Double-track adjustable transportation device and equipment for PCB (Printed Circuit Board)

Abstract

The utility model provides a double-track adjustable transportation device and equipment for a PCB (Printed Circuit Board). The double-track adjustable conveying device for the PCB comprises a rack, a track assembly, a guide assembly and an adjusting assembly. The rail assembly comprises a first rail part, a second rail part, a third rail part and a fourth rail part which are sequentially arranged on the rack at intervals; a first transportation channel is formed between the first rail piece and the second rail piece, a second transportation channel is formed between the third rail piece and the fourth rail piece, and the first transportation channel and the second transportation channel are respectively used for transporting PCBs; the adjusting assembly comprises a first lead screw, a second lead screw, a third lead screw and a fourth lead screw. The first lead screw and the fourth lead screw are rotationally connected to the second rail piece through nut bases so as to drive the second rail piece to be close to or away from the first rail piece. The second lead screw and the third lead screw are rotationally connected to the third rail piece through nut bases so as to drive the third rail piece to be close to or away from the fourth rail piece.

Description

Technical Field

[0001] The utility model relates to the technical field of circuit board transportation, in particular to a double-track adjustable transportation device and equipment for PCB boards. Background Art

[0002] SMT is the abbreviation of Surface Mount Technology, also known as surface mount or surface mounting technology. It is a circuit assembly technology that mounts pinless or short-lead surface mount components on the surface of a printed circuit board (PCB) or other substrate, and assembles them by soldering through reflow soldering or dip soldering.

[0003] Currently, the circuit board manufacturing industry has achieved a high level of automation across all stages of PCB processing. A prerequisite for achieving this level of automation is the use of automated rail transport systems. Specifically, during the transport phase of PCBs entering the reflow oven, a rail transport system is located at the oven entrance. While this system achieves automated transport, it still presents several issues: The overall structure of the rail transport system is complex, and the track width cannot be adjusted, meaning it only accommodates a specific width of PCBs. This results in low furnace loading efficiency, which in turn impacts reflow processing efficiency. Utility Model Content

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a dual-track adjustable transport device and equipment for PCB boards that has a simple structure and realizes dual transport channel adjustment, thereby having the function of synchronously transporting PCB boards of different specifications and widths, thereby effectively improving the efficiency of PCB boards entering the furnace, thereby avoiding affecting the processing efficiency of reflow soldering.

[0005] The purpose of this utility model is achieved through the following technical solutions:

[0006] A double-track adjustable transport device for PCB boards, comprising:

[0007] frame;

[0008] The track assembly includes a first track member, a second track member, a third track member, and a fourth track member sequentially arranged on the frame; a first transport channel is formed between the first track member and the second track member, and a second transport channel is formed between the third track member and the fourth track member, wherein the first transport channel and the second transport channel are respectively used for transporting PCB boards;

[0009] a guide assembly, each of the guide assemblies being slidably connected to the second track member and the third track member;

[0010] An adjustment assembly, the adjustment assembly includes a first screw rod, a second screw rod, a third screw rod and a fourth screw rod; the first screw rod and the fourth screw rod are both rotatably connected to the second track member through a nut seat to drive the second track member to approach or move away from the first track member; the second screw rod and the third screw rod are both rotatably connected to the third track member through a nut seat to drive the third track member to approach or move away from the fourth track member.

[0011] In one embodiment, it is characterized in that the double-track adjustable transport device for the PCB board also includes a first screw motor and a second screw motor; the first screw motor is used to synchronously drive the first screw and the fourth screw to rotate; the second screw motor is used to synchronously drive the second screw and the third screw to rotate.

[0012] In one embodiment, it is characterized in that the double-track adjustable transport device for the PCB board also includes a central control box, the first screw motor and the second screw motor are built into the central control box, the central control box and the first track member are respectively fixedly installed on one side of the frame, the fourth track member is fixedly installed on the other side of the frame, and the control end of the central control box is electrically connected to the first screw motor and the second screw motor respectively.

[0013] In one embodiment, it is characterized in that the double-track adjustable transport device for the PCB board also includes a connecting component, the connecting component includes a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate; the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are respectively installed with a nut seat and a sliding seat; the first connecting plate and the second connecting plate are installed on the second track member at intervals, and the third connecting plate and the fourth connecting plate are installed on the third track member at intervals; the first screw rod is threadedly connected to the nut seat on the first connecting plate, the second screw rod is threadedly connected to the nut seat on the third connecting plate, the third screw rod is threadedly connected to the nut seat on the fourth connecting plate, and the fourth screw rod is threadedly connected to the nut seat on the second connecting plate; the guide assembly is slidably connected to the sliding seat.

[0014] In one embodiment, it is characterized in that the guide assembly includes a first guide rod and a second guide rod; the first guide rods are slidably connected to the sliding seat on the first connecting plate and the sliding seat on the third connecting plate; the second guide rods are slidably connected to the sliding seat on the second connecting plate and the sliding seat on the fourth connecting plate.

[0015] In one embodiment, the sliding seat on the first connecting plate is aligned with the sliding seat on the third connecting plate, and the nut seat on the first connecting plate is staggered with the nut seat on the third connecting plate;

[0016] The sliding seat on the second connecting plate is aligned with the sliding seat on the fourth connecting plate, and the nut seat on the second connecting plate is staggered with the nut seat on the fourth connecting plate.

[0017] In one embodiment, the double-track adjustable transport device for PCB boards also includes a wheeled conveying mechanism, and the first track member is adjacent to the side of the first transport channel, the second track member is adjacent to the side of the first transport channel, the third track member is adjacent to the side of the second transport channel, and the fourth track member is adjacent to the side of the second transport channel. The wheeled conveying mechanism is fixedly installed.

[0018] In one embodiment, the pulley conveying mechanism includes a stepper motor and a mounting plate; one end of the mounting plate is connected to the first rail member, the second rail member, the third rail member or the fourth rail member, and the other end of the mounting plate is used to fix the stepper motor, and the stepper motor is located below the first transport channel or below the second transport channel.

[0019] In one embodiment, the pulley transmission mechanism further includes a driving pulley, a plurality of driven pulleys and a conveyor belt; the driving pulley is fixedly mounted on the power output shaft of the stepper motor, and the driving pulley is used to drive the conveyor belt to transport the PCB board through the plurality of driven pulleys.

[0020] A double-track adjustable transport device for PCB boards includes the double-track adjustable transport device for PCB boards described in any one of the above embodiments.

[0021] Compared with the prior art, the present invention has at least the following advantages:

[0022] Since the guide components are slidably connected to the second rail member and the third rail member, the first and fourth screw rods are synchronously driven to rotate, and the rotational motion is then converted into horizontal linear motion through the nut seat, so that the second rail member can flexibly adjust the spacing with the first rail member; similarly, the second and fourth screw rods are synchronously driven to rotate, and the rotational motion is converted into horizontal linear motion through the nut seat, so that the third rail member can flexibly adjust the spacing with the fourth rail member, that is, the transport width of the first transport channel and the transport width of the second transport channel are adapted to PCB boards of different specifications and widths, thereby realizing the synchronous transport of PCB boards of different widths. The dual-track adjustable transport device for PCB boards of the utility model has a simple structure, can adjust the transport width of the transport channel, and has the function of synchronously transporting PCB boards of different specifications and widths, thereby effectively improving the efficiency of PCB boards entering the furnace, thus avoiding affecting the processing efficiency of reflow soldering. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 Schematic diagram of the structure of a dual-track adjustable transport device for PCB boards in one embodiment;

[0025] Figure 2 for Figure 1 A schematic diagram of a portion of the structure of a dual-track adjustable transport device for PCB boards is shown;

[0026] Figure 3 for Figure 1 A schematic diagram of a portion of the structure of a dual-track adjustable transport device for PCB boards is shown;

[0027] Figure 4 for Figure 3 A partial enlarged view of point A of the dual-track adjustable transport device for PCB boards shown;

[0028] Figure 1: Double-track adjustable transport device 10 for PCB boards; frame 100; track assembly 200; first track member 210; second track member 220; third track member 230; fourth track member 240; first transport channel 201; second transport channel 202; guide assembly 300; first guide rod 310; second guide rod 320; adjustment assembly 400; first screw rod 410; second screw rod 420; third screw rod 430; fourth screw rod 440; central control box 500; connecting assembly 600; first connecting plate 610; second connecting plate 620; third connecting plate 630; fourth connecting plate 640; pulley transmission mechanism 700; stepper motor 710; mounting plate 720; driving pulley 730; driven pulley 740; conveyor belt 750; nut seat 800; sliding seat 900. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present invention, a more comprehensive description of the present invention will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present invention. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present invention.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] The present disclosure provides a double-track adjustable transport device for PCB boards, comprising a frame, a track assembly, a guide assembly and an adjustment assembly; the track assembly comprises a first track member, a second track member, a third track member and a fourth track member arranged in sequence and at intervals on the frame; a first transport channel is formed between the first track member and the second track member, and a second transport channel is formed between the third track member and the fourth track member, the first transport channel and the second transport channel being respectively used for transporting PCB boards; the guide assemblies are slidably connected to the second track member and the third track member; the adjustment assembly comprises a first screw rod, a second screw rod, a third screw rod and a fourth screw rod; the first screw rod and the fourth screw rod are both rotatably connected to the second track member via a nut seat to drive the second track member to approach or move away from the first track member; the second screw rod and the third screw rod are both rotatably connected to the third track member via a nut seat to drive the third track member to approach or move away from the fourth track member.

[0033] See also Figures 1 to 4 In order to better understand the dual-track adjustable transport device 10 for PCB boards of the present application, the dual-track adjustable transport device 10 for PCB boards is further explained below:

[0034] A dual-track adjustable transport device 10 for PCB boards in one embodiment includes a frame 100, a track assembly 200, a guide assembly 300, and an adjustment assembly 400; the track assembly 200 includes a first track member 210, a second track member 220, a third track member 230, and a fourth track member 240 sequentially arranged on the frame 100; a first transport channel 201 is formed between the first track member 210 and the second track member 220, and a second transport channel 202 is formed between the third track member 230 and the fourth track member 240. The first transport channel 201 and the second transport channel 202 are respectively used to transport PCB boards; The guide assembly 300 is slidingly connected to the second rail member 220 and the third rail member 230; the adjustment assembly 400 includes a first screw rod 410, a second screw rod 420, a third screw rod 430 and a fourth screw rod 440; the first screw rod 410 and the fourth screw rod 440 are both rotatably connected to the second rail member 220 through the nut seat 800 to drive the second rail member 220 to approach or move away from the first rail member 210; the second screw rod 420 and the third screw rod 430 are both rotatably connected to the third rail member 230 through the nut seat 800 to drive the third rail member 230 to approach or move away from the fourth rail member 240.

[0035] In this embodiment, since the guide assembly 300 is slidably connected to the second rail member 220 and the third rail member 230, the first screw rod 410 and the fourth screw rod 440 are synchronously driven to rotate, and the rotational motion is then converted into horizontal linear motion by the nut seat 800, so that the second rail member 220 can be flexibly adjusted to the spacing between the first rail member 210; similarly, the second screw rod 420 and the fourth screw rod 440 are synchronously driven to rotate, and the rotational motion is then converted into horizontal linear motion by the nut seat 800, so that the third rail member 230 can be flexibly adjusted to the spacing between the fourth rail member 240, that is, the transport width of the first transport channel 201 and the transport width of the second transport channel 202 are adapted to PCB boards of different specifications and widths, thereby achieving the synchronous transport of PCB boards of different widths. The dual-track adjustable transport device 10 for PCB boards of the present invention has a simple structure, can adjust the transport width of the transport channel, and has the function of synchronously transporting PCB boards of different specifications and widths, thereby effectively improving the efficiency of PCB board feeding into the furnace, thereby avoiding affecting the processing efficiency of reflow soldering.

[0036] like Figure 1 and Figure 2 As shown, in one embodiment, the double-track adjustable transport device 10 for the PCB board also includes a first screw motor (not shown) and a second screw motor (not shown); the first screw motor is used to synchronously drive the first screw 410 and the fourth screw 440 to rotate; the second screw 420 motor is used to synchronously drive the second screw 420 and the third screw 430 to rotate.

[0037] It can be understood that since the first screw rod 410 and the fourth screw rod 440 are both rotatably connected to the second rail member 220 through the nut seat 800, the first screw rod 410 and the fourth screw rod 440 are synchronously driven by the first screw motor to convert the rotational motion of the first screw rod 410 and the fourth screw rod 440 into horizontal linear motion, thereby driving the second rail member 220 close to or away from the first rail member 210, and then effectively adjusting the transport width of the first transport channel 201 to better adapt to the board width of the PCB board.

[0038] Similarly, since the second screw rod 420 and the third screw rod 430 are both rotatably connected to the third rail member 230 through the nut seat 800, the second screw rod 420 and the third screw rod 430 are synchronously driven by the second screw motor to convert the rotational motion of the second screw rod 420 and the third screw rod 430 into horizontal linear motion, thereby driving the third rail member 230 to approach or move away from the fourth rail member 240, thereby effectively adjusting the transport width of the second transport channel 202 to better adapt to the board width of the PCB board.

[0039] It should be noted that the working principle of the first screw motor synchronously driving the first screw 410 and the fourth screw 440 to rotate, and the second screw motor synchronously driving the second screw 420 and the third screw 430 to rotate is the existing technology. For example, the power output shaft of the first screw motor can synchronously drive the two screws to rotate through a coupling or gear transmission. Therefore, no further details will be given here.

[0040] like Figure 1 and Figure 2 As shown, in one embodiment, the double-track adjustable transport device 10 for the PCB board also includes a central control box 500, the first screw motor and the second screw motor are built into the central control box 500, the central control box 500 and the first track member 210 are respectively fixedly installed on one side of the frame 100, and the fourth track member 240 is fixedly installed on the other side of the frame 100, and the control end of the central control box 500 is electrically connected to the first screw motor and the second screw motor respectively.

[0041] It can be understood that the central control box 500 is fixedly installed on one side of the frame 100, and the first screw motor and the second screw motor are built into the central control box 500, which improves the structural space utilization of the double-track adjustable transportation device 10 for PCB boards; at the same time, the control end of the central control box 500 is used to facilitate unified control of the first screw motor and the second screw motor.

[0042] like Figure 1 and Figure 2 As shown, in one embodiment, the double-track adjustable transport device 10 for PCB boards further includes a connecting assembly 600, and the connecting assembly 600 includes a first connecting plate 610, a first connecting plate 620, a third connecting plate 630 and a fourth connecting plate 640; the first connecting plate 610, the first connecting plate 620, the third connecting plate 630 and the fourth connecting plate 640 are respectively installed with a nut seat 800 and a sliding seat 900; the first connecting plate 610 and the first connecting plate 620 are installed at intervals on the second track member 220, The third connecting plate 630 and the fourth connecting plate 640 are installed at intervals on the third rail member 230; the first screw rod 410 is threadedly connected to the nut seat 800 on the first connecting plate 610, the second screw rod 420 is threadedly connected to the nut seat 800 on the third connecting plate 630, the third screw rod 430 is threadedly connected to the nut seat 800 on the fourth connecting plate 640, and the fourth screw rod 440 is threadedly connected to the nut seat 800 on the first connecting plate 620; the guide assembly 300 is slidably connected to the sliding seat 900.

[0043] In one embodiment, the guide assembly 300 includes a first guide rod 310 and a second guide rod 320; the first guide rod 310 is slidably connected to the sliding seat 900 on the first connecting plate 610 and the sliding seat 900 on the third connecting plate 630; the second guide rod 320 is slidably connected to the sliding seat 900 on the first connecting plate 620 and the sliding seat 900 on the fourth connecting plate 640.

[0044] It can be understood that since the first screw rod 410 is threadedly connected to the nut seat 800 on the first connecting plate 610, and the fourth screw rod 440 is threadedly connected to the nut seat 800 on the first connecting plate 620, the first screw rod 410 and the fourth screw rod 440 are synchronously driven to rotate, and the second rail member 220 can be driven to adjust the transport width of the first transport channel 201; similarly, since the second screw rod 420 is threadedly connected to the nut seat 800 on the third connecting plate 630, and the third screw rod 430 is threadedly connected to the nut seat 800 on the fourth connecting plate 640, the synchronous driving The second screw rod 420 and the third screw rod 430 rotate to drive the third rail member 230 to adjust the transport width of the second transport channel 202; and the sliding seat 900 on the first connecting plate 610 and the sliding seat 900 on the third connecting plate 630 are both slidably connected to the first guide rod 310, and the sliding seat 900 on the first connecting plate 620 and the sliding seat 900 on the fourth connecting plate 640 are both slidably connected to the second guide rod 320, thereby effectively ensuring that the second rail member 220 or the third rail member 230 has better movement smoothness during the adjustment process.

[0045] like Figure 2As shown, in one embodiment, the sliding seat 900 on the first connecting plate 610 is aligned with the sliding seat 900 on the third connecting plate 630, and the nut seat 800 on the first connecting plate 610 is staggered with the nut seat 800 on the third connecting plate 630; the sliding seat 900 on the first connecting plate 620 is aligned with the sliding seat 900 on the fourth connecting plate 640, and the nut seat 800 on the first connecting plate 620 is staggered with the nut seat 800 on the fourth connecting plate 640. In this way, it is effectively ensured that the first guide rod 310 can be slidably connected to the sliding seat 900 on the first connecting plate 610 and the sliding seat 900 on the third connecting plate 630 at the same time, and the second guide rod 320 can be slidably connected to the sliding seat 900 on the first connecting plate 620 and the sliding seat 900 on the fourth connecting plate 640 at the same time, so that the second rail member 220 or the third rail member 230 can simultaneously utilize the first guide rod 310 and the second guide rod 320 for guided movement during the adjustment process, and the various components do not interfere with each other, thereby effectively improving the utilization rate of the first guide rod 310 and the second guide rod 320, and the structural rationality of the double-track adjustable transportation device 10 for PCB boards.

[0046] like Figure 2 As shown, in one embodiment, the dual-track adjustable transport device 10 for PCB boards further includes a wheeled conveyor mechanism 700. The wheeled conveyor mechanism 700 is fixedly mounted on a side of the first track member 210 adjacent to the first transport channel 201, a side of the second track member 220 adjacent to the first transport channel 201, a side of the third track member 230 adjacent to the second transport channel 202, and a side of the fourth track member 240 adjacent to the second transport channel 202. This effectively improves the automated transport efficiency of the dual-track adjustable transport device 10 for PCB boards.

[0047] like Figure 2 and Figure 3As shown, in one embodiment, the pulley transmission mechanism 700 includes a stepper motor 710 and a mounting plate 720; one end of the mounting plate 720 is connected to the first rail member 210, the second rail member 220, the third rail member 230, or the fourth rail member 240, and the other end of the mounting plate 720 is used to fix the stepper motor 710, and the stepper motor 710 is located below the first transport channel 201 or below the second transport channel 202. In one embodiment, the pulley transmission mechanism 700 also includes a driving pulley 730, a plurality of driven pulleys 740, and a conveyor belt 750; the driving pulley 730 is fixedly mounted on the power output shaft of the stepper motor 710, and the driving pulley 730 is used to drive the conveyor belt 750 to transport the PCB board through the plurality of driven pulleys 740.

[0048] It can be understood that in this embodiment, the first rail member 210, the second rail member 220, the third rail member 230 or the fourth rail member 240 are each equipped with a pulley transmission mechanism 700 to ensure that the first transport channel 201 and the second transport channel 202 have better transport capabilities; further, the control end of the central control box 500 is also electrically connected to the stepper motor 710 in the pulley transmission mechanism 700 of the first rail member 210, the second rail member 220, the third rail member 230 and the fourth rail member 240, so as to improve the transport efficiency of the first transport channel 201 and the second transport channel 202 by coordinating the output parameters of each stepper motor 710.

[0049] The present application also provides a dual-track adjustable transport device for PCB boards, including the dual-track adjustable transport device 10 for PCB boards described in any of the above embodiments.

[0050] In this embodiment, since the guide components are slidably connected to the second rail member and the third rail member, the first screw rod and the fourth screw rod are synchronously driven to rotate, and the rotational motion is converted into horizontal linear motion through the nut seat, so that the second rail member can flexibly adjust the spacing with the first rail member; similarly, the second screw rod and the fourth screw rod are synchronously driven to rotate, and the rotational motion is converted into horizontal linear motion through the nut seat, so that the third rail member can flexibly adjust the spacing with the fourth rail member, that is, the transport width of the first transport channel and the transport width of the second transport channel are adapted to PCB boards of different specifications and widths, thereby realizing the synchronous transport of PCB boards of different widths. The dual-track adjustable transport equipment for PCB boards of the utility model has a simple structure, can adjust the transport width of the transport channel, and has the function of synchronously transporting PCB boards of different specifications and widths, thereby effectively improving the efficiency of PCB boards entering the furnace, thereby avoiding affecting the processing efficiency of reflow soldering.

[0051] Compared with the prior art, the present invention has at least the following advantages:

[0052] Since the guide components are slidably connected to the second rail member and the third rail member, the first and fourth screw rods are synchronously driven to rotate, and the rotational motion is then converted into horizontal linear motion through the nut seat, so that the second rail member can flexibly adjust the spacing with the first rail member; similarly, the second and fourth screw rods are synchronously driven to rotate, and the rotational motion is converted into horizontal linear motion through the nut seat, so that the third rail member can flexibly adjust the spacing with the fourth rail member, that is, the transport width of the first transport channel and the transport width of the second transport channel are adapted to PCB boards of different specifications and widths, thereby realizing the synchronous transport of PCB boards of different widths. The dual-track adjustable transport device for PCB boards of the utility model has a simple structure, can adjust the transport width of the transport channel, and has the function of synchronously transporting PCB boards of different specifications and widths, thereby effectively improving the efficiency of PCB boards entering the furnace, thus avoiding affecting the processing efficiency of reflow soldering.

[0053] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A dual-track adjustable transport device for PCB boards, characterized in that: include: frame; The track assembly includes a first track member, a second track member, a third track member, and a fourth track member sequentially arranged on the frame at intervals; A first transport channel is formed between the first track member and the second track member, and a second transport channel is formed between the third track member and the fourth track member. The first transport channel and the second transport channel are respectively used for transporting PCB boards; a guide assembly, each of the guide assemblies being slidably connected to the second track member and the third track member; An adjustment assembly, the adjustment assembly includes a first screw rod, a second screw rod, a third screw rod and a fourth screw rod; the first screw rod and the fourth screw rod are both rotatably connected to the second track member through a nut seat to drive the second track member to approach or move away from the first track member; the second screw rod and the third screw rod are both rotatably connected to the third track member through a nut seat to drive the third track member to approach or move away from the fourth track member.

2. The double-track adjustable transport device for PCB boards according to claim 1, characterized in that: The double-track adjustable transport device for the PCB board also includes a first screw motor and a second screw motor; the first screw motor is used to synchronously drive the first screw and the fourth screw to rotate; the second screw motor is used to synchronously drive the second screw and the third screw to rotate.

3. The double-track adjustable transport device for PCB boards according to claim 2, characterized in that: The double-track adjustable transport device for the PCB board also includes a central control box, the first screw motor and the second screw motor are built into the central control box, the central control box and the first track member are respectively fixedly installed on one side of the frame, and the fourth track member is fixedly installed on the other side of the frame, and the control end of the central control box is electrically connected to the first screw motor and the second screw motor respectively.

4. The double-track adjustable transport device for PCB boards according to claim 1, characterized in that: The double-track adjustable transport device for PCB boards also includes a connecting assembly, which includes a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate; the first connecting plate, the second connecting plate, the third connecting plate and the fourth connecting plate are respectively installed with a nut seat and a sliding seat; the first connecting plate and the second connecting plate are installed on the second track member at intervals, and the third connecting plate and the fourth connecting plate are installed on the third track member at intervals; the first screw rod is threadedly connected to the nut seat on the first connecting plate, the second screw rod is threadedly connected to the nut seat on the third connecting plate, the third screw rod is threadedly connected to the nut seat on the fourth connecting plate, and the fourth screw rod is threadedly connected to the nut seat on the second connecting plate; the guide assembly is slidably connected to the sliding seat.

5. The double-track adjustable transport device for PCB boards according to claim 4, characterized in that: The guide assembly includes a first guide rod and a second guide rod; the first guide rod is slidably connected to the sliding seat on the first connecting plate and the sliding seat on the third connecting plate; the second guide rod is slidably connected to the sliding seat on the second connecting plate and the sliding seat on the fourth connecting plate.

6. The double-track adjustable transport device for PCB boards according to claim 4, characterized in that: The sliding seat on the first connecting plate is aligned with the sliding seat on the third connecting plate, and the nut seat on the first connecting plate is staggered with the nut seat on the third connecting plate; The sliding seat on the second connecting plate is aligned with the sliding seat on the fourth connecting plate, and the nut seat on the second connecting plate is staggered with the nut seat on the fourth connecting plate.

7. The double-track adjustable transport device for PCB boards according to claim 1, characterized in that: The double-track adjustable transport device for PCB boards also includes a wheeled conveying mechanism, and the wheeled conveying mechanism is fixedly installed on the side of the first track member adjacent to the first transport channel, the side of the second track member adjacent to the first transport channel, the side of the third track member adjacent to the second transport channel, and the side of the fourth track member adjacent to the second transport channel.

8. The double-track adjustable transport device for PCB boards according to claim 7, characterized in that: The pulley transmission mechanism includes a stepper motor and a mounting plate; one end of the mounting plate is connected to the first rail member, the second rail member, the third rail member or the fourth rail member, and the other end of the mounting plate is used to fix the stepper motor, and the stepper motor is located below the first transport channel or below the second transport channel.

9. The double-track adjustable transport device for PCB boards according to claim 8, characterized in that: The pulley transmission mechanism also includes a driving pulley, multiple driven pulleys and a conveyor belt; the driving pulley is fixedly installed on the power output shaft of the stepper motor, and the driving pulley is used to drive the conveyor belt to transport the PCB board through the multiple driven pulleys.

10. A dual-track adjustable transport device for PCB boards, characterized in that: A double-track adjustable transport device for PCB boards comprising any one of claims 1-9.

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