 comprises a movable supporting block 2100 and a movable conveying belt 2101, the movable supporting block 2100 is internally provided with a cavity connected with the movable conveying belt 2101, the movable supporting block 2100 is penetratingly connected with the supporting shaft 2112, the movable supporting block 2100 can slide on the supporting shaft 2112, and the movable supporting block 2100 is used for moving the rotation of the movable conveying belt 2101 in the cavity of the movable supporting block 2100; the first conveying assembly 22 comprises a first conveying motor 220, a first motor belt 221, a first rotating shaft 222 and a sensor 6, the first conveying motor 220 is connected with the first motor belt 221, the first conveying motor 220 is used for providing driving force for the first rotating shaft 222, the first motor belt 221 is connected with the first rotating shaft 222, the first rotating shaft 222 is rotationally connected with the movable supporting block 2100 and the fixed supporting block 2110, the first rotating shaft 222 is used for transmitting driving force to the movable conveying belt 2101, when the material frame falls on the movable conveying belt 2101 and the supporting conveying belt 2111, the movable conveying belt 2101 and the supporting conveying belt 2111 rotate synchronously, so as to drive the material frame to move to the board lifting mechanism 3 station; the first width adjusting mechanism 20 comprises a first width adjusting motor 200, a first width adjusting belt 201 and a first width adjusting shaft 202, the first width adjusting motor 200 is connected with the first width adjusting belt 201, the first width adjusting belt 201 is connected with the first width adjusting shaft 202, the first width adjusting shaft 202 is provided in two groups, one end of the first width adjusting shaft 202 is connected with the fixed supporting block 2110, and the other end of the first width adjusting shaft 202 penetratingly passes through the movable supporting block 2100, the first width adjusting motor 200 is used for driving the first width adjusting belt 201 to drive the first width adjusting shaft 202 to rotate, and the first width adjusting shaft 202 is used for driving the movable supporting block 2100 to slide on the supporting shaft 2112.

[0036] Furthermore, the first width adjustment mechanism 20 drives the first width adjustment belt 201 to rotate the first width adjustment shaft 202 via the first width adjustment motor 200. The first width adjustment shaft 202 is threaded, and the movable support block 2100 is provided with a connecting hole that engages with the thread. When the first width adjustment shaft 202 rotates, the movable support block 2100 moves along the threaded trajectory of the first width adjustment shaft 202, while the fixed support frame 211 is fixed on the frame, thereby adjusting the width between the movable support frame 210 and the fixed support frame 211, so that the material frame falls accurately onto the movable conveyor belt 2101 and the support conveyor belt 2111.

[0037] like Figure 1 , 5 As shown in Figure -8, the feeding and lifting mechanism 3 includes a second conveying component 30, a lifting component 32, and a material frame stabilizing component 33. The second conveying component 30 is connected to the lifting component 32, which is used to lift the material frame. The second conveying component 30 is used to transfer the material frame to the working position of the lifting component 32. The second conveying component 30 includes a second conveying component 300, a second automatic width adjustment mechanism 301, and a second material frame support component 302. The second conveying component 300 is connected to the second automatic width adjustment mechanism 301, which is used to synchronize the width adjustment of the first width adjustment mechanism, and its working mechanism is the same as that of the first width adjustment mechanism. The second conveying component 300 includes a second conveying motor 3000, a second motor belt 3001, and a second... The system includes a rotating shaft 3002, a sensor 6, a second conveying motor 3000 connected to a second motor belt 3001, and the second conveying motor 3000 is used to provide driving force for conveying the material frame. The second motor belt 3001 is connected to the second rotating shaft 3002. The second automatic width adjustment mechanism 301 includes a second width adjustment motor 3010, a second width adjustment belt 3011, and a second width adjustment rotating shaft 3012. The second width adjustment motor 3010 is used to drive the second width adjustment belt 3011 to drive the second width adjustment rotating shaft 3012 to rotate. The second width adjustment rotating shaft 3012 is used to drive the movable support block to slide on the support shaft.

[0038] like Figure 1 , 5As shown in Figure -8, the lifting assembly 32 includes a lifting step control assembly 320, which controls the lifting steps and the lifting height of each step. The lifting assembly 32 includes a fixed support screw 321, a transmission screw 322, a transmission belt 323, a transmission motor 324, and the lifting step control assembly 320. One end of the fixed support screw 321 is mounted on the frame base plate, and the other end passes through a second conveyor assembly connecting plate 31 and connects to the mounting plate 12. The second conveyor assembly connecting plate 31 is connected to the second conveyor assembly 30 and is used to synchronously slide the second conveyor assembly 30 on the fixed support screw 321. The transmission motor 324 is mounted on the mounting plate 12 and connected to the transmission screw 322 via the transmission belt 323. Two sets of lead screws 322 are respectively arranged on both sides of the second conveying assembly 30, and the two sets of transmission lead screws 322 are connected by a transmission belt 323. The lifting step control assembly 320 includes a sensor 6, a sawtooth limit bar 3201, and a drag chain 3202. One end of the drag chain 3202 is installed on the support frame 11, and the other end of the drag chain 3202 is connected to the second conveying assembly connecting plate 31. The sensor 6 is installed on the second conveying assembly connecting plate 31, and the sensor 6 is connected to the sawtooth limit bar 3201. The sawtooth limit bar 3201 is installed on the support frame 11. The spacing between the sawtooths on the sawtooth limit bar 3201 is equal to the distance between the PCB boards in the material frame. The control terminal receives a signal once for each sawtooth step that is raised by the sensor 6, thereby controlling the lifting assembly 32 to lift in an orderly manner and keep the lifting height consistent when the transmission motor 324 is working.

[0039] like Figure 1 , 5 As shown in Figure 9, a material frame stabilizing component 33 is installed above the lifting component 32. This component is used to fix the material frame when the pushing mechanism 4 pushes the PCB board out of the material frame. The material frame stabilizing component 33 includes a telescopic motor 330, a telescopic head 331, and a telescopic motor mounting plate 332. The telescopic motor mounting plate 332 is located on the top surface of the support frame 11 and has several slots 3320. The telescopic motor 330 is connected to the telescopic head 331, which is located in the slots 3320. When the material frame enters the lifting component 32, the telescopic motor 330 of the material frame stabilizing component 33 drives the telescopic head 331 to retract and press and fix the material frame. After the PCB board is pushed out, the telescopic head 331 extends and releases the material frame. The empty material frame is then transported to the return frame mechanism 5 for recycling under the operation of the second conveying component 30, and this cycle continues.

[0040] like Figure 1 , 10As shown, the pushing mechanism 4 includes a pushing motor 40, a pushing rod 41, and a pushing mechanism mounting plate 42. The pushing mechanism mounting plate 42 is connected to the return frame mechanism 5 and is used to mount the pushing motor 40 and the pushing rod 41. The pushing motor 40 is mounted on the pushing mechanism mounting plate 42 and is connected to the pushing rod 41. The pushing motor 40 is used to drive the pushing rod 41 to extend when it receives a signal from the control terminal 7. The pushing rod 41 is used to push the PCB board in the material frame out and send it to the next processing position.

[0041] Furthermore, when sensor 6 senses that the lifting component 32 has risen one notch, the push motor 40 receives a signal from the control terminal 7 to drive the push rod 41 to extend. The push rod 41 pushes the PCB board in the material frame out and sends it to the next processing position. Then, after the push rod 41 pushes out, it returns to its initial position, and the lifting component 32 rises one notch again. This cycle continues until all the PCB boards in the material frame have been pushed out.

[0042] like Figures 10-11 As shown, the return frame mechanism 5 includes a third conveying mechanism 50, a third automatic width adjustment mechanism 51, and a third material frame support assembly 52. ​​The third conveying mechanism 50 is connected to the third automatic width adjustment mechanism 51, which is used to synchronize the width of the first width adjustment mechanism. The working mechanism of the third automatic width adjustment mechanism 51 is the same as that of the first width adjustment mechanism. The third conveying mechanism 50 includes a third conveying component 500, which is used to transfer empty material frames. The third conveying component 500 is connected to the third automatic width adjustment mechanism 51 and includes a third conveying motor 5000, a third motor belt 5001, a third rotating shaft 5002, and a sensor. 6. The third conveyor motor 5000 is connected to the third motor belt 5001. The third conveyor motor 5001 is used to provide driving force for conveying the material frame. The third motor belt 5001 is connected to the third rotating shaft 5002. The third automatic width adjustment mechanism 51 includes a third width adjustment motor 510, a third width adjustment belt 511, and a third width adjustment rotating shaft 512. The third width adjustment motor 510 is connected to the third width adjustment belt 511. The third width adjustment belt 511 is connected to the third width adjustment rotating shaft 512. The third width adjustment motor 510 is used to drive the third width adjustment belt 511 to drive the third width adjustment rotating shaft 512 to rotate. The third width adjustment rotating shaft 512 is used to drive the movable support block to slide on the support shaft.

[0043] Working principle: such as Figure 1As shown, the material frame with the PCB board is conveyed to the board feeding lifting mechanism 3 station by the first conveying unit 2, and the board feeding lifting mechanism 3 cooperates with the pushing mechanism 4 to orderly separate and push the PCB board to the subsequent processing production line, when the PCB board is completely fed out, the empty material frame is transferred to the frame returning mechanism 5, the frame returning mechanism 5 moves the material frame to the tail end waiting position to unload the empty material frame, and the cycle can automatically and continuously provide the PCB board for the downstream production line.

[0044] The above is only a preferred embodiment of the present application, and does not limit the scope of the present application, so equivalent changes or decorations made by ordinary engineering technicians to the structure, features and principles described in the present application without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A PCB board feeder comprising a frame, characterized in that: The lower part of one side of the rack is provided with a first conveying unit, and a frame returning mechanism is arranged above the first conveying unit. The first conveying unit comprises a first width adjusting mechanism connected to one side of the rack and a first frame support mechanism connected to the other side of the first width adjusting mechanism. The first width adjusting mechanism is used to adjust the width of the first frame support mechanism. The other side of the first frame support mechanism is connected to the inner side of the rack. A plate feeding lifting mechanism is arranged in the feeding direction of the frame feeding of the first conveying unit. The plate feeding lifting mechanism is used to lift the frame layer by layer. The frame returning mechanism is connected with a pushing mechanism. The pushing mechanism is used to push the PCB in the frame.

2. The PCB board feeder according to claim 1, wherein: The first frame support mechanism is connected with a first conveying assembly. The first conveying assembly is located inside the first frame support mechanism. The first conveying assembly is used to convey the frame to the plate feeding lifting mechanism station.

3. The PCB board feeder according to claim 1, wherein: The first width adjusting mechanism comprises a first width adjusting motor installed on the side of the first frame support mechanism. The first width adjusting motor provides driving force for the first width adjusting mechanism to adjust the width of the first frame support mechanism. The front end of the first width adjusting motor is connected with a first width adjusting belt. The inner side of the first width adjusting belt is connected with a first width adjusting shaft. The first width adjusting shaft is used to adjust the width of the first frame support mechanism.

4. The PCB board feeder according to claim 1, wherein: The plate feeding lifting mechanism comprises a second conveying assembly, a lifting assembly, and a frame stabilizing assembly. The second conveying assembly is connected to the inner side of the rack. The second conveying assembly is arranged in front of the first conveying unit. One side of the second conveying assembly is connected with the lifting assembly. The lifting assembly is connected to the inner edge of one side of the rack. The lifting assembly is used to lift the frame. The lifting assembly is provided with the frame stabilizing assembly above. The frame stabilizing assembly is connected to the top surface of the outer side of the rack. The frame stabilizing assembly is used to stabilize the frame when pushing the PCB board, preventing the frame from moving and causing the PCB board to be pushed out.

5. The PCB board feeder according to claim 4, wherein: The second conveying assembly and the first conveying unit maintain the same horizontal plane in the frame conveying direction. The second conveying assembly is used to move the frame conveyed by the first conveying unit to the lifting assembly station and to transfer the empty frame to the frame returning mechanism station after completing the pushing process. The second conveying assembly comprises a second conveying assembly. The second conveying assembly provides driving force when conveying the frame. The second conveying assembly is connected with a second frame support assembly above. The second frame support assembly is used to support the frame. The second frame support assembly is connected with a second automatic width adjusting mechanism. The second automatic width adjusting mechanism is used to synchronize the width adjustment of the first width adjusting mechanism.

6. The PCB board feeder according to claim 4, wherein: The lifting assembly comprises a lifting step control assembly connected to the inner edge of the rack. The lifting step control assembly is arranged on one side of the second conveying assembly. The lifting step control assembly is used to control the lifting steps of the lifting assembly and to synchronize the lifting height of the frame at each step.

7. The PCB board feeder according to claim 4, wherein: The frame stabilizing assembly is horizontally installed above the rack. The frame stabilizing assembly is used to fix the frame when the pushing mechanism pushes the PCB board out of the frame.

8. The PCB board feeder according to claim 1, wherein: The pushing mechanism comprises a pushing motor, a pushing rod, a pushing mechanism mounting plate connected inside the frame returning mechanism, a pushing motor mounted on one side of the pushing mechanism mounting plate, a pushing rod mounted on the other side of the pushing mechanism mounting plate, the pushing motor connected with the pushing rod, and the pushing rod used to push the PCB board driven by the pushing motor.

9. The PCB board feeder according to claim 1, wherein: The frame returning mechanism is provided with a third conveying mechanism connected to the upper part of the rack, the third conveying mechanism is located above the first conveying unit, and the third conveying mechanism is used to transfer the material frame to the frame unloading station.

10. The PCB board feeder according to claim 9, wherein: The third conveying mechanism is provided with a third conveying assembly inside, the third conveying assembly is used to provide driving force when the material frame is moved, a third material frame supporting assembly is connected to the third conveying assembly, the third material frame supporting assembly is connected with the rack, the third material frame supporting assembly is used to provide support for moving the material frame, and the outside of the third material frame supporting assembly is connected with a third automatic width adjusting mechanism, the third automatic width adjusting mechanism is connected with the rack, and the third automatic width adjusting mechanism is used to adjust the width synchronously with the first width adjusting mechanism.

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